JP2009286478A - Internal container, double container, and method for manufacturing internal container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To decrease the amount of a material used while deterioration in rigidity of a supporting projection is suppressed. <P>SOLUTION: A bottomed cylindrical container is filled with a content F and is used by being internally placed in an external container 3. The container includes a cylindrical barrel part 23 formed so as to be deformable by volume reduction, and a cylindrical opening part side member 24 the whole of which is formed thicker than that of the barrel part by compression molding or injection molding, and which is welded or fused at one end opening part 23a of the barrel part. In the internal container 2, the supporting projection 29 which projects outward in the radial direction and is supported on the upper end opening edge 3a when it is internally placed in the external container, is integrally formed at the opening part side member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bottomed cylindrical inner container that is filled with contents and used in an outer container, a double container including the inner container, and a method for manufacturing the inner container.

As this type of inner container, for example, as shown in Patent Document 1 below, it is provided on the mouth side portion so as to project radially outward, and on the upper end opening edge when it is installed in the outer container. A configuration in which the supporting protrusions to be supported are integrally formed is known.
The entire inner container is integrally formed by, for example, extrusion molding or blow molding.

In recent years, it has been desired to reduce the amount of material used as much as possible, for example, in order to reduce environmental loads or reduce material costs.
JP 2000-128161 A

  However, since the above-described conventional inner container is integrally formed by extrusion molding or blow molding, if the amount of material used is reduced, the entire inner container including the support protrusions must be formed thin. However, the rigidity of the support protrusions is lowered, and it is difficult to stably arrange the inner container on the upper end opening of the outer container.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an inner container capable of reducing the amount of material used while suppressing a decrease in rigidity of the support protrusion, and the inner container. It is to provide a double container and a method for producing the 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 that is filled with contents and used in an outer container, and has a cylindrical trunk formed to be capable of volumetric deformation, A cylindrical mouth-side member that is formed thicker than the barrel by compression molding or injection molding, and is fused or welded to one end opening of the barrel, and the mouth side The member protrudes outward in the radial direction, and is integrally formed with a support protrusion that is supported on the upper end opening edge when the member is installed in the outer container. is there.

  According to the inner container of the present invention, the mouth portion side member is fused or welded to the one end opening of the body portion, and the body portion and the mouth side member are separate members. The thickness can be reduced by a desired amount regardless of the thickness of the body portion. Therefore, the amount of material used can be reduced while suppressing the decrease in rigidity of the support protrusions to the extent that the inner container becomes unstable with respect to the outer container.

  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 amount of material used can be reduced while the inner container is stably disposed with respect to the outer container.
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.

  Moreover, the manufacturing method of the inner container according to the present invention is the manufacturing method of the inner container according to the present invention, wherein the body part forming step for forming the body part, and the mouth side member is compression molded or injection molded. However, it comprises a mouth side member forming step of fusing or welding the mouth side member and the one end opening of the body portion.

According to the inner container manufacturing method of the present invention, the inner container having the above-described effects can be reliably manufactured.
Also, during the mouth side member forming step, the mouth side member and the body are fused or welded while the mouth side member is compression-molded or injection-molded. Compared to the case where the side member and the body are bonded individually, it can be manufactured more efficiently.

According to the inner container of the present invention, it is possible to reduce the amount of material used while suppressing a decrease in the rigidity of the support protrusion.
Moreover, according to the double container which concerns on this invention, the usage-amount of material can be reduced, arrange | positioning an inner container stably with respect to an outer container.
Moreover, according to the manufacturing method of the inner container which concerns on this invention, the said inner container can be manufactured efficiently.

[First Embodiment]
Hereinafter, the double container 1 which concerns on 1st Embodiment of this invention is demonstrated with reference to FIG.1 and FIG.2.
As shown in FIG. 1, the double container 1 according to the present embodiment includes an inner container 2 filled with the content F, an outer container 3 in which the inner container 2 is installed, and the mouth 4 side of the inner container 2. And a discharger 5 for discharging the contents F. Furthermore, the double container 1 according to the present embodiment includes a cover cap 6.

  In the double container 1 of the present embodiment, both the inner container 2 and the outer container 3 are formed in a bottomed cylindrical shape, and each of the central axes is assembled in a state of being positioned on a common axis. Has been. 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 an upper side, and the bottom 25 side is referred to as a lower side.

A male screw is formed on the outer peripheral surface of the upper end portion of 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.

A male screw is formed on the outer peripheral surface of the small diameter portion 9. (This male screw may be screwed in a direction opposite to the screwing direction of the male screw formed in the outer container 3.)
On the lower surface of the first step portion 10 that connects the medium diameter portion 8 and the small diameter portion 9, a cylindrical inner tube portion 11 protrudes coaxially with the container axis L with a gap between the medium diameter portion 8. It is installed. The inner cylinder portion 11 is fitted in the mouth portion 4 of the inner container 2 in a liquid-tight manner. The second step portion 8a that connects the large-diameter portion 7 and the medium-diameter portion 8 is gradually reduced in diameter from the bottom to the top.

  The discharger 5 is formed in a multi-stage cylindrical shape, and is screwed onto the male screw of the small diameter portion 9 and is fixed to the mounting cap 12. The mounting cap 12 is arranged coaxially with the container shaft L. And a discharge pump 13 for discharging the contents F of the inner container 2 to the outside.

  The mounting cap 12 is provided above the lower cylinder part 14 with a lower cylinder part 14 having an internal thread formed on the inner peripheral surface thereof, and guides the vertical movement of the pump head 18 described later along the container axis L direction. A cylindrical portion 15. A flange-like pump mounting portion 16 projects from the inner peripheral surface of the connecting portion between the lower cylindrical portion 14 and the upper cylindrical portion 15 inward in the radial direction, and the discharge pump 13 is connected to the pump mounting portion 16. Is fixed.

  The discharge pump 13 extends from the inside of the upper cylindrical portion 15 of the mounting cap 12 to the inside of the inner container 2, and has a pump main body 17 fixed to the pump mounting portion 16 and a pump head mounted on the upper end portion of the pump main body 17. 18.

  On the outer peripheral surface of the pump body 17, a flange portion 17 a protrudes radially outward, and this flange portion 17 a is the lower surface of the pump mounting portion 16 in the mounting cap 12 and the upper end of the small diameter portion 9 in the cover cap 6. The discharge pump 13 is fixed by being sandwiched in the container axis L direction by the opening edge.

  Inside the pump body 17, an introduction path (not shown) through which the content F filled in the inner container 2 can flow is formed. The introduction path communicates with the inside of the inner container 2 and communicates with a later-described discharge port 21 of the pump head 18. Further, a portion of the pump body 17 positioned below the pump mounting portion 16 is a cylinder portion 20 in which a piston member (not shown) is disposed.

  The pump head 18 is formed with a discharge port 21 through which the contents F introduced into the introduction path are ejected to the outside. The pump head 18 is disposed in an upwardly biased state at the upper end of the pump body 17, and has an outer diameter smaller than the inner diameter of the upper cylinder portion 15 of the mounting cap 12. It is possible to move up and down along L.

  When the pump head 18 is pushed down and the piston member biased upward in the cylinder part 20 descends while sliding in contact with the inner peripheral surface of the cylinder part 20, the discharger 5 moves the contents F in the cylinder part 20. Is compressed and circulated through the introduction passage in the pump body 17, and the content F is discharged from the discharge port 21 of the pump head 18. When the pump head 18 is released from being pushed down, the piston member rises in the cylinder portion 20 while being in sliding contact with the inner peripheral surface of the cylinder portion 20, thereby depressurizing the inside of the cylinder portion 20. The contents F filled in 2 are introduced into the cylinder portion 20.

  In the example shown in the figure, a cap-like cylindrical overcap 22 is fitted to the middle diameter portion 8 of the cover cap 6 so as to cover the discharger 5.

In this embodiment, the inner container 2 includes a cylindrical body portion 23 formed so as to be capable of volume reduction deformation, and is formed thicker than the body portion 23 by compression molding, and the upper end of the body portion 23. And a cylindrical mouth side member 24 fused or welded to the opening (one end opening) 23a. Furthermore, the inner container 2 includes a bottom portion 25 that is fused or welded to the lower end opening 23 b of the body portion 23.
In the inner container 2 of the present embodiment, all of the body portion 23, the mouth portion side member 24, and the bottom portion 25 are formed of, for example, polyethylene terephthalate.

The outer diameter of the body portion 23 is smaller than the inner diameter of the outer container 3. Moreover, the thickness of the trunk | drum 23 is 0.35 mm or less, for example, Preferably it is 0.1 mm-0.2 mm.
The bottom portion 25 is formed in a cylindrical shape by compression molding or injection molding, for example, and the outer diameter thereof is slightly smaller than the inner diameter of the body portion 23. The outer peripheral surface of the upper end portion of the bottom portion 25 is fused or welded to the inner peripheral surface of the lower end portion of the body portion 23. The bottom portion 25 allows the inner container 2 to stand on its own.

The mouth portion side member 24 is formed in a multi-stage cylindrical shape, and the mouth portion 4 and a large diameter portion 26 having a diameter larger than that of the mouth portion 4 and smaller than the inner diameter of the trunk portion 23 are arranged in this order from the top to the bottom. The steps 27 are continuously provided.
A male screw is formed on the outer peripheral surface of the mouth portion 4.
At the lower end of the large-diameter portion 26, a connecting portion 28 that gradually increases in diameter as it goes downward is provided. The inner peripheral surface of the upper end opening 23a of the trunk portion 23 is fused or welded to the outer peripheral surface of the connecting portion 28.

The mouth-side member 24 is integrally formed with a support protrusion 29 that protrudes radially outward and is supported on the upper end opening edge 3a when it is housed in the outer container 3.
Here, in the illustrated example, the support protrusion 29 protrudes in a flange shape from the outer peripheral surface of the large diameter portion 26 and is formed integrally with the large diameter portion 26. The thickness of the support protrusion 29 is slightly larger than the thickness of the large diameter portion 26. The outer peripheral edge of the lower surface of the support protrusion 29 is in contact with the upper end opening edge of the outer container 3, and the outer peripheral edge of the upper surface is in contact with the lower end of the second step 8 a in the cover cap 6. Yes. By supporting the support protrusions 29 in this way, the inner container 2 is disposed coaxially with the container axis L, and the lower end of the bottom portion 25 is not in contact with the bottom surface of the outer container 3 and is placed in the outer container 3. Arranged.

Next, a method for manufacturing the inner container 2 formed as described above will be described.
The manufacturing method of the inner container 2 includes a body part forming step for forming the body part 23, and the mouth side member 24 and the upper end opening 23a of the body part 23 are fused or compressed while the mouth side member 24 is compression molded. And a mouth side member forming step to be welded. Furthermore, in this embodiment, the manufacturing method of the inner container 2 includes a bottom portion forming step in which the lower end opening portion 23b and the bottom portion 25 are fused or welded.

  First, as the body portion forming step, the body portion 23 is formed by cutting the tube body in a predetermined length in the axial direction while continuously extruding the tube body into a long shape.

Next, a mouth side member forming step is performed.
First, a sheet material is formed, and the sheet material is punched to form the disk-shaped body 24a. Thereafter, as shown in FIG. 2, the disk-like body 24 a is fitted into the upper end opening 23 a of the body portion 23 formed in the body portion forming step.
Next, after placing the outer mold having the inner surface shape along the outer surface shape of the mouth side member 24 described above on the disk-like body 24a fitted as described above, the inner surface of the mouth side member 24 is A mandrel having an outer surface shape along the shape is inserted into the body portion 23 from its lower end opening 23b and moved toward the outer mold. And the opening | mouth side member 24 is shape | molded by pinching the disk-shaped body 24a from an up-and-down surface with the inner surface of an outer type | mold, and the outer surface of a mandrel. At this time, the connecting portion 28 of the mouth side member 24 and the upper end opening 23a of the body portion 23 are fused or fused.

Next, as the bottom portion forming step, after forming the bottom portion 25 by an appropriate molding method such as compression molding, the outer peripheral surface of the bottom portion 25 is fused or fused to the inner peripheral surface of the lower end opening 23b of the body portion 23. .
Thus, the inner container 2 described above is formed.

Next, an example of how to use the double container 1 configured as described above will be described.
First, the overcap 22 is removed and the pump head 18 is pushed down to discharge the contents F in the cylinder portion 20 from the discharge port 21 to the outside. Thereafter, when the pump head 18 is released from being pushed down, the content F of the inner container 2 is sucked into the cylinder portion 20. At this time, the inside of the inner container 2 is depressurized, and the body portion 23 of the inner container 2 undergoes volume reduction deformation.

  According to the inner container 2 according to the present embodiment, the body portion 23 is formed by extrusion molding, the mouth side member 24 is compression-molded, and the body portion 23 and the mouth side member 24 become separate members. Therefore, the thickness of the support protrusion 29 can be reduced by a desired amount regardless of the thickness of the body portion 23. Accordingly, it is possible to reduce the amount of material used while suppressing the decrease in rigidity of the support protrusion 29 to such an extent that the inner container 2 becomes unstable with respect to the outer container 3.

Moreover, since the double container 1 of the present embodiment includes the inner container 2, the amount of material used can be reduced while the inner container 2 is stably disposed with respect to the outer container 3.
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 23 of the vessel 2 from being deformed or torn.
Moreover, since the discharge device 5 is provided, the contents F can be easily discharged from the inner container 2.

  Moreover, according to the manufacturing method of the inner container 2 according to the present embodiment, the mouth side member 24 and the body portion 23 are fused while the mouth side member 24 is compression-molded during the mouth side member forming step. Or since it welds, compared with the case where formation of the mouth part side member 24 and adhesion | attachment of the mouth part side member 24 and the trunk | drum 23 are performed separately, it can manufacture efficiently.

[Second Embodiment]
Next, a second embodiment according to the present invention will be described with reference to FIG.
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different points will be described.

The support protrusion 42 of the inner container 41 in the double container 40 according to the present embodiment is directed outward in the radial direction from two locations sandwiching the container axis L in the radial direction on the outer peripheral surface of the large-diameter portion 26 of the inner container 41. A pair of protrusions projecting from each other.
In addition, a pair of support grooves in which the support protrusions 42 are disposed are formed in a portion located on the radially inner side in the upper end opening edge 3 a of the outer container 3. By arranging the support protrusion 42 in the support groove, the inner container 41 is supported by the outer container 3 in a state in which the rotation around the container axis L is prevented.

  The cover cap 44 is formed in a cylindrical shape, is screwed onto a male screw formed in the outer container 3, and is disposed coaxially with the container axis L. The cover cap 44 includes a screwed tube portion 45 having an internal thread formed on the inner peripheral surface, and a cover portion 46 that protrudes in a flange shape radially inward from the upper end of the screwed tube portion 45. .

  Inside the cover portion 46, a connecting portion between the large-diameter portion 26 and the step portion 27 is arranged in the mouth side member 24 of the inner container 41. The inner diameter of the cover portion 46 is equal to the outer diameter of each of the large-diameter portion 26 and the step portion 27, and the upper surface of the step portion 27 of the mouth side member 24 is exposed to the outside and visible. The cover portion 46 is arranged so as to be continuous with the upper surface. Further, the lower surface of the cover portion 46 is in contact with the upper surface of the support protrusion 42.

The bottom 47 of the inner container 41 is formed of a disc-shaped sealing body whose thickness is substantially equal to the thickness of the body 23. The lower end portion of the body portion 23 is bent outward in the radial direction, and the outer peripheral edge portion of the upper surface of the bottom portion 47 is fused or welded to the lower surface thereof.
The mounting cap 12 of the discharger 5 is screwed onto the male screw of the mouth portion 4 of the inner container 41.

According to the inner container 41 and the double container 40 according to the present embodiment, the same operational effects as the inner container 2 and the double container 1 of the first embodiment can be obtained.
Moreover, according to the double container 40, since the discharge device 5 is directly mounted on the inner container 41, the number of parts of the double container 40 can be suppressed.

  Further, since the mouth side member 24 is formed by compression molding, decoration such as color and pattern can be easily applied as compared with the case of forming by extrusion molding or blow molding. When the mouth side member 24 is thus decorated, in this embodiment, the stepped portion 27 of the mouth side member 24 is visible from the outside. Can exert a decorative effect.

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, in the above embodiment, the mouth side member 24 is formed by compression molding, but may be formed by injection molding.

  Moreover, in the said embodiment, although the trunk | drum 23 was formed by extrusion molding as a trunk | drum shaping | molding process, the sheet | seat of planar view rectangular shape was rounded, the both peripheral ends were adhere | attached, and the trunk | drum 23 was formed. May be. That is, if the body part 23 and the mouth side member 24 are formed by different molding methods, and the body part 23 and the mouth side member 24 are made different from each other, the present invention is not limited to the above-described molding method, and can be appropriately changed. May be.

  Moreover, in the said embodiment, although it was set as the double containers 1 and 40 provided with the inner containers 2 and 41, the outer container 3, the discharge device 5, and the cover caps 6 and 44, the inner containers 2 and 41 and the inner containers 2 and 41 are used. A cap with a cap attached to the mouth portion 4 may be used. Even when the contents F in the inner containers 2 and 41 of the double containers 1 and 40 are completely discharged, the inner containers 2 and 41 are filled with the contents F. Can be exchanged for. Further, the contents F may be discharged from the mouth portion 4 without using the discharger 5 in a state where the cap of the container with the cap is removed.

  Moreover, in the said embodiment, although the double containers 1 and 40 are provided with the outer container 3, it is good also as a container with a discharge device which consists of the inner containers 2 and 41 and the discharge device 5. FIG.

Moreover, in the said embodiment, although the shape of the outer container 3 was made into the bottomed cylindrical shape, a cylindrical shape may be sufficient. Furthermore, if the shape of the outer container 3 is cylindrical, it is not limited to a cylindrical shape.
Moreover, in the said embodiment, what has the function to suck up the content F in the inner container 2 was used as the discharger 5, but a simple nozzle etc. may be used.

  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 sectional view of the double container of a 1st embodiment concerning the present invention. It is one process figure which concerns on the manufacturing method of the inner container with which the double container shown in FIG. 1 was equipped. It is a half sectional view of the double container of the second embodiment according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 40 Double container 2, 41 Inner container 3 Outer container 3a Upper edge opening edge of outer container 4 Mouth part 5 Discharger 23 Body part 23a Upper end opening part of trunk | drum (one end opening part of trunk | drum)
24 Mouth side members 29, 42 Support protrusion F Contents

Claims (3)

A bottomed cylindrical inner container that is filled with contents and used inside the outer container,
A cylindrical body formed to be capable of volumetric deformation;
The whole is formed thicker than the barrel by compression molding or injection molding, and has a cylindrical mouth side member fused or welded to one end opening of the barrel,
The mouth-side member is integrally formed with a support protrusion that protrudes radially outward and is supported on an upper end opening edge of the mouth-side member when it is housed in the outer container. And inner container. 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, The double container characterized by the above-mentioned. It is a manufacturing method of the inner container according to claim 1,
A body part forming step for forming the body part;
A mouth-side member forming step of fusing or welding the mouth-side member and one end opening of the body while compressing or injection-molding the mouth-side member;
The manufacturing method of the inner container characterized by comprising.

Images