Patent ID: 7866154

Claim:
A manufacturing apparatus capable of manufacturing a product in which a component made of shape memory alloy and having a predetermined length is stretched from a first fixing part to a second fixing part, comprising: a stretcher that holds a shape memory alloy in a tensioned state at least before said shape memory alloy is fixed to said first fixing part and said second fixing part; and a current feeder that passes current to said shape memory alloy in said tensioned state held by said stretcher, said shape memory alloy fixed to said product in said tensioned state being used as said component to produce said product, wherein said stretcher has a guide which can move and/or rotate relative to said product, and guides and sends said shape memory alloy, said guide has a cylindrical shape having an exit opening part from which said shape memory alloy is sent, said exit opening part includes a curved surface having radius curvature which is at least five times as large as a thickness of said shape memory alloy, and an opening area of said exit opening part is at least twice as large as a sectional area of said shape memory alloy.