Packing box

Abstract

To provide a packing carton that distinctively leaves marks of opening and makes it difficult to hide the marks of opening.SOLUTION: A packing carton 1 formed of corrugated cardboard has an inner lid part 41R and an outer lid part 21R folded at a folding part 64R to be laid over at least a part of the inner lid part 41R. The outer lid part 21R has: a fixation part 2a where a fixation member 2 for fixing the outer lid part 21R to the inner lid part 41R is arranged; a first cutting line Hm formed of a cut made from the reverse surface of the outer lid part 21R and not penetrating up to the top surface, the first cutting line HM being formed so that the fixation part 2a is encircled with the first cutting line Hm and the folding part 64R; and a second cutting line Hs formed of a cut made from the reverse surface of the outer lid part 21R and not penetrating up to the top surface, the second cutting line Hs being formed between an outer edge of the outer l id part 21R and the first cutting line Hm to extend from the outer edge 22 toward the side of the first cutting line Hm.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to a packaging box used for packaging an object to be packaged. Here, the packaging box is a box that contains an object to be packaged in order to guarantee the quality of the object from the time the object is packaged in the packaging box until the time the object is used and the packaging box is opened. [Background technology]

[0002] An example of an object to be packed in a packaging box to guarantee the quality is a cartridge used in an image forming apparatus. Image forming apparatuses include, for example, copying machines, printers (e.g., laser beam printers, LED printers, etc.), facsimile machines, and word processors. A cartridge is something that is detachable from the main body of an image forming apparatus. Examples of cartridges include a cartridge in which a photosensitive member as an image carrier and a process means such as a developing means acting on the photosensitive member are integrated into a cartridge, a cartridge in which substantially only the developing means are incorporated, and a cartridge in which substantially only the developer container is incorporated. The main body of an image forming apparatus corresponds to the portion of the image forming apparatus excluding the cartridge.

[0003] For example, an electrophotographic image forming apparatus (electrophotographic image forming apparatus) such as a printer using an electrophotographic process forms and outputs an image on a recording medium as follows. That is, a photoconductor (electrophotographic photoconductor) serving as an image carrier is uniformly charged, and the charged photoconductor is selectively exposed to light to form an electrostatic latent image on the photoconductor. The electrostatic latent image on the photoconductor is then developed with a developer to form a developer image on the photoconductor, and the developer image on the photoconductor is transferred onto a recording medium. Heat and pressure are then applied to the recording medium onto which the developer image has been transferred to fix the developer image to the recording medium, thereby recording an image on the recording medium.

[0004] Such image forming apparatuses often require the supply of developer and the maintenance of various process means. As a means for facilitating the supply of developer and the maintenance of various process means, the following cartridge system is available. For example, a process cartridge is constituted by assembling a photosensitive member and all or some of a charging means, a developing means, and a cleaning means as process means acting on the photosensitive member, in a frame body. Then, this process cartridge is made detachable from the main body of the image forming apparatus. In some cases, the developer cartridge is constituted by essentially forming only the developing means into a cartridge. In other cases, the developer cartridge (toner bottle) is constituted by essentially forming only the developer container into a cartridge.

[0005] According to this cartridge system, the user can replenish developer and perform maintenance of the device by replacing the cartridge, which can significantly improve operability. For this reason, the cartridge system is adopted in image forming devices, and it is common for the user to remove the cartridge from the main body of the image forming device and replace it with a new cartridge.

[0006] Here, new cartridges as packaged items shipped from a factory are often packed in a packaging box to guarantee their quality, etc. When mounting the new cartridge in the main body of the image forming apparatus, the user opens the packaging box, removes the new cartridge from the packaging box, and mounts it in the main body of the image forming apparatus.

[0007] In this way, it is desirable for cartridges to be packed in a packaging box to guarantee their quality, but there is a concern that the quality of the cartridges will decrease if the packaging box is tampered with. There is also a concern that packaging boxes will be reused and non-genuine cartridges will be sold as genuine products. An non-genuine cartridge here refers to a cartridge manufactured by manufacturer A that is sold by manufacturer B, falsely claiming to be from manufacturer A.

[0008] As a measure against tampering, a packaging box that leaves a trace of opening has been proposed. Patent Document 1 discloses the following configuration. That is, a tear pattern is drawn on the outermost flap of the packaging box with a perforation, and an adhesive is interposed between the tear pattern and the inner flap to fix the outermost flap and the inner flap. When an operation to open the outermost flap is performed, the tear pattern of the outermost flap falls off while still attached to the inner flap, leaving a trace of opening of the packaging box. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Patent No. 4332946 Summary of the Invention [Problem to be solved by the invention]

[0010] However, in the configuration of Patent Document 1, if the outermost flap is closed again and newly attached to the inner flap with adhesive, the fracture pattern will match the shape of the outermost flap from which the fracture pattern has fallen out, potentially making it easy to conceal traces of the opening of the packaging box.

[0011] In the above description, the packaged item is a cartridge such as a process cartridge in an image forming apparatus using an electrophotographic process, but other consumables in an image forming apparatus can also be packaged items. Examples include waste toner containers and belts such as intermediate transfer belts in an image forming apparatus using an electrophotographic process, and ink cartridges in an inkjet image forming apparatus. The packaged item is not limited to consumables in an image forming apparatus, and can include any product available on the market, including food, medicine, and quasi-drugs.

[0012] Therefore, an object of the present invention is to provide a packaging box that allows traces of opening to be left behind and makes it difficult to conceal the traces of opening. [Means for solving the problem]

[0013] The above object is achieved by a packaging box according to the present invention. In summary, the present invention provides a packaging box made of cardboard, the packaging box having an inner lid part arranged to close at least a part of an opening formed on one side of a box body capable of accommodating a packaged item, and an outer lid part folded at a folding part to be overlapped with at least a part of the surface of the inner lid part facing the outside of the packaging box, the outer lid part having a fixing part where a fixing member for fixing the outer lid part overlapped with the inner lid part to the inner lid part is arranged, a first cut line formed by a cut from a back surface, which is the surface of the outer lid part that faces the inner lid part when the outer lid part is overlapped with the inner lid part, and not penetrating to a front surface, which is the surface opposite to the back surface, the first cut line formed by the first cut line and the folding part so as to surround the fixing part, and a second cut line formed by a cut from the back surface, which does not penetrating to the front surface, and between an outer edge of the outer lid part and the first cut line Before First cut line side to reach the outer edge Extend The The packaging box is characterized by having two cut lines. Effect of the Invention

[0014] According to the present invention, it is possible to leave traces of the opening of a packaging box and make it difficult to conceal the traces of the opening. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic cross-sectional view of an image forming apparatus. [Diagram 2] FIG. 2 is a schematic cross-sectional view of a cartridge. [Diagram 3] FIG. 11 is a schematic cross-sectional view of a cardboard to explain cutting in half. [Figure 4] FIG. 2 is a plan view of the packaging box before assembly. [Diagram 5] FIG. 2 is a perspective view of the packaging box after assembly. [Figure 6] FIG. 2 is a perspective view of the packaging box for explaining a normal opening operation of the packaging box. [Figure 7] 1 is a side view of a proper opening portion for explaining a proper opening operation of a packaging box. FIG. [Figure 8] FIG. 11 is a perspective view of the packaging box during assembly. [Figure 9] FIG. 2 is a plan view of the right outer flap of the packaging box. [Figure 10] FIG. 13 is a plan view of the right outer flap of a packaging box showing another example of half-cutting. [Figure 11] FIG. 11 is a schematic perspective view for explaining an operation for opening the packaging box. [Figure 12] FIG. 11 is a schematic perspective view for explaining an operation for opening the packaging box. [Figure 13] 13 is a perspective view of a packaging box for explaining another arrangement mode of the secondary halves. FIG. [Figure 14] 13 is a schematic perspective view for explaining another example of the opening operation of the packaging box. FIG. [Figure 15] 13 is a perspective view of a packaging box for explaining still another arrangement mode of the secondary half-cut. FIG. [Figure 16] FIG. 11 is a schematic perspective view for explaining still another example of the opening operation of the packaging box. [Figure 17] FIG. 13 is a plan view of the right outer flap of another example of a packaging box. [Figure 18] FIG. 11 is a perspective view of another example of a packaging box after assembly. [Figure 19] FIG. 11 is a schematic perspective view for explaining an opening operation of a packaging box of another example. [Figure 20] FIG. 11 is a schematic cross-sectional view showing another example of cardboard. [Figure 21] 13 is a schematic diagram for explaining another example of the opening operation of the regular opening portion. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The packaging box according to the present invention will be described in more detail below with reference to the drawings.

[0017] [Example 1] An embodiment of a packaging box according to the present invention will be described. In this embodiment, a case where the object to be packed in the packaging box is a cartridge that is detachable from the main body of an image forming apparatus will be described as an example. First, the image forming apparatus and the cartridge as the object to be packed will be described, then the half cut provided in the packaging box will be described, and then the packaging box will be described.

[0018] 1. Image forming device Fig. 1 is a schematic cross-sectional view of an image forming apparatus 100 to which a cartridge P (PY, PM, PC, PK) as an article to be packed in a packaging box of this embodiment can be detachably attached. Fig. 2 is a schematic cross-sectional view of the cartridge P (PY, PM, PC, PK).

[0019] The image forming apparatus 100 is a full-color laser beam printer using an electrophotographic process, and employs a cartridge system. The image forming apparatus 100 has four cartridges (process cartridges) P (PY, PM, PC, PK) for forming images of each color, yellow (Y), magenta (M), cyan (C), and black (K), which are detachably attached to the apparatus main body 110. Elements having the same or corresponding functions or configurations provided for each color may be generally described by omitting the suffixes Y, M, C, and K of the reference numerals indicating that the elements are provided for any one of the colors. The apparatus main body 110 of the image forming apparatus 100 corresponds to the portion of the image forming apparatus 100 excluding the cartridges P.

[0020] The image forming apparatus 100 can form a full-color image on a recording medium (recording material, transfer material, sheet) S by removably mounting the cartridge P to the apparatus main body 110. Examples of the recording medium S include recording paper, label paper, OHP sheets, and cloth. The image forming apparatus 100 is configured by arranging first, second, third, and fourth cartridges PY, PM, PC, and PK in a row in a substantially horizontal direction inside the apparatus main body 110. The apparatus main body 100 has a laser scanner 103 as an optical unit, a primary transfer roller 106, an intermediate transfer belt 107, and a secondary transfer roller 108 as transfer units, a fixing device 109 as fixing unit, a feeding unit 111 as a feeding unit for the recording medium S, and the like.

[0021] The cartridge P is configured by connecting a drum unit 114 and a developing device (developing unit) 104 to each other. The cartridges P for each color have the same electrophotographic process mechanism, and the color of the toner used as the developer for development is different. The drum unit 114 has a photosensitive drum 101 (101Y, 101M, 101C, 101K) which is a rotatable drum-type electrophotographic photosensitive body as an image carrier. The drum unit 114 also has a charging roller 102 (102Y, 102M, 102C, 102K) as a charging means as a process means acting on the photosensitive drum 101. The drum unit 114 also has a cleaning blade 105 (105Y, 105M, 105C, 105K) as a cleaning means as a process means. The drum unit 114 is configured by supporting the photosensitive drum 101, the charging roller 102, the cleaning blade 105, and the like on a cleaning frame 151. On the other hand, the developing device 104 has a developing roller (developer carrier) 141 as a developing means, which is a process means acting on the photosensitive drum 101. The developing device 104 is configured such that the developing roller 141 and the like are supported by a developing frame 142. The first, second, third and fourth cartridges PY, PM, PC and PK each contain yellow, magenta, cyan and black toner in the developing frame 142, respectively.

[0022] The photosensitive drum 101 is driven to rotate in a counterclockwise direction in FIG. 1. The surface of the rotating photosensitive drum 101 is uniformly charged to a predetermined potential of a predetermined polarity (negative polarity in this embodiment) by the charging roller 102. During charging, a predetermined charging voltage is applied to the charging roller 102 by a voltage application means provided in the apparatus main body 110. The charged surface of the photosensitive drum 101 is irradiated with a laser beam L corresponding to image information corresponding to each cartridge P by the laser scanner 103 and scanned and exposed. As a result, an electrostatic latent image (electrostatic image) corresponding to the image information corresponding to each cartridge P is formed on the surface of the photosensitive drum 101. The electrostatic latent image formed on the photosensitive drum 101 is developed (visualized) by the supply of toner by the developing device 104, and a toner image (developer image) is formed on the surface of the photosensitive drum 101.

[0023] An intermediate transfer belt 107, which is an endless belt serving as an intermediate transfer body, is disposed so as to face the four cartridges P. The intermediate transfer belt 107 is stretched around a plurality of support rollers and is driven to rotate in a clockwise direction in FIG. 1. Primary transfer rollers 106Y, 106M, 106C, and 106K are disposed on the inner peripheral surface side of the intermediate transfer belt 107 in correspondence with the respective photosensitive drums 101Y, 101M, 101C, and 101K. The primary transfer roller 106 is urged toward the photosensitive drum 101 via the intermediate transfer belt 107, forming a primary transfer portion (primary transfer nip portion) where the photosensitive drum 101 and the intermediate transfer belt 107 come into contact with each other. The toner image formed on the photosensitive drum 101 is primarily transferred onto the intermediate transfer belt 107 at the primary transfer portion. During the primary transfer, a primary transfer voltage of a polarity opposite to the normal charging polarity (charging polarity during development) of the toner (positive polarity in this embodiment) is applied to the primary transfer roller 106. For example, when a full-color image is formed, the toner images of yellow, magenta, cyan and black formed on the photosensitive drums 101Y, 101M, 101C and 101K are sequentially primarily transferred onto the intermediate transfer belt 107 so as to be superimposed on each other.

[0024] On the other hand, the recording medium S is separated and fed one by one by the feeding unit 111 in synchronization with the formation of the toner image. On the outer peripheral surface side of the intermediate transfer belt 107, a secondary transfer roller 108 is arranged facing one of the multiple support rollers of the intermediate transfer belt 107. The secondary transfer roller 108 is urged toward the opposing support roller via the intermediate transfer belt 107, forming a secondary transfer portion (secondary transfer nip portion) where the intermediate transfer belt 107 and the secondary transfer roller 108 come into contact with each other. The recording medium S fed by the feeding unit 111 is transported to the secondary transfer portion and passed through the secondary transfer portion. The toner image formed on the intermediate transfer belt 107 is secondarily transferred onto the recording medium S in the secondary transfer portion. During the secondary transfer, a secondary transfer voltage of a polarity opposite to the normal charging polarity of the toner (charging polarity during development) (positive polarity in this embodiment) is applied to the secondary transfer roller 108.

[0025] The recording medium S onto which the toner image has been transferred is transported to a fixing device 109. The fixing device 109 applies heat and pressure to the recording medium S carrying the unfixed toner image, thereby fixing (melting and adhering) the toner image onto the recording medium S. This forms an image on the recording medium S. Thereafter, the recording medium S is transported by discharge rollers 112 and the like, and is discharged (output) to a discharge section 113.

[0026] Furthermore, toner remaining on the surface of the photosensitive drum 4 after the toner image is transferred to the intermediate transfer belt 107 (primary transfer residual toner) is removed from the surface of the photosensitive drum 101 by the cleaning blade 105 and collected in the cleaning frame 151. This cleans the surface of the photosensitive drum 101. The surface of the photosensitive drum 101 is then uniformly charged again by the charging roller 5, making it possible to form an image. Furthermore, toner remaining on the surface of the intermediate transfer belt 107 after the toner image is transferred to the recording medium S (secondary transfer residual toner) is removed from the surface of the intermediate transfer belt 107 and collected by an intermediate transfer body cleaning means (not shown).

[0027] 2. Cut in half The "half cut", which is a cut provided in the packaging box, will be described with reference to Fig. 3. Fig. 3 is a schematic cross-sectional view showing a cross section approximately perpendicular to the planar direction of a double-sided corrugated board 200 as an example of corrugated board. In this embodiment, the packaging box is formed using the double-sided corrugated board 200 as the corrugated board.

[0028] The surface of the cardboard facing the outside of the packaging box (here, simply referred to as the "outside") when the packaging box is assembled is referred to as the cardboard surface F. The surface of the cardboard facing the inside of the packaging box (here, simply referred to as the "inside") when the packaging box is assembled is referred to as the cardboard back surface R. The space between the cardboard surface F and the cardboard back surface R is referred to as the cardboard intermediate layer I. In the case of a double-sided cardboard 200 as shown in FIG. 3, the cardboard surface F is formed by the outer surface of the outer liner (cardboard) 201a. In the case of the double-sided cardboard 200, the cardboard back surface R is formed by the inner surface of the inner liner 201b. In the case of the double-sided cardboard 200, the cardboard intermediate layer I includes the part of the outer liner 201a that is inward from the cardboard surface F, the core (corrugated cardboard) 202 arranged between the inner surface of the outer liner 201a and the outer surface of the inner liner 201b, and the part outside the cardboard back surface R of the inner liner 201b.

[0029] The "half cut" refers to a cut made from the back surface R of the cardboard, which does not penetrate all the way to the front surface F of the cardboard. This "half cut", like the half cuts H1, H2, and H3 shown in FIG. 3, may or may not be made in the core 202 arranged in the middle layer I of the cardboard, and the depth of the cut does not matter. However, this "half cut" typically penetrates the inner liner 201b. In this case, peeling of the middle layer I of the cardboard, which is accompanied by breakage of the core 202 during the opening operation described below, is likely to occur, and it is easy to leave clear traces of the opening of the packaging box.

[0030] Here, the corrugated board is not limited to the double-sided corrugated board 200 as shown in FIG. 3. The corrugated board may be a multi-layered board having a structure in which a single-sided corrugated board is stacked on a double-sided corrugated board in order, such as a double-sided corrugated board (two-ply corrugated board) 200a as shown in FIG. 20(a) or a triple-sided corrugated board (three-ply corrugated board) 200b as shown in FIG. 20(b). In the case of a multi-layered corrugated board, the corrugated board surface F is formed by the outer surface of the outermost liner 201a. In addition, in the case of a multi-layered corrugated board, the corrugated board back surface R is formed by the inner surface of the innermost liner 201b. In addition, in the case of a multi-layered corrugated board, the corrugated board intermediate layer I includes the entire liner and core between the corrugated board surface F and the corrugated board back surface R. In addition, in the case of a multi-layered corrugated board, the definition of "half cut" is the same as that described above, and refers to a cut made from the corrugated board back surface R and stops without penetrating to the corrugated board surface F. This "half-cutting" does not matter whether or not a cut is made in the cores (202a, 202b, 202c) arranged in the intermediate layer I of the cardboard, or in liners (201c, 201d) other than the outermost and innermost liners 201a, 201b, and the depth of the cut. However, this "half-cutting" typically penetrates the innermost liner 201b, or penetrates one or more liners (201b, 201c, 201d) other than the outermost liner 201a. In this case, peeling of the intermediate layer I of the cardboard, which is accompanied by breakage of the cores 202 during the opening operation described below, becomes more likely to occur, and it becomes easier to leave clear traces of the opening of the packaging box.

[0031] In addition, unlike the above-mentioned "half cut," a cut that penetrates from the back surface R of the cardboard to the front surface F of the cardboard (or from the front surface F to the back surface R of the cardboard) is also called a "through cut."

[0032] 3. Packing box composition The overall configuration of the packaging box 1 of this embodiment will be described with reference to Fig. 4. Fig. 4 is a plan view of the packaging box 1 of this embodiment in the state of an unfolded flat plate (template) before assembly, as seen from the inside. The above-mentioned cartridge P as the packaged item is accommodated inside the packaging box 1 of this embodiment during transportation.

[0033] The packaging box 1 has a top panel 10, a back panel 20, a bottom panel 30, a front panel 40, and a joint panel 50. The top panel 10 and the back panel 20 are connected via a hinge portion (folded portion, crease portion) 61. The back panel 20 and the bottom panel 30 are connected via a hinge portion 63. The bottom panel 30 and the front panel 40 are connected via a hinge portion 65. The front panel 40 and the joint panel 50 are connected via a hinge portion 67.

[0034] The top panel 10 is connected to a right top inner flap 11R and a left top inner flap 11L via hinges 62R and 62L, respectively. The back panel 20 is connected to a right back outer flap 21R and a left back outer flap 21L via hinges 64R and 64L, respectively. The bottom panel 30 is connected to a right bottom inner flap 31R and a left bottom inner flap 31L via hinges 66R and 66L, respectively. The front panel 40 is connected to a right front inner flap 41R and a left front inner flap 41L via hinges 68R and 68L, respectively.

[0035] The packaging box 1 is formed by folding the top plate 10, the back plate 20, the bottom plate 30, the front plate 40, and the joint plate 50 from the flat plate state shown in FIG. 4 to form a box body that is a cylindrical body with a substantially rectangular cross section in this embodiment. The top plate 10, the back plate 20, the bottom plate 30, the front plate 40, and the joint plate 50 form the peripheral wall of the box body 1a. The opening 1b formed on the right and left sides of the box body 1a in FIG. 4 is closed by folding the flaps provided on the top plate 10, the back plate 20, the bottom plate 30, and the front plate 40, respectively. The cartridge P as the packaged object is accommodated in the space inside the closed box body 1a. In assembling the packaging box 1, a fixing member such as an adhesive is appropriately used as a fixing means. In this embodiment, a hot melt adhesive is used as the fixing member. However, the fixing member is not limited to the hot melt adhesive, and any available adhesive or pressure sensitive adhesive can be used, for example, double-sided tape may be used.

[0036] A method for assembling the packaging box 1 of this embodiment will be further described with reference to Figures 4 and 5. Figure 5 is a perspective view of the assembled packaging box 1 of this embodiment as viewed from the right outer flap 21R side.

[0037] First, from the flat plate state shown in Fig. 4, the top panel 10, the back panel 20, the bottom panel 30, the front panel 40, and the joint panel 50 are folded inward at approximately right angles at the hinge parts 61, 63, 65, and 67, respectively, and the overlapped top panel 10 and the joint panel 50 are bonded with a hot melt adhesive. In this embodiment, the top panel 10 and the joint panel 50 are overlapped so that the joint panel 50 is disposed on the inside and the top panel 10 is disposed on the outside. Next, the right top inner flap 11R, the right bottom inner flap 31R, the left top inner flap 11L, and the left bottom inner flap 31L are folded inward at approximately right angles at the hinge parts 62R, 66R, 62L, and 66L, respectively. Next, the right front inner flap 41R and the left front inner flap 41L are folded inward at approximately right angles at the hinge parts 68R and 68L, respectively. Then, the right outer flap 21R and the left outer flap 21L are folded inward at approximately right angles at the hinges 64R and 64L, respectively. Then, the overlapping right outer flap 21R and the right front inner flap 41R, and the overlapping left outer flap 21L and the left front inner flap 41L are bonded with hot melt adhesive 2. FIG. 5 shows a state in which the right outer flap 21R is closed and bonded to the right front inner flap 41R to assemble the packaging box 1. The right front inner flap 41R constitutes an inner lid portion arranged to close at least a part of the opening 1b formed on one side of the box body 1a capable of accommodating the packaged object. The right outer flap 21R is folded at the folding portion 64R to constitute an outer lid portion that is overlapped with at least a part of the surface of the right front inner flap 41R facing the outside of the packaging box 1. A more detailed configuration of the right outer flap 21R and the like will be described later.

[0038] The shape of the packaging box 1 in this embodiment is merely an example, and the present invention is not limited to this shape. For example, the number of sides of the peripheral walls forming the box body 1a is not limited to four, but may be three, or five or more. It can be appropriately selected to suit the packaged item.

[0039] 4. Genuine opening In this embodiment, the packaging box 1 is configured to prevent deterioration of the quality of the cartridge P due to leaving traces of tampering, or to prevent the tampered packaging box 1 from being reused to sell an unauthorized cartridge P as a genuine product. In this embodiment, it is assumed that the tampering of the packaging box 1 is caused by opening the packaging box 1 in order to remove the cartridge P from a location other than the location designated by the manufacturer of the genuine product as the authorized opening location.

[0040] First, the normal opening of the packaging box 1 of this embodiment will be described. Fig. 6 is a perspective view of the packaging box 1 in a state where the top panel 10 is raised from the assembled state shown in Fig. 5 and the packaging box 1 is opened, as viewed from the right outer flap 21R side. Fig. 7(a) is a side view of the packaging box 1 in the assembled state shown in Fig. 5, as viewed from the direction of arrow A in Fig. 5. Fig. 7(b) is a side view of the packaging box 1 in a state where the top panel 10 is raised from the assembled state shown in Fig. 6 and the packaging box 1 is opened, as viewed from the direction of arrow B in Fig. 6.

[0041] In this embodiment, the top panel 10 of the packaging box 1 is configured as a regular opening portion. That is, in this embodiment, as shown in FIG. 6, the top panel 10 is raised, and the joining plate 50 to which the top panel 10 is superimposed and bonded is raised to open an opening, through which the cartridge P as the packaged article can be removed. As shown in FIG. 7(a), in this embodiment, the top panel 10 is provided with a gripping notch 11 for an operator to grip during a regular opening operation. In this embodiment, the gripping notch 11 is formed in a substantially arc shape from an outer edge 10E extending in a direction along (substantially parallel in this embodiment) the hinge portion 61 of the top panel 10 toward the hinge portion 61 side. In this embodiment, the gripping notch 11 is provided adjacent to a breakage figure 12 described later. Furthermore, a guide display 15 for guiding an opening operation may be provided on the outer surface of the top panel 10 by appropriate means such as printing. The guide mark 15 may be a graphic (such as an arrow) indicating the opening direction as shown in the figure, or may be a letter indicating the opening method. In this manner, in this embodiment, the gripping notch 11 and the guide mark 15 allow the operator to know that the top panel 10 is the correct opening location. Note that, as long as it is possible to know that the top panel 10 is the correct opening location, the guide mark may be provided, for example, in a location other than the top panel 10.

[0042] As shown in FIG. 7(a), the top panel 10 is drawn with a tear-off pattern 12 formed by a perforation line. In this embodiment, the tear-off pattern 12 has a start point 12a and an end point 12b, which are two ends arranged on the outer edge 10E of the top panel 10, and extends from the start point 12a and is connected at the end point 12b. In this embodiment, the tear-off pattern 12 is a substantially rectangular shape in a plan view having two sides that extend in a direction intersecting (substantially perpendicular in this embodiment) the outer edge 10E and one side that extends in a direction along (substantially parallel in this embodiment) the outer edge 10E. Here, the perforation line is a line formed by alternatingly repeating a tear-off pattern and a discontinuous portion without a tear-off pattern, and it is sufficient that the tear-off pattern can be guided so that the tear-off pattern falls out by a normal opening operation described later. The start point 12a and end point 12b of the breakage pattern 12 may each be either a through cut of a perforation line or a discontinuous portion.

[0043] The inner surface of the top panel 10 in the area surrounded by the breakage pattern 12 and the outer edge 10E is adhered to the outer surface of the joining plate 50 with a hot melt adhesive, so that the top panel 10 is fixed to the joining plate 50. In this embodiment, a tamper-proof seal 13 is attached to the outer surface of the top panel 10 so as to straddle the breakage pattern 12 (particularly, in this embodiment, the side extending in the direction along the outer edge 10E). In this embodiment, the tamper-proof seal 13 is one that is destroyed by breaking or the like so as to be difficult to repair when the breakage pattern 12 is broken by a normal opening operation described later. As the tamper-proof seal 13, a publicly known one can be appropriately selected and used. For example, as the tamper-proof seal 13, one can be used that is not easily peeled off from the adhesive surface but is relatively easily broken when a force is applied in a direction across the adhesive surface. Also, instead of or in addition to being destroyed by breaking, the tamper-evident seal 13 may be destroyed such that the seal surface and the adhesive surface are peeled off, destroying the design applied to the seal in a manner that is difficult to repair. Here, the tamper-evident seal 13 will be described as typically being broken.

[0044] When opening the packaging box 1 from the proper opening portion, the operator grasps the gripping notch 11 or the outer edge 10E adjacent to the breaking pattern 12 from the state shown in Fig. 5 and Fig. 7(a), and applies force in a direction to move the top panel 10 away from the joining plate 50 to perform an opening operation. As a result, when the top panel 10 is raised as shown in Fig. 6 and Fig. 7(b), the breaking pattern 12 of the top panel 10 is broken, and the breaking piece 14 falls while being fixed to the joining plate 50. When the breaking pattern 12 is broken, the tamper-proof seal 13 affixed so as to straddle the breaking line 12 is also broken, and the breaking seal pieces 13a, 13b remain on the breaking piece 14 and the top panel 10, respectively. After that, the operator raises the joining plate 50, and the cartridge P can be taken out from the opening thus opened.

[0045] In this way, when the packing box 1 of this embodiment is properly opened at the top panel 10, which is the proper opening portion, the broken pieces 14 that have fallen off the top panel 10 remain attached to the joint plate 50, and the tamper-proof seal 13 is broken. Once broken, the tamper-proof seal 13 is difficult to repair, and when the broken seal pieces 13a and 13b are peeled off, the cardboard surface F that constitutes the outer surface of the top panel 10 is peeled off, leaving a trace. As described above, the tamper-proof seal 13 may leave a trace of opening by destroying the design due to peeling between the seal surface and the adhesive surface, in addition to breaking. As a result, the packing box 1 of this embodiment is designed to leave a trace of a proper opening operation. In FIG. 7(b), the broken portion of the broken seal piece is drawn in a straight line, but this is not limited to this. For example, multiple complementary convex and concave portions may be formed between the broken seal pieces 13a, 13b, making repair more difficult.

[0046] Here, the configuration for leaving a trace of a proper opening operation is not limited to the configuration of the present embodiment. FIG. 21 is a schematic diagram showing another example of the configuration for leaving a trace of a proper opening operation. For example, instead of or in addition to the tamper-proof seal that leaves a trace by breaking as described above, a known tamper-proof seal 16 that appears when peeled off (remains on the attached surface without peeling off) as shown in FIG. 21(a) may be used. Also, as shown in FIG. 21(b), a configuration may be used using an opening strip 18 that divides the top surface first portion 10a that is fixed to the joining plate 50 of the top panel 10 with the adhesive 2 and the top surface second portion 10b that is not fixed. This opening strip 18 can be formed by drawing a perforated line-shaped breaking pattern 17 that alternates between a through cut and a discontinuous portion without a through cut, for example, along the outer edge 10E of the top panel 10. The packaging box 1 can be opened by removing the opening strip 18 by pulling it up from one end in the longitudinal direction, standing up the second top portion 10b, and standing up the first top portion 10a together with the joint plate 50.

[0047] 5. Construction of the right dorsolateral flap Next, a configuration for leaving traces of tampering (herein also simply referred to as "traces of opening") of the packaging box 1 in this embodiment will be described. As described above, the packaging box 1 in this embodiment is configured so that when a proper opening operation is performed on the top panel 10, which is the proper opening part, a trace of the proper opening operation is left behind. For this reason, when an attempt is made to tamper with the packaging box 1 in order to reuse the packaging box 1, for example, it is assumed that an attempt is made to open the right outer flap 21R as a part other than the proper opening part. Therefore, in this embodiment, a configuration for leaving traces of tampering of the packaging box 1 is provided on the right outer flap 21R.

[0048] Fig. 8 is a perspective view of the packaging box 1 of this embodiment, seen from the right outer flap 21R side, before the right outer flap 21R is closed. Fig. 9 is a plan view of the right outer flap 21R of the packaging box 1 of this embodiment, seen from the inside. Here, the entire edge of the right outer flap 21R is defined as the outer edge 22. The edge of the outer edge 22 extending in a direction along the hinge portion 64R (approximately parallel in this embodiment) is defined as the tip edge (tip edge) 22a, and the two edges extending in a direction intersecting the hinge portion 64R (approximately perpendicular in this embodiment) at both ends of the tip edge 22a are defined as side end edges (side edges) 22b.

[0049] The right outer flap 21R is formed with the first cut line, the main cut Hm, and the second cut line, the sub-cut Hs (Hs1, Hs2, Hs3, Hs4, Hs5, Hs6, Hs7), by the "half cut" described above. The main cut Hm and the sub-cut Hs guide the peeling of the middle layer I of the cardboard during the opening operation described below.

[0050] In this embodiment, the main half Hm is formed roughly inside the contour of the outer edge 22 in a shape roughly similar to this contour. That is, in this embodiment, the main half Hm has a first main half (first portion) Hm1 that is adjacent to the tip edge 22a at a predetermined interval and extends in a direction along (roughly parallel in this embodiment) the hinge portion 64R. Also, in this embodiment, the main half Hm has two second main half (second portions) Hm2 that are adjacent to each of the two side edge portions 22b at a predetermined interval and extend in a direction intersecting (roughly perpendicular in this embodiment) the hinge portion 64R. Record number The predetermined interval between the first main half-cut Hm1 and the tip edge 22a, and between the second main half-cut Hm2 and the side edge 2b, is, for example, about 0.5 cm or more and 3 cm or less. If this interval is too small, processing may become difficult, and peeling, which will be described later, may not start easily. If this interval is too large, the distance between the outer edge 22 and the fixing part 2, which will be described later, becomes too large, and bending of the right back outer flap 21R due to the half-cutting may easily occur, for example, during handling of the packaging box 1.

[0051] Both ends of the first main half Hm1 are adjacent to one end of the second main half Hm2. In this embodiment, both ends of the first main half Hm1 are in contact with one end of the second main half Hm2. From the viewpoint of facilitating the peeling of the intermediate layer I of the cardboard by the opening operation described later, it is preferable that they are in contact with each other. However, there may be a gap between at least one of the ends of the first main half Hm1 and one end of the second main half Hm2. The end of the second main half Hm2 adjacent to the hinge portion 64R on one side (upper in FIG. 9) is the starting point Hma of the main half Hm, and the end of the second main half Hm2 adjacent to the hinge portion 64R on the other side (lower in FIG. 9) is the ending point Hmb of the main half Hm. In this embodiment, the starting point Hma and the ending point Hmb of the main half Hm are in contact with the hinge portion 64R. From the viewpoint of facilitating separation of the flap piece 3 (FIG. 11, etc.) during an opening operation described later, it is preferable that they are in contact with each other. However, there may be a gap between at least one of the starting point Hma and the ending point Hmb of the main half cut Hm and the hinge portion 64R.

[0052] In the region surrounded by the main half Hm and the hinge portion 64R, a fixing portion (adhesive portion) 2a is provided to which adhesive 2, which in this embodiment is a hot melt adhesive, is applied. That is, in this embodiment, the main half Hm extends from a starting point Hma on the hinge portion 64R, surrounds the adhesive 2, and is connected at an end point Hmb on the hinge portion 64R different from the starting point Hma. Thus, in this embodiment, the main half Hm has two end portions Hma and Hmb adjacent to the hinge portion 64R, and is formed so as to surround the fixing portion 2a by the main half Hm and the hinge portion 64R.

[0053] The minor half-cuts Hs (Hs1, Hs2, Hs3, Hs4, Hs5, Hs6, Hs7) extend from the adjacent portion with the outer edge 22 to the adjacent portion with the main half-cut Hm. In this embodiment, the minor half-cuts Hs are provided with two minor half-cuts Hs1 and Hs2 that extend from the adjacent portion with one side edge 22b (upper side in FIG. 9) to the adjacent portion with the second main half-cut Hm2 on the side edge 22b side. In this embodiment, the minor half-cuts Hs are provided with three minor half-cuts Hs3, Hs4, and Hs5 that extend from the adjacent portion with the tip edge 22a to the adjacent portion with the first main half-cut Hm1. In this embodiment, the minor half-cuts Hs are provided with two minor half-cuts Hs6 and Hs7 that extend from the adjacent portion with the other side edge 22b (lower side in FIG. 9) to the adjacent portion with the second main half-cut Hm2 on the side edge 22b side. In this embodiment, the end of each minor half Hs on the outer edge 22 side and the end on the main half Hm side are in contact with the outer edge 22 and the main half Hm, respectively. From the viewpoint of facilitating the peeling of the intermediate layer I of the cardboard during the opening operation described below, it is preferable that these are in contact. However, there may be a gap between at least one of the end of each minor half Hs on the outer edge 22 side and the end on the main half Hm side and the outer edge 22 or the main half Hm.

[0054] In this embodiment, the minor halves Hs2 and Hs3 are in contact with the adjacent portions (contact portions in this embodiment) between the ends of the first main half Hm1 and the second main half Hm2. Similarly, in this embodiment, the minor halves Hs5 and Hs6 are in contact with the adjacent portions (contact portions in this embodiment) between the ends of the first main half Hm1 and the second main half Hm2. In this embodiment, the minor halves Hs4 are located at approximately the center in the length direction of the first main half Hm1 (approximately the center of the right back outer flap 21R in the direction along the hinge portion 64R). In this embodiment, the minor halves Hs1 and Hs7 are located at approximately the center in the length direction of the second main half Hm2 (approximately the center of the right back outer flap 21R in the direction approximately perpendicular to the hinge portion 64R).

[0055] The shapes of the main half cut Hm and the sub half cut Hs in this embodiment are only examples, and the present invention is not limited to these shapes. For example, as shown in FIG. 10, the main half cut Hm (at least one of the first main half cut Hm1 and the second main half cut Hm2) may be a discontinuous main half cut HmF having a discontinuous part G, which is a part where no cut (blade) is made, on its line. Similarly, as shown in FIG. 10, at least one of the sub half cuts Hs may be a discontinuous sub half cut HsF having a discontinuous part G on its line. The main half cut Hm and the sub half cut Hs may be configured so that the right back outer flap 21R is destroyed by the opening operation as described later, and more typically, the flap piece 3 (FIG. 11, etc.) is separated from the packaging box 1, leaving a trace of the opening of the packaging box 1. The shapes of the discontinuous main half cut HmF and the discontinuous sub half cut HsF shown in FIG. 10 are only examples, and the present invention is not limited to these shapes. For example, the number and length of the discontinuous portions G are not limited to those shown in the illustrated example, and at least one of the discontinuous main half-cuts HmF and the discontinuous minor half-cuts HsF may be formed in the shape of a perforation line.

[0056] As described above, there may be a gap between the end of the first main half-cut Hm1 and the end of the second main half-cut Hm2, between the start point Hma or end point Hmb of the main half-cut Hm and the hinge portion 64R, or between the end of the minor half-cut Hs and the outer edge 22 or the main half-cut Hm. It is preferable that the above-mentioned parts are in contact with each other with a gap of 0 mm, but even if there is a gap of, for example, 5 mm or less (typically 1 mm or more) unintentionally or intentionally due to manufacturing reasons, there is no problem from the viewpoint of leaving a trace of opening as described later. In other words, the adjacent part between the above-mentioned parts includes a case where the gap is 0 mm and a case where the parts face each other with a gap as described above. In addition, when the above-mentioned discontinuous part G is provided in the main half-cut Hm, it is preferable that the total length of the discontinuous part G is about 1 / 3 or less of the total length of the main half-cut Hm (the first main half-cut Hm1 and the second main half-cut Hm2) from the viewpoint of leaving a trace of opening as described later. Similarly, when providing each of the minor halves Hs with the above-mentioned discontinuous portions G, it is desirable to make the total length of the discontinuous portions G approximately 1 / 3 or less of the total length of each of the minor halves Hs, from the viewpoint of leaving traces of opening as described below. However, it is desirable to make the length of one discontinuous portion G approximately 5 mm or less (typically 1 mm or more), for example, as in the case of the gap.

[0057] Here, the fixing portion 2a to which the adhesive 2 is applied may be provided within the area surrounded by the main half cut Hm and the hinge portion 64R. This allows the operator to clearly leave a trace of the opening of the packaging box 1 whether he / she grips the leading edge 22a to open the right outer flap 21R or grips the side edge 22b to open the right outer flap 21R. However, in this embodiment, it is typically assumed that the operator grips the leading edge 22a to open the right outer flap 21R. In this case, it is preferable that the fixing portion 2a is located closer to the first main half cut Hm1 (the main half cut adjacent to the leading edge 22a and extending in the direction along the hinge portion 64R) than the hinge portion 64R in the direction substantially perpendicular to the hinge portion 64R of the right outer flap 21R. For example, the fixing portion 2a can be provided adjacent to the first main half-cut Hm1 at a distance of 0.5 cm or more and 3 cm or less. This makes it easier for an operator to grasp the leading edge 22a and open the right back outer flap 21R, and to clearly leave a trace of the opening of the packaging box 1 by inducing peeling or the like described later. In addition, it is desirable that the fixing portion 2a is provided in a sufficient range in the length direction of the first main half-cut Hm1 so that sufficient fixing strength is obtained. For example, the fixing portion 2a is preferably provided in a length of 70 to 100% of the length of the first main half-cut Hm1 in the length direction of the first main half-cut Hm1. However, the fixing portion 2a is not limited to being provided continuously within the above length range, and may be provided discontinuously within the above length range so that sufficient fixing strength is obtained. In addition, in consideration of the case where an operator attempts to open the right outer flap 21R by grasping the side edge 22b, an alternative or additional fastening portion 2a can be provided for at least one of the second main half-cuts Hm2 in a setting similar to that for the first main half-cut Hm1.

[0058] In this embodiment, the configuration for leaving a trace of opening of the packaging box 1 according to the present invention (main half cut Hm, secondary half cut Hs, etc.) is provided on the right outer flap 21R, but the present invention is not limited to this embodiment. For example, if it is assumed that the left outer flap 21L will be opened as a part other than the regular opening part, the configuration for leaving a trace of opening of the packaging box 1 according to the present invention may be provided on the left outer flap 21L. Also, the configuration for leaving a trace of opening of the packaging box 1 according to the present invention may be provided on both the right outer flap 21R and the left outer flap 21L.

[0059] 6. Open the outer right flap Next, the opening of the right outer flap 21R in the packaging box 1 of this embodiment will be described. Fig. 11 is a perspective view of the packaging box 1 showing an example of a state in which traces of opening remain due to an opening operation of the right outer flap 21R. Please also refer to Fig. 9 for details of the main half cut Hm, the sub half cut Hs, the fixing part 2a, etc. provided on the right outer flap 21R.

[0060] When opening the right outer flap 21R, the operator grasps the outer edge 22 (typically the leading edge 22a) of the right outer flap 21R that is not bonded to the right front inner flap 41R by the adhesive 2. Then, the operator applies force in a direction to move the right outer flap 21R away from the right front inner flap 41R to perform the opening operation. This opening operation applies force to the cardboard surface F and the middle layer I of the part where the half cuts (main half cut Hm, secondary half cut Hs) of the right outer flap 21R are provided, depending on the operator's gripping position, as will be described in detail later. This causes peeling of the middle layer I between the cardboard surface F of the right outer flap 21R and the cardboard back surface R (typically breakage of the core 202 of the middle layer I), or interlayer peeling of the liner such as the paperboard (outer liner 201a) that constitutes the cardboard surface F. Here, both of these are simply referred to as "peeling". In addition, as described later in detail, depending on the gripping position of the operator, the right outer flap 21R is likely to be torn off from the portion where the half cut (mainly the sub-half cut Hs) is provided. Then, as the operator continues the opening operation, typically the flap piece 3 is separated from the right outer flap 21R, accompanied by the above peeling and separation, as shown in FIG. 11 for example. As a result, typically the flap piece 3 is separated, or even if the flap piece 3 is not completely separated, the right outer flap 21R is destroyed by the above peeling in a manner that is difficult to repair, and a trace of opening of the packaging box 1 is clearly left. In this way, when the flap is destroyed by peeling and typically the flap piece is separated from the flap, the trace of opening is difficult to determine depending on the starting position of opening and the way the force is applied during opening. In addition, it is difficult to return the trace of opening, which is typically left by breaking the core 202 of the corrugated board intermediate layer I, to the state before opening by, for example, gluing. Therefore, it becomes difficult to hide the trace of opening of the packaging box 1.

[0061] The opening operation of the right outer flap 21R will be described in more detail. FIG. 11 is a perspective view that shows a schematic diagram of the packaging box 1 with traces of opening when the operator's gripping position is the leading edge 22a above the approximate center in the vertical direction in FIG. 11 (for example, a position closer to the center than the upper end). In this case, the operator grips the leading edge 22a above the approximate center in the vertical direction in FIG. 11, which is not bonded to the right front inner flap 41R with the adhesive 2, and starts the opening operation to pull the right outer flap 21R away from the right front inner flap 41R. At the approximate center in the vertical direction in FIG. 11 of the right outer flap 21R, a secondary half cut Hs4 is provided between the leading edge 22a and the first main half cut Hm1. Therefore, when the operator grips the gripping position and starts the opening operation, the right outer flap 21R is easily divided into the upper and lower parts in FIG. 11 starting from this secondary half cut Hs4. Note that, although a typical example is described here, even in the case of the arrangement of the minor half cut Hs of this embodiment, the right outer flap 21R may not be divided into the top and bottom in FIG. 11 depending on the operator's gripping position and the way force is applied (see FIG. 16(a)). Then, when the right outer flap 21R near the upper tip edge 22a in FIG. 11 that the operator is gripping is rolled up to the vicinity of the first main half cut Hm1, force is applied to the cardboard surface F and middle layer I of the part where the first main half cut Hm1 of the right outer flap 21R is provided. In addition, at the upper end side of the right outer flap 21R in FIG. 11, a minor half cut Hs2 is provided so as to be continuous with the first main half cut Hm1, and force is also applied to the cardboard surface F and middle layer I of the part where this minor half cut Hs2 is provided. As a result, the right outer flap 21R is peeled off from the first main half-cut Hm1 and the second half-cut Hs2, which are above the approximate center in the vertical direction in Fig. 11. If the operator continues to open the right outer flap 21R while this peeling occurs, typically, the part of the right outer flap 21R that the operator is holding separates from the remaining part 4 as the flap piece 3. At this time, the flap piece 3 separates from the remaining part 4 in the vicinity of the hinge part 64R as shown in Fig. 11, or separates from the remaining part 4 by being peeled off just before the hinge part 64.This typically results in the flap piece 3 separating, or even if the flap piece 3 does not separate completely, the right outer flap 21R is destroyed in a manner that is difficult to repair due to the peeling, leaving clear evidence that the packaging box 1 has been opened.

[0062] If the operator continues to open the packaging box 1 and wants to remove the cartridge P from the packaging box 1, the operator must open the right outer flap 2 in the same manner as described above. 1 The lower portion of R in FIG. 11 is also opened, and the remainder 4 is peeled off from the right front inner flap 41R, and the right front inner flap 41R is opened.

[0063] In this embodiment, the right outer flap 21R is provided with a main half cut Hm and a secondary half cut Hs that are approximately symmetrical with respect to approximately the center in the vertical direction in Fig. 11. Therefore, when the operator's gripping position is at the leading edge 22a below approximately the center in the vertical direction in Fig. 11 (for example, a position closer to the center than the lower end), the opening trace will be the same as in Fig. 11, although upside down. Also, when the operator's gripping position is approximately the center in the vertical direction in Fig. 11, the top and bottom are likely to be separated from each other starting from the secondary half cut Hs4 when trying to lift the right outer flap 21R against the adhesive force of the adhesive 2, and the opening trace will often be the same as in Fig. 11.

[0064] Next, FIG. 12 is a perspective view showing a packaging box 1 with traces of opening when the operator's gripping position is the upper side edge 22b in FIG. 12 (for example, a position closer to the tip edge 22a than the left-right center). In this case, the operator grips the upper side edge 22b in FIG. 12 (for example, a position closer to the tip edge 22a than the left-right center) that is not bonded to the right front inner flap 41R with the adhesive 2, and starts the opening operation to pull the right outer flap 21R away from the right front inner flap 41R. Between the upper side edge 22b in FIG. 12 of the right outer flap 21R and the second main half cut Hm2, a secondary half cut Hs1 is provided at approximately the center in the left-right direction. Therefore, when the operator grips the gripping position and starts the opening operation, the right outer flap 21R is easily divided into the left and right in FIG. 12 starting from this secondary half cut Hs1. 12. The right outer flap 21R in the vicinity of the upper side edge 22b in FIG. but 12. When the right outer flap 21R is rolled up to the vicinity of the second main half cut Hm2, a force is applied to the cardboard surface F and the middle layer I of the part where the second main half cut Hm2 of the right outer flap 21R is provided. In addition, a secondary half cut Hs3 is provided on the left end side of the right outer flap 21R in FIG. 12 so as to be continuous with the second main half cut Hm2, and a force is also applied to the cardboard surface F and the middle layer I of the part where the secondary half cut Hs3 is provided. As a result, the above-mentioned peeling occurs in the right outer flap 21R from the part of the second main half cut Hm2 and the secondary half cut Hs3 on the left side of approximately the center in the left-right direction in FIG. 12. Then, when the operator continues the opening operation of the right outer flap 21R while this peeling occurs, typically the part of the right outer flap 21R that the operator is holding is separated from the remaining part 4 as the flap piece 3. At this time, the flap piece 3 may be separated from the remaining part 4 near the hinge part 64R as shown in Fig. 12, or may be peeled off before the hinge part 64 and be separated from the remaining part 4. As a result, typically, the flap piece 3 is separated, or even if the flap piece 3 is not completely separated, the right outer flap 21R is destroyed in a manner that is difficult to repair due to the peeling, and clear evidence that the packaging box 1 has been opened remains.

[0065] In this embodiment, the right outer flap 21R is provided with a main half cut Hm and a secondary half cut Hs that are approximately symmetrical with respect to the approximate center in the vertical direction in Fig. 12. Therefore, when the operator's gripping position is the lower side edge 22b in Fig. 12 (for example, a position closer to the tip edge 22a than the left-right center), the opening trace will be the same as in Fig. 12, although the top and bottom are reversed. Also, when the operator's gripping position is approximately the center in the horizontal direction of the upper (or lower) side edge 22b in Fig. 12, separation into the left and right sides is likely to occur starting from the secondary half cut Hs1 (or Hs7) when attempting to lift the right outer flap 21R against the adhesive force of the adhesive 2, and the opening trace will often be the same as in Fig. 12.

[0066] In addition, it is sufficient that at least one of the minor half cuts Hs extends from an adjacent portion (typically a contact portion) with the outer edge 22 to an adjacent portion (typically a contact portion) with the main half cut Hm. This makes it easy for the minor half cut Hs to cooperate with the main half cut Hm to induce the above-mentioned peeling or separation, and to leave clear traces of the opening of the packaging box 1.

[0067] However, it may be preferable that at least one of the minor half cuts Hs is arranged so as to be continuous with the main half cut Hm in the length direction of the main half cut Hm and extends to the outer edge 22. For example, assuming that an operator grasps the leading edge 22a to open the right back outer flap 21R, it is preferable that at least one of the minor half cuts Hs2 and Hs6 continuing from the first main half cut Hm1 is provided (both are more preferable). This makes it easier to cause the above-mentioned peeling to occur starting from the first main half cut Hm1 and the minor half cuts Hs2 and Hs6 continuing therefrom and extending to the outer edge 22 of the right back outer flap 21R. Also, assuming that an operator grasps the side edge 22b to open the right back outer flap 21R, it is preferable that at least one of the minor half cuts Hs3 and Hs5 continuing from the second main half cut Hm2 is provided (both are more preferable). This makes it easier for the above-mentioned peeling to occur starting from the second main half-cut Hm2 and the minor half-cuts Hs3 and Hs6 that are continuous with the second main half-cut Hm2 and extend to the outer edge 22 of the right outer back flap 21R.

[0068] Depending on the length of the outer edge 22 that the operator can grasp, it may be preferable to provide a sub-half cut Hs between the outer edge 22 and the main half cut Hm, closer to the center than the end of the main half cut Hm adjacent to the outer edge 22 in the longitudinal direction. For example, assuming that the operator grasps the leading edge 22a to open the right back outer flap 21R, it is preferable to provide the sub-half cut Hs4 when the leading edge 22a is relatively long. This makes it possible to divide the part that causes the above-mentioned peeling in the middle of the length of the first main half cut Hm1, and to prevent the force required to cause the peeling from being greater than the force required to peel off the fixed part by the adhesive 2. This makes it easy to leave a trace of the opening due to the peeling. In addition to the sub-half cut Hs4 at approximately the center of the length of the first main half cut Hm1, one or more sub-half cuts may be additionally provided at one end side or both end sides in the longitudinal direction of the first main half cut Hm1. For example, three (five if both ends are included) minor halves Hs may be provided extending from the tip edge 22a to the first main half-cut Hm1 so as to divide the length of the first main half-cut Hm1 into four (typically, equal parts). In addition, the arrangement is not limited to providing the minor halves Hs4 in the approximate center of the length of the first main half-cut Hm1. For example, two (four if both ends are included) minor halves Hs may be provided extending from the tip edge 22a to the first main half-cut Hm1 so as to divide the length of the first main half-cut Hm1 into three (typically, equal parts).

[0069] Also, assuming that an operator grasps the side edge 22b to open the right back outer flap 21R, it is preferable to provide at least one of the minor half cuts Hs1 and Hs7 when the side edge 22b is relatively long. This makes it possible to divide the portion causing the above-mentioned peeling in the middle of the length of the second main half cut Hm2, and to prevent the force required to cause the peeling from being greater than the force required to peel off the portion fixed by the adhesive 2. This makes it easy to leave a trace of the opening caused by the peeling. In addition to the minor half cut Hs1 (or Hs7) at approximately the center of the length of the second main half cut Hm2, one or more minor half cuts may be additionally provided at one end side or both end sides in the length direction of each second main half cut Hm2. For example, three (four if the end part is included) minor halves Hs may be provided extending from the side edge 22b to the second main half-cut Hm2 so as to divide the length of the second main half-cut Hm2 into four (typically, evenly divided into four). In addition, it is not limited to providing the minor halves Hs1 (or Hs7) at approximately the center in the length of the second main half-cut Hm2. For example, two (three if the end part is included) minor halves Hs may be provided extending from the side edge 22b to the second main half-cut Hm2 so as to divide the length of the second main half-cut Hm2 into three (typically, evenly divided into three).

[0070] In particular, according to the arrangement of the secondary half-cut Hs of this embodiment shown in Figure 9, whether the operator grasps the tip edge 22a or the side edge 22b to open the right outer flap 21R, it is easy to leave clear traces of the opening of the packaging box 1.

[0071] 7. Other arrangements of the secondary half-cut Below, some examples of other arrangements of the secondary half-cut Hs will be described. Except for the arrangement of the secondary half-cut Hs, the configuration of the packaging box 1 is the same as that shown in FIG.

[0072] FIG. 13 is a perspective view of the packaging box 1 in a state before the right outer flap 21R is closed, when only the minor half-cut Hs2 continuous with the upper end of the first main half-cut Hm1 in FIG. 13 is provided as the minor half-cut Hs, as seen from the right outer flap 21R side. FIG. 14 is a perspective view of the packaging box 1, which shows a schematic example of a state in which traces of opening are left by an opening operation of the right outer flap 21R of the packaging box 1 shown in FIG. 13. FIG. 14(a) shows an example in which the operator's gripping position is the region D in FIG. 13, and FIGS. 14(b) and (c) show an example in which the operator's gripping position is the region E in FIG. 13. The region D is the leading edge 22a or the side edge 22b opposite to the side where the minor half-cut Hs2 is provided. The region E is the side edge 22b on the side where the minor half-cut Hs2 is provided.

[0073] As shown in FIG. 14(a), when the operator starts the opening operation from the leading edge 22a of the region D, a force is applied to the middle layer I of the cardboard at the first main half cut Hm1 and the secondary half cut Hs2, and peeling starts. Also, on the side edge 22b side where the secondary half cut Hs2 is not provided, peeling progresses along the second main half cut Hm2. Also, when the operator starts the opening operation from the side edge 22b of the region D, a force is applied to the middle layer I of the cardboard at the second main half cut Hm2 and the first main half cut Hm1 where the secondary half cut Hs2 is not provided, and peeling starts. Also, peeling progresses along the first main half cut Hm1. As a result, as shown in FIG. 14(a), the right back outer flap 21R is separated into the flap piece 3 and the remaining part 4, and is destroyed in a manner that is difficult to repair.

[0074] Also, as shown in FIG. 14(b), when the operator performs the opening operation from the area E, a force is applied to the middle layer I of the cardboard at the second main half cut Hm2 on the side where the secondary half cut Hs2 is provided, and peeling starts. Also, peeling progresses along the first main half cut Hm1 and the second main half cut Hm2 on the side where the secondary half cut Hs2 is not provided. As a result, the right spine outer flap 21R is separated into the flap piece 3 and the remaining part 4 as shown in FIG. 14(b), and is destroyed in a manner that is difficult to repair. Note that, when the operator performs the opening operation from a position relatively close to the hinge part 64 in the area E, as shown in FIG. 14(c), the flap piece 3 is separated by the secondary half cut Hs2, and peeling may start from the second main half cut Hm2 on the side where the secondary half cut Hs2 is provided. As a result, the right spine outer flap 21R is separated into the flap piece 3 and the remaining part 4 as shown in FIG. 14(c), and is destroyed in a manner that is difficult to repair.

[0075] Note that, although a typical example is described here, depending on the operator's gripping position and the manner in which force is applied, even when opening from area D, the peeled state shown in Figure 14(b) may result.

[0076] FIG. 15 is a perspective view of the packaging box 1 in a state before the right outer flap 21R is closed, when only the minor half-cut Hs3 continuing from the second main half-cut Hm2 on the upper side in FIG. 15 is provided as the minor half-cut Hs, as viewed from the right outer flap 21R side. FIG. 16 is a perspective view of the packaging box 1, which shows a schematic example of a state in which traces of opening are left by an opening operation of the right outer flap 21R of the packaging box 1 shown in FIG. 15. FIGS. 16(a) and (b) show an example in which the operator's gripping position is the region F in FIG. 15, and FIG. 16(c) shows an example in which the operator's gripping position is the region G in FIG. 15. The region F is the leading edge 22a, or the side edge 22b opposite to the side where the minor half-cut Hs3 is provided. The region G is the side edge 22b on the side where the minor half-cut Hs3 is provided.

[0077] As shown in FIG. 16(a), when the operator starts the opening operation from the leading edge 22a of the region F, a force is applied to the middle layer I of the cardboard at the first main half cut Hm1, and peeling starts. Also, peeling progresses along the second main half cut Hm2 at the top and bottom in the figure. Also, when the operator starts the opening operation from the side edge 22b of the region F, a force is applied to the middle layer I of the cardboard at the second main half cut Hm2 and the first main half cut Hm1 on the side where the minor half cut Hs3 is not provided, and peeling starts. Also, peeling progresses along the first main half cut Hm1 and the second main half cut Hm2 on the side where the minor half cut Hs3 is provided. As a result, the right spine outer flap 21R is separated into the flap piece 3 and the remaining part 4 as shown in FIG. 16(a), and is destroyed in a manner that is difficult to repair. When the operator opens the package from a position relatively close to the minor half-cut Hs3 in the region F, the flap piece 3 may be severed at the minor half-cut Hs3 and peeling may begin at the first major half-cut Hm1, as shown in Fig. 16(b). This causes the right outer flap 21R to separate into the flap piece 3 and the remaining part 4, as shown in Fig. 16(b), and the right outer flap 21R is destroyed in a manner that is difficult to repair.

[0078] 16(c), when the operator starts the opening operation from area G, the flap piece 3 is cut at the secondary half-cut Hs3, and at the same time, a force is applied to the middle layer I of the cardboard at the portion of the second main half-cut Hm2 on the side where the secondary half-cut Hs3 is provided, and peeling begins. As a result, the right outer flap 21R is separated into the flap piece 3 and the remaining part 4 as shown in FIG. 16(c), and is destroyed in a manner that is difficult to repair.

[0079] Note that, although a typical example is described here, depending on the operator's gripping position and the manner in which force is applied, even when opening from area G, the peeled state shown in FIG. 16(a) may result.

[0080] As described above, by providing at least one minor half-cut Hs extending from the portion adjacent to the outer edge 22 to the portion adjacent to the main half-cut Hm, the minor half-cut Hs cooperates with the main half-cut Hm to induce the above-mentioned peeling or separation, making it easy to leave clear traces of the opening of the packaging box 1. However, as described above, when the minor half-cut Hs is arranged as shown in Fig. 9, it becomes easy to leave clearer traces of the opening of the packaging box 1 regardless of the operator's gripping position.

[0081] Thus, in this embodiment, the packaging box 1 formed of cardboard has an inner lid portion (right front inner flap) 41R that is arranged to close at least a portion of the opening 1b formed on one side of the box body 1a capable of accommodating the item P to be packed, and an outer lid portion (right back outer flap) 21R that is folded at the folding portion (hinge portion) 64R and overlaps at least a portion of the surface of the inner lid portion 41R that faces the outside of the packaging box 1. In this embodiment, the outer lid portion 21R has a fixing portion 2a in which an fixing member 2 is disposed to fix the outer lid portion 21R, which is overlapped on the inner lid portion 41R, to the inner lid portion 41R; a first cut line (main half cut) Hm formed by a cut made from the back surface R, which is the surface of the outer lid portion 21R that faces the inner lid portion 41R when the outer lid portion 21R is overlapped on the inner lid portion 41R, and does not penetrate to the front surface F, which is the surface opposite the back surface R, and the first cut line Hm is formed so as to surround the fixing portion 2a by the first cut line Hm and the folding portion 64R; and a second cut line (minor half cut) Hs formed by a cut made from the back surface R that does not penetrate to the front surface F, and the second cut line Hs is formed between the outer edge 22 of the outer lid portion 21R and the first cut line Hm, extending from the outer edge side toward the first cut line side. In this embodiment, the inner lid portion 41R and the outer lid portion 21R are provided on a side of the box body 1a different from the regular opening portion of the packaging box 1. In this embodiment, a seal 13 that leaves a trace of opening when the regular opening portion is opened is attached to the regular opening portion.

[0082] In particular, in this embodiment, the first cut line Hm has a first portion (first main half cut) Hm1 extending in a direction along the bent portion 64R, and two second portions (second main half cuts) Hm2 each extending from the bent portion side toward one end side of the length direction of the first portion Hm1 in a direction intersecting the bent portion 64R. In addition, in this embodiment, the packaging box 1 has second cut lines Hs2 and Hs6 formed so as to continue in the length direction of the first portion Hm1 between at least one end of both ends in the length direction of the first portion Hm1 of the first cut line Hm and the outer edge 22. In this embodiment, the packaging box 1 has a second cut line Hs4 formed so as to be located closer to the center than the end in the length direction of the first portion Hm1 of the first cut line Hm and to extend in a direction intersecting the bent portion 64R. In this embodiment, the packaging box 1 has second cut lines Hs3 and Hs5 formed so as to continue in the longitudinal direction of the second portion Hm2 between the end of the second portion Hm2 of the first cut line Hm on the first portion side and the outer edge 22. In this embodiment, the packaging box 1 has second cut lines Hs1 and Hs7 formed so as to extend in the direction along the folded portion 64R, located closer to the center than the end of the second portion Hm2 of the first cut line Hm in the longitudinal direction.

[0083] As described above, according to this embodiment, the flap is destroyed by the opening operation, and more typically, a piece is separated from the packaging box 1, so that it is possible to clearly leave traces of the opening of the packaging box 1. Therefore, according to this embodiment, it is possible to leave traces of the opening of the packaging box 1 and make it difficult to conceal the traces of the opening of the packaging box 1.

[0084] [Example 2] Next, another embodiment of the present invention will be described. In this embodiment, elements having the same or corresponding configurations or functions as those in the first embodiment will be given the same reference numerals as those in the first embodiment, and detailed descriptions thereof will be omitted.

[0085] Fig. 17 is a plan view of the right outer flap 21R of the packaging box 1 of this embodiment as viewed from the inside. Fig. 18 is a perspective view of the packaging box 1 of this embodiment in an assembled state as viewed from the right outer flap 21R side.

[0086] In addition to the configuration shown in Figs. 4 to 9 described in the first embodiment, the packaging box 1 of this embodiment has a through cut Ct formed in the right outer flap 21R. In this embodiment, the right outer flap 21R has a first through cut Ct1 extending in a direction intersecting the first main half cut Hm1 and intersecting the hinge portion 64R (approximately perpendicular in this embodiment) as the through cut Ct. In addition, in this embodiment, the right outer flap 21R has a second through cut Ct2 extending in a direction along the hinge portion 64R (approximately parallel in this embodiment) adjacent to the end of the first through cut Ct1 on the hinge portion 64R side as the through cut Ct. In other words, the second through cut Ct2 extends in a direction intersecting the first through cut Ct1 (approximately perpendicular in this embodiment).

[0087] In this embodiment, the end of the first through cut Ct1 on the hinge portion 64R side is in contact with the second through cut Ct2. From the viewpoint of facilitating the separation of the flap piece 3 (FIG. 11, etc.) by the opening operation described later, it is preferable that they are in contact with each other. However, similar to the gap regarding the half cut described in the first embodiment, a gap of, for example, about 5 mm or less (typically 1 mm or more) may be provided between the end of the first through cut Ct1 on the hinge portion 64R side and the second through cut Ct2. Also, in this embodiment, the end of the first through cut Ct1 on the tip edge 22a side is adjacent to the tip edge 22a with a predetermined interval. This predetermined interval is, for example, about 0.5 cm or more and 3 cm or less. The end of the first through cut Ct1 on the tip edge 22a side may be in contact with the tip edge 22a. However, in order to prevent the right outer flap 21R from accidentally lifting or being opened from the through cut Ct during transportation of the packaging box 1, it is preferable that the above-mentioned predetermined interval is provided.

[0088] In this embodiment, the first through cut Ct1 is located at approximately the center of the length of the first main half cut Hm1 (approximately the center of the right back outer flap 21R in the direction along the hinge portion 64R). Therefore, in this embodiment, the first through cut Ct1 overlaps with a part of the minor half cut Hs4 provided at approximately the center of the length of the first main half cut Hm1 between the tip edge 22a and the first main half cut Hm1. In other words, in this embodiment, the minor half cut Hs4 extends from the tip edge 22a and contacts the first through cut Ct1. In this embodiment, the fixing portion 2a is located between the second through cut Ct2 and the first main half cut Hm1 and is provided so as to cross the first through cut Ct1.

[0089] When the through cut Ct is formed, it is preferable to form it on the line of the main half cut Hm, on the line of the sub-half cut Hs, or in the area surrounded by the main half cut Hm and the hinge portion 64R. This makes it easier to separate the flap piece 3 from the right back outer flap 21R by the opening operation. Note that the form of the through cut Ct in this embodiment is one example, and is not limited to this form. For example, as in the case of the half cut described in Example 1, the through cut Ct (at least one of the first through cut Ct1 and the second through cut Ct2) may have a discontinuous part on its line where no cut is made. As in the case of the half cut described in Example 1, the number and length of the discontinuous part can be set appropriately, and it may be formed in the shape of a perforation line.

[0090] In this embodiment, the configuration for leaving a trace of opening of the packaging box 1 according to the present invention (main half cut Hm, secondary half cut Hs, through cut Ct, etc.) is provided on the right outer flap 21R, but it may be provided on the left outer flap 21L as described in embodiment 1. Also, the configuration for leaving a trace of opening of the packaging box 1 according to the present invention may be provided on both the right outer flap 21R and the left outer flap 21L.

[0091] Next, the opening operation of the right outer flap 21R in this embodiment will be further described. Figure 19 is a perspective view that shows a schematic diagram of the packaging box 1 with traces of opening when the operator's gripping position is the leading edge 22a above the approximate center in the vertical direction in Figure 19 (for example, a position closer to the center than the upper end). In this case, the operator grips the leading edge 22a above the approximate center in the vertical direction in Figure 19, which is not bonded to the right front inner flap 41R with the adhesive 2, and starts the opening operation to pull the right outer flap 21R away from the right front inner flap 41R. A secondary half cut Hs4 is provided between the leading edge 22a and the first main half cut Hm1 at the approximate center in the vertical direction in Figure 19 of the right outer flap 21R. Furthermore, in this embodiment, a first through cut Ct1 is provided at the approximate center of the right outer flap 21R in the vertical direction in Fig. 19, so as to be continuous with the above-mentioned minor half cut Hs4 and to cross the first main half cut Hm1. Therefore, when the right outer flap 21R is gripped at the gripping position and an opening operation is started, the right outer flap 21R is more likely to be divided into upper and lower parts in Fig. 19 from the minor half cut Hs4 and the first through cut Ct2 as starting points than in the case of the first embodiment shown in Fig. 11. Then, when the right outer flap 21R gripped near the upper tip edge 22a in Fig. 19 is rolled up to the vicinity of the first main half cut Hm1, a force is applied to the cardboard surface F and the middle layer I of the part where the first main half cut Hm1 of the right outer flap 21R is provided. In addition, a secondary half cut Hs2 is provided at the upper end of the right outer flap 21R in FIG. 19 so as to be continuous with the first main half cut Hm1, and a force is also applied to the cardboard surface F and the intermediate layer I at the portion where the secondary half cut Hs2 is provided. As a result, peeling occurs in the right outer flap 21R from the portion of the first main half cut Hm1 and the secondary half cut Hs2 above approximately the center in the vertical direction in FIG. 19. Then, when the operator continues the operation of opening the right outer flap 21R while accompanying this peeling, a part of the peeling progress reaches the second through cut Ct2. Then, the portion of the right outer flap 21R held by the operator is guided by the second through cut Ct2 and is easily separated from the remaining portion 4 of the right outer flap 21R that remains fixed to the right inner front flap 41R.This typically results in the flap piece 3 separating, or even if the flap piece 3 does not separate completely, the right outer flap 21R is destroyed in a manner that is difficult to repair due to the peeling, leaving clear evidence that the packaging box 1 has been opened.

[0092] Thus, in this embodiment, the outer lid part (right back outer flap) 21R has a through cut Ct penetrating from the back surface to the front surface of the outer lid part 21R on the first cut line (main half cut) Hm, on the second cut line (minor half cut) Hs, or in the area surrounded by the first cut line Hm and the folded part 64R. In particular, in this embodiment, the outer lid part 21R has a first through cut Ct1 that crosses the first part (first main half cut) Hm1 of the first cut line Hm and extends in a direction intersecting the folded part 64R, and a second through cut Ct2 that is adjacent to the end of the first through cut Ct1 on the folded part side and extends in a direction along the folded part 64R.

[0093] Here, in the configuration of this embodiment, since the flap piece 3 and the remaining part 4 are guided to the first through cut Ct1 and the second through cut Ct2, the distance of the breaking portion 3a where the flap piece 3 and the remaining part 4 break freely according to the operation of the operator is relatively short, and the shape of the breaking portion 3a is likely to be uniform. In other words, in the configuration of this embodiment, the right back outer flap 21R is more likely to break, but the shape of the breaking portion 3a is more likely to be uniform than in the configuration of Example 1 shown in FIG. 11. In contrast, in the configuration of Example 1 shown in FIG. 11, the distance of the breaking portion 3a where the flap piece 3 and the remaining part 4 break freely according to the operation of the operator after being guided to the secondary half cut Hs4 is relatively long, and the shape of the breaking portion 3a is likely to be indefinite. In other words, in the configuration of Example 1 shown in FIG. 11, the right back outer flap 21R is less likely to break than in this embodiment, but the shape of the breaking portion 3a is less likely to be uniform. The configuration of Example 1 and the configuration of this embodiment can be selected and used as desired, but it can be said that the configuration of Example 1 is more likely to leave traces that are more difficult to repair than the configuration of this embodiment.

[0094] The manner in which traces of opening are left when the operator's gripping position or the arrangement of the secondary half-cut Hs is changed is similar to that described in the first embodiment, and therefore will not be described here repeatedly.

[0095] [others] Although the present invention has been described above with reference to specific embodiments, the present invention is not limited to the above-mentioned embodiments.

[0096] In the above embodiment, the case where the object to be packed in the packaging box is a cartridge used in an image forming apparatus using an electrophotographic process has been described as an example, but the present invention is not limited to such an embodiment. The object to be packed may be any product distributed in the market, including other consumables in the image forming apparatus (waste toner containers, belts such as intermediate transfer belts, or ink cartridges, etc.), food products, medicines, quasi-drugs, etc. The size of the packaging box and the number of faces of the peripheral wall may be appropriately set to suit the object to be packed.

[0097] In the above embodiment, the outer flap is generally rectangular in plan view, but may be generally polygonal in plan view other than generally rectangular, generally circular, generally elliptical, generally oval, etc. In these cases, the main half cut can be typically formed to surround the fastening portion in a shape generally similar to the outer edge of the outer flap, and the main half cut may be formed only with straight lines, only with curved lines, or a combination of straight lines and curved lines.

[0098] In addition, for example, when a portion corresponding to at least one of the right and left outer flaps in the above embodiment is considered to be a legitimate opening portion, a configuration for leaving a trace of tampering according to the present invention may be provided at a portion corresponding to the top panel in the above embodiment. In this case, the joining plate constitutes an inner lid portion arranged to close at least a portion of an opening formed on one side of a box body capable of accommodating an object to be packed. In this case, the top panel constitutes an outer lid portion that is folded at a folding portion and overlapped with at least a portion of the surface of the inner lid portion facing the outside of the packaging box.

[0099] In addition, the configuration for leaving a trace of opening according to the present invention may be applied as a configuration for leaving a trace of opening at a properly opened portion of a packaging box. For example, in the case of a configuration using the opening strip 18 shown in FIG. 21(b), a main half cut Hm is provided in the top surface first portion 10a so as to surround the adhesive 2, and a sub-half cut Hs can be provided for the main half cut Hm in the same manner as in the above-mentioned embodiment. In this case, the start point Hma and the end point Hmb of the main half cut Hm can be disposed adjacent to the breaking pattern 17 remaining as the edge of the top surface first portion 10a. Alternatively, the main half cut Hm may be formed so as to cross the breaking pattern 17 so that the start point Hma and the end point Hmb of the main half cut Hm are disposed adjacent to the hinge portion 61 between the top panel 10 and the back panel 20. With such a configuration, a trace of opening from a place other than the opening strip 18 can be left. [Explanation of symbols]

[0100] 1 Packing box 2. Glue 2a Fixed part 3 Flap piece 10 Top plate 20 Back plate 21R Right outer flap 22 Outer edge of right dorsal flap 22a Tip edge 22b Side edge 30 Bottom plate 40 Front plate 41R Right medial flap 50 Joint plate 64R Hinge Ct(Ct1, Ct2) Through cut Hm (Hm1, Hm2) Main half cut Hs(Hs1~Hs7) Second half cut P Cartridge

Claims

1. In a packing box made of cardboard, An inner lid portion arranged to close at least a part of an opening formed on one side of a box body capable of accommodating an object to be packed; An outer lid portion is folded at a folding portion and overlapped with at least a part of a surface of the inner lid portion facing the outside of the packaging box; having The outer lid portion is a fastening portion in which a fastening member for fastening the outer lid portion overlapping the inner lid portion to the inner lid portion is disposed; a first cut line formed by a cut that is made from a back surface, which is a surface of the outer lid portion that faces the inner lid portion when the outer lid portion is overlapped with the inner lid portion, and does not penetrate to a front surface, which is a surface opposite to the back surface, the first cut line formed so as to surround the fixing portion by the first cut line and the folding portion; A second cut line is formed by a cut that is made from the back surface and does not penetrate to the front surface, and the second cut line extends between an outer edge of the outer lid portion and the first cut line so as to reach the outer edge from the first cut line side; A packaging box comprising:

2. The packaging box according to claim 1, characterized in that the first cut line has a first portion extending in a direction along the folded portion, and two second portions each extending in a direction intersecting the folded portion from the folded portion side toward one end side of the first portion in the longitudinal direction.

3. 3. The packaging box according to claim 2, characterized in that the second cut line is formed between at least one of both longitudinal ends of the first portion and the outer edge so as to continue in the longitudinal direction of the first portion.

4. 4. The packaging box according to claim 2 or 3, characterized in that the second cut line is located closer to the center than the longitudinal end of the first portion and is formed so as to extend in a direction intersecting the folded portion.

5. 5. The packaging box according to claim 2, further comprising a second cut line formed between the end of the second portion on the first portion side and the outer edge so as to continue in the longitudinal direction of the second portion.

6. The packaging box according to any one of claims 2 to 5, characterized in that the second cut line is located closer to the center than the end in the longitudinal direction of the second portion and is formed so as to extend in a direction along the folded portion.

7. The packaging box according to any one of claims 1 to 6, characterized in that the outer lid portion has a through cut that penetrates from the back surface to the front surface on the first cut line, on the second cut line, or within an area surrounded by the first cut line and the folding portion.

8. The packaging box according to any one of claims 2 to 6, characterized in that the outer lid portion has a first through cut formed by a cut penetrating from the back surface to the front surface, extending across the first portion in a direction intersecting the folded portion, and a second through cut formed by a cut formed by a cut penetrating from the back surface to the front surface, and extending in a direction along the folded portion adjacent to an end of the first through cut on the folded portion side.

9. 9. The packaging box according to claim 1, wherein the first cut line has a discontinuous portion on the line where no cut is made.

10. 10. The packaging box according to claim 1, wherein the second cut line has a discontinuous portion on the line where no cut is made.

11. 11. The packaging box according to claim 1, wherein the inner lid portion and the outer lid portion are provided on a side of the box body different from a regular opening portion of the packaging box.

12. 12. The packaging box according to claim 11, wherein a seal that leaves a trace of tampering when the genuine tampering portion is opened is attached to the genuine tampering portion.

13. 13. The packaging box according to claim 1, which is configured to accommodate a cartridge used in an image forming apparatus.

Images