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AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKenji Utsunomiya, Kenichi Okamoto, Takashi Yumura
Estimating the term…
A vibration reduction apparatus for an elevator includes acceleration sensors 61, 62 for detecting vibrations of a car, controllers 90a, 90b for calculating forces to be applied to the car based on signals of the acceleration sensors, and actuators 81-84 for applying forces to the car in accordance with the calculation result of the controller. A dead band filter 102, which has a prescribed dead band region corresponding to a noise level of the acceleration sensors, and an integrator 92, which integrates the signals of the acceleration sensors after having passed through the dead band filter, are provided in the acceleration sensors 61, 62, or in the controllers 90a, 90b, or between them.
A vibration reduction apparatus for an elevator including:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
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Riding means, e.g. Shoes, Rollers, between car and guiding means, e.g. rails, ropes: rollers
Including active attenuation system for shocks, vibrations: with rollers, shoes
Attenuation system for shocks, vibrations, imbalance, e.g. passengers on the same side: active systems
Elevators
Term end not estimated
This invention relates to a vibration reduction apparatus for an elevator which is capable of suppressing the vibrations of a car in an elevator.
FIG. 9 is a view showing the configuration of a known vibration reduction apparatus for an elevator disclosed in Japanese Patent Application Laid-Open No. 8-26624 for instance. An elevator cage 1 installed on a cage frame 2 is engaged with a pair of rails 41, 42 on opposite sides of the cage frame 2 through guide devices 51-54 mounted thereon, so that an elevator is driven to move up and down along the rails 41, 42 by moving a wire rope (not shown) hanging the cage frame 2 in a vertical direction by means of a winch (not shown).
The guide devices 51-54 are arranged at four corners on the opposite upper and lower sides of the cage frame 2. The guide devices 51-54 are provided with guide rollers 71-74 and actuators 81-84, respectively, which act as vibration reducers for suppressing the vibrations of the car. The actuators 81-84 may be in the form of contactless actuators which are constituted by electromagnets, etc.
FIG. 1 is a view showing the configuration of a vibration reduction apparatus for an elevator according to one embodiment of the present invention;
FIG. 2 is a block diagram showing the circuit structure of a controller in a first embodiment of the present invention;
FIG. 3 is a view showing the input-output characteristic of a dead band filter according to the present invention;
Embodiment 1.
FIG. 1 is a view which shows the configuration of a vibration reduction apparatus for an elevator according to one embodiment of the present invention. The same or corresponding parts of this embodiment as those in the known apparatus are identified by the same symbols, while omitting an explanation thereof. 90 designates a controller which is comprised of control units 90a, 90b of the same configuration according to the present invention, and the other parts of this embodiment are basically the same as those in the known apparatus. It is to be noted that a car generally includes an elevator cage 1 and a cage frame 2.
FIG. 2 is a block diagram which shows the circuit structure of the control units 90a, 90b of the controller 90, which is an essential portion of the first embodiment of the present invention. In FIG. 2, 101 designates a band-pass filter; 102 a dead band filter; 92 an integrator; 91 a gain regulator; 103 a high-pass filter; and 93 a current amplifier.