JP2014234196A - Double container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double container which has a bottom crack part for discharging contents by squeezing a container body, and which can suitably discharge the contents when any position of the container body is squeezed.SOLUTION: An uneven panel part 13 is formed along a circumferential direction of a body 4 centering on a predetermined height position of the body 4 where a phase is displaced by 90° from a body parting line maximizing a tensile force urging the bottom crack part to be opened. Furthermore, the uneven panel part 13 is formed as a depressed area with a peripheral length Land a height L, the longitudinal section of which assumes a triangular wave shape.

Description

  The present invention relates to a double container that includes an outer layer that forms an outer shell of a container, and an inner layer that can be volume-reduced and deformed that is housed inside the outer layer, and that only reduces the volume of the inner layer as the contents are poured out. Is.

As a container for storing cosmetics such as lotion, shampoo, rinse, liquid soap, food seasoning, etc., an outer layer that forms the outer shell of the container, and an inner layer that can be reduced in volume and contained inside the outer layer A double container configured to provide an outer layer with an opening for introducing outside air that communicates with the inner layer and to reduce the volume of the inner layer as the contents are poured out.
(Also known as the “Delami container”). As the opening for introducing the outside air of the double container, for example, in addition to the opening provided in the outer layer part of the container mouth tube part, the bottom formed by the pinch-off part of the split mold on the bottom wall surface of the container bottom part. For example, a bottom crack portion (also referred to as a “slit”) formed by a difference in molding shrinkage between the outer layer and the inner layer in direct blow molding is known in the outer layer portion of the seal portion (for example, a patent). See reference 1.)

Moreover, as a discharge method of the contents, a type using a manual pump attached to the container mouth tube (for example, refer to Patent Document 1), a type for squeezing the container body (for example, refer to Patent Document 1). ) Furthermore, the type that mainly uses the weight of the contents
(See, for example, Patent Document 2). In the type using a manual pump, the structure is complicated and the number of parts is increased, so an increase in cost is inevitable. In the type in which the container body is squeezed, the structure is relatively simplified, but the inner layer In order to reduce the volume only, it is common to provide an outside air introduction valve (check valve) that closes the opening for introducing outside air when the outer layer is pressed and opens the opening when the pressure is released. On the other hand, the type that mainly uses the weight of the contents is excellent in cost reduction because it has a simple structure and does not require a check valve.

JP 2009-7060 A JP 2008-207860 A

By the way, among the double containers that squeeze the container body and discharge the contents, a type that does not have a check valve (a type that discharges contents by using both the weight of the contents and the squeeze of the container body) In this case, the bottom crack portion of the bottom seal portion is required to prevent air between the outer layer and the inner layer from being easily escaped through the bottom crack portion when the container body portion is squeezed.
As shown in FIG. 10, when squeezing the parting line PL of the container body, the deformation of the body related to the squeeze deformation of the body is transmitted to the bottom, and a tensile force is generated at the bottom. And the tensile force acts in the direction which tries to close the bottom crack part of a bottom seal part. As a result, the air between the outer layer and the inner layer is less likely to escape from the bottom crack.
However, when squeezing the barrel position out of phase from the parting line PL of the container barrel, the tensile force generated at the bottom tends to open the bottom crack as well as the direction to close the bottom crack. It also affects the direction. As the phase shift increases from the parting line PL, the tensile force for opening the bottom crack also increases.
In particular, as shown in FIG. 11, when squeezing the container body part that is 90 ° out of phase with the parting line PL of the container body part, the tensile force to open the bottom crack part becomes the largest, and the bottom seal part In this case, distortion deformation that tries to open the bottom crack occurs. As a result, the air between the outer layer and the inner layer escapes through the bottom crack portion of the bottom seal portion, and the user's pressing force cannot be converted into a force that crushes the inner layer, making it difficult to discharge the contents. There was a problem. That is, in the above-mentioned double container having no check valve, there is a problem that it is difficult to suitably discharge the contents when squeezing the position of the body part out of phase from the parting line PL of the container body part. .
Accordingly, the present invention has been made in view of the above-described problems of the prior art, and the problem to be solved by the present invention is to suitably discharge the contents regardless of the position of the container body. The object is to provide a double container that can be used.

A first means according to the present invention for solving the above technical problem is formed on an outer layer forming an outer shell of a container, an inner layer capable of volume-reducing deformation accommodated inside the outer layer, and a bottom portion of the container. A container body having a bottom seal part and a bottom crack part as an outside air introduction part formed between the outer layer and the inner layer formed in the bottom seal part is discharged when the container body part is pressed. A heavy container,
It is characterized by comprising a concavo-convex panel portion having flexibility along the circumferential direction around a predetermined height position of the barrel portion shifted in phase by at least 90 ° with respect to the parting line of the barrel portion.

In the above-described configuration, distortion deformation of the trunk portion caused by squeeze deformation of the trunk portion is suitably absorbed when the uneven panel portion is bent and deformed, and is not transmitted to the bottom portion. Therefore, in order to prevent the deformation between the layers of the bottom seal portion and to prevent the air between the layers from escaping, it is preferable that the concavo-convex panel portion has a phase of at least 90 ° with respect to the parting line of the body portion. It is provided along the circumferential direction of the trunk portion with a predetermined height position shifted from the center. Thereby, even when squeezing the position of the body part whose phase is shifted with respect to the parting line, the distortion of the body part caused by the squeeze deformation of the body part is suitably absorbed by the concavo-convex panel part. Therefore, it is not transmitted to the bottom part, and distortion deformation that attempts to open the bottom crack part of the bottom seal part is suitably suppressed, so that the air between layers does not easily escape through the bottom crack part.
As a result, the squeeze pressing force can be converted into a force that crushes the inner layer, and the contents can be suitably discharged, regardless of the position of the container body. .

  The second means according to the present invention is that at least two of the uneven panel portions are provided at positions facing each other with respect to the parting line.

  In the above configuration, since the concavo-convex panel portion is not provided on the parting line of the trunk portion, an attempt is made to open the bottom crack portion in the distortion deformation of the trunk portion caused by the squeeze deformation of the trunk portion. While the distortion deformation to be absorbed is preferably absorbed, the distortion deformation to close the bottom crack portion acts not to be particularly restricted. As a result, the air between the outer layer and the inner layer is less likely to escape from the bottom crack.

  The 3rd means which concerns on this invention exists in the said uneven | corrugated panel part being provided under the said trunk | drum.

  In the above configuration, the uneven panel portion can suitably absorb only the strain deformation that attempts to open the bottom crack portion among the strain deformation of the body portion caused by the squeeze deformation of the body portion. Become.

  The 4th means which concerns on this invention exists in the said uneven | corrugated panel part consisting of a wavy depression structure.

  In the above configuration, since the uneven panel portion can be flexibly deformed, the uneven panel portion should open the bottom crack portion in the strain deformation of the trunk portion caused by the squeeze deformation of the trunk portion. It is possible to suitably absorb only the distortion deformation.

  The fifth means according to the present invention is that the uneven panel portion is formed of a polygonal pyramidal depression structure.

  In the above configuration, since the uneven panel portion can be flexibly deformed, the uneven panel portion should open the bottom crack portion in the strain deformation of the trunk portion caused by the squeeze deformation of the trunk portion. It is possible to suitably absorb only the distortion deformation.

  According to the double container of the present invention, by the concavo-convex panel portion provided along the circumferential direction around the predetermined height position of the container trunk portion shifted by at least 90 ° phase with respect to the parting line of the container trunk portion, Among the distortion deformation of the trunk portion caused by the squeeze deformation of the trunk portion, the distortion deformation that attempts to open the bottom crack portion is suitably absorbed and is not transmitted to the bottom portion. As a result, even when squeezing the position of the body part out of phase with respect to the container body parting line, distortion deformation that attempts to open the bottom crack part of the bottom seal part is suitably suppressed, and the air between the layers Becomes difficult to escape through the bottom crack. Thereby, even if it is a case where any position of a container trunk | drum is squeezed, the pressing force which concerns on a squeeze can be converted into the force which crushes an inner layer, and it becomes possible to discharge the contents suitably. .

It is a front view which shows the double container of this invention. It is a bottom view which shows the double container of this invention. It is a right view which shows the double container of this invention. It is explanatory drawing which shows a hinge cap. It is explanatory drawing which shows the uneven | corrugated panel part which concerns on this invention. It is explanatory drawing which shows operation | movement of the uneven | corrugated panel part which concerns on this invention. It is a front view which shows the other example of the double container of this invention. It is a right view which shows the other example of the double container of this invention. It is explanatory drawing which shows the other example of the uneven | corrugated panel part which concerns on this invention. It is explanatory drawing which shows the conventional double container. It is explanatory drawing which shows the conventional double container.

  Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings.

1-3 is explanatory drawing which shows the double container 1 of this invention. 1 is a front view, FIG. 2 is a bottom view, and FIG. 3 is a right side view.
This double container 1 is composed of an outer layer 11 formed as an outer shell body having a self-shape holding ability required for a synthetic resin material such as polyethylene and polypropylene, and nylon having low compatibility with the outer layer 11. , Blow molding a multi-layer parison made by multilayer extrusion molding with an inner layer 12 formed into a bag-like shape that can be deformed and reduced with a synthetic resin material such as ethylene vinyl alcohol copolymer and polyethylene terephthalate. It is a blow molded container obtained by doing.

  This double container 1 is a housing having a mouth tube part 2, a shoulder part 3, a cylindrical body part 4, and a bottom part 5 in which a bottom wall is formed in a depressed shape at the center part. Further, a hinge cap 20 is attached to the mouth tube portion 2. The hinge cap 20 will be described later with reference to FIG.

  As shown in FIG. 2 (a), the bottom wall 5a formed in the recessed shape of the bottom portion 5 is formed into a ridge shape by crushing the parison by the pinch-off portion of the blow split mold along the parting line PL. A molded bottom seal portion 6 is formed. 2B is a cross-sectional view taken along the line AA in FIG. 2A. For example, when a pressing force from the lateral direction (arrow direction) is applied to the bottom seal portion 6, FIG. As shown, the outer layer 11 and the inner layer 12 are partially peeled, and a bottom crack 7 serving as an outside air introducing portion is formed between the outer layer 11 and the inner layer 12.

  Although illustration is omitted, in order to avoid partial blockage of the filling space M as much as possible, between the outer layer 11 and the inner layer 12, it extends in the vertical direction from the bottom wall 5a toward the mouth tube portion 2, At least one adhesive band that partially bonds the outer layer 11 and the inner layer 12 may be provided.

Although details will be described later with reference to FIGS. 5-6, an uneven panel portion 13 is formed below the trunk portion 4. Uneven panel unit 13, a position shifted 90 ° phase from the parting line PL, i.e., a cutting plane through the bottom wall center C _t perpendicular to the parting line PL of the bottom wall 5a (Fig. 2), the body portion 4 of a predetermined height position h on the intersection line CL outer surface intersect when the surface center C _s, from the surface center C _s, a predetermined circumferential length L _w in the circumferential _direction, and a predetermined height It is formed as a recessed region of the body portion 4 of the length L _h along the direction. Moreover, as shown in FIG. 3, the uneven | corrugated panel part 13 is each formed in the trunk | drum 4 symmetrically about the parting line PL.

  When the body portion 4 is squeezed, the concavo-convex panel portion 13 absorbs distortion deformation that attempts to open the bottom crack in the strain deformation of the body portion 4 caused by the squeeze deformation of the body portion 4. Thus, this is a deformation absorbing panel for preventing distortion deformation of the body part 4 from being transmitted to the bottom part 5. Thereby, when the position of the trunk | drum 4 which shifted 90 degrees phase about the parting line PL is squeezed, the distortion deformation which tries to open the bottom crack part 7 of the bottom seal part 6 is suppressed suitably, and the outer layer 11 and the inner layer It becomes difficult for air between the 12 layers to escape through the bottom crack 7.

FIG. 4 is a cross-sectional explanatory view showing the hinge cap 20.
The hinge cap 20 includes an inner plug 30 that regulates the flow of contents, a pouring plug 40 that serves as a discharge port for the contents, and a lid 50 that seals the pouring plug 40.

  The inner plug 30 includes a cylindrical wall 31 standing at the center thereof, and an annular wall 32 that surrounds the cylindrical wall 31 and is connected to the lower portion of the cylindrical wall 31 via a flange. A flange 33 is provided at the upper edge of the annular wall 32 so as to extend outward in the radial direction and come into contact with the upper end of the mouthpiece 2. Further, an inclined wall 34 that decreases in diameter downward is provided at the lower portion of the cylindrical wall 31. A plurality of vertical ribs 35 provided at intervals in the circumferential direction are provided on the inner peripheral surface of the cylindrical wall 31.

  A spherical body 36 is provided inside the longitudinal rib 35 in the radial direction. Here, the spherical body 36 moves under its own weight along the vertical rib 35. When the double container 1 is in the standing posture as shown in FIG. The filling space M in the inner layer 12 is sealed by contacting over the entire circumference. Note that the upper ends of the vertical ribs 35 are slightly inclined toward the inner side in the radial direction, and the interval is smaller than the outer diameter of the spherical body, thereby forming a retaining body for the spherical body 36.

  The pouring stopper 40 includes a pouring cylinder 41 that communicates with the cylindrical wall 31, and the pouring cylinder 41 extends toward the outside in the radial direction and is connected to a ceiling wall 42 that is positioned on the flange portion 33. On the other hand, the top wall 42 is connected to the outer peripheral wall 43 surrounding the mouth tube portion 2 of the double container 1 at the outer edge portion. On the inner peripheral surface of the outer peripheral wall 43, a female screw portion 43a that is screwed into the male screw portion 2a of the mouth tube portion 2 is provided. Thereby, the pouring stopper 40 is screwed to the mouth tube portion 2 in a state where the inner plug 30 is sandwiched between the mouth tube portion 2.

The lid 50 connects the peripheral wall 52 to the edge of the top wall 51 that covers the top of the pouring stopper 40, and connects the peripheral wall 52 and the outer peripheral wall 43 of the pouring stopper 40 by a hinge 53. In addition, without providing the hinge 53, you may make it the undercut fitting or screwing of the cover body 50 and the extraction plug 40 detachably. On the lower surface of the top wall 51, a seal cylinder 54 that comes into liquid-tight contact with the dispensing cylinder 41 is provided. A pin 55 extending downward from the back surface of the top wall 51 is provided on the radially inner side of the seal cylinder 54. The pin 55 is provided so as to come into contact with the spherical body 36 before reaching the upper limit when the spherical body 36 is displaced upward. Thereby, even if the spherical body 36 moves upwards vigorously by transportation or the like,
It will not come off beyond the retaining provided at the upper end of the vertical rib 35.

  The radius on the hinge 53 side of the dispensing cylinder 41 is set longer than the radius on the opposite side, and the frontage is relatively wide. This is to prevent the pin 55 from interfering with the inner peripheral surface of the dispensing cylinder 41 when the lid 50 is opened and closed with the hinge 53 as a fulcrum.

5-6 is explanatory drawing which shows the uneven | corrugated panel part 13 which concerns on this invention. 5A is a developed plan view, FIG. 5B is a sectional view taken along the line BB in FIG. 5A, and FIG. 6 is an explanatory view showing the operation of the uneven panel portion 13.
As shown in FIG. 5A, the concavo-convex panel portion 13 is a concavo-convex panel having a triangular cross section in the longitudinal section, and has flexibility particularly in the Y direction (height direction) and the Z direction (radial direction). doing. Accordingly, when the body 4 is squeezed, the concavo-convex panel 13 is deformed by bending in the Y direction, the Z direction, or both the Y direction and the Z direction, as shown in FIG. Of the strain deformation occurring in the portion 4, the strain deformation that attempts to open the bottom crack portion is suitably absorbed so that it is not transmitted to the bottom portion 5. As described above, the concavo-convex panel portion 13 is opposed to the trunk portion 4 in a form facing the depression portion at a position shifted by 90 ° from the trunk parting line PL at which the tensile force for opening the bottom crack portion is maximum. Each is formed. Therefore, even when squeezing any position of the body part 4 shifted in phase from the body parting line PL, distortion deformation to open the bottom crack part 7 of the bottom seal part 6 is suitably suppressed, Air between the outer layer 11 and the inner layer 12 is less likely to escape from the bottom crack 7. Thereby, regardless of the squeeze position of the body part 4, the user's pressing force is suitably converted into a force for crushing the inner bag of the inner layer 12, and the contents can be discharged smoothly.

  In addition, in this embodiment, although the vertical cross-sectional shape of the uneven | corrugated panel part 13 is triangular wave shape, it is not restricted to triangular wave shape, A sine wave shape may be sufficient. Alternatively, it may be a simple circumferential groove shape.

7-8 is explanatory drawing which shows the other example of the double container of this invention. 7 is a front view, and FIG. 8 is a right side view.
This double container 1A is the same as the double container 1 with respect to the configuration excluding the uneven panel portion 13A.

Although the details of the uneven panel portion 13A will be described later with reference to FIG. 9, the body portion 4 is continuously deformed into a quadrangular pyramid shape along its outer peripheral surface, and is caused by squeeze deformation. This is a structure that can suitably absorb distortion deformation in all directions of the body portion 4.
Therefore, when squeezing the position of the body 4 that is out of phase with respect to the parting PL, the distortion deformation that attempts to open the bottom crack in the distortion deformation of the body 4 caused by the squeeze deformation is the uneven panel. When the portion 13 is bent and deformed, it is suitably absorbed and is not transmitted to the bottom portion 5. As a result, distortion deformation that attempts to open the bottom crack portion 7 of the bottom seal portion 6 is preferably suppressed, and air between the outer layer 11 and the inner layer 12 is less likely to escape through the bottom crack portion 7. This makes it possible to convert the user's pressing force into a force that crushes the inner bag (inner layer 12), regardless of the position of the body portion 4, and the contents are discharged smoothly. Become so.

FIG. 9 is an explanatory diagram showing the uneven panel portion 13A. FIG. 9A is a developed plan view, and FIG. 9B is a cross-sectional view taken along the line CC in FIG.
The concave-convex panel portion 13 </ _b > A has five continuous pyramidal portions 4 along the outer peripheral surface (a quadrangular pyramid shape with the surfaces S ₁ , S ₂ , S ₃ , S ₄ as side surfaces and the point P ₁ as a vertex). The structure is depressed. In particular, it has flexibility in all directions including the X direction (circumferential direction), the Y direction (height direction), and the Z direction (radial direction). Therefore, when squeezing the trunk 4, the concavo-convex panel 13 </ b> A bends and deforms in all directions, and tries to open the bottom crack in the strain deformation generated in the trunk 4 due to the squeeze deformation. The distortion deformation is preferably absorbed and not transmitted to the bottom 5.

  The depressed shape is not limited to a quadrangular pyramid shape, and may be a polygonal pyramid shape.

Further, in this embodiment, uneven panel unit 13,13A, the terms center C _s, a predetermined circumferential length along the circumferential direction L _w, and barrel length L _h along a predetermined height direction However, the present invention is not limited to this, and may be formed over the entire circumference of the body 4 in the circumferential direction.

  Moreover, you may provide the rib-shaped reinforcement rib extended along the parting line PL in the both ends of the bottom seal | sticker part 6 (bottom crack part 7). When forming the bottom seal portion 6 by cutting away the central area of the bottom of the parison with a blow mold, the reinforcing ribs are sandwiched between the outer sides of the central area of the bottom of the parison with the split mold at the same time. And the inner layer 12 are crushed flat. In this case, since the inner layer 12 portion of the bottom portion 5 is held by the reinforcing rib, even if the discharge of the contents proceeds, the inner layer 12 portion of the bottom portion moves to the mouth tube portion 2 side and the filling space M in the inner layer 12 A part is not blocked. Further, the reinforcing rib may be provided with a biting portion in which one side surface is bitten toward the other side surface.

  As described above, according to the double container 1, 1 </ b> A of the present invention, the container body 4 whose phase is shifted by 90 ° with respect to the parting line PL of the body that maximizes the tensile force for opening the bottom crack 7. Of the strain deformation of the body portion 4 caused by the squeeze deformation of the body portion 4 by the uneven panel portions 13 and 13A provided along the circumferential direction around the predetermined height position, the bottom crack portion The distortion deformation that attempts to open is preferably absorbed and is not transmitted to the bottom 5. As a result, even when squeezing the position of the body part 4 shifted in phase from the body parting line PL, distortion deformation to open the bottom crack part 7 of the bottom seal part 6 is suitably suppressed, It becomes difficult for air between layers to escape from the bottom crack portion 7. Thereby, even if it is a case where any position of the container trunk | drum 4 is squeezed, it can convert the pressing force which concerns on a squeeze into the force which crushes an inner layer, and can discharge a content suitably. Become.

  The double container of the present invention can be suitably applied as a dispensing container for storing cosmetics, liquid soap, food seasonings or the like.

DESCRIPTION OF SYMBOLS 1,1A Double container 2 Mouth part 2a Male thread part 3 Shoulder part 4 Body part 5 Bottom part 5a Bottom wall 6 Bottom seal part 7 Bottom crack part 11 Outer layer 12 Inner layer 13, 13A Uneven panel part 20 Hinge cap 30 Middle plug 31 Cylinder wall
32 Annular wall 33 Flange 34 Inclined wall
35 vertical ribs
36 Spherical
40 Pouring tap
41 Pipe
42 Top wall 43 Outer wall
43a Female thread part 50 Lid
51 Top wall
52 peripheral wall 53 hinge 54 seal cylinder 55 pin M filling space

Claims (5)

An outer layer (11) that forms the outer shell of the container, a volume-reducing and deformable inner layer (12) that is housed inside the outer layer (11), and a bottom seal portion (6) formed on the bottom (5) of the container And a bottom crack portion (7) as an outside air introduction portion formed between the outer layer (11) and the inner layer (12) formed in the bottom seal portion (6), and a container body portion (4) It is a double container that discharges contents when pressed,
A concavo-convex panel portion (13) having flexibility along a circumferential direction around a predetermined height position of the barrel portion (4) shifted in phase by at least 90 ° with respect to the parting line (PL) of the barrel portion (4). , 13A).   The double container according to claim 1, wherein at least two uneven panel portions (13, 13A) are provided at positions facing each other with respect to the parting line (PL).   The double container according to claim 1 or 2, wherein the uneven panel portion (13, 13A) is provided below the trunk portion (4).   The double container according to any one of claims 1 to 3, wherein the concavo-convex panel portion (13, 13A) comprises a wave-like depressed structure. The double container according to any one of claims 1 to 3, wherein the concavo-convex panel portion (13, 13A) is formed of a polygonal pyramidal depression structure.

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