JP2018002241A - Double container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double container having a simple structure and having a function as an outside air introduction valve.SOLUTION: A double container 100 according to the present invention comprises: a cap main body 10 which has a pour-out port for pouring out contents and is fitted to a mouth part 4a; a check valve, positioned between the pour-out port and an inner layer body 3, which blocks communication of the pour-out port with the inner layer body 3 while communicates the pour-out port with the inner layer body 3 by increase in pressure in the inner layer body 3 by squeezing an outer layer body 4; and a shrink film 60 which covers the outer layer body 4 and the cap main body 10 from outside. The shrink film 60 has a region 61 where two films are overlapped, and the region 61 has an adhesion region 61 where the two films are adhered and a non-adhesion region 61a where the two films are not adhered. Outside air is introduced into a space between the outer layer body 4 and the inner layer body 3 through both of a space between the two films in the non-adhesion region 61a and an outside air introduction hole 4c provided in the outer layer body 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a double container including an inner layer body capable of volume reduction and deformation and an outer layer body in which the inner layer body is disposed.

  As a container for storing cosmetics such as skin lotion, shampoo, rinse, liquid soap, food seasoning, etc., an inner layer body that accommodates such contents and can be reduced in volume and deformed, and this inner layer body There is known a double container including an outer layer body that forms an outer shell of the container while housing the container inside. This double container includes a delamination container (lamination peeling container) formed by laminating an outer layer body and an inner layer body from the beginning, and a container of a type in which the outer layer body and the inner layer body are individually formed and assembled. The delamination container is composed of an EBM (Extrusion Blow Molding) in which a laminated parison heated and melted is sandwiched between molds and air is blown inside to form a laminated container, and an outer layer and an inner layer. There is one by biaxial stretch blow molding in which a laminated container is formed from a preform (container material) formed in a bottomed cylindrical shape. In such a double container, a cap for a double container provided with a check tube for preventing the entry of outside air into the inner layer body while being provided with a dispensing cylinder for pouring the contents at the mouth of the normal outer layer body. Is installed. Then, by pressing the outer layer body, the inner layer body is pressurized via the air between the outer layer body and the inner layer body, thereby opening the valve body of the check valve and pouring out the contents. In addition, the outer layer body is provided with a through hole that takes in outside air between the inner layer body, and when the outer layer body is restored to its original shape after pouring, the outside air is taken in from the through hole, and the inner layer body is Only the outer layer is restored while the volume is reduced.

  By the way, in the above double container, when the outside air is introduced from the outside air introduction hole provided in the cap, the outside air introduction valve having a thin annular valve body as in Patent Document 1, for example, is provided in the flow path. It is used. When the outer layer body is pressed to increase the pressure inside the inner layer body and the contents are discharged, the valve body of the outside air introduction valve abuts against the inner surface of the spout and is kept closed so that air passes through it. I can't. Further, when the outer layer body is restored to its original shape after the contents are poured out, the pressure in the space between the outer layer body and the inner layer body is reduced to a negative pressure, and the outside air introduction valve is opened. As a result, air is introduced into the space between the outer layer body and the inner layer body from the outer air introduction hole, and the outer layer body can be restored to the original shape while maintaining the volumetric deformation.

JP 2013-151316 A

  However, in the above double container, it is necessary to newly incorporate a member having the function of an outside air introduction valve into the cap or to be mounted on the container body, so that the number of parts tends to increase or the structure of the parts tends to be complicated. .

  An object of the present invention is to solve such problems, and an object of the present invention is to propose a double container having a function of an outside air introduction valve with a simple configuration.

The present invention is a double container comprising an inner layer body containing contents and a squeeze outer layer body containing the inner layer body,
A cap body having a pouring hole for pouring contents from the inner layer body, and attached to the mouth of the outer layer body;
Located between the pouring hole and the inner layer body and blocking communication between the pouring hole and the inner layer body, while the pouring hole and the inner layer body are increased by a pressure increase in the inner layer body due to squeeze of the outer layer body A check valve for communicating with the inner layer body;
A shrink film that covers at least a part of the outer layer body and the cap body from outside,
The shrink film has an overlapping area where the films are stacked, and the overlapping area can be separated from the bonding area where the stacked films are bonded to each other in the thickness direction without the stacked films being bonded. Non-adhesive area,
Outside air is introduced into the space between the outer layer body and the inner layer body through both the space between the stacked films in the non-adhesion region and the outside air introduction hole provided in the outer layer body. It is a double container characterized by.

  Further, it is preferable that the outside air introduction hole communicates with the outside only through a space between the stacked films in the non-adhesion region.

Further, at least a part of the outer layer body and the cap body is overlapped and covered in the circumferential direction by the shrink film, so that the overlapping region extending in the vertical direction is formed,
The outside air introduction hole is disposed at the mouth of the outer layer body, and the shrink film covers from the outside so as to bridge the gap between the lower end of the cap body and the outer layer body, and at least a part of the non-adhesion region is It is preferable to be provided in a region where the gap is bridged.

Further, at least a part of the outer layer body and the cap body is overlapped and covered in the circumferential direction by the shrink film, so that the overlapping region extending in the vertical direction is formed,
The outside air introduction hole is disposed in a diameter-enlarged portion or a body portion of the outer layer body, a recess is provided around the outside air introduction hole on the outer peripheral surface of the outer layer body, and at least a part of the non-adhesion region is the outside air region. It is preferable to be provided in a region overlapping the introduction hole or the recess.

Further, the outside air introduction hole is disposed in a diameter-enlarged portion or a body portion of the outer layer body, and a recess is provided around the outside air introduction hole in the outer peripheral surface of the outer layer body,
A valve body film is disposed between the shrink film and the outer layer body, and an overlapping portion of the shrink film and the valve body film forms the overlapping region,
At least a part of the non-adhesion region is provided in a region overlapping the outside air introduction hole or the recess,
It is preferable that a slit is provided in the shrink film in the non-bonded region.

Further, the outside air introduction hole is disposed in a diameter-enlarged portion or a body portion of the outer layer body, and a recess is provided around the outside air introduction hole in the outer peripheral surface of the outer layer body,
And further comprising a connecting film for connecting both ends in the circumferential direction of the shrink film covering at least a part of the outer layer body and the cap body from the circumferential direction from the inner circumferential side,
The overlapping portion of the shrink film and the connecting film forms the overlapping region,
It is preferable that at least a part of the non-adhesion region is provided in a region overlapping the outside air introduction hole or the recess.

  Further, the shrink film has a film removal perforation extending downward from the upper end and a plurality of stopper perforations arranged in the vertical direction and extending in the circumferential direction, and the film removal perforation is formed at the lower end. Preferably, the plurality of stopper perforations are connected only to the uppermost stopper perforation, and the plurality of stopper perforations are disposed above the non-bonding region.

  The outer peripheral wall of the cap body is provided with a circumferential groove extending in the circumferential direction, and the shrink film has a film removal perforation extending downward from the upper end and a stopper perforation extending in the circumferential direction. The film removing perforation is connected to the stopper perforation at a lower end, and the stopper perforation is disposed in a region overlapping the circumferential groove and disposed above the non-adhesive region. Preferably it is.

  In addition, the shrink film is disposed adjacent to a lower portion of the perforation for film removal extending in the downward direction from the upper end, a perforation for stopper extending in the circumferential direction, and fixed to the cap main body. A perforation for removing the film is connected to the perforation for the stopper at a lower end, and the perforation for the stopper is disposed above the non-adhesion region. preferable.

  Further, it is preferable that the film removal perforation extends in a spiral shape from the upper end downward.

  According to the double container of the present invention, it is possible to have the function of the outside air introduction valve with a simple configuration.

(A) is a front fragmentary sectional view which shows the double container which concerns on 1st Embodiment of this invention, (b) is an arrow line view along the arrow A of (a), (c) is It is sectional drawing which follows the BB cross section in (a). It is a figure which shows the structural example of the shrink film which covers a cap main body. It is a figure which shows the structural example of the shrink film which covers a cap main body. It is a figure which shows the structural example of the shrink film which covers a cap main body. It is a figure which shows the structural example of the shrink film which covers a cap main body. (A) is a front view which shows the double container which concerns on 2nd Embodiment of this invention, (b) is sectional drawing which follows the CC cross section in (a). It is an enlarged front view of the through hole (outside air introduction hole) portion of the double container according to the third embodiment of the present invention. (A) is an enlarged front view of the through-hole (outside air introduction hole) part of the double container which concerns on 4th Embodiment of this invention, (b) is a plane sectional view of the shrink film part in (a). is there.

  Hereinafter, the present invention will be described more specifically with reference to the drawings.

  Fig.1 (a) is front partial sectional drawing which shows the structure of the double container 100 which is 1st Embodiment of this invention. The double container 100 includes a double container main body 2, a cap main body 10, an inner plug 20, a lid body 50, and a shrink film 60. The double container body 2 includes an inner layer body 3 and an outer layer body 4. In the present specification, claims, abstract, and drawings, the side on which the lid 50 described later is located is the upper side (the upper side in FIG. 1A), and the side on which the bottom of the double container body 2 is located. Is the lower side (lower side in FIG. 1A).

  First, the double container body 2 will be described. In the present embodiment, the double container main body 2 is formed by extruding and blowing a delamination container on a parison formed by laminating the synthetic resin material of the inner layer body 3 and the synthetic resin material of the outer layer body 4. Forming. And the material of the inner layer body 3 which comprises the double container main body 2 uses ethylene-vinyl alcohol copolymer resin (EVOH) or nylon. When EVOH is used for the inner layer body 3, the inner layer body 3 may be formed by further laminating a modified polyolefin resin such as polyethylene resin or Admer (registered trademark) inside the EVOH. Further, the material of the outer layer body 4 is made of low density polyethylene (LDPE) or high density polyethylene resin (HDPE). In particular, when LDPE is used, high squeeze properties can be imparted. However, the present invention is not limited to this mode. For example, when forming a delamination container by performing biaxial stretch blow molding, polypropylene (PP) is used as the material of the inner layer body 3, and the material of the outer layer body 4 is used. Polyethylene terephthalate (PET) may be used. Further, as the material of the inner layer body 3 and the outer layer body 4, other resins having low compatibility with each other can be used. Further, the double container main body 2 may be formed by assembling the outer layer body 4 and the inner layer body 3 separately instead of the laminated peeling container. Although not shown, one or a plurality of adhesive bands extending in the vertical direction and partially joining the inner layer body 3 and the outer layer body 4 between the inner layer body 3 and the outer layer body 4. May be provided.

  The inner layer body 3 is formed so as to be capable of volume reduction deformation. In this embodiment, the inner layer body 3 is obtained by peeling the double container body 2 formed in a laminated state from the outer layer body 4. . The inner layer body 3 includes an accommodation space S that accommodates contents inside and an upper opening 3 a that is connected to the accommodation space S.

  The outer layer body 4 has a cylindrical mouth peripheral wall 4a (mouth part), a diameter-enlarging part that is continuous with the mouth-periphery wall 4a, and a diameter-expanding part. A flexible body portion and a bottom portion for closing the lower end of the body portion are connected. A male screw portion 4b is provided on the outer peripheral surface of the mouth peripheral wall 4a. Further, the mouth peripheral wall 4a is provided with a through hole 4c for taking in air between the inner layer body 3 and the outer peripheral surface provided with the through hole 4c is provided with a male screw part 4b in the vertical direction. A notched groove 4d is provided.

  Next, the cap body 10 constituting the double container 100 will be described. The cap body 10 includes an outer peripheral wall 11 surrounding the mouth peripheral wall 4a, and an internal thread portion 12 corresponding to the male screw portion 4b of the mouth peripheral wall 4a is formed on the inner peripheral surface of the outer peripheral wall 11. A top wall (not shown) is integrally connected to the upper portion of the outer peripheral wall 11. A pouring tube is provided on the top surface of the top wall, and a pouring hole for pouring the contents is formed on the inner peripheral surface of the pouring tube.

  A gap G is formed between the lower end portion 11b of the outer peripheral wall 11 of the cap body 10 and the enlarged diameter portion of the double container body 2 as shown in FIG. As will be described later, the double container 100 passes from the outside to the space between the outer layer body 4 and the inner layer body 3 via the non-adhesive region 61a formed in the shrink film 60, the gap G, and the through hole 4c. Outside air can be introduced. In the present embodiment, the outer peripheral wall 11 is configured to cover only a part of the outer peripheral side of the mouth peripheral wall 4a, but is not limited to this aspect. You may comprise so that the outer peripheral wall 11 may cover the whole opening part surrounding wall 4a, and the lower end part 11b may be extended to the diameter expansion part vicinity of the outer layer body 4. FIG.

  An inner plug 20 is provided on the inner peripheral side of the cap body 10. The inner plug 20 is located between the pouring hole and the inner layer body 3, and a check valve (not shown) is provided at the center thereof. When the pressure in the inner layer body 3 increases due to the squeeze of the outer layer body 4, the valve body of the check valve is lifted upward in FIG. 1 (a) by the pressure and separated from the valve seat, and the check valve is opened. Become. When the squeeze of the outer layer body 4 is released, the valve body again comes into contact with the valve seat by the weight of the valve body and the elastic force of the check valve arm that supports the valve body, and the check valve is closed. An annular seal wall 26 that sandwiches the inner layer body 3 with the outer layer body 4 is provided on the lower surface of the inner plug 20.

  As shown in FIG. 1A, the lid 50 is connected to the outer peripheral wall 11 of the cap body 10 via a hinge 51, and can be covered with the pouring hole by being bent by the hinge 51. More specifically, the lid 50 includes a flat plate-like upper wall 52 and a lid peripheral wall 53 that is connected to the edge of the upper wall 52 and is continuous with the outer peripheral wall 11. A gripping portion 58 protruding in the outer peripheral direction is provided at the upper end of the lid peripheral wall 53 on the side facing the hinge 51 on the circumference. The user grips the gripping portion 58 and holds the lid 50. It can be lifted upward to open it, or it can be pushed down to close it. Note that the lid 50 may be configured separately from the cap body 10 without providing the hinge 51, and may be configured to be attached to the cap body 10 with screws or undercuts.

  The shrink film 60 is formed of a plastic film that shrinks by heat, and is in close contact with the outer peripheral surface of the outer layer body 4 by wrapping and heating the outer layer body 4. The shrink film 60 is used for the purpose of protecting the double container body 2 from dirt and scratches, maintaining the strength and shape, and printing the trademark and a design that draws attention to the customer and gives an impression to the shrink film 60 itself. By doing so, the market value of the product can be improved. Moreover, as shown in FIG. 2, it can have a virgin seal function (unopening guarantee function) by covering with the shrink film 60 including the cover body 50 of the double container 100 in an unused state.

  In the present embodiment, the shrink film 60 covers a part of the cap body 10 and a part of the enlarged diameter part, the trunk part, and the bottom part of the outer layer body 4. And the shrink film 60 has covered the clearance gap G part of the lower end part 11b of the above-mentioned outer peripheral wall 11, and the enlarged diameter part of the double container main body 2. FIG.

  The shrink film 60 covers a part of the outer layer body 4 and the cap body 10 in the circumferential direction from the outside. And the shrink film 60 is adhere | attached in the state which mutually overlapped the circumferential direction both ends, and the overlapped part forms the overlap area | region 61 shown in FIG.1 (b). As shown in FIG. 1B, the overlapping region 61 is bonded to the bonding region 61b (indicated by hatching in FIG. 1B) where the overlapping portions are bonded to each other, and the overlapping portion is bonded to each other. And a non-adhesive region 61a that can be separated in the thickness direction. That is, since the overlapping portions of the bonding region 61b in FIG. 1B are bonded to each other, air does not leak outside through this portion. On the other hand, in the non-adhesive region 61a, the overlapped portions are not adhered to each other and can be separated in the thickness direction, so that air slightly passes through the vent holes between the separated films in the non-adhesive region 61a. It can pass. And in the part which covers this clearance gap G of the shrink film 60, as shown in FIG.1 (b), the non-bonding area | region 61a is arrange | positioned. In the present embodiment, the upper end of the space between the mouth peripheral wall 4 a and the outer peripheral wall 11 is sealed by the inner plug 20, while the lower end is sealed by the shrink film 60. Therefore, the through hole 4 c communicates with the outside only through the vent hole in the non-adhesive region 61 a provided in the shrink film 60. And even if the air hole of the non-adhesion area | region 61a presses the trunk | drum of the double container main body 2, the film of the inner peripheral side of the non-adhesion area | region 61a presses the film of an outer peripheral side with the positive pressure which arises in the clearance gap G. Therefore, the vent hole in the non-adhesion region 61a is closed. Therefore, the non-adhesion region 61a hardly discharges the air in the space between the outer layer body 4 and the inner layer body 3 to the outside. On the other hand, when the pressing of the body portion of the double container main body 2 is stopped, the film on the inner peripheral side of the non-adhesive region 61a is separated from the film on the outer peripheral side by the negative pressure generated in the gap G (shown in FIG. 1 (c)). State), the vent hole in the non-adhesion region 61a is opened. Note that the height and circumferential width of the non-adhesion region 61a can be arbitrarily set according to the volume of the double container 100 and the like.

  In the initial state before use, the shrink film 60 also covers the entire cap body 10 and a part of the lid 50 (see FIG. 2). As shown in FIG. 1A, the user removes the cap film 63 along the film removal perforations 65 and the stopper perforations 67a of the shrink film 60 during use, as will be described later. Since the lid 50 and a part of the cap body 10 are exposed, the lid 50 is opened and the contents can be discharged from the dispensing hole.

  The shrink film 60 can be formed of, for example, a polystyrene (PS) film, a polyethylene terephthalate (PET) film, a polypropylene (PP) film, or a polyvinyl chloride (PVC) film.

  In discharging the contents from the double container 100 configured as described above, the user opens the lid 50 from the state shown in FIG. 1A and positions the double container body 2 from the standing position to the tilted position. It changes and presses (squeezes) the trunk | drum of the outer layer body 4. FIG. Thereby, the accommodation space S is pressurized via the air between the inner layer body 3 and the outer layer body 4. As described above, when the body part of the outer layer body 4 is pressed, the positive pressure generated in the space and the gap G between the outer layer body 4 and the inner layer body 3 causes the inner peripheral side of the non-adhesive region 61a to be Since the film presses the film on the outer peripheral side, the air holes in the non-adhesion region 61a are closed. Therefore, almost no air is discharged from the vent hole in the non-bonding region 61a via the through hole 4c and the gap G. Accordingly, even when the outer layer body 4 is pressed, there is almost no air leaking from the vent holes in the non-adhesive region 61a in the air between the inner layer body 3 and the outer layer body 4, and therefore the pressurization to the accommodation space S is not performed. There is no inhibition. And since the positive pressure in the accommodation space S lifts the valve body of the check valve, the content flows out through the check valve and is poured out through the pouring hole.

  After the required amount of content has been poured out, the user releases the pressure on the body of the outer layer body 4. As a result, the positive pressure in the storage space S returns to the external pressure and the check valve is closed again, so that the entry of outside air into the storage space S can be prevented. Further, since the outer layer body 4 tries to return to its original shape by its own restoring force, the space between the inner layer body 3 and the outer layer body 4 becomes a negative pressure. As a result, a negative pressure is also generated in the gap G through the through hole 4c. Since the film on the inner peripheral side of the non-adhesive region 61a is separated from the film on the outer peripheral side by this negative pressure (the state shown in FIG. 1C), the air holes in the non-adhesive region 61a are opened. Accordingly, outside air is introduced through the vent holes of the non-adhesion region 61a. The introduced outside air is supplied to the space between the outer layer body 4 and the inner layer body 3 via the gap G and the through hole 4c. Thereby, the outer layer body 4 can be restored while the inner layer body 3 is deformed and deformed.

  In the present embodiment, the non-adhesive region 61a is disposed so as to be included in the portion covering the gap G of the shrink film 60, but is not limited to this aspect. You may arrange | position so that only a part of the up-down direction of the non-adhesion area | region 61a may be contained in the part which covers the gap | interval G. Further, the non-adhesion region 61a may extend beyond the portion covering the gap G.

  Moreover, although this embodiment demonstrated the case where there was no adhesive band extended in the up-down direction which joins the inner layer body 3 and the outer layer body 4, or provided one adhesive band, two adhesive bands are provided. If provided, the space between the outer layer body 4 and the inner layer body 3 is divided into two, so that it is necessary to provide an overlapping region 61 and a non-adhesive region 61a for each of the two spaces. Therefore, when two adhesive bands are provided, the two shrink films 60 may be bonded by overlapping the two end portions so as to provide two overlapping regions 61 extending vertically.

  By the way, as mentioned above, the shrink film 60 covers the entire cap body 10 and a part of the lid 50 in the initial state before use. In FIG. 2, an example of a structure of the shrink film 60 in the initial state before use is shown.

  In the example of FIG. 2, the upper part of the outer peripheral wall 11, the entire cover peripheral wall 53, and the outer peripheral part of the upper wall 52 of the shrink film 60 are covered. Two extending film removal perforations 65 are provided. The lower end of the film removal perforation 65 is connected to a stopper perforation 67a extending in the circumferential direction. Two stopper perforations 67b and 67c are further provided below the stopper perforations 67a. The three stopper perforations 67a to 67c extend in the circumferential direction in a state of being parallel to each other while being slightly separated in the vertical direction. The three stopper perforations 67a to 67c are formed above the non-bonding region 61a.

  The user grasps the upper end of the shrink film 60 and removes the cap film 63 along the film removal perforation 65 and the stopper perforation 67a. As a result, as shown in FIG. 1 (a), the lid 50 and a part of the cap body 10 are exposed, so that the user can open the lid 50 and discharge the contents from the dispensing hole. . Further, the user can determine whether or not the double container 100 is in an unopened state based on the presence or absence of the cap film 63.

  In addition, when a user cuts down the shrink film 60 vigorously along the film removal perforation 65, a crack runs in the circumferential direction along the stopper perforation 67a from the lower end of the film removal perforation 65. In addition, a crack may run downward beyond the stopper perforation 67a. However, even in such a case, since the user pulls the shrink film 60 downward, the crack is weakened by running through a strong portion between the perforations 67a and 67b for the stopper. After reaching the perforation 67b, the cap film 63 can be removed in the circumferential direction along the stopper perforation 67b. In the present embodiment, since the stopper perforation 67c is further provided below the stopper perforation 67b in advance, the crack does not extend beyond the stopper perforation 67c. Therefore, when the user removes the cap film 63 before using the double container 100 for the first time, the function of the outside air introduction valve is not impaired by accidentally removing even the non-adhesion region 61a.

  The film removing perforations 65 extending downward from the upper end of the shrink film 60 are not limited to those extending in the vertical direction. Even if the film removal perforation 65 is inclined with respect to the vertical direction, the cap film can be used without affecting the non-adhesive region 61a if the lower end of the film removal perforation 65 is connected to the stopper perforation 67a. This is because the 63 portion can be similarly removed.

  Further, in the present embodiment, the stopper perforations 67a to 67c are configured to extend in the horizontal direction and the circumferential direction, but are not limited to this aspect. The cap film 63 may be inclined with respect to the horizontal direction as long as the cap film 63 can be removed when it is cut by one turn in the circumferential direction along the stopper perforations 67a to 67c.

  FIG. 3 shows another configuration example of the shrink film 70 in an initial state before use. In the example of FIG. 3, as compared with FIG. 2, the film removal perforation 75 has an inclination with respect to the vertical direction, and extends downward while drawing a spiral and is connected to the stopper perforation 77a. . Further, a stopper perforation 77b extends in parallel under the stopper perforation 77a. In the example of FIG. 3 as well, the two stopper perforations 77a and 77b are formed above the non-bonding region.

  The user grips the upper end of the shrink film 70 and removes the cap film 73 along the film removal perforations 75 and the stopper perforations 77a. As a result, as shown in FIG. 1 (a), the lid 50 and a part of the cap body 10 are exposed, so that the user can open the lid 50 and discharge the contents from the dispensing hole. . Further, the user can determine whether or not the double container 100 is in an unopened state based on the presence or absence of the cap film 73.

  In the example of FIG. 3, even if the user severly cuts the shrink film 70 along the film removal perforations 75, the film removal perforations 75 and the stopper perforations 77a are Since they are connected at a shallow angle as compared with the example of FIG. 2, it is possible to shift from the cutting along the film removal perforation 75 relatively smoothly to the cutting along the stopper perforation 77a. In the unlikely event that a crack runs in the circumferential direction along the stopper perforation 77a, the user pulls the shrink film 70 downward even if the crack runs below the stopper perforation 77a. The momentum is weakened by the crack running through a strong portion between the stopper perforations 77a and 77b. It can be removed in the circumferential direction. Therefore, when the user removes the cap film 73 before using the double container 100 for the first time, the function of the outside air introduction valve is not impaired by mistakenly removing the non-adhesive region.

  FIG. 4 shows another configuration example of the shrink film 80 in an initial state before use. In the example of FIG. 4, as compared with FIG. 2, only one stopper perforation 87 a is provided, and the stopper perforation 87 a overlaps the circumferential groove 18 a provided in the outer peripheral wall 11 of the cap body 10. Is arranged. In the example of FIG. 4 as well, the stopper perforation 87a is formed above the non-bonding region.

  The user grasps the upper end of the shrink film 80 and removes the cap film 83 along the film removal perforations 85 and the stopper perforations 87a. As a result, as shown in FIG. 1 (a), the lid 50 and a part of the cap body 10 are exposed, so that the user can open the lid 50 and discharge the contents from the dispensing hole. . Further, the user can determine whether or not the double container 100 is in an unopened state based on the presence or absence of the cap film 83.

  In the example of FIG. 4, even if the user pulls the shrink film 80 down and vigorously along the film removal perforations 85, the film removal perforations 85 are formed in the circumferential grooves 18a. Since the film is oriented in the circumferential direction, an angle is generated between the direction in which the shrink film 80 is pulled and the direction in which the film removal perforation 85 runs. Accordingly, since the force to tear the film removal perforation 85 in the circumferential groove 18a is weakened, after the crack reaches the stopper perforation 87a, there is no further downward crack and the stopper perforation 87a The cap film 83 can be removed along the circumferential direction. Therefore, when the user removes the cap film 83 before using the double container 100 for the first time, the function of the outside air introduction valve is not impaired by mistakenly removing the non-adhesive region.

  In the example of FIG. 4, a further circumferential groove 18b that runs in parallel below the circumferential groove 18a is provided. However, an additional stopper perforation may be provided so as to overlap the circumferential groove 18b. . Thereby, the loss of the function of the outside air introduction valve due to the erroneous removal of the shrink film 80 up to the non-adhesive region can be more reliably suppressed.

  FIG. 5 shows another configuration example of the shrink film 90 in an initial state before use. In the example of FIG. 5, as compared with FIG. 2, an adhesive fixing region 19 is provided instead of the stopper perforations 67 b and 67 c. That is, as shown in FIG. 5, the lower end of the film removing perforation 95 is connected to the stopper perforation 97a, and the adhesive fixing region 19 is provided adjacent to the lower side of the stopper perforation 97a. The shrink film 90 and the outer peripheral wall 11 are adhesively fixed in the adhesive fixing region 19. In the example of FIG. 5 as well, the stopper perforation 97a is formed above the non-bonding region.

  The user grasps the upper end of the shrink film 90 and removes the cap film 93 along the film removal perforations 95 and the stopper perforations 97a. As a result, as shown in FIG. 1 (a), the lid 50 and a part of the cap body 10 are exposed, so that the user can open the lid 50 and discharge the contents from the dispensing hole. . Further, the user can determine whether or not the double container 100 is in an unopened state based on the presence or absence of the cap film 93.

  In the example of FIG. 5, even if the user pulls the shrink film 90 downward along the film removal perforations 95 and cuts it, the adhesive fixing region is located below the stopper perforations 97a. Since 19 is provided, the crack does not run through the adhesive fixing region 19 further downward. Therefore, after the crack reaches the lower end of the film removal perforation 95, the cap film 93 can be removed in the circumferential direction along the stopper perforation 97a. Therefore, when the user removes the cap film 93 before using the double container 100 for the first time, the function of the outside air introduction valve is not impaired by mistakenly removing the non-adhesive region.

  As described above, according to the present embodiment, in the double container 100 including the inner layer body 3 that contains the contents and the squeezable outer layer body 4 that houses the inner layer body 3, the through hole 4 c is formed in the outer layer body 4. (Outside air introduction hole) and a non-adhesive region 61a is provided in the circumferential overlap portion (overlap region 61) of the shrink film 60 that covers the outer layer body 4 from the outside. The outside air was introduced into the space between the outer layer body 4 and the inner layer body 3 via both 4c. Accordingly, it is not necessary to newly incorporate a member having the function of the outside air introduction valve, and the overlapping area 61 of the shrink film 60 can have the function of the outside air introduction valve, so that the number of parts can be reduced and manufactured at a low cost. Can do.

  In addition, according to the present embodiment, the through hole 4c is configured to communicate with the outside only through the vent hole of the non-adhesive region 61a, so that the inner layer body 3 and the outer layer body 4 are not pressed when the body portion is pressed. Therefore, it is possible to efficiently pressurize the accommodation space S and discharge the contents.

  Further, according to the present embodiment, the through-hole 4c is provided in the mouth peripheral wall 4a, and the shrink film 60 is configured to bridge the gap G between the lower end 11b of the cap body 10 and the outer layer body 4, and is not bonded. The region 61a is arranged so as to overlap the bridge region. Accordingly, the function of the outside air introduction valve can be concentrated around the mouth portion with a simple configuration, so that it is possible not to affect the pressing of the trunk portion.

  In addition, according to the present embodiment, the film removing perforation 65 extending downward from the upper end of the shrink film 60 and the three stopper perforations 67a to 67c extending in the circumferential direction are provided in a state before use. The lower end of the film removal perforation 65 is connected to the stopper perforation 67a, and the three stopper perforations 67a to 67c are arranged above the non-bonding region 61a. As a result, even if the user pulls the shrink film 60 downward vigorously and cuts it, the force of pulling the shrink film 60 downward is weakened by the fact that the crack runs through a strong portion between the stopper perforations 67a and 67b. Therefore, after the crack reaches the stopper perforation 67b, the cap film 63 can be removed in the circumferential direction along the stopper perforation 67b. Accordingly, the cap film 63 can be removed along the film removing perforation 65 and the stopper perforation 67a or 67b, and the function of the outside air introduction valve can be impaired by removing it to the non-adhesive region 61a by mistake. Absent.

  Further, according to the present embodiment, the outer peripheral wall 11 of the cap body 10 is provided with the circumferential groove 18a extending in the circumferential direction, and the shrink film 80 includes a film removing perforation 85 extending downward from the upper end, A perforation for stopper 87a extending in the circumferential direction, the perforation 85 for film removal is connected to the perforation 87a for stopper at the lower end, and the perforation 87a for stopper is disposed in a region overlapping the circumferential groove 18a; And it comprised so that it might arrange | position above a non-bonding area | region. As a result, even when the user pulls the shrink film 80 downward vigorously and cuts it, there is an angle between the direction in which the shrink film 80 is pulled and the direction in which the film removal perforation 85 runs in the circumferential groove 18a. In 18a, the force to tear the film removal perforations 85 is weakened. Therefore, after the crack reaches the stopper perforation 87a, the cap film 83 can be removed along the film removal perforation 85 and the stopper perforation 87a without further cracking. it can. Therefore, the function of the outside air introduction valve is not impaired by accidentally removing even the non-adhesion region.

  Further, according to the present embodiment, the shrink film 90 is adjacent to the film removal perforation 95 extending downward from the upper end, the stopper perforation 97a extending in the circumferential direction, and the stopper perforation 97a. The film fixing perforation 95 is connected to the stopper perforation 97a at the lower end, and the stopper perforation 97a is connected to the non-adhesive region. It was comprised so that it might be arranged above. Thus, even if the user pulls the shrink film 90 down vigorously along the film removal perforation 95 and cuts it, the adhesive fixing region 19 is provided below the stopper perforation 97a. For this reason, the crack does not run vertically downward through the adhesive fixing region 19. Accordingly, the cap film 93 can be removed along the film removing perforations 95 and the stopper perforations 97a, and the function of the outside air introduction valve is not impaired by accidentally removing even the non-adhesive region.

  Further, according to the present embodiment, the film removal perforation 75 is configured to extend spirally downward from the upper end. Accordingly, since the film removal perforation 75 and the stopper perforation 77a are connected at a shallow angle, the cutting along the film perforation 77a from the film removal perforation 77a is relatively smooth. Can be moved to. Accordingly, the cap film 73 can be removed along the film removing perforations 75 and the stopper perforations 77a, and the function of the outside air introduction valve is not impaired by accidentally removing even the non-adhesive region.

  Next, the double container 200 which is 2nd Embodiment of this invention is demonstrated concretely with reference to Fig.6 (a), (b). The double container 200 according to the second embodiment is different from the first embodiment in that the through-hole 104c and the non-adhesion region 161a are provided in the enlarged diameter portion instead of being provided in the mouth peripheral wall 4a of the double container body 2. Other than that, it is similar to the configuration of the first embodiment. Therefore, here, detailed description will be made focusing on differences from the first embodiment.

  Fig.6 (a) is a front view which shows the double container 200 which concerns on 2nd Embodiment of this invention. A through hole 104 c for taking in air between the outer layer body 104 and the inner layer body 3 is provided in the enlarged diameter portion of the outer layer body 104. In addition, a rectangular recess 104g is provided around the through hole 104c as shown in FIG. Accordingly, the through-hole 104c is formed at a position lowered from the outer peripheral surface of the outer layer body 104 by the depth of the recess 104g in the inner peripheral direction as shown in FIG. 6 (b). A shrink film 160 is tightly fixed to the outer peripheral surface of the outer layer body 104 by heat shrinkage. The shrink film 160 covers a part of the cap body 10 and a part of the enlarged diameter portion, the trunk portion, and the bottom portion of the outer layer body 104. Then, both ends in the circumferential direction of the shrink film 160 are bonded in an overlapping state, and the overlapped portion forms an overlapping region 161 shown in FIGS. 6 (a) and 6 (b). As shown in FIG. 6A, the overlapping region 161 is bonded to the bonding region 161b (indicated by hatching in FIG. 6A) where the overlapping portions are bonded to each other, and the overlapping portion is bonded to each other. And a non-adhesive region 161a that can be separated in the thickness direction. That is, since the overlapping portions of the bonding region 161b in FIG. 6A are bonded to each other, air does not leak to the outside through this portion. On the other hand, in the non-adhesive region 161a, the overlapping portions are not adhered to each other and can be separated in the thickness direction, so that the air slightly passes through the air holes between the separated films in the non-adhesive region 161a. It can pass. And in the area | region which overlaps with the through-hole 104c and the recessed part 104g, as shown to Fig.6 (a), the non-bonding area | region 161a is arrange | positioned. Therefore, the through hole 104c communicates with the outside only through the vent hole of the non-adhesion region 161a. The vent hole of the non-adhesive region 161a is located on the inner peripheral side of the non-adhesive region 161a due to the positive pressure generated in the space between the outer layer body 104 and the inner layer body 3 even when the body of the double container body 102 is pressed. Since the film presses the film on the outer peripheral side, the air holes in the non-adhesion region 161a are closed. Therefore, the non-adhesion region 161a hardly discharges the air in the space between the outer layer body 104 and the inner layer body 3 to the outside. On the other hand, when the pressing of the body portion of the double container main body 102 is stopped, the film on the inner peripheral side of the non-adhesive region 161a is separated from the film on the outer peripheral side by the negative pressure generated in the space between the outer layer body 104 and the inner layer body 3. In order to do so (the state shown in FIG. 6B), the air holes in the non-adhesion region 161a are opened. Note that the height and circumferential width of the non-adhesion region 161a can be arbitrarily set according to the volume of the double container 200 and the like.

  When discharging the contents from the double container 200 configured as described above, the user opens the lid 50 from the state shown in FIG. 6A and positions the double container main body 102 from the standing position to the inclined position. It changes and presses (squeezes) the trunk | drum of the outer layer body 104. FIG. Thereby, the accommodation space S is pressurized via the air between the inner layer body 3 and the outer layer body 104. As described above, when the body portion of the outer layer body 104 is pressed, the film on the inner peripheral side of the non-adhesive region 161a is surrounded by the positive pressure generated in the space between the outer layer body 104 and the inner layer body 3. In order to press the film on the side, the air holes in the non-adhesive region 161a are closed. Therefore, almost no air is discharged through the through hole 104c and the vent hole of the non-adhesion region 161a. Therefore, even if the outer layer body 104 is pressed, there is almost no air leaking from the air holes of the non-adhesion region 161a in the air between the inner layer body 3 and the outer layer body 104, and therefore the pressurization to the accommodation space S is not performed. There is no inhibition. And since the positive pressure in the accommodation space S lifts the valve body of the check valve, the content flows out through the check valve and is poured out through the pouring hole.

  After the required amount of content has been poured out, the user releases the pressure on the body of the outer layer body 104. As a result, the positive pressure in the storage space S returns to the external pressure and the check valve is closed again, so that the entry of outside air into the storage space S can be prevented. Moreover, since the outer layer body 104 tends to return to its original shape by its own restoring force, the space between the inner layer body 3 and the outer layer body 104 becomes a negative pressure. As a result, the space between the through hole 104c and the non-adhesion region 161a, that is, the recess 104g also becomes negative pressure. Because the negative pressure separates the film on the inner peripheral side of the non-adhesive region 161a from the film on the outer peripheral side (the state shown in FIG. 6B), the air holes in the non-adhesive region 161a are opened. Accordingly, outside air is introduced through the vent holes of the non-adhesion region 161a. The introduced outside air is supplied to the space between the outer layer body 104 and the inner layer body 3 through the through hole 104c. Thereby, the outer layer body 104 can be restored while the inner layer body 3 is deformed and reduced in volume.

  In the present embodiment, the through hole 104c and the concave portion 104g are provided in the enlarged diameter portion of the outer layer body 104. However, the present invention is not limited to this aspect, and is covered with the shrink film 160 such as being provided in the body portion of the outer layer body 104. It can be provided in any region.

  In the present embodiment, the concave portion 104g is formed in a rectangular shape, but the present invention is not limited to this aspect, and various other shapes such as a circular shape and an elliptical shape can be adopted.

  Further, in the present embodiment, the non-adhesion region 161a is disposed so as to be included in a portion overlapping the through hole 104c or the recess 104g, but the present invention is not limited to this aspect. You may arrange | position so that only a part of the up-down direction of the non-adhesion area | region 161a may be contained in the part which overlaps with the through-hole 104c or the recessed part 104g. Further, the non-adhesion region 161a may extend beyond the through hole 104c or the recess 104g.

  As described above, in the double container 200 of the present embodiment, the through hole 104c and the concave portion 104g are provided in the enlarged diameter portion of the outer layer body 104, and the non-adhesive region 161a of the shrink film 160 overlaps the through hole 104c or the concave portion 104g. Configured. Accordingly, it is not necessary to newly incorporate a member having the function of the outside air introduction valve, and the shrink film 160 can have the function of the outside air introduction valve. Therefore, the number of components can be reduced and the manufacturing can be performed at a low cost. Further, by ensuring the area of the recess 104g to a certain extent, the alignment accuracy of the non-adhesion area 161a with respect to the outer layer body 104 can be relaxed. In the present embodiment, as shown in FIG. 6A, the longitudinal direction of the recess 104g is formed in the vertical direction as the longitudinal direction of the non-adhesive region 161a is in the vertical direction. The alignment accuracy of the region 161a can be moderated appropriately.

  In addition, according to the present embodiment, in a normal shrink film 160 mounting process in which the shrink film 160 is bonded in the circumferential direction, the outside air introduction valve is provided only by providing the non-adhesive region 161a in a part in the vertical direction. It can have the function of. Therefore, the change of the manufacturing equipment of the double container 200 can be suppressed as much as possible.

  In the present embodiment, the concave portion 104g is configured to have a shape that is long in the vertical direction. However, the present invention is not limited to this configuration, and the concave portion 104g may be configured to be long in the circumferential direction in accordance with the shape of the non-adhesive region 161a. .

  Next, the double container 300 which is 3rd Embodiment of this invention is demonstrated concretely with reference to FIG. Note that the double container 300 according to the third embodiment, instead of forming the overlapping region 161 and the non-adhesive region 161a by overlapping the circumferential ends of the shrink film 160 with each other, as compared with the second embodiment. The structure is the same as that of the second embodiment except that the valve body film 270 is disposed between the shrink film 260 and the outer layer body 104. Therefore, here, detailed description will be made focusing on differences from the second embodiment.

  FIG. 7 is an enlarged front view of the through hole 104c portion in the double container 300 according to the third embodiment of the present invention. A through hole 104 c for taking in air between the outer layer body 104 and the inner layer body 3 is provided in the enlarged diameter portion of the outer layer body 104. In addition, a rectangular recess 104g is provided around the through hole 104c as shown in FIG. Accordingly, the through-hole 104c is formed at a position that is lowered from the outer peripheral surface of the outer layer body 104 by the depth of the recess 104g in the inner peripheral direction. A shrink film 260 is tightly fixed to the outer peripheral surface of the outer layer body 104 by heat shrinkage. The shrink film 260 covers a part of the cap body 10 and a part of the enlarged diameter part, the trunk part, and the bottom part of the outer layer body 104.

  As shown in FIG. 7, a valve body film 270 is disposed between the shrink film 260 and the outer layer body 104. The overlapping region between the shrink film 260 and the valve body film 270 includes an adhesive region 270b (indicated by hatching in FIG. 7) where the shrink film 260 and the valve body film 270 are bonded to each other, and the shrink film 260 and the valve body film 270. Are not bonded to each other and are formed of a non-bonded region 270a that can be separated in the thickness direction. The non-adhesion region 270a is a film slit in which the shrink film 260 and the valve body film 270 are not adhered to each other and can be separated from each other in the thickness direction. 261 is provided. Therefore, air can slightly pass through the space between the shrink film 260 and the valve element film 270 in the non-adhesion region 270 a and the film slit 261. And in the area | region which overlaps with the through-hole 104c and the recessed part 104g, as shown in FIG. 7, the non-bonding area | region 270a is arrange | positioned. Accordingly, the through-hole 104c communicates with the outside through the space between the two films in the non-adhesion region 270a and the film slit 261. The space between the two films in the non-adhesion region 270a is not bonded to the non-adhesion region 270a due to the positive pressure generated by the space between the outer layer body 104 and the inner layer body 3 even when the body of the double container body 102 is pressed. Since the valve body film 270 presses the shrink film 260 from the inside, the space between the two films in the non-adhesive region 270a is closed. Therefore, the non-adhesion region 270a hardly discharges the air in the space between the outer layer body 104 and the inner layer body 3 to the outside. On the other hand, when the pressing of the body portion of the double container main body 102 is stopped, the valve body film 270 in the non-adhesive region 270a is separated from the shrink film 260 by the negative pressure generated in the space between the outer layer body 104 and the inner layer body 3. The space between the two films in the non-adhesion region 270a is opened. Note that the height and circumferential width of the non-adhesion region 270a can be arbitrarily set according to the volume of the double container 300 and the like.

  In discharging the contents from the double container 300 configured as described above, the user changes the posture of the double container main body from the standing posture to the tilted posture, and presses (squeezes) the body portion of the outer layer body 104. To do. Thereby, the accommodation space S is pressurized via the air between the inner layer body 3 and the outer layer body 104. As described above, when the body portion of the outer layer body 104 is pressed, the valve body film 270 in the non-adhesion region 270a is shrunk by the positive pressure generated in the space between the outer layer body 104 and the inner layer body 3. In order to press 260 from the inner peripheral side, the space between the two films in the non-adhesion region 270a is closed. Therefore, almost no air is discharged through the space between the two films in the non-adhesion region 270a and the film slit 261 via the through hole 104c. Therefore, even if the outer layer body 104 is pressed, there is almost no air leaking from the space between the two films in the non-adhesive region 270a in the air between the inner layer body 3 and the outer layer body 104. The pressurization of is not inhibited. And since the positive pressure in the accommodation space S lifts the valve body of the check valve, the content flows out through the check valve and is poured out through the pouring hole.

  After the required amount of content has been poured out, the user releases the pressure on the body of the outer layer body 104. As a result, the positive pressure in the storage space S returns to the external pressure and the check valve is closed again, so that the entry of outside air into the storage space S can be prevented. Moreover, since the outer layer body 104 tends to return to its original shape by its own restoring force, the space between the inner layer body 3 and the outer layer body 104 becomes a negative pressure. As a result, the space between the through hole 104c and the non-adhesion region 270a, that is, the recess 104g also becomes negative pressure. Because the negative pressure separates the valve body film 270 in the non-adhesion region 270a from the shrink film 260, the space between the two films in the non-adhesion region 270a is opened. Therefore, outside air is introduced through the space between the film slit 261 and the two films in the non-adhesion region 270a. The introduced outside air is supplied to the space between the outer layer body 104 and the inner layer body 3 through the through hole 104c. Thereby, the outer layer body 104 can be restored while the inner layer body 3 is deformed and reduced in volume.

  In the present embodiment, the through hole 104c and the concave portion 104g are provided in the enlarged diameter portion of the outer layer body 104. However, the present invention is not limited to this aspect, and is covered with the shrink film 260 such as being provided in the trunk portion of the outer layer body 104. It can be provided in any region.

  In the present embodiment, the concave portion 104g is formed in a rectangular shape, but the present invention is not limited to this aspect, and various other shapes such as a circular shape and an elliptical shape can be adopted.

  Further, in the present embodiment, the non-adhesion region 270a is disposed so as to be included in a portion overlapping the through hole 104c or the recess 104g, but is not limited to this mode. You may arrange | position so that only a part of the up-down direction of the non-adhesion area | region 270a may be contained in the part which overlaps with the through-hole 104c or the recessed part 104g. That is, the non-adhesion region 270a may extend beyond the through hole 104c or the recess 104g.

  As described above, in the double container 300 of the present embodiment, the through-hole 104 c and the recess 104 g are provided in the enlarged diameter portion of the outer layer body 104, and the valve body film 270 is disposed between the shrink film 260 and the outer layer body 104. The non-adhesion region 270a in the overlapping region between the shrink film 260 and the valve body film 270 is configured to overlap the through hole 104c or the recess 104g. Further, when a film slit 261 is provided on the shrink film 260 side in the non-adhesion region 270a and a negative pressure is generated in the space between the outer layer body 104 and the inner layer body 3 due to the release of the pressing of the body portion, the shrink in the non-adhesion region 270a. A space is generated between the film 260 and the valve body film 270, and the outside air can be introduced into the space between the outer layer body 104 and the inner layer body 3 from the film slit 261. That is, since the shrink film 260 can be provided with the function of an outside air introduction valve only by adding the valve body film 270 and the film slit 261, the number of components can be reduced and the manufacturing can be performed at a low cost. Further, by ensuring the area of the recess 104g to a certain extent, the alignment accuracy of the non-adhesion area 270a and the film slit 261 with respect to the outer layer body 104 can be relaxed. In the present embodiment, as shown in FIG. 7, the longitudinal direction of the recess 104 g is formed in the vertical direction as the longitudinal direction of the non-adhesive region 270 a is in the vertical direction. The alignment accuracy can be moderated appropriately.

  In this embodiment, in addition to opening and closing of the space between the two films in the non-adhesion region 270a, air leakage is also limited by the film slit 261. Therefore, when the body portion of the outer layer body 104 is pressed, Air leakage from the non-contact region 270a can be more reliably suppressed.

  In the present embodiment, the concave portion 104g is configured to have a shape that is long in the vertical direction. However, the present invention is not limited to this configuration, and the concave portion 104g may be configured to be long in the circumferential direction in accordance with the shape of the non-adhesive region 270a. .

  In the present embodiment, the right half of the valve body film 270 in FIG. 7 is the adhesive region 270b. However, the present invention is not limited to this mode. For example, the upper half of the valve body film 270 may be the adhesive region 270b.

  Next, the double container 400 which is 4th Embodiment of this invention is demonstrated concretely with reference to Fig.8 (a), (b). Note that the double container 400 according to the fourth embodiment is different from the second embodiment in that the circumferential direction of the shrink film 360 is used instead of bonding in a state where the circumferential ends of the shrink film 160 are overlapped with each other. Except for the configuration in which both end portions 360e are brought into contact and the corresponding contact portions are connected from the inner peripheral side by a connecting film 370 (see FIG. 8B), the configuration is similar to the configuration of the second embodiment. Therefore, here, detailed description will be made focusing on differences from the second embodiment.

  Fig.8 (a) is an enlarged front view of the through-hole 104c part in the double container 400 which concerns on 4th Embodiment of this invention. A through hole 104 c for taking in air between the outer layer body 104 and the inner layer body 3 is provided in the enlarged diameter portion of the outer layer body 104. Further, a rectangular recess 104g is provided around the through hole 104c as shown in FIG. Accordingly, the through-hole 104c is formed at a position that is lowered from the outer peripheral surface of the outer layer body 104 by the depth of the recess 104g in the inner peripheral direction. A shrink film 360 is tightly fixed to the outer peripheral surface of the outer layer body 104 by heat shrinkage. The shrink film 360 covers a part of the cap body 10 and a part of the enlarged diameter part, the trunk part, and the bottom part of the outer layer body 104. As shown in FIGS. 8A and 8B, both ends 360 e in the circumferential direction of the shrink film 360 are connected to each other by the connecting film 370 from the inner peripheral side and are connected to the shrink film 360. A portion where the film 370 overlaps forms an overlapping region 361. As shown in FIG. 8A, the overlapping region 361 includes an adhesive region 361b (indicated by hatching in FIG. 8A) in which the shrink film 360 and the connecting film 370 are bonded to each other, and the shrink film 360. The connection film 370 is not bonded to each other and is composed of a non-adhesion region 361a that can be separated in the thickness direction. That is, since the shrink film 360 and the connection film 370 are bonded to each other in the bonding region 361b of FIG. 8A, air does not leak outside through this portion. On the other hand, in the non-adhesive region 361a, the shrink film 360 and the connecting film 370 are not adhered to each other and can be separated from each other in the thickness direction. Air can slightly pass through the gap between the circumferential ends 360e. And in the area | region which overlaps with the through-hole 104c and the recessed part 104g, as shown to Fig.8 (a), a part of non-adhesion area | region 361a is arrange | positioned. Therefore, the through hole 104c communicates with the outside only through the vent hole of the non-adhesion region 361a. The vent hole in the non-adhesion region 361a is connected to the connecting film 370 in the non-adhesion region 361a due to the positive pressure generated in the space between the outer layer body 104 and the inner layer body 3 even when the trunk of the double container main body 102 is pressed. Presses the shrink film 360, so that the air holes in the non-adhesion region 361a are closed. Therefore, the non-adhesion region 361a hardly discharges the air in the space between the outer layer body 104 and the inner layer body 3 to the outside. On the other hand, when the pressing of the body portion of the double container main body 102 is stopped, the connection film 370 in the non-adhesive region 361a is separated from the shrink film 360 by the negative pressure generated in the space between the outer layer body 104 and the inner layer body 3, The vent hole in the non-adhesion region 361a is opened. The height and circumferential width of the non-adhesion region 361a can be arbitrarily set according to the volume of the double container 400 and the like.

  When discharging the contents from the double container 400 configured as described above, the user changes the posture of the double container main body 102 from the standing posture to the tilted posture, and presses the squeeze portion of the outer layer body 104 (squeeze). ) Thereby, the accommodation space S is pressurized via the air between the inner layer body 3 and the outer layer body 104. As described above, when the body portion of the outer layer body 104 is pressed, the connecting film 370 in the non-adhesive region 361a is caused to shrink by the positive pressure generated in the space between the outer layer body 104 and the inner layer body 3. Is pressed, the vent hole of the non-adhesion region 361a is closed. Therefore, almost no air is discharged from the vent hole in the non-adhesion region 361a via the through hole 104c. Therefore, even if the outer layer body 104 is pressed, there is almost no air leaking from the air holes in the non-adhesion region 361a in the air between the inner layer body 3 and the outer layer body 104, and therefore the pressurization to the accommodation space S is not performed. There is no inhibition. And since the positive pressure in the accommodation space S lifts the valve body of the check valve, the content flows out through the check valve and is poured out through the pouring hole.

  After the required amount of content has been poured out, the user releases the pressure on the body of the outer layer body 104. As a result, the positive pressure in the storage space S returns to the external pressure and the check valve is closed again, so that the entry of outside air into the storage space S can be prevented. Moreover, since the outer layer body 104 tends to return to its original shape by its own restoring force, the space between the inner layer body 3 and the outer layer body 104 becomes a negative pressure. As a result, the space between the through hole 104c and the non-adhesion region 361a, that is, the recess 104g also becomes negative pressure. Due to this negative pressure, the connection film 370 in the non-adhesion region 361a is separated from the shrink film 360, so that the air holes in the non-adhesion region 361a are opened. Therefore, outside air is introduced through the gap between the circumferential ends 360e and the vent hole of the non-adhesion region 361a. The introduced outside air is supplied to the space between the outer layer body 104 and the inner layer body 3 through the through hole 104c. Thereby, the outer layer body 104 can be restored while the inner layer body 3 is deformed and reduced in volume.

  In the present embodiment, the through hole 104c and the concave portion 104g are provided in the enlarged diameter portion of the outer layer body 104. However, the present invention is not limited to this aspect, and is covered with the shrink film 360 such as being provided in the trunk portion of the outer layer body 104. It can be provided in any region.

  In the present embodiment, the concave portion 104g is formed in a rectangular shape, but the present invention is not limited to this aspect, and various other shapes such as a circular shape and an elliptical shape can be adopted.

  In the present embodiment, the left part of the non-adhesion region 361a is arranged so as to be included in the part overlapping the through-hole 104c or the recess 104g in FIG. 8A, but this is not a limitation. You may arrange | position so that the whole non-adhesion area | region 361a may be contained in the part which overlaps with the through-hole 104c or the recessed part 104g. In the present embodiment, since air is taken into the left and right sides from the gap between the circumferential ends 360e of the shrink film 360 that abuts, it is only necessary that either the left or right of the circumferential ends 360e overlap the through hole 104c or the recess 104g. . In addition, the overlap between the non-adhesion region 361a and the through hole 104c or the recess 104g may be only a part of the non-adhesion region 361a in the vertical direction. Further, the non-adhesion region 361a may extend beyond the through hole 104c or the recess 104g.

  As described above, in the double container 400 of the present embodiment, the shrink film 360 and the connection film 370 are connected by the connection film 370 from the inner peripheral side in a state where the circumferential ends 360e of the shrink film 360 are in contact with each other. The overlapping portion forms an overlapping region 361. In addition, a through hole 104c and a concave portion 104g are provided in the enlarged diameter portion of the outer layer body 104, and a non-adhesive region 361a where the two films are not bonded is overlapped with the through hole 104c or the concave portion 104g in the overlapping region 361. As a result, the shrink film 360 can be provided with the function of an outside air introduction valve, so that the number of parts can be reduced and the film can be manufactured at a low cost. Further, by ensuring the area of the recess 104g to a certain extent, the alignment accuracy of the non-adhesion area 361a with respect to the outer layer body 104 can be relaxed. In the present embodiment, as shown in FIG. 8A, the longitudinal direction of the recess 104g is formed in the vertical direction as the longitudinal direction of the non-adhesion region 361a is in the vertical direction. The alignment accuracy of the region 361a can be moderated appropriately.

  In addition, according to the present embodiment, in the normal shrink film 360 mounting process in which both circumferential ends 360e of the shrink film 360 are brought into contact with each other and connected from the inner periphery side by the connecting film 370, one overlap region 361 is provided. The function of the outside air introduction valve can be provided only by providing the non-adhesion region 361a in the part. Therefore, the change of the manufacturing equipment of the double container 400 can be suppressed as much as possible.

  In the present embodiment, in addition to opening and closing of the air holes between the two films in the non-adhesion region 361a, air leakage is also limited by the gap between the circumferential ends 360e. When pressed, air leakage from the non-contact area 361a can be more reliably suppressed.

  In the present embodiment, the concave portion 104g is configured to have a shape that is long in the vertical direction. However, the present invention is not limited to this configuration, and the concave portion 104g may be configured to be long in the circumferential direction in accordance with the shape of the non-adhesive region 361a. .

  In addition, although it demonstrated that the structural example of the shrink film which covers the cap main body of FIGS. 2-5 was applicable to the double container 100 which concerns on 1st Embodiment, it is not limited to this combination. 2 to 5 can be applied to the double containers 200, 300, 400 according to the second embodiment, the third embodiment, and the fourth embodiment. .

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, functions included in each component can be rearranged so as not to be logically contradictory, and a plurality of components can be combined into one or divided. It should be understood that these are included within the scope of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the double container 100 which has a function of an external air introduction valve with a simple structure.

2 Double container main body 3 Inner layer 3a Upper opening 4 Outer layer 4a Mouth peripheral wall (mouth)
4b Male thread 4c Through hole (outside air introduction hole)
4d Groove 10 Cap body 11 Outer wall 11b Lower end 12 Female thread 18a, 18b Circumferential groove 19 Adhesive fixing area 20 Inner plug 26 Seal wall 50 Lid 51 Hinge 52 Upper wall 53 Lid peripheral wall 58 Gripping part 60 Shrink film 61 Overlapping area 61a Non-adhesion area 61b Adhesion area 63 Cap film 65 Perforation for film removal 67a, 67b, 67c Perforation for stopper 70 Shrink film 73 Cap film 75 Perforation for film removal 77a, 77b Perforation for stopper 80 Shrink film 83 Cap film 85 Perforation for film removal 87a Perforation for stopper 90 Shrink film 93 Cap film 95 Perforation for film removal 97a Perforation for stopper 100 Double container 102 Double Vessel body 104 outer body 104c through holes (air introduction hole)
104g Concave portion 160 Shrink film 161 Overlapping region 161a Non-adhesion region 161b Adhesion region 200 Double container 260 Shrink film 261 Film slit (slit)
270 Valve body film 270a Non-adhesion area 270b Adhesion area 300 Double container 360 Shrink film 360e Circumferential ends 361 Overlap area 361a Non-adhesion area 361b Adhesion area 370 Connection film 400 Double container G Gap S Storage space

Claims (10)

A double container comprising an inner layer containing contents and a squeezable outer layer containing the inner layer,
A cap body having a pouring hole for pouring contents from the inner layer body, and attached to the mouth of the outer layer body;
Located between the pouring hole and the inner layer body and blocking communication between the pouring hole and the inner layer body, while the pouring hole and the inner layer body are increased by a pressure increase in the inner layer body due to squeeze of the outer layer body A check valve for communicating with the inner layer body;
A shrink film that covers at least a part of the outer layer body and the cap body from outside,
The shrink film has an overlapping area where the films are stacked, and the overlapping area can be separated from the bonding area where the stacked films are bonded to each other in the thickness direction without the stacked films being bonded. Non-adhesive area,
Outside air is introduced into the space between the outer layer body and the inner layer body through both the space between the stacked films in the non-adhesion region and the outside air introduction hole provided in the outer layer body. Double container characterized by.   The double container according to claim 1, wherein the outside air introduction hole communicates with the outside only through a space between the stacked films in the non-adhesion region. The overlap region extending in the vertical direction is formed by covering at least a part of the outer layer body and the cap body with the shrink film overlapping in the circumferential direction,
The outside air introduction hole is disposed at the mouth of the outer layer body, and the shrink film covers from the outside so as to bridge the gap between the lower end of the cap body and the outer layer body, and at least a part of the non-adhesion region is The double container of Claim 1 or 2 provided in the area | region which bridges the said clearance gap. The overlap region extending in the vertical direction is formed by covering at least a part of the outer layer body and the cap body with the shrink film overlapping in the circumferential direction,
The outside air introduction hole is disposed in a diameter-enlarged portion or a body portion of the outer layer body, a recess is provided around the outside air introduction hole on the outer peripheral surface of the outer layer body, and at least a part of the non-adhesion region is the outside air region. The double container of Claim 1 or 2 provided in the area | region which overlaps with an introduction hole or the said recessed part. The outside air introduction hole is disposed in a diameter-enlarged portion or a body portion of the outer layer body, and a recess is provided around the outside air introduction hole in the outer peripheral surface of the outer layer body,
A valve body film is disposed between the shrink film and the outer layer body, and an overlapping portion of the shrink film and the valve body film forms the overlapping region,
At least a part of the non-adhesion region is provided in a region overlapping the outside air introduction hole or the recess,
The double container according to claim 1, wherein a slit is provided in the shrink film in the non-adhesion region. The outside air introduction hole is disposed in a diameter-enlarged portion or a body portion of the outer layer body, and a recess is provided around the outside air introduction hole in the outer peripheral surface of the outer layer body,
And further comprising a connecting film for connecting both ends in the circumferential direction of the shrink film covering at least a part of the outer layer body and the cap body from the circumferential direction from the inner circumferential side,
The overlapping portion of the shrink film and the connecting film forms the overlapping region,
The double container according to claim 1 or 2, wherein at least a part of the non-adhesion region is provided in a region overlapping with the outside air introduction hole or the recess.   The shrink film has a film removal perforation extending downward from the upper end and a plurality of stopper perforations arranged in the vertical direction and extending in the circumferential direction, and the film removal perforation is formed at the lower end. Only the uppermost perforation for stopper is connected to the uppermost perforation for stopper, and the plurality of perforations for stopper are arranged above the non-bonding region. Double container according to item.   The outer peripheral wall of the cap body is provided with a circumferential groove extending in the circumferential direction, and the shrink film has a film removal perforation extending downward from the upper end and a stopper perforation extending in the circumferential direction. The film removal perforation is connected to the stopper perforation at the lower end, and the stopper perforation is disposed in a region overlapping the circumferential groove and disposed above the non-bonding region. The double container according to any one of claims 1 to 6.   The shrink film has a perforation for film removal that extends downward from the upper end, a perforation for a stopper that extends in the circumferential direction, and is disposed adjacent to the lower side of the perforation for the stopper, and is used for adhesively fixing to the cap body. 2. The film fixing perforation is connected to the stopper perforation at a lower end, and the stopper perforation is disposed above the non-adhesion region. The double container as described in any one of thru | or 6.   The double container according to any one of claims 7 to 9, wherein the film-removing perforation extends spirally downward from an upper end.

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