JP2001146372A - Work device of elevator hoistway - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work device of an elevator hoistway capable of safely performing high lift work including lifting of an accommodation ladder. SOLUTION: In a work device of an elevator hoistway having a footstool 3 capable of inspecting an apparatus 11 arranged in the vicinity of an accommodation ladder 2 erected along a wall surface of an elevator hoistway while an operator 6 gets on the footstool 3, the device comprises a master rope 5 suspended up to the vicinity of a hoistway bottom part 1 from an upper part of at least the accommodation ladder 2, falling preventive metal fittings 8, 8a, 8b, 8c being arranged so as to engage this master rope 5 and checking a downward movement by wedge work and a lifeline 9 having one end installed on this falling preventive metal fitting 8 and the other end is detachably installed on a belt 7 of the operator 6 via a hook 9a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working device for an elevator hoistway, and more particularly to a working device for an elevator hoistway suitable for working at heights in the hoistway.

[0002]

2. Description of the Related Art In a conventional elevator hoistway working device, a ramp is stood upright along an elevator shaft wall and in the vicinity of an entrance, and equipment provided at least at the entrance of the ramp is maintained. A limiter is provided that has a stowable mechanism that can be stored at a position where a member can get on and inspected, and is operated when the step is in a protruding state, so that at least the car can travel only to a position that does not hinder the inspection. Proposed technology was proposed.

[0003]

In the above prior art, work at a high place in a hoistway can be performed easily and safely by providing a ramp and a step platform. It is necessary to hang the hook of the lifeline attached to the belt wrapped around the worker's waist on the platform of the ramp to prevent Is usually performed, but it is a reality that placing a lifeline during raising and lowering of the ramp is not performed because work instructions are given but it is troublesome.

[0004] It is an object of the present invention to provide an elevator hoistway working device capable of safely performing high-place work including raising and lowering of a ramp.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention allows a worker to inspect a ramp which is erected and fixed along a wall surface of an elevator shaft and equipment near the ramp. In a working device for an elevator hoistway provided with a step platform, a master rope hanging down at least from the top of the ramp to the bottom of the hoistway is provided so as to be engaged with the master rope. It has a fall prevention fitting for preventing movement, and a lifeline which has one end attached to the fall prevention fitting and the other end detachably attached to the worker's belt via a hook.

With this configuration, the worker attaches a lifeline via a hook to a belt attached below the ramp at the bottom of the hoistway, and then climbs the ramp to perform a predetermined operation on the platform, and the work is completed. Thereafter, the rider descends the ramp while temporarily releasing the wedge action of the fall prevention fitting by hand, and upon reaching the hoistway bottom, removes the lifeline from the belt. In this way, even if the worker steps down and falls on the ramp or on the platform,
The worker is not seriously injured because the fall prevention fitting stops by the wedge action on the master rope and prevents the fall. Moreover, it is not necessary to perform the trouble of moving up and down while changing the position where the lifeline is hung during the raising and lowering of the ramp.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

FIG. 1 is a perspective view of an elevator hoistway working apparatus according to an embodiment of the present invention, and FIG.
FIG. 3 is an explanatory view showing a high-altitude working mode using an embodiment of the working device of the elevator hoistway according to the present invention.

1 and 2, a step 3 is provided above a ramp 2 erected from a hoistway bottom 1, and a fixture 4 is disposed above the ramp 2.
One end is supported, and the parent rope 5 is suspended near the hoistway bottom 1. Further, a safety belt 7 worn by an operator 6 described below is hung below the ramp 2.

The fall prevention bracket 8 is mounted so as to engage with the master rope 5, and an L bracket 8c is mounted via a shaft 8b provided on an upper portion of a guide 8a. A lifeline is attached to an end of the L bracket 8c. 9 is connected to one end. Here, when a load is applied to the lifeline 9 attached to one of the L brackets 8c of the fall prevention bracket 8, the L bracket 8c rotates via the shaft 8b, and the L bracket 8c is rotated.
The wedge action of the other c pressing the master rope 5 occurs, and the frictional resistance increases, so that the downward movement of the fall prevention fitting 8 is restricted.
Further, when the worker 6 is connected to the worker 6 who has a very heavy load on the lifeline 9 and applies the entire weight to the lifeline 9, the fall of the master rope 5 hanging simultaneously with the rotation of the L bracket 8 c is prevented. Since the metal fitting 8 is at a substantially right angle, the fall of the worker 6 can be reliably prevented.

Next, an example of an operation in which the worker 6 uses the elevator hoistway operation device of the present embodiment will be described.

Now, the brackets 10a-1a are located above the hoistway.
When inspecting the speed governor 11 disposed through the shaft 0c, the worker 6 wears the safety belt 7 at the hoistway bottom 1 and attaches the lifeline 9 to the safety belt 7 via the hook 9a. After climbing the platform 2 and stepping on the platform 3, the speed governor 11 provided near the ramp 2 is inspected as shown in FIG.

Next, when the work is completed and the user descends the ramp 2, the L bracket 8 c of the fall prevention bracket 8 is lowered while holding it by hand so as not to rotate toward the master rope 5, and the life rope is lowered at the hoistway bottom 1. 9 and the safety belt 7 are removed.

According to the present embodiment, at the time of working at a high place, it is possible to reduce injuries caused by the fall of the worker 6 including reciprocation from the hoistway bottom 1 to a high place.

[0015]

According to the present invention, even if the worker steps down and falls on the ramp or on the platform, the fall prevention metal fitting stops on the master rope by the wedge action to prevent the worker from falling. Will not be seriously injured. In addition, there is no need for the troublesome work of moving up and down while changing the position where the lifeline is hung during the raising and lowering of the ramp.

[Brief description of the drawings]

FIG. 1 is a hoistway perspective view showing an embodiment of an elevator hoistway working device according to the present invention.

FIG. 2 is an enlarged perspective view of a portion A shown in FIG.

FIG. 3 is an explanatory view showing a high-altitude working state using an embodiment of the working device of the elevator hoistway of the present invention.

[Explanation of symbols]

 2 Trap 5 Parent rope 7 Safety belt 8 Fall prevention bracket 8a Guide 8b Shaft 8c L bracket 9 Lifeline 9a Hook

Claims (1)

[Claims] 1. An elevator hoistway working device comprising: a ramp standing upright along a wall surface of an elevator hoistway; and a step board on which an operator can ride and inspect equipment near the ramp. A main rope hanging down from the upper part of the hoistway to the bottom of the hoistway at the longest, a fall prevention fitting provided to engage with the main rope, and preventing downward movement by wedge action, and one end attached to the fall prevention fitting. And a lifeline which is detachably attached to the worker's belt via a hook at the other end via a hook.