JP2013224172A - Paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper container capable of sufficiently reducing a volume by volume reduction operation.SOLUTION: A paper container 1 includes: a takeout part 20 that is provided with a top 4 and is sealable to take out a content outside; a bending line 25 that is provided with the top 4 and is configured so that the top 4 is bendable when a force perpendicular to in a thickness direction is added to the top 4 in a state that the takeout part 20 is sealed; and a ruptured line 26 that is provided with the top 4, is configured so that the top 4 is ruptured by bending the top 4 along the bending line 25 in a state that the takeout part 20 is unsealed, and extends in a direction crossing the bending line 25.

Description

  The present invention relates to a paper container having a cylindrical body part, a top part provided at the upper end of the body part, and a bottom part provided at the lower end of the body part, in which contents are stored.

  A paper cup is known in which a vertical ruled line extending in the vertical direction and a horizontal ruled line extending in the horizontal direction are formed in the body portion in order to facilitate the volume reduction operation of crushing when the used paper container is discarded (Patent Document). 1).

JP 2003-182721 A

  Since the upper end of the body portion of the paper cup of Patent Document 1 is released, it is relatively easy to fold along each ruled line formed in the body portion during volume reduction work. However, in the case of a paper container in which the upper end and the lower end of the body are respectively closed by a plate-like top and bottom, the strength of the top or bottom is relatively high. Therefore, as with the paper cup of Patent Document 1, even if a volume reduction operation is performed by providing a ruled line on the body portion, the top and bottom portions remain unbroken, so that sufficient volume reduction cannot be expected.

  Accordingly, an object of the present invention is to provide a paper container that can realize sufficient volume reduction by volume reduction work.

  The paper container of the present invention has a cylindrical barrel (3), a top (4) provided at the upper end of the barrel, and a bottom (5) provided at the lower end of the barrel. In the paper container (1) in which the contents are contained, the take-out portions (20, 50) provided on either the top portion or the bottom portion and openable for taking out the contents to the outside. ) And the top part or the bottom part provided with the extraction part, and the top part or the bottom part provided with the extraction part with the extraction part opened. A folding line (25) configured to bend the top or the bottom provided with the take-out portion when a force in a direction perpendicular to the vertical direction is applied, and the take-out portion provided It is provided on either the top or the bottom, and the folding part is opened when the take-out part is opened. A tear line (26) configured so that the top or the bottom is torn by bending the top or the bottom along a bend line, and extending in a direction intersecting the bend line. (Claim 1).

  According to this paper container, when a force in a direction perpendicular to the thickness direction is applied to the top part or the bottom part provided with the take-out part in the volume reduction work after use, the top part along the folding line is applied. Or the bottom is bent. Since the tear line extends in a direction that intersects the fold line, when the top or bottom is bent along the fold line, the bending causes stress in the direction that intersects the tear line, causing the top or bottom to tear. Torn along the line. Thereby, a top part or a bottom part is destroyed and the upper end or lower end of a trunk part can be crushed flat. Therefore, it can be avoided that both the top portion and the bottom portion remain without being destroyed in a state where the trunk portion is crushed by the volume reduction operation, and thus sufficient volume reduction is possible.

  As one aspect of the paper container of the present invention, the take-out portion includes an opening (21) penetrating the top portion or the bottom portion, and each end portion (25a, 26a) of the fold line and the tear line is the You may communicate with an opening part (Claim 2). According to this aspect, in the volume reduction operation after use, the top portion or the bottom portion is reliably bent by the folding line with the opening as a trigger, and the top portion or the bottom portion is reliably torn along the tear line. Thereby, since the top part or the bottom part can be reliably destroyed by the volume reduction work, the workability of the volume reduction work is improved.

  As one aspect of the paper container of the present invention, the takeout part may include a half cut part (51) cut into the top part or the middle of the bottom part in the thickness direction (Claim 3). According to this aspect, the provision of the half-cut portion partially reduces the strength at that location. Therefore, the extraction part can be easily opened by applying a force to the half-cut part.

  As one aspect of the paper container of the present invention, either the top part or the bottom part provided with the take-out part is made of paper (11) having a grain (PG) which is a flow direction of pulp fibers, The tear line may extend in the same direction as the paper grain. In general, a paper having a grain has mechanical characteristics that the tensile strength in the same direction as the grain is higher than the tensile strength in a direction perpendicular to the grain. According to this aspect, since the tear line extends in the same direction as the paper grain, the top portion or the bottom portion is easily torn along the tear line. Therefore, the top part or the bottom part can be easily and reliably destroyed in the volume reduction operation.

  In one aspect of the paper container of the present invention, the body part extends in a vertical direction, and a body part fold line configured to bend the body part when a force is applied to the body part ( 30), and the body fold line may be located on an extension line of the fold line in the radial direction (Claim 5). According to this aspect, when the top part or the bottom part is bent along the fold line and is torn along the tear line and destroyed, the body fold line located on the extension line of the fold line on the top part or the bottom part is changed. A body part is bent along. Thereby, in the volume reduction operation | work, a trunk | drum can be crushed flat easily with a top part or a bottom part.

  In this aspect, the body portion is configured such that the body portion is bent in a lateral direction when the body portion is bent along the body portion bend line, and a direction crossing the body portion bend line. An auxiliary fold line (31) may be provided that extends to the front (claim 6). In this case, the body portion is bent in the lateral direction along the auxiliary folding line. In the volume reduction operation, the body part is bent in the lateral direction, so that one of the top part or the bottom part that is not destroyed can be placed along the flattened body part. Therefore, the overall thickness of the paper container after volume reduction can be reduced.

  In one aspect of the paper container of the present invention, each of the fold line and the tear line is configured as a half cut part that is cut halfway in the thickness direction of the top part or the bottom part. Any one of the bottoms may be provided with a film-like protective member that is attached so as to cover the cuts (25b, 26b) cut in the half-cut part (Claim 7). According to this aspect, the cut end on the side cut by the half-cut portion is covered with the protective member. For this reason, when the cut side is the inside of the paper container, contact between the cut end of the half cut portion and the contents can be avoided, and when the cut side is the outside of the paper container, the half cut portion The exposure of the cut surface can be avoided.

  In addition, in order to make an understanding of this invention easy, the reference sign of the accompanying drawing was attached in parentheses, but this invention is not limited to the form of illustration by it.

  As described above, according to the paper container of the present invention, the top portion or the bottom portion is bent along the fold line and torn along the tear line during the volume reduction operation, so that the top portion or the bottom portion is broken. Thus, the upper end or the lower end of the body portion can be flattened. Therefore, it can be avoided that both the top portion and the bottom portion remain without being destroyed in a state where the trunk portion is crushed by the volume reduction operation, and thus sufficient volume reduction is possible.

The perspective view which cut and showed the paper container which concerns on one form of this invention. Sectional drawing which showed the structure of the raw material of the paper container of FIG. The top view which showed the top part of the state which peeled off the cover tape of the paper container of FIG. Sectional drawing along the IV-IV line of FIG. Explanatory drawing which showed the state which applied force to the upper end of a trunk | drum for volume reduction work. Explanatory drawing which showed the state by which the trunk | drum was further crushed rather than the state of FIG. Explanatory drawing which showed the state which bent the trunk | drum along the trunk | drum folding line. Explanatory drawing which showed the state which bent the trunk | drum along the auxiliary bending line. The figure which showed the state seen from the VIIC direction of FIG. 7B. Explanatory drawing which showed the manufacturing method of a paper container. Explanatory drawing which showed the other form of the opening part. Explanatory drawing which showed the other form of the extraction part. Explanatory drawing which showed the comparative example.

  In the paper container 1 shown in FIG. 1, beverages such as soft drinks and milk drinks, which are contents, are stored. The paper container 1 includes a wall portion 2 that closes the inside in a state where a predetermined beverage is stored. The wall portion 2 includes a cylindrical body portion 3 having a cylindrical surface with a constant diameter in the vertical direction, a circular top portion 4 that closes the upper end of the body portion 3, and a bottom portion 5 that closes the lower end of the body portion 3. .

  The paper container 1 is attached with a straw 6 for a user to inhale a beverage. The straw 6 is stored in a transparent sachet 7. The pouch 7 is affixed to the body 3. The straw 6 can be taken out by peeling the pouch 7 from the body 3 and breaking the pouch 7. The straw 6 is configured as a well-known telescopic straw.

  Each element of the wall 2 is made of the laminated material 10 shown in FIG. The laminated material 10 is configured in a thin plate shape. One side 11a (the lower side in FIG. 2) of the paper substrate 11 is covered with a polyethylene layer 12 that provides water resistance, and the other side 11b (the upper side in FIG. 2) is covered with a coating layer 13. The covering layer 13 is configured by laminating these layers in the order of the first polyethylene layer 14, the aluminum layer 15, and the second polyethylene layer 16 from the paper substrate 11 side. Each element of the wall portion 2 is assembled so that the polyethylene layer 12 is positioned on the inner side of the container and the covering layer 13 is positioned on the outer side of the container. Various types of paper can be used as the paper base 11. For example, cup base paper, synthetic paper, clay coated paper, craft paper, or the like can be used as the material of the paper base 11. In addition, as a basic weight of the paper of the paper base material 11, the range of 200-300 g / m <2> is preferable on cup forming. Each of the polyethylene layers 12, 14, and 16 is made of low-density polyethylene and has a thickness of about 15 μm.

  As shown in FIG. 1, the top portion 4 of the paper container 1 is provided with a takeout portion 20 for taking out the beverage as the contents. The take-out portion 20 includes an opening 21 for inserting the straw 6 or functioning as a drinking mouth, and a lid tape 22 attached to the top portion 4 so as to close the opening 21. The opening 21 penetrates the top 4. As shown in FIGS. 3 and 4, two folding lines 25 arranged on the same straight line and a tear line 26 extending in a direction perpendicular to each folding line 25 are formed on the top portion 4. As shown in FIG. 4, each of the folding line 25 and the tear line 26 is configured as a half-cut portion that is cut halfway in the thickness direction of the top portion 4. As shown in FIG. 3, each of the end portion 25 a of the folding line 25 and the end portion 26 a of the tear line 26 communicates with the opening 21. As shown in FIG. 4, the cut edges 25 b and 26 b of the folding line 25 and the tear line 26 are covered with a film-like protective member 28, and the protective member 28 is heated on the inner surface side of the top 4. It is pasted by the seal method. Thereby, it can prevent that the drink which is a content permeate | transmits from the cut ends 25b and 26b of the fold line 25 and the tear line 26. FIG.

  In order to reduce the volume of the used paper container 1 after the beverage is taken out, as shown in FIG. 5, it is orthogonal to the thickness direction of the top part 4 so as to crush the upper end of the body part 3. When the force F is applied in the direction (vertical direction in FIG. 5), the folding line 25 rises upward from the end 25 a side with the opening 21 as a trigger, and the top 4 is bent along the folding line 25. Due to the bending, a stress f in the direction crossing the tear line 26 is generated in the top part 4, and the top part 4 is torn by the stress f from the end part 26 a of the tear line 26. Further, when the body portion 3 is crushed as shown in FIG. 6, the top portion 4 is largely torn along the tear line 26, and the opposite side 4 a of the top portion 4 where the tear line 26 is not formed is also open 21. Torn from the starting point. Thereby, the destroyed top part 4 is folded so as to protrude from the body part 3, and the upper end of the body part 3 is flattened.

  As shown in FIG. 1, a body fold line 30 extending in the vertical direction and an auxiliary fold line 31 extending in a direction crossing the body fold line 30 are formed on the body 3 of the paper container 1. . These folding lines 30 and 31 are configured as ruled lines formed by embossing. The body fold line 30 is located on an extension line of the fold line 25 formed on the top 4 and is formed not only on the front side of FIG. 1 but also on the back side. That is, a total of two body fold lines 30 are formed on the body 3, one for each 180 °. Therefore, when the upper end of the body part 3 is flattened as shown in FIG. 6, the body part 3 is bent along the body part fold line 30 as shown in FIG. 7A. At that time, the bottom 5 is distorted but maintained without being destroyed. Then, as shown in FIGS. 7B and 7C, the trunk portion 3 is folded in the lateral direction along the auxiliary folding line 31, so that the unbroken bottom portion 5 is folded along the trunk portion 3.

  The paper container 1 is manufactured through steps (a) to (j) in FIG. First, the above-described laminated material 10 (FIG. 2) is prepared. In the step (a) of FIG. 8, the laminate blank 10 'is cut out from the laminated material 10 using a cutting machine (not shown). Simultaneously with the cutting, a mold (not shown) is pressed against the laminated material 10 to form the body fold line 30 and the auxiliary fold line 31 as ruled lines. Next, in the step (b), the cut-out body blank 3 'is rounded into a cylindrical shape, and both end portions 3a' are bonded to each other.

  On the other hand, in the step (c), the laminate 10 is cut using a cutting machine (not shown) to cut the top blank 4 'having a circular outline. Simultaneously with the cutting, the laminated material 10 is punched with a punching blade (not shown) having a predetermined shape to form the opening 21. Note that the cutting machine and the laminated material 10 are oriented so that the longitudinal direction of the opening 21 (vertical direction in FIG. 8) is in the same direction as the paper grain PG of the paper base material 11 that is a component of the laminated material 10. . As is well known, the paper grain PG is the flow direction of pulp fibers. In the step (d), the cut top blank 4 'is sandwiched between an upper die 40 and a lower 41 of a press machine (not shown), and a folding line configured as a half cut portion with respect to the top blank 4'. 25 and tear line 26 are formed. The tear line 26 is formed to extend in the same direction as the longitudinal direction of the opening 21, that is, in the same direction as the paper grain PG. The lower die 41 is provided with cutting edges 41 a corresponding to the respective sizes of the bending line 25 and the tear line 26. In the step (e), the circular protective member 28 is attached to the top blank 4 'by a heat seal method so that the cut ends of the folding line 25 and the tear line 26 are covered. Then, the lid tape 22 is affixed to the surface (outer surface) opposite to the surface to which the protection member 28 is affixed so that the opening 21 is closed. In the step (f), a molding process for bending the outer peripheral edge 4a ′ of the top blank 4 ′ downward is performed.

  In the step (g), a bottom blank 5 ′ having a circular outline is cut out from the laminated material 10 using a cutting machine (not shown). In the step (h), a molding process for bending the outer peripheral edge 5a 'of the bottom blank 5' downward is performed. The steps (a) and (b), steps (c) to (f), and steps (g) and (h) described above can be performed in parallel. Further, a laser may be used instead of the cutting blade for forming the bending line 25 and the tear line 26. In this case, a half cut can be formed even after the paper container is molded, and the degree of freedom in the manufacturing process is increased.

  In step (i), the end of the body blank 3 'is folded upward in the figure so that the end of the top blank 4' is wrapped in the end of the body blank 3 '. Then, a rotating circular mold (not shown) is pressed against the folded portion from the inside in the radial direction and is crimped. After the body blank 3 'and the top blank 4' are combined in this step (i), a predetermined amount of beverage as a content is injected in a beverage filling machine (not shown) in the direction shown. When the beverage injection is completed, the process proceeds to step (j).

  In step (j), the bottom blank 5 'is attached to the trunk blank 3' in the same manner as in step (i). That is, the end of the body blank 3 'is folded downward in the figure so that the end of the bottom blank 5' is wrapped in the end of the body blank 3 '. Then, a rotating circular mold (not shown) is pressed against the folded portion from the inside in the radial direction and is crimped. Then, the paper container 1 filled with the beverage is completed by sticking the sachet 7 (FIG. 1) in which the straw 6 is accommodated to the trunk 3.

  About the paper container 1 manufactured by said method, what filled water as a content was created, and it confirmed that there was no water leak. After the confirmation, assuming that the contents were consumed, water was discharged to reduce the volume. That is, when the upper part of the paper container 1 is crushed, the top part 4 is destroyed as in the case shown in FIG. 6, and then the volume can be reduced similarly to the state shown in FIGS. 7A to 7C. It was.

  According to the paper container 1 described above, as shown in FIG. 7A, the top part 4 can be destroyed and the upper end of the body part 3 can be flattened by volume reduction after use. Therefore, it can be avoided that both the top part 4 and the bottom part 5 remain without being destroyed in a state in which the body part 3 is crushed by the volume reduction operation, and thus sufficient volume reduction is possible. Further, since the end portions 25a and 26a of the folding line 25 and the tear line 26 communicate with the opening 21 in the paper container 1, the folding line 25 is triggered by the opening 21 in volume reduction work after use. Thus, the top 4 is reliably bent and the top 4 is reliably torn along the tear line 26. Thereby, the workability of the volume reduction work is improved. Further, since the tear line 26 extends in the same direction as the paper grain PG (see FIG. 8), the top part 4 is easily torn along the tear line 26, so that the top part 4 can be easily and reliably removed in the volume reduction operation. Can be destroyed.

  Further, since the paper container 1 is provided with the body fold line 30 in the body part 3, the top part 4 is bent along the fold line 25 and is also torn along the tear line 26 and destroyed. As shown in FIGS. 7A to 7C, the body part is bent along the body part fold line 30 located on the extension line of the fold line 25 of the top part 4. Thereby, the trunk | drum 3 can be crushed flat easily with the top part 4 in the volume reduction operation | work. And since the auxiliary | assistant fold line 31 is provided in the trunk | drum 3, when the trunk | drum 3 is bent along the auxiliary | assistant fold line 31 in the volume reduction operation | work, it shows to FIG. 7B and FIG. 7C. The bottom portion 5 can be placed along the body portion 3 that has been flattened. Therefore, the overall thickness of the paper container 1 after volume reduction can be reduced.

  This invention is not limited to said form, You may implement with a various form. The paper container of the said form is covered with the dissimilar material from which both surfaces of a paper base material differ from paper as the raw material. However, the material of the paper container may be any configuration as long as it includes paper. The shape of the paper container is not limited to the cylindrical shape as in the above embodiment. Therefore, as long as the top portion and the bottom portion exist, the shape of the paper container can be implemented in a three-dimensional shape such as a truncated cone shape or a rectangular parallelepiped shape.

  The content is not limited to a liquid such as a beverage, but may be a solid such as a confectionery or a gel-like product having an intermediate property between a solid and a liquid. The extraction part may be provided on either the top part or the bottom part as long as the folding line and the tear line are formed at the part where the extraction part is provided. Moreover, as long as a fold line and a tear line are provided in the part where the extraction part is provided, the present invention may be implemented in a form in which the body fold line or the auxiliary fold line does not exist in the body part.

  Although the said form includes the opening part which an extraction part penetrates a top part, the shape and position of an opening part are not restricted to the thing of illustration. For example, as shown in FIG. 9, a circular opening 21 'is formed in the top 4, and each end 25a, 26a of the folding line 25 and tear line 26 communicates with the opening 21'. Can also be implemented.

  In addition, it is not an essential requirement of the present invention that the extraction portion includes an opening that penetrates the top or bottom. For example, as illustrated in FIG. 10, the take-out portion 50 can be configured such that two half-cut portions 51 that are cut halfway in the thickness direction of the top portion 4 intersect. And you may affix the cover seal | sticker 52 so that the cut end of each half cut part 51 may be covered. By providing the half cut portion 51, the strength of the portion is partially reduced. Therefore, by applying a force to the half cut portion 51, the extraction portion 50 can be easily opened. In the form of FIG. 10, each half-cut portion 51 is cut from the outside of the container, and the bending line 25 and the tear line 26 are cut from the inside of the container. The depth of cut of each half-cut portion 51 is formed deeper than the depth of cut of the folding line 25 and the tear line 26. Also in the form of FIG. 10, in the volume reduction operation after use, the unsealed take-out portion 50 becomes a trigger, and the top portion 4 is bent along the fold line 25 and is also torn along the tear line 26. Therefore, the upper end of the body portion 3 can be flattened in the same manner as the paper container 1 described above.

  Configuring the fold line and the tear line as a half-cut portion is only an example. For example, the folding line can be constituted by a ruled line, and the tear line can be constituted by a half cut part. In addition to configuring the fold line or tear line with a half cut part or a ruled line, a plurality of cuts penetrating in the thickness direction continuously exist leaving the remaining part, or in the middle of the thickness direction It can also be constituted by a half-cut perforation in which a plurality of cuts are continuously present leaving a remaining portion. Note that the number of bend lines and tear lines is not limited and may be plural or single.

  It is not essential to attach a protective member to each side of the fold line and tear line. Depending on the type and properties of the contents stored in the paper container, the protection member may be omitted.

(Comparative example)
FIG. 11 shows a comparative example for the present invention. Hereinafter, the same reference numerals in FIG. 11 denote the same components as those in the above embodiment, and the description of the common components will be omitted or simplified. As can be seen from FIG. 11, in the paper container 1 ′ according to the comparative example, only the tear line 26 is formed on the top portion 4, and the folding line 25 of FIG. 1 does not exist. The configuration of the tear line 26 of the paper container 1 'is the same as that of the paper container of FIG. That is, the tear line 26 is configured as a half-cut portion that is cut halfway in the thickness direction of the top portion 4, and the end portion 26 a communicates with the opening 21. A plurality of paper containers 1 ′ shown in FIG. 11 were prepared, and volume reduction work was performed on each paper container 1 ′ in the same manner as the paper containers 1 shown in FIG. As a result, the top part 4 is not torn along the tear line 26 and the top part 4 is bent, and the upper part of the body part 3 cannot be crushed flat enough. Accordingly, it was confirmed that the folding line 25 of the paper container 1 in FIG. 1 has an effect of surely promoting the tearing of the top portion 4 along the tear line 26. That is, the superiority of providing the tear line 26 together with the folding line 25 on the top 4 was confirmed.

DESCRIPTION OF SYMBOLS 1 Paper container 3 Body part 4 Top part 5 Bottom part 20 Extraction part 21, 21 'Opening part 25 Folding line 25a End part 25b Cut edge 26 Tear line 26a End part 26b Cut part 30 Body folding line 31 Auxiliary folding line 50 Extracting part 51 Half Cut part

Claims (7)

In a paper container having a cylindrical body part, a top part provided at the upper end of the body part, and a bottom part provided at the lower end of the body part, and the contents stored inside,
Provided on either the top or the bottom and can be opened to take out the contents to the outside, and provided on either the top or the bottom provided with the take-out When the force in the direction perpendicular to the thickness direction is applied to either the top or the bottom where the take-out portion is provided in a state where the take-out portion is opened, the take-out portion is provided. A fold line configured to bend the top or the bottom, and a fold line provided in either the top or the bottom provided with the take-out portion, and the take-out portion being opened. A paper container comprising: a tear line that is configured such that the top part or the bottom part is torn when the top part or the bottom part is folded along, and extends in a direction that intersects the folding line. The extraction portion includes an opening that penetrates the top or the bottom,
The paper container according to claim 1, wherein each end of the fold line and the tear line communicates with the opening.   The paper container according to claim 1, wherein the take-out part includes a half-cut part that is cut halfway in the thickness direction of the top part or the bottom part. Either the top part or the bottom part provided with the take-out part is made of paper with a paper texture that is the flow direction of pulp fibers,
The paper container according to claim 1, wherein the tear line extends in the same direction as the paper grain. The body part is provided with a body part fold line extending in the vertical direction and configured to bend the body part when a force is applied to the body part,
The paper container according to any one of claims 1 to 4, wherein the body part fold line is located on an extension line of the fold line in the radial direction.   The body part is configured such that when the body part is bent along the body part fold line, the body part is bent in a lateral direction, and the auxiliary fold line extends in a direction crossing the body part fold line. The paper container according to claim 5 provided with. Each of the bend line and the tear line is configured as a half-cut part that is cut halfway in the thickness direction of the top part or the bottom part,
Either one of the top part or the bottom part is provided with a film-like protective member attached so as to cover the cut cut in the half-cut part. The paper container according to one item.

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