| 摘要 |
PROBLEM TO BE SOLVED: To enhance the detection accuracy of a load cell by avoiding the generation of scraping and the increase of frictional resistance by an angular ball bearing that directly comes into contact with the load cell. SOLUTION: In composing the driving mechanism 1 of an injection molding machine M which has an injection block 3 whereto a rectilinear motion is transferred and a screw coupling 6 whereto a rotary motion is transferred, in which the screw coupling 6 is free rotatively supported through a bearing part 7 by the inner peripheral part of the injection block 3, and which has a built-in load cell 8 for detecting the pressure of the axial direction Fa between the injection block 3 and the screw coupling 6, the bearing part 7 is structured with an angular ball bearing 9 arranged to the rear end face 8r of the load cell 8 and a second bearing 10 arranged side by side to the angular ball bearing 9, and there is provided a gap Gs having a predetermined spacing Ls between the angular ball bearing 9 and the injection block 3. COPYRIGHT: (C)2008,JPO&INPIT
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