CN112912048B - Bed device - Google Patents

Abstract

A bed device is provided with a bed frame, a bed base body, a back lift mechanism, a working shaft, a mounting member, a transmission member, and a pressing member. The bed body includes a fixed bed portion and a back bed portion having a central back portion and a pair of side back portions and provided so as to be rotatable relative to the fixed bed portion, the pair of side back portions being rotatably connected to both of the central back portions in the forward direction. side. The back lift mechanism makes the back bed rise and fall. The working shaft can be rotatably supported by the back surface of the center back. The mounting member is provided in the middle part of the working shaft. One end of the transmission member is fixed to the mounting member, and the other end is fixed to a portion that generates tension when the back bed portion is driven in the lifting direction, and the transmission member rotates the working shaft by the tension. The pressing member is provided at both ends of the working shaft so as to be able to change the angle, and when the working shaft is rotated by the transmission member, the pair of side backs are positioned at one of the working position that rotates forward and the non-working position that does not rotate forward. either.

Description

bed unit

technical field

The present invention relates to a back-lifting bed device suitable for users with physical inconvenience.

Background technique

For example, as a bed apparatus used by a physically handicapped user, a lift-back type bed apparatus is known. In the back lift-type bed apparatus, the bed plate body provided in the bed frame is divided into a plurality of parts such as a back bed part, a lumbar bed part, and a leg bed part, and these bed parts are rotatably connected. The back bed part is arranged at a position corresponding to the upper body of the user, and can be driven by the back lift mechanism to rise and fall.

In the above-mentioned back lift-type bed apparatus, when a user with poor physical strength or the like raises the back bed portion to get up the upper body, there is a possibility that the posture cannot be maintained and the user may fall sideways. Therefore, as shown in Patent Document 1, there is proposed a bed device capable of preventing a user whose upper body has been raised from falling sideways.

In the bed device shown in Patent Document 1, the back bed portion is composed of a central back portion and a pair of side back portions rotatably coupled to both sides of the central back portion. The back bed part is made of foamed resin, and a pair of protruding parts each having an inclined surface is integrally formed on the back surface of the pair of side back parts. An inclined portion is formed at the end portion which becomes the upper end when the back is lifted.

On the other hand, a push-up roller is provided in addition to the back-lifting roller on the back-lifting arm that undulates the back-lifting bed. When the back lift arm is driven to rotate in the ascending direction to lift the back lift bed, the push-up roller rotates and moves from the inclined surface to the ridge portion provided on the back of the raised side back. Thereby, depending on the height of the ridge portion, the side back portion is pressed to the front surface side of the center back portion.

At this time, the pair of side backs rotate forward with one side in the width direction connected to the central back as a fulcrum, and the pair of rotated side backs prevent the head of the user whose upper body has been raised from turning to the side. Fang fell.

prior art literature

Patent Literature

Patent Document 1: Japanese Patent No. 3910873

SUMMARY OF THE INVENTION

The problem to be solved by the invention

According to the above-described conventional structure, as a member constituting a mechanism for inclining the side back, it is necessary to provide the upper push roller on the back lift arm and to provide the protruding portion on the side back.

That is, it is necessary to provide a back lift arm that constitutes a back lift mechanism that undulates the back bed portion relative to the lumbar bed portion, a push-up roller that constitutes a mechanism to incline the side back portion, and a ridge portion to be provided on the back surface of the side back portion. In addition, the back lift arm, the push-up roller, and the protruding portion must be positioned in relation to each other.

Therefore, since the relative assembly accuracy and manufacturing accuracy of the back lift mechanism and the mechanism for tilting the side back are required, the manufacturing and assembling operations are time-consuming.

The present invention provides a bed device capable of rotating the side backs provided on both sides of the central back of the back bed by a mechanism separate from the back-lifting mechanism in the forward direction when the back is lifted.

method used to solve the problem

A bed apparatus according to an embodiment of the present invention includes:

bed frame;

A bed base including a fixed bed portion fixed to the bed frame, and a back bed portion having a central back portion and a pair of side back portions and provided so as to be rotatable relative to the fixed bed portion, the pair of side back portions facing The front direction is rotatably connected to both sides of the central back;

a back-lifting mechanism, which undulates the back-bed portion of the bed board body;

a working shaft that is rotatably supported by the back of the central back so that its axis is along the width direction of the central back;

an installation member, which is arranged in the middle part of the working shaft;

One end of a transmission member is fixed to the mounting member, and the other end is fixed to a portion that generates tension when the back bed portion is driven in the lifting direction by operating the back lift mechanism, and the transmission member causes the tension member to be driven by the tension. the working shaft rotates in a prescribed direction; and

a pressing member provided on both end portions of the working shaft so as to be able to change an angle with respect to the circumferential direction of the working shaft, the back bed portion being driven in a lifting direction and the working shaft being held When the transmission member is rotated, the pair of side backs are positioned in either an operating position in which the transmission member is rotated forward and a non-operating position in which it does not rotate forward.

Description of drawings

FIG. 1 is a perspective view showing a bed apparatus for raising a back bed part according to a first embodiment of the present invention.

Fig. 2 is a perspective view of a bed base body of the bed apparatus being laid down.

Fig. 3 is a plan view showing a bed frame.

FIG. 4 is an explanatory diagram of a drive mechanism for undulating drive of the bed body.

5 is a view showing the back side of the back bed portion, the first lumbar bed portion, the second lumbar bed portion, and the fixed bed portion of the bed board body.

FIG. 6 is a view showing a stretched state of a wire rod that drives the side back of the back bed part in accordance with the back lift drive.

FIG. 7( a ) is a plan view of one end portion of the working shaft provided with the pressing member, and FIG. 7( b ) is a side view of the one end portion.

8 is a side view of the bed body of the head-up mechanism showing a state in which the back bed portion is not inclined forward when the back bed portion is raised.

9 is a side view of the bed body of the head-up mechanism showing a state in which the back bed portion is inclined forward when the back bed portion is raised.

Fig. 10(a) is a rear view of a state in which the side backs of the back bed are not inclined toward the front surface side of the center back, and Fig. 10(b) is a state where the side backs are inclined toward the front surface side of the center back back view of the state.

11 is a view showing the back side of the back bed portion, the first lumbar bed portion, the second lumbar bed portion, and the fixed bed portion of the deck body according to the second embodiment of the present invention.

FIG. 12( a ) is a side view of the bed body shown in FIG. 11 , and FIG. 12( b ) is a side view of a state in which the back bed portion is inclined forward by the head-up mechanism.

FIG. 13( a ) is an enlarged side view of the back bed portion of FIG. 12( a ), and FIG. 13( b ) is an enlarged side view of the back bed portion of FIG. 12( b ).

Fig. 14(a) is a side view showing a side lift mechanism and a head-up mechanism provided on the back side of the back bed portion, Fig. 14(b) is a front view of these mechanisms, and Fig. 14(c) is a Side view of these mechanisms.

FIG. 15 is an enlarged view of a connecting portion of the mounting arm and the movable arm of the head-up mechanism.

Detailed ways

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 10 .

1 and 2 are perspective views of the bed apparatus according to the present embodiment. This bed apparatus includes the base frame 1 shown in FIG. 2 . The base frame 1 is formed in a rectangular shape, and installation legs 2 are provided at the four corners thereof. In addition, casters may be provided instead of the installation feet 2 .

As shown in FIG. 2 , one end of the connecting rods 4 (only three places are shown in the figure) constituting the vertical drive mechanism 3 is pivotally connected to the upper surface of the four corners of the base frame 1 , and the other ends are respectively pivoted to the structure as described later. The four corners of the rectangular frame-shaped bed frame 5 .

The four connecting rods 4 are driven to be interlocked with each other by an up-down drive source 6 via a not-shown interlocking link. That is, the connecting rod 4 is driven in the raising direction shown in FIG. 2 from the state in which it is folded horizontally with one end pivoted to the base frame 1 as a fulcrum.

Thereby, the bed frame 5 can be deformed from the lowered position shown in FIG. 1 to the raised position shown in FIG. 2 .

As shown in FIG. 3 , the bed frame 5 has a main body frame portion 11 formed in a rectangular frame shape. An adjustment frame 12 is held at one end portion and the other end portion in the longitudinal direction of the main body frame portion 11 , respectively.

The pair of adjustment frames 12 provided on the one end side and the other end side of the main body frame portion 11 in the longitudinal direction are movable along the longitudinal direction of the main body frame portion 11 as indicated by arrow X, and can be further moved by not shown in the figure. The stop unit shown is fixed in the specified moving position.

That is, the entire length of the bed frame 5 can be changed according to the height of the user or the like by adjusting the attachment position of the adjustment frame 12 with respect to the main body frame portion 11 .

A pair of support members 14 are provided on both sides of the pair of adjustment frames 12, respectively. One end of an arm member 15 is rotatably connected to both ends of each support member 14 , and the other end of these arm members 15 is pivotally connected to the adjustment frame 12 .

Thereby, the support member 14 can move between a position close to the side of the adjustment frame 12 as shown by the solid line in FIG. 3 , and a position away from the side of the adjustment frame 12 as shown by the dashed-dotted line.

Support holes 16 are respectively formed at both end portions in the longitudinal direction of the upper surface of the support member 14 . When the support member 14 is moved to the position shown by the dashed-dotted line, a pair of leg portions of the side rail (not shown) are inserted into the support hole 16 .

As shown in FIG. 1 and FIG. 2 , the lower end of the plate body 17 constituting the head plate and the leg plate is connected to the short side portion of the adjustment frame 12, and the plate body 17 is installed in an upright state.

On both sides of the main body frame portion 11 , decorative members 18 are provided in portions between the pair of support members 14 . The decoration member 18 is provided so that when the support member 14 is positioned close to the side edge of the adjustment frame 12 , the side surface of the decoration member 18 and the side surface of the adjustment frame 12 are almost in a straight line.

Thereby, when the support member 14 is not used, the support member 14 and the decorative member 18 are integrated, and a drop can be prevented from being generated on the side surface of the bed frame 5, so that a good appearance can be exhibited.

As shown in FIGS. 1 and 2 , a bed base body 25 is provided on the upper surface of the bed frame 5 . The bed body 25 has a pair of fixed bed parts 26 which are divided into two parts and are attached to the middle part in the longitudinal direction of the main body frame part 11 .

The first lumbar bed portion 27 and the second lumbar bed portion 28 are sequentially connected to one of the fixed bed portions 26 so as to be rotatable. The connection portion 29 protrudes from one side of the second lumbar bed portion 28 , and the back bed portion 31 is connected to the connection portion 29 .

As shown in FIG. 1 , the back bed portion 31 has a central back portion 32 , the lower end of which is rotatably coupled to the connection portion 29 , and a pair of side back portions 33 coupled to both sides of the central back portion 32 . The center back 32 is rotatable toward the front surface (forward) with the lower end as a fulcrum, and the side back 33 is rotatable toward the front surface with the side connected to the center back 32 as a fulcrum.

The pair of the first leg bed portion 35 and the second leg bed portion 36 are sequentially connected to the other fixed bed portion 26 so as to be rotatable.

The first lumbar bed portion 27 and the second lumbar bed portion 28 , and the first leg bed portion 35 and the second leg bed portion 36 of the bed base body 25 are composed of two overlapping members, and are respectively provided so that one of the members can be opposed to each other. Another member moves. Furthermore, when one of the movable members is moved relative to the other member, one of the members can be fixed at a predetermined moving position relative to the other member.

Accordingly, when the length of the bed frame 5 is changed by moving the adjustment frame 12 relative to the main body frame portion 11 , the bed base body 25 can be set to correspond to the length of the bed frame 5 .

The bed frame 5 is provided with a back lift mechanism 37 shown in FIG. 4 . The bed board body 25 can be lowered into a horizontal state as shown in FIG. 2 by the back lift mechanism 37. The bed portion 35 and the second leg bed portion 36 are driven in the upward direction.

The back lift mechanism 37 has a drive unit 38 having a built-in drive source (not shown). A first drive shaft 41 and a second drive shaft 42 are provided in the drive portion 38 so as to have parallel axes. These drive shafts 41 and 42 are rotated by an unillustrated drive source.

Both end portions of the first drive shaft 41 and the second drive shaft 42 are rotatably supported on both inner surfaces of the main body frame portion 11 of the bed frame 5 .

A connecting rod 43 is provided at one end portion in the axial direction of the first drive shaft 41 and the second drive shaft 42 , respectively. One end and the other end of the connecting arm 44 are rotatably connected to the pair of links 43 . As a result, when the first drive shaft 41 is driven to rotate, the second drive shaft 42 is interlocked with the rotation via the connection arm 44 .

The pair of back lift arms 45 are provided on both ends of the first drive shaft 41 so as to connect the base ends thereof. The pair of back lift rollers 46 are rotatably provided at the front end portions of the pair of back lift arms 45 at predetermined intervals.

One end of the attachment link 47 is connected to both ends of the second drive shaft 42 . The base end portion of the leg link 49 , the front end of which the leg lift roller 48 is rotatably provided, is pivotally connected to the other end of the attachment link 47 .

One end of the interlocking link 51 is pivotally connected to the base end of the leg link 49 , and the other end of the interlocking link 51 is pivotally connected to the end of the second drive shaft 42 . When the second drive shaft 42 rotates in conjunction with the first drive shaft 41 , the interlock link 51 , the leg link 49 , and the mounting link 47 are interlocked with the rotation, and are provided at the front end of the leg link 49 . The leg lift roller 48 is driven in the ascending direction from the lower position.

As a result, the back lift mechanism 37 drives the bed board body 25 in the horizontal state as shown in FIG. 2 , and causes the first lumbar bed portion 27 , the second lumbar bed portion 28 , and the back bed portion 31 as shown in FIG. 1 . lift up. Further, the back lift mechanism 37 bends the first leg bed portion 35 while raising the second leg bed portion 36 .

FIG. 5 shows the back surface of the back bed portion 31 of the deck body 25 (the lower surface when the back bed portion 31 is laid down horizontally as shown in FIG. 2 ). A pair of back raising rails 53 are fixed to the back surface of the second lumbar bed portion 28 , and the pair of back raising rails 53 are spaced apart at predetermined intervals in the width direction of the second lumbar bed portion 28 .

The back lift rail 53 is formed of a member bent so as to have three plate-like portions in cross section, and has a length extending from the first lumbar bed portion 27 to the back surface of the central back portion 32 of the back bed portion 31 .

The back-lifting roller 46 shown in FIG. 4 is rotatably engaged with the back-lifting rail 53 . Thereby, the back lift arm 45 is driven in the lift direction by the rotation of the first drive shaft 41 , and the back lift roller 46 rotates along the back lift rail 53 . At this time, the second lumbar bed portion 28 , the back bed portion 31 , and the first lumbar bed portion 27 interlocking with the second lumbar bed portion 28 are driven to lift up as shown in FIG. 1 from the collapsed state shown in FIG. 2 . up state.

At this time, when the second drive shaft 42 is interlocked with the first drive shaft 41, the first leg bed portion 35 and the second leg bed portion 36 can be driven in the ascending direction. In addition, it is possible to selectively set whether or not to interlock the second drive shaft 42 with the first drive shaft 41 .

The bed body 25 is provided with a pair of head rails 55 on the inner side in the width direction rather than the pair of back lift rails 53 . One ends of these head rails 55 are fixed to the lower surface (back surface) of the first lumbar bed portion 27 . These lift rails 55 are utilized so that the center back part 32 of the back bed part 31 may fall forward with the base end as a fulcrum, as will be described later.

As shown in FIG. 5 , a hollow operating shaft 56 is provided above the front ends of the pair of back lift rails 53 on the back surface of the center back 32 of the back bed portion 31 . Both end portions of the work shaft 56 are rotatably held by holders 57 .

One end of an arm 58 serving as an attachment member having a predetermined length is fixed to a midway portion in the axial direction of the actuating shaft 56 . One end of a wire 59 serving as a conductive member is fixed to the other end of the arm 58 . The wire 59 is engaged with the roller 60 and changes direction to approach the back surface of the central back portion 32 , and the other end extends toward the back surface of the second lumbar bed portion 28 .

Both ends of the cross member 61 are fixedly mounted on one end of the pair of back lift rails 53 on the side of the second lumbar bed portion 28 . A holder 62 is provided in the middle part of the cross member 61 .

As shown in FIG. 6 , the winding shaft 63 to which the pulley 63 a is attached is rotatably supported by the holder 62 . A fastening member 64 such as a nut is provided at one end of the winding shaft 63 . The winding shaft 63 can be held so as not to rotate by the fastening member 64 .

One end portion of the wire 59 is wound by the pulley 63 a of the winding shaft 63 . Therefore, by adjusting the winding length of the wire rod 59 by the pulley 63a, the length of the wire rod 59 from one end connected to the arm 58 to the other end on the winding shaft 63 side can be adjusted.

When the back bed portion 31 is driven in the lifting direction while the first lumbar bed portion 27 and the second lumbar bed portion 28 are bent by the back lift mechanism 37, the linear distance between one end and the other end of the wire rod 59 is reduced and generate tension.

When tension is generated in the wire 59 , the tension is transmitted to the work shaft 56 via the arm 58 . Thereby, the operation shaft 56 rotates in the direction in which the front end side of the arm 58 approaches the back surface of the center back 32 .

As described above, the other end of the wire 59 is wound around the winding shaft 63 of the holder 62 so that the length can be adjusted. On the other hand, the length of the deck body 25 can be adjusted as described above.

Therefore, when the length of the bed body 25 is changed according to the height of the user, the entire length of the wire 59 is changed by adjusting the amount of winding of the other end of the wire 59 with respect to the winding shaft 63 according to the change in length. Thereby, even if the length of the bed body 25 is changed, the back bed portion 31 can be lifted up reliably with a constant tension.

In addition, in the present embodiment, the other end of the wire 59 is fixed to the holder 62 provided on the cross member 61 which is spanned between the pair of back lift rails 53 . As another example, the other end of the wire 59 may be fixed at a position other than the cross member 61 spanned between the back lift rails 53 , that is, it may be fixed at a position generated by the wire 59 when the back bed 31 is driven in the lifting direction. The tensioned portion is, for example, the first lumbar bed portion 27, the second lumbar bed portion 28, or the fixed bed portion 26, or the like.

Both ends of the working shaft 56 are provided with pressing members 66 composed of rollers that press the back surface of the side back 33 of the back bed 31 and rotate forward when the working shaft 56 is rotated by the wire 59 .

That is, as shown in FIGS. 7( a ) and ( b ), one end portion of the support shaft 67 is rotatably inserted into the end portion of the operating shaft 56 . At the other end portion of the support shaft 67 , a mounting groove 68 which penetrates in the radial direction and is open to the front end surface of the support shaft 67 is formed. One end portion of a stopper member 69 having an L-shaped side surface is attached to this attachment groove 68 . A gap 71 at a predetermined interval is formed between the other end portion of the stopper member 69 and the outer peripheral surface of the support shaft 67 , and one end portion in the circumferential direction of the peripheral wall of the operating shaft 56 enters the gap 71 .

An attachment shaft 72 is attached to one end of the stopper member 69 . The axis of the attachment shaft 72 is inclined at a predetermined angle, for example, an angle of 45 degrees with respect to the axis of the support shaft 67 . The pressing member 66 is rotatably attached to the front end portion of the attachment shaft 72 .

Plate-shaped holding members 73 are provided at both end portions of the operating shaft 56 , and the middle portions of the holding members 73 in the vertical direction are fixed along the axial direction of the outer peripheral surface of the support shaft 67 . Both end portions in the vertical direction of the holding member 73 protrude radially outward of the actuating shaft 56 .

The holding member 73 is provided on the side of one side surface of the stopper member 69 , that is, on the front surface side of the stopper member 69 in a state where the operating shaft 56 is attached to the rear surface of the center back 32 .

Thus, by rotating the support shaft 67 relative to the actuating shaft 56 , the mounting shaft 72 is held in either the non-operating position or the operating position, and the stopper member 69 abuts on the lower end portion in the height direction of the holding member 73 . or the upper end, the non-operating position is a state in which the axis of the mounting shaft 72 is inclined upward with respect to the axis of the operating shaft 56 as shown in FIG. The axis is inclined downward.

(b) of FIG. 7 shows a state in which the attachment shaft 72 is held at the operating position, and the stopper member 69 is engaged with the front surface side of the lower end portion 73a of the holding member 73 in the vertical direction.

When the operating shaft 56 is rotated in the direction indicated by the arrow R in FIG. 7( b ) by the tension of the wire 59 when the back is lifted, the mounting shaft 72 is directed toward the side back through the holding member 73 and the operating shaft 56 . 33 is rotated on the back side.

When the attachment shaft 72 rotates, the pressing member 66 provided at the front end portion thereof rotates in a direction to press the back surface of the side back portion 33 . As a result, the side backs 33 are driven from a state in which they are not inclined toward the front surface side of the center back 32 as shown in FIG. 10( a ), and are driven toward the center back 32 as shown in FIG. 10( b ). The state in which the front surface side is inclined.

As a result, the side back portion 33 is in a state where the head of the user whose upper body is supported by the back bed portion 31 is prevented from falling laterally.

The side back part 33 can freely rotate to the front surface side of the center back part 32 with one side as a fulcrum. Therefore, in order to return the side back 33 that has been lifted forward by the pressing member 66 back to the unlifted state, first, the side back 33 is rotated further forward than the state where the pressing member 66 is lifted.

Next, the mounting shaft 72 in the operating position is rotated to a non-operating position in which its axis is inclined upward with respect to the axis of the operating shaft 56, and the stopper member 69 is engaged with the upper end portion 73b of the holding member 73 at this position, Hold the shaft 72 installed.

Therefore, since the holding state of the side back part 33 by the pressing member 66 is released, the side part back part 33 can be returned to the non-inclined state.

In addition, when the back bed portion 31 is lifted with the attachment shaft 72 held at the non-operating position, the back bed portion 31 can be lifted without inclining the side back portion 33 forward.

That is, according to the above-described configuration, when the back bed portion 31 is lifted, the stopper member 69 is rotated and the pressing member 66 is positioned at the operating position or the non-operating position, whereby it is possible to select whether to lift the side back portion 33 or not. Rotate upwards.

Further, a mechanism for driving the pair of side backs 33 provided on both sides of the center back 32 of the back bed 31 is referred to as a side lift mechanism 74 in a direction inclined forward.

The central back portion 32 of which the lower end is rotatably connected to the connecting portion 29 of the second lumbar bed portion 28 can be tilted forward by the head-up mechanism 75 shown in FIGS. 5 , 8 and 9 .

As shown in FIG. 5 , the lift mechanism 75 includes a pair of lift guides 76 provided along a direction (referred to as an up-down direction) intersecting the width direction at both ends of the center back 32 of the back bed portion 31 in the width direction. . Both end portions of the support shaft 77 are rotatably supported between the pair of end portions of the pair of lift guide portions 76 located on the upper end side.

As shown in FIGS. 8 and 9 , one ends of the lift arms 78 are connected to the ends of the support shafts 77 , respectively. The lift-up rollers 79 engaged with the lift-up rails 55 are rotatably supported by the other ends of these lift-up arms 78 .

An arc-shaped first guide groove 81 and a second guide groove 82 are formed on the side surface of the head-up guide portion 76 . The second guide groove 82 is also arc-shaped, and is concentric with the first guide groove 81 and is the same angle.

As shown in FIG. 5 , one end portion and the other end portion of the rod-shaped positioning member 83 are respectively movably inserted through the pair of first guide grooves 81 . One end of the arm member 84 is connected to one end and the other end of the positioning member 83 , respectively. The other ends of the pair of arm members 84 are connected to the connecting rod 85 .

A rod-shaped operating member 86 is provided in the middle of the arm member 84 , one end of which is fixed to the arm member 84 and the other end protrudes from the second guide groove 82 to the outer surface of the lift guide portion 76 .

As shown in FIG. 8 , when the positioning member 83 is located on one end side of the first guide groove 81 , the lift arm 78 is in a state in which one side surface is not pressed by the positioning member 83 and is rotated forward. The riser roller 79 is engaged with the riser rail 55 . Thereby, the back bed portion 31 is maintained in a state in which the lower end is not used as a fulcrum and is not collapsed forward.

As shown in FIG. 9 , when the arm member 84 is rotated about the connecting rod 85 by the operating member 86 and the positioning member 83 is moved from one end side of the first guide groove 81 to the other end side, the positioning member 83 is pressed by the positioning member 83 . The middle part of the lift arm 78 .

Thereby, the riser arm 78 rotates toward the front surface side of the back bed portion 31 indicated by arrow W in FIG.

As a result, since the lower end of the back bed portion 31 is rotated in the direction of falling forward, the head of the user whose upper body is positioned on the back bed portion 31 is raised forward.

As described above, after the back bed portion 31 is lifted, the operating member 86 is operated to move the positioning member 83 from one end of the first guide groove 81 to the other end, whereby the back bed portion 31 can be moved forward. pour.

In addition, when the back bed portion 31 is in the downed state, if the back bed portion 31 is lifted after the operation member 86 is operated in advance to move the positioning member 83 from one end of the first guide groove 81 to the other end, the back bed portion 31 will In this lifting, the interval between the back bed portion 31 and the other end of the head-up rail 55 opposite to the back of the second lumbar bed portion 28 and back bed portion 31 is as shown in FIG. 9 from the state shown in FIG. 8 . magnified.

Thereby, as shown in FIG. 9 , the lift arm 78 is pressed by the positioning member 83 and kept in a state of rotating forward about the lift roller 79 as a fulcrum, so that the back bed portion 31 can be inclined to the front surface side.

That is, according to the above-described configuration, the back bed portion 31 can be tilted forward by operating the operating member 86 after the back bed portion 31 is driven in the ascending direction by the back lift mechanism 37 .

Not only that, when the back bed portion 31 is in a reclined state, if the operating member 86 is operated in advance to move the positioning member 83 from one end of the first guide groove 81 to the other end, the back bed portion 31 is lifted up and This may cause the back bed portion 31 to fall forward in conjunction with the lifting.

According to the bed apparatus having such a configuration, the working shaft 56 and the wire rod for rotating the pair of side back portions 33 provided on both sides of the central back portion 32 of the back bed portion 31 forward as the back bed portion 31 is raised Members such as 59 and the pressing member 66 can be provided on the back side of the deck body 25, regardless of the operation, arrangement, and the like of the members constituting the back lift mechanism 37 for driving the back bed portion 31 up and down.

That is, the side back parts 33 provided on both sides of the central back part 32 of the back bed part 31 can be rotated in the forward direction when the back is raised by the mechanism that has been separated from the back lift mechanism 37 .

Therefore, since the side back portion 33 can be rotated in the forward direction when the back is lifted by a mechanism that does not require relative assembly accuracy and manufacturing accuracy with the back lift mechanism 37, the mechanism can be easily manufactured and assembled.

The length of the bed frame 5 and the bed base body 25 of the bed apparatus can be changed according to the height of the user. When changing the lengths of the bed frame 5 and the bed base 25, it is necessary to adjust the length of the wire 59 for rotating the side back 33 in the forward direction when the back is lifted.

The other end portion of the wire 59 whose one end is connected to the operation shaft 56 via the arm 58 is wound around the winding shaft 63 so that the length can be adjusted. Therefore, even when the lengths of the bed frame 5 and the bed base body 25 have been changed, the lengths of the wires 59 can be changed in accordance with the length changes. Therefore, even when the lengths of the bed frame 5 and the bed base body 25 have been changed, the pair of side back portions 33 of the back bed portion 31 can be reliably rotated forward while holding the user's head when the back is lifted. .

The head-up mechanism 75 can keep the back bed portion 31 inclined forward by moving the positioning member 83 along the first guide groove 81 through the operation member 86 after the back bed portion 31 is lifted.

Not only that, if the positioning member 83 is moved along the first guide groove 81 before the back bed portion 31 is lifted, the back bed portion 31 can be lifted by the back lift mechanism 37 by moving the positioning member 83 along the first guide groove 81 in advance. The portion 31 is inclined forward.

Therefore, it is possible to incline the back bed portion 31 forward even when the back bed portion 31 is raised, or to incline the back bed portion 31 forward after raising the back bed portion 31, or to tilt the back bed portion 31 forward in accordance with the user's physical condition or the like. The back bed portion 31 is returned to the original state where the back bed portion 31 is not inclined, and the state in which the back bed portion 31 is inclined is selected. Thereby, the usability of the bed apparatus is improved.

The side lift mechanism 74 can be operated by driving the back bed portion 31 in the lifting direction, and the head-up mechanism 75 can be operated by setting the position of the positioning member 83 relative to the first guide groove 81 .

That is, the side lift mechanism 74 and the head-up mechanism 75 can be operated separately or simultaneously. Therefore, the side lift mechanism 74 and the head-up mechanism 75 can be used separately or simultaneously according to the state of the user's physical strength and the like, thereby further improving the convenience of the bed apparatus.

In addition, in the above-described first embodiment, the first lumbar bed portion 27 and the second lumbar bed portion 28 are provided on the bed body 25 , and the back bed portion 31 is connected to the second lumbar bed portion 28 . However, if the first lumbar bed portion 27 and the second lumbar bed portion 28 cannot be provided in the bed base body 25 , the back bed portion 31 may be connected to the fixed bed portion 26 .

In addition, the pair of side back parts 33 provided on both sides of the central back part 32 of the back bed part 31 may be divided into a plurality of parts in the up-down direction.

In addition, the bed apparatus may not include the first lumbar bed portion 27 and the second lumbar bed portion 28 . In this case, the center back portion 32 of the back bed portion 31 may be rotatably attached to the fixed bed portion 26 . In short, any structure may be used as long as the center back portion 32 is rotatably provided directly or indirectly on the fixed bed portion 26 .

Next, a second embodiment of the present invention will be described with reference to FIGS. 11 to 15 . In addition, the same code|symbol is attached|subjected to the same part as 1st Embodiment, and description is abbreviate|omitted.

FIG. 11 shows the back side of the back bed portion 31 , the first lumbar bed portion 27 , the second lumbar bed portion 28 , and the fixed bed portion 26 of the deck body 25 , similarly to FIG. 6 of the first embodiment.

In the first embodiment, in order to constitute the head-up mechanism 75, the head-up rail 55, the head-up arm 78, the head-up guide portion 76, and the like having one end fixed to the lower surface (rear surface) of the first lumbar bed portion 27 are provided. In the embodiment, the riser mechanism 75 is configured without using the riser rail 55 , the riser arm 78 , the riser guide portion 76 , and the like. In addition, in 2nd Embodiment, the code|symbol which shows a head mechanism is set to 75A.

Hereinafter, the head mechanism 75A of the second embodiment will be described. A working shaft 56 is provided on the upper part of the back surface of the center back 32 . The work shaft 56 is rotatably held by a pair of holders 57 . As shown in FIGS. 11 and 14 , at both ends of the operation shaft 56 , one end parts of a pair of plate-shaped mounting arms 101 are fixed in a state of being orthogonal to the axis of the operation shaft 56 .

At the other end of the attachment arm 101 , one end of the movable arm 102 , which is also in the shape of a belt plate, is rotatably connected by a connection shaft 103 . At the other end of the movable arm 102 , as shown in FIG. 13 , a roller-shaped work member 104 is rotatably supported by a support shaft 105 .

The working member 104 and the support shaft 105 constitute restricting means that restricts the angle at which the back bed portion 31 is inclined forward, as will be described later. In addition, the restricting means may be constituted only by the fulcrum 105 .

The working member 104 is arranged to be movable within the back lift rail 53 . The support shaft 105 is movably inserted through the long hole 106 formed in the end of the back lift rail 53 along the longitudinal direction.

As shown in FIG. 12 , long holes 106 are formed at both ends in the longitudinal direction of the pair of back lift rails 53 . With such a configuration, the pair of back lift rails 53 can be used without restricting their positioning relative to the vertical direction. In addition, the long hole 106 may be substantially provided only at the end portion (upper end portion) of the back lift rail 53 on the back bed portion 31 side.

The movable arm 102 can be fixed so as not to rotate by the lock mechanism 108 in a linear state with respect to the mounting arm 101 . 13 (a), (b) and FIG. 14 (a), (b), (c), the locking mechanism 108 has a pair of movable pieces 111, the pair of movable pieces 111 One end is rotatably attached to the middle portion in the longitudinal direction of the pair of left and right attachment arms 101 via a support shaft 110 . One end and the other end of the locking lever 112 are respectively fixed to the other ends of the pair of movable pieces 111 .

As shown in FIGS. 12( a ) and 13 ( a ), on one side in the width direction of one end portion of the movable arm 102 , that is, the distal end of the position connected to the mounting arm 101 via the connecting shaft 103 On one side, a concave engaging portion 113 is formed.

As shown in (a) of FIG. 12 and (a) of FIG. 13 , the movable arm 102 is rotated from the state of being bent relative to the mounting arm 101 to (b) of FIG. 12 and (b) of FIG. 13 . b) is almost straight with respect to the mounting arm 101, the locking lever 112 is rotated together with the movable piece 111 using the fulcrum 110 supporting the movable piece 111 as a fulcrum, and is elastically engaged with a pair of movable pieces 111. The engaging portion 113 of the boom 102 .

As a result, as shown in FIGS. 12( b ) and 13 ( b ), the movable arm 102 is held in a state almost linear with respect to the mounting arm 101 without being able to rotate.

When the mounting arm 101 and the movable arm 102 are held in a straight line by the locking mechanism 108 from the bent state, the center back portion 32 of the back bed portion 31 is pressed forward via the operating shaft 56 to which the mounting arm 101 is mounted.

Thereby, from the state shown in FIG. 12( a ) and FIG. 13( a ), the operating shaft 56 is provided on the back bed portion 31 on the back side, as shown in FIGS. 12( b ) and 13 . As shown in (b), the lower end of the connecting portion 29 pivotally connected to the second lumbar bed portion 28 is used as a fulcrum to tilt forward.

At this time, the working member 104 provided at the other end of the movable arm 102 and engaged with the long hole 106 of the back lift rail 53 moves toward the back lift rail 53 (b) in FIG. 12 in response to the tilting of the center back 32 move in the direction of the upper end.

Further, the support shaft 105 provided with the working member 104 is engaged with the long hole 106 of the back lift rail 53 . Therefore, the back bed portion 31 is prevented from falling forward by more than the length of the mounting arm 101 and the movable arm 102 held in a linear shape by the locking mechanism 108 .

That is, the working member 104 restricts the inclination angle of the back bed portion 31, that is, prevents the central back portion 32 from being too inclined forward.

In this way, the head mechanism 75A of the second embodiment is used to attach the attachment arm 101 and the movable arm 102 to the operating shaft 56 used for the side lift mechanism 74 to be described later.

Furthermore, the back lift rail 53 holds the working member 104 via the fulcrum 105 inserted into the long hole 106 , and in the lock mechanism 108 , the movable arm 102 rotatably coupled to the attachment arm 101 is held by the lock lever 112 into a non-rotatable and linear shape.

Therefore, according to the head mechanism 75A in the present embodiment, reduction in the number of components and simplification of the configuration can be achieved. Moreover, since the back bed portion 31 can be tilted or released from the tilted state only by operating the lock mechanism 108, the operation thereof is also easy.

On the other hand, the side lift mechanism 74 in the second embodiment has almost the same configuration as that in the first embodiment. That is, as shown in FIG. 11 , the side lift mechanism 74 has a wire 59 as a transmission member that generates tension when the back bed portion 31 of the deck body 25 is driven in the lifting direction by the back lift mechanism 37, and passes the The tension rotates the working shaft 56 in a predetermined direction.

The wire 59 is inserted into the outer tube 121 . One end of the wire 59 is attached to a mounting member 122 , and the mounting member 122 is provided on the lower surface of the first lumbar bed portion 27 . One end portion of the wire 59 is engaged with the first roller 124 rotatably provided on the first holder 123 provided on the lower surface of the fixed bed portion 26 to change the direction.

One end of the outer tube 121 is fixed to the first holder 123 . That is, one end of the wire 59 is exposed from the outer tube 121 between one end of the outer tube 121 and the attachment 122 .

The middle part of the outer tube 121 is greatly loosened and bent, and the middle part is held by the clip 125 provided on the back surface (lower surface) of the second lumbar bed part 28 . The other end of the outer tube 121 is fixed to the second holder 127 provided on the upper end of the center back 32 .

The other end of the wire 59 drawn out from the other end of the outer tube 121 is engaged with the second roller 128 , and the second roller 128 is rotatably supported by the second holder 127 . The distal end of the wire rod 59 is coupled to an arm 58 serving as an attachment member, and the arm 58 is provided at the center portion in the longitudinal direction of the actuating shaft 56 .

Thereby, the back lift arm 45 is driven in the lift direction by the back lift mechanism 37 shown in FIG.

Then, since the back bed portion 31 is lifted up in conjunction with the back lift rail 53, tension is generated in the wire 59 by this lift. When tension is generated in the wire rod 59, the operation shaft 56 is rotated in a predetermined direction by the tension.

As shown in FIGS. 14( a ) to ( c ), at both ends of the operation shaft 56 , the pressing members 66 are provided so that the angle can be changed with respect to the circumferential direction of the operation shaft 56 . Then, when the back bed portion 31 is driven in the lifting direction and the actuating shaft 56 is rotated by the wire rod 59 , the pressing member 66 rotates in a predetermined direction together with the actuating shaft 56 and presses the back surfaces of the pair of side back portions 33 .

As a result, the pair of side backs 33 are displaced from the non-operating position where they are not rotated forward to the operating position where they are pressed by the pressing member 66 and are rotated forward. Such a configuration is the same as that of the first embodiment.

In addition, as shown in FIG. 11 , a flat concave portion 33 a is formed on the back surface of the side back 33 on the back surface where the pressing member 66 rotates, so that the pressing member 66 can be smoothly rotated.

The wire rod 59 serving as a transmission member is inserted through the outer tube 121 . Therefore, when tension is generated in the wire rod 59 at the time of lifting the back, the wire rod 59 moves smoothly compared to the case where the wire rod 59 is not inserted through the outer tube 121 .

Both the outer tube 121 and the wire rod 59 have a length that allows the intermediate portion to be slack. Therefore, even if the length from the fixed bed portion 26 to the back bed portion 31, for example, the length dimension of the back bed portion 31, is increased according to the height of the user, it is possible to cope with the different lengths by slack.

That is, the side lift mechanism 74 having the above-described configuration can cope without changing the lengths of the outer tube 121 and the wire rod 59 even when the length of the bed body 25 has been changed, as in the first embodiment.

In the head-up mechanism 75A of the bed apparatus according to the second embodiment configured in this way, when the movable arm 102 is rotated linearly with respect to the attachment arm 101, and in this state, the movable arm 102 cannot be locked by the lock mechanism 108 When rotated, the central back portion 32 of the back bed portion 31 can be maintained in a state inclined forward as shown in FIG. 12( b ) and FIG. 13( b ). In addition, at this time, the pair of side backs 33 are also inclined integrally with the central back 32 .

Thereby, since the user's head can be supported by the inclined center back 32 in a state where the user's head is raised, there is an advantage that, for example, the user can maintain a posture in which it is easy to eat.

In addition, the support shaft 105 supporting the working member 104 is engaged with the long hole 106 of the back lift rail 53 . Therefore, when the back bed portion 31 is tilted forward in a state where the movable arm 102 is locked relative to the mounting arm 101 by the locking mechanism 108, the back bed portion 31 can be prevented from tilting forward by the mounting arm 101 and the movable arm 102. above the length dimension.

That is, not only can the back bed portion 31 be inclined forward at a predetermined angle, but also excessive inclination can be prevented.

On the other hand, if the locked state in which the movable arm 102 is locked by the locking mechanism 108 is released, the center back 32 can be held in a position not inclined forward as shown in (a) of FIG. 12 and (a) of FIG. 13 . state. At this time, the central back 32, that is, the back bed portion 31 can be prevented from shaking in the inclined direction by the wire 59 even if an external force is applied or the like.

Like the first embodiment, the side lift mechanism 74 positions the pressing member 66 in either the operating position or the non-operating position. Further, when lifting the back bed portion 31, the side lift mechanism 74 is set to a state in which it rotates while pressing the back surface of the side back portion 33 and rotates forward, and a state in which it does not rotate and does not press the side back portion 33. either.

Therefore, when the back bed portion 31 is driven in the raising direction, it is possible to selectively operate the head mechanism 75A and the side lift mechanism 74 . That is, since either one or both of the head-up mechanism 75A and the side lift mechanism 74 can be operated, it can be used in a state according to the user's desire.

In addition, regardless of whether the back lift mechanism 37 is driven to raise the back bed portion 31 or not, the center back portion can be locked by the locking mechanism 108 by maintaining the movable arm 102 in a locked state in which the movable arm 102 cannot be rotatably locked to the mounting arm 101. 32 is maintained in a forwardly inclined state.

In the above-described first and second embodiments, the example in which the wire rod is used for the transmission member as a means for rotating the working shaft when the back is lifted has been shown. As the transmission member, a configuration capable of rotating the work shaft by a rotational drive source such as a transmission motor may be used instead of the wire rod. Further, the rotary drive source can also work in conjunction with the back-lifting mechanism when the back-bed portion is back-lifted.

Description of reference numerals

5: bed frame; 11: main body frame part; 12: adjustment frame; 25: bed base body; 26: fixed bed part; 27: first lumbar bed part; 28: second lumbar bed part; 29: connecting part; 31: Back bed; 32: Central back; 33: Side back; 35: First leg bed; 36: Second leg bed; 37: Back lift mechanism; 38: Drive; 56: Working shaft; 58: Arm (installation member); 59: wire (transmission member); 66: pressing member; 69: stopper member; 72: mounting shaft; 73: holding member; 74: side lift mechanism; 75: head mechanism; 76: head guide ; 79: head-up roller; 81: first guide groove; 82: second guide groove; 83: positioning member; 84: arm member; 86: operating member; 101: mounting arm; 102: movable arm; 104: working member (restriction unit); 110: fulcrum (restriction unit); 108: locking mechanism; 112: lever for locking.

Claims (12)

1. A bed device is characterized in that the bed device is provided with:

a bed frame;

a bed board body including a fixed bed portion fixed to the bed frame and a back bed portion having a center back portion and a pair of side back portions and provided to be rotatable with respect to the fixed bed portion, the pair of side back portions being connected to both sides of the center back portion so as to be rotatable in a forward direction;

a back lifting mechanism for raising and lowering the back bed portion of the bed plate;

a working shaft rotatably supported by a rear surface of the center back portion such that an axis thereof is along a width direction of the center back portion;

a mounting member provided at a middle portion of the working shaft;

a transmission member having one end fixed to the mounting member and the other end fixed to a portion that generates tension when the back bed unit is driven in a lifting direction by operating the back lifting mechanism, the transmission member rotating the operating shaft in a predetermined direction by the tension; and

and a pressing member provided at both end portions of the working shaft so as to be capable of changing an angle with respect to a circumferential direction of the working shaft, and configured to position the pair of side back portions at either one of a working position where the pair of side back portions rotate forward and a non-working position where the pair of side back portions do not rotate forward when the back bed portion is driven in a lifting direction and the working shaft is rotated by the transmission member.

2. The bed arrangement of claim 1,

the mounting member is in the form of an arm having one end connected to the operating shaft and the other end protruding radially outward of the operating shaft, and one end of the transmission member is connected to the other end of the mounting member.

3. The bed arrangement of claim 1,

the transmission member is arranged to be adjustable in length,

the bed frame has a structure capable of adjusting the length,

the length of the transmission member is set according to the length of the bed frame.

4. A bed device is characterized in that the bed device is provided with:

a bed frame;

a bed plate body having a center back portion and a back bed portion including a pair of side back portions rotatably connected to both sides of the center back portion in a forward direction;

a back lifting mechanism for raising and lowering the back bed portion of the bed plate;

a working shaft rotatably supported by a rear surface of the center back portion such that an axis thereof is along a width direction of the center back portion; and

and a pressing member provided at both end portions of the working shaft so as to be capable of changing an angle with respect to a circumferential direction of the working shaft, and configured to position the pair of side back portions at either one of a working position where the pair of side back portions rotate forward and a non-working position where the pair of side back portions do not rotate forward when the back bed portion is driven in a lifting direction and the working shaft is rotated.

5. The bed arrangement of claim 1 or 4,

the pressing member is provided to the operating shaft so as to be positionable in the operating position and the non-operating position by a positioning mechanism,

the positioning mechanism includes:

a support shaft inserted into an end of the operating shaft so as to be rotatable and movable in an axial direction;

a stopper member provided at a front end portion of the support shaft;

an attachment shaft provided on the stopper member so that an axis thereof is inclined at a predetermined angle with respect to an axis of the operating shaft, and provided at a tip thereof with the pressing member; and

and a holding member that is provided at an end of the working shaft and positions and holds the pressing member provided at the other end of the mounting member at the working position when the back bed portion is driven in a lifting direction by the back lifting mechanism.

6. The bed arrangement of claim 1 or 4,

the member constituting the mechanism for driving the side back portion of the back bed portion forward when the back bed portion is driven in the lifting direction does not overlap with the member constituting the back lifting mechanism.

7. A bed device is characterized in that the bed device is provided with:

a bed frame;

a bed board body including a fixed bed portion fixed to the bed frame, a waist bed portion provided to be rotatable with respect to the fixed bed portion, and a back bed portion;

a back lifting mechanism for raising and lowering the waist bed portion and the back bed portion of the bed plate;

a head-up guide portion provided at an end portion of the back surface of the back bed portion on the side of the lumbar bed portion, and having an arc-shaped first guide groove formed at a side edge thereof;

a head-up rail having one end fixed to the waist bed portion and provided over the back sides of the back bed portion and the waist bed portion;

a head-up arm having one end pivoted to the head-up guide portion and the other end provided with a head-up roller rotatably engaged with the head-up rail, the head-up arm being configured to rotate the head-up roller along the head-up rail to rotate together with the head-up guide portion about the one end as a fulcrum, thereby rotating the bed-back portion forward relative to the waist bed portion; and

and a positioning member having an end portion inserted into the first guide groove and selectively positioned at a first position where the back bed unit is rotated forward without the head-up arm when the positioning member is positioned at one end of the first guide groove and at a second position where the back bed unit is rotated forward by the head-up arm when the positioning member is positioned at the other end of the first guide groove.

8. The bed arrangement of claim 7,

an arc-shaped second guide groove arranged side by side with the first guide groove is formed on the side of the head-up guide portion, and an arm member is provided, one end of which is pivoted to the side surface of the head-up guide portion and the other end of which is connected with the end of the positioning member,

an operating member that moves the positioning member between one end and the other end of the first guide groove by rotating the arm member is provided in the second guide groove.

9. The bed arrangement of claim 7,

when the back bed portion is in a state of being laid down before being driven in a lifting direction by the back lifting mechanism, the back bed portion can be laid down forward in conjunction with lifting of the back bed portion by the back lifting mechanism by positioning the positioning member at the second position of the first guide groove in advance.

10. A bed device, characterized in that the bed device is provided with:

a bed frame;

a bed plate body having a waist bed portion with one end rotatably provided to the bed frame, and a back bed portion with one end rotatably connected to the other end of the waist bed portion;

a back lifting mechanism which has a back lifting arm and a back lifting rail, and which undulates the back bed portion of the bed plate body, the back lifting arm being rotated in a rising direction from a state in which the other end is laid down with one end as a fulcrum, and a back lifting roller being provided on the other end side, one end portion of the back lifting rail being attached to the lower surface side of the waist bed portion and being rotatably engaged with the back lifting roller; and

a head raising mechanism that rotates the back bed portion forward when the back bed portion of the bed plate is driven in a raising direction by the back raising mechanism,

the head-up mechanism includes:

a working shaft supported by the back surface of the back bed portion so as to be rotatable with its axis along the width direction of the back bed portion;

a mounting arm having one end non-rotatably mounted to the working shaft;

a movable arm having one end rotatably coupled to the other end of the mounting arm;

a lock mechanism that holds the movable arm so as not to rotate relative to the mounting arm and tilts the back bed forward with a lower end as a fulcrum; and

and a restricting unit that is provided at the other end of the movable arm so as to be movable along the other end of the back lifting rail, and that restricts the forward tilting angle of the back bed unit when the back bed unit is held by the lock mechanism in a state of tilting forward with a lower end as a fulcrum.

11. The bed arrangement of claim 10,

the back bed part is provided with a central back part and a pair of side back parts which are rotationally connected with the two sides of the central back part in the forward direction,

the bed device further includes a side lifting mechanism that rotates the pair of side back portions forward when the back bed portion is driven in a lifting direction by the back lifting mechanism,

the side lift mechanism comprises:

a transmission member that rotates the working shaft in a predetermined direction when the back bed portion of the bed plate body is driven in a lifting direction by the back lifting mechanism; and

and a pressing member provided at both end portions of the working shaft so as to be capable of changing an angle with respect to a circumferential direction of the working shaft, and configured to position the pair of side back portions at either one of a working position where the pair of side back portions rotate forward and a non-working position where the pair of side back portions do not rotate forward when the back bed portion is driven in a lifting direction and the working shaft is rotated by the transmission member.

12. The bed arrangement of claim 11,

the bed device is configured such that the raising mechanism and the side lift mechanism can be selectively operated in accordance with driving of the back bed portion in a lifting direction by setting whether or not the movable arm is integrated with the attachment arm by the lock mechanism and setting the pressing member to either one of the operating position and the non-operating position.

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