| 摘要 |
A side wall section of a rigid unit forming a slide guide frame section has a depressed portion formed on approximately one half, a through-hole formed on approximately the other half, and a projection adjacent to the through-hole provided in the inner side of the approximate center. The depressed portion is provided with, in the approximate center, a shaft portion projecting to the outside, and a notch cut out, in the height direction of the rigid unit, from the approximate center of the depressed portion to one end of the side wall section. Two adjacent rigid units are coupled by inserting the shaft portion into the through-hole from the inside, and one freely rotates with respect to the other within the range of the projection contacting one end and the other end of the notch. |
