JP2014031195A - Paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new paper container having good stacking properties before use, and capable of forming a desired insulation space just before use.SOLUTION: A paper container includes: a paper container body comprising a top opening increasing the diameter toward an upper part, a paper body member having a rim part with the opening upper edge curled outward and a paper bottom plate member fixed to the bottom of the body member; and a paper cylindrical belly band fitted in the lower part of the rim part of the container body. In the paper container, a protrusion locking part is disposed on the lower edge outer circumferential surface of the body member, and a height of the cylindrical belly band is higher than the height from the lower side of the rim of the body member to the lower end of the body member. Accordingly, an insulation space can be formed between the outer wall surface of the body member and the inner wall surface of the cylindrical belly band, by locking the lower end of the cylindrical belly band to the upper end part of the protrusion locking part.

Description

  The present invention relates to a heat insulating paper container. More specifically, the present invention relates to a heat insulating paper container that deforms an outer body wrapping to provide heat insulation during use.

  Conventionally, several kinds of heat insulating containers for filling with high-temperature liquid have been put to practical use. For example, an insulated container made of expanded polystyrene has been used for this purpose. This is manufactured by pouring a foamed polystyrene raw material into a mold, then applying heat and pressure to foam the raw material, and taking out the molded container from the mold. The heat insulating container thus obtained is very excellent in terms of heat insulating properties. However, it has been reported that when hot water is poured into a foamed polystyrene container, a small amount of environmental hormones are eluted from the container body, adversely affecting the human body. Moreover, it is a container that needs to be reconsidered from the viewpoint of saving oil resources or incineration of waste. Furthermore, since the outer surface of the styrene foam heat insulating container is not smooth, there is also a disadvantage that the printability is poor.

  In order to overcome the drawbacks of the above-mentioned insulated polystyrene foam container, the present applicant has developed a paper insulated container as described in Patent Document 1 and put it into practical use. FIG. 10 is a partial schematic cross-sectional view of a paper heat insulating container described in Patent Document 1. As shown in FIG. 10, the paper heat insulating container 100 essentially includes a container main body 10 and a cylindrical body winding 30. The container body 10 includes a body portion 12 and a bottom plate portion 14. Both the body portion 12 and the bottom plate portion 14 are formed from paper 16, but the inside of the container body 10 is filled with liquid, so that the penetration of the liquid into the body portion 12 and the bottom plate portion 14 is prevented. In addition, a thermoplastic synthetic resin film 18 (for example, polyethylene, polystyrene, nylon, polypropylene, polyethylene terephthalate, or the like) is laminated on the inner wall surface side of both the body portion 12 and the bottom plate portion 14. Instead of the thermoplastic synthetic resin film, an aluminum foil can be laminated. Such liquid-permeable paper cups themselves are well known to those skilled in the art. At the upper end of the body part 12 of the container main body 10, there is a lip part 3 formed by curling the upper part of the body member toward the outside of the container. A plurality of curled portions 36 that are curled inward are provided at predetermined intervals along the inner periphery of the lower end portion of the cylindrical body winding 30. That is, the curled portion 36 does not exist continuously over the entire circumference inside the lower end portion of the cylindrical body winding 30, but exists partially or intermittently. As a result, a vent hole 54 is formed in the lower end portion 34 of the cylindrical body winding so as to communicate with the heat insulating space 56 formed between the container body and the cylindrical body winding. The cylindrical body winding 30 has a size or an inner diameter in which the inner surface of the upper end is in contact with the outer wall surface just below the lip 3 of the container body 10 and the curled portion 36 at the lower end of the cylindrical body winding is in contact with the outer wall surface below the container body. Have Therefore, when the cylindrical body winding 30 is mounted on the outer wall surface side of the body portion 12 of the container body 10, the inner surface of the upper end 32 of the tubular body winding 30 is tightly connected to the outer wall surface of the body portion 12 immediately below the container edge 3. The curl portion 36 at the lower end of the cylindrical body winding is integrated with the outer wall surface below the body portion 12 of the container body 10 with an adhesive 38. The container main body 10 is inserted into the cylindrical body winding 30 in a wedge shape. The cylindrical body winding 30 is in contact with the container body 10 directly below the lip 3 of the container body. If the main body and the adhesive 38 are bonded, the cylindrical body winding 30 will not fall off from the container main body 10. In the heat insulating container made of paper described in Patent Document 1, when the air in the heat insulating space 56 formed between the container body portion and the body winding is heated, heat exchange with the outside air is easily performed through the vent hole 54, A remarkable effect is obtained that the heat insulation effect of the outer surface of the cylindrical body winding is further improved. The insulated paper container 100 described in Patent Document 1 can be used for cold drinks as well as hot drinks. When used for cold beverages, the container 100 can be gripped while avoiding condensation that occurs on the outer wall surface of the container body 12.

  However, in the container 100 shown in FIG. 10, the heat insulating space 56 is narrower near the container mouth edge 3, and is the widest in the vicinity of the lower end portion 34 of the cylindrical body winding. For this reason, when the consumer grips the container 100 near the container lip 3, the heat insulation space 56 is recessed with a finger, and the inner surface of the cylindrical body winding 30 comes into contact with the outer wall surface of the container body body 12, and the desired heat insulation is achieved. In some cases, it may be difficult to exert the effect sufficiently. In addition, since the outer diameter of the lower end 34 of the cylindrical body winding 30 is substantially the same as or slightly larger than the inner diameter of the opening of the container body 10, when the containers 100 are stacked and stocked, There is also a problem that the storage efficiency becomes worse due to the increase in the storage efficiency.

Japanese Patent No. 39539992

  Accordingly, an object of the present invention is to provide a novel paper container that has good stackability before use and can form a desired heat insulation space immediately before use.

  In order to solve the above-mentioned problems, the present invention provides a paper cylinder member having an opening at the top, an opening at the top, and a lip that curls the upper end of the opening outward. A paper container main body comprising a paper bottom plate member fixed to the bottom of the body member, and a paper cylindrical body winding attached to a lower portion of the lip of the container main body, the outer peripheral surface of the lower end of the body member A protrusion locking portion is disposed above, and the height of the cylindrical body winding is higher than the height from the lower side of the mouth edge of the body member to the lower end portion of the body member, and the lower end portion of the cylindrical body winding is A paper container is provided in which a heat insulation space can be formed between the outer wall surface of the trunk member and the inner wall surface of the cylindrical body winding by being engaged with the upper end portion of the protrusion locking portion.

  As an embodiment of the present invention, a plurality of through slits can be provided in the cylindrical body winding.

  As an embodiment of the present invention, the through slit is a slit perpendicular to the height direction of the cylindrical body winding.

  As an embodiment of the present invention, the through slit is a slit inclined with respect to the height direction of the cylindrical body winding.

  As an embodiment of the present invention, the through slit is a straight or wavy slit.

  As an embodiment of the present invention, the protrusion locking portion has a continuous annular shape, and the lower end portion of the cylindrical body winding has a continuous arc shape.

  As an embodiment of the present invention, the protrusion locking portion is an intermittent ring shape, and a notch having substantially the same shape as the intermittent protrusion locking portion is disposed on the lower end side of the cylindrical body winding. And the upper end of the notch is locked to the upper end of the protrusion locking portion.

  As an embodiment of the present invention, slit lines can be provided at the upper and lower ends of the through slit.

  As an embodiment of the present invention, slit lines can be disposed at the upper and lower ends of the through slit, and further, slit lines can be disposed at substantially the center of the through slit.

  As an embodiment of the present invention, slit lines are arranged at the upper and lower ends of the through slit, a slit line is arranged near the upper part of one through slit, and a slit line is arranged near the lower part of the adjacent through slit. The upper slit lines and the lower slit lines can be alternately arranged.

  In the paper container of the present invention, a cylindrical body roll higher than the height of the container body is attached to the outside of the container body that expands toward the top. In this case, the outer taper of the container main body and the outer taper of the cylindrical body winding are substantially the same. Therefore, before using a paper container, a large number of paper containers are stacked to a considerable height by inserting the lower end side of the cylindrical body of another paper container into the upper opening of the container body. be able to. In other words, the paper container of the present invention has excellent storage properties before use. On the other hand, when a paper container is used, the cylindrical body winding is pushed up in the direction of the container mouth edge, and the lower end portion of the cylindrical body winding is locked to the upper end portion of the protrusion locking portion. Since the height of the cylindrical body winding is higher than the height of the container body, the cylindrical body winding is curved outward and is insulated between the inner wall surface side of the cylindrical body winding and the outer wall surface side of the body member of the container body. A space is formed. Since the cylindrical torso is curved outward in a tension state, even if the consumer holds the tubular torso, the tubular torso is rarely recessed inward. As a result, a satisfactory heat insulation effect is obtained.

It is a partial outline sectional view in the state before use of the paper container of the present invention. It is a partial outline sectional view in the state at the time of use of the paper container shown in FIG. It is a general | schematic perspective view which shows the embodiment of the protrusion latching | locking part arrange | positioned at the trunk | drum lower end outer peripheral surface of the container main body in the paper container of this invention, (a) shows a continuous annular protrusion latching part, (b ) Shows an intermittent annular protrusion locking portion, (c) shows a continuous or intermittent annular wedge-shaped protrusion locking portion, and (d) to (f) bend the lower end portion of the container body member outward. The continuous annular protrusion latching | locking part formed by is shown. It is an embodiment of the cylindrical body winding in the paper container of this invention, (a) is a schematic plan view of the blank piece for cylindrical body winding preparation, (b) is the cylindrical body winding produced from the said blank piece. FIG. It is another embodiment of the cylindrical shell winding in the paper container of this invention, (a) is a schematic plan view of the blank piece for cylindrical trunk winding preparation, (b) is the cylindrical shape produced from the said blank piece. It is a general | schematic perspective view of a trunk, (c) is a general | schematic top view of the other embodiment of the blank piece shown by (a). It is embodiment of the blank piece of the cylindrical body winding in the paper container of this invention, (a) is an embodiment by which the linear penetration slit parallel to the radial direction of the blank piece was arrange | positioned, (b) is a blank. (C) is an embodiment in which wave-shaped through slits parallel to the radial direction of the blank piece are arranged, respectively. Show. It is another embodiment of the blank piece of the cylindrical body winding in the paper container of this invention, (a) And (b) is a schematic plan view of the blank piece which arrange | positioned the score line in the upper end and lower end of a through slit. (C) is a general | schematic fragmentary sectional view of the state with which the cylindrical body wound produced from the blank piece shown by (a) and (b) was mounted to the container main body, (d) is the upper end of a through slit, It is a general | schematic top view of the blank piece which arrange | positioned the score line | wire in the lower end and substantially center part, (e) is the state which made the cylindrical main body produced from the blank piece shown by (d) attached to the container main body. It is a general | schematic fragmentary sectional view. It is another embodiment of the blank piece of the cylindrical body winding in the paper container of this invention, (a) arrange | positions a score line in the upper end and lower end of a penetration slit, and also it is intermittent shape near the upper part of one slit. Is a schematic plan view of a blank piece in which a score line is arranged and an intermittent score line 56 is arranged near the lower part of the adjacent slit, and (b) is produced from the blank piece shown in (a). It is a general | schematic fragmentary sectional view of the state which attached the cylindrical cylinder winding to the container main body. (A) is a general | schematic perspective view seen from the container bottom face side of the state which attached the cylindrical main body produced from the blank piece shown by FIG. 6 (a) to the container main body, (b) is a cylindrical main body winding. It is the general | schematic perspective view seen from the container bottom face side of the state which latched by the protrusion light vision part. It is a partial outline sectional view of a paper heat insulation container shown in patent documents 1.

  Hereinafter, preferred embodiments of the paper container of the present invention will be specifically described with reference to the drawings. Since the paper container of the present invention is a partial improvement of the paper heat insulating container described in Patent Document 1 as described above, in the following description, the paper heat insulating container described in Patent Document 1 is used. For convenience of explanation, the same reference numerals are used for the same members as the container.

  FIG. 1 is a partial schematic cross-sectional view of an example of a paper container 1 of the present invention before use, and FIG. 2 is a partial schematic cross-sectional view of the paper container 1 shown in FIG. 1 in use. . As shown in FIG. 1 and FIG. 2, the paper container 1 of the present invention consists essentially of a container body 10 and a cylindrical shell 40. The feature of the paper container 1 of the present invention is that the height (H2) of the cylindrical body roll 40 is higher than the height (H1) from directly below the lip of the body member 12 of the container body 10 to the lower end. is there.

  The body member 12 and the bottom plate member 14 of the container body 10 are both formed from paper 16, but since the container body 10 is filled with liquid, the penetration of the liquid into the body member 12 and the bottom plate member 14 is prevented. In order to prevent this, a thermoplastic synthetic resin film 18 (for example, polyethylene, polystyrene, nylon, polypropylene, polyethylene terephthalate, or a laminated film thereof) is laminated on the inner wall surface of both the body member 12 and the bottom plate member 14. Yes. Instead of the thermoplastic synthetic resin film, an aluminum foil can be laminated. Such liquid-permeable paper cups themselves are well known to those skilled in the art. At the upper end of the body member 12 of the container main body 10, there is a lip 3 formed by curling the top of the body member 12 outward of the container.

  Similar to the container body 10, the cylindrical body winding 40 is also made of paper. The feature of the paper container 1 of the present invention is that the length of the cylindrical body winding 40 is longer than the length of the container body 10. Further, another feature of the paper container 1 of the present invention is that a continuous or intermittent annular protrusion locking portion 22 is disposed on the outer wall surface of the lower end portion 20 of the body member 12 of the container body 10. is there. The thickness of the protrusion locking portion 22 is substantially the same as or slightly thicker than the thickness of the cylindrical body winding 40. Accordingly, the taper of the cylindrical body winding 40 is substantially the same as or slightly larger than the taper of the body member 12 of the container body 10. For this reason, even if the paper container 1 of the present invention is stacked before use, the stacking height of the entire container is almost the same as the height when stacking only the container main body 10 without the cylindrical body winding 40.

  The cylindrical body winding 40 can be integrated with the container body 10 by pushing or pushing the upper end portion thereof toward the lower part of the mouth edge 3 of the container body 10. Since the inner diameter of the upper end opening of the cylindrical body winding 40 is substantially the same as or almost the same as the outer diameter of the body member 10 below the lip 3 of the container body 10, the upper end portion of the cylindrical body winding 40 is connected to the container body 10. The cylindrical body winding 40 and the container main body 10 can be firmly integrated by simply pushing into the lower portion of the mouth edge 3. Alternatively, an adhesive (not shown) is applied to the outer wall surface of the barrel member 12 below the lip 3, and the cylindrical trunk 40 and the container body 10 are more firmly integrated with each other via this adhesive. It is possible to completely prevent the cylindrical body winding 40 from falling off the container body 10.

  As shown in FIG. 2, when the paper container 1 of the present invention is used, the cylindrical shell 40 is pushed up toward the container rim 3, and the lower end 42 of the cylindrical shell 40 is The upper end 24 is locked. Since the height (H2) of the cylindrical body winding 40 is higher than the height (H1) of the container body 10, the cylindrical body winding 40 is curved outward, and the inner wall surface side of the cylindrical body winding 40 and the container body 10 are curved. A heat insulating space 44 is formed between the outer wall surface of the body member 12. Since the cylindrical body winding 40 is curved outward in a tension state, even if the consumer grips the cylindrical body winding 40, the cylindrical body winding 40 is rarely recessed inward. As a result, a satisfactory heat insulation effect is obtained. The cylindrical body winding 40 may be locked to the protrusion locking portion 22 before filling the container contents, after filling, or before pouring hot water into the container immediately before use by the consumer.

  FIG. 3 is a schematic perspective view of the container body 10. The container main body 10 shown in FIG. 3A has a continuous annular protrusion locking portion 22 on the outer wall surface of the lower end portion. On the other hand, the container main body 10 shown in FIG. 3B has an intermittent annular protrusion locking portion 22 ′ on the outer wall surface of the lower end portion. It is preferable that there are two or more intermittent annular protrusion locking portions 22 ′. The protrusion locking portions 22 and 22 ′ are made of paper, and can be disposed on the outer wall surface of the lower end portion of the container body 10 by a known and common means such as an adhesive. Reference numeral 5 in FIGS. 3A and 3B denotes a side seam portion of the container body 12. In addition, the continuous annular protrusion locking portion 22 and the intermittent annular protrusion locking portion 22 ′ have a wedge-shaped cross section such that the upper end surface is flat and inclined toward the lower end as shown in FIG. It is also possible to employ a protrusion locking portion 22 ″. As another method, as shown in FIGS. 3D to 3F, continuous annular protrusion locking portions 23a to 23c are formed by bending the lower end portion of the container body 10 outward. You can also. 3D shows a state in which the bottom end of the container body 12 is bent once outward and bent into a crank shape, and the bottom plate member 14 is sandwiched inside the double bent piece. The cylindrical body winding is locked to the upper end surface of the bent portion protruding outward. In the protrusion locking portion 23b of FIG. 3 (e), when the lower end portion of the container body 12 is bent outward once and formed into a crank shape, the bent portion is bent inward in the radial direction of the container. The side wall is tapered to obtain a wedge-shaped protrusion locking portion as shown in FIG. In the protrusion locking portion 23c in FIG. 3 (f), double folding is adopted in which the lower end portion of the container body portion 12 is bent outward and upward, and then downward. The protrusion locking portion 23c has an advantage that the upper end surface of the protrusion locking portion is wider than the upper end surfaces of the protrusion locking portions 23a and 23b. The processing of the container body member 12 as shown in FIGS. 3D to 3F can be performed using a conventional paper cup manufacturing apparatus, or may be performed in a separate process. 3 (d) to 3 (f), the laminate film 18 of the container body member 10 and the bottom plate member 14 is omitted for simplicity of explanation.

  FIG. 4A is a schematic plan view of a blank 46 for forming the cylindrical body winding 40. The blank 46 needs to have approximately the same shape as the blank (not shown) of the body member 12 of the container body 10. For example, if the blank of the body member 12 is a fan shape, a rectangle, or a rectangle, the blank 46 for forming the cylindrical body winding 40 must also be a fan shape, a rectangle, or a rectangle. FIG. 4 (b) is a schematic perspective view of a cylindrical body winding 40 formed by winding a blank 46 and joining both end portions with side seam portions 48. 4 (a) and 4 (b) has a cylindrical body winding 40 having continuous annular protrusion locking portions 22, 23a-23c shown in FIGS. 3 (a) and 3 (d)-(f). Used for the container body 10.

  FIG. 5A is a schematic plan view of another embodiment of a blank for forming a cylindrical body winding. A blank 46 ′ shown in FIG. 5A has an intermittent notch 50 at its lower end surface. The shape and number of the notches 50 are not the same as the shape and number of the intermittent annular protrusion locking portions 22 ′ disposed on the outer wall surface of the lower end portion of the container body 10 shown in FIG. Don't be. FIG. 5B is a schematic perspective view of a cylindrical body winding 40 ′ formed by winding a blank 46 ′ and joining both ends at the side seam portion 48. In the case of this embodiment, the upper end of the notch 50 is locked to the upper end of the protrusion locking portion 22 '. Therefore, in the present invention, when “the lower end portion 42 of the cylindrical body winding is locked to the upper end portion 24 of the protrusion locking portion”, the upper end 42 ′ of the notch portion of the cylindrical body winding is the upper end of the protrusion locking portion 22 ′. The case where it is locked to is also included. That is, regardless of the presence or absence of the notch portion, the portion locked to the upper end of the protrusion locking portion of the container body means the lower end portion of the cylindrical body winding. As another embodiment, as shown in FIG. 5 (c), slits 51 can be provided at both ends of the upper end 42 'of the notch 50 of the cylindrical body winding 46'. The presence of the slit 51 makes it easy to lock the upper end 42 ′ of the notch portion of the cylindrical body winding to the upper end of the protrusion locking portion 22 ′.

  In order to facilitate the indentation deformation of the cylindrical body windings 40 and 40 ′ into the upper end portion 24 of the protrusion locking portions 22 and 22 ′, as shown in FIGS. 6A to 6C, a blank 46 or 46 is used. A plurality of through slits 52 having a linear shape, a diagonal shape, or a wavy shape can be disposed on the side. The number of the through slits 52 is not particularly limited. Two or more are preferable. The presence of the through slit 52 not only facilitates the push-in deformation of the cylindrical body winding 40, but is also formed when the lower ends of the cylindrical body windings 40 and 40 ′ are locked to the protrusion locking portions 22 and 22 ′. There is also an advantage that the hot air in the heat insulating space 44 can be discharged to the outside through the gap between the slits.

  FIG. 7 shows another embodiment of the blank 46 'shown in FIGS. 6 (a)-(c). As shown in FIGS. 7A and 7B, in the blank 46 ″, continuous or intermittent score lines 53 can be disposed at the upper and lower ends of the slit 52. When the cylindrical body winding 40 ″ having the score lines 53 disposed at the upper and lower ends of the slit 52 is applied to the container body 10, the upper and lower ends of the score line 53 are formed as shown in FIG. Only the cylindrical body winding portion provided with the slit 52 at the boundary is curved outward from the container, and the cylindrical body winding portion above the upper end of the score line 53 and below the lower end of the score line 53 is the container body portion. Forms a state of being in close contact with the outer wall surface. On the other hand, as shown in FIG. 7 (d), in the blank 46 ′ ″, a continuous or intermittent score line 53 is arranged at the upper and lower ends of the slit 52, and also in the substantially central portion of the slit 52. A continuous or intermittent score line 54 can also be provided. In this case, when the score line 53 at the upper end and the lower end of the slit 52 is a valley fold line, and the score line 53 at the center of the slit 52 is a mountain fold line, when this cylindrical winding 40 ′ ″ is applied to the container body 10, A state in which a curved portion having the apex at the score line 54 of the mountain fold is formed, and the cylindrical body winding in the upper part from the upper end of the score line 53 and the lower part from the lower end of the score line 53 is in close contact with the outer wall of the container body Form. The arrangement method of the score line is known to those skilled in the art.

  FIG. 8 shows yet another embodiment of the blank 46 'shown in FIGS. 6 (a)-(c). As shown in FIG. 8A, in the blank 46 ″ ″, continuous or intermittent score lines 53 are arranged at the upper and lower ends of the slit 52, and further, intermittently close to the upper portion of one slit 52. A score line 55 is disposed, and an intermittent score line 56 is disposed near the lower portion of the adjacent slit 52. Therefore, score lines 55 and score lines 56 are alternately arranged in the slits 52. Assuming that the score line 55 and the score line 56 are mountain fold lines, when this cylindrical body winding 40 ″ ″ is applied to the container body 10, the curved portion and the mountain fold score line 56 having the apex at the position of the score line 55 of the mountain fold. Curved portions having the above points as apexes are alternately formed in a staggered manner.

  9 (a) and 9 (b) are schematic perspective views seen from the bottom side of the container showing an actual use example of the paper container 1 of the present invention. As shown in FIG. 9A, a cylindrical body winding 40 ′ with a notch 50 in which a plurality of through slits 52 are arranged is mounted on the outer wall surface side of the container body 10. The cylindrical body winding 40 ′ protrudes from the lower end portion 20 of the container body 10. At this stage, there is almost no gap between the outer wall surface of the container body 10 and the inner wall surface of the cylindrical body winding 40 '. As shown in FIG. 9B, when the cutout portion 50 of the cylindrical body winding 40 ′ is locked to the protrusion locking portion 22 ′ of the container body 10, the side wall of the cylindrical body winding 40 ′ is radially outward. The heat insulating space 44 is formed between the outer wall surface of the container body 10 and the inner wall surface of the cylindrical body winding 40 ′. At that time, the through slit 52 is deformed so as to expand, and a gap is formed at the same time for communicating the heat insulating space 44 formed between the outer wall surface of the container body 10 and the inner wall surface of the cylindrical body winding 40 ′. As a result, the hot air in the heat insulating space 44 can be released to the outside.

The paper base 16 that forms the container body 10 (that is, the body member 12 and the bottom plate member 14) is not particularly limited. Since the container body 10 is on the inner side and not on the side directly held by a human hand, it is not necessary to use fresh and strong paper. As a general indication, the container body 10 preferably paper having a basis weight in the range of ^{150g / m 2 ~400g / m 2} .

The cylindrical body winding 40 is also made of paper. As the paper base composing the cylindrical body roll 40, normal cardboard (virgin paper) produced from virgin pulp can be used, but contains 80% or more of waste paper and has a basis weight of 200 g / m. Coated cardboard in the range of ^{2 to} 600 g / m ² can also be used. The use of recycled paper having such a high old paper content is not only preferable from the viewpoint of resource recycling, but also can significantly reduce the cost compared to virgin paper having the same basis weight. Further, with such recycled paper, coated cardboard is excellent when printing cosmetics are required. Virgin paper also has the advantage of high strength, and other papers with the functionality desired by the customer can be selected. However, when the basis weight is less than 200 g / m ² , there is a possibility that sufficient rigidity as a body winding is not exhibited. On the other hand, when the basis weight is more than 600 g / m ^2, not only the rigidity necessary for the body winding is exceeded, but also the workability is significantly reduced, which is uneconomical.

  As described above, in the paper container 1 of the present invention, the cylindrical body winding 40 and the container body 10 can be bonded by applying an adhesive to the outer wall surface of the body member 12 below the lip 3. In this case, as an adhesive, for example, vinyl acetate resin, ethylene / vinyl acetate copolymer resin, vinyl acetate / acrylic copolymer resin, polyvinyl alcohol resin, acrylic resin, etc. Natural product adhesives such as fu, corn starch, dextrin and natural rubber can be used. Further, a hot melt adhesive or the like can be appropriately selected and used. Such hot melt adhesives are well known to those skilled in the art. The synthetic resin adhesive is preferably used in the form of an emulsion, for example. A similar adhesive can be used for bonding the protrusion locking portion pieces disposed on the outer peripheral surface on the lower end side of the container body member.

  The container body 10 and the cylindrical body winding 40 can be easily assembled by a conventional cup manufacturing apparatus. For example, in the case of the container main body 10, first, a base paper having a thermoplastic synthetic resin film such as polyethylene laminated on one side is prepared. A blank for container trunk and a blank for bottom plate are punched out from this laminated base paper. The protrusion locking piece 22 (or 22 ') is bonded to the outer peripheral surface on the lower end side of the container body blank. Using these blanks, in a conventional cup molding machine, the container body blank should have the film laminate surface facing the inside of the container, and the bottom plate should have the film laminate surface facing the inside of the container. Assemble to 10. In the case of the cylindrical body winding 40, an unlaminated base paper is prepared. A cylinder blank of approximately the same shape as the barrel blank of the container body is punched from this base paper, formed into a hollow shape with a conventional cup forming machine, and joined at the side seam portion to produce a cylindrical drum 40 (or 40 '). . Thereafter, the lower part of the container body 10 is inserted from the upper opening of the cylindrical body winding 40, and the cylindrical body winding 40 (or 40 ′) is pushed into the lower part of the lip of the container body 10. At this time, an adhesive is used as necessary. Thus, the container main body 10 and the cylindrical body roll 40 (or 40 ') are integrated, and the paper container 1 of the present invention is obtained. In preparation for use or shipment, a large number of paper containers 1 can be stacked by inserting the lower end of the paper container 1 into the upper end opening of another paper container 1. it can.

  The paper container of the present invention can be used in an appropriate place such as a general restaurant, home, or office where high storage and heat insulation are required. The paper container of the present invention includes instant foods (eg, instant noodles, instant soup, instant tea pickles, instant miso soup, etc.) that are eaten by pouring hot water, as well as beverages (eg, Japanese tea, tea, coffee, cocoa) Etc.) can be used for a wide range of applications. In addition to cold drinks with or without ice (for example, soft drinks such as cold water and juice, alcoholic drinks such as beer, cold liquor, and wine), they can also be used for room temperature drinks. Furthermore, not only the paper container main body but also the plastic container main body can be fitted with a cylindrical body winding to obtain the same high storage property and heat insulation effect and / or non-condensing contact effect.

DESCRIPTION OF SYMBOLS 1 Paper container of this invention 3 Mouth edge part 5 Side seam part 10 of trunk | drum member Container main body 12 Drum member 14 Bottom plate member 16 Paper base material 18 Polyethylene laminated film 20 Drum lower end part 22,22 'Protrusion latching | locking part 23a, 23b, 23c Projection locking part 24 Projection locking part upper end part 40, 40 'Cylindrical body winding 42 Cylindrical body winding lower end part 42' Cylindrical winding part upper end 44 Heat insulation space 46, 46 'Cylindrical body winding blank piece 48 Side seam part 50 of cylindrical trunk winding Lower end notch part 51 of cylindrical trunk winding Both end slit 52 of cylindrical trunk winding notch part Through slit 53, 54, 55, 56 Score line

Claims (10)

A paper cylinder member having a diameter that expands toward the top, an opening at the top, and an edge that curls the upper end of the opening outward, and a paper bottom plate member that is fixed to the bottom of the cylinder A paper container body and a paper tubular body wound on the lower part of the lip of the container body, and a protrusion locking part is disposed on the outer peripheral surface of the lower end of the body member The height of the cylindrical body winding is higher than the height from the lower edge of the mouth portion of the body member to the lower end portion of the body member, and the lower end portion of the cylindrical body winding is locked to the upper end portion of the protrusion locking portion. Thus, a heat-insulating space can be formed between the outer wall surface of the body member and the inner wall surface of the cylindrical body winding. The paper container according to claim 1, wherein a plurality of through slits are disposed in the cylindrical body winding. The paper container according to claim 2, wherein the through slit is a slit perpendicular to a height direction of the cylindrical body winding. The paper container according to claim 2, wherein the through slit is a slit inclined with respect to a height direction of the cylindrical body winding. The paper container according to any one of claims 2 to 4, wherein the through slit is a linear or wave-shaped slit. The paper container according to any one of claims 1 to 5, wherein the protrusion locking portion has a continuous annular shape, and a lower end portion of the cylindrical body winding has a continuous arc shape. The protrusion locking portion has an intermittent ring shape, and a notch having substantially the same shape as the shape of the intermittent protrusion locking portion is disposed on a lower end side of the cylindrical body winding, and an upper end of the notch portion. The paper container according to any one of claims 1 to 5, wherein the upper end portion of the protrusion locking portion is locked. The paper container according to any one of claims 2 to 5, wherein slit lines are disposed at an upper end and a lower end of the through slit. The paper container according to claim 8, wherein slit lines are provided at the upper and lower ends of the through slit, and further, slit lines are provided at a substantially central portion of the through slit. Slit lines are disposed at the upper and lower ends of the through slit, and further, slit lines are disposed near the upper part of one through slit, and slit lines are disposed near the lower part of the adjacent through slit. The paper container according to claim 8, wherein the upper slit lines and the lower slit lines are alternately arranged.

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