JPH025663B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for replacing an elevator main rope.

[Background of the invention]

Generally, an elevator has a main rope that is a wire rope, and one end of the main rope is connected to a car, and the other end is connected to a counterweight. This main rope is hung on a sheave in the machine room, so that by driving the sheave with a motor, the car can be raised or lowered via the main rope. By the way, since this main rope is used as described above, it wears out or the strands break and reach the end of its lifespan, in which case it is necessary to replace the main rope.

A conventional method for replacing the main rope will be explained with reference to FIGS. 3 to 6.

To replace the main rope, first, as shown in FIG. 3, the car 10 is stopped at the landing on the top floor, and the counterweight 23 is thereby positioned at the bottom.
The balance weight 23 has a receiving member 2 placed at the bottom thereof.
4, and the upper frame 6 of the car 10 is lifted by a chain block or the like, thereby removing the tension of the main rope. After that, connect the old main rope to the rope stop 18 on the car side and the rope stop 2 on the counterweight side.
Cut and remove each from 2.

A new main rope 1 is wound around a drum 2 placed on the floor 9 of a car 10, and this drum 2 is supported by a drum support 21 via a shaft 3. In this state, as shown in FIGS. 5 and 6, the car 10
Open the rescue exit cover 12 provided on the ceiling 11 of the rescue exit, lead out one end of the main rope 1 from this rescue exit,
A rope stop 22 on the balance weight side is connected to the sheave 19 and deflection wheel 20 of the hoisting machine installed in the machine room.
Connect its leading end to the . Since the car 10 is located at the landing 15 on the top floor, and the counterweight 23 is located at the bottom, at the beginning of this work, the main rope 1 is taken out from the rescue exit and sent to the sheave 19 and deflection wheel 20. It is easy, but as this work progresses, the fourth
As shown in the figure, the main rope 1 is longer and heavier on the counterweight side than on the car side. Due to this imbalance, the drum 2 is pulled upwards by a strong force and comes off the drum receiver 21, damaging the side panels and floor 9 of the car 10. Also, workers who are in the vicinity of the drum 2 and are sending out the main rope 1 There was a risk of harm to the person.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for replacing a main rope that can be performed safely and efficiently when replacing the main rope.

[Summary of the invention]

In order to prevent the drum from being lifted due to an imbalance in the weight of the main rope sent out from the drum, the present invention fixes a support at the entrance/exit of the landing, and uses this fixed support to prevent the drum from moving upward. It is characterized by preventing

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

When replacing the main rope, as in the conventional case, the car 10 is positioned at the landing on the top floor, the counterweight is positioned at the bottom, and the balance weight is maintained in its state by the receiving member. Lift the car 10 using a chain block, etc.
This takes the tension off the old main rope.

What differs from the conventional case is the method of supporting the drum 2 around which the new main rope is wound, and this will be explained with reference to FIGS. 1 and 2.

Figure 1 is a front view of the top floor landing, with 10 cars.
The entrance/exit to is made up of a three-sided frame 14 and a floor 15. A support body 4 having a length adjustment screw 4a is arranged between the upper frame of the three-way frame 14 and the floor surface 15, and the support body 4 whose axial length is increased by the length adjustment screw 4a.
is fixed by pressing its both ends between the upper frame of the three-sided frame 14 and the floor surface 15. The drum 2 is rotatably supported at the bottom of the pair of supports 4.
A braking device 5 is provided on the drum 2 as necessary to control the rotation of the drum 2.

Since the drum 2 is thus held at the entrance/exit portion via the support 4, the drum 2 will not move even if an upward force is applied to the drum 2.
Moreover, in order to hold the drum 2, the three-sided frame 14
Since existing structures such as floor surface 15 are used,
The installation work of the drum 2 is simple and efficient.

One end of the new main rope 1 is sent out from the supported drum 2 as shown in FIG. Connect to the rope stop 22 of. After that, the other end of the main rope is connected to the rope stop 18 of the car 10, and the main rope 1
The replacement work has been completed.

In the above embodiment, the support body 4 is fixed between the upper frame of the three-way frame 14 and the floor surface 15, but between the horizontal frame of the three-way frame 14 or between the support metal fitting 25 attached to the suspension device of the landing door and the floor surface. It may be fixed between the surfaces 15, and after all,
The support body 4 may be fixed using the entrance/exit portion of the landing. Alternatively, the drum 2 may be rotatably supported on a drum receiver, and only upward movement may be prevented by the support 4.

〔Effect of the invention〕

As explained above, the present invention has a support fixed to the entrance/exit part of a landing, rotatably provided with a drum that is prevented from moving upward by the support, and a new main rope is sent out from this drum. As a result, even if there is an imbalance in the length from the sheave to the car side and the counterweight side during main rope replacement work, the drum will not be lifted upwards.
Work can be done safely and efficiently without damaging nearby areas. Furthermore, since the entrance/exit part of the landing is used for fixing the support, there is no need for special processing to support the drum, and the work is simple.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional side view of the vicinity of the landing showing a replacement method according to an embodiment of the present invention, FIG. 2 is a front view of FIG. 1, and FIGS. 3 and 4 are views of an elevator showing a conventional replacement method. 5 is a partially sectional front view showing the main part of FIG. 3, and FIG. 6 is a side view of FIG. 5. 1... Main rope, 2... Drum, 4... Support, 10... Car, 14... Three-sided frame, 15...
Floor.

Claims (1)

[Claims] 1. In a method for replacing an elevator main rope, the old main rope is replaced with a new main rope by sending out a new main rope wound around a drum while supporting the car and counterweight located at the top floor landing. A support is fixed to the entrance/exit of the landing on the top floor, and the support prevents upward movement of the drum around which the new main rope is wound, and in this state, the new main rope is sent out from the drum. A method for replacing a main rope for an elevator, characterized in that: