| 摘要 |
PURPOSE:To achieve automatic opening and closing of a lid of a barrel, by holding always a slide lever at such a position that an edge of a second cam is in bridging engagement with a groove of a first cam, and causing the edge of the second cam, by application of an external force, to be moved from the groove of the first cam toward the side of a rotary shaft. CONSTITUTION:A slide lever 15 is held at a stationary position by means of a spring 16, wile an edge of second cam 18 is in bridging engagement with a groove 14 of a first cam 13. When the lever 15 is moved by application of an external force, causing the edge of the second cam 18 to be moved from the groove 14 of the first cam 13 toward the side of a rotary shaft 2, then the bridging engagement with the groove 14 is disengaged. When a barrel 1 is rotated in a direction of an arrow, a cam follower 21 having been moved on the periphery of the cam 13 comes along a third cam 19 to the groove 14 and falls thereinto. Then, when the barrel is rotated in a reverse direction, since the cam follower 21 is remaining in the grove 14, a lid opening and closing lever 20 falls, following the rotation of the barrel 1, in a direction opposite to an opening of the barrel, so that, at the same time, a lid 3 is caused to open inwardly of the barrel 1 and opened completely. |
