JP5878609B1 - Packing box - Google Patents

Abstract

To provide a packaging box that can be formed only by bending a blank and has excellent air permeability and can easily store and unpack articles. SOLUTION: Bottom plate portion 10, front plate portion 20, rear plate portion 30, right side plate portion 50, left side plate portion 60, right front flap 51, right rear flap 52, left front flap 61, left rear flap 62, front plate. A first top plate portion 41 connected to the bottom plate portion via the portion, a second top plate portion 42 connected to the bottom plate portion via the rear plate portion, a front flap connecting means for connecting the right front and left front flaps, Rear flap connecting means for connecting the left rear flap, front plate portion, right side plate portion, front side portion connecting means for connecting the left side plate portion, rear side plate portion, right side plate portion, and rear side portion connecting means for connecting the left side plate portion. A blank 2A having vent holes provided in all or any of the top plate connecting means for connecting the first top plate and the second top plate, the right side plate, the left side plate, the front plate, and the rear plate. A packaging box formed by bending. [Selection] Figure 1

Description

  The present invention relates to a packaging box that can be easily formed by simply bending a blank, can be easily unpacked, and can be used for storing articles as a box even after unpacking.

  The packaging box for delivering or storing various articles has crease lines on each of the four side surfaces (two end surfaces and two side surfaces), the top plate portion (top surface portion), and the bottom plate portion (bottom surface portion). Are generally formed by folding according to Such a packaging box is formed by gluing at least a part of four side surfaces and sticking the flaps constituting the bottom plate portion and the top plate portion with a tape or binding them with a stapler.

  For example, in the packaging box disclosed in Patent Documents 1 and 2, a part of the side surface is glued, and two flaps forming the bottom (upper lid) of the packaging box must be attached with tape. Further, in closing after the article is accommodated, gluing or tape sticking work (or staple binding) is required. Further, when unpacking, an operation of peeling the tape using a knife or the like and an operation of releasing the staple binding portion using a tool are required. Therefore, complicated operations such as material costs other than blanks and tape sticking occur when assembling, storing articles, and unpacking.

  In addition, these packing boxes are composed of one end plate and two side surfaces of the box (for example, the side surface is composed of one cardboard), and the top plate and the bottom plate are double-opened. There is room for improvement in strength when stacking packing boxes. Therefore, if the cardboard is thickened to increase the strength, it becomes difficult to bend the blank, the material cost increases, and the weight of the packaging box also increases.

  In many cases, the packing box is reused as a box for storing articles and the like that have been stored after unpacking. In such a case, the upper lid can be easily closed to prevent other articles from being mixed in (however, tape sticking or the like is unnecessary), or strength is required for stacking boxes. However, since the packaging box disclosed in Patent Documents 1 and 2 has the upper lid double-opened, it may be half-opened, and other articles may be mixed in, and the upper lid portion may be recessed when stacked.

  On the other hand, the packaging box disclosed in Patent Document 3 can be easily formed by simply bending a blank, and can be easily unpacked by hand without using a tool, and can be reused as a packaging box. You can also Moreover, this packaging box is lightweight and excellent because the two side surfaces having a large area among the four side surfaces of the box have a double structure, and the top plate portion and the bottom plate portion are composed of one sheet. Have high strength.

  In addition, this packing box has two top plate parts (a front top plate part and a rear top plate part), and after closing the box with the rear top plate part, a closing claw for the front top plate part is formed in a closing slit of the rear top plate part. The packaging box can be easily closed by inserting. At this time, the closing claw of the front top plate portion is inserted along the rear top plate portion, so that it does not interfere with the stored items and can be stored up to the vicinity of the top plate portion (accommodating efficiency of the packaging box can be improved).

  However, in this packaging box, the left and right flaps positioned in the front table are connected to the left and right side plate parts but not to the bottom plate part (FIGS. 7 and 8, etc. of Patent Document 3). In order to prevent these left and right flaps from opening unintentionally, tape must be applied.

  The packaging boxes of Patent Documents 1 to 3 are all highly concealed, but there are also containers (for example, leafy vegetables) that require air permeability, and stacking is required for labor saving of loading work. It may be required to be easy. That is, a packaging box that is excellent in air permeability or easy to stack may be required.

JP 2000-153824 A JP 2004-168354 A Japanese Patent No. 5420089

  Therefore, the present invention can easily form a packaging box with excellent strength simply by bending the blank, can easily unpack the packaging box without the need for tools, and without using tape or the like even after unpacking. The shape of the bottomed box can be maintained, the lid can be easily closed, it has sufficient strength and can be reused for storing articles, etc., and preferably has excellent breathability or stacks easily The realization of a packaging box that can be used was an issue.

Packing box blank according to the present invention for solving the above problems, the bottom plate portion of the rectangular shape, the plate portion before continuously connected to the front of the bottom plate portion, the plate portion was connected to the rear of the bottom plate, the right side of the bottom plate portion And a left side plate portion connected to the left side of the bottom plate portion. The blank is formed of, for example, corrugated cardboard or the like, and the packaging box can be easily formed by bending the front plate portion, the rear plate portion, the right plate portion, and the left plate portion in the same direction with respect to the bottom plate portion.

  The blank has a right front flap connected to the front of the right plate and a left front flap connected to the front of the left plate when the right and left plates are folded in the same direction with respect to the bottom plate. It has a front flap connecting means for connecting. Similarly, the blank has rear flap connecting means for connecting the right rear flap and the left rear flap.

  In this way, a bottomed box having an open top plate can be formed simply by bending and connecting the right side plate portion, left side plate portion, right front flap, left front flap, right rear flap and left rear flap of the blank. The inside of the bottomed box formed in this way can easily accommodate the article without the opening being blocked by the flap that forms the top plate when the article is accommodated therein. Moreover, since the said bottomed box is comprised by the bottom plate part by one piece, it has sufficient intensity | strength for supporting a stored item.

  In addition, the blank includes right and left front side connecting means for connecting the front plate part to the right side plate part and the left side plate part when the front plate part is bent in the same direction as the right side plate part etc., and the rear plate part to the right side plate. Left and right rear side connecting means for connecting the rear plate portion to the right side plate portion and the left side plate portion when bent in the same direction as the portion or the like.

  Therefore, after the articles are stored in the bottomed box, the front side and the rear side of the bottomed box are simply folded by bending the front plate and the rear plate of the blank and connecting them to the right side plate and the left side plate. It is possible to make the part excellent in the strength of the double structure (that can withstand stacking).

  When the front plate portion and the rear plate portion of the blank are connected to the right plate portion and the left plate portion, the first top plate portion is positioned above the front plate portion, and the second top plate portion is positioned above the rear plate portion. It is done. Then, after bending the second top plate portion having substantially the same shape as the bottom plate portion and the second top plate front side flap connected to the second top plate portion, the second top plate front side flap is moved to the front plate portion, right The bottomed box can be closed by positioning it in contact with the inside of the front flap and the left front flap (inside the bottomed box). Further, the first top plate portion is folded and the top plate portion is doubled by simply connecting the first top plate portion and the second top plate portion from the top of the second top plate portion (from the front side) with the top plate portion connecting means. It can be closed (the packaging box is closed).

  Here, the second top plate portion having substantially the same shape as the bottom plate portion serves as a cover portion having a single bottomed box body, and the second top plate front side flap is in contact with the inner sides of the left and right front flaps. Increase the function and strength of the cover as a lid.

  In the packaging box thus formed, the blank is formed between the vicinity of the boundary line between the bottom plate portion and the front plate portion and the right side portion of the front plate portion (formed on the front plate portion). And a second tear line (formed on the front plate portion) formed between the line, the vicinity of the boundary line between the bottom plate portion and the front plate portion, and the left side portion of the front plate portion.

  When unpacking the packaging box, first by manually tearing the first and second tear lines, the front plate portion is connected to the first top plate portion and the bottom plate portion is connected to the portion. To separate. Next, unpacking is completed by opening the 2nd top plate part which has closed the bottomed box by hand.

  Here, the tear end point of the first tear line is connected to a portion closer to the front of the first top plate than the right front side connecting means, and the tear end point of the second tear line is the left front side connecting means. It is connected to a portion closer to the front of the first top plate than. Therefore, the front plate portion connected to the bottom plate portion is connected to the left and right side plate portions by the left and right front side portion connecting means and restricts the left and right front flaps from the outside. The shape of the bottom box can be maintained.

  Moreover, even after unpacking, the packaging box has a double structure of left and right front flaps connected on the front plate part side, a rear plate part side has a triple structure of left and right rear flaps and a rear plate part, and the bottom plate part is Since the front plate portion, the rear plate portion, the right side plate portion, and the left side plate portion are connected to each other, the strength is excellent.

Following relationships there Ru between the shapes of the bottom plate portion of the second top panel section. That is, the distance between the boundary between the bottom plate portion and the front plate portion, which is the front side of the bottom plate portion, and the boundary between the bottom plate portion and the rear plate portion, which is the rear side of the bottom plate portion, is the second ceiling that is the front side of the second top plate portion. It is slightly longer than the distance between the boundary between the plate portion and the second top plate front side flap and the boundary between the second top plate portion and the rear plate portion as the rear side of the second top plate portion. Accordingly, when the packaging box is formed by bending the blank, the second top plate front flap is positioned so as to be substantially in contact with the inside of the connected left and right front flaps.

Be provided with a hole worked opened the second top plate portion not good. Then, the lid of the bottomed box can be easily opened and closed when the box is formed and after unpacking by inserting a finger into the opening handle hole.

Also between the start point and the start point of the second tear line of the first tear line, but it may also be provided to further tearing starting portion. Then, the front plate can be easily separated into a portion connected to the bottom plate and a portion connected to the first top plate by inserting a finger into the tear starting point.

Front flap connecting means included in the blank, the right front flap and one front engagement formed on the left front flap Tomeshitahen, and that it has a front locking hole formed in the other, the front locking tongues They can be slightly bent toward the front locking hole and engaged with each other. The same applies to the rear flap connecting means.

  The right front side connecting means of the blank includes a right front side locking tongue formed on one of the front plate and the right side plate, and a right front side locking hole formed on the other. By having the right front side portion locking tongue piece slightly bent toward the right front side portion locking hole, both can be engaged. The same applies to the left front side connecting means. Of course, the same applies to the right and left rear side connecting means.

  Here, since the front locking tongue piece, the rear locking tongue piece, the left and right front side portion locking tongue pieces, and the left and right rear side portion locking tongue pieces are all bent slightly toward the locking hole, the packaging box There is no interference with the contents inside (the box), and no dead space is generated inside the packaging box.

  The blank top plate connecting means has a bottom plate by having a top plate locking claw formed on one of the first top plate portion and the second top plate portion and a top plate locking slit formed on the other side. Covering the surface of the second top plate portion with the box closed with the first top plate portion, the top plate locking claw of the first top plate portion into the top plate locking slit of the second top plate portion Can be inserted. If the first top plate portion and the second top plate portion are connected in this manner, the top plate locking claw and the second top plate portion of the first top plate portion can be positioned substantially in parallel through before and after the connection. The top plate latching claw also does not interfere with the contents inside the packing box (inside the box), and no dead space is generated inside the packing box.

Right front side locking tongue having left right front side connecting means (left front side locking tongue) or right front side locking hole (left front side locking hole), the front plate You may provide in the site | part (for example, intermediate | middle between a 1st top plate part and a bottom plate part) between a 1st top plate part and a bottom plate part. If the left and right front side connecting means is formed as described above, as will be described in the embodiment for carrying out the invention, the connecting work of the top board connecting means (or the top board locking of the second top board part) The operation of inserting the top plate locking claw of the second top plate portion into the slit is further facilitated, and the interference between the top plate locking claw and the contents is further reduced.

Right side plates, the left side plate portion, all of the front plate portion and Koita unit, or by providing at least one ventilation hole, it is possible to realize a ventilation of the packaging box.

When the front plate portion and the rear plate portion have vent holes, the right front flap, the right rear flap, the left front flap, and the left rear flap also have the flap vent holes. In order to obtain good air permeability, it is preferable that the vent holes of the right front flap and the left front flap communicate (overlap) with the vent holes of the front plate portion as wide as possible, and the right rear flap and the left rear flap The positional relationship between the vent hole and the vent hole in the rear plate is the same.

Blank may have a left inner flap which connects the bottom plate portion via a right inner flaps, and the left plate portion for connecting the bottom plate portion through the right side plate. Prior to closing the packaging box by the first top plate and the second top plate, if the left and right inner flaps are bent toward the opening side, the left and right side plates and the second top plate are closed when the packaging box is closed. Can be closed with left and right inner flaps. The right and left inner flaps thus bent increase the strength of the left and right side plates on the opening side, and ensure the strength against stacking, for example.

The blank of the packaging box includes a bottom plate side stacking portion provided on both or one of the bottom plate portion front side and the bottom plate portion rear side, and a first top plate portion which is a boundary region between the first top plate portion and the front plate portion. You may have the top side stacking part provided in both or one of the front side and the 2nd top plate part rear side.

  Here, the bottom plate side stacking portion and the top plate side stacking portion provided on the front plate portion side are disposed symmetrically across the front plate portion, and are similarly disposed on the rear plate portion side. Therefore, when the two packing boxes are to be stacked, the bottom plate side stacking portion of the upper packing box is engaged with the top plate stacking portion of the lower packing box, so that the lower packing box is engaged. The front side of the first top plate portion of the box and the front side of the bottom plate portion of the upper packaging box can be overlapped, and the rear side of the second top plate portion of the lower packaging box and the bottom plate of the upper packaging box The rear side of the club can be overlapped. In this way, the packaging box can be easily stacked without causing any deviation.

The bottom plate side stacking portion may be a claw portion (stacking claw portion), and the top plate side stacking portion may be a slit portion (stacking slit portion). In this case, when stacking a plurality of the packaging boxes, the stacking claw of the upper packaging box is inserted into the stacking slit of the lower packaging box, and the bottom plate side stacking portion and the top plate side stacking portion are What is necessary is just to engage. The bottom plate side stacking portion configured as described above can discharge the dropped water to the outside when the water adhered to the contents is dropped.

  The packaging box according to the present invention having the above configuration can easily form a packaging box with excellent strength simply by bending the blank, and can easily open the packaging box without the need for tools, and has excellent air permeability. It is also possible to realize the ease of stacking.

  In addition, the packaging box according to the present invention having the above configuration can maintain the shape of the bottomed box without using a tape or the like even after unpacking, can easily close the lid, and has sufficient strength. It can be reused for storage of goods.

FIG. 1 is a diagram showing a schematic plan configuration of a blank for forming an embodiment of a packaging box according to the present invention, and shows a surface which is an inner surface side of the packaging box. It is the figure which showed the plane schematic structure of the front flap connection means which the blank shown in FIG. 1 has, and the right-and-left front side connection means. It is the figure which showed the plane schematic structure of the back flap connection means and the right-and-left back side connection means which the blank shown in FIG. 1 has. It is the figure which showed the plane schematic structure of the top-plate part connection means which the blank shown in FIG. 1 has, FIG. 4 (a) shows the top-plate locking claw which a top-plate part connection means has, FIG.4 (b) The top plate latching slit which a top plate part connection means has is shown. It is the figure which showed the plane schematic structure of the ventilation hole which the blank shown in FIG. 1 has, a baseplate side stacking part, and a top-plate side stacking part. It is the figure which showed the plane schematic structure of the unpacking tear part which the blank shown in FIG. 1 has. It is a figure for demonstrating bending of the right front flap of a blank shown in FIG. 1, a right back flap, a right side board part, etc. FIG. It is a figure for demonstrating latching etc. of the left front flap and right front flap of the blank shown in FIG. It is a figure for demonstrating the bottomed box formed by bending the blank shown in FIG. It is a figure for demonstrating closing of the bottomed box formed by bending the blank shown in FIG. It is a figure for demonstrating unpacking of the packaging box formed by bending the blank shown in FIG. It is a figure for demonstrating reuse of the unpacked packaging box shown in FIG. It is a figure for demonstrating the stacking | stacking of the packaging box formed by bending the blank shown in FIG. It is a figure for demonstrating the state etc. which piled up the packaging box formed by bending the blank shown in FIG. It is a figure for demonstrating the state etc. which put the packing box formed by bending the blank shown in FIG. 1 side by side. It is a figure for demonstrating the state etc. which arranged the packing box formed by bending the blank shown in FIG. 1 vertically.

  Hereinafter, a packaging box according to the present invention will be described with reference to the drawings.

<Planar configuration of blank>
A packaging box 1A according to an embodiment of the present invention will be described together with a blank 2A for forming the packaging box 1A. A blank 2A having a schematic plan configuration shown in FIG. 1 has a bottom plate portion 10, a front plate portion 20, a rear plate portion 30, a first top plate portion 41, a second top plate portion 42, and a right side plate portion, all having a rectangular shape. 50 and a left side plate portion 60, which are cut from a standard cardboard or the like. Here, the boundary (fold line) between the bottom plate portion 10 and the front plate portion 20 forms the bottom plate portion front side 10a (for example, the length is 394 mm), and the boundary (fold line) between the bottom plate portion 10 and the rear plate portion 30 is the bottom plate. The rear side 10b is formed, the boundary (crease line) between the bottom plate 10 and the right side plate 50 is the bottom right side 10c (for example, the length is 257 mm), and the boundary between the bottom plate 10 and the left side plate 60 ( The crease line) forms the left side 10d of the bottom plate portion.

  The length of the first top plate portion 41 connected to the bottom plate portion 10 via the front plate portion 20 is about one half (for example, 127 mm) of the length of the right side 10c of the bottom plate portion, and via the rear plate portion 30. The length of the second top plate portion 42 connected to the bottom plate portion 10 is slightly shorter than the length of the bottom plate portion right side 10c (for example, 254 mm). Accordingly, the second top plate portion 42 has substantially the same shape as the bottom plate portion 10, but is slightly smaller than the bottom plate portion 10. Further, the second top plate portion 42 has a second top plate front side flap 43 connected to the side facing the rear plate portion 30.

<Left and right side flaps>
The right side plate part 50 further includes a right front flap 51 connected to the front side, a right rear flap 52 connected to the rear side, and a right inner side flap 53 connected to the right side (the right inner side flap 53 passes through the right side plate part 50). Connected to the bottom plate portion 10). Similarly, the left side plate portion 60 also includes a left front flap 61 connected to the front, a left rear flap 62 connected to the rear, and a left inner flap 63 connected to the left side. The right front flap 51, the right rear flap 52, the right inner flap 53, the left front flap 61, the left rear flap 62, and the left inner flap 63 all have a substantially rectangular shape.

  Here, the boundary (fold line) between the right side plate part 50 and the right front flap 51 forms a right front vertical side 50a (for example, a length of 198.5 mm), and the boundary (fold line) between the right side plate part 50 and the right rear flap 52. Line) forms the right rear vertical side 50b, and the boundary (fold line) between the left side plate portion 60 and the left front flap 61 forms the left front vertical side 60a, and the boundary between the left side plate portion 60 and the left rear flap 62 (fold line). Line) forms the left rear vertical side 60b. Further, the boundary (fold line) between the right side plate portion 50 and the right inner side flap 53 forms a right side plate portion upper side 50c, and the boundary (fold line) between the left side plate portion 60 and the left inner side flap 63 forms a left side plate portion upper side 60c. ing.

  The right front flap 51 includes a front end side 51a facing the right front vertical side 50a, a right front upper side 51b serving as a side facing the front plate 20 and a right front bottom serving as a side facing the front plate 20 51c. Similarly, the right rear flap 52 has a front end side 52a, a right rear upper side 52b and a right rear bottom 52c, which are sides opposite to the rear plate part 30. The left front flap 61 has a front end side 61a, a left front upper side 61b and a left front bottom 61c which are sides opposite to the front plate portion 20, and a left rear flap 62 has a front end side 62a and a rear side. It has a left rear upper side 62b and a left rear bottom 62c which are sides opposite to the plate part 30.

  The lengths of the right front flap 51 and the left front flap 61 are, for example, about two thirds of the length of the bottom plate front side 10a (for example, 260 to 270 mm), and the lengths of the right rear flap 52 and the left rear flap 62 are also It is the same. The lengths of the right inner flap 53 and the left inner flap 63 are, for example, about one fifth of the length of the bottom plate front side 10a (for example, 80 mm).

<Each top plate>
The boundary (fold line) between the first top plate portion 41 and the front plate portion 20 forms the first top plate portion front side 41a, and the boundary (fold line) between the second top plate portion 42 and the rear plate portion 30 is A second top plate portion rear side 42a is formed. A side portion of the first top plate portion 41 that faces the first top plate portion front side 41a is a first top plate portion end side 41b. The side of the second top plate portion 42 that faces the second top plate portion rear side 42a is the second top plate portion front side 42b, and the second top plate portion front side 42b is the second top plate portion 42. And a boundary (crease line) between the second top plate front side flap 43.

  An opening handle hole 44 is formed on the second top plate portion 42 side from the center of the second top plate front side 42b. The opening handle hole 44 has a substantially rectangular shape into which two or three fingers can be inserted, and both end sides of the edge facing the second top plate front side 42b are rounded.

  In this specification, when the blank 2A is folded to form the packaging box 1A, the direction parallel to the bottom plate portion front side 10a is defined as the width direction, the direction parallel to the bottom plate portion right side 10c is defined as the vertical direction, and the right front portion vertical A direction parallel to the side 50a is defined as a height direction. The blank 2A can be formed of a material such as cardboard or cardboard, but is not limited to these materials.

<Front flap connecting means>
As shown in FIG. 2, the front flap connecting means that connects the right front flap 51 and the left front flap 61 is a substantially trapezoidal front locking hole 511 that the right front flap 51 has and a substantially base that the left front flap 61 has. It is composed of a front locking tongue piece 611 having a shape.

  The front locking hole 511 is formed symmetrically on the longitudinal center line of the right front flap 51. In the front locking hole 511, the bottom edge portion 511a located on the right side plate portion 50 side is slightly longer than the upper edge portion 511b located on the tip end side 51a side of the right front flap 51, and both end sides of the bottom edge portion 511a. Is rounded.

  The front engaging tongue piece 611 is formed symmetrically on the longitudinal center line of the left front flap 61, and is connected to the left front flap 61 only by the connection side portion 611b located on the right side plate portion 60 side (connection side). The part 611b is also a crease line.) In the front locking tongue piece 611, the connecting side 611b is slightly shorter than the locking front end side 611a located on the front end side 61a side of the left front flap 61 (both ends of the locking front end side 611a are rounded). ing.).

  The outline defining the substantially trapezoidal shape of the front locking tongue 611 is substantially the same as the shape of the front locking hole 511, and the connecting side 611 b of the front locking tongue 611 is connected to the upper side edge 511 b of the front locking hole 511. Although the length is substantially the same, the vicinity of the locking front end side 611 a of the front locking tongue 611 is slightly wider than the bottom edge 511 a of the front locking hole 511.

  Here, the distance between the center of the front locking hole 511 and the right front vertical side 50a is approximately one half of the length of the bottom plate front side 10a, and the center of the front locking tongue 611 and the left front vertical side 60a Is also approximately one-half of the length of the bottom plate front side 10a.

  The front flap connecting means is not limited to the above configuration as long as the right front flap 51 and the left front flap 61 can be connected. For example, the right front flap 51 may have a front locking tongue piece instead of the front locking hole 511, and the left front flap 61 may have a front locking hole instead of the front locking tongue piece 611.

<Rear flap connecting means>
As shown in FIG. 3, the rear flap connecting means for connecting the right rear flap 52 and the left rear flap 62 is a substantially trapezoidal rear locking hole 521 that the right rear flap 52 has and a substantially base that the left rear flap 62 has. It is composed of a rear locking tongue piece 621 having a shape. Here, the rear locking hole 521 is formed in the same manner as the front locking hole 511, and the rear locking tongue piece 621 is formed in the same manner as the front locking tongue piece 611. Note that the rear flap connecting means is not limited to the above configuration, as is the case with the front flap connecting means.

<Left and right front side connecting means>
As shown in FIG. 2, the right front side connecting means is a substantially trapezoidal right front side locking tongue piece 201 connected to the front plate part 20 and a right trapezoidal right front side formed on the right side plate part 50. It consists of a part locking hole 501. The right front side portion locking tongue piece 201 is included in the right front flap 51 before cutting the blank 2A from a regular cardboard or the like, but after cutting, the right front side 20c of the front plate portion 20 of the front plate portion 20 is cut. In the center part, it forms so that it may connect with the front board part 20 by the connection edge part 201b.

  In the right front side locking tongue piece 201, the locking tip end side 201a opposite to the connection side 201b is slightly wider than the connection side 201b. The upper edge 501b of the right front side locking hole 501 is positioned at the center of the right front vertical side 50a of the right side plate 50, and the bottom edge 501a is opposed to the upper edge 501b. The vicinity of the bottom edge 501a of the right front side locking hole 501 is slightly wider than the upper edge 501b, and both ends of the bottom edge 501a are rounded.

  The outline defining the substantially trapezoidal shape of the right front side portion locking tongue piece 201 is substantially the same as the shape of the right front side portion locking hole 501, but as with the front locking tongue portion 611 and the front locking hole 511, The front end portion side edge 201a of the front side portion engaging tongue piece 201 is slightly wider than the bottom edge portion 501a of the right front side portion engaging hole 501.

  Similarly to the right front side part connecting means, the left front side part connecting means is a left front side part locking tongue piece 202 connected to the front plate part 20 and a left front side part locking hole 602 formed in the left side plate part 60. (Fig. 2). The left front side portion locking tongue piece 202 is configured in the same manner as the right front side portion locking tongue piece 201 (connected to the central portion of the left side 20d of the front plate portion of the front plate portion 20). The stop hole 602 is configured in the same manner as the right front side portion locking hole 501.

  The left and right front side connecting means is not limited to the above configuration as long as the front plate portion 20 and the right plate portion 50 can be connected. For example, the right side plate portion 50 (left side plate portion 60) is replaced with a right front side portion locking hole 501 (left front side portion locking hole 602), and a right front side portion locking tongue piece (left front side portion locking tongue piece). The front plate 20 has a right front side locking hole (left front side locking hole) instead of the right front side locking tongue 201 (left front side locking tongue 202). It may be.

<Rear side connecting means>
As shown in FIG. 3, the right rear side portion connecting means includes a right rear side portion locking tongue piece 303 connected to the rear plate portion 30 and a right rear side portion locking hole 503 formed in the right side plate portion 50. Is done. The right rear side portion locking tongue piece 303 is configured in the same manner as the right front side portion locking tongue piece 201 in the rear plate portion 30, and the right rear side portion locking hole 503 is formed on the right rear portion vertical side of the right side plate portion 50. In the vicinity of 50b, it is configured in the same manner as the right front side portion locking hole 501.

  Similarly to the right rear side portion connecting means, the left rear side portion connecting means is also provided with the left rear side portion locking tongue piece 304 connected to the rear plate portion 30 and the left rear side portion locking hole 604 formed in the left side plate portion 60. (Fig. 3). The left rear side portion locking tongue 304 is configured similarly to the right rear side portion locking tongue piece 303, and the left rear side portion locking hole 604 is configured similarly to the right rear side portion locking hole 503. Note that the left and right rear side connecting means is not limited to the above configuration, as is the case with the left and right front side connecting means.

<Top plate connection means>
The top plate connecting means in the blank 2A is composed of a top plate locking claw 411 and a top plate locking slit 421 for connecting the first top plate portion 41 and the second top plate portion 42 (connected first plates). The top plate portion 41 and the second top plate portion 42 form the top plate portion 40.) As shown in FIG. 4A, the top plate locking claw 411 extends from the central portion of the first top plate portion end side 41 b of the first top plate portion 41. As shown in FIG. 4B, the top plate locking slit 421 is disposed between the second top plate portion rear side 42a and the second top plate portion front side 42b in the second top plate portion 42. ing.

  The distance between the top plate locking claw 411 and the first top plate portion front side 41a of the first top plate portion 41 is approximately one half of the length of the bottom plate right side 10c, and the top plate locking slit 421 and The distance between the second top plate portion 42 and the second top plate portion rear side 42a is also approximately one half of the length of the bottom plate right side 10c.

  The top plate latching claw 411 has a connection part 411j, a claw body part 411t, a maximum width part 411a, a toe part 411b, and a cutout part 411s. All the components of the top plate locking claws 411 are centered in the width direction of the first top plate portion 41.

  The connection portion 411j is interposed between the claw body portion 411t and the first top plate portion 41, and the claw body portion 411t is a maximum width portion 411a having the widest width in the vicinity of the connection portion 411j (the maximum width portion 411a). For example, it is about one third to one half of the length of the first top plate end 41b), and the width is narrowed toward the toe portion 411b. The cutout part 411 s has an elongated slit shape that spans the first top plate part 41 in the central part of the connection part 411 j.

  The top plate locking slit 421 has a main cut line portion 421a, two sub cut line portions 421b, two cutout portions 421s, a gap 421s', and a tongue portion 421t. All the components of the top plate locking slit 421 are centered in the width direction of the second top plate portion 42.

  Sub-cut line portions 421b are continuously formed at both ends of the main cut line portion 421a in a direction away from the second top plate portion rear side 42a. The distance between the main score line portion 421a and the second top plate portion rear side 42a is substantially equal to the length of the first top plate portion 41, and the first top plate portion 41 and the second top plate portion 42 are overlapped with each other. When 1 is closed, the top plate locking claw 411 can be smoothly inserted into the main cut line portion 421a.

  The length of the main cut line portion 421a is slightly shorter than the width of the maximum width portion 411a of the top plate locking claw 411. Accordingly, the top plate latching claw 411 can be easily inserted into the top plate latching slit 421, while the main cut line portion 421 a serves to prevent the top plate latching claw 411 inserted into the top plate latching slit 421.

  The cutout portion 421s is formed from the main cut line portion 421a toward the second top plate front side 42b, and the lateral width thereof is narrower than the lateral width of the connection portion 411j of the top plate locking claw 411. At the center of the cutout portion 421s, a tongue portion 421t extends toward the main cut line portion 421a, and a gap 421s' is formed between the tip of the cutout portion 421s and the main cut line portion 421a. The lateral width of the tongue portion 421t is slightly narrower than the lateral width of the cutout portion 411s of the top plate locking claw 411. The vertical width of the cutout portion 421s is slightly longer than the length of the connection portion 411j of the top plate locking claw 411, and the length of the tongue portion 421t is substantially equal to or slightly longer than the length of the connection portion 411j of the top plate locking claw 411.

  Therefore, when the top plate locking claw 411 is inserted into the top plate locking slit 421, the tongue portion 421t is locked to the cutout portion 411s of the top plate locking claw 411, and the top plate locking claw 411 is locked to the top plate. The separation from the slit 421 can be prevented.

<Vent hole>
As shown in FIG. 5, in the blank 2 </ b> A, for example, two front vent holes 205 are formed in the front plate portion 20, for example, two rear vent holes 305 are formed in the rear plate portion 30, and two right side portions are formed in the right plate portion 50. For example, two left side vent holes 605 are provided in the left plate portion 60. Further, the right front flap 51 has a right front flap vent 515, the right rear flap 52 has a right rear flap vent 525, the left front flap 61 has a left front flap vent 615, and the left rear flap 62 has a left rear flap vent 625. Is provided. Both vent holes are substantially rectangular and both ends are rounded.

  The front vent hole 205 and the rear vent hole 305 are, for example, about one third to two thirds of the height of the front plate portion 20 (rear plate portion 30), and the width is the front plate portion 20 ( The width of the rear plate portion 30) is, for example, about one-twentieth.

  The right side vent hole 505 and the left side vent hole 605 have a length that is, for example, about one third of the height of the right side plate part 50 (left side plate part 60), and the width is the bottom plate part right side 10c (bottom plate part left side 10d). ) For example. The two right side vent holes 505 and the two left side vent holes 605 are formed symmetrically with respect to the bottom plate part 10. Therefore, when the right side plate portion 50 and the left side plate portion 60 are bent in the same direction and perpendicular to the bottom plate portion 10, the two right side vent holes 505 and the two left side vent holes 605 face each other.

  The right front flap vent 515 and the left front flap vent 615 have the same shape as the front vent 205, and the right rear flap vent 525 and the left rear flap vent 625 have the same shape as the rear vent 305. When the packaging box 1A is formed by bending the blank 2A, the right front flap vent hole 515 and the left front flap vent hole 615 are formed at portions overlapping the front vent hole 205, and the right rear flap vent hole 525 and the left rear flap are formed. The vent hole 625 is formed at a portion overlapping the rear vent hole 305.

  When it is desired to shield the inside of the packaging box 1A from the outside or to prevent ventilation, no ventilation hole is provided in the packaging box.

<Unpacking tear part>
As shown in FIG. 6, the blank 2 </ b> A has an unpacking tear portion 210 on the front plate portion 20, and the unpacking tear portion 210 has a first tear line 211, a second tear line 212, and a tear start point portion 213. doing. The tear start point 213 is a tear start point for tearing the first and second tear lines 211 and 212 formed by perforations by hand, for example, in the vicinity of the intermediate point of the bottom plate front side 10a of the bottom plate 10 Is formed as a substantially rectangular cut toward the first top plate 41 side. The unpacking and tearing portion 210 has such a width that two to three fingertips can be inserted, for example, and both end sides of the edge portion on the first top plate portion 41 side are rounded.

  The starting point 211 a of the first tear line 211 is disposed at the tearing starting point part 213. The tear end point 211b is disposed on the right side 20c of the front plate part 20 of the front plate part 20, and the front end of the front plate part 20 is located between the tear end point 211b and the bottom plate part front side 10a of the bottom plate part 10. A right front side locking tongue piece 201 formed so as to be connected to a substantially central portion of the plate portion right side 20c is positioned.

  The second tear line 212 is formed symmetrically with the first tear line 211 in the front plate portion 20. A region between the first tear line 211 and the second tear line 212 and the first top plate portion front side 41a is the main front plate portion 20m, and in front of the first tear line 211 and the bottom plate portion of the bottom plate portion 10. The region between the side 10a and the region between the second tear line 212 and the bottom plate portion front side 10a of the bottom plate portion 10 are sub-front plate portions 20s.

<Bottom plate side stacking part and top plate side stacking part>
As shown in FIG. 5, the blank 2 </ b> A includes two bottom plate front side stacking portions 110 arranged on the bottom plate portion front side 10 a of the bottom plate portion 10 and two bottom plate rear sides arranged on the bottom plate portion rear side 10 b. The stacking portion 120, the two top plate front side stacking portions 410 disposed on the first top plate portion front side 41 a of the first top plate portion 41, and the second top plate portion rear side 42 a of the second top plate portion 42. It has two top plate rear side stacking parts 420 arranged on the top.

  Here, the two bottom plate front side stacking portions 110 are arranged in the center distribution on the bottom plate front side 10a, and the two bottom plate front side stacking portions 110 and the two bottom plate rear side stacking portions 120 sandwich the bottom plate portion 10 therebetween. They are arranged symmetrically. The two bottom plate front side stacking portions 110 and the two top plate front side stacking portions 410 are arranged symmetrically with the front plate portion 20 in between, and the two bottom plate rear side stacking portions 120 and the two top plate rear side stacking portions 420 are They are arranged symmetrically across the back plate 30.

  The bottom plate front side stacking portion 110 is formed as a rectangular stacking claw 110t (see FIG. 5) extending from the bottom plate portion front side 10a of the bottom plate portion 10 to the inside of the bottom plate portion 10, and the bottom plate rear side stacking portion 120 is formed as the bottom plate portion 10. It is formed as a rectangular stacked claw 120t extending from the rear side 10b of the bottom plate portion to the inside of the bottom plate portion 10. The stacking claws 110t extend from the bottom plate portion front side 10a, and the stacking claws 120t extend from the bottom plate portion rear side 10b.

  Two top plate front side stacking portions 410 are rectangular slits formed on the front plate portion 20 and the first top plate portion 41 on the first top plate front side 41a of the first top plate portion 41, Similarly, the two top plate stacking portions 420 are rectangular slits formed on the second top plate rear side 42 a of the second top plate portion 42.

  When the blank 2A is bent to form the packaging box 1A, the right front upper side 51b of the right front flap 51 is positioned inside the first top plate front side 41a of the first top plate 41. At this time, a right front upper side cut portion 510 is formed in a portion of the right front upper side 51b of the right front flap 51 positioned inside the top front stacking portion 410, and the slit of the top front stacking portion 410 is formed in the right front flap. 51 is not blocked. Similarly, a right rear upper side cut portion 520 is formed on the right rear upper side 52b of the right rear flap 52, and a left front upper side cut portion 610 is formed on the left front upper side 61b of the left front flap 61. A left rear upper side cut portion 620 is formed on the upper left side 62 b of the left rear portion 62.

  In addition, the top plate side stacking portion may be configured only by the top plate front side stacking portion 410, and the bottom plate side stacking portion may be configured by only the bottom plate front side stacking portion 110. Even in this case, when the two packaging boxes 1A are stacked, the two packaging boxes 1A can be obtained by engaging the bottom plate side stacking portion 110 of the upper packaging box 1A with the top plate side stacking portion 410 of the lower packaging box 1A. Can be stacked. Of course, the packaging box 1A may not have the bottom plate side stacking portion and the top plate side stacking portion.

<Hand hole>
As shown in FIG. 5, the blank 2 </ b> A is formed with a right handing hole 506 disposed in the right plate part 50 and a left handing hole 606 disposed in the left plate part 60. The right hand-facing hole 506 has a tongue piece defined by a substantially U-shaped cut and is formed in a portion near the upper side 50c of the right side plate portion 50 of the right side plate portion 50. The tongue piece is connected to the right side plate part 50 on the upper side 50c side of the right side plate part. The tongue piece is bent when a finger or palm is inserted into the right hand hook hole 506, and the tongue piece is in contact with a wide area such as a finger. Protect your palms. For the same purpose, the U-shaped cut has two rounded corners. Of course, the packaging box 1A may not have a hand hole.

<Assembly of packing box and accommodation of goods>
Next, assembly of the packaging box 1A will be described.

<Bending the right and left side plate parts>
First, the right front flap 51 and the right rear flap 52 are folded at a substantially right angle with respect to the right side plate portion 50 (FIG. 7A). At this time, the right inner side flap 53 is not yet bent with respect to the right side plate portion 50. Similarly, the left front flap 61 and the left rear flap 62 are valley-folded at a substantially right angle with respect to the left side plate portion 60 (not shown). Further, the right side plate portion 50 and the left side plate portion 60 are valley-folded. As shown in FIG. 7B, the right front flap 51 is placed inside the left front flap 61 and the right rear flap 52 is placed on the left rear flap 62. Position it inside.

  Then, as shown in FIG. 8A, the front locking tongue 611 of the left front flap 61 is positioned just outside the front locking hole 511 of the right front flap 51 (FIG. 8A shows the right front flap 51). And it is the figure which looked at the left front flap 61 from the front-plate part 20 side.).

  Then, when the front locking tongue 611 of the left front flap 61 is pressed with, for example, a fingertip, the front locking tongue 611 has a locking tip portion with the connecting side portion 611b as a crease line as shown in FIG. It is pushed into the front locking hole 511 of the right front flap 51 from the side 611a side (FIG. 8B shows the AA cross section in FIG. 8A, and the front locking tongue piece 611 and the front locking hole 511 are shown. It is a figure which shows the state which and were latched.).

  When the front locking tongue 611 of the left front flap 61 is pushed into the front locking hole 511 of the right front flap 51 in this way, the locking tip end side 611a of the front locking tongue 611 is the bottom of the front locking hole 511. Since it is slightly longer than the edge portion 511a, the front locking tongue piece 611 is difficult to be removed from the front locking hole 511 (in this way, the right front flap 51 and the left front flap 61 can be connected easily and reliably). ). Similarly, the right rear flap 52 and the left rear flap 62 can be easily and reliably secured by locking the rear locking tongue 621 of the left rear flap 62 in the rear locking hole 521 of the right rear flap 52. Can be linked to.

  Then, as shown in FIG. 7B, the bottom plate portion 10, the right side plate portion 50, the left side plate portion 60, the right front flap 51 and the left front flap 61, and the right rear flap 52 and the left rear flap 62 are provided. A bottom box 3A is formed. Here, since the front end portion side 611a of the front engaging tongue piece 611 and the front end portion side 621a of the rear engaging tongue piece 621 are both rounded, the article accommodated in the bottomed box 3A. Will not hurt. Further, in the bottomed box 3 </ b> A, the two right side vent holes 505 of the right side plate part 50 and the two left side vent holes 605 of the left side plate part 60 face each other.

  It is also possible to position the right front flap 51 outside the left front flap 61 and the right rear flap 52 outside the left rear flap 62. In this case, the front locking tongue 611 of the left front flap 61 is positioned inside the front locking hole 511 of the right front flap 51 as shown in FIG. The crease line is pushed into the front locking hole 511 of the right front flap 51 from the locking front end side 611a side. The same applies to the right rear flap 52 and the left rear flap 62.

<Bending the front plate and back plate>
After the bottomed box 3A is formed, the front plate portion 20 is bent so as to be in contact with the outside of the right front flap 51 and the left front flap 61, and the rear plate portion 30 is outside the right rear flap 52 and the left rear flap 62. Bend it so that it touches.

  And the right front side part locking tongue piece 201 connected with the front board part 20 is bend | folded with a fingertip, and it pushes into the right front side part locking hole 501 which the right side board part 50 has. Then, the right front side portion connecting means (see FIG. 2) constituted by the right front side portion locking tongue piece 201 connected to the front plate portion 20 and the right front side portion locking hole 501 of the right side plate portion 50 is the right front side. Similar to the front flap connecting means (see FIG. 8) configured by the front locking hole 511 of the flap 51 and the front locking tongue 611 of the left front flap 61, it is easily and reliably connected.

  Similarly, the left front side portion connecting means (see FIG. 2) constituted by the left front side portion locking tongue piece 202 connected to the front plate portion 20 and the left front side portion locking hole 602 of the left side plate portion 60 is also provided. A right rear side connecting means (FIG. 3) which is configured with a right rear side locking tongue 303 and a right rear side locking hole 503 of the right side plate 50 which are easily and reliably connected and connected to the rear plate 30. Also, the left rear side connection that is easily and surely connected and includes the left rear side locking tongue 304 that is connected to the rear plate 30 and the left rear side locking hole 604 of the left plate 60. The means (see FIG. 3) are also easily and reliably connected.

  Then, as shown in FIG. 9 (a), the front plate portion 20 is positioned so as to contact the outside of the right front flap 51 and the left front flap 61 in the bottomed box 3A, and the right rear flap 52 and the left rear flap. The bottomed box 3 </ b> B is formed by positioning so that the rear plate portion 30 contacts the outside of the flap 62. Therefore, in the bottomed box 3B, the front plate portion 20 side and the rear plate portion 30 side have a double structure (partly a triple structure), and the strength is increased. In the bottomed box 3B, the right front flap vent hole 515 and the left front flap vent hole 615 overlap with the front vent hole 205, and the right rear flap vent hole 525 and the left rear flap vent hole 625 also overlap with the rear vent hole 305.

  Here, the right front side locking tongue 201 has a rounded locking front end side 201a (left front side locking tongue 202, right rear side locking tongue 303 and left rear. The same applies to the side locking tongues 304), and does not damage the articles accommodated in the bottomed box 3B.

  In the bottomed box 3B, in the bottom plate front side stacking portion 110 formed on the bottom plate front side 10a of the bottom plate portion 10 by bending the front plate portion 20, the rectangular stacking claws 110t are located below the bottom plate front side 10a. As a result of the extension and the stacking claws 110t extending, a stacking slit 110s is formed in the vicinity of the stacking claws 110t (FIGS. 9A, 9B, etc.). In addition, as a result of bending the rear plate portion 30, in the bottom plate rear side stacking portion 120 similarly formed on the bottom plate portion rear side 10b of the bottom plate portion 10, the rectangular stacking claws 120t extend toward the lower side of the bottom plate portion rear side 10b. As a result of extending the stacking claws 120t, stacking slits 120s are formed in the vicinity of the stacking claws 120t.

<Containment of goods>
In the bottomed box 3A, there is no flap rising above the right front flap 51 and the left front flap 61 and above the right rear flap 52 and the left rear flap 62, and a short right inner flap 53 from the front right side plate portion 50. However, similarly, the left inner side flaps 63 are also raised substantially vertically from the left side plate portion 60 (see, for example, FIG. 7B). Therefore, articles can be easily accommodated inside the bottomed box 3A.

<Closing the packaging box>
After the article is stored in the bottomed box 3A, the right front side connecting means, the left front side connecting means, the right rear side connecting means and the left rear side connecting means are connected to each other to connect the bottomed box 3B. (FIG. 9A) is formed, and then the opening 300 of the bottomed box 3B is closed (the packaging box 1A is closed). Closing is performed by connection of a top plate connecting means including a top plate locking claw 411 of the first top plate portion 41 and a top plate locking slit 421 of the second top plate portion 42.

  Specifically, the right inner flap 53 and the left inner flap 63 are first bent in a direction to close the opening 300 of the bottomed box 3B. Next, as shown in FIG. 10A, the opening of the bottomed box 3 </ b> B is closed with the second top plate portion 42. At this time, the second top plate front side flap 43 of the second top plate portion 42 is bent, and then the bottomed box body so that the second top plate front side flap 43 is in contact with the right front flap 51 and the left front flap 61. Close the 3B opening.

  Next, as shown in FIG. 10B, the first top plate portion 41 is bent so as to be positioned above the second top plate portion 42. At this time, the front plate portion 20 is connected to the right side plate portion 50 by a right front side portion locking tongue piece 201 connected to the central portion of the front plate portion right side 20c, and is connected to the central portion of the front plate portion left side 20d. The left front plate portion 60 is connected to the left front plate portion locking tongue 202. Accordingly, as shown in FIG. 10B, the substantially half area (the first top plate 41 side) on the upper side of the front plate portion 20 is slightly separated from the right front flap 51 and the left front flap 61. Can be warped like a bow. The same applies to the upper side of the rear plate portion 30.

  Thus, by bending the upper side of the front plate portion 20 and the upper side of the rear plate portion 30 in a bow shape, the toe portion 411b of the top plate locking claw 411 is not bent and the top plate engagement claw 411 is bent. It can be positioned in the vicinity of the stop slit 421.

  Further, when the claw main body portion 411t of the top plate locking claw 411 is inserted into the main cut line portion 421a of the top plate locking slit 421, the claw main body portion 411t The main cut line portion 421a is passed while expanding the vicinity region, and the cutout portion 411s of the top plate locking claw 411 is positioned closer to the main cut line portion 421a than the tongue portion 421t. Thus, the claw body portion 411t of the top plate locking claw 411 is positioned inside the second top plate portion 42, and the closing of the packaging box 1A is completed as shown in FIG.

  That is, after the claw body portion 411t of the top plate locking claw 411 is bent and the toe portion 411b of the top plate locking claw 411 is positioned in the vicinity of the top plate locking slit 421, the top plate locking claw 411 and the top plate Since the locking slit 421 can be locked, the top plate locking claw 411 can close the packaging box 1A without interfering with the contents.

  At this time, as a result of the elastic vicinity of the sub-cut line portion 421b trying to return to the original, the sub-cut line portion 421b functions as a stopper for the claw body portion 411t of the top plate locking claw 411, and the top plate The tongue portion 421t is engaged with the cutout portion 411s of the pawl 411, and functions as a stopper for the claw body portion 411t. Accordingly, the top plate connecting means comprising the top plate locking claw 411 and the top plate locking slit 421 can be easily connected, while realizing a connection that is difficult to come off.

  In the packaging box 1A, as a result of the first top plate portion 41 and the second top plate portion 42 being bent, the first top plate portion 41 on the front side 41a of the first top plate portion 41 as shown in FIG. Then, a slit that is the top plate front side stacking portion 410 is formed, and a slit that is the top plate rear side stacking portion 420 is formed on the second top plate portion rear side 42 a of the second top plate portion 42.

  At this time, in the vicinity of the first top plate portion front side 41 a of the first top plate portion 41, between the bent second top plate front side flap 43 of the second top plate portion 42, the right front flap 51 and the left front flap 61. Some voids are formed. Therefore, the top plate front side stacking portion 410 is not blocked by the second top plate portion 42 and the second top plate front side flap 43.

<Breathability in packing box>
In the packaging box 1A, the front plate 20 has two front vents 205, the rear plate 30 has two rear vents 305, the right plate 50 has two right vents 505, and the left plate. 60 has two left side vent holes 605. As described above, the packaging box 1A has eight ventilation holes on the four side surfaces, and realizes air permeability between the inside and the outside.

  In the bottom plate portion 10 of the packaging box 1A, stack slits 110s are respectively formed in the two bottom plate front side stack portions 110, and stack slits 120s are respectively formed in the two bottom plate rear side stack portions 120 (FIG. 9 ( b)). These four slits achieve air permeability on the bottom plate 10 side of the packaging box 1A. In the top plate portion 40 of the packaging box 1A, slits are formed as two top plate front side stacking portions 410, and slits are formed as two top plate rear side stacking portions 420 (FIG. 10 (c)). . These four slits realize air permeability on the top plate side of the packaging box 1A.

  When the packaging box 1A is placed on the floor or the like, the two stacking claws 110t of the bottom plate front side stacking portion 110 and the two stacking claws 120t of the bottom plate rear side stacking portion 120 are connected to the floor surface and the bottom plate portion 10 of the packing box 1A. Create a gap between the two. The width (height) of the gap is substantially equal to the length of the four tongue pieces, and realizes air permeability on the lower side of the bottom plate portion 10 of the packaging box 1A.

  The stacking slit 110s and the stacking slit 120s of the bottom plate portion 10 of the packaging box 1A realize air permeability and discharge of moisture and moisture inside the packaging box 1A. For example, when fresh vegetables are accommodated, the stacking slits 110s and the stacking slits 120s serve as a discharge path for moisture or the like that has condensed in the packing box 1A.

<Unpacking the packing box>
Next, unpacking of the packaging box 1A will be described. In the packing box 1A (FIG. 10 (c)) where the packing operation is completed, first, a fingertip is inserted into the tear starting point 213, the front plate 20 is gripped, and the main front plate 20m of the front plate 20 is The first tear line 211 and the second tear line 212 are torn so as to separate from the sub-front plate portion 20s. Then, as shown in FIG. 11A, the main front plate portion 20m of the first top plate portion 41 is developed with the first top plate front side 41a as the shaft portion (at this time, the second top plate portion 42 is still will not open.).

  Further, when the main front plate portion 20m of the first top plate portion 41 is opened, the first top plate portion 41 uses the top plate locking claw 411 locked to the top plate locking slit 421 as a shaft portion and the second top plate portion 42. Deploy above. Further, by inserting a finger into the opening handle hole 44 of the second top plate portion 42 and opening the second top plate portion 42 as shown in FIG. 11 (b), the article stored in the packaging box 1A can be taken out. it can. Thus, the packaging box 1A can be easily unpacked without using a tool, and the article can be easily taken out.

<Reuse of packing box>
When reusing the unpacked packing box 1A, the main front plate 20m of the first top plate 41 is removed from the second top plate 42 of the unpacked packing box 1A (FIG. 11B). . This removal is performed by pulling out the top plate locking claw 411 of the first top plate portion 41 from the top plate locking slit 421 of the second top plate portion 42. After removing the main front plate portion 20m of the first top plate portion 41 in this way, the second top plate portion 42 is closed after the articles are accommodated in the packaging box 1A (FIG. 12).

  When closing the second top plate portion 42, the second top plate front side flap 43 is positioned inside the right front flap 51 and the left front flap 61. Even when the packaging box 1A is reused, it is possible to easily open and close the second top plate portion 42 by inserting a finger into the opening handle hole 44 of the second top plate portion 42.

  Here, the right front flap 51 and the left front flap 61 are maintained in a mutually connected state. Further, the sub front plate portion 20 s on the right side of the front plate portion 20 is connected to the right front side portion locking hole 501 formed in the right side plate portion 50 by the right front side portion locking tongue piece 201, and the left front flap 61. The right front flap 51 connected to the outer side is regulated from the outside. Further, the sub-front plate portion 20s on the left side of the front plate portion 20 is also connected to the left front side portion locking hole 602 formed in the left side plate portion 60 with the left front side portion locking tongue piece 202, and the right front flap 51 is connected. The left front flap 61 connected to is regulated from the outside.

  As described above, the packaging box 1A for reuse has a side surface on the front plate portion 20 side constituted by the right front flap 51, the left front flap 61, and the two sub front plate portions 20s, and most of the area has a double structure. It has enough strength. Of course, the right side plate portion 50, the left side plate portion 60, and the rear plate portion 30 side are the same as before the unpacking and have sufficient strength.

<About stacking packing boxes>
For example, when two packaging boxes 1A are stacked, as shown in FIG. 13, the two stacking claws 110t of the bottom plate front stacking section 110 included in the upper packaging box 1A are the front side of the top panel included in the lower packaging box 1A. Two stacking claws 120t of the bottom plate rear stacking portion 120 of the upper packaging box 1A are engaged with the stacking portion 410 2 and the slit, and the top plate rear stacking portion 420 of the lower packaging box 1A is provided. The two packing boxes 1A are stacked so as to engage with the slits 2 and the slits.

  Then, two packaging boxes 1A can be stacked so that the entire area of the bottom plate portion 10 of the upper packaging box 1A overlaps the entire area of the top plate section 40 of the lower packaging box 1A (FIG. 14). . The same applies to the case where three or more packing boxes 1A are stacked, and the packing box 1A can easily and orderly stack a plurality of packing boxes 1A in a minimum floor space.

  Here, the front plate portion 20 side of the packaging box 1A is composed of the front plate portion 20, and the connected right front flap 51 and left front flap 61, and the right front flap 51 is connected to the right plate portion 50, and The left front flap 61 is connected to the left side plate portion 60. Therefore, the front plate part 20 side has sufficient strength. The same applies to the rear plate portion 30.

  On the right side plate portion 50 side, the right side plate portion 50 is interposed between the front plate portion 20 and the rear plate portion 30 together with the right front flap 51 and the right rear flap 52. Moreover, the right front flap 51 and the right rear flap 52 are bent at a right angle with respect to the right side plate portion 50 and are interposed between the bottom plate portion 10 and the top plate portion 40. The same applies to the left side plate 60 side. Therefore, the right side plate portion 50 and the left side plate portion 60 realize the strength of the packaging box 1 </ b> A between the front plate portion 20 and the rear plate portion 30.

  In the packaging box 1A, the bottom plate portion 10, the front plate portion 20, the rear plate portion 30, the first top plate portion 41, and the second top plate portion 42 are all connected, and the second top plate portion 42 is bottomed. The opening of the box 3 </ b> B is closed, and approximately one half of the surface of the second top plate portion 42 is covered with a first top plate portion 41 connected to the second top plate portion 42. Moreover, in the packaging box 1A, the top plate portion 40 is composed of the first top plate portion 41 and the second top plate portion 42, and a part thereof has a double structure and is difficult to dent.

  Further, the packaging box 1 </ b> A has a single-plate bottom plate portion 10, and the bottom plate portion 10 is continuously connected to the front plate portion 20, the rear plate portion 30, the right side plate portion 50, and the left side plate portion 60. Therefore, the bottom plate portion 10 of the packaging box 1A has sufficient strength (the bottom plate portion 10 is difficult to come off).

  When two packaging boxes 1A are arranged side by side, for example, as shown in FIG. 15, the entire area of the right side plate portion 50 of one packing box 1A and the entire area of the left side plate portion 60 of the other packing box 1A Line up so that they touch. Here, since the two right side vent holes 505 of the right side plate portion 50 and the two left side vent holes 605 of the left side plate portion 60 face each other, the two right side portions of the right side plate portion 50 of one packing box 1A. The ventilation hole 505 and the two left side ventilation holes 605 of the left side plate part 60 of the other packaging box 1A are in communication with each other without being displaced. The same applies when three or more packing boxes 1A are arranged side by side.

  When the two packing boxes 1A are arranged vertically, for example, as shown in FIG. 16, the entire area of the rear plate 30 of one packing box 1A and the entire area of the front plate 20 of the other packing box 1A Line up so that they touch.

  In the blank 2A, for example, if the two front vent holes 205 included in the front plate portion 20 and the two rear vent holes 305 included in the rear plate portion 30 are formed symmetrically with the bottom plate portion 10 interposed therebetween, The two rear vent holes 305 of the rear plate portion 30 of the packaging box 1A and the two front vent holes 205 of the front plate portion 20 of the other packaging box 1A are in communication with each other without shifting. That is, even when arranged vertically, the packaging box 1A has good air permeability.

  As described above, the packaging box 1A can secure good air permeability in any case when stacked, horizontally arranged, vertically arranged. It can be secured.

  As mentioned above, although one Example of the packaging box which concerns on this invention was described, this invention can be suitably deform | transformed and implemented, without changing the meaning.

  Since the packaging box according to the present invention can be manufactured industrially, etc., it can be used for transportation and storage of goods, etc., and can be used for commercial transactions. It is an invention that has value and industrial applicability.

1A Packing box 2A Blank 10 Bottom plate portion 20 Front plate portion 201 Right front side portion locking tongue piece (right front side portion connecting means)
202 Left front side locking tongue (left front side connecting means)
205 Front vent (vent)
30 Rear plate portion 303 Right rear side portion locking tongue (right rear side portion connecting means)
304 Left rear side locking tongue (left rear side connecting means)
305 Rear vent (vent)
40 Top plate portion 41 First top plate portion 42 Second top plate portion 411 Top plate locking claw (top plate connecting means)
421 Top plate locking slit (top plate connecting means)
50 Right side plate portion 51 Right front flap 52 Right rear flap 501 Right front side locking hole (right front side connecting means)
503 Right rear side locking hole (right rear side connecting means)
505 Right side vent (vent)
511 Front locking hole (front flap connecting means)
521 Rear locking hole (rear flap connecting means)
60 Left side plate part 61 Left front flap 62 Left rear flap 602 Left front side locking hole (left front side connecting means)
604 Left rear side locking hole (Left rear side connecting means)
605 Left side vent (vent)
611 Front locking tongue (front flap connecting means)
621 Rear locking tongue (rear flap connecting means)

Claims (8)

A substantially quadrangular bottom plate, a front plate connected to the front of the bottom plate, a rear plate connected to the rear of the bottom plate, a right plate connected to the right of the bottom plate, and the bottom plate A packaging box formed by bending a blank formed of cardboard or cardboard having a left side plate part connected to the left side of the part,
The blank is
A right front flap connected to the front of the right side plate portion;
A right rear flap connected to the rear of the right side plate portion;
A left front flap connected to the front of the left side plate portion;
A left rear flap connected to the rear of the left side plate portion;
A first top plate connected to the bottom plate via the front plate,
A second top plate portion connected to the bottom plate portion via the rear plate portion and having substantially the same shape as the bottom plate portion;
A second top plate front flap connected to a side of the second top plate portion facing the rear plate portion;
Front flap connecting means for connecting the right front flap and the left front flap;
A rear flap connecting means for connecting the right rear flap and the left rear flap;
A top plate locking claw formed on the first top plate portion and a top plate locking slit formed on the second top plate portion to connect the first top plate portion and the second top plate portion. And
Furthermore, just by folding the first top plate portion in the vicinity of the second top plate front flap side in the top plate locking slit of the second top plate portion bent toward the front plate portion side. In order to be able to position the tip of the top plate locking claw of the first top plate portion,
The front plate portion bent so as to be in contact with the outer front surface of the right front flap and the left front flap connected by the front flap connecting means is warped in a substantially half region on the first top plate portion side. And for connecting the front plate part with the right side plate part and the left side plate part so as to be separated from the right front flap and the left front flap,
In a portion that is approximately in the middle between the bottom plate portion and the first top plate portion, a right front side locking tongue piece formed on one of the front plate portion and the right plate portion and the other is formed. A right front side connecting means having a right front side portion locking hole, and a portion that is substantially in the middle between the bottom plate portion and the first top plate portion, either the front plate portion or the left side plate portion. A left front side connecting means having a left front side locking tongue formed and a left front side locking hole formed on the other;
Further, the half of the rear plate portion that is bent so as to be in contact with the outer rear surface of the right rear flap and the left rear flap connected by the rear flap connecting means on the second top plate side. For connecting the rear plate portion to the right side plate portion and the left side plate portion so that the rear plate portion can be bent and separated from the right rear flap and the left rear flap.
At a portion that is substantially in the middle between the bottom plate portion and the second top plate portion, a right rear side locking tongue piece formed on one of the rear plate portion and the right plate portion and the other is formed. In the right rear side portion connecting means having the right rear side portion locking hole, and in the portion that is substantially in the middle between the bottom plate portion and the second top plate portion, either the rear plate portion or the left side plate portion. A left rear side portion connecting tongue having a left rear side portion locking tongue formed and a left rear side portion locking hole formed on the other,
Furthermore, for opening the packaging box closed by the first top plate portion and the second top plate portion that are connected by locking the top plate locking claw to the top plate locking slit,
Between the right front side portion locking tongue piece or the right front side portion locking hole and the first top plate portion in the right side portion of the front plate portion from the vicinity of the boundary between the front plate portion and the bottom plate portion. A first tear line formed over the site;
Between the vicinity of the boundary between the front plate portion and the bottom plate portion, between the left front side portion locking tongue piece or the left front side portion locking hole and the first top plate portion on the left side portion of the front plate portion. A second tear line formed over the site;
A tear start point disposed between the first tear line and the second tear line and in the vicinity of a central portion on a boundary line between the front plate portion and the bottom plate portion;
A packaging box comprising: The distance between the boundary between the bottom plate portion and the front plate portion, which is the front side of the bottom plate portion, and the boundary between the bottom plate portion and the rear plate portion, which is the rear side of the bottom plate portion, is the front side of the second top plate portion. Slightly longer than the distance between the boundary between the second top plate portion and the second top plate front side flap and the boundary between the second top plate portion and the rear plate portion as the rear side of the second top plate portion,
When the blank is folded to form the packaging box, the second top plate front flap is positioned so as to be substantially in contact with the right front flap and the left front flap connected by the front flap connecting means. The packaging box according to claim 1. In the packaging box according to claim 1 or 2,
The packaging box, wherein the second top plate part further has an opening handle hole.   The packaging box according to any one of claims 1 to 3, wherein all or at least one of the right side plate portion, the left side plate portion, the front plate portion, and the rear plate portion has a vent hole. Packing box to do.   The packaging box according to claim 4, wherein when the front plate portion and the rear plate portion have the vent holes, all of the right front flap, the right rear flap, the left front flap, and the left rear flap are all included. Alternatively, any one of the packaging boxes further includes a flap ventilation hole. In the packaging box according to any one of claims 1 to 5,
The blank further includes a right inner flap connected to the bottom plate portion via the right side plate portion, and a left inner flap connected to the bottom plate portion via the left side plate portion. . In the packaging box according to any one of claims 1 to 6,
The blank further includes a bottom plate side stacking portion provided on both or one of the boundary between the bottom plate portion and the front plate portion and the boundary between the bottom plate portion and the rear plate portion, and
Both the first top plate portion front side that is the boundary between the first top plate portion and the front plate portion and the second top plate portion rear side that is the boundary between the second top plate portion and the rear plate portion, or A top plate side stacking portion provided on one side,
When the bottom plate side stacking portion is provided at the boundary between the bottom plate portion and the front plate portion, the bottom plate side stacking portion and the top plate side stacking portion are disposed symmetrically across the front plate portion. Has been
When the bottom plate side stacking portion is provided at the boundary between the bottom plate portion and the rear plate portion, the bottom plate side stacking portion and the top plate side stacking portion are disposed symmetrically across the rear plate portion. A packaging box characterized by being made.   The packaging box according to claim 7, wherein the bottom plate side stacking portion has a stacking claw, and the top plate side stacking portion has a stacking slit.

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