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Patent Searching and Data


Title:
WORK MACHINERY
Document Type and Number:
WIPO Patent Application WO/2017/203845
Kind Code:
A1
Abstract:
A hydraulic excavator is provided with a controller (40) that executes area limiting control in which a boom (8) is forcibly raised so that the distal end of a bucket remains on a face to be excavated and in an area above same when an operation instruction is given to an arm (9) or a bucket (10) by an operation device (45b, 46a). When the distal end of the bucket is located below the face to be excavated, the controller determines whether to select a first mode or a second mode that is regulated to a slower speed than the first mode as a control mode for the speed of raising the boom when executing area limiting control, and controls the speed of raising the boom on the basis of the determination results.

Inventors:
NARIKAWA Ryu (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
EDAMURA Manabu (HITACHI CONSTRUCTION MACHINERY CO. LTD., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
ISHIKAWA Kouji (HITACHI CONSTRUCTION MACHINERY CO. LTD., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
IZUMI Shiho (HITACHI CONSTRUCTION MACHINERY CO. LTD., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
Application Number:
JP2017/014267
Publication Date:
November 30, 2017
Filing Date:
April 05, 2017
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACHINERY CO., LTD. (16-1, Higashiueno 2-chome Taito-k, Tokyo 15, 〒1100015, JP)
International Classes:
E02F3/43; E02F9/20
Domestic Patent References:
2015-02-26
Foreign References:
JP5706050B12015-04-22
Attorney, Agent or Firm:
KAICHI IP (3-16, Nihonbashi-muromachi 4-chome Chuo-k, Tokyo 22, 〒1030022, JP)
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