Packaging box and sheet material

Abstract

To provide a packaging box in which a side opening surface is formed on a side surface and the strength of a side plate can be ensured when the opening surface is opened and closed by a lateral lid flap.SOLUTION: In a packaging box 101 comprising a first pair of side plates 2 and 9 facing each other, a second pair of side plates 5 and 7 facing each other, a top plate 8 closing an upper opening surface, and a bottom plate 1 closing a lower opening surface, an inscribed folding flap 4 folded from a lateral edge of one first side plate and inscribed in one second side plate is provided continuously to the lateral edge, and holding means 21 and 22 are provided for holding the inscribed contact of the inscribed folding flap 4 with the one second side plate 7.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a packaging box and a sheet material.

Background Art

[0002] Conventionally, a packaging box has been known that includes a pair of opposing first side plates, a pair of opposing second side plates, an upper plate that closes an upper opening surface, and a bottom plate that closes a lower opening surface. For example, Patent Document 1 discloses the following packaging box. That is, an upper lid flap and a bottom lid flap are continuously provided on the upper edge of one side plate and the lower edge of the other side plate for the upper and lower opening surfaces of the box body formed by the opposing side plates and the opposing end plates of this packaging box. On the other hand, an inner connecting plate substantially the same shape as the side plate is continuously provided on the opposite edge of each side plate, and this is internally connected to the side plate to make the box strength well-balanced.

Summary of the Invention

Problems to be Solved by the Invention

[0003] However, not only the upper opening surface but also a side surface opening surface is formed on the side surface, and when this opening surface is opened and closed by a side lid flap, for example, ensuring the strength of the side plate has not been considered.

Means for Solving the Problems

[0004] In order to solve the above-described problems, the present invention provides a packaging box including a pair of opposing first side plates, a pair of opposing second side plates, an upper plate that closes an upper opening surface, and a bottom plate that closes a lower opening surface, An inner connecting folding flap that is folded from the lateral edge of one first side plate and internally connected to one second side plate is continuously provided on the lateral edge, and holding means for holding the internal connection of the inner connecting folding flap to the one second side plate is provided , the upper plate can open and close the upper opening surface, and the other first side plate, which is on the tip side of the inner folding flap, is a horizontal cover flap that can open and close the side surface opening surface, and the tip of the inner folding flap is located at a position where it can be visually observed from the outside through the side surface opening surface which is characterized by the above.

Effects of the Invention

[0005] According to the present invention, when a side surface opening surface is formed on the side surface and this opening surface is opened and closed by a horizontal cover flap, the strength of the side plate can be ensured.

Brief Description of the Drawings

[0006]

Figure 1

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Modes for Carrying Out the Invention

[0007] [First Embodiment] An embodiment in which the present invention is applied to a packaging box having an opening for inserting contents and an opening for taking out contents different from this opening will be described. First, a general method of using such a packaging box will be described.

[0008] Fig. 9(a) shows a state where four such packaging boxes are arranged side by side in the short direction, with the upper opening surface, which is the largest surface of the box, being the surface for taking out the contents when opening, and the openable upper plate 8 being open. Fig. 9(b) shows a state where four such packaging boxes are arranged side by side in the short direction, with the front opening surface, which is the smallest surface of the box, being the surface for inserting when accommodating the contents, and the openable front end plate being open. When continuously inserting the contents into a plurality of packaging boxes in the state of Fig. 9(a), due to the rising part of the opening / closing part on the largest surface of the box, the distance for moving the contents to the opening becomes long, making it difficult to put the contents in. In contrast, in Fig. 9(b), this distance is relatively short and the working efficiency is good. However, in the act of taking out the contents from the packaging box, since it can be opened in a state where the whole of the contents can be confirmed, it is desirable to use the largest surface as the taking-out surface.

[0009] The front end face of the contents on the near side can be seen inside the leftmost box in Fig. 9(b). This content is in a state where an endless belt is wound with the internal space narrowed so as to disappear. As shown in Fig. 9(c), when storing, the packaging box is made vertically long and stood up so that the deformation of the belt is less likely to occur. Such a vertically long packaging box is arranged side by side as shown in Fig. 9(b) during the accommodation operation. Note that the right side of Fig. 9(c) shows a conventional general vertically long packaging box.

[0010] FIG. 1 is an explanatory view of a packaging box according to an embodiment of the present invention. FIG. 1(a) is a developed view of a blank plate 110 made of, for example, cardboard of the packaging box 101, and FIG. 1(b) is a perspective view of the packaging box 101. The basic configuration of the packaging box 101 according to the first embodiment includes a pair of opposing first side plates, a pair of opposing second side plates, an upper plate for closing the upper opening surface, and a bottom plate for closing the lower opening surface. The illustrated example has a rectangular parallelepiped shape that is long in the front-rear direction, includes a bottom plate 1 corresponding to the bottom plate, and a front end plate 9 and a rear end plate 2 continuously provided at the front and rear short edges of the bottom plate 1 correspond to the pair of opposing first side plates. Also, in the illustrated example, a left side plate 5 and a right side plate 7 continuously provided at the left and right long edges of the bottom plate 1 correspond to the pair of opposing second side plates. All four edges of the bottom plate 1 in the front, rear, left, and right directions are formed as folded line portions of the continuously provided portions (hereinafter, the folded line portions are also referred to as folds). Note that the names of the respective plate portions in the illustrated example are based on the front-rear, left-right, and up-down directions when the opening surface with a relatively large area provided with an openable lid faces upward and the end face opening surface with a relatively small area provided with an openable lid faces forward.

[0011] Further, the blank plate 110 includes an upper plate 8 continuously provided thereto with the upper right edge of the right side plate 7 as a fold line. The upper plate 8 can open and close the upper opening surface. The front end plate 9 corresponds to a horizontal lid flap that can open and close the front opening surface as a side surface opening surface. The blank plate 110 includes an outer lid flap 10 continuously provided thereto with the front edge of the right side plate 7 as a fold line. The outer lid flap 10 covers the front end plate 9 from the outside.

[0012] Further, the blank plate 110 is provided with an inscribed folding flap 4 which is continuously provided with the right lateral edge of the rear end face plate 2 as a folding line. This inscribed folding flap 4 is folded from the lateral edge of one of the first side plates and continuously provided to the lateral edge, and corresponds to an inscribed folding flap inscribed in one of the second side face plates. The inscribed folding flap 4 is provided with a protrusion 21 protruding downward at the lower edge of a portion from the tip. The bottom plate 1 is provided with a notch hole 22 into which the protrusion 21 is inserted at a location facing the protrusion 21 in the assembled state. The protrusion 21 and the notch hole 22 correspond to a protrusion provided on the upper edge and / or the lower edge of the inscribed folding flap and an insertion hole into which the protrusion formed on the upper plate and / or the lower cover plate is inserted. These constitute holding means for holding the inscription of the inscribed folding flap 4 on one of the second side face plates. Instead of or in addition to the protrusion and the notch hole in the illustrated example, the protrusion 21 may be provided to protrude upward at the upper edge, and the notch hole 22 may be provided at a corresponding location on the upper plate 8.

[0013] The inscribed folding flap 4 is set to a length such that the tip is located at a position easily visible from the outside through the front opening surface with the front end face plate 9 opened. For example, the length of 4 is a length such that the front end face coincides with the front opening surface. In this case of the length, the front end face of the tip of the inscribed folding flap 4 abuts on the inner surface of the front end face plate 9 as a lateral cover flap.

[0014] Further, the blank plate 110 is provided with a folding-back flap 6 which is continuously provided to the upper edge of the left side plate 5, folded back with the upper edge as a fold line, and inscribed in the inner surface of the left side plate 5. The illustrated blank plate 100 is provided with a bellows portion 2a continuously provided to the upper end side of the rear end face plate 2 and an insertion flap 3 connected to the left edge. The blank plate 100 is also provided with a tip protrusion 31 continuously provided to the tip of the folding-back flap 6, a notch hole 32 formed with the bottom plate 1 for inserting the tip protrusion 31, and a bellows portion 33 continuously provided to the tip of the upper plate 8.

[0015] The perspective view of Fig. 1(b) shows a state in which the upper plate 8 is opened and the upper opening surface 205 is opened. This is the state when taking out the contents accommodated in this state. The accommodation of the contents is performed through the front opening surface. This will be described in detail later.

[0016] Figures 2 and 3 are explanatory diagrams of the assembly procedure of the packing box. As shown in Figure 2(a), the part of the rear end panel 2 is raised and bent. As shown in Figure 2(b), the part of the left side panel 5 is raised, and the insertion flap 3 is inserted between the left side panel 5 and the folding-back flap 6, and then the folding-back flap 6 is folded back, and the tip protrusion 31 of the folding-back flap 6 is inserted into the notch hole 32.

[0017] As shown in Figure 2(c), the part of the right side panel 7 is raised, the protrusion 21 of the inner folding flap 4 is inserted into the notch hole 22, and the velcro part 33 attached to the surface of the upper plate 8 is inserted into the notch hole 34 provided between the left side panel 5 and the folding-back flap 6. In the state of Figure 2(c), the contents are accommodated inside the packing box.

[0018] After accommodating the contents, the part of the front end panel 9 is first bent and raised. As a result, it becomes as shown in Figure 3(a). Next, the outer lid flap 10 is folded, and the velcro part 10a at the tip is inserted into the gap between the left side panel 5 and the folding-back flap 6 at the location surrounded by circle A in Figure 3(b). Figure 3(b) is a perspective view from an angle different from that of Figure 3(a). The tip of the velcro part 10a is made a little longer to improve the engagement with the insertion part (to prevent it from coming off), and at the same time, it is made tapered to consider the ease of insertion. Figure 3(d) shows the state where the accommodation is completed.

[0019] The state where the inner lid in Figure 2(c) is folded is the state shown in Figures 3(a) and 3(b). When folding the inner lid, as shown in Figure 3(c), the edge of the inner surface of the inner lid hits the end face of the inner folding flap 4. This collision can prevent it from falling further inward. In Figure 3(c), the upper lid is opened to show the collision position for easy viewing of the abutting relationship. Figure 3(d) is the completed drawing.

[0020] FIG. 13 is an explanatory view of a packaging box according to a comparative example. FIG. 13(a) is a developed view of the blank plate 110 of the packaging box 105, and FIG. 13(b) is a perspective view showing a state where the mouth is opened for inserting a product. As shown in FIG. 13(b), the length of the inner folding flap 4 is short, and the end face on the insertion port side of the inner folding flap 4 is recessed and difficult to see. That is, it is not easy to visually confirm the tip of the inner folding flap 4. This is because the tip of the inner folding flap 4 is not located at a position where it can be easily seen from the opening of the packaging box. For this reason, the tip cannot be seen without looking in.

[0021] FIG. 13(c) is an explanatory view of the problem. As shown in FIG. 13(c), when inserting a roll-like stored item (contents), there is a risk of it hitting and damaging the end face of the inner folding flap 4 that takes a position biased toward the center side. In FIG. 13(c), the upper plate 8 that is normally closed is shown opened. Such a problem also occurs when the length of the inner folding flap 4 is set relatively long as shown in FIG. 13(d), if the end face of the inner folding flap 4 takes a position from the center.

[0022] In contrast, for the packaging box 101 of Embodiment 1, the protrusion 21 of the inner folding flap 4 is inserted into the notch hole 22 to hold the inner connection of the inner folding flap 4 with respect to the right side plate 7 of the inner folding flap 4. Therefore, the tip of the inner folding flap 4 does not take a position from the center, and the occurrence of the above problem can be prevented. Even if the inner folding flap 4 is brought into close contact with the inner wall surface, a step difference corresponding to the thickness of the cardboard occurs, and there is a risk that the contents will collide with the tip of the inner folding flap 4 and damage the contents. Therefore, when inserting the contents into the box, the tip of the inner folding flap 4 is extended to a position visible from the smallest opening so as not to come into contact with the inner folding flap 4, thereby arranging to avoid interference with the contents. As a result, damage to the contents caused by contact with the inner folding flap 4 is prevented.

[0023] 〔Second Embodiment〕 FIG. 4 is an explanatory diagram of the packaging box 102 according to the second embodiment, which is another embodiment of the present invention. The difference from the packaging box 101 of the first embodiment is that the shape of the tip 4a of the inner-inserted folding flap 4 is a tapered shape, and the tip 42a of the bellows part 42 of the front end panel 11, which is the horizontal lid flap of the front end face opening surface that is the insertion port, is made into a tapered shape so as to correspond to this taper. That is, the horizontal lid flap is provided with a bellows part 42 as a folding part that is inscribed in the right side plate 7, which is one of the second side plates, when the upper opening surface 205 as the side surface opening surface is closed. The tip 4a of the inner-inserted folding flap 4 and the tip 42a of the bellows part 42 are tapered shapes facing each other.

[0024] The sealing structure of the lid part of the insertion port is also different from that of the first embodiment. In the example of FIG. 4, bellows parts 41, 11a, and 42 are provided on three sides other than the folding part with the bottom plate 1 of the front end panel 11, which is the lid part. By folding back the bellows parts, the bellows parts enter the inside of the insertion port, and their surfaces come into contact with the inner surface of the side wall to form a contact area. Inner-inserted folding flaps 4 exist on all four sides of the front end panel 11. One is a folding part extending along the side wall part, and the other three sides are folding parts connected to the bellows parts that form a contact area with the inner surface of the side wall. As a result, as shown by the broken line for all four sides of the front end panel 11 shown on the right side of FIG. 4(a), folding parts are formed on all four sides, making it difficult for gaps to occur. Note that the sealing structure of the lid part of the insertion port is the same as that of the packaging box in the comparative example of FIG. 13. The folding parts formed on all four sides of the front end panel 11 are shown by broken lines on the right side of FIG. 13(a).

[0025] And also in the packaging box 102 of this second embodiment, the inner-inserted folding flap 4 extends to the vicinity of the insertion port so that the end face of the inner-inserted folding flap 4 is easily visible from the insertion port. The tip 4a of the inner-inserted folding flap 4 and the bellows part 42 are each made into a tapered shape so that they do not overlap in the thickness direction. If the end faces of the tapers abut against each other, it is possible to prevent the side on the bellows part 42 side of the front end panel 11 from entering inside.

[0026] FIG. 5 is an explanatory diagram of the procedure for assembling the packaging box 102 of the second embodiment. The following procedure is basically the same as the procedure for assembling the packaging box 101 of the first embodiment described with reference to FIGS. 2 to 3. As shown in FIG. 5(a), raise the rear end face plate 2, raise the left side plate 5, and fold back the folding flap 6 by inserting the insertion flap 3 between the left side plate 5 and the folding flap 6. The tip protrusion 31 of the folding flap 6 is inserted into the notch hole 32. Raise the right side plate 7, insert the protrusion 21 of the inner folding flap 4 into the notch hole 22, and insert the velcro part 33 attached to the surface of the upper plate 8 into the notch hole 34 provided between the left side plate 5 and the folding flap 6. In this state, the contents are accommodated in the packaging box.

[0027] As shown in FIG. 5(b), raise the front end face plate 11, and insert the velcro part 41 into the gap (the location of the circle A in the figure) formed between the left side plate 5 and the folding flap 6. FIG. 5(c) is a perspective view seen from a different angle. FIG. 5(d) is the completed view. Note that, similar to the first embodiment, instead of or in addition to the protrusions and notch holes in the illustrated example, the protrusion 21 may be provided so as to protrude upward at the upper edge, and the notch hole 22 may be provided at the corresponding location of the upper plate 8.

[0028] 〔Third Embodiment〕 FIG. 6 is an explanatory diagram of the packaging box 103 according to the third embodiment, which is still another embodiment of the present invention. In the packaging box 103 according to the third embodiment, a taper is not provided at the tip portion 4a of the inner folding flap 4. Along with making it linear instead of having a tapered shape, the velcro part 42 in the range surrounded by the circle B is deleted to avoid overlap in the thickness direction with the inner folding flap 4. When this velcro part 42 is cut and the front end face plate 11 is raised to form a box, a gap is generated in the ridge line portion between the right side of the front end face plate 11 and the front edge of the right side plate 7. For this reason, dust, dirt, light, etc. are likely to enter through the gap. Although such a possibility remains, the inner connection between the inner folding flap 4 and the right side plate 7 can be maintained in the same manner as in the first embodiment and the second embodiment.

[0029] Regarding the right side of the front panel, in the first embodiment shown in FIG. 1, a double structure is adopted, with the front panel 9 as the inner lid and the outer lid flap 10 as the outer lid part, to prevent gaps on the right side. That is, an outer lid flap 10 extending from the right side plate 7 via a folded portion is provided, and a velcro portion 10a is formed at the tip of the outer lid part. By configuring to insert the velcro portion 11a at the tip into the gap between the left side plate 5 and the folding flap 6, a structure is formed where no gap occurs. As shown in the front view of the insertion opening on the right side of FIG. 1(a), a folded portion extending along the right side wall can be formed on the right piece. The left side is a folded portion continuous with the velcro portion. However, in the example of FIG. 1, there is no folded portion on the upper side of the insertion opening, and there is a possibility of a gap occurring.

[0030] 〔Fourth Embodiment〕 FIG. 7 is an explanatory view of the packaging box 104 according to the fourth embodiment. This packaging box 104 is obtained by forming a velcro portion 9a at the tip of the front panel 9 of the packaging box of the first embodiment to also prevent the gap on the upper side. Other points are the same as those of the packaging box 101 of the first embodiment. FIG. 7(a) is a developed view of the blank plate 100, and FIG. 7(b) is a perspective view.

[0031] 〔Comparison between Embodiments〕 FIGS. 8(a) and 8(b) are perspective views showing the packaging box of the first embodiment and the packaging box of the second embodiment arranged side by side so that the periphery of the opening is visible. The packaging box of the first embodiment can be said to be of a type with an inner folding flap 4 having a length arranged at a position visible from the opening and a straight tip. In contrast, the packaging box of the second embodiment can be said to be of a type with an inner folding flap 4 having a length arranged at a position visible from the opening of the packaging box and an inclined tip.

[0032] The packaging boxes of any of the embodiments can be easily confirmed as shown in FIGS. 8(a) and 8(b). This is because the tip of the inner folding flap 4 is at a position visible from the opening of the packaging box and can be easily confirmed. And as can be seen from the comparison around the openings of both, the packaging box of the second embodiment is excellent in that there are few obstacles around the opening. In particular, as shown in FIG. 9(b), for example, four packaging boxes are arranged side by side from the insertion opening, and further, four packaging boxes are stacked on top of each other to form two layers, or four packaging boxes are arranged and stacked to form three layers. When performing the insertion operation of the contents, the fact that there are no obstacles on the left and right opening pieces greatly improves the workability. On the other hand, the visibility of the inner folding flap 4 is excellent in the packaging box of the first embodiment. This is because the tip is linear without being cut, and unlike the tapered shape, all from the upper end to the lower end of the tip surface can be seen.

[0033] FIG. 10 is an explanatory diagram of the length L2 of the inner folding flap 4 in which the tip portion 4a is arranged at a position visible from the opening. When the total length of the packaging box is L1 and the height of the opening is h, if L2 is set to be larger than (L1 - h), it is visible. FIG. 10(a) shows the respective lengths of the packaging box 101 of the first embodiment, FIG. 10(b) shows the packaging box 102 of the second embodiment, and FIG. 10(c) shows the respective lengths of the packaging box 105 of the comparative example (FIG. 13). For the packaging boxes 101 and 102 of the embodiments, L2 is larger than (L1 - h). On the other hand, for the comparative example, L2 is smaller than (L1 - h).

[0034] As shown in FIG. 11, the above size relationship is the relationship between L1, h, and L2 when viewed from an angular direction 45 degrees above the placement surface on which the packaging box is placed.

[0035] FIG. 12 is an explanatory diagram of a modified example. Since either the top surface (the surface of the upper plate 8) or the side surface (the surfaces of the left side plate 5 and the right side plate 7) can be adopted as the surface facing upward when opening the box, this is a modified example for indicating priority for the top surface. In FIG. 12(a), characters ("Open") or symbols (arrows) indicating the surface to be prioritized are provided on the surface of the upper plate 8. It may be by printing or may also be formed by die-cutting. FIG. 12(a) forms a handle portion 33a, and this handle portion 33a induces a posture in which the surface of the upper plate 8 faces upward, which is a posture that is easy to hold by hand. Either one or both of FIG. 12(a) or FIG. 12(b) may be adopted. By these, it is possible to promote opening from the largest surface.

[0036] As described above, in each embodiment, since the holding means holds the inward folding of one of the second side plates of the inward folding flap, it is possible to eliminate the problem caused by the tip position of the inward folding flap being located more centrally. In each embodiment, it is to eliminate the problem caused by the contents hitting the tip of the inward folding flap located more centrally when inserting the contents from the insertion opening, but the problem caused by the tip position of the inward folding flap being located more centrally is not limited to this. Further, the purpose of providing the inward folding flap can also be applied to a packaging box provided with an inward folding flap provided for various purposes such as ensuring strength together with the side plate to be inwardly folded.

Explanation of reference numerals

[0037] 1: Bottom plate 2: Rear end face plate 2a: Adhesive part 3: Insertion flap 4: Inward folding flap 4a: Tip part 5: Left side plate 6: Folding-back flap 7: Right side plate 8: Upper plate 9: Front end face plate 9a: Adhesive part 10: Outer lid flap 10a: Adhesive part 11: Front end face plate 11a: Adhesive part 21: Protrusion 22: Notch hole 31: Tip protrusion 32: Notch hole 33: Bellows part 34: Notch hole 41: Bellows part 42: Bellows part 42a: Tip part 100: Blank plate 101: Packaging box 102: Packaging box 103: Packaging box 104: Packaging box 105: Packaging box 110: Blank plate 205: Upper opening surface

Prior art documents

Patent documents

[0038]

Patent Document 1

Claims

1. In a packing box comprising a pair of opposing first side plates, a pair of opposing second side plates, an upper plate closing an upper opening surface, and a bottom plate closing a lower opening surface, an inscribed folding flap folded from a lateral edge of one of the first side plates and inscribed in one of the second side plates is continuously provided at the lateral edge, holding means for holding the inscription of the inscribed folding flap on the one second side plate is provided, the upper plate is capable of opening and closing the upper opening surface, the other first side plate on the tip side of the inscribed folding flap is a horizontal lid flap capable of opening and closing a side surface opening surface, A packing box, characterized in that the tip of the inscribed folding flap is located at a position visible from the outside through the side surface opening surface.

2. In the packing box according to Claim 1, the horizontal lid flap is provided with a folding portion that is inscribed in the one second side plate when the side surface opening surface is closed, A packing box, characterized in that the tip portion of the inscribed folding flap and the tip portion of the folding portion are in a tapered shape facing each other.

3. In the packing box according to Claim 1, A packing box, characterized in that the tip surface of the tip portion of the inscribed folding flap is located on the side surface opening surface and abuts against the inner surface of the horizontal lid flap.

4. In the packing box according to any one of Claims 1 to 3, the holding means is composed of a protrusion provided on the upper edge and / or the lower edge of the inscribed folding flap, and a insertion hole formed on the upper plate and / or the bottom plate for inserting the protrusion. A packing box characterized by this.

5. In the packing box according to any one of Claims 1 to 4, A packing box, characterized in that an inscribed folding flap folded from the upper edge of the other second side plate facing the one second side plate and inscribed in the other side plate is continuously provided at the upper edge.

6. In the packing box according to any one of Claims 1 to 5, A packing box, characterized in that the pair of first side plates is a pair of end plates.

7. In a sheet material for forming a packing box comprising a pair of opposing first side plates, a pair of opposing second side plates, an upper plate closing an upper opening surface, and a bottom plate closing a lower opening surface, an inscribed folding flap folded from a lateral edge of one of the first side plates and inscribed in one of the second side plates is continuously provided at the lateral edge, holding means for holding the inscription of the inscribed folding flap on the one second side plate is provided, When it is the above-mentioned packaging box, the upper plate can open and close the upper opening surface, and the other first side plate, which is on the tip side of the inner folding flap, becomes a horizontal lid flap that can open and close the side surface opening surface, and the tip of the inner folding flap is positioned at a position where it can be visually observed from the outside through the side surface opening surface. A sheet material characterized by this.

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