| 摘要 |
PURPOSE: To avoid deformation of a housing body in a region of causing long- hour fastening of a driven shaft by arranging a bearing part of a flap plate in an additionally stress-unapplied region on the basis of the inhomogeneous pressure distribution in the housing body caused by a service opening. CONSTITUTION: A quick-closing flap is provided with a housing body 2, a service opening 4 formed in the housing body 2, at least two bearing positions 17 arranged in the housing body 2 for a driven shaft 16 and a flap plate 11 cooperating with a detachable fitting ring 10 fixed to the driven shaft 16 so as to be turnable with the axis of the driven shaft as the center. In the form of arranging the bearing positions 17 outside a service opening region of causing the inhomogeneous stress distribution in the housing body, the driven shaft 16 has a connecting means compensating for axial dislocation and an angular deviation in a region between at least the two bearing positions 17.
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