| 摘要 |
The clamping device comprises a box-shaped body provided with a clamping member movable between a forward position and a backward position. Control means are provided for controlling the movement of the clamping member; the control means comprise a thrust member operatively connected to the clamping member by an articulated quadrilateral system, and a toggle-link, in which the hinge point of the link, in the backward position of the clamping member are disposed on opposite sides of the thrust member. The device also comprises scraping means for cleaning the clamping member and to prevent the infiltration of dirt.
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