JP7037328B2 - Resin bottle - Google Patents

Description

The present invention relates to a resin bottle having a square tubular body.

As a resin bottle such as a PET bottle, a square bottle having a square tubular body is provided on the market. If the body of this type of resin bottle is not rigid enough, the wall surface of the body will bend outward when filled with the liquid, which makes it difficult to store the bottle in the outer box or is used by the user. It is difficult to hold it, and there is a risk that the wall surface will bend inward due to the force of gripping the body and the contents will overflow. Therefore, a device for increasing the rigidity of the body portion by using a method such as providing a concave-convex shape or a rib on the body portion has been conventionally attempted (see, for example, Patent Documents 1 and 2).

Specification of Jitsugyo Hei 1-74886 (Jitsukaihei 3-15319) Japanese Patent No. 5464520

The wall surface of the body of a square bottle is easily noticeable to the user, and if the portion is provided with an uneven shape or ribs in order to ensure rigidity, the aesthetic appearance of the bottle may be impaired and the commercial value may be reduced.

Therefore, an object of the present invention is to provide a resin bottle that achieves both rigidity and aesthetics.

The resin bottle according to one aspect of the present invention has a square tubular body portion (3) formed so that the contour shape exhibits a rectangular or square shape when the comprehensive contour shape circumscribing the cross section is considered. A resin bottle (1; 1A ; 1B; 1C; 1E; 1G; 1H) having a wall surface of the body portion in an upper region (13) and a lower region (14) with respect to the axial direction of the body portion. ), A plurality of flat portions (20) and the outer edge (20a) of the flat portion are connected to the wall surface (10) of the specific range (17) set in the lower region when the lower region is divided. A plurality of inclined portions (21) that gradually deviate inward or outward of the body portion are provided as they move away from the body, and the plurality of inclined portions are connected to each other so as to form an intersection line portion (21a). The plurality of flat portions include a specific flat portion having the entire circumference of the outer edge connected to the inclined portion, and the specific flat portion connected to the one inclined portion with respect to the one inclined portion connected to the specific flat portion. The direction in which the outer edge of the flat portion extends and the direction in which the line of intersection formed between the one inclined portion and the other inclined portion extends are different from each other .

According to the above aspect, at each of the outer edge of the flat portion and the intersection line portion between the inclined portions, a bending line having an effect of increasing rigidity is formed on the body portion. Therefore, the rigidity of the body portion is biased in a specific direction by appropriately setting the shape and arrangement of the flat portion and the inclined portion and directing the outer edge of the flat portion and the intersection line portion between the inclined portions in various directions. It can be enhanced evenly in various directions. By appropriately arranging the flat portion, the direction in which each side surface of the square tubular body is directed is appropriately emphasized to the user, and the appearance is changed by the combination of the flat portion and the inclined portion. Thereby, a certain decorative effect can be given to the resin bottle. Therefore, it is possible to appropriately secure the rigidity of the resin bottle and enhance its aesthetic appearance. By extending the intersection line portion in a direction different from the outer edge, the rigidity of the body portion can be further increased evenly in various directions. The lower part of the body portion is a region where the weight of the content liquid acts relatively large, and may be gripped by the user, and is relatively conspicuous to the user. Therefore, by setting a specific range in the lower region of the body portion and providing the flat portion and the inclined portion, the action and effect of the resin bottle according to the above aspect can be surely and effectively exhibited.

In the above embodiment, the wall surface has a plurality of side wall portions (11) extending along the direction of each side of a rectangle or square circumscribing the cross section of the body portion, and a plurality of corner portions arranged between the side wall portions ( 12) may be included, and the plurality of flat portions may be provided on each side wall portion. According to this, it is possible to improve the aesthetic appearance of the body portion while increasing the rigidity in the side wall portion of the resin bottle.

Further, the plurality of flat portions and the plurality of inclined portions may be provided at the corners of the body portion. According to this, it is possible to improve the aesthetic appearance of the body portion while increasing the rigidity not only in the side wall portion but also in the corner portion.

In the above embodiment, each of the plurality of flat portions may be provided so that at least a part of the outer edge is inclined obliquely with respect to the axial direction. According to this, the bending line formed between the outer edge of the flat portion and the inclined portion is inclined diagonally with respect to the axial direction of the body portion, and the bending bending line causes the axial direction of the body portion and the bending line. It is possible to produce the effect of increasing the rigidity in both the direction orthogonal to this and the direction of each side.

Further, the specific range may be set to at least a part of a range exposed to the outside of the body without being covered with the film wrapped around the body. The area exposed to the outside of the body is conspicuous to the user as compared with the area hidden by the film, and a high aesthetic sense is required. Therefore, by setting such a region as a specific range and providing the flat portion and the inclined portion, the action and effect of the resin bottle according to the above aspect can be more reliably and effectively exhibited.

In the above description, reference numerals of the accompanying drawings are added in parentheses to facilitate understanding of the present invention, but the present invention is not limited to the illustrated form.

The front view of the resin bottle which concerns on one embodiment of this invention. The right side view of the resin bottle of FIG. Sectional drawing along line III-III of FIG. Sectional drawing taken along the line IV-IV of FIG. FIG. 6 is a cross-sectional view taken along the line VV of FIG. The front view of the resin bottle which concerns on the 1st modification. The front view of the resin bottle which concerns on the 2nd modification. The front view of the resin bottle which concerns on the 3rd modification. The front view of the resin bottle which concerns on 4th modification. The front view of the resin bottle which concerns on 5th modification. The front view of the resin bottle which concerns on the 6th modification. The front view of the resin bottle which concerns on 7th modification. The front view of the resin bottle which concerns on 8th modification.

1 to 5 show a resin bottle according to one embodiment of the present invention. As shown in FIGS. 1 and 2, a resin bottle (hereinafter abbreviated as a bottle) 1 is for containing a beverage or other liquid, and is, for example, a blow molding method using PET (polyethylene terephthalate) resin as a material. Is molded into a predetermined shape. The bottle 1 is provided with a bottom portion 2, a body portion 3, a shoulder portion 4, and a mouth portion 5 in this order from the bottom. The body portion 3 is formed so as to have a rectangular or square shape when the comprehensive contour shape circumscribing the cross section of the body portion 3 is conceived (FIGS. 3 to 3). 5). Bottles with such a body are sometimes referred to as square bottles. In addition, in FIG. 1 and FIG. 2, a plurality of components to which the same reference numeral should be attached are designated by reference numerals as representatives thereof in order to avoid complication of the figure.

As is clear from FIGS. 3 to 5, the wall surface 10 of the body portion 3 is located between the four side wall portions 11 extending along each side of a rectangle or a square having a comprehensive contour shape, that is, between the side wall portions 11. It includes four corners 12 arranged at the four corners of the body 3. The wall surface 10 means all the surfaces that appear while going around the body portion 3 in the circumferential direction. As shown in FIGS. 1 and 2, the wall surface 10 is substantially bisected into an upper region 13 and a lower region 14 with a substantially center in the axial direction of the body portion 3 (or bottle 1) as a boundary. The upper region 13 is set as an region to which a film such as a shrink film for displaying product information such as a product name and a trademark in combination with a predetermined design should be wound. In the upper region 13, a plurality of groove portions 15 are provided so as to go around the body portion 3. The groove portions 15 are arranged at substantially the same intervals in the axial direction of the body portion 3 (vertical direction in FIG. 1). The lowermost groove portion 15 also functions as a shape element that defines a boundary between the upper region 13 and the lower region 14. That is, the groove portion 15 in the lowermost stage corresponds to the lower end of the upper region 13, and the film is wound around the body portion 3 so as to cover the upper side thereof.

The lower region 14 is set as a region exposed to the outside of the body portion 3 without being covered with the film. The lower region 14 of the wall surface 10 is further divided into a bottom region 16 and a decorative region 17. In FIG. 1, the boundary positions of these regions 16 and 17 are shown by the imaginary line L1. The bottom region 16 is formed in a flat surface shape that goes around the body portion 3 in a band shape along the lower edge portion of the body portion 3. In the bottom region 16, the side wall portion 11 of the wall surface 10 corresponds to the direction of each side of a rectangle or a square which is a comprehensive contour shape of the body portion 3 (corresponding to the vertical and horizontal directions in FIGS. 3 to 5; These directions may be referred to as side directions) and extend parallel to any of the axial directions of the body portion 3, and the corner portion 12 is obtained by chamfering the boundary of the side wall portion 11 by a certain amount. A direction substantially parallel to the diagonal side (corresponding to a direction inclined by approximately 45 ° with respect to the side direction in FIGS. 3 to 5; hereinafter, this direction may be referred to as an oblique side direction), and an axis of the body 3. It extends parallel to any direction.

The decorative region 17 is a region formed by combining a plurality of flat portions 20 and a plurality of inclined portions 21, and corresponds to an example of a specific range. As is clear from FIG. 4, in each of the side wall portion 11 and the corner portion 12, the flat portion 20 is extended in a plane shape parallel to the side direction. As shown in FIGS. 1 and 2, the flat portion 20 is formed in a substantially rhombic shape except for the flat portions 20 arranged at the upper end portion and the lower end portion of the decorative region 17. The flat portions 20 at the upper end and the lower end of the decorative region 17 are formed in a triangular shape obtained by dividing a rhombus into two. In both the diamond-shaped flat portion 20 and the triangular flat portion 20, the outer edge 20a extends in a direction inclined diagonally so as to rise to the right or to the left with respect to the axial direction of the body portion 3.

A plurality of flat portions 20 are provided on each side wall portion 11 and each corner portion 12. That is, a plurality of flat portions 20 are provided on one side wall portion 11, and a plurality of flat portions 20 are also provided on one corner portion 12. In each side wall portion 11, the flat portions 20 are arranged in two rows in the axial direction of the body portion 3, and in each corner portion 12, the flat portions 20 are arranged in a row in the axial direction. In the side direction and the hypotenuse direction, triangular flat portions 20 are arranged in a row at the upper end and the lower end of the decorative area 17, and rhombic flat portions 20 are arranged in two rows between the flat portions 20. ing. Each flat portion 20 is provided so as to be in contact with an adjacent flat portion 20 at its apex. The bottom side of the flat portion 20 arranged at the upper end portion of the decorative region 17 is connected to the groove portion 15, and the bottom side side of the flat portion 20 arranged at the lower end portion of the decorative region 17 is flush with the wall surface 10 of the bottom side region 16. It is in a row. In FIG. 4, the positions of the apex portions of the flat portion 20 are indicated by white circles. The number of flat portions 20 provided on each side wall portion 11 and each corner portion 12 may be appropriately changed according to the size of the decorative region 17.

As shown in FIGS. 1 and 2, the inclined portion 21 has a triangular shape, and one side thereof is arranged so as to be continuous with the outer edge 20a of the flat portion 20. Each inclined portion 21 is provided in a one-to-one correspondence with the outer edge 20a so as to share a boundary with one side of the outer edge 20a of the flat portion 20. As is clear from FIGS. 3 and 5, the inclined portion 21 is inclined so as to gradually retract inward of the body portion 3 as the distance from the outer edge of the flat portion 20 increases. Except for the portion of the flat portion 20 in contact with the outer edge 20a, the inclined portions 21 have a valley line 21a (partially omitted in the figure) as an example of the intersection line portion in the inner part of the body portion 3. They are connected to each other so as to form. The valley line 21a extends substantially parallel to the axial direction of the body portion 3 or the side direction or the hypotenuse direction of the body portion 3. That is, the valley line 21a between the inclined portions 21 adjacent to the axial direction of the body portion 3 extends in the side direction or the hypotenuse direction of the body portion 3, and the valley between the inclined portions 21 adjacent to the side direction or the hypotenuse direction of the body portion 3 The streaks 21a extend in the axial direction of the body portion 3. In FIGS. 3 and 5, the position of the apex of the flat portion 20 is indicated by a white circle, and the intersection of the valley lines 21a is indicated by a black circle.

As described above, in the decorative region 17, the flat portions 20 are regularly arranged, and the inclined portions 21 are gradually retracted from the flat portions 20 to the inside of the body portion 3 between the flat portions 20. And are arranged regularly. Therefore, in the decorative region 17, bending lines having an effect of increasing rigidity are formed on the wall surface 10 at each of the outer edge 20a of the flat portion 20 and the valley line 21a of the inclined portion 21, and the outer edge 20a is the body portion 3. The valley line 21a extends in a direction different from that of the outer edge 20a, specifically, in the axial direction, the side direction, or the hypotenuse direction of the body 3, respectively, in a direction obliquely inclined to both sides in the axial direction of the body 3. As a result, the rigidity of the decorative region 17 can be evenly increased in various directions without being biased in a specific direction. Moreover, by appropriately arranging the flat portion 20, the direction in which the side wall portion 11 and the corner portion 12 are directed is appropriately emphasized to the user, and the flat portion 20 and the inclined portion 21 are regularly arranged. An orderly uneven shape can be imparted to the appearance of the decorative area 17, thereby giving the bottle 1 an orderly decorative effect. Therefore, it is possible to enhance the aesthetic appearance of the bottle 1 while appropriately ensuring the rigidity of the bottle 1. The unevenness formed by the flat portion 20 and the inclined portion 21 can enhance the sense of stability when the user picks up the bottle 1.

The present invention is not limited to the above-mentioned forms, and may be carried out in various forms. For example, in the above embodiment, the flat portion 20 and the inclined portion 21 are provided on the side wall portion 11 and the corner portion 12 of the bottle 1, respectively, but the flat portion 20 and the inclined portion 21 are provided only on the side wall portion 11. May be done. In that case, the wall surface 10 at the corner portion 12 may be formed in a planar shape extending substantially parallel to the axial direction and the hypotenuse direction of the body portion 3. However, the corner portion 12 may be appropriately provided with an uneven shape. Further, in the above embodiment, only the inclined portion 21 is arranged between the flat portions 20, but the intersection portion of the valley streaks 21a in the inner part of the body portion 3 (positions of the black circles in FIGS. 3 and 5). ), A bottom wall portion substantially parallel to the flat portion 20, a rounded concave surface, or a convex surface may be added.

The flat portion 20 and the inclined portion 21 are not limited to the rhombic shape or the triangular shape as described above, and can be variously deformed. 6 to 13 show examples of first to eighth modifications in which the flat portion 20 and the inclined portion 21 are changed. Hereinafter, examples of these modifications will be described in order. In FIGS. 6 to 13, subscripts A to H are added to the reference numeral 1 to distinguish the bottle 1. Further, in FIGS. 6 to 13, components such as the flat portion and the inclined portion of the bottle are designated by reference numerals common to those in FIGS. 1 to 5, and a plurality of components to be designated by the same reference numerals. In order to avoid complication of the figure, reference numerals are given as representatives of some of them. In FIGS. 6 to 13, the upper region 13 of the body portion 3 is shown in a simplified manner, but the region 13 may have an appropriate shape.

The bottle 1A of FIG. 6 is an example in which the number of flat portions 20 is reduced with respect to the bottle 1 of FIGS. 1 to 5. In the illustrated example, a row of triangular flat portions 20 arranged at the upper end and the lower end of the decorative area 17 and a diamond-shaped flat portion 20 arranged in a row between them are provided. The shape of the inclined portion 21 is the same as that of the bottle 1. The bottle 1B in FIG. 7 is an example in which the shape of the flat portion 20 is unified into a triangular shape with the lower side as the base. Contrary to FIG. 7, the flat portion 20 may be formed in a triangular shape with the upper side as the base. The flat portion 20 is not limited to the example formed in a polygonal shape having a linear outer edge 20a such as a rhombus shape or a triangular shape. For example, an elliptical flat portion 20 may be provided as in the bottle 1C shown in FIG. Even in such a flat portion 20, the outer edge 20a extends diagonally while gradually changing the inclination angle with respect to the axial direction of the body portion 3, and the valley line 21a between the inclined portions 21 connected to the outer edge 20a is a flat portion. It extends in a direction different from the outer edge 20a of 20. Therefore, it is possible to exert the effects such as the improvement of rigidity according to the present invention.

The bottle 1D of FIG. 9 is a reference example in which the shape of the flat portion 20 of the bottle 1A of FIG. 6 is changed. Each of the flat portions 20 arranged in a row in the middle of the decorative region 17 in the axial direction has an octagonal shape, and the flat portions 20 arranged at the upper end and the lower end of the decorative region 17 have an octagonal shape divided into two. The adjacent flat portions 20 are connected to each other so as to share one side of the outer edge 20a. The outer edge 20a at the position where the flat portions 20 are connected to each other is shown by an imaginary line in FIG. The inclined portion 21 is provided so as to be connected to the outer edge 20a at a side different from a part of the outer edge 20a, that is, a portion where the flat portions 20 are connected to each other. The point that the inclined portions 21 are connected to each other so as to form a valley line 21a is the same as that of the bottle 1 of FIG. 1 and the bottles 1A to 1C of FIGS. 6 to 8 .

In the above-described form and modification, the flat portion 20 is formed in a shape symmetrical with respect to the axial direction of the body portion 3. However, the flat portion 20 is not limited to such a symmetrical shape. For example, in the bottle 1E of FIG. 10, the flat portion 20 arranged on the side wall portion 11 is formed in a diamond-shaped or triangular shape in which the apex of the left end is deformed so as to extend to the left. Even with such a flat portion 20, it is possible to exert the effects such as the rigidity improvement of the present invention by combining with the inclined portion 21.

The bottle 1F of FIG. 11 omits the diamond-shaped flat portion 20 arranged at the axially intermediate position of the decorative region 17 with respect to the bottle 1 of FIGS. 1 to 5 or the bottle 1A of FIG. This is a reference example in which a row of triangular flat portions 20 is provided. Even in this case, the bottle 1 is described above in that the outer edge 20a of the flat portion 20 is inclined obliquely with respect to the axial direction of the body portion 3, and the valley line 21a between the inclined portions 21 extends in a direction different from the outer edge 20a. And the same as the bottles 1A to 1E of the modified example or the reference example .

The bottle 1G of FIG. 12 is an example in which the number of flat portions 20 is increased with respect to the bottle 1 of FIGS. 1 to 5. In the illustrated example, a row of triangular flat portions 20 arranged at the upper end and the lower end of the decorative area 17 and a diamond-shaped flat portion 20 arranged over three rows are provided between them. ing. The shape of the inclined portion 21 is the same as that of the bottle 1. In the bottle 1H of FIG. 13, the flat portion 20 arranged in the middle of the decorative region 17 in the axial direction has a star-shaped polygonal shape, and the flat portion 20 arranged at the upper end portion and the lower end portion of the decorative region 17 has a star-shaped polygonal shape. This is a reference example in which the shape is divided into two. In such an example, since the direction of the outer edge 20a of the flat portion 20 can be changed in various ways, the direction of the valley streaks 21a between the inclined portions 21 is also diversified, which is convenient for ensuring and improving the rigidity.

In the above-described form and its modification, the flat portion 20 and the inclined portion 21 are provided only in the decorative region 17 at the lower part of the body portion 3, but the flat portion 20 and the inclined portion 21 are provided in other regions in addition to the decorative region 17. The unit 21 may be provided. The flat portion 20 and the inclined portion 21 may be provided over the entire length of the body portion 3 in the axial direction. Further, the inclined portion 21 is not limited to the example in which the inclined portion 21 is formed so as to gradually recede inward of the body portion 3 as it moves away from the outer edge 20a of the flat portion 20, and the inclined portion 21 is not limited to the example formed so as to gradually recede inward as it moves away from the outer edge 20a of the flat portion 20, and the outside of the body portion 3 as it moves away from the outer edge 20a of the flat portion 20. It may be formed so as to gradually protrude in the direction. In that case, a ridge line is formed between the inclined portions 21 as an example of the intersection line portion instead of the valley line 21a. That is, a plurality of flat portions 20 and the outer edge 20a of the flat portions 20 are connected to the wall surface 10 in a specific range set in at least a part of the axial direction of the body portion 3, and the body portion 3 is separated from the outer edge 20a. A plurality of inclined portions 21 may be provided so as to gradually deviate inward or outward. When the inclined portion 21 is projected from the flat portion 20 to the outside of the body portion 3, for example, the flat portion 20 is decorated by retracting the flat portion 20 inward from the wall surface 10 in the upper region 13. The present invention can be applied without projecting the cross-sectional contour of the wall surface 10 in the region 17 outward from the wall surface 10 in the upper region 13.

In the above-described form and its modification, at least a part of the outer edge 20a of the flat portion 20 is extended in a direction obliquely inclined with respect to the axial direction of the body portion 3, but each side of the flat portion 20 is extended. It may be formed in a rectangular or square shape parallel to the axial direction and the side direction (or the hypotenuse direction) of the body portion 3. Even in that case, the rigidity improving effect of the present invention can be exhibited by directing the intersection of the inclined portions 21 in a direction obliquely inclined with respect to the axial direction of the body portion 3.

The inclined portion 21 may be provided so as to gradually deviate inward or outward of the body portion 3 as the distance from the outer edge 20a of the flat portion 20 increases. Therefore, the inclined portion 21 may be formed in an inclined surface shape having a constant inclination angle, or may be formed in a curved shape that is convex toward the inside or the outside of the body portion 3. In the above-mentioned form and modification, the flat portion 20 is formed as a plane parallel to the axial direction and the side direction or the hypotenuse direction of the body portion 3, but some flat portions 20 are slightly inclined with respect to the axial direction. May be attached. For example, the flat portion 20 arranged at the upper end portion and the lower end portion of the decorative region 17 may be provided so as to draw some downward gradient toward the middle in the axial direction. When such an inclination is applied, the decorative area 17 is given an appearance in which the intermediate portion in the axial direction is somewhat narrowed to the inside of the body portion 3 as compared with the upper end portion and the lower end portion in the axial direction. Can be done. In the bottle of the present invention, various shapes of the flat portion 20 and the inclined portion 21 shown in the above-mentioned form and the modified example thereof may be appropriately combined and used.

The present invention is applicable to bottles of appropriate capacity, but as an example, a certain range centered on 500 ml (for example, from 280 to), in which the user often holds the bottle and directly takes in the beverage from the mouth 5. It may be applied to a bottle (about 1000 ml). Compared to bottles with a larger capacity, bottles in this range have a smaller weight of the content liquid and relatively less swelling of the body and deformation when the user holds it in the hand, but there is an opportunity for the user to carry it. At most, the demand for beauty is relatively high. Therefore, the present invention in which both rigidity and aesthetics are compatible can be suitably applied.

1,1A-1H resin bottle
3 Body 10 Body wall 11 Side wall 12 Corner 14 Lower area 16 Bottom area 17 Decorative area (specific range)
20 Flat part 20a Outer edge of flat part 21 Slope 21a Valley line of slope (intersection line)

Claims (5)

A resin bottle having a square tubular body formed so that the contour shape exhibits a rectangular or square shape when the comprehensive contour shape circumscribing the cross section is considered.
A plurality of flat portions and the flat portion are provided on the wall surface of a specific range set in the lower region when the wall surface of the trunk portion is divided into an upper region and a lower region in the axial direction of the trunk portion. A plurality of inclined portions that are continuous with the outer edge of the portion and gradually deviate inward or outward of the body portion as they move away from the outer edge are provided.
The plurality of inclined portions are connected to each other so as to form an intersection line portion, and the plurality of inclined portions are connected to each other so as to form an intersection.
The plurality of flat portions include a specific flat portion in which the entire circumference of the outer edge is continuous with the inclined portion.
With respect to one inclined portion connected to the specific flat portion, the direction in which the outer edge of the specific flat portion connected to the one inclined portion extends and the intersection formed between the one inclined portion and the other inclined portion. Resin bottles whose lines are different from each other in the direction of extension . The wall surface includes a plurality of side wall portions extending along the direction of each side of a rectangle or square circumscribing the cross section of the body portion, and a plurality of corner portions arranged between the side wall portions, and each side wall portion includes a plurality of side wall portions. The resin bottle according to claim 1, wherein the plurality of flat portions are provided. The resin bottle according to claim 2, wherein the plurality of flat portions and the plurality of inclined portions are also provided at the corners of the body portion. The resin bottle according to any one of claims 1 to 3, wherein each of the plurality of flat portions is provided so that at least a part of the outer edge thereof is inclined obliquely with respect to the axial direction. The resin bottle according to any one of claims 1 to 4 , wherein the specific range is set to at least a part of a range exposed to the outside of the body without being covered with a film wrapped around the body. ..

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