JP6614940B2 - Double container - Google Patents

Description

  The present invention relates to a double container in which a volume-deformable inner layer body that accommodates contents is accommodated inside an outer layer body, and the inner layer body undergoes volumetric deformation as the contents are poured out.

  For example, as a container for storing food seasonings, cosmetics such as lotion, shampoo, rinse or liquid soap, a volume-reducible inner layer body for storing contents, and an outer layer body for storing the inner layer body, There is known a double container provided with (for example, see Patent Documents 1 and 2).

  This type of container allows the introduction of outside air between the inner layer body and the outer layer body through the outside air introduction hole penetrating the outer layer body when the contents are poured out, and the contents formed inside the inner layer body Since the structure has a structure in which outside air does not enter the filling space of the object, it has a feature that the contact with the outside air of the contents stored in the container can be reduced to suppress deterioration and alteration.

JP2015-48115A JP2015-91719A

  By the way, in such a double container, for example, when the ambient temperature around the double container rises by taking out after cooling in a refrigerator, the temperature of the air held between the inner layer body and the outer layer body is The air may rise and the air may expand. Normally, when the air between the inner layer body and the outer layer body expands in this way, the expanded air flows out through the outside air introduction hole provided at the bottom of the outer layer body, so the inner layer body and the outer layer body The internal pressure of the space between is kept constant.

  However, for example, dew condensation occurs on the outer surface of the inner layer body due to an increase in the ambient temperature, and the inner layer body partially adheres to the outer layer body due to the dew condensation and blocks the air passage toward the outside air introduction hole. Sometimes. In such a case, the air between the inner layer body and the outer layer body expanded as described above cannot flow out to the outside, the internal pressure of the space between the inner layer body and the outer layer body is increased, and the inner layer body is pressurized. It becomes a state. And if the lid part of the double container is opened in a state where the inner layer body is pressurized, there is a possibility that the contents may be ejected from the spout.

  An object of the present invention is to solve such problems. The purpose of the present invention is to provide contents from a spout due to an increase in ambient temperature in a double container having an outside air introduction hole at the bottom. It is in the place to prevent the eruption of the water

The present invention has been made to solve the above problems, and the double container of the present invention has a bottle shape having a mouth portion, a trunk portion and a bottom portion, and penetrates the bottom portion inward and outward in the bottom portion. An outer layer body provided with an outside air introduction hole, a content filling space, a volume-reducing and deformable inner layer body housed inside the outer layer body, and mounted in the mouth portion and housed in the filling space In a double container comprising: a spout provided with a spout for pouring out the contents formed; and a lid for closing the spout so as to be opened and closed;
A vertical rib-shaped outer layer rib is provided in the body portion of the outer layer body.

  In the double container of the present invention, it is preferable that the outer layer rib is provided in a lower region of the trunk portion.

  Moreover, in the double container of this invention, it is preferable that the said outer layer rib is extended linearly in parallel with the center axis line of the said trunk | drum.

  Moreover, in the double container of this invention, it is preferable that the said outer layer rib is provided in the position away from the parting line formed in the said trunk | drum in the circumferential direction.

  Further, in the double container of the present invention, the bottom portion includes a flat ground surface extending in the circumferential direction so as to surround the outside air introduction hole, and a concave bottom raising portion for intermittently contacting the ground surface in the circumferential direction. It is preferable to have.

  Moreover, in the double container of this invention, it is preferable that the said raising part is provided in two places on the parting line of the said outer-layer body.

  Moreover, in the double container of this invention, it is preferable that the said raising part is provided in two places on the virtual line orthogonal to the parting line of the said outer-layer body.

  Moreover, in the double container of this invention, it is preferable to provide a bottom rib in the said raising part.

  According to the present invention, in a double container having an outside air introduction hole at the bottom, it is possible to prevent the contents from being ejected from the spout due to an increase in the ambient temperature.

It is a front view which shows the double container which concerns on one Embodiment of this invention in a partial cross section. It is a bottom view of the double container of FIG. It is a side view which shows the double container of FIG. 1 in a cross section. It is a side view which shows the double container as a comparative example in a cross section. (A) is a front view shown with a part of double container concerning other embodiments of the present invention, and (b) is a bottom view of the double container of Drawing 5 (a). It is a side view which shows the double container of FIG. 5 in a cross section. It is a bottom view of the double container which concerns on other embodiment of this invention.

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

  As shown in FIGS. 1 and 3, a double container 1 according to an embodiment of the present invention includes an outer layer body 2 constituting an outer shell, and a volume-reducible inner layer body housed inside the outer layer body 2. 3 and a pouring cap 5 attached to the mouth 4 of the outer layer body 2.

  The outer layer body 2 has a bottle shape having a mouth portion 4 formed in a cylindrical shape having a circular cross section, a body portion 6 having a circular cross section integrally connected to the mouth portion 4, and a bottom portion 7 integrally connected to the body portion 6. There is no. A male screw portion 4 a is provided on the outer peripheral surface of the mouth portion 4, so that the dispensing cap 5 can be screwed. In addition, the cross-sectional shape of the trunk | drum 6 is not limited to circular, For example, it can also be made into a polygon, an ellipse, etc.

  The body portion 6 is provided with vertical rib-shaped outer layer ribs 8 protruding toward the inside of the container. In the present embodiment, a total of eight outer layer ribs 8 are provided in the region below the body portion 6 at intervals in the circumferential direction, and each outer layer rib 8 is parallel to the central axis C of the body portion 6. It extends in a straight line. Further, four outer layer ribs 8 are provided symmetrically in the front-rear direction by four each on the front side and the back side of the double container 1.

  In addition, if the outer layer rib 8 is a longitudinal rib shape, the shape, position, and number are not limited to the illustrated example. For example, what protrudes toward the outer side of a container may be sufficient, and it can also be set as the shape which has the part which each outer-layer rib 8 curves or bends. A plurality of outer layer ribs 8 having different shapes may be provided. Moreover, the outer layer rib 8 does not need to be completely parallel to the central axis C, and may be inclined. Furthermore, in addition to the outer layer rib 8, for example, irregularities that are not in the form of vertical ribs such as a hemisphere may be provided in the body portion 6.

  As shown in FIG. 2, a linear pinch-off portion 9 is formed at the center of the bottom portion 7 by cutting with a blow mold. In the present embodiment, the pinch-off part 9 has a linear shape extending in the radial direction of the bottom part 7, and the pinch-off part 9 is provided on the parting line P of the bottom part 7. The pinch-off portion 9 is provided with reinforcing ribs 10 and slit-like outside air introduction holes 11. The reinforcing rib 10 is formed by sandwiching the outer layer body 2 and the inner layer body 3 with a split mold and crushing them flatly. The reinforcing rib 10 increases the bottom crack strength of the crimping surface of the pinch-off portion 9. It is increasing. Further, since the inner layer body 3 is sandwiched between the outer layer bodies 2 and hardly peels off at the portion where the reinforcing ribs 10 are provided, the direction of the deformation of the inner layer body 3 due to the discharge of the contents can be changed by appropriately providing the reinforcing ribs 10. It is possible to regulate and prevent discharge failure. The reinforcing rib 10 may be provided only on one end side of the outside air introduction hole 11 as shown in the drawing, may be provided on both sides, or may be configured without the reinforcing rib 10.

  The outside air introduction hole 11 penetrating the outer layer body 2 in the inner and outer direction is formed in a pinch-off portion 9 by, for example, pressing the outer layer 2 and splitting the outer layer body 2 to separate the inner layer body 3 from the outer layer body 2. It is a hole. If the length of the outside air introduction hole 11 is too short, the opening length of the outside air introduction hole 11 is insufficient and the outside air cannot be sufficiently introduced. On the other hand, if the length of the outside air introduction hole 11 is too long, the outside air The introduction hole 11 is easy to open, and even if the outer layer body is squeezed, air leaks and the inner layer body cannot be sufficiently reduced in volume, making it difficult to discharge the contents. For this reason, it is desirable to set the length of the outside air introduction hole 11 to an appropriate length in accordance with the rigidity of the outer layer body 10 in order to satisfy both of these contradictory functions.

  With the volume reduction deformation of the inner layer body 3, air can be introduced between the inner layer body 3 and the outer layer body 2 through the outer air introduction hole 11, and the air between the inner layer body 3 and the outer layer body 2 expands. In this case, air can be discharged to the outside through the outside air introduction hole 11. As long as the outside air introduction hole 11 penetrates the bottom 7 of the outer layer body 2, the position, shape, number, and the like are not particularly limited, and may be provided at a position away from the pinch-off portion 9.

  The bottom 7 is provided with a flat grounding surface 12 that abuts on a support surface such as the top surface of the table when the double container 1 is placed upright so as to surround the outside air introduction hole 11. Yes. The ground surface 12 has a shape that extends in the circumferential direction of the bottom portion 7 and is partially intermittent, and a concave bottom raising portion 13 is provided in the intermittent portion. In the present embodiment, the bottom raising portions 13 are provided at two locations on the extension line of the outside air introduction hole 11, that is, on the parting line P of the bottom portion 7.

  In the present embodiment, concave inner bottom raised portions 14 are provided on both sides of the outside air introduction hole 11 on the radially inner side (center axis C side) than the ground plane 12. Each of the inner bottom raised portions 14 is provided with two bottom ribs 14a projecting toward the inside of the container on an extension line of the outside air introduction hole 11, that is, a virtual line orthogonal to the parting line P. Since the bottom rib 14a suppresses the close contact between the outer layer body 2 and the inner layer body 3 in the region of the bottom portion 7, it becomes easier to secure an air flow path. In addition, the shape of the bottom rib 14a is not specifically limited, It can be set as arbitrary uneven | corrugated shape.

  In addition, between the outer layer body 2 and the inner layer body 3, a belt-like adhesive layer formed of a synthetic resin having adhesiveness to the outer layer body 2 and the inner layer body 3, that is, an adhesive band (not shown) is provided. It has been. The adhesive band is disposed between the outer layer body 2 and the inner layer body 3, and joins the outer layer body 2 and the inner layer body 3 to each other. Note that one adhesive band or two or more adhesive bands may be provided, or a structure without an adhesive band may be employed. In the present embodiment, a single adhesive band is provided along the parting line P over the body portion 6 and the bottom portion 7.

  The inner layer body 3 has a filling space M for accommodating contents inside thereof, and can be reduced in volume by being peeled off from the laminated outer layer body 2. Here, since the inner layer body 3 is joined and held from the body portion 6 to the bottom portion 7 of the outer layer body 2 by the adhesive band, the inner surfaces of the inner layer body 3 are partially in contact with each other even when the discharge of the contents proceeds. Thus, a part of the filling space M is not blocked. As described above, the adhesive band is not necessarily provided.

  The double container 1 of the present embodiment is a delamination container (delami container) that can be formed by the following method, for example. That is, first, a synthetic resin for the outer layer having low compatibility and a synthetic resin for the inner layer are coextruded to form a laminated parison, and this laminated parison is blow-molded using a mold, so that the outer layer body 2 The inner layer body 3 is formed in a laminated structure in which the inner layer body 3 is peelably adhered to the inner surface. After blow molding, the inner layer body 3 is once shrunk by suction or the like to peel the entire body from the outer layer body 2, and then air is fed into the inner layer body 3 (filling space M), etc. In this case, the shape of the inner layer body 3 is difficult to be completely restored in the region where the outer layer ribs 8 are provided, and the adhesion to the outer layer body 2 is suppressed, so the region where the outer layer ribs 8 are provided. In this case, an air flow path is secured between the outer layer body 2 and the inner layer body 3.

  Thus, after blow molding, the inner layer body 3 is once shrunk by suction or the like, and the whole is peeled off from the outer layer body 2, whereby a gap can be formed in advance around the outer layer rib 8. The inner layer body 3 is easily peeled off from the outer layer body 2 when the object is poured out.

  After the inner layer body 3 is peeled off, in this example, for example, liquid contents such as food seasonings and cosmetics such as lotion are accommodated in the filling space M of the inner layer body 3 and the dispensing cap 5 Is installed.

  The pouring cap 5 includes an inner plug 15, an pouring plug 16, and a lid body 17. As shown in FIG. 1, the inner plug 15 includes an annular wall 19 that surrounds a cylindrical wall 18 standing at the center thereof and is connected to a lower portion of the cylindrical wall 18 via a flange. Further, a flange portion 20 is provided at the upper end edge portion of the annular wall 19 so as to extend outward in the radial direction and come into contact with the upper end of the mouth portion 4. In the lower part of the cylindrical wall 18, an inclined wall 21 whose diameter is reduced downward is provided. A plurality of vertical ribs 22 provided at intervals in the circumferential direction are provided on the inner peripheral surface of the cylindrical wall 18.

  Further, a spherical body 23 is arranged on the inner side in the radial direction of the vertical rib 22. Here, the spherical body 23 moves by its own weight along the vertical ribs 22, and when the double container 1 is in the standing posture as shown in FIGS. The filling space M of the inner layer body 3 is closed by abutting over it. Note that the upper ends of the vertical ribs 22 slightly bulge inward in the radial direction, and form a stopper for the spherical body 23.

  The spout 16 includes a spout cylinder 24 that communicates with the cylindrical wall 18, and the tip of the spout cylinder 24 serves as a spout. The extraction tube 24 extends outward in the radial direction and is connected to a top wall 25 located on the flange portion 20. Further, an outer peripheral wall 26 surrounding the mouth 4 is connected to the edge of the top wall 25. A female screw portion 26 a corresponding to the male screw portion 4 a of the mouth portion 4 is provided on the inner peripheral surface of the outer peripheral wall 26. As a result, the spout 16 is screwed to the mouth 4 with the inner plug 15 in between. Note that the spout 16 may be configured to engage with the mouth portion 4 undercut.

  The lid 17 closes (seals) the spout at the tip of the spout cylinder 24 so that it can be opened and closed. The lid 17 connects the peripheral wall 28 to the edge of the top wall 27 that covers the top of the spout 16 and is connected by a hinge 29 provided between the peripheral wall 28 and the outer peripheral wall 26 of the spout 16. Is. In addition, you may make it screw out the pouring stopper 16 and the cover body 17 without providing the hinge 29. FIG. On the lower surface of the top wall 27, there is provided a seal cylinder 30 that comes into liquid-tight contact with the dispensing cylinder 24. Further, a pin 31 extending downward is provided on the radially inner side of the seal cylinder 30. The pin 31 has a function of reliably dropping the spherical body 23 toward the inclined wall 21 and closing the filling space M when the lid body 17 is closed.

  In order to pour the contents from the double container 1 equipped with the pour cap 5 configured as described above, the lid 17 is opened to place the double container 1 in an inclined or inverted posture, thereby forming a spherical body. 23 is displaced toward the pouring cylinder 24, and the contents accommodated in the filling space M pass through between the vertical ribs 22 from the opening of the inclined wall 21 by its own weight and are discharged from the pouring cylinder 24. At this time, since outside air is introduced between the outer layer body 2 and the inner layer body 3 through the outside air introduction hole 11 of the pinch-off portion 9, only the inner layer body 3 is reduced in volume while maintaining the shape of the outer layer body 2. To do.

  If the remaining amount of the content is reduced and the remaining amount is reduced, the weight of the entire content is reduced. Therefore, it may be difficult to dispense the content simply by tilting the double container 1. In this case, the inner layer body 3 can be pressed through the air between the outer layer body 2 and the inner layer body 3 if the body portion 6 of the outer layer body 2 is pressed slightly stronger. Can be discharged. When the outer layer body 2 is pressed, a part of the air between the outer layer body 2 and the inner layer body 3 may leak out from the outside air introduction hole 11, but the extension length or bottom of the outside air introduction hole 11 By appropriately adjusting the thickness of 7, the leakage of air from the outside air introduction hole 11 can be reduced as much as possible.

  Here, as shown in FIG. 4 as a comparative example, when the outer layer rib 8 is not provided in the body portion 6, for example, it is generated on the outer surface of the inner layer body 3 as in the double container 100 shown in FIG. 4. Due to the condensation, the inner layer body 3 may be in close contact with the lower region of the body portion 6 of the outer layer body 2 to block the air flow path. In this state, when the air between the outer layer body 2 and the inner layer body 3 expands, the inner layer body 3 is pressurized, and at the same time as the lid 17 is opened, the contents are discharged from the spout at the tip of the pouring cylinder 24. There is a risk of erupting.

  On the other hand, according to the double container 1 of the present embodiment, the outer rib 8 suppresses the close contact between the inner layer body 3 and the outer layer body 2 even when dew condensation occurs on the outer surface of the inner layer body 3 due to an increase in ambient temperature. Therefore, the air flow path to the outside air introduction hole 11 can be secured. Thereby, since the expanded air between the inner layer body 3 and the outer layer body 2 flows out from the outside air introduction hole 11, the inner layer body 3 is not pressurized and the contents are ejected at the same time as the lid body 17 is opened. The phenomenon can be prevented.

Further, since the outer layer ribs 8 are formed in the form of vertical ribs extending in parallel to the central axis C, water droplets generated by condensation are likely to flow toward the bottom part 7, so that moisture hardly stays in the body part 6. The adhesion suppressing effect between the body 3 and the outer layer body 2 can be enhanced. Moreover, when the outer layer rib 8 is in the form of a vertical rib extending in parallel to the central axis C, deterioration of the appearance can be suppressed even when decorating with, for example, a shrink film.
The outer layer rib 8 is preferably provided at least in a region below the trunk portion 6. By setting it as such a structure, since the air of the inner layer body 3 and the outer layer body 2 in the area | region above the trunk | drum 6 becomes easy to flow out from the external air introduction hole 11, the effect which prevents the pressurization to the inner layer body 3 is prevented. Can be increased.

  Further, in the double container 1 of the present embodiment, by providing the bottom raising portion 13, the air that expands between the inner layer body 3 and the outer layer body 2 and flows out of the outside air introduction hole 11 is caused by the bottom raising portion 13. It is surely discharged to the outside through a gap between the formed support surface. Therefore, for example, even when the double container 1 is placed on a support surface containing moisture and a water film is formed between the ground surface 12 and the support surface, the air between the inner layer body 3 and the outer layer body 2 It is possible to prevent the inner layer body 3 from being pressurized by the expansion.

  The outer layer rib 8 is provided at a position away from a parting line (not shown) formed in the body portion 6 of the outer layer body 2 formed along the joint of the mold when the double container 1 is blow molded. It is preferable that On the parting line, an adhesive layer is provided between the outer layer body 2 and the inner layer body 3, or a reinforcing rib 10 is provided on the bottom 7, so that the inner layer body 3 is difficult to peel from the outer layer body 2. Since there is a case of a structure, by arranging the outer layer rib 8 at a position away from the parting line P, the effect of preventing the inner layer body 3 from sticking to the outer layer body 2 is easily obtained.

  Hereinafter, another embodiment of the present invention will be described. In the double container 40 shown in FIGS. 5A, 5 </ b> B, and 6, the bottom portion 7 is provided with bottom raised portions 13 at two locations on a virtual line orthogonal to the extension line of the outside air introduction hole 11. . The bottom raised portion 13 is provided with two bottom ribs 13a protruding toward the inside of the container. By adopting such a configuration, the air flow path between the inner layer body 3 and the outer layer body 2 formed in the region where the outer layer rib 8 of the trunk portion 6 is provided is the region where the bottom rib 13a of the bottom portion 7 is provided. Will be continuously connected to the air flow path. Therefore, the expanded air can easily flow smoothly toward the outside air introduction hole 11, and the effect of preventing pressurization to the inner layer body 3 can be enhanced. In addition, the shape of the bottom rib 13a is not specifically limited, It can be set as arbitrary uneven | corrugated shape.

  In addition, the bottom raising part 13 combined two places on the extension line of the outside air introduction hole 11 and two places on the virtual line orthogonal to the extension line of the outside air introduction hole 11 like the double container 50 shown in FIG. You may provide in four places. In this case, since the contact ratio in the circumferential direction between the support surface and the grounding surface 12 when the double container 50 is placed on the support surface in a standing posture is small, the air that flows out from the outside air introduction hole 11 is outside the bottom portion 7. It becomes easy to flow out to the inside, and the effect of preventing pressurization of the expanded air on the inner layer body 3 can be enhanced.

  The above description shows only one embodiment of the present invention, and various modifications can be made within the scope of the claims. For example, the container main body 40 has been described as being formed by blow molding. However, the present invention is not necessarily limited to such a configuration. For example, the outer layer body (outer container) and the inner layer body (inner container) formed individually are combined. May be configured.

DESCRIPTION OF SYMBOLS 1 Double container 2 Outer layer body 3 Inner layer body 4 Mouth part 4a Male screw part 5 Pouring cap 6 Trunk part 7 Bottom part 8 Outer layer rib 9 Pinch-off part 10 Reinforcement rib 11 Outside air introduction hole 12 Grounding surface 13 Bottom raising part 13a Bottom rib 14 Inner bottom raising Portion 14a Bottom rib 15 Inner plug 16 Outlet plug 17 Lid 18 Cylindrical wall 19 Annular wall 20 Flange 21 Inclined wall 22 Vertical rib 23 Spherical body 24 Outgoing cylinder 25 Top wall 26 Outer wall 27 Top wall 28 Perimeter wall 29 Hinge 30 Seal cylinder 31 pin 40 Double container 50 Double container 100 Double container C Center axis M Filling space

Claims (6)

It has a bottle shape having a mouth portion, a body portion, and a bottom portion, and has an outer layer body provided with an outside air introduction hole penetrating the bottom portion inward and outward in the bottom portion, a filling space for contents, and the inside of the outer layer body A volume-reducing and deformable inner layer body accommodated in the container, a spout stopper provided with a spout for pouring out the contents contained in the filling space attached to the mouth, and the spout In a double container comprising a lid that can be freely opened and closed,
The body portion of the outer layer body is provided with outer ribs in the form of vertical ribs ,
The bottom portion includes a flat ground surface extending in the circumferential direction so as to surround the outside air introduction hole, and a concave bottom raising portion for intermittently contacting the ground surface in the circumferential direction,
The double container according to claim 1, wherein a bottom rib extending in a direction orthogonal to a parting line of the outer layer body is provided at the bottom raising portion .   The double container according to claim 1, wherein the outer layer rib is provided in a lower region of the trunk portion.   The double container according to claim 1, wherein the outer layer rib extends linearly in parallel with the central axis of the trunk portion.   The said outer layer rib is a double container as described in any one of Claims 1-3 provided in the position away from the parting line formed in the said trunk | drum in the circumferential direction. The double container as described in any one of Claims 1-4 with which the said raising part is provided in two places on the parting line of the said outer-layer body. The double container as described in any one of Claims 1-5 in which the said bottom raising part is provided in two places on the virtual line orthogonal to the parting line of the said outer-layer body.

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