| 摘要 |
<p>The apparatus has an L-shaped piece (6), at the upper end of whose vertical arm (10) there is located a gripping hook (18) turning relative to the vertical arm and at a rear end whose horizontal arm (7) there is located a transverse turning shaft. There is a projection (24) on the vertical arm (10) of the the L-shaped piece (6), which projection in a certain position of the gripping hook (18) is at least partially in front of the open gap of the gripping hook, and in another position it leaves the open gap of the hook mainly open. The vertical arm (10) of the L-shaped piece (6) is provided with a means (26), by means of which the hook portion (18) may be supported, when so needed, higher than its position turned furthermost backwards. <IMAGE></p> |
