JP4535454B2 - Double container - Google Patents

Description

  The present invention comprises an inner container made of a synthetic resin and a paper outer container provided so as to cover at least a side portion of the inner container, so that the outer container can be broken and removed from the outer container. The present invention relates to the improvement of the double container provided with the easy break line.

Conventionally, an inner container of a compressed air molded product of a resin sheet and a composite container having a rectangular paper container box or a paper round / square cup as an outer container are combined by bonding of an adhesive, an adhesive, an upper curl portion, or the like. .
Therefore, the separation of the inner container and the outer container is performed by breaking the outer container by using a zipper wire consisting of an easily breakable line such as a notch or perforation made in the outer container. (For example, utility model registration No. 2509655, utility model registration No. 2593375, JP 2000-219280, etc.).
In some cases, a cut piece is formed in the end portion of the outer container to form a pushing piece portion that serves as a starting point for break opening (Japanese Patent Laid-Open No. 11-278456).
However, depending on the perforation accuracy of the zipper wire perforated to the blank material and the forming accuracy of the paper cup, the position of the start point that triggers opening may be shifted and a cut may not be formed at the bottom end of the outer container.
Therefore, punching and molding accuracy are required for positioning, which is a complicated operation requiring skill.
Utility model registration No. 2509655 See Fig. 1 Utility Model Registration No. 2593375 Refer to Figure 2 Japanese Patent Laid-Open No. 2000-219280 See FIG. JP-A-11-278456

  The present invention has been made in view of the above circumstances, and its main problem is that the outer container can be securely attached even when the punching position of the easily breakable line and the molding position of the paper cup cannot be accurately aligned. An object of the present invention is to provide a double container which can be opened and broken so that the outer container and the inner container can be separated and separated.

In order to solve the above problem, the invention of claim 1
The inner container is composed of a synthetic resin inner container and a paper outer container covering at least the side of the inner container, and the inner container is engaged with the upper part of the outer container. In the double container provided with an easily breakable line so that the inner container can be removed by breaking,
The easily breakable line is formed symmetrically with respect to the height direction of the container and extends in the vertical direction, and the tip extending above the easily breakable line extends to the vicinity of the flange portion, and below the easily breakable line. The extending tip extends to the vicinity of the bottom wall,
A push piece comprising a circular or substantially semicircular cut line, in which the easily breakable line is arranged above the formation position of the bottom wall portion in the body portion of the outer container to form a space for inserting a finger. Zipper wire formation for forming a strip-like piece extending along the breaking direction, comprising an incision cut line for forming a cut line extending in contact with the forming part and the pushing piece forming part and extending upward or downward of the outer container And consists of
Between the barrel portion of the inner container and the barrel portion of the outer container, there is a space where the barrel portion of the inner container is recessed at a position corresponding to the pushing piece forming portion of the outer container. The torso and the torso of the outer container are in contact,
When the pushing piece forming portion is pushed into the space and the corresponding portion of the body portion of the inner container is bent inward to separate the pushing piece portion from the body portion of the outer container, the pushing piece portion is A space for inserting a finger can be formed between the trunk portion and the outer wall surface of the trunk portion of the inner container.
In the invention of claim 2,
The inner container has a stepped portion with a small diameter in the trunk,
The pushing piece forming portion is formed at a location corresponding to the step portion of the inner container,
When the pushing piece is separated from the barrel of the outer container while the pushing piece forming part is pushed in and the trunk of the inner container is bent inward, the pushing piece is hooked on the step of the inner container. And a space for inserting a finger can be formed between the body portion of the outer container and the outer wall surface of the body portion of the inner container.
In the invention of claim 3,
The outer container has a cylindrical part with a curled part that is rolled up at the upper end part, and a peripheral wall of a bottom wall part that is formed in a reverse plate shape at the folded part at the lower end of the cylindrical part. Wearing it,
The inner container has a flange portion that is caught and hooked in a curl shape outside the curl portion ,
The strip-shaped piece formed by cutting out the zipper wire forming part deforms the curled part, or tears off the flange part of the inner container that is externally fitted to the curled part to remove the inner container from the outer container. It can be separated .
In the invention of claim 4,
The easily breakable line is characterized in that the pair of left and right zipper lines of the zipper line forming portion are gradually separated from each other in the cutting direction.

As described above, according to the present invention, even if the perforation of the zipper wire with respect to the blank of the outer container is shifted, the allowable shift range at the time of molding can be increased, and the yield can be reduced.
Moreover, there is no fear that the opening of the leg end portion of the outer container is turned over on the conveyor during operation on the production line, and the quality can be stabilized.

  Hereinafter, a preferred embodiment when the double container of the present invention is applied to a cup-shaped container will be described with reference to the drawings.

As shown in FIGS. 1 to 4, the double container 1 of Example 1 is mainly composed of an inner container 2 made of a synthetic resin having a curled flange portion 3 at the upper end, and a paper sheathed on the inner container 2. And the outer container 5.
The inner container 2 is made of a synthetic resin having appropriate flexibility and elasticity, and a material such as a PE resin, a PP resin, or a PET resin can be selected as appropriate according to the contents and usage.
The outer container 5 is made of paper such as paperboard or a material mainly composed of paper.

[Inner container]
The inner container 2 has a bottomed cup shape, and is overlapped on the outer side of a curled portion 6 of the outer container 5 to be described later on the upper end of the inner container 2 and is curled together with the curled portion 6 to be hooked on the curled portion 6. The flange part 3 to be formed is formed.
In the illustrated example, the upper surface of the flange portion 3 is preferably formed in a substantially horizontal plane.
Further, a step portion 4 having a slightly smaller diameter at the lower position is formed on the trunk portion 2a of the inner container 2 for stacking.

[Outer container]
The outer container 5 includes a barrel portion 7 that has a curl portion 6 that is bent outward at the upper end portion and is formed in a cylindrical shape, and a bottom wall portion 8 that is formed in a substantially reverse plate shape. .
And the said trunk | drum 7 provides the leg part 9 turned inward at the lower end part, and the cyclic | annular surrounding wall of the bottom wall part 8 is between the turned-back part of this leg part 9, and the inner wall face of the trunk | drum 7. The bottom wall portion 8 is attached to the body portion 7 by fitting the 8a from above.
In the present embodiment, the leg portion 9 and the peripheral wall 8a of the bottom wall portion 8 are not bonded or partially bonded, and the bottom wall portion 8 is easily separated from the body portion 7 when the outer container 5 described later is broken. It is molded as follows.

[Pushing piece forming part]
The easily breakable line formed in the outer container 5 extends in the vertical direction in order to form a pair of left and right zipper lines connected to the pushing piece forming part 10 and the pushing piece part 11 in series. The zipper wire forming portion 20 is formed of intermittent cuts or perforations.
In the case of the present embodiment, the pushing piece forming portion 10 is formed by a cut for forming the pushing piece portion 11 at the upper end position of the leg portion 9 corresponding to the upper surface of the bottom wall portion 8 in the body portion 7 of the outer container 5. ing.

Here, the pushing piece forming part 10 is composed of intermittent cuts along an upward substantially semicircular shape whose lower end is opened.
Thus, as shown in FIG. 3 (a), by pushing the pushing piece forming part 10 inward, the lower end is connected to the body part 7 above the bottom wall part 8, and the upper part is substantially semicircular. The pushing piece portion 11 can be separated from the trunk portion 7 while the pushing piece portion 11 is punched out and the trunk portion 2a of the inner container 2 fitted inside is bent inward.

[Zipper wire forming part]
The zipper wire forming portion 20 is connected to the pushing piece forming portion 10 to form a strip or strip that extends to the upper portion of the outer container 5, just below the curled portion 6 in the illustrated example. It consists of perforations.
In the illustrated example, the pair of perforations are formed in a tapered shape so that the width gradually increases upward (see FIG. 1).

Therefore, as shown in FIG. 3A, the pushing piece forming portion 10 is pushed in to separate the pushing piece portion 11.
By further pushing in, the pushing piece 11 is hooked to the lower step 4 while bending the inner container 2, and between the trunk 7 of the outer container 5 and the outer wall surface of the trunk 2 a of the inner container 2. A space S for inserting a finger into the space can be formed.

  Then, as shown in FIG. 3 (b), a finger is inserted into the space S of the body portion 7 formed by separating the pushing piece portion 11, and the zipper wire forming portion 20 is moved upward from below along a pair of left and right perforations. Pull up.

  Thereby, as shown in FIG.3 (c), the cut | interruption of the zipper wire formation part 20 is connected and cut off, the strip piece 21 is formed, the trunk | drum 7 of the cylindrical outer container 5 is fractured | ruptured, The inner container 2 can be separated from the outer container 5 by deforming or tearing off the curled part 6 and removing the flange part 3 of the inner container 2 fitted and locked to the curled part 6 from the curled part 6. .

  Further, as shown in FIG. 3 (d), if the pushing piece 11 is bent outwardly and pulled downward, the leg 9 of the outer container 5 is torn, and the bottom wall 8 is turned to the trunk. 7 and separated from the inner container 2 by pushing up the inner container 2 from below.

Since the bottom wall portion 8 is not bonded to the bottom surface of the inner container 2, the inner container 2 is separated from the outer container 5.
In this way, the outer container 5 is broken using the pushing piece forming part 10 and the zipper wire forming part 20 and separated from the outer container 5 and the inner container 2, so that they can be easily separated and discarded (see FIG. 4).

Here, the blank used as the trunk | drum 7 of the outer container 5 is shown in FIG.
With respect to the blank of the body portion 7 formed in a substantially fan shape, the pushing piece forming portion 10 and the zipper wire forming portion 20 are both formed at midway positions so that the cut line does not connect to the edge.

  Therefore, even when a molding error occurs in the blank, or even when a misalignment occurs in the molding of the easily breakable line formed of the indented piece forming portion 10 and the zipper wire forming portion 20, the indented piece formation is performed. The part 10 is pushed in to form the pushing piece part 11, and the outer container 5 can be separated along the zipper line by using it as a trigger, so that accuracy is not required for molding.

In the first embodiment, the case where the pushing piece forming portion 10 is provided below the trunk portion 7 of the outer container 5 is illustrated, but it may be disposed above the trunk portion 7.
In the double container 1 of Example 2, as shown in FIG. 6, as the pushing piece forming part 10, the perforation made of a substantially semicircular arc with the upper part on the curled part 6 side of the outer container 5 opened. It has become.

Thus, by pushing the pushing piece forming part 10 inward, the curled part 6 is connected, and the pushing piece part having a substantially semicircular shape with the lower part is punched out, and the body of the inner container 2 fitted inside is pushed. The pushing piece part can be separated from the body part 7 while the part is bent inward.
The zipper wire forming portion 20 is connected to the pushing piece forming portion 10 from a pair of left and right perforations for forming a strip-like piece extending to a position corresponding to the lower portion of the outer container 5, which is substantially the bottom wall portion 8 in the illustrated example. It has become.

  Therefore, the strip-shaped piece is cut off by pushing down the pushing piece forming portion 10 to form the pushing piece portion and pulling it downward from the top along the pair of left and right perforations from the gap between the body portion 7 formed thereby. Then, the trunk portion 7 of the cylindrical outer container 5 is broken, and further pulled down, the leg portion 9 of the outer container 5 is torn, and the bottom wall portion 8 is separated from the trunk portion 7.

Moreover, if the said pushing piece part is pulled up upwards, the curl part 6 of the outer container 5 will be deform | transformed or torn, and the surrounding wall of the flange part 8 of the inner container 2 can be removed from the curl part 6, and can be isolate | separated.
Since other configurations are the same as those in the above embodiment, the description thereof is omitted.

In the double container 1 of the third embodiment, as shown in FIG. 7, a perforation made of a substantially semicircular arc is formed at the approximate center of the body part 7 of the outer container 5 as the pushing piece forming part 10. .
In the illustrated example, the arc has an upward arc shape with an open lower portion, and a first zipper line forming portion 20A composed of a pair of left and right perforations extending downward continuously from both lower ends of the arc is an outer container 5. It extends to a position substantially corresponding to the bottom wall portion 8 below the body portion 7.

A second zipper wire forming portion 20B comprising a pair of left and right perforations extending upwardly in series with the first zipper wire forming portion 20A facing the first zipper wire forming portion 20A is formed on the upper portion of the arc shape of the pushing piece forming portion 10. Is formed and extends to a position substantially corresponding to the base end of the curled portion 6 of the outer container 5.
As a result, the user pushes the pushing piece forming portion 10 inward, separates it from the body portion 7 to form the pushing piece portion, holds the pushing piece portion, and pulls it down as it is along the first zipper wire forming portion 20A. Thus, the lower portion of the barrel portion 7 can be broken to separate the barrel portion 7 and the bottom wall portion 8.

Further, the upper portion of the body portion 7 is similarly broken by pinching the lower end of the second zipper wire forming portion 20B and pulling it up from the gap formed by the pushing piece portion, and the flange portion 3 of the inner container 2 is The curl portion 6 can be removed.
Thereby, the inner container 2 can be separated from the outer container 5 and each can be separated and discarded.

In the above embodiment, the lower part of the pushing piece forming part 10 is formed integrally with the first zipper wire forming part 20A. However, the arc shape of the pushing piece forming part 10 is provided in the reverse direction so that the upper part of the pushing piece forming part 10 is formed. You may form integrally with the 2nd zipper wire formation part 20B.
Further, in the present invention, the shape of the pushing piece forming portion for forming the pushing piece portion is not limited to the substantially semicircular shape, and may be a circle or may be picked by a user with a finger. If it becomes the piece which can be done, the outline shape will not be specifically limited.
Moreover, the zipper wire formation part should just consist of 2 rows of vertical cuts called a zipper wire.

In the double container 1 of the reference example shown in FIG. 8 and FIG. 9, a circular perforation is formed in the approximate center of the body part 7 of the outer container 5 as the pushing piece forming part 10.
And the 1st zipper line formation part 20A and the 2nd zipper line formation part 20B which are extended in the horizontal direction of each right and left in series from the right and left both sides of the circular shape of the pushing piece formation part 10 are provided.

Each of the first zipper line forming portion 20A and the second zipper line forming portion 20B includes a pair of upper and lower tapered perforations that gradually expand outward.
The perforated tips A1 and B1 that are the upper ends of the perforations extend obliquely upward to the lower end of the flange portion 3, and the lower perforations A2 that are the lower ends of the perforations. , B2 extend obliquely downward substantially to the corresponding position of the bottom wall 8.

  As a result, the user pushes the circular pushing piece forming portion 10 inwardly and separates it from the body portion 7 to form the pushing piece portion or completely cut to form a circular hole. The pushing piece portion or hole is used as a trigger. The body part 7 is broken right and left along the first zipper line forming part 20A and the second zipper line forming part 20B, and the upper part of the body part 7 is broken to remove the flange part 3 of the inner container 2 from the curl part 6. Thus, the inner container 2 can be separated, and the body portion 7 and the bottom wall portion 8 can be separated and separated and discarded.

In this case, the first zipper line forming part 20A and the second zipper line forming part 20B are torn in the left-right direction. A taper-shaped cutting line extending upward and a taper-shaped cutting line extending downward to the lower ends A2 and B2.
Since other configurations are the same as those in the above embodiment, the description thereof is omitted.

In the double container 1 as another reference example, as shown in FIG. 10 and FIG. 11, as the pushing piece forming part 10, a linear or substantially laterally U-shaped shape is formed on the lower side of the body part 7 of the outer container 5. Perforations are formed.
And the zipper wire | line formation part 20 which consists of a left-right pair of perforation extended substantially perpendicularly toward right above from the right-and-left both sides of the pushing piece formation part 10 is provided.
Here, the pushing piece forming portion 10 is formed at a position substantially corresponding to the bottom wall portion 8, and the upper end of the zipper wire forming portion 20 extends substantially to the lower end of the flange portion 3.

As a result, the user pushes the pushing piece forming portion 10 inwardly and separates it from the barrel portion 7 to form a pushing piece portion. The pushing piece portion is used as a trigger along the zipper wire forming portion 20. The flange portion 3 of the inner container 2 is removed from the curled portion 6 and the inner container 2 is separated, and the body portion 7 and the bottom wall portion 8 can be separated and discarded separately.
Since other configurations are the same as those in the above embodiment, the description thereof is omitted.

In the above reference example, the case where the lower end of the zipper wire forming part 20 and the pushing piece forming part 10 is arranged so as not to be applied to the leg part 9 is illustrated, but these may extend to the leg part 9.
FIG. 12 illustrates a reference example when the pushing piece forming portion 10 of FIG. 10 extends to a part of the leg portion 9.
Also in this case, the trunk portion 7 can be cut along the zipper wire forming portion 20 using the pushing piece forming portion 10 as a trigger.

Moreover, the upper end of the zipper line | wire formation part 20 or the pushing piece formation part 10 may be extended to the position which contact | connects the curl part 6 and the flange part 3, and does not need to extend to there.
In this invention, even if it does not perform exact positioning, a pushing piece formation part and a zipper wire formation part can be provided, and what is necessary is just to fulfill the function.

In each of the above embodiments, the outer container has a bottom wall portion. However, in the present invention, the outer container may be formed only of a sleeve-shaped body portion without providing the bottom wall portion.
Further, the flange portion of the inner container is externally fitted and locked integrally with the curled portion of the outer container, but the outer container may be provided with only the flange portion without providing the curled portion. .
In addition, it goes without saying that various design changes can be made without departing from the scope of the present invention.

2 is a perspective view of a double container of Example 1. FIG. It is sectional drawing of the double container of FIG. (A) is a cross-sectional view of a state in which the pushing piece forming portion is pushed in to form a pushing piece portion, (b) is a sectional view in a state in which the zipper wire forming portion is pulled up to form a strip-like piece. (C) is sectional drawing of the state which removes a flange part from a curl part, (d) is sectional drawing of the state which pulls down a pushing piece part and cuts off a bottom wall part. It is a perspective view of the state which separated the inner container from the outer container. It is an expanded view which shows the blank of the trunk | drum of the outer container of FIG. 6 is a perspective view of a double container of Example 2. FIG. 6 is a perspective view of a double container of Example 3. FIG. It is a perspective view of the double container of a reference example . It is an expanded view which shows the blank of the trunk | drum of the outer container of FIG. It is a perspective view of the double container of another reference example. It is an expanded view which shows the blank of the trunk | drum of the outer container of FIG. (A) is a perspective view of a double container when the pushing piece forming part extends to the leg part, and (b) is a perspective view of the outer container in a state where the pushing piece part is pulled up and the body part is separated.

DESCRIPTION OF SYMBOLS 1 Double container 2 Inner container 3 Flange part 5 Outer container 6 Curl part 7 Trunk part 8 Bottom wall part 8a Peripheral wall 9 Leg part 10 Pushing piece formation part 11 Pushing piece part 20 Zipper wire formation part 20A 1st zipper wire formation part 20B Second zipper wire forming part 21 strip

Claims (4)

The inner container is composed of a synthetic resin inner container and a paper outer container covering at least the side of the inner container, and the inner container is engaged with the upper part of the outer container. In the double container provided with an easily breakable line so that the inner container can be removed by breaking,
The easily breakable line is formed symmetrically with respect to the height direction of the container and extends in the vertical direction, and the tip extending above the easily breakable line extends to the vicinity of the flange portion, and below the easily breakable line. The extending tip extends to the vicinity of the bottom wall,
A push piece comprising a circular or substantially semicircular cut line, in which the easily breakable line is arranged above the formation position of the bottom wall portion in the body portion of the outer container to form a space for inserting a finger. Zipper wire formation for forming a strip-like piece extending along the breaking direction, comprising an incision cut line for forming a cut line extending in contact with the forming part and the pushing piece forming part and extending upward or downward of the outer container And consists of
Between the barrel portion of the inner container and the barrel portion of the outer container, there is a space where the barrel portion of the inner container is recessed at a position corresponding to the pushing piece forming portion of the outer container. The torso and the torso of the outer container are in contact,
When the pushing piece forming portion is pushed into the space and the corresponding portion of the body portion of the inner container is bent inward to separate the pushing piece portion from the body portion of the outer container, the pushing piece portion is A double container characterized in that a space for inserting a finger can be formed between the trunk part and the outer wall surface of the trunk part of the inner container. The inner container has a stepped portion with a small diameter in the trunk,
The pushing piece forming portion is formed at a location corresponding to the step portion of the inner container,
When the pushing piece part is separated from the trunk part of the outer container while the pushing piece forming part is pushed in and the trunk part of the inner container is bent inward, the pushing piece part is hooked on the step part of the inner container. The double container according to claim 1, wherein a space for inserting a finger can be formed between the body portion of the outer container and the outer wall surface of the body portion of the inner container. The outer container has a cylindrical part that has a curled portion that is rolled up around the upper end, and a peripheral wall of the bottom wall part that is formed in a reverse plate shape at the folded part at the lower end of the cylindrical part. And
The inner container has a flange portion that is caught and hooked in a curl shape outside the curl portion ,
The band-shaped piece formed by cutting the zipper wire forming part deforms the curled part, or tears off the flange part of the inner container that is externally fitted to the curled part to remove the inner container from the outer container. The double container according to claim 1 or 2, which can be separated . 4. The double structure according to claim 1 , wherein the easily breakable line is formed by gradually separating a pair of left and right zipper lines of the zipper line forming portion so as to gradually widen in a cutting direction.

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