| 摘要 |
The propping and holding pivoting square is characterised in that it is composed of a pivot foot (1) on which is fixed solid or pivoting with play a support body (2), designed to be displaced along the pivot foot (1). It has below its lower under face (19), a resilient pad (5) flexibly terminated by a support foot (6) and in that the free end (3) of the pivoting body (2) carries a tilting lever (4) by its lower end (27) shaped in the profile of a cam (31).The lower edges forces the support foot (6) down against the piece (15) to hold or free it from its hold according to the straight or inclined position of the lever (4).
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