| 摘要 |
A packaging machine has a roll supporting device with a support shaft rotatably supporting a film roll which extends in an axial direction, an elongated bag-forming film being wrapped around the film roll, a bag forming device which pulls out the film from the film roll and forms the film into a shape of a bag, a packaging device for filling the bag-shaped film with articles to be packaged and sealing the film to produce a package, a roll displacing mechanism for displacing the roll supporting device in the axial direction, and a roll position controller for controlling the roll displacing mechanism to adjust the position of the roll supporting device. The bag forming device includes a former for bending the film into a tubular form and a former roller for guiding the film to the former. As a former of a different size is installed, depending on the width of the film, the position of the former roller is changed by a former roller discharging mechanism which includes a first mechanism for supporting the former roller and moving it to a plurality of different positions with respect itself and a second mechanism for moving the first mechanism to a plurality of different positions in the same direction.
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