| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a safe, sanitary and easily assemblable and disassemblable instrument by constituting it by a frame body composed of plural hollow rod materials made of plastic connected by joints and a net panel whose end edge is fitted, inserted and supported to the fitting groove of the hollow rod material. SOLUTION: For instance, the frame body is formed by connecting the two kinds of the hollow rod materials 2 made of the plastic in different lengths so as to be rectangular by using the four joints 1 for corners and the three net panels 3 are mounted in the frame body. The joints 1 for the corners are provided with a projection in a truncated conical shape on an upper surface, is provided with a corner part and a fitting part on a lower surface and is obtained by injection-molding polypropylene for instance. The hollow rod material 2 is long, is in a cross section almost square shape provided with an almost C-shaped fitting groove with a lip on a side face in a longitudinal direction and is obtained by extrusion-molding hard vinyl chloride for instance. The net panel 3 is composed of a receiving net and a fitting projection and is obtained by injection-molding the polypropylene for instance.</p> |
