Fire door with self-closing buffer structure

Abstract

The utility model relates to fireproof door technical field, concretely is a kind of fireproof door with self-closing buffer structure, including installation body, the door body is installed on installation body, handle is equipped in the outside of door body, and buffer cavity is equipped in the inside, buffer plate is arranged in buffer cavity, through the linkage structure of buffer plate, multiple groups of connecting rods, sliding block and buffer spring, the limiting effect of cooperating guide column to sliding track, form multistage buffer system, when door body closes, buffer plate first contact external force and drive connecting rod through extension part, make sliding block slide along guide column and compress buffer spring, impact force is dispersed to multiple buffer nodes, simultaneously, the buffer groove on solid block and the buffer column of buffer plate form secondary buffering, rubber layer further absorbs residual impact force, effectively avoid the rigid collision of door body and installation body, reduce mechanical loss, ensure that door body closing process is stable without violent vibration, improve the service life of overall structure.

Description

Technical Field

[0001] This utility model relates to the field of fire door technology, specifically a fire door with a self-closing buffer structure. Background Technology

[0002] In the existing technology, fire doors, as an important part of building fire protection facilities, are mainly used to block the spread of fire and the diffusion of smoke. Their fire resistance is usually achieved by using high-temperature resistant materials.

[0003] However, in actual use, the closing process of fire doors often results in a violent collision between the door and the frame due to the lack of an effective buffer structure. This not only easily causes mechanical damage to the door and frame and shortens their service life, but may also reduce the sealing performance of the door due to the impact force generated by the collision, affecting the fireproof and smoke-proof effect. Therefore, this utility model proposes a fire door with a self-closing buffer structure to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a fire door with a self-closing buffer structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fire door with a self-closing buffer structure, comprising an installation body, a door body installed on the installation body, a handle on the outside of the door body, a buffer cavity inside the door body, a buffer plate in the buffer cavity, and the buffer plate being connected to a buffer mechanism installed in the buffer cavity of the door body;

[0006] The buffer mechanism consists of multiple sets of connecting rods, multiple sets of sliding blocks, and multiple sets of buffer springs. Each set of connecting rods is connected to each set of sliding blocks, each set of sliding blocks is connected to the buffer springs, and each set of buffer springs is connected to the buffer cavity sidewall of the door.

[0007] The buffer plate has multiple sets of extensions on one side, and the buffer plate is hinged to multiple sets of connecting rods through the multiple sets of extensions on one side.

[0008] Preferably, the buffer spring has connecting blocks integrated at both ends.

[0009] Preferably, the buffer mechanism further includes two sets of guide posts, which are arranged laterally in the buffer cavity of the door body, and each set of guide posts passes through two sets of sliding blocks and two sets of buffer springs.

[0010] Preferably, the door body is rotatably connected to the mounting body via a movable shaft provided thereon, and a torsion spring structure is sleeved on the movable shaft.

[0011] Preferably, a rectangular groove is provided on one side of the door body, one end of the guide post extends from the buffer cavity of the door body to the outside of the rectangular groove, the other end of the guide post is provided with a thread, and the threaded end of the guide post is spirally installed on the side wall of the door body.

[0012] Preferably, the buffer cavity of the door body is further provided with a solid block.

[0013] Preferably, the solid block has four sets of buffer grooves arranged in a matrix on the side facing the buffer plate, and the inner wall of each set of buffer grooves is fitted with a rubber layer. The buffer plate has four sets of buffer columns on the side facing the solid block, and the outer diameter of each set of buffer columns is adapted to the inner diameter of the buffer groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The linkage structure consisting of a buffer plate, multiple sets of connecting rods, sliding blocks, and buffer springs, combined with the guide post's limiting effect on the sliding trajectory, forms a multi-level buffer system. When the door closes, the buffer plate first contacts the external force and drives the connecting rod through the extension, causing the sliding block to slide along the guide post and compress the buffer spring, dispersing the impact force to multiple buffer nodes. At the same time, the buffer groove on the solid block and the buffer post of the buffer plate form a secondary buffer, and the rubber layer further absorbs the residual impact force, effectively avoiding hard collisions between the door and the installation body, reducing mechanical wear, ensuring a smooth door closing process without violent vibration, and improving the service life of the overall structure.

[0016] The buffer mechanism integrates multiple components into the buffer cavity inside the door body. The size of the buffer plate is adapted to the buffer cavity. The guide post is securely installed through rectangular grooves and threaded structure. The layout of each component is compact and the connection method is simple. The cooperation between the movable shaft and the torsion spring structure realizes the door's self-closing function, eliminating the need for an additional external buffer device. This saves installation space and avoids the defects of external structures being susceptible to environmental influences. In addition, the threaded connection of the guide post is easy to disassemble and maintain, and the buffering force can be flexibly adjusted according to actual usage needs to adapt to the installation requirements of different building scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the internal structure of the door body of this utility model.

[0019] Figure 3 This is a schematic diagram of the installation structure of the buffer plate and buffer mechanism of this utility model.

[0020] Figure 4 This is a schematic diagram of the connection structure of the buffer spring, sliding block and guide post of this utility model.

[0021] In the diagram: 1. Mounting body; 2. Door body; 21. Handle; 211. Movable shaft; 22. Rectangular groove; 3. Buffer plate; 31. Extension; 32. Buffer post; 4. Buffer mechanism; 41. Connecting rod; 42. Sliding block; 43. Guide post; 431. Thread; 44. Buffer spring; 441. Connecting block; 5. Solid block; 51. Buffer groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1 to 4 This utility model provides a technical solution: a fire door with a self-closing buffer structure, including a mounting body 1, a door body 2 mounted on the mounting body 1, a handle 21 on the outside of the door body 2, a buffer cavity inside the door body 2, a buffer plate 3 in the buffer cavity, and the buffer plate 3 connected to a buffer mechanism 4 installed in the buffer cavity of the door body 2. The buffer mechanism 4 is composed of multiple sets of connecting rods 41, multiple sets of sliding blocks 42, and multiple sets of buffer springs 44. The buffer springs 44 have connecting blocks 441 integrally formed at both ends. Each set of connecting rods 41 is connected to each set of sliding blocks 42, each set of sliding blocks 42 is connected to the buffer springs 44, and each set of buffer springs 44 is connected to the side wall of the buffer cavity of the door body 2. The buffer plate 3 has multiple sets of extensions 31 on one side, and the buffer plate 3 is hinged to the multiple sets of connecting rods 41 through the multiple sets of extensions 31 on one side.

[0024] Among them, the buffer plate 3 is made of flame-retardant material, the metal parts are resistant to high temperature, and together with the fireproof structure of the door 2, it forms an overall barrier to maintain the structural integrity in high temperature environment.

[0025] Through the linkage structure of buffer plate 3, connecting rod 41, sliding block 42, and buffer spring 44, combined with the limiting of guide post 43, the impact force is dispersed and absorbed, reducing collision damage to door 2 and extending service life.

[0026] Please see Figures 1 to 4 The buffer mechanism 4 also includes two sets of guide posts 43, which are arranged laterally in the buffer cavity of the door body 2. Each set of guide posts 43 passes through two sets of sliding blocks 42 and two sets of buffer springs 44.

[0027] Please see Figures 1 to 4 The door body 2 is rotatably connected to the mounting body 1 via a movable shaft 211, and a torsion spring structure is sleeved on the movable shaft 211.

[0028] Please see Figures 1 to 4 A rectangular groove 22 is provided on one side of the door body 2. One end of the guide post 43 extends from the buffer cavity of the door body 2 to the outside of the rectangular groove 22. The other end of the guide post 43 is provided with a thread 431. The threaded end of the guide post 43 is spirally installed on the side wall of the door body 2.

[0029] Please see Figures 1 to 4 The buffer cavity of the door body 2 is also provided with a solid block 5. The solid block 5 has four sets of buffer grooves 51 arranged in a matrix on the side facing the buffer plate 3. The inner wall of each set of buffer grooves 51 is covered with a rubber layer. The buffer plate 3 has four sets of buffer pillars 32 on the side facing the solid block 5. The outer diameter of each set of buffer pillars 32 is adapted to the inner diameter of the buffer groove 51.

[0030] When using:

[0031] When the user pulls the door 2 through the handle 21, the door 2 rotates around the movable shaft 211. (The torsion spring structure on the movable shaft 211 is a mature existing technology, and its specific structure and power storage method will not be described in detail here.) At this time, the buffer mechanism 4 is in the initial state, the buffer spring 44 has not deformed, the sliding block 42 is in the initial position on the guide post 43, the buffer plate 3 is in a relatively static state in the buffer cavity, and the buffer post 32 is separated from the buffer groove 51 on the solid block 5. After the user releases the handle 21, the torsion spring structure on the movable shaft 211 releases the stored power, causing the door 2 to rotate around the movable shaft 211 toward the mounting body 1, and the self-closing process begins.

[0032] When the buffer plate 3 is subjected to external impact force or impact force generated by the closing of the door 2, the buffer plate 3 moves into the buffer cavity. Multiple sets of extensions 31 on one side push multiple sets of connecting rods 41 to move. The connecting rods 41 drive the sliding block 42 connected to it to slide along the guide post 43 towards the side wall of the buffer cavity. The sliding block 42 pushes the buffer spring 44, causing the buffer spring 44 to undergo compression deformation. The connecting blocks 441 at both ends of the buffer spring 44 are in close contact with the sliding block 42 and the side wall of the buffer cavity, respectively, converting the impact force into the elastic potential energy of the buffer spring 44, achieving initial buffering. During the process of the sliding block 42 sliding along the guide post 43, the guide post 43 plays a guiding and limiting role in the movement of the sliding block 42, ensuring that the sliding block 42 and the buffer spring 44 move in a straight line, avoiding deviation that affects the buffering effect. At the same time, the buffer plate 3 continues to move, and the buffer post 32 on one side gradually inserts into the corresponding buffer groove 51 on the solid block 5. The buffer post 32 contacts and squeezes the rubber layer on the inner wall of the buffer groove 51, causing the rubber layer to deform and further absorb the residual impact force, forming a secondary buffer.

[0033] When the deformation of the buffer spring 44 and the rubber layer reaches its maximum, the elastic potential energy is gradually released, which drives the sliding block 42, the connecting rod 41 and the buffer plate 3 to reset. The door 2 closes smoothly under the action of the torsion spring structure and fits tightly with the mounting body 1, completing the entire self-closing buffer process.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A fire door with a self-closing buffer structure, comprising a mounting body (1), a door body (2) mounted on the mounting body (1), a handle (21) on the outside of the door body (2), a buffer cavity inside the door body (2), a buffer plate (3) disposed in the buffer cavity, and the buffer plate (3) connected to a buffer mechanism (4) installed in the buffer cavity of the door body (2), characterized in that: The buffer mechanism (4) consists of multiple sets of connecting rods (41), multiple sets of sliding blocks (42), and multiple sets of buffer springs (44). Each set of connecting rods (41) is connected to each set of sliding blocks (42), each set of sliding blocks (42) is connected to the buffer springs (44), and each set of buffer springs (44) is connected to the buffer cavity sidewall of the door body (2). The buffer plate (3) has multiple extensions (31) on one side, and the buffer plate (3) is hinged to multiple connecting rods (41) through the multiple extensions (31) on one side.

2. A fire door with self-closing buffering structure according to claim 1, characterized in that: The buffer spring (44) has a connecting block (441) at both ends.

3. A fire door with a self-closing buffer structure according to claim 1, characterized in that: The buffer mechanism (4) also includes two sets of guide posts (43), which are arranged laterally in the buffer cavity of the door body (2). Each set of guide posts (43) passes through two sets of sliding blocks (42) and two sets of buffer springs (44).

4. A fire door with a self-closing buffer structure according to claim 3, characterized in that: The door body (2) is rotatably connected to the mounting body (1) via a movable shaft (211) thereon, and a torsion spring structure is sleeved on the movable shaft (211).

5. A fire door with a self-closing buffer structure according to claim 4, characterized in that: A rectangular groove (22) is provided on one side of the door body (2). One end of the guide post (43) extends from the buffer cavity of the door body (2) to the outside of the rectangular groove (22). The other end of the guide post (43) is provided with a thread (431). The threaded end of the guide post (43) is spirally installed on the side wall of the door body (2).

6. A fire door with a self-closing buffer structure according to claim 3, characterized in that: The buffer cavity of the door body (2) is also provided with a solid block (5).

7. A fire door with a self-closing buffer structure according to claim 6, characterized in that: The solid block (5) has four sets of buffer grooves (51) arranged in a matrix on the side facing the buffer plate (3). The inner wall of each set of buffer grooves (51) is fitted with a rubber layer. The buffer plate (3) has four sets of buffer columns (32) on the side facing the solid block (5). The outer diameter of each set of buffer columns (32) is adapted to the inner diameter of the buffer groove (51).

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