JP2020147293A - Cap for multiple container - Google Patents

Abstract

To provide a cap for a multiple container which prevents cooling water sprayed in a cooling process after a high temperature charging process from infiltrating into a gap between an outer container and an inner container.SOLUTION: A cap 50 for a multiple container is mounted at a mouth part 3 of a container body 2 comprising an outside air introduction hole 13 for introducing outside air between an inner container 20 and an outer container 10 at the mouth part 3, in which the inner container 20 housing a content, and the outside container 10 enclosing the inner container 20 are releasably laminated. The cap for the multiple container includes: a cap body 60 in which an intake hole 67c sucking outside air and communicating with the outside air introduction hole 13 is prepared in an upper plate part 61 comprising a spout 62 for the content; and a lid 70 comprising a top plate part 71 which is overlaid on the cap body 60, and provided so as to face the upper plate part 61 when closed. In the top plate part 71, a second plug part 74 which functions as a closing part for closing the intake hole 67c is formed when the lid 70 is closed.SELECTED DRAWING: Figure 2

Description

The present invention relates to a cap for a multiple container that is attached to the mouth of the multiple container.

As a container for containing contents such as liquid seasonings or liquid cosmetics and maintaining the freshness thereof, a multiple container called a derami bottle, an airless bottle, a laminated peeling container, or the like is known.

As a filling method for the contents in a multiple container, there is a normal temperature filling method in which the contents are filled at room temperature, and a high temperature filling method in which high temperature contents heated to a predetermined temperature higher than normal temperature are filled. In the high-temperature filling method, after the container after blow molding is filled with high-temperature contents by the high-temperature filling process, cooling water is sprayed over the entire container in a sealed state with a cap attached to cool the contents to room temperature. The process is carried out.

However, in the conventional multiple container, 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 heat shrinkage, the space inside the cap, etc. become decompressed, and the inside of the cap becomes decompressed. There is a problem that the cooling water easily infiltrates. In the following Patent Document 1, in order to solve the above problem, a plurality of ventilation grooves for ventilating the space between the cap body and the upper lid with the outside air are formed to facilitate the discharge of the cooling water that has entered the inside of the cap.

JP-A-2017-214048

However, in the cap disclosed in Patent Document 1, when the inner container is thermally shrunk due to high temperature filling and the gap between the outer container and the inner container becomes negative pressure, the cooling water that has penetrated into the cap is provided on the cap. There is a risk of being sucked through the intake hole. 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 enters, it may have to be disposed of as a defective product.

The present invention has been made in view of the above circumstances, and an example of the problem is to solve the above-mentioned problems. That is, one example of the subject of the present invention is to provide a cap for a multiple container that can prevent cooling water from entering the gap between the inner container and the outer container during high temperature filling.

In the multi-container cap according to the present invention, the inner container for accommodating the contents and the outer container containing the inner container are laminated so as to be peelable, and outside air is introduced between the inner container and the outer container. In a multi-container cap attached to the mouth of a container body provided with an outside air introduction hole for the purpose, an intake hole that takes in the outside air and communicates with the outside air introduction hole serves as an outlet for the contents. The top plate portion includes a cap body provided on the upper plate portion provided, and a lid provided on the cap body and provided so as to face the top plate portion when closed. , A closing portion that closes the intake hole when the lid is closed is provided.

Preferably, in the cap for the multiple container, the closing portion is a plug provided so as to project from the inner surface of the top plate portion toward the intake hole.

Preferably, in the cap for the multiple container, the plug body is closed so as to cover the intake hole when the lid is closed.

Preferably, in the cap for the multiple container, the plug closes the intake hole with a part thereof inserted into the intake hole when the lid is closed.

Preferably, in the multi-container cap, the intake hole is formed by a protruding portion provided so as to project from the upper plate portion toward the top plate portion, and the closing portion is formed on the inner surface of the top plate portion. It is a contact surface portion set on the surface portion where the upper end of the protrusion is abutted, and when the lid is closed, the contact surface portion closes the intake hole so as to cover the intake hole.

Preferably, the cap for the multiple container opens the 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 the inner container and the outer container are described. After the outside air is introduced between the outer container and the outer container, an outside air introduction valve that shuts off the communication between the intake hole and the outside air introduction hole is provided.

Preferably, in the cap for multiple containers, 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 cap for multiple containers, the outer container bends inward and deforms when pressed by the squeeze operation, and is restored to the original shape before pressing when the pressure is released by stopping the squeeze operation. When the contents are poured out by the squeeze operation of the outer container, the inner container shrinks as the contents decrease.

Preferably, in the cap for multiple containers, a gap is formed by introducing the outside air between the inner container and the outer container, and the gap functions as an air layer for heat insulation of the contents. To do.

In the multi-container cap according to the present invention, when the lid is closed, the intake hole of the outside air introduction portion provided on the upper plate portion of the cap is closed, so that a gap formed between the outer container and the inner container is formed. However, it is possible to prevent water or the like from entering from the outside.

It is a figure which shows typically the vertical cross section of the container body of the multi-container which concerns on Embodiment 1. FIG. It is a figure which shows typically the vertical cross section of the cap for multiple containers which concerns on Embodiment 1. FIG. It is a figure which shows the K part shown in FIG. 2 in an enlarged manner. FIGS. (A) to (C) are views showing a state in which the second plug portion covers and closes the intake hole of the outside air introduction portion when the lid is closed. FIGS. (A) to (D) are views showing a state in which a part of the second plug portion is inserted into the intake hole of the outside air introduction portion to be closed when the lid is closed. It is a figure which shows typically the vertical cross section of the cap for multiple containers which concerns on Embodiment 2. FIG. (A) and (b) are diagrams showing a morphological example of the closed portion of the multiple container according to the second embodiment. It is a figure which shows typically the vertical cross section of the heat insulating bottle which is a multi-container of Embodiment 3.

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 multiple container 1 having a bottle shape is also referred to as "axial direction", and the direction of orbiting around the central axis Z of the multiple container 1 as the rotation axis is also referred to as "circumferential direction". The direction orthogonal to the central axis Z of the multilayer container 1 is also referred to as a "diametrical direction". Further, in the present embodiment, the axial direction from the mouth 3 to the bottom 6 of the multiple container 1 is also referred to as "downward", and the axial direction from the bottom 6 to the mouth 3 of the multiple container 1 is also referred to as "upward". Further, in the present embodiment, a cross section obtained by cutting the multiple container 1 on a plane along the central axis Z of the multiple container 1 is also referred to as a “vertical cross section”, and the multiple container 1 is cut on a plane orthogonal to the central axis of the multiple container 1. The cross section is also referred to as a "cross section".

[Embodiment 1]
<Structure of multiple containers>
FIG. 1 is a diagram schematically showing a vertical cross section of a container body 2 of the multiple container 1 according to the first embodiment. 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, as in the state after the contents are filled.

The multiple container 1 is a container having a bottle shape. The multiple container 1 includes a container body 2 having a multi-layered structure for accommodating the contents and a cap 50 for the multi-container attached to the mouth 3 of the container body 2 (hereinafter, also simply referred to as “cap 50”, see FIG. 2). To be equipped.

As shown in FIG. 1, the container body 2 has a diameter of one end of the container body 2 and a mouth portion 3 from which the contents are poured, and a bottom portion 6 which is the other end of the container body 2 and has a ground contact surface. A shoulder portion 4 extending downward from the mouth portion 3 while spreading outward in the direction, and a body portion 5 extending downward from the shoulder portion 4 and connecting to the bottom portion 6 are provided.

The container body 2 includes an outer container 10 that constitutes the outer shell of the container body 2 and contains the inner container 20, and an inner container 20 that has a storage space S1 for accommodating the contents and can be shrunk as the contents decrease. Be prepared. 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 detachably laminated.

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

The outer container 10 and the inner container 20 are a polyolefin resin, an ethylene-vinyl copolymer, a styrene resin, a vinyl resin, a polyamide resin, a polyester resin, a polycarbonate resin, a polyphenylene oxide resin, or a raw material. Manufactured using degradable resin. Preferably, the outer container 10 and the inner container 20 are manufactured using a polyolefin-based resin or a polyester-based resin. More preferably, the outer container 10 and the inner container 20 are manufactured using a polyester resin. Examples of this polyester-based resin include resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and copolymerized polyesters 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 in contact with the ground and is self-supporting. The outer container 10 is formed so as to maintain the shapes of the mouth portion 3, the shoulder portion 4, the body portion 5, and the bottom portion 6 in a state of being independent and in an upright posture. The shoulder portion 4 and the body portion 5 of the outer container 10 are formed so as to bend and deform inward when pressed by a squeeze operation, and to be restored to the original shape before pressing when the pressing is released.

The mouth portion 3 of the outer container 10 is formed so as to have a higher rigidity than the body portion 5 of the outer container 10. An opening 11 into which the mouth 3 of the inner container 20 is inserted is provided at the upper end of the mouth 3 of the outer container 10. The inner diameter of the opening 11 of the outer container 10 is formed to be larger than the outer diameter of the opening 21 described later provided in the mouth 3 of the inner container 20. In a state where the inner container 20 is housed 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 brim shape that protrudes outward in the radial direction along the circumferential direction, and abuts on 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 project outward in the radial direction and extend in the circumferential direction. An outside air introduction hole 13 for introducing outside air into the gap A between the outer container 10 and the inner container 20 is provided between the opening 11 of the outer container 10 and the support ring 12. As shown in FIG. 1, the outside air introduction hole 13 is formed so as to penetrate the inner surface of the outer container 10 from the groove bottom of the mounted portion 14 to be described later, and is provided so as to communicate with the void A. The void A is formed between the shoulder 4 to the bottom 6 of the outer container 10 and the shoulder 4 to the bottom 6 of the inner container 20 by peeling the inner container 20 from the outer container 10, and is formed through the outside air introduction hole 13. It is a space where an air layer is formed by the introduced outside air.

A mounted portion 14 to which the cap 50 is mounted is provided between the opening 11 of the outer container 10 and the support ring 12. The mounted portion 14 is composed of a concave groove formed along the circumferential direction so that the mounted portion 14 can be mounted by a plug type. Alternatively, the mounted portion 14 may be formed by a spiral thread or a thread groove so that the cap 50 can be screwed and mounted.

The inner container 20 has a storage space S1 for accommodating the contents, and is formed so as 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 wall 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 so as to have a 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 3 of the inner container 20 is provided with an opening 21 at the upper end thereof for communicating the inner container 20 and the cap 50. The edge portion of the opening 21 is formed in a brim shape that protrudes outward in the radial direction along the circumferential direction, and abuts on the edge portion 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 so 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 void A is formed.

As an example of the method of peeling the inner container 20 from the outer container 10, the peeling is promoted by heat-shrinking the inner container 20 by a high-temperature filling step. Further, since the container body 2 is filled with high-temperature contents in the high-temperature filling step, the mouth portion 3 may be heat-treated and thermally crystallized at 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 (whether a hot beverage or a cold beverage), a liquid seasoning, or the like.

<Cap configuration>
FIG. 2 is a diagram schematically showing a vertical cross section of the cap 50 of the multiple container 1 according to the first embodiment. FIG. 3 is an enlarged view of the K portion shown in FIG.

The cap 50 is a cap for pouring out the contents stored in the storage space S1 of the multiple container 1 to the outside of the multiple container 1 by a squeeze operation. As shown in FIG. 2, the cap 50 includes a cap body 60, a lid 70, an inner plug 80, and a check valve 90.

The cap body 60 is a member that constitutes the outer shell of the cap 50. As shown in FIG. 2, the cap body 60 includes a substantially disk-shaped upper plate portion 61 arranged above the opening 21 of the inner container 20. At the substantially central portion of the upper plate portion 61, a pouring outlet 62 for contents having a hollow substantially cylindrical shape and extending upward is provided. An outer wall portion 63 extending downward is provided on the edge portion 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. On the inner surface of the outer wall portion 63, a mounting portion 64 that fits with the mounted portion 14 of the inner container 20 is provided. The mounting portion 64 is composed of, for example, ridges extending in the circumferential direction.

A middle wall portion 65 extending downward from 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 in the radial direction is provided. 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 outside and the inside in the radial direction between the two. An inner wall portion 66 extending downward so as to have a substantially cylindrical shape is provided inward in the radial direction from the middle wall portion 65 of the upper plate portion 61. The radial inner space surrounded by the inner wall portion 66 constitutes a supply chamber S2 that supplies the contents contained in the accommodation space S1 to the injection port 62 when the contents are poured out. The supply chamber S2 is located below the spout 62 and communicates with the spout 62, and also communicates with the accommodation space S1 via the inner plug 80 and the check valve 90.

An outside air introduction portion 67 that communicates between the outside of the container body 2 and the outside air introduction hole 13 is provided near the edge portion on the upper surface of the upper plate portion 61. As shown in FIG. 3, the outside air introduction portion 67 includes a protruding portion 67a provided so as to extend upward from the upper surface of the upper plate portion 61, and a protruding portion 67a inside the protruding portion 67a from the upper end to the upper plate portion 61. It is provided with an intake passage 67b provided so as to penetrate substantially vertically toward the lower surface of the. The upper opening of the intake passage 67b functions as an intake hole 67c for taking in outside air. In the lower part of the intake passage 67b, a ventilation hole 67d having a diameter smaller than that of the intake hole 67c is formed in a substantially central portion. A ventilation member 67e for ventilating the outside air and an outside air introduction valve 67f provided below the ventilation member 67e are housed in the lower portion of the intake passage 67b. The ventilation member 67e is an annular member in which a hole portion 67g is formed in a substantially central portion. The diameter of the hole 67g is set smaller than the outer diameter of the valve body 67h. The outside air introduction valve 67f is manufactured using a soft synthetic resin such as an elastomer or low density polyethylene, and includes a substantially disk-shaped valve body 67h. The valve body 67h is urged in a direction of closing the hole 67g of the ventilation member 67e. In the outside air introduction valve 67f, when the outside air is introduced, the valve body 67h bends downward against the urging force to open the hole 67g of the ventilation member 67e, and after the outside air is introduced, The valve body 67h rotates in the direction of closing the hole 67g of the ventilation member 67e by the urging force. 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 intake hole 67c passes through the intake passage 67b and is guided to the outside air introduction hole 13 while passing 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. , It is introduced into the void 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 has a top plate portion 71 rotatably connected to the edge portion of the upper plate portion 61 of the cap body 60 via a hinge 73, and an inner surface (back surface) of the top plate portion 71. ), The first plug portion 72 protruding substantially vertically from the top plate portion 71, and the second plug portion 74 protruding substantially vertically from the top plate portion 71. The top plate portion 71 is provided so that the inner surface thereof faces the upper surface of the upper plate portion 61 and comes into close contact with the lid 70 when the lid 70 is closed. The first plug portion 72 is provided so as to be inserted into the spout 62 and close the spout 62 when the lid 70 is closed. The second plug portion 74 is provided so as to close the intake hole 67c of the outside air introduction portion 67 when the lid 70 is closed. The second plug portion 74 is a plug body provided so as to project from the inner surface of the top plate portion 71 toward the intake hole 67c, and functions as a closing portion of the intake hole 67c.

<Structure of the second plug>
Next, a morphological example of the second plug portion 74 will be described with reference to FIGS. 4 and 5.
The second plug portion 74 in the first embodiment has a second plug portion 74 covering the intake hole 67c (first to third forms) as shown in FIG. 4, and a second plug portion 74 as shown in FIG. 2 There are roughly two forms (fourth to seventh forms) in which a part of the plug portion 74 is inserted into the intake hole 67c to close the intake hole 67c.

(1st to 3rd forms)
FIG. 4 shows an example in which the second plug portion 74 covers and closes the intake hole 67c. The alternate long and short dash line in the figure indicates the position of the upper end of the protrusion 67a.

As shown in FIG. 4A, the second plug portion 741 of the first form is a hollow substantially cylindrical plug body having an opening 74a formed at the tip thereof, and the inner diameter thereof is the diameter of the intake hole 67c. It is substantially the same, and the outer diameter is set to be substantially the same as the outer diameter of the protruding portion 67a. In the second plug portion 741 of the first form, 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 intake hole 67c and its peripheral edge, thereby covering the intake hole 67c. Is blocked.
As shown in FIG. 4B, 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 protruding portion 67a. In the second plug portion 742 of the second form, when the lid 70 is closed, the tip of the second plug portion 742 and the upper end of the protruding portion 67a come into contact with each other to cover the intake hole 67c and its peripheral edge, thereby covering the intake hole 67c. Is blocked.
As shown in FIG. 4C, the second plug portion 743 of the third form has a shallow bottomed tubular shape in which a fitting recess 74b in which the upper portion of the protruding portion 67a is fitted is formed at the tip thereof. It is a plug body. The inner diameter of the fitting recess 74b is substantially the same as or slightly increased from the outer diameter of the protruding portion 67a so that the fitting recess 74b can be detachably fitted to the upper portion of the protruding portion 67a. Further, the peripheral wall portion 74d rising from the bottom portion 74c of the fitting recess 74b is provided so as to extend in the axial direction of the second plug portion 743. When the fitting recess 74b is fitted with the protrusion 67a, the fitting recess 74b covers the upper outer surface of the protrusion 67a in a state of extending downward from the position of the upper end of the protrusion 67a. In the second plug portion 743 of the third form, when the lid 70 is closed, when the fitting recess 74b of the second plug portion 743 and the upper portion of the protruding portion 67a are fitted, they are fitted with the upper end of the protruding portion 67a. The intake hole 67c is closed by contacting the bottom portion 74c of the recess 74b and covering the upper outer surface of the protrusion 67a with the peripheral wall portion 74d.

Since the second plug portion 741 of the first form and the second plug portion 742 of the second form may be molded according to the outer shape of the protruding portion 67a so as to cover the intake hole 67c, a complicated molding process is required. The manufacturing cost is low. In particular, since the second plug portion 741 of the first form has a hollow substantially cylindrical shape, the amount of resin used is smaller than that of the second plug portion 742 of the second form, and the manufacturing cost is further reduced.
In the second plug portion 743 of the third form, since 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, the contact area between the second plug portion 743 and the protruding portion 67a becomes large. , The structure is such that cooling water does not easily enter. Therefore, the effect of suppressing the infiltration of cooling water is higher than that of the second plug portion 741 of the first form and the second plug portion 742 of the second form.

In the second plug portion 743 of the third form, when the lid 70 is opened and closed, the corner portion of the peripheral wall portion 74d in the fitting recess 74b of the second plug portion 743 and the corner portion of the upper end of the protruding portion 67a are formed. There is a risk of interference that hinders the opening / closing operation of the lid 70 and the closure of the intake hole 67c. Therefore, it is preferable to perform chamfering treatment (for example, R chamfering, tapering) 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 lid 70 can be opened and closed and the intake hole 67c can be smoothly closed without the fitting recess 74b of the second plug portion 743 and the protruding portion 67a interfering with each other.

(4th to 7th forms)
FIG. 5 shows an example in which a part of the second plug portion 74 is inserted into the intake hole 67c to close the second plug portion 74. The alternate long and short dash line in the figure indicates the position of the upper end of the protrusion 67a.

As shown in FIG. 5A, 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 form, when the lid 70 is closed, the intake hole 67c is closed by inserting the tip portion into the intake hole 67c.
As shown in FIG. 5B, the second plug portion 745 of the fifth form is a substantially columnar plug body whose diameter is substantially the same as the outer diameter of the protruding portion 67a. Further, a substantially cylindrical convex portion 74e having substantially the same diameter as the diameter of the intake hole 67c is provided at the tip of the second plug portion 745. In the second plug portion 745 of the fifth form, when the lid 70 is closed, the convex portion 74e is inserted into the intake hole 67c, and the step portion around the convex portion 74e and the upper end of the protruding portion 67a are in contact with each other. In this state, the intake hole 67c is closed.
As shown in FIG. 5 (c), the second plug portion 746 of the sixth form is a substantially columnar plug body whose diameter is substantially the same as the outer diameter of the protruding portion 67a. Further, the tip portion of the second plug portion 746 is formed into a substantially hemispherical shape. In the second plug portion 746 of the sixth form, when the lid 70 is closed, a part of the tip is inserted into the intake hole 67c with the tip in contact with the edge of the intake hole 67c, so that the intake hole 67c Is blocked.
As shown in FIG. 5D, the diameter of the second plug portion 747 of the seventh form is substantially the same as the outer diameter of the protruding portion 67a, and the peripheral edge of the tip gradually shrinks toward the tip. It is a substantially columnar plug body provided with a first tapered surface 74f having a diameter. Further, on the inner peripheral edge of the upper portion of the protruding portion 67a, the insertion and detachment of the second plug portion 747 with respect to the intake hole 67c is guided, and when the second plug portion 747 is fitted, the first tapered surface 74f is contacted. A second tapered surface 67i in contact is provided. The second tapered surface 67i is provided on the inner peripheral edge of the upper portion of the protruding portion 67a, and gradually expands in diameter along the axial direction from the inner surface toward the outer edge of the protruding portion 67a. In the second plug portion 747 of the seventh form, when the lid 70 is closed, a part of the tip is inserted into the intake hole 67c, and the first tapered surface 74f and the second tapered surface 67i are in contact with each other. The intake hole 67c is closed.

The second plug portion 744 of the fourth form may be formed according to the diameter of the intake hole 67c, and the second plug portion 746 of the sixth form may be formed with a substantially hemispherical tip, which is complicated. The manufacturing cost is low without the need for a manufacturing process.
In the second plug portion 745 of the fifth form, the convex portion 74e is inserted into the intake hole 67c, and the intake hole 67c is closed in a state where the step portion around the convex portion 74e and the upper end of the protruding portion 67a are in contact with each other. The contact area between the second plug portion 745 and the protruding portion 67a becomes large, and the structure is such that cooling water does not easily enter. Therefore, the second plug portion 745 of the fifth form suppresses the infiltration of cooling water as compared with 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. The effect is high.
The second plug portion 747 of the seventh form is fitted in a state where the first tapered surface 74f and the second tapered surface 67i are in contact with each other when the tip is inserted into the intake hole 67c, so that the second plug portion 747 is fitted. The contact area between the 747 and the protruding portion 67a becomes large, so that the cooling water does not easily enter the structure. Therefore, the effect of suppressing the infiltration of cooling water is higher than that of the second plug portion 746 of the sixth form. Further, since the first tapered surface 74f is formed on the second plug portion 747 and the second tapered surface 67i is formed on the protruding portion 67a, the second plug portion 747 and the outside air introduction portion 67 are formed when the lid 70 is opened and closed. Can smoothly open and close the lid 70 and close the intake hole 67c without interfering with the lid 70.

In the second plug portion 744 of the fourth form and the second plug portion 745 of the fifth form, 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 to form the lid 70. The opening / closing operation and the closing of the intake hole 67c may be hindered. Specifically, in the second plug portion 744 of the fourth form, the tip of the second plug portion 744 may interfere with the corner portion of the inner surface of the protruding portion 67a when the lid 70 is opened and closed. In the second plug portion 745 of the fifth form, the corner portion of the convex portion 74e and the corner portion of the inner surface of the protruding portion 67a may interfere with each other. Therefore, when the lid 70 is opened and closed, such as the corner of the tip of the second plug 744, the corner of the convex 74e, and the corner of the inner surface of the protrusion 67a, the second plug 744 or the second plug 745 and the protrusion It is preferable to perform a chamfering treatment (for example, R chamfering, tapering) on a portion where the 67a can come into contact with the 67a. As a result, when opening and closing the lid 70, the second plug portion 744 or the second plug portion 745 and the protruding portion 67a can be smoothly opened and closed without interfering with each other, and the intake hole 67c is reliably closed. be able to.

As described above, in the cap 50 of the first embodiment, the lid 70 is closed by providing the second plug portion 74 that closes 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. As a result, even if the gap A between the outer container 10 and the inner container 20 is depressurized and becomes a negative pressure state in the cooling step after the high-temperature filling step, the cooling water can enter the gap A through the intake hole 67c. Can be prevented.

When the intake hole 67c is closed by the second plug 74, it is not always necessary to airtightly close the intake hole 67c by the second plug 74, and when the lid 70 is closed, the intake hole 67c is inserted into the gap A. It suffices if the closed state is maintained so that water does not enter.

As shown in FIG. 2, the inner plug 80 is housed in the supply chamber S2, and when the contents are poured out, the amount of the contents supplied from the storage space S1 to the supply chamber S2 is regulated. The inner plug 80 is formed so as to have a substantially annular shape, and a supply port 82 that communicates the supply chamber S2 and the accommodation space S1 is formed in a substantially central portion. The check valve 90 is provided in the inner plug 80 so that the check valve 90 can be taken off and seated, and when the internal pressure of the inner container 20 rises as in the squeeze operation, the valve body 91 of the check valve 90 moves upward to supply the inner plug 80. The valve body 91 is seated so that the port 82 is opened and the supply port 82 is closed after the squeeze operation. 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 in the supply chamber S2, and the supply port 82 of the inner plug 80 responds to a squeeze operation when the contents are poured out. Is opened or closed. The 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 so as 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 includes a connecting portion for connecting a part of the outer peripheral portion thereof and the base of the check valve 90, and rotates around the connecting portion in response to a squeeze operation to open or close the supply port 82.

Then, in the multiple container 1 of the above-described first embodiment, when the outer container 10 is pressed by the squeeze operation when the contents are poured out, the outer container 10 is deformed so as to contract. When the pressing force on 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 rises. When the internal pressure of the inner container 20 rises, the valve body 91 of the check valve 90 rotates upward so as to be separated 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 spout 62 through the supply port 82.

When the pouring of the contents is completed and the pressing of the outer container 10 by the squeeze operation is released, the multiple container 1 begins to be deformed so as to restore the outer container 10 from the contracted state to the original shape before pressing. When the outer container 10 begins to be restored, 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 comes into close contact with the upper surface of the inner plug 80, and closes the supply port 82. As a result, in the multiple container 1, the supply of the contents stored in the storage space S1 to the supply chamber S2 is stopped, and the pouring of the contents from the spout 62 is stopped.

Further, in the multiple container 1, when the inner container 20 contracts and the void A becomes a negative pressure state, the valve body 67h of the outside air introduction valve 67f is separated from the hole 67g of the ventilation member 67e against the urging force. Rotates downward to open the hole 67g. As a result, the intake hole 67c and the outside air introduction hole 13 communicate with each other to introduce the outside air into the gap A. 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 so as to be in close contact with the hole portion 67g of the ventilation member 67e by the urging force, and the hole portion 67g is formed. Block. As a result, the communication between the intake hole 67c and the outside air introduction hole 13 is cut off, and the introduction of the outside air into the void A is stopped.

<Action 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 an intake hole 67c for introducing outside air, and the inner surface of the top plate portion 71 of the lid 70 is provided with intake air. When the cap 50 provided with the second plug portion 74 for closing the hole 67c is attached and the lid 70 is closed, the intake hole 67c is closed by the second plug portion 74.

Therefore, even if the multilayer container 1 is splashed with water or flooded with the air gap A depressurized, the intake hole 67c is blocked by the second plug portion 74 if the lid 70 is closed. It is possible to prevent foreign matter such as water from entering the void A through the intake hole 67c. Therefore, in the above-mentioned multiple container 1, even if the cooling water sprayed when the process shifts to the cooling step after the high-temperature filling step enters the cap body 60, the intake hole 67c is blocked by the second plug portion 74. Therefore, the cooling water does not enter the outside air introduction unit 67.

[Other Embodiments]
The multiple container 1 according to the second embodiment will be described. In the description of the multiple container 1 according to the second embodiment, the description relating to the same configuration and operation as the multiple container 1 according to the first embodiment will be omitted because the description will be duplicated.

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

As shown in FIG. 6, in the multiple container 1 of the second embodiment, the protruding portion 67a provided on the upper plate portion 61 of the cap body 60 faces upward until it comes into contact with the inner surface of the top plate portion 71 of the lid 70. It is provided so as to extend. In the multiple container 1 of the second embodiment, when the lid 70 is closed, the upper end of the protruding portion 67a and the inner surface of the top plate portion 71 of the lid 70 come into contact with each other. In the multiple container 1 of the second embodiment, on the inner surface of the top plate portion 71, a surface portion (region) with which the upper end of the protruding portion 67a abuts is set as the abutting surface portion 75. The contact surface portion 75 is a surface portion separated by two alternate long and short dash lines shown in FIGS. 6 and 7 (a) and 7 (b) at positions where the contact surface portion 75 comes into contact with the upper end of the protruding portion 67a when the lid 70 is closed. ) Is set.

FIG. 7 is a diagram showing a morphological example of the closed portion in the multiple container 1 of the second embodiment. FIG. 7A shows a state in which 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 are in contact with each other. As shown in FIG. 7A, in the multiple container 1 of the second embodiment, 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 are formed. The intake hole 67c is closed by abutting and covering the intake hole 67c and its peripheral edge.
As shown in FIG. 7B, the multiple container 1 of the second embodiment has a contact surface portion 75 set on the inner surface of the top plate portion 71 and a protrusion portion 67a provided along the outer circumference of the contact surface portion 75. The fitting portion 76 fitted to the upper end of the is a closing portion. The fitting portion 76 is an annular portion provided so as to project from the inner surface of the top plate portion 71 toward the intake hole 67c, and its inner diameter is detachably fitted to the upper portion of the protruding portion 67a. In addition, the outer diameter of the protruding portion 67a is substantially the same as or slightly enlarged. When the fitting portion 76 is fitted with the protruding portion 67a, the fitting portion 76 fits with the upper portion of the protruding portion 67a and covers the upper outer surface of the protruding portion 67a.

Since the closed portion shown in FIG. 7A utilizes a part of the inner surface of the top plate portion 71, a complicated molding process for closing the intake hole 67c is not required, and the manufacturing cost can be reduced. Further, in the closed portion shown in FIG. 7B, the upper portion of the protruding 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, so that cooling water infiltrates. The structure is difficult, and the effect of suppressing the infiltration of cooling water is higher than that of the closed portion shown in FIG. 7A.

In the multiple container 1 of the second embodiment, the contact surface portion 75 has been described as being set to a substantially flat surface on the inner surface of the top plate portion 71 as shown in FIG. 7, but the present invention is not limited to this.
In the multiple container 1 of the second embodiment, 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 protrusion 67a is formed to match the shape of the contact surface portion 75. Just do it.

The multiple container 1 according to the third embodiment will be described. In the first and second embodiments, the multiple container 1 is a derami bottle that contains contents such as liquid seasonings or liquid cosmetics and retains their freshness. However, the multiple container 1 may be a heat insulating bottle that has heat resistance applicable to a high temperature filling step and maintains the temperature of the contents by obtaining a heat insulating effect by utilizing the air layer of the void A.

FIG. 8 is a diagram schematically showing a vertical cross section of the heat insulating PET bottle which is the multiple container 1 of the third embodiment. In the heat-insulated bottle, the basic configurations of the outer container 10 and the inner container 20 are the same as those of the derami bottles according to the above-described first and second embodiments. Therefore, the constituent requirements having the same functions will be described with the same reference numerals.

As shown in FIG. 8, the heat insulating bottle, which is the multiple container 1 of the third embodiment, is a bottle-shaped outer container 10 made of a thermoplastic resin, which contains the inner container 20 together with the outer container 10 constituting the outer shell of the container body 2. And an inner container 20 made of a thermoplastic resin having a storage space S1 for storing the contents and having a shape along the inner surface of the outer container 10. 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 peelable. In the heat insulating bottle, a gap A is formed between the outer container 10 and the inner container 20, and the contents are kept warm by utilizing the heat insulating effect of the air layer in the gap A. The void A is formed by peeling the inner container 20 from the outer container 10 due to heat shrinkage that occurs, for example, during the high temperature filling step of the contents. Further, in order to increase the heat resistance of the mouth portion 3, the mouth portion 3 may be heat-treated and thermally crystallized at the preform stage. As described above, even when the heat insulating bottle is used as the multiple container 1, there is a possibility that the cooling water in the cooling step after the high temperature filling may be sucked from the outside air introduction hole 13 when the contents are filled at a high temperature. By attaching the cap 50, it is possible to prevent the suction of cooling water. Therefore, it is effective because it is possible to prevent the volume of the air layer from being reduced and the heat insulating effect from being weakened due to the infiltration of the cooling water into the void A.

Further, in each of the above-described forms, the multiple container 1 is a container having a double structure in which the inner container 20 is peeled from the outer container 10 to form a void A, but is a container having a triple or more multiple structure. Good. That is, in the multiple container 1, the outer container 10 and the inner container 20 are laminated so as to be peelable adjacent to each other, and a gap A is formed between the peeled outer container 10 and the inner container 20 as a laminated body. It just works. In this case, in the multiple container 1, 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. It may have a structure such as a container.

Further, in each of the above-described forms, the lid 70 has been described as a so-called hinge cap in which the lid 70 is connected to the cap body 60 via the hinge 73, but the present invention is not limited to this, and the lid 70 is removable from the cap body 60. It may be in the form. In such a form, since the lid 70 includes the first plug portion 72 and the second plug portion 74, consideration is given to the interference between each plug portion, the spout 62, and the outside air introduction portion 67 when opening and closing. As the form of the lid 70, a crimping type that is removable in the axial direction of the central axis Z is preferable.

[Other]
In the above-described embodiment, the multiple container 1 corresponds to an example of the “multiple container” described in the claims. The container body 2 corresponds to an example of the “container body” described in the claims. The mouth portion 3 corresponds to an example of the “mouth portion” 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 cap 50 for multiple containers corresponds to an example of the "cap for multiple containers" described in the claims. The cap body 60 corresponds to an example of the “cap body” described in the claims. The upper plate portion 61 corresponds to an example of the “upper plate portion” described in the claims. The protruding portion 67a corresponds to an example of the “protruding portion” 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 “closed portion” described in the claims. The contact surface portion 75 corresponds to an example of the “contact surface portion” described in the claims. The void A corresponds to an example of the "void" described in the claims.

In the above-described embodiments, the techniques can be applied to each other, including modifications. The above-described embodiment does not limit the content of the present invention, and changes can be made without departing from the scope of claims.

The terms used in the above embodiments and claims should be construed as non-limiting terms. For example, the term "contains" should be construed as "not limited to what is described as including." The term "prepared" should be construed as "not limited to what is described as prepared." The term "have" should be construed as "not limited to what is described as having."

1 ... Multiple container 2 ... Container body 3 ... Mouth 4 ... Shoulder 5 ... Body 6 ... Bottom 10 ... Outer container 11 ... Opening 12 ... Support ring 13 ... Outside air introduction hole 14 ... Attached part 20 ... Inner container 21 … Opening 50… Cap for multiple containers (cap)
60 ... Cap body 61 ... Top plate 62 ... Outlet 63 ... Outer wall 64 ... Mounting 65 ... Middle wall 66 ... Inner wall 67 ... Outside air introduction (67a ... Protruding, 67b ... Intake path, 67c ... Intake hole , 67d ... Vent 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 (741-747) ... second plug (74a ... opening, 74b ... fitting recess, 74c ... bottom, 74d ... peripheral wall, 74e ... Convex part, 74f ... 1st tapered surface)
75 ... Contact surface part 76 ... Fitting part 80 ... Inner plug 81 ... Valve seat 82 ... Supply port 90 ... Check valve 91 ... Valve body A ... Void S1 ... Containment space S2 ... Supply chamber Z ... Central axis

Claims (9)

The inner container for accommodating the contents and the outer container containing the inner container are detachably laminated, and an outside air introduction hole for introducing outside air is provided in the mouth between the inner container and the outer container. In the cap for multiple containers attached to the mouth of the container body,
An intake hole that takes in the outside air and communicates with the outside air introduction hole is provided in a cap body provided on an upper plate portion provided with an outlet for the contents.
A lid that covers the cap body and has a top plate portion that is 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 intake hole when the lid is closed.
Cap for multiple containers. The closed portion is a plug body provided so as to project from the inner surface of the top plate portion toward the intake hole.
The cap for multiple containers according to claim 1. The plug is closed so as to cover the intake hole when the lid is closed.
The cap for multiple containers according to claim 2. When the lid is closed, the plug body closes the intake hole with a part thereof inserted into the intake hole.
The cap for multiple containers according to claim 2. The intake hole is formed by a protruding portion provided so as to project from the upper plate portion toward the top plate portion.
The closed portion is a contact surface portion set on a surface portion on the inner surface of the top plate portion where the upper end of the protruding portion is abutted, and when the lid is closed, the contact surface portion covers the intake hole. To block,
The cap for multiple containers according to claim 1. When the outside air is introduced between the inner container and the outer container, the communication between the intake hole and the outside air introduction hole is opened, and the outside air is introduced between the inner container and the outer container. After that, an outside air introduction valve for blocking communication between the intake hole and the outside air introduction hole is provided.
The cap for multiple containers according to any one of claims 1 to 5. The lid is rotatably connected to the cap body via a hinge.
The intake hole is provided between the spout and the hinge.
The cap for a multiple container according to any one of claims 1 to 6. When pressed by the squeeze operation, the outer container bends inward and deforms, and when the pressure is released by stopping the squeeze operation, the outer container is restored to its original shape before pressing.
When the contents are poured out by the squeeze operation of the outer container, the inner container shrinks as the contents decrease.
The cap for multiple containers according to any one of claims 1 to 7. A gap is formed by introducing the outside air between the inner container and the outer container.
The voids function as an air layer for heat insulation of the contents.
The cap for a multiple container according to any one of claims 1 to 8.