JP6735076B2 - Bottle with reinforced wall on the panel - Google Patents

Description

The present invention relates to bottles.

As a bottomed cylindrical bottle made of a synthetic resin material, conventionally, a mouth portion, a shoulder portion, a body portion and a bottom portion are continuously arranged in this order from above to below, exhibiting a circular shape in a cross-sectional view, A bottle has been proposed in which a label is wrapped around a body, and a panel is formed on the body that is recessed inward in the radial direction and extends vertically (see, for example, Patent Document 1).

JP, 2005-132452, A

However, such a bottle has a problem that the label wound around the body portion is broken when the bottle drops in an upright posture with the bottom portion facing downward. Therefore, as a result of intensive studies, the inventors of the present application have found that immediately after the bottle 100 is dropped as described above (see FIG. 5A), the lower part 101 of the bottle 100 is radially outward due to the impact of the drop. It has been found that the label 110 is torn due to a large bulging deformation (see FIG. 5B) (see FIG. 6). In particular, it has been found that the lower part of the label is easily torn when the label is formed with perforations that can be broken in the vertical direction.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a bottle in which a label is not easily broken when dropped in an upright posture.

The present invention adopts the following means in order to solve the above problems. That is, the bottle of the present invention, the mouth portion, the shoulder portion, the body portion and the bottom portion are continuously provided in this order from the upper side to the lower side along the bottle axis, and exhibit a circular shape in a cross-sectional view orthogonal to the bottle axis, A bottle in which a label is wrapped around at least a lower end portion of the body portion, wherein the body portion is recessed inward in a radial direction orthogonal to the bottle axis in a plan view viewed from the bottle axis direction, the bottle. A panel portion extending along the axial direction to the lower end portion of the body is formed, the panel portion is located in the center, and extends along the bottle axial direction, and an outer peripheral edge of the bottom wall surface. And an inclined wall surface that gradually inclines toward the inner side in the radial direction toward the bottom wall surface side and an outer peripheral edge of the inclined wall surface, and gradually extends outward in the radial direction toward the bottom wall surface. A sloped U-shaped middle slanted wall surface that opens downward, and a lower end portion of the slanted wall surface that is continuous with a lower end of the bottom wall surface has a bottle shaft that gradually extends toward the bottom wall surface. The circumferential size along the circumference is shortened, a reinforcing wall surface having a triangular shape is formed when viewed from the outside in the radial direction, and one of the three corners of the reinforcing wall surface is connected to the lower end of the bottom wall surface. It is characterized by being.

In the present invention, a boundary portion such as a valley line is formed between the reinforcing wall surface and the portion adjacent to the wall surface of the inclined wall surface, so that the rigidity of the lower end portion of the inclined wall surface against the outward deformation in the radial direction is increased. be able to. As a result, even if the bottle is dropped in the upright posture, the lower end of the inclined wall surface is less likely to bulge outward in the radial direction due to a drop impact, and the label wound around at least the lower end of the body is less likely to be torn. ..
Moreover, since the inclined wall surface including the reinforcing wall surface is gradually inclined toward the inner side in the radial direction as it goes toward the bottom wall surface side, for example, a valley line is provided between the reinforcing wall surface and the portion adjacent to the inclined wall surface. Even if a boundary part such as is formed, it does not prevent the panel part from being deformed inward in the radial direction when the pressure in the bottle is reduced. As a result, the reduced pressure absorption performance of the panel portion can be maintained.
As described above, it is possible to obtain a bottle in which the label is not easily broken when the bottle is dropped while maintaining the reduced pressure absorption performance of the panel portion, and it is possible to improve the handleability of the bottle.

In the bottle of the present invention, the lower end portion of the inclined wall surface may be smaller in size in the circumferential direction than the upper end portion of the inclined wall surface that is continuous with the upper end of the bottom wall surface.
In this case, the size of the lower end portion of the inclined wall surface in the circumferential direction is smaller than the upper end portion of the inclined wall surface, so that the lower end portion of the inclined wall surface is less likely to bulge outward in the radial direction due to the above-described drop impact. This makes it more difficult for the label wrapped around the body to tear.

According to the bottle of the present invention, it is possible to obtain a bottle in which the label is not easily broken when the bottle is dropped while maintaining the reduced pressure absorption performance of the panel portion.

It is a side view which shows the bottle concerning one Embodiment of this invention. It is an enlarged view which shows the panel part of FIG. FIG. 3 is a cross-sectional view taken along the line AA showing the panel portion of FIG. 2. It is a BB arrow sectional view showing the panel part of FIG. It is a photograph which shows the shape change of the conventional bottle when dropping it. It is a photograph which shows the state of the label when the conventional bottle with the label wrapped around the body is dropped.

Hereinafter, the bottle concerning one embodiment of the present invention is explained based on a drawing. In each drawing used in the following description, the scale is appropriately changed in order to make each member recognizable.

The bottle 1 according to the present embodiment is integrally formed of synthetic resin such as polyethylene terephthalate by, for example, biaxial stretching blow molding, and as shown in FIG. It has a shoulder 12, a cylindrical body 13, and a bottomed cylindrical bottom 14, and has a circular shape in a cross-sectional view orthogonal to the central axis of the bottle.
Here, the mouth portion 11, the shoulder portion 12, the body portion 13, and the bottom portion 14 are arranged such that their respective central axes are located on the common axis. Hereinafter, this common axis is referred to as a bottle axis O, and in FIG. 1, the direction from the bottom portion 14 to the mouth portion 11 along the bottle axis O is upward and the opposite direction is downward. Further, in a plan view seen from the direction of the bottle axis O, a direction orthogonal to the bottle axis O is defined as a radial direction, and a direction around the bottle axis O is defined as a circumferential direction.

A cap (not shown) is attached to the mouth 11.
The shoulder portion 12 is connected to the lower end of the mouth portion 11 and has a truncated cone shape in which the inner diameter and the outer diameter gradually increase as the diameter decreases.

The body portion 13 is continuously provided at the lower end of the shoulder portion 12, and as shown in FIGS. 1 and 2, the body portion 13 is recessed inward in the radial direction and extends in a vertical direction. In the embodiment, six panel parts 21 are formed at equal intervals in the circumferential direction. As shown in FIG. 3, a portion of the body portion 13 located between the two panel portions 21 adjacent to each other in the circumferential direction is inscribed in a virtual circle C centered on the bottle axis O and extends in the vertical direction. It is the existing pillar portion 22.

The panel portion 21 has a rectangular shape whose outer edge is long in the vertical direction, and the lower end portion of the panel portion 21 is located at the lower end portion of the body portion 13. As shown in FIG. 2 to FIG. 4, the panel portion 21 is located in the central portion and extends in the up-down direction in an oval bottom wall surface 31 in a side view, and in a side view continuous to the outer peripheral edge of the bottom wall surface 31. A rectangular annular inner inclined wall surface (inclined wall surface) 32, a U-shaped middle inclined wall surface 33 that opens downward in a side view and is connected to the outer peripheral edge of the inner inclined wall surface 32, a lower end portion of the inner inclined wall surface 32, and a middle portion. The outer peripheral wall surface of the inclined wall surface 33 has a rectangular annular outer inclined wall surface 34 in a side view.

The bottom wall surface 31 is gradually recessed inward in the radial direction toward the central portion in the circumferential direction.
The inner sloping wall surface 32 surrounds the bottom wall surface 31 and includes an upper reinforcing wall surface 41 and a lower reinforcing wall surface (reinforcing wall surface) 42 that are separately provided at the upper end and the lower end that are respectively connected to the upper end and the lower end of the bottom wall 31. , And two side wall surfaces 43 and 44 which are respectively continuous with both side edges of the bottom wall surface 31.

The upper reinforcing wall surface 41 and the lower reinforcing wall surface 42 are flat surfaces that gradually incline toward the inner side in the radial direction toward the bottom wall surface 31 side. The upper reinforcing wall surface 41 located at the upper end of the inner inclined wall surface 32 has a circumferential width that decreases as it goes downward, and has a triangular shape when viewed from the outside in the radial direction. Similarly, the lower reinforcing wall surface 42 located at the lower end of the inner inclined wall surface 32 has a circumferential width that decreases as it goes upward, and has a triangular shape in a side view. A lower end that forms one of the three triangular corners of the upper reinforcing wall surface 41 is continuous with an upper end of the bottom wall surface 31, and an upper end that forms one of the three triangular corners of the lower reinforcing wall surface 42. Is connected to the lower end of the bottom wall surface 31. As a result, two upper valley lines 45 and 46 that form the lower end of the upper reinforcing wall surface 41 are formed at the boundary between the upper reinforcing wall surface 41 and the two side wall surfaces 43 and 44, and the lower reinforcing wall surface 42 and the two upper valley walls 45 and 46 are formed. Two lower valley lines 47 and 48 forming the upper end of the lower reinforcing wall surface 42 are formed at the boundary portions with the side wall surfaces 43 and 44.

The two side wall surfaces 43 and 44 are gradually inclined toward the inner side in the radial direction toward the bottom wall surface 31 side. The two side wall surfaces 43 are one of the two upper valley lines 45 and 46 of the upper reinforcing wall surface 41 (upper valley line 45) and one of the two lower valley lines 47 and 48 of the lower reinforcing wall surface 42 (lower valley line). The line 47) is connected to. Similarly, the side wall surface 44 is the other of the two upper valley lines 45 and 46 of the upper reinforcing wall surface 41 (upper valley line 46) and the other of the two lower valley lines 47 and 48 of the lower reinforcing wall surface 42 ( Shimotani line 48). In this way, the two side wall surfaces 43 and 44 surround the outer peripheral edge of the bottom wall surface 31 over the entire circumference together with the upper reinforcing wall surface 41 and the lower reinforcing wall surface 42.
The circumferential width at the upper end of the inner inclined wall surface 32 is wider than the circumferential width at the lower end of the inner inclined wall surface 32.

The middle sloping wall surface 33 surrounds the entire outer peripheral edge of the inner sloping wall surface 32 except the lower end, and gradually inclines radially outward toward the bottom wall surface 31 side.
The outer sloping wall surface 34 surrounds the lower end at the outer rim of the inner sloping wall surface 32 and the outer rim of the middle sloping wall surface 33 over the entire circumference, and gradually inclines radially inward toward the bottom wall surface 31 side. There is. The inner peripheral edge at the upper end of the outer inclined wall surface 34 and the outer peripheral edge at the upper end of the middle inclined wall surface 33 are connected by a flat connecting wall surface 49.
Further, as shown in FIG. 1, a first circumferential groove 51 that is recessed inward in the radial direction is formed in the connecting portion between the body portion 13 and the shoulder portion 12 over the entire circumference.

A second circumferential groove 52, which is recessed radially inward, is formed at the connecting portion between the bottom portion 14 and the body portion 13 over the entire circumference. By providing the first and second circumferential grooves 51, 52, the buckling strength of the bottle 1 is improved.
A label 55 is wrapped around the bottle 1 from the lower end of the shoulder 12 to the bottom 14. The label 55 is formed with one perforation (not shown) that extends over the entire length in the up-down direction and that makes it easy to peel off the label 55 from the bottle 1 by breaking. The perforation extends vertically in the circumferential center of the panel portion 21.

According to the bottle 1 configured as described above, the lower valley wall lines 42 and 47 are formed by the boundary portions of the lower reinforcing wall surface 42 by providing the lower reinforcing wall surface 42. Therefore, the lower end of the inner inclined wall surface 32 is formed. The rigidity of the portion against the outward deformation in the radial direction is increased, and it becomes difficult for the portion to bulge outward in the radial direction even when the bottle 1 is in an upright posture, and thus the handleability of the bottle 1 is improved. Here, since the width in the circumferential direction at the upper end portion of the inner inclined wall surface 32 is wider than the width in the circumferential direction at the lower end portion of the inner inclined wall surface 32, the lower end portion of the inner inclined wall surface 32 is radially larger than the upper end portion. It is hard to bulge due to the outside. As a result, the label 55 is less likely to be torn. Further, since the lower reinforcing wall surface 42 is inclined so as to be directed radially inward as it goes toward the bottom wall surface 31, the reduced pressure absorption performance of the panel portion 21 can be maintained.
Further, by providing the upper reinforcing wall surface 41 also on the upper end portion of the inner inclined wall surface 32, it is possible to stabilize the movement of the entire panel portion 21 due to the fluctuation of the internal pressure of the bottle 1 and maintain the appearance balance of the entire panel portion 21.

Next, the verification test of the above-described effects will be described.
As an example, a bottle in which an upper reinforcing wall surface 41 and a lower reinforcing wall surface 42 are formed on the inner inclined wall surface 32 is adopted. On the other hand, as a comparative example, a bottle in which a reinforcing wall surface was not formed on the inner inclined wall surface was used.
The bottles according to the examples and comparative examples were dropped in an upright posture, and a bottle drop test was performed to measure the drop height at which the label is broken by the drop impact.
Further, a carton drop test was carried out in which a plurality of bottles were stored in a carton in a standing state and the bottles were dropped in an upright posture. In the carton drop test, a 60 cm drop cumulative test is performed to determine if the label is torn when dropped from a height position of 60 cm for three consecutive cartons, and the drop height is increased by 10 cm until the label is broken. While performing a cumulative drop, a drop test was performed to measure the height when the label was broken.
Furthermore, the amount of change in the radial direction of the panel section when water was filled at 87° C. was measured for each of the bottles according to the example and the comparative example (the number of samples is 5, respectively).
The full volume of 87° C. water in the bottle is, for example, 542 ml.

As shown in Table 1, in the bottles according to the examples, it was clarified that by providing the reinforcing wall surface, the drop height is increased and the label is less likely to be broken by a drop impact. It was also found that the amount of change in the radial direction of the panel portion when filled with water at 87°C was small, and the heat resistance during hot filling was also improved.
Even if the reinforcing wall surface was provided, physical properties such as buckling strength of the bottle, rigidity of the body, and pressure resistance were not significantly changed.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
The reinforcing wall surfaces are formed on the inner inclined wall surfaces of all the panel portions. However, if there are a plurality of panel portions, the reinforcing wall surface may be formed on the inner inclined wall surfaces of at least one panel portion.
The shape of the reinforcing wall surface does not necessarily have to be an isosceles triangular shape, and may be another triangular shape as long as the width in the circumferential direction becomes smaller as it goes upward.
A valley line is formed at the boundary between the reinforcing wall surface and the side wall surface, but it is not necessary to form a clear valley line as long as the triangular reinforcing wall surface can be recognized.
The reinforcing wall surface may be formed on at least the lower end portion of the inner inclined wall surface.
Although the reinforcing wall surface is formed as a flat surface, the reinforcing wall surface may not be a flat surface as long as it is inclined toward the inner side in the radial direction toward the bottom wall surface.
The lower end portion of the inner inclined wall surface is smaller in size in the circumferential direction than the upper end portion of the inner inclined wall surface, but the upper end portion of the inner inclined wall surface may be equal to the circumferential size. The size in the circumferential direction may be larger than that of the upper end portion.
The label may be wrapped around at least the lower end of the body.

According to the present invention, industrial applicability is recognized for a bottle in which the label is not easily broken when the bottle is dropped in an upright posture.

1 bottle, 11 mouth part, 12 shoulder part, 13 body part, 14 bottom part, 21 panel part, 31 bottom wall surface, 32 inner wall surface (sloping wall surface), 42 lower reinforcing wall surface (reinforcing wall surface), 55 label, O bottle axis

Claims (2)

The mouth portion, the shoulder portion, the body portion and the bottom portion are continuously provided in this order from the upper side along the bottle axis toward the lower side, have a circular shape in a transverse cross-sectional view orthogonal to the bottle axis, and at least the lower end portion of the body section A bottle around which the label is wrapped,
In the body portion, a panel portion that is recessed toward the inner side in the radial direction orthogonal to the bottle axis in a plan view viewed from the bottle axis direction and extends to the lower end portion of the body portion along the bottle axis direction. Formed,
The panel portion is located in the center and is continuous with a bottom wall surface extending in the bottle axial direction and an outer peripheral edge of the bottom wall surface, and is gradually inclined toward the inside in the radial direction toward the bottom wall surface side. A sloped wall surface, and a U-shaped middle sloped wall surface that is continuous with the outer peripheral edge of the sloped wall surface, gradually slopes outward in the radial direction toward the bottom wall surface, and opens downward .
At the lower end portion of the inclined wall surface that is continuous with the lower end of the bottom wall surface, the size in the circumferential direction along the circumference of the bottle axis gradually decreases toward the bottom wall surface side, and is triangular when viewed from the outside in the radial direction. A reinforced wall surface is formed,
A bottle, wherein one of the three corners of the reinforcing wall surface is connected to the lower end of the bottom wall surface. The bottle according to claim 1, wherein a lower end portion of the inclined wall surface is smaller in size in the circumferential direction than an upper end portion of the inclined wall surface that is continuous with an upper end of the bottom wall surface.