JPH0382388U

JPH0382388U -

Info

Publication number: JPH0382388U
Application number: JP14462189U
Authority: JP
Priority date: 1989-12-15
Filing date: 1989-12-15
Publication date: 1991-08-22

Description

[Brief explanation of the drawing]

第１図は本考案を採用したトラツククレーンの
全体側面図、第２図は同平面図、第３図は本考案
に係る油圧回路図である。１…上部旋回体、２…下部走行体、３…アウト
リガ、４…前部主ジヤツキ、５…後部主ジヤツキ
、６…フロントジヤツキ、７…リヤジヤツキ、８
…油圧ポンプ、９，１２…電磁切換弁、１０，１
３…電磁切換弁。 FIG. 1 is an overall side view of a truck crane employing the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a hydraulic circuit diagram according to the present invention. 1...Upper rotating body, 2...Lower traveling body, 3...Outrigger, 4...Front main jack, 5...Rear main jack, 6...Front jack, 7...Rear jack, 8
...Hydraulic pump, 9,12...Solenoid switching valve, 10,1
3...Solenoid switching valve.

Claims

[Scope of Claim for Utility Model Registration] 1. Two front main jacks 4 each disposed on both left and right sides of the lower traveling body 2 at a predetermined interval in the front and rear,
4 and rear main jacks 5, 5, and a front jack 6 is attached to the front end of the lower traveling body 2. A switching valve 9, 10 is provided between the front main jacks 4, 4.
A hydraulic jack control device for a truck crane, characterized in that when the front jack 6 is retracted, the front jack 6 is also retracted at the same time. 2. Two front main jacks 4 each disposed at a predetermined interval in the front and rear on both the left and right sides of the lower traveling body 2,
4 and rear main jacks 5, 5, and a rear jack 7 is attached to the rear end of the lower traveling body 2, a switching valve is provided between the hydraulic power source 8 and the rear main jacks 5, 5 and rear jack 7. 12 and 13, and when the rear main jacks 5, 5 are retracted, the rear jack 7 is also retracted at the same time. 3. Two front main jacks 4 each disposed at a predetermined interval in the front and rear on both left and right sides of the lower traveling body 2,
4 and rear main jacks 5, 5, and is equipped with a front jack 6 and a rear jack 7 at the front end and rear end of the lower traveling body 2, respectively. Switching valves 9 and 10 are provided between the front jack 6 and switching valves 12 and 13 are provided between the hydraulic power source 8 and the rear main jacks 5 and 5 and the rear jack 7. A hydraulic jack for a truck crane, characterized in that when the rear main jacks 5, 5 are retracted, the front jack 6 is also retracted at the same time, and when the rear main jacks 5, 5 are retracted, the rear jack 6 is also retracted at the same time. Control device.