JPWO2007007400A1 - Elevator equipment - Google Patents

Abstract

A car and a counterweight are suspended by a main rope in the hoistway. A drive device that raises and lowers a car and a counterweight has a drive sheave around which a main rope is wound. The surface of the main rope is made of resin. The main rope is also wound around a driven sheave that is 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. The coefficient of friction between the inner surface of the groove and the main rope is set lower than the coefficient of friction between iron and iron.

Description

  The present invention relates to a traction type elevator apparatus that raises and lowers a car and a counterweight suspended in a hoistway by a main rope by a driving force of a driving apparatus.

  In the conventional elevator apparatus, in order to reduce the size of the hoisting machine, the method of hanging the main rope for suspending the car and the counterweight may be a 2: 1 roping 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 part in the order of a car suspension car, a car side return wheel, a driving sheave, a counterweight side return car, and a counterweight suspension car (see Patent Document 1). ).

JP 2004-269074 A

  Conventionally, when the elevator apparatus is installed, in order to suspend the car and the counterweight with the main rope, the main rope is wound around each sheave while the main rope is routed between the sheaves. At this time, if the main rope is inadvertently separated, the sheave rotates with the weight of the main rope, and the main rope may fall at a high speed. For this reason, after attaching a rotation stopper to each sheave so that each sheave does not rotate, the main rope is wound around each sheave.

  In general, 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, a main rope having a surface formed of a resin has been proposed in order to increase the coefficient of friction with an iron drive sheave and enhance the traction capability of the sheave. However, when such a main rope is applied to the above-described elevator apparatus, the frictional force between each sheave and the main rope is large, and the number of sheaves is large, so a rotation stopper is attached to each sheave. In the state, it takes labor to pull the main rope, and it takes time to wrap the main rope.

  In addition, 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. It takes time to adjust the clearance between the shock absorber provided at the bottom of the balance and the lower part of the counterweight.

  The present invention has been made to solve the above-described problems, and even when the surface of the main rope is formed of a resin, the operation of winding the main rope around a plurality of sheaves can be easily performed. An object of the present invention is to provide an elevator apparatus that can easily achieve uniform tension over the entire length of the main rope.

  The elevator apparatus according to the present invention has a car and a counterweight that can be moved up and down in the hoistway, a surface formed of resin, and a main rope that suspends the car and the counterweight in the hoistway and a drive on which the main rope is wound A drive device that has a sheave and moves the car sheave 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, on the outer periphery of the driven sheave Is provided with a groove part into which the main rope is inserted, and the friction coefficient between the inner surface of the groove part and the main rope is lower than the friction coefficient between iron and iron.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. It is sectional drawing which shows the cage | basket | car side return wheel of FIG. It is sectional drawing which shows the outer peripheral part of the cage | basket | car side reverse wheel of FIG. It is sectional drawing which shows the outer peripheral part of the cage | basket | car side reverse wheel by Embodiment 2 of this invention. It is sectional drawing which shows the outer peripheral part of the cage | basket | car side reverse wheel by Embodiment 3 of this invention.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a car 2 and a counterweight 3 are suspended in a hoistway 1 by a plurality of main ropes 4. A hoisting machine (driving device) 5 that generates a driving force for raising and lowering the car 2 and the counterweight 3 is provided at the bottom of the hoistway 1. The hoisting machine 5 includes a hoisting machine main body 6 including a motor, and a drive sheave 7 rotated by the hoisting machine main 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 vehicle 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 rope fixing device 12 and a counterweight-side rope fixing device 13 are provided in the upper part of the hoistway 1.

  One end 4 a of each main rope 4 is connected to the car-side rope fixing device 12, and the other end 4 b of the main rope 4 is connected to the counterweight-side rope fixing device 13. Each main rope 4 is wound from the one end 4a in the order of each car suspension wheel 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 car 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 car 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 car 2 and the counterweight 3 are moved up and down in the hoistway 1 by the movement of the main ropes 4.

  Each main rope 4 is covered with a resin covering material in order to prevent slipping between the sheaves 7 to 11. That is, the surface of each main rope 4 is formed of resin. Examples of the material of the covering material include resins such as urethane rubber. In addition, when the material of the covering material is urethane rubber, the friction coefficient between the sheave formed 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 is a material whose friction coefficient between the main ropes 4 is lower than that between iron and iron. Examples of the material of the lining 17 include fluorine resin (Teflon (registered trademark)) and plating in which a solid lubricant is diffused. 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 experiment that there is no problem in the winding work of the main rope 4. . In this example, the friction coefficient between the lining 17 and the main rope 4 is lower than about 0.2, which is a value lower than the friction coefficient between iron and iron. 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.

  A plurality of grooves (not shown) into which the main ropes 4 are inserted are provided on the outer periphery of the drive sheave 7. The inner surface of each groove portion of the drive sheave 7 is made of iron. That is, the friction coefficient between the inner surface of the groove portion 16 provided in the driven sheaves 8 to 11 and the main rope 4 is lower than the friction coefficient between the inner surface of the groove portion provided in the drive sheave and the main rope 4. ing.

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

  Thereafter, one end 4 a of each main rope 4 is connected to the car-side rope stopping device 12. Thereafter, while pulling each main rope 4, each car suspension car 8, car side return wheel 10, drive sheave 7, counterweight side return wheel 11, and counterweight lifter 9 are wound around in order. Is connected to the counterweight side leashing device 13.

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

  Thereafter, the car 2 and the counterweight 3 are unfixed, and the detents attached to the driven sheaves 8 to 11 are removed. In this way, each main rope 4 is wound around the drive sheave 7 and the driven sheaves 8 to 11.

  In such an elevator apparatus, the friction coefficient between the inner surface of each groove part 16 provided in the outer peripheral part of driven sheaves 8-11 and the main rope 4 is made lower than the friction coefficient between iron and iron. Therefore, even if the surface of the main rope 4 is formed of a resin that is difficult to slip, the main rope 4 can be easily slid relative to the driven sheaves 8 to 11, and the main rope 4 is driven to the drive sheave 7. And the work wound around the driven sheaves 8 to 11 can be facilitated. Further, even when the main rope 4 is wound around the driven sheaves 8 to 11 and the tension in the common main rope 4 is biased, the tension is biased at a small level. The main rope 4 can be slid with respect to the driven sheaves 8 to 11, and the tension over the entire length of each main rope 4 can be easily made uniform.

  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, a fluorine resin, so that the surface of the main rope 4 is made of a resin that does not slip easily. Even if it is formed, the main rope 4 can be easily slid with respect to the driven sheave only by providing (coating) the lining in the groove portion of the existing driven sheave. Therefore, it is possible to easily produce the driven sheaves 8 to 11 at low cost by effectively using the existing driven sheave.

Embodiment 2. FIG.
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 sheaves 8 to 11 is mainly used. 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 ropes 4 is lower than that between iron and iron.

  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. The material of the sheave body 21 is iron. Moreover, the material of the sheave outer peripheral part 22 is made into the material whose friction coefficient between main ropes 4 is lower than the friction coefficient 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.

  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 of 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 coefficient of friction between the groove 23 and the main rope 4 is lower than 0.2. Moreover, the structure of each car suspension vehicle 8, the counterweight suspension vehicle 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.

  In such an elevator apparatus, the material of the sheave outer peripheral portion 22 of the driven sheaves 8 to 11 is, for example, ultra-high molecular weight polyethylene, so that the inner surface of the groove portion 23 provided in the sheave outer peripheral portion 22 and the main rope 4 The friction coefficient between can be made lower than the friction coefficient between iron and iron. Thereby, the main rope 4 can be easily slid with respect to the driven sheaves 8 to 11, and the work 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. Furthermore, even if the groove portion 23 is worn due to friction between the main rope 4 and the groove portion 23, the friction coefficient between the main rope 4 and the groove portion 23 can be maintained in a low state. Furthermore, even if the lining cannot be coated in the groove due to some cause, the driven sheaves 8 to 11 can be easily manufactured.

Embodiment 3 FIG.
Moreover, in Embodiment 2, although only the material of the outer peripheral part of the driven sheaves 8-11 is made into the material whose friction coefficient between the main ropes 4 is lower than the friction coefficient between iron, it is driven. The material of the 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.

  That is, FIG. 5 is a sectional view showing the outer peripheral portion of the car side reverse wheel 10 according to the third embodiment of the present invention. In the figure, the material of the car-side return wheel 10 is the same as the material of the sheave outer peripheral portion 22 of the second embodiment. A plurality of groove portions 31 into which the main rope 4 is inserted are provided on the outer peripheral portion of the car-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 portion 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. Moreover, the structure of each car suspension vehicle 8, the counterweight suspension vehicle 9, and the counterweight side return wheel 11 (FIG. 1) is the same as that of the car side return wheel 10 (FIG. 5). Other configurations are the same as those in the first embodiment.

In this way, even if the material of the driven sheaves 8 to 11 itself is a material whose friction coefficient with the main rope 4 is lower than the friction coefficient between iron and iron, the main rope is the same as in the second embodiment. 4 can be easily wound around the drive sheave 7 and the driven sheaves 8 to 11, and the tension over the entire length of each main rope 4 can be easily equalized. Furthermore, even if the groove portion 31 is worn due to friction between the main rope 4 and the groove portion 31, the friction coefficient between the main rope 4 and the groove portion 31 can be maintained in a low state. Furthermore, each driven sheave 8-11 can be manufactured by integral molding, and the driven sheaves 8-11 can be manufactured more easily.

Claims (5)

A car and a counterweight capable of moving up and down in the hoistway;
A main rope whose surface is made of resin and suspends the car and the counterweight in the hoistway;
A drive sheave around which the main rope is wound, and a drive device that lifts and lowers the car and the counterweight by rotating the drive sheave; With a driven sheave that is rotated,
The outer periphery of the driven sheave is provided with a groove into which the main rope is inserted,
The elevator apparatus characterized by the friction coefficient between the inner surface of the said groove part and the said main rope being made lower than the friction coefficient between iron and iron. 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 lining material is made of a material having a lower coefficient of friction with the main rope than a coefficient of friction between iron and iron.   2. The elevator according to claim 1, wherein a material of the outer peripheral portion of the driven sheave is a material having a lower coefficient of friction with the main rope than a coefficient of friction between iron and iron. apparatus.   The elevator apparatus according to claim 1, wherein a material of the driven sheave is a material having a lower coefficient of friction with the main rope than a coefficient of friction between iron and iron. 4. The material according to claim 3, wherein the coefficient of friction between the main ropes is lower than the coefficient of friction between iron and iron, and is one of ultrahigh molecular polyethylene, high density polyethylene, and polypropylene. The elevator apparatus according to claim 4.

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