Bottle structure

Abstract

To provide a bottle structure capable of controlling the occurrence and suppression of blow-off. [Solution] A bottle structure according to one embodiment comprises a bottle 10 for containing a carbonated beverage, and a cap for sealing the mouth of the bottle 10. The bottle 10 has a cap attachment portion 11 to which the cap is attached. The cap attachment portion 11 has a narrowed portion 11b to which the cap is crimped, and an expanded diameter portion 11c that extends upward from the narrowed portion 11b and expands in diameter relative to the narrowed portion 11b. The bottle 10 has a curved surface 11d that is located between the narrowed portion 11b and the expanded diameter portion 11c and is curved in side view. The radius of curvature of the curved surface 11d in side view is less than 1.00 mm.

Description

[Technical field]

[0001] The present disclosure relates to a bottle structure comprising a bottle and a cap. [Background technology]

[0002] Patent Document 1 describes a beverage. The beverage comprises a container having a mouth, a carbonated beverage filled in the container, and a cap with a tab attached to the mouth. The mouth includes a lip and a cap. The lip includes an upper lip portion and a lower lip portion. The upper lip portion is a portion between the top end of the container and the maximum diameter portion of the lip. The lower lip portion is a portion located between the minimum diameter portion and the maximum diameter portion of the mouth between the maximum diameter portion and the cap, and the center of curvature of the outer surface of the mouth in a longitudinal cross section is located inside the mouth. The radius of curvature of the lower lip portion in a longitudinal cross section is 1.35 mm or more. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-68530 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in a bottle structure having a bottle and a cap, a phenomenon called blow-off may occur, in which the cap flies off with force when the cap is removed from the bottle. When blow-off occurs, the cap flies off with force, so there are cases where it is undesirable to cause blow-off. On the other hand, when blow-off occurs, a popping sound is produced, and there are also cases where it is desirable to cause blow-off in order to produce this sound. Therefore, it is required to be able to control the occurrence and suppression of blow-off.

[0005] The present disclosure aims to provide a bottle structure that can control the occurrence and suppression of blow-off. [Means for solving the problem]

[0006] The bottle structure according to the present disclosure comprises a bottle for containing a carbonated beverage and a cap for sealing the mouth of the bottle. The bottle has a cap attachment portion to which the cap is attached. The cap attachment portion has a constricted portion to which the cap is crimped, and an expanded diameter portion that extends upward from the constricted portion and expands in diameter relative to the constricted portion. The cap has a cap body that seals the mouth of the bottle, and a tab that extends from the cap body and is pulled to remove the cap body from the bottle. The bottle has a curved surface that is located between the constricted portion and the expanded diameter portion and is curved in side view. The radius of curvature of the curved surface in side view is less than 1.00 mm.

[0007] In this bottle structure, the cap is attached to the cap attachment portion of the bottle, and the cap is crimped to the constricted portion of the cap attachment portion. The cap attachment portion has an expanded portion, which extends upward from the constricted portion and expands in diameter relative to the constricted portion. The cap has a cap body and a tab, and the cap body is removed from the bottle by pulling the tab. The bottle has a curved surface located between the constricted portion and the expanded portion, and the radius of curvature of the curved surface may be less than 1.00 mm. Since the radius of curvature of the curved surface is less than 1.00 mm, the curvature of the curved surface can be increased, so that even if the internal pressure is equal to or greater than a predetermined value, the crimping force of the cap on the curved portion and the constricted portion can be increased to suppress the occurrence of blow-off. The radius of curvature of the curved surface may be 1.00 mm or more. Since the radius of curvature of the curved surface is 1.00 mm or more, the momentum of the cap when removing the cap from the bottle when the internal pressure is within a predetermined range can be increased, so that blow-off can occur. Therefore, the occurrence and suppression of blow-off can be controlled. Effect of the Invention

[0008] According to the present disclosure, the occurrence and suppression of blow-off can be controlled. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a side view showing an example of a bottle structure according to an embodiment. [Diagram 2] FIG. 2 is a side view of an example cap. [Diagram 3] FIG. 3 is a plan view showing the cap of FIG. [Figure 4] FIG. 4 is a diagram showing how to remove a cap from a bottle. [Diagram 5] FIG. 5 is a vertical cross-sectional view showing an example of a cap attachment portion for a bottle. [Figure 6] FIG. 6 is a flow chart illustrating example steps of a blow-off control method according to an embodiment. [Figure 7] FIG. 7 is a diagram showing how the cap of the bottle structure according to the embodiment is opened. [Figure 8] FIG. 8 is a graph showing an example of the relationship between the internal pressure of the bottle and the liquid temperature. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the bottle structure and blow-off control method according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and duplicated descriptions are omitted as appropriate. The drawings may be partially simplified or exaggerated for ease of understanding, and the dimensional ratios and the like are not limited to those shown in the drawings.

[0011] The blow-off control method according to the present embodiment is used in a beverage container that contains a carbonated beverage. The "carbonated beverage" is, for example, a sparkling beverage. The "sparkling beverage" includes, for example, a gas-containing fermented beverage, and is a beverage that has a foaming characteristic in which a layer of foam is formed on the liquid when poured into a beverage container, and a foam retention characteristic in which the formed foam is maintained for a certain period of time or more. The sparkling beverage may be a beer-taste beverage. Beer-taste beverages include beverages that taste like beer and beverages that give the drinker the sensation of drinking beer. A beer-taste beverage with an alcohol content of 1 v / v% or more is also called a beer-taste alcoholic beverage.

[0012] In this embodiment, a beer-taste beverage refers to a beverage that has a beer-like flavor. Examples of beer-taste beverages include, but are not limited to, those classified as beer, happoshu, and other sparkling alcoholic beverages as defined in Article 3 of the Liquor Tax Act (Act No. 6 of 1953). In addition, examples of beer-taste beverages include beverages and soft drinks (e.g., non-alcoholic beer-taste beverages) that do not belong to the sparkling alcoholic beverages under the Liquor Tax Act. The beer-taste beverages according to the present disclosure are not limited to those exemplified above. The "sparkling beverage" may be a beverage other than a beer-taste beverage.

[0013] A "beverage container" is a container in which a carbonated beverage is contained. For example, the beverage container is a bottle, a can, a plastic bottle, or a barrel. An example in which the beverage container is a bottle 10 will be described below. FIG. 1 is a diagram showing a bottle structure 1 as an example. As shown in FIG. 1, the bottle structure 1 includes a bottle 10 that contains a carbonated beverage and a cap 20 that seals the mouth of the bottle 10. A "carbonated beverage" is a beverage that contains carbon dioxide gas. A "beverage" refers to a drinkable liquid. "Carbonated beverages" include alcoholic beverages such as beer, chuhai, and happoshu, as well as non-alcoholic soft drinks such as soda and cider.

[0014] Fig. 2 is a side view showing an example of the cap 20. As shown in Figs. 1 and 2, the cap 20 has a cap body 21 that seals the mouth of the bottle 10, and a tab 22 extending from the cap body 21. The tab 22 is a portion that is pulled upward by, for example, a finger. The tab 22 removes the cap body 21 from the bottle 10 by being pulled. The cap 20 is made of, for example, aluminum. However, the material of the cap 20 may be tinplate, and is not particularly limited.

[0015] Fig. 3 is a plan view showing the cap 20. As shown in Figs. 2 and 3, the cap 20 is, for example, a maxi-cap. The cap body 21 is a portion that covers the mouth of the bottle 10. The cap body 21 is also called a shell. The cap body 21 has, for example, a top surface portion 21b and a side surface portion 21c that extends from the outer edge of the top surface portion 21b in a direction outward from the surface of the top surface portion 21b (for example, downward).

[0016] The shape of the cap body 21 (top surface portion 21b) in a plan view is, for example, a circular shape. The cap body 21 has a score portion 21d. The score portion 21d is also called a groove or an easy-to-break line. The score portion 21d is formed on the top surface portion 21b and the side surface portion 21c.

[0017] For example, on the top surface portion 21b, the score portion 21d is formed in a U-shape and extends along the circumferential direction D1 of the top surface portion 21b. One end and the other end of the score portion 21d extending in a U-shape on the top surface portion 21b reach the side surface portion 21c. On the side surface portion 21c, a pair of the score portions 21d are lined up along the circumferential direction D1.

[0018] The tab 22 extends from a region 21h between a pair of score portions 21d on the side surface portion 21c of the cap body 21. As shown in Figures 2, 3, and 4, the score portions 21d are cut by pulling the tab 22 upward D4, and the cap 20 is removed from the bottle 10. The cap body 21 has, for example, notches 21j located at one end and the other end of the score portions 21d.

[0019] The notches 21j are also referred to as a flap. The notches 21j are formed at the lower end of the side surface portion 21c, and the tab 22 extends from between the pair of notches 21j. Since the cap body 21 has the pair of notches 21j, the tab 22 can be easily pulled up.

[0020] Normally, when the tab 22 is pulled up to remove the cap 20 from the bottle 10, the internal pressure of the bottle 10 is released through the notch 21j, and gas G is released. The scored portion 21d is then cut and the cap 20 is removed. However, depending on the shape of the bottle 10 and the condition of the carbonated beverage, a phenomenon called blow-off may occur in which the cap 20 jumps out with force before the internal pressure of the bottle 10 is released through the notch 21j by pulling up the tab 22.

[0021] In a blow-off, the cap 20 pops out before the score portion 21d is completely cut. It is believed that a blow-off occurs when the crimping force of the cap 20 on the bottle 10 is weak due to the shape of the bottle 10, and the internal pressure of the bottle 10 is high. Therefore, it is believed that the occurrence and suppression of blow-off can be controlled by adjusting the shape of the bottle 10 and the internal pressure of the bottle 10.

[0022] In the blow-off control method according to the present embodiment, the occurrence and suppression of blow-off is controlled by adjusting the internal pressure of the bottle 10. For example, blow-off is suppressed when the internal pressure of the bottle 10 is below a predetermined internal pressure threshold, and blow-off occurs when the internal pressure of the bottle 10 is equal to or greater than the internal pressure threshold. The "internal pressure threshold" is the internal pressure threshold of the bottle 10 that causes or suppresses blow-off.

[0023] For example, if blow-off is to occur, a notice indicating that blow-off will occur may be added to the bottle 10. The internal pressure threshold is, for example, 2.0 kgf / cm when the bottle 10 is in a stationary state. 2 Above 2.8kgf / cm 2 It may be less than 2.0kgf / cm 2 Above 2.5kgf / cm2 It is preferable that the resistance is less than 2.0 kgf / cm 2 Above 2.3kgf / cm 2 Less than or equal to (2.3kgf / cm 2 However, the value of the internal pressure threshold is not limited to the above example and can be changed as appropriate.

[0024] As shown in FIG. 1, bottle 10 has cap attachment portion 11, which is a portion to which cap 20 is attached, and body portion 12 extending downward from cap attachment portion 11. Bottle 10 is, for example, a glass bottle. As an example, body portion 12 has wide portion 12b and narrow portion 12c extending upward from wide portion 12b. For example, the width of wide portion 12b decreases toward the top. For example, narrow portion 12c has a first portion 12d extending upward from wide portion 12b, and a second portion 12f extending upward from first portion 12d.

[0025] The width of the upper end of the first portion 12d is smaller than the width of the lower end of the second portion 12f, for example. For example, the widths of the wide portion 12b and the narrow portion 12c decrease toward the top. Above, examples of the shape of the body portion 12 have been described. However, the shape of the body portion 12 is not limited to the above examples and can be changed as appropriate.

[0026] The cap attachment portion 11 is located at the upper end of the narrow portion 12c (second portion 12f). Fig. 5 is a vertical cross-sectional view showing the cap attachment portion 11 of the bottle 10. Fig. 5 shows a cross-section of the bottle 10 taken along a plane that passes through the center of the bottle 10 and extends in the vertical direction D2 and in the radial direction D3 of the bottle 10. Hereinafter, this cross-section may be referred to as the "cross-section of the bottle 10."

[0027] 1 and 5, the cap attachment portion 11 has a narrowed portion 11b to which the cap 20 is crimped, and an expanded diameter portion 11c which is expanded in diameter relative to the narrowed portion 11b. The expanded diameter portion 11c extends upward from the narrowed portion 11b. In a cross section of the bottle 10, the narrowed portion 11b is curved inwardly of the bottle 10 in a plan view as it moves away from the expanded diameter portion 11c (as it moves downward).

[0028] For example, in the expanded diameter portion 11c, the outer diameter of the bottle 10 increases toward the bottom. The bottle 10 has a curved surface 11d located between the narrowed portion 11b and the expanded diameter portion 11c. For example, the curved surface 11d extends downward from the portion of the cap attachment portion 11 where the outer diameter of the bottle 10 is greatest. The curved surface 11d is curved in a side view.

[0029] The curved surface 11d and the constricted portion 11b are portions to which the cap 20 is crimped. The cap 20 is attached to the bottle 10 by crimping the cap 20 to the curved surface 11d and the constricted portion 11b. For example, the curved surface 11d has an arc shape in a side view. In this embodiment, the crimping force of the cap 20 to the curved surface 11d and the constricted portion 11b changes depending on the value of the radius of curvature of the curved surface 11d in a side view.

[0030] For example, when the radius of curvature of curved surface 11d in side view is equal to or greater than a predetermined value, the clamping force of cap 20 on curved surface 11d and constricted portion 11b is smaller than when the radius of curvature of curved surface 11d in side view is not equal to or greater than the predetermined value. Hereinafter, the radius of curvature of curved surface 11d may be simply referred to as the "radius of curvature."

[0031] When the clamping force of the cap 20 on the curved surface 11d and the constricted portion 11b is small, the possibility of the occurrence of the blow-off described above increases. In the blow-off control method according to the present embodiment, the occurrence and suppression of the blow-off are controlled by adjusting the value of the curvature radius of the curved surface 11d in a side view.

[0032] When the curvature radius of the curved surface 11d in side view is less than a predetermined curvature radius threshold, blow-off is suppressed, and when the curvature radius of the curved surface 11d in side view is equal to or greater than the curvature radius threshold, blow-off occurs. More specifically, when the curvature radius of the curved surface 11d in side view is less than the curvature radius threshold or the internal pressure of the bottle 10 is less than the internal pressure threshold, blow-off is suppressed, and when the curvature radius of the curved surface 11d in side view is equal to or greater than the curvature radius threshold and the internal pressure of the bottle 10 is equal to or greater than the internal pressure threshold, blow-off occurs. The "curvature radius threshold" is the threshold value of the curvature radius of the curved surface 11d that causes or suppresses blow-off. The threshold curvature radius may be, for example, 0.45 mm or more and 1.50 mm or less, 0.45 mm or more and 1.40 mm or less, 0.45 mm or more and 1.30 mm or less, 0.45 mm or more and 1.20 mm or less, 0.45 mm or more and 1.10 mm or less, or 0.45 mm or more and 1.00 mm or less.

[0033] As an example, the curvature radius threshold is 1.00 mm. In this case, when the curvature radius of the curved surface 11d in side view is less than 1.00 mm, blow-off is suppressed, and when the curvature radius of the curved surface 11d in side view is 1.00 mm or more, blow-off occurs. However, the value of the curvature radius threshold is not limited to the above example and can be changed as appropriate.

[0034] Next, the steps of the blow-off control method according to this embodiment will be described with reference to Fig. 6. Fig. 6 is a flow chart showing an example of the steps of the blow-off control method. First, the above-mentioned internal pressure threshold and curvature radius threshold are determined (step of determining internal pressure threshold, step of determining curvature radius threshold, step S1). Next, it is determined whether the curvature radius of the curved surface 11d of the bottle 10 in side view is to be equal to or greater than the curvature radius threshold or less than the curvature radius threshold (step of determining the curvature radius, step S2).

[0035] It is determined whether the internal pressure of the bottle 10 should be equal to or greater than the internal pressure threshold value or less than the internal pressure threshold value (step S3, a step of determining the internal pressure of the beverage container). Note that step S3 may be performed after step S2, before step S2, or together with step S2. Then, a bottle 10 having a curved surface 11d with the radius of curvature determined above is manufactured (step S4, a step of manufacturing a beverage container).

[0036] Step S4 may be performed after step S3 or before step S3. Then, the bottle 10 is filled with carbonated beverage so that the internal pressure is the one determined above, and capped (step of filling beverage container with carbonated beverage, step S5). Through the above steps, a series of steps in the blow-off control method is completed. The blow-off control method according to this embodiment is shown as follows (1).

[0037] (1) A blow-off control method for use in a beverage container structure including a beverage container for containing a carbonated beverage and a cap for sealing the beverage container, the blow-off control method controlling the occurrence and suppression of a blow-off phenomenon in which the cap pops out before the internal pressure of the beverage container is released, comprising: determining an internal pressure threshold value, the internal pressure threshold value; determining a threshold curvature radius, which is a threshold value of a curvature radius of a curved surface located between a narrowed portion and an enlarged diameter portion of a cap attachment portion of the beverage container in a side view; determining the radius of curvature; determining an internal pressure of the beverage container; manufacturing a beverage container having the curved surface with the radius of curvature determined in the step of determining the radius of curvature; a step of filling the beverage container manufactured in the step of manufacturing the beverage container with a carbonated beverage so that the internal pressure becomes the internal pressure determined in the step of determining the internal pressure; Equipped with Blow-off control method.

[0038] In this blow-off control method, an internal pressure threshold is determined, which is a threshold value of the internal pressure of a bottle 10, which is an example of a beverage container. In addition, the bottle 10 has a curved surface 11d located between the neck portion 11b and the enlarged diameter portion 11c, and a curvature radius threshold is determined, which is a threshold value of the curvature radius of the curved surface 11d. Then, the radius of curvature and the internal pressure are determined. Thus, the occurrence of blow-off can be suppressed by setting the internal pressure below the internal pressure threshold and the radius of curvature below the curvature radius threshold. On the other hand, blow-off can be generated by setting the internal pressure to equal to or greater than the internal pressure threshold and the radius of curvature to equal to or greater than the curvature radius threshold. Thus, the occurrence and suppression of blow-off can be controlled.

[0039] The above-mentioned (1) may further have the following feature (2). (2) In the step of determining the internal pressure threshold, the internal pressure threshold is 2.0 kgf / cm 2 Above 2.8kgf / cm 2 It is defined as the following value: In the step of determining the threshold curvature radius, the threshold curvature radius is determined as a value not less than 0.45 mm and not more than 1.50 mm. The blow-off control method described in (1) above. In the above case (2), the internal pressure threshold and the curvature radius threshold can be determined as more appropriate values.

[0040] In the bottle structure 1 according to this embodiment, the cap 20 is attached to the cap attachment portion 11 of the bottle 10, and the cap 20 is crimped to the narrowed portion 11b of the cap attachment portion 11. The cap attachment portion 11 has an expanded diameter portion 11c, which extends upward from the narrowed portion 11b and expands in diameter relative to the narrowed portion 11b. The cap 20 has a cap body 21 and a tab 22, and the cap body 21 is removed from the bottle 10 by pulling the tab 22.

[0041] The bottle 10 has a curved surface 11d located between the constricted portion 11b and the expanded diameter portion 11c, and as an example, the radius of curvature of the curved surface 11d may be less than 1.00 mm. When the radius of curvature of the curved surface 11d is less than 1.00 mm, the degree of curvature of the cap at the curved surface 11d can be increased, so that the crimping force of the cap 20 against the curved surface 11d and the constricted portion 11b can be increased to suppress the occurrence of blow-off. The radius of curvature of the curved surface 11d may be 1.00 mm or more. When the radius of curvature of the curved surface 11d is 1.00 mm or more, the momentum of the cap 20 when the cap 20 is removed from the bottle 10 can be increased, so that blow-off can be generated. Therefore, the occurrence and suppression of blow-off can be controlled.

[0042] In the following, examples of the blow-off control method according to the present disclosure will be described. Note that the blow-off control method according to the present disclosure is not limited to the following examples. First, the above-mentioned bottle structure 1 was prepared, and the vertical opening force of the cap 20 was measured, and the state of the cap 20 when it was opened was photographed by a high-speed camera.

[0043] The bottles 10 were 305 mL one-way bottles, and two types were prepared: one with a curved surface 11d having a radius of curvature of 0.65 mm, and the other with a curved surface 11d having a radius of curvature of 1.00 mm. The caps 20 used were circular and had a diameter of 26 mm. As shown in FIG. 7, the vertical opening force was measured using a push-pull gauge P. More specifically, the hook P1 of the push-pull gauge P was hooked onto the tab 22, and the push-pull gauge P was pulled vertically upward to measure the vertical opening force of the cap 20.

[0044] FIG. 8 is a graph showing an example of the relationship between the internal pressure of bottle 10 and the liquid temperature of the carbonated beverage contained in bottle 10. FIG. 8 shows the case when left to stand and after shaking. After shaking refers to after bottle 10 has been vigorously shaken by hand approximately 20 times. As shown in FIG. 8, there is a correlation between the internal pressure of bottle 10 and the liquid temperature when left to stand and after shaking, and the higher the liquid temperature, the higher the internal pressure of bottle 10, and an approximate equation showing the relationship between the liquid temperature and the internal pressure of bottle 10 was obtained. In the following Examples 1 to 36, the internal pressure of bottle 10 was calculated from the liquid temperature using this approximate equation.

[0045] Table 1 shows the results of Examples 1 to 18 in which the radius of curvature of the curved surface 11d was 0.65 mm, and Table 2 shows the results of Examples 19 to 36 in which the radius of curvature of the curved surface 11d was 1.00 mm. [Table 1] [Table 2]

[0046] As shown in Table 1, in Examples 1 to 18 in which the radius of curvature of the curved surface 11d was 0.65 mm, no blow-off occurred. On the other hand, as shown in Table 2, in Examples 25, 31, and 36 in which the radius of curvature of the curved surface 11d was 1.00 mm, the internal pressure of the bottle 10 in a stationary state was 2.3 kgf / cm 2 or 2.4kgf / cm 2 Thus, the blow-off occurred when the radius of curvature of the curved surface 11d was 1.00 mm and the internal pressure of the bottle 10 was 2.3 kgf / cm 2 By doing the above, we were able to confirm the occurrence of blow-off. It was also found that the strength of the vertical opening force does not affect the occurrence of blow-off.

[0047] The above describes the embodiment and examples of the bottle structure and blow-off control method according to the present disclosure. However, the present disclosure is not limited to the above-mentioned embodiment or example. That is, it is easily recognized by those skilled in the art that the present disclosure can be modified and changed in various ways within the scope of the gist described in the claims. That is, the shape, size, number, material and arrangement of each part of the beverage container (bottle), as well as the content and order of the steps of the blow-off control method, can be appropriately changed within the scope of the above gist.

[0048] For example, in the above-mentioned embodiment, a blow-off control method for controlling the occurrence and suppression of blow-off in the bottle structure 1 has been described. However, the blow-off control method according to the present disclosure may also control the occurrence and suppression of blow-off in a beverage container structure having a beverage container other than a bottle. That is, in the blow-off control method according to the present disclosure, the target beverage container may be a can, a plastic bottle, or a barrel, and is not particularly limited. [Explanation of symbols]

[0049] 1...bottle structure, 10...bottle, 11...cap attachment portion, 11b...neck portion, 11c...expanded portion, 11d...curved surface, 12...body portion, 12b...wide portion, 12c...narrow portion, 12d...first portion, 12f...second portion, 20...cap, 21...cap main body, 21b...top portion, 21c...side portion, 21d...score portion, 21h...area, 21j...notch, 22...tab, D1...circumferential direction, D2...vertical direction, D3...radial direction, D4...upward, G...gas, P...push-pull gauge, P1...hook.

Claims

[Claim 1] A bottle containing a carbonated beverage; a cap for sealing the mouth of the bottle; Equipped with The bottle has a cap attachment portion to which the cap is attached, the cap attachment portion has a constricted portion to which the cap is crimped, and an expanded diameter portion extending upward from the constricted portion and expanding in diameter relative to the constricted portion, The cap has a cap body that seals the mouth of the bottle, and a tab that extends from the cap body and is pulled to remove the cap body from the bottle, The bottle has a curved surface that is located between the narrowed portion and the expanded diameter portion and that is curved in a side view, The radius of curvature of the curved surface in a side view is less than 1.00 mm. bottle structure.

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