JP2002282977A - Can body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a can body capable of positioning a pattern and an uneven part accurately when the uneven part is formed on the outer face of a can barrel on which the pattern is printed. SOLUTION: The can body C is provided with the pattern 11 which is printed on the outer peripheral face of the can barrel 1, a recess 12 which is positioned in the pattern 11 and worked, and a mark 4 for positioning the pattern 11 and the recess 12. The mark 4 is provided at a position 15 mm higher than a ground part 6 of the can barrel 1 as a reference.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can body having a pattern printed on the outer surface of a can body, and a concavo-convex portion processed in alignment with the pattern.

[0002]

2. Description of the Related Art In recent years, for the purpose of improving design, by forming a concave portion or a convex portion in alignment with a pattern (characters or designs) printed on the outer peripheral surface of a can body, the pattern is raised. Can bodies that are depressed or depressed have been developed. When forming a concave portion or a convex portion (hereinafter, referred to as an “irregular portion”), a positioning mark is printed together with the pattern in order to perform positioning with the pattern, and the position of the printed mark is detected. Then, based on the detection result, the processing position of the concave and convex portion with respect to the pattern is determined. Conventionally, the mark is printed near the bottom of the can body.

[0003]

By the way, the vicinity of the bottom of the can body on which the alignment mark is printed may be dented or damaged when the can body is transported in each processing step. For example, when a can body constituting a so-called two-piece can is transported from the printing / drying process to the next process,
Multiple conveyed by airflow conveyor at the same time,
During the transportation, it collides with the side wall of the conveyor or collides with the adjacent can body, so that mainly the vicinity of the bottom portion is dented or damaged. In particular, when the air flow conveyor stops for a certain period of time for some reason and starts transporting again, the transport starts with a small number of can bodies on the air flow conveyor. When it collides with another can body, it receives a large impact. Further, there has been a phenomenon that ring-shaped dirt adheres to the outer peripheral surface due to the influence of static electricity in the vicinity of the bottom portion. As described above, the vicinity of the bottom of the can body is easily dented, scratched, or stained.Therefore, when the printing position of the mark is set near the bottom of the can body, mark detection may not be performed with high accuracy. Along with this, there has been a problem that the alignment between the pattern and the concave and convex portions cannot be performed with high accuracy.

On the other hand, by setting the printing position of the mark at the upper part of the can body, it is conceivable to avoid dents and scratches received during transportation. However, since the upper portion of the can body is subjected to a tensioning process during necking or winding around a can lid, if a mark is provided on the tensioned portion, the upper portion of the can body is stretched along with the tensioning process to have a distorted shape. Since the upper part of the can body is close to the drinking spout, when the irregularly shaped mark is arranged on the upper part of the can body, it gives a discomfort when drinking.

The present invention has been made in view of such circumstances, and when forming an uneven portion on the outer surface of a can body on which a pattern is printed, it is possible to accurately align the pattern with the uneven portion and to drink In this case, an object is to provide a can body that does not cause discomfort.

[0006]

According to a first aspect of the present invention, there is provided a can body, comprising: a pattern printed on an outer surface of a can body; a concave portion processed in alignment with the pattern; In a can having at least one of the protrusions, the outer surface includes the alignment mark, and the mark includes:
It is characterized by being provided at a position higher than 15 mm with respect to the grounding portion of the can body. According to the present invention, the alignment mark is set to 15 m with respect to the grounding portion of the can body.
By providing the position higher than m, the mark is not affected even if the vicinity of the bottom of the can body is dented, scratched, or stained. Therefore, since the mark can be detected with high accuracy by detecting the mark, the pattern can be accurately aligned with the uneven portion when forming the uneven portion on the outer surface of the can body on which the pattern is printed. Here, the pattern is a character or a design printed on the outer surface of the can body.

[0007] A can body according to a second aspect is the can body according to the first aspect, further comprising a necking portion on an upper portion of the can body, and the mark is provided at a position lower than the necking start position. It is characterized by the following. According to the present invention, by providing a mark at a position lower than the necking start position of the can body, it is possible to provide a mark at a position of the can body that is not pulled by a pulling process such as a necking process or a tightening process with a can lid. Can be. Therefore,
Since the mark does not disturb the shape due to the above processing, it does not give any discomfort when drinking.

According to a third aspect of the present invention, in the can body of the first aspect, the mark is provided near an opening end of the can body. According to the present invention, the mark is provided in the vicinity of the opening end of the can body, and after filling the contents (beverage) into the can body, the can body and the can lid are tightly wound. Hides in the background. Therefore, when drinking, it does not cause discomfort.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a can body of the present invention.
This will be described with reference to FIG. FIG. 1 is an external view showing a can body of the present invention, and FIG. 2 is a sectional view showing a recess. In FIG.
The can body C includes a can body 1 formed in a cylindrical shape with a bottom, and a can lid 2 attached to an open end of the can body 1.
It is configured as a piece can. The can body 1 includes a pattern 11 printed on the outer peripheral surface (outer surface), and a concave portion 12 to be processed aligned with the pattern 11. In the present embodiment, the pattern 11 is configured by the letter “M” (design).

At a predetermined position on the outer peripheral surface of the can body 1 that is separated from the pattern 11, a mark used for positioning the concave 12 and the pattern 11 when forming the concave section 12 on the outer peripheral surface of the can body 1. 4 are provided. The mark 4 is set in a substantially rectangular shape in a plan view, and is provided at a position higher than at least 15 mm with respect to the grounding portion 6 of the can body 1. That is, the lower side of the substantially rectangular mark 4 is set at a height of at least 15 mm or more from the ground portion B.

A necking portion 7 is formed at an upper portion of the can body 1. The mark 4 is provided at a position lower than the necking start position 7a of the necking portion 7. That is, the upper side of the substantially rectangular mark 4 is set at least below the necking start position 7a of the necking portion 7.

That is, the mark 4 is located below the necking start position 7a of the necking portion 7 and above the position 6a which is 15 mm above the grounding portion 6 as a reference.
Is set to be provided in the range of.

The grounding portion 6 is a lower end surface of a rim portion 8 of the bottom portion 3 of the can body 1 protruding in the can axis direction. The mark 4 is set so as to be provided on the outer peripheral surface of the can body 1 other than the bottom portion 3.

The mark 4 having a substantially rectangular shape in a plan view is formed to be long in the circumferential direction of the can body 1. The reason why the mark 4 is lengthened in the circumferential direction of the can body 1 is to avoid erroneously detecting another pattern as the mark 4 when aligning the pattern with the concave portion (alignment in the circumferential direction). This is to prevent detection failure of the mark 4 due to minute dirt. The shape of the mark 4 is not limited to the rectangular shape shown in FIG. 1, but various shapes can be applied. That is, the shape of the mark 4 is appropriately set according to the characteristics of a sensor for detecting the mark on the can body and the mechanism of the alignment, or the required alignment accuracy.

As shown in FIG. 2, the concave portion 12 is formed in a predetermined shape and depth by a molding process described later. In the present embodiment, the pattern 11 and the concave portion 12 are aligned such that the edge portion of the pattern 11 shown in FIG. 1 substantially matches the edge portion (inclined portion) of the concave portion 12.

FIG. 3 shows a pattern 11 and a mark 4 on a can body 1.
FIG. 2 is a schematic configuration diagram of a can printing apparatus 20 that further prints a background color of the can body 1. As shown in FIG. 3, the can printing apparatus 20 includes:
An ink applying mechanism 20A and a can moving mechanism 20B are provided. The ink applying mechanism 20A includes an inker unit 21 for supplying ink, and a blanket cylinder 28 for printing ink by contacting the inker unit 21, copying the ink, and then contacting the can C. The inker unit 21 includes an ink source 22, a ducting roll 23, an intermediate roll 24, a rubber roller 25, and a plate cylinder (plate cylinder) 26, which receive ink from the ink source 22 in order. Are in contact with each other. A plurality of blankets 27 are provided on the outer peripheral surface of the blanket cylinder 28. The blanket 27 is configured to be in contact with a plate (not shown) formed on the outer peripheral surface of the plate cylinder 26 and to be in contact with the can C. The can moving mechanism 20B includes a can shooter 29 for taking in the can body C, and the can shooter 29.
And a mandrel turret 32 for sequentially rotating and moving the cans C supplied from the printer in the direction of the ink applying mechanism 20A. The mandrel turret 32 is provided with an application mechanism 20C for applying a transparent overburnish to the surface of the can C to which the transfer has been completed.

In the can printing apparatus 20, different colors of ink from the respective ink sources 22 adhere to the plate of each plate cylinder 26 via the ducting roll 23, the intermediate roller 24 and the rubber roller 25, respectively. Is applied as an image on the blanket 27, and this image is printed while contacting the can C held by the mandrel 31. Thereby, as shown in FIG.
The pattern 11, the mark 4, and the background portion are printed.

FIGS. 4A and 4B are diagrams showing the configuration of an embossing device 35 for forming (embossing) the concave portion 12 in accordance with the pattern 11, wherein FIG. 4A is a side view, and FIG. 4B is an inner roller 36 and an outer roller 37. FIG. 3 is a view as viewed from above.
As shown in FIG. 4, the embossing device 35 includes an inner roller 36 and an outer roller 37 on which a mold for forming is formed, and these are a drive system 38, a gear 39,
It is configured to perform synchronous rotation (the rotation direction is the opposite direction) via the reference numeral 40. A molding recess corresponding to the pattern 11 printed on the can body 1 is formed on the outer peripheral surface of the inner roller 36, and the outer peripheral surface of the outer roller 37 has the same shape as the molding concave of the inner roller 36. Forming projections are formed. Further, a part of the outer peripheral surface of the outer roller 37 is formed to have a small diameter, and when the small diameter portion faces the inner roller 36, the can C can be detachably attached to the inner roller 36. Further, a chuck 38 for holding the can C is disposed at a position axially separated from the inner roller 36. The chuck 38 is disposed so as to be freely driven in the axial direction of the inner roller 36 via a guide mechanism 39, and has a configuration in which the rotation of the can C held by the servomotor 40 can be controlled. Further, the chuck 38 is provided with a sensor 41 for detecting the mark 4 formed on the can body 1. The detection signal from the sensor 41 is output to the control device 42, and the control device 42 controls the drive of the servomotor 40 based on the detection signal. Further, the control device 42 includes a drive system 38 for the inner roller 36 and the outer roller 37, and is configured to perform overall control of the entire device.

In the embossing device 35, a chuck 38
Is moved toward the inner roller 36 via the guide mechanism 39, the inner roller 36 is inserted into the can body 10b. Then, the inner roller 36 and the outer roller 37 rotate synchronously, and the can body C is sandwiched and pressed between the molding concave portion formed on the inner roller 36 and the molding convex portion formed on the outer roller 37, The recess 12 is formed on the outer peripheral surface of the can body C.

In this forming process, the alignment of the processing position between the pattern 11 printed on the outer peripheral surface of the can body C and the concave portion 12 is performed by detecting the position of the mark 4 by the sensor 41. That is, under the control device 42,
Until the mark 4 provided on the can body C is detected by the sensor 41, the can body C held by the chuck 38 is rotated via the servomotor 40, and when the mark 4 is detected, the rotation of the can body C is performed. To stop. At this time, the control device C controls the pattern 11 printed on the can body 1 so as to be in a predetermined direction.
A predetermined time (for example, several milliseconds) after the mark 4 is detected
A predetermined rotation control, such as stopping the rotation of the can C after elapse of c), or stopping the rotation of the can C when the start of the mark 4 is detected and the end of the mark 4 is detected. I do. Prior to the rotation control on the can C, the control device C controls the inner roller 36 and the outer roller 37 via the drive system 38 so that the dies formed on the inner roller 36 and the outer roller 37 are oriented in predetermined directions. The rotation position is controlled. Thus, the pattern 11 printed on the can C is aligned with the molds formed on the inner roller 36 and the outer roller 37. This positioning operation may be performed before the inner roller 36 is inserted into the can body 1 or the can body C
May be performed after the inner roller 36 is inserted into the inside.

Incidentally, in a two-piece can having a bottomed cylindrical can body 1 and a can lid 2, the can body 1 is formed by a cupping press step of forming a general shape of a can body from a metal plate such as an aluminum plate.・ Ironing process, trimming process for adjusting the height of the can body, washing process for cleaning, surface treatment and drying of the can body, printing process for printing a pattern on the outer peripheral surface of the can body, drying for drying the printed surface Process, overcoating process to apply outer paint to protect printed surface, baking process to bake outer paint, inner coating process to paint on inner surface of can body, baking process to bake inner paint, printing on outer surface of can body Embossing process to raise or lower the pattern by forming irregularities along the patterned pattern, necking process to reduce the opening end of the can body, flan to form the flange It is produced through ring step, and the like.

The mark 4 is printed together with the pattern 11 in the mark forming area AR (see FIG. 1) of the can body 1 by the above-described can printing apparatus 20. The can body 1 that has undergone the printing step and the drying step of the mark 4 is conveyed by an air flow conveyor 60 as shown in FIG. 5 when it is conveyed to the next step (overcoating step, baking step, etc.). As shown in FIG. 5, the air flow conveyor 60 includes a conveyor 61
And a plurality of airflow portions 62 provided on the surface of the conveyor portion 61 for ejecting air, and guide walls 63 provided on both sides of the conveyor portion 61. The plurality of can bodies 1 having undergone the printing process are arranged on the conveyor section 61 in an upright state, and are conveyed based on the jet from the airflow section 62.

At this time, the can body 1 conveyed by the airflow conveyor 60 collides with the guide wall 63 during the conveyance or collides with the adjacent can body, and mainly the bottom portion 3 is conveyed.
The neighborhood is dented or damaged. In particular, when the air flow conveyor 60 stops for a certain period of time for some reason and starts transporting again, the transport starts with a small number of can bodies on the air flow conveyor 60, and the can bodies are urged by the jet from the air flow unit 62. It is conveyed well and receives a large impact when it collides with the guide wall 63 or another can body. Furthermore, ring-shaped dirt may adhere to the outer peripheral surface near the bottom portion 3 due to the influence of static electricity.

However, since the positioning mark 4 is provided at a position higher than at least 15 mm with respect to the grounding portion 6 of the can body 1, for example, the vicinity of the bottom portion 3 of the can body 1 is dented, scratched, or contaminated. Does not affect the mark 4. Therefore, when embossing is performed on the can body 1 by the embossing device 35, the sensor 4
Since the mark 1 can detect the mark 4 with high accuracy, when forming the concave portion 12 on the outer peripheral surface of the can body 1 on which the pattern 11 is printed, the pattern 11 and the concave portion 12 can be accurately positioned.

Further, by providing a mark at a position lower than the necking start position 7a of the can body 1, the can body 1 is pulled by a pulling process such as a necking step, a flanging step, or a step of tightening the can lid 2. The mark 4 can be provided at a position where the mark 4 cannot be formed. Therefore, since the mark 4 does not disturb the shape due to the above-described tensile processing, it does not cause discomfort when drinking.

FIG. 6 is a diagram showing another embodiment of the present invention. As shown in FIG. 6, the mark 4 is provided at the opening end of the can body 1. By providing the mark 4 near the opening end of the can body 1 and filling the can body 1 with the contents (beverage) and then winding the can body 1 and the can lid 2 together, the mark 4 becomes Hides in the background. Therefore, when drinking, it does not cause discomfort.

In each of the above-described embodiments, a can body 1 having a cylindrical shape with a bottom and a can lid 2 attached to an open end of the can body 1 are provided.
The mark 4 is provided for a two-piece can having the following. The mark 4 is used to align the pattern 11 with the recess 12. However, for example, cans of other forms such as a so-called three-piece can The positioning operation of the mark of the present invention and the pattern using the mark and the concave and convex portions can be applied to the body.

In each of the above embodiments, the mark 4 is used to align the pattern 11 with the concave portion 12 recessed inside the can body 1. It is of course possible to align the pattern with the pattern.

[0029]

As described above, according to the present invention,
Mark for alignment is 15
By providing the position higher than mm, even if the vicinity of the bottom of the can body is dented, scratched, or stained, the mark is not affected. Since the mark can be detected with high accuracy by detecting the mark, the pattern can be accurately aligned with the uneven portion when forming the uneven portion on the outer surface of the can body on which the pattern is printed.
Further, by providing the mark at a position lower than the necking start position of the can body, the mark can be provided at a position of the can body that is not pulled by the pulling process such as the necking process and the tightening process with the can lid. Therefore, the mark does not disturb the shape due to the above processing, and does not give any discomfort when drinking. Similarly, by providing a mark in the vicinity of the opening end of the can body, after filling the can body with the contents (beverage), when the can body and the can lid are tightened, the mark is hidden behind the tightened portion. It does not cause discomfort when drinking because it is invisible.

[Brief description of the drawings]

FIG. 1 is an external view showing an embodiment of a can according to the present invention.

FIG. 2 is a sectional view showing a recess.

FIG. 3 is a schematic configuration diagram illustrating a can printing apparatus.

FIG. 4 is a schematic configuration diagram showing an embossing device;
(A) is a side view, (b) is the figure which looked at the inner roller and the outer roller from above.

FIG. 5 is a schematic configuration diagram showing a can transport device.

FIG. 6 is an external view showing another embodiment of the can body of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Can body 2 Can lid 3 Bottom part 4 Mark 6 Grounding part 7 Necking part 7a Necking start position 8 Rim part 11 Pattern (character, design) 12 Concave part (uneven part) C Can body

Claims (3)

[Claims] 1. A can body having a pattern printed on an outer surface of a can body, and at least one of a concave portion and a convex portion processed in alignment with the pattern, wherein the alignment mark is formed on the outer surface. Provided, the mark is 15 mm with reference to the grounding portion of the can body
A can body, which is provided at a higher position. 2. The can body according to claim 1, further comprising a necking portion on an upper portion of the can body, wherein the mark is provided at a position lower than the necking start position. 3. The can body according to claim 1, wherein the mark is provided near an opening end of the can body.