| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve waterproof and workability by easily and quickly connecting underground piping to be installed while inserting an underground line in order to protect the underground line. SOLUTION: Curved projecting parts 22 are provided on the ends of a straight pipe 20a and a curved pipe 20b which constitute underground piping 20. A connecting fixture 21 formed into an approximately C shape having a curved recessed part 21c to be rotatably fitted to the projecting part 22 and formed of an elastic body is provided, brackets 24, 24 are projected on both end edges of a cut part 21b of the connecting fixture 21, and upper parts of the brackets 24, 24 are bent in the opposite directions. A clearance is formed among the bent parts 24a, 24a and the outer front surface of the connecting fixture 21, and a wedge 25 is hit in the clearance to fix the straight pipe 20a fitted from the both side surfaces of the connecting fixture.</p> |
