| 摘要 |
<p>[PROBLEMS] To provide an inert gas placing method for a gas- filling and packaging machine, in which troubles occurring when a gas-filling nozzle is inserted into a packaging bag are eliminated and in which a gas replacement rate is increased. [MEANS FOR SOLVING PROBLEMS] A gas-filling nozzle (23) is provided at a filling funnel (21) in correspondence with each grip (9) of a rotating body, and the gas-filling nozzle (23) has a forward end (23b) controlled by a nozzle attitude control means (25) so as to approach or recede from an imaginary normal line v passing through the center of the drop opening of the filling funnel. In the process preceding a filling process, the drop opening of the filling funnel and the forward end of the gas-filling nozzle brought close to the normal line v are inserted from the opened bag opening b into a package bag a, and at the same time, the forward end is separated from the normal line v and moved toward a corner of the package bag. In the process following the filling process, inert gas jetted from the gas filling nozzle and air in the package bag are replaced with each other, and in a postprocess on the downstream side, the replacement action between the inert gas and the air is promoted with the bag opening b substantially closed by a shutter means (65).</p> |
