JP7175811B2 - paper container with flange - Google Patents

Description

TECHNICAL FIELD The present invention relates to a flanged paper container that is filled with powdery or liquid food or the like and then sealed by thermal bonding with a lid.

Conventionally, as a flanged paper container that is filled with powdery or liquid food or the like and then thermally bonded and sealed with a lid body, side plates are attached to two opposite sides of a rectangular bottom plate 100 with valley fold lines, respectively. 101 are continuously provided, and edge pieces 102 serving as flange portions are continuously provided on the outer periphery of the side plate 101 via mountain fold lines, and laterally extending tongue pieces 103 are provided at the left and right ends of the edge pieces 102, respectively, Inverted triangular folded joint plates 104 are connected to the left and right ends of the side plate 101 via valley fold lines, respectively, and joint edge pieces 105 are connected to the outer periphery of the folded joint plates 104 via mountain fold lines. , the second side plate 106 is connected to the two opposite sides of the bottom plate 100 via the valley fold lines, respectively, and the second edge piece serving as the flange portion is formed on the outer periphery of the second side plate 106 via the mountain fold line. 107 are continuously provided, and the left and right ends of the second edge piece 107 are provided with second tongue pieces 108 extending in the horizontal direction, respectively. The second folded joint plate 109 is continuously provided, and the edge of the folded joint plate 104 that is not connected to the side plate 101 and the side of the second folded joint plate 109 that is not connected to the second side plate 106 The edges are connected via a valley fold line, and when the side plates 101 and 106 are folded and assembled into a tray shape, the edge piece 102, the second edge piece 107, and the joint edge piece 105 are the same. A second fold is applied to the edge of the second tongue 108 at each corner near where the second tongue 108 and the second fold joint plate 109 meet. There is a flanged paper container formed from a tray container blank (see FIG. 10) provided with a small projection 110 protruding toward the joint plate 109 (see, for example, Patent Document 1).

JP-A-2000-255546

In the paper container with a flange formed of a tray container blank described in Patent Document 1, folding joint plates 104 connected to the left and right ends of the side plate 101 are valley-folded and connected to the second side plate 106. The second folded joining plate 109 is mountain-folded and overlapped, and the edge piece 102 connected to the outer periphery of the side plate 101 and the second edge piece 107 connected to the outer periphery of the second side plate 106 are mountain-folded. The flange portion is formed by folding, overlapping the tongue 103 of the edge piece 102 and the second tongue piece 108 of the second edge piece 107, and adhering the edge piece 102 and the second edge piece 107 together. A step is generated on the surface of the flange portion where the tongue 103 and the tongue 108 are overlapped.
When a lid made of film or paper is affixed to such a flanged paper container for sealing, if the lamination is loose, there is a concern that a gap may occur at the stepped portion of the flange, which may result in leakage of the contents. There is a problem that it may lead to deterioration.

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper container with a flange that allows a cover made of film or paper to be reliably attached to the flange without gaps.

In order to achieve the above object, the invention according to claim 1 consists of a paper substrate with a thermoplastic resin layer laminated at least on the inner surface of the container, and has two rectangular bottom plates facing each other. A first side plate is provided on each side through a first fold line, and a second side plate is provided on each of the other two opposite sides of the bottom plate through a second fold line. A first flange plate is provided on the outer edge via a third fold line, and a second flange plate is provided on the outer edge of the second side plate via a fourth fold line. Between the side edges of the two side plates, a first fold of an inverted triangle is connected to both side edges via a fifth fold line and a sixth fold line, respectively, and is foldably connected to each other via a seventh fold line at the center. A joining plate and a second folding joining plate are provided, flange joining pieces are provided on the outer edge of the first folding joining plate via an eighth folding line, and first projecting pieces are provided on both end sides of the first flange plate. A blank having second projecting pieces provided on both end sides of the second flange plate is valley-folded along the first folding line and the second folding line to raise the first side plate and the second side plate, and The 7-fold line is valley-folded, the first folding joint plate and the second folding-joint plate are overlapped, the overlapped portions are glued, the fifth fold line is valley-folded, the sixth fold line is mountain-folded, and the While laying down the 2 side plates to the outer surface side, the inner surfaces of the flange joint piece and the first projecting piece are superimposed on the outer surface of the second flange plate including the second projecting piece, and the overlapped portion is adhered, A flanged paper container assembled by folding the third folding line and the fourth folding line in the mountain direction and laying down the first flange plate and the second flange plate in the horizontal direction, wherein the outer edge of the first flange plate is a ninth folding line. A first folded plate is provided to be superimposed on the inner surface side of the first flange plate via the first folded plate, and the first flange plate and the second flange plate are laid down in the horizontal direction on both end sides of the first folded plate In some cases, joint edge portions having edges of a shape that can be joined to the edges of the second projecting pieces provided on both end sides of the second flange plate are provided.

According to the invention of claim 1, the first folded plate is provided on the outer edge of the first flange plate via the ninth folding line and is superimposed on the inner surface side of the first flange plate, Both end sides of the folded plate can be joined to the edges of the second protruding pieces provided on both end sides of the second flange plate when the first flange plate and the second flange plate are laid down in the horizontal direction. Since the joint edge portion having the edge of a shape is provided, when the first flange plate and the second flange plate are laid down in the horizontal direction, the joint edge portion provided on both end sides of the second flange plate The second projecting piece overlaps the inner surface side of the first flange plate, that is, the upper surface of the first flange plate, and the edge of the second projecting piece provided on both end sides of the second flange plate and the first flange plate Although there is a step between the upper surface and the upper surface of the first folded plate, by folding the first folded plate from the ninth fold line and overlapping it on the first flange plate, the joint ends provided on both end sides of the first folded plate The edge of the edge portion is joined to the edge of the second projecting piece provided on both end sides of the second flange plate, and the second flange plate and the first folded plate overlapped on the first flange plate. It is possible to form a flange portion having a smooth upper surface without a step between them.
As a result, the cover made of film or paper can be securely adhered to the flange without gaps.

According to a second aspect of the invention, there is provided the second flange plate according to claim 1, wherein the end edges of the second projecting pieces provided on both end sides of the second flange plate and the inner surface side of the first flange plate are superimposed on the inner surface side of the first flange plate. Edges of the joint edges provided on both end sides of the first folded plate are curved.

According to the invention of claim 2, the edges of the second projecting pieces provided on both end sides of the second flange plate and the first folded plate overlapped on the inner surface side of the first flange plate Since the edges of the joint edges provided on both end sides are formed in a curved shape, the edges of the second projecting piece provided on the second flange plate and the edges provided on the first folded plate The edge of the joint edge portion thus formed becomes longer, and the amount of glue accumulated between the edge of the second projecting piece and the edge of the joint edge portion increases accordingly, and the edge of the second projecting piece increases. and the edge of the joint edge portion, a flange portion having a smoother upper surface can be formed.

The invention according to claim 3 is the second flange plate according to claim 1, which is superimposed on the edge of the second projecting piece provided on both end sides of the second flange plate and the inner surface side of the first flange plate. The edges of the joint edge portions provided on both end sides of the first folded plate are formed into hook shapes that engage with each other.

According to the third aspect of the invention, both ends of the first folded plate overlapped on the inner surface side of the first flange plate and the edges of the second projecting pieces provided on both end sides of the second flange plate. Since the edges of the joint edges provided on the sides are formed in the shape of hooks that engage with each other, the edges of the joint edges provided on both end sides of the joined first folded plate It is possible to prevent misalignment between the edges and the edges of the second projecting pieces provided on both end sides of the second flange plate, and to obtain a reliable joining state.

According to the invention of claim 4, the outer edge of the second flange plate according to any one of claims 1 to 3 is superimposed on the outer surface side of the second flange plate via a tenth folding line. A second folding plate is provided.

According to the fourth aspect of the invention, since the second folded plate is provided on the outer edge of the second flange plate via the tenth fold line and is superimposed on the outer surface side of the second flange plate, The second folded plate is mountain-folded from the tenth folding line to the outer edge of the second flange plate, and is superposed on the outer surface side, that is, the lower surface of the second flange plate and adhered to the first flange plate. The structure is the same as the structure in which the first folding plate is superimposed on the inner surface side, and the bonding balance of the cover body formed of film or paper on the flange portion is improved, and the paper is further superior in terms of strength. You can get a container.

According to the paper container with a flange according to the present invention, the cover made of film or paper can be reliably attached to the flange without gaps.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a development explanatory view showing a first example of an embodiment of a flanged paper container according to the present invention with a blank; FIG. 2 is a perspective view showing a flanged paper container in the process of being assembled with the blank shown in FIG. 1; Fig. 2 is a perspective view showing a flanged paper container assembled from the blank shown in Fig. 1; FIG. 4 is a partially enlarged explanatory view of the inside of the flanged paper container shown in FIG. 3 as seen obliquely from above; 4 is a partially enlarged explanatory view of the outer side of the flanged paper container shown in FIG. 3 as seen obliquely from below; FIG. FIG. 4 is a partially enlarged explanatory view of a blank for assembling the second embodiment of the flanged paper container according to the present invention. 7 is a partially enlarged plan view of the flanged paper container assembled from the blanks shown in FIG. 6. FIG. FIG. 11 is a partially enlarged explanatory view of a blank for assembling the third embodiment of the flanged paper container according to the present invention; 9 is a partially enlarged plan view of the flanged paper container assembled from the blanks shown in FIG. 8. FIG. It is an expansion|deployment explanatory drawing which shows the conventional paper container with a flange with a blank.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a flanged paper container according to the present invention will be described in detail below with reference to the drawings.
1 to 5 show a first example of an embodiment of a flanged paper container according to the present invention. FIG. 3 is a perspective view showing a flanged paper container assembled from the blank shown in FIG. 1, FIG. 4 is a perspective view showing the flanged paper container assembled from the blank shown in FIG. 1, and FIG. 4 is a flanged paper container shown in FIG. FIG. 5 is a partially enlarged explanatory view of the outer side of the flanged paper container shown in FIG. 3 as seen from diagonally below.

The flanged paper container of this example is assembled by the blank shown in FIG.
The blank for assembling the flanged paper container of this example is made of a paper substrate laminated with a thermoplastic resin layer at least on the inner surface of the container.
The laminated thermoplastic resin layer may be one obtained by laminating a thermoplastic resin film, extrusion laminating a thermoplastic resin, or laminating a thermoplastic resin by means of coating or printing. may
A blank made of such a paper base material is provided with first side plates 3 on two opposite sides of a rectangular bottom plate 1 with first folding lines 2 interposed therebetween, and on the other opposite sides of the bottom plate 1. A second side plate 5 is provided on each of two sides with a second folding line 4 interposed therebetween.
A first flange plate 7 is provided on the outer edge of the first side plate 3 via a third folding line 6 , and a second flange plate 9 is provided on the outer edge of the second side plate 5 via a fourth folding line 8 . is provided.

The side edges of the adjacent first side plate 3 and second side plate 5 are connected to both side edges via a fifth folding line 10 and a sixth folding line 11, respectively, and a seventh folding line 12 is provided at the center. A first folding joint plate 13 and a second folding joint plate 14 are provided, which are connected to each other so as to be freely foldable.
Flange joint pieces 16 are provided on the outer edge of the first folded joint plate 13 via the eighth fold line 15, first projecting pieces 17 are provided on both ends of the first flange plate 7, and both ends of the second flange plate 9 A second projecting piece 18 is provided.

Furthermore, a first folded plate 20 is provided on the outer edge of the first flange plate 7 via a ninth fold line 19 and overlapped on the inner surface side of the first flange plate 7, and both ends of the first folded plate 20 are provided with , the edge of a shape that can be joined to the edge 21 of the second projecting piece 18 provided on both end sides of the second flange plate 9 when the first flange plate 7 and the second flange plate 9 are laid down in the horizontal direction. A joining edge 23 having 22 is provided.
In the first example, the edge 21 of the second protruding piece 18 and the edge 22 of the joint edge 23 are linear.

A second folding plate 25 is provided on the outer edge of the second flange plate 9 so as to overlap the outer surface of the second flange plate 9 with a tenth fold line 24 interposed therebetween.

To assemble a paper container with a flange using a blank having such an unfolded structure, first, the first folding line 2 and the second folding line 4 are valley-folded to raise the first side plate 3 and the second side plate 5, and then the second side plate 5 is folded. The 7-fold line 12 is valley-folded, the first folding joining plate 13 and the second folding joining plate 14 are overlapped, and the overlapped portions are adhered.

Next, the fifth folding line 10 is valley-folded, the sixth folding line 11 is mountain-folded, the second folding joint plate 14 is laid down to the outer surface side of the second side plate 5, and the flange joint piece 16 and the first projecting piece The inner surface of 17 is superimposed on the outer surface of the second flange plate 9 including the second projecting piece 18, and the overlapped portion is adhered. Lay down the flange plate 7 and the second flange plate 9 (see FIG. 2).

Next, the first folded plate 20 is valley-folded from the ninth fold line 19 and overlapped with the first flange plate 7, and the edges 22 of the joint edges 23 provided on both end sides of the first folded plate 20 are folded into the second folds. The first folded plate 20 and the first flange plate 7 are bonded together by joining the edges 21 of the second projecting pieces 18 provided on both end sides of the flange plate 9 (see FIG. 3).

Next, the second folding plate 25 is mountain-folded from the tenth folding line 24 and is superposed on the outer surface side of the second flange plate 9 and adhered.

In the flanged paper container of this example assembled in this way, the first folding plate 20 is superimposed on the inner surface side of the first flange plate 7 via the ninth fold line 19 on the outer edge of the first flange plate 7. 2nd protruding pieces provided on both end sides of the second flange plate 9 when the first flange plate 7 and the second flange plate 9 are laid down in the horizontal direction. 18, the joint edge portion 23 having an edge 22 having a shape that can be joined to the edge 21 of No. 18 is provided. The second projecting pieces 18 provided on both end sides of the flange plate 9 overlap the inner surface side of the first flange plate 7, that is, the upper surface of the first flange plate 7, so that the edge 21 of the second projecting piece 18 and the first flange plate Although there is a step between the upper surface of the first folded plate 20 and the upper surface of the first folded plate 20, by folding the first folded plate 20 along the ninth fold line 19 and overlapping it with the first flange plate 7, the joint provided on both end sides of the first folded plate 20 can be formed. The edge 22 of the edge portion 23 is joined to the edge 21 of the second projecting piece 18 provided on both end sides of the second flange plate 9 , and the first flange plate 9 and the first flange plate 7 overlapped with each other. A flange portion having a smooth upper surface can be formed without a step between the folding plate 20 and the folded plate 20 .

In addition, in the first example, the second folding plate 25 is provided on the outer edge of the second flange plate 9 via the tenth fold line 24 so as to be superimposed on the outer surface side of the second flange plate 9 . The folding plate 25 is mountain-folded from the tenth fold line 24 and is superimposed on the outer surface side of the second flange plate 9 and adhered, thereby overlapping the first folding plate 20 on the inner surface side of the first flange plate 7. With the same structure, the lid body formed of film or paper on the flange portion has a good bonding balance, and is even more excellent in terms of strength.

6 and 7 show a second embodiment of the flanged paper container according to the present invention, and FIG. 6 is a partially enlarged explanatory view of a blank for assembling the flanged paper container of the second example. 7 is a partially enlarged plan view of the flanged paper container assembled from the blanks shown in FIG.
The paper container with flanges of the second example has the same basic configuration as the paper container with flanges of the first example, and the same components as those of the first example will be described with the same reference numerals.

The difference between the second example and the first example is that the edges 21 of the second projecting pieces 18 provided on both end sides of the second flange plate 9 and the first folded plate overlapped on the inner surface side of the first flange plate 7 It is in the shape of the edge 22 of the joint edge 23 provided on both end sides of 20 .
In the second example, the edge 21 of the second protruding piece 18 and the edge 22 of the joint edge 23 are curved.

According to the flanged paper container of the second example configured in this way, the edges 21 of the second protruding pieces 18 provided on both end sides of the second flange plate 9 overlap the inner surface side of the first flange plate 7. Since the edges 22 of the joint edges 23 provided on both end sides of the first folded plate 20 to be matched are curved, the edges 21 of the second protruding pieces 18 and the edges of the joint edges 23 are curved. As the edge 22 becomes longer, the amount of glue accumulated between the edge 21 of the second projecting piece 18 and the edge 22 of the joining edge 23 increases, and the edge 21 of the second projecting piece 18 and the joining edge 23 increase. The space between the edge 22 of 23 is filled, and a flange portion having a smoother upper surface can be formed.
Since other configurations and effects are the same as those of the first example, the first example will be used and the description thereof will be omitted.

8 and 9 show a third embodiment of a flanged paper container according to the present invention, and FIG. 8 is a partially enlarged explanatory view of a blank for assembling the flanged paper container of the third example. 9 is a partially enlarged plan view of the flanged paper container assembled from the blanks shown in FIG.
The paper container with flanges of the third example has the same basic configuration as the paper container with flanges of the first example, and the same components as those of the first example are denoted by the same reference numerals.

The difference between the third example and the first example is that the edges 21 of the second projecting pieces 18 provided on both end sides of the second flange plate 9 and the first folded plate overlapped on the inner surface side of the first flange plate 7 It is in the shape of the edge 22 of the joint edge 23 provided on both end sides of 20 .
In the third example, the edge 21 of the second protruding piece 18 and the edge 22 of the joint edge 23 are shaped like hooks that engage with each other.

According to the flanged paper container of the third example configured in this way, the edges 21 of the second projecting pieces 18 provided on both end sides of the second flange plate 9 overlap the inner surface side of the first flange plate 7. Since the edges 22 of the joint edge portions 23 provided on both end sides of the first folded plate 20 to be matched are formed in a hook shape, the edges 22 of the joint edge portion 23 and the edges of the second projecting pieces are aligned. 21 are engaged with each other, the edge 22 of the joining edge portion 23 and the edge 21 of the second protruding piece are prevented from being displaced in joining, and a reliable joining state can be obtained.
Since other configurations and effects are the same as those of the first example, the first example will be used and the description thereof will be omitted.

1 Bottom plate 2 First broken line 3 First side plate 4 Second broken line 5 Second side plate 6 Third broken line 7 First flange plate 8 Fourth broken line 9 Second flange plate 10 Fifth broken line 11 Sixth broken line 12 Seventh Folding line 13 First folded joining plate 14 Second folding joining plate 15 Eighth folding line 16 Flange joining piece 17 First protruding piece 18 Second protruding piece 19 Ninth folding line 20 First folded plates 21, 22 Edge 23 Joint edge 24 10th folding line 25 2nd folding plate

Claims (4)

A rectangular bottom plate made of a paper base material laminated with a thermoplastic resin layer at least on the inner surface side of the container, and a first side plate provided on each of two opposite sides of the rectangular bottom plate via the first fold line, A second side plate is provided on each of the other two opposite sides of the bottom plate via a second fold line, and a first flange plate is provided on the outer edge of the first side plate via a third fold line, A second flange plate is provided on the outer edge of the second side plate via a fourth folding line, and between the side edges of the adjacent first side plate and the second side plate, second flange plates are provided on both side edges, respectively. A first folded joint plate and a second folded joint plate having an inverted triangular shape are provided, which are connected via 5 fold lines and a 6 fold line and are foldably connected to each other through a 7 fold line at the center, wherein the first fold joint plate A flange joint piece is provided on the outer edge of the flange via an eighth fold line, a first projecting piece is provided on both end sides of the first flange plate, and a second projecting piece is provided on both end sides of the second flange plate The blank is valley-folded along the first folding line and the second folding line to raise the first side plate and the second side plate, and the seventh folding line is valley-folded to fold the first folding joint plate and the second folding joint plate. are overlapped, the overlapped parts are glued, the fifth fold line is valley-folded, the sixth fold line is mountain-folded and laid down on the outer surface side of the second side plate, and the flange joint piece and the first The inner surface of the protruding piece is superimposed on the outer surface of the second flange plate including the second protruding piece, the superposed portion is adhered, and the third folding line and the fourth folding line are mountain-folded to form the first flange plate, In a flanged paper container that is assembled by laying down the second flange plate in the horizontal direction,
A first folded plate is provided on the outer edge of the first flange plate to be superimposed on the inner surface side of the first flange plate via a ninth folding line. joint edge portions having edges of a shape that can be joined to the edges of the second protruding pieces provided on both end sides of the second flange plate when the flange plate and the second flange plate are laid down in the horizontal direction; A paper container with a flange, characterized in that it is provided with a flange. Edges of the second protruding pieces provided on both end sides of the second flange plate and the joint edge portions provided on both end sides of the first folded plate superimposed on the inner surface side of the first flange plate 2. The flanged paper container according to claim 1, wherein the edges of the flanged paper container are curved. The edges of the second protruding pieces provided on both end sides of the second flange plate and the joint edge portions provided on both end sides of the first folded plate superimposed on the inner surface side of the first flange plate. 2. The flanged paper container according to claim 1, wherein the edges are formed into mutually engaging hooks. 4. The second folding plate is provided on the outer edge of the second flange plate via a tenth folding line and is superimposed on the outer surface side of the second flange plate. 2. The flanged paper container according to 1.

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