JP2004224364A - Double container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double container, which makes it impossible for a person to see characters or figures drawn on the interior of the container before drinking a drink, but makes it possible to see them as the person drinks. <P>SOLUTION: The double container has an outer container and an inner container, and holds a light permeable liquid. The inner container (20) is made of a light permeable member, and a space G is formed at least partly between the interior side face 10a of the outer container 10 and the exterior side face 20a of the inner container, and at least either of the characters or figures MZ are drawn on the interior side face of the outer container. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a double container, in particular, a character or figure drawn on the inside of the container cannot be seen before drinking the beverage, and the character or figure can be seen as the drink is taken. Related to a double container.
[0002]
[Prior art]
For example, when traveling by train, there are cases in which drinks such as sake in a drinking container such as a paper cup may be purchased, and inside the paper cup, information such as historic sites of local famous places may be drawn. is there.
[0003]
[Problems to be solved by the invention]
However, since the guide of the historic spot drawn on the inside of the drinking container can be seen even before drinking the beverage, there is no significant change inside the drinking container before and after drinking the beverage.
[0004]
The present invention has been made in view of the above circumstances, and the characters or graphics drawn inside the container cannot be seen before drinking the beverage, and the characters or graphics can be seen as the beverage is consumed. It is an object of the present invention to provide a double container.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is directed to a double container for containing a light-transmissive liquid having an outer container 10 and an inner container 20,
The inner container (20 in FIG. 3) is made of a light transmissive member, has a space G in at least a part between the inner surface 10a of the outer container 10 and the outer surface 20a of the inner container, and The configuration is such that at least one of a character and a figure MZ is drawn on the inner surface.
[0006]
With this configuration, when a light transmissive liquid (for example, sake) is put into the inner container, characters and / or figures drawn on the inner surface of the outer container located below the liquid level of the light transmissive liquid are output. The light is transmitted through the space between the outer container and the inner container, the light-transmitting member forming the inner container, the light-transmitting liquid contained in the inner container, and the boundary surface between the outer air layer and the material forming the respective constituents. Refraction occurs due to the difference in light refractive index.
[0007]
Due to this refraction, for example, as shown in FIGS. 4A and 4B, the light, in other words, the inside of the outer container is changed depending on the angle or the amount of the liquid that sees the liquid surface of the light transmitting liquid from outside the double container. Characters or figures drawn on the side can be made invisible.
[0008]
Next, the invention according to claim 2 is a double container according to claim 1,
The outer container has a configuration made of a light transmitting member.
In this way, the characters or figures drawn on the inner surface of the outer container made of the light-transmitting member can always be seen from the outer side surface of the double container. However, when the light-transmissive liquid is placed in a double container, when viewed from above the surface of the light-transmissive liquid, the characters drawn on the inner surface of the outer container depend on the viewing angle or the amount of the light-transmissive liquid. Or you can make the figure invisible.
[0009]
Therefore, for example, if coloring (for example, red solid color) is applied to the entire inner surface of the outer container, the double container is viewed from the outer side surface when the light transmissive liquid is contained in the double container. In some cases, the colored color can always be seen, but when viewed from above the liquid surface, the colored color can be made invisible depending on the viewing angle.
This has the effect of giving the drinker pleasure in addition to the effect simply as a container, for example, when the double container is used as a drinking container for a light-transmissive liquid beverage.
[0010]
Next, according to a third aspect of the present invention, in the double container according to the first aspect,
The outer container is configured by a non-light-transmitting member.
[0011]
In this case, the characters or figures drawn on the inner surface of the outer container made of the non-light-transmitting member are not visible from the outer side surface of the double container, but are outside the empty double container. You can see the inside of the container. However, when the light-transmissive liquid is placed in the double container, when the peeping is performed from above the liquid surface of the light-transmissive liquid, it is drawn on the inner surface of the outer container depending on the angle of the peep or the remaining amount of the light-transmissive liquid. You can make characters or figures visible or invisible.
[0012]
Next, the invention according to claim 4 is the double container according to claim 3,
A part of the outer container made of the non-light-transmitting member is configured to be made of a light-transmitting member.
[0013]
In this way, for example, as shown in FIG. 8, the effect of the inventions of claims 2 and 3 can be obtained by limiting to a part constituted by the light transmitting member of the outer container. When the heavy container is used as a drinking container, it is possible to easily draw attention of a person.
[0014]
Next, the invention according to claim 5 is the double container according to claim 2 or 4,
At least one of a character and a figure is drawn on the outer surface of the light transmitting member of the outer container.
[0015]
With this configuration, when the light transmissive liquid is placed in the double container, the characters or figures drawn on the outer surface of the light transmissive member of the outer container can always be seen from above the liquid surface. The characters or figures drawn on the inner surface of the outer container can be made invisible depending on the height of the liquid surface or the angle viewed from above the liquid surface. I can do it.
[0016]
Next, the invention according to claim 6 is the double container according to claims 1 to 5,
The space between the inner container and the outer container is configured to be filled with a light transmitting material having a smaller light refractive index than the constituent members of the inner container.
[0017]
With this configuration, the light-transmitting material filled in the space can increase the heat insulation property or the mechanical strength of the double container while securing the same effects as those of the first to fifth aspects. I can do it.
[0018]
Next, the invention according to claim 7 is the double container according to claim 6,
The light-transmitting material is air.
In this way, by performing the manufacture of the double container in air, a space by air can be easily formed between the inner surface of the outer container and the outer surface of the inner container. The configuration shown can be easily obtained. In addition, since air is a heat insulating material, it can exert a heat retaining effect (for example, securing the temperature of hot sake).
[0019]
Next, the invention according to claim 8 is a double container according to claims 1 to 7,
The character or figure is a winning result of the lottery.
In this way, for example, if a person who has purchased a double container with sake is described as a bonus winning result, the winning result can be understood only by drinking sake etc. from the double container. It can be.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the double container of the present invention will be described based on the illustrated embodiment.
(1) First Embodiment FIG. 1 is an exploded perspective view of the present embodiment, FIG. 2 is an external view in which an inner container is fitted into an outer container constituting the present embodiment, and FIG. FIG. 3B is a perspective view, FIG. 3B is a side view, and FIG. 3 is a partial cross-sectional view showing a state where the inner container is fitted into the outer container constituting the present embodiment.
[0021]
As shown in FIGS. 1 to 3, the double container DB of the present embodiment includes an outer container 10, an inner container 20, a seal lid 30, and an outer lid 40.
The outer container 10 is made of "non-light-transmitting" paper that does not transmit light, and is coated with plastic on both sides to ensure waterproofness and water repellency.
[0022]
The inner container 20 is formed by molding a transparent plastic, and has a draft at the time of molding (described later). The angle of the draft and the side angle of the outer container 10 are the same. As a material of the plastic, polyethylene terephthalate resin is preferable.
[0023]
When the double container DB is filled with a beverage such as sake, the seal lid 30 is sealed to prevent leakage of the sake and the like. As a material, an aluminum alloy sheet is preferable. Reference numeral 30a denotes a "knob" that is picked with a finger or the like when the seal lid 30 is peeled off.
The outer lid 40 is used, for example, when peeling off the seal lid 30 and drinking sake halfway, and temporarily sealing the remaining sake and the like. As a material of the outer lid 40, polyethylene terephthalate is preferable.
[0024]
Then, as shown in FIG. 3, the edge 20c of the upper surface of the inner container 20 is folded back so as to cover the edge 10b of the upper surface of the outer container 10, and the inner container 20 is fixed to the outer container 10 by heating or the like.
For example, sake ED (see FIGS. 4A and 4B) is filled in the double container DB (see FIG. 1) configured as described above and sold to customers. The customer removes the outer lid 40 and the seal lid 30 and drinks sake ED. Then, as shown in FIG. 4A, immediately after the seal lid 30 is removed, since the sake ED is sufficiently filled, the character / graphic MZ cannot be seen by the human eye I.
[0025]
However, at the stage of drinking a little more than half of the sake ED, as shown in FIG. 4B, the “figure of Mt. Fuji” becomes visible, but “Mt. The "character" remains invisible.
The "characters" include numbers, symbols, etc., in addition to characters such as kanji and Roman characters. The “graphic” includes coloring (for example, solid painting) and partial coloring.
[0026]
Hereinafter, the operation of the present embodiment will be described in detail with reference to FIGS.
FIG. 5 is a cross-sectional view taken along line AA ′ of FIG. 2B in a state where water W is filled, and FIG. 6 illustrates a refraction state of light traveling from characters / graphics drawn on the inner surface of the outer container. FIG.
As shown in FIG. 5, a space G filled with air is formed between the inner surface 10a of the outer container 10 and the outer surface 20a of the inner container 20. The inner container 20 is filled with water W. The double container filled with the water W is called a double container DB1.
[0027]
In FIG. 6, angles a to f and angle α represent the following angles, respectively.
The angle a and the angle b represent the incident angle and the refraction angle of the light traveling from the character / graphic MZ drawn on the inner surface 10a of the outer container, respectively, on the outer surface 20a of the inner container.
The angles c and d respectively represent the incident angle and the refraction angle at the point where the light reaches the boundary between the inner surface 20b of the inner container and the water W.
[0028]
The angles e and f represent the incident angle and the refraction angle, respectively, at the point where the light reaches the boundary between the water W and the air layer US above the liquid level of the water W.
The angle α is the angle of the inclination formed on the inner side surface 20b of the inner container 20 with respect to the vertical direction.
[0029]
Assuming that the refractive index of the light in the space G is n1, the refractive index of the light of the inner container 20 is n2, the refractive index of the light of the water W is n3, and the refractive index of the light of the air layer US above the water surface is n4, If the law of refraction is applied, the following equation holds.
[0030]
Sin a / Sin b = n2 / n1 (Equation 1)
Sinc / Sind = n3 / n2 (Equation 2)
Sine / Sinf = n4 / n3 (Equation 3)
E = 90 ° − (d + α) (Equation 4)
Holds.
When the thickness of the side surface of the inner container is uniform, b = c.
[0031]
As shown in FIG. 5, the inner container 20 is a cone having an opening having an inner diameter of 60 mm and a depth of 80 mm. The side surface of the inner container 20 is formed of a colorless and transparent polyethylene terephthalate resin having a thickness of 0.3 mm having a gradient of 3 ° with respect to the vertical direction from the opening toward the bottom and a refractive index of light of 1.5. is there.
[0032]
The spatial distance between the inner side surface 10a of the outer container and the outer side surface 20a of the inner container is set to 0.3 mm, and it is assumed that the air has a refractive index of 1 and is filled with air.
It is assumed that the inner container 20 is filled with water W having a refractive index of light of 1.3 to a depth of 70 mm, and characters / figures MZ are drawn on the inner side surface 10a of the outer container below the water surface.
Further, the double container DB1 is placed in the air where the refractive index of light is 1.
[0033]
The gradient of 3 ° is a draft angle of a mold when the inner container 20 is molded with plastic. This draft is for facilitating the molding operation when the inner container 20 is formed by plastic molding, and corresponds to the angle α in FIG.
[0034]
Next, in the case of the double container DB1, what kind of light emitted from the character / graphic MZ can be seen from above the water surface under what kind of conditions will be described.
[0035]
First, based on FIGS. 7A to 7C, conditions under which light traveling in water can be seen from above the water surface will be described.
In this case, "being able to be seen from above the water surface" means that the light comes out on the upper surface of the water W, and thus "the angle f is equal to or more than 0 ° and less than 90 °". f, the refractive index of water (= 1.3) and the refractive index of air (= 1) are applied to (Equation 3) to obtain about 0 ° <e <about 50.3 ° (Equation 5)
Is obtained.
[0036]
That is, since only light coming from underwater to the water surface at an angle e satisfying (Equation 5) comes out above the water surface, it can be seen from above the water surface (FIG. 7A). If the angle is greater than 0.3 °, the light is reflected on the water surface and returns to the water again, and cannot be seen from above the water surface (FIG. 7C).
In the case of FIG. 7B, the character / figure MZ can be viewed only when viewed from the light traveling direction. For example, when viewed from above, the character / figure MZ cannot be viewed.
[0037]
Next, how light emitted from the character / graphic MZ passes through the light path L will be described.
In the case of the double container DB1, when light emitted from the character / figure MZ is incident on the outer surface 20a of the inner container, the content is downward at least 3 ° below a line perpendicular to the outer surface of the inner container at the point of incidence. When the light enters the vessel, the light is refracted in a direction opposite to the direction toward the water surface, so that the light does not reach the water surface, and the light path L seen from above the water surface of the double container DB1 does not take.
[0038]
Therefore, the light emitted from the characters / graphics MZ passes through the light path L which can be seen from the outer upper surface of the double container, because the light passes between the inner surface 10a of the outer container and the outer surface 20a of the inner container. Considering the clearance and water depth,
About −3 ° <a <about 87.5 ° (Equation 6)
Is the case.
[0039]
By substituting (Equation 6) and n1 &shy; = 1, n2 = 1.5 into (Equation 1),
About -2 <b <about 41.8 ° (Equation 7)
Is obtained.
[0040]
In the case of the double container DB1, since the thickness of the inner container 20 is uniform, the angle b = c. (Equation 8)
Is obtained.
[0041]
Also, from (Equation 4) and (Equation 8), about 36.7 ° <e <about 89.3 ° (Equation 9)
Is obtained.
[0042]
Only the light that satisfies (Equation 9) out of the characters and figures drawn on the inner surface of the outer container and has an angle e that satisfies Expression (Equation 5) was put into the double container DB1. It can emerge above the liquid level, ie only the light is visible from above the liquid level. At this time, the value of the angle e is obtained from (Equation 5) and (Equation 9) from about 36.7 ° <e <about 50.3 °.
It becomes.
[0043]
The angle f when (Equation 10) is satisfied is obtained from (Equation 3) and (Equation 10) from about 51 ° <f <about 90 ° (Equation 11).
It becomes.
[0044]
As shown in (Equation 11), the light emitted from the inner surface 10a of the outer container below the liquid surface comes out above the liquid surface at an angle of about 51 ° or more with a line perpendicular to the liquid surface. It turns out that.
[0045]
In other words, the angle formed with the line perpendicular to the liquid surface is less than about 51 °, and even when the inside of the double container DB1 is viewed from above the liquid surface, it is drawn below the liquid surface of the inner surface 10a of the outer container. The character / figure MZ cannot be seen.
Since the angle of less than about 51 ° can be sufficiently secured when drinking water in the double container DB1, the effect of the invention (characters / graphics MZ become visible as the water W is drunk) can be sufficiently exhibited.
[0046]
Also, when the angle between the double container DB1 and the line perpendicular to the liquid surface is viewed from an angle of about 51 degrees or more, light emitted from the characters / graphics MZ below the water surface can be seen.
However, as can be seen from the “line obtained by extending the light coming out above the liquid surface in the direction opposite to the traveling direction” La in FIG. 6, the characters and graphics MZ appear to be compressed in the vertical direction. In some cases, it is difficult to determine what is drawn on the inner surface 10a, and the effects of the invention can be expected.
[0047]
(2) Second Embodiment FIG. 8 is an external perspective view of a double container DB2 filled with sake of the present embodiment. As shown in FIG. 8, a window 11 is formed on a part of the side surface of the non-light-transmitting outer container 10, and the window 11 is covered with a transparent plastic 12 while ensuring waterproofness.
[0048]
In this way, when, for example, sake is filled in the double container DB2, the characters / graphics MZ drawn on the inner surface of the facing outer container 10 through the window 11 can be seen from the outside of the double container DB2. It becomes. However, when viewed from above the outer container 10, it is possible to obtain the effect that the character / graphic MZ cannot be viewed.
[0049]
In the first embodiment, the case where the outer container is made of “non-light-transmitting” paper has been described, but the outer container may be made of the same “light-transmitting” plastic as the inner container. . In this case, the characters and figures drawn on the inner surface of the outer container can be seen from the outside of the outer container, and if the outer surface side of the outer container is entirely colored (for example, solid red), the characters on the inner surface can be seen.・ The figure can be made invisible from the outside of the outer container.
[0050]
In addition, if the result of winning a bonus for a person who has purchased a double container containing sake, for example, is displayed on the inner surface of the outer container with numbers, letters, symbols, etc., the sake etc. can be placed in a double container. Since the winning result can be understood for the first time by drinking it off, it can be used as a container for sake etc. with a winning.
[0051]
【The invention's effect】
As described above, according to the present invention, the following effects can be exerted.
According to the first aspect of the present invention, when a liquid is put in a double container, even if the liquid is a light-transmitting liquid, when the liquid is viewed from above the liquid surface of the double container, the liquid may be doubled depending on the viewing direction. Characters and figures drawn on the inner surface of the container below the liquid level can not be seen.
[0052]
In addition, as the liquid level of the light-transmitting liquid drops, characters and figures drawn on the inner surface of the double container located above the liquid surface appear so that the liquid can be seen from above the liquid surface of the double container. It becomes possible to do.
[0053]
According to the invention described in claim 2, the characters or figures drawn on the inner surface of the outer container can always be seen from the outer side surface of the double container, but the light-transmissive liquid is filled in the double container. At this time, characters or figures drawn on the inner surface of the outer container can be made invisible depending on the angle at which the liquid surface is viewed from above and the remaining amount of the light transmitting liquid.
[0054]
According to the third aspect of the present invention, characters or figures drawn on the inner surface of the outer container are not visible from the outer side surface of the double container, but the inner surface is visible from above the double container. I can do it. However, when the light-transmissive liquid is placed in the double container, when viewed from above the liquid surface of the light-transmissive liquid, it is drawn on the inner surface of the outer container, depending on the angle to be observed or the remaining amount of the light-transmissive liquid. Characters or figures can be made invisible.
[0055]
According to the fourth aspect of the present invention, since only a part of the outer container is formed of the light transmissive member, the effect of the second aspect of the present invention can be easily attracted to human attention.
[0056]
According to the invention described in claim 5, the characters or figures drawn on the outer surface of the light transmitting member of the outer container are, when the light transmitting liquid is put in the double container, from the outer side surface of the double container. However, characters or figures drawn on the inner surface of the outer container cannot be seen depending on the height of the liquid surface or the angle from which the liquid is viewed from above. As a result, it is possible to enjoy a change in the appearance of characters or figures.
[0057]
According to the invention described in claim 6, the heat insulating property or the mechanical strength of the double container is increased by the light transmitting material filled in the space without losing the effect of the invention described in claim 1 to claim 5. Can be done.
[0058]
According to the invention of claim 7, since the production of the double container is performed in the air, the space by the air can be easily formed between the inner surface of the outer container and the outer surface of the inner container. The configuration of the present invention can be easily obtained.
[0059]
According to the invention described in claim 8, for example, the result of winning is understood only by drinking sake, drinking water, etc. from the double container, serving as a service to the customer, which is useful for sales promotion.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a first embodiment of the present invention.
FIG. 2 is an external view in which an inner container is fitted into an outer container constituting the embodiment, (A) is an external perspective view, and (B) is a side view.
FIG. 3 is a partially sectional view showing a state where the inner container is fitted into the outer container constituting the embodiment.
4A and 4B are diagrams illustrating an operation in the embodiment, and FIG. 4A is a diagram illustrating that characters and figures cannot be seen by human eyes immediately after a seal cover is removed, and FIG. Is a view showing that "figure of Mt. Fuji" is visible but "character of Mt. Fuji" is not yet visible.
FIG. 5 is a cross-sectional view taken along line AA ′ of FIG. 2B in a state where water is filled in the same embodiment.
FIG. 6 is a diagram illustrating a state of refraction of light traveling from characters / graphics drawn on the inner surface of the outer container in the embodiment.
FIG. 7 is a diagram illustrating a state of refraction of light traveling in the water when the light is visible depending on the position of the human eye above the water surface, and when the light is not visible.
(A) is a diagram showing a state in which light can be seen by a human eye placed in the light traveling direction above the water surface.
(B) is a diagram showing that light cannot be seen by human eyes placed at a position different from the light traveling direction above the water surface.
(C) is a diagram showing a state where light cannot be seen wherever the human eye is located because light is reflected on the water surface and does not travel to the upper side of the water surface.
FIG. 8 is a perspective view showing a second embodiment of the present invention, in which a transparent window is formed in a double container.
[Explanation of symbols]
DB Double container DB1 Double container DB2 filled with water Double container ED with transparent window Sake G Space I Human eye Ia Human eye Ib placed in the light traveling direction Different from the light traveling direction The human eye L placed at the position The path of the light La The line MZ obtained by extending the light coming out on the upper side of the liquid surface in the direction opposite to the traveling direction Characters / graphics US The air layer W on the upper surface of the water W Water WS Water surface 10 Outer container 10a Outside Inner surface 10b of container Top edge 11 of outer container Window 12 Transparent plastic 20 Inner container 20a Outer surface 20b of inner container Inner surface 20c Edge of upper surface of inner container 20d Folded portion 30 of edge of upper surface of inner container Seal Lid 30a Knob 40 Outer lid a ° The incident angle when light emitted from the characters / graphics MZ drawn on the inner surface of the outer container reaches the outer surface of the inner container.
b ° Angle of refraction when light emitted from the character / graphic MZ drawn on the inner surface of the outer container reaches the outer surface of the inner container and enters the inner container.
c ° The incident angle when the light emitted from the characters / graphics MZ drawn on the inner surface of the outer container reaches the boundary between the inner container and the light transmitting liquid.
d ° Angle of refraction when light emitted from the character / graphic MZ drawn on the inner surface of the outer container enters the light transmitting liquid after reaching the boundary between the inner container and the light transmitting liquid.
e ° The incident angle when the light emitted from the character / graphic MZ drawn on the inner surface of the outer container reaches the liquid surface of the light transmissive liquid.
f ° Refraction when light emitted from the characters / graphics MZ drawn on the inner surface of the outer container reaches the liquid surface of the light transmitting liquid and then enters the air layer above the liquid surface of the light transmitting liquid. Corner.

Claims (8)

In a double container containing a light transmissive liquid with an outer container and an inner container,
The inner container is made of a light-transmissive member, has a space in at least a part between the inner surface of the outer container and the outer surface of the inner container, and at least one of a character and a graphic on the inner surface of the outer container. A double container characterized by being drawn. The double container according to claim 1,
The double container, wherein the outer container is made of a light transmissive member. The double container according to claim 1,
The double container, wherein the outer container is made of a non-light-transmitting member. The double container according to claim 3,
A double container, wherein a part of the outer container made of the non-light-transmitting member is made of a light-transmitting member. In the double container according to claim 2 or 4,
A double container, wherein at least one of a character and a figure is drawn on an outer surface of the light transmitting member of the outer container. The double container according to claim 1, wherein
A double container characterized in that a space between the inner container and the outer container is filled with a light-transmitting material having a lower light refractive index than constituent members of the inner container. The double container according to claim 6,
The double container, wherein the light transmitting material is air. The double container according to claim 1, wherein
The double container, wherein the character or the graphic is a winning result of a lottery.

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