| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that in an installation with a capability of freely changing the height of an injection device by an ascending/descending action of a hydraulic cylinder and a guide rod, the piston rod and the guide rod of the hydraulic cylinder need to be of a large diameter because a horizontal force works in the piston rod and the guide rod and consequently, the installation becomes unavoidably large in size. SOLUTION: The level of the injection device 12 can be switched by taking out/in shim blocks 23 and 23 with a specified height between a base 11 and the injection device 12. Consequently, the level is high, when the shim block 23 is set in place, while the level is low, when the shim block is not present. Thus, the desired level of the injection device is realized by taking out/in the shim block 23, so that the level switching operation is facilitated. That, is, bolts have only to be tightened above and under the shim block 23 and for this reason, the bolt tightening operation is very easy. COPYRIGHT: (C)2003,JPO
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