JPH06127860A - Parallel elevator inspecting safety device - Google Patents

Abstract

PURPOSE:To enable inspection work in a pit by one inspector safely at low expense without lowering work efficiency by slowing down an adjacent car to stop once at the floor immediately above the lowest floor in the case of the adjacent car being operated down to the lowest floor during the inspection work of the pit. CONSTITUTION:When a maintenance operation switch SL in the operation board of a car is operated in order to perform the inspection work of various equipments of an A-elevator in a pit 9, a maintenance relay X is excited, and when a stop switch ST is operated, a stop relay Y is excited, and a-contacts Xa, Ya are closed. In this state, a first floor car call button PB1 in the car is pressed, and a car call registration relay 51 is energized and self-held by the closed state of its a-contact 51a, and when an a-contact 51a2 is also closed, a second floor car call registration relay 2 is energized since the a-contacts Xa, Ya are already closed. A car is therefore slowed down to stop once at the second floor at the time of being operated down toward the first floor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for inspecting a side-by-side elevator for ensuring the safety of pit inspection work of the side-by-side elevator.

[0002]

2. Description of the Related Art In an elevator, various equipments and parts installed in a hoistway or a car are inspected and serviced regularly or as needed.

When inspecting and servicing various equipment and parts installed under the car or in the pit, the elevator is located near the middle position between the lowest floor landing position and the lowest floor immediately above floor landing position. It is stopped at the position, and workers enter the pit to inspect and maintain various equipment and parts.

In this case, it is necessary to ensure the safety of the workers in the inspection work in the pits of the side-by-side elevators in which the cars are arranged directly adjacent to each other in the hoistway and there is no partition between them.

In this type of inspection work, a part of the worker's body or equipment may protrude into the adjacent hoistway during the inspection work. It is sufficient if the operation of the adjacent cars can be stopped during the inspection work, but the inspection work may be performed while the adjacent cars are operating in order not to deteriorate the operation service.

Therefore, it is necessary for the worker to carry out the inspection work while always paying attention to the operation of the adjacent cars. In addition, two workers were required to carry out inspection work as a group, and one worker had to notify the other worker that an adjacent car was approaching the pit.

An example of a safety device for inspecting a side-by-side elevator of this type is disclosed in JP-A-63-92588.

[0008]

As described above, in the conventional inspection work, performing the inspection work while always paying attention to the operation state of the adjacent cars not only reduces the efficiency of the inspection work but also reduces the inspection work. It is not easy to ensure safety when concentrated.

Further, when two workers work as a group, the labor cost becomes high, and the work of monitoring the operation state of the adjacent cars causes great mental fatigue of the monitoring workers.

The present invention has been made in view of the present situation of the elevator pit inspection work as described above, and its purpose is to prevent an unexpected accident during the pit inspection work of the parallel elevators and to prevent one worker from doing so. It is an object of the present invention to provide a safety device for inspecting a side-by-side elevator, which can be inspected safely by means of a simple structure and can be manufactured at low cost.

[0011]

In order to achieve the above-mentioned object, according to the present invention, a safety device for inspecting a side-by-side elevator in which a car is arranged directly adjacent to each other in a hoistway is used during inspection work. When a car adjacent to the car descends from the upper floor to the lowermost floor, a stop means is provided for temporarily decelerating and stopping on the floor immediately above the lowermost floor.

[0012]

Since the present invention has the above-mentioned structure, when an adjacent car moves down from the upper floor to the lowermost floor when performing inspection work in the pit, the vehicle is decelerated and stopped immediately above the lowermost floor. Therefore, the worker who is performing the inspection work in the pit can know in advance that the adjacent car will be descending to the lowest floor, and the work can be performed safely.

Further, since the work of monitoring the approach of adjacent cars is not required, the work can be performed by one worker, the cost required for the inspection work can be reduced, and the work efficiency can be prevented from lowering.

[0014]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side view of a side-by-side elevator in which a car 1A and a car 1B are arranged directly adjacent to each other in a hoistway 7. FIG. 2 is a plan view of FIG.

In FIG. 1 and FIG. 2, the worker 8 moves the hoistway 7
In the bottom pit 9, the car 1A was stopped at a position near the middle of the bottom floor landing position and the floor directly above the floor landing position, and various equipment in the pit 9 of the elevator A was inspected. ing. At this time, the inspection lights 2A and 2B provided in the lower portions of the cars 1A and 1B are operated by operating the inspection light switches (not shown) in the respective operation boards 3A and 3B in the cars 1A and 1B. It is lit.

In the above-mentioned situation, when the adjacent car 1B in operation descends from the upper floor to the lowermost floor, the car call buttons 4B in the operation panel 3B in the car 1B are called directly above the lowest floor. By decelerating and stopping the car 1B immediately above the bottom floor, the car 1B does not descend directly from the upper floor to the bottom floor, and the worker 8 operates the car 1B at the bottom floor. Knowing in advance that the vehicle will descend to the pit 9 by running sound, lighting, etc., it is possible to prevent part of the body or equipment from protruding into the adjacent pit 9.

Next, the deceleration stop operation of the floor immediately above the lowest floor during the descending operation of the car 1B adjacent to the car 1A during the above-mentioned inspection work will be described with reference to FIG.

FIG. 3 is a circuit diagram showing a configuration of an embodiment of the present invention, in which SL is a maintenance operation switch of the car 1A,
ST is a stop switch of the car 1A, PB1 to PBH are car call buttons of the car 1B, and 91b to 9Hb are car 1B.
Position detection relays 91 to 9H (not shown).

When the maintenance operation switch SL in the car 1A operation panel 3A is operated to inspect various equipment in the pit 9 of the elevator A, the power supply terminal P, the maintenance operation switch SL, the maintenance relay X, the power supply are supplied. A current flows through the terminal N and the maintenance relay X is energized. Similarly, when the stop switch ST in the car 1A operation panel 3A is operated, P, ST,
Current flows through Y and N, and the stop relay Y is energized. As a result, the a-contact Xa of the maintenance relay X and the stop relay Y,
Ya turns on.

In the above state, the elevator car 1 adjacent to the elevator 1 during inspection of various equipment in the pit 9 of the elevator A
When B is the car call button 4B of the car 1B from the upper floor, and the car call button PB1 of the middle floor is pressed, the car call registration relay 51 is activated and the relay 51 turns on its own a contact 51a. Hold yourself. At this time, the car call registration relay 5
The position detection relay contact 91b connected in series to 1 turns off when the car 1B arrives at the first floor, and has a role of deactivating the car call registration relay 51. Car call registration relay 5
When 1 is energized, the a contact 51a2 is also turned on, and the maintenance relay contact Xa and the stop relay contact Ya are also turned on. Therefore, by energizing the second floor car call registration relay 52 of the car 1B, the car 1B Decelerate and stop on the 2nd floor (the floor directly above the lowest floor). In addition, the car call registration relay 52 on the second floor of the car 1B
71a connected in series to the urging circuit of No. 1 is an a contact of the lowest floor hall call registration relay 71 (not shown), and 91B2 is a b contact of the position detection relay 91 (not shown) of the car 1B. is there.

Therefore, when the car 1B is on the upper floor and the lowest call button PB1 of the car call buttons 4B of the car 1B is operated, or the lowest floor call button HPB1 (not shown). When is operated, the car 1B starts descending toward the lowest floor. At the same time, the bottom floor car call registration relay 51 or the bottom floor hall call registration relay 71 (not shown) is turned on to turn on the a contact 51a2 or 71a2. The registration relay 52 is energized to create a car call circuit immediately above the lowest floor, and decelerates to stop immediately above the lowest floor. When the car 1B reaches the floor immediately above the lowest floor, the position detection relay 92 (not shown) of the car 1B is energized, and the b contact 92
b turns off and deactivates the car call registration relay 52 immediately above the lowest floor. Also, when the car 1B is on the lowest floor, the car 1
Since the B position detection relay 91 (not shown) is energized and the b contact 91b2 is turned off, the car call registration relay 52 of the car 1B is not energized.

In this embodiment, the movement of the car 1B facing the elevator 1A during the inspection work has been described with reference to the drawings, but the movement of the car 1A opposite to the elevator 1B is the same even during the inspection work. The description is omitted.

Further, in the present embodiment, the method of decelerating and stopping on the floor directly above the lowest floor by the method of car call registration on the floor directly above the lowest floor is adopted, but the maintenance relay X and the stop relay Y of the car under inspection are The deceleration circuit may be directly inserted into the deceleration circuit, or the deceleration stop floor may be an arbitrary floor as required.

[0024]

As described in detail above, according to the present invention, when an adjacent car is descending from the upper floor to the lowest floor when performing inspection work in the pit,
Since the vehicle decelerates and stops on the floor immediately above the lowest floor, the worker who is inspecting the pit can know that the adjacent car is approaching the pit, and one person can work safely and at low cost. The inspection work in the pit can be performed without lowering it.

[Brief description of drawings]

FIG. 1 is a side view of a hoistway of a side-by-side elevator according to the present invention.

FIG. 2 is a plan view of a hoistway of side-by-side elevators.

FIG. 3 is a circuit diagram showing a configuration of an exemplary embodiment of the present invention.

[Explanation of symbols]

 1A Elevator Unit A Car 1B Elevator Unit B Car 3A Car 1A Driver Panel 3B Car 1B Driver Panel 4A Driver Panel 3A Car Call Buttons 4B Driver Panel 3B Car Call Buttons 7 Hoistway 8 Worker 9 Pit SL Maintenance Switch ST Stop switch 51-5H Car call registration relay PB1-PBH Car call button 91b-9Hb Position detection relay b contact

Claims (1)

[Claims] 1. A safety device for inspecting side-by-side elevators, in which cars are arranged directly adjacent to each other in a hoistway,
Inspection of a side-by-side elevator characterized by provision of stop means for temporarily decelerating and stopping immediately above the lowest floor when a car adjacent to the car under inspection descends from the upper floor to the lowest floor Safety device.