JP4002330B2 - Plastic cap with excellent separation function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plastic cap having an excellent sorting function. More specifically, the present invention comprises a cap main body fitted and fixed to a container mouth portion, and an upper lid that can be freely opened and closed on the cap main body. The main body relates to a plastic cap provided with a top plate part capable of forming an opening for content extraction and a cylindrical side wall extending from a peripheral part of the top plate part.
[0002]
[Prior art]
A plastic cap comprising a cap body and an upper lid as described above is well known and widely used in containers for various seasonings and beverages.
Recently, separate disposal of containers and caps has been required in terms of resource reuse, waste disposal, and the like. In the plastic cap of the type described above, since the cylindrical side wall of the cap body is fitted and fixed to the container mouth portion by stoppering, it is difficult to remove this, and an improvement in the sorting function is desired.
[0003]
Various types of plastic caps have also been proposed for the purpose of improving the separation function. For example, in Japanese Patent Laid-Open No. 6-135451, a tab is provided at the lower end of the outer surface of the cylindrical side wall of the cap body, and the base portion of the tab A plastic cap is disclosed that is provided with a score that extends continuously from the engagement protrusion with the container mouth portion on the inner surface of the cylindrical side wall portion and extends in the circumferential direction at a portion above the engagement protrusion. Has been. Since this cap tears the score by holding the tab by hand, the projection for engagement with the container mouth formed on the inner surface of the cylindrical side wall of the cap body breaks, so without using a special tool, The cap can be easily removed from the container mouth by hand, and the separation function is extremely good.
[0004]
[Problems to be solved by the invention]
However, in the prior art cap described above, the general user who purchased the cap does not know the meaning of the tab provided on the outer surface of the cylindrical side wall. The trouble of pulling and breaking the score occurred. Once the score is broken, the cap can no longer be resealed and loses its function as a cap.
[0005]
Therefore, the object of the present invention is that the score breaking tab is not provided on the outer surface of the cylindrical side wall, so that a trouble that the general user accidentally breaks the score does not occur. It is an object of the present invention to provide a plastic cap having an excellent sorting function capable of removing the cap from the container mouth by hand without using a tool.
[0006]
[Means for Solving the Problems]
According to the present invention, the cap body includes a cap body that is fitted and fixed to the container mouth portion, and an upper lid that is provided by screw engagement with the cap body or that is hingedly connected. In a plastic cap comprising a top plate portion capable of forming a cylindrical side wall extending from a peripheral portion of the top plate portion,
The cylindrical side wall of the cap body is composed of a first cylindrical side wall continuous with the top plate portion and a second cylindrical side wall extending downward from the first cylindrical side wall via a horizontal flange wall. ,
A locking projection that engages with the outer surface of the container mouth is formed on the inner side of the lower end of the first cylindrical side wall,
An opening is formed in the horizontal flange wall between the first cylindrical side wall and the second cylindrical side wall, and the tear tab hinged to the horizontal flange wall is swingably connected to the opening. Is provided,
From both ends of the base portion of the tear tab, first and second tear scores extend at a distance from each other,
The tear tab is raised above the upper surface of the horizontal flange wall when the upper lid is opened, but is pushed into the opening by contacting the lower end of the upper lid when the upper lid is closed. A plastic cap having an excellent sorting function is provided.
[0007]
In the present invention, the score tear tab is not formed on the outer surface of the cylindrical side wall of the cap body, and when the top cover is closed, the tear tab is provided on the horizontal flange wall by the top cover. It is pushed into the opening and cannot be seen from the outside. Therefore, it is impossible to break the score with the tear tab while the top cover is closed, and the cap purchaser can tear the score with the tear tab before removing the top cover. There is no fear of it. Moreover, if the top cover is removed, the contents are left in the container because the contents are poured out by forming the opening for pouring in the top plate portion of the cap body and pouring the contents. In this state, the general user hardly breaks the score with the tear tab.
[0008]
In the cap of the present invention, when the upper lid is opened, the tear tab is released from the pressing by the upper lid, so that it automatically rises and protrudes from the upper surface of the horizontal flange wall. Therefore, by picking the tear tab and tearing the first and second scores, the cap body fixed to the container mouth can be easily removed, and a container such as a bottle can be used without using a special tool. It is possible to dispose of the main body separately, that is, to separate and dispose.
In the present invention, in order to easily perform the score tearing operation, various shapes and the like of these scores can be selected.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on specific examples shown in the accompanying drawings.
FIG. 1 is a view showing a basic structure of a cap body used for a plastic cap employed in the present invention. In FIG. 1, (A) is a top view, (B) is a side view, and (C) is It is a bottom view. 2 is a side sectional view of the cap main body of FIG. 1, and FIG. 3 shows a plastic cap using the cap main body of FIG. 1, that is, the cap main body screwed with the upper lid together with the container mouth portion. 4 is a side sectional view of the plastic cap of FIG.
[0010]
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 formed by a stopper as shown in FIG. The container mouth part 50 is fitted and fixed.
[0011]
The cap body 1 includes a top plate portion 5, a first cylindrical side wall 6 extending from the peripheral portion of the top plate portion 5, a horizontal flange 7 connected to the lower end of the first cylindrical side wall 6, and a tip portion of the horizontal flange. 2 and a second cylindrical side wall 8 extending downward (see particularly FIG. 2).
An annular protrusion 9 is formed integrally with the upper end of the first cylindrical side wall 6, and a thread 9 a for engaging and holding the upper lid 2 is formed on the outer surface of the annular protrusion 9. Yes.
An inner ring 10 is formed on the inner surface of the top plate portion 5, and an upper end portion of the container mouth portion 50 is fitted into a space between the inner ring 10 and the first cylindrical side wall 6. Further, a locking projection 11 is formed on the inner surface of the lower end of the first cylindrical side wall 6, and this cap 11 engages with the outer surface of the container mouth portion 50, so that the cap body 1 It is firmly fixed to the mouth part 50.
A score 12 for forming a content liquid dispensing opening is formed further inside the inner ring 10, and a tab ring 13 is formed on the outer surface side of the portion partitioned by the score 12. . That is, by pulling with the tab ring 13, the score 12 is broken, and an opening for dispensing the content liquid is formed in the top plate portion 5.
[0012]
A circumferential projection 15 is formed on the outer surface of the top plate portion 5 so as to surround the score 12. The circumferential protrusion 15 acts as a guide for the liquid to be poured out, and the circumferential protrusion 15 smoothly pours out the liquid from the content liquid outlet formed by breaking the score 12.
[0013]
In particular, as shown in FIG. 3, a screw thread 20 is formed on the inner surface of the upper lid 2, and this screw thread 20 is engaged with a screw thread 9 a formed on the outer surface of the annular protrusion 9. The upper lid 2 is screwed to the cap body 1. Accordingly, the upper lid 2 is fixed to a portion above the horizontal flange 7.
An annular protrusion 21 is formed on the inner surface of the upper lid 2 so as to be in close contact with the inner surface of the circumferential protrusion 15 formed on the top plate portion 5 of the cap body 1. Due to the close contact between the annular protrusion 21 and the circumferential protrusion 15, the sealing performance after the opening for dispensing the content liquid is formed in the top plate portion 5 of the cap body 1 is secured.
[0014]
In the present invention, as is apparent from FIG. 1A, an opening 30 is provided in the horizontal flange 7, and a tearing tab hinged (31) to the horizontal flange 7 so as to be swingable within the opening 30. 32 is formed. That is, when the upper lid 2 is not closed, the tear tab 32 is held up from the horizontal flange 7 as shown in FIG. 1B or FIG. 4, when the upper lid 2 is closed, the lower end of the upper lid 2 abuts, and as a result, the tear tab 32 is pushed into the opening 30 and is not visible from the outside.
[0015]
Further, from the hinge connecting portion 31, the first and second tearing scores 33a and 33b extend to the second cylindrical side wall 8 with a space therebetween. Among these scores, the first score 33a is slightly inclined and extends to the lower end of the second cylindrical side wall 8, but the second score 33b extends in the circumferential direction of the second cylindrical side wall 8. It extends to. That is, when the upper lid 2 is opened, the tear tab 32 rises from the horizontal flange 7, and by pulling and pulling the tab 32, the first score 33 a is broken and the second cylindrical side wall 8 is divided. At the same time, the breaking of the second score 33b proceeds to some extent. Therefore, the score 33b is torn by holding the tear tab 32 by hand and pulling it in the circumferential direction. Thereby, since the lower part of the horizontal flange 7 is exposed to the outside, the cap body 1 can be easily removed from the container mouth part 50.
In this case, the portions of the scores 33a and 33b located on the horizontal flange 7 may be slits. Further, the second score 33b may extend on the horizontal flange 7, and in this case, it is preferable that the vicinity of the hinge connecting portion 31 is a slit in order to easily tear the second score 33b. .
[0016]
Further, as shown in FIG. 2, the longitudinal ribs directed in the cap axial direction toward the first score 33 a at the lower portion of the second score 33 b on the inner surface of the second cylindrical side wall 8. It is desirable to form a plurality of 35. With such vertical ribs 35, the cylindrical side wall 8 divided by tearing the first part of the first score 33a and the second score 33b can be easily held by hand, The score 33b of 2 can be torn smoothly.
[0017]
The length of the second tearing score 33b extending around the cylindrical side wall 8 is long as long as it can be easily removed from the container mouth 50 of the cap body 1 when the tearing is completed. Is optional and extends, for example, over substantially the entire circumference of the second cylindrical side wall 8, and in some cases, the second score 33b may intersect the first score 33a. However, preferably, as shown in FIG. 1 (A), the second tear score 33b is usually about 270 degrees of the second cylindrical side wall 8 (second cylindrical side wall 8). It may be formed over about 3/4 of the entire circumference. That is, when the second tearing score 33b is formed over substantially the entire circumference of the second cylindrical side wall 8, when the score 33b is broken, the second cylindrical side wall 8 is completely separated from the cap body 1. However, if the score 33b is formed as shown in FIG. 1A, even if the score 33b is broken, the second cylindrical side wall 8 is connected to the cap body 1 and thus is divided. Further, by pulling up the second cylindrical side wall 8, there is an advantage that it can be easily removed from the container mouth portion 50 integrally with the cap body 1.
Furthermore, the first score 33a does not necessarily extend to the lower end of the second cylindrical side wall 8, and the second cylindrical side wall 8 is completely torn and divided along the first score 33a. If possible, the first score 33 a can be terminated in the vicinity of the lower end of the second cylindrical side wall 8.
[0018]
Further, as described above, the locking projection 11 is formed inside the lower end of the first cylindrical side wall 6, and this locking projection 11 is formed on the entire first cylindrical side wall 6. Although it may be formed over the circumference, it is preferably not formed at a position corresponding to the end point of the second score 33b as shown in FIG. In FIG. 1C, a portion where the locking projection 11 is interrupted is indicated by 11a.
That is, after the score 33b is torn, the cap main body 1 is removed from the container mouth portion 50 by pulling the broken second cylindrical side wall 8 upward. At this time, the score 33b is moved to the end point position. This is because if the locking projection 11 engaged with the container mouth portion 50 does not exist, the first cylindrical side wall 6 can be easily lifted up. A plurality of portions 11a where the locking projections 11 are interrupted can be formed. For example, in FIG. 1C, the locking projections 11 are also interrupted on the opposite side of the portion 11a. can do. Thereby, removal of the cap from a container mouth part can be performed easily.
[0019]
According to the present invention, since the tear tab 32 is pushed into the opening 30 formed in the horizontal flange 7 when the upper lid 2 is closed, the tab 32 is held by hand with the upper lid 2 closed. It will be understood that all the scores 33a, 33b are not torn. In addition, there is an advantage that there is no possibility that the tear tab 32 is caught and the scores 33a and 33b are broken when the cap is distributed.
[0020]
Further, according to the present invention, the shape of the two tearing scores 33a and 33b described above can be changed. FIG. 5 below shows a cap main body in which these changes are made.
[0021]
5A and 5B are views showing a cap body used for a cap according to another example of the present invention. FIG. 5A is a top view, FIG. 5B is a side view, and FIG. 5C is a bottom view.
In the example of FIG. 5, both the first and second tear scores 33a and 33b extend to the lower end of the second cylindrical side wall 8 substantially along the cap axis direction, and the tear tabs. By picking 32 by hand and pulling it downward, the two tearing scores 33a and 33b are simultaneously torn, and this portion is peeled off. Therefore, the cap main body 1 can be easily removed from the container mouth portion 50 by raising the lower end of the exposed first cylindrical side wall 6. In this case, the portion of the second score 33a located on the horizontal flange is preferably a slit.
Also in the embodiment described above, the positional relationship between the upper lid 2 and the tear tab 32 is exactly the same as in the example of FIGS. 1 to 4. When the upper lid 2 is closed, the tab 32 is pushed into the opening 30, and the upper lid 2. When the tab is opened, the tab 32 rises from the horizontal flange 7, and the score can be torn by gripping the tab 32.
[0022]
In this embodiment, as shown in the drawing, two openings 30 are provided at positions symmetrical with respect to the cap, and a tear tab 32 and first and second two tears are provided in each of the openings 30. It is preferable to provide scores 33a and 33b for use. That is, by tearing the score at two locations, the cap body 1 can be more easily removed from the container mouth portion 50.
Moreover, it is preferable that the latching protrusion 11 is interrupted on the inner side of the lower end of the first cylindrical side wall 6 corresponding to the portion between the first and second tear scores 33a and 33b (the interrupted portion). Is indicated by 11a). If it does in this way, after peeling off the part between the two tear scores 33a and 33b, the 1st cylindrical side wall 6 can be easily rolled up from a lower end.
[0023]
In the specific examples described above, the upper lid 2 is shown as an example of the type of cap that is attached to the cap body 1 by screwing, but these can also be applied to the hinge cap. In this case, the upper lid 2 can be closed by providing a locking projection on the first cylindrical side wall 6 or the annular projection 9 and locking it with the projection provided on the inner surface of the upper lid 2. The upper lid 2 is hinged to the upper end of the horizontal flange 7, for example. Except for this, the opening 30 is formed in the horizontal flange 7 in the same manner as described above, and the tearing tab 32 that can be swung in the opening 30 may be formed.
[0024]
【The invention's effect】
Thus, according to the present invention, the score tearing tab is pushed into the opening formed in the horizontal flange by the upper lid, and the score is torn with the tab in a state where the upper lid is closed. Therefore, there is no trouble that a general user accidentally pulls the tab and breaks the score before opening the top cover.
In addition, since the two scores formed on the second cylindrical side wall can be easily torn, the cap body can be easily removed from the container mouth without using a special tool. Separation and disposal are very good.
[Brief description of the drawings]
FIG. 1 is a top view, a side view, and a bottom view showing a cap body of a plastic cap of the present invention.
2 is a side sectional view of the cap body of FIG. 1. FIG.
3 is a side cross-sectional view showing a state where an upper lid is attached to the cap body of FIG. 2. FIG.
4 is a side view of the cap shown in FIG. 3;
FIG. 5 is a top view, a side view, and a bottom view showing a cap body according to another embodiment of the present invention.
[Explanation of symbols]
1: Cap body 30: Opening 2: Upper lid 31: Hinge connecting portion 5: Top plate portion 32: Tear tab 6: First cylindrical side wall 33a: First tear score 7: Horizontal flange 33b: Second tear Score 9: annular protrusion 11: locking protrusion

Claims (4)

A cap main body fitted and fixed to the container mouth portion, and an upper lid provided by screw engagement with the cap main body or hinged to the cap main body, the cap main body being capable of forming a content dispensing opening And a plastic cap comprising a cylindrical side wall extending from the peripheral edge of the top plate portion,
The cylindrical side wall of the cap body is composed of a first cylindrical side wall continuous with the top plate portion and a second cylindrical side wall extending downward from the first cylindrical side wall via a horizontal flange wall. ,
A locking projection that engages with the outer surface of the container mouth is formed on the inner side of the lower end of the first cylindrical side wall,
An opening is formed in the horizontal flange wall between the first cylindrical side wall and the second cylindrical side wall, and the tear tab hinged to the horizontal flange wall is swingably connected to the opening. Is provided,
From both ends of the base portion of the tear tab, first and second tear scores extend at a distance from each other,
The tear tab is raised above the upper surface of the horizontal flange wall when the upper lid is opened, but is pushed into the opening by contacting the lower end of the upper lid when the upper lid is closed. Plastic cap with excellent separation function.   Of the two tear scores, the first score is lowered to the lower end of the second cylindrical side wall or the vicinity thereof, but the second score is the second cylindrical side wall or the horizontal flange. The plastic cap according to claim 1, wherein the wall extends in the circumferential direction.   The plastic cap according to claim 1, wherein a locking projection that engages with the outer surface of the container mouth portion is not formed on the inner side of the lower end of the first cylindrical side wall corresponding to the end point of the second score.   2. The plastic cap according to claim 1, wherein both of the first score and the second score descend substantially in parallel and extend to the lower end of the second cylindrical side wall or the vicinity thereof.

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