| 摘要 |
PURPOSE: A bolt and a nut equipped with an intaglio reflecting surface is provided to utilize the auxiliary function of a sign by a bolt and a nut with cheap costs. CONSTITUTION: A bolt and a nut equipped with an intaglio reflecting surface comprises: intaglio sections(111,211) which are formed on a head unit(101) of a bolt(100) and the outside of a body(202) of a nut(200) and are formed on the inside of the edge of the contact surface(110,210) with each tool; light reflection units(111a,211a,121a) which are formed in the intaglio section. A caved intaglio section(121) is formed on the inside of the edge of the top surface(120) of the head unit of the bolt. One among a light reflective material and a reflective sheet in high brightness is selectively used for the light reflection unit.
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