Automatic door closer for fire door

Abstract

The utility model discloses an automatic door closer of fireproof door, including door closer shell, installation frame, the gear is rotationally arranged in the door closer shell inside, the door closer shell bottom fixed assembly, fixed assembly includes the sliding slot, sliding plate, the first spring is provided with in the sliding slot inboard bottom, the first spring connects the sliding plate, the sliding plate is with the sliding connection of sliding slot, the both sides of sliding plate top are provided with fixed block, the gear bottom is with the one side of door closer shell bottom and is provided with fixed mouth, the fixed block is disassembled in fixed mouth, the utility model: open the fireproof door to the appropriate position to make two fixed blocks butt joint two fixed mouth, make the inclined block dismount in the rectangular mouth through the outside pull, promote the sliding plate through the first spring to make two fixed blocks insert two fixed mouth, namely installation frame can not slide, the gear can not rotate to make the fireproof door can not close, namely convenient building internal personnel escape.

Description

Technical Field

[0001] This utility model relates to the technical field of fire door closers, specifically an automatic door closer for fire doors. Background Technology

[0002] Fire doors are doors that meet the requirements of fire resistance stability, integrity, and thermal insulation within a certain period of time. They are fire-resistant partitions with a certain degree of fire resistance, installed in fire compartments, evacuation stairwells, vertical shafts, and other similar locations. Specifically used in building construction to isolate fire sources, they play a crucial role in fire prevention, providing people with an escape route in the event of a fire. A fire door closer is a device installed on a fire door, mainly composed of a main mechanism, spring mechanism, and power mechanism. It controls the opening and closing of the fire door, ensuring it closes automatically in the event of a fire.

[0003] Although fire doors equipped with fire door closers can close automatically, in the event of a fire inside a building with a large number of people inside, the fire door closers cause the fire door to close automatically every time it is opened. This means that the fire door needs to be opened again when more people need to evacuate, which greatly affects the evacuation efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic door closer for fire doors to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An automatic door closer for a fire door includes a door closer housing and a mounting frame. A gear is rotatably disposed inside the door closer housing, and a bottom fixing component is provided for the door closer housing.

[0007] The fixing component includes a slide groove and a slide plate. A first spring is provided at the bottom of the inner side of the slide groove. The first spring is connected to the slide plate. The slide plate is slidably connected to the slide groove. Fixing blocks are provided on both sides of the top of the slide plate. Fixing openings are provided at the bottom of the gear and on one side of the bottom of the door closer housing. The fixing blocks are installed and removed in the fixing openings.

[0008] In a preferred embodiment of this utility model, a rack is provided on one side inside the mounting frame, and the rack meshes with a gear.

[0009] In a preferred embodiment of this utility model, the door closer housing is provided with limit rails on both sides inside, and the mounting frame is provided with limit wheels on both sides outside, with the limit wheels and limit rails being slidably connected.

[0010] In a preferred embodiment of this utility model, a door closing spring is provided on one side inside the door closer housing, and the door closing spring is connected to the mounting frame.

[0011] In a preferred embodiment of the present invention, a hexagonal groove is provided on one side of the slide groove, a hexagonal block is slidably disposed inside the hexagonal groove, an inclined block is provided on the inner side of the hexagonal block, and a rectangular opening is provided on one side of the slide plate, and the inclined block is installed and removed in the rectangular opening.

[0012] In a preferred embodiment of this utility model, a second spring is provided on one side inside the hexagonal slot, and the second spring is connected to the hexagonal block.

[0013] In a preferred embodiment of this utility model, a screw hole is provided on the outer side of the hexagonal block, and a bolt is provided inside the screw hole, with the bolt and the screw hole being threadedly connected.

[0014] In a preferred embodiment of this utility model, the bolt is provided with a plug at the top, and the hexagonal groove is provided with two sockets on the outer top, and the plug is installed and removed in the sockets.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0016] Beneficial effects: When the inclined block is inserted into the rectangular opening, or when it is disassembled in the rectangular opening, the block aligns with different sockets. That is, by rotating the bolt, the block is inserted into the socket, thus fixing the hexagonal block and the inclined block, ensuring normal use. When it is necessary to open the fire door to allow people inside the building to evacuate, by releasing the fixing of the hexagonal block and the inclined block, when the fire door is opened to the appropriate position, the two fixing blocks align with the two fixing sockets. By pulling the inclined block from the outside, the inclined block is disassembled in the rectangular opening, thus releasing the fixing of the sliding plate. At this time, the first spring pushes the sliding plate, thus causing the two fixing blocks to insert into the two fixing sockets. That is, the mounting frame cannot slide and the gear cannot rotate, thus preventing the fire door from closing, facilitating the escape of people inside the building and ensuring evacuation efficiency.

[0017] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the main structure of an automatic door closer for a fire door;

[0020] Figure 2 This is a schematic diagram of the internal structure of the door closer housing in an automatic door closer for a fire door.

[0021] Figure 3 A schematic diagram of the mounting frame and gear bottom structure in an automatic door closer for a fire door;

[0022] Figure 4 This is a schematic diagram of the internal structure of the slide rail in an automatic door closer for a fire door.

[0023] Figure 5 This is a schematic diagram of the hexagonal groove in an automatic door closer for a fire door.

[0024] In the diagram: 1. Door closer housing; 11. Mounting frame; 12. Limiting rail; 13. Rack; 14. Limiting wheel; 15. Gear; 16. Door closing spring; 2. Slide track; 21. Slide plate; 22. Fixing block; 23. Fixing opening; 24. First spring; 25. Rectangular opening; 3. Hexagonal slot; 31. Hexagonal block; 32. Wedge block; 33. Screw opening; 34. Second spring; 35. Bolt; 36. Insert block; 4. Insertion port. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] Please refer to Figures 1-5 This utility model discloses an automatic door closer for fire doors, comprising a door closer housing 1 and a mounting frame 11. The door closer housing 1 is the outer shell of the door closer. A gear 15 is rotatably mounted inside the door closer housing 1. A rack 13 is mounted on one side inside the mounting frame 11, and the rack 13 meshes with the gear 15. A closing spring 16 is mounted on one side inside the door closer housing 1, and the closing spring 16 is connected to the mounting frame 11. The mounting frame 11, gear 15, rack 13, and closing spring 16 are all existing door closer structures, that is, they work in conjunction with an upper connecting rod. The upper connecting rod is fixedly connected to the top of the gear 15, and the other side of the connecting rod contains all other structures of the door closer. The fire door is automatically closed. When the door is opened, the upper connecting rod drives the gear 15 to rotate. Through transmission, the mounting frame 11 slides, and the closing spring 16 retracts. Then, the closing spring 16 pushes the mounting frame 11, causing the gear 15 to rotate in the opposite direction, thus automatically closing the door.

[0027] The door closer housing 1 has limit rails 12 on both sides inside. The mounting frame 11 does not directly contact the door closer housing 1. The mounting frame 11 has limit wheels 14 on both sides outside. The limit wheels 14 are slidably connected to the limit rails 12. That is, the limit rails 12 limit the limit wheels 14, so that the mounting frame 11 remains stable when sliding, and the limit wheels 14 roll to reduce friction.

[0028] The bottom fixing component of the door closer housing 1 includes a slide 2 and a slide plate 21. A first spring 24 is provided on the bottom inner side of the slide 2, and the first spring 24 is connected to the slide plate 21. The slide plate 21 is slidably connected to the slide 2. Fixing blocks 22 are provided on both sides of the top of the slide plate 21. The bottom of the gear 15 and one side of the bottom of the door closer housing 1 are provided with fixing holes 23. The fixing blocks 22 are installed and removed in the fixing holes 23. When the fire door is opened to the appropriate position, the two fixing blocks 22 are just aligned with the two fixing holes 23. At this time, the slide plate 21 is pushed by the first spring 24, so that the two fixing blocks 22 are inserted into the two fixing holes 23, that is, the mounting frame 11 cannot slide and the gear 15 cannot rotate, so that the fire door cannot be closed, which facilitates the escape of people inside the building. By pulling the slide plate 21 at the bottom, the fixing blocks 22 are removed from the fixing holes 23.

[0029] A hexagonal groove 3 is provided on one side of the inner side of the slide 2. A hexagonal block 31 is slidably arranged inside the hexagonal groove 3. An inclined block 32 is provided on the inner side of the hexagonal block 31. A rectangular opening 25 is provided on one side of the slide plate 21. The inclined block 32 is installed and removed in the rectangular opening 25. A second spring 34 is provided on one side of the inner side of the hexagonal groove 3. The second spring 34 is connected to the hexagonal block 31. Under normal conditions, the inclined block 32 is inserted into the rectangular opening 25, thereby fixing the slide plate 21 and fixing the block 22 in the slide 2, that is, not fixing the door closer, ensuring normal use. By pulling the inclined block 32 from the outside, the inclined block 32 is removed from the rectangular opening 25, that is, the fixing of the slide plate 21 is released.

[0030] The hexagonal block 31 has a screw hole 33 on its outer side, and a bolt 35 is installed inside the screw hole 33. The bolt 35 is threadedly connected to the screw hole 33. The top of the bolt 35 has a plug 36. The top of the outer side of the hexagonal slot 3 has two sockets 4. The plug 36 is installed and removed in the sockets 4. When the wedge block 32 is inserted into the rectangular opening 25, or when it is removed from the rectangular opening 25, the plug 36 is connected to the different sockets 4 respectively. That is, by rotating the bolt 35, the plug 36 is inserted into the socket 4, thus fixing the hexagonal block 31 and the wedge block 32, thus ensuring normal use. The bolt 35 and the plug 36 are additional structures, and their use is optional according to the actual situation.

[0031] The working principle of this utility model is as follows: When the door opens, the upper connecting rod drives the gear 15 to rotate, which in turn causes the mounting frame 11 to slide. The closing spring 16 then retracts, pushing the mounting frame 11 and causing the gear 15 to rotate in the opposite direction, thus automatically closing the door. The limiting rail 12 limits the limiting wheel 14, and the rolling of the limiting wheel 14 reduces friction.

[0032] Under normal conditions, the inclined block 32 is inserted into the rectangular opening 25, thereby fixing the sliding plate 21 and the fixing block 22 is in the sliding groove 2, meaning the door closer is not fixed. When the inclined block 32 is inserted into the rectangular opening 25, or when it is removed from the rectangular opening 25, the insert block 36 aligns with different insertion ports 4, that is, by rotating the bolt 35, the insert block 36 is inserted into the insertion port 4, thus fixing the hexagonal block 31 and the inclined block 32, ensuring normal use. When it is necessary to open the fire door to allow personnel inside the building to evacuate, the door closer is opened. By releasing the fixation of the hexagonal block 31 and the inclined block 32, when the fire door is opened to the appropriate position, the two fixing blocks 22 are just aligned with the two fixing holes 23. By pulling the inclined block 32 from the outside, the inclined block 32 is disassembled in the rectangular opening 25, thus releasing the fixation of the sliding plate 21. At this time, the sliding plate 21 is pushed by the first spring 24, so that the two fixing blocks 22 are inserted into the two fixing holes 23, that is, the mounting frame 11 cannot slide and the gear 15 cannot rotate, thus preventing the fire door from closing, which facilitates the escape of people inside the building.

[0033] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An automatic door closer for a fire door, characterized in that: Includes a door closer housing (1) and a mounting frame (11), wherein a gear (15) is rotatably provided inside the door closer housing (1) and a bottom fixing assembly of the door closer housing (1); The fixing component includes a slide groove (2) and a slide plate (21). A first spring (24) is provided at the bottom of the inner side of the slide groove (2). The first spring (24) is connected to the slide plate (21). The slide plate (21) is slidably connected to the slide groove (2). Fixing blocks (22) are provided on both sides of the top of the slide plate (21). Fixing openings (23) are provided at the bottom of the gear (15) and on one side of the bottom of the door closer housing (1). The fixing blocks (22) are installed and removed in the fixing openings (23).

2. The automatic door closer for a fire door according to claim 1, characterized in that, A rack (13) is provided on one side inside the mounting frame (11), and the rack (13) meshes with the gear (15).

3. The automatic door closer for a fire door according to claim 1, characterized in that, The door closer housing (1) has a limit rail (12) on both sides inside, and the mounting frame (11) has a limit wheel (14) on both sides outside. The limit wheel (14) is slidably connected to the limit rail (12).

4. The automatic door closer for a fire door according to claim 1, characterized in that, A door closing spring (16) is provided on one side inside the door closer housing (1), and the door closing spring (16) is connected to the mounting frame (11).

5. An automatic door closer for a fire door according to claim 1, characterized in that, A hexagonal groove (3) is provided on one side of the slide (2), a hexagonal block (31) is slidably arranged inside the hexagonal groove (3), an inclined block (32) is provided on the inner side of the hexagonal block (31), a rectangular opening (25) is provided on one side of the slide plate (21), and the inclined block (32) is installed and removed in the rectangular opening (25).

6. An automatic door closer for a fire door according to claim 5, characterized in that, A second spring (34) is provided on one side inside the hexagonal slot (3), and the second spring (34) is connected to the hexagonal block (31).

7. An automatic door closer for a fire door according to claim 5, characterized in that, The hexagonal block (31) has a screw hole (33) on its outer side, and a bolt (35) is provided inside the screw hole (33). The bolt (35) is threadedly connected to the screw hole (33).

8. An automatic door closer for a fire door according to claim 7, characterized in that, The bolt (35) is provided with a plug (36) at the top, and the hexagonal groove (3) is provided with two sockets (4) on the top of the outer side, and the plug (36) is installed and removed in the sockets (4).

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