JP6060595B2 - Plastic bottle containers - Google Patents

Description

  The present invention includes a mouth for injecting or taking out the contents from which the cap is removable, a shoulder formed below the mouth and on the top of the container, and a center of the container below the shoulder and below the shoulder In relation to a plastic bottle container provided with a body part formed at the bottom and a bottom part formed below the body part and at the bottom of the container, more specifically, considering the ease of carrying and ease of drinking by the user, manufacturing The present invention relates to a plastic bottle container that secures a rigid structure with no problem during transportation or in vending machines.

In general, plastic bottles made of polyester, polypropylene, nylon and the like typified by PET are known, and are widely marketed in a state filled with beverages.
In recent years, it has been desired to reduce the weight of plastic bottles by reducing the amount of plastic materials used for plastic bottles from the viewpoint of reducing dust and maintaining a good natural environment. However, when the plastic bottle is reduced in weight, the strength of the bottle is weakened. Since plastic bottles are transported to a store or vending machine in a state where a plurality of plastic bottles packed in cardboard etc. are stacked on a pallet, etc., it does not have sufficient buckling strength, There is a risk of buckling deformation due to vertical load. In addition, inside the vending machine, the plastic bottles are laid sideways and loaded, so that the plastic bottles on the lower level are liable to be crushed on the sides, and there is a risk that normal dispensing from the vending machine may not be possible. is there.

  Therefore, as shown in Patent Document 1, a plug portion, a support ring, a shoulder portion, a trunk portion, and a bottom portion are provided, and the trunk portion is composed of four flat wall portions and a corner portion connecting the flat wall portions, and the flat wall portion. And a plastic bottle having an annular circumferential groove that crosses the corner portion, and the flat wall portion is divided into an upper flat wall portion and a lower flat wall portion by the circumferential groove, the longitudinal groove is in the region of the corner portion close to the circumferential groove. Some of them have increased rigidity against vertical and lateral loads.

JP 2009-078844 A

  However, it is desirable to consider the ease of carrying and drinking of the user, and to further increase the rigidity. Accordingly, the present invention provides a plastic bottle container that can be easily carried and consumed by the user, and can secure rigidity with a simple structure at the time of manufacture, transportation, and in a vending machine. .

For this reason, the invention according to claim 1 is provided with a mouth portion for injecting or taking out the contents in which the cap is detachable, a shoulder portion formed below the mouth portion and at the top of the container, and the shoulder portion. A plastic bottle container having a body portion formed in a central portion of the container and a bottom portion formed in the lower portion of the container and in the lower portion of the container, wherein the shoulder portion is an upper shoulder connected to the mouth portion. And a lower shoulder continuous with the body, the body having a substantially rectangular tube shape having four side surfaces, a constricted portion of an annular circumferential groove, and an upward direction from the constricted portion. An upper body portion that extends to the lower shoulder portion and a lower body portion that extends downward from the constricted portion and continues to the bottom portion, and the upper shoulder portion is substantially V-shaped. Before the adjoining vertical ribs that are recessed inwardly and extended vertically Has the upper shoulder triangular convex destination becomes narrower downward from the upper end of the between the longitudinal ribs to each other, the lower shoulder has a transverse rib recessed inwardly, the said upper body portion The lower body portion is characterized by having a panel portion that is recessed inward in multiple stages.

  According to a second aspect of the present invention, in the plastic bottle container according to the first aspect, the distance W1 between the two opposing side surfaces of the upper end portion of the upper body portion is equal to 2 opposite to the lower end portion of the lower body portion. It is the same as the distance W2 between two side surfaces, and the upper end portion of the upper body portion and the lower end portion of the lower body portion have a maximum width in the circumferential direction.

According to a third aspect of the present invention, in the plastic bottle container of the first or second aspect, the ratio (L1 / L2) of the height L1 from the ground contact surface of the bottom portion to the constricted portion with respect to the total height L2 of the plastic bottle container. ) Is 0.2 or more and 0.5 or less.

According to a fourth aspect of the present invention, in the plastic bottle container according to any one of the first to third aspects, the lower end portion of the lower body portion has a distance W3 between two opposing side surfaces of the constricted portion. The ratio (W3 / W2) of the two opposing side surfaces to the distance W2 is 0.80 or more and 0.95 or less.

According to the first aspect of the present invention, a mouth part for injecting or taking out the contents to which the cap is detachable, a shoulder part formed below the mouth part and in the upper part of the container, and the shoulder part In a plastic bottle container having a barrel part formed at the lower center of the container and a bottom part formed at the lower part of the container and below the trunk part, the shoulder part is an upper shoulder part connected to the mouth part. And a lower shoulder portion continuous with the body portion, the body portion having a substantially rectangular tube shape having four side surfaces, a constricted portion of an annular circumferential groove, and upward from the constricted portion An upper body portion that expands and continues to the lower shoulder portion , and a lower body portion that extends downward from the constricted portion and continues to the bottom portion, the upper shoulder portion being substantially V-shaped. A vertical rib extending inward and extending vertically, and the adjacent vertical rib Has the upper shoulder upper triangular convex destination becomes narrower downward from the between the blanking between said lower shoulder portion includes a transverse rib recessed inwardly, the lower and the upper body portion Since the side barrel portion has a panel portion that is recessed inwardly in multiple stages, the barrel portion of the plastic bottle container can be easily grasped, and is easy to carry and drink. In addition, the plastic bottle container has high rigidity in the vertical direction and the horizontal direction, and can prevent deformation of the container in a process provided to the user from manufacturing such as manufacturing, transportation, or dispensing from a vending machine. In addition, a part of the load applied to the plastic bottle container is absorbed by the deformation of the panel due to the pressure change inside the plastic bottle container, and the wall of the plastic bottle container is pressed inward when the plastic bottle container is opened. Thus, the liquid content can be prevented from being pushed out and spilled from the mouth portion by deforming the panel portion. Furthermore, the releasability from the mold of the plastic bottle container at the time of molding is improved, and the production efficiency is improved.
Moreover, while improving the rigidity of a shoulder part, the beauty | look of a bottle can be improved with the said vertical rib and a triangular convex surface.

  According to the invention described in claim 2, the distance W1 between the two opposing side surfaces of the upper end portion of the upper body portion is the same as the distance W2 between the two opposite side surfaces of the lower end portion of the lower body portion. In addition, since the upper end portion of the upper body portion and the lower end portion of the lower body portion have the maximum width in the circumferential direction, when the plastic bottle container is laid sideways, the upper end portion of the upper body portion and the lower body portion The lower end portion serves as a ground contact portion, and the plastic bottle container can be stably laid down horizontally without tilting. Therefore, the plastic bottle container can be loaded in a lying state, and can be used for a vending machine or the like that stores the plastic bottle container in a lying state.

According to invention of Claim 3 , ratio (L1 / L2) with respect to the total height L2 of the plastic bottle container of the height L1 from the ground-contact surface of the said bottom part to the said constriction part is 0.2 or more and 0.5 Since it is the following, it becomes easy to hold | grip the trunk | drum of a plastic bottle container, and it becomes easy to carry and it becomes easy to drink.

According to the fourth aspect of the present invention, the ratio (W3 / W2) of the distance W3 between the two opposing side surfaces of the constricted portion to the distance W2 between the two opposing side surfaces of the lower end portion of the lower body portion is set. , 0.
Since it is 80 or more and 0.95 or less, it becomes easy to hold | grip the trunk | drum of a plastic bottle container, it becomes easy to carry and it becomes easy to drink.

It is a front view of a plastic bottle container showing an example of the present invention. It is a top view of the plastic bottle container in FIG. It is a bottom view of the plastic bottle container in FIG. It is an A arrow side view of the plastic bottle container in FIG. It is a BB sectional view of the plastic bottle container in FIG. It is CC sectional view taken on the line of the plastic bottle container in FIG. It is the DD sectional view taken on the line of the plastic bottle container in FIG.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. 1 is a front view of a plastic bottle container, FIG. 2 is a plan view of the plastic bottle container in FIG. 1, FIG. 3 is a bottom view of the plastic bottle container in FIG. 1, and FIG. FIG. 5 is a sectional view taken along line B-B of the plastic bottle container in FIG. 1, FIG. 6 is a sectional view taken along line C-C of the plastic bottle container in FIG. 1, and FIG. It is the DD sectional view taken on the line of a bottle container. In the present specification, “upper” and “lower” refer to the upper and lower sides of the plastic bottle container 1 in an upright state (FIG. 1), respectively.

  As shown in FIGS. 1 to 4, the plastic bottle container 1 of the present invention is formed in the upper part of the container below the mouth part 10 and the mouth part 10 for injecting or taking out the contents whose cap is removable. A shoulder portion 20, a trunk portion 30 formed below the shoulder portion 20 and in the center of the container, and a bottom portion 40 formed below the trunk portion 30 and at the bottom of the container are provided.

  The shoulder portion 20 includes an upper shoulder portion 21 that is continuous with the mouth portion 10 and a lower shoulder portion 22 that is continuous with the trunk portion 30. The upper shoulder portion 21 has four side surfaces 23 having the same shape, and has a substantially quadrangular pyramid shape that expands downward. Further, chamfered portions 24 are formed between the adjacent side surfaces 23. The chamfered portion 24 is provided with a dent extending in the vertical direction and having a substantially V-shaped cross section recessed inwardly, and a triangular convex surface with a tapering downward from the upper end of the upper shoulder. By forming such a triangular strong truss structure on the upper shoulder, the rigidity of the shoulder can be increased and the rigidity of the plastic bottle container can be increased. The chamfered portion 24 is preferably provided with this recess or a triangular convex surface, but may be a flat surface or a surface curved outward. The lower shoulder portion 22 has four side surfaces 25 having the same shape, and has a substantially rectangular tube shape that expands downward. Further, a chamfered portion 26 that is a flat surface is formed between the adjacent side surfaces 25. The chamfered portion 26 may be a surface curved outward and is not particularly limited.

  The trunk | drum 30 has the four side surfaces 31 which become the mutually same shape, and consists of a substantially square cylinder shape as a whole. Further, a chamfered portion 32 that is a flat surface is formed between the adjacent side surfaces 31. In addition, the chamfered part 32 may be a surface curved outward and is not particularly limited. Moreover, the trunk | drum 30 is not limited to square cylinder shape, What is necessary is just a polyhedral cylinder shape, and if it is an even-numbered polyhedral cylinder shape, it is more preferable.

  The body portion 30 includes an annular circumferential groove constriction portion 50 located at the upper and lower intermediate portions, and gradually expands upward from the constriction portion 50 and continues to the lower shoulder portion 22. The lower body portion 34 is gradually expanded downward from the constricted portion 50 and continues to the bottom portion 40. That is, the trunk | drum 30 becomes a shape where the upper-lower intermediate part was restrict | squeezed compared with the other site | part. By adopting such a configuration, it becomes easy to grip the trunk 30. Further, since the body portion 30 is formed in a substantially square tube shape, when the body portion 30 is gripped and the cap is opened and closed by, for example, a screw type, the hand gripping the body portion 30 is difficult to slip, and the plastic bottle It is possible to prevent the container 1 from idling and to easily open and close the cap.

  The bottom part 40 is located at the lower part of the plastic bottle container 1 and continues to the lower body part 34. A corner portion 41 that protrudes outward is formed between the adjacent bottom portion 40 and the lower body portion 33. Further, the bottom surface of the bottom portion 40 is recessed inward to give the plastic bottle container 1 strength.

  The constricted portion 50 includes a constricted portion bottom surface 51, an upper tapered portion 52 that extends from the upper edge of the constricted portion bottom surface 51 to the upper body portion 33, and a lower side that continues from the lower edge of the constricted portion bottom surface 51 to the lower body portion 34. The taper part 53 is comprised. The upper tapered portion 52 is inclined upward, and the lower tapered portion 53 is inclined downward. Part of the buckling load is absorbed by the above-mentioned annular circumferential groove constriction 50, and deformation of the plastic bottle container can be prevented.

  Panel portions 35 a and 35 b that are recessed inward of the body portion 30 are formed on the side surface 31 a of the upper body portion 33 and the side surface 31 b of the lower body portion 34, respectively. The panel portion 35a has a substantially square shape when viewed from the front.

  As shown in FIG. 5, the panel portion 35a has a panel bottom surface 36a, a panel side surface 37a surrounding the panel bottom surface 36a, a panel intermediate surface 38 surrounding the panel side surface 37a, and a panel side surface 39a surrounding the panel intermediate surface 38. doing. Further, the panel side surfaces 37a and 39a are inclined toward the inside of the panel bottom surface 36a, and the panel bottom surface 36a and the panel intermediate surface 38 are substantially parallel. That is, the panel portion 35 a is recessed in two steps toward the inside of the trunk portion 30.

  As shown in FIG. 6, the panel part 35b has a panel bottom surface 36b, a panel side surface 37b surrounding the panel bottom surface 36b, and a panel side surface 39b surrounding the panel side surface 37b. The panel side surfaces 37b and 39b are inclined toward the inside of the panel bottom surface 36b. That is, the panel portion 35 b is recessed in two steps toward the inside of the trunk portion 30.

  The panel portions 35a and 35b only need to be recessed in multiple stages toward the inside of the body portion 30. For example, the panel portion 35a may not have the panel intermediate surface 38, and the panel portion 35b You may provide the surface similar to the panel intermediate surface 38 which the panel part 35a has. If the indentation of the body part 30 of the panel parts 35a and 35b is multistage, the releasability from the mold of the plastic bottle container 1 at the time of molding will be improved, and the manufacturing efficiency will be improved. Further, the shape of the panel portions 35a and 35b in a front view is not limited to a substantially square shape, and may be a shape such as a circle, an ellipse, or a polygon.

  Moreover, although the indentation depth to the inward of the trunk | drum 30 of the panel parts 35a and 35b is not limited, 3.0 mm-6.0 mm are preferable. If the dent depth is small, it becomes impossible to absorb a load due to a change in the internal pressure of the plastic bottle container 1 to be described later. If the dent depth is large, whitening due to poor shaping or overstretching occurs when the plastic bottle container 1 is molded. End up. In addition, the dent depth of panel part 35a, 35b is the maximum distance d1, d2 from each side surface 31a, 31b to each panel bottom face 36a, 36b.

  The panel parts 35a and 35b can absorb the increased pressure inside the plastic bottle container 1. When the internal pressure increases, the panel portions 35 a and 35 b are pressed outward of the plastic bottle container 1. When the pressure of the container decreases, the panel portions 35a and 35b are pressed inward of the plastic bottle container 1. Therefore, the panel portions 35a and 35b can absorb a part of the load due to the change in internal pressure applied to the plastic bottle container 1 by the deformation of the panel portions 35a and 35b. Moreover, since the panel parts 35a and 35b are dented in two steps, it is possible to more effectively absorb part of the load due to changes in internal pressure. Further, when the plastic bottle container 1 is opened, the panel portions 35a and 35b are prevented from being deformed by the wall of the plastic bottle container 1 being pressed inward and the liquid contents being pushed out and spilled from the mouth. Can do. Moreover, the rigidity of the trunk | drum 30 can be improved.

  Further, on the side surface 23 of the upper shoulder portion 21, as shown in FIG. 7, between the vertical ribs 60 that are recessed inward in a substantially V shape and extended in the vertical direction, and the adjacent vertical ribs 60. A plurality of triangular convex surfaces 62 whose tips are tapered downward from the upper end of the upper shoulder portion are provided. By forming such a triangular strong truss structure in the upper shoulder portion 21, the upper shoulder portion 21 is formed. The rigidity of can be increased. In addition, the vertical ribs 60 and the triangular convex surfaces 62 can enhance the aesthetics of the bottle, and are excellent in design. Note that the length of the triangular convex surface 62 in the vertical direction does not need to be uniform, and the length may be different depending on the angle in the circumferential direction as shown in FIGS. Further, since the lateral rib 61 is provided on the side surface 25 of the lower shoulder portion 22 so as to be recessed inward and extended in the horizontal direction, the rigidity of the lower shoulder portion 22 can be increased.

  When the distance between the two opposite side surfaces 31a of the upper end portion of the upper body portion 33 is W1, and the distance between the two opposite side surfaces 31b of the lower end portion of the lower body portion 34 is W2, the distance W1 and the distance W2 are The same. Moreover, the upper end part of the upper trunk | drum 33 and the lower end part of the lower trunk | drum 34 have the largest width | variety with respect to the circumferential direction. That is, when the plastic bottle container 1 is laid sideways, the upper end portion of the upper body portion 33 and the lower end portion of the lower body portion 34 serve as a ground contact portion, and the plastic bottle container 1 can be stably laid down horizontally without tilting. Can do. Therefore, the plastic bottle container 1 can be loaded in a laid state.

  When the height from the ground contact surface of the bottom 40 to the constricted portion 50 is L1, and the total height of the plastic bottle container 1 is L2, the ratio of the height L1 to the constricted portion 50 to the total height L2 of the plastic bottle container 1 ( L1 / L2) is preferably not less than 0.2 and not more than 0.5, so that the body 30 of the plastic bottle container 1 is easy to grip, easy to carry and easy to drink.

  The distance (W3 / W2) of the distance W3 between the two constricted portion bottom surfaces 51 of the constricted portion 50 is W3, and the distance W3 is equal to the distance W2 of the two opposite side surfaces 31b of the lower end portion of the lower body portion 34. It is preferable that it is 0.80 or more and 0.95 or less, and it becomes easy to hold | grip the trunk | drum 30 of the plastic bottle container 1, and it becomes easy to carry and it becomes easy to drink.

  The size of the plastic bottle container 1 is not limited, and may be made of any size bottle. For example, the volume of the plastic bottle container 1 may be 450 ml to 550 ml. In particular, the total height L2 of the plastic bottle container 1 is 200 mm to 210 mm, and the distance W1 between the two opposing side surfaces 31a at the upper end portion of the upper trunk portion 33 or the two opposing side surfaces 31b at the lower end portion of the lower trunk portion 34 is. The distance W2 is preferably 55 mm to 65 mm, and the effects of the present invention can be suitably obtained.

  As a material of the plastic bottle container 1, a thermoplastic resin can be used, for example, a thermoplastic polyester such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, or a copolymer thereof. Resins or blends with other resins are suitable, and ethylene terephthalate-based thermoplastic polyesters such as polyethylene terephthalate can be suitably used. Moreover, an acrylonitrile resin, a polypropylene, a propylene-ethylene copolymer, etc. can also be used. Various additives such as a colorant, an ultraviolet absorber, a release agent, a lubricant, a nucleating agent, an antioxidant, an antistatic agent and the like are blended with the above-described resin within a range that does not impair the quality of the molded product. be able to.

  Further, as the ethylene terephthalate thermoplastic resin, the ethylene terephthalate unit occupies most of the ester repeating portion, generally 70 mol% or more, and has a glass transition point (Tg) of 50 to 90 ° C. and a melting point (Tm). Is preferably in the range of 200 to 275 ° C. In addition, as an ethylene terephthalate-based thermoplastic polyester, polyethylene terephthalate is particularly excellent in terms of pressure resistance, but in addition to the ethylene terephthalate unit, an ester composed of a dibasic acid such as isophthalic acid or naphthalenedicarboxylic acid and a diol such as propylene glycol. Copolyesters containing a small amount of units can also be used.

  Moreover, the plastic bottle container 1 can also be comprised by two or more layers of thermoplastic polyester layers. Furthermore, when the plastic bottle container 1 is composed of two or more thermoplastic polyester layers, an intermediate layer such as a barrier layer or an oxygen absorbing layer can be provided between the layers. As the oxygen absorbing layer, a combination of an oxidizable organic component and a transition metal catalyst, or a layer containing a gas barrier resin that does not substantially oxidize can be used.

  The plastic bottle container 1 can be produced by molding a preform produced by injection molding of the above-described material by various molding methods such as blow molding, injection blow molding, and stretch blow molding.

  As described in detail above, the plastic bottle container 1 of the present invention includes a mouth portion 10 for injecting or taking out contents whose cap is removable, and a shoulder portion formed below the mouth portion 10 and at the top of the container. 20, a plastic bottle container comprising a barrel 30 formed below the shoulder 20 and in the middle of the container, and a bottom 40 formed below the barrel 30 and below the container, the shoulder 20 is The upper shoulder portion 21 is connected to the 10 mouth portion, and the lower shoulder portion 22 is connected to the trunk portion 30. The trunk portion 30 has a substantially rectangular tube shape having four side surfaces, and a constriction of an annular circumferential groove. The upper body portion 33 that extends upward from the constricted portion 50 and extends to the lower shoulder portion 22, and the lower body portion 34 that extends downward from the constricted portion 50 and continues to the bottom portion 40. The lower shoulder 22 is a side that is recessed inward. It has a Bed 61, the upper body portion 33 and a lower body portion 34, the panel portion 35a concaved in the multi-step inwardly, and has a 35b.

  The plastic bottle container of the present invention contains, for example, foods containing seasonings such as various non-carbonated beverages such as tea, oolong tea, tea, coffee and fruit juice, carbonated beverages, natural sparkling water, or sauces and mirin. It is useful for all containers that are housed, and can be loaded on its side, so it is also suitable for sales by vending machines.

DESCRIPTION OF SYMBOLS 1 Plastic bottle container 10 Mouth part 20 Shoulder part 21 Upper shoulder part 22 Lower shoulder part 30 trunk part 33 Upper trunk part 34 Lower trunk part 35a, 35b Panel part 40 Bottom part 50 Constriction part 60 Vertical rib 61 Horizontal rib 62 Triangle convex surface

Claims (4)

A mouth for injecting or removing the contents from which the cap is removable;
A shoulder formed below the mouth and above the container;
A trunk formed below the shoulder and at the center of the container;
In a plastic bottle container having a bottom part formed below the trunk part and at the bottom of the container,
The shoulder portion includes an upper shoulder portion continuous with the mouth portion, and a lower shoulder portion continuous with the trunk portion,
The trunk portion has a substantially rectangular tube shape having four side surfaces,
A constriction of an annular circumferential groove;
An upper trunk portion that expands upward from the constricted portion and continues to the lower shoulder;
Expanding from the constricted portion downward, and comprising a lower body portion continuous with the bottom portion,
The upper shoulder is tapered in a downward direction from the upper end of the upper shoulder between the vertical ribs that are recessed inward in a substantially V shape and extended in the vertical direction, and the adjacent vertical ribs. And has a triangular convex surface
The lower shoulder has lateral ribs recessed inwardly;
The plastic bottle container, wherein the upper body part and the lower body part have a panel part that is recessed inward in multiple stages.   The distance W1 between the two opposite side surfaces of the upper end of the upper body is the same as the distance W2 between the two opposite sides of the lower end of the lower body, and the upper end of the upper body and the The plastic bottle container according to claim 1, wherein a lower end portion of the lower body portion has a maximum width in a circumferential direction. The ratio (L1 / L2) of the height L1 from the ground contact surface of the bottom portion to the overall height L2 of the plastic bottle container is 0.2 or more and 0.5 or less. The plastic bottle container according to 1 or 2 . The ratio (W3 / W2) of the distance W3 between the two opposing side surfaces of the constricted portion to the distance W2 between the two opposing side surfaces of the lower end portion of the lower body portion is 0.80 or more and 0.95 or less. The plastic bottle container according to claim 1 , wherein the plastic bottle container is provided.

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