JP5937022B2 - Double container - Google Patents

Description

  In the present invention, the inner layer body that contains the contents is formed in a two-layer structure that is housed inside the outer layer body, and when the contents are poured out, the outside air flows between the outer layer body and the inner layer body through the air inlet hole. The present invention relates to a double container that is incorporated so that only the inner layer body contracts.

  As a container for storing cosmetics such as skin lotion, shampoo, rinse, liquid soap, food seasoning, etc., an inner layer body having a storage section for storing contents and the inner layer body are detachably stored. The outer layer body is provided, and the contents are poured out by pressing the body portion of the outer layer body.On the other hand, after releasing the pressure, the air inlet hole provided in the mouth portion of the outer layer body allows the space between the inner layer body and the outer layer body. A double container is known in which outside air is introduced into the body so that the body can be restored while reducing the volume of the inner layer body (see, for example, Patent Document 1). Since this type of container can be poured out without replacing the contents with the outside air, the contact of the contents with the outside air can be reduced, and deterioration and alteration can be suppressed.

JP 2001-106263 A

  As such a double container, a delamination container called a delamination container is known. In this case, the double container is laminated by coextruding a synthetic resin for an outer layer and a synthetic resin for an inner layer, which have low compatibility. A parison is formed, and the laminated parison is blow-molded using a mold to form a laminated structure in which the outer layer body and the inner layer body are in close contact with each other. Therefore, after blow molding, air is pumped from the air inflow hole (for example, a through hole penetrating only the outer layer body or a slit-like opening of the pinch-off part formed at the bottom of the container), or negative pressure is sucked from the mouth. The inner layer body is shrunk so that the whole is peeled off from the outer layer body, then air is sent into the inner layer body, the whole body is brought into close contact with the outer layer body again, and when the contents are poured out, Is easy to peel from the outer layer body.

  However, in the conventional double container, as described above, even after the inner layer body is once completely peeled off from the outer layer body after blow molding, the entire inner surface of the inner layer body again adheres to the entire inner surface of the outer layer body. Therefore, when the contents are poured out, it is difficult for air to enter between the outer layer body and the inner layer body from the air inflow hole, and the inner layer body may be poorly peeled or the outer layer body may be deformed. In particular, when an air inflow hole is provided at the bottom of the container using a pinch-off portion, the above problem is particularly likely to occur because the contents accumulate at the bottom and spread the inner layer body and adhere to the outer layer body.

  An object of the present invention is to solve such a conventional problem. The purpose of the present invention is to facilitate separation of the inner layer body from the outer layer body in the case where an air inflow hole is provided in the bottom portion. An object of the present invention is to propose a double container capable of preventing the occurrence of defective peeling of the inner layer body and deformation of the outer layer body when the object is poured out.

  The double container of the present invention has a bottle shape having a mouth portion, a body portion, and a bottom portion, an outer layer body provided with an air inflow hole penetrating the bottom portion inward and outward in the bottom portion, and an open end of the mouth portion A double container having an opening continuous with the container and a container for contents contained in the opening, and an inner layer accommodated in the outer layer body, provided in a lower region of the trunk of the outer layer body, An outer layer rib that is convex toward the inside of the inner layer body, and a convex inner layer rib that is provided on the inner layer body and corresponds to the inner surface of the outer layer rib, or between the outer layer rib and the inner layer rib, or A gap is provided between the outer layer body and the inner layer body in a lower region of the outer layer rib.

  In the above-described configuration, it is preferable that the outer layer rib includes a bottom wall portion having an inner surface shape that forms an angle of 90 ° or less with a body portion of the outer layer body continuous below the outer layer rib in a longitudinal cross-sectional shape.

  In the above configuration, the outer layer ribs are formed as a pair of adjacent outer layer ribs that are spaced apart from each other in the lateral direction, and the pair of outer layer ribs have a pair of outer layer rib side walls that are spaced from and opposed to each other. The pair of outer layer rib side walls preferably have an undercut shape in the cross-sectional shape.

  In the above configuration, a pair of upper outer layer ribs having the same structure as the pair of outer layer ribs is further provided above the pair of outer layer ribs, and the inner layer body corresponds to the inner surfaces of the pair of upper outer ribs. It is preferable that a pair of convex upper inner layer ribs are further provided, and a gap is provided between the pair of upper outer layer ribs and the pair of upper inner layer ribs.

  According to the present invention, in the lower region of the body portion of the outer layer body, an outer layer rib that is convex toward the inside of the container is provided, and the inner layer body is provided with a convex inner layer rib corresponding to the inner surface of the outer layer rib, Since a gap is provided between the outer layer rib and the inner layer rib, re-adhesion of the inner layer body to the outer layer body in the lower region of the body portion is prevented, and air is introduced from the air inflow hole provided in the bottom portion to the body portion. A path can be secured, and as a result, the inner layer body can be easily peeled from the outer layer body, and the peeling failure of the inner layer body of the double container and the deformation of the outer layer body can be prevented.

It is a front view which shows the lamination peeling container which is one Embodiment of the double container of this invention in the state equipped with the pouring stopper. It is a bottom view of the lamination peeling container shown in FIG. It is sectional drawing which follows the AA line in FIG. It is sectional drawing which follows the BB line in FIG. It is sectional drawing which follows the AA line in FIG. 1, and is sectional drawing which shows the state before peeling processing. It is sectional drawing which follows the BB line in FIG. 1, and is sectional drawing which shows the state before peeling processing. It is a figure which shows the modification of the lamination peeling container which is one embodiment of the double container of this invention in the state which mounted | wore with the pouring stopper, and is sectional drawing corresponding to FIG. It is a front view which shows the lamination peeling container which is other embodiment of the double container of this invention in the state equipped with the pouring stopper. It is sectional drawing which follows the CC line in FIG. It is sectional drawing which follows the DD line | wire in FIG.

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

  As shown in FIGS. 1 to 4, the delamination container 1 which is an embodiment of the double container of the present invention includes an outer layer body 2 constituting an outer shell and an inner layer body housed in the outer layer body 2. 3. The delamination container 1, also called a delamination container, is formed by, for example, coextruding a synthetic resin for an outer layer having low compatibility and a synthetic resin for an inner layer to form a laminated parison, and this laminated parison is formed using a mold. By performing blow molding, as shown in FIGS. 5 to 6, the inner layer body 3 is formed in a laminated structure in which the inner layer body 3 is detachably adhered to the inner surface of the outer layer body 2. Then, after blow molding, the inner layer body 3 is contracted to peel the entire body from the outer layer body 2, then air is sent into the inner layer body 3, and the whole is brought into close contact with the outer layer body 2 again. The inner layer body 3 is made easy to peel from the outer layer body 2 at the time of dispensing.

  After this inner layer body 3 is peeled off, in this example, a relatively low-viscosity liquid content such as cosmetics such as lotion and food seasonings is accommodated in the inner layer body 3 and poured out by its own weight. By attaching the type of spout 4, the final product state as shown in FIGS. 1 to 4 is obtained. Note that, for example, a push-down pump can be attached in place of the self-weight pouring type pouring tap 4, but in that case, a relatively high viscosity liquid such as shampoo, rinse or liquid soap is used. The shaped contents can also be accommodated in the inner layer body 3. The detailed structure of the spout 4 will be described later.

  Before the peeling treatment of the inner layer body 3 after blow molding, as shown in FIG. 6, the outer layer body 2 has a mouth portion 2a formed in a cylindrical shape with a circular cross section and a cross section integrally connected to the mouth portion 2a. It has a bottle shape having a circular body portion 2b and a bottom portion 2c integrally connected to the body portion 2b. At the bottom 2c of the outer layer body 2, a linear pinch-off portion 2d is formed in the center corresponding to a portion in which the laminated parison is crushed and pinched (pinched off) with a die, that is, a blow split die during blow molding. Yes. The inner layer body 3 is formed in a bag shape thinner than the outer layer body 2, and the outer surface thereof is in close contact with the inner surface of the outer layer body 2 so as to be peeled off. The opening 3a of the inner layer body 3 is connected to the opening end of the mouth portion 2a of the outer layer body 2, and the inside of the inner layer body 3 is a housing portion 3b continuous to the opening 3a. The contents described above are accommodated in the accommodating portion 3b. The bottom portion 3c of the accommodating portion 3b of the inner layer body 3 is formed with a biting portion 3d corresponding to the pinch-off portion 2d of the outer layer body 2 described above, and this biting portion 3d bites into the pinch-off portion 2d of the outer layer body 2. It is out.

  Further, in the lower region of the body portion 2b of the outer layer body 2, as shown in FIGS. 5 to 6, outer layer ribs 5 convex toward the inside of the container 1 are symmetrical with respect to the axis O of the container 1. Two are formed. In this example, each of these outer layer ribs 5 is composed of an upper wall portion 5a, a side wall portion 5b, and a bottom wall portion 5c, and has a U-shaped cross section extending in the lateral direction (a direction orthogonal to the axis O of the container 1). It is formed as a rib. Further, the inner layer body 3 is formed with convex inner layer ribs 6 corresponding to the inner surfaces of the outer layer ribs 5 of the outer layer body 2.

  In this state, for example, negative pressure suction is performed from the opening 3 a of the inner layer body 3, and the inner layer body 3 is contracted as described above, and the whole is peeled off from the outer layer body 2. At that time, the biting portion 3d of the bottom portion 3c of the inner layer body 3 escapes from the pinch-off portion 2d of the outer layer body 2, and as a result, the pinch-off portion 2d of the outer layer body 2 has a pinch-off portion 2d as shown in FIGS. A slit-like opening 7 is formed. Next, as described above, air is sent into the inner layer body 3 and the whole is brought into close contact with the outer layer body 2 again. However, the inner layer rib 6 does not completely fit into the outer layer rib 5 at that time. As shown in FIGS. 3 and 4, a gap G is formed between the outer layer rib 5 and the inner layer rib 6 and between the outer layer body 2 and the inner layer body 3 in a region below the outer layer rib 5. The gap G is secured as shown in FIGS. 3 to 4 without being crushed by the inner layer body 3 that is pushed out by the weight of the contents even after the contents are accommodated.

  Instead of the above-described configuration, the outer layer rib 5 ′ may be formed as a rib that includes a horizontal bottom wall portion 5c and an inclined wall portion 5d and extends in the lateral direction, as shown in FIG. 7, for example. In this case as well, as in the example shown in FIGS. 3 and 4, the outer layer body 2 and the inner layer body between the outer layer rib 5 ′ and the inner layer rib 6 ′ and in the region below the outer layer rib 5 ′. A gap G can be ensured between

  Further, in the example shown in FIGS. 3 and 4 and the example shown in FIG. 7, the bottom wall portion 5c of the outer layer ribs 5 and 5 ′ is connected to the lower side of the outer layer ribs 5 and 5 ′ in the longitudinal sectional shape. The inner layer body 3 is formed so as to have an inner surface shape that forms an angle of 90 ° with the body portion 2b of the outer layer body 2. However, as the angle (that is, the angle θ in FIGS. 4 and 7) is reduced, the inner layer body 3 is moved to the outer layer body 2. Can be reliably prevented from fitting the lower region portion of the inner layer ribs 6 and 6 ′ of the inner layer body 3 into the lower region portion of the outer layer ribs 5 and 5 ′. The gap G can be more reliably ensured between the outer layer body 2 and the inner layer body 3 in the region below the outer layer ribs 5 and 5 ′.

  After the contents are accommodated, the spout 4 is attached to the mouth 2a of the outer layer body 2 as shown in FIG. The spout 4 has a spout cap 8, a holder 9, and a spherical body 10. The pouring cap 8 has a pouring cylinder 8a that forms a pouring outlet for the contents at the upper portion thereof, and includes a top wall 8b that is integrally connected to the pouring cylinder 8a and covers the mouth 2a of the outer layer body 2. Yes. A peripheral wall 8c surrounding the mouth portion 2a is integrally connected to the outer peripheral edge of the top wall 8b, and a threaded portion 8d corresponding to the screw portion 2e provided in the mouth portion 2a is provided on the inner peripheral surface of the peripheral wall 8c. Provided. In addition, it may replace with the screw part 2e and the to-be-threaded part 8d, and you may make it hold | maintain the extraction | pouring cap 8 by an undercut. Further, an annular body 8e is provided on the back surface of the top wall 8b so as to be continuous with the inner peripheral surface of the dispensing cylinder 8a. A lid 8g is connected to the peripheral wall 8c of the dispensing cap 8 via a hinge 8f. An annular lid sealing wall 8h for sealing the spout is provided inside the lid 8g.

  The holder 9 is provided inside the pouring cap 8. The holder 9 includes a cylindrical body 9a that extends from the outlet to the filling space M through the extraction cylinder 8a. The cylindrical body 9 a is integrally connected to a top wall 9 b that covers the opening end of the mouth portion 2 a of the outer layer body 2, and is sandwiched between the mouth portion 2 a and the top wall 8 b of the dispensing cap 8. Further, an annular seal wall 9c is provided on the back surface of the top wall 9b so as to contact the inner layer body 3 and prevent leakage of contents. Here, the annular body 8e is inserted in the upper part of the cylinder 9a.

  A plurality of vertical ribs 9d are provided on the inner peripheral surface of the cylindrical body 9a at intervals in the circumferential direction and extending along the axis of the cylindrical body 9a. A gap is formed between the vertical ribs 9d. Furthermore, the vertical rib 9d includes a protrusion 9e that protrudes radially inward on the spout side.

  In addition, the cylindrical body 9a includes a conical inclined wall 9f whose diameter decreases toward the filling space M at the end on the filling space M side. And the edge part by the side of the filling space M of the inclined wall 9f is opened, and the injection port 9g connected to a spout is formed.

  The spherical body 10 is provided inside the cylindrical body 9a. In the standing posture of the outer layer body 2, the spherical body 10 is in contact with the inclined wall 9f over the entire circumference by its own weight.

  According to such a configuration, when the container 1 shown in FIG. 4 is changed to the inclined posture, the spherical body 10 moves until it hits the protrusion 9e, and the contents in the filling space M that has passed through the injection port 9g are adjacent to each other in the vertical direction. It is poured out from the spout through the gap formed between the ribs 9d, the spherical body 10, and the cylindrical body 9a. At this time, the slit shape formed in the bottom 3c of the outer layer body 2 The opening 7 functions as an air inflow hole. Since the outer layer rib 5 is provided on the outer layer body 2 and the inner layer rib 6 is provided on the inner layer body 3, a gap G is secured between the outer layer rib 5 and the inner layer rib 6. It is possible to easily introduce the outside air between the inner layer body 3 and the outer layer body 2 from the opening 7. As a result, the inner layer body 3 can be easily peeled from the outer layer body 2.

  Next, another embodiment of the double container of the present invention will be described with reference to FIGS. The laminated peeling container 1 ′ of this example is different from the laminated peeling container 1 except that the outer layer ribs 5 and 5 ′ and the inner layer ribs 6 and 6 ′ in the laminated peeling container 1 described with reference to FIGS. Have the same configuration. FIG. 8 is a front view showing the delamination container 1 ′ of this example in a state where a spout is attached. FIG. 9 is a cross-sectional view taken along line CC in FIG. 10 is a cross-sectional view taken along the line DD in FIG.

  As shown in FIGS. 8 to 10, a pair of lower outer layer ribs 51 that are spaced apart from each other in the lateral direction and are adjacent to each other are formed in the lower region of the body portion 2 b of the outer layer body 2 of the delamination container 1 ′. . A pair of upper outer ribs 52 having the same structure as that of the pair of lower outer ribs 51 are formed in a region slightly below the central portion in the vertical direction of the body portion 2b. Each of the pair of lower outer layer ribs 51 and the pair of upper outer layer ribs 52 is formed symmetrically across the axis O of the container 1.

As shown in FIGS. 9 and 10, the pair of lower outer layer ribs 51 includes a pair of outer layer rib side walls 51 a that face each other while being separated from each other. As shown in FIG. 9, the pair of outer layer rib side wall portions 51a has a cross-sectional shape in which the distance d1 between the outer end portions is the most between the _one side wall portion 51a and the other side wall portion 51a. interval is an undercut shape becomes larger than the distance d ₂ of the narrow portion.

Before the peeling process (not shown), the inner layer body 3 is in close contact with the outer layer body 2, and a pair of lower inner layer ribs corresponding to the pair of lower outer layer ribs 51 and the pair of upper outer layer ribs 52 described above. 61 and a pair of upper inner layer ribs 62 are formed. Then, by performing a release treatment, as shown in FIGS. 9 and 10, the gap G ₁ is formed between the pair of lower outer rib 51 and the pair of lower inner rib 61. At this time, by providing the above-described undercut shape, the undercut shape portion between the pair of lower inner layer ribs 61 can be fitted into the undercut shape portion between the pair of lower outer layer ribs 51. to be prevented, it is possible to reliably ensure the gap G ₁ between the pair of lower inner rib 61 and the pair of lower outer rib 51. Similarly, also the gap G ₂ is formed between the pair of upper outer rib 52 and a pair of upper inner rib 62, the undercut shape, the gap G ₂ is is reliably ensured.

The gap G ₁ and the gap G ₂ communicate with each other vertically so that the slit-like opening 7 formed in the bottom 2 c of the outer layer body 2 serves as an air inflow hole and the outer layer body 2 and the inner layer body 3. The air introduction path from the air inflow hole to the vicinity of the central portion in the vertical direction of the body portion 2b can be secured.

  Therefore, it is possible to more easily introduce outside air between the inner layer body 3 and the outer layer body 2 from the opening 7 serving as an air inflow hole when the contents are poured out. As a result, the inner layer body 3 can be more easily separated from the outer layer body 2.

  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 positions where the outer layer ribs and the inner layer ribs are provided can be appropriately adjusted as long as they are within the lower region of the body portion of the container, and the shape and number of the ribs can be changed. Additional outer layer ribs and inner layer ribs may also be provided in the center or upper region of the container body. In addition, the laminated peeling container other than the squeeze type has been described as an example. However, the slit-like opening formed in the pinch-off part at the time of the peeling process is reduced by, for example, partially bonding the opening. And it can also be used as a squeeze-type delamination container. Furthermore, the double container of the present invention is not limited to a laminate peeling container in which an outer layer body and an inner layer body are integrally formed by blow molding of a laminated parison, but after the outer layer body and the inner layer body are separately formed, It can also be set as the double container of the structure made to incorporate in the inside of an outer layer body.

1,1 'Lamination peeling container 2 Outer layer body 2a Mouth part 2b Body part 2c Bottom part 2d Pinch-off part 2e Screw part 3 Inner layer body 3a Opening part 3b Storage part 3c Bottom part 3d Biting part 4 Outlet plug 5, 5' Outer rib 5a top Wall portion 5b Side wall portion 5c Bottom wall portion 5d Inclined wall portion 6, 6 'Inner layer rib 7 Opening portion 8 Pouring cap 8a Pouring cylinder 8b Top wall 8c Peripheral wall 8e Ring body 8f Hinge 8g Lid 8h Lid seal wall 8d Covered Threaded portion 9 Holder 9a Cylindrical body 9b Top wall 9c Seal wall 9d Vertical rib 9e Projection 9f Inclined wall 9g Inlet 10 Spherical body 51 A pair of lower outer layer ribs (a pair of outer layer ribs)
51a A pair of outer layer rib side walls 52 A pair of upper outer layer ribs 61 A pair of lower inner layer ribs 62 A pair of upper inner layer ribs G, G ₁ , G ₂ gap M Filling space d ₁ , d ₂ interval θ angle

Claims (4)

An outer layer body having a bottle shape having a mouth portion, a body portion, and a bottom portion, and having an air inflow hole penetrating the bottom portion inward and outward in the bottom portion, an opening portion connected to the opening end of the mouth portion, and the opening portion In a double container comprising a container for contents that are connected to the inner layer body and the inner layer body housed in the outer layer body,
An outer layer rib provided in a lower region of the body portion of the outer layer body and having a convex shape toward the inside of the container;
Providing the inner layer body with a convex inner layer rib corresponding to the inner surface of the outer layer rib,
A double container having a gap between the outer layer rib and the inner layer rib or between the outer layer body and the inner layer body in a region below the outer layer rib.   2. The double container according to claim 1, wherein the outer layer rib includes a bottom wall portion having an inner surface shape that forms an angle of 90 ° or less with a body portion of the outer layer body that is continuous below the outer layer rib in a longitudinal sectional shape. .   The outer layer ribs are formed as a pair of adjacent outer layer ribs spaced apart from each other in the lateral direction, and the pair of outer layer ribs have a pair of outer layer rib side walls facing each other while being separated from each other, and the pair of outer layer ribs The double-sided container according to claim 1 or 2, wherein the side wall portion has an undercut shape in a cross-sectional shape.   A pair of upper outer ribs having the same structure as the pair of outer layer ribs are further provided above the pair of outer layer ribs, and the inner layer body has a pair of convex shapes corresponding to the inner surfaces of the pair of upper outer ribs. The double container according to claim 3, further comprising an upper inner rib, and a gap between the pair of upper outer rib and the pair of upper inner rib.

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