JP2017197266A - Double container cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double container cap capable of suppressing incursion of outside air into a storage space S even when a content including a slightly solid matter is stored.SOLUTION: A double container cap 1 is provided with: a cap body 10 that has a discharge hole 14a; a first check valve 30 that is set in an open state by a pressure increase in an inner layer body 3 caused by squeezing of an outer layer body 4 and that is provided between the inner layer body 3 and the discharge hole 14a; and a second check valve 43 that is set in an open state by the pressure increase in the inner layer body 3 and that is provided between the first check valve 30 and the discharge hole 14a, and characterized in that the first check valve 30 has a slit structure, the second check valve 43 has an outer peripheral side end of a valve body supported by a plurality of elastic arms, and a content storage space L for storing a part of a residual content is provided between the first check valve 30 and the second check valve 43.SELECTED DRAWING: Figure 1

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 structure,
In the second check valve, the outer peripheral side end of the valve body is supported by a plurality of elastic arms,
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 member which controls the displacement to a downward and outer peripheral direction.

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 one Embodiment of this invention. It is sectional drawing of the cap for double containers which concerns on one Embodiment of this invention. It is a bottom view showing the 1st check valve (slit valve) and valve fixing member which constitute the double container cap concerning one embodiment of the present invention. It is a top view which shows the 2nd non-return valve (three-point valve) which comprises the cap for double containers which concerns on one Embodiment of this invention. It is a half section showing the composition of (a) a lid which constitutes the double container cap concerning one embodiment of the present invention, and (b) a cap main part (all after opening a lid). In the double container cap which concerns on one 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.

  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 an 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 first check valve 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 pouring stopper 19, and it penetrates into the rib 54a intermittently provided in the circumferential direction on the inner peripheral surface of the seal part 54 of the lid 50 which will be described later. As a result, the displacement of the discharge plug 19 in the circumferential direction 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.

  In the center of the partition wall 21, a communication port 23 a that connects the inside of the inner layer body 3 and the extraction hole 14 a is provided, and an upper end portion of a wall surface that forms the communication port 23 a is a second check valve 43 that will be described later. The non-return valve valve body 43a constitutes the valve seat 23.

  In addition, two fitting walls 25 having a cylindrical shape are provided concentrically on the outer peripheral side of the valve seat 23 on the upper surface of the partition wall 21. The two fitting walls 25 form an upwardly open groove. On the other hand, a valve fitting cylinder 24 hangs directly below the fitting wall 25 on the lower surface of the partition wall 21. The valve fitting cylinder 24 plays a role of fitting and holding a first check valve 30 described later. An annular seal wall 26 that sandwiches the inner layer body 3 with the outer layer body 4 is provided on the outer peripheral side of the valve fitting cylinder 24. As shown in FIG. 2, at least one groove 27 is provided on the outer edge of the partition wall 21.

  A first check valve 30 having a slit valve configuration is fitted to the inner peripheral surface of the valve fitting cylinder 24. In the first check valve 30, a slit valve body 31a having a cross-shaped slit in the center and having a convex dome shape is integrally formed with a cylindrical slit base 31c via a side wall 31b extending upward. ing. The first check valve 30 is fixed to the inner plug 20 by the base 33 d of the valve fixing member 33 pressing the slit base 31 c against the lower surface of the partition wall 21. At this time, the bottom wall 33b and the side wall 33c of the valve fixing member 33 are in contact with the outer peripheral end of the slit valve body 31a to restrict the displacement in the downward and outer peripheral directions. The valve fixing member 33 is fitted and fixed to the inner plug 20 when the outer peripheral surface of the base 33 d is undercut engaged with the inner peripheral surface of the valve fitting cylinder 24.

  The bottom wall 33b of the valve fixing member 33 is provided with a pressing portion 33a protruding upward via an arm 33e shown in FIG. The pressing portion 33a is provided to press the slit valve body 31a from below to slightly open the slit. This prevents the slits of the slit valve body 31a from sticking to each other and not being opened.

  A second check valve 43 is provided between the dispensing hole 14 a and the inner plug 20. 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 23, 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 increases due to the squeeze of the outer layer body 4, first, the slit valve body 31a of the first check valve 30 is elastically deformed upward to open the slit, and the first check valve 30 and the second reverse valve 30 The pressure in the content storage space L between the stop 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 23. (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 body 31a is closed, and no pressure is applied to the check valve valve body 43a, so that the check valve valve body 43a has its own weight and the check valve arm 43b. The second check valve 43 is closed by coming into contact with the valve seat 23 again by the elastic force.

  The content storage space L shown in FIG. 2 provided between the first check valve 30 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 body 31a of the first check valve 30 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.

  In addition, the 1st check valve 30 and the 2nd check valve 43 can be comprised with soft materials, such as rubber | gum and an elastomer, for example.

  In the present embodiment, the slit valve body 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 body 31a may have a convex shape on the lower side, It may be a planar shape. In addition, the slit formed in the slit valve body 31a may have a shape other than a cross shape, for example, a curve, and the number 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 between the pair of fitting walls 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 is formed on the radially inner side of the annular wall 41 so that the communication port 23a and the extraction hole 14a communicate with each other to form a content flow path. 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, a three-thread female thread portion 53e configured to be screw-engageable with a three-thread male thread portion 12b provided on the upper end of the outer peripheral wall 11 of the cap body 10 is provided. 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 seal portion 54 is provided that enters the inside of the extraction cylinder 14 and seals the extraction hole 14a when the lid 50 is closed. Yes. 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 downward on the outer peripheral side of the seal portion 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 body 31a of the first check valve 30 to open the slit, the gap between the first check valve 30 and the second check valve 43 is set. The pressure in the content storage space L is also increased. The check valve body 43a of the second check valve 43 is lifted from the valve seat 23 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 body 31a, and further passes through the gap between the check valve valve body 43a and the valve seat 23, and then passes through the inner space K1. It is poured out through the dispensing hole 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 slit valve body 31a of the first check valve 30 is closed. Since the pressure in the content storage space L also decreases in conjunction with the pressure drop in the inner layer body 3, the check valve body 43a of the second check valve 43 also contacts the valve seat 23 and closes. At this time, as shown in FIG. 6, a part of the content that remains without being discharged is stored in the content storage space L, thereby forming a liquid seal. That is, even if the solid matter contained in the content is sandwiched between the check valve valve body 43a and the valve seat 23 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 body 31 a of the first check valve 30. 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. Further, even when solid matter is sandwiched between the slit valve body 31a of the first check valve 30 and a gap is generated in the slit, if the solid matter has a certain viscosity or more, it is stored in the content storage space L. The content that has been made does not return 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, the slit valve body 31a has a dome shape that protrudes toward the outlet hole 14a. Therefore, when the inner layer body 3 has a positive pressure, tensile stress is applied to the slit valve body 31a. A force in a direction to act to open the slit acts. On the other hand, when the inside of the accommodation space S becomes a negative pressure, a compressive stress acts on the slit valve body 31a and a force in the direction of closing the slit acts. Moreover, as described above, the outer peripheral end of the slit valve body 31a is configured so as not to release the compressive stress because displacement in the downward direction and the outer peripheral direction is restricted by the valve fixing member 33. Further, the restriction of the downward displacement and the outer peripheral displacement suppresses the slit from opening downward. That is, the first check valve 30 is easy to open in the direction from the inner layer body 3 toward the pouring hole 14a, and is difficult to open in the direction in which the first check valve 30 tries 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 30 having the slit valve body 31a between the inner layer body 3 and the extraction hole 14a, and the check valve valve body 43a having a three-point valve configuration. The second check valve 43 having the above is provided, and the content storage space L is provided between the first check valve 30 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 addition, even if the first check valve 30 is clogged with solid matter and a gap is formed in the slit, the content does not flow out of the gap if the content has a certain viscosity or more, so that the liquid seal can be maintained. it can. In particular, by configuring the first check valve 30 close to the accommodation space S with the slit valve body 31a, the first check valve 30 can be reliably closed by shutting off the pressure of the body portion 6 and the outside air can be shut off. . 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 body 31a of the first check valve 30 has a dome shape that protrudes upward, and the outer peripheral end of the slit valve body 31a restricts the displacement in the downward and outer peripheral directions. It is made to be supported by the valve fixing member 33 to do. With this configuration, the first check valve 30 can be easily opened by the positive pressure in the inner layer body 3, but can be more reliably closed by the negative pressure in the inner layer body 3.

  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.

  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.

DESCRIPTION OF SYMBOLS 1 Double container cap 2 Double container main body 3 Inner layer body 3a Upper opening 4 Outer layer body 4a Mouth part peripheral wall (mouth part)
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 19a Protruding portion 19b Outer peripheral rib 19d Breaking portion 19e Recess 20 Inner plug 21 Bulkhead 23 Valve seat 23a Communication port 24 Valve fitting cylinder 25 Fitting wall 26 Seal wall 27 Groove 30 First 1 check valve 31a slit valve body 31b side wall 31c slit base 33 valve fixing member 33a pressing portion 33b bottom wall 33c side wall 33d base 33e arm 40 coupling valve 41 annular wall 43 second check valve 43a check valve body 43b check valve Valve arm 43d Projection part 45 Outside 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 Sealing part 54a Rib 55 Fitting column 55a Protruding part 56 Abutting wall K1 Outer space K2 Outer space L Content storage space S Storage space T Air passage

Claims (4)

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 structure,
In the second check valve, the outer peripheral side end of the valve body is supported by a plurality of elastic arms,
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 member that regulates displacement in a downward direction and an outer peripheral direction. Heavy container cap. 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,
3. The double container cap according to claim 1, 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 3, wherein the double container cap is integrally provided on an outer peripheral surface of the annular wall.

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