JIG DEVICE AND JIG UNIT

原文（中文）

A jig device of a workpiece in a machine tool includes: a holding mechanism that holds the workpiece in a cantilevered state; and a spindle-direction support mechanism including at least one spindle-direction support member disposed to face the workpiece from a side opposite to a spindle of the machine tool in a spindle direction with respect to the workpiece held in the cantilevered state by the holding mechanism. The spindle-direction support mechanism includes a spindle-direction drive unit that drives the spindle-direction support member in the spindle direction between a spindle-direction support position in contact with the workpiece and a spindle-direction retracted position separated from the workpiece, wherein the spindle-direction support mechanism is configured to be capable of changing a contact position where the spindle-direction support member is in contact with the workpiece on an orthogonal plane orthogonal to the spindle direction.