JPH1120852A - Easy-to-open cap made of aluminum alloy - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-to-open cap made of aluminum alloy to be fixed to a container spout by caulking obtainable without increasing material cost and manufacturing cost, which can be easily detached from a spout of the container safely without using stick-like materials such as chopsticks and without injuring fingers. SOLUTION: A content take-out hole 13 provided on a top wall 11 is formed to have a size in which a person's finger can be put. A part of the opening edge part of the take-out hole 13 is made to be a lug piece 16. From the roots at both sides of the lug piece 16 to a predetermined part of a skirt part 12 through the top wall 11, a first score 17 and a second score 18 for inducting rupture are respectively formed, and almost all parts 22 of the opening edge part of the take-out hole 13 excepting the vicinities of the scores 17 and 18 are folded inward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container body containing powder and the like, which is fixed to the mouth of the container body by caulking, and when used, a sealing piece adhered to the top wall is peeled off to open the top wall. A simple openable aluminum alloy cap that can be used to open the takeout hole for the contents, especially when used and discarded, such that the entire cap can be easily removed from the mouth of the container body. The present invention relates to a simple opening type aluminum alloy cap.

[0002]

2. Description of the Related Art An aluminum alloy cap fixed by caulking to the mouth of a container body containing powders and the like, and a sealing piece adhered to a top wall thereof is peeled off.
2. Description of the Related Art A simple-opening-type aluminum alloy cap that can easily open a content taking-out hole provided on a top wall has been conventionally generally used, for example, in a bottle container for sprinkling.

In such a simple-openable aluminum alloy cap, after the contents are filled in the container body, the cap is put on the mouth of the container body, and the lower part of the skirt portion of the cap is inwardly positioned by a known crimper. The cap is fixed to the container mouth by caulking by bending it in the direction of reducing the diameter. In use, the sealing piece adhered to the top wall of the cap is picked up with a finger and pulled upward. Thus, by removing the sealing piece from the top wall of the cap, the take-out hole formed in the top wall of the cap is opened, and the contents (sprinkling, etc.) are taken out from the take-out hole.

In recent years, there has been an increasing demand for the separate collection of garbage. When disposing of used (container contents are empty and empty) containers, the container body and the aluminum alloy cap must be attached together. Since it is necessary to separate and dispose of the caps separately, even in the case of the simple opening type cap described above, a device for facilitating removal of the cap from the mouth of the used container is required. .

For this purpose, for example, a tab (tab) for opening is further extended from a part of the lower end of the skirt, and a pair of scores extending from the lower end of the skirt toward the top wall on both sides of the knob. (Notch line), and furthermore, a pair of slits emanating from the lower end of the skirt portion and stopping in the middle of the skirt portion on a line in a direction orthogonal to the opening direction of the knob piece, from the container mouth portion. It is considered that the cap can be easily removed.

However, when the opening tab (tab) further extending from the lower end of the skirt portion is provided, when manufacturing a product in which the contents are filled in the container using the cap, the contents are not changed. It is necessary to modify a part of the cap feeder (such as a sorter) in the filling equipment, and when manufacturing the cap itself, it is necessary to take extra blanks one by one from a large thin metal sheet as the material. The number of portions (tab portions) increases, and the yield of the material deteriorates, causing problems such as an increase in manufacturing cost and material cost.

[0007] Therefore, in an aluminum alloy cap provided with a hole for taking out contents from the top wall of the cap, the cap can be removed from the container mouth without providing a tab extending from the lower end of the skirt. By making it easier, there is no need for modification of the filling equipment, etc., so as to avoid deterioration of the material yield and obtain an inexpensive cap, a knob is provided inside the extraction hole of the cap top wall, From at least one of the roots on both sides of the knob, through the central flat portion of the cap top wall to a predetermined location of the annular protrusion,
The present applicant has already proposed an aluminum alloy cap having a score (notch line) for inducing a break. (See Japanese Utility Model Laid-Open Publication No. Hei 7-24752)

[0008]

According to the simple openable aluminum alloy cap proposed by the present applicant as described above, when used and discarded, the tab protruding inside the take-out hole is used. When the skirt is pulled up, a break occurs along the score extending from the base, and the break reaches from the top wall of the cap to the skirt, and as a result, the skirt is bent inward due to caulking. The clamp is released and the cap is easily removed from the container mouth.

[0009] However, as shown in Fig. 7, the removal operation using the knob is performed by a small hole provided in the knob and a rod-shaped member such as chopsticks.
When the work is somewhat difficult, and the bar-shaped member such as chopsticks may be damaged or broken, while the same work is performed with fingers without using the small hole of the knob or the bar-shaped member such as chopsticks In such a case, the workability is improved, but a finger may be injured by a knob or a metal piece forming an extraction hole.

An object of the present invention is to improve an aluminum alloy cap proposed by the applicant as described above. A simple openable aluminum alloy cap fixed to a container mouth portion by caulking is made of a material. The cap can be easily and safely removed from the container opening without increasing costs and manufacturing costs, and without using rod-shaped members such as chopsticks, and without injuring a finger. Is the subject.

[0011]

According to the present invention, in order to solve the above-mentioned problems, as described in the above-mentioned claim 1, a skirt portion is formed from the periphery of the top wall, and the skirt portion is formed on the top wall. A take-out hole for the contents is opened, a sealing piece covering the take-out hole is releasably adhered to the upper surface of the top wall, and a sealing material is attached to at least a peripheral portion of the lower surface of the top wall, and covers the container opening. In a simple-openable aluminum alloy cap that is fixed to the container mouth by bending the lower part of the skirt part inward in the diameter direction, the hole for taking out the contents opened on the top wall allows human fingers to enter. It is formed in a size of about,
With respect to the extraction hole, a part of the opening edge of the extraction hole is used as a knob, and the first score and the second score of the rupture invite are drawn from the base on both sides of the knob to a predetermined portion of the skirt through the top wall. Two scores are engraved, and most of the opening edge of the extraction hole except for the vicinity of each score is bent inward.

Further, in the aluminum alloy cap of the simple opening type according to the first aspect of the present invention, as described in the second aspect, the first score reaches the lower end of the skirt portion and the end of the score. An inverted V-shaped notch connected to the skirt portion is formed at the lower end of the skirt portion, and the second score is bent in a direction away from the first score after reaching the skirt portion, and is terminated in the middle of the skirt portion. It is characterized by having.

[0013] Further, in the aluminum alloy cap of the simple opening type according to the second aspect, as described in the third aspect, further away from the first score than the position where the second score ends. A slit is provided at a position so as to extend from a lower end of the skirt portion and extend upward to an appropriate position of the skirt portion.

Further, in the simple opening aluminum alloy cap according to any one of the first to third aspects, as described in the fourth aspect, the inner surface of the top wall of the cap may be
At least a portion pulled up from the mouth of the container due to breakage of the first score and the second score has been subjected to an adhesive strength reducing treatment for reducing the adhesive strength of the seal material. is there.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a simple opening type aluminum alloy cap according to an embodiment of the present invention.

FIGS. 1 and 2 show an embodiment of an easily opened aluminum alloy cap according to the present invention in an unused state before being attached to a mouth of a container body. A thin plate made of an aluminum alloy is press-formed, and a top wall 11 of the cap has a substantially flat central portion 11a and an inclined portion 1 connected to an outer edge of the central portion 11a.
1b and an annular protrusion 11c protruding above the central portion 11a by the inclined portion 11b. A skirt portion 12 is integrally formed from the periphery of the top wall 11 (the outer periphery of the annular protrusion 11c). ing.

The top wall central portion 11a of such a cap 1
Has a take-out hole 13 for taking out the contents, and a sealing piece 14 covering the take-out hole 13 is peelably adhered to the upper surface of the top wall central portion 11a by a heat-sensitive adhesive. While the peripheral portion of the top wall 11 (inclined portion 1
From 1b to the lower surface of the annular projection 11c), a sealing material 15 made of an organic polymer is attached.

One end of a sealing piece 14 is provided at the center 11a of the top wall 11 between the inclined portion 11b and the extraction hole 13 so as to be aligned with the extraction hole 13 on a line passing through the center of the top wall 11. Recess 11d for making knob portion 14a floating
However, it is formed so as to be recessed one step below the flat surface around it.

In this embodiment, specifically, the cap 1 is made of a 0.18 mm-thick aluminum 3004 material and press-molded to a size of 64.4 mm in outer diameter and 6.1 mm in height. The sealing piece 14 is made of aluminum foil 4
A 0 μm laminated material is used, and a vinyl chloride compound is used as the sealing material 15.

In the cap 1 of the simple opening type as described above, the take-out hole 13 which is covered by the sealing piece 14 and is closed before use is provided with the top wall 11 in the present embodiment.
On the side close to the recess 11d, a part of the opening edge of the extraction hole 13 is projected in an arc shape inward, thereby forming an arc-shaped knob 16 with an edge portion.

With respect to the extraction hole 13 in which the knob 16 is formed, the top wall 11 of the cap 1 has a knob 16
Two scores (scoring lines) 17 and 18 are engraved, respectively, starting from the roots at both ends of the arc-shaped edge portion of the score, and each score (first score 17 and second score 1)
8) extend parallel to the side opposite to the extraction hole 13 and cross each of the concave portions 11d formed in the central portion 11a of the top wall, and thereafter, the inclined portion 11b of the top wall 11 and the annular protrusion are formed. It reaches the skirt part 12 via 11c.

As shown in FIG. 4, the scores 17, 18 reaching the skirt portion 12 are formed at the lower edge of the skirt portion 12 across the skirt portion 12 for the first score 17, as shown in FIG. Inverted V-shaped notch 19
On the other hand, the second score 18 curves outward (in a direction away from the first score 17) near the middle of the skirt portion 12 and extends to a predetermined location.

At the time of breaking, the central portion 1 of the top wall 11
Since the lid opening force is increased at the time of transition from 1a to the annular projection 11c, when the above-described scores 17, 18 are carved, the second score 18 finishes curving outward from the portion of the second score 18 that is applied to the annular projection 11c. It is preferable to form the portion of the central portion 11a until it becomes parallel to the cross section of the center portion 11a so that the remaining score thickness becomes thinner, and to form a step in the remaining score thickness.

In this regard, in this embodiment, for example, the fact that the remaining score thickness is 140 ± 10 μm is engraved as a molding target value, and the portion where the lid opening force is high is 20 μm more than this. It is so thin.

The inverted V-shaped notch 19 provided at the lower end of the skirt portion 12 and connected to the end of the first score 17 may be injured at this portion during and after the score 17 is broken. In order to eliminate the possibility that the notch 19 is formed, the portion is caulked after the notch 19 is formed so as to form an inverted V-shape. In the present embodiment, the depth d of the cut is about 1 mm, and the corner portion 19 in contact with the score 17 is formed.
a to R0.388, corner portions 1 on both sides of the lower end of the skirt
9b are each formed into R0.9.

Further, in this embodiment, as shown in FIG. 4, the position of the knob 1 is further away from the position where the breaking of the second score 18 is stopped than the position where the breaking of the second score 18 is stopped.
6 within the range where the lifting force at the time of breaking is exerted, it is emitted from the lower end of the skirt portion 12 to the right place of the skirt portion 12 (without impairing the sealing performance of the cap 1 with respect to the container mouth, and the crimping of the skirt portion 12 due to crimping). (A position where it can be released)
20 are formed.

In the present embodiment, a small hole 21 is formed substantially at the center of the knob 16, and at least the first score 17 and the first score 17 on the lower surface of the top wall 11 of the cap 1 are formed. The portion which is lifted from the opening of the container due to the breakage of the 2 score 18 is subjected to an adhesive strength reducing process for reducing the adhesive strength of the seal material 15.
(Specifically, an epoxy paint is coated.)

In the cap 1 of the present embodiment configured as described above, almost all of the opening edge of the extraction hole 13 (including the edge of the knob 16) except for the vicinity of the scores 17 and 18. Inward bending (in the present embodiment, bending toward the lower surface side of the top wall 11) is performed, and the width of the bent portion 22 is about 1 mm.
It has become about.

Since this bending is to improve the safety at the time of separating the cap 1 and the container main body, it is essential that the opening edge of the outlet 13 (the knob 16 is removed). It is desirable to bend the entire periphery of the opening (including the edge). However, in order to prevent molding problems and score cracking during molding, the opening edge of the opening 13 (except for the starting ends of the scores 17 and 18). (Including the edge of the knob 16).

Now, although not shown, the cap 1 of the present embodiment having the above-described configuration is covered with the cap 1 at the mouth of the container body, and the lower part of the skirt portion 12 is inwardly moved by a known crimper. By being bent (inward in the diameter direction), it is fixed to the container mouth portion by caulking.

When the product is used, in order to take out the contents of the container, the knob 14a of the sealing piece 14 is picked up, and the sealing piece 14 is removed from the top wall 11 of the cap 1 (the outlet of the central portion 11a of the top wall). By peeling off from the upper surface (around 13), as shown in FIG. 3, the outlet hole 13 is opened, and then the contents are taken out through the outlet hole 13.

Further, when the contents of the container are exhausted and empty, as shown in FIG. 6, a finger is inserted into the extraction hole 13 of the cap top wall 11, and the knob 16 is directly pinched with a finger. By pulling up, the scores 17, 18 starting from the base of the knob 16 are broken, thereby releasing the crimp of the skirt portion 12 of the cap 1 with respect to the container mouth, and removing the cap 1 from the container mouth. Removed from.

That is, when the knob 16 is pulled up by a finger, the center line 11a of the cap is broken along the score lines 17 and 18 extending from the base of the knob 16 to the skirt portion 12. When the knob 16 is further pulled obliquely upward in the direction of the score lines 17 and 18, breakage along the score lines 17 and 18 further progresses, and finally the breakage of the first score line 17 occurs at the lower end of the skirt portion 12. While reaching the inverted V-shaped cut 19, the second score line 18 breaks in the vicinity of the middle stage of the skirt portion 12 on the opposite side to the first score line 17, and then breaks when reaching a predetermined location. Stop.

At this time, the score lines 17, 18 cross the concave portion 11d of the top wall 11, and the rigidity of the central portion 11a of the top wall at the concave portion 11d is high. Prevent swelling and score line 17,1
8 can be easily caused to break,
At least the score lines 17 and 1
For the part that can be lifted by the finger due to the breaking of 8,
Since the adhesive force reduction processing is performed, the breakage up to the skirt portion 12 can be easily advanced by easily peeling off the sealing material 15 at the relevant portion.

Then, as described above, the first score 17
Is completely cut from the take-out hole 13 to the lower end of the skirt portion 12 on the side of the skirt portion 12, so that the crimp of the cap 1 with respect to the container mouth portion is loosened. If the knob 16 is picked up and lifted upward, the entire cap 1 including the knob 16 can be easily removed from the container opening.

When the consumer removes the cap from the container opening, if the user continues to pull up in the same direction even after the first score 17 is completely broken,
The score 18 is derailed without being curved well (at a position where the skirt portion 12 curves away from the first score 17), the breakage proceeds in parallel with the first score 17, and the portion having the knob 16 is the cap body. Although it is conceivable that the opening edge of the take-out hole 13 is bent inward, it is possible to put a finger on the opening edge. By prying up the cap, the entire cap 1 can be easily and safely removed from the container opening.

According to the simple-opening-type aluminum alloy cap of the present embodiment as described above, the crimp of the skirt portion 12 due to caulking is released by breaking a part of the cap 1, and The cap 1 can be easily removed from the portion, and in particular, most portions 22 except for the vicinity of the scores 17 and 18 at the opening edge (including the edge of the knob) of the extraction hole 13 are bent inward. Therefore, in the operation of removing the cap 1, a finger may be inserted into the extraction hole 13 and the knob 16 may be pulled up, or a finger may be hung on the opening edge of the extraction hole 13 without fear of injury to the finger. Can be prying,
Compared to the case where the work is performed using a rod-shaped member such as chopsticks as shown in FIG. 7, the work can be easily performed without a risk of causing damage to the member.

Furthermore, since most of the opening 22 of the extraction hole 13 is bent inward, the opening edge of the extraction hole 13 that contacts the sealing piece 14 does not become a sharp edge. Thereby, tearing of the sealing piece 14 before opening due to contact with the opening edge of the extraction hole 13 can be reliably prevented.

In manufacturing the cap 1, the knob 16 and the bent portion 22 can be formed by leaving a part of the originally scrapped portion when punching out the extraction hole 13. In addition, the material yield is good, and in manufacturing a product using the cap 1, since the knob 16 for breaking the cap does not protrude outward, the outer peripheral shape of the cap 1 is smaller than that of the conventional one. Even if there is no change in the filling equipment or the like, the handling of the cap 1 will not be hindered in the step of filling the contents or the like.

In this embodiment, the first score 17
When the rupture reaches the lower end of the skirt portion 12, the crimp with the container mouth is released. In this case, an inverted V-shaped notch 19 having a fine R is provided at the end of the first score 17. Therefore, the portion does not become sharp so as to hurt a finger or a hand, and the safety at the time of later sorting work is improved.

In this embodiment, the second score 18
Is terminated in the middle of the skirt portion 12, so that the portions such as the knob 16 are also connected integrally,
As a result, the entire cap 1 can be removed from the container opening, and as a result, the operation for separating and discarding the cap 1 and the container body can be simplified.

In this embodiment, the second score 18
Since the slit 20 is provided at a position further away from the first score 17 than the position at which the score ends, the score 1
After the end of the rupture of the caps 7 and 18, the pick 16 is picked up and gently lifted upward, so that the slit 20 is opened and the crimp of the cap 1 with respect to the container opening is further released, thereby removing the cap 1 thereafter. The work becomes even easier.

Further, in the present embodiment, an adhesive force reduction for reducing the adhesive force of the seal material 15 to at least a portion pulled up from the opening of the container due to the breakage of the first score 17 and the second score 18. Because the treatment is performed, when the finger is inserted into the extraction hole 13 and the knob 16 is pulled up, the broken portion is easily peeled off from the sealing material 15.
Breaking along the scores 17 and 18 by the knob 16 can be easily advanced.

Further, in the present embodiment, since the small hole 21 is formed at the approximate center of the knob 16, the small hole 21 acts as a non-slip when the knob 16 is picked with a finger. In addition to the above, if necessary, the small piece 21 can be used to raise the knob 16 using a rod-shaped member such as chopsticks.

The embodiment of the aluminum alloy cap of the simple opening type according to the present invention has been described above. However, the present invention is not limited to the specific structure described in the above embodiment. For example, the shape of the knob 16 is not limited to the shape shown in the above-described embodiment, and the slit 20 of the skirt portion 12 can be formed with the cap and the container main body without any particular formation. It is needless to say that the design work can be changed as appropriate, for example, without making the removal operation extremely difficult, and further, the small holes 21 of the knob 16 need not be particularly formed.

[0046]

According to the simple opening aluminum alloy cap of the present invention as described above, since a part of the opening edge of the extraction hole is formed as a knob, a rod-shaped member such as chopsticks can be used. Without using it, the user can insert the finger into the removal hole and pull up the knob to release the crimp of the cap fixed to the container opening and easily remove the cap from the container body. Since the opening edge of the extraction hole including the portion is bent inward, such removal work can be performed without worrying about injury to the finger, and the extraction hole that comes into contact with the sealing piece. Because the opening edge of does not become a sharp edge,
Breakage of the sealing piece before opening can be prevented as much as possible.

In addition, as for the knobs and bent portions formed at the opening edges of the extraction holes of the cap, the parts which were originally scrap when forming the extraction holes are used, so that the material yield is reduced. As a result, the manufacturing cost of the cap can be reduced.

According to the second aspect of the present invention, the crimp of the cap fixed to the opening of the container is released by inserting a finger into the take-out hole and pulling up the knob, and then the knob is continuously selected. By lifting the piece upward,
The cap can be easily removed from the container body without separating it into two or more parts. Even if the knob is torn off by mistake, the opening edge of the extraction hole is bent inward. Therefore, the cap can be easily and safely removed from the opening of the container by putting a finger on the opening edge and prying the cap.

[Brief description of the drawings]

FIG. 1 is a top view showing an embodiment of a simple opening type aluminum alloy cap of the present invention before use.

FIG. 2 is a longitudinal sectional view of the cap shown in FIG. 1 taken along the line AA.

FIG. 3 is a top view showing a state after opening the cap shown in FIG. 1;

FIG. 4 is a side view of the cap shown in FIG. 1 as viewed from the direction of arrow B in FIG. 3;

FIG. 5 is a partially enlarged side view showing an inverted V-shaped cut formed at the lower end of the skirt portion so as to be connected to the end portion of the first score.

FIG. 6 is a perspective view showing an operation for breaking a score in the cap according to the embodiment shown in FIG. 1;

FIG. 7 is a perspective view showing an operation for breaking a score in a conventional cap proposed by the present applicant.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Aluminum alloy cap 11 Top wall 12 Skirt part 13 Removal hole 14 Sealing piece 15 Sealing material 16 Knob piece 17 1st score 18 2nd score 19 Reverse V-shaped cut 20 Slit 22 Inward bending part

Claims (4)

[Claims] 1. A skirt portion is formed by hanging from a peripheral edge of a top wall, a hole for taking out the contents is opened in the top wall, and a sealing piece covering the hole is detachably adhered to an upper surface of the top wall. A sealable aluminum alloy cap that has a sealing material attached to at least the peripheral portion of the lower surface and is fixed to the container mouth by covering the container mouth and bending the lower part of the skirt inward in the diameter direction. In the above, a hole for taking out the contents opened on the top wall is formed in a size enough to allow a human finger to enter, and a part of the opening edge of the hole is used as a knob for the hole. A first score and a second score for inviting breakage are respectively engraved from the roots on both sides of the knob to a predetermined portion of the skirt through the top wall, and each score of the opening edge of the extraction hole is provided. Most parts except the neighborhood
A simple openable aluminum alloy cap that is bent inward. 2. A first score reaches the lower end of the skirt, an inverted V-shaped notch connected to the end of the score is formed at the lower end of the skirt, and a second score reaches the skirt. The easily opened aluminum alloy cap according to claim 1, wherein the cap is bent in a direction away from the first score and ends in the middle of the skirt portion. 3. A slit is provided at a position further away from the first score than a position where the second score ends, so as to extend from a lower end of the skirt portion and extend upward to a proper position of the skirt portion. The simple-openable aluminum alloy cap according to claim 2, wherein the cap is made of aluminum alloy. 4. At least a first portion of the inner surface of the top wall of the cap.
4. An adhesive force reducing process for reducing the adhesive force of the seal material on a portion pulled up from the container mouth due to the breakage of the score and the second score. The easy-open aluminum alloy cap described in 1.