JP6879683B2 - 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 bottle that can be restored to its original shape with respect to the external pressure, and the outer bottle and the inner container are arranged. Multiple bottles made of synthetic resin that allow outside air to be introduced between the body and the body are known.

In the synthetic resin multiple bottle, by pressing the body of the outer bottle, the inner container body is reduced in volume and deformed to eject the contents contained in the inner container body, while the pressing is released. Outside air is introduced between the outer bottle and the inner container by the action of a check valve or the like provided separately. As a result, the outer bottle returns to its original shape due to the external 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.

By the way, in the synthetic resin multiple bottle, when the inner container body is volume-reduced and deformed as described above, the volume-reducing deformation is in the length direction or the radial direction (width in the case of a square bottle) of the body portion of the inner container body. There is a problem that the contents become uneven in the direction), the contents cannot be sufficiently poured out, and the residual liquid may not be large.

In order to solve the above problem, there is known a multiple bottle in which a recess or a groove is formed on the outer peripheral surface of the inner container body so as to be deformed along the recess or the groove (see, for example, Patent Document 1).

Japanese Patent No. 3872651

However, the conventional multiple bottle has a disadvantage that the manufacturing method becomes complicated because a recess or a groove must be formed on the outer peripheral surface of the inner container body.

An object of the present invention is to provide a multiple bottle made of synthetic resin, which can be easily manufactured and can reduce the residual liquid of the contents by eliminating such inconvenience.

In order to achieve such an object, the synthetic resin multiple bottle of the present invention 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. comprising a bottom portion for connecting, and a ground portion which connects to the bottom section, a possible original return relative to the external pressure, the shoulder portion is the portion which connects to the outer mouth is polygonal pyramid, polygonal pyramid comprising a body portion upper cross section of the corner of the pyramid is orthogonal to axis becomes smooth while gradually enlarged toward the cylinder portion from the partial downward portion leading to the trunk portion is circular, said bottom is the ground portion connected to the part is Ru with a ridge leading to the extension of the polygonal pyramid shaped ridge of the shoulder portion, and a polygonal pyramid portion, the body portion from the multi pyramidal portion above the multi pyramidal portion An outer bottle having a lower part of the body connected to the body having a circular shape with a circular cross section perpendicular to the axis as the diameter of the polygonal pyramid becomes smoother as the diameter gradually increases, and the cylindrical outer mouth portion of the outer bottle. An inner container body that is provided with a cylindrical inner mouth portion arranged on the inner peripheral side and 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 bottle, and is deformed by external pressure. It is characterized by providing a ventilation path formed between the outer mouth portion and the inner mouth portion and introducing outside air between the outer bottle and the inner container body.

In the synthetic resin multiple bottle having the above configuration, the inner container body of the inner container body is pressed by pressing the outer port portion and the inner mouth portion downward and pressing the body portion of the outer bottle. The contents are poured out after the volume is reduced and deformed. Next, when the pressure on the body of the outer bottle is released, outside air is introduced from the ventilation passage between the outer bottle and the inner container body, and the outer bottle returns to its original shape due to the outside air pressure. The inner container body is maintained in a state of being reduced in volume and deformed.

At this time, since the contents are concentrated in the direction of the inner mouth portion due to gravity, the inner container body body starts from the portion corresponding to the polygonal pyramid-shaped portion connected to the ground contact portion at the bottom of the outer bottle. A valley-folded portion is formed on the side surface portion of the inner container body corresponding to the portion sandwiched between the polygonal pyramid-shaped ridges, and deformation that immerses inward (hereinafter, abbreviated as "valley-folded deformation") begins.

In the synthetic resin multiple bottle of the present invention, the portion connected to the ground contact portion at the bottom of the outer bottle has a polygonal pyramid shape, and the inner container body has a shape that conforms to the internal shape of the outer bottle. .. Therefore, the valley bending deformation is stronger because the portion of the inner container body corresponding to the polygonal pyramid-shaped ridge line acts as a rib and the strength is higher than that of the side surface portion corresponding to the portion sandwiched between the ridge lines. It is considered that this is started by the formation of a valley fold on the small side surface portion.

In the synthetic resin multiple bottle of the present invention, the content gradually decreases by repeating pressing the body of the outer bottle and releasing the pressing, and as the content decreases, the inner container body body Valley break deformation progresses. The valley bending deformation of the inner container body starts from the portion corresponding to the portion connected to the ground contact portion at the bottom of the outer bottle, and progresses from the outside to the inside of the inner container body in the width direction, and is long. In the longitudinal direction, the process proceeds from the portion corresponding to the portion connected to the ground contact portion at the bottom of the outer bottle toward the inner mouth portion.

When the contents are further reduced, the valley bending deformation of the inner container body reaches a portion corresponding to a portion connected to the outer mouth portion of the shoulder portion of the outer bottle. At this time, the polygonal pyramid-shaped ridge line of the portion connected to the outer mouth portion of the shoulder portion is on the extension of the polygonal pyramid-shaped ridge line of the portion connected to the ground contact portion of the bottom portion. Therefore, the valley bending deformation in the inner container body proceeds toward the side surface portion corresponding to the portion sandwiched between the polygonal pyramid-shaped ridges of the portion connected to the outer mouth portion of the shoulder portion.

At this time, the portion of the inner container body corresponding to the polygonal pyramid-shaped ridge line of the portion connected to the outer mouth portion of the shoulder portion corresponds to the polygonal pyramid-shaped ridgeline of the portion connected to the ground contact portion of the bottom portion. Acts as a rib as well as a part. Therefore, the portion of the inner container body that is connected to the outer mouth of the shoulder portion that corresponds to the polygonal pyramid-shaped ridge line has greater strength than the side surface portion that corresponds to the portion sandwiched between the ridge lines, and the side surface thereof. The portion is easily valley-folded in a form that is continuous with the valley-folding deformation.

As a result, the valley bending deformation is a portion of the entire inner container body that is in contact with the ground contact portion at the bottom of the outer bottle in the diagonal direction from the outside to the inside of the inner container body and in the length direction. It will proceed from the portion corresponding to the inner mouth portion, and thereby the residual liquid of the contents can be reduced.

Further, in the synthetic resin multiple bottle of the present invention, as described above, the inner container body has a shape that conforms to the internal shape of the outer bottle. Therefore, the synthetic resin multiple bottle of the present invention does not require an operation of combining a separately prepared inner container with the outer bottle. For example, the preform forming the inner container body is overlaid with the preform forming the outer bottle. Therefore, it can be easily manufactured by blow molding all at once.

A synthetic resin multiplexing bottle of the present invention, the shoulder portion of the outer bottle Ri moiety polygonal pyramid der articulating before Kigai opening, the cross section perpendicular to the axis in the portion which connects the front kidou portion that has become circular.

Also, in the synthetic resin multiplexing bottle of the present invention, the bottom portion which connects the front Symbol grounding portion of said outer bottle Ri polygonal pyramid der, is a cross section perpendicular to the axis at a portion connected to the front kidou portion that has become circular.

Further, in the synthetic resin multiple bottle of the present invention, the body portion has a round bottle shape having a circular cross section perpendicular to the axis, so that the body portion can be gripped at any position of the body portion when gripped as compared with the square bottle shape. It can be gripped and squeezed (smoothly pressed and deformed by the pressing force of the hand and smoothly restored to its original shape when the pressing force is released), and there is no problem in positioning the label when attaching the label to the bottle, which is an excellent work. You can get sex. At this time, the body portion may have a cylindrical shape having the same diameter from the portion whose cross section orthogonal to the axis is connected to the shoulder portion to the portion connected to the bottom portion, but the portion connected to the shoulder portion to the center. It is preferable that the diameter is gradually reduced toward the portion and gradually increased toward the portion connected to the bottom portion from the central portion.

Since the body portion has a drum shape whose central portion has a smaller diameter than the portion connected to the shoulder portion or the bottom portion, the drum-shaped portion can be gripped and easily pressed or pressed. Can be released. As a result, the synthetic resin multiple bottle of the present invention can obtain excellent squeezing property (property of being smoothly pressed and deformed by the pressing force of the hand and smoothly returning to the original shape when the pressing force is released).

Further, in the synthetic resin multiple bottle of the present invention, it is preferable that the body portion has a plurality of ribs along the axial direction. In the synthetic resin multiple bottle of the present invention, since the body portion is provided with the plurality of ribs, the body portion can be easily gripped, and further excellent squeeze performance can be obtained.

The perspective view which shows the structure of the synthetic resin multiple bottle of this invention. FIG. 1 is a sectional view taken along line II-II of FIG. FIG. 1 is an end view of line III-III. The perspective view which shows the use state of the synthetic resin multiple bottle of this invention. A is a sectional view taken along line AA of FIG. 4, and B is a sectional view taken along line BB of FIG.

Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the synthetic resin multiple bottle 1 of the present embodiment has an outer bottle 2 that can be restored to its original shape with respect to an external pressure and an inner container body that is housed inside the outer bottle 2 and deformed by the external pressure. It consists of 3.

The outer 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 bottle 2 to impart independence to the synthetic resin multiple bottle 1, and a grounding portion 9 is formed between the bottom portion 7 and the recess 8. There is.

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 quadrangular pyramid portion 12 gradually increases in diameter toward the body portion 6, and the corners of the quadrangular pyramid become 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 step portion 6a, while being connected to the bottom portion 7 via the step portion 6b. The step portion 6a is gradually reduced in diameter from the shoulder portion 5 to the body portion 6, and the step portion 6b is gradually reduced in diameter from the bottom portion 7 to the body portion 6.

Further, the body portion 6 gradually reduces in diameter from the lower end portion of the step portion 6a connected to the shoulder portion 5 toward the central portion 6c, and gradually decreases from the central portion 6c toward the upper end portion of the step portion 6b connected to the bottom portion 7. It has a drum shape that expands in diameter. Further, the body portion 6 is provided with a plurality of ribs 14 along the axial direction, and the ribs 14 are formed over the entire circumference of the body portion 6 as shown in FIG.

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, the body portion 6, and the bottom portion 7 of the outer bottle 2 are connected to each other. The recess 8 and the inner container body 18 having a shape that conforms to the inner surface shape of the ground contact portion 9 are provided. 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 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 bottle 2 and blow molding. The blow molding can be carried out by a method known per se using a well-known blow molding apparatus.

Next, the usage state and the action and effect of the synthetic resin multiple bottle 1 of the present embodiment will be described with reference to FIGS. 4, 5A and 5B.

The synthetic resin multiple bottle 1 of the present embodiment contains contents (not shown) in the inner container body 3, and when the contents are poured out, as shown in FIG. 4, the outer mouth portion 4 and the inner mouth portion 4 and the inner mouth Tilt the portion 17 downward. Then, when the body 6 of the outer bottle 2 is gripped and pressed, the inner container body 18 is volume-reduced and deformed, so that the contents are poured out. In the synthetic resin multiple bottle 1, the body 6 has a circular cross section orthogonal to the axis, so that the body 6 can be pressed from any direction with respect to the axis, and the body 6 has a drum shape and is along the axial direction. Since the plurality of ribs 14 formed are provided, the central portion 6c thereof can be easily grasped to reduce the volume and deform the inner container body body 18, and excellent squeezing property can be obtained.

Next, when the pressure on the body 6 of the outer bottle 2 is released, outside air is introduced from the ventilation passage 23 between the outer bottle 2 and the inner container body 18, and the outer bottle 2 returns to its original shape due to the outside air pressure. The inner container body 18 is maintained in a state of being reduced in volume and deformed.

At this time, since the contents are concentrated in the direction of the inner mouth portion 17 due to gravity, the inner container body body 18 starts from the portion corresponding to the quadrangular pyramid portion 15 of the bottom portion 7 of the outer bottle 2. A valley fold portion 18b is formed in the central portion of the side surface portion 18a corresponding to the portion sandwiched between the ridge lines 15a and 15a in the above, and the valley fold deformation starts when the valley fold portion 18b is immersed in the inside.

In the synthetic resin multiple bottle 1 of the present embodiment, the portion of the outer bottle 2 that is connected to the grounding portion 9 of the bottom 7 is a quadrangular pyramid portion 15, and the inner container body 18 has the internal shape of the outer bottle 2. It has a shape that follows it. Therefore, in the valley bending deformation, the portion of the inner container body 18 corresponding to the ridge line 15a acts as a rib, and the strength is higher than that of the side surface portion 18a corresponding to the portion sandwiched between the ridge lines 15a and 15a. As shown by the imaginary line, it is considered that the valley fold portion 18b is formed in the central portion of the side surface portion 18a having a lower strength.

In the synthetic resin multiple bottle 1, the contents are gradually reduced by repeatedly pressing the body portion 6 of the outer bottle 2 and releasing the pressing. When the contents are reduced, the valley bending deformation of the inner container body 18 starts from the portion corresponding to the quadrangular pyramid portion 15 of the bottom 7 of the outer bottle 2, and is from the outside to the inside of the inner container body 18 in the width direction. As shown in FIG. 5A, the adjacent side surface portions 18a and 18a come into contact with each other and are deformed in a cross-sectional view.

Further, the valley bending deformation of the inner container body 18 proceeds from the portion corresponding to the quadrangular pyramid portion 15 of the bottom portion 7 of the outer bottle 2 toward the inner mouth portion 17 in the length direction. At this time, the valley-folded and deformed portions 18a and 18b of the inner container body 18 are separated from the inner surface of the outer bottle 2 as the valley-folded deformation progresses, as shown in FIG. 5A.

When the contents are further reduced, the valley bending deformation of the inner container body 18 eventually reaches the portion corresponding to the body portion 6 to the shoulder portion 5 of the outer bottle 2. At this time, the ridge line 12a of the quadrangular pyramid portion 12 of the shoulder portion 5 in the outer bottle 2 is on the extension of the ridge line 15a of the quadrangular pyramid portion 15 of the bottom portion 7. Therefore, the valley bending deformation in the inner container body 18 proceeds toward the side surface portion 18a corresponding to the portion sandwiched between the ridge lines 12a and 12a of the quadrangular pyramid portion 12 of the shoulder portion 5.

Further, at this time, the portion of the inner container body 18 corresponding to the ridge line 12a of the quadrangular pyramid portion 12 of the shoulder portion 5 acts as a rib in the same manner as the portion corresponding to the ridge line 15a of the quadrangular pyramid portion 15 of the bottom portion 7. Therefore, the strength is higher than that of the side surface portion 18a corresponding to the portion sandwiched between the ridge lines 12a and 12a. Therefore, as shown in FIG. 5B, the side surface portion 18a corresponding to the portion sandwiched between the ridge lines 12a and 12a is easily valley-folded and the valley-folded portion 18b is formed in a form continuous with the valley-folded portion deformation, and the adjacent side surfaces are formed. The portions 18a and 18a come into contact with each other and are deformed in a cross-sectional view.

As a result, the valley bending deformation occurs in the entire inner container body 18 from the outside to the inside in the width direction, and the quadrangular pyramid portion of the bottom 7 of the outer bottle 2 in the length direction. It will proceed from the portion corresponding to 15 toward the inner opening portion 17, and the contents contained in the inner container body body 18 can be completely poured out, and the residual liquid can be reduced. ..

In the present embodiment, the portion of the outer bottle 2 that is connected to the outer mouth portion 4 of the shoulder portion 5 is a quadrangular pyramid portion 12, but the entire shoulder portion 5 may be a quadrangular pyramid portion 12. Further, in the present embodiment, the portion of the outer bottle 2 that is connected to the ground contact portion 9 of the bottom portion 7 is a quadrangular pyramid-shaped portion 15, but the entire bottom portion 7 may be a quadrangular pyramid-shaped portion 15.

Further, in the present embodiment, the quadrangular pyramid portions 12 and 15 of the outer bottle 2 have a quadrangular pyramid shape having a quadrangular cross section orthogonal to the axis, but the quadrangular pyramid portions 12 and 15 have a cross section orthogonal to the axis. It may be any one of a triangular pyramid having a triangular shape, a pentagonal pyramid having a pentagonal shape, and a hexagonal pyramid having a hexagonal shape. Further, in the polygonal pyramid shape, the vertices of the polygon may be cut, or the vertices of the polygon may be marked with an R, and the side sandwiched between the vertices may be bulged outward. , One or more vertices may be provided on the bulged side.

Further, in the present embodiment, the body portion 6 of the outer bottle 2 is gradually reduced in diameter from the lower end portion of the step portion 6a connected to the shoulder portion 5 toward the central portion 6c, and the step portion connected to the bottom portion 7 from the central portion 6c. Although the body portion 6 has a drum shape that gradually increases in diameter toward the upper end portion of 6b, the body portion 6 may have a cylindrical shape having the same diameter from the lower end portion of the step portion 6a to the upper end portion of the step portion 6b.

Further, in the present embodiment, the outer peripheral surface of the outer opening portion 4 is provided with the male threaded portion 10, but the outer opening portion 4 may be a simple cylindrical shape without the male threaded portion 10, and is to be used in this way. Therefore, for example, it can be applied to a stopper-type mouth portion of a soy sauce bottle or the like.

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

Claims (3)

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. a possible original return for, shoulder portion part which connects to the outer mouth is the polygonal pyramid, multi with gradually enlarged toward the cylinder portion from the partial below the polygonal pyramid portion comprising a body portion upper cross section of the corner of the pyramid is orthogonal to axis becomes smooth can lead to the body portion is circular, said bottom is on the extension portion connected to the grounding portion of the polygonal pyramid shaped ridge of the shoulder portion Ru comprising a ridge leading to, has a polygonal pyramid portion, the shaft angle of the pyramid becomes smooth while gradually enlarged toward the cylinder portion from above multi pyramidal portion of the multi pyramidal portion An outer bottle with a lower part of the body that connects to the body with a circular cross section,
A cylindrical inner mouth portion arranged on the inner peripheral side of the cylindrical outer mouth portion of the outer bottle, and an inner container body main body having a shape connected to the inner mouth portion and conforming to the inner surface shape of the outer bottle are provided. , The inner container that deforms due to external pressure,
A synthetic resin multi-layer 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 bottle and the inner container body. In the synthetic resin multiple bottle according to claim 1, the body portion gradually reduces in diameter from the portion connected to the shoulder portion toward the central portion, and gradually increases in diameter from the central portion toward the portion connected to the bottom portion. A multi-layered bottle made of synthetic resin, which is characterized by being drum-shaped. The synthetic resin multiplex bottle according to claim 1 or 2, wherein the body portion is provided with a plurality of ribs along the axial direction.

Images