JP7314537B2 - cap for multiple containers - Google Patents

Description

TECHNICAL FIELD The present invention relates to a multi-container cap that is attached to the mouth of a multi-container.

BACKGROUND ART Multi-layer containers called delamination bottles, airless bottles, delamination containers, and the like are known as containers for storing contents such as liquid seasonings or liquid cosmetics and maintaining their freshness.

As a method for filling the contents into the multiple container, there is a normal temperature filling method in which the contents are filled at normal temperature, and a high temperature filling method in which the contents are heated to a predetermined temperature higher than normal temperature and filled. In the high-temperature filling method, a blow-molded container is filled with high-temperature contents by a high-temperature filling process, and then a cooling process is performed in which the contents are cooled to room temperature by sprinkling cooling water over the entire container while the cap is attached and sealed.

However, in conventional multiple containers, heat shrinkage occurs in the inner container due to high-temperature filling, and the gap between the outer container and the inner container formed by this thermal contraction, the space inside the cap, etc. become decompressed, and there is a problem that cooling water easily enters the cap. In order to solve the above problem, Patent Document 1 below discloses that a plurality of ventilation grooves are formed to ventilate the space between the cap main body and the upper lid with the outside air, thereby facilitating the discharge of cooling water that has entered the cap.

JP 2017-214084 A

However, with the cap disclosed in Patent Document 1, when the inner container thermally shrinks due to high-temperature filling and the air gap between the outer container and the inner container becomes negative pressure, there is a risk that cooling water that has entered the cap will be sucked through the air intake holes provided in the cap. It is difficult to remove the cooling water that has entered the gap between the outer container and the inner container, and depending on the amount of water that has entered, the product may have to be discarded as a defective product.

The present invention has been made in view of the circumstances described above, and an object thereof is to solve the problems described above. That is, one example of the object of the present invention is to provide a multiple container cap that can prevent cooling water from entering the gap between the inner container and the outer container during hot filling.

本発明に係る多重容器用キャップは、内容物を収容する内容器と、前記内容器を内包する外容器とが剥離可能に積層され、前記内容器と前記外容器との間に外気を導入するための外気導入孔を口部に備える容器本体の前記口部に装着される多重容器用キャップにおいて、前記外気を吸気すると共に前記外気導入孔と連通する吸気孔が、前記内容物の注出口を備える上板部に設けられるキャップ本体と、前記キャップ本体に被せられ、閉じたときに前記上板部と対向するように設けられる天板部を備える蓋と、を含み、前記天板部には、前記蓋を閉じたときに前記吸気孔を閉塞する閉塞部が設けられ、前記吸気孔は、前記上板部から前記天板部に向かって突出して設けられる突出部により形成され、前記閉塞部は、前記天板部の内面から前記吸気孔に向かって突出して設けられる栓体であり、前記栓体は、前記蓋を閉じたときに前記突出部の上端に当接する底部と、前記蓋を閉じたときに前記突出部の上部外面を覆う周壁部とを備え、前記底部及び前記周壁部によって前記吸気孔を閉塞し、互いに当接し得る前記突出部の上端角部と前記栓体の前記周壁部の先端角部とは、面取り処理が施されている。
Further, a multiple container cap according to the present invention is a multiple container cap that is attached to the mouth of a container body in which an inner container for containing a content and an outer container for enclosing the inner container are detachably laminated, and an outside air introduction hole for introducing outside air between the inner container and the outer container is attached to the mouth of a container body, wherein an intake hole for sucking outside air and communicating with the outside air introduction hole is provided on an upper plate portion provided with an outlet for the contents, and the cap body is covered. a cover provided with a top plate portion provided to face the top plate portion when closed, wherein the top plate portion is provided with a blocking portion that blocks the air intake hole when the lid is closed; the air intake hole is formed by a projecting portion that projects from the top plate portion toward the top plate portion; the blocking portion is a plug that projects from an inner surface of the top plate portion toward the air intake hole; A chamfering treatment is performed on the upper end corner portion of the protrusion and the tip end corner portion of the plug, which are capable of closing the intake hole and coming into contact with each other.

Preferably, the multiple container cap includes an outside air introduction valve that opens communication between the intake hole and the outside air introduction hole when the outside air is introduced between the inner container and the outer container, and blocks communication between the intake hole and the outside air introduction hole after the outside air is introduced between the inner container and the outer container.

Preferably, in the multiple container cap, the lid is rotatably connected to the cap body via a hinge, and the intake hole is provided between the spout and the hinge.

Preferably, in the multi-container cap, when the outer container is pressed by a squeezing operation, the outer container bends and deforms inward, and when the pressing is released by stopping the squeezing operation, it returns to its original shape before being pressed.

Preferably, in the multiple-container cap, a gap is formed by introducing the outside air between the inner container and the outer container, and when the multiple-container cap is attached to the mouth of the container body and the lid is closed, the closing portion closes the intake hole, and the gap functions as an air layer for heat insulation of the contents.

In the multi-container cap according to the present invention, when the lid is closed, the air intake hole of the outside air introduction portion provided in the upper plate portion of the cap is closed, so that the gap formed between the outer container and the inner container can be prevented from entering water from the outside.

4 is a diagram schematically showing a longitudinal section of the container body of the multiple container according to Embodiment 1. FIG. FIG. 3 is a diagram schematically showing a longitudinal section of the multiple container cap according to Embodiment 1; It is a figure which expands and shows the K section shown by FIG. 8A to 8C are diagrams showing, in different forms, the states in which the intake hole of the external air introduction section is covered and blocked by the second plug section when the lid is closed. FIG. 8A to 8D are diagrams showing, in different forms, the state in which a part of the second plug is inserted into the air intake hole of the outside air introduction section to close the lid when the lid is closed; FIG. FIG. 10 is a diagram schematically showing a vertical cross section of a multiple container cap according to Embodiment 2; 8(a) and 8(b) are diagrams showing examples of the form of the closing portion of the multiple container according to Embodiment 2. FIG. FIG. 10 is a diagram schematically showing a vertical cross section of an insulated bottle that is a multiple container according to Embodiment 3;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the present embodiment, the direction along the central axis Z of the bottle-shaped multiple container 1 is also referred to as the "axial direction," the direction rotating around the central axis Z of the multiple container 1 as the rotation axis is also referred to as the "circumferential direction," and the direction perpendicular to the central axis Z of the multiple container 1 is also referred to as the "radial direction." In this embodiment, the axial direction from the mouth 3 to the bottom 6 of the multiple container 1 is also called "downward", and the axial direction from the bottom 6 to the mouth 3 of the multiple container 1 is also called "upward". Further, in the present embodiment, a cross section obtained by cutting the multiple container 1 along a plane along the central axis Z of the multiple container 1 is also referred to as a "longitudinal section", and a cross section obtained by cutting the multiple container 1 along a plane orthogonal to the central axis of the multiple container 1 is also referred to as a "cross section".

[Embodiment 1]
<Structure of multiple containers>
FIG. 1 is a diagram schematically showing a longitudinal section of a container body 2 of a multiple container 1 according to Embodiment 1. FIG. The multiple container 1 shown in FIG. 1 shows a state after the inner surface of the outer container 10 and the outer surface of the inner container 20 are peeled off, like the state after the content is filled.

The multiple container 1 is a bottle-shaped container. The multiple container 1 includes a multi-layered container body 2 for containing contents, and a multiple container cap 50 (hereinafter also simply referred to as "cap 50", see FIG. 2) attached to the mouth portion 3 of the container body 2.

As shown in FIG. 1, the container body 2 includes a mouth portion 3 which is one end portion of the container body 2 and from which the contents are poured out, a bottom portion 6 which is the other end portion of the container body 2 and has a ground surface, a shoulder portion 4 extending downward from the mouth portion 3 while expanding radially outward, and a trunk portion 5 extending downward from the shoulder portion 4 and continuing to the bottom portion 6.

The container body 2 includes an outer container 10 that constitutes the outer shell of the container body 2 and encloses an inner container 20, and an inner container 20 that has a storage space S1 for storing contents and can be contracted as the contents decrease. The container body 2 is a double-structured bottle in which the outer surface of the inner container 20 and the inner surface of the outer container 10 are layered in a detachable manner.

The outer container 10 and the inner container 20 are containers made of thermoplastic resin and manufactured by blow molding. Preferably, the outer container 10 and the inner container 20 are manufactured by biaxial stretch blow molding using test tube-shaped preforms. Specifically, the outer container 10 and the inner container 20 are manufactured by simultaneously stretching and blow molding the preform of the outer container 10 and the preform of the inner container 20 in a state in which the preform of the inner container 20 is inserted into the preform of the outer container 10 and stacked. Alternatively, the outer container 10 and the inner container 20 may be manufactured by stretch blow molding the preform of the outer container 10 and then stretch blow molding the preform of the inner container 20 inside the outer container 10 .

The outer container 10 and the inner container 20 are made of polyolefin resin, ethylene-vinyl copolymer, styrene resin, vinyl resin, polyamide resin, polyester resin, polycarbonate resin, polyphenylene oxide resin, or biodegradable resin. Preferably, the outer container 10 and the inner container 20 are manufactured using polyolefin resin or polyester resin. More preferably, the outer container 10 and the inner container 20 are manufactured using a polyester-based resin. Examples of the polyester-based resin include resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and copolyester thereof. Particularly preferably, the outer container 10 and the inner container 20 are manufactured using polyethylene terephthalate resin.

The outer container 10 is formed so that the bottom portion 6 is grounded and self-supporting. The outer container 10 is formed so that the shapes of the mouth portion 3, the shoulder portion 4, the body portion 5 and the bottom portion 6 are maintained in a self-supporting and upright posture. The shoulder portion 4 and the body portion 5 of the outer container 10 are formed so as to bend and deform inwardly when pressed by a squeezing operation, and to restore their original shapes before being pressed when the pressing is released.

The mouth portion 3 of the outer container 10 is formed to have higher rigidity than the body portion 5 of the outer container 10 . An upper end portion of the mouth portion 3 of the outer container 10 is provided with an opening portion 11 into which the mouth portion 3 of the inner container 20 is inserted. The inner diameter of the opening 11 of the outer container 10 is larger than the outer diameter of an opening 21 provided in the mouth 3 of the inner container 20, which will be described later. When the inner container 20 is accommodated in the outer container 10 , the inner peripheral edge of the opening 11 of the outer container 10 is arranged in contact with the outer peripheral edge of the opening 21 . The edge of the opening 11 is formed in a flange shape protruding radially outward along the circumferential direction, and contacts the edge of the opening 21 of the inner container 20 to support the inner container 20 .

A support ring 12 used for gripping and transporting the outer container 10 is provided below the mouth portion 3 of the outer container 10 . The support ring 12 is provided so as to protrude radially outward and extend in the circumferential direction. Between the opening 11 of the outer container 10 and the support ring 12 is provided an outside air introduction hole 13 for introducing outside air into the gap A between the outer container 10 and the inner container 20 . As shown in FIG. 1, the outside air introduction hole 13 is formed through the inner surface of the outer container 10 from the groove bottom of the mounting portion 14, which will be described later, and is provided so as to communicate with the space A. As shown in FIG. The gap A is formed between the shoulder portion 4 and the bottom portion 6 of the outer container 10 and the shoulder portion 4 and the bottom portion 6 of the inner container 20 when the inner container 20 is separated from the outer container 10, and is a space in which an air layer is formed by the outside air introduced through the outside air introduction hole 13.

Between the opening 11 of the outer container 10 and the support ring 12, a mounting portion 14 to which the cap 50 is mounted is provided. The mounting portion 14 is configured by a concave groove formed along the circumferential direction so that it can be mounted in a capping manner. Alternatively, the mounting portion 14 may be configured with helical threads or grooves to allow the cap 50 to be screwed on.

The inner container 20 has an accommodation space S1 for accommodating contents and is formed to have a shape along the outer container 10 . The shoulder portion 4 and the body portion 5 of the inner container 20 are formed to have a thickness thinner than that of the outer container 10 so as to shrink as the contents decrease.

The mouth portion 3 of the inner container 20 is formed to have higher rigidity than the body portion 5 of the inner container 20 and is fixed to the mouth portion 3 of the outer container 10 . The mouth portion 3 of the inner container 20 is provided with an opening 21 at its upper end for communicating the inner container 20 and the cap 50 . The edge of the opening 21 is formed in a flange shape protruding radially outward along the circumferential direction, and contacts the edge of the opening 11 of the outer container 10 to regulate the position of the outer container 10 . The mouth portion 3 of the inner container 20 is formed such that at least the outer diameter below the outside air introduction hole 13 is smaller than the inner diameter of the mouth portion 3 of the outer container 10 so that the gap A is formed.

As an example of a method for separating the inner container 20 from the outer container 10, the inner container 20 is thermally shrunk by a high-temperature filling process to promote separation. Further, since the container main body 2 is filled with high-temperature contents in the high-temperature filling process, the mouth portion 3 may be thermally crystallized by heat treatment in the preform stage to suppress deformation of the mouth portion 3 . The contents of the multiple container 1 are, for example, a beverage heated to a high temperature (regardless of whether it is a hot beverage or a cold beverage), a liquid seasoning, and the like.

<Configuration of cap>
FIG. 2 is a diagram schematically showing a longitudinal section of the cap 50 of the multiple container 1 according to Embodiment 1. FIG. 3 is an enlarged view of the K portion shown in FIG. 2. FIG.

The cap 50 is a cap for pouring out the contents housed in the housing space S1 of the multiple container 1 to the outside of the multiple container 1 by a squeezing operation. The cap 50 includes a cap body 60, a lid 70, an inner plug 80, and a check valve 90, as shown in FIG.

The cap main body 60 is a member that forms the outer shell of the cap 50 . The cap body 60 includes a substantially disk-shaped upper plate portion 61 arranged above the opening 21 of the inner container 20, as shown in FIG. A substantially central portion of the upper plate portion 61 is provided with a content pouring port 62 which has a substantially hollow cylindrical shape and is formed to extend upward. An outer wall portion 63 extending downward is provided at the edge of the upper plate portion 61 so as to cover at least the outside air introduction hole 13 of the outer container 10 from the outside in the radial direction. A mounting portion 64 that fits with the mounting portion 14 of the inner container 20 is provided on the inner surface of the outer wall portion 63 . The mounting portion 64 is configured by, for example, a protrusion extending in the circumferential direction.

A middle wall portion 65 extending downward is provided radially inwardly of the outer wall portion 63 of the upper plate portion 61 so as to cover the inner surface of the upper portion of the inner container 20 from the radially inner side. The outer wall portion 63 and the inner wall portion 65 are provided so as to sandwich the upper portions of the outer container 10 and the inner container 20 from the radially outer and inner sides. An inner wall portion 66 is provided radially inwardly of the inner wall portion 65 of the upper plate portion 61 and extends downward so as to have a substantially cylindrical shape. A radially inner space surrounded by the inner wall portion 66 constitutes a supply chamber S2 that supplies the contents stored in the storage space S1 to the spout 62 when the contents are poured. The supply chamber S2 is located below the outlet 62 and communicates with the outlet 62, and communicates with the accommodation space S1 via the inner plug 80 and the check valve 90. As shown in FIG.

An outside air introduction part 67 that communicates between the outside of the container body 2 and the outside air introduction hole 13 is provided in the vicinity of the edge on the top surface of the upper plate part 61 . As shown in FIG. 3 , the outside air introduction portion 67 includes a projecting portion 67a provided to extend upward from the upper surface of the upper plate portion 61, and an intake passage 67b provided to penetrate from the upper end of the projecting portion 67a substantially vertically toward the lower surface of the upper plate portion 61. An upper opening of the air intake path 67b functions as an air intake hole 67c for sucking outside air. A vent hole 67d having a diameter smaller than that of the air intake hole 67c is formed substantially in the center of the lower portion of the air intake passage 67b. A ventilation member 67e for ventilating outside air and an outside air introduction valve 67f provided below the ventilation member 67e are accommodated in the lower portion of the intake path 67b. The ventilation member 67e is an annular member having a hole 67g formed substantially in the central portion thereof. The diameter of the hole portion 67g is set smaller than the outer diameter of the valve body 67h. The outside air introduction valve 67f is manufactured using an elastomer or a soft synthetic resin such as low-density polyethylene, and includes a substantially disk-shaped valve body 67h. The valve body 67h is biased in a direction to close the hole 67g of the ventilation member 67e. When outside air is introduced into the outside air introduction valve 67f, the valve body 67h bends downward against the urging force to open the hole 67g of the ventilation member 67e. The outside air introduction valve 67f is provided so as to have a check valve structure that opens or closes the hole 67g of the ventilation member 67e. The outside air introduced from the air intake hole 67c passes through the air intake passage 67b, passes through the gap between the outer wall portion 63 of the cap body 60 and the outer peripheral surface of the mouth portion 3 of the outer container 10, is guided to the outside air introduction hole 13, and is introduced into the gap A through the outside air introduction hole 13.

The lid 70 is an upper lid that opens or closes the spout 62 . As shown in FIG. 2, the lid 70 includes a top plate portion 71 rotatably connected to the edge of the top plate portion 61 of the cap body 60 via a hinge 73, a first plug portion 72 projecting substantially vertically from the inner surface (back surface) of the top plate portion 71, and a second plug portion 74 projecting substantially vertically from the top plate portion 71. The top plate portion 71 is provided so that the inner surface faces the upper surface of the upper plate portion 61 and is in close contact with the lid 70 when the lid 70 is closed. The first plug part 72 is provided so as to be inserted into the spout 62 to block the spout 62 when the lid 70 is closed. The second plug portion 74 is provided so as to block the intake hole 67c of the outside air introducing portion 67 when the lid 70 is closed. The second plug portion 74 is a plug body that protrudes from the inner surface of the top plate portion 71 toward the air intake hole 67c, and functions as a closing portion for the air intake hole 67c.

<Structure of Second Plug>
Next, examples of the form of the second plug portion 74 will be described with reference to FIGS. 4 and 5. FIG.
The configuration of the second plug portion 74 in Embodiment 1 is roughly divided into two configurations: a configuration in which the second plug portion 74 covers the intake hole 67c (first to third configurations) as shown in FIG. 4, and a configuration in which a portion of the second plug portion 74 is inserted into the intake hole 67c to block the intake hole 67c (fourth to seventh configurations) as shown in FIG.

(1st to 3rd forms)
FIG. 4 shows an embodiment in which the second plug portion 74 covers and closes the intake hole 67c. A dashed line in the drawing indicates the position of the upper end of the projecting portion 67a.

As shown in FIG. 4(a), the second plug portion 741 of the first form is a hollow, substantially cylindrical plug having an opening 74a formed at the tip thereof. In the second plug portion 741 of the first embodiment, when the lid 70 is closed, the tip of the second plug portion 741 and the upper end of the protruding portion 67a come into contact with each other to cover the air intake hole 67c and its periphery, thereby closing the air intake hole 67c.
As shown in FIG. 4(b), the second plug portion 742 of the second form is a substantially columnar plug whose diameter is substantially the same as the outer diameter of the projecting portion 67a. In the second plug portion 742 of the second configuration, when the lid 70 is closed, the tip of the second plug portion 742 and the upper end of the projecting portion 67a abut to cover the intake hole 67c and its periphery, thereby closing the intake hole 67c.
As shown in FIG. 4(c), the second plug portion 743 of the third embodiment is a bottomed cylindrical plug having a shallow bottom and having a fitting recess 74b formed at the tip thereof into which the upper portion of the projecting portion 67a is fitted. The inner diameter of the fitting recess 74b is substantially the same as or slightly larger than the outer diameter of the projecting portion 67a so as to be detachably fitted to the upper portion of the projecting portion 67a. A peripheral wall portion 74 d rising from the bottom portion 74 c of the fitting recess 74 b is provided so as to extend in the axial direction of the second plug portion 743 . The fitting recess 74b covers the upper outer surface of the projecting portion 67a while extending downward beyond the position of the upper end of the projecting portion 67a when fitted with the projecting portion 67a. In the second plug portion 743 of the third embodiment, when the lid 70 is closed, when the fitting recess 74b of the second plug portion 743 and the upper portion of the projecting portion 67a are fitted together, the upper end of the projecting portion 67a contacts the bottom portion 74c of the fitting recess 74b, and the upper outer surface of the projecting portion 67a is covered by the peripheral wall portion 74d, thereby closing the intake hole 67c.

The second plug part 741 of the first form and the second plug part 742 of the second form need only be molded according to the outer shape of the protruding part 67a so as to cover the air intake hole 67c. In particular, since the second plug portion 741 of the first form has a hollow, substantially cylindrical shape, the amount of resin used is less than that of the second plug portion 742 of the second form, and the manufacturing cost is lower.
In the second plug portion 743 of the third embodiment, the upper portion of the protruding portion 67a is covered with the bottom portion 74c and the peripheral wall portion 74d of the fitting recess 74b, so that the contact area between the second plug portion 743 and the protruding portion 67a is increased, thereby providing a structure that makes it difficult for cooling water to enter. Therefore, the cooling water infiltration suppression effect is higher than that of the second plug portion 741 of the first embodiment and the second plug portion 742 of the second embodiment.

In the second plug portion 743 of the third embodiment, when the lid 70 is opened and closed, the corners of the peripheral wall portion 74d of the fitting recess 74b of the second plug portion 743 and the corners of the upper end of the protruding portion 67a interfere with each other, which may hinder the opening and closing of the lid 70 and the closing of the intake hole 67c. Therefore, it is preferable to perform a chamfering process (for example, R chamfering or taper processing) on a portion where the fitting recess 74b of the second plug portion 743 and the protruding portion 67a can come into contact with each other. As a result, when the lid 70 is opened and closed, the fitting recess 74b of the second plug portion 743 and the projecting portion 67a do not interfere with each other, so that the opening and closing of the lid 70 and the closing of the intake hole 67c can be performed smoothly.

(4th to 7th forms)
FIG. 5 shows a form example in which a part of the second plug portion 74 is inserted into the intake hole 67c to close it. A dashed line in the drawing indicates the position of the upper end of the projecting portion 67a.

As shown in FIG. 5(a), the second plug portion 744 of the fourth form is a substantially columnar plug whose diameter is substantially the same as the diameter of the intake hole 67c. In the second plug portion 744 of the fourth embodiment, when the lid 70 is closed, the tip portion is inserted into the air intake hole 67c to close the air intake hole 67c.
As shown in FIG. 5(b), the second plug portion 745 of the fifth form is a substantially cylindrical plug whose diameter is substantially the same as the outer diameter of the projecting portion 67a. At the tip of the second plug portion 745, a substantially cylindrical projection 74e having substantially the same diameter as the intake hole 67c is provided. In the second plug portion 745 of the fifth embodiment, when the lid 70 is closed, the projection 74e is inserted into the air intake hole 67c, and the air intake hole 67c is closed in a state where the stepped portion around the projection 74e and the upper end of the projection 67a abut against each other.
As shown in FIG. 5(c), the second plug portion 746 of the sixth form is a substantially cylindrical plug whose diameter is substantially the same as the outer diameter of the projecting portion 67a. Also, the tip portion of the second plug portion 746 is formed in a substantially hemispherical shape. In the second plug portion 746 of the sixth embodiment, when the lid 70 is closed, the tip of the second plug portion 746 is partially inserted into the air intake hole 67c while being in contact with the edge of the air intake hole 67c, thereby closing the air intake hole 67c.
As shown in FIG. 5(d), the second plug portion 747 of the seventh embodiment is a substantially columnar plug whose diameter is substantially the same as the outer diameter of the projecting portion 67a. A second tapered surface 67i is provided on the inner peripheral edge of the upper portion of the protruding portion 67a to guide the insertion and removal of the second plug portion 747 into and out of the intake hole 67c and to contact the first tapered surface 74f when the second plug portion 747 is fitted. The second tapered surface 67i is provided on the inner peripheral edge of the upper portion of the projecting portion 67a, and gradually expands in diameter along the axial direction from the inner surface toward the outer edge of the projecting portion 67a. In the second plug portion 747 of the seventh embodiment, when the lid 70 is closed, a part of the distal end is inserted into the air intake hole 67c, and the air intake hole 67c is closed with the first tapered surface 74f and the second tapered surface 67i in contact with each other.

The second plug portion 744 of the fourth embodiment can be molded to match the diameter of the air intake hole 67c, and the second plug portion 746 of the sixth embodiment can be molded into a substantially hemispherical tip, so that the manufacturing cost can be reduced without requiring a complicated manufacturing process.
In the second plug portion 745 of the fifth embodiment, the protrusion 74e is inserted into the intake hole 67c, and the stepped portion around the protrusion 74e and the upper end of the protrusion 67a are in contact with each other to block the intake hole 67c. Therefore, the contact area between the second plug portion 745 and the protrusion 67a is increased, and the cooling water is less likely to enter. Therefore, the second plug portion 745 of the fifth form has a higher cooling water intrusion suppressing effect than the second plug part 744 of the fourth form, the second plug part 746 of the sixth form, and the second plug part 747 of the seventh form.
Since the second plug portion 747 of the seventh embodiment is fitted with the first tapered surface 74f and the second tapered surface 67i in contact with each other when the tip thereof is inserted into the intake hole 67c, the contact area between the second plug portion 747 and the protruding portion 67a is increased, thereby providing a structure that makes it difficult for cooling water to enter. Therefore, the cooling water infiltration suppression effect is higher than that of the second plug portion 746 of the sixth embodiment. In addition, since the first taper surface 74f is formed on the second plug portion 747 and the second taper surface 67i is formed on the protruding portion 67a, when the lid 70 is opened and closed, the opening and closing operation of the lid 70 and the closing of the intake hole 67c can be performed smoothly without interference between the second plug portion 747 and the outside air introduction portion 67.

In the second plug portion 744 of the fourth configuration and the second plug portion 745 of the fifth configuration, when the lid 70 is opened and closed, the tip of the second plug portion 744 and the protruding portion 67a interfere with each other, which may hinder the opening and closing operation of the lid 70 and the closing of the intake hole 67c. Specifically, in the second plug portion 744 of the fourth form, the tip of the second plug portion 744 and the corner portion of the inner surface of the projecting portion 67a may interfere with each other when the lid 70 is opened and closed. In the fifth form of the second plug portion 745, the corners of the convex portion 74e and the corners of the inner surface of the projecting portion 67a may interfere with each other. Therefore, it is preferable to perform chamfering (for example, R chamfering or taper processing) on the corners of the tip of the second plug portion 744, the corners of the protrusion 74e, the corners of the inner surface of the protrusion 67a, etc., where the second plug 744 or the second plug 745 and the protrusion 67a may come into contact when the lid 70 is opened and closed. As a result, when the lid 70 is opened and closed, the second plug portion 744 or the second plug portion 745 does not interfere with the protruding portion 67a, enabling smooth opening and closing operations, and reliably closing the intake hole 67c.

As described above, in the cap 50 of the first embodiment, by providing the second plug portion 74 for closing the intake hole 67c of the outside air introduction portion 67 on the inner surface of the top plate portion 71 of the lid 70, the intake hole 67c can be closed while the lid 70 is closed. As a result, even if the gap A between the outer container 10 and the inner container 20 is decompressed and becomes a negative pressure state in the cooling process after the hot filling process, cooling water can be prevented from entering the gap A through the intake hole 67c.

When the air intake hole 67c is closed by the second plug portion 74, it is not necessary to airtightly close the air intake hole 67c with the second plug portion 74. It is sufficient that the closed state is maintained to the extent that water does not enter the gap A through the air intake hole 67c when the lid 70 is closed.

As shown in FIG. 2, the inner plug 80 is accommodated in the supply chamber S2, and regulates the amount of contents supplied from the accommodation space S1 to the supply chamber S2 when the contents are poured out. The inner plug 80 is formed to have a substantially annular shape, and a supply port 82 that communicates between the supply chamber S2 and the housing space S1 is formed in a substantially central portion. The check valve 90 is detachable from the middle plug 80. When the internal pressure of the inner container 20 rises as in a squeeze operation, the valve body 91 of the check valve 90 moves upward to open the supply port 82. After the squeeze operation, the valve body 91 is seated so that the supply port 82 is closed. That is, the peripheral portion of the supply port 82 of the inner plug 80 functions as the valve seat 81 of the check valve 90 .

As shown in FIG. 2, the check valve 90 is housed above the inner plug 80 inside the supply chamber S2, and opens or closes the supply port 82 of the inner plug 80 according to the squeeze operation when the contents are poured out. Check valve 90 is manufactured using a soft synthetic resin such as elastomer or low density polyethylene. The check valve 90 includes a valve body 91 formed to have a substantially disk shape. The valve body 91 is formed so that its outer diameter is larger than the inner diameter of the supply port 82 of the inner plug 80 . The valve body 91 has a connecting portion that connects a part of its outer peripheral portion and the base of the check valve 90 , and rotates around the connecting portion in accordance with the squeeze operation to open or close the supply port 82 .

In the multiple container 1 of Embodiment 1 described above, when the outer container 10 is pressed by a squeezing operation when the contents are poured out, the outer container 10 is deformed so as to contract. When the pressing force applied to the outer container 10 is transmitted to the inner container 20, the inner container 20 is also deformed so as to contract, and the internal pressure of the inner container 20 increases. When the internal pressure of the inner container 20 increases, the valve body 91 of the check valve 90 rotates upward away from the supply port 82 . As a result, in the multiple container 1, the contents stored in the storage space S1 begin to be poured out from the outlet 62 through the supply port 82. As shown in FIG.

When the pouring of the contents is completed and the pressing of the outer container 10 by the squeezing operation is released, the outer container 10 of the multi-layer container 1 begins to deform from the contracted state to restore its original shape before being pressed. When the outer container 10 begins to restore, the internal pressure of the inner container 20 begins to decrease. When the internal pressure of the inner container 20 decreases, the check valve 90 rotates downward so that the valve body 91 is in close contact with the upper surface of the inner plug 80 , closing the supply port 82 . As a result, in the multiple container 1, the supply of the contents contained in the containing space S1 to the supply chamber S2 is stopped, and the pouring of the contents from the pouring port 62 is stopped.

In the multiple container 1, when the inner container 20 contracts and the air gap A becomes negative pressure, the valve body 67h of the outside air introduction valve 67f rotates downward against the urging force so as to move away from the hole 67g of the ventilation member 67e, thereby opening the hole 67g. As a result, the intake hole 67c and the outside air introduction hole 13 are communicated with each other, and the outside air is introduced into the gap A. As shown in FIG. When the pressure in the gap A rises to the same level as the atmospheric pressure, the valve body 67h of the outside air introduction valve 67f rotates upward by the biasing force so as to come into close contact with the hole 67g of the ventilation member 67e, thereby closing the hole 67g. As a result, the communication between the intake hole 67c and the outside air introduction hole 13 is cut off, and the introduction of outside air into the gap A is stopped.

<Effect>
As described above, in the multiple container cap 50 according to the first embodiment, the upper plate portion 61 of the cap body 60 is provided with the intake hole 67c for introducing the outside air, and the cap 50 provided with the second plug portion 74 for closing the intake hole 67c is attached to the inner surface of the top plate portion 71 of the lid 70. When the lid 70 is closed, the intake hole 67c is closed by the second plug portion 74.

Therefore, even if the multiple container 1 is splashed with water or flooded while the space A is depressurized, the air intake hole 67c is blocked by the second plug portion 74 when the lid 70 is closed, so foreign matter such as water can be prevented from entering the space A through the air intake hole 67c. Therefore, in the multiple container 1 described above, even if the sprayed cooling water enters the cap main body 60 when transitioning to the cooling process after the hot filling process, the cooling water does not enter the outside air introduction part 67 because the intake hole 67c is closed by the second plug portion 74.

[Other embodiments]
A multiple container 1 according to Embodiment 2 will be described. In the description of the multiple container 1 according to the second embodiment, the description of the same configuration and operation as those of the multiple container 1 according to the first embodiment will be omitted because it will be redundant.

In the multiplex container 1 of Embodiment 1, the closing portion that closes the intake hole 67 c is the second plug portion 74 provided on the inner surface of the top plate portion 71 of the lid 70 . However, in the multiplex container 1, the closing portion may have a form that can close the intake hole 67c when the lid 70 is closed.

As shown in FIG. 6, in the multiple container 1 of Embodiment 2, the projecting portion 67a provided on the upper plate portion 61 of the cap body 60 is provided to extend upward to a position where it contacts the inner surface of the top plate portion 71 of the lid 70. In the multiple container 1 of Embodiment 2, when the lid 70 is closed, the upper end of the projecting portion 67a and the inner surface of the top plate portion 71 of the lid 70 come into contact. In the multiple container 1 of Embodiment 2, a surface portion (region) on the inner surface of the top plate portion 71 with which the upper end of the protruding portion 67 a abuts is set as the contact surface portion 75 . The contact surface portion 75 is set at a position where it contacts the upper end of the protruding portion 67a when the lid 70 is closed (for example, a surface portion separated by two chain double-dashed lines shown in FIGS. 6 and 7(a) and (b)).

FIG. 7 is a diagram showing a form example of the closing portion in the multiple container 1 of Embodiment 2. FIG. FIG. 7(a) shows a state in which the upper end of the projecting portion 67a and the contact surface portion 75 set on the inner surface of the top plate portion 71 are in contact with each other. As shown in FIG. 7A, in the multiple container 1 of Embodiment 2, when the lid 70 is closed, the upper end of the protruding portion 67a and the contact surface portion 75 set on the inner surface of the top plate portion 71 come into contact with each other, and the air intake hole 67c and its peripheral edge are covered, thereby closing the air intake hole 67c.
As shown in FIG. 7B, the multiple container 1 of Embodiment 2 has a contact surface portion 75 set on the inner surface of the top plate portion 71 and a fitting portion 76 provided along the outer periphery of the contact surface portion 75 and fitted to the upper end of the projecting portion 67a. The fitting portion 76 is an annular portion that protrudes from the inner surface of the top plate portion 71 toward the air intake hole 67c, and has an inner diameter that is substantially the same as or slightly larger than the outer diameter of the protrusion 67a so as to be detachably fitted to the upper portion of the protrusion 67a. When the fitting portion 76 is fitted with the projecting portion 67a, the fitting portion 76 fits with the upper portion of the projecting portion 67a and covers the upper outer surface of the projecting portion 67a.

Since the closing portion shown in FIG. 7(a) utilizes part of the inner surface of the top plate portion 71, a complicated molding process for closing the air intake hole 67c is not required and the manufacturing cost can be reduced. In addition, since the upper portion of the projecting portion 67a is covered with the contact surface portion 75 and the fitting portion 76 set on the inner surface of the top plate portion 71, the closed portion shown in FIG.

In addition, in the multiple container 1 of Embodiment 2, as shown in FIG. 7, the contact surface portion 75 is set to be a substantially flat surface on the inner surface of the top plate portion 71, but the present invention is not limited to this.
In the multiple container 1 of Embodiment 2, for example, when the contact surface portion 75 set on the inner surface of the top plate portion 71 has an inclined shape, the shape of the upper end of the protruding portion 67a may be formed so as to match the shape of the contact surface portion 75.

A multiple container 1 according to Embodiment 3 will be described. In Embodiments 1 and 2, the multiple container 1 is a delaminated bottle that stores contents such as liquid seasonings or liquid cosmetics and maintains the freshness of the contents. However, the multiple container 1 may be a heat-insulating bottle that has heat resistance applicable to the high-temperature filling process and maintains the temperature of the contents by obtaining a heat-insulating effect using the air layer of the gap A.

FIG. 8 is a diagram schematically showing a longitudinal section of a heat insulating PET bottle, which is the multiple container 1 of Embodiment 3. As shown in FIG. In the heat insulating bottle, the basic configurations of the outer container 10 and the inner container 20 are the same as those of the delaminated bottles according to Embodiments 1 and 2 described above.

As shown in FIG. 8, the heat insulating bottle, which is the multiple container 1 of the third embodiment, includes an outer container 10 that forms the outer shell of the container body 2 and an inner container 20 that is made of a thermoplastic resin and has a bottle shape. In the heat insulating bottle, the inner surface of the outer container 10 and the outer surface of the inner container 20 are laminated so as to be detachable. The heat insulating bottle forms a gap A between the outer container 10 and the inner container 20, and utilizes the heat insulating effect of the air layer in the gap A to keep the contents warm. The void A is formed by peeling the inner container 20 from the outer container 10 due to thermal contraction that occurs during the high-temperature filling process of the contents, for example. Moreover, in order to improve the heat resistance of the mouth portion 3, the mouth portion 3 may be thermally crystallized by heat treatment at the preform stage. As described above, even when an insulated bottle is used as the multiple container 1, cooling water may be sucked in from the outside air introduction hole 13 in the cooling process after high-temperature filling when the contents are filled at high temperature. Therefore, it is possible to prevent the volume of the air layer from being reduced and the heat insulation effect to be weakened due to the infiltration of the cooling water into the gap A, which is effective.

In each of the embodiments described above, the multiple container 1 is a double structure container in which the inner container 20 is separated from the outer container 10 to form a gap A, but it may be a container having a multiple structure of three or more layers. That is, in the multiple container 1, the outer container 10 and the inner container 20 are laminated adjacent to each other in a detachable manner, and a gap A is formed between the outer container 10 and the inner container 20 that have been separated. In this case, the multiple container 1 may have a structure in which, for example, a container having a content storage space S1 is provided inside the inner container 20, or a container different from the outer container 10 is provided further outside the outer container 10.

In each of the above-described embodiments, the lid 70 is connected to the cap main body 60 via the hinge 73, which is a so-called hinge cap. In such a configuration, since the lid 70 has the first plug portion 72 and the second plug portion 74, considering the interference between the respective plug portions, the spout 62, and the outside air introduction portion 67 when opening and closing, it is preferable that the lid 70 has a crimping type that can be attached and detached in the axial direction of the central axis Z.

[others]
In the above-described embodiment, the multiple container 1 corresponds to an example of the "multiple container" described in the claims. The container main body 2 corresponds to an example of the "container main body" described in the claims. The mouth 3 corresponds to an example of the "mouth" described in the claims. The outer container 10 corresponds to an example of the "outer container" described in the claims. The outside air introduction hole 13 corresponds to an example of the "outside air introduction hole" described in the claims. The inner container 20 corresponds to an example of the "inner container" described in the claims. The multiple container cap 50 corresponds to an example of the "multiple container cap" described in the claims. The cap main body 60 corresponds to an example of the "cap main body" described in the claims. The upper plate portion 61 corresponds to an example of the "upper plate portion" described in the claims. The protrusion 67a corresponds to an example of the "protrusion" described in the claims. The intake hole 67c corresponds to an example of the "intake hole" described in the claims. The outside air introduction valve 67f corresponds to an example of the "outside air introduction valve" described in the claims. The lid 70 corresponds to an example of the "lid" described in the claims. The top plate portion 71 corresponds to an example of the "top plate portion" described in the claims. The hinge 73 corresponds to an example of the "hinge" described in the claims. The second plug portion 74 (741 to 747), the contact surface portion 75, and the fitting portion 76 correspond to an example of the "closure portion" described in the claims. The contact surface portion 75 corresponds to an example of the "contact surface portion" described in the claims. The air gap A corresponds to an example of the "air gap" described in the claims.

The above-described embodiments can apply each other's techniques to each other including the modifications. The above-described embodiments do not limit the content of the present invention, and modifications can be made without departing from the scope of the claims.

The terms used in the above-described embodiments and claims should be interpreted as non-limiting terms. For example, the term "including" should be interpreted as "not limited to what is stated to include." The term "comprising" should be interpreted as "not limited to what is described as comprising". The term "having" should be interpreted as "not limited to what is described as having".

DESCRIPTION OF SYMBOLS 1... Multiple container 2... Container main body 3... Mouth part 4... Shoulder part 5... Body part 6... Bottom part 10... Outer container 11... Opening part 12... Support ring 13... Outside air introduction hole 14... Mounting part 20... Inner container 21... Opening part 50... Cap for multiple container (cap)
60... Cap body 61... Upper plate part 62... Outlet 63... Outer wall part 64... Mounting part 65... Inner wall part 66... Inner wall part 67... Outside air introduction part (67a... Projection part, 67b... Intake passage, 67c... Intake hole, 67d... Ventilation hole, 67e... Ventilation member, 67f... Outside air introduction valve, 67g... Hole, 67h... Valve body, 67i... Second tapered surface )
70 Lid 71 Top plate 72 First plug 73 Hinge 74 (741 to 747) Second plug (74 a Opening, 74 b Fitting recess, 74 c Bottom, 74 d Peripheral wall, 74 e Convex, 74 f First tapered surface)
75... Abutting surface part 76... Fitting part 80... Inner plug 81... Valve seat 82... Supply port 90... Check valve 91... Valve body A... Gap S1... Accommodating space S2... Supply chamber Z... Central axis

Claims (6)

A multi-container cap that is attached to the mouth of a container body, wherein an inner container containing contents and an outer container enclosing the inner container are detachably laminated, and the mouth of the container body is provided with an outside air introduction hole for introducing outside air between the inner container and the outer container,
a cap body provided with an intake hole for sucking the outside air and communicating with the outside air introduction hole in an upper plate portion provided with an outlet for the contents;
a lid that covers the cap main body and has a top plate portion provided so as to face the upper plate portion when closed;
including
The top plate portion is provided with a closing portion that closes the air intake hole when the lid is closed ,
The air intake hole is formed by a protruding portion protruding from the upper plate portion toward the top plate portion,
The closing part is a plug provided to protrude from the inner surface of the top plate part toward the intake hole,
The stopper includes a bottom portion that abuts on the upper end of the projecting portion when the lid is closed, and a peripheral wall portion that covers the upper outer surface of the projecting portion when the lid is closed, the bottom portion and the peripheral wall portion closing the intake hole,
Chamfering is applied to an upper corner portion of the protrusion and a tip corner portion of the peripheral wall portion of the plug body, which are capable of coming into contact with each other.
Cap for multiple containers. A multi-container cap that is attached to the mouth of a container body, wherein an inner container containing contents and an outer container enclosing the inner container are detachably laminated, and the mouth of the container body is provided with an outside air introduction hole for introducing outside air between the inner container and the outer container,
a cap body provided with an intake hole for sucking the outside air and communicating with the outside air introduction hole in an upper plate portion provided with an outlet for the contents;
a lid that covers the cap main body and has a top plate portion provided so as to face the upper plate portion when closed;
including
The top plate portion is provided with a closing portion that closes the air intake hole when the lid is closed,
The air intake hole is formed by a protruding portion protruding from the upper plate portion toward the top plate portion,
The closing part is a plug provided to protrude from the inner surface of the top plate part toward the intake hole,
the plug closes the air intake hole with a part thereof being inserted into the air intake hole when the lid is closed;
Chamfering is applied to the upper corners of the protrusion and the tip corners of the plug, which can come into contact with each other.
Cap for multiple containers. an outside air introduction valve that opens communication between the intake hole and the outside air introduction hole when the outside air is introduced between the inner container and the outer container, and blocks communication between the intake hole and the outside air introduction hole after the outside air is introduced between the inner container and the outer container;
A cap for multiple containers according to claim 1 or 2 . the lid is rotatably connected to the cap body via a hinge;
The intake hole is provided between the spout and the hinge,
A cap for multiple containers according to any one of claims 1 to 3 . When the outer container is pressed by the squeezing operation, the outer container bends and deforms inward, and when the pressing is released by stopping the squeezing operation, the outer container returns to its original shape before being pressed,
When the contents are poured out by squeezing the outer container, the inner container contracts as the contents decrease.
A cap for multiple containers according to any one of claims 1 to 4 . A gap is formed by introducing the outside air between the inner container and the outer container,
When the cap for multiple containers is attached to the mouth of the container body and the lid is closed, the closing part closes the air intake hole, and the gap functions as an air layer for heat insulation of the contents.
A cap for multiple containers according to any one of claims 1 to 5 .