Fireproof door self-locking floor spring

Abstract

The utility model discloses a self-locking floor spring of a fireproof door, and relates to the technical field of fireproof doors. The fireproof door comprises a fireproof door body, one corner of the fireproof door body is fixedly connected with an installation box through bolts, and an inner cavity of the installation box is fixedly connected with a limiting assembly and a bolt assembly. Through the linkage design of the limiting assembly and the plug pin assembly, the temporary fixing and automatic closing functions of the fireproof door can be achieved, when a person steps on the pedal, a pin rod of the plug pin assembly moves downwards and is inserted into a pin hole reserved in the ground, at the moment, a first spring pushes a limiting block to move to the top of a bearing plate to fix the pin rod, and the safety of the fireproof door is guaranteed. The door body is kept in an open state, so that multiple persons can conveniently and quickly pass; after the pedal is released, the push rod is squeezed by a foot, then the pin rod is driven by the second spring to move upwards to relieve limiting, the door body is slowly closed under the action of gravity, the problem that a traditional floor spring cannot stop the door halfway is solved through the design, and the passing efficiency of personnel and use convenience are remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of fire door technology, and in particular relates to a self-locking floor spring for fire doors. Background Technology

[0002] Fire doors are doors that can 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.

[0003] Fire doors equipped with floor springs can extend the closing speed so that people with disabilities can pass through slowly. For example, a floor spring fire door with publication number CN2825906Y includes a door frame, a door leaf, and a floor spring automatic closing device. The periphery of the door leaf is fixed with a thermal expansion sealing strip corresponding to the door frame, and a gap is left between the door frame and the thermal expansion sealing strip. However, the existing fire door floor springs can only close slowly. When multiple people need to pass through the fire door, one person needs to hold the door and it cannot stop in a short time, which makes it inconvenient for multiple people to enter and exit.

[0004] To address these issues, we provide a self-locking floor spring for fire doors. Utility Model Content

[0005] The purpose of this utility model is to provide a self-locking floor spring for fire doors. Through the cooperation of the pin assembly and the limiting assembly, it solves the problem in the prior art that when multiple people need to pass through a fire door, one person needs to hold the door and it cannot stop in a short time, which makes it inconvenient for multiple people to enter and exit.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a self-locking floor spring for fire doors, comprising a fire door body. A mounting box is bolted to one corner of the fire door body. A limit assembly and a pin assembly are fixedly connected to the inner cavity of the mounting box. The limit assembly includes a groove on the top side of the inner cavity of the mounting box. A slider is slidably connected to the inner cavity of the groove. A push rod is fixedly connected to one side of the slider. A limit block is fixedly connected to the bottom of the slider. A sliding rod is fixedly connected to one side of the limit block. A receiving tube is slidably connected to the surface of the sliding rod. A spring is sleeved on the surface of the receiving tube. Both ends of the spring are fixedly connected to the surfaces of the mounting box and the limit block, respectively. The pin assembly includes a spring two fixedly connected to the bottom side of the inner cavity of the mounting box. A pin is provided in the inner cavity of the spring two. A receiving plate is fixedly connected to the top of the pin. Connecting rods are fixedly connected to the front and back of the receiving plate. A pedal is movably connected to the surface of the connecting rod via a pin shaft.

[0008] The present invention is further provided that the front and back of one corner of the fire door body are provided with mounting grooves for fixing the mounting box, and the surface of the mounting box is movably connected to an inspection cover. The design of the mounting groove and the inspection cover facilitates the fixing of the mounting box and subsequent maintenance, thereby improving the overall aesthetics and maintainability of the device.

[0009] The present invention is further configured such that threaded holes are provided on the surface of the mounting groove, the surface of the inspection cover plate, and the back of the mounting box; threaded holes are provided on the surface of the mounting box and the inspection cover plate; countersunk bolts are threadedly connected to the inner cavity of threaded holes; and countersunk bolts are threadedly connected to the inner cavity of threaded holes; the first and second countersunk bolts fix the mounting box and the inspection cover plate respectively, ensuring that the structure is stable and the surface is flat, and avoiding bolt protrusion that may affect the closing of the door.

[0010] The present invention is further configured such that a circular hole 1 for the push rod is provided on the top of the outer side of the mounting box, and a circular hole 2 for the pin is provided on one side of the bottom of the mounting box. The circular hole 1 and the circular hole 2 provide guidance for the push rod and the pin respectively, ensuring the accuracy and smoothness of the mechanical linkage.

[0011] The present invention is further provided that the surface of the inspection cover and the back of the mounting box are provided with a sliding groove for the connecting rod to slide. The sliding groove provides a track for the sliding of the connecting rod, preventing the connecting rod from deviating during movement and ensuring the stability of the pin assembly.

[0012] The present invention is further provided that a rubber pad is glued to the top of the pedal by an adhesive, and the surface of the rubber pad is provided with anti-slip texture. The anti-slip texture of the rubber pad increases the friction between the pedal and the sole of the shoe, avoiding operational errors caused by slipping.

[0013] The present invention is further configured such that a limiting groove is formed in the inner wall of the receiving tube, and a slide bar is slidably connected to the inner cavity of the limiting groove. The other side of the slide bar is fixedly connected to the surface of the slide rod. The cooperation between the limiting groove and the slide bar restricts the radial sway of the slide rod, making the movement of the limiting block more stable and improving the reliability of the self-locking function.

[0014] The present invention is further configured such that the inspection cover is fixedly connected to the surface of the mounting box by a countersunk bolt, and the surface of the inspection cover is installed in the inner cavity of the mounting groove by a countersunk bolt. The inspection cover is fixed by double bolts, which not only ensures the sealing of the mounting box, but also facilitates quick disassembly and maintenance of internal components.

[0015] The present invention has the following beneficial effects.

[0016] 1. This utility model, through the linkage design of the limiting component and the latch component, can realize the temporary fixing and automatic closing functions of the fire door. When a person steps on the pedal, the pin of the latch component moves down and inserts into the pre-drilled pin hole in the ground. At this time, spring one pushes the limiting block to move to the top of the receiving plate to fix the pin, keeping the door open and facilitating the quick passage of multiple people. After releasing the pedal, the push rod is squeezed with the foot, and then the pin moves up under the action of spring two to release the limiting. The door closes slowly under the action of gravity. This design solves the problem that traditional floor springs cannot stop the door in the middle, significantly improving the efficiency of personnel passage and the convenience of use.

[0017] 2. This utility model ensures precise matching between the limit block and the pin rod through the elastic reset mechanism of spring one and spring two, avoiding the risk of self-locking failure or accidental locking due to mechanical jamming. At the same time, the slide rod and receiving tube in the mounting box adopt a limit groove and slide bar structure, which enhances the stability of the limit block movement. The anti-slip rubber pad on the pedal surface further improves the safety of operation. In addition, the device is hidden in the mounting box in the corner of the fire door, reducing the wear of exposed parts and accidental human contact, and ensuring the reliability of the fire door in emergency situations. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional diagram of a self-locking floor spring for a fire door.

[0020] Figure 2 This is a side view schematic diagram of a self-locking floor spring for a fire door.

[0021] Figure 3 This is a schematic diagram of the connection structure between the mounting box and the cover plate in a self-locking floor spring for a fire door.

[0022] Figure 4 This is a schematic diagram showing the operation of a self-locking floor spring for a fire door, where the pin is inserted into the ground.

[0023] Figure 5 This is a schematic diagram of the connection structure between the mounting box and the receiving tube in a self-locking floor spring for a fire door.

[0024] Figure 6 This is a three-dimensional schematic diagram of the main body of a fire door in a self-locking floor spring for fire doors.

[0025] Figure 7 This is a schematic diagram of the connection structure between the slider and the limit block in a self-locking floor spring for a fire door.

[0026] In the attached diagram: 1. Fire door body; 101. Mounting groove; 2. Mounting box; 3. Limiting assembly; 31. Slide groove; 32. Slider; 33. Push rod; 34. Limiting block; 35. Slide rod; 36. Receiving tube; 37. Spring 1; 38. Limiting groove; 39. Slide bar; 4. Pin assembly; 41. Spring 2; 42. Pin rod; 43. Receiving plate; 44. Connecting rod; 45. Pedal; 5. Inspection cover plate; 6. Threaded hole 1; 7. Threaded hole 2; 8. Countersunk bolt 1; 9. Countersunk bolt 2; 10. Round hole 1; 11. Round hole 2; 12. Moving groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Example 1

[0029] Please see Figure 1-7 This utility model relates to a self-locking floor spring for fire doors, comprising a fire door body 1. A mounting box 2 is bolted to one corner of the fire door body 1. A limit assembly 3 and a latch assembly 4 are fixedly connected to the inner cavity of the mounting box 2. The limit assembly 3 includes a groove 31 formed on the top side of the inner cavity of the mounting box 2. A slider 32 is slidably connected to the inner cavity of the groove 31. A push rod 33 is fixedly connected to one side of the slider 32. A limit block 34 is fixedly connected to the bottom of the slider 32. A sliding rod 3 is fixedly connected to one side of the limit block 34. 5. A receiving tube 36 is slidably connected to the surface of the slide rod 35. A spring 37 is sleeved on the surface of the receiving tube 36. The two ends of the spring 37 are fixedly connected to the surfaces of the mounting box 2 and the limiting block 34, respectively. The pin assembly 4 includes a spring 41 fixedly connected to one side of the bottom of the inner cavity of the mounting box 2. A pin 42 is provided in the inner cavity of the spring 41. A receiving plate 43 is fixedly connected to the top of the pin 42. A connecting rod 44 is fixedly connected to both the front and back of the receiving plate 43. A pedal 45 is movably connected to the surface of the connecting rod 44 through a pin.

[0030] Specifically: the spring force coefficient of spring 37 is greater than that of spring 41, which enables the device to have a good limiting function in the self-locking state and prevents the pin 42 from moving upward. At the same time, the receiving tube 36 accommodates the slide rod 35, ensuring the stability of the limiting block 34 when it moves left and right and preventing wobbling. The front end of the connecting rod 44 adopts a flat design to support the pedal 45, ensuring smooth up and down movement.

[0031] Example 2

[0032] Please see Figure 1-7Based on Embodiment 1, a mounting groove 101 for fixing the mounting box 2 is provided on both the front and back of one corner of the fire door body 1. An inspection cover 5 is movably connected to the surface of the mounting box 2. Threaded holes 6 are provided on the surface of the mounting groove 101, the surface of the inspection cover 5, and the back of the mounting box 2. Threaded holes 7 are provided on the surfaces of the mounting box 2 and the inspection cover 5. A countersunk bolt 8 is threaded into the inner cavity of threaded hole 6, and a countersunk bolt 9 is threaded into the inner cavity of threaded hole 7. A round hole 10 for passing through a push rod 33 is provided at the top of the outer side of the mounting box 2. A... A second round hole 11 is provided on the side for the pin 42 to pass through. The surface of the inspection cover 5 and the back of the mounting box 2 are provided with a sliding groove 12 for the connecting rod 44 to slide. A rubber pad is glued to the top of the pedal 45 with adhesive, and the surface of the rubber pad is provided with anti-slip texture. A limiting groove 38 is provided on the inner wall of the receiving tube 36. A slide bar 39 is slidably connected to the inner cavity of the limiting groove 38. The other side of the slide bar 39 is fixedly connected to the surface of the slide rod 35. The inspection cover 5 is fixedly connected to the surface of the mounting box 2 by a countersunk bolt 29. The surface of the inspection cover 5 is installed in the inner cavity of the mounting groove 101 by a countersunk bolt 18.

[0033] Specifically: The design of the mounting groove 101 and the inspection cover 5 facilitates the fixing of the mounting box 2 and subsequent maintenance, improving the overall aesthetics and maintainability of the device. Countersunk bolt 1 8 and countersunk bolt 2 9 fix the mounting box 2 and the inspection cover 5 respectively, ensuring structural stability and a flat surface, and preventing bolt protrusion from affecting door closure. Round hole 1 10 and round hole 2 11 provide guides for the push rod 33 and the pin 42 respectively, ensuring the accuracy and smoothness of mechanical linkage. The moving groove 12 provides a track for the sliding of the connecting rod 44, preventing the connecting rod 44 from shifting during movement and ensuring the stability of the pin assembly 4. The anti-slip texture of the rubber pad increases the friction between the pedal 45 and the shoe sole, avoiding operational errors caused by slipping. The cooperation between the limiting groove 38 and the slide bar 39 restricts the radial sway of the slide bar 35, making the movement of the limiting block 34 more stable and improving the reliability of the self-locking function. The inspection cover 5 is fixed by double bolts, which not only ensures the sealing of the mounting box 2, but also facilitates quick disassembly and maintenance of internal components.

[0034] The working principle of this utility model is as follows: When a person steps on the pedal 45, the pin 42 of the latch assembly 4 moves down and inserts into the pre-drilled pin hole in the ground. At this time, the spring 37 pushes the limiting block 34 to move to the top of the receiving plate 43 to fix the pin 42, keeping the door open and facilitating the quick passage of multiple people. After releasing the pedal 45, the push rod 33 is squeezed with the foot, and then the pin 42 moves up under the action of the spring 41 to release the limit, and the door closes slowly under the action of gravity.

[0035] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A self-locking floor spring for fire doors, comprising a fire door body (1), characterized in that: A mounting box (2) is fixedly connected to one corner of the fire door body (1) by bolts. The inner cavity of the mounting box (2) is fixedly connected to a limit assembly (3) and a pin assembly (4). The limiting component (3) includes a slide groove (31) opened on one side of the top of the inner cavity of the mounting box (2). A slider (32) is slidably connected to the inner cavity of the slide groove (31). A push rod (33) is fixedly connected to one side of the slider (32). A limiting block (34) is fixedly connected to the bottom of the slider (32). A slide rod (35) is fixedly connected to one side of the limiting block (34). A receiving tube (36) is slidably connected to the surface of the slide rod (35). A spring (37) is sleeved on the surface of the receiving tube (36). The two ends of the spring (37) are fixedly connected to the surfaces of the mounting box (2) and the limiting block (34) respectively. The pin assembly (4) includes a second spring (41) fixedly connected to one side of the bottom of the inner cavity of the mounting box (2). The inner cavity of the second spring (41) is provided with a pin (42). The top of the pin (42) is fixedly connected to a receiving plate (43). The front and back of the receiving plate (43) are both fixedly connected to a connecting rod (44). The surface of the connecting rod (44) is movably connected to a pedal (45) through a pin.

2. The self-locking floor spring for a fire door according to claim 1, characterized in that: The fire door body (1) has a mounting groove (101) on the front and back of one corner for fixing the mounting box (2), and the surface of the mounting box (2) is movably connected to an inspection cover (5).

3. A self-locking floor spring for fire doors according to claim 2, characterized in that: The surface of the mounting groove (101), the surface of the inspection cover (5), and the back of the mounting box (2) are all provided with threaded holes one (6). The surfaces of the mounting box (2) and the inspection cover (5) are all provided with threaded holes two (7). The inner cavity of the threaded hole one (6) is threaded with countersunk bolt one (8), and the inner cavity of the threaded hole two (7) is threaded with countersunk bolt two (9).

4. A self-locking floor spring for fire doors according to claim 1, characterized in that: The top of the outer side of the mounting box (2) is provided with a circular hole (10) through which the push rod (33) passes, and the bottom side of the mounting box (2) is provided with a circular hole (11) through which the pin (42) passes.

5. A self-locking floor spring for fire doors according to claim 2, characterized in that: The surface of the inspection cover (5) and the back of the mounting box (2) are provided with a sliding groove (12) for the connecting rod (44) to slide.

6. A self-locking floor spring for fire doors according to claim 1, characterized in that: The top of the pedal (45) is glued with a rubber pad, and the surface of the rubber pad is provided with anti-slip texture.

7. A self-locking floor spring for fire doors according to claim 1, characterized in that: The inner wall of the receiving tube (36) is provided with a limiting groove (38), and a slide bar (39) is slidably connected to the inner cavity of the limiting groove (38). The other side of the slide bar (39) is fixedly connected to the surface of the slide rod (35).

8. A self-locking floor spring for fire doors according to claim 3, characterized in that: The inspection cover (5) is fixedly connected to the surface of the mounting box (2) by countersunk bolt two (9), and the surface of the inspection cover (5) is installed in the inner cavity of the mounting groove (101) by countersunk bolt one (8).

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