JPH11130113A - Plastic cap having separation feature - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic cap having separation feature wherein a cap body can be easily removed from a container mouth without providing a breaking line such as a score on the cap body. SOLUTION: A first ratchet 8 is formed on an external face of a skirt 6, while a horizontal flange 7 protruding outward horizontally is formed at a lower end of the skirt. An upper lid 2 includes a thread 16 for screw-fastening a cap body 1 into an internal face of a cylindrical side wall, while a circular band 31 is provided via a breakable bridge 30 at a lower end of the cylindrical side wall. A second ratchet 32 is formed on an internal face of the circular band, wherein while the upper lid is screw-engaged with the cap body, an entire periphery of the external face of the skirt is covered by the circular band, and also the first and second ratchets are formed in a relation that rotation of the circular band in a direction for closing is allowed, but rotation in a direction for opening is limited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic cap having a sorting function and tamper-evident (TE) property, and more particularly, to a cap body fitted and fixed to a container mouth, and a screw. The present invention relates to a plastic cap which comprises an upper lid detachably provided on the cap main body in some cases, and which can easily remove a used cap (cap main body) from a container mouth.

[0002]

2. Description of the Related Art Plastic caps comprising a cap body and an upper lid as described above are well known and widely used in containers for various seasonings, beverages and the like. By the way, recently,
Along with the TE property, there is a demand for the ability to separate and discard containers and caps in terms of resource reuse, waste disposal, and the like. In a plastic cap of the type described above, the cylindrical side wall of the cap body is fitted and fixed to the mouth of the container by stoppering, so that it is difficult to remove it, and it is desired to improve the sorting and disposal properties.

[0003] Various plastic caps have been proposed for the purpose of improving the separation and disposal properties.
In Japanese Patent No. 35451, a tab is provided at the lower end of the outer surface of the cylindrical side wall portion of the cap main body, and continuously from the base of the tab above the engagement projection with the container opening on the inner surface of the cylindrical side wall portion. A plastic cap is disclosed that has a score that extends and extends circumferentially at a portion above the engagement projection. This cap, by holding the tab by hand and tearing the score, breaks the projection for engagement with the container mouth formed on the inner surface of the cylindrical side wall of the cap main body, without using a special tool, The cap can be easily removed from the mouth of the container by hand, and the separation and disposal properties are extremely good.

[0004]

However, in the above-mentioned prior art cap, since the score is formed on the cap main body, the score of the cap main body is required at the time of the plugging operation for fitting the cap main body into the container mouth. Often, there is a trouble that the wire breaks. In addition, a general consumer may inadvertently break the score before discharging the contents of the container.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a separation device which has a TE property and allows the cap body to be easily removed from the container mouth without providing a break line such as a score in the cap body. It is to provide a plastic cap having a function. Another object of the present invention is to
It is an object of the present invention to provide a plastic cap that prevents a general consumer from accidentally removing a cap body from a container mouth before use, that is, before discharging contents.

[0006]

According to the present invention, there is provided a plastic cap comprising a cap body fitted and fixed to a container mouth and an upper lid detachably fixed to the cap body by screw engagement. The cap body includes a top plate portion, and a skirt portion hanging down from a periphery of the top plate portion. The top plate portion has an opening forming area for discharging contents and a note formed around the forming area. A first ratchet is formed on an outer surface of the skirt portion, and a horizontal flange portion is formed at a lower end of the skirt portion so as to protrude outward in the horizontal direction. The upper lid is provided with a thread for screwing the cap body on the inner surface of the cylindrical side wall, and an annular band is provided at a lower end of the cylindrical side wall via a breakable bridge. Is provided, and said annular A second ratchet is formed on the inner surface of the cap, and in a state where the upper lid is screw-engaged with the cap body, the entire circumference of the outer surface of the skirt portion of the cap body is covered by the annular band, and The first ratchet and the second ratchet are formed so as to permit rotation of the annular band in the closing direction, but are formed in such a relationship as to limit rotation in the opening direction. A plastic cap is provided.

In the present invention, since the annular band provided on the upper lid functions as a reinforcing member for the skirt portion of the cap body, the skirt-like side wall can be made thin, and as a result, the skirt portion has a score or the like. The cap body can be easily removed from the container opening without forming a break line.

For example, in the cap of the present invention, the skirt portion of the cap body is completely covered by an annular band provided on the upper cover in a state where the upper cover is screwed to the cap body. That is, when the cap is fitted into the container opening by tapping, the skirt portion of the cap body expands outward and comes into close contact with the inner surface of the annular band, and is protected by the annular band. Therefore, even when the skirt portion of the cap body is made as thin as possible to be easily bent, the skirt portion does not break at the time of plugging, and is firmly fixed to the container mouth, and the sealing property is impaired. Nor.

[0009] In the above cap, the screw engagement between the upper lid and the cap main body can be easily performed by putting the upper lid on the cap main body and rotating in the closing direction. On the other hand, when the upper lid screwed to the cap body is rotated in the opening direction, rotation of the annular band in the opening direction is restricted by the first and second ratchets. Is broken, only the upper lid rotates and is removed from the cap body, and the annular band remains in the cap body. In this state, a content discharging opening is formed in the top plate portion of the cap body, and the content is discharged through this opening. The upper lid separated from the annular band, by itself, is repeatedly used for resealing the cap body.

When the container is completely discharged and the container is discarded, the annular band is first removed from the cap body, but the annular band is not connected to the cap body,
Since the two members are merely in close contact with each other, the removing operation can be easily performed. In addition, if a notch is formed at the lower end of the annular band, a coin or the like can be inserted into the notch and the annular band can be lifted upward, thereby making it easier to remove the annular band. Can be. After removing the annular band, the cap body is removed from the container mouth. In the present invention, the skirt portion of the cap body can be formed to be extremely thin and easily bent, so that this removal can be performed very easily. For example, after the upper lid is re-engaged with the cap main body, the cap main body can be easily removed from the container opening by lifting the upper lid. In addition, the horizontal flange provided at the lower end of the skirt has a handle function, and a finger or a nail can be hooked on the horizontal flange and the skirt can be easily removed by rolling up the skirt. it can.

As described above, according to the present invention, it is possible to easily remove the cap body from the container opening without providing any break line such as a score in the cap body. This is extremely advantageous in terms of separation and disposal. In the present invention, unless the annular band and the upper lid are separated, the upper lid cannot be opened,
If the two are separated, this indicates that the lid has been opened. Therefore, the cap of the present invention also has TE property.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to specific examples shown in the accompanying drawings. FIG. 1 is a perspective view showing the entire cap of the present invention, FIG. 2 is an exploded perspective view of the cap of the present invention, and FIG. 3 is a view showing a side cross section of the cap of FIG. FIG. 4 is a perspective view showing the upper lid of the cap of FIG. 1, and FIG. 5 is an explanatory view for explaining a method of removing the annular band from the cap body.

As shown in FIGS. 1 to 4, the plastic cap of the present invention comprises a cap body 1 and an upper lid 2, and the cap body 1 is, as shown in FIG. It is fitted and fixed to the container mouth 50 by tapping.

The cap body 1 includes a top plate 5 and a top plate 5.
And a skirt portion 6 hanging down from a peripheral edge of the skirt portion, and a horizontal flange 7 is formed at a lower end of the skirt portion 6. Further, a first ratchet 8 is formed on the outer surface of the skirt portion 6 from the lower portion to the horizontal flange 7. The function of the first ratchet 8 will be described later. Referring to FIG. 3, an inner ring 10 is formed on the inner surface of top plate portion 5.
The upper end of the container mouth 50 is fitted in the space between the skirt 6 and the skirt 6. A locking projection 11 is formed on the inner surface of the skirt portion 6, and the locking projection 11 is engaged with the outer surface of the container opening 50, so that the cap main body 1 holds the container opening 50. It is fixed firmly. A score 12 for forming an opening for discharging the content liquid is formed further inside the inner ring 10.
A pull ring 13 is formed on the outer surface side of the section defined by 2 (the pull ring 13 is omitted in FIG. 2). That is, the score 12 is broken by pulling with the pull ring 13, and an opening for discharging the content liquid is formed in the top plate 5. An annular projection 15 for pouring is formed on the outer surface of the top plate 5 so as to surround the score 12. The annular projection 15 serves as a guide for the liquid to be poured out, and the annular projection 15 allows the liquid to be smoothly poured out from the content liquid outlet formed by the breakage of the score 12. Further, the annular projection 1
An outer cylindrical portion 16 is formed on the outer side of 5, and a screw 16 a for engaging the upper lid is provided on the outer surface of the outer cylindrical portion 16. That is, the upper lid 2 is fixed to this portion by screwing.

The upper lid 2 is provided with a top surface 20 and a cylindrical side wall 21 similarly to those known per se. On the inner surface of the cylindrical side wall 21, a thread 21a for screwing with the cap body 1 is provided. Is formed. That is, the upper cover 2 is fixed to the cap body 1 by the screw 21a being screw-engaged with the screw 16a formed on the outer cylindrical portion 16 described above. On the inner surface of the top surface 20, there is provided an annular projection 2 which can be in close contact with the inner surface of the annular projection 15 formed on the top plate 5 of the cap body 1.
2 are formed. The annular projection 22 and the annular projection 15
The sealing property after the opening for discharging the content liquid is formed in the top plate portion 5 of the cap body 1 by the close contact.

Referring particularly to FIGS. 1, 2 and 4, in the present invention, an annular band 31 is provided at the lower end of the cylindrical side wall 21 of the upper lid 2 via a breakable bridge 30.
This annular band 31 is located just over the outer surface of the skirt portion 6 of the cap body 1 when the upper lid 2 is screwed to the cap body 1 and the lower end of the annular band 30 is shown in FIG. As a result, the skirt 6 is in close contact with the upper surface of the horizontal flange 7.

As is clearly shown in the exploded perspective view of FIG. 2, a first ratchet 8 is provided from a lower portion of the outer surface of the skirt portion 6 to the horizontal flange 7.
A second ratchet 32 is provided below the inner surface of the annular band 31. Further, at the lower end of the annular band 31, at least one notch 33 is provided.

In the present invention, the first ratchet 8 and the second ratchet 32 are formed so as to permit rotation of the annular band 31 in the closing direction, but restrict rotation in the opening direction. . That is, when the upper cover 2 is screwed to the cap body 1, the upper cover 2 and the annular band 31 rotate together in the closing direction and are attached to the cap body 1, and the annular band 31 is formed around the entire outer surface of the skirt portion 6. Is located on the horizontal flange 7 so as to cover. Therefore, by capping in this state, the cap can be fitted and fixed to the container opening 50. On the other hand, when the upper cover 2 screwed to the cap body 1 is rotated in the opening direction, the first ratchet 8 and the second ratchet 32 come into contact with each other, and the rotation of the annular band 31 in the opening direction is restricted. Will be. That is, only the upper lid 2 rotates in the opening direction, and the bridge 30 is broken. As a result, the upper lid 2 is separated from the annular band 31 and is removed from the cap body 1 to be opened. It remains at a predetermined position on the cap body 1. Therefore, in this state, the pull ring 13 is pulled up to break the score 12, and an opening for discharging the content liquid is formed in the top plate 5, and the content is discharged through this opening.

The cap body 1 is separated from the upper lid 2 and
5, the coin 34 is inserted into the notch 33, and the annular band 31 is pushed up using the horizontal flange 7 as a fulcrum using the principle of leverage, as shown in FIG. It can be removed from the cap body 1. As can be understood from this, the notch 33 is preferably large enough to insert a coin 34, and a plurality of notches 33 may be formed.
Usually, it is sufficient to provide one. In the present invention, since the annular band 31 is only in close contact with the cap body 1 and is not joined, even when the notch 33 as described above is not formed, Can be removed from the cap body 1. Although the pull ring 13 is shown in FIG. 5, the pull ring 13 is removed when this operation is actually performed.

When the annular band 31 is detached from the cap body 1 as described above, the horizontal flange 7 is exposed to the outside. The finger or nail is used as a handle to easily turn the skirt portion 6 of the cap body 1. By raising
The cap body 1 can be removed from the container mouth 50. The cap body can also be removed by screwing the upper cover 2 to the cap body again and lifting the upper cover 2 in this state.

In the present invention, when the cap body 1 is plugged into the container mouth, the skirt portion 6 bulges outward and is closely attached to the annular band 31 to be protected. Therefore, the skirt portion 6 can be made as thin as possible, and a sufficient sealing property and strength are guaranteed by the double wall structure of the skirt portion 6 and the annular band 31. For example, the thickness of the skirt portion 6 is 1.5 mm in a normal cap, although it depends on the material.
As described above, in the present invention, the thickness of the skirt portion 6 is set to 0.5.
It can be as thin as about 1.0 mm. Therefore, the skirt portion 6 having the horizontal flange 7 can be easily turned up, and the cap body 1 can be easily connected to the container opening 5.
It is easy to remove from zero. Furthermore, skirt part 6
Since it is not necessary to provide a score for the plug, there is no trouble such as breakage of the score when plugging.

Further, according to the present invention, when the upper lid 2 is opened, the bridge 30 is always broken and the annular band 31 is separated from the upper lid 2. That is, it is understood that the cap of the present invention can know the fact of opening by breaking the bridge 30, and also has tamper-evident properties.
In the illustrated example, the screw 16a of the cap body 1 that is screwed with the screw 21a of the upper lid 2 is formed on the outer surface of the outer cylindrical portion 16 located outside the annular protrusion 15 for pouring.
Without forming such an outer cylindrical portion 16, the annular projection 1 for pouring is used.
The thread 16a may be formed on the outer surface of the fifth member.

In the present invention, the cap body and the upper cover described above are made of various plastics, for example,
It can be easily produced by integral molding such as injection molding or compression molding using medium- or high-density polyethylene, linear low-density polyethylene, polypropylene, thermoplastic polyester, polyamide, styrene resin, ABS resin, or the like.

[0024]

According to the present invention, the cap can be easily removed from the mouth of the container without forming a break line such as a score in the cap body, which is extremely advantageous in terms of sorting and disposal. is there. Further, the cap of the present invention also has tamper-evident performance indicating an opening history.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entire cap of the present invention.

FIG. 2 is an exploded perspective view of the cap of the present invention.

FIG. 3 is a diagram showing a side cross section of the cap of FIG. 1 together with a container mouth.

FIG. 4 is a perspective view showing an upper lid of the cap of FIG. 1;

FIG. 5 is an explanatory diagram for explaining a method of removing an annular band from a cap body.

[Explanation of symbols]

 1: Cap body 2: Top cover 5: Top plate 6: Skirt 7: Horizontal flange 8: First ratchet 30: Bridge 31: Annular band 32: Second ratchet 33: Notch

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoichi Tsujiguchi 2-12 Nagatoro, Hiratsuka-shi, Kanagawa Prefecture Inside the Hiratsuka Plant of Japan Crown Cork Co., Ltd. (72) Inventor Yasunori Yamazaki 2-12 Nagatoro, Hiratsuka-shi, Kanagawa Japan Nippon Crow Ncork Corporation Hiratsuka Factory

Claims (3)

[Claims] 1. A plastic cap comprising: a cap main body fitted and fixed to a container mouth; and an upper lid detachably fixed to the cap main body by screw engagement, wherein the cap main body includes a top plate, A skirt portion hanging down from the periphery of the top plate portion, wherein the top plate portion has an opening formation region for content discharge and an annular protrusion for discharging formed around the formation region. A first ratchet is formed on an outer surface of the skirt portion, and a horizontal flange portion is formed at a lower end of the skirt portion so as to protrude outward in a horizontal direction; A thread for fastening the cap body with a screw is provided on the inner surface of the portion, and at the lower end of the cylindrical side wall portion, an annular band is provided via a breakable bridge portion. On the inside, a second ratchet When the upper lid is screwed into the cap body, the entire circumference of the outer surface of the skirt portion of the cap body is covered with the annular band, and the first ratchet and the second ratchet are connected to each other. The ratchet is a plastic cap having a separating function, which is formed so as to permit rotation of the annular band in the closing direction but restrict rotation in the opening direction. 2. The plastic cap according to claim 1, wherein a notch is formed at a lower end of the annular band. 3. The plastic cap according to claim 2, wherein the notch has a size such that a coin can be inserted.