Heating apparatus and can body manufacturing system

Abstract

To reduce heating unevenness when heating an image formed on a can body by using a heat source provided on a lateral side of a transport path on which the can body is transported.SOLUTION: A rotation mechanism 710 blows a gas against a can body support part 620, thereby rotating the can body 100 as shown in (A). More specifically, the rotation mechanism 710 blows the gas against the site of the can body support part 620 deviated from a shaft center 620A (rotary shaft 639) of the can body support part 620, thereby rotating the can body support part 620 and rotating the can body 100 in a circumferential direction. An outer peripheral part 620E of the can body support part 620 is provided with a projection 620G projecting toward an outside direction in a radial direction of the can body support part 620 as shown in (B). The rotation mechanism 710 blows the gas against the projection 620G, thereby rotating the can body support part 620 and rotating the can body 100 in the circumferential direction.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a heating device and a can body making system. [Background technology]

[0002] Patent Document 1 discloses a process for manufacturing bottle cans, which includes a printing / overcoating and baking process, an inner surface painting and baking process, a necking process, and a screw processing process. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-289381 A Summary of the Invention [Problem to be solved by the invention]

[0004] When manufacturing a can body on which an image is formed, the image formed on the can body may be heated. Here, when the image formed on the can body is heated using a heating source arranged on the side of the transport path of the can body, the part of the image facing the heating source is likely to be heated, and other parts of the image may not be heated enough. An object of the present invention is to reduce uneven heating when heating an image formed on a can body using a heat source provided on the side of the transport path along which the can body is transported. [Means for solving the problem]

[0005] The heating device to which the present invention is applicable is a heating device that includes a conveying means for conveying a can body on which an image is formed along a conveying path, a heat source provided on the side of the conveying path, and a rotating means for rotating the can body moving along the conveying path. Here, the rotation means may apply resistance to the outer peripheral surface of the cylindrical can body moving along the conveying path, or may apply resistance to the outer peripheral surface of a can body support part that supports the can body moving along the conveying path, thereby rotating the can body in the circumferential direction of the can body. In addition, as a member functioning as the rotation means, a side member is provided that is arranged to the side of the conveying path and along the conveying path, and the outer peripheral surface of the can body moving along the conveying path comes into contact with the side member, thereby applying a resistance force to the outer peripheral surface, or the outer peripheral surface of the can body support part moving along the conveying path comes into contact with the side member, thereby applying a resistance force to the outer peripheral surface, thereby rotating the can body in the circumferential direction of the can body. The rotating means may rotate the can bodies by blowing gas against the can bodies moving along the transport path or against a can body support part that supports the can bodies. In addition, the rotation means may be configured to blow gas against a portion of the cylindrical can body that is offset from the axis of the can body, or to blow gas against a portion of the can body support part that is offset from the axis of the can body support part, thereby rotating the can body in the circumferential direction of the can body. In addition, a protrusion protruding toward the outside in the radial direction of the can body support part is provided on the outer periphery of the can body support part, and the rotation means may rotate the can body support part by blowing gas onto the protrusion, thereby rotating the can body in the circumferential direction of the can body. The rotating means may also rotate the cylindrical can bodies in a circumferential direction by applying vibration to a can body support portion that supports the can bodies moving along the conveying path. In addition, the can body may be rotated at least once by the rotating means from when the conveying means starts conveying the can body to when the conveying means finishes conveying the can body. In addition, the rotation means may rotate the can body so that all parts of a band-shaped region extending around the entire circumference of the cylindrically formed can body face the heating source at least once. The conveying path may be provided with a curvature imparting section in which a curvature is imparted to the can bodies so that the traveling direction of the can bodies is changed, and the rotating means may be provided in the curvature imparting section. In addition, the rotation means may be provided on the side of the conveying path, on the side of the portion where the curvature imparting portion is provided, and on the side opposite to the side on which the center of curvature of the curvature imparting portion is located.

[0006] Furthermore, when the present invention is considered as a can body manufacturing system, the can body manufacturing system to which the present invention is applicable is a can body manufacturing system that includes an image forming unit that forms an image on the outer surface of a can body, and a heating device that heats the image formed on the can body by the image forming unit, and that manufactures can bodies with an image formed thereon, and the heating device is configured to include any of the heating devices described above. Effect of the Invention

[0007] According to the present invention, when an image formed on a can body is heated using a heat source provided on the side of the transport path along which the can body is transported, uneven heating can be reduced. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 illustrates a can body manufacturing system. [Diagram 2] FIG. 1 illustrates an example of a printing device. [Diagram 3] 1A and 1B are diagrams illustrating a first heating device. [Figure 4] 1A and 1B are diagrams illustrating a transport mechanism. [Diagram 5] FIG. 11 is a diagram showing another configuration example of the first heating device. [Figure 6]13(A) and 13(B) are diagrams showing other configuration examples of the heat reflecting portion. [Figure 7] 13A and 13B are diagrams showing another example of the configuration of the transport mechanism. [Figure 8] 13A to 13C are diagrams showing other shapes of the protrusions. [Figure 9] FIG. 11 is a diagram illustrating another example of the configuration of the first heating device. [Figure 10] 10 is a view of the can body supporting portion and the like as viewed from the direction indicated by the arrow X in FIG. 9. FIG. [Figure 11] 11A and 11B are diagrams illustrating another example of the configuration of the rotation mechanism. [Figure 12] 13A and 13B are diagrams showing another example of the configuration of the transport mechanism. [Figure 13] 1A and 1B are perspective views of a can body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a diagram showing a can body manufacturing system 1 according to the present embodiment. In the can body manufacturing system 1, a can body 100 (not shown in FIG. 1) is manufactured, which is made of metal and has a cylindrical shape and a bottom, and has an image formed on its outer peripheral surface, which is an example of an outer surface. The manufactured can body 100 is filled with a beverage. The beverage is not particularly limited, and the manufactured can body 100 is filled with, for example, an alcoholic beverage such as beer or chuhai, or a soft drink (non-alcoholic beverage). After filling with the beverage, a lid member is attached to the can body 100, and a beverage can filled with the beverage is completed.

[0010] 1, the can body manufacturing system 1 is provided with a printing device 200 that prints on a can body 100. The printing device 200 of this embodiment, which functions as an image forming section, is an inkjet printing device, and forms an image on the outer peripheral surface of the can body 100 using the inkjet method. It should be noted that the printing device 200 is not limited to an inkjet printing device, but may be a printing device that performs printing using a method other than the inkjet method, such as a plate-type printing device.

[0011] The inkjet printing device 200 refers to a printing device that performs printing by ejecting ink, which is an example of paint, from an inkjet head and attaching the ink to the can body 100. Known inkjet printing methods can be used in the printing device 200. Specifically, for example, a piezo method, a thermal (bubble) method, a continuous method, etc. can be used.

[0012] Moreover, the plate-type printing device 200 refers to a printing device that performs printing using a plate. In the plate-type printing device 200, ink, which is an example of paint, is applied to the plate, and then the ink applied to the plate is transferred to the can body 100, thereby printing on the can body 100. This transfer may be performed by directly contacting the plate with the can body 100, or by placing an intermediate transfer body between the plate and the can body 100 and transferring the image to the can body 100 via this intermediate transfer body. Here, examples of printing using a plate include letterpress printing, intaglio printing, lithographic printing, and stencil printing, and any of these may be used for printing using a plate.

[0013] FIG. 2 is a diagram showing an example of a printing device 200. As shown in FIG. The printing device 200 shown in FIG. Specifically, there are provided a first inkjet head 411Y that ejects yellow ink, a second inkjet head 411M that ejects magenta ink, a third inkjet head 411C that ejects cyan ink, and a fourth inkjet head 411K that ejects black ink.

[0014] The four inkjet heads 411 are arranged so as to extend in a direction perpendicular to the moving direction of the can body 100 (a direction perpendicular to the paper surface in the figure). Also, each of the four inkjet heads 411 is arranged so as to extend along the axial direction of the can body 100 being transported. Each of the four inkjet heads 411 is disposed above the transport path of the can body 100, and ejects ink toward the can body 100 located below. In this embodiment, ink is ejected from each of the four inkjet heads 411 onto the can body 100 that is positioned below and rotates in the circumferential direction, thereby forming an image on the outer circumferential surface of the can body 100.

[0015] In this embodiment, as shown in FIG. 1, a device for performing processes other than printing processes is provided upstream of the printing device 200 in the transport direction of the can bodies 100. Specifically, in this embodiment, an uncoiler (UC), a lubricator (LU), a cupping press (CP), a body maker (BM), a trimmer (TR), and a washer (WS) are provided in this order from the upstream side in the conveying direction of the can body 100. The uncoiler (UC) unwinds the coiled aluminum sheet. The lubricator (LU) applies lubricant to the aluminum sheet. The cupping press (CP) punches out a circular blank and then draws it to form a cup-shaped material.

[0016] In the body maker (BM) that performs the forming, the cup-shaped material is subjected to drawing and ironing processes to make the peripheral wall a predetermined thickness. The bottom is then formed into a dome shape. This results in a cylindrical can body 100 that has an opening on one side and a bottom on the other side. The trimmer (TR) trims and straightens the edge portion on the upper part of the peripheral wall of the can body 100. In other words, the trimmer (TR) removes the end portion of the can body 100 on the opening side. In the washer (WS), the can body 100 is washed, lubricating oil and other deposits are removed, and a chemical coating treatment is performed as necessary.

[0017] Furthermore, a first heating device 300 is provided downstream of the printing device 200 in the transport direction of the can body 100. The first heating device 300 heats the image formed on the outer surface of the can body 100, and prints the image onto the can body 100. In other words, the first heating device 300 heats the paint made of ink that is attached to the outer surface of the can body 100, and hardens the paint. If necessary, a clear paint may be applied on top of the paint made of ink (outside the paint in the radial direction of the can body 100) and heated together with the ink to harden it. The first heating device 300 heats the image formed on the can body 100 by the printing device 200 functioning as an image forming section, and hardens the image.

[0018] On the downstream side of the first heating device 300, an inside spray (INS) and a second heating device 400 are provided. In inside spray (INS), paint is applied to the inner surface of the can body 100. In other words, in inside spray (INS), the inner surface is painted. In inside spray (INS), paint is sprayed onto the inner surface of the can body 100 to paint the inner surface. In the second heating device 400, the paint attached to the inner surface of the can body 100 is heated and baked, whereby the paint attached to the inner surface of the can body 100 is cured.

[0019] Furthermore, a smooth die necker flanger (hereinafter referred to as "necker flanger") (SDN) is provided downstream of the second heating device 400 as an example of a diameter reducing process. The necker flanger (SDN) reduces the diameter of the opening of the can body 100 and forms a flange for attaching a can lid. Through the above processes, an empty can body 100 is completed. This empty can body 100 is shipped after an inspection process (not shown) and transported to a beverage filling process (not shown). Then, in this filling process, the empty can body 100 is filled with the beverage, and a can lid is attached to the can body 100 after it has been filled with the beverage.

[0020] Although not shown, a base coater (BC) and a third heating device 500 (not shown) may be further provided between the washer (WS) and the printing device 200. In the base coater (BC), a base layer (base coat layer) is formed by applying a colored paint such as white paint to the outer peripheral surface of the can body 100. In the third heating device 500, this base layer is heated and hardened. The above-mentioned processes and devices provided in the can body manufacturing system 1 are merely examples, and some of the processes and devices may be deleted, other processes and devices may be added, or the processes may be interchanged or changed.

[0021] 3(A) and (B) are diagrams illustrating the first heating device 300. FIG. Fig. 3(A) is a top view of the first heating device 300, and Fig. 3(B) is a front view of the first heating device 300. In other words, Fig. 3(B) is a view of the first heating device 300 as viewed from the direction indicated by the arrow IIIB in Fig. 3(A). As shown in FIG. 3(A), the first heating device 300 of this embodiment is provided with a conveying mechanism 600 as an example of a conveying means for conveying a can body 100 on which an image has been formed by the printing device 200 (see FIG. 1) along a predetermined conveying path 300R.

[0022] 3(A), the first heating device 300 is provided with a plurality of heating sources 310 arranged side by side in the conveying direction of the can body 100 on the sides of the conveying path 300R along which the can body 100 is conveyed. In this embodiment, a plurality of heating sources 310 are provided on both one side 30X and the other side 30Y of the conveying path 300R. It is preferable to arrange the heat source 310 so that the distance between the heat source 310 and the can body 100 is 5 mm to 100 mm when the heat source 310 is positioned opposite the can body 100. The distance between the heat source 310 and the can body 100 is more preferably 25 mm to 50 mm.

[0023] Further, on each of one side 30X and the other side 30Y of the conveying path 300R, a flow path 320 is provided between adjacent heating sources 310 for passing gas supplied to the can bodies 100 on the conveying path 300R. In this embodiment, a gap 319 is provided between the heat sources 310 adjacent to each other in the can body transport direction, which is the transport direction of the can body 100. In this embodiment, the gap 319 serves as a flow path 320, and gas is supplied to the can body 100 through the gap 319 (details will be described later).

[0024] Furthermore, in this embodiment, as shown in FIGS. 3(A) and (B), a gas supply mechanism 350 is provided as an example of a gas supply means for supplying gas through a flow path 320 to the can bodies 100 on the transfer path 300R. As shown in Fig. 3(B), the gas supply mechanism 350 is composed of a heater 351, a blower 352 serving as an air source, and two supplied parts 353 to which the gas sent by the blower 352 is supplied. Fig. 3(B) shows only one of the supplied parts 353 located on one side 30X.

[0025] 3A, the supplied portion 353 is provided on each of one side 30X and the other side 30Y of the transport path 300R. The inside of the supplied portion 353 is hollow. The supply portion 353 provided on one side 30X of the conveying path 300R is disposed on the opposite side to the side on which the conveying path 300R is provided, sandwiching a plurality of heating sources 310 provided on one side 30X of the conveying path 300R. In addition, the supply section 353 provided on the other side 30Y of the conveying path 300R is also positioned on the opposite side to the side on which the conveying path 300R is provided, sandwiching a plurality of heating sources 310 provided on the other side 30Y of the conveying path 300R.

[0026] The heater 351 and the blower 352 are disposed below the transport path 300R of the can body 100, as shown in FIG. 3(B). As described above and as shown in FIG. 3(A), the supplied portions 353 are provided on both the one side 30X and the other side 30Y of the transport path 300R. As shown in FIGS. 3(A) and 3(B), each of the supply recipients 353 is provided with a gas exhaust port 353X on the side where the transfer path 300R is provided. In this embodiment, gas is discharged from this outlet 353X, and the discharged gas passes through the flow path 320 and is supplied to the can body 100 on the transfer path 300R, as shown by an arrow 3C in FIG. 3(A).

[0027] In this embodiment, a heater 351 is provided as part of the gas supply mechanism 350, and the gas supply mechanism 350 heats the gas to be supplied to the can body 100. As a result, in this embodiment, the heated gas is supplied to the can body 100. In this embodiment, air is used as the gas. In this embodiment, heated air is supplied to the can body 100. The components of the gas are not particularly limited, and a gas other than air may be supplied to the can body 100.

[0028] Furthermore, in this embodiment, as shown in FIG. 3(B), an exhaust blower 355 is provided on the ceiling of the first heating device 300, and this exhaust blower 355 exhausts the gas inside the first heating device 300 to the outside of the first heating device 300. Furthermore, in this embodiment, an intake port (not shown) for taking in gas from outside the first heating device 300 into the first heating device 300 is provided. In this embodiment, as the exhaust blower 355 exhausts gas, gas outside the first heating device 300 is supplied into the first heating device 300 through the intake port.

[0029] 4A and 4B are diagrams illustrating the transport mechanism 600. FIG. Fig. 4(A) is a top view of the transport mechanism 600, and Fig. 4(B) is a front view of the transport mechanism 600. In other words, Fig. 4(B) is a view of the transport mechanism 600 as viewed from the direction indicated by the arrow IVB in Fig. 4(A). As shown in Fig. 4B, the transport mechanism 600 is provided with a moving part 610 that moves to the right in the figure. As shown in Fig. 3A, the moving part 610 is formed in a ring shape and performs a circulating movement.

[0030] In this embodiment, a part of the moving section 610 that performs the circulating movement moves along the linear transport path 300R shown in FIG. 3(A). After moving along this linear transport path 300R, the moving section 610 moves in a circulating manner toward the upstream side in the can body transport direction as shown by the arrow 2C in FIG. 3(A). Furthermore, in this embodiment, as shown in FIG. 3(A), a rotating member 611 for applying a driving force to the moving part 610 is provided.

[0031] In this embodiment, the rotating member 611 is rotated in the clockwise direction in the figure by a driving source (not shown) such as a motor, etc. Accordingly, the moving part 610 moves. The moving part 610 is formed of, for example, a chain or a belt. When moving toward the upstream side in the can body conveying direction, the moving part 610 moves through the inside of the first heating device 300 as shown in Fig. 3(A). This suppresses the temperature drop of the moving part 610 compared to when the moving part 610 moves through the outside of the first heating device 300.

[0032] Furthermore, the conveying mechanism 600 is provided with a plurality of can body supporting portions 620 for supporting the can bodies 100, as shown in FIG. 4(B). The can body support part 620 is attached to the moving part 610. In addition, the can body support part 620 is provided in a manner that protrudes upward from the moving part 610. In this embodiment, the can body support part 620 is inserted into the inside of the can body 100, whereby the can body support part 620 supports the can body 100.

[0033] As the moving section 610 moves, each of the can body support sections 620 moves downstream along the conveying path 300R shown in Fig. 3(A) and then turns around and moves in a circulating manner as indicated by the arrows 2C. In Fig. 3(A), the moving section 610 is depicted as moving in a circulating manner horizontally, but it may also move in a circulating manner vertically. As shown in FIG. 4(B), each of the can body support parts 620 is provided with a plurality of rod-shaped members 680 protruding upward, a disk-shaped base 629 supporting the lower ends of the rod-shaped members 680, and a support part 630 supporting the base 629 from below. In this embodiment, the base 629 is rotatable about a rotation axis 639 that extends along the vertical direction.

[0034] Furthermore, in this embodiment, as shown in FIG. 4(B), a rotation mechanism 710 is provided as an example of a rotation means for rotating the can body 100. The can body 100 moves along the conveying path 300R. The rotation mechanism 710 rotates the can body 100 moving along the conveying path 300R.

[0035] The rotation mechanism 710 is realized, for example, by a motor 711 provided in each of the can body supports 620. In this embodiment, the motor 711 is installed inside the support 630 and supported by the support 630. When the motor 711 is driven, a part of the can body support part 620 rotates around a rotation axis 639 extending along the vertical direction, and as a result, the can body 100 supported by the can body support part 620 rotates in the circumferential direction of the can body 100.

[0036] More specifically, in this embodiment, a motor 711 is connected to the base 629, and when the motor 711 is driven, the base 629 rotates in the circumferential direction, and accordingly, multiple rod-shaped members 680 inside the can body 100 move around the rotation axis 639. As a result, the can body 100 supported by the can body support portion 620 rotates in the circumferential direction of the can body 100.

[0037] As the rotation mechanism 710, for example, as shown in FIG. 4(A), a side member 712 may be provided, and the can body 100 may be rotated by this side member 712. In the configuration example shown in FIG. 4(A), this side member 712 is provided as a member that functions as the rotation mechanism 710. The side members 712 are disposed on the sides of the transport path 300R and are disposed along the transport path 300R (in the direction of the transport path 300R).

[0038] When the side members 712 are provided, the outer peripheral surface 621 of the can body supporting portion 620 moving along the conveying path 300R comes into contact with the side members 712. As a result, a resistance force against the movement of the can body supporting part 620 is applied to the outer circumferential surface 621 of the can body supporting part 620, causing the can body supporting part 620 to rotate in the circumferential direction. Accordingly, the can body 100 rotates in the circumferential direction. Even when the side member 712 is provided, the can body support part 620 rotates around a rotation axis 639 (see Figure 4 (B)) extending along the vertical direction, and accordingly, the can body 100 supported by the can body support part 620 rotates in the circumferential direction of the can body 100.

[0039] Here, a configuration has been described in which the outer peripheral surface 621 of the can body support portion 620 contacts the side member 712, but this is not limited thereto, and the side member 712 may also contact the outer peripheral surface 102 of the can body 100 (see FIG. 4(A)). In this case, a resistance force is applied to the outer peripheral surface 102 of the can body 100, causing the can body 100 to rotate in the circumferential direction. More specifically, in this case, the can body 100 rotates relative to the can body support part 620, causing the can body 100 to rotate in the circumferential direction.

[0040] When the side member 712 is brought into contact with the outer peripheral surface 102 of the can body 100, it is preferable to bring the side member 712 into contact with the end portion 102A of the outer peripheral surface 102 (see FIG. 4(B)) that is located on the opening 101 side of the can body 100. A non-formation area, which is an area where no image is formed, is likely to be formed at the end 102A of the outer peripheral surface 102. If the side members 712 are configured to contact the end 102A, it is easy to prevent the side members 712 from contacting the image formed on the outer peripheral surface 102. In this case, defects such as scratches on the image are less likely to occur.

[0041] In the configuration example shown in Figure 4(A), a side member 712 functioning as part of the rotation mechanism 710 applies a resistance force to the outer peripheral surface 621 of the can body support portion 620 that supports the can body 100 moving along the conveying path 300R, or applies a resistance force to the outer peripheral surface 102 of the can body 100 moving along the conveying path 300R. As a result, the cylindrical can body 100 rotates in the circumferential direction of the can body 100. When the can body 100 rotates in the circumferential direction, uneven heating of the image formed on the outer peripheral surface 102 of the can body 100 is less likely to occur than when the can body 100 does not rotate.

[0042] In this embodiment, at the attachment section 361 shown in Figure 3(A), the can body 100 transported from the upstream side is supplied to the can body support section 620 (see Figure 4(B)), and the can body support section 620 begins to support the can body 100. The can body support part 620, which has begun supporting the can body 100, is attached to the moving part 610, and therefore moves downstream along the conveying path 300R (see Figure 3(A)), which is formed in a straight line, as the moving part 610 moves.

[0043] In this embodiment, the image formed on the can body 100 is heated while the can body support part 620 moves downstream along the conveying path 300R. This promotes hardening of the image. Furthermore, in this embodiment, the can body 100 rotates in the circumferential direction while the can body support part 620 moves downstream along the conveying path 300R. This makes it difficult for uneven heating of the image formed on the outer peripheral surface 102 of the can body 100 to occur.

[0044] In this embodiment, when the can body supporting portion 620 reaches the removal portion 362 shown in FIG. 3(A), the can body 100 is removed from the can body supporting portion 620 by a removal mechanism (not shown). Since the can body support part 620 after the can body 100 has been removed is attached to the moving part 610, it returns to the can body attachment part 361 located upstream in the conveying direction of the can body 100.

[0045] The first heating device 300 will be further described. In this embodiment, as shown in FIG. 3(A), the position of the flow path 320 provided on one side 30X in the can body transport direction is aligned with the position of the flow path 320 provided on the other side 30Y in the can body transport direction. In this embodiment, a flow path 320 is provided between a plurality of heating sources 310 provided on one side 30X, and a plurality of flow paths 320 are provided on one side 30X.

[0046] In this embodiment, a flow path 320 is provided between the multiple heat sources 310 provided on the other side 30Y, and the multiple flow paths 320 are provided on the other side 30Y. In this embodiment, the positions of the multiple flow paths 320 provided on one side 30X in the can body transport direction are aligned with the positions of the multiple flow paths 320 provided on the other side 30Y in the can body transport direction.

[0047] Here, as shown in FIG. 3(A), a virtual plane 300H is assumed to be aligned with the can body conveying direction. Furthermore, the flow paths 320 provided on one side 30X and the flow paths 320 provided on the other side 30Y are projected in a direction perpendicular to the can body conveying direction onto this imaginary plane 300H. In this case, in this embodiment, the position of the flow channel 320 provided on one side 30X coincides with the position of the flow channel 320 provided on the other side 30Y on the imaginary plane 300H.

[0048] Next, the heat source 310 will be described. In this embodiment, a heating source 310 that includes a light source and radiates infrared rays from the light source is used as an example of the heating source 310. In other words, in this embodiment, a so-called IR (Infrared Rays) heater is used as the heating source 310. When infrared rays are emitted from the light source, energy is supplied to the image formed on the outer circumferential surface 102 of the can body 100, causing the molecules in the image to vibrate (move). This vibration creates friction between the substances that make up the image, generating heat. This heat heats the image, accelerating its hardening. The heat source 310 that radiates infrared rays is just an example, and the heat source 310 is not particularly limited, and a heat source 310 other than the heat source 310 that radiates infrared rays may be used.

[0049] FIG. 5 is a diagram showing another example of the configuration of the first heating device 300. In FIG. In this configuration example, similar to the above, a plurality of heating sources 310 are provided on one side 30X of the transport path 300R. Also, in this configuration example, a heat reflecting section 390 is provided on the other side 30Y of the transport path 300R. As described above, a plurality of heating sources 310 are provided and arranged side by side in the can body conveying direction. Furthermore, as described above, a flow path 320 is provided between adjacent heating sources 310. This flow path 320 is formed by a gap 319 existing between the heating sources 310.

[0050] The heat reflecting portion 390 reflects heat from a heating source 310 provided on one side 30X toward the transport path 300R. The heat reflecting portion 390 is configured by a so-called mirror and has a function of reflecting light. The heat reflecting portion 390 shown in Fig. 5 is formed so as to be convex toward the transport path 300R. A plurality of heat reflecting sections 390 are provided and are arranged side by side in the can body conveying direction. Furthermore, in this configuration example, a flow path 320 for passing gas supplied to the can body 100 on the conveying path 300R is provided between adjacent heat reflecting sections 390. This flow path 320 is formed by a gap 319 existing between the heat reflecting sections 390.

[0051] In this configuration example, on one side 30X of the transport path 300R, gas is supplied to the can bodies 100 on the transport path 300R through a flow path 320 provided between adjacent heating sources 310, as described above. On the other hand, on the other side 30Y of the transport path 300R, gas is supplied to the can bodies 100 on the transport path 300R through a flow path 320 provided between the heat reflecting sections 390 adjacent to each other.

[0052] Furthermore, in this configuration example, the image formed on the outer peripheral surface 102 of the can body 100 on the conveying path 300R is heated by infrared rays from a heating source 310 provided on one side 30X and infrared rays reflected by the heat reflecting section 390. Although not shown in Figure 5, the first heating device 300 shown in Figure 5 also has a rotation mechanism 710 that rotates the can body, as described above, which makes it less likely that uneven heating of the image formed on the can body 100 will occur.

[0053] 6(A) and (B) are diagrams showing other configuration examples of the heat reflecting portion 390. Figures 6(A) and (B) show the heat reflecting portion 390 as viewed from above. The shape of the heat reflecting portion 390 is not particularly limited. In the configuration example shown in FIG. 5, the heat reflecting portion 390 is formed so as to be convex toward the transport path 300R. Without being limited thereto, as shown in Fig. 6(A), the heat reflecting portion 390 may be given an uneven shape to diffusely reflect infrared rays at the heat reflecting portion 390. Moreover, the heat reflecting portion 390 may be formed in a flat shape as shown in Fig. 6(B).

[0054] In addition, the first heating device 300 may be provided with two or more types of heat reflecting section 390, for example, two or more types of heat reflecting section 390 selected from a first type of heat reflecting section 390 shown in FIG. 5, a second type of heat reflecting section 390 shown in FIG. 6(A), and a third type of heat reflecting section 390 shown in FIG. 6(B). The heat reflecting section 390 may be provided on the ceiling of the first heating device 300, and may direct infrared rays directed upward from the heat source 310 toward the transport path 300R located below.

[0055] 7A and 7B are diagrams showing other configuration examples of the transport mechanism 600. In FIG. Fig. 7(A) is a diagram of the transfer mechanism 600 as viewed from above. Fig. 7(B) is a diagram of the can body support portion 620 and the like as viewed from the direction indicated by the arrow VIIB in Fig. 7(A). In this configuration example, as shown in FIG. 7(A), the rotation mechanism 710 rotates the can body 100 by blowing gas against the can body support portion 620. More specifically, the rotation mechanism 710 blows gas onto a portion of the can body support portion 620 that is off the axis 620A (rotation axis 639) of the can body support portion 620, causing the can body support portion 620 to rotate, and the can body 100 to rotate in the circumferential direction.

[0056] In this configuration example, as shown in FIG. 7(B), a protrusion 620G that protrudes outward in the radial direction of the can body support portion 620 is provided on an outer circumferential portion 620E of the can body support portion 620. In this configuration example, the rotation mechanism 710 rotates the can body support part 620 by blowing gas against the protrusion part 620G, thereby rotating the can body 100 in the circumferential direction. As shown in FIG. 7(A), a plurality of protrusions 620G are provided, and are arranged radially around an axis 620A of the can body support part 620.

[0057] In this configuration example, as shown in FIG. 7(A), a gas exhaust port 713 is provided on the side of the movement path 3W through which the can body support part 620 passes. In this configuration example, gas is discharged from the exhaust port 713 toward the movement path 3W of the can body support part 620 and toward the upstream side in the movement direction of the can body support part 620. In other words, in this configuration example, gas is discharged obliquely toward the upstream side. As a result, in this configuration example, gas is blown onto protruding portion 620G, and can body support portion 620 rotates counterclockwise in the figure as shown by arrow 7A in Fig. 7(A) . Accordingly, can body 100 also rotates counterclockwise in the figure.

[0058] Note that, as an example of the gas discharged from the exhaust port 713, air is given, but the gas is not limited to air and may be other types of gases other than air. In addition, the gas may be exhausted from the exhaust port 713 by providing a dedicated fan for this purpose, or the gas sent out by the blower 352 (see FIG. 3(B)) may be exhausted from the exhaust port 713. Furthermore, the direction in which the gas is discharged from the exhaust port 713 is not limited to the above-mentioned obliquely upstream side, but may be obliquely downstream side. Also, for example, as shown by arrow 7C in FIG. 7(A), the gas may be discharged so that the gas discharge direction and the movement direction of the can body support part 620 are perpendicular to each other.

[0059] When discharging gas so that the gas discharge direction and the movement direction of the can body support portion 620 are perpendicular to each other, it is preferable that the shape of the protrusion portion 620G be the shape shown in Figure 8 (a diagram showing another shape of the protrusion portion 620G). FIG. 8 shows the can body support part 620 and the can body 100 as viewed from above. In the configuration example shown in FIG. 8, the force received by protrusion 620G when gas is blown onto protrusion 620G from one side 631 side of protrusion 620G is greater than the force received by protrusion 620G when gas is blown onto protrusion 620G from the other side 632 side of protrusion 620G.

[0060] In this configuration example, of one side surface 631 and the other side surface 632 of the protruding portion 620G, one side surface is convex and the other side surface is concave. As a result, when the protrusion 620G receives gas, the force acting on the protrusion 620G from the gas differs depending on the side surface of the protrusion 620G. In this case, the amount of rotation of the can body supporting part 620 in one direction indicated by an arrow 8A in the figure is greater than the amount of rotation of the can body supporting part 620 in the other direction indicated by an arrow 8B.

[0061] In this configuration example, when the downstream protrusion 629A, which is the protrusion 620G located downstream in the movement direction of the can body support part 620, among the multiple protrusions 620G, reaches a position opposite the discharge outlet 713, the pressing force of the gas from the discharge outlet 713 pressing against this downstream protrusion 629A becomes smaller. In contrast, in this configuration example, when the upstream protrusion 629B, which is the protrusion 620G located upstream in the movement direction of the can body support portion 620 among the multiple protrusions 620G, reaches a position opposite the discharge outlet 713, the pressing force of the gas from the discharge outlet 713 pressing against this upstream protrusion 629B becomes large.

[0062] In this case, the amount of rotation of the can body supporting part 620 in one direction indicated by an arrow 8A in the figure is greater than the amount of rotation of the can body supporting part 620 in the other direction indicated by an arrow 8B. In this case, after the can body support part 620 passes through the discharge port 713, the can body support part 620 is rotated counterclockwise compared to before passing through the discharge port 713. This causes the phase of the can body 100 to change, making it less likely that uneven heating of the image formed on the can body 100 will occur, compared to when the phase of the can body 100 does not change.

[0063] The gas may be blown not only onto the can body supporting portion 620 but also onto the can body 100. More specifically, gas may be blown onto a portion of the cylindrical can body 100 that is offset from the axial center of the can body 100, such as the outer circumferential surface 102 of the can body 100. In this case, the can body 100 rotates relative to the can body support part 620, and in this case too, the phase of the can body 100 changes. The gas may be blown onto the can body 100 not only onto the outer peripheral surface 102 of the can body 100 but also onto the bottom 100T of the can body 100 (see FIG. 7(B)). More specifically, the gas may be blown onto the can body 100 at a location of the bottom portion 100T that is off the axis 100X of the can body 100.

[0064] When gas is blown onto the can body 100, the hardening of the image formed on the can body 100 is promoted compared to when gas is blown onto the can body support portion 620. In particular, blowing gas against the outer circumferential surface 102 of the can body 100 promotes hardening of the image formed on the can body 100 . When gas is blown against the can body 100, a dedicated fan for blowing may be provided, or gas sent out by a blower 352 (see FIG. 3(B)) may be blown against the can body 100. When the gas delivered by the blower 352 is blown onto the can body 100 , the gas heated by the heater 351 is blown onto the can body 100 . In this case, the hardening of the image formed on the can body 100 is promoted compared to when unheated gas is blown onto the can body 100.

[0065] Fig. 9 is a diagram illustrating another example of the configuration of the first heating device 300. Fig. 10 is a diagram showing the can body support part 620 and the like as viewed from the direction indicated by the arrow X in Fig. 9. In the configuration example shown in Fig. 9, the conveying path 300R for the can body 100 is longer than in the configuration example shown in Fig. 3. Furthermore, in this configuration example shown in Fig. 9, a curvature is imparted to part of the conveying path 300R, and a curvature imparting section 300K at which the traveling direction of the can body 100 changes is provided in part of the conveying path 300R.

[0066] In this configuration example, a plurality of straight portions 300C are provided on the conveying path 300R, and further, a curvature imparting portion 300K is provided. The curvature imparting portion 300K connects the straight portions 300C whose installation positions in the conveying direction of the can body 100 are shifted from each other. In this configuration example, a heat source 310 is provided on one side 91 and the other side 92 of each of the straight portions 300C, and no heat source 310 is provided on the sides of the curvature imparting portion 300K.

[0067] Furthermore, in this configuration example, an attachment portion 361 is provided at the left end of the first straight section 300C located at the top of the figure, and the can body 100 is attached to the can body support portion 620 at this attachment portion 361. Thereafter, the can body support part 620 passes through the first straight portion 300C, the curvature imparting part 300K, and the second straight portion 300C, and returns to the attachment part 361. That is, in FIG. 9, the can body support part 620 is transported clockwise. In addition, in this configuration example, a removal section 362 is provided at the left end of the second straight section 300C located at the bottom in the figure, and the can body 100 is removed from the can body support section 620 at this removal section 362.

[0068] In this configuration example as well, a rotation mechanism 710 for rotating the can body 100 is provided. The rotation mechanism 710 is provided in the curvature imparting section 300K. More specifically, the rotation mechanism 710 is provided on the side of the conveying path 300R, that is, on the side of a portion where the curvature imparting part 300K is provided. Furthermore, the rotation mechanism 710 is provided on one of both sides of the curvature imparting portion 300K, on ​​the opposite side 920, which is the side opposite to the center side 910, which is the side on which the center of curvature 300W of the curvature imparting portion 300K is located. The opposite side 920 has a larger space for installing the rotation mechanism 710 than the center side 910. Providing the rotation mechanism 710 on the opposite side 920 increases the degree of freedom in installing the rotation mechanism 710 and in designing the rotation mechanism 710.

[0069] In this configuration example, as shown in FIG. 10, a rotation mechanism 710 is provided with a protruding portion 719 that protrudes from the opposite side 920 onto the movement path of the can body support portion 620. In this configuration example, an outer peripheral surface 629F of a base 629 of the can body support portion 620 receives a resistance force from the protruding portion 719, and this causes the base 629 supported from below by the support portion 630 to rotate. When base 629 rotates, multiple rod-shaped members 680 move accordingly, causing can body 100 to rotate in the circumferential direction in the same manner as described above. The material of the protruding portion 719 is preferably a material that increases the frictional force acting between the protruding portion 719 and the base 629, such as rubber.

[0070] FIG. 11 is a diagram illustrating another example of the configuration of the rotation mechanism 710. In FIG. FIG. 11 shows the first heating device 300 as viewed from above. In this configuration example, a side member 712 is provided. In this configuration example as well, the side member 712 is provided on the opposite side 920 of the curvature imparting portion 300K. In this configuration example, the outer peripheral surface of the can body support portion 620 receives a resistance force from the side member 712, causing the can body support portion 620 to rotate. More specifically, in this configuration example, an outer peripheral surface 629F of a base 629 of the can body supporting part 620 receives a resistance force from the side member 712, and the can body supporting part 620 rotates. As a result, the can body 100 rotates. The side members 712 are also preferably made of a material that increases the frictional force acting between the side members 712 and the base 629, such as rubber.

[0071] As described above, rotation of the can body 100 by the protrusion 719 (see FIG. 10) or the side member 712 (see FIG. 11) may be achieved by contacting the protrusion 719 or the side member 712 with the outer peripheral surface 102 of the can body 100 (see FIG. 4(B)). When the protrusion 719 or the side member 712 is brought into contact with the outer peripheral surface 102 of the can body 100, as described above, it is preferable that the protrusion 719 or the side member 712 contacts the end portion 102A of the outer peripheral surface 102 that is located on the opening 101 side (see Figure 4 (B)). Additionally, the curvature imparting unit 300K (see Figs. 9 and 11) may be provided with the rotation mechanism 710 shown in Fig. 7. That is, the curvature imparting unit 300K may be provided with the rotation mechanism 710 that rotates the can body 100 by blowing gas thereon.

[0072] In the configuration example shown in Figures 3 to 8, from the time when the conveying mechanism 600 starts to convey the can body 100 to the time when the conveying mechanism 600 finishes conveying the can body 100, all parts of the band region 190, which is a band-shaped region of the outer surface 102 of the can body 100 that extends around the entire circumference of the can body 100, face the heating source 310 at least once. 13(A) and (B) are perspective views of the can body 100. FIG. In this embodiment, of the outer peripheral surface 102 of the can body 100 shown in Figure 13 (A), all portions of the band-shaped region 190 extending in the circumferential direction of the can body 100 and extending around the entire circumference of the can body 100 face the heating source 310 at least once. For example, if the band-shaped region 190 starts from a virtual straight line 191 extending along the axial direction of the can body 100, indicated by the symbol 13A, the region extends from this starting point in the circumferential direction of the can body 100 and in the direction indicated by the arrow 13E in the figure, and finally returns to the starting point. In FIG. 13(A), the band-like region 190 is located from one end 193A to the other end 193B in the axial direction of the can body 100.

[0073] It should be noted that the strip region 190 is not limited to the form shown in FIG. The size of the band-like region 190 in the axial direction of the can body 100 is determined by the dimensions of the heat source 310, that is, the dimensions in the axial direction of the can body 100. For this reason, when this dimension of the heat source 310 is small and, for example, the heat source 310 does not face the portion of the outer circumferential surface 102 of the can body 100 that is located on the opening 101 side, the band-like region 190 will have the form shown in Fig. 13(B). In the configuration examples shown in Figs. 3 to 8, the can body 100 is rotated so that all parts of the band-like regions 190 shown in Figs. 13(A) and (B) face the heating source 310 at least once.

[0074] Here, in the case where not all parts of the band-shaped region 190 are oriented toward the heat source 310 by a single rotation mechanism 710, a plurality of rotation mechanisms 710 are provided. Although not shown in the above, a plurality of rotation mechanisms 710 shown in Figures 7 and 8 may be provided as necessary, and further, the positions of the rotation mechanisms 710 may be offset from each other in the conveying direction of the can body 100. In this case, even if a single rotation mechanism 710 does not cause all parts of the band-shaped area 190 to face the heating source 310, all parts of the band-shaped area 190 will face the heating source 310 by the time the conveying mechanism 600 finishes conveying the can body 100.

[0075] In this embodiment, between the time when the can body 100 reaches a position facing the heating source 310 located most upstream among the multiple heating sources 310 and the time when the can body 100 reaches a position facing the heating source 310 located most downstream, the rotation mechanism 710 causes all parts of the band-shaped region 190 to face the heating source 310 at least once. In the configuration example shown in FIG. 3, the heat source 310 designated by reference symbol 3G is the heat source 310 located most upstream, and the heat source 310 designated by reference symbol 3H is the heat source 310 located most downstream.

[0076] Between the time when the can body 100 reaches a position facing the heating source 310 indicated by the symbol 3G and the time when the can body 100 reaches a position facing the heating source 310 indicated by the symbol 3H, the rotation mechanism 710 causes all parts of the band region 190 to face the heating source 310 at least once. In this case, between the time when heating of the can body 100 by the heat source 310 starts and the time when heating of the can body 100 by the heat source 310 ends, all parts of the band-shaped region 190 face the heat source 310 at least once.

[0077] In the configuration examples shown in Figures 9 and 11, although not all parts of the band region 190 face the heating source 310, the can body 100 is rotated at a rotation angle other than 360° at least once, making it less likely that uneven heating of the can body 100 will occur compared to when the can body 100 is not rotated. In the configuration examples shown in Figures 9 and 11, the heat source 310 indicated by reference symbol 9G is the heat source 310 located most upstream, and the heat source 310 indicated by reference symbol 9H is the heat source 310 located most downstream. 9 and 11, the rotation mechanism 710 rotates the can body 100 at least once at a rotation angle other than 360° between when the can body 100 reaches a position facing the heating source 310 indicated by reference symbol 9G and when the can body 100 reaches a position facing the heating source 310 indicated by reference symbol 9H. This makes it less likely that uneven heating of the can body 100 will occur compared to when the can body 100 is not rotated.

[0078] 3, the heating source 310 is provided on both the one side 30X and the other side 30Y. In this case, the can body 100 is rotated at least 180° from when the heating source 310 starts to heat the can body 100 until the heating source 310 ends to when the heating source 310 stops to heat the can body 100. As a result, from the start of heating the can body 100 by the heating source 310 to the end of heating the can body 100 by the heating source 310, all parts of the band-shaped region 190 face the heating source 310 at least once. As a result, all parts of the band-shaped region 190 are heated by the heating source 310.

[0079] 5, the heat source 310 is provided only on one side 30X of the one side 30X and the other side 30Y. In this case, the can body 100 is rotated at least 360° from when the heat source 310 starts to heat the can body 100 until the heat source 310 finishes heating the can body 100. As a result, in this case too, all parts of the band-shaped region 190 face the heat source 310 at least once between the start of heating the can body 100 by the heat source 310 and the end of heating the can body 100 by the heat source 310. As a result, in this case too, all parts of the band-shaped region 190 are heated by the heat source 310. In other words, in the configuration example shown in Figure 5, the can body 100 is rotated at least once using the rotation mechanism 710 between the time when the conveying of the can body 100 by the conveying mechanism 600 (not shown in Figure 5), which is an example of a conveying means, begins and the time when the conveying of the can body 100 by the conveying mechanism 600 ends. This allows all portions of strip 190 to be directed toward heat source 310 at least once, and all portions of strip 190 are heated by heat source 310.

[0080] 9, the can body 100 is rotated 90° from when heating of the can body 100 by the heat source 310 is started to when heating of the can body 100 by the heat source 310 is finished. In the configuration example shown in FIG 9, the can body 100 is rotated 90° at the location where the rotation mechanism 710 is installed. In this case, the can body 100 is rotated once at a rotation angle other than 360° from the time when heating of the can body 100 is started by the heating source 310 located upstream of the rotation mechanism 710 until the time when heating of the can body 100 is completed by the heating source 310 located downstream of the rotation mechanism 710. In this case, uneven heating of the can body 100 is less likely to occur than when the can body 100 is not rotated at all. 11, the can body 100 is rotated 90° from when heating of the can body 100 by the heat source 310 is started to when heating of the can body 100 by the heat source 310 is finished. As a result, even in the configuration example shown in FIG. 11, the can body 100 is rotated at a rotation angle other than 360°.

[0081] 12A and 12B are diagrams showing other configuration examples of the transport mechanism 600. In FIG. In this configuration example, similarly to the above, a rotation mechanism 710 is provided as shown in FIG. 12(B). The rotation mechanism 710 shown in FIG. 12 rotates the can body 100 formed in a cylindrical shape in the circumferential direction by applying vibration to the can body support part 620 to rotate the can body support part 620. Specifically, in this configuration example, a vibration source 715 is provided on each of the can body supporting parts 620, and the vibration generated by this vibration source 715 causes the base 629 of the can body supporting part 620 to gradually rotate in the circumferential direction.

[0082] This causes the rod member 680 to move around the rotation axis 639 of the can body support portion 620, thereby causing the can body 100 to rotate in the circumferential direction. Here, we have described the case where base 629 rotates due to vibration, but this is not limited to the above. Base 629 may be fixed to support portion 630, and can body 100 may rotate relative to can body support portion 620 due to vibration.

[0083] When the can body 100 is rotated using vibration, the direction of rotation of the can body 100 is difficult to determine, but the can body 100 does rotate, and uneven heating of the image formed on the can body 100 is reduced compared to a configuration in which the can body 100 does not rotate at all. There is no particular limitation on the vibration source 715. For example, an ultrasonic vibrator can be used as the vibration source 715. Alternatively, for example, the vibration source 715 may be a weight attached eccentrically to the rotation shaft of a motor (not shown), and the weight may be rotated by the motor to generate vibration.

[0084] In addition, the location where vibration source 715 is installed is not particularly important, and as described above, vibration source 715 may be provided in each of the can body support parts 620, or vibration source 715 may be installed in moving part 610 (see Figure 12 (B)) and the can body support part 620 may be vibrated by vibrating moving part 610. Alternatively, for example, vibration source 715 may be used to vibrate rotating member 611 (see FIG. 3(A)) to vibrate can body support part 620. When rotating member 611 is vibrated, the vibration is transmitted to can body support part 620 via moving part 610, causing can body 100 to rotate.

[0085] Further, in the above, the first heating device 300 has been described, but the second heating device 400 (see FIG. 1) and the third heating device 500 (not shown) may also be configured in the same manner as the first heating device 300. [Explanation of symbols]

[0086] Reference Signs List 1...can body manufacturing system, 100...can body, 102...outer peripheral surface, 200...printing device, 300...first heating device, 300K...curvature imparting section, 300R...transport path, 300W...center of curvature, 310...heating source, 600...transport mechanism, 620...can body support section, 620A...shaft center, 620G...protruding section, 621...outer peripheral surface, 639...rotating shaft, 710...rotating mechanism, 712...side member, 910...center side, 920...opposite side

Claims

1. A conveying means for conveying the can body on which the image is formed along a conveying path; A heating source provided on a side of the transport path; A rotating means for rotating the can bodies moving along the conveying path; A heating device comprising:

2. The heating device described in claim 1, wherein the rotation means applies resistance to the outer peripheral surface of the cylindrical can body moving along the conveying path, or applies resistance to the outer peripheral surface of a can body support part that supports the can body moving along the conveying path, thereby rotating the can body in a circumferential direction of the can body.

3. As a member functioning as the rotating means, a side member is provided that is disposed on a side of the conveying path and along the conveying path, The heating device described in claim 2, wherein the outer peripheral surface of the can body moving along the conveying path comes into contact with the side member, thereby applying a resistance force to the outer peripheral surface, or the outer peripheral surface of the can body support part moving along the conveying path comes into contact with the side member, thereby applying a resistance force to the outer peripheral surface, thereby rotating the can body in a circumferential direction of the can body.

4. The heating device according to claim 1 , wherein the rotating means rotates the can body by blowing gas against the can body moving along the transport path or against a can body support part that supports the can body.

5. The heating device described in claim 4, wherein the rotation means blows gas onto a portion of the cylindrical can body that is offset from the axis of the can body, or blows gas onto a portion of the can body support portion that is offset from the axis of the can body support portion, thereby rotating the can body in a circumferential direction of the can body.

6. A protrusion protruding outward in the radial direction of the can body support portion is provided on an outer periphery of the can body support portion, The heating device according to claim 5 , wherein the rotating means rotates the can body support portion by blowing gas onto the protruding portion, thereby rotating the can body in a circumferential direction of the can body.

7. 2. The heating device according to claim 1, wherein the rotating means rotates the cylindrical can bodies in a circumferential direction of the can bodies by applying vibration to a can body support portion that supports the can bodies moving along the transport path.

8. 2. The heating device according to claim 1, wherein the can body is rotated at least once by the rotating means from when the conveying means starts conveying the can body to when the conveying means finishes conveying the can body.

9. The heating device described in claim 1, wherein the rotation means rotates the can body so that all parts of a band-shaped region extending around the entire circumference of the cylindrically formed can body on its outer surface face the heating source at least once.

10. The conveying path is provided with a curvature imparting section in which a curvature is imparted to the conveying path and a traveling direction of the can body is changed, 2. The heating device according to claim 1, wherein the rotating means is provided in the curvature imparting portion.

11. The heating device according to claim 10, wherein the rotating means is provided on a side of the conveying path, on a side of a portion where the curvature imparting portion is provided, and on a side opposite to the side on which the center of curvature of the curvature imparting portion is located.

12. A can body manufacturing system comprising an image forming unit that forms an image on the outer surface of a can body, and a heating device that heats the image formed on the can body by the image forming unit, and which produces can bodies with an image formed thereon, wherein the heating device is configured to include a heating device described in any one of claims 1 to 11.

Images