JP7134117B2 - cap - Google Patents

Description

The present invention relates to caps.

Conventionally, for example, as shown in Patent Document 1 below, a topped cylindrical cap body attached to the mouth of a container body, and a top wall portion of the cap body in which a hole for pouring out the contents is formed. and an inner plug disposed between the top wall and the lid for opening and closing the pouring hole, and the cap has no removable plug part that closes the pouring hole It has been known.

JP 2017-154748 A

However, with the conventional cap, when a positive pressure inside the container body is applied to the inner plug through the spout hole, for example, when the container body is filled with high-temperature contents and sealed, the inner plug There is a risk that the cap may float with respect to the cap body.

SUMMARY OF THE INVENTION The present invention has been made in consideration of such circumstances, and is intended to prevent the inner plug from rising from the cap body even when the positive pressure inside the container body is applied to the inner plug through the spout hole. The purpose is to provide a cap that can

In order to solve the above-mentioned problems and achieve such objects, the cap of the present invention comprises a topped cylindrical cap body attached to the mouth of a container body, and a top wall of the cap body that opens and closes. and an inner plug arranged between the top wall and the lid, wherein the top wall has a content pouring hole and the pouring hole The inner plug includes a fitting cylinder that is fitted and fixed to the fixed cylinder, and a sealing that covers and seals the pouring hole from above. and a breakable weakened portion connecting the fitting tube and the sealing tube. A regulating portion is provided that engages with the locking portion from below the locking portion to regulate the sealing cylinder from falling off from the lid.

According to this invention, when the lid body is moved upward with respect to the ceiling wall part, the regulation part of the lid body engages with the locking part of the sealing cylinder, so that the sealing cylinder moves along with the lid body to the ceiling wall. move upwards relative to the part. At this time, since the fitting cylinder connected to the sealing cylinder through the weakened portion is fixed to the fixed cylinder of the top wall portion, the weakened portion is broken by the tensile force, and the sealing cylinder is removed from the fitting cylinder. is isolated against As a result, the top wall portion and the pouring hole are opened.
In this open state, the fitting tube and the broken edge of the weakened portion are positioned on the upper surface of the top wall portion, and these can be visually recognized, so that the cap can be changed from the unopened state to the opened state. A user can be made to recognize that it shifted to .
Since the inner plug has a fitting tube that is fitted and fixed to the fixed tube, even if the positive pressure in the container body is applied to the inner plug through the spout hole, the inner plug remains against the cap body. You can prevent it from floating.

Here, the lid may be connected to the cap body via a hinge.

In this case, since the lid body is connected to the cap body via the hinge portion, the lid body can be easily opened and closed, and the lid body, the cap body, and the hinge portion are integrally formed. If so, the number of parts can be reduced.

Further, the weakened portion may be arranged at a position spaced apart in the circumferential direction from the opposite side of the hinge portion that sandwiches the cap shaft in the radial direction.

In this case, the weakened portion is disposed at a position circumferentially spaced apart from the opposite side of the hinge portion that sandwiches the cap shaft in the radial direction. , the portion of the sealing cylinder located on the opposite side of the hinge portion that sandwiches the cap shaft in the radial direction is not pulled downward by the weakened portion, and the upward movement of the sealing cylinder following the lid body is suppressed. It is possible to prevent it from being stolen, and it can be opened easily.

Moreover, the sealing tube may include a sealing tube fitted into the pouring hole.

In this case, since the sealing cylinder is provided with the sealing cylinder fitted in the spout hole, the internal plug serves as a part for suppressing upward movement of the internal plug with respect to the top wall portion, not only the fitting cylinder but also the sealing cylinder. Also, it is possible to improve the attachment strength of the inner plug to the top wall portion in an unopened state, and to reliably suppress the above-described floating of the inner plug with respect to the cap body.

The sealing cylinder includes an outer cylinder that radially surrounds the sealing cylinder and is connected to the fitting cylinder via the weakened portion. , an annular inner peripheral portion located radially inside and above the outer peripheral portion and having an inner side serving as the pouring hole, the outer peripheral portion and the inner A stepped portion connected to the peripheral portion and facing radially outward may be provided, and the outer cylinder may be fitted onto the stepped portion.

In this case, since the outer cylinder of the sealing cylinder is fitted onto the stepped portion of the upper surface of the top wall, the inner plug serves as a portion that suppresses upward movement of the inner plug with respect to the top wall. And not only the sealing cylinder but also the outer cylinder are provided, and it is possible to surely improve the mounting strength of the inner plug to the ceiling wall part in the unopened state, and the above-mentioned floating of the inner plug to the cap body is further improved. can be reliably suppressed.
Since the sealing cylinder has the outer cylinder, the relative positions of the inner plug and the cap body can be determined when the inner plug is assembled to the cap body. In the state of a single component before being assembled to the cap body, external force is less likely to be applied to the seal cylinder, and deformation of the seal cylinder can be suppressed, and the pouring hole can be reliably sealed by the seal cylinder. can.

ADVANTAGE OF THE INVENTION According to this invention, even if the positive pressure in a container main body is exerted on an inner plug through a spout hole, it can suppress that an inner plug floats with respect to a cap main body.

1 is a vertical cross-sectional view of a cap shown as an embodiment according to the present invention; FIG. It is a figure which shows the unsealing state of the cap shown in FIG. FIG. 2 is a top view of the inner plug shown in FIG. 1;

A cap 1 according to an embodiment of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 3, the cap 1 of this embodiment has a topped cylindrical cap body 11 attached to the mouth W1 of the container body W, and a top wall 12 of the cap body 11 that opens and closes. and an inner plug 14 disposed between the top wall portion 12 and the lid 13.

In the illustrated example, the lid 13 is formed in a capped tubular shape, the inner plug 14 is formed in a tubular shape, and the lid 13, the inner plug 14, and the cap body 11 are arranged coaxially with the common axis. It is Hereinafter, this common axis will be referred to as a cap axis O. Along the cap axis O, the top wall portion 35 side of the lid body 13 will be referred to as the upper side, and the open end side of the peripheral wall portion 36 of the cap body 11 will be referred to as the lower side. When viewed from above and below, the direction intersecting the cap axis O is called the radial direction, and the direction rotating around the cap axis O is called the circumferential direction.

In the top wall portion 12, a content pouring hole 15, a fixed cylinder 16 surrounding the pouring hole 15 from the outside in the radial direction, and a fixed cylinder 16 disposed radially inward of the fixed cylinder 16, the inside of which is the pouring hole 15. A pouring cylinder 17 is formed.
The pouring hole 15, the fixed cylinder 16, and the pouring cylinder 17 are arranged coaxially with the cap axis O. Note that the pouring tube 17 may not be formed on the top wall portion 12 .

The pouring hole 15 penetrates the top wall portion 12 in the vertical direction. The pouring tube 17 protrudes upward from the peripheral edge of the opening of the pouring hole 15 on the upper surface of the top wall portion 12 .
The fixed cylinder 16 protrudes upward from the outer peripheral edge of the upper surface of the ceiling wall portion 12 . The fixed cylinder 16 extends continuously over the entire circumferential direction. The upper end of the fixed cylinder 16 is positioned below the upper end of the extraction cylinder 17 . The fixed cylinder 16 is formed with an inner locking projection 16a projecting radially inward and an external locking projection 16b projecting radially outward.
A container fitting cylinder 34 is formed on the lower surface of the top wall portion 12 so as to extend downward and fit into the mouth portion W1. The container fitting cylinder 34 is arranged coaxially with the cap axis O. As shown in FIG. The container fitting tube 34 is arranged in a portion of the lower surface of the ceiling wall portion 12 located radially inward of the fixed tube 16 .

The lower surface of the ceiling wall portion 12, the outer peripheral surface of the container fitting tube 34, and the inner peripheral surface of the peripheral wall portion 36 of the cap body 11 open downward and extend continuously over the entire circumferential direction, and the cap An annular groove disposed coaxially with axis O is defined. A mouth portion W1 is inserted into this annular groove. The top opening edge of the mouth portion W1 abuts against the bottom surface of the top wall portion 12, and the container fitting cylinder 34 seals the inside of the mouth portion W1. An undercut projection is formed on the inner peripheral surface of the peripheral wall portion 36 of the cap body 11 so as to be undercut-fitted to the container locking projection formed on the outer peripheral surface of the mouth portion W1.

A seal auxiliary cylinder 22 is arranged inside the pouring hole 15 . The seal auxiliary cylinder 22 is arranged coaxially with the cap axis O. As shown in FIG. The upper end of the seal auxiliary cylinder 22 is located below the upper end of the pouring cylinder 17 . The vertical positions of the lower end opening edge of the seal auxiliary cylinder 22 and the opening peripheral edge portion of the pouring hole 15 on the lower surface of the top wall portion 12 are equal to each other. A radial gap between the outer peripheral surface of the seal auxiliary cylinder 22 and the inner peripheral surface of the pouring hole 15 is equal to or less than the thickness of the lower end portion of the later-described seal cylinder 29 of the inner plug 14 . The outer peripheral surface of the seal auxiliary cylinder 22 and the lower end portions of the inner peripheral surface of the pouring hole 15 are connected to each other via a plurality of connecting pieces 33 spaced apart in the circumferential direction.
A configuration that does not have the seal auxiliary cylinder 22 and the connecting piece 33 may be adopted.

The upper surface of the top wall portion 12 has an annular outer peripheral portion 18 formed with a fixed cylinder 16 and an annular outer peripheral portion 18 located radially inside and above the outer peripheral portion 18 and having a pouring hole 15 on the inside. and a stepped portion 20 connecting the outer peripheral portion 18 and the inner peripheral portion 19 and facing radially outward.

A container fitting cylinder 34 is formed on the lower surface of the outer peripheral portion 18 .
The upper end portion of the stepped portion 20 extends outward in the radial direction as it goes downward. A ridge portion 20a is formed at the lower portion of the stepped portion 20 so as to protrude outward in the radial direction and extend continuously over the entire area in the circumferential direction. The ridge portion 20a is detachably and tightly fitted into the lower end portion of an outer cylinder 30 of the inner plug 14, which will be described later.

The lid body 13 is connected to the peripheral wall portion 36 of the cap body 11 via the hinge portion 21 . The lid body 13, the cap main body 11, and the hinge portion 21 are integrally formed.
A peripheral wall portion 24 of the lid body 13 is detachably fitted to the fixed cylinder 16 . An undercut projection 24 a is formed on the inner peripheral surface of the peripheral wall portion 24 of the lid 13 so as to be undercut-fitted to the outer locking projection 16 b of the fixed cylinder 16 . At the lower end of the peripheral wall portion 24 of the lid body 13, an operation projecting piece 23 projecting radially outward is formed at a portion located on the opposite side of the hinge portion 21 that sandwiches the cap axis O in the radial direction. .

The top wall portion 35 of the lid 13 is formed with a cylindrical restricting portion 25 protruding downward. The restricting portion 25 is arranged coaxially with the cap axis O. As shown in FIG. The restricting portion 25 is formed with a restricting protrusion 25a protruding radially inward. The restricting protrusions 25a may extend continuously over the entire circumference, may extend intermittently, or may be scattered. A lower opening edge of the restricting portion 25 vertically faces the outer peripheral portion 18 of the upper surface of the ceiling wall portion 12 .

The inner plug 14 includes a fitting cylinder 26 that is fitted and fixed to the fixed cylinder 16, a sealing cylinder 27 that covers and seals the pouring hole 15 from above, and a fitting cylinder 26 and a sealing cylinder 27. and a rupturable weakened portion 28 connecting the . The inner plug 14 is spaced downward from the lower surface of the top wall portion 35 of the lid 13 .

The fitting cylinder 26 is fitted inside the fixed cylinder 16 . Note that the fitting tube 26 may be fitted onto the fixed tube 16 . An undercut protrusion 26a is formed on the outer peripheral surface of the fitting tube 26 so as to be undercut-fitted to the inner locking protrusion 16a of the fixed tube 16 . The vertical positions of the upper ends of the fitting tube 26 and the fixed tube 16 are equal to each other. A lower end opening edge of the fitting tube 26 abuts on the outer peripheral portion 18 of the ceiling wall portion 12 . The fitting tube 26 is spaced radially outward from the stepped portion 20 of the top wall portion 12 .

The sealing cylinder 27 includes a sealing cylinder 29 fitted in the pouring hole 15 and an outer cylinder 30 surrounding the sealing cylinder 29 from the outside in the radial direction and connected to the fitting cylinder 26 via a weakened portion 28 . , an annular top plate 31 connecting the upper ends of the seal cylinder 29 and the outer cylinder 30 to each other, and a closing plate 32 closing the inside of the seal cylinder 29 .

The lower end of the seal cylinder 29 is located above the lower end of the outer cylinder 30 . The outer diameter of the lower end of the seal cylinder 29 is larger than the inner diameter of the pour hole 15 , and the lower end of the seal cylinder 29 is fitted in the pour hole 15 while being elastically deformed. The seal cylinder 29 is in close contact with both the inner peripheral surface of the pouring hole 15 and the outer peripheral surface of the auxiliary seal cylinder 22 . The upper end portion of the seal cylinder 29 is located above the pouring hole 15 and separated downward from the lower surface of the top wall portion 35 of the lid body 13 .

The outer peripheral edge of the closing plate 32 is connected to a portion of the inner peripheral surface of the seal cylinder 29 that is located above the lower end portion fitted to the auxiliary seal cylinder 22 .
The top plate 31 covers the top opening edge of the dispensing tube 17 from above. The lower surface of the top plate 31 is located above the upper opening edge of the pouring cylinder 17 . The top surface of the top plate 31 is positioned below the bottom surface of the top wall portion 35 of the lid 13 . The top surface of the top plate 31 may contact the bottom surface of the top wall portion 35 of the lid 13 .

The outer cylinder 30 is fitted onto the stepped portion 20 of the top wall portion 12 . The inner peripheral surface of the outer cylinder 30 is formed smooth over the entire area. A lower opening edge of the outer cylinder 30 is in contact with or close to the outer peripheral portion 18 of the ceiling wall portion 12 . The upper end portion of the outer cylinder 30 is inserted into the restricting portion 25 while being spaced downward from the lower surface of the top wall portion 35 of the lid 13 . The outer peripheral surface of the outer cylinder 30 is spaced radially inward from the inner peripheral surface of the restricting portion 25 .

A locking portion 27a is formed on the outer peripheral surface of the outer cylinder 30 so as to protrude radially outward. The locking portion 27 a is arranged at the upper end portion of the outer cylinder 30 . The engaging portion 27a abuts or approaches the restricting protrusion 25a formed on the restricting portion 25 of the lid 13 from above the restricting protrusion 25a. As a result, when the lid 13 opens the top wall portion 12, the restricting protrusion 25a engages with the locking portion 27a from below the locking portion 27a, thereby closing the lid of the sealing tube 27. Regulate dropout from 13.

As shown in FIG. 3, a plurality of locking portions 27a are arranged at intervals in the circumferential direction. The circumferential sizes of the plurality of locking portions 27a are equal to each other. The locking portion 27a is arranged on the outer peripheral surface of the outer cylinder 30 at a position spaced apart in the circumferential direction from the portion X located on the opposite side of the hinge portion 21 that sandwiches the cap axis O in the radial direction.

The size of the interval between the engaging portions 27a adjacent to each other in the circumferential direction is the largest in the interval including the portion X on the outer peripheral surface of the outer cylinder 30, and the remaining plural intervals are equal to each other. . Among them, the largest distance is the center of the cap axis O with respect to a straight line L that passes through the circumferential central portion of the hinge portion 21 and the cap axis O on the outer peripheral surface of the outer cylinder 30. is approximately equal to the circumference of the portion over an angular range of approximately ±30°.

A plurality of weakened portions 28 are arranged at intervals in the circumferential direction. The weakened portion 28 connects the outer peripheral surface of the outer cylinder 30 and the fitting cylinder 26 . The weakened portion 28 connects the outer peripheral surface of the outer cylinder 30 and the lower ends of the fitting cylinders 26 to each other.
The weakened portion 28 is arranged at a position away from the portion X on the outer peripheral surface of the outer cylinder 30 in the circumferential direction. The weakened portions 28 are arranged on the outer peripheral surface of the outer cylinder 30 at positions spaced apart in the circumferential direction from the positions in the circumferential direction where the plurality of engaging portions 27a are provided. The plurality of weakened portions 28 are circumferentially adjacent to all of the plurality of locking portions 27a.

The interval between the weakened portions 28 adjacent to each other in the circumferential direction is the largest in the interval including the portion X on the outer peripheral surface of the outer cylinder 30, and is equal in the remaining plural intervals. Of these, the largest interval is slightly smaller than the largest interval among the plurality of intervals between the engaging portions 27a adjacent to each other in the circumferential direction. Of the plurality of weakened portions 28, the two weakened portions 28 sandwiching the portion X on the outer peripheral surface of the outer cylinder 30 in the circumferential direction and having the largest circumferential interval are the outer cylinder 30 circumferentially sandwiches the portion X, and is circumferentially close to each of the two engaging portions 27a having the largest circumferential interval.
In a top view of the inner plug 14 as shown in FIG. 3, the plurality of weakened portions 28 and the plurality of locking portions 27a are all visible without overlapping each other.

As described above, according to the cap 1 according to the present embodiment, when the lid 13 is moved upward with respect to the top wall portion 12 , the restricting portion 25 of the lid 13 is moved to the locking portion 27 a of the sealing cylinder 27 . , the sealing tube 27 moves upward with respect to the top wall portion 12 together with the lid body 13 . At this time, since the fitting tube 26 connected to the sealing tube 27 via the weakened portion 28 is fixed to the fixed tube 16 of the ceiling wall portion 12, the weakened portion 28 is broken by the tensile force, and the sealing is performed. The stop cylinder 27 is separated from the fitting cylinder 26 . Thereby, the top wall portion 12 and the pouring hole 15 are opened.

In this open state, the broken edges of the fitting tube 26 and the weakened portion 28 are positioned on the upper surface of the top wall portion 12, and these can be visually recognized, so that the cap 1 is unopened. The user can be made to recognize that the state has shifted to the unsealed state.
Since the inner plug 14 is provided with the fitting tube 26 fitted and fixed to the fixed tube 16, even if the positive pressure inside the container body W is applied to the inner plug 14 through the spout hole 15, the inner plug 14 remains closed. 14 can be suppressed from floating with respect to the cap main body 11. - 特許庁

Since the lid body 13 is connected to the cap main body 11 via the hinge portion 21, the opening and closing operation of the lid body 13 can be easily performed. Since the lid body 13, the cap main body 11, and the hinge portion 21 are integrally formed, the number of parts can be reduced.

Since the weakened portion 28 is disposed at a position spaced apart in the circumferential direction from the opposite side of the hinge portion 21 radially sandwiching the cap axis O, the lid body 13 is rotated upward around the hinge portion 21. Sometimes, the portion X on the outer peripheral surface of the outer cylinder 30 is not pulled downward by the weakened portion 28, and the upward movement of the sealing cylinder 27 following the lid body 13 is prevented from being suppressed. available and can be easily opened.

Since the sealing cylinder 27 is provided with the sealing cylinder 29 fitted in the pouring hole 15, the internal plug 14 is only the fitting cylinder 26 as a portion that suppresses upward movement of the internal plug 14 with respect to the top wall portion 12. In addition, the sealing cylinder 29 is also provided, and it is possible to improve the mounting strength of the inner plug 14 to the ceiling wall portion 12 in an unopened state, and to reliably suppress the above-mentioned floating of the inner plug 14 with respect to the cap body 11. can do.

Since the outer cylinder 30 of the sealing cylinder 27 is fitted onto the stepped portion 20 on the upper surface of the top wall portion 12 , the inner plug 14 functions as a portion that suppresses upward movement of the inner plug 14 with respect to the top wall portion 12 . Not only the fitting tube 26 and the sealing tube 29, but also the outer tube 30 is provided. It is possible to more reliably suppress the aforementioned lifting of the cap body 11 from the cap body 11 .

Since the sealing cylinder 27 is provided with the outer cylinder 30, the relative positions of the internal plug 14 and the cap body 11 can be determined when the internal plug 14 is assembled to the cap body 11, and this assembly can be easily performed. In addition, external force is less likely to be applied to the seal cylinder 29 when the inner plug 14 is a single component before being assembled to the cap main body 11, and deformation of the seal cylinder 29 can be suppressed. Thus, the pouring hole 15 can be reliably sealed.

A seal auxiliary cylinder 22 is arranged inside the pour hole 15, and the seal cylinder 29 is in close contact with both the inner peripheral surface of the pour hole 15 and the outer peripheral surface of the seal auxiliary cylinder 22. It is possible to reliably improve the attachment strength of the inner plug 14 to the ceiling wall portion 12 in an unopened state, and it is possible to more reliably suppress the floating of the inner plug 14 with respect to the cap body 11. Sealability of the pouring hole 15 can be reliably secured.

The present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the scope of the invention.

For example, in the above-described embodiment, the lid body 13 is a hinge cap connected to the cap body 11 via the hinge part 21. However, the lid body 13 is connected to the cap body 11 via the hinge part 21. Instead, a structure or the like in which it is detachably screwed to the cap body 11 may be adopted.
The sealing cylinder 27 may be changed as appropriate, for example, by adopting a configuration that does not have the outer cylinder 30 or the sealing cylinder 29 .
The upper surface of the ceiling wall portion 12 of the cap body 11 may be formed flat over the entire area.
The weakened portion 28 and the locking portion 27a may be positioned on the opposite side of the hinge portion 21 that sandwiches the cap axis O in the radial direction.

In addition, it is possible to appropriately replace the components in the above-described embodiment with well-known components without departing from the gist of the present invention, and the above-described modifications may be combined as appropriate.

1 cap 11 cap main body 12 ceiling wall portion 13 lid body 14 inner stopper 15 spout hole 16 fixed cylinder 18 outer peripheral portion 19 inner peripheral portion 20 stepped portion 21 hinge portion 25 regulation portion 26 fitting cylinder 27 sealing cylinder 27a locking portion 28 Weakened portion 29 Seal cylinder 30 Outer cylinder O Cap shaft W Container main body W1 Mouth

Claims (5)

a truncated cylindrical cap body attached to the mouth of the container body;
a lid that opens and closes the top wall of the cap body;
a cap provided between the ceiling wall portion and the lid body,
A content pouring hole and a fixed cylinder surrounding the pouring hole from the outside in the radial direction are formed in the top wall,
The inner plug is
a fitting cylinder fitted and fixed to the fixed cylinder;
a sealing cylinder that covers and seals the pouring hole from above;
a breakable weakened portion connecting the fitting tube and the sealing tube,
When the ceiling wall portion is opened, the lid body engages with a locking portion provided on the sealing cylinder from below the locking portion, and the lid body of the sealing cylinder engages with the locking portion. A cap provided with a restricting portion that restricts the falling off of the cap. 2. The cap according to claim 1, wherein said lid is connected to said cap body via a hinge. 3. The cap according to claim 2, wherein said weakened portion is disposed at a position circumferentially spaced from the opposite side of said hinge portion diametrically sandwiching the cap axis. 4. The cap according to any one of claims 1 to 3, wherein said sealing tube comprises a sealing tube fitted in said pouring hole. The sealing cylinder includes an outer cylinder surrounding the sealing cylinder from the outside in the radial direction and connected to the fitting cylinder via the weakened portion,
The upper surface of the ceiling wall is
an annular outer peripheral portion on which the fixed cylinder is formed;
an annular inner peripheral portion located radially inside and above the outer peripheral portion, the inside being the pouring hole;
a stepped portion connecting the outer peripheral portion and the inner peripheral portion and facing radially outward,
5. The cap according to claim 4, wherein said outer cylinder is fitted onto said stepped portion.

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