| 摘要 |
PURPOSE:To obtain a lightweight lattice like structure generating no lowering of strength using a reduced number of parts by providing notches to at least one of longitudinal members or lateral members formed from a fiber reinforced material and meshing the other lateral or longitudinal members with the notches to allow both members to cross each other to integrally bond them. CONSTITUTION:A lattice is formed in the internal space formed by an outer frame member 2 by longitudinal members 3 and lateral members 4. The longitudinal members 3 are formed from a flat plate and notches 3a are provided to the upper end sides thereof at a prescribed interval and the lateral members 4 have protruding curved surfaces 4a and recessed curved surfaces 4b from the upper end sides thereof to the lower end sides thereof and notches 4c are provided to the lower end sides thereof at a prescribed interval. These notches 3a, 4c are mutually meshed to form the crossing parts of the longitudinal and lateral members 3, 4 to integrally bond both members 3, 4. Since the longitudinal members continue from one short lateral side surface plate 7 to another short lateral surface plate 7 without being divided and the lateral members continue from a longitudinal side surface plate to the another longitudinal side surface plate 6 in this lattice like structure, the strength of the lattice like structure is increased. |
