In the ball chain which forming in regular interval,

摘要

PROBLEM TO BE SOLVED: To provide a ball chain having a fail-safe function and a simple configuration.;SOLUTION: This ball chain is constituted into an endless manner by molding balls made of synthetic resin on a cord at an equal interval. One of the balls 15 includes a strength attenuating means 16 for reducing tensile strength of cords 14a, 14b in the ball 15.;COPYRIGHT: (C)2011,JPO&INPIT