| 摘要 |
<p>PURPOSE:To improve the controllability of a work tool by actuating the work tool with pressurized fluid which is supplied from the external fluid power source to the device main body equipped with the work tool. CONSTITUTION:A solenoid valve 22 operates, receiving power supply from a battery 23 which is built in the device main body 1, and it has three three-way directional control valves built-in, which respectively change over discharge pipes 25, 26, and 27, for supplying the air being supplied from a supply pipe 24 connected to the pressure fluid path of a control lever to an air cylinder 6, an air motor 7, and an air cylinder 21 respectively, to any of 'DRIVING' (the condition were those are connected to the supply pipe 24), 'HOLDING' (the condition where the air does not go out or enter), and 'OPEN' (air communicated condition). Moreover, limit switches 28 and 29 are respectively connected to the solenoid valve 22, and a relay circuit (control circuit) operates so as to change over the solenoid valve 22 to any of 'DRIVING', 'HOLDING', and 'OPEN', by the ON or OFF signal from them.</p> |
