JPS61295983A - Elevator device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an elevator apparatus, and particularly relates to an apparatus in which a rope is wound around a rope groove of a drive sheave.

[Background of the invention]

In recent years, resource conservation and cost reduction have been advocated in the elevator industry, and along with this, efforts have been made to reduce the weight of elevator cars. However, this poses a problem in that slips between the sheave and the rope are likely to occur. Therefore, it is necessary to improve traction ability.

Here, the traction capacity is the rope tension ratio T1/T at the slip limit between the sheave and the rope, where T1: rope tension on one side of the rope wound around the sheave T2: rope tension on one side of the rope wound around the sheave Rope tension on the other side of the hung rope μ: Apparent coefficient of friction between the sheave and the rope θ: Wrapping angle of the rope with respect to the sheave e: Base of natural logarithm Conventional rope wrapping for single-wrap type traction elevator equipment For example, the method is -1 Utility Model Kaiho 58-1
It is shown in Japanese Patent No. 17476. This is shown in Figure 11.
1 is a sheave that has a rope groove (not shown) at the outer station, is supported by a sheave shaft 7, and is driven by a hoist 6; 2 is a deflection wheel; 3 is a rope wound around the sheave 1 and the deflection wheel 2; ,
A weight 4 is placed on one side of the rope 3, and a counterweight 5 is placed on the other side.
are connected.

The seat 4 and counterweight 5 are maintained at appropriate intervals by the sheave 1 and deflection wheel 2. Then, the rope 3 is driven by the sheave 1, and the car 4 and the counterweight 5 are raised and lowered.

In such a system, the rope wrapping angle θ with respect to the sheave 1 is
is 180° or less. Note that when the deflection wheel 2 is not installed, the rope wrapping angle θ is 180'.

In other words, in the conventional rope winding method as shown in Fig. 11, the rope winding angle θ is less than 180°, which makes it impossible to meet the demand for improved traction ability, and it is not possible to meet the demand for improved traction ability. It was not possible to reduce the weight of the vehicle and its own weight.

Therefore, a method to improve traction ability was developed in the 5th century.
8-117476. This is shown in FIG. That is, the rope 3 connects the sheave 1 and the deflection wheel 2a,
2b, and the rope is wound around the sheave 1 at an angle θ of 180° or more.

As is clear from the first set, this improves the traction ability of the sheave 1 with respect to the rope 3.

In FIG. 12, the rope 3 is wrapped around the sheave 1 and the diverter wheel 2 so that they intersect, so there is a risk that the rope 3 will come into contact at the intersection. This contact generates vibration and noise, which significantly reduces the ride comfort of the elevator.

In other words, the structure of both ropes is as follows. In the rope winding system of the conventional elevator equipment shown in FIG. 11, the winding entrance point for winding the rope 3 onto the sheave 1 and the winding exit point 0 are formed in the same plane in a cross section perpendicular to the sheave axis 7 direction. be done. On the other hand, in the conventional rope winding method shown in FIG. 12, unlike the previous one in FIG. O is not formed in the same plane in the cross section at right angles to the sheave axis 7 direction, and has a structure in which the rope 3 is wound around in a screw shape.In other words, as shown in FIG. 13, the rope 3 in FIG. The winding inlet point and outlet point O to sheave 1 are connected to sheave shaft 7.
When rotated around , and shown on the same plane of the cross section in the direction of the sheave axis 7, the winding entrance point and winding exit point 0 are different, the rain point and 0 are shifted by a distance C8, and the rope 3 is 1 in the driving direction (perpendicular to the plane of the paper), and slides in the direction of the sheave shaft 7 perpendicular to this direction.

[Purpose of the invention]

The purpose of the present invention is to prevent the rope from crossing between the sheave and the diverting car.
Alternatively, the ropes intersect on the sheave, and the ropes are wound in a threaded manner where the entry point and exit point of the sheave do not form the same plane in a cross section perpendicular to the sheave axis, and they come into contact at the intersection. The object of the present invention is to provide an elevator device that prevents vibration and noise from occurring due to contact.

[Summary of the invention]

The key point of the present invention is that the sheave axial component of the rope driving force generated by the forming angle of the rope strands or wires is applied to the winding of the rope in the rope groove so that the direction is right-handed or left-handed. Therefore, the setting is made to match the direction of retreat.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 10.

In FIG. 1, a sheave 1 has an outer rope groove (not shown), is supported by a sheave shaft 7, and is driven by a hoist 6;
3 is a rope with a car 4 on one side and a counterweight 5 on the other; 2a and 2b are deflection wheels that hold the car 4 and the counterweight 5 at appropriate intervals; and the rope 3 is placed in a rope groove.
The winding inlet point and the winding outlet O are wound in a screw shape that is not formed on the same plane in a cross section perpendicular to the sheave axis 7 direction (in the figure, as an example, the rope 3 is wound around the circumference of the sheave). ), and furthermore.

The rope 3 is wound around the deflection wheels 2a and 2b, and the traction capacity of the sheave 1 drives the rope 3 to raise and lower the seat 4 and the counterweight 5.

On the rope groove, as shown in FIG. 2, if the winding entrance point and winding exit point ○ of the rope 3 in FIG. 1 are rotated and shown on the same plane as in FIG. Rope 3a on the winding entry point Q side, rope 3b on the winding exit point Q side
, when the distance between the winding entrance point I and the winding exit point 0 is C1, the rope 3a is sent on the rope groove 8 in the driving direction (perpendicular to the plane of the paper), The point is moved completely over a distance of 08 to the position of the rope 3b.

At this time, in order to prevent the ropes 3 from coming into contact with each other at the intersections, the ropes 3 are moved over the rope groove 8 onto the sheave shaft 7.
It is difficult to move in any direction. As will be explained based on FIGS. 3 to 9, the type of twist and winding direction of the rope 3 are set.

That is, as shown in FIG. 3, there are two types of rope 3: normal twist and rung twist, and there are Z twist and S twist depending on the twist direction of the rope 3, respectively. In normal twisting, the twisting direction of the rope 3 and the twisting direction of the strand 1° are opposite. Therefore, with respect to the length direction of the rope 3, the strands 11 form an angle α in substantially the same direction, and the strands 10 form a two-shape or an S-shape. On the other hand, in the case of rung twisting, the twisting direction of the rope 3 and the twisting direction of the strand 10 are the same.

Therefore, with respect to the length direction of the rope 3, the struts 1, the ends 10, and the strands 11 each form angles α and β in a two-shape or S-shape, and the angles α and β are in the same direction. becomes. Due to the formation angles α and β of these strands 10 and wires 11, the length direction of the rope 3, that is, the rope 3
A force component is generated in the direction of the sheave shaft 7 perpendicular to the driving direction of the sheave. Namely.

As shown in FIG. 4, in the case of Z-twisting, the strands 10 are at a two-character angle α, or the strands 11 are at a two-character angle β, so the driving force F of the rope 3 of the sheave 1 is ,l
is the force F in the same direction as the strand 10 or the wire 11
Il, which is decomposed into a vertical force Fv. A component force FYL of the vertical force F in the direction of the sheave shaft 7 becomes a force that moves the rope 3 to the left of the sheave shaft 7, which is perpendicular to the driving direction of the rope 3. Similarly, in the case of S twist, as shown in FIG. 5, the strand 10 is at an S-shaped angle α, or the strand 11 is at an S-shaped angle β, so the component of the driving force F8 of the rope 3 is F. becomes a force that moves the rope 3 in the right direction of the sheave shaft 7. Force of these ropes 3 in the direction of the sheave shaft 7 F YL# FYl
Combining l with the direction of winding the rope 3 into the rope groove 8,
As the rope 3 moves in the direction of the sheave shaft 7 on the rope groove 8,
<This is shown in Figures 6 to 9.

Z? ! In the case of the rope 3 with L twist, follow the direction of the right-hand thread as shown in Figures 6 and 7, and in the case of the rope 3 with S twist, follow the direction of the left-hand thread as shown in Figures 8 and 9. The rope is wound around the rope groove 8 in the direction shown in FIG. In other words, rope 3
A component of the driving force F of the rope 3 in the direction of the sheave shaft 7 acts in the opposite direction to the direction in which the rope should slide on the rope groove 8.

In addition, at this time, the groove bottom 8' of the rope groove 8 shown in FIG. must be formed flat. However, if the groove bottom 8' is made flat, the following problems occur.

That is, when a rope under tension is wound around the flat rope groove 7, the contact area with the rope groove 8 is small, so the rope 3 is pressed onto the rope groove 8 by a large contact surface pressure. As a result, the cross section of the rope 3 changes from a circular shape to an elliptical shape. Therefore, each time the rope 3 passes through the rope groove 8, the cross section of the rope 3 is repeatedly deformed from circular to elliptical to circular, which may reduce the lifespan of the rope 3.

Therefore, FIG. 10 shows a solution to these problems. That is, the rope groove 8 is formed of an elastic body 9 made of a polymeric organic material such as rubber or polyurethane resin. As a result, the contact pressure between the rope 3 and the rope groove can be reduced due to the deformation of the elastic body 9, and the deformation of the rope 3 can be reduced to improve the service life.

In this way, the component force in the sheave axis direction of the rope drive blade caused by the forming angle of the rope strand or wire is set so that the rope winding direction matches the direction in which the rope moves backward according to the right-handed or left-handed thread. Because I did it like this,
The rope (crossed, wrapped around the sheave in such a way that the entry point and the exit point for wrapping the sheave form the same plane in a cross section perpendicular to the sheave axis) moves in the sheave axis direction on the rope groove. contact at the intersections of the ropes can be avoided.

The generation of vibration and noise can be prevented, and the elevator system can provide a comfortable ride.

In addition, in the explanation, two deflection wheels 2 are used, and the rope 3 is
We have explained the case where the ropes intersect on one circumference of the sheave, but using two deflector wheels 2, the rope 3 crosses the sheave 1 between the deflection wheels 2, and the rope 3 is wrapped around the sheave 1 at the entrance point. The same applies to the case where the winding exit point and the winding exit point do not form the same plane in a cross section perpendicular to the sheave axis 7 direction.

〔Effect of the invention〕

According to the present invention, the ropes that intersect and are wound around the sheave in such a way that the winding entrance point and winding exit point on the sheave do not form the same plane in a cross section perpendicular to the sheave axis are placed on the rope groove in the sheave axial direction. This makes it difficult to move the ropes, avoids contact at the intersections of the ropes, prevents the generation of vibrations and noise, and provides an elevator system with a comfortable ride.

[Brief explanation of the drawing]

FIG. 1 is a front view of an elevator system showing one embodiment of the present invention, FIG. 2 is a sectional view of the rope groove in FIG. 1, and FIG.
Figures 4 and 5 show the types of ropes depending on how they are twisted.
The figure shows the relationship between the forces acting on the rope strands or wires. Figures 6 to 9 are explanatory diagrams of the rope twisting direction and rope winding direction in Figure 1. Figure 10 is the illustration of the rope winding direction. FIG. 11 is a diagram corresponding to FIG. 2 showing another embodiment of the invention. Figure 12 is a diagram equivalent to Figure 1 showing a conventional elevator system;
FIG. 13 is a view corresponding to FIG. 2 showing the rope groove in FIG. 12. 1... Sheave, 2, 2a, 2b... Deflection wheel% 3.
... Rope, 4... Car, 5... Counterweight, 6... Hoisting machine, 7... Sheave shaft.

Claims (1)

[Scope of Claims] 1. A sheave having a rope groove on its outer periphery, supported by a sheave shaft and driven by a hoist, a rope connecting a car on one side and a counterweight on the other, a rope connected to the car and the balance weight on the other side; The rope intersects with the weight and the deflector wheel holds the weights at appropriate intervals, and the rope groove has a winding entry point and a winding exit point on the same plane in a cross section perpendicular to the sheave axis direction. In an elevator apparatus in which the elevator car is wound in a threaded manner without forming a sheave, the rope is further wound around the deflection wheel, the rope is driven by the sheave, and the car and the counterweight are raised and lowered, The sheave axial component of the rope driving force caused by the forming angle of the rope strands or wires is such that the winding direction of the rope in the rope groove matches the direction in which the rope moves backward according to a right-handed or left-handed thread. An elevator device characterized in that it is set to 2. The elevator system according to claim 1, wherein the rope is Z-twisted, and the rope is wound around the rope groove in a right-handed thread direction. 3. The elevator system according to claim 1, wherein the rope is S-twisted, and the rope is wound around the rope groove in a left-handed thread direction.