Torsion spring door closer

Abstract

A torsion spring door closer includes a door panel and a door frame, as well as a shaft and a pressure rod. One end of the pressure rod is fixedly connected to the shaft, and shaft seats are respectively mounted at both ends of the shaft. The shaft seats are fixedly installed on the door frame, and a torsion spring is sleeved on the shaft, with both ends of the torsion spring connected to the shaft seats and the shaft, respectively. This invention addresses the problems of existing door closers being bulky, having limited installation positions at the top of the door panel, and easily causing deformation of fire doors.

Description

Technical Field

[0001] The utility model relates to a torsion spring door closer. Background Art

[0002] Fire doors need to be installed in public corridors and stairways of retaining wall office buildings, apartments, and residences. Fire doors need to use door closers to keep them in a "normally closed" state. Due to the large size of existing door closers, some fire doors are not able to open sufficiently after installation. Moreover, ordinary door closers can only be installed on the top of the fire door, which will cause the fire door to deform after being opened and closed for a long time. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a torsion spring door closer for solving the problem that the existing door closer is large in size, the installation position is limited to the top of the door panel, and the fire door is easily deformed.

[0004] In order to solve the above problems, the utility model provides

[0005] A torsion spring door closer comprises a door panel and a door frame, and also comprises an axle rod and a pressure rod. One end of the pressure rod is fixedly connected to the axle rod, and axle seats are respectively installed at both ends of the axle rod. The axle seat is fixedly installed on the door frame, and a torsion spring is arranged outside the axle rod. The two ends of the torsion spring are respectively connected to the axle seat and the axle rod.

[0006] A support is fixedly installed on the door panel, a guide hole is opened on the support, and one end of the pressure rod is inserted into the guide hole.

[0007] It also includes a deceleration mechanism, which includes an end cover and a spring sleeved on the shaft, a limit plate fixedly connected to the shaft seat, and a guide column fixedly connected to the shaft. The top cover of the end cover is an inclined surface, and the side of the end cover is provided with a flat surface. The spring pushes the top cover of the end cover to rest against the guide column, and the side of the end cover rests against the limit plate.

[0008] The beneficial effects of the utility model are:

[0009] 1. After using this patent, you don’t need to worry about the size of special fire door switches being insufficient;

[0010] 2. It is easy to install and can be fixed directly on the door frame with screws;

[0011] 3. It will not squeeze the fire door or damage the fire door itself;

[0012] 4. No need to overhaul the equipment, once installed, it is done once and for all;

[0013] 5. It can be installed at any position on the fire door frame, and it is most suitable to be installed in the middle of the fire door. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings:

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0016] In the figure: axle seat 1, pressure rod 2, door panel 3, support 4, guide column 5, end cover 6, spring 7, limit plate 8, axle rod 9, torsion spring 10, door frame 11. DETAILED DESCRIPTION

[0017] like Figure 1 As shown, a torsion spring door closer includes a door panel 3 and a door frame 11, and also includes a shaft rod 9 and a pressure rod 2. One end of the pressure rod 2 is fixedly connected to the shaft rod 9, and shaft seats 1 are respectively installed at both ends of the shaft rod 9. The shaft seat 1 is fixedly installed on the door frame 11 by countersunk screws. A torsion spring 10 is arranged on the outer sleeve of the shaft rod 9, and the two ends of the torsion spring 10 are respectively connected to the shaft seat 1 and the shaft rod 9.

[0018] The door closer can be installed in the middle of the door frame 11. When the door is opened, the door panel 3 drives the torsion spring 10 to be twisted through the pressure rod 2. After the door panel 3 is released, the torsion spring 10 drives the door panel 3 to close by elastic force.

[0019] A support 4 is fixedly mounted on the door panel 3, and a guide hole is opened on the support 4. One end of the pressure rod 2 is inserted into the guide hole. When the door panel 3 is opened or closed, the pressure rod 2 moves in the guide hole. This structure can prevent the pressure rod 2 from rubbing against the door panel 3, thereby preventing the door panel 3 from being scratched.

[0020] It also includes a deceleration mechanism, which includes an end cover 6 and a spring 7 sleeved on the shaft rod 9, a limit plate 8 fixedly connected to the shaft seat 1, and a guide column fixedly connected to the shaft rod 9. The top cover of the end cover 6 is an inclined surface, and the side of the end cover 6 is provided with a flat surface. The spring 7 pushes the top cover of the end cover 6 to rest against the guide column, and the side of the end cover 6 rests on the limit plate 8. Since the side of the end cover 6 is a plane and rests on the limit plate 8, the end cover 6 can only move axially on the shaft rod 9.

[0021] The working principle of the speed reduction mechanism is as follows: when closing the door, the guide column 5 driven by the rotating shaft rod 9 moves from the lower position of the top cover opening of the end cover 6 to the higher position, thereby driving the end cover 6 downward, forcing the spring 7 to compress, and the more the door panel 3 is closed, the more the spring 7 is compressed, and the greater the resistance applied to the guide column, which reduces the closing speed of the door panel 3, thereby reducing the noise when closing the door, and preventing the door panel 3 and the door lock from being damaged due to excessive closing force.

[0022] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A torsion spring door closer, comprising a door panel (3) and a door frame (11), characterized in that: The door frame further comprises a shaft rod (9) and a pressure rod (2), one end of the pressure rod (2) being fixedly connected to the shaft rod (9), shaft seats (1) being respectively mounted at both ends of the shaft rod (9), the shaft seat (1) being fixedly mounted on a door frame (11), a torsion spring (10) being disposed on the shaft rod (9), and two ends of the torsion spring (10) being respectively connected to the shaft seat (1) and the shaft rod (9).

2. A torsion spring door closer according to claim 1, characterized in that: A support (4) is fixedly mounted on the door panel (3), a guide hole is provided on the support (4), and one end of the pressure rod (2) is inserted into the guide hole.

3. A torsion spring door closer according to claim 1 or 2, characterized in that: The invention also comprises a deceleration mechanism, which comprises an end cover (6) and a spring (7) which are sleeved on the shaft (9), a limit plate (8) which is fixedly connected to the shaft seat (1), and a guide column (5) which is fixedly connected to the shaft (9); the top cover of the end cover (6) is an inclined surface, and the side of the end cover (6) is provided with a flat surface; the spring (7) pushes the top cover of the end cover (6) to abut against the guide column (5), and the side of the end cover (6) abuts against the limit plate (8).

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