JP6403823B2 - Resin container - Google Patents

Description

  The present invention includes a body portion having a substantially rectangular cross-sectional shape, and is elastically deformable in the up-down direction having a groove that is wider toward the outer side in the radial direction below the center in the up-down direction of the body portion. The present invention relates to a resin container provided with a cushion portion.

As a conventional resin container, for example, a plastic bottle having a configuration shown in Patent Document 1 is known. Here, even when a load is applied to the PET bottle from above and below, a constriction and a rib that can absorb the load by elastic deformation and prevent buckling of the PET bottle are disclosed. Has been.
On the other hand, in the market, resin containers of various shapes have been developed due to customer preference, etc., and in general, a cylindrical container having a circular cross section and a square having a substantially square cross section. Divided into columnar containers.

JP 2008-13180 A

  However, in the case of a conventional resin container having a substantially square body having a cross-sectional shape, even if ribs are formed, the cross-sectional shape of the ribs is substantially similar to that of the container, i.e., substantially rectangular, When a load is applied from above and below, stress may concentrate on the corners and the ribs may be deformed or broken, leaving room for improvement.

  An object of the present invention is to prevent deformation or breakage of a cushion portion capable of absorbing a load applied from above and below in a resin container including a body portion having a substantially rectangular cross section.

The first characteristic configuration of the resin container according to the present invention is provided with a body portion having a substantially square cross-sectional shape, and a groove that becomes wider outward in the radial direction below the center in the vertical direction of the body portion. Ri Oh and vertical direction an elastic deformable cushion portion having over, the groove, in cross-sectional shape, and a circular arc portion that protrudes outwardly formed in the corner portions, that is composed of a straight portion It is in.

[Action and effect]
As in this configuration, by forming the arc portion at the corner of the cross-sectional shape of the groove of the cushion portion, stress concentration in the groove of the cushion portion hardly occurs during elastic deformation, and there is no possibility that the groove is deformed or damaged. . Therefore, even if a load is applied from the up and down direction, the cushion portion can be elastically deformed to absorb the load more reliably.

  The second characteristic configuration is that arc portions are formed at each of the four corners in the cross-sectional shape of the groove.

[Action and effect]
As in this configuration, by forming arc portions at each of the four corners of the cross-sectional shape of the groove of the cushion portion, stress concentration in the groove of the cushion portion during elastic deformation is further less likely to occur.

  The third characteristic configuration is that each of the four arc portions has the same radius of curvature and arc length.

[Action and effect]
As in this configuration, since each of the four arc portions has the same radius of curvature and arc length, the cross-sectional shape of the groove of the cushion portion becomes closer to a circle, and stress in the groove of the cushion portion during elastic deformation Concentration is even less likely to occur.

  A fourth characteristic configuration is that, in the cushion portion, small recesses shallower than the groove are formed one by one above and below the groove over the entire circumference of the body portion.

[Action and effect]
According to this configuration, the cushion portion can be effectively functioned when a load is applied from the vertical direction.

  The fifth characteristic configuration is that the center of the circle of the arc portion is at the center of the cross section of the body portion including the arc portion.

[Action and effect]
According to this structure, the circle | round | yen of the circular arc part which is a groove | channel of a cushion part can be brought closer to a perfect circle, and a load can be absorbed more efficiently.

  A sixth characteristic configuration is that the cross-sectional shape is substantially rectangular.

[Action and effect]
In particular, in the case of a substantially rectangular shape having a long side and a short side in the cross-sectional shape, a cushion part that can handle a load in the vertical direction only by forming a substantially rectangular rib substantially similar to the cross-sectional shape in the resin container. It will not be. By forming the arc portion in a resin container having a rectangular cross-sectional shape, a greater load absorption effect is achieved.

1 is a perspective view of a resin container according to the present invention. It is a front view of the resin-made containers according to the present invention. It is a side view of the resin container according to the present invention. FIG. 4 is a longitudinal sectional view taken along line IV-IV in FIG. 2. FIG. 5 is a cross-sectional view taken along line VV in FIG. 2. It is an enlarged view of the recessed part vicinity of the resin-made containers concerning this invention. It is a cross-sectional view of the arrow VII-VII line in FIG. It is a cross-sectional view of the arrow VIII-VIII in FIG. It is a bottom view of the bottom part of the resin-made containers which concern on this invention.

Hereinafter, as a preferred embodiment of a resin container according to the present invention, a plastic bottle filled with a liquid such as a beverage will be described with reference to the drawings.
Embodiment
First, various terms used in this specification are defined as follows.
In the present specification, the “vertical direction” means the direction of the central axis XX of the plastic bottle 1 (hereinafter, abbreviated as the bottle 1) in FIG. In particular, in FIGS. 1 to 3, upper refers to the upper end side of the drawing, and lower refers to the lower end side of the drawing.
The “lateral direction” or “horizontal direction” means a direction orthogonal to the central axis XX direction. The circumferential direction means a direction along the contour of the cross-sectional shape.
The “radial direction” means the radial direction of a circle when an arbitrary point on the central axis XX is considered as the center of the circle.
“Height” or “width” means a length along the direction of the central axis XX.
“Depth” means the length along the radial direction.
The “cross-sectional shape” means a cross-sectional shape of the bottle 1 in a plane (cross section) orthogonal to the central axis XX.

  As shown in FIG. 1 to FIG. 4, the bottle 1 according to this embodiment includes, in order from the top, a mouth part 2 with a cap detachable, a shoulder part 3 connected to the mouth part 2, and a shoulder part 3. It is configured to include a trunk portion 4 that is continuously provided, and a bottom portion 37 that is continuous with the trunk portion 4 and is located at the lowermost portion, and a space for storing beverages and the like is formed inside.

  The bottle 1 can be manufactured by a known molding method such as a biaxial stretch blow molding method using, for example, a thermoplastic resin such as polyethylene, polypropylene, or polyethylene terephthalate as a main material.

  The bottle 1 is filled with liquids such as beverages such as drinking water, tea, fruit juice, coffee, cocoa, soft drinks, alcoholic beverages, milk beverages, soup, and liquid seasonings such as sauces and soy sauce. be able to. Further, the inner volume of the bottle 1 is not particularly limited. Depending on the type of liquid to be filled, the bottle 1 has a relatively small volume of several milliliters to hundreds of milliliters, and is relatively small of several liters. Although it may set arbitrarily until it reaches a large capacity, for example, a beverage bottle having an internal volume of 1 liter to 2 liters is suitable.

(Mouth)
As shown in FIGS. 1 to 4, the mouth portion 2 is a portion constituted by a cylinder whose upper end is open, and functions as a spout for beverages and the like. A male screw portion 2a is formed on the outer peripheral surface of the mouth portion 2, and a cap (not shown) is detachably screwed and fixed.

(Shoulder)
The shoulder portion 3 is a portion that is gradually enlarged from the lower end of the mouth portion 2 to the upper end of the body portion 4 and is configured in a substantially square pyramid shape that is rounded as a whole.

(Torso)
The trunk portion 4 includes a straight barrel portion 5, a constricted portion 11, and a cushion portion 27 in order from above.

  As shown in FIG. 7, the trunk | drum 4 in this embodiment has the substantially rectangular cross-sectional shape which was rounded as a whole. In the cross-sectional shape of the body 4, each of the two long sides 35 is opposed to the front and back sides of the bottle 1, and each of the two short sides 36 is on the right side and left side of the bottle 1. Are arranged opposite to each other. Then, the long side 35 and the short side 36 are connected via four arc-shaped corners.

(Straight body part)
As shown in FIGS. 1-4, the straight body part 5 is a substantially rectangular parallelepiped part rounded as a whole, and the label which displays brands, contents, etc., such as a drink, is provided in the outer peripheral surface. Can do. The straight body 5 is provided with a plurality of first grooves 6 at equal intervals in the vertical direction, and convex portions 9 are formed between the adjacent first grooves 6. The first groove 6 and the convex portion 9 are provided over the entire circumference of the straight body portion 5 and have a function as a reinforcing rib that reinforces the side strength of the bottle 1.

  As shown in FIG. 5, in the first groove 6, protrusions 7 that protrude inward of the straight body part 5 and non-protrusion parts 8 are alternately formed in the circumferential direction. For this reason, the depth of the first groove 6 is not constant over the entire circumference of the straight body portion 5, and varies in an undulating manner.

  The projecting portion 7 includes a first projecting portion 7a projecting inwardly in a mountain shape, and a second projecting portion 7b having a projecting degree smaller than that of the first projecting portion 7a. The 1st protrusion part 7a is provided in the center part of each horizontal direction of the front surface of the straight body part 5, a back surface, a right side surface, and a left side surface. The 2nd protrusion part 7b is provided in a row by the left-right both sides of the 1st protrusion part 7a. Adjacent second projecting portions 7 b are connected to each other via a non-projecting portion 8. The non-projecting portions 8 are provided at the four corners in the cross-sectional shape of the straight body portion 5.

  The first projecting portion 7a, the second projecting portion 7b, and the non-projecting portion 8 have a center line Y-Y passing through the center in the lateral direction of the front and back surfaces of the straight body portion 5 as a symmetrical axis, or the straight body portion. The center line ZZ that passes through the center of each of the right side surface and the left side surface of the left side surface 5 is symmetrically arranged.

  Moreover, in the convex part 9 of the straight body part 5, a depression that falls into the inside of the straight body part 5 with a gentle inclination is formed in each of the lateral center portions of the front surface, the back surface, the right side surface, and the left side surface of the straight body part 5 10 is formed. These depressions 10 are provided at the same position as the first protrusions 7a of the first groove 6 in the vertical direction.

[Constriction]
As shown in FIG. 1 to FIG. 4, the constricted part 11 is a part that is narrower and smaller in diameter than the other part of the body part 4 so that the consumer can easily grasp the bottle 1.

  The constricted part 11 is provided in the vicinity of the central part in the vertical direction of the body part 4. As shown in FIG. 4, the constricted portion 11 is formed with a recessed portion 12 that largely falls in a substantially rectangular shape on the inside and the back surface of the constricted portion 11. Each of the two recesses 12 is provided at the center in the lateral direction of each of the front surface and the back surface of the constricted portion 11 and is disposed so as to face each other. For this reason, when the consumer holds the bottle 1 with one hand, the bottle 1 can be reliably held by placing the thumb against one of the recesses 12 and the middle finger (or index finger) against the other recess 12. .

  As shown in FIG. 6, the recess 12 includes a bottom surface 13, an upper inclined surface 14 provided continuously with the upper side of the bottom surface 13, a lower inclined surface 15 provided continuously with the lower side of the bottom surface 13, and the bottom surface 13. A right inclined surface 16 provided continuously with the right side and a left inclined surface 17 provided continuously with the left side of the bottom surface 13 are provided.

  The upper inclined surface 14 and the lower inclined surface 15 are inclined so as to be closer to each other toward the bottom surface 13 side, and the right inclined surface 16 and the left inclined surface 17 are inclined so as to be closer to each other toward the bottom surface 13 side.

  The gradient of the right inclined surface 16 is substantially the same as the gradient of the left inclined surface 17, but the gradient of the lower inclined surface 15 is set to be gentler than the gradient of the upper inclined surface 14.

  The recess 12 is provided with a longitudinal groove 18 extending from the bottom surface 13 to the lower inclined surface 15. Further, a lateral groove 19 extending in the lateral direction is provided on the bottom surface 13 of the recess 12.

A right vertical mountain portion 20 and a left vertical mountain portion 21 extending in the vertical direction are provided on the right side and the left side of the concave portion 12, respectively. Migitateyama portion 20 is continuously provided on the right side inclined surface 16 of the recess 12, the left Tateyama portion 21 continuously provided on the left side inclined surface 17 of the recess 12. The right vertical mountain portion 20 and the left vertical mountain portion 21 are arranged in parallel.

  Two circumferential grooves 22 arranged in the vertical direction from the right vertical mountain portion 20 and the left vertical mountain portion 21 of the front concave portion 12 to the left vertical mountain portion 21 and the right vertical mountain portion 20 of the rear concave portion 12. Is provided. The circumferential grooves 22 have the same depth and are constant throughout. As shown in FIG. 1, in the present embodiment, the vertical position of the lateral groove 19 of the recess 12 is located between the two circumferential grooves 22.

  A gently inclined upper wavy inclined surface 25 is connected to the upper inclined surface 14 of the recess 12, and a gently inclined lower wavy inclined surface 26 is connected to the lower inclined surface 15 of the recessed portion 12. Each of the upper wavy inclined surface 25 and the lower wavy inclined surface 26 is inclined so as to be closer to each other toward the bottom surface 13 side of the recess 12. The upper wavy inclined surface 25 forms a wavy curved surface over the entire circumference of the constricted portion 11. The lower side wavy inclined surface 26 has a wavy curved surface (see FIG. 2) on the front side and the rear side of the bottle 1 in which the concave portion 12 is formed. 3).

  In addition, about the upper side wavy inclined surface 25 and the lower side wavy inclined surface 26, the front surface and back surface of the bottle 1 in which the recessed part 12 was formed should just be a wavy inclined surface. For example, the side surface may be a straight slope, or a wavy curve may be formed over the entire circumference. By using a wavy curve, the stress can be more dispersed, so that deformation of the container can be suppressed even when a load is applied to the container.

[Cushion part]
As shown in FIGS. 1 to 4, the cushion portion 27 is provided below the center of the body portion 4 in the vertical direction. The cushion portion 27 includes three grooves extending over the entire circumference, the V-shaped recess portion 28 having a V-shaped longitudinal section that is wider toward the outer side in the radial direction, and two small recess portions provided above and below the V-shaped recess portion 28. 29, 29, and has a line-symmetric configuration with the V-shaped recess 28 as an axis of symmetry.

  As shown in FIG. 8, arc portions 32 are formed at each of the four corners in the cross-sectional shape of the V-shaped recess 28. In the cross-sectional shape of the V-shaped recess 28 in the present embodiment, each of the two long sides 30 is disposed opposite to the front and back sides of the bottle 1, and each of the two short sides 31 is the bottle 1. Oppositely arranged on the right side and left side. The long side portion 30 and the short side portion 31 are connected to each other via four arc portions 32. Each of the four arc portions 32 has the same radius of curvature and arc length. The center of the circle of the arc portion 32 is the center of the cross-sectional shape of the bottle 1 including the arc portion 32.

  In the present embodiment, the arc portions 32 are formed at each of the four corners in the cross-sectional shape of the V-shaped recess 28, but the arc portion 32 is provided at at least one of these four corners. It only has to be formed.

  Although not shown, the cross-sectional shape of the V-shaped recess 28 is not limited to the above shape, and the two short side portions 31 may not be provided. In this case, the two arc portions 32 arranged on the right side are connected to each other, and the two arc portions 32 arranged on the left side are connected to each other. It looks like a track on an athletic stadium.

As shown in FIG. 4, the cushion portion 27 has a three-stage spring structure by having three grooves of a V-shaped concave portion 28 and two small concave portions 29 and 29, thereby elastically deforming in the vertical direction. Can do. Therefore, even if a load is applied to the bottle 1 from above and below, the cushion portion 27 can be elastically deformed to absorb the load, and the bottle 1 can be prevented from buckling. Furthermore, by forming the arc portions 32 at each of the four corners in the cross-sectional shape of the V-shaped recess 28, stress concentration in the V-shaped recess 28 is difficult to occur during elastic deformation, and the V-shaped recess 28 is deformed or damaged. There is no fear of doing it. Therefore, even if a load is applied to the bottle 1 from above and below, the cushion portion 27 can be elastically deformed to absorb the load more reliably.

  In addition, although the cushion part 27 in this embodiment is provided with three grooves, the V-shaped recessed part 28 and the two small recessed parts 29 and 29, as a groove over the perimeter, it is not limited to this structure, For example, a configuration in which only one or more V-shaped recesses 28 are provided, a configuration in which one or more small recesses 29 are provided above and below the V-shaped recess 28, or a plurality of V-shaped recesses 28 and one or more small recesses 29 or the like.

(bottom)
As shown in FIGS. 1 to 4, the bottom portion 37 includes a peripheral wall 38 and a bottom wall 39.
The peripheral wall 38 is a portion that rises upward from the periphery of the bottom wall 39 having a substantially rectangular shape that is rounded as a whole. The bottom wall 39 has a contact portion 40 arranged at the edge thereof, a raised portion 41 that gently rises from the inner edge of the contact portion 40 toward the center of the bottom wall 39, and an upper portion formed at the center portion of the raised portion 41. And a circular recess 42 protruding from the top. When the bottle 1 is placed on a flat desk or the like, the contact portion 40 contacts the desk or the like.

  As shown in FIG. 9, vertical recesses 43, which are grooves extending from the recess 42 of the bottom wall 39 to the peripheral wall 38, are provided at eight locations radially at equal intervals from the recess 42 of the bottom wall 39. The vertical recess 43 functions as a reinforcing rib that reinforces the strength of the bottom portion 37. Further, the vertical recess 43 has a function of guiding the cleaning liquid so that the cleaning liquid spreads over the entire bottom portion 37 through the vertical recess 43 when the inside of the bottle 1 is cleaned after the bottle 1 is molded. The performance is improved.

As shown in FIGS. 1 to 4, in the bottle 1 of the present embodiment, a first wavy circumferential groove 44 is provided in the body part 4 between the constricted part 11 and the cushion part 27, and the cushion part 27, the bottom part 37, A second wavy circumferential groove 45 is provided in the body portion 4 between the two. A lower peripheral groove 46 is provided at the lower end of the trunk portion 4 (near the boundary between the trunk portion 4 and the bottom portion 37).
The first wavy circumferential groove 44 and the second wavy circumferential groove 45 are configured by alternately arranging an upper curved portion 47 and a lower curved portion 48 over the entire circumference of the body portion 4 so as to meander in a wavy shape in a side view. It is a groove with a constant depth. In the present embodiment, the first wavy circumferential groove 44 and the second wavy circumferential groove 45 are arranged out of phase with each other in the circumferential direction, and at the position where the upper curved portion 47 of the first wavy circumferential groove 44 is arranged. A lower curved portion 48 of the second wavy circumferential groove 45 is disposed. The lower circumferential groove 46 is a groove having a constant depth provided over the entire circumference of the body portion 4. These first wavy circumferential groove 44, second wavy circumferential groove 45, and lower circumferential groove 46 all have a function as a reinforcing rib that reinforces the side strength of the bottle 1.

  The resin container of the present invention is not limited to non-carbonated beverages such as water, green tea, oolong tea, and fruit juice, but can also be used as a container for filling foods such as carbonated beverages and sauces.

DESCRIPTION OF SYMBOLS 1 Bottle 2 Mouth part 2a Male thread part 3 Shoulder part 4 Body part 5 Straight body part 6 1st groove | channel 7 Protrusion part 7a 1st protrusion part 7b 2nd protrusion part 8 Non-protrusion part 9 Protrusion part 10 Depression 11 Constriction part 12 Concave part 13 Bottom surface 14 Upper inclined surface 15 Lower inclined surface 16 Right inclined surface 17 Left inclined surface 18 Vertical groove 19 Horizontal groove 20 Right vertical mountain portion 21 Left vertical mountain portion 22 Circumferential groove 25 Upper wavy inclined surface 26 Lower wavy inclined surface 27 Cushion Part 28 V-shaped recess (groove)
29 small concave portion 30 long side portion 31 short side portion 32 arc portion 35 long side 36 short side 37 bottom portion 38 peripheral wall 39 bottom wall 40 contact portion 41 raised portion 42 dent 43 vertical concave portion 44 first wavy circumferential groove 45 second wavy circumferential groove 46 Lower circumferential groove 47 Upper curved portion 48 Lower curved portion

Claims (6)

A cushion part capable of elastically deforming in the vertical direction is provided, which has a body part having a substantially rectangular cross-sectional shape, and has a groove that extends from the center in the up-down direction of the body part to the outer side in the radial direction, and has a groove that extends wider on the entire circumference. Thea is,
A resin container in which the groove has a circular arc portion formed at a corner and protruding outward and a straight portion in a cross-sectional shape.   The resin container according to claim 1, wherein arc portions are formed in each of the four corners in the cross-sectional shape of the groove.   The resin container according to claim 2, wherein each of the four arc portions has the same radius of curvature and arc length.   The resin container according to any one of claims 1 to 3, wherein in the cushion portion, small concave portions shallower than the groove are formed one by one above and below the groove over the entire circumference of the body portion. .   The resin container according to any one of claims 1 to 4, wherein a center of a circle of the arc portion is at a center of a cross section of the trunk portion including the arc portion.   The resin container according to any one of claims 1 to 5, wherein the cross-sectional shape is a substantially rectangular shape.

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