| 摘要 |
In a second frame part (20) is a partly toothed shaft (21) and constructions (9,29,23) which run in a guide in the first frame part (10) and are fixed with a lock pin on the rapid coupling. In a third frame part (32) is a toothed body which is spring-loaded and runs in guides on the second frame part (26). A fourth frame part (2) runs vertically to the third frame part (32). It incorporates guides (3). It is fixed by a lock pin on a rapid coupling (8) fitted on a plate-type body belonging to the third frame part (32). |
