JP2017214102A - Cap for double container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cap for a double container which can suppress outside air intruding into a storage space S even if storing contents containing a few solid matters.SOLUTION: A cap 1 for a double container comprises: a cap main body 10 having a pour-out hole 14a; a first check valve 31 which is provided between an inner layer body 3 and the pour-out hole 14a, and put into an open state by rise in pressure in the inner layer body 3 caused by squeezing an outer layer body 4; and a second check valve 43 which is provided between the first check valve 31 and the pour-out hole 14a, and put into an open state by rise in pressure in the inner layer body 3. The first check valve 31 has a slit valve 31a, and the second check valve 43 has a check valve body 43a whose outer periphery side end part is supported by an elastic arm 43b, and a valve seat 33 on which the check valve body 43a is seated. The valve seat 33 and the slit valve 31a are integrally molded, and between the first check valve 31 and the second check valve 43, a content storage space L is provided in which some of residual contents are stored.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a double container cap that is attached to the mouth of a double container to pour out contents, and is particularly suitable for pouring out contents containing solid matter.

  2. Description of the Related Art Conventionally, contents that are contained in a container body by pressing (squeezing) the body part of the container body, having a configuration in which a discharge cap having a discharge port is attached to the mouth part of the container body that contains the contents 2. Description of the Related Art Discharge containers are known in which a desired amount can be discharged from a discharge port.

  Further, as such a discharge container, there is a structure provided with a check valve that allows the discharge of the contents from the container body through the discharge port while preventing the contents and the outside air from flowing into the container body. Are known.

  For example, in Patent Document 1, the container body is configured as a double container containing an inner layer body that can be deformed and reduced inside the outer layer body, and between the discharge cap (cap body) and the inner stopper (supporting inner stopper). Describes a discharge container having a structure in which a check valve (discharge valve) having a slit valve structure is provided.

  In the discharge container having such a configuration, after the body part is pressed by pressing the body part and the contents are discharged, when the body part is released from the pressure, the contents and the outside air directed from the discharge port to the container body by the check valve are released. Inflow of air is prevented, and outside air is introduced between the outer layer body and the inner layer body through the intake hole provided in the discharge cap, and the outer layer body is restored to its original shape while the inner layer body is deformed and deformed. As a result, the contents can be discharged without being replaced with the outside air, thereby making it difficult for the contents remaining inside the container main body to come into contact with the air and suppressing deterioration and alteration.

JP 2013-95455 A

  By the way, the discharge container as described above is often used for the purpose of containing liquid contents such as soy sauce and cosmetics, for example, contents containing some solid matter such as sauce and miso, There is also a desire to use it for the purpose of storing the contents with ingredients.

  However, since the conventional discharge container constitutes a check valve with a single slit valve structure, when the contents are discharged, solids contained in the contents are caught in the slits constituting the slit valve. The slit valve may not close. If the slit remains open after ejection in this manner, the outside air may enter the content storage space and lead to deterioration or alteration of the content.

  An object of the present invention is to solve such a problem, and its purpose is to suppress the intrusion of outside air into the accommodation space even when contents containing some solid matter are accommodated. An object of the present invention is to provide a cap for a double container.

The present invention is a double container cap mounted on a double container body comprising an inner layer body for containing contents and a squeezable outer layer body for containing the inner layer body,
A cap body having a pouring hole for pouring the contents from the inner layer body and attached to the mouth of the double container body;
Provided in the flow path between the inner layer body and the extraction hole, and shuts off the outflow of contents from the inner layer body in a closed state, while being opened by the pressure increase in the inner layer body due to the squeeze of the outer layer body A first check valve that allows the contents from the inner layer to pass through;
An increase in pressure in the inner layer due to squeezing of the outer layer body is provided in a flow path between the first check valve and the outlet hole and blocks outflow of contents from the inner layer body in a closed state. And a second check valve that opens with the first check valve to allow the contents from the inner layer body to pass through,
The first check valve has a slit valve,
The second check valve has a check valve body whose outer end is supported by an elastic arm, and a valve seat on which the check valve body is seated when the second check valve is closed. And
The valve seat and the slit valve are integrally molded,
A double content storage space is provided between the first check valve and the second check valve, in which a part of the remaining content is stored after the content is discharged. It is a cap for containers.

  Moreover, it is preferable that the said slit valve has a dome shape which protrudes upwards, and the outer peripheral end of this slit valve is supported by the valve fixing | fixed part which regulates the displacement to a downward and outer peripheral direction.

In addition, it further has an inner plug sandwiched between the cap body and the upper end of the mouth,
The valve fixing part is preferably formed integrally with the inner plug.

In addition, the cap body is provided with an outside air introduction hole for introducing outside air into a space between the outer layer body and the inner layer body in association with restoration by squeezing the outer layer body.
It is preferable to further include an outside air introduction valve that communicates with the outside air introduction hole and is opened when the outer layer body is restored by releasing the squeeze.

  Further, an annular wall surrounding a flow path of contents from the inner layer body to the dispensing hole is further provided, and the second check valve is provided integrally on an inner peripheral surface of the annular wall, and the outside air introduction valve Is preferably provided integrally with the outer peripheral surface of the annular wall.

  According to the double container cap of the present invention, it is possible to suppress the intrusion of outside air into the accommodation space even when the contents containing some solid matter are accommodated.

It is a partial cross section figure which shows the whole container of the state which mounted | wore the double container main body with the cap for double containers which concerns on 1st Embodiment of this invention. It is sectional drawing of the cap for double containers which concerns on 1st Embodiment of this invention. It is a bottom view which shows the 1st non-return valve (slit valve) and valve fixing part which comprise the cap for double containers which concerns on 1st Embodiment of this invention. It is a top view which shows the 2nd check valve (three-point valve) which comprises the cap for double containers which concerns on 1st Embodiment of this invention. It is a half section showing the composition of (a) a lid which constitutes the double container cap concerning a 1st embodiment of the present invention, and (b) a cap main part (all after opening a lid). In the double container cap which concerns on 1st Embodiment of this invention, after discharging a content, it is sectional drawing which shows the state by which the content is stored in the content storage space. It is sectional drawing of the cap for double containers which concerns on 2nd Embodiment of this invention.

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

  FIG. 1 shows a state in which a double container cap 1 according to a first embodiment of the present invention is mounted on a double container main body 2 adapted to the cap. The double container cap 1 includes a cap body 10, an inner stopper 20, a check valve assembly 30, a coupling valve 40, and a lid 50. 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 (upper side in FIG. 1), and the side on which the double container body 2 is located is the lower side (FIG. 1). Lower side).

  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. 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 for accommodating contents and an upper opening 3a (see FIG. 2) connected to the accommodation space S.

  The outer layer body 4 is formed by connecting a cylindrical mouth portion peripheral wall 4a to a body portion 6 having reversible flexibility and a bottom portion 8 for closing the lower end of the body portion 6. 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 main body 10 which comprises the double container cap 1 is demonstrated using FIG. The cap body 10 includes an outer peripheral wall 11 that surrounds the mouth peripheral wall 4 a, and an internal thread portion 12 a corresponding to the male thread portion 4 b of the mouth peripheral wall 4 a is formed on the inner peripheral surface of the outer peripheral wall 11. In addition, a three-thread male screw portion 12b for screw-engaging with a lid 50 described later is provided on the upper portion of the outer peripheral wall 11. A top wall 13 is integrally connected to the upper end of the outer peripheral wall 11. Further, a pouring cylinder 14 is provided at the center of the top surface of the top wall 13, and an pouring hole 14 a for pouring contents is formed on the inner peripheral surface of the pouring cylinder 14. In the present embodiment, the top wall 13 is provided with two top wall step portions 13a and 13b so that the height decreases toward the outer peripheral direction. In addition, a pair of upper fitting walls 15 having a concentric double arrangement is provided on the lower surface of the top wall 13. Further, an outside air introduction hole 16 penetrating the top wall 13 is provided on the outer side in the radial direction from the upper fitting wall 15. In the present embodiment, the outside air introduction hole 16 is provided so as to open outward in the radial direction in the top wall step portion 13b. By configuring in this way, the contents overflowing on the top wall 13 become difficult to enter the outside air introduction hole 16. Note that the lower end of the outer peripheral wall 11 is in airtight contact with the mouth peripheral wall 4a, and an air passage T leading to the through hole 4c is provided between the mouth peripheral wall 4a and the outer peripheral wall 11.

  In addition, in this embodiment, although it has comprised so that the groove part 4d which notches the male screw part 4b to an up-down direction may be used as the ventilation path T, it is not limited to this aspect. The gap between the male screw portion 4b and the female screw portion 12a may be used as the air passage T without providing the groove portion 4d.

  In the present embodiment, the outside air introduction hole 16 is provided in the top wall 13 of the cap body 10 and the through hole 4 c is provided in the mouth peripheral wall 4 a so as to introduce the outside air into the space between the outer layer body 4 and the inner layer body 3. However, the present invention is not limited to this mode. For example, outside air may be introduced into the space between the outer layer body 4 and the inner layer body 3 through a slit in the pinch-off portion of the bottom 8 of the double container body 2.

  On the inner peripheral side of the dispensing cylinder 14, a dispensing plug 19 that closes the dispensing hole 14 a when the double container cap 1 is not used is provided. The spout 19 has a recess 19e at the center of the upper surface, and a fitting column 55 hanging from a lid 50, which will be described later, strongly undercuts the protrusion 19a at the upper end of the recess 19e. The plug 19 is configured to be difficult to pull downward with respect to the lid 50. Moreover, the outer peripheral rib 19b is provided in the outer peripheral surface of the extraction | pouring stopper 19, and it penetrates between the ribs 54a intermittently provided in the circumferential direction on the inner peripheral surface of the inner seal cylinder 54b of the lid 50 which will be described later. Thereby, the displacement in the circumferential direction of the pouring stopper 19 is restricted. In the unused state, the spout 19 is integrally connected to the spout cylinder 14 via the fracture portion 19d at the lower end of the outer peripheral surface.

  An inner plug 20 is provided inside the cap body 10. The inner plug 20 includes a partition wall 21 that is located between the pouring hole 14 a and the inner layer body 3 and covers the upper opening 3 a of the inner layer body 3.

  A fitting wall 25 having a cylindrical shape is provided on the upper surface of the partition wall 21. On the inner peripheral surface of the fitting wall 25, an annular wall 41 of the coupling valve 40 described later is configured to be fitted. On the other hand, a valve fixing portion 23 composed of an outer wall 23e, a horizontal wall 23d, an inner wall 23c, and a bottom wall 23b is provided immediately below the fitting wall 25 on the lower surface of the partition wall 21. A check valve assembly 30 in which a later-described first check valve 31 and a valve seat 33 are integrally formed is disposed in an area defined by the valve fixing portion 23. In addition, an annular seal wall 26 is provided on the outer peripheral side of the outer wall 23 e so as to sandwich the inner layer body 3 with the outer layer body 4. As shown in FIG. 2, at least one groove 27 is provided on the outer edge of the partition wall 21.

  In the first check valve 31, a slit valve 31a having a cross-shaped slit at the center and having a convex dome shape is connected to a cylindrical slit base 31c via a side wall 31b extending upward. . The first check valve 31 is fixed to the valve fixing portion 23 by the lower end of the annular wall 41 pressing the slit base 31 c against the horizontal wall 23 d of the valve fixing portion 23. At this time, the bottom wall 23b and the inner wall 23c of the valve fixing portion 23 come into contact with the outer peripheral end of the slit valve 31a to restrict the displacement in the downward and outer peripheral directions.

  The bottom wall 23b of the valve fixing portion 23 is provided with a pressing portion 23a that protrudes upward via an arm 23f shown in FIG. The pressing part 23a is provided to press the slit valve 31a from below to slightly open the slit. As a result, the slit of the slit valve 31a does not stick and cannot be opened.

  At the inner peripheral end of the upper surface of the slit base 31c, a valve seat 33 that extends while slightly reducing the diameter upward is provided. The second check valve 43, which will be described later, is closed when a check valve body 43a elastically supported by the check valve arm 43b is seated on the upper surface of the valve seat 33. And the inner peripheral surface of the valve seat 33 comprises the communication port 33a which connects the inside of the inner layer body 3, and the extraction hole 14a.

  A second check valve 43 is provided between the dispensing hole 14 a and the first check valve 31. As shown in FIG. 2, the second check valve 43 is provided on the radially inner side of the cylindrical annular wall 41 as a part of the coupling valve 40. As shown in FIG. 4, the second check valve 43 is a so-called three-point valve having a structure in which three outer peripheral edges of a disc-like check valve valve body 43a are supported by a check valve arm 43b. is there. And when the check valve body 43a contacts the upper end of the valve seat 33, the second check valve 43 is closed. As shown in FIGS. 2 and 4, a protrusion 43d that restricts the upward displacement of the check valve valve body 43a is provided on the upper surface of the check valve valve body 43a.

  When the pressure in the inner layer body 3 is increased by the squeeze of the outer layer body 4, first, the slit valve 31a of the first check valve 31 is elastically deformed upward to open the slit, and the first check valve 31 and the second check valve are opened. The pressure in the content storage space L between the valve 43 increases. Due to the pressure, the check valve valve body 43a is lifted upward in FIG. 2 against the elastic force of the check valve arm 43b, and the second check valve 43 is opened by being separated from the valve seat 33. (The state in which the check valve body 43a is displaced upward is indicated by a two-dot chain line in FIG. 2). When the squeeze of the outer layer body 4 is released, the slit valve 31a is closed, and no pressure is applied to the check valve valve body 43a. Therefore, the check valve valve body 43a has its own weight and the elasticity of the check valve arm 43b. Due to the force, the valve seat 33 is contacted again, and the second check valve 43 is closed.

  The content storage space L shown in FIG. 2 provided between the first check valve 31 and the second check valve 43 serves as a flow path for the content when the content is discharged. A part of the content remaining after the discharge of the gas is stored in the content storage space L so that the slit valve 31a of the first check valve 31 is covered and sealed. That is, a so-called liquid seal can be configured by the contents stored in the content storage space L, and the entry of outside air into the inner layer body 3 can be suppressed.

  The first check valve 31 can be made of a soft material such as silicon rubber or elastomer. The second check valve 43 can be made of a resin material such as low density polyethylene (LDPE).

  In the present embodiment, the slit valve 31a has a dome shape having a convex shape on the upper side, but is not limited to this aspect. For example, the slit valve 31a may have a convex shape on the lower side or a flat surface. It is good also as a shape. In addition, the slit formed in the slit valve 31a may have, for example, a curved shape other than a cross shape, and the number of slits may be one, or three or more.

  In the present embodiment, the check valve body 43a constituting the second check valve 43 is formed of a disk-shaped member, but is not limited to this aspect, and is a member having a rectangular shape or the like. Also good. Further, the second check valve 43 is not necessarily a three-point valve, and a valve body such as a one-point valve, a two-point valve, or a four-point valve is supported by an elastic arm, and is opened by a positive pressure in the inner layer body 3. Various valves can be used.

  On the other hand, an outside air introduction valve 45 is provided outside the annular wall 41 in the radial direction, as shown in FIG. The outside air introduction valve 45 is formed on the radially outer side of the annular wall 41 to form an annular and thin valve body 45a. The valve body 45 a closes the outside air introduction hole 16 by connecting the inner peripheral end to the outer peripheral surface of the annular wall 41 and seating the outer peripheral end on the lower surface of the top wall 13 of the cap body 10. As can be seen from FIG. 2, the annular valve body 45 a is formed in a curved shape that protrudes toward the inner layer body 3 side. By adopting this curved shape, the valve body 45a can reliably maintain the outside air introduction valve 45 in a closed state until a predetermined negative pressure is applied.

  In the present embodiment, the second check valve 43 and the outside air introduction valve 45 are configured to be provided integrally with the annular wall 41. However, the present invention is not limited to this aspect. For example, the second check valve 43 may be provided on the first annular wall, and the outside air introduction valve 45 may be provided on the second annular wall, and the two may be configured separately. Further, the second check valve 43 and the outside air introduction valve 45 may be fixed to other than the annular wall 41.

  In the present embodiment, as shown in FIG. 2, when the second check valve 43 is attached to the cap body 10 and the inner plug 20, the lower portion of the annular wall 41 is fitted and held on the inner peripheral surface of the fitting wall 25. The upper part of the annular wall 41 is fitted and held by the pair of upper fitting walls 15. As a result, as shown in FIG. 2, an inner space K1 that forms a flow path for the contents by communicating the communication port 33a and the extraction hole 14a is defined and formed on the radially inner side of the annular wall 41. On the radially outer side of the wall 41, an outer space K <b> 2 is formed in which an outside air introduction hole 16 and the groove 27 are communicated to form an air flow path.

  As shown in FIG. 2, the lid body 50 is connected to the outer peripheral wall 11 of the cap body 10, and can cover the extraction hole 14 a and the outside air introduction hole 16. 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. On the inner peripheral surface of the lid peripheral wall 53, there is provided a three-thread female thread portion 53e configured to be screw-engageable with a three-thread male thread portion 12b provided on the upper portion of the outer peripheral wall 11 of the cap body 10. In the center of the lower surface of the upper wall 52, a fitting column 55 that undercuts and engages with a concave portion 19e of the spout 19 provided on the inner peripheral surface of the spout cylinder 14 hangs downward. Further, on the outer peripheral side of the fitting column 55 in the upper wall 52, a cylindrical outer seal cylinder 54 is provided that enters the inside of the extraction cylinder 14 and seals the extraction hole 14a when the lid 50 is closed. ing. Furthermore, a contact wall 56 that contacts the upper surface of the top wall 13 when the lid 50 is attached to the cap body 10 hangs down on the outer peripheral side of the outer seal cylinder 54.

  The lid 50 may be configured to be integrally formed with the cap body 10 via a hinge or the like without providing the three-thread female thread portion 53e, or may be attached to the cap body 10 with an undercut. It may be configured.

  In addition, a fixed band 53a that surrounds the outer peripheral wall 11 of the cap body 10 is connected to the lower end of the cover peripheral wall 53 of the cover 50 via a fracture portion 53d. Ribs 53b are provided intermittently in the circumferential direction on the inner peripheral surface of the fixed band 53a. By entering between the ribs 12d provided intermittently on the outer peripheral surface of the outer peripheral wall 11, the periphery of the fixed band 53a is provided. Directional movement is restricted. Further, a protrusion 53c protruding in the inner circumferential direction is provided at the lower end of the fixed band 53a. When the protrusion 53c engages with the lower end of the rib 12d, the fixed band 53a is displaced upward. Is regulated. Accordingly, the fixed band 53a is positioned in the vertical direction so that the protrusion 53c is positioned between the rib 12d and the stepped portion 11a.

  In discharging the contents from the double container cap 1 configured as described above, the user rotates the lid 50 in the circumferential direction from the state shown in FIG. The screw engagement with 53e is released. As described above, the fixed band 53a is restrained from displacement in the vertical direction and the circumferential direction with respect to the outer peripheral wall 11 by the ribs 53b and the protrusions 53c. On the other hand, as the lid body circumferential wall 53 rotates in the circumferential direction, the screw engagement is released and the lid body peripheral wall 53 moves upward. Thus, the fracture | rupture part 53d is cut | disconnected with the relative movement to the circumferential direction of the cover body surrounding wall 53 with respect to the fixed band 53a, and an upward direction. Similarly, while the extraction tube 14 is integrated and fixed with the outer peripheral wall 11, the extraction plug 19 has an outer peripheral rib 19b and a protrusion 19a, and the upper and lower directions and the periphery of the lid 50. Since the displacement is constrained in the direction, it moves upward while rotating as the lid 50 rotates in the circumferential direction. In this way, the breakage portion 19d is cut along with the relative movement of the pouring stopper 19 relative to the pouring cylinder 14 in the circumferential direction and the upward direction. FIGS. 5A and 5B show the state of the lid body 50 and the cap body 10 after the broken portions 53d and 19d are cut.

  When the lid 50 is opened from the unused state by the above procedure, as shown in FIG. 5 (a), the spout 19 is in the lid 50 side with the fitting column 55 under-cut engaged with the recess 19e. Accompanying. As a result, as shown in FIG. 5B, the spout 19 is removed from the spout hole 14a, and the contents can be discharged.

  After the lid 50 is opened, the posture of the double container main body 2 shown in FIG. 6 is changed from the standing posture to the tilted posture, and the body portion 6 (see FIG. 1) of the outer layer body 4 is pressed (squeezed). Thereby, the inside of the inner layer body 3 is pressurized via the air between the inner layer body 3 and the outer layer body 4. When the body portion 6 of the outer layer body 4 is being pressed, pressure is also applied to the valve body 45a from below through the through hole 4c, the air passage T, and the groove 27, so that the outside air introduction valve 45 is kept closed. Is done. Therefore, even if the outer layer body 4 is pressed, the air between the inner layer body 3 and the outer layer body 4 does not leak out from the outside air introduction hole 16, and pressurization into the inner layer body 3 is not hindered. . And since the positive pressure in the inner layer body 3 deforms the slit valve 31a of the first check valve 31 to open the slit, the gap between the first check valve 31 and the second check valve 43 is The pressure in the content storage space L also increases. The check valve body 43a of the second check valve 43 is lifted from the valve seat 33 by the positive pressure in the content storage space L, and the second check valve 43 is also opened. The content enters the content storage space L through the slit opened by the slit valve 31a, passes through the gap between the check valve valve body 43a and the valve seat 33, and then passes through the inner space K1. It is poured out through the outlet 14a.

  After the required amount of content has been poured out, the user releases the pressure on the body 6 of the outer layer body 4. As a result, the positive pressure in the inner layer body 3 returns to the external pressure, and the pressure in the content storage space L also decreases in conjunction with the pressure drop in the inner layer body 3. As a result, the slit valve 31 a of the first check valve 31 is closed, and the check valve body 43 a of the second check valve 43 is also in contact with the valve seat 33 and closed. Note that the first check valve 31 and the second check valve 43 close at approximately the same time, but it is considered that the closing timing of each valve varies depending on the rigidity of each valve body. When the first check valve 31 and the second check valve 43 are closed, as shown in FIG. 6, a part of the content remaining without being discharged is stored in the content storage space L, so that the liquid A seal is constructed. That is, even if the solid matter contained in the content is sandwiched between the check valve valve body 43a and the valve seat 33 and the second check valve 43 is not completely closed, the content storage space L The contents stored inside serve as a sealing material and cover the slit valve 31 a of the first check valve 31. For this reason, the outside air from the extraction hole 14 a does not pass through the content storage space L and enter the inner layer body 3. Even if solid matter is sandwiched between the slit valve 31a of the first check valve 31 and a gap is generated in the slit, if the content has a certain viscosity or more, it is stored in the content storage space L. The contents are not returned into the accommodation space S through the gap. Therefore, since the content is maintained in the content storage space L, the liquid seal can be maintained.

  Moreover, since the outer layer body 4 tries to return to the original shape by its own restoring force by releasing the pressure on the body portion 6, the space between the inner layer body 3 and the outer layer body 4 becomes a negative pressure. As a result, the pressure below the outside air introduction valve 45 also becomes negative through the through-hole 4c, the air passage T, and the groove 27, so that the valve body 45a is pulled downward and the outside air introduction valve 45 is opened. With the opening of the outside air introduction valve 45, air flows from the outside air introduction hole 16, and the space between the outer layer body 4 and the inner layer body 3 from the through hole 4c via the outer space K2, the groove 27, and the air passage T. Air is introduced into the. Thereby, the outer layer body 4 can be restored while the inner layer body 3 is deformed and deformed.

  In the present embodiment, since the slit valve 31a has a dome shape that protrudes toward the outlet hole 14a, tensile stress acts on the slit valve 31a when the inner layer body 3 has a positive pressure. Force to open the slit. On the other hand, when the positive pressure in the inner layer body 3 is released, the slit valve 31a is restored to its original shape by its own rigidity and closes the slit. In addition, as described above, since the displacement of the outer peripheral end of the slit valve 31a in the downward direction and the outer peripheral direction is restricted by the valve fixing portion 23, the slit is prevented from opening downward. That is, the first check valve 31 is easy to open in the direction from the inner layer body 3 toward the pouring hole 14a, and difficult to open in the direction in which the first check valve 31 tends to flow backward from the pouring hole 14a toward the inner layer body 3. It is configured as follows. Therefore, the force required to squeeze the body portion 6 can be reduced, and the content in the content storage space L can hardly be moved into the inner layer body 3, thereby enhancing the effect of the liquid seal.

  As described above, according to the present embodiment, the first check valve 31 having the slit valve 31a and the check valve valve body 43a having a three-point valve configuration are provided between the inner layer body 3 and the extraction hole 14a. The second check valve 43 is provided, and the content storage space L is provided between the first check valve 31 and the second check valve 43. With this configuration, the liquid seal is configured by the contents remaining in the content storage space L. Therefore, for example, the second check valve 43 is clogged with solids using contents including solids such as ingredients. However, it is possible to prevent the residual contents in the content storage space L from entering the accommodation space S by blocking outside air. In particular, in the present embodiment, the slit valve 31a of the first check valve 31 and the valve seat 33 of the second check valve 43 are integrally formed. 1 assembly man-hours can be reduced. Even if the first check valve 31 is clogged with solid matter and a gap is formed in the slit, the content will not flow from the gap if the content has a certain viscosity or more. Can do. In particular, by configuring the first check valve 31 close to the accommodation space S with the slit valve 31a, it is possible to reliably close the first check valve 31 and to block the outside air by releasing the pressing of the body portion 6. In addition, by configuring the second check valve 43 with a three-point valve that is easy to open instead of a slit valve, the pressing force of the body portion 6 necessary for dispensing the contents can be reduced. The present invention includes contents containing some solid materials, including sauces such as pasta sauce, pizza sauce, Worcester sauce, tonkatsu sauce, and liquid seasonings with ingredients such as ketchup, mayonnaise, dressing and miso soup. It can be used for housed purposes. In particular, when a relatively high-viscosity content is accommodated, the liquid sealing property is enhanced, and a remarkable effect is achieved.

  Further, according to the present embodiment, the slit valve 31a of the first check valve 31 has a dome shape that protrudes upward, and the outer peripheral end of the slit valve 31a regulates the displacement in the downward and outer peripheral directions. It was made to be supported by the fixing part 23. With this configuration, the first check valve 31 can be easily opened by the positive pressure in the inner layer body 3, while the contents are discharged from the inner layer body 3 when the positive pressure in the inner layer body 3 is released. It can be made difficult to open in the direction toward 14a.

  Further, according to the present embodiment, the inner plug 20 is provided between the cap body 10 and the upper end of the mouth peripheral wall 4a, and the valve fixing portion 23 that supports the slit valve 31a is formed integrally with the inner plug 20. I tried to do it. Thereby, the number of parts can be reduced, and the number of assembling steps of the double container cap 1 can be reduced.

  In addition, according to the present embodiment, the outside air introduction valve 45 communicated with the outside air introduction hole 16 and opened along with the restoration of the outer layer body 4 by releasing the squeeze is configured. Thus, when the body portion 6 is squeezed, pressure is also applied to the valve body 45a from below, so that the outside air introduction valve 45 is maintained in a closed state, and air between the inner layer body 3 and the outer layer body 4 leaks out. In addition, pressurization into the inner layer body 3 is not hindered. On the other hand, if the pressing of the body portion 6 is released, the space between the inner layer body 3 and the outer layer body 4 becomes negative pressure due to the restoring force of the outer layer body 4. As a result, the outside air introduction valve 45 is opened, so that air easily flows from the outside air introduction hole 16 and the outer layer body 4 can be restored while the inner layer body 3 is deformed and reduced in volume.

  In addition, according to the present embodiment, the second check valve 43 and the outside air introduction valve 45 are provided integrally with the annular wall 41, so the number of parts is reduced and the number of assembling steps of the double container cap 1 is reduced. can do.

  Further, according to the present embodiment, the valve body 45a of the outside air introduction valve 45 is configured to have a curved shape that is convex toward the inner layer body 3 side. Thus, the outside air introduction valve 45 can be kept closed until a predetermined negative pressure is applied.

  The double container cap 1 according to the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope according to the claims. For example, the outer layer body 4 and the inner layer body 3 are not limited to those formed by blow molding a parison having a laminated structure, and the outer layer body 4 and the inner layer body 3 are individually formed, and then the inner layer body 3 is formed as the outer layer body. 4 may be installed.

  FIG. 7 shows a state in which the double container cap 100 according to the second embodiment of the present invention is attached to the double container main body 2 adapted thereto. The double container cap 100 includes a cap body 10, an inner stopper 120, a check valve assembly 130, a coupling valve 40, and a lid 50. In addition, the double container cap 100 according to the present embodiment includes the shape of the valve fixing portion 123 constituting the inner stopper 120 and the shapes of the first check valve 131 and the valve seat 133 constituting the check valve assembly 130. However, there is no difference from the first embodiment except that the first check valve 31 and the valve seat 33 of the first embodiment are different. Therefore, here, the description will focus on the differences from the first embodiment.

  The check valve assembly 130 of the present embodiment includes a first check valve 131 having a narrower radial width than that of the first embodiment. Further, the width of the content storage space L provided between the first check valve 131 and the second check valve 43 due to the narrow width of the first check valve 131 is also the same. It is narrowly configured. Moreover, the shape of the valve seat 133 does not reduce the diameter upward as in the first embodiment, and has a substantially cylindrical shape with a constant radius.

  As described above, in the double container cap 100 according to the present embodiment, the valve seat 133 has a substantially cylindrical shape, so that the check valve assembly 130 is molded as a mold as compared with the first embodiment. There is no need to forcibly remove from the mold. Therefore, the check valve assembly 130 can be easily molded and the moldability is improved.

  Further, in the double container cap 100 according to the present embodiment, the radial width of the first check valve 131 is narrower than that of the first embodiment, so that the slit against the pressing force of the same body portion 6 is provided. The force received by the valve 131a is small. Therefore, since the 1st check valve 131 will be in an open state when the body part 6 is pressed more firmly, the 1st check valve 131 will be in an open state against the will of the user and the contents will leak out. There is nothing. Further, when the pressing of the body portion 6 is stopped, the first check valve 131 returns to the closed state more quickly, so that the content does not leak to the outside after the pressing is stopped.

  ADVANTAGE OF THE INVENTION According to this invention, even if the content containing some solid substance is accommodated, it becomes possible to provide the cap 1 for double containers which can suppress the penetration | invasion of the external air to the accommodation space S. FIG.

1,100 Double container cap 2 Double container body 3 Inner layer body 3a Upper opening 4 Outer layer body 4a Mouth peripheral wall (mouth)
4b Male thread part 4c Through hole 4d Groove part 6 Body part 8 Bottom part 10 Cap body 11 Outer peripheral wall 11a Step part 12a Female thread part 12b Three-thread male thread part 12d Rib 13 Top wall 13a, 13b Top wall step part 14 Outlet cylinder 14a Outlet hole 15 Upper fitting wall 16 Outside air introduction hole 19 Outlet plug 19a Protruding portion 19b Outer peripheral rib 19d Breaking portion 19e Recessed portion 20, 120 Middle plug 21, 121 Bulkhead 23, 123 Valve fixing portion 23a, 123a Pressing portion 23b, 123b Bottom wall 23c, 123c Inner side wall 23d, 123d Horizontal wall 23e, 123e Outer side wall 23f Arm 25 Fitting wall 26 Seal wall 27 Groove 30, 130 Check valve assembly 31, 131 First check valve 31a, 131a Slit valve 31b, 131b Side wall 31c 131c Slit base 33, 133 Valve seat 33a, 133a Communication 40 coupling valve 41 annular wall 43 second check valve 43a check valve valve body 43b check valve arm 43d protrusion 45 external air introduction valve 45a valve body 47 peripheral wall 50 lid body 52 upper wall 53 lid body peripheral wall 53a fixing band 53b rib 53c Protruding part 53d Breaking part 53e Three-thread female thread part 54 Outer seal cylinder 54a Rib 54b Inner seal cylinder 55 Fitting column 55a Protruding part 56 Abutting wall K1 Inner space K2 Outer space L Content storage space S Storage space T Air passage

Claims (5)

A double container cap mounted on a double container body comprising an inner layer body for containing contents and a squeezable outer layer body for containing the inner layer body,
A cap body having a pouring hole for pouring the contents from the inner layer body and attached to the mouth of the double container body;
Provided in the flow path between the inner layer body and the extraction hole, and shuts off the outflow of contents from the inner layer body in a closed state, while being opened by the pressure increase in the inner layer body due to the squeeze of the outer layer body A first check valve that allows the contents from the inner layer to pass through;
An increase in pressure in the inner layer due to squeezing of the outer layer body is provided in a flow path between the first check valve and the outlet hole and blocks outflow of contents from the inner layer body in a closed state. And a second check valve that opens with the first check valve to allow the contents from the inner layer body to pass through,
The first check valve has a slit valve,
The second check valve has a check valve body whose outer end is supported by an elastic arm, and a valve seat on which the check valve body is seated when the second check valve is closed. And
The valve seat and the slit valve are integrally molded,
A double content storage space is provided between the first check valve and the second check valve, in which a part of the remaining content is stored after the content is discharged. Cap for container.   2. The slit valve according to claim 1, wherein the slit valve has a dome shape that protrudes upward, and an outer peripheral end of the slit valve is supported by a valve fixing portion that restricts displacement in a downward direction and an outer peripheral direction. Heavy container cap. It further has an inner plug sandwiched between the cap body and the upper end of the mouth,
The double container cap according to claim 2, wherein the valve fixing portion is integrally formed with the inner stopper. The cap body is provided with an outside air introduction hole that introduces outside air into the space between the outer layer body and the inner layer body, along with restoration by squeezing the outer layer body,
The double container cap according to any one of claims 1 to 3, further comprising an outside air introduction valve that communicates with the outside air introduction hole and is opened when the outer layer body is restored by releasing the squeeze.   Further comprising an annular wall surrounding a flow path of contents from the inner layer body to the extraction hole, the second check valve is provided integrally on the inner peripheral surface of the annular wall, and the outside air introduction valve is The double container cap according to claim 4, which is integrally provided on an outer peripheral surface of the annular wall.

Images