JPS6256285U

JPS6256285U -

Info

Publication number: JPS6256285U
Application number: JP14647385U
Authority: JP
Priority date: 1985-09-25
Filing date: 1985-09-25
Publication date: 1987-04-07

Description

[Brief explanation of drawings]

添付図面は本考案の実施例を示し、第１図は最
大離間位置を示す縦断平面図、第２図は中間離間
位置を示す縦断平面図、第３図は接触位置を示す
縦断平面図、第４図はエアーシリンダー装置１０
の拡大縦断平面図である。１ａ，１ｂ；操作杆、４，４；電極対、１０；
シリンダー装置、１１；シリンダー、１１ａ；天
壁、１１ｂ；底壁、１５；第一ピストン、１８；
第二ピストン、２４；ピストンロツド、３０；第
一可変室、３１；第二可変室、３２；第三可変室
、３３，３４，３６；エアー供給口、３５；エア
ー送給路。 The accompanying drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional plan view showing the maximum separation position, FIG. 2 is a longitudinal sectional plan view showing the intermediate separation position, FIG. 3 is a longitudinal sectional plan view showing the contact position, and FIG. Figure 4 shows the air cylinder device 10.
FIG. 1a, 1b; operating rod, 4, 4; electrode pair, 10;
Cylinder device, 11; Cylinder, 11a; Top wall, 11b; Bottom wall, 15; First piston, 18;
Second piston, 24; Piston rod, 30; First variable chamber, 31; Second variable chamber, 32; Third variable chamber, 33, 34, 36; Air supply port, 35; Air supply path.

Claims

[Claims for Utility Model Registration] (1) Electrodes are provided at the tips of a pair of operating rods that are pivotally connected on the inside by a support shaft, and a driving cylinder is provided between the other ends of the pair of operating rods. The electrode pair is interposed to control the separation and separation of the electrode pair by the expansion and contraction operation of the piston rod of the drive cylinder, and a first cylinder shaped like a bottomed cylinder is disposed in the cylinder pivotally supported by one of the operating rods. accommodating a piston, further disposing within the first piston a second piston connected to a piston rod pivotally supported by the other operating rod,
forming a first variable chamber between the first piston and the bottom wall of the cylinder, a second variable chamber between the first piston and the second piston, and a third variable chamber between the second piston and the top wall of the cylinder; A portable spot welding machine characterized in that each of the variable chambers is communicated with a pressure source via a pressure control mechanism. (2) The portable spot welding machine according to claim (1), wherein the piston rod is provided with a pressure fluid supply path communicating with the second variable chamber.