JPH0447878U

JPH0447878U -

Info

Publication number: JPH0447878U
Application number: JP8998990U
Authority: JP
Priority date: 1990-08-30
Filing date: 1990-08-30
Publication date: 1992-04-23

Description

[Brief explanation of drawings]

第１図は本案装置の１例の截断側面図、第２図
は第１図の右側面図、第３図乃至第６図は夫々第
１図の−線乃至−線截断面図である。１……機台、３……加圧シリンダ、３_１……往
動方向前位のエアシリンダ、３_２……往動方向後
位のエアシリンダ、３ａ……隔壁、３ｅ……エア
ポート、４……ガン本体、８……固定ガンアーム
、１１……可動ガンアーム、１４……ピストンロ
ツド、１４ａ……段差面（ストツパ部）、１５ａ
……当座（ストツパ部材）、２８_１……前位のエ
アシリンダのピストン、２８_２……後位のエアシ
リンダのピストン、２９……カラー、２９ａ……
膨大部、３１……シール部材。 FIG. 1 is a cut-away side view of one example of the device of the present invention, FIG. 2 is a right side view of FIG. 1, and FIGS. 3 to 6 are cut-away sectional views taken from the line -- to -- of FIG. 1, respectively. 1... Machine base, 3... Pressure cylinder, 3 ₁ ... Air cylinder at the front in the forward direction, 3 ₂ ... Air cylinder at the rear in the forward direction, 3a... Bulkhead, 3e... Air port, 4 ... Gun body, 8 ... Fixed gun arm, 11 ... Movable gun arm, 14 ... Piston rod, 14a ... Step surface (stopper part), 15a
...Temporary (stopper member), 28 ₁ ... Piston of the front air cylinder, 28 ₂ ... Piston of the rear air cylinder, 29 ... Collar, 29a ...
Ampulla, 31...Sealing member.

Claims

[Scope of utility model registration request]

A gun body with a pressure cylinder attached is supported on the machine base for equalizing movement, a fixed gun arm is fixed to the gun body, and a movable gun body is opened and closed relative to the fixed gun arm by the operation of the pressure cylinder. A gun arm is provided, and the movement of the piston rod of the pressurizing cylinder in the direction of opening the movable gun arm is defined as forward movement, and when the movable gun arm is opened to a predetermined opening position when the piston rod moves forward, the gun arm is formed on the piston rod or a member interlocked therewith. A welding gun device is provided with a stopper member fixedly provided on the machine base side that comes into contact with the stopped stopper part, and the gun body is equalized by the reaction force of contact with the stopper member to separate the fixed gun arm from the workpiece. In a pressurizing cylinder that uses a tandem type cylinder in which a pair of air cylinders are connected at the front and rear in the forward movement direction, there is a space between the pistons inserted in both air cylinders. A collar having both ends in contact with both pistons is inserted into the portion of the piston rod extending through the partition wall, and a large diameter enlarged portion is formed at the end of the collar which contacts the piston of the air cylinder rearward in the forward movement direction,
An air port that communicates with an air chamber defined between the piston of the rear air cylinder and that can receive the enlarged portion is formed in the partition wall, and the stopper portion is connected to the stopper member when the piston rod moves forward. 1. A welding gun device characterized in that the enlarged portion fits into a ring member provided at an open end of the air port to close the air port before coming into contact with the air port.