JP2018034897A - Double container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double container capable of effectively suppressing sounding caused by an air valve.SOLUTION: A double container includes: an inner layer body 2 having a filling space S; an outer layer body 3 having a vent hole 3e penetrating into a mouth 3a, and forming an interior space N communicated with the vent hole 3e in an interval with the inner layer body 2; and an extraction cap 4 having an extraction port 8c communicated with the filling space S and mounted on the mouth 3a, surrounding the vent hole 3e. The extraction cap 4 has: a cap body 8 having an outside air introduction port 8g communicated with the vent hole 3e; an air valve 6a abutted on the rear face of the cap body 8 at normal time, and closing a communication passage T connecting the vent hole 3e and the outside air introduction port 8g, and on the other hand, releasing the communication passage T by being separated from the rear face of the cap body 8 when the interior space N is under a reduced pressure; and a regulation part 5f provided oppositely to the rear face of the cap body 8 with the air valve 6a therebetween, abutted on part of the air valve 6a, and regulating separation of the air valve 6a from the rear face of the cap body 8.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, and an outer layer body having a vent hole penetrating the mouth portion and forming an inner space between the inner layer body and the inner layer body. A double container having a spout opening that leads to the filling space and a spout cap that surrounds the vent and is attached to the spout;
The dispensing cap has a cap body having an outside air introduction port that communicates with the ventilation port, and normally closes a communication path that contacts the back surface of the cap body and connects the ventilation port and the outside air introduction port. An air valve that separates from the back surface of the cap body to release the communication passage when the internal space is under reduced pressure, and is provided to face the back surface of the cap body across the air valve. And a restricting portion that restricts separation of the air valve from the back surface of the cap body.

The air valve has a cylindrical base, a donut plate shape, and is elastically deformable. The inner edge is fixedly supported by the base, and the outer edge is in contact with the back surface of the cap body so as to be separated. And
The restricting portion is in contact with the outer edge portion, and a direction in which the outside air introduction port is located starting from the central axis of the thin portion is defined as a 0 ° direction, and 90 ° to 270 ° around the central axis. When the range is the front region and the remaining portion is the rear region, it is preferable that a plurality of at least the front region is provided.

  In the front region, it is preferable that all the central angles of the outer edge portions not supported by the restricting portion are 45 ° or less.

  It is preferable that six to eight restricting portions are provided 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 restricting portion is a protrusion extending outward in the radial direction while being curved in a direction approaching the air valve.

  The pouring cap of the present invention is provided to face the back surface of the cap body with the air valve interposed therebetween, and includes a regulating portion that abuts against a part of the air valve and restricts separation of the air valve from the back surface of the cap body. ing. In other words, since the vibration of the air valve is suppressed by the restricting portion, the noise can be effectively suppressed. Since the air valve can be separated from the back surface of the cap body at the portion where the restricting portion is not in contact, introduction of air into the internal space is ensured. In this specification and the like, the contact includes not only a state where two members are in contact but also a state where they are slightly separated.

It is the figure which showed the periphery of the extraction | pouring cap about 1st embodiment of the double container according to this invention, Comprising: It is sectional drawing in alignment with AA of FIG. It is a top view of the inner stopper shown in FIG. It is the top view which showed typically the positional relationship of an external air inlet and protrusion (regulation part), Comprising: (a)-(f) is one protrusion, two pieces, four pieces, six pieces, and seven, respectively. The case of 8 pieces is shown. It is a figure explaining the position rotated relatively with respect to the external air introduction port, maintaining the whole arrangement | positioning about the processus | protrusion shown in FIG.3 (e). It is the figure which showed the periphery of the extraction | pouring cap about 2nd embodiment of the double container according to this invention, Comprising: It is sectional drawing which follows BB of FIG. It is a top view of the inner stopper shown in FIG. It is the figure which showed the periphery of the pouring cap about 3rd embodiment of the double container according to this invention, Comprising: It is sectional drawing which follows CC of FIG. It is a top view of the inner stopper shown in FIG.

  Hereinafter, with reference to FIG. 1, 1st embodiment of the double container according to this invention is described. 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, a projection (regulating portion) 5f protruding upward is provided on the radially outer side of the recess 5e on the upper surface of the partition wall 5a. The protrusion 5f of the present embodiment has a form extending outward in the radial direction while being curved in a direction protruding upward. Further, as shown in FIG. 2, eight protrusions 5f are provided at equal angles around the central axis O.

  Further, an outer edge wall 5h extending upward from the outer edge of the partition wall 5a is provided on the radially outer side of the protrusion 5f on the upper surface of the partition wall 5a. Further, a connecting portion between the partition wall 5a and the outer edge wall 5h is provided with an air communication port 5j penetrating therethrough. Note that the inner plug 5 of the present embodiment is formed of a synthetic resin such as polypropylene (PP), for example.

  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 this embodiment is formed of a soft material such as rubber, elastomer, or soft polyethylene (low density polyethylene).

  The air valve 6a has a cylindrical shape centered 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. And fixedly supported. It should be noted that the inner edge portion is fixedly supported by the base portion is not limited to the case where both are integrally connected as in the present embodiment, for example, the base portion and the thin portion are formed separately, and the inner edge portion of the thin portion is the base portion. It may be adapted to be fitted on. 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. 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. A recess 8e that opens downward and supports the upper end of the base portion 6c is provided on the lower surface of the top wall 8a, and a step portion with which the outer edge portion 6e of the air valve 6a abuts just above the protrusion 5f. 8f is provided. In the present embodiment, as shown in the partially enlarged view of FIG. 1, when 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 the upper surface of the tip portion 5g of the protrusion 5f. Abut. In the projection 5f in this embodiment, the tip 5g is in contact with the lower surface of the outer edge 6e, but a slight gap (for example, 0.05 mm) may be provided.

  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 vent port 3e, the air communication port 5j is routed through the notch 3f, or is formed between the air communication port 5j 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 of the first embodiment described above, eight protrusions 5f are provided, but six may be provided as in the second embodiment shown in FIGS. Six protrusions 5f of the present embodiment are provided around the central axis O at an equal angle. The double container of the second embodiment is basically the same as the first embodiment except for the protrusions 5f, and therefore the same reference numerals as those used in the first embodiment described above are attached to the drawings. The description is omitted.

  In such a double container of the first embodiment and the second embodiment, the internal space N is pressurized by pressing the body portion of the outer layer body 3, and thereby the pressure of the filling space S increases, The contents of the filling space S flow into the inside of the base portion 6c from the contents communication port 5b through the gap around the connecting piece 6g while raising the pouring valve body 6f, and pass through the inside of the pouring cylinder 8d. Then, it is poured out from the outlet 8c. 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, if the pressure on the outer layer body 3 is released, the pressure in the filling space S returns to the original state and the discharge valve main body 6f is seated on the upper surface of the partition wall 5a. The flow of outside air into the can be prevented. Further, by moving the container body 1 to the original upright posture, the moving valve 7 moves downward due to its own weight or a pressure drop in the filling space S. As a result, a space corresponding to the movement of the moving valve 7 is formed on the upper inner side of the cylindrical wall 5c. Therefore, the content liquid corresponding to the space is discharged from the dispensing cylinder 8d to the cylindrical wall 5c. It can be pulled back in (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 protrusion 5f is not in contact 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, air is introduced into the internal space N from the external air introduction port 8g through the separated part of the air valve 6a. Thereby, the outer layer body 3 can be restored while the inner layer body 2 is deformed and deformed. Moreover, since the vibration of the air valve 6a is suppressed by the protrusion 5f coming into contact with the outer edge portion 6e, it is possible to effectively suppress the noise. Note that the protrusion 5f is in contact with the outer edge portion 6e includes not only a state where the protrusion 5f is in contact with the outer edge portion 6e in a normal state but also a state where there is a slight gap. Even when there is a gap, the protrusion 5f comes into contact with the outer edge portion 6e when the air valve 6a is opened, so that vibration of the air valve 6a can be suppressed.

  The double container of the present invention can also be realized in the third embodiment shown in FIGS. In the present embodiment, instead of the above-described pouring cap 4 and lid body 9, a pouring cap 14 (comprising an inner plug 15, a check valve 16, and a cap body 18) and a lid body 19 are provided.

  The inner plug 15 includes an inner plug body 15a having a substantially bottomed cylindrical shape, a flange wall 15b extending radially outward from the outer edge of the inner plug body 15a, and extending upward from the outer edge of the flange wall 15b. And an outer edge wall 15c.

  The inner plug body 15a includes a communication port 15d for contents that penetrates the inner plug body 15a in the vertical direction. An annular wall 15e extending upward from the inner plug main body 15a is provided on the radially outer side of the content communication port 15d. Further, a concave portion 15f having an upper opening is provided on the radially outer side of the annular wall 15e.

  The flange wall 15b includes an annular seal wall 15g that extends downward and comes into liquid-tight contact with the inner layer body 2. Further, a projection (regulating portion) 15h protruding upward is provided on the upper surface of the flange wall 15b. Similarly to the above-described protrusion 5f, the protrusion 15h of the present embodiment also has a form extending outward in the radial direction while being curved in a direction protruding toward the protrusion. Further, as shown in FIG. 8, six protrusions 15h are provided at equal angles with the central axis O as the center.

  In addition, an air communication port 15k penetrating through the connecting portion between the flange wall 15b and the outer edge wall 15c is provided.

  The check valve 16 has an air valve 16a for restricting the flow of air and an extraction valve 16b for restricting the flow of contents. The air valve 16a has a cylindrical shape centered on the central axis O, and includes a base portion 16c whose lower end is supported by the recess 15f. Further, on the radially outer side of the base portion 16c, a thin portion 16d having the same configuration as the above-described thin portion 6d is provided, and the inner edge portion of the thin portion 16d is integrally connected to the base portion 16c and fixedly supported. . Further, the outer edge portion 16e of the thin portion 16d is also thicker than the inner edge portion of the thin portion 16d, similarly to the outer edge portion 6e described above.

  The pouring valve 16b includes a bottomed cylindrical pouring valve body 16f located inside the annular wall 15e. The dispensing valve main body 16f in the present embodiment includes a bottom portion that is inclined downward toward the outside in the radial direction, a rod-like portion that rises upward from the center of the bottom portion, and an annular wall 15e from the outer edge of the bottom portion. And a peripheral wall portion that is slidable with respect to the annular wall 15e. A flange portion 16g extending radially outward and seated on the upper surface of the annular wall 15e is provided on the outer edge of the dispensing valve main body 16f, and further between the flange portion 16g and the base portion 16c. A connecting piece 16h that connects these components integrally and elastically holds the dispensing valve main body 16f is provided.

  The cap body 18 includes a top wall 18a positioned above the check valve 16, and an outer peripheral wall 18b that is integrally connected to the outer edge of the top wall 18a and surrounds the mouth 3a. On the top surface of the ceiling wall 18a, there is provided a dispensing cylinder 18d that extends upward from the edge of the hole that penetrates the ceiling wall 18a and has the upper opening as a spout 18c for contents. A recess 18e that opens downward and supports the upper end of the base portion 16c is provided on the lower surface of the top wall 18a, and a step portion with which the outer edge portion 16e of the air valve 16a abuts just above the protrusion 15h. 18f is provided. In the present embodiment, as shown in the partially enlarged view of FIG. 7, when the upper surface of the outer edge portion 16e is in contact with the lower surface of the step portion 18f, the lower surface of the outer edge portion 16e is the upper surface of the tip portion 15j of the protrusion 15h. Abut. In the present embodiment, the protrusion 15h has the tip portion 15j in contact with the lower surface of the outer edge portion 16e as in the above-described embodiment, but may have a slight gap (for example, 0.05 mm).

  Further, on the upper surface of the top wall 18a, a radially outer side of the pouring cylinder 18d is provided with a covered cylindrical convex wall 18g protruding upward. The upper wall of the convex wall 18g is provided with an outside air inlet 18h penetrating therethrough, and the air passage 15k and the cutout 3f are connected between the vent 3e and the outside air inlet 18h. A passage T is formed. A claw portion 18j that holds the lid 19 is also provided on the top surface of the top wall 18a.

  The outer peripheral wall 18b includes a female screw portion 18k that fits the male screw portion 3d on the inner peripheral surface thereof. Further, the lower end portion of the outer peripheral wall 18b is in airtight contact with the lower portion 3c in a state where the cap main body 18 is mounted on the mouth portion 3a.

  The lid body 19 includes a top wall 19a located above the top wall 18a, and a lid outer peripheral wall 19b that is integrally connected to the top wall 19a. On the lower surface of the top wall 19a, there is provided a seal cylinder 19c that is inserted inside the extraction cylinder 18d and hermetically contacts the inner surface of the extraction cylinder 18d. The seal cylinder 19c is positioned immediately above the rod-shaped portion of the dispensing valve main body 16f when the lid 19 is closed. Thereby, even if the dispensing valve main body 16f may rise unintentionally, excessive movement can be prevented by the seal cylinder 19c, so that, for example, the dispensing valve main body 16f remains raised and connected. It is possible to prevent problems such as deformation of the piece 16h. A cylindrical engagement wall 19d that engages with the claw portion 18j is provided on the radially outer side of the seal cylinder 19c. The lid outer peripheral wall 19b is provided with a hinge portion 19e that is integrally connected to the outer peripheral wall 18b of the cap body 18.

  Also in the double container of the present embodiment, 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, so the contents of the filling space S are the contents The flange 16g is separated from the upper surface of the annular wall 15e while flowing into the annular wall 15e from the communication port 15d and raising the extraction valve main body 16f. Further, the content flows into the pouring cylinder 18d through the gap between the annular wall 15e and the flange portion 16g, and is poured out from the pouring outlet 18c. Note that the communication path T connecting the vent 3e and the outside air introduction port 18h is closed with the outer edge portion 16e coming into contact with the step portion 18f, so that the air in the inner space N does not leak to the outside.

  On the other hand, if the pressure on the outer layer body 3 is released, the pressure in the filling space S returns to the original state, and therefore the pour-out valve body 16f that has risen is moved along the annular wall 15e with the restoring force of the connecting piece 16h. Start to descend. The peripheral wall portion of the dispensing valve main body 16f is slidable with the annular wall 15e, and the content hardly flows between them. That is, the space surrounded by the top wall 18a, the pouring valve body 16f, and the base portion 16c (referred to as a storage space K) communicates with the pouring port 18c through the pouring cylinder 18d, but the communication port 15d for contents. And will be out of communication. Then, as the lowering of the dispensing valve main body 16f proceeds, the internal volume of the storage space K increases, so that the content is drawn back from the dispensing cylinder 18d to the storage space K. That is, similarly to the first embodiment and the second embodiment, the suck back function is exhibited also in the present embodiment, and dripping can be effectively prevented.

  In the air valve 16a, the portion of the outer edge portion 16e where the projection 15h is not in contact can be separated from the step portion 18f, so that when the inner space N is decompressed as the outer layer body 3 is restored. The air is introduced into the internal space N from the outside air inlet 18h through the separated part of the air valve 16a. Thereby, like the embodiment described above, the outer layer body 3 can be restored while the inner layer body 2 is deformed and reduced. Further, since the vibration of the air valve 16a is suppressed by the protrusion 15h coming into contact with the outer edge portion 16e, it is possible to effectively suppress the noise. Note that the protrusion 15h is in contact with the outer edge portion 16e includes not only a state in which the protrusion 15h is in contact with the outer edge portion 16e in a normal state but also a state in which there is a slight gap. Similarly, vibration of the air valve 16a can be suppressed even when such a slight gap is left.

  In the embodiment shown in FIGS. 1 and 2, eight protrusions 5f are provided at an equal angle with the central axis O as the center. However, as shown in FIG. Even in this case, the sound can be suppressed. The protrusion 5f in FIG. 3A 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. On the other hand, when the protrusion 5f was relatively rotated around the central axis O and confirmed, it was possible to suppress the sounding of sound in any direction. Further, the outer layer body 3 was restored without any problem in any direction. Here, the protrusion 5f being positioned in the 180 ° direction means the position at the center of the circumferential width of the protrusion 5f, and in the following description, the position at the center of the circumferential width of the protrusion 5f is used as a reference. To do.

  As a result of further investigation, as shown in FIG. 3B, the noise produced when two protrusions 5f are provided in the 0 ° direction and the 180 ° direction can be suppressed more than in the case of FIG. 3A. However, when four pieces are provided in the 45 ° direction, the 135 ° direction, the 225 ° direction, and the 315 ° direction as shown in FIG. 3C, and the 45 ° direction and 90 ° as shown in FIG. In the case of providing six in the direction, 135 ° direction, 225 ° direction, 270 ° direction, and 315 ° direction, it was possible to further suppress noise. Note that the protrusion 5f shown in FIGS. 3 (c) and 3 (d) was also confirmed by rotating it entirely with respect to the outside air inlet 8g, but there was almost no change in the sounding result. It was.

  By the way, as shown in FIG. 3 (e), when the seven protrusions 5f are provided in the 45 ° direction, 90 ° direction, 135 ° direction, 180 ° direction, 225 ° direction, 270 ° direction, and 315 ° direction, the sound is produced. Was confirmed by rotating the protrusion 5f as a whole, and a change was observed depending on the position relative to the outside air inlet 8g. When this point is described with reference to FIG. 4, a range of 90 ° to 270 ° (including 90 ° and 270 °) around the central axis O is defined as a front region F, and the remainder (0 ° to 90 °, 270 ° to 360 °) in the rear region R, at the positions shown in FIGS. 4 (e4) to (e6), it was possible to suppress the sounding substantially the same as in FIGS. 3 (c) to (d). At the positions shown in FIGS. 4 (e1) to (e3), it was possible to further suppress the sound. This point will be described in more detail with reference to FIGS. 4 (e1) and 4 (e4). As shown in FIG. 4 (e1), the central angle of the outer edge portion 6e not supported by the protrusion 5f in the front region F is shown. When all of θ1 to θ2 are 45 ° or less, when any central angle in the forward region F exceeds 45 ° as in the central angle φ1 shown in FIG. A tendency for loud noises was observed.

  As described above, it is possible to suppress the noise of the air valve 6a by providing at least one projection 5f, but when providing a plurality of projections 5f in the front region F as shown in FIG. Furthermore, sound generation can be suppressed. Then, as shown in FIGS. 4 (e1) to (e3), when the protrusions 5f are provided so that all the central angles of the outer edge portions 6e not supported by the protrusions 5f in the front region F are 45 ° or less. Sound can be suppressed. Although the illustrated protrusions 5f all have the same width, the present invention is not limited to this, and may be different from each other. In order to make the central angle of the outer edge portion 6e not supported by the projection 5f in the front region F 45 ° or less, the projection 5f is made to have three or more projections 5f as shown in FIGS. 4 (e1) to (e3). For example, two protrusions 5f having an increased width in the circumferential direction may be arranged in the front region F.

  Then, as shown in FIG. 3 (f), when eight projections 5f are provided at an equal angle around the central axis O (first embodiment), the projections 5f are entirely rotated with respect to the outside air inlet 8g. No sound was observed at any position. Also, as shown in FIGS. 6 and 8, when the six projections 5f and 15h are provided at an equal angle with the central axis O as the center (second embodiment, third embodiment), the sound of the air valves 6a and 16a is also generated. The occurrence of was not observed. From this, it can be said that it is particularly preferable to provide eight or six protrusions 5f and 15h at an equal angle around the central axis O in order to suppress the noise of the air valves 6a and 16a. In the case of the first embodiment, the restoration of the outer layer body 3 was good, but as the number of the protrusions 5f and 15h increased, the outer edge portions 6e and 16e of the air valves 6a and 16a moved away from the step portions 8f and 18f. It may become difficult to affect the restoration of the outer layer body 3. For this reason, in consideration of the suppression of the sound of the air valves 6a and 16a and the restoration of the outer layer body 3, the protrusions 5f and 15h are arranged around the central axis O as in the second embodiment and the third embodiment. The case where six are provided at an angle is particularly preferable.

  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 protrusions (regulators) of the above-described embodiment hardly bend when a downward force is applied to the tip part. However, a soft material (for example, rubber or For example, when the outer edge portion is separated from the stepped portion, the outer edge portion may be bent while being in contact with the outer edge portion. Moreover, although the outer edge part of the air valve is in contact with the step part of the cap body, it may be in contact with the lower surface of the top wall without providing the step part.

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: protrusion (regulator)
5g: tip 5h: outer edge wall 5j: air communication port 6: check valve 6a: air valve 6b: pouring valve 6c: base 6d: thin wall 6e: outer edge 6f: pouring valve body 6g: connecting piece 7 : Movement valve 8: Cap body 8a: Top wall 8b: Outer wall 8c: Outlet 8d: Outlet tube 8e: Recess 8f: Step 8g: Outside air inlet 8h: Claw 8j: Female thread 9: Lid 9a: Top wall 9b: Lid outer peripheral wall 9c: Seal cylinder 9d: Engaging recess 9e: Hinge part 14: Outlet cap 15: Inner plug 15a: Inner plug body 15b: Flange wall 15c: Outer edge wall 15d: Communication port 15e for contents : Annular wall 15f: recess 15g: seal wall 15h: projection 15j: tip 15k: air communication port 16: check valve 16a: air valve 16b: discharge valve 16c: base portion 16d: thin portion 16e: outer edge portion 16f: Dispensing valve body 16g: flange portion 16h: connecting piece 18 Cap body 18a: Top wall 18b: Outer wall 18c: Outlet 18d: Outlet tube 18e: Recess 18f: Step 18g: Convex wall 18h: Outside air inlet 18j: Claw 18k: Female thread 19: Lid 19a: Top wall 19b: Lid outer peripheral wall 19c: Seal cylinder 19d: Engagement wall 19e: Hinge part F: Front area K: Storage space N: Internal space O: Central axis R: Rear area S: Filling space T: Communication path

Claims (6)

An inner layer body having a filling space capable of containing contents, an outer layer body having a vent hole penetrating through the mouth portion and forming an inner space between the inner layer body and the vent hole; and the filling space A double container having a spout opening that communicates with a spout cap that surrounds the vent and is attached to the spout;
The dispensing cap has a cap body having an outside air introduction port that communicates with the ventilation port, and normally closes a communication path that contacts the back surface of the cap body and connects the ventilation port and the outside air introduction port. An air valve that separates from the back surface of the cap body to release the communication passage when the internal space is under reduced pressure, and is provided to face the back surface of the cap body across the air valve. A double container having a restricting portion that contacts the portion and restricts separation of the air valve from the back surface of the cap body. The air valve has a cylindrical base, a donut plate shape, and is elastically deformable. The inner edge is fixedly supported by the base, and the outer edge is in contact with the back surface of the cap body so as to be separated. And
The restricting portion is in contact with the outer edge portion, and a direction in which the outside air introduction port is located starting from the central axis of the thin portion is defined as a 0 ° direction, and 90 ° to 270 ° around the central axis. 2. The double container according to claim 1, wherein when the range is a front region and the remainder is a rear region, a plurality of at least the front region is provided.   3. The double container according to claim 2, wherein in the front area, all of the central angles of the outer edge portions that are not supported by the restriction portion are 45 ° or less.   The double container according to claim 2, comprising 6 to 8 restriction parts around the central axis from the front area to the rear area.   The double container according to any one of claims 2 to 4, wherein the outer edge portion is thicker than the inner edge portion.   The double container according to any one of claims 2 to 5, wherein the restricting portion is a protrusion extending outward in a radial direction while being curved in a direction approaching the air valve.

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