CN201857191U

CN201857191U - Short circuit preventing system for elevator door lock

Info

Publication number: CN201857191U
Application number: CN2010205172105U
Authority: CN
Inventors: 余金洪
Original assignee: GUANGDONG WINONE ELEVATOR CO Ltd
Current assignee: Winone Elevator Co Ltd
Priority date: 2010-09-01
Filing date: 2010-09-01
Publication date: 2011-06-08
Anticipated expiration: 2020-09-01

Abstract

The utility model discloses a short circuit preventing system for an elevator door lock, comprising a series loop 1 formed by a car door lock SW1 and landing door locks SW 2-SW 5 at each floor, wherein the head end and the tail end of the series loop 1 are respectively provided with a connecting point A and a connecting point B. The short circuit preventing system for the elevator door lock also comprises a short circuit relay 21, a special short circuit pin 22 and an overhaul loop 6 provided with a common terminal 7, wherein the special short circuit pin 22 is provided with four contact points, a series loop 2 is formed by two contact points and the short circuit relay 21 and connected in parallel with the series loop 1 through the connecting point A and the connecting point B; a series loop 3 is formed by the other two contact points of the special short circuit pin 22 and the short circuit relay 21 and is supplied with power through a direct-current power supply; and the common terminal 7 is electrically connected with the normally closed contact of the short circuit relay 21. The short circuit preventing system for the elevator door lock has simple, safe and reliable structure and can ensure the security of elevator passengers and maintainers, thus being widely applicable to various elevators.

Description

Door lock of elevator is prevented the short circuit system

Technical field

The utility model belongs to the elevator field, relates to the door lock of elevator system, specifically, relates to the anti-short circuit system of door lock of elevator.

Background technology

Elevator brings the various whiles easily to people, a lot of hidden danger that also lie dormant, and wherein door-locking system relevant (ladder for example opens the door away) is all followed in the generation of most problems.Therefore; elevator door has crucial effect in the safe operation of elevator; it is as the fender guard of a kind of fall arrest and shearing; the normal operation of elevator depends on effectively closing of layer door; and under normal conditions; the means that checking layer door effectively closed are gate, door loop, the Room to be together in series deliver to control loop as a signal and detect mostly, with one of this condition of moving as necessity (see figure 1).But in the elevator reparing working process, sometimes need the short circuit loop of the door lock, as the point of connection A among direct short circuit Fig. 1, point of connection B 2 points, but after work is finished, since the carelessness do not pull down shorting stub or since unforeseen circumstances cause the door lock short circuit, elevator is moved under the situation of opening the door, then very likely cause falling and shearing of maintainer.

At present, the part elevator has adopted door lock contact tension sampling input media on the market, but still the generation that can not stop above-mentioned situation fully, promptly when the short circuit door lock, still can cause the elevator operation, to return this step of flat bed the most dangerous for elevator when particularly elevator entered inspecting state and recovers normally to move again, and causes the injury to the maintainer especially easily.All there is such potential safety hazard in the loop of the door lock of comprehensive all elevator company's elevators, and passenger and maintainer's personal safety is all had threat.

Summary of the invention

Weak point at existing door lock control loop, the special anti-short circuit system of door lock of elevator that proposes of the utility model, it makes elevator in the short circuit door lock, elevator changes inspecting state by force over to, prevent the maintainer having overhauled that the back recovers on sedan-chair top that the elevator(lift) machine room door lock shorting stub of normal back is not removed elevator fly start and the maintainer is produced the danger of shearing.

Door lock of elevator is prevented the short circuit system, comprise the series loop 1 that the door lock SW2-Room, the Room door lock SW5 by gate lock SW1 and each layer forms, the two ends of described series loop 1 have two point of connection of point of connection A, point of connection B respectively, also comprise maintenance loop 6, maintenance loop 6 is provided with common port 7, it also comprises short circuit relay 21, special-purpose short circuit pin 22, special-purpose short circuit pin 22 has 4 contacts, wherein 2 contacts and short circuit relay 21 form series loops 2, and series loop 2 is by point of connection A, B and series loop 1 parallel connection; Other 2 contacts of special-purpose short circuit pin 22 and short circuit relay 21 form series loop 3, and series loop 3 is by direct supply 4 power supplies; The normally closed contact of common port 7 and short circuit relay 21 is electrically connected.

For whether show elevator door intuitively locks short circuit, the two ends connect in parallel door lock short circuit indicator lamp 5 of short circuit relay 21.

According to the electrical property difference that circuit is touched the concrete vigour part of piece, the voltage of direct supply 4 is 15V---30V.

Principle of work of the present utility model is: when needs short circuit door lock carries out maintenance activity, only need plug special-purpose short circuit pin 22 just can realize short circuit, when special-purpose short circuit pin 22 short circuits, short circuit relay 21, door lock short circuit indicator lamp 5 will be lighted simultaneously, the normally closed contact of short circuit relay 21 will disconnect, and promptly disconnect maintenance loop 6, the elevator forced inspecting state that enters.

Outstanding effect of the present utility model is: (1) can ensure the safety to passenger and maintainer.Because above-mentioned setting, during short circuit pin 22 short circuits of the present utility model, the elevator forced inspecting state that enters is stopped elevator and is moved under the situation of opening the door, and ensures passenger and maintainer's safety; (2) simple in structure, reliable and stable.Used electronic element kind of the utility model and quantity are few, simple in structure, all can install the utility model technique device additional on the elevator of any kind of, and operation that can be reliable and stable.

Because above-mentioned outstanding effect, the utility model is widely used in all kinds of elevators.

Description of drawings

Fig. 1 is the structure principle chart of prior art door lock;

Structure principle chart when Fig. 2 is the utility model door lock short circuit;

Fig. 3 is the structure principle chart of the utility model door lock short circuit indicator lamp 5;

Fig. 4 is the structure principle chart that maintenance loop 6 is electrically connected with short circuit relay 21 in the utility model.

The specific embodiment

Describe in further detail below in conjunction with accompanying drawing and to the utility model.

As shown in Figure 2, door lock of elevator is prevented the short circuit system, comprise the series loop 1 that the door lock SW2-Room, the Room door lock SW5 by gate lock SW1 and each layer forms, the two ends of described series loop 1 have two point of connection of point of connection A, point of connection B respectively, it also comprises short circuit relay 21, special-purpose short circuit pin 22, special-purpose short circuit pin 22 has 4 contacts, and wherein 2 contacts and short circuit relay 21 form series loops 2, and series loop 2 is by point of connection A, point of connection B and series loop 1 parallel connection.

As shown in Figure 3, other 2 contacts of special-purpose short circuit pin 22 and short circuit relay 21 form series loop 3, and series loop 3 is by direct supply 4 power supplies, and power line voltage can be made as 24V.For whether show elevator door intuitively locks short circuit, the two ends connect in parallel door lock short circuit indicator lamp 5 of short circuit relay 21.

As shown in Figure 4, the utility model also comprises maintenance loop 6, and maintenance loop 6 is provided with common port 7, and the normally closed contact of common port 7 and short circuit relay 21 is electrically connected.

Comprehensive above-mentioned 3 accompanying drawings, working process of the present utility model is: when the maintainer carries out maintenance activity to elevator, only need plug special-purpose short circuit pin 22 just can realize the door lock short circuit, when special-purpose short circuit pin 22 short circuits, short circuit relay 21, door lock short circuit indicator lamp 5 will be lighted simultaneously, show the short circuit state of door lock this moment.Simultaneously, the normally closed contact of short circuit relay 21 will disconnect, and promptly disconnect maintenance loop 6, the elevator forced inspecting state that enters.

Claims

1. door lock of elevator is prevented the short circuit system, comprise the series loop (1) that the door lock SW2-Room, the Room door lock SW5 by gate lock SW1 and each layer forms, the two ends of described series loop (1) have point of connection A respectively, two point of connection of point of connection B, also comprise maintenance loop (6), described maintenance loop (6) is provided with common port (7), it is characterized in that: also comprise short circuit relay (21), special-purpose short circuit pin (22), described special-purpose short circuit pin (22) has 4 contacts, wherein 2 contacts and the described short circuit relay (21) of described special-purpose short circuit pin (22) form series loop (2), and described series loop (2) is by described point of connection A, point of connection B and described series loop (1) parallel connection; Other 2 contacts of described special-purpose short circuit pin (22) and described short circuit relay (21) form series loop (3), and described series loop (3) is powered by direct supply (4); The normally closed contact of described common port (7) and described short circuit relay (21) is electrically connected.

2. door lock of elevator according to claim 1 is prevented the short circuit system, it is characterized in that: the two ends connect in parallel door lock short circuit indicator lamps (5) of described short circuit relay (21).

3. door lock of elevator according to claim 1 is prevented the short circuit system, it is characterized in that: the voltage of described direct supply (4) is 15V-30V.