JP2020121745A - Packaging box - Google Patents

Abstract

To provide a packaging box capable of supporting a packaging object by the box itself.SOLUTION: A paper packaging box 1 comprises: a square cylindrical body part 4 which extends in the left and right directions; and a closing plate 5 which is connected to the body part 4 via a folding line (d) and covers an open end of the body part 4. The body part 4 is formed in a square cylindrical shape by fixing one end edge extending in the left and right directions of a plate-like member 20 bent by a plurality of lateral fold lines (a) extending in the left and right directions abutted to the other end edge extending in the left and right directions or superposed on an outer surface of the other end part including the other end edge, and has a bottom plate 21 on which a packaging object P is placed, a top plate 23, a pair of first side plates 22, and a vertical fold line (c) formed from the one end edge to the other end edge. The packaging box 1 is further comprises a flexible thin film member locked on both left and right sides sandwiching the vertical fold line (c) of the bottom plate 21, and pressed and fixed to the bottom plate while covering the packaging object P.SELECTED DRAWING: Figure 1

Description

The present invention relates to a packaging box.

Due to the spread of mail-order sales such as online shopping, the transportation of products using a courier service is often used. In the transportation of these products, there is a demand for a packaging tool and a packaging box that can stably transport various packaging objects having different shapes and sizes.

As a packaging tool and a packaging box of this type, conventionally, a packaging tool including a plate-shaped member and a tubular flexible film member that accommodates the plate-shaped member, and an outer box that houses the packaging tool. A packaging box including and is known (see Patent Document 1).

In this wrapping tool, the plate-shaped member has a placing portion on which the object to be packaged is placed, and standing portions arranged on both sides of the placing portion, and a boundary between the placing portion and the standing portion. Is provided with a folding line. Therefore, when the packaging object is packaged by the packaging tool, the packaging object is inserted between the placing portion and the flexible film member, and the standing portions are bent upward from the folding line. As a result, the flexible film member is tensioned, so that the packaging target object is pressed against and supported by the mounting portion by the flexible film member. This wrapping tool is wrapped in an object to be packed, housed in an outer box such as a corrugated board, and transported as a packing box.

Japanese Patent Publication No. 9-501128

However, the packaging tool of Patent Document 1 has a disadvantage that an outer box must be separately prepared.

In view of the above points, an object of the present invention is to provide a packaging box that can support a packaging object by the box itself without separately preparing a packaging tool and an outer box.

In order to achieve such an object, the packaging box of the present invention comprises a rectangular tubular body extending in the left-right direction and a closing plate which is connected to the body via a fold line and covers the open end of the body. And a body part in which the body portion has one end edge extending in the left-right direction of the plate-shaped member bent along a plurality of horizontal fold lines extending in the left-right direction and the other end extending in the left-right direction. A bottom plate on which the object to be packaged is placed, which is formed in a rectangular tube shape by being pressed against the edge or fixed in a state of being superposed on the outer surface of the other end portion including the other end edge. A top plate, a pair of first side plates, and a vertical fold line formed from the one end edge to the other end edge, respectively locked on both left and right sides sandwiching the vertical fold line of the bottom plate, It is characterized by comprising a flexible thin film member that covers the object to be packaged and presses and fixes it to the bottom plate.

In the body portion of the present invention, the plate-shaped member can be formed into a flat plate shape before being bent at the horizontal fold line before being fixed. Then, the plate-shaped plate member can be vertically valley-folded by the vertical fold line formed from the one end edge to the other end edge.

At this time, the bottom plate, which is a part of the plate-shaped member, is provided with flexible thin film members that are respectively locked on the left and right sides of the vertical fold line, and the bottom plate is cut along the vertical fold line. When folded, the locking points on both the left and right sides come close to each other, so that a gap is created between the thin film member and the bottom plate that is valley-folded, and the packaging object pressed against the bottom plate by the thin film member can be taken out. ..

The above operation is the operation of taking out the object to be packed in the packaging box of the present invention, but if the operation is performed in the reverse order, the operation of packing the object to be packed is performed. That is, the packaging box of the present invention inserts the packaging object by making a gap between the bottom plate and the thin film member by valley-folding the plate-shaped member along the vertical fold line, and then the plate-shaped member is folded along the horizontal fold line. Then, the one end edge and the other end edge are butted against each other and fixed, or the one end edge is fixed in a state of being superposed on the outer surface of the other end portion to form the barrel portion in a tubular shape. And finally, it can be made into a box-like shape by bending the closing plate connected to the body part along the fold line to cover the open end of the body part.

According to the packaging box of the present invention, when the plate-shaped member folded along the vertical fold line is bent along the horizontal fold line, the vertical fold line intersecting the horizontal fold line is restored from the valley fold state. As a result, the thin film member approaches the bottom plate while being stretched by the left and right locking positions being separated from each other in the left and right direction, and the packaging target is pressed and fixed to the bottom plate.

As described above, according to the packaging box of the present invention, the packaging object can be supported by the box itself.

Further, in the packaging box of the present invention, the closing plate is a folded-back portion that is overlaid on the inner surfaces of the top plate and the bottom plate from the left and right edges of the top plate and the bottom plate, and the folded-back part and the bottom plate on the top plate side. It is preferable to have a second side plate that connects the folded portion on the side.

In a packaging box with this configuration, the closure plate has a U-shape that is recessed from the left and right edges of the top and bottom plates toward the inside of the box, so that the closure plate is bonded when a load is applied from above and below. Even if it does not exist, it is possible to reduce unintended opening and improve the strength.

Further, in the packaging box of the present invention, the closing plate is continuously provided to the top plate or the first side plate, and the thin film member extends in a direction intersecting the left-right direction and surrounds the periphery of the bottom plate. It is preferable that the bottom plate is locked by the left and right edges.

In the packaging box having this configuration, since the left and right edges of the bottom plate are exposed, the plate-shaped member that is valley-folded along the vertical crease line is inserted into the tubular thin-film member, and the region of the bottom plate of the plate-shaped member is inserted. The thin film member can be pulled in the left-right direction by the left and right edges of the cover and the bottom plate.

Therefore, according to the packaging box having this configuration, since it is not necessary to bond the thin film member to the bottom plate to lock the thin film member, the manufacturing can be facilitated.

Further, in the packaging box having this configuration, the closing plate, the folding portion on the top plate side which is continuously provided to the left and right end edges of the top plate through a fold line and is adhered to the inner surface of the top plate, A second side plate that is continuously provided from the tip of the folded portion on the top plate side through a fold line and extends toward the bottom plate, and an adjacent left and right end of the bottom plate that is continuously provided from the tip of the second side plate through the fold line. It is preferable to have the bottom plate-side folded-back portion extending toward the edge.

This closing plate can be formed into a flat plate shape before being bent at the fold line. However, since the folding portion on the top plate side that constitutes a part of the closing plate is adhered to the top plate, the other second side plate and bottom plate side The folding part of is also folded in contact with the inner surface of the top plate.

Therefore, according to the packaging box having the above configuration, the width before packaging can be reduced to the same extent as that of the plate member.

The perspective view of the packaging box which concerns on 1st Embodiment of this invention. The development view of the paperboard which comprises the packaging box of FIG. The development view of the packaging box of FIG. 1. The 1st perspective view which shows the packaging process of the packaging box of FIG. The 2nd perspective view which shows the packaging process of the packaging box of FIG. The 3rd perspective view showing the packaging process of the packaging box of Drawing 1. The development view of the packaging box concerning a 2nd embodiment of the present invention. The development view of the packaging box concerning a 3rd embodiment of the present invention.

1st Embodiment of this invention is described based on FIGS.

As shown in FIG. 1, the packaging box 1 of the first embodiment has a substantially rectangular parallelepiped shape and includes a paperboard 2 and a flexible film (thin film member) 3. The packaging box 1 holds the packaging target P between the paperboard 2 and the flexible film 3.

The paperboard 2 has a rectangular tubular body portion 4 extending from the depth direction to the front direction (corresponding to the “left-right direction” of the present invention), and a closing plate 5 covering the open end of the body portion 4. The body portion 4 is formed by bending a plate-shaped member, which will be described later, into a rectangular tubular shape, and abutting the edges on the upper side and affixing them with an adhesive tape 6.

The adhesive tape 6 is a paper-made adhesive tape having a predetermined width with an adhesive applied to the back surface, and is known as craft tape, gum tape, etc. that can be torn by an operator without using a cutting tool such as a cutter. Is used.

The paperboard 2 is made of, for example, cardboard or corrugated paperboard. As shown in FIG. 2, the paperboard 2 has a rectangular plate-like member 20 and is provided continuously with the upper and lower ends of the left and right edges of the plate-like member 20. It consists of four closing plates 5. The left and right directions in the present invention and the present specification are based on the left and right directions in FIG.

The plate-shaped member 20 includes a bottom plate 21, a pair of first side plates 22 that are respectively connected to the upper and lower edges of the bottom plate 21 via horizontal fold lines a, and a horizontal fold line b at the leading edge of each first side plate 22. And a top plate 23 that is continuously provided via. That is, the plate member 20 is a rectangular member including the bottom plate 21, the first side plate 22, and the top plate 23.

A vertical fold line c is formed on the plate member 20 from the upper edge to the lower edge.

The closing plate 5 is continuously provided on the left and right edges of the top plate 23 via the fold line d, and on the top edge of each top plate fold portion 51 via the fold line e. Folded to the second side plate 52, the bottom plate folding-back portion 53 continuously provided at the leading edge of each second side plate 52 via the fold line f, and the edge extending on the extension of the horizontal fold line b of each second side plate 52. And a tongue piece 54 continuously provided through the line of sight g.

In the paperboard 2, the vertical length of the bottom plate 21 and the vertical length of both top plates 23 are the same or substantially the same. Further, the vertical length of the first side plate 22 and the lateral length of the second side plate 52 are the same or substantially the same. Further, the shape of the top plate folding part 51 and the shape of the bottom plate folding part 53 are the same or substantially the same. Further, the horizontal lengths of the top plate folded-back portion 51 and the bottom plate folded-back portion 53 and the vertical length of the tongue piece 54 are the same or substantially the same.

Further, in the paperboard 2, the horizontal fold lines a and b, the vertical fold line c, and each of the other fold lines may be formed, for example, by providing regular ruled lines or half cuts on the front surface, and the back surface (not shown). ), a bent groove may be provided intermittently to form a perforation.

As shown in FIG. 3, the paperboard 2 has the closing plate 5 folded back along the fold line d to the surface side of the top plate 23 in FIG. 2 (the inner surface side in the case of a box shape), and the top plate folding portion 51. And the top plate 23 are bonded to each other in the bonding region G1.

The flexible film 3 has a tubular shape, and the paperboard 2 is inserted from one opening in the direction along the vertical fold line c. The flexible film 3 is formed of, for example, a flexible film made of a synthetic resin film such as polyethylene terephthalate, polyethylene, polypropylene, polycarbonate, and polyvinyl chloride.

The flexible film 3 needs to be formed so as to cover at least the packaging target P in the axial direction, and in the present embodiment, the flexible film 3 is formed to have a length that substantially covers the bottom plate 21.

The length of the flexible film 3 in the circumferential direction is designed to be equal to or slightly larger than the outer circumference of the bottom plate 21 in the left-right direction so that the bottom plate 21 can be housed. Since the flexible film 3 is flexible and can be expanded and contracted, and the paperboard 2 can be folded along the vertical fold line c, the flexible film 3 is placed from the outer periphery of the paperboard 2 in the lateral direction. It can be designed to be slightly smaller. That is, the length of the flexible film 3 in the circumferential direction can be appropriately selected depending on the size of the packaging target object P to be stored.

Next, with reference to FIGS. 4 to 6, a procedure of packaging the packaging target P using the packaging box 1 will be described.

First, as shown in FIG. 4, the paperboard 2 is folded in a valley fold along the vertical fold line c, and the packaging object P is inserted between the bottom plate 21 of the paperboard 2 and the flexible film 3.

Next, as shown in FIG. 5, the paperboard 2 folded along the vertical fold line c is restored to a flat plate shape against the tension of the flexible film 3. As a result, the flexible film 3 is pulled by the left and right end edges of the bottom plate 21 and becomes tense, and the packaging target P is pressed against the bottom plate 21. Thereby, the packaging target P is fixed at a predetermined position.

Next, each first side plate 22 is bent along the horizontal fold line a toward the surface side of the bottom plate 21 to stand up.

Since the vertical fold line c and the horizontal fold line a intersect, both fold lines cannot be bent at the same time. Therefore, if the paperboard 2 folded along the vertical fold line c is forcibly folded along the horizontal fold line a, the previously folded vertical fold line c is automatically restored to its original unfolded state. Be restored.

Therefore, that is, as shown in FIG. 5, from the state in which the packaging object P is inserted between the bottom plate 21 of the paperboard 2 and the flexible film 3, the first side plate 22 is moved to the bottom plate along the horizontal fold line a. By bending and standing up on the surface side of 21, the work of folding back the vertical fold line c can be omitted.

Next, as shown in FIG. 5, each closing plate 5 is bent into a "U" shape. Specifically, the second side plate 52 is bent along the fold line e at a substantially right angle to the top plate folding portion 51, and the bottom plate fold portion 53 is bent at a substantially right angle to the second side plate 52 along the fold line f. Fold. Further, the tongue piece 54 is bent along the fold line g at a substantially right angle to the top plate turn-back portion 51, the second side plate 52, and the bottom plate turn-back portion 53.

Next, as shown in FIG. 6, each top plate 23 is bent along the horizontal folding line b so as to face the bottom plate 21, and the top edges of the top plates 23 (the “one end edge” and the “one end edge” in the present invention) are bent. Match the other edge.). Then, the top end portions of the respective top plates 23 are adhered with the adhesive tape 6 having a predetermined width along the both end edges to seal the box.

As described above, as shown in FIG. 1, the packaging of the packaging object P using the packaging box 1 is completed.

According to the packaging box 1 described above, the packaging object P can be supported by the box itself without separately preparing the packaging tool and the outer box.

In addition, in the packaging box 1, the top plate turn-back portion 51 connected to the second side plate 52 is adhered to the top plate, and the bottom plate turn-back portion 53 and the tongue piece 54 that are also connected continuously are the bottom plate 21 and the first side plate 22, respectively. Therefore, even if a load is applied in the vertical direction, it is possible to prevent the closing plate from being unintentionally opened and to improve the strength.

Further, as shown in FIG. 3, the paperboard 2 of the packaging box 1 is reduced in size to the same extent as the rectangular plate-like member 20 by folding and adhering the closing plate 5, and therefore, before packaging. It is suitable for transportation in the state of semi-finished products.

Since the left and right edges of the bottom plate 21 of the packaging box 1 are exposed, the bottom plate 21 is inserted into the flexible film 3 and the flexible film 3 is pulled in the left and right direction by the left and right edges of the bottom plate 21. Therefore, it is not necessary to bond the flexible film 3 to the bottom plate 21.

Therefore, the packaging box 1 is easy to manufacture, and a plurality of flexible films 3 having different circumferential lengths are prepared for one paperboard 2 in accordance with the size of the packaging object P. Then, the flexible film 3 can be selected and used.

The packaging box 1 can be transported as it is, but it is also possible to accommodate two or more packaging boxes 1 in a larger packaging box and transport it.

Next, a second embodiment of the present invention will be described based on FIG. Since the packaging box 100 (not shown) according to the second embodiment is different from the first embodiment only in the shape of the paperboard, the shape of the paperboard will be described, and other duplicate description will be omitted.

The paperboard 102 that configures the packaging box 100 includes a rectangular plate-shaped member 120 and two closing plates 105 that are continuously provided above the left and right edges of the plate-shaped member 120.

The plate-shaped member 120 is provided with a bottom plate 121, a first side plate 122 continuously provided on the upper end edge of the bottom plate 121 via a horizontal fold line a, and a first side plate 122 continuously provided on the tip edge of the first side plate 122 via a horizontal fold line b. The top plate 123, the first side plate 122 continuously provided on the leading edge of the top plate 123 via the lateral fold line b, and the first side plate 122 continuously provided on the center of the leading edge of the first side plate 22 via the fold line h. And a trapezoidal insertion piece 124. Further, the plate-shaped member 120 has an inner plate 125 that is continuously provided on the lower edge of the bottom plate 121 via a horizontal fold line a.

At a boundary between the bottom plate 121 and the inner plate 125, a substantially U-shaped cut 126 having both ends on the boundary line and protruding toward the inner plate 125 is formed. The length of the cut 126 in the vertical direction is approximately the same as the thickness of the paperboard 102, and the length in the horizontal direction is approximately the same as the insertion piece 124.

A horizontal fold line a on the boundary line between the bottom plate 121 and the inner plate 125 extends in the left-right direction from both ends of the cut 126.

A vertical fold line c is formed on the plate member 120 from the upper edge of the insertion piece 124 to the lower edge of the inner plate 125.

The closing plate 105 is connected to the left and right edges of the top plate 123 via the fold lines d, and the top plate turn-back portions 151 are connected to the leading edges of the top plate turn-back portions 151 via the fold lines e. A second side plate 152, a bottom plate folding-back portion 153 continuously provided at the leading edge of each second side plate 152 via a fold line f, and an end edge extending on an extension of the horizontal fold line b of each second side plate 152. And a tongue piece 154 continuously provided through the line of sight g.

The paperboard 102 is formed with a zipper 107 that passes through the upper end side of the top plate 123 and connects the leading edges of both top plate turn-back portions 151.

Both ends of the zipper 107 are on the boundary line between the top plate 123 and the top plate turn-back portion 151, and a pair of break start portions formed by a substantially U-shaped cut protruding toward the top plate turn-back portion 151. 171 and two breakable lines 172 extending in the left-right direction from both ends of the break start portion 171.

The fold lines d extend in the vertical direction from both ends of each rupture start portion 171, and the fold line d is not formed on the rupture start portion 171.

The breakable line 172 is a cut formed intermittently, and each unit cut is bent toward the breakable line 172 whose end on the break start portion 171 side faces to form an approximate “F” shape. Has been formed.

In the packaging box 100, the closing plate 105 of the paper board 102 described above is folded back to the inner surface of the top plate 123 along the fold line d, and the top plate folding back portion 151 and the top plate 123 are bonded together in the bonding region G2 to provide flexibility. The packaging preparation is completed by inserting the film 3 and covering the bottom plate 121.

When packaging the packaging target P in the packaging box 100, first, the plate member 120 is bent along the vertical fold line c and the packaging target P is inserted between the bottom plate 121 and the flexible film 3 to form the bottom plate. By raising the first side plate 122 and the inner side plate 125 that are continuously provided to the 121, the packaging object P is pressed and fixed to the bottom plate 121 by the flexible film 3. At this time, when the inner plate 125 is bent with respect to the bottom plate 121 along the horizontal fold line a and is erected, a rectangular insertion hole is opened in the inner plate 125 along the cut 126.

Next, the closing plate 105 is preliminarily bent along the fold lines e, f, g, and the top plate 123 is valley-folded along the horizontal fold line b, and the first side plate 122 connected to the top plate 123 is folded along the horizontal fold line b. Then fold the valley.

At this time, the insert piece 124 connected to the first side plate 122 is previously bent along the fold line h, and the inner side plate 125 is overlapped with the first side plate 122 on the outer surface of the inner side plate 125. The insertion piece 124 is inserted into the insertion hole formed in the.

As a result, the paperboard 102 is assembled into a box shape.

As described above, the packaging box 100 can be assembled in a box shape without the adhesive tape 6.

Further, since the packaging box 100 has the zipper 107 formed on the top plate 123, it is easy to unpack.

Moreover, since the fold line d is not formed in the break start portion 171 of the zipper 107, when the top plate turn-back portion 151 is turned back along the fold line d to the inner surface of the top plate 123, the top-sheet turn-back portion 151 is formed. Since it comes out of the top plate 123 and extends from the top plate 123, it is easy to grip when the zipper 107 breaks.

Further, since the zipper 107 is formed symmetrically, it can be unpacked from either the left or right side.

Further, the breakable line 172 of the zipper 107 is formed symmetrically with the top plate 123 in the top plate turn-back portion 151 with the break start portion 171 interposed therebetween. Therefore, even if the entire top plate folding part 151 is adhered to the top plate 123, when the breakable line 172 formed on the top plate 123 is broken, the breakable line 172 of the top plate folding part 151 is broken. Since they can be broken at the same time, they can be opened by the zipper 107.

Next, a third embodiment of the present invention will be described based on FIG. Since the packaging box 200 (not shown) according to the third embodiment is different from the first embodiment only in the shape of the paperboard, the shape of the paperboard will be described, and other duplicate description will be omitted.

The paperboard 202 that configures the packaging box 200 includes a rectangular plate-shaped member 220 and four closing plates 205 that are connected to the upper and lower ends of the left and right edges of the plate-shaped member 220.

The plate-shaped member 220 includes a bottom plate 221, a pair of first side plates 222 connected to the upper and lower edges of the bottom plate 221 via lateral fold lines a, and a horizontal fold line b at the leading edge of each first side plate 222. And a top plate 223 that is continuously provided via. Further, the top end of each top plate 223 is provided with meshing parts 280 and 290 for meshing the end parts with each other. Specific configurations of the meshing portions 280 and 290 will be described later.

The plate-shaped member 220 is formed with a vertical fold line c that connects both front end edges of each top plate 223.

The closing plate 205 is provided with second side plates 252 that are connected to the left and right end edges of each top plate 223 via fold lines i, and folds that are connected to the leading edge of each second side plate 252 via fold lines j. And a curved portion 255.

The first side plate 222 and the second side plate 252 are connected by a square-shaped folded portion 256.

The folding portion 256 extends at a valley fold line k at the boundary with the second side plate 252, a fold line l at the boundary with the first side plate 222, and extends 45° from a corner contacting the first side plate 222 and the second side plate 252. A fold line m of a mountain fold is formed.

Next, the meshing portions 280 and 290 will be described.

In the upper top plate 223, a region above the upper ends of the pair of closing plates 205 that sandwich the upper plate 223 is the meshing portion 280. The meshing portion 280 has a center restraint portion 281 provided at the center in the left-right direction, and a pair of outer support portions 282 provided on both left and right sides of the center restraint portion 281. A meshing groove 283 is formed between the central restraining portion 281 and the outer supporting portion 282.

In the lower top plate 223, a region below the lower ends of the pair of closing plates 205 that sandwich the top plate 223 is the meshing portion 290. The meshing portion 290 has a center support portion 291 provided at the center in the left-right direction and a pair of outer restraining portions 292 provided on both left and right sides of the center support portion 291. An engagement groove 293 is formed between the center support portion 291 and the outer restraining portion 292.

The lateral length of the outer support portion 282 and the lateral length of the outer restraining portion 292 are the same or substantially the same. As a result, the horizontal length of the central restraining portion 281 sandwiched between them and the horizontal length of the central support portion 291 are the same or substantially the same. Further, the position of the engagement groove 283 in the left-right direction and the position of the engagement groove 293 in the left-right direction match.

The engagement groove 283 extends in the up-down direction until it makes a right angle contact with an imaginary line connecting the upper ends of the pair of upper closing plates 205, and the engagement groove 293 forms an imaginary line connecting the lower ends of the lower pair of closing plates 205. It extends vertically until it touches at a right angle.

The vertical length of the central holding portion 281 and the vertical length of the outer holding portion 292 are the same or substantially the same. Further, the vertical length of the outer support portion 282 and the vertical length of the central support portion 291 are the same or substantially the same.

In the packaging box 200, the closing plate 205 and the folded portion 256 of the paper board 202 described above are folded back along the fold lines i and 1 to the inner surfaces of the top plate 123 and the first side plate 222, respectively, and the folded portion 256 and the first side plate are folded. 222 is adhered to the adhesive region G3, the flexible film 3 is inserted, and the bottom plate 221 is covered, whereby the packaging preparation is completed.

When packaging the packaging target P in the packaging box 200, first, the plate member 220 is bent along the vertical fold line c, and the packaging target P is inserted between the bottom plate 221 and the flexible film 3 to form the bottom plate. By raising the pair of first side plates 222 connected to the 221 in series, the flexible film 3 presses and fixes the packaging target P to the bottom plate 221.

Next, when each top plate 233 is valley-folded along the horizontal folding line b, the folding portions 256 connected to the second side plate 252 are automatically folded along the folding line m and the valley folding line k. As a result, the fold line m and the valley fold line k act as hinges, so that as the folding portion 256 is folded, the second side plate 252 connected to the folding portion 256 gradually moves from the state of being in contact with the top plate 223 to 90 degrees. It automatically expands toward °.

Further, since the bent portion 255 is pressed against the bottom plate 221 while the second side plate 252 is expanding, it is gradually bent along the inner surface of the bottom plate 221.

Finally, the paperboard 202 is assembled in a box shape by engaging the engagement portions 280 and 290 provided at the tips of the respective top plates 233. Specifically, for the meshing portion 280 and the meshing portion 290, the central supporting portion 291 is superposed on the outer surface of the central supporting portion 291, and the outer restraining portions 292 are superposed on the outer surface of each outer supporting portion 282. The meshing groove 283 is meshed by inserting the meshing grooves 293 into the meshing groove 283.

As described above, the packaging box 200 can be assembled in a box shape without the adhesive tape 6.

Further, the packaging box 200 is easy to unpack because the closing plate 205 is automatically assembled simply by bending the plate-shaped member 220 along the horizontal folding line b.

Hereinafter, modified examples other than the first embodiment to the third embodiment will be described.

In the first embodiment, since the top and bottom ends of the plate-shaped member are separated, the top plates are adhered to each other. However, if the top and bottom ends of the plate-shaped member are separated side plates, the separated side plates. If the lower end of the plate-shaped member is the first side plate and the upper end is the top plate, both can be attached at the ridgeline between the first side plate and the top plate.

In the first embodiment, the case where the top edges of the two top plates are butted and adhered with the adhesive tape has been described as an example, but the total length of the two top plates in the vertical direction is longer than the bottom plate. Alternatively, one of the top plates may be superposed on the outer surface of the other top plate, and may be attached along the leading edge of the one top plate.

Further, if there is superposition, it is not limited to sticking and can be fixed by adhering to each other.

In the first to third embodiments, the vertical fold line c has been described by way of example as being orthogonal to the horizontal fold lines a and b, but the vertical fold line c connects the upper and lower ends of the plate member. It may be inclined with respect to the horizontal folding lines a and b as long as it is longitudinally cut.

In the first embodiment and the second embodiment, as the closing plate 5, a closing plate having a top plate folding portion 51, a second side plate 52, a bottom plate folding portion 53, and a tongue piece 54, which is bent in a gutter shape, will be described as an example. However, the tongue piece 54 may be omitted, and further, the closing plate may be only the second side plate hanging from the top plate.

In the first to third embodiments, the plate member and the blocking plate are bonded to each other in the bonding regions G1 to G3, but the bonding may be omitted.

In the first to third embodiments, the paperboard is only inserted into the flexible film and is not fixed, but the present invention is not limited to this, and the outer surface side of the paperboard and the flexible film are not limited to this. Can also be fixed by an adhesive or heat welding.

In the first embodiment to the third embodiment, the tubular flexible film is described as an example, but the flexible film is not limited to this, and for example, a rectangular flexible film may be provided on the inner surface side of the bottom plate. It is also possible to cover and wind up to the outer surface side and fix with adhesive/heat welding.

Alternatively, a rectangular flexible film can be fixed by adhesive and heat welding at each of the left and right end portions on the inner surface side of the bottom plate. In this case, the flexible film is fixed at the left and right end edges of the bottom plate. Since it is not necessary to pull it, it is also possible to connect blocking plates to the left and right edges of the bottom plate.

In the first embodiment to the third embodiment, the flexible film having a length that substantially covers the bottom plate has been described as an example, but the flexible film has a length that covers at least the packaging target P at least in the axial direction. If it is longer than the bottom plate, it may be longer.

In the second embodiment and the third embodiment, the case in which the body portion can be fixed in a tubular shape only by inserting or meshing has been described as an example, but it is further strengthened by sticking with an adhesive tape after inserting or meshing. You may fix it.

In the second embodiment, the example in which the insertion piece is inserted into the insertion hole provided in the ridgeline between the bottom plate and the inner plate has been described, but the present invention is not limited to this, and the shape and position of the insertion hole/insertion piece are as follows. It can be changed as appropriate.

In the second embodiment, the case where the zipper is formed on the top plate has been described as an example, but the zipper can be omitted.

Also, the zipper of the second embodiment has been described by taking as an example the one that can be broken from either the left or right side by having the pair of break start portions, but the break start portion is provided only on one of the left and right sides and only in one direction. It may be made rupturable. Alternatively, it is also possible to provide a fracture start portion by an “H”-shaped cut formed in the center of the top plate on the left and right sides, and to fracture each from the center in the left-right direction.

Further, the zipper of the second embodiment has been described by taking an example in which the breakable line is formed up to the top plate folding part so that the top plate folding part can be opened even if the whole top plate folding part is bonded to the top plate. If the plate folding part is not bonded in the region corresponding to the zipper on the top plate side, the breakable line of the top plate folding part can be omitted.

In addition, the zipper of the second embodiment is merely an example, and the position and shape can be changed as appropriate. For example, the breaking start portion does not have to extend from the top plate, and the breakable line is simply a straight line or the like. It may be.

In the third embodiment, description has been made by taking an example in which the engaging portions are formed on the opposing top plates, but the engaging portion may be provided on only one of the top plates. Further, the meshing portion may be provided not only at the tip edge of the top plate but also at the upper end of the upper second side plate or the lower end of the lower second side plate.

In the third embodiment, the description has been made by taking an example in which two meshing grooves are formed in each meshing portion, that is, four meshing grooves in total, but at least one meshing groove may be formed. Specifically, one of the top plates is formed to be half the length of the bottom plate in the up-down direction, and the other top plate is formed to be longer than half the length of the bottom plate in the up-down direction to form the engagement groove. By providing one, only the other side of the top plate can be used as the engaging portion. Further, since it is sufficient that there is at least one engaging groove, there may be four or more engaging grooves.

Further, although the meshing groove of the third embodiment has been described by taking as an example the groove extending parallel to the vertical direction, the meshing groove may be inclined as long as it extends from the front end edge toward the base end. Well, it may be bent or curved.

1 Packaging Box 20 Plate Member 21 Bottom Plate 22 First Side Plate 23 Top Plate 3 Flexible Film (Thin Film Member)
4 Body 5 Closure Plate 51 Top Plate Folding Part (Top Part Folding Part)
53 Bottom plate folding part (bottom plate side folding part)
52 Second side plate a Horizontal folding line b Horizontal folding line c Vertical folding line d Folding line e Folding line f Folding line g Folding line h Folding line i Folding line j Folding line k Valley folding line l Folding line m Folding line P Packaging target Stuff

Claims (4)

A box made of paper, comprising a rectangular tubular body extending in the left-right direction, and a closing plate continuously provided to the body via a fold line and covering an open end of the body,
The body portion is configured such that one end edge of the plate-shaped member bent along a plurality of horizontal fold lines extending in the left-right direction is abutted against the other end edge extending in the left-right direction or the other end including the other end edge. It is formed in a rectangular tube shape by being fixed to the outer surface of the part in a state of being overlapped, and has a bottom plate on which a packaging object is placed, a top plate, a pair of first side plates, and the one side. Having a vertical fold line formed from one edge to the other edge,
A packaging box comprising a flexible thin film member that is locked on both left and right sides of the bottom plate with the vertical fold line in between and covers the object to be packaged and presses and fixes it to the bottom plate. The packaging box according to claim 1,
The closing plate connects a folded-back portion that overlaps the left and right edges of the top plate and the bottom plate on the inner surfaces of the top plate and the bottom plate, and connects the folded-back portion on the top plate side and the folded-back portion on the bottom plate side. A packaging box having two side plates. The packaging box according to claim 1,
The closing plate is connected to the top plate or the first side plate,
The packaging box, wherein the thin film member is a tubular body that extends in a direction intersecting the left-right direction and surrounds the periphery of the bottom plate, and is locked by the left and right edges of the bottom plate. The packaging box according to claim 3,
The closing plate is provided on the left and right edges of the top plate through a crease line and is bonded to the inner surface of the top plate from the folding part on the top plate side, and from the tip of the folding part on the top plate side. A second side plate that is continuously provided through a fold line and extends toward the bottom plate, and the bottom plate-side fold-back that is provided continuously from the tip of the second side plate and that extends toward the adjacent left and right edges of the bottom plate. And a packaging box.

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