FLUID CIRCUIT OF AIR CYLINDER

To provide a fluid circuit of an air cylinder capable of sufficiently suppressing a temperature rise of the air cylinder even if the air cylinder supplying/discharging air through a throttle is used at high speed and high frequency.SOLUTION: In a fluid circuit of an air cylinder 10 connected to a switch valve 28 attached with exhaust ports 30A and 30B, a head side pressure chamber 22 is connected to the switch valve by first piping 26A, and a rod side pressure chamber 24 is connected to the switch valve by second piping 26B. A first throttle 32A is arranged near a connection place between the first piping and the switch valve or a first output port of the switch valve, and a second throttle 32B is arranged near a connection plate between the second piping and the switch valve or a second output port of the switch valve.SELECTED DRAWING: Figure 1 【課題】エアの給排が絞りを介して行われるエアシリンダを高速・高頻度で使用しても、エアシリンダの温度上昇を十分に抑制できるエアシリンダの流体回路を提供する。【解決手段】排気口３０Ａ、３０Ｂが付設された切換弁２８に接続されるエアシリンダ１０の流体回路において、ヘッド側圧力室２２は第１配管２６Ａによって切換弁に接続され、ロッド側圧力室２４は第２配管２６Ｂによって切換弁に接続され、第１配管と切換弁との接続箇所または切換弁の第１出力ポート近傍に第１絞り３２Ａが配設され、第２配管と切換弁との接続箇所または切換弁の第２出力ポート近傍に第２絞り３２Ｂが配設される。【選択図】図１