JP2002104408A - Metal can having openable/closable cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal can having an openable/closable cap with excellent appearance by integrally forming a can barrel with a seaming metal to improve the sealability, and omitting an upper seaming part of a can body. SOLUTION: In the can body comprising the cylindrical can barrel, a base plate of a bottom of the can barrel, and the ring-like seaming metal provided on an inner side of an upper end of the can barrel in a fitting manner with a top lid, the can barrel is integrally formed with the seaming metal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a metal cover in which a push-type opening / closing canopy is provided in the shape of a ring on the inner side of the upper end of a cylindrical can body in order to contain paints and chemical products which are required to have a high sealing property. More particularly, the present invention relates to a metal can having an open / close canopy in which a can body and a metal eye are integrally formed.

[0002]

2. Description of the Related Art Conventionally, in a metal can having a push-type opening / closing canopy for containing paints, chemical products, and the like, which are required to have a high sealing property, a single can is required because of its high sealing property and ease of opening / closing. What is called a lid type or a double lid type is used. The canopy is fitted inside the upper end of the cylindrical can body with a ring-shaped eye which is formed by drawing and opens and closes the can body. An annular skirt portion is formed, and in the case of a double lid type, an annular U-shaped groove is formed by drawing, and an annular rib having a U-shaped cross section that fits with a metal eye is formed by drawing on the canopy side, When the canopy is pushed in, the annular ribs of the canope are fitted on one side with the annular skirt portion of the eyepiece in the single lid type, and both sides are fitted in the annular U-shaped groove of the eyepiece in the double lid type. Therefore, in the double lid type, both sides of the annular U-shaped groove, that is, double sealing can be performed, and the sealing property is extremely high. The metal can having a canopy is generally formed of a can body and a canopy, except for a handle, and the can body is provided inside a cylindrical can body, a bottom plate at the bottom of the can body, and an upper end inside the can body. It is composed of a ring-shaped metal and a separate member. Moreover, the main body of the can is formed by winding and joining the main plate to the bottom and the metal to the upper end of the can body.

On the other hand, a conventional metal can is disclosed in
No. 216528 proposes a metal can in which the upper edge of the can body is wound inward or outward to form a bead, and an annular flange is formed integrally with the can body below the bead, thereby saving can material. It can reinforce the can mouth significantly.

[0004]

In the prior art, the main body of the can is composed of a can body, a main plate, and a metal eye.
The main plate or the metal wire must be joined to the can body by winding, and sometimes the sealing error, which is a characteristic of the metal can having the canopy, is hindered due to winding mistake or unevenness.
In addition, since the eye is substantially annular, the material at the center is unnecessary, and, as in the conventional case, the disk is formed by drawing into a desired shape, and when the center is pulled out, the material at the center is removed. It is wasted and material costs are high. Furthermore, if the can body is formed by joining with a separate member, the manufacturing process becomes complicated and the manufacturing cost increases, and it is difficult to form an accurate concentric shape by joining an annular metal as a separate member to the can body. Had the problem of

On the other hand, Japanese Patent Application Laid-Open No. H11-216528 relates to a metal can provided with an annular flange for fixing a partition plate or a partition film inside the vicinity of a can mouth portion. Unlike cans, in particular,
The annular collar of the metal can of No. 216528 is for attaching a partition plate (such as a film or foil), and the metal can of the metal can using the canopy is directly fitted with the canopy and is required to have high sealing performance. In addition, the structure is also required to have a sufficient strength for opening and closing the canopy, so there is a fundamental difference, and the above-mentioned problems with the metal can using the canopy still could not be solved.

SUMMARY OF THE INVENTION In view of the above problems, the present invention forms the can body and the eyepiece integrally, enhances the sealing performance, forms the eyepiece with a precise concentric shape, and eliminates the upper part of the can body that is tightened. It is an object of the present invention to provide a metal can having an open / close canopy that has a good appearance in appearance.

Another object of the present invention is to provide a metal can having an open / close canopy that can save material or reduce manufacturing costs.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a can body (2) having a cylindrical shape, a bottom plate (4) at the bottom of the can body (2), and a canopy (6). (2) In a can body (1) comprising a ring-shaped metal (3) provided inside the upper end, the can body (2) and the metal (3) are integrally formed. It is a metal can having a canopy for opening and closing.

Further, it is preferable that the metal eye (3) is formed of a can body (2) having a right cylindrical shape.

Further, it is preferable that the metal eye (3) is formed from a drawn can body (2).

An upper edge portion (5) formed by bending the can body (2) and the eye metal (3) is connected to the can body (2) side and the eye metal (3) side. It is good to make them adhere.

The terms used in the present invention are defined as follows.

[0013] The can body (2) is obtained by welding a metal plate material into a cylindrical shape and overlapping the overlapped portion.
Alternatively, a metal plate is deep-drawn into a cylindrical shape. Tin metal or tin-free steel is usually used as the metal plate, but other metal plates may be aluminum, stainless steel, or the like.

The eye metal (3) is provided in a substantially ring shape inside the upper end of the can body (2), and is fitted to the U-shaped annular rib (6a) of the canopy (6) so as to be freely opened and closed. It is for the single lid type and the double lid type in which the annular U-shaped groove (3a) or the annular skirt portion (3b) is formed, and is the same material as the can body (2).

Further, the canopy (6) refers to an annular rib (6a) having a U-shaped cross section which can be fitted to the annular U-shaped groove (3a) or the annular skirt portion (3b) of the metal eye (3). Refers to the formed canopy and serves to seal the opening of the can body (1).
When the lid is closed, one side of the annular rib (6a) and the annular skirt portion (3b) of the eyelet (3) are fitted in the single lid type, but in the double lid type, the annular shape of the eyelet (3) is fitted. The U-shaped groove (3a) and the annular rib (6a) of the canopy (6) fit tightly and the annular U
The double-sided contact between the groove (3a) and the annular rib (6a) provides high sealing performance.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a double-lid type embodiment of the present invention, FIG. 2 is a front view showing a single-lid type embodiment, and FIG. FIG. 4 is an explanatory view of forming the can of the present invention from a drawn can, FIG. 5 is an explanatory view showing an upper edge portion of the eye of the present invention, and FIG. 6 is a canopy of the present invention. FIG. 7 is an explanatory view showing a closed state of a double lid type can of the present invention, and FIG. 8 is an explanatory view showing a closed state of a single lid type of the present invention.

In FIGS. 1 and 2, (1) is a metal can body, and the can body (1) is a cylindrical can body (2).
And a metal plate (3) integrally formed inside the upper end of the can body (2), and a main plate (4) wound and joined to the bottom of the can body (2). 2) The metal eye (3) and the base plate (4) are the same metal plate material, and the metal plate material used is tin, tin-free steel, aluminum, stainless steel, etc., and in particular, tin is a can material. Often used.

The can body (2) has a metal plate material which is obtained by rolling a metal plate material into a cylinder and overlapping or abutting both ends thereof and joining the portions by welding (see FIG. 3). There is a bottom cylindrical shape that has been deep drawn and has no joining (see FIG. 4).

The metal eye (3) has an annular U-shaped groove (3a) formed by drawing in a double lid type inside the upper end of the can body (2), and the innermost rising end is wound outward. It is formed on a curved bead (3c). In the single lid type, an annular skirt (3b) is formed, and a lower portion of the annular skirt (3b) is formed on the bead (3c). 3) is formed integrally with the can body (2).

As shown in FIG. 3, the metal eye (3) is formed from a straight cylinder of the can body (2) to an iron metal eye (3) in the case of a double lid type. They are integrally formed. When the metal eye (3) is formed from the straight cylindrical can body (2), the material in the central portion is not wasted in the processing of the metal eye (3) as in the conventional case, and the material can be saved. Possible, coupled with increased manufacturing efficiency, resulting in lower costs.

Further, as shown in FIG.
However, it is good to form from the can body (2) which carried out the deep drawing of the board material.
In this case, since the metal eye (3) is formed using the bottom of the deeply drawn can body (2), the above-described straight cylindrical can body (2) is used.
From the viewpoint of forming the metal eye (3) itself, the rigidity of the can body (2) is high and the metal eye (3) is not easily deformed during the processing of the metal eye (3). Because the concentricity with the can body (2) in the drawing process of the annular U-shaped groove (3a) and the annular skirt portion (3b) is increased, a metal can with high precision can be manufactured, and the can body (2) is also seamless. The sealing performance in the can body (2) also increases.

Since the above-mentioned metal eye (3) is formed integrally with the can body (2), the sealing performance of the can body (1) is improved as compared with the case where the metal eye (3) is wound. It is advantageous.

FIG. 5 shows that the upper edge (5) of the upper end of the can body (1) formed by bending the can body (2) and the eye (3) is on the side of the can body (2). And the eye (3) side. Accordingly, when a canopy (6) described later is opened, even if a screwdriver or the like is inserted into a gap between the eye (3) and the canopy (6) to pry open the upper edge (5) as a fulcrum, the upper edge ( 5) has the same strength as the tightly wound state without sagging due to the close contact as described above. Further, at the upper edge (5) of such a structure, when the canopy (6) is closed by press-fitting, considerable force is applied to the eye (3) from above, and the eye (3) sinks into the can. Is easier to do,
In the upper edge portion (5) in the close contact state, this can be prevented also in terms of strength. Although FIG. 5 shows the case of the double lid type, although not shown in the case of the single lid type, the upper edge (5) is not shown.
When the can body (2) and the metal (3) side are brought into close contact with each other, the same operation and effect as those of the double lid type can be obtained.

FIG. 6 shows a cross-sectional shape of a metal canopy (6). In the figure, (6a) shows an annular U-shaped groove (3a) or an annular skirt (3b) of a metal eye (3). The U-shaped annular rib fits snugly, and (6b) is an outwardly wound bead. The configuration of this canopy (6) is the same as the conventional one, so further description is omitted. .

FIG. 7 shows a double lid type in which the can lid (6) is closed in the can main body (1), and the can (3)
The annular rib (6a) of the canopy (6) is fitted into the annular U-shaped groove (3a), and both sides of the canopy (6) are double-contacted with each other.

FIG. 8 shows a single lid type in which the canopy (6) is closed on the can body (1). The canopy (6) is attached to the annular skirt portion (3b) of the metal eye (3). One side of the annular rib (6a) is fitted.

[0028]

According to the present invention constructed as described above, since the can body (2) and the eye (3) are formed integrally, the sealing performance of the can body (1) is further improved, and The annular U-shaped groove (3a) or the annular skirt (3b) of the metal eye (3) can be accurately formed concentrically with the body (2), and there is no winding part at the upper end of the can body (1). Will look good.

Further, the metal eye (3) formed from a straight cylindrical can body (2) saves material, while the metal eye (3) is formed from a deep-drawn can body (2). The method facilitates the workability of the metal eye (3), and the two can be continuously worked in a series of flows.

[Brief description of the drawings]

FIG. 1 is a front view showing a double lid type embodiment of the present invention.

FIG. 2 is a front view showing a single lid type embodiment of the present invention.

FIG. 3 is an explanatory view of forming the metal eye of the present invention from a straight cylindrical can body.

FIG. 4 is an explanatory view of forming a can of the present invention from a drawn can body.

FIG. 5 is an explanatory view showing an upper edge portion on the metal side of the present invention.

FIG. 6 is a cross-sectional view of the canopy of the present invention.

FIG. 7 is an explanatory view showing a closed state of the double lid type can of the present invention.

FIG. 8 is an explanatory view showing a closed state of a single lid type can according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 can body 2 can body 3 eye 3a annular U-shaped groove 4 main plate 5 upper edge 6 canopy

Claims (4)

[Claims] 1. A can body (2) having a cylindrical shape, a base plate (4) at the bottom of the can body (2), and a canopy (6) provided inside the upper end of the can body (2) so as to be fitted therewith. A metal can having an open / close canopy, wherein the can body (2) and the eye (3) are integrally formed in a can body (1) comprising a ring-shaped eye (3). 2. The can (2) wherein the eye (3) has a straight cylindrical shape.
A metal can having the open / close canopy according to claim 1 formed from: 3. A metal can having an open / close canopy according to claim 1, wherein said metal eye (3) is formed from a drawn can body (2). 4. An upper edge portion (5) formed by bending between the can body (2) and the eye (3) is connected to the can body (2) side and the eye (3) side. A metal can having the open / close canopy according to claim 1 adhered thereto.