JP7365144B2 - Pour cap for double container and double container - Google Patents

Description

The present invention provides a double container pouring cap that is attached to a container body that includes an inner layer body that accommodates the contents and an outer layer body that houses the inner layer body, and that pours out the contents when the outer layer body is pressed. , and a double container in which the pouring cap is attached to the container body.

In recent years, for containers in which a pouring cap is attached to a container body for accommodating contents, a double container (delamidium) using a container body composed of an inner layer and an outer layer, as shown in Patent Document 1, for example, has been developed. containers (also called laminated containers) are used. This type of outer layer is flexible and has through holes (vents) that pass through the front and back to allow air to be taken into the internal space formed between it and the inner layer. has been done. The pouring cap is provided with an air valve that prevents air from leaking from the interior space to the outside world, while allowing air to be introduced from the outside world into the interior space when the interior space is depressurized.

According to the double container having such a configuration, the internal space is pressurized by pressing the outer layer, thereby increasing the pressure in the filling space and making it possible to pour out the contents. Furthermore, when the pressure on the outer layer is released, the inner space is depressurized as the outer layer returns to its original state, and as a result, air is introduced into the inner space from the vent, allowing only the inner layer to be deformed to reduce its volume. That is, there is an advantage that the self-supporting nature of the container is maintained even if the contents are reduced. Furthermore, since the contents can be poured out without replacing it with outside air, there is also the advantage that the quality of the stored contents is less likely to deteriorate. For this reason, containers of this type are increasingly being used as suitable containers for storing seasonings such as soy sauce, sauces, mirin, and cooking sake, and cosmetics such as shampoos, conditioners, liquid soaps, and lotions.

Japanese Patent Application Publication No. 2011-31932

As shown in Patent Document 1, the above-mentioned pouring cap includes an air valve inside the cap body that is attached to the outer layer body. The cap body is equipped with an outside air inlet that communicates with the vent in the outer layer, and the air valve normally comes into contact with the back side of the cap body to allow air to flow between the vent and the outside air inlet. On the other hand, when the internal space becomes depressurized, it elastically deforms away from the back surface of the cap body, allowing air to flow between the vent and the outside air introduction port.

However, depending on the amount and flow rate of air introduced into the internal space, the air valve separated from the back surface of the cap body may vibrate, causing noise.

The present invention aims to solve such problems, and provides a pouring cap for a double container and a double container that can effectively suppress the noise caused by the air valve. The purpose is to provide

The present invention is attached to a container body, which includes an inner layer body having a filling space for accommodating contents, and an outer layer body defining an inner space between the inner layer body and having a vent communicating with the inner space. , a spouting cap for a double container that allows the contents of the filling space to be poured out from the spout by pressing the outer layer,
a cap body that is attached to the outer layer body so as to cover the vent hole and has an outside air introduction port that communicates with the vent hole;
a base directly or indirectly supported by the cap body inside the cap body; one end connected to the base and the other end movable with respect to the base; comes into airtight contact with the inner surface of the cap body to block air flow between the vent and the outside air inlet, while when the internal space is in a reduced pressure state, the other end of the cap body an air valve having a valve body part separated from the inner surface and allowing air to flow between the ventilation port and the outside air introduction port;
The cap is movable within the outside air inlet, is separated from the inner circumferential surface of the outside air inlet, is not connected to the cap body, and moves with its own weight toward the valve body. A dispensing cap for a double container, which includes a moving member that is always in contact with the dispensing member.

The moving member has a convex portion that protrudes radially outward, and a concave portion adjacent to the convex portion in the circumferential direction,
The cap main body includes a lower protrusion that protrudes radially inward from an inner circumferential surface of the outside air inlet and engages with the convex portion to prevent the movable member from coming out downwardly with respect to the outside air inlet. It is preferable to have.

The moving member has a convex portion that protrudes radially outward, and a concave portion adjacent to the convex portion in the circumferential direction,
The cap main body includes an upper protrusion that protrudes radially inward from an inner circumferential surface of the outside air inlet and engages with the convex portion to prevent the movable member from coming out upwardly with respect to the outside air inlet. It is preferable to have.

It is preferable that the cap body and the moving member are made of synthetic resin and have a weakened portion that integrally connects the cap body and the moving member during molding.

The double container of the present invention is comprised of the container body and any of the double container pouring caps.

In the double-container pouring cap of the present invention, the movable member that is movably provided with respect to the cap body is always in contact with the valve body, so that the valve body is separated from the inner surface of the cap body. Vibration is suppressed and noise can be suppressed. Note that in this specification and the like, "abutting" includes not only a state in which two members are in contact with each other, but also a state in which they are slightly apart.

FIG. 1 is a partially enlarged sectional view showing an embodiment of a double container according to the present invention. FIG. 2 is a side cross-sectional view showing an enlarged view of the vicinity of the outside air inlet in FIG. 1 and a plan view thereof. It is a figure which showed the cap main body and the moving member which were integrally connected via the weakened part at the time of molding.

Hereinafter, with reference to FIG. 1, a first embodiment of a double container according to the present invention will be described. In this specification, etc., the "up" direction and the "down" direction refer to a state in which the outer layer body (code 3) is located at the bottom and the lid body (code 9) is located at the top, as shown in FIG. refers to the direction at

The double container of this embodiment includes a container body 1 (consisting of an inner layer body 2 and an outer layer body 3), a pouring cap 4 (an inner stopper 5, a check valve 6, a moving valve 7, a cap body 8, and a moving member). 9), and a lid body 10.

The inner layer body 2 is provided with a filling space S capable of accommodating contents therein. The inner layer body 2 of this embodiment is made of thin synthetic resin and is provided so as to be deformable to reduce its volume.

The outer layer body 3 includes a cylindrical opening 3a extending along the central axis O. In the mouth portion 3a of this embodiment, a lower mouth portion 3c is formed to have a larger diameter than an upper mouth portion 3b having an open upper end. Further, a male threaded portion 3d is provided on the outer peripheral surface of the mouth upper portion 3b. Further, the upper mouth portion 3b is provided with a vent hole 3e extending in the radial direction and penetrating the upper mouth portion 3b, and the outer peripheral surface where the vent hole 3e opens is provided with a vent hole 3e extending in the vertical direction. A notch 3f is provided to divide the male threaded portion 3d. Although not shown, a cylindrical body and a bottom that closes the lower end of the body are provided below the mouth 3a, and the outer layer 3 has a bottle-like shape. Further, the outer layer body 3 of this embodiment is made of synthetic resin, and the body portion has flexibility.

Furthermore, an internal space N is formed between the inner layer body 2 and the outer layer body 3, which communicates with the vent 3e.

The inner layer body 2 and the outer layer body 3 in this embodiment are made by laminating synthetic resins having low compatibility with each other in a releasable manner. Examples of the synthetic resin constituting the inner layer 2 include nylon resin (PA), ethylene vinyl alcohol copolymer resin (EVOH), modified polyolefin resin (for example, "ADMER" (registered trademark) manufactured by Mitsui Chemicals, Inc.), and polyethylene terephthalate. In addition to resin (PET), polyethylene resin (PE) or polypropylene resin (PP) can be used. In addition, the synthetic resins constituting the outer layer 3 include, for example, polyethylene resins (PE) such as low-density polyethylene (LDPE) and high-density polyethylene resin (HDPE), as well as polypropylene resin (PP) and polyethylene terephthalate resin (PET). ) can be adopted. The inner layer body 2 and the outer layer body 3 may be formed of a single synthetic resin so that each has a single layer structure, or may be formed by overlapping multiple synthetic resins so that each has a laminated structure. It may also be something that is done. Such an inner layer body 2 and an outer layer body 3 can be obtained by blow molding a parison in which a synthetic resin material forming the inner layer body 2 and a synthetic resin material forming the outer layer body 3 are laminated. In addition, it is possible to prepare a test tube-shaped preform in which the synthetic resin material of the inner layer 2 and the synthetic resin material of the outer layer 3 are laminated, and to form the preform by biaxial stretch blow molding, or to form the inner layer It is also possible to use a structure in which the body and the outer layer are formed separately, and then the inner layer is placed inside the outer layer. Although not shown, one or more adhesive strips are provided between the inner layer body 2 and the outer layer body 3, extending in the vertical direction and partially joining the inner layer body 2 and the outer layer body 3. may be provided.

The inner stopper 5 includes a partition wall 5a that is located above the mouth portion 3a and closes the filling space S. The partition wall 5a is provided with an opening (content communication port 5b) passing through the partition wall 5a, and a cylindrical wall 5c which is cylindrical as a whole and has a lower diameter reduced relative to an upper part.

Further, an annular recess 5e with an open upper part is provided on the radially outer side of the content communication port 5b and the cylindrical wall 5c, and an inner layer An annular sealing wall 5d is provided in liquid-tight contact with the housing 2. Furthermore, an outer edge wall 5f extending upward is provided at the outer edge of the partition 5a, and a communication opening 5g passing through the connection portion between the partition 5a and the outer edge wall 5f is provided. There is. Note that the inner stopper 5 of this embodiment is made of a synthetic resin such as polypropylene (PP), for example.

The check valve 6 includes an air valve 6a for regulating the flow of air and a spout valve 6b for regulating the flow of contents. The check valve 6 of this embodiment is made of a soft material such as rubber, elastomer, and soft polyethylene (low-density polyethylene).

The air valve 6a has a cylindrical base 6c centered on the central axis O, and the lower end of which is supported by the annular recess 5e. Further, on the outside in the radial direction of the base 6c, there is a thin donut plate shape centered on the central axis O, and as shown in FIG. A valve body portion 6d is provided which extends from there in a downwardly curved manner toward the outside in the radial direction, and has an outer edge portion bulged to be thicker than an inner edge portion. Such a valve body portion 6d can be elastically deformed such that its outer edge portion moves up and down.

The spout valve 6b is located above the content communication port 5b and the cylindrical wall 5c, and is seated on the partition wall 5a to close the content communication port 5b while leaving a part of the cylindrical wall 5c open. It includes a plate-shaped spouting valve main body 6e that remains as it is, and a connecting piece 6f that elastically connects the spouting valve main body 6e and the base 6c. The spout valve 6b is not limited to one that connects the spout valve body 6e and the base 6c with a plurality of connecting pieces 6f, such as a three-point valve or a four-point valve; 6f may connect the spout valve main body 6e and the base 6c.

The moving valve 7 is disposed within the cylindrical wall 5c, and is provided to move along the inner circumferential surface of the cylindrical wall 5c in response to a change in the attitude of the container body 1 or the internal pressure of the filling space S. . As shown in FIG. 1, when the container body 1 is in an upright position, the moving valve 7 is seated at the reduced diameter lower part of the cylindrical wall 5c, so that the cylindrical wall 5c and the filling space S are not communicated with each other. state.

In this embodiment, the cap body 8 is made of synthetic resin, and is integrally connected to the top wall 8a located above the check valve 6 and the outer edge of the top wall 8a, and covers the vent hole 3e. It is provided with an outer peripheral wall 8b surrounding the upper part 3b and having a lower end in airtight contact with the lower mouth part 3c. A female screw portion 8c that fits the male screw portion 3d is provided on the inner peripheral surface of the outer peripheral wall 8b.

A spout tube 8e is provided in the center of the top wall 8a, extending upward from the edge of a hole penetrating the top wall 8a, and having an upper opening as a spout 8d for pouring contents. Further, on the lower surface of the ceiling wall 8a, an annular recess 8f is provided which is open from below and supports the upper end of the base 6c. Further, on the lower surface of the top wall 8a, a step portion 8g whose lower surface extends in the horizontal direction is provided at a portion located directly above the outer edge of the valve body portion 6d.

Further, the ceiling wall 8a is provided with an outside air inlet 8h passing through the front and back sides thereof. As shown in FIG. 2, an upper protrusion 8j that protrudes radially inward is provided above the inner circumferential surface of the outside air introduction port 8h. As shown in the plan view of FIG. 2, a total of two upper projections 8j of this embodiment are provided at intervals in the circumferential direction. Further, a lower protrusion 8k that protrudes radially inward in the same way as the upper protrusion 8j is provided above the inner circumferential surface of the outside air inlet 8h. A total of two lower protrusions 8k are also provided at intervals in the circumferential direction, and in this embodiment are located directly below the upper protrusion 8j.

Furthermore, as shown in FIG. 1, the top wall 8a is provided with a claw portion 8m for holding the lid 10 at its outer edge.

In this embodiment, the moving member 9 is made of synthetic resin, and as shown in FIG. 2, has a cylindrical lower portion 9a, and is integrally connected to the lower portion 9a and has a larger diameter than the lower portion 9a. It has a circular upper portion 9b. The upper portion 9b is provided with a total of three convex portions 9c that protrude radially outward from the outer circumferential surface of the upper portion 9b and are spaced equally apart in the circumferential direction. Note that the outer peripheral surface portion of the upper portion 9b adjacent to the convex portion 9c in the circumferential direction is recessed inward in the radial direction with respect to the convex portion 9c. Therefore, in this specification and the like, the outer circumferential surface portion of the upper portion 9b adjacent to the convex portion 9c in the circumferential direction will be referred to as the recessed portion 9d. Further, the outer diameter of the convex portion 9c is larger than the inner diameter of the upper protrusion 8j and the lower protrusion 8k, but smaller than the inner diameter of the outside air introduction port 8h.

As shown in FIG. 3, the moving member 9 of this embodiment is integrally connected to the cap body 8 by a thin weakened portion 9e during molding. During molding, the cap body 8 and the movable member 9 are placed in their respective positions, with the lower portion 9a located inside the outside air inlet 8h and the upper portion 9b protruding from the upper surface of the ceiling wall 8a, as shown in FIG. The lower outer edge of the convex portion 9c and the inner edge above the outside air inlet 8h are connected by a weakened portion 9e and are integrally connected. Then, by pressing the moving member 9 downward from above, the weakened portion 9e is broken and the convex portion 9c is made to ride over the upper projection 8j, thereby opening the outside air inlet as shown in FIGS. 1 and 2. It is possible to make it within 8 hours. Note that since the outer diameter of the convex portion 9c is smaller than the inner diameter of the outside air introduction port 8h, the moving member 9 can move in the vertical direction inside the outside air introduction port 8h. On the other hand, since the outer diameter of the convex portion 9c is larger than the inner diameter of the upper protrusion 8j and the lower protrusion 8k, the movable member 9 does not escape upward or downward from the outside air introduction port 8h.

In this embodiment, the lid 10 is made of synthetic resin, and as shown in FIG. 1, includes a top wall 10a located above the top wall 8a, and an outer peripheral wall 10b integrally connected to the top wall 10a. It is equipped with

A seal cylinder 10c is provided on the lower surface of the top wall 10a. The seal cylinder 10c is inserted into the inside of the spout cylinder 8e and comes into airtight contact with the inner surface of the spout cylinder 8e.

An engaging recess 10d that engages with the claw portion 8m is provided on the inner peripheral surface of the lid outer peripheral wall 10b. Further, a hinge portion 10e that is integrally connected to the outer circumferential wall 8b of the cap body 8 is provided on the outer circumferential surface of the lid outer circumferential wall 10b. Although the lid 10 of this embodiment is connected integrally with the cap body 8, it may also be provided separately from the cap body 8 and detachably attached to the cap body 8 with screws or undercuts. good.

When the inner stopper 5, the check valve 6, the moving valve 7, the cap body 8, and the moving member 9 are attached to the outer layer body 3, the state is normally as shown in FIG. 1. In this state, as shown by the solid line in FIG. 2, the outer edge of the valve body portion 6d is in airtight contact with the lower surface of the stepped portion 8g. Furthermore, since the moving member 9 moves downward within the outside air inlet 8h under its own weight, the lower portion 9a comes into contact with the valve body portion 6d. The moving member 9 of this embodiment is made of synthetic resin and is not so large in size. Therefore, even when the lower portion 9a is in contact with the valve body portion 6d, the outer edge of the valve body portion 6d is in contact with the stepped portion 8g. A force that would cause it to separate from the bottom surface is not applied. Further, in this state, a gap g through which air passes is defined between the recess 9d of the moving member 9 and the outside air introduction port 8h.

Further, as will be described later, when the internal space N is in a reduced pressure state, the valve body portion 6d is elastically deformed such that the outer edge portion thereof is lowered from the inner edge portion as a starting point, as shown by the imaginary line in FIG. In this state, an air passage (communication passage) communicating from the outside air inlet 8h to the vent 3e is formed inside the cap body 8. The communication path of this embodiment passes through a gap g formed between the outside air inlet 8h and the moving member 9, passes through the gap between the outer edge of the separated valve body portion 6d and the stepped portion 8g, and passes through the communication opening 5g. It is a passageway that reaches the vent 3e via a spiral gap (or a gap formed by the notch 3f) formed between the male threaded portion 3d and the female threaded portion 8c. Note that even in a state in which the outer edge portion of the valve body portion 6d is separated from the step portion 8g, the lower portion 9a of the moving member 9 contacts the valve body portion 6d.

In a double container having such a structure, the inner space N is pressurized by pressing the body of the outer layer 3, and the pressure in the filling space S increases, so that the contents of the filling space S are , while raising the spout valve body 6e, the contents flow from the communication port 5b through the gap around the connecting piece 6f to the inside of the base 6c, pass through the inside of the spout cylinder 8e, and are poured out from the spout 8d. It will be done. Here, the above-mentioned communication path connecting the vent 3e and the outside air inlet 8h is in a non-communicating state because the outer edge of the valve body 6d is in airtight contact with the step 8g, so the internal space N The air will not leak out to the outside world. Note that the movable valve 7 in the cylindrical wall 5c is moved by its own weight and the contents flowing from the opening on the lower side of the cylindrical wall 5c when the container main body 1 is displaced to a tilted position in order to pour out the contents. , has moved to the spout valve main body 6e side (the position shown by the broken line in FIG. 1).

Thereafter, when the pressure on the outer layer body 3 is released and the trunk begins to restore its original shape, the volume of the internal space N increases, so that the internal space N enters a reduced pressure state. As a result, the valve body portion 6d is elastically deformed as shown by the imaginary line in FIG. 2, and its outer edge portion is separated from the stepped portion 8g, so that the air introduced from the outside air inlet 8h passes through the above-mentioned communication path. and is introduced into the internal space N. Thereby, the outer layer body 3 can be restored while the inner layer body 2 is deformed to reduce its volume. Further, in this state, the lower portion 9a of the movable member 9 is in contact with the valve body portion 6d, and vibration of the valve body portion 6d is suppressed, so that noise can be effectively suppressed.

Furthermore, when the pressure on the outer layer body 3 is released, the pressure in the filling space S returns to its original state and the spout valve body 6e is seated on the upper surface of the partition wall 5a. It is possible to prevent outside air from flowing into the area. Here, when the container body 1 is returned to its original upright position after dispensing the contents, the movable valve 7 moves downward due to its own weight and the pressure drop in the filling space S. As a result, a space corresponding to the movement of the movable valve 7 is formed on the upper inner side of the cylindrical wall 5c, so that the content liquid corresponding to this space is transferred from the spouting cylinder 8e to the cylindrical wall 5c. It can be pulled back inward (suck back function), and dripping from the spout tube 8e can be effectively prevented. In addition, since the moving valve 7 that has moved downward is seated at the reduced diameter lower part of the cylindrical wall 5c, it is possible to prevent outside air from flowing into the filling space S from the cylindrical wall 5c.

Incidentally, in recent years, consideration has been given to using polyethylene terephthalate resin (PET) as a material for the inner layer 2 and outer layer 3, for example, in consideration of recyclability. This material has a higher flexural modulus than low-density polyethylene (LDPE), which is often used in double containers, and has higher rigidity when used for the outer layer 3, so when the pressure on the outer layer 3 is released, the body is rapidly restored. That is, since the flow velocity of air introduced into the internal space N tends to increase when the outer layer body 3 is restored, the vibration of the valve body portion 6d tends to increase. In such a case, for example, by increasing the weight of the movable member 9 and bringing it into slightly stronger contact with the valve body 6d, the noise can be effectively suppressed even if the vibration of the valve body 6d becomes large. can be suppressed to

Although the double-container pouring cap and double-container according to the present invention have been described above with reference to specific embodiments, the present invention is not limited to such embodiments. For example, the movable member 9 in the embodiment described above has a convex portion 9c that protrudes radially outward from the outer circumferential surface of the upper portion 9b, and a recessed portion of the outer circumferential surface of the upper portion 9b adjacent to the convex portion 9c in the circumferential direction. 9d, but by recessing the outer circumferential surface of the upper portion 9b in a vertical groove shape, this recessed part is made into a recess, and the recess is adjacent to the recess in the circumferential direction and protrudes radially outward than the recess. The outer peripheral surface portion of the upper portion 9b may be a convex portion. Further, the cap body 8 and the moving member 9 are not limited to being integrally formed during molding, but may be formed as separate members from the beginning. Further, the moving member 9 may be arranged at a location other than the outside air introduction port 8h with respect to the cap body 8. Moreover, although the air valve 6a and the spout valve 6b were constructed from one member (check valve 6), these may be separated and constructed from two or more members. Further, the base portion 6c is not limited to being directly supported by the cap body 8, but may be indirectly supported by the cap body 8 via another member, for example.

1: Container body 2: Inner layer 3: Outer layer 3a: Mouth 3b: Upper mouth portion 3c: Lower mouth portion 3d: Male thread 3e: Vent hole 3f: Notch 4: Spout cap 5: Inner stopper 5a: Partition wall 5b: Content communication port 5c: Cylindrical wall 5d: Seal wall 5e: Annular recess 5f: Outer edge wall 5g: Communication opening 6: Check valve 6a: Air valve 6b: Pour valve 6c: Base 6d: Valve body Part 6e: Spout valve body 6f: Connecting piece 7: Moving valve 8: Cap body 8a: Top wall 8b: Outer peripheral wall 8c: Female threaded portion 8d: Spout 8e: Spout tube 8f: Annular recess 8g: Step 8h: Outside air inlet 8j: Upper projection 8k: Lower projection 8m: Claw portion 9: Moving member 9a: Lower portion 9b: Upper portion 9c: Convex portion 9d: Recessed portion 9e: Weakened portion 10: Lid body 10a: Top wall 10b: Outside of lid body Peripheral wall 10c: Seal tube 10d: Engagement recess 10e: Hinge portion N: Internal space S: Filling space g: Gap

Claims (5)

The outer layer body is attached to a container body comprising an inner layer body having a filling space for accommodating the contents, and an outer layer body defining an inner space between the inner layer body and having a vent communicating with the inner space. A spouting cap for a double container that allows the contents of the filling space to be poured out from the spout by pressing the spout,
a cap body that is attached to the outer layer body so as to cover the vent hole and has an outside air introduction port that communicates with the vent hole;
a base directly or indirectly supported by the cap body inside the cap body; one end connected to the base and the other end movable with respect to the base; comes into airtight contact with the inner surface of the cap body to block air flow between the vent and the outside air inlet, while when the internal space is in a reduced pressure state, the other end of the cap body an air valve having a valve body part separated from the inner surface and allowing air to flow between the ventilation port and the outside air introduction port;
The cap is movable within the outside air inlet, is separated from the inner circumferential surface of the outside air inlet, is not connected to the cap body, and moves with its own weight toward the valve body. A dispensing cap for a double container, comprising a movable member that is always in contact with the dispensing member. The moving member has a convex portion that protrudes radially outward, and a concave portion adjacent to the convex portion in the circumferential direction,
The cap main body includes a lower protrusion that protrudes radially inward from an inner circumferential surface of the outside air inlet and engages with the convex portion to prevent the movable member from coming out downwardly with respect to the outside air inlet. The spouting cap for a double container according to claim 1. The moving member has a convex portion that protrudes radially outward, and a concave portion adjacent to the convex portion in the circumferential direction,
The cap main body includes an upper protrusion that protrudes radially inward from an inner circumferential surface of the outside air inlet and engages with the convex portion to prevent the movable member from coming out upwardly with respect to the outside air inlet. The spouting cap for a double container according to claim 1 or 2. The cap body and the movable member are made of synthetic resin, and have a weakened portion that integrally connects the cap body and the movable member during molding. Pour cap for heavy containers. A double container comprising the container body and the double container spout cap according to any one of claims 1 to 4.

Images