Paper container

Abstract

To improve the sealing strength of a paper container provided with a pop display part for sales promotion.SOLUTION: A paper container 10 comprises: a cylindrical outer circumferential wall 12; a bottom wall 20 clogging the bottom of the outer circumferential wall 12; and a pop display part 30 for advertisement display provided inside a front wall 13. The pop display part 30 is partitioned by a folding line 31 and a pair of break lines 32, and is further partitioned into a folded part 34 and a display body part 35 by the folding line 33. The folding line 31 includes an insertion hole 31a at an intermediate part in a width direction, and the display body part 35 is continuously provided with an insertion piece 36 insertable into the insertion hole 31a. An upper end edge of a rear wall 14 opposed to the pop display part 30 is continuously provided with a lid wall 40, the lid wall 40 is continuously provided with a lid insertion piece 42 inserted into the front wall 13, and the lid insertion piece 42 is provided with a lock hole 44 into which the insertion piece 36 can be inserted.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a paper container. [Background technology]

[0002] The paper container disclosed in Patent Document 1 has a rectangular cylindrical outer wall and a bottom wall that closes the bottom of the outer wall, and a pop display section is formed on the front wall that constitutes the outer wall, partitioned by a break line. Patent Document 1 also discloses a paper container further including a cover wall that closes the upper end opening of the outer wall. The pop display section is broken from the front wall along the break line, and an insert piece connected to the pop display section is inserted into the inner surface of the front wall. This allows the pop display section to be positioned in a state where it protrudes forward from the front wall, thereby achieving a sales promotion effect for the contained goods. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4202686 Summary of the Invention [Problem to be solved by the invention]

[0004] The former paper container without a lid wall is difficult to use because it cannot be sealed when an article is contained therein, but this inconvenience does not occur with the latter paper container with a lid wall. However, in the latter paper container of Patent Document 1, the lid wall may rise due to a repulsive force, and the sealed state may not be maintained. Therefore, the paper container of Patent Document 1 has room for improvement in terms of the sealing strength to maintain the sealed state.

[0005] An object of the present invention is to improve the sealing strength of a paper container equipped with a pop display portion for sales promotion. [Means for solving the problem]

[0006] One aspect of the present invention is a paper container comprising a cylindrical outer peripheral wall having a front wall, a pair of side walls connected to both sides of the front wall in the width direction, and a rear wall connected to the pair of side walls, a bottom wall that closes the bottom of the outer peripheral wall, and a POP display section for displaying advertisements provided within the front wall, wherein the POP display section is defined by a first fold line extending along the bottom wall and a pair of first break lines that extend downward from an upper edge of the front wall and are connected to both ends of the first fold line, and further defined by a second fold line extending along the first fold line, a folded portion located between the first fold line and the second fold line, and a folded portion that is connected to the folded portion via the second fold line. and a display main body portion connected to the fold-back portion, the first fold line including an insertion hole in the middle portion in the width direction, an insertion piece that can be inserted into the insertion hole by folding the fold-back portion and the display main body portion along the first fold line and the second fold line is connected to the display main body portion, a lid wall that closes an upper end opening of the outer peripheral wall is connected to an upper edge of the rear wall facing the POP display portion, and a lid insertion piece that is inserted inside the front wall is connected to a front end of the lid wall, and a lock hole is provided in the lid insertion piece so that the insertion piece can be inserted when the fold-back portion and the display main body portion are in an unfolded state.

[0007] In this paper container, the pop display section is broken along the first break line relative to the front wall, and then the folded-back section and the display main body section are folded along the first and second fold lines, respectively. Then, the pop display section can be put into a display state by inserting an insert piece connected to the display main body section into an insertion hole included in the first fold line. Meanwhile, the insert piece can be inserted into a lock hole provided in a lid insert piece provided on the lid wall when the folded-back section and the display main body section are in an unfolded state. This allows the lid wall to be locked so that it does not easily open in the sealed state, thereby improving the sealing strength of the paper container. In this way, the insert piece has both a function for maintaining the pop display section in a display state and a locking function for maintaining the lid wall in a sealed state. Therefore, the pop display section can be displayed and the lid wall can be locked without complicating the structure of the lines and break lines of the paper container. Effect of the Invention

[0008] The present invention can improve the sealing strength of a paper container provided with a pop display portion for sales promotion. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing an example of a state in which a paper container according to a first embodiment of the present invention is used. [Diagram 2] FIG. 2 is a top perspective view showing the sealed state of the paper container of the first embodiment. [Diagram 3] FIG. 2 is a bottom perspective view showing the sealed state of the paper container of the first embodiment. [Figure 4] FIG. 2 is a plan view showing a blank for a paper container according to the first embodiment. [Diagram 5] An enlarged view of part V in Figure 4. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. 6 is a view similar to FIG. 5 showing a blank for a paper container according to a second embodiment. [Figure 10] FIG. 11 is a plan view showing a blank for a paper container according to a third embodiment. [Figure 11] FIG. 13 is a bottom perspective view showing the sealed state of the paper container of the fourth embodiment. [Figure 12] FIG. 11 is a plan view showing a blank for a paper container according to a fourth embodiment. [Figure 13] FIG. 13 is a plan view showing a blank for a paper container according to a fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0011] (First embodiment) 1 to 3, a paper container 10 according to a first embodiment of the present invention is provided with a pop display section 30 on which an advertisement for an article to be stored is printed, and is arranged on a display stand while still containing the article, thereby promoting the sale of the article. This paper container 10 is a so-called intermediate box, and is transported by storing a plurality of the paper containers in, for example, a cardboard box (outer box) not shown.

[0012] In the attached drawings, the X direction is the front-to-back direction, the direction indicated by the arrow is the front side, and the direction opposite the arrow is the rear side. The Y direction is the width direction (left-right direction), the direction indicated by the arrow is the left side, and the direction opposite the arrow is the right side. The Z direction is the height direction (up-down direction), the direction indicated by the arrow is the top side, and the direction opposite the arrow is the bottom side.

[0013] The paper container 10 is formed by folding and pasting a blank shown in Fig. 4 at predetermined locations. The part indicated by the dashed dotted line in Fig. 4 is a general-purpose crease formed by scoring from the front surface (the surface located on the outside of the paper container 10) so as to compress the wall thickness. The part indicated by the thick solid line in Fig. 4 is a cut line formed by cutting with a blade from the front surface to the back surface (the surface located on the inside of the paper container 10) and a shape line (side) formed by punching. The part indicated by the thin solid line in Fig. 4 is a half-cut line that cuts half of the thickness of the base paper.

[0014] The blank of the paper container 10 is formed by punching out a single layer of cardboard (coated cardboard) using a known paper container punching device. However, the paper container 10 may be formed from a known paper corrugated cardboard sheet having a corrugated core between a front liner and a back liner, as long as the thickness is 1.5 mm or less.

[0015] 2 and 3, a paper container 10 in a sealed state includes an outer peripheral wall 12 and a bottom wall 20 that closes the bottom of the outer peripheral wall 12. A pop display section 30 is provided in a front wall 13 that constitutes the outer peripheral wall 12, and by breaking these along a break line (first break line) 32, a first open state can be achieved in which a part of the front wall 13 is open, as in the paper container 10 in the lower row of FIG. 1. The paper container 10 further includes a lid wall 40 that openably closes the upper end opening of the outer peripheral wall 12, and by breaking the outer peripheral wall 12 along a break line (second break line) 50, a second open state can be achieved in which the lid wall 40 side is separated, as in the paper container 10 in the upper row of FIG. 1.

[0016] The present embodiment relates to a paper container 10 having a pop display section 30 and a cover wall 40, and aims to improve the sealing strength of the cover wall 40 without complicating the structure.

[0017] The configurations of the outer wall 12, bottom wall 20, pop display portion 30, cover wall 40, and break line 50 will be specifically described below in this order.

[0018] (Configuration of the outer wall) 2 and 3, the outer peripheral wall 12 is in the shape of a rectangular tube and includes a front wall 13, a rear wall 14, and a pair of side walls 15. The pair of side walls 15 are connected to the front wall 13 and the rear wall 14, respectively, via bent portions 18 extending in the height direction. However, the pair of side walls 15 may be connected to the front wall 13 or the rear wall 14 via a chamfered wall. In other words, the outer peripheral wall 12 may be in the shape of a hexagonal tube or an octagonal tube. In the following description, of the pair of side walls 15, the one located on the left side in FIG. 1 may be referred to as the left wall 15, and the one located on the right side in FIG. 1 may be referred to as the right wall 15.

[0019] The front wall 13 and the rear wall 14 are identical rectangular shapes extending along the YZ plane, and are disposed opposite each other with a gap in the front-rear direction. The pair of side walls 15 are identical rectangular shapes extending along the XZ plane, and are disposed opposite each other with a gap in the width direction, with the front-rear dimension being smaller than the width dimensions of the front wall 13 and the rear wall 14. Referring to Figures 1 and 3, the right side wall 15 is composed of a side wall main body 16 continuing to the front wall 13 and an attachment margin 17 continuing to the rear wall 14, and is attached with an adhesive (for example, hot melt).

[0020] Referring to FIG. 4, the attachment portion 17, the rear wall 14, the left side wall 15, the front wall 13, and the side wall main body 16 are connected in this order from left to right via a fold curve 18a consisting of a general-purpose crease that constitutes the fold portion 18.

[0021] (Bottom wall configuration) 3 and 4, the bottom wall 20 is of a one-touch type that can close the bottom of the outer peripheral wall 12 by opening the front wall 13, the rear wall 14, and the pair of side walls 15 into a cylindrical shape. The bottom wall 20 has a quadrangular shape extending along the XY plane, and is composed of a pair of long flaps 21 and short flaps 22. The pair of long flaps 21 are generally trapezoidal in shape and are connected to the front wall 13 and the rear wall 14 via bent portions 23. The pair of short flaps 22 are generally trapezoidal in shape and are connected to the pair of side walls 15 via bent portions 24.

[0022] 4, the pair of long flaps 21 are connected to the lower edges of the front wall 13 and the rear wall 14 via fold lines 23a consisting of general-purpose creases that form the folding portion 23. The long flaps 21 are connected to the attachment portions 21a via fold lines 21b consisting of general-purpose creases. The short flaps 22 are connected to the lower edges of the left side wall 15 and the side wall main body 16 via fold lines 24a consisting of general-purpose creases that form the folding portion 24.

[0023] The long flaps 21 are folded in a mountain shape relative to the front wall 13 and the rear wall 14, respectively, and the short flaps 22 are folded in a mountain shape relative to the left side wall 15 and the side wall main body 16, respectively, and the attachment portions 21a are folded in a valley shape relative to the long flaps 21. Next, the rear wall 14 is mountain folded relative to the left side wall 15, and the side wall main body 16 is mountain folded relative to the front wall 13. Then, the overlapping side wall main body 16 and the attachment margin 17, and the attachment portions 21a and the short flaps 22 are attached with an adhesive (for example, hot melt).

[0024] The above-mentioned folding and adhering steps form a continuous cylindrical outer wall 12 consisting of the front wall 13, the rear wall 14, and the pair of side walls 15. In addition, by expanding the outer wall 12 into a rectangular tube, the long flaps 21 rotate relative to the front wall 13 and the rear wall 14, and the short flaps 22 rotate relative to the pair of side walls 15, so that the bottom of the outer wall 12 is closed by the bottom wall 20 in one action.

[0025] (Configuration of the pop-up display section) 1 and 2, the POP display section 30 is provided to promote sales of the stored items. The POP display section 30 can be displayed in a state where it protrudes forward from the front wall 13 in either the first open state shown in the lower part of Fig. 1 or the second open state shown in the upper part of Fig. 1.

[0026] The pop display section 30 is provided at the upper part of the center in the width direction within the front wall 13, and is partitioned by a fold line (first fold line) 31 and a pair of break lines (first break lines) 32. The pop display section 30 is further partitioned into a folded-back section 34 and a display main body section 35 by a fold line (second fold line) 33 extending parallel to the fold line 31.

[0027] 2 and 5, the fold line 31 is provided above the lower end of the front wall 13 with a gap therebetween, and extends in the width direction along the bottom wall 20. More specifically, the fold line 31 extends parallel to the fold portion 23 (fold line 23a) between the front wall 13 and the bottom wall 20. However, the fold line 31 may be inclined with respect to the bottom wall 20 as long as it extends in the width direction, and may be curved upward or downward as long as the POP display portion 30 can be folded.

[0028] The fold line 31 is mainly formed by a lead crease in which a cut line is provided on a general crease in order to improve the foldability. The fold line 31 includes an insertion hole 31a formed by a convex cut line protruding upward in the middle part in the width direction. An uncut portion that is not cut in an unopened state is secured on the formation track of the insertion hole 31a. No lead crease is formed in the area where the insertion hole 31a is formed. In other words, the fold line 31 is formed by providing an insertion hole 31a formed by a convex cut line in the center of the width direction of the front wall 13 and providing lead creases on both sides of the insertion hole 31a.

[0029] The pair of break lines 32 extend downward from the upper end of the front wall 13 and are connected to the ends of the fold line 31. A V-shaped notch is provided at the upper end of the break line 32. The pair of break lines 32 each extend in the height direction so as to be parallel to the fold portion 18 (fold line 18a), and are connected to the ends of the fold line 31 via a curved portion of a predetermined curvature formed by the cut lines. However, as long as the break line 32 is configured to be connected to the ends of the fold line 31, it may be inclined with respect to the fold portion 18, or may have a curved shape as a whole.

[0030] Each of the pair of break lines 32 is composed of a one-sided zipper. The one-sided zipper is composed of a plurality of first cut lines arranged linearly in the height direction at a breakable interval, and second cut lines that are connected to the upper ends of the respective first cut lines and incline upward as they move outward in the width direction. The breakable interval refers to the distance at which adjacent cut lines can easily connect to each other when broken by the application of an external force.

[0031] The fold line 33 is provided to further divide the pop display section 30, which is divided by the fold line 31 and the pair of break lines 32, into a folded-back section 34 and a display main body section 35. This fold line 33 is mainly composed of a general-purpose crease and extends in the width direction between the pair of break lines 32. The middle part of the fold line 33 in the width direction includes a cut line 33a that protrudes downward to form a concave shape. On the formation path of this cut line 33a, an uncut portion that is not cut in an unopened state is secured. No general-purpose crease is formed in the area where the cut line 33a is formed. In other words, the fold line 33 is formed by providing a concave cut line 33a in the center of the width direction of the pop display section 30 and providing general-purpose creases on both sides of this cut line 33a.

[0032] The folded-back portion 34 is connected to the front wall 13 via the folding line 31. More specifically, the folded-back portion 34 is formed by a portion of the POP display portion 30 that is located between the folding lines 31 and 33. In the POP display state shown in FIG. 1, the folded-back portion 34 is located behind the display main body portion 35 and cannot be seen from the front.

[0033] The display main body 35 is connected to the folded-back portion 34 via the fold line 33. More specifically, the display main body 35 is configured by a portion of the POP display portion 30 that is located between the fold line 33 and the upper edge of the POP display portion 30. This display main body 35 is visible from the front side in the POP display state shown in Fig. 1. The display main body 35 has a leg portion 35a that protrudes downward by a cutting line 33a included in the fold line 33.

[0034] Here, the positions of fold lines 31, 33 formed on front wall 13 will be described. Fold line 31 is provided at a height T1 above the lower end of front wall 13, and fold line 33 is provided at a height T2 above fold line 31. Height T1 of fold line 31 is defined as the position of the lead crease that constitutes fold line 31, and height T2 of fold line 33 is defined as the position of the general crease that constitutes fold line 33.

[0035] Height T1 from the bottom end of front wall 13 to fold line 31 corresponds to the height of the portion that remains as front wall 13 due to rupture of POP display portion 30 along rupture line 32 relative to front wall 13. Height T2 between fold lines 31 and 33 corresponds to the height of folded-back portion 34 in the sealed state shown in Fig. 2. Height T3 between fold line 33 and the top edge of front wall 13 corresponds to the height of display main body portion 35 in the sealed state shown in Fig. 2.

[0036] The height T1 of the folding line 31 is set at a position lower than the height T2 of the folded-back portion 34 and the height T3 of the display main body portion 35. More specifically, the height T1 of the folding line 31 is set at a position less than 1 / 3 of the total height of the front wall 13, and in this embodiment, it is set at a position 1 / 4 of the total height of the front wall 13. This allows the lower end of the display main body portion 35 to abut on the display stand and be tilted in the POP display state shown in FIG.

[0037] In this embodiment, the height T2 of the folded-back portion 34 and the height T3 of the display main body portion 35 are set to be approximately the same (T2 ≈ T3), and the pop display portion 30 is folded flat as a whole in the pop display state shown in FIG. 1. However, the height T2 of the folded-back portion 34 and the height T3 of the display main body portion 35 may be set to be different within a specified range. Specifically, when the height T3 of the display main body portion 35 is set higher than the height T2 of the folded-back portion 34, in the pop display state shown in FIG. 1, the display main body portion 35 curves forward, while the folded-back portion 34 curves backward or extends flat. On the other hand, when the height T3 of the display main body portion 35 is set lower than the height T2 of the folded-back portion 34, in the pop display state shown in FIG. 1, the display main body portion 35 curves forward or extends flat, while the folded-back portion 34 curves backward. Curving the display main body 35 forward can improve the design, while flattening the display main body 35 allows the printed advertisement to be clearly seen. However, if the difference between the height T3 of the display main body 35 and the height T2 of the folded-back portion 34 is excessively large, the curvature of the display main body 35 becomes too large, making it difficult to see the advertisement. For this reason, assuming that the sum of the height T2 of the folded-back portion 34 and the height T of the display main body 35 is 100%, it is preferable to set the height T3 of the display main body 35 in the range of 40% to 60%, and in this embodiment it is set to 50%.

[0038] 1, 5, and 7, an insertion piece 36 is connected to the display main body 35 for maintaining the POP display unit 30 in a display state by being inserted into an insertion hole 31a included in the folding line 18a. The insertion piece 36 is connected to the display main body 35 via a movable piece 37 to ensure ease of insertion into the insertion hole 31a.

[0039] The insertion piece 36 is connected to the upper end of the movable piece 37 via a bent portion 38. Referring to Fig. 5, the width of the insertion piece 36 is approximately the same as the width of the insertion hole 31a, and is set to approximately 1 / 3 the width dimension of the display main body 35 and approximately 1 / 4 the width dimension of the front wall 13. The fold line 38a constituting the bent portion 38 is provided at the same height as the upper end (tip) of the display main body 35, and is composed of a convex cutting line provided in the center in the width direction and a pair of general-purpose lines provided on both sides of the cutting line.

[0040] The movable piece 37 is provided within the display main body 35 by slits 39a consisting of a pair of cutting lines provided linearly along both side edges of the insertion piece 36 and a fold line 39b provided between the lower ends of the pair of slits 39a. The fold line 39b is formed by a general-purpose ruled line, and the movable piece 37 is connected to the display main body 35 via this fold line 39b.

[0041] When the paper container 10 in the sealed state shown in Fig. 2 is to be put into the first open state shown in the lower part of Fig. 1, first, the insertion piece 36 is pulled out from the lock hole 44, which will be described in detail later. Next, the display main body 35 constituting the POP display part 30 is grasped and pulled downward toward the front side, so that the POP display part 30 is broken along the breaking line 32 relative to the front wall 13, and the folded-back part is valley-folded along the fold line 31, as shown in Fig. 6.

[0042] 7, the display main body 35 is folded along the folding line 33 with respect to the folding back portion 34, and then the movable piece 37 is rotated forward to insert the insertion piece 36 into the insertion hole 31a. This allows the first open state to be achieved in which only a portion of the front wall 13 is opened, as shown in the lower part of FIG.

[0043] (Cover wall configuration) 2 and 8, the cover wall 40 is provided to openably close the upper end opening of the outer peripheral wall 12. In the sealed state shown in FIG. 2, the cover wall 40 has a rectangular shape extending along the XY plane with approximately the same dimensions as the bottom wall 20, and is disposed above the bottom wall 20 with a gap therebetween. The cover wall 40 is connected to the upper edge of the rear wall 14 facing the POP display section 30 via a bent portion 41. Referring to FIG. 4, the cover wall 40 is connected to the upper edge of the rear wall 14 via a fold curve 41a consisting of a general-purpose line that constitutes the bent portion 41.

[0044] 2 and 8, the front edge of the cover wall 40 is connected to the cover insert piece 42 via a bent portion 43. The cover insert piece 42 is inserted so as to overlap the inside of the front wall 13, and is provided to prevent the cover wall 40 from opening the upper end opening of the outer peripheral wall 12 due to the repulsive force. The protruding dimension, which is the height of the cover insert piece 42, is set to be larger than the height dimension of the movable piece 37. That is, in the sealed state shown in FIG. 2, the lower edge of the cover insert piece 42 is located below the lower end of the movable piece 37. Referring to FIG. 4, the cover insert piece 42 is connected to the upper edge of the cover wall 40 via a fold curve 43a consisting of a general-purpose crease that constitutes the bent portion 43.

[0045] 2, 4, and 8, the lid insertion piece 42 is provided with a lock hole 44 into which the insertion piece 36 can be inserted when the lid insertion piece 42 is in the sealed state shown in Fig. 2, that is, when the folded-back portion 34 and the display main body portion 35 are not folded. The width of the lock hole 44 is approximately the same as the width of the insertion piece 36.

[0046] In this embodiment, the lock hole 44 is provided on the bent portion 43. The lock hole 44 is formed by a convex cut line protruding from the cover wall 40 toward the cover insertion piece 42. The bent portion 43 is not formed in the area where the lock hole 44 is formed. In other words, the bent portion 42 (bending line 43a) is formed by providing the convex lock hole 44 in the center in the width direction between the cover wall 40 and the cover insertion piece 36 and providing general-purpose lines on both sides of the lock hole 44. In addition, a semicircular punched operation hole 44a is provided on the cover wall 40 side of the lock hole 44 to pull out the insertion piece 36 inserted into the lock hole 44, as shown in FIG. 2.

[0047] 6 to 8, the lid insertion piece 42 is provided with a pair of slits 42a for engaging both upper portions of the front wall 13 in the first open state shown in the lower part of FIG. 1 and FIG. 7. The pair of slits 42a correspond to a pair of break lines 32 that divide the pop display section 30, and are inclined so as to intersect with each other. More specifically, in a state in which the lid insertion piece 42 is inserted inside the front wall 13, the lower end 42b of the slit 42a is located outside the break line 32 in the width direction, and the upper end 42c of the slit 42a is located inside the break line 32 in the width direction. This allows the edge of the slit 42a to be engaged with the break edge of the break line 32 in the first open state of the front wall 13 shown in FIG. The lower end 42b of the slit 42a is disposed at a breakable interval from the lower end edge of the lid insertion piece 42, and the upper end 42c of the slit 42a is disposed at a distance from the bent portion 43.

[0048] 2 and 8, inner flaps 45 that support the lower surface of the cover wall 40 in the sealed state shown in Fig. 2 are connected to the upper edges of the pair of side walls 15 via folding portions 46 (folding lines 46a). Referring to Fig. 4, the inner flaps 45 are connected to the upper edges of the left side wall 15 and the side wall main body 16 via the folding lines 46a that are general-purpose lines that form the folding portions 46.

[0049] In the state before sealing shown in Fig. 8, the inner flaps 45 are each mountain-folded relative to the side walls 15, and then the cover wall 40 is mountain-folded relative to the rear wall 14, and the cover insertion piece 36 is mountain-folded relative to the cover wall 40. Next, as shown in Fig. 2, the cover insertion piece 36 is inserted inside the front wall 13, and then the movable piece 37 is rotated forward to insert the insertion piece 36 in correspondence with the lock hole 44. This makes it impossible for the cover insertion piece 36 to move relative to the front wall 13 even if a force acts on the cover insertion piece 36 to pull it out from inside the front wall 13. In other words, the cover wall 40 can be put into a locked state in which it cannot be opened unless the insertion piece 36 is intentionally pulled out from the lock hole 44.

[0050] On the other hand, when the insertion piece 36 is pulled out of the lock hole 44 to set the first open state shown in the lower part of Fig. 1 and Fig. 7, the upper portions on both sides of the front wall 13 are bent forward due to the repulsive force of the lid insertion piece 36. In response to this, the lid insertion piece 36 is provided with slits 42a corresponding to the fracture line 32, and by pulling the lid insertion piece 36 forward between the pair of slits 42a, the edge of the slits 42a can be engaged with the fracture edge caused by the fracture line 32. This prevents the upper portions on both sides of the front wall 13 from bending, and keeps the lid wall 40 in the closed state.

[0051] (Break line configuration) 1 to 3, the break line 50 is provided to separate the outer peripheral wall 12 into the bottom wall 20 side and the cover wall 40 side. The break line 50 extends from the front wall 13 through each of the pair of side walls 15 to the rear wall 14. More specifically, the break line 50 is composed of a front break portion 51 provided in the front wall 13, a pair of side break portions 52 provided in each of the pair of side walls 15, and a rear break portion 53 provided in the rear wall 14.

[0052] 2 and 4, the front break portion 51 is provided below half of the total height with respect to the front wall 13 and extends in the width direction with a gap from the lower end of the front wall 13. In this embodiment, the front break portion 51 extends outward in the width direction from each of the pair of break lines 32. However, the front break portion 51 may be provided so as to be located on a straight line with respect to the fold line 31, and the formation position thereof can be changed as necessary.

[0053] Each front breakable portion 51 is composed of a linearly extending cut line and a one-sided zipper provided at a breakable interval from the cut line. A second cut line constituting the one-sided zipper continues to the end on the pop display portion 30 side and is inclined widthwise inward as it moves downward. The inner end of the front breakable portion 51 in the width direction is disposed at a breakable interval from the break line 32. The outer end of the front breakable portion 51 in the width direction is disposed at a breakable interval from the fold portion 18 (fold line 18a).

[0054] 2 to 4, the side breakable portions 52 are provided from the front end to the rear end of each of the pair of side walls 15, and are generally inclined upward from the vicinity of the front breakable portion 51 toward the rear. The front end of the side breakable portion 52 on the front wall 13 side is disposed at a breakable distance from the outer end of the front breakable portion 51 on the outer side in the width direction. The rear end of the side breakable portion 52 on the rear wall 14 side is disposed above half of the side wall 15.

[0055] The side breaking portion 52 is constituted by a one-sided zipper provided along a determined breaking trajectory. The second cutting line constituting the one-sided zipper is connected to the end on the front wall 13 side and inclines forward as it goes downward. As described above, the right side wall 15 of the pair of side walls 15 is constituted by the side wall main body 16 and the attachment margin 17, so that the one-sided zipper is provided in the side wall main body 16 constituting the right side wall 15, and the attachment margin 17 is provided with the notch 52a and the linear half-cut line 52b.

[0056] 3 and 4, the rear break portion 53 is provided between the rear ends of the pair of side break portions 52. Both ends of the rear break portion 53 are arranged at a breakable interval from the rear ends of the pair of side break portions 52. This rear break portion 53 is arranged above half of the total height with respect to the rear wall 14 and extends linearly in the width direction. However, the rear break portion 53 may be inclined or curved with respect to the upper end (bending portion 41) of the rear wall 14 as long as it is arranged at a breakable interval from the rear ends of the pair of side break portions 52. The rear break portion 53 may also be formed at the upper end (bending portion 41) of the rear wall 14.

[0057] The rear breakable portion 53 is composed of a pair of one-sided zippers 53a, 53b. More specifically, the one-sided zipper 53a is located to the left of the widthwise center on the rear wall 14, and the second one-sided zipper 53b is located to the right of the widthwise center. The one-sided zippers 53a, 53b differ in the positions where the second cutting lines connect to the first cutting lines, and both second cutting lines connect to the widthwise outer ends of the first cutting lines and are inclined outward in the widthwise direction as they extend downward.

[0058] 1 to 3, a pair of side walls 15 are provided with stopper pieces 55 for preventing internal articles from falling forward in a second open state in which the lid wall 40 side is separated as in the upper paper container 10 in FIG. 1. More specifically, two stopper pieces 55 are provided on the left side wall 15 rearward of the center in the front-rear direction, and two stopper pieces 55 are provided on the right side wall 15 forward of the center in the front-rear direction. In other words, the positions in the front-rear direction at which the stopper pieces 55 are formed are all different. In this embodiment, a total of four stopper pieces 55 are provided on the left and right side walls 15 so as to be positioned at equal intervals.

[0059] 4, the stopper piece 55 is provided in the side wall 15 by being partitioned by a first cutting line 56, a total of four second cutting lines 57, and two fold lines 58. The first cutting line 56 extends in the height direction. The second cutting lines 57 extend from the top and bottom ends of the first cutting line 56 to the front and rear, respectively. These cutting lines 57, 58 have uncut portions that are not cut in an unopened state. The fold lines 58 are general-purpose lines extending in the height direction, and are provided between the front ends of a pair of second cutting lines 57 extending forward from the first cutting line 56, and between the rear ends of a pair of second cutting lines 57 extending rearward from the first cutting line 56.

[0060] When opening the paper container 10 into a tray-like state as shown in the upper part of Fig. 1, in the first opened state shown in Fig. 6 or 7, the breaking edges of the front wall 13 by the pair of breaking lines 32 are grasped, and the remaining part of the front wall 13 is broken along the front breaking portion 51. Next, the ridges of the front wall 13 and the side walls 15 are grasped above the front breaking portion 51, and the pair of side walls 15 are broken along the side breaking portions 52 by operating upward and backward. Finally, the rear wall 14 is broken along the rear breaking portion 53. This allows the lid wall 40 side of the outer peripheral wall 12 to be removed, and the paper container 10 can be brought into a tray-like second opened state as shown in the upper part of Fig. 1.

[0061] When some of the articles are removed in this second open state, the stopper pieces 55 are pushed inward and positioned between the adjacent articles. This causes the remaining articles contained in the paper container 10 to come into contact with the stopper pieces 55, preventing them from falling forward.

[0062] The paper container 10 constructed in this manner has the following features.

[0063] After the pop display section 30 is broken along the break line 32 with respect to the front wall 13, the folded-back section 34 and the display main body section 35 are folded along the fold lines 31 and 33, respectively. Then, the pop display section 30 can be brought into a display state by inserting the insertion piece 36 connected to the display main body section 35 into the insertion hole 31a included in the fold line 31. Meanwhile, the insertion piece 36 can be inserted into the lock hole 44 provided in the lid insertion piece 42 provided on the lid wall 40 when the folded-back section 34 and the display main body section 35 are in a non-folded state. This allows the lid wall 40 to be locked so that it is not easily opened in the sealed state, thereby improving the sealing strength of the paper container 10. In this way, the insertion piece 36 has both a function for maintaining the pop display section 30 in a display state and a locking function for maintaining the lid wall 40 in a sealed state. Therefore, the pop display section 30 can be displayed and the cover wall 40 can be locked without complicating the structure of the lines and break lines on the paper container 10.

[0064] The lid insert piece 42 is provided with a pair of slits 42a that cross the pair of break lines 32. With this, in a state where the pop display portion 30 is broken along the break lines 32 with respect to the front wall 13, the portion of the lid insert piece 42 located between the pair of slits 42a is bent forward, so that the edge of the slits 42a can be engaged with the break edge of the break line 32. Therefore, by bending the upper portions of both sides of the front wall 13 from which the pop display portion 30 is broken, the frictional resistance between the lid insert piece 42 is reduced, and the lid wall 40 can be prevented from floating up due to the repulsive force. In other words, the lid wall 40 can be maintained in a closed state by the engagement of the upper portion of the front wall 13 with the slits 42a. Therefore, the paper container 10 that has been opened and is in a pop display state can be easily handled, and the appearance can be prevented from being damaged.

[0065] The outer peripheral wall 12 is provided with a break line 50 for separating the outer peripheral wall 12 into the bottom wall 20 side and the lid wall 40 side. This allows the paper container 10 to be in not only a first open state in which only a portion of the front wall 13 is opened, but also a second open state in which the lid wall 40 side is separated. Therefore, the paper container 10 can be used to display items in an optimal manner depending on the space.

[0066] The height T1 from the bottom end of the front wall 13 to the fold line 31 is lower than the height T2 of the folded-back portion 34 and the height T3 of the display main body portion 35. As a result, when the opened paper container 10 is placed on a display stand, the POP display portion 30 abuts against the display stand and is in an inclined POP display state, making it easier for consumers to view the contents of the advertising display from above. In addition, the display main body portion 35 is formed with legs 35a that protrude downward by a concave cutting line 33a included in the fold line 33. As a result, in the display state of the POP display portion 30, the lower end edge of the legs 35a abuts against the display stand, improving stability.

[0067] Other embodiments and various modifications of the present invention will be described below, but in these descriptions, points that are not particularly mentioned are the same as those in the first embodiment. In the drawings referred to below, the same elements as those in the first embodiment are given the same reference numerals.

[0068] Second embodiment 9, the paper container 10 of the second embodiment differs from the paper container 10 of the first embodiment in that the folded-back portion 34 and the display main body portion 35 are connected via a continuous portion 60, and the pop display portion 30 is formed into a triangular prism shape. The continuous portion 60 is formed by providing a pair of fold lines 33 extending in the width direction with a gap in the height direction on both sides of the concave cutting line 33a. The paper container 10 of the second embodiment thus configured can obtain the same actions and effects as the paper container 10 of the first embodiment.

[0069] Third embodiment 10, the paper container 10 of the third embodiment differs from the paper container 10 of the first embodiment in that the width of the front wall 13 including the pop display section 30 is 1.5 times the width of the rear wall 14 including the lid wall 40 and the lid insertion piece 42, and two insertion holes 31a, two insertion pieces 36 including the movable part 37, and two lock holes 44 are provided. However, the width of the front wall 13 including the pop display section 30 and the width of the rear wall 14 including the lid wall 40 and the lid insertion piece 42 are not limited to 1.5 times and can be changed as necessary. In addition, the number of the insertion holes 31a, the insertion pieces 36 including the movable part 37, and the lock holes 44 can be changed according to the width of the front wall 13 including the pop display section 30 and the width of the rear wall 14 including the lid wall 40 and the lid insertion piece 42. The paper container 10 of the second embodiment thus constructed can obtain the same functions and effects as the paper container 10 of the first embodiment, and can further improve the stability of the display state of the pop display section 30 and the sealing strength for maintaining the lid wall 40 in a sealed state.

[0070] (Fourth embodiment) 11 and 12, the paper container 10 of the fourth embodiment differs from the paper container 10 of the first embodiment in that the configuration of the bottom wall 20 is changed. Specifically, the bottom walls 20 of the fourth embodiment are of an interlocking type, and each of the bottom walls 20 includes a pair of long flaps 21 and end flaps 22, similar to the first embodiment.

[0071] The pair of long flaps 21 are formed with a dimension such that their tip portions overlap each other. The first long flap 21 connected to the front wall 13 is formed in a rectangular shape, and a notch 21c is provided at the center of the tip. The second long flap 21 connected to the rear wall 14 is formed in a roughly trapezoidal shape with a tip portion of a width that can be inserted through the notch 21c. The pair of short flaps 22 are provided with notches 22a for exposing the notches 21c of the first long flap 21.

[0072] After folding the first long flap 21 against the front wall 13, the pair of short flaps 22 are each folded against the pair of side walls 15. Thereafter, the second long flap 21 is folded against the rear wall 14, and the tip of the second long flap 21 is placed inside the first long flap 21 through the notch 21c of the first long flap 21 exposed by the notch 22a. This allows the bottom wall 20 to be kept closed simply by the engagement of the flaps 21 and 22.

[0073] Fifth embodiment 13, the paper container 10 of the fifth embodiment differs from the first embodiment in that the bottom wall 20 is configured by a pair of rectangular long flaps 21 and short flaps 22. In this paper container 10, the pair of inner flaps 22 are folded against the pair of side walls 15, the long flaps 21 are folded against the front wall 13 and the rear wall 14, and the butted tip portions of the pair of long flaps 21 are fixed with a fixing means such as tape, thereby forming the bottom wall 20 and closing the bottom of the outer peripheral wall 12.

[0074] In the paper container 10 of the fourth and fifth embodiments, the bottom cannot be automatically closed simply by expanding the outer wall 12 into a square tube, but with regard to the pop display by the pop display section 30 and the locking of the lid wall 40 by the insertion piece 36, the same action and effect as in the first embodiment can be obtained.

[0075] The present invention is not limited to the configurations of the above-described embodiments, and various modifications are possible.

[0076] For example, in the paper containers 10 of the fourth and fifth embodiments, the folded-back portion 34 and the display main body portion 35 may be connected via a continuous portion 60 as in the second embodiment, or two insertion holes 31a, two insertion pieces 36 including movable portions 37, and two locking holes 44 may be provided as in the third embodiment.

[0077] The slits 42a of the lid insertion pieces 42 that engage with the upper portions on both sides of the front wall 13 in the first open state shown in the lower part of FIG. 1 may not be provided.

[0078] The break line 50 for separating the outer peripheral wall 12 into the bottom wall 20 side and the cover wall 40 side does not necessarily have to be provided.

[0079] A height T1 from the lower end of the front wall 13 to the folding line 31 may be greater than a height T2 of the folded-back portion 34 and a height T3 of the display main body portion 35.

[0080] The side wall 15 does not necessarily need to be provided with the stopper piece 55 .

[0081] The fold lines 31, 33 may be configured as any of general-purpose creases, lead creases, and half-cut lines, and may be changed as necessary as long as they are configured to be bent along a predetermined portion. The break lines 32, 50 may be perforation lines with multiple break lines spaced at breakable intervals, or a Y-zipper configured with multiple Y-shaped break lines, and may be changed as necessary as long as they are configured to be breakable along a specified break trajectory. [Explanation of symbols]

[0082] 10 Paper containers 12 Peripheral wall 13 Front wall 14 Back wall 15 Side wall 16 Side wall body 17. Fee 18 Bend section 18a folding line 20 Bottom Wall 21 Long flap 21a Adhesive part 21b Folding line 21c Notch 22 Short flap 22a Notch 23 Bend section 23a folding line 24 Bend section 24a folding line 30 Pop display section 31 Folding line (1st folding line) 31a insertion hole 32 Break line (first break line) 33 Folding line (second folding line) 33a cutting line 34 Turning section 35 Display main unit 35a Legs 36 Insert 37 Movable piece 38 Bend section 38a folding line 39a Gap 39b folding line 40 Lid wall 41 Bend section 41a folding line 42 Lid insertion piece 42a Slit 42b Bottom end 42c top end 43 Bend section 43a folding line 44 Lock hole 44a operation hole 45 Inner flap 46 Bend section 46a folding line 50 Break line (second break line) 51 Front break 52 Side break 52a Notch 52b Half cut wire 53 Rear fracture part 53a, 53b Single zipper 55 Stopper piece 56 1st cutting line 57 Second cutting line 58 Folding line 60 Continuous section T1 Height from the bottom edge of the front wall to the first fold line T2 Height of folded part T3 Display body height

Claims

1. a cylindrical outer peripheral wall including a front wall, a pair of side walls connected to both sides of the front wall in a width direction, and a rear wall connected to the pair of side walls; A bottom wall that closes the bottom of the outer peripheral wall; A pop display unit for displaying advertisements provided in the front wall; A paper container comprising: The pop display portion is divided by a first fold line extending along the bottom wall and a pair of first break lines extending downward from the upper edge of the front wall and connected to both ends of the first fold line, and is further divided by a second fold line extending along the first fold line into a folded portion located between the first fold line and the second fold line, and a display main body portion connected to the folded portion via the second fold line, The first fold line includes an insertion hole in a middle portion in the width direction, An insertion piece that can be inserted into the insertion hole by folding the folding portion and the display main body along the first folding line and the second folding line is provided continuously on the display main body, a cover wall that closes an upper end opening of the outer peripheral wall is connected to an upper end edge of the rear wall that faces the pop display portion, A lid insertion piece is provided at the front end of the lid wall to be inserted into the inside of the front wall, The paper container has a lock hole in the lid insertion piece, into which the insertion piece can be inserted when the folded portion and the display main body portion are in an unfolded state.

2. The cover insertion piece has a pair of slits that correspond to the pair of first break lines, The paper container according to claim 1, wherein the slit has a lower end located on the widthwise outer side of the first break line and an upper end located on the widthwise inner side of the first break line, and intersects with the first break line.

3. The paper container according to claim 1 or 2, wherein the outer peripheral wall has a second break line extending from the front wall through each of the pair of side walls to the rear wall, for separating the outer peripheral wall into the bottom wall side and the lid wall side.

4. A height from a lower end of the front wall to the first fold line is lower than a height of the folded-back portion and a height of the display main body portion, The second fold line includes a concave cut line in the middle portion in the width direction, The paper container according to claim 1 or 2, wherein the cutting line forms a leg portion protruding downward on the display main body.

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