JP3478181B2 - Can body - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can body in which a pattern is printed on the outer peripheral surface of a can body, and a concave portion and / or a convex portion is formed on at least a part of the pattern by aligning with the pattern. The present invention relates to a can body in which a positioning mark is formed on the outer peripheral surface of a can body to ensure that a pattern and a concave portion and / or a convex portion are aligned with each other.

[0002]

2. Description of the Related Art In recent years, a can body having concave and / or convex portions formed on the can body has been developed for reasons such as a variety of designs and an improvement in the strength of the can body due to a reduction in the thickness of the can body. It is being converted. In this case, if the recesses and / or the protrusions are processed in accordance with the pattern, characters, etc. printed on the can body (these are collectively referred to as patterns in this specification), the design of the can body is improved. For this reason, at least a part of the pattern is processed to have recesses and / or protrusions matching the pattern.

International Publication WO98 / 032 is given as a prior art for processing such a concave portion and / or a convex portion on a can body.
79 “TOOLING AND METHOD THE EMBOSSING OF A CONT
AINER AND THE RESULTING CONTAINER "or the same W
"METHOD OF ORIENTING CANS" of O97 / 21505 is known. In these prior arts, a positioning mark indicating the position of the pattern portion is formed on the can body in order to align the molding means for processing the concave portion and / or the convex portion on the pattern portion of the can body. It is read and the rotation of the can body is controlled so that the pattern comes to the position corresponding to the forming means.

[0004]

Although these prior arts are excellent inventions, there is room for improvement from the viewpoint of practical use. That is, in the can manufacturing process, the can body may become dirty or dust may adhere, but in such a case, the sensor may mistake the dirt as a positioning mark. Further, in a case body such as a three-piece can whose body is a welded body made of metal, the sensor may mistake the welded portion as a positioning mark.

As described above, when the forming means processes the concave portion and / or the convex portion in a state in which the dirt, the attached dust or the welded portion of the can barrel is mistaken for the positioning mark, the pattern portion and the concave portion and / or The protrusions will be misaligned, and the commercial value of the can will be lost.

The present invention has been made in view of the above circumstances, and when the can body is contaminated with dirt or dust, or even in the case of a can body having a welded portion, the concave and / or convex portions are processed. An object of the present invention is to provide a can body in which the pattern portion to be subjected to is surely positioned at a position corresponding to the forming means.

[0007]

In order to achieve the above object, the invention according to claim 1 is such that a pattern is printed on the outer peripheral surface of a can body, and at least a part of the pattern is aligned with the pattern. a can body subjected to processing of the recesses and / or projections, positioning mark for positioning the pattern at predetermined positions, Oh form two or more on the outer circumferential surface of the can body
And of the two or more positioning marks,
At least one positioning mark
A position for stopping the pattern so that it faces in a predetermined direction.
This is a mark for stopping placement, and at least one other position
The marking mark indicates that the pattern is
Positioning confirmation to confirm whether it is facing in the direction
The mark is a mark for use .

In this way, two or more positioning marks are
I used it and the sensor detected two or more marks accurately.
Only the pattern is positioned at the position corresponding to the forming means.
By doing so, the processing of the concave and / or convex parts is completed with the patterned part.
It is possible to do it in a state in which everything matches.

In particular, two or more positioning marks are positioned.
Therefore, it is used as a stop mark and a positioning confirmation mark.
Thus, the orientation of the pattern can be checked before and after the rotation of the can body is stopped, and the pattern and the recess and / or
Alternatively, the protrusions can be aligned.

The positioning confirmation mark can confirm whether or not the pattern is oriented in a predetermined direction, either before or after processing the recess and / or the projection on the pattern. Therefore, in the invention according to claim 2 , the positioning confirmation mark confirms whether or not the pattern is oriented in a predetermined direction before processing the concave portion and / or the convex portion on the can body. In the invention according to claim 3 , the positioning confirmation mark confirms whether or not the pattern is oriented in a predetermined direction after processing the concave portion and / or the convex portion on the can body. I am trying to do it.

[0011]

According to a fourth aspect of the present invention, the can body is a can body in which a can body outer peripheral surface is covered with a polyester film or an organic coating, and the positioning mark is printed inside the polyester film or the organic coating. It has a structure formed by. As described above, when the can body is covered with the polyester film or the organic film, the forming means does not directly contact the metal part of the can body when the unevenness is processed, and the metal part is not damaged.

In particular, when the pattern is printed on the back surface of the film (the side in contact with the outer peripheral surface of the metal can body), the molding means does not directly contact the ink, so that the pattern is not scratched. When the can body is covered with a polyester film or an organic coating, the same effect can be obtained even if the pattern is printed on the outer peripheral surface of the can body.

The positioning mark can be formed in various ways. Therefore, in the invention according to claim 5 , the positioning mark is formed separately from the pattern, and in the invention according to claim 6 , a part of the pattern is used as the positioning mark. In addition,
When a part of the pattern is used as the positioning mark, it is not necessary to separately form the mark, so that the design of the can body is improved.

As a mode of forming the positioning mark, as in the invention according to claim 7 , the positioning stop mark may be formed longer in the circumferential direction of the can body than the positioning confirmation mark. Alternatively, as in the invention according to claim 8 , the positioning stop mark and the positioning confirmation stop mark may be formed at different positions in the height direction of the can body. Here, when the positioning stop mark is formed longer than the positioning confirmation mark, both marks can be distinguished by discriminating the length of the mark, and both marks are not erroneously recognized. If the check mark is shortened, the mark will move out of the sensor monitoring area even if it is slightly displaced.
Since it can be seen that the position is displaced, the accuracy of detecting the displacement is improved.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a can body according to an embodiment of the present invention will be described with reference to the drawings. [First Embodiment] FIG. 1A is a perspective view of a can body according to a first embodiment of the present invention. The can body 10 shown in FIG.
It is a three-piece can consisting of a can body 11, a can lid 12, and a can bottom 13. The can body 11 is made of a thin metal plate, and has a cylindrical shape by welding both ends. Reference numeral 14 denotes the welded portion, but in the present invention, the welded portion 14 includes the portion that is actually welded and the portions on both sides thereof that are not printed. On the outer peripheral surface of the can body 11, "CA
A pattern (character) 15 of "N" is printed. This pattern 1
Although 5 is printed on the outer surface of the can body and then covered with a polyester film or an organic coating, it may be printed on the back surface of the polyester film or the organic coating (the side in contact with the outer surface of the can body). .

The can body 11 is formed with a concave portion 16 of "CAN" while being aligned with the pattern 15. As shown in FIG. 1 (b), the concave portion 16 has a sloping edge so that the can body itself or the portion of the pattern 15 is not damaged by the molding process of the concave portion.

As a mode of forming the pattern 15 and the concave portion 16 so as to be coincident with each other, not only a mode of making the entire pattern and the concave portion coincide with each other, but also a mode of making at least a part of the pattern 15 and the concave portion 16 coincide, for example, the pattern "A" in "CAN"
The recess is processed only on the chisel, or the "A" of the recess "CAN"
There is also a mode in which only the print is applied.

Further, as a molding mode in conformity with the pattern 15, not only one having a recess formed, but also one having a pattern formed into a protrusion or a mixture of recesses and protrusions and so on. Further, as shown in FIG. 2, a mode in which only the edge portion of the pattern 15 is molded into the concave portion 16, a mode in which only the edge portion is molded into the convex portion, or a mode in which the convex portion and the concave portion are mixed is conceivable. .

The pattern 15 and the concave portion 16 are formed in such various modes.
In order to perform the forming process by making the above coincide with each other, it is necessary to accurately align the forming means for forming the concave portion 16 with the pattern 15. The positioning mark 17 is necessary for performing this alignment. In this embodiment, the positioning mark 1
A stop mark (positioning stop mark) 17a
And a confirmation mark (positioning confirmation mark) 17b, and the stop mark 17a.
And a confirmation mark 17b are formed on the same circumference of the can body.

Here, the stop mark 17a is the welded portion 1
It is longer than the width of 4. When the stop mark 17a is made longer than the welded portion 14 and the confirmation mark 17b, the sensor to be described later confirms the stop mark 17a only when a length equal to or longer than a certain length is detected. It is possible to prevent erroneous recognition as the stop mark 17a. The confirmation mark 17b is formed shorter than the stop mark 17a. By shortening the confirmation mark 17b, it is possible to improve the accuracy of detecting the positional deviation.

Stop mark 17a and confirmation mark 17b
The formation positions of the above may be formed on the same circumference of the can body as in the present embodiment, or may be formed at different positions in the can body height direction as shown in FIG.

Next, the concave portion 16 in the can body of the present embodiment.
The molding process will be described. FIG. 4 is a schematic front view of the apparatus showing the relationship among the inner roller, the outer roller and the cam member in the molding apparatus for forming the concave portion, and FIG. 5 is a view of the apparatus according to the embodiment corresponding to the AA arrow view of FIG. It is a partial cutting main part side view.

In FIG. 5, reference numeral 110 denotes a rotary shaft, the left and right ends of which are rotatably supported by frames 111 and 112, and one end (the right end in FIG. 5) is engaged with a driving means (not shown) to rotate the rotary shaft 110. Drive gear 113
Is fixed. Reference numeral 114 denotes a fixed gear, which is fixed concentrically with the rotary shaft 110 to the frame 111 on the left side in FIG. 5, which supports the rotary shaft 110.

Reference numeral 115 denotes a first rotating member which is concentrically fixed to the rotating shaft 110, and the inner roller shaft 101a and the outer roller shaft 102a having the inner roller 101 and the outer roller 102 at the right ends are rotatably and oppositely provided on the periphery of the first rotating member. Multiple sets are supported so that The inner roller shaft 101a and the outer roller shaft 102a are located closer to the center on the same radiation in the first rotating member 115, and the outer roller shaft 102a has a predetermined distance (the radius of the inner roller 101 and the outer roller 102). They are arranged side by side outward with a distance (which is the sum of the radii of the large-diameter portion described later). An inner roller gear 116 meshing with the fixed gear 114 is fixed to the left end of the inner roller shaft 101a, and an outer roller gear 118 meshing with the intermediate gear 117 fixed to the inner roller shaft 101a is fixed to the left end of the outer roller shaft 102a. is there. Thereby, the pair of inner roller shafts 1
01a and the outer roller shaft 102a are rotated by the power from the same drive system, and the rotations are always synchronized in a fixed relationship.

A pattern (CAN) is formed on the outer peripheral surface of the inner roller 101 fixed to the right end of the inner roller shaft 101a.
And a molding recess corresponding to is formed. On the other hand, the outer roller 1 fixed to the right end of the outer roller shaft 102a
In No. 02, a half-circumference has a large-diameter portion and the remaining half-circumference has a small-diameter portion in a cam shape, and the large-diameter portion is formed with a molding convex portion having the same shape (CAN) as the molding concave portion of the inner roller 101. ,
These irregularities for molding form a pair to form a kind of molding die (molding means).

In FIG. 5, reference numeral 119 is a second rotating member,
It is fixed to the rotating shaft 10 integrally with the first rotating member 115. On the peripheral surface of the second rotating member 119 and on the right side of the inner roller 101, the can body holding means 1 is provided.
20 are provided. The can body holding means 120 includes a slide body 122 that slides along a slide guide 121 formed on the second rotating member 119, and a slide body 12.
An oscillating body 125 oscillatably provided around a shaft 124 on a support body 123 fixed to 2, a can bottom chuck 126 rotatably supported on the left side of the oscillating body 125, and the chuck 126 are rotated. Stepping motor 129
And the roller support member 12 protruding on the left side of the rocking body 125.
Can barrel mounting roller 12 rotatably attached to 7a
7, and a cam roller 128 and the like attached to the right side of the rocking body 125. A servo motor may be used instead of the stepping motor 129.

In FIG. 5, reference numeral 130 denotes a fixed member, which is located on the right side of the second rotating member 119 and which has the frame 1
It is fixed at 12. A cam groove 131 is formed on the circumferential side surface of the fixing member 130, and the cam groove 131 is located in the position near the inner roller 101 in the range from (in FIG. 4) to the inner roller 101 on the can body mounting roller 127. 101 is inserted), and in a range other than the above, it is separated from the inner roller 101 (from the can body 11 on the can body placement roller 127 to the inner roller 10).
It is formed at the position where 1 is pulled out). In addition, a cam groove 131 is formed in a portion corresponding to the movement of the can body at a portion connecting a position near the inner roller 101 and a position separated from the inner roller 101.

Reference numeral 132 denotes a connecting body, and a cam roller 133 which is rotatably engaged with the cam groove 131 is attached to the right end, and the left portion is fixed to the slide body 122. Therefore, when the locus of the cam groove 131 changes, the connecting body 132 also moves left and right accordingly.

Reference numeral 140 denotes a cam member, which is arranged outside the inner roller 101 over a range slightly wider than the range from, as shown in FIG. This cam member 14
The position of 0 is the oscillating member 125 when the oscillating member 125 is moved to the left by the cam groove 131 and the inner roller 101 is inserted into the can body 11 on the can body placing roller 127.
It is arranged at the same position as the position of the cam roller 128 provided in.

Further, the cam member 140 pushes the cam roller 28 in the range from to in FIG. 1, and swings the rocking body 125 around the shaft 124 in the direction of the rotary shaft 110. As a result, the can body wall on the side in contact with the outer roller 102 is pressed against the inner roller 101. The basic structure of the molding apparatus up to this point is the same as the technique of Japanese Patent Application Laid-Open No. 9-192763 filed by the present applicant.

Sensors 151 and 152 detect the positioning mark 17 formed on the can body. here,
The sensor 151 for detecting the stop mark is arranged at the position of in FIG. 4, and the sensor 152 for detecting the confirmation mark is arranged at the position of.

The molding apparatus having such a structure operates as follows. When the rotating shaft 110 rotates due to the rotation of the drive gear 113, the first rotating member 115 and the second rotating member 119 are rotated.
Also rotates. As a result, the can body (the can bottom is attached) 1 sent to the molding apparatus from a pretreatment process (not shown) 1
1 is held by the chuck 126 and is conveyed to the position shown in FIG. Here, the sensor 151 detects the stop mark 17a, and the can body 11 is rotated by the servo motor 129 so that the pattern 15 is directed to a predetermined position (a position corresponding to the uneven portion of the molding die). Next, at the position of, the sensor 152 detects the confirmation mark of the can body 11 to determine whether or not the pattern faces the predetermined position.

The rotation control of the servomotor 129 based on the detection signal from the sensor 151, the confirmation of the pattern position based on the detection signal from the sensor 152, and the stop mark 17a based on the detection signals from both sensors 151 and 152 are performed. The control unit (not shown) performs processing such as whether or not the confirmation mark 17b is a normal mark (whether or not it is dirty).

On the other hand, when the rotating shaft 110 rotates, the inner roller gear 116 meshing with the fixed gear 114 acts as a planetary gear to rotate (revolve), and the inner roller 101 rotates.
And the outer roller 102 is rotated via the intermediate gear 117 and the outer roller gear 118. Here, the fixed gear 114 and the inner roller gear 116
Has a gear ratio of 4: 1 and the inner roller gear 11
6 rotates once when it makes a quarter turn along the fixed gear 114.
The gear ratio between the intermediate gear 117 and the outer roller gear 118 is 1: 2. When the intermediate gear 117, that is, the inner roller 101 makes one rotation, the outer roller 102 makes a half rotation in synchronization with the inner roller 101.

When the second rotating member 119 rotates, the cam roller 133 and the connecting member 132 move to the left in accordance with the locus of the cam groove 131 formed in the fixed member 130,
The slide body 122 moves to the left along the slide guide 121, and moves the can body 11 on the can body placement roller 127 toward the inner roller 101. At this time, the center of the inner roller 101 and the center of the can body 11 are substantially aligned with each other, and the outer roller 102 has a small-diameter portion facing the inner roller 101, so that the movement of the can body 11 is prevented. The inner roller 101 is inserted into the can body 11 without being damaged (the position in FIG. 1).

Next, when the first rotating member 115 rotates to the position shown in FIG. 4, the cam roller 128 is pushed by the cam member 140, and the rocking body 125 is rotated by the shaft 1.
24, so that the side wall surface of the can body on the side facing the outer roller 102 is moved to the inner roller 101.
Press on.

When the first rotating member 115 further rotates in this state, the large diameter portion forming the convex portion for forming is rotated by the rotation of the outer roller 102 toward the side facing the inner roller 101, and the can body 11 is moved. Inner roller 101
And the large diameter portion of the outer roller 102 (FIG. 4).
Position). When the first rotating member 115 further rotates 90 degrees with the can body 11 sandwiched and the can body 11 moves to the position shown in FIG. 4, the inner roller 101 makes one rotation.
The outer rollers 102 rotate by half a revolution, respectively, and form a concave portion aligned with the pattern on the outer peripheral surface of the can body 11 therebetween.

The can body 11 in which the pattern portion is formed in the recess is
When it revolves to the position shown in FIG. 4, the pressing of the cam roller 28 by the cam member 40 is released. As a result, the rocking body 125 rocks in the direction in which the can body 11 is separated from the inner roller 102.

Next, when the can body 11 revolves to the position shown in FIG. 4 by the rotation of the second rotating member 119, the inner roller 101 of the cam groove 131 formed in the fixing member 130.
The cam roller 133, the slide body 122, and the oscillating body 125 move to the right in accordance with the locus away from the can body 1.
Inner roller 101 comes out from 1. In this way, the can body 10 of the first embodiment is processed into the concave portion in the pattern portion.

In this embodiment, the confirmation mark 17 is used.
Although the example of performing whether or not the pattern is directed to a predetermined position in the stage before forming the concave portion is described using b, it is determined whether or not the pattern is directed to the predetermined position after the concave portion is formed. That is, it is possible to confirm whether or not the positions of the pattern 15 and the concave portion 16 match. In this case, the sensor 152 is arranged at the position of or in FIG.

[Second Embodiment] FIG. 6 is a perspective view of a can body according to a second embodiment of the present invention. In this embodiment, a part of the pattern is used as a positioning mark. Specifically, the underlined part which is a part of the pattern 15 is used as the stop mark 17a and the confirmation mark 17b. According to this embodiment, the positioning marks 17 (17a, 17a)
Since b) is melted in the pattern 15, the positioning mark 17 does not impair the design. In addition,
As a mode in which a part of the pattern is used as the positioning mark 17,
The present invention is not limited to that of the present embodiment, and various forms can be considered.

[Third Embodiment] FIG. 7 is a perspective view of a can body according to a third embodiment of the present invention. This embodiment includes a so-called can body 11 and a can lid 12 each having a bottom.
It is applied to a piece can. In the case of a two-piece can, there is no welded portion, so the welded portion is not mistaken for a positioning mark. Therefore, the positioning mark 17 including the stop mark 17a and the confirmation mark 17b can be formed small.

Although the first to third embodiments of the can of the present invention have been described, the present invention is not limited to these embodiments. For example, in the case of a three-piece can body in which the pattern and the concave and / or convex positions are slightly tolerant to each other, use only the stop mark as the positioning mark and omit the confirmation mark. You can also That is, it is possible to use only one positioning mark.

Of course, the modifications described in the first embodiment can be applied to the second and third embodiments and other embodiments.

[0046]

According to the can body of the present invention having the above-mentioned structure, when the can body is contaminated with dirt or dust, or even in the case of a body having a welded portion, the recess and / or the can body is provided. The pattern portion on which the convex portion is processed can be reliably positioned at a position corresponding to the forming means.

[Brief description of drawings]

1A is a perspective view of a can body according to a first embodiment of the present invention, and FIG. 1B is an enlarged cross-sectional view of a recess.

FIG. 2 is a perspective view showing a modified example of the can body according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing another modified example of the can body according to the first embodiment of the present invention.

FIG. 4 is a schematic front view of a device showing a relationship among an inner roller, an outer roller, and a cam member in a device for forming a can on a can body in a state of matching a pattern.

5 is a side view of a part of a main part of a device cut along the line AA of FIG. 4;

FIG. 6 shows a perspective view of a can body according to a second embodiment of the present invention.

FIG. 7 shows a perspective view of a can body according to a third embodiment of the present invention.

[Explanation of symbols]

10 cans 11 can barrel 14 Weld 15 patterns 16 recess 17 Positioning mark 17a Stop mark 17b Confirmation mark

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References: Kaihei Hei 2-133217 (JP, U) International Publication 97-021505 (WO, A1) International Publication 98/003280 (WO, A1) (58) Fields investigated ( Int.Cl. ⁷ , DB name) B21D 51/26 B21D 51/30 B21D 51/46 G01B 11/24

Claims (8)

(57) [Claims] 1. A can body in which a pattern is printed on an outer peripheral surface of a can body, and at least a part of the pattern is processed with a concave portion and / or a convex portion in alignment with the pattern. positioning mark for positioning to a predetermined position, the Yes and formed on the outer circumferential surface of the can body two or more, and, among the two or more positioning marks less when
One of the positioning marks is
Positioning to stop the pattern so that it faces in the specified direction
Is a stop mark, and at least one other positioning
The mark shows that the pattern is in the specified direction when the can is stopped.
Positioning checker for checking whether or not the
A can that is characterized by being a bark. 2. The positioning confirmation mark is for confirming whether or not the pattern is oriented in a predetermined direction before processing the concave portion and / or the convex portion on the can body. The can body according to Item 1 . 3. The positioning confirmation mark is for confirming whether or not the pattern is oriented in a predetermined direction after processing the concave portion and / or the convex portion on the can body. The can body according to Item 1 . 4. The can body in which the outer peripheral surface of the can body is covered with a polyester film or an organic coating, and the positioning mark is formed by printing inside the polyester film or the organic coating. The can body according to any one of 1 to 3 . Wherein the positioning mark, can body according to any one of claims 1 to 4 which is separately formed with the pattern. 6. As the positioning mark, can body according to any one of claims 1 to 4 using a portion of the pattern. 7. The can body according to claim 1 , wherein the positioning stop mark is formed longer in the circumferential direction of the can body than the positioning confirmation mark. Wherein said positioning and stop marks the positioning confirmation stop marks, can body according to any one of claims 1 to 7, is formed in the height direction at different positions of the can body.