Title:
LIFTING MAGNET WORK MACHINE
Document Type and Number:
Japanese Patent JP2021050094
Kind Code:
A
Abstract:
To provide a lifting magnet work machine that can appropriately adjust the magnetic force of the lifting magnet according to the work content, while preventing erroneous setting of the work mode due to this operation without requiring complicated mode switching operation.SOLUTION: The working height calculation unit 32 calculates the working height H of the lifting magnet 9 based on the operating angles of the boom 7 and the arm 8. The work content determination unit 33 determines the work content to be done by the lifting magnet 9 based on the work height H and the turning operation pressure P. When a condition 1 in which the work height of H is equal to 2 m or less is satisfied, it is considered as scrap trimming work. When a condition 2 in which the working height H is equal to 2 m or more and turning operation pressure P is equal to 2 MPa or less is satisfied, it is considered as weight adjustment work. For work other than those above, the lifting magnet is excited based on the rated value. In the case of scrap trimming work or weight adjustment work, excitation is done based on a limit value lower than the rated value.SELECTED DRAWING: Figure 3
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Inventors:
FUKUDA FUMIKI
Application Number:
JP2019175884A
Publication Date:
April 01, 2021
Filing Date:
September 26, 2019
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
B66C1/06; B66C1/08; E02F3/36
Attorney, Agent or Firm:
Koji Nagato