| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the application of excess load to both cylinders even when the rattling is generated on pins and to prevent the fracture of the cylinders on condition that two-cylinder system where two hydraulic cylinders for driving two pins are combined back to back, is applied. <P>SOLUTION: Both hydraulic cylinders 43, 43 driving the first and second pins 41, 42 are arranged in series independently from each other in such a state that cylinder expansion-side reaction forces are transmitted to each other at their rod ends, and guide members 48, 48 for supporting both pins 41, 42 in a stroke-operable state, are formed on outer peripheries of the hydraulic cylinders 43, 43. Ring-shaped supporting plates 49, 49 are mounted on the guide members 48, 48, and inner periphery sides of the supporting plates 49, 49 are mounted in a state of permitting a specific quantity of radial movement of the rod end parts to the rod end parts while transmitting the cylinder contraction-side reaction forces to the guide members 48, 48. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
