| 摘要 |
<p>A welding device that: makes it possible for not only the heater but also the welding head as well as the device as a whole to be made more lightweight and smaller; is able to increase welding efficiency with a simple configuration; and is also able to reduce cost significantly. The welding head (11) that encircles and holds the junction (3) of a coupling (1) and a tube (2) has multiple clampers (20) that can be opened and closed. The heaters (30), which are provided along the inner circumference of each clamper (20), are obtained by overlaying sheet-shaped insulating materials (32) on the front and back of a sheet-shaped heat-generating body (31), fixing same to a thin metal plate (33) and bending to an arc shape that follows the inner circumferential surface of the clamper (20). When the respective clampers (20) are in the closed position, the heaters (30) are disposed so as to surround the outer circumference of the junction (3) continuously in the circumferential direction without a gap, the two respective adjacent end sections (30a) abutting against each other.</p> |
