JP3136090B2 - Resin bottle container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin bottle container having a body having a polygonal cross section.

[0002]

2. Description of the Related Art In such a bottle container, for example, annular irregularities are provided on the side surface of its body to increase the rigidity of the container and to absorb pressure fluctuations in the bottle container after the bottle container is capped. I have to.

[0003]

The unevenness provided on the side surface of the body for such a purpose has caused a problem where the unevenness is unexpected.

[0004] Resin bottle containers are discarded after the contents have been used up or collected for reuse, but in any case, they are transported from the consumer side to an appropriate place by a vehicle or the like. At that time, if the bottle container is transported as it is, it is bulky and the transportation cost is high. Therefore, it is preferable to transport the bottle container by crushing the bottle container from the viewpoint of economy.

However, the unevenness provided on the side surface of the bottle container makes it difficult to crush the bottle container, and even if crushed, the elastic restoring force is so strong that the bulk cannot be reduced as expected. The present invention has been made in view of the problems of the related art, and has an object to provide a resin bottle container in which a body portion has appropriate rigidity and pressure absorbing ability and is easily crushed.

[0006]

The present invention has the following features to attain the object mentioned above. According to a first aspect of the present invention, there is provided a resin bottle container having irregularities on a side surface of a body portion having a polygonal cross section. A resin bottle container is provided with a flat surface portion extending linearly over substantially the entire length along the axial direction of the body portion (corresponding to claim 1).

According to a second aspect of the present invention, a body having a polygonal cross section has a small width provided between a main side surface having irregularities and an adjacent main side surface to form a corner in plan view of the body portion. In a resin bottle container constituted by flat narrow side surfaces, a concave portion for facilitating crushing of the trunk portion is provided on the narrow side surface (claim). (Corresponds to item 2).

[0008] A third invention of the present application is a combination of the first invention and the second invention. At least a pair of the main side faces opposed to each other is located substantially at the center of the main side face in the width direction. A resin bottle container having a flat surface portion extending linearly over substantially the entire length along the axial direction of the body portion (corresponding to claim 3).

The unevenness provided on the side surface of the body portion in the first invention and the unevenness provided on the main side surface of the body portion in the second invention are concentrically formed by a rectangular annular concave portion and a convex portion. An arrangement and configuration can be exemplified. However, the shape of the unevenness is not limited to such a rectangular ring shape.

In the first invention or the third invention, when a compressive force is applied in the width direction of the side surface having the flat surface portion to crush the bottle container, the side surface is bent at the flat surface portion and permanently deformed.

[0011] In the second invention or the third invention,
When a compressive force is applied in the width direction of the side surface to crush the bottle container, the concave portion provided on the small width side makes it easier to crush the corner portion of the bottle container in plan view, and makes it difficult to restore the elasticity after the crush.

A fourth invention of the present application is based on the second invention or the third invention, and further has a groove extending at an angle to the axis of the body at a corner in a front view of a main side surface of the body. The resin bottle container is characterized in that the resin bottle container is provided (corresponding to claim 4). The groove on the main side surface also makes it easier to crush the corner in plan view of the bottle container, and makes it difficult to restore elasticity after crushing.

According to a fifth aspect of the present invention, the concave portion provided on the narrow side surface in the second, third or fourth aspect of the present invention is constituted by a straight groove extending at an angle to the longitudinal direction of the narrow side surface. It is a resin bottle container characterized by the above-mentioned (corresponding to claim 5).

A sixth invention of the present application is characterized in that the recess provided on the narrow side surface in the second invention, the third invention, or the fourth invention is constituted by a substantially triangular substantially flat concave surface. It is a resin bottle container (Claim 6).

The seventh invention of the present application is a combination of the fifth invention and the sixth invention, and is a combination of the second invention or the third invention.
The concave portion provided on the narrow side surface according to the invention or the fourth invention is characterized by comprising a combination of a straight groove extending obliquely with respect to the longitudinal direction of the narrow side surface and a substantially triangular substantially flat concave surface. It is a resin bottle container.
Corresponding to).

(Raw Materials of the Present Invention) Raw materials for the resin bottle container of the present invention include polyethylene, polypropylene, and polyethylene terephthalate (hereinafter abbreviated as PET).
For example, various resin materials can be exemplified.

[0017]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5. The following embodiment is an example of a PET bottle container (hereinafter referred to as a PET bottle). [First Embodiment] FIG. 2 is a front view of a plastic bottle according to a first embodiment of the present invention, and FIG. 1 is a side view of the same.

The plastic bottle 1 has a body 10 having a substantially rectangular cross section, and a mouthpiece 30 is provided at an upper end of the body 10.
A cap (not shown) can be screwed into the mouthpiece portion 30.

The body 10 has a pair of first main side surfaces 11 and 12 disposed on the front side and the rear side facing each other, and a pair of second main side surfaces 13 and 12 disposed on the left and right sides facing each other.
14, adjacent first main side surfaces 11 and 12, and second main side surface 1
And four small-width side surfaces 15 connecting the first and third side portions 14. The narrow side surfaces 15 form four corners when the body 10 is viewed from above.

The width of the second main side surfaces 13 and 14 is smaller than that of the first main side surfaces 11 and 12, and the width of the narrow side surface 15 is sufficiently smaller than that of the second main side surfaces 13 and 14. Therefore, the torso 1
The cross section of 0 can be said to be substantially rectangular.

The body 10 has a substantially annular groove 16 extending in the circumferential direction at a substantially middle position in the vertical direction. The groove 16 allows the first main side surfaces 11 and 12, the second main side surfaces 13 and 14, and the small width side surface 15. Is divided up and down. The trunk 10 has a groove 16
The lower part is slightly larger (that is, slightly thicker) than the upper part.

The upper and lower first main side surfaces 11 and 12 divided by the groove 16 respectively have substantially rectangular annular concave portions 1 in front view.
The protrusions and recesses 7a and the rectangular annular protrusions 17b are provided concentrically and alternately.

On the other hand, the second main side surfaces 13 and 14 have a flat surface portion 2 extending substantially linearly over substantially the entire length along the axial direction (vertical direction) of the body portion 10 at substantially the center in the width direction.
0 is formed. The flat surface portion 20 is formed flush with the outer edges of the second main side surfaces 13 and 14 located above the groove 16.

FIG. 3 is a conceptual view of the flat surface portion 20. The lower portion of the actual body portion 10 is slightly thicker than the upper portion with the groove 16 as a boundary, as described above. Also, a step 21 is formed at the boundary between the groove 16 and the lower second main side surfaces 13 and 14.

The upper and lower second main side surfaces 13 and 14 divided by the groove 16 are provided with concavities and convexities in which concave portions 18 a and convex portions 18 b having a bow shape in a front view are alternately arranged on both sides of the flat surface portion 20. ing. Since FIG. 3 is a conceptual diagram, only the concave portion 18a is shown.

In this embodiment, the narrow side surface 15 is formed as a flat surface. The plastic bottle 1 configured as described above has a concave portion 17a in the first main side surfaces 11 and 12 of the body portion 10,
The second main side surfaces 13 and 14 are provided with projections and depressions composed of projections 17b.
The body 10 has rigidity enough to withstand actual use, and has a moderate pressure absorbing ability against internal pressure changes after the cap is mounted. are doing.

Further, when the used plastic bottle 1 is crushed by applying a compressive force W in the width direction of the second main side surfaces 13 and 14 as shown in FIG. The surface portion 20 is bent so as to project outward, and is permanently deformed as it is.

That is, the flat surface portion 20 makes it easier to crush the plastic bottle 1 and the permanent deformation of the flat surface portion 20 makes it difficult for the plastic bottle 1 to be elastically restored. [Second Embodiment] FIG. 4 is a front view of a plastic bottle 1 according to a second embodiment of the present invention. In the case of the plastic bottle 1 according to the second embodiment, similarly to the first embodiment, the concave portions 17 are formed in the first main side surfaces 11 and 12.
a, the projections and depressions 17b are provided, and the second main side surface 1
Concavities and convexities including a concave portion 18a and a convex portion 18b are provided on the third and third surfaces 14, and a flat surface portion 20 is formed on the second main side surfaces 13 and 14.

In the second embodiment, in addition to this, FIG.
As shown by hatching, flat recesses 22 having a substantially right-angled triangular shape are provided on both sides of the groove 16 in the narrow width side surface 15 of the body 10. The hypotenuse of the recess 22 is inclined with respect to the axis of the body 10, and the hypotenuses are arranged to face each other.

The grooves 16 are formed on the first main side surfaces 11 and 12.
In the corner adjacent to the first main side surface 11 of the concave portion 22,
A straight groove 23 extending obliquely from the vicinity of the 12th edge and continuing to the groove 16 is provided.

The recesses 22 and the grooves 23 facilitate the crushing of the middle part of the body 10, that is, the corners of the body 10 near the groove 16, when the PET bottle 1 is crushed. Permanent deformation is easy, and the crushed plastic bottle 1 is hardly elastically restored. [Third Embodiment] FIG. 5 is a front view of a plastic bottle 1 according to a third embodiment of the present invention. Also in the case of the plastic bottle 1 according to the third embodiment, similarly to the first embodiment, the concave portions 17 are formed in the first main side surfaces 11 and 12.
a, the projections and depressions 17b are provided, and the second main side surface 1
Concavities and convexities including a concave portion 18a and a convex portion 18b are provided on the third and third surfaces 14, and a flat surface portion 20 is formed on the second main side surfaces 13 and 14.

In the third embodiment, in addition to this, FIG.
As shown by hatching, a plurality of flat portions 24 having a substantially right triangle shape are provided on the narrow side surface 15 of the body portion 10. Each of the oblique sides of the recess 24 is inclined with respect to the axis of the body 10.

The upper and lower narrow side surfaces 15 divided by the groove 16 are each provided with a straight groove 25 that is inclined with respect to the axis of the body 10 between the concave portions 24. These recesses 24 and grooves 25 make it easy to crush the corner of the body 10 provided with the narrow side surface 15 over substantially the entire length when crushing the plastic bottle 1, and to easily deform the corner permanently. Thus, the crushed plastic bottle 1 is hardly elastically restored. [Test Results] Various comparison tests were performed on the plastic bottle 1 of the first embodiment of the present invention, the plastic bottle 1 of the third embodiment, and a conventional plastic bottle, and the following results were obtained. I got Each of the PET bottles was for 2 liters, and the conventional product had no flat surface portion 20 in the PET bottle 1 of the first embodiment. 1. Buckling test Table 1 shows the results of a comparative experiment on the buckling strength of empty PET bottles.

[0034]

[Table 1] From Table 1, it can be seen that the plastic bottle according to the present invention has lower buckling strength than the conventional plastic bottle. However, even if the buckling strength is small, it is a strength enough to withstand a normal use state, and there is no problem. 2. Crush test Tables 2 and 3 show the first main side surfaces 11 and 1 of the plastic bottle 1.
When a load was applied to each part vertically and crushed,
It is the result of measuring the load required until each part collapses to the extent that it does not return elastically. In Tables 1 and 2, the order of the crushed parts is changed. The symbols of the crushed parts in the table are shown in FIGS. 6 and 7.
6A to 6E are the central portions of the first main side surfaces 11 and 12, and F and G in FIG. 7 are the side portions of the first main side surfaces 11 and 12.

[0035]

[Table 2]

[0036]

[Table 3] Tables 2 and 3 show that the PET bottle 1 according to the present invention can be crushed with a smaller load than the conventional product. In addition, when the load in the table where the plastic bottle 1 according to the present invention was crushed was applied to the conventional product, the conventional product did not crush, and when the load was removed, the plastic bottle was elastically restored. Table 4
As shown in the cross-sectional view of FIG. 8, when the load W is applied vertically to each part of the two narrow side surfaces 15 located on the diagonal of the plastic bottle 1 and crushed, each part does not recover elastically. It is the result of measuring the load required until it collapses. The symbols of the crushed parts in the table correspond to the positions in the axial direction of A to E in FIG.

[0037]

[Table 4]

[0038]

As described above, according to the present invention,
A flat surface extending in the axial direction is provided on the side surface (or the main side surface) of the body having a polygonal cross section, a concave portion is provided on a narrow side surface of the body, or the body is provided at a corner of the main side surface of the body. By providing grooves that extend diagonally to the axis, or by combining them, the resin bottle container has sufficient rigidity to withstand use, but is easily crushed in an empty container state and elastically restored after crushing. An excellent effect that it becomes difficult to perform is exhibited.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment of a resin bottle container according to the present invention.

FIG. 2 is a front view of the first embodiment of the resin bottle container of the present invention.

FIG. 3 is a side view showing the concept of the first embodiment of the resin bottle container of the present invention.

FIG. 4 is a front view of a second embodiment of the resin bottle container of the present invention.

FIG. 5 is a front view of a third embodiment of the resin bottle container of the present invention.

FIG. 6 is a front view showing a crushed part in a crush test.

FIG. 7 is a front view showing a crushed part in a crush test.

FIG. 8 is a cross-sectional view showing a crushed portion in a crush test.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 PET bottle (resin bottle container) 10 Body 11, 12 1st main side 13, 14 2nd main side 15 Narrow side 17a Concave 17b Convex 18a Concave 18b Convex 20 Flat surface 22 Recess 23 Groove 24 Recess 25 Groove

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 2-102316 (JP, U) JP-A 1-96814 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B65D 1/02 B65D 21/08

Claims (7)

(57) [Claims] 1. A resin bottle container having irregularities on the side surface of a body portion having a polygonal cross section, wherein at least a pair of opposed side surfaces are disposed at substantially the center in the width direction of the side surface. A resin bottle container provided with a flat surface portion extending linearly over substantially the entire length along the axial direction of the portion. 2. A torso having a polygonal cross section has a main side surface having projections and depressions, and a narrow and flat narrow side surface provided between adjacent main side surfaces to form a corner in plan view of the torso portion. In the resin bottle container thus constituted, a concave portion is provided on the narrow side surface so as to easily crush the body portion. 3. A flat surface portion, which is located substantially at the center in the width direction of the main side surface and extends linearly over substantially the entire length along the axial direction of the body portion, at least in the pair of the main side surfaces opposed to each other. The resin bottle container according to claim 2, which is provided. 4. The resin bottle according to claim 2, wherein a groove extending obliquely to an axis of the body is provided at a corner of the main side of the body viewed from the front. container. 5. The resin bottle according to claim 2, wherein the concave portion provided on the narrow side surface is constituted by a linear groove extending inclining with respect to the longitudinal direction of the narrow side surface. container. 6. The resin bottle container according to claim 2, wherein the concave portion provided on the narrow side surface is constituted by a substantially triangular, substantially flat concave surface. 7. The concave portion provided on the small-width side surface is formed by combining a straight groove extending inclining with respect to the longitudinal direction of the small-width side surface and a substantially flat concave surface having a substantially triangular shape. The resin bottle container according to claim 2.