A combined heavy-duty fireproof door through-core hinge device
By designing a return spring and rotary damper in the fire door, combined with a heavy load-bearing base, the problem of high impact force when the traditional fire door is automatically closed is solved, and the automatic, uniform and slow closing of the fire door is achieved, extending the service life and improving safety.
Patent Information
- Application Number
- CN202421385888.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-18
AI Technical Summary
Traditional fire doors generate a large impact when they are automatically closed, resulting in wear, damage, shorten service life and increase maintenance costs.
A combined heavy-duty fire door mandrel hinge device is designed to achieve uniform and slow closing of the fire door by setting up a return spring and rotary damper, reducing impact force, and providing stable support through the heavy-duty load-bearing base.
The automatic door closing function of fire doors is realized, saving manpower and improving convenience; avoiding impact and damage through slow closing, extending service life, and improving safety and stability.
Smart Images
Figure CN222716686U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fire door hinges, in particular to a combined heavy-duty fire door core shaft hinge device. Background Art
[0002] In the field of construction, fire doors are one of the important facilities to ensure the safety of buildings. With the continuous development of construction technology and the increasing requirements for safety performance, higher requirements are also placed on the performance of fire doors and related accessories.
[0003] Traditional fire doors are often designed with simple mechanical structures to achieve automatic closing, which results in the fire doors usually closing very quickly in actual use. Rapidly closing fire doors will generate a large impact force, which will not only easily cause serious wear and damage to the door frame, the door body itself and the surrounding connecting parts, shortening the service life of the fire door, but also increasing the cost of maintenance and replacement. Utility Model Content
[0004] The utility model aims to provide a combined heavy-duty fireproof door through-core hinge device to solve the problems raised in the background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution, which includes an upper hinge piece arranged on one side of the top of the fire door, the upper hinge piece is movably arranged on a rotating shaft, the rotating shaft is arranged on a through pipe, the through pipe is arranged on the side wall of the door frame, and a lower hinge piece is arranged on the same side of the bottom of the fire door, the lower hinge piece is movably arranged on a hinge shaft core, a section of the hinge shaft core located above the lower hinge piece is movably arranged in the through pipe, a section of the hinge shaft core located below the lower hinge piece is movably inserted in a heavy-duty load-bearing base, the heavy-duty load-bearing base is buried in the ground, a pair of return springs are arranged on the outside of the hinge shaft core, a rotation damper is arranged on the top of the hinge shaft core, and the rotation damper is arranged on the inner wall of the through pipe.
[0006] As a preferred embodiment of the present invention, one end of the two return springs is arranged on the hinge shaft core, and the other end thereof is arranged on the inner wall of the through pipe.
[0007] As a preferred embodiment of the present invention, the hinge shaft core is connected to the rotating shaft of the rotary damper.
[0008] Compared with the prior art, the above technical solution of the utility model has the following beneficial technical effects:
[0009] 1. The utility model provides a reset spring, which is tightened when the fire door is opened, and uses its elastic force to cause the hinge axis to rotate after being released, thereby realizing the automatic closing function of the fire door, saving manpower and improving the convenience of use.
[0010] 2. The utility model sets a rotary damper to limit the rotation speed of the hinge shaft core, so that the fire door can be closed evenly and slowly, avoiding the impact and damage caused by fast closing, thereby enhancing the service life of the fire door and improving the safety and stability of the closing process.
[0011] 3. The utility model provides a heavy-duty load-bearing base and buries it in the ground, thereby providing a stable support for the hinge axis, being able to bear the weight of the fire door and ensuring the stability and safety of the fire door during use. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the structure of the utility model installed on a fire door;
[0013] Figure 2 It is a schematic diagram of the overall structure of the utility model.
[0014] Figure numerals: fire door 1, through pipe 2, rotating shaft 20, upper hinge piece 3, lower hinge piece 4, hinge shaft core 5, heavy-duty load-bearing base 6, return spring 7, rotary damper 8. DETAILED DESCRIPTION
[0015] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.
[0016] like Figure 1-Figure 2 As shown, the utility model proposes a combined heavy-duty fire door core hinge device, including an upper hinge piece 3 arranged on one side of the top of the fire door 1, the upper hinge piece 3 is movably arranged on the rotating shaft 20, and the rotating shaft 20 is installed on the through pipe 2, and the through pipe 2 is fixedly arranged on the side wall of the door frame, and a lower hinge piece 4 is arranged on the same side of the bottom of the fire door 1, and the lower hinge piece 4 is movably installed on the hinge shaft core 5, wherein a section of the hinge shaft core 5 located above the lower hinge piece 4 is movably arranged in the through pipe 2, and is located A section of the hinge shaft core 5 below the lower hinge piece 4 is movably inserted in a heavy-duty load-bearing base 6, and the heavy-duty load-bearing base 6 is buried in the ground. A pair of return springs 7 are arranged on the outside of the hinge shaft core 5, and one end of the two return springs 7 is fixed on the hinge shaft core 5, and the other end is fixed on the inner wall of the through tube 2. In addition, a rotation damper 8 is arranged on the top of the hinge shaft core 5, and the rotation damper 8 is arranged on the inner wall of the through tube 2, and the top of the hinge shaft core 5 is connected to the rotating shaft 20 of the rotation damper 8.
[0017] The heavy-duty hardware model of this device is JG-MJL-8, which can be adapted to heavy-duty fireproof doors.
[0018] When someone pushes to open the fire door 1, the lower hinge piece 4 will drive the hinge shaft core 5 to rotate, thereby causing the two internal reset springs 7 to begin to tighten; and when the person releases the fire door 1, the hinge shaft core 5 will rotate under the elastic force of the two reset springs 7, and drive the lower hinge piece 4 to make the fire door 1 automatically close. However, during the rotation of the hinge shaft core 5, it will be restricted by the rotation damper 8, thereby slowing down its rotation speed, and finally achieving a uniform automatic closing state.
[0019] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.
Claims
1. A combined heavy-duty fire door through-core hinge device, comprising an upper hinge plate (3) arranged on one side of the top of the fire door (1), characterized in that: The upper hinge piece (3) is movably arranged on a rotating shaft (20), the rotating shaft (20) is arranged on a through pipe (2), the through pipe (2) is arranged on a side wall of a door frame, a lower hinge piece (4) is arranged on the same side of the bottom of the fire door (1), the lower hinge piece (4) is movably arranged on a hinge shaft core (5), a section of the hinge shaft core (5) located above the lower hinge piece (4) is movably arranged in the through pipe (2), a section of the hinge shaft core (5) located below the lower hinge piece (4) is movably inserted in a heavy-duty load-bearing base (6), the heavy-duty load-bearing base (6) is buried in the ground, a pair of return springs (7) are arranged on the outer side of the hinge shaft core (5), a rotation damper (8) is arranged on the top of the hinge shaft core (5), and the rotation damper (8) is arranged on the inner wall of the through pipe (2).
2. A combined heavy-duty fireproof door through-core hinge device according to claim 1, characterized in that: One end of the two return springs (7) is arranged on the hinge shaft core (5), and the other end thereof is arranged on the inner wall of the through pipe (2).
3. A combined heavy-duty fireproof door through-core hinge device according to claim 2, characterized in that: The hinge shaft core (5) is connected to the rotating shaft (20) of the rotating damper (8).