Bottle container

Abstract

To provide a bottle container that can suppress problems occurring in the shoulder area. [Solution] The device comprises a mouth portion, shoulder portion, body portion, and bottom portion arranged along a central axis, and is made of synthetic resin material. The shoulder portion and body portion are substantially rectangular in shape, having a first portion extending in a first direction perpendicular to the central axis, and a second portion extending in a second direction perpendicular to both the central axis and the first direction. The shoulder portion and the body portion have a corner portion connecting the first portion and the second portion, and a concave rib provided in the corner portion that spans the shoulder portion and body portion and extends along the central axis. The concave rib has a deformable portion that deforms toward the center of the second direction in the second portion as it approaches the mouth portion, and the tip of the deformable portion is located in the shoulder portion and is arranged apart in the second direction with respect to the central axis.

Description

【Technical Field】 【0001】 The present invention relates to a bottle container. 【Background Art】 【0002】 In recent years, due to environmental considerations, bottle containers have been made thinner, and the bottle containers are more likely to be dented due to the thinning. In particular, when the cross-sectional shape having a major diameter portion and a minor diameter portion is substantially rectangular rather than a cylindrical shape, for example, when blow molding, the minor diameter portion tends to be thinner. 【0003】 Therefore, in the above-mentioned bottle container, there is a problem that the shoulder portion in the minor diameter portion is likely to be dented due to tipping, dropping, or pressure on the production line. For example, Patent Document 1 discloses a container in which a plurality of inclined ribs inclined in the bottle axis direction and the circumferential direction are provided on the body portion when viewed from the outside in the radial direction. It is disclosed that when the body portion of the container of Patent Document 1 elastically deforms inward in the radial direction, the plurality of inclined ribs widen, making it easier for the body portion to elongate. 【Prior Art Documents】 【Patent Documents】 【0004】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2022-169871 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 The container disclosed in Patent Document 1 is a countermeasure when the body portion is elastically deformed, and does not mention the denting of the shoulder portion that tapers from the body portion to the mouth portion. Further, Patent Document 1 discloses a configuration in which vertical ribs extending straight in the direction along the bottle axis are integrally formed from the connection portion between the mouth portion and the shoulder portion through the shoulder portion to the lower end portion of the body portion, but it cannot be said that it is sufficient as a countermeasure against the denting of the shoulder portion. 【0006】 This invention has been made in consideration of the above points, and aims to provide a bottle container that can suppress problems occurring in the shoulder area. [Means for solving the problem] 【0007】 The present invention has the following aspects. It has a mouth, shoulders, torso, and bottom arranged along a central axis, and is made of synthetic resin material. The shoulder portion and the torso portion are substantially rectangular in shape, having a first portion extending in a first direction perpendicular to the central axis and a second portion extending in a second direction perpendicular to both the central axis and the first direction. The aforementioned shoulder portion and the aforementioned torso portion are, A corner portion connecting the first and second portions, A concave rib is provided at the corner portion and extends along the central axis, spanning the shoulder portion and the torso portion, It has, The concave rib has a deformable portion that deforms toward the center of the second direction in the second portion as it approaches the mouth portion, The tip of the deformed portion is located on the shoulder portion and is positioned apart in the second direction with respect to the central axis, in a bottle container. [Effects of the Invention] 【0008】 This invention makes it possible to provide a bottle container that can suppress problems occurring in the shoulder area. [Brief explanation of the drawing] 【0009】 [Figure 1] This figure shows an embodiment of the present invention, and is a front view of a bottle container. [Figure 2] This is a side view of the bottle container. [Figure 3] This is a bottom view of the bottle container. [Figure 4] This is a partially enlarged view of the area around the minor diameter portion 12B and the minor diameter portion 13B. [Modes for carrying out the invention] 【0010】 Hereinafter, embodiments of the bottle container of the present invention will be described with reference to Figures 1 to 4. The following embodiments represent one aspect of the present invention and are not intended to limit it. They can be modified at will within the scope of the technical idea of ​​the present invention. Furthermore, in the following drawings, the scale and number of components in each structure differ from the actual structure in order to make the components easier to understand. 【0011】 Figure 1 is a front view of bottle container 1. Figure 2 is a side view of bottle container 1. Figure 3 is a bottom view of bottle container 1. 【0012】 As shown in Figures 1 and 2, the bottle container 1 has a mouth portion 11, a shoulder portion 12, a body portion 13, and a bottom portion 14 arranged coaxially with a central axis J extending in the vertical direction, and these portions are connected in this order from top to bottom. As an example, liquid detergent is filled into the bottle container 1. Hereinafter, when viewed from above and below along the central axis J, the direction intersecting the central axis J is called the radial direction, and the direction revolving around the central axis J is called the circumferential direction. Furthermore, in the direction along the central axis J, the side where the mouth portion 11 is located is called the upper side, and the side where the bottom portion 14 is located is called the lower side. 【0013】 The bottle container 1 is formed by blow molding a preform that has been formed into a bottomed cylindrical shape by injection molding, and is integrally formed from a synthetic resin material such as polyethylene terephthalate or polypropylene. A cap 15 (see Figure 4) is attached to the mouth 11. 【0014】 The full capacity of the bottle container 1 is defined as the volume when the bottle container 1 is filled with liquid up to the top of the mouth 11 without the cap attached. In this embodiment, the ratio of the full capacity to the weight of the synthetic resin material in the bottle container 1 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 wall thickness of the bottle container 1 becomes thinner, making molding difficult. Therefore, the above ratio is preferably between 25 ml / g and 50 ml / g. 【0015】 The bottle container 1 of this embodiment preferably has a capacity of 500 ml or more in order to easily obtain the effects of the present invention. The setting of the upper limit of the full filling capacity is not particularly essential, but for example, the upper limit is preferably 2000 ml or less. 【0016】 The body portion 13 extends in the vertical direction. The bottom portion 14 extends downward with a reduced diameter from the lower end of the body portion 13. As shown in FIG. 3, the outermost periphery of the bottom surface 14a of the bottom portion 14 and the body portion 13 are substantially rectangular in which the maximum length L in the first direction (the left-right direction in FIG. 3) orthogonal to the central axis J is larger than the maximum length W in the second direction (the vertical direction in FIG. 3) orthogonal to both the central axis J and the first direction (i.e., having the relationship L>W). In this embodiment, the first direction is called the major axis direction, and the second direction is called the minor axis direction. 【0017】 The bottom surface 14a of the bottom portion 14 is the surface facing downward in the bottom portion 14. The bottom surface 14a has a grounding surface 14b and a bottom raising portion 14c. The grounding surface 14b is the surface located at the lowermost side of the bottom surface 14a. The grounding surface 14b is the surface that contacts the placement surface 10 when the bottle container 1 is placed on the placement surface with the bottom portion 14 facing downward as shown in FIG. 1. The grounding surface 14b is located inside the radial direction of the ridge line 14d shown by the two-dot chain line that is reduced similarly inside the radial direction with respect to the outermost periphery of the bottom surface 14a as shown in FIG. 3. 【0018】 When viewed along the central axis J, the shoulder portion 12, the body portion 13, and the bottom portion 14 have a major axis portion (first portion) 21, a minor axis portion (second portion) 22, and a corner portion 23. The major axis portion 21 extends in the major axis direction, has an arc center on the side closer to the central axis J, and is arc-shaped bulging outward in the radial direction. The minor axis portion 22 extends in the minor axis direction, has an arc center on the side closer to the central axis J, and is arc-shaped bulging outward in the radial direction. The corner portion 23 is located at the intersection of the major axis portion 21 and the minor axis portion 22 and connects the major axis portion 21 and the minor axis portion 22. 【0019】 In the following description, in the shoulder portion 12, the major diameter portion 12A, the minor diameter portion 12B, and the corner portion 12C may be referred to, and in the body portion 13, the major diameter portion 13A, the minor diameter portion 13B, and the corner portion 13C may be referred to. 【0020】 The body portion 13 has a length L in the major diameter direction and a length W in the minor diameter direction at both ends in the direction along the central axis J. The boundary between the shoulder portion 12 and the body portion 13 is a position where the length in the major diameter direction is smaller than the length L and the length in the minor diameter direction is smaller than the length W. 【0021】 Here, when the height from the grounding surface 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 diameter direction < HM < maximum length L × 3, and it is more preferable to satisfy the relationship of the maximum length L in the major diameter direction < HM < maximum length W × 2. 【0022】 Also, 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 W × 1.35 < HM < maximum length W × 7.5 in the minor diameter direction, and it is more preferable to satisfy the relationship of the maximum length W × 1.35 < HM < maximum length W × 5. 【0023】 The ratio L / W, which is the ratio of the maximum length L to the maximum length W, 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. 【0024】 A concave rib 31 is provided in the corner portion 23. The concave rib 31 extends along the central axis J. The concave rib 31 opens to the bottom surface 14a on the lower side. The concave rib 31 straddles the shoulder portion 12 and the body portion 13 on the upper side. The concave rib 31 has a deformed portion 32 on the upper side. 【0025】 The deformed portion 32 deforms (bends) in a direction toward the central axis J1, which is the center in the minor axis direction of the minor axis portion 12B, as it moves toward the upper side (mouth side). As shown in Figure 3, the central axis J1 is the central axis on the sides of the body portion 13, located at both ends in the major axis direction and in the center in the minor axis direction, and extends vertically as shown in Figures 1 and 2. As shown in Figure 2, the deformed portion 32 is curved in a curved shape when viewed in the major axis direction. The deformed portion 32 is curved in an arc shape with the center of curvature on the central axis J1 side. The upper tip of the deformed portion 32 is located on the shoulder portion 12 and is positioned away from the central axis J1 in the minor axis direction. When viewed in the major axis direction, the deformed portion 32 is arranged symmetrically in the minor axis direction with respect to the central axis J1. Therefore, when viewed in the major axis direction, the deformed portions 32 located on both sides in the minor axis direction with respect to the central axis J1 are deformed in a direction that brings them closer together. 【0026】 The concave rib 31 curves and deforms toward the central axis J1 in the deformed portion 32, and because it has a length component in the minor axis direction, when the shoulder portion 12 is recessed from the minor axis portion 12B, the curved deformed portion 32 acts as a stopper for the propagation of the recess upward, thereby suppressing the recess of the minor axis portion 12B in the shoulder portion 12. In addition, because the concave rib 31 is arranged from the body portion 13 to the shoulder portion 12 in the deformed portion 32, stress can be propagated from the deformed portion 32 and relieved towards the body portion 13, thus preventing stress from concentrating in the shoulder portion 12. Furthermore, since the portion enclosed by the deformed portion 32 is supported by columns, rigidity can also be improved. 【0027】 In the following, since the deformed portion 32 is arranged symmetrically in the minor axis direction, only one of them may be described as representative. 【0028】 Figure 4 is a partially enlarged view of the area around the minor diameter portion 12B and the minor diameter portion 13B. Viewed in the major axis direction, the base end (starting point) of the deformed portion 32 is defined as n1. The first arc C1 is defined as the arc centered at position n2, which is located a distance of the maximum length W described above, from the base end n1 towards the center in the minor axis direction. The second arc C2 is defined as the arc centered at position n4, which is located a distance W towards the center in the minor axis direction, from the midpoint n3 between the base end n1 and the central axis J1. The center line of the groove in the deformed portion 32 is positioned between the first arc C1 and the second arc C2. 【0029】 For example, if the deformed portion 32 protrudes towards the center in the minor axis direction beyond the second arc C2, the distance between the tips of the deformed portions 32 on both sides in the minor axis direction becomes narrow, and stress concentrates in that gap. Therefore, it is possible that the indentation of the minor axis portion 12B in the shoulder portion 12 starting from this gap will be promoted. In addition, the narrow distance between the tips of the deformed portions 32 will worsen the moldability of the deformed portions 32, and may also reduce the release properties after molding. 【0030】 As described above, in order for the deformation portion 32 to function as a stopper for the propagation of the indentation upward, it is necessary to secure a length component in the minor axis direction. On the other hand, when the deformation portion 32 protrudes outward in the minor axis direction from the first arc C1, in order to secure a length component in the minor axis direction, it is necessary to extend the tip to the vicinity of the mouth portion 11, as shown by the dashed line as deformation portion 32A in Figure 4. In this case, the area enclosed by the deformation portion 32A from the minor axis portion 12B to the minor axis portion 13B constitutes a large surface. At this time, the area in which the indentation is suppressed by the deformation portion 32 becomes wider, and there is a possibility that the indentation will propagate to the vicinity of the mouth portion 11 and become significantly indented, which is undesirable. In contrast, in the case of a deformation portion 32 that satisfies the above conditions, the base end n1 of the deformation portion 32 does not become a stress concentration point, so it can act as a stopper for the propagation of the indentation upward to the shoulder portion 12 and exert the effect of suppressing the indentation of the minor axis portion 12B in the shoulder portion 12. 【0031】 Furthermore, P1 is defined as the intersection point of the second arc C2 and the central axis J1 when viewed in the direction of the major axis. Preferably, the tip of the deformed portion 32 is located below the intersection point P1. If the tip of the deformed portion 32 is located above the intersection point P1, the deformed portions 32 located on both sides in the minor axis direction will intersect, reducing moldability. In addition, stress will concentrate at the intersection of the deformed portions 32, which may promote indentation of the shoulder portion 12 around the intersection. In contrast, by positioning the tip of the deformed portion 32 below the intersection point P1, the area over which the indentation propagates to the upper side of the shoulder portion 12 is reduced by the deformed portion 32, thereby minimizing the indentation of the minor axis portion 12B in the shoulder portion 12. 【0032】 Furthermore, regarding the vertical direction, a preferred range for the deformable portion 32 is such that, when viewed in the major axis direction, if P2 is the intersection point between the boundary between the shoulder portion 12 and the torso portion 13 and the central axis J1, the deformable portion 32 is positioned between the first arc C1 and the second arc C2 in the minor axis direction, and between the intersection point P1 and the intersection point P2 in the vertical direction. 【0033】 For example, if the tip of the deformable portion 32 is located below the intersection point P2, the deformable portion 32 will not be provided on the shoulder portion 12, and the shoulder portion 12 will not function as a stopper for the propagation of the dent. In this case, the rigidity of the shoulder portion 12 will decrease, and a dent in the short-axis portion 12B will be more likely to occur on the shoulder portion 12. Therefore, the shape of the shoulder portion 12 will not satisfy the dent suppression effect, and the dent suppression effect will not be obtained. In contrast, the dent suppression effect can be achieved by positioning the deformable portion 32 between the first arc C1 and the second arc C2 in the short-axis direction, and between the intersection point P1 and the intersection point P2 in the vertical direction. 【0034】 The groove depth of the deformed portion 32 decreases as it moves from the base end to the tip end. As the depth of the grooves in the deformed portion 32 decreases towards the tip, the conformability of the shrink label is improved when covering the outer surface with the shrink label. This prevents the shrink label from lifting. In addition, the unevenness of the label on the shoulder portion 12 is reduced, making it less likely to be damaged when loaded into cardboard boxes or the like. 【0035】 Furthermore, the short-diameter portions 12B and 13B have a second concave rib 33 that spans the shoulder portion 12 and the body portion 13. The second concave rib 33 is located between the deformed portions 32 (concave ribs 31) located on both sides in the short-diameter direction. The second concave rib 33 is recessed from the short-diameter portions 12B and 13B toward the inside 1A of the bottle. If the second concave rib 33 is not provided, the stress on the shoulder portion 12 will concentrate in the region between the deformed portions 32 in the short-diameter portion 12B. On the other hand, by providing the second concave rib 33, the range (distance) of deformation in the short-diameter portion 12B can be reduced (shortened), making it less likely to dent and easier to return to its original shape. Therefore, in conjunction with the provision of the deformed portions 32, it can contribute to suppressing denting of the short-diameter portion 12B in the shoulder portion 12. 【0036】 A more preferable range for the deformed portion 32 in the vertical direction is that, when viewed in the major axis direction, if P3 is the intersection point between the upper end of the second concave rib 33 and the central axis J1, then it is preferable that the tip of the deformed portion 32 is positioned between the first arc C1 and the second arc C2 in the minor axis direction, and between the intersection point P1 and the intersection point P3 in the vertical direction. 【0037】 For example, when buckling stress is applied to the bottle container 1 from above and below, the ribs with shallow grooves are the first to receive the force. Ribs with shallow grooves have a weaker structure and cannot withstand the external forces from above and below, resulting in a decrease in the buckling strength of the bottle container 1, which is undesirable. Also, because the tips of the longitudinal ribs and the upper ends of the concave ribs are aligned in a straight line, buckling may occur starting from the tips of the ribs. 【0038】 In contrast, if the length (size) of the deformed portion 32 is such that its tip is positioned between the first arc C1 and the second arc C2 in the minor axis direction, and between the intersection points P1 and P3 in the vertical direction, the area over which the indentation is propagated to the upper part of the shoulder portion 12 by the deformed portion 32 becomes smaller. Therefore, the effect of minimizing the indentation of the minor axis portion 12B in the shoulder portion 12 can be achieved. 【0039】 The short-axis portion 12B of the shoulder portion 12 is formed by joining multiple panels (panel ribs) 12D along the short-axis direction. Each panel 12D connects the mouth portion 11 and the torso portion 13. The tip of the deformation portion 32 is positioned away from the intersection of the multiple panels 12D. If the tip of the deformed portion 32 is positioned outside the intersection of the panel 12D in the minor axis direction, the range of deformation increases, the suppression of dent propagation decreases, and a buckling dent extending diagonally across the central axis J1 occurs. On the other hand, if the tip of the deformed portion 32 is positioned inside the intersection of the panel 12D in the minor axis direction, the spacing between the deformed portions 32 positioned on both sides in the minor axis direction becomes denser, and the moldability of the deformed portion 32 decreases. 【0040】 In contrast, by positioning the tip of the deformable portion 32 away from the intersection of the multiple panels 12D, the strength of the panel 12D can be utilized against the indentation of the short-diameter portion 12B in the shoulder portion 12, and the deformation portion 32 can suppress the reduction in buckling strength originating from the panel 12D and the indentation of the short-diameter portion 12B. 【0041】 As described above, in the bottle container 1 of this embodiment, the concave rib 31 provided at the corner portion 23 and extending along the central axis J across the shoulder portion 12 and the body portion 13 has a deformable portion 32 that deforms toward the center in the minor axis direction of the minor axis portions 12B and 13B as it moves upward, and the tip of the deformable portion 32 is located on the shoulder portion 12 and is arranged apart in the minor axis direction with the central axis J1 in between, so it is possible to suppress defects such as dents that occur on the shoulder portion 12. 【0042】 Preferred embodiments of the present invention have been described above with reference to the attached drawings, but it goes without saying that the present invention is not limited to these examples. The shapes and combinations of the constituent members shown in the above examples are merely examples, and can be modified in various ways based on design requirements, etc., without departing from the spirit of the present invention. 【0043】 For example, in the above embodiment, a configuration was illustrated in which the maximum length of the bottom surface 14a of the bottom portion 14 in the first direction is greater than the maximum length in the second direction, but the configuration is not limited to this. For example, a configuration in which the maximum length of the bottom surface 14a of the bottom portion 14 in the first direction and the maximum length in the second direction are the same is also possible. 【0044】 This disclosure includes the following aspects: [1] A structure comprising a mouth, shoulders, torso, and bottom arranged along a central axis, formed of a synthetic resin material, wherein the shoulders and torso are substantially rectangular in shape, having a first portion extending in a first direction perpendicular to the central axis and a second portion extending in a second direction perpendicular to both the central axis and the first direction, the shoulders and torso have a corner portion connecting the first portion and the second portion, and a concave rib provided in the corner portion and extending along the central axis across the shoulders and torso, the concave rib having a deformable portion that deforms toward the center of the second direction in the second portion as it approaches the mouth, The tip of the deformed portion is located on the shoulder portion and is positioned apart in the second direction with respect to the central axis, in a bottle container. 【0045】 [2] The bottle container according to [1], wherein, if the maximum length of the body in the second direction is W, the center line of the groove in the deformed portion is located between a first arc whose center is at a distance W from the base end of the deformed portion toward the center in the second direction when viewed in the first direction, and a second arc whose center is at a distance W from the midpoint between the base end and the central axis toward the center in the second direction when viewed in the first direction. 【0046】 [3] If the maximum length of the body in the second direction is W, The bottle container according to [1] or [2], wherein the tip of the deformed portion is located on the bottom side in a direction along the central axis, rather than the intersection point of the central axis with a second arc whose center is at a distance W from the midpoint between the base end of the deformed portion and the central axis in the second direction when viewed in the first direction. 【0047】 [4] The bottle container according to any one of [1] to [3], wherein the deformation portion has a groove depth that decreases from the base end to the tip of the deformation portion. 【0048】 [5] The bottle container according to any one of [1] to [4], wherein the second portion has a second recessed rib that spans the shoulder portion and the torso portion, the second recessed rib being located between the recessed ribs in the second direction. 【0049】 [6] The bottle container according to any one of [1] to [5], wherein the second portion of the shoulder is made up of multiple panels joined together along the second direction, and the tip of the deformed portion is positioned away from the intersection of the multiple panels. 【0050】 [7] The bottle container according to any one of [1] to [6], wherein the bottom surface of the bottom has a maximum length in the first direction greater than the maximum length in the second direction. [Explanation of symbols] 【0051】 1…Bottle container, 1A…Inside of bottle, 11…Mouth, 12…Shoulder, 12A, 13A…Long diameter section (first part), 12B, 13B…Short diameter section (second part), 12D…Panel (panel rib), 13…Body, 14…Bottom, 14a…Bottom surface, 21…Long diameter section (first part), 22…Short diameter section (second part), 23…Corner section, 31…Concave rib, 32…Deformed section, 33…Second concave rib, C1…First arc, C2…Second arc, J…Central axis, J1…Central axis on the side of the body, n1…Base end, P1…Intersection

Claims

[Claim 1] It has a mouth, shoulders, torso, and bottom arranged along a central axis, and is made of synthetic resin material. The shoulder portion and the torso portion are substantially rectangular in shape, having a first portion extending in a first direction perpendicular to the central axis and a second portion extending in a second direction perpendicular to both the central axis and the first direction. The aforementioned shoulder portion and the aforementioned torso portion are, A corner portion connecting the first portion and the second portion, A concave rib is provided at the corner portion and extends along the central axis, spanning the shoulder portion and the torso portion, It has, The concave rib has a deformable portion that deforms toward the center of the second direction in the second portion as it approaches the mouth, The tip of the deformed portion is located on the shoulder portion and is positioned apart in the second direction with respect to the central axis, in a bottle container. [Claim 2] If the maximum length of the torso in the second direction is W, The center line of the groove in the deformed portion is positioned between a first arc whose center is at a distance W from the base end of the deformed portion toward the center in the second direction when viewed in the first direction, and a second arc whose center is at a distance W from the midpoint between the base end and the central axis toward the center in the second direction when viewed in the first direction. The bottle container according to claim 1. [Claim 3] If the maximum length of the torso in the second direction is W, The tip of the deformed portion is located on the bottom side in a direction along the central axis, rather than the intersection point of the central axis with the second arc whose center is at a distance W from the midpoint between the base end of the deformed portion and the central axis in the second direction when viewed in the first direction. The bottle container according to claim 1. [Claim 4] The depth of the groove in the deformed portion decreases as it moves from the base end to the tip. A bottle container according to any one of claims 1 to 3. [Claim 5] The second portion has a second concave rib that spans the shoulder portion and the torso portion, The second concave rib is located between the concave ribs in the second direction, A bottle container according to any one of claims 1 to 3. [Claim 6] The second portion of the shoulder is formed by joining multiple panels along the second direction, The tip of the deformed portion is positioned away from the intersection of the multiple panels. A bottle container according to any one of claims 1 to 3. [Claim 7] The bottom surface of the bottom portion has a maximum length in the first direction that is greater than the maximum length in the second direction. A bottle container according to any one of claims 1 to 3.

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