JP2019119528A - Packing method and packing box - Google Patents

Abstract

To provide a packing method capable of packing an article more easily.SOLUTION: A packing box 1 comprises a bottom cover 2, a lower flap 20a provided continuous with a bottom edge 21a of the bottom cover 2 and foldable relative to the bottom cover 2, a top cover 3, an upper flap 30a provided continuous with a top edge 31a of the top cover 3 and foldable relative to the top cover. An article P is arranged between the bottom cover 2 and the top over 3. The packing box 1 is wrapped with a film 4. For this reason, the film 4 is shrunk. The article P is clamped between the bottom cover 2 and the top cover 3 due to a shrinkage of the film 4. The lower flap 20a and the upper flap 30a are bent and contacted with each other by the shrinkage of the film 4.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a packing method for packing an article using a packing box and a film, and a packing box suitable for the method.

  Generally, articles such as books, CDs, and DVDs are purchased through online shopping, mail order, and television shopping. Such articles are delivered in a packaged state and, depending on the size of the articles, may be deposited at a delivery destination post. The articles are typically packaged such that their contents are not known.

  For example, Patent Document 1 proposes a packing method of packing an article using a packing box and a film. The packing box comprises a case body and a canopy. The case body comprises a bottom lid and flaps provided continuously to the bottom edges of the bottom lid and foldable with respect to the bottom lid. The film is a shrink film.

  An article is placed on the bottom lid of the case body. Each flap is folded until it contacts the side of the article. The canopy is then placed over the case body and the article is placed between the bottom lid and the canopy. The packaging box is then wrapped with shrink film and the shrink film is heat shrunk. This completes the packing of the article.

  According to this packing method, the articles are restrained in the packing box and therefore do not move in the packing box during delivery. In addition, since the article is covered with a packaging box, the contents of the article are prevented from being known to a third party.

JP 2008-56245 A

  However, according to this packing method, the bending of the flap is performed by an arm or a manual operation. If an arm is used, an arm drive mechanism is required. In addition, when the worker bends the flap, the work is very troublesome.

  Therefore, the present invention enables the articles to be packaged more easily in the packaging method for packaging the articles using the packaging box and the film. The present invention also provides a packing box suitable for the packing method.

According to a first aspect of the present invention, there is provided a packing method for packing an article using a packing box and a shrinkable film,
The packing box is
Bottom lid,
A first lower flap provided continuously to the first bottom edge of the bottom lid and foldable with respect to the bottom lid;
With the canopy,
And a first upper flap that is provided continuously to the first ceiling edge of the canopy and is foldable with respect to the canopy.
The packing method is
Placing the article between the bottom lid and the canopy;
Wrapping the packaging box with the film;
Shrink the film,
Sandwiching the article between the bottom lid and the canopy by shrinkage of the film;
The first lower flap and the first upper flap are folded by contraction of the film to bring the first lower flap and the first upper flap into contact with each other.

The first lower flap may include a straight edge.
The first upper flap may include a straight edge.
The packing method is
The first lower flap and the first upper flap may be folded by contraction of the film to bring the leading edge of the first lower flap and the leading edge of the first upper flap into line contact with each other.

The first lower flap is
At least one lower convex portion formed on a front end edge of the first lower flap;
And at least one lower recess formed in a leading edge of the first lower flap.
The first upper flap is
At least one upper convex portion formed on a front end edge of the first upper flap;
And at least one upper recess formed in a leading edge of the first upper flap.
The packing method is
The first lower flap and the first upper flap are folded by contraction of the film to engage the at least one lower protrusion with the at least one upper recess, and the at least one upper protrusion is at least the at least one upper protrusion. Engage in one lower recess.

  The plurality of lower convex portions and the plurality of lower concave portions may be continuously and alternately aligned, and the plurality of upper convex portions and the plurality of upper concave portions may be alternately alternately arranged.

The packing box is further
A second lower flap provided continuously to a second bottom edge opposite to the first bottom edge of the bottom lid and foldable with respect to the bottom lid;
And a second upper flap that is continuous with a second upper edge opposite to the first upper edge of the upper edge and is foldable with respect to the canopy.

The packing method is
The second lower flap and the second upper flap may be folded by contraction of the film to bring the second lower flap and the second upper flap into contact with each other.

  The second lower flaps and the second upper flaps may be provided continuously in a foldable manner with respect to each other.

  A shrink film may be used as the film, and the film may be shrunk by heat.

According to a second aspect of the present invention there is provided a packaging box for use with a shrinkable film for packaging an article,
The packing box is
Bottom lid,
A first lower flap provided continuously to the first bottom edge of the bottom lid and foldable with respect to the bottom lid;
With the canopy,
And a first upper flap that is provided continuously with the first ceiling edge of the canopy and is foldable with respect to the canopy.
The first lower flap is
At least one first lower convex portion formed on a tip edge of the first lower flap;
And at least one first lower recess formed in a leading edge of the first lower flap.
The first upper flap is
At least one first upper convex portion formed on a tip edge of the first upper flap;
And at least one first upper recess formed in the leading edge of the first upper flap.
The at least one first lower projection and the at least one first upper recess are provided to engage with each other when the first lower flap and the first upper flap are bent toward each other,
The at least one first lower recess and the at least one first upper protrusion are provided to engage with each other when the first lower flap and the first upper flap are bent toward each other .

  The plurality of first lower convex portions and the plurality of first lower concave portions may be continuously and alternately arranged, and the plurality of first upper convex portions and the plurality of first upper concave portions may be continuous. You may arrange alternately.

  The at least one first lower protrusion and the at least one first upper protrusion may each have a pointed or rounded tip.

The packing box is further
A second lower flap provided continuously to a second bottom edge opposite to the first bottom edge of the bottom lid and foldable with respect to the bottom lid;
And a second upper flap that is continuous with a second ceiling edge opposite to the first ceiling edge of the canopy and is foldable with respect to the canopy.

  The second lower flaps and the second upper flaps may be provided continuously in a foldable manner with respect to each other.

The second lower flap is
At least one second lower convex portion formed on a front end edge of the second lower flap;
And at least one second lower recess formed in a leading edge of the second lower flap.
The second upper flap is
At least one second upper convex portion formed on a tip edge of the second upper flap;
And at least one second upper recess formed in a leading edge of the second upper flap.
The at least one second lower convex portion and the at least one second upper concave portion are provided to engage with each other when the second lower flap and the second upper flap are bent toward each other. You may Furthermore, the at least one second lower recess and the at least one second upper protrusion are provided to engage with each other when the second lower flap and the second upper flap are bent toward each other. You may

  The plurality of second lower convex portions and the plurality of second lower concave portions may be continuously and alternately arranged, and the plurality of second upper convex portions and the plurality of second upper concave portions may be continuous. You may arrange alternately.

  The canopy and the bottom cover may each be rectangular and may have the same shape.

It is an expanded view of the packing box concerning one embodiment. It is an enlarged view of area | region T of FIG. 3A to 3C are cross-sectional views for explaining the packing method according to one embodiment. FIG. 4A and FIG. 4B are cross-sectional views for explaining the packing method according to one embodiment. It is a sectional view explaining the packing method concerning one embodiment of the present invention. 6A to 6C are diagrams for explaining the operation of the upper and lower protrusions. FIG. 2 is a perspective view of an article packaged with film and the packaging box of FIG. 1; It is an expanded view of the packing box which concerns on other embodiment. It is an expanded view of the packing box which concerns on another embodiment. It is sectional drawing explaining the packing method which concerns on another embodiment. FIG. 10 is a plan view showing a state in which an article is packed by a film and the packing box of FIG. 9; 12A is a sectional view taken along the line S-S in FIG. 11, FIG. 12B is a sectional view taken along the line T-T in FIG. 11, and FIG. 12C is a partial perspective view of the packaging box in FIG. Illustration is omitted). It is a partial side view which shows the state with which the packaging box of FIG. 9 was closed. It is an expanded view of the packing box which concerns on another embodiment. FIG. 15 is a plan view showing a state in which an article is packed by a film and the packing box of FIG. 14; It is an expanded view of the packing box which concerns on another embodiment.

  Hereinafter, the packing box and packing method according to the embodiment of the present invention will be described with reference to the drawings. In each embodiment, the same or similar configurations are denoted by the same reference numerals.

First Embodiment
FIG. 1 is a development view of the packaging box 1. The packing box 1 is made of, for example, paper such as cardboard.

  The packaging box 1 comprises a rectangular bottom lid 2 having first, second, third and fourth bottom edges 21a, 21b, 21c, 21d. The packaging box 1 has a first lower flap 20a provided continuously to the first bottom edge 21a and a second lower flap provided continuously to the second bottom edge 21b opposite to the first bottom edge 21a. And 20b. The packaging box 1 has a third lower flap 20c provided continuously to the third bottom edge 21c and a fourth lower flap provided continuously to the fourth bottom edge 21d opposite to the third bottom edge 21c. And 20d.

  A fold line is formed along the bottom edges 21a-21d. Therefore, the first to fourth lower flaps 20a to 20d can be folded with respect to the bottom lid 2 along the first to fourth bottom edges 21a to 21d, respectively.

  The packaging box 1 includes a rectangular canopy 3 having first, second, third and fourth top edges 31a, 31b, 31c, 31d. The bottom cover 2 and the canopy 3 have the same shape. The packaging box 1 includes a first upper flap 30a provided continuously to the first ceiling edge 31a, and a second upper flap provided continuously to the second ceiling edge 31b opposite to the first ceiling edge 31a. And 30b. The packaging box 1 includes a third upper flap 30c provided continuously to the third upper edge 31c and a fourth upper flap provided continuously to the fourth upper edge 31d opposite to the third upper edge 31c. And 30d.

  A bending line is formed along the ceiling edges 31a-31d. Therefore, the first to fourth upper flaps 30a to 30d can be bent with respect to the canopy 3 along the first to fourth ceiling edges 31a to 31d, respectively.

  The flaps 20a, 20b, 30a, 30b have the same elongated shape as one another. The flaps 20c, 20d, 30c, 30d have the same elongated shape as one another.

  The second lower flap 20b and the second upper flap 30b are provided to be continuous with each other. A fold line is formed along the connection edge 10. The second lower flap 20 b and the second upper flap 30 b can be folded relative to one another along the connecting edge 10.

  The lower flaps 20a, 20c, 20d respectively have straight end edges 200a, 200c, 200d. The upper flaps 30a, 30c, and 30d have straight end edges 300a, 300c, and 300d, respectively.

  The packaging box 1 is provided continuously to both side edges of the first lower flap 20a and both side edges of the second lower flap 20b, and is foldable with respect to the corresponding lower flaps 20a and 20b. , And a second lower protrusion 22b provided continuously to both side edges of the third lower flap 20c and both side edges of the fourth lower flap 20d and foldable with respect to the corresponding lower flaps 20c and 20d.

  The packaging box 1 is provided continuously to both side edges of the first upper flap 30a and both side edges of the second upper flap 30b, and is foldable with respect to the corresponding upper flaps 30a and 30b. , And a second upper projection 32b provided continuously to both side edges of the third upper flap 30c and both side edges of the fourth upper flap 30d and foldable with respect to the corresponding upper flaps 30c, 30d. .

  FIG. 2 is an enlarged view of a region T of FIG. A fold line is formed along the side edges 23a, 23b of each lower flap. Each first lower projection 22a is foldable relative to the corresponding lower flap along the side edge 23a. Each second lower projection 22 b is foldable with respect to the corresponding lower flap along the side edge 23 b. The lower projecting pieces 22a and 22b are formed in a substantially triangular shape or a substantially fan shape. In the state in which the packaging box 1 is expanded, a bowl-shaped lower notch 24 which is narrowed toward the corner of the bottom lid 2 is formed between the adjacent first lower protrusion 22a and second lower protrusion 22b.

  A fold line is formed along the side edges 33a, 33b of each upper flap. Each first upper projection 32b is foldable relative to the corresponding upper flap along the side edge 33a. Each second upper projection 32b is foldable relative to the corresponding upper flap along the side edge 33b. The upper projecting pieces 32a and 32b are formed in a substantially triangular shape or a substantially fan shape. In the state in which the packaging box 1 is expanded, a bowl-shaped upper notch 34 which is narrowed toward the corner of the canopy 3 is formed between the adjacent first upper projection 32a and second upper projection 32b.

  As shown in FIG. 2, a bowl-shaped central notch 11 which is narrowed toward the connection edge 10 is formed between the adjacent first lower protrusion 22 a and the first upper protrusion 32 a.

  The above-mentioned bending line may be, for example, a mark or a perforation formed in the material of the packing box 1 such as a cardboard.

  Next, the packing method is described. First, the packaging box 1 configured as described above and the shrinkable film 4 (see FIG. 3) are prepared. As the film 4, a heat-shrinkable film, that is, a shrink film is used. The film 4 is transparent. An opaque film may be used.

  In the embodiment, the article P to be packaged is, for example, a flat rectangular parallelepiped such as a CD, a DVD, a book, or the like. The packaging box 1 is in an expanded state. The article P is placed on the bottom lid 2. Then, as shown in FIG. 3A, the packaging box 1 is bent along the connection edge 10, the canopy 3 is put on the article P from above, and the article P is disposed between the bottom cover 2 and the canopy 3. At this time, the first to fourth lower flaps 20a to 20d respectively face the first to fourth upper flaps 30a to 30d. This step is performed by a worker or a known device.

  The packaging box 1 is then wrapped with film 4. In the embodiment, the entire packaging box 1 is wrapped by the film 4. This process is performed by a worker or a packaging apparatus.

  The film 4 is then shrunk. In the embodiment where a shrink film is used, the film 4 is heat shrunk. This process is performed by, for example, a shrink tunnel.

  When the film 4 wrapping the packaging box 1 is shrunk, the film 4 adheres to the bottom cover 2, the canopy 3, the lower flaps 20a-20d and the upper flaps 30a-30d. The contraction force of the film 4 acts to close the packaging box 1. As FIG. 3A and FIG. 3B, since the contraction of the film 4 presses the bottom lid 2 and the canopy 3 toward the article P, the article P is sandwiched between the bottom lid 2 and the canopy 3 by the contraction of the film 4 Be

  At the same time, the film 4 bends the lower flaps 20a-20d and the upper flaps 30a-30d due to its contraction force. The first lower flap 20 a is bent toward the first upper flap 30 a along the first bottom edge 21 a with respect to the bottom lid 2 by the contraction force of the film 4. Furthermore, the first upper flap 30a is folded toward the canopy 3 by the contraction force of the film 4 along the first ceiling edge 31a toward the first lower flap 20a. Thereby, as shown in FIG. 3C, the first lower flap 20a and the first upper flap 30a contact each other. In the embodiment, the first lower flap 20a and the first upper flap 30a are folded by the contraction of the film 4 so that the straight leading edge 200a and the straight leading edge 300a make line contact with each other.

  In addition, when the canopy 3 is pressed toward the article P by the shrinkage of the film 4, the second lower flap 20b and the bottom lid 2 are bent relative to each other along the second bottom edge 21b, and the second upper flap 30b and The canopy 3 is folded relative to each other along the second ceiling edge 31 b, and the second lower flap 20 b and the second upper flap 30 b are folded relative to each other along the connecting edge 10.

  As shown in FIGS. 4A and 4B, the third and fourth lower flaps 20c and 20d are also folded along the third and fourth bottom edges 21c and 21d with respect to the bottom lid 2 by the contraction force of the film 4, respectively. Be Furthermore, the third and fourth upper flaps 30c, 30d are also folded along the third and fourth ceiling edges 31c, 31d with respect to the canopy 3 by the contraction force of the film 4, respectively. Thereby, the third lower flap 20c and the third upper flap 30c contact each other, and the fourth lower flap 20d and the fourth upper flap 30d contact each other. In the embodiment, the straight tip edge 200c and the straight tip edge 300c are in line contact with each other, and the straight tip edge 200d and the straight tip edge 300d are in line contact with each other.

  As a result, as shown in FIG. 7, the packaging box 1 is closed by the contraction of the film 4. The article P is packed by the packing box 1 and the film 4.

  According to this packing method, the article P is sandwiched between the bottom cover 2 and the canopy 3 and is restrained by the packing box 1. Therefore, movement of the article P in the packing box 1 during delivery is restricted.

  Since the lower flaps 20a, 20c, 20d and the upper flaps 30a, 30c, 30d are in contact with each other, the article P is rolled between them to prevent the contents of the article P from being known. As in the embodiment, if the tip edges 200a, 200c, 200d and the tip edges 300a, 300c, 300d are in line contact with each other, no gap is formed at all. This more reliably prevents the contents of the article P from being known.

  According to this packing method, the folding of the flap is performed using the contraction of the film 4 when the film 4 contracts and adheres to the packing box 1. Therefore, there is no need for an arm drive mechanism for bending the flap, and a troublesome operation for the operator to bend the flap. That is, the packaging of the article P using the packaging box 1 and the film 4 can be performed more easily.

  The bending angle of the lower flaps 20a-20d and the upper flaps 30a-30d is determined by the height of the article P. The higher the article P, the larger the bending angle. As shown in FIG. 5, any article P having a height up to the sum of the length of the first lower flap 20a and the length of the first upper flap 30a can be accommodated. In the article P of FIG. 5, the lower flaps 20 a-20 d and the upper flaps 30 a-30 d are bent at 90 ° (that is, perpendicular to the bottom cover 2 / canopy 3) by the contraction of the film 4.

  When the low articles P are packaged, the bending angle is less than 90 °. Therefore, when the article P is packed, a gap is generated at the corner of the packaging box 1. The lower protrusions 22a, 22b and the upper protrusions 32a, 32b described above are used to cover this gap. These are described below with reference to FIGS. 6A-6C. In FIGS. 6A to 6C, illustration of the film 4 is omitted.

  As shown in FIGS. 6A and 6B, at the time of bending the upper flap, the adjacent upper protrusions 32a and 32b move together with the corresponding upper flap so as to close the upper notch 34. Similarly, when the lower flap is bent, the adjacent lower protrusions 22a and 22b move together with the corresponding lower flap so as to close the lower notch 24.

  As described above, when the article P is low, the bending angles of the upper flaps 30a-30d and the lower flaps 20a-20d are small. Therefore, when the article P is packed, the upper notch 34 and the lower notch 24 are not completely closed. However, at this time, since the upper notch 34 and the lower notch 24 are narrow and the article P is also low, the contents of the article P can be known through the corners of the packaging box 1 (the upper notch 34 and the lower notch 24) Not practically.

  When the upper and lower notches 34 and 24 are completely closed as shown in FIG. 6B, the article P is completely surrounded by the packing box 1 without any gap as shown in FIG. The contents of the article P can not be known with certainty.

  When the article P is high, the upper flaps 30a to 30d and the lower flaps 20a to 20d are further folded by the contraction of the film 4 even after the upper and lower notches 34 and 24 are closed as shown in FIG. 6B. At this time, as shown in FIG. 6B and FIG. 6C, the adjacent upper protruding pieces 32a and 32b are bent toward the outside of the packaging box 1 along the side edges 33a and 33b, respectively, while their surfaces are gradually combined. Be Similarly, the lower projecting pieces 22a and 22b adjacent to each other are bent outward of the packaging box 1 along the side edges 23a and 23b, respectively, while their surfaces are gradually combined. The upper protrusions 32a and 32b and the lower protrusions 22a and 22b are foldable so as not to disturb the bending of the upper flaps 30a to 30d and the lower flaps 20a to 20d.

Second Embodiment
FIG. 8 shows a development view of the packing box according to the second embodiment. In the first embodiment, the second lower flap 20b and the second upper flap 30b are provided continuously to each other. As shown in FIG. 8, in the packaging box 1 of the second embodiment, the second lower flap 20 b and the second upper flap 30 b are not connected. Therefore, bottom lid 2 and canopy 3 are separated from each other. The second lower flap 20b has a straight tip edge 200b. The second upper flap 30b has a straight tip edge 300b.

  In the packing method of the second embodiment, the article P is placed on the bottom lid 2. Then, the canopy 3 is put on the article P so that the lower flaps 20a to 20d face the upper flaps 30a to 30d, respectively, and the article P is disposed between the bottom cover 2 and the canopy 3. Then, as in the first embodiment, after the packaging box 1 is wrapped by the film 4, the film 4 is shrunk.

  In this embodiment, like the other flaps, the second lower flap 20b and the second upper flap 30b are also folded along the second bottom edge 21b and the second top edge 31b by the contraction force of the film 4, respectively. It contacts each other. That is, the second lower flap 20b and the second upper flap 30b are bent by the contraction force of the film 4 so that their leading edge 200b and leading edge 300b make line contact with each other.

  As a result, the packaging box 1 is closed and the article P is packaged by the packaging box 1 and the film 4. As apparent from the above, in the first embodiment in which the second lower flap 20b and the second upper flap 30b are provided continuously with each other, alignment between the upper flaps 30a-30d and the lower flaps 20a-20d is unnecessary. It is advantageous at a certain point.

Third Embodiment
FIG. 9 shows a development view of the packing box according to the third embodiment. In the embodiment, the lower flaps 20a, 20c, 20d and the upper flaps 30a, 30c, 30d have a wavy shaped leading edge instead of the straight shaped leading edge.

  That is, the first lower flap 20a includes a tip edge, a plurality of lower projections 201a formed on the tip edge, and a plurality of lower recesses 202a formed on the tip edge. The lower convex portion 201 a and the lower concave portion 202 a are continuously and alternately aligned. The first upper flap 30a includes a tip edge, a plurality of upper projections 301a formed on the tip edge, and a plurality of upper recesses 302a formed on the tip edge. The upper convex portions 301a and the upper concave portions 302a are alternately and continuously arranged.

  The third and fourth lower flaps 20c, 20d also respectively include a plurality of lower convex portions 201c, 201d and lower concave portions 202c, 202d which are formed on the tip end edge and are alternately arranged in succession. The third and fourth upper flaps 30c, 30d also include a plurality of upper convex portions 301c, 301d and upper concave portions 302c, 302d, respectively, formed on the tip end edge and continuously and alternately arranged.

  The second lower flap 20b and the second upper flap 30b are provided continuously to each other as in the first embodiment.

  The lower convex portions 201a, 201c, and 201d and the upper convex portions 301a, 301c, and 301d each have a pointed end. Instead of this, the lower convex portions 201a, 201b and 201c and the upper convex portions 301a, 301b and 301c may have rounded tips. The lower recesses 202a, 202c and 202d and the upper recesses 302c, 302c and 302d respectively have shapes that engage (engage with) the above-mentioned protrusions.

  When the first lower flap 20a and the first upper flap 30a face each other, the lower convex portion 201a, the upper concave portion 302a, and the upper concave portion 302a face each other when the first lower flap 20a and the first upper flap 30a face each other The lower concave portion 202a and the upper convex portion 301a are disposed to face each other. That is, the lower convex portion 201a and the upper concave portion 302a are provided so as to engage with each other when the first lower flap 20a and the first upper flap 30a are bent toward each other. The lower concave portion 202a and the upper convex portion 301a are provided so as to engage with each other when the first lower flap 20a and the first upper flap 30a are bent toward each other.

  This arrangement also applies to the lower protrusions 201c and 201d, the lower recesses 202c and 202d, the upper protrusions 301c and 301d, and the upper recesses 302c and 302d of the third and fourth flaps 20c, 20d, 30c, and 30d. It is done.

  Also in this embodiment, the article P is placed on the bottom lid 2. Then, as shown in FIG. 10, the packaging box 1 is bent along the connection edge 10 in the same manner as in the first embodiment, and the article P is disposed between the bottom cover 2 and the canopy 3; The fourth lower flaps 20a, 20c and 20d respectively face the first, third and fourth upper flaps 30a, 30c and 30d. At this time, the lower convex portions 201a, 201c, 201d and the upper concave portions 302a, 302c, 302d face each other, and the lower concave portions 202a, 202c, 202d and the upper convex portions 301a, 301c, 301d face each other. And after packaging box 1 is wrapped by film 4 like the above-mentioned embodiment, film 4 is contracted.

  In this embodiment, as shown in FIG. 11 and FIG. 12, the first lower flap 20a and the first upper flap 30a are bent by the contraction force of the film 4, and the lower convex portion 201a is received by the upper concave portion 302a. While being engaged, the upper convex portion 301a is received by the lower concave portion 202a and engaged with the lower concave portion 202a. This engagement prevents the bottom cover 2 and the canopy 3 from shifting relative to each other.

  In addition, when the bending angle of a flap is less than 90 degrees, a clearance gap is formed between the convex part and recessed part which mutually engage. However, this gap is small, and the contents of the packaged article P are hardly known. When the bending angle is 90 °, the convex portion and the concave portion engage with each other without gap (perfect meshing). As illustrated in FIG. 13, the lower convex portion 201 a and the upper concave portion 302 a engage with each other without gaps, and the lower concave portion 202 a and the upper convex portion 301 a engage with each other without gaps.

  Similarly, the third lower flap 20c and the third upper flap 30c are bent by the contraction of the film 4, and the lower convex portion 201c engages with the upper concave portion 302c, and the upper convex portion 301c engages with the lower concave portion 202c. Engage. The fourth lower flap 20d and the fourth upper flap 30d are bent by the contraction of the film 4, and the lower convex portion 201d engages with the upper concave portion 302d and the upper convex portion 301d engages with the lower concave portion 202d. . By these engagements, the bottom cover 2 and the canopy 3 are more reliably prevented from being shifted relative to each other.

  As a result, the packaging box 1 is closed and the article P is packaged by the packaging box 1 and the film 4.

  In the case of a straight shaped leading edge, the flap may be bent too much and may get inside the packaging box 1. On the other hand, in the case of the tip end of the waveform shape of the third embodiment, this can be prevented.

Fourth Embodiment
FIG. 14 shows a developed view of the packaging box of the fourth embodiment. In the packaging box 1 of this embodiment, as in the second embodiment, the second lower flap 20b and the second upper flap 30b are not connected. Therefore, bottom lid 2 and canopy 3 are separated from each other. As in the third embodiment, the first lower flap 20a includes the first lower convex portion 201a and the first lower concave portion 202a, and the first upper flap 30a includes the first upper convex portion 301a and the first upper concave portion 302a. Including.

  The second lower flap 20b includes a plurality of second lower projections 201b formed on the tip end thereof and a plurality of second lower recesses 202b formed on the tip end. The second lower convex portion 201 b and the second lower concave portion 202 b are alternately and continuously arranged. The second upper flap 30b includes a plurality of second upper projections 301b formed at the tip end edge thereof and a plurality of second upper recesses 302b formed at the tip end edge. The second upper convex portion 301 b and the second upper concave portion 302 b are alternately and continuously arranged.

  The second lower convex portion 201b, the second lower concave portion 202a, the second upper convex portion 301a, and the second upper concave portion 302a are the second lower convex when the second lower flap 20b and the second upper flap 30b face each other. The portion 201 b and the second upper concave portion 302 b are disposed to face each other, and the second lower concave portion 202 b and the second upper convex portion 301 b are disposed to face each other. That is, the second lower convex portion 201 b and the second upper concave portion 302 b are provided so as to engage with each other when the second lower flap 20 b and the second upper flap 30 b are bent toward each other. The second lower concave portion 202b and the second upper convex portion 301b are provided so as to engage with each other when the second lower flap 20b and the second upper flap 30b are bent toward each other.

  Similar to the third embodiment, the third lower flap 20c includes the third lower convex portion 201c and the third lower concave portion 202c, and the third upper flap 30c includes the third upper convex portion 301c and the third upper concave portion 302c. Including. The fourth lower flap 20d includes a fourth lower convex portion 201d and a fourth lower concave portion 202d, and the fourth upper flap 30d includes a fourth upper convex portion 301d and a fourth upper concave portion 302d.

  In the packaging method of this embodiment, the article P is placed on the bottom lid 2. Next, as in the second embodiment, the canopy 3 is placed on the article P so that the lower flaps 20a to 20d face the upper flaps 30a to 30d respectively, and the article P has the bottom cover 2 and the canopy 3 Placed in between. At this time, the first to fourth lower convex portions 201a to 201d respectively face the first to fourth upper concave portions 302a to 302d, and the first to fourth upper convex portions 301a to 301d are first to fourth lower portions. It opposes recessed part 202a-202d, respectively. After the packaging box 1 is wrapped by the film 4, the film 4 is shrunk.

  The contraction of the film 4 is used to engage the lower convex portions 201a, 201c and 201d with the upper concave portions 302a, 302c and 302d, and the upper convex portions 301a, 301c and 301d to the lower concave portions 202a, 202c and 202d. The respective engagements are the same as in the third embodiment. Furthermore, in this embodiment, the second lower flap 20b and the second upper flap 30b are bent by the contraction of the film 4, and the second lower convex portion 201b is received by the second upper concave portion 302b, and the second upper concave portion 302b is While being engaged, the second upper convex portion 301b is received by the second lower concave portion 202b and engaged with the second lower concave portion 202b.

  As a result, as shown in FIG. 15, the packaging box 1 is closed and the article P is packaged by the packaging box 1 and the film 4.

Fifth Embodiment
FIG. 16 shows a development view of the packaging box 1 of the fifth embodiment. In this embodiment, the flaps 20a, 20b, 30a, 30b each have a corrugated leading edge. Each of the convex portions 201a, 201b, 301a, and 301b has a rounded end. The concave portions 202a, 202b, 302a, and 302b respectively have shapes that engage with (engage with) the above-described convex portions. On the other hand, the flaps 20c, 20d, 30c, and 30d respectively have straight end edges 200c, 200d, 300c, and 300d instead of the waveform leading end edge.

  In the packing method of this embodiment, the articles P are placed on the bottom lid 2 as in the fourth embodiment. Then, the canopy 3 is put on the article P so that the lower flaps 20 a-20 d face the upper flaps 30 a-30 d respectively, and the article P is disposed between the bottom lid 2 and the canopy 3. At this time, the lower convex portions 201a and 201b face the upper concave portions 302a and 302b, respectively, and the upper convex portions 301a and 301b face the lower concave portions 202a and 202b, respectively. Then, after the packaging box 1 is wrapped by the film 4, the film 4 is shrunk.

  Similar to the fourth embodiment, the contraction of the film 4 is used to engage the lower convex portions 201a and 201b with the upper concave portions 302a and 302b, and the upper convex portions 301a and 301b respectively to the lower concave portions 202a and 202b. Engage. Further, similarly to the first embodiment, the contraction of the film 4 is used to bring the leading edge 200c and the leading edge 300c into line contact with each other, and bring the leading edge 200d and the tip edge 300d into line contact with each other.

  As a result, the packaging box 1 is closed and the article P is packaged by the packaging box 1 and the film 4.

  As mentioned above, although the preferable embodiment of this invention was described, this invention is not limited to the said structure. The bottom cover 2 and the canopy 3 are not limited to the rectangular shape, and may have a polygonal shape such as a pentagon or a hexagon. A lower flap may be provided at each bottom edge of the polygonal bottom lid 2 and an upper flap may be provided at each upper edge of the polygonal canopy 3. The bottom cover 2 and the canopy 3 may have other shapes than the polygonal shape.

  The numbers of the convex portions and the concave portions are appropriately determined according to the size of the packaging box 1 and the like, and are not limited to the examples of the embodiment. One protrusion and one recess may only be provided for each of the pair of upper and lower flaps.

  In the above embodiment, the third and fourth flaps 20c, 20d, 30c, 30d may be omitted. For example, if the article P is a book, only the first lower flap 20a and the first upper flap 30a can prevent a third party from acquiring the title written on the back of the book.

  In the above embodiment, a shrink film is used as the film 4 and the film 4 is shrunk by heat. Instead of this, as the film 4, a film (cold shrink film) having self-shrinkability that spontaneously shrinks when tensioned and stretched may be used. Such films are disclosed, for example, in JP-A No. 2018-177375.

  The packing box 1 may be made of plastic instead of paper such as cardboard. The article P may be something other than a book, a CD, or a DVD. A plurality of articles P may be packaged in one packaging box 1. The article P is not limited to a rectangular shape. An article P having another shape may be packaged by the above packaging method.

DESCRIPTION OF SYMBOLS 1 packing box 10 connection edge 2 bottom lid 20a-20d lower flap 21a-20d lower edge 200a-200d linear tip edge 201a-201d lower convex part 202a-202d lower concave part 3 canopy 30a-30d upper flap 31a-30d upper edge 300a-300d Straight tip edge 301a-301d Upper convex part 302a-302d Upper concave part 4 Film

Claims (16)

A packing method for packing an article using a packing box and a shrinkable film, comprising:
The packing box is
Bottom lid,
A first lower flap provided continuously to the first bottom edge of the bottom lid and foldable with respect to the bottom lid;
With the canopy,
And a first upper flap that is provided continuously to the first ceiling edge of the canopy and is foldable with respect to the canopy.
The packing method is
Placing the article between the bottom lid and the canopy;
Wrapping the packaging box with the film;
Shrink the film,
Sandwiching the article between the bottom lid and the canopy by shrinkage of the film;
The first lower flap and the first upper flap are folded by contraction of the film to bring the first lower flap and the first upper flap into contact with each other.
Packing method characterized by. The first lower flap includes a straight edge.
The first upper flap includes a straight edge.
The packing method is
The first lower flap and the first upper flap are folded by contraction of the film to bring the leading edge of the first lower flap and the leading edge of the first upper flap into line contact with each other.
A packing method according to claim 1, characterized in that. The first lower flap is
At least one lower convex portion formed on the tip edge thereof;
And at least one lower recess formed in the tip edge thereof;
The first upper flap is
At least one upper convex portion formed on the tip edge thereof;
And at least one upper recess formed in the tip edge thereof;
The packing method is
The first lower flap and the first upper flap are folded by contraction of the film to engage the at least one lower protrusion with the at least one upper recess, and the at least one upper protrusion is at least the at least one upper protrusion. Engage one lower recess,
A packing method according to claim 1, characterized in that. The plurality of lower projections and the plurality of lower recesses are continuously and alternately arranged,
The plurality of upper convex portions and the plurality of upper concave portions are alternately and continuously arranged.
A packing method according to claim 3, characterized in that. The packing box is further
A second lower flap provided continuously to a second bottom edge opposite to the first bottom edge of the bottom lid and foldable with respect to the bottom lid;
And a second upper flap provided continuously to a second upper edge opposite to the first upper edge of the upper edge and foldable with respect to the canopy.
A packing method according to any one of claims 1 to 4, characterized in that. The packing method is
The second lower flap and the second upper flap are folded by the contraction of the film to bring the second lower flap and the second upper flap into contact with each other.
A packing method according to claim 5, characterized in that. The second lower flaps and the second upper flaps are provided continuously in a foldable manner with respect to each other.
A packing method according to claim 5, characterized in that. A shrink film is used as the film, and the film is shrunk by heat,
A packing method according to any one of claims 1 to 7, characterized in that. A packaging box for use with a shrinkable film to pack an article, comprising:
The packing box is
Bottom lid,
A first lower flap provided continuously to the first bottom edge of the bottom lid and foldable with respect to the bottom lid;
With the canopy,
And a first upper flap that is provided continuously to the first ceiling edge of the canopy and is foldable with respect to the canopy.
The first lower flap is
At least one first lower convex portion formed on the tip edge thereof;
And at least one first lower recess formed in the tip edge thereof;
The first upper flap is
At least one first upper convex portion formed on the tip edge thereof;
And at least one first upper recess formed in the tip edge thereof;
The at least one first lower projection and the at least one first upper recess are provided to engage with each other when the first lower flap and the first upper flap are bent toward each other,
The at least one first lower recess and the at least one first upper protrusion are provided to engage with each other when the first lower flap and the first upper flap are bent toward each other ,
Packing box characterized by. The plurality of first lower convex portions and the plurality of first lower concave portions are alternately and continuously arranged.
The plurality of first upper convex portions and the plurality of first upper concave portions are continuously and alternately arranged.
The packaging box according to claim 9, characterized in that. The at least one first lower protrusion and the at least one first upper protrusion each have a pointed or rounded tip,
The packaging box according to claim 9, characterized in that. The packing box is further
A second lower flap provided continuously to a second bottom edge opposite to the first bottom edge of the bottom lid and foldable with respect to the bottom lid;
And a second upper flap provided continuously to a second ceiling edge opposite to the first ceiling edge of the canopy and foldable with respect to the canopy.
The packaging box according to claim 9, characterized in that. The second lower flaps and the second upper flaps are provided continuously in a foldable manner with respect to each other.
A packaging box according to claim 12, characterized in that. The second lower flap is
At least one second lower convex portion formed on the tip edge thereof;
And at least one second lower recess formed in the tip edge thereof;
The second upper flap is
At least one second upper convex portion formed on the tip edge thereof;
And at least one second upper recess formed in the tip edge thereof;
The at least one second lower projection and the at least one second upper recess are provided to engage with each other when the second lower flap and the second upper flap are bent toward each other,
The at least one second lower recess and the at least one second upper protrusion are provided to engage with each other when the second lower flap and the second upper flap are bent toward each other ,
A packaging box according to claim 12, characterized in that. The plurality of second lower convex portions and the plurality of second lower concave portions are alternately and continuously arranged.
A plurality of the second upper projections and a plurality of the second upper recesses are continuously and alternately arranged;
The packaging box according to claim 14, characterized in that. The canopy and the bottom cover are respectively in a rectangular shape and have the same shape as each other.
The packaging box according to any one of claims 9 to 15, characterized in that.

Images