Method for manufacturing medical linear member
A method of manufacturing a medical linear member includes a step of forming a first spiral body ( 1 ) whose cross-sectional shape is a substantially perfect circular shape by spirally winding a base body ( 3 ) having a plurality of arrayed wires ( 2 ) formed of a shape memory alloy, around a winding core ( 4 ), a step of performing a first shape memory process on the first spiral body ( 1 ), a step of cutting the first spiral body ( 1 ) into a first predetermined length, a step of removing the winding core ( 4 ) from the cut first spiral body ( 1 ), a step of forming a second spiral body ( 6 ) whose cross-sectional shape is a flat shape by compressing the first spiral body ( 1 ) in a diametral direction, and a step of performing a second shape memory process on the second spiral body ( 6 ).
1. A method of manufacturing a medical linear member, the method comprising:
a step of forming a first spiral body whose cross-sectional shape is a perfect circular shape by spirally winding a base body having a plurality of arrayed wires formed of a shape memory alloy, around a winding core formed of a round bar, at intervals in a direction along an axial length of the winding core;
a step of performing a first shape memory process by heating the first spiral body;
a step of cutting the first spiral body into a first predetermined length;
a step of removing the winding core from the cut first spiral body;
a step of forming a second spiral body whose cross-sectional shape is a flat shape by compressing the first spiral body from which the winding core is removed, in a diametral direction of the substantially perfect circular shape; and
a step of performing a second shape memory process by heating the second spiral body.
2. The method of manufacturing a medical linear member according to claim 1 , further comprising:
a step of cutting the second spiral body subjected to the second shape memory process, into a second predetermined length.
3. The method of manufacturing a medical linear member according to claim 1 ,
wherein the first spiral body is compressed by placing the first spiral body heated by the first shape memory process, on a base while a heated state is maintained, and by pressing a compression member from above.
4. The method of manufacturing a medical linear member according to claim 3 ,
wherein the compression member is pressed by a spring member which biases the compression member in a direction toward the first spiral body.