Title:
SAFETY DEVICE FOR BOOM TYPE WORKING VEHICLE
Document Type and Number:
Japanese Patent JP3712558
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a safety device for boom type working vehicle assuring a high safety without risk that the vehicle body tumbles even in the case the vehicle runs on an up-slope, steps, etc., in the condition that a boom is elongated or allowed to rise or fall to a great extent.
SOLUTION: A controller 40 operates a boom by driving actuator valves 51-53 in accordance with the manipulation of a boom operating lever 21 and runs a runner body by driving actuator valves 54a and 54b in compliance with the manipulation of a crawler device actuating lever 23. Sensing is made to judge whether the boom rising/falling angle sensed by a rise/fall angle sensor 31 lies over the reference value set previously or whether the boom length sensed by a length sensor 32 lies over the reference length set previously, and the running of the runner body is prohibited if the inclining angle of the runner body sensed by an inclining angle sensor 34 exceeds the reference value predetermined. Also rise, facing up, and elongation of the boom are prohibited.
Inventors:
Norihisa Takahashi
Application Number:
JP7490699A
Publication Date:
November 02, 2005
Filing Date:
March 19, 1999
Export Citation:
Assignee:
Aichi Corporation
International Classes:
B66F9/24; B66F11/04; (IPC1-7): B66F9/24; B66F11/04
Domestic Patent References:
| JP4014297U | ||||
| JP9067090A | ||||
| JP5069090U | ||||
| JP61078198U |
Attorney, Agent or Firm:
Masago Onishi