Film roll replacement device, film roll supply method, and film roll removal method

A film roll supply method of supplying a film roll in which a film is wound around a hollow winding core to a bag making and packaging machine using a film roll replacement device, the bag making and packaging machine having a film-roll-supporting part configured to support the film roll and being configured to use the film to manufacture bags containing articles, the film-roll-supporting part having a supporting shaft that is configured to be inserted into the hollow winding core and that is configured to support the film roll, and the film roll replacement device having a holding section that is configured to be located adjacent to the supporting shaft of the film-roll-supporting part of the bag making and packaging machine in a direction in which the supporting shaft extends and that is configured to hold the film roll supplied to the bag making and packaging machine, a holding-section-driving unit configured to move the holding section, a first pushing member having a recess conforming to an outer shape of the supporting shaft, and a first-pushing-member-driving unit configured to move the first pushing member, the film roll supply method comprising steps of:

• the holding-section-driving unit moving the holding section in a first direction toward the film-roll-supporting part of the bag making and packaging machine to transfer the film roll held by the holding section to the film-roll-supporting part;
• the first-pushing-member-driving unit moving the film roll to the film-roll-supporting part by making the first pushing member push at least an end surface of the winding core in an end surface of the film roll, the first pushing member moving along the supporting shaft in a predetermined area.

A film roll removal method of removing a film roll in which a film is wound around a hollow winding core from a bag making and packaging machine using a film roll replacement device, the bag making and packaging machine having a film-roll-supporting part configured to support the film roll and being configured to use the film to manufacture bags containing articles, and the film roll replacement device having a holding section that is configured to be located adjacent to the bag making and packaging machine, a holding-section-driving unit configured to move the holding section, a pushing member, a pushing-member-driving unit configured to move the pushing member, and a measuring unit configured to measure a distance between the holding section and a surface of the film roll supported by the film-roll-supporting part;

• the film roll removal method comprising steps of:
• the holding-section-driving unit moving the holding section to be below the film-roll-supporting part,
• the measuring unit measuring the distance between the holding section and the surface of the film roll supported by the film-roll-supporting part;
• the holding-section-driving unit adjusting a height of the holding section based on the distance measured by the measuring unit,
• the pushing-member-driving unit driving the pushing member to bring the pushing member into contact with an end surface of the film roll supported by the film-roll-supporting part, and
• the pushing-member-driving unit driving the pushing member to push the end surface of the film roll in a first direction, and the holding-section-driving unit moving the holding section in the first direction from below the film-roll-supporting part, so as to move the film roll supported by the film-roll-supporting part to the holding section.