JP2014221643A - Cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure sealability of a cap when unused, and improve the sealability with a lid closed after the cap is opened.SOLUTION: An inner plug includes a side wall part which fits to a container mouth part, a top plate part on an inner side of an upper end part of the side wall part, a pouring wall part vertically extending to the top plate part, a pouring port part on an inner side of the pouring wall part, a thin part which can be broken on an inner side of the pouring port part, and a seal plate part which closes the pouring port part on an inner side of the thin part. A lid includes a top plate part joined to the seal plate part, and a side wall part hanging from an outer peripheral edge part of the top plate part. In this cap, the seal plate part includes a peripheral wall part which has a mountain shape and heads vertically from an inner circumference of the thin part, and a top part which closes an upper end of the peripheral wall part and is joined to the lid top plate part. A thickness of the thin part is reduced at an inner circumference part as compared with an outer circumference part, and a skirt part, which has a deformable thickness and spreads downward, is formed on a lower end part of the peripheral wall part. An outer peripheral edge of the skirt part is in close contact with a periphery of a lower side of the thin part in an unopened state, and is in close contact on the thin part when the lid is closed after the cap is opened.

Description

  The present invention relates to a cap attached to a container. More specifically, it includes an inner stopper attached to the container mouth portion and a lid partly joined to the inner stopper, and the outlet portion of the inner stopper is a part of the lid through the thin portion when not opened. It is related with the cap which opens a spout part by damaging a thin part by opening operation of a lid | cover.

  The container is filled with various contents such as seasonings and dressings, and a cap is attached to the container. An example of such a cap is a hinge cap. The hinge cap is provided with a spout for pouring the contents of the container into the inner cap, and the spout is closed with a pull ring when unopened, and the user tears off the pull ring after opening the lid. The thing which opens a spout part by this is widely known.

  However, in the above-described general hinge cap, two operations, that is, an operation of opening the lid and an operation of peeling off the pull ring are necessary at the time of use. Therefore, a special hinge cap that does not use a pull ring has been developed in order to manage these operations once. As an example, there is one that automatically opens a spout portion that is blocked when unopened by an initial opening operation that is an opening operation (see Patent Document 1).

  As a specific configuration of Patent Document 1, the hinge cap includes a cap main body fixed to the container mouth portion and an upper lid connected to the cap main body by a hinge. A top opening portion of the cap body is provided with a planned opening portion to be formed by the first opening operation. The spout opening planned portion is closed by a thin portion and a seal plate sequentially provided on the inner peripheral side until the first opening operation is performed. In addition, the outer peripheral edge portion of the seal plate in the vicinity of the thin wall portion is welded to the lower end of the tearing tool that hangs down from the top plate portion of the upper lid.

  The hinge cap having such a configuration is attached to the container after the contents are filled and commercialized. Then, by performing the first lid opening operation on the hinge cap, the thin wall portion is torn to form the dispensing opening, so that the upper lid opens together with the seal plate that has blocked the dispensing opening planned portion until then. It has become.

JP 2005-289389 A

  By the way, after the lid opening operation is performed, the thin portion is torn in an annular shape, so that a gap is formed in the torn portion even when the upper lid is closed. Therefore, the dispensing opening is not completely blocked, and the sealing property is low.

  The present invention was created in view of the above circumstances, and an object thereof is to improve the sealing performance in a state where the lid is closed after opening.

  The present invention includes a cylindrical inner plug side wall portion that fits outside the container mouth portion, an annular inner plug top plate portion that projects inwardly from the inner periphery of the upper end portion of the inner plug side wall portion, and upper and lower portions of the inner plug top plate portion. A cylindrical pouring wall portion extending to the inside, an annular pouring portion provided inside the pouring wall portion, an annular thin portion provided on the inner periphery of the pouring portion and damaged by an opening operation, and a thin portion An inner plug provided with a seal plate portion that closes the inside of the spout portion on the inner periphery of the lid, a lid top plate portion that is joined to the seal plate portion after molding, and a cylinder that hangs down from the outer peripheral edge portion of the lid top plate portion And a synthetic resin cap provided with a lid having a lid side wall and a lid that can be opened and closed with respect to the inner plug.

  In the cap of the present invention, the seal plate portion has a chevron shape, and has an annular peripheral wall portion that goes up and down from the inner periphery of the thin wall portion, and a top portion that closes the upper end of the peripheral wall portion and is joined to the lid top plate portion. Shall be provided. The thickness of the thin portion is such that the inner peripheral portion is thinner than the outer peripheral portion, has a deformable thickness, and has an annular skirt that expands toward the bottom at the lower end of the peripheral wall portion. In addition, the outer peripheral edge of the skirt is positioned in the vicinity of the lower side of the thin portion in the unopened state, and is deformed and closely contacts the thin portion in the state where the lid is closed after opening.

  Further, the thickness of the hem portion may be deformable, and it is easy to closely contact the thin wall portion with the lid closed after opening and to facilitate injection molding with a synthetic resin (to facilitate mold opening). It is desirable to do as follows. That is, the thickness of the skirt is made thinner toward the outer peripheral edge.

  In order to further improve the sealing performance of the cap, it is desirable to do the following. That is, the lid is provided with a cylindrical sealing wall portion that hangs down from the lid top plate portion and contacts the inner surface of the extraction wall portion.

  The cap may be either for a liquid container or a solid container, but it is for a liquid container that the effect of preventing the contents from spilling out can be realized more.

  According to the present invention, the inner peripheral portion of the thin wall portion is damaged by opening, and the outer peripheral portion of the thin wall portion is connected to the spout portion. Therefore, the contents can be discharged from the inside of the outer peripheral portion of the thin portion. Moreover, since the outer peripheral edge of the hem portion is located near the lower side of the outer peripheral portion of the thin portion in the unopened state, the outer peripheral edge of the hem portion contacts the upper side of the outer peripheral portion of the thin portion in the state immediately before closing the lid after opening. . Since the skirt has a deformable wall thickness, when the lid is closed from the state immediately before the lid is closed, the skirt is deformed and closely overlaps the thin wall portion, thereby improving the sealing performance of the cap.

  Further, if the thickness of the skirt portion becomes thinner toward the outer peripheral edge, the skirt portion is easily deformed. Therefore, it becomes easy to come into close contact with the thin wall portion with the lid closed after opening, and it is easy to release from the mold when opening the inner plug by injection molding with a synthetic resin.

  Furthermore, if the lid has a cylindrical sealing wall part that hangs down from the lid top plate part, the sealing wall increases with the sealing wall part coming into contact with the inner surface of the pouring wall part. Will improve.

  If the cap is for a liquid container, it is useful that the liquid as the contents does not spill outside when the lid is closed after opening.

(A) and (B) are a sectional view and a perspective view showing an unsealed state of the hinge cap according to the first embodiment. It is sectional drawing which shows the hinge cap of 1st Embodiment of an unopened state. It is sectional drawing which shows the hinge cap of 1st Embodiment of the state which closed the lid after opening. (A), (B), and (C) are a plan view, a front view, and a right side view showing the hinge cap of the first embodiment immediately after molding. FIGS. 4A and 4B are cross-sectional views taken along lines AA and BB in FIG. (A) and (B) are sectional views showing a state immediately after molding and an unopened state in the second embodiment of the hinge cap. (C) (D) Drawings are sectional views showing an opened state and a lid closed state of the hinge cap of the second embodiment.

  The hinge cap 10 of 1st Embodiment as a cap of this invention is shown by FIGS. 1-5. FIG. 1 shows an opened state in which the lid 12 of the hinge cap 10 is opened for the first time, FIG. 2 shows an unopened state in which the lid 12 has not been opened, FIG. 3 shows a state in which the lid 12 is closed after opening, FIG. FIG. 5 shows each hinge cap 10 immediately after resin molding. The hinge cap 10 according to the first embodiment includes an inner stopper 11 attached to the container mouth, a lid 12 that can be opened and closed with respect to the inner stopper 11, and a hinge 13 that connects them. Hereinafter, the unopened state shown in FIG. 2 will be described in detail as a basic aspect for each of these components.

  The inner plug 11 is provided with a cylindrical outer wall portion 21, a side wall portion 22, and a dispensing wall portion 23 that are concentrically spaced from the outer peripheral side toward the inner peripheral side. The upper end portion of the outer wall portion 21 and the upper end portion of the side wall portion 22 are connected by a joint portion 24, and the upper end portion of the side wall portion 22 and the middle height portion of the extraction wall portion 23 are connected by an annular top plate portion 25. Has been. A cylindrical locking wall portion 26 extends upward from the outer peripheral edge portion of the top plate portion 25, and an annular spout portion 27 protrudes inward from the inside of the spout wall portion 23. A thin portion 28 that is damaged when opened is provided over the entire inner periphery of the spout portion 27, and a seal plate portion 29 that closes the spout portion 27 in an unopened state is provided inside the thin portion 28. Yes. The configuration of the inner plug 11 having such an outline will be further described in detail.

  The outer wall portion 21 extends below the side wall portion 22 and is thinner than the side wall portion 22. Further, the joint portion 24 is continuous between the outer wall portion 21 and the side wall portion 22 by a circular arc portion 24a for a partial region of the entire circumference in the circumferential direction, and a plurality of bridging portions 24b for other regions. Are continuously laid out radially at intervals in the circumferential direction. When the used hinge cap 10 is removed from the container and discarded, if the lid 12 is pulled upward, the bridging portion 24b is broken, and the outer wall portion 21 of the damaged outer portion is lifted, and the inner plug 11 Becomes easy to come off from the container mouth.

  The side wall portion 22 has a wedge-shaped retaining portion 22a projecting inwardly on the inner peripheral surface thereof, and is fitted to the outer periphery of the container mouth portion by the retaining portion 22a. Further, the side wall portion 22 is provided with slits 22b at equal intervals over the entire circumference in the circumferential direction. Each slit 22b reaches from the upper side to the lower end of the side wall part 22 above the retaining part 22a, and penetrates in the thickness direction of the side wall part 22. By these slits 22b, the lower portion of the side wall portion 22 is easily opened to the outer peripheral side, and is easily attached to and detached from the container mouth portion.

  The top plate portion 25 is a portion that covers the upper end surface of the container mouth portion. The locking wall portion 26 is a portion that fits to the lid 12 so as to be openable and closable, and a locking projection 26a protrudes outward from the upper portion thereof. A locked protrusion 32a that fits detachably on the locking protrusion 26a protrudes inward from the lower end of the side wall 32 of the lid 12 described later.

  The pouring wall portion 23 extends vertically from the inside of the top plate portion 25, and includes an upper upper pouring wall portion 23a and a lower lower pouring wall portion 23b. Of these, the lower pouring wall portion 23b is fitted into the inner peripheral surface of the container mouth portion. On the other hand, the upper pouring wall portion 23a has a cylindrical shape as described above. More specifically, the upper pouring wall portion 23a is formed such that the side close to the hinge 13 is low and the side opposite to the hinge 13 is high. Then, it has an arc shape.

  In the example shown in the drawing, the outline of the inner periphery of the spout portion 27 has an elongated rhombus shape whose corners are rounded and chamfered. A thin portion 28 is provided in an annular shape over the entire inner periphery of the spout portion 27.

  The thin-walled portion 28 has a shape that is thinner than both portions connected to the inner peripheral side and the outer peripheral side (respective connection portions of the spout portion 27 and the peripheral wall portion main body 29c of the seal plate portion 29). It can be damaged when opened. More specifically, the annular thin-walled portion 28 is gradually thinned from the outer peripheral side to the inner peripheral side, and as a whole, the inner peripheral portion (portion close to the seal plate portion 29) is changed to the outer peripheral portion (outlet port). It is formed thinner than the portion 27). Therefore, the inner peripheral portion is more easily damaged than the outer peripheral portion, and the thin portion 28 is designed so as to be damaged within the radial width range (predicted damage range) of the inner peripheral portion. When the thin portion 28 is broken, a broken line 28L is formed in an annular shape. In the example shown in the drawing, the thin portion 28 is not partially separated but is entirely connected to the spout portion 27. In this case, the break line 28L is the inner peripheral edge of the thin portion 28 before breakage (before breakage). Of the thin wall portion 28 and the seal plate portion 29). However, the position of the broken line 28L is not limited to the boundary position and may be on the outer peripheral side of the boundary position (not shown). In this case, the thin-walled portion 28 is divided into two, Thus, the inner portion is connected to the seal plate portion 29, and the outer portion is connected to the spout portion 27 with respect to the broken line 28L.

  The sealing plate portion 29 has a mountain shape, and a flat top portion 29a at the center thereof is higher than the inner plug top plate portion 25 and has a similar shape in which the spout 27 is reduced, and the outer peripheral edge portion of the top portion 29a. A cylindrical peripheral wall portion 29b is provided to hang down.

  The peripheral wall portion 29b includes an annular peripheral wall portion main body 29c that extends downward from the entire outer periphery of the top portion 29a, and an annular hem portion 29d that extends downward from the entire outer periphery of the lower end portion of the peripheral wall portion main body 29c. Both the peripheral wall main body 29c and the skirt 29d are inclined in a divergent shape toward the lower side. As for the relationship of these inclinations, the hem 29d is gentler than the peripheral wall main body 29c when the horizontal is used as a reference (the shape further widens toward the end). Further, the thin wall portion 28 is connected to the upper end of the lower end portion of the peripheral wall portion main body 29c above the skirt portion 29d, and therefore the peripheral wall portion 29b (the peripheral wall portion main body 29c) is directed upward and downward from the inner peripheral edge of the thin wall portion 28. ing. Further, the skirt 29d is inclined slightly from the lower side than the joining portion of the thin wall portion 28 in the peripheral wall main body 29c while being directed downward. Accordingly, the skirt portion 29d is positioned below the thin portion 28 in an unopened state. Specifically, the bottom portion 29d is formed in the vicinity of the lower side of the thin portion 28 (more specifically, the lower side in more detail) so as to gradually move away from the inner peripheral side toward the outer peripheral side.

  Further, the hem 29d has a deformable thickness that decreases in thickness toward the outer peripheral edge that is the tip thereof, and has an annular shape. The entire outer peripheral edge of the skirt 29d is formed so as to reach the outer periphery of the thin portion 28 (outside in the radial direction from the expected damage range). Therefore, the entire circumference of the outer peripheral edge of the skirt 29d overlaps the damaged thin-walled portion 28 (portion connected to the spout portion 27) when the lid 12 is closed after opening. The overlapped thin wall portion 28 and skirt portion 29d are slightly deformed due to the elasticity of the synthetic resin and are brought into close contact with each other.

  Next, the lid 12 will be described in detail. The lid 12 includes a circular top plate portion 31 and a cylindrical side wall portion 32 depending from the outer peripheral edge of the top plate portion 31 as main components.

  The lid side wall portion 32 is disposed such that the lower end surface thereof overlaps the inner plug outer wall portion 21. At the lower end of the lid side wall portion 32, a flange portion 32b is provided so as to protrude outwardly on the side opposite to the hinge 13, and when viewed in plan, the flange portion 32b has an arc shape.

  The lid top plate portion 31 is provided with a circular vessel-shaped depressed portion 31a at the center (a portion facing the seal plate portion 29). The hinge cap 10 is an integrally molded product of plastic (more specifically, polypropylene) produced by injection molding or the like. When the lid 12 is closed after molding, the bottom 31b of the depressed portion 31a is the top of the seal plate portion. 29a is provided in contact with 29a. Moreover, the peripheral wall part 31c which has fallen toward the bottom part 31b among the depression parts 31a inclines in the form which becomes a bottom constriction as it goes below. In the closed state after opening, the cylindrical sealing wall portion 33 hangs concentrically from the depressed portion peripheral wall portion 31c, and the lower end of the sealing wall portion 33 strongly contacts the inner surface of the extraction wall portion 23. The inside of the extraction wall portion 23 is sealed. Therefore, a sealed portion formed by the sealed wall portion 33 and the extraction wall portion 23 and a sealed portion formed by the thin portion 28 and the skirt portion 29d are formed.

  The bottom 31b of the depression 31a and the seal plate top 29a are joined together by welding (ultrasonic welding, high frequency welding, etc.) or adhesion after plastic molding of the hinge cap 10. In the case of ultrasonic welding or the like, ultrasonic welding is performed while an ultrasonic welding vibrator is applied to one of the upper surface of the depressed portion 31a and the lower surface of the seal plate portion 29 and a jig is applied to the other. Then, the bottom part 31b of the depressed part 31a and the seal plate part top part 29a are melted and joined and integrated.

  Finally, the hinge 13 will be described in detail. The hinge 13 is composed of a plate-like object 13a that can be refracted at an intermediate portion of the length, and a thin strip-like object 13b that can be bent. Each of the hinges 13 is connected to the inner plug 11 and the other end is connected to the lid 12. Is provided. More specifically, the plate-like object 13a is arranged in the center, and the band-like objects 13b are arranged on both sides of the plate-like object 13a with an interval between them. It is provided continuously at the lower end of the side wall portion 32. With such a configuration, the hinge 13 connects the lid 12 to the inner plug 11 so that the lid 12 can be opened and closed.

  The form immediately after molding of the hinge cap 10 described above is shown in FIGS. This form is a shape without an undercut. Therefore, the mold can be opened simply by moving the movable mold linearly with respect to the fixed mold. The hinge cap 10 has several portions that protrude in the direction intersecting the mold opening direction, but the amount of protrusion is short. For example, the skirt portion 29d becomes thinner toward the tip. Therefore, the mold can be opened by utilizing the elastic deformation of the synthetic resin. Since the slit 22b is provided on the inner plug side wall portion 22 as described above, the mold can be opened by utilizing the elastic deformation of the synthetic resin even if the retaining portion 22a of the inner plug side wall portion 22 is provided. . Similarly, the cover depression 31a has no protruding portion.

The hinge cap 10 described above is manufactured in the following manner, opened, and closed again.
(1) In a state immediately after plastic molding of the hinge cap 10 (a state in which the hinge cap 10 is accommodated in a mold), as shown in FIGS. 4 and 5, the lid 12 is opened and arranged next to the inner plug 11. At this time, the inner plug seal plate portion 29 and the lid recess portion 31a both have a wide-angled shape with no undercut.
(2) When the lid 12 is closed with respect to the hinge cap 10 removed from the mold, the bottom 31b of the lid recess 31a is in surface contact with the top 29a of the inner plug seal plate 29 as shown in FIG.
(3) Thereafter, the bottom 31b of the lid recess 31a and the top 29a of the inner plug seal plate 29 are joined by ultrasonic welding or the like.
(4) The hinge cap 10 thus completed is fitted into the container opening filled with the contents.
(5) When the side wall portion flange portion 32b of the lid 12 is pushed up for opening, the annular thin portion 28 is torn around the entire circumference while the lid 12 is opened with the hinge 13 as a fulcrum as shown in FIG. Damaged. Further, the skirt 29d of the seal plate 29 gets over the inside of the damaged thin-walled portion 28, and the inside of the spout portion 27 is opened so that the contents can be discharged. Then, the seal plate portion 29 remains attached to the lid top plate portion 31.
(6) When the lid 12 is to be closed after opening, the skirt 29d comes into contact with the outer peripheral portion of the thin-walled portion 28 in a state immediately before closing. And when it will be in the closed state from the state immediately before closing, the skirt part 29d and the outer peripheral part of the thin part 28 of the lower side will mutually deform | transform and closely_contact | adhere. Further, the lower end of the sealing wall portion 33 is in close contact with the inner surface of the extraction wall portion 23. Because of this close contact, the hinge cap 10 is highly sealed. The contents are not limited, but liquid (including those with a low viscosity such as dressing and those with a high viscosity such as ketchup) as compared with solids (granules, powders, etc.) is hermetically sealed. You can feel the height of the more.

  6 and 7 show a hinge cap 10 according to a second embodiment of the present invention. The difference from the first embodiment is that the lid top plate portion 31 has a flat shape without the recessed portion 31a, and the inner plug seal plate portion 29 has a high chevron shape.

  The present invention is not limited to the above embodiment. For example, the cap of the present invention is not limited to a hinge cap, and may be another cap such as a screw cap with a screw. In the case of a screw cap, after molding, the inner plug 11 and the lid 12 are connected so as to be openable and closable by screws formed on the outer peripheral surface or inner peripheral surface of each other, and then the inner plug 11 is sealed. The lid top plate portion 31 is welded to the plate portion 29 and joined.

  Further, as means for joining the lid top plate portion 31 and the inner plug seal plate portion 29, welding by ultrasonic waves or high frequency is used, but not limited thereto, adhesion may be used. Furthermore, the shape of the spout 27 is not limited to a rhombus, and may be other shapes. In the state where the lid 12 is closed after opening, it is desirable that the entire circumference of the tip of the skirt 29d overlaps the damaged thin portion 28, but a part of the entire circumference of the tip of the skirt 29d overlaps. Even in the case of this configuration, the sealing performance is improved as compared with a configuration in which they do not overlap at all. The lid 12 is not limited to the structure having the cylindrical sealing wall portion 33 that hangs down from the lid top plate portion 31, and may have a structure without the sealing wall portion 33.

10 Hinge Cap 11 Inner Plug 12 Lid 13 Hinge 13a Plate 13b Strip 21 Outer Wall 22 Side Wall 22a Detachment 22b Slit 23 Pouring Wall 23a Upper Pouring Wall 23b Lower Pouring Wall 24 Joint 24a Arc portion 24b Bridge portion 25 Top plate portion 26 Locking wall portion 26a Locking projection portion 27 Outlet portion 28 Thin wall portion 28L Break line 29 Seal plate portion 29a Top portion 29b Perimeter wall portion 29c Perimeter wall portion main body 29d Bottom portion 31 Top plate portion 31a Depressed part 31b Bottom part 31c Peripheral wall part 32 Side wall part 32a Locked protrusion part 32b Gutter part 33 Sealed wall part

Claims (4)

A cylindrical inner plug side wall that fits outside the container mouth, an annular inner plug top plate that protrudes inwardly from the inner periphery of the upper end of the inner plug side wall, and a cylinder that extends vertically above and below the inner plug top plate In the shape of the pouring wall portion, the annular pouring port portion provided inside the pouring wall portion, the annular thin wall portion provided on the inner periphery of the pouring port portion and damaged by the opening operation, and the inner periphery of the thin wall portion An inner stopper provided with a seal plate portion that closes the inside of the spout portion,
A lid provided with a lid top plate portion joined to the seal plate portion after molding and a cylindrical lid side wall portion depending from the outer peripheral edge portion of the lid top plate portion, and a lid that can be opened and closed with respect to the inner plug In a synthetic resin cap comprising
The seal plate portion has a chevron shape, and includes an annular peripheral wall portion that goes up and down from the inner periphery of the thin portion, and a top portion that closes the upper end of the peripheral wall portion and is joined to the lid top plate portion,
The thickness of the thin part is thinner in the inner periphery than in the outer part.
It has a deformable wall thickness and has an annular hem that expands toward the bottom, at the lower end of the peripheral wall,
A cap characterized in that the outer peripheral edge of the hem portion is located in the vicinity of the lower side of the thin-walled portion in an unopened state, and is deformed and closely contacts the thin-walled portion when the lid is closed after opening.   2. The cap according to claim 1, wherein the thickness of the skirt portion is made thinner toward the outer peripheral edge.   3. The cap according to claim 1, wherein the lid includes a cylindrical sealing wall portion that hangs down from the lid top plate portion and contacts the inner surface of the extraction wall portion.   The cap according to claim 1, 2 or 3, wherein the cap is for a liquid container.

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