JP7270805B2 - printer - Google Patents

Description

The present invention relates to printing devices.

Japanese Patent Laid-Open No. 2002-200003 discloses a printing apparatus in which inkjet printing is performed in at least one inkjet printing station, and in which a plurality of inkjet heads are arranged in the inkjet printing station.

JP 2012-232771 A

When the can body is stopped at the position where the image forming means is installed and an image is formed on the can body, if the positioning accuracy of the can body is low, the posture of the can body with respect to the image forming means will not be stable. The quality of the displayed image tends to deteriorate.
SUMMARY OF THE INVENTION An object of the present invention is to improve the positioning accuracy of a can body when the can body is stopped and an image is formed on the can body.

A printing apparatus to which the present invention is applied includes a moving body that holds and moves a cylindrical can body, and image forming means that forms an image on the moving body that has stopped at a predetermined stop position. and a contact receiving device which is installed at the stop point and arranged coaxially with the can body held by the moving body stopped at the stop point, and a part of the moving body is pressed against and comes into contact with the part. The pressed portion rotates about a rotation axis, and the portion receives a driving force from the pressed portion and rotates about the rotation axis, and the stop position is reached. When the moving body is stopped, the rotating shaft of the portion to be pressed is positioned on an extension of the rotating shaft of the portion, and one of the portion to be pressed and the portion has: The printing device is provided with a protrusion that protrudes toward the other, and the other is provided with a recess for receiving the protrusion.
Here, the projecting portion may enter the concave portion when the rotation angle of the portion with respect to the portion to be pressed reaches one predetermined rotation angle.
Further, the protrusion provided on the one side is provided at a location away from the rotation shaft of the one side, and the recessed portion provided on the other side is provided at a location off the rotation shaft of the other side. It may be provided.
Further, the protrusion provided on the one is formed to extend along the one radial direction, and the recess provided on the other is formed to extend along the other radial direction. You can make it look like
Further, the projecting portion provided on the one side is provided on the rotating shaft of the one side, and the recessed portion provided on the other side is provided on the rotating shaft of the other side. The projecting portion is formed so that the shape of the projecting portion is an isosceles triangle when viewed from the side on which the other is arranged, and the recess provided on the other is arranged on the one. The recess may be formed so that the shape of the recess when viewed from the receiving side is an isosceles triangle.
Further, the protrusion provided on one side is provided on the one rotating shaft, and the recess provided on the other side is provided on the other rotating shaft. A protrusion may be provided on the surface, and a recess for receiving the protrusion of the protrusion may be provided on the inner peripheral surface of the recess.
Further, a biasing means for biasing at least the part toward the side where the pressed portion is provided may be further provided.
Further, the biasing means may use magnetic force to bias the part toward the side where the pressed portion is provided.
Further, the pressed portion may rotate, and a driving force for rotating the can body may be transmitted to the moving body through the pressed portion and the portion.
Further, the pressed portion may be arranged coaxially with the can body and arranged on an opening side of the can body.
Further, a positioning means may be provided at the stop position for positioning the can body held by the moving body in the radial direction.
Further, the moving body may not be provided with a motor used for rotating the can held by the moving body.
From another point of view, the printing apparatus to which the present invention is applied has a moving body that holds and moves a cylindrical can body, and a moving body that stops at a predetermined stopping point. image forming means for forming an image; and an image forming means installed at the stop position, arranged coaxially with a can body held by the moving body stopped at the stop position, and pressed against a part of the moving body. a pressing part that contacts the part, wherein the pressing part rotates about a rotation axis, and the part receives a driving force from the pressing part and rotates about the rotation axis. In a state where the moving body is stopped at the stop position, the rotating shaft of the pressing portion is positioned on an extension line of the rotating shaft of the part, and the part of the moving body and the In the printing device, one of the pressing parts is provided with a projection projecting toward the other, and the other is provided with a recess into which the projection is received.
Viewed from another point of view, the printing apparatus to which the present invention is applied forms an image on a moving body that moves while holding a can body, and on the can body of the moving body that stops at a predetermined stopping point. an image forming means provided at the stop position and used for rotating the can body held by the moving body stopped at the stop position and being in contact with the moving body; and a rotating body provided at the stop position a pressing part provided separately from the rotating body and against which a part of the moving body stopped at the stopping point and/or a part of the can body held by the moving body is pressed; A printing device comprising
Here, one of the rotating body and the contact portion of the moving body that contacts the rotating body is provided with a protrusion that protrudes toward the other, and the other is provided with the protrusion. may be provided with a recess into which the
Viewed from another point of view, the printing apparatus to which the present invention is applied forms an image on a moving body that moves while holding a can body, and on the can body of the moving body that stops at a predetermined stopping point. an image forming means provided at the stop position and used for rotating the can body held by the moving body stopped at the stop position and being in contact with the moving body; and a rotating body provided at the stop position a pressing part provided separately from the rotating body and pressed against a part of the moving body stopped at the stopping point and/or a part of the can body held by the moving body; is a printing device comprising:
Here, one of the rotating body and the contact portion of the moving body that contacts the rotating body is provided with a protrusion that protrudes toward the other, and the other is provided with the protrusion. may be provided with a recess into which the

According to the present invention, it is possible to improve the positioning accuracy of the can body when the can body is stopped and an image is formed on the can body.

1 is a side view of a printing device; FIG. It is a figure explaining an inspection apparatus. FIG. 10 is a diagram showing a comparative example of a printing device; FIG. 11 is a top view showing another configuration example of the printing apparatus; It is a figure at the time of looking at an inkjet head and a moving unit from the arrow V direction of FIG. (A) and (B) are diagrams for explaining a pressed portion and a columnar member. (A) and (B) are diagrams showing other configuration examples of a pressed portion and a columnar member. (A) and (B) are diagrams showing other configuration examples of a pressed portion and a columnar member. It is the figure which showed other structural examples, such as a cylindrical member. FIG. 10 is a diagram showing a configuration example in which the pressing section is moved and pressed against the moving unit;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a side view of a printing device 500. FIG.
The printing apparatus 500 is provided with a can supply section 510 to which the cans 10 are supplied. The can bodies 10 are supplied (attached) to the support member 20 that supports the can bodies 10 in the can body supply section 510 .
Specifically, the support member 20 is formed in a cylindrical shape, and the can body 10 is supplied to the support member 20 by inserting the support member 20 into the cylindrical can body 10 .

Further, the can body supply section 510 is provided with an inspection device 92 .
The inspection device 92 inspects whether or not the can body 10 is deformed.
More specifically, the inspection device 92 is provided with a light source 92A, as shown in FIG. 2 (a diagram for explaining the inspection device 92).
The light source 92A is provided on one end side of the can body 10 and emits a laser beam that travels along the outer peripheral surface of the can body 10 and along the axial direction of the can body 10 . Furthermore, a light receiving portion 92B for receiving laser light from the light source 92A is provided on the other end side of the can body 10 .

If a part of the can body 10 is deformed as indicated by reference numeral 3A, the laser beam is blocked and the laser beam is not received by the light receiving portion 92B. Thereby, deformation of the can body 10 is detected.
In this embodiment, when the inspection device 92 determines that the can body 10 does not satisfy the predetermined condition (when it is determined that the can body 10 is deformed), the discharge mechanism 93 (See FIG. 1) discharges the can body 10 to the outside of the printing apparatus 500 .

As shown in FIG. 1, the ejection mechanism 93 is arranged between the inspection device 92 and the inkjet printing section 700 (arranged upstream of the inkjet printing section 700).
In this embodiment, the deformed can body 10 is ejected from the printing device 500 before image formation is performed by the inkjet printing unit 700 .

In the discharge mechanism 93, compressed air is supplied to the inside of the support member 20 formed in a cylindrical shape, and the can body 10 moves in the axial direction (the direction perpendicular to the plane of FIG. 1).
Further, the bottom portion of the can body 10 (the closed end portion) is sucked by a suction member (not shown). The suction member conveys the can body 10 to the outside of the printing apparatus 500 and discharges the can body 10 to the outside of the printing apparatus 500 .

An inkjet printing unit 700 is provided downstream of the ejection mechanism 93 .
The inkjet printing unit 700 uses an inkjet printing method to form an image on the can body 10 moved from the upstream side.
Here, image formation by an inkjet printing method refers to printing performed by ejecting ink from an inkjet head and adhering the ink to the can body 10 .
A known method can be used for image formation by an inkjet printing method. Specifically, for example, a piezo method, a thermal (bubble) method, a continuous method, or the like can be used.

A light irradiation unit 750 as an example of a light irradiation unit is provided downstream of the inkjet printing unit 700 .
The light irradiation unit 750 has a light source and irradiates light onto the outer peripheral surface of the can body 10 on which the image is formed by the inkjet printing unit 700 to cure the image formed on the outer peripheral surface.

In the inkjet printing unit 700, an image is formed using ultraviolet curable ink. In addition, the inkjet printing unit 700 forms an image using actinic radiation curable ink.
The light irradiation unit 750 irradiates the formed image with light such as ultraviolet rays. This cures the image formed on the outer peripheral surface of the can body 10 .
Here, the inkjet printing section 700 and the light irradiation section 750 are arranged on the side of the first linear section 810 (details will be described later).

Further, in this embodiment, a plate type printing unit 760 and a protective layer forming unit 770 are provided as an example of processing means.
The plate-type printing unit 760 is arranged downstream of the inkjet printing unit 700 in the conveying direction of the can body 10 . The protective layer forming section 770 is arranged downstream of the plate type printing section 760 in the conveying direction of the can body 10 .

The plate-type printing unit 760 forms an image on the can body 10 using a plate-type printing method.
Specifically, the plate type printing unit 760 is provided with a plurality of plate cylinders 451 . The surface of the plate cylinder 451 is provided with projections (not shown) corresponding to images to be formed by plate printing. The plate type printing unit 760 is also provided with a plurality of ink supply units 452 that supply ink to the projections of the plate cylinder 451 .
Further, the plate-type printing unit 760 is provided with a blanket 453 for transferring ink from the plate cylinder 451 and for transferring the ink to the can body 10 .

In the plate printing unit 760 , the can body 10 stops at a position facing the blanket 453 . Furthermore, the can body 10 rotates in the circumferential direction.
Also, in the plate-type printing unit 760 , ink is supplied from each of the ink supply units 452 to the surface of the corresponding plate cylinder 451 . Ink adhering to the surface of the plate cylinder 451 (ink adhering to the projections of the plate cylinder 451 ) is transferred to the blanket 453 . Further, the ink transferred to the blanket 453 is transferred to the rotating can body 10 . As a result, an image is formed on the outer peripheral surface of the can body 10 according to the plate type.

Here, image formation using a printing plate refers to image formation using a printing plate. More specifically, image formation using a plate refers to forming an image on the can body 10 by applying ink to the plate and then transferring the ink adhered to the plate to the can body 10 . .

This transfer may be performed by directly contacting the plate with the can body 10, or by placing an intermediate transfer body such as a blanket 453 between the plate and the can body 10 and transferring the image via this intermediate transfer body. , transfer to the can body 10 may be performed.
Examples of plate-type printing include letterpress printing, intaglio printing, lithographic printing, and stencil printing, and any of these may be used in plate-type printing. In addition, in this embodiment, the image formation to the can 10 is performed using letterpress printing.

The protective layer forming section 770 is arranged downstream of the plate type printing section 760 .
The protective layer forming section 770 forms a transparent layer on the image formed by the inkjet printing section 700 and on the image formed by the plate printing section 760 to cover these images. Thereby, in this embodiment, a transparent protective layer is formed as the outermost layer of the can body 10 .

Here, the protective layer forming portion 770 is provided with a contact member 771 that is formed in a cylindrical or columnar shape and contacts the outer peripheral surface of the can body 10 .
After the can body 10 is supplied to the position facing the contact member 771 , the contact member 771 moves toward the can body 10 and contacts the can body 10 . More specifically, the contact member 771 moves obliquely upward to contact the can body 10 as indicated by arrow 1A in the drawing.

In addition, the protective layer forming section 770 is provided with a paint containing section 772 for containing paint. Furthermore, a supply member 773 formed in a cylindrical or columnar shape is provided for supplying the paint in the paint container 772 to the contact member 771 .
In the protective layer forming section 770, the can body 10 rotates in the circumferential direction. Further, paint is supplied to the outer peripheral surface of the contact member 771 by a supply member 773 . Thereby, in the present embodiment, the paint adheres to the entire peripheral surface of the can body 10 in the circumferential direction.

A detachment section 780 for detaching the can body 10 from the support member 20 is provided on the downstream side of the protective layer forming section 770 . In the present embodiment, the can body 10 is removed from the support member 20 at the removing section 780 , and the can body 10 is discharged to the outside of the printing apparatus 500 .
Further, the printing apparatus 500 is provided with a plurality of moving units 550 as an example of a moving body that moves while supporting the can body 10 .

In this embodiment, the support member 20 for supporting the can body 10 is attached to the moving unit 550 , and the can body 10 moves together with the moving unit 550 .
Here, the can body 10 is formed in a cylindrical shape and provided with an opening at one end. Further, the other end of the can body 10 is closed, and the other end is provided with a bottom portion 10A. The support member 20 is inserted into the can body 10 through this opening.
Furthermore, in this embodiment, a moving mechanism 560 that functions as moving means for moving the moving unit 550 is provided. The moving mechanism 560 is provided with an annular guide member 561 that guides the moving unit 550 .

Each of the moving units 550 is guided by a guide member 561 and performs circular movement along a predetermined circular movement path 800 .
Along with this, in this embodiment, the support member 20 provided in the moving unit 550 and the can body 10 supported by the support member 20 also move along the predetermined annular movement path 800 .

The moving path 800 is arranged such that its axial center 800C extends in the horizontal direction. In other words, the movement path 800 is arranged around the axial center 800C along the horizontal direction. Here, this axial center 800C extends in a direction orthogonal to the plane of FIG.
In this case, in the present embodiment, the support member 20 and the can body 10 revolve around this axial center 800C extending along the direction perpendicular to the plane of the drawing.

The movement path 800 is provided with a first linear portion 810 that is a linear movement path and a second linear portion 820 that is also a linear movement path.
Each of the first linear portion 810 and the second linear portion 820 is arranged to extend along the horizontal direction. Also, the first linear portion 810 and the second linear portion 820 are arranged in a substantially parallel relationship. Furthermore, in this embodiment, the first linear portion 810 is arranged above the second linear portion 820 .

Further, the first straight portion 810 is provided at the top portion of the annular movement path 800, and the second straight portion 820 is provided at the bottom portion of the annular movement path 800. there is
Furthermore, in this embodiment, an inkjet printing section 700 is provided above the first linear section 810 positioned at the top.

Further, the movement path 800 is provided with a first curved portion 830 and a second curved portion 840 that have a curvature and are formed to draw an arc.
The first curved portion 830 connects the right end of the first linear portion 810 in the drawing and the right end of the second linear portion 820 in the drawing. Also, the first curved portion 830 is formed so as to extend downward from above.
The second curved portion 840 connects the left end of the first linear portion 810 in the drawing and the left end of the second linear portion 820 in the drawing. Further, the second curved portion 840 is formed so as to extend upward from below.

In this embodiment, a plate type printing unit 760 and a protective layer forming unit 770 are provided on the side of the first curved portion 830 (the portion of the movement path 800 that has a curvature).
In other words, the plate-type printing section 760 and the protective layer forming section 770 are provided on the sides of the portion of the movement path 800 that extends from the top to the bottom.
In this embodiment, the can body 10 positioned at the first curved portion 830 is printed by plate printing and the formation of the protective layer is performed.

If the plate-type printing unit 760 and the protective layer forming unit 770 are provided on the side of the first curved portion 830 (the part of the movement path 800 that goes from the top to the bottom or the part that goes from the bottom to the top), the printing apparatus 500 can be made smaller.
Specifically, the size of the printing apparatus 500 can be reduced compared to the case where these are provided above the first linear portion 810 or the like. More specifically, the size of the printing device 500 in the horizontal direction (direction indicated by arrow 1B in FIG. 1) can be reduced.
Here, when the plate-type printing portion 760 and the protective layer forming portion 770 are further provided above the first linear portion 810, it becomes necessary to extend the first linear portion 810 more than the state shown in FIG. , the size of the printing apparatus 500 is increased.

Further, in the present embodiment, the can body supply unit 510 is provided in the upper portion (the portion above the horizontal line H passing through the axis center 800C) (hereinafter referred to as the “upper portion”) of the annular movement path 800. is provided.
A detachment portion 780 is provided in the lower portion (the portion below the horizontal line H) (hereinafter referred to as the “lower portion”) of the annular movement path 800 .
As a result, compared to the case where only one of the upper portion and the lower portion is provided with both the can body supply portion 510 and the removal portion 780, in this case also, the horizontal direction (the direction indicated by the arrow 1B in FIG. 1) can be achieved. can reduce the size of the printing device 500 in

In this embodiment, the can body supply unit 510 is provided in the upper part and the removal part 780 is provided in the lower part. , a detachment portion 780 may be provided in the upper portion.
More specifically, for example, when the inkjet printing section 700 is provided in the second linear section 820 or the like, the can supply section 510 is provided in the lower portion, and the removal section 780 is provided in the upper portion. good too.

Further, in this embodiment, the case where both the plate type printing section 760 and the protective layer forming section 770 are provided on the side of the first curved section 830 has been described as an example. However, the present invention is not limited to this, and for example, the plate type printing section 760 may be provided on the side of the first curved section 830 and the protective layer forming section 770 may be provided on the side of the second curved section 840 .
In this case, the detaching portion 780 is provided at the portion indicated by reference numeral 1C (on the downstream side of the protective layer forming portion 770).

In addition, as in the present embodiment, a protective layer forming portion 770 is provided on the side of the first curved portion 830 (a portion of the movement path 800 that extends from the top to the bottom or the portion that extends from the bottom to the top). , the size of the mechanism for moving the contact member 771 can be reduced.
In this embodiment, as described above, the contact member 771 is moved to bring the contact member 771 into contact with the can body 10 .

In this case, if the contact member 771 is located below the second linear portion 820, it will be necessary to move the contact member 771 directly upward. In this case, the size of the driving source is increased, and the moving mechanism for moving the contact member 771 is likely to be increased in size.
In contrast, if the protective layer forming portion 770 is provided on the side of the first curved portion 830 as in the present embodiment, it is not necessary to move the contact member 771 directly upward.
In this case, the size of the driving source and the like can be reduced, and the size of the moving mechanism for moving the contact member 771 can be reduced. If the size of the moving mechanism can be reduced, the overall size of the printing apparatus 500 can also be reduced.

Next, the inkjet printing section 700 will be described.
The inkjet printing section 700 is arranged above the first linear section 810 and performs image formation on the can body 10 located in the first linear section 810 .
The inkjet printing unit 700 is provided with a plurality of inkjet heads 11 arranged side by side in the horizontal direction in the figure. The portion where the plurality of inkjet heads 11 are provided can be regarded as image forming means for forming an image on the can body 10 .

Specifically, the inkjet printing unit 700 includes a first inkjet head 11C that ejects cyan ink, a second inkjet head 11M that ejects magenta ink, a third inkjet head 11Y that ejects yellow ink, and a black inkjet head 11Y. A fourth inkjet head 11K for ejecting ink is provided.
In the following description, the first to fourth inkjet heads 11C to 11K are simply referred to as "inkjet heads 11" when they are not distinguished from each other.

Here, the four inkjet heads 11, ie, the first inkjet head 11C to the fourth inkjet head 11K, form an image on the can body 10 using ultraviolet curable ink. In this embodiment, the can body 10 moves in a lying state (the can body 10 moves in a state where the axial direction of the can body 10 is horizontal), and a part of the outer peripheral surface of the can body 10 is , pointing upwards in the vertical direction. In the present embodiment, ink is ejected downward from above the outer peripheral surface to form an image on the outer peripheral surface of the can body 10 .

Furthermore, in this embodiment, the four inkjet heads 11 are arranged in a row in the moving direction of the can body 10 . Moreover, each of the four inkjet heads 11 is arranged along a direction perpendicular to (crossing) the moving direction of the can body 10 .
In the present embodiment, while the can 10 passes below the four inkjet heads 11, ink is ejected from above onto the can 10, forming an image on the can 10. FIG.

More specifically, in this embodiment, the moving unit 550 stops at each installation location of the plurality of inkjet heads 11 . Each inkjet head 11 ejects ink onto the can body 10 to form an image on the can body 10 . In addition, when image formation is performed by each inkjet head 11, the can body 10 rotates in the circumferential direction.
In this embodiment, the four inkjet heads 11 are provided, but the inkjet head 11 for ejecting a special color ink such as a corporate color, or the inkjet head 11 for forming a white base layer. may be further provided.

Each moving unit 550, which is an example of a moving body, moves at a predetermined moving speed. Further, each of the moving units 550 stops at each of the can supply section 510, the discharge mechanism 93, the lower side of each inkjet head 11, the light irradiation section 750, the plate type printing section 760, the protective layer forming section 770, and the removing section 780. do.

Further, in each inkjet head 11, light irradiation section 750, plate printing section 760, protective layer forming section 770, etc., the can body 10 on the moving unit 550 rotates in the circumferential direction at a predetermined rotation speed.
Further, in the printing apparatus 500 of the present embodiment, more moving units 550 are installed than the number of can bodies 10 positioned in the printing apparatus 500 . Further, the movement unit 550 moves around the axial center 800C.

The moving mechanism 560 is provided with an annular guide member 561 that guides the moving unit 550 . An electromagnet (not shown) is provided inside the guide member 561 .
Further, a permanent magnet (not shown) is installed in the moving unit 550 .
In this embodiment, a linear mechanism is used to move the moving unit 550 .

More specifically, the printing apparatus 500 of the present embodiment is provided with a control unit (not shown) that controls energization of the electromagnets to generate a magnetic field and move each of the moving units 550. Let The control unit is configured by a program-controlled CPU (Central Processing Unit) or the like.

As shown in FIG. 1, the moving unit 550 is provided with a base portion 551 guided by a guide member 561 . A permanent magnet (not shown) is installed on the pedestal portion 551 .
In the present embodiment, the magnetic field generated by the electromagnet provided on the guide member 561 and the permanent magnet provided on the pedestal portion 551 of the moving unit 550 generate a propulsion force on the moving unit 550, and the moving unit 550 moves to the annular position. moves along the moving path 800 of the .

Further, the moving unit 550 of this embodiment is provided with a cylindrical support member 20 for supporting the can body 10 and a fixing member 553 for fixing the support member 20 to the pedestal portion 551 . The fixing member 553 is provided so as to stand up from the pedestal portion 551 .

The support member 20 of this embodiment is formed in a cylindrical shape, is inserted into the can body 10 through an opening formed in the can body 10 , and supports the can body 10 . Further, the support member 20 is arranged in a lying state (horizontal direction). Thereby, in this embodiment, the can body 10 is also laid down.
In this embodiment, when the can body 10 reaches each inkjet head 11 , ink is discharged from each inkjet head 11 to the can body 10 positioned below. Thereby, an image is formed on the outer peripheral surface of the can body 10 .

The light irradiation unit 750 is arranged downstream of the inkjet printing unit 700 and irradiates the can body 10 with ultraviolet light, which is an example of light. As a result, the image formed on the outer peripheral surface of the can body 10 (the image formed by the inkjet printing unit 700) is cured.
Note that thermosetting ink may be used to form an image on the can body 10. In this case, for example, a heat source instead of a light source is installed where the light irradiation unit 750 is provided.

In this embodiment, the moving unit 550 stops each time it reaches below each inkjet head 11 . In other words, mobile unit 550 stops at each of the predetermined stop locations.
In this embodiment, an image is formed on the outer peripheral surface of the can body 10 held by the moving unit 550 stopped at the predetermined stop position by the inkjet head 11 as an example of the image forming means. be done.

More specifically, in each of the inkjet heads 11, the ink is ejected from the inkjet head 11 while the support member 20 (the can body 10) is rotating in the circumferential direction. An image is formed on the surface.
In the present embodiment, when the support member 20 rotates 360° after ink ejection is started, ink ejection stops. As a result, an image is formed on the entire peripheral surface of the can body 10 in the circumferential direction.

In this embodiment, as shown in FIG. 1, the support member 20 is arranged along a direction perpendicular to the plane of FIG. In other words, the support member 20 is arranged to extend along the horizontal direction.
In addition, the support member 20 is arranged along a direction perpendicular to (crossing) the moving direction of the moving unit 550 .

In this case, compared to the case where the support member 20 is arranged along the moving direction of the moving unit 550, the length of the printing device 500 (the length in the direction indicated by the arrow 1B in FIG. 1) and the height of the printing device 500 are reduced. can be made smaller. Moreover, in this case, the total length of the movement route 800 along which the movement unit 550 moves can be reduced.

Further, when the support member 20 is arranged along the direction perpendicular to the movement direction of the movement unit 550, the movement direction of the movement unit 550 is greater than when the support member 20 is arranged along the movement direction of the movement unit 550. , the arrangement density of the moving units 550 can be increased.
In this case, the number of movable units 550 that can be installed in the printing apparatus 500 can be increased.

Further, in this embodiment, functional units such as an inkjet printing unit 700, a light irradiation unit 750, a plate printing unit 760, and a protective layer forming unit 770 are installed outside the movement path 800 in the radial direction.
Maintenance of each functional unit may be performed, and in this case, if each functional unit is arranged outside the movement path 800, this maintenance is easier than if it is arranged inside.

Further, in this embodiment, the inkjet head 11 is positioned above the can body 10, and ink is ejected onto the can body 10 from above.
In this case, compared to the case where the inkjet head 11 is arranged on the side of the can body 10 or below the can body 10, the influence of gravity acting on the ink droplets ejected from the inkjet head 11 can be reduced. The accuracy of the ink adhesion position on the body 10 can be improved.

Furthermore, in the present embodiment, an inkjet printing section 700 (a plurality of inkjet heads 11) is provided on the side (upper side) of the first linear section 810. As shown in FIG.
As a result, compared to the case where the inkjet printing part 700 (the plurality of inkjet heads 11) is provided on the side of the curved part (the first curved part 830 and the second curved part 840), the This makes it easier to improve the quality of the images that are displayed.

Here, when the inkjet head 11 is provided on the side of the curved portion, for example, as shown in FIG. will be different each time.
In this case, compared to the case where the postures of the inkjet heads 11 are uniform, the quality of the images formed tends to be degraded, such as misalignment between images formed by the inkjet heads 11 .

In contrast, when the inkjet printing unit 700 is provided on the side of the linear portion (the first linear portion 810) as in the present embodiment, it becomes easier to align the attitudes of the plurality of inkjet heads 11, and the ink jet heads 11 are formed. Reduces image quality deterioration.

FIG. 4 is a top view showing another configuration example of the printing apparatus 500. As shown in FIG.
Note that FIG. 4 mainly shows the inkjet printing unit 700 and largely omits illustration of components other than the inkjet printing unit 700 .
In this printing apparatus 500, the axial center 800C of the movement path 800 extends along the vertical direction. In other words, in this printing apparatus 500, each of the moving units 550 (not shown in FIG. 4) moves along an annular moving path 800 positioned on the horizontal plane.

Furthermore, in this printing apparatus 500, each of the inkjet heads 11 is provided on the side (upper side) of the first linear portion 810 in the same manner as described above.
In this configuration example as well, each of the inkjet heads 11 is provided on the side of the first linear portion 810, and in this case as well, the postures of the plurality of inkjet heads 11 are aligned and formed. You can suppress the deterioration of image quality caused by

1 illustrates the case where the axial center 800C of the movement path 800 extends in the horizontal direction, but as shown in FIG. may
In this case as well, if a plurality of inkjet heads 11 are arranged on the side (above) of the linear portion, it becomes easier to suppress misalignment between the images formed by each inkjet head 11, and thus the images are formed. Reduces image quality deterioration.

FIG. 5 is a diagram of the inkjet head 11C and the moving unit 550 viewed from the direction of arrow V in FIG. 5, illustration of the pedestal portion 551 (see FIG. 1) provided in the moving unit 550 is omitted.
Although not shown in FIG. 1, in this embodiment, as shown in FIG. 900 is provided.

A permanent magnet 901 is installed in the pressed portion 900 . Furthermore, each stop point P is provided with a servomotor M, which is a drive source for controlling the rotation of the pressed portion 900 using an encoder (not shown). Here, the drive source may be a pulse motor whose rotation is controlled by the number of pulses.
On the other hand, on the moving unit 550 side, a columnar member 559 attached to the end of the support member 20 that supports the can body 10 is provided. The columnar member 559 is made of a metal member, and the columnar member 559 of this embodiment is attracted by the permanent magnet 901 .

In this embodiment, the columnar member 559 is movable with respect to the fixing member 553, and the columnar member 559 is rotatable in the circumferential direction. Furthermore, the columnar member 559 is movable in the axial direction of the columnar member 559 .
More specifically, the columnar member 559 is arranged with a gap in the through hole 553A formed in the fixing member 553, and the columnar member 559 can be rotated in the circumferential direction and axially. It is supported by a fixing member 553 so as to be movable in any direction.

In this embodiment, when the moving unit 550 stops at each of the predetermined stopping points P, the columnar member 559 is attracted by the permanent magnet 901 provided on the pressed portion 900 .
As a result, the cylindrical member 559 is pressed against the pressed portion 900, and the support member 20 is positioned in the longitudinal direction of the support member 20. As shown in FIG. In other words, the can body 10 is positioned in the axial direction of the can body 10 .

In addition, in this embodiment, a portion of the moving unit 550 is urged toward the side where the pressed portion 900 is provided by the magnetic force, and this portion is pressed against the pressed portion 900 . be done.
In other words, in this embodiment, the support member 20 that supports the can body 10 is pressed against the pressed portion 900 via the cylindrical member 559 by magnetic force.

Thereby, in this embodiment, the can body 10 is positioned at a predetermined location below the first inkjet head 11C. More specifically, positioning of the can body 10 in the axial direction of the can body 10 is performed.
Here, the permanent magnet 901 and the like can be regarded as biasing means for biasing the portion pressed against the pressed portion 900 toward the side where the pressed portion 900 is provided.

In this embodiment, the permanent magnet 901 is provided on the pressed portion 900 side, but the permanent magnet 901 may be provided on the cylindrical member 559 side. A permanent magnet 901 may be provided.
Also, an electromagnet may be used instead of the permanent magnet 901 .

Further, the biasing of the columnar member 559 to the pressed portion 900 is not limited to the magnetic force, and may be performed by other methods.
For example, by reducing the pressure on the side where the pressed portion 900 is provided, part of the moving unit 550 may be sucked, and the cylindrical member 559 may be biased toward the pressed portion 900 .
Further, for example, the movement unit 550 and/or the can body 10 may be pressed toward the pressed portion 900 to bias the cylindrical member 559 toward the pressed portion 900 .

Furthermore, in this embodiment, the can body 10 held by the moving unit 550 is also positioned at the stop point P in the radial direction. Additionally, the positioning of the support member 20 in the radial direction of the support member 20 is also performed.
Furthermore, in the present embodiment, at the stop point P, the phase of the can body 10 (the columnar member 559 and the support member 20) with respect to the pressed portion 900, which is an example of the rotating body, is a predetermined phase.

In addition, in this embodiment, when the columnar member 559 is pressed against the pressed portion 900, the phase of the columnar member 559 with respect to the pressed portion 900 becomes a predetermined phase.
More specifically, in this embodiment, when the columnar member 559 is pressed against the pressed portion 900, the positioning of the columnar member 559 in the rotational direction (circumferential direction) of the pressed portion 900 is performed. done.

Accordingly, in the present embodiment, the phase of the columnar member 559 with respect to the portion to be pressed 900 becomes one predetermined phase.
In addition, in this embodiment, when the columnar member 559 is pressed against the pressed portion 900, the phase of the columnar member 559 with respect to the pressed portion 900 changes to another phase other than one predetermined phase. will not become

In this embodiment, when the columnar member 559 is pressed against the pressed portion 900, the position of the columnar member 559 is adjusted in each of the axial direction of the pressed portion 900 and the radial direction of the pressed portion 900. and positioning of the cylindrical member 559 is performed.
Furthermore, in the present embodiment, the rotation angle of the columnar member 559 in the circumferential direction of the pressed portion 900 is adjusted, and the phase (rotation angle) of the columnar member 559 with respect to the pressed portion 900 is determined in advance. It becomes one phase (rotation angle).

In this embodiment, when the cylindrical member 559 is positioned, the can body 10 is positioned directly below the inkjet head 11C. Further, the longitudinal direction of the inkjet head 11C and the axial direction of the can body 10 are parallel.
Further, when the cylindrical member 559 is positioned, the can body 10 is arranged at a predetermined position in the longitudinal direction of the inkjet head 11C.

6A and 6B are diagrams illustrating the pressed portion 900 and the cylindrical member 559. FIG. More specifically, FIG. 6A is a view of the pressed portion 900 viewed from the direction of arrow VIA in FIG. 5, and FIG. FIG. 11 is a view looking at member 559;

As shown in FIG. 6A, in the present embodiment, a recess 908A is provided on a circular opposing surface 908 of the pressed portion 900 that faces the columnar member 559. As shown in FIG. Furthermore, a permanent magnet 901 is installed on the facing surface 908 .
Further, as shown in FIG. 6B, a convex portion 559B that fits into the concave portion 908A is provided on a facing surface 559A of the columnar member 559 that faces the facing surface 908 of the pressed portion 900. .

The recessed portion 908A is located at a position deviated from the rotation axis (rotation center) 900C of the pressed portion 900 and is formed to extend along the radial direction of the pressed portion 900 .
The convex portion 559B is also located at a position shifted from the rotating shaft 559C of the columnar member 559 . Furthermore, the convex portion 559B is also arranged so as to extend along the radial direction of the columnar member 559 .

In this embodiment, when the rotation angle (relative rotation angle) of the columnar member 559 with respect to the pressed portion 900 becomes one predetermined rotation angle, the convex portion 559B enters the concave portion 908A. Become.
Thus, in the present embodiment, the cylindrical member 559 is pressed against the pressed portion 900 in a state where the phase of the cylindrical member 559 with respect to the pressed portion 900 is one predetermined phase. .

In this case, the can body 10 supported by the support member 20 is also arranged in one predetermined phase with respect to the pressed portion 900 .
Here, the pressed portion 900 having the concave portion 908A and the cylindrical member 559 having the convex portion 559B are regarded as phase adjusting means for adjusting the phase of the can body 10 with respect to the pressed portion 900 to a predetermined phase. be able to.

Furthermore, in the present embodiment, the cylindrical member 559 is positioned in the radial direction of the pressed portion 900 by inserting the convex portion 559B into the concave portion 908A. In other words, the can body 10 is positioned in the radial direction of the can body 10 .
Here, the pressed portion 900 having the concave portion 908A and the cylindrical member 559 having the convex portion 559B can be regarded as positioning means for positioning the can body 10 in the radial direction thereof.
Furthermore, in this embodiment, when the convex portion 559B enters the concave portion 908A, the opposing surface 908 and the opposing surface 559A abut each other. Thereby, in this embodiment, positioning of the can body 10 in the axial direction of the can body 10 is also performed.

The concave portion 908A and the convex portion 559B, as shown in FIGS. and the rotation shaft (rotation shaft 900C, rotation shaft 559C) of each of the cylindrical members 559 may be provided.
In this configuration example, the shape of the projection 559B and the recess 908A when viewed from the front is an isosceles triangle. In this configuration example, similarly to the above, when the rotation angle of the columnar member 559 with respect to the pressed portion 900 reaches one predetermined rotation angle, the protrusion 559B enters the recess 908A.

When the convex portion 559B enters the concave portion 908A, the can body 10 is positioned radially and axially in the same manner as described above.
Furthermore, the phase of the can body 10 with respect to the pressed part 900 becomes one predetermined phase.

In this embodiment, when the can body 10 (the columnar member 559) is positioned as described above, the columnar member 559 is moved to the pressed portion 900 using a magnetic force while the pressed portion 900 is rotated. bring closer.
Then, when the convex portion 559B and the concave portion 908A face each other, the convex portion 559B enters the concave portion 908A, and the above positioning is performed.
After that (after positioning), in this embodiment, ink is ejected from the inkjet head 11C while the pressed portion 900 is being rotated at a predetermined number of revolutions. Thereby, an image is formed on the outer peripheral surface of the can body 10 .

In this embodiment, the pressed portion 900 is coaxially arranged with the columnar member 559 rotated by the pressed portion 900, and when the pressed portion 900 rotates, the columnar member 559 also rotates. Thereby, the can body 10 rotates in the circumferential direction.
In addition, in this embodiment, the rotational driving force from the servomotor M is transmitted to the moving unit 550 side via the pressed portion 900 and the cylindrical member 559, and the can body 10 of the moving unit 550 moves in the circumferential direction. rotate to

More specifically, in this embodiment, the pressed portion 900 is coaxially arranged with the can body 10 held by the moving unit 550 stopped at the stop point P. As shown in FIG.
In this embodiment, when the pressed portion 900 rotates, the rotational driving force from the pressed portion 900 is transmitted to the can body 10 via the columnar member 559 and the support member 20, and the can body 10 rotates. Rotate in the circumferential direction.

More specifically, as shown in FIG. 5, the pressed portion 900 of the present embodiment is arranged coaxially with the can body 10 and further arranged on the side of the opening 10A of the can body 10 .
In this embodiment, when the pressed portion 900 rotates, the support member 20 inserted into the can body 10 through the opening 10A rotates, and the can body 10 rotates in the circumferential direction.

8A and 8B are diagrams showing other configuration examples of the pressed portion 900 and the cylindrical member 559. FIG.
In this configuration example, as shown in FIGS. 8A and 8B, a convex portion 559B that protrudes in the radial direction of the cylindrical member 559 is provided, and furthermore, a convex portion 559B that protrudes in the radial direction of the pressed portion 900 is provided. A concave portion 908A is provided.

More specifically, in the configuration example shown in FIGS. 8A and 8B, a columnar protrusion 559X is provided that protrudes in the axial direction from the facing surface 559A of the columnar member 559, and the protrusion 559B is , protrudes from the outer peripheral surface of the protruding portion 559X.
Further, on the pressed portion 900 side, a recessed portion 908X having a circular cross section and recessed in the axial direction of the pressed portion 900 is provided, and the recessed portion 908A is provided on the inner peripheral surface of the recessed portion 908X.

In this configuration example, the can body 10 is positioned in the axial direction by abutting the opposing surface 908 of the pressed portion 900 and the opposing surface 559A of the columnar member 559 in the same manner as described above.
Further, the cylindrical projecting portion 559X of the cylindrical member 559 enters the circular concave portion 908X of the pressed portion 900, thereby positioning the can body 10 in the radial direction.
Further, when the convex portion 559B of the cylindrical member 559 enters the concave portion 908A of the pressed portion 900, the phase of the can body 10 with respect to the pressed portion 900 becomes one predetermined phase.

In the above description, recesses such as the recesses 908A and 908X are provided on the pressed portion 900 side, and protrusions such as the protrusions 559B and 559X are provided on the cylindrical member 559 side. A convex portion may be provided on the portion 900 side, and a concave portion may be provided on the cylindrical member 559 side.

Referring again to FIG. 5, the retraction mechanism 789 will be described.
In this embodiment, as shown in FIG. 5, a retraction mechanism 789 is provided for retracting the columnar member 559 from the pressed portion 900 .
When the processing at the stop point P is completed, the retraction mechanism 789 is driven according to a signal from the control section. As a result, the columnar member 559 is retracted from the portion 900 to be pressed, and the columnar member 559 is separated from the portion 900 to be pressed. This allows further movement of the movement unit 550 downstream.

The retracting mechanism 789 is provided with a moving member 781 that moves along the axial direction of the pressed portion 900 and presses the cylindrical member 559 . A moving mechanism (not shown) is provided to move the moving member 781 toward the cylindrical member 559 .
In addition, this moving mechanism is configured using a known mechanism. Specifically, the moving mechanism is provided with a driving source such as a motor, an air cylinder, or a solenoid, and the moving member 781 is moved by using the driving force generated by the driving source.

In the printing apparatus 500 of the present embodiment, the posture of the moving unit 550 when the moving unit 550 is stopped tends to differ for each moving unit 550 .
In particular, in a configuration in which the moving units 550 move individually as in this embodiment, the postures of the moving units 550 are likely to differ. In this case, the quality of the image formed on the can body 10 is difficult to stabilize.

In contrast, in the configuration of the present embodiment, each moving unit 550 is pressed against the pressed portion 900, which is a common member, and it is difficult for each moving unit 550 to have a different posture. Become.
This stabilizes the quality of the image formed on each can body 10 .

Further, in the present embodiment, the motor for rotating the cylindrical member 559 (can body 10) is not provided in the moving unit 550, and a servomotor M provided on the main body side of the printing device 500 rotates the cylindrical member 559 (can body 10). The columnar member 559 rotates.
This reduces the weight of the moving unit 550 and reduces the shaking of the printing apparatus 500 caused by the movement of the moving unit 550 .

Here, if the moving unit 550 is provided with a motor for rotating the can body 10 and the weight of the moving unit 550 is large, the printing apparatus 500 tends to shake greatly when the moving unit 550 stops. In this case, the inkjet head 11 or the like shakes, which tends to cause deterioration in image quality.
In contrast, in the configuration in which the motor is provided on the main body side of the printing apparatus 500 as in the present embodiment, the weight of the moving unit 550 is reduced, and the shaking of the printing apparatus 500 when the moving unit 550 is stopped is reduced. become smaller.

In the present embodiment, each ink jet head 11 or the like may start printing when the rotation angle of the servo motor M reaches a predetermined angle. Alignment can be performed more easily.
More specifically, in this embodiment, as described above, the can body 10 is rotated at one predetermined angle with respect to the portion 900 to be pressed at each stop point P. 10 are placed.

Therefore, when the rotation angle (phase) of the pressed portion 900 is a predetermined rotation angle (when the rotation angle of the servo motor M is a predetermined rotation angle), the can body 10 to be printed is are arranged at a predetermined rotation angle.
In this case, as described above, if printing is started when the rotation angle of the servo motor M reaches a predetermined angle, the images formed for each color can be aligned naturally. will be done.

FIG. 9 is a diagram showing another configuration example of the columnar member 559 and the like. Members having functions similar to those described above are denoted by the same reference numerals, and descriptions thereof are omitted.
In this configuration example shown in FIG. 9, a rotating member 988 having a permanent magnet 901 and a recess 908A is provided. This rotating member 988 is rotated by the servomotor M in the same manner as described above. In this configuration example, the rotary member 988 sucks the columnar member 559 having the convex portion 559B.

Further, in this configuration example, a positioning member 989 functioning as a pressed portion is provided closer to the cylindrical member 559 than the rotating member 988 . In this embodiment, part of the cylindrical member 559 attracted by the rotating member 988 is pressed against the positioning member 989 .
More specifically, an annular protrusion 559D is provided on the outer peripheral surface of the cylindrical member 559, and this protrusion 559D is pressed against the positioning member 989. As shown in FIG.

In this configuration example, the positioning of the columnar member 559 in the radial direction and the positioning of the columnar member 559 in the circumferential direction (adjustment of the phase of the columnar member 559) are performed by the concave portion 908A provided in the rotating member 988 in the same manner as described above. , and a projection 559B provided on the columnar member 559 .
Further, in this configuration example, the positioning of the columnar member 559 in the axial direction is performed by the projecting portion 559</b>D of the columnar member 559 abutting against the positioning member 989 .

In the above description, the cylindrical member 559 is biased in the axial direction of the can body 10, but the cylindrical member 559 and the support member 20 are biased in the radial direction of the can body 10. Alternatively, these members may be pressed against the pressed portion 900 .
In the above description, a part of the moving unit 550 is pressed against the pressed part 900 , but a part of the can body 10 may be pressed against the pressed part 900 . Also, both the moving unit 550 and the can body 10 may be pressed against the pressed portion 900 .

Furthermore, in the above description, a portion of the moving unit 550 is moved with respect to the pressed portion 900 in a stationary state. Alternatively, the can body 10 may be positioned by pressing against the can body 10 .

FIG. 10 is a diagram showing a configuration example in which the pressing section 992 is moved to press the pressing section 992 against the moving unit 550 . Parts having functions similar to those described above are denoted by the same reference numerals.
In this configuration example, for example, after the moving unit 550 is stopped below the inkjet head 11 , the pressed portion 992 in a rotated state is advanced toward the cylindrical member 559 .

More specifically, the pressing portion 992 that maintains a predetermined posture is advanced toward the cylindrical member 559 . Then, when the amount of advancement of the pressing portion 992 reaches a predetermined amount of advancement, the pressing portion 992 is stopped.
As a result, in this case as well, the cylindrical member 559 is pressed against the pressing portion 992, and the can body 10 is positioned in the same manner as described above.

More specifically, in this configuration example, the moving unit 550 is provided with a biasing member 108 such as a spring member, and the cylindrical member 559 is biased toward the pressing portion 992 side.
When the pressing portion 992 advances toward the cylindrical member 559 , the pressing member 108 biases the cylindrical member 559 against the pressing portion 992 .

When the columnar member 559 contacts the pressing portion 992 , the projection 559B of the columnar member 559 enters the concave portion 908A of the pressing portion 992 also in this configuration example. Also, the opposing surface 992A of the pressing portion 992 and the opposing surface 559A of the cylindrical member 559 abut against each other.
Thus, in this configuration example as well, positioning of the can body 10 in the axial direction, positioning of the can body 10 in the radial direction, and positioning of the can body 10 in the circumferential direction are performed in the same manner as described above.

[others]
In the above description, the moving unit 550 is moved using a so-called linear motion, but the movement of the moving unit 550 is not limited to linear motion. It may be performed by circularly moving an endless member.
Further, for example, each of the moving units 550 may be provided with a drive source such as a motor for moving the moving units 550 so that the moving units 550 move autonomously.

Further, in the above description, the case where the pressed portion 900 and the pressed portion 992 are provided in the inkjet printing portion 700 has been described. is provided.
Specifically, they are also provided in the can supply section 510, the light irradiation section 750, the plate type printing section 760, the protective layer forming section 770, and the like.
In each of the can body supply unit 510, the light irradiation unit 750, the plate type printing unit 760, and the protective layer forming unit 770, the can body 10 is positioned in the same manner as described above. A driving force is supplied to the can body 10 from the portion 992 .

DESCRIPTION OF SYMBOLS 10... Can body 10A... Opening part 11... Inkjet head 20... Support member 500... Printing apparatus 510... Can body supply part 550... Moving unit 559... Cylindrical member 559B... Convex part 750... Light irradiation section 760 Plate type printing section 770 Protective layer forming section 780 Removal section 800 Movement path 800C Center of axis 810 First linear section 900 Pressed section 901 Permanent Magnet, 908A... Recessed portion, 992... Pressing portion, P... Stopping point

Claims (17)

a moving body that holds and moves a cylindrical can;
an image forming means for forming an image on the can body of the moving body stopped at a predetermined stopping point;
and a pressed portion that is installed at the stop point, is arranged coaxially with the can body held by the moving body that has stopped at the stop point, and is pressed against a part of the moving body that contacts the part. ,
with
The portion to be pressed rotates about a rotation axis, the portion receives a driving force from the portion to be pressed and rotates about the rotation axis,
in a state in which the moving body is stopped at the stop position, the rotating shaft of the pressed portion is positioned on an extension line of the rotating shaft of the part;
One of the pressed portion and the portion is provided with a protrusion projecting toward the other, and the other is provided with a recess into which the protrusion is received.
printer. 2. The printing apparatus according to claim 1, wherein the protruding portion enters the concave portion when the rotation angle of the portion with respect to the portion to be pressed becomes one predetermined rotation angle. The protruding portion provided on the one side is provided at a location away from the rotating shaft of the one side, and the recessed portion provided on the other side is provided at a location off the rotating shaft of the other side. 2. The printing device of claim 1. The protrusion provided on the one is formed to extend along the one radial direction, and the recess provided on the other is formed to extend along the other radial direction. 4. A printing device according to claim 3. The protrusion provided on the one is provided on the one rotating shaft, and the recess provided on the other is provided on the other rotating shaft,
The projecting portion is formed so that the shape of the projecting portion when the projecting portion provided on the one is viewed from the side on which the other is arranged is an isosceles triangle,
2. The printing apparatus according to claim 1, wherein the recess provided in the other is formed so that the shape of the recess is an isosceles triangle when viewed from the side on which the one is arranged. The protrusion provided on the one is provided on the one rotating shaft, and the recess provided on the other is provided on the other rotating shaft,
A protrusion is provided on the outer peripheral surface of the protrusion,
2. The printing apparatus according to claim 1, wherein a recess is provided on the inner peripheral surface of the recess for receiving the projection of the projecting portion. 2. The printing apparatus according to claim 1, further comprising biasing means for biasing at least the portion toward the side on which the portion to be pressed is provided. 8. The printing apparatus according to claim 7, wherein the biasing means uses magnetic force to bias the part toward the side where the pressed portion is provided. 2. The printing apparatus according to claim 1, wherein said portion to be pressed rotates, and a driving force for rotating said can body is transmitted to said movable body through said portion to be pressed and said portion. 2. The printing apparatus according to claim 1, wherein said pressed portion is arranged coaxially with said can body and arranged on an opening side of said can body. 2. The printing apparatus according to claim 1, further comprising positioning means for radially positioning the can body held by the movable body, the positioning means being provided at the stop position. 2. The printing apparatus according to claim 1, wherein the moving body is not provided with a motor used for rotating the can held by the moving body. a moving body that holds and moves a cylindrical can;
an image forming means for forming an image on the can body of the moving body stopped at a predetermined stopping point;
A pressing part that is installed at the stop point, is arranged coaxially with the can body held by the moving body that has stopped at the stop point, and is pressed against and contacts a part of the moving body. and,
with
The pressing portion rotates about a rotation axis, and the portion receives a driving force from the pressing portion and rotates about the rotation axis,
When the moving body is stopped at the stop position, the rotating shaft of the pressing portion is positioned on an extension line of the rotating shaft of the part, and
One of the portion of the moving body and the pressing portion is provided with a protrusion projecting toward the other, and the other is provided with a recess into which the protrusion is received.
printer. a moving body that holds and moves the can body;
an image forming means for forming an image on the can body of the moving body stopped at a predetermined stopping point;
a rotating body provided at the stopping point and used for rotating the can body held by the moving body stopped at the stopping point and in contact with the moving body;
provided at the stop location, separately from the rotating body and separately from the image forming means , and held by a part of the moving body stopped at the stopping location and/or by the moving body a pressed portion against which a portion of the can body is pressed;
a printing device. a moving body that holds and moves the can body;
an image forming means for forming an image on the can body of the moving body stopped at a predetermined stopping point;
a rotating body provided at the stopping point and used for rotating the can body held by the moving body stopped at the stopping point and in contact with the moving body;
provided at the stop point and separately from the rotating body, against which a part of the moving body stopped at the stopping point and/or a part of the can body held by the moving body is pressed; a pressing portion;
with
One of the rotating body and the contact portion of the moving body that contacts the rotating body is provided with a protrusion projecting toward the other, and the other is provided with a recess for receiving the protrusion. A printing device provided with a moving body that holds and moves the can body;
an image forming means for forming an image on the can body of the moving body stopped at a predetermined stopping point;
a rotating body provided at the stopping point and used for rotating the can body held by the moving body stopped at the stopping point and in contact with the moving body;
provided at the stop location, separately from the rotating body and separately from the image forming means , and held by a part of the moving body stopped at the stopping location and/or by the moving body a pressing portion that is pressed against a part of the can body that is in the
a printing device. a moving body that holds and moves the can body;
an image forming means for forming an image on the can body of the moving body stopped at a predetermined stopping point;
a rotating body provided at the stopping point and used for rotating the can body held by the moving body stopped at the stopping point and in contact with the moving body;
Provided at the stop point and separately from the rotating body, it presses against a part of the moving body stopped at the stop point and/or a part of the can body held by the moving body. a pressing portion to be
with
One of the rotating body and the contact portion of the moving body that contacts the rotating body is provided with a protrusion projecting toward the other, and the other is provided with a recess for receiving the protrusion. A printing device provided with

Images