WO2006022016A1

WO2006022016A1 - Hoist of elevator

Info

Publication number: WO2006022016A1
Application number: PCT/JP2004/012369
Authority: WO
Inventors: Kenji Inoue; Kazuaki Nakamura
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2004-08-27
Filing date: 2004-08-27
Publication date: 2006-03-02
Also published as: CN100526191C; EP1783089A1; CN1882494A; JPWO2006022016A1; EP1783089A4

Abstract

A hoist of an elevator, comprising a hoist body having a motor and a rotating shaft rotated by the motor. A drive sheave rotatable integrally with the rotating shaft is fixed to the rotating shaft. The drive sheave comprises an annular part for wrapping main ropes on the outer peripheral part thereof. A brake device is installed on the inside of the annular part. The brake device comprises a braking member allowed to come into contact with and separated from the inner peripheral surface of the annular part and a displacement device displacing the braking member.

Description

Specification

Elevator hoisting machine

Technical field

[0001] The present invention relates to an elevator hoisting machine for raising and lowering force, a car and a counterweight.

Background art

[0002] A conventional elevator hoisting machine has been proposed in which a plurality of pads are pressed against a brake disc fixed to a sheave to brake the rotation of the sheave on which the main rope is hung. It is. The outer diameter of the brake disc is larger than the outer diameter of the sheave. Each pad is pressed against the outer periphery of the brake disc by an electromagnetic brake device arranged around the brake disc (see Patent Document 1).

Patent Document 1: Japanese Patent Laid-Open No. 11-157766

Disclosure of the invention

Problems to be solved by the invention

[0004] However, in the conventional elevator hoisting machine, since the electromagnetic brake device is disposed around the brake disc, the entire hoisting machine is increased in size.

Since each pad is pressed against the outer periphery of the brake disc, the main rope oil scattered by the rotation of the sheave adheres to the outer periphery of the brake disc, and each pad is applied to the brake disc. The braking force due to the pressing will decrease.

[0005] The present invention has been made to solve the above-described problems, and is an elevator that can be reduced in size and can prevent a reduction in the braking force of rotation of the drive sheave. The purpose is to obtain a flying machine.

Means for solving the problem

[0006] An elevator hoisting machine according to the present invention includes a hoisting machine main body having a motor and a rotating shaft rotated by the motor, and an annular part on which the main rope of the elevator is hung on the outer periphery. A drive sheave that is arranged at an interval in the axial direction of the rotary shaft and that can rotate integrally with the rotary shaft, and a braking member that can come in contact with and separate from the inner peripheral surface of the annular portion, and an inner peripheral surface And a brake device provided on the inner side of the annular portion.

Brief Description of Drawings

FIG. 1 is a sectional view showing an elevator hoist according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view showing an elevator hoist according to Embodiment 2 of the present invention.

4 is a cross-sectional view taken along line IV-IV in FIG.

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 partial sectional view showing an elevator hoist according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. In the figure, a support base 1 is fixed to the upper part of a hoistway (not shown). On the support stand 1, a lifting machine 2 for raising and lowering a car and a counterweight (both not shown) is provided. The hoisting machine 2 is provided on the hoisting machine body 3, the driving sheave 4 that is rotated by the hoisting machine body 3, and a pair of brake devices for braking the rotation of the driving sheave 4. And 5. A plurality of main ropes (not shown) are suspended on the drive sheave 4 to suspend the force ^ and the counterweight. The car and the counterweight are moved up and down in the hoistway by the rotation of the drive sheave 4.

The hoisting machine main body 3 includes a motor 6 supported by the support base 1 and a rotating shaft 7 extending horizontally from the motor 6 and rotated by the motor 6. The distal end portion of the rotating shaft 7 is rotatably supported by the support base 1. The drive sheave 4 is fixed to an intermediate portion of the rotary shaft 7. As a result, the drive sheave 4 can rotate integrally with the rotary shaft 7.

[0010] The drive sheave 4 includes a sheave portion 8 on which each main rope is strung, and a braking drum 9 that is fixed to a side portion of the sheave portion 8 so as to be adjacent to each other in the axial direction of the rotary shaft 7. have. A plurality of grooves 10 extending in the circumferential direction of the sheave part 8 are provided on the outer peripheral surface of the sheave part 8. Each main rope is hung on the sheave part 8 along each groove part 10. The brake drum 9 is fixed to a side portion of the sheave portion 8 opposite to the lifting machine body 3 side. The braking drum 9 is A fixed portion 11 fixed to 8 and an annular portion 12 provided on the outer peripheral portion of the fixed portion 11 opposite to the sheave portion 8 side. That is, the brake drum 9 is formed with a recess 13 that is opened to the tip end side of the rotary shaft 7 by the fixed portion 11 and the annular portion 12. The inner peripheral surface of the annular portion 12 has a braking surface 14 that extends in the circumferential direction of the annular portion 12.

Each brake device 5 is supported by a support base 1. Each brake device 5 is disposed inside the annular portion 12, that is, in the recess 13. Furthermore, each brake device 5 is disposed at a symmetrical position with respect to the axis of the rotary shaft 7. Each brake device 5 includes a brake piece 15 that is a braking member that can be brought into contact with and separated from the braking surface 14 and a displacement device 16 that displaces the brake piece 15 in a direction of coming into contact with and separated from the braking surface 14. . The rotation of the drive sheave 4 is braked by the contact of each brake piece 15 with the braking surface 14. Further, the braking of the rotation of the drive sheave 4 is released by the release of each brake piece 15 from the braking surface 14.

Each displacement device 16 includes a biasing spring 17 that biases the brake piece 15 in a direction in contact with the braking surface 14 and a brake against the biasing of the biasing spring 17 in a direction away from the braking surface 14. It has an electromagnetic magnet 18 for displacing the piece 15. Each brake piece 15 is separated from the braking surface 14 by energizing the electromagnetic magnet 18, and is displaced in a direction in contact with the braking surface 14 and pressed against the braking surface 14 by stopping energization of the electromagnetic magnet 18. Each brake device 5 is a direct-acting brake device in which the biasing spring 17 directly biases the brake piece 15.

[0013] Inside the braking drum 9, a pair of guide rails 19 for guiding the brake piece 15 are provided. In this example, each brake piece 15 is guided by a common guide rail 19. Each guide rail 19 guides each brake piece 15 so that the direction of contact with and separation from the braking surface 14 is perpendicular to the braking surface 14. Each guide lanelet 19 guides the brake piece 15 along the direction in which the urging spring 17 urges the brake piece 15. The guide rail 19 is fixed to the support base 1.

[0014] In the hoisting machine 2, the dimension of the rotary shaft 7 in the axial direction is larger than the dimension in the radial direction. That is, the hoisting machine 2 is a non-thin type hoisting machine in which the motor 6 and the drive sheave 4 are arranged at intervals in the axial direction of the rotary shaft 7. I'm going. Next, the operation will be described. During normal operation, the electromagnetic magnet 18 is energized. Thereby, each brake piece 15 is separated from the braking surface 14.

When energization of the electromagnetic magnet 18 is stopped, each brake piece 15 is displaced to the braking surface 14 side, that is, radially outward by the biasing force of the biasing spring 17. At this time, each brake piece 15 is displaced while being guided by the guide rail 19. Thereafter, each brake piece 15 is pressed against the braking surface 14. Thereby, the rotation of the drive sheave 4 is braked.

When the electromagnetic magnet 18 is energized, each brake piece 15 is displaced toward the electromagnetic magnet 18 side, that is, radially inward, against the biasing force of the biasing spring 17 by the electromagnetic attractive force of the electromagnetic magnet 18. . Also at this time, each brake piece 15 is displaced while being guided by the guide rail 19. As a result, each brake piece 15 is released from the braking surface 14 and the braking of the drive sheave 4 is released.

[0018] In such an elevator hoisting machine 2, since the brake device 5 is provided inside the braking drum 9, the size of the hoisting machine 2 in the radial direction can be reduced, and the hoisting machine 2 2 can be miniaturized. In addition, because the brake piece 15 comes in contact with and separates from the braking surface 14 on the inner periphery of the braking drum 9, it prevents the main rope oil scattered by the rotation of the drive sheave 4 from adhering to the braking surface 14. Therefore, it is possible to prevent a decrease in the braking force of the rotation of the drive sheave 4.

In addition, the displacement device 16 is opposed to the biasing spring 17 that biases the brake piece 15 in the direction in contact with the braking surface 14 and the biasing spring 17 in the direction away from the braking surface 14. Since it has the electromagnetic magnet 18 for displacing the brake piece 15, the brake piece 15 can be reciprocally displaced more reliably with a simple configuration.

[0020] Further, since a guide rail 19 for guiding the brake piece 15 is provided inside the braking drum 9, that is, in the recess 13, the brake piece 15 can be displaced more reliably, and the brake piece 15 It is possible to prevent the brake piece 15 from being displaced in the rotational direction of the drive sheave 4 when the brake contact with the braking surface 14 occurs.

[0021] In the above example, the braking drum 9 is fixed to the side of the sheave section 8 opposite to the lifting machine main body 3 side. The brake drum 9 may be fixed to the part. In this case, the brake drum 9 is formed with a recess that opens to the lifting machine body 3 side. Also blur The brake device 5 and the guide rail 19 are provided in a recess opened to the lifting machine body 3 side.

[0022] Embodiment 2.

FIG. 3 is a partial sectional view showing an elevator hoist according to Embodiment 2 of the present invention. In the figure, the drive sheave 21 is provided at the intermediate portion of the rotating shaft 7. Further, the drive sheave 21 can rotate integrally with the rotary shaft 7. The drive sheave 21 includes an annular portion 22 having a main rope strung around an outer peripheral portion, a fixed portion 23 that is disposed between the annular portion 22 and the rotating shaft 7 and fixes the annular portion 22 to the rotating shaft 7. have. In addition, the drive sheave 21 is formed with a recess 24 that is opened to the tip end side of the rotary shaft 7 by an annular portion 22 and a fixed portion 23. Furthermore, a plurality of grooves 25 extending in the circumferential direction of the drive sheave 21 are provided on the outer peripheral surface of the drive sheave 21.

A pair of brake devices 5 and a pair of guide lanes 19 are provided inside the annular portion 22, that is, in the recess 24. The configuration of each brake device 5 and each guide rail 19 is the same as that of the first embodiment. Each brake device 5 and each guide rail 19 are supported by a support base 1.

The inner peripheral surface of the annular portion 22 has a braking surface 26 that extends in the circumferential direction of the annular portion 22. The brake piece 15 of each brake device 5 is brought into contact with and separated from the braking surface 26. Other configurations and operations are the same as those in the first embodiment.

In such an elevator hoisting machine, the drive sheave 21 has an annular portion 22 in which a main rope is strung around the outer peripheral portion, and the brake device 5 is located inside the annular portion 22, that is, in the recess 24. Therefore, the size in the radial direction of the hoisting machine can be reduced, and the dimension in the axial direction of the rotary shaft 7 can be made smaller than the hoisting machine 2 in the first embodiment. This makes it possible to further reduce the size of the lifting machine. In addition, because the brake piece 15 comes in contact with and separates from the braking surface 26 on the inner periphery of the annular portion 22, the main rope oil scattered by the rotation of the drive sheave 4 is prevented from adhering to the braking surface 26. Therefore, it is possible to prevent a reduction in the driving force of the rotation of the drive sheave 4.

[0026] In the above example, the recess 24 opened on the tip end side of the rotary shaft 7 is formed in the drive sheave 21, but the recess opened on the hoisting machine body 3 side is provided in the drive sheave 21. You can form it. In this case, the brake device 5 and the guide rail 19 are opened to the lifting machine body 3 side. Provided in the recess.

In each of the above embodiments, the number of brake devices 5 may be two, or one or three or more forces.

Claims

The scope of the claims

[1] A hoisting machine main body having a motor and a rotating shaft rotated by the motor,

A drive sheave having an annular portion on which the main rope of the elevator is hung on an outer peripheral portion, arranged at an interval in the axial direction of the rotary shaft with respect to the motor, and rotatable integrally with the rotary shaft;

A brake member that can be brought into contact with and separated from the inner peripheral surface of the annular portion; and a displacement device that displaces the brake member in a direction toward and away from the inner peripheral surface. Equipment

An elevator hoisting machine, characterized by comprising:

[2] A hoisting machine main body having a motor and a rotating shaft rotated by the motor,

A sheave part on which an elevator main rope is hung on an outer periphery, and an annular part adjacent to the sheave part in the axial direction of the rotary shaft, and the axis of the rotary shaft with respect to the motor A drive sheave arranged at intervals in the direction and rotatable integrally with the rotating shaft, and

An elevator hoisting machine, characterized by comprising:

[3] The displacement device includes a biasing spring that biases the braking member in a direction in contact with the annular portion, and the braking member against the biasing of the biasing spring in a direction away from the annular portion. The elevator hoisting machine according to claim 1 or 2, further comprising an electromagnetic magnet to be displaced.

4. The guide rail according to claim 3, wherein a guide rail that guides the braking member along a direction in which the biasing spring biases the braking member is provided inside the annular portion. Elevator elevator machine.