| 摘要 |
<p>PROBLEM TO BE SOLVED: To lessen the warpage and twist of a backpost assembly by stringing and to simplify the adjustment of action by providing the assembly with plural wooden materials which are framed to each other and having outer backposts in both right and left side parts and providing the right and left outer backposts with steel products for reinforcement mounted at these backpost so as to extend along their longitudinal direction. SOLUTION: The backpost assembly 1 is formed by framing the wooden square materials, such as laminated materials and solid materials, and has the outer backposts 2 in both right and left side parts, plural middle backposts 3 on the inner side thereof, beams 4 spanned in a transverse direction, a sill 5 and a box 6. Long grooves 21 are respectively formed on the outer flanks of the outer backposts 2 across the outside surfaces of the beams 4 and sill 5 continuous with these surfaces. C shapes 22 are housed as the steel products for reinforcement in these long grooves 21 and are screwed to the bases of the long grooves 21. In such a case, the C shapes 22 which are deformed materials are mounted at the respective outer backposts 2 along their longitudinal direction and, therefore, the rigidity to the bending deformation in the forward and backward direction of the backpost assembly 1 is increased.</p> |
