JP2018002239A - 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 of an outer layer body 4; a check valve which blocks communication of the pour-out port with an 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 the 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 outer layer body 4 has an outside air introduction hole 4c through which an outer peripheral surface of the outer layer body 4 is communicated with a space between the outer layer body 4 and the inner layer body 3. Along the outer peripheral surface of the cap main body 10 is provided an outside air introduction groove 14. The outside air introduction groove 14 is communicated with the outside air introduction hole 4a, and a part of the groove is covered with the shrink film 60 to form an outside air introduction path, and extends beyond an end part of the shrink film 60 to be opened to the outside, so that outside air is introduced through both of the outside air introduction groove 14 and the outside air introduction hole 4a into the space between the outer layer body 4 and the inner layer body 3.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 outer layer body has an outside air introduction hole that communicates an outer peripheral surface of the outer layer body and a space between the outer layer body and the inner layer body,
An outside air introduction groove is provided along the outer peripheral surface of the outer layer body or the cap body, and the outside air introduction groove communicates with the outside air introduction hole and a part thereof is covered with the shrink film to form an outside air introduction path. Extending beyond the end of the shrink film and open to the outside,
The double container is characterized in that outside air is introduced into a space between the outer layer body and the inner layer body through both the outside air introduction groove and the outside air introduction hole.

  Further, it is preferable that the outside air introduction hole communicates with the outside only through the outside air introduction groove.

  Further, 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 portion of the cap body and the outer layer body, and the outside air introduction groove is It is preferable that the lower end extends upward along the outer peripheral surface of the cap body and extends beyond the upper end of the shrink film when the double container is used.

  Further, the outside air introduction hole is disposed in a diameter-enlarged portion or a body portion of the outer layer body, and the outside air introduction groove extends downward from the outside air introduction hole along the outer layer body, and is an end portion below the shrink film. Preferably extending beyond.

  Preferably, the shrink film covers the entire body portion and the outer periphery of the bottom portion of the outer layer body, and the outside air introduction groove extends beyond the end portion of the shrink film at the bottom portion of the outer layer body. .

  Further, before the use of the double container, the shrink film has a perforation for film removal extending downward from the upper end and a plurality of perforations for stopper extending in the circumferential direction in the vertical direction, It is preferable that the film removal perforation is connected at the lower end only to the uppermost stopper perforation among the plurality of stopper perforations.

  The outer peripheral wall of the cap body is provided with a circumferential groove extending in the circumferential direction, and before the use of the double container, the shrink film has a film removal perforation extending downward from the upper end, A perforation for a stopper extending in a direction, and the perforation for film removal is connected to the perforation for a stopper at a lower end, and the perforation for the stopper is disposed in a region overlapping with the circumferential groove. Is preferred.

  In addition, before the use of the double container, the shrink film is adjacent to the film perforation extending downward from the upper end, the perforation for stopper extending in the circumferential direction, and the lower part of the perforation for stopper. Preferably, the film removing perforation is connected to the stopper perforation at a lower end.

  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 which follows the arrow A of (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. It is a front view which shows the double container which concerns on 2nd Embodiment of this invention.

  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 slight 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 outside air into the space between the outer layer body 4 and the inner layer body 3 from the through hole 4 c via the outside air introduction groove 14 formed in the outer peripheral wall 11 and the gap G. Can be introduced. In this embodiment, the outer peripheral wall 11 is configured to cover the entire outer peripheral side of the mouth peripheral wall 4a. However, the present invention is not limited to this aspect, and the outer peripheral wall 11 covers only a part of the mouth peripheral wall 4a. You may comprise so that it may cover.

  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 squeezing of the outer layer body 4 is released, the valve body is again seated on 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 this embodiment shown in FIG. 1A, 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. FIG. 1A shows a state in which the user can remove the shrink film 60 covering the upper portion of the cap body 10 and the lid body 50 to allow the contents to be poured out. 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. 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 outside air introduction groove 14 formed in the outer peripheral wall 11. The outside air introduction groove 14 extends upward from the lower end portion 11 b of the outer peripheral wall 11 along the outer peripheral surface. As shown in FIGS. 1A and 1B, the outside air introduction groove 14 is covered from the outside by the shrink film 60 except for the upper end portion, thereby forming an outside air introduction path. The outside air introduction groove 14 extends beyond the upper end portion of the shrink film 60 in use (the state shown in FIG. 1A) and communicates with the outside. In addition, the outside air introduction groove 14 has a minute cross section that only discharges the air in the space between the outer layer body 4 and the inner layer body 3 to the outside even when the body portion of the double container body 2 is pressed. It is a groove. When only one outside air introduction groove 14 is provided on the circumference, the cross section of the outside air introduction groove 14 is desirably a groove having a width of, for example, less than about 1.5 millimeters, and preferably less than 1.0 millimeter. Is good. If the cross section of the outside air introduction groove 14 is too large, a large amount of air between the outer layer body 4 and the inner layer body 3 is discharged from the outside air introduction groove 14 to the outside even if the body portion of the outer layer body 4 is pressed down. Pressurization to S will be inhibited. Note that an arbitrary number of outside air introduction grooves 14 can be provided according to the size of the grooves. Further, when a plurality of outside air introduction grooves 14 are provided, they can be provided at regular intervals on the circumference, for example. However, it is not limited to these aspects.

  The shrink film 60 covers the entire cap body 10 and a part of the lid 50 in an initial state before use (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 a part of the lid 50 and the cap body 10 is exposed (at this time, the upper end of the outside air introduction groove 14 is also exposed to the outside), the lid 50 is opened and the contents can be discharged from the dispensing hole. It becomes.

  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 of FIG. 1A, and the double container body 2 is changed from the standing posture to the tilted posture. The posture is changed and the body part of the outer layer body 4 is pressed (squeezed). 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, since the cross section of the outside air introduction groove 14 is a minute groove, when the body portion of the outer layer body 4 is being pressed, the outside air introduction groove 14 is removed from the outside air introduction groove 14 via the through hole 4c and the gap G. Only a small amount of air is discharged to the outside. Therefore, even if the outer layer body 4 is pressed, the air between the inner layer body 3 and the outer layer body 4 leaks from the outside air introduction groove 14, so that the pressurization to the accommodation space S is hindered. There is no. 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, the inside of the through hole 4c and the gap G also becomes negative pressure. By this negative pressure, outside air is gradually introduced through the outside air introduction groove 14. 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.

  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 upper end portion of the outside air introduction groove 14 (see FIG. 1A) extends slightly upward from the stopper perforations 67a disposed at the uppermost position among the stopper perforations 67a to 67c.

  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 (at this time, the upper end of the outside air introduction groove 14 is also exposed to the outside). 50 can be opened and the contents can be discharged 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, it does not accidentally remove the lower end portion 11b of the cap body 10 and impair the function of the outside air introduction valve.

  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 has an inclination with respect to the vertical direction, if the lower end of the film removal perforation 65 is connected to the stopper perforation 67a, the lower end 11b of the cap body 10 is affected. This is because the cap film 63 portion can be similarly removed.

  In the present embodiment, the stopper perforations 67a to 67c are configured to extend in the horizontal direction and the circumferential direction. However, the present invention is not limited to this mode. 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 upper end portion of the outside air introduction groove 14 (see FIG. 1A) is slightly smaller than the stopper perforations 77a disposed above the stopper perforations 77a and 77b. It extends up.

  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 (at this time, the upper end of the outside air introduction groove 14 is also exposed to the outside). 50 can be opened and the contents can be discharged 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, it does not mistakenly remove the lower end portion 11b of the cap body 10 to impair the function of the outside air introduction valve.

  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. Also in the example of FIG. 4, the upper end portion of the outside air introduction groove 14 extends slightly above the stopper perforation 87a.

  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 (at this time, the upper end of the outside air introduction groove 14 is also exposed to the outside). 50 can be opened and the contents can be discharged 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, it does not mistakenly remove the lower end portion 11b of the cap body 10 to impair the function of the outside air introduction valve.

  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 lower end portion 11b of the cap body 10 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, compared to FIG. 2, an adhesive 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 removal perforation 95 is connected to the stopper perforation 97a, and an adhesive 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 bonded and fixed in the bonding region 19. In the example of FIG. 5 as well, the upper end portion of the outside air introduction groove 14 extends slightly above the stopper perforation 97a. In addition, it is desirable not to apply an adhesive around the outside air introduction groove 14 in the bonding region 19 in order to ensure a flow path of the outside air.

  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 (at this time, the upper end of the outside air introduction groove 14 is also exposed to the outside). 50 can be opened and the contents can be discharged 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 when the user pulls the shrink film 90 downward along the film removal perforations 95 and cuts the shrink film 90 vigorously, the adhesive region 19 is located below the stopper perforations 97a. Therefore, the crack does not run through the bonding 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, it does not accidentally remove the lower end portion 11b of the cap body 10 to impair the function of the outside air introduction valve.

  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) is provided, and an outside air introduction groove 14 is provided along the outer peripheral wall 11 of the cap body 10 so as to communicate with the through hole 4c. The outside air introduction groove 14 further extends from the end of the shrink film 60 that covers the outer layer body 4. It was configured to extend and communicate with the outside. As a result, outside air is introduced into the space between the outer layer body 4 and the inner layer body 3 via both the outside air introduction groove 14 and the through-hole 4c, so that a member having a function of an outside air introduction valve needs to be newly incorporated. Since the cap body 10 and the shrink film 60 can have the function of an outside air introduction valve, the number of components can be reduced and the manufacturing can be performed at a low cost.

  In addition, according to the present embodiment, the through hole 4c is configured to communicate with the outside only through the outside air introduction groove 14, so that the air between the inner layer body 3 and the outer layer body 4 is pressed when the body portion is pressed. Since leakage can be suppressed as much as possible, it is possible to efficiently pressurize the accommodation space S and discharge the contents.

  Moreover, according to this embodiment, while providing the through-hole 4c in the opening | mouth part peripheral wall 4a, it comprises so that the shrink film 60 may bridge | cross the clearance gap G between the lower end part 11b of the cap main body 10, and the outer-layer body 4, and external air introduction The groove 14 extends upward from the lower end portion 11 b of the outer peripheral wall 11 along the outer peripheral surface, and extends beyond the upper end portion of the shrink film 60 when the double container 100 is used. 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.

  Moreover, in this embodiment, it is only necessary to provide the outside air introduction groove 14 in the outer layer body 4, and the shrink film 60 can be the same as a normal double container. The function of the outside air introduction valve can be provided without changing.

  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 upper end portion of the outside air introduction groove 14 extends upward from the stopper perforation 67a. 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. Therefore, 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 is impaired by removing it to the lower end portion 11b of the cap body 10 by mistake. There is nothing.

  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; The upper end portion of the outside air introduction groove 14 is configured to extend upward from the stopper perforation 87a. 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 mistakenly removing the lower end portion 11b of the cap body 10.

  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 removal perforation 95 is connected to the stopper perforation 97a at the lower end, and the upper end of the outside air introduction groove 14 is the stopper perforation. It was comprised so that it might extend above the eyes 97a. Thus, even when the user pulls the shrink film 90 down vigorously along the film removal perforation 95 and cuts it, the adhesive region 19 is provided below the stopper perforation 97a. For this reason, the crack does not run through the bonding region 19 further downward. Therefore, the cap film 93 can be removed along the film removal perforations 95 and the stopper perforations 97a. Therefore, the function of the outside air introduction valve is not impaired by mistakenly removing the lower end portion 11b of the cap body 10.

  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. Therefore, the cap film 73 can be removed along the film removing perforation 75 and the stopper perforation 77a, and the function of the outside air introduction valve can be impaired by removing it to the lower end portion 11b of the cap body 10 by mistake. Absent.

  Next, the double container 200 which is 2nd Embodiment of this invention is demonstrated concretely with reference to FIG. The double container 200 according to the second embodiment is provided with a through hole 104c and an outside air introduction groove 104g in the enlarged diameter portion instead of being provided in the peripheral wall of the mouth of the double container main body 2 as compared with the first embodiment. Other than this, the configuration is similar to that of the first embodiment. Therefore, here, detailed description will be made focusing on differences from the first embodiment.

  FIG. 6 is a front view showing a double container 200 according to the second 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. Further, as shown in FIG. 6, an outer air introduction groove 104g extending downward from the through hole 104c is provided on the outer peripheral surface of the outer layer body 104. Further, the shrink film 60 is tightly fixed to the outer peripheral surface of the outer layer body 104 by heat shrinkage. The shrink film 60 covers a part of the cap body 10 as well as a diameter-enlarged portion, a trunk portion, and a portion of the bottom portion (outer peripheral portion) of the outer layer body 104. And the edge part of the external air introduction groove | channel 104g extended below is extended from the trunk | drum of the outer layer body 104 to the bottom part, extends beyond the edge part of the shrink film 60 in a bottom part, and is connected to the exterior. That is, the outside air introduction groove 104g is covered from the outside by the shrink film 60 except for the lower end portion, thereby forming an outside air introduction path. The through hole 104c communicates with the outside only through the outside air introduction groove 104g. The cross section of the outside air introduction groove 104g is a minute groove that only discharges the air in the space between the outer layer body 104 and the inner layer body 3 to the outside even when the body portion of the outer layer body 104 is pressed. .

  When discharging the contents from the double container 200 configured as described above, the user opens the lid 50 from the state of FIG. 6 and changes the posture of the double container main body 102 from the standing posture to the tilting posture. The body part of the outer layer body 104 is pressed (squeezed). 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, since the cross-section of the outside air introduction groove 104g is a minute groove, when the body portion of the outer layer body 104 is pressed, a slight amount from the outside air introduction groove 104g passes through the through hole 104c. Only air is discharged. Therefore, even if the outer layer body 104 is pressed, the air between the inner layer body 3 and the outer layer body 104 leaks less from the outside air introduction groove 104g, and thus the pressurization to the accommodation space S is hindered. There is no. 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, negative pressure is also generated in the through hole 104c and the outside air introduction groove 104g. This negative pressure gradually introduces outside air through the outside air introduction groove 104g. 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 is provided in the enlarged diameter portion of the outer layer body 104. However, the present invention is not limited to this mode, and an arbitrary region covered with the shrink film 60 such as being provided in the body portion of the outer layer body 104. Can be provided.

  In the present embodiment, the outside air introduction groove 104g extending downward is configured to communicate with the outside at the bottom, but is not limited to this mode. For example, the lower end portion of the shrink film 60 may be disposed in the trunk portion, and the outside air introduction groove 104g may communicate with the outside in the trunk portion. Further, the outside air introduction groove 14 may extend upward from the through hole 104 c and communicate with the outside at the upper end portion of the shrink film 60.

  As described above, according to the double container 200 of the present embodiment, the through hole 104c communicating with the inner layer body 3 is provided in the enlarged diameter portion of the outer layer body 104, and the outside air introduction groove 104g having a minute cross section is formed in the through hole 104c. The bottom of the shrink film 60 that covers the outer layer body 104 extends downward from the bottom to the bottom, and communicates with the outside air. Accordingly, it is not necessary to newly incorporate a member having the function of the outside air introduction valve, and the outside air introduction groove 104g and the shrink film 60 can have the function of the outside air introduction valve. be able to.

  In addition, according to the present embodiment, it is only necessary to provide the outside air introduction groove 104g in the outer layer body 104, and the shrink film 60 can be the same as an ordinary double container. The function of the outside air introduction valve can be provided without changing the process.

  In addition, according to the present embodiment, the function of the outside air introduction valve is realized by the through hole 104c, the outside air introduction groove 104g, and the shrink film 60 provided in the enlarged diameter portion of the outer layer body 104. Therefore, the shrink film is used before use. Even when 60 is vigorously cut from the upper end, the function of the outside air introduction valve is not impaired by removing the shrink film 60 around the through hole 104c and the outside air introduction groove 104g.

  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. The structural example of the shrink film which covers the cap main body described in FIGS. 2 to 5 can also be applied to the double container 200 according to the second embodiment. In this case, if the perforation for the stopper is provided at a position covering the outer peripheral wall of the cap body, the shrink film around the through hole and the outside air introduction groove can be removed even when the shrink film is cut downward from the upper end during use. Never removed. Therefore, the function of the outside air introduction valve is not impaired.

  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 portion 10 cap body 11 outer peripheral wall 11b lower end portion 12 female screw portion 14 outside air introduction groove 18a, 18b peripheral groove 19 adhesion region 20 inner plug 26 seal wall 50 lid body 51 hinge 52 upper wall 53 lid body peripheral wall 58 gripping portion 60 shrink film 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 container body 104 Outer layer body 104c Through hole Outside air introduction hole)
104 g Outside air introduction groove 200 Double container G Gap S Storage space

Claims (9)

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 outer layer body has an outside air introduction hole that communicates an outer peripheral surface of the outer layer body and a space between the outer layer body and the inner layer body,
An outside air introduction groove is provided along the outer peripheral surface of the outer layer body or the cap body, and the outside air introduction groove communicates with the outside air introduction hole and a part thereof is covered with the shrink film to form an outside air introduction path. Extending beyond the end of the shrink film and open to the outside,
A double container, wherein outside air is introduced into a space between the outer layer body and the inner layer body through both the outside air introduction groove and the outside air introduction hole.   The double container according to claim 1, wherein the outside air introduction hole communicates with the outside only through the outside air introduction groove.   The outside air introduction hole is disposed at a mouth portion of the outer layer body, the shrink film covers from the outside so as to bridge a gap between a lower end portion of the cap body and the outer layer body, and the outside air introduction groove is formed at the lower end. 3. The double container according to claim 1, wherein the double container extends upward along the outer peripheral surface of the cap body from a portion and extends beyond the upper end of the shrink film when the double container is used.   The outside air introduction hole is disposed in a diameter-enlarged portion or a body portion of the outer layer body, and the outside air introduction groove extends downward from the outside air introduction hole along the outer layer body and exceeds an end portion below the shrink film. The double container according to claim 1 or 2, wherein the double container extends.   The shrink film covers the entire body portion and the outer periphery of the bottom portion of the outer layer body, and the outside air introduction groove extends beyond the end portion of the shrink film at the bottom portion of the outer layer body. Double container as described.   Before the use of the double container, the shrink film has a perforation for film removal extending downward from the upper end and a plurality of perforations for stopper extending in the circumferential direction in the vertical direction, and removing the film The double container according to any one of claims 1 to 5, wherein the perforation is connected to only the uppermost stopper perforation among the plurality of stopper perforations at the lower end.   The outer peripheral wall of the cap body is provided with a circumferential groove extending in the circumferential direction, and before the use of the double container, the shrink film has a perforation for film removal extending downward from the upper end in the circumferential direction. A perforation for stopper extending, and the perforation for film removal is connected to the perforation for stopper at a lower end, and the perforation for stopper is disposed in a region overlapping with the circumferential groove. The double container according to any one of 1 to 5.   Before the use of the double container, the shrink film is disposed adjacent to a film removing perforation extending downward from the upper end, a stopper perforation extending in a circumferential direction, and a lower portion of the stopper perforation. 6. The film according to claim 1, further comprising a bonding region for bonding and fixing to the cap body, wherein the perforation for film removal is connected to the perforation for a stopper at a lower end. Double container.   The double container according to any one of claims 6 to 8, wherein the film-removing perforation extends spirally downward from an upper end.

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