| 摘要 |
PURPOSE: An insert for bolt coupling is provided to ensure convenient insert and coupling of a bolt and also simple manufacture and low manufacturing cost. CONSTITUTION: An insert for bolt coupling comprises a body(70), a fastener(50), a cover(20), and a spring(30). The body comprises an upper cylindrical part having a cylindrical hole, an angled part having a taper hole which is extended from the cylindrical hole with a diameter decreasing downward, and a lower cylindrical part having a cylindrical hole which is extended from the taper hole. The fastener includes two fastening pieces which are partly inserted in the taper hole of the angled part and form a vertical through hole when faced each other and a connection part which connects the fastening pieces. The cover is installed on the top of the upper cylinder part. The spring is installed between the top of the fastener and the cover.
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