JP3352243B2 - Seal cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal cap for a container such as a drum.

[0002]

BACKGROUND OF THE INVENTION The seal cap of a container is easy to seal (easy sealability), does not come off during transportation (seal stability), is easy to open (easy openness), and is intentionally third party. When the box is opened, it is required that the seal cap is broken or deformed so that the contents can be clearly confirmed so that the contents can be guaranteed (pyrifa-proof property [virgin guarantee property]). In order to satisfy this requirement, a security band is connected to the lower edge of the plastic screw cap via a plurality of bridges, and if the cap itself is turned, the bridge is clearly torn and the bridge is opened. There is a seal cap of
242555). However, since the seal cap of this soft drink container is a type in which the cap itself is screwed into the bottle, a plug is detachably provided at the mouth of the container body, and the outer periphery of the mouth is covered so as to cover the plug. Not applicable to drums with a seal cap attached to the part.

Conventionally, as a seal cap applied to a drum can, a metal seal cap fitted to a mouth portion of a container body by using a special tool or a lid body from both sides of a tab formed on the lid body has been conventionally used. There is a plastic seal cap in which a cut is formed at the center of the plastic seal cap.

[0004]

The conventional metal seal cap has a problem in that the seal itself cannot be reused as a temporary lid once the seal is opened because the lid itself is broken by breaking the lid itself. If the drum can is stored outdoors, rainwater will enter between the plug and the mouth from the damaged part even if the seal cap once opened is attached to the mouth. If it is not good, there is a possibility that rainwater or dust may enter the container body. In order to seal the metal seal cap, the cap must be fitted to the mouth of the container body using a special tool, but if this operation is performed by an unskilled worker, the cap must be attached. Is insufficient, and as described above, there is a problem that rainwater and dust are mixed into the container body.

[0005] Conventional plastic seal caps are:
Since the tab is pulled to break the upper surface of the lid body and opened, there is a problem that once opened, the seal cap cannot be reused as a temporary lid. In addition, if the seal cap is pryed open from a place other than the tab by a driver or the like, the seal cap is opened without being damaged, so that there is a problem that the pyrifaproof property cannot be satisfied.

SUMMARY OF THE INVENTION An object of the present invention is to provide a seal cap which can be easily sealed and opened, can easily recognize that a third party has intentionally opened the seal, and can be reused as a temporary lid.

[0007]

SUMMARY OF THE INVENTION Therefore, the present invention aims at achieving the above object by providing a tear line portion between the lid main body portion and the belt portion along the circumferential direction. Specifically, the seal cap of the present invention is used for a container body in which a plug is detachably provided at a mouth, and is a seal cap attached to an outer peripheral portion of the mouth so as to cover the plug, A substantially bottomed cylindrical lid body, a belt provided on an opening end side of the lid body, an opening tab provided on the belt, and the lid body and the belt. The belt having a tear line portion provided along the circumferential direction between the belts , and formed of plastic;
A thin portion and a plurality of notched concave portions are formed at an edge of the portion .

[0008] Here, the thickness of the pull-out tear line portion is the cover main body and 2 as compared to the thickness of the third belt parts or less, preferably, even more than 2 and 5 min 3 min Good. If the thickness of the tear line exceeds two-thirds of the thickness of the lid body and the belt, the tear line is too thick to be easily cut. If it is less than two-fifths, the tear line portion may be cut by mistake due to an impact applied to the seal cap during transportation or the like, or may be cut by creep during long-term storage. The plastic forming the seal cap is a plastic such as linear low-density polyethylene (L-LDPE) and other polyethylene, polypropylene, ethylene-propylene copolymer, EVA resin, and polyurethane (PUR). Linear low-density polyethylene is preferred because of its flexibility and excellent chemical resistance, oil resistance and corrosion resistance.

[0009]

A seal cap comprising a lid body, a belt, an opening tab and a tear line is integrally formed by injection molding or the like, and the seal cap is inserted into a mouth of a container body provided with a detachable plug. Attach it by an appropriate method such as work or factory line work. With this seal cap, when the tab for opening is pulled using a tool such as pliers or a screwdriver, the tear line portion provided between the lid body and the belt is torn, and the belt is removed from the lid body. Separated. The lid body from which the belt has been separated is easily removed from the mouth and the cap is opened. Even when the cap is opened, the lid body itself is not damaged, and can be reused as a temporary lid. Here, even if a third party intentionally attempts to remove the entire seal cap from the mouth of the container main body, the tear line portion between the lid main body and the belt portion is torn, so that the pyrifaproof property (virgin assurance) Is secured.

In the seal cap, if a thin portion is formed at the edge of the belt portion, the thin portion is cut even if a third party tries to pry the seal cap from a place other than the opening tab with a screwdriver or the like. Therefore, the pilaf proof property is secured. In addition, if a plurality of notched recesses are formed at the edge of the belt portion, even if a third party tries to pry the seal cap from a place other than the opening tab, the belt portion is cut from the notched recess. As a result, the belt portion is easily deformed outwardly when the seal cap is attached to the mouth of the container body, so that the easy sealing property is further improved.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, in each embodiment, the same components are denoted by the same reference numerals, and the description is omitted or simplified. 1 to 4 show a seal cap according to a first embodiment of the present invention. 1 to 3 showing the appearance of the seal cap, the seal cap 11 is a substantially bottomed cylindrical lid body 2.
And a belt portion 3 provided on the opening end side of the lid body portion 2 and having a constricted portion 3A formed in the center portion along the circumferential direction.
And a tearing tab 4 provided between the lid body 2 and the belt 3, and an opening tab 4 provided at an edge of the belt 3. From one piece. This plastic is made of linear low density polyethylene (L-LDPE) and other polyethylene,
Polypropylene, ethylene-propylene copolymer, EV
A resin and plastic such as polyurethane (PUR) are preferable, but linear low-density polyethylene is preferable in that it has appropriate flexibility and is excellent in chemical resistance, oil resistance and corrosion resistance. The tab 4 for opening is formed in a plate shape having an engagement hole 4A inside. The tear line part 5 is a tab 4 for opening.
, A rising portion 5A formed in parallel with the axial direction from the edge of the belt portion 3 and the rising portion 5A.
And a circumferential portion 5B formed along the circumferential direction and having one end connected to the other end. The other end of the circumferential portion 5B is formed near the one end.

FIG. 4 shows a state in which the seal cap 11 is mounted on the container body. In FIG. 4, a drum 6 as a container main body is provided with a short cylindrical mouth 7 standing upright on a main body 6A, and a plug 8 is detachably provided on the mouth 7. The plug 8 has concave portions on the upper and lower portions, respectively, and its peripheral surface is screwed to the outer peripheral portion of the mouth portion 7. The seal cap 11 of the first embodiment is attached to the outer periphery of the mouth 7 so as to cover the upper part of the plug 8. Reference numeral 9 denotes a seal member interposed between the plug 8 and the mouth 7. The mouth 7 of the drum 6 has a neck 7A at the base, and the neck 3A of the belt 3 is fitted into the neck 7A. A circumferential portion 5B of the tear line portion 5 is located at an upper end edge of the constricted portion 7A. The thickness T ₁ of the tear line portion 5 is the thickness of the lid body portion 2 and the belt portion 3
Compared to T ₂ 3 min of 2 or less, preferably, 2 or less and 5 minutes 2 or more of 3 minutes. If the thickness T ₁ of the tear line portion 5 exceeds two-thirds compared to the thickness T ₂ of the lid main body portion 2 and the belt 3, tear line portions 5 are not cut too thick. If it is less than two-fifths, the tear line portion 5 may be cut by mistake due to an impact applied to the seal cap 11 during transportation or the like,
May be cut by creep during long-term storage.

In the first embodiment of this configuration, the lid main body 2,
The seal cap 11 including the belt portion 3, the opening tab 4 and the tear line portion 5 is integrally formed by injection molding.
The seal cap 11 is attached to the mouth 7 of the drum 6 in which the plug 8 is detachably provided by an appropriate method such as manual work or line work in a factory. This seal cap 11
Then, when a driver is inserted into the engagement hole 4A of the opening tab 4 or the opening tab 4 is pulled with pliers, the opening tab 4 is provided between the lid body 2 and the belt 3. First, the tear line portion 5 is torn from the end of the rising portion 5A, and the tear is transmitted to the circumferential portion 5B to separate the belt portion 3 from the lid main body portion 2. Further, even if a third party intentionally attempts to remove the entire seal cap 11 from the opening 7 of the drum can 6 from the opening tab 4, the tear line portion 5 between the lid main body portion 2 and the belt portion 3 is torn.

Therefore, according to the first embodiment, the seal cap 11 is provided with a substantially cylindrical cover body 2 having a bottom, a belt section 3 provided on the opening end side of the cover body section 2, 3 and a tear line portion 5 provided along the circumferential direction between the lid main body portion 2 and the belt portion 3.
, And made of plastic, the seal cap 11 can be easily sealed to the mouth 7 of the drum 6 by hand or the like (easy sealing property is secured). Even if a tool is not required, the seal can be easily opened (secure easy openability), and even if a third party intentionally removes the entire seal cap 11 from the mouth 7 of the drum 6, the tear line portion 5 is torn and opened. This can be easily recognized (the proof-proof property can be ensured), and the lid body 2 can be reused as a temporary lid. Lid body 2
Can be reused as a temporary lid, so that rainwater does not enter between the plug 8 and the mouth 7 from the temporary lid, and the drum can 6 can be stored outdoors. In the first embodiment, the drum 6
Has a constricted portion 7A at the base, and the constricted portion 3A of the belt portion 3 of the seal cap 11 is provided at the constricted portion 7A.
Is fitted, the seal cap 11 does not accidentally come off the mouth 7 of the drum 6 during transportation, and the seal stability is good.

Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is different from the first embodiment in that a notch-shaped concave portion 10 is formed in the tear line portion 5, but the other configuration is the same as the first embodiment. That is, the second
The seal cap 21 according to the embodiment has a structure including the lid main body 2, the belt 3, the opening tab 4, and the tear line 5, and the tear line 5 includes the rising portion 5A and the circle. It has a peripheral part 5B. One notch-shaped recess 10 is formed at the edge of the rising portion 5A (near the base end of the opening tab 4). In the second embodiment having this configuration, in addition to providing the same effects as the first embodiment, the notch-shaped concave portion 10 is formed in the rising portion 5A of the tear line portion 5, so that a third party can open the tear-open portion. Even if the seal cap 21 is forcibly opened from below the tab 4 using a screwdriver, the tear line portion 5 is cut from the notch-shaped concave portion 10, so that the pilfer proof property is improved as compared with the first embodiment. In addition, when the seal cap 21 is attached to the mouth 7 of the drum 6, the belt portion 3 is easily deformed outward, so that the easy sealing property is further improved.

Next, a third embodiment of the present invention will be described with reference to FIG. The third embodiment is different from the second embodiment in that a cutout recess 10 is formed in addition to the tear line portion 5, but the other configuration is the same as the second embodiment. That is, the seal cap 31 of the third embodiment has a structure including the lid main body 2, the belt 3, the opening tab 4, and the tear line 5, and the rising portion 5A of the tear line 5. Is formed at one edge of the belt portion 3, and a total of seven notch-shaped concave portions 10 are formed at the edge of the belt portion 3.
Is formed. These notched recesses 10 are arranged at equal intervals from each other. In the third embodiment having this configuration, the same effects as those of the second embodiment can be obtained, and the tear line portion 5 can be provided.
Since a total of eight notched concave portions 10 are formed at the edge of the rising portion 5A and the edge of the belt portion 3, a third party can open the driver from under the opening tab 4 for opening or from the edge of the belt portion 3. Even if the seal cap 21 is forcibly pryed open using notch, the notch-shaped concave portion 10 is cut, so that the pyri-proof property is improved as compared with the second embodiment, and the seal cap 21 is attached to the drum can 6. When the belt portion 3 is attached to the mouth portion 7, the belt portion 3 is more easily deformed to the outside, so that the easy sealing property is further improved.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. The fourth embodiment is different from the third embodiment in that a notch-shaped thin portion 12 is formed in place of the notch-shaped recess 10, but the other configuration is the same as that of the third embodiment. That is, as shown in FIG. 7, the seal cap 41 of the fourth embodiment has a structure including the lid main body 2, the belt 3, the opening tab 4, and the tear line 5, and A total of eight notched thin portions 12 are provided on the edge of the rising portion 5A of the wire portion 5 and the edge of the belt portion 3.
Are formed, and these notched thin portions 12 are arranged at equal intervals. The shape of the notched thin portion 12 is shown in FIG.
Is shown in In FIG. 8, the belt portion 3 has an outer edge 3B at an end edge thereof, and a notch-shaped thin portion 12 is formed in the outer edge 3B. The outer edge portion 3B where the notch-shaped thin portion 12 is formed may be integrally formed by injection molding, but is formed by ultrasonically welding a thin sheet to the belt portion 3 of the seal cap 21 of the second embodiment. It may be something. Notch-shaped thin portion 12 has a thickness of a thickness T ₃ of the other sites
It is about _four- sevenths of T4, and the inner end is located below the tear line 5. In the fourth embodiment of this configuration, the third embodiment
In addition to providing the same effect as the embodiment, a total of eight notched thin portions 12 are formed at the edge of the rising portion 5A of the tearing line portion 5 and the edge of the belt portion 3, so that a third party can open for opening. If the seal cap 21 is forcibly peeled off from under the tab 4 for use or from the edge of the belt portion 3 by using a screwdriver, the notch-shaped concave portion 10 is reliably cut. The proof property is further improved.

Next, experimental examples will be described to prove that the first to fourth embodiments achieve the above-described effects. This experimental example is similar to the first to fourth embodiments.
The examples and the conventional examples made of plastic were evaluated for easy sealing properties, sealing stability, easy-opening properties and pyrifaproof properties. Table 1 shows the results. Here, the easy sealing property means that the seal cap is attached to the mouth of the drum by hand, and in Table 1, the case where the seal cap can be attached very easily is indicated by ◎.
The case where it can be easily attached is indicated by ○, and the case where it is usually easy to attach but it takes time to attach if the method is bad is indicated by △. The term "seal stability" means that the seal cap is not easily opened by hand, and all Examples and conventional examples are good. Regarding the easy-open property and the pilfer-proof property, as shown in FIG. 9, (A) a driver is inserted into the engagement hole 4A of the opening tab 4 and the opening tab 4 is pulled, (B)
(C) Insert a screwdriver under the opening tab 4 and pry it open.
(D) The experiment was carried out by inserting a screwdriver under the edge of the belt portion 3 except under the opening tab 4 and prying it off. Among them, in the easy-open property, the case where opening was easy was indicated by 、, the case where opening was possible but was troublesome was indicated by △, and the case where opening was not possible was indicated by ×. In the pyrifa-proof property, when an attempt is made to remove the entire seal cap from the mouth of the drum can, a predetermined location is cut off and a case where it is clearly known that a third party has opened the package is indicated by a circle. A case where a predetermined portion is not cut off depending on the method is indicated by a triangle, and a case where the predetermined portion is not cut and it is not known that a third party has opened the box is indicated by a cross.

[0019]

[Table 1]

As can be seen from Table 1, in the first embodiment, if the method is not good with respect to the easy sealing property, installation may take time, but usually the installation is easy. In addition, the easy-open property was good in any of the methods (A) to (D), and the pyri-proof property was good in the cases (A) and (B). Also,
The seal stability was also good. In the second example, the easy sealing property, the sealing stability, and the easy open property were good, and the pyrifaproof properties were good in the cases (A) to (C). In the third embodiment, the seal stability and the easy-opening property are good, and the pilfer-proof property is good in the cases (A) to (C). Was sometimes not cut. Further, the easy sealing property was extremely good. In the fourth example, the seal stability, the easy-open property, and the pilaf-proof property were all good, and the easy seal property was extremely good. That is, the fourth embodiment was the most excellent among the embodiments. On the other hand, in the conventional example, the easy sealing property and the sealing stability were good, but neither the easy open property nor the pilaf proof property obtained a favorable result.

The present invention is not limited to the configuration of the above embodiment, but includes the following modifications as long as the object of the present invention can be achieved. For example, in the fourth embodiment, eight notch-shaped thin portions 12 are formed on the outer edge 3B of the belt portion 3, but in the present invention, as shown in FIGS. Belt part 3
May be formed in a belt shape over the entire circumference of the end portion of.
In this case, as shown in FIGS. 10 and 11, a plurality of holes 13 (8 in FIG.
Location) may be provided. In FIG. 10, a notch-shaped concave portion 10 is provided in the vicinity of the tab 4 for opening. Even if the notch-shaped thin portion 12 is formed, the number is not limited to eight as long as it is plural. Further, in the third embodiment, the number of the cutout recesses 10 is not limited to eight as long as it is plural.

In each of the above embodiments, the tear line 5
Is formed at the same height position as the upper edge of the constricted portion 7A of the mouth 7, but in the present invention, as shown in FIG. 12, the circumferential portion 5B is separated from the upper edge of the constricted portion 7A. It may be formed at a lower position. According to this, the edge of the lid main body 2 is engaged with the constricted portion 7A of the mouth 7, and when the lid main body 2 is used as a temporary lid, it is difficult to come off from the mouth 7. Further, as shown in FIG. 13, the engagement protrusion 2 </ b> B may be formed on the inner peripheral portion of the lid main body 2 at a position slightly higher than the circumferential portion 5 </ b> B. According to this, the engagement projection 2B of the lid main body 2 is engaged with the mouth 7 and the lid main body 2
When it is used as a temporary lid, it is difficult to come off the mouth 7.

Further, in the present invention, the container main body is not limited to a drum can as long as a plug is detachably provided at the mouth and a seal cap is attached to the outer peripheral portion of the mouth to cover the plug. Good. Further, the circumferential portion 5 </ b> B of the tear line portion 5 may be formed over the entire circumference between the cover main body portion 2 and the belt portion 3. Further, in the present invention, if a cut is formed near the opening tab 4 and the circumferential portion 5B is arranged close to the opening tab 4, the rising portion 5A of the tear line portion 5 will It does not necessarily need to be provided. Further, a plurality of opening tabs 4 may be provided.

[0024]

According to the present invention, the seal cap is provided with a substantially bottomed cylindrical lid main body, a belt provided on the opening end side of the lid main body, and an opening provided on the belt. Tab, and a tear line portion provided along the circumferential direction between the lid body portion and the belt portion, and made of plastic. The mouth can be easily sealed, the tab can be easily opened by pulling the tab for opening, even if there is no special tool, and even if a third party intentionally tries to remove the entire seal cap from the mouth of the container body, it is opened. Can be easily recognized, and the lid body can be reused as a temporary lid.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a seal cap according to a first embodiment of the present invention.

FIG. 2 is a plan view of the seal cap.

FIG. 3 is a front view of the seal cap.

FIG. 4 is a sectional view of the seal cap.

FIG. 5 is a perspective view showing a seal cap according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing a seal cap according to a third embodiment of the present invention.

FIG. 7 is a perspective view illustrating a seal cap according to a fourth embodiment of the present invention.

FIG. 8 is a sectional view of the seal cap.

FIGS. 9A to 9D are perspective views illustrating a method for opening a seal cap.

FIG. 10 is a plan view showing a seal cap according to a modification of the present invention.

FIG. 11 is a sectional view showing the seal cap.

FIG. 12 is a cross-sectional view showing a seal cap according to a different modification of the present invention.

FIG. 13 is a sectional view showing a seal cap according to still another modification of the present invention.

[Explanation of symbols]

 11,21,31,41 Seal cap 2 Lid main body part 3 Belt part 4 Tab for opening 5 Tearing line part 6 Drum can which is container main body 7 Mouth part 8 Plug 10 Notch recess 12 Thin part

Claims (3)

(57) [Claims] 1. A seal cap for use in a container body having a plug removably provided at a mouth thereof, the seal cap being attached to an outer peripheral portion of the mouth so as to cover the plug, the cover having a substantially bottomed cylindrical shape. A body portion, a belt portion provided on the opening end side of the lid body portion, a tab for opening provided on the belt portion, and a circumferential direction between the lid body portion and the belt portion. And a tear line portion provided, and is formed of plastic, and a thin portion is provided at an edge portion of the belt portion.
A seal cap characterized by being formed . 2. A container in which a plug is detachably provided at a mouth portion.
Used on the body, outside the mouth to cover the plug
A seal cap attached to the periphery, with a substantially bottomed
A cylindrical lid body and an opening end side of the lid body are provided.
Belt part and the opening tap provided on the belt part.
And the circumferential direction between the cover body and the belt.
And a tear line portion provided
Formed at the edge of the belt section.
A seal cap having a notched recess . 3. The seal cap according to claim 1, wherein the thickness of the tear line portion is two thirds or less of the thickness of the lid main body portion and the belt portion. Seal cap.