| 摘要 |
A clamping mechanism consisting of a clamping plate with a bearing block and a clamping piece held pivotably therein has the disadvantage that, if treated incorrectly, the clamping piece can be pulled out of the bearing block. The clamping mechanism thus becomes unusable. In order to remove this disadvantage, it is proposed to thicken the end parts of the axle stubs in a bead-like manner and, if appropriate, to design the clamping piece with limbs bent outwards. <IMAGE>
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