JP2017043384A - Outlet stopper and packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container provided with a spout plug which can be easily separated. SOLUTION: A spout plug includes a cylindrical side wall, a disk-shaped flange portion provided so as to extend outward from one end edge of the side wall, and a male screw formed on an outer peripheral surface of the side wall. , A cap with a female screw formed on the inner peripheral surface is screwed, and a cut portion to be arranged in an annular shape is formed on the bottom surface, which is the surface opposite to the side wall side surface of the flange portion, and the side wall surface. Of the portion of the outer peripheral surface facing the inner peripheral surface of the cap when the cap is screwed, a thick portion is formed on the flange side of the male screw so that at least a part of the outer peripheral surface protrudes. [Selection diagram] Fig. 3

Description

  The present invention relates to a spout stopper and a packaging container.

  A sheet material in which a barrier layer such as an aluminum foil, an aluminum vapor deposition film, or an inorganic oxide vapor deposition film is laminated between a paper base material layer and a thermoplastic resin sealant layer is folded into a box shape. A packaging container formed by overlapping and sealing ends is known (Patent Document 1).

  There are various types of such packaging containers. One of them is a gable top type (gable roof type) roof plate provided with a cap made of polyethylene or the like and a spout stopper, so that the liquid can be poured. There are known packaging containers that can be removed. In the case of such a packaging container, at the time of disposal, it is preferable to separate a container body made of a paper sheet material and a spout stopper welded to the container body for separate collection. As a method of separation, there is a method of opening the top seal portion and cutting the sheet material around the spout plug with scissors or the like. However, such a packaging container is usually not easily disassembled because the top seal part is firmly fused, and the spout stopper is often not separated from the packaging container.

  In Patent Document 2, a spout stopper having an annular body (flange portion) and a cylindrical body and having an annular thin portion formed on the inner peripheral side upper surface of the annular body is attached to a paper container in which a folding guide line is formed. A paper package is disclosed. According to this paper packaging body, by folding the paper packaging body along the folding guide line, the annular thin wall portion is broken, and the tubular body of the spout stopper can be separated from the paper container.

JP 2003-335362 A Japanese Patent No. 5469421

  However, in the conventional spout stopper as shown in Patent Document 2, there is a problem that even when the paper package is folded, the stress for breaking does not concentrate on the thin-walled portion, and a large load is required for breaking. there were.

  This invention is made | formed in view of such a subject, and it aims at providing the spout stopper which can be isolate | separated easily with little load, and a packaging container provided with the same.

  One aspect of the present invention for solving the above problems is formed on a cylindrical side wall, a disk-like flange portion provided to extend outward from one end edge of the side wall, and an outer peripheral surface of the side wall. A spout stopper provided with a male screw and threadedly engaged with a cap having a female screw formed on the inner peripheral surface, and arranged annularly on the bottom surface, which is the surface opposite to the side wall side surface of the flange portion Of the outer peripheral surface of the side wall facing the inner peripheral surface of the cap in a state where the cap is screwed, at least a part of the outer peripheral surface is formed on the flange side of the male screw. It is a spout stopper in which the protruding thick part is formed.

  Moreover, the other situation of this invention is a packaging container provided with the above-mentioned spout stopper and the container main body to which the flange part of the spout stopper was attached.

  ADVANTAGE OF THE INVENTION According to this invention, the packaging container provided with the spout stopper which can be isolate | separated easily with less load compared with the past can be provided.

The perspective view of the packaging container which concerns on one Embodiment of this invention The top view of the blank used for the packaging container concerning an embodiment Sectional drawing and top view of the spout stopper used for the packaging container which concerns on embodiment The perspective view which shows each process which concerns on the separation method of a spout stopper Partial sectional view showing the state of the flange portion and the side wall periphery in the bending process

  The packaging container 3 which concerns on embodiment of this invention is demonstrated with reference to figures.

(Packaging container)
FIG. 1 shows a perspective view of the packaging container 3. The packaging container 3 is formed by bending a blank 110 obtained by processing a sheet material 200, which will be described later, into a box shape and overlaying and sealing the end portions, and then screwing into the spout stopper 1 and the spout stopper 1. The cap 2 is provided. The container main body 100 includes a top portion 101 that is an upper portion when standing upright, a body portion 102 that is a side surface, and a bottom portion 103 that is a lower portion, and the top portion 101 includes two roof plates 106 (106a and 106b) and a roof plate. A folding plate 107 and a folding plate 108 that are folded between 106 are included. A circular pouring hole 114 is formed in the roof plate 106a. The spout stopper 1 is attached to the spout hole 114.

(blank)
In FIG. 2, the top view of the blank 110 which is an example of the blank used as the raw material of the container main body 100 is shown. The blank 110 includes roof plates 106a and 106b constituting the top 101, folding plates 107 and folded plates 108, four side plates 111 constituting the body portion 102, a bottom plate 112 constituting the bottom portion 103, and end portions. And a formed seal portion 113. The blank 110 is formed in a box shape by bending the blank 110 in accordance with the alternate long and short dash line shown in FIG. 2 and sealing the seal portion 113 at the opposite end. A pouring hole 114 for inserting and fixing the pouring spout 1 is formed near the center of the roof plate 106a.

(Sheet material)
The sheet material has, for example, a printing layer / thermoplastic resin layer / paper base material layer / adhesive resin layer / barrier layer / adhesive layer / sealant layer in order from the outside to the inside of the packaging container 3.

(Outlet cap and cap)
FIG. 3 shows a cross-sectional view (a) of the spout stopper 1 and the cap 2, a plan view (b) viewed from below, and the shape (c) of the cap 2 and the thick portion 24 in a cut surface parallel to the flange portion 15 Some of the modifications (d) and (e) are shown. The spout stopper 1 includes a cylindrical side wall 11, a partition wall 14 that closes the inside of the side wall 11, a disk-like flange portion 15 provided so as to extend outward from one end edge of the side wall 11, and a flange portion 15 and a plurality of recesses 17 formed on the bottom surface 20. The spout stopper 1 can be manufactured by integral molding using LDPE, LLDPE or the like. The cap 2 includes a top plate 31, a peripheral wall 32 suspended from the outer peripheral edge of the top plate 31, and a female screw 33 provided on the inner surface of the peripheral wall 32. The peripheral wall 32 includes a female screw 33 and a lower end. There is a region where the female screw 33 is not formed between them.

  The side wall 11 can be screwed with the cap 2 in which the male screw 12 is formed on the outer peripheral surface 21 and the female screw 33 is formed. Further, on the outer peripheral surface 21 of the side wall 11 and below the male screw 12, three projecting portions 19 projecting outward are formed so as to equally divide the circumference. Further, a disc-shaped flange portion 15 is provided so as to extend outward from the outer peripheral surface 21 of the side wall 11 below the projection portion 19. The surface on the side wall 11 side of the flange portion 15 is attached to the container main body 100 by ultrasonic welding. Further, the protruding portion 19 sandwiches the container body 100 between the flange portion 15.

  As shown in FIG. 3, as an example, a plurality of recesses 17 partitioned by a plurality of ribs 18 are annularly formed on the bottom surface 20, which is the surface of the flange portion 15 opposite to the side on which the side wall 11 side is provided. Arranged to form a cutting scheduled portion 22. The planned cutting portion 22 is not limited to the illustrated form, and can be formed in various ways by making it thinner than other portions on any surface of the flange portion 15, for example. Further, projections of various shapes may be formed on each surface of the flange portion 15 as energy directors that enhance the weldability by controlling the degree of concentration of ultrasonic energy when ultrasonic welding is performed.

  3A and 3C to FIG. 3E, the outer peripheral surface 21 of the side wall 11 is a portion of the portion facing the inner peripheral surface of the peripheral wall 32 of the cap 2 in a state where the cap 2 is screwed. A thick portion 24 that protrudes at least partially in the portion on the flange portion 15 side from the male screw 12 is formed. The thick part 24 may be formed continuously over the entire circumference of the outer peripheral surface 21 as shown in FIG. 3C, for example, and as shown in FIG. 3D and FIG. The surface 21 may be formed intermittently. Further, the cross-sectional shape of the thick portion 24 formed intermittently on the outer peripheral surface 21 can be formed in an arbitrary shape such as a square shape or a semicircular shape as shown in FIGS.

  When the hot contents are filled, cooling water may be showered on the entire packaging container in order to cool the contents. When cooling water is showered over the entire packaging container after high-temperature filling, the spout cap is also cooled, so the space between the spout cap and the cap is depressurized, and the showered cooling water flows between the spout cap and the cap. In some cases, the gap may enter the space between the spout stopper and the cap. If there is no gap between the thick portion 24 and the peripheral wall 32 of the cap 2, the water that has entered between the spout stopper and the cap may not be properly discharged. For this reason, as shown in FIG. 3C, when the thick portion 24 is continuously formed over the entire circumference of the outer peripheral surface 21, a thickness of 0. 0 is provided between the thick portion 24 and the peripheral wall 32 of the cap 2. It is preferable to provide a gap of 1 mm or more.

  The partition wall 14 is formed near the lower end of the side wall 11 so as to separate the upper end side and the lower end side inside the side wall 11. Moreover, the partition 14 is connected with the side wall 11 through the half cut 16 which formed the outer wall thickness thinly in the shape of a ring. A pull ring 13 is connected to the upper surface of the partition wall 14 via a support column. The user of the packaging container 3 pulls the pull ring 13 upward, pulls out the partition wall 14 broken along the half cut 16 from the side wall 11, and connects the upper end side and the lower end side of the side wall 11 to communicate the packaging container 3. Can be opened.

(Disassembly method)
Below, the separation method of the spout stopper 1 is demonstrated. In FIG. 4, each process which concerns on the isolation | separation method of the spout stopper 1 is shown.

<Crushing process>
FIG. 4A shows a process of crushing the packaging container 3. In this step, the user of the packaging container 3 crushes the trunk portion 102 by pushing the two opposing side plates 111 extending below the roof plate 106 in a direction in contact with each other. The two side plates 111 in contact with the side plate 111 to be crushed are folded in the inner direction of the packaging container 3.

<Bending process>
FIG. 4B shows a process of bending the packaging container 3. In this step, as shown in FIG. 4B, the user bends the roof portion 106, the side plate 111, and the bottom plate 112 upright, for example, in the left-right direction. At this time, the broken line formed on the roof plate 106 passes through the extraction hole 114.

  Since the broken line formed by this process passes through the pouring hole 114, a part of the flange portion 15 of the pouring spout 1 attached to the pouring hole 114 is also bent in the same direction as the roof plate 106. A load is applied. Here, since the cut-out portion 22 is formed in the spout stopper 1, at least a portion of the break is generated around the spout stopper 1.

<Outlet plug separation process>
FIG. 4C shows a step of separating the spout stopper 1 from the packaging container 3. Since the fracture has occurred around the recess 17 of the spout stopper 1 in the previous process, the user cuts the spout stopper 1 along the planned cutting portion 22 with a slight force from this point, and includes the side wall 11. Can be separated from the packaging container 3.

  The above-described process is an example and can be variously modified. For example, a weakened line with weakened strength may be appropriately provided in the packaging container 3 and bent along this line. In addition, there may be a step of separating the packaging container 3 into two or more along the line of weakness before or after separation of the spout stopper.

(Function of thick part)
FIG. 5 is a partial cross-sectional view showing the surroundings of the flange portion 15 and the side wall 11 in the above-described “bending step”. FIG. 5A shows a case where the thick portion 24 is not provided for comparison, and FIG. 5B shows a case where the thick portion 24 is provided.

  In the bending process described above, a load is applied to the flange portion 15 in the direction indicated by the arrow in FIG. At this time, the load is also transmitted from the flange portion 15 to the side wall 11. When the thick part 24 is not provided, as shown in FIG. 5A, the lower part of the side wall 11 is deformed so as to expand to the side where the load is applied. In this way, the load acts on the portion closer to the side wall 11 than the planned cutting portion 22 and is deformed. Therefore, the load is not concentrated on the planned cutting portion 22, and the planned cutting portion 22 is hardly deformed or broken.

  On the other hand, when the thick portion 24 is provided, the rigidity of the lower portion of the side wall 11 is increased as compared with the case where the thick portion 24 is not provided, as shown in FIG. Further, the thick part 24 is opposed to the peripheral wall 32 of the cap 2. By these, the deformation | transformation to the direction where the diameter expands the lower part of the side wall 11 is suppressed.

  In this way, the deformation of the side wall 11 is suppressed, and the load is easily concentrated as stress for deformation and breakage of the planned cutting portion 22, and the planned cutting portion 22 can be broken with a smaller load than before.

  The present invention is useful for a paper packaging container or the like that contains a liquid or the like.

DESCRIPTION OF SYMBOLS 1 Outlet plug 2 Cap 3 Packaging container 11 Side wall 12 Male screw 13 Pull ring 14 Bulkhead 16 Half cut 15 Flange part 17 Recessed part 18 Rib 19 Protrusion part 20 Bottom face 21 Outer peripheral surface 22 Planned cutting part 23 Rib top face 24 Thick part 31 Top plate 32 Peripheral wall 33 Female screw 100 Container body 101 Top 102 Body 103 Bottom 106, 106a, 106b Roof plate 107 Folding plate 108 Folding plate 110 Blank 111 Side plate 112 Bottom plate 113 Sealing portion 114 Outlet

Claims (3)

A cylindrical side wall;
A disc-shaped flange provided to extend outward from one end edge of the side wall;
A spout stopper that includes a male screw formed on the outer peripheral surface of the side wall, and that is screwed with a cap formed with a female screw on the inner peripheral surface;
On the bottom surface, which is the surface on the opposite side to the surface on the side wall of the flange portion, a cutting planned portion arranged in an annular shape is formed,
Of the portion of the outer peripheral surface of the side wall that faces the inner peripheral surface of the cap in a state where the cap is screwed, at least a part of the outer peripheral surface protrudes from the male screw to the flange side portion. A spout stopper with a thick part.   The spout stopper according to claim 1, wherein the thick portion is formed over the entire outer periphery of the side wall. The spout stopper according to claim 1,
A packaging container comprising: a container body to which a flange portion of the spout stopper is attached.