| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a check valve having a simple structure and no suction loss and to provide a compression bag which has such a check valve and, thereby, can be easily treated. <P>SOLUTION: The check valve comprises: a base member which is attached to a fitting hole piercing the compression bag and has a first air hole on the center part; an operation member rotatably fitted to the base member; an elevating and lowering member which can be elevated and lowered by rotation operation of the operation member; and a valve body elevatably and lowerably fitted to the elevating and lowering member, wherein a second air hole pierces the elevating and lowering member, a third air hole permeates the operation member, the elevating and lowering member is elevated by the operation member, thereby, a gap in which the valve body can be elevated and lowered is formed and, when the internal pressure of the compression bag becomes an atmospheric pressure or more, the valve body is elevated by the high pressure, the first air hole is opened, the interior of the compression bag is releasably communicated with the air via the second air hole and the third hole and, when the internal pressure of the compression bag becomes the atmospheric pressure or less, the valve body closes the first air hole by own-weight and the pressure difference, the operation member performs rotation operation to lower the elevating and lowering member, and the valve body can seal airtightly the first air hole. <P>COPYRIGHT: (C)2012,JPO&INPIT |
