JPS5874951A - Sheave for driving - Google Patents

Abstract

PURPOSE:To prevent a lining material laid on a sheave from slipping, by attaching the lining material to the sheave so as to cause it to be filled up in a through hole made on the circumference of a rime of the sheave. CONSTITUTION:Holes 13 each of which is arranged to pierce or half-pierce in the direction of a rotary shaft S, the side face of grooves 11G provided on the circumference of a rim 11 of a sheave 5, while elastic organic matter is injected and bonded in the grooves 11G and the holes 13, and on this circumferential surface, a lining 12 forming a rope groove 12G is attached tight enough. Because of the strength of said lining material filled up in the holes 13 on the side face of the groove 11G, even when the lining 12 is peeled off, the slippage of the lining material 12 is obviated and, what is more, stable driving force can be secured in this way.

Description

[Detailed Description of the Invention] The present invention relates to a driving sheave for winding and pulling a rope,
In particular, the present invention relates to a drive sheave suitable for an elevator drive sheave.

For example, as shown in FIG. 1, in an elevator, a passenger car 1 and a counterweight 2 are suspended via a main rope 3, and the main rope is wound around a sheave 5.6 installed in a side leakage chamber to drive a motor 10. By doing so, the seat lever 1 and the counterbalance type holder 2 are raised and lowered. Reference numerals 7 and 8 are sheaves provided on the rider and the counterweight side, respectively; 4 is a counterbalance rope that connects the rider and the lower pipe of the counterweight; at the lowest part thereof, there is a sheave provided to provide a predetermined tension; A sheave 9 is wrapped around it.

In this way, a large number of sheaves are used in an elevator, but among these, the sheave 5 connected to the motor 10 is a driving sheave for raising and lowering the seats 1, and the other sheaves simply guide the rope. This is a guide sheave for

In order to apply sufficient driving force to the main rope 3 by the driving sheave 5, consideration is given to prevent slippage between the main rope 3 and the driving sheave 5.

For this reason, conventionally, as shown in FIG.
A lining 12 made of an elastic organic material such as polyurethane rubber is attached to the main rope 3 in the rope groove 12G.
Wrap it around and φ. Even if this lining 12 is detached from the rim 11 due to an unexpected accident such as fire or breakage, and the main rope 3 is directly wound around the rim 11, the main rope 3 can be sufficiently driven. A suitable groove 11G is provided on the outer circumferential surface of the rim 11, and the lining 12 is attached to the groove 11G by adhesive or the like.

However, when an elevator is operated for a long time, the mounting surface of the lining 12 peels off or deteriorates due to excessive torque applied during emergency braking, chemical changes, etc., and the groove 11G of the sheave 5 and the lining 12 become separated. The disadvantage was that the elevators were prone to slipping, making it impossible for the elevator to operate normally.

SUMMARY OF THE INVENTION An object of the present invention is to provide a driving sheep that can maintain stable driving force without causing the lining to slip even if the lining installation performance deteriorates.

The invention! The feature is that a half-through hole is provided on the side of the groove on the outer periphery of the sheave rim, and this hole is filled with lining material to firmly attach the lining to the sheave groove. At the point.

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

A hole 13 penetrating or semi-penetrating in the direction of the rotational axis S is provided on the side surface of the groove 11G provided on the outer periphery of the rim 11 of the sheave 5. An elastic organic substance is injected and bonded into the groove 11G and the hole 13, and this outer periphery is Lining 1 with rope grooves 12G formed on the surface
Make sure to firmly attach it to 21.

As a result, even if the lining 12 peels off, the strength of the lining material filled in the hole 13 provided on the side surface of the groove 11G prevents the lining 12 from slipping.
Stable driving force can be obtained.

As described above, a penetrating or semi-penetrating hole is provided in the side surface of the groove provided on the outer periphery of the sheave rim, and the lining in which the rope groove is formed is attached by filling this Omukai (also known as Omukai) with 2-inning material. Therefore, stable driving force can be maintained.

It goes without saying that the drive sheave can also be applied to the guide sheave.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing the structure of an elevator, FIG. 2 is a partial sectional view of a conventional driving sheave, and FIG. 3 is a sectional view of the driving sheave of the present invention. 5... Sheave, 11... Rim, lIG... Groove, 1
2... Lining, 12G... Rope groove, 13...
・Hole, S... times, -χA- th day

Claims (1)

[Claims] 1. A sheave consisting of a rim supported on a rotating shaft and a lining made of an elastic organic material and having a rope groove installed in a groove provided on the outer periphery of the rim and formed concentrically with the rotating shaft. A driving device characterized in that a through or semi-through hole is provided in the side surface of the groove provided on the outer periphery of the rim, the hole is formed so as to be filled with the elastic organic material, and the lining is attached. Seeb.