| 摘要 |
PROBLEM TO BE SOLVED: To change the stroke length of a slide by changing the rotational motion of a first crankshaft to bending and stretching motion by a connecting mechanism composing of a pair of levers, having a fixed supporting point on the lever on one side, having a movable supporting point on the lever on the other side, connecting the 1st eccentric shaft of the 2nd crankshaft to the lever having the movable supporting point and connecting the 2nd eccentric shaft to the slide. SOLUTION: The eccentric shaft part 16b of the 1st crankshaft 16 and the 1st eccentric shaft part 20b of the 2nd crankshaft 20 are connected with a connecting mechanism 28. The levers 32, 34 of the connecting mechanism 28 are connected bendably and stretchably with a connecting shaft 30. The other end of the lever 32 is connected to a position adjusting mechanism 38 with the connecting shaft 36 and the other end of the lever 34 is connected to the 1st eccentric shaft part 20b of the 2nd crankshaft 20. The 2nd eccentric shaft part 20c is connected to one end part of a connecting piece (connecting body) 40 and the slide 22 to the other end. The height of the connecting shaft 36 is adjusted with the position adjusting mechanism 38 and the stroke of the slide 22 is changed.
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