JPH11165754A - Plastic cap easy in differential disposal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic cap easy in differential disposal so that a cap body can be easily detached from a container mouth part without providing a breaking line such as a score on the cap body. SOLUTION: A plastic cap comprises a cap body 1 to be fitted and fixed to a container mouth part, an upper lid 2 provided on the cap body 1 in an attachable/detachable manner, and an annular band 3 separate from the cap body 1 and the upper lid 2, the cap body 1 comprises a top plate part and a skirt part 6 suspended from a peripheral edge of the top plate part, the skirt part 6 comprises an annular base part continuous to the top plate part, and an annular skirt part 8 which is located at a lower side of the annular base part and provided with a projection for engagement with an outer surface of the container mouth part on an inner surface, and an annular band 3 is fitted and fixed to the annular skirt part 8 so as to cover the outer surface of the annular skirt part 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic cap which can be easily separated and discarded from a container. The present invention relates to a plastic cap comprising a freely provided upper lid and an annular band separate from the cap body and the upper lid.

[0002]

2. Description of the Related Art Plastic caps composed of a cap body fitted and fixed to a container mouth and an upper lid removably provided on the cap body by hinge connection or screwing are well known, and include various seasonings, beverages and the like. Widely used in containers. By the way, recently, in terms of resource reuse, garbage disposal, and the like, there is a demand for separate disposal of containers and caps. In the above-mentioned type of plastic cap, since the cap body is fitted and fixed to the mouth of the container by stoppering, it is difficult to remove the cap body, and improvement in sorting and disposal is desired.

[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.

Accordingly, an object of the present invention is to provide a plastic cap which can be easily separated and discarded so that the cap main body can be easily removed from the container mouth without providing a break line such as a score in the cap main body. It is in. Another object of the present invention is to provide a plastic cap which prevents a general consumer from accidentally removing a cap body from a container mouth before use, that is, before pouring out contents. .

[0006]

According to the present invention, there is provided a cap body fitted and fixed to a container mouth, an upper lid detachably provided on the cap body, and an annular body separate from the cap body and the upper lid. And a cap body,
A top plate portion and a skirt portion hanging down from the periphery of the top plate portion. The skirt portion is connected to an annular base portion connected to the top plate portion, and is positioned below the annular base portion and has an inner surface connected to an outer surface of the container opening. An annular hem having a joint projection, wherein the annular band is fitted and fixed to the annular hem so as to cover an outer surface of the annular hem.

The plastic cap of the present invention uses an annular band separate from the cap body and the upper lid, and this annular band is fitted and fixed to a thin annular skirt itself, and the annular skirt is attached to the outer surface of the container opening. An important feature is that it is firmly held down. That is, the annular band that presses the annular skirt located at the lower part of the cap body skirt against the outer surface of the container mouth is a member molded completely separately from the cap body and the upper lid, and the cap body and the upper lid are also formed on the upper lid. Also not connected. Moreover, the annular skirt of the cap body skirt and the annular band are merely fitted, and there is no need to use any special engagement means between them. Therefore, by pushing down the annular band, the annular skirt can be released from the annular band. On the other hand, the annular skirt has a projection on its inner surface for engaging with the outer surface of the container mouth, and in a state where the annular band is provided, the annular hem is located between the outer surface of the container mouth and the annular band. The cap body is firmly held between the cap body and the container mouth, so that the cap body is firmly held on the container mouth and has a sufficient sealing property. There is no escape. The cap of the present invention is plugged into the container mouth in a state where the above-mentioned annular band is fitted and fixed to the annular skirt of the cap body skirt portion, but the annular band does not fall off from the annular skirt before the capping. In this way, it is also possible to provide an engaging means for lightly locking the annular band.

In the present invention, the annular skirt is
Since the wall can be made thinner by the above-mentioned annular band, the fitting force between the cap body and the container mouth portion is significantly reduced in a state of being released from the annular band. Therefore, in a state where the annular band is pushed down to release the annular skirt, the cap body can be easily removed from the container mouth and discarded by pulling up the cap body or by rolling up the annular skirt. . Further, since the pressed annular band is merely a ring, it can be easily removed from the container opening after the cap main body is removed and discarded.

As described above, according to the present invention using the annular band separate from the cap body and the upper lid, the cap body can be easily removed from the container opening without impairing the sealing performance of the cap. . Further, in the present invention, the cap body skirt portion is not provided with any breaking line such as a score or a knob for tearing. Therefore, there is no possibility that a general consumer may erroneously tear the score or the like before pouring out the contents of the container. Also, when the cap body is plugged, the skirt, especially the annular skirt, expands outward, but it closely adheres to the inner surface of the annular band and is guided by the annular band, so that deformation and breakage of the annular skirt are effectively prevented. You.

Further, in the present invention, the annular band is preferably formed of a plastic having a higher hardness than the cap body. That is, by making the annular band high in hardness, the protective function of the annular skirt of the cap body skirt portion can be enhanced, and deformation such as elongation does not easily occur. Can be easily pushed down.

The outer diameter of the annular skirt may be the same as the outer diameter of the annular base, but it is preferable that the outer diameter of the annular base is set smaller than the outer diameter of the annular base by the thickness of the annular band. That is, the annular band is fitted and fixed to the annular skirt,
According to the above, the outer surface of the annular band is located on substantially the same plane as the outer surface of the annular base located thereon, so that the appearance of the cap becomes extremely good and the commercial value increases. . In this case, it is preferable to form a cutout at the lower end of the annular base or the upper end of the annular band, the cutout being large enough to insert a coin or the like. That is, since the coin can be inserted into the notch and the ring-shaped band can be easily pushed down, the cap can be easily removed from the container opening.

Further, according to the present invention, a part of the annular skirt can be formed to be thin from the lower end thereof upward to at least the same height as the part where the engaging projection is formed. By forming such a thin portion, if the annular band is pushed down to release the skirt from the annular band, the cap body can be easily removed from the container opening.

In this aspect, it is preferable that the thin portion is formed at a plurality of locations at intervals in the circumferential direction, and the thin portion has a projection for engaging with the outer surface of the container mouth. Preferably not. By doing so, it is possible to more easily remove the cap body from the container opening with the annular band released.

The cap of the present invention is particularly advantageously applied to a so-called hinge cap of the type in which the upper lid is hinged to the cap body in any of the above-described embodiments. That is, in this type of cap, the cap main body can be easily removed from the container opening by pulling up the upper lid by hand with the annular band released. In this case, it is preferable that a portion located below the hinge connection portion of the upper lid is not formed with a projection for engaging with the outer surface of the container mouth. Thereby, the upper lid can be pulled up more easily.

[0015]

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 diagram showing a side cross section of a cap of the present invention together with a container mouth, and FIG.
FIG. 3 is an exploded perspective view of the cap of FIG. 1 in a state in which a pouring opening is formed, FIG. 3 is a diagram showing a main part of another example of the cap of the present invention, and FIG. FIG. 13 is an exploded perspective view of another example of a cap in a state where a pouring opening is formed.

As shown in FIGS. 1 and 2, the plastic cap of the present invention comprises a cap body 1, an upper lid 2 hinged to the cap body 1, and a cap body 1.
And an annular band 3 which is fitted and fixed to the ring.

The cap body 1 is closed by a stopper.
0 (see FIG. 1), the cap body 1 includes a top plate portion 5 and a skirt portion 6 hanging down from a peripheral portion of the top plate portion 5. An annular base 7 connected to the top plate 5 and an annular skirt 8 connected below the annular base 7 are provided.

Referring to FIG. 1, an inner ring 10 is formed on the inner surface of the top plate 5 of the cap body 1.
The upper end of the container opening 50 is fitted into the space between the inner ring 10 and the skirt 6. A locking projection 11 is formed on a lower portion of the skirt portion 6, that is, on an inner surface of the annular skirt portion 8, and the locking projection 11 is engaged with an outer surface of the container opening 50, Cap body 1
Is firmly fixed to the container opening 50. 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. 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 protrusion 15 serves as a guide for the liquid to be poured out, and the peripheral protrusion 15 allows the liquid to be smoothly poured out from the content liquid outlet formed by the breakage of the score 12. Outside the annular projection 15, a small projection 16 for locking the upper lid is formed. That is, when the upper lid 2 is closed, the inner surface of the upper lid 2 engages with the small protrusion 16 and the position of the upper lid 2 is fixed in a closed state.

The upper lid 2 is hinged (20) to the periphery of the top plate 5, and when it is turned and closed,
The top plate 5 is completely covered by the upper lid 2. As shown in FIG. 2, the hinge connection portion 20 is connected to the main connection portion 2.
0a and band portions 20b on both sides thereof. That is, by providing such a band 20b, the released state of the upper lid 2 is stably maintained. The upper lid 2 is provided with a top surface 21 and a cylindrical side wall 22 in a manner similar to that known per se, and a convex portion 23 is provided on the inner surface of the cylindrical side wall 22. That is, the upper lid 2 is held in a closed state by the engagement of the projections 23 with the small projections 16 of the cap main body top plate 5. An annular projection 24 is formed on the inner surface of the top surface 21 so as to be in close contact with the inner surface of the annular projection 15 formed on the top plate 5 of the cap body 1. The annular projection 24 and the annular projection 1
Due to the close contact with the cap 5, the sealing property after the opening for discharging the content liquid is formed in the top plate 5 of the cap body 1 is ensured.

In the present invention, the annular band 3 is fitted and fixed outside the annular skirt 8 of the cap body skirt 6, and the annular skirt 8 is completely covered by the annular band 3. Therefore, as shown in FIG. 1, the annular skirt 8 is sandwiched between the container mouth 50 and the annular band 3. Further, the annular band 3 is completely separate from the cap body 1, and the two are not joined but merely adhere to each other. Therefore, the annular band 3 can be detached from the annular skirt 8 of the cap body 1 by pushing it downward. Needless to say, in order to prevent the annular band 3 from falling off before the stopper is inserted into the container mouth, an engaging means such as a small projection for lightly engaging the annular band 3 may be provided.

According to the present invention, the thickness of the annular skirt 8 can be reduced as a whole because the annular band 3 is provided, as can be understood particularly from FIG. That is, even if the annular skirt 8 is made thin, since it is reinforced by the annular band 3, the engagement force with the container mouth 50 is not impaired, and the sealing performance is not impaired. This is because they do not slip through. For example, the above-described cap body 1 is attached to the container mouth 50 by stoppering with the annular band 3 fitted to the annular skirt 8. When it gets over, it swells outward and adheres to the inner surface of the annular band 3,
After the tapping, the annular skirt 8 is firmly pressed down by the annular band 3. Therefore, even if the above-mentioned annular skirt 8 is formed to be thin and the engagement force with the container mouth 50 is weakened, the sealing performance is not impaired. Further, since no weakening line such as a score is formed in the skirt portion 6 of the cap body 1, the skirt portion 6 at the time of plugging is not provided.
There is no risk of breaking. The thin annular skirt 8 is
Since the annular skirt 8 is guided by the annular band 3, there is no possibility that the annular skirt 8 is irregularly deformed at the time of plugging.

Importantly, when the annular band 3 is pushed down and the annular skirt 8 is released from the annular band 3, the engagement force between the annular skirt 8 and the container opening 50 is significantly reduced. Therefore, the cap main body 1 can be easily removed. For example, the upper lid 2 hinged to the cap body 1
The cap body 1 can be removed from the container opening 50 by pulling the cap by hand. Further, in order to remove the cap body 1 more easily, the locking projections 1
It is preferred that 1 is not formed. By doing so, when the upper lid 2 is pulled up, the force concentrates on the portion where the locking projections 11 are not formed, so that the cap body 1 is easily removed from the container opening 50.

In the present invention, as shown in FIG. 1 in particular, the annular base 7 has a larger diameter than the annular skirt 8, and in particular, the thickness of the annular band 3 is larger than that of the annular skirt 8. It can be. With this configuration, when the annular band 3 is attached, the outer surface of the annular band 3 and the outer surface of the annular base 7 appear to be continuous with a smooth surface, so that the appearance of the cap is impaired. And the commercial value can be increased. Of course, it is also possible to make the outer surface of the annular skirt 8 and the outer surface of the annular base 7 uniform.

The above-mentioned annular band 3 is a member completely separate from the cap body 1, and furthermore, its annular skirt 8
, And no special engagement means is provided between them. Therefore, by pushing down the annular band 3, the annular skirt 8 can be released, but in order to easily perform this pushing down, a coin or the like is inserted into the upper end of the annular band 3 as shown in FIG. It is preferable to provide a notch 40 as large as possible. Further, a rib or the like extending in the circumferential direction may be provided on the outer surface of the annular band 3.

Further, instead of providing the notch 40 at the upper end of the annular band 3, such a notch can be provided in the skirt portion 6. This example is shown in FIG. That is, in the example of FIG. 3, the notch 41 is formed at the lower end of the annular base 7 of the skirt 6. It is only necessary to insert a coin or the like into the notch 41 and push down the annular band 3 using the leverage principle.

In the present invention, the above-mentioned cap body 1
And upper cover 2 are made of various plastics, for example, low-, medium-
Or high-density polyethylene, linear low-density polyethylene,
Polypropylene, ethylene-propylene copolymer, thermoplastic polyester, polyamide, styrene resin, AB
Although it is easily manufactured by integral molding such as injection molding and compression molding using S resin or the like, the annular band 3 is preferably formed of a harder material than the cap body 1. That is, the protection function of the annular band 3 is enhanced by forming the annular band 3 with plastic having high hardness,
The annular skirt portion 8 can be firmly fixed, the sealing performance can be improved, and the downward pressing can be easily performed. For example, if the annular band 8 is formed of a soft plastic, not only does it have a low protection function, but it tends to be deformed when it is pushed down, making it difficult to push down. In order to make the annular band 3 high in hardness, for example, a plastic having a higher molecular weight than that of the cap body 1 or a plastic having high hardness itself such as an ethylene-propylene copolymer having a high propylene content is used. 3 may be formed.

In the above-mentioned attached drawings, a hinge cap in which the upper lid 2 is hingedly connected to the cap body 1 is taken as an example. However, the present invention is of course applicable to a cap in which the upper lid 2 is attached to the cap body 1 by screw engagement. Applicable. In this case, for example, a tall cylindrical protrusion is provided in place of the small protrusion 16 of the top plate portion 5 and a screw is formed on the outer surface of the cylindrical protrusion, so that the upper lid can be screwed. it can.

In the present invention, a thin portion may be provided on a part of the annular skirt 8. FIG. 4 shows an exploded perspective view of the cap of this embodiment. In the cap of FIG. 4, as in FIG. 2, a pouring opening is already formed in the top plate portion 5 of the cap body 1. In FIG. 4, a thin portion 30 extending upward from the lower end by a predetermined width is provided at a part of the annular skirt 8 of the cap. That is, in the cap of FIG. 4, by providing such a thin portion 30 on the annular skirt portion 6, the annular skirt portion 3 is pushed down to release the annular skirt portion 8 from the annular band 3, and the cap of the above-described embodiment is used. In exactly the same manner, the cap body 1 can be easily pulled upward, and the cap body 1 can be easily removed from the container opening 50.

In this case, the thin portion 30 has a circumferential width d.
Can be formed in one place by setting large, but usually, as shown in FIG.
It is preferable to form the thin portions 30 at a plurality of locations at regular intervals. In this way, the engaging force between the annular skirt 8 and the container mouth 50 is weakened in a well-balanced manner, so that the cap body 1 can be removed smoothly.

The upper end of the thin portion 30 should extend to the height of the upper end of the locking projection 11 formed on the inner surface of the annular skirt 8 or higher. That is, the thin portion 30
Does not extend to the upper end of the locking projection 11, the engaging force between the annular skirt 8 and the container mouth 50 is not weakened, and therefore,
This is because it becomes difficult to remove the cap body 1 from the container opening 50. The thickness of the thin portion 30, the individual circumferential width d of the thin portion 30, the number of the thin portions 30, and the like facilitate the removal of the cap body 1 according to the size of the cap body 1. It is set as follows. In addition, thin part 3
As long as 0 extends to the upper end of the locking projection 11, the thin portion 30 can be extended to, for example, the annular base 7.

Further, in order to reduce the engaging force between the annular skirt 8 and the container opening 50 as much as possible, and to make the removal of the cap body 1 easier, the inner surface of the thin portion 30 is locked. It is preferable that the projections 11 are not formed. That is, it is preferable to form the locking projections 11 on portions other than the thin portion 30. It is desirable that the thin portion 30 is formed at least below the hinge connecting portion 20. By forming the thin portion 30 at such a position, the cap body 1 can be easily removed from the container opening 50 by holding and pulling the upper lid 2 by hand.

[0032]

The cap of the present invention is detached from the container opening without using a breaking line such as a score, so that a general consumer may accidentally break the score when purchasing the cap. Trouble can be effectively prevented. Also, in order to easily remove the cap body from the container mouth, a thin portion is provided at the annular skirt of the cap body skirt, but such a skirt is firmly pressed against the container mouth by the annular band. Therefore, the sealing performance of the cap is not impaired. Further, since the annular band is a member completely separate from the cap body 1 and can be fitted and fixed to the skirt portion without providing special joining means, to remove the annular band from the skirt portion, push down the annular band. Just do it. When the annular band is pushed down to release the skirt, the operation of removing the cap body from the container mouth can be easily performed, and therefore, it is extremely advantageous in terms of sorting and disposal.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a cap of the present invention together with a container mouth.

FIG. 2 is an exploded perspective view showing a state in which a pouring opening of the cap of FIG. 1 is formed.

FIG. 3 is an enlarged view of a main part of another example of the cap of the present invention.

FIG. 4 is an exploded perspective view of another example of the cap of the present invention.

[Explanation of symbols]

 1: Cap body 2: Top cover 3: Ring band 5: Top plate 6: Skirt 7: Ring base 8: Ring bottom 30: Thin part 40, 41: Notch

Continued on the front page (72) Inventor Yoichi Tsujiguchi 2-12 Nagatoro, Hiratsuka-shi, Kanagawa Prefecture Japan Hiratsuka Cork Co., Ltd. (72) Inventor Yasunori Yamazaki 2-12 Nagatoro, Hiratsuka-shi, Kanagawa Japan Nippon Crown Cork Co., Ltd. Hiratsuka factory

Claims (8)

[Claims] 1. A cap body fitted and fixed to a container mouth, an upper cover detachably provided on the cap body, and an annular band separate from the cap body and the upper cover, wherein the cap body is A top plate portion, and a skirt portion hanging down from a peripheral edge of the top plate portion, wherein the skirt portion is connected to an annular base portion connected to the top plate portion and located below the annular base portion and has an inner surface connected to an outer surface of the container opening. An annular skirt having a joint projection, wherein the annular band is fitted and fixed to the annular skirt so as to cover an outer surface of the annular skirt. 2. The plastic cap according to claim 1, wherein the outer diameter of the annular skirt is smaller than the outer diameter of the annular base by the thickness of the annular band. 3. The plastic cap according to claim 2, wherein a cutout having a size large enough to insert a coin or the like is formed at a lower end of the annular base or an upper end of the annular band. 4. The plastic cap according to claim 1, wherein the upper lid is hinged to the top plate or the annular base of the cap body. 5. The plastic cap according to claim 5, wherein an engagement projection is not formed on a portion of the annular skirt located below the hinge connection portion. 6. The annular skirt portion according to claim 1, wherein a portion of the annular skirt portion is formed so as to be thinner from a lower end thereof to an upper end at least as high as a portion where the engaging projection is formed. Plastic cap. 7. The plastic cap according to claim 6, wherein the thin portions are formed at a plurality of locations at intervals in a circumferential direction. 8. The plastic cap according to claim 7, wherein the thin portion is formed at least in a portion located below the hinge connection portion.