| 摘要 |
<p>The device is associated with a plate (1) for closing one head of a box housing a roller (2), with a cylindrical recess (4) made in the plate coaxially to a through hole (5) and into which a bush (6) is placed. The bush is provided with an axial hole (15) with polygonal section and two strikers (8) suited to fit into corresponding notches (7), through the effect of the action of a spring (9) placed inside the recess (4) on a collar (16) integral with the bush, to achieve the locking of the axial rotation of the bush (6); a washer (10), fastened to said plate (1) closes the recess (4) and axially pushing on the bush and rotating the same achieves the release of the strikers (8) from the notches (7), and the adjusting of the pre-loading of elastic means associated to the roller.</p> |
