EP1051558B1 - Blocking device for a door privided with a door closer - Google Patents

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

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

DE 88 05 834 U describes a mechanical locking device, which has a stop cam that is in the path of movement of a Sliding arm connected to the output shaft of the door closer and in the Guided slide protrudes. The stop cam is at the free end attached to a leaf spring which is supported in a chamber of the slide rail. When the door is opened, the slider acts with a flatter ramp on the stop cam together, with the leaf spring bent and the cam out of the Movement path of the glider is pushed. When the door is closed, it works Slider together with a steeper stop slope of the stop cam. The The closing moment of the door closer alone is not sufficient to close the cam to push out of the trajectory of the glider. The door leaf remains in the open position detected. Only if there is an additional one manually applied to the door Closing moment, the slider can pass the stop cam and the door conclude. The disadvantage of this design is that except by manual overpressing no release of the stop cam is possible.

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 mounted in the rail Holding device with a movable electromagnet and a fixed one Anchor plate. The device is integrated in the guide rail of the slide arm. The holding device has a movable in a recess of the anchor plate stored stop cams on the action of a spring in the path of movement the glider is pushed. The spring is based on the one hand on the Stop cam and on the other hand on the electromagnet.

When the door is opened, the slider acts with a flatter ramp on the stop cam together, either compressing the spring, or at When the electromagnet is switched off, the electromagnet is lifted off the armature plate becomes. The cam is pushed out of the path of movement of the slider. When the door is closed, the slider acts with a steeper ramp Stop cam together. The closing moment of the door closer alone is enough not to compress the spring when the electromagnet is switched on and push the cam back. The door leaf remains locked in the open position. Only after switching off the electromagnet can it be removed from the anchor plate lift off and the cam is pushed back. Disadvantage of this Execution is the size of the locking device, which is determined by the size of the electromagnet and the required holding force is determined.

A similarly constructed locking device is described in EP 0 321 649 A1. In In this version, the electromagnet is arranged in a fixed position and the armature plate movable. A stop cam is also effective in this version a spring pushed into the trajectory of the glider.

EP 0 764 752 A2 describes an electrical locking device with a electric actuator. It is a locking device for a door with Gleitarmtürschließer. The actuator, for example designed as a piezo element, is shown in FIG the slide rail arranged and acts directly with that in the slide rail guided slide of the door closer together. Depending on the electrical Actuation of the actuator changes its extent, with the slider through the actuator is clamped in the slide rail. The disadvantage of this version is that a high through the direct action of the actuator on the slider Force is required, and the actuator is designed accordingly have to be.

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 in the range of Door lock arranged. Depending on its electrical exposure he blocks the bolt that interacts with a striking plate or he gives it free. The power transmission between the bolt and the piezo actuator takes place via several cylindrical rolling elements.

EP 0 273 346 describes an electrical locking device for one with a Door closer provided wing of a door described. The locking device has a slide rail and a slide shoe slidably guided in the slide rail with recess on. In the slide rail is one of an electromagnet actuated lever device arranged with a movable cam. The cam will by means of the lever device moved by the electromagnet and accesses Lock in the recess of the shoe. The disadvantage is that this Locking device due to the volume of the electromagnet and the Lever device builds quite large and that the sliding shoe for locking relatively must be positioned exactly at one end of the slide rail.

The object of the invention is to provide an electrically releasable locking device develop, 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, which one piezoelectric element, a magnetostrictive element, a thermostrictive Element or a shape memory element. Because of the engagement Such actuators have a compact, small size and a reduced size Power consumption. The power supply can be conventional via mains, battery or Battery. The battery or the battery can be integrated in the rail.

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

The stop is preferably in the path of movement under the action of a spring element of the glider or the roller. The spring element can by a blocking member guided in the rail preferably in the axial direction in a support point either supported against a deflection or released are, the blocking member cooperating with the control element.

By interposing the blocking member between the spring element and Control element, there are clear advantages over conventional designs with electromagnet. Although only a very small force to support the Blocking member required by the piezo bender is prevented as a result of Support of the spring element by the blocking member a high force the deflection of the spring element through the slider. Because only a small locking force Is required, the control can be very small and compact as well be energy-saving design.

In a first position of the control element, the movement of the blocking member locked and thereby blocked the spring element. 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 supported Position deflected when the door is locked by manually pushing the door over are going to close the door.

In a second position of the control element, the movement of the blocking member Approved. The blocking member moves under the action of a return spring out of its blocking position and releases the spring element. The glider can now deflect the stop against the force of the spring element and the door leaf closes.

In a preferred embodiment, the rail is designed as a two-chamber housing, wherein a leaf spring is fixed in a first chamber and the slider is performed in the other chamber. A stop cam attached to the leaf spring protrudes through a longitudinal opening between the two chambers into the movement path the glider. The stop cam has a flatter start slope with which the slider cooperates when opening the door, and a steeper one Sloping run-up with which the slider interacts when the door is closed.

The stop cam is arranged on the projecting free end of the leaf spring is the support point of the leaf spring is preferably in the central region. The bending area of the leaf spring is limited by the support and it increases their effective bending strength, so that a higher effort their deflection is required. In alternative versions, the stop cam be arranged in the middle area and the support point in the end area lie.

When the door is opened, the leaf spring is due to the flatter ramp deflected both with and without support and the stop cam from the Movement path of the glider is crowded. When the door is closed, it extends over the Closer shaft and the glider no longer exerted force on the supported Deflect leaf spring. The slider remains blocked by the stop cam and locked the door. However, manual overpressing is still possible. The stop cam can only be released by the Gliders are pushed out of the trajectory of the glider and the door closes.

The leaf spring is preferably on one side in a bearing mounted in the upper chamber Sledge set. The carriage can be clamped in any position Position in the longitudinal direction of the slide rail can be locked. That way the locking angle can be set as desired.

In a preferred embodiment, the blocking member is axial above the leaf spring slidably guided between a support position and a release position. In the support position can be blocked by a preferably as a piezo bender trained piezo element can be determined, which one-sided in the carriage is attached and with a cantilevered free end a stop surface for the Blocking member forms. The stop surface of the piezo bender is bevelled and acts in the fixed position with one complementary to the blocking member trained lead together.

In an advantageous embodiment, the blocking member has a flexurally elastic driver on, which protrudes into the path of movement of the glider and interacts with it. When the door is opened, the glider hits the driver and pushes it Blocking member against the force of a return spring up to the support position yourself. In this position, the blocking member is preferably opened by one the leaf spring attached stop blocked against further axial movement. The driver is bent by the force of the glider and the Glider can pass this.

The blocking member can be reached by the piezo bender after reaching the support position be determined. In this support position, the blocking member arrives at the support point in contact with the leaf spring or a support surface mounted on the leaf spring and thereby prevents their deflection in the support point. Preferably the deflection of the leaf spring is prevented by the blocking member in Support point in vertical extension the entire free space above the leaf spring occupies, the blocking member on the one hand on the leaf spring or on the leaf spring mounted support surface and on the other hand at the top of the abuts the upper chamber or a support element received in the chamber.

In a preferred embodiment, the blocking member has in the area of Support two rolling elements rolling on each other. One of the two rolling elements is in the support point in contact with the leaf spring or one on the leaf spring mounted support surface and the other rolling element is on the top of the upper chamber or one accommodated or trained in the chamber Support element. The rolling elements with a horizontal axis of rotation are preferred Blocking member stored.

To release and close the door, the power supply to the piezo bender interrupted, which then releases the sled. The sledge moves moves into its release position under the action of the return spring and releases the Support of the leaf spring free. The glider can then the leaf spring and the Deflect the stop cam and the door is closed.

Advantages of this design result from the interposition of the blocking member between leaf spring and piezo bender. Although only a very small one 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 deflection the spring through the glider. The execution of the base by means of two Rolling element ensures that the pressurized parts are released Support point possible on a rolling basis without overcoming a high static friction is. This allows the return spring, which is used for the release movement of the blocking member is responsible to execute relatively small.

In an alternative, also very advantageous embodiment, the control element arranged transversely to the longitudinal axis of the slide rail and forms the base surface a U-shaped blocking member, which in a chamber of the slide rail is arranged. The blocking member has two movable jaws, which are arranged along the side surfaces of the slide rail and by the Control can be controlled. There is a lever arm between the jaws a rotatably mounted two-armed pivot lever. The Swivel lever can be in one position of the control element through the clamping jaws determined and released again in the other position of the control element become. The second lever arm is preferably shorter than that clampable first lever arm and protrudes in the locking position of the swivel lever the path of movement of the slider, blocking it.

At the free end of the shorter lever arm is a roller as a stop for the sliding body educated. By designing the stop as a role there are frictional forces minimizes which occur when the slider is released Swing lever pushes it back against the force of a return spring. The usage a swivel lever with lever arms of different lengths it to create a locking device which with minimal effort exerts a large retention force on the sliding body by the control element.

In a modified embodiment, the control element is also transverse to Longitudinal axis of the slide rail 4 arranged. The control element forms the base surface a U-shaped blocking member and two movable jaws 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 stored in a cuboid roller cage. The roller cage is under the Effect of a leaf spring pushed into the path of movement of the sliding body. The Roller cage is a chamber of the slide rail mounted vertically. 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 pass through the sliding body the blocking member against the force of the leaf spring between the two jaws be pushed down. A bevel on the top edge of the support body facilitates the rolling of the support roller and thus the pressing down. In the Locking position of the control, this alternative is through the The jaws are blocked and the sliding body remains locked. The axes of rotation of the Support roller and the stop roller are in order to optimize the power transmission arranged on a plane which forms an acute angle with the horizontal. In this way, the blocking member can be used with little force achieve large restoring forces on the sliding body.

Figur 1

einen Ausschnitt einer Drehflügeltür mit einem obenliegenden Gleitarmtürschließer in perspektivischer Ansicht;

Figur 2

einen Querschnitt durch die Gleitschiene entlang Linie II - II senkrecht zur Türrahmenebene in Figur 1;

Figur 3

einen Längsschnitt durch die Gleitschiene im Bereich der Feststellvorrichtung entlang Linie III - III parallel zur Türrahmenebene in Figur 1 in Feststellposition des Blockiergliedes;

Figur 4

eine Detaildarstellung des Blockiergliedes in Figur 3;

Figur 5

einen Schnitt entlang Linie V-V in Figur 4 im Bereich der Wälzkörper

Figur 6

einen Figur 3 entsprechenden Längsschnitt durch die Gleitschiene im Bereich der Feststellvorrichtung in Freigabeposition des Blockiergliedes;

Figur 7

einen Figur 3 entsprechenden Längsschnitt durch die Gleitschiene im Bereich der Feststellvorrichtung einer alternativen Ausführungsform; a) in Feststellposition; b) in Freigabeposition;

Figur 8

einen Längsschnitt durch die Gleitschiene im Bereich der Feststellvorrichtung einer weiteren Ausführungsform; a) in Feststellposition; b) in Freigabeposition;

Figur 9

einen Längsschnitt durch die Gleitschiene im Bereich der Feststellvorrichtung eines weiteren Ausführungsbeispieles, in Feststellposition;

Figur 10

einen Längsschnitt durch die Gleitschiene im Bereich der Feststellvorrichtung einer alternativen Ausführungsform in Feststellposition;

Figur 11

eine Draufsicht auf das Ausführungsbeispiel in Figur 10;

Figur 12

einen Längsschnitt durch die Gleitschiene im Bereich der Feststellvorrichtung einer weiteren Ausführungsform in Feststellposition;

Figur 13

eine Draufsicht auf das Ausführungsbeispiel in Figur 12.

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

Figure 1

a detail of a swing door with an overhead sliding arm door closer in a perspective view;

Figure 2

a cross section through the slide along line II - II perpendicular to the door frame plane in Figure 1;

Figure 3

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 Figure 1 in the locking position of the blocking member;

Figure 4

a detailed view of the blocking member in Figure 3;

Figure 5

a section along line VV in Figure 4 in the area of the rolling elements

Figure 6

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

Figure 7

3 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;

Figure 8

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;

Figure 9

a longitudinal section through the slide rail in the area of the locking device of another embodiment, in the locking position;

Figure 10

a longitudinal section through the slide rail in the locking device of an alternative embodiment in the locking position;

Figure 11

a plan view of the embodiment in Figure 10;

Figure 12

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

Figure 13

a plan view of the embodiment in Figure 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 with its housing on the Door leaf and the slide rail 4 mounted on the fixed door frame 2. With others corresponding constructions, this can also be provided vice versa, so that the door closer housing on the fixed frame 2 and the slide rail 4th is attached to 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 with a at its free end attached sliding body or a roller in the slide rail 4 slidably guided. It is a so-called manual hydraulic 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 delimit an opening which extends in the longitudinal direction and connects the chambers 4o, 4u to one another.

In the illustrated embodiment, the chamber 4u has one from below forth accessible slot 41, in which the slide arm 32 with the slider 33 from engages 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 to 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 in Height and width adapted to the cross section of the chamber 4o, he on the Web edges 42 of the slide rail 4 rests.

In the left section of the body 5 there is a vertical threaded hole 51 for Received a clamping screw, not shown, drilled. The sledge 5 forming unit, is clamped in the chamber 4o via the clamping screw. The clamping screw with the pointed tip is supported on its upper free one End at an upper boundary web 4a of the chamber 4o - this boundary web 4a forms the ceiling of chamber 4o - and thus presses the unit, with the underside facing the path of movement of the slider 33 on the Web edges 42.

The leaf spring 6 is fastened to the right section of the slide 5. The leaf spring 6 carries a screw-attached stop cam at its projecting free end 61. It lies with the broad side on the underside of the carriage 5 and is attached to this by a threaded screw 53. The leaf spring lies here 6 at the same time with their side edges on the web edges 42 of the slide rail 4 on. To form a suitable, varying over the length of the leaf spring 6 The leaf spring 6 has bending rigidity in the longitudinal direction of the leaf spring 6 extending recesses 75.

The stop cam 61 attached to the free end of the leaf spring 6 is between the web edges 42 and protrudes into the lower chamber 4u in the path of movement of the slider 33, not shown. The cam 61 is in longitudinal section triangular. It has a steeper inclined surface 61b on the right and a flatter inclined surface 61a on the left-hand side for the slider 33 in the locking position. With the flatter surface 61a the slider 33 cooperates 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 step-shaped stop 62 forms one with a vertical step section Stop surface to limit the horizontal movement of the in the upper chamber 4o guided, designed as a slide blocking member 7. At the same time, the assigned horizontal staircase section as a support surface against deflection the leaf spring 6 at this point. The support surface acts with that in the Chamber 4o guided and described below blocking member 7 together.

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

Between the web 54 and the leaf spring 6 is designed as a slide 7 Blocking member in the upper chamber 4o guided axially. The blocking member 7 is adapted in its dimensions to the width of the upper chamber 4o. It engages with corresponding longitudinal edges formed on its sides Guide edges 44 on the inside of the upper chamber 4o. Preferably is the blocking member 7 made of plastic.

The end of the blocking member 7 facing away from the slide 5 acts in the locking position supporting with the stop 62 on the leaf spring 6 together. This Carriage end is as a bearing cage 71 for two rolling elements lying vertically one above the other 78 trained. The rolling elements 78 are in rolling connection with one another and the lower of the two rolling elements 78 acts with that attached to the leaf spring 6 Stop 62 together by rolling on this. The top of the two Rolling element 78 interacts with the tongue 54a by rolling on it. to Storage of the rolling elements 78, the blocking member 7 has two on the outer sides integrally formed legs 76 (Figure 4), which over the front end of the blocking member 7 protrude, being on the side walls 4b of the upper chamber 4o issue. Seen from above, the two legs 76 thus make a U-shaped one Completion of the blocking member 7 is formed.

Each of the two legs 76 has two horizontal bores one above the other 77 for mounting the two rolling elements 78. The rolling elements 78 are before mounting the blocking member 7 from one of its side surfaces in the holes 77 inserted so that the ends of the rolling elements 78 left and right in the protruding legs 76 of the blocking member 7 are received while the center area of the rolling elements 78 is exposed from above and below. The holes 77 of each leg 76 directly adjoin one another so that the rolling elements 78 contained therein are in rolling connection.

FIG. 5 shows a section along line VV in FIG. 4 in the area of the rolling elements 78. In this illustration, the upper of the two rolling elements 78 rests 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 made narrower than the web 54 so that it can engage between the legs 76 in the bearing cage 71 of the blocking member 7 and comes into contact with the upper rolling element 78.

Overall, the two rolling elements 78 and the result via the stop 62 on the upper boundary web 4a of the chamber 4o a tongue 54a continuous support of the leaf spring 6, which is therefore not at this support point more can be bent. Only in the remaining area between the support and the stop cam 61, the leaf spring 6 a Experience deflection, but their effective bending stiffness increases. This means that a much higher force is required to achieve a deflection must be applied as if the entire spring length is available for bending would stand. The force of the under the action of the closer spring against the steep stop bevel 61b of the stop cam 61 approaching slide 33 is sufficient then no more to bend the leaf spring 6. The slider 33 will blocked by the stop cam 61 and the door 1 is thereby in the open position detected.

A rod-shaped piezo element 8 as a control element is used as a slide trained movable blocking member 7 held in its locking position. The Piezo element is designed as a piezo bender 8 and with beneath the web 54 attached to the carriage 5 at one end. 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 contributes to a bevelled nose 81 Support on a complementary projection 74 of the blocking member 7th

In the position shown, the piezo bender 8 is under tension and is linear aligned. When the voltage is switched off, the free end of the Piezobiegers 8 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. Der Chamfering the nose 81 prevents tilting relative to the projection 74, which is pressed under the force of a return spring 9 against the nose 81 becomes.

After release by the piezo bender 8, the blocking member 7 is released under the effect of Return spring 9 in Figure 3 moved to the left in the direction of the carriage 5. The Return spring 9 is located in a recess 75 on the top of the blocking member 7, on the one hand on the left end face of the recess 75 slide-resistant 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 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 stop 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 relaxes Leaf spring 6 and is back in its starting position. However, that is Blocking member 7 is still in its release position facing the carriage 5. Only when the door 1 is next opened is the blocking member 7 through the slider 33 during its rightward movement from its release position moved to its locking position. For this is on the underside of the blocking member 7 a U-shaped driver 72 is formed, which with a beveled Driving cams 73 in the lower chamber 4u and thus in the movement path of the slider 33 protrudes. In his right-wing movement the slider 33 comes into contact with the driver cam 73 and thereby pushes the blocking member 7 with compression of the return spring 9 to the right in front of it ago. As soon as the blocking member 7 with the rolling element 78 on the stop 62 of the Leaf spring 6 runs up, the movement of the blocking member 7 is stopped. Provided furthermore, an opening force is exerted on the door 1, the slider 33 deforms by the force exerted on the driver cam 73, the driver who is resiliently bulges upwards 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 the leaf spring 6 in Deflects counterclockwise. 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 must do this 8 are energized again. The live piezo bender 8 straightens straight and the nose 81 snaps in front of the projection 74 of the extremely right position blocking member 7, whereby this in the locking position is blocked.

When the door 1 is closed, the slider 33 comes in its left-hand movement with the steeper stop surface 61b of the stop cam 61 in contact. 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 such that when the door closer 3 is acted upon by the door closer 3, the torque it is not sufficient for the slider 33 to deflect the stop cam 61 and the door 1 is closed further. The door 1 thus remains locked in the stop position.

A further closing can only take place if the detection is switched on if a greater torque is applied to the door 1, for example if the Door 1 is closed by hand. The slider 33 passes the stop cam 61 by moving it by the increased force while pivoting the leaf spring 6 deflects counterclockwise upwards.

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

To release and close door 1, the power supply control element, i.e. of the piezo bender 8 interrupted, which thereupon the carriage 5 releases. The carriage 5 moves as already described under the effect of Return spring 9 to the left and provides support in the area of the stop 62 the leaf spring 6 free. The leaf spring 6 can now be applied with less effort be bent over their entire length. Under the action of the door closer 3 the slider 33 passes the stop cam 61 by pivoting it the leaf spring 6 deflects counterclockwise upwards

Advantages of this design result from the interposition of the as Slide trained blocking member 7 between leaf spring 6 and piezo bender 8th Although only a very small force to support the blocking member 7 the piezo bender 8 is required, prevented as a result of the support of the leaf spring 6 by the blocking member 7 a high force the deflection of the spring 6 through 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 rolling is possible without overcoming a high static friction. This allows it also the return spring 9, which for the release movement of the blocking member 7 responsible is relatively small.

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

FIG. 7a shows an exemplary embodiment according to FIGS. 2 to 5 with a two-armed lever 82 for further reduction of the force between the blocking member 7 and the 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. Therefore, no explanation is given here.

Instead of a projection 74 on the blocking member 7, which in Figure 3 with the beveled The nose 81 cooperating at the free end of the piezo bender 8 is shown in the figure 7a interposed a two-armed lever 82. The lever 82 is below the Leaf spring 6 rotatably mounted counterclockwise about a horizontal axis. The bearing axis is fixed in the slide. A first angled in an L-shape and lever arm 82a directed to the left is supported by a horizontal one L-leg on the nose 81 of the piezo bender 8. Complementary to the The nose 81 is also chamfered on the front surface of the lever arm 82a.

A second lever arm, also angled in an L-shape and pointing to the right 82b is supported with a horizontal L-leg on the end face of the blocking member 7 from. The first L-leg 82a is about three times as far from that Removed axis of rotation, like the second L-leg 82b, so that accordingly a power reduction of 3: 1 results. 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 must reduce the number Frictional forces are overcome. This allows even smaller, more energy efficient Use piezo elements.

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

As already described under Figure 6, the blocking member 7 when opening the door 1 moved right again to its locking position. A not shown Bending spring on the axis of the two-armed lever 82 ensures that this lever rotates clockwise from its tilted position shown in FIG. 7b and turns moved into its upright position shown in Figure 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. The stop cam 61 for the slider 33 is not fixed in this embodiment at the end of the leaf spring 6, but in the middle of 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 C-shaped, but only is fixed at its right-hand end to the blocking member 7, while the left end protrudes 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 carriage 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. When the blocking member 7 is forced to move to the right, this plastic tab 79 meets a bevel 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 is in this embodiment 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 two movable Has jaws 92 as a U-leg (Figure 11). The jaws 92 are on the two side surfaces of the upper chamber 4o of the slide rail 4. The Control element 8 and the jaws 92 take approximately the entire height of the upper chamber 4o.

Between the free ends of the jaws 92 is a longer lever arm 65a a two-armed pivot lever 65 added. The pivot lever 65 is on a rotary bearing 67 about a horizontal axis in Figure 10 rotatable stored. The pivot bearing 67 is as shown in Figure 11 on the circuit board 56 supported in a support body 68. The support body 68 also takes 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 FIG. 10 into the movement path of the slide rail 4 in the lower chamber 4u guided sliding body 33, which with the sliding arm of the door closer, not shown connected is. In this position, the sliding body 33 through the Swing lever 65 blocked.

Depending on the functional state of the control element 8, the lever arm 65a determined or released by the jaws 92. That as a piezo element trained control element 8 and the jaws 92 are so together connected that the in the de-energized initial state of the piezo element 8 Jaws 92 have a small V-shaped outward so that the between the lever 92 located lever arm 65a is released. The long Lever arm 65a can thus pivot down between the jaws 92, the opposite short lever arm 65b pivots up and releases the sliding body 33. To facilitate this process, the instruct the Surfaces of the clamping jaws 92 facing lever arm 65a have a bevel 92a on. In addition, the corresponding counter surface on the lever arm 65a can also be chamfered be trained. To the friction losses between the sliding body 33 and to minimize the pivot lever 65 is the free end of the pivot lever formed as a roller 66 which cooperates with the sliding body 33.

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

The bevels 92a at the ends of the jaws 92 also allow overpressing the sliding body 33 and forcing the door to close energized control element 8 and blocked pivot lever 65. By application a corresponding force on the sliding body 33, the jaws 92 pushed apart by the lever arm 65a. The bevels 92a allow a suitable power transmission without causing damage comes to the blocking member 91.

On the circuit board 56 there are, in addition to other electronic ones, not shown Components also a plug contact 58, a potentiometer 57 and two reed switches 59a, 59b arranged. The plug contact 58 is used to power the Locking device and connection to control electronics. Via the potentiometer can the supply voltage of the control element 8 and thus its Deflection can be varied. In this way, the jaws 92 Set the holding forces exerted on the swivel lever 65. The Reed switches 59a, 59b serve to change the current position of the slider 33 determined. The reed switches 59a, 59b are switched on by a Top of the sliding body 33 attached permanent magnet 34 triggered.

When the door is opened, the sliding body 33 first releases the left reed switch 59a out, whereupon the control element 8 is de-energized to the sliding body 33 to allow trouble-free passage of the pivot lever 65b. in this connection the lever arm 65b is pushed up. If the slider 33 continues to move, the leaf spring presses the lever arm 65b down again. When reached the right reed switch 59b, the control element 8 is energized again and the Swing lever 65 found. The reed switch 59b signals that the Slider 33 is in the locking position. Likewise, through the reed switch 59a, 59b an overpressing and forced closing of the door leaf is detected are triggered when the reed switch 59a is triggered despite the energized control element 8 becomes. Any inactive leaf can then also be unlocked become.

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.

The basic structure of the printed circuit board 56 on which the blocking member 91 ends is also arranged corresponds to the embodiment in FIGS. 10 and 11. A plug contact 58 is used to connect the voltage supply and the control lines, The supply voltage of the control element is via a potentiometer 57 8 adjustable and two reed switches 59a, 59b detect the position 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 is 66 stored in a cuboid roller cage 70, which under the action of a leaf spring 93 mounted on the printed circuit board 56 into the movement path of the sliding body 33 is pushed. The roller cage 70 is in the upper chamber 4o Slide rail 4 mounted vertically. The roller cage 70 is supported with a support roller 69 on a support body 68 mounted on the printed circuit board 56 from. The support roller 69 and the stop roller 66 are at opposite ends the roller cage 70 arranged.

In the release position of the control element 8, the roller cage 70 can be moved through the Sliding body 33 against the force of the leaf spring 93 between the two clamping jaws 92 of the blocking member 91 are pressed down. A bevel 68a the upper edge of the support body 68 facilitates the rolling of the support roller 69 and hence the depression. In the locking position of the control element 8 when the Jaws 92 are oriented slightly inwards, this alternative is possible blocked and the sliding body 33 remains locked. The axes of rotation of the Support roller 69 and the stop roller 66 are to optimize the power transmission arranged in a plane that is at an acute angle to the horizontal forms. In this way, the blocking member can be used with little force Achieve 91 large restoring forces on the sliding body.

Allow chamfered edges 92a on the top of the jaws 92 nevertheless an overpressure of the sliding body 33 and a forced closing the door with energized control element 8 and blocked roller cage 70. By Applying a corresponding force to the sliding body 33 Jaws 92 are pushed apart by the roller cage 70. The bevels 92a allow a suitable power transmission without it Damage to the blocking member 91 comes.

The reed switches 59a, 59b serve to change the current position of the slider 33 determined. The reed switches 59a, 59b are switched on by a Top of the sliding body 33 attached permanent magnet 34 triggered. When the door is opened, the sliding body 33 first releases the left reed switch 59a out, whereupon the control element 8 is de-energized to the sliding body 33 to enable easy pressing down of the roller cage 70. If the The sliding body moves further, the leaf spring 93 presses the roller cage 70 again into the lower chamber 4u. If the slider 33 the right reed switch 59b reached, the control element 8 is energized again and the roller cage 70 is determined. The reed switch 59b signals that the sliding body 33 is in the locking position befindent. Overpressure can also be caused by the reed switches 59a, 59b and forced closing of the door leaf can be detected if despite being energized Control element 8 of the reed switch 59a is triggered. A possibly Existing passive leaf can then also be activated.

List of reference numbers

1

door

11

door

2

frame

3

door closers

31

closer shaft

32

sliding arm

33

Sliding body, glider

34

magnet

4

slide

4a

limiting web

4b

side panel

40

upper chamber

4u

lower chamber

41

slot

42

Landing Edge, Landing Edge

43

opening

44

guide edges

5

Sled, sled body

51

threaded hole

52

screw

53

screw

54

web

54a

tongue

55

abutment

56

circuit board

56a

clamping screw

57

potentiometer

58

plug contact

59a, 59b

Reed switch

6

leaf spring

61

Stop cams, cams

61a

flat sloping surface

61b

steep inclined surface

62

attack

63

rivet

64

slope

65

pivoting lever

65a

long lever arm

65b

short lever arm

66

stop roller

67

pivot bearing

68

support block

69

supporting role

70

roller cage

7

blocking member

71

bearing cage

72

takeaway

73

driver cams

74

head Start

75

recess

76

leg

77

drilling

78

rolling elements

79

flap

8th

Piezo bender, control

81

nose

82

lever

82a, 82b

lever arm

83

connection contact

9

Return spring

91

blocking member

92

jaws

92a

bevel

93

leaf spring

Claims (39)

1. A blocking apparatus for a door (1) provided with a door closer (3)
   comprising a sliding arm (32) arranged between a door leaf (11) and a fixed-position door frame (2) and a rail (4) in which the sliding arm (32) is guided,
   wherein the sliding arm (32) is supported, preferably hinged, at its one end at the door leaf (11) or at the door frame (2), and is displaceably guided with its other end in the rail (4) arranged at the door frame (2) or at the door leaf (11) respectively,
   and comprising a movable stop (61) which is arranged in the region of the rail (4), which cooperates with an electrically switchable control element (8), which cooperates with the sliding arm (32) and which is arranged in the rail (4) in a position associated with a specified blocking angle of the door leaf (11),
   characterized in that the control element (8) has a piezo-electrical element or a magnetostrictive element or a thermostrictive element or a shape-memory element; and
   in that a blocking element (7, 91) acts between the control element (8) and the stop (61, 66), with the control element (8) actuating the blocking element (7, 91) and with the blocking element (7, 91) releasing the stop (61, 66) or blocking it in a blocked position.
2. A blocking apparatus in accordance with claim 1, characterized in that the control element (8) has a piezo stack which is preferably formed as a piezo-bender supported at one end or preferably as a piezo turning block supported radially or centrally.
3. A blocking apparatus in accordance with claim 1 or claim 2, characterized in that the control element (8) executes a bowing movement and/or an extension movement.
4. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the blocking element (7) is formed as a slide member axially movably mounted in the region of the rail (4).
5. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the control element (8) cooperates with the blocking element (7), which is preferably formed as a slide member and which in turn cooperates with the stop (61) and is displaceable between a support position and a release position.
6. A blocking apparatus in accordance with any one of the preceding claims, characterized in that, in a first position, the control element (8) blocks the axial movement of the blocking element (7) which is preferably designed as a slide member and, in a second position, releases the axial movement of the blocking element (7) which is preferably designed as a slide member.
7. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the control element (8) is secured at one end in a mounting member, preferably a carriage member (5), with an abutment surface (81) for the blocking element (7), which is preferably formed as a slide member, being formed at the free end of the control element (8).
8. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the control element (8) extends horizontally projecting in a chamber (4o) which is clamped at one end of the rail (4).
9. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the abutment surface of the control element (8) is formed in a chamfered manner and cooperates in the blocked position of the control element (8) with a projection (74) of a complementary shape at the blocking element (7), which is preferably formed as a slide member.
10. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the blocking element (7), which is preferably formed as a slide member, has a preferably flexurally elastic driver (72) which projects into the path of movement of the slider (33) and cooperates with this at least during the opening of the door (1).
11. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the blocking element (7) is formed as a reversibly deformable element (91) which cooperates indirectly or directly with the movable stop (66).
12. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the blocking element is formed as a clamping device (91).
13. A blocking apparatus in accordance with any one of the preceding claims, in particular with claim 12, characterized in that the control element (8) cooperates with the blocking element (91) mounted in the region of the rail, or is formed as a part of the blocking element (91), with the blocking element (91) blocking the stop (66) indirectly or directly in a first position and releasing the stop (66) in a second position.
14. A blocking apparatus in accordance with any one of the preceding claims, in particular with claim 12 or claim 13, characterized in that the blocking element (91) has a U-shaped design, with the U limbs being formed as clamping jaws (92) and a free space remaining between the U limbs (92).
15. A blocking apparatus in accordance with claim 13 or claim 14, characterized in that when the control element (8) is energized, the U limbs (92) of the blocking element (91) move towards one another and, when the control element (8) is not energized, move away from one another, or vice versa.
16. A blocking apparatus in accordance with claim 14 or claim 15, characterized in that a region of the stop (66) is vertically displaceably guided in the rail (4) between the U limbs (92) of the blocking element (91).
17. A blocking apparatus in accordance with any one of claims 14 to 16, characterized in that the stop (66) is formed at a first lever arm (65b) of a two-armed pivotal lever (65), with a second lever arm (65a) being vertically displaceably guided between the U limbs (92) of the blocking element (91).
18. A blocking apparatus in accordance with claim 17, characterized in that the pivotal lever (65) is rotationally movably mounted in the rail (4), and is preferably rotationally movable about an axis (67) perpendicular to the direction of movement of the slider (33).
19. A blocking apparatus in accordance with any one of claims 13 to 19, characterized in that the U limbs (92) and/or the lever arm (65a) of the pivotal lever (65) have mutually confronting inclined surfaces.
20. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the blocking element (7), which is preferably formed as a slide member, is supported against the force of a resetting spring (9) or the like acting in the direction of the release position.
21. A blocking apparatus in accordance with claim 20, characterized in that the resetting spring (9) is mounted in a cutout (75) of the blocking element (7) preferably formed as a slide member, with it being fixedly supported with respect to the slide member at an end wall of the cutout (75) at one end and being fixedly supported with respect to the rail or with respect to the carriage at the abutment (55) which preferably engages into the cutout (75), at the other end.
22. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the movable stop is forced into the range of movement of the sliding arm under the action of a spring element (6).
23. A blocking apparatus in accordance with claim 22, characterized in that the spring element is formed as a leaf spring (6) and the control element (8) cooperates indirectly or directly with the leaf spring (6), with it preferably being provided that the leaf spring (6) is supported by the blocking element (7) in the support position of the blocking element in the direction of bending.
24. A blocking apparatus in accordance with claim 23, characterized in that the stop (61) is arranged in the end region of the leaf spring (6) and the support of the leaf spring (6) takes place in its central region, or vice versa.
25. A blocking apparatus in accordance with claim 23 or claim 24, characterized in that, in its support position, the blocking element (7), which is preferably formed as a slide member, contacts the leaf spring (6) or a support surface (62) mounted on the leaf spring (6) at the one end and is supported at the rail (4) or at a component fixed with respect to the rail at the other end.
26. A blocking apparatus in accordance with any one of claims 23 to 25, characterized in that a slide member stop (62) is formed at or secured to the leaf spring (6) and limits the horizontal movement of the blocking element (7), which is preferably formed as a slide member, in the one chamber (4o) in a direction of movement away from the control element (8).
27. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the slide member stop (62) forms a support surface for a support of the blocking element (7), which is preferably formed as a slide member, in the vertical direction.
28. A blocking apparatus in accordance with any one of claims 23 to 27, characterized in that the leaf spring. (6) has a varying bending strength over its length.
29. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the blocking element (7), which is preferably formed as a slide member, has two rolling elements (78), with it preferably being provided that the rolling elements are rotatably mounted about a horizontal longitudinal axis in bores (77) of the blocking element (7),which is preferably formed as a slide member.
30. A blocking apparatus in accordance with claim 29, characterized in that the rolling elements (78) are in rolling contact with one another.
31. A blocking apparatus in accordance with claim 29 or claim 30, characterized in that one of the rolling elements (78) contacts the leaf spring (6) or a support surface, for example a slide member stop (62), mounted on the leaf spring (6) in the support position of the blocking element (7) and the other rolling element (78) contacts the upper side of the one chamber (4o) or a support element (54a) arranged in the chamber (4o).
32. A blocking apparatus in accordance with any one of claims 29 to 31, characterized in that a freely projecting web (54) is secured to the mounting member, preferably to the carriage member (5), with the web (54) contacting the upper side of the one chamber (40) and forming a roll-off surface for a rolling element (78).
33. A blocking apparatus in accordance with claim 32, characterized in that an abutment for the resetting spring (9) is formed in or at the web (54).
34. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the abutment is formed as a stop nose (61) with a flatter stop surface (61a) and a steeper stop surface (61b), with the slider (33) guided in the rail cooperating 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.
35. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the abutment (66) is formed as a roller.
36. A blocking apparatus in accordance with any one of the preceding claims, characterized in that the rail (4) is formed as a dual chamber housing having two parallel chambers (4o, 4u) which mutually communicate via an opening (43).
37. A blocking apparatus in accordance with claim 36, characterized in that a slide element or roller element (36) connected to the sliding arm (32) is guided in the one chamber (4u) and the control element (8) is arranged in the other chamber (4o).
38. A blocking apparatus in accordance with claim 36 or claim 37, characterized in that a mounting member, preferably a carriage member (5), can be fixed in place in the housing of the rail (4), preferably in the one chamber (4o), in a selectable position, for example via a clamping screw, with the control element (8) and/or the spring element (6, 93) being mounted on or in the mounting member (5).
39. A blocking apparatus in accordance with any of claims 36, to 38, characterized in that the spring element (6, 93) is secured at one end, preferably in a horizontally projecting manner, in a mounting member arranged in the housing of the rail (4), preferably in the carriage member (5).

Images