JP2010018373A - Rope vibration control device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rope vibration control device of an elevator capable of effectively suppressing resonance of a long object without coming into contact with the long object. <P>SOLUTION: In this vibration control device of the elevator installed with the long object 5 in a hoistway, vibration suppressing means for suppressing vibration of the long object 5 without coming into contact with the long object 5 according to a seismic signal, such as a blower 12a1 and electromagnet 12a2, are provided. By installing the vibration suppression means at a fastener or an intermediate beam at different positions in the hoistway, vibration control is performed at each position suitable for a natural frequency of the long object 5 to effectively suppress resonance. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rope damping device for an elevator that suppresses the swing of a long object made of a magnetic material disposed in a hoistway.

  In recent years, the natural frequency of buildings has been decreasing with the rise of buildings. Further, the natural frequency of a long object made of a magnetic material disposed in the hoistway, for example, the main rope, the compen- sion rope and the governor rope, is determined by the length, mass and tension of the rope. As a result, when the car is traveling, the natural frequency of the rope may approach or match the natural frequency of the building. In particular, when the building is shaken by an earthquake, when the natural frequency of the rope approaches the natural frequency of the building, the swing of the rope increases, and the rope collides with the equipment and protrusions in the hoistway or becomes tangled. there is a possibility. When such an abnormality is detected, the car stops and a passenger is trapped in the car.

For this reason, conventionally, the main rope is fixed to the car frame and the main rope is inserted, and a vibration suppression device having a viscoelastic body and a damper is provided so as to suppress the vibration of the main rope when a strong wind or an earthquake occurs. Have been proposed (see, for example, Patent Document 1).
Japanese Patent Laying-Open No. 2006-193256 (paragraph numbers 0022 to 0028, FIG. 2)

  However, since the above-mentioned conventional one suppresses the vibration by sliding the rope on the vibration suppressing device, it is necessary to increase the frequency of maintenance while affecting the life of the rope and the vibration suppressing device. There was a problem.

  Further, the conventional one has a problem that the installation place of the vibration suppression device is limited to the car frame, and it is difficult to effectively suppress the vibration corresponding to the natural frequency of the rope that changes every moment. In addition, there are a plurality of types of ropes in an elevator, that is, main ropes, compensation ropes, and governor ropes, and it is important to perform vibration damping at a position suitable for the natural frequency of each rope. In particular, in recent earthquakes, elevator ropes resonated with ground motion, causing accidents such as damage or breakage due to collision with surrounding equipment, or operation stoppage. It has been found that the main factor was long-period ground motion. Therefore, it is also important for preventing accidents that the natural frequency of the rope approaches the natural frequency of the building due to such long-period ground motion, that is, avoiding resonance.

  The present invention was made from the above-described prior art, and its purpose is to provide an elevator rope vibration damping device that can effectively suppress resonance of a long object without contacting the long object. There is to do.

  In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is an elevator vibration control device in which a long object is installed in a hoistway, according to a seismic motion signal without contacting the long object. The present invention is characterized in that a shake suppressing means for suppressing the shake of the long object is provided.

  In the invention according to claim 1 of the present invention configured as described above, the shake suppressing means applies a force so as to stabilize the long object in a non-contact manner according to the earthquake motion signal, and suppresses resonance of the long object.

  Further, the invention according to claim 2 of the present invention is characterized in that the shake suppression means comprises a blower.

  In the invention according to the second aspect of the present invention configured as described above, the shake suppression means includes a blower, and suppresses the shake of a long object by the wind pressure sent from the blower. As a result, the shake can be suppressed without contacting a long object.

  Furthermore, the invention according to claim 3 of the present invention is characterized in that the long object is made of a magnetic material, and the shake suppressing means is made of an electromagnet.

  In the invention according to claim 3 of the present invention configured as described above, the shake suppressing means is made of an electromagnet, and the shake of a long object made of a magnetic material is suppressed by the magnetic force of the electromagnet. As a result, the shake can be suppressed without contacting a long object.

  Furthermore, the invention according to claim 4 of the present invention is characterized in that the shake suppressing means is installed on a fastener or an intermediate beam in a hoistway.

  In the invention according to claim 4 of the present invention configured as described above, since the vibration suppressing means is installed in the fastener or the intermediate beam at different height positions in the hoistway, each long object is unique. Vibration suppression can be performed at a position suitable for the frequency.

  According to the present invention, since vibration can be suppressed without contacting a long object, an elevator with high reliability and safety can be realized without deteriorating the life of the device or maintenance. In addition, by suppressing vibration at a position suitable for the natural frequency of the long object, it effectively acts on long-period ground motion to suppress resonance of the long object, and the long object is in the hoistway. It is possible to more reliably prevent the device from colliding with or tangling the device.

  Embodiments of an elevator vibration damping device according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a cross-sectional view showing an embodiment of an elevator rope damping device according to the present invention, FIG. 2 is a perspective view showing details in the vicinity of section A in FIG. 1, and FIG. FIG.

  As shown in FIG. 1, the elevator has a car 3 and a counterweight 4 that move up and down a hoistway 2 formed in the building 1, and both ends are attached to the top of the hoistway 2, and the car 3 and the counterbalance at an intermediate portion. A main rope 5 that supports the weight 4 and is made of a magnetic material; a hoisting machine 6 that is installed in the lower part of the hoistway 2 and drives the main rope 5; and conversion pulleys 7 and 8 that are attached to the top of the hoistway 2; A fastener 9 provided at a different height in the hoistway 2, a seismic detector 10 that detects shaking of the building 1 and outputs an earthquake motion signal, and an emergency earthquake bulletin sent from the outside, And an earthquake early warning receiver 11 that outputs an earthquake motion signal.

  The elevator rope damping device of the present embodiment suppresses the swing of the main rope 5 without touching the main rope 5 in accordance with the seismic motion signal output from the earthquake detector 10 or the earthquake early warning receiver 11. Suppression means 12 is provided. That is, a swing restraining means 12a for suppressing the swing of the main rope 5 on the car 1 side on the predetermined fastener 9a, and a swing suppressing means 12b for suppressing the swing of the main rope 5 on the counterweight 4 side on the predetermined fastener 9b. And are installed. As shown in FIG. 2, for example, the vibration suppressing means 12a includes two blowers 12a1 and one electromagnet 12a2 installed on a mounting plate 13 supported by the fastener 9a. Although details of the shake suppression means 12b are not shown, they are composed of a blower and an electromagnet, similar to the shake suppression means 12a. Further, in the elevator according to the present embodiment, from the length, mass and tension of the rope, the main rope 5 on the car 1 side is at a height below the intermediate floor, and the natural frequency of the rope is unique to the building 1. The vibration suppression means 12a is installed on the fastener 9a located below the intermediate floor because it approaches the frequency most closely, and the main rope 5 on the counterweight 4 side is at the height above the intermediate floor and is unique to the rope. Since the vibration frequency is closest to the natural frequency of the building 1, the vibration suppression means 12b is installed on the fastener 9b located above the intermediate floor.

  In the present embodiment, when the earthquake detector 10 detects the shaking of the building 1 and outputs an earthquake motion signal, or the earthquake early warning receiver 11 receives an emergency earthquake bulletin sent from the outside, When the signal is output, the shake suppressing means 12 is activated. That is, as shown in FIG. 3, the blower 12a1 operates, and the wind pressure presses the main rope 5 in the direction away from the shake suppressing means 12a, magnetizes the electromagnet 12a2, and the main rope 5 is shaken suppressed by the magnetic force. Pull in the direction approaching 12a. When these opposing forces act on the main rope 5, the main rope 5 stays at a predetermined position regardless of the earthquake motion, and the shaking is suppressed.

  According to the present embodiment, since vibration can be suppressed without contacting the main rope 5, an elevator with high reliability and safety can be realized without deteriorating the life of the equipment or maintenance. Further, by performing vibration suppression at a position suitable for the natural frequency of the main rope 5, it effectively acts on long-period ground motion and suppresses the resonance of the main rope 5. It is possible to more reliably prevent the device from colliding with or being entangled with the device or protrusion inside.

  FIG. 4 is a view corresponding to FIG. 3 showing another embodiment of the elevator rope damping device according to the present invention. In addition, the same code | symbol is attached | subjected to the thing equivalent to what was mentioned above.

  In the elevator rope damping device of another embodiment, as shown in FIG. 4, the vibration suppressing means 12 is opposed to the blower 12 c provided on one side of the main rope 5, the blower 12 c and the main rope 5. It consists of a blower 12d.

  In another embodiment, when the earthquake detector 10 detects the shaking of the building 1 and outputs an earthquake motion signal, or the earthquake early warning receiving device 11 receives an emergency earthquake early warning sent from the outside, When the seismic motion signal is output, the fans 12c and 12d are actuated, and the main rope 5 is pressed away from the fan 12c by the wind pressure of the fan 12c, and the main rope 5 is pressed away from the fan 12d by the wind pressure of the fan 12d. Is done. When these opposing forces act on the main rope 5, the main rope 5 stays at a predetermined position regardless of the earthquake motion, and the shaking is suppressed.

  In each of the above-described embodiments, the main rope 5 of the elevator has been described as an example. However, as described above, the natural frequency of the rope is determined by its length, mass, and tension, and the elevator has other types. Since the rope, that is, the compen- sion rope and the governor rope, are provided, the vibration can be effectively suppressed by installing the vibration suppressing means at a position most suitable for the rope to be controlled. Moreover, although the example which installed the vibration suppression means 12 in the fastener 9 was shown, this invention is not restricted to this, You may install the vibration suppression means in an intermediate beam.

It is sectional drawing which shows one Embodiment of the rope damping device of the elevator which concerns on this invention. It is a perspective view which shows the A vicinity vicinity detail of FIG. It is explanatory drawing explaining the operation state of a shake suppression means. It is the FIG. 3 equivalent view which shows other embodiment of the rope damping device of the elevator which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 2 Hoistway 3 Passenger car 4 Balance weight 5 Main rope 6 Hoisting machine 7, 8 Conversion pulley 9 Fastener 10 Seismic detector 11 Earthquake early warning receiver 12 Shake suppression means 12a1, 12c, 12d Blower 12a2 Electromagnet 13 Mounting plate

Claims (4)

In the elevator rope damping device where long objects are installed in the hoistway,
A rope damping device for an elevator, comprising a vibration suppression unit that suppresses a vibration of a long object without contacting the long object in response to an earthquake motion signal.   The elevator vibration damping device for an elevator according to claim 1, wherein the vibration suppression means comprises a blower.   The elevator rope damping device according to claim 1, wherein the long object is made of a magnetic material, and the shake suppressing means is made of an electromagnet.   The elevator vibration damping device for an elevator according to claim 1, wherein the vibration suppression means is installed on a fastener or an intermediate beam in a hoistway.

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