JP2002225834A - Thin-wall blow bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blow bottle having a reinforced bottom achieved by improving, for reinforcement, the form of the bottle of a conventional blow bottle, so that the wall thereof can be made thinner than that of the conven tional bottle for further easier squashing property and stable upstanding property of the bottle at the time filled with contents. SOLUTION: The bottle is characterized in that it is a flat bottle constituted of a mouth part, a body part and a bottom part, comprised of a bottom periphery wall adjacent to the body and a bottom wall, with the bottom periphery wall formed with a front and a back wall slightly tilted and a right and a left wall tilted at a given angle, with a transverse rib disposed at the lower end part of the bottom periphery wall so as to go therearound, with the lower side wall of the transverse rib formed to be approximately vertical at the locations of the right and left walls.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin blow bottle, and more particularly to a bottom portion of a thin blow bottle which can be crushed.

[0002]

In recent years, thinning of bottles has been required in order to save plastic molding materials. Also, when plastics are reused, thin-walled bottles that can be crushed and discarded by hand in order to increase the efficiency of transporting the waste bottles are well known.

However, when the bottle is made thin, the peripheral edge of the bottom wall of the bottle is continuous with the body wall, so that the peripheral wall of the bottom of the bottle becomes thin with the thickness of the body wall, and the peripheral wall of the bottle bottom is dropped. At times, there is a problem that deformation or cracks occur due to impact, and there is a limit even if the bottom peripheral wall is made thin.

A conventional thin bottle is, for example, in the case of PP,
The resin weight per unit capacity was 0.065 g / ml. However, when the resin weight was further reduced and the resin weight was reduced to 0.05 g / ml or less, reinforcing ribs must be placed at required locations on the body and bottom to reinforce. For example, there is a problem that it is difficult to maintain the shape retention as a bottle, and in particular, the peripheral wall of the bottom of the bottle becomes thinner, which often causes deformation and cracks due to impact when the bottle falls, and furthermore, the bottom of the bottle Buckling strength is also reduced. Therefore, buckling may occur on the peripheral wall at the bottom of the bottle at the time of filling the content liquid, and there has been a problem that the upright stability of the container cannot be ensured.

An object of the present invention is to solve the above-mentioned problems by improving the shape of the bottom of a conventional blow bottle to reinforce it, and to further reduce the wall thickness so that it can be easily crushed. An object of the present invention is to provide a blow bottle having a reinforced bottom in order to maintain the upright stability of the bottle when filling the content liquid.

[0006]

The object of the present invention is to form a bottom of a bottle from a bottom wall and an inclined bottom peripheral wall, and make the lower end of the inclined bottom peripheral wall smaller in diameter than the upper end, that is, the body peripheral wall,
By lowering the blow ratio according to the inclination angle, blow molding so that the lower end of the bottom peripheral wall is thicker than the trunk peripheral wall, and by arranging a reinforcing part with a vertical part at the lower end of the peripheral wall at the bottom of the bottle Will be resolved.

[0007] As a specific configuration for solving the above-mentioned problem, a thin flat blow bottle is a flat bottle having a mouth, a body, and a bottom, and the bottom is a bottom peripheral wall and a bottom wall following the body. The bottom peripheral wall is formed from front and rear walls that are slightly inclined and left and right side walls that are inclined at a certain angle, and horizontal ribs are provided at the lower end of the bottom peripheral wall so as to surround the bottom peripheral wall. In the left and right side wall portions, the lower wall of the horizontal rib is formed to be substantially vertical.

[0008] As a circular thin blow bottle, it is a circular bottle comprising a mouth, a body and a bottom, wherein the bottom comprises a bottom peripheral wall and a bottom wall following the body, and the bottom peripheral wall is formed at a constant angle. A horizontal rib is provided at the lower end of the bottom peripheral wall so as to surround the peripheral wall, and a lower wall of the horizontal rib is formed to be substantially vertical.

A flat thin-walled blow bottle according to an embodiment in which the shape of the reinforcing portion is changed is a flat bottle having a mouth, a body, and a bottom, and the bottom has a bottom peripheral wall and a bottom wall following the body. The recesses are arranged at regular intervals on the left and right side walls of the bottom peripheral wall, and the lower wall of the recess is located at the lower end of the bottom peripheral wall and is formed so as to be substantially vertical. adopt.

[0010] Similarly, the circular thin blow bottle of the embodiment is a circular bottle having a mouth, a body, and a bottom, wherein the bottom is composed of a bottom peripheral wall and a bottom wall following the body, and the bottom peripheral wall is provided. Arrange recesses at equal intervals around the entire circumference of
The lower wall of the recess is located at the lower end of the bottom peripheral wall and is formed substantially vertically.

Here, the inclination of the bottom peripheral wall at a constant angle means:
The inclination angle required to make the thickness of the lower end portion of the bottom peripheral wall thicker than the upper end portion, that is, the thickness of the trunk portion by a certain amount, and the inclination angle is determined by the required thickness of the trunk portion and the periphery of the bottom wall. It is set from the wall thickness.

[0012]

Next, a first embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, A
Is a thin flat blow bottle formed by direct blow, comprising a mouth portion 1, a shoulder portion 2, a body portion 3, and a bottom portion 4. PE, PP, and other synthetic resins are used as a material resin. Blow molded as layers or laminates.

The mouth portion 1 comprises an upper mouth portion 5, a grip ring 6 located at an intermediate portion of the mouth portion, and a lower mouth portion 7 continuing from below to a shoulder portion. On the outer peripheral surface of the upper barrel section 5,
A screw 8 is provided, and the outer peripheral surface of the grip ring 6 protrudes from the upper barrel portion 5 and the lower barrel portion 7 of the mouth portion 1, and a knurl 9 is engraved on a part or the entire circumference of the outer circumferential surface. I have. The lower mouth portion 7 has a height enough to allow a finger to be inserted and to hold the bottle A, and its outer periphery is larger in diameter than the upper mouth portion 5 and continues to the shoulder portion 2.

A step 10 is formed between the shoulder 2 and the body 3, and as shown in FIG. 3, the cross section of the lower part of the shoulder 2 and the body 3 has an elliptical front and rear surface and a flat surface on both sides. Flat section 1
It is 1. On the front and rear wall surfaces 12 of the body 3, concave grooves 13 extending in the horizontal direction are arranged at equal intervals in the vertical direction, so that the front and rear wall surfaces 12 become wavy wall surfaces waving in the vertical direction. ing. Front and rear wall surfaces 1 at the left and right ends of the groove 13
An end portion 14 of the second elliptical surface extends in the up-down direction.

The left and right side wall surfaces 15 intersect with the end portions 14 of the front and rear wall surfaces 12 at a fixed angle, and a plurality of recesses 16 are arranged on the surface of the side wall surface 15 at equal intervals. Torso 3
At the lower end portion, a bulging peripheral wall 17 having a step with the upper portion is provided.
Are provided and continue to the bottom 4.

The front and rear wall surfaces 12 are provided with concave grooves 13 extending in the lateral direction.
The intersection line between the front and rear wall surfaces 12 and the side wall surface 15 functions as a vertical rib as a reinforcing rib, and a plurality of recesses 16 are arranged at equal intervals on the side wall surface 15 surface. The stiffness and buckling strength of the body 3 are improved.

As shown in FIGS. 1, 2, and 4, the bottom portion 4 is composed of a bottom peripheral wall 18 and a bottom wall 19 following the bulging peripheral wall 17 of the body portion 3, and the bottom peripheral wall 18 is slightly inclined. And the right and left side walls 21 inclined at a predetermined angle. As shown in FIG. 4, the difference between the lower end 21 a of the inclined side wall 21 and the lower end 20 a of the front and rear walls 20 from the center of the bottle is made as small as possible, so that they are almost the same.

In other words, the ground bottom end wall 19a of the bottom wall 19
The outer periphery is an ellipse having a small difference between the major axis and the minor axis. The upper end of the side wall 21 is in contact with the side wall surface 15 of the major axis of the flat body, and the lower end is in contact with the bottom wall 19 having an outer diameter shorter than the major axis of the flat body. It is inclined so as to be connected to the outer periphery of the bottom end wall 19a. Thereby, the outer diameter of the lower end portion 21a of the side wall 21 is made smaller than the outer diameter of the upper end portion, that is, the elliptical major diameter of the flat body portion, and blow molding is performed so as to reduce the blow ratio according to the inclination angle,
As shown in FIG. 5, the thickness t1 of the lower end portion 21a is
5 is greater than the thickness t2. The inclination angle is set based on the required thickness of the body and the thickness of the periphery of the bottom wall.

At the lower end of the bottom peripheral wall 18, a horizontal rib 22 is provided over the entire circumference, and the lower side of the horizontal rib 22 is a grounding bottom of the bottom wall 19 having a curved surface 23 with a central portion recessed upward. End wall 19
a. As shown in FIG. 5, the lateral ribs 22
It has a concave groove shape formed by the upper side wall 22a and the lower side wall 22b, and the connecting portion between the upper and lower two side walls of the horizontal rib 22 and the connecting portion between each side wall 22a, 22b and the bottom peripheral wall 18 are connected by an arc. Have been.

In the part of the side wall 21, the lower side wall 22b becomes substantially vertical and the upper side wall 22b is related to the inclination angle of the side wall 21.
a is formed to be slightly inclined.

Next, the operation and effect based on the configuration of the bottom will be described. The bottom peripheral wall 18 is formed by a slightly inclined front and rear wall 20 and left and right side walls 21 inclined at a fixed angle.
As shown in the figure, the thickness t1 of the lower end 21a of the side wall 21 is larger than the thickness t2 of the side wall surface 15. Thereby, the bottom peripheral wall 18 is strengthened and the strength against a drop impact is improved.

Further, in the portion of the side wall 21, the lower side wall 22b of the horizontal rib 22 is substantially vertical,
2 is near the grounding bottom end wall 19a of the bottom wall 19 and the wall thickness is large, so that the bending strength of the bottom peripheral wall 18 of the bottom 4 is significantly enhanced. When this was compared with a wall surface having no ribs on the bottom peripheral wall 18, it was found that the buckling strength increased by about 25%.

When the weight of the resin is small and the thickness of the bottom of the bottle becomes thin, the weight on the bottle deforms the bottom wall together with the peripheral wall as shown in FIG. In this case, the lower side wall of the horizontal rib acts to push down the lower end portion of the bottom peripheral wall to move the ground contact point outward, thereby causing the bottom wall itself to bend and slightly raise the central portion.

Next, the relationship between the thickness of the bottle and the thickness of the bottle will be described.
In the case of P, the resin weight per unit capacity of the bottle is 0.0
The thickness is in the range of 5 to 0.015 g / ml, and the thickness of the wall of the trunk is about 0.3 mm or less at the center of the front and rear walls.

In the thin-walled bottle of the present invention, the thickness of the body wall is about 0.3 mm or less at the center of the front and rear walls, so that it can be easily crushed by hand at the time of disposal. The shape of the bottle is maintained by reinforcing the body and the bottom, and the buckling strength of the bottom is significantly improved by the lateral ribs 22, so that the upright stability of the bottle is ensured.

Next, a second embodiment of the present invention will be described with reference to the drawings. Although the first embodiment relates to a flat bottle, the present embodiment relates to a round bottle, and differs from the first embodiment in that the shoulder, the trunk, and the bottom are circular in cross section. I have. In FIG. 7, Aa
Is a thin-walled blow bottle having a circular cross-section, which comprises a mouth portion 30, a shoulder portion 31, a body portion 32, and a bottom portion 33. Mouth 30
Has a configuration similar to that of the first embodiment, and is not described here because it is redundant.

The shoulder 31 and the torso 32 have a circular cross section, and a step 34 is formed between the shoulder 31 and the torso 32. The torso peripheral wall 35 of the torso 32 extends in the lateral direction. Groove groove 3
6 are arranged at equal intervals in the vertical direction, and the wall surface of the trunk peripheral wall 35 is a wavy wall surface waving in the vertical direction by the concave groove 36. A bulging peripheral wall 37 having a step between itself and the upper portion is provided at the lower end of the body 32, and continues to the bottom 33.

As shown in FIGS. 7 and 8, the bottom portion 33 is composed of a bottom peripheral wall 38 and a bottom wall 39. The bottom peripheral wall 38 is formed to be inclined at a fixed angle, and its lower end 38a is
The central portion is continuous with the grounded bottom end wall 39a of the bottom wall 39 having a curved surface 40 that is concave upward. As shown in FIG. 7, the outer periphery of the grounding bottom end wall 39 a of the bottom wall 39 is significantly smaller in diameter than the trunk peripheral wall 35, the upper end of the bottom peripheral wall 38 is continuous with the bulging peripheral wall 37, and the lower end of the bottom peripheral wall 38. 38a is inclined so as to be continuous with the outer periphery of the ground bottom end wall 39a of the bottom wall 39.

At the lower portion of the bottom peripheral wall 38, a horizontal rib 41 is provided over the entire periphery. The cross-sectional shape of the lateral rib 41 is
As shown in FIG. 9, similarly to the first embodiment, the upper side wall 4 is formed.
1a, two side walls of the lower side wall 41b and a wall surface of the bottom peripheral wall 38 are formed in a triangular shape, and a connection portion between each side wall 41a, 41b of the horizontal rib 41 and the bottom peripheral wall 38 wall surface, a side wall 41a, The connection portion of 41b is connected by an arc.

The lower side wall 41b of the horizontal rib 41 is
The lower wall 41b of the horizontal rib 41 is substantially vertical and the upper wall 41a is slightly inclined in relation to the inclination angle of the bottom peripheral wall 38.

Next, the operation and effect based on the configuration of the bottom will be described. Thickness t1 of lower end portion 38a of bottom peripheral wall 38
Is smaller in diameter and blow ratio than the body peripheral wall 35, so that the wall thickness is thicker than the wall thickness t2 of the body peripheral wall 35, the bottom peripheral wall 38 is strengthened, and the strength against drop impact is improved.

Further, the lower side wall 41b of the horizontal rib 41 is substantially vertical, and the horizontal rib 41 is located near the grounding bottom end wall 39a of the bottom wall 39 and the wall thickness is large.
The bending strength at the bottom is significantly enhanced.

Next, a third embodiment in which the shape of the rib is changed will be described. In the present embodiment, the bottom peripheral wall of the first embodiment is replaced with a horizontal rib, and concave portions are arranged at predetermined intervals on the lower end of the side wall of the bottom peripheral wall corresponding to the position of the horizontal rib. In FIG. 10, A1 is a thin flat blow bottle, and the mouth 1, the shoulder 2, and the body 3 are the same as those of the first embodiment, so that the description is omitted and only the bottom 50 is described.

10 to 12, reference numeral 50 denotes a bottom of the flat bottle, which is composed of a bottom peripheral wall 51 and a bottom wall 52. The bottom peripheral wall 51 is composed of front and rear walls 53 and left and right side walls 54. The side walls 54 are inclined at a constant angle as in the first embodiment, and a lower end 54a of the side wall 54 has a ground bottom end wall. A concave portion 55 is provided at a certain interval close to 52a.

As shown in FIG. 11 and FIG.
It has a rectangular flat bottom wall 56, upper and lower connection walls 57a and 57b connecting the flat bottom wall 56 and the bottom peripheral wall 51, and left and right connection walls 58a and 58b.
It is located near the bottom end wall 52a at the lower end of the bottom peripheral wall 51,
It is formed so as to be substantially vertical.

Next, the operation and effect of the present embodiment will be described. The lower connection wall 57b is formed near the grounding bottom end wall 52a at the lower end of the bottom peripheral wall 51 so as to be substantially vertical. As in the case of the lateral ribs 22 of the first embodiment, the buckling strength of the bottom is enhanced.

Next, a fourth embodiment relating to a circular bottle will be described. In the present embodiment, the bottom peripheral wall of the second embodiment is replaced with a horizontal rib, and recesses are arranged at equal intervals at the lower end of the bottom peripheral wall corresponding to the position of the horizontal rib. As shown in FIGS. 13 to 15, Aa1 is a thin circular blow bottle, and the bottom 60 is made up of a bottom peripheral wall 61 and a bottom wall 62.
The bottom peripheral wall 61 is formed so as to be inclined at a certain angle, and the lower end portion 61a is continuous with the grounding bottom end wall 62a of the bottom wall 62 having a curved surface whose central portion is concave upward. I have.

The outer periphery of the grounding bottom end wall 62a of the bottom wall 62 is significantly smaller in diameter than the trunk peripheral wall, the upper end of the bottom peripheral wall 61 is continuous with the trunk peripheral wall, and the lower end 61a of the bottom peripheral wall 61 is in contact with the bottom wall 62. It is inclined so as to be continuous with the outer periphery of the bottom end wall 62a. At the lower end portion 61a of the bottom peripheral wall 61, a concave portion 63 is provided at a predetermined interval close to the grounding bottom end wall 62a.

The recess 63 has a rectangular flat bottom wall 64 and upper and lower connecting walls 65 connecting the flat bottom wall 64 and the bottom peripheral wall 61.
a, 65b and left and right connection walls 66a, 66b, and the lower connection wall 65b is a lower end portion 61a of the bottom peripheral wall 61.
Is formed near the ground bottom end wall 62a and is substantially vertical.

Next, the operation and effect of this embodiment will be described. The lower connecting wall 65b is connected to the lower end 61a of the bottom peripheral wall 61.
As described above, the buckling strength of the bottom portion is enhanced, as in the case of the horizontal ribs of the previous embodiments, by being located near the grounding bottom end wall 62a.

In the third and fourth embodiments, the concave portions are square, but may be elliptical concave portions or square concave portions.

[0042]

Since the present invention is configured as described above, it has the following effects. The bottom peripheral wall of the bottle was formed so as to be inclined at a certain angle, and the lower end of the bottom peripheral wall was not thinned, so that the bottom of the bottle could be strengthened.

A horizontal rib is provided around the entire circumference at the lower end of the bottom peripheral wall, and the lower wall of the horizontal rib is formed to be substantially vertical. The buckling strength of the bottle was increased, and the bottle was able to secure the upright stability and shape retention of the bottle despite being a thin bottle.

Since the recesses are arranged at intervals at the lower end of the bottom peripheral wall, and the lower connection portions of the recesses are formed so as to be substantially vertical, the buckling strength of the bottom peripheral wall can be increased, and The upright stability and shape-retaining property of this product could be secured.

[Brief description of the drawings]

FIG. 1 is a front view of a blow bottle according to a first embodiment of the present invention.

FIG. 2 is a side view of the bottle.

FIG. 3 is a plan view of the bottle.

FIG. 4 is a bottom view of the bottle.

FIGS. 5A and 5B are explanatory views of horizontal ribs at the bottom of the bottle, wherein FIG. 5A is a partially sectional front view, and FIG. 5B is a partially sectional side view.

FIG. 6 is an explanatory view when the bottom of the bottle is deformed.

FIG. 7 is a front view of a bottle according to a second embodiment.

FIG. 8 is a bottom view of the bottle.

FIG. 9 is a cross-sectional view of the bottom of the bottle.

FIG. 10 is a side view of a bottle according to a third embodiment.

FIG. 11 is a bottom view of the bottle.

12 is a partial cross-sectional front view of the bottom of the bottle, taken along the line AA of FIG. 11;

FIG. 13 is a front view of a bottle according to a fourth embodiment.

FIG. 14 is a bottom view of the bottle.

FIG. 15 is a sectional view of the bottom of the bottle.

[Explanation of symbols]

 A, Aa, A1, Aa1 Blow bottle 1, 30 Mouth 2, 31 Shoulder 3, 32 Body 4, 33, 50, 60 Bottom 18, 38, 51, 61 Bottom peripheral wall 19, 39, 52, 62 Bottom wall 19a, 39a, 52a, 62a Ground bottom end wall 20, 53 Front and rear wall 21, 54 Side wall 20a, 21a, 38a, 54a, 61a Lower end 22, 41 Lateral rib 22a, 41a Upper side wall 22b, 41b Lower side wall 55, 63 Recess 56, 64 Flat bottom wall 57a, b, 65a, b Upper and lower connecting wall 58a, b, 66a, b Left and right connecting wall

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shigeru Yoneyama 3-2-6 Oshima, Koto-ku, Tokyo F-term in Yoshino Kogyosho Co., Ltd. (Reference) 3E033 AA02 BA15 BA16 CA02 DA03 DA08 DB01 DD05 EA03 EA04 EA05 FA03

Claims (4)

[Claims] 1. A flat bottle comprising a mouth, a body and a bottom, wherein the bottom comprises a bottom peripheral wall and a bottom wall following the body, and the bottom peripheral wall comprises a slightly inclined front and rear walls. , Formed from left and right side walls inclined at a certain angle, and at the lower end of the bottom peripheral wall,
A thin-walled blow bottle, wherein a horizontal rib is provided so as to surround a bottom peripheral wall, and a lower wall of the horizontal rib is formed to be substantially vertical in the left and right side wall portions. 2. A circular bottle comprising a mouth, a body and a bottom, wherein the bottom comprises a bottom peripheral wall and a bottom wall following the body, and the bottom peripheral wall is formed to be inclined at a certain angle. Has been
A thin-walled blow bottle comprising a horizontal rib disposed at a lower end of a bottom peripheral wall so as to surround the peripheral wall, and a lower wall of the horizontal rib is formed to be substantially vertical. 3. A flat bottle comprising a mouth, a body and a bottom, wherein the bottom comprises a bottom peripheral wall and a bottom wall following the body, and recesses are provided at predetermined intervals on left and right side walls of the bottom peripheral wall. And place it,
A thin blow bottle characterized in that the lower wall of the recess is located at the lower end of the bottom peripheral wall and is formed substantially vertically. 4. A circular bottle comprising a mouth, a body and a bottom, wherein the bottom comprises a bottom peripheral wall and a bottom wall following the body, and recesses are formed at equal intervals around the entire circumference of the bottom peripheral wall. A thin-walled blow bottle provided, wherein the lower side wall of the recess is located at the lower end of the bottom peripheral wall and is formed substantially vertically.