JP2018058643A - Double container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double container that can effectively suppress sounds caused by air valves.SOLUTION: The double container of the present invention comprises an inner layer body 2 having a filling space S, an outer layer body 3 having a vent hole 3e and forming an inner space N with the inner layer body 2 in between that communicate with the vent hole 3e, and a pouring cap 4 that has a pouring spout 8c, attached to a mouth portion 3a. The pouring cap 4 includes: a cap body 8 having a communicating passage T between the vent hole 3e and an outside air introducing port 8g; and an air valve 6a having a thin portion 6d which closes the communicating passage T under normal condition by abutting on the cap body 8, and opens the communicating passage T under the reduced pressure in the inner space N, by moving away from the cap body 8; and an elastic piece 5h extending in the circumferential direction of the thin portion 6d while protruding in the direction toward the thin portion 6d, and restricting the detachment of an outer edge portion 6e from the back surface of the cap body 8 by abutting on a part of the thin portion 6d.SELECTED DRAWING: Figure 1

Description

  The present invention includes an inner layer body having a filling space capable of accommodating the contents, an outer layer body that houses the inner layer body, a pouring cap that has a spout opening that leads to the filling space and is attached to the mouth of the outer layer body. It is related with the double container provided with.

  2. Description of the Related Art In recent years, in a container in which a dispensing cap is attached to a container body that contains contents, for example, a double container (a delami container) in which a container body is composed of an inner layer body and an outer layer body as shown in Patent Document 1 , Also referred to as a delamination container). A flexible outer layer body is used for this type of container, and the outer layer body is provided with a vent for taking air into an internal space located between the outer layer body and the inner layer body. The dispensing cap is provided with an air valve that prevents air from leaking from the internal space to the outside, while allowing air to be introduced from the outside to the internal space when the internal space is decompressed.

  According to the double container having such a configuration, the inner space is pressurized by pressing the outer layer body, whereby the pressure of the filling space is increased and the contents can be poured out. Further, if the pressure on the outer layer body is released, the inner space is decompressed as the outer layer body is restored, whereby air is introduced from the vent into the inner space and only the inner layer body can be deformed and deformed. That is, there is an advantage that the self-supporting property of the container is maintained even when the content is reduced. Moreover, since the contents can be poured out without replacing with the outside air, there is also an advantage that the quality of the stored contents hardly deteriorates. For this reason, this type of container is being widely used as a suitable container for containing seasonings such as soy sauce, sauce, miso and cooking liquor, and cosmetics such as shampoo, rinse, liquid soap and lotion.

JP 2011-31932 A

  The pouring cap mentioned above is provided with the air valve inside the cap main body with which an outer-layer body is mounted | worn, as patent document 1 shows. The cap body has an outside air introduction port that communicates with the vent of the outer layer body, and the air valve normally abuts the back surface of the cap body and closes the communication path connecting the ventilation port and the outside air introduction port. On the other hand, when the internal space is under reduced pressure, the communication passage is released away from the back surface of the cap body.

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

  An object of the present invention is to solve such problems, 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 includes an inner layer body having a filling space capable of containing contents, an outer layer body having a vent hole penetrating the mouth portion and having an inner space leading to the vent hole between the inner layer body, 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 dispensing cap is
A cap body having an outside air introduction port leading to the ventilation port and a communication path through which air passes between the ventilation port and the outside air introduction port;
While extending radially inward from the inside, the inner edge is directly or indirectly supported by the cap body, and the outer edge normally abuts the back surface of the cap body to close the communication path. An air valve having a thin portion that releases the communication passage away from the back surface of the cap body when the internal space is under reduced pressure;
While facing the back surface of the cap body across the thin-walled portion, while projecting in a direction approaching the thin-walled portion from one end supported directly or indirectly by the cap body toward the thin-walled portion And an elastic piece extending in the circumferential direction of the thin portion and contacting a part of the thin portion to limit separation of the outer edge portion from the back surface of the cap body.

The pouring cap includes a partition wall that covers the mouth portion, a communication port for contents that penetrates the partition wall to communicate the filling space and the spout port, and the ventilation port and the outside air introduction port that penetrate the partition wall. And an air plug that communicates with the air communication port.
It is preferable that the elastic piece is provided directly above the air communication port while the one end portion is connected to the partition wall.

The thin portion 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 starting from the central axis of the thin-walled portion is the 0 ° direction, and the range of 90 ° to 270 ° around the central axis is the front When the area and the remainder are the rear area, it is preferable that a plurality are provided at least in the front area.

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

  The outer edge portion is preferably thicker than the inner edge portion.

  It is preferable that the elastic piece has a convex portion at a portion that comes into contact with a part of the thin portion.

  The pouring cap in the double container of the present invention normally contacts the back surface of the cap body and closes the communication passage through which air passes. On the other hand, when the internal space is under reduced pressure, it separates from the back surface of the cap body. An air valve having a thin portion that releases the thin portion, and a thin portion that is provided opposite to the back surface of the cap body across the thin portion and that is supported directly or indirectly by the cap body toward the thin portion. And an elastic piece that extends in the circumferential direction of the thin portion while protruding in a direction approaching the portion, and that abuts against a part of the thin portion and restricts the separation of the outer edge portion from the back surface of the cap body. 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 in the portion where the elastic piece is not in contact can be separated from the back surface of the cap body, and the portion in which the elastic piece is in contact can be separated while bending the elastic piece. 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. (A) is a top view of the inner stopper shown in FIG. 1, (b) is a perspective view which follows the arrow A shown to (a). It is the top view which showed typically the positional relationship of an external air inlet and an elastic piece. It is the figure which showed typically about the state rotated relatively with respect to the external air introduction port, maintaining the whole arrangement | positioning about the elastic piece arrange | positioned in the circumferential direction. It is the perspective view which showed the modification of the elastic piece shown in FIG.2 (b). It is the perspective view which showed the further modification of the elastic piece shown in FIG.2 (b).

  Hereinafter, an embodiment of a double container according to the present invention will be described with reference to FIG. In this specification and the like, the “upward” direction and the “downward” direction refer to a state in which the outer layer body (reference numeral 3) is positioned below and the lid body (reference numeral 9) is positioned upward as shown in FIG. The direction at.

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

  The inner layer body 2 is provided with a filling space S in which contents can be accommodated. The inner layer body 2 of the present embodiment is made of a thin synthetic resin and is provided so as to be capable of volumetric deformation.

  The outer layer body 3 includes a cylindrical mouth portion 3 a extending along the central axis O. In the mouth portion 3a of the present embodiment, the lower portion 3c has a larger diameter than the upper portion 3b whose upper end is open. 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 through the upper portion 3b. The outer peripheral surface where the vent 3e is opened extends in the vertical direction and has a male screw portion 3d. A notch 3f for dividing is provided. In addition, although illustration is abbreviate | omitted, the bottom part which closes the cylindrical trunk | drum and the lower end of a trunk | drum is provided below the opening part 3a. Further, the outer layer body 3 of the present embodiment is made of a synthetic resin, and the trunk portion has flexibility.

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

  The inner layer body 2 and the outer layer body 3 in the present embodiment are formed by stacking synthetic resins having low compatibility with each other in a peelable manner. As the synthetic resin constituting the inner layer body 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, Inc.) should be adopted. Can do. Moreover, as a synthetic resin which comprises the outer layer body 3, polyethylene resin (PE) including low density polyethylene (LDPE) and high density polyethylene resin (HDPE), for example can be employ | adopted. Such inner layer body 2 and outer layer body 3 can be obtained by blow molding a parison in which a synthetic resin material forming inner layer body 2 and a synthetic resin material forming outer layer body 3 are laminated, In addition, a test tubular preform in which the synthetic resin material of the inner layer body 2 and the synthetic resin material of the outer layer body 3 are laminated is prepared, and this preform is formed by biaxial stretch blow molding. A body and an outer layer body can be formed separately, and then the inner layer body can be arranged inside the outer layer body. Although not shown in the figure, one or a plurality of adhesive bands extending in the longitudinal direction between the inner layer body 2 and the outer layer body 3 and partially joining the inner layer body 2 and the outer layer body 3 May be provided.

  The inner plug 5 includes a partition wall 5a that is located above the mouth portion 3a and closes the filling space S. In the central part of the partition wall 5a, a communication port 5b for contents penetrating the partition wall 5a is provided. Further, a cylindrical wall 5c having a cylindrical shape as a whole and having a lower diameter reduced with respect to the upper portion is provided beside the communication port 5b for contents.

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

  A connecting portion between the partition wall 5a and the outer edge wall 5f is provided with a hole (air communication port) 5g penetrating therethrough. An elastic piece 5h is provided above the air communication port 5g. As shown in FIG. 2 (a), the elastic piece 5h starts from one end 5j integrally connected to the partition wall 5a and protrudes upward from the elastic piece 5h as shown in FIG. 2 (b). It extends in the circumferential direction of the partition wall 5a and forms a thin plate. Here, extending in the circumferential direction of the partition wall 5a is not limited to the case where the partition wall 5a extends in a circular arc shape with the central axis O as the center as shown in the figure. Including the case of extending in a straight line. The elastic piece 5h having such a thin plate shape can be bent and deformed so that the other end portion 5k positioned above moves up and down. Further, as shown in FIG. 2A, six air communication ports 5g and six elastic pieces 5h are provided around the central axis O at equal angles. As shown in FIG. 5, the elastic piece starts from one end 5j integrally connected to the partition wall 5a and bends upward therefrom (inverted L-shape when viewed from the side). It may extend toward the circumferential direction of the partition wall 5a while protruding. Moreover, the elastic piece may be provided with a convex part 5m on the upper surface of the other end part 5k, as in the elastic piece 5h "shown in FIG. The thickness of the elastic piece may be substantially the same as shown in Fig. 2 (b) and Fig. 5, or as shown in Fig. 6. Thus, you may make it the one end part 5j side thicker than the other end part 5k side.

  The inner plug 5 of the present embodiment can be obtained by molding a synthetic resin such as polypropylene (PP) in a mold. However, when the elastic piece 5h is provided above the air communication port 5g. The lower surface of the elastic piece 5h that is undercut by the partition wall 5a can be formed by the lower mold using the air communication port 5g. That is, when the elastic piece 5h is molded, it is not necessary to provide a slide or the like on the mold, and the mold can be formed by a mold that moves in the vertical direction. Variations in this can also be suppressed.

  The check valve 6 has an air valve 6a for restricting the flow of air and an extraction valve 6b for restricting the flow of contents. The check valve 6 of the present embodiment is formed 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 cylindrical shape centering on the central axis O, and includes a base portion 6c whose lower end is supported by the recess 5e. Further, on the radially outer side of the base portion 6c, there is provided a thin portion 6d having a donut plate shape centered on the central axis O and capable of elastic deformation, and the inner edge portion of the thin portion 6d is integrally connected to the base portion 6c. ing. Note that the air valve 6a is not limited to one in which the base 6c and the thin portion 6d are integrally connected as in the present embodiment. For example, the base and the thin portion are formed differently, and the inner edge of the thin portion is the base. It may be fitted. Further, the outer edge portion 6e of the thin portion 6d is thicker than the inner edge portion of the thin portion 6d.

  The dispensing 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 a part of the cylindrical wall 5c is released. A plate-like pouring valve main body 6f that is left as it is, and a connecting piece 6g that elastically connects the pouring valve main body 6f and the base portion 6c are provided.

  The movement valve 7 is disposed in the cylindrical wall 5c and is provided so as to move along the inner peripheral surface of the cylindrical wall 5c in accordance with a change in the attitude of the container body 1. In the state where the container main body 1 is in the upright posture as shown in FIG. 1, the moving valve 7 is seated on the reduced diameter lower portion of the cylindrical wall 5 c so that the cylindrical wall 5 c and the filling space S are not communicated with each other. It is in a state.

  The cap body 8 includes a top wall 8a positioned 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. An outer edge wall 5f of the inner plug 5 is fitted and held on the inner surface of the outer peripheral wall 8b. Further, the cap body 8 of the present embodiment is made of synthetic resin.

  At the center of the top wall 8a, there is provided a pouring cylinder 8d extending upward from the edge of the hole penetrating the top wall 8a and having its upper opening as a spout 8c for contents. In addition, a recess 8e that opens downward is provided on the lower surface of the top wall 8a. As shown in FIG. 1, the concave portion 8 e supports the upper end portion of the base portion 6 c whose lower end portion is supported by the concave portion 5 e of the inner plug 5. Since the outer edge wall 5f of the inner plug 5 is fitted and held on the inner surface of the cap body 8 as described above, 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, a step portion 8f with which the outer edge portion 6e of the air valve 6a abuts is provided immediately above the elastic piece 5h as shown in the partial enlarged view of FIG. 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 on the upper surface of the other end portion 5k (see FIG. 2B) of the elastic piece 5h. It is in contact. By the way, in embodiment shown in FIG.2 (b) and FIG. 5, although the upper surface of the other end part 5k is in surface contact with the lower surface of the outer edge part 6e, when a contact area is too large, it is from the outer edge part 6e. As the resistance increases, the elastic pieces 5h and 5h ′ are difficult to move, and the air valve 6a is subjected to an excessive resistance, which may affect the function of the air valve 6a. In such a case, as shown in the embodiment shown in FIG. 6, a convex portion 5m is provided so that the upper surface of the convex portion 5m is in line contact with the lower surface of the outer edge portion 6e. You may employ | adopt the structure which curves the upper surface of the part 5m in the width direction, and makes point contact with the lower surface of the outer edge part 6e. In the case where such a convex portion 5m is provided, the contact area with the outer edge portion 6e is reduced and the elastic piece 5h ″ can move easily, so that the resistance applied to the air valve 6a can be optimized.

  The top wall 8a is provided with an outside air inlet 8g penetrating the front and back. Here, between the outside air introduction port 8g and the ventilation port 3e, the air communication port 5g is routed through the notch 3f or formed between the air communication port 5g and the male screw portion 3d and the female screw portion 8j. A communication path T is provided through a spiral gap. In addition, although the air which passes along the communicating path T becomes easy to flow by providing the notch 3f, you may abbreviate | omit this. Further, a claw portion 8h for holding the lid body 9 is provided on the outer edge portion of the top wall 8a.

  The outer peripheral wall 8b is provided with a female screw portion 8j that fits the male screw portion 3d on the inner peripheral surface thereof. 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 mounted on the mouth portion 3a.

  The lid body 9 includes a top wall 9a positioned above the top wall 8a and a lid outer peripheral wall 9b that is integrally connected to the top wall 9a.

  A seal cylinder 9c is provided on the lower surface of the top wall 9a so as to be inserted inside the extraction cylinder 8d and to come into airtight contact with the inner surface of the extraction cylinder 8d.

  An engagement recess 9d that engages with the claw portion 8h is provided on the inner peripheral surface of the lid outer peripheral wall 9b. A hinge portion 9e that is integrally connected to the outer peripheral wall 8b of the cap body 8 is provided on the outer peripheral surface of the lid outer peripheral wall 9b on the radially outer side of the outside air inlet 8g. The lid body 9 of the present embodiment is integrally connected to the cap body 8. However, the lid body 9 is provided separately from the cap body 8 and may be detachably attached to the cap body 8 by screws or undercuts. Good.

  In the double container having such a configuration, the inner space N is pressurized by pressing the body portion of the outer layer body 3, thereby increasing the pressure of the filling space S. While raising the pouring valve body 6f, it flows into the inside of the base 6c through the gap around the connecting piece 6g from the content communication port 5b, and is poured out from the pouring outlet 8c through the inside of the pouring cylinder 8d. It is. Here, the communication passage T connecting the vent 3e and the outside air introduction port 8g is closed with the outer edge portion 6e of the air valve 6a being in contact with the step portion 8f, so that the air in the inner space N leaks to the outside. There is nothing. The movement valve 7 in the cylindrical wall 5c is caused by its own weight or contents flowing in from the opening on the lower side of the cylindrical wall 5c in a state where the container body 1 is displaced in a tilted posture so as to dispense the contents. , Has moved to the side of the dispensing valve main body 6f (position indicated by a broken line in FIG. 1).

  Thereafter, by returning the container main body 1 to the upright posture while releasing the pressure on the outer layer body 3, the pressure in the filling space S returns to the original state and the dispensing valve main body 6f is seated on the upper surface of the partition wall 5a. Further, it is possible to prevent the outside air from flowing into the filling space S from the communication port 5b for contents. Further, the moving 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 moving valve 7 is formed inside the cylindrical wall 5c. Therefore, the content liquid corresponding to this space can be pulled back from the dispensing cylinder 8d into the cylindrical wall 5c (suck back function), and dripping can be effectively prevented. In addition, since the moving valve 7 moved downward is seated on the reduced diameter lower portion of the cylindrical wall 5c, it is possible to prevent the outside air from flowing into the filling space S from the cylindrical wall 5c. Here, in the air valve 6a, the portion of the outer edge portion 6e where the elastic piece 5h is not in contact can be separated from the step portion 8f, and the portion where the elastic piece 5h is in contact also bends the elastic piece 5h. However, it can be separated from the step portion 8f. For this reason, when the internal space N is depressurized as the outer layer body 3 is restored, the air entering from the outside air introduction port 8g passes through the gap between the outer edge portion 6e and the step portion 8f separated from the step portion 8f. It is introduced into the internal space N through the communication port 5g and the vent 3e. Thereby, the outer layer body 3 can be restored while the inner layer body 2 is deformed 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 it is possible to effectively suppress the noise.

  Incidentally, in the embodiment shown in FIGS. 1 and 2, six elastic pieces 5h are provided at an equal angle with the central axis O as the center. However, as shown in FIG. Even in the case of individual pieces, sound generation can be suppressed. The elastic piece 5h in FIG. 3 (a) is located in the 180 ° direction when the direction in which the outside air introduction port 8g is located from the central axis O is the 0 ° direction, but the outside air introduction port 8g. On the other hand, when the elastic piece 5h was relatively rotated around the central axis O and confirmed, it was possible to suppress noise generation in any direction. Further, the outer layer body 3 was restored without any problem in any direction. Here, the fact that the elastic piece 5h is positioned in the 180 ° direction means the position of the portion (the other end portion 5k shown in FIG. 2B in this embodiment) where the elastic piece 5h contacts the thin portion 6d. Also, the position of the other end 5k is used as a reference.

  As a result of further investigation, as shown in FIG. 3 (b), the sound produced when two elastic pieces 5h are provided in the 0 ° direction and the 180 ° direction can be suppressed more than in the case of FIG. 3 (a). However, as shown in FIG. 3C, when four pieces are provided in the 45 ° direction, 135 ° direction, 225 ° direction, and 315 ° direction, and as shown in FIG. 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 piece 5h shown in FIGS. 3 (b) to 3 (d) was also confirmed by rotating it with respect to the outside air introduction port 8g as a whole, but almost no change was found in the result of the sound. In addition, no effect was observed in the restoration of the outer layer body 3.

  By the way, as shown in FIG. 4A, about the case where 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 sound generation was confirmed, a change was recognized depending on the position relative to the outside air inlet 8g. This point will be described with reference to FIGS. 4A to 4F. A range from 90 ° to 270 ° (including 90 ° and 270 °) around the central axis O is defined as a front region F, and the remaining portion (0 ° When the rear region R is set to ~ 90 °, 270 ° to 360 °), at the positions shown in FIGS. 4D to 4F, the sound is suppressed substantially equivalent to FIGS. 3C to 3D. Although it was possible, at the positions shown in FIGS. 4A to 4C, it was possible to further suppress the sound. In other words, it can be said that in order to suppress the noise, it is more effective to suppress the elastic piece 5h in the front region F than in the rear region R. In addition, also in the case of FIG. 4 (a)-(f), the reconstruction of the outer layer body 3 was favorable.

  As described above, it is possible to suppress the sound of the air valve 6a by providing at least one elastic piece 5h. However, when a plurality of elastic pieces 5h are provided in the front region F as shown in FIG. Can further suppress noise.

  Then, as shown in FIG. 3E, when eight elastic pieces 5h are provided at an equal angle around the central axis O, 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, the occurrence of sound was not recognized. Further, as shown in FIG. 3 (f), no noise 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 six or eight elastic pieces 5h around the central axis O at equal angles in order to suppress the noise of the air valve 6a. In the case of FIG. 3 (e) as well, the restoration of the outer layer body 3 was good, but as the number of elastic pieces 5h increased, the outer edge part 6e hardly separated from the step part 8f, and the outer layer body 3 was restored. May be affected. For this reason, it can be said that it is particularly preferable to provide six elastic pieces 5h at an equal angle around the central axis O in consideration of the suppression of the sound of the air valve 6a and the restoring property of the outer layer body 3.

  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 be added with other configurations. Good. For example, the thin-walled portion 6d of the air valve 6a in this 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 with respect to the cap body 8. However, the cap body 8 may be directly supported by the cap body 8 by providing a portion corresponding to the base portion 6c. Further, in this embodiment, the portion where the elastic piece 5h abuts on the thin portion 6d is the other end portion 5k, but the intermediate portion of the elastic piece 5h is positioned above the other end portion 5k. May contact the thin portion 6d. Further, the outer edge portion 6e of the air valve 6a is in contact with the step portion 8f of the cap body 8. However, the outer edge portion 6e may be in contact with the lower surface of the top wall 8a without providing the step portion 8f.

1: Container body 2: Inner layer body 3: Outer layer body 3a: Mouth part 3b: Upper part 3c: Lower part 3d: Male thread part 3e: Vent 3f: Notch 4: Dispensing cap 5: Inner plug 5a: Septum 5b: Content communication port 5c: cylindrical wall 5d: seal wall 5e: recess 5f: outer edge wall 5g: air communication port 5h, 5h ', 5h ": elastic piece 5j: one end 5k: the other end 5m: convex 6: Check valve 6a: Air valve 6b: Pour valve 6c: Base portion 6d: Thin portion 6e: Outer edge portion 6f: Pour valve body 6g: Connecting piece 7: Moving valve 8: Cap body 8a: Top wall 8b: Outer circumference Wall 8c: Outlet 8d: Outlet tube 8e: Recessed portion 8f: Step portion 8g: Outside air inlet 8h: Claw portion 8j: Female screw portion 9: Lid 9a: Top wall 9b: Lid outer wall 9c: Seal tube 9d: Engagement Joint recess 9e: Hinge part F: Front area N: Internal space O: Center axis R: Rear area S: Filling space T: Communication path

Claims (6)

An inner layer body having a filling space capable of containing the contents, an outer layer body having an air passage penetrating the mouth portion and having an internal space leading to the air hole between the inner layer body, and the filling space A double container having a spout and having a spout cap that surrounds the vent and is attached to the mouth,
The dispensing cap is
A cap body having an outside air introduction port leading to the ventilation port and a communication path through which air passes between the ventilation port and the outside air introduction port;
While extending radially inward from the inside, the inner edge is directly or indirectly supported by the cap body, and the outer edge normally abuts the back surface of the cap body to close the communication path. An air valve having a thin portion that releases the communication passage away from the back surface of the cap body when the internal space is under reduced pressure;
While facing the back surface of the cap body across the thin-walled portion, while projecting in a direction approaching the thin-walled portion from one end supported directly or indirectly by the cap body toward the thin-walled portion A double container comprising: an elastic piece extending in a circumferential direction of the thin wall portion and contacting a part of the thin wall portion to limit separation of the outer edge portion from the back surface of the cap body. The pouring cap includes a partition wall that covers the mouth portion, a communication port for contents that penetrates the partition wall to communicate the filling space and the spout port, and the ventilation port and the outside air introduction port that penetrate the partition wall. And an air plug that communicates with the air communication port.
2. The double container according to claim 1, wherein the elastic piece has the one end connected to the partition wall and is provided immediately above the air communication port. The thin portion 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 starting from the central axis of the thin-walled portion is the 0 ° direction, and the range of 90 ° to 270 ° around the central axis is the front The double container according to claim 1 or 2, wherein a plurality of areas are provided in at least the front area when the area and the remainder are the rear area.   The double container according to claim 3, wherein six or eight elastic pieces are equiangularly arranged 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 inner edge portion.   The said elastic piece is a double container as described in any one of Claims 1-5 which has a convex part in the site | part contact | abutted to a part of said thin part.

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