| 摘要 |
<p>PURPOSE:To provide a tube jointing method without generating a gap by connecting a pair of a front and a back carriages capable of running inside tubes to be freely moved to get closer to/apart from each other by an expansion connection device, and forming this carriage to be pressure-applied to an inner surface of the tube by inflation of a bag body. CONSTITUTION:Carriages 10, 20 which are moved by expansion of a hydraulic cylinder 30 as an expansion connection device to get closer to/apart from each other are run inside a pair of tubes 1, 3 having gap generated between their tube end surfaces. One carriage is positioned inside one tube, while the other carriage is positioned inside the other tube, and bag bodies 40, 50 are inflated to be pressure-applied to inner surfaces of the tubes. The hydraulic cylinder 30 as the expansion connection device is then contracted to get the carriages 10, 20 closer to each other relatively. The carriages 10, 20 thus apply the tube end surfaces to each other through the bag bodies 40, 50 because they are integrated with the respective tubes. They can thus be jointed with each other without generating gap, and the post-work such as applying filler material, can be dispensed with.</p> |
