JP2019099247A - Packing container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container which stably supports a rear portion of a bag-in-box while making the entire bag-in-box inclined so that the front portion of the bag-in-box having a spout is lowered. SOLUTION: This is a packaging container 1 for packaging a bag body 2 having a spout 21 for pouring a liquid, and a front plate 11 capable of forming a holding hole 111 for penetrating and holding the spout 21. , The back plate 12 arranged at a position facing the front plate 11, the right side plate 13 and the left side plate 14 that connect the front plate 11 and the back plate 12 to form a strip-shaped body, and a plurality of bottom flaps. It has at least a bottom lid 15 formed by overlapping the bottom lids 15, and the bottom lid 15 is formed with a convex body M including the bottom side in parallel with the bottom side of the back plate 12. Settled. [Selection diagram] Fig. 1

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a packaging container, and more particularly to a packaging container having an improved function of reducing the unpouring of liquid sealed in an inner bag of a bag-in-box (also referred to as a bag-in-carton).

  The bag-in-box is capable of enclosing a liquid such as a liquid beverage, liquid cosmetic, liquid medicine, etc., and an inner bag having a spout for pouring out the sealed liquid, and the outer bag housed and held in an outer shape It is a box composed of an exterior box. If the liquid continues to be poured out from the outlet of the bag-in-box, the liquid will eventually come out of the outlet. At this time, due to the structure of the inner bag, a fixed amount of liquid remains in the inner bag as unpoured. In some cases, the amount of liquid remaining may be large, and in some cases, 20% or more of the amount of liquid initially enclosed may remain.

  In order to reduce the amount of liquid remaining in the inner bag, for example, in Patent Document 1, a part of the bottom surface of the bag-in-box opposite to the pouring outlet side is flipped up and a part thereof is bent to form a convex body A method is proposed in which the back of the bag-in-box is raised and the bag-in-box is inclined toward the outlet side by forming.

JP, 2009-298450, A

  In the method proposed in Patent Document 1, one corner of the flap constituting the bottom of the bag is flipped up, and the folded up portion is bent to form a convex body, so that the top of the convex body is formed. The formed line is formed obliquely to the bottom of the bag-in-box. The rear part of the bag-in-box is supported by the top of the formed convex body, so that the convex body is formed with the top of the convex-body in order to stably support the rear part of the bag-in-box. It is preferable that the entire line is stably grounded.

  However, the line formed at the top of the convex body is formed obliquely with respect to the bottom of the bag-in-box, and therefore, in order to ground the entire line, the user side is required when bending the raised part. You have to adjust the bending angle at. If this adjustment is not successful, the back of the bag-in-box can not be supported by the entire line and will be supported at a point, so that the back of the bag-in-box can not be stably supported. There is a problem of

  The present invention has been made to solve the above-mentioned problems, and its object is to make the entire bag-in-box inclined while making the front part of the bag-in-box having the outlet lower. An object of the present invention is to provide a packaging container which stably supports the rear portion of a box.

(1) A packaging container according to the present invention is a packaging container for packaging a bag body having a spout for dispensing liquid,
The front plate which can form the holding hole which penetrates and holds the said pouring outlet, the back plate arranged in the position which counters the front plate, the front plate and the back plate are connected, and the belt-like trunk is connected. Right side plate and left side plate forming the front portion, front plate connection bottom flap connected to the bottom side of the front plate, back plate connection bottom flap connected to the bottom side of the back plate, and bottom side of the right side plate A plurality of bottom flaps comprising a right side plate connection bottom flap and a left side plate connection bottom flap connected to the bottom side of the left side plate, each having at least a bottom lid formed by being folded at each connection portion;
The bottom cover is characterized in that a convex body including the bottom side is formed in parallel with the bottom side of the back plate.

  According to the present invention, the bottom cover is formed with a convex body including the bottom side parallel to the bottom side of the back plate. In such a packaging container, the liquid is continuously poured out from the outlet of the bag body, and when the liquid becomes unlikely to come out from the outlet eventually, a convex body is formed on the bottom lid, and the bottom lid is down and the packaging container is grounded. Then, the rear portion of the packaging container is lifted by the height of the convex body, and the state is maintained. For this reason, the liquid remaining in the bag in the packaging container naturally gathers on the side of the front plate having the spout by gravity, and it becomes easy to pour out from the spout. As a result, the amount of liquid remaining in the bag can be reduced.

(2) In the packaging container according to the present invention, the connection portion between the back plate and the back plate connection bottom flap has a first bending curve serving as a base line for bending the back plate connection bottom flap, the back plate connection The central portion of the bottom flap or the vicinity thereof has a second fold curve serving as a base line for folding the back plate connection bottom flap in parallel with the first fold curve, and the back plate of the left side plate connection bottom flap The third side is a notch having a smaller area than the back plate connection bottom flap, a slit forming a part of the locking piece, and a base line for bending the locking piece in parallel to the first folding line. Have a fold and
The locking piece is bent outward with the third fold line as a base line, and an acute angle portion is formed between the right side plate connection bottom flap and the locking piece, and the back of the second fold line is formed as a base line. When the face plate connection bottom flap is folded in two, the tip of the back plate connection bottom flap abuts on the acute angle portion to form the convex body having the second folding curve as the top.

  According to the present invention, the back plate is formed at the acute angle portion formed between the right side plate connection bottom flap and the locking piece in a state where the back plate connection bottom flap is bent in two with the second fold line as a base line. The tip of the connection bottom flap abuts to form a convex body with the second fold line at the top. When the packaging container is grounded with the bottom lid having the convex body down, the rear part of the packaging container is lifted by the height of the convex body, and the state is maintained. For this reason, the liquid remaining in the bag in the packaging container naturally gathers on the side of the front plate having the spout by gravity, and it becomes easy to pour out from the spout. As a result, the amount of liquid remaining in the bag can be reduced.

(3) In the packaging container according to the present invention, the length of the front plate connection bottom flap is equal to or less than the length of the right side plate connection bottom flap and the left side plate connection bottom flap, and the back plate connection bottom The length of the flap is longer than the difference between the length of the front plate connection bottom flap and the length of the right side plate connection bottom flap and the left side plate connection bottom flap,
The connecting portion between the back plate and the back plate connection bottom flap has a first bending curve serving as a base line for bending the back plate connection bottom flap, and the central portion of the back plate connection bottom flap or the vicinity thereof is A second fold curve serving as a base line for folding the back plate connection bottom flap in two parallel to the first fold curve is provided, and the tip side of the front plate connection bottom flap is parallel to the first fold curve. It has a third folding curve that serves as a base line that bends the tip of the front plate connection bottom flap to form a locking piece,
The locking piece is formed by bending the front end of the front plate connection bottom flap outward with the third fold line as a base line, and the front plate connection bottom flap and the bottom flap disposed below the front plate connection bottom flap An acute angle portion is formed between the two, and a tip end portion of the back plate connection bottom flap abuts on the acute angle portion in a state where the back plate connection bottom flap is bent in two with the second bending line as a base line. The convex body having the second fold line at the top is formed.

  According to the present invention, the locking piece is bent outward with the third fold line as the base line, and an acute angle portion is formed between the front plate connection bottom flap and the bottom flap disposed therebelow. With the back plate connection bottom flap folded in two with the second fold line as a base line, the tip of the back plate connection bottom flap abuts the acute angle portion, forming a convex body with the second fold curve as the top Be done. In this state, when the packaging container is grounded with the bottom lid down, the rear part of the packaging container is lifted by the height of the convex body, and the state is maintained. For this reason, the liquid remaining in the bag in the packaging container naturally gathers on the side of the front plate having the spout by gravity, and it becomes easy to pour out from the spout. As a result, the amount of liquid remaining in the bag can be reduced.

  (4) In the packaging container according to the present invention, the back plate connection bottom flap is adhered to the bottom flap forming the locking piece in a state where it can not be bent with the second folding curve as a base line. It can be configured as

  According to the present invention, since the back plate connection bottom flap is bonded to the bottom flap forming the locking piece in a state not to be bent with the second folding line as the base line, the convex body is formed by bending. In the previous step, the shape of the contact surface of the bottom lid can be made flat or nearly so. Then, when it becomes necessary to raise the rear part of the packaging container, the back plate connection bottom flap can be peeled off from the left side plate connection bottom flap or the front plate connection bottom flap to form a convex body. As a result, it is possible to prevent the presence of the back plate connection bottom flap from being disturbed during transportation of the packaging container or at a stage where it is not necessary to tilt the packaging container yet.

(5) In the packaging container according to the present invention, the connection portion between the back plate connection bottom flap and the back plate has a first bending curve as a base line for bending the back plate connection bottom flap, and the back plate connection The right side plate side and the left side plate side of the bottom flap each have a notch forming an insertion piece and a locking piece connected to the tip of the insertion piece, and the central portion of the insertion piece or The vicinity thereof has a second bending line parallel to the first bending line, and the rear plate side end of the right side plate connection bottom flap has a width wider than the width of the insertion piece, The rear plate side of the left side plate connection bottom flap has a notch forming an insertion hole narrower than the width, the slit forming a part of the bent piece, and the slit parallel to the first bending curve. And a third fold line serving as a base line for folding the folded piece;
The bent piece is bent outward with the third bent line as a base line, and the insertion piece disposed in the insertion hole becomes visible, and the locking piece is bent while the second bent line is bent. The convex body is formed by pulling out the insertion piece until it is caught by the hook of the insertion hole.

  According to the present invention, the bent piece is bent outward with the third bent line as a base line, and the insertion piece disposed in the insertion hole becomes visible, and the locking piece is bent while the second bent line is bent. The convex body is formed by pulling out the insertion piece until it is caught by the hook of the insertion hole. Then, put a finger in the lead-out hole optionally provided in the central portion of the insertion piece or in the vicinity thereof, and make the insertion piece mountain-fold while pulling out the insertion piece until the locking piece is caught by the hook of the insertion hole A convex body can be formed. As a result, when the packaging container is grounded with the bottom lid down, the rear part of the packaging container is lifted by the height of the convex body, and the state is maintained. For this reason, the liquid remaining in the bag in the packaging container naturally gathers on the side of the front plate having the spout by gravity, and it becomes easy to pour out from the spout. As a result, the amount of liquid remaining in the bag can be reduced.

(6) In the packaging container according to the present invention, the connection portion between the back plate connection bottom flap and the back plate has a first bending curve serving as a base line for bending the back plate connection bottom flap, the back plate connection The tip end portion of the bottom surface flap has a first meshing portion, and the back plate side of the left side surface plate connection bottom surface flap has a slit forming a part of a bent piece, and the fold parallel to the first fold curve And a third bending curve serving as a base line for bending the bending piece, and a tip end portion of the bending piece has a second meshing portion meshing with the first meshing portion,
The bent piece is bent outward with the third bending line as a base line, and the first meshing portion is bent outward with the first bending line as a base line, thereby the first meshing portion and the second meshing portion The convex body is formed by meshing with the.

  According to the present invention, the bent piece is bent outward with the third bending line as the base line, and the first meshing portion is bent outward with the first bending line as the base line, and the first meshing portion and the second meshing portion A convex body is formed by meshing with. As a result, when the packaging container is grounded with the bottom lid down, the rear part of the packaging container is lifted by the height of the convex body, and the state is maintained. For this reason, the liquid remaining in the bag in the packaging container naturally gathers on the side of the front plate having the spout by gravity, and it becomes easy to pour out from the spout. As a result, the amount of liquid remaining in the bag can be reduced.

(7) In the packaging container according to the present invention, the right side plate, the left side plate, and the back plate have a cutting line for forming a triangular prism-shaped notch piece at a bottom side corner portion on the back plate side. The back plate side of the right side plate connection bottom flap and the back plate side of the left side plate connection bottom flap have a bending curve,
The convex body is formed by cutting the cut line and raising the notch piece with the folding line as a base line.

  According to the present invention, since the convex body is formed by cutting the cutting line and raising the notch piece with the fold line as the base line, when the bottom lid is turned down and the packaging container is grounded, the rear portion of the packaging container Is raised by the height of the convex body, and the state is maintained. For this reason, the liquid remaining in the bag in the packaging container naturally gathers on the side of the front plate having the spout by gravity, and it becomes easy to pour out from the spout. As a result, the amount of liquid remaining in the bag can be reduced.

  (8) In the packaging container according to the present invention, the bag body is an inner bag constituting a bag-in-box, and the packaging container is an exterior box constituting the bag-in-box.

  According to the present invention, there is provided a packaging container which stably supports the rear portion of the bag-in-box while making the entire bag-in-box inclined so that the rear portion of the bag-in-box having the spout is high. Can.

It is an expanded view which shows an example (1st Embodiment) of the packaging container concerning this invention. It is an external appearance perspective view of the bag-in-box containing the packaging container of FIG. FIG. 2 is a perspective view showing a state after the packaging container shown in the developed view of FIG. 1 is assembled, the top and bottom of the packaging container are reversed so that the bottom lid faces upward, and a convex body is formed on the bottom lid. . It is the figure which compared the state before and behind forming a convex body in a bottom cover about the assembled packaging container of FIG. (A) is a left side view showing a state before forming a convex body on the bottom lid, (B) is a left side view showing a state after forming a convex body on the bottom lid. It is an example of the expanded view of an example (2nd Embodiment) other than the expanded view of FIG. It is an expanded view which shows another example (3rd Embodiment) of the packaging container concerning this invention. FIG. 7 is a perspective view showing a state after the packaging container shown in the developed view of FIG. 6 is assembled, the top and bottom of the packaging container are reversed so that the bottom lid faces upward, and a convex body is formed on the bottom lid. . It is an expanded view which shows another example (4th Embodiment) of the packaging container concerning this invention. FIG. 9 is a perspective view showing a state after the packaging container shown in the developed view of FIG. 8 is assembled, the top and bottom of the packaging container are reversed so that the bottom lid faces upward, and a convex body is formed on the bottom lid. . It is an expanded view which shows another example (5th Embodiment) of the packaging container concerning this invention. FIG. 11 is a perspective view showing a state after the packaging container shown in the developed view of FIG. 10 is assembled, the top and bottom of the packaging container are reversed so that the bottom lid faces upward, and a convex body is formed on the bottom lid. .

  A packaging container according to the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments. In the following description, first, the basic configuration (basic embodiment) of the packaging container according to the present invention and its respective elements will be described, and then the characteristic points of the packaging container of the first to fifth embodiments will be described. The description of the common components is simplified, and the characteristic components are mainly described. In the packaging container 1 according to the present invention, as shown in FIGS. 1, 5, 6, 8 and 10, a bending curve, a slit and the like are provided in each part of one plate-like (sheet-like) member to bend each part It is also possible to assemble by cutting, but it is not limited to this. A plurality of members constituting the packaging container 1 may be connected and assembled.

[Basic configuration of packaging container]
The packaging container 1 which concerns on this invention is used, for example in order to package and hold | maintain the external shape of the bag body which has a pouring outlet which pours out liquids, such as enclosed liquid beverage, liquid cosmetics, and liquid medicine. The basic configuration is, as shown in FIGS. 1 to 11, a packaging container for packaging a bag body 2 having a spout 21 for spouting a liquid, which penetrates and holds the spout 21. A front plate 11 capable of forming the holding hole 111, a back plate 12 disposed at a position facing the front plate 11, a right side plate connecting the front plate 11 and the back plate 12 to form a band-like trunk portion 13 and the left side plate 14, and the bottom lid 15 formed by the plurality of bottom flaps 151 to 154 being bent and overlapped at each connecting portion.

  The feature of the present invention is that the bottom lid 15 is formed with a convex body M including the bottom side parallel to the bottom side of the back plate 12. Since the convex body M including the bottom side of the back plate 12 is formed, when the packaging container 1 is grounded with the bottom lid down, the rear portion of the packaging container 1 is lifted by the height of the convex body, The state is maintained. For this reason, the liquid remaining in the bag in the packaging container naturally gathers on the side of the front plate having the spout by gravity, and it becomes easy to pour out from the spout 21. As a result, the amount of liquid remaining in the bag can be reduced.

  In addition, "at least" is because it has the upper cover 16 normally formed by the upper surface flaps 161-164 overlapping. The bottom flaps 151 to 154 are a front plate connection bottom flap 153 connected to the bottom side of the front plate 11, a back plate connection bottom flap 151 connected to the bottom side of the back plate 12, and a right side connected to the bottom side of the right side plate 13. They are the left side plate connection bottom flap 152 connected to the bottom side of the face plate connection bottom flap 154 and the left side plate 14. The upper surface flaps 161 to 164 are a front surface plate connection upper surface flap 163 connected to the upper surface of the front surface plate 11, a rear surface connection upper surface flap 161 connected to the upper side of the rear surface plate 12, and a right side connected to the upper side of the right side surface plate 13. They are a left side plate connection upper surface flap 162 connected to the upper side of the face plate connection upper surface flap 164 and the left side surface plate 14. The packaging container 1 is a rectangular parallelepiped or cubic outer box formed by assembling them. The top flaps do not necessarily have to be made up of four. As long as the upper lid 16 can be formed, it can be configured by one or more arbitrary number. The bottom flaps also do not necessarily have to be made up of four. The convex body M can be configured with the minimum number of sheets that can be formed.

  Hereinafter, each element of the basic configuration will be described in detail.

(Front plate)
The front plate 11 is a plate-like body which penetrates and holds the spout 21 as shown in FIG. 1, FIG. 5, FIG. 6, FIG. 8 and FIG. The front plate 11 is connected to a front plate connection bottom flap 153 (also simply referred to as a bottom flap 153), the right side plate 13, the left side plate 14, and the top flap 163. A bending line 11 a is provided at a connecting portion between the front plate 11 and the front plate connecting bottom flap 153. A bending line 11 b is provided at a connecting portion between the front plate 11 and the right side plate 13. A bending line 11 c is provided at a connecting portion between the front plate 11 and the left side plate 14. A folding line 11 d is provided at a connecting portion between the front plate 11 and the upper surface flap 163. The front plate 11 has a perforation 111a in the form of a holding hole 111 for penetrating and holding the spout 21 of the bag 2 and a spout 21 for facilitating and penetrating the spout 21 of the bag 2 There are provided perforations 112a, 112b in the form of holding pieces 112 for holding and folding lines 112c for bending the holding pieces 112.

  When the user pulls out the pouring spout 21 from the inside of the packaging container 1 to the outside for use, the user performs the work according to the following procedure. That is, (1) The circular portion partitioned by the perforations 111a is strongly pressed with a finger or the like and cut out. Thereby, the holding holes 111 are formed on the front plate 11. (2) While cutting out the perforations 112a and 112b in the form of the holding piece 112, the holding piece 112 is turned up to the front with the folding line 112c as a base line. Thus, a space for drawing the spout 21 to the outside is formed on the front plate 11. (3) Draw the spout 21 out of the packaging container 1 and fit the circular groove (not shown) provided at the base of the spout 21 and the weir of the holding hole 111. (4) The holding piece 112 in the turned-up state is returned to the original position, and the semicircular or substantially semicircular weir of the tip of the holding piece 112 is provided in the base of the spout 21 Fit in the groove of the Thereby, the spout 21 can be fixed on the front plate 11.

(Back plate)
The back plate 12 is a plate-like body disposed at a position facing the front plate 11 as shown in FIGS. 1, 5, 6, 8 and 10. A back plate connection bottom flap 151 (also referred to simply as the bottom flap 151), the left side plate 14 and the top flap 161 are connected to the back plate 12, respectively. A bending line 12 a is provided at a connecting portion of the back plate 12 and the bottom flap 151. A bending line 12 b is provided at a connecting portion between the back plate 12 and the left side plate 14. A bending line 12 c is provided at a connecting portion between the back plate 12 and the upper surface flap 161. A glue strip 121 is further connected to the back plate 12. A folding line 12 d is provided at a connection portion between the back plate 12 and the glue strip 121. The glue strip piece 121 is bent with the fold line 12d as a base line, and is adhered to the inner surface of the right side plate 13, thereby integrally fixing the band-shaped body portion in a tubular shape. Thus, a tubular body is formed.

(Right side plate)
The right side surface plate 13 is a plate-like body disposed at a position facing the left side surface plate 14 as shown in FIGS. 1, 5, 6, 8 and 10, and together with the left side surface plate 14, the front side plate 11 and the back The face plate 12 is connected to form a band-like body. A front plate 11, a right side plate connection bottom flap 154 (also simply referred to as a bottom flap 154), and a top flap 164 are connected to the right side plate 13, respectively. A bending line 11 b is provided at a connecting portion between the right side plate 13 and the front plate 11. A bending line 13 a is provided at a connecting portion between the right side plate 13 and the bottom flap 154. A bending line 13 b is provided at a connecting portion between the right side plate 13 and the upper surface flap 164.

(Left side plate)
The left side surface plate 14 is a plate-like body disposed at a position facing the right side surface plate 13 as shown in FIGS. 1, 5, 6, 8 and 10, and together with the right side surface plate 13, the front side plate 11 and the back The face plate 12 is connected to form a band-like body. A front plate 11, a back plate 12, a left side plate connection bottom flap 152 (also simply referred to as a bottom flap 152), and a top flap 162 are connected to the left side plate 14, respectively. A bending line 11 c is provided at a connecting portion between the left side plate 14 and the front plate 11. A bending line 12 b is provided at the connecting portion between the left side plate 14 and the back plate 12. A bent line 14 a is provided at the connecting portion between the left side plate 14 and the bottom flap 152. A bent line 14 b is provided at a connecting portion between the left side plate 14 and the upper surface flap 162.

(Bottom lid)
The bottom cover 15 is a plate-like body formed by overlapping a plurality of bottom flaps 151 to 154 as shown in FIGS. 1, 5, 6, 8 and 10, and the bottom portion of the packaging container 1 Configure. The bottom cover 15 has a front plate connection bottom flap 153, a right side plate connection bottom flap 154, a left side plate connection bottom flap 152, and a back plate connection, with the fold lines respectively provided at the connecting portions with the bottom flaps 151 to 154 as base lines. The bottom flaps 151 are formed by being folded and overlapped in order. The order in which the front plate connection bottom flap 153 and the right side plate connection bottom flap 154 are bent is not limited to the above order, and may be reversed. The front plate connection bottom flap 153 is a bottom flap connected to the front plate 11, and the connecting portion with the front plate 11 is provided with a folding line 11 a. The back plate connection bottom flap 151 is a bottom flap connected to the back plate 12, and a connecting portion with the back plate 12 is provided with a folding curve 12a. The right side plate connection bottom flap 154 is a bottom flap connected to the right side plate 13, and a connecting portion with the right side plate 13 is provided with a bending curve 13 a. The left side plate connection bottom flap 152 is a bottom flap connected to the left side plate 14, and a connecting portion with the left side plate 14 is provided with a bending curve 14 a.

  In the present invention, the bottom lid 15 is formed with a convex body M including the bottom side parallel to the bottom side of the back plate 12. The convex body M including the bottom side of the back plate 12 is formed by bending at least two of the plurality of bottom flaps 151 to 154 (one of which is the back plate connection bottom flap 151). . As a specific embodiment, the 1st-5th embodiment mentioned later can be mentioned, and it explains in detail in the explanation column.

(Upper lid)
As shown in FIG. 1, FIG. 5, FIG. 6, FIG. 8 and FIG. 10, the upper lid 16 is formed by folding the upper surface flaps 161 to 164 with the folding line provided at each connecting portion as a base line. It is an upper lid to be The upper lid 16 is provided with a handle hole 160 for exposing the handle to the outside of the packaging container 1 when the bag body 2 including the handle (not shown) is packaged.

  The back plate connection upper surface flap 161 is an upper surface flap connected to the back plate 12, and a connecting portion with the back plate 12 is provided with a bending curve 12 c. The back plate connection upper surface flap 161 is provided with a notch 161 a that forms a part of the handle hole 160. The front plate connection upper surface flap 163 is an upper surface flap connected to the front plate 11, and a connecting portion with the front plate 11 is provided with a folding curve 11d. The front plate connection upper surface flap 163 is provided with a notch portion 163 a which forms a part of the handle hole 160. The left side plate connection upper surface flap 162 is an upper surface flap connected to the left side surface plate 14, and a connecting portion with the left side surface plate 14 is provided with a bending curve 14 b. The left side plate connection upper surface flap 162 is provided with a notch portion 162 a which forms a part of the handle hole 160. Further, the right side plate connection upper surface flap 164 is an upper surface flap connected to the right side surface plate 13, and a bent line 13 b is provided at a connecting portion with the right side surface plate 13. The right side plate connection upper surface flap 164 is provided with a slit 164 a and a folding line 164 b for forming a notch forming a part of the handle hole 160.

(Assembly procedure)
As described above, after the body portion is formed by the glue strip 121, the bottom lid 15 and the top lid 16 are formed in the following procedure. However, the procedure for assembling the packaging container 1 is not particularly limited, and the following procedure is a preferred example. That is, (1) The front plate connection bottom flap 153 is bent inward with the folding line 11a as a base line. (2) The right side plate connection bottom flap 154 is bent inward with the folding line 13a as a base line. (3) The left side plate connection bottom flap 152 is bent inward with the fold line 14 a as a base line, and partially adhered to the right side plate connection bottom flap 154. (4) With the folding line 12 a as a base line, the back plate connection bottom flap 151 is bent inward and partially adhered to the left side plate connection bottom flap 152. Thus, the bottom lid 15 is formed, and at this stage, the bag body 2 is housed in the packaging container 1. (5) The front plate connecting upper surface flap 163 is bent inward with the folding line 11d as a base line. (6) The back plate connection upper surface flap 161 is bent inward with the folding line 12c as a base line. (7) The right side plate connection upper surface flap 164 is bent inward with the folding line 13b as a base line. (8) With the fold line 14b as a base line, the left side plate connection upper surface flap 162 is bent inward and partially adhered to the right side plate connection upper surface flap 164. Thereby, the upper lid 16 is formed. The order of (5) and (6) may be reversed, and the order of (7) and (8) may be reversed.

(Procedure for forming convex body)
When the volume of the liquid sealed in the bag body 2 decreases with use, a sufficient amount of liquid will not come out from the spout 21. In particular, when the liquid level of the liquid sealed in the bag body 2 and the spout 21 have the same height, the liquid does not come out of the spout 21. In such a case, the user can form the convex body M according to the procedure described in detail in the following description of the first to fifth embodiments.

(Material of packaging container)
As a material of the packaging container 1, although it is preferable to use paper products (paper products, such as corrugated cardboard), it is not limited to paper products (cardboard). For example, a resin that is easy to process may be used. When the resin is used, the packaging container 1 can be manufactured utilizing the characteristics of the resin. As a result, it is possible to manufacture a plurality of types of packaging containers 1 having different properties and appearances.

(Size of packaging container)
The size of the packaging container 1 is not particularly limited, but when drinking water and the like used in general homes are sealed in the bag body 2, the length of the vertical and horizontal depth of the packaging container 1 is about several tens of centimeters respectively Is preferred.

First to fifth embodiments
Since the basic configuration of the packaging container 1 is as described above, in the following first to fifth embodiments, the description of the same configuration as the above basic configuration is omitted, and each characteristic component explain.

  The characteristic configuration of the packaging container 1 according to the present invention is that the convexity M including the bottom side is formed in the bottom cover 15 in parallel with the bottom side of the back plate 12. With such a characteristic configuration, when the packaging container 1 is grounded with the bottom lid down, the rear portion of the packaging container 1 is lifted by the height of the convex body, and the state is maintained. For this reason, the liquid remaining in the bag in the packaging container naturally gathers on the side of the front plate having the spout by gravity, and it becomes easy to pour out from the spout 21. As a result, the amount of liquid remaining in the bag can be reduced.

  Below, each form of convex body M formed in bottom lid 15 is explained by the following 1st-a 5th embodiment.

First Embodiment
In the first embodiment, as shown in FIGS. 1 to 3, the connection portion between the back plate 12 and the back plate connection bottom flap 151 has a first bending curve 12 a that serves as a base line for bending the back plate connection bottom flap 151. doing. A central portion of the back plate connection bottom flap 151 or its vicinity has a second fold line 151a which becomes a base line which can fold the back plate connection bottom flap 151 into two in a mountain fold parallel to the first fold line 12a. ing. The back plate side of the left side plate connection bottom flap 152 is parallel to the notch H having a smaller area than the back plate connection bottom flap 151, the slit S forming a part of the locking piece I, and the first bending curve 12a. And a third bending curve which is a base line for bending the locking piece I.

  A feature of the first embodiment is that the locking piece I is bent outward with the third folding line 152a as a base line to form an acute-angled portion between the left side plate connection bottom flap 152 and the right side plate connection bottom flap 154. Be done. Then, in a state in which the back plate connection bottom flap 151 is bent in two with the second fold line 151a as a base line, the tip E of the back plate connection bottom flap 151 abuts on the acute angle portion thereof, The convex body M to be the top is to be formed.

  The top of the convex body M (folding line 151a) is parallel to the folding line 12a and perpendicular to the folding line 14a. For this reason, the entire top (folding curve 151a) of the convex body M can be grounded without adjusting the position and direction of the bending portion on the user side. As a result, the rear portion of the packaging container 1 can be stably held. In addition, the shape of the convex body M is not limited to a triangular prism shape as shown in FIG. For example, it may have a polygonal prism shape such as a quadrangular prism having a larger number of apexes than a triangular prism, or may have a semicircular shape.

  The left side plate connection bottom flap 152 is a bottom flap connected to the left side plate 14, and a connecting portion with the left side plate 14 is provided with a bending curve 14 a. A bending curve 152 a, a notch S, and a notch H are provided on the back plate 12 side of the left side plate connection bottom flap 152. The locking piece I is formed by valley-folding the region provided with the incised portion S with the folding line 152a as a base line. As shown in FIG. 3, the tip E of the back plate connection bottom flap 151 abuts on the acute angle portion of the right side plate connection bottom flap 154 and the hooking piece I. The angle of the acute angle formed by the locking piece I and the right side plate connection bottom flap 154 is not particularly limited, but may be, for example, about 45 ° as shown in FIG. It may be about °. Further, the angle of the top portion (folding curve 151a) of the convex body M is not particularly limited, but may be, for example, 90 ° or an angle (for example, 60 to 120 °) in the vicinity thereof.

  The left side plate connection bottom flap 152 and the right side plate connection bottom flap 154 are preferably bonded at or near the fold line 152a, so the tip E of the back plate connection bottom flap 151 is at its acute angle. There is no fear that the convex body M will be deformed or crushed deeply.

(Procedure for forming convex body)
When the volume of the liquid sealed in the bag body 2 decreases with use, a sufficient amount of liquid will not come out from the spout 21. In particular, when the liquid level of the liquid sealed in the bag body 2 and the spout 21 have the same height, the liquid does not come out of the spout 21. In such a case, the user (1) reverses the top and bottom of the packaging container 1 and peels off the back plate connection bottom flap 151 bonded to the left side plate connection bottom flap 152. (2) A valley-folded locking piece I is formed with the folding line 152a as a base line. (3) The central portion or the vicinity thereof of the back plate connecting bottom flap 151 is mountain-folded with the folding line 151a as a base line. (4) The front end E of the back plate connection bottom flap 151 abuts on the acute angle portion of the locking piece I and the right side plate connection bottom flap 154. Thereby, the convex body M is formed. In addition, the procedure of assembling the convex body M is not specifically limited, The said procedure is a suitable example.

Second Embodiment
The basic technology of the packaging container 1 of the second embodiment is the same principle as the packaging container of the first embodiment, but the shape of the bottom flap is changed as shown in FIG. That is, the length of the front plate connection bottom flap 153 is equal to or less than the length of the right side plate connection bottom flap 154 and the left side plate connection bottom flap 152. The length of the back plate connection bottom flap 151 is longer than the difference between the length of the front plate connection bottom flap 153 and the lengths of the right side plate connection bottom flap 154 and the left side plate connection bottom flap 152.

  The bottom cover 15 configured by the bottom flaps of such a length has the front plate connection bottom flap 153 and the back plate connection bottom flap 151 after the right side plate connection bottom flap 154 and the left side plate connection bottom flap 152 are folded and overlapped. It is formed by folding in order of and overlapping. At this time, a connecting portion between the back plate 12 and the back plate connection bottom flap 151 has a first bending curve 12 a which becomes a base line for bending the back plate connection bottom flap 151. A central portion of the back plate connection bottom flap 151 or its vicinity has a second fold line 151a which becomes a base line which can fold the back plate connection bottom flap 151 into two in a mountain fold parallel to the first fold line 12a. ing. On the tip side of the front plate connection bottom flap 153, there is provided a third fold curve 153a serving as a base line for bending the tip portion of the front plate connection bottom flap 153 parallel to the second folding line 151a to form the locking piece I There is.

  A feature of the second embodiment is that the locking piece I is formed by bending the tip of the front plate connection bottom flap 153 outward with the third fold line as a base line, and the front plate connection bottom flap 153; An acute-angled portion is formed between the bottom flap disposed therebelow (either the right side plate connection bottom flap 154 or the left side plate connection bottom flap 152). The distal end E of the back plate connection bottom flap 151 abuts on the acute angle portion in a state where the back plate connection bottom flap 151 is bent in two with the second folding line 151 a as a base line. Thus, a convex body M having the second fold line 151a at the top is formed.

  In the second embodiment, the basic technology is the same principle as the packaging container of the first embodiment except that the shape of the bottom flap is different. Therefore, the other configurations (the shape of the convex body M, the adhesion between the bottom flaps, the angle of the acute angle portion, etc.) are the same as in the first embodiment, and thus the description thereof is omitted here.

  When the developed view of the packaging container of the second embodiment is compared with the developed view of the packaging container of the first embodiment, the developed view of the second embodiment shown in FIG. The front plate connecting bottom flap 153 is provided with a third bending curve 153 a and a locking piece I. Therefore, the third fold line 152a and the locking piece I provided on the left side plate connection bottom flap 152 in the developed view shown in FIG. 1 are provided on the left side plate connection bottom flap 152 in the developed view shown in FIG. Not. Further, the developed view shown in FIG. 1 is different from the expanded view shown in FIG. 5 in that the whole developed view fits neatly into one rectangle, while the developed view shown in FIG. .

(Bonding position)
Regarding the bonding position of the bottom flaps in the first embodiment and the second embodiment, for example, the back plate connection bottom flap 151 is not bent with the second folding line 151a as a base line, the left side plate connection bottom flap 152 ( It is adhered to the first embodiment or the front plate connection bottom flap 153 (the second embodiment). By such adhesion, the shape of the ground contact surface of the bottom lid 15 can be made nearly flat. Then, when it is necessary to raise the rear part of the packaging container 1, the back plate connection bottom flap 151 is peeled off from the left side plate connection bottom flap 152 or the front plate connection bottom flap 153 to form the convex body M. Can. As a result, it is possible to prevent the presence of the back plate connection bottom flap 151 from disturbing during transportation of the packaging container 1 or at a stage where the packaging container 1 does not have to be inclined. In addition, the method of adhering the backplate connection bottom flap 151 to the side plate connection bottom flap 152 or the front plate connection bottom flap 153 is not particularly limited, but by adhesive means such as glue or adhesive which can be easily peeled off at the user side. It is preferable that it adheres.

Third Embodiment
The packaging container 1 of the third embodiment is the same in that the bottom lid 15 is formed with a convex body M including the bottom side in parallel with the bottom side of the back plate 12 as shown in FIGS. 6 and 7. Thus, the form of the convex body M is characterized. That is, the connection portion between the back plate connection bottom flap 252 and the back plate 12 has a first fold line 12 a which becomes a base line for bending the back plate connection bottom flap 252. The right side plate side and the left side plate side of the back plate connection bottom flap 252 have notches 252c and 252d that form the insertion piece 273 and the engagement piece 272 connected to the tip of the insertion piece 273 respectively. ing. A central portion of the insertion piece 273 or in the vicinity thereof has a second fold line 252a parallel to the first fold line 12a. The end on the back plate side of the right side plate connection bottom flap 251 has a notch 261 which forms an insertion hole 262 whose width is wider than the width of the insertion piece 273 and narrower than the width of the locking piece 272. . The back plate side of the left side plate connection bottom flap 253 has a slit 253b that forms a part of a bent piece 281 that is bent and erected, and a base line that bends the bent piece 281 in parallel with the first bent curve 12a And a third fold line 253a.

  A feature of the third embodiment is that the insertion piece is bent in such a manner that the bent piece 281 stands obliquely outward with the third bend line 253a as a base line by such a bottom surface flap structure, and is disposed in the insertion hole 273 becomes visible. Then, the insertion piece 273 is pulled out until the locking piece 272 is caught by the hook of the insertion hole 262 while bending the second bending line 252a. At this time, it is preferable that a lead-out hole 252 b is provided at or near the central portion of the back plate connection bottom flap 252, and a finger is inserted into the lead-out hole 252 b, and the locking piece 272 is a ridge of the insertion hole 262. The convex body M can be formed by pulling the insertion piece 273 and making it mountain-folded until it gets caught. When the package lid 1 is grounded with the bottom lid 15 down, the rear part of the package 1 is lifted by the height of the protrusion M and the state is maintained.

  The left side plate connection bottom flap 253 is connected to the left side plate 14, and the connecting portion with the left side plate 14 is provided with a bending curve 14 a. A third bending curve 253 a and a slit 253 b which form a bending piece 281 are provided at an end of the left side plate connection bottom flap 253 on the back plate side. Thus, a space for inserting the insertion piece 273 into the insertion hole 262 can be secured.

  The bent piece 281 of the left side plate connection bottom flap 253 may be bonded to a part of the back plate connection bottom flap 252 with an adhesive in a state where it is not bent with the third bending line 253a as a base line. In this case, the shape of the ground contact surface of the bottom cover 15 can be made nearly flat. Then, when it becomes necessary to raise the rear part of the packaging container 1, the left side plate connection bottom flap 253 is peeled off from the back plate connection bottom flap 252, and thereafter the convex body M is formed as described above. be able to. Although the method of bonding the left side plate connection bottom flap 253 to the back plate connection bottom flap 252 is not particularly limited, it is preferable to use a bonding means such as glue or an adhesive that can be easily peeled off at the user side. .

  Also in the third embodiment, the top (folding line 252a) of the convex body M is parallel to the folding line 12a and perpendicular to the folding line 14a. For this reason, the entire top (folding curve 252a) of the convex body M can be grounded without adjusting the position and direction of the bending portion on the user side. As a result, the rear portion of the packaging container 1 can be stably held. In addition, the shape of the convex body M is not limited to a triangular prism shape as shown in FIG. For example, it may have a polygonal prism shape such as a quadrangular prism having a larger number of apexes than a triangular prism, or may have a semicircular shape.

  The left side plate connection bottom flap 253 is a bottom flap connected to the left side plate 14, and a connecting portion with the left side plate 14 is provided with a folding curve 14 a. A third fold curve 253 a and a slit 253 b are provided on the back plate side of the left side plate connection bottom flap 253. The bent piece 281 including the area provided with the slit 253 b is diagonally folded up with the third bent line 253 a as a base line. As shown in FIG. 7, when the bent piece 281 and one surface of the convex body M are combined, the shape of the convex body M is maintained. The bending angle of the bending piece 281 is not particularly limited, and may be, for example, about 45 ° as shown in FIG. 7, but may be about 15 ° to 60 °. Further, the angle of the top portion (folding curve 151a) of the convex body M is not particularly limited, but may be, for example, 90 ° or an angle (for example, 60 to 120 °) in the vicinity thereof.

(Procedure for forming convex body)
When the volume of the liquid sealed in the bag body 2 decreases with use, a sufficient amount of liquid will not come out from the spout 21. In particular, when the liquid level of the liquid sealed in the bag body 2 and the spout 21 have the same height, the liquid does not come out of the spout 21. In such a case, (1) the user turns the packaging container 1 upside down, and peels off the bent piece 281 if the bent piece 281 is adhered to the back plate connection bottom flap 252. (2) A finger is hooked on the extraction hole 252b, and the insertion piece 273 is extracted. (3) While pulling out the insertion piece 273 until the locking piece 272 catches on the hook of the insertion hole 262, the insertion piece 273 is mountain-folded with the folding line 252a as a base line. Thereby, a convex body M as shown in FIG. 7 is formed. In addition, the procedure of assembling the convex body M is not specifically limited, The said procedure is a suitable example.

Fourth Embodiment
The packaging container 1 of the fourth embodiment is the same in that the bottom lid 15 is formed with a convex body M including the bottom side parallel to the bottom side of the back plate 12, but it is shown in FIGS. Thus, the form of the convex body M is characterized. That is, the connection portion between the back plate connection bottom flap 352 and the back plate 12 has a first bending curve 12 a which becomes a base line for bending the back plate connection bottom flap 352. The tip of the back plate connection bottom flap 352 has a first meshing portion 352 a. The back plate side of the left side plate connecting bottom flap 353 has a slit 353b forming a part of the bending piece 381 and a third bending curve 353a serving as a base line for bending the bending piece 381 in parallel with the first bending curve 12a. The distal end portion of the bending piece 381 has a second meshing portion 353c that meshes with the first meshing portion 352a.

  The characteristic of the fourth embodiment is such that the bent piece 381 is bent so as to stand obliquely outward with the third bent line 353a as a base line by such a bottom surface flap structure. Then, the first meshing portion 352a is bent outward with the first folding line 12a as a base line, and the first meshing portion 352a and the second meshing portion 353c mesh with each other to form the convex body M. When the package lid 1 is grounded with the bottom lid 15 down, the rear part of the package 1 is lifted by the height of the protrusion M and the state is maintained.

  The size of the back plate connection bottom flap 352 is the same as or substantially the same as the size of the insertion hole 362. Therefore, the bottom flap 352 can be inserted horizontally into the insertion hole 362. The bottom flap 353 may be bonded to a part of the bottom flap 352 with an adhesive in a state where it is not bent with the third folding line 353a as a base line. In this case, the shape of the ground contact surface of the bottom cover 15 can be made nearly flat. Then, when the necessity to raise the rear part of the packaging container 1 arises, the left side plate connection bottom flap 353 can be peeled off from the back plate connection bottom flap 352 to form the convex body M. Although the method of bonding the left side plate connection bottom flap 353 to the back plate connection bottom flap 352 is not particularly limited, it is preferable to use a bonding means such as glue or adhesive that can be easily peeled off at the user side. . In the developed view shown in FIG. 8, an insertion hole 362 is formed in the right side plate connection bottom flap. Since the insertion hole 362 is formed, when the bottom flaps 351 to 354 are folded and the packaging container 1 is assembled, the first meshing portion 352 a fits in the insertion hole 362. Thereby, the bottom lid 15 after assembling can be made flat. However, this is not essential, and the back plate connection bottom flap 352 may be folded outside the right side plate connection bottom flap 351 without forming the insertion hole 362.

  Also in the fourth embodiment, the top of the convex body M (the meshing portion between the first meshing portion 352a and the second meshing portion 353c) is parallel to the fold line 12a and perpendicular to the fold line 14a. . Therefore, the entire top of the convex body M can be grounded without adjusting the position and direction of the meshing portion on the user side. As a result, the rear portion of the packaging container 1 can be stably held. In addition, the meshing form which forms the convex-shaped body M is not limited to a triangular-prism shape as shown in FIG.8 and FIG.9. The angle at the top of the meshing portion is not particularly limited, but may be, for example, 90 ° or an angle (for example, 60 to 120 °) or the like as shown in FIG.

(Procedure for forming convex body)
When the volume of the liquid sealed in the bag body 2 decreases with use, a sufficient amount of liquid will not come out from the spout 21. In particular, when the liquid level of the liquid sealed in the bag body 2 and the spout 21 have the same height, the liquid does not come out of the spout 21. In such a case, the user reverses the top and bottom of the packaging container 1 and peels off the bent piece 381 when the bent piece 381 is adhered to the back plate connection bottom flap 352. (2) The bent piece 381 is obliquely raised using the third bent line 353a as a base line. (3) The back plate connecting bottom flap 352 is obliquely raised using the folding line 12a as a base line. (4) The first meshing portion 352 a at the tip of the back plate connection bottom flap 352 and the second meshing portion 353 c at the tip of the bent piece 381 are meshed. Thereby, a convex body M as shown in FIG. 9 is formed. The order of (2) and (3) may be reversed. The procedure for assembling the convex body M is not particularly limited, and the above procedure is a preferred example.

Fifth Embodiment
The packaging container 1 of the fifth embodiment is the same in that the bottom lid 15 is formed in parallel with the bottom side of the back plate 12 with a convex body M including the bottom side, as shown in FIGS. 10 and 11. Thus, the form of the convex body M is characterized. That is, the right side plate 13, the left side plate 14, and the back plate 12 have cut lines 12e, 13c, and 14c that form a triangular prism-shaped notch piece 461 at the bottom corner on the back plate side. The back plate side of the right side plate connection bottom flap 451 and the back plate side of the left side plate connection bottom flap 453 have bending curves 451a and 453a.

  The characteristic of the fifth embodiment resides in that the convex body M is formed by cutting the cut lines 12e, 13c and 14c and raising the notch piece 461 with the fold lines 451a and 453a as a base line by the bottom surface flap structure. . When the package lid 1 is grounded with the bottom lid 15 down, the rear part of the package 1 is lifted by the height of the protrusion M and the state is maintained.

  In addition, the tearing-off line 12e provided in the backplate 12 is provided as a perforation in the corner by the side of the bottom lid 15 and the backplate 12 side. In addition, on the bottom lid 15 side of the adhesive margin piece 121 provided on the back plate 12, a perforation 121a serving as a cutting line is provided. In addition, a tearing line 13c provided on the right side plate 13 is provided as a perforation at a bottom corner on the bottom lid 15 side and the back plate 12 side. Moreover, the perforation 14c provided in the left side plate 14 is provided as a perforation at the corner on the bottom lid 15 side and the back plate 12 side.

  As to the bottom cover 15, as shown in FIG. 10, the end of the right side plate connection bottom flap 451 on the back plate 12 side and the end portion of the left side plate connection bottom flap 453 are folds that allow the notch piece 461 to be pivotable. Curves 451a and 453a are provided respectively.

  The notch piece 461 is cut from the packaging container 1 by cutting the perforation lines (perforations) 13c, 12e, 121a, 14c. The cut-out notch piece 461 is rotated until it contacts the right side plate connection bottom flap 451 and the left side plate connection bottom flap 453 with the folding lines 451a and 453a as a base line. By doing this, a convex body M as shown in FIG. 11 can be formed. In addition, the shape of the convex body M is not limited to a triangular prism shape as shown in FIG. By changing the number of perforations, the position, the direction, and the length, it is possible to form a polygonal prism such as a quadrangular prism having a larger number of apexes than the triangular prism. The cut lines 13c, 12e, 121a, and 14c are not limited to perforations, and may be formed by half cutting or the like.

(Procedure for forming convex body)
When the volume of the liquid sealed in the bag body 2 decreases with use, a sufficient amount of liquid does not come out from the spout 21, and the user causes the convex body M to be formed in the following procedure. In addition, the procedure of assembling the convex body M is not specifically limited, The following procedure is a suitable example. That is, when the volume of the liquid sealed in the bag 2 decreases with use, a sufficient amount of liquid will not come out from the spout 21. In particular, when the liquid level of the liquid sealed in the bag body 2 and the spout 21 have the same height, the liquid does not come out of the spout 21. In such a case, the user (1) reverses the top and bottom of the packaging container 1. (2) Cut lines (perforations) 13c, 12e, 121a, 14c. (3) The notch piece 461 is cut from the packaging container 1. (4) The cut pieces 461 are pivoted to contact the right side plate connection bottom flap 451 and the left side plate connection bottom flap 453 with the folding lines 451a and 453a as base lines. Thereby, a convex body M as shown in FIG. 11 is formed.

  The present invention is not limited to the contents described in the above-described embodiment, but includes other embodiments and usage examples considered within the scope of the matters described in the claims. In addition, various modifications and combinations of the above-described embodiments may be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 packaging container 2 bag 11 front plate 11a-11d bending curve 12 back plate 12a bending curve (1st bending curve)
12b folding line 12c folding line 12d folding line 12e perforation (cutting line)
13 Right side plate 13a, 13b Curved line 13c Perforation (cut line)
14 Left side plate 14a, 14b Curved line 14c Perforation (cut line)
15 bottom lid 16 top lid 21 spout 111 holding hole 111a perforation 112 holding piece 112a, 112b perforation 112c bending curve 121 paste margin 121a perforation (cutting line)
151 Bottom flap (rear plate connection bottom flap)
152 Bottom flap (left side plate connection bottom flap)
153 Bottom flap (front plate connection bottom flap)
154 Bottom flap (right side plate connection bottom flap)
151a folding line (second folding line)
152a Folded Curve (Third Folded Curve)
153a Folded Curve (Third Folded Curve)
161 back plate connection upper surface flap 162 left side plate connection upper surface flap 163 front plate connection upper surface flap 164 right side plate connection upper surface flap 161a cutout portion 162a cutout portion 163a cutout portion 164a slit 164b bending curve 251 bottom surface flap (right side panel connection bottom surface flap )
252 Bottom flap (rear plate connection bottom flap)
253 Bottom flap (left side plate connection bottom flap)
254 Bottom flap (front plate connection bottom flap)
252a folding line (second folding line)
252b Draw-out hole 252c Notched part 252d Notched part 253a Folded curve (third folded curve)
253b Slit 261 Notched part 262 Insertion hole 272 Locking piece 273 Inserting piece 281 Curved piece 351 Bottom flap (right side plate connection bottom flap)
352 bottom flap (rear plate connection bottom flap)
353 Bottom flap (left side plate connection bottom flap)
354 Bottom flap (front plate connection bottom flap)
352a 1st meshing part 353a Folded curve (third folded curve)
353b Slit 353c Second meshing part 361 Notched part 362 Insertion hole 381 Bent piece 451 Bottom flap (right side plate connection bottom flap)
452 bottom flap (rear plate connection bottom flap)
453 Bottom flap (left side plate connection bottom flap)
454 Bottom flap (front plate connection bottom flap)
451a Folded Curve 453a Folded Curve 461 Notched Piece E Tip H Notched Part I Locking Piece (Bent Piece)
M convex body S slit

Claims (8)

A packaging container for packaging a bag body having a pouring outlet for pouring out liquid,
The front plate which can form the holding hole which penetrates and holds the said pouring outlet, the back plate arranged in the position which counters the front plate, the front plate and the back plate are connected, and the belt-like trunk is connected. Right side plate and left side plate forming the front portion, front plate connection bottom flap connected to the bottom side of the front plate, back plate connection bottom flap connected to the bottom side of the back plate, and bottom side of the right side plate A plurality of bottom flaps comprising a right side plate connection bottom flap and a left side plate connection bottom flap connected to the bottom side of the left side plate, each having at least a bottom lid formed by being folded at each connection portion;
A packaging container characterized in that a convex body including the bottom side is formed on the bottom cover in parallel with the bottom side of the back plate. The connecting portion between the back plate and the back plate connection bottom flap has a first bending curve serving as a base line for bending the back plate connection bottom flap, and the central portion of the back plate connection bottom flap or the vicinity thereof is A second folding curve serving as a base line for folding the back plate connection bottom flap in two in parallel with a first folding line, the back plate side of the left side plate connection bottom flap having an area of the back plate connection bottom flap And a slit forming a part of the locking piece, and a third folding curve serving as a base line for bending the locking piece in parallel with the first folding curve,
The locking piece is bent outward with the third fold line as a base line, and an acute angle portion is formed between the right side plate connection bottom flap and the locking piece, and the back of the second fold line is formed as a base line. In a state in which the face plate connection bottom flap is folded in two, the tip of the back plate connection bottom flap abuts on the acute angle portion to form the convex body having the second folding curve as a top. The packaging container of claim 1. The length of the front plate connection bottom flap is equal to or less than the length of the right side plate connection bottom flap and the left side plate connection bottom flap, and the length of the back plate connection bottom flap is the front plate connection bottom Longer than the difference between the length of the flap and the length of the right side plate connection bottom flap and the left side plate connection bottom flap,
The connecting portion between the back plate and the back plate connection bottom flap has a first bending curve serving as a base line for bending the back plate connection bottom flap, and the central portion of the back plate connection bottom flap or the vicinity thereof is A second fold curve serving as a base line for folding the back plate connection bottom flap in two parallel to the first fold curve is provided, and the tip side of the front plate connection bottom flap is parallel to the first fold curve. It has a third folding curve that serves as a base line that bends the tip of the front plate connection bottom flap to form a locking piece,
The locking piece is formed by bending the front end of the front plate connection bottom flap outward with the third fold line as a base line, and the front plate connection bottom flap and the bottom flap disposed below the front plate connection bottom flap An acute angle portion is formed between the two, and a tip end portion of the back plate connection bottom flap abuts on the acute angle portion in a state where the back plate connection bottom flap is bent in two with the second bending line as a base line. The packaging container according to claim 1, wherein the convex body having the second fold line as a top is formed.   The packaging container according to claim 2 or 3, wherein the back plate connection bottom flap is bonded to the bottom flap forming the locking piece without being bent with the second fold line as a base line. The connection portion between the back plate connection bottom flap and the back plate has a first bending curve serving as a base line for bending the back plate connection bottom flap, and the right side plate side of the back plate connection bottom flap and the left side plate On the side, each has a notch forming an insertion piece and a locking piece connected to the tip of the insertion piece, and the central part of the insertion piece or its vicinity is parallel to the first folding line A notch having a second bending line, and the end on the back plate side of the right side plate connection bottom flap has a width wider than the width of the insertion piece and a insertion hole narrower than the width of the locking piece A third portion of the left side plate connection bottom flap on which the back plate side is formed is a slit that forms a part of the bent piece and a base line that bends the bent piece in parallel with the first bent curve Have a curve and
The bent piece is bent outward with the third bent line as a base line, and the insertion piece disposed in the insertion hole becomes visible, and the locking piece is bent while the second bent line is bent. The packaging container according to claim 1, wherein the convex body is formed by pulling out the insertion piece until it is caught by a hook of the insertion hole. The connection portion between the back plate connection bottom flap and the back plate has a first bending curve serving as a base line for bending the back plate connection bottom flap, and a tip portion of the back plate connection bottom flap is a first meshing portion And the back plate side of the left side plate connection bottom flap has a slit forming a part of a bending piece and a third bending line serving as a base line for bending the bending piece in parallel with the first bending curve And the tip end portion of the bent piece has a second meshing portion meshing with the first meshing portion,
The bent piece is bent outward with the third bending line as a base line, and the first meshing portion is bent outward with the first bending line as a base line, thereby the first meshing portion and the second meshing portion The packaging container according to claim 1, wherein the convex body is formed by meshing with one another. The right side plate, the left side plate, and the back plate have a cutting line for forming a triangular prism-shaped notch in the bottom corner on the back plate side, and the back plate side of the right side plate connection bottom flap And the back plate side of the left side plate connection bottom flap has a bending curve,
The packaging container according to claim 1, wherein the convex body is formed by cutting the cutting line and raising the notch piece with the folding line as a base line. The packaging container according to any one of claims 1 to 7, wherein the bag is an inner bag constituting a bag-in-box, and the packaging container is an exterior box constituting the bag-in-box.

Images