| 摘要 |
PROBLEM TO BE SOLVED: To easily assemble a side bar of a grating and a main bar thereof without the use of a welding means. SOLUTION: Each of the side bars S is integrally molded by extrusion molding or pultrusion molding; concurrently with that, a locking part Sa is formed in the inside surface of each of the side bars S; a first part Ma to be locked, which can be fitted and locked to the locking part Sa of the corresponding side bar S from the side of one longitudinal end of the side bar S, is formed in the longitudinal end surface of each of the main bars M; a spacer means SP is composed of a plurality of spacers 2 which each have a second part 2a to be locked, capable of being fitted and locked to the locking part Sa from the side of one longitudinal end of the side bar S, and which can be held in the state of being sandwiched between opposed side surfaces of each pair of the mutually adjacent main bars B; and an anti-coming-off means J is interposed between the main bar M or the spacer 2, which is positioned on the outermost side, and the side bar S. COPYRIGHT: (C)2005,JPO&NCIPI
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