| 摘要 |
PROBLEM TO BE SOLVED: To prevent a lateral slip of plastic molding members, which is generated in a space to allow a screw tightening motion from occurring when the upper and lower plastic molding members are fitted by fastening screws. SOLUTION: This plastic molding box body is constituted by fastening the upper molding member and the lower molding member molded of a plastic with screws. In this case, a pedestal having a screw-passing hole is provided on one of the molding members. A boss having a female thread section is provided on the other molding member. The boss is brought into contact with the pedestal, and a screw is inserted from the screw-passing hole, and is screwed with the female thread section provided on the boss. The box body is formed to fit the upper and lower molding members with each other in such a manner. In such a box body, the pedestal and the boss are formed in a manner to be fitted each other by coarsely providing a plurality of small protuberances on the contact surfaces of the pedestal and the boss by drawing. Alternatively, an uneven section is provided on the contact surfaces to fit them with each other. Thus, the lateral slip of the upper and lower molding members is prevented from occurring by this fitting device for the upper and lower molding members in the plastic molding box body of such a constitution.
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