| 摘要 |
PROBLEM TO BE SOLVED: To exchange workpieces by moving a plurality of workpieces set on a turntable to the outside of a blast chamber together with the turntable in a sand blast device. SOLUTION: A base 3 is arranged in a blast chamber so as to carry it in and discharge it, a turntable 4 is turnably mounted on the base 3, a workpiece support part 41 and a roller 43 concentric with the workpiece support part 41 are provided at an equal interval on a virtual circle concentric with the center of rotation of the turntable 4, a sprocket 64 capable of meshing with a row of rollers on the turntable 4 while the rotary base 4 enters a machining position together with the base 3 is arranged at the machining position, and an intermittent rotation drive device 6 is linked to the sprocket 64.
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