| 摘要 |
In a gripper with two pivotable jaws (5,6) for engaging a core mask (7) or the like in an automated foundry plant, each jaw is actuated by a knee-joint linkage (18,22a and 19,22b respectively) with a common member (22) driven by a single hydraulic cylinder (24). By arranging the actuating mechanism as shown, it is possible (a) to move the two jaws between their gripping positions shown and their position of rest (not shown) by a single hydraulic cylinder or equivalent motor, and (b) to move the two jaws between said positions without risk of the jaws colliding with each other, as during the movement to the position of rest (not shown), the lower jaw (5) is swung into the gripper housing (9) before the upper jaw (6).
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