| 摘要 |
PURPOSE: A device to tighten the joint of a drainpipe is provided to prevent the leakage of drainpipes while the device is assembled regardless of the contraction percentage, outer diametric error and work condition of the drainpipes. CONSTITUTION: A waterproof sheet(15) surrounds the joint of drainpipes(11,11'), and a connecting plate(12) surrounds the waterproof sheet. In the connecting plate, belts(13,13') for assembling and grooves(14) for assembling are formed in both sides. A hook bolt(18) is hooked over hook-blocks(16), and inserted in fastening holes(17). A nut(19) fastens the bolt. Therefore, the joint of the drainpipes is perfectly fastened, and the leakage in the joint is prevented.
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