JP5274510B2 - Recess bottle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form a shatter-proof structure of an upper contact portion of a recess bottle to enhance the impact rigidity of the bottle, and to further reduce the weight of the bottle. <P>SOLUTION: In the upper contact portion positioned between a recess upper part and a shoulder with a convex curved longitudinal section and having a linear longitudinal section of the recess bottle having a recess formed at a bottle barrel, an upper end radius R1 of the outer face of the upper contact portion is set smaller than a lower end radius R2 by 0.03-0.15 mm. Thus, the impact rigidity of the upper contact portion is improved so as to prevent cracks of the bottle. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a glass bottle having a recess (concave portion) for attaching a label to the entire circumference of a body portion.

  A recess bottle having a recess is used on the entire circumference of the trunk. By attaching the label to the recess, there is an advantage that the label is not damaged even if the bottles collide when transporting the bottle.

  As shown in FIG. 1, the recess bottle 1 has a recess recessed in the body portion, and the upper portion thereof is an upper contact portion 3 and the lower portion is a lower contact portion 4. The upper contact portion 3 and the lower contact portion 4 are both surfaces having vertical cross sections, and the recess 2 is usually recessed by 0.2 to 0.3 mm from the upper contact portion 3 and the lower contact portion 4. The upper part of the upper contact part 3 has a convex curve in the cross section, the shoulder part 5 gradually decreases in diameter toward the neck part, and the lower part of the lower contact part 4 has a convex curve in the cross section and gradually contracts toward the bottom part. It becomes the skirt part 6 which is diameter.

When the recess bottles collide with each other, the upper contact portion 3 and the lower contact portion 4 of each bottle come into contact with each other and the recesses do not come into contact with each other, so that the label is not damaged.
Such recess bottles are disclosed in, for example, the following patent documents.

Japanese Utility Model Publication No. 62-11710 Japanese Utility Model Publication No. 57-169615

In recent years, weight reduction of glass bottles has been promoted. Lighter bottles, not only can reduce the raw material and fuel, and transportation costs down, can contribute greatly to reducing CO ₂ emissions.
When the bottle is lightened, the glass thickness is reduced and the strength is reduced. In an ordinary bottle having no recess, when the bottles collide with each other, the entire body having the maximum diameter comes into contact with each other, and the contact area is large, so that the stress is dispersed. In the case of a recess bottle, the upper contact portion 3 and the lower contact portion 4 are in contact with each other, and the recess portion is not in contact.

The strength when the bottles collide with each other is measured based on JIS Z 0205 (packed cargo and container inclined impact test method) or with a slight modification.
As shown schematically in FIG. 8, this is because gravity is applied to a pulley 12 on which a sample 14 (a carton filled with a bottle) is placed on a rail 11 installed with an inclination angle (about 10 °). It is made to slide and collide with the hard plate 13. For example, starting from a sliding distance of 30 cm, continuing while increasing the sliding distance at intervals of 10 cm, and using the sliding distance when the bottle breaks as the strength of the bottle.

In the case of a recess bottle, the stress generated in the upper contact portion is generally larger than that in the lower contact portion, and bottle cracking occurs in the upper contact portion.
FIG. 6 shows the side surface shape of the upper contact portion of a conventional recess bottle, where point A is the upper end and point B is the lower end. The bottle radii at points A and B are the same.
FIG. 7 is a comparison of strengths (calculated values) when the same impact is applied to points A and B. Line A shows the strength of point A, line B shows the strength of point B, and point A (upper end) is The strength is about 30% smaller than point B (lower end).

  In the impact test of FIG. 8, the bottles do not always collide in parallel, but rather often collide with a slight inclination due to the inertia at the time of impact. FIG. 9 shows a state in which the right bottle collides with the left bottle at an angle of 5 °. In this case, the collision part C is near the point A at the top of the upper contact part 3. Since the point A has a lower impact strength than the point B, in such a case, cracking is likely to occur particularly in the upper contact portion.

  It is an object of the present invention to provide a structure in which the upper contact portion of the recess bottle is difficult to break and to increase the impact strength of the bottle, thereby enabling further lightening (thinning) of the glass bottle.

The invention, of the recess bottle recess is formed in the bottle body portion, the upper contact portion of the linearly longitudinal section be between shoulders of vertical section convex curves recessed top, the width L of the upper contact portion The recess is characterized in that the upper end radius R1 of the outer surface of the upper contact portion is 5 to 10 mm smaller than the lower end radius R2 by 0.03 to 0.15 mm.

  The recess bottle of the present invention is the structure that is most easily broken when the bottles collide with each other, and the contact part is hard to break, so the impact strength of the recess bottle is improved, and as a result, the bottle can be further reduced in weight. .

It is a side view of a recess bottle. It is a principal part schematic side view of the recess bottle of an Example. It is explanatory drawing when the recess bottle of an Example collides. It is explanatory drawing of the relationship between impact strength and impact width. It is explanatory drawing of the relationship between the deformation | transformation at the time of a bottle collision, and an impact width. It is a principal part schematic side view of the conventional recess bottle. It is explanatory drawing of the impact strength of an upper contact part. It is explanatory drawing of an impact test method. It is explanatory drawing when the conventional recess bottle collides.

FIG. 2 is a partial side view of the recess bottle in the vicinity of the upper contact portion 3 of the embodiment. The bottle has an internal volume of 500 ml, a maximum diameter of 72 mm, and a height of 190 mm.
An upper contact portion 3 having a linear longitudinal section is formed on the upper portion of the recess 2, and the upper portion thereof is a curved shoulder portion 5 having a convex longitudinal section. In the upper contact portion 3, the radius R1 at the upper point A is 0.03 to 0.15 mm smaller than the radius R2 at the lower point B. The radius of B point and the lower contact part 4 is 36 mm.
An appropriate width of the upper contact portion 3 is about 5 to 10 mm.

FIG. 3 shows a state where the recess bottle of the embodiment collides in a state where the recess bottle is inclined by 5 °. Thus, the collision part C is near the lower point B of the upper contact part 3. As described with reference to FIG. 7, the impact strength at point B is greater than that at point A, so that the bottle is less likely to break compared to the conventional case of FIG.
When R2-R1 is smaller than 0.03 mm, the collision portion approaches point A (becomes above the middle between points A and B), and the effect of improving impact strength is reduced.

FIG. 4 shows the relationship between the impact width and the impact strength obtained by computer simulation. The impact width is the width that contacts when the bottles collide. Even if the surfaces that contact each other are inclined with respect to each other, they collide with a certain width by the deformation of the glass at the collision portion.
The wider the impact width, the greater the impact strength. About 3 times in 2 mm width, about 4.7 times in 3 mm width, about 6.4 times in 4 mm width, and about 8.2 times in 5 mm width, with respect to strength at point impact (0.5 mm width) It becomes strength. For this reason, it is preferable that the impact width is 2 to 3 mm or more, so that the impact strength is 3 to 4.7 times that of a point impact, and the impact strength is remarkably improved.
In the recess bottle of the present invention, the impact width becomes the smallest when the bottles collide in a parallel state as shown on the right side of FIG.

If the bottles collide in parallel and the B points of both bottles touch each other, the bottle will deform. FIG. 5 shows a computer simulation of the amount of deformation of the bottle when an impact is applied with an impact width with point B as the lower end (when the thickness of the part is 1.4 mm and the sliding distance is 60 cm), as shown on the right side of FIG. It is what I asked for. The vertical axis is the difference in deformation amount between point A and point B (ΔR2−ΔR1 where the deformation amount at point A is ΔR1 and the deformation amount at point B is ΔR2), and the horizontal axis is the impact width.
The impact width becomes wider as R2-R1 is smaller and the width L of the upper contact portion is larger.
Impact width = (ΔR2−ΔR1) L / (R2−R1)... Formula (1)
The relationship holds.
Further, from the graph shown in FIG.
(ΔR2−ΔR1) = − 0.01 × impact width + 0.094 (2)
When (ΔR2−ΔR1) is deleted from the equations (1) and (2),
Impact width = [0.094L / (R2-R1)] / [1 + 0.01L / (R2-R1)]
It becomes.
When R2-R1 is 0.15 mm and L is 5 mm, the impact width is 2.35 mm. From the graph of FIG. 4, the point impact strength (impact width 0.5 mm) is about four times, and R2-R1 is set to 0.2. When 15 mm and L are 10 mm, the impact width is 3.76 mm, which is a sufficient impact strength of about 6 times the point impact strength.
Therefore, the difference R2-R1 between the lower end radius R2 and the upper end radius R1 of the upper contact portion is suitably 0.03 to 0.15 mm.

As shown in FIG. 8, impact is exerted on each of the five-cartons of the recess bottle of the embodiment of R2-R1 = 0.05 mm and L = 8 mm and the conventional recess bottle (comparative example) of R2-R1 = 0 mm and L = 8 mm as shown in FIG. The strength was measured. The results are shown in Table 1. The examples and comparative examples differ only in the relationship between R2 and R1, and the others are substantially the same.
The recess bottle of the example has a minimum value of about 1.8 times or more as compared with the conventional recess bottle, and it was proved that the impact strength of the recess bottle of the present invention is excellent. However, since the maximum run distance of the test was 100 cm, the impact strength of those that passed this was 110 cm.

DESCRIPTION OF SYMBOLS 1 Recess bottle 2 Recess 3 Upper contact part 4 Lower contact part 5 Shoulder part 6 Bottom part 11 Rail 12 Pulley 13 Hard board 14 Free sample

Claims (1)

In a recess bottle with a recess formed in the bottle body, the upper part of the recess is between the upper part of the recess and the shoulder part of the convex curve and the longitudinal section is linear, and the width L of the upper contact part is 5 to 10 mm. There, the upper end radius R1 of the upper contact portion outer surface, recesses bottle, characterized in that 0.03~0.15mm smaller than the lower end radius R2.

Images