JP6982845B2 - cap - Google Patents

Description

The present invention relates to a cap attached to the mouth of the container, and more particularly to a cap capable of satisfactorily taking out the contents while preventing air from entering the inside of the container.

For example, in Patent Documents 1 and 2, in a cap attached to the mouth of a container in which a content composed of a liquid or the like is housed, the content is satisfactorily taken out while preventing air from entering the container. The structures that can be disclosed are disclosed.

As shown in FIG. 14, the cap disclosed in Patent Document 1 is an inner lid (cap body) attached to the mouth 61 of a deformable container (deformable double container in this Patent Document 1) 60. It is composed of 62 and an upper lid 63 that is detachably attached to the upper surface of the inner lid 62. The inner lid 62 is provided with a sealing stopper 64 that is fitted into the mouth portion 61 of the container 60 to seal the mouth portion 61, and a liquid (content) is poured out to the top of the sealing stopper 64. The ejection tube portion 65 is formed.

Inside the inner lid 62, an on-off valve body 66 for opening and closing the open bottom of the sealing stopper 64 is provided so as to be able to move up and down. The inner lid 62 is sealed with a fitting wall portion 68 which is formed so as to hang down from the outer periphery of the upper surface portion of the sealing stopper 64 in a cylindrical shape having a large diameter and which fits into the inner wall surface of the mouth portion 61 of the container 60. The passing wall portion 69, which is formed so as to hang down from the inner peripheral portion inside the fitting wall portion 68 on the upper surface portion of the stopper 64 in a cylindrical shape having a medium-thick diameter and has an open bottom, and the sealing stopper 64. A support cylinder arm portion 67, which is formed so as to hang down from the center of the sealing plug 64 on the upper surface portion in a cylindrical shape having a small diameter and has a small diameter hole on the lower surface, is integrally formed. .. Further, the lower end portion of the inner circumference of the passage wall portion 69 facing the open bottom of the sealing plug 64 is configured to be in close contact with the on-off valve body 66 and is configured to seal the inside, while the inside of the passage wall portion 69. A passage groove portion (see FIG. 1 of Patent Document 1 and the like) through which the liquid as a content can pass upward is formed at a portion above the lower end portion in the circumference.

As shown in FIG. 15, the on-off valve body 66 extends upward from the central disk portion 66a and the central portion of the central disk portion 66a, and is inserted into the support tube arm portion 67 of the sealing plug 64 from below. Support shaft portion 66b, holding cylinder portion 66c extending upward from the outer peripheral portion of the central disk portion 66a to be fitted to the support cylinder arm portion 67 of the sealing plug 64 from the outer circumference, and holding cylinder portion. A check valve portion 66d that extends from the outer peripheral disk of 66c to open and close the open bottom of the sealing plug 64, and an on-off valve body that extends diagonally upward along the circumferential direction from the upper peripheral circumference of the holding cylinder portion 66c. A plurality of elastic portions 66f that urge the 66 downward are integrally formed. As shown in FIG. 15, the holding cylinder portion 66c does not have a notched gap or the like on the upper surface portion, and the elastic portion 66f is obliquely upward from the upper surface portion of the holding cylinder portion 66c along the circumferential direction. It is formed in a shape that extends to.

When assembling and manufacturing this cap, it is necessary to fit the on-off valve body 66 inside the sealing plug 64 of the inner lid body 62. That is, in a state where the on-off valve body 66 is gripped by using an assembly device such as a robot, the support shaft portion 66b of the on-off valve body 66 is fitted into the support arm portion 67 of the sealing plug 64, and the sealing plug 64 Accurately position the outer peripheral portion of the central disk portion 66a of the on-off valve body 66 to fit on the inner peripheral surface of the passage wall portion 69, and fit the on-off valve body 66 inside the sealing plug 64 of the inner lid body 62. Assemble the cap by inserting it.

When the container 60 to which this cap is attached is pressed from the outside and so-called squeeze, the on-off valve body 66 rises while resisting the urging force of the elastic portion 66f due to the pressure inside the container 60, and passes through the passage groove portion. It is configured so that the liquid of the contents can be poured out from the pouring cylinder portion 65. Further, when the container 60 is stopped from being pressed (squeezed) from the outside, the check valve portion 66d of the on-off valve body 66 is brought into close contact with the inner peripheral lower end portion of the passing wall portion 69 and sealed by the urging force of the elastic portion 66f. The open bottom of the stopper 64 is closed and sealed so that no liquid leaks. The container 60 to which this cap is attached is a double container. This double container is provided with an intake valve capable of sucking air in the outer container, and when the container 60 is stopped from being pressed (squeezed) from the outside, the outer container and the inner side are provided through the intake valve. It is configured so that air can flow in between the container and the container.

As shown in FIG. 16, the cap disclosed in Patent Document 2 has a cap body 72 attached to the mouth portion 71 of the deformable container 70 and a lid detachable from the top surface portion 74 of the cap body 72. It has a body 73. The cap body 72 has a top surface portion 74, a dispensing cylinder portion 75 that protrudes upward from the center portion of the top surface portion 74 in a nozzle shape to discharge liquid, and a cylindrical portion that hangs down from a portion near the outer periphery of the top surface portion 74. Then, the inner tubular fitting portion 76 that fits into the mouth portion 71 of the container 70 from the outer peripheral side, and the inner tubular fitting portion 76 that hangs down in a cylindrical shape from a portion near the center of the top surface portion 74 and is inside the opening portion 71a of the mouth portion 71 of the container 70. A lower cylindrical wall portion 77 that fits from the peripheral side is integrally formed. Further, inside the lower cylindrical wall portion 77, a circular base portion 78 having a discharge hole 78a and a check valve 79 having a valve member 79a capable of opening and closing the discharge hole 78a are arranged.

As shown in FIG. 16, the circular base portion 78 has a discharge hole 78a formed in the center, and the outer peripheral portion of the circular base portion 78 is in close contact with the lower end portion of the inner wall portion of the lower cylindrical wall portion 77. Arranged. As shown in FIGS. 17 and 18, the check valve 79 has a cylindrical portion having a short height and is arranged in close contact with the inner wall portion of the lower tubular wall portion 77, and a cylindrical portion 79b. A plurality of laterally elastic pieces 79c extending from the cylindrical portion 79b toward the center in a substantially radial direction, and a valve member 79a connected to the central portion of these laterally elastic pieces 79c and capable of opening and closing the discharge hole 78a of the circular base portion 78. And are integrally formed. A gap 79d through which the liquid of the contents passes when the valve member 79a is opened is formed between the laterally elastic pieces 79c of the check valve 79. Further, the lateral elastic piece 79c is connected to the valve member 79a in a state where the central side extends downward as well as in the substantially radial direction, and these lateral elastic pieces 79c urge the valve member 79a downward to form a circle. It is configured to be in close contact with the periphery of the discharge hole 78a of the base portion 78.

When assembling and manufacturing this cap, the check valve 79 is first fitted inside the lower cylindrical wall portion 77 of the cap body 72, and then the circular base portion 78 is fitted to complete the cap. Let me. That is, with the check valve 79 gripped by using an assembly device such as a robot, the inner peripheral surface of the lower tubular wall portion 77 of the cap body 72 and the outer peripheral portion of the cylindrical portion 79b of the check valve 79. First, the check valve 79 is fitted inside the lower cylindrical wall portion 77 of the cap body 72 by accurately positioning the cap body 72 so as to fit the two. Next, with the circular base portion 78 gripped, the inner peripheral surface of the lower cylindrical wall portion 77 of the cap main body 72 and the outer peripheral portion of the circular base portion 78 are accurately positioned so as to fit, and the cap main body is positioned. The cap is assembled by further fitting the circular base portion 78 inside the lower cylindrical wall portion 77 of the 72.

When the container 70 to which this cap is attached is pressed from the outside and so-called squeeze, the valve member 79a rises while resisting the urging force of the lateral elastic piece 79c due to the pressure inside the container 70, and the discharge hole 78a and the gap The liquid of the contents is poured out from the pouring cylinder portion 75 through 79d. When the container 70 is stopped from being pressed (squeezed) from the outside, the valve member 79a of the check valve 79 comes into close contact with the periphery of the discharge hole 78a of the circular base portion 78 due to the urging force of the lateral elastic piece 79c and discharges. The hole 78a is closed and sealed so that no liquid leaks.

Utility Model Registration No. 3194661 Gazette Japanese Unexamined Patent Publication No. 2013-241197

However, since the cap of Patent Document 1 has an extremely complicated structure (particularly, the structure of the on-off valve body 66), there is a problem that the manufacturing cost becomes high. Further, when assembling and manufacturing, the support shaft portion 66b of the on-off valve body 66 is fitted into the support arm portion 67 of the sealing plug 64 in a state where the on-off valve body 66 is gripped by using an assembly device such as a robot. Moreover, it must be accurately positioned so that the outer peripheral portion of the central disk portion 66a of the on-off valve body 66 fits on the inner peripheral surface of the passing wall portion 69 of the sealing plug 64. Therefore, there is a problem that the manufacturing efficiency is lowered and an extremely expensive assembly device is required, for example, it takes time to obtain the positioning accuracy.

Further, even with the cap of Patent Document 2, when the cap is assembled and manufactured, the inside of the lower cylindrical wall portion 77 of the cap body 72 is held while the check valve 79 is gripped by using an assembly device such as a robot. The peripheral surface and the outer peripheral portion of the cylindrical portion 79b of the check valve 79 must be accurately positioned so as to fit into each other. Further, after this, with the circular base portion 78 being gripped, the inner peripheral surface of the lower cylindrical wall portion 77 of the cap body 72 and the outer peripheral portion of the circular base portion 78 must be accurately positioned so as to fit each other. It doesn't become. Therefore, even in the process of assembling the cap, there is a problem that the manufacturing efficiency is lowered and an extremely expensive assembly device is required because it takes time to obtain the positioning accuracy.

As a method for solving the above problems, a cap 80 as shown in FIGS. 19 to 22 can be considered. The cap 80 is a cap 80 attached to the mouth portion 81a of the flexible container 81, and is a cap body 82 attached to the mouth portion 81a of the container 81 and a spout formed in the cap body 82. An 83 and a lid 84 for opening and closing the spout 83 are provided. An inner plug member 85 is attached to the inside of the cap main body 82, and the inner plug member 85 is formed with a discharge hole 86 leading to the inside of the container 81. Further, a check valve 89 having a circular valve body 90 capable of opening and closing the discharge hole 86 of the inner plug member 85 is housed in a space between the cap main body 82 and the inner plug member 85, and the inner plug member 85 is accommodated. Is formed in a bottomed tubular shape having a bottom surface portion 87 provided with a discharge hole 86 and a tubular side wall portion 88 extending upward in a cylindrical shape from the outer periphery of the bottom surface portion 87. The check valve 89 extends diagonally upward from the valve body 90 and the outer peripheral portion of the valve body 90 along the circumferential direction, and is attached in a direction in which the valve body 90 is brought into close contact with the peripheral wall portion of the discharge hole 86 of the inner plug member 85. It has a plurality of elastic arm portions 91 to force.

In the above configuration, when the container 81 to which the cap 80 is attached is pressed from the outside and so-called squeezed, as shown in FIG. 23, the urging force of the elastic arm portion 91 is caused by the pressured contents in the container 81. The valve body 90 of the check valve 89 is pushed up from the discharge hole 86 of the inner plug member 85, and the gap between the valve body 90 and the bottom surface portion 87 and the passage-combined gap 92 provided in the valve body 90 are provided. The liquid of the contents is poured out from the pouring port 83 through the pouring port 83. When the container 81 is stopped from being pressed (squeezed) from the outside, the valve body 90 of the check valve 89 is displaced by the urging force of the elastic arm portion 92 on the peripheral wall portion of the discharge hole 86 of the inner plug member 85 and the upper surface around the valve body 90. The discharge hole 86 is closed in close contact with the portion, and is sealed so as not to leak liquid.

According to this configuration, since the check valve 89 is provided, it is possible to satisfactorily take out the contents while preventing air from entering the inside of the container 81. Further, since the configuration can be relatively simple, the manufacturing cost can be suppressed. Moreover, since the inner plug member 85 has a bottomed tubular shape and the check valve 89 is provided with a plurality of elastic arm portions 91 extending along the circumferential direction on the outer peripheral side, the cap 80 is manufactured and assembled at the time of manufacturing and assembling. As shown in FIG. 24, a check valve 89 having a valve body 90 and a plurality of elastic arm portions 91 is simply moved by dropping it into the inside of a bottomed tubular inner plug member 85 to perform a check valve. The elastic arm portion 91 of the valve 89 can be easily stored while being guided by the tubular side wall portion 88 of the inner plug member 85, and then, as shown in FIG. 25, the inner plug in which the check valve 89 is housed. All that is required is to attach the member 85 to the cap body 82.

However, in the caps shown in FIGS. 19 to 25, when the check valve 89 is housed in the inner plug member 85, the check valve 89 is housed in the inner plug member 85 in a free state so as to be movable upward. Since there is nothing to restrict the upward movement of the check valve 89, the check valve 89 may strongly abut against the bottom surface portion 87 of the inner plug member 85 and jump up, and may fall off from the inner plug member 85. be. As described above, when the check valve 89 falls off from the inner plug member 85, the check valve 89 must be stored again, which reduces the work efficiency.

Further, even when the check valve 89 is attached to the cap, the check valve 89 can move relatively freely inside the inner plug member 85, so that the container 81 to which the cap 80 is attached is strongly pressed from the outside. When squeezed, the contents suddenly flow into the inside of the inner plug member 85, the check valve 89 becomes slanted inside the inner plug member 85, and the contents come out from the cap 80 in an unstable state. Or, the sealed state after that becomes unstable, and it may not be possible to seal well, and the reliability may decrease.

The present invention solves the above-mentioned problems, and it is possible to take out the contents satisfactorily while preventing air from entering the inside of the container, and not only can it be manufactured at a relatively low cost, but also the manufacturing efficiency at the time of assembly is high. It is an object of the present invention to provide a cap that is good and can maintain good reliability.

In order to solve the above problems, the present invention is a cap body attached to the mouth of a flexible container, which is attached to the mouth of the container and has a spout formed therein , and a note. A lid for opening and closing the outlet and a bottomed tubular inner plug member attached to the inside of the cap body are provided, and the inner plug member is a bottom portion provided with a discharge hole leading to the inside of the container. It has a tubular side wall portion extending upward in a tubular shape from the outer periphery of the bottom surface portion, and a regulating protrusion portion provided on the inner wall of the tubular side wall portion and projecting inward, and the discharge hole of the inner plug member is provided. A check valve having a valve body that can be opened and closed is provided, and the check valve has a plurality of elastic arm portions, and the valve body includes a fitting valve portion that is fitted into the discharge hole of the inner plug member. The check valve is provided with a pedestal portion extending to the outer peripheral side of the fitting valve portion and an inclined protruding portion formed on the outer peripheral surface of the pedestal portion and protruding while being inclined so that the diameter becomes larger toward the upper side. The slanted protrusion overcomes the restricting protrusion and is housed in the inner plug member, and the elastic arm portion urges the valve body in a direction in which the valve body is brought into close contact with the discharge hole peripheral wall portion of the inner plug member. The check valve housed in the inner plug member is restricted from moving upward by the restricting protrusion, and the inner plug member is attached to the inside of the cap body .

According to this configuration, when the check valve is housed in the inner plug member, once the check valve gets over the regulation protrusion and is stored inside the inner plug member, the check valve moves upward. It is regulated by the regulation protrusion and can prevent the check valve from falling off from the inner plug member.

According to this configuration, when the check valve is stored in the inner plug member, the outer peripheral surface of the pedestal portion of the check valve is moved in the storage direction in a state of being in contact with the regulation protrusion. Since an inclined protrusion that inclines so that the diameter becomes larger toward the upper side is formed on the outer peripheral surface of the pedestal portion, the check valve can get over the regulation protrusion relatively easily due to the inclined surface of the inclined protrusion. Can be done. On the other hand, once the check valve has passed over the regulation protrusion and is housed inside the inner plug member, the upward movement of the check valve is restricted by the regulation protrusion, so that the maximum diameter portion of the inclined protrusion is restricted. By making the size large enough to be overcome, it is possible to more reliably prevent the check valve from falling off from the inner plug member.

Further, it is preferable that the pedestal portion of the valve body is formed with a thick-walled portion that protrudes downward in a thick-walled shape and can be brought into close contact with the upper surface of the peripheral wall portion of the discharge hole of the inner plug member. According to this configuration, the thicker the thick portion, the smaller the movable dimension of the check valve inside the inner plug member can be reduced. That is, the amount of movement of the check valve can be adjusted by adjusting the thickness of the thick portion, and the check valve can be controlled relatively easily so as not to tilt inside the inner plug member.

According to the cap of the present invention, a regulating protrusion is provided on the inner wall of the cylindrical side wall portion of the inner plug member so as to project inward and regulate the check valve housed in the inner plug member from moving upward. As a result, when the check valve is stored in the inner plug member, the check valve can be prevented from falling off from the inner plug member, and the check valve storage work does not have to be redone, so that the work efficiency is improved. .. In addition, since the amount of movement inside the check valve inner plug member is restricted, it is possible to prevent the check valve from tilting inside the inner plug member, and the contents are unstable from the cap. It is possible to prevent the product from coming out in a bad condition or being unable to be sealed well, and good reliability can be maintained.

Further, the check valve is dropped from the inner plug member by providing the valve body of the check valve with an inclined projecting portion formed on the outer peripheral surface of the pedestal portion and projecting while inclining so that the diameter becomes larger toward the upper side. It is possible to prevent this from happening more reliably.

Further, the thickness of the thick portion is adjusted by forming a thick portion that can be closely attached to the upper surface of the peripheral wall portion of the discharge hole of the inner plug member by protruding downward from the pedestal portion of the valve body. Since the amount of movement of the check valve can be adjusted, the posture during movement can be controlled relatively easily so that the check valve does not tilt inside the inner plug member, and the reliability of the cap can be improved.

It is a vertical sectional view which shows the mouth part of the cap and the container which concerns on embodiment of this invention, and shows the state which the lid is closed. An overall perspective view of the cap shows the state in which the lid is opened. It is a top view of the inner plug member of the cap. It is a vertical sectional view of the inner plug member. It is an enlarged vertical sectional view of the main part of the inner plug member. It is a top view of the check valve of the same cap. It is a partial notch front view of the check valve. It is a bottom view (bottom view) of the check valve. It is a front view of the check valve. It is a vertical cross-sectional view which shows the state which the check valve is housed in the inner plug member in the same cap simply. It is a vertical cross-sectional view which shows the state which the check valve is housed in the inner plug member in the same cap simply. It is a vertical cross-sectional view which shows the state which attaches the inner plug member which accommodated the check valve to the cap body of the same cap. It is a vertical sectional view which shows the state which the contents (liquid) are poured out from the container which attached the cap. It is a vertical sectional view of a conventional cap. It is a perspective view of the opening / closing valve body of the conventional cap. It is a vertical sectional view of another conventional cap. It is a top view of the check valve of the other conventional cap. It is a vertical sectional view of the check valve of the other conventional cap. It is a vertical sectional view of another conventional cap. It is a perspective view of the inner plug member of the conventional cap. It is a perspective view of the check valve of the conventional cap. It is a front view of the check valve of the conventional cap. It is a vertical sectional view which shows the state which the contents (liquid) are poured out from the container which attached the conventional cap. It is a vertical cross-sectional view which shows the state which the check valve is housed in the inner plug member in the conventional cap simply. It is a vertical sectional view which shows the state which attaches the inner plug member containing the check valve to the cap body of the conventional cap.

Hereinafter, the cap according to the embodiment of the present invention will be described with reference to the drawings.
1 in FIGS. 1 and 2 is a flexible and deformable container, and 10 is a cap according to an embodiment of the present invention attached to the mouth portion 1a of the container 1. In this embodiment, the case where the container 1 is a double container composed of a flexible outer container 2 and an inner container 3 which are flexible and deformable, respectively, is described, but the present invention is not limited to this, and the container 1 is merely flexible. It may be a container that has properties and is deformable. Further, in this embodiment, the outer container 2 of the container 1 which is a double container is provided with an intake valve capable of sucking external air, and stops pressing (squeezing) the container 1 from the outside. At that time, air is configured to flow between the outer container 2 and the inner container 3 through the intake valve.

As shown in FIGS. 1 and 2, the cap 10 according to the embodiment of the present invention has a cap body 11 attached to the mouth portion 1a of the container 1 and a spout (pouring passage) formed in the cap body 11. ) 12, the lid 13 that opens and closes the spout 12, the inner plug member 30 attached to the inside of the cap main body 11, and the check valve 40 housed in the space between the cap main body 11 and the inner plug member 30. , Is equipped. In this embodiment, the cap body 11 and the lid 13 are integrally formed and connected to each other by a resin or the like via a deformable hinge portion 14, but the present invention is not limited to this.

The cap main body 11 has a pouring cylinder portion 15 in which a pouring outlet 12 is formed, a top surface portion 16 having a substantially circular top surface in a plan view in which the pouring cylinder portion 15 is provided so as to project upward, and the top surface portion 16. A tubular wall portion 17 that hangs down from the outer circumference in a cylindrical shape, an upper wall portion 18 that extends from the outer circumference of the tubular wall portion 17 to the outer peripheral side (outward in the radial direction), and a tubular wall portion 17 and an upper wall portion. The inner peripheral tubular portion 19 that extends downward from the connection portion with the 18 and is closely attached to the inner peripheral surface of the mouth portion 1a of the container 1, and the inner peripheral tubular portion 19 that extends downward from the outer periphery of the upper wall portion 18 to form a cylindrical shape. The outer peripheral cylindrical portion 20 that extends and is closely attached to the outer peripheral surface of the mouth portion 1a of the container 1 and the lower edge of the lid 13 that extends upward in a cylindrical shape (annular shape) from a portion near the outer periphery of the upper wall portion 18. A projecting piece portion 21 that can be closely attached to the inner peripheral surface of the portion and the like are integrally formed. Further, a locking claw portion 17a for locking the inner plug member 30 is integrally formed on the inner peripheral surface of the tubular wall portion 17 of the cap main body 11. The lid 13 has a protrusion 13a that can enter the spout 12 in the spouting cylinder 15 when the lid 13 is closed and can close the spout 12, and an outer periphery around the tip of the spouting cylinder 15. The outer peripheral protrusion 13b and the like that can be contacted from the above are also integrally formed.

The inner plug member 30 is attached to the inside of the cap main body 11 (the discharge passage leading to the mouth portion 1a of the container 1). As shown in FIGS. 1 and 3 to 5, the inner plug member 30 has a bottom surface portion 32 provided with a discharge hole 31 leading to the inside of the container 1 and a cylinder extending upward in a cylindrical shape from the outer periphery of the bottom surface portion 32. It is formed in the shape of a bottomed cylinder having a shaped side wall portion 33. A locking claw portion 33a that engages with the locking claw portion 17a of the cap body 11 in the circumferential direction to lock the inner plug member 30 is formed on the outer periphery of the upper edge portion of the tubular side wall portion 33. ..

Further, in this embodiment, the bottom surface portion 32 of the inner plug member 30 is a disk-shaped outer peripheral bottom surface portion 32a following the lower edge portion of the tubular side wall portion 33, and the inner peripheral portion to the center of the outer peripheral bottom surface portion 32a. A central annular portion 32b projecting downward on the side is provided, and a discharge hole 31 is formed in the central portion of the central annular portion 32b. In this embodiment, the portion of the central annular portion 32b where the discharge hole 31 is provided is formed so as to be slightly thinner (smaller) toward the upper side, but the present invention is not limited to this.

As shown in FIGS. 1 and 6 to 9, the check valve 40 has a substantially disk-shaped valve body 41 capable of opening and closing the discharge hole 31 of the inner plug member 30, and a circumference from the outer peripheral portion of the valve body 41. It has a plurality of (four in this embodiment) elastic arm portions 45 that extend diagonally upward along the direction and urge the valve body 41 in a direction in which the valve body 41 is brought into close contact with the peripheral wall portion of the discharge hole 31 of the inner plug member 30. It is integrally formed of resin or the like. The valve body 41 of the check valve 40 has a fitting valve portion 42 that fits into the discharge hole 31 of the inner plug member 30, and a discharge hole 31 of the inner plug member 30 that extends in a flange shape toward the outer peripheral side of the fitting valve portion 42. A pedestal portion 43 that can be closely attached to the upper surface of the peripheral wall portion of the above is formed.

In this embodiment, the fitting valve portion 42 of the valve body 41 is projected downward from the valve body 41 as a whole, and a recessed portion 42a recessed upward is formed in the center portion of the lower surface of the fitting valve portion 42. However, it is not limited to this. Further, the pedestal portion 43 of the valve body 41 has a disc-shaped portion 43a extending radially from the entire circumference of the outer peripheral edge portion of the fitting valve portion 42 to the outer periphery in the radial direction, and the disc-shaped portion 43a is viewed in a plan view at predetermined angles. Further, an outer extension portion 43b extending outward is integrally formed, and an elastic arm portion 45 is formed so as to extend upward from the outer extension portion 43b and then diagonally upward along the circumferential direction. Further, as shown in FIGS. 6 and 8, the portion of the pedestal portion 43 of the check valve 40 corresponding to the elastic arm portion 45 in a plan view is cut out so that the contents in the container 1 can pass through. A gap 46 is formed.

As shown in FIG. 1, the check valve 40 is arranged in a state of being accommodated in the space between the cap main body 11 and the inner plug member 30. Then, as simply shown in FIG. 1, the elastic arm portion 45 is formed in a shape along the inner peripheral surface of the tubular side wall portion 33 of the inner plug member 30. Further, in this embodiment, as shown in FIG. 7, the tip portion of the elastic arm portion 45 is horizontally extended. Further, in this embodiment, as shown in FIG. 1, a first ridge portion 22 protruding downward from the top surface portion 16 of the cap main body 11 in a ring shape is formed, and the tip portion of the elastic arm portion 45 is the cap main body. It is in contact with the lower surface of the first ridge portion 22 of 11 in a state of being elastically deformed. Then, the elastic arm portion 45 urges the valve body 41 in a direction in which the valve body 41 is brought into close contact with the peripheral wall portion of the discharge hole 31 of the inner plug member 30 (downward in this embodiment, etc.).

Further, in this embodiment, as shown in FIGS. 1, 4, and the like, the diameter between the tubular side wall portions 33 increases as the tubular side wall portion 33 of the inner plug member 30 moves away from the bottom surface portion 32 (that is, toward the upper side). It is formed in an inverted truncated cone shape that becomes larger. Correspondingly, as shown in FIGS. 1, 7, 9, 9 and the like, the elastic arm portion 45 of the check valve 40 is reversed upward so as to be along the tubular side wall portion 33 of the inner plug member 30. The valve 40 is formed in a shape that extends in the radial direction.

Further, as shown in FIG. 4, the discharge hole 31 of the inner plug member 30 is formed in a truncated cone shape in which the diameter becomes smaller toward the lower side communicating with the inside of the container 1, and the check valve 40 corresponds to this. The fitting valve portion 42 of the above is also formed in a truncated cone shape whose diameter becomes smaller toward the lower side.

In addition to the above configuration, as shown in FIGS. 4 and 5, the inner wall of the tubular side wall portion 33 of the inner plug member 30 protrudes inward from the inner wall surface and is housed in the inner plug member 30. A regulation protrusion 47 that regulates the movement of the valve 40 upward is provided. In this embodiment, as shown in an enlarged manner in FIG. 5, the regulation protrusion 47 is projected toward the inner peripheral side in a substantially triangular cross section (mountain shape).

Further, in this embodiment, as shown in FIGS. 7 and 9, the check valve 40 protrudes toward the outer peripheral surface of the pedestal portion 43 in the valve body 41 while being inclined so as to have a larger diameter toward the upper side. Specifically, an inclined protruding portion 43c (protruding radially (sideways) from the elastic arm portion 45 when the check valve 40 is viewed from the side) is formed.

Further, the pedestal portion 43 of the valve body 41 of the check valve 40 is formed with a thick-walled portion 43d that protrudes downward in a thick-walled manner and can be brought into close contact with the upper surface of the peripheral wall portion of the discharge hole of the inner plug member. In this embodiment, the thick portion 43d is formed on the extension portion 43b of the pedestal portion 43, but is not formed on the disc-shaped portion 43a.

Further, in this embodiment, as shown in FIG. 1, when the check valve 40 is sealed, the check valve 40 is provided at two places with respect to the bottom surface portion 32 of the inner plug member 30. The outer peripheral portion of the fitting valve portion 42 of the check valve 40 is in contact with the connection portion between the outer peripheral bottom surface portion 32a and the central annular portion 32b in the bottom surface portion 32 of the inner plug member 30. The bottom disk-shaped portion of the fitting valve portion 42 of the check valve 40 is freely contacted and separated from the inner peripheral tip portion of the central annular portion 32b in the bottom surface portion 32 of the inner plug member 30). However, the shape is not limited to this, and the shape may be appropriately changed according to the properties of the contents and the like.

In the above configuration, at the time of manufacturing and assembling the cap, as shown in FIG. 10, first, the check valve 40 is moved relatively downward by dropping it inside the bottomed tubular inner plug member 30 or the like. The check valve 40 is relatively moved (lowered) so as to be housed inside the inner plug member 30. As a result, the check valve 40 is housed inside the inner plug member 30 while the elastic arm portion 45 of the check valve 40 and the like are guided by the tubular side wall portion 33 of the inner plug member 30 (see FIG. 11).

In this case, since the regulation protrusion 47 is provided on the inner wall of the tubular side wall portion 33 of the inner plug member 30, the check valve 40 gets over the regulation protrusion 47 and the inner plug 47 as shown in FIG. Once housed inside the member, the upward movement of the check valve 40 is restricted by the restricting protrusion 47, preventing the check valve 40 from jumping out above the inner plug member 30 and falling off. As a result, it is not necessary to redo the storage work of the check valve 40, so that the work efficiency is improved.

Further, according to the above configuration, when the check valve 40 is stored in the inner plug member 30, the outer peripheral surface of the pedestal portion 43 of the check valve 40 is moved in the storage direction in a state of being in contact with the regulation protrusion 47. However, since the inclined protrusion 43c is formed on the outer peripheral surface of the pedestal portion 43 of the check valve 40 so that the diameter becomes larger toward the upper side, the inclined protrusion 43c is formed. The inclined surface of 43c allows the check valve 40 to get over the regulation protrusion 47 relatively easily. On the other hand, since the inclined protrusion 43c protrudes so as to have a larger diameter toward the upper side, once the check valve 40 gets over the regulation protrusion 47 and is housed inside the inner plug member 30, the check valve 40 The upward movement of the check valve 40 is restricted by the regulation protrusion 47, and the check valve 40 is prevented from falling off from the inner plug member 30 by making the size large enough to overcome the maximum diameter portion of the inclined protrusion 43c. It can be reliably prevented.

After the check valve 40 is housed inside the inner plug member 30, as shown in FIG. 12, the inner plug member 30 in which the check valve 40 is housed is pushed upward into the cap body 11 ( Push upward from the inside of the inner peripheral tubular portion 19). As a result, the locking claw portion 33a of the inner plug member 30 engages with the locking claw portion 17a of the cylindrical wall portion 17 of the cap main body 11, and the inner plug member 30 and the check valve 40 are engaged with the cap main body. It can be easily attached to the inside of the tubular wall portion 17 or the inner peripheral tubular portion 19 of 11.

In the above configuration, when the container 1 to which the cap 10 is attached is pressed from the outside and so-called squeezed, as shown in FIG. 13, the urging force of the elastic arm portion 45 is caused by the pressured contents in the container 1. The valve body 41 of the check valve 40 is pushed up from the discharge hole 31 of the inner plug member 30 and passes through the gap between the valve body 41 and the bottom surface portion 32 and the passage-combined gap 46, and the spout 12 The liquid of the contents is poured out from. Further, when the container 1 is stopped from being pressed (squeezed) from the outside, the valve body 41 of the check valve 40 is displaced by the urging force of the elastic arm portion 45 to the discharge hole 31 peripheral wall portion of the inner plug member 30 and the upper surface around the valve body 41. The discharge hole 31 is closed in close contact with the portion, and is sealed so as not to leak liquid. At this time, the spout 12 (inside the spouting cylinder portion 15) of the cap body 11 in which the check valve 40 is housed, the top surface portion 16 in which the check valve 40 is housed, and the inner plug member 30. The contents accumulated between the two are returned to the inside of the container 1 by the negative pressure in the container 1. As described above, the cap 10 makes it possible to satisfactorily take out the contents while preventing air from entering the inside of the container 1. Moreover, since the configuration is relatively simple, it is possible to reduce the manufacturing cost.

Further, when the container 1 is pressed (squeezed), the valve body 41 of the check valve 40 is pushed up inside the inner plug member 30 by the contents to be poured out, but the inner plug member 30 is regulated. A portion 47 is provided to regulate the amount of movement of the check valve 40 inside the inner plug member 30. As a result, it becomes possible to prevent the check valve 40 from tilting inside the inner plug member 30, and the contents may come out of the cap 10 in an unstable state or may not be sealed well. Can be prevented and good reliability can be maintained.

Further, in the above configuration, the pedestal portion 43 of the valve body 41 is formed with a thick-walled portion 43d that protrudes downward in a thick-walled shape and can be in close contact with the upper surface of the peripheral wall portion of the discharge hole 31 of the inner plug member 30. The movement amount of the check valve 40 can be adjusted by adjusting the thickness of the thick portion 43d. As a result, the posture during movement can be controlled relatively easily so that the check valve 40 does not tilt inside the inner plug member 30, and the reliability of the cap 10 can be improved.

Further, in the above configuration, the thick portion 43d is formed on the outer extension portion 43b of the pedestal portion 43, but is not formed on the disc-shaped portion 43a. There is an advantage that an object can be satisfactorily discharged between a disk-shaped portion 43a on which a thick portion 43d is not formed and a bottom surface portion 32, and through a passage-combined gap 46.

In the above embodiment, the case where the check valve 40 has four elastic arm portions 45 is described, but the present invention is not limited to this, and two, three, or five or more may be provided. Of course.

Further, in the above embodiment, the case where the cap 10 is plugged into the container 1 and attached is illustrated, but the present invention is not limited to this, and the cap 10 is screwed into a so-called screw type cap to be attached to the container. Can also be applied.

1 Container 10 Cap 11 Cap body 12 Outlet 13 Lid 16 Top surface 17 Cylindrical wall 30 Inner plug member 31 Discharge hole 32 Bottom 33 Cylindrical side wall 40 Check valve 41 Valve body 42 Fitting valve 43 Pedestal 43a Disk-shaped part 43b Outer extension part 43c Inclined protrusion 43d Thick part 45 Elastic arm part 46 Passage combined gap 47 Restriction protrusion

Claims (2)

A cap attached to the mouth of a flexible container,
A cap body attached to the mouth of the container and formed with a spout, a lid for opening and closing the spout, and a lid.
A bottomed tubular inner plug member attached to the inside of the cap body is provided.
The inner plug member is
A bottom portion provided with a discharge hole leading to the inside of the container, and a bottom portion.
A cylindrical side wall portion extending upward in a cylindrical shape from the outer periphery of the bottom surface portion,
With a regulatory protrusion provided on the inner wall of the tubular side wall and protruding inward
Have,
A check valve having a valve body capable of opening and closing the discharge hole of the inner plug member is provided.
The check valve is
Multiple elastic arms
Have,
The valve body
A fitting valve portion that fits into the discharge hole of the inner plug member,
A pedestal portion extending to the outer peripheral side of the fitting valve portion and a pedestal portion
An inclined protrusion that is formed on the outer peripheral surface of the pedestal and protrudes while being inclined so that the diameter becomes larger toward the upper side.
Is provided,
In the check valve, the inclined protrusion portion overcomes the regulation protrusion portion and is housed in the inner plug member.
The elastic arm portion urges the valve body in a direction in which the valve body is brought into close contact with the discharge hole peripheral wall portion of the inner plug member.
The check valve housed in the inner plug member is restricted from moving upward by the restricting protrusion.
A cap characterized in that the inner plug member is attached to the inside of the cap body. The base portion of the valve body, projecting into thick shaped downwards, according to claim 1, characterized in that closely possible the thick portion in the peripheral wall portion upper face of the discharge hole of the inside plug member is formed cap.

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