JP2022171144A - Discharge cap for double container and double container - Google Patents

Abstract

To propose a discharge cap for double container that can suppress occurrence of noise caused by air valves, and a double container.SOLUTION: A discharge cap for double container 4 includes a cap body 8 which has an outside air introduction port 8 g for introducing outside air and a ventilation path T for communicating the outside air introduction port 8 g and the vent port 3 d with an outer layer body 3, an internal plug 5 having a content liquid communication port 5b for communicating with storage space S and the discharge opening 8d, a base part 6c held by at least either the cap body 8 or the internal plug 5 and a non-return valve 6 having a discharge valve 6a elastically deformably supported on the base part 6c, the non-return valve 6 has an elastically deformable connecting piece 6f, of which one end is integrally connected to the base part 6c, and a valve body 6 g to which the other end of the connecting piece 6f is integrally connected and which can be in touch with and separate from the outer edge of the outside air introduction port 8 g, and blocks air flow from a vent hole 3d to the outside air introduction port 8 g while allowing air flow from the outside air introduction port 8 g toward the vent hole 3 d.SELECTED DRAWING: Figure 1

Description

The present invention is a pouring cap for a double container that is attached to a container body that has an inner layer body for containing a content liquid and an outer layer body for housing the inner layer body inside, and that allows the content liquid to be poured out as the outer layer body is pressed. , and a double container in which the pouring cap is attached to the container body.

In recent years, as a container in which a pouring cap is attached to a container body for containing a content liquid, a double container using a container body composed of an inner layer body and an outer layer body, as shown in Patent Documents 1 and 2, for example, has been developed. Also called a de-lamination container or delamination container) is used. This type of outer layer body has flexibility and is constructed so that air can be taken into the internal space formed between the inner layer body and the inner layer body through through-holes (air vents) penetrating through the front and back. . The spout cap is provided with an air valve that prevents air from leaking from the internal space to the outside while permitting the introduction of air from the outside into the internal space when the internal space is decompressed.

According to such a double container, the inner space is pressurized by pressing the outer layer body, thereby increasing the pressure in the containing space and allowing the content liquid to be poured out. When the pressure on the outer layer body is released, the inner space is decompressed as the outer layer body is restored, and air is introduced into the inner space through the air vents, so that only the inner layer body can be reduced and deformed. That is, there is an advantage that the container can maintain its self-sustainability even when the content liquid is reduced. In addition, since the content liquid can be poured out without being replaced with outside air, there is also the advantage that quality deterioration of the accommodated content liquid is less likely to occur. For this reason, this type of container is being widely used as suitable for containing seasonings such as soy sauce, sauce, mirin, and cooking sake, and cosmetics such as shampoo, rinse, liquid soap, and lotion.

As shown in Patent Documents 1 and 2, conventional pouring caps for double containers are provided with a cap body attached to the outer layer body, and the cap body is provided with outside air leading to the vent of the outer layer body. It has a mouth. The air valve is formed in the shape of an elastically deformable thin plate and provided inside the cap body. Here, the outer edge of the air valve is in contact with the rear surface of the cap body so as to cover the outside air inlet from below. For this reason, normally air circulation between the vent and the outside air inlet is blocked, but when the internal space is decompressed, the outer edge of the air valve separates from the back surface of the cap body, so outside air is introduced. Air can be circulated from the opening toward the vent.

Japanese Unexamined Patent Application Publication No. 2011-31932 JP 2014-24569 A

By the way, depending on the amount and flow velocity of the air introduced into the internal space, the air valve separated from the back surface of the cap body may vibrate and generate noise. For this reason, in Patent Document 2, the occurrence of noise is suppressed by providing a convex portion that comes in contact with the outer edge portion of the air valve from the outside in the radial direction to suppress the vibration of the air valve.

On the other hand, it can be said that one of the causes of the noise of the air valve is that it is in the form of a thin plate that is easily vibrated. Therefore, there is a possibility that noise generation can be suppressed by changing the shape of the air valve.

The present invention has been made in view of such circumstances, and aims to provide a pouring cap for a double container and a double container that can suppress the generation of noise caused by an air valve. aim.

The present invention is attached to a container body comprising an inner layer body having a storage space for containing a content liquid, and an outer layer body having a vent opening communicating with the inner space and defining an inner space between the inner layer body. , a pouring cap for a double container that allows the liquid contained in the containing space to be poured out from the pouring port by pressing the outer layer body,
a ventilation path mounted on the outer layer body covering the ventilation port, having an outside air introduction port for introducing outside air and the outlet, and communicating the outside air introduction port and the ventilation port between the outer layer body; a cap body having
an intermediate plug having a partition wall closing the accommodation space, and a content liquid communication port provided in the partition wall for communicating the accommodation space and the pouring port;
a base portion held by at least one of the cap main body and the inner plug; a check valve having a pouring valve for blocking the flow of the content liquid from the outlet toward the communication port for the content liquid,
The check valve includes an elastically deformable connecting piece, one end of which is integrally connected to the base, and an elastically deformable connecting piece whose other end is integrally connected to contact the outer edge of the outside air inlet. a valve body that can be brought into contact with and separated from the valve body, and allows air to flow from the outside air introduction port toward the ventilation port while blocking air flow from the ventilation port toward the outside air introduction port. It is a spout cap for a container.

It is preferable that a portion of the valve body, which abuts on the outer edge of the outside air inlet, has a spherical shape.

The valve body preferably has a cylindrical wall and a closing wall provided inside the cylindrical wall.

It is preferable that the partition wall has a guide portion that is located inside the cylinder wall and guides the valve body when the valve body separates.

Either one of the cap main body and the inner plug is inserted into a first recess provided in the other of the cap main body and the inner plug, and the first recess defines the circumferential position of the inner plug with respect to the cap main body. It is preferable to have convex portions.

Either one of the inner plug and the check valve is inserted into a second recess provided in the other of the inner plug and the check valve to define the circumferential position of the check valve with respect to the inner plug. It is preferable to have a second convex portion that

The present invention also provides a double container composed of the container main body and any of the double container pouring caps described above.

The pouring cap for a double container of the present invention comprises an elastically deformable connecting piece, one end of which is integrally connected to the base of the check valve, and the other end of the connecting piece which is integrally connected to introduce outside air. a valve body capable of abutting and separating from the outer edge of the port, and allowing air flow from the outside air inlet to the vent while blocking air from flowing from the vent to the outside air inlet; I have. That is, the function of an air valve can be achieved by such a connecting piece and valve body. In addition, since it is not in the form of a thin plate that easily vibrates, it is possible to suppress the generation of noise.

1 is a partially enlarged cross-sectional side view showing an embodiment of a double container according to the present invention; FIG. Regarding the check valve shown in FIG. 1, (a) is a plan view and (b) is a side view. It is the figure which showed the positional relationship of the extraction|pouring cap shown in FIG. 1, an inside plug, and a non-return valve. (a) is an arrow view along arrow A shown in FIG. 3, and (b) is an arrow view along arrow B shown in FIG.

An embodiment of the double container according to the present invention will be described below with reference to FIG. Note that the vertical direction in this specification and the like is a direction along the illustrated axis O (the axis of the container body 1, which will be described later). Further, the radial direction is a direction orthogonal to the axis O within a plane perpendicular to the axis O, and the circumferential direction is a direction in which the axis O is the center of rotation within this plane.

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

The inner layer body 2 is capable of volume reduction and deformation, and has an accommodation space S capable of accommodating a content liquid therein.

The outer layer body 3 has a cylindrical opening 3a extending along the axis O. As shown in FIG. An annular seal portion 3b and a male screw portion 3c located above the seal portion 3b are provided on the outer peripheral surface of the mouth portion 3a. The mouth portion 3a is provided with a vent hole 3d radially penetrating the mouth portion 3a above the seal portion 3b. Further, the mouth portion 3a is provided with a notch 3e that extends vertically and divides the male screw portion 3c at a portion where the vent hole 3d opens. Although not shown, a hollow flexible body and a bottom closing the lower end of the body are provided below the mouth 3a, and the outer layer body 3 has a bottle shape. None.

An internal space N is formed between the inner layer body 2 and the outer layer body 3 to communicate with the air vent 3d.

Both the inner layer body 2 and the outer layer body 3 in this embodiment are made of polyethylene terephthalate resin (PET). By adopting polyethylene terephthalate resin, it is possible to obtain a container that is lightweight, highly transparent, and highly recyclable. In forming the container body 1 of the present embodiment, the inner preform made of polyethylene terephthalate resin for forming the inner layer 2 is placed inside the outer preform made of polyethylene terephthalate resin for forming the outer layer 3. Prepare an assembled preform assembly. Then, the bottle-shaped container body 1 is formed by subjecting the preform assembly to biaxial stretch blow molding.

The container body according to the present invention is not limited to the one described above. For example, a parison in which a synthetic resin material forming the inner layer 2 and a synthetic resin material forming the outer layer 3 are laminated, is subjected to extrusion blow molding. may be obtained by

Various synthetic resins for forming the inner layer body 2 and the outer layer body 3 can also be used. Materials employed as the inner layer body 2 include, for example, nylon resin (PA), ethylene-vinyl alcohol copolymer resin (EVOH), modified polyolefin resin, polyethylene resin (PE), polypropylene resin (PP), and the like. In addition to polyethylene resins (PE) such as low-density polyethylene (LDPE) and high-density polyethylene resin (HDPE), polypropylene resin (PP) and nylon resin (PA) are employed as the outer layer body 3 . etc. 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 a plurality of synthetic resins are superimposed so that each has a laminated structure. Alternatively, one may have a single layer structure and the other may have a laminated structure. Although not shown, one or a plurality of adhesive strips extending longitudinally between the inner layer 2 and the outer layer 3 to partially join the inner layer 2 and the outer layer 3 are provided. may be provided.

The inner plug 5 is made of synthetic resin (for example, high density polyethylene resin (HDPE)). The inner plug 5 of this embodiment includes a partition wall 5a positioned above the mouth portion 3a and closing the accommodation space S. As shown in FIG. The partition wall 5a is provided with an opening (content fluid communication port 5b) penetrating through the partition wall 5a, and a cylindrical wall 5c having a cylindrical shape as a whole and having a smaller diameter at the lower portion than at the upper portion.

The partition wall 5a is provided with an annular recess 5d that opens upward radially outward of the content liquid communication port 5b and the cylindrical wall 5c, and extends downward radially outward of the annular recess 5d. An annular seal wall 5e is provided to contact the inner layer body 2 in a liquid-tight manner. Furthermore, an outer annular wall 5f that stands upward is provided at the outer edge of the partition wall 5a. As shown in FIGS. 1 and 3, at the portion where the partition wall 5a and the outer annular wall 5f are connected, the radially outer portion of the partition wall 5a and the lower portion of the outer annular wall 5f are integrally notched. An air communication port 5g is formed and extends through both the partition wall 5a and the outer annular wall 5f. As shown in FIG. 3, a total of three air communication ports 5g are provided at intervals in the circumferential direction.

As shown in FIGS. 3 and 4(a), the outer annular wall 5f is provided with a recess (first recess 5h) formed by cutting the outer wall 5f downward from above. Although three first concave portions 5h having the same shape are provided at intervals in the circumferential direction, the intervals in the circumferential direction are uneven. That is, when the description is based on the later-described valve body 6g shown in FIG. , the second first recess 5h is provided at 130°, and the third first recess 5h is provided at 250°.

On the upper surface of the partition wall 5a, inside the outer annular wall 5f, there is provided an arc-shaped inner positioning wall 5j extending along the circumferential direction at intervals as shown in FIG. A concave portion (second concave portion 5k) is provided between the adjacent inner positioning walls 5j as shown in FIG. 4(b). Although three second recesses 5k are provided at intervals in the circumferential direction, the intervals in the circumferential direction are uneven. That is, as shown in FIG. 3, when the position where the valve body 6g is positioned with respect to the axis O is 0°, the first second recessed portion 5k is provided at 50°, and the second recessed portion 5k is provided at 50°. The second recess 5k is provided at 180° and the third second recess 5k is provided at 295°. The inner positioning wall 5j has an extension wall 5m that extends radially outward from a portion where the second second concave portion 5k is provided.

Further, as shown in FIG. 1, the inner plug 5 has a guide portion 5n positioned between the annular recess 5d and the outer annular wall 5f and extending upward from the upper surface of the partition wall 5a. The guide portion 5n of this embodiment is annular.

The check valve 6, as shown in FIG. 1, has a discharge valve 6a for regulating the flow of the content liquid and an air valve 6b for regulating the flow of air. The check valve 6 is made of, for example, rubber, elastomer, polypropylene resin (PP), low-density polyethylene (LDPE), high-density polyethylene (HDPE), or the like.

As shown in FIGS. 1 and 2, the pouring valve 6a has a base portion 6c having an annular shape centered on the axis O and having a lower end portion supported by an annular recessed portion 5d. Inside the base portion 6c in the radial direction, there is a disk-shaped member positioned above the content fluid communication port 5b and the cylindrical wall 5c as shown in FIG. A spout valve body 6d is provided which closes the mouth 5b while leaving a portion of the tubular wall 5c open. Between the base portion 6c and the pouring valve body portion 6d, there is an arcuate shape in plan view, one end of which is integrally connected to the inner peripheral surface of the base portion 6c and the other end of which is the pouring valve body portion 6d. A thin plate-like spout valve connection piece 6e is provided which is integrally connected to the outer edge of the valve. The connection piece 6e for pouring valves of this embodiment is provided in total three at intervals in the circumferential direction. That is, the extraction valve 6a of this embodiment is a so-called three-point valve. The number of spout valve connection pieces 6e can be changed as appropriate, and the spout valve 6a may be a so-called one-point valve.

The air valve 6b has a thin plate-like connecting piece (air valve connecting piece 6f) integrally connected at one end to the outer peripheral surface of the base portion 6c. A valve body 6g is provided. As shown in FIG. 2, the air valve connecting piece 6f of this embodiment has an arc shape, and the width of one end thereof is wider than that of the other portion. As shown in FIG. 3, when the position where the valve body 6g is positioned with respect to the axis O is assumed to be 0°, one end of the air valve connecting piece 6f (central portion in the width direction of one end) They are connected together at about 110° to the plane. Here, the air valve connection piece 6f of the present embodiment is provided as a pair so as to face each other with the valve body 6g interposed therebetween as shown in the figure. Thus, by extending the air valve connecting piece 6f relatively long and connecting the base portion 6c and the valve body 6g, it is possible to prevent the force when the air valve connecting piece 6f is elastically deformed from becoming excessive. can be prevented. Further, since the pair of air valve connecting pieces 6f are provided symmetrically with respect to the valve body 6g, the valve body 6g can be moved evenly.

The air valve connecting piece 6f is not limited to the one described above, and may be, for example, one that linearly connects the base portion 6c and the valve body 6g.

As shown in FIG. 1, the valve body 6g of this embodiment has a lidded tubular shape in which a hemispherical shell-shaped closing wall 6j is integrally provided at the upper end of a cylindrical tubular wall 6h. The valve body 6g is provided directly above the guide portion 5n as shown in FIG. 1, and the cylindrical wall 6h is formed with an outer diameter that is one size larger than the guide portion 5n. The air valve connection piece 6f is integrally connected to the outer peripheral surface of the cylindrical wall 6h as shown in FIG. 2(b) with respect to the valve body 6g.

Although the valve body 6g may be solid, it can be lightened by making it cylindrical with a lid. Further, the valve body 6g is not limited to a cylinder with a lid, and may be a cylinder with a bottom provided with a closing wall 6j at the lower end of the cylinder wall 6h, or a closing wall at the middle part in the vertical direction of the cylinder wall 6h. 6j may be provided. The closing wall 6j may be flat. Moreover, the valve body 6g may have a polygonal prism shape as a whole, or may have a conical shape.

Further, the check valve 6 has a convex portion (second convex portion 6k) that protrudes radially outward from the outer peripheral surface of the base portion 6c, as shown in FIG. As shown in FIGS. 3 and 4B, a total of three second protrusions 6k are provided at positions corresponding to the second recesses 5k, and each of them is configured to fit into the second recesses 5k. there is As a result, the check valve 6 is attached to the inner plug 5 in a predetermined orientation in the circumferential direction. The second convex portion 6k fitted in the second concave portion 5k provided with the extension wall 5m extends longer radially outward than the other second convex portions 6k.

In this embodiment, the movable valve 7 has a spherical shape and is arranged inside the cylindrical wall 5c. move along. As shown in FIG. 1, when the container main body 1 is in the upright position, the movable valve 7 is seated on the lower portion of the cylindrical wall 5c having a reduced diameter, thereby disconnecting the cylindrical wall 5c from the housing space S. state.

The cap body 8 is made of synthetic resin in this embodiment, and has a top wall 8a positioned above the check valve 6 and an outer annular wall extending downward from the outer edge of the top wall 8a. 5f, an upper portion of the inner layer body 2, and an outer peripheral wall 8b surrounding the mouth portion 3a. A female threaded portion 8c that fits the male threaded portion 3c is provided on the inner peripheral surface of the outer peripheral wall 8b.

The top wall 8a is provided with a pouring tube 8e that extends upward from the edge of a hole that penetrates the top wall 8a and that has an upper opening as a pouring port 8d for the liquid content. The lower surface of the ceiling wall 8a is provided with an annular recess 8f that opens downward and supports the upper portion of the base 6c. An outside air introduction port 8g penetrating through the top wall 8a is provided right above the valve body 6g on the radially outer side of the annular recessed portion 8f. An annular valve seat portion 8h extending downward from the lower surface of the ceiling wall 8a is provided at the outer edge of the outside air inlet 8g. The valve seat portion 8h of this embodiment has, at its lower end portion, a conical surface-shaped inclined portion 8j whose diameter decreases upward. are in contact with each other over the entire circumference. Further, as shown in FIG. 1, claw portions 8k for holding the lid body 9 are provided on the outer edge portion of the top wall 8a.

Further, the cap body 8 is provided with a gap (ventilation path T) leading to the ventilation port 3d inside the outer peripheral wall 8b as shown in FIG. As shown in FIG. 1, the lower inner peripheral surface of the outer peripheral wall 8b is in contact with the seal portion 3b, and airtightness is maintained between the outer peripheral wall 8b and the seal portion 3b. That is, the lower part of the air passage T is closed by the outer peripheral wall 8b and the seal portion 3b. The air passage T communicates with the upper portion of the partition wall 5a through an air communication port 5g provided in the inner plug 5. As shown in FIG. The closing wall 6j of the valve body 6g is normally in contact with the inclined portion 8j as shown, and the air passage T is not in communication with the outside air inlet 8g.

Further, the cap body 8 has a projection (first projection 8m) on the inner upper portion of the outer peripheral wall 8b, as shown in FIG. A total of three first protrusions 8m are provided at positions corresponding to the first recesses 5h as shown in FIG. As a result, the inner plug 5 is attached to the cap body 8 in a predetermined orientation in the circumferential direction.

The lid 9 is made of synthetic resin in this embodiment, and includes a top wall 9a positioned above the top wall 8a and a lid outer peripheral wall 9b integrally connected to the top wall 9a. A seal cylinder 9c is provided on the lower surface of the top wall 9a to be inserted into the pouring tube 8e and to be in airtight contact with the inner surface of the pouring tube 8e. An engaging convex portion 9d that engages with the claw portion 8k is provided on the inner peripheral surface of the outer peripheral wall 9b of the lid body. A hinge portion 9e integrally connected to the outer peripheral wall 8b of the cap body 8 is provided on the outer peripheral surface of the outer peripheral wall 9b of the lid body. Although the lid body 9 of this embodiment is integrally connected to the cap body 8, it may be provided separately from the cap body 8 and detachably attached to the cap body 8 by screws or undercuts. good.

In the double container having such a structure, the interior space N is pressurized by pressing the body of the outer layer body 3, and the pressure in the accommodation space S is thereby increased. While raising the pouring valve main body 6d, the liquid flows from the content communication port 5b through the gap around the air valve connecting piece 6f into the inside of the base 6c, and then through the inside of the pouring cylinder 8e to the pouring port. It is poured out from 8d. Here, in the air passage T described above, since the closing wall 6j of the valve body 6g is in contact with the inclined portion 8j of the valve seat portion 8h over the entire circumference, the air in the internal space N is prevented from leaking out to the outside. do not have. The movable valve 7 in the cylindrical wall 5c is moved by its own weight and the liquid flowing in from the opening on the lower side of the cylindrical wall 5c when the container body 1 is displaced to a tilted posture so as to pour out the content liquid. It has moved to the pouring valve main body 6d side (the position indicated by the dashed line in FIG. 1).

After that, when the pressure on the outer layer body 3 is released and the body portion starts to restore, the volume of the internal space N increases, so the internal space N becomes decompressed. That is, the air valve connecting piece 6f is elastically deformed so that the valve body 6g separates from the valve seat portion 8h due to the pressure difference with the outside, and a gap is formed between the closing wall 6j and the inclined portion 8j. Air is introduced from the inlet 8g. The air introduced from the outside air introduction port 8g is introduced into the internal space N through the air passage T. As shown in FIG. As a result, the outer layer body 3 can be restored while the inner layer body 2 is deformed to reduce its volume.

As described above, the conventional double-container pouring cap uses a thin plate-like air valve, which tends to vibrate itself when the air from the outside air inlet 8g passes through. In this embodiment, air passes around the relatively thick valve body 6g, so that vibration caused by noise can be suppressed.

Further, when the pressure on the outer layer body 3 is released, the pressure in the accommodation space S returns to its original state, and the spout valve main body 6d is seated on the upper surface of the partition wall 5a. Outside air can be prevented from flowing into S. Here, when the container main body 1 is displaced to the original upright posture after finishing pouring out the content liquid, the movable valve 7 moves downward due to its own weight and pressure drop in the accommodation space S. As a result, a space corresponding to the amount of movement of the movable valve 7 is formed above and inside the cylindrical wall 5c, so that the content corresponding to this space is poured out of the pipe 8e into the cylindrical wall 5c. It can be pulled back inward (suck back function), and can effectively prevent dripping from the pouring tube 8e. Since the movable valve 7 that has moved downward is seated on the lower portion of the tubular wall 5c whose diameter has been reduced, it is possible to prevent outside air from flowing into the housing space S through the tubular wall 5c.

In addition, when the valve body 6g moves up and down, there is a possibility that its posture changes during movement due to various factors (for example, the amount of air introduced into the internal space N, the flow velocity, and individual differences of each member). In this embodiment, since the guide portion 5n is positioned inside the cylindrical wall 6h, the guide portion 5n guides the valve body 6g to a predetermined orientation and position when the valve body 6g moves up and down. Therefore, the valve body 6g can be stably brought into contact with and separated from the valve seat portion 8h. Further, the outer surface of the closing wall 6j of the valve body 6g is spherical, and the inclined portion 8j of the valve seat portion 8h with which it abuts is conical. The degree of contact between the closing wall 6j and the inclined portion 8j does not change, and the function of the air valve 6b can be stabilized.

Although one embodiment of the present invention has been described above, the present invention is not limited to such a specific embodiment. Various modifications and changes are possible within the range of. Moreover, the effects of the above-described embodiments are merely examples of the effects produced by the present invention, and do not mean that the effects of the present invention are limited to the above effects.

For example, in the present embodiment, the valve body 6g is configured to contact and separate from the annular valve seat portion 8h provided on the outer edge of the outside air inlet 8g. The valve body 6g may be brought into contact with and separated from the lower surface of the ceiling wall 8a. In the present embodiment, the first concave portion 5h is provided in the inner plug 5 and the first convex portion 8m is provided in the cap main body 8. may be provided with the first convex portion 8m. In the present embodiment, the second concave portion 5k is provided on the inner plug 5 and the second convex portion 6k is provided on the check valve 6. The check valve 6 may be provided with the second recess 5k. In addition, in the present embodiment, by making the intervals in the circumferential direction uneven when a plurality of the first concave portions 5h, the first convex portions 8m, the second convex portions 6k, and the second concave portions 5k are provided, the inner plug 5, the non-return When the valve 6 and the cap body 8 are assembled, the position in the circumferential direction is uniquely determined. The same effect can be obtained by increasing the width by one in the same way for 8m. Also, in this embodiment, the base portion 6c is held by the inner plug 5 and the cap body 8 by the annular recesses 5d and 8f, but it may be held by either one of them.

1: Container body 2: Inner layer 3: Outer layer 3a: Mouth 3b: Seal 3c: Male screw 3d: Vent 3e: Notch 4: Drain cap (drain cap for double container)
5: Inner plug 5a: Partition wall 5b: Content liquid communication port 5c: Cylindrical wall 5d: Annular recess 5e: Seal wall 5f: Outer annular wall 5g: Air communication port 5h: First recess 5j: Inner positioning wall 5k: Second concave portion 5m: extension wall 5n: guide portion 6: check valve 6a: spout valve 6b: air valve 6c: base portion 6d: spout valve body portion 6e: spout valve connection piece 6f: air valve connection piece (Connecting piece)
6g: valve body 6h: cylindrical wall 6j: closing wall 6k: second convex portion 7: movable valve 8: cap main body 8a: top wall 8b: outer peripheral wall 8c: female screw portion 8d: spout 8e: spout pipe 8f: annular Recessed portion 8g: Outside air inlet 8h: Valve seat portion 8j: Inclined portion 8k: Claw portion 8m: First convex portion 9: Lid 9a: Top wall 9b: Lid outer peripheral wall 9c: Seal tube 9d: Engaging convex portion 9e: Hinge part N: internal space O: axis line S: accommodation space T: ventilation path

Claims (7)

It is attached to a container body comprising an inner layer body having a storage space for containing a content liquid, and an outer layer body having a vent opening communicating with the inner space and defining an inner space between the inner layer body, and the outer layer body A pouring cap for a double container that pours out the content liquid of the containing space from the pouring port by pressing the
a ventilation path mounted on the outer layer body covering the ventilation port, having an outside air introduction port for introducing outside air and the outlet, and communicating the outside air introduction port and the ventilation port between the outer layer body; a cap body having
an intermediate plug having a partition wall closing the accommodation space, and a content liquid communication port provided in the partition wall for communicating the accommodation space and the pouring port;
a base portion held by at least one of the cap main body and the inner plug; a check valve having a pouring valve for blocking the flow of the content liquid from the outlet toward the communication port for the content liquid,
The check valve includes an elastically deformable connecting piece, one end of which is integrally connected to the base, and an elastically deformable connecting piece whose other end is integrally connected to contact the outer edge of the outside air inlet. a valve body that can be brought into contact with and separated from the valve body, and allows air to flow from the outside air introduction port toward the ventilation port while blocking air flow from the ventilation port toward the outside air introduction port. Spout cap for container. 2. The dispensing cap for a double container according to claim 1, wherein said valve body has a spherical portion in contact with the outer edge of said outside air inlet. 3. The pouring cap for a double container according to claim 1, wherein the valve body has a cylindrical wall and a closing wall provided inside the cylindrical wall. 4. The pouring cap for a double container according to claim 3, wherein the partition wall has a guide portion positioned inside the cylinder wall and guiding the valve body when the valve body separates. Either one of the cap main body and the inner plug is inserted into a first recess provided in the other of the cap main body and the inner plug, and the first recess defines the circumferential position of the inner plug with respect to the cap main body. The pouring cap for a double container according to any one of claims 1 to 4, which has a projection. Either one of the inner plug and the check valve is inserted into a second recess provided in the other of the inner plug and the check valve to define the circumferential position of the check valve with respect to the inner plug. The pouring cap for a double container according to any one of claims 1 to 5, which has a second protrusion that A double container comprising the container main body and the pouring cap for a double container according to any one of claims 1 to 6.

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