JP7444598B2 - packaging box - Google Patents

Description

The present invention relates to a packaging box that is easy to seal.

With the spread of mail-order sales such as online shopping, products are often transported by mail or courier services. Among these, demand is high for low-profile, thin packaging boxes that can be mailed in the mailbox.

As this type of packaging box, a packaging box having a rectangular cylindrical body and a pair of sealing parts that seal both ends of the body is conventionally known (see Patent Document 1).

In this packaging box, the body is made up of five plate-like members that are successively connected through the body fold line, and the open edges of the plate-like members at both ends of the body are butted against each other. It can be sealed by wrapping it around with tacks.

Japanese Patent Application Publication No. 51-36372

However, this packaging box has the problem that it takes time and effort to seal the box because it is necessary to wrap and untwist the cultural tacks.

In view of the above points, an object of the present invention is to provide a packaging box that is easy to seal.

In order to achieve such an object, the packaging box of the present invention has a rectangular cylindrical body and a pair of sealing parts that seal openings at both ends of the body, the body having a , three or more plate-like members that are successively connected through the body fold line, and provided at one end of the plate-like member on one end side constituting the body, from one edge to the other end. A locking recess cut out toward the body is connected to the other end edge of the plate member on the other end side constituting the body portion via a crease line of the convex portion, and is fitted into the locking recess. This feature includes a locking protrusion whose outer edge is locked to the inner edge of the locking recess.

According to the packaging box of the present invention, the locking recess provided at one end of the plate-like member on the one end side constituting the body has the locking protrusion connected to the plate-like member on the other end side. The package can be easily sealed by simply fitting the parts together.

Further, in the packaging box of the present invention, the invoice that is pasted on the delivery item whose back surface is a sticker is pasted across the plate-like member on the one end side in which the locking recess is formed and the locking protrusion. It is preferable that

According to the packaging box having this configuration, it is possible to more securely seal the box using an invoice that is always used for mail or home delivery.

Further, in the packaging box of the present invention, one end of the plate member on the one end side has a pair of cuts extending from one end edge toward the other end, and a recessed fold connecting the tips of the pair of cuts. The locking recess is formed by bending an area surrounded by the pair of cuts and the locking crease line inwardly of the trunk along the crease line of the recess to form the locking slope portion. It is preferable that it is formed by pulling out from the plate-like member on the proximal end side.

According to the packaging box having this configuration, the locking recess can be formed by simply folding the enclosed area along the crease line of the recess, thereby saving the effort of cutting out the locking recess in advance.

Moreover, in the packaging box provided with a locking slope part, it is preferable that the tip of the locking convex part is locked with the base end part of the locking slope part.

According to the packaging box having this configuration, since the locking protrusion can be supported by the locking slope part from the back side thereof, the locking protrusion may come off into the internal space of the packaging box due to an unexpected impact. It is possible to prevent the package from being opened accidentally.

Furthermore, in this packaging box, it is preferable that the leading edge of the locking slope portion is locked to the inner surface of the plate-like member opposite to the plate-like member at the one end.

According to the packaging box having this configuration, the locking slope portion that supports the locking convex portion can be further supported by the opposing plate-like member, so that the box can be sealed more reliably.

Further, in the packaging box including a locking slope portion, the body portion has a locking piece that is connected to a distal end edge of the locking convex portion via a locking crease line, and the locking piece includes: It is preferable that the locking fold line is bent toward the inner surface of the locking recess, and the outer surface thereof is locked to the outer surface of the locking slope.

According to the packaging box having this configuration, the locking convex portion is supported by the locking slope portion on the entire outer surface of the locking piece provided at the tip thereof, so that the box can be sealed more reliably.

Furthermore, in the packaging box of the present invention, the sealing portion includes a proximal support plate that is connected to the plate-like member via a first sealing fold line, and a second sealing fold line on the proximal support plate. an internal space of the body, comprising: a side wall plate extending in a direction intersecting the body; and a tip support plate connected to the side wall plate through a sealing third fold line; It is preferable that the proximal end support plate and the distal end support plate are formed in a U-shape toward each other, and that the inner surfaces of the proximal end support plate and the distal end support plate are in contact with the inner surface of the plate-like member.

According to the packaging box having this configuration, the side plates can be arranged in an inverted ladder shape closer to the internal space than the edges of the opposing plate-like members, so the strength of the packaging box can be increased.

Moreover, in the packaging box of the present invention, it is preferable that the body portion is formed with a band-shaped break portion sandwiched between a pair of breakable lines extending along the body fold line.

According to the packaging box having this configuration, if the packaging box is sealed with an invoice or packing tape, it can be opened by pulling the band-shaped broken part without peeling off these.

Further, in the packaging box of the present invention, the body has a packaging fold line connecting one end to the other end, and the plate-like member is latched to the plate-like member on both sides sandwiching the packaging fold line. It is preferable that a flexible thin film member is provided which covers at least a portion of the object to be packed placed on the plate-like member and presses against the plate-like member.

According to the packaging box having this configuration, by bending the packaging fold line, a gap is created between the plate member and the thin film member, the object to be packed is inserted, and then the packaging fold line is extended. Then, the thin film members anchored to the plate-like member on both sides of the packaging fold line are pulled and tensed, thereby making it possible to press and support the object to be packed against the plate-like member. Therefore, with the packaging box having this configuration, objects to be packed can be easily packed.

Furthermore, in the packaging box of the present invention, the sealing portion includes a proximal support plate that is connected to the plate-like member via a first sealing fold line, and a second sealing fold line on the proximal support plate. a side wall plate extending in a direction intersecting with the body, and a tip support plate continuous from an edge of the side wall plate via a sealing third fold line; is formed into a U-shape toward the internal space of the plate member, and the proximal end support plate and the distal end support plate are configured such that their inner surfaces are in contact with the inner surface of the plate-like member. The body has a packing fold line connecting one end to the other, and the other plate member to which the proximal end support plate is not connected has a packing object placed on the other plate member. A flexible thin film member that covers at least a portion of the object and presses against the plate member is provided, and the thin film member passes through the inner surface side of another plate member and extends along the packaging fold line on the outer surface side. It is preferable that it be glued or welded to the other plate-like member on both sides, or that it be cylindrical and into which the other plate-like member is inserted.

According to the packaging box having this configuration, the openings at both ends of the body can be sealed by the sealing portions connected to the plate-shaped member, and the openings at both ends of the body can be sealed by the sealing portions connected to the plate-shaped member. By means of both side edges connecting one end side and the other end side, it passes through the inner surface side of the other plate-like member and is bonded or welded to the other plate-like member on both sides sandwiching the packaging fold line on the outer surface side. The object to be packed can be packed by pulling the thin film member or the thin film member which is cylindrical and into which the other plate member is inserted.

Particularly, in this packaging box, when the above-mentioned band-like broken portion is formed, it is preferable to form it on a plate-like member other than the other plate-like member.

According to the packaging box having this configuration, since the band-shaped break portion is not covered by the thin film member, the band-shaped break portion can be easily broken.

FIG. 1 is a perspective view showing an embodiment of a packaging box of the present invention. FIG. 2 is a developed view of a plate-like member of the packaging box shown in FIG. 1; FIG. 2 is a first perspective view showing the packaging process of the packaging box of FIG. 1, and is an explanatory diagram illustrating placement of the object K to be packed. FIG. 2 is a second perspective view showing the packaging process of the packaging box of FIG. 1, and is an explanatory diagram illustrating assembly of the sealing part. FIG. 2 is a third perspective view showing the packaging process of the packaging box of FIG. 1, and is an explanatory diagram illustrating a state assembled into a box shape. FIG. 3 is a fourth perspective view showing the packaging process of the packaging box of FIG. 1, and is an explanatory diagram illustrating a state in which the locking protrusion is fitted into the locking recess.

An embodiment of the present invention will be described based on the drawings.

As shown in FIG. 1, the packaging box 1 of this embodiment includes a short, substantially rectangular parallelepiped-shaped box body 2 (packaging box) and a flexible film (thin film member) 3. 3 and the bottom plate 43 of the box body 2.

The box body 2 has a rectangular cylindrical body 4 extending in the horizontal direction, and a pair of sealing parts 5 that seal openings at both ends of the body 4, respectively. Furthermore, an invoice 6 whose back surface is in the shape of a sticker is affixed to the top plate 41 of the box body 2.

Further, a band-shaped broken portion 7 is formed on the top plate 41 of the box body 2 on the left side of the attached invoice 6.

As shown in FIG. 2, the box body 2 is made of a substantially inverted T-shaped corrugated paperboard 20.

As shown in FIGS. 1 and 2, the body 4 includes a top plate 41, a short side wall plate 42 connected to the right edge of the top plate 41 via a body fold line a, and a short side wall plate 42. It has a bottom plate 43 connected to the right edge of the body via the body fold line a, and a short side wall plate 42 connected to the right edge of the bottom plate 43 via the body fold line a. The top plate 41, the bottom plate 43, and the pair of short side wall plates 42 correspond to the plate-like member of the present invention.

The body portion 4 has a locking convex portion 44 that is connected to the right edge of the right short side wall plate 42 via a convex fold line b. The locking convex portion 44 is narrower than the top plate 41, the bottom plate 43, and the pair of short side wall plates 42 (the length in the vertical direction in FIG. 2 is small), and extends toward the left from the convex fold line b. This is a portion that protrudes into a substantially trapezoidal shape.

The body portion 4 has a locking piece 45 that is connected to the distal end edge of the locking convex portion 44 via a locking crease line c. The locking piece 45 is a rectangular portion having a long side comparable to the tip edge of the locking convex portion 44 .

The top plate 41 is provided with a pair of cuts 46 extending from the left edge toward the right side, and a recessed crease line 47 connecting the tips of the pair of cuts 46. The pair of cuts 46 are formed in a V-shape that gradually separates from the crease line 47 of the recess. A substantially trapezoidal region surrounded by the pair of cuts 46 and the crease line 47 of the recess is substantially the same as the locking protrusion 44, and as described later, the crease line 47 of the concave portion is located on the bottom plate 43 side. It is bent to form a locking slope portion 48.

The top plate 41 has a breakable line 71 extending along the boundary line with the short side wall plate 42, a breakable line 72 extending parallel to this breakable line 71, and a breakable line 73 connecting both. A band-shaped broken portion 7 is formed.

The body 4 has a packaging fold line d connecting the left edge of the top plate 41 and the right edge of the locking piece 45 and extending orthogonally to the body fold line a, the convex fold line b, and the locking fold line c. is formed.

A pair of sealing portions 5 are connected to the upper and lower edges of the top plate 41 via a first sealing fold line e.

Taking the upper sealing part 5 in FIG. 2 as an example, the sealing part 5 includes a base support plate 51 that is connected to the upper edge of the top plate 41 via the first sealing fold line e, and a base A long side wall plate 52 (corresponding to the side wall plate of the present invention) is connected to the upper edge of the end support plate 51 via the sealing second fold line f, and a sealing third fold line is attached to the upper edge of the long side wall plate 52. It has a distal end support plate 53 that is connected to the distal end support plate 53 via the line of sight g.

The length of the long side wall plate 52 in the vertical direction and the length of the short side wall plate 42 in the left and right direction are substantially the same.

Furthermore, the sealing portion 5 has a support tongue piece 54 that is connected to the right end edge of the long side wall plate 52 via the sealing fourth fold line h. The length of the support tongue piece 54 in the vertical direction is substantially the same as the length in the vertical direction of the long side wall plate 52, and the length in the left and right direction is the length in the vertical direction of the base end support plate 51 and the distal end support plate 53. The length is substantially the same as the length of the short side wall plate 42 in the left-right direction.

As shown in FIG. 3, the paperboard 20 is valley-folded along the first sealing fold line e, the sealing portion 5 is folded back toward the top plate 41, and the base end support plate 51 is adhesively fixed to the top plate 41. .

Moreover, as shown in FIG. 3, the packaging box 1 of this embodiment has a flexible film 3. The flexible film 3 is formed of a flexible film made of a synthetic resin film such as polyethylene terephthalate, polyethylene, polypropylene, polycarbonate, and polyvinyl chloride.

The flexible film 3 of this embodiment has a cylindrical shape, and the paperboard 20 is inserted from one opening in the direction along the packaging fold line d, and covers the periphery of the central part of the bottom plate 43 of the paperboard 20. .

Next, a procedure for packaging an object K using the packaging box 1 will be described with reference to FIGS. 3 to 6.

First, as shown in FIG. 3, the paperboard 20 is folded into a valley fold along the packaging fold line d. Next, the object to be packed K is inserted into the gap created by this between the bottom plate 43 and the flexible film 3.

Next, as shown in FIG. 4, the paperboard 20 that has been folded along the packaging crease line d is restored to its flat shape against the tension of the flexible film 3. As a result, the flexible film 3 is pulled toward both end edges of the mounting section 21 and becomes tense, thereby pressing the object to be packed K against the mounting section 21 . Thereby, the object to be packed K is fixed in a predetermined position.

Further, as shown in FIG. 4, the sealing part 5 is assembled. Specifically, by valley-folding the second sealing fold line f, the third sealing fold line g, and the fourth sealing fold line h at approximately 90 degrees, the proximal end support bonded to the top plate 41 is folded. The long side wall plate 52 is erected with respect to the plate 51, the distal support plate 53 is opposed to the proximal support plate 51, and the support tongue piece 54 is formed between the side ends of the proximal support plate 51 and the side ends of the distal support plate 53. Insert. Thereby, the base end support plate 51, the long side wall plate 52, and the distal end support plate 53 are formed into a U-shape (inverted U-shape).

Next, as shown in FIG. 5, the two trunk crease lines a on the left side of the bottom plate 43 are valley-folded at approximately 90°, so that the short side wall plates 42 are erected with respect to the bottom plate 43, and the top plate 41 are opposed to the bottom plate 43.

Further, as shown in FIG. 5, a substantially trapezoidal region surrounded by a pair of cuts 46 and a recess crease line 47 is mountain-folded along the recess crease line 47 and bent downward to form a locking slope portion 48. . The leading edge of the locking slope portion 48 is locked to the inner surface of the bottom plate 43. The inner edge generated when the locking slope portion 48 comes off the top plate 41 is the locking recess 49 of the present invention.

Further, as shown in FIG. 5, the locking crease line c is valley-folded until it becomes an acute angle, and the locking piece 45 is bent so as to approach the inner surface of the locking convex portion 44.

Next, as shown in FIG. 6, the short side wall plate 42 is made to stand up with respect to the bottom plate 43 by valley-folding the body part crease line a at approximately 90 degrees, and furthermore, the convex part crease line b is folded at approximately 90 degrees. By valley-folding it in the angle, the locking protrusion 44 is fitted into the locking recess 49. Specifically, the side edge of the locking convex portion 44 is held between the open edges formed by the cut 46 of the locking recess 49, and the tip of the locking convex portion 44 is held by the base end of the locking slope portion 48. It is supported from below by.

Further, the locking piece 45 passes through the locking recess 49 and enters between the pair of long side wall plates 52 , and is locked by surface contact with the locking slope portion 48.

Furthermore, as shown in FIG. 1, an invoice 6 having a sticker-like back surface is pasted on the top plate 41 on the right side of the band-shaped broken portion 7 so as to straddle the top plate 41 and the locking convex portion 44.

With the above steps, packaging of the object to be packed K using the packaging box 1 is completed.

Hereinafter, the effects of the packaging box 1 of this embodiment will be explained.

In the packaging box 1 of the present embodiment, the pair of sealing parts 5 each have a U-shape (inverted U-shape) toward the internal space of the box body 2, so that the top plate 41, the bottom plate 43, and the Since the sealing portion is arranged in an inverted ladder shape (Roman numeral "II" shape), the strength of the packaging box can be increased.

In particular, in the packaging box 1 of this embodiment, the support tongue piece 54 is sandwiched and supported between the proximal end support plate 51 and the distal end support plate 53 on the outside of the long side wall plate 52, thereby supporting the packaging box 1. Strength can be increased.

Moreover, in the packaging box 1 of this embodiment, since the object K to be packed can be fixed in the gap between the bottom plate 43 and the flexible film 3, the object K to be packed can be easily packed.

The packaging box 1 of this embodiment can be easily sealed by simply fitting the locking protrusion 44 into the locking recess 49.

In particular, in the packaging box 1 of this embodiment, the locking recess can be formed by simply pressing down the locking slope portion 48 along the crease line 47 of the recess, thereby eliminating the need to cut out the locking recess in advance. I can do it.

Moreover, in the packaging box 1 of this embodiment, the locking convex portion 44 can be supported from the back surface side by the locking slope portion 48.

Furthermore, since the leading edge of the locking slope portion 48 is locked to the inner surface of the bottom plate 43, the locking convex portion 44 can also be supported by the bottom plate 43 via the locking slope portion 48.

Furthermore, in the packaging box 1 of this embodiment, the locking piece 45 connected to the distal end edge of the locking convex portion 44 can also be supported in surface contact with the locking slope portion 48 .

As described above, in the packaging box 1 of the present embodiment, the locking protrusion can be prevented from coming off toward the internal space of the packaging box due to an unexpected impact, so that the packaging can be sealed more reliably.

In addition, in the packaging box 1 of this embodiment, the invoice 6 whose back surface is in the form of a sticker is pasted so as to straddle the top plate 41 and the locking protrusion 44, so that it can be easily transported by mail or home delivery. The always-used invoice 6 makes it possible to seal the package more reliably, and it is also possible to omit the trouble of separately sealing the packaging box 1 with tape or the like.

In particular, in the packaging box 1 of this embodiment, the belt-shaped broken part 7 is formed on the top plate 41, and the invoice 6 is attached to this belt-shaped broken part 7 so as not to overlap, so that the invoice 6 does not have to be peeled off. The package can be opened by pulling the band-shaped broken part.

Modifications of this embodiment will be described below.

In the present embodiment, a packaging box having a flexible film 3 has been described as an example, but the packaging box of the present invention is not limited to this, and may be a box 2 without a flexible film 3.

In the present embodiment, the case has been described using as an example a substantially rectangular parallelepiped box having a rectangular cylindrical body 4 extending in the horizontal direction; however, the present invention is not limited to this, and the body may be triangular or larger. It may be pentagonal, hexagonal, etc.

In the present embodiment, an example has been described in which the invoice 6 is sealed with a sealed back surface, but the present invention is not limited to this, and the invoice may be sealed with a separate adhesive tape or the like.

In this embodiment, the case where the band-shaped broken part 7 is formed at the left end of the top plate 41 of the box body 2 has been described as an example, but the present invention is not limited to this, and the band-shaped broken part 7 does not have to be formed. It may be formed anywhere on the top plate 41, the short side wall plates 42, and the bottom plate 43. However, when forming, it is preferable to provide at a location other than the location covered with the flexible film 3.

In this embodiment, the locking recess 49 formed on the top plate 41 and the locking protrusion 44 connected to the short side wall plate 42 are fitted, but the present invention is not limited to this. However, the locking recess 49 and the locking protrusion 44 can be formed on both sides of the top plate 41, the short side wall plate 42, and the bottom plate 43, and further, for example, the top plate can be divided into two pieces. Alternatively, the locking recess 49 may be formed on one celestial body, and the locking protrusion 44 may be continuously provided on the other top plate.

In the present embodiment, the locking recess 49 and the locking protrusion 44 are formed in the center of the top plate 41 and the short side wall plate 42 in the vertical direction, but the present invention is not limited to this. It can also be formed at the end. Further, in the present embodiment, the locking recess 49 and the locking protrusion 44 are explained as an example in which one set each is formed, but the present invention is not limited to this, and the locking recess 49 and the locking protrusion 44 are Two or more sets of convex portions 44 can also be formed.

In this embodiment, the locking convex portion 44 having a substantially trapezoidal shape has been described as an example, but the locking convex portion 44 of the present invention is not limited to this, and may have a rectangular shape, a semicircular shape, an inverted trapezoid shape, a T-shape, etc. It may be.

Further, the locking convex portion 44 does not need to have the same or similar shape as the locking recess 49 because it is sufficient to fit into at least a portion of the locking recess 49 and lock or hold the locking convex portion 44 .

Although the present embodiment has been described as having the locking piece 45, the present invention is not limited to this, and the locking piece 45 may be omitted, and the locking piece may be long so that it comes into contact with the bottom plate 43. The design may be such that the locking piece can also support the bottom plate 43.

In this embodiment, the locking recess 49 is formed when the locking slope portion 48 is pulled out, but the present invention is not limited to this, and the locking slope portion 48 may be omitted, and the locking slope portion 48 may be omitted. The retaining recess 49 may be formed by notching.

In the present embodiment, the packing fold line d is described as extending perpendicularly to the trunk fold line a, the protrusion fold line b, and the locking fold line c, but the present invention is not limited to this. It is sufficient to connect the left edge of the plate 41 and the right edge of the right short wall plate 42.

In the present embodiment, the sealing portion 5 connected to the top plate 41 has been described as an example, but the present invention is not limited to this, and the sealing portion may be connected to the short side wall plate 42 or the bottom plate 43. can.

Further, in the present embodiment, the sealing portion 5 including the proximal support plate 51, the long side wall plate 52, the distal end support plate 53, and the support tongue piece 54 has been described as an example, but the present invention is not limited to this. The tongue piece 54 can be omitted, and the base end support plate 51 may be omitted and the tip support plate can be inserted toward the internal space of the box from the side wall plate hanging vertically from the top plate, and everything other than the side wall plate can be omitted. Then, the side wall plate may be attached to the bottom plate with adhesive tape.

In this embodiment, the fourth sealing fold line h is all valley-folded at approximately 90 degrees, and the supporting tongue piece 54 is sandwiched between the side edge of the proximal support plate 51 and the side edge of the distal support plate 53. However, the present invention is not limited to this, and the support tongue piece 54 can be mountain-folded at approximately 90 degrees at the sealing fourth fold line h, and in that case, the length of the support tongue piece 54 in the left-right direction is equal to the length of the top plate 41. It is sufficient if it is shorter than the length in the vertical direction.

In this embodiment, the paperboard 20 is valley-folded along the first sealing fold line e, the sealing portion 5 is folded back toward the top plate 41, and the paperboard 20 is adhesively fixed to the top plate 41 using the base end support plate 51. However, the present invention is not limited to this, and the sealing portion 5 may be pressed and fixed by the bottom plate 43 without adhesively fixing the base end support plate 51 and the top plate 41.

In this embodiment, the flexible film 3 is cylindrical, but the present invention is not limited to this, and may have a rectangular shape. It may be bonded or welded on both sides of the fold line d, or it may be bonded or welded on both sides of the packaging fold line d on the outer surface of the bottom plate through the inner surface of the bottom plate. When formed in a cylindrical shape, it is possible to save the trouble of gluing and welding, and when it is bonded and welded to the inner surface, it is possible to avoid the flexible film 3 from tearing and unpacking during transportation. be able to.

1 Packaging box 2 Box body (packaging box)
3 Flexible film (thin film member)
4 Body 41 Top plate (plate-like member)
42 Short side wall plate (plate-shaped member)
43 Bottom plate (plate-shaped member)
44 Locking convex portion 45 Locking piece 46 Cut 47 Recess crease line 48 Locking slope portion 49 Locking recess 5 Sealing portion 51 Base end support plate 52 Long side wall plate (side wall plate)
53 Tip support plate 6 Invoice 7 Band-shaped broken parts 71, 72 Breakable line a Body fold line b Convex fold line c Locking fold line d Packing fold line e Sealing first fold line f Sealing second fold line g Sealing third fold line K Item to be packed

Claims (11)

A packaging box having a rectangular cylindrical body and a pair of sealing parts that seal openings at both ends of the body,
The torso is
three or more plate-like members sequentially connected through the body fold line;
a locking recess provided at one end of the plate member on the one end side constituting the body and cut out from the one end edge toward the other end;
The plate-like member on the other end side constituting the body is connected to the other end edge of the plate-like member on the one-end side by being connected to the other end edge of the plate-like member on the one end side by being fitted into the locking recess. A packaging box characterized by having a locking convex portion that is arranged on a plane and whose outer edge is locked to the inner edge of the locking recess. The packaging box according to claim 1,
A packaging box characterized in that an invoice that is pasted on the delivery item and whose back surface is a sticker is pasted across the plate-like member on the one end side in which the locking recess is formed and the locking protrusion. In the packaging box according to claim 1 or 2,
One end of the plate-like member on the one end side is provided with a pair of cuts extending from one edge toward the other end, and a recessed crease line connecting the tips of the pair of cuts,
The locking recess is formed by bending an area surrounded by the pair of cuts and the crease line inward of the body along the crease line of the recess to form a locking slope portion of the plate-shaped member on the one end side. A packaging box characterized in that it is formed by pulling out of the box. The packaging box according to claim 3,
A packaging box characterized in that a tip of the locking convex portion is locked to a base end of the locking slope portion. The packaging box according to claim 4,
The packaging box is characterized in that a tip end edge of the locking slope portion is locked to an inner surface of a plate-like member opposite to the plate-like member on the one end side. The packaging box according to any one of claims 3 to 5,
The body portion has a locking piece connected to a tip edge of the locking convex portion via a locking crease line,
The packaging box is characterized in that the locking piece is bent toward the inner surface of the locking recess along the locking fold line, and its outer surface is locked to the outer surface of the locking slope. . The packaging box according to any one of claims 1 to 6,
The sealing portion includes a proximal support plate that is connected to the plate member through a first sealing fold line, and a body portion that is connected to the proximal support plate through a second sealing fold line. a side wall plate extending in a direction intersecting with the axial direction of the body , and a tip support plate connected to the side wall plate via a sealing third fold line, and having a U-shape toward the internal space of the body. formed in
The packaging box is characterized in that the inner surfaces of the proximal end support plate and the distal end support plate are in contact with the inner surface of the plate-like member. The packaging box according to any one of claims 1 to 7,
The packaging box is characterized in that the body portion is formed with a band-shaped broken portion sandwiched between a pair of breakable lines extending along the body fold line. The packaging box according to any one of claims 1 to 8,
The body has a packaging fold line connecting one end to the other end,
The plate-like member is capable of being locked to the plate-like member on both sides of the packaging fold line, and capable of covering at least a part of the object to be packed placed on the plate-like member and pressing it against the plate-like member. A packaging box characterized by being provided with a flexible thin film member. The packaging box according to claim 7,
The body has a packaging fold line connecting one end to the other end,
The other plate-like member to which the proximal end support plate is not connected has a flexible material that covers at least a part of the object to be packed placed on the other plate-like member and presses it against the plate-like member. A thin film member is provided,
The thin film member passes through the inner surface side of the other plate member and is adhered or welded to the other plate member on both sides of the packaging fold line on the outer surface side, or is cylindrical and is attached to the other plate member. A packaging box into which a plate-like member is inserted. The packaging box according to claim 10,
A packaging box characterized in that a plate-shaped member other than the other plate-shaped member is formed with a band-shaped break portion sandwiched between a pair of breakable lines extending along the body fold line.

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