JP2001146250A - Plug fixing type synthetic resin cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict an unfair activity at a distributing stage of a cap of which main body can be torn out and removed from a bottle port to facilitate recycling of a container, facilitate discovering of the unfair activity when this activity is provided and assure a fixing strength against the bottle port. SOLUTION: A lower end of an outer cylinder 4 at a main body 2 is formed with an outward protrusion 12. In turn, a lid 3 is provided with a skirt segment 3b overlapped from above on the protrusion 12. The outer cylinder 4 of the main body 2 is provided with a notch 13. A location in the notch 13 is formed with a tab 14 of which outer circumferential surface is aligned with the protrusion 12. The outer cylinder 4 is provided with a weakening line 16 with a root of a tab 14 being applied as a starting end. The tab 14 is connected to the outer cylinder 4 through a bridge 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to stoppering (forced fitting).
The present invention relates to a synthetic resin cap adapted to be attached to a bottle mouth (mouth of a container).

[0002]

2. Description of the Related Art A stopper-type cap is forcibly fitted to a bottle mouth and provided with a spout, and a screw-type or hinge-type lid for closing the spout of the main body. Consists of

[0003] The main body has an outer cylindrical portion fitted into the bottle mouth from outside, and is fitted on an inner periphery of the outer cylindrical portion with an annular engaging portion such as an annular projection formed on the outer periphery of the bottle mouth. An annular locking portion is formed, and the annular locking portion is elastically deformed and fitted to the annular engaging portion of the bottle mouth, thereby being attached to the bottle mouth.

[0004] In most cases, the stopper-type cap is made of a material different from that of the container (bottle). In order to facilitate recycling of the container, the cap is removed after the contents are used. Need to be easily removable from the

In this regard, the applicant of the present application has disclosed in
In JP-A-61454, the outer cylinder part of the main body is provided with a tab that can be picked by a finger with a finger and a weakened part that tears the outer cylinder part by pulling the tab, so that it can be easily removed from the container. I suggested a cap like that.

The purpose of the present invention is to further develop this prior invention.

[0007]

According to a first aspect of the present invention, there is provided a cap comprising: a main body having an outer cylindrical portion fitted from the outside into a bottle mouth having an annular engaging portion formed on an outer peripheral surface; A lid which is formed on the inner periphery of the outer cylindrical portion of the main body by an elastic deformation caused by tapping to fit into the annular engagement portion of the bottle mouth. Is formed so as to cover up to or near the lower end of the cylindrical portion of the main body.

The main body is provided with a tab which can be picked up by a finger of a person and a weakened portion for tearing the outer cylinder by pulling the tab so that the tab is located at a lower portion of the outer cylinder. Has formed.

According to the second aspect of the present invention, the tab is formed so as to extend in the circumferential direction while being exposed to the outside from the lower end of the lid, and the outer peripheral surface of the tab and the outer peripheral surface of the lower end of the lid are formed. Are set to form almost the same plane,
The weakening portion is formed so as to extend upward or obliquely upward from the base of the tab so as to extend in the circumferential direction after traversing the annular locking portion.

[0010]

According to the present invention, since the tab is located below the outer cylindrical portion of the main body, the weakened portion can be formed over a wide range of the outer cylindrical portion. For this reason, it is possible to prevent or significantly reduce an accident in which the weakened portion is broken due to elongation deformation at the time of plugging, and it is possible to suppress a decrease in mounting strength to the bottle mouth.

Further, since the entire or most of the outer cylindrical portion of the main body is covered with the lid, when the inner surface of the lid is brought into close or close contact with the outer cylindrical portion of the main body, the lid serves to reinforce the outer cylindrical portion. This also makes it possible to prevent or significantly reduce the possibility that the annular locking portion breaks due to elongation during tapping.

When the container is sealed with this kind of cap, there is a possibility that the outer cylinder of the main body may be illegally torn at the distribution stage such as when the product is displayed in a store. As a countermeasure against this misconduct, the idea of preventing the misconduct by hiding the fact that it is a tearable cap and letting consumers know if there is any misconduct, There is a way to make it possible to visually recognize the fact that fraud has occurred before purchase.

Regarding this point, in the present invention, it is possible to adopt a form in which the entire body including the tab is covered with the lid or a form in which the tab is exposed. When the cover is covered with a lid, the tab is not exposed to the public at the distribution stage, so that it is possible to suppress the occurrence of fraudulent acts. You can easily see the facts of the act.

When tearing the outer cylinder by pulling the tab,
The longer the tab, the more it can be pulled and pulled lightly. And it is also conceivable to provide a tab on the upper part of the outer cylinder part, but if the tab is formed by cutting out the cylinder part, the strength of the outer cylinder part is reduced accordingly, so there is a limit to making the tab larger, It is difficult to take a tab and tearing is troublesome.

On the other hand, in the present invention, since the tab is provided at the lower portion of the outer cylindrical portion, the length of the tab can be increased without lowering the strength of the outer cylindrical portion. Although it is a cap that can be firmly attached to the mouth,
It becomes possible to make it a form which can be easily torn.

According to the second aspect of the present invention, the tab can be formed so as to be located outside the radius of the outer cylindrical portion. There is an advantage that the tab can be formed without impairing the ease of die cutting. Since the outer peripheral surface of the tab and the outer peripheral surface of the lower end of the lid are aligned, the appearance is good.

[0017]

Next, embodiments of the present invention will be described with reference to the drawings.

(1) First Embodiment (FIGS. 1 to 5) FIGS. 1 to 5 show a first embodiment. FIG. 1 shows a state in which a cap 1 is attached to a bottle mouth B. Front view, FIG. 2 is a cross-sectional view in a state where the main body 2 and the lid 3 are separated, FIG. 3 is a front view of only the main body 2, and FIG. 4A is an IVA-IVA of FIG.
FIG. 5B is a sectional view taken along the line IVB-IVB in FIG.
(A) is a sectional view taken along the line VA-VA of FIG. 4 (B), and (B) is a VB-VB of FIG. 4 (A).
FIG.

{Basic Structure of Main Body} The main body 2 is integrally connected to the inner cylindrical portion 5 with the outer cylindrical portion 4 fitted into the bottle mouth B from the outside, the inner cylindrical portion 5 fitted into the bottle mouth B from inside. Outlet 6 is provided. The upper end of the outer cylinder portion 4 that is continuous with the inner cylinder portion 5 is a shoulder 4a with a step difference, and a male screw into which the lid 3 is screwed into a portion of the inner cylinder portion 5 above the shoulder portion 4a. 7 are formed.

The corner between the outer peripheral surface of the outer cylindrical portion 4 and the shoulder portion 4a is cut into a chamfered shape. In addition, a shielding plate 8 is provided in the outlet 6.
Are formed integrally with each other, and a closed loop score 9 for opening and a pull ring 10 are formed on the shielding plate 8. On the outer peripheral surface of the bottle mouth B, a flange B1 that is in close or close contact with the lower end of the outer cylinder portion 4 is formed.

On the inner peripheral surface of the outer cylinder portion 4 of the main body 2, an annular groove fitted to an annular protrusion B2 formed on the outer peripheral surface of the bottle mouth B is provided.
11 are formed. The annular projection B2 is an example of an annular engaging portion described in the claims, and the annular groove 11 is an example of an annular engaging portion. An annular groove is formed in the bottle mouth B, and an annular protrusion B2 is formed in the outer cylindrical portion 4.
May be provided inwardly, and a plurality of annular grooves or annular projections may be provided.

{Structure for Removal} The lower edge of the outer cylindrical portion 4 of the main body 2 is formed to be thick by forming a ridge 12 having a radially outward and rectangular cross section. And
In the outer peripheral surface of the outer cylindrical portion 4, a recess 13 which is recessed inward is formed in a certain range extending in the circumferential direction by thinning the outer cylindrical portion 4, and a lower end of the recess 13 is formed. A strip-shaped tab 14 having one end firmly connected to the ridge 12 is disposed at the position. Needless to say, the ridges 12 are separated by recesses 13.

The tab 14 has the same vertical dimension as the ridge 12 of the outer cylindrical portion 4, and a slight gap is formed between the tab 14 and the recess 13. The tab 14 is set to a length that can be easily picked by a finger with a finger, and one end (base end) thereof is firmly connected to one end of the ridge 12. Also tab 14
Is connected to the ridge 12 via a bridge 15 which can be shredded.

The outer cylinder 4 has a thin weakened line (score) as an example of a weakened portion for tearing the outer cylinder 4.
16 are formed. The weakening line 16 extends obliquely upward from the base of the tab 14 while moving away from the tab 14 and then extends in the circumferential direction to the shoulder 4a. As a whole, the weakening line 16 has a length of about half the circumference of the outer cylinder 4. Is set to The starting end of the weakening line 16 is located at the end of the recess 13 and reaches the lower end of the outer cylinder 4.

For example, as shown by a dashed-dotted line 17 in FIG. 3, the weakened line 16 only needs to be located above the annular projection B2 of the outer cylindrical portion 4, and necessarily extends to the shoulder portion 4a. Although it is not necessary, the weakening line 16 is connected to the shoulder 4a as in the present embodiment.
Extending this length has the advantage of reducing the die-cutting resistance when manufacturing with a mold.

On the inner surface of the tip of the tab 14, an inward projection 14a for improving the catch of a finger when a person picks it with a finger is provided.
Is provided. Note that a large number of inward projections 14a may be provided at intervals in the longitudinal direction, or an appropriate number of projections may be provided on the outer surface of the tab in addition to or instead of the inward projections 14a. Further, the position and the number of the bridges 15 can be appropriately changed as needed.

For example, as can be easily understood from FIG. 5A, the recess 13 is formed to be open vertically. Therefore, in molding the main body 2 with a pair of molds,
The tab 14 can be formed in a state where it can be easily die-cut.

{Structure of Lid} The lid 3 is a shoulder 4a of the main body 2.
An upper portion 3a having a cylindrical shape with an inverted bottom and a large-diameter skirt portion 3b connected to the lower end of the upper portion 3a. The inner surface of the upper portion 3a is provided with a middle foot that fits into the spout 6 from inside.

The corner between the outer peripheral surface of the skirt 3b and the step is also
The shape is cut obliquely in a chamfered shape according to the main body 2. Also, as can be understood from FIG.
The skirt portion 3b and the outer cylindrical portion 4 of the main body 2 are set to be in close contact or close contact.

The skirt portion 3b is connected to the outer cylindrical portion 4 of the main body 2.
The projections 12 and the tabs 14 are formed so as to overlap with the upper surfaces thereof. The outer peripheral surface of the skirt portion 3b is
And are arranged so as to be flush with the outer peripheral surface of the tab 14. Therefore, when the cover 3 is screwed, the recess 13
Cannot be seen. In addition to this, the bridge 15 is small and inconspicuous, so that it is difficult to visually recognize that the tearing tab 14 is exposed.

{Operation} The cap 1 is plugged from above into the bottle mouth B in the packaging step with the lid 3 attached to the main body 2, and the annular groove 11 is formed by utilizing the elastic deformation of the outer cylinder. By tightly fitting the annular projection B2 of the bottle mouth B, the container is sealed. When the consumer recycles the container after using up the contents of the container, the user pulls the tab 14 with the lid 3 removed, tears the outer cylinder 4 along the line of weakness 16 and then removes the body 2 by hand. It's better if you grab it and pull it out of bottle B.

Since the weakening line 16 is formed over the entire outer cylinder portion 4, it is possible to prevent or remarkably suppress an accident that the weakening line 16 is broken in the plugging step.
A decrease in the strength of attachment to the bottle mouth B can be suppressed. When the skirt portion 3b of the lid 3 is brought into close contact with the outer cylinder portion 4 of the main body 2 as in the embodiment, the outer cylinder portion 4 is reinforced by the skirt portion 3b. it can.

The weakening line 16 can be formed so as to extend in the axial direction of the cap 1. However, if the weakening line 16 is formed to extend obliquely as in this embodiment, the length of the weakening line 16 becomes longer. There is an advantage that the strength can be improved accordingly.

In the packaged state, the presence of the tab 14 is hardly visually recognized as described above.
It is possible to prevent or reduce wrongdoing at the distribution stage. As in the embodiment, if the bridge 15 is exposed, even if the lid 3 is removed at the distribution stage, the tab 14 is pulled and the outer cylinder portion 4 is torn, and then the lid 3 is attached again, the bridge 15 is torn. The fraudulent activity can be visually recognized.

When the tabs 14 are pulled, the tabs 14 tend to bend and stick out of the outer peripheral surface of the main body 2 in most cases. Therefore, even if the bridges 15 are not exposed, You can easily confirm the fact of wrongdoing.

(2) Second Embodiment (FIG. 6) In the second embodiment shown in FIG. 6, the outer surface of the tab 14 is knurled. Other structures are the same as those of the first embodiment. Knurling may also be applied to the inner peripheral surface of the tab 14.

(3) Third Embodiment (FIG. 7) In the third embodiment shown in FIG. 7, the lid 3 is connected to the outer cylinder 3c and the inner cylinder 3d.
And the outer surface is formed in a straight shape as a whole. A plurality of plate-shaped ribs connecting the outer cylinder 3c and the inner cylinder 3d may be provided at appropriate intervals along the circumferential direction. In FIG. 7, the cylindrical portion of the lid 3 is composed of the outer tube 3c and the inner tube 3d. This is because the amount of resin used in forming the cover 3 is reduced and the thickness of each portion is made as uniform as possible. This is to prevent sink marks.

(4) Fourth Embodiment (FIG. 8) In the fourth embodiment shown in FIG. 8, when the lid 3 is formed in a two-stage system including an upper part 3a and a skirt part 3b, the upper part of the skirt part 3b is formed. Are formed in an arc-shaped cross section. In this case, only the upper part 3a is knurled, but the skirt part
Knurling may be performed up to 3b, or conversely, knurling may not be performed at all (this point is the same in other embodiments).

(5) Fifth Embodiment (FIG. 9) FIG. 9 shows a fifth embodiment, wherein (A) is a front view of a main part, and (B) is a cross-sectional view taken along line BB of (A). It is. In this example,
The recess 13 is formed only at the lower edge of the outer cylinder portion 4,
The bridge 15 is provided at a position hidden by the skirt 3b of the lid 3. Even in the structure of this example, the die can be easily cut out during manufacturing.

(6) Sixth Embodiment (FIGS. 10 to 12) FIGS. 10 to 12 show a sixth embodiment. FIG. 10 (A) is a partially cutaway front view, and FIG. 10 (B). 10 is a cross-sectional view taken along the line BB of FIG. 10 (A), FIG. 11 is a side view of the main body 2 viewed from the direction of the line XI-XI of FIG. 10 (A), and FIG. It is.

In this example, the tab 14 is formed in a ring shape, and a part of the tab 14 is connected to the lower end of the outer cylindrical portion 4 via a continuous portion 18 that cannot be cut. The outer cylinder 4 of the main body 2 has two weakening lines starting from both sides of the continuous portion 18.
16 are formed.

The weakening line 16 extends upward once as shown in FIG. 11 and then changes its direction diagonally upward to reach the shoulder 4a, and then, as shown in FIG. Extends to. 2 Just the weakening line 16 is the shoulder as a whole
It extends to about half the circumference of 4a. The tabs 14 are connected to the outer tube 4 at a plurality of positions via bridges 15.

In this example, as shown by a dashed line in FIG. 10, the tab 14 is raised upward, and then the outer cylinder portion 4 is torn along the line of weakness 16 when the user pulls the tab 14 upward with his / her finger. . In this case, since the tab 14 can be strongly pulled by applying a force, there is an advantage that the tear can be extremely easily performed. The lid 3 may be formed in the same form as in the first embodiment.

(7) Seventh Embodiment (FIG. 13) FIG. 13 shows a seventh embodiment, in which (A) is a partially cutaway front view, and (B) is a plan view of FIG. is there. In this embodiment, the recess 13 is formed in a vertically open state as in the first embodiment, and a tab 14 is arranged in the recess 13.

The tab 14 is provided continuously at the lower end of the outer cylinder 4 (this form is also included in the claims), and the entire tab 14 is set to have a width larger than the vertical width of the connection 18. ing. Further, the tab 14 is formed so as to be entirely covered with the lid 3. In this example, the lid 3 is formed as thin as possible in order to secure the strength by forming the tab 14 as thick as possible.

In this embodiment, the tab 14 has a wide width in the vertical direction, so that it is easy to take a picture, and therefore, there is an advantage that the tab 14 can be easily torn. Also, since the entire tab 14 is hidden by the lid 3,
In the distribution stage, the tear-type cap can be completely hidden. Knurling may be applied to the inner surface, outer surface, or both surfaces of the tab 14.

(8) Eighth Embodiment (FIG. 14) In each of the above embodiments, the lid 3 is configured as a screw lid separate from the main body 2, but the eighth embodiment of FIG. As shown in FIG. 7, the hinge 3 can be applied to a type in which the lid 3 is integrally connected to the main body 2.

In this case, the lid 3 is formed in a double cylindrical shape composed of an outer cylinder 3c and an inner cylinder 3d, and a finger is hooked on a portion opposite to the hinge portion 19 across the axis. The recess 20 is formed. In order to allow the lid 3 to open, a portion of the outer cylinder 3c below the hinge portion 19 is cut open so as to open downward.

(9). Others This embodiment can be embodied in various ways other than the above embodiment. For example, the weakened portion is not limited to being formed in a thin shape, but may be perforated. Also, the tabs can be embodied in various shapes. Furthermore, the annular engaging portion and the annular locking portion need only extend in an annular shape, and need not necessarily be continuous over the entire circumference.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a cap according to a first embodiment is attached to a bottle mouth.

FIG. 2 is a cross-sectional view in a state where a main body and a lid are separated.

FIG. 3 is a front view of only a main body.

FIG. 4 (A) is a plan view as viewed from IVA-IVA of FIG. 3, and FIG.
It is IVB-IVB sectional drawing.

5A is a sectional view taken along the line VA-VA of FIG. 4B, and FIG. 5B is a sectional view of FIG.
FIG. 5 is a sectional view taken along line VB-VB of FIG.

FIG. 6 is a front view of a main part of the second embodiment.

FIG. 7 is a partially cutaway front view of the third embodiment.

FIG. 8 is a partially cutaway front view of the fourth embodiment.

FIG. 9 is a view showing a fifth embodiment, (A) is a partial front view,
(B) is a sectional view.

FIG. 10 is a diagram showing a sixth embodiment.

11 is a side view of the main body as viewed from XI-XI in FIG.

FIG. 12 is a sectional view taken along the line XII-XII of FIG. 11;

FIG. 13 is a diagram illustrating a seventh embodiment;

FIG. 14 is a diagram illustrating an eighth embodiment.

[Brief description of reference numerals]

 B Bottle mouth (mouth of container) B2 Annular projection as an example of an annular engagement portion 1 Cap 2 Main body 3 Lid 4 Outer cylinder portion 5 Inner cylinder portion 6 Spout 11 Annular groove 12 as an example of annular locking portion 12 Projection Article 13 Recess 14 Tab 15 Bridge 16 Weak line as an example of weakened part

Claims (2)

[Claims] 1. A main body having an outer cylinder portion fitted from the outside into a bottle mouth having an annular engagement portion formed on an outer peripheral surface, and a lid for closing the main body, wherein the outer cylinder in the main body is provided. On the inner periphery of the portion, an annular locking portion that fits into the annular engaging portion of the bottle mouth is formed by elastic deformation by tapping, and further covers the lid to the lower end of the cylindrical portion of the main body or to the vicinity of the lower end. A synthetic resin cap formed in a state, wherein the main body includes a tab that can be taken by a finger of a person and a weakening portion for tearing the outer cylinder portion by pulling the tab, wherein the tab has an outer cylinder. A stopper-attachable synthetic resin cap formed so as to be located at the lower part of the part. The tab is formed so as to extend in a circumferential direction in a state of being exposed to the outside from a lower end of the lid, and
The outer peripheral surface of the tab and the outer peripheral surface of the lower end portion of the lid are set to be substantially the same surface, and the weakened portion extends upward or obliquely upward from the base of the tab to thereby form the annular locking portion. 2. The stopper-attachable synthetic resin cap according to claim 1, wherein the cap is formed so as to extend in the circumferential direction after crossing the cap.