CN2154849Y

CN2154849Y - Contactless safety door of working lift

Info

Publication number: CN2154849Y
Application number: CN 92245074
Authority: CN
Inventors: 徐磊; 孙建国
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-12-21
Filing date: 1992-12-21
Publication date: 1994-02-02
Anticipated expiration: 2002-12-21

Abstract

The utility model relates to a contactless safety door of a working lift. The utility model is characterized in that one side of a fender door is provided with a locking block which is composed of a notched bump which is connected with a lever with a hook by a spring; a lifting cage is provided with an impact block, and the inner part of the impact block is provided with a micro switch. The utility model has the advantages that the door of the working lift can not touch the lifting cage if the door is not opened, when the lifting cage does not reach the floor, the locking block can effectively lock the door; when the lifting cage reach the floor, the door can be opened, and meanwhile, the main power of the working lift is cut off; the electromechanical interlock can be achieved. The utility model can be used for various construction lifts, and the operation is safe.

Description

Contactless safety door of working lift

The utility model relates to a kind of contactless safety landing door of building hoist, belongs to the vehicle for construction field.

At present, in the construction trade in the employed building hoist, because it is bigger to reach the electromechanical interlock difficulty, the building hoist setting accuracy is poor, and therefore, present employed layer door is not the cost height, maintenance is complicated, be exactly out of reach electromechanical interlock purpose, for example, used lock dog of safety landing door of building hoist commonly used and cage collision block are in operation often to bump against easily and damage.

The purpose of this utility model need overcome the existing used lock dog of safety landing door of building hoist and the cage collision block normal shortcoming that bumps against that is in operation, and provides a kind of lock dog in service and collision block discontiguous contactless safety landing door of building hoist.

The technical solution of the utility model is as follows, by lock dog, collision block, micro-switch and hurdle door are formed contactless safety landing door of building hoist, door one side in hurdle is provided with a lock dog, it is connected to form by the lever of a notched projection by spring and buckle, be equipped with a collision block on the cage, one micro-switch is set in the collision block, when cage does not arrive layer, projection makes the lever tail end rely on lock dog, cage collision block in service does not collide the shortcoming that lock dog has overcome prior art, cage does not arrive layer, and the lever top hook of lock dog embeds the projection breach can pin the hurdle door effectively, when cage arrives layer, collision block makes the lever hook leave the projection breach, the hurdle door can be opened, and meanwhile, the lever tail end touches micro-switch on the collision block, cut off the working power of cage, reaching electromechanical interlock like this and can make the elevator safe operation, can be to stir or move up and down door up and down according to the form of door, and projection can be cam-like or be strip.

The utility model embodiment is described further in conjunction with the accompanying drawings.

When Fig. 1 moved for cage, projection was the lock dog working state figure of cam-like;

Fig. 2 is that cage does not arrive layer, lock dog working state figure when the cam-like projection pins the hurdle door;

Fig. 3 arrives layer, the lock dog working state figure of built-in cam shape projection when elevator is lived by electric lock for cage;

When Fig. 4 moved for cage, projection was the lock dog working state figure of strip-like-shaped;

Fig. 5 arrives layer for cage, and the strip projection pins the lock dog constitution diagram of moving door;

Fig. 6 arrives layer for cage, when elevator is lived by electric lock, and the lock dog working state figure of built-in strip projection;

Fig. 7 embodiment 1 contactless safety landing door of building hoist structure principle chart;

Fig. 8 embodiment 2 contactless safety landing door of building hoist structure principle charts;

Fig. 9 is contactless safety landing door of building hoist electrical schematic diagram.

Embodiment 1:

By shown in Figure 1, be provided with a micro-switch 1 in the collision block 2, projection is a notched cam 5, its lever 3 by spring 4 and buckle connects to form lock dog 7, cage is in service, during not to the layer that needs, hurdle door 6 is under the deadweight effect, cam notch is turned over up, under cam 5 effects, the tail end of lever 3 inwardly leans on, and is not just colliding the tail end of lever at operating cage, if during this layer of cage no show, as shown in Figure 2, if there is external force to stir hurdle door 6, when still translating into certain altitude, lever 3 front end hooks embed cam 5 breach and pin door 6, reach security purpose like this, by shown in Figure 3, when cage arrives this layer, collision block 2 makes lever 3 tripping cams 5 on the cage, this moment hurdle door 6 can on turn over, meanwhile, lever 3 tail ends touch the micro-switch 1 on the collision block 2, by shown in Figure 9, the one group of normal opened contact and the master control relay normally closed contact of this micro-switch are in series, and one when micro-switch action, normal opened contact closure, control circuit cuts off the working power of cage, reach electromechanical interlock, present embodiment 1 structure principle chart is by shown in Figure 7,2 for collision block it is loaded on the cage, 7 is lock dog, and it and hurdle door 6 are loaded on the support 8.

Embodiment 2: Fig. 4, Fig. 5, Fig. 6 represent that respectively lock dog is built-in with the strip-like-shaped projection, the cage of door when moving up and down is in operation, live to be waited the mode of operation of lock dog 7 under three kinds of situations to layer and elevator by electric lock, different with embodiment 1 have 2 points: 1, the projection 5 of composition lock dog 7 is strip-like-shaped.2, door 6 can move up and down.The principle of work of embodiment 2 and embodiment 1 are basic identical, when cage is in operation, door 6 does not move, and leans in the tail end of lever 3, and cage is in service, collision block does not collide lever 3 tail ends, if cage time is not executed figure to layer and is opened the door, but when being moved upwards up to certain distance, the breach of the front end hook embedding strip-like-shaped projection 5 of lever 3, pinning hurdle door 6 continues to open, reach safety and pin purpose, when cage ran to layer, collision block 2 made lever 3 throw off strip-like-shaped projections 5 on the cage, at this moment, move on the door ability and open, meanwhile, lever 3 tail ends touch the micro-switch 1 in the collision block, cut off the working power of elevator, reach electromechanical interlock.Fig. 8 is the structure principle chart of present embodiment, and the lock dog 7 that projection, lever and spring are formed is loaded on the side of support 8 with last movably door 6.

The utility model advantage is that the layer door installed of lift or a layer hurdle do not contact cage when not opening, during less than layer, if the people opens layer door or layer hurdle for looking on the bright side of things, can cause when dangerous, lever top hook in the lock dog cooperates with projection and can effectively pin layer door and open, and during to layer, opens at door and cuts off simultaneously the lift main power source and reach electromechanical interlock, the utility model can be used on the various building hoists, makes its safe and reliable operation.

Claims

1, a kind of contactless safety landing door of forming by lock dog, collision block, micro-switch and hurdle door, it is characterized in that door one side in hurdle is provided with a lock dog, it is connected to form by the lever of a notched projection by spring and buckle, be equipped with a collision block on the cage, a micro-switch is set in the collision block.

2, contactless safety landing door of building hoist according to claim 1 is characterized in that, the projection in the lock dog is a cam.

3, contactless safety landing door of building hoist according to claim 1 is characterized in that, the projection in the lock dog is strip-like-shaped.