JP6808379B2 - Laminate peeling container - Google Patents

Description

The present invention includes an outer layer body and a volume-reducing deformable inner layer body that is detachably laminated on the inner surface of the outer layer body, and is formed in a bottle shape having a cylindrical mouth portion and a body portion connected to the mouth portion. The present invention relates to a stopper-type laminated peeling container in which an injection cap is attached to a mouth portion by a stopper.

Laminated peeling containers used as containers for storing cosmetics such as lotion, toiletries such as shampoo and conditioner, liquid soap, and various liquids such as food seasonings as contents are outer layers constituting the outer shell of the container. The inner layer that can be reduced in volume and deformable is laminated and arranged on the inner surface of the body so that it can be peeled off, and the contents can be poured out by squeezing the body of the outer layer. On the other hand, after the pressing is released, the volume of the inner layer is reduced and deformed by introducing outside air between the inner layer and the outer layer through the air introduction hole provided in the mouth of the outer layer as the outer layer is restored. The outer layer can be restored to its original shape while being left in place. As a result, it is possible to pour out the contents without replacing the contents with the outside air, reduce the contact of the contents to be accommodated with the outside air, and suppress the deterioration and deterioration thereof.

Some such laminated peeling containers are formed by extruding and blow molding a laminated parison using a mold. In addition, a pouring cap is attached to the mouth of the laminated peeling container after molding, but for the purpose of obtaining the effect of preventing unauthorized opening, the pouring cap is replaced with a screw connection to the mouth and the mouth is plugged. A stopper type that is attached to a part is known.

For example, Patent Document 1 is a laminated peeling container formed by extrusion blow molding, which has a neck ring that projects radially outward with respect to the mouth portion between the mouth portion and the body portion. Described is a laminated peeling container that can be attached by plugging an injection cap into the mouth while supporting the lower surface of the neck ring facing the body side with a support.

Japanese Unexamined Patent Publication No. 2012-76758

As a plug-type laminated peeling container, in order to reduce the overall height, the neck ring is supported by a support by forming a concave shape that dents inward in the radial direction between the mouth and the body. It is conceivable that the configuration has a downward support surface. In this case, when the dispensing cap is plugged into the mouth, the support surface of the mouth is provided so that the pushing force of the dispensing cap into the mouth can be reliably supported by the support tool. It is preferably formed on a flat surface perpendicular to the axial direction.

However, in a laminated peeling container formed by extruding and blow molding a laminated parison using a mold, the inner surface of the container is formed in a shape along the outer surface of the container, so that the support surface is the mouth portion. When formed on a flat surface perpendicular to the axial direction, the inner surface of the container in the portion where the support surface is formed is strongly curved in a valley shape with the inner surface in the mouth portion. Therefore, there is a problem that the inner layer body is difficult to be separated from the outer layer body in the valley-shaped curved portion, and the airway from the air introduction hole to the body portion may not be secured.

On the other hand, if the inner surface of the container in the portion where the support surface is formed is formed so as to be gently inclined with respect to the inner surface in the upper and lower portions thereof, the support surface is also perpendicular to the axial direction of the mouth portion. It will be inclined with respect to the surface, and the strength of the support surface cannot be ensured.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a laminated peeling container made of extrusion blow molding, which can prevent poor peeling of the inner layer while ensuring the strength of the support surface. To provide.

The laminated peeling container of the present invention includes an outer layer body provided with an air introduction hole and a volume-reducing deformable inner layer body detachably laminated on the inner surface of the outer layer body, and has a cylindrical mouth portion and the mouth portion. It is a laminated peeling container formed in a bottle shape having a body portion connected to the above, and a pouring cap is attached to the mouth portion by a stopper, and the lower end of the mouth portion faces the body portion. An annular neck ring having a support surface perpendicular to the axial direction of the mouth portion is provided, and the support surface is provided with an inclined wall that is inclined in a direction that is located radially outward toward the upper side of the support surface. A plurality of notch grooves are provided, and a portion between the adjacent notch grooves of the neck ring is a rib-shaped portion, and the plurality of notch grooves and the rib-shaped portion of the neck ring are arranged side by side. The uneven portion of the neck ring is not provided with an inclination angle of the inner surface of the laminated peeling container in the provided uneven portion in a direction positioned radially outward toward the upper side with respect to the axial direction of the mouth portion. The inner surface of the laminated peeling container in the portion is characterized in that it is smaller than the inclination angle in the direction in which the upper side with respect to the axial direction of the mouth portion is located radially outward.

In the above-mentioned structure, the laminated peeling container of the present invention preferably has the uneven portion formed by the three notched grooves and the two rib-shaped portions.

In the above-mentioned configuration, in the laminated peeling container of the present invention, the air introduction hole is provided in a portion of the outer layer body corresponding to the mouth portion, and the uneven portion is provided in a portion of the neck ring below the air introduction hole. It is preferable that it is provided.

In the above-mentioned configuration, the laminated peeling container of the present invention preferably has the uneven portions on both side portions centered on the axis of the neck ring.

In the above configuration, the laminated peeling container of the present invention preferably has a trapezoidal shape in which the cross-sectional shape of the notch groove portion is narrower in the circumferential direction on the bottom side than on the opening side.

According to the present invention, it is possible to provide a laminated peeling container made of extrusion blow molding, which can prevent poor peeling of the inner layer while ensuring the strength of the support surface.

It is sectional drawing which shows the main part of the laminated peeling container which is one Embodiment of this invention together with a pouring cap. It is sectional drawing which follows the AA line in FIG. It is sectional drawing which follows the line BB in FIG. It is sectional drawing which follows the CC line in FIG. It is sectional drawing which follows the DD line in FIG.

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

As shown in FIG. 1, the laminated peeling container 1 according to the embodiment of the present invention is formed in a bottle shape having a mouth portion 11 and a body portion 12. In FIG. 1, only the upper portion of the body portion 12 is shown.

The mouth portion 11 is integrally formed with the main body portion 11a formed in a cylindrical shape whose tip side (upper end side in FIG. 1) is slightly reduced in diameter and the root portion of the main body portion 11a, and is formed on the main body portion 11a. On the other hand, it is provided with an annular sealing step portion 11b that protrudes outward in the radial direction.

The body portion 12 is formed in a bottomed tubular shape, and is integrally connected to the base end side (lower end side in FIG. 1) of the sealing step portion 11b of the mouth portion 11. The outer diameter of the portion of the body portion 12 in contact with the sealing step portion 11b is smaller than the outer diameter of the sealing step portion 11b. In the case shown in the figure, the body portion 12 has a shape having a portion whose diameter gradually increases downward from the side of the mouth portion 11, but the shape of the body portion 12 can be variously changed.

The laminated peeling container 1 has an outer layer body 21 and an inner layer body 22 detachably laminated on the inner surface of the outer layer body 21. The laminated stripping container 1 is a laminate made by extrusion blow molding formed by extrusion blow molding a laminated parison having a layer forming an outer layer 21 and a layer forming an inner layer 22 using a mold. It is a peeling container 1.

The inner layer 22 is formed in a thin bag shape that can be reduced in volume and deformed by a synthetic resin material such as an ethylene-vinyl alcohol copolymer (EVOH), and has a filling space inside the inner layer 22 for storing the contents. Further, the upper end portion of the inner layer body 22 is opened at the mouth portion 11 of the laminated peeling container 1.

The outer layer 21 constitutes the outer shell of the laminated peeling container 1, and is formed of, for example, a synthetic resin material such as polypropylene (PP), polyethylene (PE), or polyethylene terephthalate (PET). The portion of the outer layer 21 corresponding to the body portion 12 can be squeezed (pressed) and has resilience to the original shape.

The outer layer body 21 is provided with an air introduction hole 23 connected between the outer layer body 21 and the inner layer body 22. In the present embodiment, the air introduction hole 23 is provided in a portion of the outer layer body 21 corresponding to the mouth portion 11. Although only one air introduction hole 23 is shown in FIG. 1, the outer layer 21 is provided with two air introduction holes 23 so as to face each other with the axis thereof interposed therebetween. At least one air introduction hole 23 may be provided, but the space between the outer layer 21 and the inner layer 22 is divided into a plurality of spaces by a plurality of adhesive layers extending from the mouth 11 to the bottom. If so, it is preferable to provide the outer layer 21 with a plurality of air introduction holes 23 communicating with each space.

The injection cap 30 is attached to the mouth portion 11 of the laminated peeling container 1 by press-fitting, that is, tapping from the axial direction thereof. In FIG. 1, the laminated peeling container 1 is shown in a state in which a pouring cap 30 is attached to form a capped container 40.

An engaging protrusion 41 for tapping the injection cap 30 is integrally provided on the outer peripheral surface of the mouth portion 11. When the dispensing cap 30 is plugged into the mouth portion 11, the engaging protrusion 41 undercuts and engages with the annular concave groove 30a provided on the inner peripheral surface of the dispensing cap 30, and the dispensing cap 30 The removal from the mouth 11 is prevented. The engaging protrusion 41 is cut out in a vertical groove shape together with the outer peripheral surface of the mouth portion 11 at the portion of the air introduction hole 23.

When the dispensing cap 30 is attached to the mouth portion 11, the inner peripheral surface at the lower end of the dispensing cap 30 airtightly contacts the outer peripheral surface of the sealing step portion 11b, and the dispensing cap 30 and the mouth portion 11 are brought into contact with each other. An air passage 42 is formed between them. The air passage 42 communicates between the outer layer body 21 and the inner layer body 22 via the air introduction hole 23.

In the case shown in the figure, as the pouring cap 30, a pouring cylinder 32 forming a spout connecting to the pouring hole 31 for pouring the contents, and a check valve provided between the pouring hole 31 and the pouring cylinder 32. A valve 33, an air hole 34 for communicating the air introduction hole 23 to the outside via an air passage 42, a ball valve 35 for suckback for sucking back the contents, a lid 36 for closing the injection cylinder 32, and the like are provided. Although an example in which the above-mentioned structure is attached is shown, the contents contained in the laminated peeling container 1 can be ejected to the outside, and the inflow of air into the inner layer 22 after the injection of the contents is allowed. If the structure is such that the outer layer body 21 can be restored to its original shape while the inner layer body 22 is reduced in volume and deformed by introducing outside air between the outer layer body 21 and the inner layer body 22 while preventing the inner layer body 22. Injection caps 30 of various configurations can be attached. Further, when the air introduction hole 23 is provided in a portion other than the portion corresponding to the mouth portion 11 of the outer layer body 21, a pouring cap 30 having a configuration not provided with the air hole 34 may be used.

As described above, the outer diameter of the portion of the body portion 12 in contact with the sealing step portion 11b is smaller than the outer diameter of the sealing step portion 11b, so that the lower end of the sealing step portion 11b of the mouth portion 11 There is a step between the body and the body 12. The lower end portion of the mouth portion 11 generated by this step is a neck ring 50. That is, a neck ring 50 is provided at the lower end of the mouth portion 11 integrally with the sealing step portion 11b.

As shown in FIG. 2, the neck ring 50 is formed in an annular shape, and the lower surface of the neck ring 50 facing the body portion 12 is a support surface 50a formed on a flat surface perpendicular to the axial direction of the mouth portion 11. There is.

The support surface 50a is supported by the support tool on the support surface 50a when the pouring cap 30 is plugged into the mouth portion 11 of the laminated peeling container 1. Then, the pouring cap 30 is plugged from above the mouth portion 11 of the laminated peeling container 1 in a state of being supported by the support tool on the support surface 50a. At this time, since the support surface 50a is formed on a flat surface perpendicular to the axial direction of the mouth portion 11, the axial load applied from the support can be reliably received. By forming the support surface 50a on a flat surface perpendicular to the axial direction of the mouth portion 11 in this way, the strength of the support surface 50a can be ensured to a strength that can withstand the load applied at the time of plugging. it can.

Further, since the support surface 50a is provided at the lower end of the mouth portion 11, it is easy to secure the wall thickness of the portion where the support surface 50a is provided, and the support surface 50a is located directly below the mouth portion 11. Therefore, the axial load applied to the mouth portion 11 at the time of tapping can be reliably supported by the support tool via the support surface 50a. As a result, the tapping operation of the pouring cap 30 with respect to the laminated peeling container 1 can be stabilized.

By the way, since the laminated peeling container 1 is formed by extrusion blow molding, when the support surface 50a is formed into a flat shape perpendicular to the axial direction of the mouth portion 11, as shown in FIG. 3, the laminated peeling container 1 is formed. The inner surface of the portion where the neck ring 50 is provided is strongly curved in a valley shape with the inner surface of the mouth portion 11. Therefore, it becomes difficult for the inner layer body 22 to be separated from the outer layer body 21 at the portion strongly curved in the valley shape. Then, the inner layer 22 is less likely to be separated from the outer layer 21, which may cause a problem that the airway from the air introduction hole 23 to the body 12 cannot be secured.

Therefore, in the laminated peeling container 1 of the present invention, as shown in FIGS. 1 and 2, a plurality of notch grooves 60 are provided on the support surface 50a, and a portion between the notch grooves 60 adjacent to the neck ring 50 is provided. By providing at least one rib-shaped portion 61, the neck ring 50 is provided with a concavo-convex portion 62 in which a plurality of notched groove portions 60 and rib-shaped portions 61 are alternately arranged in the circumferential direction. In the present embodiment, the support surface 50a is provided with three notched grooves 60 at intervals in the circumferential direction, and the neck ring 50 is provided with two rib-shaped portions 61 partitioned between these notched grooves 60. By providing the uneven portion 62, the concave-convex portion 62 is configured to have three notched groove portions 60 and two rib-shaped portions 61.

As shown in FIG. 2, the notch groove portion 60 has a cross-sectional shape (shape of a cross section perpendicular to the axial direction of the mouth portion 11) on the bottom side (neck) rather than the opening side (radial outer side of the neck ring 50). The ring 50 is formed in a trapezoidal shape having a narrow circumferential width (inside in the radial direction). More specifically, the notch groove portion 60 has a pair of side walls 60a and an inclined wall 60b, and the pair of side walls 60a and the inclined wall 60b form a groove-like section. The pair of side walls 60a are formed on flat surfaces that are parallel to the axial direction of the mouth portion 11 and are inclined so as to approach each other from the outer side in the radial direction to the inner side in the radial direction. On the other hand, the inclined wall 60b is formed on a flat surface that is perpendicular to the pair of side walls 60a and is inclined with respect to the axial direction of the mouth portion 11 and the direction perpendicular to the axial direction. That is, the inclined wall 60b is inclined with respect to the support surface 50a.

On the other hand, each of the rib-shaped portions 61 is formed in a trapezoidal shape in which the circumferential width gradually decreases from the radial position side to the outside. Further, the surface of each rib-shaped portion 61 facing downward constitutes a part of the support surface 50a of the neck ring 50.

By providing the uneven portion 62 having the above configuration on the neck ring 50, as shown in FIGS. 4 and 5, the inner surface of the laminated peeling container 1 formed by extrusion blow molding in the portion where the uneven portion 62 is provided is necked. The shape may be such that the ring 50 is gently inclined with respect to the axial direction of the mouth portion 11 from the inner surface of the laminated peeling container 1 in the portion where the uneven portion 62 is not provided. That is, the inner surface of the laminated peeling container 1 in the portion of the neck ring 50 provided with the notch groove 60 is formed on the inclined wall 60b as shown in FIG. 4 because the notch groove 60 has the inclined wall 60b. Along the shape, the mouth portion 11 is formed so as to be gently inclined with respect to the axial direction. Further, since the inner surface of the laminated peeling container 1 in the portion of the neck ring 50 where the rib-shaped portion 61 is provided has a narrow circumferential width of the rib-shaped portion 61, only the outer layer 21 is the rib-shaped portion during extrusion blow molding. Following the shape of 61, the inner layer body 22 does not follow the shape of the rib-shaped portion 61, and therefore, as shown in FIG. 5, the inner surface is formed in a shape that is gently inclined with respect to the axial direction of the mouth portion 11. Will be done. The rib-shaped portion 61 of the neck ring 50 is provided with an inclination angle of the inner surface (shown in FIG. 4) of the laminated peeling container 1 with respect to the axial direction in the portion of the neck ring 50 where the notch groove portion 60 is provided. The inclination angle of the inner surface (shown in FIG. 5) of the laminated peeling container 1 in the formed portion with respect to the axial direction of the mouth portion 11 is gentler.

In this way, by providing the neck ring 50 with the uneven portion 62 having the plurality of notched groove portions 60 and the rib-shaped portion 61, the laminated peeling container 1 in the portion of the neck ring 50 provided with the uneven portion 62. The inner surface may be formed to be gently inclined with respect to the axial direction of the mouth portion 11 with respect to the inner surface of the laminated peeling container 1 in the portion of the neck ring 50 where the uneven portion 62 is not provided. As a result, the inner layer body 22 can be gently curved in a valley shape between the inner surface of the laminated peeling container 1 and the inner surface of the mouth portion 11 in the portion where the uneven portion 62 of the neck ring 50 is provided. The inner layer body 22 can be easily peeled from the outer layer body 21 at the curved portion, and the peeling failure of the inner layer body 22 can be prevented.

Further, the neck ring 50 is provided with a plurality of notch grooves 60 to gently incline the inner surface of the laminated peeling container 1, and the rib-shaped portions 61 are provided between these notch grooves 60 to provide the rib-shaped portions. The inclination of the inner surface of the laminated stripping container 1 can be made gentle even in the portion where the 61 is provided. Therefore, the neck ring 50 is provided with the support surface 50a on the uneven portion 62 by providing the rib-shaped portion 61 while sufficiently securing the circumferential width of the uneven portion 62 that facilitates the peeling of the inner layer body 22. The area of the support surface 50a can be secured to such an extent that a desired strength can be obtained. Further, by providing the rib-shaped portion 61 between the notch groove portions 60, the fork-shaped support is inserted into the neck ring 50 from any direction when the injection cap 30 is plugged. Can be reliably supported by the support surface 50a. Therefore, it is not necessary to position the laminated stripping container 1 in the rotational direction with respect to the support at the time of tapping, and the plugging operation can be facilitated.

In the present embodiment, the uneven portion 62 is provided in the portion of the neck ring 50 located on the lower side of the air introduction hole 23. This makes it easier to secure an airway between the air introduction hole 23 and the body portion 12, and it is possible to more reliably prevent poor peeling of the inner layer body 22.

Further, in the present embodiment, both sides of the neck ring 50 centered on the axis corresponding to the provision of a pair of air introduction holes 23 in a facing arrangement in the portion corresponding to the mouth portion 11 of the outer layer body 21. Concavo-convex portions 62 are provided on the portions, that is, on the left and right side portions in FIG. With such a configuration, it is easy to secure an airway between each of the air introduction holes 23 and the body portion 12, and it is possible to more reliably prevent peeling failure of the inner layer body 22.

When the concavo-convex portions 62 are provided on both side portions centered on the axis of the neck ring 50, the direction in which these concavo-convex portions 62 are provided is set in the direction of the pair of left and right molds used for extrusion blow molding. By matching the opening directions, the laminated peeling container 1 having the above structure can be easily molded.

It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist thereof.

For example, in the above-described embodiment, a pair of uneven portions 62 are provided on both side portions centered on the axis of the neck ring 50, but the present invention is not limited to this, and the uneven portions 62 are provided on the entire circumference of the neck ring 50. May be provided, or the uneven portion 62 may be provided only on a part of the neck ring 50.

Further, in the above-described embodiment, the notch groove portion 60 has a trapezoidal shape whose cross-sectional shape is narrower in the circumferential direction than the opening side, but the cross-sectional shape is not limited to this. Can be changed in various ways.

Further, the mouth portion 11 of the laminated peeling container 1 may have only the main body portion 11a and may not have the sealing step portion 11b. In this case, the neck ring 50 is provided at the lower end of the main body portion 11a of the mouth portion 11.

Further, in the above embodiment, the air introduction hole 23 is provided in the portion corresponding to the mouth portion 11 of the outer layer body 21, but the air introduction hole 23 is provided, for example, on the side surface of the body portion 12 of the outer layer body 21. It can be provided at various positions of the outer layer body 21, such as a corresponding portion and a portion corresponding to the bottom surface of the body portion 12.

1 Laminated peeling container 11 Port 11a Main body 11b Sealing step 12 Body 21 Outer layer 22 Inner layer 23 Air introduction hole 30 Outlet cap 30a Concave groove 31 Inject hole 32 Outlet cylinder 33 Check valve 34 Air hole 35 Ball valve 36 Lid body 40 Container with cap 41 Engagement protrusion 42 Air passage 50 Neck ring 50a Support surface 60 Notch groove 60a Side wall 60b Inclined wall 61 Ribbed part 62 Concavo-convex part

Claims (5)

It is provided with an outer layer body having an air introduction hole and a volume-reducing deformable inner layer body that is detachably laminated on the inner surface of the outer layer body, and is provided with a cylindrical mouth portion and a body portion connected to the mouth portion. A laminated peeling container that is formed in the shape of a bottle and has an injection cap attached to the mouth by a stopper.
An annular neck ring is provided at the lower end of the mouth portion so as to face the body portion and to have a support surface perpendicular to the axial direction of the mouth portion.
The support surface is provided with a plurality of notch grooves provided with an inclined wall that is inclined in a direction that is radially outwardly located on the upper side of the support surface, and is between the notch grooves adjacent to the neck ring. The part is a rib-shaped part,
The direction in which the inner surface of the laminated peeling container in the concavo-convex portion in which the plurality of notched grooves and the rib-shaped portions of the neck ring are provided side by side is located on the outer side in the radial direction toward the upper side with respect to the axial direction of the mouth portion. inclination angle, the inclination angle of the inner surface of said delamination container in the portion where uneven portion is not provided in the neck ring, a direction which is located radially outward as the upper side with respect to the axial direction of the opening to Laminated stripping container characterized by being smaller than . The laminated peeling container according to claim 1, wherein the uneven portion is composed of three notched grooves and two ribbed portions. The air introduction hole is provided in a portion of the outer layer body corresponding to the mouth portion.
The laminated peeling container according to claim 1 or 2, wherein the uneven portion is provided in a portion of the neck ring on the lower side of the air introduction hole. The laminated peeling container according to any one of claims 1 to 3, wherein the uneven portions are provided on both side portions centered on the axis of the neck ring. The laminated peeling container according to any one of claims 1 to 4, wherein the cross-sectional shape of the notch groove portion is a trapezoidal shape in which the width in the circumferential direction on the bottom side is narrower than that on the opening side.

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