| 摘要 |
<p>PURPOSE:To prevent a trouble for a long period in a traction machine of communication cable or the like, by summetrically arranging a pair of main oil hydraulic cylinders and guiding a rod end moving block of a suboil-hydraulic cylinder with a guide rod. CONSTITUTION:A cable 37 is inserted to a net 24 and supporting rings 25a, 25b, and then pressure oil is fed to a suboil-hydraulic cylinder 27, if a rod 27a is moved forward, the net 24 reduces its diameter to hold the cable 37. When rods 22a of main oil hydraulic cylinders 22 are moved forward, the net 24 is moved forward with a moving block 23, and the cable 37 is extracted by a stroke. Here the main oil hydraulic cyliders 22 are symmertically arranged to the left and right, then bending moment is not acted on each rod 22a to guide a moving block 29 with a guide rod 28, thus a machine is provided with a less part susceptible of causing wear or damage to never cause a trouble throughout a long period.</p> |
