JP6929726B2 - Multiple bottles made of synthetic resin - Google Patents

Description

The present invention relates to multiple bottles made of synthetic resin.

Conventionally, an inner container body that is deformed by volume reduction due to external pressure (hereinafter, may be referred to as "volume reduction deformation") is arranged inside the outer shell bottle that can be restored to its original shape with respect to the external pressure, and the outer shell bottle and the outer shell bottle are arranged. A synthetic resin multiple bottle in which outside air is introduced between the inner container and the inner container is known (see, for example, Patent Documents 1 and 2).

In the synthetic resin multiple bottle, by pressing the body of the outer shell bottle, the inner container body is reduced in volume and deformed, and the contents contained in the inner container body are poured out, while the pressing is released. The outside air is introduced between the outer shell bottle and the inner container body by the action of a check valve or the like separately provided. As a result, the outer shell bottle returns to its original shape due to the outside air pressure, while the inner container body is maintained in a volume-reduced and deformed state. In this case, since the outside air does not enter the inner container, it is possible to prevent the contents contained in the inner container from being denatured due to oxidation or the like.

As described above, it is desired that the synthetic resin multiple bottle has a property (squeeze property) that the outer shell bottle is smoothly deformed by the pressing force of the hand and smoothly returns to the original shape when the pressing force is released.

Japanese Unexamined Patent Publication No. 2013-245010 JP-A-2010-82916

However, the conventional multiple bottle has a disadvantage that good squeeze performance may not be obtained depending on the shape of the outer shell bottle.

An object of the present invention is to eliminate such inconvenience and to provide a synthetic resin multiple bottle having an outer shell bottle having excellent squeeze properties.

In order to achieve such an object, the synthetic resin multiple bottle of the first aspect has a cylindrical outer mouth portion, a shoulder portion connected to the outer mouth portion, a body portion connected to the shoulder portion, and the body portion. An outer shell bottle having a bottom portion connected to the portion and a ground contact portion connected to the bottom portion and capable of returning to the original shape with respect to an external pressure, and an outer shell bottle arranged on the inner peripheral side of the cylindrical outer mouth portion of the outer shell bottle. An inner container body that is connected to the inner mouth portion and has a shape that conforms to the inner surface shape of the outer shell bottle, and is deformed by external pressure, and the outer mouth portion and the outer mouth portion. In a synthetic resin multiple bottle formed between an inner mouth portion and provided with a ventilation path for introducing outside air between the outer shell bottle and the inner container body, the body portion of the outer shell bottle is the shoulder. The region from the lower end of the portion connected to the portion to the upper end portion of the portion connected to the bottom portion is cylindrical with the same diameter, and the body portion is connected to the shoulder portion via the first circumferential groove portion. On the other hand, it is characterized in that it is connected to the bottom portion via the second circumferential groove portion.

Synthetic resin multiplexing bottle of the first aspect of Ru having the above-described configuration, by pressing the body portion of the outer shell bottle towards the outer mouth and the inside mouth downward, the contents of the inner container body The body of the body is reduced in volume and deformed, and the contents are poured out. Next, when the pressure on the body of the outer shell bottle is released, outside air is introduced from the ventilation passage between the outer shell bottle and the inner container body body, and the outer shell bottle returns to its original shape due to the outside air pressure. However, the inner container body is maintained in a state of being reduced in volume and deformed.

At this time , in the synthetic resin multiple bottle of the first aspect, the region from the lower end of the portion where the body portion of the outer shell bottle is connected to the shoulder portion to the upper end portion of the portion connected to the bottom portion is the same. Since the body has a diameter and is connected to the shoulder via the first circumferential groove, and is connected to the bottom via the second circumferential groove, the upper and lower portions of the body are connected. The effect of reinforcing can be obtained, and the pressing force is released without the deformation of the body portion sandwiched between the first circumferential groove portion and the second circumferential groove portion spreading too much up and down the bottle. When this is done, excellent restoration to the original shape can be obtained.

The body portion is preferably formed into a cylindrical shape having a diameter smaller than the maximum diameter of the shoulder portion and the bottom portion connected via the first circumferential groove portion and the second circumferential groove portion, thereby further improving the squeeze property. Can be made to.

Further, the synthetic resin multiple bottle of the second aspect, which is the synthetic resin multiple bottle according to the present invention, has the configuration of the synthetic resin multiple bottle of the first aspect, and at least the body of the outer shell bottle. It is characterized by having an arcuate cross section that is convex outward over the entire circumference of the cylindrical region, and having a plurality of vertical ribs extending in the axial direction.

The synthetic resin multiple bottle of the second aspect has the same action as the synthetic resin multiple bottle of the first aspect, and the outer mouth portion and the inner opening portion are directed downward by the action of a check valve or the like. When the body of the outer shell bottle is pressed, the volume of the inner container body is reduced and the contents are poured out, and when the pressure on the body of the outer shell bottle is released, the outer shell bottle returns to its original shape. The inner container body is maintained in a state of being reduced in volume and deformed.

At this time , in the synthetic resin multiple bottle of the second aspect, the region from the lower end of the portion where the body portion of the outer shell bottle is connected to the shoulder portion to the upper end portion of the portion connected to the bottom portion is the same. It has a cylindrical shape with a diameter, and the body portion is connected to the shoulder portion via the first circumferential groove portion, while it is connected to the bottom portion via the second circumferential groove portion, so that it has excellent press deformability. And it is possible to obtain the original shape restoration property. The body portion preferably has a cylindrical shape having a diameter smaller than the maximum diameter of the shoulder portion connected to the first circumferential groove portion or the bottom portion connected to the second circumferential groove portion, thereby improving the squeeze property. Can be improved.

Further, an arc-shaped cross section that is convex outward over at least the entire circumference of the cylindrical region of the body portion sandwiched between the first circumferential groove portion and the second circumferential groove portion of the outer shell bottle. Since it is provided with a plurality of vertical ribs extending in the axial direction, the feel of the fingers becomes soft when pressed, the body can be pressed appropriately, and the body is crushed to cause creases. There is no remaining.

Therefore , according to the synthetic resin multiple bottle of the second aspect, even better squeeze performance can be obtained.

In the synthetic resin multiple bottle of the second aspect, the vertical ribs may extend parallel to the axial direction of the outer shell bottle, and may extend at 0 ° with respect to the axial direction of the outer shell bottle. It may extend in the direction of inclination at an angle in the range of more than 45 ° and less than 45 °.

The perspective view which shows the structural example of the synthetic resin multiplex bottle of 1st Embodiment. FIG. 1 is a sectional view taken along line II-II of FIG. The perspective view which shows the structural example of the synthetic resin multiplex bottle of 2nd aspect. IV-IV line end view of FIG. FIG. 3 is a perspective view showing another configuration example of the synthetic resin multiplex bottle of the second aspect.

Next, embodiments of the synthetic resin multiple bottle of the first aspect and the synthetic resin multiple bottle of the second aspect will be described in more detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the synthetic resin multiplex bottle 1 of the first aspect of the present embodiment is housed in an outer shell bottle 2 capable of returning to its original shape with respect to an external pressure and inside the outer shell bottle 2. It is composed of an inner container body 3 that is deformed by external pressure. The outer shell bottle 2 and the inner container body 3 are made of, for example, a polyester resin such as polyethylene terephthalate resin.

The outer shell bottle 2 includes a cylindrical outer mouth portion 4, a shoulder portion 5 connected to the outer mouth portion 4, a body portion 6 connected to the shoulder portion 5, and a bottom portion 7 connected to the body portion 6. .. The bottom portion 7 is provided with a recess 8 on the inner peripheral side that bulges inside the outer shell bottle 2 to impart independence to the synthetic resin multiple bottle 1, and a grounding portion 9 is provided between the bottom portion 7 and the recess 8. ing.

The outer opening portion 4 is provided with a male screw portion 10 and a support ring 11 on the outer peripheral surface, and the shoulder portion 5 has a quadrangular pyramid-shaped portion 12 in contact with the outer opening portion 4, and is below the quadrangular pyramid portion 12. The diameter of the quadrangular pyramid portion 12 gradually increases toward the body portion 6, and the angle of the quadrangular pyramid becomes smooth, and the body portion upper portion 13 connected to the cylindrical body portion is provided.

The body portion 6 has a circular cross section orthogonal to the axis, and is connected to the shoulder portion 5 via the first circumferential groove portion 6a, while being connected to the bottom portion 7 via the second circumferential groove portion 6b. There is. Further, the body portion 6 is a cylindrical portion 6c having the same diameter in the region from the lower end portion of the circumferential groove portion 6a connected to the shoulder portion 5 to the upper end portion of the circumferential groove portion 6b connected to the bottom portion 7. ..

The bottom portion 7 has a quadrangular pyramid-shaped portion 15 in contact with the ground contact portion 9, and the diameter of the bottom portion 7 gradually increases from the quadrangular pyramid-shaped portion 15 toward the body portion 6 above the quadrangular pyramid-shaped portion 15, and the corners of the quadrangular pyramid. Is provided with a lower body portion 16 that is smooth and connects to a cylindrical body portion.

Further, each of the quadrangular pyramid-shaped portions 12 and 15 has a quadrangular cross section orthogonal to the axis, and R is attached to the apex thereof, and the apex is provided with ridge lines 12a and 15a. Here, the ridge line 15a is continuous on the extension of the ridge line 12a.

On the other hand, the inner container body 3 is connected to the cylindrical inner mouth portion 17 arranged on the inner peripheral side of the outer mouth portion 4 and the inner mouth portion 17, and the shoulder portion 5 and the body portion 6 of the outer shell bottle 2 are connected to each other. It includes a bottom portion 7, a recess 8, and an inner container body body 18 having a shape that conforms to the inner surface shape of the ground contact portion 9. The inner opening portion 17 includes an extending portion 19 extending above the upper end of the outer opening portion 4 and a flange portion 20 extending radially outward from the extending portion 19. It is locked to the upper end edge of the outer opening portion 4 by the portion 20.

Further, the inner opening portion 17 is provided with a vertical groove 21 on the outer peripheral surface. The vertical groove 21 is continuously provided in the horizontal groove 22 formed on the lower surface of the flange portion 20, and the horizontal groove 22 is open to the outside at the outer peripheral edge of the collar portion 20. As a result, the vertical groove 21 and the horizontal groove 22 form a ventilation passage 23 for introducing outside air between the outer shell bottle 2 and the inner container body 3.

The synthetic resin multiple bottle 1 can be manufactured, for example, by arranging the inner preform forming the inner container body 3 inside the outer preform forming the outer shell bottle 2 and blow molding. The blow molding can be performed by a method known per se using a well-known blow molding apparatus.

The synthetic resin multiple bottle 1 according to the first aspect of the present embodiment has a peripheral groove portion 6b connected to the bottom portion 7 from the lower end portion of the circumferential groove portion 6a connected to the shoulder portion 5 of the body portion 6 of the outer shell bottle 2. The region up to the upper end is a cylindrical portion 6c having the same diameter, and the diameter is smaller than the maximum diameter portion of the shoulder portion 13 and the bottom portion 16, so that it has excellent press deformation and restoration to the original shape. You can get a good squeeze.

Next, as shown in FIG. 3, the synthetic resin multiplex bottle 1 of the second aspect, which is the synthetic resin multiplex bottle according to the present invention, has a first circumferential groove 6a and a second circumferential groove 6b. The synthetic resin multiplexing of the first aspect shown in FIGS. 1 and 2, except that a plurality of vertical ribs 14 extending in the axial direction are provided over the entire circumference of the sandwiched cylindrical portion 6c. It has the same configuration as bottle 1.

In FIG. 3, the same configuration as that of the synthetic resin multiplex bottle 1 of the first aspect is designated by the same reference numerals, and detailed description thereof will be omitted. Further, in the synthetic resin multiple bottle 1 of the second aspect, the fact that the cylindrical portion 6c has the same diameter from the lower end portion of the circumferential groove portion 6a to the upper end portion of the circumferential groove portion 6b is circumscribed to the vertical rib 14. It means that the diameter of the circle or the inscribed circle is the same.

The vertical rib 14 has an arcuate cross section that is convex outward, as shown by enlarging a part thereof in FIG. 4, and the valley bottom portion (adjacent arcuate portion 14a) of the arcuate portion 14a. The height h from the connecting portion) to the top is preferably in the range of 0.5 to 2.0 mm, and more preferably in the range of 1.0 to 1.5 mm. If the height h of the arcuate portion 14a is less than 0.5 mm, the vertical rib 14 may not be able to function as a rib, and if it exceeds 2.0 mm, a stronger force is required for pressing, and both are desired. It may not be possible to obtain the squeeze nature of.

Further, the vertical rib 14 preferably has a width w of the arcuate portion 14a in the range of 2.0 to 7.0 mm, and more preferably in the range of 3.0 to 6.0 mm. If the width w of the arcuate portion 14a is less than 2.0 mm, the vertical rib 14 may not be able to function as a rib, and if it exceeds 7.0 mm, a strong force is required by pressing, and both are desired. It may not be possible to obtain squeeze play.

The synthetic resin multiple bottle 1 of the second aspect of the present embodiment is provided with the vertical ribs 14, so that the outer shell bottle 2 is smoothly deformed by the pressing force of the hand, and when the pressing force is released, the original shape is smoothly restored. It is possible to obtain excellent squeeze performance.

Further, in the synthetic resin multiple bottle 1 of the second aspect of the present embodiment, as shown in FIG. 5, the vertical rib 14 exceeds 0 ° and 45 ° with respect to the direction of the axis O of the outer shell bottle 2. It may extend in the direction of inclination at an angle in the following range (0 <θ ≦ 45), preferably in an angle in a range of more than 0 ° and 30 ° or less (0 <θ ≦ 30). When the vertical rib 14 extends in a direction in which the outer shell bottle 2 is inclined at an angle exceeding 45 ° with respect to the direction of the axis O, sufficient squeeze performance may not be obtained.

In the synthetic resin multiple bottle 1 of the second aspect of the present embodiment, the vertical rib 14 extends in a direction in which the vertical rib 14 is inclined at an angle in the above range with respect to the direction of the axis O of the outer shell bottle 2. , It extends from the upper left to the lower right, but it may extend from the upper right to the lower left.

Further, in the synthetic resin multiple bottle 1 of the first aspect or the second aspect of the present embodiment, the peripheral groove portions 6a and 6b are provided above and below the body portion 6, but the circumferential groove portions 6a are replaced. A step portion that gradually reduces the diameter from the shoulder portion 5 to the body portion 6 may be provided, or a step portion that gradually reduces the diameter from the bottom portion 7 to the body portion 6 may be provided instead of the circumferential groove portion 6b. .. The synthetic resin multiple bottle 1 of the first aspect or the second aspect of the present embodiment has an effect of reinforcing the upper and lower portions of the body portion 6 by providing the circumferential groove portions 6a and 6b or the stepped portions. This makes it possible to further improve the squeeze property of the body portion 6 sandwiched between the circumferential groove portions 6a and 6b or the stepped portion.

1 ... Synthetic resin multiple bottle, 2 ... Outer shell bottle, 3 ... Inner container body, 4 ... Outer mouth part, 5 ... Shoulder part, 6 ... Body part, 7 ... Bottom part, 9 ... Grounding part, 14 ... Vertical rib, 17 ... Inner mouth, 18 ... Inner container body, 23 ... Ventilation path.

Claims (4)

A cylindrical outer mouth portion, a shoulder portion connected to the outer mouth portion, a body portion connected to the shoulder portion, a bottom portion connected to the body portion, and a ground contact portion connected to the bottom portion are provided to apply external pressure. On the other hand, the outer shell bottle that can be restored to its original shape and
A cylindrical inner mouth portion arranged on the inner peripheral side of the cylindrical outer mouth portion of the outer shell bottle, and an inner container body body having a shape connected to the inner mouth portion and conforming to the inner surface shape of the outer shell bottle. With an inner container that is deformed by external pressure,
In a synthetic resin multiple bottle formed between the outer mouth portion and the inner mouth portion and provided with a ventilation path for introducing outside air between the outer shell bottle and the inner container body.
The body of the outer shell bottle has a cylindrical shape in which the region from the lower end of the portion connected to the shoulder portion to the upper end portion of the portion connected to the bottom portion has the same diameter.
The body portion is connected to the shoulder portion via the first circumferential groove portion, while is connected to the bottom portion via the second circumferential groove portion.
It is characterized by having an arcuate cross section that is convex outward over at least the entire circumference of the cylindrical region of the body of the outer shell bottle, and having a plurality of vertical ribs extending in the axial direction. Multiple bottles made of synthetic resin. In the synthetic resin multiple bottle according to claim 1, the body portion of the outer shell bottle is the maximum diameter portion of the shoulder portion connected to the first circumferential groove portion or the bottom portion connected to the second circumferential groove portion. A multi-layered bottle made of synthetic resin, which is characterized by having a cylindrical shape with a smaller diameter. The synthetic resin multiplex bottle according to claim 1 or 2 , wherein the vertical ribs extend parallel to the axial direction of the outer shell bottle. In the synthetic resin multiple bottle according to claim 1 or 2 , the vertical ribs extend in a direction in which the vertical ribs are inclined at an angle in the range of more than 0 ° and not more than 45 ° with respect to the axial direction of the outer shell bottle. A multi-layered bottle made of synthetic resin, which is characterized by being used.

Images