| 摘要 |
The present invention can provide a loop pin which is made of Polypropylene resin with low production costs as well as with highly production efficiency and which is friendly to environment. The loop pin of the present invention comprises an insertion head portion 5 provided with a first rod section 52, the diameter of the rod there of being smaller than the maximum diameter of the head section 51 of the insertion head portion 5 and a second rod section 53, the diameter of the rod there of being smaller than that of the rod in the first rod section 52, and a socket portion 6 provided with a hole portion 13 and on an inside wall of which a step like portion 15 being formed which comprising a first inclined edge section 18 and a second inclined edge section 20, each being continuously extended from the inner surface wall of the hole portion with a predetermined angle, respectively. |
