Cardboard box dividing device and cardboard box production device

A cardboard box dividing device for cutting and dividing, along a width direction intersecting with a transport direction, a connected cardboard box laminate in which a plurality of connected cardboard box bodies continuous along the transport direction are stacked in a thickness direction, the cardboard box dividing device comprising:

• a lower conveyor on which the plurality of connected cardboard box bodies are stacked and transported;
• an upper conveyor disposed so as to face the lower conveyor from above and supporting upper portions of the plurality of stacked connected cardboard box bodies;
• a press pressing, from above, the plurality of connected cardboard box bodies stacked on the lower conveyor;
• a cutting knife disposed along a width direction of the connected cardboard box body and dividing the plurality of connected cardboard box bodies stacked on the lower conveyor into a front part and a rear part;
• and
• a lifting/lowering device relatively moving the plurality of connected cardboard box bodies on the lower conveyor and the cutting knife along an up-down direction,
• wherein the upper conveyor is configured to directly contact and support the upper portions of the plurality of stacked connected cardboard box bodies before the dividing, and
• a sub-press of the press is configured to directly contact, press, and support the upper portions of the plurality of stacked connected cardboard box bodies during the dividing,
• the lifting/lowering device has
• a lifting/lowering base supporting the lower conveyor, the upper conveyor, and the press, and
• a lifting/lowering driver lifting and lowering the lifting/lowering base,
• the upper conveyor is supported by the lifting/lowering base so as to be movable up and down,
• the press has the sub-press and a pressing driver moving the sub-press, the sub-press is supported by the lifting/lowering base so as to be movable up and down, and the upper conveyor is supported by the sub-press so as to be movable up and down, and
• the sub-press and the upper conveyor are configured to press the plurality of stacked connected cardboard box bodies at different times at a location that the sub-press and the upper conveyor are overlapping in the transport direction.