EP0398196A2 - Door holder with adjustable holding force - Google Patents

Abstract

What is described is a stopping device for a door with a sliding-arm door closer, the sliding arm 2 interacting with a holding unit 10 mounted in the sliding rail 3. To adjust the holding force, according to the invention the holding unit 10 has a lever 20, the effective lever arm of which is variably adjustable. The lever is designed as a leaf spring mounted on one side in a bearing block, a spring-supporting device (35) adjustable along the leaf spring being provided. <IMAGE>

Description

The invention relates to a locking device according to the preamble of claim 1.

Such a device is known from DE-OS 36 04 083. The stop is formed at one end of a two-armed lever which is held in the stop position under the action of a helical compression spring. The disadvantage here is that the device is relatively complicated and the adjustment of the holding force is only possible in a very limited range.

The invention has for its object to form a simply constructed device which has a large adjustment range of the holding force.

The invention solves this problem in that the holding unit has a lever, the effective lever arm is variably adjustable. The effective lever arm can be varied by adjusting the distance between the lever joint and the point of attack of the stop on the lever. The stop is preferably attached to the free end of the lever. The triggering torque can be constantly set by a spring. For example, the lever can be designed as a leaf spring or as a rigid lever which is acted upon by a compression spring or the like at a predetermined point. The lever can also interact with an electromagnet, which determines the triggering torque. By adjusting the effective lever arm, at the end of which the stop acts, the holding force or the force required to trigger the detection can be varied even with a constant triggering torque.

In preferred embodiments, the position of the lever joint along the lever arm is adjustable. Simple designs result if the lever is designed as a leaf spring mounted on one side in a bearing block in the rail. Designs are possible in which the leaf spring is adjustable in its longitudinal direction relative to the bearing block and designs in which a spring support device adjustable along the leaf spring is provided.

The spring support device can have a slider which can be adjusted along the leaf spring, the slider cooperating with the leaf spring at one end and being fixable in the rail on the bearing block at its other end.

In further versions it is provided that the position of the stop cam can be adjusted along the lever arm. The effective lever arm is varied by adjusting the stop cam.

In preferred embodiments with an adjustable lever arm, the locking device is thereby rendered practically ineffective by adjusting the maximum length of the lever arm.

In order to be able to switch off the detection without having to adjust the length of the effective lever arm and thus the holding force, a switch device is provided in preferred embodiments, which has a holder which engages in a switching position on the stop cam or a connected part around the stop cam to keep out of the trajectory of the glider.

Further features and advantages result from the exemplary embodiments which are explained in more detail below with reference to the figures.

Selected exemplary embodiments of the invention are shown in the figures.

• Figur 1 eine perspektivische Darstellung eines Aus­führungsbeispiels in Verbindung mit einem Gleit­armtürschließer bei in Offenstellung festge­stellter Tür;
• Figur 2 eine Detailansicht eines ersten Ausführungs­beispiels, Schnitt parallel zur Türebene durch das Schienengehäuse entlang Ebene II in Figur 1;
• Figur 3 eine Draufsicht in Figur 2;
• Figur 4 eine Teilansicht in Figur 2 einer Variante des ersten Ausführungsbeispiels;
• Figur 5 eine Detailansicht eines zweiten Ausführungs­beispiels, Schnitt entsprechend Figur 2;
• Figur 6 eine Draufsicht in Figur 5;
• Figur 7 eine Detailansicht eines dritten Ausführungs­beispiels, Schnitt entsprechend Figur 2;
• Figur 8 eine Draufsicht in Figur 7;
• Figur 9 eine Detailansicht eines vierten Ausführungs­beispiels, Schnitt entsprechend Figur 2;
• Figur 10 eine Draufsicht in Figur 9;
• Figur 11 eine Detailansicht eines fünften Ausführungs­beispiels, Schnitt entsprechend Figur 2;
• Figur 12 eine Detailansicht eines sechsten Ausführungs­beispiels, Schnitt entsprechend Figur 2;
• Figur 13 eine Detailansicht einer Zusatzeinrichtung zum Aus-/Einschalten der Feststellung, Schnitt entsprechend Figur 2;
• Figur 14 eine Draufsicht in Figur 13.

Show:

• Figure 1 is a perspective view of an embodiment in connection with a sliding arm door closer with the door locked in the open position;
• FIG. 2 shows a detailed view of a first exemplary embodiment, section parallel to the door plane through the rail housing along plane II in FIG. 1;
• Figure 3 is a plan view in Figure 2;
• Figure 4 is a partial view in Figure 2 of a variant of the first embodiment;
• Figure 5 is a detailed view of a second embodiment, section corresponding to Figure 2;
• Figure 6 is a top view in Figure 5;
• Figure 7 is a detailed view of a third embodiment, section corresponding to Figure 2;
• Figure 8 is a top view in Figure 7;
• Figure 9 is a detailed view of a fourth embodiment, section corresponding to Figure 2;
• Figure 10 is a plan view in Figure 9;
• Figure 11 is a detailed view of a fifth embodiment, section corresponding to Figure 2;
• Figure 12 is a detailed view of a sixth embodiment, section corresponding to Figure 2;
• FIG. 13 shows a detailed view of an additional device for switching the detection on / off, section corresponding to FIG. 2;
• FIG. 14 is a top view in FIG. 13.

In the illustrated embodiments, the locking device according to the invention is used in conjunction with an overhead door closer 1 with a sliding arm 2. The slide arm 2 is guided in a rail 3, in which a holding unit 10 which interacts with the slide arm 2 is integrated.

As FIG. 1 shows, the door closer 1 is mounted with its housing 4 on the door leaf 5 and the rail 3 on the door frame 6. In other corresponding versions, this can also be reversed, so that the door closer housing is attached to the frame and the rail on the door leaf.

The door closer 1 is a conventional sliding arm door closer with hydraulic damping. A drive unit (not shown) and a driven closer shaft 7 are mounted in the door closer housing 4. The drive unit consists of a hydraulic piston-cylinder unit and the drive-connected closer shaft.

The closer shaft 7 is non-rotatably connected to the slide arm 2 at its outer end. The free arm 2 is guided with its free end in the rail 3. The rail 3 is designed as a multi-chamber rail. The sliding arm 2 is guided in one chamber and the holding unit 10 is arranged in another chamber. The chambers can be arranged vertically one above the other as in the illustrated exemplary embodiments, but they can also be formed vertically next to one another.

The various exemplary embodiments of the holding unit 10 are explained below with reference to the figures.

The holding unit 10 in FIGS. 2 and 3 is arranged in the upper chamber 11. In the adjoining lower chamber 12, the slide arm 2 is guided with the slider 14. Two opposite web edges 13 are arranged between the chambers 11, 12. These limit an opening 11 a extending in the longitudinal direction, with which the chambers 11, 12 are connected to one another.

The chamber 11 has a slot 12 a accessible from below, into which the sliding arm 2 engages with the slider 14 from below. The slider 14 is designed as a sliding block, but can also be designed as a roller.

The holding unit 10 consists of a bearing block 15 arranged in the chamber 11 and a leaf spring 20 which is fastened on one side to the bearing block and which carries a stop cam 21 at its projecting free end. The top of the leaf spring 20 rests on the lower bearing surface of the bearing block 15 and is fastened to the bearing block via a riveted connection 28.

The leaf spring 20 lies with its side edges on the webs 13. The stop cam 21 attached to the free end of the leaf spring 20 projects into the lower chamber 12 into the movement path of the slider 14. The cam 21 is triangular in longitudinal section. It has a steeper inclined surface 21 a on the left and a flatter inclined surface 21 b on the right side. The surface 21 a forms the stop surface for the slider 14 in the locking position. With the surface 21 b, the slider interacts when the door is opened.

The bearing block 15 has a solid, flat body, which rests with the underside at its edges on the rail webs 13. A vertical threaded hole 26 for receiving a clamping screw 27 is drilled into the bearing block 15. The clamping screw 27 is supported with the pointed tip at its upper free end on an upper boundary web 31 or the upper cover wall of the chamber 11 and thus presses the bearing block 15 onto the rail webs 13. The assembly 10 can be in a selectable position in the rail the clamp 27 can be determined.

To set the holding force of the exemplary embodiment in FIGS. 2-4, a spring support part designed as a slide 35 is provided. The slide 35 is arranged between the leaf spring 20 or the bearing block 15 and the upper boundary wall 31. It consists of a leaf spring 36 which has at its left end a bearing plate 37 which is adapted in cross section between the leaf spring 20 and the boundary wall 31 and forms the spring support. With the right section, the leaf spring 36 rests on the top of the bearing block 15. There it has an elongated hole 38 through which the clamping screw 27 extends.

On both sides of the elongated hole 38 there is a latching device 40 for fixing the leaf spring on the bearing block 15. This device 40 consists of peg-shaped cams 41 on the upper side of the bearing block 15, which engage in corresponding holes 42 in the leaf spring 36. The leaf spring is bent slightly downward in the right section, so that it engages automatically in the catch 40.

The variant in FIG. 4 shows a somewhat modified latching device 40. In this embodiment, a cam 43 is attached to the bearing block 15 in the area of the clamping screw 27, which engages in the elongated hole 38 of the leaf spring and its external toothing 44 interacts with a toothing 45 of the elongated hole.

In both variants in FIGS. 2-4, the end of the slide 35 protruding beyond the bearing block 15 forms the actuating end 39. This can be formed by an angled section at the end of the leaf spring 36 or an actuating cam attached to the end of the slide 35 or the leaf spring 36 be. At this actuation end, the leaf spring 36 is pushed up to unlock and can then be moved to adjust the holding force. The holding force is reduced by extending the effective lever arm by moving the slide 35 to the right. The bearing plate 37, that is the position of the support of the leaf spring 20, is adjusted. An increase in the holding force can be obtained by shortening the lever arm by moving the slide 35 to the left.

The locking device works as follows:

When opening the door 5, the closer 14 slides in the illustration in FIG. 2 from right to left and vice versa when closing.

When the door 5 is opened, the slider 14 passes the stop cam 21 by engaging the inclined surface 21 b and deflecting the leaf spring 20 in a clockwise direction. The door can then be opened further. The slider 14 passes underneath the locking device 10 unhindered.

When the door 5 is closed, the slider 14 comes into contact with the stop surface 21 a. The holding force can be adjusted by adjusting the position of the slide 35 in such a way that the door acted upon by the door closer remains in the stop of the slide 14 on the stop cam 21, but the determination can easily be released by closing the door by hand. When the door is closed, the slider 14 passes the stop cam 21 by deflecting it upwards while pivoting the leaf spring 20 in a clockwise direction.

The other exemplary embodiments shown are similar in structure and function to the previously described exemplary embodiment in FIGS. 2-4. The same components have the same reference numbers.

In the exemplary embodiment in FIGS. 5 and 6, an intermediate plate 55, which is adjustably arranged between the leaf spring and the bearing block, is provided to adjust the holding force. The intermediate plate can be designed as a rigid plate or as a leaf spring. It lies with the underside in its entire length on the leaf spring 20. With part of its upper surface it bears against a bearing surface of the bearing block 15 facing downward. As in the previous exemplary embodiment, the leaf spring 20 is also fixed on the bearing block 15 via a rivet connection 28. The intermediate plate 55 has an elongated hole 58 through which the rivet 28 extends. At the right end of the intermediate plate 55, a locking pin 60 is riveted, which engages in a locking recess 61 in the leaf spring 20. The locking recess 61 is delimited by two opposing axial tongues 62, 63 cut out in the leaf spring and having locking notches 64 at opposite points. The locking pin 60 locks between two opposite notches 64.

In order to set a stronger holding force, the intermediate plate 55 is shifted to the left; it is shifted to the right to reduce the holding force. For the adjustment, the plate 55 must be released from the latching. This is done by pressing the plate 55 with its right end in the direction of arrow 65 or 66, thereby deflecting the tongue 62, 63 to such an extent that the locking pin 60 is released.

If the intermediate plate 55 is designed as a rigid plate, it acts in a manner corresponding to the bearing plate 37 of the slide 35 in FIGS. 2-4. If a leaf spring is used as the intermediate plate 55, the same effect results as with the rigid plate. Due to the spring properties of the leaf spring plate 34, the effect is compensated to a certain extent, so that a better fine adjustment is possible.

In the exemplary embodiments in FIGS. 7-10, the leaf spring 20 in the bearing block 15 is axially displaceable in order to adjust the holding force. The leaf spring 20 lies on the underside with its side edges on the rail webs 13. With the upper side facing the bearing block 15, it bears against a bearing surface of the bearing block 15 facing downward.

The adjustment and locking of the leaf spring 20 takes place in the embodiment of FIGS. 7 and 8 via a pinion 70 mounted on the bearing block 15, which engages in an axial recess 71 in the leaf spring 20 and interacts with a toothed longitudinal edge 72 of the recess. On the end face of the gearwheel 70 facing away from the bearing block 15, a projecting head 73 is arranged which engages over the longitudinal edges of the recess 71 in order to connect the leaf spring 20 and the bearing block 15 and to determine the gearwheel 70 in an optionally adjustable rotational position.

When the gear 70 rotates clockwise, the leaf spring 20 is shifted to the right, thus shortening the effective lever arm, which results in an increase in the holding force. When turning counterclockwise, the leaf spring 20 is shifted to the left, thereby lengthening the lever arm and reducing the holding force.

In the exemplary embodiment in FIGS. 9 and 10, a latching cam 75 which is resiliently mounted on the bearing block 15 is provided for latching the leaf spring 20. The locking cam 75 is mounted on the free end of a leaf spring-like locking spring 76 riveted to the bearing block 15.

The detent spring 76 is arranged between the bearing block 15 and the leaf spring 20 in a recess 77 in the bearing block 15. The cam 75 engages in an axial recess 78 of the leaf spring 20. It has a toothing 79 on the axial side walls, which interacts with a toothing 80 on the longitudinal edges of the recess 78.

To adjust the holding force, the latching 79, 80 must first be released by the locking cam 75 using a suitable tool, e.g. B. a screwdriver, is pressed out of the latching into the recess 77, then the leaf spring 20 can be moved with the same effect as in the previous embodiment in Figures 7 and 8. As soon as the latching cam 75 is released, the latching is set automatically under the action of the latching spring 76 in each position of the leaf spring 20.

In the exemplary embodiment in FIG. 11, the position of the stop cam 21 can be adjusted along the leaf spring 20 in order to adjust the length of the effective lever arm. The leaf spring 20 is fixed in the bearing block 15 via a rivet connection 28 as in FIGS. 2 and 4. A tooth catch 85 and a screw connection 86 are used to fasten the stop cam 21 on the leaf spring 20. The tooth catch 85 is formed by a transverse toothing 87 arranged on the underside of the leaf spring 20 and a toothing 88 on the bearing surface of the stop cam 21. The clamping screw 86 is sunk in the stop cam 21. It passes through an axial elongated hole 89 in the leaf spring 20. The clamping is carried out with the aid of a lock nut 90 which overlaps the longitudinal edges of the elongated hole 89.

By moving the stop cam 21 to the left, the effective lever arm is enlarged and the holding force is reduced. Moving the stop cam to the right increases the holding force. The section of the leaf spring 20 provided with the toothing 87 forms the adjustment range of the stop cam 21. It is composed of a horizontal and an angled section. When the cam 21 is displaced in the angled section, the cam 21 is also displaced perpendicular to the movement path of the slider 14 at the same time as the lever arm changes, as a result of which the size of the effective stop surface 21 a, 21 b is also varied. This variation can be determined by the special course of the angled section, which can run straight with a corresponding angle or curved with a corresponding curvature. If the cam 21 is arranged at the outer free end, it lies outside the path of movement of the slider.

The exemplary embodiment in FIG. 12 is constructed similarly to the example in FIG. 11. Instead of the leaf spring 20, however, a rigid lever 120 and a compression spring 121 are provided. In a corresponding manner, the lever 120 is articulated on one side on the bearing block 15. The compression spring 121 is supported on the one hand on the lever arm 120 and on the other hand on the upper boundary wall 31. Adjusting the stop cam 21 produces the same effect as in the previous exemplary embodiment in FIG. 11. The lever 120 can also be designed as a two-armed lever and is supported with the second lever arm on a limit stop on the bearing block 15.

In the exemplary embodiment in FIGS. 13, 14, an additional device 150 is shown, with which a locking device with a holding unit 10 can be switched on and off without the setting of the holding force having to be changed.

The additional device 150 consists of a slide switch 151 with a hook-shaped end 152, which cooperates with the free end of the leaf spring 20 for switching off. The slide switch 151 is mounted in the upper chamber 11, it is supported on the holding unit 10, not shown, preferably on the bearing block 15, and consists of a sheet metal plate, which can be designed in particular as a leaf spring. The width of the slide 151 is adapted to that of the chamber 11 and is somewhat longer than the leaf spring 20. It is arranged so that it projects beyond the holding unit 10 on both sides.

In one switching position, the slide 151 is shifted to the left, so that the hook-shaped end 152 is out of engagement with the leaf spring 20. In this position the detection is switched on. In the other switching position, the slide 151 is shifted to the right, so that the hooks 152 engage under the free end of the leaf spring 20 on both sides of the stop cam 21 and the leaf spring 20 is deflected upwards. In this position, the stop cam 21 is arranged outside the movement path of the slider 14. This means that the detection is switched off in this position.

The switching slide 151 can be fastened by latching on the bearing block 15 in the same way as the latching of the slide 35 in FIGS. 2-4.

In modified versions, the slide switch 151 can also be connected to the slide 35 in FIGS. 2-4, so that with the holding force adjustment in the end position with minimal holding force, the leaf spring 20 is deflected upward and the stop cam is kept out of the movement path of the slide 14.

Claims (12)

1. Locking device for a door provided in particular with a door closer, with a sliding arm arranged between the door leaf and frame, which is articulated at one end to the door leaf or frame and with its other end slidably guided in a slide rail arranged on the frame or on the door leaf and with a holding unit mounted in the rail with a deflectable stop which interacts with the sliding arm, the holding force being adjustable,
characterized in that the holding unit (10) has a lever (20, 120), the effective lever arm of which is variably adjustable. 2. Locking device according to claim 1, characterized in that the position of the stop (21) along the lever arm (20, 120) is adjustable (85). 3. Locking device according to claim 1 or 2, characterized in that the position of the lever joint (35, 55, 15) along the lever arm (20) is adjustable (35, 55, 70, 75). 4. Locking device according to one of the preceding claims, wherein the lever is designed as a leaf spring mounted on one side in a bearing block in the rail, characterized in that an adjustable along the leaf spring spring support device (35, 55) is provided. 5. Locking device according to claim 4, characterized in that the spring support device has a along the leaf spring (20) adjustable slide (35, 55). 6. Locking device according to claim 5, characterized in that the slide (35, 55) cooperates at one end (37) with the leaf spring (20), preferably rests on the leaf spring (20), and at its other end (40, 44) in the rail (3), in particular in the bearing block (15) of the leaf spring, for. B. can be locked (40, 44). 7. Locking device according to claim 5 or 6, characterized in that the slide (35, 55) is designed as a leaf spring slide (35). 8. Locking device according to one of the preceding claims, wherein the lever is designed as a leaf spring mounted on one side in a bearing block in the rail, characterized in that the leaf spring (20) is adjustable in its longitudinal direction relative to the bearing block (15). 9. Locking device according to claim 8, characterized in that the leaf spring (20) on the bearing block (15) can be locked (70, 75). 10. Locking device according to claim 9, characterized in that the leaf spring (20) in a toothing (20, 75) on the bearing block (15) can be locked. 11. Locking device according to claim 9 or 10, characterized in that a toothing is designed as a gear (70). 12. Locking device according to one of the preceding claims, characterized in that a switch device (150) is provided which has a holder (152) which engages in a switching position on the stop (21) or a connected part (20).

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