JP7254494B2 - packaging box - Google Patents

Description

Article 30, Paragraph 2 of the Patent Act applied.

TECHNICAL FIELD The present invention relates to a packaging box having a lid that opens and closes one end of a cylindrical body.

Conventionally, a rectangular lid piece and a pair of side flaps are extended from one end of a cylindrical body having four side surfaces, and an insertion piece is extended from the tip of the lid piece. There is a packaging box in which a lid piece is superimposed on the outside of a folded box, and an insertion piece is inserted into the inside of a cylindrical body to form a lid portion.

For example, in FIG. 1 of Patent Document 1, a pair of cuts are provided at both ends of the boundary between the lid piece and the insertion piece, and in the assembled state, the ends of the side flaps are inserted into the cuts and engaged, and the lid is opened. A structure is described in which the strips are held closed (hereinafter referred to as the first structure). The insert piece of the first structure has a width shorter than that of the lid piece. In addition, the cut is slightly shifted toward the leading end of the insertion piece from the crease line separating the cover piece and the insertion piece so that the end of the side flap can be deeply inserted into the cut and firmly engaged. ing.

In FIG. 2 of Patent Document 1, a pair of locking projections are provided on both left and right sides of the insertion piece so as to protrude beyond both side edges of the lid piece, and a pair of locking projections are provided at two corners of the cylindrical body. A structure (hereinafter referred to as a second structure) is described in which a receiving portion is provided and, in an assembled state, the locking protrusion engages with the locking receiving portion to hold the lid piece in a closed state. The locking receiving portion of the second structure is provided, for example, by a hole formed by notching the vicinity of the corner portion of the cylindrical body in a U-shape.

Japanese Patent Application Laid-Open No. 2001-301741

However, in the first structure described in Patent Document 1, in the assembled state, a gap is generated between the insertion piece and one side surface of the cylinder where the insertion piece is adjacent, so that one end of the cylinder is It is not completely closed and dust can easily enter. In the second structure, the engaging protrusions of the insertion pieces and the engaging receiving portions of the cylindrical body protrude to the side of the cylindrical body in the assembled state. This protruding part becomes a hindrance when displaying the Furthermore, since the through hole formed by the engagement receiving portion also appears on the side of the cylindrical body, it is easy for dust to enter. Moreover, the appearance as a single box body is not good.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a packaging box in which an insertion piece is firmly engaged with a side flap in an assembled state and in which a gap does not occur in the lid portion. do.

The present invention comprises an elastic box-forming piece forming a cylinder having four sides, a rectangular lid piece and a pair of side flaps extending from one end of the cylinder , and the lid An insertion piece is extended from the tip of the piece, and in the assembled state, the lid piece is superimposed on the outer side of the side flap, and the insertion piece is inserted into the cylindrical body to form a lid portion. It is a packaging box that The insertion piece is separated from the lid piece by a pair of cuts extending inward from both ends of the base end and an insertion crease line provided to straightly connect the tips of the pair of cuts. A pair of engaging portions of the insert piece, which is a portion separated from the lid piece by the pair of cuts, has a length between the edges of each side on the side surfaces of the cylindrical body facing each other and It is longer than the interval between the inner surfaces of the side surfaces located on both sides of the lid piece, and has a shape in which each tip corner is chamfered .

When the packaging box is assembled, the insertion piece is folded along the insertion folding line and inserted into the cylindrical body. The central portion, which is a portion other than the pair of engaging portions, is elastically pressed against the inside of one side surface of the cylindrical body and overlaps, and the pair of engaging portions are overlapped by the end edges of the cylindrical body. It is locked to the inside of the other side surface, is arranged obliquely inside the corner where the one side surface and the other side surface are continuous, and the ends of the side flaps are inserted into the pair of cuts to be engaged. Then, the opening of the cylindrical body is closed by the lid piece.

Further, the pair of engaging portions has a shape in which each side edge protrudes outward beyond both side edges of the lid piece. Further, the pair of engaging portions of the insertion piece are chamfered at their leading end corners. It is preferable that the box-forming piece is made of a base material such as a synthetic resin having elasticity to such an extent that the engaging portion of the insertion piece does not break in the assembled state.

The packaging box of the present invention has a simple structure and can be easily assembled. In addition, in the assembled state, the insertion piece is firmly engaged with the side flap to form a stable lid portion, and since there is no gap in the lid portion, it is difficult for dust to enter.

It is the expansion view (a) which looked at the box formation piece which comprises one Embodiment of the packaging box of this invention from the surface side, and the figure (b) which expanded a part of cover piece, and an insertion piece. The perspective view (a) which shows the state in the middle of the assembly of the packaging box of this embodiment. It is a perspective view (b) which shows an assembled state. It is the top view (a) which shows the assembly state of the packaging box of this embodiment, and the top view (b) which saw through the cover piece.

An embodiment of the packaging box of the present invention will be described below with reference to the drawings. The packaging box 10 of this embodiment is a substantially rectangular parallelepiped box shown in FIG. .

FIG. 1(a) is a developed view of the box-forming piece 12 seen from the surface side, and the box-forming piece 12 has rectangular side plates 14, 16, 18, and 20 connected in parallel to each other. ing. The side plates 14, 16 and 20 have the same length in the width direction perpendicular to the connection direction, but the side plate 18 is slightly longer than the other side plates 14, 16 and 20 and protrudes upward (protrusion Part 18a). The side plates 14 and 18 are long and substantially equal in length in the connecting direction, and the side plates 16 and 20 are short and substantially equal in length.

A glue piece 22 is extended from the edge of the side plate 14 opposite to the side plate 16 and glued to the surface of the side plate 20 in the assembled state. The glued piece 22 and the side plates 14, 16, 18, 20 are separated by folding lines 24, 26, 28, 30, respectively.

The projecting portion 18a of the side plate 18 is a portion for widening the space for displaying information and providing a hooking portion for hanging on a hook. It can have the same shape as the side plate 14 .

A rectangular cover piece 32 is separated by a crease line 34 and extends from one end of the side plate 14 in the direction perpendicular to the connection direction (the end on the side where the projecting portion 18a is provided). there is The extension length of the lid piece 32 is substantially the same as the length of the side plates 14 and 20 in the connecting direction. Further, an insertion piece 36 extends from the tip of the lid piece 32 .

As shown in FIG. 1(b), the insertion piece 36 is provided so as to straightly connect a pair of cuts 38, 39 extending inward from both ends of the base end and the tips of the pair of cuts 38, 39. It is separated from the lid piece 32 by the folding line 40 for insertion. A pair of engaging portions 42, 44 of the insertion piece 36 separated from the lid piece 32 by a pair of notches 38, 39 have rounded tip corners and rounded edges 42a, 42a and 44b on each side. 44a protrude outward beyond both side edges of the lid piece 32. As shown in FIG. The central portion 46 is a portion of the insertion piece 36 other than the pair of engaging portions 42 and 44 .

A deformed trapezoidal first bottom piece 48 is separated by a folding line 50 and extends from the end of the side plate 14 opposite to the folding line 34 . The extension length of the first bottom piece 48 (the length from the crease line 50 to the edge 48a parallel to the crease line 50) is such that the edge 48a exceeds the center line of the bottom when the packaging box 10 is assembled. length is set. In the middle of the inclined side of the first bottom piece 48 near the side plate 16, a substantially triangular glued piece 52 is separated by a folding line 54 and extended. The length from the crease line 50 to the base end portion of the glued piece 52 on the side of the end portion 48a is set to a length that is positioned near the center line of the bottom portion of the packaging box 10 in the assembled state. A portion of the first bottom piece 48 adjacent to the end 48a of the glued piece 52 has a small notch 56 that engages with a notch 74 of the second bottom piece 66, which will be described later, to maintain assembly of the bottom. is provided.

A trapezoidal side flap 58 extends from the edge of the side plate 16 adjacent to the crease line 34 and is delimited by the crease line 60 . The side flap 58 has a slightly bulging side edge near the projecting portion 18a, and this portion serves as an edge 58a that enters the notch 39 in the assembled state. A substantially triangular flap 62 extends along a folding line 64 at the end of the side plate 16 opposite to the folding line 60 .

A deformed trapezoidal second bottom piece 66 is separated by a folding line 68 and extends from the end of the side plate 18 opposite to the projecting portion 18a. The extension length of the second bottom piece 66 (the length from the crease line 68 to the edge 66a parallel to the crease line 68) is such that the edge 66a exceeds the center line of the bottom when the packaging box 10 is assembled. length is set. Approximately triangular glued pieces 70 are separated by folding lines 72 and extend from the middle of the inclined side of the second bottom piece 66 near the side plate 20 . The length from the crease line 68 to the base end of the glued piece 70 on the side of the end 66a is set to a length that is positioned near the center line of the bottom when the packaging box 10 is assembled. A portion of the second bottom piece 66 adjacent to the end 66a of the glued piece 70 is provided with a notch portion 74 that engages with the notch portion 56 of the first bottom piece 48 in order to maintain assembly of the bottom portion. ing.

A trapezoidal side flap 76 extends along a fold line 78 from the end of the side plate 20 adjacent to the projecting portion 18a. The side flap 76 has a slightly bulging side edge near the projecting portion 18a, and this portion serves as an edge 76a that enters the notch 38 in the assembled state. A substantially triangular flap 80 extends along a folding line 82 at the end of the side plate 20 opposite to the folding line 78 .

Next, an example of a method for assembling the packaging box 10 of this embodiment will be described. FIG. 2 shows the front side of the box-forming piece 12. Hereinafter, the folding method in which the front side of the box-forming piece 12 is convex is referred to as forward folding, and the folding method in which the back side is convex is referred to as reverse folding. called.

First, the folding lines 50, 64, 68, and 82 are folded forward, and then the folding line 54 of the glued piece 52 and the folding line 72 of the glued piece 70 are reversely folded. Then, glue is applied to the back surface of the glued piece 52, and the crease line 26 is folded forward. As a result, the back surface of the glue piece 52 is glued to the front surface of the flap 62 . Next, glue is applied to the back surface of the glued piece 22, and after applying glue to the back surface of the glued piece 70, the folding line 30 is folded forward, and the glued piece 22 is pasted on the front side of the side plate 20. match. As a result, the back surface of the glued piece 70 is glued to the surface of the flap 80 , and the back surface of the glued piece 22 is glued to the surface of the side plate 20 . The box-forming piece 12 is shipped in this folded state.

Next, in a factory or the like where products are packaged, each of the folding lines 24, 26, 28, and 30 is folded forward at 90 degrees, and a square cylindrical body composed of the side plates 14, 16, 18, and 20 and the glued piece 22 is formed. An operation to form 84 is performed. Then, the first bottom piece 48 is pulled up from the side plate 14 together with the flap 62 and folded at a right angle along the crease line 50. folded. Then, the notch portion 56 of the first bottom piece 48 and the notch portion 74 of the second bottom piece 66 are engaged with each other, and the bottom portion 86 is automatically formed to prevent it from reversing, resulting in the state shown in FIG. 2(a). Become.

After the product or the like is put in through the opening on the side of the lid piece 32, the side flap 58 is normal-folded at 90 degrees along the crease line 60, and the side flap 76 is normal-folded at 90 degrees along the crease line 78.例文帳に追加Then, the cover piece 32 is positively folded at 90 degrees along the crease line 34, the insertion piece 36 is positively folded at 90 degrees along the insertion crease line 40, and the insertion piece 36 is placed inside the cylindrical body 84 (side plate 18 ), a lid 88 is formed. The assembled state shown in FIG. 2(b) is now achieved, and the packaging is completed.

FIG. 3(b) shows the state of the insertion piece 36 in the assembled state. The central portion 46 of the insertion piece 36 overlaps the inner side of the side plate 18 (one side surface of the cylindrical body 84 ), and no gap is generated between the central portion 46 and the side plate 18 . The engaging portion 42 of the insertion piece 36 is positioned inside the corner where the side plate 18 and the side plate 20 are continuous with the edge 42a locked inside the side plate 20 (the other side surface of the cylindrical body 84). placed diagonally on the Then, the end portion 76a of the side flap 76 is deeply inserted into the notch 38, and the engaging portion 42 is firmly engaged with the side flap 76.例文帳に追加

Similarly, the engaging portion 44 of the insertion piece 36 has an edge 44a that is engaged with the inner side of the side plate 16 (the other side surface of the cylindrical body 84) so that the side plate 18 and the side plate 16 are connected to each other. It is placed diagonally inside the part. Then, the end portion 58a of the side flap 58 enters deeply into the notch 39, and the engaging portion 44 engages the side flap 58 firmly.

Since the pair of engaging portions 42, 44 has a length between the side edges 42a, 44a longer than the distance between the inner surfaces of the side surfaces 16, 20 facing each other of the cylindrical body 84, there is no difference in the assembled state. The insert piece 36 is curved toward the inner side of the side flaps 58 and 76 and securely latched to the side flaps 58 and 76 . At this time, a bending force acts on the boundaries between the engaging portions 42, 44 and the central portion 46. The base material of the forming piece 12 is preferably selected to have elasticity.

As described above, the packaging box 10 has a simple structure and can be assembled easily. In addition, in the assembled state, the insertion piece 36 is firmly engaged with the side flaps 58 and 76 to form a stable lid portion 88, and the opening of the cylindrical body 84 is tightly closed by the lid piece 32, so dust can be removed. is difficult to enter. The pair of engaging portions 42 and 44 of the insertion piece 36 are chamfered at the tip corners, so even if the edges 42a and 44a protrude outward beyond both side edges of the lid piece 32, , is easily inserted between the sides 16,20. The pair of engaging portions 42 and 44 are easily bent along with the insertion, and are reliably locked to the side flaps 58 and 76 .

In addition, the packaging box of the present invention is not limited to the above embodiment. For example, the shape and size of each member can be changed as appropriate according to the contents, and the structure of the bottom can also be changed as appropriate.

10 Packaging box 12 Box forming pieces 14, 16, 18, 20 Side plate 32 Lid piece 36 Insert pieces 38, 39 Notch 40 Insert crease lines 42, 44 Engagement portions 42a, 44a Edge 46 Central portion 58 , 76 side flaps 58a, 76a end portion 84 cylindrical body 88 lid portion

Claims (3)

A rectangular lid piece and a pair of side flaps are extended from one end of a cylindrical body having four side surfaces, which is composed of an elastic box-shaped piece, and an insertion piece extends from the tip of the lid piece. A packaging box in which, in an assembled state, the lid piece is superimposed on the outer side of the folded side flap, and the insertion piece is inserted into the cylindrical body to form a lid portion,
The insertion piece is separated from the lid piece by a pair of cuts extending inward from both ends of the base end and an insertion crease line provided to straightly connect the tips of the pair of cuts. A pair of engaging portions of the insert piece, which is a portion separated from the lid piece by the pair of cuts, has a length between the edges of each side on the side surfaces of the cylindrical body facing each other and The distance between the inner surfaces of the side surfaces located on both sides of the lid piece is longer than the distance between the inner surfaces, and each tip corner is chamfered,
In the assembled state, the insertion piece is bent along the insertion crease line and inserted into the cylindrical body. The central portion, which is a portion other than the joining portion, is elastically pressed to the inner side of one side surface of the cylindrical body and overlapped, and the pair of engaging portions has the end edges that are positioned to the inner side of the other side surface of the cylindrical body. It is locked and arranged obliquely inside a corner where the one side surface and the other side surface are continuous, the ends of the side flaps enter and engage with the pair of cuts, and the tubular body , wherein the opening of the packaging box is closed by the lid piece. 2. The packaging box according to claim 1, wherein the pair of engaging portions has a shape in which each side edge protrudes outward beyond both side edges of the lid piece. 2. The packaging box according to claim 1, wherein the box-forming piece is made of synthetic resin.

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