| 摘要 |
A unitary tool assembly is disclosed for making up bell and spigot joints to couple adjacent pipe sections. The tool includes forward and rearward pipe engaging subassemblies and an intermediate linkage mechanism. The forward subassembly, which straddles a pipe section having a bell end, includes a reciprocative actuator which, through the linkage mechanism, selectively causes toothed cams carried by the rearward subassembly to engage and disengage a pipe section having a spigot end and straddled by the rearward subassembly. When the actuator delivers a power stroke, the toothed cams securely engage the pipe section with the spigot end, and the rearward subassembly is simultaneously pulled toward the forward subassembly such that successive strokes of the actuator effect a ratcheting action in which the bell and spigot joint is made up through a series of stepwise movements of the pipe sections together. Each of the pipe engaging subassemblies includes a partial collar adapted to loosely fit over the pipe section it straddles to thereby provide support for the tool as it is used.
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