Title:
DEVICE FOR STOPPING EXPANSION OF JACK OF HEAVY MACHINERY CARRYING VEHICLE AND THE LIKE
Document Type and Number:
Japanese Patent JPH1159347
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce the burden of an operator by stopping the expansion of jack devices automatically when a rear stay is grounded. SOLUTION: In a heavy machinery carrying vehicle, etc., having jack devices on both the right and left sides of the front of the platform of its vehicle body and a rear stay at the rear of the vehicle body, and loading and unloading heavy machinery by tilting the vehicle body backward through the expansion of the jack devices and grounding the rear stay, an expansion oil passage 21 and a contraction oil passage 22 are connected, respectively, to the expansion chambers 18R, 18L and contraction chambers 19R, 19L of the expansion/ contraction cylinders 9R, 9L of the jack devices on the right and left sides via an expansion/contraction solenoid valve 20 switched by an expansion/ contraction switch, and a ground detecting switch which is turned off when the grounding of the rear stay is detected is provided between the expansion/ contraction switch and a solenoid SOL 20a located on the expansion side of the expansion/contraction solenoid valve 20.
Inventors:
MATSUDO SHIGEO
IIZUKA SHIZUYASU
IIZUKA SHIZUYASU
Application Number:
JP23145797A
Publication Date:
March 02, 1999
Filing Date:
August 27, 1997
Export Citation:
Assignee:
FURUKAWA CO LTD
International Classes:
B60S9/10; (IPC1-7): B60S9/10
Attorney, Agent or Firm:
Tetsuya Mori (4 others)
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