JP2003155016A - Volume reducible bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To productively provide a plastic molded bottle which, when it is empty after use, can be folded easily for reducing volume without damaging performance of the bottle. SOLUTION: This relates to a plastic molded bottle comprising a mouth part, a shoulder part, a body part and a bottom part. The body part is formed in a rectangular tube shape, and at the center in the width direction of at least facing two wall faces of its peripheral four wall faces, a vertical folding rib 9a is provided at least from the top edge of the body part to the height which equals to half of the distance L between the neighboring wall faces on both sides. It is desirable that the bottom end of the vertical folding rib 9a is formed with inverted V shaped (inverted Y shape as a whole) folding ribs 9b, 9c extended toward both bottom corners being separated thereat. It is also desirable that a transverse folding rib 9d connecting the tops of the inverted V shape on both sides is provided going half around or all around.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a volume-reducible bottle, and more specifically, it can store various beverages, liquid seasonings, edible oil and the like, and has a rectangular tubular shape whose body has a rectangular cross section. A molded bottle of plastic formed in, which can be easily reduced in volume after use.

[0002]

Blow-molded bottles, including biaxially stretched blow-molded bottles, have been widely used as plastic molded bottles filled with liquids such as various beverages, liquid seasonings, and edible oils for circulation. There is. Molded plastic bottles such as these have a shape-retaining property and are lightweight and low-cost compared to glass bottles and metal cans, so they are often used in the field of various beverages that are used in large quantities and are used in large quantities. Is being used for.

After being used, such packaging containers are separately collected according to the material, and are recycled or incinerated. However, since they are shape-retaining containers, empty containers are bulky and transport efficiency is poor. Therefore, it has been demanded to make the wall thickness as thin as possible to reduce the amount of the material used and to facilitate the volume reduction by crushing or the like. This point is particularly important for molded plastic bottles that are used in large amounts, and the reduction in thickness is being promoted, including cost reduction. However, in terms of volume reduction to reduce the bulk of the empty container, the method by thinning is not a sufficient solution because there is a limit in the strength of the bottle itself.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a molded plastic bottle without impairing the performance of the bottle. The object of the present invention is to provide a molded bottle which can be made as thin as possible and which can be easily folded after use to reduce its volume with high productivity and economically.

[0005]

The above-mentioned problems can be solved by the present invention described below. That is, the invention as set forth in claim 1 is a plastic molded bottle comprising a mouth portion, a shoulder portion, a body portion, and a bottom portion, and the body portion is formed into a rectangular tube shape having a rectangular cross section, Of the four peripheral wall surfaces forming the body, at least the center in the width direction of each of the two opposing wall surfaces is provided with at least a vertical bending rib for facilitating flat folding of the bottle in the vertical direction. From the upper edge of the part 1 /
It comprises a volume-reducible bottle characterized in that it is provided up to a height position corresponding to the length of 2.

In the present invention, the bending rib is
It can be formed by forming a groove shape having a convex shape on the inside or a groove shape having a convex shape on the outside. When the bending rib is provided in the convex groove shape on the outer side, forming concave portions are provided on both sides of the convex groove shape, and the convex groove-shaped tip portion is the outer circumference of the bottle body. It is preferably provided so as not to project from the surface. When such a folding rib is folded flat in the vertical direction after use to reduce the volume, the folding rib is folded outward (mountain folding) or folded inward (valley folding). By
When it is provided in the vertical direction, it has a function of making the bottle flatly easy to fold, and at the same time, it has a function of strengthening the resistance force against the compressive force in the vertical direction of the bottle, that is, the buckling strength.

Further, the position of providing such a bending rib in the vertical direction is the central portion in the width direction of at least two opposing wall surfaces of the four peripheral wall surfaces forming the body of the bottle, In the length direction, at least from the upper edge of the trunk downward, the distance between the wall surfaces adjacent to each other is 1
It is preferable to provide up to a height position corresponding to a length of / 2. This is because, for example, when the bottles are arranged so that the two wall surfaces provided with the folding ribs are on the left and right and forcefully folds flatly by applying force from the front and back, the folding ribs form a straight line in the vertical direction. This is because it can be folded within this range.

As described above, the ribs for bending in the vertical direction serve as folding lines to facilitate the folding of the bottle, and at the same time, to increase the resistance force against the vertical compressive force of the bottle, that is, the buckling strength. Since it also has, for example, when it is made longer than the length of the above range up and down, the lengthened portion does not work as much as an action that facilitates folding of the bottle, but an action that enhances the buckling strength is can get. Therefore, since the shoulder portion of the bottle generally tends to be thin, it is necessary to extend the rib for bending in the vertical direction above the upper edge of the body portion, for example, by extending it to the vicinity of the middle portion of the shoulder portion. It is effective in improving the buckling strength of. Further, if the bending rib is shorter than the above-mentioned length, it is not preferable because the portion without the bending rib is less likely to be folded and a return due to repulsion occurs.

By adopting such a constitution, when the volume of the bottle after use is reduced, since the ribs for bending in the vertical direction are provided on the two opposing wall surfaces of the body of the bottle, the rib for bending is provided. By folding the bottle into a mountain fold or a valley fold and compressing the body, the body of the bottle can be more easily folded to reduce the volume. In addition, the vertical bending ribs also have the effect of improving the buckling strength of the bottle.

According to a second aspect of the present invention, the rib for bending in the vertical direction is provided vertically at least from the upper edge of the body portion to the height position, and is bifurcated below the height position. The volume-reducible bottle according to claim 1, wherein the bottle is provided in an inverted Y shape toward both lower corners of the wall surface.

By adopting such a configuration, in addition to the function and effect of the invention described in claim 1, the bottle after use is flattened by using the bending ribs on both sides in the vertical direction. When folded in, the bottle can be folded well until it is close to the bottom of the bottle, so that the volume can be reduced more reliably.

According to a third aspect of the present invention, the bottle is provided at a height position corresponding to ½ of the distance between the wall surfaces adjacent to each other on both sides of the wall surface provided with the rib for longitudinal bending.
The volume-reducible bottle according to claim 1 or 2, characterized in that the horizontal bending ribs are provided on the entire circumference of the bottle or on the half circumference connecting the vertical bending ribs on both sides. Consists of.

By adopting such a constitution, in addition to the function and effect of the invention described in claim 1 or 2, the bottle body portion of the bottle after use can be utilized by utilizing the ribs for bending in the vertical direction on both sides. After being flatly folded, it is possible to further fold the bottom of the bottle and flatly fold it by utilizing the lateral bending ribs, so that the volume of the bottle can be more effectively reduced.

According to a fourth aspect of the present invention, in the bottle, the peripheral wall excluding the mouth portion has an average thickness of 0.1 to 0.7 m.
m, and, apart from the bending rib, a plurality of lateral reinforcing ribs are provided on the body peripheral wall at appropriate intervals. It consists of a volume-reducible bottle described in Crab.

When making the bottle thin and lightweight, the peripheral wall excluding the mouth of the bottle, that is, the average thickness of the shoulder portion, the body portion, and the bottom portion is preferably 0.1 to 0.7 mm, and 0.1
More preferably, it is 0.4 mm. When the average thickness is less than 0.1 mm, the strength of the bottle is reduced, and even if lateral reinforcing ribs are provided on the peripheral wall of the body of the bottle, the required strength cannot be obtained and the occurrence of swelling of the body, It is not preferable because the useability such as the holding property when held by hand is impaired. When the average thickness exceeds 0.7 mm, sufficient strength has already been obtained in terms of strength,
There is no need for this, the cost is not increased, the effect of reducing the weight is not obtained, and the bending effect of the bending rib is reduced, which is not preferable.

By adopting such a constitution, in addition to the function and effect of the invention described in any one of claims 1 to 3, since the bottle itself is thin and lightweight, it is originally foldable relatively. Well, since the bending ribs are provided in respective shapes, it is possible to more easily fold the bottle to reduce the volume. Further, since lateral reinforcing ribs are provided at appropriate intervals on the body of the bottle, the strength and rigidity of the body in the lateral direction are strengthened, and the bottle is made thinner without bulging. be able to. The horizontal reinforcing ribs can also be used for horizontal bending ribs, so you can use this to fold flat bottles so that they roll up from the bottom side to the top side. It can be commercialized. Therefore, by reducing the thickness of the bottle, the amount of resin used can be reduced, resource and energy can be saved, and the economy is excellent, and the bottle that can be easily and compactly reduced in volume can be manufactured. Can be well served.

According to a fifth aspect of the present invention, when the bottle is folded at the central portion of the opposite two wall surfaces on the side different from the two opposite wall surfaces provided with the longitudinal bending ribs, the volume is reduced. The panel portion for facilitating application of force and for holding the bottle is formed by recessing the panel portion in a concave shape or by providing a concave groove around the panel portion. Item 1. A bottle capable of volume reduction according to any one of items 1 to 4.

The surface in the panel section may be formed as a flat surface, but may be formed, for example, by providing vertical uneven lines on the entire surface. The panel part itself is provided to make it easier to apply the folding force as described above and to make it easier to hold the bottle, but at the same time, it also has a reinforcing effect on the wall surface of the body part. When the vertical uneven strip is provided on the entire surface, the reinforcing effect is further improved.

Therefore, by adopting the above-mentioned constitution, in addition to the function and effect of the invention described in any one of claims 1 to 4, it is easier to hold the bottle, and the bottle can be easily folded and reduced. The volume of the bottle can be increased and the strength of the body of the bottle can be improved.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the configuration of an embodiment of a volume-reducible bottle of the present invention. Figure 2
FIG. 2 is a side view of the volume-reducible bottle shown in FIG. 1.
FIG. 3 is a plan view of the volume-reducible bottle shown in FIG. FIG. 4 is a front view showing the configuration of another embodiment of the volume-reducible bottle of the present invention. FIG. 5 is a side view of the volume-reducible bottle shown in FIG. FIG. 6 shows FIG.
It is a top view of the bottle which can be volume-reduced shown in FIG.

The material of the volume-reducible bottle of the present invention is not particularly limited and, for example, polyethylene terephthalate, polypropylene, polyethylene and other plastics are used, and these may be used in a single layer. Moreover, you may use the laminated body which laminated | stacked several layers. When a laminate is used, the gas barrier properties of the bottle can be improved, for example, by laminating an saponified ethylene-vinyl acetate copolymer or other gas barrier material on the intermediate layer or the like. As for the molding method of the bottle, in addition to direct blow, any molding method such as biaxial stretching blow can be adopted.

1, 2, and 3, the volume-reducible bottle 100 is a blow-molded thin-walled bottle, and has a mouth portion 1, a shoulder portion 2 continuous with the mouth portion 1, and a shoulder portion. 2 consists of a body part 3 which is continuous and a bottom part 4 which is continuous with the body part 3,
As shown in the plan view of FIG. 3, the lower side of the body portion 3 is formed into a rectangular bottle having a rectangular cross section with a rounded corner.

The mouth portion 1 is formed in a cylindrical shape like a conventional plastic bottle, and a cap (not shown) for closing the opening end of the mouth portion 1 is screwed on the outer peripheral surface of the mouth portion 1. A male screw 13 is provided, and a holding flange 14 used at the time of transporting the bottle is provided at the bottom. The shoulder portion 2 continuing from the mouth portion 1 is formed in an inverted funnel shape as a whole, and from the bottom of the cylindrical mouth portion 1, a body having a rectangular cross-section with a round cross section having a corner R. 3 is formed in a truncated pyramid shape connected to a curved surface.

A plurality of lateral concave groove-shaped reinforcing ribs 10 are provided on the peripheral wall surface of the rectangular tube-shaped body portion 3 at appropriate intervals, and the periphery of the body portion having a rectangular cross section is surrounded. Of the four wall surfaces (see the plan view of FIG. 3), when the two long side wall opposing walls are front and rear wall surfaces 5 and 6, and the short side opposing two wall surfaces are left and right side wall surfaces 7 and 8, As shown in the side view of FIG. 2, a groove-shaped vertical fold for facilitating flat folding of the bottle 100 in the vertical direction is formed at the center of each of the left and right side wall surfaces 7, 8 facing each other in the width direction. Rib 9a for
From the upper edge of the body part 3, the distance L between the wall surfaces adjacent to both sides is 1
A rib for oblique bending provided up to a height position corresponding to a length of 1/2 (1/2) × L, and bifurcating downward from there, toward both lower corners of the respective side wall surfaces 7 and 8. 9b and 9c are provided to form an inverted Y-shaped bending rib 9 as a whole, and a length (1/2) × L of a distance L between front and rear wall surfaces adjacent to both sides of the side wall surface. At the height position corresponding to
No. 0, and as shown in the front view of FIG. 1, at the central portions of the front and rear wall surfaces 5, 6 (positions slightly lower), the folding ribs 9a, 9b, 9c are provided with the bottle 100. A panel portion 11 for easily applying force and easily holding the bottle 100 when the bottle is flatly folded to reduce its volume.
Is provided in the shape of a rectangular recess such as the molding recess 12a.

The plurality of lateral reinforcing ribs 10 provided at appropriate intervals on the peripheral wall surface of the body 3 are essentially the bottles 1.
00 to reinforce the strength in the lateral direction and prevent the bottle 100 from bulging due to the weight of the contents.
If the wall thickness of the body is not particularly thin, it is not always necessary to provide it. In the volume-reducible bottle of the present invention, the folding ribs 9a, 9b, 9 are formed on the body of the bottle 100 in order to further facilitate the operation of flattening the bottle in the longitudinal direction.
It is more preferable that c and 9d are provided and the wall thickness is thin. From this point, it is preferable to provide a plurality of lateral reinforcing ribs 10 for reinforcement. Further, since such a lateral reinforcing rib 10 is formed in the shape of a concave groove, it has a function as a bending line at the same time as the reinforcing function. Therefore, by providing a plurality of lateral reinforcing ribs 10 at appropriate intervals, it is possible to prevent the bottle 100 from bulging, and at the same time, to bend the bottle 100 into the folding ribs 9.
After using a, 9b, 9c, and 9d to fold flatly in the vertical direction, use the reinforcing ribs 10 from the bottom side to the top side,
It is possible to fold it so that it can be rolled up, and the volume can be made more compact.

The groove-shaped folding ribs provided on the left and right side wall surfaces 7, 8 facing each other facilitate the flat folding of the bottle 100 in the longitudinal direction, and at least the width of the side wall surfaces 7, 8 facing each other. By providing a bending rib 9a in the vertical direction from the upper edge of the body portion 3 to a height position corresponding to half the distance L between the wall surfaces adjacent to each other at the center in the direction, The body 3 can be flatly folded by folding the folding rib 9a inward or outwardly.

However, in order to more easily flatly fold the vicinity of the bottom portion where the wall thickness becomes relatively thick, the lower end of each of the side wall surfaces 7 and 8 is divided into two branches from the lower end of the vertical bending rib 9a. It is preferable to provide bending ribs 9b, 9c in an oblique direction toward both corners of the above, and to provide an inverted Y-shaped bending rib 9 at the height position of the lower end of the vertical bending rib 9a. It is more preferable to provide the lateral bending ribs 9d on the entire circumference of the bottle or on the half circumference connecting the lower ends of the longitudinal bending ribs 9a on both sides. In addition to the inverted Y-shaped bending rib 9 as described above, by providing a lateral bending rib 9d,
After the body portion 3 of the bottle 100 is flatly folded, the ribs 9d for lateral folding can be valley-folded, and the bottom portion 4 can be folded up to be flatly folded so as to be flush with the folded body portion 3. Therefore, the volume of the bottle 100 can be reduced more compactly.

The lateral bending rib 9d is
When the lateral reinforcing rib 10 can be provided at this position, the lateral reinforcing rib 10 can be provided to substitute the bending rib 9d. Also, the bending ribs 9a, 9b, 9c, 9d and the lateral reinforcing rib 1 are provided.
No. 0 is formed in a groove shape, but both of them are partially crossed, so that the bending effect of the bending ribs is not impaired, the bending ribs 9a, 9b, 9
The depths of c and 9d are preferably equal to or deeper than the depth of the lateral reinforcing ribs 10.

Further, the front and rear wall surfaces of the body portion 3 which face each other,
That is, the panel portion 11 provided at a position slightly lower than the central portion of the wall surface 5 on the front side of the body portion and the wall surface 6 on the rear side of the body portion is the bottle 10
Although it is provided to easily apply force when the 0 is flatly folded to reduce the volume and also to easily hold the bottle 100, it also has an effect to reinforce the buckling strength of the bottle body 3. It is a thing. Such a panel unit 11 is
By providing it in a shape that is recessed from the outer peripheral surface of the body portion 3 like the molding recessed portion 12a shown in the figure, it is easy to apply force with fingers, it is easy to hold the bottle 100, and the reinforcing effect of the body portion 3 can be improved. Although preferable, the present invention is not limited to this, and for example, a frame-shaped concave groove may be provided on the periphery. For example, a vertical concavo-convex strip (not shown) may be provided on the surface of the panel portion 11 to further improve the buckling strength reinforcing effect and the slip preventing effect. Further, the shape of the panel portion 11 is not particularly limited, and it may be provided in any shape such as a circular shape or an elliptical shape in addition to the illustrated rectangular shape.

Next, the volume-reducible bottle 200 shown in FIGS. 4, 5, and 6 has a rectangular shape in the structure of the volume-reducible bottle 100 shown in FIGS. 1, 2, and 3. The shape of the bottle is changed from a rectangular cross section to a square shape as shown in the plan view of FIG. 6, and as shown in the side view of FIG. Side wall surface 7, 8
A vertical bending rib 9a provided on the upper surface and an oblique bending rib 9b which is connected to the lower end of the rib 9a in a bifurcated manner.
The inverted Y-shaped bending rib 9c composed of 9c is changed to a convex groove shape that is convex outward instead of the concave groove shape, and the convex groove-shaped bending ribs 9a, 9b and 9c are formed on the body portion 3. The ribs 9 for bending so as not to project outward from the outer peripheral surface of the
A certain area including a, 9b and 9c is formed by recessing into a wide inverted Y-shape like the molding recess 12b, and further, as shown in the front view of FIG. The configuration is such that the shape of the panel portion 11 provided at a position slightly lower than the central portion of FIG.
~ It is formed and configured in the same manner as the volume-reducible bottle 100 shown in Fig. 3.

By adopting such a configuration, the body portion 3
Has a square cross section and the four wall surfaces around the body portion 3 have the same width, so that the force is evenly applied to the body swelling and the strength of the bottle 200 is stable. Further, the fact that the inverted Y-shaped bending ribs 9 provided on the left and right side wall surfaces 7 and 8 of the bottle 200 are changed to the convex groove shape that is convex outward is that when the bottle 200 is flatly folded, The character-shaped bending rib 9 can be folded by folding it inward, but if anything, it has a shape suitable for being folded outward.

Since a certain area including the bending ribs 9a, 9b and 9c provided on the left and right side wall surfaces 7 and 8 is recessed by the wide inverted Y-shaped forming concave portion 12a, the convex groove shape is used for bending. The ribs 9a, 9b, 9c do not project from the outer peripheral surface of the body portion 3 and are not damaged, and this portion also acts as a reinforcing rib in the vertical direction, so that the buckling strength of the body portion 3 can be further improved. In addition, 5, 6 on the front and rear wall surfaces of the body portion 3
Regarding the point that the shape of the panel portion 11 provided at a position slightly lower than the center portion of the
Ease of applying force to fold 0 flatly, bottle 200
There is no big difference in the action and effect such as the ease of grasping when holding, and the same action and effect as the action and effect described in the bottle 100 shown in FIGS. 1 to 3 can be obtained.

[0033]

EXAMPLES The present invention will be described more specifically below with reference to examples. (Example 1) A volume-reducible bottle 100 having the structure shown in FIGS. 1 to 3 was prepared by using polyethylene terephthalate.
It was produced by axial stretch blow molding with the following dimensions. The height of the bottle 100 is 235 mm, the cross section of the body 3 is rectangular, the width of the body 3 (the distance between the left and right side wall surfaces 7, 8) is 101 mm, the depth of the body 3 (the front and rear wall surfaces 5). , 6) is 82 mm, and the left and right side wall surfaces 7 of the body 3 are
Inverted Y-shaped bending ribs 9a, 9b, 9c provided in FIG.
Among them, the vertical bending rib 9a is provided vertically downward from the upper edge of the body portion 3 to a height position of 41 mm from the bottom surface, and from there, it is divided into two and is below the respective side wall surfaces 7 and 8. Ribs 9b for bending diagonally to the vicinity of both corners of
9c is provided, and a lateral bending rib 9d is provided on the entire circumference of the body portion 3 at a height position of 41 mm from the bottom surface.
Further, the lateral reinforcing ribs 10 of the body portion 3 include four reinforcing ribs 10 on the upper side of the lateral bending ribs 9d so that the upper edge of the body portion is divided into substantially equal intervals. One lateral reinforcing rib 10 is provided on the entire circumference around the boundary of the bottom portion 4 below the lateral bending rib 9d. A square panel portion 11 having a side length of 40 mm was provided at a depth of 2.5 mm at a position slightly lower than the central portions of the front and rear wall surfaces 5 and 6 of the body portion 3.
The average thickness of the peripheral wall of the bottle 100 excluding the mouth portion 1 is 0.
27 mm, filling capacity of bottle 100 is 1200 ml
And

The volume-reducible bottle 100 of Example 1 manufactured as described above can safely seal liquid contents such as beverages, and the empty bottle is provided on the peripheral wall surface of the body 3. By using the folding ribs 9a, 9b, 9c, 9d, it was possible to easily fold it flatly in the longitudinal direction to reduce the volume. It was also possible to further fold the flatly folded bottle so as to roll it up from the bottom side to the upper side by utilizing the lateral reinforcing ribs 10 to further reduce the volume.

Example 2 A volume-reducible bottle 200 having the structure shown in FIGS. 4 to 6 was produced by the biaxial stretch blow molding using polyethylene terephthalate in the following dimensions. The height of the bottle 200 is 235 mm, the cross section of the body 3 is a square with a side length of 87 mm, that is, the width of the body 3 (the distance between the left and right side wall surfaces 7, 8) is 87 mm,
The depth of the body 3 (distance between the front and rear walls 5, 6) is also 87 m
m, and of the inverted Y-shaped bending ribs 9a, 9b, 9c provided on the left and right side wall surfaces 7, 8 of the body portion 3, the vertical bending rib 9a is perpendicular to the upper edge of the body portion 3. It is provided up to a height position of 43.5 mm from the bottom surface, and below that, there are provided bifurcating ribs 9b, 9c for dividing the fork into the vicinity of the lower corners of the side wall surfaces 7, 8 respectively. Further, lateral bending ribs 9d are provided on the entire circumference of the body portion 3 at a height position of 43.5 mm from the bottom surface.

The inverted Y-shaped bending rib 9a,
9b and 9c are provided in a convex groove shape that is convex outward, and a certain area including the reverse Y-shaped bending ribs 9a, 9b and 9c is recessed by a wide reverse Y-shaped forming concave portion 12b, and the reverse shape is formed. Y
The character-shaped bending ribs 9a, 9b, 9c are formed so as not to project from the outer peripheral surface of the body portion 3, and the lateral bending ribs 9d are formed in a concave groove shape as in the first embodiment. It was formed.

The lateral reinforcing ribs 10 of the body 3 are
Also in this case, as in the case of the first embodiment, four reinforcing ribs 10 are provided on the entire circumference on the upper side of the lateral bending rib 9d so that the upper edge of the body is divided into substantially equal intervals. Below the lateral bending rib 9d, at the boundary with the bottom 4,
The lateral reinforcing ribs 10 of the book are provided on the entire circumference. Then, a circular panel portion 11 having a diameter of 40 mm is formed at a depth of 2. at a position slightly lower than the center of the front and rear wall surfaces 5 and 6 of the body portion 3.
It was provided with a depression of 5 mm. The average thickness of the peripheral wall of the bottle 200 excluding the mouth portion 1 is 0.26 mm.
The filling volume of was 1200 ml.

The volume-reducible bottle 200 of Example 2 manufactured as described above can safely seal liquid contents such as beverages, and the empty bottle is provided on the peripheral wall surface of the body 3. By using the folding ribs 9a, 9b, 9c, 9d, it was possible to easily fold it flatly in the longitudinal direction to reduce the volume. It was also possible to further fold the flatly folded bottle so as to roll it up from the bottom side to the upper side by utilizing the lateral reinforcing ribs 10 to further reduce the volume.

[0039]

As described above in detail, according to the present invention, a plastic bottle is formed into a rectangular tubular shape, and its peripheral wall surface can be made thin without impairing the performance as a bottle. It is possible to save resources, save energy, and is economical, and it is possible to fold an empty bottle after use easily and compactly to reduce the volume.
It has the effect of being able to provide, with good productivity, a bottle that can be reduced in volume and has excellent processability and transportation efficiency during recycling and disposal.

[Brief description of drawings]

FIG. 1 is a front view showing the configuration of an embodiment of a volume-reducible bottle of the present invention.

2 is a side view of the volume-reducible bottle shown in FIG. 1. FIG.

3 is a plan view of the volume-reducible bottle shown in FIG. 1. FIG.

FIG. 4 is a front view showing the configuration of another embodiment of the volume-reducible bottle of the present invention.

5 is a side view of the volume-reducible bottle shown in FIG. 4. FIG.

6 is a plan view of the volume-reducible bottle shown in FIG. 4. FIG.

[Explanation of symbols]

1 mouth 2 shoulder 3 torso 4 bottom 5 Front wall of the body 6 Wall behind the trunk 7 Side wall on the left side of the trunk 8 Side wall on the right side of the trunk 9 Reverse Y-shaped bending rib Ribs for bending 9a, 9b, 9c, 9d 10 Reinforcing rib 11 panel section 12a, 12b Molding recess 13 male screw 14 Flange 100,200 Bottles that can be reduced in volume

Claims (5)

[Claims] 1. A mouth, a shoulder, a body and a bottom,
The body part is a molded plastic bottle having a rectangular cross-section in the shape of a rectangular tube, and of the four peripheral wall surfaces forming the body part, at least the two central wall parts facing each other in the width direction. In addition, a rib for bending in the vertical direction for facilitating flat folding of the bottle in the vertical direction is provided with a height corresponding to at least half the distance between the wall surfaces adjacent to both sides from the upper edge of the body. A bottle that can be reduced in volume because it is installed up to the position. 2. The rib for bending in the vertical direction is provided vertically from at least the upper edge of the body portion to the height position, and is divided into two forks from the height position to a lower part of the wall surface. The volume-reducible bottle according to claim 1, wherein the bottle is provided in an inverted Y shape toward both corners. 3. Half of the distance between the wall surfaces of the bottle adjacent to both sides of the wall surface provided with ribs for bending in the vertical direction.
The lateral bending ribs are further provided at a height position corresponding to the above, on the entire circumference of the bottle or on the half circumference connecting the longitudinal bending ribs on both sides of the bottle. The volume-reducible bottle described. 4. The bottle has an average thickness of a peripheral wall excluding its mouth portion of 0.1 to 0.7 mm, and, apart from the bending rib, a lateral reinforcing rib is provided on the body peripheral wall. 4. The volume-reducible bottle according to claim 1, wherein a plurality of the bottles are provided at appropriate intervals. 5. A central portion of two facing wall surfaces different from the facing two wall surfaces provided with the longitudinal bending ribs,
When folding the bottle to reduce the volume, it is easy to apply force, and the panel part for making it easier to hold the bottle,
The volume-reducible bottle according to any one of claims 1 to 4, wherein the panel portion is formed in a concave shape or is formed by forming a concave groove around the panel portion.