WO2021117158A1 - Paper container - Google Patents

Abstract

According to the present invention, a paper cup (1) is made of paper and is obtained by integrally forming a cup body (2) and a lid part. The present invention is provided with: a first side surface (8) and a second side surface (9) of a side surface part (6) which face each other; and a third surface (10) and a fourth surface (11) each having a folded section (14) that can be folded inwardly. The lid section (3) is folded over the second side surface (9) to bond second bonding sections (17) with first bonding sections (15) and close the lid section (3). The paper cup (1) is made of paper and therefore does not adversely affect the environment after disposal. The closing of an opening (2a) by the lid part (3) is simple and easy, and carrying is facilitated.

Description

Paper container

The present invention relates to a paper container that can store, for example, beverages such as coffee and contents such as food, and can be sealed and opened.

Conventionally, in convenience stores and fast food stores, paper cups and plastics that are lightweight, low-cost, and convenient to carry are used as containers for coffee, tea, etc. that are used for take-out, coffee in the store, and drinking. Cups and the like are widely used. For example, the paper cup described in Patent Document 1 below is sealed by fitting a separate lid made of paper or synthetic resin into the upper opening of the container body in which the base material layer of paper is coated with a resin film layer. There is.

At these stores, the purchaser receives the container body of the cup at the counter, and the purchaser himself puts the drink into the container body and carries it with a lid attached. Alternatively, with the container body of the cup filled with a drink such as coffee, a plastic lid is attached with a top seal by, for example, an automatic machine. In addition, the clerk closes the lid and the purchaser receives the paper cup and leaves the store.
Since it is necessary to attach the lid of the cup with a lid watertightly so that the drink in the container body does not spill, plastic cups that are easy to ensure watertightness are often used in consideration of safety.

Japanese Unexamined Patent Publication No. 2016-169023

However, it may be difficult for the purchaser or the like to attach a plastic or paper lid to the opening of the container body in a short time. In addition, the lid may not be adhered accurately, in which case there is a risk that beverages or the like may spill when the purchaser moves. In addition, when the opening of the container body is closed, there is a risk that the lid may be accidentally dropped.
The plastic lid attached to the container body is highly watertight, but it was troublesome to open the lid when drinking. In addition, plastic lids are finely crushed in the process of being disposed of after use, and when they flow out into the sea, they contribute to marine pollution and environmental pollution as microplastics.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a paper container in which a lid can be easily and accurately attached to the opening of the container body and the adverse effect on the environment after disposal can be reduced. ..

The paper container according to the present invention is a paper container having a lid portion capable of closing the opening of the container body, and the container body faces the first side surface in which the lid portion is integrally formed and the first side surface. A third side surface that is formed and can close the opening in cooperation with the lid part, and a third side surface that is formed so as to face each other between the first side surface and the second side surface and has an inwardly bendable bend part, respectively. It is characterized by having a side surface and a fourth side surface.
According to the paper container according to the present invention, the contents are supplied from the opening of the container body, and the bent portions of the third side surface and the fourth side surface are bent inward to narrow the opening, and the first side surface and the second side surface are formed. The opening can be closed by bending the lid in a state of being tilted so as to be in contact with or close to each other and closing in cooperation with the second side surface, and the paper container can be assembled and carried.

Further, the bent portion is formed in a substantially pentagonal shape, and the pair of first half cut portions formed on the surface side of the container body and the pair of first half cut portions are bent so as to face each other along the outer line of the substantially pentagonal shape. A pair of bending line portions extending from the intersecting corners of the cut portions to the opening, and a pair of first portions extending from the middle corner portion of the first half cut portion toward the upper end of the bending line and formed on the inner surface side of the container body. It is preferable to have a two-half cut portion.
When bending the bent portions of the third side surface and the fourth side surface, it is easy to bend at the first half cut portion, the bending line portion, and the second half cut portion of the bent portion, so that it can be easily bent inside the container body with one touch. be able to.

Further, at the end portion forming the opening on the third side surface and the fourth side surface, a notch portion may be formed by cutting off the intersection portion between the bent line portion and the second half cut portion.
If the second half-cut part and the bent line part are gathered at one point, it is difficult to manufacture, and the paper dust is easily clogged and the die is easily worn. Prevented paper dust from accumulating.

Further, it is preferable to provide a first adhesive portion provided on the inner surface of the lid portion and a second adhesive portion provided on the surface of the second side surface and adhered to the first adhesive portion.
At the time of manufacturing a paper container, the lid portion is bent to the second side surface, and the first adhesive portion of the lid portion and the second adhesive portion of the second side surface are brought into contact with each other to adhere the lid portion and close the opening.

Further, it is preferable that locking pieces are provided at both ends of the lid portion, and locking receiving portions capable of locking the locking pieces are provided on the third side surface and the fourth side surface.
When the lid portion is bent over the second side surface, the locking pieces on both sides of the lid portion can be bent to the back side of the second side surface and locked to the locking receiving portions on the third side surface and the fourth side surface.

Further, it is preferable that the lid portion has a perforation that can open an opening at the boundary with the first side surface.
From the state where the lid is brought into close contact with the second side surface and the opening is closed, the opening can be widened to the outside by cutting the lid with a perforation to open the opening.

Further, it is preferable that a hole for inserting a straw is formed on the second side surface, and a projecting piece capable of closing the hole is formed on the lid.
When closing the opening, the hole can be closed with the lid, and when ingesting the contents of the paper container, the contents are sucked by inserting a straw by cutting open the protrusion of the lid to expose the hole. it can.

According to the paper container according to the present invention, the lid and the second side surface are opened in a state where the bent portions of the third side surface and the fourth side surface are bent so that the first side surface and the second side surface are brought into close contact with each other or in contact with each other. Can be closed. Therefore, the opening operation is simple, easy, and portable.
Moreover, since the paper container is made of paper in which the container body and the lid are integrally formed, there is no risk of dropping the lid, the closing work is easy, and the environment is not adversely affected after disposal.

It is a perspective view which shows the closed state of the paper cup by 1st Embodiment of this invention. It is a perspective view of the opened state of the paper cup shown in FIG. It is a development view of a paper cup. It is sectional drawing of the half cut in a bent part. It is sectional drawing of the Kay line in a bent part. FIG. 5 is a cross-sectional view taken along the line AA of the bent portion shown in FIG. A closed paper cup is shown, where (a) is a plan view, (b) is a left side view, (c) is a front view, (d) is a right side view, and (e) is a rear view. f) is a bottom view. It is a figure which shows the 1st closing process of a paper cup. It is a figure which shows the 2nd closing process of a paper cup. It is a figure which shows the 3rd closing process of a paper cup. It is a figure which shows the 1st opening process of a paper cup. It is a figure which shows the 2nd opening process of a paper cup. It is a perspective view of the closed state of the paper cup by 2nd Embodiment. It is a perspective view of the opened state of a paper cup. It is a development view of a paper cup. A closed paper cup is shown, where (a) is a plan view, (b) is a left side view, (c) is a front view, (d) is a right side view, and (e) is a rear view. f) is a bottom view. It is a figure which shows the 1st closing process of a paper cup. It is a figure which shows the 2nd closing process of a paper cup. It is a figure which shows the 3rd closing process of a paper cup.

Hereinafter, a paper cup as a paper container according to each embodiment of the present invention will be described with reference to the accompanying drawings.
1 to 7 show a paper cup 1 according to the first embodiment of the present invention. The paper cup 1 according to the present embodiment is a paper container for containing contents such as drinks such as coffee and tea or solids. In the paper cup 1 shown in FIGS. 1 and 2, for example, a paper cup body 2 (container body) and a lid portion 3 capable of sealing the opening 2a of the cup body 2 are integrally formed. The paper cup 1 shown in FIG. 1 has an opening 2a closed by a lid 3. The paper cup 1 shown in FIG. 2 is in an assembled state in which the opening 2a is opened to fill or supply a drink such as coffee before closing the lid 3.
In the present specification, the inside of the cup body 2 and the lid 3 is referred to as an inner surface, and the front side is referred to as a front surface.

The cup body 2 forms, for example, a side surface portion 6 in which the lower side portion 6a has a substantially truncated cone-shaped peripheral surface and the upper side portion 6b close to the opening 2a has a substantially quadrangular truncated cone-shaped peripheral surface. Further, although the substantially disk-shaped bottom portion 5 is formed separately from the side surface portion 6, it may be integrally formed. On the lower side of the side surface portion 6 shown in FIG. 3, the attachment position of the bottom portion 5 when formed as a separate body is indicated by a two-dot chain line. The side surface portion 6 has a tapered tubular shape whose diameter gradually increases from the bottom portion 5 side toward the opening 2a, and a resin film is laminated on at least the inner surfaces of the bottom portion 5 and the side surface portion 6 and the lid portion 3 made of paper, or It is coated.
In the paper cup 1 in which the lid portion 3 shown in FIG. 2 is in an open state, the upper side portion 6b having a substantially quadrangular pyramid shape of the side surface portion 6 includes the first side surface 8 in which the lid portion 3 is formed so as to project from the opening 2a. It has a second side surface 9 provided at a position facing the first side surface 8, and a third side surface 10 and a fourth side surface 11 arranged to face each other between the first side surface 8 and the second side surface 9. An opening 2a is formed at the upper ends of the first side surface 8 and the second side surface 9, the third side surface 10 and the fourth side surface 11 of the upper side portion 6b. The first side surface 8, the second side surface 9, the third side surface 10, and the fourth side surface 11 are formed to be curved along the lower side portion 6a, but may be a flat surface.

In the upper side portion 6b, substantially horizontal folding lines 13a and 13b are formed in the lower portions of the first side surface 8 and the second side surface 9, and the third side surface 10 and the fourth side surface 11 are bent in a substantially pentagonal shape, which will be described later. The portion 14 is formed. The lid portion 3 projecting from the upper end portion of the first side surface 8 is formed in a substantially quadrangular shape, and a projecting piece 3a is formed protruding from the center thereof, and a cutout piece 3b is formed protruding from one side portion. There is. On the inner surface of the lid portion 3, a first adhesive portion 15 made of an adhesive or an adhesive such as a cold seal is attached to both sides of the projecting piece 3a. As shown in FIG. 1, a linear perforation 12a is formed at the boundary between the cut-out piece 3b and the first side surface 8, and substantially U for separating the projecting piece 3a in the vicinity of the projecting piece 3a of the lid portion 3. Character-shaped perforations 12b are formed.

A hole 16 for inserting a straw or the like is formed in the central portion of the second side surface 9, and an adhesive or an adhesive such as a cold seal is formed on both sides of the hole 16 on the surface of the second side surface 9. A second adhesive portion 17 made of the above is attached. The lid 3 is bent in a state where the bent portions 14 of the third side surface 10 and the fourth side surface 11 are bent so that the first side surface 8 and the second side surface 9 are brought into contact with each other or close to each other to close the opening 2a. The adhesive portion 15 and the second adhesive portion 17 can be pressure-welded and adhered. At that time, the projecting piece 3a of the lid portion 3 can be brought into contact with the hole portion 16 of the second side surface 9 to be closed.

Next, the bent portions 14 provided on the third side surface 10 and the fourth side surface 11 will be described with reference to the development view of the paper cup 1 shown in FIG.
The bent portion 14 consists of two first folded line segments 20a formed at the boundaries of both sides of the third side surface 10 and the fourth side surface 11, and two bent portions 20a inclined in a substantially V shape from the lower end thereof in the bottom surface 5 direction. It has a pair of first half-cut portions 20 including the second fold line segment 20b of the above. The pair of first half-cut portions 20 form a home base-shaped outer line. Moreover, as shown in FIG. 4A, the first half-cut portion 20 is a half-cut line cut in a substantially V-shape in cross section with a thickness of approximately 1/2 from the surface to the inner surface.

Further, the Kay line 21 formed substantially parallel between the two first fold line segments 20a of the first half-cut portion 20 extends to the intersection of the second fold line segment 20b. As shown in FIG. 4B, the Kay line 21 forms a bent line portion in which a crease line recessed from the surface to the inner surface is formed. The Kay line 21 may be a half-cut line instead of the crease line.
Further, two diagonal second half-cut portions 22 connecting the lower end portion of each first folding line segment 20a and the upper end portion of the Kay line 21 are formed. The second half-cut portion 22 is cut from the inner surface toward the surface in a substantially V-shape in cross section with a thickness of approximately 1/2. The first half-cut portion 20 and the second half-cut portion 22 are bent in the direction of opening the substantially V-shaped half-cut portion. The Kay wire 21 is also bent in the direction of opening the recess.

As shown in FIG. 4C, the bent portion 14 shown in FIG. 1 is bent from the surface to the inner surface side at the first folded line segment 20a and the second folded line segment 20b of the first half cut portion 20, and the second half cut portion 20 is formed. It is bent from the inner surface to the surface side at 22. Further, it is bent from the surface to the inner surface side by the Kay wire 21. By bending the third side surface 10 and the fourth side surface 11 as shown in FIG. 4C, the first side surface 8 and the second side surface 9 are brought into close contact with each other or in contact with each other in the direction of closing the opening 2a at the folding lines 13a and 13b. Can be folded into.

Moreover, in the bent portion 14, the K-wire 21 and the second half-cut portion 22 are gathered so as to intersect at the upper end portion of the opening 2a on the third side surface 10 and the fourth side surface 11, and this gathering portion is substantially U-shaped. It is notched at the notch portion 24 having a shape. When the Ka-wire 21 and the second half-cut portion 22 intersect at one point, it is difficult to manufacture the die by punching, and paper dust is easily clogged and the die is easily worn. Therefore, the gathering portion is cut off at the notch portion to facilitate the production of the bent portion 14 and prevent paper dust from accumulating. As a result, it is possible to prevent the paper dust from being easily clogged and the die from being easily worn when the paper surface is punched by the die.

In the cup body 2 of the paper cup 1, in order to dent the bent portions 14 provided on the left and right third side surfaces 10 and the fourth side surface 11 with one touch by being pushed inward, the first half cut portion 20 It is important to appropriately set the angle θ between the bi-fold line segment 20b and the second half-cut portion 22. By setting the angle θ in the range of 60 ° to 150 °, the bent portion 14 can be recessed with one touch. If it is out of this range, the resistance of the third side surface 10 and the fourth side surface 11 when pushed becomes large, and it is difficult to dent with one touch. The angle θ is more preferably set in the range of 75 ° to 130 °, and the optimum value is 90 °.
In the developed view of the paper cup 1 shown in FIG. 3, a glue margin surface 26 for joining with the second side surface 9 is formed on the side portion of the fourth side surface 11.

An example of the material of the paper cup 1 is as follows. The paper cup 1 is composed of a two-layer structure of waterproof paper and PE (polyethylene terephthalate) laminated on the inner surface thereof. Alternatively, it may be composed of a three-layer structure of waterproof paper and PE laminated on its surface and inner surface. Instead of PE, PP (polypropylene) or the like or a coating resin may be used. If a resin material of bioplastic or biodegradable plastic is used instead of the resin film of PE or PP, the adverse effect on the environment can be further reduced, but it does not necessarily have to be bioplastic or biodegradable plastic.
As the resin material that covers the inner surface or the surface and the inner surface of the water-resistant paper of the paper cup 1, a plant-derived resin material or a petroleum-derived resin material can be adopted as the biodegradable plastic. Alternatively, as the resin material of the paper cup 1, various plastics such as non-biodegradable bioplastics and general-purpose plastics can be adopted.

The paper cup 1 is manufactured by punching a mount on which a resin film such as PE or a coating resin is laminated on the inner surface or surface of the water resistant paper and the inner surface with a mold.
FIG. 5 shows a six-view view of the sealed paper cup 1 according to the first embodiment. In the paper cup 1 shown in FIG. 5, (a) is a plan view, (b) is a left side view, (c) is a front view, (d) is a right side view, (e) is a rear view, and (f). Is a bottom view. The left side view and the right side view appear in the same manner.

The paper cup 1 according to the first embodiment has the above-described configuration, and then its usage method, that is, the closing method and the opening method will be described with reference to FIGS. 6A to 6C and FIGS. 7A and 7B.
At a convenience store, the paper cup 1 is provided to a customer by a clerk in an opened state as shown in FIG. 2, for example. The lid 3 stands upward on the extension of the first side surface 8 of the cup body 2. Then, for example, the purchaser throws a beverage such as coffee into the inside through the opening 2a from an automatic feeder such as coffee. After the charging is completed, as shown in FIG. 6A, by pushing each of the bent portions 14 of the third side surface 10 and the fourth side surface 11 inward, the left and right second half cut portions 22 and the left and right second half cut portions 22 with respect to the first half cut portion 20 The Kay wire 21 is bent inward with one touch.

Next, as shown in FIG. 6B, the first side surface 8 and the second side surface 9 are bent and brought close to each other along the folding lines 13a and 13b of the cup body 2 to narrow the opening 2a. In FIG. 6C, the opening 2a is closed when the upper ends of the first side surface 8 and the second side surface 9 come into contact with each other.
After that, the lid portion 3 is bent and the first adhesive portion 15 provided on the inner surface of the lid portion 3 is pressed against the second adhesive portion 17 provided on the surface of the second side surface 9 to adhere to each other. In this state, as shown in FIG. 1, the closed opening 2a of the paper cup 1 is fixed by the lid portion 3, and the hole portion 16 of the second side surface 9 is closed by the projecting piece 3a of the lid portion 3. The purchaser can carry the paper cup 1 in this state.

Next, in order to open the closed paper cup 1 and drink it, as shown in FIG. 7A, the cutout piece 3b of the lid 3 is grasped with a finger and the perforation 12a between the lid 3 and the first side surface 8 is held. To open up. Since the cutout piece 3b has a crease line, it can be folded and opened. As a result, the opening 2a portion formed at the upper ends of the first side surface 8, the second side surface 9, and the fourth side surface 11 is exposed. After that, as shown in FIG. 7B, by opening the bent portion 14 of the fourth side surface 11 to the outside, a part of the opening 2a opens in a substantially rhombus shape to serve as a drinking spout. Then, the purchaser can drink a beverage such as coffee inside from the opening 2a.
As another way of drinking, in the closed paper cup 1, the hole 16 on the second side surface 9 is exposed by bending or tearing the protrusion 3a by cutting open the perforation 12b of the lid 3. By passing a straw through the hole 16, a beverage such as coffee inside can be drunk.
In a fast food restaurant or the like, a customer fills an open paper cup 1 with a drink such as coffee and seals the lid portion 3 with the first adhesive portion 15 and the second adhesive portion 17. Can be handed to.

As described above, according to the paper cup 1 according to the present embodiment, the cup body 2 and the lid 3 are integrally formed of paper, which is merely laminated with a resin material such as PE or PP. It eliminates the need for fossil fuel-derived plastic lids and has a significantly higher proportion of paper. Therefore, even if it is discarded after use, it can be incinerated by burning it, and it is possible to reduce environmental destruction as waste plastic and floating in the sea as microplastic, and it is possible to reduce adverse effects on the environment. Further, if the resin material for laminating or coating is manufactured from bioplastic or biodegradable plastic, the adverse effect on the environment can be further reduced.

Further, since the paper cup 1 according to the present embodiment has the cup body 2 and the lid 3 integrated, there is no risk of the lid 3 being dropped when the lid 3 is attached to or detached from the opening 2a of the cup body 2, and the lid 3 is handled. Is easy. Moreover, in the open paper cup 1, after the contents such as beverages are put in, the substantially pentagonal bent portions 14 provided on the left and right third side surfaces 10 and the fourth side surfaces 11 are folded inward with one touch, and the lid portion 3 Can be easily closed by bending.

Although the paper cup 1 according to the first embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment and can be appropriately modified without departing from the spirit of the present invention. Although other embodiments and modifications of the present invention will be described below, the same reference numerals will be used for the same or similar members and parts as those in the above-described embodiments, and the description thereof will be omitted.

Next, the paper cup 1A according to the second embodiment of the present invention will be described with reference to FIGS. 8 to 12. The paper cup 1A according to the second embodiment has the same configuration as that of the first embodiment described above for the cup body 2, and is different in the configuration of the lid portion 30 integrally formed with the first side surface 8.
In this embodiment, the lid portion 30 and the second side surface 9 are not provided with adhesive portions. As shown in FIGS. 9 and 10, the lid portion 30 in the present embodiment projects upward from the first side surface 8. A projecting piece 30a for closing the hole 16 is formed in the upper center of the lid portion 30, and a substantially L-shaped locking piece 30b projecting to the outside of the first side surface 8 is formed on both side portions. .. At the upper ends of the third side surface 10 and the fourth side surface 11, locking recesses 10a and 11a for locking the tip portion 30c of the locking piece 30b are formed in the vicinity of the lid portion 30 as locking receiving portions. There is.
In the bent portion 14 shown in FIG. 10, the intersection angle θ between the Kay line 21 and the second half-cut portion 22 is set to, for example, 75 °.

In FIG. 8, the lid portion 30 is bent in a state where the first side surface 8 and the second side surface 9 are bent at the folding lines 13a and 13b until they come into contact with each other and the opening 2a is closed, and the lid portion 30 is bent. Then, when the locking pieces 30b on both sides of the lid portion 30 are folded downward, the tip portion 30c can be locked to the locking recesses 10a and 11a at the upper ends of the third side surface 10 and the fourth side surface 11. .. As a result, the opening 2a of the cup body 2 and the hole 16 of the second side surface 9 can be closed by the lid 30.
Note that FIG. 11 shows a six-view view of the closed paper cup 1A shown in FIG. In the paper cup 1A shown in FIG. 11, (a) is a plan view, (b) is a left side view, (c) is a front view, (d) is a right side view, (e) is a rear view, and (f). Is a bottom view. The left side view and the right side view appear in the same manner. Further, the paper cup 1A is made of paper, for example, made of water resistant paper, and a resin material such as PE, PP, or biodegradable plastic is laminated or coated on the inner surface side, inner surface, and surface of the water resistant paper. ..

The paper cup 1A according to the second embodiment has the above-described configuration, and then a method of using the paper cup 1A, that is, a sealing method will be described with reference to FIGS. 12A to 12C.
In the opened state of the paper cup 1A shown in FIG. 9, the lid portion 30 stands up in the shape of an extension surface of the first side surface 8 of the cup body 2. Then, for example, the purchaser puts a beverage such as coffee into the inside through the opening 2a of the cup body 2. After the charging is completed, as shown in FIG. 12A, by pushing each of the bent portions 14 of the third side surface 10 and the fourth side surface 11 inward with a finger or the like, the Kay line 21 at the center with respect to the first half cut portion 20 and The left and right second half-cut portions 22 are bent inward with one touch.

After that, as shown in FIG. 12B, the first side surface 8 and the second side surface 9 are bent at the folding lines 13a and 13b of the cup body 2 in the direction of approaching each other to narrow the opening 2a. As shown in FIG. 12C, the opening 2a is closed when the upper ends of the first side surface 8 and the second side surface 9 come into contact with each other. Then, as shown in FIG. 12C, the lid portion 30 is bent toward the second side surface 9 side in a state where the upper ends of the first side surface 8 and the second side surface 9 are brought into contact with each other to close the opening 2a.

In this state, the lid portion 30 is bent and brought into contact with the back side of the second side surface 9, so that the hole portion 16 is closed by the projecting piece 30a, and the locking pieces 30b on both sides of the lid portion 30 are bent from the upper side to the lower side. Fold it into the back surface of the second side surface 9. At this time, as shown in FIG. 8, the tip portion 30c of the locking piece 30b is locked in the locking recesses 10a and 11a of the third side surface 10 and the fourth side surface 11. In this way, the opening 2a of the paper cup 1A is closed by the lid portion 30, and the hole portion 16 of the second side surface 9 is closed by the projecting piece 30a of the lid portion 30. In this state, the purchaser can carry the paper cup 1A.

Then, in order to open the paper cup 1A and drink the beverage inside, first, one locking piece 30b of the lid portion 30 is cut open along the perforation 12b. Then, by opening the bent portion 14 of the fourth side surface 11 to the outside, a part of the opening 2a can be opened in a diamond shape to serve as a drinking spout. Then, a beverage such as coffee inside can be drunk from the opening 2a.
Further, as another way of drinking, the hole portion 16 is opened by cutting the projecting piece 30a of the lid portion 30 at the perforation 12a. By passing a straw through the hole 16, you can drink the beverage inside.

In the paper cups 1 and 1A according to the above-described embodiments, the bent portions 14 formed on the third side surface 10 and the fourth side surface 11 are formed by a substantially pentagonal outer wire, and the Kay wire 21 and the second half are formed inside. The cut portion 22 was formed. However, the bent portion 14 may be curved or bendable inward, and may be provided with an uneven Kay line or the like that is not half-cut.
Further, the hole 16 for the straw does not necessarily have to be closed by the lids 3 and 30. Separately from the lids 3 and 30, it may be sealed so that it can be opened with a seal or the like.
Further, in the bent portion 14, the gathering portion of the K-wire 21 and the two second half-cut portions 22 is cut off at the notch portion 24, but the notch portion 24 does not necessarily have to be provided. For example, the upper ends of the third side surface 10 and the fourth side surface 11 may be reached before the Kay wire 21 and the two second half-cut portions 22 are assembled.

The paper cup according to the present invention is a paper container having a lid portion that can open and close the opening of the container body, and is integrally formed with a first side surface formed on a side portion of the container body and protruding from the first side surface. It is formed so as to face the first side surface and the second side surface which is formed to face the first side surface and can open and close the opening in cooperation with the lid part, and the first side surface and the second side surface. It is characterized by having a third side surface and a fourth side surface having a bendable portion that can be bent inward.
According to the present invention, the contents are supplied into the container body through the opening of the container body, the bent portions of the third side surface and the fourth side surface are bent inward, and the first side surface and the second side surface are brought into contact with each other to bring the lid. By bending the portion, the opening can be closed in cooperation with the second side surface. Further, in order to drink or eat the contents, a part of the lid portion is removed and the bent portion is opened outward to open the opening and eat. Moreover, since the paper cup is made of paper, it is possible to reduce the adverse effect on the environment at the time of disposal.

1 Paper cup 2 Cup body 2a Opening 3, 30 Lid 3a, 30a Protruding piece 3b Cutout piece 8 First side surface 9 Second side surface 10 Third side surface 10a, 11a Locking recess 11 Fourth side surface 14 Bending part 15 First Adhesive part 16 Hole part 17 Second adhesive part 20 First half cut part 21 Kay wire 22 Second half cut part 24 Notch part 30b Locking piece 30c Tip part

Claims (7)

1. A paper container having a lid that can close the opening of the container body.
   The container body
   The first side surface on which the lid is integrally formed and
   A second side surface that is formed to face the first side surface and can close the opening in cooperation with the lid portion.
   The third side surface and the fourth side surface, which are formed to face each other between the first side surface and the second side surface and have an inwardly bendable bending portion, respectively.
   A paper container characterized by being equipped with.
2. The bent portion is formed in a substantially pentagonal shape.
   A pair of first half-cut portions formed on the surface side of the container body, which are bent and formed so as to face each other along the substantially pentagonal outer line.
   A bending line portion extending from the intersecting corners of the pair of first half-cut portions to the opening,
   A pair of second half-cut portions extending from the middle corner of the first half-cut portion toward the upper end of the bending line and formed on the inner surface side of the container body.
   The paper container according to claim 1.
3. The paper according to claim 2, wherein a notch formed by cutting off the intersection of the bent line portion and the second half-cut portion is formed at the end portion forming the opening of the third side surface and the fourth side surface. Making container.
4. The first adhesive portion provided on the inner surface of the lid portion and
   A second adhesive portion provided on the surface of the second side surface and adhered to the first adhesive portion,
   The paper container according to claim 1.
5. The first aspect of the present invention, wherein locking pieces are provided at both ends of the lid portion, and locking receiving portions capable of locking the locking pieces are provided on the third side surface and the fourth side surface. Paper container.
6. The paper container according to claim 1, wherein the lid portion is formed with a perforation capable of opening the opening at a boundary with the first side surface.
7. The paper container according to claim 1, wherein a hole for inserting a straw is formed on the second side surface, and a projecting piece capable of opening the hole is formed on the lid.

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