| 摘要 |
<p>PURPOSE:To set a cap on a vessel body very easily as well as to manufacture it so simply without using any complex manufacturing mold. CONSTITUTION:This reservoir tank 1 is provided with a vessel body 2 capable of storing a liquid via an opening 4 and a cap 3 being detachably attached to the vessel body 2 and closing the opening 4 at time of attachment. At time of attaching the cap 3, a pair of projections 22 formed on an inner surface of the cap 3 is engaged with each upper edge of respective projecting strips 23 formed on an inner circumferential surface of the opening 4 over the specified angular range. An incline 24 tilting from an upper edge to a lower one of each guide projecting strips 23 makes each projection 22 move to a lower edge of another guide projecting strip 23 adjoined with turning operation of the cap 3 within one rotation. A stopper 25 is formed in an end of another guide projecting strip 23 adjoined, and thereby it is engaged with each projection 22 moved along the incline 24, thus the movement and flotage are checked.</p> |
