Method of manufacturing contents-filled packaging container
A packaging container-filler member includes: a front-side sheet and a back-side sheet disposed to oppose each other; a first connecting sheet connecting outer edges of the front-side and back-side sheets on a first side in a first direction along the front-side sheet; a second connecting sheet connecting outer edges of the front-side and back-side sheets on a second side in the first direction; and a third connecting sheet connecting outer edges of the front-side and back-side sheets on a first side in a second direction along the front-side sheet, the second direction crossing the first direction. The front-side and back-side sheets, and the first and second connecting sheets constitute a cylindrical body whose cross section is rectangular when the cylindrical body has a three-dimensional shape. The first, second and third connecting sheets are each folded in an opposing direction in which the front-side and back-side sheets oppose each other.
1 . A method of manufacturing a contents-filled packaging container, in which a packaging container is filled with contents,
the packaging container, includes:
a packaging container-filler member; and
a bag body provided with an opening facing a predetermined side and accommodating the packaging container-filler member,
the packaging container-filler member, includes:
a front-side sheet and a back-side sheet disposed to oppose each other;
a first connecting sheet connecting outer edges of the front-side sheet and the back-side sheet on a first side in a first direction along the front-side sheet;
a second connecting sheet connecting outer edges of the front-side sheet and the back-side sheet on a second side in the first direction; and
a third connecting sheet connecting outer edges of the front-side sheet and the back-side sheet on a first side in a second direction along the front-side sheet, the second direction crossing the first direction,
the front-side sheet, the back-side sheet, the first connecting sheet, and the second connecting sheet constitute a cylindrical body whose cross section is rectangular when the cylindrical body has a three-dimensional shape,
the first connecting sheet, the second connecting sheet, and the third connecting sheet are each folded in an opposing direction in which the front-side sheet and the back-side sheet oppose each other, and
the packaging container-filler member is disposed such that a second side thereof in the second direction is the same as the predetermined side,
the method, comprising:
opening peripheral edge portions facing each other of the opening of the bag body;
deforming the first connecting sheet, the second connecting sheet, and the third connecting sheet so as to extend in the opposing direction inside the bag body;
filling the contents between the front-side sheet and the back-side sheet of the packaging container-filler member through the opening of the bag body:
closing the opening of the bag body;
after deforming the first connecting sheet, the second connecting sheet, and the third connecting sheet, and before filling the contents, bending a side flap extending outward from a first surface of the bag body by a pressing force from an outside to adhere the side flap to the first surface, the first surface of the bag body corresponding to the first connecting sheet or the second connecting sheet, wherein
when adhering the side flap to the first surface, the third connecting sheet deformed and extending in the opposing direction supports the first surface of the bag body.
2 . The method of manufacturing a contents-filled packaging container according to claim 1 , wherein
the first connecting sheet is folded to be convex from the second side toward the first side in the first direction,
the second connecting sheet is folded to be convex from the first side toward the second side in the first direction, and
the third connecting sheet is folded to be convex from a second side toward the first side in the second direction of the front-side sheet and the back-side sheet.
3 . The method of manufacturing a contents-filled packaging container according to claim 1 , wherein
the third connecting sheet includes:
a first connecting piece connected to the outer edge of the front-side sheet on the first side in the second direction through a first hinge, and
a second connecting piece connected to an outer edge of the first connecting piece through a second hinge and connected to the outer edge of the back-side sheet on the first side in the second direction through a third hinge.
4 . The method of manufacturing a contents-filled packaging container according to claim 1 , further comprising:
after adhering the side flap to the first surface, and before filling the contents, bending a protruding portion extending outward from a second surface of the bag body by a pressing force from an outside to adhere the protruding portion to the second surface, the second surface of the bag body corresponding to the third connecting sheet, wherein
when adhering the protruding portion to the second surface, the first connecting sheet and the second connecting sheet deformed and extending in the opposing direction support the second surface of the bag body.
5 . A method of manufacturing a contents-filled packaging container, in which a bag body of a packaging container accommodating a packaging container-filler member is filled with contents, wherein
the packaging container-filler member includes:
a front-side sheet and a back-side sheet disposed to oppose each other;
a first connecting sheet connecting outer edges of the front-side sheet and the back-side sheet on a first side in a first direction along the front-side sheet;
a second connecting sheet connecting outer edges of the front-side sheet and the back-side sheet on a second side in the first direction; and
a third connecting sheet connecting outer edges of the front-side sheet and the back-side sheet on a first side in a second direction along the front-side sheet, the second direction crossing the first direction,
the method comprising:
opening peripheral edge portions facing, in an opposing direction, each other of an opening of the bag body, the opposing direction being in which the front-side sheet and the back-side sheet oppose each other;
deforming the first connecting sheet, the second connecting sheet, and the third connecting sheet so as to extend in the opposing direction inside the bag body and pressing a heater block against the packaging container in the first direction to form a protruding portion in the bag body, the protruding portion further protruding toward the first side in the second direction than the third connecting sheet of the packaging container-filler member;
pressing a heater block against the packaging container from the first side in the second direction toward a second side in the second direction to weld the protruding portion to a surface of the bag body facing the first side in the second direction; and
filling the contents between the front-side sheet and the back-side sheet of the packaging container-filler member through the opening of the bag body, and closing the opening of the bag body.