JP2003237719A - Method for folding and laminating closed sealing part of box-shaped package thereon and device for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method which prevents the occurrence of wrinkles due to thermal pressure and prevents the occurrence of a gap between a closed seal and the upper surface of a box-shaped package when a band-shaped closed seal including the overhangs of the upper ends of the box-shaped package is folded down so as to laminate the overhangs on the side surfaces of the closed seal, and also to provide a new device used for the same. <P>SOLUTION: The box-shaped packages are intermittently carried on a conveyer while being sequentially filled with tea bags or the like in a group of a predetermined number. The package has an opening provided with overhangs on both the sides thereof. Both the overhangs are abutted and sealed in a band shape, and then the band-shaped closed seal is folded down toward the side surfaces of the package (1). The external surfaces of both the sides of the box-shaped package under the overhangs on both the sides of the closed seal are preheated enough for fusion, and the overhangs on both the sides are folded down and superposed upon the external surfaces of both the sides of the package, thus the overhangs and the external surfaces are internally fused with each other. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for folding and sealing a closing seal portion of a box-shaped package.

[0002]

2. Description of the Related Art Conventionally, a box-shaped package p of this type is shown in FIG.
After filling the contents such as tea bag as shown in 1,
The heat seal s is closed in a strip shape by abutting the openings at the upper end,
This is folded down to one side, and the overhanging portions on both sides are folded down on both outer surfaces of the box-shaped package p, and strong heat and pressure are applied so as to melt the inner surface from the outer side to perform the welding.

[0003]

However, there is a problem in that the outer surfaces of both sides of the overhanging portion are melted and the welded wrinkle χ is generated by strongly heat-pressing the folded overhanging portion from the outside and welding the folded overhanging portion. There is a problem that the strip-shaped closed seal portion floats above the upper surface of the box-shaped package p and a gap is formed between the band-shaped closed seal portion and the upper surface of the box-shaped package p to impair the appearance.

[0004]

SUMMARY OF THE INVENTION The present invention provides a box-shaped package in which an overhanging portion is folded and heat-welded to the outer surfaces of both sides of the box-shaped package in advance, and pre-heatable for welding is applied to the box-shaped package. The above problem is solved by pressing it against the upper surface of the plate and folding the overhanging parts against the preheated outer surfaces of both sides to weld the inner surface.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A box-shaped package 1 contains contents such as tea bags t on a conveyor 2 as shown in FIG.
After sequentially filling with a fixed number such as 0, the upper opening 1a
Are butt-jointed in a strip shape and run intermittently in a state where the closing seal 1b is provided. Reference numerals 1c and 1c denote overhanging portions that are closed and sealed in a laterally protruding band shape, and 1d denotes an opening and closing chuck band used for opening and closing after opening.

As shown in FIG. 2, the apparatus of the present invention includes the overhanging portions 1c, 1c at a position above the conveyor 2 so as to fold the closing seal 1b to one side and at the same time stably support the box-shaped package 1. Upper presser bar 3 and overhang 1
Lower support bar 4 that prevents c and 1c from hanging down to the side
a, 4b, and two sets of preheating tools 5a, 5b provided on both sides of the conveyor 2 so as to be able to move forward and backward, folding tools 6a, 6b for folding the overhanging portions 1c, 1c downward, and the overhanging portion 1c,
2 sets which are provided with the sandwiching guide rails 7a and 7b for suppressing the upward movement of 1c, press the folded overhanging portions 1c and 1c against the side surface of the preheated box-shaped package 1 which can be welded, and heat the outer surface so that it does not melt Push heating tools 8a, 8b,
Further, an upper surface pressing member 9 is provided at the center of the conveyor 2 to press the closed seal portion 1b, which is tilted to one side, onto the upper surface of the box-shaped package 1 without a gap and to come into contact therewith.

In the box-shaped package 1 which runs intermittently in parallel on the conveyor 2, as shown in FIGS. 3 to 4, the closing seal portion 1b is folded down and held by the upper pressing bar 3 and the lower supporting bar 4a, A part of both side surfaces 1e, 1e of the box-shaped package 1 can be welded by heating the preheating tools 5a, 5b which are advanced from the side in a stable posture in which the lower surfaces of the overhanging portions 1c, 1c are supported by 4b. It is preheated to a semi-molten state. The overhanging portion 1c,
It is prevented that the overhanging portions 1c, 1c hang down by supporting the 1c and hinder the operation of the preheating tools 3a, 3b. Although the preheating tool is provided in two sets in FIG. 2, it may be provided in one set or three sets.

Next, as shown in FIG. 6, the projecting portions 1c, 1c whose lower supports are unfolded by the downward movement of the folding tools 6a, 6b on the both sides 1e,
Fold down in the direction of 1e and continue to guide rails 7a, 7b
While suppressing the return of the overhanging portions 1c, 1c, the upper surface pressing member 9 which is moved down from the center substantially at the same time is folded over as shown in FIGS. As shown in FIG. 9, the inner surfaces of the overhanging portions 1c and 1c are semi-melted by the preheating of the side surfaces of the box-shaped package 1 by pressing on the upper surface and moving forward from the notches of the guide rails 7a and 7b by pushing heating tools 8a and 8a. The protruding portions 1c and 1c are welded to the inner surface by pressing against the outer surface portion. At this time, the overhanging portions 1c, 1 are pushed by the pushing heating tools 8a, 8b.
Since I tried to apply heat to the extent that the surface of c does not melt,
The semi-molten state of the preheated portions of the package side faces 1e, 1e is maintained, and the welding between the overhang portions 1c, 1c and the side faces 1e, 1e is ensured. After that, the inner surface welding is further stabilized by the same push heating by the other set of push heating tools 8b, 8b. After that, a cooling device (not shown) that lowers the temperature of the welded portion to quickly fix the molding state may be provided.

[0009]

As described above, according to the present invention, the preheating is applied as described above, and the overhanging portions on both sides of the band-shaped closing seal portion are folded against the outer surfaces on both sides of the box-shaped package so that the inner surface is welded. Welding wrinkles on both outer surfaces of the box-shaped package, which had been caused by welding by applying strong heat and pressure from above, are eliminated, and the band-shaped closing seal is pressed onto the top surface of the box-shaped package, and the overhanging part is Since it is welded to both outer surfaces of the box package by folding it, the folded strip-shaped sealing seal floats above the top surface of the box package and eliminates the gap between the top surface of the box package and the appearance. The effect is that a very good box package can be provided.

[Brief description of drawings]

FIG. 1 Diagram showing a box-shaped package

FIG. 2 is a plan view of the device of the present invention.

FIG. 3 is a side view showing a supporting state of an overhang portion by an upper presser bar and a lower support bar.

FIG. 4 is a partial front view showing a state in which both sides of the box-shaped package are preheated by a preheating tool.

FIG. 5 is a partial front view showing a state where the box-shaped package faces the bottom of the folding tool.

FIG. 6 is a partial front view showing a state in which the overhanging portion is folded down.

FIG. 7 is a partial front view showing a state where the strip-shaped seal folded by the top-face retainer is pressed against the top face of the box-shaped package.

FIG. 8 is a partial side view of the same.

FIG. 9 is a partially enlarged plan view showing a state in which an overhanging portion folded and folded by a pushing and heating tool is pushed and heated from the side to adhere the inner surface to the side surface of the box-shaped package.

FIG. 10 is a side view of the box-shaped package for which the pasting work has been completed.

FIG. 11 Conventional example diagram

[Explanation of symbols]

1 is a box package 1a is an opening 1b is a closed seal part 1c and 1c are overhanging parts 1d is an open / close chuck 2 is the conveyor 3 is the upper presser bar 4a and 4b are bottom support bars 5a and 5b are preheating tools 6a and 6b are folding tools 7a and 7b are guide rails 8a and 8b are push heating tools 9 is an upper surface retainer

Claims (5)

[Claims] 1. A box-shaped package, which is filled with a constant number of tea bags or the like on a conveyor in sequence and runs intermittently, is abutted in a strip shape with protruding portions on both sides, and the abutting portions are closed. After forming the band-shaped closing seal, the band-shaped closing seal is folded to one side, and preheating capable of being welded is given to the outer surfaces of both sides of the box-shaped package under the protruding portions on both sides, and the folded both sides are closed. A method for fold-attaching a closed seal portion of a box-shaped package, characterized in that the projecting portions of the package are folded on both sides of the package and welded on the inside. 2. The sticking method according to claim 1, wherein the overhanging portion is folded against the outer surface of the box-shaped package, and is pressed and heated from the outside to weld the inner surface. 3. The sticking method according to claim 1, wherein the folded band-shaped closing seal portion is pressed against the upper surface of the box-shaped package and the protruding portions on both sides are folded and welded. 4. Box-shaped packaging means for intermittently traveling by filling a constant number of tea bags or the like on a conveyor in sequence,
Means for abutting the upper end opening of the box-shaped package by holding the overhanging portions on both sides, means for closing and sealing the strip-shaped abutting portion, and folding it to one side, and a box-shaped package under the overhanging portions on both sides. And a means for applying preheating capable of welding to the outer surfaces of both sides of the package, and means for folding the folded overhanging portions on both sides to the outer surfaces of both sides of the package to weld the inner surfaces thereof. Folding and sticking device. 5. The sticking device according to claim 4, further comprising means for pressing the band-shaped folded closed seal portion against the upper surface of the box-shaped package and folding and welding the protruding portion.