JPH0192186A - Operating device in pit of elevator - Google Patents

Abstract

PURPOSE: To significantly improve the working efficiency, compared in a conventional work by two persons by connecting a pendant switch to a maintenance switch box provided within a pit, and operating an elevator by operating it. CONSTITUTION: A pendant switch P.SW ordinarily provided on a car C is mounted on the tip of a cable movable several meters, and it is operable on the car C or from a hall side. In a work within the pit, the pendant switch P.SW is detached and connected to a maintenance switch box C.MSB newly provided within the pit or under the car C, and the pendant switch P.SW is operated from the inside of the pit, whereby an elevator can be operated. Thus, since a work regulation or maintenance inspection can be performed within the pit by one worker while operating the elevator, the working efficiency can be significantly improved, compared with the conventional work by two persons.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to operation during maintenance and inspection of elevators, and particularly to operation suitable when maintenance and inspection work is performed by humans.

[Conventional technology]

Previously, adjustment, maintenance and inspection of equipment under the car and in the pit had to be done by two people, both inside and outside the pit.

Note that related devices of this type include, for example,
° Utility Model Application Publication No. 58-19597 is mentioned.

[Problem that the invention attempts to solve]

The above-mentioned conventional technology does not take into consideration the efficiency of construction adjustment and maintenance/inspection work, and there is a problem in that the above-mentioned work requires two people to perform the work.

An object of the present invention is to enable one person to perform construction adjustment work and maintenance inspection work on equipment under the car and in the pit in the pit.

[Means for solving problems]

The above object is achieved by connecting a pendant switch permanently installed on the car to a maintenance switch box newly installed in the pit or under the car.

[Effect]

A pendant switch, which is permanently installed on the car, is attached to the end of a cable that can be moved several meters long.
And it can be operated from the hall side.

When working in the pit, remove this pendant switch.
It can be operated by connecting to the newly installed maintenance switch box inside the pit or under the car and operating the pendant switch from inside the pit.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 shows an elevator hoistway. The elevator hoistway is partitioned by a wall W, and the machine room includes a hoist P and second pulleys S, P, and a car C and counterweights C, W are suspended via wires Wi. Furthermore, a control panel CP for controlling speed, operation, etc. is arranged.

At the bottom of the hoistway, shock absorbers B, C, and B are installed to alleviate collisions between heels and counterweights. In addition, there are limit switches Lt and SW that detect the car position on the lowest floor.
In-pit maintenance switch boxes P and MSB are installed near the level of the - floor. The car has doors C and Dr, a maintenance switch box C1M5B is installed above the car, and hall side doors H and 'Dr are installed at the entrance/exit of the hall. C and MSB on the car are usually equipped with pendant switches p and sw that include the r up and down buttons shown in Figure 2, the door short button DSB to short-circuit the door switch, and the emergency stop switch to stop the elevator. It is connected.

Next, driving in the pit will be explained. In Fig. 1, by stopping the car at an intermediate floor between the - floor and the second floor and turning the normal-maintenance switches N and S in the operation panel in Fig. 3 to the maintenance side, the input buffer X43H to the microcomputer is set to 0FFL. , Normal operation mode disappears 0 Next, open the second floor landing doors H and Dr, climb onto the car, and turn ON as shown in Figure 3.
, when the CAGE switch O9C is turned on, the input buffer
3D is ONL and becomes the out-of-car operation mode. Next, remove the pendant switch p from the car maintenance switch box.
, remove the sw, get off the top of the car, go down into the pit from the landing on the first floor, and remove the maintenance switch box P in the pit.
Pendant switches p and s brought to MSB from the top of the basket
Connect w. Worker M uses the DS in the pendant switch.
By pressing B and upper button U (lower button D), the third
Figure cover”/77XDSB and X0NU (XOND)
is turned ON, and the elevator starts ascending or descending operation at low speed. (The ascending and descending operation circuits are omitted as they are not directly related to the present invention.) If an abnormality occurs during operation, set the normal-emergency stop switches E and S in the pendant switch to the emergency stop side to ensure safety as shown in Figure 3. Confirmation relay 50B is 0FFL The elevator is stopped by the brake. Switch S is a detection contact of various safety devices, and 250B is an output buffer of a microcomputer control device.

Next, interlocking of pendant switches on the car and in the pit will be explained. Driving outside the car is dangerous, so safety must be ensured. In FIG. 3, when the pendant switch is removed, the safety confirmation relay 50B becomes 0FFL/, and the elevator becomes inoperable. The normal-emergency stop switches E and S are shown as two in series for the sake of explanation, but since there is only one pendant switch, there is only one contact point. Normally, p and sw are connected to C and MSB, and a socket with a short circuit (■) is attached to P and MSB. When removing p and sw of C and MSB, remove the socket of P and MSB and connect it to C and MSB to create a short circuit (■). Next, 50B is turned on by connecting p and sw to P and MSB.

According to this embodiment, (1) construction adjustments and maintenance inspections can be made while operating the elevator inside the pit, and the safety of workers inside the pit can also be ensured.

(2) Hard interlocks were established between on-car operation and pit operation, ensuring the safety of pit workers.

(3) Since it is possible to operate inside the pit using an existing pendant switch, it can be easily installed on existing elevators, making maintenance and inspection easier.

〔Effect of the invention〕

According to the present invention, construction adjustment and maintenance/inspection work can be carried out by one worker in the pit while operating the elevator, so that work efficiency can be greatly improved compared to conventional two-person work.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an elevator hoistway, FIG. 2 is a perspective view of a pendant switch, and FIG. 3 is an operating circuit diagram of the pendant switch. B... Car buffer, C... Car, cp... Control panel, C9W... Counterweight, P... Hoisting machine, S
, P...Second pulley, W...Elevator hoistway wall, Wi...Wire. Figure 1

Claims (1)

[Claims] 1. A maintenance switch box is installed on the car,
A detachable cable is connected to the tip of the elevator, and a pendant switch containing switches and buttons necessary for construction adjustment, maintenance and inspection is installed at the tip of the cable, and the elevator can be operated by operating the pendant switch. An in-pit operating device for an elevator, characterized in that the maintenance switch box is provided at the lowest floor level, the pendant switch is connected, and the pendant switch is operated in the pit to operate the elevator. 2. The in-pit operation device for an elevator according to claim 1, wherein the pendant switch is provided under the car.