JP2020001804A - Double container cap and method for manufacturing double container cap - Google Patents

Abstract

To provide a double container cap capable of suppressing spill of contents during use.SOLUTION: A double container cap 1 according to the present disclosure comprises: a cap body 10 that has a pouring hole 14a and is attached to a mouth peripheral wall 4a (mouth) of an outer layer body 4; and a cover body 50 that covers the pouring hole 14a. The cap body 10 comprises: an outside air introduction hole 16 that causes a space between an inner layer body 3 and the outer layer body 4 to communicate with the outside through a through hole 4c provided in the mouth peripheral wall 4a; and a protruding part 18 provided with an engaging part protruding upward. The cover body 50 is provided with a vent hole 52a in an upper wall 52, and covers the outside air introduction hole 16 during closing time. The vent hole 52a is closed by an engaging part engaging with the vent hole 52a during pre-opening time. When the lid body 50 is opened, the engagement is released to open the vent hole 52a. Then, when the lid body 50 is closed again after once opened, the engaging part presses a periphery of the vent hole 52a from below so as to maintain an open state of the vent hole 52a.SELECTED DRAWING: Figure 1

Description

  The present disclosure is directed to a double container including a deformable inner layer body and an outer layer body in which the inner layer body is disposed, and pours out the contents attached to the mouth of the outer layer body and accommodated in the inner layer body. The present invention relates to a double container cap to be made and a method for manufacturing the double container cap.

  Examples of containers for cosmetics such as lotions, shampoos, rinses, liquid soaps, and food seasonings include an inner layer body that accommodates such contents and is provided so as to be deformable with reduced volume; And an outer layer forming an outer shell of the container are known (for example, Patent Document 1). The double container includes a delamination container (laminated release container) formed by stacking an outer layer body and an inner layer body from the beginning, and a container of a type in which the outer layer body and the inner layer body are individually formed and assembled. The delamination container is formed by sandwiching a heated and melted laminated parison in a mold, and blowing air into the laminated parison to form a laminated container. The outer layer and the inner layer are formed by EBM (Extrusion Blow Molding). There is a method by biaxial stretch blow molding in which a laminated container is formed from a preform (container material) formed in a bottomed cylindrical shape provided. In such a double container, usually a cap for a double container provided with a pouring cylinder for pouring out contents at the mouth portion of the outer layer body and provided with a check valve for preventing outside air from entering the inner layer body. Is attached. Then, by pressing the outer layer body, the inner layer body is pressurized via the air between the outer layer body and the inner layer body, thereby opening the valve body of the check valve and discharging the contents. Also, the outer layer body is provided with a through hole for taking in outside air between the inner layer body, and when the outer layer body is restored to the original shape after pouring, the outside air is taken in from the through hole, and the inner layer body is Only the outer layer body is restored with the volume reduced and deformed.

JP 2013-151316 A

  By the way, when filling the contents of the heated state into the double container body, attach the double container cap to the double container body, seal it so that the cooling shower does not enter the container, and then cool the contents. I do. When the consumer stores the product manufactured in this way in a refrigerator, takes it out of the refrigerator, and leaves it at room temperature, the temperature of the air in the space between the outer layer and the inner layer increases. The volume increases and compresses the inner layer. For this reason, when the upper lid is opened, the contents in the inner layer body may spill out and spout with unintended momentum by the consumer.

  It is an object of the present disclosure to solve such problems, and an object of the present disclosure is to provide a cap for a double container and a container for a double container capable of suppressing the spillage of the contents during use. It is to propose a method of manufacturing a cap.

The cap for the double container of the present disclosure,
A double container cap to be attached to a double container main body including an inner layer body for containing the contents, and a squeezable outer layer body for housing the inner layer body, the outer layer body having a through hole in a mouth portion. And
A cap body that has a pouring hole for pouring contents from the inner layer body, and is attached to the mouth of the outer layer body,
A lid covering at least a part of the cap body including the pouring hole,
The cap body has an outside air introduction hole that communicates a space between the inner layer body and the outer layer body with the outside through the through hole, and a protruding portion that is provided with an engaging portion that protrudes upward.
The lid is provided with a vent on the upper wall of the lid, and covers the outside air introduction hole when the lid is closed,
The vent hole is closed by the engaging portion engaging with the edge of the vent hole when the double container cap that has never opened the lid is not opened, and the lid is closed. When opened, the engagement between the engaging portion and the edge of the vent hole is released, the vent hole is opened, and when the lid is closed and closed again, the engaging portion engages with the vent hole. Is pressed from below, and the vent hole is kept open.

  Also, in the cap for a double container according to the present disclosure, in the above configuration, the engagement portion is an enlarged diameter portion formed at an upper end portion of the protruding portion, and the enlarged diameter portion has a concave portion formed on an upper surface thereof. It is preferred that

  Further, in the double container cap of the present disclosure, in the above configuration, a thin portion that promotes upward displacement of the ventilation hole by pressing from below is provided around the ventilation hole in the upper wall of the lid. Preferably, it is formed.

Further, the method for manufacturing the double container cap of the present disclosure,
A double container cap to be attached to a double container main body including an inner layer body for containing the contents, and a squeezable outer layer body for housing the inner layer body, the outer layer body having a through hole in a mouth portion. The method of manufacturing
A pouring hole for pouring out the contents from the inner layer body, an outside air introducing hole for communicating a space between the inner layer body and the outer layer body with the outside through the through hole, and a protruding portion protruding upward. And forming a cap body to be attached to the mouth of the outer layer body,
Forming at least a part of the cap body including the pouring hole and the outside air introducing hole, and forming a lid having a ventilation hole in an upper wall;
Attaching the lid to the cap body, and projecting an upper end of the projection upward through the ventilation hole;
Forming an engaging portion at the upper end of the protruding portion, the engaging portion being engageable with an edge of the ventilation hole.

  ADVANTAGE OF THE INVENTION According to this indication, the cap for double containers which can suppress the spilling of the content at the time of use, and the manufacturing method of the cap for double containers can be proposed.

It is a front sectional view showing the state where the cap for double containers concerning one embodiment of the present disclosure was attached to the mouth of the double container main body (at the time of unopening). It is an expanded sectional view of the protrusion part in FIG. FIG. 3 is an enlarged cross-sectional view of a protruding portion when the lid is closed again after the lid is opened in FIG. 2. It is a flowchart which shows each procedure for implementing the manufacturing method of the cap for double containers which concerns on one Embodiment of this indication. FIG. 9 is an enlarged partial cross-sectional view showing a state where an enlarged-diameter portion (engaging portion) is formed on a protruding portion of a cap body using a pressing jig. It is the figure which looked at the pressing jig from the pressing surface side.

  Hereinafter, the present disclosure will be described more specifically with reference to the drawings.

  FIG. 1 shows a state in which a double container cap 1 according to an embodiment of the present disclosure is mounted on a double container main body 2 which fits the cap. The double container cap 1 includes a cap body 10, an inner stopper 20, a moving valve 30, a coupling valve 40, and a lid 50. The double container main body 2 includes an inner layer body 3 and an outer layer body 4. In this specification, the claims, the abstract, and the drawings, the side where the lid body 50 described later is located is the upper side (upper side in FIG. 1), and the side where the double container body 2 is located is the lower side (FIG. 1). Below). Further, the term “radially outward” refers to a direction that goes outward along a straight line that passes through the center axis O of the double container cap 1 in FIG. 1 and that is perpendicular to the central axis O, and the term “radially inside” refers to a direction along the straight line. Means the direction toward the central axis O.

  First, the double container body 2 will be described. In the present embodiment, the double container main body 2 is configured such that the parison formed by laminating the synthetic resin material of the inner layer body 3 and the synthetic resin material of the outer layer body 4 is subjected to extrusion blow molding to form a laminated peeling container. Shaping. The inner layer 3 constituting the double container body 2 is made of ethylene-vinyl alcohol copolymer resin (EVOH) or nylon. In addition, low-density polyethylene (LDPE) or high-density polyethylene resin (HDPE) is used for the material of the outer layer body 4, and particularly when LDPE is used, high squeezing properties can be imparted. However, the present invention is not limited to this embodiment. For example, when forming a laminated peeling container by performing biaxial stretch blow molding, polypropylene (PP) is used as the material of the inner layer body 3 and the material of the outer layer body 4 is used as the material of the outer layer body 4. Polyethylene terephthalate (PET) may be used. Further, as the material of the inner layer body 3 and the outer layer body 4, other resins having low compatibility with each other can be used. Furthermore, the double container main body 2 may be not a laminated peeling container, but may be one in which the outer layer body 4 and the inner layer body 3 are separately formed and assembled. Although not shown, one or a plurality of adhesive strips extending vertically and partially joining the inner layer body 3 and the outer layer body 4 between the inner layer body 3 and the outer layer body 4. May be provided.

  The inner layer body 3 is formed so as to be able to reduce the volume, and in this embodiment, is obtained by peeling off the outer layer body 4 from the double container body 2 formed in a laminated state. . The inner layer body 3 includes a storage space S for storing contents therein, and an upper opening 3a connected to the storage space S.

  The outer layer body 4 is formed by connecting a cylindrical portion having a recoverable flexibility (not shown) and a bottom portion closing a lower end of the cylindrical portion to a cylindrical peripheral wall 4a (port portion). A male screw portion 4b is provided on the outer peripheral surface of the mouth peripheral wall 4a. Further, a through hole 4c for taking in air between the inner peripheral body 3 and the mouth peripheral wall 4a is provided, and a male screw part 4b is vertically formed on the outer peripheral surface provided with the through hole 4c. A notched groove 4d is provided.

  Next, regarding the double container cap 1, first, the cap body 10 will be described. The cap body 10 has an outer peripheral wall 11 surrounding the mouth peripheral wall 4a, and a female screw portion 12 corresponding to the male screw portion 4b of the mouth peripheral wall 4a is formed on the inner peripheral surface of the outer peripheral wall 11a. A top wall 13 is integrally connected to an upper portion of the outer peripheral wall 11. A pouring cylinder 14 is provided on the upper surface of the top wall 13, and a pouring hole 14 a for pouring contents is formed on an inner peripheral surface of the pouring cylinder 14. On the lower surface of the top wall 13, a pair of upper fitting walls 15 having a concentric double arrangement are provided. Further, an outside air introduction hole 16 penetrating through the top wall 13 is provided radially outside the upper fitting wall 15. In the present embodiment, a step is provided between the central portion and the outer peripheral portion of the top wall 13 (the outer peripheral portion is lower in height than the central portion), and the step is opened outward in the radial direction. And an outside air introduction hole 16 is provided. With this configuration, it is difficult for the contents overflowing on the top wall 13 to enter the outside air introduction hole 16. Note that the lower end of the outer peripheral wall 11 is in airtight contact with the mouth peripheral wall 4a, and a ventilation path T communicating with the through hole 4c is provided between the mouth peripheral wall 4a and the outer peripheral wall 11.

  As shown in FIGS. 1 to 3, at a radial position between the spouting tube 14 and the outer peripheral wall 11 on the top wall 13 of the cap body 10, a protruding portion projecting upward from the upper surface of the top wall 13. 18 are provided. As shown in FIG. 2, an enlarged diameter portion 18 a (engaging portion) that expands radially outward is provided at the upper end of the protruding portion 18. When the lid 50 shown in FIG. 2 has not been opened yet and is not opened, the enlarged diameter portion 18a engages with the edge of the ventilation hole 52a, so that the ventilation hole 52a is closed.

  In the present embodiment, the groove 4d, which cuts the male screw 4b in the vertical direction, is used as the ventilation path T, but is not limited to this mode. The gap between the male screw part 4b and the female screw part 12 may be used as the ventilation path T without providing the groove part 4d.

  Inside plug 20 is provided inside cap body 10. The inner plug 20 is located between the pouring hole 14 a and the inner layer 3, and has a partition 21 that covers the upper opening 3 a of the inner layer 3.

  The partition 21 has, at one end, a pouring hole 14a side opening that opens to the pouring hole 14a side, and at the other end, an inner layer body 3 side opening that opens to the accommodation space S side of the inner layer body 3. A wall 22 is provided. As shown in FIG. 1, the cylindrical wall 22 of the present embodiment is provided with a through hole 22 a in a part of the partition 21, and extends the cylindrical portion 22 b from the edge of the through hole 22 a toward the accommodation space S. , A cylindrical portion having a through hole 22d at the lower end via the inclined portion 22c. In the present embodiment, the opening on the pouring hole 14a side corresponds to the through hole 22a, and the opening on the inner layer body 3 side corresponds to the through hole 22d. The partition 21 is provided with a hole (communication opening 23) penetrating through the partition 21 adjacent to the cylindrical wall 22. In the present embodiment, the communication port 23 is provided at one location adjacent to one cylindrical wall 22, but the numbers of the communication port 23 and the cylindrical wall 22 are not limited to this mode. Here, the relationship between the total opening area of the inner layer body 3 side opening (the through hole 22d) and the total opening area of the communication port 23 in the cylindrical wall 22 is preferably such that the total opening area of the communication port 23 is larger. However, the present invention is not necessarily limited to this.

  The partition 21 includes a step portion 24 that is bent radially outward from the communication port 23 toward the storage space S, and a groove that opens upward between the step portion 24 and the radial direction outside the step portion 24 is formed between the partition 21 and the step portion 24. A fitting wall 25 to be formed is provided. An annular seal wall 26 that sandwiches the inner layer body 3 with the outer layer body 4 is provided on the lower surface of the partition 21. As shown in FIG. 1, at least one groove 27 is provided on the outer edge of the partition 21.

  In the present embodiment, a spherical moving valve body 30 is provided in the cylindrical wall 22. The movable valve body 30 is movable between the cylindrical wall 22 and the movable valve body 30 in accordance with the change in the attitude of the double container main body 2, and the content is almost not passed (substantially not passed). A gap is provided. In addition, since the pouring hole 14a side of the cylindrical wall 22 is opened by the through hole 22a, and the storage space S side is opened by the through hole 22d, the contents that have entered the cylindrical wall 22 move the moving valve. The movement of the body 30 is not hindered. The movable valve element 30 is configured such that the double container main body 2 is in an upright posture (a posture in which the bottom of the double container main body 2 is placed on a horizontal base), thereby the inclined portion 22 c of the cylindrical wall 22. To sit down. Thereby, the accommodation space S can be sealed.

  As described later, when the body of the outer layer body 4 is pressed (squeezed) while the double container main body 2 is changed from the upright posture to the inclined posture in order to pour out the contents from the pouring hole 14a, the cylindrical wall 22 is pressed. The movable valve element 30 moves toward the pouring hole 14a. After the required amount of contents is poured out, when the pressing of the outer layer body 4 against the body is released and the double container main body 2 is returned to the original standing posture, the moving valve body 30 is moved by its own weight or the like. The body 3 moves to the accommodation space S side. As a result, a space is created on the side of the discharge hole 14a in the cylindrical wall 22. Therefore, the contents remaining in the discharge tube 14 and the inner space K1 are transferred to the cylindrical wall 22 through the through hole 22a. It can be moved (suck back function), and dripping can be effectively prevented.

  A check valve 43 is provided between the cap body 10 and the inner plug 20. The check valve 43 is provided radially inside the cylindrical annular wall 41 as a part of the coupling valve 40. The check valve 43 is a so-called three-point valve having a structure in which three locations on the outer periphery of a disc-shaped check valve body 43a are supported by a check valve arm 43b. When the pressure in the inner layer body 3 increases due to the squeeze of the outer layer body 4, the pressure raises the check valve body 43a upward in FIG. The check valve 43 is opened by the separation. When the squeeze of the outer layer body 4 is released, no pressure is applied to the check valve body 43a. Therefore, the check valve body 43a comes into contact with the partition 21 again by its own weight and the elastic force of the check valve arm 43b, The stop valve 43 closes.

  In the present embodiment, the check valve body 43a is formed of a disc-shaped member. However, the present invention is not limited to this mode, and may be a member having a rectangular shape or the like. Further, the check valve 43 does not necessarily have to be a three-point valve, and various valves such as a two-point valve and a thin annular valve that are opened by the positive pressure in the inner layer body 3 can be used.

  On the other hand, an outside air introduction valve 45 is provided radially outside of the annular wall 41, as shown in FIG. The outside air introduction valve 45 is formed outside the annular wall 41 in the radial direction as an annular and thin valve body 45a. The valve element 45a has an inner peripheral end connected to the outer peripheral surface of the annular wall 41 and an outer peripheral end seated on the lower surface of the top wall 13 of the cap body 10, thereby allowing only a very small amount of air to pass through. The outside air introduction hole 16 is closed to the extent permitted. In the present embodiment, while the annular valve body 45a is formed of a soft member, as shown in FIG. 1, the annular valve body 45a is formed in a curved shape that is convex toward the inner layer body 3 side. By adopting this curved shape, the valve body 45a contacts the top wall 13 until a predetermined negative pressure is applied, and the outside air introduction valve 45 can be maintained in a semi-closed state that allows only a very small amount of air to pass through. . When the consumer presses the body of the outer layer body 4 and a positive pressure is applied to the valve body 45a, the valve body 45a contacts the top wall 13 with a stronger pressing force. The closed state does not allow the passage of air.

  When a negative pressure is generated in the space between the outer layer body 4 and the inner layer body 3, the valve body 45a is easily elastically deformed downward. Therefore, the outside air introduction valve 45 is opened, and the outside air can be smoothly introduced.

  In this embodiment, the check valve 43 and the outside air introduction valve 45 are configured to be provided integrally with the annular wall 41, but the present invention is not limited to this mode. For example, the check valve 43 may be provided on the first annular wall, and the outside air introduction valve 45 may be provided on the second annular wall, so that both may be configured separately. Further, the check valve 43 and the outside air introduction valve 45 may be fixed to something other than the annular wall 41.

  In the present embodiment, even when the check valve body 43a is closed, the through hole 22a and the discharge hole 14a communicate with each other through gaps on both sides in the width direction of the check valve arm 43b. Thereby, the through-hole 22a of the cylindrical wall 22 is always opened. When the check valve 43 is attached to the cap body 10 and the inner plug 20 as shown in FIG. 1, the lower part of the annular wall 41 is fitted and held between the step portion 24 and the fitting wall 25, and The upper part of the wall 41 is fitted and held by a pair of upper fitting walls 15. As a result, as shown in FIG. 1, an inner space K <b> 1 is formed on the radially inner side of the annular wall 41 so as to connect the communication port 23 and the discharge hole 14 a to form a flow path for the contents, and the annular space 41 is formed. An outer space K2 is formed on the radially outer side of the wall 41 so as to communicate the outside air introduction hole 16 and the groove 27 to form an air flow path.

  As shown in FIG. 1, the lid 50 is connected to the outer peripheral wall 11 of the cap body 10 via the hinge 51, and covers the pouring hole 14 a and the outside air introducing hole 16 by bending the hinge 51. Can be. More specifically, the lid 50 includes an upper wall 52 and a side wall 53 which is connected to the outer edge of the upper wall 52 and has a shape continuous with the outer peripheral wall 11. Further, the upper wall 52 is provided with a ventilation hole 52a for communicating a space between the lid 50 and the cap body 10 with the outside as shown in FIG. FIG. 2 shows the upper wall portion 52 of the lid 50 when the double container cap 1 in which the lid 50 has never been opened is not opened. The vent hole 52a is closed by the engagement of the enlarged diameter portion 18a formed at the upper end of the protrusion 18 with the edge of the vent hole 52a. That is, in FIG. 2, the upper end of the protruding portion 18 is fitted into the ventilation hole 52 a, and the lower surface of the enlarged diameter portion 18 a contacts the holding portion 52 c of the upper wall 52, so that the ventilation hole 52 a is hermetically sealed. I have. As described later, a thin portion 52b is provided around the ventilation hole 52a to press the periphery of the ventilation hole 52a from below to promote upward displacement of the ventilation hole 52a (see FIG. 3). ).

  A grip portion 58 protruding radially outward is provided on the upper portion of the side wall 53 of the lid 50 facing the hinge 51. The user grips the grip portion 58 and removes the lid 50. It can be lifted upward to open, or pushed downward to close. When the lid 50 is closed, the inner peripheral surface of the side wall 53 engages with the top wall step 13a undercut, and the lid 50 is firmly fixed to the cap body 10. The lid 50 may be separate from the cap body 10 without providing the hinge 51, and may be configured to be attached to the cap body 10 with screws or undercuts.

  Further, the lid body 50 is provided with a seal cylinder 54 that hangs down from the lower surface of the upper wall 52, fits into the pouring cylinder 14 when the lid body 50 is closed, and seals the pouring hole 14a in a liquid-tight manner. .

  As shown in FIG. 2, after the large-diameter portion 18 a is engaged with the edge of the vent hole 52 a to close the vent hole 52 a, the contents in a heated state are filled into the double container body 2 at the time of manufacture, The dual container cap 1 is attached to the double container main body 2 and can be sealed so that cooling water does not enter the double container main body 2 when the content is cooled by the cooling shower.

  On the other hand, when the lid 50 is opened by gripping the grip portion 58 and the lid 50 is closed again after using the contents, the enlarged diameter portion 18a formed in the protruding portion 18 causes the holding portion 52c around the ventilation hole 52a to be closed. As a result, as shown in FIG. 3, the enlarged diameter portion 18a bends and its outer edge is displaced downward. The thin portion 52b is bent by the pressing force from the enlarged diameter portion 18a, and the air hole 52a is displaced upward. As shown in FIG. 3, a concave groove 52d is provided intermittently in the circumferential direction on the lower surface of the holding portion 52c. In addition, a concave portion 18b having a predetermined shape is formed on the upper surface of the enlarged diameter portion 18a, as described later. Therefore, when the enlarged diameter portion 18a comes into contact with the lower surface of the holding portion 52c as shown in FIG. 3, a ventilation path is formed between the two by the concave groove 52d and the concave portion 18b. The space between the lid 50 and the cap body 10 can be communicated with the outside through this ventilation path.

  When packing and shipping the double container filled with the contents, it is preferable to cover at least the double container cap 1 with a shrink film or the like from the state shown in FIG. This can prevent the lid 50 from being opened at the time of conveyance and ejecting the contents, and can have a virgin seal function (unopened guarantee function).

  In discharging the contents from the double container cap 1 configured as described above, after removing the shrink film, the lid 50 is opened and the posture of the double container body 2 is changed from the standing posture to the inclined posture. Then, the body of the outer layer body 4 is pressed (squeezed). Thereby, the moving valve body 30 in the cylindrical wall 22 moves to the pouring hole 14a side, and the accommodation space S is pressurized via the air between the inner layer body 3 and the outer layer body 4. When the body of the outer layer body 4 is being pressed, pressure is also applied to the valve body 45a from below through the through hole 4c, the ventilation path T, and the groove 27, so that the outside air introduction valve 45 is closed. Therefore, even if the outer layer body 4 is pressed, the air between the inner layer body 3 and the outer layer body 4 does not leak from the outside air introduction hole 16, and the pressurization of the storage space S is not hindered. Then, the positive pressure in the storage space S lifts the check valve body 43a, so that the content flows out of the communication port 23 and is discharged to the outside from the discharge hole 14a via the inner space K1. Here, since the total opening area of the communication port 23 is made larger than the total opening area of the opening (the through hole 22d) on the inner layer body 3 side of the cylindrical wall 22, when the contents flow, the communication port 23 is closed. Resistance can be further reduced and can be poured smoothly.

  After the required amount of content has been poured, the pressing of the outer layer body 4 against the body is released. As a result, the positive pressure in the storage space S returns to the outside air pressure, and the check valve element 43a closes the communication port 23 again, so that outside air can be prevented from entering the storage space S. In addition, since the outer layer body 4 tries to return to the original shape by its own restoring force, the space between the inner layer body 3 and the outer layer body 4 becomes negative pressure. As a result, the pressure below the outside air introduction valve 45 also becomes negative through the through hole 4c, the ventilation path T, and the groove 27, so that the valve body 45a is pulled downward and the outside air introduction valve 45 is opened. With the opening of the outside air introduction valve 45, air flows in from the outside air introduction hole 16, and the space between the outer layer body 4 and the inner layer body 3 from the through hole 4c via the outer space K2, the groove 27, and the ventilation path T. Air is introduced into the air. As a result, the outer layer body 4 can be restored while the inner layer body 3 is deformed in a reduced volume.

  When the check valve valve body 43a closes the communication port 23, although the contents remain in the pouring cylinder 14 and the inner space K1, when the double container main body 2 is returned to the original standing posture. The moving valve body 30 moves to the accommodation space S side of the inner layer body 3 by its own weight or the like. As a result, a space is created on the side of the discharge hole 14a in the cylindrical wall 22. Therefore, the contents remaining in the discharge tube 14 and the inner space K1 are transferred to the cylindrical wall 22 through the through hole 22a. It can be moved (suck back function), and dripping can be effectively prevented.

  When the content is a food seasoning or the like, the consumer stores the double container in which the content remains in a refrigerator or the like in order to maintain the freshness of the content. When the double container is taken out of the refrigerator and put in a room temperature environment for a certain period of time in order to use the contents again, if the ventilation hole 52a is not provided, the inside of the space between the outer layer body 4 and the inner layer body 3 is not provided. As the temperature of the air increases, the pressure increases and the inner layer 3 is compressed. As a result, the pressure in the inner layer body 3 is increased, so that when the lid 50 is opened, the contents in the inner layer body 3 may be spilled out with unintended momentum by the consumer.

  In the present embodiment, even if the pressure of the air in the space between the outer layer body 4 and the inner layer body 3 rises after the double container is taken out of the refrigerator, the rise in the pressure is gradual. Is opened to the outside from the ventilation hole 52a through a small gap between the valve body 45a of the outside air introduction valve 45 and the top wall 13 and a ventilation path formed by the concave groove 52d and the concave portion 18b shown in FIG. Therefore, since the compression of the inner layer body 3 can be suppressed, even if it is taken out after being stored in the refrigerator, unintended ejection of contents accompanying the opening of the lid body 50 can be suppressed.

  Next, a method for manufacturing the double container cap 1 according to the present embodiment will be described in detail. FIG. 4 is a flowchart showing each procedure for carrying out the method for manufacturing the double container cap 1.

  When manufacturing the double-container cap 1 according to the present embodiment, first, the cap body 10 to be attached to the peripheral wall 4a of the double-container body 2 is formed (Step S101). The cap body 10 includes an outer peripheral wall 11 surrounding the outer peripheral wall 4 a of the double container main body 2, a top wall 13 that closes an upper end of the outer peripheral wall 11, and has a pouring cylinder 14, an outside air introduction hole 16, and a protrusion 18. (See FIG. 1). The cap body 10 can be formed by injection-molding a synthetic resin such as polyethylene (PE) or polypropylene (PP).

  Further, a lid 50 for covering the pouring hole 14a provided in the cap body 10 is formed (Step S103). In the present embodiment, as shown in FIG. 1, the lid 50 is connected to the cap main body 10 by the hinge 51 and is formed integrally with the cap main body 10, but may be formed separately as described above. . The lid 50 can also be formed by injection molding a synthetic resin such as polyethylene (PE) or polypropylene (PP). The formation order of the cap body 10 in step S101 and the formation of the lid body 50 in step S103 does not matter.

  In addition to the above, in manufacturing the double container cap 1 according to the present embodiment, the inner plug 20 that covers the upper end portion of the mouth peripheral wall 4a and the movement that moves in the cylindrical wall 22 formed in the inner plug 20 are provided. The valve body 30 and the connection valve 40 forming the check valve 43 and the outside air introduction valve 45 are formed by, for example, injection molding.

  Next, the lid 50 formed in step S103 is attached to the cap body 10 formed in step S101 (step S105). In the present embodiment, the lid 50 is mounted by engaging the inner peripheral surface of the side wall 53 of the lid 50 with the top wall step 13 a formed on the outer peripheral end of the top wall 13 of the cap body 10 by undercut engagement. Performed by When the lid 50 is mounted on the cap body 10, the pouring hole 14 a is closed by the lid 50, and as shown in FIG. The air holes 52a provided in the wall 52 penetrate upward.

  After the protruding portion 18 on the cap body 10 side penetrates through the ventilation hole 52a of the lid 50 due to the closure of the lid 50, as shown in FIG. Pressing by 60 causes the enlarged diameter portion 18a to be formed (step S107).

  The pressing jig 60 used in the present embodiment has a cylindrical shape as shown in FIGS. 5 and 6 (a), and a cross-shaped projection 62 is provided on the bottom surface thereof. By pressing the upper end of the protruding portion 18 shown in FIG. 5 from above using the pressing jig 60 having such a bottom shape, a flange-shaped enlarged diameter portion 18a is formed. The portion 18a is shown by a two-dot chain line in FIG. 5). Then, on the upper surface of the enlarged diameter portion 18a, a cross-shaped concave portion 18b in which the unevenness of the protrusion 62 on the pressing jig 60 side is inverted is formed. In the formation of the enlarged diameter portion 18a by the pressing jig 60, the enlarged diameter portion 18a may be formed only by the pressing force, or the upper end portion of the protruding portion 18 may be pressed by the pressing jig 60 while heating. . Further, the enlarged diameter portion 18a may be formed by heating the upper end of the protruding portion 18 without depending on the pressing force. Further, the shape of the bottom surface of the pressing jig 60 to be used and the shape of the concave portion 18b formed on the upper surface of the enlarged diameter portion 18a are not limited to the cross shape shown in FIGS. The concave portion can be formed using a pressing jig having various other shapes, such as a pressing jig 70 having a linear projection 72 shown in FIG. By performing step S107, the manufacture of the double container cap 1 is completed.

  By forming the concave portion 18b on the upper surface of the enlarged diameter portion 18a in this way, when the enlarged diameter portion 18a abuts on the lower surface of the holding portion 52c as shown in FIG. An air passage is formed by the concave portion 18b. The space between the lid 50 and the cap body 10 can be communicated with the outside through this ventilation path.

  As described above, the double container cap 1 according to the present embodiment has the pouring hole 14a for pouring out the contents from the inner layer body 3, and the outer peripheral wall 4a (mouth) of the outer layer body 4. And a cover 50 covering at least a part of the cap body 10 including the pouring hole 14a, and the cap body 10 is provided with a through-hole provided in the mouth peripheral wall 4a of the outer layer body 4. 4c has an outside air introduction hole 16 for communicating the space between the inner layer body 3 and the outer layer body 4 with the outside, and a protruding portion 18 protruding upward and having an engaging portion. The upper wall 52 of the body 50 is provided with a ventilation hole 52a, which covers the outside air introduction hole 16 when the lid 50 is closed. The ventilation hole 52a is an unopened cap of the double container cap 1 in which the lid 50 has never been opened. At the time, the engaging portion is closed by engaging with the edge of the ventilation hole 52a, When the body 50 is opened, the engagement between the engaging portion and the edge of the vent hole 52a is released, and the vent hole 52a is opened. The periphery of 52a is pressed from below, and the ventilation hole 52a is configured to be kept open. By adopting such a configuration, it is possible to suppress the compression of the inner layer body 3 when the double container in which the contents are left is stored in a refrigerator and then taken out and placed in a normal temperature environment. Unintended ejection of contents due to opening of the door can be suppressed. Further, even if the consumer does not intentionally switch between the closed state and the open state of the ventilation hole 52a, the ventilation hole 52a is automatically operated by a normal operation performed by the consumer when using the contents of opening and closing the lid 50. And the space between the lid 50 and the cap body 10 is communicated with the outside, so that unintended ejection of contents can be suppressed.

  Further, in the present embodiment, the engaging portion is the enlarged diameter portion 18a formed at the upper end of the protruding portion 18, and the concave portion 18b is formed on the upper surface of the enlarged diameter portion 18a. By adopting such a configuration, when the lid 50 is opened and then closed again, when the enlarged diameter portion 18a presses the periphery of the ventilation hole 52a from below, the lid 50 and the cap are connected through the recess 18b and the ventilation hole 52a. The pressure in the space between itself and the main body 10 can be reliably released to the outside. Therefore, since the compression of the inner layer body 3 when the double container is taken out after being stored in the refrigerator and placed in a room temperature environment can be suppressed, the unintended ejection of contents accompanying the opening of the lid 50 is suppressed. be able to.

  Further, in the present embodiment, a thin portion 52b is formed around the ventilation hole 52a in the upper wall 52 of the lid 50 to promote upward displacement of the ventilation hole 52a by pressing from below. . By adopting such a configuration, when the lid 50 is opened and then closed again, it is possible to reliably suppress the engagement of the enlarged diameter portion 18a with the air hole 52a and open the air hole 52a.

  Further, in the method for manufacturing the double container cap 1 according to the present embodiment, between the inner layer body 3 and the outer layer body 4 through the pouring hole 14a for pouring out the contents from the inner layer body 3 and the through hole 4c. Forming a cap body 10 having an outside air introduction hole 16 for communicating the space with the outside and a projecting portion 18 projecting upward, and attached to the mouth peripheral wall 4a (mouth) of the outer layer body 4; Forming at least a portion of the cap body 10 including the pouring hole 14a and the outside air introduction hole 16 and forming a lid 50 having a vent hole 52a in the upper wall 52; and attaching the lid 50 to the cap body 10. A step of projecting the upper end of the projection 18 upward through the ventilation hole 52a, and a step of forming an engaging portion at the upper end of the projection 18 that can engage with the edge of the ventilation hole 52a. Configured. By adopting such a configuration, it is possible to suppress the compression of the inner layer body 3 when the double container in which the contents are left is stored in a refrigerator and then taken out and placed in a normal temperature environment. Unintended ejection of contents due to opening of the door can be suppressed. Further, even if the consumer does not intentionally switch between the closed state and the opened state of the ventilation hole 52a, the ventilation hole 52a is automatically operated by a normal operation performed by the consumer when using the contents of opening and closing the lid 50. And the space between the lid 50 and the cap body 10 is communicated with the outside, so that unintended ejection of contents can be suppressed.

  Although the present disclosure has been described with reference to the drawings and embodiments, it should be noted that those skilled in the art can easily make various changes and modifications based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, functions included in each component can be rearranged so as not to be logically inconsistent, and a plurality of components can be combined into one or divided. It should be understood that these are included in the scope of the present invention.

  For example, in the present embodiment, when the lid 50 is opened and then closed again to bring the enlarged diameter portion 18a into contact with the lower surface of the holding portion 52c, ventilation is provided between the two by the concave groove 52d and the concave portion 18b. Although the path is formed, it is not limited to this mode. An air passage may be formed by providing one of the concave groove 52d and the concave portion 18b.

  Further, in the present embodiment, in the upper wall 52 of the lid 50, the holding portion 52c is displaced upward by bending the thin portion 52b by the pressing force from the enlarged diameter portion 18a. Is not limited. For example, a predetermined area around the ventilation hole 52a of the upper wall 52 is uniformly formed to be thin, and when the lid 50 is closed again after the lid 50 is opened, the area is elastically deformed upward, thereby increasing the diameter of the enlarged portion. The configuration may be such that the 18a does not engage with the edge of the ventilation hole 52a.

  Further, the cross-sectional shape of the moving valve body 30 can be appropriately changed according to the cross-sectional shape of the cylindrical wall 22. Further, the cylindrical wall 22 and the moving valve body 30 do not necessarily have to be provided. Further, the outer layer body 4 and the inner layer body 3 are not limited to those formed by blow molding a parison having a laminated structure, but the outer layer body 4 and the inner layer body 3 are individually formed, and then the inner layer body 3 is replaced with the outer layer body. 4 may be used.

  According to the present disclosure, it is possible to propose the double-container cap 1 capable of suppressing the spillage of the contents during use.

DESCRIPTION OF SYMBOLS 1 Double container cap 2 Double container main body 3 Inner layer body 3a Upper opening 4 Outer layer body 4a Peripheral wall (mouth)
4b Male thread 4c Through hole 4d Groove 10 Cap body 11 Outer peripheral wall 12 Female thread 13 Top wall 13a Top wall step 14 Outflow cylinder 14a Outflow hole 15 Upper fitting wall 16 Outside air introduction hole 18 Projection 18a Enlarged portion ( Engagement part)
18b Concave portion 18c Reduced diameter portion 20 Inner plug 21 Partition wall 22 Cylindrical wall 22a Through hole (opening on pouring hole side)
22b Cylindrical part 22c Inclined part 22d Through hole (inner layer side opening)
Reference Signs List 23 communication port 24 step 25 fitting wall 26 sealing wall 27 groove 30 moving valve body 40 coupling valve 41 annular wall 43 check valve 43a check valve body 43b check valve arm 45 outside air introduction valve 45a valve body 47 peripheral wall 50 Lid 51 Hinge 52 Upper wall 52a Vent hole 52b Thin part 52c Holding part 52d Concave groove 53 Side wall 54 Seal cylinder 58 Gripping part 60 Pressing jig 62 Projecting part 70 Pressing jig 72 Projecting part K1 Inner space K2 Outer space O Center axis S Housing Space T Vent

Claims (4)

A double container cap to be attached to a double container main body including an inner layer body for containing the contents, and a squeezable outer layer body for housing the inner layer body, the outer layer body having a through hole in a mouth portion. And
A cap body that has a pouring hole for pouring contents from the inner layer body, and is attached to the mouth of the outer layer body,
A lid covering at least a part of the cap body including the pouring hole,
The cap body has an outside air introduction hole that communicates a space between the inner layer body and the outer layer body with the outside through the through hole, and a protruding portion that is provided with an engaging portion that protrudes upward.
The lid is provided with a vent on the upper wall of the lid, and covers the outside air introduction hole when the lid is closed,
The vent hole is closed by the engaging portion engaging with the edge of the vent hole when the double container cap that has never opened the lid is not opened, and the lid is closed. When opened, the engagement between the engaging portion and the edge of the vent hole is released, the vent hole is opened, and when the lid is closed and closed again, the engaging portion engages with the vent hole. Characterized in that the periphery of the container is pressed from below and the vent hole is kept open.   2. The double container cap according to claim 1, wherein the engaging portion is an enlarged diameter portion formed at an upper end portion of the protruding portion, and the enlarged diameter portion has a concave portion formed on an upper surface thereof. 3.   3. The double container according to claim 1, wherein a thin portion is formed around the air hole in the upper wall of the lid to promote upward displacement of the air hole by pressing from below. For cap. A double container cap to be attached to a double container main body including an inner layer body for containing the contents, and a squeezable outer layer body for housing the inner layer body, the outer layer body having a through hole in a mouth portion. The method of manufacturing
A pouring hole for pouring out the contents from the inner layer body, an outside air introducing hole for communicating a space between the inner layer body and the outer layer body with the outside through the through hole, and a protruding portion protruding upward. And forming a cap body to be attached to the mouth of the outer layer body,
Forming at least a part of the cap body including the pouring hole and the outside air introducing hole, and forming a lid having a ventilation hole in an upper wall;
Attaching the lid to the cap body, and projecting an upper end of the projection upward through the ventilation hole;
Forming an engaging portion at the upper end of the protruding portion, the engaging portion being engageable with an edge of the vent hole.

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