JP2019156483A - Plastic bottle - Google Patents

Abstract

To propose a configuration capable of ensuring both desired content and improved gripping property (easy-to hold property).SOLUTION: A plastic bottle 1 includes a holding part Hb having a large constricted part P2 constricted so as to approach a central axis C of the plastic bottle 1 and a small constricted part P1 formed on both sides of the large constricted part P2 in an axial direction of the central axis C.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a plastic bottle filled with a beverage or the like, and more particularly to a technique for improving the physical properties and usability of a container and realizing a desired internal volume.

  In recent years, efforts have been made to reduce the weight of plastic bottles for the purpose of reducing environmental impact and reducing costs by reducing the amount of resin. However, while requiring weight reduction, the physical properties of containers (load resistance strength) are ensured. In addition, there is still a high demand for usability such as gripping property (ease of holding) and a technology capable of realizing a desired internal capacity.

In order to realize the above-described requirements, it has been conventionally performed to form various irregularities on a plastic bottle.
For example, Patent Document 1 discloses a configuration in which a linear annular rib sandwiched between two wavy concave ribs having a phase shift is provided at the center of the body.
Patent Document 2 discloses a configuration in which reinforcing ribs (annular ribs) sandwiched between two wavy lines of transfer deviation are provided in the body portion.

JP2015-85986A JP 2006-16076 A

  As disclosed in the above-mentioned patent documents, in conventional plastic bottles, it is common to provide an annular rib for the purpose of ensuring the physical properties (load resistance strength) of the container.

  On the other hand, in a plastic bottle, for example, it is necessary to secure a desired internal volume such as 660 ml, 630 ml, 500 ml, etc., and there is a correlation between securing the internal volume and the design of the bottle. That is, if the bottle diameter is increased, the required internal capacity can be ensured. Therefore, in order to design a large-capacity bottle, a large diameter is adopted at all locations of the bottle.

  For this reason, in the conventional plastic bottle, in order to secure a large capacity, a large diameter including a part to be grasped with fingers is adopted, so that it has to have a so-called cylindrical shape. It can be said that.

  Here, the inventors have found as a problem that when the size of the plastic bottle is a cylindrical body, the size around the body portion becomes large and it becomes difficult to grasp it with fingers. In particular, it has also been found as a problem that a bottle with a large content also increases the weight including a drink, so that it becomes more difficult to hold the bottle by holding it with fingers.

  Even in conventional plastic bottles, it can be said that there is a portion where the diameter is locally reduced by the annular rib, but this annular rib is mainly intended to improve the physical properties (load resistance strength) of the container. It can be said that it does not consider usability such as gripping (ease of holding).

  Therefore, in view of the above problems, the present invention proposes a configuration capable of satisfying both of securing a desired internal volume and improving gripping properties (ease of holding).

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, the present invention
A large constriction that is constricted to approach the central axis of the plastic bottle,
A small constriction formed on both sides of the large constriction in the axial direction of the central axis, the constriction having a smaller constriction than the large constriction,
It is set as the plastic bottle provided with the holding part which has this.

Also preferably,
The small constricted portion is continuously reduced in diameter along the first arc of the first curvature radius,
The large constricted portion is continuously reduced in diameter along the second arc of the second radius of curvature,
The second radius of curvature is assumed to be smaller than the first radius of curvature.

Also preferably,
On one side of the small constriction portion in the axial direction of the central axis, and on the other side, a boundary portion with the large constriction portion is formed,
An upper boundary contour is formed at one boundary,
A lower boundary contour is formed at the other boundary,
The width Ha in the axial direction of the central axis between the upper boundary contour line and the lower boundary contour line is:
It changes in the circumferential direction R centering on the central axis.

Also preferably,
It is assumed that the upper boundary portion outline and the lower boundary portion outline are sinusoidal and are out of phase with each other.

  According to the configuration of the present invention, it is possible to realize a configuration capable of achieving both a desired content capacity and an improvement in gripping property (ease of holding).

It is the whole plastic bottle side view concerning one embodiment of the present invention. It is an enlarged view of the part of a 2nd division and a 3rd division. It is a figure explaining the constriction comprised in the site | part of a 2nd division and a 3rd division. It is a schematic diagram explaining the shape of a constriction.

  FIG. 1 is an overall side view of a plastic bottle according to an embodiment of the present invention. In the following, for convenience of explanation, the upper side is defined as the upper side and the lower side is defined as the lower side in FIG.

The plastic bottle 1
A cylindrical mouth 10;
A shoulder 20 continuous with the mouth 10;
A torso 30 continuous with the shoulder 20;
The body part 30 and the bottom part 40 which continues are provided in order.

  Further, the bottom portion 40 is formed with a bottom surface 42 that comes into contact with the horizontal surface when the plastic bottle 1 is placed on the horizontal surface with the mouth portion 10 facing upward. A plurality of groove portions 44 that are continuous from the peripheral surface 43 to the bottom surface 42 of the bottom portion 40 are provided radially about the central axis C of the plastic bottle 1.

  In addition, although the plastic bottle 1 of a present Example is comprised with what is called a round bottle of a cylindrical shape, it can apply also to what is called a square bottle whose horizontal cross section is a rectangle. In addition, as for the filling material, carbonated beverages as well as beverages not containing carbonic acid such as Japanese tea, tea, water, coffee, etc. are naturally assumed.

  The trunk | drum 30 has four divisions in an up-down direction, and is set as the 1st division 31, the 2nd division 32, the 3rd division 33, and the 4th division 34 in an order from the top. Each section is defined by a circumferential rib.

  The uppermost first section 31 is divided into two large-diameter sections 31a and 31a by a circumferential rib 31b, and the large-diameter sections 31a and 31a have the maximum diameter R1 of the plastic bottle 1.

  The lowermost fourth section 34 is divided into two large-diameter sections 34a and 34a by a circumferential rib 34b, and the large-diameter sections 34a and 34a also have the maximum diameter R1 of the plastic bottle 1.

  As described above, the first section 31 and the fourth section 34 have the maximum diameter R1, and the line connecting the peripheral surfaces forming the maximum diameter R1 in the vertical direction is the first virtual line K1.

FIG. 2 is an enlarged view of portions of the second section 32 and the third section 33.
The second section 32 is further smaller than the first reduced diameter portion 32x and the first reduced diameter portion 32x, which is reduced in diameter so as to approach the central axis C of the plastic bottle 1 toward the lower side with respect to the first imaginary line K1. And a second reduced diameter portion 32y having a large change rate of the reduced diameter. Here, the “change rate of diameter reduction” is the amount of diameter reduction with respect to the unit length in the vertical direction, in other words, the inclination (center) of the peripheral surface of the first diameter reduction portion 32x. The inclination of the peripheral surface of the second reduced diameter portion 32y is larger than the inclination of the axis C (vertical line).

  The first reduced diameter portion 32x is provided with a circumferential rib 32b, and the first reduced diameter portion 32x is divided into two vertically. The rate of change in diameter of each section is the same, and the diameter continuously decreases as it goes downward across the circumferential rib 32b.

  The first reduced diameter portion 32x is configured to continuously reduce the diameter along the first arc M1 having the first curvature radius r1. In addition to being along the first arc M1, the diameter may be reduced along a straight line inclined with respect to the central axis C.

  Similarly, the second reduced diameter portion 32y is configured to continuously reduce the diameter along the second arc M2 having the second curvature radius r2. In addition to being along the second arc M2, the diameter may be reduced along a straight line inclined with respect to the central axis C.

  The second curvature radius r2 is set to be smaller than the first curvature radius r1, and the rate of change in diameter of the second reduced diameter portion 32y is larger than the rate of change in diameter reduction of the first reduced diameter portion 32x. It is said.

  In the present embodiment, the first radius of curvature r1 is 194 mm, and the second radius of curvature r2 is 25 mm.

  An upper boundary contour E1 is formed at the boundary G1 between the first reduced diameter portion 32x and the second reduced diameter portion 32y. The upper boundary portion contour E1 is configured to have a sinusoidal shape in a side view shown in FIG.

  In the present embodiment, the upper boundary contour E1 is configured to appear for a total of four periods in the circumferential direction of the plastic bottle 1, and configured to have a maximum amplitude of 3 mm.

  The above configuration of the second section 32 is similarly applied to the third section 33. That is, the third section 33 is smaller than the first reduced diameter portion 33x and the first reduced diameter portion 33x, which is reduced in diameter so as to approach the central axis C of the plastic bottle 1 toward the upper side with respect to the first virtual line K1. And a second reduced diameter portion 33y having a large change rate of the reduced diameter.

  Similar to the second section 32, the first reduced diameter portion 33x of the third section 33 is configured along the first arc M1, and the second reduced diameter section 33y is configured along the second arc M2.

  In the third section 33, a sinusoidal lower boundary portion contour E2 is formed at the boundary portion G2 between the first reduced diameter portion 33x and the second reduced diameter portion 33y. In the present embodiment, as shown in FIG. 3, a phase shift of a phase difference α is formed between the lower boundary portion contour E2 and the upper boundary portion contour E1. This phase difference α can be set at, for example, 0 degree or more and less than 90 degrees. In FIG. 3, the phase difference between the portion having the largest amplitude on the upper boundary contour E1 and the portion having the largest amplitude on the lower boundary E2 is shown as the phase difference α. .

  Further, as shown in FIG. 2, a circumferential rib 35 is formed between the second section 32 and the third section 33. At the portion of the circumferential rib 35, the minimum diameter of the body portion 30 is configured.

  FIG. 3 is a diagram for explaining the constriction formed in the second compartment 32 and the third compartment 33, and FIG. 4 is a schematic diagram for explaining the shape of the constriction. Note that the dimensional ratios shown in FIG. 4 are displayed at a ratio different from that in FIG. 3 for convenience of explanation.

  As shown in FIGS. 3 and 4, the first virtual line K1 and the first arc M1 intersect at intersections m1 and m1, and the point U1 closest to the central axis C side in the first arc M1 is the first arc. It is separated from the virtual line K1 by a distance B1. In other words, the first arc M1 is configured to move from the first imaginary line K1 to the central axis C side by the distance B1, thereby forming the small constricted portion P1. The small constricted portion P1 is configured in a region above the upper boundary portion contour line E1 in the second partition 32 and a region below the lower boundary portion contour line E2 in the third partition 33, respectively.

  In order to form the small constricted portion P1, the distance B1 between the first virtual line K1 and the first arc M1 (the amount of movement (from the first virtual line K1 of the point U1 closest to the central axis C side to the central axis C side). The amount of movement)) can be 3 mm, for example, and can be 1 mm or more and 8 mm or less.

  Moreover, the small constriction part P1 is comprised by the continuous 1st circular arc M1 in the Example. That is, a series of constrictions are formed in the second section 32 and the third section 33. However, other than this, for example, constrictions along different arcs in the second section 32 and the third section 33 may be configured.

  Further, the point U2 closest to the central axis C side in the second arc M2 is separated from the first virtual line K1 by a distance B2. In other words, the second arc M2 is configured to move from the first imaginary line K1 to the central axis C side by a distance B2, thereby forming a large constricted portion P2.

  In order to form the large constricted portion P2, the distance B2 between the first virtual line K1 and the second arc M2 (movement amount (movement amount of the point U2 closest to the central axis C side to the central axis C side)) For example, it can be set to 5.5 mm, and in addition, it can be set within a range of 2 mm to 16 mm.

  And the grip part Hb is comprised in the approximate center part of the axial direction of the central axis C by the small constriction part P1 and the large constriction part P2 which are comprised as mentioned above. A label made of a plastic film (not shown) is wound around the grip portion Hb.

The present invention can be implemented as described above.
That is, as shown in FIGS.
A large constriction P2 constricted to approach the central axis C of the plastic bottle 1,
A small constriction portion P1 formed on both sides of the large constriction portion P2 in the axial direction of the central axis C and having a constriction smaller than the large constriction portion P2,
This is a plastic bottle 1 provided with a gripping portion Hb.

  Thereby, the narrow constricted portion P2 and the small constricted portion P1 can constitute a grip portion Hb having a small diameter, and can secure a superior gripability (usability) as compared with a narrow body type without a constriction. it can. Further, even when the internal capacity of the plastic bottle 1 is increased, the gripping ability can be secured by providing the gripping portion Hb. Further, since the two-stage constriction is formed, it is possible to visually recognize the grip portion Hb more easily, and the user can be guided to the grip portion Hb more easily. In particular, when a plastic film is wound around the gripping portion Hb, it is difficult for the user to recognize the gripping portion Hb because only the small constriction portion P1 has a small indentation. By the presence of the part P2, the presence of the gripping part Hb can be recognized more clearly by shrinking the plastic film on the large constricted part P2. Furthermore, between the small constriction part P1 and the large constriction part P2, boundary portions G1 and G2 (FIGS. 2 and 3) that form a convex shape on the outer side (opposite the center axis C) in the cross section can be formed, By the boundary portions G1 and G2 functioning as reinforcing portions, the container physical properties (load resistance strength) can be improved.

As shown in FIG.
The small constriction P1 is continuously reduced in diameter along the first arc M1 having the first curvature radius r1,
The large constriction P2 is continuously reduced in diameter along the second arc M2 having the second curvature radius r2.
The second curvature radius r2 is assumed to be smaller than the first curvature radius r1.

  Thereby, the peripheral surface of the small constriction part P1 and the large constriction part P2 is comprised by the circular-arc-shaped slope, and the structure which is easy to adapt to a finger | toe can be implement | achieved.

Also, as shown in FIGS.
On one side and the other side of the small constriction portion P1 in the axial direction of the central axis C, boundary portions G1 and G2 with the large constriction portion P2 are formed, respectively.
The upper boundary portion contour E1 is configured by the one side boundary portion G1,
The lower boundary portion contour E2 is configured at the other side boundary portion G2,
The width Ha in the axial direction of the central axis C between the upper boundary contour E1 and the lower boundary contour E2 is:
It changes in the circumferential direction R centering on the central axis C.

  As a result, as shown in FIG. 1, it is possible to configure a portion A1 and a narrow portion A2 where the width Ha between the outlines is wide, the thumb fits well in the wide portion A1, and the index finger fits in the narrow portion A2. It is possible to realize a configuration that is good, and it is possible to realize a configuration that is more excellent in gripping (usability).

Also, as shown in FIG.
The upper boundary part contour line E1 and the lower boundary part contour line E2 are each a sinusoidal shape and are assumed to be out of phase with each other.

  As a result, as shown in FIG. 1, it is possible to configure a portion A1 and a portion A2 having a wide width Ha between the contour lines, and the upper boundary contour line E1 and the lower boundary contour line E2 are periodic. Therefore, it is possible to realize a configuration that is more familiar to fingers.

1 plastic bottle 10 mouth part 20 shoulder part 30 trunk part 31 first section 31a large diameter section 31b circumferential rib 32 second section 32b circumferential rib 32x first reduced diameter part 32y second reduced diameter part 33 third section 33x first First reduced diameter portion 33y Second reduced diameter portion 34 Fourth section 34a Large diameter section 34b Circumferential rib 35 Peripheral rib 40 Bottom 42 Bottom surface 43 Perimeter surface 44 Groove C Center axis E1 Upper boundary contour E2 Lower boundary contour Line G1 Boundary part G2 Boundary part Ha Width Hb Grasping part K1 First virtual line M1 First arc M2 Second arc P1 Small constriction part P1 Large constriction part R1 Maximum diameter R Circumferential direction r1 First curvature radius r2 Second curvature radius α Phase difference

Claims (4)

A large constriction that is constricted to approach the central axis of the plastic bottle,
A small constriction formed on both sides of the large constriction in the axial direction of the central axis, the constriction having a smaller constriction than the large constriction,
A plastic bottle provided with a gripping part. The small constricted portion is continuously reduced in diameter along the first arc of the first curvature radius,
The large constricted portion is continuously reduced in diameter along the second arc of the second radius of curvature,
The second radius of curvature is assumed to be smaller than the first radius of curvature.
The plastic bottle according to claim 1. On one side of the small constriction portion in the axial direction of the central axis, and on the other side, a boundary portion with the large constriction portion is formed,
An upper boundary contour is formed at one boundary,
A lower boundary contour is formed at the other boundary,
The width Ha in the axial direction of the central axis between the upper boundary contour line and the lower boundary contour line is:
Changes in the circumferential direction R about the central axis,
The plastic bottle according to claim 1 or 2, characterized in that. The upper boundary contour and the lower boundary contour are each sinusoidal and out of phase with each other.
The plastic bottle according to claim 3.

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