| 摘要 |
<p>PURPOSE:For facilitating the release of wedging upon drawing-up, to place a rod member as fastening means rotatably in a the vertically-long groove inclined to open above the guide line of a guide mechanism on the back portion of a discharge device. CONSTITUTION:When a pump 1 is down, a rod member 10 is at the bottom portion of a long groove 9a and in linear contact engagement with the inner face of a fastener 4 at the upper and lower equal division line of the coupling surfaces of flanges 2 and 8 so as to couple said flanges 2 and 8 in close contact with each other. Even when said pump 1 is set in motion and discharge pressure is generated, no leakage occurs to the coupling surfaces of said flanges 2 and 8 since the rotational force of said pump 1 on engagement point does not occur at all depending on said discharge pressure. When said pump 1 is drawn up, said rod member 10 rises together with said fastening member 4 which slightly turning said long groove 9a by the friction thereof. Since said long groove 9a is inclined to open above a guide rod 7, however, the frictional force with factening member 4 decreases quickly so that a small force is required to draw up said pump 1.</p> |
