Title:
SEAL STRUCTURE
Document Type and Number:
Japanese Patent JP2018200083
Kind Code:
A
Abstract:
To provide a seal structure hardly causing water penetration, and facilitating integrating a seal member comprising a water-absorbing expansible material with an outer pipe 11.SOLUTION: An interval between an outer pipe 11 and an inner pipe inserted into the inside of the outer pipe 11 is sealed. A pair of seal members comprising a first seal member 21 and a second seal member 22 adjacent to each other in a pipe axial direction are held between the outer pipe 11 and the inner pipe. The first seal member 21 and the second seal member 22 are integrated with an outer pipe 11 inner peripheral surface. The first seal member 21 and the second seal member 22 each comprise a strip comprising a water-absorbing expansible material, and have such a ring shape that both end parts of the strip are butted. A second seal member 22 side end point 21b of a butting line 21a of the first seal member 21, and a first seal member 21 side end point 22b of a butting line 22a of the second seal member 22 are off-set in the circumferential direction of the pipe.SELECTED DRAWING: Figure 1
Inventors:
FUJIMOTO YUICHI
Application Number:
JP2017105587A
Publication Date:
December 20, 2018
Filing Date:
May 29, 2017
Export Citation:
Assignee:
TIGERS POLYMER
International Classes:
F16L33/00; H02G3/06