JPH0130757B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevator sheave, and more particularly, to an elevator sheave in which a shock absorber such as a rubber ring can be easily inserted into a traction sheave.

Conventionally, in elevator traction machines, for example, a cushioning material such as a polyurethane rubber ring is inserted into the traction sheave, and problems arise when polyurethane rubber is directly cast into the traction sheave. However, when inserting a shock absorber such as a casting ring that has the same dimensions as the groove on the traction sheave side, the polyurethane rubber ring and traction A gap may occur between the sheave and the sheave groove, and the sheave may not be properly tightened.

Therefore, when the main wire rope meshes, it will be further deformed, and the buffer rubber ring will receive an uneven load from the sheave and the main wire rope, resulting in significant drawbacks such as stress concentration on the buffer rubber ring and accelerated wear phenomena and fatigue. It was hot.

In order to prevent such drawbacks, the present invention provides an elevator sheave in which the traction sheave groove is made smaller than the angle of the contact portion of the shock absorber to the sheave groove so that the shock absorber fits into the groove. The purpose is to

The present invention will be explained below based on the illustrated embodiments.

FIG. 1 is a schematic diagram of an elevator using the present invention.

In FIG. 1, a traction sheave 2 is pivotally attached to the output shaft side of a traction machine 1, and a deflection sheave 3 is attached to the main wire rope 4.
is wrapped, lowered into the hoistway, and a car 5 and a counterweight 6 are attached to each end. A control panel (not shown) provided in the machine room 7 drives and controls the traction machine 1 to drive the elevator car 5 up and down.

During such operation, the main wire rope 4 and the traction sheave 2 always maintain traction so as not to slip.

FIG. 2 is a detailed view of the traction sheave 2 of the traction machine 1, and shows the sheave groove 7 in the sheave 2.
A buffer body 8 such as a polyurethane rubber ring shown in FIG. 3 is inserted into this.

A V-shaped groove having an angle of θ ₁ is formed in the sheave groove 7 of the traction sheave 2 . On the other hand, the buffer body 8
is formed in a V-shape with an angle of θ as shown in FIG. Then, the angle θ ₁ of the sheave groove and the angle θ of the contact part of the buffer body 8 to the sheave groove 7
The relationship between θ 1 and θ is set so that θ ₁ <θ.

In other words, the present invention provides a sheave groove 7 provided in the circumferential direction on the outer periphery of the sheave 2, a buffer body 8 provided in the sheave groove 7, a rope 4 wound around the rope 4 through the buffer body 8, and a buffer body 8 provided in the sheave groove 7. In an elevator sheave for raising and lowering a car 5, the sheave groove 7 is
The angle of the sheave groove 7 is set at θ ₁ degree, and the angle formed by the side of the buffer body 8 that fits into the sheave groove 7 is set at θ degree, and the angle between the sheave groove 7 and the buffer body 8 is θ ₁ degree. The sheave for an elevator is characterized in that the sheave is provided in a relationship such that θ ₁ <θ and is configured to fit together with elastic force.

That is, in FIG. 2, the buffer body 8 is pressed at an angle of θ ₁ , and the left and right ends of the V-shape are attached to the sheave groove 7 with a constant repulsive force due to the elasticity of the rubber. It has an acting force that always brings it into close contact with the traction sheave 2, and no gaps are generated.

Therefore, even if the main wire rope 4 is engaged with this under load, there will be no place where the traction sheave 2 and the buffer body 8 will come apart, and of course there will be no slippage between the traction sheave 2 and the buffer body 8. ,
Even when a large load is applied to the main wire rope 4, the contact state is maintained well.

As described above, the present invention provides an elevator sheave that has stable performance when the angle of the sheave groove 7 is θ ₁ and the angle of the buffer body 8 such as a polyurethane rubber ring is θ, and the relationship between them is θ ₁ <θ. can.

Although the above description has been made regarding a traction sheave, it goes without saying that this may also be applied to a deflection sheave.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an elevator using the present invention;
FIG. 2 is a detailed sectional view of the traction sheave shown in FIG. 1, FIG. 3 is a side view of FIG. 2, and FIG. 4 is a sectional view of the shock absorber according to the present invention. 2... Traction sheave, 3... Deflection sheave, 4... Main wire rope, 7... Sheave groove, 8
...Buffer body, 9...Traction sheave groove.

Claims (1)

[Claims] 1. A sheave groove provided in the circumferential direction on the outer periphery of the sheave;
In an elevator sheave in which a buffer body is provided in the sheave groove, a rope is wound around the buffer body, and a car is raised and lowered by the rope, the sheave groove is provided in a V-shape at an angle of θ ₁ degree, and one side The angle formed by the side of the buffer body that fits into the sheave groove is set to θ degrees, and the θ ₁ degree of the sheave groove and the θ degree of the buffer body are set in a relationship such that θ ₁ <θ. A sheave for an elevator, characterized in that the sheave is configured to fit together.