JP2022102280A - Plastic bottle - Google Patents

Abstract

To provide a novel technology for realizing further reduction in weight or improvement in rigidity in a plastic bottle formed with gripping recesses.SOLUTION: There is provided a plastic bottle 1 configured with a mouth 2, a shoulder 3, a barrel 4 and a bottom 5, and the barrel 4 has an upper barrel portion 4a, a lower barrel portion 4b, and a reduced barrel portion 4c between the upper barrel portion 4a and the lower barrel portion 4b. The plastic bottle comprises: gripping recesses 6 that are concaved inward of the bottle respectively in a front face of the reduced barrel portion 4c and at an opposed portion in a back face; a panel portion that is formed in a region defined by surrounding linear ribs centrally of the gripping recess 6; a plurality of circumferential ribs 12, 14 that are respectively recessed in the upper barrel portion 4a and in the lower barrel portion 4b; and bordering circumferential ribs 41, 42 that are recessed respectively in a boundary between the upper barrel portion 4a and the reduced barrel portion 4c and in a boundary between the lower barrel portion 4b and the reduced barrel portion 4c.SELECTED DRAWING: Figure 1

Description

The present invention relates to a plastic bottle filled with a beverage, and more particularly to a plastic bottle having a gripping recess in the body for holding a finger when gripping the container.

Conventionally, for example, as disclosed in Patent Document 1, a plastic bottle having a gripping recess in the body on which a finger is hung when gripping a container is known.

The configuration of the plastic bottle disclosed in Patent Document 1 is adopted in the form of a container having a relatively large capacity of about 2 liters, and is filled with various beverages such as tea-based beverages, mineral water, and sports drinks. It is a thing.

When the capacity reaches about 2 liters, the bottle filled with the beverage has a considerable weight, so that it is necessary to firmly apply force to grip the gripping recess when lifting. However, if the bottle is deformed by applying force, unexpected situations such as the contents being blown out and the bottle being dropped because it cannot withstand the weight will occur.

On the other hand, in the case of plastic bottles, attempts have been made to make the container as thin as possible in order to reduce the weight and cost by reducing the amount of resin used. In particular, the demand for so-called large plastic bottles having a capacity of about 2 liters is high.

However, since the rigidity decreases when the wall thickness is reduced, it is required to reduce the wall thickness while maintaining the rigidity. In other words, it is required to achieve both thinning and improvement of rigidity.

In addition, when the bottles in the stacked carton are compressed in the axial direction by the stacking pressure and the internal pressure increases during transportation or storage in the warehouse, the gripping recess is deformed so as to invert and swell outward. It is known that a so-called buckling that does not return to the above occurs. It is known that this buckling also occurs when it receives an impact such as dropping.

Japanese Unexamined Patent Publication No. 2020-90302

It is important to secure the rigidity of the gripping recess in order to further reduce the weight and further improve the rigidity by thinning the wall. Here, when the cartons are stacked and the stacking pressure acts on the bottle inside, it is preferable that the depth of the gripping recess is shallow in order to suppress the deformation of the bottle, but from the viewpoint of gripping property and strength at the time of gripping. Therefore, it is preferable that the gripping recess is deep.

Further, when deepening the gripping recess, it is necessary to consider a configuration in which buckling is particularly suppressed.

In view of the above, the present invention proposes a novel technique for further reducing the weight and further improving the rigidity of a plastic bottle in which a recess for gripping is formed.

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

In one embodiment of the invention, it has a mouth, shoulders, torso, and bottom, and the torso is an upper torso, a lower torso, and a contracted torso between the upper torso and the lower torso. A plastic bottle having a structure having a A panel portion composed of a region defined by linear ribs on all sides is formed.
A plurality of circumferential ribs are recessed in the upper body portion and the lower body portion, respectively, and at the boundary portion between the upper body portion and the contracted body portion and the boundary portion between the lower body portion and the contracted body portion, respectively. The boundary peripheral ribs are recessed, and the boundary peripheral ribs are shallower and narrower than the circumferential ribs formed on the upper body and the lower body, respectively. be.

Further, in one embodiment of the present invention, a circumferential rib is formed in the lower body portion, and the circumferential rib of the lower body portion is configured at a low position in the front left and right center portions of the lower body portion and the back surface. It is configured to have a horizontal portion, a horizontal portion formed at a high position in the central portion in the front-rear direction of the side surface, and an inclined portion provided so as to connect both horizontal portions, and is composed of a front surface and a back surface of the lower body portion. In, an upper horizontal rib is recessed between the uppermost circumferential rib and the contracted body portion.

Further, in one embodiment of the present invention, a circumferential rib is formed in the lower body portion, and the circumferential rib of the lower body portion is configured at a low position in the front left and right center portions of the lower body portion and the back surface. It is configured to have a horizontal portion, a horizontal portion formed at a high position in the central portion in the front-rear direction of the side surface, and an inclined portion provided so as to connect both horizontal portions, and on the side surface of the lower body portion. A lower horizontal rib is recessed between the lowermost circumferential rib and the bottom.

Further, in one embodiment of the present invention, a circumferential rib is formed in the contracted barrel portion by shifting the position up and down, and the upper side and the lower side of the panel portion are defined by the circumferential rib, and the gripping portion is gripped. In the vicinity of the periphery of the recess, each circumferential rib is provided with a vertical rib extending in the vertical direction.

According to one embodiment of the present invention, the rigidity is increased by the panel portion, the deformation when the force of the finger is applied is suppressed, and the buckling in which the gripping recess is bulged outward due to the load from the inside is also suppressed. can do. Further, since the panel portion is surrounded by ribs, the user can easily recognize the position when the finger is touched, and a configuration that is easy to grip is realized.
In addition, the ribs in the circumferential direction of the boundary are shallow and narrow in width to prevent the load from being concentrated too much near the contracted body, and the ribs are deformed so as to bend in a substantially "dogleg" shape. Can also be effectively suppressed.

Further, in one embodiment of the present invention, the upper part of the lower body portion can be reinforced by providing the upper horizontal rib.

Further, according to one embodiment of the present invention, the lower portion of the lower body portion can be reinforced by providing the lower horizontal rib.

Further, according to one embodiment of the present invention, reinforcement against deformation in the vertical direction of the plastic bottle is realized, and when a large compressive load is applied in the vertical direction, for example, the front side expands and the back side contracts. It is possible to effectively prevent deformation that bends in a character shape (sometimes it bends to the opposite side).

The figure which shows the composition of the front of a plastic bottle. The figure which shows the structure of the side surface of a plastic bottle. The figure which shows the structure of the contraction part. The figure which shows the structure of the recess for gripping. The figure which shows how the gripping recess is formed so as to be recessed in the inside of a bottle. The figure explaining the deformation of abbreviated shape.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following, for convenience of explanation, the upper side of the paper in FIG. 1 is the upper position, the lower side is the lower position, the left side is the left position, the right side is the right position, the vertical direction is the height direction, and the left-right direction is the width direction. do. Similarly, the left side of the paper in FIG. 2 will be described as the front side, the right side as the back side, and the left-right direction as the front-back direction. Further, in FIGS. 1 and 2, the central axis 1C of the plastic bottle 1 is displayed so as to be in the vertical direction.

FIG. 1 shows the shapes of the front surface and the back surface of the plastic bottle 1 which are configured to be substantially the same and face each other. FIG. 2 shows the morphology of two opposite sides of a plastic bottle 1 that are configured to be substantially identical.

The plastic bottle 1 according to the present embodiment shown in FIGS. 1 and 2 is suitably used for a thin-walled container having a relatively large capacity of about 2 liters, and is particularly suitable for tea-based beverages, mineral water, and the like. It is suitably used for aseptic filling of various beverages such as sports drinks.

The plastic bottle 1 is a so-called square bottle having a mouth portion 2, a shoulder portion 3, a body portion 4, and a bottom portion 5, and the body portion 4 is formed in a square cylinder shape.

The plastic bottle 1 can be manufactured, for example, by molding a preform made of a thermoplastic resin such as polyethylene terephthalate into a predetermined container shape by biaxial stretch blow molding or the like.

The mouth portion 2 is a cylindrical portion serving as a spout for the contents, and a cap (not shown) for sealing the inside of the container is detachably attached to the mouth portion 2. The lower end of the mouth 2 is connected to the upper end of the shoulder 3.

The shoulder portion 3 is configured to increase in diameter from the lower end side of the mouth portion 2 toward the upper end side of the body portion 4 so as to connect between the mouth portion 2 and the body portion 4.

The body portion 4 constitutes a portion from the lower end of the shoulder portion 3 to the bottom portion 5. The corner portion of the body portion 4 is chamfered to form a square cylinder having a rectangular cross-sectional shape.

The body portion 4 includes an upper body portion 4a, a lower body portion 4b, and a contracted body portion 4c. The contracted torso 4c constitutes a portion between the upper torso 4a and the lower torso 4b near the center in the height direction of the torso 4, and is warp than the upper torso 4a and the lower torso 4b. It is small and is formed to shrink inward of the container.

The upper body portion 4a is provided with a plurality of circumferential ribs 12 recessed in the horizontal direction along the circumferential direction, and the circumferential ribs 12 improve the rigidity of the upper body portion 4a. In this embodiment, five circumferential ribs 12 are arranged at substantially equal intervals in the vertical direction.

The lower body portion 4b is provided with a plurality of circumferential ribs 14 recessed so as to form a wave shape along the circumferential direction, and the circumferential ribs 14 improve the rigidity of the lower body portion 4b. In this embodiment, five circumferential ribs 14 are arranged at substantially equal intervals in the vertical direction.

As shown in FIGS. 1 and 2, the circumferential rib 14 formed in the lower body portion 4b includes a horizontal portion 14a formed at a low position in the front left and right center portions of the lower body portion 4b and the back surface. It is configured to have a horizontal portion 14b configured at a high position in the central portion in the front-rear direction of the side surface, and an inclined portion 14c provided so as to connect both the horizontal portions 14a and 14b. The inclined portion 14c is arranged at a position corresponding to the R chamfered corner portion in the lower body portion 4b.

As shown in FIG. 1, on the front surface and the back surface of the lower body portion 4b, an upper horizontal rib 16a is recessed between the uppermost circumferential rib 14 and the contracted body portion 4c, and the upper horizontal rib 16a is used. The upper part of the lower body portion 4b is reinforced. The arrangement of the upper horizontal rib 16a is possible by arranging the horizontal portion 14a of the circumferential rib 14 at a low position on the front surface and the back surface.

As shown in FIG. 2, on the side surface of the lower body portion 4b, a lower horizontal rib 16b is recessed between the lowermost circumferential rib 14 and the bottom portion 5, and is lowered by the lower horizontal rib 16b. The lower part of the body portion 4b is reinforced. The arrangement of the lower horizontal rib 16b is possible by arranging the horizontal portion 14b of the circumferential rib 14 at a high position on the side surface.

As shown in FIGS. 1 and 2, the circumferential ribs 18 and 19 are recessed in the constricted portion 4c in the horizontal direction along the circumferential direction. In this embodiment, two circumferential ribs 18 and 19 are formed, and a band-shaped convex portion 20 is formed between the two circumferential ribs 18 and 19.

Between the upper peripheral rib 18 and the upper body portion 4a, an inclined surface portion 31 that constitutes an inclined surface so as to shrink inward of the plastic bottle from the upper body portion 4a toward the circumferential rib 18 side is provided.

At the boundary between the upper body portion 4a and the inclined surface portion 31, that is, at the boundary portion between the upper body portion 4a and the contracted body portion 4c, the linear boundary portion circumferential rib 41 which is shallower and narrower than the circumferential rib 12 Is formed in the circumferential direction.

Between the lower peripheral rib 19 and the lower body portion 4b, an inclined surface portion 32 that constitutes an inclined surface so as to shrink inward of the plastic bottle from the lower body portion 4b toward the circumferential rib 19 side is provided.

A linear boundary peripheral rib 42 that is shallower and narrower than the circumferential rib 14 at the boundary between the lower body 4b and the inclined surface portion 32, that is, the boundary between the lower body 4b and the contracted body 4c. Is formed in the circumferential direction.

As described above, the boundary peripheral ribs 41 and 42 are shallower and narrower than the circumferential ribs 12 formed on the upper body 4a and the lower body 4b, so that the contracted ribs 4c have a narrower width. It is possible to prevent the load from being concentrated too close to the vehicle, and it is possible to effectively suppress the deformation such as bending in a substantially “dogleg” shape as shown in FIG.

As shown in FIGS. 3 to 5, gripping recesses 6 that are recessed into the inside of the bottle are provided at the center in the width direction of the contracted barrel portion 4c on the front side and the portion on the back side facing the center of the contracted portion 4c. .. In this way, by providing the gripping recess 6 facing the front side and the back side of the contracted body portion 4c, it is possible to hold the plastic bottle 1 by putting a finger on the gripping recess 6.

Further, by providing the gripping recess 6 in the contracted body portion 4c, a configuration is realized in which the fingertips can easily reach the gripping recess 6 even when the user's hand is small. It is assumed that the thumb is applied to the gripping recess 6 on the front side, and the index finger or the middle finger is applied to the gripping recess 6 on the back surface side.

As shown in FIG. 4, the vertical width of the gripping recess 6 is set so as to include the band-shaped convex portion 20 and the upper and lower circumferential ribs 18 and 19 inside. As shown in FIG. 5, the gripping recess 6 is configured so that the outside thereof is lower than the periphery by protruding inward of the plastic bottle, and the recessed portion 6 is formed in a band shape from the outside of the region within the lowered region. The convex portion 20 is formed so as to be depressed.

As shown in FIGS. 4 and 5, in the gripping recess 6, the band-shaped convex portion 20 is interrupted by two vertical ribs 22 and 22 in the vertical direction. As a result, the left and right vertical ribs 22 and 22 and the convex rectangular panel portion 25 surrounded by the upper and lower circumferential ribs 18 and 19 are formed.

Further, the formation of the panel portion 25 enhances the rigidity, suppresses the deformation when the force of the finger is applied, and suppresses the buckling in which the gripping recess 6 bulges outward due to the load from the inside. can do. Further, since the panel portion 25 is surrounded by ribs, the user can easily recognize the position when the finger touches the panel portion 25, and a configuration that is easy to grip is realized.

In addition to the shapes described above, the shape of the panel portion 25 may be, for example, a drum shape or a drum shape by forming the vertical ribs 22 and 22 into an arc shape, or may be inclined and parallel. It is also possible to make it a quadrilateral shape.

As shown in FIGS. 4 and 5, in the vicinity of the periphery of the gripping recess 6, the upper and lower circumferential ribs 18 and 19 are formed with convex vertical ribs 28 and 29 extending in the vertical direction. In this implementation, two vertical ribs 28 and 29 are formed on the left and right sides of the gripping recess 6 in the upper and lower circumferential ribs 18 and 19, respectively.

The vertical ribs 28 and 29 reinforce the plastic bottle 1 against deformation in the vertical direction, and when a large compressive load is applied in the vertical direction, for example, the front side expands and the back side contracts as shown in FIG. It is possible to effectively prevent deformation (which may bend to the opposite side) that bends in a substantially "<" shape.

Such deformation that bends in a substantially "dogleg" shape is particularly likely to occur in the form of a plastic bottle provided with a contracted barrel portion 4c, and the arrangement of the vertical ribs 28 and 29 (FIG. 4) is likely to occur. Therefore, this deformation can be effectively suppressed.

The present invention can be carried out as described above.
That is, as shown in FIGS. 1 to 5.
It has a mouth 2, a shoulder 3, a body 4, and a bottom 5.
The body portion 4 is a plastic bottle 1 having a structure including an upper body portion 4a, a lower body portion 4b, and a contracted body portion 4c between the upper body portion 4a and the lower body portion 4b.
Gripping recesses 6 that intrude into the inside of the bottle are provided on the front surface and the opposite portion on the back surface of the contracted body portion 4c, respectively.
In the central portion of the gripping recess 6, a panel portion 25 composed of a region defined by linear ribs on all sides is formed.

With this configuration, the rigidity is increased by the panel portion 25, the deformation when the force of the finger is applied is suppressed, and the buckling in which the gripping recess 6 bulges outward due to the load from the inside is also suppressed. can. Further, since the panel portion 25 is surrounded by ribs, the user can easily recognize the position when the finger touches the panel portion 25, and a configuration that is easy to grip is realized.

Also, as shown in FIG.
A plurality of circumferential ribs 12 and 14 are recessed in the upper body portion 4a and the lower body portion 4b, respectively.
At the boundary between the upper body 4a and the contracted body 4c, and at the boundary between the lower body 4b and the contracted body 4c, the boundary peripheral ribs 41 and 42 are recessed.
The boundary peripheral ribs 41 and 42 are shallower and narrower than the circumferential ribs 12 and 14 formed on the upper body 4a and the lower body 4b, respectively.
It is supposed to be.

In this way, the peripheral ribs 41 and 42 at the boundary are shallow and narrow in width, so that the load is prevented from being excessively concentrated near the contracted barrel 4c, and the ribs 41 and 42 have a substantially “dogleg” shape. Deformation that bends can also be effectively suppressed.

Further, as shown in FIGS. 1 and 2, a circumferential rib 14 is formed on the lower body portion 4b, and the circumferential rib 14 of the lower body portion 4b is a center on the left and right sides of the front surface and the back surface of the lower body portion 4b. A horizontal portion 14a configured at a low position in the portion, a horizontal portion 14b configured at a high position in the central portion in the front-rear direction of the side surface, and an inclined portion 14c provided so as to connect both horizontal portions 14a and 14b. On the front and back surfaces of the lower body portion 4b, the upper horizontal rib 16a is recessed between the uppermost circumferential rib 14 and the contracted body portion 4c.

By providing the upper horizontal rib 16a in this way, the upper portion of the lower body portion 4b can be reinforced.

Further, as shown in FIGS. 1 and 2, a circumferential rib 14 is formed on the lower body portion 4b, and the circumferential rib 14 of the lower body portion 4b is a center on the left and right sides of the front surface and the back surface of the lower body portion 4b. A horizontal portion 14a configured at a low position in the portion, a horizontal portion 14b configured at a high position in the central portion in the front-rear direction of the side surface, and an inclined portion 14c provided so as to connect both horizontal portions 14a and 14b. On the side surface of the lower body portion 4b, a lower horizontal rib 16b is recessed between the lowermost circumferential rib 14 and the bottom portion 5.

By providing the lower horizontal rib 16b in this way, it is possible to reinforce the lower portion of the lower body portion 4b.

Also, as shown in FIGS. 3 and 4.
Circumferential ribs 18 and 19 are formed on the contracted body portion 4c by shifting the positions up and down.
The upper side and the lower side of the panel portion 25 are defined by the circumferential ribs 18 and 19.
It is assumed that the vertical ribs 28 and 29 extending in the vertical direction are convexly provided on the circumferential ribs 18 and 19 in the vicinity of the periphery of the gripping recess 6.

As a result, reinforcement against deformation in the vertical direction of the plastic bottle 1 is realized, and when a large compressive load is applied in the vertical direction, for example, the front side expands and the back side contracts, as shown in FIG. It is possible to effectively prevent deformation that bends in a character shape (sometimes it bends to the opposite side).

1 Plastic bottle 2 Mouth 3 Shoulder 4 Body 4a Upper body 4b Lower body 4c Shrinking 5 Bottom 6 Gripping recess 12 Circumferential rib 14 Circumferential rib 14a Horizontal 14b Horizontal 14c Inclined 16a Upper horizontal Rib 16b Lower horizontal rib 18 Circumferential rib 19 Circumferential rib 20 Band-shaped convex portion 22 Vertical rib 25 Panel portion 28 Vertical rib 29 Vertical rib 31 Inclined surface portion 32 Inclined surface portion 41 Boundary portion Circumferential rib 42 Boundary portion circumferential direction rib

Claims (4)

Has a mouth, shoulders, torso, and bottom,
The body portion is a plastic bottle having a structure including an upper body portion, a lower body portion, and a contracted body portion between the upper body portion and the lower body portion.
On the front surface and the back surface of the contracted body portion, there are gripping recesses that are recessed inward of the bottle, respectively.
In the central portion of the gripping recess, a panel portion composed of a region defined by linear ribs on all sides is formed.
A plurality of circumferential ribs are recessed in the upper body portion and the lower body portion, respectively.
Boundary peripheral ribs are recessed at each of the boundary portion between the upper body portion and the contracted body portion and the boundary portion between the lower body portion and the contracted body portion.
The boundary peripheral rib is a plastic bottle configured to be shallower and narrower than the circumferential ribs formed on the upper body portion and the lower body portion, respectively. Circumferential ribs are formed on the lower body portion, and the circumferential ribs on the lower body portion are formed on the front surface of the lower body portion, the horizontal portion formed at a low position on the left and right center portions on the back surface, and the side surface thereof. It is configured to have a horizontal portion formed at a high position in the central portion in the front-rear direction and an inclined portion provided so as to connect both horizontal portions.
On the front surface and the back surface of the lower body portion, an upper horizontal rib is recessed between the circumferential rib on the uppermost side and the contracted body portion.
The plastic bottle according to claim 1. Circumferential ribs are formed on the lower body portion, and the circumferential ribs on the lower body portion are formed on the front surface of the lower body portion, the horizontal portion formed at a low position on the left and right center portions on the back surface, and the side surface thereof. It is configured to have a horizontal portion formed at a high position in the central portion in the front-rear direction and an inclined portion provided so as to connect both horizontal portions.
On the side surface of the lower body portion, a lower horizontal rib is recessed between the lowermost circumferential rib and the bottom portion.
The plastic bottle according to claim 1 or 2, wherein the plastic bottle is characterized by the above. Circumferential ribs are formed on the contracted portion by shifting the positions up and down.
The upper side and the lower side of the panel portion are defined by the circumferential ribs.
In the vicinity of the periphery of the gripping recess, each of the circumferential ribs is provided with a vertical rib extending in the vertical direction.
The plastic bottle according to any one of claims 1 to 3, wherein the plastic bottle is characterized by the above.

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