Work piece conveyance jig and conveyance device provided with same, and induction heating device

A workpiece conveyance jig, which is formed of a shaft-shaped body made of a ceramic, the shaft-shaped body having a helical protrusion formed along an outer periphery of the shaft-shaped body, and is to be rotationally driven along an axis of the workpiece conveyance jig under a state of being arranged inside an induction heating coil, the workpiece conveyance jig comprising:

• an inner member, which is formed of a solid shaft having a constant diameter, and is configured to receive a rotational driving force;
• and
• an outer member, which has a hollow shaft shape, has the helical protrusion, and is mounted on an outer periphery of the inner member so as to be rotatable together with the inner member,
• wherein the outer member comprises:
• a plurality of cylindrical bodies arranged in a row in an axial direction of the workpiece conveyance jig, each of the plurality cylindrical bodies having an inner peripheral surface that faces an outer peripheral surface of the inner member;
• and
• a convex and concave fitting portion formed between two adjacent ones of the plurality of cylindrical bodies, and
• wherein the convex and concave fitting portion is configured to engage the two adjacent cylindrical bodies with each other in a direction of rotation of the inner member.