Title:
FRONT CONTROLLER OF HYDRAULIC SHOVEL
Document Type and Number:
Japanese Patent JP2793953
Kind Code:
B2
Abstract:
PURPOSE: To decrease the frequency of moving a bucket automatically stopped in an interference dangerous region to the outside of the interference dangerous region and to promote controllability.
CONSTITUTION: A first interference dangerous region Z1 is not set around the lower part of an operation room 2a, it is set only around the upper part thereof, and when a bucket 6 enters the first interference dangerous region Z1, after an interference prevention device calculates the front end co-ordinate of the bucket 6 based on relative angle signals 1, 2 and 3 from a boom angle sensor 12, an offset angle sensor 13 and an arm angle sensor 14, change-over signals stopping drive of cylinders 8, 9, 10 and 11 are outputted to a hydraulic driving circuit 21. The bucket 6 is automatically stopped in the first interference dangerous region Z1, Interference of the bucket 6 with the upper part of the operation room 2a is mechanically prevented by a notch 2b formed in the operation room 2a.
Inventors:
NASU KATSUYOSHI
NISHIMURA KOJI
YAMADA OSAMICHI
SHIMAZAKI AKINORI
MATSUDA TAKASHI
NISHIMURA KOJI
YAMADA OSAMICHI
SHIMAZAKI AKINORI
MATSUDA TAKASHI
Application Number:
JP25427793A
Publication Date:
September 03, 1998
Filing Date:
October 12, 1993
Export Citation:
Assignee:
HITACHI KENKI KK
International Classes:
E02F3/43; E02F9/20; E02F9/24; (IPC1-7): E02F9/24; E02F3/43
Domestic Patent References:
| JP5272154A | ||||
| JP3217523A | ||||
| JP4333730A | ||||
| JP4254625A | ||||
| JP455530A |
Attorney, Agent or Firm:
Kenjiro Take (1 person outside)
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