JP3970591B2 - Can lid winding device for 3 piece cans for beverages - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the winding of a can lid in a three-piece can for beverages in which a cylindrical can body formed by welding both ends of a rectangular can body blank is tightened with a can lid having a mouth forming portion that can be opened. It relates to a fastening device.
[0002]
[Prior art]
As a can containing beverages, a cylindrical can body, a can lid formed with a mouthpiece wound around the top of the can body, and a bottom lid wound around the bottom of the can body It is known that a constructed three-piece can is employed.
[0003]
This type of three-piece can body is formed into a cylindrical shape by welding both ends of a rectangular steel blank. The weld is formed in a straight line over the entire length of the can body in the height direction. On the other hand, the can lid wound around the upper part of the can body is scored roughly in the shape of an ellipse between the approximate center of the disk-shaped panel and a part of the periphery (that is, close to a part of the periphery). The mouthpiece forming portion that can be opened by breakage is provided. The mouthpiece forming portion is broken along the score by pulling up a tab attached to a substantially central portion of the can lid panel via a rivet so that the mouthpiece can be easily formed.
[0004]
By the way, conventionally, in the manufacture of this kind of three-piece can, the position of the welded portion of the can body and the position of the mouthpiece forming portion of the can lid are not considered at all, and the can lid is wrapped around the can body. Has been done. For this reason, a three-piece can in which the mouthpiece forming part of the can lid wound around the can body is located close to the welded part of the can body may be manufactured. When drinking beverages, there is an inconvenience that the slight unevenness of the welded portion touches the lips and feels uncomfortable.
[0005]
[Problems to be solved by the invention]
The present invention eliminates such inconvenience, and the present invention prevents the discomfort during drinking by preventing lip contact with the welded portion of the can body when drinking from the mouth of the can lid. An object of the present invention is to provide a can lid clamping device for a can.
[0006]
[Means for Solving the Problems]
In order to achieve this object, the present invention provides a conveying means for conveying a cylindrical can cylinder formed by welding both ends of a rectangular can cylinder blank, and one end of the can cylinder conveyed by the conveying means. A can lid supply means for supplying a can lid provided with a mouth forming portion that can be opened near a part of the periphery at a position facing the opening with a gap, and supplied by the can lid supply means, together with the can body A can lid tightening device for a beverage three-piece can comprising: a tightening means for tightening the can lid transported by the transport means on a can body; the can lid supply means and the tightening means in the transport means Detecting means for detecting the position of the welded portion of the can body and the mouthpiece forming portion of the can lid facing each other with a gap in one end opening of the can body, and the welded portion by the detecting means When it is detected that the mouthpiece forming part is close to And a rotating means for separating the welding portion is rotated only one of the cylinder and the can lid and the mouthpiece forming portion in a circumferential direction, said detecting means, the entire periphery of the other end opening of the can body Based on the image captured by the imaging unit, the imaging unit including an imaging unit that captures an image of the mouthpiece forming part on the inner surface side of the can lid from the other end opening side of the can body through the inside of the can body The position of the welding part exposed to the opening edge of the other end of the can body and the mouth forming part of the can lid is detected .
[0007]
According to the present invention, when the can body is conveyed toward the winding means by the conveying means, the can lid is supplied by the can lid supply means, and the can lid is provided at one end opening of the can body. The can lids face each other with a gap. Then, when the can body and the can lid are conveyed by the conveying means while maintaining the state where the can lid is opposed to the one end opening of the can body, the detection means forms the welded portion of the can body and the mouthpiece of the can lid. The position with the part is detected. Next, when it is detected by the detecting means that the welded portion and the mouthpiece forming portion are close to each other, the can body or the can lid is rotated by the rotating means, and the mouthpiece forming portion is removed from the welded portion. Then, the can lid is wound around the can body by the winding means. Further, when it is detected by the detecting means that the welded portion and the mouthpiece forming portion are separated from each other, the can body and the can lid are not rotated by the rotating means, and then the winding tightening means. Thus, the can lid is wound around the can body.
[0008]
As described above, according to the present invention, the detection unit and the rotation unit are provided at a position between the can lid supply unit and the winding unit in the transport unit, thereby forming a welded portion and a mouthpiece. Tightening by the winding means is performed in a state where the part is separated from the part. This makes it possible to produce a three-piece beverage can that prevents the lip from coming into contact with the welded portion of the can body when drinking a beverage from the mouth of the can lid, thereby eliminating the uncomfortable feeling during drinking.
[0010]
Further, at the position where the detection means is provided, the can lid supplied by the can lid supply means faces one end opening of the can body, and the other end opening edge of the can body is exposed by the conveying means. Be transported. Since the welded portion is formed linearly over the entire length of the can barrel by welding both ends of the can barrel blank, the end of the welded portion is located at any position on the periphery of the other end opening. Exposed. Furthermore, from the other end opening side of the can body, the inner surface side of the can lid facing the one end opening can be faced through the inside of the can body. Therefore, in the present invention, the imaging means is provided in the detection means, and the welded portion and the mouthpiece forming portion are imaged from the other end opening side of the can body by the imaging means. As a result, the positional relationship between the can lid and the mouthpiece forming portion can be easily detected in a short time.
[0011]
Further, in the present invention, the transport means includes a can body holding portion that rotatably holds the can body around its axis, and the rotation means covers the can body transported by the transport means over a predetermined transport distance. An endless belt that rotates while contacting, a driving pulley and a driven pulley that span and support the endless belt, driving means that drives rotation of the endless belt via the driving pulley, and endlessness via the driving means Control means for controlling the rotational speed of the belt, and the control means detects the conveyance speed of the can body when it is detected by the detection means that the welded portion and the mouthpiece forming portion are separated from each other. The endless belt is rotated to convey the can body without rotating, and when it is detected by the detection means that the welded portion and the mouthpiece forming portion are close to each other, For transport speed By rotating the endless belt in synchronism become speed, characterized in that for a given angular rotation of the can body by.
[0012]
According to the present invention, the rotating means includes the endless belt that rotates while being in contact with the can body conveyed by the conveying means, so that the can body being conveyed can be easily rotated. That is, when the endless belt is rotated at a speed synchronized with the conveyance speed of the can body, the can body being conveyed does not rotate, and the endless belt is rotated at a speed asynchronous with the conveyance speed of the can body. In some cases, the can body being transported rotates. When the detecting means detects that the welded portion and the mouthpiece forming portion are close to each other, the control means makes the rotation of the endless belt asynchronous with the conveyance speed of the can body. Since the can body is rotated by a predetermined angle under the control, the welded portion and the mouthpiece forming portion can be reliably separated. Further, the control means is configured to synchronize the rotation of the endless belt with respect to the conveyance speed of the can body when the detection means detects that the welded portion and the mouthpiece forming portion are separated from each other. Since it controls, the state which a welding part and a spout formation part leave | separate can be maintained reliably, without rotating a can body.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory plan view showing a part of the configuration of the winding device of the present embodiment, FIG. 2 is an explanatory plan view showing a part of the transport means, and FIG. 3 is an explanation of the transport means at the rotational position of the can body. FIG. 4 is an explanatory view showing a schematic configuration of the detection means, FIG. 5 is an explanatory plan view showing a state where the mouthpiece forming portion of the can lid is close to the welded portion of the can body, and FIG. 6 is a can lid. It is an explanatory top view which shows the state which the mouthpiece formation part of 1 left | separated from the welding part of the can body. 5 and 6 show the can body and the can lid in a transported state. Unlike the normal vertical direction when used as a beverage can, the can lid is located immediately below the can body and The inner surface side of the can lid is shown.
[0014]
The winding device 1 of the present embodiment is configured to wind a can lid 3 around a can body 2 of a beverage three-piece can. If it demonstrates with reference to FIG. 3, the can body 2 will be formed in the cylindrical shape by welding the both ends of the rectangular steel can body blank, and the welding part 4 formed by welding is a can. The body 2 is formed linearly over the entire length in the height direction from the one end opening 5 to the other end opening 6. If the can lid 3 is described with reference to FIG. 5, it is a steion tab type, and an opening operation tab 9 is attached to a substantially central portion of the panel 7 via a rivet 8. The front end of the tab 9 faces a mouthpiece forming portion 11 surrounded by a score 10 that can be easily opened, and a gripping portion 12 for hooking a finger during a swinging operation is provided at the rear end portion of the tab 9. Around the tab 9 attached to the panel 7 is formed a recess 13 that substantially corresponds to the shape of the tab 9 and the shape of the mouthpiece. Further, a bead 14 is formed in the mouthpiece forming unit 11. The concave portion 13 and the bead 14 can be confirmed from the inner surface side of the can lid 3, and the position of the tab 9 and the mouthpiece forming portion 11 can be clearly confirmed based on the concave portion 13 and the bead 14.
[0015]
First, the winding device 1 of this embodiment will be described. In FIG. 1, reference numeral 15 denotes a first winding means for first fastening the can body 3 to the can body 2, and 16 denotes a transport means for transporting the can body 2 and the can lid 3 to the first winding means 15. , 17 is a can lid supply means for supplying the can lid 3 toward the transport means 16. On the upstream side of the conveying means 16, a neck-in forming means for forming a neck-in at the end of the can body 2, a flange-forming means for forming a flange, and the like are disposed, and on the downstream side of the first winding means 15. There are provided a second winding means 18 for applying a second winding to the can body 2 on the can lid 3 and a discharging means 19 for delivering the can body 2 subjected to the double winding of the can lid 3. Yes.
[0016]
The conveying means 16 includes a plurality of can body holding portions 20 having a shape recessed in an outer peripheral portion thereof, and the can body 2 held by each can body holding portion 20 faces the first winding fastening means 15. Rotate in the direction of transport. As shown in FIGS. 2 and 3, each can body holding portion 20 includes a magnet 21 that attracts the can body 2 and a plurality of rotatable contact rollers 22 that contact the outer wall of the can body 2. . The can body 2 of each can body holding portion 20 is applied with an attractive force by the magnet 21 and is pressed against each contact roller 22 with a gap from the magnet 21. Thereby, in each can body holding | maintenance part 20, the can body 2 is rotatably hold | maintained around the axis line.
[0017]
Further, as shown in FIG. 1, a can lid holding table 23 for movably placing and holding the can lid 3 supplied by the can lid supply means 17 is provided below each conveying means 16. It is provided along the conveyance direction. As shown in FIG. 3, the can lid holding table 23 includes a can lid guide portion 24 that protrudes along the outer peripheral edge thereof. Further, as shown in FIGS. 3 and 4, each can barrel holding portion 20 of the transport means 16 holds the can lid 3 on the can lid holding table 23 in the lower portion thereof, along with the can barrel 2 in the transport direction. A can lid holding portion 25 is provided for pushing. Thus, when the transport means 16 rotates, the can lid 3 is transported together with the can body 2 at a position immediately below the one end opening 5 of the can body 2.
[0018]
As shown in FIG. 1, the conveying means 16 is provided with a rotating means 26 for rotating the can body 2 held by the can body holding portion 20. As shown in FIG. 2, the rotating means 26 spans a drive pulley 27 that is rotationally driven by a drive motor (drive means) (not shown), a driven pulley 28 that is rotatably provided, and both pulleys 27, 28. The endless belt 29 is provided.
[0019]
Further, as shown in FIG. 1, the position upstream of the rotating means 26 and where the can lid supply means 17 is delivered to the can lid holding portion 25 of the transport means 16 is shown in FIG. As described above, the imaging means 30 for imaging the peripheral edge of the other end opening 6 of the can body 2 and the inner surface side of the can lid 3 from above the can body 2, and the other end opening of the can body 2 during imaging by the imaging means 30 Illuminating means 31 for illuminating the peripheral edge of 6 and the inner surface side of the can lid 3 is provided. The imaging unit 30 transmits image information to the image processing unit 32, and the image processing unit 32 controls a signal (a detection signal described later) obtained by performing predetermined image processing to control the rotation unit 26. Transmit to means 33. The imaging means 30, the illumination means 31, and the image processing means 32 constitute the detection means of the present invention.
[0020]
Next, the operation of the winding device 1 of this embodiment will be described. First, as shown in FIG. 1, the can body 2 delivered from the upstream to the transport means 16 is held and transported by the can body holding portion 20 of the transport means 16, and the can lid 3 is moved by the can lid supply means 17. Supplied. As shown in FIG. 4, the inner surface side of the can lid 3 is opposed to the lower side of the one end opening 5 of the can body 2 held by the can body holding portion 20. 2 and the can lid 3 are conveyed downstream while maintaining a state where they face each other.
[0021]
At the position where the can lid 3 is supplied below the can body 2, the can body 2 and the can lid 3 are imaged by the imaging means 30. The imaging means 30 detects the position of the welded part 4 by image processing in the image processing means 32 by imaging the periphery of the other end opening 6 of the can body 2. At the same time, the imaging means 30 images the inner surface of the can lid 3 from above the other end opening 6 of the can body 2 through the inside of the can body 2, and the mouthpiece forming unit 11 ( 5) is detected.
[0022]
At this time, when the image processing means 32 detects that the mouthpiece forming unit 11 is located at a position close to the welded portion 4, as shown in FIG. 5, the detection signal is shown in FIG. It is transmitted to the control means 33. The control means 33 makes the endless belt 29 asynchronous with respect to the conveying speed of the can body 2 via the drive motor (indicated by reference numeral 34 in FIG. 4) and the drive pulley 27 shown in FIG. Control to be.
[0023]
2 and 3, when the can body 2 is transported by the transport means 16 while being in contact with the endless belt 29 of the rotating means 26, the endless body rotates asynchronously with respect to the transport speed of the can body 2. The can body 2 is rotated around its axis by the belt 29. At this time, the control means 33 shown in FIG. 4 rotates the can body 2 by a predetermined angle (for example, 180 °) in accordance with the rotational speed at which the endless belt 29 is asynchronous with respect to the transport speed of the can body 2. Further, the endless belt 29 is in contact with the can body 2 and, as shown in FIG. 3, the can body 2 and the can lid 3 face each other with a gap therebetween, so Only the can body 2 held by the part 20 is rotated. At this time, since the can body 2 to which an attractive force is applied by the magnet 21 of the can body holding portion 20 is in contact with the contact roller 22, the can body 2 is smoothly rotated by the rotation of the endless belt 29. As a result, the mouthpiece forming portion 11 is separated from the welded portion 4 as shown in FIG. Thereafter, the sheet is conveyed by the conveying means 16 toward the first winding fastening means 15.
[0024]
When the image processing means 32 detects that the mouthpiece forming portion 11 is located away from the welded portion 4 as shown in FIG. 6, the control means 33 Based on the signal, the drive motor is controlled via the drive motor 34 and the drive pulley 27 so that the rotation of the endless belt 29 is synchronized with the conveyance speed of the can body 2.
[0025]
2 and 3, when the can body 2 is transported by the transport means 16 while being in contact with the endless belt 29 of the rotating means 26, the endless belt rotates in synchronization with the transport speed of the can body 2. The can body 2 is conveyed by 29 without being rotated with respect to the can body holding portion 20. As a result, as shown in FIG. 6, the mouthpiece forming portion 11 is maintained in a state of being separated from the welded portion 4, and is conveyed toward the first winding tightening means 15 by the conveying means 16.
[0026]
As described above, the mouthpiece forming part 11 is conveyed toward the first winding fastening means 15 in a state of being separated from the welded part 4 by the cooperation of the detecting means and the rotating means 26. The can lid 3 can be wound around the can body 2 with the mouthpiece forming portion 11 being separated from the welded portion 4 in the fastening means 15. As shown in FIG. 3, a gap is formed between the can lid 3 and the can body 2 at the position of the rotation means 26, but when the can body 2 passes through the rotation means 26, the gap is illustrated. The can body 2 held in the can body holding portion 20 by the can body lowering means is lowered toward the can lid 3 so that the can body 2 and the can lid 3 are brought into close contact with each other, and the first winding means It is conveyed toward 15. After that, as shown in FIG. 1, the can body 2 having the can lid 3 subjected to the double tightening through the second winding tightening means 18 is paid out from the winding device 1 by the discharging means 19.
[Brief description of the drawings]
FIG. 1 is an explanatory plan view showing a configuration of a part of a winding fastening device according to an embodiment of the present invention.
FIG. 2 is an explanatory plan view showing a part of a conveying unit.
FIG. 3 is an explanatory view of a longitudinal section of a conveying means at a rotation position of the can body.
FIG. 4 is an explanatory diagram showing a schematic configuration of detection means.
FIG. 5 is an explanatory plan view showing a state in which a mouthpiece forming part of the can lid is close to a welded part of the can body.
FIG. 6 is an explanatory plan view showing a state where the mouthpiece forming part of the can lid is separated from the welded part of the can body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Winding device, 2 ... Can trunk, 3 ... Can lid, 4 ... Welding part, 5 ... Opening at one end, 6 ... Opening at the other end, 11 ... Spout forming part, 15 ... First winding fastening means (winding means) ), 16, conveying means, 17, can lid supply means, 20, can body holding part, 26, rotating means, 27, driving pulley, 28, driven pulley, 29, endless belt, 30, imaging means, 33, control means. , 34... Drive motor (drive means).

Claims (2)

A conveying means for conveying a cylindrical can body formed by welding both ends of a rectangular can body blank, and a position opposed to one end opening of the can body conveyed by the conveying means with a gap, A can lid supply means for supplying a can lid provided with a mouth opening forming portion close to a part of the periphery, and the can lid supplied by the can lid supply means and transported by the transport means together with the can body In a can lid winding device for a beverage three-piece can comprising a fastening means for fastening to a trunk,
In a position between the can lid supply means and the winding means in the transport means, there is a welded portion of the can body and a mouthpiece forming portion of the can lid that is opposed to the one end opening of the can body with a gap. A detecting means for detecting the position, and when the detecting means detects that the welded portion and the mouthpiece forming portion are close to each other, the welding portion is rotated by rotating only one of the can body and the can lid. And a rotating means for separating the mouthpiece forming part in the circumferential direction ,
The detection means images the entire periphery of the other end opening of the can body and images the mouthpiece forming portion on the inner surface side of the can lid from the other end opening side of the can body through the inside of the can body. A beverage comprising imaging means and detecting a position of a welded portion exposed to the opening edge of the other end of the can body and a mouthpiece forming portion of the can lid based on an image taken by the imaging means A can lid winding device for a 3-piece can. The transport means includes a can body holding portion that rotatably holds the can body around its axis,
The rotating means includes an endless belt that rotates while contacting a can body conveyed by the conveying means over a predetermined conveying distance, a driving pulley and a driven pulley that support the endless belt over the driving pulley, and via the driving pulley. Drive means for driving the rotation of the endless belt, and control means for controlling the rotation speed of the endless belt via the drive means, the control means comprising the welding means and the mouthpiece forming part by the detection means. Is detected at a position where the can body is separated, the endless belt is rotated in synchronization with the transport speed of the can body, and the can body is transported without rotating. 2. When it is detected that the forming unit is in a position close to the forming part, the endless belt is rotated at a speed asynchronous with the conveying speed of the can body, and the can body is rotated by a predetermined angle. described Seaming apparatus the can lid in 3-piece cans postal.

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