JP2021187539A - Packaging box - Google Patents

Abstract

[Problem] To provide a packaging box that can easily form a columnar body. [Solution] A packaging box 1 includes a body 3 consisting of a front plate 21 that holds the spout of the bag, a back plate 22, a first side plate 23 and a second side plate 24, and bottom flaps 21a, 22a, 23a, 24a, and a bottom cover 5 consisting of a laminate of bottom flaps, with the bottom flap 22a connected to the back plate 22 superimposed as the outermost layer. The bottom flap 22a includes a plurality of fold lines 29, 30 that extend along the base edge between the tip edge and the base edge and connect both end edges. [Selected Figure] Figure 1

Description

The present invention relates to a packaging box.

Conventionally, a packaging box (so-called bag-in-box) for accommodating a bag containing a liquid such as a liquid beverage, liquid cosmetics, or liquid chemical and holding an outer shape is known. The bag body is provided with a spout for pouring out the enclosed liquid.

By passing the spout of the bag through one surface of the back-in box, the liquid enclosed in the bag can be poured out from the spout while the bag is housed. can. However, in the back-in box, if the liquid enclosed in the bag body is continuously poured out from the spout, the liquid cannot be poured out from the spout due to the structure of the bag body, and a certain amount of liquid is used. Remains in the bag as leftovers.

Therefore, in order to reduce the amount of liquid remaining in the bag, the side view triangles protruding outward from the bottom lid by operating the two flaps constituting the bottom lid of the bag-in-box. A bag-in-box capable of forming a columnar body of the above is known (see, for example, Patent Document 1).

According to the bag-in-box described in Patent Document 1, the portion of the bag-in-box in which the surface penetrating the spout of the bag is in contact with the bottom lid and the apex of the side view triangle of the columnar body are outward from the bottom lid. By grounding the portion that becomes the apex protruding from the bag-in-box, the bag-in-box can be tilted toward the spout side by raising the opposite side of the bag-in-box to the side through which the spout is penetrated. , The amount of liquid remaining in the bag can be reduced.

Japanese Unexamined Patent Publication No. 2019-99247

However, the bag-in-box described in Patent Document 1 needs to form the columnar body by combining two flaps with each other, and has the disadvantage that the operation of forming the columnar body becomes complicated.

INDUSTRIAL APPLICABILITY The present invention can eliminate such inconvenience, easily form a columnar body protruding outward from the bottom lid, and reduce the amount of liquid remaining in the bag contained therein. The purpose is to provide.

In order to achieve such an object, the first packaging box of the present invention is a packaging box for accommodating a bag having a spout for pouring liquid, and is held by penetrating the spout of the bag. A front plate capable of forming a holding hole, a back plate facing the front plate, a first side plate and a second side plate for connecting the front plate and the back plate to form a body portion, and the like. It consists of a front plate, the back plate, the flaps connected to the first side plate, the second side plate, and the flaps connected to the back plate, which are laminated on the outermost layer. The flap, which is provided with a bottom lid and is connected to the back plate, has a space between the tip edge and the proximal edge without crossing multiple crease lines extending along the proximal edge and connecting both end edges. It is characterized in that it is provided.

In the packaging box of the present invention, the flaps connected to the front plate, the back plate, the first side plate, and the second side plate are bent at the connecting portions, and the flaps connected to the back plate are bent. It is provided with the bottom lid made of a laminated body of each flap obtained by polymerizing the outermost layer.

In the packaging box of the present invention, among the flaps forming the bottom lid, the flaps connected to the back plate laminated on the outermost layer are formed along the proximal edge between the distal edge and the proximal edge. It is provided with a plurality of crease lines that extend and connect both end edges, and by bending the flap along the crease line, a tubular body that protrudes outward from the bottom lid can be formed.

Therefore, according to the packaging box of the present invention, the tubular body can be formed by manipulating a single flap called the flap of the outermost layer among the flaps forming the bottom lid. The operation of forming a tubular body can be easily performed. Further, according to the packaging box of the present invention, when the liquid is poured out from the spout of the stored bag body, the portion where the front plate is in contact with the bottom lid and the bottom lid of the tubular body are the most. By grounding the portion protruding outward, the side of the bag body opposite to the side through which the spout is penetrated can be raised so that the packaging box can be tilted toward the spout side, and the bag can be tilted. The amount of liquid remaining in the body can be reduced.

In the packaging box of the present invention, the flap connected to the back plate is provided with a claw portion at the tip edge, and the claw portion can be inserted at a predetermined position on the side close to the base end edge. It is preferable to provide an insertion port forming portion for forming the above.

When the flap connected to the face plate includes the claw portion and the insertion opening forming portion, when forming the tubular body, the insertion opening is formed in the insertion opening forming portion, and the insertion opening is formed in the insertion opening. By inserting the claw portion, the shape of the tubular body can be held more firmly.

In the packaging box of the present invention, the flap connected to the back plate may have three or more crease lines, but for example, the flap extends along the proximal edge between the distal edge and the proximal edge. It is provided with a first crease line connecting both end edges and a second crease line extending along the proximal edge between the first fold line and the proximal edge to connect both end edges, and the tip edge and the first edge. The fold line and the second fold line are parallel to the base end edge, and the first fold line and the second fold line are bent to form a bottom lid on the outer surface on the tip side of the first fold line. It is preferable that a triangular cylinder can be formed by polymerizing on the outer surface of another flap.

In the packaging box of the present invention, when the tubular body is crushed by the load of the packaging box, the side of the bag body opposite to the side through which the spout is penetrated is raised to raise the packaging box to the spout. There is concern that it will not be possible to incline to the side. However, the packaging box of the present invention is provided with the first fold line and the second fold line, and the first fold line and the second fold line can be bent to form a triangular cylindrical body. The triangular tubular body can be made difficult to be crushed by the load of the packaging box, and the packaging box can be kept tilted toward the spout side.

Further, since the tip edge, the first fold line, and the second fold line are parallel to the base end edge, the triangular tubular body can be easily formed, and the triangular tubular body can be easily formed. Since the load of the packaging box can be evenly applied in the length direction of the above, the triangular cylinder can be made less likely to be crushed by the load of the packaging box.

In the packaging box of the present invention, for example, the flap connected to the back plate has a distance from the tip edge to the second fold line larger than the distance from the base end edge to the second fold line. By doing so, the triangular tubular body can be formed. At this time, if the angle formed by the portion from the second fold line to the first fold line and the portion from the first fold line to the tip edge is an acute angle, the load of the packaging box is applied to the triangular cylinder. At that time, the portion from the first fold line to the tip edge moves along the outer surface of the other flap forming the bottom lid in a direction away from the base end edge, and finally the triangular tubular body is crushed. There is concern that it will be.

Therefore, in the packaging box of the present invention, when the flap connected to the back plate can form the triangular tubular body, the square of the distance from the base end edge to the second fold line is the second fold. It is preferably equal to or greater than the sum of the square of the distance from the line of sight to the first fold line and the square of the distance from the first fold line to the tip edge. The square of the distance from the base edge to the second fold line is the sum of the square of the distance from the second fold line to the first fold line and the square of the distance from the first fold line to the tip edge. With the above, the angle formed by the portion from the second fold line to the first fold line and the portion from the first fold line to the tip edge can be a right angle or an obtuse angle, and the triangular tubular body can be formed. Even when the load of the packaging box is applied, the portion from the first fold line to the tip edge is suppressed from moving in a direction away from the proximal edge along the outer surface of the other flap forming the bottom lid. Therefore, it is possible to prevent the triangular tubular body from being crushed.

Further, in the packaging box of the present invention, the flap connected to the back plate has an adhesive portion connected to the tip edge via a breakable line and adhered to the outer surface of another flap forming the bottom lid. Is preferable. In the packaging box of the present invention, since the flap connected to the back plate has the adhesive portion, the adhesive portion is adhered to the outer surface of another flap forming the bottom lid in an unused state, and the spine is said. The flaps connected to the face plate can be the outermost layer of the laminated body of each flap forming the bottom lid, and when in use, the breakable line is broken and the region from the tip edge to the base edge edge is used. A tubular body or a triangular tubular body can be formed.

Further, the second packaging box of the present invention is a packaging box for accommodating a bag having a spout for pouring liquid, and can form a holding hole for penetrating and holding the spout of the bag. Front plate, back plate facing the front plate, first side plate and second side plate forming a body by connecting the front plate and the back plate, the front plate, and the back. A bottom lid composed of a face plate, flaps connected to the first side plate, the second side plate, and a laminate of the first side plate or the flaps obtained by superimposing the second side plate on the outermost layer. The flap laminated on the outermost layer is a breakable line extending from a first position separated from the end edge on the back plate side by a predetermined distance to the end edge on the front plate side of the flap. , A second position separated from the edge on the back plate side by a predetermined distance from the first position, has a breakable line extending convexly toward the front plate side, and breaks the breakable line. The swinging tongue piece formed on the flap laminated on the outermost layer intersects a plurality of crease lines connecting the end edge on the first side surface plate side and the end edge on the second side surface plate side. It is characterized in that it is provided at intervals without any trouble.

That is, in the first packaging box, the flap connected to the back plate is bent along the crease line to form a tubular body protruding outward from the bottom lid. However, the present invention is not limited to this, and in the second packaging box, the flaps connected from the first side plate or the second side plate and polymerized on the outermost layer of the bottom lid are bent so as to protrude outward from the bottom lid. Form a tubular body.

Specifically, first, a breakable line extending from a first position provided on the outer flap at a predetermined distance from the end edge on the back plate side to the end edge on the front plate side of the flap, or , The second position separated from the edge on the back plate side by a predetermined distance from the first position is connected, and the rocking is caused by breaking along a breakable line extending convexly toward the front plate side. Form a piece of tongue. Then, by bending the swinging tongue piece along the crease line, a tubular body protruding outward from the bottom lid can be formed.

Therefore, according to the second packaging box of the present invention, the tubular body can be formed by manipulating a single flap called the flap of the outermost layer among the flaps forming the bottom lid. The operation of forming the tubular body can be easily performed. Further, according to the packaging box of the present invention, when the liquid is poured out from the spout of the stored bag body, the portion where the front plate is in contact with the bottom lid and the bottom lid of the tubular body are the most. By grounding the portion protruding outward, the side of the bag body opposite to the side through which the spout is penetrated can be raised so that the packaging box can be tilted toward the spout side, and the bag can be tilted. The amount of liquid remaining in the body can be reduced.

The development view which shows the 1st Embodiment of the packaging box of this invention. FIG. 3 is a perspective view showing a usage state of a packaging box obtained by assembling the developed view shown in FIG. FIG. 2 is a perspective view seen from the bottom surface showing an unused state of the packaging box shown in FIG. 2. The development view which shows the modification of the 1st Embodiment of the packaging box of this invention. The development view which shows the 2nd Embodiment of the packaging box of this invention. The development view which shows the modification of the 2nd Embodiment of the packaging box of this invention. The development view which shows the modification of the 2nd Embodiment of the packaging box of this invention.

Next, the first embodiment (first embodiment) of the present invention will be described in more detail with reference to the accompanying drawings.

The packaging box 1 of the first embodiment is a so-called bag-in-box that houses a bag body (not shown) having a spout for pouring a liquid, and has a shape shown in the unfolded state (outer surface side) in FIG. It is formed into the shape shown in FIG. 2 by a piece of corrugated cardboard 2 punched in.

The corrugated cardboard 2 is a first side plate 23 that connects a front plate 21 that penetrates and holds a spout of a bag (not shown), a back plate 22 that faces the front plate 21, and the front plate 21 and the back plate 22. And a second side plate 24. Here, the front plate 21 is connected to the first side surface plate 23 via the crease line 31 on one side, and is connected to the first side surface plate 23 via the crease line 32 on the opposite side of the side connected to the first side surface plate 23. 2 It is connected to the side plate 24. Further, the second side plate 24 is connected to the back plate 22 via the crease line 33 on the side opposite to the side connected to the front plate 21, and the back plate 22 is connected to the second side plate 24. It is connected to the adhesive piece 25 via the crease line 34 on the opposite side of the side.

Further, the front plate 21 is connected to the bottom flap 21a via the crease line 41 at a side parallel to the direction of connecting to the first side plate 23 and the second side plate 24, and is connected to the bottom flap 21a on the side connected to the bottom flap 21a. It is connected to the upper surface flap 21b via the crease line 51 on the opposite side. The back plate 22 is connected to the bottom flap 22a via the crease line 42 at a side parallel to the direction of connection to the second side surface plate 24, and the crease line 52 is connected to the side opposite to the side connected to the bottom flap 22a. It is connected to the upper surface flap 22b via.

The first side plate 23 is connected to the bottom flap 23a via the crease line 43 at a side parallel to the direction of connection to the front plate 21, and the crease line 53 is connected to the side opposite to the side connected to the bottom flap 23a. It is connected to the upper surface flap 23b via. The second side plate 24 is connected to the bottom flap 24a via the crease line 44 at a side parallel to the direction of connecting to the front plate 21 and the back plate 22, and the side opposite to the side connected to the bottom flap 24a. It is connected to the upper surface flap 24b via the crease line 54.

Further, the front plate 21 is connected to a holding hole forming portion 211 capable of forming a holding hole for holding a holding hole through which a spout of a bag (not shown) is penetrated in a portion close to the bottom flap 21a, and is connected to the holding hole. A holding member forming portion 212 capable of forming a holding member for holding the spout penetrated through the holding hole is provided. The holding hole forming portion 211 includes a perforation 211a formed in a circle along the spout, and a crease line 211b formed so as to divide the circle formed by the perforation 211a into a semicircle. The holding member forming portion 212 extends diagonally from the perforation line 211a in the direction of the crease line 31 or the crease line 32 by a predetermined length, and then extends in a direction close to the upper surface flap 21b along the crease line 31 or the crease line 32. It is composed of a pair of left and right perforations 212a and 212b formed by extending the length, and a crease line 212c connecting the ends of the perforations 212a and 212b on the crease line 51 side.

Further, the front plate 21 is provided with a finger insertion portion forming portion 213 capable of forming a finger insertion portion in a portion close to the upper surface flap 21b, and the back plate 22 is provided with a finger in a portion facing the finger insertion portion forming portion 213. A finger insertion portion forming portion 221 capable of forming the insertion portion is provided. The finger insertion portions 213 and 221 are provided with perforations 213a and 221a formed in an oval shape parallel to the crease line 51, respectively.

By the way, the bottom flap 22a connected to the back plate 22 via the fold line 42 has an adhesive portion 26 at the tip portion separated from the back plate 22, and is broken parallel to the crease line 42 on the back plate 22 side of the adhesive portion 26. It is equipped with a possible line 27. The breakable line 27 is formed by, for example, a synthetic resin tape (not shown) attached to the back surface of the bottom flap 22a and perforations 27a and 27b formed on both sides of the synthetic resin tape along the length direction of the synthetic resin tape. , Is formed to a predetermined width.

The bottom flap 22a connected to the back plate 22 has a perforation 27b as a tip edge, while the crease line 42 is a proximal edge, and a tubular body forming portion is formed in the region between the distal edge and the proximal edge. 28 is provided, and the tubular body forming portion 28 extends along the proximal edge and connects the both end edges to the first fold line 29, and is formed at the proximal edge between the first fold line 29 and the proximal edge. A second fold line 30 extending along the edge and connecting both end edges is provided, and the tip edge, the first fold line 29, and the second fold line 30 are parallel to the base end edge. The adhesive portion 26 is connected to the tip edge via a breakable line 27.

When forming the packaging box 1 from the corrugated cardboard 2, first, the corrugated board 2 is bent along the crease lines 31, 32, 33, 34, and the adhesive piece 25 is adhered to the back side surface of the first side plate 23. As a result, as shown in FIG. 2, a tubular body portion 3 composed of a first side plate 23, a front plate 21, a second side plate 24, and a back plate 22 is formed. Next, the top flaps 21b, 22b, 23b, and 24b are bent inward along the crease lines 51, 52, 53, and 54, respectively, and laminated to form the top lid 4, and the bottom surface is formed. The bottom lid 5 is formed by bending the flaps 21a, 22a, 23a, and 24a inward along the crease lines 41, 42, 43, and 44, respectively, and laminating them.

When forming the upper lid 4, first, the upper surface flaps 21b and 22b are bent, then the upper surface flaps 23b and 24b are bent so that the upper surface flaps 23b and 24b are laminated on the upper surface flaps 21b and 22b so as to face each other. To.

On the other hand, when forming the bottom lid 5, first, the bottom flaps 23a and 24a are bent, then the bottom flaps 21a and 22a are bent, and the bottom flaps 21a and 22a are laminated on the bottom surfaces 23a and 24a so as to face each other. To do so. As a result, the bottom flap 22a connected to the back plate 22 becomes the outermost layer of the bottom lid 5. At this time, the bottom surface flap 22a is adhered to either the bottom surface flap 23a or the bottom surface flap 24a adjacent to the lower layer at the adhesive portion 26 to form a part of the bottom lid 5.

In the packaging box 1 formed as described above, by punching out the perforations 213a and 221a of the finger insertion portions forming portions 213 and 221, the finger insertion portions for carrying are provided with the front plate 21 and the back plate 22. Can be formed into. It should be noted that the finger insertion portion forming portions 213 and 221 break the perforations 213a and 221a by making a part of the perforations 213a and 221a into crease lines, and bend inward along the crease lines to insert the fingers. It is also possible to form a recess.

Further, in the packaging box 1, by punching out the perforations 211a of the holding hole forming portion 211, it is possible to form a holding hole that penetrates and holds the spout of the bag body (not shown). Further, by breaking the pair of left and right perforations 212a and 212b of the holding member forming portion 212, the region sandwiched between the perforations 212a and 212b can be used as the holding member.

At this time, a semi-circular finger hook portion is formed by punching out a half portion of the perforation 211a on the crease line 41 side and bending it inward along the crease line 211b, and a finger is placed on the finger hook portion and pulled outward. As a result, the pair of left and right perforations 212a and 212b of the holding member forming portion 212 can be easily broken. The holding member is provided with a semi-circular engaging portion at the end portion on the bottom surface flap 21a side by punching out the perforation 211a of the holding hole forming portion 211.

In the packaging box 1, by bending the holding member toward the outside of the packaging box 1 along the crease line 212c, a hole for drawing out the spout of the bag can be formed, and the holding member can be pulled out from the hole. After engaging the spout of the bag body with the bottom flap 21a side of the holding hole (the semicircular portion formed by the remaining portion on the crease line 41 side after the perforation 211a is punched out), the holding member said. By engaging the engaging portion (the semicircular portion formed by the remaining portion on the crease line 212c side after the perforation 211a is punched out) with the spout, the spout can be held in the holding hole. ..

Next, when the liquid enclosed in the bag body is poured out from the spout, the breakable line 27 of the bottom flap 22a forming the outermost layer of the bottom lid 5 is broken. The bottom surface flap 22a is adhered to either the bottom surface flap 23a or the bottom surface flap 24a adjacent to the lower layer at the adhesive portion 26 as described above, but when the breakable line 27 is broken, a tubular body of the bottom surface flap 22a is formed. The portion 28 is separated from the adhesive portion 26 and can be bent.

Therefore, in the packaging box 1, the tubular body forming portion 28 is bent at the first fold line 29 and the second fold line 30, so that the main part thereof is enlarged and shown in FIG. The body P can be formed. In the tubular body P, the region between the tip edge (perforation 27b) of the tubular body forming portion 28 formed by breaking the breakable line 27 and the first crease line 29 is defined as the first side wall portion 281. The region between the first fold line 29 and the second fold line 30 is referred to as the second side wall portion 282, and the region between the second fold line 30 and the fold line 42 is referred to as the third side wall portion 283. It is formed by superimposing the outer surface of the portion 281 on the outer surface of either the bottom flap 23a or the bottom flap 24a adjacent to the lower layer, while the tip edge is abutted against the back surface side of the proximal edge (crease line 42). To. In the bottom flap 22a, the distance a from the tip edge of the tubular body forming portion 28 to the second fold line 30 is larger than the distance b from the proximal end edge (fold line 42) to the second fold line 30 (a>. b) makes it possible to form a cylindrical body P having a triangular side view.

At this time, if the angle θ formed by the first side wall portion 281 and the second side wall portion 282 is an acute angle, the first side wall portion 281 when the load of the packaging box 1 is applied to the cylindrical body P having a triangular side view. Moves along the outer surface of either the bottom flap 23a or the bottom flap 24a forming the bottom lid 5 in a direction away from the proximal edge, and finally the side-viewing triangular tubular body P may be crushed. I am concerned.

Therefore, the square of the distance b from the base end edge (fold line 42) of the third side wall portion 283 to the second fold line 30 is the distance c from the tip edge of the first side wall portion 281 to the first fold line 29. It is set to be larger than the sum of the square and the square of the distance d from the first fold line 29 to the second fold line 30 of the second side wall portion 282 (b ² ≧ c ² + d ² ). As a result, the angle θ formed by the first side wall portion 281 and the second side wall portion 282 is a right angle or an obtrusive angle (θ ≧ 90 °). Therefore, in the packaging box 1, as shown in FIG. When the liquid is poured out from the spout, the front plate 21 is in contact with the bottom lid 5, and the second fold line 30 is the apex of the side view triangle of the tubular body P protruding outward from the bottom lid 5. By grounding and on the floor surface F, the back plate 22 side can be made higher than the front plate 21 side through which the spout of the bag body is penetrated, and the packaging box 1 can be tilted toward the spout side. It is possible to reduce the amount of liquid remaining in the bag.

Further, as shown in FIG. 4, the corrugated cardboard board 2 forming the packaging box 1 has a claw portion 284 on the tip edge (perforation 27b) of the tubular body forming portion 28 formed by breaking the breakable line 27. On the other hand, the insertion port forming portion 285 into which the claw portion 284 is inserted may be provided in the portion along the fold line 42 of the tubular body forming portion 28. The corrugated cardboard 2 shown in FIG. 4 is a modified example of the corrugated cardboard 2 forming the packaging box 1, and the same configuration as the corrugated cardboard 2 shown in FIG. 1 is designated by the same reference numeral, and a detailed description thereof will be given. Omit.

In the corrugated cardboard 2 shown in FIG. 4, the insertion slot forming portion 285 is composed of perforations 285a formed in a shape along the thickness direction of the end portion of the claw portion 284. When the tubular body forming portion 28 includes the claw portion 284 and the insertion opening forming portion 285, when forming the tubular body P, an insertion opening is formed in the insertion opening forming portion 285, and a claw is formed in the insertion opening. By inserting the portion 284, the shape of the tubular body P can be held more firmly.

In the first embodiment, the bottom flap 22a connected to the back plate 22 is provided with two fold lines, a first fold line 29 and a second fold line 30, between the tip edge and the base end edge. However, the bottom flap 22a may be provided with three or more crease lines between the tip edge and the proximal edge, or may form a polygonal tubular body P having a quadrangle or more in a side view. .. Further, in the first embodiment, in the bottom flap 22a connected to the back plate 22, the tip edge, the first fold line 29, and the second fold line 30 are parallel to the base end edge, but the bottom flap 22a is It is sufficient that the cylindrical body P can be formed by the tubular body forming portion 28, and the tip edge, the first fold line 29, and the second fold line 30 do not have to be parallel to the base end edge.

Next, a second embodiment (second embodiment) of the present invention will be described with reference to FIG. As for the packaging box of the second embodiment, in the first embodiment, the tubular body P is formed from the bottom flap 22a connected to the back plate 22, but the bottom surface connected to the first side plate 23 has been described. It differs in that the tubular body P is formed from the flap 123a. The bottom flap 123a may be connected to the second side plate 24 instead of the first side plate 23.

Hereinafter, the same configurations as those of the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and only the differences will be described.

In the corrugated board board 12, the front plate 21 is connected to the bottom flap 121a via the crease line 41 at a side parallel to the direction of the first side plate 23 and the second side plate 24, and the back plate 22 is the second. It is connected to the bottom flap 122a via the crease line 42 at a side parallel to the direction of connection to the side plate 24.

The first side surface plate 23 is connected to the bottom flap 123a via the crease line 43 on a side parallel to the direction of connection to the front plate 21.

The bottom flap 123a is provided with a fixing portion 131 on the side edge portion on the back plate 22 side in the state where the packaging box 1 is formed, and the perforation 132 extending from the side edge on the front plate 21 side to the fixing portion 131 along the crease line 43. It is equipped with.

The bottom flap 123a includes a tubular body forming portion 128 in a region excluding the fixing portion 131. The tubular body forming portion 128 has a crease line 133 extending from the tip of the perforation 132 to the tip along the side edge of the bottom flap 123a as a proximal edge, and the distal edge (side edge on the front plate 21 side) and the proximal edge. In the area between the first fold line 134 extending along the proximal edge and connecting both end edges, and extending along the proximal edge between the first crease line 134 and the proximal edge. A second fold line 135 connecting both end edges is provided, and the tip edge, the first fold line 134, and the second fold line 135 are parallel to the base end edge.

When the packaging box 1 is formed of the corrugated cardboard 12, the bottom flaps 121a, 22a, 123a, and 24a are bent inward along the crease lines 41, 42, 43, and 44, respectively, to form the bottom surface. The bottom lid 5 is formed by stacking the flaps 123a as the outermost layer.

The bottom flap 123a is adhered to the bottom flap 24a by the fixing portion 131, but a part of the other region excluding the fixing portion 131 may be detachably adhered to the bottom flap 24a. The tip edge (side edge on the front plate 21 side) side from the line of sight 134 may be attached to the front plate 21 with tape.

Next, when forming the tubular body P, the perforation 132 of the bottom flap 123a forming the outermost layer of the bottom lid 5 is broken. At this time, as described above, when a part of the other region except the fixing portion 131 is adhered to the bottom flap 24a, or the tip edge (side edge on the front plate 21 side) side is taped to the front plate 21. If it is affixed, it is peeled off and then broken.

As described above, the bottom flap 123a is adhered to the bottom flap 24a or the like adjacent to the lower layer by the fixing portion 131, but when the perforation 131 is broken, the tubular body forming portion 128 of the bottom flap 123a is adhered to the bonding portion 26. It will be supported and hung, and will be ready for bending.

Therefore, in the packaging box 1, the tubular body P having a triangular side view can be formed by bending the tubular body forming portion 128 at the first fold line 134 and the second fold line 135.

The corrugated cardboard 13 shown in FIG. 6 is a modified example of the corrugated cardboard 12 forming the packaging box 1, and the same components as those of the corrugated board 2 shown in FIG. 5 are designated by the same reference numerals, and detailed description thereof will be omitted. ..

In the corrugated cardboard 13 shown in FIG. 6, the perforation 133 of the bottom flap 123a extends from the side edge on the front plate 21 side to the fixing portion 131 while gradually approaching the crease line 43.

According to the packaging box 1 provided with the perforations 132, in addition to the fixing portion 131, the region between the perforations 132 and the crease line 43 of the bottom flap 123a can also be adhered to the bottom flap 24a and the like. The strength of the packaging box 1 can be increased.

The corrugated cardboard 14 shown in FIG. 7 is a further modification of the corrugated board 12 forming the packaging box 1, and the same configuration as the corrugated board 2 shown in FIG. 5 is designated by the same reference numerals and detailed description thereof is omitted. do.

In the corrugated board 14 shown in FIG. 7, a pair of perforations 132b and 132b extending parallel to the crease line 43 are formed in the center, both ends on the front plate 21 side are connected by the cut line 132a, and both ends on the back plate 22 side. Are connected by a fold line 133. Further, a semicircular opening 136 is formed in the central portion of the cut line 132a in a direction away from the tubular body forming portion 128.

According to the tubular body forming portion 128, the periphery thereof can be adhered to the bottom flap 24a or the like, so that the strength of the packaging box 1 can be further increased.

In the packaging box of the second embodiment described above, the case where the bottom flap 123a and the bottom flap 24a are adhered with an adhesive in mind has been described as an example, but the bottom flap 123a is fixed to the bottom flap 24a. Since it is sufficient, the adhesive tape may be attached, and for example, the adhesive tape may be attached from the first side surface plate 23 to the second side surface plate 24 through the bottom flap 123a.

Further, although the case where the bottom surface flap 123a is adhered to the bottom surface flap 24a has been described as an example, the bottom surface flap 123a may be adhered to other bottom surface flaps 121a and 122a.

1 ... packaging box, 3 ... body, 5 ... bottom lid, 21 ... front plate, 22 ... back plate, 23 ... first side plate, 24 ... second side plate, 21a, 22a, 23a, 24a ... bottom flap, 28 ... Cylindrical body forming part, P ... Cylindrical body.

Claims (7)

A packaging box that houses a bag with a spout for pouring liquid.
A front plate capable of forming a holding hole for penetrating and holding the spout of the bag body,
The back plate facing the front plate and
A first side plate and a second side plate that connect the front plate and the back plate to form a body portion, and
The front plate, the back plate, the first side plate, and the flaps connected to the second side plate, respectively.
It is provided with a bottom lid made of a laminated body of each flap in which flaps connected to the back plate are polymerized on the outermost layer.
The flaps connected to the back plate are provided at intervals between the tip edge and the proximal edge without intersecting a plurality of crease lines extending along the proximal edge and connecting the both end edges. A packaging box characterized by that. In the packaging box according to claim 1, the flap connected to the back plate has a claw portion on the tip edge, and the claw portion can be inserted at a predetermined position on the side close to the base end edge. A packaging box characterized by having an insertion slot forming portion. In the packaging box according to claim 1 or 2, the flap connected to the back plate is a first crease line extending along the proximal edge between the distal edge and the proximal edge and connecting both end edges. A second fold line extending along the proximal edge between the first fold line and the proximal edge and connecting both end edges is provided, and the tip edge, the first fold line, and the second fold line are formed. Parallel to the base end edge, the first fold line and the second fold line are bent to superimpose the outer surface on the tip end side of the first fold line on the outer surface of another flap forming the bottom lid. A packaging box characterized by being able to form a triangular tubular body. In the packaging box according to claim 3, the flap connected to the back plate has a distance from the tip edge to the second fold line larger than the distance from the base end edge to the second fold line. A packaging box characterized by that. In the packaging box according to claim 3 or 4, the square of the distance from the base edge to the second fold line is the square of the distance from the second fold line to the first fold line and the first fold. A packaging box characterized by being equal to or greater than the sum of the square of the distance from the line of sight to the tip edge. In the packaging box according to any one of claims 1 to 5, the flap connected to the back plate is connected to the tip edge via a breakable line, and is outside the other flap forming the bottom lid. A packaging box characterized by having an adhesive portion that is adhered to the side surface. A packaging box that houses a bag with a spout for pouring liquid.
A front plate capable of forming a holding hole for penetrating and holding the spout of the bag body,
The back plate facing the front plate and
A first side plate and a second side plate that connect the front plate and the back plate to form a body portion, and
The front plate, the back plate, the first side plate, and the flaps connected to the second side plate, respectively.
The first side plate or the bottom lid made of a laminated body of each flap obtained by polymerizing the second side plate on the outermost layer is provided.
The flap polymerized on the outermost layer is a breakable line extending from a first position separated from the edge on the back plate side by a predetermined distance to the edge on the front plate side of the flap, or the first. It has a breakable line that connects a second position separated from the edge of the back plate side by a predetermined distance from the position of the above position and extends convexly toward the front plate side.
The swinging tongue piece formed on the flap polymerized on the outermost layer by breaking the breakable line connects the end edge on the first side surface plate side and the end edge on the second side surface plate side. A packaging box characterized in that a plurality of crease lines are provided at intervals without intersecting each other.

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