Fireproof fixture 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 fire fastener for fastening a door actuator.The present invention also shows an assembly comprising a door actuator together with a fire fastener. [Background technology]

[0002] Door actuators are used to open and close doors. In particular, door closers and door drives are designated as door actuators. Generally, door closers are manually operated. The movement of Spring Accumulator Charge the In this case, close the door For To , stored Energy is used, for example in door drives, which automatically open doors using electrical or hydraulic mechanisms. and / or closed Jill It becomes possible.

[0003] Typically, door actuators are fixed to a mounting surface, i.e. the door or casing, or to a wall. It should be noted that, especially in fire-rated doors, flammable fluids, e.g. hydraulic fluids, are often used in door actuators. In case of fire, appropriate measures can be taken as far as possible to prevent the fluid in the door actuator from overheating and catching fire.

[0004] The object of the invention is to indicate a fire-safety fixing device for a door actuator, which makes it possible to fix the door actuator with operational reliability and at the same time to meet the safety requirements, in particular in the event of a fire.

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

[0006] The present invention describes a fire-stop fastening for fastening a door actuator. As mentioned in the introduction, a door closer or a door drive is a door actuator. A door actuator is intended to be fastened to a mounting surface. Among other things, a door, a casing or a wall forms said mounting surface.

[0007] The fire fastening comprises a frame. According to an embodiment of the invention, the frame is formed to be arranged between the door actuator and the mounting surface. If a separate mounting plate is omitted, in this case the door actuator rests directly on the front side of the frame. The rear side of the frame faces the mounting surface and is in particular rests directly on the mounting surface. As will be explained in more detail, a mounting plate can be used between the frame of the fire fastening and the door actuator. In this particular case the mounting plate is screwed to the frame of the fire fastening and the door actuator is fixed to the mounting plate.

[0008] In another arrangement, the frame of the fire fastener is provided as an integral component of the door actuator, this arrangement will also be described in more detail below.

[0009] In describing the invention, a mounting axis is defined. The mounting axis is perpendicular to the frame, in particular perpendicular to the rear face of the frame. Furthermore, 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 an output axis of the door actuator. Via said output axis, the door actuator is connected to the door or to the wall, for example via an arm assembly.

[0010] At least one reaction chamber is formed in the frame of the fire fastening. In a preferred configuration, the frame comprises 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 invention is mainly described on the basis of one reaction chamber, but it is always intended that several reaction chambers are formed in the same way. However, the reaction chambers may differ in size so that for each geometric configuration of the fire fastening, the maximum possible number of reaction chambers with the maximum possible surface can be used.

[0011] The frame delimits each reaction chamber all around. With respect to its depth, the reaction chamber extends parallel to the mounting axis. The periphery of the reaction chamber is therefore also defined about an axis parallel to the mounting axis. The reaction chamber is open at the rear and / or front side of the frame. If the reaction chamber is open on both sides, i.e. the front and the rear side, then it is a through gap in the frame that is of issue. If the reaction chamber is only open on one of the two sides, then it is especially a pocket formed in the frame that is of issue.

[0012] A drive element is disposed in each reaction chamber. The drive element is fabricated from a thermally expansible material. When thermally activated, i.e., correspondingly heated, the drive element is configured to push the door actuator away from the mounting surface. In particular, the thermally activated material of the drive element is provided to activate in a temperature range of 90 degrees Celsius to 200 degrees Celsius.

[0013] The drive element is made, inter alia, of a material in the form of a two-dimensional plate that can be cut arbitrarily, which material is available in a certain thickness and is preferably provided in several layers laid one on top of the other to form the drive element, the layers then coming together to form the drive element.

[0014] When the thermally expandable material is activated, the volume of said material increases, for example by foaming. Because the drive element is disposed in the reaction chamber and because the frame bounds the reaction chamber all around, the drive element only expands in a direction parallel to the mounting axis. Due to the perimeter bounding, the frame blocks the drive element from expanding in a direction perpendicular thereto.

[0015] As already mentioned, as a separate component, the frame can be placed between the door actuator and the mounting surface. If necessary, a mounting plate can be located between the frame and the door actuator. In this arrangement of the frame, the reaction chamber can be open at both the front and the rear. It is clear that when thermally activated, the drive element expands in a direction parallel to the mounting axis, thereby pushing the door actuator away from the mounting surface. Whether the frame is also pushed away or remains in the plane of the mounting surface is not relevant to the basic function of the invention.

[0016] In this configuration where the frame is an integral component of the door actuator, among other things, a reaction chamber is provided that is open at the rear face to urge the door actuator together with its integral frame away from the mounting surface.

[0017] If it is realized that the thermally activated drive element or drive elements in the individual reaction chambers push the door actuator away from the mounting surface, for example the male thread of the screw or the corresponding female thread breaks, causing the door actuator to peel off from the mounting surface, i.e. the door, the casing or the wall. Particularly in this case, the door actuator is located on the side of the door facing away from the fire. The door actuator peeling off from the mounting surface prevents the door actuator from overheating and thus the fluid in the door actuator from igniting.

[0018] In a preferred embodiment, the fire fixing device is provided including a piston plate disposed in the reaction chamber. In particular, the piston plate is so disposed in the reaction chamber, with the mounting axis perpendicular to the piston plate. When several reaction chambers are employed, one drive element and one respective preferred piston plate are located in each reaction chamber.

[0019] In particular, the piston plate is made of a hard material and is adapted to be deflected by the drive element when the drive element is thermally activated. In particular, the piston plate is provided to be guided into the reaction chamber. In particular, the deflection direction is 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 expansive material of the drive element is not squeezed through the gap via the piston plate. Upon activation, i.e. when expansion of the drive element occurs, both the drive element and the piston plate can leave the reaction chamber.

[0020] Basically the piston plates can be arranged on the front or rear side of the drive element, it is also possible to arrange one respective piston plate on each side of the drive element, so that two piston plates are provided for each reaction chamber.

[0021] The piston plates, which may be referred to as pressure distribution plates or pressure adjustment plates, ensure that the pressure exerted by the drive elements is transferred to as large a surface area as possible, and they ensure that the drive elements do not expand idle in the hollow space, for example in the split rear surface of the door actuator, when thermally activated.

[0022] The piston plate is preferably provided manufactured from a metal, such as aluminum, which provides a piston plate that is strong, lightweight in construction and easily manufactured.

[0023] However, in many applications, a thermally insulating construction of the fire-stop fastening device 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, thermally insulating material. create Preferably, the piston plate is made of a non-metallic, heat-insulating material. Alternatively, the piston plate arranged between the drive element and the mounting surface can be provided, manufactured of a metallic, heat-conducting material. This allows a rapid heat input from the mounting surface into the drive element, so that the volume of the expansive material increases quickly. Thus, it can be provided that the drive element is surrounded by two further piston plates, in particular two piston plates with different thermal conductivities.

[0024] In particular, when manufacturing piston plates made exclusively of heat-insulating materials, it is necessary to adhere to the use of suitable stable materials to realize the hard piston plate. Suitable plastic materials are suitable for this purpose.

[0025] In addition to, or as an alternative to, the use of a thermally insulating material for the piston plate, it is preferred to provide for at least one blocking plate made of a non-metallic, thermally insulating material to be mounted on at least one surface of the piston plate. composite It is preferably made of fibers.

[0026] If the blocking plate is located between the piston plate and the drive element, it is in particular located in the reaction chamber, if the blocking plate is located on the face of the piston plate facing away from the drive element, it can be located outside the reaction chamber.

[0027] The individual reaction chambers have a cross-sectional area perpendicular to the mounting axis. In particular, the cross-sectional area of ​​said reaction chambers is rectangular, since this geometric configuration allows as many reaction chambers as possible, or reaction chambers with a large surface area, to be distributed over 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 shutoff plate are provided extending over the entire cross-sectional area.

[0028] The reaction chamber is preferably open on both sides, i.e. the front and the rear. In particular, the reaction chamber is open on both respective sides over the entire cross section. The open rear side of the reaction chamber is advantageous in that the drive element can be in direct contact with the mounting surface. This ensures that the drive element is heated as quickly and sufficiently as possible in the event of a fire. Via the open front side, the drive element can expand in the direction of the door actuator and respectively pushes the piston plate in the direction of the door actuator.

[0029] The fire-stop fastener is formed as flat as possible and is configured so that it can be placed 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 said reaction chambers is preferably between 1 mm and 30 mm, in particular between 5 mm and 20 mm. This provides sufficient construction space for placing the drive element and, if necessary, also the piston plate in the reaction chamber.

[0030] The cross-sectional area of ​​the individual reaction chambers is defined perpendicular to the mounting axis. The area is 400 mm 2 From 50,000mm 2 Preferably, the distance is between 900 mm and 900 mm. 2 From 10,000mm 2 It is preferable that the temperature is between 100° C. and 200° C.

[0031] When using several reaction chambers, the sum of all cross-sectional areas is also a concern, because the larger the cross-sectional area, the greater the force required 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 , especially at least 5,000 mm 2 It is preferable that:

[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, inter alia, the frame is provided with a first fastening point for screwing to the mounting surface. Also, a second fastening point is formed in the frame, at which the door actuator or possibly the mounting plate can be fastened to the frame. In particular, the fastening point is a through hole. In particular for the second fastening 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 fastening point.

[0033] The dimensions of the fixing points described herein are each referenced to their centre, i.e. the centre of the hole.

[0034] Each two first and second fastening points are preferably located next to each other and form a pair. For example, the right side of the frame is provided with two first fastening points and two second fastening points. Correspondingly, for example, the left side of the frame is provided with two first fastening points and two second fastening points. Thus, there are two pairs on each side of the frame.

[0035] With the intention of achieving the possibility of a direct force input to the fixing points, when pushing the door actuator away, the distance between the fixing points of a pair is preferably provided as short as possible. In particular, the distance between the first and second fixing points 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 at its thickest point. As an alternative, the thickness of the frame, respectively averaged, is determined in the area between the fixing points of a pair. If the distance between the fixing points of a pair is too long, it may happen that the frame is only deformed without the door actuator being detached from the frame.

[0036] Furthermore, the invention comprises a first assembly having a door actuator and a fire fastening device as described above, the frame of the fire fastening device being formed as an integral component of the door actuator. In particular, the door actuator comprises a housing, for example made by die casting. In particular, at least one hydraulic chamber with a non-flammable fluid is located in the housing. The frame is preferably formed in particular on the rear side of the door actuator, in particular on the housing. In particular, it is provided in this case 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 side of the frame.

[0037] The invention also comprises a second assembly having a door actuator and a fire fastening as described, the door actuator being capable of being fixed directly to the frame, in particular by screwing, preferably so that the frame of the fire fastening can be fixed, in particular screwed, directly to the mounting surface.

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

[0039] The advantageous configurations and the independent claims described for this inventive fire fastening find advantageous use for all three assemblies.

[0040] The invention will now be explained in more detail on the basis of exemplary embodiments, in which: [Brief description of the drawings]

[0041] [Figure 1] 1 is an inventive assembly having an inventive fire fastener according to a first exemplary embodiment; [Diagram 2] FIG. 2 is an expanded view of FIG.

[0042] [Diagram 3] 1 is a frame of an inventive fire fastening device according to a first exemplary embodiment. [Figure 4] The cross section AA is identified in Figs.

[0043] [Diagram 5] FIG. 13 is an exploded view of an inventive assembly having an inventive fire fastener according to a second exemplary embodiment.

[0044] [Figure 6] FIG. 13 is an exploded view of an inventive assembly having an inventive fire fastener according to a third exemplary embodiment. [Figure 7] A detail of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0045] In the following, several exemplary embodiments of the present invention are described, in which the same reference numbers identify identical, respectively functionally identical components of structure.

[0046] All exemplary embodiments show an assembly 100 having a door actuator 102. In the exemplary embodiments, the door actuator 102 is formed as a hydraulic door actuator. The door actuator 102 comprises an output shaft 103. Via said output shaft 103, the door actuator can be connected to a door or a casing, for example by means of an arm assembly.

[0047] The door actuator 102 is intended to be fixed to a mounting surface 101. A door, a casing or a wall, among others, forms said mounting surface 101. The mounting axis 2 is perpendicular to the mounting surface 101.

[0048] A fire fastening device 1 is used to fasten a door actuator 102 to a mounting surface 101. The fire fastening device 1 comprises a frame 3. In the first two exemplary embodiments according to Figures 1 to 5, said frame 3 is a separate structural part. In the third exemplary embodiment according to Figures 6 and 7, the frame 3 is an integral component of the door actuator 102.

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

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

[0051] 1 to 4 show a fire fastening 1 in an assembly 100 according to a first exemplary embodiment, in which a frame 3 having a rear face 5 is fixed to a mounting surface 101. A door actuator 102 is mounted directly to a front face 6 of the frame 3.

[0052] As represented in Figures 2 and 3, the frame 3 has four reaction chambers 4. A stack of drive elements 7, piston plates 8 and blocking plates 9 is located in each reaction chamber 4. In this case, the blocking plates 9 can be arranged outside the reaction chambers 4, as shown in the cross section of Figure 4.

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

[0054] As shown inter alia in the cross section of Fig. 4, the individual reaction chambers 4 are open on both sides. The drive element 7 rests directly on the mounting surface 101. When the drive element 7 is thermally activated, the piston plate 8 is pressed towards the door actuator 102. The drive element 7 and the piston plate 8 are located in the reaction chamber 4 such that the expanding mass of the drive element 7 does not enter the split rear surface of the door actuator 102, but the pressure is applied directly to the door actuator 102 via the piston plate 8.

[0055] Figure 3 shows the length 15 and width 16 of an individual reaction chamber 4. The length 15 and width 16 are measured perpendicular to the mounting axis 2 and determine the cross-sectional area of ​​the reaction chamber 4. Figure 4 depicts 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 its thickest point.

[0056] As shown in Fig. 4, the individual reaction chambers 4 have a boundary 10 all around. Said boundary 10 runs parallel to the mounting axis 2 with a protrusion 19. The protrusion 19 is measured 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] Figures 2, 3 and 4 show that the frame 3 may include at least one pocket 11 at the front side 6. Said pocket 11 forms an air-filled space which improves the thermal insulation of the frame 3, such that as little heat input as possible is realised through the frame 3 via the mounting surface 101 directly onto the door actuator 102. Such a pocket 11 may also be arranged at the rear side 5 of the frame 3. The pocket 11 may also be at least partially filled with a thermally insulating, in particular solid, material.

[0058] 3 shows a frame 3 that includes four first fastening points 12 and four second fastening points 13. The first fastening points 12 are used to screw the frame 3 to a mounting surface 101. The second fastening points 13 are used to screw a door actuator 102 to the frame 3. In a second exemplary embodiment, it is the mounting plate 30 that is screwed to the second fastening points 13, rather than the door actuator 102.

[0059] 3 represents a first and a second exemplary embodiment, in which one respective first fixing point 12 and one second fixing point 13, each formed as a hole, form a pair, in which the distance 14 between two corresponding fixing points 12, 13 is selected as small as possible.

[0060] 5 shows an exploded view of the fire fastening 1 in the assembly 100 according to the second exemplary embodiment, where the mounting plate 30 is disposed between the door actuator 102 and the frame 3. The mounting plate 30 is screwed to the frame 3 via the second fastening point 13.

[0061] In the second exemplary embodiment, the frame 3 has five reaction chambers 4. Here, one drive element 7, also consisting of two layers, is seated in each reaction chamber 4. A plate is arranged in front of each drive element 7, which can be formed as a piston plate 8 or a blocking plate 9. Also, two stacked plates can be used here, i.e. a piston plate 8 and at least one blocking plate 9.

[0062] In the second exemplary embodiment too, the reaction chamber 4 is open at the front side 6 and at the rear side 5. At the rear side 5, the drive element 7 rests directly on the mounting surface 101.

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

[0064] Reference List 1 Fire protection fixtures 2 Mounting shaft 3 Frame 4. Reaction Chamber 5 Rear 6 Front 7 Drive Elements 8 Piston Plate 9. Blocking Plate 10 boundaries 11 Pocket 12 First fixed point 13 Second Fixation Point 14 distance 15 Length 16 Width 17 Depth 18 Thickness 19 Protrusion 20 Contact surfaces 30 Mounting plate 100 Assembly 101 Mounting surface 102 Door actuator 103 Output shaft

Claims

1. A fire-retardant fastener for fastening a door actuator, comprising: a frame having a rear surface oriented toward a mounting surface, a mounting axis being defined perpendicular to said rear surface, said frame being configured to be disposed between a door actuator and said mounting surface or being an integral component of said door actuator; at least one reaction chamber formed in the frame, the frame delimiting the reaction chamber all around, the reaction chamber being open at the rear surface of the frame and / or at a front surface opposite the rear surface; a drive element disposed within the reaction chamber and formed from an expansive material, the drive element configured to urge the door actuator away from the mounting surface when thermally activated; and A fire-retardant fixture comprising:

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

3. 3. The fire-resistant fastener of claim 2, wherein the piston plate is made of a non-metallic, thermally insulating material or the piston plate includes at least one layer of a non-metallic, thermally insulating material.

4. A fire-resistant fixing device as described in claim 2 or 3, wherein at least one blocking plate made of a non-metallic, insulating material is attached to at least one surface of the piston plate.

5. 5. A fire-retarding fastening as claimed in claim 4, wherein the drive element and / or the piston plate and / or the blocking plate extend over the entire cross-sectional area of ​​the reaction chamber defined perpendicular to the mounting axis.

6. 6. A fire-retarding fixture according to any one of claims 1 to 5, wherein the reaction chamber is open on both sides.

7. 7. A fire secured fastener as claimed in any preceding claim, wherein the drive element is exposed at the rear face of the frame so as to be in direct contact with the mounting surface.

8. the depth of the reaction chamber, defined parallel to the mounting 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 less than 400 mm ２ From 50,000 mm ２ Between A fire fastening 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 axis, is at least 2,500 mm ２ That is, A fire-retardant fastening according to any one of claims 1 to 8.

10. the frame has a first fastening 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; A fire-retardant fastening according to any one of claims 1 to 9.

11. 11. The fire fastening device according to claim 10, wherein each adjacent first and second fastening point forms a pair, and the distance between the first and second fastening points of the pair is at most five times the thickness of the frame.

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

13. 12. An assembly comprising a door actuator and a fire fastening device according to any one of claims 1 to 11, said door actuator being capable of being fastened to the frame.

14. 11. An assembly comprising a door actuator and the fire fastening device of claim 10, wherein the mounting plate is capable of being fastened to the frame and the door actuator is capable of being fastened to the mounting plate.

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