JP2023148868A - Lid for paper beverage container, method for forming spout of lid for paper beverage container, and paper beverage container - Google Patents

Abstract

To provide a lid for a paper-made beverage container capable of forming a drink port facilitating drinking beverage even with no drinking straw and without being removed from the beverage container.SOLUTION: A lid 1 for a beverage container comprises a cover plate part 4 for covering an opening 3 of a beverage container 2, and a side peripheral part 5 engageable with a marginal portion 3a of the opening 3. Furthermore there are provided: a drink port formation line part 11 having a shape of a peripheral edge side of a drink port 110 of the cover plate part 4; a folding low strength part 13 facilitating folding by valley-folding between a drink port formation outer portion 11A and a drink port formation inner portion 11B when the drink port formation portions 11A, 11B surrounded with the drink port formation line part 11 are pushed in from above; and an engagement part capable of being engaged with a locking part 11c of the circumference of the drink port formation outer portion 11A in a state that the drink port formation inner portion 11B is ridge-folded, the drink port formation outer portion 11A is valley-folded and raised, and the drink port formation outer portion 11A and the drink port formation inner portion 11B are folded.SELECTED DRAWING: Figure 1

Description

The present invention relates to a lid for a paper beverage container that covers an opening of a beverage container, a method for forming a spout of the lid for a paper beverage container, and a paper beverage container equipped with this lid for a paper beverage container.

Traditionally, many beverage outlets, such as fast food restaurants and convenience stores, cover the openings of beverage containers such as plastic (synthetic resin) or paper cups with beverage container lids to make it easier to transport them. , the beverages such as juice and coffee stored inside the container are sold in a manner that prevents them from spilling from the opening.

To drink the beverage stored inside the beverage container, you can simply remove the beverage container lid and drink from the opening. There is a risk of staining the clothes of the person drinking it.

Therefore, it is often done to make it easier to drink the beverage inside the beverage container by providing a straw insertion part in the beverage container lid and inserting the attached straw (see Patent Document 1, etc.).

However, in recent years, due to the problem of ocean pollution caused by plastic waste, there has been a growing global movement to move away from plastic, and as part of this movement, there has also been a growing movement to eliminate plastic straws.

Under these circumstances, there is a demand in the market for a lid for a beverage container that can eliminate the straw and form a spout that makes it easy to drink a beverage without removing the lid. Furthermore, lids for beverage containers are also required to be made of paper.

JP 2021-14286 Publication

Therefore, the present invention was devised in view of the above-mentioned background, and its purpose is to eliminate the straw and form a drinking spout that makes it easy to drink a beverage without removing it from the beverage container. An object of the present invention is to provide a lid for a paper beverage container, a method for forming a spout of the lid for a paper beverage container, and a paper beverage container equipped with the lid for a paper beverage container.

The lid for a paper beverage container according to a first aspect of the present invention includes a cover plate portion that covers an opening of the beverage container, and an outer peripheral edge of the cover plate portion, and the cover plate portion covers the opening portion of the beverage container. A lid for a paper beverage container, comprising: a side circumferential portion that can engage with an edge of the opening of the beverage container when the beverage container is opened; A drinking spout forming line portion consisting of a low-strength portion that is lower in strength than the general portion of the cover plate portion, which is the shape of the peripheral edge side of the drinking spout for forming a drinking spout, and a drinking spout forming line portion surrounded by the drinking spout forming line portion. When the spout forming part is pushed in from above, the outer part for spout formation on the outer peripheral edge side of the cover plate part and the inner part for spout formation inside the cover plate part in the spout forming part are a low-strength part for folding that is lower in strength than the general part of the cover plate part to facilitate folding by valley folding between the parts; an engaging portion capable of engaging a locking portion on a periphery of the outside portion for forming a spout in a state where the outside portion is valley-folded and raised, and the outside portion for forming a spout and the inside portion for forming a spout are folded; The drinking spout forming outer portion has a lifting promoting portion consisting of a low-strength portion or a notch portion having lower strength than the general portion of the drinking spout forming outer portion.

A lid for a paper beverage container according to a second aspect of the present invention is characterized in that, in the first aspect, the lifting promoting portion is disposed at the center of the outside portion for forming the drinking spout.

In the lid for a paper beverage container according to a third aspect of the invention, in the first or second aspect, in the outside portion for forming a drinking spout, a general portion of the outside portion for forming a drinking spout is provided around the lifting promoting portion. It is characterized by having a lifting promotion assisting part consisting of a lower strength part or a cut part.

The lid for a paper beverage container according to a fourth aspect of the present invention is characterized in that, in any one of the first to third aspects of the invention, there is provided a lid for a paper beverage container according to any one of the first to third aspects of the invention, in which a gap between the inner end portions of the spout forming line portion of the spout forming portion of the cover plate portion is provided. , characterized in that a low-strength portion for mountain-folding, which is lower in strength than the general portion of the cover plate portion, is provided to facilitate mountain-folding of the inner portion for forming the drinking spout.

A lid for a paper beverage container according to a fifth invention is characterized in that, in the fourth invention, the low-strength portion for mountain folding is formed with perforations.

A lid for a paper beverage container according to a sixth invention is characterized in that in any one of the first to fifth inventions, the low-strength portion for folding is formed with perforations.

In the lid for a paper beverage container according to a seventh invention, in any one of the first to sixth inventions, the locking part is located at an end on an outer peripheral edge side of the cover plate part at a side part of the drinking spout forming outer part. It is characterized in that it is formed in a reduced width part of an enlarged width part, and can be engaged with the edge of the drinking spout as the engagement part.

In the lid for a paper beverage container according to an eighth invention, in any one of the first to sixth inventions, the locking part is located at an end on the outer peripheral edge side of the cover plate part at the side part of the outside part for forming the drinking spout. It is characterized in that it is formed as a notch and can be engaged with the edge of the drinking spout as the engaging part.

A lid for a paper beverage container according to a ninth invention is characterized in that, in any one of the first to eighth inventions, a plurality of the locking portions are provided.

In the lid for a paper beverage container according to a tenth invention, in any one of the first to ninth inventions, the drinking spout forming line portion includes a cut line portion, and the drinking spout forming outer portion side portion and the cover plate portion around the side portion of the outside portion for forming the spout are connected by one or more connecting portions.

A method for forming a spout of a lid for a paper beverage container according to an eleventh invention is a method for forming a spout for a lid for a paper beverage container according to any one of the first to tenth inventions, a step of pushing the portion from above with a finger, and folding the spout-forming outer portion and the spout-forming inner portion of the spout-forming portion by valley-folding with your fingers; Forming the drinking spout by a step of mountain-folding and lifting the outside portion for forming the drinking spout, and a step of engaging the locking portion on the periphery of the outside portion for forming the drinking spout with the engaging portion with a finger. Features.

A paper beverage container according to a twelfth invention is characterized by comprising a paper beverage container lid according to any one of the first to tenth inventions.

According to the present invention having the above-described configuration, it is possible to form a spout that makes it easy to drink a beverage without using a straw and without removing the straw from the beverage container.

FIG. 1 is an exploded perspective view of a paper beverage container according to Embodiment 1 of the present invention. FIGS. 2(a) and 2(b) are explanatory diagrams showing a stage before forming the spout of the method for forming the spout of a lid for a paper beverage container according to Embodiment 1 of the present invention. FIGS. 3(a) and 3(b) are explanatory diagrams showing a step in the middle of forming a spout of a method for forming a spout of a lid for a paper beverage container according to Embodiment 1 of the present invention. FIGS. 4(a) and 4(b) are explanatory diagrams showing the steps after forming the spout of the method for forming the spout of a lid for a paper beverage container according to Embodiment 1 of the present invention. FIGS. 5(a) to 5(c) are explanatory diagrams showing the stress distribution at the outside portion for forming the spout with respect to the length of the lifting promoting portion of the lid for a paper beverage container according to Embodiment 1 of the present invention It is. FIGS. 6(a) to 6(c) are explanations showing the amount of sinking at the outside portion for forming the spout with respect to the length of the lifting promoting portion of the lid for a paper beverage container according to Embodiment 1 of the present invention. It is a diagram. FIG. 7 is a schematic diagram showing the relationship among the support point, the point of action, and the point of force in the lid for a paper beverage container according to Embodiment 1 of the present invention. FIG. 8 is an enlarged view of a main part of a lid for a paper beverage container according to Embodiment 2 of the present invention. FIGS. 9(a) to 9(c) are explanations showing the stress distribution at the outside portion for forming the spout with respect to the arrangement position of the lifting promoting part of the lid for a paper beverage container according to Embodiment 2 of the present invention. It is a diagram. FIGS. 10(a) to 10(c) show the amount of sinking at the outside portion for forming the spout with respect to the arrangement position of the lifting promoting portion of the lid for a paper beverage container according to Embodiment 2 of the present invention. It is an explanatory diagram. FIGS. 11(a) to 11(d) are enlarged views of main parts of a lid for a paper beverage container according to Embodiment 3 of the present invention. FIGS. 12(a) to 12(d) show lids for paper beverage containers according to Embodiment 3 of the present invention, in which the angles of the lifting-promoting auxiliary parts added based on the low-strength parts for folding are different. FIG. 3 is an explanatory diagram showing the stress distribution at the outer portion for forming the spout with respect to the mouthpiece. FIG. 13 is an enlarged view of a main part of a lid for a paper beverage container according to Embodiment 3 of the present invention in which more lifting promotion assisting parts are provided. FIGS. 14(c) to 14(e) are views showing the main parts of lids for paper beverage containers having different arrangement patterns of lifting promoting parts according to the present invention. In the present invention, it is an enlarged view of the main part of the lid for a paper beverage container in which a locking part is formed as a notch and a connecting part is added. In the present invention, it is an enlarged view of the main part of the paper beverage container lid in which the folding low-strength part is formed into an arc shape that bulges toward the outside part for forming the drinking spout. FIG. 17 is an explanatory diagram showing a stage after forming the spout of the paper beverage container lid shown in FIG. 16;

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments to which the present invention is applied will be described with reference to the drawings.

[Embodiment 1]
First, a paper beverage container 2 according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is an exploded perspective view of a paper beverage container 2 according to an embodiment of the present invention.

As shown in FIG. 1, the paper beverage container 2 according to Embodiment 1 of the present invention includes an opening 3 having an edge 3a at its upper portion, and stores a beverage 6 such as juice or coffee therein. It is a cylindrical paper cup with a bottom that is often used for sales.

The paper beverage container 2 is used for selling beverages 6 by closing the opening 3 with the paper beverage container lid 1. Note that the beverage container whose opening 3 is closed with the paper beverage container lid 1 is not limited to the paper beverage container 2, and may be manufactured from other materials such as plastic. Furthermore, when the beverage container is made of plastic, it is preferable to use environmentally friendly biodegradable plastic.

The lid 1 for a paper beverage container is provided with a disc-shaped cover portion 4 that covers the opening 3 of the paper beverage container 2, and an outer peripheral edge of the cover portion 4. A side peripheral part 5 that can be engaged with the edge 3a of the opening 3 of the beverage container 2 when the part 4 is covered.

The cover plate part 4 includes a substantially U-shaped cut line part 12 and connecting parts 11a and 11b, which are the shape of the peripheral part of the spout 110 for forming the spout 110, on the peripheral side thereof. A spout forming line portion 11 is provided (see also FIG. 4). In addition, this spout forming line part 11 is formed by providing a perforation instead of a cut line part or by reducing the thickness by half-cutting, etc. It is also possible to provide a low-strength portion with low strength.

Moreover, when the spout forming parts 11A and 11B surrounded by the spout forming line part 11 of the cover plate part 4 are pushed in from above, the outer peripheral edge side of the cover plate part 4 in the spout forming parts 11A and 11B is A folding base having lower strength than the general part of the cover plate part 4 is used to facilitate folding by valley folding between the outer part for forming the spout 11A and the inner part for forming the spout 11B inside the cover plate part 4. A strength section 13 is provided.

Specifically, the low-strength folding portion 13 is formed with perforations. Note that the folding low-strength portion 13 can also be provided by reducing the thickness by half-cutting or the like.

Moreover, between the inner ends of the spout forming line portion 11 in the spout forming inner portion 11B of the cover plate portion 4, a cover plate portion 4 is provided to facilitate mountain folding of the spout forming inner portion 11B. A low-strength portion 14 for mountain folding that is lower in strength than the general portion is provided.

Specifically, the low-strength portion 14 for mountain folding is formed with perforations. Note that the low-strength portion 14 for mountain folding may be provided by providing ruled lines or reducing the thickness by half-cutting, or it may be provided without providing it.

Furthermore, the outside portion 11A for spout formation is valley-folded and lifted, and the locking portion 11c at the periphery of the outside portion 11A for spout formation is further folded. and an engaging portion that can engage this locking portion 11c.

Specifically, the locking portion 11c is formed at a reduced width portion of a widened portion that is formed by widening the end portion of the outer peripheral edge side of the cover plate portion 4 in the side portion of the spout forming outer portion 11A into a substantially semicylindrical shape. can be engaged using the edge of the engagement portion as an engagement portion (see also FIG. 4).

Furthermore, the outer spout forming portion 11A and the cover plate portion 4 around the side of the spout forming outer portion 11A are connected by the left and right connecting portions 11a, and the spout forming inner portion 11B The side part 11B of the inner part for forming a spout is connected to the cover plate part 4 around the side part by the left and right connecting parts 11e. This prevents it from sinking due to its own weight. Note that the number and position of these connecting portions 11a and 11e are not limited to these.

Furthermore, a lifting promoting portion consisting of a cut line provided in the spout forming outer portion 11A so as to extend from the center of the folding low-strength portion 13 toward the tip of the spout forming outer portion 11A. 11d.

In addition, the lifting promotion part 11d is not limited to a cut line, and may be implemented as a cut part of other shape or a low-strength part that is lower in strength than the general part of the spout forming outer part 11A. . Furthermore, the lifting promoting portion 11d may be placed anywhere as long as it is within the spout forming outer portion 11A.

Next, a method for forming the spout of the paper beverage container lid 1 according to Embodiment 1 of the present invention will be described with reference to FIGS. 2 to 4. 2 to 4 are explanatory diagrams showing step-by-step a method of forming a spout of a paper beverage container lid 1 according to Embodiment 1 of the present invention.

First, as shown in FIGS. 2(a) and 2(b) to 3(a) and 3(b), the inner portion 11B for forming the spout is pushed in from above with a finger F1 such as the thumb or index finger. Then, a valley fold is formed at the low strength part 13 for folding between the spout forming outer part 11A and the spout forming inner part 11B.

Furthermore, when the outside portion 11A for forming a spout is pushed inward toward the inside of the cover plate 4 with a finger F1 such as the thumb or index finger, the inside portion 11B for forming a spout is further mountain-folded, and the spout is formed. The outer portion 11A is further valley-folded at the low-strength portion 14 for mountain-folding and further lifted.

At this time, although the details will be described later, by having the lifting promoting portion 11d, stress is applied to lift the spout forming outer portion 11A as shown in FIG. 5(b), and A triangular sinking deformation occurs that attempts to lift the outer spout-forming portion 11A as shown in Fig. 2, and the tip side of the outer spout-forming portion 11A can be easily lifted upward.

Then, as shown in FIGS. 4(a) and 4(b), when the outside portion 11A for forming the spout is further pushed toward the inside of the cover plate portion 4 with the finger F1 such as the thumb or index finger, The spout forming outer part 11A and the spout forming inner part 11B are folded in a mountain fold, and the locking part 11c of the spout forming outer part 11A is the engagement part of the edge of the spout 110. and a drinking spout 110 is formed.

According to the first embodiment of the present invention, which has the above-described configuration, the spout 110 from which the beverage 6 can be easily drunk can be created without using a straw and without removing the paper beverage container lid 1 from the paper beverage container 2. can be formed.

Furthermore, in Embodiment 1 of the present invention, the paper beverage container lid 1 and the paper beverage container 2 are both made of paper, so it is possible to eliminate plastics almost completely, except for the adhesive used. can.

Furthermore, according to the method for forming the spout of the paper beverage container lid 1 according to the first embodiment of the present invention, the spout 110 of the paper beverage container lid 1 can be easily formed by the above-described simple procedure. I can do it.

In particular, in the lid 1 for a paper beverage container according to the first embodiment of the present invention, the lifting promoting portion 11d is provided in the outside portion 11A for forming the drinking spout. The spout 110 can be formed more easily.

[Example 1]
Below, the results of experimental verification conducted to confirm the effects of Embodiment 1 of the present invention will be explained. In the experimental verification, in order to confirm the difference in the lifting amount on the tip side of the mouth forming outer part 11A due to different lengths of the lifting promoting part 11d, FIGS. 5(a) to 5(c) ) and test materials of Examples 1 to 3 of the present invention shown in FIGS. 6(a) to 6(c) were prepared.

First, the stress distribution when the inner part 11B for forming the spout was pressed with the same force was verified, and the results are shown by arrows.

As shown in FIG. 5(a), in Example 1 of the present invention, in which the tip of the lifting promoting part 11d has a short length that does not even reach between the connecting parts 11a, 11a, the short lifting promoting part 11d and the Since a large amount of stress is applied toward both ends of the low-strength portion 13 in a substantially vertical direction, the spout-forming outer portion 11A is lifted more vertically.

As shown in FIG. 5(b), in the second example of the present invention, the tip of the lifting promoting portion 11d has a length that exceeds between the connecting portions 11a and 11a, but does not reach the tip of the outside portion 11A for forming a drinking spout. Since a large amount of stress is applied not only in the vertical direction but also in the horizontal direction towards the long lifting promotion part 11d and both ends of the low strength part 13 for folding, the outside part 11A for forming the spout acts in the vertical direction. Lifts in a well-balanced manner horizontally.

As shown in FIG. 5(c), in the example 3 of the present invention, in which the tip of the lifting promoting portion 11d has the maximum length reaching the tip of the outer portion 11A for forming a drinking spout, the tip is long as in the example 2 of the present invention. Since a large amount of stress is applied not only in the vertical direction but also in the horizontal direction towards both ends of the lifting promotion part 11d and the low-strength part 13 for folding, the outside part 11A for forming the spout acts in both the vertical and horizontal directions. Lifts in a well-balanced direction.

Since these stress distributions alone cannot definitively determine whether the product is good or bad, the amount of sinking of the outer spout forming portion 11A when such stress is applied was verified, and the results are shown.

As shown in FIG. 6(a), in Inventive Example 1, only a triangular sinkage amount with a narrow area connecting both ends of the low-strength folding portion 13 and the tip of the lifting promoting portion 11d was obtained. .

As shown in FIG. 6(b), in Inventive Example 2, a triangular sinkage amount with a relatively wide area connecting both ends of the low-strength folding portion 13 and the tip of the lifting promoting portion 11d is obtained. Ta.

As shown in FIG. 6(c), in Inventive Example 3, a triangular sinkage amount with a relatively wide area connecting both ends of the low-strength folding portion 13 and the tip of the lifting promoting portion 11d is obtained. Ta. However, in Example 3 of the present invention, the tip of the lifting promoting portion 11d reaches the tip of the outer spout forming portion 11A and is cut, so that the middle portion of the outer spout forming portion 11A appears bent into a mountain shape. Become.

As a result, it was found that the longer the length of the lifting promoting portion 11d, the easier the spout forming outer portion 11A is lifted up. However, if the tip of the lifting promotion part 11d reaches the tip of the outer spout-forming portion 11A and is cut off, the middle portion of the outer spout-forming portion 11A may be bent into a mountain shape. Do you get it.

Further, according to the principle of lever, as shown in FIG. If we take this as emphasis point P3, we can see the following.

The closer the fulcrum P1 is to the point of action P2, the easier it is for the mouth-forming outer portion 11A to be lifted up with a smaller force. Furthermore, the farther the force point P3 is from the point of action P2 than the fulcrum P1, the easier the spout forming outer portion 11A will be lifted up with a smaller force. That is, it is preferable to design the lid 1 for a paper beverage container according to the first embodiment with this fact in mind.

[Embodiment 2]
Next, referring to FIG. 8, a paper beverage container lid 1 according to a second embodiment of the present invention will be described. FIG. 8 is an enlarged view of main parts of a paper beverage container lid 1 according to Embodiment 2 of the present invention. The difference from the paper beverage container lid 1 according to Embodiment 1 described above is mainly the arrangement position of the lifting promotion part 11d, so this point will be mainly explained, and the same components will be given the same reference numerals. , the explanation is omitted.

In the paper beverage container lid 1 according to the second embodiment, as shown in FIG. , which is different from the paper beverage container lid 1 according to the first embodiment.

In the lid 1 for a paper beverage container according to the second embodiment, even if the lower end of the lifting promotion part 11d consisting of a cut line is spaced apart from the low strength part 13 for folding, the inner part 11B for forming a drinking spout If you press , the opening 110 of the paper beverage container lid 1 can be formed more easily by lifting up the spout-forming outer portion 11A in substantially the same way as the paper beverage container lid 1 according to the first embodiment. can do.

[Example 2]
Below, the results of experimental verification conducted to confirm the effects of Embodiment 2 of the present invention will be explained. In the experimental verification, in order to confirm the difference in the amount of lifting of the tip end side of the outer spout forming portion 11A due to the different placement positions of the lifting promoting portion 11d, FIGS. Sample materials of Examples 4 to 6 of the present invention shown in c) and FIGS. 10(a) to 10(c) were prepared.

First, the stress distribution when the inner part 11B for forming the spout was pressed with the same force was verified, and the results are shown by arrows.

As shown in FIG. 9(a), in the fourth embodiment of the present invention in which the tip of the lifting promoting part 11d does not reach between the connecting parts 11a, 11a, the lifting promoting part 11d and the folding low strength part Since a large amount of stress is applied in the substantially vertical direction toward both ends of the mouth, the mouth-forming outer portion 11A is lifted up more in the vertical direction.

As shown in FIG. 9(b), in the fifth embodiment of the present invention in which the tip of the lifting promoting part 11d is in a position spanning between the connecting parts 11a, 11a, the lifting promoting part 11d and the low strength part 13 for folding are connected to each other. Since a large amount of stress is exerted toward both ends not only in the vertical direction but also in the horizontal direction, the outer spout forming portion 11A is lifted up in a well-balanced manner in the vertical and horizontal directions.

As shown in FIG. 9(c), in the present invention example 6 in which the rear end of the lifting promoting part 11d is located beyond the connecting parts 11a, 11a toward the tip side of the spout forming outer part 11A, the present invention example 5, a large amount of stress is applied not only in the vertical direction but also in the lateral direction toward the lifting promoting portion 11d and both ends of the low-strength portion 13 for folding. lifts up in a well-balanced manner both vertically and horizontally.

In addition to these stress distributions, the amount of sinking of the mouth-forming outer portion 11A when such stress was applied was verified, and the results are shown.

As shown in FIG. 10(a), in Invention Example 4, only a triangular sinkage amount with a narrow area connecting both ends of the low-strength folding portion 13 and the tip of the lifting promoting portion 11d was obtained. .

As shown in FIG. 10(b), in Inventive Example 5, a triangular sinkage amount with a relatively wide area connecting both ends of the low-strength folding portion 13 and the tip of the lifting promoting portion 11d is obtained. Ta.

As shown in FIG. 10(c), in Inventive Example 6, a triangular sinkage amount with a relatively wide area connecting both ends of the low-strength folding portion 13 and the tip of the lifting promoting portion 11d is obtained. Ta.

In Examples 4 to 6 of the present invention, the dotted line portion on the rear end side of the lifting promoting portion 11d in FIGS. 10(a) to 10(c) was also bent.

As a result, it was found that the farther the tip of the lifting-promoting part 11d was from the folding low-strength part 13, the easier the spout-forming outer part 11A was to be lifted. However, the paper beverage container lid 1 according to the first embodiment, in which the rear end of the lifting promotion part 11d is connected to the folding low-strength part 13, is better than the paper beverage container lid 1 according to the second embodiment. It was also found that this facilitates lifting of the spout-forming outer portion 11A, making it easier to form the spout 110 of the lid 1 for a paper beverage container.

[Embodiment 3]
Next, a paper beverage container lid 1 according to a third embodiment of the present invention will be described using FIGS. 11(a) to 11(d). 11(a) to 11(d) are enlarged views of main parts of a paper beverage container lid 1 according to Embodiment 3 of the present invention. The main difference from the paper beverage container lid 1 according to the first embodiment described above is that lifting promotion assisting parts 11f are provided on the left and right sides of the lifting promotion part 11d. The same components will be given the same reference numerals and the explanation will be omitted.

In the paper beverage container lid 1 according to Embodiment 3, as shown in FIGS. 11(a) to 11(d), lifting promotion aids are provided symmetrically on the lifting promotion part 11d consisting of the cut line. This differs from the paper beverage container lid 1 according to the first embodiment in that it has a portion 11f. Note that the lifting promotion auxiliary part 11f is not limited to a cut line, and may be implemented as a cut part of another shape or a low-strength part that is lower in strength than the general part of the outside portion 11A for forming the spout. good. Furthermore, the lifting promotion assisting portion 11f may be placed anywhere as long as it is within the spout forming outer portion 11A.

In addition, in FIG. 11(a), the lifting promotion auxiliary part 11f is set at 0° with respect to the low strength part 13 for folding, and in FIG. 13 as a reference, and in FIG. 11(c), the lifting promotion auxiliary part 11f is set at 90° with respect to the low strength folding part 13, and in FIG. 11(d), the lifting promotion auxiliary part 11f is The angle is 130° based on the folding low-strength portion 13.

In the lid 1 for a paper beverage container according to the third embodiment, by adding the lifting promotion auxiliary part 11f to the lifting promotion part 11d, the lid 1 for a paper beverage container according to the third embodiment is more suitable for drinking than the lid 1 for a paper beverage container according to the first embodiment. Lifting of the mouth forming outer portion 11A is further facilitated, and the drinking spout 110 of the lid 1 for a paper beverage container can be formed even more easily. Note that, as shown in FIG. 11(a), the drinking spout 110 could not be formed only when the lifting promotion auxiliary part 11f was set at 0° with respect to the folding low-strength part 13. .

[Example 3]
Below, the results of experimental verification conducted to confirm the effects of Embodiment 3 of the present invention will be explained. In the experimental verification, in order to confirm the difference in the amount of lifting on the tip side of the outer spout forming part 11A by changing the angle of the lifting promoting auxiliary part 11f added to the lifting promoting part 11d, Test materials of Examples 7 to 9 of the present invention shown in FIGS. 11(a) to 11(d) and 12(a) to 12(d) were prepared.

First, the stress distribution when the inner part 11B for forming the spout was pressed with the same force was verified, and the results are shown by arrows.

As a result, the paper beverage container lid 1 according to Embodiment 3 promotes lifting of the mouth-forming outer portion 11A more than the paper beverage container lid 1 according to Embodiment 1, and It has been found that the spout 110 of the container lid 1 can be formed even more easily. In addition, in the paper beverage container lid 1 according to the third embodiment, the larger the angle of the lifting promotion auxiliary part 11f is with respect to the folding low strength part 13, the more the lifting of the spout forming outer part 11A becomes. It has also been found that the spout 110 of the paper beverage container lid 1 can be formed even more easily. Note that only when the lifting promotion assisting part 11f is provided at 0° with respect to the low-strength part 13 for folding, the outside part 11A for forming the spout as shown by the dotted arrow in FIG. Lifting stress was not generated and the drinking spout 110 could not be formed.

Moreover, as shown in FIG. 13, more lifting promotion assisting parts 11f may be provided.

Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

For example, in the paper beverage container lid 1 of the present invention, the lifting promoting portion 11d can be arranged in various forms as shown in FIGS. 14(a) to 14(f). .

Specifically, in the paper beverage container lid 1 shown in FIGS. 14(a) and 14(b), the lifting promoting portion 11d has a wave shape. In the paper beverage container lid 1 shown in FIGS. 14(c) to 14(e), a plurality of lifting promoting portions 11d are arranged in the vertical direction. In the paper beverage container lid 1 shown in FIG. 14(f), the lifting promoting portion 11d is disposed diagonally from one end of the folding low strength portion 13.

Moreover, in FIG. 15, in the paper beverage container lid 1 of the present invention, the locking part 11c is formed as a notch, and the edge of the drinking spout 110 is used as an engaging part to enable the engagement to be made stronger. Furthermore, an additional connecting portion 11b is provided at the tip of the outside portion 11A for forming a spout to increase the supporting force of the outside portion 11A for forming a spout before the spout 110 is formed.

Furthermore, in FIG. 16, in the paper beverage container lid 1 of the present invention, the folding low-strength portion 13 is formed into an arcuate shape that bulges toward the spout-forming outer portion 11A, so that it may be difficult to Even if the outer spout forming portion 11A is pressed instead of the spout forming inner portion 11B, the spout 110 of the paper beverage container lid 1 can be easily formed.

However, in this paper beverage container lid 1, as shown in FIG. 17, the outer spout forming portion 11A and the spout forming inner portion 11B are connected to the spout forming inner portion 11B by the left and right connecting portions 11e. The low-strength folding portion 13 is connected to the cover plate portion 4 around the side portion, and has an arcuate shape that bulges toward the spout-forming outer portion 11A side where fingers can easily hang onto it. Therefore, in this paper beverage container lid 1, it is folded not in a valley fold but in a mountain fold, and the locking part 11c is folded into the engaging part with the tip of the spout forming outer part 11A facing downward. The spout 110 is formed by engaging with the edge of the spout 110, and the form after the spout 110 is formed is also different from the paper beverage container lid 1 according to the first embodiment.

In addition, in the paper beverage container lid 1 that has taken such measures, the folding low-strength portion 13 is not limited to an arc shape, but may have a shape that bulges toward the spout forming outer portion 11A side. For example, it may be implemented in any shape.

1 Lid for paper beverage container 110 Spout 11 Line part for spout formation 11A Outer part for spout formation 11B Inner part for spout formation 11a Connecting part 11b Connecting part 11e Connecting part 11c Locking part 11d Lifting promotion part 11f Lifting promotion auxiliary part 12 Cut line part 13 Low strength part for folding 14 Low strength part for mountain folding 2 Paper beverage container 3 Opening part 3a Edge of opening part 4 Covering part 5 Side circumferential part 6 Beverage F1 Finger P1 Fulcrum P2 Point of action P3 Point of force

Claims (12)

a cover plate portion that covers an opening of the beverage container; and a cover plate portion that is provided on the outer peripheral edge of the cover plate portion so that when the cover plate portion covers the opening portion of the beverage container, the cover plate portion covers the opening portion of the beverage container. A lid for a paper beverage container, comprising: a side circumferential portion engageable with an edge;
A spout-forming spout comprising a low-strength part that is provided on the peripheral edge side of the cover plate part and has a lower strength than the general part of the cover plate part, which is the shape of the peripheral edge side of the spout for forming a drinking spout. The line part and
When the spout forming part surrounded by the spout forming line part is pushed in from above, the spout forming part on the outer periphery side of the cover plate part in the spout forming part and the inside part of the cover plate part. a low-strength part for folding that is lower in strength than the general part of the cover plate part to facilitate folding by valley folding between the inner part for forming the spout;
The spout-forming inner part is mountain-folded, the spout-forming outer part is valley-folded and raised, and the spout-forming outer part and the spout-forming inner part are folded. an engaging portion capable of engaging a locking portion on the periphery of the outside portion for forming a drinking spout;
A lid for a paper beverage container, characterized in that the outer portion for forming a drinking spout has a lifting promoting portion consisting of a low-strength portion or a notch portion that is lower in strength than a general portion of the outer portion for forming a drinking spout. The lid for a paper beverage container according to claim 1, wherein the lifting promotion part is disposed at the center of the outer portion for forming a drinking spout. The outside portion for forming a drinking spout has, around the lifting promoting portion, a lifting promoting auxiliary portion consisting of a low-strength portion or a cut portion having a lower strength than the general portion of the outside portion for forming a drinking spout. The lid for a paper beverage container according to claim 1 or 2. Between the inner end portions of the spout forming line portion in the spout forming portion of the covering plate portion, from the general portion of the cover plate portion for facilitating mountain folding of the spout forming inner portion. The lid for a paper beverage container according to any one of claims 1 to 3, further comprising a low-strength portion for mountain folding having low strength. The lid for a paper beverage container according to claim 4, wherein the low-strength portion for mountain folding is formed with perforations. The lid for a paper beverage container according to any one of claims 1 to 5, wherein the low-strength part for folding is formed with perforations. The locking portion is formed in a reduced width portion of a widened portion of the outer circumferential edge side of the cover plate portion in the side portion of the spout forming outer portion, and the engaging portion is formed on the edge of the spout as the engagement portion. The lid for a paper beverage container according to any one of claims 1 to 6, characterized in that the lid is engageable. The locking portion is formed as a notch in an end portion of the outer peripheral edge side of the cover plate portion in the side portion of the outside region for forming the drinking spout, and is capable of engaging with the edge of the drinking spout as the engaging portion. The lid for a paper beverage container according to any one of claims 1 to 6, characterized in that: The lid for a paper beverage container according to any one of claims 1 to 8, wherein a plurality of the locking portions are provided. The spout forming line portion includes a cut line portion,
Claims 1 to 3, characterized in that the side portion of the outside portion for forming the spout and the cover plate portion around the side portion of the outside portion for forming the spout are connected by one or more connecting portions. 9. The lid for a paper beverage container according to any one of Item 9. A method for forming a spout of a lid for a paper beverage container according to any one of claims 1 to 10, comprising:
a step of pushing the mouth-forming part from above with a finger;
a step of folding the spout-forming outer part and the spout-forming inner part of the spout-forming part by valley-folding with fingers, and mountain-folding and lifting the spout-forming outer part; ,
A drinking spout for a lid for a paper beverage container, characterized in that the drinking spout is formed by a step of engaging the locking portion on the periphery of the outside portion for forming the drinking spout with the engaging portion with a finger. Formation method. A paper beverage container comprising the lid for a paper beverage container according to any one of claims 1 to 10.

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