JPH0369302U

JPH0369302U -

Info

Publication number: JPH0369302U
Application number: JP12924689U
Authority: JP
Priority date: 1989-11-04
Filing date: 1989-11-04
Publication date: 1991-07-10

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係る液体シリンダ
用同期回路図、第２図は従来の液体シリンダ用同
期回路図である。符号の説明、２１……第１液体シリンダ、２２
……第２液体シリンダ、２３……第１流路、２４
……第２流路、２５……第３流路、２６……第１
切換弁、２７……供給流路、２８……排出流路、
２９……第４流路、３０……第２切換弁、３１…
…チエツク弁、３２……第５流路、３３……リリ
ーフ弁。 FIG. 1 is a synchronous circuit diagram for a liquid cylinder according to an embodiment of the present invention, and FIG. 2 is a diagram of a conventional synchronous circuit for a liquid cylinder. Explanation of symbols, 21...First liquid cylinder, 22
...Second liquid cylinder, 23...First flow path, 24
...Second channel, 25...Third channel, 26...First
switching valve, 27...supply channel, 28...discharge channel,
29... Fourth flow path, 30... Second switching valve, 31...
...Check valve, 32...Fifth flow path, 33...Relief valve.

Claims

[Scope of utility model registration request]

first and second liquid cylinders that communicate the rod-side cylinder chambers with each other via a first flow path; a supply flow path that supplies pressurized liquid to a second flow path that is connected to the head-side cylinder chamber of the first liquid cylinder; A first switch that conducts or shuts off the discharge passages connected to the low pressure side and conducts or shuts off the supply passage and the discharge passage and a third passage connected to the head side cylinder chamber of the second liquid cylinder. a second switching valve that connects or shuts off a fourth flow path branching from the first flow path and the supply flow path and the discharge flow path;
a check valve disposed in the flow path that allows flow from the second switching valve toward the first flow path and blocks flow in the opposite direction; and a fifth flow path that connects the first flow path and the discharge flow path. and a relief valve disposed in the liquid, and the second switching valve is periodically switched and controlled during operation to conduct or cut off the supply flow path and the fourth flow path. Synchronous circuit for cylinder.