DE10321405B4 - Locking device for a door provided with a door closer door with a thermal unlocking element - Google Patents

Abstract

Locking device for a provided with a door closer door, with an arranged between the door leaf and door frame sliding arm which is mounted at one end to the door closer and at its other end to a sliding block (1) is pivotally connected, wherein the sliding block (1) in an am Door frame or arranged on the door guide rail (2) is displaceably guided and in a predetermined locking position within the slide rail (1) non-positively and / or positively lockable, characterized in that in the slide shoe (1) a spacer member (5) is arranged, which at a certain ambient temperature (TS), in particular 47 ° C, is thermally deformable or melts, and hereby releases the frictional connection and / or the positive connection.

Description

The present invention relates to a locking device and a suitable sliding shoe for a door provided with a door closer according to the features of the preamble of claim 1 and 14, respectively.

Both from the DE 39 16 216 A1 as well as from the DE 43 05 710 A1 Locking devices for a door with Gleitarmtürschließer are known. The locking device of DE 43 05 710 A1 used to determine an electromagnet so that the determination can be canceled by appropriate control of the electromagnet. The locking device according to the DE 39 16 216 A1 uses only mechanical means for detecting the door or the shoe. Common to both locking devices is that the door opened by means of the locking device does not close automatically in case of fire, unless the device is equipped with a smoke detector.

The DE 199 01 773 A1 discloses a locking device for a door provided with a door closer, in which a stopper for a sliding block by means of a thermostrictive element or a shape memory element is actuated, wherein the aforementioned elements change their shape reversibly with temperature changes.

The DE 44 06 938 A1 discloses a locking device for a door closer, which is deactivated as a result of a temperature increase by means of a shape memory material.

The DE 297 12 127 U1 and the DE 2145 859 A disclose locking devices for door closers in which the determination of a joint is canceled at a predetermined temperature by means of fusible link.

Object of the present invention is therefore to provide a locking device for a Gleitarmtürschließer in a simple manner such that the determination is automatically canceled when reaching a certain ambient temperature, so that the door closes by means of the door closer.

This object is achieved by means of a locking device with the features of claim 1.

The idea underlying the invention is to release the non-positively and / or positively held in the slide by means of the locking device in a certain position shoe with the aid of a thermal element upon reaching a certain ambient temperature by the non-positive and / or positive locking of the Sliding shoe is canceled by a deformation or by changing the state of aggregation of the thermal element. For example, the thermal element can be made of a part made of fused solder, which melts when it exceeds a certain ambient temperature and thus loses its shape. The thermoelastic element of fusible solder can be formed, for example, in this case as a spacer, which in its solid state z. As a brake pad, which is arranged in the shoe, holds in position. Once the ambient temperature exceeds the melting temperature, the spacer melts, whereby the brake pad can change its position relative to the shoe by the positive and / or non-positive connection with the slide rail or disposed thereon spring member is released and the shoe again slide freely in the slide which allows the door closer to close the door.

It is of course possible that the thermal element z. B. may also be a bi-metal spring, which changes its shape by the change in temperature, and thus z. B. releases the brake pad held in position, causing this z. B. can penetrate as in the exemplary embodiments described in a recess of the shoe and thereby the positive and / or non-positive locking is released. The bi-metal spring replaces the spacer according to. the described embodiment.

By the appropriate choice of the thermal properties of the thermal element can be set exactly at which temperature the locking device releases the shoe. In principle, such a thermal element can be provided in any conventional locking device.

Therefore, by way of example only one embodiment will be explained in greater detail below with reference to FIGS.

Show it:

1 : A cross-sectional view of a sliding shoe according to the invention;

2a : Locking device according to the invention in the locked position, wherein the temperature is less than the melting temperature of the spacer member;

2 B : Ambient temperature T greater than melting temperature T _S ;

3a : Cross-sectional view through a slide with therein sliding shoe at a temperature T smaller T _S ;

3b Slide rail with sliding shoe with molten distance member arranged therein;

4a : Side view of the main body of the sliding block;

4b : Top view of the main body of the sliding block;

5a : Top view of the threaded insert of the sliding block;

5b : Sectional view AA according to 5a of the thread insert.

The 1 shows a possible embodiment of a sliding block according to the invention for a locking device according to the invention. The main body 1 the sliding shoe, which is advantageously manufactured as an injection molded part, has a recess 1a on, in which a threaded insert 7 positively locked against rotation rests. The threaded insert 7 has an internal thread 7d into which a hinge screw 6 can be screwed. The hinge screw 6 serves for the controlled attachment of the articulated arm, not shown, of the door closing device. The hinge screw 6 only fills the lower portion of the through hole of the threaded insert 7 out. The not of the hinge screw 6 filled area of the threaded insert 7 serves as a recess A, in which the spacer 5 between the adjusting screw 6 and the brake pad 4 is arranged. The spacer 5 , which assumes the solid state below the melting temperature T, is supported with its one lower side on the contact surface 6e the hinge screw 6 from. The spacer 5 becomes sideways from the walls 6a includes the hinge screw and thus held laterally in position. The brake pad 4 lies with his the braking surface 4a opposite side 4b on the spacer 5 and is by this relative to the hinge screw 6 kept at a distance.

The 2a . 2 B . 3a and 3b show the operating principle of the locking device according to the invention. To lock the door this is opened, with the sliding shoe 1 is moved from left to right by means of the articulated arm, not shown, and by the slide rail 2 is guided. In the slide rail 2 is a spring 3 arranged, which is compressed by the sliding shoe coming from the left. As soon as the brake pad 4 the most baggy area 3a the feather 3 has happened, the shoe can 1 only be moved by a strong force from right to left. The force of the door closer is not enough for this purpose alone, so that the shoe 1 and thus the door lingers in the locked position. As soon as the ambient temperature T is greater than or equal to the melting temperature T _S , the material of the spacer becomes 5 soft or melts, so that due to the spring force of the brake pad 4 the spacer 5 squeezing and sliding shoe 1 dives. The material of the spacer 5 deviates to the side or in unrepresented open spaces or channels and makes room for the brake pad. By this evasive movement of the brake pad 4 can the shoe 1 due to the door closing force being moved to the left in the direction of the arrow, whereby the door is closed by itself by means of the door closing force ( 2 B ).

The 3a and 3b show cross-sectional views of the slide rail 2 with sliding shoe therein, once at an ambient temperature less than T _s ( 3a ) and once again at an ambient temperature greater than or equal to the melting temperature T _S ( 3b ). As long as the ambient temperature T is less than the melting temperature T _S , holds the spacer 5 the brake pad 4 in position, after which a sufficiently large holding force for fixing or locking the shoe is applied by means of the locking device. Once, as in 3b shown, the ambient temperature is greater than or equal to the melting temperature T _S , loses the spacer 5 its shape and the brake pad 4 moves from the leaf spring 3 away into the recess A inside.

The 4a and 4b show different views of the main body of the shoe 1 which can be made in particular of plastic. The sliding shoe body 1 has lateral guide collar 1b on which, as in 3a and 3b shown, the leaf spring 3 embrace laterally. Furthermore, the main body 1 a round in cross-section window-like opening 1d on which of the threaded insert 7 , which in detail in the 5a and 5b is shown, is penetrated. In addition, the base body has a recess 1e which forms a hexagon socket in which the hexagon head 7a of the thread insert 7 positively comes to the insert, so that the threaded insert 7 when screwing in the hinge screw 6 secured against unintentional twisting.

The 5a shows a plan view of the hexagon head 7a of the thread insert 7 with a central bore A, which is the recess for the brake pad 4 , the spacer 5 as well as the hinge screw 6 forms. For making the screw connection between the hinge screw 6 and the threaded insert 7 the recess A has an internal thread 7d on. The threaded insert is advantageously made of a metallic material.

It is of course possible that the spacer 5 differently shaped or designed. In addition, it is possible that the recess A, the spacer 5 positively engages around the side, in which case channels in the threaded insert 7 must be provided by the melting material of the spacer 5 can escape, so that the brake pad 4 can dive into the recess A of the threaded insert, so that the locking device is released.

It is of course also possible that the spacer member or the thermal element is a curved spring, which releases the path of movement of the brake pad from a certain temperature by their thermal expansion with increasing temperature. In this case, the path of movement of the brake pad does not have to coincide with the movement path shown by way of example in the figures into the recess A.

Similarly, the thermal element could not be arranged in the shoe but in the slide, which then z. B. the spring would clear the way for the shoe, as soon as a critical ambient temperature is exceeded.

Claims (14)

Locking device for a door provided with a door closer, with an arranged between the door and the door frame sliding arm, which is mounted at one end to the door closer and at its other end to a shoe ( 1 ) is rotatably articulated, wherein the sliding shoe ( 1 ) in an arranged on the door frame or on the door guide rail ( 2 ) is displaceably guided and in a predeterminable locking position within the slide rail ( 1 ) is frictionally and / or positively lockable, characterized in that in the shoe ( 1 ) a spacer ( 5 ) is arranged, which at a certain ambient temperature (T _S ), in particular 47 ° C, is thermally deformable or melts, and hereby releases the frictional connection and / or the positive connection. Locking device according to claim 1, characterized in that in the region of the locking position at which the sliding shoe ( 1 ) non-positively in the slide rail ( 2 ), a resilient part ( 3 ) is arranged, which the sliding shoe ( 1 ) in the area frictionally against the slide rail ( 2 ) pressurized. Locking device according to claim 1 or 2, characterized in that in a recess (A) in the sliding block ( 1 ) a brake pad or a locking part ( 4 ) is arranged, wherein the brake pad or the latching part ( 4 ) with its first page ( 4a ) with the elastic part ( 3 ) and with its second page ( 4b ) on the spacer ( 5 ) and is supported in particular on this, wherein the brake pad or the latching part ( 4 ) during thermal deformation or melting of the spacer ( 5 ) at least partially into the recess (A) can move. Locking device according to one of the preceding claims, characterized in that the recess (A) the brake pad or the locking part ( 4 ) encloses laterally and / or leads. Locking device according to claim 3 or 4, characterized in that in the recess (A), the spacer member (A) 5 ) between the bottom of the recess (A) and the brake pad or the latching part ( 4 ) is arranged. Locking device according to claim 5, characterized in that the spacer member ( 5 ) of its cross-sectional dimensions is smaller than the recess (A), such that the deforming or melting material of the spacer ( 5 ) can escape to the side and the brake pad or the locking part ( 4 ) clear the way into the recess (A). Locking device according to claim 5, characterized in that the spacer member rests positively in the recess, wherein the sliding shoe has channels which terminate in the recess into which the melting material of the spacer member can flow. Locking device according to one of the preceding claims, characterized in that the spacer is made of a fusible link whose melting temperature determines the temperature at which the force or positive engagement to be solved. Locking device according to one of the preceding claims 3 to 8, characterized in that the brake pad or the locking part and the spacer member are in particular positively connected with each other. Locking device according to one of the preceding claims, characterized in that the made of plastic shoe has a threaded insert made of metal, in which a hinge screw is screwed and on which the articulated arm is rotatably mounted, wherein the hinge screw forms the bottom of the recess and the spacer between the hinge screw and brake pad is arranged. Locking device according to one of the preceding claims, characterized in that by means of an adjustment mechanism, for. B. in the form of an adjusting screw or the joint screw, the height is adjustable with which protrudes the brake pad from the shoe. Locking device according to one of the preceding claims 3 to 11, characterized in that the brake pad is pivotally mounted, wherein the spacer member forms an abutment which prevents the rotational movement in the sliding shoe until the material-dependent temperature is exceeded, whereupon the spacer member, the pivoting movement of the brake pad releases. Locking device according to one of the preceding claims 3 to 6, characterized in that the spacer member by its thermal change in length clears the path for the brake pad in the recess or in the shoe. Sliding shoe for a locking device for a provided with a door closer door which has a disposed between the door and door frame sliding arm which is mounted at one end to the door closer and hinged at its other end to a sliding block, wherein the sliding block in a door frame or on . arranged on the door guide rail is slidably guided and in a predetermined locking position within the slide non-positively and / or positively lockable, characterized in that a spacer is arranged in the shoe, which at a certain ambient temperature, in particular 47 ° C, thermally deformable is or melts, and hereby releases the frictional connection and / or the positive connection.

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