JP2003081314A - Cap seal for container such as drum can - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively produce a cap seal which is not easily removed having high hanging strength after mounting, seals surely and is not easily turned, is mechanically strong, does not form a gap between the bottom end of the hanging peripheral wall of the same and the top face of a top panel, and which prevents an unlawful removal of the cap seal, as to a cap seal easily mountable just by being placed on the metal cap of a container such as a drum can. SOLUTION: On a plurality of spots of a hanging peripheral wall 3 of a metal cap seal main body 2 peripheral edge, a through hole 4 and an annular rough protrusion 5 are provided. The protrusion 5 of the main body 2 is fitted to the outer projecting edge 15 of a fixing metal cap 10 top end in a condition where the same is fitted to the metal cap 10 of a container such as a drum can sealed by a plug 11. The protrusion 5 is formed by piercing.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cap seal for a container such as a drum can.

[0002]

2. Description of the Related Art Conventionally, for example, in a state in which a plug with packing is screwed into a flange of a mouthpiece portion of a drum can to seal the mouthpiece portion, a cap seal is fitted on the mouthpiece portion, and a hanging peripheral wall around the cap seal periphery is tightened by a tightening machine. Tightening is performed to deform the lower part of the hanging peripheral wall inward, and a cap seal is attached to the mouthpiece portion to seal the mouthpiece portion.

However, in such a conventional cap seal, it is necessary to use a tightening machine when mounting the cap on the drum can, and a tool is required for mounting the cap seal, which is troublesome to handle. There was a problem that it was troublesome.

Therefore, the present applicant has previously made a plurality of engaging projections on the hanging peripheral wall of the cap seal main body, which are engaged with the folded tip of the flange to be mounted on the mouthpiece of the drum can. A cap seal for a drum can provided has been proposed (see, for example, JP-A-9-110059).

The previously proposed cap seal has the advantage that the cap seal can be mounted by one touch manually without the need for a tool, and the handling is very simple.

[0006]

However, the above-proposed cap seal has the following new problems. That is, in the previously proposed cap seal, the engaging convex portion of the hanging peripheral wall of the cap seal body is formed by pressing a predetermined portion of the hanging peripheral wall inward by a so-called press work to swell. For this reason, in the previously proposed cap seal, when the engaging protrusion is formed by press working, the peripheral wall portion around the engaging protrusion is pulled to reduce the thickness of the peripheral portion, resulting in a decrease in mechanical strength. However, there is a problem that the value may slightly decrease. Further, when the engaging convex portion is formed by press working, the periphery of the convex portion,
In particular, when the hanging peripheral wall portion was pulled, a concave arc-shaped recess having a downward opening was formed at the lower edge portion of the hanging peripheral wall on the lower side of the convex portion. If there is such a dent on the lower edge of the hanging wall of the cap seal, when the cap seal is fitted over the fixed mouthpiece of the drum can and mounted, the lower edge of the hanging wall of the cap seal is fitted at this dented portion. There is a gap between the drum and the top plate of the drum can. Therefore, for example, a tool such as a screwdriver can be inserted into this gap to remove the cap seal illegally, thus impairing the sealing function of the drum can mouthpiece by the cap seal. There was a problem of fear.

An object of the present invention is to provide a cap seal for a container such as a drum can, which solves the above problems of the prior art.

[0008]

In order to achieve the above object, a cap seal for a container such as a drum according to the present invention is provided with through holes and a plurality of through holes at a plurality of positions on a peripheral wall of a metallic cap seal main body. An annular jagged protrusion protruding into the main body at the peripheral portion is provided, and in a state where the cap seal main body is fitted over the fixed mouthpiece part of the container such as a drum can closed by the plug, each annular jagged protrusion of the hanging peripheral wall is It is characterized in that it is adapted to be engaged with the outward convex edge portion of the upper end of the fixed base portion.

In the cap seal for a container such as a drum can according to the above-mentioned claim 1, each annular jagged protrusion of the hanging peripheral wall of the cap seal body is formed by piercing which pierces the hanging peripheral wall from the outside with a tool. Is desirable.

The cap seal body is made of a metal plate such as steel or aluminum, and has a thickness of, for example, about 0.2 to 0.4 mm.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described.
A description will be given with reference to the drawings.

1 to 4 show a first embodiment of the present invention. In addition, the top plate (21) of the drum can is usually
Two caps (10) of different sizes, or two caps (10) of the same size are provided, but in this embodiment, the cap (10) of the larger one is shown.

The cap seal (1) according to the invention is shown in FIG.
As shown in Fig. 4, the through holes (4) and the through holes (4) are provided at four locations on the circular cap seal body (2) at the periphery of the circular cap seal body (2) when viewed from the plane of steel having a thickness of about 0.2 to 0.4 mm. Hole (4)
An annular jagged protrusion (5) having a diameter of, for example, 1.0 to 3 mm is provided at the periphery of the cap seal body (2) so as to protrude inward.

Further, a hanging peripheral wall of the cap seal body (2)
An annular step (7) is provided between (3) and the circular top wall (6),
Cap seal main body (2) One side of the peripheral hanging wall (3) has an opening knob connected to the lower end of the hanging peripheral wall (3) and having a circular through hole (9) for inserting a finger of a human hand. (8) is provided so as to project outward. In addition, it should be located on both left and right sides of the opening knob (8) and parallel to each other to the hanging peripheral wall (3), the annular step (7) and the circular top wall (6) of the cap seal body (2). Book break cuts (18) (18) are provided.

It should be noted that, here, the two annular knurled protrusions (5) (5) close to the opening knob (8) on one side of the cap seal body (2) and on both sides of the notch (18) (18) for breaking. The space between them is about 80 ° around the center of the circular top wall (6) of the cap seal body (2) (A2), and the remaining two annular knurls ( 5) (5) are spaced from each other at an angle (A1) of about 120 °.

Next, as shown in FIG. 2, a drum can top plate
In the fixed mouthpiece part (10) of (21), the top plate (21) is provided with a circular rising tubular part (22) when seen from a plane, and an annular step part (23) is provided in the middle part of its height. ing. And top plate (21)
Inner screw type press-fitting type flange (fixed base) (14) is press-fitted into the rising tube part (22) of
5) is bent outwards and the upper edge of the rising tube (22)
By being wound around the (22a), the flange upper edge folded back tip portion (outer convex edge portion) (15) rises and is made to protrude annularly outside the standing cylinder portion (22). Between the flange (16) at the lower edge of the press-fitting flange (14) and the annular step (23), the gasket (24)
Is enclosed. Further, the outer peripheral edge of the flange (14) at the lower edge of the flange (14) has an octagon when viewed from the plane, and this is an octagonal detent hem that is octagonal when viewed from the plane continuous with the outer peripheral edge of the annular step (23). It is engaged in the department (25). Press fit type flange (1
The female thread (17) of 4) has a plug with a packing (12).
The male thread (13) of (11) is screwed in, and the packing (12)
Is closely attached to the inner peripheral surface of the upper edge of the opening of the flange (14).

In order to mount the cap seal (1) according to the present invention on the fixed base (10) of the drum, which is sealed by the plug (11) with the packing (12), the fixed base (1)
The cap seal (1) may be fitted over the (0) and pressed down downward.

As a result, the four annular knurled protrusions (5) of the depending peripheral wall (3) of the cap seal body (2) are respectively caused by the elasticity of the metal plate material of the depending peripheral wall (3).
0) Once it has been pushed outward along the outward convex edge (15) at the upper end and beyond the outward convex edge (15) downward, the hanging peripheral wall
The (3) is restored to its original state, and each annular jagged protrusion (5) is engaged with the outer convex edge (15) from below.

FIG. 3 shows an enlarged vertical sectional view of the annular knurled protrusion (5), and FIG. 4 shows an enlarged horizontal sectional view of the annular knurled protrusion (5) engaged with the outer convex edge (15) from below. The figure is shown.

As will be described later, the cap seal body (2)
Since each annular knurled protrusion (5) of the hanging peripheral wall (3) is formed by so-called piercing, the thickness of the rising portion (A) of the annular knurled protrusion (5) is as shown in FIG. , Not less than the original plate thickness, and annular jagged protrusion
(5) The thickness of the nearby hanging wall (C) is not smaller than the original plate thickness of the cap seal body (2), so the cap seal (1) is provided with an annular jagged protrusion (5). Nevertheless, it has very high strength. Also,
Since the tips (B) of the ring-shaped knurled protrusions (5) are very sharp, the rising cylinder portion (22) of the drum can top plate (21) is
Since the upper edge of the rising tubular portion (22) is strongly pressed against the peripheral surface of the upper edge portion (22) of the rising tubular portion (22), the upper end portion of the flange upper edge folded portion (15) has a very strong hooking strength and is difficult to remove. Further, due to the presence of these four annular knurled protrusions (5), the cap seal (1) itself can be prevented from rising and rotating around the peripheral surface of the tubular portion (22), and a reliable sealing action can be achieved. .

As shown in FIG. 4, a: drum can top plate
Outer diameter of the rising tubular part (22) of (21), b: Outer diameter of the flange upper edge folded tip (15) of the upper edge of the rising tubular part (22), c: Hanging shape of the cap seal body (2) Inner diameter of the peripheral wall (3), d: annular knurled protrusions (5) provided at four locations on the depending peripheral wall (3)
If defined as the inner diameter of a virtual circle connecting the tips of,
It is preferable that d> a. Also, e: ba is 1.0 to 1.5 mm for the large size cap seal (1) and 0.8 to 1.0 mm for the small size cap seal (1) of the two sizes. Is. f: c-
b is 0.3 for large size cap seal (1)
.About.0.5 mm, and for a small size cap seal (1), it is about 0.2 to 0.4 mm. g: ca is 2 mm or more for the large size cap seal (1),
For the cap seal (1) having a small size of 2.5 mm or less, it is preferably 1.5 mm or more and 2.0 mm or less.

In addition, b: There is a variation in the outer diameter dimension of the flange upper edge folded back tip portion (15) of the upper edge portion of the rising tubular portion (22). For example, in the case of a large size cap seal (1), it is 6
8.8 to 69.8 mm, small size cap seal
In (1), it is about 34.8 to 35.8 mm, but there is severe unevenness at the tip of the annular burr projection (5) of the hanging peripheral wall (3) of the cap seal body (2). This has the advantage of being able to absorb variations in the outer diameter dimension of the bent upper edge of the flange (15).

After the cap seal (1) is attached, the lower end portion (D) of the hanging peripheral wall (3) of the cap seal body (2) is the circular rising tubular portion (22) of the drum can top plate (21). It is brought into contact with the upper surface of the stepped portion (23) (see Fig. 2), and therefore the cap seal (1) cannot be easily opened unless it is broken, and the sealing function is surely fulfilled. You can

This is because in the present invention, the annular knurled protrusion of the hanging peripheral wall (3) of the cap seal body (2) is used.
Since (5) is formed by so-called piercing, the lower end (D) of the hanging peripheral wall (3) of the cap seal body (2) is located below the annular jagged protrusion (5) in FIGS. 3 and 2. ) Remains flat, unlike the case where the concave deformed portion having the downward opening is formed by pulling upward along with the formation of the convex portion as in the conventional press working. Therefore, when the cap seal (1) is fitted over the fixed base (10) of the drum can and installed, the hanging peripheral wall of the cap seal (1) is
Lower end (3) of (3) and rising tube (22) of drum top plate (21)
There is no gap between the upper surface of the annular step (23) and the
Unauthorized removal of the cap seal (1) can be prevented in advance, and the drum can mouthpiece sealing function can be reliably achieved.

Next, in order to open the mouthpiece part (10) of the drum can top plate (21) thus equipped with the cap seal (1), the circular hole of the opening knob (8) of the cap seal (1) is opened.
Insert your finger into (9) and lift the knob (8). As a result, the cap seal main body (2) is easily broken from the two notches (18) (18) for breaking on both sides of the opening knob (8), and subsequently, the cap (8) is lifted to remove the cap. The seal (1) can be easily removed.

As described above, according to the present invention, the cap seal (1) can be mounted and unsealed by one-touch operation without any tools, and the handling is very simple. In addition, a reliable sealing function can be achieved, and thus a quality compensation function of the drum can contents can be reliably achieved. Furthermore, the mounting of the cap seal (1) can be easily automated, and the equipment therefor is simple and inexpensive.

In this embodiment, as shown in FIG. 2, an annular lining gasket (19) is provided on the inner peripheral surface of the annular step (7) above the hanging peripheral wall (3). Such a lining gasket (19) is made of an elastic material such as synthetic rubber, various compounds or synthetic resins. Further, as such an annular gasket (19),
A separately formed ring-shaped gasket may be attached to the inner peripheral surface of the hanging wall (3) by fitting or by an adhesive.

As described above, in this embodiment, the mouthpiece portion (10) of the drum can is reliably sealed by the double sealing material of the packing (12) and the annular lining gasket (19). It is possible to reliably prevent rainwater collected on the upper surface of (21) from entering the inside of the drum can, and also to prevent leakage of the contents of the drum can that is lying down, and also to prevent the plug (11) No water or dust collects in the gap between the peripheral surface of the packing (12) and the upper end of the opening of the flange (14), and these water and dust impair the quality of the drum contents. There is no.

Further, since the annular jagged protrusion (5) of the depending peripheral wall (3) of the cap seal body (2) has a through hole (4), the cap seal body is passed through the hole (4).
Since the air inside the depending peripheral wall (3) of (2) is discharged to the outside, so-called white rust is generated even when using, for example, a unichrome plated plug (11) or a press-fitting type flange (14). Has the advantage of being less likely to occur.

Further, in this embodiment, for example, iron is used as the material of the cap seal (1), so that the surface of the cap seal body (2) is plated with unichrome plating or the like to prevent rust. Further, for example, even when the iron cap seal (1) is rusted due to long-term use, the iron cap seal (1) can be scrapped and easily regenerated, and the iron cap seal (1) can be easily regenerated.
Has the advantage of being environmentally friendly as it eventually becomes rust and disappears into the soil.

The method of manufacturing the cap seal (1) according to the present invention is as follows.

That is, first, the circular top wall (3) of the cap seal body (2), the annular stepped portion (7) and the hanging peripheral wall (3) at the periphery thereof are formed by press molding, and the hanging peripheral wall (3 ) Opening tab with a circular hole (9) on one side
(8) is formed. In addition, two parallel cuts (18) (18) for breaking, which are located on both the left and right sides of the opening knob (8), are provided on the hanging peripheral wall (3), the step (7) and the step (7) of the cap seal body (2). Top wall
Provided in (6).

Next, as shown in FIG. 5, the piercing die (30) is placed by hanging the hanging peripheral wall (3) of the cap seal body (2) on the side edge portion (30a) of the die. , The top wall (6) of the cap seal body (2) was placed vertically and the hanging peripheral wall (3) was placed horizontally, and the top side of the die side edge (30a) was opened upward. For example, in the bottomed hole (31) having a diameter of 1.5 to 3 mm, the tip of the tool (32) consisting of a punch is driven from above the penetrating peripheral wall (3) and penetrates into the pendent peripheral wall (3). An annular jagged protrusion having a diameter of 1.0 to 3 mm, which is formed at the peripheral portion of the hole (4) and which is formed inward at the periphery of the hole (4).
(5) is formed. Then, the hanging peripheral wall (3) is rotated by a required angle along the die side edge portion (30a) to form the hanging peripheral wall.
Place the part to be drilled next to (3) so that it is located above the bottomed hole (31) of the die side edge (30a) top wall, and in the same manner, the tip of the tool (32) consisting of a punch. By driving the parts, a total of four annular jagged protrusions (5) are sequentially formed.

According to the above method, the cap seal (1) having the annular jagged protrusion (5) of the present invention can be easily manufactured, so that the manufacturing cost of the cap seal (1) is low. Is.

FIG. 6 shows a cap seal (1) according to the present invention.
2 shows a second embodiment of the present invention. Here, what is different from the case of the first embodiment is the number and arrangement of the annular jagged protrusions (5).

That is, nine annular knurled protrusions (5) are provided on the depending peripheral wall (3) of the cap seal body (2). And the cap seal body (2) Opening knob on one side
An annular knurled protrusion (5) is provided on the hanging peripheral wall (3) facing the (8), close to the opening knob (8) and on both sides of the breaking notch (18) (18). Angle of about 80 ° (A
A pair of annular knurled protrusions (5) and (5) are provided at intervals corresponding to 2), and further, they are located on the opposite side of the opening knob (8) and are about 120 mm apart from each other. A set of two annular knurled protrusions at intervals corresponding to the angle (A1) of °
(5) (5) is provided. As described above, by providing two sets of the annular jagged protrusions (5) (5) close to each other, for example, at a distance of 4 to 10 mm, the cap for the fixed mouth ring (10) of the drum can top plate (21). There is an advantage that the mounting strength of the seal (1) is further increased.

FIG. 7 shows a cap seal (1) according to the present invention.
3 shows a third embodiment of the present invention. Here, the point different from the case of the first embodiment is that the cap seal (1) is attached to the small cap portion (10) of the drum can top plate (21) and the cap seal body (2) is It is the point that the hanging peripheral wall (3) is provided with three annular knurled protrusions (5).

That is, between the two annular knurled protrusions (5) (5) close to the opening knob (8a) on one side of the cap seal body (2) and on both sides of the notch (18) (18) for breaking. Is about 8
These 2 are spaced at intervals corresponding to an angle of 0 ° (A2).
An angle (A3) of approximately 140 ° is provided between the two annular knurled protrusions (5) (5) and one annular knurled protrusion (5) located on the opposite side of the opening knob (8). Spaced. In this way, the small base (1
The cap seal (1) fitted to (0) may have a small number of annular knurled protrusions (5). Also, the opening knob (8a)
A hole (9a) for inserting a tool such as a screwdriver, which is seen in a plan view, is formed in the.

FIG. 8 shows a cap seal (1) according to the present invention.
4 shows a fourth embodiment of the present invention. Here, the points different from the case of the first embodiment are that the cap seal body (2) is not provided with an opening knob, and that the cap seal body (2) has an annular knurled portion on the depending peripheral wall (3). Protrusion (5)
Is that six are provided. These ring-shaped knurled protrusions (5) are, for example, two pieces at intervals of 4 to 10 mm.
A ring-shaped jagged protrusion provided at three locations in each set
(5) (5) are arranged at intervals corresponding to an angle (A1) of about 120 °.

Other points of the second to fourth embodiments are as follows.
Since it is the same as the case of the first embodiment, the same components are denoted by the same reference numerals in the drawings.

The cap seal (1) is usually made of steel, but it may be made of a metal plate such as aluminum.

The present invention can also be applied to the sealing of containers having the same kind of mouthpiece, such as gallon cans, in addition to drum cans.

[0043]

As described above, the cap seal for a container such as a drum can according to the present invention has a through hole and a peripheral portion of the hole protruding into the main body at a plurality of points on the peripheral wall of the metal cap seal main body. An annular jagged protrusion is provided, and the cap seal body is fitted over the fixed mouthpiece of the container such as a drum can sealed by a plug,
According to the present invention, the cap seal is attached to the mouth portion of a container such as a drum can by one-touch operation.Each annular jagged protrusion of the hanging peripheral wall is adapted to be engaged with the outward convex edge portion of the upper end of the fixed mouth portion. Needless to say, it can be mounted very easily with, but the tip of each of the annular burr projections (B) provided at multiple points on the hanging peripheral wall of the cap seal body is very sharp. Therefore, by strongly pressing (sticking) to the peripheral surface of the rising cylinder of the drum can top plate, the upper edge of the rising cylinder has a very strong hooking strength with respect to the tip of the flange upper edge folded back, and is difficult to remove. Moreover, due to the presence of the plurality of annular knurled protrusions, the cap seal itself can be prevented from rotating along the peripheral surface of the top plate rising tubular portion, and a reliable sealing action can be achieved.

Further, an annular jagged protrusion can be easily provided on the depending peripheral wall of the cap seal by so-called piercing, and the thickness of the rising portion (A) of the annular jagged protrusion is the same as the original plate of the cap seal body. The thickness of the hanging peripheral wall (C) near the annular knurled protrusion is not less than the original plate thickness, and therefore the cap seal has an annular knurled protrusion. , Which has a very high strength.

Furthermore, since the annular knurled protrusion of the depending peripheral wall of the cap seal body is formed by piercing, the lower end portion (D) of the depending circumferential wall of the cap seal body below the annular knurled protrusion is different from the conventional one. Unlike the case where the convex deformed portion is pulled upward with the formation of the convex portion to form the concave deformed portion of the downward opening like press working,
It remains flat, and therefore, when the cap seal is fitted over the fixed base of the drum can, the lower end (D) of the hanging peripheral wall of the cap seal and the upper surface of the annular step around the rising cylinder of the drum can top plate. Since no gap is formed between the cap and the cap, it is possible to prevent unauthorized removal of the cap seal and to reliably perform the sealing function of the drum can mouthpiece.

Further, since a plurality of annular knurled protrusions can be easily formed on the depending peripheral wall of the cap seal body by piercing, the cap seal can be manufactured at a low cost.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a cap seal showing a first embodiment of the present invention.

FIG. 2 is an enlarged vertical cross-sectional view of a main part of a drum can mouthpiece equipped with a cap seal of the present invention.

FIG. 3 is an enlarged vertical sectional view of an annular jagged protrusion portion of the cap seal of FIG.

FIG. 4 is an enlarged horizontal sectional view of an annular jagged protrusion portion of the cap seal.

FIG. 5 is a partial enlarged cross-sectional view of a die showing the manufacturing process of the cap seal of the present invention.

FIG. 6 is a plan view of a cap seal showing a second embodiment of the present invention.

FIG. 7 is a plan view of a cap seal showing a third embodiment of the present invention.

FIG. 8 is a plan view of a cap seal showing a fourth embodiment of the present invention.

[Explanation of symbols]

1 Cap seal 2 Cap seal body 3 hanging peripheral wall 4 through holes 5 annular jagged protrusion 10 Fixed base 11 plugs 12 packing 14 Flange 15 Outer convex edge (Flanged upper edge folded tip) 21 Top plate 22 Rising tube 30 dice 31 bottomed hole 32 Punch (Piercing Tool)

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Claims (2)

[Claims] 1. A metal cap seal main body (2), a plurality of through-holes (4) at the peripheral edge of the peripheral wall (3), and an annular protrusion protruding into the main body (2) at the peripheral edge of the hole (4). Jagged protrusion
(5) and the cap seal body (2) is
The fixed base of the container such as a drum that is sealed by (11) (1
(0), the annular knurled protrusions (5) of the hanging peripheral wall (3) are attached to the outer convex edge (1) of the upper end of the fixed base (10).
Cap seal for containers such as drums, which is designed to be engaged with 5). 2. The hanging peripheral wall of the cap seal body (2)
The cap seal for a container such as a drum can according to claim 1, wherein each of the annular jagged projections (5) of (3) is formed by piercing the penetrating peripheral wall (3) from the outside with a tool.