WO2007007400A1

WO2007007400A1 - Elevator apparatus

Info

Publication number: WO2007007400A1
Application number: PCT/JP2005/012904
Authority: WO
Inventors: Atsushi Mitsui
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2005-07-13
Filing date: 2005-07-13
Publication date: 2007-01-18
Also published as: CN101048332A; EP1902994A1; EP1902994A4; JPWO2007007400A1

Abstract

An elevator car and a counterbalance weight are suspended in a hoistway by main ropes. A drive device for moving up and down the elevator car and the counterbalance weight has a drive sheave over which the main ropes are passed. The surfaces of the main ropes are formed of resin. The main rope are also passed over a driven sheave rotated by movement of the main ropes. Grooves for installing the main ropes are formed in the outer periphery of the driven sheave. A friction coefficient between the inner surfaces of the grooves and the main ropes is set less than that between iron and iron.

Description

Specification

Elevator equipment

Technical field

TECHNICAL FIELD [0001] The present invention relates to a traction-type elevator device that raises and lowers a car and a counterweight suspended in a hoistway by a main rope by a driving force of a driving device. Background art

[0002] In a conventional elevator apparatus, in order to reduce the size of a hoisting machine, a method of hanging a main rope for suspending a car and a counterweight may be a 2: 1 roving method. In such an elevator apparatus, a car suspension car is provided in the car, and a counterweight suspension car is provided in the counterweight. A hoisting machine having a driving sheave is provided at the bottom of the hoistway. Furthermore, a car side return wheel and a counterweight side return wheel are provided in the upper part of the hoistway. One end and the other end of the main rope are connected to the upper part of the hoistway. The main rope is wound from one end in the order of a car suspension car, a car side return wheel, a driving sheave, a counterweight side return wheel, and a counterweight suspension car, and reaches the other end (patent) Reference 1).

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2004-269074

Disclosure of the invention

Problems to be solved by the invention

[0004] Conventionally, when an elevator apparatus is installed, in order to suspend a force and a counterweight with a main rope, the main rope is wound around each sheave while being routed between each sheave. It is. At this time, if the main rope is separated, the sheave rotates with the weight of the main rope, and the main rope may fall at high speed. For this reason, attach a rotation stopper to each sheave and make sure that each sheave does not rotate! Then, wrap the main rope around each sheave.

[0005] Generally, irons are used for sheaves and main ropes such as a driving sheave, a car suspension car, and a car side return wheel of an elevator apparatus. In recent years, in order to increase the coefficient of friction with an iron drive sheave and increase the traction capability of the sheave, a main rope having a surface formed of greaves has been proposed. However, when such a main rope is applied to the above elevator system, there are many sheaves with a large frictional force between each sheave and the main rope. In this state, it takes labor to pull the main rope, and it takes time to wrap the main rope.

[0006] Even after the car and the counterweight are suspended by the main rope, it takes time until the tension of the main rope becomes uniform due to the frictional force between each sheave and the main rope. For example, it takes time to adjust the clearance between the shock absorber provided at the bottom of the hoistway and the lower part of the counterweight.

[0007] The present invention has been made to solve the above-described problems, and even when the surface of the main rope is formed of greaves, the main rope is wound around a plurality of sheaves. The purpose of the present invention is to provide an elevator device that can be easily applied and can easily achieve uniform tension over the entire length of the main rope.

Means for solving the problem

[0008] The elevator apparatus according to the present invention includes a car and a counterweight capable of moving up and down in the hoistway, a surface formed of resin, and駆動 Has a drive sheave that is hung, and has a drive device that raises and lowers the car and the counterweight by rotating the drive sheave, and a driven sheave that is wound around the main rope and rotated by the movement of the main rope The outer periphery of the driven sheave is provided with a groove into which the main rope is inserted, and the friction coefficient between the inner surface of the groove and the main rope is made lower than the friction coefficient between iron and iron.

Brief Description of Drawings

FIG. 1 is a configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view showing the force-side return wheel of FIG.

3 is a cross-sectional view showing an outer peripheral portion of the force-side return wheel in FIG.

FIG. 4 is a cross-sectional view showing an outer peripheral portion of a force-side return wheel according to Embodiment 2 of the present invention.

FIG. 5 is a cross-sectional view showing an outer peripheral part of a force-side return wheel according to Embodiment 3 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Embodiment 1.

FIG. 1 is a configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure In the hoistway l, the force 2 and the counterweight 3 are suspended by a plurality of main ropes 4. At the bottom of the hoistway 1, a lifting machine (driving device) 5 that generates a driving force for raising and lowering the force 2 and the counterweight 3 is provided. The lifting machine 5 has a lifting machine body 6 including a motor and a drive sheave 7 rotated by the lifting machine body 6.

A pair of car suspension wheels 8 are provided at the lower part of the car 2. On the upper part of the counterweight 3, a counterweight suspension car 9 is provided. A car side return wheel 10 and a counterweight side return wheel 11 are provided in the upper part of the hoistway 1. In addition, a car-side tie-fastening device 12 and a counterweight-side tie-fastening device 13 are provided in the upper part of the hoistway 1.

[0012] One end 4a of each main rope 4 is connected to the car-side rope anchoring device 12, and the other end 4b of the main rope 4 is connected to the counterweight-side rope anchoring device 13. Each main rope 4 is wound from one end 4a in the order of each car suspension car 8, car side return wheel 10, drive sheave 7, counterweight side return wheel 11 and counterweight suspension wheel 9, and the other end. 4b has been reached.

Each main rope 4 is moved by the rotation of the drive sheave 7. When each main rope 4 is moved, the car suspension car 8, the counterweight suspension car 9, the force side return wheel 10 and the counterweight side return wheel 11 are rotated. That is, the car suspension wheel 8, the counterweight suspension wheel 9, the force weight side return wheel 10, and the counterweight side return wheel 11 are driven sheaves that are rotated by the movement of the main ropes 4. The force 2 and the counterweight 3 are moved up and down in the hoistway 1 by the movement of the main ropes 4.

[0014] Each main rope 4 is covered with a coating material made of greaves in order to prevent slippage between each sheave 7 ~: L1. That is, the surface of each main rope 4 is formed of greaves. Examples of the material for the covering material include resins such as urethane rubber. When the material of the covering material is urethane rubber, the friction coefficient between the sheave made of iron and the main rope is approximately 0.4 or more.

FIG. 2 is a cross-sectional view showing the car-side return wheel 10 of FIG. In the figure, the car-side return wheel 10 is provided on a fixed shaft 14 that extends horizontally. A bearing 15 is interposed between the car side return wheel 10 and the fixed shaft 14. The car side return wheel 10 is rotatable about a fixed shaft 14.

A plurality of grooves 16 extending in the circumferential direction of the car-side return wheel 10 are provided on the outer peripheral portion of the car-side return wheel 10. The main rope 4 is inserted into each groove 16. FIG. 3 is a cross-sectional view showing the outer periphery of the car-side return wheel 10 of FIG. In the figure, a lining 17 that forms the inner surface of the groove 16 is provided in each groove 16. The main rope 4 is in contact with the lining 17. The friction coefficient between the lining 17 and the main rope 4 is set lower than the friction coefficient between iron and iron. That is, the material of the lining 17 has a lower friction coefficient between the main rope 4 and the friction coefficient between iron and iron. Examples of the material of the lining 17 include fluorinated resin (Teflon (registered trademark)) and a moistening agent for diffusing a solid lubricant. In addition, when the friction coefficient between the main rope 4 and the lining 17 is lower than the friction coefficient between iron and iron, it has been confirmed by experiments that there is no hindrance to the winding work of the main rope 4. ing. In this example, the friction coefficient between the lining 17 and the main rope 4 is lower than about 0.2, which is a lower value than the friction coefficient between iron and iron. Further, the configurations of the car suspension vehicles 8, the counterweight suspension vehicles 9, and the counterweight side return vehicles 11 are the same as the configurations of the car side return vehicles 10.

[0018] On the outer periphery of the drive sheave 7, a plurality of grooves (not shown) into which the main ropes 4 are inserted are provided. The inner surface of each groove portion of the drive sheave 7 is made of iron. That is, the coefficient of friction between the inner surface of the groove 16 provided in the driven sheave 8 and L1 and the main rope 4 is the coefficient of friction between the inner surface of the groove provided in the drive sheave and the main rope 4. Is getting lower.

Next, a procedure for winding each main rope 4 around the drive sheave 7 and the driven sheave 8˜: L 1 will be described. First, the force 2 and the counterweight 3 are fixed in the hoistway 1 by, for example, hanging with a chain so that the force 2 and the counterweight 3 do not fall. Further, a rotation stopper is attached to each of the car suspension cars 8, the counterweight suspension car 9, the car side return wheel 10 and the counterweight side return car 11 so as not to rotate due to contact with the main rope 4.

[0020] After that, one end 4a of each main rope 4 is connected to the force side rope clamp device 12. Then, while pulling each main rope 4, wrap each main rope 8 in the order of each car suspension car 8, force side return wheel 10, drive sheave 7, counterweight side return car 11 and counterweight suspension car 9. Connect the other end 4b of 4 to the counterweight side leash stopper 13.

[0021] After that, in order to adjust the tension of each main rope 4, the car side rope stopper 12 and the counterweight rope anchor device 13 are operated, and the one end 4a and the other end 4b of each main rope 4 are operated. Adjust the vertical position. At this time, if the tension in the common main rope 4 is biased, The main rope 4 slides with respect to the driven sheaves 8 to 11 in a direction in which the magnitude of the tension of the entire length of the main rope 4 becomes uniform (a direction in which the tension deviation becomes small) at a stage where the magnitude of the tension magnitude is small.

[0022] Thereafter, the car 2 and the counterweight 3 are fixed, and the detents attached to the driven sheaves 8 to: L 1 are removed. In this way, each main rope 4 is wound around the drive sheave 7 and the driven sheaves 8-11.

[0023] In such an elevator apparatus, the coefficient of friction between the inner surface of each groove 16 and the main rope 4 provided on the outer periphery of the driven sheave 8 ~: L 1 is the coefficient of friction between iron and iron Therefore, even if the surface of the main rope 4 is made of a resin that is not slippery, the main rope 4 can be easily slid against the driven sheave 8 to: L 1, The operation of winding the main rope 4 around the drive sheave 7 and the driven sheaves 8 to 11 can be facilitated. In addition, even when the main rope 4 is wound around the driven sheave 8 to: L 1 and the tension in the common main rope 4 is biased, the tension is not biased. At a small stage, the main rope 4 can be slid against the driven sheaves 8 to 11, and the tension over the entire length of each main rope 4 can be easily made uniform.

[0024] Further, a lining 17 that forms the inner surface of the groove 16 is provided in each groove 16, and the material of the lining 17 is, for example, fluorine-based resin, so that the surface of the main rope 4 is Even if it is made of non-slidable grease, the main rope 4 can be easily slid with respect to the driven sheave simply by lining (coating) the groove of the existing driven sheave. Can. Therefore, the existing driven sheave 8 can be effectively produced at low cost by effectively using the existing driven sheave.

[0025] Embodiment 2.

In the above example, the lining 17 is provided in each groove portion 16 to reduce the coefficient of friction between the main rope 4 and the groove portion 16, but the material of the outer peripheral portion of the driven sheave 8 ~: L1 itself is used. Therefore, the friction coefficient between the inner surface of the groove and the main rope 4 may be reduced by using a material whose friction coefficient between the main rope 4 and the friction coefficient between iron and iron is lower. ,.

That is, FIG. 4 is a cross-sectional view showing the outer peripheral portion of the car side reverse wheel 10 according to the second embodiment of the present invention. In the figure, the car-side return wheel 10 has a sheave body 21 and a sheave outer peripheral portion 22 provided on the sheave body 21 so as to surround the sheave body 21. Sheave body 21 The material is iron. In addition, the material of the outer periphery 22 of the sheave is considered to be a material whose friction coefficient between the main ropes 4 is lower than that between iron and iron! Examples of the material of the outer peripheral portion 22 of the sheave include ultra high molecular polyethylene, high density polyethylene, and polypropylene.

[0027] The sheave outer peripheral portion 22 is provided with a plurality of groove portions 23 into which the main rope 4 is inserted. Each main rope 4 is in contact with the inner surface of the groove 23. The inner surface of each groove portion 23 is formed from the material of the sheave outer peripheral portion 22. That is, the friction coefficient between the inner surface of the groove 23 and the main rope 4 is set lower than the friction coefficient between iron and iron. In this example, the friction coefficient between the groove 23 and the main rope 4 is lower than 0.2. The configuration of each car suspension wheel 8, the counterweight suspension wheel 9 and the counterweight side return wheel 11 (FIG. 1) is the same as that of the car side return wheel 10 (FIG. 4). Other configurations are the same as those in the first embodiment.

[0028] In such an elevator apparatus, the material of the sheave outer peripheral portion 22 of the driven sheave 8 to: L 1 is, for example, ultra-high molecular weight polyethylene or the like, so that the groove portion 23 of the sheave outer peripheral portion 22 The friction coefficient between the inner surface and the main rope 4 can be made lower than the friction coefficient between iron and iron. Accordingly, the main rope 4 can be easily slid with respect to the driven sheave 8 to: L 1, and the operation of winding the main rope 4 around the drive sheave 7 and the driven sheaves 8 to 11 can be facilitated. Further, it is possible to easily equalize the tension over the entire length of each main rope 4. Further, even if the groove 23 is worn due to friction between the main rope 4 and the groove 23, the friction coefficient between the main rope 4 and the groove 23 can be kept low. Furthermore, even if the lining cannot be coated in the groove for some reason, the driven sheaves 8 to 11 can be easily manufactured.

[0029] Embodiment 3.

In the second embodiment, only the material of the driven sheave 8˜: L 1 is the material whose friction coefficient with the main rope 4 is lower than that between iron and iron. The material of the driven sheaves 8 to 11 itself may be a material whose friction coefficient with the main rope 4 is lower than that between iron and iron.

[0030] That is, FIG. 5 is a cross-sectional view showing the outer peripheral portion of the car side reverse wheel 10 according to Embodiment 3 of the present invention. In the figure, the material of the force wheel return wheel 10 is the outer peripheral portion of the sheave of the second embodiment. The material is the same as the material. A plurality of groove portions 31 into which the main rope 4 is inserted are provided on the outer peripheral portion of the force-side return wheel 10. Each main rope 4 is in contact with the inner surface of the groove 31. The inner surface of each groove 31 is formed of the material of the car side turn wheel 10. That is, the friction coefficient between the inner surface of the groove 31 and the main rope 4 is set lower than the friction coefficient between iron and iron. In this example, the friction coefficient between the groove 31 and the main rope 4 is lower than 0.2. The configuration of each car suspension wheel 8, the counterweight suspension wheel 9, and the counterweight side return wheel 11 (Fig. 1) is the same as that of the force cage side return wheel 10 (Fig. 5). Other configurations are the same as those in the first embodiment. Thus, even if the material of the driven sheave 8 to: L 1 itself is a material whose friction coefficient between the main rope 4 is lower than the friction coefficient between iron and iron, as in the second embodiment, The operation of winding the main rope 4 around the drive sheave 7 and the driven sheaves 8 to 11 can be facilitated, and the tension over the entire length of each main rope 4 can be easily made uniform. Furthermore, even if the groove 31 is worn due to friction between the main rope 4 and the groove 31, the friction coefficient between the main rope 4 and the groove 31 can be maintained in a low state. Furthermore, each driven sheave 8-11 can be produced by integral molding, and the driven sheaves 8-11 can be produced more easily.

Claims

The scope of the claims

[1] A car and counterweight that can be raised and lowered in the hoistway,

A main rope, the surface of which is made of greaves and suspending the car and the counterweight in the hoistway;

A drive device having a drive sheave around which the main rope is wound, and moving up and down the car and the counterweight by rotating the drive sheave;

The main rope is wound around and has a driven sheave rotated by the movement of the main rope,

A groove portion into which the main rope is inserted is provided on the outer peripheral portion of the driven sheave, and the friction coefficient between the inner surface of the groove portion and the main rope is made lower than the friction coefficient between iron and iron. An elevator apparatus characterized by that.

[2] A lining that forms the inner surface of the groove is provided in the groove.

2. The elevator apparatus according to claim 1, wherein the material of the lining is a material whose friction coefficient with the main rope is lower than that between iron and iron.

[3] The material of the outer peripheral portion of the driven sheave is characterized in that the coefficient of friction between the main rope is lower than the coefficient of friction between iron and iron! The elevator apparatus according to claim 1.

[4] The material according to claim 1, wherein the material of the driven sheave is a material whose friction coefficient between the main rope is lower than that between iron and iron. Elevator device.

[5] The material having a lower coefficient of friction with the main rope than the coefficient of friction between iron and iron is characterized by being one of ultrahigh molecular polyethylene, high density polyethylene, and polypropylene. The elevator apparatus according to claim 3 or claim 4.