JPH01159700U

JPH01159700U -

Info

Publication number: JPH01159700U
Application number: JP5600188U
Authority: JP
Priority date: 1988-04-27
Filing date: 1988-04-27
Publication date: 1989-11-06

Description

[Brief explanation of the drawing]

第１図に本考案の実施例を示す回路図、第２図
、第３図、第４図は動作説明図、第５図は従来例
の説明図である。１０，１１は左右フオーク、１２，１３は左右
シフトシリンダ、１４はポンプ、１５，１６，１
７は第１、第２、第３切換弁、１８，１９，２０
，２１，２２，２３は第１、第２、第３、第４、
第５、第６路、２４，２５，２６は第７、第８、
第９路、２７はタンク。 FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIGS. 2, 3, and 4 are diagrams for explaining the operation, and FIG. 5 is a diagram for explaining the conventional example. 10, 11 are left and right forks, 12, 13 are left and right shift cylinders, 14 is a pump, 15, 16, 1
7 is the first, second, third switching valve, 18, 19, 20
, 21, 22, 23 are the first, second, third, fourth,
5th, 6th, 24, 25, 26 are 7th, 8th,
Route 9, 27 is a tank.

Claims

[Scope of utility model registration request]

Second chambers 12b, 13 of left and right shift cylinders 12, 13 that move left and right forks 10, 11 left and right
b, connect the seventh passage 24 to the left shift cylinder 12
While connecting the eighth passage 25 to the first chamber 12a of
The ninth passage 2 is connected to the first chamber 13a of the right shift cylinder 13.
6, and the seventh path 24 is connected to the first path 18 and the fifth path 24.
It branches into Route 22, and Route 8 25 is connected to Route 2 19 and Route 4.
It branches into Route 21, and Route 9 26 becomes Route 3 20 and Route 6.
It branches into a road 23, and the first road 18 and the second road
A first switching valve 15 connects and disconnects the passage 19 to the pump 14 and the tank 27, a second switching valve 16 connects and disconnects the third passage 20 and the fourth passage 21 to the pump 14 and the tank 27, and the fifth passage 22 and the A fork operating device for a forklift, characterized in that a third switching valve 17 is provided to communicate and cut off six passages 23 to a pump 14 and a tank 27.