| 摘要 |
<p>PROBLEM TO BE SOLVED: To lower the exchanging position of a gas cylinder. SOLUTION: A supporting frame 4 on which a cylinder retaining frame 5 is assembled in such manner that it can be drawn out to a point side, is rotatable on a basic end as a fulcrum, the cylinder retaining frame 5 comprises a stopper 7 to be rocked to the supporting frame 4 with the minimum drawing length, a part lower than the rotating fulcrum, of the supporting frame 4, and a slot 8a of a guide plate fixed to the cylinder retaining frame 5, are connected with a supporting rod 9, and the supporting rod 9 is positioned on an end part of the slot at the side where the cylinder retaining frame 5 keeps the minimum drawing length, to retain the supporting frame in the horizontal position, when the cylinder retaining frame 6 is rocked. When the cylinder is exchanged, the stopper 7 is released, and the cylinder retaining frame 5 is rotated downward while shifted in the drawing direction, and further lowered by the amount corresponding to the slot 8a.</p> |
