Bottle container

Abstract

To provide a bottle container capable of suppressing a failure occurring in a bottom part.SOLUTION: Wherein a bottom surface of the bottom portion has a substantially rectangular shape having a first direction orthogonal to the central shaft as a major axis direction and a second direction orthogonal to the central shaft and the first direction as a minor axis direction, and a maximum length in the first direction is larger than a maximum length in the second direction, 25ml, the body portion and the bottom portion have a long diameter portion extending in a long diameter direction, a short diameter portion extending in a short diameter direction, and a corner portion connecting the long diameter portion and the short diameter portion, the bottom portion has a first recessed rib recessed from the bottom surface to the inside of the bottle and linearly extending from the corner portion in a predetermined direction along the bottom surface, and a region sandwiched by two straight lines extending in the predetermined direction and forming a maximum width of the first recessed rib is separated from a center of the bottom surface.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a bottle container. [Background technology]

[0002] In recent years, bottle containers have become thinner in response to environmental concerns. The thinner the bottle, the more easily it is dented. In particular, when a bottle is not cylindrical but has a substantially rectangular cross-sectional shape with a major axis and a minor axis, the minor axis tends to become thinner during blow molding, for example.

[0003] Therefore, the bottle container has a problem in that the bottom of the short diameter portion is easily dented due to tipping, dropping, or pressure on the production line. For example, Patent Document 1 discloses a configuration in which first grooves are formed in legs provided at the four corners of the bottom, radially arranged from the center of the bottom. Patent Document 1 discloses that by forming the first grooves, the legs are deformed so as to bend in the direction of the first grooves, dispersing the load and preventing defects from occurring in the bottom. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-151323 Summary of the Invention [Problem to be solved by the invention]

[0005] However, as mentioned above, if the first groove portion is arranged radially around the center of the bottom, the stress applied from the outside of the bottle container when it is dropped will concentrate at the center of the bottom, causing the problem that malfunctions in the bottom will be more likely to occur starting from the center.

[0006] The present invention has been made in consideration of the above points, and has an object to provide a bottle container that can suppress defects that occur at the bottom. [Means for solving the problem]

[0007] The present invention has the following aspects. The container has a mouth, a shoulder, a body, and a bottom, which are arranged along a central axis, and is made of a synthetic resin material; The ratio of the full pour volume to the weight of the synthetic resin material is 25 ml / g or more; a bottom surface of the bottom portion has a substantially rectangular shape with a first direction perpendicular to the central axis as its major axis direction and a second direction perpendicular to the central axis and the first direction as its minor axis direction, and the maximum length in the first direction is greater than the maximum length in the second direction; The body and the bottom are a major diameter portion extending in the major diameter direction; a minor diameter portion extending in the minor diameter direction; a corner portion connecting the major diameter portion and the minor diameter portion; and The bottom portion has a first concave rib recessed from the bottom surface into the bottle and extending linearly from the corner portion in a predetermined direction along the bottom surface, A bottle container, wherein the area sandwiched between two straight lines extending in the predetermined direction and forming the maximum width of the first concave rib is away from the center of the bottom surface. [Effects of the Invention]

[0008] The present invention makes it possible to provide a bottle container that can suppress defects that occur at the bottom. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram showing an embodiment of the present invention, and is a front view of a bottle container. FIG. [Figure 2] FIG. 2 is a side view of the bottle container. [Figure 3] FIG. [Figure 4] FIG. 4 is a partially enlarged view of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the bottle container of the present invention will be described with reference to FIGS. The following embodiment shows one aspect of the present invention, does not limit the present invention, and can be modified as desired within the scope of the technical concept of the present invention. In addition, in the following drawings, the scale and number of each structure are different from the actual structure to make each configuration easier to understand.

[0011] Fig. 1 is a front view of the bottle container 1. Fig. 2 is a side view of the bottle container 1. Fig. 3 is a bottom view of the bottle container 1.

[0012] 1 and 2, the bottle container 1 is configured such that a mouth portion 11, a shoulder portion 12, a body portion 13, and a bottom portion 14 are arranged coaxially with a central axis J extending in the vertical direction and are connected in this order from top to bottom. The bottle container 1 is filled with, for example, liquid detergent. Hereinafter, when viewed from the top-bottom direction along the central axis J, a direction intersecting the central axis J will be referred to as a radial direction, and a direction going around the central axis J will be referred to as a circumferential direction.

[0013] The bottle container 1 is formed by blow molding a preform formed into a cylindrical shape with a bottom by injection molding, and is integrally formed from a synthetic resin material such as polyethylene terephthalate or polypropylene. A cap (not shown) is attached to the mouth portion 11.

[0014] The full capacity is the capacity when the bottle container 1 is filled with liquid up to the top of the mouth 11 with no cap attached. In the bottle container 1 of this embodiment, the ratio of the full capacity to the weight of the synthetic resin material is 25 ml / g or more. If the ratio of the full capacity to the weight of the synthetic resin material becomes too large, the thickness of the bottle container 1 becomes too thin, making molding difficult, so the ratio is preferably 25 ml / g or more and 50 ml / g or less.

[0015] The bottle container 1 of this embodiment preferably has a capacity of 500 ml or more, which is the capacity that makes it easy to obtain the effects of the present invention. Although it is not particularly necessary to set an upper limit on the full capacity, it is preferable that the upper limit be 2000 ml or less, for example.

[0016] The body 13 extends in the vertical direction. The bottom 14 extends downward from the lower end of the body 13 while reducing in diameter. As shown in Fig. 3, the outermost periphery of the bottom surface 14a of the bottom 14 and the body 13 have a substantially rectangular shape in which the maximum length L in a first direction (left-right direction in Fig. 3) perpendicular to the central axis J is greater than the maximum length W in a second direction (up-down direction in Fig. 3) perpendicular to the central axis J and the first direction (i.e., L>W). In this embodiment, the first direction is the major axis direction, and the second direction is the minor axis direction.

[0017] The bottom surface 14a of the bottom portion 14 is the surface facing downward of the bottom portion 14. The bottom surface 14a has a contact surface 14b and a raised bottom portion 14c. The contact surface 14b is the surface located at the lowest part of the bottom surface 14a. As shown in FIG. 1, the contact surface 14b is the surface that comes into contact with the mounting surface 10 when the bottle container 1 is placed on the mounting surface with the bottom portion 14 facing downward. As shown in FIG. 3, the contact surface 14b is located radially inward of a ridge line 14d indicated by a two-dot chain line that is similarly reduced radially inward from the outermost periphery of the bottom surface 14a.

[0018] The raised bottom portion 14c is recessed upward from the ground surface 14b toward the bottle interior 1A. The raised bottom portion 14c is surrounded by the ground surface 14b. The raised bottom portion 14c is recessed upward from the ground surface 14b via an inclined surface.

[0019] When viewed along the central axis J, the body 13 and the bottom 14 have a major diameter portion 21, a minor diameter portion 22, and corner portions 23. The major diameter portion 21 has an arc shape with its arc center on the side closer to the central axis J and bulging outward in the radial direction. The minor diameter portion 22 has an arc shape with its arc center on the side closer to the central axis J and bulging outward in the radial direction. The corner portions 23 are located at the intersections of the major diameter portion 21 and the minor diameter portion 22 and connect the major diameter portion 21 and the minor diameter portion 22.

[0020] Here, if the height from the ground plane 14b to the upper end of the mouth portion 11 is HM, in order to ensure the stability of the bottle container 1 in the upright state, it is preferable to satisfy the relationship of the maximum length L in the major axis direction < HM < 3 times the maximum length L, and it is more preferable to satisfy the relationship of the maximum length L in the major axis direction < HM < 2 times the maximum length W.

[0021] Also, in order to ensure the stability of the bottle container 1 in the upright state, it is preferable to satisfy the relationship of 1.35 times the maximum length W in the minor axis direction < HM < 7.5 times the maximum length W, and it is more preferable to satisfy the relationship of 1.35 times the maximum length W in the minor axis direction < HM < 5 times the maximum length W.

[0022] As L / W, which is the ratio of the maximum length L to the maximum length W, it is preferably 1.35 or more and 2.50 or less. When the value represented by L / W is less than 1.35, since the difference in the timing when the synthetic resin material touches the mold during blow molding is small, the difference in wall thickness is unlikely to occur, and it is difficult to obtain the effects of the present invention. On the other hand, when the value represented by L / W exceeds 2.50, blow molding becomes difficult in the thin-walled bottle container 1, which is not preferable.

[0023] The bottom portion 14 has a first concave rib 31, a second concave rib 32, and a third concave rib 33. The first concave rib 31 is provided at the corner portion 23. In the bottom portion 14, the first concave rib 31 is recessed upward from the bottom surface 14a toward the inside 1A of the bottle. When viewed along the central axis J, the first concave rib 31 linearly extends in a predetermined direction along the bottom surface 14a from the outermost periphery of the bottom surface 14a toward the bottom raising portion 14c.

[0024] When viewed along the central axis J, the center line of the first concave rib 31 that linearly extends in a predetermined direction is defined as L1, and two straight lines parallel to the center line L1 that form the maximum width of the first concave rib 31 are each defined as L2. The region sandwiched by the two straight lines L2 that form the maximum width of the first concave rib 31 is away from the center of the bottom surface 14a (that is, the central axis J). [[ID=2!]]

[0025] By providing the first concave rib 31 at the corner portion 23, when the bottom portion 14 is concave from the side in the long or short diameter direction, the first concave rib 31 acts as a stopper to prevent the circumferential propagation of the concave, thereby suppressing the concave from the side at the bottom portion 14. Furthermore, if the area sandwiched between the two straight lines L2 includes the center of the bottom surface 14a and the multiple first concave ribs 31 all face the center of the bottom surface 14a, the stress applied from the outside when the bottle container 1 is dropped will be concentrated at the center of the bottom surface 14a, making it more likely to crack starting from the center of the bottom surface 14a. Therefore, by having the area sandwiched between the two straight lines L2 away from the center of the bottom surface 14a, it is possible to alleviate stress concentration on the center of the bottom surface 14a when the bottle container 1 is dropped.

[0026] Furthermore, it is preferable to adjust the angles at which the two straight lines L2 of the first concave rib 31 intersect with the outermost contour of the corner portion 23 so that they are equal to each other. This prevents the magnitude of the stress described above from being extremely different on both sides in the circumferential direction of the opening of the first concave rib 31. This has the effect of mitigating stress concentration when the bottle container 1 is dropped or from the side. Furthermore, since the angles at which the two straight lines L2 intersect with the outermost contour of the corner portion 23 are equal, it is possible to equalize the mold release resistance when releasing the bottle container 1 after blow molding, allowing the bottle container 1 to be released smoothly from the mold.

[0027] For example, in biaxially stretched blow molding, when a preform (synthetic resin material) expands, it first touches (touches down) the mold molding the side closest to the center (long diameter portion). The preform then touches the mold molding the side farthest from the center (short diameter portion). At this time, the synthetic resin material that touches the mold molding the side farthest from the center (short diameter portion) tends to be thinner than the synthetic resin material that touches the mold molding the side closest to the center (long diameter portion). In this embodiment, the bottle container 1 is thin-walled, with a full-fill capacity to weight ratio of the synthetic resin material of 25 ml / g or more. Furthermore, the maximum length L in the long diameter direction is greater than the maximum length W in the short diameter direction. This makes the synthetic resin material in the short diameter portion 22 thinner, making it more susceptible to denting due to external stress when the bottle container 1 is dropped. The first concave rib 31 provides reinforcement against dents in this bottle container 1.

[0028] The intersection point m1 is defined as the point of intersection between the minor axis extending in the minor diameter direction and passing through the central axis J and the center line L1 of the first concave rib 31. From the viewpoint of suppressing the occurrence of stress concentration points, the intersection point m1 is located between the central point (central axis J) and the intersection point m2 of the outermost diameter and the minor axis of the bottom portion 14, and further preferably located outside 1 / 3 of the distance between the intersection point m2 and the central point (central axis J).

[0029] 1, the first concave rib 31 is formed to extend upward from the bottom 14 across the body 13. The first concave rib 31 extends along the central axis J to a position that is more than half the distance H from the contact surface 14b to the lower limit position of the shoulder 12 in the direction along the central axis J. By forming the first concave ribs 31 over the body 13, when stress is applied to the bottle container 1 from above to below, the first concave ribs 31 act as pillars to support the force acting on the entire bottle container 1, improving buckling strength. Furthermore, by forming the first concave ribs 31 over the body 13, the range that acts as a stopper to prevent the propagation of dents when dents occur from the side is expanded in the height direction, further suppressing dents not only at the bottom of the side but also on the entire side. Furthermore, by forming the first concave ribs 31 over the body 13, a surface (panel) structure is achieved, and the structure is held down by the panel, which suppresses bulging of the body 13 when filled with liquid.

[0030] The second concave rib 32 is recessed into the bottle interior 1A. At least one second concave rib 32 is provided in the short diameter portion 22 of the body 13. As shown in FIG. 3, the second concave rib 32 is provided in each of the short diameter portions 22 located on both sides in the long diameter direction. The second concave rib 32 is formed from the body 13 to the bottom 14 and contacts the ground surface 14b. The second concave rib 32 is provided in the center of the short diameter portion 22 in the short diameter direction.

[0031] In the minor diameter portion 22 of the body portion 13 and the bottom portion 14, the second concave ribs 32 are provided in the center of the major diameter direction, where the wall thickness is thinnest and where dents are most likely to occur. Therefore, the second concave ribs 32 act as pillars to support the force, thereby preventing dents from occurring. Furthermore, if the second concave ribs 32 were not in contact with the ground surface 14b, the stress applied to the second concave ribs 32 would be concentrated in the region between the ground surface 14b and the second concave ribs 32. By bringing the second concave ribs 32 into contact with the ground surface 14b, the stress applied to the second concave ribs 32 can be dispersed over the entire ground surface 14b, thereby preventing dents from forming on the sides.

[0032] In addition, considering the impact resistance when the bottle container 1 is dropped, the second concave rib 32 may be configured to extend beyond the contact surface 14b and connect to the raised bottom portion 14c so that the range of force distribution extends not only to the contact surface 14b of the bottom 14 but also to the area of ​​the raised bottom portion 14c.

[0033] 3, when viewing the bottom portion 14 along the central axis J, if two second straight lines L3 are defined as lines extending in the major axis direction and defining the maximum width WL of the second concave rib 32, then the two intersections P1 and P2 between the second straight line L3 and the center line L1 of the first concave rib 31 are both located on the inside, closer to the central axis J than the outer periphery of the bottom-raised portion 14c. Of the intersections P1 and P2, the intersection P1 closest to the first concave rib 31 is located outside a perpendicular line L4 extending in the minor axis direction at a position half the distance from the central axis J to the outermost diameter in the major axis direction. In other words, the distance from the central axis J in the major axis direction of the intersection P1 is longer than the length LH, which is ¼ of the maximum length L.

[0034] Since the second concave ribs 32 provided on the short diameter portions 22 have a certain width relative to the first concave ribs 31 provided on the corner portions 23, stress can be received by the first concave ribs 31 on the corner portions 23 when the bottle container 1 is dropped or buckled. In addition, depressions on the short diameter portion 22 side can also be alleviated when the bottle container 1 is tipped or dropped from the short diameter portion 22 side, or when the sides are pressed against each other on the production line.

[0035] The line segment connecting the intersections of the center line L1 and the outermost contour of the first concave rib 31 located at the corner portion 23 on one side in the major axis direction is designated as L5. The ratio of the maximum width WL of the second concave rib 32 in contact with the outermost contour of the bottom portion 14 to the length of the line segment L5 is preferably 0.3 or more and 0.6 or less.

[0036] A plurality of third concave ribs 33 (four on each side in FIG. 3 ) are provided at circumferential intervals on the major diameter portion 21 located on both sides in the major diameter direction. In the bottom portion 14, the third concave ribs 33 are recessed upward toward the bottle interior 1A. In the bottom portion 14, the third concave ribs 33 extend linearly in a predetermined direction along the bottom surface 14a from the outermost periphery of the bottom surface 14a toward the raised bottom portion 14c when viewed along the central axis J. The predetermined direction in which the third concave ribs 33 extend is a direction normal to a tangent at a position where the major diameter portion 21 intersects with the center of the width of the third concave rib 33. By having the third concave ribs 33 extend in a direction normal to the tangent to the major diameter portion 21, the intersection angle between the circumferential side surface of the third concave rib 33 and the major diameter portion 21 becomes uniform on both sides in the major diameter direction, thereby equalizing the mold release resistance when the bottle container 1 is released from the mold after blow molding.

[0037] 1, the third concave ribs 33 extend upward from the bottom 14 to the body 13. Of the third concave ribs 33, the third concave rib 33A located on the outer side in the major axis direction extends upward further than the third concave rib 33B located on the inner side in the major axis direction.

[0038] The above-described first recessed rib 31, second recessed rib 32, and third recessed rib 33 constitute the recessed rib 30. That is, the recessed rib 30 includes the first recessed rib 31, second recessed rib 32, and third recessed rib 33. In this embodiment, the total number of recessed ribs 30 shown in Fig. 3 is 14. The total number of recessed ribs 30 is not limited to 14, and may be 13 or less or 15 or more.

[0039] When viewing the bottom 14 along the central axis J, it is preferable that the sum of the maximum opening distances of the recessed ribs 30 that contact the outermost contour of the bottom surface 14a is 25% or more and 53% or less of the maximum perimeter length of the bottom surface 14a.

[0040] If the sum of the maximum opening distances of the concave ribs 30 exceeds 53%, the spacing between adjacent concave ribs 30 becomes narrower, and the resin expanding during blow molding will first reach the parts recessed by the concave ribs 30. As a result, the resin is stretched and becomes thinner in areas where the concave ribs 30 are not provided during blow molding, which increases the difference in thickness depending on whether the concave ribs 30 are present or not, making the bottle container 1 more susceptible to cracking or dents when dropped.

[0041] Furthermore, when there are a large number of recessed ribs 30 and their arrangement is complex, resin is required to mold the recessed ribs 30, which reduces the amount of resin per unit area, making the bottle container 1 more susceptible to cracks and dents when dropped. When the sum of the maximum opening distances of the recessed ribs 30 is less than 25%, this means that there are only a few recessed ribs 30 or the width of the recessed ribs 30 is significantly small. In this case, the recessed ribs 30 are not suitable for achieving the effects of the present invention, and therefore the effects of the present invention cannot be fully obtained.

[0042] The pitch width of the recessed ribs 30 is preferably 1.8% or more and 5% or less, and more preferably 3.3% or more and 5% or less, relative to the maximum perimeter length of the bottom surface 14a. If the pitch width of the concave ribs 30 is less than 1.8%, the intervals between adjacent concave ribs 30 become too close, and the resin that expands during blow molding will first reach the parts that are recessed by the concave ribs 30. Therefore, in the parts where the concave ribs 30 are not provided during blow molding, the resin is stretched and the wall thickness becomes thinner, and the difference in wall thickness between the presence and absence of the concave ribs 30 becomes large, making the bottle container 1 more susceptible to cracks and dents when dropped. If the pitch width of the recessed ribs 30 exceeds 5%, the number of recessed ribs 30 will be small or the width of the recessed ribs 30 will be significantly small, which will not satisfy the configuration of the recessed ribs 30 suitable for the effects of the present invention, and the effects of the present invention will not be fully obtained.

[0043] FIG. 4 is a partially enlarged view of FIG. As shown in Figure 4, the intersection angle between the long axis J1, which passes through the central axis J and extends in the long diameter direction, and the center line L1 of the first concave rib 31 is defined as θ1. The intersection angle between the long axis J1 and the center line of the third concave rib 33A is defined as θ2. The intersection angle between the long axis J1 and the center line of the third concave rib 33B is defined as θ3. From the perspective of suppressing the occurrence of stress concentration points, it is preferable to satisfy the relationship θ1<θ2<θ3<90°.

[0044] 1, the maximum height of the first recessed rib 31 from the ground surface 14b is defined as H1. The maximum height of the third recessed rib 33A from the ground surface 14b is defined as H2. The maximum height of the third recessed rib 33B from the ground surface 14b is defined as H3. The heights of the first recessed rib 31, the third recessed rib 33A, and the third recessed rib 33B preferably satisfy the relationship H1 > H2 ≧ H3.

[0045] As a result, the first concave rib 31, the third concave rib 33A, and the third concave rib 33B act as stoppers for the propagation of the dent at positions close to the short diameter portion 22, and can reduce the range of the dent when the dent occurs from the side of the short diameter portion 22. Furthermore, the first concave rib 31, the third concave rib 33A, and the third concave rib 33B hold back the dent with a surface (panel) having a wider area, and can also suppress the expansion of the body portion 13 of the bottle container 1 when filled with liquid.

[0046] As described above, in the bottle container 1 of this embodiment, the bottom 14 has a first concave rib 31 that extends linearly from the bottom surface 14a to the bottle interior 1A from the recessed corner portion 23 in a predetermined direction along the bottom surface 14a, and the area sandwiched between two straight lines L2 that extend in the predetermined direction and form the maximum width of the first concave rib 31 is away from the center of the bottom surface 14a, making it possible to suppress defects such as dents that occur in the bottom 14.

[0047] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to these examples. The shapes and combinations of the components shown in the above examples are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present invention.

[0048] For example, in the above embodiment, a configuration in which two second recessed ribs 32 are provided is exemplified, but this configuration is not limited to this. The second recessed rib 32 may be provided in a configuration in which only one or three or more are provided. However, since the wall tends to be thin in the minor axis direction, and adding multiple second recessed ribs 32 may further thin the wall, which may lead to molding defects or cracks when dropped, a configuration in which one second recessed rib is provided on each minor axis, for a total of two, is more preferable.

[0049] The present disclosure includes the following aspects. [1] A bottle container having a mouth, shoulder, body, and bottom arranged along a central axis, and formed of a synthetic resin material, wherein the ratio of the full capacity to the weight of the synthetic resin material is 25 ml / g or more, the bottom surface of the bottom is approximately rectangular with a first direction perpendicular to the central axis as the major axis direction and a second direction perpendicular to the central axis and the first direction as the minor axis direction, the maximum length in the first direction being greater than the maximum length in the second direction, the body and the bottom have a major axis portion extending in the major axis direction, a minor axis portion extending in the minor axis direction, and corner portions connecting the major axis portion and the minor axis portion, the bottom has a first concave rib recessed from the bottom surface into the bottle and extending linearly from the corner portion in a predetermined direction along the bottom surface, and the area sandwiched between two straight lines extending in the predetermined direction and forming the maximum width of the first concave rib is away from the center of the bottom surface.

[0050] [2] The bottle container described in [1] above, wherein the bottom has a contact surface, the short diameter portion of the body has at least one second concave rib recessed into the bottle, and the second concave rib is formed from the body to the bottom and contacts the contact surface.

[0051] [3] The bottle container described in [2], wherein the bottom has a raised bottom portion that is surrounded by the contact surface and recessed into the bottle, and when the bottom is viewed along the central axis, the two intersections of two second straight lines that extend in the first direction and form the maximum width of the second concave rib with the center line of the concave rib are located inside and closer to the central axis than the outer periphery of the raised bottom portion.

[0052] [4] The bottle container according to [2] or [3], wherein the second concave rib is located at the center of the short diameter portion in the second direction.

[0053] [5] A bottle container according to any one of [2] to [4], wherein, when the bottom is viewed along the central axis, the sum of the maximum opening distances of the concave ribs, including the first concave rib and the second concave rib that are in contact with the outermost contour of the bottom surface, is 25% or more and 53% or less of the maximum peripheral length of the bottom surface.

[0054] [6] A bottle container described in any one of [2] to [5], wherein the first concave rib extends along the central axis to a position that is more than half the distance along the central axis from the contact surface to the lowermost position of the shoulder portion.

[0055] [7] A bottle container according to any one of [1] to [6], wherein the bottle is filled with liquid detergent.

[0056] [8] The bottle container according to any one of [1] to [7], wherein the synthetic resin material is polyethylene terephthalate. [Explanation of symbols]

[0057] 1...bottle container, 1A...interior of bottle, 11...mouth portion, 12...shoulder portion, 13...body portion, 14...bottom, 14a...bottom surface, 14b...contact surface, 14c...raised bottom portion, 21...long diameter portion, 22...short diameter portion, 23...corner portion, 30...concave rib, 31...first concave rib, 32...second concave rib, 33...third concave rib, J...center axis, L1...center line, L2...straight line, L3...second straight line, P1, P2...intersection point

Claims

1. The container has a mouth, a shoulder, a body, and a bottom, which are arranged along a central axis, and is made of a synthetic resin material; The ratio of the full capacity to the weight of the synthetic resin material is 25 ml / g or more; a bottom surface of the bottom portion has a substantially rectangular shape with a first direction perpendicular to the central axis as a major axis direction and a second direction perpendicular to the central axis and the first direction as a minor axis direction, and a maximum length in the first direction is greater than a maximum length in the second direction; The body and the bottom are a major diameter portion extending in the major diameter direction; a minor diameter portion extending in the minor diameter direction; a corner portion connecting the major diameter portion and the minor diameter portion; and the bottom portion has a first concave rib recessed from the bottom surface into the bottle interior and extending linearly from the corner portion in a predetermined direction along the bottom surface, A bottle container, wherein a region sandwiched between two straight lines extending in the predetermined direction and forming the maximum width of the first concave rib is away from the center of the bottom surface.

2. the bottom portion has a ground surface; The short diameter portion of the body portion has at least one second concave rib recessed into the bottle, The second concave rib is formed from the body portion to the bottom portion and contacts the ground surface. The bottle container according to claim 1.

3. The bottom portion has a raised bottom portion that is surrounded by the ground surface and recessed into the bottle, When the bottom portion is viewed along the central axis, two intersections of two second straight lines extending in the first direction and forming the maximum width of the second concave rib with the center line of the first concave rib are located closer to the central axis than the outer periphery of the bottom-raised portion. The bottle container according to claim 2.

4. The second concave rib is located at the center of the minor diameter portion in the second direction. The bottle container according to claim 2.

5. When the bottom portion is viewed along the central axis, a sum of maximum opening distances of the concave ribs, including the first concave rib and the second concave rib that contact the outermost contour of the bottom surface, is 25% or more and 53% or less of a maximum periphery length of the bottom surface. The bottle container according to any one of claims 2 to 4.

6. the first concave rib extends along the central axis to a position that is equal to or greater than half of the distance from the ground contact surface to a lower limit position of the shoulder portion in a direction along the central axis; The bottle container according to any one of claims 2 to 4.

7. The bottle is filled with liquid detergent. The bottle container according to claim 1.

8. The synthetic resin material is polyethylene terephthalate. The bottle container according to claim 1.

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