| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a plate-formed block from being inclined to the right and left of a belt width direction, even if a reverse curve is generated at a center belt. <P>SOLUTION: When the reverse curve is generated at the center belt 2 due to the formation of protrusions 13c protruding at heights which are the same with the height of a convex part 13a of the center in the width direction at both ends in the width direction of an upper beam 13 of the block 10, and when the center belt interferes with the adjacent upper beam 13, the protrusions 13c at both ends in the width direction are brought into contact with each other, thus preventing the plate-shaped block 10 from being inclined to the right and left of the belt width direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
