JP2001080628A - Flanged container and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To materialize high watertihghtness, airtightness and high shape- rigidity and a low manufacturing cost which have been unexpectable hitherto for a sealed-up type flanged container for packing foods or the like by a method wherein new devices are applied to a planar shape and arrangement of scores to a blank before fabrication. SOLUTION: A flanged container is made up by bending a blank a comprising a part 3 corresponding to a bottom, parts 2 connecting to each of sides of the bottom and respectively corresponding to side walls, parts 1 respectively adjoining the outside of the side walls and respectively corresponding to flanges, and deformed sectorial parts c each formed without severance by integrally connecting a part 4 corresponding to a side wall flap and a part 5 corresponding to a flange flap provided at the outside of each of corners at each of the sides, and for such blank a, a plurality of scores are provided at each of the deformed sectorial parts or its vicinity, extending radially toward the outside with a pivotal point or its periphery of the sectorial part being a starting point, and a part of or all of the radial scores are formed, being buckled at the middle of their course extending toward the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flanged container obtained by bending a blank and a method for producing the container.

[0002]

2. Description of the Related Art A container obtained by bending a conventional blank has the following various problems. That is,
In the conventional example shown in FIGS. 1A to 1D, a flanged container a (hereinafter, referred to as a conventional container) is formed by bending a blank a mainly used for a storable processed food or the like. After filling the container a with the contents composed of the container body a and the lid sheet b, the lid sheet b is tightly fixed to the container a by means such as heat sealing. The main purpose of this type of container a is to prevent the sap of the contents from leaking to the outside for a long period of time, to prevent the invasion of bacteria and the like from the outside, and to prevent the invasion of oxygen which causes the deterioration of the contents. It is to stably maintain a possible airtightness.

[0003] Unfortunately, the conventional container "a" could not be hermetically sealed due to two problems arising from its shape production. First, since the boundary cut portion 6 between the flange flap 5 and the side wall flap 4 at the back corner of the container a shown in FIG. 1C is structurally cut off from both flaps 5.4, A cut end communicating with the inside and outside of the container (hereinafter referred to as a communication hole) is inevitably generated. Next, at the joint 7 between the flange flap 5 and the flange 1 at the corner of the container a shown in FIG. 1B, since the two flaps 5 and the flange 1 have a step, the container is irrespective of the adhesive fixation to the lid sheet. (a) The occurrence of a triangular cylindrical hole (hereinafter referred to as a communication hole) due to a step and a sheet communicating with the inside and outside can not be avoided. Conventional container a
The flange flaps 5 and the side wall flaps 4 have an independent structure that does not support each other at the time of bending, and the side wall flaps 4 are not axially symmetrical and are fixed tightly to the side wall 2 on one side. As a result, the rigidity in the out-of-plane direction is low and the structure is unstable due to poor stress. Therefore, the rigidity in each direction at the corner of the container a does not improve so much. The thick paper described above had to be used.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a blank a in the field of food packaging materials.
In a closed-type flanged container a obtained by bending the container a, without significantly changing the method of assembling the conventional container a, by adding a new device to the planar shape and the ruled line arrangement of the blank a before assembly, An object of the present invention is to realize a low-cost flanged container a with high water, airtightness and high shape rigidity, which have not been expected so far.

[0005]

In order to achieve the above object, a blank a for forming a flanged container a of the present invention is provided.
And a side wall equivalent part 2 adjacent to each side thereof and a flange equivalent part adjacent to the outside thereof, and a side wall flap equivalent part 4 and a flange flap outside the corner of each side. That is, a deformed fan-shaped portion c that is continuously integrated without separating the corresponding portions 5 from each other is provided.

Preferably, in the deformed fan-shaped portion c, a plurality of ruled lines are provided radially outward with a vicinity of a required portion of the fan-shaped portion as a base point, and a part or all of the radial ruled lines extend outward. It is to be provided in a waist-folded shape in the middle of the operation.

[0007] Preferably, the deformed fan-shaped portion c is bent out so as to be drawn to the outside or inside of the container and to have the center line of the fan-shaped portion c passing through the center thereof as the axis of symmetry.

More preferably, after the deformed fan-shaped portion c and its peripheral portion are formed in each ruled line and bent, the flange flaps 5 themselves are adhered and fixed to each other, and the end of the flange 1 is lined. Thus, a three-dimensional structure c obtained by being bonded and fixed to the flange flap 5 is provided.

Still more preferably, a bent-formed container a with a flange fixed thereto is provided by laminating a single leaf sheet on all of the upper surface of the flange 1, the inner surface of the side wall portion, and the inner surface of the bottom portion 3. That is. Then, a specific manufacturing method, which is separately illustrated, for forming the article “a” having the above configuration is to be implemented.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

In FIGS. 1, 2, 3, 4, 5, and 6, the ruled lines in the plan view of the blank a are solid broken lines and broken dotted lines, and thick solid lines around the figure indicate contour lines. What characterizes the container a is the three-dimensional structure c that forms each corner thereof. The three-dimensional structure c is characterized in that the flat plate is formed by bending on ruled lines without any cuts or seams and is restored to the original flat plate by expansion, that is, it is a pure geometric shape. It is a typical example of a folded plate structure supported by a planar shape and a method of forming the folded shape.

FIGS. 2 to 7 show various containers having the three-dimensional structure c of the blank a of the present invention.
The basic configuration of the planar shape and the basic procedure of the bending method are common to each other. Specifically, in the plan view (a) of the blank a shown in the embodiment of each figure, a deformed fan-shaped part c is provided by being continuously integrated without separating the side wall flap equivalent part 4 and the flange flap equivalent part 5. A plurality of ruled lines that radially divide the fan-shaped portion c are provided, and the three-dimensional structure obtained by bending on the ruled lines is taken out of the container a and the bottom surface 3 of the container a This is to be fixed at an upper predetermined portion formed by being divided into right and left with a line segment connecting both corners of the flange 1 as a symmetric axis.

Although not shown, a deformed fan-shaped portion c provided with each ruled line so as to be taken out of the container,
It may be taken out inside and bent and formed as axisymmetric, and may be adhered and fixed.

As shown in FIGS. 2, 3, 4, 5, 6, and 7, individually, the side wall corresponding portion 2 and the side wall flap corresponding portion 4 are continuously integrated in the deformed fan-shaped portion c on the blank a. That is, the flange equivalent 1 and the flange flap equivalent portion 5 are provided continuously and integrally.

In the vicinity of the main point of the deformed fan-shaped portion c, the radial ruled lines 13 and 14 have a common base point as shown in FIGS. 2 and 3, respectively, or as shown in FIGS. That is, they are provided so as to have different base points.

The radial ruled lines 13 and 14 of the deformed sector c are provided as a total of five as shown in FIGS. 2, 3, 4, and 5, or as a total of four as shown in FIGS. That is.

The radial ruled lines 13 and 14 of the deformed fan-shaped portion c are either bent at the time of extension to the outside as shown in FIGS. 2, 4 and 5, or only the radial ruled lines 14 are shown in FIGS. As shown in the figure, it is provided to be bent at the time of extension to the outside.

The two radial ruled lines 14 of the deformed fan-shaped portion c
The ruled line 8 is shown in FIG.
Provided as shown in FIGS.
7, it is not provided separately.

In the deformed sector c and its vicinity,
The crease lines 13 and 15 are used as valley fold axes, and the crease lines 14 and 16 are used as ridge fold axes, and the processing is continued as shown in (d) of FIGS. 2, 3, 4, 5, 6, and 7. It is.

The deformed fan-shaped portion c is bent as described above, and as shown in FIGS. 2, 3, 4, 5, 6, and 7 (b) and (c), the flange of the formed container a is formed. At both corners, the ends of the flange 1 are opposed and closely attached to each other at the joint 7 without any step in the same plane in both directions, and the flange flap 5
That is, it is bonded and fixed without any steps in the same plane.

More specifically, as shown in FIG. 17, in the same figure (a) as the front side plane of the deformed fan-shaped part c of the blank a, both the oblique lines of the flange flaps 5-1 and 5-2 or a part thereof are shown. In FIG. 6B, which is a flat surface on the back side of the deformed fan-shaped portion c, the flange 1-
2 or folded flange 1'-1 and flange flap 5
-3 are to be bonded and fixed to each other.

2 and 3 show a container a and a cover sheet b obtained by bending and bonding and fixing a blank a, and the container a after filling the contents is shown in FIG. The flange 1 and the cover sheet b are bonded and fixed by means such as heat sealing, and are provided in a completely sealed state.

2 to 7 show the corner flange 1 of the container a.
The outer peripheral plane is shown as a large chamfered shape, but in addition to this, although not shown, it has a horn shape, a small chamfered shape, a small arc shape, a large arc shape, a tongue shape taken out to the outside, and the like. Even if provided, it is effective for the present invention.

2 to 7, the bottom plane and the opening plane (circular plane of the inner side of the flange) of the container a are shown as rectangles or chamfered rectangles. Although not shown, both the bottom plane shape and the opening plane shape are polygonal, elliptical, and circular, and each side of the rectangular and polygonal shapes may be curved, and each of the above shapes may be curved. The side edges may have a small chamfered shape, a small curved shape, and the two flat shapes of the bottom surface and the opening are not the same shape as the above respective shapes but are appropriately combined with each other in different shapes. Any of them may be effective in the present invention. In FIG. 6A, a ruled line 16 'is provided at the end of the ruled line 16 so that each corner of the plane shape of the opening is formed as a small curve.

In FIGS. 2 to 5, a boundary rule 15 between the bottom surface and the side wall is provided, so that the cross-sectional shape of the boundary between the bottom surface and the side wall of the container a has a bent shape, and the boundary rule line 15 is not provided in FIG. 7 has a small curved line, and FIG.
14 'indicates a two-step corner-folded shape, and any of them is effective for the present invention.

In FIGS. 2 and 3, the cross section of the boundary between the bottom surface and the side wall flap is formed into a bent shape, and in FIGS. 4 to 7, the cross section is provided in a small curved shape or a curved shape. It is effective for Although the present containers shown in FIGS. 2 to 7 are all shown as trays having a wide opening and a shallow bottom, a cup-shaped container not shown but having a narrow opening and a deep bottom is also provided. This is effective for the present invention.

FIGS. 2 to 7 show various containers a as the flanges 1 made of a single leaf sheet.
2 shows a partial cross section of a container a in which the flange 1 is reinforced by the folded flange 1 '. FIG. 8 shows a multi-layer flat flange provided with a folded flange 1 ′ having an angle of 180 ° bonded and fixed to the flange 1.
FIG. 9 shows a triangular cylindrical flange provided with a folded flange 1 ′ of less than 180 ° adhered and fixed to the side wall 2, and the folded flange 1 ′ of less than 180 ° is folded under the flange flap 5. The single sheet folding type flange provided in FIG. 10 is shown in FIG. The dotted lines in FIGS. 8, 9 and 10 indicate the positions of the folded flanges 1 '.

Although not shown, the present invention also includes a container a provided with a single-leaf flange 1 formed as a curved cross section in the width direction or a folded multi-layer flange in the entire extension including the corners of the flange 1. It is valid.

FIGS. 11 and 12 show an embodiment in which a predetermined sheet is adhered and fixed to the entire inside of a container a obtained by bending and bonding and fixing a blank a. As shown in FIG. 11 (a), a single-leaf sheet d indicated by a dotted line is provided so as to be laminated on the entire inner side of the container a as the multi-layered flat flange 1, and a cross section S1-- of FIGS. 11 (b) and (c) is provided. As shown in S1 'and S2-S2, a single sheet d is provided on the upper surface of the multilayer flat flange 1.

As shown in FIG. 12A, a single-leaf sheet d indicated by a dotted line is provided so as to be laminated on the entire inside of the container a as the single-layer flange 1, and a cross section S1-- of FIGS. Single-layer flange 1 as shown in S1, S2-S2
Is provided with a single leaf sheet d via a square frame-like sheet e.

Since the container a is integrated with the lid sheet b and is required to have water-tightness, air-tightness, water resistance, light-shielding properties, and the like, and in addition, it is often required to be able to perform sealing with heat rays and electromagnetic waves and ultrasonic waves. , As the sheet material of the blank a, plain paper or waterproof, water-resistant paper, or poly-laminate,
Various sheets based on paper such as polycoated double-coated paper or the same cellophane paper or metal-deposited paper are preferred.Synthetic paper made of plastic sheet, poly-coated metal sheet, metal-deposited plastic sheet, etc. If the sheet has a predetermined out-of-plane bending stiffness and can be processed with a ruled line, such as a sheet of plastic with a notch of a specified depth or a ruled line formed by applying a linear constriction by heating and pressing, the material and its Any configuration can be adopted without any consideration. Each of the above specifications,
Any suitable combination of sheets of material or multiple layers is effective in the present invention.

The method of bonding and fixing each part after bending the blank a, the method of bonding and fixing to the cover sheet, and the method of bonding and fixing to the laminate sheet are as follows. There is a heat sealing method that is completed by cooling after local heating and pressurization, and the sheet with the plastic hot melt liquid dropped and the other sheet is overlaid and pressurized and then cooled or completed beforehand. There is a hot-melt method in which the melted liquid is dropped and cured and the other sheet is laminated, heated and pressurized, and then cooled and completed.Other methods such as a method using a room temperature curable or room temperature adhesive are used. There is also a method in which the above methods are combined in an appropriate manner, and any method is effective for the present invention.

Since the three-dimensional structure, which is a feature of the present invention, is based on the principle of geometrical principle, the container a with the flange formed by adopting the structure is limited by its shape, material, and processing method. Various deformations and unfolding are possible, for example, the bottom surface, the plane shape of the opening, the dimensional ratio of each tongue and each part shape, the width size and shape of the flange, the adhesive fixing method, the material of the blank a and its configuration, etc. Regardless, all of the containers are effective for the present invention.

In the blank a of the container according to the present invention, since the deformed fan-shaped portion c is provided so that the side wall flap corresponding portion 4 and the flange flap corresponding portion 5 are provided continuously and integrally, both flap corresponding portions are cut and provided. It has become possible to completely eliminate the communication hole of the bent portion 6, which has been forced to be generated by the blank.

The deformed fan-shaped portion c is bent axially symmetrically by being taken out of the container to obtain the container a. As a result, firstly, each of the flanges 1 in the two directions at the corners of the container is flanged. By being joined and adhered and fixed in the same plane so as to be backed by the flap 5, the degree of adhesion of the joint 7 is increased, and a communication hole is generated when the flange 1 and the lid sheet b are heat-sealed. It is possible to eliminate the step due to the overlapping of the flanges 1 of the conventional container which are easy to overlap with each other.

Second, since the fan-shaped portion c is formed to be axially symmetrical, the deformation distortion, which tends to accumulate at a specific location due to the asymmetrical bending formation as in the conventional example, is dispersed, and the material of the sheet deteriorates. Thus, the occurrence of damage could be suppressed beforehand.

Third, since the fan-shaped portion c is bent and fixed in an axially symmetric manner and is stably formed as a unique three-dimensional structure c independent of the flange 1 and the side wall 2, the size of the conventional container is large. The vertical rigidity of the corner has been greatly improved.

Fourthly, since the radial ruled line in the fan-shaped portion c is broken in the middle, it is easy to increase the tightness between the flange flap 5 and the flange 1 at the time of forming the bend. -In addition, it has become possible to sufficiently expand the fixing area of the flange 1 and the flange flap 5.

Fifth, after the fan-shaped portion c is bent, the flange flaps 5 themselves are bonded and fixed to each other, and the flange 1 and the flange flap 5 are bonded and fixed. The in-plane and out-plane bidirectional rigidity was greatly improved.

Sixth, each of the flanges 1 reinforced by the folded flanges 1 'has high out-of-plane rigidity over its entire length and is integrally fixed to the flange flap 5 at each end thereof, so that the height is further increased in and out of the plane. Stiffness was obtained.

Seventh, since the single-leaf sheet is laminated on the entire inner surface of the container a which has been bent and adhered and fixed, pinholes which are easily generated in the container a itself are eliminated.

Eighth, the above-described laminating process is performed by providing a substantially flange-shaped frame-shaped sheet on the flange 1 of the container a which has been bent and bonded and fixed.
The communication hole, which is likely to be formed in the joint 7 at one corner of the flange, is eliminated by blocking.

<Invention of Manufacturing Method and its Embodiment> As a preferred method of manufacturing a container according to the present invention, as shown in FIG. 13, each of blanks a is preliminarily formed before the blank a is bent in a box making machine. FIG. 13 shows that the deformed fan-shaped portion c and its vicinity are mainly bent.
The ruled lines 13, 14, 15, and 16 marked with ◎ in the partial plan view of the blank a shown in (a) are slightly shallower in the partial plan view of the blank a being folded as shown in FIG. The valley-shaped or mountain-shaped blank a provided in advance is fed into a forming die by a paper feeder, is formed to be bent deeper, and is adhesively fixed to the container a.
It is to get.

By performing the folding process in advance as described above, it is possible to prevent a disorder in the starting order of the bending at each ruled line in the forming die in the box making machine and the occurrence of the bending outside the ruled line. The bending of the fan-shaped portion c and the vicinity thereof is reliably and promptly performed.

As shown in FIG. 14, as a preferred method of manufacturing the container a, in the deformed fan-shaped portion c which is in the process of being bent in the box making machine, the two bent portions 14 (the flanges 1) facing each other.
And the flange flap 5) are guided in the approaching direction of the gear f while being gripped by a pair of blade-shaped gears f that can move in the axial direction from the outside of both sides, and finally the joint 7 is formed. It is formed and installed at a predetermined position.
In addition, the installed two bent parts are to be bonded and fixed together with the flange flap 5 immediately after the gear f has moved apart in the axial direction.

The positioning accuracy of the corners of the container a at the upper joint 7 on the flange 1 determines the sealing performance of the container a provided with the cover sheet b, while the positioning accuracy is high in the high-speed box making machine. There are many difficulties in reliably forming and fixing the bent portion 14. By adopting the manufacturing method using the blade-shaped gear f, it is possible to accurately and stably form and fix the two bent portions 14 at the joint portion 7, so that the productivity of the container a in the box making machine is greatly improved. did.

It is to be noted that the blade type gear, which is the above-mentioned operator, is heated in advance so that the two bent portions 14 are bonded and fixed to each other by means such as heat sealing at the stage of positioning on the joint 7. As a result, the watertightness and airtightness of the container a were dramatically improved.

The double-edge gear is not necessarily limited to the one shown in FIG. 14C as long as it has a sharp tip, and there are various modifications, all of which are advantageous to the present invention.

Although not shown, after the blank a, which is bent and not bonded and fixed, is filled with the contents, the flange 1 and the cover sheet b are heat-sealed by heating and pressing, and at the same time, the flange flap 5 itself is removed. The method for manufacturing the present container a in which the flange 1 and the flange flap 5 are heat-sealed to each other and to each other, is effective for the present invention. By eliminating the process of heat sealing by heat and pressure, which should be performed in the box making machine, the mechanism of the box making machine has been simplified and the box making speed has been greatly improved.

Folded flange 1 'shown in FIGS.
As a method of manufacturing a container a with a container a, a case where the container a is manufactured as a series of bending forming for folding back the flange 1 ′ and bending forming of the deformed fan-shaped portion c in a box making machine, In the stage before the processing by the method described above, the bending and bonding and fixing for the return of the flange 1 'are preceded, and then the bending and forming of the deformed fan-shaped portion c in the box making machine.
There are cases where the container a is manufactured by bonding and fixing, and any of them is effective for the present invention.

As shown in FIG. 21, after the blank a is bent and bonded and fixed in a box making machine, a heat-resistant ring-shaped sheet e such as a piece of paper is provided on the upper surface of the flange 1 and heat is applied. There is a method of manufacturing the container a in which the softened laminating sheet d is provided by laminating the entire upper surface of the container a including the flange 1 by vacuum pressure or the like, and the blank a is manufactured as shown in FIG. After being bent and bonded and fixed in a box machine, a ring-shaped sheet e such as a single sheet of paper or a laminating sheet d provided with a ring-shaped partial coating e of a thermosetting or ultraviolet-curing resin in advance is thermally softened. In addition, there is a method of manufacturing the present container a which is provided by being laminated under vacuum pressure, and any method is effective for the present invention.

The degree of completion of the container a obtained from the blank a depends largely on the result of the formation of the fold at each ruled line centered on the deformed fan-shaped portion c. It largely depends on the result of the adhesive fixation at each part of the already-formed deformed fan-shaped part c, and also on the result of blocking / crushing of each communication hole which tends to occur around the part. So far, the concrete means in which the front and rear bends are formed accurately and completely at each ruled line has been exemplified, and subsequently the latter concretely exerts the effects of the adhesive fixation and the blocking / crushing of the communication hole. The means will be exemplified.

As shown in FIGS. 16 (a) and 16 (b), in the blank a which has been bent in the box making machine and which has been subjected to polycoating, the flange flap 5 and the end of the flange 1 are heated.
By being pressurized, the flange 5-1 and the flange flap 5-2 in FIG. 7A, which are the front plane of the blank a, are heat-sealed to each other, and the same figure (b), which is the back plane of the blank a, 3), the flange 1-2 or 1'-1 and the flange flap 5-3 are heat-sealed with each other, and are accurately and completely adhered and fixed.

In the box making machine, more preferably, as shown in FIG. 17, in the blank a which has been subjected to the polycoating process in the course of bending, the hot melt is formed near the center of the flange flap 5 and near the ruled line 13 of the flap 5. After the liquid is dropped, the above-described adhesive fixing is performed.

Preferably, as shown in FIG. 18, the joint 7 of the flange 1 of the container a which is heat-sealed after being bent is formed.
This means that the hot melt liquid is dropped in the vicinity.

Preferably, as shown in FIG. 19, embossing is performed in the vicinity of the joint 7 of the flange 1 of the heat-sealed container a after bending.

Preferably, as shown in FIG. 20, both sides 11 and the center 12 of the flange flap 5 of the container a that has been bent and heat sealed are embossed.

FIGS. 15 (a) and 15 (b) show the specific functions and effects brought about by the means for blocking and crushing the communication holes shown in FIGS.
(B) The g, h, and i communication holes that are likely to occur in the section s-5 near the three-dimensional structure c at the corner of the container a shown in (c) are specified.

The communication hole g is provided with the means shown in FIGS. 18 and 19, the communication hole h is provided with the means shown in FIG. 20, and the communication hole i is provided with the means shown in FIGS.
Twenty measures are effective.

The means shown in FIGS. 21 and 22 correspond to the communication holes g,
This is effective for all of h and i.

The method of manufacturing the container a by each means shown in FIGS. 17 to 20 has many modifications.
In a blank a in which a hot-melt droplet cooled and hardened was previously provided at the center of the flange flap 5 which was bent and formed halfway in the box making machine but was not adhered and fixed, the content was filled and then heated and pressed. The flange 1 and the lid sheet b are heat-sealed to each other, and the flange flap 5 itself is heat-sealed to each other, and the vicinity of the joint 7 is bonded and fixed by the hot melt liquid. In the container a heat-sealed with the b, the flange 1 and the flap 5 are embossed together with the lid sheet b in the vicinity of the joint 7 and on both sides 11 and the center 12 of the flange flap 5, Either manufacturing method is effective for the present invention.

In addition to this, a method of manufacturing the present container by appropriately combining the above-mentioned respective means can be easily conceived, and all are effective for the present invention.

[0063]

As described above, the following verification results were obtained for the hermetically sealed performance, the structural performance and the product cost of the flanged container of the present invention as compared with the conventional container.

1. Folded part 6 and joint part 7 that were forced by the shape of the blank compared to similar conventional containers
In the container of the present invention, it is easy to remove or seal with the blank provided with the deformed fan-shaped part, so that the container of the present invention has a lid sheet together with the water and airtightness of its main body. The sealing performance with the seal has been greatly improved.

2. Radial ruled lines in the deformed fan-shaped part are bent at the waist and arranged axially symmetrically, thereby suppressing the occurrence of damage at the time of forming the container, reducing the residual stress after the formation, and shortening the fixing time after bonding. I was able to do it.

3. The transverse ruled line 8 in the deformed fan-shaped portion enlarges the bonding area between the flange flaps 5 itself at the time of bonding and fixing after bending, thereby improving the water / airtightness of the three-dimensional structure c of the container and its structural stability. done.

4. The function of the three-dimensional structure c in which the deformed fan-shaped part c is bent and adhered and fixed is provided to increase the vertical rigidity of the corner of the container and the out-of-plane rigidity of the flange 1 so that the rigidity is equal to that of the conventional container. Gauge down for blank a paper is now possible.

5. By arranging all the ruled lines in the deformed fan-shaped portion c as a single sheet and symmetrically, bending and bonding and fixing of this blank by a box making machine can be completed in a single process, so the productivity of the container is large. Improved.

6. As a comprehensive result, compared to conventional similar containers, this container achieves higher water and airtightness, and its product cost is almost 3
It became possible to reduce 0-40%.

[Brief description of the drawings]

1 shows a conventional container, (a) is a blank plan view,
(B) is an overall perspective view, (c) is a partial perspective view from the back side,
(D) is a partial perspective view in the process of forming a bend.

2A and 2B show a container of the present invention, wherein FIG. 2A is a blank plan view, FIG. 2B is an overall perspective view, FIG. 2C is a partial cross-sectional perspective view from the back side, and FIG. It is a sectional perspective view.

3A and 3B show a container of the present invention, wherein FIG. 3A is a blank plan view, FIG. 3B is an overall perspective view, FIG. 3C is a partial cross-sectional perspective view from the back side, and FIG. It is a sectional perspective view.

FIG. 4 shows various deformations of the three-dimensional structure of the container of the present invention;
(A) is a blank partial plan view, (b) is a partial perspective sectional view from the back side, (c) is a partial perspective sectional view from the front side,
(D) is a partial perspective sectional view in the course of formation.

FIG. 5 shows various deformations of the three-dimensional structure of the container of the present invention;
(A) is a blank partial plan view, (b) is a partial perspective sectional view from the back side, (c) is a partial perspective sectional view from the front side,
(D) is a partial perspective sectional view in the course of formation.

FIG. 6 shows various deformations of the three-dimensional structure of the container of the present invention;
(A) is a blank partial plan view, (b) is a partial perspective sectional view from the back side, (c) is a partial perspective sectional view from the front side,
(D) is a partial perspective sectional view in the course of formation.

FIG. 7 shows various deformations of the three-dimensional structure of the container of the present invention;
(A) is a blank partial plan view, (b) is a partial perspective sectional view from the back side, (c) is a partial perspective sectional view from the front side,
(D) is a partial perspective sectional view in the course of formation.

8A and 8B show various deformations of the folded flange of the container of the present invention. FIG. 8A is a partial perspective sectional view from the front side, FIG. 8B is a partial perspective sectional view from the back side, and the dotted line in the figure is invisible. It is a part or the whole of the folded flange.

9A and 9B show various deformations of the folded flange of the container of the present invention, wherein FIG. 9A is a partial perspective cross-sectional view from the front side, and FIG. 9B is a partial perspective cross-sectional view from the back side; It is a part or the whole of the folded flange.

10A and 10B show various deformations of the folded flange of the container of the present invention, wherein FIG. 10A is a partial perspective cross-sectional view from the front side, and FIG. 10B is a partial perspective cross-sectional view from the back side; It is a part or the whole of the folded flange.

FIG. 11 shows a container of the present invention provided after being subjected to a polylaminating process, and (a) is an overall sectional view of the container;
(B) is an enlarged partial view of section S1-S1, and (c) is section S.
It is an enlarged partial view of 2-S2.

FIG. 12 shows a container of the present invention provided after being subjected to a polylaminating process, wherein (a) is an overall sectional view of the container,
(B) is an enlarged partial view of section S1-S1, and (c) is section S.
It is an enlarged partial view of 2-S2.

FIGS. 13A and 13B show a blank of the present invention on which a folding ruled line is provided, wherein FIG. 13A is a partial plan view before folding processing, and FIG. 13B is a partial plan view after folding processing.

14A and 14B show a blank of the present invention that is bent by a pair of blade gears, wherein FIG. 14A is a partial perspective view in the process of forming a bend, FIG. () Is a perspective view of the blade-type gear.

15A and 15B show portions of the container of the present invention where various communication holes are likely to occur, (a) is a partial perspective view, (b) is an enlarged view of a cross section S3-S3 without a folded flange, and (c) is an enlarged view of the folded flange. It is an enlarged view of a certain section S3-S3.

16A and 16B show a blank of the present invention to be bonded and fixed, wherein FIG. 16A is a partial plan view from the front side, FIG. 16B is a partial plan view from the back side, and a dotted line in the figure indicates a folded flange. Is the case.

FIG. 17 is a partial perspective view of the blank being bent under hot melt droplets, showing the blank or container of the present invention in which the occurrence of communication holes is suppressed.

FIG. 18 is a partial perspective view showing the blank or the container of the present invention in which the occurrence of the communication hole is suppressed, and the container after the completion of the folding under hot melt droplets.

FIG. 19 is a partial perspective view showing the blank or the container of the present invention in which the occurrence of a communication hole is suppressed, and the container after bending is completed by embossing.

FIG. 20 is a partial perspective view of the container after the completion of folding by embossing, showing the blank or container of the present invention in which the generation of communication holes is suppressed.

FIG. 21 is a perspective view showing the configuration of the container of the present invention provided with a laminate sheet and a ring-shaped sheet.

FIGS. 22A and 22B show the container of the present invention in the process of providing a laminate sheet coated with a ring, wherein FIG. 22A is an overall perspective view, and FIG.

[Explanation of symbols]

 Reference Signs List 1 Flange equivalent portion or flange 1-1 Flange surface 1-2 Flange back surface 1 'Folded flange 1'-1 Same as above flange surface 2 Side wall equivalent portion or side wall 3 Bottom equivalent portion or bottom surface 4 Side wall flap equivalent portion or side wall Flap 5 Flange flap equivalent portion or flange flap 5-1 Both sides of front surface of same flap 5-2 Center of front surface of same flap 5-3 Back both sides of same flap 5-4 Center of back surface of same flap 6 Flange flap Boundary portion between the flap and the side wall flap 7 Flange joint 8 Connecting crease line 9 Flange flap central portion 11 Both ends on the back side of the flange flap 12 Flange flap back side center portion 13 Radial valley fold line 14 Radial valley fold line 14 ' Ruled line 15 Boundary fold line between bottom and side wall 16 Ruled side wall and flange Folded crease line 16 ′ Auxiliary crease crease line of crease line 16 a Flanged container or blank for flanged container b Cover sheet c Deformed fan-shaped part d Laminate sheet e Frame-shaped sheet or ring-shaped coating f Bladed gear g Communication hole h Communication hole i Communication hole k Roll of laminating sheet l Mold for laminating m Vacuum hole

Claims (12)

[Claims] 1. A bottom surface equivalent portion 3, a side wall equivalent portion 2 adjacent to each side thereof, and a flange equivalent portion 1 adjacent outside thereof are provided, and a side wall flap equivalent portion outside a corner portion of each side. A flanged container a obtained by bending a blank a provided with a deformed fan-shaped portion c that is continuously integrated without separating the flange 4 and the flange flap equivalent portion 5 from each other. 2. In the deformed fan-shaped portion c and its vicinity, a plurality of ruled lines are provided radially outward with a base portion or a periphery thereof as a base point, and a part or all of the radial ruled lines are formed outward. The flanged container (a) according to claim 1, wherein the blank (a) is provided so as to be bent in the middle of extension. 3. The deformed fan-shaped part c is taken out of or inside the container and is bent and formed with a center line of the fan-shaped part c passing through the center thereof as a symmetry axis. The container a with a flange according to claim 2. 4. After the deformed fan-shaped portion c and its peripheral portion are bent along each ruled line, the flange flaps 5 themselves are adhered and fixed to each other and the flange 1 is formed.
The flanged container (a) according to claim 1, 2 or 3, wherein a three-dimensional structure (c) obtained by integrally bonding and fixing to the flange flap (5) so that the end is flanked is provided. 5. A single sheet is laminated and provided on the surface of the flange 1, which is bent and bonded and fixed, and on the side wall portion 2 and the bottom portion 3.
A container a with a flange according to claim 2 or claim 3 or claim 4. 6. A blank a, which is finally bent and bonded and fixed, is provided with a part or all of a ruled line provided in the deformed fan-shaped portion c and its peripheral portion in a previous stage, in which the blank a is folded in advance. The container a with a flange according to claim 1, 2, 3, 4, or 5.
Manufacturing method. 7. The blank a that is bent and not bonded and fixed is obtained by being bonded and fixed at the time of heat sealing with the lid sheet b after filling the contents. Or the manufacturing method of the container a with a flange of 4 or 5 or 6. 8. A blank a in a bending process guides opposed bending portions 14 in respective deformed fan-shaped portions c in an approaching direction while being gripped by a pair of blade-shaped gears f from both inner sides thereof. And finally fixed and provided at the position of the joint portion (7).
Or the manufacturing method of the container a with a flange of 5 or 6 or 7. 9. After the blank a is bent and formed in the box making forest, the flange flap 5 is heated and pressed to heat seal the flap 5-1 and the flap 5-2 with each other. The flange 1 and the flap 5 are heated and pressurized so that the flange 1-2 or 1'-
The method for producing a container a with a flange according to claim 1, wherein the first and the flaps 5-3 are heat-sealed with each other. 10. A flap 5 in which a small amount of hot melt liquid has been dropped near the center portion 9 of the flange flap 5-2 after the blank a is bent in the box-making forest, is heat-sealed by heating and pressing. 9. The method according to claim 1, wherein the first and second parts are provided in a manner to be provided.
Or the method for producing a container a with a flange according to 8 or 9. 11. A hot melt liquid is dropped on a joint 7 of a flange 1 heat-sealed by heating and pressurizing, and a blank a is bent in the box-making forest. Or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10; 12. A blank a is formed in a box-making forest, and is formed by embossing the flange joint 7 or the central portion 12 or both side portions 11 of the flange flap 5 after being bent. Item 1 or 2 or 3 or 4
Or the manufacturing method of 5 or 6 or 7 or 8 or 9 or 10 or 11 of the container a with a flange.