PURPOSE: To prevent flaws and nicks from generated in handling a workpiece by providing a cage bucket at the machined workpiece accumulation position in front of a barrel working machine and by providing a liquid tank for soaking this bucket below it with capable of lifted and lowered.

CONSTITUTION: A machined measure is, for example, discharged onto a vibration type selector 51 by rotating a barrel tank 4a and abrasives are stored in a bucket 3 for lifting at the position F for charging a content with unmachined workpieces. In the meantime, machined workpieces drop to a cage bucket 14 at the workpiece accumulation position H in the soaked state by a liquid tank at the lifted position. When the workpieces in the cage bucket 14 reach a prescribed amount, the vibration type selector 51 is stopped and the liquid tank is lowered to transfer the workpieces from a cage bucket table to a stock conveyer 5 for the next process. Thus, work is rationalized and generation of flaws and nicks in handling of the workpieces can be prevented.