JP6566772B2 - Double container - Google Patents

Description

  The present invention relates to a double container including an outer layer body that forms an outer shell of the container, an inner layer body that is housed inside the outer layer body, and an outside air introduction hole that penetrates the outer layer body. When discarded, the crushed state can be maintained.

  Conventionally, an outer layer body forming a bottle shape having a mouth portion, a body portion and a bottom portion and forming an outer shell of a container, an inner layer body housed inside the outer layer body, and an outside air introduction hole penetrating the outer layer body A double container (also referred to as a delamination container) capable of introducing outside air into the internal space formed between the outer layer body and the inner layer body from the outside air introduction hole in accordance with volume reduction deformation of the inner layer body is known (for example, Patent Document 1).

JP 2008-207860 A

  However, the double container having the structure as described above has a property that when the container is used and discarded, even after the container is crushed, outside air is gradually taken in and restored to its original shape over time. There is a problem that the volume becomes large at the time of disposal.

  The present invention has been developed to solve the above-described problems, and includes an outer layer body that forms an outer shell of a container, an inner layer body that is housed inside the outer layer body, and an outside air introduction hole that penetrates the outer layer body. When the container is crushed and discarded, the object is to hold the crushed state.

That is, the gist configuration of the present invention is as follows.
1. An outer layer body that forms a bottle shape having a mouth portion, a body portion, and a bottom portion and forms an outer shell of a container, an inner layer body that is housed inside the outer layer body, and an outside air introduction hole that penetrates the outer layer body In the double container capable of introducing the outside air into the internal space formed between the outer layer body and the inner layer body from the outside air introduction hole in accordance with the volume reduction deformation of the inner layer body,
An air valve that is inserted into the outside air introduction hole and can be fitted to a peripheral portion of the outside air introduction hole at a first-stage fitting position and a second-stage fitting position having a different insertion depth from the fitting position. Prepared,
In the first-stage fitting position, at least when releasing the squeeze of the body portion, a gap serving as a ventilation path is formed between the air valve and the peripheral portion of the outside air introduction hole,
In the second-stage fitting position, a space between the air valve and the peripheral portion of the outside air introduction hole is sealed.

2. The said double valve of said 1 provided with the cyclic | annular fitting groove fitted to the peripheral part of the said external air introduction hole in the said 1st step | paragraph fitting position.

3. The air valve includes at least one air groove that crosses the fitting groove, and the at least one air groove vents between a peripheral portion of the outside air introduction hole at the first-stage fitting position. The double container according to 2 above, wherein the gap serving as a path is formed.

4). The air valve includes a cylindrical insertion portion that is inserted into the outside air introduction hole, and a lid portion that closes one end of the insertion portion,
The outer peripheral edge portion of the lid portion protrudes in a flange shape from the insertion portion, and contacts the peripheral edge portion of the outside air introduction hole at the second-stage fitting position. container.

5. The second double container in which the gap serving as a ventilation path is formed between a peripheral edge of the outside air introduction hole and the fitting groove by rotating the air valve at the first-stage fitting position. .

6). The double container according to 5 above, wherein the outside air introduction hole and the fitting groove are both elliptical.

7). The air valve includes a cylindrical insertion portion that is inserted into the outside air introduction hole, a lid that closes one end of the insertion portion, and a knob that is erected on the lid.
5. The double container according to 5 or 6, wherein an outer peripheral edge portion of the lid portion protrudes in a flange shape from the insertion portion, and abuts on a peripheral edge portion of the outside air introduction hole at the second-stage fitting position.

  According to the present invention, by disposing the air valve at the first-stage mating position, when the body is pressed (squeezed) to discharge the contents, at least when the squeeze of the body is released, the outside air is separated from the air valve and the outside air. It can introduce | transduce into the internal space between an outer layer body and an inner layer body through the clearance gap between the peripheral parts of an introduction hole. Further, when the container is crushed and discarded, the air valve is moved to the second-stage fitting position in a state where the container is crushed, thereby sealing between the air valve and the peripheral portion of the outside air introduction hole, The crushed state can be maintained.

  Therefore, according to the present invention, in a double container comprising an outer layer body that forms an outer shell of a container, an inner layer body that is housed inside the outer layer body, and an outside air introduction hole that penetrates the outer layer body, When crushed and discarded, the crushed state can be maintained.

It is a longitudinal cross-sectional view of the double container which concerns on one Embodiment of this invention, and shows the state which has arrange | positioned the air valve in the 1st-stage fitting position. It is a longitudinal cross-sectional view of the double container of FIG. 1, and shows the state where the air valve is moved to the second-stage fitting position in a state where the container is crushed. It is the elements on larger scale of FIG. FIG. 3 is a partially enlarged view of FIG. 2. It is a figure which shows the state which has arrange | positioned the air valve in the fitting position of the 1st step | paragraph about the double container which concerns on other embodiment of this invention, and shows the longitudinal cross-sectional view of a double container with the top view and bottom view of an air valve Show. About the double container of FIG. 5, a longitudinal sectional view around the air valve, a plan view of the air valve, and a fitting of the outside air introduction hole and the air valve, showing a state where the air valve is rotated by 90 ° at the first-stage fitting position. Explanatory drawing which shows the positional relationship with a groove is shown. It is a longitudinal cross-sectional view of the double container of FIG. 5, and shows a state where the air valve is moved to the second-stage fitting position in a state where the container is crushed.

Hereinafter, with reference to FIGS. 1-4, the double container 1 which concerns on one Embodiment of this invention is illustrated and demonstrated in detail.
In this specification, the vertical direction is based on the upright state of the double container 1, and the side on which the mouth 11 of the outer layer body 10 is located is upward (for example, the upper side in FIG. 1). The side on which the bottom 13 is located is defined as the lower side (for example, the lower side in FIG. 1).

  As shown in FIG. 1, the double container 1 according to the present embodiment includes an outer layer body 10 that forms an outer shell of the container, and an inner layer body 20 that is housed inside the outer layer body 10 and is capable of volume reduction and deformation. Yes. In this embodiment, an adhesive band (not shown) is provided between the outer layer body 10 and the inner layer body 20 to partially join the outer layer body 10 and the inner layer body 20 to each other. It is also possible to adopt a configuration in which no provision is made.

  Here, the double container 1 in this embodiment includes a synthetic resin outer layer body 10, an inner layer body 20 formed of a synthetic resin having low compatibility with the outer layer body 10, and the outer layer body 10 and the inner layer body. 20. A band-shaped adhesive layer formed of a synthetic resin having adhesiveness to 20, that is, an adhesive band is laminated, and a parison formed by laminating these synthetic resins is blow molded. It was obtained by. Here, in the double container 1 of the present embodiment, the outer layer body 10 has a two-layer structure of an outer low density polyethylene (LDPE) and an inner polypropylene resin (PP), and the inner layer body 20 is made of an outer ethylene vinyl alcohol. It has a two-layer structure of a polymer resin (EVOH) and an inner modified polyolefin resin (“Admer” (registered trademark) manufactured by Mitsui Chemicals, Inc.). The adhesive band is made of a modified polyolefin resin (“Admer” (registered trademark)). In this embodiment, in order to impart squeeze properties, the outer layer of the outer layer body 10 is composed of low density polyethylene (LDPE), but polypropylene resin (PP), medium density polyethylene resin (MDPE), or High density polyethylene resin (HDPE) can also be used. Moreover, the layer of the polypropylene resin (PP) constituting the outer layer body 10 of the present embodiment is provided to improve the peelability of the inner layer body 20, and is not necessarily required. Furthermore, the above-described layer configuration is an example, and the material of the outer layer body 10, the inner layer body 20, and the adhesive band is not particularly limited as long as the inner layer body 20 can be peeled from the outer layer body 10, respectively. A single layer structure or a multilayer structure may be used. Moreover, it is not always necessary to provide an adhesive band.

  The outer layer body 10 has a bottle shape having a mouth portion 11, a body portion 12, and a bottom portion 13, and has a flexibility that can be restored. In addition, in this embodiment, the trunk | drum 12 is carrying out the cylindrical shape which a cross section is circular and an upper part reduces diameter toward the opening part 11, However, It is not limited to this, For example, a cross section is a polygon or an ellipse. It can be a shape such as a shape.

  The inner layer body 20 has a filling space M in which contents (not shown) can be filled, and can be reduced in volume by being peeled from the laminated outer layer body 10. That is, the outer layer body 10 includes an outside air introduction hole 14 penetrating the outer layer body 10, and the outer layer body 10 and the inner layer body 20 are connected to the outer layer body 10 and the inner layer body 20 from the outside air introduction hole 14 in accordance with a volume reduction deformation of the inner layer body 20 as the contents are taken out. Outside air is introduced into an internal space N formed therebetween.

  In the present embodiment, the body 12 of the outer layer body 10 includes a recess 15 that is locally recessed toward the inside, and the outside air introduction hole 14 is formed in the recess 15. An air valve 30 is inserted into the outside air introduction hole 14. As shown in FIG. 3, the air valve 30 can be fitted to the peripheral portion of the outside air introduction hole 14 at the first-stage fitting position, and as shown in FIG. 4, the first-stage fitting position is inserted. It can be fitted at the second stage fitting position with different depths. The air valve 30 can be moved to the second-stage fitting position by being pushed in from the outside at the first-stage fitting position. The air valve 30 can be made of, for example, a synthetic resin. In addition, the air valve 30 is arrange | positioned so that it may fit in the recessed part 15 in the fitting position of the 1st step | paragraph. Therefore, the air valve 30 is prevented from moving in contact with the outside during transportation on the production line.

  The air valve 30 includes a cylindrical insertion portion 31 that is inserted into the circular outside air introduction hole 14 and a disc-shaped lid portion 32 that closes one end of the insertion portion 31. An outer peripheral edge portion 32 a of the lid portion 32 protrudes from the insertion portion 31 in a flange shape. The insertion portion 31 is formed with an annular fitting groove 31a that is fitted to the peripheral portion of the outside air introduction hole 14 at the first-stage fitting position. Moreover, the four air grooves 31b which cross the fitting groove 31a are formed in the insertion part 31. As shown in FIG. The four air grooves 31b are arranged at equal intervals in the circumferential direction. In addition, the four air grooves 31b form a gap serving as a ventilation path between the outer air introduction hole 14 at the first-stage fitting position. The number of air grooves 31b is not limited to four, and may be three or less or five or more. Here, by appropriately setting the number and cross-sectional area of the air grooves 31b, when the body part 12 is squeezed, air leakage from the internal space N is suppressed and the contents can be smoothly discharged. At the time of releasing the squeeze of 12, sufficient outside air can be introduced.

  Further, as shown in FIG. 1, the double container 1 includes a pouring cap 40. The spout cap 40 includes a spout 41 that is engaged and held in the mouth portion 11, and a lid 43 that is connected to the spout 41 via a hinge 42 and opens and closes the spout 41. Yes. In addition, it is good also as a structure which forms the cover body 43 as a different body without providing the hinge 42, and engages the spout 41 with a screw engagement or an undercut engagement.

  The spout 41 is provided with a mounting cylinder 44 that undercuts engagement with the outer peripheral surface of the mouth portion 11, a partition wall 45 that covers the upper portion of the mounting cylinder 44, and an upright side from the partition wall 45. And a pouring tube 46 connected to. A cylindrical wall 47 is continuous below the dispensing tube 46, and a plurality of vertical ribs 48 provided at intervals in the circumferential direction are provided on the inner peripheral surface of the cylindrical wall 47. A spherical body 49 is disposed inside the vertical rib 48 in the radial direction, and is retained by a bulging portion provided at the upper end of the vertical rib 48. In the lower part of the cylindrical wall 47, an inclined wall 47a that is reduced in diameter downward is provided. Here, the spherical body 49 moves by its own weight along the vertical rib 48, and when the double container 1 is in the upright posture as shown in FIG. 1, it contacts the inclined wall 47a over the entire circumference. Thus, the filling space M of the inner layer body 20 is sealed.

  The lid body 43 is obtained by connecting a peripheral wall 51 to the outer edge portion of the top wall 50 covering the top of the spout 41, and the peripheral wall 51 is connected to the mounting cylinder 44 by a hinge 42. In addition, a seal cylinder 52 that is in liquid-tight contact with the dispensing cylinder 46 is provided on the lower surface of the top wall 50. In addition, a pin 53 extending downward is provided on the radially inner side of the seal cylinder 52. The pin 53 is provided so as to come into contact with the spherical body 49 before reaching the upper limit when the spherical body 49 is displaced upward. Thereby, the spherical body 49 can be reliably dropped by closing the lid body 43 after the use of the double container 1 and brought into contact with the inclined wall 47a, and the filling space M can be sealed.

  When the double container 1 is used, first, the lid body 43 is opened to place the double container 1 in a tilted or inverted posture, whereby the spherical body 49 is displaced toward the dispensing cylinder 46 side. If the outer layer body 10 is squeezed so that the body 12 is sandwiched from both sides, the air valve 30 is attached to the outside air introduction hole 14 at the first-stage fitting position, so that air leaks from the internal space N. Since it is suppressed, the contents can be discharged smoothly. Further, if the squeeze is released, the outside air is sufficiently introduced into the internal space N.

  When the double container 1 is crushed and discarded, as shown in FIGS. 2 and 4, the air valve 30 is pushed into the second position with the double container 1 being crushed and moved to the second-stage fitting position. Thus, it is possible to seal the space between the insertion portion 31 of the air valve 30 and the peripheral edge portion of the outside air introduction hole 14 and maintain the crushed state.

  As described above, the double container 1 according to the present embodiment is formed in a bottle shape having the mouth portion 11, the trunk portion 12, and the bottom portion 13 and forms the outer shell of the container, and the outer layer body 10. And an outside air introduction hole 14 penetrating the outer layer body 10, and between the outer layer body 10 and the inner layer body 20 from the outside air introduction hole 14 due to volumetric deformation of the inner layer body 20. In the double container 1 capable of introducing outside air into the formed internal space N, it is inserted into the outside air introduction hole 14, and the first-stage fitting position and the fitting position are inserted into the peripheral edge of the outside air introduction hole 14. And the air valve 30 that can be fitted at the second-stage fitting position with different heights. At the first-stage fitting position, at least when the squeezing of the body 12 is released, the air valve 30 and the peripheral portion of the outside air introduction hole 14 A gap that forms a ventilation path is formed between the Between the peripheral portion of the valve 30 and the outside air introduction hole 14 has a configuration that is sealed.

  Moreover, the double container 1 which concerns on this embodiment becomes a structure that the air valve 30 is provided with the cyclic | annular fitting groove | channel 31a fitted to the peripheral part of the external air introduction hole 14 in the 1st-stage fitting position. . Therefore, the air valve 30 can be stably held at the first-stage fitting position.

  Further, in the double container 1 according to the present embodiment, the air valve 30 includes at least one air groove 31b crossing the fitting groove 31a, and the at least one air groove 31b is a first-stage fitting. In this position, a gap that forms a ventilation path is formed between the position and the peripheral edge of the outside air introduction hole 14. Therefore, with a simple configuration, it is possible to suppress leakage of air from the internal space N during squeezing and to sufficiently introduce outside air into the internal space N when squeezing is released.

  Further, in the double container 1 according to the present embodiment, the air valve 30 includes a cylindrical insertion portion 31 that is inserted into the outside air introduction hole 14 and a lid portion 32 that closes one end of the insertion portion 31. The outer peripheral edge portion 32a of the lid portion 32 protrudes in a flange shape from the insertion portion 31, and is in contact with the peripheral edge portion of the outside air introduction hole 14 at the second-stage fitting position. Therefore, when discarding the container, the air valve 30 can be moved from the first-stage fitting position to the second-stage fitting position by a simple operation of pushing the air valve 30 all the way.

Next, with reference to FIGS. 5-7, the double container 2 which concerns on other embodiment of this invention is illustrated and demonstrated in detail.
The double container 2 which concerns on this embodiment respond | corresponds to the heat filling process of the content, and the cooling process by shower water. That is, when filling liquid foods such as soy sauce, soy sauce-containing seasonings, vinegar, cooked liquor, etc., when filling the contents into a container and making it into a product, heat filling that fills the high temperature contents There may be a process and a cooling process for cooling the container and contents using shower water after the process, but the double container 2 according to the present embodiment has the shower water as an outer layer in such a cooling process. The internal space N between the body 10 and the inner layer body 20 can be prevented from entering.

  As shown in FIG. 5, the double container 2 according to the present embodiment has a configuration of the air valve 60, the shape of the outside air introduction hole 14 ′, and the air valve 60 in the trunk portion 12, as compared with the case of the above-described embodiment. Although the mounting position of is different, other configurations are the same.

  In the present embodiment, the upper portion 12a of the body portion 12 is reduced in diameter toward the mouth portion 11 as in the case of the above-described embodiment, but the concave portion 15 ′ that is locally recessed inwardly on the upper portion 12a. It has. The outside air introduction hole 14 'is formed in the recess 15'. The outside air introduction hole 14 ′ has an elliptical shape in the present embodiment.

  The air valve 60 is erected on the lid portion 62, an insertion portion 61 having an elliptic cylinder shape inserted into the outside air introduction hole 14 ′, a disc-shaped lid portion 62 that closes one end of the insertion portion 61, and the lid portion 62. And a flat tab 63. The insertion portion 61 includes an elliptical fitting groove 61a that fits in the peripheral portion of the outside air introduction hole 14 'at the first-stage fitting position. Further, the outer peripheral edge 62 a of the lid 62 protrudes from the insertion portion 61 in a flange shape. The air valve 60 can be made of, for example, a synthetic resin.

  In the state shown in FIG. 5, the air valve 60 is in the first position at the rotational position where the major axis of the fitting groove 61a having an elliptical shape coincides with the major axis of the outside air introduction hole 14 ′ having the same elliptical shape. It is arranged at the fitting position. Therefore, in this state, the space between the peripheral edge portion of the outside air introduction hole 14 ′ and the fitting groove 61 a is sealed. Therefore, the shower water can be prevented from entering the internal space N through the cooling process in this state.

  Then, immediately after the cooling process or at the start of use of the double container 2, the knob 63 is picked from the state shown in FIG. 5, and the air valve 60 is rotated by 90 ° as shown in FIG. A gap (a portion indicated by oblique lines) serving as a ventilation path can be formed between the peripheral edge portion of 14 'and the fitting groove 61a. Accordingly, as in the case of the above-described embodiment, the contents can be smoothly discharged by squeezing the body portion 12.

  In addition, the air valve 60 is arrange | positioned so that it may not jump out radially outward from the part except the upper part 12a of the trunk | drum 12 in the 1st step | paragraph fitting position. Therefore, the air valve 60 is prevented from moving in contact with the outside during transportation on the production line.

  Further, when the double container 2 is crushed and discarded, as shown in FIG. 7, the air valve 60 is pushed into the back in a state where the double container 2 is crushed and moved to the second-stage fitting position. It is possible to seal between the insertion portion 61 of the air valve 60 and the peripheral portion of the outside air introduction hole 14 ′, and to keep the crushed state.

  As described above, the double container 2 according to the present embodiment has a bottle shape having the mouth portion 11, the trunk portion 12, and the bottom portion 13 and forms the outer shell of the container, and the outer layer body 10. The inner layer body 20 accommodated inside the outer layer body 10 and an outside air introduction hole 14 ′ penetrating the outer layer body 10, and the outer layer body 10 and the inner layer body 20 are formed from the outside air introduction hole 14 ′ along with the volume reduction deformation of the inner layer body 20. In the double container 2 capable of introducing outside air into the internal space N formed therebetween, it is inserted into the outside air introduction hole 14 ′, and the first-stage fitting position and the fitting position at the peripheral edge of the outside air introduction hole 14 ′ Is provided with an air valve 60 that can be fitted at a second-stage fitting position having a different insertion depth. At the first-stage fitting position, at least when the squeezing of the body portion 12 is released, the air valve 60 and the outside air introduction hole are provided. A gap serving as an air passage is formed between the peripheral edge of 14 'and the second-stage mating position So between the peripheral portion of the air valve 60 outside air introduction hole 14 'is in the configuration that are sealed.

  Further, the double container 2 according to the present embodiment has a configuration in which the air valve 60 includes an annular fitting groove 61a that fits to the peripheral edge portion of the outside air introduction hole 14 ′ at the first-stage fitting position. Yes.

  Further, the double container 2 according to the present embodiment forms a ventilation path between the peripheral edge of the outside air introduction hole 14 ′ and the fitting groove 61 a by rotating the air valve 60 at the first-stage fitting position. The gap is formed. Therefore, in the state until the air valve 60 is rotated at the first-stage fitting position, it is possible to prevent the shower water after the heat filling of the contents from entering the internal space N.

  Further, the double container 2 according to the present embodiment is configured such that the outside air introduction hole 14 ′ and the fitting groove 61 a are both elliptical. Therefore, the operation of rotating the air valve 60 at the first-stage fitting position can be performed smoothly.

  Further, the double container 2 according to the present embodiment includes a cylindrical insertion portion 61 into which the air valve 60 is inserted into the outside air introduction hole 14 ′, a lid portion 62 that closes one end of the insertion portion 61, and The outer peripheral edge 62a of the lid 62 protrudes in a flange shape from the insertion portion 61, and the outside air introduction hole 14 'at the second mating position. It is the structure contact | abutted to the peripheral part. Therefore, by using the knob 63, the operation of rotating the air valve 60 at the first-stage fitting position can be easily performed. When the container is discarded, the air valve 60 can be moved from the first-stage fitting position to the second-stage fitting position by a simple operation of pushing the air valve 60 all the way.

  The above description shows only one embodiment of the present invention, and various modifications can be made within the scope of the claims. For example, although the dispensing cap 40 has been described as being undercut engaged with the mouth portion 11, it may be engaged with a screw, for example. Further, the double containers 1 and 2 have been described as being so-called Delami containers in which the inner layer body 20 is detachably laminated on the inner side of the outer layer body 10, but the present invention is not limited to this. For example, the inner layer body A double container in which 20 and the outer layer body 10 are individually formed and combined after formation may be used.

DESCRIPTION OF SYMBOLS 1, 2 Double container 10 Outer layer body 11 Mouth part 12 Body part 12a Upper part of trunk part 13 Bottom part 14 Outside air introduction hole 15,15 'Recess 20 Inner layer body 30 Air valve 31 Insertion part 31a Fitting groove 31b Air groove 32 Cover part 32a Outer peripheral edge portion of lid portion 40 Pouring cap 41 Pouring plug 42 Hinge 43 Lid body 44 Mounting cylinder 45 Bulkhead 46 Pouring cylinder 47 Cylindrical wall 47a Inclined wall 48 Vertical rib 49 Spherical body 50 Top wall 51 Peripheral wall 52 Sealing cylinder 53 Pin 60 Air valve 61 Insertion part 61a Fitting groove 62 Lid part 62a Outer peripheral edge part of lid part 63 Knob part M Filling space N Internal space

Claims (7)

An outer layer body that forms a bottle shape having a mouth portion, a body portion, and a bottom portion and forms an outer shell of a container, an inner layer body that is housed inside the outer layer body, and an outside air introduction hole that penetrates the outer layer body In the double container capable of introducing the outside air into the internal space formed between the outer layer body and the inner layer body from the outside air introduction hole in accordance with the volume reduction deformation of the inner layer body,
An air valve that is inserted into the outside air introduction hole and can be fitted to a peripheral portion of the outside air introduction hole at a first-stage fitting position and a second-stage fitting position having a different insertion depth from the fitting position. Prepared,
In the first-stage fitting position, at least when releasing the squeeze of the body portion, a gap serving as a ventilation path is formed between the air valve and the peripheral portion of the outside air introduction hole,
In the second-stage fitting position, a space between the air valve and the peripheral portion of the outside air introduction hole is sealed so that the state in which the double container is crushed can be maintained. .   The said air valve is a double container of Claim 1 provided with the cyclic | annular fitting groove fitted to the peripheral part of the said external air introduction hole in the said 1st-stage fitting position.   The air valve includes at least one air groove that crosses the fitting groove, and the at least one air groove vents between a peripheral portion of the outside air introduction hole at the first-stage fitting position. The double container of Claim 2 which forms the said clearance gap used as a path | route. The air valve includes a cylindrical insertion portion that is inserted into the outside air introduction hole, and a lid portion that closes one end of the insertion portion,
The outer peripheral edge portion of the lid portion protrudes in a flange shape from the insertion portion, and abuts on the peripheral edge portion of the outside air introduction hole at the second-stage fitting position. Double container as described in.   The said clearance gap which becomes a ventilation path is formed between the peripheral part of the said external air introduction hole, and the said fitting groove by rotating the said air valve in the said 1st step fitting position. Double container.   The double container according to claim 5, wherein each of the outside air introduction hole and the fitting groove has an elliptical shape. The air valve includes a cylindrical insertion portion that is inserted into the outside air introduction hole, a lid that closes one end of the insertion portion, and a knob that is erected on the lid.
The double edge according to claim 5 or 6, wherein an outer peripheral edge portion of the lid portion protrudes in a flange shape from the insertion portion and abuts on a peripheral edge portion of the outside air introduction hole at the second-stage fitting position. container.

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