WO1997002923A1

WO1997002923A1 - Index table and operating tool therefor

Info

Publication number: WO1997002923A1
Application number: PCT/JP1995/001381
Authority: WO
Inventors: Isami Tanaka; Tsutomu Yasue
Original assignee: Tokiotekku Co., Ltd.
Priority date: 1995-07-12
Filing date: 1995-07-12
Publication date: 1997-01-30

Abstract

A table for indexing a rotary table on which a work is loaded and mounting and dismounting a positioning coupling by means of a tool head of a machine tool. Three-piece or two-piece coupling (50) performs indexing and positioning of a rotary table (1). A screwing action of a screw (7) and a wedging action of a cam disk (71) perform engagement and disengagement of engaging teeth (11) of the three-piece coupling and rotary teeth (5) of the two-piece coupling. When the screw (7) having a large diameter is used, a cutting reaction force transmitted from the coupling (50) can be distributed over the entire screw to avoid stress concentration. Further, since the screw having a small number of threads can serve the purpose, a table casing (17) can be made thin. When the cam disk (71) is used, friction between it and a cam roller (76) makes rolling friction, so that a small force can perform engagement and disengagement of the coupling (50) and a manual operation is made possible.

Description

Index table and its operating tools

The present invention relates to an index table for machining a work, and more particularly to an apparatus for indexing a table and fitting and unloading an index positioning force pulling by receiving a driving force from a machine tool. Background art

In order to perform multi-sided machining of a workpiece in one setup operation, it is widely used to mount the workpiece on an index table and process it. A general index table performs indexing of a table manually or by hydraulic pressure, but an index table that performs indexing using movement of a tool head of a machine tool is also known. A conventional index table of this type is disclosed by the present applicant in Japanese Patent Application Publication No. 185,351 / 1993. This device is shown in FIGS. 19 and 20. The operation rod 27 is supported on the table case 17 of the rotary table 1 so that it can move freely in the axial direction and can rotate freely. A tool handle 26 provided with an engagement notch 39 at a part of the circumference at one end is fixed. Then, an operation tool 44 having a shaft 45 fitted into the engagement notch 39 and two flanges 4664 sandwiching the tool handle 26 is attached to a tool head of a machine tool. By engaging the operation tool 44 with the tool handle 26 and operating the tool head with the NC device on the machine tool side, the operation 扦 27 is rotated and moved in the axial direction, and the rotary table is rotated. The indexing of 1 and the positioning force coupling 50 are disengaged.

To index the rotary table 1, a worm 32 is attached to the operating rod 27 so that it can move in the axial direction and cannot rotate relative to each other.The worm wheel 19, which is rotationally connected to the rotary table 1, is connected to the worm 32. By rotating, the rotation of operation 扦 27 can be rotated 9501381 Converts to the index rotation operation of Table 1. At this time, make the minimum indexing pitch of the rotary table 1 correspond to one rotation of the operating rod 27, and the engaging notch 39 of the tool handle 26 is always constant regardless of the indexing position of the table 1. The operation tool 4 and the tool handle 26 can always be easily engaged with each other.

The coupling 50 for fixing the rotary table 1 at a predetermined indexing position is composed of turning teeth 5 fixed to the rotating table 1 and fixed teeth 23 fixed to the table case 17. The revolving tooth 5 and the fixed tooth 23 are disengaged by moving in the direction. To move the table 1 forward and backward, a feed screw 51 is attached to the table case 17 so that it cannot be moved in the axial direction and is rotatably mounted on the table case 17 behind the pivot shaft 2 of the table 1. This is performed by screwing a nut member 52 which is mounted so as to be movable in a non-rotatable and non-rotatable manner and transmits the axial movement of the nut member 52 to the turning shaft 2. To rotate the feed screw 51, the rack 53 provided on the operating rod 27 is combined with the binion 54 supported by the table case 17, and the pinion 54 is moved by moving the operating rod 27 in the axial direction. It rotates by transmitting the rotation to the feed screw 51 via the toothed belts 55 and 56. Disclosure of the invention

As shown in FIGS. 1 to 5, the index table described in claim 1 of the present application is a table case 1 in which a rotary table 1 is rotatable around its rotation axis 2 and cannot be moved in a direction 轴. The rotating table 1 is provided with turning teeth 5 and the table case 17 is provided with fixed teeth 23, and the non-rotatable screw ring 9 screwed to the screw 7 rotatably mounted on the outer periphery of the turning 轴 2 An engaging tooth 11 is provided for engaging and disengaging the revolving tooth 5 and the fixed tooth 23 at the same time. An operation rod 27 provided with a tool handle 26 at one end of a table case 17 is provided so as to be movable and rotatable in the axial direction. The rotation of this operation 扦 27 is transmitted to the screw 7 via the linear rotary motion conversion mechanism 37, 24, and the engaging teeth 11 attached to the screw ring 9 are advanced and retracted to rotate the rotary tooth. —Bull 1 The rotation of the operating rod 27 is transmitted to the rotary table 1 and the rotation indexing operation is performed.

Rotation and axial movement of the operating rod 27 are performed by engaging the operating tool 44 attached to the tool head of the machine tool with the tool handle 26 and using the NC control device of the machine tool for the tool head. Is performed by moving.

As shown in FIGS. 7 and 8, the index table according to claim 2 of the present invention comprises a table case 17 in which a rotary table 1 is rotatable around its turning pot 2 and axially movable. The cam disk 71, which is capable of revolving relative to the swivel かつ and cannot move in the axial direction, is provided so as not to rotate with respect to the table case 17, and is provided in the spiral groove 70 of the cam disk 71. A cam ring 7 4 provided with a cam roller Ί 6 to be fitted is provided on the table case 17 so as to be non-movable and rotatable in one direction. Provided on the table case 17, the table case 17 has a tool handle 26 provided at one end and supports an operation rod 27, which can be moved and rotated freely in one direction. Camlin via the oscillating motion conversion mechanism 37 Rotate 7 4 to convert the rotation of the cam ring 7 4 into the axial movement of the cam disk 7 1 via the cam roller 76, advance and retreat the swivel axis to fix and release the turntable 1. The rotation of the operating lever 27 is transmitted to the rotary table 1 to perform the rotation indexing operation.

4. The index table according to claim 3, wherein the rotary table 1 is provided on the table case 17 so as to be rotatable around the rotary shaft 2 and immovable in the axial direction, and a cam disk coaxial with the rotary shaft. 7 1 is provided so as to be non-rotatable and axially movable with respect to the table case 17, and a cam ring 7 4 protruding from a cam roller 7 6 fitted into the spiral groove 70 of the cam disk 7 1 is attached to the table case 1. 7 is provided so that it cannot be moved in the axial direction and is rotatable. Rotating table 1 is provided with revolving teeth 5 and table case 17 is provided with fixed teeth 23. Is provided on the cam disk 7 1, and the table case 17 supports an operating rod 27 having a tool handle 26 at one end so as to be movable and rotatable in the wheel direction. Linear movement The rotation is transmitted through the dynamic motion conversion mechanism 37 to rotate the cam ring 74, and the rotation of the cam ring is converted into the axial movement of the cam disk 71 via the cam roller 76 and converted to the cam disk 71. The attached engaging teeth 11 are advanced and retracted to fix and release the rotary table 1, the rotation of the operating rod 27 is transmitted to the rotary table 1, and the rotation indexing operation is performed. is there.

As shown in FIGS. 15 to 18, the index table according to claim 4 of the present invention is such that the rotary table 1 is rotatable around the turning shaft twice in the table case 17 and the sleeve direction. The cam disk 71 is provided so as to be able to move slightly, and the cam disk 71 is provided so as to be rotatable relative to the rotation axis and movable in the 轴 direction. The cam surface 104 of the cam disk 104 is urged against the cam roller 76 by a pressure mechanism 106 protruding from the case 1 、 and sandwiching the cam roller 76, and the rotating teeth 5 And fixed teeth 23 are provided on the table case 17, and the engaging teeth 11 engaged and disengaged with the two 5, 23 simultaneously are pushed in the axial direction by the cam disk, and are moved with respect to the table case 17. Provided on the non-recoverable slide disk 12, the slide disk 12 and the cam disk 7 1 are connected to the first spring 9 7 The revolving teeth 5 are urged toward the engaging teeth by a second spring 12 1 interposed between the urging mechanism 106 and the revolving shaft 2. The first panel is set to twice the spring force of the second panel, and the operation rod 27 with the tool handle 26 at one end at the top of the table case 17 can be moved and rotated freely in the 轴 direction. The operation of the operating rod 27 is converted to the rotational motion of the cam disk 71 by the linear oscillating motion converting mechanism 37, and the rotational operation of the cam disk 71 is further converted to the cam roller. The cam disk 7 is converted to axial movement of the cam disc 7 1 by 6 and the slide disc 12 is moved forward and backward to fix and release the rotary table 1. And performs the rotation indexing operation.

The index table according to claim 5 of the present invention is arranged such that the rotary table 1 is provided on the table case 17 so as to be rotatable around its pivot 轴 2 and movable in the axial direction, and is rotatable with respect to the table case 17.に Screw on screw 7 mounted immovably A non-rotatable screw 9 is provided so as to be rotatable relative to the pivot shaft 2 and cannot move in the axial direction. An operation rod 27 with a tool handle 26 provided at one end of the table case 17 is axially movable and rotatably supported on the case 17, and the operation rod 27 is linearly moved in the axial direction. It is transmitted to the screw 7 via the rotary motion conversion mechanism 37, 24, and the turning shaft mounted on the screw ring 9 is advanced and retracted to fix and release the rotary table 1, and the rotation of the operation rod 27 is performed. It is characterized in that it is transmitted to the turntable 1 and its rotation indexing operation is performed.

As shown in FIGS. 9 and 10, the index table according to claim 6 of the present invention comprises a table case 17 and a rotary table 1 rotatably and axially movable about a rotation axis 2 thereof. A cam ring provided freely and a cam disk 71 is provided so as to be rotatable relative to the revolving shaft and immovable in the axial direction, and a cam roller 76 protrudingly provided in the spiral groove 70 of the cam R plate 71. 7 4 is fixed to the table case 17, and the rotating table 1 is provided with the turning teeth 5, and the fixed teeth 23 corresponding to the turning teeth are provided in the table case 17, and a tool handle is provided at an upper end of the table case 17 at one end. The operation rod 27 having the operation rod 26 is rotatably supported in the 铀 direction so as to be freely rotatable, and the axial movement of the operation rod 27 is converted into the rotation of the cam disk 71 by the linear oscillating motion conversion mechanism 37. Convert the cam disk 71 into a rotating motion The rotation of the rotary table 1 is fixed and released by converting the rotation of the cam disk 7 1 into the axial movement of the cam disk 7 1 and the rotation of the rotary table 1 by the roller 7 6. It is characterized by performing a rotation indexing operation.

As shown in FIGS. 11 to 14, the index table described in claim 7 is the same as the index table described in claims 2, 3, 4, or 6, except that the table case 1 A screw rod 81 parallel to the operating rod 27 is mounted on the control rod 27 so that it cannot move in the 轴 direction. An engaging portion 90 for connecting the manual handle 91 to the distal end of the screw rod 81 is provided. As shown in Fig. 6, the index table operating tool according to claim 8 is used to index the index table according to claim 1, 2, 3, 4, 5, 6, or 7. A spring member 64 that absorbs a position error of the advance end of the advance / retreat member 9, 71 that engages and disengages the force bubling 50 that performs positioning is provided in the operating tool, In the index table according to claims 1 to 6, the engagement teeth 11 or the turning teeth 5 for indexing and positioning the rotary table are advanced and retracted by using a screw or a wedge action of a screw or a cam disk. As a result, the indexing position can be firmly fixed, and the concentration of the cutting reaction force can be avoided.

According to the first aspect of the present invention, a screw 7 is attached to the outer periphery of the rotating shaft 2 of the rotary table 1 so as to be rotatable and immovable in the axial direction, and is engaged with a screw ring 9 which is moved forward and backward by the screw. Since the teeth 11 are mounted, the screw described in claim 5 is mounted on the table case 17 so that the screw 7 is rotatably and axially immovable, and the screw ring 9 which moves forward and backward by the screw is mounted on the table case 17. Since the rotary shaft 2 of the rotary table having the rotary teeth 5 is provided so as to be relatively rotatable and unable to move in the axial direction, large-diameter screws and screw rings 9 can be used. Therefore, the cutting reaction force against the peak can be dispersed throughout the screw, and the concentration of stress can be avoided. In addition, even if the table case 17 is made thinner, the swivel 2 can be made longer, which is suitable for the structure of a large index table on which a heavy object is mounted. On the other hand, in the case of claims 2, 3, 4 and 6, a cam disk is mounted on the table side opposite to the turning 轴, and the cam disk 71 or the cam ring 74 engaged with the cam disk is turned. As a result, the large-diameter cam ring 74 can receive the weight of the work and the cutting reaction force, and the life of the device can be extended as compared with the conventional device. Further, since the friction between the cam roller and the cam disk is rolling friction, it is possible to engage and disengage the coupling with a small force.According to the structure of claim 7, the boosting action of the screw rod is utilized. Thus, the force coupling can be manually disengaged. The index table described in claims 1, 3 and 4 has a three-piece force flap 50 for connecting the turning tooth and the fixed tooth 23 with the engaging tooth 11, so that the rotary table is used. There is no need to move the table 1 back and forth when the engaging teeth 11 for positioning 1 are disengaged, and it is possible to prevent chips from entering the coupling 50 and the shaft support of the rotary table. Further, the worm wheel 19 for transmitting the rotational force to the table 1 can be fixed to the pivot 2, so that the structure of the device can be simplified and the rigidity of the table can be increased. On the other hand, the index table described in claims 2, 5 and 6 has a force beading for positioning the rotary table 1 having a two-bead structure of the revolving teeth 5 and the fixed teeth 23. Since the number of points is small and the structure can be simple, the manufacturing cost can be reduced. Therefore, it is suitable for the structure of a small index table. According to the invention described in claim 8, a panel member 64 that absorbs a positional error of the advancing end of the advancing / retreating members 9 and 71 that engages and disengages the coupling is housed in the operation tool 44, and one machine tool is provided. Since the multiple tables used in the operation are operated by the same operation tool 44, the structure of the index table body can be simplified. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a sectional side view of the index table of the first embodiment, and FIG. 2 is an exploded sectional view thereof. FIG. 3 is a sectional view of a part A in FIG. FIG. 4 is a sectional view showing the operation tool and the tool handle.

FIG. 5 is a sectional plan view of the second embodiment.

FIG. 6 is a sectional view of the operation tool according to claim 8.

FIG. 7 is a cross-sectional inverted view of the third embodiment, and FIG. 8 is a cross-sectional view of a part B in FIG. FIG. 9 is a sectional side view of the fourth embodiment. FIG. 10 is a sectional view of a portion C in FIG. FIG. 11 is a sectional view of a part D in FIG.

FIG. 12 is a perspective view of the tool handle of claim 7. FIG. 13 is an explanatory view of a manual coupling / uncoupling operation. FIG. 14 is an explanatory diagram of a manual indexing and rotating operation of the rotating table. FIG. 15 is a sectional side view of the fifth embodiment at the time of coupling fitting. FIG. 16 is a cross-sectional side view when the force coupling of the fifth embodiment is detached. FIG. 17 is a perspective view showing the cam disk and the pressing disk at the time of force-pringing engagement. FIG. 18 is a perspective view showing the cam disk and the pressing disk when the coupling is detached.

FIG. 19 is a partial cross-sectional front view of the conventional device. FIG. 20 is a sectional view of a portion E in FIG. BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 to FIG. 3 show a first embodiment of the present invention. At the center of the back of the rotary table 1 on which the workpiece is mounted, a hollow revolving shaft 2 is fixed with bolts 3, and a ring-shaped circumferential groove 4 is provided at the peripheral edge of the back of the table 1. A ring-shaped turning tooth 5 is fixed to the side. A thick disk-shaped screw 7 having a small-diameter boss 7a on the table side and a large-diameter boss 7b on the opposite side of the table is rotatably fitted on the outer periphery of the revolving shaft 2 with a bearing metal 6. A screw 9 is screwed into the screw 7. The screw ring 9 has a plurality of through holes 8 parallel to its central axis. A slide disk 12 is slidably fitted to the small-diameter boss 7 a of the screw 7, and a ring-shaped engagement mating with the revolving teeth 5 is provided on the outer diameter front surface of the slide disk 12. Denture 1 1 is fixed. The large-diameter boss 7 b of the screw 7 is provided with teeth on the outer periphery to form a rotary gear 13.

The screw ring 9 and the slide disk 12 are connected to each other by guide bolts 14 arranged at four locations on the circumference so as to be relatively movable in the axial direction and not to be relatively rotatable. That is, the guide bolt 14 is erected on the slide disk 12, and the neck of the guide bolt slidably passes through a through hole provided in the screw ring 9. A cylindrical recess 15 coaxial with the guide bolt 14 is provided on the side surface of the screw ring 9 on the side of the slide disk, and the screw 16 is provided in the recess by a disc spring 16 interposed. The ring 9 and the slide disk 12 are urged in the separating direction.

The countersink 16 has a gap between the engaging teeth 11 and the fixed teeth 23 and the turning teeth 5 described later. It is provided for the purpose of combining. That is, it is only necessary to accurately define the advance position of the screw ring 9, but since adjustment of the rotation angle of the screw 7 is troublesome, a certain tolerance is provided by interposing the flat panel 16. Therefore, even if the advance position of the screw 9 is slightly shifted, the engagement between the engaging teeth 11 and the fixed teeth 23 and the turning teeth 5 is completely guaranteed.

The revolving shaft 2 protrudes from the large-diameter boss 7 b end of the screw 7, is supported by a bearing 18 of a table case 17, and passes through the bearing 18 to the opposite side. A worm wheel 19 is fixed with a screw 21 to the shaft end protruding from the shaft. The receiving part 18 and the screw 7 of the table case 17 are sandwiched between the thrust part 6a of the receiving metal 6 and the foam wheel 19, and the screw 7 is turned around the turning shaft 2. Can move and cannot move in the axial direction.

Guy pins 22 are planted in parallel with the swivel 轴 2 at four places outside the bearing 18 of the table case 17, and the guide bin 22 is slidable in the through hole 8 of the screw ring 9. And guides the screw ring 9 so that it cannot rotate and can move in the 轴 direction. Ring-shaped fixed teeth 23 are fixed to the table mounting surface of the table case 17, and the fixed teeth 23 are accommodated on the outer diameter side of the circumferential groove 4 of the table. A fan-shaped swing gear 24 is rotatably supported on the upper part of the table case 17 by a bin 25 parallel to the swivel shaft 2, and this swing gear and the rotary gear 13 are combined. are doing.

On the upper part of the table case 17, as shown in FIG. 3, an operation rod 27 having a disc-shaped handle handle 26 fixed to the tip is mounted in a direction perpendicular to the turning shaft 2. I have. The operating rod 27 is axially slidably and rotatably mounted on the table case 17 by bearings 28 and 29, and a worm 32 is splined in the middle of the table case 17 in the axial direction. It is mounted so as to be movable and relatively unrotatable. The worm 32 is sandwiched between a bracket 33 fixed to a table case 17 and a bearing 29 to define an axial position thereof, and is combined with the worm wheel 19.

Furthermore, two flange plates 3 4 formed on the tool handle 26 side of the middle part of the operation rod 27 A connecting member 35 is fitted between the connecting member 34 and the connecting member 34 so as to be relatively rotatable, and a rod 37 is pivotally attached to the connecting member 35 with a pin 36 parallel to the pivot 2. The tip of the rod 37 is connected to the swing gear 24 by a bin 38. Therefore, the axial movement of the operating rod 27 swings the swing gear 24 and rotates the screw 7 via the rotary gear 13. With this structure, the rotation angle of the screw 7 can be increased with a small amount of movement of the operation rod 27.

An engagement notch 39 and a mating recess 41 are provided at one location on the circumference of the tool handle 26, and a handle cover 2 surrounding the outer periphery of the tool handle 26 is provided on the table case 17. The locking ball 43 attached by a spring mounted on the upper part of the handle cover 42 fits into the fitting recess 41 to define the stationary position of the tool handle 26.

FIG. 4 shows an engagement state between the operation tool 44 and the tool handle 26 attached to the tool head of the machine tool. The operating tool 4 has a shaft 45 engaged with the engagement notch 39 of the tool handle 26 and two flanges 46. 47 provided on both sides of the shaft to clamp the tool handle 26. A rib 48 is provided between the base side flange 47 and the shaft 45. The cracks 48 are provided to protect the index table from improper engagement of the engaging teeth 11 and irregular operation of the operation tool 44, and an abnormal force acts on the shaft 45. At times, the shaft 45 is broken at the crack 48, so that damage can be minimized.

Next, the rotation indexing operation of the table 1 in the index table of the first embodiment will be described. The operation tool 44 is mounted on the tool head of the machine tool by the tool changer. The operation tool 44 is engaged with the tool handle 26 by the NC control of the tool head, and the operation rod 27 is pushed in. At this time, the operation of the operating rod 27 in the axial direction causes the screw 7 to rotate approximately 180 degrees via the connecting member 35, the rod 37, the swing gear 24, and the rotating gear 13. As a result, the screw ring 9 moves (retreats) to the opposite side of the table, and the engagement between the engaging teeth 11 and the fixed teeth 23 and the turning teeth 5 is released. In this state, the tool head is revolved around the axis of the operation rod 27 and the operation 扦 27 is rotated as many times as necessary. This rotating operation is transmitted to the turning shaft 2 via the worm 32 and the worm wheel 19, and the rotary table 1 is indexed and rotated. At this time, the screw ring 9 is guided by the guide bin 22, and the screw 7 does not rotate because it is engaged with the swing gear 24. After the indexing operation is completed, by pulling back the operating rod 27, the swing gear 24 rotates in the reverse direction to move the screw ring 9 to the table side (forward movement). Then, at the forward end position of the screw ring 9, the engaging teeth 11 are simultaneously engaged with the fixed teeth 23 and the turning teeth 5, and the table 1 is fixed at a new indexing position. FIG. 5 and FIG. 6 show a second embodiment of the present invention. In the first embodiment, a screw disk 9 is provided with a slide disk 12 via a disc spring 16, and the slide disk 12 is provided with an engagement tooth 11, so that the engagement tooth 11 is Although the structure is such that the correct engagement with the fixed teeth 23 and the turning teeth 5 is ensured, in the second embodiment, the engaging teeth 11 are directly provided on the screw ring 9, and the engaging teeth 11 and the fixed teeth 2 are provided. The assurance of the connection with the rotating teeth 3 and the revolving teeth 5 is performed by the flat panel 64 installed inside the operating tool 44 shown in FIG. 6, that is, the operating tool 44 of the second embodiment has an axial A cover body 62 having a center hole 61 is fixed to the opening end of the guide hole 60, and a shaft 45 having a flange 46 at the tip is inserted into the center hole. Was screwed into a round nut 63 slidably housed in the guide hole 60, and a disc spring 64 was interposed between the lid 62 and the round nut 63. It is an elephant. In a normal state, the round nut 63 is in contact with the bottom of the guide hole 60, and the crack 48 of the shaft is located outside the lid 62. A coil spring can be used instead of the disc spring 64. The operating tool in Fig. 6 requires extra retreat compared to the operating rod in Fig. 4 when pulling the operating rod to fix the rotary table after indexing it. Need to change. The compression of the counter panel 64 when the operating tool is pulled further ensures that there is no gap between the engaging teeth 1 1 and the fixed teeth 23 and the turning teeth 5 at the forward end. FIG. 7 and FIG. 8 show a third embodiment of the present invention. In this embodiment, the rotary shaft 2 of the rotary table is provided so as to be movable in the axial direction, and the rotary tooth 5 provided on the table 1 is directly engaged with the fixed tooth 23 by moving forward and backward to determine the indexing position. The rotating shaft 2 is advanced and retracted by a cam disk 7 1 having a groove.

In FIGS. 7 and 8, a cam disk 71 having six short spiral grooves 70 on its outer peripheral surface is fitted so as to be relatively rotatable when the revolving shaft 2 substantially integral with the table 1 is turned over. Is installed. The revolving shaft 2 penetrates the cam disk 7 1, and a spring receiver 7 7 is screwed into the 轴 end projecting behind the cam disk, and a disc spring is provided between the panel receiver and the cam disk 7 1. 7 8 are interposed. The axial position of the cam disk 71 is defined by a disc spring 7.8 pressing the cam disk 71 against a step provided on the rotating shaft 2. The cam disc 71 is guided by a guide bolt 72 mounted on the table case 17 in the direction of the turning axis, and cannot rotate with respect to the table case 17.

The table case 17 is provided with a circumferential groove 73 centered on the sensitivity of the rotating shaft 2, and a cam ring 74 is rotatably fitted in the circumferential groove 73. Then, cam rollers 76 protruding at six locations on the inner periphery of the cam ring 74 are fitted into the six spiral grooves 70 of the cam disk 71, respectively. An operating rod 27 is mounted below the table case in a direction perpendicular to the swivel 、. The tip of the rod 37 linked to the operating rod 27 so that it cannot be relatively moved in the 轴 direction is a swivel axis. It is linked to the cam ring 74 by the connecting pin 36 in the direction.

A worm 32 is attached to the operation 扦 27 in the same structure as the first embodiment, and this worm is combined with the worm wheel 19. The worm wheel 19 is mounted on the revolving shaft 2 via a spline so as to be relatively movable in the axial direction and non-rotatable, and is movable relative to the table case 17 and cannot move in the 轴 direction. When 27 is pushed by the operation tool 44 (see the first embodiment) mounted on the tool head, the cam ring 74 rotates clockwise via the rod 37 in FIG. 6 moves the cam disk 7 1 to the left in FIG. Then, the revolving teeth 5 attached thereto are removed from the fixed teeth 23 fixed to the table case 17.

In this state, the table 1 is ready to be indexed, so that the operating rod 27 is rotated the required number of times. This rotating operation is transmitted to the turning shaft 2 via the worm 32 and the worm wheel 19, and the rotary table 1 is indexed and rotated. At this time, the force disk 71 is restrained by the guide bolts 72 and cannot rotate, and the cam ring 74 does not rotate. After the indexing rotation is completed, by pulling back the operating rod 27, the cam ring 74 rotates in the reverse direction to move the cam disk 71 to the counter-rotating table side. As a result, the swivel teeth 5 are engaged with the fixed teeth 23 and the table 1 is fixed at the new indexing position, and the disc springs 8 ensure the engagement between the swivel teeth 5 and the fixed teeth 23. In the present embodiment, since the rotary table 1 and the cam disk 71 are arranged on both sides of the receiving portion of the rotary shaft, when the rotary table is loaded with a heavy object, the rotary shaft has an undulation. It is unlikely to occur and can be processed with high precision.

Instead of the screws and screw rings of the first and second embodiments, the cam ring and the cam disk shown in the third embodiment can be used. The structure using the cam ring and the cam disk is suitable for high-precision heavy cutting because the rotary table is firmly fixed by the cam mechanism. If play is provided in the spiral groove, it is possible to keep the fixed force of the rotary table constant in relation to the change in the amount of movement of the operating rod. Further, since the frictional resistance between the cam roller and the cam disk is small, the operating rod can be operated with a small force. Further, the screw and the screw ring shown in the first embodiment are used in place of the cam ring and the cam disk of the third embodiment, and the positional relationship between the screw and the screw ring and the worm wheel is reversed, whereby the structure is improved. A simple and long-lasting index table can be obtained.

FIG. 9 to FIG. 14 show a fourth embodiment of the present invention. In this embodiment, similarly to the third embodiment, the turning table 2 of the rotary table is provided so as to be movable in the axial direction, and the reciprocating teeth 5 provided on the table 1 are directly engaged with the fixed teeth 23 to index. The position is determined. However, in this embodiment, six short spiral grooves are provided on the outer peripheral surface. It is mounted on the revolving shaft 2 via two needle bearings 80, 80 with a cam disc 71 1 equipped with 70. An operating rod 27 is mounted on the upper part of the table case 17 in a direction orthogonal to the rotation HI 轴 2. The connecting member 35 attached to the operating rod 27 is connected to the cam 37 via the rod 37. It is connected to a disk 7 1. A worm 32 is attached to the operating rod 27 in the same structure as that of the third embodiment, and this worm is combined with the worm wheel 19. The worm wheel 19 is mounted on the turning shaft 2 via a spline so as to be relatively movable in the axial direction and non-rotatable. The worm wheel 19 is rotatable relative to the table case 17 and is not movable in the 轴 direction.

As shown in FIGS. 911 and 10, a screw rod 81 and a guide 扦 82 are mounted above and in parallel with the operating rod 27. The connecting member 35 attached to the operating rod 27 extends to the screw rod 81 and the guide rod 82 side, as shown in Fig. 11 at a position separated from the extending part. , Two through holes 83, 85 are provided. A screw 8 81 is screwed into a nut member 84 fixed to one of the holes 83, and a guide rod 82 is inserted into the other 85. FIG. 12 is a perspective view of a tool handle at the tip of the operating rod. The tool handle 26 has a substantially oval shape in which the opposite part of the circle is cut out, and has a T-shaped groove 87 connected to the notch on both sides through the center. Notches 88, 88 are provided at the centers of the upper and lower arc portions, respectively, and through holes 89, 89 are provided at symmetrical positions near the notches. The tip of the screw rod 81 protruding from the table case 17 is loosely fitted into the upper through hole 89 when the tool handle 26 is pushed in, and the rotation of the tool handle is restricted. An axial hexagonal hole 90 is provided on the tip surface of the screw rod.

When the operating lever 27 is pulled by the operating tool 44 (see the first embodiment) fitted into the T-slot, the cam disk 71 rotates counterclockwise in FIG. 10 via the rod 37. The cam roller 76 and the spiral groove 70 move relative to each other to move the cam disk 71 to the right in FIG. 9 to move the table 1 forward. Remove from the fixed teeth 23 fixed to.

In this state, the table 1 is ready to be indexed. Rotate by number. This rotating operation is transmitted to the turning shaft 2 via the worm 32 and the worm wheel 19, and the rotary table 1 is indexed and rotated. At this time, the force disk 71 is restrained by the rod 37 and cannot rotate. When the operating rod 27 is pushed in after the indexing rotation is completed, the cam roller # 6 and the spiral groove 70 move relative to each other in the opposite direction, and the cam disk 71 moves toward the counter-rotating table side. As a result, the turning teeth 5 are engaged with the fixed teeth 23, and the table 1 is fixed at the new indexing position, and the disc springs 8 ensure the engagement between the turning teeth 5 and the fixed teeth 23. In the present embodiment, since the tool handle 26 and the operation tool 44 are connected via the T-slot 87, there are two places of engagement and disengagement between the operation tool and the T-slot in opposite directions, and the rotary table Can be set to an angle equivalent to a half turn of the operating rod.

In this embodiment, as shown in FIGS. 13 and 14, the turning table can be manually indexed. L-shaped handwheel 9 Two rods 9 2, 9 3 are provided at the end of 1, and a hexagonal head is formed at the end of the rod 9 2, and this hexagonal head is inserted into the through hole 8 of the tool handle. Fit into the hexagon hole 90 of the screw rod facing 9 and turn the screw rod 81 with the handwheel 9 1. Then, the connecting member 35 moves to the left side of FIG. 10 via the nut member 84 screwed to the screw 扦 81, and the cam disk 71 is moved to the left side of FIG. And rotate the cam disk in the axial direction to disengage the 1U tooth 5 from the fixed tooth 23. At this time, the operation 扦 27 moves in synchronization with the connecting member, and the tool handle 26 is pulled out. When the tool handle is pulled out, the tip of the screw rod 81 is detached from the through hole 89, and the tool handle 26 becomes rotatable. Then, once remove the manual handle 9 2 from the hexagon hole 9 0 of the screw rod and remove the manual handle 9 2 from the manual handle 9 1 and cut out the manual handle 9 through the notches 8 8, 8 8. Rotate 1 as many times as necessary. This rotating operation is transmitted to the turning shaft 2 via the tool handle 26, the worm 32 and the worm wheel 19, and the rotary table is indexed and rotated.

FIG. 15 to FIG. 18 show a fifth embodiment of the present invention. A slider 94 is mounted on the outer circumference of the swivel 一体 It is fitted with a barrel 6 so that it can rotate and move in the 轴 direction. A flange 95 is provided on the rotating tapel side of the slider 94, and the slider 94 is provided with a slide disk 12 and a first disc spring 97 through the first thrust 96 in order from the flange side. A cam R plate 71 is mounted via a slide block 98 having a second thrust 99, and a cam disc 71 is screwed to the other of the slider via a third thrust 101. It is fastened by napht 102. The first disc spring 97 urges the slide circle 扳 1 2 and the cam disc 711 in a direction separating from each other.

The tips of four guide bins 22 erected on the table case penetrate through through holes 103 provided in four places on the peripheral surface of the slide disk 12, and the slide disk 12 is It is movable relative to the table case 17 in the axial direction and cannot rotate relative thereto. The outer surface of the cam disk 7 1 on the side opposite to the table has a serrated cam surface 104, and this force surface is applied to the cam rollers 7 6 of the cam ring 74 fixed to the table case 17. Abuts. Guide holes 105 are provided at six locations on the circumference of the cam disk, opposite the table at the intermediate position.The guide holes are set up on the side of the table of the pressure R plate 106 in these guide holes. Guide tube 107 is slidably fitted. A guide bolt 14 is planted at the center of the guide hole 105, and its neck penetrates the guide cylinder 107, and is inserted between the bolt head and the bottom of the guide cylinder. The mounted compression coil spring 108 urges the cam disk 71 and the pressing disk in a direction in which they approach each other. Therefore, the cam disk 71 and the pressure disk 106 are urged in directions approaching each other, and rotate simultaneously around the rotation axis 2. The outer surface of the pressing disc 106 at the table side has a shallow serrated contact surface 109 with a shallow slope symmetric to the cam surface 104, and this contact surface is coaxial with the cam roller 76. Guide roller 11 1 Contacted to the peripheral surface of the roller.

The tip of the revolving shaft 2 is supported on the back plate 1 1 2 of the table case 17 with the support 1 1 3. Fixed. The operation rod 27 mounted on the upper part of the table case is provided with a power ohm 32 having the same structure as that of the first embodiment, and this worm is combined with the worm wheel 19. The rear plate has a ring-shaped protrusion that protrudes inward. The fourth thrust 115 is provided on this protruding portion, leaving a slight space from the side of the worm wheel 19 opposite the table. An adjustment nut 117 is screwed on the table side of the worm wheel 19 of the turning shaft 2. A short cylindrical member 1 19 is fitted into the adjustment nut via a metal bearing 118 provided on the outer periphery thereof, and a flange portion of the short cylindrical member is connected via a fifth thrust 122. It is in contact with the side of the pressing disk 106 opposite the table.

The fixed teeth 23, which form the three-piece positioning force bling, are fixed to the table case 17, the revolving teeth 5 are fixed to the table 2, and the engaging teeth 11 are fixed to the slide circle 212, respectively. FIG. 17 shows the state of the cam disk and the negative pressure disk when the engaging tooth is engaged with the turning tooth and the fixed tooth. From this state, the cam disk 71 and the pressure disk are shown. When 106 is turned to the right, the cam disk 71 and the pressing circle # 106 move in the approaching direction, and both stop at the position shown in FIG.

The two disc springs 9 7, 1 2 1 are provided for bringing the engaging teeth 11 into contact with the fixed teeth 23 and the turning teeth 5 with the same force. Specifically, the biasing force of the first coned disc spring 97 and the second coned disc spring 121 may be set to 2: 1. That is, based on the cam roller 76, the first counter panel 977 presses the engaging teeth 11 against the fixed teeth 23 with a force of 2 via the cam disk, and the pressing plate rotates synchronously with the cam disk. The second disc spring 1 2 1 presses the orbiting tooth 5 against the engaging tooth 1 1 with a force of 1 via the disk. Since the biasing directions of both the disc springs 97.1121 are opposite, the fixed teeth and the revolving teeth eventually engage the engaging teeth with the same surface pressure. Industrial applicability

According to the present invention, the indexing position of the rotary table can be firmly fixed, and a durable index table can be provided. If a screw is used to advance or retract the revolving teeth or the engaging teeth, a thin and large index table can be provided. If the cam R plate is used to advance or retreat the turning teeth or the engaging teeth, a small index table with good operability can be provided. Also, if the indexing position of the rotary table is fixed by a 3-bead force coupling, chips can be prevented from entering the device, and an index table with high table rigidity can be provided. If the indexing position of the rotary table is fixed with a two-piece force ring, a small index table with a small number of parts and a simple structure can be provided at low cost.

Further, in the index table using the cam disk, a manual screw 扦 is provided in parallel with the operation rod, and by connecting the screw rod and the operation 扦, the coupling can be manually inserted and removed. By adopting such a structure, the index table of the present invention can be used in a machine without NC, for example, a milling machine, a drilling machine or a boring machine. In addition, since the accuracy does not decrease even after repeated use, it is possible to provide an index table that can be used as a work table. Furthermore, if the operation tool is provided with a panel member that absorbs the position error of the advance end of the advance / retreat member, an index table with a simplified structure can be provided.

Claims

The scope of the claims

1. The rotary table (1) is provided on the table case 7) so as to be rotatable around its rotary axis (2) so that it cannot move in the head direction. The rotary table (1) is provided with the rotary teeth (5) and the table case (17). ) Is provided with fixed teeth (23), and the above-mentioned swivel teeth (5) and fixed to the non-rotatable screw ring (9) which advances and retreats with the screw (7) rotatably mounted on the outer circumference of the swivel shaft (2) The teeth (23) are provided with engaging teeth (11) which are simultaneously fitted and disengaged, and the table case Q7) is provided with an operating rod (27) provided with a handle (26) at one end. The operating rod (27) is rotated freely and axially moved by engaging the operating tool (44) mounted on the tool head of the working machine with the tool handle (26). The movement of the operating rod (27) in the 轴 direction is transmitted to the screw (7) via the linear rotary motion conversion mechanism (37, 24), and the screw ring (9

)), The rotary table (1) is fixed and released by moving the engaging teeth ι) attached and retracted, and the rotation of the operating rod (27) is transmitted to the rotary table (1) to perform the rotation indexing operation. Index table characterized by the following.

2. A rotary table (1) is provided on a table case 7) so as to be rotatable and movable around its pivot axis (2), and is a cam disc which is rotatable relative to the pivot axis and cannot move in the axial direction. A cam ring (74) having a cam roller (76) fitted into the spiral groove (70) of the cam disk (71) is provided so that the cam ring (71) cannot rotate with respect to the table case. The rotary table (1) is provided with a rotating tooth (5), and the fixed tooth (23) corresponding to the rotary tooth is provided on the table case α7). ) Supports an operating rod (27) provided with a handle (26) at one end so that it can move and rotate in one direction, and the operating tool U 4) and the tool attached to the tool head of the machine tool The operating rod (27) is rotated and axially moved by engaging the handle (26). The cam ring (74) is rotated via the linear oscillating motion converting mechanism (37) in the direction movement, and the rotation of the cam ring (74) is converted into the axial movement of the cam disk (71>) via the cam roller (76). Converts and turns swivel 進 forward and backward to fix and release the turntable (1), and transmits the rotation of the operating rod (27) to the turntable (1) to index its rotation. The index table.

3. A rotary table) is provided on the table case Q7) so as to be rotatable around its pivot axis (2) so as not to move in the head direction, and a force disk (71) coaxial with the pivot axis is provided in the table case.

A cam ring (74) provided with a cam roller (76) that fits into the spiral groove (70) of the cam disk (71) and is provided so as not to rotate and move in the axial direction with respect to 7). ) Is provided so that it cannot be moved in the axial direction and is rotatable. The rotary table (1) is provided with turning teeth (5), and the table case?) Is provided with fixed teeth (23). An engaging tooth αΐ) to be engaged and disengaged is provided on the above-mentioned force disk (操作), and an operating rod (27) having a handle (26) at one end is provided on the table case (17) in the axial direction.軸 Rotation and axial movement of the rod (27) by engaging the operation tool (44) mounted on the tool head of the machine tool with the tool handle (26) while supporting it freely and freely rolling The movement of the operating rod (27) in the axial direction is transmitted through the linear oscillating motion converting mechanism (37) to rotate the cam ring (74), and the rotation of the cam ring to the cam roller (76). Perform fixing and unlocking of engaging teeth mounted on the cam disc (71) (11) rotary table by advancing and retracting the) is converted into shaft direction movement of the cam disc (71) through

An index table characterized in that the rotation of operation (27) is transmitted to the rotary table (1) and the rotation indexing operation is performed.

4. A rotary table (1) is provided on the table case 7) so as to be rotatable around the pivot 轴 (2) so as to be able to move in the head direction, and the cam disk (71) is rotatable relative to the pivot 轴. A cam roller (76) abutting against the cam surface (104) of the cam R plate (71) protrudes from the table case 7) and is provided so as to sandwich the cam roller (76).

06) urges the cam surface (104) of the cam disk against the cam roller (76) to provide the rotary table (1) with the turning teeth (5) and the table case (17) with the fixed teeth (23). An engaging tooth ι) that engages and disengages with both (5) and (2 3) at the same time is provided on a slide disk (12) that moves synchronously with the cam disk and cannot rotate with respect to the table case or?). , Slide disk 2) and cam disk

The first panel (121) is urged by the first spring (97) in a direction away from the first panel (71), and the second panel (121) interposed between the pressing mechanism (106) and the turning shaft (2). As a result, the revolving tooth (5) is urged to the engaging tooth side, and the first spring is set to twice the biasing force of the second panel. An operation rod (27) provided with a handle (26) at one end of the table case (17) is supported so as to be movable and rotatable in one direction, and is mounted on a tool head of a machine tool. The tool (44) and the tool handle (26) are engaged to rotate and operate the operating rod (27) in the axial direction, and the axial movement of the operating rod (27) is used to convert the linear oscillating motion ( 37) converts the rotation of the cam disk (71) into rotation, and further converts the rotation of the cam disk (71) into the axial movement of the cam disk by the force roller (76) and slides it. The disk (12) is moved forward and backward to fix and release the rotating table (1), and the rotation of the operating rod (27) is transmitted to the rotating table (1) to perform the rotation indexing operation. Index staples.

5. The rotary table (1) is provided on the table case Q7) so as to be rotatable around its swivel axis (2) and movable in the axial direction. The table case (17) is rotatable and immovable in the 轴 direction. A non-rotatable screwing (9) that advances and retreats with the attached screw (7) is provided rotatably and axially immovable on the turning 轴 (2), and a turning table is provided with turning teeth (5). The fixed teeth (23) that engage with the turning teeth are provided on the table case (17), and the table case (17) is provided with a tool handle (26) at one end. The operation tool (44) attached to the tool head of the machine tool is engaged with the tool handle (26) to rotate the operation rod (27) and move in the 轴 direction. The 移動 direction movement of (27) is transmitted to the screw (7) via the linear rotation movement conversion mechanism (37), (24), and the screw ring 9) Advancing and retreating the swivel 装着 attached to, fixing and releasing the rotation table α), transmitting the rotation of the operating rod (27) to the rotation table (1), and performing the rotation indexing operation. Features an index table.

6. A rotary table (1) is provided on a table case (17) so as to be rotatable around its pivot axis (2) so as to be movable in the head direction, and a cam disk (71) is rotatable relative to the pivot axis. A cam ring (74), which is provided so that it cannot be moved in the axial direction and has a force roller (76) that fits into the spiral groove (70) of the cam disk (71), is fixed to the table case (Π). An operation in which a turning tooth (5) is provided and a fixed tooth (23) corresponding to the turning tooth is provided in a table case (Π), and a table handle 7) has a handle (26) at one end. The rod (27) is rotatably supported in the 轴 direction and rotatably supported, and the operating handle (44) mounted on the tool head of the machine tool is engaged with the tool handle (26) to operate the operating rod (27). ) And axial movement, and the axial movement of this operation (27) is converted into the rotation of the cam disk (71) by the linear oscillating movement converting mechanism (37). The rotation of the cam circle (71) is converted into the axial movement of the cam disc (71) by the cam roller (76), and the turning axis is moved forward and backward to fix and release the rotation table (1). An index table, wherein the rotation operation of the operating rod (27) is transmitted to the rotary table (1) to perform the rotation indexing operation.

7. A screw rod (81) parallel to the operating rod (27) is erected on the table case (17), and a connecting member (35) attached to the operating rod (27) is extended and connected to the screw rod. 7. The screw rod (81) according to claim 2, wherein an engaging portion (90) for connecting a manual handle (91) is provided at a tip portion of the screw rod (81). Index table.

8. The rotary table (1) is a panel member (64) that absorbs the position error of the advancing end of the advancing / retracting member (9, 71) that engages and disengages the fixing coupling. The index table according to any one of claims 1, 2, 3, 4, 5, 6, and 7, wherein the index table is provided inside an operation tool (44) mounted on a tool head of a machine.