Title:
CONTROL DEVICE FOR ON-VEHICLE CRANE
Document Type and Number:
Japanese Patent JP3232006
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent an outrigger from being operated against operator's will.
SOLUTION: A first and a second branch line 37 and 46 for feeding pressure oil to manual change-over valves 33 and 34 for driving outrigger cylinders 35 and 36, are provided independently from a high pressure line 47 for feeding pressure oil from a pump 31 to manual change-over valves 38 through 41 and electromagnetic change-over valves 61 through 64. An electromagnetic proportional change-over valve 51 allows the pump 31 to feed pressure oil to the first branch line 37 only through an outrigger operating position which is located at the opposite side of a first and a second remote operating position with respect to a manual normal position. Thus as mentioned above, when the electromagnetic proportional change-over valve 51 is switched over to the manual operating position or a remote operating position, if only pressure oil is prevented from being fed to the first branch line 37 from the pump 31, the outrigger is thereby prevented from being operated against operator's will.
Inventors:
Akiyoshi Nagai
Hitoshi Horiuchi
Ryutaro Mizutani
Kazuya Sakagami
Hitoshi Horiuchi
Ryutaro Mizutani
Kazuya Sakagami
Application Number:
JP23495796A
Publication Date:
November 26, 2001
Filing Date:
September 05, 1996
Export Citation:
Assignee:
Daikin Industries, Ltd.
Furukawa Metal Co., Ltd.
Furukawa Metal Co., Ltd.
International Classes:
B66C13/20; B66C23/78; F15B11/16; (IPC1-7): B66C13/20; B66C23/78
Domestic Patent References:
| JP8100805A | ||||
| JP57201435A | ||||
| JP859185A | ||||
| JP220845B2 |
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)