| 摘要 |
PROBLEM TO BE SOLVED: To provide a means for preventing a joint from being dropped out or released after it is engaged. SOLUTION: The joint for engaging a resin-made board having an engaging hole is composed of a combination of resin-made joints 1 and 2. The joint 1 includes a plurality of column portions 1 protruding onto a flat plate, the columnar portions being annularly aligned, and a tongue piece 1 provided at the vertex of each columnar portion, and the column portions 1 are inserted to the engagement hole of the resin-made board to press the resin-made board by the tongue pieces 1, whereby primary engagement is attained. The joint 2 is composed of a plurality of columnar portions 2 protruding from a flat surface, the columnar portions being annularly aligned, and a tongue piece 2 provided at the vertex of each columnar portion, the columnar portion 2 being provided at a position where it is not interfered with the columnar portion 1. The columnar portions 2 are inserted to the center of the annularly aligned columnar portions 1 which are primarily engaged to press the resin-made board from the opposite side by a tongue piece 2, whereby secondary engagement is attained. COPYRIGHT: (C)2011,JPO&INPIT
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