JP2001278308A - Separately disposable cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinged cap comprising a cap body and an upper lid wherein accidental breakage of a score for removing a skirt provided on the skirt of the cap body can be effectively prevented when capping, it is easy to remove the cap due to breakage of the score after use, and the cap is excellent in separately disposing property. SOLUTION: The separately disposable cap includes a top plate and the skirt wherein the skirt comprises a double wall structure separated into an inner wall and an outer wall by a peripheral slit. The inner wall is formed with a protrusion for engaging with a container neck on an internal side, and the outer wall is formed with the vertical score for tearing the skirt. The outer wall and the inner wall are equipped with engaging mechanisms to be engaged with each other for suppressing a relative rotation of both walls.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separately disposable plastic cap, and more particularly, to preventing accidental breakage of a score for removing a skirt portion when plugging a container neck. Regarding the cap.

[0002]

2. Description of the Related Art Separation and disposal of garbage has recently been required from the standpoint of garbage disposal and resource saving. In particular, the separation and disposal of plastic caps attached to container mouths has also been required. I have.

[0003] A spoutable plastic cap such as a seasoning comprises a cap body fitted and fixed to a container mouth, and an upper lid that can be opened and closed by the cap body. In this type of cap, since the cap body is fitted and fixed to the container mouth, a tool such as a bottle opener is generally required to remove the used cap from the container mouth. Was extremely troublesome, and the separability was still insufficient.

[0004] For this reason, many proposals have been made to improve the separation and disposal of this type of cap. For example,
Japanese Unexamined Utility Model Publication No. Hei 7-11559 and Japanese Unexamined Utility Model Publication No. Hei 5-34151 disclose a hinge cap in which a skirt portion of a cap body is formed with a score extending downward from the vicinity of a hinge connection portion with an upper lid. ing. These hinge caps tear the skirt score by holding down the top lid and pushing it down, which destroys the skirt, so that the cap can be easily removed from the container opening without using special tools. It is possible.

[0005]

In order to facilitate tearing of the score of the skirt portion and to facilitate removal of the cap body from the container neck portion, it is necessary to make the score thinner. When the score is made thinner, the score is broken accidentally when the cap is plugged. That is, in this type of cap, a projection for engaging with the container neck is provided on the inner surface of the skirt portion, and when the stopper is plugged, it is necessary for the engagement projection to climb over the bead (projection) of the container neck. Occasionally, a circumferential tension is generated in the skirt portion, so that accidental breakage of the score occurs.

In order to prevent accidental breakage of the score, Japanese Patent Application Laid-Open No. Hei 8-156960 proposed by the present applicant discloses a score composed of a combination of a vertical weakening line and a horizontal weakening line. Although this method is shown to be used, even if this means is effective in preventing the entire score from being broken, it is difficult to say that the tendency of the vertical weakening line to break has been eliminated.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a hinge cap comprising a cap body and an upper lid, in which accidental breakage of the score for removing the skirt provided on the skirt of the cap body when plugging is effectively prevented. Another object of the present invention is to provide a hinge cap that can be easily removed by breaking the score after use and is excellent in sorting and disposal.

[0008]

According to the present invention, there is provided a double wall structure comprising a top plate and a skirt, wherein the skirt is separated into an inner wall and an outer wall by a circumferential slit. An inner wall is provided with a projection for engaging with a container neck on the inner surface, and a score for vertical skirt tearing is formed on the outer wall. The invention provides a separable and disposable cap provided with a matching engagement mechanism that engages and suppresses relative rotation between the two. In the cap of the present invention, 1. The remaining thickness of the skirt tear score portion has a thickness distribution in which the upper portion is thinner and the lower portion is thicker. 2. The rotation suppression engagement mechanism is an engagement portion between an outer wall and an inner wall that has irregularities in a radial direction and abuts in a circumferential direction; 3. the rotation suppressing engagement mechanism is formed by engraving at least a part of a circumferential slit having irregularities in a radial direction on a skirt portion; 4. the outer and inner walls are connected via at least a plurality of breakable bridges; It is preferable that cutouts extending upward from the lower end of the inner wall past the engagement projection with the container neck from the lower end are provided at intervals in the circumferential direction. The present invention can be applied to a cap in which an upper lid is connected to the outer wall via a hinge, and the top plate portion is provided with a locking portion of the upper lid. It is preferable that a skirt tear score is provided on the outer side in the circumferential direction and in the vicinity thereof. The present invention can also be applied to a cap in which a screw portion for locking an upper lid is formed on the top plate portion. In this case, the upper portion of the outer wall is adjacent to a skirt tear score. Preferably, a knob for starting score tearing is provided.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The present invention has a double-walled structure having a top plate and a skirt, wherein the skirt is separated into an inner wall and an outer wall by a circumferential slit. Side, a projection for engaging with the container neck is formed on the side, and a score for vertical skirt tearing is formed on the outer wall. Further, it is characterized in that an engagement mechanism for suppressing relative rotation between the two is provided.

[0010] This makes it possible to effectively prevent accidental breakage of the score for removing the skirt portion provided on the skirt portion of the cap body at the time of plugging, and facilitate removal of the score due to breakage of the score after use. By doing so, it is possible to separate and discard the cap and the container with good workability.

[0011] The separable and disposable cap of the present invention is provided with a projection for engaging with the container neck on the inner surface side of the skirt of the cap body, but when removing the cap after use, the container neck and the inner surface of the skirt are used. It is necessary to weaken the engagement with the engaging projection on the side. For this reason, it is preferable that the skirt portion is composed of an outer wall having a score for skirt tearing and an inner wall having a projection for engaging with the container neck, and the outer wall is provided at least partially so as to be detachable. According to the above configuration, at the time of disposal after use of the contents, after the score for skirt tearing of the outer wall is torn, at least a part of the outer wall is removed outward to release the constraint of the outer wall to the inner wall. The cap body can be easily removed from the container opening by allowing the outward expansion to the inner wall and loosening the release of the container opening from the inner wall engaging projection.

As already pointed out, in the cap to which the present invention is directed, the thinner the residual wall thickness of the skirt tear score, the easier the cap can be removed from the container opening after use by tearing the cap. On the other hand, there is a problem that the accidental breakage of the score for skirt tearing at the time of tapping also occurs more frequently as the residual thickness of this score is smaller. This tendency is particularly remarkable in a cap in which the skirt portion of the cap is divided into an outer wall and an inner wall.

In this type of cap, a projection for engaging with the container neck is provided on the inner surface of the skirt, and the projection for engagement is used when the stopper is plugged.
The skirt portion spreads in the circumferential direction at the time of overcoming, and the tension generated in the skirt tear score due to the spread has been considered to cause accidental breakage of the score.

However, according to the study of the present inventors, when a cap having an inner diameter of the protrusion of 30 mm is plugged into a container having an outer diameter of 32 mm of the container neck, the circumferential expansion generated in the skirt portion, that is, Although the amount of elongation is only about 6% when viewed from the entire skirt portion, it has been conceived that if the spread, that is, the elongation is concentrated on the skirt tear score portion, it can sufficiently cause breakage. Further, it was also found that in the cap in which the score was broken as described above, the circumferential position shift, that is, rotation occurred in the score or the skirt portion in the vicinity thereof.

Thus, according to the present invention, a novel structure is provided in which the outer side wall and the inner side wall of the skirt portion are provided with a matching engagement mechanism which engages and suppresses relative rotation between the two. By doing so, the spread or elongation that occurs on the outer wall when the cap is plugged is evenly distributed over the entire outer wall, so that it is prevented from concentrating on the skirt tear score portion, and the accidental score of the score at the time of plugging is removed. A severe break can be effectively eliminated.

In the cap of the present invention, the residual thickness of the skirt tear score portion has a thickness distribution in which the upper portion is thinner and the lower portion is thicker, so that the score can be easily broken after use. In addition, it is preferable to prevent accidental breakage of the score. Breaking of the skirt tear score starts from the upper end of the skirt, but by thinning the residual wall thickness at the top where the break of the score starts, tearing of the first score can be started with a relatively small force. It can be started, and once the tearing proceeds, the tearing is easily performed even if the residual thickness at the bottom is thick. Further, in the cap of the present invention, since the circumferential spread suppressing mechanism is provided, the degree of circumferential spread of the skirt outer wall at the time of plugging is suppressed at the upper portion, but tends to be larger at the lower portion than at the upper portion. is there. For this reason, accidental breakage of the skirt tear score at the time of tapping tends to mainly occur at the lower part of the score. In the present invention, since the remaining thickness distribution of the score is made thicker in the lower portion, accidental breakage of the skirt tear score at the time of plugging is effectively prevented. Furthermore, in the residual thickness distribution of the above-mentioned score, even if a partial break occurs at the upper part of the skirt tearing score at the time of tapping, the residual thickness of the score is thicker at the lower part. Is prevented by the thick portion, and complete cutting of the score is effectively prevented.

In the present invention, the matching engagement mechanism for suppressing the rotation between the outer wall and the inner wall is provided when the cap is plugged.
It engages with each other to disperse the spread or elongation in the circumferential direction over the entire outer wall, and to prevent the score from being concentrated on the skirt tear score, so long as it has such an effect. Can be used. However, mechanically, it is preferable that the outer wall and the inner wall have matching protrusions that have irregularities in the radial direction and abut in the circumferential direction. That is, since the convex portion (concave portion) of the outer wall and the concave portion (convex portion) of the inner wall come into contact with each other in the circumferential direction, relative displacement of the outer wall and the inner wall in the circumferential direction, that is, rotation is effective. Can be suppressed.

In the cap of the present invention, it is most preferable that the rotation suppressing engagement mechanism is formed by engraving at least a part of a circumferential slit having irregularities in a radial direction on a skirt portion. As already pointed out, it is important that the skirt portion is separated into the outer wall and the inner wall from the viewpoint of easy separation and disposal of the cap. Separation of the inner wall,
This is extremely advantageous because the formation of a consistent engagement mechanism for suppressing relative rotation is performed simultaneously and all at once.

It is preferable that the outer side wall and the inner side wall are connected via at least a plurality of breakable bridges in order to facilitate separation and disposal. With the above configuration, at the time of disposal after use of the contents, it is possible to tear off the skirt tear score of the outer wall, break the bridge, and remove at least a part of the outer wall outward. The cap body is released from the container opening by releasing the constraint of the outer wall to the inner wall, allowing the outward expansion to the inner wall, and loosening the release between the container opening and the inner wall engaging portion. Can be easily removed.

Further, the inner wall is provided with cutouts extending upward from the lower end past the engagement portion with the container neck at intervals in the circumferential direction. It is preferable in terms of easy separation and disposal. It has already been pointed out that the inner wall is provided with an engagement portion with the container neck, but if the notch is provided on the inner wall, the inner wall can be spread with a relatively small force, and the necessary tapping is required. There is an advantage that the plug pressure is reduced, thereby improving the plugging workability and preventing the cap from being broken at the time of plugging. Further, since the inner wall can be spread with a relatively small force, there is an advantage that the used cap can be easily removed from the container opening.

The present invention can be applied to a cap in which an upper lid is connected to the outer wall via a hinge, and a locking portion of the upper lid is provided on the top plate. In this case, Preferably, a skirt tear score is provided outside and close to the hinge.
That is, when the skirt tear score is provided in the above positional relationship, the force is effectively transmitted as a shear force to the score via the hinge by gripping the upper lid and pulling it outward or further downward. Therefore, the cap can be effectively removed by shearing the score. Also,
Since the hinge is a connecting portion between the skirt portion and the upper lid of the cap body, one side of the skirt tear score is restricted from expanding in the circumferential direction by this hinge, and in combination with the operation of the rotation suppressing mechanism described above, It is more reliable to prevent accidental breakage of the skirt tear score at the time of tapping.

The present invention can also be applied to a cap having a screw portion formed on the top plate portion for opening and closing the upper lid so that the top cover can be opened and closed. In this case, a skirt is provided on the upper portion of the outer wall. It is preferable that a score tearing start knob is provided adjacent to the score for tearing. Even with a cap with a top lid that can be opened and closed by screw engagement,
By using the rotation suppressing mechanism of the present invention, accidental breakage of the skirt tear score at the time of tapping can be effectively suppressed.However, when the cap body is removed after use, breakage of the skirt tear score may occur. Need an opportunity to start. If a knob for starting score tearing is provided adjacent to the skirt tearing score, it is convenient because the score can be easily started by pushing down the knob with a finger.

[0023]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described in detail below. In the accompanying drawings, FIG. 1 is a top view showing an example (Example 1) of the cap of the present invention with an upper lid opened, FIG. 2 is a cross-sectional view of the cap of FIG. 1, and FIG. FIG. 4 is a bottom view showing the cap with the upper lid closed, FIG. 4 is a top view showing a cutter shape used for molding the cap of FIG. 1, and FIG. 5 is another example of the cap of the present invention (Example 2). FIG. 6 is a bottom view showing a state in which the upper lid is closed, FIG. 6 is a top view showing a cutter shape used for forming the cap of FIG. 5, and FIG. 7 is a lid showing another example (Example 3) of the cap of the present invention. FIG. 8 is a top view showing a cutter shape used in the molding of FIG. 7, and FIG. 9 is a top view of another example (Example 4) of the cap of the present invention. FIG. 10 is a top view showing the state, FIG. 10 is a side view of the cap of FIG. 9, and FIG. FIG. 12 is a side cross-sectional view showing a state in which the cap of FIG. 1 is fitted to a container mouth, and FIG. 13 is an enlarged view showing a score for skirt tearing in the hinge cap of FIG. It is sectional drawing.

[Embodiment 1] A cap having an inner hinge according to the present invention roughly comprises a cap body 1 and an upper lid 4 connected to the cap body 1 via a hinge 3. The cap body 1 includes a top plate portion 10 and a skirt portion 2 hanging from the periphery of the top plate portion.
Consists of an outer wall 23 and an inner wall 24 which are concentrically divided by a circumferential slit 25. An engagement portion 21 with the container opening 5 (see FIG. 12) is formed on the inner surface of the inner wall 24. The engaging portion 21 is formed of a radially inwardly protruding portion in the specific example shown in the drawing. Skirt outside wall 23
Is connected to the lower surface of the upper lid 4 via a hinge 3, and the upper lid 4 is pivotable about the hinge 3,
It can be opened and closed freely between the open position shown in FIGS. 1 and 2 and the closed position shown in FIG.

The top plate 10 of the cap main body is provided with various mechanisms known per se which are provided on this type of hinge cap. That is, a scheduled opening portion 12 is formed on the top plate portion 10 of the cap body 1 by the score 11, and the opening scheduled portion 12 is provided with an opening tab 13 via an upright support leg 14. That is, the opening tab 13
Is pulled to break the score 11, an opening is formed in the opening scheduled portion 12, and the container content liquid is poured out through this opening. In this case, the opening tab 13 is formed in a ring shape so that it can be easily pulled by hand, and it is preferable to provide a knurled projection for preventing slippage on the inner surface thereof. A pouring cylinder (circumferential projection) 15 is provided on the upper surface of the top plate portion 10 so as to surround the planned opening portion 12. That is, when the content liquid is poured out, the pouring cylinder 15 serves as a guide, so that the liquid can be poured smoothly.

As best shown in FIG. 12, a projection 21 is formed on the inner surface of the inner side wall 24 of the skirt portion 2 so as to go over the outer bead 51 of the container neck 5 and engage with the concave portion 52. The top surface 53 of the container neck 5 is brought into close contact with the inner surface of the top plate portion 10 so that the cap can be reliably held and hermetically held. Further, in this specific example, an inner ring 16 that engages with the inner peripheral side of the container neck portion 5 is formed on the inner surface of the top plate portion 10.
The inner peripheral surface 54 is also sealed, so that the sealing is further ensured.

On the other hand, the top cover 4 also has a top plate 41 and a skirt 4
A tab 43 for opening the upper lid is provided at the lower portion of the skirt portion and on the opposite side of the hinge connection portion 3. An inner plug 44 is formed inside the skirt portion 42 of the upper lid 4 so as to sealingly engage with the pouring tube 15 of the cap body.

The pouring cylinder 15 of the cap body is
The half-peripheral portion (15a) on the side opposite to the hinge connection portion 3 is tall, and the half-peripheral portion (15b) on the hinge connection portion 3 side is short. By doing so, when the upper lid 4 is closed, the inner plug 44 provided on the upper lid 4 smoothly pours out into the cylinder 15 and the turning of the upper lid 4 is not hindered. In addition, since the content liquid is poured out from the side opposite to the hinge connection portion 3, the function of the pouring cylinder 15 as a guide for pouring out is not impaired.

Above the periphery of the top plate 10 of the cap body, a projection 17 for locking the upper lid is formed circumferentially. Corresponding to the locking projections 17, locking concave portions 45 are provided on the inner surface of the skirt portion 42 of the upper lid 4, and these are engaged to stably maintain the closed state of the upper lid. It has become. Further, a tab 4 for opening the upper lid 4 is provided.
In order to facilitate gripping of the cap 3, a recess 22 is formed in the skirt portion 2 of the cap body, into which a finger can be inserted.

The hinge connecting portion 3 has a wide central hinge 31 flush with the lower surface 46 of the skirt portion of the upper lid 4, and is provided on both sides of the central hinge 31 at a smaller interval than the central hinge and above the upper lid and the cap body. And a narrow hinge 32 connected downward. The side hinge 32 is extendable and contractable, and is stably maintained in the state of FIG. 2 in which the upper lid 4 is open.

The skirt portion 2 of the cap body is composed of a peripheral outer wall 23 having a hinge connection portion 3 and a score 6 for skirt tearing, and a peripheral inner wall 24 having an engagement portion 21 with the container neck. Is done. That is, the outer wall 23 and the inner wall 24 are concentrically divided by the circumferential slit 25, and the outer wall 23 and the inner wall 24 can be broken at least on the hinge side in the upper part.
6 are connected.

The score 6 for skirt tearing includes the hinge 3
The score 6 is formed by providing a groove 61 from the inner surface side of the outer wall 23 to make the outer wall thinner. When the skirt tearing score 6 is provided in the above positional relationship, the upper lid 4 is gripped and pulled outward or further downward, so that this force is effective as a shearing force on the score 6 via the hinge 3. The cap is effectively removed by shearing the score 6. The hinge 3 is provided on the skirt portion of the cap body (the outer wall 2).
3) and the upper lid 4 are connected, so that one side of the skirt tear score 6 is restrained from expanding in the circumferential direction by the hinge 3, and the action of an engagement mechanism 7 between an outer wall and an inner wall described later. In combination with this, it is more reliable to prevent accidental breakage of the skirt tear score 6 during tapping.

In FIG. 13 showing the detailed structure of the score 6 for skirt tearing, the remaining thickness of the score 6 for skirt tearing has a thickness distribution in which the upper portion 62 is thinner and the lower portion 63 is thicker. The score 6 after the use of the container is easily broken, and accidental breakage of the score 6 at the time of tapping is prevented. In the specific example shown in FIG. 13B, the residual thickness of the score 6 is formed so as to gradually increase in thickness downward, while in the specific example shown in FIG. The remaining thickness of the score 6 is formed so as to be tapered downward.

On the other hand, on the inner wall 24 of the skirt portion, in order to facilitate the outward spreading of the inner wall 24, the inner wall 24 extends in the axial direction beyond the engagement projection 21 from the lower end at intervals in the circumferential direction. An extended notch 27 is provided. After cutting the skirt tear score 6, the upper lid 4 is gripped and pulled outward to break the bridge 26 and separate the outer wall 23, thereby releasing the constraint of the outer wall 23 and releasing the inner wall 24. By allowing outward expansion, the engagement between the container neck 5 and the engagement projection 21 on the inner wall is released, and the cap body can be easily removed.

According to the present invention, an engagement mechanism 7 is provided between the outer wall 23 and the inner wall 24 to suppress the relative rotation of the two. The relative rotation suppressing engagement mechanism 7 has an engagement portion on the inner surface side of the outer wall 23 and the outer surface side of the inner wall 24 that are uneven in the radial direction and abut in the circumferential direction. The engagement mechanism 7 preferably has uneven shapes that are compatible with each other.

As best shown in FIG. 3, in this specific example, a circumferential slit 25 having a corrugated pattern is formed in the skirt portion 2, and a result of engraving by the circumferential slit 25 is obtained. In the separated outer wall 23, a large number of convex portions 77a for the radially inward direction and concave portions 78a for the radially inward direction are formed alternately. On the other hand, on the separated inner wall 24, a large number of convex portions 77b for the radial direction and concave portions 78b for the radial direction are formed alternately. The uneven portion of the outer wall 23 and the uneven portion of the inner wall 24 have consistency,
In the state where the slit 25 is engraved, the convex portion 77a of the outer wall 23 and the concave portion 78b of the inner wall 24 can abut in the circumferential direction, and the concave portion 78a of the outer wall 23 and the inner wall 2
The fourth projection 77b can also be abutted in the circumferential direction. Thus, as shown in FIG. 3, the uneven portion of the outer wall 23 and the uneven portion of the inner wall 24 are non-rotatably engaged with each other. The breaking of the score 6 is suppressed by the above simple mechanism.

In this specific example, the uneven portion of the outer wall 23 and the uneven portion of the inner wall 24 are provided over the entire circumference of the skirt portion, while the skirt tear score 6 is provided on one side of the hinge connection portion 3. And it is provided in close proximity to this. The cap body is provided with a projection 17 for locking the upper lid in a circumferential shape.
It has already been pointed out that a locking recess 45 is provided on the inner surface of 2, but these keep the closed state of the upper lid stably, but prevent rotation of the upper lid and the cap body in a horizontal plane. However, the combination of the irregularities on the outer wall 23 and the irregularities on the inner wall 24 can effectively prevent rotation on a horizontal plane.

In the cap according to the present embodiment, the rotation suppressing engagement mechanism 7 is formed by engraving a circumferential slit 25 having at least a portion having irregularities in the radial direction on the skirt portion 2. The circumferential slit 25 can be engraved by using the cutter 100 shown in FIG. The cutter 100 is formed in a circumferential shape as a whole, but is provided with wavy irregularities composed of a convex portion 101 for the radially outward direction and a convex portion 102 for the radially inward direction. As already pointed out, it is important that the skirt portion 2 is separated into the outer side wall 24 and the inner side wall 23 from the viewpoint of easy separation and disposal of the cap. This is extremely advantageous because the separation of the outer side wall and the inner side wall and the formation of a consistent engagement mechanism for suppressing relative rotation are performed simultaneously and at once.

In the cap of this embodiment, the container neck 5 is plugged with the upper lid 4 closed on the cap body 1. At the time of this stoppering, the radially inwardly protruding portion 21 provided on the inner side wall 24 of the skirt climbs over the bead 51 of the container neck portion 5 and engages with the concave portion 52, so that the cap is fixedly held and sealed to the container neck portion. Done. Projection 2 on inner wall
When the vehicle 1 gets over the bead 51 of the container neck 5, the inner wall 2
4 spreads in the circumferential direction, and the outer wall 23 also spreads in the circumferential direction.
The rotation preventing mechanism 7 for preventing the relative rotation between the two is provided, so that the skirt tearing score 6 is prevented from spreading in the circumferential direction at the portion thereof, and the accidental breaking of the score 6 is effectively prevented. Can be prevented.

When the purchaser of the container with a cap uses the contents, the score 11 is broken by pulling the opening tab 13, an opening is formed in the opening portion 12, and the opening and the pouring cylinder 15 are formed. Through which the liquid in the container is poured out. After pouring out a predetermined amount of contents, the upper lid 4
Is closed, the reseal is performed between the pouring cylinder 15 and the inner plug 44, and the contents can be shielded from the outside air and stored.

When the contents are used up and the container and the cap are separately discarded, the upper lid 4 is opened, the upper lid 4 is grasped with a finger, and this is pulled outward. This tensile force is effectively transmitted as a shearing force to the score 6 via the hinge 3, so that the score 6 is sheared, and the upper lid 4 is further pulled in the circumferential direction to break the bridge 26 and separate the outer wall 23. This releases the restraint on the outer wall 23 and the inner wall 24
Of the container neck 5 by allowing the
And the engagement portion 21 of the inner wall is released, and the cap body can be easily removed from the container neck.

In the present invention, the uneven portion of the outer wall 23 and the uneven portion of the inner wall 24 are small enough to prevent the relative rotation or the spread of the two. The height of the wave is from 0.3 to 1.
0 mm, and the pitch in the circumferential direction is preferably in the range of about 2 to 4 mm.

On the other hand, the residual thickness of the skirt tear score 6 varies depending on the size of the cap and the material of the resin, but is generally appropriate to be about 0.4 to 0.7 mm on average.

In the cap of this embodiment, as shown in FIG. 3, the circumferential slit 25 can be provided on the entire circumference of the skirt portion, but as shown in FIG. It is preferable that the connecting portion 28 be provided. By leaving the connecting portion 28, the bridge 26
Then, by further lifting the upper lid 4, the entire cap body can be removed from the container neck. In FIG. 1, a connecting portion 28 is formed on the clockwise side of the score 6 for skirt tearing.
Circumferential slit 2 so that it passes through the hinge side on the counterclockwise side of
5 is formed, and after the score 6 is broken, the orientation is made so that the cutting of the bridge 26 proceeds from the hinge side, so that the cap removal does not fail. From the viewpoint of easy removal of the cap body, the length of the circumferential score 25 is suitably about 60 to 90% of the entire circumference of the skirt.

[Second Embodiment] In the first embodiment described above, the unevenness of the outer wall 23 and the unevenness of the inner wall 24 are provided over the entire circumference of the skirt as the rotation preventing mechanism 7. The portion may be provided in the circumferential slit 25 in a partially divided manner, and the installation position is not limited to the above-described example. In the example shown in FIG. 5, the basic configuration of the cap is the same as that of the first embodiment. However, in the second embodiment, the uneven portion of the outer wall 23 and the uneven portion of the inner wall 24 are partially formed around the periphery of the skirt. It is divided and formed.

That is, in this specific example, the corrugated uneven portion of the outer wall 23 and the corrugated uneven portion of the inner wall 24 are provided close to at least one side of the skirt tear score 6. The slit 25 other than the matching unevenness portion 79
Has a smooth normal circumferential slit. These matching irregularities 79 are engaged in the circumferential direction when the cap is plugged, and effectively prevent the score 6 from spreading in the circumferential direction when the cap is plugged. In this case, the circumferential slit 25 shown in FIG.
Is formed by engraving it on the skirt using a cutter 100 shown in FIG.

[Embodiment 3] In the embodiment shown in FIG. 7, the basic configuration of the cap is the same as that of the embodiment 2, but in this embodiment, a plurality of corrugations are used instead of a single Is formed. These consistency unevenness portions 7
Even if 9c is a single piece, it can be engaged in the circumferential direction when the cap is plugged, and can prevent the score 6 from spreading in the circumferential direction when the cap is plugged. In this case, it is preferable to provide the skirt tearing score 6 on the opposite side of the hinge 3 so as to leave the connecting portion 28 between the outer wall 23 and the inner wall 24. By leaving the connecting portion 28, it is possible to prevent the spread in the circumferential direction from being concentrated on the skirt tear score 6. FIG.
The slit 25 shown in FIG.
Is formed by engraving this on the skirt.

[Embodiment 4] In the embodiments shown in FIGS. 9, 10 and 11, the basic structure of the cap is the same as that of the embodiment 1, but the opening / closing mechanism of the upper lid 4 is different from that of the above embodiment. ing. A pouring cylinder (circumferential projection) 15 is provided on the upper surface of the top plate portion 10 so as to surround the planned opening portion 12, and inside the skirt portion 42 of the upper lid 4,
The inner plug 44 sealingly engaged with the pouring cylinder 15 of the cap body is formed in the same manner as in the first embodiment.

However, in the cap of this embodiment,
The cap body 1 and the upper lid 4 are not connected by a hinge,
Instead, they are provided so that they can be fastened and unfastened with screws. That is, as shown in FIG. 11, a female screw 48 is formed on the inner surface of the skirt portion 42 of the upper lid 4, and a male screw 19 for fastening is also formed on the inner cylinder 18 for locking the upper lid of the cap body 1. It is provided so that it can be fastened and unfastened by turning the screws 48 and 19. A knurl groove 49 is also formed on the outer periphery of the upper lid skirt portion 42 to facilitate gripping of the upper lid 4.

The skirt portion 2 of the cap comprises an outer wall 23 and an inner wall 24 which are concentrically divided by a circumferential slit 25. The inner wall 24 has an engagement portion 21 with the container opening 5 (see FIG. 12) formed on the inner surface. The inner wall 24 of the skirt portion allows the inner wall 24 to easily spread outward. In order to achieve this, a notch 27 extending in the axial direction beyond the engaging portion 21 from the lower end at intervals in the circumferential direction is provided, and the inner surface of the container neck 5 is provided on the inner surface of the top plate 10. The formation of the inner ring 16 that engages the same as in the first to third embodiments.

In the cap of this embodiment, the outer wall 23 and the inner wall 24 are connected by a breakable bridge 26 provided below the circumferential slit 25. In the circumferential slit 25, the convex portions 77 and the concave portions 78 are alternately arranged in a wave shape, and the outer side wall 23 and the inner side wall 24 can be engaged in the circumferential direction through these concave and convex portions. The relative rotation between the outer side wall 23 and the inner side wall 24 at the time of plugging is suppressed.

A vertical skirt tear score 6 is formed on the outer wall 23, and a skirt tear start knob 65 is provided on the upper portion of the outer wall 23 adjacent to the skirt tear score 6. ing. Knob 65
The shape is not particularly limited, but is preferably provided so as to protrude above the upper portion of the outer wall 23 in an arc shape along the outer surface of the outer wall 23. As shown in FIG. 10, a slit or a through hole 66 is provided in a portion of the outer wall 23 where the knob 65 and the skirt tear score 6 are close to each other in order to easily push down the knob 65 with a finger. Is preferred. In the specific examples shown in FIGS. 10 and 11, the skirt tearing score 6 is provided vertically vertically, but the shape is not particularly limited as long as this score is provided vertically as a whole. For example, they may be provided obliquely in an oblique direction, or may be provided in a stepwise manner.

In the cap of this embodiment, the container neck 5 is plugged with the upper lid 4 screwed into the cap body 1 and closed. At the time of this stoppering, the radially inwardly protruding portion 21 provided on the inner side wall 24 of the skirt climbs over the bead 51 of the container neck portion 5 and engages with the concave portion 52, so that the cap is fixedly held and sealed to the container neck portion. Done. When the projection 21 of the inner wall climbs over the bead 51 of the container neck 5, the inner wall 24 expands in the circumferential direction, and accordingly the outer wall 23 also expands in the circumferential direction.
The rotation preventing mechanism 7 that engages between the outer wall 23 and the outer wall 23 to prevent relative rotation is provided, so that the skirt tear score 6 is prevented from being concentratedly spread in the circumferential direction. The accidental breakage of the score 6 can be effectively prevented.

When using the contents, the purchaser of the container with a cap turns the top cover 4 to remove it from the cap body 1, pours the opening tab 13, breaks the score 11, and breaks the score. 12, an opening is formed, and the liquid in the container is poured out through the opening and the pouring tube 15. After pouring out a predetermined amount of contents, the upper lid 4
Is screwed in to close the cap body, reseal is performed between the pouring cylinder 15 and the inner plug 44, and the contents can be shielded from the outside air and stored.

When the contents are used up and the container and the cap are separated and discarded, the upper lid 4 is removed if necessary, and the skirt tearing start knob 65 is pushed down with a finger outward. This shears the score 6 and then grips the knob 65 with a finger and pulls outward to break the bridge 26 and cut off the outer wall 23, thereby releasing the restraint on the outer wall 23 and removing the inner wall 24 Of the cap can be disengaged outwardly, whereby the engagement between the container neck 5 and the engaging portion 21 of the inner wall is released, and the cap body can be easily removed from the container neck.

In the present invention, the resin used for molding the cap includes various plastics, for example, low-, medium-
Or high-density polyethylene, linear low-density polyethylene,
Polypropylene, thermoplastic polyester, polyamide,
Styrene-based resins, ABS resins and the like can be mentioned.

Among the hinge caps of the present invention, those shown in Examples 1 to 3 use the above-mentioned resin and are usually formed by injection molding.
The cap body 1 and the upper lid 4 are hinged by compression molding or the like.
In general, after this forming step, a cut is made between the outer wall 23 and the outer inner wall 24 with a cutter or the like to form the bridge 26 or the bridge 26 and the connecting portion. It is manufactured by forming a slit 25 in a portion other than 28. In the case of Example 4, the cap body 1 is manufactured by the same method as described above, and the upper lid 4 is manufactured separately by injection molding, compression molding, or the like.

[0058]

According to the present invention, there is provided a double wall structure comprising a top plate and a skirt, wherein the skirt is separated into an inner wall and an outer wall by a circumferential slit. In a separable and disposable cap in which an engagement projection with the container neck is formed on the inner surface and a score for vertical skirt tearing is formed on the outer wall, between the outer wall and the inner wall, By providing an engagement mechanism that engages and suppresses relative rotation between the two, accidental breakage when plugging the score for removing the skirt portion provided on the skirt portion of the cap body is effectively prevented. Moreover, it is easy to remove by breaking the score after use,
It has the advantage of being superior in separation and disposal. Further, in the step of engraving the circumferential slit for separating the outer wall and the inner wall from the skirt portion, the rotation suppressing engagement mechanism can be formed, so that no special step is required, and the manufacturing is easy and the productivity is improved. Also has the advantage of being superior.

[Brief description of the drawings]

FIG. 1 is a top view illustrating an example (Example 1) of a cap according to the present invention with an upper lid opened.

FIG. 2 is a sectional view of the cap of FIG. 1;

FIG. 3 is a bottom view showing the cap of FIG. 1 with an upper lid closed.

FIG. 4 is a top view showing a cutter shape used for molding the cap of FIG. 1;

FIG. 5 is a bottom view showing another example (second embodiment) of the cap of the present invention with the upper lid closed.

FIG. 6 is a top view showing a cutter shape used for forming the cap of FIG. 5;

FIG. 7 is a bottom view showing another example (Example 3) of the cap of the present invention with the upper lid closed.

FIG. 8 is a top view showing the shape of a cutter used in the molding of FIG. 7;

FIG. 9 is a top view showing another example (Example 4) of the cap of the present invention with the upper lid closed.

FIG. 10 is a side view of the cap of FIG. 9;

FIG. 11 is a partial cross-sectional side view of the cap of FIG. 9;

FIG. 12 is a side sectional view showing a state in which the cap of FIG. 1 is fitted to a container mouth.

FIG. 13 is an enlarged sectional view showing a score for skirt tearing in the hinge cap of FIG. 1;

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Mitsuo Kumada 2-12 Nagatoro, Hiratsuka-shi, Kanagawa F-term in Hiratsuka Plant, Japan Crown Cork Co., Ltd. 3E084 AB01 BA03 CA01 CB01 CB02 CB04 CC03 DA01 DB01 DB09 DB13 DB17 DC03 FA03 FA09 FC07 GA06 GA08 GB06 GB08 GB12 GB17 KB01 LA03 LA18 LB02

Claims (10)

[Claims] 1. A double-walled structure comprising a top plate and a skirt, wherein the skirt is divided into an inner wall and an outer wall by a circumferential slit, and the inner wall has a container neck on the inner surface side. A separable and disposable cap having a vertical skirt tear score formed on the outer side wall, wherein the outer side wall and the inner side wall are engaged with each other so as to engage with each other. A separable and disposable cap provided with an engagement mechanism for suppressing an excessive rotation. 2. The cap according to claim 1, wherein the remaining thickness of the skirt tear score portion has a thickness distribution in which the upper portion is thinner and the lower portion is thicker. 3. The cap according to claim 1, wherein the rotation suppressing engagement mechanism is an engagement portion between an outer wall and an inner wall that has irregularities in a radial direction and abuts in a circumferential direction. 4. The rotation suppressing engagement mechanism according to claim 1, wherein at least a part of the rotation suppressing engagement mechanism is formed by engraving a circumferential slit having irregularities in a radial direction on a skirt portion. The cap according to any one of the above. 5. The cap according to claim 1, wherein the outer side wall and the inner side wall are connected via at least a plurality of breakable bridges. 6. A notch extending upward from the lower end of the inner wall past the projection for engaging with the container neck from the lower end, and is provided at intervals in the circumferential direction. A cap according to any one of claims 1 to 5. 7. An upper lid is connected to the outer wall via a hinge, and a locking portion of the upper lid is provided on the top plate. The cap described. 8. The cap according to claim 7, wherein a skirt tear score is provided on the hinge in a circumferentially outward direction and in the vicinity of the hinge. 9. The cap according to claim 1, wherein a screw portion is formed on the top plate portion to lock the upper cover so that the upper cover can be opened and closed. 10. The cap according to claim 9, wherein a score tearing start knob is provided at an upper portion of the outer wall adjacent to the skirt tearing score.