TW202204219A - paper container - Google Patents

Abstract

A paper container is used to easily open the paper container in order to dent the upper end of the body sheet with a small force when the paper container is opened. The gable wall forming sheet (23) is connected through the top horizontal folding line (25) to form a downward curved first auxiliary folding line (43) on the body sheet (7) on the opening side. The first auxiliary folding line is the point of intersection (39) or the point of intersection (39) between the ends of the longitudinal fold lines (3, 4) of the body connecting both sides of the body sheet (7) on the unsealed side and the end of the horizontal fold line (25) at the top The end portions (41, 42) are arranged so as to be adjacent to each other, and the slightly triangular surface portion (36) of the flakes is formed on the gable with the unsealed side or the slightly triangular portion of the gable with the unsealed side is formed. A second auxiliary fold line (58) extending in the vertical direction is formed on the face (36) and the body sheet (7) on the unsealing side.

Description

paper container

The present invention relates to a paper container for accommodating liquid contents.

In the past, as a paper container for accommodating liquid contents such as milk and juice, a cardboard material with thermoplastic resin laminated on the front and back was widely used. A cylindrical body part that forms four corners by joining the edge parts together, and a pair of gable-shaped roof-forming sheets and a pair of gable-wall-forming sheets are connected at the upper end of the body sheet body, and the pair of gable-shaped roof-forming sheets , which has an outer top sealing sheet on the upper part and faces each other, the pair of gable walls forms a sheet, has an inner top sealing sheet on the upper part, and faces each other, and either one becomes a spout and is unsealed A pair of gable wall forming sheets are folded between a pair of gable roof forming sheets, and the outer top sealing sheet is heated at a predetermined position and the inner top sealing sheet is sealed and sealed to form a top mountain shape Roof type paper container.

The opening of such a gable-roof type paper container is performed by inserting a finger into the space opened between the pair of gable-roof-forming sheets, the body sheet and the gable-wall sheet, and placing the finger on the opening. After the gable wall is formed into a sheet body, it is unfolded to the left and right, the heat-sealed opposing surfaces of the outer top sealing sheet body and the inner top sealing sheet body on the unsealed side are peeled off, and then the folded gable roof sheet body is pulled out. The above-mentioned gable wall in between forms a thin body, and is folded outward from the top horizontal fold line which is bounded by the body part thin body connected via the top horizontal fold line, and the spout is opened. However, when the user's hand is large, when the paper container is small, or when the height of the gable roof is made low for the purpose of saving space, etc., it is formed on the body sheet and the mountain. Since the space between the wall-forming sheets is small, it is difficult to place a finger on the gable wall to form the sheets, and there is a problem that the so-called unsealing operation is not easy to perform.

As paper containers for solving such problems, in recent years, a gable-wall-forming sheet that is pulled out when the paper container is opened, and a body sheet that is connected to the gable-wall-forming sheet are known. A gable-roof type paper container in which an auxiliary fold line that decreases toward the center of the body sheet from one end of the top horizontal fold line to the other end is formed near the top horizontal fold line of the border of the sheet body. (For example, refer to Patent Document 1.).

According to the gabled roof type paper container formed with such an auxiliary fold line, when the top corner of the trunk formed by the top horizontal fold line is pushed inward of the container, it is mountain-folded from the auxiliary fold line, and the top corner is bent inward of the container , and the upper part sandwiched by the top horizontal fold line of the carcass thin body and the opening auxiliary horizontal line is recessed toward the inside of the container. Thereby, when a finger is placed on the gable wall to form a sheet at the time of opening, since the space for placing the finger is wide, the opening operation of the paper container becomes easy. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2002-234524

[Problems to be Solved by Invention]

However, in the paper container described in Patent Document 1, when the paper container is opened, the top corner of the trunk formed by the top horizontal fold line is pushed into the inside of the container and is bent inward, however, because The top corners function as ribs, so a strong force is required to bend the top corners of the carcass inwards, and it may be difficult to open the so-called paper container for weak elderly, women, and children. question. In addition, the bending position of the top corner portion differs depending on the position where the top corner portion is pushed in. As a result, the upper portion sandwiched by the top horizontal folding line of the body sheet and the opening auxiliary horizontal line is recessed toward the inside of the container. The size of the formed space cannot be fixed, and there is a problem that it is difficult to put a finger there.

An object of the present invention is to provide a paper container which can be easily opened by denting the upper end of the body sheet with a small force when the paper container is unsealed. [Technical means to solve problems]

In order to achieve the above-mentioned object, the invention described in claim 1 is a paper container, which is formed of a cardboard material having thermoplastic resin laminated on the front and back, and includes four body sheets, which are sealed by longitudinal sealing sheets. A cylindrical body part that forms four corners by joining the edge parts, and a pair of gable-shaped roof-forming sheets and a pair of gable-wall-forming sheets are connected on the upper end of the body sheet body, and the pair of gable-shaped roof-forming sheets The body has an outer top sealing sheet on the upper part and faces each other, the pair of gable walls forms a sheet, has an inner top sealing sheet on the upper part, and faces each other, and either one becomes a spout and is Unsealing, folding the pair of gable wall forming sheets between the pair of gable roof forming sheets, heating the outer top sealing sheet at a predetermined position and sealing the inner top sealing sheet by sealing and forming The top gable roof type paper container is characterized in that a downward curved first auxiliary fold line is formed on the body sheet body on the unsealed side, and the gable wall forming sheet on the unsealing side is connected through the top horizontal fold line. The first auxiliary fold line is arranged so as to connect the ends of the longitudinal fold lines of the body on both sides of the body sheet on the unsealed side or the positions near the intersections of the ends of the horizontal folds of the top portion. In addition, on the slightly triangular surface portion of the gable wall-forming sheet body having the unsealed side, or the slightly triangular surface portion of the gable wall-forming sheet body having the unsealing side, and the body portion sheet body on the unsealing side, there are formed The second auxiliary fold line extending in the vertical direction in the horizontal center portion.

According to the invention set forth in claim 1, the gable-wall-forming sheet on the unsealing side is formed with the first auxiliary fold line downward in the shape of a curve, and the body sheet on the unsealing side is formed in series through the top horizontal fold line. The fold line is arranged so as to connect the ends of the longitudinal fold lines of the body on both sides of the body sheet on the unsealed side, and the ends of the top horizontal fold lines at or near the intersections with each other. The slightly triangular surface portion of the gable wall-forming sheet body provided with the unsealing side or the slightly triangular surface portion of the gable wall-forming sheet body having the unsealing side and the body portion sheet body of the unsealing side are formed such that the horizontal center portion is in the vertical direction. Therefore, when the paper container is opened, by pushing the top corner of the cylindrical body part, the upper end of the body sheet is mountain-folded from the first auxiliary folding line, and the The slightly triangular surface portion and the upper end portion of the thin body of the carcass can be recessed.

At this time, the slightly triangular surface portion or the slightly triangular surface portion and the body sheet body are valley-folded from the second auxiliary folding line, and the center portion of the top corner of the cylindrical body portion is induced to face the paper container. Inward bending, since the central part of the top corner of the cylindrical body can be easily bent toward the inner side of the paper container, the slightly triangular surface and the thin body of the body can be bent with a small pushing force. The upper end is easily dented.

In addition, since the bending position of the top corner portion is fixed by the second auxiliary folding line, the gable wall on the unsealing side is formed by the slightly triangular surface portion and the depression in the upper end portion of the body sheet. The size of the space in which the sheet body is formed is constant.

The invention according to claim 2 is characterized in that the downward curved first auxiliary polyline according to claim 1 is an arc shape, a V shape, a polygonal shape, or a combination thereof.

According to the invention set forth in claim 2, since the first auxiliary folding line has an arc shape, a V shape, a polygonal shape, or a combination thereof, when the paper container is unsealed, the top horizontal fold is pushed in and folded. When the top corner of the cylindrical body part formed by the folding line is at or near the top corner, the thin body of the body part can be easily folded from the first auxiliary folding line, and the upper end of the thin body of the body part can be easily folded. sunken.

The invention described in claim 3 is characterized in that the first auxiliary broken line described in claim 1 or claim 2 is a continuous line.

According to the invention of claim 3, since the first auxiliary folding line is a continuous line, even if the basis of the cardboard material forming the paper container is large, the body sheet can be easily mountain-folded from the first auxiliary folding line.

The invention described in claim 4 is characterized in that the first auxiliary broken line described in claim 1 or claim 2 is a discontinuous line.

According to the invention of claim 4, since the first auxiliary fold line is a discontinuous line, even if the basis weight of the cardboard material forming the paper container is small, the first auxiliary fold line formed on the body sheet does not become a By reducing the strength of the paper container, the strength necessary for the paper container can be maintained.

The invention according to claim 5 is characterized in that the slightly triangular face portion and the body portion thin body, or the substantially triangular face portion and the body portion sheet body described in any one of claims 1 to 4 are combined. In any one of the above-mentioned top horizontal broken lines, a point display part indicating a pressed point is provided at or near the center of the top horizontal broken line.

According to the invention set forth in claim 5, when straddling either the slightly triangular surface portion and the body portion thin body, or the substantially triangular surface portion and the body portion thin body, since the center portion of the top transverse fold line or the A dot display portion indicating the pressing point is provided nearby, so that the center portion of the top corner of the cylindrical body portion or its vicinity can be surely pressed by the dot display portion when the paper container is opened.

The invention described in claim 6 is characterized in that the dot display portion described in claim 5 is formed by embossing.

According to the invention of claim 6, since the dot display portion is formed by embossing, even when the dot display portion is not easily seen, the dot display portion can be easily recognized by touch. Moreover, by visually recognizing the embossing, the effect of the design of the paper container can be exhibited.

The invention according to claim 7 is characterized in that the inner top sealing sheet as described in any one of claims 1 to 6 is connected to the upper part of the gable wall forming sheet on the side that becomes the spout and is unsealed. The top becomes a straight line.

According to the invention described in claim 7, since the upper side of the inner top sealing sheet connected to the upper part of the gable wall forming sheet on the side that becomes the spout and is unsealed is linear, the inner top sealing sheet has a linear shape. , The sealing area of the outer top sealing sheet connected to the upper part of the pair of gable roof forming sheets located on both sides of the inner top sealing sheet is small, and the inner top sealing sheet can be easily peeled off from the above The sheet is top-sealed on the outside, and the aforementioned paper container can be easily unsealed.

The invention according to claim 8 is characterized in that the inner top sealing sheet according to any one of claims 1 to 7 is connected to the upper part of the gable wall forming sheet on the side that becomes the spout and is unsealed. The inner surface of the body is provided with a first easy-peeling area, and the inner surface of the outer top sealing sheet connected to the upper part of the pair of gable roof-forming sheets located on both sides of the outer top sealing sheet is about half of the horizontal length direction. A second easy-peel region overlapping with the first easy-peel region is provided in a portion close to the inner top sealing sheet.

According to the invention paper container according to claim 8, since the first easy peeling area is provided on the inner surface of the inner top sealing sheet connected to the upper part of the gable wall forming sheet on the side that becomes the spout to be unsealed, the About half of the lateral length direction of the inner surface of the outer top sealing sheet connected to the upper part of the pair of gable roof forming sheets located on both sides of the outer top sealing sheet is arranged close to the part of the inner top sealing sheet and the above Since the second easy-peel region overlaps the first easy-peel region, the inner topseal sheet and the outer topseal sheet can be easily peeled off, and the paper container can be easily unsealed.

The invention according to claim 9 is characterized in that the lateral width of the thin body of the trunk portion according to any one of claims 1 to 8 is 57 mm or less.

According to the invention described in claim 9, even if the body sheet has a small paper container with a lateral width of 57 mm or less, it is possible to form a pocket for placing the sheet on the gable wall on the unsealed side when the paper container is opened. Spacious space for fingers. [Effect of invention]

As described above, according to the paper container of the present invention, when the paper container is unsealed, the upper end of the body sheet can be dented with a small force, and the paper container can be easily unsealed.

Hereinafter, the form for carrying out the paper container of this invention is demonstrated in detail, referring drawings. 1 to 10 show a first example of an embodiment of the paper container according to the present invention, FIG. 1 shows a plan view of a carton blank of the paper container according to the first example, and FIG. 2 shows the end of the first auxiliary folding line shown in FIG. 1 . FIG. 3 , FIG. 4 , FIG. 5 , and FIG. 6 each show explanatory views of other examples of the shape of the first auxiliary broken line shown in FIG. 1 , and FIG. 7 shows the first auxiliary line shown in FIG. 1 . 2. Explanatory views of other examples of the shape of the auxiliary folding line. FIG. 8 shows a side view of the paper container formed from the carton blank shown in FIG. 1. FIG. 9 shows the first auxiliary folding line for bending the paper container shown in FIG. 8. and the second auxiliary folding line, an enlarged side explanatory view of a state in which the body portion is recessed, and FIG. 10 is a perspective view of the paper container shown in FIG. 9 .

The paper container of the first example is formed from a carton blank 1 in which a cardboard material of thermoplastic resin is laminated on the front and back as shown in FIG. 1 . The carton blank 1 includes four body sheet bodies 5, 6, 7, and 8 that are connected in series through the body vertical folding lines 2, 3, and 4. When the paper container is formed, the four body sheets 5, 6, 7, and 8 are joined to the longitudinal sealing sheet 10 and the body sheet 5 which are continuously connected via the longitudinal folding line 9 of the body and the body sheet 8. The edge portion 11 of the paper container forms the cylindrical body portion 12 of the four corners of the paper container.

At the upper ends of the body sheets 6 and 8, there are outer top sealing sheets 13 and 14 on the upper part, and a pair of gable-shaped roof-forming sheets 15 and 16 facing each other are connected via top horizontal fold lines 17 and 18. In addition, at the upper ends of the body part sheets 5 and 7, there are inner top sealing sheets 19 and 20 in the upper part, and either one of them facing each other through the top horizontal fold lines 24 and 25 is a pair of which the spout 21 is unsealed. The gables form the laminae 22,23. In the first example, the gable wall forming sheet 23 is used as the gable wall forming sheet on the unsealing side.

The gable roof forming sheets 15 and 16 are formed with guide folding lines 26 and 27 on the gable wall forming sheet 23 side on the unsealing side to guide the bending of the gable roof forming sheets 15 and 16 during unsealing. In addition, the gable roof forming sheet 15 is provided with a spout 30 for straws, and the spout for straws is formed by a first half-cut 29 formed from the back side and serving as a straw insertion opening, and a first half-cut 29 surrounding the straw. The second half-cut 28 formed on the surface side is constituted.

Folding fold lines 31 , 32 , 33 , 34 for folding the gable wall forming sheets 22 and 23 are formed on the gable wall forming sheets 22 and 23 . Moreover, slightly triangular surface parts 35 and 36 surrounded by the folding lines 31, 32, 33, and 34 for folding and the top horizontal folding lines 24 and 25 are formed.

When forming the paper container, a pair of gable-wall-forming sheets 22 and 23 are folded between the pair of gable-roof-forming sheets 15 and 16, and the outer top sealing sheets 13 and 14 are heated at predetermined positions. The inner top sealing sheets 19 and 20 are closed and sealed, and as shown in FIG. 8 , a gable roof type top 37 is formed on the paper container. A gable-shaped roof 37 is formed between the pair of gable-roof-forming sheets 15, 16, the body sheet 7 on the unsealing side, and the gable-wall-forming sheet 23 on the unsealing side, and the opening of the paper container is opened. When placing a finger on the gable on the unsealed side, a finger-inserting space 38 for the sheet body 23 is formed. The slightly triangular surface portion 36 formed on the gable-wall-forming sheet body 23 is located on the deep surface of the space 38 .

In addition, a downward curved first auxiliary fold line 43 is formed on the body sheet 7, and the first auxiliary fold line is formed on the unsealed side of the unsealed side forming sheet 23 through the top horizontal fold line 25 and the gable wall of the unsealed side. The end portions 41 and 42 are arranged so that the end portions of the body vertical fold lines 3 and 4 on both sides of the body sheet 7 and the end portion of the top horizontal fold line 25 intersect with each other at or near the intersection 39 . In addition, the slightly triangular surface portion 36 of the sheet body 23 is formed on the gable wall on the unsealed side, and the second auxiliary folding line 58 extending the horizontal center portion in the vertical direction is formed.

First, the first auxiliary folding line 43 will be described. The first auxiliary fold line 43 is used to make the body sheet 7 a mountain fold from the first auxiliary fold line 43 when the top corner 54 of the cylindrical body portion 12 is pushed inward of the paper container when the paper container is unsealed, which will be described later. . The body sheet 7 is mountain-folded by the first auxiliary folding line 43, the upper end 45 of the body sheet 7 is recessed, and the top corner 54 of the cylindrical body 12 is bent toward the inside of the paper container.

In the first example, the ends 41 and 42 of the first auxiliary fold line 43 are the intersection points 39 with the ends of the body vertical fold lines 3 and 4 on both sides of the body sheet 7 and the end of the top horizontal fold line 25 . However, as shown in FIG. 2 , the end portions 41 and 42 of the first auxiliary folding line 43 may be arranged in the vicinity of the intersection 39 .

The first auxiliary folding line 43 is used to fold the body sheet 7 from the first auxiliary folding line 43 when the top corner 54 of the cylindrical body 12 is pushed inward of the paper container when the paper container is unsealed, which will be described later. By. The body sheet 7 is mountain-folded by the first auxiliary folding line 43, the upper end 45 of the body sheet 7 is recessed, and the top corner 54 of the cylindrical body 12 is bent toward the inside of the paper container.

The downward curved shape of the downward curved first auxiliary folding line 43 may be a circular arc shape or an angular arc shape. In the first example, a continuous line is used to form an arc shape. However, for example, as shown in FIG. 3 , it may be an angular arc that is bent in a V-shape, or a polygonal angular arc may be used as shown in FIG. 4 . It can also be a broken discontinuous line as shown in Figure 5 and Figure 6.

Moreover, in the first example, since the lowermost point 46 of the downward curve in which the shape of the first auxiliary fold line 43 is formed is located at the center in the left-right direction of the body thin body 7, the top corner of the cylindrical body 12 is The portion 54 can be easily pushed from its central portion toward the inside of the paper container.

In addition, in the first example, the first auxiliary folding line 43 is formed to be bilaterally symmetrical. Thereby, the space 38 can be expanded symmetrically from left to right, and the shape of the space 38 can be set in a shape that makes it easier for fingers to be inserted.

Next, the second auxiliary folding line 58 will be described. The second auxiliary fold line 58 is formed to extend from the direction of the center position of the top horizontal fold line 25 toward the apex 57 of the substantially triangular surface portion 36 in the slightly triangular surface portion 36 provided in the gable wall forming sheet 23 having the unsealed side.

Although the shape of the second auxiliary fold line 58 is not particularly limited, the lower end portion 59 of the second auxiliary fold line 58 in the direction of the center position of the top horizontal fold line 25 is located at or near the center position of the top horizontal fold line 25 Preferably, the upper end portion 59 on the side of the vertex 57 of the slightly triangular surface portion 36 is located at or near the vertex 57 of the substantially triangular surface portion 36 .

In the first example, the lower end 59 of the second auxiliary fold line 58 is located at the center of the top horizontal fold line 25 , and the upper end 60 is located at the vertex 57 of the slightly triangular surface portion 36 . FIG. 7 shows another example of the second auxiliary fold line 58. The second auxiliary fold line 58 shown in FIG. 7 is such that the lower end 59 is located near the center of the top horizontal fold line 25, and the upper end 60 is located on the slightly triangular surface. 36 near vertex 57.

In addition, although not shown, the lower end 59 of the second auxiliary fold line 58 is located in the center of the top horizontal fold line 25, and the upper end 60 may be located in the vicinity of the vertex 57 of the slightly triangular surface portion 36, and the second The lower end 59 of the auxiliary fold line 58 is located near the center of the top horizontal fold line 25 , and the upper end 60 on the apex 57 side of the slightly triangular surface portion 36 may be located at the apex 57 of the slightly triangular surface portion 36 .

In addition, in the first example, although the second auxiliary broken line 58 is a straight line, it may be a wavy line or a broken line.

Also, in the first example, a dot display portion 64 is provided, which is used as a mark when the top corner portion 54 of the cylindrical body portion 12 is pushed into the inside of the paper container when the paper container is unsealed, straddles the slightly triangular surface portion. 36 and the carcass thin body 7, or on either one of the slightly triangular surface portion 36 and the carcass thin body 7, represent the pressing point at the center of the top horizontal fold line 25 or its vicinity. In FIG. 1 , the dot display portion 64 is provided at the center portion of the top horizontal fold line 25 astride the slightly triangular surface portion 36 and the body portion sheet 7 . In FIG. 7 , it is provided in the vicinity of the top horizontal fold line 25 of the body thin body 7 . In the first example, the dot display portion 6 is formed by embossing, but the dot display portion 6 is not limited to this as long as it can be recognized, and, for example, printing may be used. In addition, the shape of the dot display part 6 is not specifically limited, For example, the effect of the design of the paper container can be exerted by modeling.

Furthermore, in the first example, bottom-forming sheets 47 and 48 are continuously provided at the lower ends of the body-forming sheets 5 and 7 , and inner sheets 49 and 50 are continuously provided at the lower ends of the body-forming sheets 6 and 8 so as to face the bottom. The inner sides of the sheets 47 and 48 are folded into the inner sheets 49 and 50, and their contact surfaces are bonded to each other to seal the bottom of the tubular body 12 to form the bottom 51 of the paper container. In addition, the structure of the bottom part 51 is not limited to the structure of the 1st example, As long as the bottom part of the cylindrical body part 12 can be closed, the structure of other well-known bottom parts in the field of paper containers can be employ|adopted.

In the first example, as shown in FIG. 1 , the upper side of the inner top sealing sheet 20 connected to the upper part of the gable forming sheet 23 on the side where the spout 21 is unsealed is linear.

In addition, a first peelable area 52 is provided on the inner surface of the inner top sealing sheet 20, and the outer top sealing sheet is continuously provided on the upper part of the pair of gable roof forming sheets 15 and 16 located on both sides thereof. The second easy-peeling region 53 overlapping the first easy-peeling region 52 is provided on the inner surface of 13 and 14 in a portion close to the inner top sealing sheet 20 in about half of the horizontal direction. On the inner surface of the inner top sealing sheet 20 and the inner surfaces of the outer top sealing sheets 13 and 14, the positions of the first easy-peeling regions 52 and the second easy-peeling regions 53, and the contour shapes of the region surfaces can be maintained as long as the parts can be maintained. The sealing property by which the liquid slug is produced is not particularly limited.

In addition, the lateral widths of the body sheets 5, 6, 7, and 8, and the basis weight of the cardboard material forming the paper container, which are one of the main factors that determine the size of the paper container, are not particularly limited, but in the first example, The lateral width of the body sheets 5, 6, 7, and 8 is 57 mm or less, and the basis weight of the cardboard material is 150 to 250 g/m ² .

The unsealing of such a paper container is performed as follows. First, the top corner portion 54 of the cylindrical body portion 12 formed by the top horizontal fold line 25 is pushed in and bent toward the inside of the paper container, and is pressed. As a result, the inner corners are opened as the top corners 54 are pushed toward the inside of the paper container, and the upper end 45 of the body sheet 7 protrudes outwardly of the paper container as it goes downward from the top corners 54 . deform.

At this time, since the second auxiliary fold line 58 extending from the center position of the top horizontal fold line 25 in the direction of the apex 57 of the slightly triangular surface portion 36 is formed on the slightly triangular surface portion 36, the top corner portion is pushed in by pushing the second auxiliary fold line 58. 54. The slightly triangular surface portion 36 is valley-folded from the second auxiliary folding line 58, and the center portion of the top corner portion 54 is induced to be bent toward the inside of the paper container.

When a certain amount of force is applied, the first auxiliary folding line 43 is folded in a mountain and protrudes outward to form a protruding portion 55. Then, the top corner portion 54 is bent toward the inside of the paper container with the center as the center to form a body sheet. The slightly triangular surface portion 36 of the upper end portion 45 and the deep surface of the space 38 in 7 is recessed toward the inside of the paper container. Thereby, the space 38 is widened only by the concave amount of the upper end portion 45 and the slightly triangular surface portion 36 , and the space 38 where fingers are easily inserted during opening is formed.

Then, put your finger into the widened space 38, put your finger on the gable wall forming sheet 23 on the unsealed side, spread the gable wall forming sheet 23 and the pair of gable roof forming sheets 15 and 16 to the left and right, and tear it off. The opposing surfaces of the outer top sealing sheets 13 and 14 and the inner top sealing sheet 20 are opened. Then, the gable wall forming sheet body 23 folded between the pair of gable roof forming sheet bodies 15 and 16 is pulled out, the spout 21 is opened, and the paper container is unsealed.

According to the paper container of the first example configured as described above, the gable-wall-forming sheet 23 on the unsealing side is formed in series with the trunk-portion sheet 7 on the unsealing side through the top horizontal fold line 25, and the first downward curved line is formed. The auxiliary fold line 43 is the first auxiliary fold line, which is the position of the intersection 39 or the vicinity of the intersection point 39 between the ends of the body vertical fold lines 3 and 4 connecting both sides of the body sheet 7 and the end of the top horizontal fold line 25 The end portions 41 and 42 are arranged so as to be mutually aligned, and the slightly triangular surface portion 36 of the sheet body 23 having the gable wall having the unsealed side is formed with the second auxiliary fold line 58 extending the horizontal center portion in the vertical direction. When the paper container is unsealed, by pushing the top corner 54 of the cylindrical body 12, the upper end 45 of the body sheet 7 is folded from the first auxiliary folding line 43, and the slightly triangular surface 36 can be folded. And the upper end 45 of the body thin body 7 is recessed.

At this time, the slightly triangular surface portion 36 is valley-folded from the second auxiliary folding line 58, and the central portion of the top corner portion 54 of the cylindrical body portion 12 is induced to be bent toward the inside of the paper container. The center portion of the corner portion 54 is easily bent toward the inside of the paper container, so the slightly triangular surface portion 36 and the upper end portion 45 of the body sheet 7 can be easily dented with a small pushing force.

In particular, when the lower end 59 of the second auxiliary fold line 58 in the direction of the center position of the top horizontal fold line 25 is located at or near the center position of the top horizontal fold line 25 , the upper side on the vertex 57 side of the triangular surface portion 36 is slightly higher. If the end 60 is located at or near the vertex 57 of the slightly triangular surface portion 36, when the top corner portion 54 is pushed in, the slightly triangular surface portion 36 is easily folded from the valley of the second auxiliary folding line 58, thereby effectively guiding the When the center portion of the top corner portion 54 is bent toward the inside of the paper container, the slightly triangular surface portion 36 and the upper end portion 45 of the body portion sheet 7 can be further easily dented.

In addition, the second auxiliary fold line 58 is formed on the substantially triangular surface portion 36 so as to extend from the direction of the central position of the top horizontal fold line 25 toward the vertex 57 of the substantially triangular surface portion 36. Therefore, the bending of the top corner portion 54 The position is constant, and the width of the space 38 formed by the depression of the upper part sandwiched by the top horizontal fold line 25 and the first auxiliary fold line 43 toward the inside of the container is constant, so that stable unsealing is possible.

In addition, since the downward curved first auxiliary fold line 43 has an arc shape, a V-shape, a polygonal shape, or a combination thereof, when the paper container is opened, the folding top horizontal fold line 25 is pushed in. When the top corner 54 or the vicinity of the top corner 54 of the formed tubular body 12 is formed, the upper end 45 of the body sheet 7 can be easily mountain-folded from the first auxiliary folding line 43, and the body sheet can be folded easily. The upper end portion 45 of the body 7 is easily dented.

In addition, since the first auxiliary folding line 43 forms a continuous line or a discontinuous line, when the first auxiliary folding line 43 is a continuous line, even if the basis weight of the cardboard material forming the paper container is larger, the above-mentioned first auxiliary folding line can be used. It is easy to fold the aforementioned thin body of the carcass into a mountain fold. In addition, the first auxiliary fold line 43 is a discontinuous line, and even if the basis weight of the cardboard material forming the paper container is small, the first auxiliary fold line 43 formed on the body sheet 7 does not reduce the strength of the paper container. , it can maintain the necessary strength as a paper container.

In addition, on either of the slightly triangular surface part 36 and the body thin body 7, or the slightly triangular surface part 36 and the body part thin body 7, since the center part of the top horizontal fold line 25 or its vicinity is provided with a pressing point Therefore, when the paper container is opened, the dot display part 64 can be pushed into the center part of the top corner 54 of the cylindrical body part 12 or its vicinity. Moreover, the dot display part 64 is a When it is formed by embossing, when the point display part 64 is not easily seen visually, the point display part 64 can be easily confirmed by the sense of touch. In addition, since the embossing can be visually recognized, the shape of the dot display portion 64 can be molded, and the effect of the design of the paper container can be exhibited.

In addition, since the first easily peelable region 52 is provided on the inner surface of the inner top sealing sheet 20, about half of the inner surface of the outer top sealing sheet 13 and 14 located on both sides of the inner surface in the lateral length direction, The portion close to the inner top sealing sheet 20 is provided with the second easy peeling area 53 overlapping the first easy peeling area 52, so that the inner top sealing sheet 20 and the outer top sealing sheets 13 and 14 can be easily peeled off.

11 to 18 show a second example of the embodiment of the paper container according to the present invention; FIG. 11 shows a plan view of a carton blank of the paper container according to the second example; Fig. 17 is an explanatory diagram showing another example of the shape of the second auxiliary folding line shown in Fig. 11; Fig. 17 is a first auxiliary folding line of the paper container formed from the carton blank shown in Fig. 11, showing the bending of the second auxiliary folding line 18 is a perspective view of the paper container shown in FIG. 17 .

The basic structure of the paper container of the second example is not changed from the paper container of the first example, and the same reference numerals are attached to the same structure as that of the first example and will be described. The difference from the first example of the paper container of the second example is that the slightly triangular surface portion 36 provided in the body sheet 7 on the unsealing side and the gable wall 23 on the unsealing side is formed from the first auxiliary folding line. A second auxiliary line 61 extending in the direction of the lowermost point 46 of the central portion 43 across the top horizontal fold line 25 in the direction of the apex 57 of the substantially triangular surface portion 36 .

Although the shape of the second auxiliary fold line 61 is not particularly limited, the second auxiliary fold line 61 is the lowermost point 46 of the first auxiliary fold line 43. The lower end 62 is located at the lowermost point 46 of the first auxiliary fold line 43. Alternatively, in the vicinity of the lowermost point 46 , the upper end 63 on the side of the vertex 57 of the slightly triangular surface portion 36 is preferably located at or near the vertex 57 of the substantially triangular surface portion 36 .

In the second example, the lower end 62 of the second auxiliary fold line 61 is located at the lowermost point 46 of the first auxiliary fold line 43 , and the upper end 63 is located at the vertex 57 of the slightly triangular surface portion 36 . In addition, although not shown, the lower end 62 of the second auxiliary folding line 61 may be located at the lowest point 46 of the first auxiliary folding line 43, and the upper end 63 may be located in the vicinity of the vertex 57 of the slightly triangular surface portion 36, Alternatively, the lower end 62 of the second auxiliary fold line 61 may be positioned near the lowest point 46 of the first auxiliary fold line 43 , and the upper end 63 may be positioned at the vertex 57 of the slightly triangular surface portion 36 .

FIG. 12 , FIG. 13 , FIG. 14 , FIG. 15 , and FIG. 16 show other examples of the shape of the second auxiliary broken line 61 , respectively. The second auxiliary fold line 61 shown in FIG. 12 is such that the lower end 62 is located at the lowest point 46 of the first auxiliary fold line 43 , and the upper end 63 is located near the vertex 57 of the approximately triangular surface portion 36 . The second auxiliary folding line 61 shown in FIG. 13 has an arrow-shaped front end of the lower end portion 62 of the second auxiliary folding line 61 shown in FIG. 12 . The second auxiliary broken line 61 shown in FIG. 14 has a wavy line shape. The second auxiliary broken lines 61 shown in FIG. 15 are two lines. The second auxiliary fold line 61 shown in FIG. 16 has a shape in which a plurality of circles are arranged linearly.

In addition, the fact that the second auxiliary fold line 61 straddles the top horizontal fold line 25 does not necessarily mean that an intersection is formed between the second auxiliary fold line 61 and the top horizontal fold line 25, but also includes that the second auxiliary fold line 61 is divided at the top horizontal fold line 25. There is no connection with the top horizontal fold line 25. Since other structures are the same as those of the first example, the first example is used and the description thereof is omitted.

The opening of the paper container of the second example is similar to that of the first example. First, the top corner 54 of the cylindrical body 12 formed by the top horizontal fold line 25 is bent and pushed toward the inside of the paper container, and is pressed. As a result, the inner corners are opened as the top corners 54 are pushed toward the inside of the paper container, and the upper end 45 of the body sheet 7 protrudes outwardly of the paper container as it goes downward from the top corners 54 . deform.

At this time, the upper end portion 45 and the slightly triangular surface portion 36 of the body portion sheet 7 are formed from the direction of the lowermost point 46 of the central portion of the first auxiliary fold line 43 across the top lateral fold line 25 toward the apex of the slightly triangular surface portion 36 . Since the second auxiliary fold line 61 extending in the 57 direction is pushed in, the upper end portion 45 and the slightly triangular surface portion 36 of the body sheet 7 are valley-folded from the second auxiliary line 61 by pushing the top corner portion 54, and The center portion of the top corner 54 is induced to bend toward the inside of the paper container.

When a certain amount of force is applied, the first auxiliary folding line 43 is folded in a mountain and protrudes outward to form a protruding portion 55. Then, the top corner portion 54 is bent toward the inside of the paper container with the center as the center to form a body sheet. The slightly triangular surface portion 36 of the upper end portion 45 and the deep surface of the space 38 in 7 is recessed toward the inside of the paper container. Thereby, the space 38 is widened only by the concave amount of the upper end portion 45 and the slightly triangular surface portion 36 , and the space 38 where fingers are easily inserted during opening is formed. Since other unpacking methods are the same as those of the first example, the first example is used, and the description thereof is omitted.

According to the paper container of the second example configured as above, since the body sheet 7 and the slightly triangular surface portion 36 are formed with the direction of the lowermost point 46 of the central portion of the first auxiliary fold line 43 across the top horizontal fold line 25 toward the slightly Because of the second auxiliary folding line 61 extending in the direction of the vertex 57 of the triangular surface portion 36, when the top corner portion 54 is pushed in, the upper end portion 45 and the slightly triangular surface portion 36 of the body sheet 7 are troughed from the second auxiliary line 61. Folding, and inducing the central portion of the top corner 54 to bend toward the inside of the paper container, allows the slightly triangular surface portion 36 and the upper end portion 45 of the body portion sheet body 7 to be easily dented.

In particular, since the lower end 62 of the second auxiliary fold line 43 in the direction of the lowermost point 46 of the first auxiliary fold line 43 is located at or near the lowermost point 46 of the first auxiliary fold line 43 , it is slightly triangular. The upper end portion 63 on the side of the vertex 57 of the face portion 36 is located at or near the vertex 57 of the slightly triangular face portion 36. Therefore, when the top corner portion 54 is pushed in, the upper end portion 45 of the body thin body 7 is slightly close to the vertex 57. The triangular-shaped surface portion 36 is easily valley-folded from the second auxiliary folding line 61, thereby effectively inducing the central portion of the top corner 54 to bend toward the inside of the paper container. The upper end portion 45 in the body 7 is further easily dented.

1: carton blank 2, 3, 4: longitudinal fold line of the carcass 5, 6, 7, 8: carcass flakes 9: carcass vertical fold line 10: Longitudinal sealing sheet 11: Edge 12: Tubular Carcass 13,14: Outer top sealing sheet 15, 16: Gable roofs form lamellae 17,18: Top horizontal line 19,20: inner top seal sheet 21: Note outlet 22, 23: Gables form lamellae 24,25: top horizontal line 26,27: Guide Polyline 28: 2nd half cut 29: 1st Half Cut 30: Injection port for straw 31, 32, 33, 34: Folding lines for folding 35,36: Slightly triangular face 37: Top 38: Space 39: Intersection 41,42: The end of the 1st auxiliary polyline 43: 1st auxiliary polyline 45: Unpack and measure the upper end of the carcass sheet 46: The lowest point of the first subsidy line 47, 48: The bottom surface forms a thin body 49,50: inner sheet 51: Bottom 52: 1st easy peel area 53: 2nd easy peel area 54: top corner 55: Protrusions 57: Vertices of the slightly triangular face 58: 2nd auxiliary polyline 59: The lower end of the second auxiliary fold line 60: The upper end of the second auxiliary fold line 61: 2nd auxiliary polyline 62: The lower end of the second auxiliary fold line 63: The upper end of the second auxiliary fold line 64: Point Display

[ Fig. 1] Fig. 1 is a plan view of a carton blank showing a first example of an embodiment of the paper container of the present invention. [ Fig. 2] Fig. 2 is an explanatory diagram showing another example of the position of the end portion of the first auxiliary broken line shown in Fig. 1 . [ Fig. 3] Fig. 3 is an explanatory diagram showing another example of the shape of the first auxiliary polyline shown in Fig. 1 . [ Fig. 4] Fig. 4 is an explanatory diagram showing another example of the shape of the first auxiliary broken line shown in Fig. 1 . [ Fig. 5] Fig. 5 is an explanatory diagram showing another example of the shape of the first auxiliary broken line shown in Fig. 1 . [ Fig. 6] Fig. 6 is an explanatory diagram showing another example of the shape of the first auxiliary broken line shown in Fig. 1 . [ Fig. 7] Fig. 7 is an explanatory diagram showing another example of the shape of the second auxiliary polyline shown in Fig. 1 . [ Fig. 8 ] A side view showing a paper container formed from the carton blank shown in Fig. 1 . [ Fig. 9] Fig. 9 is an enlarged side explanatory view showing a state in which the first auxiliary folding line and the second auxiliary folding line of the paper container shown in Fig. 8 are bent and the trunk portion is dented. 10 is a perspective view of the paper container shown in FIG. 9 . [ Fig. 11] Fig. 11 is a plan view of a carton blank showing a second example of the embodiment of the paper container of the present invention. [ Fig. 12] Fig. 12 is an explanatory diagram showing another example of the shape of the second auxiliary polyline shown in Fig. 11 . [ Fig. 13] Fig. 13 is an explanatory diagram showing another example of the shape of the second auxiliary polyline shown in Fig. 11 . [ Fig. 14] Fig. 14 is an explanatory diagram showing another example of the shape of the second auxiliary polyline shown in Fig. 11 . [ Fig. 15] Fig. 15 is an explanatory diagram showing another example of the shape of the second auxiliary polyline shown in Fig. 11 . [ Fig. 16] Fig. 16 is an explanatory diagram showing another example of the shape of the second auxiliary polyline shown in Fig. 11 . [ Fig. 17 ] An enlarged side explanatory view showing a state in which the first auxiliary folding line and the second auxiliary folding line of the paper container formed of the carton blank shown in Fig. 11 are folded. 18 is a perspective view of the paper container shown in FIG. 17 .

1: carton blank

2: carcass vertical fold line

3: carcass vertical fold line

4: carcass vertical fold line

5: carcass flakes

6: carcass flakes

7: carcass flakes

8: carcass flakes

9: carcass vertical fold line

10: Longitudinal sealing sheet

11: Edge

12: Tubular Carcass

13: Outer top sealing sheet

14: Outer top sealing sheet

15: Gable roofs form thin bodies

16: Gable roofs form lamellae

17: Top horizontal fold line

18: Top horizontal fold line

19: inner top sealing sheet

20: inner top sealing sheet

21: Note outlet

22: Gable walls form thin bodies

23: Gables form thin sheets

24: Top horizontal fold line

25: Top horizontal fold line

26: Guide Polyline

27: Guide Polyline

28: 2nd half cut

29: 1st Half Cut

30: Injection port for straw

31: Folding line for folding

32: Folding line for folding

33: Folding line for folding

34: Folding line for folding

35: Slightly triangular face

36: Slightly triangular face

39: Intersection

41: The end of the first auxiliary polyline

42: The end of the first auxiliary polyline

43: 1st auxiliary polyline

45: Unpack and measure the upper end of the carcass sheet

46: The lowest point of the first subsidy line

47: The bottom surface forms a thin body

48: The bottom surface forms a thin body

49: inner sheet

50: inner sheet

52: 1st easy peel area

53: 2nd easy peel area

57: Vertices of the slightly triangular face

58: 2nd auxiliary polyline

59: The lower end of the second auxiliary fold line

60: The upper end of the second auxiliary fold line

64: Point Display

Claims (9)

A paper container is formed of a cardboard material with thermoplastic resin laminated on the front and back, and includes four body sheets, and a four-cornered cylindrical body is formed by longitudinally sealing the edges of the sheet bodies to form a four-cornered cylindrical body. A pair of gable-roof-forming sheets and a pair of gable-wall-forming sheets are connected on the upper end of the carcass sheet body, and the pair of gable-roof-forming sheets are provided with an outer top sealing sheet at the upper part, and are mutually connected to each other. Opposite, the pair of gables are formed as thin sheets, have inner top sealing sheets on the upper part, and are opposed to each other, and either one becomes a spout and is unsealed, and the pair of gable roofs are formed between the sheets. A gable roof type paper container in which the above-mentioned pair of gable walls are folded to form a sheet, and the outer top sealing sheet and the inner top sealing sheet are sealed by heating the outer top sealing sheet at a predetermined position and sealed to form the top, is characterized by: A downward curved first auxiliary fold line is formed on the gable-shaped sheet body on the unsealed side, which is connected through the top horizontal fold line. The first auxiliary fold line is connected to the unsealed side. The end portions of the body portion sheet body on both sides of the body portion vertical fold line and the end portion of the top horizontal fold line are arranged so that the intersections or the positions near the intersection points are mutually, and the end portions are arranged on the gable wall having the opening side. The slightly triangular surface portion of the sheet body or the gable wall with the opening side is formed The slightly triangular surface portion of the sheet body and the body portion sheet body of the unsealed side are formed with a second auxiliary fold line extending the horizontal center portion in the longitudinal direction . The paper container according to claim 1. Here, the first auxiliary folded line in the downward curve shape is an arc shape, a V shape, a polygonal shape, or a combination thereof. The paper container according to claim 1 or claim 2, wherein the first auxiliary folding line is a continuous line. The paper container according to claim 1 or claim 2, wherein the first auxiliary folding line is a discontinuous line. The paper container according to any one of Claims 1 to 4, wherein, when straddling either the substantially triangular surface portion and the body portion sheet, or the substantially triangular surface portion and the body portion sheet, the above A point display part indicating the pressed point is provided at or near the center of the top horizontal broken line. The paper container according to claim 5, wherein the dot display portion is formed by embossing. The paper container according to any one of Claims 1 to 6, wherein the upper edge of the inner top sealing sheet connected to the upper portion of the gable wall forming sheet on the side to be unsealed as the spout is linear. The paper container according to any one of claims 1 to 7, wherein a first top sealing sheet is provided on the inner surface of the inner top sealing sheet connected to the upper portion of the gable wall forming sheet on the side that becomes the spout and is unsealed. 1. In the easily peelable area, approximately half of the lateral length direction of the inner surface of the outer top sealing sheet connected to the upper part of the pair of gable roof forming sheets located on both sides of the outer top sealing sheet is close to the inner top sealing sheet Part of the body is provided with a second easy-peeling region overlapping the first easy-peeling region. The paper container according to any one of claims 1 to 8, wherein the lateral width of the body sheet is 57 mm or less.

Images