| 摘要 |
<p>A box holder (25) vertically movably mounted on a frame (26) is reciprocably movable between a box attaching position and a box receiving position. The box holder (25) includes a recess for receiving a box (20) and a clamp finger (32) for retaining the box (20) in the recess (31). The clamp finger (32) is pivotably mounted on a slide block (34) vertically movably disposed in a recessed portion (30) defined in the box holder adjacent to the recess. The box holder (25) further includes a cam (38) facing the recessed portion (30) and a cam folower (37) provided on the clamp finger (32). Upon vertical movement of the slide block (34), the cam follower (37) is brought into engagement with the cam 38 to cause the clamp finger (32) to angularly move toward and away from the recess (31 thereby releasably retaining the box (20) in the recess. The box holder (25) thus constructed is compact in structure and reliable in operation.</p> |
