| 摘要 |
PROBLEM TO BE SOLVED: To control in simple constitution the rotating position of a belt walk control cam for controlling the inclination of the roll axis of a steering roll in a belt supporting device. SOLUTION: When a belt walk control motor M5 is on, since roll axis moving support members 2, 3 move to the specified home position, by rotating the belt walk control motor M5 by the specified angle, the belt walk control cam 9 can be moved to the specified rotating position, and the roll axis moving support members 2, 3 supporting the steering roll Rm and a roll axis Rma supported with the roll axis moving support members 2, 3 can be moved to the specified control starting position. The rotating position of the belt walk control cam 9 can be controlled in simple constitution, and inclination of the roll axis Rma of the steering roll Rm in the belt supporting device can easily be controlled.
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