JP2017030844A - cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cap capable of allowing content to be readily taken out, while preventing entry of air into the inside of a container, and having good manufacturing efficiency at the time of assembling.SOLUTION: An inner plug member 30 is attached to the inside of a cap body 11 installed to a mouth portion 1a of a container 1, and a check valve 40 having a circular valve body 41 capable of opening/closing a discharge hole 31 of the middle plug member 30 is stored in a space between the cap body 11 and the middle plug member 30. The middle plug member 30 is formed in a bottomed cylinder shape which has a disc-shaped bottom portion 32 provided with the discharge hole 31, and a cylindrical side wall portion 33 extending from an outer periphery of the disc-shaped bottom portion 32 to an upper side of a cylinder shape. The check valve 40 has a valve body 41, and a plurality of elastic arm portions 45 extending from an outer peripheral portion of the valve body to a diagonal upper side in a circumferential direction to energize the valve body 41.SELECTED DRAWING: Figure 1

Description

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

  For example, in Patent Documents 1 and 2, in a cap attached to a mouth portion of a container in which contents made of liquid or the like are stored, the contents are put out well while preventing air from entering the container. A possible structure is disclosed.

  As shown in FIG. 11, the cap disclosed in Patent Document 1 includes an inner lid body (cap body) 62 attached to a mouth 61 of a deformable container (double container in Patent Document 1), The upper lid 63 is detachably attached to the upper surface of the inner lid 62. The inner lid 62 is provided with a sealing plug 64 that fits into the mouth portion 61 of the container 60 and seals the mouth portion 61, and the liquid (content) is poured into the top of the sealing plug 64. An outlet tube portion 65 is formed.

  On the inner side of the inner lid body 62, an opening / closing valve body 66 is provided so as to be movable up and down so that the bottom of the sealing plug 64 opened can be opened and closed. The inner lid 62 is formed so as to hang downward from the outer periphery of the upper surface of the sealing plug 64 into a large-diameter cylindrical shape, and is fitted with a fitting wall 68 that fits into the inner wall of the mouth 61 of the container 60. A passage wall portion 69 that is formed so as to hang downwardly from the inner peripheral portion inside the fitting wall portion 68 on the upper surface portion of the plug 64 in a cylindrical shape having a middle diameter and is open at the bottom, and the sealing plug 64 A supporting cylinder arm portion 67 is formed integrally with the sealing plug 64 in the upper surface portion so as to hang downward from the center portion of the sealing plug 64 and has a small-diameter hole opened in the lower surface. The lower end of the inner periphery of the passage wall 69 facing the open bottom of the sealing plug 64 can be brought into close contact with the on-off valve body 66 and is configured to seal the inside. A passage groove (see FIG. 1 of Patent Document 1) through which the liquid as the contents can be passed upward is formed at a location above the lower end of the circumference.

  As shown in FIG. 12, the open / close valve body 66 is inserted into the support disc arm portion 67 of the sealing plug 64 from below from the center disc portion 66a and the center disc portion 66a. A support shaft portion 66b, a holding cylinder portion 66c that extends upward from the outer peripheral portion of the central disc portion 66a and can be fitted to the support cylindrical arm portion 67 of the sealing plug 64 from the outer periphery, and a holding cylinder portion A check valve portion 66d that extends from 66c in the form of an outer peripheral disk and opens and closes the opened bottom of the sealing plug 64, and extends obliquely upward along the circumferential direction from the outer periphery of the upper surface of the holding cylinder portion 66c, A plurality of elastic portions 66f that urge 66 downward are integrally formed. As shown in FIG. 12, the holding cylinder portion 66c does not have a gap or the like cut out on the upper surface portion, and the elastic portion 66f extends obliquely upward along the circumferential direction from the upper surface portion of the holding cylinder portion 66c. It is formed in the shape extended to.

  When the cap is assembled and manufactured, it is necessary to fit the opening / closing valve body 66 inside the sealing plug 64 of the inner lid body 62. That is, in a state where the opening / closing valve body 66 is gripped using an assembly device such as a robot, the support shaft portion 66b of the opening / closing valve body 66 fits in the support arm portion 67 of the sealing plug 64, and the sealing plug 64 The opening / closing valve body 66 is fitted inside the sealing plug 64 of the inner lid body 62 by positioning accurately so that the outer peripheral portion of the central disk portion 66a of the opening / closing valve body 66 is fitted to the inner circumferential surface of the passage wall portion 69. Assemble the cap.

  When the container 60 to which this cap is attached is pressed from the outside so as to be squeezed, the on-off valve body 66 rises against the urging force of the elastic portion 66f due to the pressure in the container 60, and passes through the passage groove. It is comprised so that the liquid of the content can be poured out from the extraction cylinder part 65. FIG. 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 lower end portion of the inner periphery of the passage wall portion 69 by the urging force of the elastic portion 66f. The open bottom of the plug 64 is closed and sealed so as not to leak. 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 into the outer container. When the container 60 is stopped from being pressed (squeezed) from the outside, the outer container and the inner container are passed through the intake valve. Air is introduced between the container and the other container.

  As shown in FIG. 13, the cap disclosed in Patent Document 2 includes a cap body 82 that is attached to the mouth portion 81 of the deformable container 80, and a lid that is detachable from the top surface portion 84 of the cap body 82. And a body 83. The cap body 82 has a top surface portion 84, a dispensing tube portion 85 that projects upwardly from the central portion of the top surface portion 84 in a nozzle shape and pours liquid, and hangs in a tubular shape from a position near the outer periphery of the top surface portion 84. An inner cylindrical fitting portion 86 that fits into the mouth portion 81 of the container 80 from the outer peripheral side, and a cylindrical shape that hangs down from the central portion of the top surface portion 84 to the opening portion 81a of the mouth portion 81 of the container 80. A lower cylindrical wall portion 87 fitted from the circumferential side is integrally formed. Further, a circular base portion 88 having a discharge hole 88a and a check valve 89 having a valve member 89a capable of opening and closing the discharge hole 88a are disposed inside the lower cylindrical wall portion 87.

  As shown in FIG. 13, the circular base portion 88 is formed with a discharge hole 88 a in the center, and the outer peripheral portion of the circular base portion 88 is in close contact with the vicinity of the lower end portion of the inner wall portion of the lower cylindrical wall portion 87. Arranged. As shown in FIGS. 14 and 15, the check valve 89 has a cylindrical portion 89 b that is cylindrical with a short height and is disposed in close contact with the inner wall portion of the lower cylindrical wall portion 87. A plurality of lateral elastic pieces 89c extending from the cylindrical portion 89b toward the substantially radial center, and a valve member 89a connected to the central portion of the lateral elastic pieces 89c and capable of opening and closing the discharge hole 88a of the circular base portion 88. And are integrally formed. Note that a gap 89d is formed between the lateral elastic pieces 89c of the check valve 89 through which the liquid of the contents passes when the valve member 89a is opened. The lateral elastic pieces 89c are connected to the valve member 89a in a state where the central side extends downward as well as substantially in the radial direction. These lateral elastic pieces 89c are circular by urging the valve member 89a downward. The base portion 88 is configured to be in close contact with the periphery of the discharge hole 88a.

  When assembling and manufacturing the cap, the check valve 89 is first fitted into the lower cylindrical wall portion 87 of the cap body 82, and the circular base portion 88 is then fitted, thereby completing the cap. Let That is, with an assembly device such as a robot, the inner peripheral surface of the lower cylindrical wall portion 87 of the cap body 82 and the outer peripheral portion of the cylindrical portion 89b of the check valve 89 in a state where the check valve 89 is gripped. The check valve 89 is first fitted into the lower cylindrical wall portion 87 of the cap body 82. Next, in a state where the circular base portion 88 is gripped, the cap body 82 is accurately positioned so that the inner peripheral surface of the lower cylindrical wall portion 87 of the cap main body 82 and the outer peripheral portion of the circular base portion 88 are fitted together. The cap is assembled by fitting a circular base portion 88 into the lower cylindrical wall portion 87 of the 82.

  When the container 80 to which this cap is attached is pressed from the outside so-called squeeze, the valve member 89a rises against the urging force of the lateral elastic piece 89c due to the pressure in the container 80, and the discharge hole 88a and the gap The liquid of the contents is poured out from the dispensing cylinder portion 85 through 89d. When the container 80 is stopped from being pressed (squeezed) from the outside, the valve member 89a of the check valve 89 is brought into close contact with the periphery of the discharge hole 88a of the circular base portion 88 by the urging force of the lateral elastic piece 89c. The hole 88a is closed and sealed so as not to leak.

Utility Model Registration No. 3194661 JP2013-241197A

  However, the cap of Patent Document 1 has an extremely complicated structure (particularly, the structure of the on-off valve body 66), and therefore has a problem that the manufacturing cost is expensive. 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. In addition, it must be positioned accurately so that the outer peripheral portion of the central disc portion 66a of the on-off valve body 66 is fitted to the inner peripheral surface of the passage wall portion 69 of the sealing plug 64. Accordingly, there is a problem in that it takes time to obtain positioning accuracy and the manufacturing efficiency is reduced, and an extremely expensive device is required as an assembly device.

  Further, even in the cap of Patent Document 2, the inner wall of the lower cylindrical wall portion 87 of the cap body 82 is held in a state where the check valve 89 is gripped by using an assembly device such as a robot when assembling and manufacturing. It must be positioned accurately so that the peripheral surface and the outer peripheral portion of the cylindrical portion 89b of the check valve 89 fit. Further, after that, in a state where the circular base portion 88 is gripped, the inner peripheral surface of the lower cylindrical wall portion 87 of the cap main body 82 and the outer peripheral portion of the circular base portion 88 must be accurately positioned. Don't be. Therefore, even in the assembly process of the cap, it takes time to obtain positioning accuracy. For example, the production efficiency is lowered, and an extremely expensive apparatus is required as an assembly apparatus.

  The present invention solves the above-mentioned problems, and while being able to prevent the air from entering the inside of the container, the contents can be taken out well, can be manufactured relatively inexpensively, and the manufacturing efficiency during assembly is good. The purpose is to provide a cap.

  In order to solve the above problems, a cap according to the present invention is a cap that is attached to a mouth portion of a flexible container, and is formed on the cap body that is attached to the mouth portion of the container, and the cap body. A spout and a lid for opening and closing the spout, and an inner plug member is attached to the inside of the cap body. The inner plug member has a discharge hole communicating with the inside of the container. A check valve having a circular valve body capable of opening and closing the discharge hole of the member is accommodated in a space between the cap body and the inner plug member, and the inner plug member is a disc-shaped bottom portion provided with the discharge hole. And a bottomed cylindrical shape having a cylindrical side wall extending upward from the outer periphery of the disk-shaped bottom, and the check valve is circumferentially connected to the valve body and the outer periphery of the valve body. That extends diagonally upward while adhering to the inner wall of the plug member and closely contacts the peripheral wall of the outlet hole of the inner plug member And having a plurality of resilient arms for biasing. In this case, it is preferable that the elastic arm portion is formed in a shape along the inner peripheral surface of the cylindrical side wall portion of the inner plug member.

  According to this configuration, since the check valve is provided, the contents can be taken out satisfactorily while preventing air from entering the container. Moreover, since it can be set as a comparatively simple structure, it becomes possible to hold down manufacturing cost. In addition, the inner plug member has a bottomed cylindrical shape, and the check valve is provided with a plurality of elastic arm portions extending along the circumferential direction on the outer peripheral side. The elastic arm of the check valve is guided by the cylindrical side wall of the inner plug member by simply dropping the check valve having the elastic arm into the inside of the bottomed cylindrical inner plug member. After that, the inner plug member containing the check valve need only be attached to the cap body.

  Further, the inner plug member is formed in an inverted truncated cone shape in which the diameter between the cylindrical side wall portions increases as the cylindrical side wall portion moves away from the disc-shaped bottom portion, or the checker valve elastic arm portion Preferably, the inner plug member is formed in a shape that expands in the radial direction of the check valve toward the upper side along the cylindrical side wall portion. With this configuration, when the check valve is housed in the inner plug member, the elastic arm portion of the check valve is more easily guided.

  Further, the valve body of the check valve is fitted into the discharge hole of the inner plug member, and the peripheral wall of the discharge hole of the inner plug member extends in a bowl shape on the outer peripheral side of the valve main body. It is preferable that a hook-like portion that can be in close contact with the upper surface is formed, and according to this configuration, air can be well prevented from entering the inside of the container.

  In addition, an elastic arm portion is formed so as to extend in the circumferential direction and obliquely upward from the outer peripheral portion of the bowl-shaped portion, and a portion corresponding to the elastic arm portion in a plan view in the bowl-shaped portion is cut out, so that the contents in the container It is preferable that a passage combined gap through which an object can pass is formed. According to this configuration, the contents in the container can be taken out through the passage combined gap.

  In the present invention, the cap body includes a top surface portion from which the extraction tube portion forming the spout is protruded, and a cylindrical wall portion that hangs down downward from the top surface portion. The cylindrical side wall portion of the inner plug member is mounted on the inner periphery of the cylindrical wall portion in a state of being engaged in the circumferential direction.

  The cap body or the check valve is provided with a restricting portion for restricting the raising / lowering position of the check valve, or the valve body of the check valve protrudes into the container from the discharge hole of the inner plug member. Or an inverted truncated cone shape.

  According to the cap of the present invention, the inner stopper member is attached to the inside of the cap body attached to the mouth portion of the container, and the check valve is disposed in the space between the cap body and the inner stopper member. The stopper member is formed in a bottomed cylindrical shape, and the check valve has the valve body and a plurality of elastic arm portions extending along the outer peripheral portion of the valve body. By simply letting the check valve having a valve body and a plurality of elastic arm portions naturally fall into the bottomed cylindrical inner plug member, the elastic arm portion of the check valve is the cylindrical side wall of the inner plug member. It can be easily stored while being guided by the section. As a result, the assembly can be performed without strict alignment and the manufacturing efficiency at the time of assembly is improved. Moreover, since it can be set as a comparatively simple structure, it becomes possible to hold down manufacturing cost.

  Further, the elastic arm portion is formed in a shape along the inner peripheral surface of the cylindrical side wall portion of the inner plug member, or the inner plug member is formed between the cylindrical side wall portions as the cylindrical side wall portion moves away from the disc-shaped bottom portion. It is formed in a shape of a reverse truncated cone that increases the diameter of the check valve, or the elastic arm portion of the check valve is formed in a shape that expands in the radial direction of the check valve upward along the cylindrical side wall portion of the inner plug member. As a result, when the check valve is housed in the inner plug member, the elastic arm portion of the check valve is more easily guided and the manufacturing efficiency at the time of assembly can be further improved.

  In addition, the elastic arm portion is formed so as to extend from the outer peripheral portion of the bowl-shaped portion in the circumferential direction and obliquely upward, and a portion corresponding to the elastic arm portion in a plan view in the bowl-shaped portion is cut out so that the contents in the container are By forming a passage-use gap that can pass through, the contents in the container can be taken out through the passage-use gap. Therefore, since it is not necessary to separately form a passage combined gap in the check valve and the inner plug member, the check valve and the inner plug member are manufactured more compactly than in the case where the passage combined gap is separately formed. It becomes possible. In addition, when the elastic arm portion is deformed, it is possible to enter the passage-use gap, and it is possible to make the check valve thinner.

It is a longitudinal cross-sectional view which shows the cap which concerns on embodiment of this invention, the opening part of a container, etc., and shows the state which closed the lid | cover. It is the whole cap perspective view, and shows the state where the lid was opened. It is a perspective view of the inner cap member of the cap. It is a perspective view of the check valve of the cap. It is a front view of the check valve of the cap. It is a perspective view which shows the state which accommodates a non-return valve in the inner cap member of the cap. It is a longitudinal cross-sectional view which shows the state which attaches the inner stopper member in which the check valve was accommodated to the cap main body of the cap. It is a longitudinal cross-sectional view which shows the state which pours out the contents (liquid) from the container equipped with the cap. It is a principal part longitudinal cross-sectional view which shows the modification of the cap which concerns on embodiment of this invention. It is a principal part longitudinal cross-sectional view which shows the other modification of the cap which concerns on embodiment of this invention. It is a longitudinal cross-sectional view of the conventional cap. It is a perspective view of the on-off valve body of the conventional cap. It is a longitudinal cross-sectional view of another conventional cap. It is a top view of the check valve of the other conventional cap. It is a longitudinal cross-sectional view of the check valve of the other conventional cap.

Hereinafter, caps according to embodiments of the present invention will be described with reference to the drawings.
1 and 2, 1 is a flexible and deformable container, and 10 is a cap according to an embodiment of the present invention that is attached to the mouth portion 1 a of the container 1. In this embodiment, the case where the container 1 is a double container composed of an outer container 2 and an inner container 3 that are flexible and can be deformed is described. However, the present invention is not limited to this. It may be a deformable container. 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 outside air, and stops pressing (squeezing) the container 1 from the outside. In this case, air is configured to flow between the outer container 2 and the inner container 3 through the intake valve.

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

  The cap body 11 includes a pour cylinder portion 15 in which a pour port 12 is formed, a top surface portion 16 having a substantially circular top view in which the pour tube portion 15 protrudes upward, and the top surface portion 16. A cylindrical wall portion 17 that hangs down from the outer periphery in a cylindrical shape, an upper wall portion 18 that extends from the outer periphery of the cylindrical wall portion 17 to the outer peripheral side (radially outward), the cylindrical wall portion 17 and the upper wall portion An inner peripheral cylindrical portion 19 that extends downward in a cylindrical shape from a connection portion with the inner peripheral portion 18 and is in close contact with the inner peripheral surface of the mouth portion 1 a of the container 1, and a cylindrical shape downward from the outer periphery of the upper wall portion 18. An outer peripheral cylindrical portion 20 that extends and is intimately attached to the outer peripheral surface of the mouth portion 1a of the container 1, and a lower edge of the lid 13 that extends upward from an outer peripheral portion of the upper wall portion 18 in a cylindrical shape (annular shape) A protruding piece portion 21 that can be brought into close contact with the inner peripheral surface of the portion is integrally formed. A locking claw portion 17 a for locking the inner plug member 30 is also integrally formed on the inner peripheral surface of the cylindrical wall portion 17 of the cap body 11. The lid 13 has a protrusion 13 a that can be inserted into the spout 12 in the spout cylinder 15 when the cover 13 is closed and can close the spout 12. An outer peripheral protrusion 13b and the like that can be contacted from each other are also integrally formed.

  The inner plug member 30 is attached to the inside of the cap body 11 (discharge passage leading to the mouth 1a of the container 1). As shown in FIGS. 1 and 3, the inner plug member 30 extends from the outer periphery of the disc-shaped bottom portion 32 to the upper side in a tubular shape. It is formed in a bottomed cylindrical shape having a cylindrical side wall portion 33, and is engaged with a locking claw portion 17 a of the inner plug member 30 in the circumferential direction on the outer periphery of the upper edge portion of the cylindrical side wall portion 33. A locking claw 33a for locking the member 30 is formed.

  As shown in FIGS. 1, 4, and 5, the check valve 40 includes a circular valve body 41 that can open and close the discharge hole 31 of the inner plug member 30, and a circumferential direction from the outer peripheral portion of the valve body 41. However, it has a plurality of (four in this embodiment) elastic arm portions 45 that extend obliquely upward and urge the valve body 41 in the direction of tightly contacting the peripheral wall portion of the discharge hole 31 of the inner plug member 30. And are integrally formed of resin or the like. More specifically, the valve body 41 of the check valve 40 includes a valve body main body 41a that fits into the discharge hole 31 of the inner plug member 30, and an inner plug member that extends in a bowl shape on the outer peripheral side of the valve main body 41a. A hook-like portion 41b that can be brought into close contact with the upper surface of the peripheral wall portion of the 30 discharge holes 31 is formed. Further, the flange-like portion 41b is further extended outward by a predetermined angle in plan view, and an outwardly extending portion 42 is integrally formed. After extending upward from the outwardly extending portion 42, obliquely upward along the circumferential direction. Elastic arm portions 45 are formed to extend.

  As shown in FIG. 1, the check valve 40 is disposed in a state of being accommodated in a space between the cap body 11 and the inner plug member 30. And the elastic arm part 45 is formed in the shape in alignment with the internal peripheral surface of the cylindrical side wall part 33 of the inner plug member 30 so that it may show simply in FIG. Further, in this embodiment, the distal end portion of the elastic arm portion 45 is extended horizontally and is brought into contact with the lower surface of the top surface portion 16 of the cap body 11 in an elastically deformed state. 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 (in this embodiment, downward). Further, as shown in FIG. 4 and the like, a passage-use gap 46 through which the contents in the container 1 can be passed by cutting out a portion corresponding to the elastic arm portion 45 in a plan view of the flange-like portion 41b of the check valve 40. Is formed.

  Further, in this embodiment, as shown in FIG. 1 and the like, the diameter between the cylindrical side wall portions 33 increases as the cylindrical side wall portion 33 of the inner plug member 30 moves away from the disk-shaped bottom portion 32 (that is, toward the upper side). It is formed in the shape of an inverted truncated cone. Correspondingly, the elastic arm portion 45 of the check valve 40 is formed in a shape that expands in the radial direction of the check valve 40 upward along the cylindrical side wall portion 33 of the inner plug member 30. .

  Further, the discharge hole 31 of the inner plug member 30 is formed in a truncated cone shape whose diameter is reduced toward the lower side communicating with the inside of the container 1, and the valve body main body 41 a of the check valve 40 is also correspondingly lower. It is formed in the shape of a truncated cone having a smaller diameter toward the side.

  At the time of manufacturing and assembling the cap, as shown in FIG. 6, first, the check valve 40 is naturally dropped into the inside of the bottomed cylindrical inner plug member 30. Thereby, the elastic arm part 45 of the check valve 40 can be easily accommodated while being guided by the cylindrical side wall part 33 of the inner plug member 30. Then, the inner plug member 30 in which the check valve 40 is accommodated is simply pushed upward into the cap body 11 (pressed upward from the inner peripheral cylindrical portion 19) to lock the inner plug member 30. The claw portion 33a engages with the locking claw portion 17a of the cylindrical wall portion 17 of the cap body 11, and the inner plug member 30 and the check valve 40 can be easily attached.

  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. 8, the urging force of the elastic arm portion 45 is applied by the contents receiving the pressure 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 while resisting the pressure, and passes through the gap between the valve body 41 and the disc-shaped bottom 32 or the passage-use gap 46, The liquid of the contents is poured out from the outlet 12. When the container 1 is stopped from being pressed (squeezed) from the outside, the valve body 41 of the check valve 40 is pressed by the urging force of the elastic arm portion 45 and the peripheral wall portion of the discharge hole 31 of the inner plug member 30 and the surrounding upper surface thereof. The discharge hole 31 is closed in close contact with the portion, and is sealed in a state where no liquid leaks. At this time, the spout 12 of the cap body 11 in which the check valve 40 is accommodated (inside the extraction tube portion 15), the top surface portion 16 in which the check valve 40 is accommodated, the inner plug member 30, and the like. The contents accumulated during the period are returned to the inside of the container 1 by the negative pressure in the container 1. As described above, the cap 10 allows the contents to be put out satisfactorily while preventing air from entering the container 1. In addition, since the configuration is relatively simple, it is possible to reduce manufacturing costs.

  Moreover, according to the said structure, since the inside stopper member 30 is a bottomed cylinder shape and the non-return valve 40 is provided with the some elastic arm part 45 extended along the circumferential direction on the outer peripheral side, the said cap 10 is provided. At the time of manufacturing and assembly, the check valve 40 having the valve body 41 and a plurality of elastic arm portions 45 is simply dropped into the bottomed cylindrical inner plug member 30 and the elasticity of the check valve 40 can be obtained. The arm portion 45 can be easily accommodated while being guided by the cylindrical side wall portion 33 of the inner plug member 30, and thereafter, the inner plug member 30 in which the check valve 40 is accommodated only needs to be attached to the cap body 11. . As a result, the assembly can be performed without strict alignment and the manufacturing efficiency at the time of assembly is improved.

  Further, the inner plug member 30 is formed in an inverted truncated cone shape in which the diameter between the cylindrical side wall portions 33 increases as the cylindrical side wall portion 33 moves away from the disc-shaped bottom portion 32, or the elastic arm of the check valve 40. The check valve 40 is accommodated in the inner plug member 30 by forming the portion 45 into a shape that expands in the radial direction of the check valve 40 upward along the cylindrical side wall portion 33 of the inner plug member 30. At this time, the elastic arm portion 45 of the check valve 40 can be more easily guided, and the manufacturing efficiency at the time of assembly can be further improved.

  In addition, the elastic arm portion 45 is formed so as to extend in the circumferential direction and obliquely upward from the outer peripheral portion of the bowl-shaped portion 41b, and a portion corresponding to the elastic arm portion 45 in the plan view of the bowl-shaped portion 41b is cut out, and the container 1 By forming the passage-use gap 46 through which the contents inside can pass, the contents in the container 1 can be satisfactorily taken out through the passage-use gap 46. Accordingly, it is not necessary to separately form a passage-use gap in the check valve or the inner plug member (for example, it is not necessary to provide a passage groove portion as in Patent Document 1), and thus a passage-use gap is formed separately. Compared to the case, the check valve 40 and the inner plug member 30 can be manufactured in a compact manner. Moreover, when the elastic arm part 45 deform | transforms, it becomes possible to enter the channel | path clearance gap 46, and it becomes possible to make the check valve 40 thinner. That is, in Patent Document 1, the holding cylinder part 66c does not have a gap or the like cut out in the upper surface part, and the elastic part 66f extends obliquely upward from the upper surface part of the holding cylinder part 66c along the circumferential direction. Since the elastic portion 66f can be deformed in the same manner, the elastic portion 66f has to be formed long, and the on-off valve body 66 (check valve) correspondingly. ) May increase in thickness (enlarge), but according to the present configuration, this does not occur.

  Further, in the check valve 40, the portion corresponding to the elastic arm portion 45 in the plan view of the bowl-shaped portion 41 b is notched to form a passage combined gap 46 through which the contents in the container 1 can pass, thereby When the check valve 40 is manufactured, there is an advantage that the check valve 40 can be manufactured at a relatively low cost by using a mold having a relatively simple structure of the upper mold and the lower mold. That is, unlike the patent document 1, the holding cylinder part 66c does not have a gap or the like cut out on the upper surface part, and the elastic part 66f extends obliquely upward along the circumferential direction from the upper surface part of the holding cylinder part 66c. Since the open / close valve body 66 (check valve) cannot be manufactured by a mold having a relatively simple structure between the upper mold and the lower mold, In addition to the mold and the lower mold, a mold that moves out to the left and right is also required, which may increase the manufacturing cost. However, according to the present configuration, this is not the case.

  Moreover, according to the said structure, since the some elastic arm part 45 provided in the non-return valve 40 is a shape extended diagonally upwards along the circumferential direction from the outer peripheral part of the valve body 41, the container 1 is outside. When the valve body 41 moves upward (to the top surface portion 16 side of the cap body 11), the valve body 41 moves while rotating in the circumferential direction. In this case, since the check valve 40 is in contact with the cap body 11 only at the upper end portion of the elastic arm 45 when the valve body 41 is pushed up with respect to the cap body 11, the check valve 40 as a whole. May rotate easily, and the check valve 40 as a whole may rotate. Thereby, it is possible to satisfactorily prevent the valve body 41 of the check valve 40 from coming into contact with the peripheral portion of the discharge port 31 in the inner plug member 30 evenly and leaking over a long period of time.

  That is, the on-off valve body 66 disclosed in Patent Document 1 also has an elastic portion 66f that extends obliquely upward along the circumferential direction. As shown in FIG. Since the support shaft portion 66b is supported by the support arm portion 67 of the sealing plug 64 and is in contact therewith, the on-off valve body 66 is difficult to rotate. On the other hand, in this cap 10, since the check valve 40 has a structure that is easy to rotate, it is possible to satisfactorily prevent liquid leakage over a long period of time and maintain good reliability over a long period of time. .

  In the present embodiment, as shown in FIG. 4, the elastic arm portion 45 of the check valve 40 extends upward from the outer extension portion 42 and then extends obliquely upward along the circumferential direction. Since 45 is formed, the portion extending upward from the outer extension portion 42 is easily stretched in the vertical direction, and the urging force of the valve body 41 can be increased. However, the configuration is not limited to this, and the elastic arm portion 45 may be formed so as to extend obliquely upward along the circumferential direction without extending upward (standing) from the outer extension portion 42.

  Further, as shown in FIG. 9, the cap body 11 extends downward from the top surface portion 16 and the like, and when the check valve 40 is lifted, it comes into contact with the valve body 41 and the like of the check valve 40. You may form the control part 51 which controls 40 raising / lowering positions. The restricting portion 51 is provided on the check valve 40 instead of being provided on the cap body 11 so that when the check valve 40 is raised, the restricting portion 51 is in contact with the top surface portion 16 of the cap body 11 to be restricted. Also good.

  As shown in FIG. 10, the valve body 41 a of the valve body 41 of the check valve 40 may be formed in an inverted truncated cone shape that protrudes into the container 1 from the discharge hole 31 of the inner plug member 30. . In addition, as shown in FIG. 10, it may be formed in a substantially inverted truncated cone shape through a plurality of stepped portions, but it may be formed so as to become smaller in an oblique direction as it is lower. According to such a configuration, since the area where the valve element 41 of the check valve 40 is exposed inside the container 1 increases, in some cases, it may be possible to reduce the force when pressing (squeezing) the container 1. It becomes possible.

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

  In the above embodiment, the case where the cap 10 is plugged into and attached to the container 1 is illustrated. However, the present invention is not limited to this, and a so-called screw-type cap that is screwed into the container is attached. Is also applicable.

DESCRIPTION OF SYMBOLS 1 Container 10 Cap 11 Cap main body 12 Spout 13 Cover 16 Top surface part 17 Cylindrical wall part 30 Inner plug member 31 Discharge hole 32 Disc-shaped bottom part 33 Cylindrical side wall part 40 Check valve 41 Valve body 45 Elastic arm part 46 Passage Double-use gap 51 Restriction section

Claims (9)

A cap attached to the mouth of a flexible container,
A cap body mounted on the mouth of the container; a spout formed in the cap body; and a lid for opening and closing the spout;
An inner stopper member is attached to the inside of the cap body, and the inner stopper member is formed with a discharge hole leading to the inside of the container,
A check valve having a circular valve body capable of opening and closing the discharge hole of the inner plug member is housed in a space between the cap body and the inner plug member;
The inner plug member is formed in a bottomed cylindrical shape having a disk-shaped bottom part provided with discharge holes and a cylindrical side wall part extending upward from the outer periphery of the disk-shaped bottom part,
The check valve includes the valve body and a plurality of elastic members that extend obliquely upward along the circumferential direction from the outer peripheral portion of the valve body and bias the valve body in a direction in close contact with the peripheral wall portion of the discharge hole of the inner plug member. A cap having an arm portion.   The cap according to claim 1, wherein the elastic arm portion is formed in a shape along an inner peripheral surface of the cylindrical side wall portion of the inner plug member.   The cap according to claim 1 or 2, wherein the cylindrical side wall portion of the inner plug member is formed in an inverted truncated cone shape in which the diameter between the cylindrical side wall portions increases as the distance from the disc-shaped bottom portion increases. .   The elastic arm portion of the check valve is formed in a shape that expands in a radial direction of the check valve upward along the cylindrical side wall portion of the inner plug member. cap. The valve body of the check valve is fitted into the discharge hole of the inner plug member, and the valve body extends from the outer periphery of the valve main body to the upper surface of the peripheral wall of the discharge hole of the inner plug member. The cap according to any one of claims 1 to 4, wherein an intimate hook-shaped portion is formed.   An elastic arm portion is formed so as to extend in the circumferential direction and obliquely upward from the outer peripheral portion of the bowl-shaped portion, and a portion corresponding to the elastic arm portion in a plan view in the bowl-like portion is cut out, so that the contents in the container are The cap according to claim 5, wherein a passage-use gap that can pass is formed. The cap body has a top surface portion from which a dispensing cylinder portion that forms the spout is protruded, and a cylindrical wall portion that hangs downward from the top surface portion in a cylindrical shape,
The cylindrical wall portion of the inner plug member is attached to the inner periphery of the cylindrical wall portion in a state of being engaged in the circumferential direction. Cap.   The cap according to any one of claims 1 to 7, wherein a restriction portion for restricting a lift position of the check valve is formed in the cap body or the check valve.   The cap according to any one of claims 1 to 8, wherein the valve body of the check valve has a reverse truncated cone shape protruding into the container from the discharge hole of the inner plug member. .

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