Lifting apparatus

摘要

This invention provides a lifting apparatus which holds a work by clamping the work vertically, and lifts the work. The lifting apparatus includes upper and lower clamping units, a guide mechanism which guides lifting movements of the upper and lower clamping units, a driving mechanism which drives the lower clamping unit to lift along the guide mechanism, and a stopper which is set so that the upper clamping unit is stopped before the lower clamping unit reaches a downward movement lower limit during the downward movement of the units, and which defines a downward movement lower limit of the upper clamping unit.

主权项

1. A lifting apparatus for holding a work by clamping the work vertically, and lifting the work, said apparatus comprising:
an upper clamping unit configured to be brought into contact with the work from above; a lower clamping unit configured to be brought into contact with the work from below; a guide mechanism configured to guide each lifting movement of the upper clamping unit and the lower clamping unit; a driving mechanism configured to drive the lower clamping unit to lift along the guide mechanism; an engaging mechanism configured to engage the upper clamping unit and the lower clamping unit; a rod extending in a vertical direction so as to pass through the upper clamping unit, the rod having a lower portion attached to the lower clamping unit; a biased portion on an upper portion of the rod, the upper portion protruding from the upper clamping unit; and a biasing member between the biased portion and the upper clamping unit, and configured to bias the biased portion and the upper clamping unit in a direction to be separated from each other, wherein the engaging mechanism includes: a support member fixed to the upper clamping unit; a lever member pivotally supported by the support member; and an engaging member fixed to the lower clamping unit, the engaging member includes a first engaging portion, the lever member includes a second engaging portion, and the first engaging portion and the second engaging portion are mechanically engaged with each other by the lifting movement of the lower clamping unit.