| 摘要 |
<p>PURPOSE: To improve strength against pulling force by engaging an engage groove part with a steel plate on the front surface side and further making it strongly intruded into the steel plate while extending its diameter to the outside by forming the engage groove part on the top end outer periphery of a plug. CONSTITUTION: When a plug 4 is inserted from the side of a steel plate 2 into a drill hole 1a pierced and formed on a wall panel 1, in the case of passing an outer protruding part 8 through the steel plate 2 at the time of insertion, the outer protruding part 8 is shrunk by reducing its diameter to the inside through an inserting side slit 7 and when the outer protruding part 8 is moved inside the steel plate 2, the outer protruding part 2 is stopped inside the steel plate 2 by extending its diameter inside the steel plate 2 because of elasticity. At such a time, the state of engaging an engage groove part 9 with the steel plate 2 is provided. Next, when a vis 15 passed through an instrument 16 is screwed from the front surface side into an inserting hole H of the plug 4, the screw of the vis 15 is intruded into a long projected line on the inner periphery of the plug 4 at the screwing time of the vis 15 and the long projected line is pushed outside. Thus, the diameter of the engage groove part 9 is extended through the inserting side slit 7, and the engage groove part 9 is strongly intruded into the steel plate 2.</p> |
