Safety landing door of building hoist

Abstract

The invention relates to a safety landing door of a building hoist. The safety landing door comprises a landing door and a door lock, wherein the door lock is arranged on a doorframe of the landing door and plays a role in controlling the opening and closing of the landing door. The safety landing door is characterized in that: the door lock comprises a striking bar capable of moving in a retractable mode, a rotatable bolt and a striking block, wherein the striking block is arranged on a building hoist cage and plays a role in driving the striking bar to retract when the striking block contacts the striking bar; an inclined plane is formed on the striking bar for contacting the bolt and driving the bolt to rotate in an opening direction in a retraction process of the striking process and keeping the bolt at the opening position at the end of the process; a resetting device is arranged on each of the striking bar and the bolt; and when the striking block does not contact the striking bar, the striking bar is in an extending state and the bolt is positioned in a closed position. The structure can be widely applied in building construction sites and has the characteristics of simple structure and realization of intelligent opening and closing.

Description

technical field [0001] The invention belongs to the field of construction machinery, and relates to a door for controlling the entry and exit of the hoistway floor opening of a construction elevator. Background technique [0002] Construction elevators are increasingly used in construction sites, and the doors at the exit of the car and the passageway of the outer scaffolding are called landing doors. At present, most of the complete machine factories that produce elevators in China are not equipped with landing door systems. Most of the landing doors are self-made by the construction unit. The processing is rough and the appearance is not beautiful. More importantly, the landing doors have no electrical interlocking. When the landing door is opened, there is a danger of people or objects falling from a height. [0003] Based on this, a Chinese invention patent with publication number 201102850 "A Landing Door Safety Control System for Construction Lifts" discloses a buildi...

AI Technical Summary

Problems solved by technology

However, almost all of its triggers are electronically controlled, which is prone to failure compared with mechanical control, and the investment cost is high, and the installation and uninstallation work is cumbersome, which cannot well meet the current needs of urban and rural construction in our country.

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