JP2003011968A - Bottle cans - Google Patents

Abstract

(57) [Problem] To provide a bottle-type can in which the neck portion is easily held like a conventional PET bottle and the sealing property of the cap is improved. A bottle-shaped can (1) according to the present invention includes a can body (2) filled with contents, a neck member (3) formed separately from the can body (2) and fixed to an upper edge of the can body (2), and a neck. A cap 4 screwed over the upper part of the member 3. The neck member 3 and the shoulder 7 of the can body 2 are joined by a flange 8 and a fixing portion 12. Since the user can have the flange portion 8 and the fixing portion 12, it is easy to hold the bottle-shaped can 1, and can hold the cap 4 so as not to touch the ring portion 18 on the lower edge of the cap 4. The female screw portion 17 of the cap 4 presses the cap 4 from above to form the male screw portion 9 of the neck member 3 as a mold. However, since the fixing member 12 can support the neck member 3 from below, the female screw portion 17 has a strong force. The female thread 17 can be formed while pressing the cap 4, and the sealing between the mouth 10 of the neck member 3 and the cap 4 is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottle type can used for a beverage can or the like.

[0002]

2. Description of the Related Art Conventionally, so-called PET (polyethylene terephthalate) bottles have been widely used as containers for filling soft drinks, and the PET bottles can be closed again after being opened once. The points are excellent. On the other hand, it is difficult to recycle PET bottles, and there is a problem that the amount recovered as a resource material exceeds the amount to be recycled at present. Therefore, in recent years, in consideration of recyclability, Japanese Patent Laid-Open No. 2001-2001
As disclosed in Japanese Patent No. 114245, a bottle-shaped can whose container is made of a metallic material such as aluminum or steel and whose external shape is similar to that of a conventional packaging bottle is also used.

By the way, in the bottle-type can disclosed in the above publication, the shoulder portion located above the can body has its diameter reduced upward, and a neck portion having a mouth portion is provided above the shoulder portion. ing. In addition, a screw cap that is usually screwed into the mouth is attached to the mouth. This screw cap is equipped with a tamper evidence (illegal opening display function) that makes it clear that the cap has been opened to prevent unauthorized opening. Specifically, a so-called PP (pill fur proof, hereinafter the same) band in which the band portion provided at the lower end edge of the cap is detached at the time of opening, and a skirt portion provided at the lower end edge of the cap are axially opened at the time of opening. A so-called PP capper is provided which is divided and opened. In a container equipped with such a cap, the PP band or P
The P capper projects in the circumferential direction of the cap.

In such a state, when the user carries the container by holding the shoulder portion of the can body, the shoulder portion is reduced in diameter upward, so that the user's hand slips on the neck portion. May reach. Also, in conventional PET bottles, it is often carried around by holding the neck,
A similar situation can occur with bottle-type cans.

Therefore, in the conventional bottle type can,
After opening the cap once and closing the cap again, the user's hand comes into contact with the portion where the PP band or the PP capper projects in the circumferential direction of the cap as described above.

In the conventional bottle type can, a screw portion for screwing the cap to the mouth portion is provided in advance, and after filling the contents in the container, the cap not having the screw portion is formed. The screw is provided on the mouth while pressing the neck, and the screw provided on the mouth is used as a mold to form the screw on the cap with the forming roll. At that time, it is necessary to sufficiently secure the sealing property of the cap by pressing the cap against the mouth portion.

However, since the bottle-shaped can has shoulders and mouths formed by deeply squeezing a metal can body blank, the strength is weak with respect to the axial force and a strong axial force is applied. May buckle. Therefore, although a recess is provided in the circumferential direction of the neck and the cap is pressed against the mouth while the recess is held by a holding member such as a turret, it is difficult for the recess to support a strong force. Therefore,
Since it was difficult to press the cap strongly against the mouth of the conventional bottle-shaped can, the close contact between the cap and the mouth was poor,
The contents may leak out.

[0008]

DISCLOSURE OF THE INVENTION The present invention is intended to improve a bottle-shaped can, and more specifically, in order to eliminate the above-mentioned inconvenience, even when a neck portion is provided like a conventional PET bottle, An object of the present invention is to provide a bottle-type can that does not hurt the user's hand, improves the sealing property of the cap, and prevents the contents from leaking.

[0009]

In order to achieve the above object, the bottle-shaped can of the present invention is a bottle-shaped can formed of a metal member, and has a shoulder portion whose diameter decreases upward. A bottomed tubular can body, a tubular neck member formed separately from the can body and having an opening at the top, and a cap covering the opening, and a shoulder portion of the can body. Of the neck member or a lower end edge of the neck member is provided with a flange portion projecting in the outer circumferential direction over the entire circumference, and the other is provided with a fixing portion that is joined over the entire circumference of the flange portion. The outer peripheral edge of the cap protrudes more outward than the outer peripheral edge of the cap.

According to the bottle-shaped can of the present invention, since the collar portion projects in the outer peripheral direction from the outer peripheral edge of the cap, the user can easily hold the bottle-shaped can by the collar portion. . Further, since the flange portion projects in the outer peripheral direction of the bottle-shaped can together with the fixing portion, the force pressing the cap from above when the screw portion is formed on the cap is supported from below by the flange portion. be able to. Therefore, since the load from above can be supported by the neck member instead of the can body, the cap can be pressed with a strong force as compared with the case of being supported by the deep-drawn can body. Accordingly, it is possible to form a bottle-shaped can having a high sealing property between the cap and the mouth.

Further, in the bottle type can of the present invention, when the cap is opened at the lower end edge of the cap, an opening indication indicating that the cap has been opened by projecting outward from the outer peripheral edge of the cap. When the cap is provided, the flange portion and the fixing portion are provided close to the opening display portion, and the outer peripheral edge of the flange portion is the outer peripheral edge of the opening display portion after the cap is opened. It is more preferable that they project in the outer peripheral direction.

As described above, in a container such as a beverage can, a PP band or a PP capper is used as the unsealing display portion so that the fact of unsealing can be made clear on the cap.
Although these unsealing display portions project outward from the outer peripheral edge of the cap after the cap is unsealed,
In the bottle-shaped can of the present invention, the collar portion and the fixing portion are provided in proximity to the opening display portion, the collar portion is an outer peripheral edge of the opening display portion after the cap is opened. Is projected in the outer peripheral direction. Therefore, when the user holds the shoulder or neck of the bottle-shaped can of the present invention, the user's hand does not come into contact with the unsealing display part by the fixing part. Further, since the collar portion is provided close to the unsealing display portion, the user's hand does not enter between the collar portion and the unsealing display portion.

Further, in the bottle-shaped can of the present invention, the lower end edge of the neck member is made larger in diameter than the mouth portion, and the upper end edge of the shoulder portion is aligned with the lower end edge of the enlarged diameter neck member. It is preferable that the amount of diameter reduction is reduced. As described above, by reducing the diameter reduction amount of the shoulder portion, the number of times of drawing the shoulder portion of the can body can be reduced. Also,
Since the diameter expansion of the lower end edge of the neck member can be performed when the neck member is drawn, it does not substantially affect the production speed. Therefore, by partially moving the diameter reduction amount of the shoulder portion to the neck member, it is possible to improve the production speed of the bottle-shaped can as a whole.

Further, in the bottle type can of the present invention, the can body is formed separately on the shoulder portion and a body portion located below the shoulder portion, and the lower end edge of the shoulder portion or the body portion is formed. A second flange portion projecting in the outer circumferential direction over the entire circumference is provided on one of the upper end edges of the, and a second fixing portion joined over the entire circumference of the second flange portion is provided on the other end. It is preferable.

When the can body is provided with the second collar portion and the second fixing portion, the second collar portion is applied even when a force is applied from the circumferential direction to the can body. Also, the circumferential force can be supported by the second fixing portion. Therefore, even when a force is applied from the circumferential direction of the can body during the transportation of the bottle type can, the can body is unlikely to be deformed, so that the inconvenience such as the reduction of the commercial value due to the deformation of the can body is unlikely to occur.

Further, in the bottle type can of the present invention, synthetic resin films are attached to both front and back surfaces of the can body and the neck member, and the collar portion and the fixing portion or the second collar portion and the It is preferable that the second fixing portion is caulked and welded by the synthetic resin film. Usually, in metal cans, synthetic resin films are attached to the front and back sides for reasons such as protection of contents and exterior design. Therefore, since the synthetic resin film is also present on the joint surface between the flange portion and the fixing portion, by heating and melting the synthetic resin film, the flange portion and the fixing portion easily It is possible to improve the airtightness. This makes it possible to improve the sealing performance of both members without performing processing such as winding tightening on the collar portion and the fixing portion.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an example of an embodiment of a bottle type can of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory view showing the bottle type can of the present embodiment, FIG.
2A is an explanatory view showing a joint portion between a neck member and a can body in a state where a cap is tightened, and FIG. 2B is a partially enlarged cross-sectional view of FIG. 2A showing a collar portion and a fixing portion. FIGS. 3 (a) and 3 (b) are explanatory views showing the process of joining the neck member and the can body, FIG.
(A)-(c) is explanatory drawing which shows the mounting process of a cap,
FIG. 5 is an explanatory view showing a state where the user holds the bottle-shaped can of this embodiment, and FIGS. 6 and 7 are partial cross-sectional views showing the bottle-shaped can of another embodiment.

The bottle-shaped can 1 of the present embodiment is a beverage can as shown in FIG. 1, and a can body 2 filled with contents and an upper end edge of the can body 2 formed separately from the can body 2. A neck member 3 fixed to the can body 2, a cap 4 that is screwed to cover the upper portion of the neck member 3, and a bottom lid 5 that is fixed by being wound around the lower end edge of the can body 2. .

As shown in FIG. 1, the can body 2 has a body portion 6 which occupies a lower position, a shoulder portion 7 which is reduced in diameter upward from the body portion 6, and an entire circumference of an upper end edge of the shoulder portion 7. And a flange portion 8 projecting in the outer peripheral direction. In the present embodiment, the can body 2 is formed by drawing and ironing a can body blank which is a metal plate such as an aluminum alloy whose both surfaces are covered with a synthetic resin film such as polyethylene terephthalate. The bottom lid 5 wound around the lower end of the can body 2 has the same structure as the bottom lid used for a normal three-piece beverage can.

As shown in FIG. 2A, the neck member 3 includes a male screw portion 9 to which the cap 4 is screwed, a mouth portion 10 provided at an upper edge of the male screw portion 9, and a lower portion of the male screw portion 9. And a collar portion 8 provided below the reduced diameter portion 11
And a fixing portion 12 for sandwiching the same from the vertical direction over the entire circumference. As shown in FIG. 2B, the fixing portion 12 includes an upper surface portion 12a that covers the upper surface side of the collar portion 8 and a lower surface portion 12b that covers the lower surface side of the collar portion 8. Further, in the present embodiment, the neck member 3 is formed by drawing and ironing a metal blank whose both surfaces are covered with a synthetic resin film as in the case body 2.

In the present embodiment, the can body 2 and the neck member 3
And are joined as follows. Fixed part 1 of neck member 3
In the state before being joined to the can body 2, 2 is a state in which the lower surface portion 12b of the fixing portion 12 projects downward from the outer peripheral edge of the upper surface portion 12a as shown in FIG. 3 (a). In this state, the fixing portion 12 of the neck member 3 is attached to the collar portion 8 of the can body 2. Next, as shown in FIG. 3B, the lower surface portion 12 b of the fixed portion 12 is bent in the inner circumferential direction, and the upper surface portion 12 of the fixed portion 12 is bent.
The collar portion 8 is held between a and the lower surface portion 12b. Further, high-frequency heating is performed by a high-frequency coil 13 from the outside of the fixed portion 12 to heat and melt the synthetic resin film 14 in the portion where the fixed portion 12 and the brim portion 8 are joined to each other. Are welded by a synthetic resin film 14. As described above, in the present embodiment, the can body 2 and the neck member 3 sandwich the collar portion 8 by the fixing portion 12 and are welded by the synthetic resin film 14, so that the collar portion 8 and the fixing portion Highly sealed with 12.

The cap 4 has a structure similar to that used in a conventional bottle type can, and as shown in FIG. 2A, a substantially circular top plate portion 15 for covering the mouth portion 10 and a top portion. Board 1
5, a cylindrical portion 16 extending downward from the peripheral edge of
A female screw portion 17 provided on the male screw portion 6 and screwed to the male screw portion 9;
The cylindrical portion 16 is provided with a ring portion 18 provided on a lower end edge thereof. The ring portion 18 is a so-called PP band (opening display portion) which is cut off from the cylindrical portion 16 while leaving a part when the cap 4 is opened. In the present embodiment, since the ring portion 18, the collar portion 8 and the fixing portion 12 are provided close to each other, it is difficult for the user's hand to enter between these members. In addition, a seal member 19 is provided on the inner surface of the top plate portion 15, which comes into close contact with the mouth portion 10 when the cap 4 is tightened.

The cap 4 has a mouth portion 10 of the neck member 3.
The female screw portion 17 is not provided in a state before being mounted on the molding rolls 20a, 20b by using the male screw portion 9 provided on the neck member 3 as a mold by covering the mouth portion 10 with the cap 4.
The internal thread portion 17 is formed by this to adjust the shape of the ring portion 18. Specifically, as shown in FIGS. 4A and 4B, the neck member 3 and the bottom lid 5 are attached to the can body 2, and the inside of the can body 2 is filled with the contents. 3 is covered with the cap 4 on which the female screw portion 17 is not formed. Next, as shown in FIG. 4C, the lower portion of the fixed portion 12 is held by the holding member 21 and the cap pressing member 22 is held.
While the cap 4 is pressed against the mouth 10 by the forming roll 20a for forming the screw portion, the female screw portion 17 is formed, and the forming roll 20b for reducing the diameter of the lower end edge of the ring portion 18 lowers the lower end of the ring portion 18. The edge is reduced in diameter to shape it. In the bottle-shaped can 1 of the present embodiment, the neck member 3 located above the fixing portion 12 is held by the holding member 21, so that the can body is not affected even when a large load is applied by the pressing member 22. There is no possibility that 2 will buckle.
Therefore, since the cap 4 can be strongly pressed against the mouth portion 10, the sealing property of the cap 4 can be improved.

Further, in the bottle type can 1 of the present embodiment, the collar portion 8 and the fixing portion 12 project in the outer peripheral direction between the upper position of the shoulder portion 7 of the can body 2 and the lower position of the cap 4. ,
When the user holds the bottle-shaped can 1, as shown in FIG. 5, the collar 8 and the fixing portion 12 can be pinched and held. As described above, the bottle-shaped can 1 of the present embodiment is easier to carry than the conventional bottle-shaped can.

Further, after the cap 4 is once opened, the ring portion 18 is separated from the cylindrical portion 16 of the cap 4, leaving a part thereof. When the cap 4 is attached to the mouth portion 10 again in this state, as shown in FIG.
Although the ring portion 18 protrudes in the outer peripheral direction more than the cylindrical portion 16 and the female screw portion 17 of the bottle, the user can have the collar portion 8 and the fixing portion 12, so that the bottle portion should not touch the ring portion 18. You can have a mold can 1. Moreover, when the user holds the shoulder portion 7, the user's hand becomes slippery when dew condensation occurs on the surface of the bottle-shaped can 1, but even in this case, the user's hand has the collar portion. 8 does not slide upward from the fixed portion 12 and the lower edge of the cap 4 is not touched by the hand.

Further, the bottle-shaped can 1 of this embodiment is provided with the brim portion 8 and the fixing portion 12 as described above, and therefore, the shape thereof is similar to that of the PET bottle which is widely used at present. Therefore, the bottle-shaped can 1 of the present embodiment
Can fill the contents in the conventional PET bottle filling line, and does not require facility investment such as installing a new filling line.

Further, in the conventional can body 2 of the bottle type can, the mouth portion 10 and the can body 2 are integrally formed.
When performing the above process, it was necessary to insert the mold up to the mouth portion 10 from the bottom of the can body 2. As described above, in the conventional bottle-shaped can, the mold for processing the mouth portion 10 becomes large and the stroke thereof becomes long, so that there is a disadvantage that the cost of the mold is high and the production speed is reduced. On the other hand, in the bottle type can 1 of the present embodiment, the neck member 3 having the mouth portion 10 is provided separately from the can body 2, so that when the male screw portion 9 of the mouth portion 10 or the like is processed. Moreover, since the mold is small and the stroke of the mold is small, the production speed can be increased.

In the above embodiment, the collar portion 8 is provided on the can body 2 and the fixing portion 12 is provided on the neck member 3. However, the invention is not limited to this. The flange 3 may be provided on the member 3.

Next, a bottle type can 31 according to another embodiment of the present invention will be described with reference to FIG. As shown in FIG. 6, in the bottle type can 31 of another embodiment, the can body 2 has a shoulder portion 7.
And the body portion 6 are separately formed, and the lower end edge of the shoulder portion 7 and the upper end edge of the body portion 6 are joined by the second flange portion 32 and the second fixing portion 33. The lower portion of the shoulder portion 7 and the upper portion of the body portion 6 are formed so as to have a smaller diameter than the outer peripheral edge of the can body 2 around the shoulder portion 7, and the outer peripheral edge of the second fixing portion 33 is the shoulder portion 7 and It is formed so as not to project beyond the outer peripheral edge of the body portion 6.

In the second flange portion 32 and the second fixing portion 33 of the bottle type can 31 of another embodiment, the second flange portion 32 is provided at the lower end edge of the shoulder portion 7, and the second fixing portion 33 is Body 6
Is provided at the upper edge of the. Further, as in the above-described embodiment, the second flange portion 32 is sandwiched by the second fixing portions 33, is subjected to high frequency heating, and is welded by the synthetic resin film laminated on the surfaces of these members. Since the other configurations are similar to those of the above-described embodiment, the same configurations are denoted by the same reference numerals and detailed description thereof will be omitted.

The bottle-shaped can 31 of another embodiment is a can body 2.
Since the second collar portion 32 and the second fixing portion 33 are provided in the
The strength of these neighborhoods becomes high. Therefore, the bottle can 3
Even when a force is applied to the can body 2 from the outside during the transportation of 1, the can body 2 is unlikely to be deformed, so that the reduction of the commercial value due to the damage of the can body 2 can be prevented. Further, even when the user holds the shoulder portion 7, the lower portion of the shoulder portion 7 and the upper portion of the body portion 6 have a small diameter. Therefore, the holding of the small diameter portion prevents the user's hand from slipping. Further, also in the other embodiment, similarly to the above-described embodiment, the second flange portion 32 may be provided at the upper end edge of the body portion 6, and the second fixing portion 33 may be provided at the lower end edge of the shoulder portion 7.

Next, a bottle type can 41 according to another embodiment of the present invention will be described with reference to FIG. As shown in FIG. 7, the bottle-shaped can 41 of the present embodiment has a bottom portion 5 a of the can body 2.
Is integrally formed with the body 6 instead of the bottom lid, and is often used as a so-called DR can or DI can for beverage cans.

The can body 2 is formed by deep-drawing or drawing / ironing a blank made of metal such as tin or aluminum alloy, and coated with a synthetic resin coating for surface decoration and protection of the contents. ing. Further, the neck member 3 is formed by squeezing a metal blank as in the above embodiment.
It is formed by ironing, and a synthetic resin coating material is applied to the front and back surfaces thereof, as in the case body 2. Also in this embodiment, the collar portion 8 is provided on the upper end edge of the shoulder portion 7 of the can body 2, and the fixing portion 12 is provided on the lower end edge of the neck member 3.

In the present embodiment, as shown in FIG. 7, the narrowing down of the shoulder portion 7 is shallower than the narrowing down of the above embodiment, and the expansion of the fixing portion 12 of the neck member 3 is increased accordingly. There is. As described above, in this embodiment, the bottle-shaped can 41 is narrowed down from the shoulder 7 to the mouth 10 while being dispersed in the can body 2 and the neck member 3. Also,
In the present embodiment, the collar portion 8 and the fixing portion 12 are joined to each other via the synthetic resin coating material applied to the surfaces thereof, and the synthetic resin coating material is melted to enhance the sealing performance of both members. ing. Since the other configurations of the present embodiment are the same as those of the above-described embodiment, the same reference numerals are given to the same configurations and detailed description thereof will be omitted.

As described above, the bottle-shaped can 41 of this embodiment
Is a so-called DR can or DI
Although the neck member 3 is provided on the can, the production speed of the can body 2 can be improved because the shoulder 7 need not be narrowed down when the can body 2 is formed.

In the bottle-shaped can 41 of the above-described embodiment, the synthetic resin paint applied to the front and back surfaces of the can body 2 and the neck member 3 is melted at the joining portion to enhance the hermeticity. However, not limited to this, an adhesive may be applied to the joint surfaces of both members to enhance the hermeticity. Also, the front and back of one member is coated with a synthetic resin film,
The front and back of one member may be coated with a synthetic resin paint, or both members may be melted, or an adhesive may be applied to the joint. Alternatively, both members may be joined by winding and fastening so that the collar portion 8 is sandwiched by the fixing portion 12 without melting.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a bottle type can which is an example of an embodiment of the present invention.

FIG. 2A is an explanatory view showing a joint portion between a neck member and a can body in a state where a cap is tightened, and FIG. 2B is a partially enlarged cross-sectional view of FIG. 2A showing a collar portion and a fixing portion. Fig.

3 (a) and 3 (b) are explanatory views showing a joining process of a neck member and a can body.

4A to 4C are explanatory views showing a cap mounting process.

FIG. 5 is an explanatory view showing a state where the user holds the bottle-shaped can of the present embodiment in his / her hand.

FIG. 6 is a partial cross-sectional view showing a bottle-shaped can according to another embodiment.

FIG. 7 is a partial cross-sectional view showing a bottle-shaped can according to another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bottle type can, 2 ... Can body, 3 ... Neck member, 4 ... Cap, 7 ... Shoulder part, 8 ... Collar part, 12 ... Fixed part.

Claims (5)

[Claims] 1. A bottle-shaped can formed of a metal member, wherein a bottomed cylindrical can body having a shoulder portion whose diameter decreases upward and the can body are formed separately. A tubular neck member having an opening at the top and a cap covering the opening, and the outer circumferential direction is provided over the entire circumference at either the upper edge of the shoulder of the can body or the lower edge of the neck member. A flange part projecting on the other side, and a fixing part which is joined to the entire circumference of the flange part on the other side, and the outer peripheral edge of the flange part protrudes in the outer peripheral direction more than the outer peripheral edge of the cap. A bottle-shaped can. 2. An unsealing display portion is provided at a lower end edge of the cap to display the fact that the cap has been unsealed by being protruded in an outer peripheral direction from an outer peripheral edge of the cap when the unsealing is performed. The flange portion and the fixing portion are provided in close proximity to each other, and the outer peripheral edge of the flange portion projects in the outer peripheral direction from the outer peripheral edge of the unsealed display portion after the cap is opened. The bottle-shaped can according to claim 1. 3. The lower end edge of the neck member has a diameter larger than that of the mouth portion, and the upper end edge of the shoulder portion has a reduced diameter reduction amount in accordance with the lower end edge of the neck member having the enlarged diameter. The bottle-shaped can according to claim 1 or 2. 4. The can body is separately formed on the shoulder portion and a body portion located below the shoulder portion, and the can body is entirely formed on either the lower end edge of the shoulder portion or the upper end edge of the body portion. 2. A second collar portion projecting in the outer circumferential direction over the circumference is provided, and a second fixing portion joined to the entire circumference of the second collar portion is provided on the other side. The bottle-shaped can according to any one of 3 above. 5. Synthetic resin films are attached to both front and back surfaces of the can body and the neck member, and the collar portion and the fixing portion or the second collar portion and the second fixing portion are caulked to each other. And is welded by the synthetic resin film.
The bottle-shaped can according to any one of items 1 to 4.