| 摘要 |
PURPOSE:To prevent detachment of an adhesive member, by making the outer diameter of an insert end part somewhat larger than the inner diameter of a sleeve, and providing a notch groove to the halfway part of the sleeve, and melting the sleeve and the end part to insert the end part in the sleeve, and allowing a part of the melt to protrude in the notch groove to fix the sleeve and the end part. CONSTITUTION:When a groove 8 is provided to the sleeve 7 of a lower candle 3 constituted so as to insert the lower end part 2 of a central pipe 2 in the sleeve 7 and the lower end part of the central pipe 2 is thermally welded to the sleeve 7, the lower end part of the central pipe 2 and the sleeve 7 are heated to predetermined temp. to be melted and the lower end part of the central part 2 is inserted in the sleeve 7 of the lower candle 3 in a molten state. Since the inner diameter of the sleeve 7 is made somewhat smaller than the diameter of the lower end part of the central pipe 2, the lower end part of the central pipe 2 protrudes from the interior of the sleeve 7 and, when the protruding part 9 is solidified, said part functions as the protrusion member engaging with the groove 8 and, after thermal welding, the central pipe 2 is prevented from coming off from the sleeve 7 of the lower candle 3. Therefore, even when both products are insufficient in adhesion, they are prevented from coming out and off. |
