Fireproof fixing device for fixing door actuator

Abstract

To allow, in the event of a fire, a door actuator to be fixed with operational reliability remained unchanged and concurrently safety requirements to secure.SOLUTION: The present invention relates to a fireproof fixture for fixing a door actuator, including: a frame which is oriented toward a mounting surface, in particular a door, casing or wall, has a rear surface, has a mounting axis defined perpendicular to the rear surface, and is formed to be positioned between the door actuator and the mounting surface, and otherwise is an integral component of the door actuator; at least one reaction chamber which is formed in the frame, is sectioned on the whole circumference by the frame, and opens at the rear surface and / or a front surface of the frame on the opposite side of the rear surface; and a drive element made of a thermally expandable material, which is disposed within the reaction chamber, and is formed to push the door actuator away from the mounting surface when activated.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a fireproof fixing device for fixing a door actuator. The present invention also shows an assembly comprising a door actuator together with the fireproof fixing device.

Background Art

[0002] Door actuators are used for opening and closing doors. In particular, door closers and door drives are designated as door actuators. Generally, in a door closer, a manual The movement of spring accumulator To charge . In this case, energy is used to close the door. For to Stored . For example, in a door drive, the door can be automatically opened And / or closed Jiru by an electric mechanism or hydraulics.

[0003] Normally, a door actuator is fixed to an attachment surface, i.e., a door or a casing, or a wall. In particular, in a fire-rated door, it should be noted that a flammable fluid, such as hydraulic oil, is often used in the door actuator. In case of a fire, by taking appropriate measures as much as possible, it is possible to prevent the fluid of the door actuator from overheating and catching fire.

[0004] The object of the present invention is to show a fireproof fixing device for a door actuator which, in particular in case of a fire, has operational reliability and at the same time enables meeting the requirements regarding safety while fixing the door actuator.

[0005] This object is achieved by the features of the independent claims. Further advantageous configurations of the present invention are the subject matter of the dependent claims.

Summary of the Invention

[0006] The present invention describes a fire protection fixture for fixing a door actuator. As mentioned in the introduction, a door closer or a door drive is a door actuator. The door actuator is to be fixed to a mounting surface. In particular, a door, a casing or a wall forms the above-mentioned mounting surface.

[0007] The fire protection fixture comprises a frame. According to an embodiment of the present invention, the frame is formed to be disposed between the door actuator and the mounting surface. When omitting a separate mounting plate, in this case, the door actuator is directly placed on the front surface of the frame. The rear surface of the frame faces the mounting surface and is, in particular, directly placed on the mounting surface. As will be described in more detail, the mounting plate can be used between the frame of the fire protection fixture and the door actuator. In particular, in this case, the mounting plate is screwed to the frame of the fire protection fixture, and the door actuator is fixed to the mounting plate.

[0008] In another configuration, the frame of the fire protection fixture is provided as an integral component of the door actuator. This configuration will also be described in more detail.

[0009] In describing the present invention, a mounting axis is defined. The mounting axis is perpendicular to the frame, in particular perpendicular to the rear surface of the frame. Further, the mounting axis is perpendicular to the mounting surface. The mounting axis is parallel to a screw, for example, a screw used to screw the frame to the mounting surface. According to another definition, the mounting axis is perpendicular to the output axis of the door actuator. Through the above-mentioned output axis, the door actuator is connected to a door or a wall, for example, via an arm assembly.

[0010] At least one reaction chamber is formed in the frame of the fire protection fixture. In a preferred configuration, the frame includes several reaction chambers. In particular, two, three, four, five, six, seven or eight reaction chambers are provided in the frame. For the sake of simplicity, the present invention is mainly described based on one reaction chamber, but it is always intended that multiple reaction chambers are formed in the same way. However, the reaction chambers can have different sizes so that, for each geometric configuration of the fire protection fixture, the maximum possible number of reaction chambers with the maximum possible surface can be used.

[0011] The frame delimits each reaction chamber all around. In terms of its depth, the reaction chamber extends parallel to the mounting axis. Accordingly, the perimeter of the reaction chamber is also defined with respect to an axis parallel to the mounting axis. The reaction chamber opens at the rear and / or front face of the frame. The reaction chamber opens on both faces, i.e., the front and the rear face, and it is argued that it is a passage gap in the frame. If the reaction chamber opens only on one of the two faces, in particular it is argued that it is a pocket formed in the frame.

[0012] Drive elements are arranged in each reaction chamber. The drive elements are made of a thermally expandable material. When thermally activated, i.e., when heated accordingly, the drive elements are formed to push the door actuator away from the mounting surface. In particular, the thermally activating material of the drive elements is provided to activate in the temperature range from 90 degrees Celsius to 200 degrees Celsius.

[0013] The drive elements are made, in particular, of an optionally cuttable two-dimensional plate-shaped material. This material is available in a specific thickness, and preferably, several layers are provided superposed to form the drive elements. And the multiple layers are combined to form the drive elements.

[0014] When the thermally expandable material is activated, the volume of the above material increases, for example, by foaming. Since the drive element is arranged in the reaction chamber and the frame delimits the reaction chamber all around, the drive element expands only in a direction parallel to the mounting axis. Due to the surrounding being delimited, the frame blocks the drive element from expanding in a direction perpendicular thereto.

[0015] As already described, the frame can be arranged between the door actuator and the mounting surface as separate components. If necessary, a mounting plate can be positioned between the frame and the door actuator. In this arrangement of the frame, the reaction chamber can be open on both the front and rear sides. It is clear that when thermally activated, the drive element expands in a direction parallel to the mounting axis, whereby the door actuator is pushed away from the mounting surface. Whether the frame is also pushed away or remains on the surface of the mounting surface is not relevant to the basic function of the present invention.

[0016] In this configuration where the frame is an integral component of the door actuator, in particular, the reaction chamber is provided with an opening on the rear side so as to push the door actuator away from the mounting surface together with the frame integral therewith.

[0017] When it is realized that the thermally activated drive element or drive elements in an individual reaction chamber push the door actuator away from the mounting surface, for example, the male thread or the corresponding female thread of a screw is damaged. Thereby, the door actuator is detached from the mounting surface, that is, the door, the casing or the wall. In particular, in this case, the door actuator is located on the surface of the door facing away from the fire. The door actuator detached from the mounting surface prevents the fluid in the door actuator from igniting by preventing the door actuator from overheating.

[0018] In a preferred embodiment, the fireproof fixture is provided including a piston plate disposed in the reaction chamber. In particular, the piston plate is so disposed in the reaction chamber that the mounting axis is orthogonal to the piston plate. When several reaction chambers are employed, one drive element and one piston plate used in a respective preferred form are located in each reaction chamber.

[0019] In particular, the piston plate is formed of a rigid material and is adapted to be displaced by the drive element when the drive element is thermally activated. In this case, in particular, the piston plate is provided to be guided into the reaction chamber. In particular, the displacement direction is a direction parallel to the mounting axis. Preferably, the gap between the piston plate and the reaction chamber is kept as small as possible so that the expandable material of the drive element is not extruded through the gap via the piston plate. When activated, i.e., when the drive element expands, both the drive element and the piston plate can exit the reaction chamber.

[0020] Basically, the piston plate can be disposed in front of or behind the drive element. It is also possible to dispose one respective piston plate on both sides of the drive element. And by doing so, two piston plates are provided for each reaction chamber.

[0021] In order to ensure that the pressure exerted by the drive element is reliably transmitted to the surface as large as possible, the piston plate may be referred to as a pressure distribution plate or a pressure regulating plate. Also, when thermally activated, they ensure that the drive element does not expand without being used, for example, in the cavity space of the torn rear surface of the door actuator.

[0022] The piston plate is preferably manufactured and provided from a metal, such as aluminum. This provides a piston plate that is strong, lightweight and easy to manufacture.

[0023] However, in many applications, the heat insulation configuration of the fire protection fixture should be considered advantageous. Basically, the heat input from the mounting surface into the drive element should be realized without any resistance, if possible. However, further heat conduction, especially in the direction of the door actuator, should be prevented. Therefore, if possible, the piston plate arranged between the drive element and the door actuator should be made of a non-metallic and heat-insulating material. Create Preferably, it is made of. As an option, the piston plate can have several layers, with at least one layer consisting of a non-metallic and heat-insulating material. Also, the piston plate arranged between the drive element and the mounting surface can be provided manufactured from a metal and heat-conductive material. Thereby, the heat input from the mounting surface into the drive element is achieved rapidly so that the volume increase of the expandable material is accelerated. Thus, the drive element can be provided to be surrounded by two different piston plates, especially two piston plates having different heat conductivities.

[0024] Especially when manufacturing a piston plate consisting only of a heat-insulating material, it is necessary to follow the use of a suitable stable material to embody a rigid piston plate. Suitable plastic materials are suitable for this purpose.

[0025] In addition to using a heat-insulating material for the piston plate, or as an option thereto, it is preferably provided that at least one shielding plate made of a non-metallic and heat-insulating material is installed on at least one surface of the piston plate. The shielding plate Composite Preferably consists of fibers.

[0026] When a shielding plate is installed between the piston plate and the drive element, especially, it is located in the reaction chamber. When the shielding plate is installed on the surface of the piston plate facing away from the drive element, it can be located outside the reaction chamber.

[0027] Individual reaction chambers have a cross-sectional area perpendicular to the mounting axis. In particular, the cross-sectional area of the reaction chamber is square. This geometric configuration enables the dispersion of as many reaction chambers as possible, or reaction chambers with a large surface area, across the frame. However, other cross-sectional areas are also possible. However, it is preferred that the drive element and / or the piston plate and / or the shut-off plate are provided extending across the entire cross-sectional area.

[0028] The reaction chambers preferably open on both sides, i.e., the front and the rear. In particular, the reaction chambers open on both respective sides across the entire cross-section. The open rear surface of the reaction chamber is advantageous in that the drive element can make direct contact with the mounting surface. This enables as rapid and sufficient heating of the drive element as possible in case of a fire. Through the open front surface, the drive element can expand in the direction of the door actuator and push the piston plate in the direction of the door actuator, respectively.

[0029] The fire protection fixtures are formed as flat as possible and are configured to be arranged unobtrusively between the door actuator and the mounting surface if possible. The depth of the individual reaction chambers is defined perpendicular to the mounting surface. The depth of the reaction chamber mentioned above is preferably between 1 mm and 30 mm, in particular between 5 mm and 20 mm. This provides sufficient structural space to arrange the drive element and, if necessary, the piston plate within the reaction chamber as well.

[0030] The cross-sectional area of the individual reaction chambers is defined perpendicular to the mounting axis. The area is preferably between 400 mm 2 and 50,000 mm 2 and more preferably between 900 mm 2 and 10,000 mm 2

[0031] ​When using several reaction chambers, the sum of all cross-sectional areas is also of concern. This is because the largest possible cross-sectional area enables the deployment of a correspondingly strong force to push the door actuator. Therefore, the sum of all cross-sectional areas of all reaction chambers should be at least 2,500 mm 2 , and preferably at least 5,000 mm 2 .

[0032] According to the configurations described so far, the frame is not an integral component of the door actuator but is arranged between the mounting surface and the door actuator or the mounting plate. In this case, in particular, the frame is provided with a first fixing point for screwing to the mounting surface. Also, a second fixing point is formed on the frame to which the door actuator or possibly the mounting plate can be fixed. In particular, the fixing points are through-holes. In particular, for the second fixing point, the through-hole preferably has an internal thread. As an option for the configuration as a hole, for example, a threaded rod can form the fixing point.

[0033] Regarding the dimensions of the fixing points described here, each is based on its center, that is, the center of the hole.

[0034] Each two first and second fixing points are preferably positioned adjacent to each other to form a pair. For example, two first fixing points and two second fixing points are provided on the right side of the frame. Correspondingly, for example, two first fixing points and two second fixing points are provided on the left side of the frame. Thus, two pairs are formed on both sides of the frame respectively.

[0035] With the intention of achieving the possibility of direct force input to the fixed points, when pressing the door actuator, it is preferable that the distance between one pair of fixed points is provided to be as short as possible. In particular, the distance between the first fixed point and the second fixed point of each pair is preferably at most 5 times, and at most 4 times the thickness of the frame. In this case, the thickness of the frame is defined parallel to the mounting axis. In this case, the frame is preferably determined by its thickest point. As an option, the average thickness of the frame is determined in the area between one pair of fixed points. If the distance between one pair of fixed points is too long, it is possible that the frame only deforms without the door actuator peeling off from the frame.

[0036] Furthermore, the present invention comprises a first assembly having a door actuator and the above-described fireproof fixing device, and the frame of the fireproof fixing device is formed as an integral component of the door actuator. In particular, the door actuator includes, for example, a housing made by die casting. In particular, at least one hydraulic chamber having a non-combustible fluid is located in the housing. The frame is preferably formed on the rear surface of the door actuator of the housing, in particular. In particular, in this case, it is intended that only one reaction chamber is provided corresponding to one drive element of the frame. In this case, the piston plate can be located on the rear surface of the frame.

[0037] Also, the present invention comprises a second assembly having a door actuator and the described fireproof fixing device, and the door actuator can be directly fixed to the frame, in particular, by screwing. Preferably, as a result, the frame of the fireproof fixing device can be directly fixed to the mounting surface, in particular, by screwing.

[0038] Furthermore, the present invention comprises a third assembly having a door actuator and the described fire protection fixture, and further an additional mounting plate. In this case, the mounting plate is arranged between the fire protection fixture and the door actuator. The mounting plate is fixed, in particular screwed, to the frame of the fire protection fixture. As a result, the frame of the fire protection fixture is screwed to the mounting surface. In this case, the door actuator can be connected, in particular screwed, to the front surface of the mounting plate in the usual way. When thermally activated, the mounting plate is pushed away from the mounting surface. In this case, the door actuator peels off together with the mounting plate.

[0039] The independent claims described with respect to this fire protection fixture having an advantageous configuration and inventive step find advantageous use for all three assemblies.

[0040] Here, the present invention will be described in more detail based on exemplary embodiments. In this case, the following are shown.

Brief Description of the Drawings

[0041]

Figure 1

Figure 2

[0042]

Figure 3

Figure 4

[0043]

Figure 5

[0044]

Figure 6

Figure 7

[0045] Some exemplary embodiments of the present invention will be described below. In all exemplary embodiments, the same reference numerals identify components that are identical or functionally identical in structure, respectively.

[0046] All exemplary embodiments show an assembly 100 having a door actuator 102. In an exemplary embodiment, the door actuator 102 is formed as a hydraulic door actuator. The door actuator 102 includes an output shaft 103. Through the output shaft 103 described above, the door actuator can be connected to a door or a casing, for example, by an arm assembly.

[0047] The door actuator 102 is fixed to a mounting surface 101. In particular, a door, a casing, or a wall forms the mounting surface 101 described above. The mounting shaft 2 is perpendicular to the mounting surface 101.

[0048] A fire protection fixture 1 is used to fix the door actuator 102 to the mounting surface 101. The fire protection fixture 1 includes a frame 3. In the first two exemplary embodiments according to FIGS. 1 to 5, the frame 3 is a separate structural part. In the third exemplary embodiment according to FIGS. 6 and 7, the frame 3 is an integral component of the door actuator 102.

[0049] The frame 3 includes at least one reaction chamber 4. The reaction chamber 4 houses a drive element 7 and a piston plate 8. Also, a partial blocking plate 9 is used.

[0050] The surface of the frame 3 facing the mounting surface 101 is referred to as the rear surface 5. The opposite surface is referred to as the front surface 6.

[0051] From FIG. 1 to FIG. 4, the fireproof fixing device 1 of the assembly 100 according to the first exemplary embodiment is shown. In this case, the frame 3 having the rear surface 5 is fixed to the mounting surface 101. The door actuator 102 is directly attached to the front surface 6 of the frame 3.

[0052] As shown in FIGS. 2 and 3, the frame 3 has four reaction chambers 4. The stack of the drive element 7, the piston plate 8 and the blocking plate 9 is located in each reaction chamber 4. In this case, as shown in the cross-section of FIG. 4, the blocking plate 9 can be arranged outside the reaction chamber 4.

[0053] Here, the drive element 7 is formed from two layers of a thermally expandable material. The piston plate 8 is made of, for example, aluminum and is arranged between the blocking plate 9 and the drive element 7.

[0054] In particular, as shown in the cross-section of FIG. 4, the individual reaction chambers 4 are open on both sides. The drive element 7 is placed directly on the mounting surface 101. When the drive element 7 is thermally activated, the piston plate 8 is pressed in the direction of the door actuator 102. The drive element 7 and the piston plate 8 are located in the reaction chamber 4, and the expanding material of the drive element 7 does not enter into the cracked rear surface of the door actuator 102, but the pressure is directly applied to the door actuator 102 via the piston plate 8.

[0055] FIG. 3 shows the length 15 and the width 16 of the individual reaction chambers 4. The length 15 and the width 16 are measured perpendicular to the mounting axis 2 and determine the cross-sectional area of the reaction chamber 4. FIG. 4 represents the 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 point.

[0056] As shown in FIG. 4, the individual reaction chamber 4 has a boundary 10 around its entire circumference. The above-mentioned boundary 10 extends parallel to the mounting shaft 2 having the protrusion 19. The protrusion 19 is measured starting from the contact surface 20 between the door actuator 102 and the frame 3. The protrusion 19 increases the depth 17 of the reaction chamber 4.

[0057] FIGS. 2, 3 and 4 show that the frame 3 can include at least one pocket 11 in the front surface 6. The above-mentioned pocket 11 forms an air-filled space that improves the heat insulation of the frame 3, so that as little heat input as possible is directly realized on the door actuator 102 through the frame 3 via the mounting surface 101. Such a pocket 11 can also be arranged on the rear surface 5 of the frame 3. The pocket 11 can also be filled at least partially with a heat-insulating material, especially a solid material.

[0058] FIG. 3 shows a frame 3 including four first fixing points 12 and four second fixing points 13. The first fixing points 12 are used to screw the frame 3 to the mounting surface 101. The second fixing points 13 are used to screw the door actuator 102 to the frame 3. In a second exemplary embodiment, it is not the door actuator 102 but the mounting plate 30 that is screwed to the second fixing points 13.

[0059] FIG. 3 represents the first and second exemplary embodiments. Each of the first fixing points 12 and one second fixing point 13, each formed as a hole, forms a pair. In this case, the distance 14 between two corresponding fixing points 12, 13 is selected to be as small as possible.

[0060] FIG. 5 shows a developed view of the fire protection fixture 1 in the assembly 100 according to the second exemplary embodiment. Here, the mounting plate 30 is arranged between the door actuator 102 and the frame 3. The mounting plate 30 is screwed to the frame 3 via the second fixing points 13.

[0061] In a second exemplary embodiment, the frame 3 has five reaction chambers 4. Here, for example, one drive element 7 consisting of two layers is seated in each reaction chamber 4. A plate is arranged on the front surface of each drive element 7, and the plate can be formed as the piston plate 8 or the shut-off plate 9. Also, two stacked plates, namely the piston plate 8 and at least one shut-off plate 9, can be used at this location.

[0062] Also in the second exemplary embodiment, the reaction chambers 4 are open at the front surface 6 and the rear surface 5. At the rear surface 5, the drive element 7 is placed directly on the mounting surface 101.

[0063] Figs. 6 and 7 show the configuration of the fire protection fixture 1 in the assembly 100 according to a third exemplary embodiment. According to the third exemplary embodiment, the frame 3 of the fire protection fixture 1 is an integral component of the door actuator 102. This can be seen, among other things, from the rear surface of the door actuator 102 and Fig. 7. Here, the reaction chamber 4 is formed in the frame 3. According to the exploded view of Fig. 6, the drive element 7 and the piston plate 8 are seated in this reaction chamber 4.

[0064] List of reference signs 1 Fire protection fixture 2 Mounting shaft 3 Frame 4 Reaction chamber 5 Rear surface 6 Front surface 7 Drive element 8 Piston plate 9 Shut-off plate 10 Boundary 11 Pocket 12 First fixing point 13 Second fixing point 14 Distance 15 Length 16 Width 17 Depth 18 Thickness 19 Protrusion 20 Contact surface 30 Mounting plate 100 Assembly 101 Mounting surface 102 Door actuator 103 Output shaft

Claims

1. A fireproof fixing device for fixing a door actuator, comprising: a frame having a rear surface oriented towards an attachment surface, an attachment axis being defined perpendicular to the rear surface, the frame being formed to be disposed between a door actuator and the attachment surface or being an integral component of the door actuator; and at least one reaction chamber formed in the frame, the frame delimiting the reaction chamber over its entire circumference, the reaction chamber opening at the rear surface of the frame and / or at a front surface opposite the rear surface; and a drive element disposed in the reaction chamber and formed of an expandable material, the drive element being formed to push the door actuator away from the attachment surface when thermally activated; The fireproof fixing device comprising the above components.

2. The fireproof fixing device according to claim 1, further comprising a piston plate disposed in the reaction chamber, the piston plate being displaceable relative to the frame and / or the door actuator by the drive element when the drive element is thermally activated.

3. The fireproof fixing device according to claim 2, wherein the piston plate is made of a non-metallic heat-insulating material or comprises at least one layer of a non-metallic heat-insulating material.

4. The fireproof fixing device according to claim 2 or 3, wherein at least one heat-insulating plate made of a non-metallic heat-insulating material is provided on at least one surface of the piston plate.

5. The fireproof fixing device according to claim 4, wherein the drive element and / or the piston plate and / or the heat-insulating plate extend over the entire cross-sectional area of the reaction chamber defined perpendicular to the attachment axis.

6. The fireproof fixing device according to any one of claims 1 to 5, wherein the reaction chamber is open on both sides.

7. The fireproof fixing device according to any one of claims 1 to 6, wherein the drive element is exposed on the rear surface of the frame so as to be in direct contact with the attachment surface.

8. The depth of the reaction chamber defined parallel to the attachment axis is between 1 mm and 30 mm, And / or, the cross-sectional area of the reaction chamber defined parallel to the mounting surface is between 400 mm ２ and 50,000 mm ２ therebetween, The fireproof fixing device according to any one of claims 1 to 7.

9. The sum of the cross-sectional areas of all reaction chambers defined perpendicular to the mounting shaft is at least 2,500 mm ２ is The fireproof fixing device according to any one of claims 1 to 8.

10. The frame has a first fixing point for screwing to the mounting surface. The frame has a second fixing point for screwing the door actuator or a mounting plate positioned between the frame and the door actuator to the frame. The fireproof fixing device according to any one of claims 1 to 9.

11. Each of the first fixing points and the second fixing points adjacent to each other form a pair, and the distance between the first fixing point and the second fixing point in the pair is at most 5 times the thickness of the frame. The fireproof fixing device according to claim 10.

12. An assembly comprising a door actuator and the fireproof fixing device according to any one of claims 1 to 9, wherein the frame is an integral component of the door actuator.

13. An assembly comprising a door actuator and the fireproof fixing device according to any one of claims 1 to 11, wherein the door actuator can be fixed to the frame.

14. An assembly comprising a door actuator and the fireproof fixing device according to claim 10, wherein the mounting plate can be fixed to the frame, and the door actuator can be fixed to the mounting plate.

Images