| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a branch pipe connection structure excellent in durability, which can surely connect each branch pipe with a main pipe when a plurality of the branch pipes are connected with the main pipe at intervals of a space at most 50 mm. SOLUTION: Each female tapered thread 3 is formed in a main pipe 1 at the positions corresponding to branch pipe setting positions, concurrently, a male tapered thread 4 is formed in the outer circumference at the tip end part of each branch pipe 2, and each male tapered thread 4 at the branch pipe 2 side, is screwed in each female tapered thread 3 at the main pipe 1 side under a situation that adhesive 5 are interposed between each female tapered thread 3 at the main pipe 1 side and each male tapered thread 4 at the branch pipe side so as to allow both of them to be threadedly engaged with, and fixed to each other, so that a plurality of the branch pipes 2 are thereby connected with the main pipe 1. Besides, an effective screw thread cutting length L for each female tapered thread 3 at the main pipe 1 side and each male tapered thread 4 at the branch pipe 2 side, shall be equal to or more than 5 mm.</p> |
