CN202990677U - Automatic door closing device - Google Patents

Abstract

The utility model discloses an automatic door closing device, which comprises a pulley fixed on the door frame, a traction rope and an elastic reset device, the traction rope bypasses the pulley, one end is fixedly connected with the door leaf, and the other end is provided with an elastic reset device. The resetting device includes an extension spring, one end of the extension spring is fixed on the door frame through the door frame fixing seat, and the other end of the extension spring is connected with the traction rope. The utility model is installed between the door frame and the door leaf, and the door leaf is automatically closed after people pass through, which ensures the indoor temperature in cold seasons, and is especially suitable for use in factory workshops, breeding grounds or public places. The utility model has the advantages of simple structure, convenient installation and strong practicability.

Description

An automatic door closing device

technical field

The utility model relates to a device fixed on a door and window for controlling the closing of the door and window, in particular to an automatic door closing device.

Background technique

Existing ordinary doors are connected to the door frame through hinges, and the switch of the door needs to be realized by manpower. Although the automatic door can be opened and closed automatically when people arrive and leave to facilitate people's passage, the cost of the automatic door is relatively high, and its application range is limited. Especially in breeding farms, workers frequently enter and exit the farm in winter, and if they do not pay attention to closing the door in time, the temperature of the farm will drop, which will directly affect the health of the livestock and poultry in the farm, and bring unnecessary troubles to the enterprise.

Utility model content

The purpose of the utility model is to provide an automatic door closing device, which is installed between the door frame and the door leaf. After people pass through, the door leaf will automatically close immediately.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

An automatic door closing device includes a pulley fixed on a door frame, a traction rope and an elastic reset device, the traction rope goes around the pulley, one end is fixedly connected with the door leaf, and the other end is provided with an elastic reset device.

The elastic reset device includes a tension spring, one end of the tension spring is fixed on the door frame through the door frame fixing seat, and the other end of the tension spring is connected with the traction rope.

The beneficial effects of the utility model are:

The utility model is installed between the door frame and the door leaf. After people pass through, the door leaf is automatically closed immediately, and the indoor temperature is guaranteed in cold seasons. It is especially suitable for use in factory workshops, breeding grounds or public places. The utility model has the advantages of simple structure, convenient installation and strong practicability.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Fig. 1 is the reference figure of the use state of the present utility model;

FIG. 2 is an enlarged schematic diagram of a partial structure of FIG. 1 .

In the figure: 1. Automatic door closing device; 2. Door frame; 3. Floor; 4. Door leaf; 5. Wall; 11. Door frame fixing seat; 12. Pulley; 13. Traction rope; 14. Door leaf fixing seat; 15. Iron Nail; 16, extension spring.

Detailed ways

As shown in Figures 1 to 2, an automatic door closing device 1 includes a pulley 12 fixed on the door frame 2, a traction rope 13 and an elastic reset device, the traction rope 13 bypasses the pulley 12, one end is fixedly connected with the door leaf 4, and the other end Equipped with an elastic reset device.

The elastic resetting device includes an extension spring 16, one end of the extension spring 16 is fixed on the door frame 2 through the door frame fixing seat 11, and the other end of the extension spring 16 is connected with the traction rope 13.

Preferably, a door leaf fixing seat 14 is provided on the door leaf 4 to facilitate the connection and fixation of the traction rope 13 .

Pulley 12 is fixed on the door frame 2 by iron nail 15.

For reference, the positional relationship of the floor 3, the wall body 5, the door frame 2 and the door leaf 4 and the installation position of the automatic door closing device 1 are shown in FIG. 1 .

The working principle and method of use of the automatic door closing device 1 are as follows: when a person opens the door, due to the external force, the end of the traction rope 13 fixed on the door leaf moves towards the door leaf, driving the tension spring 16 to stretch; 16 restitution, can drive traction rope 13 to be fixed on an end of door leaf and move towards door frame holder 11 direction, and door leaf 4 closes automatically in the process along with extension spring 16 restitution.

The original idea of this device is to use the gravity of the object and the pulley to complete the automatic closing of the door, but when the gravity is used, the movement of the object is too long, resulting in an uncompact structure, which is not convenient for actual installation and use, so it is changed to use the elastic force of the tension spring , which not only can play the same role, but also has a compact structure, which is more conducive to installation.

What is disclosed above is only the specific embodiment of this patent, but this patent is not limited thereto. For those of ordinary skill in the art, under the premise of not departing from the principle of the utility model, the deformations made should be regarded as belonging to this patent. Protection scope of utility models.

Claims (2)

1. door engine, it is characterized in that: comprise the pulley (12), pull rope (13) and the elasticity reset device that are fixed on doorframe (2), pull rope (13) is walked around pulley (12), one end is fixedly connected with door leaf (4), and the other end is provided with elasticity reset device.

2. a kind of door engine according to claim 1, it is characterized in that: described elasticity reset device comprises an extension spring (16), extension spring (16) one ends are fixed on doorframe (2) by doorframe holder (11), and the other end of extension spring (16) is connected with pull rope (13).

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