JP2003002567A - Elevator hoist - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator winding machine capable of eliminating an electromagnetic wave noise generated in an electric motor, and of facilitating checking of a device for eliminating the electromagnetic wave noise. SOLUTION: This winding machine for the elevator comprises an electronic motor 5; a sheave 8 for frictionally driving a main rope 9 for suspending a car 10; a brake wheel 11 connected with the rotary shaft 6 for braking the sheave 8; and the device 20 for eliminating the electromagnetic wave noise for constantly grounding the brake wheel 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator hoisting machine for raising and lowering a car through a main rope.

[0002]

2. Description of the Related Art FIG. 5 shows, for example, Japanese Examined Patent Publication No. 59-10278.
FIG. 6 is a front view showing the configuration of the conventional elevator hoisting machine disclosed in Japanese Patent Publication No. 6 and FIG. 6 is a side view of the same. In these drawings, 1 is an elevator hoistway, 2 is a machine room provided at the top of the hoistway, 3 is a support beam installed on the floor of the machine room 2, 4 is this support beam 3 and the wall of the machine room 5 is a motor stand installed on the machine stand 4, 6 is an electric motor 5 installed on the machine stand 4,
Rotation shaft, 7 is a support leg that rotatably supports the end of the rotation shaft 6 through a bearing (not shown), and 8 is the rotation shaft 6
A sheave attached to a substantially central portion of the vehicle, 9 is a main rope wound around the sheave 8 and driven by friction, and a car 10 is suspended at one end thereof. Reference numeral 11 is a brake wheel attached to the rotary shaft 6 adjacent to the sheave 8, and 12 is a pair of brake arms provided so as to face the peripheral surface of the brake wheel 11, one end of which is rotatably supported by a shaft 13. The other end is constantly pressed by the brake spring 14 toward the brake wheel 11 side.

Reference numeral 15 denotes a brake shoe which is attached to the brake arm 12 so as to face the peripheral surface of the brake wheel 11. The brake shoe 15 holds the peripheral surface of the brake wheel 11 from both sides to stop the sheave 8. ing. Reference numeral 16 is a brake coil for releasing the brake state, and when the operating voltage is applied, the other end of the brake arm 12 is moved to the side opposite to the brake wheel against the brake spring 14 to separate the brake shoe 15 from the brake wheel 11. It is a thing. Reference numeral 17 is a deflector wheel attached to the machine base 4 and guiding the other end of the main rope 9 wound around the sheave 8 to the position of the counterweight 18.

In the elevator hoisting machine having such a structure, the brake spring 14 presses the other end of the brake arm 12 toward the brake wheel 11 when no voltage is applied to the electric motor 5 and the brake coil 16. The brake shoe 15 presses and grips the peripheral surface from both sides of the brake wheel 11 to bring it into a braking state, and stops the sheave 8 and stops the car 10. When a voltage is applied to the electric motor 5 and the brake coil 16, the other end of the brake arm 12 moves toward the anti-brake wheel side against the brake spring 14, so that the brake shoe 15 is separated from the brake wheel 11 and is in the braking state. Is released, the sheave 8 is driven by the electric motor 5, the main rope 9 is wound, and the car 10 is moved up and down.

[0005]

Since the conventional elevator hoisting machine is constructed as described above, when the electric motor 5 is stopped, leakage current from the electric motor 5 passes through the rotary shaft 6. , Since it flows to the support leg 7 through a bearing (not shown) and further flows to the machine base 4 to reach the ground, no axial noise (electromagnetic noise) is generated, but the brake state is released and the electric motor 5 is released. In a state where the rotary shaft 6 is rotated at a high speed during operation, the grease in the bearing insulates the rotary shaft 6 and the support leg 7 from each other, and the leakage current from the electric motor 5 flows through the machine base 4 to the ground side. Since it is not present, it is radiated into the air as axial noise (electromagnetic noise). Also, brake wheel 1
1 is released from the braking state, the brake shoe 1
Since a gap is created between the brake wheel 5 and the brake wheel 11, the brake wheel 11 rotates at a high speed to generate air friction and generate static electricity. Further, the static electricity is generated between the brake wheel 11 and the brake wheel 11. When the gap is changed, it is emitted into the air as electromagnetic noise. In recent years, electromagnetic wave noise generated from a device may interfere with other devices, which may cause various troubles such as malfunction. Therefore, it is necessary to eliminate the emission of the electromagnetic wave noise.

The present invention has been made to solve the above problems, and it is a first object of the present invention to provide an elevator hoisting machine capable of removing electromagnetic noise generated in an electric motor. . A second object is to provide an elevator hoisting machine that can easily perform maintenance and inspection of a device that removes electromagnetic noise.

[0007]

An elevator hoisting machine according to the present invention includes an electric motor, a sheave that is coupled to a rotary shaft of the electric motor and frictionally drives a main rope that suspends a car, and a sheave. It is provided with a brake wheel that is coupled to the sheave so as to be able to stop the sheave, and an electromagnetic noise elimination device that constantly grounds the brake wheel.

In the elevator hoisting machine according to the present invention, the electromagnetic noise elimination device grounds the brake wheel via a brush that is in sliding contact with the brake wheel.

In the elevator hoisting machine according to the present invention, the electromagnetic noise elimination device is also installed in the brush holder near the brake wheel in a grounded state, and is housed in the brush holder, and the tip portion is removed from the brush holder. The brush is configured to protrude so as to be in sliding contact with the brake wheel, and a spring that is provided in the brush holder and presses the brush in a direction to project from the brush holder.

In the elevator hoisting machine according to the present invention, the brush holder is also provided with an inspection window through which the worn state of the brush can be confirmed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the configuration of the first embodiment, and FIG. 2 is a side view of the same. In these figures, the same or corresponding parts as those in FIG. 5 and FIG. The difference from FIGS. 5 and 6 is that an electromagnetic noise elimination device is provided. That is, in FIG. 1 and FIG. 2, reference numeral 20 is an electromagnetic noise elimination device, and its detailed configuration is shown in FIG. In FIG. 3, 20a is a brush that contacts the side surface of the brake wheel 11, 20b is a brush holder that holds the brush 20a,
The brush 20c is provided in the brush holder 20b.
a spring that presses a in a direction protruding from the brush holder,
Reference numeral 20d is an attachment fitting for fixing the brush holder 20b to the machine base 4, and 20e is a fixing screw.

Since the first embodiment is configured as described above, electromagnetic wave noise generated from the rotary shaft 6 is driven and stopped by the brake wheel 11-brush 20a-spring 20c-mounting bracket 20d. However, as a result of being grounded to the machine base 4, the emission of electromagnetic noise is eliminated.

Embodiment 2. Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 4 shows the second embodiment.
It is a schematic diagram showing a configuration of. In this figure, parts that are the same as or correspond to those in FIG. The difference from FIG. 3 is that an inspection window is provided on the brush holder. That is, in FIG. 4, 20f is an inspection window provided on the brush holder 20b.

Since the second embodiment is constructed as described above, the brush 20 is rotated by the rotation of the brake wheel 11.
The wear state of a can be easily confirmed through the inspection window 20f. Therefore, maintenance such as brush replacement can be performed in a timely manner.

[0015]

The elevator hoisting machine according to the present invention comprises:
An electric motor, a sheave that is coupled to the rotary shaft of the electric motor and frictionally drives a main rope that suspends a car, a brake wheel that is coupled to the rotary shaft and is capable of stopping the sheave, and the brake wheel. Since it is provided with an electromagnetic wave noise removing device that constantly grounds the electromagnetic wave, it does not emit electromagnetic wave noise.

In the elevator hoisting machine according to the present invention, the electromagnetic noise elimination device is also installed in the brush holder near the brake wheel in a grounded state, and the brush holder accommodates the tip end of the brush holder. It consists of a brush that protrudes so that it can be brought into sliding contact with the brake wheel, and a spring that is provided inside the brush holder and presses the brush in the direction that it protrudes from the brush holder. A maintenance window is provided so that maintenance and inspection can be performed in a timely manner.

[Brief description of drawings]

FIG. 1 is a front view showing a configuration of a first embodiment of the present invention.

FIG. 2 is a side view showing the configuration of the first embodiment of the present invention.

FIG. 3 is a schematic diagram showing a configuration of an electromagnetic noise elimination device according to the first embodiment.

FIG. 4 is a schematic diagram showing a configuration of a second embodiment of the present invention.

FIG. 5 is a front view showing a configuration of a conventional elevator hoisting machine.

FIG. 6 is a side view showing a configuration of a conventional elevator hoisting machine.

[Explanation of symbols]

1 hoistway, 2 machine room, 4 machine base, 5
Electric motor, 6 rotating shafts, 8 sheaves, 9 main ropes, 10 cars, 11 brake wheels,
12 brake arms, 14 brake springs,
15 brake shoes, 16 brake coils,
20 electromagnetic noise elimination device, 20a brush,
20b brush holder, 20c spring, 2
0d mounting bracket, 20f inspection window.

Claims (4)

[Claims] 1. An electric motor, a sheave that is coupled to a rotary shaft of the electric motor and frictionally drives a main rope that suspends a car, and a sheave that is coupled to the rotary shaft so that the sheave can be stopped. An elevator hoisting machine comprising a brake wheel and an electromagnetic noise elimination device for constantly grounding the brake wheel. 2. The elevator hoisting machine according to claim 1, wherein the electromagnetic noise elimination device is configured such that the brake wheel is grounded via a brush that is in sliding contact with the brake wheel. 3. The electromagnetic noise eliminator includes a brush holder mounted near the brake wheel in a grounded state, and housed in the brush holder so that a tip portion of the brush holder can protrude from the brush holder and come into sliding contact with the brake wheel. The hoisting machine for an elevator according to claim 1, characterized in that the hoisting machine comprises: a brush and a spring that is provided in the brush holder and presses the brush in a direction projecting from the brush holder. 4. The elevator hoisting machine according to claim 3, wherein the brush holder is provided with an inspection window for confirming a worn state of the brush.