JPH0826617A - Maintenance operation device of elevator - Google Patents

Abstract

PURPOSE:To provide a maintenance operation device of elevator which can secure the safety of a worker to operate to elevate an elevator car, at the bottom of an elevator shaft. CONSTITUTION:A connecting body 7 provided at the bottom of an elevator car 5, and connected to a control device 3 through a movable cable 6A; an operating unit 9 having a cable 9A with a specific length allowable to connect and disconnect to the connecting body 7; and a contact to which at least either the connecting body 7, the cable 9A, or the operating unit 9 is provided, and closed by a specific load to facilitate the operation by the operating unit 9; are provided in the maintenance operation device of the elevator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a maintenance operation device for an elevator.

[0002]

2. Description of the Related Art When performing maintenance on the bottom of a hoistway called a pit, it is necessary for an operator in the pit to lower the car at the pit, for example, by checking an overpass detection switch provided at the bottom of the car. Yes, as described in Japanese Utility Model Laid-Open No. 60-183773, a connecting body connected to the elevator control device is provided at the bottom of the car, and the operator can connect to this connecting body to raise or lower the car in the pit. There was a maintenance operation device for the elevator.

[0003]

SUMMARY OF THE INVENTION In the above-mentioned prior art, when an operator lowers the car with an operating device in a pit, the attention of the head becomes distracting, and the operator hits the head on the bottom of the car and is injured. There was a problem of an accident.

An object of the present invention is to provide a maintenance operation device for an elevator which can ensure the safety of an operator who moves up and down a car at an elevating bottom.

[0005]

In order to achieve the above object, the present invention is connected to a control device for instructing an elevator operating device provided in a machine room by a moving cable, and is controlled to move up and down in a hoistway. In a maintenance operation device for an elevator having a maintenance operation operation panel that is provided on a car and on which the elevator car is operated to move up and down, the elevator operation device is provided at the bottom of the car and is connected to the control device via the moving cable. A connecting body to be connected, an operating unit having a cable of a predetermined length detachably attached to the connecting body, and at least one of the connecting body, the cable, and the cable are provided, and operation by the operating unit is effective. Is provided with a contact that is closed with a predetermined load.

[0006]

With this structure, the operator is connected to the connector at the bottom of the car through a cable, the operator is pulled to close the contacts, and the car is raised and lowered. The distance between the operating device and the bottom of the car must always be taken into consideration, and even if the car is lowered due to distraction, the tension of the operation device held by the operator decreases and the contacts open and the car Is stopped, the car can be operated at the bottom of the hoistway.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a vertical sectional view of a hoistway and a machine room showing a construction of an embodiment of an elevator maintenance operation apparatus of the present invention. A machine room 2 is provided above the hoistway 1, and the machine room 2 is provided. A control device 3 is installed in the chamber 2. The car 5 is connected to the driving machine 4 via a rope 1, and the driving machine 4 is controlled and driven by the control device 3. The control device 3 and the car 5 are connected by a moving cable 6A, a connecting device 6B, and a cable 6C.

At the bottom of the car 5, a socket 7 which is a connecting body connected to the moving cable 6A is attached.

The worker 8 in the pit 1A attaches to the socket 7 a plug 9B connected to the tip of a cable 9A having a predetermined length, for example, 1.5 meters, which is connected to a portable operating device 9. Then, it is possible to drive and operate the car 5 by using the operation device 9.

Further, as shown in FIGS. 2 and 4, the operating device 9
An emergency stop switch 9C having a contact point 9Ca, an ascending operation button 9D having a contact point 9Da, and a descending operation button 9E having a contact point 9Ea are attached thereto. Further, the terminals A and B of the plug 9B are short-circuited by the short-circuit wire 9F, the terminals C and D are connected to the contact 9Da, the terminals C and E are connected to the contact 9Ea, and the terminals F and G are described later. The contacts 9K and 9Ca are connected in series.

Further, as shown in FIG.
The actuator 9H bonded to the fixing plate 9G of the cable 9A is
The weight of the operating device is, for example, 300 between the upper inner wall of the operating device 9 and the fixing plate 9G, which is fitted into the opening hole 9I in the upper part of the operating device 9.
A spring 9J that turns short at 300 grams or more is provided for a gram, and a fixed contact 9K1 is provided on the upper inner wall of the operating device, and a fixed plate 9G facing the fixed contact 9K1.
The load detection contact 9K including the movable contact 9K2 is provided at the position.

FIG. 5 is a circuit diagram showing a main configuration of the elevator maintenance operation apparatus of this embodiment. A power source terminal P is connected to a terminal F of the plug 9B, and a terminal F and a terminal G of the plug 9B are connected. Is the normally closed contact 10b1 of the pit operation relay 10.
Is connected. An elevator stop switch ES, a safety device switch S, and an elevator emergency stop relay 11 are connected in series between the terminal G of the plug 9B and the power supply terminal N.

A power supply terminal P is connected to the terminal C of the plug 9B, and a normally open contact 11a of the ascending operation relay 12 and the emergency stop relay 11 is provided between the terminal D and the power supply terminal N of the plug 9B.
1 are connected in series. On the other hand, between the terminals C and D of the plug 9B, the normally-closed contact 10b of the pit operation relay 10 is provided.
2. The normally open contact 13a1 of the low speed operation relay 13 and the contact UP1 of the ascending operation button provided on the car are connected in series.

Between the connection point between the normally open contact 13a1 and the ascending operation button UP1 and the terminal E of the plug 9B, the contact DN1 of the descending operation button provided on the car is connected. Connection point between ascending operation relay 12 and normally open contact 11a1 and plug 9
A descending operation relay 14 is connected between terminals E of B.

The relay 1 for low speed operation is provided between the connection point between the normally closed contact 10b2 and the normally open contact 13a1 and the terminal D of the plug 9B.
The normally open contact 15a1 of No. 5 and the ascending operation contact UP2 provided in the car are connected in series. Further, the connection point between the normally open contact 15a1 and the contact UP2 and the terminal E of the plug 9B.
In the meantime, the contact DN2 of the descent operation button provided in the car
Is connected.

The switch OM and the low speed operation relay 13 provided on the car are connected in series between the power supply terminals P and N. Similarly, the switch M and the low speed operation relay 15 provided in the car are connected in series between the power supply terminals P and N.

A power supply terminal P is connected to the terminal A of the plug 9B, and a pit operation relay 10 for operating the car in the pit is connected between the terminal B of the plug 9B and the power supply terminal N.

When the maintenance worker 8 works in the pit, the maintenance worker 8 mounts the plug 9B and the socket 7 of the operation device 9. In that case, the terminal A and the terminal B of the plug 9B are connected by the short-circuit wire 9F, and the power supply terminal P, the short-circuit wire 9F, the pit operation relay 10 and the power supply terminal N form a closed circuit. Therefore, the pit driving relay 10 is energized, and the normally closed contacts 10b1 and 10b2 are opened.

Since the normally closed contact 10b1 is opened, the contacts UP1 and UP2 of the ascending operation buttons on and in the car.
Then, the contacts DN1 and DN2 of the descending operation button cannot operate. Therefore, in this state, even if the ascending operation button or the descending operation button on the car or inside the car is operated by mistake, the ascending operation relay 12 or the descending operation relay 14 will not operate.

Since the plug 9B of the operating device 9 is mounted in the socket 7, the contact 9Da of the ascending operation button 9D is located between the terminals C and D of the plug 9B, and the terminal C of the plug 9B.
The contact 9Ea of the descending operation button 9E is connected between the terminal E and the terminal E. Further, the load detection contact 9K and the contact 9Ca of the emergency stop switch 9C are connected between the terminals F and G of the plug 9B.

Therefore, when the maintenance personnel 8 in the pit operates the ascending operation button 9C or the descending operation button 9D while pulling the operating device 9 downward, the elevator car 5 performs ascending operation or descending operation. . When the maintenance staff 8 in the pit operates the emergency stop switch 9C or stops pulling the operation device 9 downward, the elevator car stops operating.

In this embodiment, the load detecting contact 9K is provided inside the operating device 9, but the same effect can be obtained by providing the load detecting contact 9K on the socket 7 or the cable 9A.

[0024]

According to the present invention, an operator is operated by connecting an operating device via a cable to the connector at the bottom of the car, pulling the operating device to close the contact, and raising and lowering the car. The distance between the car and the bottom of the car must always be taken into consideration, and even if the car is lowered due to distraction, the tension of the operating device held by the operator decreases and the contacts open and the car Since it is stopped, the car can be operated at the bottom of the hoistway.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a hoistway and a machine room showing a configuration of an elevator maintenance operation apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of an operating device used in the maintenance operation device for the elevator according to the embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view showing an internal structure of a main part of the operating device of FIG.

FIG. 4 is a connection diagram showing wiring of a terminal portion of a plug of the operating device in FIG.

FIG. 5 is a circuit diagram of a main part of an embodiment of the present invention.

[Explanation of symbols]

 5 Car basket 7 Socket 9 Operator 9A Cable 9B Plug 9G Fixing plate 9H Actuator 9J Spring 9K Load detection contact

Claims (1)

[Claims] 1. A car, which is connected to a control device for instructing an elevator operating device provided in a machine room by a moving cable and is controlled to move up and down in a hoistway, and a car provided on the car and provided on the car. In a maintenance operation device for an elevator having a maintenance operation operation panel for performing an up-and-down operation, a connector provided on the bottom of the car and connected to the control device via the moving cable, and a predetermined detachable member to the connector. An operating device having a cable of a length, and a contact provided on at least one of the connection body, the cable, and the cable, the contact being closed with a predetermined load that enables the operation of the operating device. Elevator maintenance operation device.