JP5238362B2 - Inner container and double container - Google Patents

Description

  The present invention relates to a bottomed cylindrical inner container in which a filled content is discharged to the outside by being volume-reduced and deformed.

As this type of inner container, a bottomed cylindrical inner container as shown in Patent Document 1 below is known.
JP 2000-128161 A

  By the way, in recent years, there has been an increasing demand for improving the discharge efficiency by facilitating the volume reduction deformation of the inner container.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the inner container which can discharge a content efficiently, and a double container provided with this inner container.

In order to solve the above problems, the present invention proposes the following means.
The inner container according to the present invention is a bottomed cylindrical inner container in which the filled contents are discharged to the outside by being volume-reduced and deformed, and is bent at the body part when the volume is deformed. A large number of folding lines are formed over the entire area, and the numerous folding lines are formed so as to have a mesh shape in the side view when viewed from the side .

  According to the inner container of the present invention, since the bending line is formed in a large number across the entire area of the body portion, the bending line has a diameter when a force for volume reduction deformation is applied to the inner container. The body portion can be deformed and deformed while being bent so as to be pointed inward or outward. Therefore, it is possible to greatly reduce the volume of the body part, and it is possible to improve the discharge efficiency of the contents.

In addition , since a large number of folding lines are formed in the body portion so as to have a mesh shape in a side view, when a force for volumetric deformation is applied to the inner container, one of the many folding lines is formed. When the portion starts to bend, it becomes possible to easily propagate the bending deformation to other folding lines connected to the folding line. Therefore, it becomes easier to reduce the volume of the body part, and the discharge efficiency of the contents can be reliably improved.

  Further, in the inner container according to the present invention, the body portion includes a main body portion formed by rounding the film material into a cylindrical shape so that both circumferential end portions thereof face each other or face each other, and the both circumferential end portions. It is preferable that the bridge portions are connected to each other and extend along the axial direction, and the bridge portions are formed integrally with the mouth portion and the bottom portion.

In this case, the mouth portion and the bottom portion are connected by the bridging portion and are integrally formed, so that the number of parts of the inner container can be reduced.
Furthermore, when the inner container is formed, the mouth portion, the bottom portion and the bridging portion are formed by insert molding using the cylindrically rolled film material as an insert product. Both peripheral ends can be connected by a bridging portion, and the manufacturing efficiency of the inner container can be improved.

  Further, the double container according to the present invention is provided with a bottomed cylindrical inner container filled with the contents, an outer container in which the inner container is installed, and the mouth side of the inner container. A double container provided with a discharge device for discharging an object, wherein the inner container is the inner container according to the present invention.

According to the double container according to the present invention, since the inner container according to the present invention is provided, the contents can be discharged efficiently.
In addition, since the inner container is built in the outer container, even if an unexpected external force is applied to the double container, the outer container receives the external force, so that the body portion of the inner container is caused by the external force. Can be prevented from being deformed or torn.
Moreover, since the discharge device is provided, the contents can be easily discharged from the inner container.

  According to the inner container and the double container including the inner container according to the present invention, the contents can be discharged efficiently.

Hereinafter, a double container according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1, the double container 1 according to this embodiment includes an inner container 2 filled with contents, an outer container 3 in which the inner container 2 is installed, and a mouth 4 side of the inner container 2. And a discharger 5 for discharging the contents. Furthermore, the double container 1 according to this embodiment includes a cover cap 6.

  In the double container 1 of the present embodiment, the inner container 2 is formed in a bottomed cylindrical shape, and the outer container 3 is formed in a cylindrical shape, and the central axes of the inner container 2 and the outer container 3 are on a common axis. It is assembled and configured in the state where it is located in. Hereinafter, the common axis is referred to as a container axis L, and the mouth 4 side of the inner container 2 along the container axis L is referred to as the upper side, and the bottom 38 side is referred to as the lower side.

  A male screw is formed on the outer peripheral surface of the upper end portion of the outer container 3. For example, an opaque cylinder may be employed as the outer container 3. In this case, the body portion 35 of the inner container 2 can be prevented from being seen from the outside through the outer container 3.

The cover cap 6 is formed in a multistage cylindrical shape, is screwed onto the male screw of the outer container 3, and is disposed coaxially with the container axis L. The cover cap 6 includes a large-diameter portion 7 having an internal thread formed on the inner peripheral surface, a medium-diameter portion 8 having a smaller diameter than the large-diameter portion 7, and a small-diameter portion 9 having a smaller diameter than the medium-diameter portion 8. It is connected in this order toward.
On the lower surface of the step portion 10 that connects the medium diameter portion 8 and the small diameter portion 9, a cylindrical inner tube portion 11 is provided so as to protrude coaxially with the container shaft L with a gap between the medium diameter portion 8 and the inner diameter portion 8. ing. The inner cylinder portion 11 is fitted in the mouth portion 4 of the inner container 2 in a liquid-tight manner.

  The discharger 5 is attached to the small diameter portion 9 of the cover cap 6. The discharger 5 includes a mounting cap 12, a cylinder 13, a stem 14, a piston 15, a pressing head 16, a coil spring 17, and a valve member 18.

  The mounting cap 12 is formed in a multistage cylindrical shape, is fitted to the outer peripheral surface of the small diameter portion 9 of the cover cap 6, and is disposed coaxially with the container shaft L. The mounting cap 12 has a ceiling wall portion 19 with a circular opening formed in the center, and extends downward to the outer edge of the ceiling wall portion 19 and is fitted to the small diameter portion 9 of the cover cap 6. A cylindrical portion 20 and an upper cylindrical portion 21 extending upward from the periphery of the opening formed in the top wall portion 19 are provided.

  The cylinder 13 is formed in a multistage cylindrical shape and is disposed coaxially with the container axis L. The cylinder 13 includes a large-diameter portion 22 projecting downward from the inside of the mounting cap 12, a small-diameter portion 23 having a smaller diameter than the large-diameter portion 22, a tapered portion 24 having a diameter reduced toward the bottom, and a tapered portion. An inflow portion 25 protruding downward from 24 is connected in this order from the top to the bottom. At the upper end of the large-diameter portion 22, a flange portion 26 protruding outward in the radial direction is formed over the entire circumference, and this flange portion 26 forms the lower surface of the top wall portion 19 of the mounting cap 12 and the cover cap 6. It is fixed by being sandwiched between the upper edge opening edge. Further, the lower end opening of the inflow portion 25 is disposed in the inner container 2. A pedestal portion 27 that supports the lower end of the coil spring 17 is formed on the inner peripheral surfaces of the small diameter portion 23 and the tapered portion 24.

  The stem 14 is formed in a cylindrical shape and is disposed coaxially with the container axis L. The stem 14 is inserted into the upper cylindrical portion 21 of the mounting cap 12, the upper portion thereof projects upward from the upper end of the upper cylindrical portion 21, and the lower portion thereof is disposed within the large diameter portion 22 of the cylinder 13. Yes. In addition, an opening 14a for distributing contents is formed in the lower portion of the stem 14, and an outer flange portion 28 protruding outward in the radial direction is formed in the lower end portion of the stem 14 over the entire circumference. Yes. The outer flange portion 28 is disposed away from the pedestal portion 27 of the cylinder 13 upward.

  A cylindrical piston 15 is disposed coaxially with the container shaft L on the upper surface of the outer flange portion 28. A coil spring 17 that biases the stem 14 and the piston 15 upward is interposed between the lower surface of the outer flange portion 28 and the pedestal portion 27 of the cylinder 13.

  The pressing head 16 is attached to the upper end portion of the stem 14. The pressing head 16 has a ceiling wall portion 29 extending in a direction perpendicular to the container axis L, an outer cylinder portion 30 extending downward from the outer edge portion of the ceiling wall portion 29, and a lower surface of the ceiling wall portion 29. An inner cylinder portion 31 extending toward the outer periphery, and a nozzle 32 projecting radially outward from the outer peripheral surface of the upper end portion of the outer cylinder portion 30 and communicating with the inside of the inner cylinder portion 31. ing. The upper end portion of the stem 14 is fitted inside the inner cylinder portion 31. Further, a gap is formed between the outer cylinder part 30 and the inner cylinder part 31, and when the pressing head 16 is pushed down, the upper cylinder part 21 of the mounting cap 12 is inserted into the gap.

The valve member 18 is a rod-like member for closing the lower end portion of the cylinder 13 and is inserted into the coil spring 17. The upper end portion of the valve member 18 is inserted into the lower end portion of the stem 14. A lower valve body 33 having an enlarged diameter is formed at the lower end of the valve member 18. The lower valve body 33 can be seated and separated from the inner peripheral surface of the lower end portion of the tapered portion 24 of the cylinder 13.
Moreover, the overcap 34 is provided so that the discharge device 5 mentioned above may be covered from upper direction. The lower portion of the overcap 34 is detachably fitted to the lower cylinder portion 20 of the mounting cap 12.

The inner container 2 is subjected to volume reduction deformation so that the filled contents are discharged to the outside.
And in this embodiment, as shown in FIGS. 1-3, the trunk | drum 35 in the inner container 2 is rounded cylindrically so that a film material may be faced | matched or made mutually opposed. The main body portion 36 is formed, and the bridging portion 37 that extends along the container axis L is provided.

  In the illustrated example, the inner container 2 includes a mouth portion 4 formed in a cylindrical shape thicker than the main body portion 36, and a bottom portion 38 formed in a cup shape thicker than the main body portion 36. The outer peripheral surface of the upper end portion of the main body portion 36 is bonded to the inner peripheral surface of the lower end portion of the mouth portion 4, and the inner peripheral surface of the lower end portion of the main body portion 36 is bonded to the outer peripheral surface of the peripheral wall portion 38 b of the bottom portion 38. Has been. The inner container 2 is supported by the outer container 3 with the lower end edge of the mouth portion 4 being in contact with the upper end edge of the outer container 3. The mouth 4 and the bottom 38 are made of the same material (for example, a resin material such as polyethylene terephthalate). Further, each thickness of the mouth portion 4 and the bottom portion 38 is thicker than that of the main body portion 36.

  The thickness of the main body 36 is, for example, 0.5 mm or less, preferably 0.1 mm to 0.2 mm or less. As the film material forming the main body portion 36, for example, a configuration in which a plurality of films are laminated may be adopted. In this case, the mouth portion 4 and the bottom portion 38 are formed with a film positioned at least on the outermost radial direction. The film formed of the same material as that of the material and positioned on the radially inner side may be formed of a material having a gas barrier property, a light shielding property, or the like in accordance with the properties of the contents.

  As shown in FIGS. 2 and 3, the bridging portion 37 is formed integrally with the mouth portion 4 and the bottom portion 38. The bridging portion 37 is formed in a rectangular plate shape that is long in the container axis L direction, and the upper end thereof is connected to the inner peripheral edge portion at the lower end edge of the mouth portion 4, and the lower end is connected to the outer peripheral edge portion of the bottom surface 38 a of the bottom portion 38. Yes. Note that the lower end of the bridging portion 37 is connected to a portion of the bottom surface 38a that is located radially outward from the peripheral wall portion 38b, and the gap between the bridging portion 37 and the peripheral wall portion 38b is a lower end portion of the main body portion 36. It is filled with. In addition, the size of the bridging portion 37 in the direction along the circumferential direction of the inner container 2 is about 1/10 of the circumferential length of the entire body portion 35, and the thickness of the bridging portion 37 is the thickness of the body portion 36. It is equal to or slightly thicker than the wall thickness.

  Furthermore, as shown in FIG. 2, a large number of folding lines 40 are formed in the body portion 35 so as to be bent at the time of volumetric deformation. Further, the large number of bent lines 40 are formed in the body portion 35 so as to have a mesh shape in a side view.

These folding lines 40 are wrinkles that remain when, for example, the inner container 2 is pressed in the container axis L direction to crush the body part 35 and then the body part 35 is extended in the container axis L direction and returned to its original position. It has become.
In FIGS. 1 and 2, the body portion 35 is illustrated in a state where both the inner peripheral surface and the outer peripheral surface are straightened. However, the portion where the bending line 40 is located in the body portion 35 is illustrated in FIG. It may be slightly bent in the radial direction.

Next, a method for manufacturing the inner container 2 formed as described above will be described.
First, the film material is rounded and formed into a cylindrical shape so that both peripheral end portions thereof face each other or face each other, and then the cylindrical body is inserted into a mold cavity. At this time, the outer peripheral surface of the cylindrical body may be vacuum-sucked on the inner peripheral surface of the cavity. In this case, prior to inserting the cylindrical body into the cavity, for example, no pre-processing such as bonding the two peripheral ends of the cylindrical body is required.

Next, molten resin is injected into the cavity to integrally form the mouth portion 4, the bottom portion 38, and the bridging portion 37. At this time, both peripheral ends of the film material are connected by the bridging portion 37.
Next, after pressing the inner container 2 in the container axis L direction to crush the main body 36 and the bridging part 37, that is, the entire body part 35, the body part 35 is extended in the container axis L direction and returned to its original state. A wrinkle is formed in the body portion 35 by the above.
This wrinkle becomes the folding line 40, and the inner container 2 described above is formed.

Next, an example of how to use the double container 1 formed as described above will be described.
First, the overcap 34 is removed and the pressing head 16 is pushed down. As a result, the stem 14 and the piston 15 move downward together with the pressing head 16 and are pushed into the cylinder 13.

  At this time, since the lower valve body 33 of the valve member 18 is seated on the inner peripheral surface of the lower end portion of the tapered portion 24 of the cylinder 13 and closes the lower end of the tapered portion 24, the stem 14 and the piston 15 are closed as described above. The cylinder 13 is pressurized by moving downward. As a result, the content in the cylinder 13 flows upward from the outer peripheral surface side of the outer flange portion 28 of the stem 14 and flows into the stem 14 through the upper surface side of the outer flange portion 28 and the opening 14a of the stem 14. To do. The contents in the stem 14 circulate upward, reach the inner cylinder portion 11 of the pressing head 16, flow into the nozzle 32 from the inner cylinder portion 11, and are discharged from the tip of the nozzle 32.

  After the contents in the cylinder 13 are discharged to the outside in this way, when the push-down head 16 is released, the stem 14 and the piston 15 that have been pushed down are pushed upward together with the valve member 18 by the coil spring 17. As a result, the inside of the cylinder 13 is depressurized. For this reason, the contents in the inner container 2 flow into the cylinder 13 through the inflow portion 25.

  At this time, since the inside of the inner container 2 is also depressurized, the inner container 2 is subjected to a force for volumetric deformation. In the present embodiment, first, a part of the large number of folding lines 40 starts to bend so that the folding lines 40 are sharpened inward or outward in the radial direction. Is propagated to the other folding lines 40 connected to the folding line 40. As a result, when the contents are further discharged and the inner container 2 is reduced in volume, the bottom portion 38 rises while the entire body portion 35 is deformed in a bellows shape as shown by a two-dot chain line in FIG. .

  As described above, according to the inner container 2 according to the present embodiment, a large number of the bending lines 40 are formed in the entire body portion 35 over the entire region, so that the inner container 2 can be deformed and reduced in volume. When this occurs, the body 35 can be reduced in volume while being bent so that the bent line 40 is sharpened inward or outward in the radial direction. Accordingly, the body portion 35 can be greatly reduced in volume and deformed, and the content discharge efficiency can be improved.

  In addition, since a large number of folding lines 40 are formed in the body portion 35 so as to have a mesh shape when viewed from the side, a large number of the folding lines 40 are applied when a force for volumetric deformation is applied to the inner container 2. When a part of them starts to bend, it becomes possible to easily propagate this bending deformation to other folding lines 40 connected to the folding line 40. Therefore, it becomes easier to reduce the volume of the body portion 35, and the discharge efficiency of the contents can be reliably improved.

Moreover, since the opening | mouth part 4 and the bottom part 38 are connected by the bridge | bridging part 37 and are integrally formed, the number of parts of the inner container 2 can be reduced.
Further, when the inner container 2 is formed, the mouth portion 4, the bottom portion 38, and the bridging portion 37 are formed by insert molding using the film material rounded into a cylindrical shape as an insert product. It becomes possible to connect both peripheral ends of the rounded film material with the bridging portion 37, and the manufacturing efficiency of the inner container 2 can be improved.
As described above, since the folding line 40 is formed in the body portion 35 and the body portion 35 is easily deformed by volume reduction, the body portion 35 is provided with the bridging portion 37. It is possible to prevent the body portion 35 from becoming difficult to be deformed by volume reduction.

Moreover, according to the double container 1 which concerns on this embodiment, since the said inner container 2 is provided, the contents can be discharged efficiently.
Further, since the inner container 2 is built in the outer container 3, even if an unexpected external force is applied to the double container 1, the external container 3 can receive the external force, thereby causing the contents to be caused by the external force. It is possible to prevent the body portion 35 of the vessel 2 from being deformed or torn.
Moreover, since the discharge device 5 is provided, the contents can be easily discharged from the inner container 2.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, although the bridging portion 37 is provided in the body portion 35 in the above embodiment, the bridging portion 37 may not be provided.
Furthermore, even when the bridging portion 37 is provided, the bridging portion 37 is not limited to the portion where both peripheral end portions of the film material are located. For example, the bridging portion 37 is provided at a plurality of locations of the main body portion 36. May be provided.

  Moreover, in the said embodiment, although the inner container 2 was formed by insert molding, you may form by another method. Moreover, you may form the trunk | drum 36 with one film material.

In the above-described embodiment, the folding line 40 is formed so as to have a mesh shape in a side view, but may be formed over the entire region of the body portion 35.
Furthermore, in the said embodiment, although the bending line 40 is formed also in the bridge | bridging part 37, if the bending line 40 is formed in the main-body part 36, it will not restrict to this. In this case, for example, the folding line 40 may be formed by pressing the film material against the outer peripheral surface of a roller having a protrusion prior to rolling as described above.

  Moreover, in the said embodiment, although it was set as the double container 1 provided with the inner container 2, the outer container 3, the discharge device 5, and the cover cap 6, the inner container 2 and the cap with which the opening | mouth part 4 of the inner container 2 was mounted | worn It does not matter as a container with a cap. Even when the contents in the inner container 2 of the double container 1 have been discharged, the inner container 2 can be replaced with a new inner container 2 filled with the contents. Further, the contents may be discharged from the mouth portion 4 without using the discharge device 5 in a state where the cap of the container with cap is removed.

  Moreover, in the said embodiment, although the double container 1 is provided with the outer container 3, the lower cylinder part 20 of the discharger 5 is detachably fitted to the mouth part 4 of the inner container 2, or screwed together. Therefore, a container with a discharger including the inner container 2 and the discharger 5 may be used. According to this container with a discharger, since the discharger 5 is directly attached to the inner container 2, the sealing property between them can be improved.

  Moreover, in the said embodiment, although the shape of the outer container 3 was made into cylindrical shape, a bottomed cylindrical shape may be sufficient. Furthermore, if the shape of the outer container 3 is cylindrical, it is not limited to a cylindrical shape.

  In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

It is a half longitudinal section of a double container concerning one embodiment of the present invention. It is a side view of the inner container shown in FIG. It is the X section enlarged view of the inner container shown in FIG. 1 and FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Double container 2 Inner container 3 Outer container 4 Mouth part 5 Discharger 35 Body part 36 Main-body part 37 Bridge | crosslinking part 40 Bending line

Claims (3)

It is a bottomed cylindrical inner container in which the filled contents are discharged to the outside by being volume-reduced and deformed,
A large number of folding lines that are bent at the time of volume reduction deformation are formed on the entire body ,
A large number of the bent lines are formed in the body portion so as to have a mesh shape in a side view . The inner container according to claim 1 ,
The body portion connects the body portion, which is rounded into a cylindrical shape so that both circumferential end portions thereof face each other or face each other, and the both circumferential end portions, and extends in the axial direction. A bridging portion that extends,
The inner container, wherein the bridging portion is formed integrally with the mouth portion and the bottom portion. A bottomed cylindrical inner container filled with contents,
An outer container in which the inner container is installed;
A double container provided on the mouth side of the inner container and provided with a discharger for discharging the contents,
The said inner container is an inner container of Claim 1 or 2, The double container characterized by the above-mentioned.

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