WO2002048016A1

WO2002048016A1 - Hoist for elevator

Info

Publication number: WO2002048016A1
Application number: PCT/JP2000/008747
Authority: WO
Inventors: Hukami Aoki
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2000-12-11
Filing date: 2000-12-11
Publication date: 2002-06-20
Also published as: EP1707528B2; DE60045719D1; EP1707528A1; EP1707528B1; EP1357076A1; JPWO2002048016A1; EP1818306B1; EP1818306A1; EP2263962B1; EP2263962A1; EP1357076B1; EP1357076A4; DE60043829D1; CN1433374A; CN1192971C

Abstract

A hoist for an elevator, wherein a rotating shaft (6) supported rotatably on bearing stands (2, 3) is rotated by a driving force of a drive motor (8) so as to move a car up and down through a main cable (7), a main cable application part (6a) for applying the main cable (7) thereto is formed integrally with the rotating shaft (6) and a plurality of rope grooves (6b) for inserting the main rope (7) therein are provided in the main rope application part (6a).

Description

Description Elevator overnight hoist Technical field

The present invention relates to a hoisting machine for raising and lowering a car via a main rope. Background art

In the conventional elevator hoisting machine, a driving sheave, which is a member separate from the rotating shaft, is fixed to the rotating shaft rotated by the driving motor. A rope groove is formed in the drive sheave, and a main rope for suspending the car is wound therearound.

The drive sheave is required to be able to smoothly rotate while receiving the rope load and generating traction force. For this reason, the drive sheave must have sufficient hardness and strength and be processed with high accuracy. In addition, in order to transmit a large winding torque from the drive motor, the drive sheave is firmly fitted to the rotating shaft by a method such as shrink fitting or using a key. Therefore, the conventional drive sheave is made of a thick, high-strength material, which hinders the reduction in size and weight of the elevator for the elevator.

In addition, when a main rope made of steel rope is used, the flexibility of the steel

D / d (drive sheave diameter / main rope diameter) is required to be 40 or more, which also increases the size of the drive sheave.

In contrast, main ropes made of synthetic fiber ropes have recently been realized. Since such a synthetic fiber rope has a high coefficient of friction and excellent flexibility, it is possible to reduce D / d to about 25 and to reduce the size of the driving sheave.

However, especially in a large-capacity hoist used for a large-sized erepeater, since the diameter of the rotating shaft is large, when the diameter of the driving sheep is reduced, the difference between the diameter of the driving sheave and the diameter of the rotating shaft is reduced. That is, when the diameter of the drive sheave is minimized, the drive sheave becomes thinner, and it becomes difficult to manufacture the drive sheave and to fit it into the rotating shaft. For this reason, miniaturization of the drive sheave and, consequently, reduction of the size and weight of the hoist are limited in terms of manufacturing and assembly. May be done. Disclosure of the invention

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an elevator capable of reducing the number of parts, facilitating assembly, and reducing the size and weight. The purpose is to obtain.

An elevator hoisting machine according to the present invention includes a bearing base, a rotatable shaft rotatably supported by the bearing base, and a rotating shaft for raising and lowering a car via a main rope by rotation, a driving motor for rotating the rotating shaft, and It is provided with a brake device for braking the rotation of the rotating shaft, wherein a main rope winding portion provided with a rope groove into which the main rope is inserted is formed integrally with the rotating shaft. . BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a side view showing a hoisting machine for an elevator in accordance with Embodiment 1 of the present invention. FIG. 2 is a perspective view showing a structure of a main rope in FIG.

FIG. 3 is a side view showing an elevator hoisting machine according to Embodiment 2 of the present invention, and FIG. 4 is a side view showing an elevator hoisting machine 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 side view showing an elevator hoisting machine according to Embodiment 1 of the present invention. In FIG. 1, a pair of bearing stands 2 and 3 are fixed on a base 1. Bearings 2 and 3 respectively support bearings 4 and 5, and both ends of the rotary shaft 6 are rotatably supported via these bearings 4 and 5. The rotating shaft 6 is made of, for example, carbon steel.

In a middle part of the rotating shaft 6, a main rope winding portion 6a around which a main rope 7 suspending a car and a counterweight (neither is shown) is formed in a body. The main rope winding portion 6a is provided with a plurality of rope grooves 6b into which the main rope 7 is inserted. Main rope The hook 6a is forged when the rotary shaft 6 is manufactured. The rope groove 6 may be formed by lathing or forging. When the rope groove 6b is formed by forging, the number of manufacturing steps is reduced, and no waste of material occurs.

The horse that rotates the rotating shaft 6 and the motor 8 have a stator 9 fixed on the base 1 and a rotor 10 mounted on an intermediate portion of the rotating shaft 6. The rotating shaft 6 is directly rotated by the drive motor 8 without any gear.

The brake device 11 that brakes the rotation of the rotation shaft 6 includes a brake disk 12 that rotates integrally with the rotation shaft 6 and a brake device body 13 that brakes the rotation of the brake disk 12. The diameter of the portion of the rotating shaft 6 adjacent to the main rope wrap 6a is smaller than the diameter of the main rope wrap 6a, and the brake disc 12 is attached to the axis of the main rope wrap 6a. And is fixed to the rotating shaft 6. Further, the brake disk 12 is fixed to the rotating shaft 6 by a plurality of bolts 14 extending parallel to the axial direction of the rotating shaft 6 and screwed to the end face of the main rope winding portion 6a.

Next, FIG. 2 is a perspective view showing the structure of the main rope 7 in FIG. In the figure, an inner strand layer 24 having a plurality of inner strands 22 and a filling strand 23 arranged in a gap between the inner strands 22 is disposed around the core wire 21. Have been. Each internal strand 22 is composed of a plurality of aramide fibers and an impregnating material such as polyurethane. The filling strand 23 is made of, for example, polyamide.

An outer strand layer 26 having a plurality of outer strands 25 is arranged on the outer periphery of the inner strand layer 24. Each outer strand 25, like the inner strand 22, is composed of a plurality of aramide fibers and an impregnating material such as polyurethane.

Between the inner strand layer 24 and the outer strand layer 26, a friction-reducing coating layer 27 is disposed to avoid wear of the strands 22 and 25 due to friction between the strands 22 and 25. ing. In addition, a protective coating layer 28 is arranged on the outer periphery of the outer strand layer 26.

Such a synthetic fiber rope has a higher coefficient of friction and is more flexible than a steel rope. In the hoisting machine for an elevator constructed as described above, the main cable hooking portion 6a is formed integrally with the rotary shaft 6 without using a separate drive sheave. The number of points can be reduced, and shrink-fitting machining is not required, so that assembly can be facilitated. In addition, the diameter of the main rope winding portion 6a can be minimized, so that the overall size and weight can be reduced.

Such a hoisting machine for an elevator can be used for a main rope made of a steel rope if the diameter of the main rope hooking section 6a is sufficiently secured, but it is intended to reduce the size and weight. For this purpose, it is effective to use it for the main rope 7 consisting of a synthetic fiber mouthpiece.

In addition, since the main rope winding portion 6a is made of the same material as the rotating shaft 6, the use of the steel mouthpiece easily causes the rope groove 6b to be worn. On the other hand, in the case of a synthetic fiber opening, the rope groove 6b is less likely to be worn. Furthermore, since the synthetic fiber rope has a high coefficient of friction, it is not necessary to provide an undercut groove in the rope groove 6b to increase the frictional force. It is effective to use it.

In addition, since the brake disc 12 can be attached using the end surface of the main rope hooking portion 6a integrated with the rotating shaft 6, the brake disc 12 can be easily and firmly fixed to the rotating shaft 6. . Embodiment 2

Next, FIG. 3 is a side view showing a roller winding machine according to Embodiment 2 of the present invention. In the figure, a bearing base 32 is fixed on a base 31. A bearing 33 is supported by the bearing base 32, and an intermediate portion of the rotating shaft 34 is rotatably supported via the bearing 33. The rotating shaft 34 is made of, for example, carbon steel.

At one end of the rotating shaft 34, a main rope winding portion 34a around which the main rope 7 is wound is formed in a body. A plurality of rope grooves 34 into which the main rope 7 is inserted are provided in the main rope winding portion 34a.

The drive motor 35 that rotates the rotating shaft 34 is a case fixed to the bearing base 32

36, a stator 3 7 fixed in this case 36, and a rotating shaft 34 And a rotor 38. The rotating shaft 34 is directly rotated by the drive 35 without going through a gear. In this example, a drive motor 35 using a permanent magnet for the rotor 38 is used. The case 36 holds a bearing 39 that rotatably supports the other end of the rotating shaft 34.

The brake device 11 that brakes the rotation of the rotating shaft 34 has a brake disk 12 that rotates integrally with the rotating shaft 34 and a brake device body 13 that brakes the rotation of the brake disk 12. . The brake disc 12 is fixed to the rotating shaft 34 by being joined to an axial end face of the main rope winding portion 6a. Further, the brake disk 12 is fixed to the rotating shaft 34 by a plurality of bolts 14 extending parallel to the axial direction of the rotating shaft 34 and screwed to the end face of the main rope winding portion 34 a. .

As described above, the main rope winding portion 34 a may be formed at one end of the rotating shaft 34, and when the number of the opening grooves 34 b is small, the whole can be effectively reduced in size. be able to. Embodiment 3.

Next, FIG. 4 is a side view showing a hoisting machine for an elevator according to Embodiment 3 of the present invention. In the figure, a pair of bearing pedestals 4 2 and 4 3 are fixed on a pace 41. Bearings 42, 43 support bearings 44, 45, respectively, and a rotating shaft 46 is rotatably supported via these bearings 44, 45. The rotating shaft 46 is made of, for example, carbon steel.

A main rope winding part 46 a around which the main rope 7 is wound is formed on the rotating shaft 46 in a body. A plurality of rope grooves 46 b into which the main rope 7 is inserted are provided in the main rope winding portion 46 a.

A drive motor 47 for rotating the rotating shaft 46 is mounted on a case 48 fixed to the bearing base 42, a stator 49 fixed in the case 48, and an end of the rotating shaft 46. Rotator 50. The rotating shaft 46 is directly rotated by the driving motor 47 without passing through a gear. In this example, an evening drive mode 47 using a permanent magnet for the rotor 50 is used.

The brake device 11 that brakes the rotation of the rotating shaft 46 includes a brake disk 12 that rotates integrally with the rotating shaft 46 and a brake that brakes the rotation of the brake disk 12. The main body 13 is provided. The diameter of the portion of the rotating shaft 46 adjacent to the main rope wrap portion 46a is smaller than the diameter of the main rope wrap portion 46a, and the brake disc 12 is 6a is fixed to the rotating shaft 46 by being joined to the axial end face. Further, the brake disc 12 is fixed to the rotating shaft 46 by a plurality of bolts 14 extending parallel to the axial direction of the rotating shaft 46 and screwed to the end surface of the main rope winding portion 46a. I have. In such an elevator hoisting machine, the drive motor 47 is disposed overhanging outside the pair of bearing bases 42, 43. Therefore, it is suitable when a relatively small drive motor 47 is used, and it is easier to further reduce the size of the whole, for example, the base 41 can be made smaller.

In the first to third embodiments, the gearless type hoist has been described. However, the present invention is also applicable to a geared type hoist that transmits the driving force of the driving motor to the rotating shaft via a deceleration mechanism. Is applicable.

Claims

The scope of the claims

1. Bearing base,

A rotating shaft that is rotatably supported by the bearing base and that raises and lowers the car through a main rope by rotation;

A drive motor for rotating the rotating shaft, and

Brake device for braking the rotation of the rotating shaft

''

An hoisting machine for an elevator, wherein a main rope hooking section provided with a rope groove into which the main rope is inserted is formed integrally with the rotating shaft.

2. The brake device has a brake disk that rotates integrally with the rotation shaft, and a brake device main body that brakes the rotation of the brake disk, and is adjacent to the main rope winding portion of the rotation shaft. The diameter of the portion to be bent is such that the diameter of the main rope hooking portion is also small, and the brake disc is joined to the axial end surface of the main rope hooking portion and fixed to the rotating shaft. The hoisting machine according to claim 1, wherein

3. The elevator according to claim 2, wherein the brake disk is fixed to the rotating shaft by a plurality of bolts extending parallel to the axial direction of the rotating shaft and screwed to an end surface of the main cable hoop. An overnight hoist.

4. The hoisting machine according to claim 1, wherein a rotor of the driving motor is mounted on the rotating shaft, and the rotating shaft is directly driven by the driving motor.

5. The elevator according to claim 4, wherein both ends of the rotary shaft are supported by the bearing stand, and the rotor is mounted at an intermediate portion of the rotary shaft and the main cable hooking portion is formed. An overnight hoist.

6. An intermediate portion of the rotating shaft is supported by the bearing stand, and is provided at one end of the rotating shaft. 5. The winding for an elevator according to claim 4, wherein the main rope winding portion is formed, and the rotor is mounted on a side of the rotating shaft opposite to the main rope winding portion. Good machine.

7. One end and an intermediate portion of the rotating shaft are supported by the bearing stand, the main cable winding portion is formed at an intermediate portion of the rotating shaft, and the rotor is mounted at the other end of the rotating shaft. The hoisting machine according to claim 4, wherein the hoisting machine is used for an elevator.

8. The hoisting machine according to claim 1, wherein the rope groove is formed by forging.