Title:
HYDRAULIC ELEVATOR CONTROL SYSTEM
Document Type and Number:
Japanese Patent JP3284024
Kind Code:
B2
Abstract:
PURPOSE: To save energy and to form into small size by reciprocating oil in an oil pipe connected to each other to lift a car, also decreasing an oil hydraulic pump output by action of a counter weight, so that the car can be driven by the small oil hydraulic pump output.
CONSTITUTION: In a control device 7, an electric motor 6 of driving an oil hydraulic pump 5 and a hydraulic valve 4 are controlled, to determine an amount of oil flowing in/out of jacks 3, 13 respectively of a car 2 and a counter weight 12. The car 2 is connected to the counter weight 12 by a rope through a sheave 1 fixed to a ceiling, to relatively run these car and counter weight. At this running time, oil in the two hydraulic jacks 3, 13 flows in/out of the hydraulic jacks 3, 13 connected to each other by an oil pipe 10 through the hydraulic valve 4. Accordingly, in moving oil, by previously having a pressure of weight amount of the counter weight 12, in a pressure rise by the oil hydraulic pump 5, outputting only a shortage amount relating to hydraulic force, required for lift running the car 2, is only required.
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| WO/1992/021838 | WORK PLATFORM SYSTEM FOR MULTI-STOREY BUILDINGS |
Inventors:
Hideaki Uetake
Kazuhiro Hatano
Kazuhiro Hatano
Application Number:
JP13183095A
Publication Date:
May 20, 2002
Filing Date:
May 30, 1995
Export Citation:
Assignee:
Toshiba IT Control Systems Co., Ltd.
Toshiba Corporation
Toshiba Corporation
International Classes:
B66B9/04; B66B1/04; (IPC1-7): B66B9/04; B66B1/04
Domestic Patent References:
| JP1308383A | ||||
| JP61136889A | ||||
| JP6255952A | ||||
| JP58968A | ||||
| JP54147961U | ||||
| JP5532341U |
Attorney, Agent or Firm:
Hideaki Tokawa (1 outside)
Takehiko Suzue
Takehiko Suzue