JPS63121802U

JPS63121802U -

Info

Publication number: JPS63121802U
Application number: JP1398787U
Authority: JP
Priority date: 1987-02-02
Filing date: 1987-02-02
Publication date: 1988-08-08

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す概略的な縦断
側面図、第２図は従来例を示す縦断側面図である
。２３……ピストンロツド、２４……シリンダ、
２５……ピストン、２９……復帰用コイルばね、
３０……第１の部屋、３２……第２の部屋、３１
，３３……圧力供給口、３４……圧力供給機構。 FIG. 1 is a schematic vertical side view showing an embodiment of the present invention, and FIG. 2 is a vertical side view showing a conventional example. 23... Piston rod, 24... Cylinder,
25...Piston, 29...Returning coil spring,
30...first room, 32...second room, 31
, 33...pressure supply port, 34...pressure supply mechanism.

Claims

[Scope of utility model registration request]

A piston connected to a piston rod is slidably accommodated in the cylinder, and a coil spring is accommodated in either a first chamber or a second chamber partitioned by the piston. In the cylinder type drive device in which a pressure supply port is provided in the other chamber in which the coil spring is housed, a pressure supply port is also provided in the chamber housing the coil spring, and fluid pressure is supplied to the first chamber through these respective supply ports. a pressure supply mechanism that releases fluid pressure from a second chamber to the atmosphere at the same time as the coil is introduced, and releases the pressure from the first chamber to the atmosphere at the same time as the pressure is introduced into the second chamber; A cylinder-type drive device characterized in that the piston is pressed by the pressing force of a spring, and at the same time, the piston is pressed by pressure introduced into a chamber in which the piston is accommodated.