JP2011195148A - Synthetic resin-made container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic resin-made container in which the rigidity against a load in the lateral direction is increased.SOLUTION: The synthetic resin-made container has a mouth portion 2, a shoulder portion 3, a barrel portion 4 and a bottom portion 5. The barrel portion 4 is divided into the upper barrel portion 4a and a lower barrel portion 4b by a waist portion 40. The upper edge of the upper barrel portion side slope 40a of the waist portion 40 to be connected to the lower edge of the upper barrel portion 4a is bent outward of the container, and the lower edge of the upper barrel portion 4a with the bent slope 40a being connected thereto is downwardly projected toward the waist portion 4 side in the height direction. Thus, a stepped portion 45 is formed between the upper barrel portion 4a and the waist portion 40.

Description

  The present invention relates to a synthetic resin container molded into a bottle shape.

  Conventionally, a synthetic resin container formed by forming a preform using a synthetic resin such as polyethylene terephthalate and then molding the preform into a bottle shape by stretch blow molding or the like contains various beverage products. It is known as a beverage container (see Patent Document 1).

  In addition, this type of container is filled and sealed with the contents, and various labels for displaying the contents are attached to the market, and one of such labels is cut into a strip shape. What is called a so-called wound label is known in which the label is wound around the body of the container and attached.

JP-A-10-29615

By the way, for these types of synthetic resin containers, in recent years, there is a strong demand for weight reduction and cost reduction by reducing the amount of resin used, so the container is molded as thin as possible. There have been many attempts to do this.
However, if the container is simply made thin, the rigidity of the container is impaired by the reduced thickness, and there is a concern about the problem caused by such a decrease in rigidity. For example, a wound label such as that described above is usually wound along the circumferential direction of the container after the label end coated with the adhesive is pressed against the side of the container and temporarily fixed. If the rigidity is not ensured, the container may be deformed when the end of the label is pressed against it, which may hinder label mounting.

  The present invention has been made in view of the circumstances as described above. For example, when a wound label is mounted, in particular, a portion where the wound label is mounted so as not to hinder the mounting. It is an object of the present invention to provide a synthetic resin container in which the rigidity with respect to the load from the lateral direction is further increased.

  A synthetic resin container according to the present invention is a synthetic resin container having a mouth, a shoulder, a trunk, and a bottom, and the trunk narrows a part of the trunk in the radial direction. The upper waist part and the lower body part are divided by the provided waist part, and the waist part is connected to the lower end edge of the upper body part, and the upper body part side slope and the upper end edge of the lower body part A lower torso side slope that is connected to the upper body side slope, and bending one or both of the upper end edge of the upper torso side slope and the lower end edge of the lower torso side slope toward the outside of the container By projecting either one or both of the lower end edge of the upper body part and the upper end edge of the lower body part connected to the bent slope to the waist part side along the height direction, Either between the upper body part and the waist part or between the lower body part and the waist part It is constituted of forming the stepped portion both on.

  ADVANTAGE OF THE INVENTION According to this invention, the synthetic resin container in which the rigidity with respect to the load from a horizontal direction was improved more can be provided.

It is explanatory drawing which shows the outline of embodiment of the synthetic resin containers based on this invention. It is explanatory drawing which shows the outline of embodiment of the synthetic resin containers based on this invention. It is explanatory drawing which shows the outline of embodiment of the synthetic resin containers based on this invention. It is an important section expanded sectional view of an embodiment of a synthetic resin container concerning the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
1-3 is explanatory drawing which shows the outline of the synthetic resin container concerning this embodiment, FIG.1 (a) is a front view, FIG.1 (b) is a top view, FIG.1 (c) is a bottom face FIG. 1 and FIG. 1D are DD cross-sectional views of FIG. 2 (a) is a side view, FIG. 2 (b) is a BB end view of FIG. 1 (b), and FIG. 3 (a) is an AA end view of FIG. 1 (b). FIG. 3 and FIG. 3B are CC end views of FIG.
In addition, in the cross-sectional view shown in FIG. 1D, the illustration of the internal shape of the container 1 that can be seen through the cut is omitted. Moreover, in the end view shown in FIG.2 (b), FIG.3 (a), FIG.3 (b), only the end surface shape of each cut end is shown.

In the present embodiment, the container 1 is illustrated by, for example, biaxially stretching blow-molding a bottomed cylindrical preform made of a thermoplastic resin manufactured by known injection molding or compression molding. It is formed into a predetermined container shape having a mouth portion 2, a shoulder portion 3, a body portion 4, and a bottom portion 5.
As the thermoplastic resin used to mold the container 1, any resin can be used as long as stretch blow molding is possible. Specifically, thermoplastic polyesters such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, polylactic acid or copolymers thereof, those blended with these resins or other resins are suitable. It is. In particular, an ethylene terephthalate thermoplastic polyester such as polyethylene terephthalate is preferably used. Further, acrylonitrile resin, polypropylene, propylene-ethylene copolymer, polyethylene and the like can be used.

  In the illustrated example, the mouth portion 2 is formed in a cylindrical shape, and a screw thread for attaching a lid body (not shown) is provided on the side surface on the opening end side of the mouth portion 2 as lid body attaching means. Yes. Thereby, after filling the contents, the inside of the container 1 can be sealed by attaching the lid to the mouth portion 2.

The shoulder portion 3 is located between the mouth portion 2 and the trunk portion 4 and is formed so as to continue to the trunk portion 4 while expanding the diameter from directly below the mouth portion 2. The trunk | drum 4 is a part which occupies most of the height direction of the container 1, and in this embodiment, the cross section orthogonal to a height direction is made into the rectangular shape which rounded the corner | angular part. . Thereby, the container 1 is made into the square bottle-shaped container shape.
The height direction means a direction along a direction perpendicular to the horizontal plane when the container 1 is placed on the horizontal plane with the mouth portion 2 facing up.

Moreover, the trunk | drum 4 is divided into the upper trunk | drum 4a and the lower trunk | drum 4b by the waist part 40 provided so that a part of trunk | drum 4 might be narrowed down to radial direction. And the waist part 40 which divides the trunk | drum 4 into the upper trunk | drum 4a and the lower trunk | drum 4b is connected to the upper trunk | drum 40a connected to the lower end edge of the upper trunk | drum 4a, and the upper end edge of the lower trunk | drum 4b. And a lower torso side inclined surface 40b.
Such a waist portion 40 is provided along the circumferential direction of the trunk portion 4 in order to increase the rigidity in the vicinity of the center of the container 1 in the height direction, and the upper trunk portion side slope 40a and the lower trunk portion side slope 40b. If the bottom face 40c is provided between the two, it is easy to secure the axial load strength (compressive strength from the height direction), which is preferable. Further, the upper trunk side slope 40a and the lower trunk side slope 40b are brought closer to parallel to the height direction, and the inclination angle θa and the height of the upper trunk side slope 40a with respect to the height direction shown in FIG. When the inclination angle θb of the lower body side slope 40b with respect to the direction is set to 10 to 40 °, it is more preferable because the slopes 40a and 40b are not easily tilted in the horizontal direction when an axial load is applied.
Furthermore, in order to ensure the rigidity of the waist part 40, the lower trunk | drum side slope 40b located between the upper trunk | drum side slope 40a and the bottom face 40c located in the upper trunk | drum 4a side, and the lower trunk | drum 4b side. It is preferable that concave grooves 40d and 40e recessed inward of the container as shown in the figure are formed between the bottom surface 40c and the bottom surface 40c.

  In the upper body 4a, four lateral grooves 41a provided along the circumferential direction are arranged at substantially equal intervals in the height direction. The transverse groove 41a formed in the upper body 4a is mainly provided to ensure the axial load strength of the container 1, but when the contents are filled and sealed at a high temperature, the pressure in the container decreases after cooling. Sometimes, the container 1 can be provided to absorb the decrease in internal pressure by deforming (contracting) the container 1 in the vertical direction. Similar lateral grooves 41b are also arranged in the lower body portion 4b at substantially equal intervals in the height direction.

  Further, when the horizontal groove 41a as described above is provided in the upper body portion 4a, in the illustrated example, the horizontal groove 41a is formed at the center in the width direction of each plane portion on the long side and the short side of the upper body portion 4a. A lateral groove reinforcing concave bead 42 that is wider than the lateral groove 41a and is deeper than the lateral groove 41a is provided so as to overlap the lateral groove 41a. On the other hand, a grip portion 43 that is recessed toward the inside of the container is provided in a portion extending from the waist portion 40 to the lower body portion 4b in the center in the width direction on the long side, so that the user can easily grip the container 1. I am doing so.

  In this embodiment, the upper body part 4a of the container 1 has an outer diameter slightly smaller than that of the lower body part 4b, and the contents filled and sealed in the container 1 are displayed on the upper body part 4a. A winding label is attached. Examples of the method for attaching the label to the container 1 include the methods disclosed in JP-A-5-4279, JP-A-2005-22662, JP-A-2005-82154, and the like. Also, when attaching the label, the outer diameter of the upper body 4a and the lower body 4b are different, and the wound label is attached to the smaller outer diameter, for example, when carrying a line or packing in a box The containers come into contact with each other, and at this time, it is possible to effectively avoid rubbing and damaging the label. Furthermore, in this embodiment, although the outer diameter of the upper trunk | drum 4a is made smaller than the outer diameter of the lower trunk | drum 4b, since such an aspect can make it easy to make the container 1 stand upright stably. preferable.

  The range in which the wound label cut into a strip shape is attached is indicated by a symbol R in FIG. 3B. In the present embodiment, the upper end side of the wound label is the shoulder portion 3 and the upper body portion 4a. And the lower end side of the wound label is mounted so as to be close to the boundary between the upper body portion 4a and the waist portion 40. When the winding label is attached in this way, the container 1 is adapted to the lateral load so that the step portions 44 and 45 are formed at the boundaries where the upper end side and the lower end side of the winding label are close to each other. The rigidity can be increased.

Here, in FIG. 3B, the portion surrounded by the alternate long and short dash line α is shown enlarged in FIG. 4A, and in FIG. 3B, the portion surrounded by the alternate long and short dash line β is enlarged to FIG. 4B. Show. As shown in these drawings, at the boundary between the shoulder portion 3 and the upper body portion 4a, the lower end edge of the shoulder portion 3 connected to the upper end edge of the upper body portion 4a is bent toward the outside of the container. (At this time, the bent portion formed on the lower end edge side of the shoulder portion 3 is indicated by reference numeral 44a), and by projecting the upper end edge of the upper body portion 4a upward toward the shoulder portion 3 side along the height direction ( At this time, a protruding portion formed on the upper end edge side of the upper body portion 4a is indicated by reference numeral 44b), and a stepped portion 44 is formed between the shoulder portion 3 and the upper body portion 4a.
On the other hand, at the boundary between the upper body portion 4a and the waist portion 40, the upper end edge of the upper body portion-side inclined surface 40a connected to the lower end edge of the upper body portion 4a is bent toward the outside of the container. (At this time, a bent portion formed on the upper edge side of the upper body side inclined surface 40a is indicated by reference numeral 45a), and a lower end edge of the upper body portion 4a to which the bent inclined surface 40a is connected is a waist portion along the height direction. By projecting downward toward the 40 side (at this time, a projecting portion formed on the lower end edge side of the upper body portion 4a is indicated by reference numeral 45b), a step 45 is formed between the upper body portion 4a and the waist portion 40. To be formed.

By forming such stepped portions 44 and 45, for example, when the wound label is mounted, the load from the lateral direction at the portion where the wound label is mounted is not hindered. The rigidity against can be increased.
That is, when attaching the wound label to the container 1, the label end to which the adhesive is applied is pressed against the side surface of the container 1 and temporarily fixed, and then wound along the circumferential direction of the container 1. As described above, at this time, the container 1 is prevented from being deformed when the end of the label is pressed by increasing the rigidity against the load from the lateral direction at the portion where the wound label is mounted. Thus, it is possible to prevent the label from being hindered.
In addition, when the angle of intersection between the upper body side slope 40a and the body wall surface of the upper body 4a is dull and the ridge line that is the intersection of these surfaces is difficult to clearly appear, it is difficult to obtain sufficient rigidity. 45 can be effectively reinforced by the bent portion 45a and the protruding portion 45b.

Further, as in the present embodiment, when the present invention is applied to the rectangular bottle-shaped container 1, the step portion 44 formed between the upper body portion 4 a and the shoulder portion 3, the upper body portion 4 a, and the waist The step portion 45 formed between the upper portion 4a and the portion 40 only needs to be formed so as to be positioned at least in the corner portion of the container 1, but in order to increase the rigidity against the load from the lateral direction, The step portion 45 formed between the waist portion 40 is preferably formed over the entire circumference of the container 1. By forming the step 45 over the entire circumference of the container 1, it is possible to increase the rigidity of the upper trunk side slope 40 a when the container 1 is gripped by the waist part 40.
Needless to say, the step 44 formed between the upper body 4a and the shoulder 3 can also be formed over the entire circumference of the container 1 as necessary.

  Although the present invention has been described with reference to the preferred embodiment, it is needless to say that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. .

  For example, in the above-described embodiment, an example is shown in which the step 44 is formed between the upper body 4 a and the shoulder 3 and the step 45 is formed between the upper body 4 a and the waist 40. However, in the present invention, a step similar to the step 45 formed between the upper trunk 4a and the waist 40 may be formed between the lower trunk 4b and the waist 40. Good. That is, at the boundary between the lower body portion 4b and the waist portion 40, the lower end edge of the upper body side inclined surface 40b connected to the upper end edge of the lower body portion 4b is bent toward the outside of the container and bent. The upper end edge of the lower body part 4b to which the inclined surface 40b is connected is projected upward toward the waist part 40 along the height direction, so that a step portion is provided between the lower body part 4b and the waist part 40. May be formed.

  Here, by making the outer diameters different between the upper body part 4a and the lower body part 4b and attaching the wound label to the smaller outer diameter, it is possible to effectively avoid rubbing and damaging the label. As described above, when the outer diameter of the lower body 4b is made smaller and a winding label is attached to the lower body 4b, the space between the lower body 4b and the waist 40 can be reduced. A step portion similar to the step portion 45 may be formed and attached so that the upper end side of the wound label is close to the step portion.

  Further, in the container 1 illustrated in the above-described embodiment, the shoulder 3 is formed by a relatively wide and large slope, and it is possible to ensure a certain degree of rigidity against a load from the lateral direction. In such a case, the step portion 44 formed between the upper body portion 4a and the shoulder portion 3 may be omitted as necessary. In the present invention, the upper body portion 4a and the waist portion may be omitted. The step portion as described above may be formed between one portion or both of the portion 40, the lower body portion 4 b, and the waist portion 40.

  Further, in the above-described embodiment, in order to ensure the rigidity of the waist portion 40, it is recessed both between the upper trunk side slope 40 a and the bottom face 40 c and between the lower trunk side slope 40 b and the bottom face 40 c. Although an example in which the grooves 40d and 40e are formed has been shown, when the concave grooves 40d and 40e are formed, at least one of them may be formed. Specifically, in consideration of which of the upper body part 4a and the lower body part 4b the winding label is attached, when forming a step between the upper body part 4a and the waist part 40, at least In the case where a concave groove 40d is formed between the upper body side slope 40a and the bottom surface 40c and a step is formed between the lower body part 4b and the waist part 40, at least the lower body side slope 40b and the bottom surface A concave groove 40e may be formed between 40c and 40c. This is preferable because the grooves 40d and 40e supplementarily reinforce the upper body 4a or the lower body 4b on the side where the step is provided.

  In the embodiment described above, the cross section orthogonal to the height direction of the body portion 4 is rectangular, but the cross section may be square. Furthermore, the said cross section can be made into circular shape, and the container 1 can also be made into a round bottle-shaped container shape, and the specific form of the trunk | drum 4 is not specifically limited.

  The synthetic resin container according to the present invention as described above can be applied to various synthetic resin containers formed into a bottle shape.

DESCRIPTION OF SYMBOLS 1 Container 2 Mouth part 3 Shoulder part 4 trunk | drum 4a upper trunk | drum 4b lower trunk | drum 40 waist part 40a upper trunk | drum side slope 40b lower trunk | drum side slope 40c bottom face 40d, 40e recessed groove 44, 45 step part 5 bottom part

Claims (8)

A synthetic resin container having a mouth, a shoulder, a trunk and a bottom,
The waist part is divided into an upper body part and a lower body part by a waist part provided so as to narrow a part of the body part in a radial direction, and the waist part is formed of the upper body part. An upper torso side slope connected to the lower end edge, and a lower torso side slope connected to the upper end edge of the lower torso,
One or both of the upper end edge of the upper body side slope and the lower end edge of the lower body side slope are bent toward the outside of the container, and the lower end of the upper body part to which the bent slope is connected By projecting either one or both of an edge and an upper end edge of the lower body part toward the waist part side along the height direction, the lower body part is provided between the upper body part and the waist part. A synthetic resin container in which a step portion is formed at one or both between the waist portion and the waist portion.   The synthetic resin container according to claim 1, wherein an outer diameter of the upper body portion is made smaller than an outer diameter of the lower body portion, and a step portion is formed at least between the upper body portion and the waist portion.   The lower end edge of the shoulder portion connected to the upper end edge of the upper body portion is bent toward the outside of the container, and the upper end edge of the upper body portion is protruded toward the shoulder side along the height direction. The synthetic resin container according to claim 2, wherein a step portion is formed between the shoulder portion and the upper body portion. A rectangular bottle-shaped synthetic resin container in which the cross section perpendicular to the height direction of the body portion is rectangular,
A step portion formed between the upper body portion and the waist portion, and a step portion formed between the upper body portion and the shoulder portion,
The synthetic resin container according to any one of claims 2 and 3, wherein the synthetic resin container is formed so as to be positioned at least at a corner portion of the container.   The step part formed in any one or both between the said upper trunk | drum and the said waist part, and between the said lower trunk | drum and the said waist part is formed over the perimeter of the said container. The synthetic resin container as described in any one of -4.   Between at least one of the bottom surface of the waist part and the upper body part side slope located on the upper body part side, and between the bottom surface of the waist part and the lower body part side slope located on the lower body part side, The synthetic resin container according to any one of claims 1 to 5, wherein a concave groove recessed inward of the container is formed.   The synthetic resin container according to claim 6, wherein the step portion is formed between the upper body portion and the waist portion, and a pre-groove is formed at least between the upper body side inclined surface and the bottom surface. .   The synthetic resin container according to claim 6, wherein the step portion is formed between the lower body portion and the waist portion, and the concave groove is formed at least between the lower body side inclined surface and the bottom surface. .

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