To provide a penetration duct member which can securely intercept a space in a wall from the outside and retain air-tightness regardless of the condition of a through-hole of a hollow wall.
An exterior flange 4 is formed on the end part side of the outer periphery on one side of a synthetic resin-made pipe material 1 having flexibility and elasticity, and an interior flange is integrally provided to the side closer to the midsection than the exterior flange 4. An outer peripheral groove having nearly the same groove width as the thickness of an inner wall member is formed on the interior flange. Then an interior flange is integrally provided in a location more distance from the interior flange than the hollow space in the wall on the outer periphery on the other side of the pipe member. An insertion guide part is integrally formed on the side closer to the end part than the interior flange, and inner peripheral grooves 8, 9 are formed on the inner peripheral surfaces of both of the interior flanges 5, 6 of the pipe member 1 respectively. The inner peripheral grooves 8, 9 are spread in the thick wall of the interior flanges 5, 6 respectively, and a bellows-like flexible part 2 is formed between both of the interior flanges 5, 6. The bellows-like flexible part 2 is longer than the space between an exterior wall material and an interior wall material, and includes a length which fits within the space when shrunk. The bellows-like flexible part 2 includes a thickness which undergoes flexible deformation and which makes possible restoration.
JP2007321967A | 2007-12-13 | |||
JPS55179276U | 1980-12-23 | |||
JPS6431280U | 1989-02-27 | |||
JP2007321967A | 2007-12-13 | |||
JPS55179276U | 1980-12-23 | |||
JPS6431280U | 1989-02-27 |
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