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Vibration control apparatus for elevator

  • US 5,811,743 A
  • Filed: 08/03/1995
  • Issued: 09/22/1998
  • Est. Priority Date: 10/07/1993
  • Status: Expired due to Fees
First Claim
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1. In an elevator having guide rails installed in an elevator passage and a guide unit arranged on the top and bottom of a passenger car of the elevator, the guide unit having a rocking lever attached to the passenger car, a guide roller rotatably attached to the lever, and a spring for pressing the guide roller against the guide rail so that the guide roller may roll along the guide rail, a vibration control apparatus comprising a servomotor arranged on one of the top and bottom of the passenger car of the elevator, a translation mechanism driven by said servomotor, for converting rotational motion into linear motion, a weight to be linearly horizontally moved by said translation mechanism, a vibration sensor for detecting transverse vibration of the passenger car, and a controller for driving said servomotor according to a signal from said vibration sensor, to let said weight linearly horizontally move to produce inertial force in a direction to cancel the transverse vibration of the passenger car.

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