JP5871857B2 - Packaging box - Google Patents

Description

  The present invention relates to a packaging box in which an accommodation space for accommodating an object to be packaged is formed.

  Products such as image forming apparatuses and their accessories are distributed on the market in a state of being stored in a packaging box such as a cardboard case. When the user takes out the product from the opened packaging box and obtains the product, the user discards the unnecessary packaging box. However, depending on the user, the product may be taken out of the packaging box to check the operation of the product, and the packaging box may be temporarily stored, then returned to the packaging box after the operation check and stored in a warehouse or the like. . In some cases, the packaging box from which the product is taken out is temporarily stored in a storage shelf or a warehouse without being immediately discarded. For example, a cartridge case used for consumables such as a toner cartridge and an ink cartridge used in an image forming apparatus may be a target for recycling, and a packaging box after opening as an application to store an empty cartridge case Is stored.

  As an example of this type of packaging box, Patent Document 1 discloses a packaging box capable of judging an unopened packaging box and an opened packaging box from the appearance. This packaging box is a state where the projecting piece broken along the breaking line at the time of opening is lifted from the side, and the user can check whether the projecting part has been lifted or not Can be judged.

JP 2008-74418 A

  However, the packaging box described in the above-mentioned Patent Document 1 requires a wider storage space than the unopened packaging box because the protruding piece part is lifted from the side after opening. Further, even if the projecting piece portion is cut along the breaking line, the fracture surface and the projecting piece portion may be caught, and the projecting piece portion may not be lifted from the side surface. In this case, it is not possible to determine whether or not the packaging box is empty only by looking from the outside. Moreover, when the product is accommodated again after being opened, the conventional packaging box cannot easily determine from the appearance whether the product is accommodated inside.

  This invention is made | formed in view of the said situation, The objective is to provide the packaging box which can judge easily from the appearance whether the packaging target object is accommodated in the inside.

  The present invention is configured as a packaging box including a box, a lid, a first through window, a first flap, a slit, and a protruding piece. The box body has a first side plate and a second side plate facing the first side plate, and is partitioned by connecting both side ends of the first side plate and the second side plate, and is packaged from an opening on the upper surface. An accommodation space in which an object is accommodated is formed. The lid is configured to be changeable between a closed posture in which the opening is closed and an open posture in which the opening is opened with the upper end of the first side plate as a base end. The first through window penetrates the second side plate. The first flap is connected to the upper end of the second side plate and is foldable. The first flap is bent toward the inner surface side of the second side plate according to the presence or absence of the packaging object in the accommodation space. Cover the window. The slit is provided in a bent portion of the first flap and penetrates the first flap. The protruding piece protrudes from an end of the lid on the second side plate side, is bent to the back side of the lid, and is configured to be inserted into the slit when the lid is in the closed position, The first through window is covered when inserted into the slit. The identifier which shows the presence or absence of the said packaging target object in the said accommodation space is attached | subjected to the exposed part exposed from the said 1st penetration window in the said protrusion piece, the said 1st flap, or any one.

  According to the present invention, it is possible to easily determine from the appearance whether or not a packaging object is contained inside.

FIG. 1 is a perspective view showing a configuration of a packaging box according to an embodiment of the present invention. FIG. 2 is a perspective view showing the configuration of the packaging box according to the embodiment of the present invention. FIG. 3 is a cross-sectional view of the packaging box according to the embodiment of the present invention, and shows a cross-sectional structure taken along section line III-III in FIG. FIG. 4 is a cross-sectional view of the packaging box according to the embodiment of the present invention, and shows a cross-sectional structure taken along line IV-IV in FIG. FIG. 5 is a developed view showing a developed state of the packaging box according to the embodiment of the present invention. FIG. 6 is a cross-sectional view of a packaging box according to another embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate. The embodiment described below is merely an example embodying the present invention, and the embodiment of the present invention can be changed as appropriate without departing from the scope of the present invention.

[Outline of packaging box 10]
First, with reference to FIG. 1 thru | or FIG. 4, the structure of the packaging box 10 which concerns on embodiment of this invention is demonstrated. Here, FIG. 1 is a perspective view showing the packaging box 10 in a closed posture with the lid 12 closed, and FIG. 2 shows the packaging box 10 in an open posture with the lid 12 opened. It is a perspective view. 3A and 4A show a state where the packaging object 90 is accommodated, and FIGS. 3B and 4B show that the accommodation space 15 is empty. The state of is shown. In the following description, the vertical direction 6 is defined with the posture of the packaging box 10 when the lid body 12 of the packaging box 10 is on the upper side as a reference posture, and the side where the connecting portion of the lid body 12 is located is the rear back surface. A front-rear direction 7 is defined, and a left-right direction 8 is defined when the packaging box 10 is viewed from the front.

  The packaging box 10 shown in FIG.1 and FIG.2 packages the packaging target object 90 (refer FIG. 3), and is an example of the packaging box of this invention. The packaging box 10 is formed by being assembled from a sheet material such as a resin sheet or a cardboard sheet. In the present embodiment, the packaging box 10 is formed of a corrugated cardboard sheet that has a cushioning property and a certain degree of flexibility, is lightweight and has sufficient strength, and can be easily folded. The packaging box 10 mainly includes a box body 11 and a lid body 12, and the lid body 12 is configured to be rotatable with respect to the box body 11.

[Box 11]
The box 11 has a box shape formed in a rectangular parallelepiped shape that is long in the left-right direction 8, and an accommodation space 15 (see FIG. 3, corresponding to the accommodation space of the present invention) in which the packaging object 90 is accommodated. Is formed. The box 11 includes a bottom plate 20 (see FIG. 3), four side plates 21 to 24 (first side plate 21, second side plate 22, third side plate 23, fourth side plate 24), three flaps 31 to 33 (first A flap 31, a second flap 32, a third flap 33) and the like are provided. In the present embodiment, the housing space 15 of the box 11 is formed by connecting the end portions of the first side plate 21 and the second side plate 22. Specifically, the accommodation space 15 is defined by the bottom plate 20 and the four side plates 21 to 24. The box body 11 has an opening 17 on the upper surface, and the packaging object 90 can be accommodated in the accommodation space 15 from the opening 17.

  The bottom plate 20 is formed in a rectangular shape in which the left-right direction 8 is longer than the front-rear direction 7. A first side plate 21 (see FIG. 3, an example of the first side plate of the present invention) constituting the rear rear surface of the packaging box 10 is connected to the rear end of the bottom plate 20. A second side plate 22 (an example of the second side plate of the present invention) is provided to face the front side of the first side plate 21. The second side plate 22 constitutes the front surface of the packaging box 10 and is connected to the front end of the bottom plate 20. Both the first side plate 21 and the second side plate 22 are connected to the bottom plate 30 at an angle of 90 ° with respect to the bottom plate 20.

  A third side plate 23 and a fourth side plate 24 are provided adjacent to the first side plate 21 and the second side plate 22. The third side plate 23 constitutes the right side surface of the box plate 11, and is connected to the right end of each of the first side plate 21 and the second side plate 22 and the right end of the bottom plate 20. The fourth side plate 24 (see FIG. 4) forms the left side surface of the box plate 11 and is connected to the left end of each of the first side plate 21 and the second side plate 22 and the left end of the bottom plate 20. The third side plate 23 and the fourth side plate 24 are both examples of the third side plate of the present invention.

  As shown in FIG. 2, the second side plate 22 is provided with a flap 31 (an example of the first flap of the present invention). The flap 31 is connected to the upper end of the second side plate 22 and is formed integrally with the second side plate 22. As shown in FIG. 2, the flap 31 is bent toward the accommodation space 15 at the connecting portion 35 with the second side plate 22. The flap 31 covers the opening 17 with respect to the upper end of the second side plate 22 as shown in FIG. 2, and is further bent by approximately 90 ° from this posture and faces the inner surface 22A of the second side plate 22 (FIG. 3). (See (A)). When the flap 31 is displaced to the posture facing the inner surface 22A, the flap 31 covers a through window 41 described later. In the present embodiment, the flap 31 is displaced to a posture facing the inner surface 22 </ b> A according to the presence or absence of the packaging object 90 in the accommodation space 15. Specifically, when the packaging object 90 is in the accommodation space 15, the flap 31 is displaced to a posture facing the inner surface 22 </ b> A to cover the through window 41 (see FIG. 3A), and the packaging space 15 is to be packaged. When there is no object 90, the through window 41 is not covered (see FIG. 3B).

  The second side plate 22 is provided with a protruding piece 51. The protruding piece 51 is engaged with the lid body 12 to connect the lid body 12 and the second side plate 22. The protruding piece 51 is provided at the center of the connecting portion 35 between the flap 31 and the second side plate 22. The protruding piece 51 is configured by partially cutting the central portion of the connecting portion 35. Specifically, the projecting piece 51 is cut into a semi-elliptical shape from a position spaced a predetermined length from the central portion of the connecting portion 35 to the flap 31 side to the connecting portion 35, and the second side plate 22 is further connected to the connecting portion 35 from the connecting portion 35. This is realized by cutting downward. A linear fold 55 is formed at the lower end of the protruding piece 51 so as to connect the end of the cutting line in the second side plate 22, and the protruding piece 51 is bent at the fold 55. That is, the protruding piece 51 can be bent with the fold 55 as a reference. The protruding piece 51 is inserted into a slit 47 described later formed in the lid body 12.

  As shown in FIG. 2, a slit 45 (an example of a slit according to the present invention) is formed in the connecting portion 35 between the second side plate 22 and the flap 31. In other words, the slit 45 is formed in the bent portion of the flap 31. The slit 45 penetrates the flap 31 to the back surface side. The slit 45 is formed at the center of the connecting portion 35. More specifically, the slit 45 is continuous with the semi-elliptical cutout 34 formed in the flap 31 when the protruding piece 51 is formed, and is further connected from both ends in the left-right direction of the cutout 34. 35 extending along the line 35. In the present embodiment, the slit 45 is formed to have a length that is approximately half the length of the connecting portion 35. A protruding piece 52 described later is inserted into the slit 45.

  A through window 41 (an example of the first through window of the present invention) is formed in the second side plate 22. The through window 41 penetrates the second side plate 22 into the housing space 15, and the housing space 15 communicates with the outside through the through window 41 when the through window 41 is not covered with other members. The penetrating window 41 is located near the upper end of the second side plate 22, slightly downward from the slit 45, and is disposed on the right side of the protruding piece 52. In the present embodiment, the through window 41 is formed in a rectangular shape. The shape of the through window 41 is not limited to a rectangular shape. As long as it penetrates the second side plate 22, it may be formed in any shape.

  When the flap 31 is in a posture to cover the through window 41, a portion 31 </ b> B (corresponding to the exposed portion of the present invention) overlapping the through window 41 on the back surface 31 </ b> A of the flap 31 is exposed from the through window 41. Therefore, when the flap 31 is in a posture to cover the through window 41, the portion 31 </ b> B is exposed to the outside of the second side plate 22 through the through window 41. Thereby, the user can see the part 31 </ b> B from the outside when the flap 31 is in a posture to cover the through window 41. In this embodiment, the identifier which shows the presence or absence of the packaging target object 90 in the accommodation space 15 is attached | subjected to the part 31B. Specifically, a “exist” mark 86 (see FIG. 5, corresponding to the presence identifier of the present invention) indicating the presence of the packaging object 90 in the accommodation space 15 is written in the portion 31B. The effect of the marking 86 will be described later.

  The third side plate 23 is formed with a through window 42 (an example of the second through window of the present invention). The penetration window 42 penetrates the third side plate 23 to the accommodation space 15, and the accommodation space 15 communicates with the outside through the penetration window 42 in a state where the penetration window 42 is not covered with other members. The through window 42 is formed at the center of the third side plate 23. The through window 42 has the same size and the same shape as the through window 41 formed in the second side plate 22, that is, a rectangular shape. Of course, the shape of the through window 42 is not limited to the same shape and size as the through window 41.

  The third side plate 23 is provided with a flap 32 (an example of the second flap of the present invention). The flap 32 is connected to the upper end of the third side plate 23 and is formed integrally with the third side plate 23. As shown in FIG. 2, the flap 32 is bent toward the accommodation space 15 at the connecting portion 36 with the third side plate 23. In the present embodiment, the flap 32 is bent by approximately 90 ° from the posture shown in FIG. 2 that covers a part of the right side portion of the opening 17 with the upper end of the third side plate 23 as a reference, and the third side plate. It can be displaced between the posture facing the inner surface 23A (see FIG. 4) of 23. When the flap 32 is displaced to the posture facing the inner surface 23 </ b> A, the flap 32 covers the through window 42.

  When the flap 32 is in a posture to cover the through window 42, a portion 32 </ b> B (corresponding to the exposed portion of the present invention) that overlaps the through window 42 on the back surface 32 </ b> A of the flap 32 is exposed to the outside. That is, the portion 32B and the through window 42 are provided at positions that overlap each other. Therefore, when the flap 32 is in a posture to cover the through window 42, the portion 32 </ b> B is exposed to the outside of the third side plate 23 through the through window 42. Thus, the user can see the portion 32B from the outside when the flap 32 is in a posture to cover the through window 42. In the present embodiment, an identifier indicating the presence or absence of the packaging object 90 in the accommodation space 15 is attached to the portion 32B. Specifically, in the portion 32B exposed from the through window 42 in the third side plate 24, a “present” mark 87 indicating the presence of the packaging object 90 in the accommodating space 15 (see FIG. Is equivalent). The effect of the marking 87 will be described later.

  As shown in FIG. 5, the fourth side plate 24 is formed with a through window 43 (an example of the second through window of the present invention). The through window 43 penetrates the third side plate 23 into the housing space 15, and the housing space 15 and the outside communicate with each other through the through window 42 in a state where the through window 42 is not covered with other members. The through window 42 is formed at the center of the third side plate 23. The through window 42 has the same size and the same shape as the through window 41 formed in the second side plate 22, that is, a rectangular shape. Of course, the shape of the through window 42 is not limited to the same shape and size as the through window 41.

  As shown in FIGS. 2 and 4, the fourth side plate 24 is provided with a flap 33 (an example of the second flap of the present invention). The flap 33 has the same size and the same shape as the flap 32. The flap 33 is connected to the upper end of the fourth side plate 24. The flap 33 is continuous with the fourth side plate 24 and is formed integrally with the fourth side plate 24. As shown in FIG. 2, the flap 33 is bent toward the accommodation space 15 at the connecting portion 37 with the fourth side plate 24. In the present embodiment, the flap 33 is further bent by approximately 90 ° from the posture shown in FIG. 2 covering a part of the left side portion of the opening 17 with the upper end of the fourth side plate 24 as a reference, and the fourth side plate. It can be displaced between the posture facing the inner surface 24A of 24 (see FIG. 4). When the flap 33 is displaced to the posture facing the inner surface 24 </ b> A, the flap 33 covers the through window 43.

  When the flap 33 is in a posture to cover the through window 43, a portion 33 </ b> B overlapping the through window 43 on the back surface 33 </ b> A of the flap 33 is exposed from the through window 43 to the outside. That is, the portion 33B and the through window 43 are provided at positions that overlap each other. Therefore, when the flap 33 covers the through window 43, the portion 33 </ b> B is exposed to the outside of the fourth side plate 24 through the through window 43. Thereby, the user can see the portion 33 </ b> B from the outside when the flap 33 is in a posture to cover the through window 43. In this embodiment, the identifier which shows the presence or absence of the packaging target object 90 in the accommodation space 15 is attached | subjected to the part 33B. Specifically, in the portion 33B exposed from the through window 43 in the fourth side plate 24, a “present” mark 88 indicating the presence of the packaging object 90 in the accommodation space 15 (see FIG. 5; Is equivalent). The effect of the marking 88 will be described later.

[Cover 12]
The lid 12 is provided on the box 11. As shown in FIG. 3, the lid body 12 is connected to the upper end of the first side plate 21. The lid body 12 is formed in a size and shape that can cover the opening 17. Specifically, the lid body 12 is formed in substantially the same rectangular shape as the opening 17. The lid 12 is continuous with the first side plate 21 and is formed integrally with the first side plate 21. For this reason, the lid 12 can be bent with reference to the connecting portion 38 with the first side plate 21. In the present embodiment, the lid body 12 has a closed posture (the posture shown in FIG. 1) that covers and closes the opening 17 with the connecting portion 38 as a reference, and an open posture that opens the accommodation space 15 away from the opening 17. The posture can be changed between (the posture shown in FIG. 2).

  The lid body 12 is provided with a protruding piece 52 (an example of the protruding piece of the present invention). The protruding piece 52 is formed in a shape protruding from the end 12 </ b> A on the second side plate 22 side of the lid body 12. The protruding piece 52 is continuous with the lid body 12 and is bent toward the back surface side of the lid body 12 at the end portion 12A. The protruding piece 52 is formed so that it can be inserted into the slit 45 when the lid 12 is in the closed posture. In the present embodiment, the protruding piece 52 is inserted into the slit 45 as shown in FIG. 3B when there is no packaging object 90 in the accommodation space 15 as desired by the user. Further, when there is a packaging object 90 in the accommodation space 15, the flap 31 is inserted further into the accommodation space 15 side with the flap 31 displaced to a position corresponding to the inner surface 22A as shown in FIG. Is done.

  Further, as shown in FIG. 2, a slit 47 into which the protruding piece 51 can be inserted is formed at the center of the connecting portion 39 between the protruding piece 52 and the lid body 12. The slit 47 penetrates the connecting portion 39 to the back surface side. With the protruding piece 52 inserted into the slit 45, the protruding piece 51 is further inserted into the slit 47, so that the lid 12 and the box 11 are firmly connected, and the packaging box 10 is securely sealed. can do.

  When the protruding piece 52 is inserted into the accommodation space 15 in a state where the flap 31 is displaced to a position facing the inner surface 22A when the lid body 12 is in the closed posture, as shown in FIG. A back surface 31A of 31 covers the through window 41 from the accommodation space 15 side. At this time, as described above, when the flap 31 is in a posture to cover the through window 41, the portion 31 </ b> B overlapping the through window 41 on the back surface 31 </ b> A of the flap 31 is exposed from the through window 41.

  When the protruding piece 52 is inserted into the slit 45 when the lid 12 is in the closed posture, the protruding piece 52 is disposed so as to face the inner surface 22A of the second side plate 22 as shown in FIG. Thus, the protruding piece 52 covers the through window 41 from the accommodation space 15 side. When the protruding piece 52 is in a posture to cover the through window 41, a portion 52 </ b> B (corresponding to the exposed portion of the present invention) overlapping the through window 41 on the outer surface 52 </ b> A of the protruding piece 52 is exposed from the through window 41. Therefore, when the protruding piece 52 is in a posture to cover the through window 41, the portion 52 </ b> B is exposed to the outside of the second side plate 22 through the through window 41. Thereby, the user can see the portion 52 </ b> B from the outside when the lid 12 is in a posture to cover the through window 41. In this embodiment, the identifier which shows the presence or absence of the packaging target object 90 in the accommodation space 15 is attached | subjected to the part 52B. Specifically, a “none” mark 85 (FIGS. 2 and 5) indicating the absence of the packaging object 90 in the accommodation space 15 in the portion 52B exposed from the through window 41 when the protruding piece 51 is inserted into the slit 45. Reference, corresponding to the absence identifier of the present invention). The effect of the marking 85 will be described later.

[Assembly method of packaging box 10]
Hereinafter, the detailed configuration of the packaging box 10 will be described with reference to FIG. Here, FIG. 5A is a diagram when the unfolded state of the packaging box 10 is viewed from the front surface, and FIG. 5B is a diagram when the unfolded state of the packaging box 10 is viewed from the back surface. .

  The packaging box 10 is made of a sheet-like cushioning material such as a sheet material made of cardboard. Specifically, the box body 11 and the lid body 12 are integrally formed by the cut sheet 60 obtained by cutting the cardboard sheet as shown in the development view of FIG. The packaging box 10 is configured by assembling the cut sheet 60 by being bent. The cut sheet 60 is composed of a corrugated cardboard sheet having a constant overall thickness. Therefore, the strength of each part of the cut sheet 60 is constant. The thickness of the cut sheet 60 is not particularly limited, but in the present embodiment, a cut sheet 60 of approximately 5 mm is employed. In this embodiment, the cut sheet 60 in which the box body 11 and the lid body 12 are integrally formed is illustrated, but after each is assembled by individual cut sheets, each is connected by a joining means such as an adhesive. It may be what was done.

  As shown in FIG. 5, the cut sheet 60 is formed with fold lines 62 to 64 that divide each part. Accordingly, the cut sheet 60 includes a back surface portion 81 including the first side plate 21, a front surface portion 82 including the second side plate 22, a right side surface portion 83 including the third side plate 23, and a left side surface portion 84 including the fourth side plate 24. It is divided into and. In addition, fold lines 65 to 67 are formed in the back surface portion 81, and these are partitioned into the first side plate 21, the lid body 12, the bonding portion 57, and the connecting piece 76 that constitutes the bottom plate 20. . In addition, fold lines 68 and 69 are formed in the front surface portion 82, and these are partitioned into the second side plate 22, the flap 31, and the connecting piece 77 constituting the bottom plate 20. In addition, the right side portion 83 is formed with folds 70 and 71, which are partitioned into a third side plate 23, a flap 32, and a connecting piece 78 constituting the bottom plate 20. Further, the left side surface portion 84 is formed with folds 72 and 73, which are partitioned into a fourth side plate 24, a flap 33, and a connecting piece 79 constituting the bottom plate 20. The adhesive portion 57 protrudes in a tongue shape from the longitudinal end portion of the first side plate 21 and is a portion joined to the third side plate 23 by an adhesive or the like as will be described later.

  A method for assembling the packaging box 10 configured as described above will be described. First, the assembly operator folds the cut sheet 60 along the fold lines 61 to 64 and folds the adhesive portion 57 along the fold line 67. Thereby, since the adhesion part 57 and the 3rd side board 23 are match | combined, an adhesive agent is apply | coated to the alignment part and the adhesion part 57 and the 3rd side board 23 are joined. Next, the cut sheet 60 is mountain-folded along the fold lines 66, 69, 71, 73, and all the connecting pieces 76-79 are bent at a right angle. Thereafter, the connecting pieces 76 to 79 are connected to each other by combining protrusions provided on the connecting pieces 76 to 79. Thereby, the baseplate 20 is comprised. Next, the cut sheet 60 is mountain-folded along the fold lines 65, 68, 70, 72, and the lid body 12, the flap 31, the flap 32, and the flap 33 are bent at a right angle. The packaging box 10 according to this embodiment shown in FIG. 2 is completed by the above assembly process.

[Effects of Embodiment]
Hereinafter, the sealing method of the packaging box 10 comprised as mentioned above is demonstrated. The packaging box 10 is different in a sealing method when the packaging object 90 is accommodated in the accommodation space 15 and a sealing method when the accommodation space 15 is empty. Specifically, when the packaging object 90 is accommodated in the accommodation space 15, the flap 31 is bent so as to face the back surface of the second side plate 22 as shown in FIG. After the flaps 32 and 33 are bent so as to face the back surfaces of the side plates 23 and 24, the accommodation object 90 is accommodated in the accommodation space 15. Then, the lid 12 is changed from the open posture to the closed posture, and the lid 12 and the second side plate 22 are connected. At this time, the protruding piece 52 of the lid 12 is not inserted into the slit 45 but is inserted into the gap between the folded flap 31 and the packaging object 90. Thereafter, the protruding piece 51 is inserted into the slit 47. By being sealed in this way, the “present” marks 87 and 88 are exposed in the through windows 42 and 43. Further, the “present” mark 86 is also exposed in the through window 41. Thereby, the user can grasp | ascertain that the packaging target object 90 exists in the inside of the packaging box 10 only by visually observing the packaging box 10 from the outside.

  On the other hand, when the accommodation space 15 is empty, the lid 12 is changed from the open position to the closed position with the flaps 31 to 33 being in a natural state as shown in FIG. 22 is connected. Specifically, the protruding piece 52 is inserted into the slit 45, and then the protruding piece 51 is inserted into the slit 47. At this time, the flaps 31 to 33 are stationary at a position where the angle is 60 ° to 90 ° with respect to the side plates 22 to 24 by the restoring force of the material of the packaging box 10. That is, the flaps 31 to 33 do not cover the through windows 41 to 43. By being sealed in this way, neither identifier is exposed in the through windows 42 and 43, and the “no” mark 85 written on the protruding piece 52 is exposed only in the through window 41. Thereby, the user can grasp | ascertain that there is no packaging target object 90 inside the packaging box 10 only by visually observing the packaging box 10 from the outside.

  In the above-described embodiment, the example in which the cut sheet 60 is formed of a corrugated cardboard sheet that is a sheet-like cushioning material and is folded to constitute the packaging box 10 has been described. However, the material of the cut sheet 60 is corrugated cardboard. Not limited to seats. Any material can be applied as long as the flaps 31 to 33 have a restoring force enough to separate from the side plates 22 to 24 in a natural state.

  In the above-described embodiment, the “none” mark 85 and the “present” marks 86 to 88 are used as identifiers. However, any identifier may be used as long as the user can grasp the presence / absence of a packaging object. For example, a mark such as a circle or a mark may be used, or an identifier that can be identified by color.

  Moreover, although the above-mentioned embodiment demonstrated the example which attached | subjected the identifier to all the protrusion pieces 52 and the flaps 31-33, if the identifier was attached | subjected at least to the protrusion pieces 52, the presence or absence of the identifier will be confirmed visually. By doing so, the user can easily grasp from the appearance whether or not the packaging object 90 is inside the packaging box 10.

  In the above-described embodiment, the example in which the protruding piece 51 is inserted into the slit 47 and the packaging box 10 is sealed when the packaging object 90 is not accommodated in the accommodation space 15 has been described. It is not restricted to such an example. For example, the sealing method shown in FIG. 6 (A) may be employed. That is, after the packaging object 90 is accommodated in the accommodation space 15, the flap 31 is folded to a position that covers the upper surface of the packaging object 90, and the flaps 32 and 33 are further folded to a position that covers the upper surface of the packaging object 90. Then, the lid 12 is changed from the open posture to the closed posture, and the lid 12 and the second side plate 22 are connected. At this time, the protruding piece 52 is inserted into the slit 45, and then the protruding piece 51 is inserted into the slit 47. In this case, since the flaps 31 to 33 do not cover the through windows 41 to 43, the exposed portions 31B, 32B, and 33B are not exposed from the through windows 41 to 43, and only the exposed portion 52B of the protruding piece 52 is removed from the through window 41. Exposed. In such a sealing method, an “exist” mark 86 indicating the presence of the packaging object 90 in the accommodation space 15 is marked on the exposed portion 52B. Thereby, the user can grasp | ascertain that the packaging target object 90 exists in the inside of the packaging box 10 only by visually observing the packaging box 10 from the outside. In addition, the packaging box 10 is firmly sealed with the packaging object 90 packed in the packaging box 10.

  On the other hand, when the accommodation space 15 is empty, the flaps 32 and 33 are left in a natural state as shown in FIG. 6B, and the flap 31 is bent so as to face the back surface of the second side plate 22. After the state, the lid body 12 is changed from the open position to the closed position, and the lid body 12 and the second side plate 22 are connected. At this time, the protruding piece 52 of the lid 12 is inserted into the accommodation space 15 side of the folded flap 31 without being inserted into the slit 45. Thereafter, the protruding piece 51 is inserted into the slit 47. In this case, the flaps 32 and 33 are stationary at a position where the angle is 60 ° to 90 ° with respect to the side plates 23 and 24 by the restoring force of the material of the packaging box 10. Therefore, the identifier is not exposed in the through windows 42 and 43. Further, the exposed portion 31 </ b> B is exposed from the through window 41. In such a sealing method, an “absent” mark 85 indicating the absence of the packaging object 90 in the accommodation space 15 is marked on the exposed portion 52B. Thereby, the user can grasp | ascertain that there is no packaging target object 90 inside the packaging box 10 only by visually observing the packaging box 10 from the outside. Further, when the packaging box 10 is empty, a robust seal is not necessary. Therefore, when sealing the empty packaging box 10, a simple sealing method that eliminates the work of inserting the protruding piece 52 into the slit 45 can be employed.

  The embodiment of the present invention has been described above, but the scope of the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention.

10: packaging box 11: box 12: lid 15: accommodation space 17: opening 20: bottom plate 21: first side plate 22: second side plate 23: third side plate 24: fourth side plates 31-33: flaps 41-43 : Through window 45: Slit 47: Slit 90: Packaging object

Claims (6)

The first side plate has a second side plate facing the first side plate, and is partitioned by connecting both side ends of the first side plate and the second side plate, and a packaging object is received from the opening on the upper surface. A box in which a housing space is formed,
A lid that can change its posture between a closing posture that closes the opening and an opening posture that opens the opening with the upper end of the first side plate as a base end;
A first through window penetrating the second side plate;
A first flap that is connected to the upper end of the second side plate and is foldable, and is bent to the inner surface side of the second side plate according to the presence or absence of the packaging object in the accommodation space to cover the first through window. When,
A slit provided in a bent portion of the first flap, and penetrating the first flap;
Projected from the end of the lid on the second side plate side, bent to the back side of the lid, configured to be insertable into the slit when the lid is in the closed position, and inserted into the slit And a projecting piece that covers the first through window,
The packaging box by which the identifier which shows the presence or absence of the said packaging target object in the said accommodation space is attached | subjected to the exposed part exposed from the said 1st penetration window in both the said protrusion piece and the said 1st flap.   The absence identifier which shows the absence of the said packaging target object in the said accommodation space is attached | subjected to the exposed part of the said protrusion piece exposed from the said 1st penetration window when the said protrusion piece is inserted in the said slit. Packaging box as described in.   Presence indicating the presence of the packaging object in the accommodation space at the exposed portion of the first flap exposed from the first through window when the first flap is bent and faces the inner surface side of the second side plate. The packaging box of Claim 1 or 2 to which the identifier is attached | subjected. A third side plate connecting both side ends of the first side plate and the second side plate;
A second through window penetrating the third side plate;
A second flap that is connected to the upper end of the third side plate and is foldable, and is bent to the inner surface side of the third side plate according to the presence or absence of the packaging object in the accommodation space to cover the second through window. And further comprising
The packaging box according to any one of claims 1 to 3, wherein a presence identifier indicating the presence of the packaging object in the accommodation space is attached to an exposed portion exposed from the second through window in the two flaps.   The presence identifier which shows presence of the said packaging target object in the said accommodation space is attached | subjected to the exposed part of the said protrusion piece exposed from the said 1st penetration window when the said protrusion piece is inserted in the said slit. Packaging box as described in.   Absence indicating the absence of the packaging object in the accommodation space at the exposed portion of the first flap exposed from the first through window when the first flap is bent and faces the inner surface side of the second side plate. The packaging box according to claim 1 or 5, wherein an identifier is attached.

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