Backplate for a door actuator

Abstract

A backplate for a door actuator, includes at least two mounting elements, one of the two mounting elements being formed for fastening to a mounting surface, in particular door, casing or wall, and the other mounting element for accommodating the door actuator. The backplate further includes at least one connecting assembly with a bar element mobile disposed at the first mounting element and a thermally activatable trigger element. The bar element is movable from a retaining position to a release position. In the retaining position, the bar element retains the second mounting element and, in the release position, releases the second mounting element. When thermally activated, the trigger element releases a movement of the bar element to the release position and/or, the trigger element moves the bar element to the release position.

Claims

1. A backplate for a door actuator, comprising a first mounting element and a second mounting element, wherein one of the two mounting elements is formed for fastening to a mounting surface, and the other mounting element for accommodating the door actuator, at least one connecting assembly with a bar element disposed mobile at the first mounting element and a thermally activatable trigger element, wherein the bar element is movable from a retaining position to a release position, wherein, in the retaining position, the bar element retains the second mounting element, and in the release position, releases the second mounting element, and wherein, upon thermal activation, the trigger element releases a movement of the bar element to the release position and/or, upon thermal activation, the trigger element moves the bar element to the release position.

2. The backplate according to claim 1, wherein the trigger element is disposed, between the bar element and the first mounting element to block a movement of the bar element to the release position.

3. The backplate according to claim 1, wherein, under thermal load, the trigger element is destructible, deformable, and/or meltable.

4. The backplate according to claim 1, wherein the bar element is accommodated in a recess of the first mounting element.

5. The backplate according to claim 1, wherein, in the retaining position thereof, the bar element and the second mounting element positively engage in each other.

6. The backplate according to claim 1, wherein the connecting assembly comprises a drive element, with thermally intumescent material and/or a spring for moving the bar element to the release position.

7. The backplate according to claim 1, wherein the drive element is disposed in a recess of the first mounting element and/or in a recess of the second mounting element.

8. The backplate according to claim 1, wherein a detaching element is provided, wherein, the detaching element comprises a thermally intumescent material and/or a spring, wherein the detaching element is disposed for pushing the first and the second mounting elements away from each other.

9. The backplate according to claim 8, wherein the detaching element is disposed in a recess of the first mounting element and/or in a recess of the second mounting element.

10. The backplate according to claim 1, wherein the first mounting element is formed as a plate.

11. The backplate according to claim 1, wherein the second mounting element is formed as a plate.

12. The backplate according to claim 1, wherein a plurality of second mounting elements are provided, which are formed for accommodating the door actuator and/or for fastening to the mounting surface.

13. The backplate according to claim 12, wherein the plurality of second mounting elements, formed as bushings with female thread, are fitted in the first mounting element.

14. The backplate according to claim 1, wherein the backplate has a thickness of maximum 60 mm.

15. An assembly comprising a backplate according to claim 1 and a door actuator, which is fastened to the backplate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The disclosure is now described in more detail based on exemplary embodiments. In this case, it shows:

(2) FIG. 1 an inventive assembly with inventive backplate according to a first exemplary embodiment,

(3) FIG. 2 a rear surface of the inventive backplate according to the first exemplary embodiment,

(4) FIG. 3 an inner surface of the second mounting element of the inventive backplate according to the first exemplary embodiment,

(5) FIG. 4 an inner surface of the first mounting element of the inventive backplate according to the first exemplary embodiment,

(6) FIG. 5 the section A-A identified in FIG. 2,

(7) FIG. 6 the section B-B identified in FIG. 2,

(8) FIG. 7 a diagrammatic view of the inventive backplate according to a first exemplary embodiment when the door actuator detaches,

(9) FIG. 8 a rear surface of an inventive backplate according to a second exemplary embodiment,

(10) FIG. 9 the section C-C identified in FIG. 8,

(11) FIG. 10 another sectional view of the inventive backplate according to the second exemplary embodiment,

(12) FIG. 11 the section D-D identified in FIG. 8,

(13) FIG. 12 a first variant to the second exemplary embodiment,

(14) FIG. 13 a second variant to the second exemplary embodiment.

DETAILED DESCRIPTION OF THE DRAWINGS

(15) In the following, an assembly 100 and a backplate 1 are described in detail based on the Figures. FIGS. 1 to 7 show the configuration according to a first exemplary embodiment. FIGS. 8 to 13 show a second exemplary embodiment of the backplate 1.

(16) For describing the first exemplary embodiment, reference is made to the FIGS. 1 to 7. FIG. 1 shows purely diagrammatically a mounting surface 101 of the assembly 100. A door, casing or wall forms said mounting surface 101, for example. A mounting axis 2 is defined vertically to the mounting surface 101. The backplate 1 is fastened to the mounting surface 101. The door actuator 102 is mounted in turn on the backplate 1. The door actuator 102, herein formed as a door closer, includes an output axis 103. The output axis 103 is vertical to the mounting axis 2. The mounting axis 2 is vertical to the mounting surface 101.

(17) The backplate 1 comprises a first mounting element 3 and a second mounting element 4. With the rear surface 6 thereof, the first mounting element 3 rests at the mounting surface 101. The two inner surfaces 7 of the two mounting elements 3, 4 rest against each other. The front surface 8 of the second mounting element 4 serves for accommodating the door actuator 102.

(18) FIG. 2 shows the rear surface 6 of the backplate 1. FIG. 3 shows the inner surface 7 of the second mounting element 4. FIG. 4 shows the inner surface 7 of the first mounting element 3. FIG. 5 shows the section A-A identified in FIG. 2, and FIG. 6 shows the section B-B identified in FIG. 2. FIG. 7 shows a diagrammatic view of the backplate 1 when the door actuator 102 detaches.

(19) The two mounting elements 3, 4 are respectively plate-shaped formed and are vertical to the mounting axis 2. The two mounting elements 3, 4 are connected to each other via three connecting assemblies 5.

(20) The second mounting element 4 includes a plate body 9, for example according to the illustration in FIG. 3. Several form closure elements 10 extend from said plate body 9 in the direction of the first mounting element 3.

(21) Furthermore, the plate body 9 includes first recesses 11. Said first recesses 11 are passage recesses.

(22) Furthermore, the plate body 9 includes several second recesses 12, formed as pockets. At the inner surface 7, the second recesses 12 are open.

(23) The plate body 9 of the second mounting element 4 and the first mounting element 3 comprise several mounting openings 13. Said mounting openings 13 are passage recesses, in particular through-holes, which extend aligned through both mounting elements 3, 4. In particular, when installing the backplate, the two mounting elements 3, 4 are already connected to each other. The screws for fastening to the mounting surface 101 are placed from the front side 8 through both mounting elements 3, 4. The mounting openings 13 in the second mounting element 4 are correspondingly large and are used as tool openings, so as to be able to fasten just the first mounting element 3 to the mounting surface 101 with the screws.

(24) The individual connecting assembly 5 comprises respectively one bar element 14. In the exemplary embodiment shown, the single bar element 14 is formed U-shaped. The bar element 14 is located in a third recess 13 in the plate-shaped first mounting element 3. In said third recess 18, the bar element 14 is linearly mobile vertically to the mounting surface 2.

(25) For example, FIG. 2 shows the bar elements 14 in the retaining position thereof. In this case, the bar elements 14 positively engage in the form closure elements 10 of the second mounting element 4.

(26) One trigger element 15 is provided in each connecting assembly 5. Herein, said trigger element 15 is formed as a glass vial. The trigger element 15 retains the associated bar element 14 in the upper retaining position. Furthermore, per connecting assembly 5, one drive element 16 is located in the third recess 18. The respective drive element 16 is disposed between bar element 14 and first mounting element 3. Herein, the drive element 16 is formed from thermally intumescent material.

(27) As for example the sectional view in FIG. 6 shows, in the first mounting element 3, the third recess 18 continues in the first recess 11 in the second mounting element 4. Thereby, the bar element 14 and the drive element 16 can extend into both recesses 18, 11.

(28) Likewise, the sectional view in FIG. 6 shows that the trigger element 15 is tensioned with a set screw 19 against a compensating spring 20. Thereby, the trigger element 15 is clamped between bar element 15 and first mounting element 3.

(29) A detaching element 17 (see FIG. 4), herein likewise formed as thermally intumescent material, is located in the second recess 12 of the second mounting element 4.

(30) The trigger element 15 is destroyed at corresponding thermal load. Furthermore, the drive element 16 expands under the thermal effect and thereby presses the bar element 14 downwards. The form closure ceases between the two mounting elements 3, 4. As diagrammatically clarified in FIG. 7, in the next step, the detaching element 17 expands and thereby pushes the two mounting elements 3, 4 apart in the direction parallel to the mounting axis 2. Thereby, the door actuator 102 detaches from the mounting surface 101.

(31) FIG. 8 shows the rear surface 6 of the backplate 1 for the second exemplary embodiment. FIG. 9 shows the section C-C identified in FIG. 8. FIG. 10 is a further sectional view to a section parallel to the drawing plane of FIG. 8. FIG. 11 shows the section D-D identified in FIG. 8. FIGS. 12 and 13 show variants of the second exemplary embodiment.

(32) In the second exemplary embodiment, the bar elements 14 are not moved from top to bottom, but in horizontal direction. For this purpose, FIG. 8 shows the rear surface 6 of the backplate 1. The retaining elements 14 are located in the retaining position. The second mounting element 4 is not formed as a plate. Rather herein, several second mounting elements 4 are used, in this example six. The individual second mounting elements 4 are formed as bushings with female thread 30. Said bushings are fitted in the plate-shaped first mounting element 3. In the illustration according to FIG. 8, the upper right second mounting element 4 is masked.

(33) The second mounting elements 4, formed as bushings, have a groove, preferably with non-round cross-section. Said area serves as the form closure element 10. Corresponding fork-shaped areas of the bar elements 14 engage in said form closure elements 10. Thereby, the second mounting elements 4 are secured against rotation and against falling out.

(34) The door actuator 102 is directly connected, in particular screwed to the bushing-shaped second mounting elements 4, or via a further plate-shaped element. When the second mounting elements 4 detach from the first mounting element 3, the door actuator 102 also falls off.

(35) As for example FIG. 10 clarifies, in the second exemplary embodiment as well, the trigger element 15 props up between bar element 14 and first mounting element 3. For this purpose, again a set screw 19 is provided, which allows for tensioning the trigger element 15 against a compensating spring 20.

(36) Again the drive element 16 is made from thermally intumescent material and, at corresponding thermal load and expansion resulting therefrom, pushes the bar element 14 to the release position thereof.

(37) FIG. 11 shows the arrangement of the detaching element 17 in a corresponding recess in the first mounting element 3. This detaching element 17 directly pushes the door actuator 102 away from the first mounting element 3.

(38) The sectional views in both exemplary embodiments show the definition of the thickness 22 of the backplate 1 parallel to the mounting axis 2. Potential positioning extensions 21, on which the door actuator 102 is fitted, are not considered for the thickness 22.

(39) FIG. 12 shows a variant for embodying the connecting assembly 5 in the second exemplary embodiment. Instead of a rigid bar element 14, herein is used a bar element 14 with two levers 31, which are rotatably supported to each other. Purely, diagrammatically, FIG. 12 shows that upon the trigger element 15 triggering, the point of rotation between said two levers 31 can be displaced via a corresponding drive element 16, whereby the bar element 14 moves to the release position thereof—the fork-shaped sections of the two levers 31 detach from the second mounting element 4.

(40) FIG. 13 shows a further purely diagrammatically illustrated variant to the second exemplary embodiment. Herein, the bar element 14 is again formed by two levers 31 rotatable with regard to each other. The axis of rotation of both levers 31 is stationary. On one side of the axis of rotation, the two levers 31 are connected via the trigger element 15. When the trigger element 15 does not keep both ends of the two levers 13 spaced apart any more, on the opposite side of the axis of rotation, the drive element 16, herein formed as a spring, can pull the two ends with the fork-shaped configurations to each other, so that the bar element 14 moves to the release position thereof.