Title:
ELEVATOR SYSTEM
Document Type and Number:
Japanese Patent JP2016020246
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an elevator system, which can eliminate a phase difference between two encoders without requiring a conversion cable.SOLUTION: The elevator system is equipped with: a car 2; a balance weight 3; a main rope 4 that connects the car 2 to the balance weight 3; a hoisting machine 5 that is arranged on an upper part of a hoistway 1 and drives the main rope 4; a speed governor 6 that has a speed-governor rope 6b and speed governor pulleys 6c and 6d; and a control device 7. In a rotary shaft of the speed governor pulley 6d is arranged a speed governor encoder 8, and in a rotary shaft of the hoisting machine 5 is arranged a motor encoder 9. The control device 7 includes a first calculating portion 7a that performs calculation processing on the basis of a first signal to be outputted from the speed governor encoder 8 and a second calculating portion 7b that performs calculation processing on the basis of a second signal to be outputted from the motor encoder 9; and also has a function for comparing a phase of the first signal with a phase of the second signal; and when the phases are different from each other, outputs a control signal to inverse a rotation direction of the hoisting machine 5.SELECTED DRAWING: Figure 1
Inventors:
KANEDA HIRONORI
YAMAGISHI MASANORI
TOYABE JUN
HOSHINO TAKAMICHI
SUGIYAMA YOHEI
IWAMOTO AKIRA
TAGO MASAHIRO
YAMAGISHI MASANORI
TOYABE JUN
HOSHINO TAKAMICHI
SUGIYAMA YOHEI
IWAMOTO AKIRA
TAGO MASAHIRO
Application Number:
JP2014143775A
Publication Date:
February 04, 2016
Filing Date:
July 14, 2014
Export Citation:
Assignee:
HITACHI LTD
International Classes:
B66B3/02
Attorney, Agent or Firm:
Polaire Patent Business Corporation
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