| 摘要 |
<p>PURPOSE:To make an sure welding to be possible by rendering a floating bar swingable up and down in supporting it by means of a spring, and supporting a holding member through a rotation shaft so as to be rotatable to the flat part direction of the under surface of a heater chip. CONSTITUTION:When a screw bar 16 extends for the descending drive, the driving force is transmitted from a pressure adjusting screw 17 to a floating bar 10 via a compression bar 13 in way of an upper spring 11, and also transmitted directly from a clutch mechanism 18. After that, a heater chip 33 comes into contact with a lower work, and immediately after that, an auxiliary cylinder rod 24 is contracted to be spaced away from the upper surface of a flange part 23. The condition at this time means a compression force only sufficient to raise the heater chip through the height of the work, namely, where it becomes a compression through the spring pressure adjusted by the pressure adjusting screw 17. On the other hand, engaging members 38a, 38b which engage a sliding member 29 and holding member 31 release the engagement immediately after the contact, and should the contact of the under surface of the heater chip 33 be not even, the holding member 31 rotates about point P of a initial contact part of the heater chip 33 following rotation, thereby rotating smoothly without shifting the position of the work.</p> |
