Half-height emergency door 90 degree opening state keeping device
A technology of opening state and holding device, which is applied in the direction of building fastening devices, wing leaf fastening devices, anti-war damage, etc., can solve the problem of reducing the opening degree, achieve simple structure, reduce changes in opening degree, and operate simple effect
Active Publication Date: 2009-07-08
FANGDA INTELLIGENT INNOVATION TECH CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to solve the technical problem that the opening degree of the emergency door is reduced or closed due to wind pressure, small force extrusion, and impact, and propose a position holding device that assists the emergency door to maintain a certain angle open state
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[0020] figure 1 , figure 2 The basic structure of a preferred embodiment of the present invention is shown, a half-height emergency door 90 ° open state maintenance device, including a door frame 1 and an emergency door 2 hinged on the door frame 1, the door frame 1 is composed of a hollow square column, The emergency door 2 is provided with at least one arc-shaped shrapnel 3 , and the arc-shaped shrapnel 3 is vertically arranged on the side wall of the hinged end of the emergency door 2 . The arc-shaped shrapnel 3 is provided with a protrusion 4, and the protrusion 4 is a ball pin 4 with a spherical top. The door frame 1 is provided with a wedge-shaped piece 5 that can squeeze the protrusion 4, and the right side of the wedge-shaped piece 5 is The door frame 1 is provided with a through hole for inserting the arc-shaped shrapnel 3 .
[0021] like Figure 4 As shown, an upper slope and a lower slope 51, 52 are respectively provided on the left and right sides of the wedge-...
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A half-height emergency door 90° open state maintaining device, including a door frame and an emergency door hinged on the door frame, the emergency door is provided with at least one arc-shaped shrapnel, the arc-shaped shrapnel is provided with protrusions, and the door frame is provided with Wedges with extrudable protrusions. An upper slope and a lower slope are respectively arranged on the left and right sides of the wedge-shaped piece, and the protrusion is a ball pin with a spherical top. Compared with the prior art, when the emergency door is opened at 90°, an external force greater than the elastic force of the arc-shaped shrapnel must be applied to push the emergency door so that the ball pin slides on the inclined surface of the wedge-shaped piece to complete the support of the upper and lower arc-shaped shrapnel. Only after the opening process can the emergency door be closed, which avoids the closing of the emergency door due to wind pressure, slight extrusion, and impact. At the same time, the invention has the characteristics of simple structure, reliability and durability, and simple operation.
Description
technical field [0001] The invention relates to a positioning device, in particular to a position maintaining device for an emergency door in an open state. Background technique [0002] The half-height emergency door is a kind of safety door in subway and other stations. The emergency door is opened for the timely evacuation of the passengers on the train. It is required that after the door body is opened to 90°, it is only subject to a certain wind pressure when no force is applied to it to close it. It can be kept in the 90° open state. If the emergency door reduces the opening angle or closes automatically under the action of wind pressure, small force extrusion and impact, it will have a certain impact on the evacuation of passengers. At the same time, the purpose of the emergency door determines that the door should not be controlled or positioned by a mechanical device with a complex structure, in order to prevent a certain part of the mechanical device from being dam...
Claims
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IPC IPC(8): E05C17/46E05C17/08E06B5/10
Inventor 郭俊义
Owner FANGDA INTELLIGENT INNOVATION TECH CO LTD