| 摘要 |
PROBLEM TO BE SOLVED: To obtain a stable opening shape of a spout fitting part 2 even in a bag with an unsealed top side part when both sides of the spout fitting part 2 of a bag 1, in which the spout fitting part 2 is formed by cutting a top side part 6 and a corner part of one side part 3, are gripped by a pair of left and right grippers 7, 7, the bag is transferred along a predetermined transfer path, and the spout fitting part 2 is opened on the transfer path.SOLUTION: After adsorbing films of both surfaces of a spout fitting part 2 with a pair of suction cups 8, 8 and opening the spout fitting part 2 by expanding the interval of the pair of suction cups 8, 8, gas is blown into a bag 1 from the spout fitting part 2 by a gas blowing member 9. At that time, the lower position of a gripper for gripping a top side part 6 side is gripped by gripping members 19 from both surfaces of the bag 1, and thus the gas blown into the bag 1 is prevented from flowing out from the top side part 6. An opening shape of the spout fitting part 2 is stabilized as the bag 1 inflates entirely and sufficiently, and can be maintained even when the suction cups 8, 8 are removed from the bag surface.SELECTED DRAWING: Figure 2 |
