| 摘要 |
A fastening device comprises a pin-shaped fastener having an axis, and means for tightening and loosening the fastener, the tightening and loosening unit including one element provided with first connecting means for connecting the one element with the fastener and also provided with second connecting means, and another element provided with third connecting means cooperating with the second connecting means of the one element for connecting the other element with the one element, so that when a rotary force is applied to at least one of the elements, the elements are shifted coaxially in opposite axial directions and the fastener is displaced in an axial direction. |
