| 摘要 |
<p>An operation aid for reducing force for operating a piston-type manual pump. The operation aid is retrofittable to a piston-type manual pump available in marketplace to facilitate pumping work. The operation aid for a piston-type manual pump can be attached to a storage container (D) by fitting a screw fitting member (4) to a mouth section of the storage container (D), where the screw fitting member (4) is rotatably provided at a suction pipe section (3) extending from a pump body (2). Reciprocating a piston rod (5) projecting from the pump body causes a piston in the pump body to operate to pump out liquid. The operation aid has a support plate (11), a strut (12), a rocking arm (13). The support plate (11) has an opening at which the mouth section of the storage container and the screw-fitting member are screwed to each other, and the support plate (11) is fixed in place by screwing the screw-fitting member to the mouth section through the opening. The strut (12) is raised on the support plate. The rocking arm (13) has a support point (13a) supported by the strut, a power point (13b) to which force is applied, and a working point (13c) provided at a position obtained by dividing internally or externally the section between the support point and the power point. The piston rod (5) is connected to the working point (13c).</p> |
