JP6136753B2 - Uneven packaging box - Google Patents

Description

  The present invention relates to a packaging box having uneven ruled lines. More specifically, the present invention relates to a packaging box in which a ruled line provided at the boundary between the end plate and the inner flap and a ruled line provided at the boundary between the side plate and the outer flap are formed in steps.

  Conventionally, a packaging box of a type called A type is well known. FIG. 5A shows a development view of a general A-type packaging box 20. As shown in FIG. 5A, the A-type packaging box 20 has a pair of end plates 21 facing each other and a pair of side plates 22 facing each other at the time of assembly. Further, an inner flap 23 is connected to the upper and lower ends of the pair of end plates 21, and an outer flap 24 is connected to the upper and lower ends of the pair of side plates 22. Further, an end ruled line 25 that functions as a fold line is formed at the boundary between the end plate 21 and the inner flap 23, and similarly, a side ruled line 26 that functions as a fold line is formed at the boundary between the side plate 22 and the outer flap 24. Yes. In the A-type packaging box 20, the pair of end plates 21 and the pair of side plates 22 are raised to form a rectangular frame, the inner flap 23 is bent inward, and then the outer flap 24 is moved to the inner flap 23. It is assembled in a substantially rectangular parallelepiped shape by folding it so as to overlap. Desired luggage can be stored in the internal space of the A-type packaging box 20.

  Incidentally, as shown in FIG. 5A, the normal packaging box 20 has end ruled lines 25 and side ruled lines 26 formed in a straight line in the unfolded state. However, if the end ruled lines 25 and the side ruled lines 26 are provided in a straight line, the outer flap 24 is distorted when the packaging box is assembled, as shown in FIG. There arises a problem that the top surface and the bottom surface are not completely flat. This is because, when the packaging box is formed of a thick cardboard sheet or the like, when the outer flap 24 is stacked on the inner flap 23, the outer flap 24 is deformed by the thickness of the cardboard sheet. It is caused by floating. When the top and bottom surfaces of the packaging box 20 are distorted in this way, there are various problems such as difficulty in stacking a plurality of packaging boxes, lowering the strength of the entire packaging box, and poor appearance. Has been.

  As a technique for solving such a problem, for example, a packaging box shown in Patent Document 1 is known. In the packaging box of Patent Document 1, end plates are connected to both sides of the side plate, and outer flaps are connected to the upper and lower ends of the side plate, respectively, and a side ruled line serving as a boundary between the side plate and the outer flap is connected to the center of the side plate. It is supposed to be bent so as to be recessed.

JP 2007-226322 A

  However, although the packaging box disclosed in Patent Document 1 has curved side ruled lines that serve as the boundary between the side plate and the outer flap, if you look closely at the drawings, both ends of the side ruled line that serves as the boundary between the side plate and the outer flap are: It is in the same position as both ends of the end ruled line that becomes the boundary between the end plate and the inner flap. For this reason, when assembling the packaging box, when the inner flap is folded and the outer flap is stacked on top of it, the outer flap is still slightly distorted and the top and bottom surfaces of the packaging box are not completely flat. It is considered impossible.

  For this reason, as a technique for solving such a problem of the conventional invention, the uneven packaging box 30 in which the positions where the end ruled lines 35 and the side ruled lines 36 are formed is shifted in the vertical direction has been developed. FIG. 6A shows a developed view of the uneven packaging box 30. That is, in the uneven packaging box 30, both ends of the end ruled line 35 provided at the boundary between the end plate 31 and the inner flap 33 and both ends of the side ruled line 36 provided at the boundary between the side plate 32 and the outer flap 34 are formed at the same position. Instead, it is assumed to be stepped up and down. As shown in FIG. 6A, in the uneven packaging box 30, the position where the side ruled line 36 is provided is determined from the position where the end ruled line 35 is provided to the outside in the vertical direction in consideration of the thickness of the cardboard sheet or the like. The position is shifted by the distance D. In this way, the positions where the inner flap 33 and the outer flap 34 are formed are shifted by the predetermined distance D. Thus, as shown in FIG. 6B, when assembling the uneven packaging box 30, when the outer flap 34 is stacked on the inner flap 33, the outer flap 34 is distorted due to the influence of the thickness of the cardboard. Can be avoided. As a result, as shown in FIG. 6B, in the uneven packaging box 30, the outer flap 34 can be placed on the inner flap 33 cleanly, and the top and bottom surfaces can be made almost flat. It became.

  However, it has been found that such uneven packaging boxes 30 have low box strength when stacked. Here, in FIG. 7, a perspective view of the uneven packaging box 30 is schematically shown. Moreover, in FIG. 7, the part to which a load is first applied to the uneven packaging box 30 is indicated by a black arrow, and the part to which a load is applied later is indicated by a white arrow. As shown in FIG. 7, when the position where the side ruled line 36 is formed is shifted to the outside in the vertical direction from the position where the end ruled line 35 is formed, the height of the side plate 32 is higher than the height of the end plate 31. Get higher. Then, when a plurality of packaging boxes 30 are stacked, a load is first applied to the side plate 32 having a height, and a load is applied to the lower end plate 31 after the side plate 32. That is, the load is applied to the lower end plate 31 after the side plate 32 is deformed or slightly crushed by the load. As described above, in the uneven packaging box 30, the load is unbalanced with respect to the end plate 31 and the side plate 32. As a result, the uneven packaging box 30 is stacked as compared with the normal packaging box shown in FIG. It was found that the box strength at the time became weak. More specifically, it is considered that the strength of the uneven packaging box 30 is reduced by about 10% compared to a normal packaging box.

  As described above, the uneven packaging box has a disadvantage that the box strength at the time of stacking is lowered, as described above, although the top and bottom surfaces can be made almost flat and good in appearance. For this reason, there is now a need for a multi-level packaging box in which the load of the load is applied in a well-balanced manner and the box strength is enhanced.

  Here, in order to clarify the problem to be solved by the present invention, the structure of the uneven packaging box has been described with reference to FIGS. 6 and 7. However, the above explanation is based on the structure of the uneven packaging box, specifically, the technology in which the end ruled line provided at the boundary between the end plate and the inner flap and the side ruled line provided at the boundary between the side plate and the outer flap are different. However, it is not admitted that it is a known technique at the time of filing this application.

The inventor of the present invention has intensively studied the means for solving the above problems, and as a result, the end ruled line located at the boundary between the end plate and the inner flap and the both end portions of the side ruled line provided at the boundary between the side plate and the outer flap are stepped. At the same time, the center part of the side ruled lines was further shifted inward. That is, since both end portions of the side ruled line are different from the end ruled line, the outer flap can be prevented from being distorted and deformed even if the outer flap is overlapped on the inner flap. In addition, since the center part of the side ruled line is formed at a position shifted inward in the vertical direction from the both end parts, the height of the side plate and the end plate should be substantially uniform at the center part of the side ruled line. Can do. As a result, when the packaging boxes are stacked, the load is applied to the side plate and the end plate in a relatively balanced manner, and as a result, the box strength is enhanced. The inventor has conceived that the problems of the prior art can be solved based on the above knowledge, and has completed the present invention.
More specifically, the present invention has the following configuration.

The present invention relates to an uneven packaging box.
The packaging box of the present invention is a so-called A-type packaging box having two pairs of end plates 1, two pairs of side plates 2, four upper and lower inner flaps 3, and four upper and lower outer flaps. is there. The pair of end plates 1 face each other during assembly. The pair of side plates 2 are connected in the circumferential direction of the pair of end plates 1 and face each other during assembly. The inner flap 3 is connected to the upper and lower ends of each of the pair of end plates 1. The outer flap 4 is connected to the upper and lower ends of each of the pair of side plates 2.
An end ruled line 5 is formed at the boundary between the pair of end plates 1 and the inner flaps 3. A side ruled line 6 is formed at the boundary between the pair of side plates 2 and the outer flaps 4.
Here, each of the side ruled lines 6 is divided into both end portions 6a in the circumferential direction and a central portion 6b located between the both end portions 6a.
Both end portions 6 a are formed at positions shifted by the first distance D on the outer side in the vertical direction from the end ruled line 5.
Further, the central portion 6b is formed at a position shifted by the second distance S on the inner side in the vertical direction from the both end portions 6a.

  As described above, in the present invention, the merit of the uneven packaging box is maintained by shifting the both end portions 6a of the side ruled line 6 to the outside in the vertical direction from the end ruled line 5. That is, the merit of the uneven packaging box is that the outer flap 4 can be prevented from being deformed even when the outer flap 4 is stacked on the inner flap 3 during assembly of the packaging box, and the top and bottom surfaces are made substantially flat. There is in point that can. Furthermore, in the present invention, the demerit of the uneven packaging box is eliminated by shifting the central portion 6b of the side ruled line 6 to the inner side in the vertical direction with respect to both end portions 6a. In other words, the height of the end plate and the side plate is different in a multi-level packaging box, so that the load is unbalanced against these, resulting in a weak box strength when stacked. In this regard, in the packaging box of the present invention, the height of the end plate 1 and the side plate 2 can be made substantially uniform by recessing the central portion 6b of the side ruled line 6, so that the load at the time of stacking is balanced. As a result, the box strength is improved. Thus, according to the present invention, it is possible to eliminate the disadvantages while maintaining the advantages of the uneven packaging box.

  The packaging box of the present invention is formed by a single sheet member. When the thickness value of the sheet member is T, the first distance D is 30% or more and 200% or less with respect to T. It is preferable that it is the value of.

  In determining the distance (first distance D) where the both end portions 6a of the side ruled line 6 are different from the end ruled line 5 as in the above-described configuration, the entire packaging box is taken into account by taking into account the thickness T of the sheet member. The balance is improved.

  In the packaging box of the present invention, when the value of the one distance D is D, the second distance S is preferably 30% or more and 200% or less with respect to 1D.

  In determining the distance (second distance S) for shifting the central portion 6b of the side ruled line 6 with respect to the both end portions 6a as in the above configuration, the both end portions 6a of the side ruled line 6 are different from the end ruled lines 5. The balance of the entire packaging box is improved by considering the distance (first distance D).

  In the packaging box of the present invention, when the length value in the extending direction of the inner flap 3 is L and the length value in the circumferential direction of each of the both end portions 6a is E, The value is preferably 100% or more and 150% or less.

  As described above, the outer flap 4 is superimposed on the inner flap 3 by setting the length E in the circumferential direction of both end portions 6 a of the side ruled line 6 to be equal to or longer than the length L in the extending direction of the inner flap 3. Therefore, the shape can be prevented from being deformed. Furthermore, by making the length E and the length L substantially equal, it is possible to prevent the stacking strength of the packaging box from being lowered.

  In the packaging box of the present invention, it is preferable that both end portions 6a and the central portion 6b of the side ruled line 6 are formed in a straight line extending in the circumferential direction.

  If the both end portions 6a and the center portion 6b of the side ruled line 6 are formed in a curved shape, the packaging box is distorted and the strength at the time of stacking is reduced. On the other hand, by making the both end portions 6a and the center portion 6b of the side ruled lines 6 straight, it is possible to prevent the appearance of the packaging box from being distorted. Further, in the present invention, the both end portions 6a and the center portion 6b of the side ruled line 6 are formed at positions shifted from each other. Therefore, even if these portions are linear, the inner flap 3 and the outer flap 4 are not deformed. .

  In the packaging box of the present invention, the central portion 6b may be formed by a thick ruled line that is wider than the both end portions 6a by the second distance S on the inner side in the vertical direction.

  As in the above-described configuration, the same effect as that obtained by shifting the central portion 6b of the side ruled line 6 by the second distance S can be obtained by forming the thick ruled line that is wide by the second distance S. it can.

  As described above, the uneven packaging box has the advantage that the top and bottom surfaces can be made almost flat, but has the disadvantage that the box strength during stacking is reduced. In this respect, the present invention can eliminate the disadvantages while maintaining the advantages of the uneven packaging box. That is, according to the present invention, it is possible to provide an uneven packaging box in which the load of the load is applied in a well-balanced manner and the box strength is enhanced.

FIG. 1 is an exploded view showing a multi-level packaging box according to the first embodiment of the present invention. FIG. 2 is a perspective view schematically showing the uneven packaging box according to the first embodiment. FIG. 3 is a development view showing the uneven packaging box according to the second embodiment of the present invention. FIG. 4 is a development view showing the uneven packaging box according to the third embodiment of the present invention. FIG. 5 shows a normal packaging box. Fig.5 (a) is an expanded view of a normal packaging box, and FIG.5 (b) is the figure which looked at the assembly state of the normal packaging box from the end surface side. Fig. 6 shows the uneven packaging box before improvement. FIG. 6A is a development view of the uneven packaging box before improvement, and FIG. 6B is a view of the assembled state of the uneven packaging box before improvement as viewed from the end face side. FIG. 7 is a perspective view schematically showing the uneven packaging box before improvement.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, but includes those appropriately modified by those skilled in the art from the following embodiments.
In the present specification, “A to B” means A or more and B or less.

(1. First embodiment)
FIG. 1 is an exploded view showing a multi-level packaging box 10 according to the first embodiment of the present invention. As shown in FIG. 1, the packaging box 10 can be formed from a single sheet member. For example, a blank sheet of the packaging box 10 can be formed by cutting and processing a paper sheet member such as a cardboard sheet or cardboard.

  As shown in FIG. 1, the basic shape of the packaging box 10 according to the present invention is a form called A type. In the packaging box 10, a pair of end plates 1 facing each other and a pair of side plates 2 facing each other at the time of assembly are connected in the circumferential direction. That is, the end plate 1 and the side plate 2 are alternately connected two by two. Further, an inner flap 3 is connected to each of the upper end and the lower end of each end plate 1. For this reason, a total of four inner flaps 3 are provided. An outer flap 4 is connected to each of the upper end and the lower end of each side plate 2. For this reason, a total of four outer flaps 4 are provided. Further, an end ruled line 5 that functions as a fold line is formed at the boundary between each end plate 1 and each inner flap 3. Further, a side ruled line 6 that functions as a fold line is formed at the boundary between each side plate 2 and each outer flap 4. Further, of the pair of end plates 1 and the pair of side plates 2 that are connected, a plate (side plate 2 in FIG. 1) located at one end in the circumferential direction is extended with a joint allowance 7. A known adhesive is applied to the joint allowance 7. Thereby, the plate (side plate 2) located at one end in the circumferential direction and the plate (end plate 1) located at the other end in the circumferential direction can be connected by the joining allowance 7.

  When assembling the packaging box 10, first, the side plate 2 and the end plate 1 are connected using the joining allowance 7. As a result, the pair of end plates 1 and the pair of side plates 2 rise to form a rectangular frame. Thereafter, each inner flap 3 is bent toward the inside of the frame. Then, after folding each inner flap 3, each outer flap 4 is folded so as to overlap the inner flap 3. Thereby, the substantially rectangular parallelepiped packaging box 10 is assembled. FIG. 2 schematically shows a perspective view of the packaging box 10 assembled in this manner. The packaging box 10 of the present invention has such a basic structure.

Further, as in the example shown in FIG. 1, the end plate 1 is preferably shorter in the circumferential direction than in the circumferential direction of the side plate 2. As a result, the inner flap 3 connected to the end plate 1 is preferably shorter in the circumferential direction than the outer flap 4 connected to the side plate 2 in the circumferential direction.
However, the present invention is not limited to such a form. That is, the length of the end plate 1 in the circumferential direction may be longer than the length of the side plate 2 in the circumferential direction. Further, the length of the inner flap 3 in the circumferential direction may be longer than the length of the outer flap 4 in the circumferential direction.

Further, as in the example shown in FIG. 1, in the developed state, the leading edge of the inner flap 3 parallel to the end ruled line 5 and the leading edge of the outer flap 4 parallel to the side ruled line 6 are aligned. It is preferable that
However, a step may be formed between the leading edge of the inner flap 3 and the leading edge of the outer flap 4 in the deployed state.

  Here, the packaging box 10 of the present invention is characterized by the shape of the side ruled lines 6 located at the boundaries between the side plates 2 and the outer flaps 4. As shown in FIG. 1, each side ruled line 6 extends in the circumferential direction (direction in which the end plate 1 and the side plate 2 are connected). Each side ruled line 6 is divided into both end portions 6a in the circumferential direction and a central portion 6b located between both end portions 6a. In FIG. 1, the length in the circumferential direction of each of the both end portions 6a is indicated by a symbol E, and the length in the circumferential direction of the central portion 6b is indicated by a symbol C. Note that the length in the circumferential direction of each of the both end portions 6a is not the sum of the lengths of both the end portions 6a, but means the length of one end portion 6a. Since the ratio between the length E of each end portion 6a and the length C of the central portion 6b is not particularly limited, it may be determined in consideration of the shape and size of the entire packaging box 10. For example, the relationship of length E: length C can be appropriately determined in the range of 10:90 to 90:10. However, the length C of the central portion 6b is preferably longer than the length E of each end portion 6a. For example, when the length E is 100%, the length C is preferably 105% or more, particularly preferably 105% to 500%, 110% to 400, or 120% to 300%. .

  As shown in FIG. 1, both end portions 6 a of the side ruled line 6 are formed at positions shifted by the first distance D outside the end ruled line 5 in the vertical direction in the developed state. Here, the “vertical direction” is a direction orthogonal to the direction (circumferential direction) in which the end plate 1 and the side plate 2 are connected in the unfolded state. The vertical direction coincides with the height direction during assembly. Further, “outside” in the vertical direction means a direction away from the center of the side plate 2. As described above, in the packaging box 10 of the present invention, the both end portions 6a of the side ruled lines 6 are formed at positions shifted to the outside in the vertical direction from the end ruled lines 5, thereby making a difference.

  Thus, by making the both end portions 6a of the side ruled lines 6 different from the end ruled lines 5, the shape of the outer flap 4 is deformed when the outer flap 4 is superimposed on the inner flap 3 during assembly. Thus, distortion can be prevented. From this point of view, the distance (first distance D) that the both end portions 6a of the side ruled line 6 are displaced from the end ruled line 5 is the thickness of the inner flap 3, that is, the thickness of the sheet member (cardboard or cardboard sheet) forming the packaging box. It is preferable to set in consideration of the above. In the present specification, the thickness of the sheet member is T. For example, the thickness of the sheet member is generally about 0.5 mm to 15 mm, 1 mm to 10 mm, or 3 mm to 5 mm. In such a case, the first distance D is preferably 30% to 200% of T. In particular, the first distance D is preferably 100% to 150% or 100% to 130% with respect to T, and particularly preferably 100% (± 5%). As described above, by making the first distance D approximate or coincide with the thickness T of the sheet member, the inner flap 3 can easily be accommodated in the step (D) between the both end portions 6a of the side ruled line 6 and the end ruled line 5. Further, when the outer flap 4 is stacked on the inner flap 3, the distortion of the outer flap 4 can be minimized.

  Furthermore, as shown in FIG. 1, in the unfolded state, the central portion 6b of the side ruled line 6 is formed at a position shifted by the second distance S on the inner side in the vertical direction with respect to both end portions 6a. The “inner side” in the vertical direction means a direction approaching the center of the side plate 2. That is, as shown in FIG. 1, the side ruled line 6 has a central portion 6b that is recessed inward in the vertical direction with respect to both end portions 6a. In the side ruled line 6, the deviation width between the both end portions 6 a and the central portion 6 b is indicated by a second distance S. The second distance S is preferably 0.5 mm or more, and more preferably 1 mm or more. For example, the second distance S is preferably 0.5 mm to 15 mm, 1 mm to 10 mm, or 3 mm to 5 mm.

The central portion 6b of the side ruled line 6 is located above and below the both end portions 6a of the side ruled line 6 for the purpose of aligning the height of the side plate 2 and the end plate 1 as much as possible in the portion where the central portion 6b is formed. It is formed at a position shifted toward the inside in the direction. That is, FIG. 2 shows a state where the blank sheet of the packaging box 10 shown in FIG. 1 is assembled. In FIG. 2, when the packaging boxes 1 are stacked, a portion to which a load is applied first is indicated by a black arrow, and a portion to which a load is applied later is indicated by a white arrow. In the present invention, both end portions 6 a of the side ruled lines 6 are stepped outward from the end ruled lines 5 in the vertical direction. For this reason, the height of the side plate 2 is higher than the height of the end plate 1 in the portion where the both end portions 6 a of the side ruled line 6 are formed. The length with which the side plate 2 becomes higher than the end plate 1 depends on the distance (first distance D) that the both end portions 6a of the side ruled line 6 are shifted to the outside in the vertical direction from the end ruled line 5. As described above, the side plate 2 is likely to be loaded at the time of stacking at a portion higher than the end plate 1. On the other hand, in the present invention, the central portion 6b of the side ruled line 6 is formed at a position shifted inward in the vertical direction from both end portions 6a. For example, the distance (second distance S) by which the center portion 6b of the side ruled line 6 is shifted is aligned as much as possible to the distance (first distance D) at which both end portions 6a of the side ruled line 6 are stepped. As a result, the side plate 2 is lowered at the central portion 6b by an amount corresponding to the height at the both end portions 6a. For this reason, the height of the side plate 2 coincides with the height of the end plate 1 in the portion where the central portion 6b of the side ruled line 6 is formed. For example, in FIG. 2, the height of the end plate 1, indicated at H _1, the height of the side plate 2 in the central portion 6b is indicated with H _2. Thus, the height H ₁ of the end plate 1, by aligning as possible height H ₂ of the side plate 2 in the central portion 6b, the entire package box 10, can be well-balanced distributed loads applied during stacking It becomes. As a result, the stacking strength of the entire packaging box 10 is improved.

From the above point of view, the second distance S at which the central portion 6b of the side ruled line 6 is shifted inward in the vertical direction from both end portions 6a is such that the both end portions 6a of the side ruled line 6 are outward in the vertical direction from the end ruled line 5. It is preferable that the first distance D deviating toward is substantially equal. For example, the second distance S is preferably 30% to 200%, or 50% to 180%, particularly preferably 80% to 120%, when the first distance D is 100%. More preferably, it is 90% to 110%, or 95% to 105%. Further, as described above, as a result of setting the first distance D and the second distance S, the height H ₁ of the end plate 1 and the height H of the side plate 2 in the portion where the central portion 6b of the side ruled line 6 is formed. ₂ are preferably matched as much as possible. For example, the height H ₂ is preferably 70% to 130%, or 80% to 120%, and 90% to 110%, or 95% to 105% with respect to the height H ₁ . Particularly preferred.

  Further, it is preferable that both end portions 6a and the central portion 6b of the side ruled line 6 are formed in a straight line. For example, both end portions 6a or the central portion 6b of the side ruled line 6 can be formed in an arc shape, but the outer shape of the packaging box may be distorted at the time of assembly, and the stacking strength may be reduced. In this respect, by making the both end portions 6a and the central portion 6b of the side ruled lines 6 straight, it is possible to prevent the packaging box from being distorted. In addition, what is necessary is just to connect between the both-ends part 6a and the center part 6b with a straight line as FIG. 1 shows.

  In FIG. 1, the length of the inner flap 3 in the extending direction is indicated by a symbol L. Here, the length L in the extending direction of the inner flap 3 is the shortest distance from the end ruled line 5 to the leading edge of the inner flap 3. The length L in the extending direction of the inner flap 3 can be appropriately changed depending on the shape and size of the packaging box. For example, the length L in the extending direction of the inner flap 3 is generally less than half or less than 2/5 of the circumferential length of the outer flap 4. The length in the circumferential direction of the outer flap 4 corresponds to the sum of the length E, the length C, and the length E shown in FIG.

Further, in the packaging box 10 of the present invention, it is preferable to consider the length L in the extending direction of the inner flap 3 when setting the length E in the circumferential direction of each end portion 6a of the side ruled line 6. For example, it is preferable that the length E of both end portions 6 a of the side ruled line 6 substantially coincides with the length L of the inner flap 3. Further, the length E of both end portions 6 a of the side ruled line 6 is preferably equal to or longer than the length L of the inner flap 3. For example, the length E of both end portions 6a of the side ruled line 6 is preferably 800% to 170%, or 100% to 150% with respect to the length L of the inner flap 3, and is preferably 100% to 140%. 100% to 130%, or 100% to 120% is particularly preferable. In this way, by setting the length E of the both end portions 6a of the side ruled line 6 to be equal to or longer than the length L of the inner flap 3, even when the outer flap 4 is stacked on the inner flap 3 when the packaging box is assembled. , It is possible to prevent the outer flap 4 from being deformed by the interference of the inner flap 3. Further, as described above, in order to improve the stacking strength of the entire packaging box 10, it is necessary to secure the length C of the central portion 6b of the side ruled line 6 to be somewhat long. For example, the length C of the central portion 6b is preferably longer than the length E of each end portion 6a. In this regard, if the length E of the both end portions 6a of the side ruled line 6 is set to be longer than the length L of the inner flap 3, the length C of the central portion 6b may not be ensured. For this reason, the length E of both end portions 6a of the side ruled line 6 is preferably set to 150% or less with respect to the length L of the inner flap 3.
In the present invention, the length E of the both end portions 6 a of the side ruled line 6 does not necessarily have to be longer than the length L of the inner flap 3. For example, the length E of the both end portions 6 a of the side ruled line 6 may be shorter than the length L of the inner flap 3.

Here, the most preferable form of the packaging box 10 of this invention is demonstrated. In the most preferable embodiment of the present invention, first, the first distance D at which the both end portions 6a of the side ruled lines 6 are displaced from the end ruled lines 5 is set to a value of 95% to 105% with respect to the thickness of the sheet member (D ≒ T). Next, a value of 95% to 105% of the second distance S at which the central portion 6b of the side ruled line 6 is displaced from both end portions 6a and the first distance D at which the both end portions 6a of the side ruled line 6 are displaced from the end ruled line 5 (S≈D). Further, the length C in the circumferential direction of the central portion 6b is set to be equal to or longer than the length E in the circumferential direction of both end portions 6a (C ≧ E). Further, the length E of each end portion 6a in the circumferential direction is set to a value of 95% to 105% with respect to the length L in the extending direction of the inner flap 3 (E≈L). Further, the height H ₂ of the side plate 2 in the portion where the central portion 6 b of the side ruled line 6 is formed is set to a value of 95% to 105% with respect to the height H ₁ of the end plate 1 (H ₂ ≈H ₁ ). By designing the packaging box 10 based on such conditions, the effects of the present invention can be exhibited most effectively.

(2. Second Embodiment)
FIG. 3 shows a development view of the packaging box 10 according to the second embodiment of the present invention. The second embodiment of the present invention will be described with a focus on differences from the first embodiment, and description of similar points will be omitted.
As shown in FIG. 3, the packaging box 10 according to the second embodiment is the first in that the central portion 6b of the side ruled line 6 is formed by a thick ruled line that is wider than both end portions 6a. This is different from the embodiment.

  As shown in FIG. 3, in the second embodiment, the central portion 6b of the side ruled line 6 is thicker in the vertical direction inside the both end portions 6a and wider than the both end portions 6a by the second distance S. It is formed with ruled lines. Such a thick ruled line can be formed by crushing a cardboard sheet or cardboard. The thickness of the central portion 6b of the side ruled line 6 corresponds to the second distance S. That is, the central portion 6b of the side ruled line is formed by a ruled line that is thicker by the second distance S than the both end portions 6b. The condition for the second distance S can be the same as that described in the first embodiment. In addition, the same conditions as those described in the first embodiment can be adopted for other general conditions.

  Even when the central portion 6b of the side ruled line 6 is formed by a thick ruled line having a width corresponding to the second distance S as in the second embodiment, the packaging box according to the first embodiment described above. The same effect can be obtained.

(3. Third embodiment)
FIG. 4 shows a development view of the packaging box 10 according to the third embodiment of the present invention. The third embodiment of the present invention will be described with a focus on differences from the first embodiment, and description of similar points will be omitted.
As shown in FIG. 4, in the packaging box 10 according to the third embodiment, the length E in the circumferential direction of each end portion 6 a of the side ruled line 6 is larger than the length L in the extending direction of the inner flap 3. , It is set short. In this respect, the third embodiment is different from the first embodiment.

  As in the third embodiment shown in FIG. 4, the length E in the circumferential direction of each end portion 6 a of the side ruled line 6 can be shorter than the length L in the extending direction of the inner flap 3. It is. For example, the length E of the both end portions 6a of the side ruled line 6 can be set to a value of 80% or less when the length L of the flap 3 is 100%. For example, the length E is preferably 30 to 80% or 40 to 70% with respect to the length L. By doing in this way, the length C in the circumferential direction of the central portion 6b of the side ruled line 6 can be secured relatively long. For this reason, according to 3rd Embodiment, even if it is a multi-level packaging box, it becomes possible to distribute the load at the time of stacking with sufficient balance, and as a result, the intensity | strength of the whole packaging box improves.

  As mentioned above, in this specification, in order to express the content of this invention, embodiment of this invention was described, referring drawings. However, the present invention is not limited to the above-described embodiments, but includes modifications and improvements obvious to those skilled in the art based on the matters described in the present specification.

  The present invention relates to a packaging box having uneven ruled lines. For this reason, this invention can be utilized suitably in the manufacturing industry of a packaging box, etc.

DESCRIPTION OF SYMBOLS 1 ... End plate 2 ... Side plate 3 ... Inner flap 4 ... Outer flap 5 ... End ruled line 6 ... Side ruled line 6a ... Both ends part 6b ... Central part 7 ... Joining allowance 10 ... Packaging box

Claims (5)

A pair of end plates (1) facing each other;
A pair of side plates (2) connected in the circumferential direction of the pair of end plates (1) and facing each other;
An inner flap (3) connected to the upper and lower ends of each of the pair of end plates (1);
An outer flap (4) connected to the upper and lower ends of each of the pair of side plates (2);
End ruled lines (5) formed at the boundary between the pair of end plates (1) and the inner flap (3);
A side ruled line (6) formed at the boundary between the pair of side plates (2) and the outer flap (4);
A packaging box having
The side ruled line (6) is
Both end portions (6a) in the circumferential direction;
A central portion (6b) located between the end portions (6a);
The both end portions (6a) are formed at positions shifted by a first distance (D) on the outer side in the vertical direction from the end ruled line (5),
The central portion (6b) is formed at a position displaced from the both end portions (6a) in the vertical direction by a second distance (S) ,
The packaging box in which the second distance (S) is 95% or more and 105% or less with respect to the first distance (D) . The packaging box is formed by a single sheet member,
The packaging box according to claim 1, wherein the first distance (D) is 95% or more and 105% or less with respect to the thickness (T) of the sheet member . The length value in the extending direction of the inner flap (3) is L,
When the length value in the circumferential direction of each of the both end portions (6a) is E,
The packaging box according to claim 1 or 2 , wherein E is a value of 100% or more and 150% or less with respect to L. The packaging box according to any one of claims 1 to 3 , wherein both the end portions (6a) and the central portion (6b) of the side ruled line (6) are formed in a straight line extending in the circumferential direction. A pair of end plates (1) facing each other;
A pair of side plates (2) connected in the circumferential direction of the pair of end plates (1) and facing each other;
An inner flap (3) connected to the upper and lower ends of each of the pair of end plates (1);
An outer flap (4) connected to the upper and lower ends of each of the pair of side plates (2);
End ruled lines (5) formed at the boundary between the pair of end plates (1) and the inner flap (3);
A side ruled line (6) formed at the boundary between the pair of side plates (2) and the outer flap (4);
A packaging box having
The side ruled line (6) is
Both end portions (6a) in the circumferential direction;
A central portion (6b) located between the end portions (6a);
The both end portions (6a) are formed at positions shifted by a first distance (D) on the outer side in the vertical direction from the end ruled line (5),
The central portion (6b) is formed by a thick ruled line having a width corresponding to the second distance (S) from the both end portions (6a) inside the both end portions (6a) in the vertical direction ,
The packaging box in which the second distance (S) is 95% or more and 105% or less with respect to the first distance (D) .

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