JPH10157753A - Cover body structure of container and fitting device of cover body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely, easily, and hermetically fit a metallic cover body onto the cylindrical mouth of a container and also easily separate the cover body from the container by breaking the body. SOLUTION: A metallic cover body 4 is fitted to the cylindrical mouth 2 of a container and a fitting wall 6 attached from the outside to the cylindrical mouth 2 provided with a peripheral line 3 at the outer periphery of the upper end, is connected to the periphery of the top plate 5. And a fixing projection line 8 wound at the lower end of the fitting wall 6 so as to curl inward is provided at the periphery to constitute the cover body 4. This cover body 4 is fitted to the cylindrical mouth 2 and the fitting wall 6 is caulked and further, the fitting projection line 8 is fixed to the peripheral line 3 from the downward direction to fit hermetically the cover body to the cylindrical mouth 2. The cylindrical mouth is pressed in the linear cylinder 20 from the opening end of a tapered wall part 21 in the condition that a raw material 4a of the cover body is temporarily assembled at the cylindrical mouth 2 and then the fitting wall 6 is caulked, by a cylindrical tool in which the continuously widened taper wall 21 is formed on the linear cylinder 20 having almost the same inner diameter-with the diameter of the top plate 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid structure of a container for tightly assembling a metal lid with a mouthpiece of a bottle formed of synthetic resin or glass, and to an apparatus for mounting the lid. .

[0002]

2. Description of the Related Art Containers for storing foods, medicines, chemicals, and the like are required to be completely sealed at first. That is,
In order to prevent the quality of food products manufactured from deteriorating until the consumer opens the container, or to be able to carry it efficiently, the container itself must be airtight. It is important to maintain the water tightness and liquid tightness.

[0003] Next, in the process of storing food and the like,
It is required that assembly can be reliably, quickly and easily achieved while ensuring this sealing property. That is, in a state where the contents are stored in the container body, the opening of the container body must be efficiently and tightly closed by the lid.

[0004] Then, when the user opens the container for use or the like, the concept is the reverse of the concept of ensuring the sealing performance, but the lid is to be easily, reliably and safely removed from the container body. is required.

[0005] Furthermore, after the consumer opens the container, not all of the stored contents are used and consumed at a time. Therefore, after opening the container and taking out a part of the contents, the contents are protected. It may be necessary to reseal.

[0006] From the viewpoint of satisfying all such requirements, metal cans have been widely used as containers in the past. This metal can is securely sealed, withstands some impact, and can prevent deterioration of the stored items. In addition, for example, a score line is engraved on a part of the top plate to form a sealing piece. If a so-called pull tab structure is used in which the sealing piece is peeled off at the score line portion to form an opening, the seal can be easily opened.

Conventionally, so-called three-piece cans have been widely used as metal cans. This means that one end of the metal cylinder is closed with a metal bottom plate and then sealed or sealed with a roll jig, and the contents are stored from the opening end, which is the other end of the cylinder, A very high sealing effect can be achieved by closing the opening end with a metal lid plate and sealing by caulking or winding and sealing with a roll jig.

[0008] However, the work of caulking or winding and sealing with a roll jig is extremely specialized, and requires a predetermined mechanical device and skilled skills.
And, as is well known, the caulking sealing or the roll sealing jig is performed by integrating the upper end portion of the cylindrical body and the peripheral end portion of the cover plate and winding them together. In order to prevent cracks, and to ensure the assembling, a certain strength is required for the cylinder and the cover plate,
Therefore, in order to secure this strength, a thick material must be used, and there is a dissatisfaction point that the production cost increases.

However, after the sealing piece formed by the score line occupying a part or most of the lid plate serving as the top plate is peeled off at the score line portion and opened, the can is wound around the upper end peripheral end of the can. Since the peripheral end of the lid plate is formed in a peripheral strip shape by fastening or the like, a sealing cap made of a synthetic resin having a short-topped cylindrical shape, which is a separate body, is tightly assembled using the peripheral strip. This allows for resealing after use.

As described above, a so-called pull-tab structure container that can be securely sealed, can be easily opened, and can be re-sealed, has a sealing piece formed by a score line, and has a cylindrical shape. Since a metal lid plate capable of caulking the opening end or winding and sealing it with a roll jig had to be used, it had to be a metal can.

However, as described above, the metal can
While there are many advantages, there is a problem in that the material cost is high, and the work for caulking or sealing with a roll jig requires labor, skill, and equipment costs.

The most important consideration when using a metal can is the problem of corrosion resistance. In particular, when storing an acidic substance, there is a possibility of corrosion due to acid. Therefore, conventionally, an anticorrosion film or the like is generally applied to the inner surface of the can in advance.

However, the anticorrosion film has uneven coating,
If it gets scratched, it will be affected by the stored items.
As a result, quality is impaired. For example, in the case of a glass bottle, even if a metal is used for the lid, only the inner surface of the lid needs to be subjected to anticorrosion treatment, so that the above-mentioned disadvantages can be minimized.

For this reason, bottles formed of cardboard, synthetic resin, or glass are often used as relatively inexpensive containers. Particularly, in the case of wide-mouth bottles, the bottle is used as a sealing means for the bottle. In this method, a sheet made of aluminum foil or the like is brought into close contact with the upper surface of the mouthpiece, a sealing cap screwed to the mouthpiece is used, or a breakable metal cap is placed.

[0015] Since the screwing cap inherently lacks sealing properties, a sealing strip is provided on the lower surface of the top plate of the cap so as to face the upper surface of the mouthpiece, or a sealing sheet is disposed in the cap, and the cap is opened. It is possible to reseal after opening as well as before, but the cost of molding the screw cap itself with metal or synthetic resin is expensive, and although resealing is necessary, the stored contents are exhausted by resealing several times, When used as a disposable container, it becomes uneconomical.In addition, when used repeatedly, the cap is tightly tightened too much to ensure sealing, making it difficult to reseal. There are also disadvantages.

Further, in a structure in which a sheet made of aluminum foil or the like is adhered to the upper surface of the mouthpiece, the strength remains uneasy. However, there remains a problem that it cannot withstand the suction pressure caused by the pressure.

[0017] In addition to the weak adhesion between the mouthpiece and the aluminum foil sheet, the aluminum foil sheet is not easily peeled off. A means for extending the tongue must be added to a part of the peripheral end.

Further, in such a configuration in which the sheets are brought into close contact with each other, since the entire area of the cylinder is opened by peeling, the quality is likely to be deteriorated due to the incorporation of moisture or germs during reuse, and the liquid other than the liquid is used. When an appropriate amount of the content is taken out, a spoon or the like is used, and accordingly, the chance of mixing water and the like increases.

Therefore, as another means for solving the above-mentioned problem of the sealing cap made of the aluminum foil sheet, there is a constitution in which a breakable metal cap is covered. This short-capped metal cap made of aluminum is tightly fitted to the mouthpiece of the bottle, and a tongue-like tension piece extends from a part of the lower end of the short cylinder. Then, upon opening, the tension piece is caused to break the assembly with the mouthpiece.

In the mode of disassembly with the mouthpiece, the short piece is partially broken by forcibly pulling the tension piece, and by pulling it further upward, the top plate is almost at the radius of the mouthpiece diameter. Bends. As a result of the top plate being bent in this way, the assembly with the mouthpiece is weakened, and the entire cap including the short cylinder and the top plate can be detached from the mouthpiece.

However, since the top plate is peeled off from the mouthpiece together with the short cylinder, not only a strong force is required as described above, but also it is slippery and always involves danger.

Further, since the entire cap including the short cylinder must be detached from the barrel, there is a great concern about the strength of the assembly between the short cylinder and the barrel. In other words, this type of metal cap is constructed by pressing a single circular metal plate and hanging a short cylinder on the periphery of the top plate. It is just that.

The short cylinder and the peripheral rim of the upper end of the barrel are assembled by temporarily rotating the cap with the cap temporarily attached thereto, and gradually tightening the short cylinder from the periphery with a plurality of split dies. It is a form to go.

Therefore, wrinkles are likely to be formed in the short cylindrical portion at the time of tightening, and a minute gap is easily formed, and if the internal pressure changes due to a change in the temperature of the contents, there is a possibility that confidentiality may be impaired.
In addition, since it is single, it is easy to peel off, but the result is inferior in assembling strength.

As described above, the conventional sealing means for a mouthpiece has been to adhere a sheet made of aluminum foil or the like, screw a sealing cap, or cover a breakable metal cap. Each had its pros and cons, and was a place where complaints remained.

[0026]

SUMMARY OF THE INVENTION From such a viewpoint,
The applicant of the present invention has previously proposed an invention in which an assembly portion of a metal lid is thermocompression-bonded to a bottle mouth via an adhesive (Japanese Patent Application Laid-Open No. 8-2543). I'm playing.

Recently, the reuse of used products has been strongly demanded and encouraged. For this reuse, for example, in the case of a glass bottle equipped with a metal cap, the cap and the bottle are separated, and each is crushed and dissolved.

For example, in the case of the above-mentioned sheet made of aluminum foil or the like, a cap with a screwed assembly or a breakable metal cap, the strength of assembling with the mouthpiece is insecure in the first place. The work of separating the body from the body is rather easy, but in the case of the cap using the above-described adhesive, even if the bottle is crushed, the peripheral portion of the lid remains attached, which causes inconvenience. Was.

Therefore, according to the present invention, the metal lid can be securely and easily and tightly assembled to the mouthpiece of the container, and the lid can be easily separated by crushing the container. The purpose is to do so.

[0030]

In order to solve the above problems, a lid structure of a container according to the present invention is a metal lid attached to a mouthpiece of a container, wherein a peripheral line is provided on an outer periphery of an upper end. A lid is constructed by connecting an assembly wall for external assembly to the mouthpiece of the container from the periphery of the top plate, and by arranging a locking strip in which the lower end of the assembly wall is curled inward. Then, the lid is fitted into the mouthpiece, the assembly wall is swaged, and the locking streak of the assembly wall is engaged with the peripheral rim of the mouthpiece from below, whereby the lid is closely assembled to the mouthpiece. It is a configuration to attach.

In this case, a packing material is arranged on the inner surface of the peripheral edge of the top plate facing the mouthpiece, or a depression having a diameter substantially equal to the inner diameter of the mouthpiece is formed at the center of the top plate. A score line for cutting is provided, a pulling piece is integrally attached to a sealing piece portion formed by the score line, and a number of pouring holes are opened in the top plate, and peeling is performed on the upper surface of the top plate. It is preferable to attach a sheet-foil-shaped sealing material as much as possible.

Further, the lid mounting apparatus of the present invention is an apparatus for caulking and assembling the above-described lid to a mouthpiece, and continuously expands into a straight cylindrical portion having an inner diameter substantially equal to the diameter of the top plate. Construct a cylindrical jig that forms a tapered wall part with a diameter, press-fit in the direction of the straight cylindrical part from the tapered wall opening end with the lid material temporarily attached to the mouthpiece, and the diameter of the lower end of the mounting wall The diameter is reduced to approximately equal to the diameter of the top plate and caulked, and the locking strip at the lower end of the assembling wall is locked to the circumferential strip of the mouthpiece from below.

[0033] As a result of the above-described configuration, a locking streak wound inward is formed circumferentially at the lower end of the mounting wall, while a circumferential streak is provided at the outer periphery of the upper end of the mouthpiece. Therefore, when the metal lid is fitted into the mouthpiece and the mounting wall is caulked, the locking streak of the mounting wall is locked from below on the peripheral rim of the mouthpiece. It is tightly assembled to the cylinder.

The locking strip of the mounting wall is formed so as to be curled inward at the lower end, so that it has extremely high strength.
Engagement from below is reliably achieved with respect to the rim of the mouthpiece, and a high degree of sealing with respect to the container is ensured without wrinkling, cracking or formation of minute gaps. .

In this case, if a packing material is arranged on the inner surface of the peripheral end portion of the top plate facing the mouthpiece, the sealing property is further secured,
If a depression having a diameter substantially equal to the inner diameter of the cylinder is formed at the center of the top plate, the depression fits into the cylinder to secure sealing performance.

Further, since the lid is made of metal, it is possible to provide a score line for cutting on the top plate, and a tension piece is integrally provided with the sealing piece portion formed by the score line. By pulling up the tension piece upward and separating the score line, an opening is formed in the sealing piece portion of the top plate, and the remaining assembly is left in the barrel portion from the peripheral end of the top plate to the mounting wall portion. Since it is still attached, the cut portion is safe without being exposed.

According to the lid mounting apparatus of the present invention,
When the lid material is temporarily attached to the mouthpiece and press-fitted from the open end of the tapered wall, the diameter of the lower end of the assembled wall is gradually reduced by the tapered wall until it becomes almost equal to the diameter of the top plate. At the time of press-fitting into the part, the locking streak at the lower end of the assembling wall is crimped in a form in which the curled winding shape is slightly squashed and is locked from below onto the circumferential streak of the mouthpiece. Assembling of the attachment wall and the mouthpiece is reliably achieved.

In particular, in the mouthpiece of the container, although very slight, there is some error in each product, and there is also an error in the thickness of the packing material. Therefore, when the lid is assembled to the mouthpiece, not all products are necessarily in the same condition, and assembling strength varies in a single caulking process as in conventional products.

In this case, since the locking strip has a curled winding shape, the locking strip is crushed during the caulking operation to sufficiently absorb the above-mentioned error, and the assembling strength of the mounting wall and the mouthpiece is reduced. Sealability is surely achieved.

In this assembling process, the diameter reduction of the assembling wall is performed gradually at the same time as the entire periphery of the assembling wall is gradually performed by the tapered wall portion. It does not occur.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A container 1 has a bottle structure formed at a low cost with a synthetic resin or glass. Is provided around.

A relatively thin metal lid 4 is provided on the peripheral edge of a disk-shaped top plate 5 having an outer diameter substantially equal to the inner diameter of the barrel 2, on the peripheral edge of the upper end of the barrel 2. 3 is provided with an assembling wall 6 for hanging the outer assembly, and a depression 7 having a diameter substantially equal to the inner diameter of the mouthpiece 2 is formed in the center of the top plate 5.

At the lower end of the assembling wall 6, a locking strip 8 that is turned inward and wound in a curled shape is provided around the circumference, and the locking strip 8 is attached to the circumferential strip 3 of the barrel 2 by caulking. By locking from below, the lid 4 is tightly assembled to the barrel 2 (see FIG. 2).

Therefore, when the cover 4 is assembled to the barrel 2, the recessed portion 7 of the cover 4 is in a posture of closely fitting into the upper end of the barrel 2.

Next, in the illustrated embodiment, a score line 9 for cutting is provided in a ring shape at the peripheral end of the depression 7, and the entire area of the depression 7 is formed as a sealing piece 10, which is surrounded by the score line 9. A tension piece 11 is integrally attached to the formed sealing piece 10.

The tension piece 11 is fitted with a part of a rivet piece 12 which is formed by projecting in advance on a part of the top plate 5, and the rivet piece 12 is crushed to be integrated with the top plate 5. The score line 9 is cut by lifting the ring portion 13 of the tension piece 11 with a finger, and the sealing piece 10 is removed and opened.

The tension piece 11 is so formed as to be easy to open.
The distal end is located opposite to the peripheral edge of the top 5, and the ring portion 13 is located substantially at the center of the top 5.

Even in the above-described embodiment, it is not always the case that all the contents are taken out after opening, and there is a case where it is necessary to take out an appropriate amount and then reseal. In such a case, a sealing cap 14 is used as a resealing means.

The sealing cap 14 has a structure in which a top plate 16 is integrally provided at the upper end of a short cylinder 15 having an inner diameter equal to the outer diameter of the mounting wall 6, and is made of a relatively soft synthetic resin.

Even when the sealing cap 14 is not opened, the short cylinder 15 is fitted into the container with the portion of the short cylinder 15 exactly fitted on the outer periphery of the mounting wall 6 of the lid 4. Since the five peripheral end portions and the assembly wall 6 portion remain as they are, the container 1 can be kept sealed when the sealing cap 14 is fitted again.

Incidentally, the pull cap structure as the opening means is merely an example, and is not limited to this. For example, in the case where powdery material such as pepper is stored in the container 1, FIG. As shown in the figure, a large number of pouring holes 17 are previously opened in the recessed portion 7 of the top plate 5, and a sealing sealing material in the form of a sheet foil is adhered to the upper surface of the recessed portion 7 before starting use (illustration is made). (Omitted), and may be removed at the time of use. In this case, after opening the container, the container 1 is covered with the sealing cap 14 to ensure the hermeticity of the container 1.

On the inner surface of the peripheral end portion of the top plate 5, which is opposed to the upper end surface of the barrel 2 when assembled to the barrel 2, a packing material 18 is formed by applying a predetermined resin, for example. It is arranged.

The means for assembling the lid 4 to the mouthpiece 2 of the container 1 in the lid 4 having the above-described structure may be variously conceivable. 19 is shown in FIGS.

That is, first in FIG. 5, the lid material 4a
In a state temporarily assembled to the mouthpiece 2 of the container 1, the top plate 5, the assembling wall 6a, the depressed portion 7, and the locking strip 8 which is turned inward and wound in a curl shape are press-formed. However, the lower end of the assembling wall portion 6a has a slightly skirt-like enlarged diameter, so that the assembling wall portion 6a can be easily temporarily assembled to the mouthpiece 2.

On the other hand, the caulking device 19 shown in FIG. 3 is a cylindrical jig that forms a tapered wall portion 21 that continuously increases in diameter to a straight cylindrical portion 20 having an inner diameter substantially equal to the diameter of the top plate 5. In addition, a frame 23 urged via a bullet 22 toward a tapered wall 21 is slidably disposed in the straight cylindrical portion 20.

Then, in the state where the lid material 4a is temporarily assembled to the mouthpiece 2, the frame body 23 is opened from the open end of the tapered wall portion 21.
(See FIG. 3), the lower end of the mounting wall 6a is guided by the tapered surface of the tapered wall 21. In the state where the entire circumference is gradually reduced at the same time and enters the straight cylindrical portion 20, the diameter of the lower end portion of the mounting wall portion 6a is
(See FIG. 4), and is formed as an assembling wall 6 and a curl-shaped locking strip 8 at the lower end thereof is slightly crushed. While facing the circumferential rim 3 of the mouthpiece 2, it is locked from below.

As described above, the assembling wall 6a whose lower end has a slightly skirt-shaped enlarged diameter is gradually reduced in diameter by being guided by the tapered surface of the tapered wall 21. At the same time, they will be crimped and therefore not wrinkled or cracked.

Further, even if the container 1 such as a bottle has a wide-mouth structure, it is normal that the diameter of the container 1 is slightly increased as a shoulder portion is formed below the mouthpiece 2. Therefore, when the caulking operation is performed by the caulking device 19, the assembling wall portion 6a
When the lower end of the body is about to enter the straight cylindrical portion 20,
It is inconvenient if the shoulder of the enlarged diameter comes into contact with the insertion opening end of the temporary assembly of the lid material 4a and the mouthpiece 2 in the caulking device 19.

In this regard, if the insertion opening end of the caulking device 19 is formed in the tapered wall portion 21 having an enlarged diameter as in the present invention, the inconvenience that the shoulder portion abuts does not occur. That is, the tapered surface of the tapered wall portion 21 not only functions as a guide for the assembling wall portion 6a at the time of machining insertion, but also provides an escape portion for avoiding contact of the shoulder portion.

[0060]

As described above, in the lid structure of the container according to the present invention, the locking strip at the lower end of the assembling wall is securely locked from below in opposition to the circumferential strip of the mouthpiece. The lid can be tightly assembled to the mouthpiece of a bottle-shaped container, and the locking strip is formed around the lower end of the mounting wall by inverting and winding it around, so that it is extremely strong. It is high and the mutual assembling strength is high.

Further, since resealing is possible, it is possible to minimize the quality deterioration of the stored contents as well as before opening and after opening.

As the container, a product formed of a synthetic resin or glass is used. Since the lid is not attached to the container by caulking and sealing by metal or by rolling and sealing with a roll jig, a large-scale container is used. No equipment is required, and the cost of the container itself is not only low, but also the metal lid itself can be made thin, so it can be manufactured at low cost, and at a much lower cost than using a conventional metal can. Can be manufactured.

Even in the case where the container must be crushed and dissolved, for example, in a recycling process, the peripheral end of the top plate of the remaining lid and the mounting wall can be easily separated, so that handling is extremely difficult. It will be easy.

Since the lid is made of metal, it can maintain a strength enough to withstand a negative pressure and an external force generated inside, and a so-called pull-tab structure is used to ensure sealing. However, since the opening can be easily opened and the mounting wall can be left at the peripheral end of the container mouth tube, a resealing sealing cap as a separate member can be closely fitted.

Further, according to the lid mounting apparatus of the present invention, it is possible to reliably perform the caulking assembling in a form in which the locking streak at the lower end of the mounting wall is locked from below on the peripheral rim of the mouthpiece. Since the diameter reduction deformation of the attachment wall is performed gradually all around at the same time, there is no wrinkling or cracking in a part.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a lid structure of a container of the present invention.

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

FIG. 3 is a cross-sectional view of the apparatus for mounting a lid of a container according to the present invention, immediately before the operation of caulking the lid.

FIG. 4 is a cross-sectional view of the device for mounting a lid of a container according to the present invention, at the end of a caulking operation of the lid.

FIG. 5 is a cross-sectional view of a state in which a lid material is temporarily assembled to a mouthpiece.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1; Container, 2; Muzzle, 3; Circumference, 4; Lid, 4a; Lid material, 5; Top plate, 6: Assembly wall, 6a;
7; depression, 8; locking strip, 9; score line, 10; sealing strip, 11; tension strip, 12; rivet strip, 13; ring, 14; sealing cap, 15; short cylinder, 16; , 1
7; pouring hole, 18; packing material, 19; caulking device, 2
0: straight cylindrical portion, 21: tapered wall portion, 22: bullet, 2
3: Coma body.

Claims (6)

[Claims] 1. A metal lid (4) to be mounted on a barrel (2) of a container (1), wherein an outer assembly is provided on the barrel (2) provided with a circumferential strip (3) on the outer periphery of an upper end. An assembling wall (6) is continuously provided from the periphery of the top plate (5), and a lower end portion of the assembling wall (6) is curled inward to form a locking strip (8). To form the lid (4), and the lid (4)
Is fitted into the mouthpiece (2) to caulk the assembling wall (6), and the locking ridge (8) is locked to the peripheral ridge (3) from below, whereby the lid (4) is A lid structure of a container that is tightly assembled to the barrel (2). 2. The container lid structure according to claim 1, wherein a packing material (18) is arranged on the inner surface of the peripheral end of the top plate (5) facing the mouthpiece (2). 3. The container lid structure according to claim 1, wherein a depression (7) having a diameter substantially equal to the inner diameter of the mouthpiece (3) is formed in the center of the top plate (5). 4. A score line (9) for cutting is provided on a top plate (5), and a tensile piece (11) is integrally attached to a sealing piece (10) surrounded by the score line (9). Claim 1
Or the lid structure of the container according to 2 or 3. 5. A top plate (5) having a number of pouring holes (17), and a sheet-foil-shaped sealing material stuck on an upper surface of the top plate (5) in a peelable manner. Or the lid structure of the container according to 2 or 3 or 4. 6. A device (19) for caulking a lid (4) according to claim 1 or 2 or 3 or 4 or 5 to a mouthpiece (2), wherein a diameter of a top plate (5) is provided. Forming a cylindrical jig forming a tapered wall portion (21) continuously expanding on a straight cylindrical portion (20) having an inner diameter substantially equal to
With the lid material (4a) temporarily attached to the mouthpiece (2), press-fit the tapered wall portion (21) from the opening end in the direction of the straight cylinder portion (20) to adjust the diameter of the lower end of the assembly wall (6). The diameter is reduced to approximately equal to the diameter of the plate (5), and caulked, and the mounting wall (6)
A mounting device for a lid, wherein a locking ridge (8) at a lower end is locked to a peripheral ridge (3) of a mouthpiece (2) from below.