| 摘要 |
PURPOSE:To improve the workability of detaching and attaching an air- straightening lattice by securing an expandable ring to the cylindrical end of a flexible duct body, detachably mounting a duct by utilizing the elongation of a material, and mounting an air-straightening lattice at the mounting unit. CONSTITUTION:In a flexible duct for coupling a duct 4 with a flange, a duct 5 coupled with a phase flange and a duct 6, a duct body is formed in a bellow structure 1, and cylindrical portions 3a, 3b are formed at both ends. An expandable ring 10 is secured to the hole of at least one portion 3a. An air-straightening lattice 11 is detachably mounted in the duct 5 or in the portion 3a, the portion 3a is connected in a tight state with the duct 5 by utilizing the elongation of the material, and a clamping ring 7 is detachably secured thereonto. |
