| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily and inexpensively attach a flange plate to a piping connection portion. SOLUTION: The outer periphery of a piping connection portion 40 is formed in a shape having long and short radiuses other than a normal circular shape, an opening 10 capable of inserting the piping connection portion 40 into a flange plate 1 and formed in a shape having long and short radiuses, the short radius of the opening 10 is shorter than the long radius of the piping connection portion 40, a groove portion 2 is formed in the outer periphery of the body part of the piping connection portion 40, the opposing side walls of the groove portion 2 are separated from each other facing outward, the thickness of the opening peripheral edge portion of the flange plate 1 is smaller than the groove width of the largest diameter part of the piping connection portion 40 and larger than a distance between the opposing side walls in a depth coincident with the short radius of the opening 10 in the groove portion 2, the piping connection portion 40 is inserted into the opening 10 of the flange plate 1, the flange plate 1 is rotated in relative relation to the piping connection portion 40 while the opening peripheral edge portion of the flange plate 1 faces. the groove portion 2, and the opening peripheral edge portion of the flange plate 1 is pressfitted between the opposing side walls of the groove portion 2.</p> |
