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Title:
HOISTING MACHINE AND OVERLOAD DETECTION METHOD FOR HOISTING MACHINE
Document Type and Number:
WIPO Patent Application WO/2019/003469
Kind Code:
A1
Abstract:
Provided is a hoisting machine that allows safe operation by preventing damage to the hoisting machine due to the hoisting machine continuing to perform hoisting operations in an overloaded state. This hoisting machine has an electric motor that performs a raising or lowering operation on a suspended load and a control means that controls the electric motor, and is characterized in that: a first prescribed position is stored in a storage means in advance; an overload determination means is provided to identify an overloaded state during lifting operation; and when an overloaded state has been identified, raising operations are prohibited and the lowering operation is performed to the first prescribed position.

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Inventors:
TAGAMI TATSUYA (JP)
OIKAWA YUGO (JP)
Application Number:
PCT/JP2017/044752
Publication Date:
January 03, 2019
Filing Date:
December 13, 2017
Export Citation:
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Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
B66D1/58; B66D3/20
Foreign References:
JPS58106394U1983-07-20
JPS5684592U1981-07-07
JPH11209081A1999-08-03
JP2013147333A2013-08-01
JP2012066893A2012-04-05
Attorney, Agent or Firm:
SEIRYO I.P.C. (JP)
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