JPH0622700Y2 - Elevator safety device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an elevator safety device used for in-pit work of an elevator.

[Conventional technology]

Generally, equipment such as a limit switch that stops the car and a buffer that buffers the car if it falls should be installed in the pit that forms the lower part of the hoistway for the car to go up and down. Maintenance personnel may enter the pit for maintenance and inspection. Then, in order to ensure the safety of work in this pit, when the maintenance personnel enter the pit,
First, the limit switch is manually operated to prevent the operation of the car, and the operating state of the limit switch is maintained by a metal fitting or the like.

Further, conventionally, it has been proposed that when the limit switch is arranged at a high position in the pit which is out of reach of a maintenance worker, the maintenance worker in the pit is provided with an operating body for operating the limit switch.

[Problems to be solved by the invention]

By the way, in the above-mentioned conventional technique, the maintenance personnel had to enter the pit and operate the limit switch. Therefore, there is a problem that, if the car accidentally goes down during the operation of entering into the pit of the maintenance staff, a serious accident may occur.

The present invention has been made in view of the above-mentioned circumstances in the prior art. The purpose of the present invention is to maintain a maintenance person or another maintenance person while one maintenance person enters the pit and performs maintenance work. Even if a member accidentally touches the switch lever,
It is an object of the present invention to provide an elevator safety device that is extremely safe without switching the switch and restarting the operation of the car.

[Means for solving problems]

In order to achieve this object, the present invention provides an elevator safety device provided with a switch at the lower part of an elevator hoistway that blocks the operation of a car that goes up and down in the hoistway, and a lamp that lights up when the switch is activated. In the above, a cord is provided in the vicinity of the lowest floor entrance of the hoistway, one end of this cord is connected to the lever of the switch, and a hook is provided at the other end of this cord, and the hook is provided. , The switch is operated by hooking a metal fitting provided near the lowest floor entrance of the hoistway to prevent operation of the car, and by removing the hook from the metal fitting of the switch. The operation is stopped and the operation of the car is restarted.

[Action]

Since the present invention is configured as described above, when the maintenance staff grasps one end of the cord-like body provided near the entrance at the lowest floor entrance and hooks it on the pulling metal, A switch connected to the end is actuated by being pulled through the cord. The operation of the switch blocks the operation of the car. Further, at this time, since the lamp is lit to indicate that the switch is in the operating state, not only can the lamp be confirmed to be lit to be safely put in the pit, but after the work in the pit is completed, the switch It is also possible to reliably perform the return operation. Also, unless you remove the hook from the metal fitting, the switch will not switch,
The operation of the car will not be accidentally restarted.

〔Example〕

Hereinafter, the elevator safety device of the present invention will be described with reference to the drawings.

1 and 2 are explanatory views showing an embodiment of an elevator safety device according to the present invention, and FIG. 1 is a perspective view showing the configuration of essential parts,
FIG. 2 is a vertical sectional view showing the entire structure of the elevator.

In FIG. 2, 1 is a hoistway of an elevator, 2 is a car that hoists within the hoistway 1, 3 is a counterweight that staggers up and down in the hoistway 1 with the car 2, and 4 is a car with one end 2, a main rope connected to the counterweight 3 at the other end, 5 is a machine room formed above the hoistway 1,
A sheave 6 is installed in the machine room 5 and around which the main rope 4 is wound. A hoisting machine (not shown) provided with the sheave 6 is provided.
The sheave 6 is driven by this, and the balance 3 with the car 2 is moved up and down via the main rope 4. 7
Is a guide rail for guiding the car 2, 8 is a pit forming the lower part of the hoistway 1, and in the pit 8, a car basket buffer 9 and a counterweight buffer 10 are installed. 11 is a bracket attached to the lower part of the guide rail 7, 12 is a down-limit switch for the car 2, 13
Is a final limit switch of the car 2. These limit switches 12, 13 are mounted on the bracket 11 and are operated by a cam 14 fixed to the car 2. 15 is the lowest floor, and 16 is the floor door provided on this floor 15.

Next, in FIG. 1, 20 is a switch provided at an appropriate position below the hoistway 1, 21 is a lever provided on the switch 20, and when the lever 21 is pulled, the switch 20 operates to operate the car 2. On the other hand, when the lever 21 is released, the lever 21 returns to stop the operation of the switch 20 and the operation of the car 2 is restarted. 22 is a cord to which one end of the lever 21 is connected, 23 is a hook attached to the other end of the cord 22, 24 is a pipe for guiding the cord 22, 25 is a sill for guiding the floor door 16. , 26 are metal fittings fixed to the sill 25, and the hooks 23 of the cords 22 arranged near the floor door 16 on the lowest floor are hooked on the metal fittings 26 to pull the cords 22. To maintain. A lamp 27 is provided in the vicinity of the switch 20 and is turned on when the switch 20 is activated.

In this embodiment, when the maintenance staff wants to perform maintenance and inspection work in the pit 8, he / she goes to the floor 15 at the bottom floor and opens the floor door 16. Then, the hook 23 in the vicinity of the floor door 16 of the hoistway 1 is grasped and hooked on the pulling metal fitting 26. This pulls the lever 21 through the cord 22, and the switch 21
20 is activated and the operation of car 2 is blocked. At the same time, the lamp 27 lights up, indicating that the switch 20 is in operation. Therefore, the operation of the car 2 can be safely and easily blocked without the maintenance personnel entering the pit 8.

In addition, after the maintenance staff finishes the work in the pit 8, go out from the pit 8 to the lowest floor 15 and then attach the hook 23 to the metal fitting.
By removing it from 26, the operation of the switch 20 is stopped and the operation of the car 2 is restarted. At this time, since the lamp 27 is turned off, the switch 20 can be surely restored by checking the state of the lamp 27.

[Effect of device]

As described above, according to the present invention, while one maintenance person enters the pit and performs maintenance work, the maintenance person or another maintenance person accidentally touches the switch lever. However, since the switch does not switch unless the hook is removed from the metal fitting, the operation of the car does not restart and it is extremely safe.

[Brief description of drawings]

1 and 2 are explanatory views showing an embodiment of an elevator safety device according to the present invention, and FIG. 1 is a perspective view showing the configuration of essential parts,
FIG. 2 is a vertical sectional view showing the entire structure of the elevator. 1 ... hoistway, 2 ... car, 8 ... pit, 16 ... bottom floor door, 20 ... switch, 21 ... lever, 22 ... cord, 23 ... hook, 24 …… Pipes, 26 …… Metal fittings, 27…
…lamp.

Claims (1)

[Scope of utility model registration request] 1. An elevator safety device comprising a switch at a lower part of a hoistway of an elevator, which blocks the operation of a car moving up and down in the hoistway, and a lamp which is turned on when the switch is operated. A cord is provided near the lower floor entrance, one end of the cord is connected to the lever of the switch, and a hook is provided at the other end of the cord, and the hook is connected to the uppermost part of the hoistway. The switch is actuated by hooking it on a metal fitting provided near the entrance on the lower floor, and the operation of the car is stopped by removing the hook from the metal fitting, and the operation of the switch is stopped. An elevator safety device characterized in that it is configured to restart car operation.