JP6885744B2 - Packaging box - Google Patents

Description

The present invention relates to a packaging box.

There is known a packaging box in which the opening of the body box is closed with a tray or the like.

For example, the case described in Patent Document 1 is formed in a substantially rectangular parallelepiped shape by arranging a box-shaped lid (hereinafter, also referred to as a “body box”) on a tray. The tray includes a pair of rectangular walls and a pair of side flaps erected on the four sides of the rectangular central flap (hereinafter, both are also collectively referred to as "side walls"). The body box is located inside the four side walls surrounding the central flap and is glued to a pair of rectangular walls.

Japanese Patent No. 4454158

However, in the above case, it is difficult for the operator to manually insert the body box into the inside of the four side walls. Another method of manually fixing the tray to the body box is to cover the opening on the lower surface of the body box with the tray and then bend each side wall. However, in this case, when the side wall is adhered to the body box (or fixed with adhesive tape), the tray may shift from the opening on the lower surface of the body box. On the other hand, when molding the above-mentioned case with a box-making machine, a dedicated box-making machine using a mandrel was required to mold the body box fixed to the inside of the tray.

Even if we consider the case where the four side walls of the tray are manually inserted into the inside of the body box, it is difficult to insert each side wall as described above. Further, when the four side walls were put inside the body box, the tray sometimes got inside the body box.

The present invention provides a packaging box for easily connecting a closed body to a body box in order to solve the above problems.

In order to achieve the above object, the packaging box of the present invention includes a body box having an opening on one side and a closing body connected to the body box with the opening closed. Is provided in a state of being connected to a face plate formed so as to be able to close the opening and the peripheral edge of the face plate, and enters the inside of the body box through the opening when the face plate closes the opening. It is provided on the outer surface of the body box in a state where the inner piece is connected to the peripheral edge of the face plate at a position where the inner piece is displaced in the circumferential direction and sandwiches the body box, and the face plate closes the opening. Includes a pair of outer pieces to be connected.

In this case, it is preferable that the inner piece is formed so that the distance from the peripheral edge of the face plate to the free end is longer than that of the outer piece.

In this case, a first folding line is formed between the inner piece and the face plate, and two parallel second folding lines are formed between the outer piece and the face plate, and the two second folding lines are formed. The distance between the two polygonal lines is preferably formed wider than the plate thickness of the body box.

In this case, the face plate constitutes the bottom surface of the body box with the opening closed, a pair of the inner pieces are provided at positions sandwiching the face plate, and the pair of inner pieces are provided from the body box. It is preferable to include a pair of grips for holding the separated closed body.

In this case, it is preferable that the body box includes an opening portion that opens when the closed body is separated to release the connection with the outer piece.

According to the present invention, it is possible to easily connect the obstructed body to the body box.

It is a perspective view which shows the packaging box which concerns on one Embodiment of this invention. It is an exploded perspective view which shows the packaging box which concerns on one Embodiment of this invention. It is a top view which shows the blank of the body box and the lid body of the packaging box which concerns on one Embodiment of this invention. It is sectional drawing explaining the manual assembly process of the packaging box which concerns on one Embodiment of this invention. It is a perspective view which shows the state which the packaging box which concerns on one Embodiment of this invention is turned upside down. It is sectional drawing explaining the assembly process by the sealing machine of the packaging box which concerns on one Embodiment of this invention. It is a perspective view explaining the opening procedure of the packaging box which concerns on one Embodiment of this invention. It is an exploded perspective view which shows the state which opened the packaging box which concerns on one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In this specification, terms indicating directions and positions are used, but these terms do not limit the technical scope of the present invention.

<Outline of packaging box>
The packaging box 1 according to the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing a packaging box 1. FIG. 2 is an exploded perspective view showing the packaging box 1. FIG. 3 is a plan view showing blanks 2A and 3A of the body box 2 and the tray 3.

As shown in FIGS. 1 and 2, the packaging box 1 includes a body box 2 and a tray 3. The body box 2 is a substantially rectangular parallelepiped box in which the lower surface is removed from the A-type corrugated cardboard box. That is, the body box 2 is formed in a square tubular shape having a lower surface opening 16D on the lower surface. The tray 3 as an example of the closed body is connected to the body box 2 with the lower surface opening 16D closed (see FIG. 1). The packaging box 1 is a so-called semi-A type corrugated cardboard box that is sealed by closing the upper surface opening 16U of the body box 2 with a plurality of flaps 12 and 13 and closing the lower surface opening 16D of the body box 2 with a tray 3. Is. Further, the packaging box 1 is opened by opening the flaps 12 and 13 or by separating the body box 2 and the tray 3.

The body box 2 and the tray 3 are formed by assembling the blanks 2A and 3A shown in FIG. 3, respectively. The blanks 2A and 3A are formed by punching a piece of paper cardboard with a paper punching device. The corrugated cardboard is, for example, a corrugated cardboard 4A bonded with a front liner 4B and a back liner 4C (see FIG. 2). Note that FIG. 3 shows the front liner 4B side (outer surface side of the packaging box 1). In the present specification, the direction parallel to the corrugated cardboard center 4A is referred to as the "step direction", and the direction orthogonal to the step direction is referred to as the "flow direction". “X” shown in the drawing indicates “step direction”, and “Y” indicates “flow direction”.

<Structure of body box>
As shown in FIG. 3, the blank 2A of the body box 2 includes a pair of side plates 10, a pair of end face plates 11, a pair of outer flaps 12, and a pair of inner flaps 13.

The pair of side plates 10 and the pair of end face plates 11 are provided in a state of being alternately connected in the flow direction. Each of the face plates 10 and 11 is formed in a substantially rectangular shape having the same dimensions in the step direction. The side plate 10 is formed to have a longer dimension in the flow direction than the end face plate 11. A joint face plate 14 is provided at one end of one side plate 10 in the flow direction in a continuous state. A joint piece 14A is provided at one end of the joint face plate 14 in the step direction in a continuous state.

The pair of outer flaps 12 are provided so as to be connected to one end of the side plate 10 in the step direction. Each of the pair of inner flaps 13 is provided so as to be connected to one end in the step direction of the end face plate 11. Each of the flaps 12 and 13 is formed in a substantially rectangular shape having the same dimensions in the step direction. The dimension of each of the flaps 12 and 13 in the step direction is approximately half of the dimension of the end face plate 11 in the flow direction. The dimensions of the outer flap 12 in the flow direction are substantially the same as the dimensions of the side plate 10 in the flow direction. The dimensions of the inner flap 13 in the flow direction are substantially the same as the dimensions of the end face plate 11 in the flow direction.

A ruled line 15 is formed at the boundary between the face plates 10 and 11, the flaps 12 and 13, the joint face plate 14, and the joint piece 14A. The ruled line 15 is formed by crushing a corrugated cardboard linearly from the back liner 4C side in the thickness direction. A plurality of cuts 15A are cut at substantially equal intervals in a part of the ruled line 15 between the end face plate 11 and the inner flap 13. The plurality of cuts 15A are formed in the central portion of the end face plate 11 in the flow direction.

Each of the pair of end face plates 11 includes a pair of opening portions 20 that are opened when the body box 2 and the tray 3 are separated. The pair of opening portions 20 are formed at the central portion of the end face plate 11 in the flow direction so as to be separated from each other in the step direction. Since the opening portion 20 located above in the assembled body box 2 has a shape in which the opening portion 20 located below is turned upside down (see FIG. 2), the body box 2 is assembled in the following description. The lower opening portion 20 will be described with reference to the state (see FIGS. 1 and 2).

As shown in FIGS. 2 and 3, the opening portion 20 includes a pushing piece 21 and a picking piece 22. The push-in piece 21 is configured by cutting a substantially U-shaped full cutting line 21A into the end face plate 11 leaving one upper side. The push piece 21 is formed in a state of extending downward from one upper side. An opening ruled line 21B (similar to the ruled line 15) is formed on the upper side of the push piece 21. The picking piece 22 is formed by cutting a substantially semicircular sewing machine wire 22A having an arc extending downward from the lower part of the pushing piece 21 into the end face plate 11. At the upper part of the picking piece 22, a defect portion 22B recessed in a substantially semicircular shape is formed along the lower shape of the pushing piece 21.

<Tray configuration>
As shown in FIG. 3, the blank 3A of the tray 3 includes a bottom plate 30, a pair of inner pieces 31, and a pair of outer pieces 32.

The bottom plate 30 is formed in a substantially rectangular shape that is long in the flow direction. The dimension of the bottom plate 30 in the step direction is substantially the same as the dimension of the end face plate 11 in the flow direction, and the dimension of the bottom plate 30 in the flow direction is substantially the same as the dimension of the side plate 10 in the flow direction. That is, the bottom plate 30 is formed so as to be able to close the lower surface opening 16D of the body box 2.

The pair of inner pieces 31 are provided in a state of being connected to both ends (periphery) in the step direction of the bottom plate 30. That is, the pair of inner pieces 31 are provided at positions sandwiching the bottom plate 30. The inner piece 31 is formed in a substantially rectangular shape that is long in the flow direction. The dimensions of the inner piece 31 in the flow direction are substantially the same as the dimensions of the bottom plate 30 in the flow direction. Both corners in the flow direction are chamfered in a round shape on the outer side of the inner piece 31 in the step direction. A first folding line 33 is formed between the inner piece 31 and the bottom plate 30 (boundary). The first folding line 33 is the same as the ruled line 15 of the body box 2, and is formed by crushing the corrugated cardboard linearly from the back liner 4C side in the thickness direction.

The pair of inner pieces 31 include a pair of grips 34 for holding the tray 3 separated from the body box 2 (see also FIG. 2). The grip portion 34 is formed in the central portion of the inner piece 31. The grip portion 34 is configured by cutting a substantially rounded rectangular all-cut line 34A into the inner piece 31 leaving one side on the outer side in the step direction. A gripping ruled line 34B (similar to the ruled line 15) is formed on one side of the grip portion 34 on the outer side in the step direction.

The pair of outer pieces 32 are provided so as to be connected to both ends (periphery) of the bottom plate 30 in the flow direction. That is, the pair of outer pieces 32 are provided at positions that sandwich the body box 2 with a deviation of approximately 90 degrees in the circumferential direction from the pair of inner pieces 31. The outer piece 32 is formed in a substantially rectangular shape that is long in the step direction. The dimension of the outer piece 32 in the step direction is substantially the same as the dimension of the bottom plate 30 in the step direction. Both corners in the step direction are chamfered round on the outside in the flow direction of the outer piece 32.

Two parallel second folding lines 35 (similar to the ruled line 15) are formed between the outer piece 32 and the bottom plate 30. The distance G between the two second folding lines 35 is formed to be slightly wider than the plate thickness T (corrugated cardboard plate thickness (see FIG. 4)) of the body box 2 (end face plate 11). This interval G is set to, for example, about 6 mm. The length obtained by adding the pair of intervals G to the dimension of the bottom plate 30 in the flow direction is slightly longer than the length in the longitudinal direction of the assembled body box 2.

Further, the inner piece 31 described above is formed so that the distance from the peripheral edge of the bottom plate 30 to the free end (tip) is longer than that of the outer piece 32. That is, the inner piece 31 extends outward longer from the end of the bottom plate 30 than the outer piece 32. Specifically, the length from the outer second folding line 35 to the tip of the outer piece 32 (hereinafter, also referred to as “protruding dimension S2”) is the length from the first folding line 33 to the tip of the inner piece 31 (hereinafter, also referred to as “protruding dimension S2”). , Also referred to as "protruding dimension S1"). Further, the difference between the protruding dimension S1 of the inner piece 31 and the protruding dimension S2 of the outer piece 32 is about 25 mm.

<Packaging box assembly process>
Next, the assembly process of the packaging box 1 will be described. The packaging box 1 may be manually assembled by an operator, or may be automatically or semi-automatically assembled by a box making machine.

A case where the operator manually assembles the packaging box 1 will be described mainly with reference to FIGS. 4 and 5. FIG. 4 is a cross-sectional view illustrating a manual assembly process of the packaging box 1. FIG. 5 is a perspective view showing a state in which the packaging box 1 is turned upside down.

<Assembly process by workers>
First, the worker assembles the body box 2. The operator bends each of the face plates 10, 11 and 14 along the ruled line 15 and adheres the joint face plate 14 to the inner end portion of the end face plate 11. Further, the operator adheres the joint piece 14A to the inner surface of the inner flap 13. Subsequently, the operator bends the pair of inner flaps 13 along the ruled line 15 and the pair of outer flaps 12 along the ruled line 15. In this state, the upper surface opening 16U of the body box 2 is closed by the four flaps 12 and 13. The tips of the pair of inner flaps 13 are separated, and the tips of the pair of outer flaps 12 are butted at substantially the center (see FIG. 2).

Subsequently, the operator attaches the adhesive tape 36 from one end face plate 11 to the other end face plate 11 via the upper surface (outer flap 12) of the body box 2 (see FIG. 1). The adhesive tape 36 is attached along the abutting portion of the pair of outer flaps 12. Further, both ends of the adhesive tape 36 are preferably attached so as to cover the picking piece 22 of the opening portion 20 above (the flaps 12 and 13) and not completely cover the pushing piece 21 (see FIG. 5). ).

With the above, the assembly work of the body box 2 is completed. The operator turns the assembled body box 2 upside down so that the lower surface opening 16D faces upward (see FIG. 4), and the contents such as products are accommodated in the body box 2 from the lower surface opening 16D.

Next, the operator closes the lower surface opening 16D of the body box 2 with the tray 3. As shown in FIG. 4, the operator bends the pair of inner pieces 31 along the first folding line 33. The operator aligns the tray 3 with the body box 2 (see the alternate long and short dash line in FIG. 4), and allows the bent inner piece 31 to enter the inside of the body box 2 through the lower surface opening 16D. The pair of inner pieces 31 enter the body box 2 along the inner surface (back liner 4C) of the pair of side plates 10, and the bottom plate 30 is bridged between the pair of end face plates 11 to form the lower surface opening 16D. Close (see the solid line in Fig. 4). In this state, the pair of outer pieces 32 extend outward from the pair of end face plates 11. Further, the end surface of the end face plate 11 (the edge portion of the lower surface opening 16D) is in contact with the outer piece 32 between the two second folding lines 35. Subsequently, the operator bends the pair of outer pieces 32 toward the end face plate 11 along the outer second folding line 35 (see the broken line arrow in FIG. 4).

Next, as shown in FIG. 5, the operator attaches the adhesive tape 36 from one end face plate 11 to the other end face plate 11 via the tray 3. Further, it is preferable that both ends of the adhesive tape 36 are attached so as to cover the picking piece 22 of the opening portion 20 on the tray 3 side (lower side) and not completely cover the pushing piece 21.

As described above, the assembly work of the packaging box 1 by the operator is completed. That is, the packaging box 1 is in a sealed state. The operator turns the packaging box 1 upside down so that the outer flap 12 of the body box 2 faces upward (see FIG. 1). The bottom plate 30 of the tray 3 constitutes the bottom surface of the body box 2 with the bottom surface opening 16D closed. Further, in this state, the pair of inner pieces 31 enter the inside of the body box 2, and the pair of outer pieces 32 are fixed so as to sandwich the body box 2 from the outside.

The work of attaching the adhesive tape 36 to each of the outer flaps 12 described above may be performed after the tray 3 is connected to the body box 2. In this case, it is preferable that the operator re-extends the flaps 12 and 13 bent along the ruled line 15 to accommodate the contents in the body box 2 through the upper surface opening 16U.

<Assembly process by box making machine>
Next, a case where the packaging box 1 is assembled by a box making machine (not shown) will be described with reference to FIG. FIG. 6 is a cross-sectional view illustrating an assembly process of the packaging box 1 by the sealing machine. For the sake of simplicity, it is assumed that the body box 2 is formed in the shape of a square cylinder having openings on both the upper and lower sides. Further, the same description as the manual assembly work of the packaging box 1 described above will be omitted.

The box making machine bends the pair of inner pieces 31 along the first folding line 33 and the pair of outer pieces 32 along the inner second folding line 35 (see the alternate long and short dash line in FIG. 6). The box-making machine aligns the tray 3 with the body box 2 and allows the tray 3 with the bottom plate 30 facing downward to enter the inside of the body box 2 through the upper surface opening 16U. Each inner piece 31 descends in contact with the inner surface of the side plate 10, and each outer piece 32 descends in contact with the inner surface of the end face plate 11 (see the alternate long and short dash line in FIG. 6). The tray 3 is pushed downward in a substantially horizontal posture while bending as a whole.

When the upper end of each outer piece 32 moves below the lower end of each end face plate 11, the box making machine stops pushing the tray 3 (see the solid line in FIG. 6). Since each outer piece 32 protrudes downward from the lower surface opening 16D, it falls outward with the second folding line 35 as a fulcrum due to the restoring force (elastic force) of the bent portion with the bottom plate 30 (broken line arrow in FIG. 6). reference). At this time, each inner piece 31 stays inside the body box 2 without coming out of the lower surface opening 16D.

Next, the box making machine raises the tray 3 to close the lower surface opening 16D, and bends the pair of outer pieces 32 upward along the outer second folding line 35. Then, the box-making machine attaches the adhesive tape 36 from one end face plate 11 to the other end face plate 11 via the tray 3 (see FIG. 5 and the like). As described above, the assembly work of the packaging box 1 by the box making machine is completed. The contents of the product or the like are housed inside the packaging box 1 through the upper surface opening 16U, and the packaging box 1 is sealed by closing the flaps 12 and 13, respectively.

<Opening the packaging box>
Next, the procedure for opening the packaging box 1 and the like will be described with reference to FIGS. 7 and 8. FIG. 7 is a perspective view illustrating a procedure for opening the packaging box 1. FIG. 8 is an exploded perspective view showing a state in which the packaging box 1 is opened.

The user releases the connection between the end face plate 11 and the outer piece 32 by using the pair of opening portions 20 located below the end face plate 11. Since the actions of the pair of opening portions 20 are the same, the actions of one opening section 20 will be described below.

As shown in FIG. 7, the user pushes the push-in piece 21 of the opening portion 20 formed on the end face plate 11 with a finger. Then, the push-in piece 21 is bent inside the body box 2 along the opening ruled line 21B.

Subsequently, the user hooks the finger pushing the push-in piece 21 on the defective portion 22B of the pick-up piece 22 and pulls the pick-up piece 22 toward the front. The picking piece 22 is cut along the sewing machine wire 22A and separated from the end face plate 11. At this time, the end portion of the adhesive tape 36 attached to the picking piece 22 is also separated from the end face plate 11. Further, the outer piece 32 connected to the picking piece 22 via the adhesive tape 36 is also separated from the end face plate 11. As a result, the connection between the end face plate 11 and the outer piece 32 is released. In this state, the end face plate 11 has holes corresponding to the pushing piece 21 and the picking piece 22.

Then, as shown in FIG. 8, the user pulls up the body box 2 upward to separate the body box 2 and the tray 3. As described above, the packaging box 1 is opened.

When the packaging box 1 is opened, the contents are placed on the tray 3 (bottom plate 30) (see the alternate long and short dash line in FIG. 8). The user pushes the pair of grips 34 formed on the pair of inner pieces 31 inward with a finger. Then, each grip portion 34 is bent inward along the grip ruled line 34B. The user puts both hands into the pair of holes formed by folding the pair of grip portions 34 and grips the inner piece 31 with both hands. The user lifts the tray 3 while holding the inner piece 31 with both hands, and transports the contents to a target place. The user tilts one outer piece 32 of the tray 3 downward at a desired location. Then, the contents slide down along the bottom plate 30 and are thrown into the target place.

The packaging box 1 may be opened by opening the flaps 12 and 13 of the body box 2 without separating the body box 2 and the tray 3. In this case, the user peels off the adhesive tape 36 attached to the pair of outer flaps 12 by using the pair of opening portions 20 located above the end face plate 11. Specifically, the user pushes the push-in piece 21 of the opening portion 20 with a finger, then picks the pick-up piece 22 and peels off the adhesive tape 36.

In the packaging box 1 according to the present embodiment described above, when the bottom plate 30 closes the lower surface opening 16D, a pair of inner pieces 31 enter the inside of the body box 2 from the lower surface opening 16D. Further, in a state where the bottom plate 30 closed the lower surface opening 16D, a pair of outer pieces 32 were connected to the outer surface of the body box 2 so as to sandwich the body box 2. According to this configuration, the tray 3 can be arranged at a position that closes the lower surface opening 16D only by inserting the pair of inner pieces 31 into the inside of the body box 2. Further, by bringing the pair of inner pieces 31 into the inside of the body box 2, it is possible to prevent the tray 3 from being displaced with respect to the lower surface opening 16D. Further, by setting the pair of outer pieces 32 to be arranged on the outside of the body box 2, it is possible to restrict the tray 3 from entering the inside of the body box 2. As a result, the operator can easily manually set the tray 3 in the lower surface opening 16D of the body box 2, and the work of connecting the body box 2 and the tray 3 can be appropriately performed. Then, the packaging box 1 can be assembled quickly.

Further, in the packaging box 1 according to the present embodiment, the protruding dimension S2 of the outer piece 32 is formed longer than the protruding dimension S1 of the inner piece 31 (see FIG. 3). According to this configuration, in a box-making method in which the tray 3 is pushed from the upper surface opening 16U of the body box 2 using a box-making machine, only each outer piece 32 is held while keeping each inner piece 31 inside the body box 2. It can be taken out of the body box 2 (see FIG. 6). Further, since each inner piece 31 is in a state of entering the inside of the body box 2, the tray 3 is smoothly raised by using each inner piece 31 in contact with the inner surface of each side plate 10 as a guide, and the lower surface opening 16D is opened. Can be closed. As a result, the packaging box 1 can be smoothly molded by the above-mentioned box-making method. As described above, the body box 2 and the tray 3 can appropriately correspond not only to the manual box-making method of the operator but also to the box-making method using the box-making machine. Thereby, the body box 2 and the tray 3 can be applied to various box-making methods.

Further, according to the packaging box 1 according to the present embodiment, the outer piece 32 can be bent along the outer second folding line 35 so that the outer piece 32 can be aligned with the outer surface (end face plate 11) of the body box 2. As a result, the end face plate 11 and the outer piece 32 can be connected by using the adhesive tape 36 or the like in a state of being in close contact with each other. Further, a box-making method can be adopted in which the tray 3 is pushed from the upper surface opening 16U of the body box 2 by bending the inner piece 31 at the first folding line 33 and the outer piece 32 at the inner second folding line 35. ..

Further, according to the packaging box 1 according to the present embodiment, the user can grasp the pair of gripping portions 34 and carry the tray 3. As a result, the contents (commodities) placed on the tray 3 can be easily carried to the target place. Further, the user can put the contents into the target place only by grasping the pair of gripping portions 34 and tilting the tray 3. As a result, the work of taking out the contents can be performed easily and quickly.

Further, in the packaging box 1 according to the present embodiment, the body box 2 is configured to include an opening portion 20 that opens when the tray 3 is separated to release the connection with the outer piece 32. According to this configuration, the operator can pull the outer piece 32 away from the body box 2 simply by pulling the finger inserted into the opening portion 20 outward. That is, the packaging box 1 can be easily opened. When disposing of the body box 2 and the tray 3 after opening, the user peels off the adhesive tape 36 of the body box 2, opens the flaps 12 and 13, and folds the body box 2 flat and disposes of it. On the other hand, since the inner piece 31 and the outer piece 32 of the tray 3 are separated from each other, the tray 3 becomes one corrugated cardboard plate only by being separated from the body box 2. As a result, it is possible to save the trouble of disassembling the used tray 3. That is, the disposal work of the tray 3 can be facilitated.

In the packaging box 1 according to the present embodiment, the protruding dimension S2 of the outer piece 32 is about 60% of the protruding dimension S1 of the inner piece 31, and the difference between the two is set to about 25 mm. Not limited to. The protruding dimension S2 of the outer piece 32 can be set in the range of 40% to 70% of the protruding dimension S1 of the inner piece 31. Further, the difference between the protruding dimension S1 of the inner piece 31 and the protruding dimension S2 of the outer piece 32 is preferably 25 mm or more.

Further, in the packaging box 1 according to the present embodiment, the distance G between the two second folding lines 35 is set to about 6 mm, but the present invention is not limited to this. The interval G is preferably changed according to the thickness of the corrugated cardboard (or thick paper) or the like constituting the body box 2.

Further, in the packaging box 1 according to the present embodiment, the inner piece 31 is provided along the inner surface of the side plate 10, and the outer piece 32 is provided along the outer surface of the end face plate 11. Not limited. For example, the inner piece 31 may be provided along the inner surface of the end face plate 11, and the outer piece 32 may be provided along the outer surface of the side plate 10. In this case, the lower opening portion 20 is preferably formed on the side plate 10.

Further, in the packaging box 1 according to the present embodiment, the bottom plate 30 of the tray 3 is formed in a substantially rectangular shape, and the pair of inner pieces 31 and the pair of outer pieces 32 are arranged so as to be displaced from each other by approximately 90 degrees in the circumferential direction. However, the present invention is not limited to this. For example, the bottom plate may be formed in a polygonal shape other than a rectangle, such as a triangle, a pentagon, or a hexagon (not shown). In this case, one or a pair of inner pieces 31 may be connected to the bottom plate, and one or more pairs of outer pieces 32 may be connected to the bottom plate at positions deviated from the inner pieces 31 in the circumferential direction. ..

Further, in the packaging box 1 according to the present embodiment, the tray 3 constitutes the bottom surface of the body box 2 as an example of the closed body, but the present invention is not limited to this. For example, the packaging box may include a lid (another example of the obstruction) that closes the top opening of the body box formed in a bottomed tubular shape (not shown).

Further, in the packaging box 1 according to the present embodiment, the outer flap 12 is fixed to the end face plate 11 via the adhesive tape 36, and the tray 3 (outer piece 32) is fixed to the body box 2 via the adhesive tape 36. However, the present invention is not limited to this. For example, the outer flap 12 may be adhered to the inner flap 13 via an adhesive such as a hot melt adhesive. Similarly, the outer piece 32 may be adhered to the end face plate 11 via an adhesive.

Further, in the packaging box 1 according to the present embodiment, a pair of upper and lower opening portions 20 are formed on the end face plate 11, but the upper opening portion 20 may be omitted. That is, the opening portion 20 may be formed at a position where at least the outer piece 32 of the tray 3 can be separated from the end face plate 11.

Further, the packaging box 1 according to the present embodiment is a semi-A type corrugated cardboard box, but is not limited to this, and may be, for example, a two-piece structure box such as a C-type corrugated cardboard box. Further, the packaging box 1 is formed of corrugated cardboard made of paper, but is not limited to this, and may be formed of, for example, thick paper or a plate made of resin.

The description of the embodiment shows one aspect of the packaging box according to the present invention, and the technical scope of the present invention is not limited to the above embodiment.

1 Packaging box 2 Body box 3 Tray (closed body)
16D bottom opening (opening)
20 Opening part 30 Bottom plate (face plate)
31 Inner piece 32 Outer piece 33 1st folding line 34 Grip 35 2nd folding line G Interval S1, S2 Protruding dimension T Plate thickness

Claims (4)

A body box (2) having an opening (16D) on one side,
A closed body (3) connected to the body box with the opening closed is provided.
The obstructed body
A face plate (30) formed so as to be able to close the opening,
An inner piece (31) provided in a state of being connected to the peripheral edge of the face plate and entering the inside of the body box through the opening when the face plate closes the opening.
A pair of pairs that are provided in a state of being connected to the peripheral edge of the face plate at a position deviating from the inner piece in the circumferential direction and sandwiching the body box, and connected to the outer surface of the body box with the face plate closing the opening. the outer piece (32), only including,
The packaging box (1) is characterized in that the inner piece is formed so that the distance (S1, S2) from the peripheral edge of the face plate to the free end is longer than that of the outer piece. A first folding line (33) is formed between the inner piece and the face plate.
Two parallel second folding lines (35) are formed between the outer piece and the face plate.
The two second fold line distance (G) is, packaging box according to claim 1, characterized in that it is wider than the thickness of the body box (T). The face plate constitutes the bottom surface of the body box with the opening closed.
A pair of the inner pieces are provided at positions sandwiching the face plate.
The packaging box according to claim 1 or 2 , wherein the pair of inner pieces includes a pair of grip portions (34) for holding the closed body separated from the body box. The body box according to any one of claims 1 to 3 , wherein the body box includes an opening portion (20) that opens when the closed body is separated to release the connection with the outer piece. Packaging box.

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