JP2018008752A - Bottle container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bottle container in which deformation due to a load hardly occurs, even when the bottle container is made light weight.SOLUTION: A bottle container is configured so that, a horizontal cross section of a trunk 2 is an almost rectangular shape having a long side and a short side, the horizontal cross section has a long side surface having a long side and a short side surface having a short side, a rib formation part 2a having ribs 2a1 protruding to inside of the container, is provided on a center part of the bottle body in a height direction, the ribs are provided on a direction orbiting the trunk part. The trunk part has an upper surface contact part 2b and a lower surface contact part 2b' which contact other bottle body in surface contact, on upper and lower parts of the rib formation part, when the bottle body and other bottle body having a similar shape are arranged in an erected state. A vertical plane extended to a lower side of the upper surface contact part, a vertical plane extended to an upper side of the lower surface contact part, and an outside part of the rib formation part are flush, and the bottle body has a neck 3, and a cylindrical shoulder part 4 which becomes a tapered shape from an upper end of the upper surface contact part to a lower end of the neck, the shoulder part has a curve part 6 whose curvature radius curved to outside of the bottle body is 83 mm or larger.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bottle container.

  A synthetic resin bottle container typified by a PET bottle is widely used as a beverage container because of its excellent light weight.

This type of bottle container is composed of a bottle body having an opening for filling and taking out beverages, a lid for closing the opening of the bottle body, a label wound around the bottle body, and the like. Yes.
And a bottle container is handled in the form where the trunk | drum which comprises the height direction center part of the said bottle main body is hold | gripped by the user at the time of taking out a drink.

In recent years, due to the demand for resource saving, the bottle body has been required to be thin.
However, when the bottle main body is thinned, for example, when the body portion of the bottle main body is gripped, there is a possibility that the force against the gripping may not be sufficiently exerted, and thus the bottle container may be difficult to hold. .

As a method of improving the difficulty of holding such a bottle container, a body portion of the bottle body is formed slightly thinner than a shoulder portion above the bottle body.
In addition, it has been conventionally adopted as a method for improving the ease of holding a bottle container by providing a plurality of ribs that circulate around the bottle body at the center in the height direction of the bottle body to improve the catch on the fingertip ( For example, Patent Document 1).

Special table 2010-507539

By the way, in recent years, it has been demanded in general logistics to reduce packaging materials.
For this reason, PET bottles, etc., can be bundled and transported by shrink-packing them with heat-shrinkable films instead of storing them in cardboard boxes and transporting them in a conventional manner. Is coming to be done. At this time, due to the heat shrinkage of the heat shrinkable film, the plastic bottle in the shrink pack is pressed from the outside. Since the outer surface of the conventional PET bottle is a curved surface, when the PET bottles are arranged in an upright state, the PET bottles are in a point contact or line contact state.
And in the bottle container which made the center part of the bottle main body slender, a contact state turns into a point contact or a line contact in the comparatively high position and low position of a bottle main body, and it will be in the state which does not contact mutually in a trunk | drum. When a strong pressing force is generated at the time of packaging with a heat-shrinkable film, the bottle container located outside has a problem that the bottle main body is deformed because it cannot resist the pressing force in the body portion.

A bundle of shrink-packed bottle containers is usually stacked in a plurality of stages in the vertical direction during transportation or storage.
Thereby, since a load is applied to the bottle container in the vertical direction, the conventional bottle container has a problem that it is more easily deformed by the pressing force from the side by the heat shrink film and the load.
It should be noted that the deformation of the bottle container does not occur only when the shrink-packed ones are stacked, and suppressing the deformation is a matter that is widely required for the conventional bottle containers.

  In view of the above problems, an object of the present invention is to provide a bottle container that hardly deforms due to a load even when the weight of the bottle body is further reduced.

The present invention is a bottle container comprising a bottle body made of synthetic resin,
The bottle body has a cylindrical body with a rectangular column shape,
The horizontal cross-sectional shape of the body is a substantially rectangular shape having a long side and a short side,
The trunk has a long side having the long side and a short side having the short side,
The body portion is provided with a rib forming portion having a rib protruding inside the container at a central portion in the height direction of the bottle body,
The rib is provided in a direction around the trunk,
The body includes an upper surface contact portion and a lower surface that are in surface contact with the other bottle main body at an upper portion and a lower portion than the rib forming portion when the bottle main body is arranged in an upright state with another bottle main body having the same shape. Each has a contact portion,
In the bottle container, the virtual plane extending below the upper surface contact portion, the virtual plane extending above the lower surface contact portion, and the outer portion of the rib forming portion are flush with each other.

  Since the bottle main body of such a bottle container is flush with the upper surface contact portion, the lower surface contact portion, and the outer portion of the rib forming portion, it stands upright with other bottle main bodies having the same shape. When arranged in a state, the other bottle main body and the long side surfaces are in contact with each other from the upper surface contact portion above the rib forming portion to the lower surface contact portion below. Thereby, even if the force which is going to bend a bottle main body is applied to such a bottle container, since it can disperse | distribute stress by surface contact, it becomes difficult to produce the deformation | transformation by a load.

  Further, in the bottle container according to the present invention, preferably, the body portion is outward from the outer portion of the rib forming portion in the horizontal direction above and below the rib forming portion on the short side surface. Each has an upper bulge and a lower bulge.

  Such a bottle container has the upper bulging portion and the lower bulging portion on the short side surface, so that the bottle container has a point contact or line with other bottle containers as compared with a bottle container having a bulging portion on the long side surface. This has the advantage that contact can be reduced. Further, such a bottle container has the upper bulging part and the lower bulging part, so that when the label is attached to the rib forming part, the label is peeled off by contact with another bottle container. It has the advantage that it can be prevented. Furthermore, such a bottle container has the advantage that it has excellent design properties by having the upper bulging portion and the lower bulging portion.

In the bottle container according to the present invention, preferably, the bottle body is formed in a cylindrical neck portion having an opening formed at an upper end, and a cylindrical shape that tapers from an upper end of the upper surface contact portion toward a lower end of the neck portion. With shoulders,
The shoulder portion has a curved portion that curves toward the outside of the bottle body,
The curvature radius of the curved portion is 83 mm or more.

  Such a bottle container has an advantage that deformation of the shoulder due to a load applied in the vertical direction can be suppressed when the radius of curvature of the curved portion is 83 mm or more.

  As described above, according to the present invention, it is possible to provide a bottle container that is less likely to be deformed by a load even when the weight of the bottle body is further reduced.

The schematic front view of the bottle main body of this embodiment. The schematic side view of the bottle main body of this embodiment. The schematic perspective view of the bottle main body of this embodiment. BB sectional drawing of FIG. The schematic front view of the shoulder part and neck part of the bottle main body of Reference Example 1 (numerical unit: mm). The schematic side view (unit of a numerical value: mm) of the shoulder part of the bottle main body of the reference example 1, and a neck part. The schematic front view of the shoulder part of the bottle main body of Example 3, and a neck part (unit of a numerical value: mm). The schematic side view (unit of a numerical value: mm) of the shoulder part of the bottle main body of Example 3, and a neck part. The schematic front view of the shoulder part of the bottle main body of Example 4, and a neck part (numerical unit: mm). The schematic side view (unit of a numerical value: mm) of the shoulder part of the bottle main body of Example 4, and a neck part.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  The bottle container of the present embodiment includes a bottle main body having an opening for filling and taking out an object to be contained such as a beverage, and a cap-shaped lid for closing the opening of the bottle main body. The bottle container of the present embodiment includes, for example, beverages (drinking water, tea, fruit juice, coffee, cocoa, soft drinks, alcoholic beverages, milk beverages, soups, etc.) and liquid seasonings (sauce, soy sauce, etc.). And so on. In addition, the content of the bottle container is not particularly limited. Depending on the type of liquid to be filled, etc., a comparatively small volume of several milliliters to hundreds of milliliters is compared to several liters. It may be arbitrarily set up to a large capacity. As the bottle container, for example, a bottle container having an internal capacity of 1 to 2 liters is suitable.

  The bottle body and the lid are made of synthetic resin. Examples of the synthetic resin include polyethylene terephthalate resin, polypropylene resin, and high density polyethylene resin. The bottle body and the lid may be formed of the same synthetic resin or may be formed of different synthetic resins.

The bottle body will be described with reference to the drawings.
In the following, the vertical direction in the standing posture of the bottle body is referred to as the up-down direction or the height direction.
As shown in FIGS. 1 to 3, the bottle main body 1 has a bowl-shaped bottom portion 5 that spreads in the horizontal direction, and a cylindrical shape that is erected with substantially the same width upward along the outer periphery of the bottom portion 5. A body 2, a cylindrical shoulder 4 tapering upward from the upper end of the body 2, and an opening 3 a at the upper end, and a cylindrical shape extending upward from the shoulder 4 And a neck 3.

The trunk is formed in a quadrangular prism shape.
As shown in FIG. 4, the horizontal cross-sectional shape of the body portion 2 is a substantially rectangular shape having a long side and a short side.
In the following description, a side surface having the long side in the cross section of the body portion 2 is also referred to as a long side surface, and a side surface having a short side in the cross section of the body portion 2 is referred to as a short side surface. 1-4, the forward direction is indicated by F, the backward direction is indicated by B, the left direction is indicated by L, and the right direction is indicated by R.
The body portion 2 includes a rib forming portion 2a having a rib 2a1 projecting inward of the bottle body and a non-projecting portion 2a2 not projecting inward at the center in the height direction of the bottle body 1. The rib 2a1 is formed in a direction that goes around the body 2.

  As shown in FIG. 1, the bottle main body 1 has shapes on the right surface and the left surface, respectively, where the non-projecting portions 2 a 2 come into contact with each other when aligned with other bottle main bodies having the same shape.

As shown on each of the right side and the left side in FIG. 1, the body part 2 has an upper surface contact part 2 b that is in surface contact with the other bottle body above the rib forming part 2 a having a long side surface. Moreover, the said trunk | drum 2 has lower surface contact part 2b 'which carries out surface contact with the said other bottle main body under the said rib formation part 2a of a long side. Note that the lower edge of the lower surface contact portion 2 b ′ is connected to the bottom portion 5.
The upper surface contact portion 2b, the lower surface contact portion 2b ′, and the non-projecting portion 2a2 that is an outer portion of the rib forming portion 2a are flush with each other. Further, the non-projecting portion 2a2, the upper surface contact portion 2b, and the lower surface contact portion 2b ′, which are the outer portions of the rib forming portion 2a, are arranged on the long side surface, that is, the right surface and the left surface in FIG. Have the same width.
The length of the upper contact portion 2b, the lower contact portion 2b ′, and the rib forming portion 2a, that is, the body portion 2 is preferably 2/3 or more of the height of the bottle body 1.

  As shown on the front and rear surfaces in FIG. 2, the trunk portion 2 is a non-projecting portion that is an outer portion of the rib forming portion 2 a in the horizontal direction above and below the rib forming portion 2 a on the short side surface. It has an upper bulging portion 2c and a lower bulging portion 2c ′ that bulge outward from 2a2.

The neck 3 is the upper end of the bottle body 1.
The neck 3 is provided with a thread 3b so that the lid (not shown) can be externally screwed. The lid (not shown) is formed in a cap shape, and has a screw groove on the inside so that it can be screwed onto the neck portion 3.
The bottle container of the present embodiment is configured to be in a closed state by screwing the neck portion 3 and the lid, and is configured to be in an open state by releasing the screwing of the neck portion 3 and the lid. Has been.
The neck portion 3 further includes a support ring portion 3c below the screw thread 3b.

The shoulder portion 4 is formed so as to gradually increase in diameter from the lower end of the neck portion 3 to the upper end of the upper surface contact portion 2b and the upper end of the upper bulging portion 2c. That is, the shoulder portion 4 is a cylindrical portion that tapers from the upper end of the upper surface contact portion toward the lower end of the neck portion.
The shoulder 4 has a curved portion 6 that curves toward the outside of the bottle body 1.
Further, the shoulder portion 4 is a portion configured in a substantially quadrangular pyramid shape.
The length of the shoulder 4 in the vertical direction is preferably 1/3 or less of the height of the bottle body 1.

In addition, it is preferable that the curvature radius of the curved part 6 of the said shoulder part 4 is 83 mm or more. In addition, it is preferable that the curvature radius of the curved part 6c (1st curved part 6c) in a side surface is 119 mm or more. Moreover, it is preferable that the curvature radius of the curved part 6b (2nd curved part 6b) in a long side is 87 mm or more.
Furthermore, it is preferable that the horizontal cross-sectional shape of the shoulder portion 4 is an elliptical shape that is almost limitless to a perfect circle. The ratio of the major axis to the minor axis in the horizontal cross-sectional shape of the shoulder 4 is preferably larger than 1.0 and smaller than 1.2, preferably larger than 1.0 and smaller than 1.15.

  Since the bottle container of this embodiment is comprised as mentioned above, it has the following advantages.

  That is, the bottle main body of the bottle container of the present embodiment has a shape in which the long side surfaces come into contact with each other when arranged in an upright state with another bottle main body having the same shape. Thereby, even if the force which is going to bend is applied to a bottle main body, such a bottle container can distribute stress over the whole surface. Therefore, such a bottle container suppresses concentration of stress, and deformation due to a load hardly occurs.

  In the bottle container of this embodiment, the ratio of the length of the shoulder portion to the total length in the direction of the imaginary axis is preferably 0.33 or less, more preferably 0.17 to 0.21. Further, the bottle container of the present embodiment has an elliptical shape in which the horizontal cross section at least above the central portion of the shoulder 4 is infinitely close to a perfect circle in the shoulder 4, so that it depends on the load applied in the vertical direction. There is an advantage that the deformation of the shoulder portion 4 can be further suppressed.

  Further, the body portion 2 bulges outward from the non-projecting portion 2a ′ which is the outer portion of the rib forming portion 2a in the horizontal direction above and below the rib forming portion 2a on the short side surface. By having the upper bulging portion 2c and the lower bulging portion 2c ′, the bottle container according to the present embodiment can be slid from the hand when the portion where the rib is provided is gripped. The upper bulging portion 2c or the lower bulging portion 2c ′ has an advantage that the bottle container can be prevented from slipping and falling. The bottle container according to the present embodiment is peeled off by contact with another bottle container when the label is applied to the rib forming part by the upper bulging part 2c and the lower bulging part 2c ′. It has the advantage that can be prevented. Moreover, the bottle container of this embodiment also has the advantage that it is excellent in design nature by providing the said upper bulging part 2c and the lower bulging part 2c '.

  In addition, although the bottle container of this embodiment has the said advantage by the said structure, the bottle container of this invention is not limited to the structure of the said embodiment. The bottle container of the present invention can be variously modified without departing from the gist of the present invention.

  Next, the present invention will be described more specifically with reference to reference examples, examples and comparative examples.

(Reference Example 1)
Using a polyethylene terephthalate resin, a bottle main body having the same shape as that shown in FIGS. 1 to 4 and having a shoulder portion as shown in FIGS. 5 and 6 (bottle main body height: 336.0 mm, radius of curvature at the short side curved portion: 64.1 mm, the radius of curvature of the curved portion on the long side surface: 78.7 mm, mass: 31 g).
Next, 2.0 L of beverage was packed in the bottle body, the bottle container was covered, and 24 bottle containers containing beverage were produced.
Then, three bottles containing beverages in an upright state were arranged vertically and two horizontally in parallel, and shrink packed with a heat-shrinkable film to produce a bundle. Three more bundles were produced, for a total of four bundles. In addition, the surface contact portions of the bottle container in the vertical direction are in contact with each other.
Next, these bundles are stacked on a single pallet for four days, and the weights obtained by multiplying the two-tiered pallet by 1.5 times the safety factor are multiplied by these bundles for three days. The degree of deformation of the beverage bottle container was visually confirmed, and a deformation test of the beverage bottle container was performed. The results are shown in Table 1.

(Reference Example 2)
A deformation test of a bottle container with a beverage was performed in the same manner as in Reference Example 1 except that the thickness was increased overall (mass was 34 g). The results are shown in Table 1.

(Comparative Example 1)
Reference Example 1 except that a bulging portion that bulges outward from the rib above the rib is provided on the entire circumference of the barrel and that the length of the bottle container is 334 mm. In the same manner as above, a deformation test of a bottle container containing a beverage was performed. The results are shown in Table 1.

As shown in Table 1, the beverage-containing bottle containers of Reference Examples 1 and 2, which are within the scope of the present invention, were not significantly deformed as compared with the beverage-containing bottle container of Comparative Example 1.
Therefore, according to this invention, it turns out that the bottle container which cannot change easily with a load can be provided.

(Example 3)
A bottle body was produced in the same manner as in Reference Example 1 except that the shoulder portion was shaped as shown in FIGS. 7 and 8 (bottle body height: 336.0 mm, curvature radius at the curved portion of the short side surface: 119 mm, long side surface) Radius of curvature at the curved portion of the material: 87.69 mm, mass: 31 g).

Example 4
A bottle main body was produced in the same manner as in Example 3 except that the shoulder portion was shaped as shown in FIGS. 9 and 10 (the height of the bottle main body: 336.0 mm, the radius of curvature at the curved portion on the short side surface: 127.7 mm, The radius of curvature at the curved portion on the long side: 87.7 mm, mass: 31 g).
1 to 4 show the shape of the fourth embodiment.

<Shoulder strength test>
Place the bottle body of Reference Example 1 and Examples 3 and 4 on a buckling test device (for example, Top Load Tester ME-1000), and load the bottle body from the top at a displacement speed of 50 mm / min as an initial setting value. The maximum buckling strength immediately before the shoulder buckled was measured. Then, the ratio of the maximum buckling strength of Examples 3 and 4 to the maximum buckling strength of Reference Example 1 (hereinafter also simply referred to as “strength ratio”) was calculated. The results are shown in Table 2.
In addition, this test was done with respect to the bottle main body which stuck the label on the rib formation part.

  The bottle bodies of Examples 3 and 4 were stronger than the bottle body of Reference Example 1.

  1: bottle body, 2: body part, 2a: rib forming part, 2a1: rib, 2a2: non-projecting part, 2b: upper surface contact part, 2b ': lower surface contact part, 2c: upper bulging part, 2c': lower Swelling part, 3: neck part, 3a: opening, 3b: screw thread, 3c: support ring part, 4: shoulder part, 5: bottom part, 6: bending part, 6c: first bending part, 6b: second bending part

Claims (1)

A bottle container provided with a synthetic resin bottle body,
The bottle body has a cylindrical body with a rectangular column shape,
The horizontal cross-sectional shape of the body is a substantially rectangular shape having a long side and a short side,
The trunk has a long side having the long side and a short side having the short side,
The body portion is provided with a rib forming portion having a rib protruding inside the container at a central portion in the height direction of the bottle body,
The rib is provided in a direction around the trunk,
The body includes an upper surface contact portion and a lower surface that are in surface contact with the other bottle main body at an upper portion and a lower portion than the rib forming portion when the bottle main body is arranged in an upright state with another bottle main body having the same shape. Each has a contact portion,
The virtual plane extending below the upper surface contact portion, the virtual plane extending above the lower surface contact portion, and the outer portion of the rib forming portion are flush with each other,
The bottle body includes a cylindrical neck portion having an opening formed at an upper end, and a cylindrical shoulder portion that tapers from an upper end of the upper surface contact portion toward a lower end of the neck portion,
The shoulder portion has a curved portion that curves toward the outside of the bottle body,
The bottle container whose curvature radius of the above-mentioned curving part is 83 mm or more.

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