JPH0776474A - Vibration-proofing device for elevator car - Google Patents

Abstract

PURPOSE:To support a car room in no contact with a car frame and prevent the car room from vibration for improving riding quality by providing a plurality of sets of electromagnetic coils corresponding respectively in the car room and frame so that electromagnetic forces act between the electromagnetic coils. CONSTITUTION:A plurality of pair sets of primary and secondary coils 7, 8 are mounted between a car room 1 and car frame 2 so that the car room 1 has longitudinal and lateral repulsion. A gap sensor 10 is mounted between the car room 1 and car frame 2 to detect the displacement of the car room 1 and car frame 2. The weight and uneven load of a passenger is detected on the basis of the current of the coil and the output of the gap sensor 10 and the detecting data are inputted to a control board 9 through a tail cord 11. The weight together with the current values of the electromagnetic coils 7, 8 is calculated by the control board 9 and the current value of the coil is changed to change an apparent spring constant between both coils 7, 8 and give no resonance point during traveling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator car vibration isolator and its control.

[0002]

2. Description of the Related Art A conventional car vibration isolator will be described with reference to FIG.

Conventionally, among various vibration isolator devices for an elevator, a car floor vibration isolator 3, which is located between a car room 1 and a car frame 2,
The car-chamber steady rest 4 is made of rubber or a spring or a combination thereof, and is provided with a hoist for raising and lowering the car frame 2 or a guide rail for guiding the car frame 2 provided in the hoistway, a main rope 5, and a hitch spring. The vibrations generated and transmitted by 6 etc. have been prevented or mitigated.

[0004]

According to the conventional method,
A contact part is generated from the vibration source such as a rail or hoist to the cab, and the vibration transmission path due to the contact (solid propagation)
It was difficult to cut off. Further, although it is possible to easily suppress the high frequency by the conventional contact type vibration damping device, it is difficult to reduce the resonance phenomenon due to the low frequency or the low frequency component below the resonance point.

Further, since the spring and rubber are mechanical systems, it is difficult to change the spring constant once they are attached, and there is a tendency that the riding comfort is deteriorated due to the change of the resonance point due to the change of the load.

An object of the present invention is to obtain a non-contact type vibration damping device that solves the above problems, load detection using the vibration damping device, and a car equipped with these control devices.

[0007]

In order to achieve the above object, the present invention provides an electromagnetic coil 7 between a car frame 2 and a car room 1.
And at least one set of electromagnetic coils consisting of an electromagnetic coil 8 are attached around the car frame 2 and the car room 1, and the car room 1 is levitated by the repulsive force between the electromagnetic coil 7 and the electromagnetic coil 8 to make a non-contact car. Support and anti-vibration device.

Further, the change in weight due to the increase or decrease of passengers is detected by the change in the gap between the car room 1 and the car frame 2 and the change in the current and voltage of the electromagnetic coils 7 and 8, so that the control device 5 has a low vibration. To prevent the ride quality from deteriorating due to the resonance phenomenon of the spring-mass system.

[0009]

With this structure, the cab can be insulated from all contact vibration transmission paths. Further, the load is detected by the amount of displacement from the car frame of the cab and the current value of the electromagnetic coil, and the apparent spring constant of the electromagnetic coil supporting the cab is changed by controlling the electromagnetic force of the electromagnetic coil.
This avoids a change in resonance point due to an increase or decrease in passengers and a reduction in riding comfort due to a running pattern.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on the embodiment shown in FIG.

The car room 1 is supported by a car frame 2.
That is, the primary coils 7 and 2 are provided between the car room 1 and the car frame 2.
The following coils 8 are respectively paired with the car room 1 and the car frame 2, and a plurality of sets are attached so that the car rooms have a repulsive force in front, rear, left and right.

A gap sensor 10 is mounted between the car room 1 and the car frame 2 to detect the displacement of the car room 1 and the car frame 2. The weight of the passenger and the unbalanced load are detected from the coil current and the output from the gap sensor 10 to detect the tail cord 11
Via the control panel 9 for controlling the electromagnetic coil.

On the car frame 2, a main rope 5 and a hitch spring 6 for vibration-proof connection of the main rope 5 and the car frame 2 are attached. Also, a speaker that informs passengers when the load exceeds the rating 1
2 is provided.

A spring 14 is installed between the car frame 2 and the car room 1 so as not to damage the coils 7 and 8 even when the power of the electromagnetic coil is turned off when the car is stopped due to a power failure or long waiting for passengers. . The spring 14 is attached to the cab 1 so as not to come into contact with the car frame 2 when the electromagnetic coils 7 and 8 are operating.

When passengers get on the car, the car room 1 is displaced.
The displacement amount is detected by the gap sensor 10, and the weight is calculated by the control panel 9 together with the current values of the electromagnetic coils 7 and 8. By changing the current value of the coil based on this, 1
The apparent spring constant between the secondary coil 7 and the secondary coil 8 is changed so that there is no resonance point during traveling. Further, if the rated load is exceeded by the weight calculation based on the displacement amount of the cab and the current value of the coil, the speaker 12 announces that passengers will not get on the load.

With this configuration, the car room and the car frame are not in contact with each other, and it is possible to eliminate the source of vibration from solid transmission to the car room. Also, in the case of vibration isolation by a mechanical system such as a spring, it is very difficult to have a structure that changes the spring constant by changing the load, but a magnetic isolation device such as an electromagnetic coil uses a control circuit to actively activate the spring constant. The vibration of the car can be positively reduced by the electromagnetic coils provided on the front, rear, left, right and up and down of the car room.

Further, since the supporting device itself by the electromagnetic coil serves as a load detecting device, the conventional load detector is unnecessary. Recently, attempts have been made to avoid the propagation of solid vibrations by a self-propelled type. However, according to the present invention, this can be done relatively easily, and it is not necessary to significantly change the conventional mechanism.

Another embodiment of the present invention: The car frame 2 and the car room 1 are provided with vibrometers 13 and 13 so that the phase and level of the vibration of the car frame 2 can be moved in the opposite manner to that of the car room. By changing and controlling the current values of the coils 7 and 8, the car frame can bend the rails and the hoist,
Even if it receives vibrations from the rope, the cab can travel in the hoistway without displacement.

[0019]

According to the present invention, the apparent spring constant between the cabs of the cab can be actively activated to avoid the resonance point, and an elevator having a comfortable ride can be obtained.

[Brief description of drawings]

FIG. 1 is a front view of an elevator car according to the present invention,

FIG. 2 is a front view of a conventional elevator car.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Car room 2 ... Car frame 3 ... Car floor anti-vibration device 4 ... Car room steady rest 7, 8 ... Electromagnetic coil 9 ... Control panel 10 ... Gap sensor

Claims (4)

[Claims] 1. An anti-vibration device for an elevator car for vibration-proofing a car room against a car frame, wherein a plurality of sets of electromagnetic coils corresponding to the car room and the car frame are provided, and an electromagnetic coil is provided between the electromagnetic coils. An anti-vibration device for an elevator car, which applies force to support and vibration-proof the cab without contacting the car frame. 2. A vibration isolator for an elevator car according to claim 1, wherein a car load is detected by an interaction force between the electromagnetic coils. 3. An electromagnetic coil control circuit for avoiding the resonance phenomenon of the electromagnetic coil due to a change in a car load, and a control device for maintaining a constant riding comfort in response to a change in a load condition. The vibration isolation device for an elevator car according to Item 2. 4. An anti-vibration device for an elevator car for supporting a car room against vibrations of a car frame, wherein a plurality of sets of electromagnetic coils corresponding to the car room and the car frame are provided, and an electromagnetic coil is provided between the electromagnetic coils. A vibrometer that applies a force to support the car room in a non-contact manner with respect to the car frame, and sets the phase and level of vibration of each of the car frame and the car room in the car frame and the car room, respectively. Detected by
An anti-vibration device for an elevator car, comprising a control circuit for controlling the current value of the electromagnetic coil so as to cancel out the two by making them move in opposite directions.