DIAPHRAGM COUPLING

PROBLEM TO BE SOLVED: To provide a diaphragm coupling in which its outer peripheral guard part is hardly deformed even if the coupling is rotated at a high speed, it maintains an interference and an action for holding the diaphragm from its outer peripheral side is sufficiently realized.SOLUTION: This invention relates to a diaphragm coupling in which a center tube is coaxially connected through a diaphragm between a pair of flanges opposing to each other in an axial direction and there is provided an annular guard for holding the diaphragm between the flanges. The guard is integrally provided with a cylindrical outer peripheral guard part fitted with interference against the outer peripheral surface of the diaphragm and an outer peripheral surface of the flange at an outer peripheral end part of a rising-up part in its radial direction. The outer peripheral guard part has a shape in which a root part near the rising-up part in the radial direction shows a larger thickness in the radial direction than that of the extremity end part.SELECTED DRAWING: Figure 2 【課題】カップリングが高速で回転しても外周ガード部が変形しにくく、締め代を維持し、ダイアフラムをその外周側から保持する作用を十分に発揮するダイアフラムカップリングを提供する。【解決手段】互いに軸方向に対向する一対のフランジ間にダイアフラムを介してセンターチューブを同軸的に連結してなるダイアフラムカップリングであって、フランジとの間にダイアフラムを挟み込む環状のガードを備える。ガードはその径方向立ち上がり部の外周端部に、ダイアフラムの外周面およびフランジの外周面に対し締め代をもって嵌合する筒状の外周ガード部を一体に備える。外周ガード部は、径方向立ち上がり部に近い根元部のほうが先端部よりも径方向厚みが大きい形状を備える。【選択図】図２