JP5637787B2 - Thin bottle container - Google Patents

Description

  The present invention relates to a thin bottle container, and particularly relates to a synthetic resin thin bottle container in which a main body of the container includes a pair of first panel surfaces and a pair of second panel surfaces.

In recent years, for example, synthetic resin bottle containers that contain various liquids such as detergents and foods as their contents have been designed to reduce the environmental burden, and thin-walled bottle containers with a reduced amount of resin used. Have been developed (see, for example, Patent Document 1). In view of CO ₂ emission, various thin bottle containers using polypropylene or polyethylene have been developed instead of polyethylene terephthalate and vinyl chloride, which are generally used as synthetic resins constituting thin bottle containers.

  On the other hand, thin bottle containers using polypropylene or polyethylene have low shape retention rigidity. For example, oxygen absorption in the air remaining inside the container due to the filled liquid, temperature difference between filling and use of the liquid, etc. Therefore, if the inside of the inside is reduced in pressure, the appearance is liable to be damaged by deformation due to the influence of this.

  For this reason, thin-walled bottles are provided with a panel for absorbing deformation, or by controlling the relationship between the radius of curvature of the container body and the wall thickness, so that the appearance is not impaired by the reduced pressure inside the container. Various containers have also been developed (see, for example, Patent Document 2 and Patent Document 3). Moreover, shape retention rigidity is also improved by providing the trunk | drum of a thin-walled bottle container by providing a concave groove and a convex rib (for example, patent document 4).

JP 11-348960 A JP 2001-100419 A JP 2003-226316 A Japanese Patent No. 3819207

  In the conventional thin-walled bottle container, the device has been devised so as not to impair the appearance or to improve the shape retention rigidity of the trunk, but the shape retention rigidity may not be sufficient depending on the usage form of the container. . For example, when a thin-walled bottle container is used as a refill container filled with a refill liquid, for example, when the cap attached to the mouth part is opened while the body part of the container is held, the sealed interior When the pressure is released and the gripped body is more easily deformed, it is compressed and deformed by the gripping force, and the volume is reduced, so that the liquid filled from the upper end outlet of the mouth is inadvertently overflowed. There is.

  The present invention provides a thin bottle container that can prevent deformation due to internal decompression so that the appearance is not impaired, and can effectively suppress deformation due to gripping force when gripping the trunk. The purpose is to provide.

  In the present invention, the main body of the container includes a pair of first panel surfaces facing each other and a pair of second panel surfaces facing each other sandwiched between side edges of the pair of first panel surfaces. Each of the pair of first panel surfaces forms a single curved convex surface that is convexly curved outwardly of the container, and is smoothly connected to the pair of second panels. Each of the surfaces achieves the above object by providing a thin-walled bottle container that is convexly curved inside the container and forms a single curved concave surface that is smoothly continuous.

  According to the thin bottle container of the present invention, the deformation due to the internal decompression can be made inconspicuous so that the appearance is not impaired, and the deformation due to the force of gripping the body portion can be effectively suppressed.

It is a perspective view of the thin bottle container which concerns on preferable one Embodiment of this invention. (A) of the thin bottle container which concerns on preferable one Embodiment of this invention is a front view, (b) is a side view, (c) is a top view, (d) is a bottom view. It is a perspective view which illustrates other desirable forms of a thin bottle container. The other preferable form of a thin bottle container is illustrated, (a) is a perspective view, (b) Front view, (c) is a side view. It is a perspective view of the thin bottle container of the comparative example 1. It is explanatory drawing of the analysis result by FEM.

  A thin-walled bottle container 10 according to a preferred embodiment of the present invention shown in FIG. 1 is used as a refill container in which, for example, a refill liquid detergent is filled and accommodated. In the thin bottle container 10 of the present embodiment, the temperature difference between the filling of the liquid and the display after the liquid is sealed and commercialized, and the surfactant contained in the liquid detergent remains in the container 10. When the inside of the sealed container 10 is depressurized, for example, by absorbing oxygen in the air, it effectively absorbs the deformation caused by the depressurization of the inside so that the appearance is not impaired. It has a function. Further, the thin bottle container 10 of the embodiment effectively suppresses deformation of the container by an external force such as a gripping force when the container 10 is gripped, for example, while holding the container 10, When a cap (not shown) that seals the container 10 is opened, the container is compressed and deformed to reduce the volume, and the liquid filled from the upper end outlet 26a of the mouth portion 26 does not inadvertently overflow. It has a function to do so.

  That is, as shown in FIGS. 2A to 2D, the thin-walled bottle container 10 of the present embodiment includes a pair of first panel surfaces 16 and a pair of first panel surfaces 16 facing each other. A pair of opposing second panel surfaces 17 disposed between the side edge portions 16a of the one panel surface 16, and made of a synthetic resin that is used by gripping the pair of first panel surfaces 16 from both sides. Each of the pair of first panel surfaces 16 is a bottle container, and each of the pair of first panel surfaces 16 forms a curved convex surface 18 that is convexly curved outwardly of the container 10 and is smoothly continuous. Forms a curved concave surface 19 that is convexly curved inside the container 10 and smoothly continues. The main body 11 of the container 10 is not easily deformed by the curved convex surface 18 of the first panel surface 16 and the curved concave surface 19 of the second panel surface 17.

  In the present embodiment, the first panel surface 16 is a front panel surface, and the second panel surface is a side panel surface.

Furthermore, in this embodiment, the thin bottle container 10 is preferably made of, for example, polypropylene or polyethylene (high density polyethylene, low density polyethylene) as a synthetic resin that emits less CO ₂ than polyethylene terephthalate or vinyl chloride. Used, for example, by direct blow molding or stretch blow molding. Further, the thin bottle container 10 has a resin amount of the synthetic resin of preferably 2.0 to 5.0 g / 100 ml with respect to the inner volume of the container, and is formed into a thin wall, for example, about 200 to 800 cc. It has a capacity of

  In the present embodiment, the thin-walled bottle container 10 includes a main body part 11 and a mouth part 26, and the main body part 11 includes a shoulder part 12 from which the mouth part 26 protrudes, a bottom part 14 that forms a self-supporting placement part 13, and It is comprised by the trunk | drum 15 between these. Here, the shoulder portion 12 of the main body portion 11 is a portion that expands from the base end portion of the mouth neck portion 26 toward the lower end and expands toward the bottom, and when viewed in an outwardly convex region, the base portion of the mouth neck portion 26. It can be set as the part of the height area | region of 30% of the height of the main-body part 11 from an edge part.

  The bottom part 14 of the main body part 11 is a part that expands and expands upward from the part constituting the placement part on the placement surface, and is 30% higher than the height of the main body part 11 from the placement part. It can be a part of the area. Moreover, it can also be divided into a shoulder part, a trunk | drum, and a bottom part on the boundary where the change point of the inclination of a convex surface is large. (If there are multiple change points, the boundary near the center can be divided.)

  In the present embodiment, the shoulder portion 12 of the thin-walled bottle container 10 is a portion having a dome shape that constitutes the upper end portion of the main body portion 11 continuously above the trunk portion 15 and is perpendicular to the central axis direction of the container 10. The transverse shape is elliptical or substantially elliptical. The shoulder portion 12 is integrally provided with a cylindrical mouth portion 26 that protrudes upward from the central portion of the upper end of the shoulder portion 12. A sealing cap (not shown) is detachably attached to the mouth part 26 via a male threaded ridge (not shown) formed on the outer peripheral surface.

  Further, the shoulder portion 12 has a dome shape by smoothly and continuously expanding an elliptical shape or a substantially elliptical transverse shape downward from the joint base end portion 26b of the neck portion 26 to the shoulder portion 12. A curved outer peripheral surface having a shape is formed. In the present embodiment, the shoulder portion 12 has an upper portion sandwiching the label adhering boundary guide line 20 provided on a pair of front and back front portions of the container 10 as the shoulder portion 12, and a trunk portion 15 of the lower portion thereof. It is continuous.

  In the present embodiment, an elliptical or substantially elliptical transverse shape at the lower end of the shoulder 12 along the label sticking boundary guide line 20 that is a boundary portion with the body 15 is formed on a side panel surface 17 described later. In an imaginary transverse shape (see the dotted line in FIG. 2 (d)) before both side ends are cut away by the biting portion, the ratio R1 / R2 between the maximum curvature radius R2 and the minimum curvature radius R1 is 1/4. The following is preferable. The ratio R1 / R2 between the maximum radius of curvature R2 and the minimum radius of curvature R1 is ¼ or less, so that it is possible to suppress dents in the front panel when the front panel is strongly gripped. become.

  The bottom part 14 of the thin-walled bottle container 10 is a part which comprises the lower end part of a container continuously below the trunk | drum 15, and in this embodiment, as shown in FIG.2 (d), the elliptical shape of the shoulder part 12 is shown. Alternatively, it has an elliptical or substantially elliptical transverse shape that is substantially similar to the substantially elliptical transverse shape. In addition, the bottom portion 14a of the bottom portion 14 is depressed at the center portion as a depressed portion 14b, and a pair of elliptical annular ribs 21 arranged concentrically on the outer circumferential annular band portion of the depressed portion 14b are provided below. By being provided so as to protrude, the self-supporting placement portion 13 is formed. When the thin bottle container 10 is placed on a placement surface such as a display shelf, the self-standing placement portion 13 on the bottom surface 14a can be made to stand in a stable state.

  Moreover, in this embodiment, as shown in FIG.1 and FIG.2 (a), the bottom part 14 is provided with the level | step-difference edge line 22 provided in the front-and-back paired front part of the container 10. As shown in FIG. The step ridge line 22 has a depth h (for example, about 0.5 to 2.0 mm so that the front portion of the bottom portion 14 is disposed outside the front panel surface 16 of the body portion 15 that also functions as a label attachment surface. This is provided to form the step in FIG. 2 (b). By arranging the front portion of the bottom portion 14 as an offset surface outside the front panel surface 16 of the trunk portion 15 via the step ridge line 22, for example, when packaging the containers 10, the plurality of containers 10 are in close contact with each other. When arranged, the offset surfaces are brought into contact with each other and the label mounting surfaces are not brought into contact with each other, so that it is possible to effectively avoid the adhered labels from being rubbed and damaged.

  Furthermore, in the present embodiment, the central portion disposed on the outermost side of the portion along the step ridge line 22 of the bottom portion 14 has a flat contact chamfered flat along a surface perpendicular or substantially perpendicular to the bottom surface 14a. A contact surface 23 is provided. By providing the flat contact surface 23 at the outermost portion of the front portion of the bottom portion 14, for example, the flat of the adjacent container 10 on the container production line, on the filling line, or at the time of packing. By bringing the contact surfaces 23 into contact with each other, it is possible to effectively avoid disturbance of the state in which the containers 10 are rotated and aligned.

  Furthermore, in the present embodiment, the step ridge line 22 extends downward in a U shape that is convex downward when viewed from the front and back pair of front and back sides of the container 10, and the curved convex surface of the front panel surface 16 of the trunk portion 15 described later. 18 is curved in the transverse direction of the container 10 to be curved and extended into a three-dimensional shape that is not in a single two-dimensional plane. Since the step ridge line 22 is curved and extended in a three-dimensional shape, it is possible to effectively avoid the container 10 from being easily deformed at the step ridge line 22 portion.

  And in this embodiment, as shown to FIG.1 and FIG.2 (a), (b), the trunk | drum 15 of the thin bottle container 10 is a pair of front panel surface 16 which opposes, and these pair of front panels. A pair of opposing side panel surfaces 17 disposed between the side edge portions 16a of the surface 16 are arranged.

  The pair of front panel surfaces 16 are divided into upper and lower portions by a label sticking boundary guide line 20 and a step ridge line 22 in the front portion of the thin bottle container 10 shown in FIG. It is a part pinched | interposed between the bottom parts 14 of. The front panel surface 16 has a substantially vertical rectangular front shape in which the lower side is curved along the step ridge line 22 and the side sides on both sides are curved along the curved shape of the curved concave surface 19 of the pair of side panel surfaces 17. Prepare.

  Further, the front panel surface 16 is convexly curved outwardly of the container 10 to form a single curved convex surface 18 that is smoothly continuous. In the present embodiment, the curved convex surface 18 is formed on the front panel surface 16. It is a quadratic curved surface that curves outwardly only in the cross section in the width direction. Since the curved convex surface 18 of the front panel surface 16 is a quadratic curved surface, it is possible to easily attach a label by attaching or attaching the front panel surface 16 as a label attachment surface. . A label can be attached using various things, such as a tack label, a wound label, and a shrink label, and a label made of plastic or paper can be used.

  Further, the curved convex surface 18 of the front panel surface 16 has a curvature radius in a transverse cross section in the width direction substantially the same as the curvature radius of the front portion at the lower end portion of the shoulder portion 12 along the label sticking boundary guide line 20, for example, 20. The curved surface is ˜60 mm, preferably 30 to 45 mm, particularly preferably 35 to 45 mm.

  Here, if the radius of curvature of the curved convex surface 18 is too large, there will be a problem that the liquid will inadvertently overflow when the cap is opened while it is gripped. This causes a problem that it is difficult to secure the area. Moreover, it becomes possible to aim at coexistence with becoming difficult to deform | transform and ensuring the area which sticks a label enough by setting the curvature radius of the curved convex surface 18 to 30-50 mm.

As shown in FIGS. 1 and 2B, the pair of side panel surfaces 17 are sandwiched between the side edge portions 16 a on both sides of the front and back pair of front panel surfaces 16 in the side surface portion of the thin bottle container 10. Provided. The side panel surface 17 has a flat, vertically long, substantially oval shape, and the side edge portions 17a on both sides thereof are connected to the side edge portion 16a of the front panel surface 16 via connection ridge lines 24, respectively. Further, the U-shaped edge portion 17b of the upper end portion of the side panel surface 17 is disposed so as to cut into the shoulder portion 12 from the trunk portion 15 beyond the label sticking boundary guide line 20, and the lower end of the side panel surface 17 The U-shaped edge portion 17 c of the portion is disposed so as to cut into the bottom portion 14 from the trunk portion 15 beyond the step ridge line 22. Accordingly, the side panel surface 17 is provided so as to cut into the shoulder portion 12 and the bottom portion 14 from the trunk portion 15. By providing the side panel surface 17 so as to cut into the shoulder portion 12 and the bottom portion 14 from the trunk portion 15, there is an effect of preventing the corner portions of the shoulder portion 12 and the bottom portion 14 from becoming thin and easily deformed ( It is possible to prevent thinning during blow molding.)

  Further, the side panel surface 17 is convexly curved inside the container 10 to form a single curved concave surface 19 that is smoothly continuous. In the present embodiment, the curved concave surface 19 is formed on the side panel surface 17. Only in the longitudinal section in the height direction, for example, it is a secondary curved surface that curves inwardly with a radius of curvature of 700 to 1100 mm. In addition, this curved concave surface 19 can also be a secondary curved surface that curves inwardly with a radius of curvature of 150 to 300 mm, for example, only in the transverse cross section of the side panel surface 17. The side panel surface 17 may be a cubic curved surface that curves inwardly in both the vertical cross section in the height direction and the horizontal cross section in the width direction. By making the side panel surface 17 a cubic curved surface, the side panel surface 17 can effectively exhibit the function of absorbing deformation due to internal decompression and the function of suppressing deformation due to external load. become.

  Further, in the present embodiment, the upper end portion of the portion that bites into the shoulder portion 12 and the lower end portion of the portion that bites into the bottom portion 14 that are arranged on the outermost side of the side panel surface 17 are in relation to the bottom surface 14a of the bottom portion 14. A flat abutting surface 25 is provided that is chamfered flat along a vertical or substantially vertical surface. Since the flat contact surface 25 is provided in the outermost portion of the side surface portion of the container 10, the adjacent container is similar to the flat contact surface 23 provided in the front portion of the bottom portion 14 described above. By bringing the 10 flat contact surfaces 25 into contact with each other, it is possible to effectively prevent the container 10 from being rotated and aligned.

  And according to the thin-walled bottle container 10 of the present embodiment having the above-mentioned configuration, the deformation due to the internal pressure reduction can be made inconspicuous so that the appearance is not impaired, and the deformation due to the force that grips the body portion 15 Can be effectively suppressed.

  That is, according to the present embodiment, the body portion 15 of the container 10 includes a pair of opposed front panel surfaces 16 and a pair of opposed side panel surfaces 17 disposed between the side edge portions 16a. Each of the pair of front panel surfaces 16 forms a single curved convex surface 18 that is convexly curved outwardly of the container 10 and smoothly continues. A curved concave surface 19 that is convexly curved inwardly and smoothly continues is formed. Accordingly, the curved concave surfaces 19 that are convexly curved inwardly of the pair of side panel surfaces 17 have a shape that is easily curved inward by receiving the force drawn inwardly. The container is sealed by the temperature difference from the display after the product is sealed and commercialized, or the surfactant contained in the liquid detergent absorbs oxygen in the air remaining in the container 10. When the inside of 10 is decompressed, the deformation due to such decompression is positively absorbed by the deformation of the side panel surface 17, thereby deforming the front panel surface 16 constituting the front portion of a large area. It is possible to prevent the appearance from being easily impaired.

  Moreover, according to this embodiment, the trunk | drum 15 of the container 10 is provided with the flat cross-sectional shape which consists of a pair of front panel surface 16 and a pair of side panel surface 17, Therefore A user is a pair. The front panel surface 16 is guided from both sides and used. The pair of front panel surfaces 16 form a curved convex surface 18 that curves outwardly, thereby effectively resisting the gripping force from the outside so as not to deform flatly. The side panel surface 17 is formed with a curved concave surface 19 that curves inwardly, so that the pressure applied from the inside is loaded through the internal liquid detergent by the gripping force on the front panel surface 16. On the other hand, it resists effectively so as not to be deformed flat. Accordingly, the container 10 is made of a porous material by efficiently exhibiting the shape retaining rigidity of the body portion 15 by the synergistic effect of the resistance force to the gripping force by the front panel surface 16 and the resistance force to the gripping force by the side panel surface 17. Even if it is formed using propylene or polyethylene, it is possible to effectively suppress deformation due to the force of gripping the body portion 15.

The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, thin-walled bottle containers can be formed using petroleum-derived polypropylene and polyethylene as well as biomass plastics (polypropylene, polyethylene), etc., as well as polyethylene terephthalate, vinyl chloride, etc., as synthetic resins with low CO ₂ emissions It can also be formed. The liquid stored in the thin-walled bottle container may be other various liquids such as food, cosmetics, and medicines in addition to the liquid detergent. Furthermore, the curved convex surface formed by the front panel surface may be a curved convex surface that curves in a convex shape in the longitudinal section in the height direction and / or the transverse section in the width direction. Furthermore, as shown in FIG. 3, the step ridge line 30 can be provided at the connection portion between the shoulder portion 12 and the trunk portion 15. It can also be set as the thin bottle container of a shape as shown to Fig.4 (a)-(c). The shape retention rigidity can be improved by appropriately providing the concave grooves and the convex ribs for reinforcement. The convex rib can be provided on the shoulder, bottom, front panel (first panel surface), side panel (second panel surface), flat contact surface, and the like.

  The present invention can also be applied to a case where the cross section of the main body is other than a tetrahedron, such as a polyhedron.

  Hereinafter, although the thin bottle container of the present invention will be described in more detail with reference to Examples and Comparative Examples, the present invention is not limited to these.

[Example 1, Comparative Example 1]
A thin bottle container having the same configuration as that of the above embodiment was used as the thin bottle container of Example 1. The thin bottle container shown in FIG. 5 that does not have a curved convex surface or a curved concave surface on the front panel surface or the side panel surface was used as the thin bottle container of Comparative Example 1. Regarding the thin bottle container of Example 1 and the thin bottle container of Comparative Example 1, the relationship between the amount of resin and the maximum displacement when gripped was analyzed by the following FEM analysis. The analysis results are shown in FIG.

〔analysis method〕
Using the commercially available FEM analysis program “SolidWorks” (manufactured by Dassault Systèmes Solidworks), a three-dimensional model of the thin bottle container of Example 1 and the thin bottle container of Comparative Example 1 was created. In "SolidWorks Simulation", the analysis was performed by pushing the body of the container with a stick (substituting fingers) with a predetermined load. The rod was restricted from moving back and forth and was only movable in the support direction. In addition, the three-dimensional model gave a constraint condition that is half-symmetrical.

  According to the analysis result shown in FIG. 6, it is found that the thin bottle container of Example 1 according to the present invention can effectively suppress the deformation when gripped.

DESCRIPTION OF SYMBOLS 10 Thin bottle container 11 Main-body part 12 Shoulder part 13 Self-supporting mounting part 14 Bottom part 14a Bottom face 15 Trunk part 16 Front panel surface (1st panel surface)
16a Side edge part 17 Side panel surface (2nd panel surface)
17a Side edge portions 17b, 17c U-shaped edge portion 18 Curved convex surface 19 Curved concave surface 20 Label sticking boundary guide line 21 Elliptical annular rib 22 Step ridge line 23, 25 Flat contact surface 24, 30 Connection ridge line 26 Mouth part

Claims (9)

The thin bottle in which the main body of the container includes a pair of opposing first panel surfaces and a pair of opposing second panel surfaces disposed between side edges of the pair of first panel surfaces. A container,
Each of the pair of first panel surfaces forms a single curved convex surface that is convexly curved outwardly of the container and smoothly continues, and each of the pair of second panel surfaces is formed inside the container. It forms a single curved concave surface that curves smoothly and continues smoothly .
The main body is composed of a shoulder, a trunk, and a bottom,
The bottom portion is disposed outside the first panel surface of the trunk portion via a step ridge;
An upper end portion of the curved concave surface of the second panel surface is disposed so as to cut into the shoulder portion from the trunk portion, and a lower end portion of the curved concave surface of the second panel surface exceeds the step ridge line. A thin-walled bottle container that is arranged to bite into the bottom from the trunk .   2. The thin bottle container according to claim 1, wherein the curved concave surface formed by the second panel surface is a curved concave surface curved in a concave shape in a vertical cross section in the height direction and / or in a horizontal cross section in the width direction. The thin bottle container according to claim 1 or 2, wherein the curved convex surface formed by the first panel surface is a curved convex surface curved in a convex shape in a longitudinal section in the height direction and / or in a transverse section in the width direction. The thin bottle container according to any one of claims 1 to 3 , wherein the synthetic resin constituting the container is polypropylene, polyethylene, or polyethylene terephthalate. The thin bottle container according to any one of claims 1 to 4 , wherein a resin amount of the synthetic resin is 2.0 to 5.0 g / 100 ml with respect to an inner volume of the container. The thin bottle container according to any one of claims 1 to 5 , wherein the curved convex surface formed by the first panel surface is a curved surface having a curvature radius of 30 to 45 mm in a transverse cross section in the width direction. The thin bottle container according to claim 1 , wherein the curved convex surface formed by the first panel surface is a quadratic curved surface. The thin bottle container according to any one of claims 1 to 7, wherein the step ridge line is curved and extended in a three-dimensional shape. The thin bottle container according to any one of claims 1 to 8, wherein the first panel surface is a front panel surface and the second panel surface is a side panel surface.