Title:
WORKING RANGE LIMITING CONTROL DEVICE FOR CONSTRUCTION MACHINE
Document Type and Number:
Japanese Patent JP3455359
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a working range limiting control device having the capability of allowing a sufficient excavation work until a time immediately before the entry of a front device in an ingress prohibiting zone under the prevention of the entry of the device therein, regardless of a work environmental condition.
SOLUTION: The arithmetic operation part of a control unit 9 computes an instruction current value for deceleration control, and outputs the result of the computation to proportional solenoid valves 10a to 11b. Then, when a selector monitor point approaches to an ingress prohibiting zone, a front device is decelerated and stopped, upon the arrival thereof at the prohibiting zone. In this case, a deceleration control operation part corrects a deceleration distance preliminarily stored in the control unit 9, on the basis of a detection signal from an oil temperature sensor, and computes a corrected deceleration distance, thereby making judgement as to whether the selector monitor point is within a corrected deceleration zone.
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Inventors:
Masakazu Haga
Hiroshi Watanabe
Kazuo Fujishima
Hiroshi Watanabe
Kazuo Fujishima
Application Number:
JP6486096A
Publication Date:
October 14, 2003
Filing Date:
March 21, 1996
Export Citation:
Assignee:
Hitachi Construction Machinery Co., Ltd.
International Classes:
E02F3/43; E02F9/20; E02F9/24; (IPC1-7): E02F3/43; E02F9/24
Domestic Patent References:
| JP835239A | ||||
| JP6146326A |
Attorney, Agent or Firm:
Kasuga
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