TW201829255A - Resin container - Google Patents

Abstract

The present invention is a resin-made container X provided with: a mouth part 10 as a pour spout for contents; a shoulder part 20 provided continuously with the mouth part 10; a body part 30 provided continuously with the shoulder part 20; and a bottom part 40 for blocking a bottom end of the body part 30, the bottom part 40 being provided continuously with the body part 30; the body part 30 being provided with a plurality of substantially quadrilateral panel parts 31 in a state in which a top side 31a and a bottom side 31b thereof are displaced, and ridge-shaped ribs 32 being provided between the panel parts 31, and the present invention is configured so that an annular recessed rib 53 recessed toward the inside of the resin-made container X and extending in a circumferential direction of the resin-made container X is provided, a plurality of protruding ribs 54 protruding in a direction intersecting with the direction in which the recessed rib 53 extends are provided to the recessed rib 53, and the protruding ribs 54 recede from the surface of the resin-made container X.

Description

Resin container

[0001] The present invention relates to a resin container having a mouth portion that is an outlet for contents, a shoulder portion connected to the mouth portion, and a trunk portion connected to the shoulder portion. And a bottom portion that is connected to the trunk portion and closes the lower end of the trunk portion.

[0002] A resin container made of a thermoplastic resin such as polyethylene, polypropylene, or polyethylene terephthalate as a main material is light-weight and easy to use, and has excellent storage stability of the contents, and is more cost-effective. It is inexpensive, so it is used in various applications such as beverages, foods, and cosmetics. [0003] Such a resin container is known to be filled at a high temperature in order to fill the contents of tea and the like at a high temperature, so a structure in which a decompression absorption panel is provided on the trunk (for example, Patent Documents) 1). In other words, when the mouth is closed with a lid after filling the contents at a high temperature, as the contents are cooled, a pressure reduction occurs in the resin container, and there is a concern that the trunk is greatly deformed. When installed in the trunk, the reduced pressure in the resin container can be absorbed by deformation of the reduced-pressure absorption panel to prevent the entire trunk from being greatly deformed. [0004] In addition, the resin container described in Patent Document 2 includes a neck portion, a cylindrical lower trunk portion connected to the neck portion via a frustum to a rotating upper body portion, and a lower end connected to a lower end of the lower trunk portion. bottom. Between the lower torso portion and the upper torso portion, recessed ribs are formed that perform a cushioning action during heat and cooling. [Prior Art Document] [Patent Document] [0005] Patent Document 1 Japanese Patent Laid-Open No. 2016-159941 公报 Patent Document 2 Japanese Patent Laid-Open No. 7-309320

[Problems to be Solved by the Invention] [0006] The resin container described in Patent Document 1 has a plurality of reduced-pressure absorption panels formed in a trunk portion, and each of the reduced-pressure absorption panels has a plate shape that is recessed toward the inside of the trunk portion. This reduced pressure absorption panel reveals that the shapes of the upper side and the lower side are different. In such a shape, when an excessive stress is applied to the resin container during conveyance such as a conveyor, there is a concern that the stress concentration portion is generated, and there is also a problem that the resin container is buckled from the portion. [0007] In addition, the resin container described in Patent Document 2 has a smooth shape connected to the upper trunk portion provided on the neck. With such a shape, it is easy to connect the upper torso provided on the neck when an excessive stress is applied to the resin container when the resin container is stacked while being transported, for example, on a conveyor or the like. There is a suspicion that a depression or a skew occurs in the department, and there is a suspicion that the depression remains directly. [0008] Therefore, an object of the present invention is to provide a resin container having improved buckling strength. In addition, an object of the present invention is to provide a resin container capable of improving flexibility and suppressing depressions and skews even if an excessive stress is applied to the resin container. [Technical Means for Solving the Problem] [0009] A first characteristic feature of the resin container according to the present invention for achieving the above-mentioned object is that it includes a mouth portion that is an outlet for contents and a shoulder portion that is a connection The trunk is connected to the shoulder; and the bottom is connected to the trunk and closes the lower end of the trunk, and the trunk is provided with a plurality of states to displace the upper and lower sides A substantially quadrangular panel portion is provided with a mountain-shaped rib portion between the panel portions. [0010] According to this configuration, a plurality of substantially quadrangular panel portions in a state where the upper side and the lower side are displaced are provided in the trunk portion, and the panel portion can be formed into a checkered shape, so the upper side and the lower side are used compared to the conventional use In the case of a resin container of a reduced-pressure absorption panel having a different shape, it is less likely to cause stress concentration. Therefore, even if an excessive stress is applied to the resin container during conveyance by a conveyor or the like, the resin container is less likely to buckle. Therefore, the resin container of the present invention is a resin container having improved buckling strength. [0011] In addition, since the lower part of the trunk part can be configured to have a twisted shape that is twisted while rotating relative to the central axis of the resin container as the center relative to the upper side of the panel part, even if it is generated in the resin container, Decompression can prevent large deformation of the resin container. [0012] A second characteristic configuration of the resin container according to the present invention is that the panel portions have a parallelogram shape, and the widths of the respective panel portions are equal. [0013] According to this configuration, since a wide portion and a narrow portion are not formed in the panel portion, and it is possible to reduce the pressure of a resin container formed in a conventional pressure-reduction absorbent panel having different shapes on the upper and lower sides. Since the width of the absorption panel is narrowed, the curvature of the panel portion can be suppressed. In addition, since a plurality of mountain-shaped ribs formed between the panel portions can be arranged at equal intervals, it is difficult to generate stress concentration in the ribs of each mountain-shaped portion. Therefore, even in the case where an excessive stress is applied to the resin container as described above, the resin container is less likely to buckle. [0014] A third characteristic configuration of the resin container according to the present invention is that the angle of the mountain-shaped rib is formed at 90 to 160 °. [0015] According to this configuration, since the strength of the mountain-shaped ribs can be appropriately set, even if an excessive stress is applied to the resin container as described above, the resin container is not easily buckled. [0016] A fourth characteristic configuration of the resin container according to the present invention is that the slope of the mountain-shaped rib has a uniform width from above to below the resin container. [0017] According to this configuration, a portion where a stress concentration is unlikely to occur in a mountain-shaped rib. Therefore, even in the case where an excessive stress is applied to the resin container as described above, the resin container is less likely to buckle. [0018] A fifth characteristic configuration of the resin container according to the present invention is that at least one of the upper and lower sides of the panel portion is provided with a ring-shaped concave rib, and the concave rib is directed to the resin container. The inside is concave and extends in the circumferential direction of the resin container. [0019] According to this configuration, since the strength of the peripheral edge of the trunk portion including the panel portion can be improved, even if an excessive stress is applied to the resin container as described above, the resin container is less likely to buckle. [0020] A resin container according to the present invention includes: a mouth portion that is an outlet for contents; a shoulder portion that is connected to the mouth portion; a trunk portion that is connected to the shoulder portion; and a bottom portion that is The sixth characteristic feature of the trunk portion is that it is connected to the trunk portion and closes the lower end of the trunk portion, and has a ring-shaped recess that is recessed into the inside of the resin container and extends in the circumferential direction of the resin container. A plurality of convex ribs are provided on the concave ribs in a direction that intersects with the direction in which the concave ribs extend, and the convex ribs are retracted from the surface of the resin container. . [0021] According to this configuration, if the annular concave rib portion extending in the circumferential direction of the resin container is provided, the buckling strength of the resin container can be improved. In addition, when a plurality of convex ribs are provided on the concave ribs so as to protrude in a direction crossing the direction in which the concave ribs extend, the resin container of the periphery of the portion where the convex ribs are provided is provided. Improved flexibility (softness). In other words, if the resin container is laminated while being transported by a conveyor or the like, and the resin container is stacked horizontally, an excessive stress acts on the resin container (a portion provided with a plurality of convex ribs), even if it is Depression and distortion occur in the part where the stress acts, and the nature of returning to the original shape is still improved, so the depression and distortion that occur are easily released. Furthermore, when the convex ribs are configured to retreat from the surface of the resin container, even if the resin containers are in contact with each other when being transported by a conveyor or the like, the convex ribs will not contact other resin containers. The convex ribs are in contact with each other, so it is possible to prevent damage to the convex ribs and other resin containers from being damaged in advance. Generally, although the resin container is lightweight, it is easy to dent and skew due to the stress of the resin container. However, by adopting this configuration, the dent can be suppressed even when the resin container is lightweight. And skew occurs. [0022] A seventh characteristic configuration of the resin container according to the present invention is that it includes 8 to 12 of the aforementioned convex ribs. [0023] According to this configuration, the convex ribs can be provided on the peripheral surface of the concave ribs at appropriate intervals while maintaining the flexibility of the resin container. [0024] An eighth characteristic configuration of the resin container according to the present invention is that the occupation ratio of the convex rib portion to the concave rib portion is 30 to 60%. [0025] According to this configuration, the convex rib portion can be provided on the peripheral surface of the concave rib portion at an appropriate ratio capable of maintaining the flexibility of the resin container. [0026] A ninth characteristic configuration of the resin container according to the present invention is that the width of the bottom of the concave rib portion is 15 mm or less. [0027] According to this configuration, it is possible to form the width of the bottom of the appropriate concave rib portion that can maintain the flexibility of the resin container. [0028] A tenth characteristic configuration of the resin container according to the present invention is that the size of the convex ribs retracting from the surface of the resin container is 0.3 to 3 mm. [0029] According to this configuration, it is possible to form a retracted size of an appropriate convex rib that can maintain the flexibility of the resin container. [0030] An eleventh characteristic configuration of the resin container according to the present invention is that any one of the upper half of the resin container includes the concave rib portion and the convex rib portion. [0031] When the resin container is transported by a conveyor or the like, the resin container may be shaken or the like, and the upper portions of the resin container may come into contact with each other. In this case, if a concave rib and a convex rib are provided in any one of the upper half portions of the resin container as in this configuration, even if excessive stress acts on the upper portion of the resin container, the stress occurs in the portion where the stress acts. In the case of depressions and skews, the occurrences of depressions and skews can still be easily lifted. [0032] A twelfth characteristic configuration of the resin container according to the present invention is that the connecting portion of the trunk portion and the bottom portion is provided with two annular bottom surface side concave ribs, and the bottom surface side concave ribs It is recessed into the inside of the said resin container, and it extends in the circumferential direction of the said resin container. [0033] According to this configuration, by having two bottom side side concave ribs, it is possible to improve the buckling strength of the lower part of the trunk (under the resin container). Therefore, even when the resin container is laminated while being conveyed by a conveyor or the like, an excessive stress acts on the lower portion of the resin container (the portion provided with the bottom-side concave ribs). The bottom of the resin container is still not easy to buckle.

[0035] 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 according to the present invention includes a mouth portion 10 that is an outlet for contents, a shoulder portion 20 that is connected to the mouth portion 10, and a trunk portion. 30 is connected to the shoulder portion 20; and bottom 40 is connected to the trunk portion 30 and closes the lower end of the trunk portion 30. [0036] The resin container X of the present invention is provided with a plurality of substantially rectangular panel portions 31 in a state where the upper side 31a and the lower side 31b are displaced on the trunk portion 30, and a mountain-shaped rib portion 32 is provided between each panel portion 31. [0037] The resin container X can be produced by a known molding method such as a biaxial stretch blow molding method, using a thermoplastic resin such as polyethylene, polypropylene, and polyethylene terephthalate as a main material. [0038] The content (liquid) filled in the resin container X is not particularly limited, and examples thereof include beverage water, tea, fruit juice, coffee, cocoa, refreshing water, alcoholic beverages, milk beverages, and soups. And other beverages; and liquid seasonings such as sauces and soy sauces. In addition, the content of the resin container X is not particularly limited, and can be arbitrarily applied to a relatively small-capacity unit of several hundred milliliters to a relatively large-capacity unit of several liters according to the type of contents to be filled and the like. [0039] When the resin container X is applied as a beverage bottle, the content is preferably 320 to 550 mL, but it is not limited to this range. In the present embodiment, a case where the content amount is set to 455 mL will be described. In this case, although the height from the mouth part 10 to the bottom part 40 is about 211 mm, and the maximum diameter of the trunk part 30 is about 64 mm, it is not limited to these. [0040] The mouth portion 10 is a portion formed by a cylinder opened at the upper end, and functions as an outlet for the contents. A male threaded portion is formed on the outer peripheral surface of the mouth portion 10, as long as a cover (not shown) can be detachably screwed and fixed, and the cover can be tightly closed and opened. [0041] The shoulder portion 20 is a portion that is continuously enlarged in diameter from its upper end and has a substantially conical shape. Although the longitudinal cross-sectional shape of the shoulder portion 20 is preferably formed as a circular arc with a small degree of curvature protruding toward the outside of the container, it is not limited to such an aspect. [0042] The torso portion 30 is a generally cylindrical portion connected to the lower end of the shoulder portion 20, and includes a shoulder portion 20 above the torso portion 30, a connection portion 30A of the torso portion 30, and an intermediate portion in the middle of the torso portion 30. 30B. The connecting portion 30C of the trunk portion 30 and the bottom portion 40 below the trunk portion 30. [0043] In the present embodiment, the shoulder portion 20 above the torso portion 30 and the connecting portion 30A of the torso portion 30 are provided with a recessed inside of the resin container X and extending in the circumferential direction of the resin container X. The case of two annular groove portions 51 and 52 will be described. The number of the grooves is not limited to two, and one, or three or more may be formed. Between the groove portions 51 and 52, there is provided a ring-shaped convex rib portion 61 that protrudes outside the resin container X and extends in the circumferential direction of the resin container X. [0044] As in this configuration, the connection portion 30A is provided with two groove portions 51 and 52, so that the buckling strength of the connection portion 30A above the trunk portion 30 (above the resin container X) can be improved. [0045] The connection portion 30A is provided with a ring-shaped concave rib 53 that is recessed into 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 crossing the direction in which the concave rib 53 extends, and the convex ribs 54 are retracted from the surface 1 of the resin container X. (Figures 3 to 5). Between the groove portion 52 and the concave rib portion 53, there is provided an annular convex rib portion 62 that protrudes to the outside of the resin container X and extends in the circumferential direction of the resin container X. [0046] The concave rib portion 53 of the present embodiment is recessed to the inside of the resin container X by about 2 to 5 mm, and the width of the rib portion becomes wider toward the outside of the resin container X (FIG. 5). In the present embodiment, the case where the opening angle of the concave rib 53 is 90 ° is described, but it is not limited to this. In addition, although the convex rib portion 54 of the present embodiment has an angular shape having a rib outer surface 54a having a surface facing the outer side of the resin container X, it is not limited to such a configuration, and may not include such a configuration. The outer side surface 54a of the rib has a round shape. The width of the portion where the convex rib portion 54 contacts the concave rib portion 53 may be about 9 mm, but it is not limited to this. [0047] If the annular concave rib portion 53 extending in the circumferential direction of the resin container X is provided as in this configuration, the connection portion 30A of the connection portion 30A above the trunk portion 30 (above the resin container X) can be made. Increased buckling intensity. In addition, when a plurality of convex ribs 54 are provided on the concave ribs 53 so as to protrude in a direction crossing the direction in which the concave ribs 53 extend, the periphery of the portion where the convex ribs 54 are provided is provided. The flexibility (flexibility) of the resin container X is improved. In other words, if the resin container X is laminated while being transported 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). Even if the depression and skew occur in the part where the stress is applied, the nature of returning to the original shape is still improved, so the depression and skew that occur can be easily removed. Further, when the convex ribs 54 are configured to retreat from the surface 1 of the resin container X, even if the medium resin containers X are in contact with each other if they are transported by a conveyor or the like, the convex ribs 54 do not contact the resin ribs 54. Since the convex ribs 54 of the other resin containers X are in contact with each other, it is possible to prevent the convex ribs 54 from being damaged and the other resin containers X from being damaged. [0048] In this embodiment, a case where the installation position of the concave rib 53 is below the groove portion 52 will be described, but it is not limited to this. [0049] Although the number of the convex ribs 54 is not particularly limited, it is preferable that 8 to 12 ribs are provided at regular intervals. In this embodiment, a case where ten convex ribs 54 are provided will be described. [0050] In this configuration, the convex ribs 54 can be provided on the peripheral surface of the concave ribs 53 at appropriate intervals while maintaining the flexibility of the resin container X. [0051] In addition, when the number of the convex ribs 54 is less than 8, it is difficult to maintain the flexibility of the resin container X. When the number of the convex ribs 54 is 13 or more, The structure is complicated, so it is not appropriate. [0052] In this case, the occupation ratio of the concave rib portion 53 of the convex rib portion 54 may be 30 to 60%. For example, when ten convex ribs 54 are provided, the occupation rate is 36%. [0053] In this configuration, the convex ribs 54 may be provided on the peripheral surface of the concave ribs 53 at an appropriate ratio while maintaining the flexibility of the resin container X. [0054] In addition, the width W of the bottom of the concave rib 53 may be 15 mm or less, preferably 10 mm or less, and more preferably 5 mm or less. The width W of the bottom is a width in the same direction as the direction of the core (central axis A) of the resin container X. In this embodiment, a case where the bottom width W is set to 3.5 mm will be described. [0055] In this configuration, the width W of the bottom of the appropriate concave rib portion 53 that can maintain the flexibility of the resin container X can be formed. [0056] When the width W of the bottom of the concave rib 53 exceeds 15 mm, it is difficult to maintain the flexibility of the resin container X. [0057] The convex rib 54 preferably has a size of 0.3 to 3 mm that is retracted from the surface of the resin container X. [0058] In this configuration, it is possible to form a retracted size of the convex-shaped rib portion 54 that is suitable for maintaining the flexibility of the resin container X. [0059] In addition, when the size of the convex rib 54 receding from the surface of the resin container X is less than 0.3 mm, the convex portions of the adjacent resin container X and the convex rib 54 may be in contact, and There is a concern that the two will be damaged, so it is not appropriate. In addition, when the size retracted from the surface of the resin container X exceeds 3 mm, it is difficult to maintain the flexibility of the resin container X. [0060] As such, in the resin container X of the present embodiment, any one of the upper half of the resin container X (the shoulder portion 20 above the trunk portion 30 and the connection portion 30A of the trunk portion 30) is provided with The concave rib portion 53 and the convex rib portion 54. [0061] When the resin container X is conveyed by a conveyor or the like, the resin container X may be shaken and the like, and the resin containers X may come into contact with each other. In this case, if a concave rib 53 and a convex rib 54 are provided in any one of the upper half portions of the resin container X as in the present configuration, even if excessive stress acts on the resin container X above the stress, Occurrence of depressions and skews in the acting part, and the occurrences of depressions and skews can still be easily removed. [0062] A plurality of substantially rectangular panel portions 31 are provided in the middle portion 30B in the middle of the trunk portion 30 in a state where the upper side 31a and the lower side 31b are displaced. In the present embodiment, a case where the six panel sections 31 are provided is described, but it is not limited to this. By connecting a plurality of substantially rectangular panel portions 31 in a state where the upper side 31a and the lower side 31b are displaced in this manner, the intermediate portion 30B of the trunk portion 30 can be formed in a substantially cylindrical shape (a substantially hexagonal cross section) (FIG. 6). At this time, a mountain-shaped rib portion 32 is formed between each panel portion 31. [0063] The intermediate portion 30B of the generally cylindrical trunk portion 30 is a twist that presents a state where the lower side 31b of the panel portion 31 is relatively rotated relative to the upper side 31a with the central axis A of the resin container X as the center. Twisted shape. Therefore, the trunk portion 30 is reduced in diameter from the upper side 31a of the panel portion 31, and has the most reduced diameter state in the middle of the panel portion 31, and is moved toward the lower side 31b of the panel portion 31 from the middle of the panel portion 31. Expansion aspect. In addition, although the twisted angle a of the middle portion 30B of the trunk portion 30 may be about 75 ° as viewed from the side, it is not limited to this. [0064] Such a middle portion 30B of the trunk portion 30 can function as a decompression absorbing portion. In other words, when the mouth portion 10 is closed with a lid after filling the contents at a high temperature, there is a concern that the resin container X is greatly deformed by generating a reduced pressure in the resin container X as the contents cool, but the The plurality of panel portions 31 are provided in the middle portion 30B of the trunk portion 30, and the reduced pressure in the resin container X can be absorbed by the deformation of the plurality of panel portions 31 to prevent the resin container X as a whole from being greatly deformed. [0065] Specifically, the middle portion 30B (decompression absorbing portion) of the trunk portion 30 is deformed inward in each radial direction by a plurality of panel portions 31, and the mountain-shaped rib portions 32 are further twisted at an increased inclination angle. The lower side 31b of the panel portion 31 can be rotated relative to the upper side 31a with the central axis A of the resin container X as a center to perform a twisting operation. When the intermediate portion 30B (the decompression absorbing portion) of the trunk portion 30 performs a twisting operation, the content of the resin container X is reduced. Therefore, when a reduced pressure is generated in the resin container X due to the high-temperature filling, the intermediate portion 30B (the reduced-pressure absorption portion) of the trunk portion 30 can perform a twist operation to absorb the reduced pressure. [0066] As in the present configuration, the trunk portion 30 is provided with a plurality of substantially rectangular panel portions 31 in a state where the upper side 31a and the lower side 31b are displaced, and the panel portion 31 can be formed in a checkered shape, which is compared with the conventional structure. In the case of a resin container using a reduced pressure absorption panel having a different shape on the upper side and the lower side, a portion where stress concentration is unlikely to occur. Therefore, even if a moderate excessive stress is applied to the resin container X during transportation by a conveyor or the like, the resin container X is not easily buckled. Therefore, the resin container X is a resin container having improved buckling strength. In order to reduce the weight of the resin container X, even if the amount of the thermoplastic resin per container is reduced (for example, from 20 g to 18 g), as long as this structure is adopted, the buckling strength is improved. Structure, so it is still not easy to buckle. In addition, the trunk portion 30 can be configured to have a twisted shape in which the lower side 31b of the panel portion 31 is relatively twisted relative to the upper side 31a with the central axis A of the resin container X as the center, so that even in the resin container Decompression occurs in X, and large deformation of the resin container X can still be prevented. [0067] In this configuration, the panel portions 31 have a parallelogram shape, and the widths of the panel portions 31 are equal. [0068] As a result, since the panel portion 31 does not have a wide portion and a narrow portion, and it is possible to reduce the size of the conventional resin container formed by using a pressure-reducing absorption panel with a different shape on the upper and lower sides. Since the width of the pressure-absorbing panel is narrowed, the curvature of the panel portion 31 (the deformation in the right-angle direction with the load) can be suppressed. In addition, since a plurality of mountain-shaped ribs 32 formed between the panel portions 31 can be arranged at equal intervals, stress concentration is unlikely to occur in each mountain-shaped rib 32. Therefore, even in the case where an excessive stress is applied to the resin container as described above, the resin container X is not easily buckled. [0069] The mountain-shaped ribs 32 formed between the panel portions 31 are such that the angle b of the inside of the resin container X is 90 to 160 °. A case where this angle b (FIG. 6) is 130 ° in the present embodiment will be described. [0070] With this configuration, since the strength of the mountain-shaped rib portion 32 can be appropriately set, even when an excessive stress is applied to the resin container as described above, the resin container X is not easily buckled. [0071] The slope 32a of the mountain-shaped rib 32 is configured to have a uniform width from above to below the resin container X. In the present embodiment, a description will be given of a case where the widths of the two inclined surfaces 32 a of the mountain-shaped ribs 32 are the same. In this case, the cross section of the mountain-shaped rib 32 is an isosceles triangle. [0072] With this configuration, a portion where the stress concentration is unlikely to occur in the mountain-shaped rib 32. Therefore, even in the case where an excessive stress is applied to the resin container as described above, the resin container X is not easily buckled. [0073] The resin container X may include a ring-shaped concave rib 55 on at least one of the upper and lower sides of the panel portion 31. The concave rib 55 is recessed to the inside of the resin container X and faces the resin. The container X extends in the circumferential direction. In the present embodiment, a case where the concave rib portion 55 is provided above the panel portion 31 will be described. [0074] With this configuration, since the strength of the peripheral edge of the trunk portion including the panel portion 31 can be improved, even when an excessive stress is applied to the resin container as described above, the resin container X is not easily buckled. [0075] In addition, as in the present embodiment, a plurality of substantially quadrangular panel portions 31 are provided in a state where the upper side 31a and the lower side 31b are displaced, and are configured such that a mountain-shaped rib portion 32 is formed between each panel portion 31. The resin container X improves the buckling strength. [0076] The trunk portion 30 and the connecting portion 30C of the bottom portion 40 below the trunk portion 30 are provided with two annular bottom surfaces that are recessed toward the inside of the resin container X and extend in the circumferential direction of the resin container X. Concave ribs 56, 57. The bottom-surface-side concave ribs 56 and 57 are configured such that the width of the ribs becomes wider toward the outside of the resin container X (FIG. 7). In this embodiment, the case where the opening angle of the bottom surface side concave rib portion 56 is 60 ° and the opening angle of the bottom surface side concave rib portion 57 is 80 ° is described, but it is not limited to these. Between the bottom-surface-side concave ribs 56 and 57, there are provided annular convex ribs 63 that protrude to the outside of the resin container X and extend in the circumferential direction of the resin container X. [0077] With this configuration, the connection portion 30C is provided with two bottom-side concave ribs 56, 57 so that the connection portion 30C formed below the trunk portion 30 (below the resin container X) can be buckled. Increased strength. Therefore, even if the resin container X is laminated while being conveyed by a conveyor or the like, an excessive stress acts on the lower portion of the resin container (the bottom surface side concave ribs 56 and 57 are provided). In some cases), the bottom of the resin container X is still not easily buckled. [0078] In addition, the depth of the most suitable ribs for the bottom-surface-side concave ribs 56, 57 is about 2.8 mm. In this case, the side compressive strength is improved. The depth of the rib is not limited to this value. [0079] The bottom portion 40 connected to the trunk portion 30 and closing the lower end of the trunk portion 30 is configured to include a recessed portion 41 recessed into the inside of the resin container X, and a resin container X standing up on a plane or the like. Bottom surface 42 in contact with a plane or the like. The bottom surface 42 is annular in plan view, and is arranged on the outer periphery of the recessed portion 41. [Industrial Applicability] [0080] The present invention can be applied to a resin container having a mouth portion that is an outlet for contents, a shoulder portion that is connected to the mouth portion, and a trunk portion. Is connected to the shoulder; and the bottom is connected to the trunk and closes the lower end of the trunk.

[0081]

X‧‧‧ resin container

10‧‧‧ Oral

20‧‧‧ Shoulder

30‧‧‧ torso

31‧‧‧Panel Department

31a‧‧‧top

31b‧‧‧

32‧‧‧ Mountain-shaped ribs

40‧‧‧ bottom

53‧‧‧Concave ribs

54‧‧‧ convex rib

55‧‧‧Concave ribs

56, 57‧‧‧ recessed ribs on the underside

[0034] FIG. 1 is a schematic perspective view of a resin container of the present invention. Fig. 2 is a schematic side view of a resin container of the present invention. Fig. 3 is a schematic side view of the resin container of the present invention. Fig. 4 is a schematic cross-sectional view of a resin container of the present invention. FIG. 5 is a schematic view of a main part of a shoulder portion above the trunk and a connecting portion of the trunk. FIG. 6 is a cross-sectional view taken along the line VI-VI of the middle part of the trunk. FIG. 7 is a schematic view of a main part of a connection part between a trunk part and a bottom part below the trunk part.

Claims (12)

A resin container includes a mouth portion that is an outlet for contents, a shoulder portion that is connected to the mouth portion, a trunk portion that is connected to the shoulder portion, and a bottom portion that is connected to the trunk portion and The lower end of the trunk portion is closed, and the trunk portion is provided with a plurality of substantially quadrangular panel portions in a state in which the upper and lower sides are displaced, and a mountain-shaped rib is provided between the panel portions. For example, the resin container according to the first scope of the patent application, wherein the aforementioned panel portion is parallelogram-shaped, and the width of each panel portion is equidistantly formed. For example, the resin container according to item 1 or item 2 of the patent application scope, wherein the ribs of the aforementioned mountain shape are formed at 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. For example, the resin container according to any one of claims 1 to 4, wherein: 范围 is provided with a ring-shaped concave rib at at least one of the upper and lower positions of the panel portion, and the concave rib is directed to the foregoing The inside of the resin container is recessed and extends in the circumferential direction of the resin container. A resin container includes a mouth portion that is an outlet for contents, a shoulder portion that is connected to the mouth portion, a trunk portion that is connected to the shoulder portion, and a bottom portion that is connected to the trunk portion and Closing the lower end of the trunk portion, and comprising a ring-shaped concave rib recessed into the inside of the resin container and extending in the circumferential direction of the resin container; A plurality of convex ribs are provided protruding in a direction crossing the direction in which the concave ribs extend, and the convex ribs are retracted from the surface of the resin container. For example, the resin container according to item 6 of the patent application scope, wherein the convex ribs include 8 to 12 pieces. For example, the resin container of the 6th or 7th in the scope of the patent application, wherein: 凸 the occupation ratio of the convex rib portion to the concave rib portion is 30 to 60%. In the resin container according to any one of claims 6 to 8, the width of the bottom of the concave rib portion is 15 mm or less. In the resin container according to any one of claims 6 to 9, the size of the convex ribs retracting from the surface of the resin container is 0.3 to 3 mm. The resin container according to any one of claims 6 to 10 in the scope of patent application, wherein: is provided with the concave rib portion and the convex rib portion in any one of the upper half of the resin container. For example, the resin container according to any one of claims 6 to 11 in the scope of the patent application, wherein the 具备 is provided with two annular bottom-surface-side concave ribs on a connection portion between the trunk and the bottom, and the bottom-surface-side concave shape The ribs are recessed toward the inside of the resin container and extend in the circumferential direction of the resin container.