JP4869973B2 - Glass bottle - Google Patents

Description

  The present invention relates to a so-called wide-mouth glass bottle suitable for use in medicines, cosmetics, jam products, and the like.

  Glass bottles used for medicine, cosmetics, jam products, etc., as shown in FIG. 5, have a wide mouth 2, a shoulder 3 that continues downward from the mouth 2, and a straight that continues downward from the shoulder 3. A so-called wide-mouthed glass bottle 1 ′ having a body part 5 and a bottom part 6 continuing downward from the straight body part 5 is preferred and used. This is because such a wide-mouthed bottle has a vertical straight body portion, so that the contents can be easily taken out and has a clean bottle shape.

  FIG. 6 is an explanatory diagram of the glass bottle 1 ′ on the production process line. As shown in the figure, the glass bottles 1 'flow in contact with each other on the line. At this time, the vicinity of the shoulder and the bottom of the bottle easily collide (contact point). Thereby, the vicinity of the shoulder portion and the bottom portion of the bottle is scratched, and the glass strength is deteriorated to about ½.

  FIG. 7 is an explanatory diagram when the glass bottle 1 ′ falls down during use. In this case as well, the vicinity of the shoulder serves as a contact point and is easily damaged.

  FIG. 8 is an explanatory diagram when the glass bottle 1 ′ is dropped vertically. Even if the bottle falls vertically and a large impact force acts on the vertical method, the deformation of the bottle is small, so it can be said that the bottle is hard to break and has high strength. FIG. 9 is an explanatory diagram when the glass bottle 1 ′ is dropped sideways. In this case, there is little deformation near the bottom of the bottle, but as shown on the right side of the figure, the deformation is large near the mouth and shoulder, and a large tensile stress is generated on both sides. Therefore, it is not preferable to have a contact point at the mouth or shoulder. FIG. 10 is an explanatory diagram of the bending stress generated in the bottle when the glass bottle 1 ′ is subjected to an impact from the lateral direction, and the darker the portion, the larger the bending stress is generated. As shown in the figure, bending stress is concentrated on the mouth and shoulder. Further, as shown in FIG. 7, even when the bottle falls, a maximum load is generated near the shoulder.

  As described above, the glass strength in the vicinity of the shoulder portion and the bottom portion of the bottle has deteriorated to about ½, but the bottle is easily broken at the shoulder portion where a large stress is generated. This type of wide-mouthed bottle is preferred because the larger the diameter of the mouth portion, the easier the contents can be taken out, but the larger the outer diameter (d3) of the mouth portion relative to the outer diameter (d1) of the straight body portion, The deformation near the shoulder becomes large and it becomes easy to break. This tendency becomes remarkable when d3 / d1 is 0.7 or more.

  The present invention is a wide-mouthed bottle having a mouth portion where d3 / d1 exceeds 0.7, and has a novel shape that is resistant to impact even when a lateral impact is applied to the bottle due to dropping or falling. The challenge was to develop a bottle. In addition, that a bottle breaks also includes that a fine fragment | piece peels in the part to which the impact was added.

The present invention includes a mouth portion, a shoulder portion that continues downward from the mouth portion, a tapered portion that continues downward from the shoulder portion and gradually expands downward, and a straight body portion that continues downward from the tapered portion. And having a hem that continues downward from the straight body,
When the outer diameter of the upper end of the tapered portion is d2, and the outer diameter of the straight body portion is d1,
0.0017d2 ≦ d1-d2 ≦ 0.036d2
When the outer diameter of the mouth is d3,
d3 / d1 ≧ 0.7
When the length of the tapered portion is h2, and the total length of the straight body portion and the tapered portion is h1,
0.2 ≦ h2 / h1 ≦ 0.5
It is a glass bottle characterized by having the following relationship.

  In the present invention, the outer diameter of the mouth is the outer diameter of the upper end of the mouth. The shoulder portion is a portion that is continuously formed downward from the mouth portion, the lower portion gradually increases in diameter, and at least a lower portion thereof is a convex curve outward in the longitudinal section. At the boundary between the shoulder portion and the taper portion, that is, the upper end of the taper portion, a relatively small R (curvature radius) at the lower portion of the shoulder portion in the longitudinal section increases rapidly (that is, at the taper portion, at least R is 10 times or more, R (Including an infinite line). The tapered portion may be a straight line or a gentle curve in the longitudinal section. The straight body portion is a portion that is a vertical straight line in the longitudinal section. The skirt portion is a portion that is continuously formed downward from the straight body portion, and the lower portion gradually decreases in diameter and is connected to the bottom portion.

  It is appropriate that d1-d2 is 0.0017d2-0.035d2. If it is less than 0.0017d2, the effect of preventing the deterioration of the glass strength of the shoulder is small, and if it exceeds 0.036d2, the conventional product image may be damaged, and the label may be wrinkled when the label is applied to the outer periphery of the bottle. is there. A preferable range of d1-d2 is 0.008d2 to 0.035d2, and a more preferable range is 0.01d2 ≦ d1-d2 ≦ 0.018d2. Moreover, as a concrete numerical value of d1-d2, when it is 0.0017d2-0.035d2, when it is 0.008d2-0.035d2, 0.5-2.0 mm, When 0.01d2 ≦ d1-d2 ≦ 0.018d2, it is preferably 0.6 to 1.0 mm.

  h2 / h1 is suitably 0.2 to 0.5. If it is less than 0.2, the maximum stress position (shoulder portion) and the maximum damage position (uppermost portion of the straight body portion) approach each other, and the bottle is easily broken by an impact. If it exceeds 0.5, the inclination angle of the taper portion becomes too small and the shoulder portion is easily damaged, and the effect of preventing the deterioration of the glass strength of the shoulder portion becomes small. Further, a more preferable range of h2 / h1 is 0.2 to 0.35.

  The present invention is directed to a wide-mouth bottle with d3 / d1 ≧ 0.7. When a bottle with d3 / d1 less than 0.7 is subjected to an impact from the side, a large load is applied to the bottle mouth, but the stress generated at the shoulder is reduced and the possibility of breaking is small. It is. Further, it is more preferable that d3 / d1 ≧ 0.85.

  FIG. 3 is an explanatory diagram of the production process line of the glass bottle 1 of the present invention. As shown in the figure, the glass bottles 1 flow in contact with each other on the line, but the glass bottle 1 of the present invention has a taper in which the diameter gradually increases between the shoulder portion 3 and the straight body portion 5. Since the portion 4 is provided, the contact point is near the uppermost portion of the straight body portion 5, and the shoulder portion is not a contact point. Even if the shoulder portions come into contact with each other, the taper portion 4 makes surface contact, so the impact of the shoulder portion is reduced, the shoulder portion 3 is hardly damaged, and the glass strength of the shoulder portion is hardly deteriorated. Therefore, even if a lateral impact is applied to the bottle due to a lateral drop or the like, the bottle is not easily broken, and the glass bottle is strong against impact.

  FIG. 4 is an explanatory diagram when the glass bottle 1 of the present invention falls down during use. Also in this case, the contact point is in the vicinity of the uppermost portion of the straight body portion 5, and the shoulder portion 3 is not a contact point. Further, even if the shoulder portion 3 comes into contact with the support surface, the taper portion 4 makes surface contact, so the impact of the shoulder portion 3 is reduced, the shoulder portion is hardly damaged, and the glass strength of the shoulder portion is not easily deteriorated. . Further, since the maximum load in this case is near the uppermost portion of the straight body portion 5, the bottle is more difficult to break and is resistant to the impact of falling.

  Since the glass bottle of the present invention has a tapered portion where the diameter gradually increases between the shoulder portion and the straight body portion, the shoulder portion does not become a contact point on the production line or when it falls, and the glass strength of the shoulder portion It is hard to deteriorate, and even when a lateral impact is applied to the bottle due to falling or falling sideways, it is hard to break and is strong against impact.

  In addition, the conventional product image is not impaired, and there is no risk of wrinkling of the label when the label is applied to the outer periphery of the bottle.

FIG. 1 is a front view of a glass bottle 1 according to an embodiment. The glass bottle 1 includes a mouth part 2, a shoulder part 3 continuing downward from the mouth part 2, a tapered part 4 continuing downward from the shoulder part 3 and gradually decreasing in diameter, and downward from the taper part 4. It has a continuous straight body part 5, a skirt part 6 that continues downward from the straight body part, and a bottom part 7 that continues from the skirt part. The mouth portion 2 is provided with a thread 8 for engaging the cap. The outer diameter d3 of the mouth portion is 54 mm, the outer diameter d2 of the upper end of the tapered portion 4 is 57.9 mm, and the outer diameter d1 of the straight body portion is 58.5 mm.
The length h2 of the taper part 4 is 14 mm, and the total length h1 of the straight body part 4 and the taper part 4 is 49 mm.
Therefore, d1-d2 = 0.6 mm, d3 / d1 = 0.92, and h2 / h1 = 0.29.

  FIG. 2 is an explanatory diagram of the results of the lateral drop test of the glass bottles 1 and 1 '. The glass bottle 1 of the example and the conventional glass bottle 1 ′ were injured for 2 minutes with a line simulator, filled with the contents (medicine cream), and then packaged in a small box. I dropped it. As a result, the conventional glass bottle 1 ′ was broken in 25 of 30 (83.3%), whereas the glass bottle 1 of the example was broken in 3 of 30 (10%). From this result, it was proved that the glass bottle of the present invention has drastically improved drop / impact strength.

It is a front view of the glass bottle 1 of an Example. It is explanatory drawing of the horizontal drop test result of a glass bottle. It is explanatory drawing of the glass bottle 1 on a production process line. It is explanatory drawing of the glass bottle 1 which fell. It is a front view of the conventional glass bottle 1 '. It is explanatory drawing of the glass bottle 1 'on a production process line. It is explanatory drawing of the fallen glass bottle 1 '. It is explanatory drawing of the glass bottle 1 'which fell vertically. It is explanatory drawing of the glass bottle 1 'which fell sideways. It is explanatory drawing of the bending stress which generate | occur | produces in the glass bottle 1 'which received the impact from the horizontal direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Glass bottle 1 'Glass bottle 2 Mouth part 3 Shoulder part 4 Tapered part 5 Straight trunk part 6 Bottom part 7 Bottom part 8 Thread

Claims (4)

A mouth portion, a shoulder portion continuing downward from the mouth portion, a tapered portion continuing downward from the shoulder portion and gradually expanding downward, a straight body portion continuing downward from the taper portion, and a straight body Having a hem that continues downward from the part,
When the outer diameter of the upper end of the tapered portion is d2, and the outer diameter of the straight body portion is d1,
0.0017d2 ≦ d1-d2 ≦ 0.035d2
When the outer diameter of the mouth is d3,
d3 / d1 ≧ 0.7
When the length of the tapered portion is h2, and the total length of the straight body portion and the tapered portion is h1,
0.2 ≦ h2 / h1 ≦ 0.5
A glass bottle characterized by having the following relationship.   The glass bottle according to claim 1, wherein 0.1 ≦ d 1 −d 2 ≦ 2.0 mm.   2. The glass bottle according to claim 1, wherein 0.008d2 ≦ d1-d2 ≦ 0.035d2.   The glass bottle according to claim 3, wherein 0.5 ≦ d 1 −d 2 ≦ 2.0 mm.