Emergency stop switch and automatic anti-reversion device of escalator

Abstract

A plurality of switches are arranged at the upper ends of the outer sides of the two ends of the escalator, an inner wheel is installed in a cylindrical groove of a ratchet wheel, and inner teeth of the ratchet wheel are meshed with inclined faces of the top ends of three pawls installed in the inner wheel. An inner wheel is fixed in a key groove formed in a main shaft through a key, a cross rod and a buffer spring are fixed together through a bolt, the lower end of the buffer spring and a touch pressure switch are installed in cylindrical grooves in the upper end and the lower end of a buffer pad respectively, and a contact of the touch pressure switch penetrates through a through hole of the buffer pad and then makes contact with the other end of the buffer spring. According to the device, the operation can be stopped as long as the hand can touch the switch at the upper end of the outer side of the handrail of the escalator in the first time, and meanwhile, the device also has the function of preventing the escalator from suddenly reversing.

Description

technical field [0001] The invention relates to the field of escalators, in particular to an emergency stop switch and an automatic anti-reverse device of an escalator. Background technique [0002] At present, the accidents of the existing escalators basically occur in the area where the stairs go up or down. For example, the escalator suddenly reverses during normal driving, sudden dizziness and high blood pressure, accidental falls or The head, fingers, heels, objects, etc. are caught, etc. Although there is an emergency stop switch, there is no emergency stop switch in the entire up or down area of ​​the operation. The switch is installed at the entrance and exit of the escalator Therefore, it can be said that the emergency stop switch can be pressed in the first time, which can completely avoid casualties. The presently disclosed "escalator anti-reversal device (Chinese Patent No.: 201220578239.3)" has the disadvantage that when a sudden reversal occurs, the pawl will ...

AI Technical Summary

Problems solved by technology

The existing "anti-reversal device for escalators (Chinese Patent No.: 201220578239.3)" has the disadvantage that when a sudden reversal occurs, the pawl will block the ratchet and reverse, because there is no buffer and decompression device between them, Under the instantaneous inertial impact, this head-on impact is easy to damage the pawl, and it only has one pawl to block the ratchet and reverse, and there is also a lack of a device for cutting off the power switch when the pawl blocks the ratchet; "An emergency stop device for escalators or moving walks (China Patent No.: 201520670784.9)", its disadvantage is that because the thin steel cable is pulled too long, it is easy to pull the switch when pulled too tightly, resulting in accidental parking at the same time It is also easy to pull the switch. If it is too loose, it will not be able to pull the switch. At the same time, only one switch is used, and there is no auxiliary switch. No, it's easy to hurt your hands

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