JP2018104025A - Resin container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin container having improved buckling strength.SOLUTION: A resin container X has a mouth portion 10 used as a spouting portion of a content, a shoulder portion 20 continuous to the mouth portion 10, a body portion 30 continuous to the shoulder portion 20, and a body portion 40 which is continuous to the body portion 30 and blocks the lower end of the body portion 30, where the body portion 30 is provided with a plurality of panel portions 31 having a substantially square shape in a state where an upper side 31a and a lower side 31b are displaced, and has ribs 32 having mount shapes provided between each of the panel portions 31.SELECTED DRAWING: Figure 1

Description

  The present invention includes a mouth portion serving as a spout for contents, a shoulder portion provided continuously with the mouth portion, a trunk portion provided continuously with the shoulder portion, and a lower end of the trunk portion provided continuously with the trunk portion. It is related with the resin-made container provided with the bottom part which obstruct | occludes.

  Resin containers made of thermoplastic resin such as polyethylene, polypropylene, polyethylene terephthalate, etc. are lightweight, easy to handle, excellent in storage stability of the contents, and cheap in terms of cost. It is used for various purposes such as food use, food use, and cosmetic use.

  Such a resin container is known to have a configuration in which a vacuum absorption panel is provided in the body portion in order to cope with high temperature filling in which contents such as tea are filled in a heated high temperature state (for example, Patent Document 1). That is, if the mouth is closed with a cap after the contents are filled at high temperature, the contents may be cooled and the decompression may occur in the resin container, resulting in significant deformation of the trunk. By providing the reduced pressure absorption panel, it is possible to prevent the entire body from being largely deformed by absorbing the reduced pressure in the resin container by the deformation of the reduced pressure absorption panel.

Japanese Patent Laid-Open No. 2006-159941

  In the resin container described in Patent Document 1, a plurality of reduced pressure absorption panels are formed in the body portion, and each of the reduced pressure absorption panels is formed in a plate shape recessed inside the body portion. This vacuum absorption panel is disclosed in which the upper and lower shapes are different. With such a shape, for example, when excessive stress is applied to the resin container during conveyance on a conveyor or the like, there is a possibility that a part where the stress is concentrated may occur, and the resin container may buckle from the part. There was a problem that there was.

  Accordingly, an object of the present invention is to provide a resin container having improved buckling strength.

  In order to achieve the above object, the first characteristic configuration of the resin container according to the present invention includes a mouth part serving as a spout for contents, a shoulder part connected to the mouth part, and a shoulder part connected to the shoulder part. A body part, and a bottom part that is connected to the body part and closes a lower end of the body part, and the body part is provided with a plurality of substantially rectangular panel parts in a state where the upper side and the lower side are displaced, There is a mountain-shaped rib between the panels.

  According to this configuration, since the body portion is provided with a plurality of substantially rectangular panel portions in a state where the upper side and the lower side are displaced, the panel portion can be formed into a square shape. Compared to a resin container using a different reduced pressure absorption panel, a site where stress is concentrated is less likely to occur. Therefore, even if excessive stress acts on the resin container during conveyance by a conveyor or the like, the resin container is difficult to buckle. Therefore, the resin container of the present invention is a resin container having improved buckling strength.

  In addition, since the trunk portion can be configured to exhibit a twisted shape in which the lower side is twisted so as to rotate relative to the upper side of the panel portion about the central axis of the resin vessel, Even if decompression occurs, large deformation of the resin container can be prevented.

  The second characteristic configuration of the resin container according to the present invention is that the panel portion has a parallelogram shape and the width of each panel portion is configured to be equal.

According to this configuration, since the wide portion and the narrow portion are not formed in the panel portion, the conventional upper and lower shapes are formed in the resin container using the reduced pressure absorption panel. Since the wide part of the vacuum absorbing panel can be narrowed, buckling of the panel part can be suppressed.
Furthermore, a plurality of chevron-shaped ribs formed between the panel portions can be arranged at equal intervals, so that a site where stress is concentrated in each chevron-shaped rib is less likely to occur. Therefore, as described above, even when excessive stress is applied to the resin container, the resin container is less likely to buckle.

  A third characteristic configuration of the resin container according to the present invention is that the angle of the mountain-shaped rib is 90 to 160 °.

  According to this configuration, since the strength of the mountain-shaped rib can be set appropriately, the resin container is less likely to buckle even when excessive stress acts on the resin container as described above. .

  A fourth characteristic configuration of the resin container according to the present invention is that the slopes of the mountain-shaped ribs have a uniform width from the upper side to the lower side of the resin container.

  According to this structure, it becomes difficult to produce the site | part where stress concentrates in a mountain-shaped rib. Therefore, as described above, even when excessive stress is applied to the resin container, the resin container is less likely to buckle.

  A fifth characteristic configuration of the resin container according to the present invention is an annular concave rib that is recessed toward at least one of the upper and lower sides of the panel portion toward the inside of the resin container and extends in a circumferential direction of the resin container. It is in the point with.

  According to this configuration, since the strength of the periphery of the trunk portion provided with the panel portion can be improved, the resin container can be seated even when excessive stress acts on the resin container as described above. It becomes difficult to bend.

It is a perspective schematic diagram of the resin container of the present invention. It is a side schematic diagram of the resin container of the present invention. It is a side schematic diagram of the resin container of the present invention. It is a section schematic diagram of the resin container of the present invention. It is the principal part schematic of the connection part of the shoulder part which is above a trunk | drum, and a trunk | drum. It is VI-VI sectional drawing in FIG. 2 of the intermediate part of a trunk | drum. It is the principal part schematic of the connection part of the trunk | drum which is the trunk | drum below, and a bottom part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 7, the resin container X of the present invention includes a mouth portion 10 serving as a spout for contents, a shoulder portion 20 connected to the mouth portion 10, and a shoulder portion 20. A body portion 30 to be provided, and a bottom portion 40 that is connected to the body portion 30 and closes the lower end of the body portion 30.

  In the resin container X of the present invention, the body portion 30 is provided with a plurality of substantially rectangular panel portions 31 with the upper side 31a and the lower side 31b displaced, and a mountain-shaped rib 32 is provided between the panel portions 31. It is.

  The resin container X can be manufactured by a known molding method such as a biaxial stretch blow molding method using a thermoplastic resin such as polyethylene, polypropylene, or polyethylene terephthalate as a main material.

  The content (liquid) filled in the resin container X is not particularly limited, and examples thereof include drinking water, tea, fruit juice, coffee, cocoa, soft drinks, alcoholic beverages, milk beverages, and soups. Examples include beverages and liquid seasonings such as sauces and soy sauce. Also, the internal volume of the resin container X is not particularly limited. Depending on the type of contents to be filled, the internal volume of the resin container X is from a relatively small capacity of several hundred milliliters to a relatively large capacity of several liters. It can be applied arbitrarily up to the ones.

  When the resin container X is applied as a beverage bottle, the internal volume is preferably 320 to 550 mL, but is not limited to this range. In the present embodiment, a case where the internal volume is 455 mL will be described. In this case, the height from the mouth portion 10 to the bottom portion 40 is about 211 mm, and the maximum diameter of the body portion 30 is about 64 mm, but is not limited thereto.

  The mouth portion 10 is a portion constituted by a cylinder whose upper end is open, and functions as a spout for the contents. A male screw portion is formed on the outer peripheral surface of the mouth portion 10, and a cap (not shown) may be detachably screwed and fixed so that it can be repeatedly sealed and opened.

  The shoulder portion 20 is a portion that continuously expands from its upper end downward and is configured in a substantially conical shape. Although the longitudinal cross-sectional shape of the shoulder part 20 is good to make it the gentle circular arc which protrudes on the container outer side, it is not limited to such an aspect.

  The trunk portion 30 is a substantially cylindrical portion connected to the lower end of the shoulder portion 20. The shoulder portion 20 above the trunk portion 30, the connecting portion 30 </ b> A of the trunk portion 30, and the middle portion that is the middle of the trunk portion 30. 30B, the trunk | drum 30 below the trunk | drum 30, and the connection part 30C of the bottom part 40 are provided.

  In the present embodiment, the shoulder portion 20 above the trunk portion 30 and the connecting portion 30A of the trunk portion 30 are recessed toward the inside of the resin container X, and the two annular rings extending in the circumferential direction of the resin container X. The case where the groove parts 51 and 52 of a book are provided is demonstrated. The number of the groove portions is not limited to two, but may be one or three or more. Between the groove parts 51 and 52, an annular convex rib 61 is provided which protrudes toward the outside of the resin container X and extends in the circumferential direction of the resin container X.

  By providing the groove portions 51 and 52 in the connection portion 30A as in this configuration, the buckling strength of the connection portion 30A that is above the trunk portion 30 (above the resin container X) can be improved.

  Further, the connecting portion 30A includes an annular concave rib 53 that is recessed toward the inside of the resin container X and extends in the circumferential direction of the resin container X. The concave rib 53 is provided with a plurality of convex ribs 54 protruding in a direction intersecting with the extending direction of the concave rib 53, and the convex rib 54 is configured to recede from the surface 1 of the resin container X. (FIGS. 3-5). Between the groove 52 and the concave rib 53, there is provided an annular convex rib 62 that protrudes toward the outside of the resin container X and extends in the circumferential direction of the resin container X.

  The concave rib 53 of this embodiment is recessed about 2 to 5 mm toward the inside of the resin container X, and is configured such that the width of the rib increases toward the outside of the resin container X (see FIG. 5). In the present embodiment, a case where the opening angle of the concave rib 53 is 90 ° will be described, but the present invention is not limited to this. Moreover, although the convex rib 54 of this embodiment is exhibiting the square shape provided with the rib outer surface 54a which is the surface which faced the outer side of the resin-made containers X, it is not restricted to such an aspect, Such a rib It is good also as a rounded aspect without providing the outer surface 54a. The width of the portion where the convex rib 54 is in contact with the concave rib 53 is preferably about 9 mm, but is not limited thereto.

When the annular concave rib 53 extending in the circumferential direction of the resin container X is provided as in this configuration, the buckling strength of the connection portion 30A that is above the trunk portion 30 (above the resin container X) is improved. Can be made.
Further, when a plurality of convex ribs 54 are provided on the concave rib 53 so as to protrude in the direction intersecting with the extending direction of the concave rib 53, the flexibility of the resin container X around the portion where the convex rib 54 is provided is provided. Tee (flexibility) is improved. That is, if the resin container X is laminated while being conveyed by a conveyor or the like, an excessive stress acts on the resin container X (a portion where a plurality of convex ribs 54 are provided), and the stress is increased. Even when a dent or distortion occurs in the affected part, the property of returning to the original shape is improved, so that the generated dent or distortion is easily eliminated.
Further, if the convex ribs 54 are configured so as to recede from the surface 1 of the resin container X, the convex ribs 54 are provided even when the resin containers X come into contact with each other during conveyance by a conveyor or the like. Does not come into contact with the convex ribs 54 of the other resin containers X, so that damage to the convex ribs 54 and damage to the other resin containers X can be prevented.

  In the present embodiment, the case where the concave rib 53 is disposed below the groove 52 will be described. However, the present invention is not limited to this.

  The number of the convex ribs 54 is not particularly limited, but preferably 8 to 12 ribs are provided at equal intervals. In the present embodiment, a case where ten convex ribs 54 are provided will be described.

  In this configuration, the convex ribs 54 can be disposed over the peripheral surface of the concave ribs 53 at an appropriate interval that can maintain the flexibility of the resin container X.

  When the number of the convex ribs 54 is less than 8, it becomes difficult to maintain the flexibility of the resin container X, and when the number of the convex ribs 54 is 13 or more, the resin container X Since the structure becomes complicated, it is not preferable.

  In this case, the occupation ratio of the convex ribs 54 in the concave ribs 53 may be 30 to 60%. For example, when ten convex ribs 54 are provided, the occupation ratio is 36%.

  Also in this configuration, the convex ribs 54 can be arranged over the peripheral surface of the concave ribs 53 at an appropriate ratio that can maintain the flexibility of the resin container X.

  The bottom width W of the concave rib 53 is preferably 15 mm or less, preferably 10 mm or less, more preferably 5 mm or less. The width W of the bottom is a width in the same direction as the axial center (center axis A) direction of the resin container X. In the present embodiment, a case where the bottom width W is 3.5 mm will be described.

  In this configuration, the width W of the bottom of the appropriate concave rib 53 that can maintain the flexibility of the resin container X can be set.

  If the width W of the bottom of the concave rib 53 exceeds 15 mm, it becomes difficult to maintain the flexibility of the resin container X.

  The convex rib 54 preferably has a dimension of retreating from the surface of the resin container X of 0.3 to 3 mm.

  In this structure, it can be set as the receding dimension of the appropriate convex rib 54 which can maintain the flexibility of the resin container X.

  In addition, in the convex rib 54, when the dimension retracted from the surface of the resin container X is less than 0.3 mm, there is a possibility that the convex rib of the adjacent resin container X and the convex rib 54 come into contact. There is a possibility that both of them may be damaged, which is not preferable. Further, if the dimension retracting from the surface of the resin container X exceeds 3 mm, it becomes difficult to maintain the flexibility of the resin container X.

  Thus, in the resin container X of the present embodiment, the concave rib 53 and the convex rib 54 are either the upper half of the resin container X (the shoulder 20 and the trunk 30 above the trunk 30). The connecting part 30A) is provided.

  When the resin container X is transported by a conveyor or the like, the resin container X may come into contact with each other because the resin container X swings. In this case, if the concave rib 53 and the convex rib 54 are provided in any one of the upper half of the resin container X as in this configuration, excessive stress acts on the resin container X, and the stress Even when a dent or distortion occurs in a portion where the sag acts, the generated dent or distortion is easily eliminated.

  A plurality of substantially rectangular panel portions 31 in which the upper side 31a and the lower side 31b are displaced are provided in the intermediate portion 30B, which is the middle of the body portion 30. In this embodiment, a case where six panel portions 31 are provided will be described, but the present invention is not limited to this. By connecting a plurality of the substantially rectangular panel portions 31 in a state where the upper side 31a and the lower side 31b are displaced in this manner in a cylindrical shape, the intermediate portion 30B of the trunk portion 30 is substantially cylindrical (the cross section is substantially hexagonal). (FIG. 6). At this time, mountain-shaped ribs 32 are formed between the panel portions 31.

  The intermediate part 30B of the substantially cylindrical body part 30 has a twist shape in which the lower side 31b is twisted so as to rotate relative to the upper side 31a of the panel part 31 about the central axis A of the resin container X. Presents. Therefore, the trunk portion 30 is reduced in diameter as it goes downward from the upper side 31 a of the panel portion 31, and is in a state of being most reduced in the middle of the panel portion 31, and goes from the middle of the panel portion 31 to the lower side 31 b of the panel portion 31. It becomes the aspect which expands according to. The angle a of the twist shape of the intermediate portion 30B of the body portion 30 at the normal time is preferably about 75 ° in a side view, but is not limited to this.

  The intermediate part 30B of the trunk part 30 can act as a reduced pressure absorption part. That is, if the mouth portion 10 is closed with a cap after the contents are filled with high temperature, the resin container X may be depressurized as the contents are cooled, and the resin container X may be greatly deformed. However, by providing a plurality of panel portions 31 in the intermediate portion 30B of the trunk portion 30, the reduced pressure in the resin container X is absorbed by the deformation of the plurality of panel portions 31, and the entire resin container X becomes large. It is possible to prevent deformation.

  Specifically, the intermediate portion 30B (decompression absorbing portion) of the trunk portion 30 is formed such that the plurality of panel portions 31 are deformed inward in the radial direction and the angled ribs 32 are further inclined at a larger angle. By twisting and deforming, the lower side 31b can be twisted so as to rotate relative to the upper side 31a of the panel portion 31 about the central axis A of the resin container X. When the intermediate portion 30B (decompression absorbing portion) of the trunk portion 30 is twisted, the internal volume of the resin container X is reduced. Therefore, when decompression occurs in the resin container X due to high-temperature filling, the intermediate portion 30B (decompression absorbing portion) of the trunk portion 30 is twisted to absorb the decompression.

Since the plurality of substantially rectangular panel portions 31 in a state where the upper side 31a and the lower side 31b are displaced are provided in the body portion 30 as in the present configuration, the panel portion 31 can be formed into a square shape. Compared with a resin container using a reduced pressure absorption panel having a different shape on the lower side, a site where stress is concentrated is less likely to occur. Therefore, even if excessive stress is applied to the resin container X during conveyance by a conveyor or the like, the resin container X is difficult to buckle. Therefore, the resin container X is a resin container having improved buckling strength. Even if the amount of the thermoplastic resin per container is reduced (for example, reduced from 20 g to 18 g) in order to reduce the weight of the resin container X, the buckling strength is improved with this configuration. Due to the structure, it becomes difficult to buckle.
Moreover, since the trunk | drum 30 can be comprised so that the lower side 31b may be twisted so that it may be twisted so that it may rotate relatively centering on the central axis A of the resin container X with respect to the upper side 31a of the panel part 31. Even if the decompression occurs in the resin container X, the resin container X can be prevented from being greatly deformed.

  In this structure, the panel part 31 is exhibiting a parallelogram, and the width of each panel part 31 is comprised equally.

Thereby, in the panel part 31, since a wide part and a narrow part are not formed, the reduced pressure absorption currently formed in the resin-made containers using the reduced pressure absorption panel from which the upper and lower shapes differed conventionally. Since the wide portion of the panel can be narrowed, buckling (deformation that occurs in a direction perpendicular to the load) of the panel portion 31 can be suppressed.
Furthermore, since the plurality of mountain-shaped ribs 32 formed between the panel portions 31 can be arranged at equal intervals, a portion where stress is concentrated in each mountain-shaped rib 32 is less likely to occur. Therefore, as described above, even when an excessive stress is applied to the resin container, the resin container X is hardly buckled.

  The mountain-shaped ribs 32 formed between the panel portions 31 are configured such that the angle b inside the resin container X is 90 to 160 °. In the present embodiment, the case where the angle b (FIG. 6) is 130 ° will be described.

  With this configuration, the strength of the mountain-shaped rib 32 can be set appropriately, so that the resin container X is less likely to buckle even when excessive stress is applied to the resin container as described above. .

  The slope 32a of the mountain-shaped rib 32 is configured to have a uniform width from the upper side to the lower side of the resin container X. In the present embodiment, a case will be described in which the two inclined surfaces 32a of the mountain-shaped ribs 32 are configured to have the same width. In this case, the cross section of the mountain-shaped rib 32 is an isosceles triangle.

  With this configuration, it is difficult to generate a portion where stress is concentrated in the mountain-shaped rib 32. Therefore, as described above, even when an excessive stress is applied to the resin container, the resin container X is hardly buckled.

  The resin container X may be provided with an annular concave rib 55 that is recessed toward the inside of the resin container X and extends in the circumferential direction of the resin container X, at least on either of the upper and lower sides of the panel portion 31. In this embodiment, the case where the concave rib 55 is provided above the panel part 31 is demonstrated.

  With this configuration, the strength of the peripheral edge of the body portion including the panel portion 31 can be improved, so that the resin container X is seated even when excessive stress acts on the resin container as described above. It becomes difficult to bend.

  As in the present embodiment, a plurality of substantially rectangular panel portions 31 in which the upper side 31a and the lower side 31b are displaced are provided, and a mountain-shaped rib 32 is formed between the panel portions 31. If the manufacturing container X is comprised, buckling strength will improve.

  In the connecting portion 30C of the trunk portion 30 and the bottom portion 40, which are below the trunk portion 30, are recessed toward the inside of the resin container X and annular bottom side concave ribs 56, 57 extending in the circumferential direction of the resin container X. Two are provided. The bottom-side concave ribs 56 and 57 are configured such that the width of the ribs increases toward the outside of the resin container X (FIG. 7). In the present embodiment, the case where the opening angle of the bottom-side concave ribs 56 is 60 ° and the opening angle of the bottom-side concave ribs 57 is 80 ° is described, but the present invention is not limited thereto. Between the bottom side concave ribs 56 and 57, there is provided an annular convex rib 63 that is convex toward the outside of the resin container X and extends in the circumferential direction of the resin container X.

  As in this configuration, by providing two bottom-side concave ribs 56 and 57 in the connection portion 30C, the buckling strength of the connection portion 30C that is below the trunk portion 30 (below the resin container X) is improved. Can do. For this reason, if the resin container X is laminated while being conveyed by a conveyor or the like, the excessive stress is applied below the resin container (portions where the bottom ribs 56 and 57 are provided). However, it is difficult for the lower part of the resin container X to buckle.

  The bottom-side concave ribs 56 and 57 have an optimum rib depth of about 2.8 mm. In this case, the side surface compression strength is improved. The depth of the rib is not limited to this value.

  A bottom portion 40 that is connected to the body portion 30 and closes the lower end of the body portion 30 includes a recessed portion 41 that is recessed inside the resin container X, and a bottom surface that is in contact with the flat surface and the like when the resin container X is laid flat. 42. The bottom surface 42 has a ring shape in plan view and is disposed on the outer periphery of the recessed portion 41.

  The present invention includes a mouth portion serving as a spout for contents, a shoulder portion provided continuously with the mouth portion, a trunk portion provided continuously with the shoulder portion, and a lower end of the trunk portion provided continuously with the trunk portion. It can be used for a resin container provided with a bottom portion for closing.

X resin container 10 mouth portion 20 shoulder portion 30 trunk portion 31 panel portion 31a upper side 31b lower side 32 mountain-shaped rib 40 bottom portion 55 concave rib

Claims (5)

A mouth part serving as a spout for contents, a shoulder part connected to the mouth part, a body part connected to the shoulder part, and a bottom part connected to the body part to close the lower end of the body part And comprising
The body portion is a resin container in which a plurality of substantially rectangular panel portions in which the upper side and the lower side are displaced are provided, and a mountain-shaped rib is provided between the panel portions.   The resin container according to claim 1, wherein the panel portion has a parallelogram shape, and the widths of the panel portions are configured to be equal.   The resin container according to claim 1 or 2, wherein the mountain-shaped rib has an angle of 90 to 160 °.   The resin container according to any one of claims 1 to 3, wherein the slope of the mountain-shaped rib has a uniform width from above to below the resin container.   In any one of Claims 1-4 provided with the cyclic | annular concave rib extended in the circumferential direction of the said resin container in the at least any one of the upper and lower sides of the said panel part toward the inner side of the said resin container. The resin container described.

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