JPH11255226A - Synthetic resin reinforcement panel, and synthetic resin bottle body using same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase strength of a bottle body and to prevent at the same time deformation by collapse of the bottle body having reinforcement ribs and reinforcement panels and the like. SOLUTION: A second reinforcement panel 23 is formed at the lower part 11 of a trunk part 4, and the second reinforcement panel 23 is made up of upper projecting/indented stripes 25, lower projecting/indented stripes 26 and a recessed part 27 extending in the circumferential direction between the upper and the lower projecting/indented stripes 25 and 26. Because of presence of the recessed part 27, the lower part 11 of the trunk part 4 is made flexible, and thereby deformation by collapse of the trunk part 4 arising from decompression or pressurization at the inside of a synthetic resin bottle body or pressing pressure applied by pressurization arising from self-weight of contents is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of synthetic resin reinforced panels formed by blow molding and synthetic resin bottles using the synthetic resin reinforced panels.
In particular, a synthetic resin reinforced panel with increased strength and flexibility, and withstands pressure reduction, bulging pressure, and resistance to a wide range of applications, such as liquid filling of hot fill and cold fill. It belongs to the technical field of synthetic resin bottles having a holding pressure or the like.

[0002]

2. Description of the Related Art In recent years, synthetic resin bottles formed by biaxial stretch blow molding using a saturated polyester resin represented by polyethylene terephthalate have been used for various drinking waters such as juice and mineral water, seasonings, alcoholic beverages and the like. , And other food storage bottles.

By the way, such synthetic resin bottles are:
The body of the synthetic resin bottle is pressurized by the weight of the contents to be filled, or an external force is applied when the synthetic resin bottle filled with the contents is transported, etc., causing elastic deformation. May be done. In the case of a hot fill that fills a high-temperature liquid, filling the high-temperature liquid into a synthetic resin bottle and keeping it plugged keeps the filler in the synthetic resin bottle cool, and In cold fill, where the internal pressure of the bottle decreases and the body pressure of the synthetic resin bottle is pressed by the atmospheric pressure, or the low-temperature liquid is filled into the synthetic resin bottle, the low-temperature liquid is filled with the synthetic resin. When the bottle is filled and kept in a stoppered state, the filling in the synthetic resin bottle is warmed, the internal pressure of the synthetic resin bottle increases, and the body of the synthetic resin bottle is pressurized. Similarly, the body of the synthetic resin bottle is elastically deformed by being pressed.

Therefore, conventionally, for example, Japanese Unexamined Patent Publication No.
As disclosed in Japanese Patent No. 43, several lateral ribs for reinforcement consisting of concave grooves extending in the circumferential direction of the synthetic resin bottle are provided on each surface of the bottle body, The reinforcing panel is provided on each surface of the bottle body to increase the strength of the body and suppress the elastic deformation of the body of the synthetic resin bottle as described above.

[0005]

However, in the synthetic resin bottle disclosed in the above-mentioned publication, the strength of the synthetic resin bottle is improved by the reinforcing ribs and the reinforcing panels.
On the other hand, since there is not much flexibility, these reinforcing ribs and panels are not able to withstand a certain pressure or more due to decompression inside the synthetic resin bottle during hot fill or pressurization inside the synthetic resin bottle during cold fill. In some cases, the original image may not be restored to its original state after being deformed. Also,
When the pressure of the filling in the synthetic resin bottle due to its own weight is applied to a relatively wide flat portion of the body, the reinforcing ribs and the like formed on this flat portion are crushed and similarly not restored. There is.

When the synthetic resin bottle is crushed and deformed so as not to be restored, not only the strength of the synthetic resin bottle is reduced, but also the appearance of the synthetic resin bottle is impaired. However, the commercial value is significantly reduced.

[0007] The present invention has been made in view of such a problem, and its object is to increase the strength while increasing
Moreover, it is an object of the present invention to provide a synthetic resin reinforcing panel capable of preventing crush deformation of a reinforcing rib, a reinforcing panel, and the like, and a synthetic resin bottle using the synthetic resin reinforcing panel.

[0008]

In order to solve the above-mentioned problems, a synthetic resin reinforcing panel according to the first aspect of the present invention comprises an upper-side uneven ridge extending in a longitudinal direction, and a lower part of the upper-side uneven ridge. , And a vertically extending lower portion provided between the lower and upper uneven portions provided on the lower side.

The reinforcing panel made of synthetic resin according to the second aspect of the present invention is characterized in that the upper-side uneven ridges and the lower-side uneven ridges are formed in the same number and vertically arranged.

Further, in the reinforcing panel made of synthetic resin according to the third aspect of the present invention, the upper-side uneven ridge portion and the lower-side uneven ridge portion are formed in a triangular wave shape, and the depth of the concave portion is set to be three-dimensional. It is characterized in that it is set to be deeper than the bottom of the upper and lower side ridges.

Further, the synthetic resin bottle of the invention according to claim 4 is
A mouth portion, a shoulder portion continuing to the mouth portion, a body portion continuing to the shoulder portion, and a bottom portion continuing to the body portion, and these portions are made of a synthetic resin integrally formed of a synthetic resin. In a bottle, the reinforcing panel made of synthetic resin according to any one of claims 1 to 3, wherein the upper and lower side uneven strips extending in the vertical direction extend vertically in a lower portion of the body. It is characterized by being used.

[0012]

In the synthetic resin reinforcing panel of the present invention thus constructed, a horizontally extending recess is formed between the vertically extending upper and lower ridges and the lower ridge. Thus, the synthetic resin reinforcing panel becomes flexible. Even if the synthetic resin reinforcement panel is deformed by applying a pressing force, the flexibility of the synthetic resin reinforcing panel restores the synthetic resin reinforcing panel to its original state when the pressing force is removed. Moreover, the crush deformation of the synthetic resin reinforcing panel is prevented.

Further, in the synthetic resin bottle of the present invention, such a synthetic resin reinforcing panel is used at the lower part of the body, so that the body of the synthetic resin bottle has flexibility. Become. Thus, even if the inside of the synthetic resin bottle is depressurized or pressurized due to the temperature change of the filling by hot fill or cold fill and the body is deformed, the flexibility of the body makes the synthetic resin bottle flexible. When the decompression or pressurization inside the body is released, the torso is restored to its original state, and the torso is prevented from being deformed.

Further, since the reinforcing panel made of the synthetic resin is formed at the lower portion of the body, the strength is improved, so that the deformation of the body due to the pressurization based on the weight of the filler is prevented. Become.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an example of an embodiment of a synthetic resin bottle according to the present invention, FIG. 2 is a left side view of this example, and FIG. 3 is a plan view.

As shown in FIGS. 1 and 2, the synthetic resin bottle 1 of this embodiment has a mouth portion 2, a shoulder portion 3 continuing from the mouth portion 2, and a body portion continuing from the shoulder portion 3. 4 and a bottom portion 6 which is continuous from the body portion 4 via a lateral rib 5, and these portions are integrally formed by blow molding using a plastic such as polyethylene terephthalate.

The mouth portion 2 is formed in a cylindrical shape similarly to the conventional synthetic resin bottle 1, and has an outer peripheral surface on which an external thread into which a cap (not shown) for closing the opening end of the mouth portion 2 is screwed. 7 are formed. The shoulder 3 is formed in an inverted funnel shape as a whole, and includes an upper portion 8 and a lower portion 9. As shown in FIG. 3, the upper part 10 is formed in the shape of a truncated pyramid of a regular dodecagon, and the lower part 9 is formed in the upper part 10 of the body part 4 which is formed in a rectangular shape in which four corners to be described later are largely chamfered. Are bent along the lines connecting the corners of the shoulder portion 3 and the regular dodecagonal corner of the upper portion 8 of the shoulder 3.

Further, the body 4 includes an upper part 10, a lower part 11,
A circumferential rib 12 extending in the circumferential direction is formed between the upper part 10 and the lower part 11 at substantially the center of the body 4. As shown in FIG. 3, the upper part 10 and the lower part 11
The cross-sections of these outer shapes are formed in a rectangular shape with four corners chamfered relatively large, in which case the outer dimensions of the upper part 10 are set slightly smaller than the outer dimensions of the lower part 11. Although not shown, the outer shape of the horizontal rib 12 is also formed in a rectangular shape with a relatively large chamfered corner, similarly to the upper part 10 and the lower part 11.

The upper part 10 has V extending in the circumferential direction.
Four transverse ribs 13, 14, 15,
1 and 2 are formed at predetermined intervals in the vertical direction in FIGS.

These lateral ribs 13, 14, 15, 16
Although each of them extends in the circumferential direction, it is not formed over the entire circumference of the upper portion 10, but is formed at the central portion of the left side surface which is the short side of the rectangular upper portion 10 as shown in FIG. Absent. That is, the lateral ribs 13, 14, 15, 1
6 are provided with crush prevention rib portions 17, 18, 19, and 20 formed of discontinuous portions without ribs at the center of the left side surface of the upper portion 10, respectively. These crush prevention ribs 17, 18, 1
9 and 20 are formed not only on the left side surface of the upper portion 10 shown in FIG. 2 but also on the right side surface of the upper portion 10 not shown but facing the left side surface. By these crush prevention rib portions 17, 18, 19, and 20, the left and right side surfaces of the upper portion 10 of the synthetic resin bottle 1 have flexibility,
The left and right sides of the synthetic resin bottle 1 do not easily collapse.

As shown in FIG. 1, a first reinforcing panel 21 composed of an elliptical concave portion having a long axis in the vertical direction is provided at the center of the front surface of the upper part 10 on the long side. ,
It is formed so as to be continuous with 15,16. Although not shown, the first reinforcing panel 21 is similarly formed at the center of the back surface facing the front surface of the upper portion 10.

The first reinforcing panel 21 is gradually and continuously depressed from the periphery to the center thereof.
It is set in the most concave state at the center. And 4
Of the lateral ribs 13, 14, 15, 16 at the formation positions of the lateral ribs 13, 16 at the uppermost position and the lowermost position, the depth of the concave grooves of the lateral ribs 13, 16 is larger. First
It is deeper than the depth of the reinforcing panel 21, so that the lateral ribs 13, 16 are also formed continuously in the area where the first reinforcing panel 21 is formed. Further, among the four lateral ribs 13, 14, 15, 16 at the formation positions of the lateral ribs 14, 15 at the second and third positions from the top, the depth of the first reinforcing panel 21 is The depth is larger than the depth of the concave grooves of the lateral ribs 14 and 15. Therefore, while the depth of the concave grooves of the lateral ribs 14 and 15 is deeper than the depth of the first reinforcing panel 21 from the edge of the first reinforcing panel 21 toward the center, the depth of the lateral ribs 14 and 15 is as described above. And the depth of the first reinforcing panel 21 is smaller than that of the horizontal ribs 13 and 16.
In the region deeper than the depth of the concave groove, the lateral ribs 14,
15 has completely disappeared.

By providing the first reinforcing panel 21 which is gradually deeper and is continuous with the lateral ribs, when the synthetic resin bottle 1 is held or when the bottle 1
When a vertical force is applied to the reinforcing panel installation surface of the bottle body 1 during the transportation of the
The edge force (concentrated load), which has conventionally occurred at the corner between the outer surface of the upper part 10 and the reinforcing panel, is not generated, and as a result, the deformation of the synthetic resin bottle 1 due to the vertical force is prevented. Become like Also, the first reinforcing panel 2
Since the finger such as the thumb holding the synthetic resin bottle 1 comes to fit into the recess 1 accurately, the synthetic resin bottle 1
When the liquid in the inside is poured out, the liquid can be poured out in a stable state.

Above the first reinforcing panel 21, a reinforcing rib 22 extending in the circumferential direction is formed, and the horizontal rib 22 reinforces a plane portion above the first reinforcing panel 21. Is difficult to deform.

Further, as shown in FIGS. 1 and 2, second and third reinforcing panels 23 and 24 are formed on the front and left sides of the lower portion 11 of the body 4, respectively. Although not shown, these second and third reinforcing panels 23 and 24 are also formed on the rear surface and the right side surface of the lower portion 11, respectively. The second reinforcement panel 23 is
As shown in FIG. 5, the lower part 11 is formed in a rectangular shape that is concave from the outer surface and has rounded corners as a whole. The second reinforcing panel 23 includes an upper-side uneven strip 25.
And the lower side uneven ridges 26 and the upper and lower side uneven ridges 2
5, 26, and a recess 27 extending in the circumferential direction.

The upper-side uneven strip 25 has a predetermined number of uneven strips extending in the vertical direction and repeatedly arranged in the circumferential direction. As shown in FIG. The cross-sectional shape is formed as a triangular waveform panel.

The depth η of the concave portions of these concave and convex strips is
The thickness of 1 is 0.3 mm, the entire circumference of the lower part 11 is 385 mm,
The circumferential length of the flat part on the long side of the lower part 11 is 75.38 m
m, the circumferential length of the flat portion on the short side of the lower portion 11 is 52.8.
6 mm, when the vertical length of the lower part 11 is 99 mm, preferably about 2 mm to 10 mm from the outer surface of the lower part 11,
Desirably, it is 2 mm to 5 mm. In addition, the depth κ of the convex portion of the concave and convex strips is preferably about 0.2 mm to 8 mm from the outer surface of the lower part 11, and more preferably 0.5 mm to 3 mm. Further, the width (ie, the pitch of the triangular wave) λ of one uneven stripe is preferably about 2 to 10 mm, and more preferably 3 to 6 mm. Further, the angle θ of the triangular wave of the uneven stripe is preferably about 20 ° to 120 °, and more preferably 30 ° to 90 °. These numerical values depend on the characteristics of the material of the bottle, are values obtained from empirical values in tests, and are absolute values not related to the size of the bottle.

The lower-side uneven ridge 26 is formed by the upper-side uneven ridge 2.
5 is formed symmetrically in the up-down direction, and the only difference is that the unevenness is formed in the same number as the unevenness of the upper-side uneven streak 25 and aligned in the vertical direction. Since they are formed in exactly the same way, the description is omitted.

The concave portion 27 is formed as a truncated pyramid-shaped concave portion having a rectangular cross section whose cross section becomes smaller as it becomes deeper, and as shown in FIG. And is formed deepest among the second reinforcement panels 23.

The width μ of the recess 27 is 2 mm to 10 m.
m and preferably 3 mm to 7 mm. The depth ν of the concave portion of the concave portion 27 from the outer surface of the lower portion 11 is:
About 2.2 mm to 15 mm is preferable, and preferably 2.5 mm
13 mm is preferable, but at least the depth ν needs to be set to be deeper than the depth η of the concave portion of the upper side uneven ridge portion 25,
In this case, the depth の of the concave portion of the concave portion 27 from the depth of the concave portion of the upper-side concave / convex stripe portion 25 is preferably about 0.2 mm to 5 mm, and more preferably 0.5 mm to 3 mm (that is, 0.5 mm to 3 mm).
ν = η + ξ). These numerical values are also based on the characteristics of the material of the bottle and are values obtained from empirical values in tests.
This is an absolute value that does not depend on the size of the bottle.

As shown in FIG. 2, the third reinforcing panel 24 formed on the left and right side surfaces of the synthetic resin bottle 1 has an upper part 28 and a second reinforcing panel 23, as shown in FIG.
It is composed of a lower portion 29 and a lateral rib 30 and is formed in exactly the same manner as the second reinforcing panel 23 except that the circumferential length is shorter than the second reinforcing panel 23 and the number of the uneven strips is small. Therefore, the description is omitted.

Thus, the second and third reinforcing panels 2
By providing 3, 24, one concave portion 27 is formed between the upper-side uneven ridge portion 25 and the lower-side uneven ridge portion 26, so that the lower portion 11 of the body portion 4 is formed in the synthetic resin bottle body 1. It becomes flexible to reduced pressure and increased pressure. This prevents the lower portion 11 of the body 4 from being stiffened by being reinforced by the upper-side uneven ridges 25 and the lower-side uneven ridges 26, and the lower portion 11 is formed in the synthetic resin bottle 1 by the concave portions 27. In order to have flexibility against decompression and pressurization, it is difficult to crush, and crushing of the body 4 due to a certain or more pressing force can be more reliably prevented as compared with a conventional synthetic resin bottle. Become. The recess 27 also functions as a lateral rib.

In the lower portion 11 of the body 4, the pressure due to the weight of the contents of the synthetic resin bottle 1 is high, but the pressing force due to this pressure increases from the inside of the synthetic resin bottle 1 to the outside. The second and third reinforcing panels 23, 24 can prevent the lower portion 11 from being deformed by bulging as in the case of a conventional synthetic resin bottle.

Further, on the front and left sides of the lower part 11,
Reinforcement ribs 31 and 32 extending in the circumferential direction, respectively, are formed. Although not shown, these reinforcing ribs 31 and 32 are also formed on the back and right sides of the synthetic resin bottle 1 respectively. By these reinforcing ribs 31 and 32, the second
In addition, a portion between the second reinforcing panels 23 and 24 and the lateral rib 12 is reinforced, and this portion is not easily deformed.

In addition, the lateral ribs 12 are shown in FIGS.
As shown in the figure, the upper slope 10 side wall 12a, the lower slope 11 side slope wall 12b, and both slope sidewalls 12a, 1
2b and a bottom portion 12c, and a cross section is formed in a trapezoidal concave portion, and is formed on the entire circumference of the synthetic resin bottle 1. The bottom 1 of the recess of this lateral rib 12
2c, crush prevention ribs 33 and 34 are formed at the center of each of the front and left sides of the synthetic resin bottle 1 in the form of a widened portion whose width is gradually increased. The crush prevention ribs 33 and 34 make the synthetic resin bottle 1 flexible with respect to the holding pressure of the synthetic resin bottle 1, and when the synthetic resin bottle 1 is held, the center of the synthetic resin bottle 1 is The portion exerts its flexibility against the holding pressure and is hardly crushed, and the center portion of the body portion 4 which is most easily deformed can be more reliably prevented from being crushed as compared with the conventional synthetic resin bottle. I have.

In the above-described example, the synthetic resin reinforcing panel of the present invention is used for a synthetic resin bottle. However, the synthetic resin reinforcing panel of the present invention is not limited to this bottle, as described above. The present invention can be applied to any reinforcing panel made of a synthetic resin to which a great external force is applied.

[0037]

As is clear from the above description, according to the synthetic resin reinforcing panel of the present invention, the recess extending in the lateral direction between the upper and lower uneven ridges extending in the vertical direction. Is formed, it is possible to give flexibility to the synthetic resin reinforcing panel. Therefore, even if the synthetic resin reinforcing panel is deformed by applying a pressing force, the synthetic resin reinforcing panel can be prevented from being crushed and deformed by the flexibility of the synthetic resin reinforcing panel.

According to the synthetic resin bottle of the present invention,
Since such a synthetic resin reinforcing panel is used in the lower part of the body, the body of the synthetic resin bottle can be made flexible. By this, the temperature change of the filling by hot fill or cold fill,
Even if the inside of the synthetic resin bottle is depressurized or pressurized and the body is deformed, the flexibility of the body will eliminate the decompression or pressurization inside the synthetic resin bottle, and the body will be deformed. Can be restored to its original state, and the deformation of the trunk can be prevented.

Furthermore, by using the synthetic resin reinforcing panel at the lower part of the body, the strength is improved, and the deformation of the body due to the pressurization based on the weight of the filler can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of a synthetic resin bottle according to the present invention. FIG. 2 is a left side view of this example,
FIG. 3 is a plan view.

FIG. 2 is a left side view of the synthetic resin bottle of the example shown in FIG.

FIG. 3 is a plan view of the synthetic resin bottle of the example shown in FIG.

4 shows a second reinforcing panel of the synthetic resin bottle of the example shown in FIG. 1, wherein (a) is a cross-sectional view along the line IVA-IVA in FIG. 1, and (b) is a line IVB-IVB in FIG. FIG.

FIG. 5 is a sectional view taken along line VV in FIG. 2;

[Explanation of symbols]

1 ... synthetic resin bottle, 2 ... mouth, 3 ... shoulder, 4 ... trunk,
5 horizontal rib, 6 bottom, 10 top, 11 bottom
21 ... first reinforcement panel, 23 ... second reinforcement panel, 24 ...
Third reinforcing panel, 25, 28 ... upper side uneven strip, 26, 2
9 ... lower side uneven strip, 27, 30 ... recess

Claims (4)

[Claims] 1. A vertically extending upper and lower ridge portion, a vertically extending lower and lower ridge portion provided below the upper and lower ridge portion, and a portion between the upper and lower lower ridge portions. And a laterally extending recess provided in the reinforcing panel. 2. The synthetic resin reinforcing panel according to claim 1, wherein the upper-side uneven ridges and the lower-side uneven ridges are formed in the same number and vertically arranged. 3. The upper-side irregularities and the lower-side irregularities are formed in a triangular wave shape, and the depth of the concave portion is greater than the bottom of the lower-side irregularities. 2. The method according to claim 1, wherein
Or the synthetic resin reinforcement panel according to 2. 4. A mouth, a shoulder connected to the mouth, a body connected to the shoulder, and a bottom connected to the body, each of which is integrally formed of synthetic resin. The synthetic resin bottle body according to any one of claims 1 to 3, wherein the synthetic resin reinforcing panel according to any one of claims 1 to 3 is provided on a lower portion of the body portion, the upper portion extending in the longitudinal direction,
A synthetic resin bottle characterized in that both of the lower concave and convex portions are used so as to extend in a vertical direction.