WO1999039069A1

WO1999039069A1 - Blocking device for a door provided with a door closer

Info

Publication number: WO1999039069A1
Application number: PCT/DE1999/000246
Authority: WO
Inventors: Uwe Käser; Michael Mösslein; Martin Reuter
Original assignee: Geze Gmbh; Geze Gmbh & Co.
Priority date: 1998-01-30
Filing date: 1999-01-30
Publication date: 1999-08-05
Also published as: DE19980135D2; EP1051558A1; DE29980014U1; ATE214773T1; EP1051558B1; AU3246999A

Abstract

The invention relates to a blocking device for a door provided with a door closer (3). A sliding arm (32) is coupled with the end thereof on the door leaf or on the door frame. The other end of the sliding arm is guided with a glider (33) inside a track (4) in a moveable manner, said track being arranged on the door frame or door leaf. The glider (33) interacts with a stop (61) which is arranged in the track (4) and which is pushed in the movement area of the glider (33) by the action of a spring element (6). The stop (61) interacts with an electrically switchable control element (8). According to the invention, the control element (8) comprises a piezo-electric element, a magnetostrictive element, a thermostrictive element, a shape-memory element or a comparable actuator. In order to prevent deviation, the spring element (6) is alternatively supported in or released from a support point by a blocking element (7) which is preferably guided in an axial direction in the track, whereby the blocking element (7) interacts with the control element (8). The movement of the blocking element (7) is blocked in a first position of the control element (8) and, as a result, the spring element (6) is blocked. As a consequence, the glider (33) which is guided in the track (4) can not deflect the stop (61), and the door leaf remains blocked. The movement of the blocking element (7) is permitted in a second position of the control element (8). The action of a recoil spring (9) causes the blocking element (7) to move out of the blocking position thereof and to release the spring element (6). The glider (33) can thus deflect the stop (61) against the force of the spring element (6) and the door leaf closes.

Description

Locking device for a door provided with a door closer

The invention relates to a locking device for a door provided with a door closer.

DE 88 05 834 U describes a mechanical locking device which has a stop cam which protrudes into the movement path of the slider connected to the output shaft of the door closer via a sliding arm and guided in the slide rail. The stop cam is attached to the free end of a leaf spring which is supported in a chamber of the slide rail. When the door is opened, the slider interacts with a flatter stop slope of the stop cam, whereby the leaf spring is bent and the cam is forced out of the path of movement of the slider. When the door is closed, the slider interacts with a steeper start slope of the stop cam. The closing moment of the door closer alone is not sufficient to force the cam out of the glider's path of movement. The door leaf remains locked in the open position. Only if there is an additional one manually applied to the door 2

Shooting moment, the slider can pass the stop cam and close the door. A disadvantage of this design is that, apart from manual overpressing, it is not possible to release the stop cam.

DE 43 05 710 describes a locking device with an electromagnet. It is a locking device for a door with a sliding arm door closer. The determination is made with an electromagnetic holding device mounted in the rail with a movable electromagnet and a fixed anchor plate. The device is integrated in the guide rail of the slide arm. The holding device has a stop cam which is movably mounted in a recess in the anchor plate and is pressed into the movement path of the slider under the action of a spring. The spring is supported on the one hand on the stop cam and on the other hand on the electromagnet.

When the door is opened, the slider interacts with a flatter run-up slope of the stop cam, either compressing the spring or lifting the electromagnet off the anchor plate when the electromagnet is switched off. The cam is pushed out of the path of movement of the slider. When the door is closed, the slider interacts with a steeper start slope of the stop cam. The closing moment of the door closer alone is not sufficient to compress the spring and push back the cam when the electromagnet is switched on. The door leaf remains locked in the open position. Only after switching off the electromagnet can it lift off the anchor plate and the cam can be pushed back. A disadvantage of this design is the size of the locking device, which is determined by the size of the electromagnet and the required holding force.

A similarly constructed locking device is described in EP 0 321 649 A1. In this embodiment, the electromagnet is fixed and the armature plate is movable. In this version, too, a push-on cam is forced into the path of movement of the slider under the action of a spring. 3

EP 0 764 752 A2 describes an electrical locking device with an electrical actuator. It is a locking device for a door with a sliding arm door closer. The actuator, designed for example as a piezo element, is arranged in the slide rail and interacts directly with the slide of the door closer guided in the slide rail. Depending on the electrical loading of the actuator, its extent changes, the slider being clamped by the actuator in the slide rail. A disadvantage of this design is that the direct action of the actuator on the slider requires a high force, and the actuator must be designed accordingly.

EP 0 757 145 A2 describes an electrical locking device with a piezo actuator for a wing of a revolving door. The piezo actuator is arranged in the area of the door lock. Depending on its electrical action, it blocks or releases the bolt that interacts with a striking plate. The power transmission between the bolt and the piezo actuator takes place via several cylindrical rolling elements.

The object of the invention is to develop an electrically releasable locking device which has a small size.

The object is achieved according to the invention by the subject matter of claim 1.

The stop interacts with a control element which has a piezoelectric element, a magnetostrictive element, a thermostrictive element, a shape memory element or the like. The use of such actuators enables a compact, small size and reduced power consumption. The power supply can be done conventionally via mains, battery or accumulator. The battery or the battery can be integrated in the rail. 4

In preferred exemplary embodiments, the sliding arm is connected to the output shaft of the door closer and is guided with a slider or a roller in a rail arranged on the door leaf or on the frame.

Preferably under the action of a spring element, the stop is forced into the path of movement of the slider or the roller. The spring element can optionally be supported or released against deflection by a blocking member guided in the rail in the axial direction at a support point, the blocking member cooperating with the control element.

The interposition of the blocking member between the spring element and the control element results in clear advantages over conventional designs with an electromagnet. Although only a very small force is required to support the blocking element by the piezo bender, as a result of the spring element being supported by the blocking element, a high force prevents the spring element from deflecting due to the slider. Since only a small locking force is required, the control element can be designed in a very small and compact and energy-saving design.

In a first position of the control element, the movement of the blocking member is blocked and thereby the spring element is also blocked. As a result, the slider guided in the rail cannot deflect the stop and the door leaf remains locked. However, the spring element can also be deflected in a supported position when the door is locked by manually pushing the door over to close the door.

In a second position of the control element, the movement of the blocking member is released. Under the action of a return spring, the blocking member moves out of its blocking position and releases the spring element. The slider can now deflect the stop against the force of the spring element and the door leaf closes. 5

In a preferred embodiment, the rail is designed as a two-chamber housing, a leaf spring being fixed in a first chamber and the slider being guided in the other chamber. A stop cam fixed on the leaf spring protrudes through a longitudinal opening between the two chambers into the movement path of the glider. The stop cam has a flatter run-up slope with which the slider interacts when the door is opened and a steeper run-up slope with which the slider interacts when the door is closed.

If the stop cam is arranged on the projecting free end of the leaf spring, the support point of the leaf spring is preferably in its central region. The support limits the bending range of the leaf spring and increases its effective bending strength, so that a greater effort is required to deflect it. In alternative designs, the stop cam can be arranged in the middle area and the support point can be in the end area.

When the door is opened, the leaf spring is deflected due to the flatter run-in slope, both with and without support, and the stop cam is pushed out of the path of movement of the slider. When the door is closed, the force exerted by the closer shaft and the slider is no longer sufficient to deflect the supported leaf spring. The slider remains blocked by the stop cam and the door is locked. However, manual overpressing is still possible. Only after the support has been released can the stop cam be pushed out of the movement path of the slide by the slider and the door closes.

The leaf spring is preferably fixed on one side in a slide mounted in the upper chamber. The slide can be locked in any position in the longitudinal direction of the slide rail with a clamping screw. In this way, the locking angle can be set as desired.

In a preferred embodiment, the blocking member is guided axially displaceably between a support position and a release position above the leaf spring. In 6

In the support position, the blocking member can be determined by a piezo element which is preferably designed as a piezo bender and which is fastened on one side in the slide and forms a stop surface for the blocking member with a projecting free end. The stop surface of the piezo bender is bevelled and cooperates in the locking position with a projection of complementary design on the blocking member.

In an advantageous embodiment, the blocking member has a flexurally elastic driver which projects into the path of movement of the slider and interacts with it. When the door is opened, the slider hits the driver and pushes the blocking element against the force of a return spring into the support position. In this position, the blocking member is preferably blocked against further axial movement by a stop attached to the leaf spring. Due to the force of the glider, the driver is bent and the glider can pass through it.

The blocking member can be determined by the piezo bender after reaching the support position. In this support position, the blocking member comes into contact with the leaf spring or a support surface mounted on the leaf spring at the support point and thereby prevents their deflection at the support point. Preferably, the deflection of the leaf spring is prevented by the blocking member taking up the entire free space above the leaf spring at the support point, the blocking member resting on the one hand on the leaf spring or a support surface mounted on the leaf spring and on the other hand on the top of the upper chamber or a rests in the chamber received support element.

In a preferred embodiment, the blocking member has two rolling bodies rolling on one another in the region of the support. One of the two rolling elements is in contact in the support point with the leaf spring or a supporting surface mounted on the leaf spring, and the other rolling element lies on the upper side of the upper chamber or one that is received or formed in the chamber 7

Support element. The rolling elements are preferably mounted in the blocking member with a horizontal axis of rotation.

To release and close the door, the power supply to the piezo bender is interrupted, which then releases the slide. The carriage moves into its release position under the action of the return spring and releases the support of the leaf spring. The slider can then deflect the leaf spring and the stop cam and the door is closed.

Advantages of this design result from the interposition of the blocking member between the leaf spring and the piezo bender. Although only a very small force is required to support the blocking member by the piezo bender, as a result of the support of the leaf spring, a high force prevents the spring from deflecting due to the slider. The execution of the support point by means of two rolling elements ensures that a release of the support point under pressure is possible on a rolling basis without overcoming a high static friction. This allows the return spring, which is responsible for the release movement of the blocking member, to be made relatively small.

In an alternative, also very advantageous embodiment, the control element is arranged transversely to the longitudinal axis of the slide rail and forms the base surface of a U-shaped blocking member which is arranged in a chamber of the slide rail. The blocking member has two movable clamping jaws, which are arranged along the side surfaces of the slide rail and are controlled by the control element. A lever arm of a rotatably mounted two-armed pivot lever is received between the clamping jaws. The pivot lever can be fixed in one position of the control element by the jaws and released again in the other position of the control element. The second lever arm is preferably shorter than the first lever arm which can be clamped and projects into the movement path of the sliding body in the locking position of the pivoting lever, whereby it blocks it. 8th

At the free end of the shorter lever arm, a roller is designed as a stop for the sliding body. By designing the stop as a roller, frictional forces are minimized, which occur when the sliding body pushes it back against the force of a return spring when the pivoting lever is released. The use of a pivot lever with lever arms of different lengths makes it possible to create a locking device which exerts a large restraining force on the sliding body with minimal effort by the control element.

In a modified embodiment, the control element is also arranged transversely to the longitudinal axis of the slide rail 4. The control element forms the base surface of a U-shaped blocking member and two movable clamping jaws rest on the two side surfaces in a chamber of the slide rail.

The stop which blocks the sliding body is designed as a stop roller and is mounted in a cuboid roller cage. The roller cage is forced into the movement path of the sliding body under the action of a leaf spring. The roller cage is vertically slidably mounted in a chamber of the slide rail. The roller cage is supported on a support body with a support roller. The support roller and the stop roller are arranged at opposite ends of the roller cage.

In the release position of the control element, the roller cage can be pressed down by the sliding body against the force of the leaf spring between the two clamping jaws. A bevel on the upper edge of the support body makes it easier to roll off the support roller and thus press it down. In the locking position of the control element, this alternative is blocked by the clamping jaws and the sliding body remains fixed. The axes of rotation of the support roller and the stop roller are arranged in a plane to optimize the force transmission, which forms an acute angle with the horizontal. In this way, large amounts of restoring forces can be achieved on the sliding body with little force by the blocking member. 9

The invention is explained in more detail in the figures. It shows:

Figure 1 shows a detail of a swing door with an overhead slide arm door closer in a perspective view;

FIG. 2 shows a cross section through the slide rail along line II-II perpendicular to the door frame plane in FIG. 1;

3 shows a longitudinal section through the slide rail in the area of the locking device along line III - III parallel to the door frame plane in FIG. 1 in the locking position of the blocking member;

FIG. 4 shows a detailed illustration of the blocking element in FIG. 3;

Figure 5 shows a section along line V-V in Figure 4 in the area of the rolling elements

6 shows a longitudinal section corresponding to FIG. 3 through the slide rail in the region of the locking device in the release position of the blocking member;

FIG. 7 shows a longitudinal section corresponding to FIG. 3 through the slide rail in the area of the locking device of an alternative embodiment; a) in the locking position; b) in the release position;

FIG. 8 shows a longitudinal section through the slide rail in the area of the locking device of a further embodiment; a) in the locking position; b) in the release position;

FIG. 9 shows a longitudinal section through the slide rail in the area of the locking device of a further exemplary embodiment, in the locking position;

FIG. 10 shows a longitudinal section through the slide rail in the area of the locking device of an alternative embodiment in the locking position; 10

Figure 1 1 is a plan view of the embodiment in Figure 10;

FIG. 12 shows a longitudinal section through the slide rail in the area of the locking device of a further embodiment in the locking position;

FIG. 13 shows a top view of the exemplary embodiment in FIG. 12.

The embodiment shown in Figure 1 shows an overhead door closer 3 with sliding arm 32 and a locking device according to the invention for the sliding arm 32. The door closer 3 is shown in dashed lines and is located on the side of the door leaf hidden in the figure. The slide arm 32 is guided in a slide rail 4, in which the locking device is integrated and can thereby be determined and released in the open position of the door leaf 11.

In the embodiment, the door closer 3 is mounted with its housing on the door leaf and the slide rail 4 on the stationary door frame 2. In other corresponding versions, this can also be reversed, so that the door closer housing is attached to the fixed frame 2 and the slide rail 4 on the door leaf 11.

In the door closer housing there is a drive unit, not shown, e.g. Closer spring and a driven closer shaft 31 mounted. The closer shaft 31 is rotatably connected to the slide arm 32. The slide arm 32 is slidably guided in the slide rail 4 with a slide body or a roller attached to its free end. It is a so-called manual, hydraulically damped door closer as described in DE 36 38 353 A1.

As can be seen in FIG. 2, the slide rail 4 has a multi-chamber housing, with two chambers 4o, 4u extending in the longitudinal direction of the slide rail 4. The locking device shown in FIG. 3 is arranged in an upper chamber 40. The sliding arm 32 is guided with the slider 33 in a lower chamber 4u. Between the two chambers 4o, 4u, two opposite web edges 42 are arranged on the sides of the slide rail 4. The web edges 42 11

define an opening extending in the longitudinal direction, which connects the chambers 4o, 4u to one another.

In the exemplary embodiment shown, the chamber 4u has a slot 41 which is accessible from below and into which the sliding arm 32 engages with the slider 33 from below. The slider 33 can also be designed as a roller.

The locking device, which is arranged in the upper chamber 4o, is described below in various embodiments. The device shown in Figure 3 consists of a slide 5 inserted into the chamber 4o and fastened there, a leaf spring 6 fastened on the underside of the slide 5, a blocking member 7 which is axially displaceably guided in the chamber 4o and which cooperates with the leaf spring 6 and a Piezo bender 8 as a control element for determining and releasing the blocking member 7.

The carriage 5 has a solid flat body. The carriage 5 is adapted in height and width to the cross section of the chamber 40, wherein it rests on the web edges 42 of the slide rail 4.

A vertical threaded hole 51 for receiving a clamping screw, not shown, is drilled in the left section of the body 5. The unit forming the carriage 5 is clamped in the chamber 4o by means of the clamping screw. The clamping screw with the pointed tip is supported at its upper free end on an upper boundary web 4a of the chamber 4o - this boundary web 4a forms the ceiling of the chamber 4o - and thus presses the unit with the underside facing the movement path of the slider 33 the rims 42.

The leaf spring 6 is fastened to the right section of the slide 5. The leaf spring 6 carries at its projecting free end a screw-attached stop cam 61. It rests with the broad side on the underside of the carriage 5 and is fastened to the carriage by a threaded screw 53. The leaf spring 6 lies with its side edges on the web edges 42 of the slide rail 4 12

on. To form a suitable bending stiffness which varies over the length of the leaf spring 6, the leaf spring 6 has individual recesses 75 which extend in the longitudinal direction of the leaf spring 6.

The stop cam 61 attached to the free end of the leaf spring 6 is arranged between the web edges 42 and projects into the lower chamber 4u into the movement path of the slider 33, not shown. The cam 61 is triangular in longitudinal section. It has a steeper inclined surface 61b on the right-hand side and a flatter inclined surface 61a on the left-hand side. The steeper surface 61b forms the run-up bevel for the slider 33 in the locking position. The slider 33 interacts with the flatter surface 61a when the door 1 is opened. In the middle of the leaf spring 6, a stop 62 for the blocking member is fastened via a rivet connection 63. The stair-shaped stop 62 forms a stop surface with a vertical stair section to limit the horizontal movement of the blocking member 7, which is guided in the upper chamber 4o and is designed as a slide. At the same time, the associated horizontal stair section serves as a support surface against deflection of the leaf spring 6 at this support point. The support surface cooperates with the blocking member 7, which is guided in the chamber 4o and described below.

On the top of the carriage 5, a strip-shaped web 54 is fastened by a screw 52 engaging in the carriage 5. The web 54 lies flat against the upper boundary web 4a of the chamber 4o and its width corresponds to the chamber width.

Between the web 54 and the leaf spring 6, the blocking member designed as a slide 7 is axially displaceably guided in the upper chamber 40. The dimensions of the blocking member 7 are adapted to the width of the upper chamber 4o. In doing so, it engages with corresponding guide edges 44 on the inner sides of the upper chamber 4o with the longitudinal edges molded onto it. The blocking member 7 is preferably made of plastic.

The end of the blocking member 7 facing away from the slide 5 acts in a supportive manner in the locking position with the stop 62 on the leaf spring 6. This 13

The slide end is designed as a bearing cage 71 for two rolling elements 78 lying vertically one above the other. The rolling elements 78 are in rolling connection with one another and the lower of the two rolling elements 78 cooperates with the stop 62 fastened to the leaf spring 6 by rolling on it. The upper of the two rolling elements 78 cooperates with the tongue 54a by rolling on it. To mount the rolling elements 78, the blocking member 7 has two legs 76 formed on the outer sides (FIG. 4), which protrude beyond the front end of the blocking member 7, bearing against the side walls 4b of the upper chamber 4o. Seen from above, the two legs 76 thus form a U-shaped closure of the blocking member 7.

Each of the two legs 76 has two horizontal bores 77 one above the other for mounting the two rolling elements 78. The rolling elements 78 are inserted from one of its side surfaces into the bores 77 before the blocking member 7 is mounted, so that the ends of the rolling elements 78 are accommodated on the left and right in the projecting legs 76 of the blocking element 7, while the central region of the rolling elements 78 is viewed from above and is exposed below. The bores 77 of each leg 76 directly adjoin one another so that the rolling elements 78 received therein are in a rolling connection.

FIG. 5 shows a section along line V-V in FIG. 4 in the area of the rolling elements 78. In this illustration, the upper of the two rolling elements 78 bears on the tongue 54a and the lower of the two rolling elements 78 on the stop 62 fastened on the leaf spring 6.

In the locking position shown in Figure 3, the blocking member 7 is in its extreme right position. The lower of the two rolling elements 78 lies on the vertical stop surface of the stop 62 fastened to the leaf spring 6 and at the same time lies on the horizontal support surface of the stop 62. The upper of the two rolling elements 78 bears on a closing tongue 54a of the web 54 on the upper side of the chamber 4o. The tongue 54a is narrower than the web 54, so that it is between the legs 76 in the bearing box. 14

fig 71 of the blocking member 7 can engage and comes into contact with the upper rolling element 78.

Overall, a continuous support of the leaf spring 6 thus arises via the stop 62, the two rolling elements 78 and the tongue 54a abutting the upper limiting web 4a of the chamber 4o, which can therefore no longer be bent at this support point. Only in the remaining area between the support and the stop cam 61 can the leaf spring 6 undergo deflection, but its effective bending stiffness increases. This means that a much higher force must be applied to achieve a deflection than if the entire spring length were available for bending. The force of the slider 33, which runs up under the action of the closer spring against the steep start slope 61 b of the stop cam 61, is then no longer sufficient to deflect the leaf spring 6. The slider 33 is blocked by the stop cam 61 and the door 1 is thereby determined in the open position.

A rod-shaped piezo element 8 as a control element holds the movable blocking member 7, which is designed as a slide, in its locking position. The piezo element is designed as a piezo bender 8 and is attached to the carriage 5 at one end below the web 54. The rod-shaped piezo element 8 extends inside the upper chamber 4o in its longitudinal direction. The cantilevered free end of the piezo bender 8 carries a bevelled nose 81 for support on a complementary projection 74 of the blocking member 7.

In the position shown, the piezo bender 8 is under tension and is linearly aligned. When the voltage is switched off, the free end of the piezo bender 8 bends upwards. The nose 81 at the free end of the piezo bender 8 thereby comes out of contact with the projection 74 of the blocking member 7. The bevel 81 prevents the cant from tilting relative to the front 15

jump 74, which is pressed under the force of a return spring 9 against the nose 81.

After release by the piezo bender 8, the blocking member 7 is displaced under the action of the return spring 9 in FIG. 3 to the left in the direction of the slide 5. The return spring 9 lies in a recess 75 on the upper side of the blocking member 7, whereby it is slidably supported on the one hand on the left end face of the recess 75 and on the other hand on a downwardly bent section 55 of the overlying web 54 fastened to the carriage 5.

FIG. 6 shows the state of the locking device after the blocking member 7 has been released by the piezo bender 8. The blocking member 7 has been moved to the left under the action of the return spring 9. The upwardly bent piezo bender 8 is not in contact with the projection 74 of the blocking member 7. The lower rolling element 78 is also no longer in contact with the stop surface and the support surface of the stop 62 on the leaf spring 6. The leaf spring 6 can now be in its position again Entire be bent, which also reduces the force required for deflection. This force can be applied by the slider 33, not shown, which rests under closer spring force on the steeper inclined surface 61b of the push-on cam 61. If the leaf spring 6 bends sufficiently, the slider 33 can pass in the lower chamber 4u below the stop cam 61 and the door 1 closes.

After the slider 33 has passed the stop cam 61, the leaf spring 6 relaxes and is again in its starting position. However, the blocking member 7 is still in its release position facing the carriage 5. Only when the door 1 is next opened, the blocking member 7 is moved by the slider 33 from its release position into its locking position during its rightward movement. For this purpose, a U-shaped driver 72 is formed on the underside of the blocking member 7, which projects with a bevelled driver cam 73 into the lower chamber 4u and thus into the movement path of the slider 33. In his right-wing movement 16

the slider 33 comes into contact with the driver cam 73 and pushes the blocking member 7 to the right under compression of the return spring 9. As soon as the blocking member 7 with the rolling element 78 runs onto the stop 62 of the leaf spring 6, the movement of the blocking member 7 is stopped. If an opening force continues to be exerted on the door 1, the slider 33 deforms the entrainer by the force exerted on the driving cam 73, which bends upwards in a flexurally elastic manner and thus allows the slider 33 to pass.

In the further course, the slider 33 passes the stop cam 61 of the leaf spring 6 by engaging the flatter inclined surface 61a and deflecting the leaf spring 6 in a counterclockwise direction. The door 1 can then be opened further. The slider 33 moves under the deflected stop cam 61.

If a determination of the door leaf 11 is desired, the piezo bender 8 must be energized again. The live piezo bender 8 straightens and the nose 81 snaps in front of the projection 74 of the blocking member 7, which is already in the extreme right position, as a result of which it is blocked in the locking position.

When the door 1 is closed, the slider 33 comes into contact with the steeper stop surface 61 b of the stop cam 61 during its left-hand movement. The rolling elements 78 are in contact with the stop 62 of the leaf spring 6 and the blocking member 7 is fixed in this position by the piezo bender 8. The dimensions of the leaf spring 6, the position of the support by the rolling elements 78 and the geometry of the stop cam 61 are selected so that when only the door 1 is acted upon by the door closer 3, the torque is not sufficient for the slider 33 to deflect the stop cam 61 and that Door 1 continues to close. The door 1 thus remains locked in the stop position.

A further closing can only take place when the detection is switched on when a greater torque is applied to the door 1, for example when the door 1 is closed by hand. The slider 33 passes the stop locomotive 17

ken 61 by deflecting it by the increased force while pivoting the leaf spring 6 counterclockwise upwards.

The locking device shown can be locked in the slide 5 in any position in the longitudinal direction of the slide rail 4 with the clamping screw, not shown. In this way, the locking angle of the door leaf 11 is adjustable.

To release and close door 1, the power supply control element, i.e. the piezo bender 8 interrupted, which then releases the carriage 5. As already described, the slide 5 moves to the left under the action of the return spring 9 and releases the support in the region of the stop 62 of the leaf spring 6. The leaf spring 6 can now be bent over its entire length with less effort. Under the action of the door closer 3, the slider 33 passes the stop cam 61 by deflecting it upwards by pivoting the leaf spring 6 in the counterclockwise direction

Advantages of this embodiment result from the interposition of the blocking member 7 designed as a slide between the leaf spring 6 and the piezo bender 8. Although only a very small force is required to support the blocking member 7 by the piezo bender 8, the leaf spring 6 is prevented by the blocking member from being supported as a result 7 a high force the deflection of the spring 6 by the slider 33. The execution of the support point by means of two rolling elements 78 ensures that a release of the support point under pressure is possible in a rolling manner without overcoming a high static friction. This also allows the return spring 9, which is responsible for the release movement of the blocking member 7, to be made relatively small.

Last but not least, the very small and compact design also allows the piezo bender 8 to be made extremely small and energy-saving.

FIG. 7 a shows an exemplary embodiment according to FIGS. 2 to 5 with a two-armed lever 82 for further reduction of force between the blocking member 7 18th

and piezo bender 8. The structure and the mode of operation of the embodiment shown in FIGS. 7a and 7b correspond to that in FIGS. 3 and 5. An explanation is therefore not given here.

Instead of a projection 74 on the blocking member 7, which in FIG. 3 interacts with the bevelled nose 81 at the free end of the piezo bender 8, a two-armed lever 82 is interposed in FIG. 7a. The lever 82 is mounted below the leaf spring 6 so that it can rotate counterclockwise about a horizontal axis. The bearing axis is fixed in the slide. A first L-shaped angled and leftward lever arm 82a is supported with a horizontal L-leg on the nose 81 of the piezo bender 8. Complementary to the bevel 81, the front surface of the lever arm 82a is also beveled.

A second lever arm 82b, also angled in an L-shape and directed to the right, is supported with a horizontal L-leg on the end face of the blocking member 7. The first L-leg 82a is about three times as far from the axis of rotation as the second L-leg 82b, so that a force reduction of 3: 1 results accordingly. This arrangement reduces the force exerted by the return spring 9 on the nose 81 of the piezo bender 8 and when the blocking member 7 is released, the piezo bender 8 has to overcome lower frictional forces. This allows even smaller, energy-saving piezo elements to be used.

FIG. 7b shows the release position with the piezo bender 8 pivoted upward. The two-armed lever 82 therefore no longer encounters any resistance on the left-hand side and is pivoted counterclockwise under the action of the force exerted by the return spring 9 on the blocking member 7 to the left. At the same time, the blocking member 7 is shifted to the left in the same direction.

As already described under FIG. 6, the blocking member 7 is moved to the right again into its locking position when the door 1 is opened. A not shown spiral spring on the axis of the two-armed lever 82 ensures that this 19

rotates clockwise from its tilted position shown in FIG. 7b and moves into its upright position shown in FIG. 7a.

A further modification of the embodiment shown in FIGS. 2 to 5 is shown in FIG. 8a. The blocking member 7 has an elongated shape in FIG. 8a. The bearing cage 71 equipped with two rolling elements 78 at the right-hand end of the blocking member 7 is supported near the free end of the leaf spring 6 with the lower of the two rolling elements 78 on the leaf spring 6 from an edge in a recess in the leaf spring 6. The upper rolling element 78 is supported as in the previous statements on the tongue 54a. In this embodiment, the stop cam 61 for the slider 33 is not fastened to the end of the leaf spring 6, but rather centrally on the latter. An advantage of this arrangement is that the effective lever arm of the support point of the rolling elements 78 on the leaf spring 6 is longer than the effective lever arm which is determined by the position of the stop cam 61 on the leaf spring 6. Because of these lever ratios, the force exerted by the slider 33 on the stop cam 61 and the leaf spring 6 on the rolling elements 78 is lower than in the previous embodiments.

Another modification shown in this embodiment relates to the shape of the driver 72. The driver 72 is designed C-shaped, wherein it is only fixed to the blocking member 7 with its right-hand end, while the left-hand end projects freely upwards.

FIG. 8b again shows the release position with the leaf spring 6 pivoted upward. The return spring 9 is not shown, which is supported in the same way as in the figures described above on the one hand on the blocking member 7 and on the other hand on the slide 5.

FIG. 9 shows a further embodiment in which a separate return spring 9 is dispensed with. Instead, an obliquely downwardly directed plastic tab 79 is formed on the right-hand end of the blocking member 7, following the bearing cage 71 with the rolling elements 78. This plastic flap 79 strikes when the blocking member 7 is forced to move to the right 20th

on a slope 64 which is attached to the leaf spring 6 following the stop 62. The tab 79 is bent downwards at the slope 64 and is under elastic tension. After the blocking member 7 is released, the energy stored in the tab 79 is released again here and the blocking member 7 moves back to the left, the tab 79 being pressed against the slope 64.

A further exemplary embodiment with a modified arrangement of the control element 8 is shown in FIGS. 10 and 11. In this embodiment too, the slide rail 4 is designed in two parts with an upper chamber 4o and a lower chamber 4u. However, additional guide edges 44, as shown in FIG. 2, are dispensed with. The entire locking device is arranged on a printed circuit board 56 which is pushed into the slide rail 4 from the long side and is fastened by a clamping screw 56a.

The control element is designed as a piezo element 8 and in this embodiment is arranged transversely to the longitudinal axis of the slide rail 4. The control element 8 forms the base surface of a U-shaped blocking member 91, which has two movable clamping jaws 92 as a U-leg (FIG. 11). The clamping jaws 92 rest on the two side surfaces of the upper chamber 4o of the slide rail 4. The control element 8 and the jaws 92 occupy approximately the entire height of the upper chamber 4o.

A longer lever arm 65a of a two-armed pivot lever 65 is received between the free ends of the clamping jaws 92. The pivot lever 65 is rotatably mounted on a pivot bearing 67 about an axis which is horizontal in FIG. As can be seen in FIG. 11, the pivot bearing 67 is supported on the printed circuit board 56 in a support body 68. The support body 68 also receives the clamping screw 56a for fastening the printed circuit board 56.

The shorter, slightly angled second lever arm 65b protrudes in the illustration in FIG. 10 into the movement path of the sliding body 33 guided in the lower chamber 4u of the slide rail 4, which slide body 33 is connected to the slide arm of the door 21

Closer is connected. In this position, the sliding body 33 is blocked by the pivot lever 65.

Depending on the functional state of the control element 8, the lever arm 65a is determined or released by the clamping jaws 92. The control element 8, which is designed as a piezo element, and the clamping jaws 92 are connected to one another in such a way that, when the piezo element 8 is in the de-energized initial state, the clamping jaws 92 point outward in a slight V-shape, so that the lever arm 65 a located between the clamping jaws 92 is released. The long lever arm 65a can thus pivot downwards between the clamping jaws 92, the opposite short lever arm 65b pivoting upwards and releasing the sliding body 33. In order to facilitate this process, the surfaces of the clamping jaws 92 facing the lever arm 65a have a bevel 92a. In addition, the corresponding counter surface on the lever arm 65a can also be designed beveled. In order to minimize the friction losses between the sliding body 33 and the pivoting lever 65, the free end of the pivoting lever is designed as a roller 66 which interacts with the sliding body 33.

In the energized state of the control element 8, it bends so that the clamping jaws 92 point slightly inwards and clamp the lever arm 65a in the position shown in FIG. 10 between its free ends. In this position, the sliding body 33 is blocked at the right-hand end of the sliding rail (open position of the door) by the short lever arm 65b projecting into its movement path.

The bevels 92a at the ends of the clamping jaws 92 also allow the sliding bodies 33 to be pressed over and the door to be forced to close when the control element 8 is energized and the pivoted lever 65 is blocked. By applying a corresponding force to the sliding body 33, the clamping jaws 92 are pressed apart by the lever arm 65a. The bevels 92a enable a suitable force transmission without causing damage to the blocking member 91. 22

In addition to further electronic components (not shown), a plug contact 58, a potentiometer 57 and two reed switches 59a, 59b are arranged on the printed circuit board 56. The plug contact 58 is used to supply the locking device with power and to connect it to control electronics. The supply voltage of the control element 8 and thus its deflection can be varied via the potentiometer. In this way, the holding forces exerted by the clamping jaws 92 on the pivoting lever 65 can be adjusted. The reed switches 59a, 59b serve to determine the current position of the sliding body 33. The reed switches 59a, 59b are triggered by a permanent magnet 34 attached to the top of the sliding body 33.

When the door is opened, the sliding body 33 first triggers the left reed switch 59a, whereupon the control element 8 is switched off in order to enable the sliding body 33 to pass the pivoting lever 65b without problems. Here, the lever arm 65b is pushed up. When the sliding body 33 continues to move, the leaf spring presses the lever arm 65b down again. When the right reed switch 59b is reached, the control element 8 is energized again and the pivot lever 65 is locked. The reed switch 59b signals that the sliding body 33 is in the locking position. Overpressure and forced closing of the door leaf can also be recognized by the reed switches 59a, 59b if the reed switch 59a is triggered despite the control element 8 being energized. Any inactive leaf can then also be activated.

FIGS. 12 and 13 show a further exemplary embodiment with a blocking member 91. The blocking member 91 is constructed identically to the blocking member described in FIGS. 10 and 11. The control element 8, which is also designed as a piezo element, is arranged transversely to the longitudinal axis of the slide rail 4. The control element 8 forms the base surface of the U-shaped blocking member 91 and two movable clamping jaws 92 rest on the two side surfaces of the upper chamber 4o of the slide rail 4. The control element 8 and the jaws 92 occupy approximately the entire height of the upper chamber 4o. 23

The basic structure of the printed circuit board 56, on which the blocking member 91 is arranged at the end, also corresponds to the embodiment in FIGS. 10 and 11. A plug contact 58 is used to connect the voltage supply and the control lines, via a potentiometer 57 is the supply voltage of the control element 8 adjustable and two reed switches 59a, 59b detect the position of a permanent magnet 34 attached to the sliding body 33.

The stop, which blocks the sliding body 33, is also designed as a roller 66. In contrast to the previous embodiment, the stop roller 66 is mounted in a cuboid roller cage 70, which is forced into the movement path of the sliding body 33 under the action of a leaf spring 93 mounted on the printed circuit board 56. The roller cage 70 is mounted vertically displaceably in the upper chamber 4o of the slide rail 4. The roller cage 70 is supported with a support roller 69 on a support body 68 mounted on the printed circuit board 56. The support roller 69 and the stop roller 66 are arranged at opposite ends of the roller cage 70.

In the released position of the control element 8, the roller cage 70 can be pressed down by the sliding body 33 against the force of the leaf spring 93 between the two clamping jaws 92 of the blocking member 91. A bevel 68a on the upper edge of the support body 68 facilitates the rolling of the support roller 69 and thus the pressing down. In the locking position of the control element 8, when the clamping jaws 92 are oriented slightly inwards, this alternative is blocked and the sliding body 33 remains locked. The axes of rotation of the support roller 69 and the stop roller 66 are arranged to optimize the force transmission in a plane which forms an acute angle with the horizontal. In this way, large restoring forces on the sliding body can be achieved by the blocking member 91 with little use of force.

Chamfered edges 92a on the upper side of the clamping jaws 92 nevertheless enable the sliding body 33 to be pressed over and the door to be forced to close when the control element 8 is energized and the roller cage 70 is blocked 24

Applying a corresponding force to the sliding body 33, the clamping jaws 92 are pressed apart by the roller cage 70. The bevels 92a enable a suitable force transmission without causing damage to the blocking member 91.

The reed switches 59a, 59b serve to determine the current position of the sliding body 33. The reed switches 59a, 59b are triggered by a permanent magnet 34 attached to the top of the sliding body 33. When the door is opened, the sliding body 33 first triggers the left reed switch 59a, whereupon the control element 8 is switched off in order to enable the sliding body 33 to be easily pressed down on the roller cage 70. When the slider continues to move, the leaf spring 93 pushes the roller cage 70 back into the lower chamber 4u. When the sliding body 33 reaches the right reed switch 59b, the control element 8 is energized again and the roller cage 70 is locked. The reed switch 59b signals that the sliding body 33 is in the locking position. Overpressure and forced closing of the door leaf can likewise be recognized by the reed switches 59a, 59b if the reed switch 59a is triggered despite the control element 8 being energized. Any inactive leaf can then also be activated.

25

List of reference numbers

1 door

11 door leaves

2 frames

3 door closers

31 closer shaft

32 sliding arm

33 sliding body, slider

34 magnet

Slide rail a boundary web

4b side part o upper chamber u lower chamber 1 slot 2 web edge, web edge 3 opening 4 guide edge

5 sledges, sled body

51 threaded hole

52 screw

53 threaded screw

54 footbridge

54a tongue

55 abutments

56 printed circuit board

56a clamping screw 7 potentiometer

58 plug contact

59a, 59b reed switch

Leaf spring

61 stop cams, cams 26

a flat inclined surface b steep inclined surface

attack

Riveted joint

slope

Swing lever a long lever arm b short lever arm

Stop roll

Pivot bearing

Support block

Support roller

Roller cage

Blocking member

Bearing cage

takeaway

Driving cams

head Start

Recess

leg

drilling

Rolling elements

Tab

Piezo bender, control

nose

Lever a, 82b lever arm

Connection contact

Return spring

Blocking member

Jaws a bevel

Leaf spring

Claims

27 Claims

1. Locking device for a door provided with a door closer with a sliding arm arranged between a door leaf and a fixed frame and a rail in which the sliding arm is guided, the sliding arm being supported at one end on the door leaf or on the frame, preferably articulated and is displaceably guided with its other end in the rail arranged on the frame or on the door leaf, and with a movable stop arranged in the region of the rail, interacting with an electrically switchable control element, interacting with the slide arm, which in one rail in the rail a certain locking angle of the door leaf is arranged, the control element (8) having a piezoelectric element, a magnetostrictive element, a thermostrictive element, a shape memory element or a comparable actuator.

2. Locking device according to claim 1, that the control element (8) has a piezo stack, which is preferably designed as a piezo bender mounted on one side or preferably as a radial or centrally mounted piezo rotary block.

3. Locking device according to claim 1 or 2, dadu rc h ge ke nn ze ichn et that the control element (8) performs a curving and / or stretching movement. 28

4. Locking device according to one of claims 1 to 3, dadu rc h geke nze n et that between the control element (8) and the stop (61, 66) acts a blocking member (7, 91), the control element (8) actuates the blocking member (7, 91), and wherein the blocking member (7, 91) releases the stop (61, 66) or blocks it in a locking position.

5. Locking device according to claim 4, so that the blocking member (7) is designed as a slider axially movably mounted in the region of the rail (4).

6. Locking device according to claim 4 or 5, so that the control element (8) cooperates with the blocking member (7), which is preferably designed as a slide, which in turn interacts with the stop (61) and between one Support position and a release position is displaceable.

7. Locking device according to one of claims 4 to 6, so that the control element (8) in a first position blocks the axial movement of the blocking member (7), which is preferably designed as a slide, and in a second position the Axial movement of the blocking member (7), which is preferably designed as a slide, releases. 29

8. Locking device according to one of claims 4 to 7, d ad u rc hge ke nn ze ichn et that the control element (8) is fixed on one side in a bearing body, preferably carriage body (5), wherein at the free end of the control element (8) a stop surface (81) for the blocking member (7), which is preferably designed as a slide, is formed.

9. Locking device according to one of claims 4 to 8, d ad u rc h g e ke n n ze i c h n et that the control element (8) cantilevered horizontally extends in a chamber (4o) of the rail (4).

10. Locking device according to one of claims 4 to 9, so that the stop surface of the control element (8) is bevelled and in the locking position of the control element (8) with a blocking member, which is preferably designed as a slide (7) complementary projection (74) cooperates.

11. Locking device according to one of claims 4 to 10, so that the blocking member (7), which is preferably in the form of a slide, has a preferably flexurally elastic driver (72) which is in the path of movement of the slider (33) protrudes and interacts with it at least when the door (1) is opened. 30th

12. Locking device according to one of claims 4 to 11, d a d u rch g e ke n n ze i ch n et that the blocker member (7) as a directly or indirectly interacting with the movable stop (66), reversibly deformable element

(91) is formed.

13. Locking device according to one of claims 4 to 12, d a d u rc h g eke n n ze i c h n et that the blocking member is designed as a clamping device (91).

14. Locking device according to one of claims 4 to 13, in particular according to claim 13, so that the control element (8) cooperates with the blocking member (91) mounted in the region of the rail or as part of the blocking member (91 ) is formed, the blocking member (91) directly or indirectly blocking the stop (66) in a first position and releasing the stop (66) in a second position.

15. Locking device according to one of claims 4 to 14, in particular according to claim 13 or 14, that the blocking member (91) has a U-shaped shape, the U-legs as clamping jaws (92 ) are formed and between the U-legs

(92) A free space remains. 31

16. Locking device according to claim 14 or 15, so that the U-legs (92) of the blocking member (91) move apart and when the control element (9) is de-energized, when the control element (8) is energized Remove the U-legs of the blocking member (91) from one another, or vice versa.

17. Fixed part device according to claim 15 or 16, so that a region of the stop (66) in the slide rail (4) between the U-legs (92) of the blocking member (91) is guided vertically displaceably.

18. Locking device according to one of claims 15 to 17, so that the stop (66) is formed such that the stop (66) is formed on a first lever arm (65b) of a two-armed pivot lever (65), a second lever arm (65a) vertically is slidably guided between the U-legs (92) of the blocking member (91).

19. Locking device according to claim 18, so that the pivot lever (65) is rotatably mounted in the rail (4), preferably rotatably about an axis (67) perpendicular to the direction of movement of the slider (33).

20. Locking device according to one of claims 14 to 19, so that the U-leg (92) and / or the lever arm (65a) of the pivot lever (65) have mutually facing inclined surfaces. 32

21. Locking device according to one of claims 4 to 20, so that the blocking member (7), which is preferably in the form of a slide, is mounted against the force of a return spring (9) or the like acting in the direction of the release position.

22. Locking device according to claim 21, so that the return spring (9) is mounted in a recess (75) of the blocking member (7), which is preferably designed as a slide, on the one hand on an end wall of the recess ( 75) is slidably supported and, on the other hand, is supported on the abutment (55), which preferably engages in the recess (75), in a rail-fixed or sled-fixed manner.

23. Locking device according to one of the preceding claims, d ad u rc h g e ke n n ze i c h n et that the movable stop under the action of a spring element (6) is pushed into the range of motion of the sliding arm.

24. Locking device according to claim 23, so that the spring element is designed as a leaf spring (6) and the control element (8) cooperates directly or indirectly with the leaf spring (6), preferably providing that Leaf spring (6) is supported by the blocking member (7) in the supporting position of the blocking member in the bending direction. 33 -

25. Locking device according to claim 24, so that the stop (61) is arranged in the end region of the leaf spring (6) and the leaf spring (6) is supported in the central region thereof, or vice versa.

26. Locking device according to claim 24 or 25, so that the blocking member (7), which is preferably designed as a slide, is in its supporting position on the one hand on the leaf spring (6) or on the leaf spring (6) mounted support surface (62 ) is present and on the other hand is supported on the rail (4) or a rail-fixed component.

27. Locking device according to one of claims 24 to 26, so that a slide stop (62) on the leaf spring (6) is formed or fastened, which prevents the horizontal movement of the blocking member (7 ) in one chamber (4o) in a direction of movement facing away from the control element (8).

28. Locking device according to one of claims 4 to 27, so that the stop (62) forms a support surface for supporting the blocking member (7), which is preferably designed as a slide, in the vertical direction. 34

29. Locking device according to one of claims 24 to 28, so that the leaf spring (6) has a bending strength which varies over its length.

30. Locking device according to one of claims 4 to 29, so that the blocking member (7), which is preferably designed as a slide, has two rolling elements (78), preferably providing that the rolling elements in bores (77) of the blocking member (7), which is preferably designed as a slide, are rotatably mounted about a horizontal longitudinal axis.

31. Locking device according to claim 30, so that the rolling elements (78) are in rolling contact with one another.

32. Locking device according to claim 30 or 31, so that one of the rolling elements (78) in the supporting position of the blocking member (7) on the leaf spring (6) or one on the leaf spring (6) are mounted Support surface, for example slide stop (62), and the other rolling element (78) rests on the top of one chamber (4o) or a support element (54a) arranged in the chamber (4o). 35

33. Locking device according to one of claims 30 to 32, d ad u rch ge ke nn ze ichn et that a freely projecting web (54) on the bearing body, preferably carriage body (5) is attached, wherein the web (54) on the The top of one chamber (4o) abuts and forms a rolling surface for a rolling element (78).

34. Locking device according to claim 33, d a d u rc h g e ke n n ze i c h n et that an abutment for the return spring (9) is formed in or on the web (54).

35. Locking device according to one of the preceding claims, so that the stop is constructed as a stop cam (61) with a flatter stop surface (61a) and a steeper stop surface (61b), the slider guided in the rail (33) interacts with the flatter stop surface (61a) when the door (1) is opened and with the steeper stop surface (61b) when the door (1) is closed.

36. Locking device according to one of the preceding claims, d ad u rch g e ke n n ze i c h n et that the stop (66) is designed as a roller.

37. Locking device according to one of the preceding claims, that the rail (4) is designed as a two-chamber housing with two parallel chambers (4o, 4u) which are connected to one another by an opening (43) are connected. 36

38. Locking device according to claim 37, so that one or more sliding elements (33) connected to the sliding arm (32) are guided in one chamber (4u) and the control element (8) in the other Chamber (4o) is arranged.

39. Locking device according to claim 37 or 38, so that a bearing body, preferably slide body (5) in the housing of the rail (4), preferably in one chamber (4o) in a selectable position, e.g. Can be fixed using a clamping screw, the control element (8) and / or the spring element (6, 93) being mounted on or in the bearing body (5).

40. locking device one of claims 37 to 39, dadurchge ke nn ze ichn et that the spring element (6, 93) on one side, preferably horizontally projecting in a housing in the rail (4) arranged bearing body, preferably in the carriage body (5) attached is.