Anti-pinch mechanism of shield gate

Abstract

The invention relates to an anti-pinch mechanism of a shield gate. The anti-pinch mechanism comprises two same anti-pinch assemblies. Each anti-pinch assembly comprises a fixed plate, a fixed shaft and anti-inclination guide wheels. One end of the fixed shaft is vertically fixed to the side surface of the fixed plate and the anti-inclination guide wheels are arranged at the other end in a sleevingmanner and are limited on the fixed shaft. Vertical long slots are formed in each fixed plate, the two anti-pinch assemblies are fixed in a transverse mounting slot of a main beam of a portal crane of the shield gate movably through the long slots, separately, and each anti-inclination guide wheel is close to the lower end of a left shifting fork welding assembly and the lower end of a right shifting fork welding assembly of the shield gate, separately and can support the left shifting fork welding assembly and the right shifting fork welding assembly. In a lead screw transmission portal crane system of a passive locking device of an existing shield gate, the anti-pinch mechanism of the shield gate overcomes defects that an obstacle detection function is difficulty realized in the middleof the existing gate body and an obstacle detection function can be scarcely realized in the lower part of the existing gate body, can realize the obstacle detection function of the gate body smoothlyand is simple in structure and low in production cost.

Description

technical field [0001] The invention relates to a safety component of a screen door, in particular to an anti-pinch mechanism of a screen door. Background technique [0002] With the application of subway screen doors in major cities, it is particularly important to improve the operation quality of screen doors and improve passenger safety. As sliding doors that are opened and closed equally with train vehicle doors, a locking device is provided above each door. After the sliding door is closed, the locking device can prevent the door from being opened by external force; when the sliding door is automatically opened, the locking device can be released automatically; an obstacle detection function is also set, when the sliding door is blocked from closing, the door system senses the existence of an obstacle And release the closing force, the sliding door leaves will automatically move in opposite directions, the system prompts that the door body is blocked when closing, the ...

AI Technical Summary

Problems solved by technology

However, the screw drive door operator system has the following disadvantages: when the sliding door encounters obstacles at the middle and lower ends during the closing process, the door bodies will generate a certain rebound force against each other, and the gap between the middle and lower ends will increase instantaneously, while the upper end gap will shrink. , the whole process is easy to cause the upper end of the door body to fall, which is in the shape of a bell mouth. If encountering obstacles with a small width (such as passenger's umbrella, school bag belt, etc.), it is easier to turn the nut left and right at the upper end of the door body under the rebound force of the middle and lower ends. Falling into the locking slot, resulting in the locking of the door body, making the obstacle detection function invalid, and the obstacle cannot be released. In serious cases, it will cause personal injury

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