| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a membrane-type gas meter capable of precisely metering gas by strengthening the press-in fixation of a wing shaft by thickening the hub diameter of the edge of a wing and reducing the interference between a metering diaphragm and the hub of the wing edge without changing the shape of a body case. Ž<P>SOLUTION: The membrane-type gas meter includes, in a body case 9, the metering diaphragm reciprocating by the supply and discharge of gas; and a wing made of a resin for changing the reciprocating motion of the metering diaphragm to rotary motion. The membrane-type gas meter also includes, in an upper case coupled onto the body case, a link mechanism for transmitting the rotation of the wing shaft provided in the wing to a counter section. Then, the wing shaft is press-fitted and fixed to a cylindrical hub 20 integrally formed with the wing 17, and a part in contact with the metering diaphragm of the hub is set to be a surface 22 of conformity in a shape to the membrane regulation section of the body case. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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