JP2001039424A - Injection molded bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To squash a bottle flat in the horizontal direction to reduce the volume thereof, and to facilitate the recovery and carriage of a large mass thereof during the recycling operation by arranging a sinusoidal parting line on a bottom part of the bottle across a folding stripe, and alternately demarcating thick-walled portions and thin-walled portions on the bottom part. SOLUTION: A folding straipe 2 leading from a body part to a bottom surface 3 is formed on parts opposite to each other on a circumferential surface. A sinusoidal parting line 4 is arranged on the bottom surface 3 across the folding stripe 2. In the bottom part to be demarcated by the parting line 4 and the folding stripe 2, a thick-walled part A and a thin-walled part B are alternately formed on a part closer to a ridge or a valley of the parting line 4, and a part farther therefrom, respectively. The thick-walled parts A are closer to the parting line 4 even when they are thick in wall, and transmit the force without any loss, and thus when the pressure 5 is applied from the thick-walled parts A to the thinwalled parts B, the PET bottle 1 can be easily squashed flat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an injection-molded bottle used as a drinking water container, that is, a so-called PET bottle.

[0002]

2. Description of the Related Art In order to facilitate collection and processing of PET bottles for recycling, there is a PET bottle in which a body is formed in a bellows shape, and an empty container is folded up and down to be crushed to be small.

[0003] A PET bottle is formed by providing irregularities on the bottom, and maintains stability and strength by its shape resistance. or,
The bottom parting line is formed as a straight line.

[0004]

One of the most popular drinking water containers together with cans and bottles is a so-called PET bottle made by injection molding. It is desirable to manufacture these PET bottles and the like from the beginning for environmental conservation and resource reuse in consideration of recycling.

[0005] Therefore, it is necessary to manufacture a bulky used PET bottle so that it can be processed into a small size in order to facilitate collection and transportation for recycling.

However, even if the body of the plastic bottle is formed in a bellows shape, and the empty container is crushed in the vertical direction, it is still bulky, inconvenient to collect and transport in large quantities, and it is necessary to efficiently recycle it. Can not.

Further, the bottom of the PET bottle is required to have a higher strength than the body or the like, so that it must be formed firmly. The part had to be crushed in the vertical direction by forming a bellows shape or the like. However, as described above, the compression process in the vertical direction is still bulky, and it is inconvenient to collect and transport a large amount of empty PET bottles.

Accordingly, an object of the present invention is to manufacture a PET bottle that can be squashed horizontally and processed thinly, to facilitate bulk collection and transportation by reducing the bulk, and to carry out recycling efficiently.

[0009]

A folding line formed of two grooves extending from the body to the bottom is provided on the opposite portion of the peripheral surface of the PET bottle.

In addition, a folding line consisting of two grooves extending from the body to the bottom is provided at the opposite portion of the peripheral surface of the plastic bottle, and a parting line consisting of a sinusoidal curve is substantially intersected with the folding line at the bottom. To be provided. In addition,
The bottom portion of the PET bottle defined by the parting line and the folding line is formed alternately so that the portion closer to the valley or mountain of the parting line is thicker and the farther portion is thinner.

The bottom of the plastic bottle is formed alternately in the thick and thin portions, and the originally straight parting line is formed into a sine curve, so that the plastic bottle can be folded from the left to the right in the direction from the thin portion to the thick portion. It is. Also, the two folds formed by two grooves provided on the opposite peripheral surfaces of the plastic bottle facilitate folding in the lateral direction, and the central convex portion serves as a rib, thereby reinforcing the strength of the plastic bottle. .

[0012]

Next, the most preferred embodiment of the present invention will be described.

FIG. 1 is a front view of a plastic bottle 1 according to the present invention. The plastic bottle 1 includes a screw-type mouth 1a, a body 1b, and a bottom 1c. A fold line 2 extending from the body 1b to the bottom surface 3 is formed at a portion of the peripheral surface of the plastic bottle 1 opposite to the fold line.

FIG. 2 is an enlarged plan view of the crease 2. The crease 2 is composed of two grooves 2a, and a projection 2b is formed at the center. The protruding portion 2b serves as a rib for reinforcing the PET bottle body 1b or the like which becomes thin by providing the folding line 2.

FIG. 3 is a bottom view of the PET bottle 1 according to the first embodiment. The bottom surface 3 has two grooves 2a extending from the body 1b.
A folding line 2 is provided.

FIG. 4 is a front view of the PET bottle 4 according to the second aspect, and FIG. 5 is a bottom view of the PET bottle 4 according to the second aspect. The body 4
A folding line 6 extending from b to the bottom surface 5 is formed. The bottom surface 5 is provided with a parting line 7 consisting of a sine curve crossing the crease 6-6. The bottom part 4c defined by the parting line 7 and the crease line 6-6 is alternately formed with a thicker part A at a distance closer to the peak or valley of the parting line 7 and a thinner part B at a farther distance. I do. The part A has a small shape resistance because the distance from the parting line 7 is short even though it is thick, and the force from the thin part to the thick part as shown by the arrow 8-8, that is, the force from the left and right in the direction A from B When added, it can be easily folded flat.

FIG. 6 is an explanatory diagram of the bottom surface showing a state in which the plastic bottle 4 is folded. When a force is applied from the left and right sides of the plastic bottle toward the center, the groove 6a of the crease line 6-6 is crushed and overlaps with the convex portion 6b, and on both sides thereof, a thick bottom portion A portion is formed. The bottom portion B overlaps, and the PET bottle can be crushed flat in the lateral direction.

[0018]

According to the present invention, by providing a folding line on the body, flattening can be easily performed in the lateral direction. By providing the folding line, the thin PET bottle can be reinforced by the convex portion at the center of the folding line.

By forming a folding line on the peripheral surface and alternately forming a thick and thin portion at the bottom of the PET bottle, which has maintained its strength by increasing the thickness, the shape resistance in the lateral direction can be reduced.
Furthermore, the folding is made easier by transforming the parting line into a sinusoidal curve.

As a result, empty PET bottles that can be folded only in the vertical direction and are still bulky can be crushed flat, collected and transported in large quantities, and the efficiency of recycling can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a plastic bottle according to claim 1. FIG.

FIG. 2 is an enlarged plan view of a folding line of the PET bottle.

FIG. 3 is a bottom view of the same.

FIG. 4 is a front view of the plastic bottle according to claim 2;

FIG. 5 is a bottom view of the same.

FIG. 6 is an explanatory diagram showing a state of a folded bottom surface.

[Explanation of symbols]

1, 4, PET bottles 2, 6, Fold lines 3, 5,
Bottom 7, parting line

[Procedure amendment]

[Submission date] April 13, 2000 (2004.1.
3)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Injection molded bottle

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an injection-molded bottle used as a drinking water container, that is, a so-called PET bottle.

[0002]

2. Description of the Related Art There is a PET bottle whose bellows are formed in a bellows shape so as to facilitate collection and processing of the PET bottle for recycling, and the volume can be reduced by crushing an empty container in a vertical direction.

[0003] A PET bottle is formed by forming irregularities on the bottom, and maintains stability and strength by its shape resistance. or,
The bottom parting line is formed as a straight line.

Japanese Patent Application Laid-Open No. H10-152119 discloses an invention in which a folding line is provided in a longitudinal direction of a plastic bottle to facilitate crushing.
In addition, there is JP-A-10-338220, but the thickness of the bottom of the bottle is constant and the shape resistance from the lateral direction is large, and it is difficult to completely crush the bottle.

[0005]

One of the most popular drinking water containers together with metal cans and glass bottles is the so-called plastic bottle made by plastic injection molding. It is desirable to manufacture these PET bottles from the beginning for environmental protection and resource reuse, with consideration given to recycling.

[0006] Therefore, it is necessary to manufacture a used PET bottle which is bulky in a container as it is and can be processed to a small volume in order to facilitate collection and transportation for recycling.

However, even if the body of the PET bottle is formed in a bellows shape and the empty container is crushed in the vertical direction, the bottom portion is still not crushed and bulky, and it is inconvenient and efficient to collect and transport a large amount. Can't recycle.

Further, the bottom of the PET bottle is required to have a higher strength than the body or the like, so it has to be formed firmly, and since the parting line is also straight, it is resistant to lateral pressure.
The only option was to crush the body of the PET bottle in the vertical direction by forming it in a bellows shape. However, as described above, the vertical crushing process is still bulky, and it is inconvenient to collect and transport a large amount of empty PET bottles.

Therefore, an object of the present invention is to manufacture a PET bottle which can be thinly processed by crushing it flatly in the lateral direction, and to reduce bulk to facilitate large-scale collection and transportation, and to efficiently recycle.

[0010]

SUMMARY OF THE INVENTION In an injection-molded bottle provided with a folding line consisting of two grooves extending from the body to the bottom at opposing portions of the peripheral surface of the PET bottle, the bottom has a sinusoidal part. The marking line is provided so as to substantially intersect the folding line. Furthermore, the bottom part of the PET bottle defined by the parting line and the folding line is formed alternately into a thick part at a part closer to a valley or a mountain of the parting line and a thin part at a part farther than the valley or mountain of the parting line. .

The bottom of the PET bottle is formed alternately into a thick portion and a thin portion, and the parting line, which is originally a straight line, is formed into a sine curve so that the PET bottle can be bulked from the thin portion to the thick portion from the lateral direction. It makes it possible to crush it low. In addition, two folds formed of two grooves provided on opposing peripheral surfaces of the PET bottle facilitate crushing in the lateral direction, and a central convex portion formed between the folds serves as a rib. It reinforces the strength of the bottle.

[0012]

Next, the most preferred embodiment of the present invention will be described.

FIG. 1 is a front view of a plastic bottle 1 according to the present invention. The plastic bottle 1 has a screw-fitting mouth 1a,
It consists of a body 1b and a bottom 1c. Folded lines 2 extending from the body 1b to the bottom surface 3 are formed on opposing portions of the peripheral surface of the PET bottle 1.

FIG. 2 is an enlarged view of the crease 2. Fold line 2
Is composed of two grooves 2a, and a convex portion 2b is formed at the center.
The protrusion 2b serves as a rib for reinforcing the PET bottle body 1b which is thinned by providing the folding line 2.

FIG. 3 is a bottom view of the plastic bottle 1. A parting line 4 consisting of a sine curve intersecting a crease 2-2 provided on the bottom surface 3 of the PET bottle 1 is provided. The bottom 1c of the plastic bottle 1 defined by the parting line 4 and the crease 2-2 is used for the portion A near the peak or the valley of the parting line 4, and the portion A far away is thin. Are alternately formed as a B part. Even if the portion A is thick, since the distance from the parting line 4 is short, the crushing force is transmitted without loss, and the portion A is thicker from the portion A to the portion B as shown by arrow 5-5. When pressure is applied, it can be crushed flat.

FIG. 4 is a bottom view showing a state in which the plastic bottle 1 is crushed. When pressure is applied to the peripheral surface of the plastic bottle 1 from the lateral direction toward the center, the groove 2 of the crease 2-2 is formed.
a is crushed and overlaps with the convex portion 2b, and on both sides thereof, the thick bottom A portion and then the thin bottom B portion overlap, and the PET bottle can be crushed flat.

[0017]

According to the present invention, a folding line is provided on the body, and a folding line is provided on the peripheral surface of the injection-molded bottle which can be flattened. By forming the part and the thin part alternately and transforming the parting line into a sinusoidal curve, the lateral crushing force of the bottle can be transmitted without loss, so that it can be easily crushed with a small amount of pressure. .

As a result, it is possible to crush flatly, collect a large amount, transport, and improve the efficiency of recycling.

[Brief description of the drawings]

FIG. 1 is a front view of an injection molded bottle according to the present invention.

FIG. 2 is an enlarged view of a folding line provided on a peripheral surface of the bottle.

FIG. 3 is a bottom view of the bottle.

FIG. 4 is a bottom view of the crushed bottle.

[Explanation of Signs] 1, PET bottle 2, Fold line 3, Bottom surface 4,
Parting line ────────────────────────────────────────────── ───────

[Procedure amendment]

[Submission date] April 13, 2000 (2004.1.
3)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Deleted

[Procedure amendment 4]

[Document name to be amended] Drawing

[Correction target item name] Fig. 6

[Correction method] Deleted

Claims (2)

[Claims] 1. An injection-molded bottle provided with a folding line formed of two grooves extending from a body to a bottom on opposing peripheral surfaces. 2. A folding line comprising two grooves extending from the body to the bottom is provided on the opposing peripheral surface, and a parting line consisting of a sinusoidal line intersecting the folding line is provided at the bottom. An injection-molded bottle characterized in that a portion close to the peak or valley of the parting line is made thicker and a part farther away from the crest or valley of the parting line is made thinner.