| 摘要 |
<p>A press apparatus having a crank shaft mounted in a crown and having at least one crank portion, and first, second and third roller followers which are fitted on the crank portion to be rotatable about the axis of the crank portion eccentric with the rotational axis of the crank shaft and which are disposed parallel with each other in the axial direction of the crank portion in positions corresponding to the left and right ends and an intermediate section of the crank portion. The apparatus also has a slide post which is disposed in the crown to be slidable in the vertical direction and which is connected at the lower end to a slide, and upper and lower roller pads disposed in the slide post and respectively having a pressure-contact surface which pressingly contacts the first and second roller followers and a pressure-contact surface which pressingly contacts the third roller follower. As the crank shaft rotates, the vertical movement of the slide post is generated by the eccentric rotary motion of the first, second and third roller followers. The radius of this rotary motion is defined by the distance between the rotational axis of the crank shaft and the axis of the crank portion.</p> |
