JP2018002275A - Synthetic resin multiple bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic resin multiple bottle which is easily produced and can reduce a residual liquid of a content.SOLUTION: A synthetic resin multiple bottle 1 has an outline bottle 2 and an inner container body 3. The outline bottle 2 has an outer mouth portion 4, a shoulder portion 5, a body portion 6, a bottom portion 7 and a ground portion 9 and can return to its original shape with respect to an external pressure, the shoulder portion 5 has at least a portion connected to the outer mouth portion 4 having a polygonal pyramid shape, the body portion 6 has a cross section having a circular shape, and the bottom portion 7 has such a polygonal pyramid shape that at least a portion connected to the ground portion 9 has a ridge line connected to an extension of a ridge line of the polygon pyramid shape of the shoulder portion 5. The inner container body 3 has a cylindrical inner mouth portion 17 arranged on an inner peripheral side of the outer mouth portion 4 and an inner container body 18 having a shape along the inner surface shape of the outline bottle 2. The inner container body has a ventilation passage 23 formed between the outer mouth portion 4 and the inner mouth portion 17.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a synthetic resin multiple bottle.

  2. Description of the Related Art Conventionally, an inner container body that is deformed by volume reduction due to external pressure (hereinafter sometimes referred to as “volumetric deformation”) is disposed inside an outer bottle that can be restored to its original shape against external pressure, and the outer bottle and the inner container Synthetic resin multiple bottles are known in which outside air is introduced between the body and the body.

  The synthetic resin multiplex bottle presses the body portion of the outer bottle, thereby reducing the volume of the inner container body and discharging the contents contained in the inner container body, while the pressure is released. Outside air is introduced between the outer bottle and the inner container body by the action of a check valve provided separately. As a result, the outer bottle is restored to its original shape by the external air pressure, while the inner container body is maintained in the volume-reduced deformation state. When doing so, since the outside air does not enter the inner container body, the contents stored in the inner container body can be prevented from being altered by oxidation or the like.

  By the way, when the inner container body is deformed and deformed as described above, the synthetic resin multiple bottle is deformed in the length direction or the radial direction of the body portion of the inner container body (in the case of a square bottle, the width). (Direction), the content is not sufficiently poured out, and there is a problem that the remaining liquid may not be much.

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

Japanese Patent No. 3872651

  However, the conventional multiple bottle has a disadvantage that the manufacturing method becomes complicated because a concave portion 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 multi-bottle made of synthetic resin which can eliminate such disadvantages and can be easily manufactured to reduce the residual liquid of the contents.

  In order to achieve such an object, the synthetic resin multiple bottle of the present invention comprises a cylindrical outer opening, a shoulder connected to the outer opening, a body connected to the shoulder, and a body connected to the body. A bottom part connected to the bottom part, and a grounding part connected to the bottom part, and can be restored to its original shape against an external pressure, and at least a part of the shoulder part connected to the outer port part has a polygonal pyramid shape; A cross-section perpendicular to the axis is circular, and the bottom portion is a polygonal pyramid-shaped bottle having a ridge line continuous with an extension of the ridge line of the polygonal pyramid shape of the shoulder at least a portion connected to the grounding portion; A cylindrical inner mouth portion disposed on the inner peripheral side of the cylindrical outer mouth portion of the outer bottle, and an inner container body main body connected to the inner mouth portion and conforming to the inner surface shape of the outer bottle, An inner container body deformed by an external pressure, and formed between the outer mouth part and the inner mouth part, between the outer bottle and the inner container body Characterized in that it comprises a ventilation passage for introducing the gas.

  The multiple bottle made of the synthetic resin of the present invention having the above-described configuration is configured such that the inner container body of the inner container body is pressed by pressing the body portion of the outer bottle with the outer mouth portion and the inner mouth portion facing downward. The contents are poured out after volume reduction. Next, when the pressing of the body portion of the outer bottle is released, outside air is introduced from the air passage between the outer bottle and the inner container body, and the outer bottle returns to its original shape by the external pressure. The inner container body main body is maintained in a state of being reduced in volume.

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

  In the multiple bottle made of synthetic resin 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 follows the inner shape of the outer bottle. . Therefore, the valley deformation, the portion corresponding to the polygonal pyramid-shaped ridge line in the inner container body acts as a rib, the strength is greater than the side portion corresponding to the portion sandwiched between the ridge lines, the strength is higher This is thought to start by forming a valley fold in the side surface portion having a small diameter.

  In the multiple bottle made of the synthetic resin of the present invention, the content gradually decreases by repeating the pressing of the barrel portion of the outer bottle and the release of the pressing, and the content of the inner container body is reduced as the content decreases. Valley deformation progresses. The valley deformation of the inner container body proceeds from the outer side of the inner container body toward the inside in the width direction, starting from the portion corresponding to the portion connected to the ground contact portion of the bottom of the outer bottle, In the vertical direction, it proceeds from the portion corresponding to the portion connected to the ground contact portion at the bottom of the outer bottle toward the inner opening.

  When the content further decreases, the valley deformation of the inner container body reaches a portion corresponding to the portion connected to the outer mouth portion of the shoulder portion of the outer bottle. At this time, the polygonal pyramid-shaped ridgeline connected to the outer opening of the shoulder portion is on the extension of the polygonal-pyramidal ridgeline connected to the ground contact portion of the bottom. Accordingly, the valley deformation in the inner container body proceeds toward the side surface corresponding to the portion sandwiched between the polygonal pyramid-shaped ridgelines connected to the outer mouth portion of the shoulder portion.

  At this time, the portion corresponding to the polygonal pyramid-shaped ridgeline of the portion connected to the outer mouth portion of the shoulder portion in the inner container body body corresponds to the polygonal pyramid-shaped ridgeline of the portion connected to the grounding portion of the bottom portion. Acts as a rib like the part. Therefore, the portion corresponding to the polygonal pyramid-shaped ridge line of the portion connected to the outer mouth portion of the shoulder portion in the inner container body is stronger than the side surface portion corresponding to the portion sandwiched between the ridge lines. The portion easily folds in a form continuous with the valley fold deformation.

  As a result, the valley deformation is the entire inner container body main body, in the diagonal direction from the outer side of the inner container body toward the inner side, and in the length direction, the portion that is connected to the grounding portion at the bottom of the outer bottle. It progresses toward the inner opening from the part corresponding to, thereby reducing the remaining liquid of the contents.

  Moreover, the multiple bottle made from a synthetic resin of this invention is provided with the shape where the said inner container body follows the internal shape of the said outer bottle as mentioned above. Therefore, the synthetic resin multiplex 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 for forming the outer bottle is stacked on the preform for forming the inner container body. Thus, it can be easily manufactured by blow molding all at once.

  In the multiple bottle made of the synthetic resin of the present invention, at least the portion of the outer bottle connected to the outer mouth portion needs to be a polygonal pyramid shape, and the whole need not be a polygonal pyramid shape. In this case, the shoulder may have a circular cross section perpendicular to the axis at a portion connected to the body.

  Further, in the multiple bottle made of synthetic resin of the present invention, at least the portion connected to the grounding portion of the bottom portion of the outer bottle only needs to be a polygonal pyramid, and the whole need not be a polygonal pyramid. In this case, the bottom portion may be circular in cross section perpendicular to the axis at a portion connected to the body portion.

  Further, in the multiple bottle made of synthetic resin of the present invention, the barrel portion has a round bottle shape in which the cross section perpendicular to the axis is a circle, so that it can be placed at any position of the barrel portion when gripping compared to the square bottle shape. It can be gripped and squeezed (smoothly press-deformed by hand pressing force and then smoothly returns to its original shape when the pressing force is released), and there is no problem of label positioning when affixing the label to the bottle. Sex can be obtained. At this time, the body portion may have a cylindrical shape having a cross section perpendicular to the axis from the portion connected to the shoulder portion to the portion connected to the bottom portion, but from the portion connected to the shoulder portion to the center. It is preferable to have a drum shape that gradually decreases in diameter toward the portion and gradually increases in diameter from the central portion toward the portion connected to the bottom portion.

  The trunk portion is the drum shape whose central portion has a small diameter with respect to a portion connected to the shoulder portion or the bottom portion, so that the drum portion is gripped and pressed easily or pressed. Can be released. As a result, the multiple bottle made of the synthetic resin of the present invention can obtain excellent squeeze properties (property that is smoothly pressed and deformed by a hand pressing force and smoothly returns to its original shape when the pressing force is released).

  Moreover, in the multiple bottle made of synthetic resin of the present invention, it is preferable that the body portion includes a plurality of ribs along the axial direction. In the multiple bottle made of synthetic resin of the present invention, since the body portion includes the plurality of ribs, the body portion can be easily gripped, and excellent squeeze properties can be obtained.

The perspective view which shows the structure of the multiple bottle made from a synthetic resin of this invention. II-II sectional view taken on the line of FIG. The III-III end view of FIG. The perspective view which shows the use condition of the synthetic resin multiple bottle of this invention. A is a cross-sectional view taken along line AA in FIG. 4, and B is a cross-sectional view taken along line BB in 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, a synthetic resin multiple bottle 1 according to this embodiment includes an outer bottle 2 that can be restored to its original shape against an external pressure, and an inner container body that is accommodated inside the outer bottle 2 and is deformed by the external pressure. It consists of three.

  The outer bottle 2 includes a cylindrical outer opening 4, a shoulder 5 connected to the outer opening 4, a body 6 connected to the shoulder 5, and a bottom 7 connected to the body 6. The bottom portion 7 is provided with a concave portion 8 that swells inside the outer bottle 2 on the inner peripheral side and imparts self-supporting property to the synthetic resin multiple bottle 1, and a grounding portion 9 is provided between the bottom portion 7 and the concave portion 8. Yes.

  The outer mouth portion 4 includes a male screw portion 10 and a support ring 11 on the outer peripheral surface, and the shoulder portion 5 has a quadrangular pyramid portion 12 at a portion in contact with the outer mouth portion 4. A body upper part 13 is provided which gradually increases in diameter from the quadrangular pyramid part 12 toward the body part 6 and has smooth corners and is connected to the cylindrical body part.

  The trunk portion 6 has a circular cross section orthogonal to the axis, and is connected to the shoulder portion 5 through the step portion 6a, and is connected to the bottom portion 7 through the step portion 6b. The stepped portion 6 a is gradually reduced in diameter from the shoulder portion 5 toward the trunk portion 6, and the stepped portion 6 b is gradually reduced in diameter from the bottom portion 7 toward the trunk portion 6.

  Further, the body portion 6 gradually decreases 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 toward the upper end portion of the step portion 6b connected to the bottom portion 7 from the central portion 6c. It has a drum shape that expands in diameter. Moreover, the trunk | drum 6 is provided with the some rib 14 along the axial direction, and the rib 14 is formed over the perimeter of the trunk | drum 6, as shown in FIG.

  The bottom portion 7 has a quadrangular pyramid portion 15 that is in contact with the grounding portion 9. The diameter of the bottom portion 7 gradually increases from the quadrangular pyramid portion 15 toward the trunk portion 6 above the quadrangular pyramid portion 15. Is provided with a lower body portion 16 that is smooth and connected to the cylindrical body portion.

  Each of the quadrangular pyramid portions 12 and 15 has a quadrangular cross section perpendicular to the axis, and an apex is provided with an R. The apexes are provided with ridge lines 12a and 15a. Here, the ridge line 15a continues 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 disposed on the inner peripheral side of the outer mouth portion 4 and the inner mouth portion 17, and the shoulder portion 5, the trunk portion 6, and the bottom portion 7 of the outer bottle 2. And the inner container body 18 having a shape that conforms to the inner surface of the concave portion 8 and the grounding portion 9. The inner mouth part 17 includes an extension part 19 extending upward from the upper end of the outer mouth part 4 and a flange part 20 projecting radially outward from the extension part 19 at the upper part. The part 20 is locked to the upper end edge of the outer opening part 4.

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

  The multiple bottle 1 made of synthetic resin can be manufactured, for example, by placing an inner preform forming the inner container body 3 inside the outer preform forming the outer bottle 2 and performing blow molding. The blow molding can be performed by a known method using a known blow molding apparatus.

  Next, with reference to FIG. 4, FIG. 5A, and FIG. 5B, the use condition and effect of the synthetic resin multiple bottle 1 of this embodiment are demonstrated.

  In the multi-bottle 1 made of synthetic resin of the present embodiment, the contents not shown are accommodated in the inner container body 3, and when the contents are poured out, as shown in FIG. The part 17 is tilted downward. When the body 6 of the outer bottle 2 is gripped and pressed, the inner container body 18 is deformed and deformed, whereby the contents are poured out. In the multi-bottle 1 made of synthetic resin, the barrel portion 6 has a circular cross section orthogonal to the axis, so that it can be pressed against the axis from any direction, and the barrel portion 6 has a drum shape along the axial direction. Since the plurality of ribs 14 formed in this manner are provided, the inner container body 18 can be reduced and deformed by easily grasping the central portion 6c, and excellent squeeze properties can be obtained.

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

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

  In the multiple bottle 1 made of synthetic resin of the present embodiment, a portion connected to the grounding portion 9 of the bottom portion 7 of the outer bottle 2 is a quadrangular pyramid portion 15, and the inner container body 18 has an inner shape of the outer bottle 2. It has a shape along. Therefore, in the valley folding deformation, the portion corresponding to the ridge line 15a in the inner container body 18 acts as a rib, and the strength is larger than the side surface portion 18a corresponding to the portion sandwiched between the ridge lines 15a, 15a. As indicated by the phantom line, it is considered that the process starts when a valley fold portion 18b is formed at the center of the side portion 18a having a lower strength.

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

  Further, the valley 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 portions 18a and 18b of the inner container body 18 that have undergone valley deformation are separated from the inner surface of the outer bottle 2 as the valley deformation progresses, as shown in FIG. 5A.

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

  Further, at this time, a 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 similarly to a portion corresponding to the ridge line 15a of the quadrangular pyramid portion 15 of the bottom portion 7. Therefore, the strength is greater than that of the side surface portion 18a corresponding to the portion sandwiched between the ridgelines 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 folded into a valley and the valley fold portion 18b is formed in a form continuous with the valley fold portion deformation. The portions 18a and 18a are in contact with each other and deformed into a cross-shaped cross-section.

  As a result, the valley deformation is caused by the square cone-shaped portion of the bottom 7 of the outer bottle 2 in the length direction from the outside to the inside of the inner container body 18 in the width direction and in the length direction. 15 will proceed from the portion corresponding to 15 toward the inner mouth portion 17, so that the contents stored in the inner container body 18 can be poured out without any excess, and the remaining 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 the quadrangular pyramid portion 12, but the entire shoulder portion 5 may be the quadrangular pyramid portion 12. Moreover, in this embodiment, although the part connected to the grounding part 9 of the bottom part 7 in the outer bottle 2 is the quadrangular pyramid part 15, the entire bottom part 7 may be the quadrangular pyramid part 15.

  In the present embodiment, the quadrangular pyramid portions 12 and 15 in the outer bottle 2 have a quadrangular pyramid shape in which the cross section orthogonal to the axis is a quadrilateral shape, but the quadrangular pyramid portions 12 and 15 have a cross section orthogonal to the axis. Any one of a triangular pyramid shape that is a triangular shape, a pentagonal pyramid shape that is a pentagonal shape, and a hexagonal pyramid shape that is a hexagonal shape may be used. In addition, the polygonal pyramid may have a polygonal vertex cut off or a polygonal vertex with an R, and the sides sandwiched between the vertexes may bulge outward. One or more vertices may be provided on the bulged side.

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

  Furthermore, in this embodiment, it is set as the structure provided with the external thread part 10 in the outer peripheral surface of the outer opening part 4, However, The outer opening part 4 may be a mere cylindrical shape which is not provided with the external thread part 10, and does in this way. For example, it can be applied to a plug-type mouth portion such as a soy sauce bottle.

  DESCRIPTION OF SYMBOLS 1 ... Synthetic resin multiple bottle, 2 ... Outer bottle, 3 ... Inner container body, 4 ... Outer mouth part, 5 ... Shoulder part, 6 ... Trunk part, 7 ... Bottom part, 9 ... Grounding part, 17 ... Cylindrical inner mouth Part, 18 ... inner container body, 23 ... vent.

Claims (3)

A cylindrical outer opening, a shoulder connected to the outer opening, a body connected to the shoulder, a bottom connected to the body, and a grounding part connected to the bottom, The shoulder can be restored to its original shape, at least the portion connected to the outer opening is a polygonal pyramid, the trunk is circular in cross section perpendicular to the axis, and the bottom is at least the grounding portion. An outer bottle having a polygonal pyramid shape including a ridgeline continuous with an extension of the ridgeline of the polygonal pyramid shape of the shoulder,
A cylindrical inner opening disposed on the inner peripheral side of the cylindrical outer opening of the outer bottle, and an inner container body connected to the inner opening and conforming to the inner surface of the outer bottle. An inner container body deformed by external pressure;
A synthetic resin multi-bottle characterized by comprising an air passage formed between the outer opening and the inner opening for introducing outside air between the outer bottle and the inner container body.   2. The multiple bottle made of synthetic resin according to claim 1, wherein the body portion gradually decreases in diameter from a portion connected to the shoulder portion toward a center portion, and gradually increases in diameter from the center portion toward a portion connected to the bottom portion. Synthetic resin multi-bottle characterized by a drum shape.   The synthetic resin multiplex bottle according to claim 1 or 2, wherein the barrel includes a plurality of ribs along an axial direction.