CN87216777U

CN87216777U - Automatic buffer back-moving device of doors

Info

Publication number: CN87216777U
Application number: CN 87216777
Authority: CN
Inventors: 张庆
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-12-26
Filing date: 1987-12-26
Publication date: 1988-10-12

Abstract

The utility model relates to an automatic buffer back-moving device of doors, which is used for the automatic reset of various doors. The utility model is characterized in that a combined structure of a compressed spring and an air choke tube is adopted. When the door shuts automatically under the action of the compressed spring, the door simultaneously receives the damping effect of the air choke tube, and closes slowly. The defect that the original door tension spring generates impingement and noise at the time of automatic door closing is overcome. The utility model has the advantages of simple structure, and low cost, and can be popularized.

Description

Automatic buffer back-moving device of doors

The utility model relates to a kind of improved door automatic reset device, particularly buffer door automatic reset device.

Door in the past automatically resets and adopts the door extension spring.It relies on extension spring when opening the door, and leans on the tension force of spring to reach the purpose of closing the door automatically.But there is a very big shortcoming in it, is exactly that impact is big, damages door and doorframe easily, sends bigger impact sound simultaneously, and the people also has a kind of sense of insecurity when inlet/outlet, especially true to old man and children.These all are the reasons that it can not get widespread usage.

The purpose of this utility model is a kind of buffer door automatic reset device of design, overcomes the above-mentioned defective that the extension spring of existing door exists, and can shut gently automatically after door is opened, and does not produce the bump and the sound.

The utility model door automatic reset device realizes that the key of above-mentioned purpose is to have adopted stage clip and air damping pipe composite construction, when door is closed under the stage clip effect automatically, is subjected to the damping action of air damping pipe, slowly shuts.

The utility model and the extension spring of existing door are compared, owing to solved the bump problem when door automatically resets, thus can be used for automatically reseting of various occasion doors.Simultaneously because simple in structure, make easily, with low cost, thereby be particularly suitable for the every family popularization and application.

Concrete structure of the present utility model is provided by following examples and accompanying drawing.

Accompanying drawing is the assembly structure figure of buffer door automatic reset device.

Describe the structure and the operating principle of this device each several part in detail below in conjunction with accompanying drawing.

This device mainly is made up of stage clip 1, air damping tube portion 2.Stage clip 1 can adopt the ordinary steel wire spring, and its end is fixed on the stage clip bearing 1-1.The air damping tube portion comprises: damper tube 2-1, pull bar 2-2, piston 2-3, one way valve 2-4, end cap 2-5, sealing ring 2-6 and adjusting nut 2-7.Wherein one way valve 2-4 is made up of air inlet 2-4-1, one way valve pearl 2-4-2, air intake duct 2-4-3, hold-down nut 2-4-4 and pad 2-4-5.

This end of pull bar is fixed on the door during use, and damper tube is gone up dotted portion among the dististyle 1-2(figure that welds by stage clip bearing 1-1) be fixed on the support 3, and can rotate around axle 3-1.Support 3 is fixed on the doorframe by screw hole 3-2.Support 3 also has an effect to be, maintains a certain distance by making axis hole 3-1 and doorframe, and stage clip is subjected to the amplitude of pull bar compression when guaranteeing to open the door.

The operating principle of this device is: when opening the door, because the pull bar fixed end is fixed from the distance of door-hinge, and the initial length of door resetting means adds the length of upper bracket 3 greater than this distance, stage clip 1 is compressed, one way valve 2-4 is open-minded simultaneously, air enters the damping air chamber by air inlet 2-4-1 and air intake duct 2-4-3, after the people leaves, stage clip 1 promotes pull bar 2-2 resets door, because the air in the air chamber is subjected to the compression of piston 2-3, thrust to stage clip has played damping action, can slowly reset thereby make, and the bump and the sound do not take place.In this course, one way valve pearl 2-4-2 pressurized is closed, air in the damping air chamber slowly releases from the slit between seal washer 2-6 and adjusting nut 2-7 and the pull bar, the speed that air releases can be regulated by adjusting nut 2-6, keeps certain damping pressure to guarantee the air in the damping air chamber.

Claims

1, a kind of buffer door automatic reset device, it is characterized in that: be composited by stage clip 1 and air damping tube portion 2, air damping tube portion 2 is made up of damper tube 2-1, pull bar 2-2, piston 2-3, one way valve 2-4, end cap 2-5, sealing ring 2-6 and adjusting nut 2-7, and one way valve 2-4 is made up of air inlet 2-4-1, one way valve pearl 2-4-2, air intake duct 2-4-3, hold-down nut 2-4-4 and pad 2-4-5.

2, by described automatic reset device of claim 1, it is characterized in that: a support 3 that is used to install this device is arranged, and support 3 is fixed on the doorframe when using.