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