| 摘要 |
PURPOSE: To heighten the tensile and compression strengths by engaging a holding element provided at one edge with a cutout in another edge in the edge direction in the form of shape-complementation, and contacting a projection on the edge with a member having cutout in the edge direction in the form of shape-complementation. CONSTITUTION: A holding tab 9 having lugs 10 and 11 is installed on the edge 3 of one 1 of the two plate-form members 1 and 5, and the tab 9 formed on the other member 5 is engaged with a cutout 13 in shape-complementation. The first member 1 is equipped with projections 17 and 19 so that they make contact with parts 18 and 20 of the other member 5, and the two members 1 and 5 are hindered from slipping aside. This does not require other processing, to allow use of a material which may rust, and the coupling part can have a high strength, in particular, can sustain a tensile and a compression load. |
