| 摘要 |
PROBLEM TO BE SOLVED: To prevent a cable from meandering at a bent part thereof, or from lifting before a bent point, when the bent part is moved.SOLUTION: A movable cable 1 comprises: a plurality of resin coating striped bodies 4 made of an electric wire and the like placed in an arcuate parallel way; a resin-made web-like coupling part 12 coupling each of the plurality of resin coating striped bodies 4; and resin 5 coating perimeter of each the resin coating striped bodies 4 so as to make the resin coating striped bodies in one body. On bending, the movable cable 1 becomes in a plane shape through the web-like coupling part 12, and internal stress due to tension &sgr;1a and internal stress due to compression &sgr;2a are generated at the web-like coupling part 12. Then, a center of thickness tc of the coupling part 12 is located inside of an arc line a made by a center 4c of the resin coating striped bodies 4, that is, an arc line c made by a center tc of each coupling part 12 is located inside of the arc line a (as shown in Fig. (a)), so that bending moment M1 becomes large because of the inner stresses &sgr;1a and &sgr;2a at the coupling part due to bending, and return force according to a sum of the bending moment M1 makes the movable cable surely recover from a bending state to the plane state, without lifting. |
