| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the entry of foreign matter such as earth and sand, water, mud, etc., from a terminal of an embedded pipe when embedding construction work is interrupted, prevent rusting and corrosion of tightening tools of a treating plug, facilitate the plug removing operation of the treating plug, and resume the connection construction work of the embedded pipes smoothly. SOLUTION: A terminal treating plug 10 consists of a first diameter expansion member 10A, a second diameter expansion member 10B, an elastic ring member 10C, and tightening means 27, 28. A cap 30 is detachably mounted in a cylinder 12 having a bottom of the first diameter expansion member 10A. The cap 30 is constituted by molding a handle 31, a lid part 32, and a cylindrical part 33 integrally by using a synthetic resin material. A protruding bar ring 34a on a basic end side which is fitted tightly in the cylinder 12 having the bottom of the first diameter expansion member 10A is formed on a basic end side of an outer peripheral face of the cylindrical part 33, a plurality of cut-in sections 35 are formed from a tip of the cylindrical part 33 to the vicinity of the protruding bar ring 34a, and the cylindrical part 33 is fitted tightly along gradient for removing a casting mold of the cylinder 12 having the bottom.</p> |
