Fire protection fastening device for fastening a door actuator

Abstract

A fire protection fastening device for fastening a door actuator, includes a frame with a back side, which is to be oriented to a mounting surface, in particular to a door, casing or wall, wherein a mounting axis is defined vertically to the back side. The frame is formed for arrangement between a door actuator and the mounting surface or is an integral component of the door actuator (102), at least one reaction chamber formed in the frame, wherein the frame delimits the reaction chamber on the entire circumference. The reaction chamber is open on the back side and/or on a front side of the frame opposite the back side. The device further includes a drive element made from thermally intumescent material disposed in the reaction chamber and, when activated, is formed for pushing away the door actuator from the mounting surface.

Claims

1. A fire protection fastening device for fastening a door actuator, the device comprising: a frame with a back side, configured to be facing a mounting surface, wherein a mounting axis is defined perpendicularly to the back side, and wherein the frame is formed for arrangement between a door actuator and the mounting surface or is an integral component of the door actuator, a reaction chamber formed in the frame, wherein the frame delimits the reaction chamber on the entire circumference, and wherein the reaction chamber is open on at least one of the back side and a front side of the frame opposite the back side, a drive element made from intumescent material disposed in the reaction chamber, which, when thermally activated, is formed for pushing away the door actuator from the mounting surface, and a piston plate disposed in the reaction chamber, which, when thermally activating the drive element, is displaceable by the drive element, in relation to at least one of the frame and the door actuator.

2. The fire protection fastening device according to claim 1, wherein the piston plate is manufactured from non-metallic, thermally insulating material or wherein the piston plate includes at least one layer of non-metallic, thermally insulating material.

3. The fire protection fastening device according to claim 1, wherein, on at least one side of the piston plate, an insulating plate is placed, which is manufactured from non-metallic, thermally insulating material.

4. The fire protection fastening device according to claim 3, wherein at least one of the drive element, and the piston plate, and the insulating plate extends over an entire cross-sectional area of the reaction chamber defined perpendicularly to the mounting axis.

5. The fire protection fastening device according to claim 1, wherein the reaction chamber is open on both the front and back sides over an entire cross-section thereof.

6. The fire protection fastening device according to claim 1, wherein the drive element is exposed on the back side of the frame for direct contact with the mounting surface.

7. The fire protection fastening device according to claim 1, wherein a depth, defined parallel to the mounting surface, of the reaction chamber amounts to between 1 mm and 30 mm, or wherein a cross-sectional area, defined parallel to the mounting surface, of the reaction chamber is between 400 mm.sup.2 and 50,000 mm.sup.2.

8. The fire protection fastening device according to claim 1, wherein the reaction chamber comprises a plurality of reaction chambers, and wherein a sum of cross-sectional areas, defined perpendicularly to the mounting axis, of the plurality of reaction chambers is at least 2,500 mm.sup.2.

9. The fire protection fastening device according to claim 1, wherein the frame includes first fastening points formed as holes configured for screwing to the mounting surface, and wherein the frame includes second fastening points formed as holes configured for screwing the door actuator or a mounting plate to the frame.

10. The fire protection fastening device according to claim 9, wherein two respective first and second fastening points next to each other form a pair and the distance between first fastening point and second fastening point of a pair is at most 5 times a thickness of the frame.

11. An assembly, comprising a door actuator and a fire protection fastening device according to claim 1, wherein the frame is an integral component of the door actuator.

12. An assembly, comprising a door actuator and a fire protection fastening device according to claim 1, wherein the door actuator is configured to be fastened directly to the frame.

13. An assembly, comprising a door actuator, a mounting plate and a fire protection fastening device according to claim 1, wherein the mounting plate is configured to be fastened directly to the frame, and wherein the door actuator is configured to be fastened directly to the mounting plate.

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 fire protection fastening device according to a first exemplary embodiment,

(3) FIG. 2 an exploded illustration for FIG. 1,

(4) FIG. 3 a frame of the inventive fire protection fastening device according to the first exemplary embodiment,

(5) FIG. 4 the section A-A identified in the FIGS. 1 and 3,

(6) FIG. 5 an exploded illustration of an inventive assembly with inventive fire protection fastening device according to a second exemplary embodiment,

(7) FIG. 6 an exploded illustration of an inventive assembly with inventive fire protection fastening device according to a third exemplary embodiment, and

(8) FIG. 7 a detail to FIG. 6.

DETAILED DESCRIPTION OF THE DRAWINGS

(9) In the following, are explained several exemplary embodiments of the disclosure. The same reference numerals identify the same, respectively functionally same structural components in all exemplary embodiments.

(10) All exemplary embodiments show an assembly 100 with a door actuator 102. In the exemplary embodiments, the door actuator 102 is formed as a hydraulic door actuator. The door actuator 102 includes an output axis 103. Via said output axis 103, the door actuator can be connected to a door or a casing by means of an arm assembly, for example.

(11) The door actuator 102 is to be fastened to a mounting surface 101. In particular, a door, casing or wall forms said mounting surface 101. A mounting axis 2 is perpendicular to the mounting surface 101.

(12) A fire protection fastening device 1 is used for fastening the door actuator 102 to the mounting surface 101. The fire protection fastening device 1 comprises a frame 3. In the first two exemplary embodiments according to the FIGS. 1 to 5, said frame 3 is a separate structural part. In the third exemplary embodiment according to the FIGS. 6 and 7, the frame 3 is an integral component of the door actuator 102.

(13) The frame 3 includes at least one reaction chamber 4. The reaction chamber 4 accommodates a drive element 7 and a piston plate 8. Furthermore, partially are used insulating plates 9.

(14) The side of the frame 3, facing the mounting surface 101, is referred to as the back side 5. The opposite side is referred to as the front side 6.

(15) The FIGS. 1 to 4 show the fire protection fastening device 1 of the assembly 100 according to the first exemplary embodiment. In this case, the frame 3 with the back side 5 thereof is fastened to the mounting surface 101. The door actuator 102 is directly mounted on the front side 6 of the frame 3.

(16) As revealed in FIGS. 2 and 3, the frame 3 has four reaction chambers 4. A sandwich of drive element 7, piston plate 8 and insulting plate 9 is located in each reaction chamber 4. In this case, as shown in the section of FIG. 4, the insulating plate 9 can be disposed outside the reaction chamber 4.

(17) Herein, the drive element 7 is formed from two layers of thermal intumescent material. The piston plate 8, for example made from aluminium, is disposed between the insulating plate 9 and the drive element 7.

(18) As in particular the section of FIG. 4 shows, the individual reaction chamber 4 is open on both sides. The drive element 7 is directly resting at the mounting surface 101. When thermally activating the drive element 7, the piston plate 8 is pressed in the direction of the door actuator 102. As the drive element 7 and the piston plate 8 are located in the reaction chamber 4, the expanding material of the drive element 7 does not get into the fissured back side of the door actuator 102, but the pressure is directly applied to the door actuator 102 via the piston plate 8.

(19) FIG. 3 shows a length 15 and a width 16 of the individual reaction chamber 4. Length 15 and width 16 are measured perpendicularly to the mounting axis 2 and determine the cross-sectional area of the reaction chamber 4. FIG. 4 reveals a depth 17 of the reaction chamber 4, measured parallel to the mounting axis 2. In this exemplary embodiment, the depth 17 of the reaction chamber 4 also corresponds to the thickness 18 of the frame 2 at the thickest spot.

(20) As FIG. 4 shows, the individual reaction chamber 4 has a border 10 on the entire circumference. Said border 10 extends parallel to the mounting axis 2 with an overhang 19. The overhang 19 is measured starting at a contact surface 20 between door actuator 102 and frame 3. The overhang 19 increases the depth 17 of the reaction chamber 4.

(21) FIGS. 2, 3 and 4 show, that the frame 3 can include at least one pocket 11 on the front side 6. Said pocket 11 forms an air-filled space, which improves the thermal insulation of the frame 3, so that an as small as possible a heat input is realized directly onto the door actuator 102 via the mounting surface 101 and through the frame 3. Such a pocket 11 can be disposed as well on the back side 5 of the frame 3. The pocket 11 can be filled as well, at least partially, with thermally insulating material, in particular firm material.

(22) FIG. 3 shows that the frame 3 includes four first fastening points 12 and four second fastening points 13. The first fastening points 12 are used for screwing the frame to the mounting surface 101. The second fastening points 13 are used for screwing the door actuator 102 to the frame 3. In the second exemplary embodiment, it is not the door actuator 102, which is screwed to the second fastening points 13, but a mounting plate 30.

(23) FIG. 3 reveals for the first and second exemplary embodiments, that one respective first fastening point 12 and one second fastening points 13, each formed as holes, forms a pair. In this case, the distance 14 between two associated fastening points 12, 13 is selected as small as possible.

(24) FIG. 5 shows an exploded illustration of the fire protection fastening device 1 at the assembly 100 according to the second exemplary embodiment. Herein, the mounting plate 30 is disposed between door actuator 102 and frame 3. The mounting plate 30 is screwed to the frame 3 via the second fastening points 13.

(25) In the second exemplary embodiment, the frame 3 has five reaction chambers 4. One drive element 7, herein for example also made from two layers, is seated in each reaction chamber 4. A plate is disposed on the front side of the respective drive element 7; said plate can be formed as a piston plate 8 or as an insulating plate 9. Furthermore, at this position, also two sandwiched plates can be used, namely a piston plate 8 and at least one insulating plate 9.

(26) Also in the second exemplary embodiment, the reaction chambers 4 are open on the front side 6 and on the back side 5. On the back side 5, the drive element 7 directly rests at the mounting surface 101.

(27) FIGS. 6 and 7 show the configuration of the fire protection fastening device 1 in the assembly 100 according to the third exemplary embodiment. In the third exemplary embodiment, the frame 3 of the fire protection fastening device 1 is an integral component of the door actuator 102. This is in particular seen, when looking at the back side of the door actuator 102 and FIG. 7. Herein, a reaction chamber 4 is formed in the frame 3. According to the exploded illustration in FIG. 6, the drive element 7 and a piston plate 8 are seated in this reaction chamber 4.