JP6775370B2 - Double container - Google Patents

Description

The present invention includes an inner layer body having a filling space capable of accommodating the contents, an outer layer body containing the inner layer body inside, and a pouring cap having an injection port leading to the filling space and attached to the mouth of the outer layer body. It relates to a double container provided with.

In recent years, in a container in which a pouring cap is attached to a container body for accommodating contents, for example, as shown in Patent Document 1, a double container (derami container) in which the container body is composed of an inner layer body and an outer layer body. , Also called a laminated peeling container) is used. A flexible outer layer is used for this type of container, and the outer layer is provided with a vent for taking in air in an internal space located between the outer layer and the inner layer. Further, the pouring cap is provided with an air valve that prevents air from leaking from the internal space to the outside world, while allowing air to be introduced from the outside world to the internal space when the internal space is decompressed.

According to the double container having such a structure, the internal space is pressurized by pressing the outer layer body, whereby the pressure in the filling space is increased and the contents can be poured out. Further, if the pressure on the outer layer body is released, the internal space is depressurized with the restoration of the outer layer body, whereby air is introduced from the vent to the inner space, and only the inner layer body can be reduced in volume and deformed. That is, there is an advantage that the independence of the container is maintained even if the content is reduced. Further, since the contents can be poured out without replacing with the outside air, there is an advantage that the quality of the contained contents is less likely to deteriorate. For this reason, this type of container is being widely used as a suitable container for storing seasonings such as soy sauce, sauce, mirin, and cooking liquor, and cosmetics such as shampoo, conditioner, liquid soap, and lotion.

JP 2011-31932

As shown in Patent Document 1, the above-mentioned injection cap is provided with an air valve inside the cap body attached to the outer layer body. The cap body is provided with an outside air inlet leading to the vent of the outer layer body, and the air valve normally abuts on the back surface of the cap body to close the communication passage connecting the vent and the outside air inlet. On the other hand, when the internal space is reduced in pressure, it is configured to separate from the back surface of the cap body and release the communication passage.

By the way, depending on the amount of air introduced into the internal space, the flow velocity, etc., the air valve separated from the back surface of the cap body may vibrate and make a noise.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a double container capable of effectively suppressing noise caused by an air valve.

The present invention comprises an inner layer having a filling space capable of accommodating the contents, an outer layer having a vent penetrating the mouth portion and having an inner space communicating with the inner layer between the inner layers, and the outer layer. A double container having a spout leading to a filling space and a spout cap that surrounds the vent and is attached to the spout.
The pouring cap is
A cap body having an outside air inlet leading to the vent and a communication passage for air to pass between the vent and the outside air inlet.
It extends from the inside to the outside in the radial direction, the inner edge is directly or indirectly supported by the cap body, and the outer edge normally abuts on the back surface of the cap body to close the communication passage. An air valve having a thin-walled portion that separates from the back surface of the cap body and releases the communication passage when the internal space is reduced in pressure.
The outer end of the thin-walled portion faces the back surface of the cap body in the radial direction, the outer end is directly or indirectly supported by the cap body, and the inner end abuts on a part of the outer edge of the cap. It has an elastic piece that limits the separation of the outer edge from the back surface of the main body .
The outer edge portion of the air valve is arranged between the back surface of the cap body and the elastic piece, and a part of the outer edge portion is normally connected to the back surface of the cap body and the inner end portion of the elastic piece. When the internal space is reduced in pressure, the elastic piece flexes in a direction in which the inner end portion is in contact with a part of the outer edge portion and the inner end portion separates from the back surface of the cap body. No is a double container.

The pouring cap includes a partition wall that covers the mouth portion, a communication port for contents that penetrates the partition wall and communicates the filling space and the spout port, and the vent port and the outside air introduction port that penetrate the partition wall. Has an inner plug with an air communication port to communicate with
It is preferable that the elastic piece has an outer end portion connected to the partition wall and is provided inside, directly above or directly below the air communication port.

The thin part has a donut plate shape,
The elastic piece abuts on the outer edge portion, and the direction in which the outside air introduction port is located is 0 ° from the central axis of the thin wall portion, and the range of 90 ° to 270 ° is forward around the central axis. When the region and the rest are the rear regions, it is preferable that at least a plurality of regions are provided in the front region.

It is preferable that six or eight elastic pieces are provided at equal angles around the central axis from the front region to the rear region.

The outer edge portion is preferably thicker than the thin wall portion.

The pouring cap in the double container of the present invention normally abuts on the back surface of the cap body to close the communication passage through which air passes, while when the internal space is reduced in pressure, it separates from the back surface of the cap body and the communication passage. An air valve having a thin-walled portion for releasing the cap body and an air valve provided so as to face the back surface of the cap body, and the inner end portion abuts on a part of the thin-walled portion of the air valve to limit the separation from the back surface of the cap body. It has an elastic piece. That is, since the vibration of the air valve is suppressed by the elastic piece, the noise can be effectively suppressed. In addition, the air valve at the portion where the elastic piece does not abut can be separated from the back surface of the cap body, and the portion where the elastic piece abuts can also separate while bending the elastic piece, so that the air to the internal space can be separated. The introduction of is sufficiently secured.

It is sectional drawing in the side view which showed the periphery of the pouring cap about one Embodiment of the double container according to this invention. It is a top view of the inner plug shown in FIG. It is a top view schematically showing the positional relationship between the outside air inlet and the elastic piece. It is a figure which shows typically the state which the elastic piece which is arranged to be offset in the circumferential direction is rotated relative to the outside air inlet while maintaining the overall arrangement.

Hereinafter, an embodiment of a double container according to the present invention will be described with reference to FIG. In the present specification and the like, the "up" direction and the "down" direction mean that the outer layer body (reference numeral 3) is located below and the lid body (reference numeral 9) is located above as shown in FIG. The direction in.

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

The inner layer 2 is provided with a filling space S inside which the contents can be accommodated. The inner layer 2 of the present embodiment is made of a thin synthetic resin and is provided so as to be deformable in volume reduction.

The outer layer body 3 includes a tubular mouth portion 3a extending along the central axis O. In the mouth portion 3a of the present embodiment, the lower portion 3c is formed to have a larger diameter than the upper portion 3b whose upper end opens. Further, a male screw portion 3d is provided on the outer peripheral surface of the upper portion 3b. Further, the upper portion 3b is provided with a vent 3e extending in the radial direction and penetrating the upper portion 3b, and a male screw portion 3d extending in the vertical direction is provided on the outer peripheral surface where the vent 3e opens. A notch 3f for dividing is provided. Although not shown, a tubular body portion and a bottom portion that closes the lower end of the body portion are provided below the mouth portion 3a. Further, the outer layer body 3 of the present embodiment is made of synthetic resin, and the body portion has flexibility.

Further, an internal space N leading to the vent 3e is formed between the inner layer 2 and the outer layer 3.

The inner layer body 2 and the outer layer body 3 in the present embodiment are formed by laminating synthetic resins having low compatibility with each other so as to be peelable. As the synthetic resin constituting the inner layer 2, a nylon resin (PA), an ethylene vinyl alcohol copolymer resin (EVOH), or a modified polyolefin resin (for example, "Admer" (registered trademark) manufactured by Mitsui Chemicals Co., Ltd.) shall be adopted. Can be done. Further, as the synthetic resin constituting the outer layer body 3, for example, polyethylene resin (PE) such as low density polyethylene (LDPE) and high density polyethylene resin (HDPE) can be adopted. 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, a test tubular preform in which the synthetic resin material of the inner layer 2 and the synthetic resin material of the outer layer 3 are laminated is prepared, and this preform is formed by biaxially stretched blow molding, or the inner layer is formed. It is also possible to use a body in which the body and the outer layer are individually formed, and then the inner layer is arranged inside the outer layer. Further, although not shown, one or a plurality of adhesive bands extending in the vertical direction and partially joining the inner layer 2 and the outer layer 3 between the inner layer 2 and the outer layer 3. May be provided.

The inner plug 5 includes a partition wall 5a located above the mouth portion 3a and closing the filling space S. A communication port 5b for contents that penetrates the partition wall 5a is provided in the central portion of the partition wall 5a. Further, on the side of the communication port 5b for contents, a tubular wall 5c is provided which has a cylindrical shape as a whole and whose lower part has a reduced diameter with respect to the upper part.

Further, on the radial outer side of the content communication port 5b and the tubular wall 5c, an annular seal wall 5d that is in liquid-tight contact with the inner layer 2 is provided on the lower surface of the partition wall 5a, and the upper surface of the partition wall 5a is provided with an annular seal wall 5d. An annular recess 5e with an opening at the top is provided. Further, the partition wall 5a is provided with an outer edge wall 5f extending upward from the outer edge of the partition wall 5a on the radial outer side of the recess 5e on the upper surface thereof.

The connecting portion between the partition wall 5a and the outer edge wall 5f is provided with a hole (air communication port) 5g that penetrates the partition wall 5a. A thin plate-shaped elastic piece 5h is provided above the air communication port 5g as shown in the partially enlarged view of FIG. The outer end portion 5j of the elastic piece 5h is integrally connected to the outer edge wall 5f provided on the partition wall 5a, and the elastic piece 5h can be flexed and deformed so that the inner end portion 5k moves up and down. Further, as shown in FIG. 2, six air communication ports 5g and six elastic pieces 5h are provided around the central axis O at equal angles.

The inner plug 5 of the present embodiment can be obtained by molding a synthetic resin such as polypropylene (PP) in a mold, but when an elastic piece 5h is provided above the air communication port 5g, the inner plug 5 can be obtained. The lower surface of the elastic piece 5h that is undercut by the partition wall 5a can be formed by a lower mold using the air communication port 5g. That is, when molding the elastic piece 5h, it is not necessary to provide a slide or the like in the mold, and the elastic piece 5h can be formed by a mold that moves in the vertical direction, so that the structure of the mold can be simplified and the shape at the time of molding can be simplified. Variations can also be suppressed. As will be described later, the elastic piece 5h may be provided inside the air communication port 5g or directly below the air communication port 5g. In these cases, the air communication port 5g is also used. It is possible to form the elastic piece 5h with a mold that moves in the vertical direction.

The check valve 6 has an air valve 6a for regulating the flow of air and an injection valve 6b for regulating the flow of contents. The check valve 6 of the present embodiment is made of a relatively soft material such as rubber, elastomer, low density polyethylene (LDPE), or linear low density polyethylene (LLDPE).

The air valve 6a has a tubular shape centered on the central axis O, and has a base portion 6c whose lower end is supported by a recess 5e. Further, on the radial outer side of the base portion 6c, a donut plate-shaped thin-walled portion 6d that is elastically deformable around the central axis O is provided, and the inner edge portion of the thin-walled portion 6d is integrally connected to the base portion 6c. ing. The air valve 6a is not limited to the one in which the base portion 6c and the thin-walled portion 6d are integrally connected as in the present embodiment. For example, the base portion and the thin-walled portion are formed separately, and the inner edge portion of the thin-walled portion is the base portion. It may be fitted. Further, the outer edge of the thin portion 6d is provided with an outer edge portion 6e that is thicker than the thin portion 6d.

The discharge valve 6b is located above the content communication port 5b and the tubular wall 5c, and sits on the partition wall 5a to close the content communication port 5b, while part of the tubular wall 5c is released. It includes a plate-shaped dispense valve main body 6f to be left in place, and a connecting piece 6 g that elastically connects the dispense valve main body 6f and the base portion 6c.

The moving valve 7 is arranged in the tubular wall 5c, and is provided so as to move along the inner peripheral surface of the tubular wall 5c in response to a change in the posture of the container body 1. As shown in FIG. 1, the moving valve 7 sits on the reduced diameter lower part of the tubular wall 5c when the container body 1 is in the upright posture, and does not communicate between the tubular wall 5c and the filling space S. It is in a state.

The cap body 8 includes a top wall 8a located above the check valve 6 and an outer peripheral wall 8b that is integrally connected to the outer edge of the top wall 8a and surrounds the mouth portion 3a. The outer edge wall 5f of the inner plug 5 is fitted and held on the inner surface of the outer peripheral wall 8b. The cap body 8 of the present embodiment is made of synthetic resin.

At the central portion of the top wall 8a, a pouring cylinder 8d is provided which extends upward from the edge of the hole penetrating the top wall 8a and whose upper opening is the pouring outlet 8c of the contents. Further, a recess 8e having an opening at the bottom is provided on the lower surface of the top wall 8a. As shown in FIG. 1, the recess 8e supports the upper end portion of the base portion 6c whose lower end portion is supported by the recess 5e of the inner plug 5. Further, as described above, since the outer edge wall 5f of the inner plug 5 is fitted and held on the inner surface of the cap body 8, the inner edge portion of the thin-walled portion 6d described above is capped via the inner plug 5 and the base portion 6c. It can be said that it is indirectly supported by the main body 8. Further, on the lower surface of the top wall 8a, directly above the elastic piece 5h, as shown in the partially enlarged view of FIG. 1, a step portion 8f with which the outer edge portion 6e of the air valve 6a abuts is provided. In the present embodiment, in a state where the upper surface of the outer edge portion 6e is in contact with the lower surface of the step portion 8f, the lower surface of the outer edge portion 6e is in contact with the upper surface of the inner end portion 5k of the elastic piece 5h.

Further, the top wall 8a is provided with an outside air introduction port 8g penetrating the front and back surfaces thereof. Here, between the outside air introduction port 8g and the ventilation port 3e, it is formed from the air communication port 5g via the notch 3f or between the air communication port 5g and the male screw portion 3d and the female screw portion 8j. A communication passage T is provided via a spiral gap to be formed. It should be noted that the provision of the notch 3f facilitates the flow of air passing through the communication passage T, but this may be omitted. Further, a claw portion 8h for holding the lid 9 is provided on the outer edge portion of the top wall 8a.

The outer peripheral wall 8b is provided with a female threaded portion 8j that fits the male threaded portion 3d on its inner peripheral surface. Further, the lower end portion of the outer peripheral wall 8b is in airtight contact with the lower portion 3c in a state where the cap body 8 is attached to the mouth portion 3a.

The lid 9 includes a top wall 9a located above the top wall 8a and a lid outer peripheral wall 9b integrally connected to the top wall 9a.

On the lower surface of the top wall 9a, a seal cylinder 9c that is inserted inside the dispensing cylinder 8d and that is in airtight contact with the inner surface of the dispensing cylinder 8d is provided.

An engaging recess 9d that engages with the claw portion 8h is provided on the inner peripheral surface of the outer peripheral wall 9b of the lid. Further, on the outer peripheral surface of the outer peripheral wall 9b of the lid, a hinge portion 9e that is integrally connected to the outer peripheral wall 8b of the cap body 8 is provided on the outer side in the radial direction of the outside air introduction port 8g. Although the lid 9 of the present 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 configuration, the internal space N is pressurized by pressing the body portion of the outer layer body 3, which increases the pressure of the filling space S, so that the contents of the filling space S are While raising the pouring valve main body 6f, it flows from the content communication port 5b through the gap around the connecting piece 6g into the inside of the base 6c, and is poured out from the pouring outlet 8c through the inside of the pouring cylinder 8d. Is done. Here, the communication passage T connecting the ventilation port 3e and the outside air introduction port 8g is closed because the outer edge portion 6e of the air valve 6a abuts on the step portion 8f, so that the air in the internal space N leaks to the outside world. There is no such thing. The moving valve 7 in the tubular wall 5c depends on its own weight or the contents flowing in from the opening on the lower side of the tubular wall 5c in a state where the container body 1 is displaced to the tilted posture in order to eject the contents. , It has moved to the 6f side of the discharge valve body (the position shown by the broken line in FIG. 1).

After that, by returning the container body 1 to the upright posture while releasing the pressure on the outer layer 3, the pressure in the filling space S returns to the original state and the discharge valve body 6f is seated on the upper surface of the partition wall 5a. It is possible to prevent the inflow of outside air from the content communication port 5b into the filling space S. Further, the mobile valve 7 moves downward due to its own weight or a pressure drop in the filling space S, whereby a space corresponding to the movement of the mobile valve 7 is formed inside the tubular wall 5c. Therefore, the content liquid corresponding to this space can be pulled back from the pouring cylinder 8d into the tubular wall 5c (sackback function), and dripping can be effectively prevented. Since the moving valve 7 that has moved downward is seated on the reduced diameter lower portion of the tubular wall 5c, it is possible to prevent outside air from flowing from the tubular wall 5c into the filling space S. Here, in the air valve 6a, the portion of the outer edge portion 6e that the elastic piece 5h does not abut with can be separated from the step portion 8f, and the portion that the elastic piece 5h abuts also bends the elastic piece 5h. It is possible to separate from the stepped portion 8f. Therefore, when the internal space N is depressurized with the restoration of the outer layer body 3, the air entering from the outside air introduction port 8g passes through the gap between the outer edge portion 6e separated from the step portion 8f and the step portion 8f for air. It is introduced into the internal space N via the communication port 5g and the ventilation port 3e. As a result, the outer layer 3 can be restored while the inner layer 2 is reduced in volume and deformed. Further, since the elastic piece 5h is in contact with the outer edge portion 6e, the vibration of the air valve 6a is suppressed, so that the noise can be effectively suppressed.

By the way, in the embodiment shown in FIGS. 1 and 2, six elastic pieces 5h are provided at an equal angle about the central axis O, but as shown in FIG. 3A, the elastic piece 5h is 1. Sound noise can be suppressed even in the case of individual pieces. The elastic piece 5h in FIG. 3A is located in the 180 ° direction when the direction in which the outside air introduction port 8g is located is the 0 ° direction with the central axis O as the starting point, but the outside air introduction port 8g On the other hand, when the elastic piece 5h was confirmed by rotating it relatively around the central axis O, it was possible to suppress the sound noise regardless of the position in any direction. Further, the outer layer body 3 was restored without any problem regardless of the position in any direction. Here, the position of the elastic piece 5h in the 180 ° direction means the position of the elastic piece 5h in the center of the circumferential width, and also in the following description, the position of the elastic piece 5h in the center of the circumferential width. Is the standard.

As a result of further studies, as shown in FIG. 3 (b), the noise when two elastic pieces 5h are provided in the 0 ° direction and the 180 ° direction can be suppressed as compared with the case of FIG. 3 (a). However, when four are provided in the 45 ° direction, 135 ° direction, 225 ° direction, and 315 ° direction as shown in FIG. 3C, and in the 45 ° direction, 90 as shown in FIG. 3D. When six pieces were provided in the ° direction, 135 ° direction, 225 ° direction, 270 ° direction, and 315 ° direction, it was possible to further suppress the noise. The elastic pieces 5h shown in FIGS. 3 (b) to 3 (d) were also confirmed by rotating the elastic piece 5h with respect to the outside air inlet 8g as a whole, but almost no change was observed in the result of the sounding. No effect was observed on the restoration of the outer layer 3.

By the way, as shown in FIG. 4A, when seven elastic pieces 5h are provided in the 45 ° direction, 90 ° direction, 135 ° direction, 180 ° direction, 225 ° direction, 270 ° direction, and 315 ° direction, When the elastic piece 5h was rotated as a whole and the state of noise was confirmed, a change was observed depending on the position with respect to the outside air introduction port 8g. Explaining this point with reference to FIGS. 4A to 4F, the range of 90 ° to 270 ° (including 90 ° and 270 °) around the central axis O is defined as the front region F, and the rest (0 °). ~ 90 ° ~ 270 ° ~ 360 °) is the rear region R, and at the positions shown in FIGS. 4 (d) to (f), the sound is suppressed substantially in the same manner as in FIGS. 3 (c) to (d). However, at the positions shown in FIGS. 4A to 4C, it was possible to further suppress the noise. That is, in order to suppress the sounding, it can be said that it is more effective to provide the elastic piece 5h in the front area F than in the rear area R. In addition, in the cases of FIGS. 4A to 4F, the restoration of the outer layer 3 was also good.

In this way, it is possible to suppress the noise of the air valve 6a by providing at least one elastic piece 5h, but when a plurality of elastic pieces 5h are provided in the front region F as shown in FIG. 3C or the like. Can further suppress the noise.

Then, as shown in FIG. 3 (e), when eight elastic pieces 5h are provided around the central axis O at an equal angle, at any position where the elastic pieces 5h are rotated as a whole with respect to the outside air introduction port 8g. Even if there was, no noise was observed. Further, as shown in FIG. 3 (f), no sound was generated even when six elastic pieces 5h were provided around the central axis O at an equal angle. From this, it can be said that it is most preferable to provide 6 or 8 elastic pieces 5h at an equal angle around the central axis O in order to suppress the noise of the air valve 6a. In the case of FIG. 3E as well, the restoration of the outer layer body 3 was good, but as the number of elastic pieces 5h increased, the outer edge portion 6e became difficult to separate from the step portion 8f, and the restoration of the outer layer body 3 was performed. May affect. Therefore, in consideration of both suppressing the noise of the air valve 6a and restoring the outer layer body 3, it is particularly preferable to provide six elastic pieces 5h around the central axis O at an equal angle.

The double container according to the present invention is not limited to the embodiments described so far, and may be modified in various ways within the scope of the claims, or may have other configurations added. Good. For example, the thin portion 6d of the air valve 6a in the present embodiment is integrally connected to the base portion 6c of the check valve 6 provided separately from the cap body 8, and is indirectly supported by the cap body 8. However, the cap body 8 may be provided with a portion corresponding to the base portion 6c so as to be directly supported by the cap body 8. Further, the elastic piece 5h is integrally connected to the partition wall 5a of the inner plug 5 provided separately from the cap body 8 via the outer edge wall 5f, and is indirectly supported by the cap body 8. However, it is also possible to provide the cap body 8 with a portion corresponding to the elastic piece 5h so that the cap body 8 is directly supported by the cap body 8. Further, the elastic piece 5h of the present embodiment is provided directly above the air communication port 5g by the outer edge wall 5f extending upward from the partition wall 5a, but by providing it directly on the partition wall 5a, the air communication port is provided. It may be provided inside 5 g, or may be provided directly below the air communication port 5 g by extending the outer edge wall 5f upward from the partition wall 5a. Further, the portion where the elastic piece 5h comes into contact with the thin-walled portion 6d may be a radial intermediate portion of the thin-walled portion 6d located radially inside the outer edge portion 6e. Further, although the outer edge portion 6e of the air valve 6a is in contact with the stepped portion 8f of the cap body 8, the lower surface of the top wall 8a may be contacted without providing the stepped portion 8f.

1: Container body 2: Inner layer 3: Outer layer 3a: Mouth 3b: Upper part 3c: Lower part 3d: Male thread 3e: Vent 3f: Notch 4: Dispensing cap 5: Inner plug 5a: Partition 5b: Communication port for contents 5c: Cylindrical wall 5d: Seal wall 5e: Recess 5f: Outer edge wall 5g: Communication port for air 5h: Elastic piece 5j: Outer end 5k: Inner end 6: Check valve 6a: Air valve 6b: Outlet valve 6c: Base 6d: Thin wall 6e: Outer edge 6f: Outlet valve body 6g: Connecting piece 7: Moving valve 8: Cap body 8a: Top wall 8b: Outer wall 8c: Outlet 8d: Outlet Cylinder 8e: Recess 8f: Step 8g: Outside air introduction port 8h: Claw 8j: Female thread 9: Lid 9a: Top wall 9b: Lid outer wall 9c: Seal cylinder 9d: Engagement recess 9e: Hinge F: Front Area N: Internal space O: Central axis R: Rear area S: Filling space T: Continuous passage

Claims (5)

An inner layer having a filling space capable of accommodating the contents, an outer layer having a vent penetrating the mouth portion and having an internal space communicating with the vent between the inner layers, and an outer layer leading to the filling space. A double container having a spout and a spout cap that surrounds the vent and is attached to the spout.
The pouring cap is
A cap body having an outside air inlet leading to the vent and a communication passage for air to pass between the vent and the outside air inlet.
It extends from the inside to the outside in the radial direction, the inner edge is directly or indirectly supported by the cap body, and the outer edge normally abuts on the back surface of the cap body to close the communication passage. An air valve having a thin-walled portion that separates from the back surface of the cap body and releases the communication passage when the internal space is reduced in pressure.
The outer end of the thin-walled portion faces the back surface of the cap body in the radial direction, the outer end is directly or indirectly supported by the cap body, and the inner end abuts on a part of the outer edge of the cap. It has an elastic piece that limits the separation of the outer edge from the back surface of the main body .
The outer edge portion of the air valve is arranged between the back surface of the cap body and the elastic piece, and a part of the outer edge portion is normally connected to the back surface of the cap body and the inner end portion of the elastic piece. When the internal space is reduced in pressure, the elastic piece flexes in a direction in which the inner end portion is in contact with a part of the outer edge portion and the inner end portion separates from the back surface of the cap body. No double container. The pouring cap includes a partition wall that covers the mouth portion, a communication port for contents that penetrates the partition wall and communicates the filling space and the spout port, and the vent port and the outside air introduction port that penetrate the partition wall. Has an inner plug with an air communication port to communicate with
The double container according to claim 1, wherein the elastic piece has an outer end portion connected to the partition wall and is provided inside, directly above, or directly below the air communication port. The thin part has a donut plate shape,
The elastic piece abuts on the outer edge portion, and the direction in which the outside air introduction port is located is set to 0 ° from the central axis of the thin wall portion, and the range of 90 ° to 270 ° is forward around the central axis. The double container according to claim 1 or 2, wherein a plurality of containers are provided in at least the front region when the region and the rest are the rear regions. The double container according to claim 3, further comprising 6 or 8 elastic pieces at an equal angle around the central axis from the front region to the rear region. The double container according to any one of claims 1 to 4, wherein the outer edge portion is thicker than the thin wall portion.

Images