JPH09132255A - Pilferproof type screw lid made of metal plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a sharp burr-form part remaining on the lower end edge of the cylindrical main body from becoming a cause of an injury after a screw lid is removed from a bottle mouth, and a ring-form cutting off part is torn off from the cylindrical main body at a bridge part. SOLUTION: Among bridge parts 9 which connect a cylindrical main body 3a and a ring-form cutting off part 3b, on a wider bridge part 9 which is adjacent to a main score 12 to break the ring-form cutting part 3b, an extremely thin auxiliary incision 11 is formed. Since the wider bridge part 9 is broken in the circumferential direction, by simply pulling the ring-form cutting off part 3b, the wider bridge 9 is torn under a smooth state wherein almost no trace remains.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pill fur proof type screw cap which allows an unopened state to be visually recognized.

[0002]

2. Description of the Related Art As shown in FIG. 8A, a pill fur proof type screw lid 21 made of an attribute plate has a top plate portion 21 and a tubular portion 2.
2 in the lower portion of the cylindrical portion 22,
Multiple notches (slits) extending along the circumferential direction
24 and the separable bridge portions 25 and 26 are formed so as to extend alternately, so that a portion above the cut 25 is formed as the cylindrical portion main body 23a, and a portion below the cut 24 is formed as the tubular portion main body 23a. It is a ring-shaped cutout 23b that can be separated.

[0003] Generally, a packing (not shown) is attached to the inside of the screw lid 21, and the screw lid 21 is pressed against the bottle opening D 1 against the elasticity of the packing. And the ring-shaped cutout 2
3b is fitted to the bottle by bending the lower end edge toward the lower surface of the annular projection D3 formed on the outer peripheral surface of the bottle mouth D1.
Is broken and the fact that it has been opened can be seen.

In this case, the ring-shaped cut portion 2 is opened after opening.
There is a type in which the ring 3b remains in a state in which it is fitted in the bottle mouth D1, and a type in which the ring-shaped cut portion 23b can be removed from the bottle mouth D1 after opening. In the case of the latter type in which the ring-shaped cutout 23b can be removed from the bottle opening D1 after opening, one of the plurality of bridges 25, 26 is replaced with one bridge 26.
A wide bridge portion having a larger lateral width than the other bridge portions 25 is formed, and a thin score 27 extending in the axial direction is formed at a portion of the ring-shaped cut portion 23b close to the wide bridge portion 26. ing.

[0005] That is, by setting one bridge portion 26 to be wide and leaving the portion of the wide bridge portion 26 at the time of opening, the shear stress in the axial direction is concentrated at the location of the score 27 and the score 27 is broken. And thus
The ring-shaped cutout 23b is cut off, the screw lid 21 is removed from the bottle opening D1, and then the ring-shaped cutout 23b is cut by hand.

[0006]

When the ring-shaped cutout 23b is to be removed after opening, as shown by the arrow A in FIG. Can be cut into a beautiful state with almost no traces left, but consumers do not always cut in such a form, but rather, as shown by arrows B in FIGS. 8B and 8C. In many cases, the wide bridge portion 26 is torn apart simply by simply pulling the ring-shaped cut portion 23b from the tubular portion main body 23a.

However, when the ring-shaped cut portion 23b is simply pulled as shown by the arrow B, FIG.
As shown in (C), the portion of the wide bridge portion 26 is torn, and after the ring-shaped cutting portion 23b is torn off, the portion of the wide bridge portion 26 of the lower end edge of the tubular portion main body 23a. In some cases, sharply pointed burr-like portions 28 are formed, which causes a problem that the fingers may be injured. There is also a problem that the finger picking up the ring-shaped resection portion 23b may slip and injure the finger.

In this respect, Japanese Utility Model Publication No. 58-43568 discloses a wide bridge portion 2 as shown in FIG.
Two auxiliary slits 29 on the left and right sides and a thin auxiliary score 30 located between the auxiliary slits 29 are formed at six positions, and a main score 27 for dividing the ring-shaped cutout portion 23b is provided on one side. It is described that it is formed so as to be connected to the auxiliary slit 29. FIG. 8 (E)
FIG. 7D is a sectional view taken along line EE in FIG.

When an auxiliary score 30 is provided in the wide bridge portion 26 as disclosed in Japanese Utility Model Publication No. 58-43568,
When the ring-shaped cutout portion 23b is cut in a direction as indicated by an arrow A in FIG. 8B, a fold is formed along the auxiliary score 30, so that the wide bridge portion 26 is cleaned in a clean state. It can be easily shredded. However, the auxiliary score 30 is merely thin and, moreover,
Since the thickness of the auxiliary score 30 varies in processing, the wide bridge portion 2 is simply pulled by the ring-shaped cut portion 23b as indicated by an arrow B in FIG.
In the case where the number of pieces is smaller than 6, the tearing does not always occur along the auxiliary score 30, but rather the auxiliary slit 29.
Is often torn diagonally starting from one of the auxiliary slits 29 as shown by the dashed line 31 in FIG.
It was difficult to say that it was possible to reliably prevent the formation of the sharp pointed burr-like portion 28 at the lower end edge of the cylindrical portion main body 23a after the b was cut.

In other words, even if the auxiliary score 30 is formed in the wide bridge portion 26, the auxiliary score 30 hardly plays a role of a guide for tearing when the ring-shaped cut portion 23b is pulled. . In addition, without providing the wide bridge part 26, all the bridge parts 25,
When 26 is set to the same width dimension, since the stress in the axial direction cannot be concentrated at the location of the dividing score 27, the ring-shaped cut portion 23b cannot be divided at the location of the score 27. , Ring-shaped cutout 23b
Frequently cannot be removed from the bottle mouth D1. Therefore, the wide bridge portion 26 is formed close to the score 27.

A first object of the present invention is to reliably prevent a sharp-pointed burr-like portion from remaining on a cylindrical body after opening and tearing a ring-shaped cutout, thereby improving safety. It is in. By the way, bottles that have been opened and used are often collected and reused after a process such as washing. In particular, today, when resource saving is strongly demanded, this recycling tendency has become remarkable.

However, when the consumer removes the ring-shaped cutout 23b after opening the bottle, as shown in FIG. 8F, the ring-shaped cutout 23b is pinched and bent with a finger and used. May be pushed into the used bottle D. In this case, the ring-shaped cutout 23b of the conventional screw cap 21 merely forms the score 27 for division in the vicinity of the wide bridge 26, so that the ring-shaped cutout 2 which has been shredded is cut.
3b is hardly formed into a thin folded shape even when the consumer picks and presses and bends 3b, and often remains in a considerably widened state. Often, it is caught on the bottle mouth D1 and cannot be removed.

Therefore, in the process of reusing the bottle D, the ring-shaped cutout 23b pushed into the bottle D is manually pulled out with a hook-shaped member, and this operation requires a great deal of labor and cost. There was a problem that it was hanging. A second object of the present invention is to improve this problem.

[0014]

In order to achieve the first object, according to the present invention, as described in claim 1, "a top plate portion located at the top surface of a bottle mouth, A plurality of main cuts extending in the circumferential direction while penetrating the inner and outer sides of the cylindrical portion at a portion near the lower end of the cylindrical portion, and a plurality of cutable portions that can be shredded. By forming the bridge portion so as to intermittently and extend alternately, a portion of the tubular portion above the main cut is formed as a tubular portion main body, and a portion below the main cut is formed from the tubular portion main body. Form a detachable ring-shaped cutout, and any one of the plurality of bridges,
It is set to a wide bridge portion having a lateral width larger than that of the other bridge portions, and further, a thin-walled score extending in the axial direction is formed in a portion of the ring-shaped cutout portion of the tubular portion near the wide bridge portion. In addition, a threaded portion is formed on the tubular body, and the lower end edge of the ring-shaped cutout portion is attached to the lower surface of the annular projection formed on the outer peripheral surface of the bottle mouth in a state where the threaded portion is screwed into the bottle mouth. By folding and locking, in the screw lid made of a metal plate configured to be fitted into the bottle mouth, in the wide bridge portion of each bridge portion in the tubular portion,
The auxiliary notch that divides the wide bridge along the circumferential direction is formed so as to penetrate inside and outside the wide bridge portion. "

[0015] In order to achieve the second object, as described in claim 2, according to claim 1, "the wide-width bridge having at least the axial center of the ring-shaped cutout portion in the cylindrical portion interposed therebetween. An auxiliary score extending in the axial direction is formed at a portion located on the opposite side of the portion. "

[0016]

According to the present invention, even if the wide bridge portion is divided in the circumferential direction by the auxiliary notch, the lateral width of the auxiliary notch is only small, so that the tensile strength of the wide bridge portion is small. Since it can be made larger than the other bridge parts, when unscrewing the screw lid and opening it, the axial shearing force is concentrated on the score for dividing the ring-shaped cut part, and the score is securely broken. Therefore, the removal of the ring-shaped cut portion is not uncertain due to the division of the wide bridge portion by the auxiliary cut.

Further, since the auxiliary notch penetrates the inside and outside of the wide bridge, it is not necessary to strictly control the processing accuracy in processing the auxiliary notch, and the auxiliary notch can be easily processed without requiring technical difficulties. it can. Then, when opened, the screw lid is removed from the bottle mouth, and when the ring-shaped cutout portion is pulled from the tubular body, the wide bridge portion is divided by the auxiliary cut, in other words,
The wide bridge portion is only connected to the main body of the tubular portion in multiple points, so that the wide bridge portion can be shredded with a light force, and the traces of the wide bridge portion can be removed. It can be prevented from remaining largely on the lower edge of the main body. That is, it is possible to prevent the sharply pointed burr-like portion from being formed on the lower end edge of the tubular body.

Therefore, according to the present invention, there is an effect that the safety after opening can be remarkably improved without slightly impairing the reliability and ease of opening. Further, by providing an auxiliary cut in the wide bridge portion, the wide bridge portion is much easier to break, so that when the ring-shaped resection portion is pulled and removed, the fingers may slip and be injured.
It can be significantly reduced as compared with the conventional case.

On the other hand, according to the constitution of claim 2, when the consumer tries to push and bend the torn ring-shaped cut portion with a finger after opening, each auxiliary score becomes a fold,
The ring-shaped excision part is pushed and bent into a thinly extended state,
In many cases, breakage occurs at folds, so even if this bent or broken ring-shaped cutout is put into a used bottle, the ring-shaped cutout can be taken out just by turning the bottle upside down. Is dramatically improved.

Therefore, according to the structure of claim 2, claim 1
In addition to the above-mentioned effects, there is an effect that the labor and cost required for the bottle reuse process can be reduced.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;
A description will be given based on ７7). 1 is a front view of the screw lid 1 before use, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG.
IIIA-IIIA plan sectional view, FIG. 3B is IIIB-IIIB of FIG.
FIG. 4 is a partially cutaway front view in a state in which the bottle mouth D1 is fitted.

The screw lid 1 is manufactured by sheet metal working of a thin metal plate such as a tin plate, and includes a top plate portion 2 located at the top surface of the bottle mouth D1, and a cylindrical portion fitted to the bottle mouth D1. 3 and 3 form a bottomed cylindrical shape with a downward opening. At a position near the upper end of the cylindrical portion 3, a contraction portion 5 for holding the packing 4 so as not to be detached is formed. In addition, a knurled portion 6 is formed above the constricted portion 3a mainly for the purpose of improving the catching of fingers when the lid is opened or flat.

A portion of the cylindrical portion 3 near the lower end is bulged radially outward, and the bulged portion 7 has a plurality of main cuts 8 and a plurality of bridge portions 9 and 10 extending in the circumferential direction. Are formed so as to extend alternately, so that a portion of the cylindrical portion 3 above the main cut 8 is formed as the cylindrical portion main body 3a, and a portion below the main cut 8 is defined as the cylindrical portion main body 3a. And a ring-shaped cut-off portion 3b that can be separated therefrom.

Each main cut 8 penetrates the inside and outside of the cylindrical portion 3. The “cut” in the present invention is a concept including both a state in which both sides sandwiching the main cut are in close contact and a “slit” with a gap. Each of the bridge portions 9 and 10 has a width dimension that can be shredded. One of the bridge portions 9 and 10 is formed as a wide bridge portion 9 having a large lateral width, and the wide bridge portion 9 is divided into two in the circumferential direction. The auxiliary notch 11 is formed. On the other hand, the remaining bridge portions are set to narrow bridge portions 10 having a small width.

Further, in the ring-shaped cutout portion 3b, a thin main score 12 extending over the entire vertical length in a state of being connected to the main cut 8 is formed near either the left or right side of the wide bridge portion 9. Further, in the ring-shaped cutout 3b, an auxiliary score 13 extending over the entire length in the vertical direction is formed at a position corresponding to each narrow bridge portion 10.

The screw lid 1 having such a structure is fitted into the bottle mouth D1 as shown in FIG. That is, in a state in which the screw lid 1 is pressed against the bottle mouth D1 from above so as to compress the packing 4, the cylindrical body 3 is rotated by a roller (not shown).
By pressing and deforming a along the screw groove D2 of the bottle mouth D1, the threaded portion 3c is rolled on the tube body 3a, and the lower end edge of the ring-shaped cutout portion 3b is moved to the bottle mouth D.
The annular protrusion D3 in FIG.

When the screw lid 1 is unscrewed, as shown in FIG. 5, the narrow bridge portion 10 is cut and the main score 12 is broken, and the screw lid 1 can be removed from the bottle mouth D1. In this case, even if the wide bridge portion 9 is divided by the auxiliary cut 11, the wide bridge portion 9 is connected to the tubular portion main body 3a by the two portions 9a. The tensile strength has a value larger than that of the other narrow bridge portions 10, and therefore, a large axial shearing force acts on both sides of the ring-shaped cut portion 3b with the main score 12 interposed therebetween. Therefore, the main score 12 of the ring-shaped cutout portion 3b can be reliably broken.

Therefore, the ring-shaped removal portion 3b cannot be removed because the wide bridge portion 9 is divided into two by the auxiliary cut 11. And the wide bridge portion 9 is bisected by the auxiliary notch 11,
In other words, the wide bridge portion 9 has two extremely thin portions 9.
a, the screw lid 1 is removed from the bottle opening D1, and the ring-shaped cutout 3b is replaced with the cylindrical body 3a as shown by the arrow B in FIGS. 5 and 6 (A). 3a
In the same manner as when the pulling member is simply pulled, no trace of the wide bridge portion 9 remains on the lower end edge of the tubular portion main body 3a, just as sharp burrs do not occur at the broken portions of the narrow bridge portion 10. It is cut off in a state (FIG. 6 (B)
reference).

Therefore, it is possible to prevent a sharp burr-like portion from being formed at the lower end edge of the cylindrical portion main body 3a, and to remarkably improve safety. Further, when the ring-shaped cut portion 3b is cut apart, the thin two portions 9a of the wide bridge portion 9 are cut in order, so that it can be cut with a light force to reduce the risk of injury to fingers. You can.
As shown in FIG. 7 (A), as described above, the tubular portion main body 3
When the ring-shaped cut portion 3b that has been cut into pieces from a is pressed with a finger F and then inserted into a used bottle D, the ring-shaped cut portion 3b is bent into a thinly extended state with the auxiliary score 13 as a fold, Alternatively, since it often breaks at the position of the auxiliary score 13, as shown in FIG. 7B, it is possible to dramatically increase the rate at which the ring-shaped cutout portion 3b can be removed simply by turning the bottle D upside down. it can. Therefore,
The labor and cost in the process of recycling and reusing the bottle D can be reduced.

In the above embodiment, only one auxiliary cut 11 is formed in the wide bridge portion 9, but a plurality of auxiliary cuts 11 may be formed so as to be arranged intermittently. Further, the lateral width dimension and shape of the auxiliary cut 11 can be set arbitrarily, and for example, the auxiliary cut 11 may be formed in a hole shape.

[Brief description of the drawings]

FIG. 1 is a front view of a screw cap according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

3A is a plan sectional view taken along the line IIIA-IIIA in FIG. 2, and FIG.
FIG. 3 is a sectional view taken along line IIIB-IIIB of FIG.

FIG. 4 is a partially cutaway front view in a state fitted to the bottle mouth.

FIG. 5 is a view showing a state in which the screw cap is opened and the screw cap is removed from the bottle mouth;

6 (A) and 6 (B) are diagrams showing actions.

FIGS. 7A and 7B are diagrams showing the operation after opening.

FIG. 8 is a diagram showing a conventional example.

[Explanation of symbols]

 D bottle D1 Bottle mouth 1 Screw lid 2 Top bridge 3 Tube 3a Tube 3b Ring cut 8 Main cut 9 Wide bridge 10 Narrow bridge 11 Auxiliary cut 12 Main score 13 Auxiliary score

Claims (2)

[Claims] 1. A top plate portion located at the top surface of a bottle mouth, and a tube portion extending downward from the top plate portion. A plurality of main cuts extending in the circumferential direction while penetrating both sides are formed so as to extend alternately and intermittently with a plurality of bridge portions that can be shredded, so that the cylindrical portion is larger than the main cut. The upper portion is formed as a cylinder main body, and the portion below the main cut is formed as a ring-shaped cutout that can be separated from the cylinder main body, and any one of the plurality of bridge portions is a bridge portion. A wide bridge portion having a larger lateral width than the other bridge portions is set, and further, a thin-walled score extending in the axial direction is formed at a portion of the ring-shaped cut portion of the cylindrical portion close to the wide bridge portion. Further, the cylinder body In the state where the screw portion is screwed into the bottle mouth, the lower edge of the ring-shaped cut portion is
In a screw lid made of a metal plate configured to be fitted into the bottle mouth by bending and locking the lower surface of the annular projection formed on the outer peripheral surface of the bottle mouth, a wide bridge portion among the bridge portions in the tubular portion A pilfer proof type screw lid made of a metal plate, characterized in that an auxiliary notch that divides the wide bridge along the circumferential direction is formed so as to penetrate inside and outside the wide bridge portion. 2. An auxiliary score extending in the axial direction is formed at a portion of the ring-shaped cut portion of the cylindrical portion corresponding to another bridge portion except for a wide bridge portion. Pill fur proof screw cap made of metal plate.