JP6685842B2 - Blow molded container - Google Patents

Description

  The present invention relates to a bottle-shaped blow-molded container having a vacuum absorption panel.

  2. Description of the Related Art Conventionally, hot filling has been performed in which contents such as beverages are filled in a container in a high temperature state for sterilization. Further, in such a bottle-shaped blow-molded container in which high temperature filling is performed, a decompression absorption panel that absorbs (reduces) the reduced pressure generated inside the container during cooling after high temperature filling is provided on the body or shoulder of the container. Is common (for example, see Patent Document 1). By absorbing the reduced pressure generated inside the container by the deformation of the reduced pressure absorption panel, it is possible to prevent the container from being permanently deformed (plastic deformation) and impairing its appearance.

JP, 2013-95479, A

  Even in a blow-molded container having such a reduced-pressure absorption panel, further improvement of the reduced-pressure absorption capacity (the amount of decrease in internal volume until permanent deformation occurs when the inside of the container is gradually decompressed) is desired.

  The present invention has been developed in view of such problems, and an object thereof is to provide a blow-molded container that can advantageously improve the reduced-pressure absorption capacity.

  The blow-molded container of the present invention is connected to a tubular mouth portion, a shoulder portion that is connected to the mouth portion and gradually increases in diameter downward, and is connected to the shoulder portion through a connecting bent portion that bends downward. A plurality of decompression absorption panels, which are bottle-shaped and have a body and a bottom that closes the lower end of the body, and are arranged in the body in the circumferential direction at intervals. A plurality of vertical ribs extending from each of the panels toward the shoulder portion and having a groove shape that is recessed inward of the container; and outer peripheral edges of the plurality of reduced pressure absorption panels, respectively, on substantially the entire circumference thereof. It is characterized in that it is bent inward from the outer surface thereof toward the inside of the container, and each of the plurality of vertical ribs extends through the connecting bent portion to reach the shoulder portion.

  Further, in the blow-molded container of the present invention, the plurality of vertical ribs are at least two so as to extend from a position symmetrical with respect to each of the plurality of reduced-pressure absorption panels from a circumferential center of the reduced-pressure absorption panel. It is preferably provided.

  Further, in the blow-molded container of the present invention, it is preferable that the plurality of vertical ribs be provided in a pair for each of the plurality of reduced pressure absorption panels so as to extend from both ends in the circumferential direction of the reduced pressure absorption panel. .

  Further, in the blow-molded container of the present invention, it is also preferable that each of the plurality of vertical ribs extends to an upper portion of the shoulder portion.

  Further, in the blow-molded container of the present invention, it is preferable that each of the plurality of reduced pressure absorbing panels has a rectangular shape.

  Further, in the blow-molded container of the present invention, it is also preferable that the upper ends of the plurality of vertical ribs are surrounded by a convex portion or a concave portion formed on the shoulder portion.

  Further, in the blow-molded container of the present invention, the body has a plurality of panel forming surfaces of the same shape in which the plurality of reduced pressure absorbing panels are formed one by one, and two panel forming surfaces adjacent to each other. Each of the plurality of vertical ribs corresponding to each of the plurality of reduced pressure absorption panels is formed by a plurality of connection surfaces having the same shape and interconnected with each other, and the plurality of vertical ribs correspond to each other. It is preferable that the two have the same shape.

  Further, in the blow-molded container of the present invention, it is preferable that the body has an octagonal columnar shape including four panel forming surfaces and four connecting surfaces.

  According to the present invention, it is possible to provide a blow-molded container that can advantageously improve the vacuum absorption capacity.

It is a side view which shows the blow molding container which concerns on 1st Embodiment of this invention, and a two-dot chain line shows the outline when a blow molding container is rotated 45 degrees in the figure. It is a top view of the blow molding container shown in FIG. It is a bottom view of the blow molding container shown in FIG. It is a side view which shows the blow molding container which concerns on 2nd Embodiment of this invention, and a two-dot chain line shows an outline when a blow molding container is rotated 45 degrees in the figure. It is a top view of the blow molding container shown in FIG. It is a side view which shows the blow molding container which concerns on 3rd Embodiment of this invention, and a two-dot chain line shows an outline when a blow molding container is rotated by 45 degrees in the figure. It is a top view of the blow molding container shown in FIG. It is a side view which shows the blow molding container which concerns on 4th Embodiment of this invention, and a two-dot chain line shows the outline when a blow molding container is rotated by 45 degrees in the figure. It is a side view which shows the blow molding container of a comparative example, and a two-dot chain line shows an outline when a blow molding container is rotated 45 degrees in the figure.

  Hereinafter, blow molding containers (hereinafter, also simply referred to as “container”) according to various embodiments of the present invention will be described in detail with reference to the drawings.

  In addition, "upper" described in the following description means one end side where the mouth portion is located with respect to the body portion, and "lower" is one end side where the mouth portion is located with respect to the body portion. It means the opposite other end side, that is, the other end side where the bottom is located with respect to the body.

  Further, the "circumferential direction" means, in a plane perpendicular to the central axis of the mouth portion, along the wall surface of the container, a direction when orbiting around the central axis, and the "radial direction" means It means the direction orthogonal to the central axis of the mouth. Furthermore, “expanding” means that the radial projection width is increased.

  Further, the "longitudinal section" means a section including the central axis of the mouth portion, and the "transverse section" means a section perpendicular to the central axis.

  First, with reference to FIGS. 1 to 3, a blow molding container 1 according to a first embodiment of the present invention will be described as an example.

  The container 1 can be formed by biaxial stretch blow molding in which a hollow product is formed from a preform (container material) formed in a bottomed tubular shape from a synthetic resin material such as PET (polyethylene terephthalate). Further, the container 1 is an EBM molding (Extrusion Blow Molding) in which a synthetic resin material is melted by heating and extruded into a tube shape, sandwiched by a mold, and air is blown into the inside to form a hollow article, instead of the biaxially stretch blow molding. / Extrusion blow molding method). As the synthetic resin material, in addition to PET, various materials such as PE (polyethylene) and PP (polypropylene) can be used. The layer structure of the container 1 may be a single layer or a laminated layer.

  The container 1 is provided with a cylindrical mouth portion 2, a shoulder portion 3 connected to the mouth portion 2 and gradually expanding in diameter downward, and a connecting bent portion 4 bent downward in the shoulder portion 3. It has a bottle shape having a continuous body portion 5 and a bottom portion 6 that closes the lower end of the body portion 5. The central axis O of the mouth portion 2 coincides with the central axis lines of the shoulder portion 3, the body portion 5, and the bottom portion 6.

  The container 1 has a capacity of 112 ml, which is suitable for containing a drink such as a drink. However, the container 1 may have a smaller capacity, or vice versa, for example, may have a capacity of 280 ml, 350 ml, or more. The contents are not limited to beverages, and the container 1 can be used to store various contents such as foods, cosmetics and medicines. Note that the contents are not limited to those that are hot-filled.

  A screw portion 2a for screwing a cap (not shown) is provided on the outer peripheral surface of the mouth portion 2. The configuration of the cap is not particularly limited, and the mouth portion 2 may be provided with an engagement protrusion for mounting the cap by tapping, instead of the screw portion 2a.

  The shoulders 3 have the same shape and mutually connect four shoulder main surfaces 3a, which are circumferentially spaced apart from each other and have the same shape, and two adjacent shoulder main surfaces 3a. And four shoulder connecting surfaces 3b, and has a substantially octagonal pyramid shape.

  Each of the four shoulder main surfaces 3a has a curved surface shape in which the vicinity of both circumferential edges is curved downward (except for the portion where the vertical ribs 7 are formed). Each of the four shoulder connecting surfaces 3b has a planar shape. The four main surface 3a of the shoulder portion may have a flat shape or other shapes. In addition, the four shoulder connecting surfaces 3b may have a curved surface shape or other shapes.

  Further, the shoulder 3 (shoulder main surface 3a, shoulder connecting surface 3b) has a longitudinal cross section that is straight or curved (including a concave curve or a convex curve) as long as the diameter gradually increases downward. ) Is okay.

  A connecting bent portion 4 that bends downward from the shoulder portion 3 is formed at the lower end of the shoulder portion 3. The body 5 is connected to the connecting bent portion 4. The body portion 5 interconnects four mutually adjacent panel forming surfaces 5a having the four decompression absorption panels 8 formed therein and two mutually adjacent panel forming surfaces 5a having the same shape. The four connecting surfaces 5b are formed into an octagonal prism shape. Further, the four vertical ribs 7 respectively corresponding to the four reduced pressure absorption panels 8 have the same shape among the four reduced pressure absorption panels 8.

  Each of the four reduced pressure absorption panels 8 has a rectangular shape that is long in the vertical direction. The shape of the reduced-pressure absorption panel 8 is not limited to a rectangular shape, and may be another rectangular shape such as a square, a polygonal shape such as an elliptical shape, a triangular shape, a pentagonal shape, or a teardrop shape. Various shapes can be adopted.

  The outer peripheral edges 8a of the four reduced pressure absorption panels 8 are bent inward from the outer surface thereof to the inside of the container over the entire circumference thereof. However, the outer peripheral edges 8a of the four decompression absorption panels 8 may be bent inward from the outer surface to the inside of the container over substantially the entire circumference thereof.

  The four reduced pressure absorption panels 8 are formed with panel peripheral grooves 8b that are recessed inwardly of the container along the outer peripheral edges 8a. A flat panel central surface 8c is formed inside the panel circumferential groove 8b. At the center of the panel center surface 8c, a panel groove 8d is formed which is straight and extends in the vertical direction and is recessed inward of the container. However, the structure inside the outer peripheral edge 8a of the reduced pressure absorption panel 8 absorbs (reduces) the reduced pressure in the container 1 that occurs when the ambient temperature is lowered or when the contents are filled with high temperature, and the shoulder portion 3 As long as it is possible to suppress the occurrence of permanent deformation such as depression deformation in the other parts, it is possible to appropriately change. It should be noted that the container 1 is not limited to the container for containing the content liquid to be hot filled.

  Here, the container 1 has four vertical ribs 7 extending from each of the four reduced pressure absorption panels 8 toward the shoulder portion 3 and having a groove shape that is recessed inward of the container. Further, the four vertical ribs 7 penetrate the connecting bent portion 4 to reach the shoulder portion 3, respectively. In the first embodiment, four vertical ribs 7 are provided for each of the four reduced pressure absorption panels 8 so as to extend from the central portion in the circumferential direction of the reduced pressure absorption panels 8. Further, in the first embodiment, the four vertical ribs 7 each extend to the upper side portion of the shoulder portion 3.

  The body intermediate portion 5m, which is a portion between the body upper portion 5u which is the upper portion of the body portion 5 and the body lower portion 5l which is the lower portion of the body portion 5, has a panel forming surface 5a portion and a connecting surface 5b portion. In both cases, the diameter is reduced toward the central portion in the vertical direction. On the other hand, the body upper part 5u extends vertically in both the panel forming surface 5a portion (excluding the portion where the vertical ribs 7 and the reduced pressure absorbing panel 8 are provided) and the connecting surface 5b portion. Have the same diameter (planar shape).

  The lower part 5l of the body has the same diameter (planar shape) in the vertical direction in the panel forming surface 5a portion (except the portion where the lateral rib 9 is provided and the vicinity of the lower end). Further, in the connecting surface 5b portion of the lower body portion 5l, the upper portion has the same diameter (planar shape) in the vertical direction, and the lower portion gradually reduces in diameter downward.

  Lateral ribs 9 extending in the radial direction are formed on the panel forming surface 5a portion of the lower body portion 5l. The lateral rib 9 includes a lateral rib circumferential groove 9a formed along the outer peripheral edge of the lateral rib 9 and recessed inwardly of the container, and a planar lateral rib central surface 9b formed inside the lateral rib circumferential groove 9a. ,have.

  As described above, the blow-molded container 1 according to the present embodiment includes the tubular mouth portion 2, the shoulder portion 3 that is continuous with the mouth portion 2 and gradually increases in diameter downward, and the shoulder portion. 3 is a bottle shape having a body portion 5 connected through a connecting bent portion 4 that bends downward, and a bottom portion 6 that closes the lower end of the body portion 5, and has a space in the body portion 5 in the circumferential direction. And a plurality of vertical ribs 7 extending from each of the plurality of reduced pressure absorption panels 8 toward the shoulder 3 and having a groove shape that is recessed inward of the container. The outer peripheral edges 8a of the plurality of reduced pressure absorption panels 8 are bent inward from the outer surface thereof to the inside of the container over substantially the entire circumference thereof, and the plurality of vertical ribs 7 are respectively connected to the connecting bent portions. It is configured to penetrate through 4 and reach shoulder 3.

  Therefore, according to the blow-molded container 1 according to the present embodiment, by providing the vertical rib 7 penetrating from the reduced pressure absorption panel 8 having the reduced pressure absorption function to the shoulder portion 3 in this manner, the permanent deformation of the shoulder portion 3 is prevented. Since it is possible to suppress and absorb the reduced pressure so that the reduced pressure absorbing panel 8 and the shoulder portion 3 are integrated, the reduced pressure absorbing capacity can be advantageously improved. In addition, in the configuration of the blow-molded container 1 according to the present embodiment, since it is possible to utilize the region extending from the reduced pressure absorption panel 8 to the shoulder portion 3 in this manner, it is difficult to secure the area of the reduced pressure absorption panel 8, for example, 200 ml or less. It is especially effective for a small capacity.

  Further, in the blow-molded container 1 according to the present embodiment, the plurality of vertical ribs 7 is provided for each of the plurality of reduced pressure absorption panels 8, and the plurality of vertical ribs 7 are respectively provided for the reduced pressure absorption. It extends from the central portion of the panel 8 in the circumferential direction.

  Therefore, according to the blow-molded container 1 according to the present embodiment, the reduced pressure absorption capacity can be improved with a simple configuration.

  Further, in the blow-molded container 1 according to the present embodiment, since each of the plurality of vertical ribs 7 extends to the upper side portion of the shoulder portion 3, one vertical rib 7 corresponding to one reduced pressure absorption panel 8 is provided. Even in such a case, since the area of the shoulder portion 3 capable of absorbing the reduced pressure in cooperation with the reduced pressure absorption panel 8 can be advantageously secured, the reduced pressure absorption capacity can be effectively improved.

  Further, in the blow-molded container 1 according to the present embodiment, since each of the plurality of reduced pressure absorption panels 8 has a rectangular shape, the area of the reduced pressure absorption panels 8 can be advantageously ensured, and the reduced pressure absorption panels 8 and Since the vertical ribs 7 can cooperate with each other in an advantageous manner, the reduced pressure absorption capacity can be effectively improved.

  Further, in the blow-molded container 1 according to the present embodiment, the body portion 5 includes a plurality of panel forming surfaces 5a having the same shape and a plurality of decompression absorption panels 8 formed one by one, and two panels adjacent to each other. The plurality of vertical ribs 7 respectively corresponding to the plurality of pressure reducing absorption panels 8 have a plurality of vertical ribs 7 and have a plurality of connecting surfaces 5b having the same shape and interconnecting the forming surfaces 5a. The absorbent panels 8 have the same shape.

  Therefore, according to the blow-molded container 1 according to the present embodiment, it is possible to advantageously secure the area of the portion that bears the reduced pressure absorption function and effectively improve the reduced pressure absorption capacity.

  Further, in the blow-molded container 1 according to the present embodiment, the body portion 5 has an octagonal columnar shape composed of four panel forming surfaces 5a and four connecting surfaces 5b, so that the reduced pressure absorption is particularly effective. The capacity can be improved.

  Next, with reference to FIGS. 4 to 5, a blow molding container 1A according to a second embodiment of the present invention will be described as an example.

  Compared to the container 1 of the first embodiment described above, the container 1A of the present embodiment is different in the configuration of the vertical rib 7A, and that the decompression absorption panel 8 and the horizontal rib 9 are connected by an auxiliary rib 10. The configurations are different in and, but they are the same in other points.

  That is, the container 1A has eight vertical ribs 7A. A pair of eight vertical ribs 7A is provided for each of the four reduced pressure absorption panels 8 so as to extend from both ends in the circumferential direction of the reduced pressure absorption panels 8. The eight vertical ribs 7A extend from each of the four reduced pressure absorption panels 8 toward the shoulder portion 3 and have a groove shape that is recessed inward of the container. Further, each of the eight vertical ribs 7A penetrates the connecting bent portion 4 and reaches the shoulder portion 3.

  Further, the container 1A has eight auxiliary ribs 10 that interconnect the four reduced pressure absorption panels 8 and the four lateral ribs 9. Two auxiliary ribs 10 are provided for each of the four reduced pressure absorption panels 8. The eight auxiliary ribs 10 extend in the vertical direction, respectively, in the vicinity of both circumferential end portions of the four decompression absorption panels 8, and in the vicinity of both circumferential end portions of the four horizontal ribs 9, respectively. Are interconnected.

  In this way, by providing the auxiliary ribs 10 interconnecting the reduced pressure absorption panel 8 having the reduced pressure absorption function and the lateral ribs 9, permanent deformation of the lower body part 5l is suppressed, and the reduced pressure absorption panel 8 to the lower body part 5l are extended. Since it is possible to absorb the reduced pressure so as to be integrated, the reduced pressure absorption capacity can be advantageously improved.

  As described above, in the blow-molded container 1A according to the present embodiment, the plurality of vertical ribs 7A penetrating the shoulder portion 3 from the plurality of reduced pressure absorption panels 8 having the reduced pressure absorption function are provided in each of the plurality of reduced pressure absorption panels 8. On the other hand, a pair is provided so as to extend from both ends in the circumferential direction of the reduced pressure absorption panel 8.

  Therefore, according to the blow-molded container 1A of the present embodiment, as in the case of the first embodiment, the permanent deformation of the shoulder portion 3 is suppressed, and the reduced pressure absorption panel 8 and the shoulder portion 3 are integrated so that the reduced pressure is absorbed. Therefore, the reduced-pressure absorption capacity can be advantageously improved.

  Next, with reference to FIGS. 6 to 7, a blow molding container 1B according to a third embodiment of the present invention will be described as an example.

  Compared with the container 1A of the second embodiment described above, the container 1B of the present embodiment is different in configuration in that eight vertical ribs 7B extend to the upper portion of the shoulder portion 3, respectively. The other configurations are the same.

  According to the blow-molded container 1B of the present embodiment, the reduced pressure absorption capacity can be advantageously improved, as in the case of the second embodiment.

  Next, with reference to FIG. 8, a blow molding container 1C according to a fourth embodiment of the present invention will be described as an example.

  Compared with the container 1A of the above-described second embodiment, the container 1C of the present embodiment has eight vertical ribs 7C whose upper ends are surrounded by a convex portion 11 or a concave portion 12 formed in the shoulder portion 3, respectively. The configuration is different in that it exists, but is the same in other points. In the case shown in the drawing, the upper ends of the vertical ribs 7C located on the right side of the reduced pressure absorption panels 8 are surrounded by the convex portion 11 that is convex outside the container, and are located on the left side of the reduced pressure absorption panels 8. The upper end of the vertical rib 7C is surrounded by the recess 12 that is recessed inward of the container.

  According to the blow-molded container 1C of the present embodiment, the reduced pressure absorption capacity can be advantageously improved, as in the case of the second embodiment.

  The above description merely shows one embodiment of the present invention, and it goes without saying that various modifications may be made in the claims. For example, the shoulders and the body of the container have a substantially octagonal cross section, but various modifications such as other polygons, circles, ellipses, and the like are possible. Further, in the second to fourth embodiments, the plurality of vertical ribs are provided in pairs for each of the plurality of reduced pressure absorption panels so as to extend from both ends in the circumferential direction of the reduced pressure absorption panel. The position where the vertical ribs are provided is not limited to both ends in the circumferential direction of the reduced pressure absorption panel, and may be any position symmetrical with respect to the central portion in the circumferential direction of the reduced pressure absorption panel. Further, the number is not limited to one pair, and at least two (even number or odd number) can be provided.

  As examples of the present invention, the container shown in FIGS. 1 to 3 (Example 1), the container shown in FIGS. 4 to 5 (Example 2), and the container shown in FIGS. 6 to 7 (Example 3). ), The container (Example 4) shown in FIG. 8 was manufactured. Further, as a comparative example, the container shown in FIG. 9 was manufactured.

  As shown in FIG. 9, compared with the container 1 shown in FIGS. 1 to 3, the container 100 of the comparative example does not have the vertical ribs 7, and the decompression absorption panel 80 is provided in the middle part 5 m of the body part. The structure is different in that it is arranged so as to fit in, the structure inside the outer peripheral edge 80a of the decompression absorption panel 80 is different, and the lateral rib 9 is also formed in the upper part 5u of the body part. However, the other configurations are the same.

  Each of the containers of Examples 1 to 4 and Comparative Example was formed by biaxial stretch blow molding using a PET material, and had a volume of 112 ml. Then, for each empty container, the inside of the container was depressurized, and the depressurized absorption capacity until the wall surface of the container was permanently deformed was measured. The reduced pressure absorption capacity measured in each example is an average value of the values measured by manufacturing a plurality of containers having the same structure.

  As a result, the reduced pressure absorption capacity was 6.0 ml in the comparative example, whereas it was 6.5 ml in Example 1, 7.3 ml in Example 2, 6.7 ml in Example 3, and 7 in Example 4. It was 0.0 ml.

  From the above results, it was confirmed that the reduced pressure absorption capacity can be improved by providing the vertical ribs that penetrate the reduced pressure absorption panel to the shoulder portion.

1, 1A, 1B, 1C, 100 Blow molding container 2 Mouth portion 2a Screw portion 3 Shoulder portion 3a Shoulder main surface 3b Shoulder connecting surface 4 Connecting bent portion 5 Body portion 5a Panel forming surface 5b Connecting surface 5u Upper body portion 5l Lower part of body part 5m Middle part of body part 6 Bottom part 7, 7A, 7B, 7C Vertical ribs 8, 80 Decompression absorption panels 8a, 80a Outer peripheral edge 8b Panel peripheral groove 8c Panel central surface 8d Panel concave groove 9 Horizontal rib 9a Horizontal rib peripheral groove 9b lateral rib central surface 10 auxiliary rib 11 convex 12 concave O

Claims (7)

A tubular mouth portion, a shoulder portion connected to the mouth portion and gradually expanding in diameter downward, a body portion connected to the shoulder portion via a connecting bent portion that bends downward, and a body portion of the body portion A bottle-shaped blow-molded container having a bottom portion closing the lower end,
A plurality of reduced pressure absorption panels arranged at intervals in the body in the circumferential direction,
A plurality of vertical ribs extending from each of the plurality of reduced pressure absorption panels toward the shoulder portion and having a groove shape that is recessed inward of the container,
The outer peripheral edges of the plurality of reduced-pressure absorption panels are respectively bent over substantially the entire circumference from the outer surface to the inside of the container,
Each of the plurality of vertical ribs penetrates the connecting bent portion to reach the shoulder portion ,
At least two vertical ribs are provided for each of the plurality of reduced pressure absorption panels so as to extend from a position symmetrical with respect to the circumferential center of the reduced pressure absorption panel. Molded container. Wherein the plurality of longitudinal ribs, for each of said plurality of vacuum panels, said to extend from circumferential ends of the vacuum panels, are a pair arranged, blow-molded container of claim 1. The blow-molded container according to claim 1 or 2 , wherein each of the plurality of vertical ribs extends to an upper portion of the shoulder portion. Wherein the plurality of vacuum panels, respectively, has a rectangular shape, the blow molded container according to any one of claims 1-3. Wherein the plurality of the upper and lower ends of the vertical ribs, respectively, said surrounded by the formed projections or recesses in the shoulders, blow-molded container according to any one of claims 1-4. The body portion has a plurality of panel forming surfaces having the same shape, in which the plurality of reduced pressure absorbing panels are formed one by one, and two panel forming surfaces that are adjacent to each other. It has a polygonal column consisting of multiple connecting surfaces,
Wherein the plurality of longitudinal ribs respectively corresponding to the plurality of vacuum panels are in mutual of the plurality of vacuum panels, and the same shape, blow molding according to any one of claims 1 to 5 container. The blow-molded container according to claim 6 , wherein the body portion is in the shape of an octagonal prism including four panel forming surfaces and four connecting surfaces.

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