CN101636324A - bottle with waist - Google Patents

Abstract

The invention provides a bottle with a waist, which has strong decompression absorption capacity, high strength and beautiful appearance. It has a waist portion formed by a curved surface on at least a part of the side of the bottle, at least one plate for decompression absorption is provided at least on the waist portion, and the width of the plate is the span from one end of the plate to the other end. changes continuously.

Description

bottle with waist

technical field

The present invention relates to a bottle with a waist, and more particularly to a bottle with a waist including a plate for absorbing the pressure reduction caused by the volume reduction of a liquid.

Background technique

Conventionally, various shapes have been proposed as bottles for storing beverages and the like. For example, there is a so-called bottle with a waist that reduces the diameter of the middle region in the vertical direction of the bottle. The waisted bottle is not only attractive in appearance, but also has the feature of being able to securely hold the bottle when the user grasps the waisted portion of the bottle.

Resin containers such as beverages are subjected to temperature changes such as cooling after containing beverages. At this time, the interior of the container becomes decompressed due to volume reduction of the internal liquid, and the container may deform. In order to prevent this, a plate for absorbing reduced pressure may be provided on the surface of the bottle. The plate is generally a bottle wall structure that is concave inward from the surface of the bottle. Although various shapes are used as the shape of the board, generally, a structure combining polygons or the like is often used. In addition, the plate is important for the container because it not only serves the purpose of absorbing reduced pressure, but also improves the strength of the bottle itself while reducing the amount of materials used. As this example, a combination of triangular plates is disclosed (see Patent Document 1).

Moreover, as an example of providing a plate on the side surface of a bottle, there is disclosed that a rectangular plate extending in the vertical direction is provided on the side surface of the bottle (see Patent Document 2). In this example, in order to make it easy to see the characters printed on the surface of the label installed around the bottle, or to keep the design images printed on the surface of the label from changing, the number of plates on the main body of the bottle is multiple. , into a polygonal shape.

In addition, as another example of providing a plate on the side of the bottle, it is disclosed that a deformed rectangular plate is provided on the side of the bottle and a transverse rib is provided near the middle of the bottle in the vertical direction (see Patent Document 3). In this example, deformation of the container can be suppressed by the rigidity-enhancing effect of the transverse ribs and the pillars formed between the plates.

In addition, in order to maintain the appearance of the bottle with a smooth curved surface and maintain rigidity without providing a plate on the surface, a bottle in which protrusions and recesses are arranged alternately in the circumferential direction in a stepped shape is disclosed (see Patent Document 4).

Patent Document 1: Japanese Patent Laid-Open No. 2002-370721

Patent Document 2: Japanese Patent Laid-Open No. 2001-206331

Patent Document 3: Japanese Patent Laid-Open No. 2002-332022

Patent Document 4: Japanese Patent Laid-Open No. 2003-40230

Contents of the invention

However, in the above-mentioned waisted bottle, there are the following problems. That is, although the surface of the bottle with a waist is smoothly curved, if a combined polygonal plate is formed on the surface of the bottle formed by such a curved surface, the deformation of the container due to decompression is concentrated locally and the bottle is tapered. Comes in case of big deformation. In addition, when a bottle having a waist portion is manufactured from a material such as polyethylene phthalate (PET), the thickness of the material of the waist portion may become thin due to the manufacturing method.

In addition, in a bottle with a waist having a side formed by a continuous smooth curved surface, applying a combination of a plurality of polygonal plates as disclosed in Cited Document 1 makes people feel that the beauty of the bottle itself is damaged, and at the same time It may also make the person holding the bottle uncomfortable with the mismatch of curved surfaces and polygons.

In addition, as in the bottle disclosed in Cited Document 2, simply increasing the number of surfaces of the main body of the bottle reduces the area of the surface having the function of absorbing pressure inside the bottle, and a sufficiently satisfactory function cannot be obtained. Therefore, irregular decompression deformation occurs or rigidity decreases due to narrowing of the width of concave or convex ribs disposed on the main body portion for the purpose of increasing strength.

In addition, as in the bottle disclosed in Cited Document 3, in order to enhance the strength around the decompression absorbing plate, the circumferentially continuous annular groove portion is provided to prevent the lateral external force on the main body or the pressure around the decompression absorbing plate. Deformation has an effect, but it has the opposite effect on the vertical load strength of the load in the height direction of the bottle, often resulting in a reduction in strength.

Also, as in the bottle disclosed in Cited Document 4, since rigidity is ensured by using a stepped shape consisting of a simple convex portion and a concave portion, it is not suitable for a tall bottle.

An object of the present invention is to provide a bottle with a waist that can solve the above problems. In order to achieve this object, the present invention is a bottle with a waist that has a waist portion formed by a curved surface on at least a part of the side surface of the bottle, at least one plate for decompression absorption is provided at least in the waist portion, and a configuration in which the width of the panel varies continuously over the span of the panel from one end to the other.

The width of the thinnest part of the board in the waist part is wider than that of other parts.

The horizontal cross-section of the plate is more concave toward the inside of the bottle than other parts of the side of the waisted bottle.

A configuration in which the horizontal section of the plate is curved is adopted.

Adopt the configuration that the plate extends to the vicinity of the upper and lower ends of the bottle with a waist.

At least two plates are provided, and the plates are arranged at equal intervals along the circumference of the waisted bottle.

A configuration in which the number of the plates is eight is employed.

According to the present invention, the waisted bottle having a waisted portion formed of a curved surface on at least a part of the side surface of the bottle can realize a bottle having a strong decompression absorption capacity while ensuring the strength of the bottle itself. In addition, it is possible to suppress reduction in the thickness of the waistband material. Moreover, while maintaining the aesthetic appearance of the bottle, it can be realized that the person who holds the bottle does not feel uncomfortable.

Description of drawings

Fig. 1 is a front view showing a bottle with a waist according to one embodiment of the present invention.

Fig. 2 is the bottle disclosed in Fig. 1, Fig. 2 (A) represents a top view, Fig. 2 (B) represents a bottom view, and Fig. 2 (C) represents a sectional view along the A-A line of Fig. 1 .

Fig. 3 is a perspective view of the bottle disclosed in Fig. 1 with a shadow on it.

Fig. 4 is a table showing the thickness of each part of a conventional waisted bottle without a plate.

Fig. 5 is a table showing the thickness of each part of the waisted bottle of the present invention.

Symbol Description

1-bottle with waist; 11-waist; 21-side wall; 31-plate; 41-cap matching part; 41a-external thread part.

Detailed ways

One of the embodiments of the present invention will be described below with reference to the drawings.

Overall overview

The bottle 1 with a waist according to one embodiment of the present invention has a gourd shape in which at least a part of the side of the bottle has a waist 11 formed by a curved surface in the middle part of the bottle in the vertical direction. In this embodiment, A waist-retracting part 11 is formed at a position slightly above the center in the up-down direction. The side surface of the waisted bottle 1 is composed of a side wall 21 having a substantially circular cross-section and a decompression-absorbing plate 31 formed at least in the waisted portion. In addition, a cap fitting portion 41 for fitting a cap (not shown) is formed at the upper end of the waisted bottle 1 . In addition, the bottle 1 with a waist according to this embodiment is a so-called PET bottle made of a transparent polyethylene phthalate material.

side wall

The side wall 21 is a wall member that continues from the upper end to the lower end of the waisted bottle 1, and has a substantially circular cross section except for the plate 31 as shown in FIG. The diameter of the circular cross-section of each part is the smallest at the waist 11, the upper part of the bottle 1 with the waist is the middle size, and the bottom is the largest. Since the middle part in the vertical direction is the waist part 11, the bottle 1 with the waist can be securely held by gripping the waist part 11. Moreover, when the "waist-retracting part" is referred to here, it includes the part with the smallest diameter, and also includes its upper and lower vicinity areas. Therefore, it should be understood that the present invention is also applicable to, for example, only the waist portion is formed by a curved surface, and other parts are formed by a combination of planes.

plate

In addition, a plurality of plates 31 are formed on the side surface of the waisted bottle 1 . The plate 31 has the widest width at the thinnest (smaller diameter) part of the waist portion 11, and the narrowest width between one end and the other end (near both ends in the vertical direction when the bottle is erected), and is a so-called boat-shaped plate. , the width changes continuously. As shown in FIG. 2(C) and FIG. 3 , the cross-sectional shape of the plate 31 is a concave shape curved inwardly. Moreover, the depth of the board 31 is comprised so that the waist part 11 may be the deepest (approximately 3mm), and both ends in the up-down direction shall be the shallowest. Moreover, FIG. 3 is a perspective view of a bottle with a waist, and the lines shown on the surface of the bottle are shown to help understanding of the three-dimensional shape. The plate 31 in this embodiment is extended to the vicinity of the upper and lower ends of the waisted bottle 1 . However, the present invention is not limited thereto, and the plate 31 may be formed only on the waist portion 11, or may be set to a length that exceeds the waist portion 11 and does not reach near the upper and lower ends of the bottle.

In the waisted bottle 1 according to the present embodiment, the number of plates 31 is eight. This is to securely absorb the deformation of the bottle due to the reduced pressure while ensuring the strength of the bottle itself. However, the present invention is not limited thereto, and may be from 1 to 7 or more than 9 blocks. However, it is also necessary to adjust the width of each plate 31 depending on the number of plates 31 . Furthermore, the bottle 1 with a waist according to this embodiment is for the above-mentioned 500 ml, and an example of a specific size will be described. s position. In addition, the maximum width of the board exists near the minimum diameter part of the waist part 11, and its width is about 15.8 mm. And, in Fig. 1, the minimum diameter of the waist-reducing portion represented by the A-A line is about 53.5mm, the diameter of the upper part represented by the B-B line is about 63mm, and the diameter of the lower part represented by the C-C line is about 68.5mm.

Cap fitting

The upper end of the bottle 1 with a waist is a bottle cap matching portion 41 . The cap fitting portion 41 is formed with an external thread portion 41a, which engages with an internal thread portion formed on the back of the cap (not shown). However, the external thread portion 41a is not essential to the present invention, and may be formed as a simple cylindrical portion, for example, and may have a structure in which the bottle cap is pushed in and sealed.

The thickness of each part of the bottle

The waisted bottle 1 according to the present invention is molded, for example, by a method called blow molding. This is a method in which the preform is held in a mold that determines the shape of the bottle, and the material is pressed against the mold by introducing compressed air inside. Owing to such a manufacturing method, in molding the bottle 1 with a waist, the thickness of the waist part may become thin. For example, in the case of a bottle with a smooth side without forming a plate, as shown in FIG. 4, although the thickness other than the waist is about 0.35 mm to 0.37 mm, the thickness of the waist is reduced to about 0.29 mm. .

On the other hand, FIG. 5 is a table showing the thickness of each part of the waisted bottle 1 having the plate 31 . As shown in the table, the thickness of the smallest diameter portion of the waist portion 11 is 0.27 mm, which is thicker than the thickness (0.23 to 0.24 mm) of the upper and lower regions. This is because unevenness is formed in the molding die for forming the plate 31 , and the unevenness produces an effect of preventing material from flowing. In this way, by forming an appropriate plate, compared with a bottle without a plate, the thickness of the waist portion 11 is increased as a result, and the effect of forming a column in the height direction of the bottle 1 with a waist is produced at the same time, so it can be increased. Increase the longitudinal compression strength of the waist portion 11 .

How to fill the contents

In this waisted bottle 1, a drink is filled as an example. Since the filling method of the drink differs according to the kind, these will be briefly described. Specifically, there are generally 1) hot filling, 2) aseptic normal temperature filling, and 3) cold filling.

Hot filling is a method of filling a bottle at a temperature considerably higher than normal temperature (for example, 85° C.). Sports drinks, juice drinks, etc. use this method. In addition, aseptic normal temperature filling is a method of filling beverages into bottles at a temperature of about 25°C. Use this method with tea, water, coffee with milk, black tea, etc. In addition, cold filling is a method of filling at a temperature lower than normal temperature, and is used for filling carbonated drinks and the like. Here, the present invention can be applied to 1) hot filling and 2) aseptic normal temperature filling among the above filling methods.

generation of decompression

After the beverage is filled in the bottle, the bottle becomes decompressed due to the following reasons. For example, in the case of the above-mentioned aseptic filling at room temperature, although the beverage is filled in the bottle at a temperature of about 25° C., it is actually sold after being cooled to about 5° C. before being put on the shelf. Due to such a temperature change, the beverage as a liquid shrinks. This amount of shrinkage is, for example, about 3.7 ml in the case of a 500 ml bottle. Thereby, the inside of the bottle becomes a depressurized state. In addition, even after the beverage is filled, a certain amount of gas remains in the uppermost part of the bottle. Oxygen is also contained in this gas, and oxygen is dissolved in the beverage by cooling, and a decompression corresponding to an amount of about 2 ml is generated. Also, in the case of PET bottles and the like filled with beverages, moisture permeates through the bottles with the lapse of time during the storage period. The amount relative to the full capacity is about 0.1% per month. Therefore, in the case of a 500ml bottle, about 0.5ml/month of water is lost. In this state, for example, if the bottle is stored for 8 months, about 4 ml of moisture permeates the bottle at most.

When the above various decompression factors are combined, it is equivalent to a decompression of less than 10ml converted to volume. Therefore, for example, in order to maintain the original shape of a 500ml bottle without deformation, a minimum decompression absorption capacity of about 10ml is required. In the bottle with a waist that does not have a plate for decompression absorption, the container is greatly deformed by the above decompression. Specifically, a circular cross section may be crushed to have a cross-sectional shape close to an ellipse. If such deformation occurs, the value of the product in the circulation process will be significantly reduced.

effect

Next, the action of the waisted bottle 1 of this embodiment with respect to the above-mentioned decompression will be described. Since the boat-shaped plate 31 is provided in the present invention, a strong decompression absorption capacity can be obtained. Specifically, the plate 31 is slightly recessed toward the inner side of the waisted bottle 1 in order to absorb the decompression. Thereby, the reduced portion of the volume of the beverage is reliably absorbed, and the other portions are not influenced by deformation. In particular, the plate 31 of this embodiment extends to the vicinity of the upper and lower ends of the bottle with a waist, and the plate 31 can move relatively freely toward the inside of the bottle. Therefore, the overall shape of the waisted bottle 1 is not affected by the internal pressure state, and the shape of the initial filling is maintained.

In addition, in the waisted bottle 1 according to the present embodiment, since the plate 31 has a continuously changing smooth boat shape in terms of width and depth, stress due to decompression does not concentrate locally. Moreover, since the plate 31 is extended to the vicinity of both ends of the waisted bottle 1 in the vertical direction, the plate 31 functions as a column, and has sufficient compression force applied to the waisted bottle 1 in the vertical direction. strength.

Moreover, in the bottle 1 with a waist that has a smooth waist 11, by adopting a boat-shaped plate 31 whose width or depth changes smoothly when the waist is received, it has the function of making the person who looks at it feel beautiful, and makes it easy to actually hold it. The person with the bottle 1 with the waist down does not feel the uncomfortable characteristic.

In addition, in this embodiment, although the bottle 1 with a waist has one waist part 11 in the intermediate area of the up-down direction of the bottle 1 with a waist, it demonstrates, but this invention is not limited to this. For example, it is also suitable for bottles with waists provided with two waists. In addition, in this embodiment, although the waist portion 11 is formed substantially horizontally along the circumferential direction of the bottle 1 with the waist, the present invention is not limited thereto, and may be inclined relative to the longitudinal direction, for example, in the bottle. The sides are formed in a so-called helical shape.

The present invention can be applied to structures such as bottle containers for storing liquids and the like.

Claims (7)

1. A bottle with a waist, which has a waist formed by a curved surface on at least a part of the side of the bottle, characterized in that, At least one panel for absorbing pressure reduction is provided at least on the waist-receiving portion, The width of the panel varies continuously over the span of the panel from one end to the other. 2. The bottle with waist according to claim 1, characterized in that the width of the thinnest part of the plate in the waist part is wider than other parts. 3. The waisted bottle according to claim 1 or 2, characterized in that the horizontal section of the plate is more concave toward the inside of the bottle than other parts of the side of the waisted bottle. 4. The bottle with a waist according to any one of claims 1 to 3, characterized in that the horizontal section of the plate is curved. 5. The bottle with a waist according to any one of claims 1 to 4, wherein the plate is extended to the vicinity of the upper and lower ends of the bottle with a waist. 6. The bottle with a waist according to any one of claims 1 to 5, characterized in that at least two plates are provided, and the plates are arranged along the circumference of the bottle with a waist, etc. interval configuration. 7. The bottle with a waist according to claim 6, wherein the number of said plates is 8.

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