JP3664389B2 - Method and apparatus for folding and sticking a closed overhang portion of a box-shaped package - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a method for folding and sticking a closed overhang portion of a box-shaped package and an apparatus therefor.
[0002]
[Prior art]
Conventionally, this type of box-shaped package p is filled with contents such as a tea bag as shown in FIG. 11, and then the opening at the upper end is abutted with the overhangs on both sides to close the heat seal s. After being folded down, the overhanging portions on both sides are folded on the outer surfaces on both sides of the box-shaped package p, and heat and pressure are applied from the outside so as to be welded to both outer surfaces .
[0003]
[Problems to be solved by the invention]
However, there is a problem that when the folded overhang portion is welded to the outer surfaces on both sides by heat and pressure from the outside, the outer surface of the overhang portion is also melted to produce weld wrinkles χ.
[0004]
[Means for Solving the Problems]
In the present invention , a constant number of tea bags or the like are sequentially filled in a box-shaped package on a conveyor, and the upper end opening of the box-shaped package is abutted with the overhanging portions on both sides to seal and close, and is folded to one side. In a packaging method for a tea bag or the like in which the overhanging portion is folded onto the side surface of a box-shaped package and thermally pressurized and welded to the side surface, the overhanging portion folded down to one side after sealing is closed The preheating tool is advanced from the side without being hindered by the drooping of the overhanging portion so as to prevent drooping by supporting it with Next, fold the overhanging part unsupported by a folding tool that moves downward onto the side surface, and push the overhanging part with a heating tool that is heated to the extent that the outer surface of the overhanging part does not melt. Welded to the inner surface of該張out portion side surface, so as not to cause welding wrinkles by melting the outer surface of該張out portion is had to solve such problems.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, the box-shaped package 1 is filled with contents such as tea bags t in order of a constant number such as 10 pieces, and then the opening 1 a at the upper end is abutted in a band shape to form a closing seal 1 b. Reference numerals 1c and 1c denote projecting portions protruding on both sides of the closing seal 1b, and reference numeral 1d denotes an opening / closing chuck band used for opening and closing after opening.
[0006]
The apparatus of the present invention includes an overhanging portion 1c, 1c at a position above the conveyor 2, as shown in FIG. 2, and folds the closing seal 1b to one side and simultaneously supports the box-shaped package 1 stably. A presser bar 3 and support bars 4a and 4b for supporting the overhanging portions 1c and 1c are provided, and two sets of preheating tools 5a and 5b provided on both sides of the conveyor 2 so as to freely advance and retract, and the overhanging portions 1c and 1c are boxed. Folding tools 6a and 6b that move up and down to be folded on the side surface of the package 1 and sandwiching guide rails 7a and 7b that prevent the protruding portions 1c and 1c from returning upward are provided, and the inner surfaces of the folded protruding portions 1c and 1c two sets of press heating device 8a is welded to the side surface of the box-shaped package 1, 8b, and a top retainer 9 for pressing without gaps folded defeated occlusive seal portion 1b on the upper surface of the box-shaped package 1 provided There.
[0007]
The box-shaped package 1 that runs intermittently in parallel on the conveyor 2 is sequentially filled with a fixed number of tea bags, etc. from the upper end opening, and then the upper end opening is sealed together with the overhanging portions on both sides. As shown in FIG. 4, the upper presser bar 3 folds and closes the closing seal portion 1b to one side together with the overhang portions 1c and 1c, and supports the lower surfaces of the overhang portions 1c and 1c with the lower support bars 4a and 4b. A semi-molten state in which a part of both side surfaces 1e and 1e of the box-shaped package 1 is preheated and welded by preheating tools 5a and 5b that advance from the side in a stable posture state that prevents sagging. To do. Since the overhanging portions 1c and 1c are supported by the lower support bars 4a and 4b to prevent the drooping, the preheating tools 3a and 3b can advance without any obstacles and can be welded by preheating both sides of the box-shaped package 1. A semi-molten state. In FIG. 2, the preheating tool is provided in two sets, but may be provided in one set or three sets.
[0008]
Next, the overhanging portions 1c and 1c are unsupported by the lower support bars 4a and 4b, and are attached to both side surfaces of the box-shaped package 1, that is, the side surfaces 1e and 1e in a semi-molten state that can be welded by the folding tools 6a and 6b that move downward. The upper seal 9 that is folded and restrains the protruding portions 1c and 1c from returning upward by the guide rails 7a and 7b, and closes the closing seal 1b as shown in FIGS. The overhanging portions 1c, 1c are pressed against the both side surfaces 1e, 1e by the pushing heaters 8a, 8a which are pushed onto the upper surfaces of the guide rails 7a, 7b and advance from the notches of the guide rails 7a, 7b. It is welded to the side . At this time, the push heaters 8a and 8b are pressed twice to stabilize the welding, and the push heaters 8a and 8b are heated to such an extent that the outer surfaces of the overhang portions 1c and 1c are not melted. , 1c does not melt and therefore does not create weld lines. In addition, this invention may be equipped with the cooling device (not shown) which lowers | hangs the temperature of a welding part after that and fixes a box-shaped package rapidly.
[0009]
【The invention's effect】
In the present invention, before the overhanging portion with the seal closed as described above is folded against the side surface of the box-shaped package, the overhanging portion is supported by the support bar to prevent the overhanging portion. Proceeding without any obstacles by applying preheating to both sides of the box-shaped package to make it in a semi-molten state that can be welded, and then folding the overhanging part with the unsupported on the side so that the outer surface does not melt Since the overhanging part was pressed and welded with a press heating tool having a certain degree of heat, the outer surface of the overhanging part did not melt, and therefore, only the inner surface was welded to the side surface without forming welding wrinkles on the outer surface , There is an effect that it is possible to provide a box-shaped package having an extremely good appearance.
[Brief description of the drawings]
FIG. 1 is a view showing a box-shaped package. FIG. 2 is a plan view of the apparatus of the present invention. FIG. 3 is a side view showing a state in which an overhang portion is supported by an upper presser bar and a lower support bar. FIG. 5 is a partial front view showing a state in which preheating is applied to both side surfaces of the shape package. FIG. 5 is a partial front view showing a state in which the box-shaped package is opposed to the folding tool. FIG. Partial front view [Fig. 7] Same as above, partial front view showing a state where the band-shaped seal folded by the upper surface pressing tool is pressed against the upper surface of the box-shaped package [Fig. 8] Same as above, Partial side view [Fig. 9] Push heating tool FIG. 10 is a partially enlarged plan view showing a state in which the overhanging portion folded and folded by the side is heated from the side and adhered to the side surface of the box package. FIG. 10 is a side view of the box package after the pasting operation is completed. ] Conventional example [Explanation of symbols]
1 is a box-shaped package 1a is an opening 1b is a closing seal 1c, 1c is an overhang 1d is an opening / closing chuck 2 is a conveyor 3 is an upper presser bar 4a, 4b is a lower support bar 5a, 5b is a preheating tool 6a, 6b is a folding tool 7a and 7b are guide rails 8a and 8b are push heaters 9 is an upper surface presser

Claims (2)

A constant number of tea bags and the like are sequentially filled in the box-shaped package on the conveyor, the upper end opening of the box-shaped package is abutted together with the overhanging portions on both sides, the seal is closed, and the box-shaped package is folded to one side. In a packaging method such as a tea bag in which the overhanging portion is folded on the side surface of the box-shaped package and welded to the side surface by heat and pressure, the overhanging portion that is sealed and folded to one side is supported by a support bar. In order to prevent sagging, the preheating tool is advanced from the side without being hindered by sagging of the overhanging portion to give preheating to the side surface of the box-shaped package to be in a semi-molten state that can be welded, Next, the overhanging portion, which has been unsupported by the folding tool that is moved downward, is folded on the side surface, and the overhanging portion is pushed by a heating device that is heated to such an extent that the outer surface of the overhanging portion does not melt. The inner surface of the parts welded to the side surface, folding against sticking method occlusion overhang of box-shaped package, characterized in that so as not to cause the welding wrinkles by melting the outer surface of 該張 out portion. Box-shaped package means for sequentially filling tea bags or the like on the conveyor and traveling intermittently, means for closing the upper end opening of the box-shaped package together with the overhanging portions on both sides, and the seal closing portion Means for folding the side part of the box-shaped package into a semi-molten state capable of being welded by advancing from the side, A closed overhanging portion of a box-shaped package comprising means for folding the overhanging portion on the side surface of the semi-molten that can be welded, and means for a pushing heater for welding the inner surface of the overhanging portion to the side surface. Folding and sticking device.

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