Workpiece Holding Device and Workpiece Conveyance Device

A workpiece holding device comprising:

• a plurality of first claw portions disposed to be spaced apart from each other in a predetermined plane and capable of linearly moving in a direction parallel to the predetermined plane;
• a second claw portion and a third claw portion disposed to face each other in a direction orthogonal to the predetermined plane;
• and
• a motion conversion mechanism portion that converts a linear motion associated with movement of the first claw portion into a linear motion in the direction orthogonal to the predetermined plane, transmits the linear motion to the second claw portion, and causes the second claw portion to linearly move in the direction orthogonal to the predetermined plane,
• wherein the third claw portion is integrated with the first claw portion.

A workpiece holding device comprising:

• a plurality of first claw portions disposed to be spaced apart from each other in a predetermined plane and capable of linearly moving in a direction parallel to the predetermined plane;
• a second claw portion and a third claw portion disposed to face each other in a direction orthogonal to the predetermined plane;
• and
• a motion conversion mechanism portion that converts a linear motion associated with movement of the first claw portion into a linear motion in the direction orthogonal to the predetermined plane, transmits the linear motion to the second claw portion, and causes the second claw portion to linearly move in the direction orthogonal to the predetermined plane,
• wherein
• the motion conversion mechanism portion includes:
• a movement member that has a first inclined surface extending in a diagonal direction relative to the predetermined plane, that is linearly movable in the direction parallel to the predetermined plane together with the first claw portion, and that is supported to be linearly movable in the direction orthogonal to the predetermined plane;
• and
• a fixed member having a second inclined surface that is in surface contact with the first inclined surface, and
• the second claw portion is provided in the movement member at a position away from the first inclined surface in the direction orthogonal to the predetermined plane.