| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide storage trays which maintain a strength relative to an external force as to storage trays structured to change a vertical gap between the trays by changing the direction of the trays in stacking them. <P>SOLUTION: This relates to storage trays which are stackable contacting vertically closely when stacked vertically in the same direction and are stackable with a predetermined gap vertically when stacked vertically 180°in the opposite direction. Each of the inside wall 39b of the reinforcing ribs 34 of adjoining two sides and the outside wall 36a of the storage recess forming rib 33 of two sides is formed on the uneven face where inwardly receding recess 50, 51 and outwardly protruding protrusions 52, 53 are formed circumferentially in a continuity. When the trays are stacked vertically 180°in the opposite direction, the part which has the uneven face and the part which has no uneven face are placed adjoining vertically. By the uneven face, the outside wall 36a of the rib 33 and the inside wall 39b of the rib 34 are maintained vertically. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
