JP5766465B2 - Printing machine, printing apparatus and printing method - Google Patents

Description

  The present invention relates to a printing machine, a printing apparatus, and a printing method.

  Offset printing is known as one of printing techniques. In offset printing, ink is transferred from a printing plate to a transfer roll, and then transferred from the transfer roll to a printing material. Such offset printing is also called flat printing.

  An offset printing machine in which not only a transfer roll but also a plate is formed in a roll shape is suitably used for mass printing (see Patent Document 1). In the printing machine of Patent Literature 1, ink can be transferred from the plate roll to the transfer roll at high speed.

JP 2004-111822 A

  However, the printing machine disclosed in Patent Literature 1 cannot appropriately perform printing on a substrate having a complicated shape. For example, when there is a protrusion on the printing surface side of the substrate, the transfer roll may collide with the protrusion of the substrate. Further, when the printing material has a concavo-convex shape, the printing pressure of the transfer roll on the printing material is not constant, and printing may not be performed appropriately.

  The present invention has been made in view of the above problems, and an object thereof is to provide a printing machine, a printing apparatus, and a printing method capable of appropriately performing printing on a substrate having a complicated shape.

  A printing press according to the present invention is a printing press comprising a rotatable plate roll, a rotatable transfer roll, and a transfer roll for transferring the ink transferred from the plate roll to a printing material. The transfer roll moves while rotating.

  In one embodiment, the movement of the transfer roll is performed after the ink is transferred from the transfer roll to the substrate, before the ink is transferred from the transfer roll to the substrate, and the ink is transferred to the substrate. And during any period of contact with both of the substrates.

  In one embodiment, the transfer roll pressurizes the substrate to be pressed to transfer the ink to the substrate to be printed, and the transfer roll moves so that the distance from the surface to be pressed changes.

  In one embodiment, the plate roll moves with the transfer roll.

  In a certain embodiment, the said transfer roll moves so that locations other than the lower end part of the said transfer roll may collide with the said to-be-printed material.

  In one embodiment, the transfer roll moves so that the printing pressure of the transfer roll with respect to the substrate is substantially constant during a period in which the ink is in contact with both the transfer roll and the substrate.

  In one embodiment, the printing press further includes a support member that supports the plate roll and the transfer roll, a fixing member, and a displacement member that changes a position of the support member with respect to the fixing member.

  In one embodiment, the displacement member includes at least one of a ball screw, a cylinder, a cam, and a gear.

  The printing apparatus of the present invention includes the above-described printing machine and a transport unit that transports the printing material relative to the printing machine.

  In one embodiment, the transfer roll moves according to the shape and the conveyance speed of the substrate to be conveyed conveyed by the conveyance unit.

  The printing method according to the present invention includes a step of transferring ink from a rotating plate roll to a rotating transfer roll, a step of transferring the ink from the rotating transfer roll to a substrate, and a movement of the rotating transfer roll. The process of performing.

  In one embodiment, in the step of moving the transfer roll, after the ink is transferred from the transfer roll to the substrate, before the ink is transferred from the transfer roll to the substrate, and the ink It is performed in any of the periods in which both the transfer roll and the substrate are in contact.

  According to the present invention, it is possible to appropriately perform printing on a substrate having a complicated shape.

1 shows a schematic diagram of an embodiment of a printing press according to the invention. (A)-(c) shows the schematic diagram of the printing method of this embodiment. (A)-(c) shows the schematic diagram of the printing method of this embodiment. (A)-(c) shows the schematic diagram of the printing method of this embodiment. (A)-(c) shows the schematic diagram of the printing method of this embodiment. 1 shows a schematic diagram of an embodiment of a printing device according to the invention. 1 shows a schematic diagram of an embodiment of a printing device according to the invention. Fig. 2 shows a schematic side view of an embodiment of a printing press according to the present invention. Fig. 2 shows a schematic top view of an embodiment of a printing press according to the present invention. 1 shows a schematic diagram of an embodiment of a printing press according to the invention. FIG. 11 is a schematic diagram of a ball screw and its vicinity in the printing machine shown in FIG. 10. 1 shows a schematic diagram of an embodiment of a printing press according to the invention. 1 shows a schematic diagram of an embodiment of a printing press according to the invention. (A) shows the schematic diagram of the modification of the displacement member in the printing machine shown in FIG. 13, (b) shows sectional drawing along the 14b-14b 'line of (a). 1 shows a schematic diagram of an embodiment of a printing press according to the invention. 1 is a schematic diagram of a printing apparatus according to an embodiment. 1 is a schematic diagram of a printing apparatus according to an embodiment. 1 is a schematic diagram of a printing apparatus according to an embodiment. 1 shows a schematic diagram of an embodiment of a printing press according to the invention.

  Hereinafter, an embodiment of a printing machine according to the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments.

  FIG. 1 shows a schematic diagram of an embodiment of a printing press 10 according to the present invention. The printing machine 10 according to this embodiment includes a plate roll 12 and a transfer roll 14. Each of the plate roll 12 and the transfer roll 14 is rotatable. Here, the diameters of the plate roll 12 and the transfer roll 14 are substantially equal.

  The surface of the plate roll 12 is treated with metal plating. Typically, the plate roll 12 is formed with concave grooves in a predetermined pattern. This pattern corresponds to a line, a figure, a pattern, or the like printed on the substrate S. A blanket is provided on the surface of the transfer roll 14. Typically, the blanket is formed from rubber. For example, the blanket is formed from silicone rubber.

  The printing machine 10 performs printing with both the plate roll 12 and the transfer roll 14 rotated. The ink K transferred from the rotating plate roll 12 to the transfer roll 14 moves to the lower end portion of the transfer roll 14 as the transfer roll 14 rotates. When the transfer roll 14 comes into contact with the substrate S at the lower end portion of the transfer roll 14, the ink K is transferred from the transfer roll 14 to the substrate S. In this way, the ink K is printed.

  Here, the diameters of the plate roll 12 and the transfer roll 14 are substantially equal, but the present invention is not limited to this. The diameters of the plate roll 12 and the transfer roll 14 may be different. However, the diameter of one of the plate roll 12 and the transfer roll 14 is preferably an integral multiple of the other diameter.

  The ink K may include a conductive material. For example, the ink K has a particulate conductive material and a vehicle, and the vehicle includes a resin and a solvent. Further, the ink K may contain a pigment. Alternatively, the ink K may contain a coating agent. In this case, the surface treatment of the printing material S can be performed by the printing press 10 printing the ink K.

  The ink K is supplied to the plate roll 12 by an arbitrary method. For example, the ink K may be hung from the upper part of the plate roll 12, or the ink K may be supplied from an ink reservoir (not shown). Alternatively, the ink K may be ejected from the nozzle (not shown) toward the plate roll 12. Although not shown here, a scraper is attached to the plate roll 12, and the amount of ink accumulated in the vicinity of the interface between the plate roll 12 and the scraper is detected by a sensor, whereby the ink K to the plate roll 12 is detected. The supply may be controlled.

  In the printing machine 10 of the present embodiment, the transfer roll 14 moves during rotation. For example, the transfer roll 14 moves in the vertical direction (Z direction). Although details will be described later, printing can be appropriately performed even when the shape of the substrate S is complicated by moving the transfer roll 14 during rotation. The transfer roll 14 is moved before the ink K is transferred from the transfer roll 14 to the substrate S, after the ink K is transferred from the transfer roll 14 to the substrate S, and after the ink K is transferred between the transfer roll 14 and the substrate S. It may be performed during any of the periods in contact with both.

  For example, the transfer roll 14 is moved before the ink K is transferred from the transfer roll 14 to the substrate S. Hereinafter, the printing method of this embodiment will be described with reference to FIG.

  As shown in FIG. 2A, the ink K is transferred from the rotating plate roll 12 to the rotating transfer roll 14. The substrate S is transported in the X direction. Here, the position of the printing machine 10 in the X direction is fixed, and the substrate S is transported from the −X direction to the + X direction. Note that the position of the printing material S in the X direction may be fixed, and the printing press 10 may be transported in the −X direction. In this way, the substrate S may be conveyed relative to the printing machine 10.

  Further, here, the printing material S has a flat portion having a substantially constant height and a protrusion higher than the flat portion. The protrusions are provided on the −X direction side, and the protrusions of the printing material S reach below the printing press 10 after the flat portions.

  As shown in FIG. 2B, the ink K is transferred from the transfer roll 14 to the substrate S. A predetermined pressure is applied to the printing material S by the lower end portion of the transfer roll 14 and the pressed surface positioned below the printing material S, and the ink K is transferred to the printing material S. Here, the ink K is transferred to the flat portion of the substrate S.

  Thereafter, as shown in FIG. 2C, the transfer roll 14 moves in a rotated state. Specifically, the transfer roll 14 moves upward (+ Z direction) away from the surface to be pressed. Thereby, it can avoid that the transfer roll 14 collides with the projection part of the to-be-printed object S, and can print on the to-be-printed object of a complicated shape appropriately. Here, the plate roll 12 is also moved when the transfer roll 14 is moved.

  Thereafter, the transfer roll 14 may return to the original printing position as necessary. For example, when the substrate S having the same shape as shown in FIG. 2A is conveyed next, it is preferable that the transfer roll 14 moved upward returns to the original printing position.

  In FIG. 2, the transfer roll 14 is moved after the ink K is transferred from the transfer roll 14 to the substrate S, but the present invention is not limited to this. The movement of the transfer roll 14 may be performed before the ink K is transferred from the transfer roll 14 to the printing material S. Hereinafter, the printing method of this embodiment will be described with reference to FIG.

  As shown in FIG. 3A, the ink K is transferred from the rotating plate roll 12 to the rotating transfer roll 14. Although the printing material S is conveyed in the X direction, the printing material S only needs to be conveyed relative to the printing press 10 as described above.

  The to-be-printed object S has the flat part with substantially constant height, and the projection part higher than a flat part. Here, the protrusions of the substrate S are provided on the + X direction side, and the protrusions of the substrate S reach below the printing machine 10 before the flat portion. Here, the plate roll 12 and the transfer roll 14 are positioned above. At this position, even if the printing material S is conveyed as it is, the protrusions of the printing material S are in contact with both the plate roll 12 and the transfer roll 14. do not do.

  As shown in FIG. 3B, the transfer roll 14 moves in a rotated state. Specifically, after the protruding portion of the printing material S passes below the transfer roll 14, the transfer roll 14 moves in the −Z direction so that the lower end portion thereof is lower than the protruding portion of the printing material S. If the protrusion of the substrate S does not collide with the transfer roll 14, the movement of the transfer roll 14 may be started at any time.

  Thereafter, as shown in FIG. 3C, the ink K is transferred from the rotating transfer roll 14 to the substrate S. A predetermined pressure is applied to the printing material S by the lower end of the transfer roll 14 and the pressed surface positioned below the printing material S, and the ink K is transferred. Here, the ink K is transferred to the flat portion of the substrate S.

  In this way, by moving the transfer roll 14, it is possible to avoid the transfer roll 14 from colliding with the protrusions of the printing material S, and it is possible to appropriately perform printing on the printing material having a complicated shape. If necessary, the transfer roll 14 may return to the non-printing position. For example, when the substrate S having the same shape as shown in FIG. 3A is conveyed next, it is preferable that the transfer roll 14 moved upward returns to the non-printing position.

  2 and 3, the transfer roll 14 is moved after the ink K is transferred from the transfer roll 14 to the printing material S and before the transfer, but the present invention is not limited to this. The movement of the transfer roll 14 may be performed both before the ink K is transferred from the transfer roll 14 to the printing material S and after the ink K is transferred to the printing material S. Hereinafter, the printing method of the present embodiment will be described with reference to FIG.

  As shown in FIG. 4A, the ink K is transferred from the rotating plate roll 12 to the rotating transfer roll 14. The substrate S is conveyed relative to the printing machine 10 in the + X direction. Further, here, the printing material S has a flat portion having a substantially constant height and a protrusion higher than the flat portion. The protrusions are provided on both the + X direction side and the −X direction side, and the substrate S has a concave shape. In the following description, the + X direction side protrusion is referred to as a front protrusion, and the −X direction side protrusion is referred to as a rear protrusion. Before the front protrusion of the substrate S reaches the lower side of the transfer roll 14, the plate roll 12 and the transfer roll 14 do not come into contact with the front protrusion of the substrate S even if the substrate S is conveyed as it is. Is in the position.

  As shown in FIG. 4B, the transfer roll 14 moves in a rotated state. Specifically, after the front protrusion of the printing material S passes below the transfer roll 14, the transfer roll 14 moves in the −Z direction so that the lower end of the transfer roll 14 is lower than the front protrusion of the printing material S. The ink K is transferred from the transfer roll 14 to the substrate S. If the front protrusion of the substrate S does not collide with the transfer roll 14, the movement of the transfer roll 14 may be started at any time.

  Thereafter, as shown in FIG. 4C, the transfer roll 14 moves in a rotated state. Specifically, the transfer roll 14 moves upward (+ Z direction) away from the surface to be pressed. If the rear protrusion of the substrate S does not collide with the transfer roll 14, the movement of the transfer roll 14 may be started at any time. Thereby, it can avoid that the transfer roll 14 collides with the back protrusion part of the to-be-printed object S. FIG. As described above, it is possible to appropriately perform printing on a substrate having a complicated shape. Such a printer 10 and a printing method are suitably used for printing on a rear window of a vehicle.

  For example, the rear window is made of a transparent resin. From the viewpoint of strength, for example, the rear window is formed of polycarbonate resin. The printer 10 can print fine lines formed of a transparent conductive material on the surface of the rear window. For example, clouding can be removed by using this thin wire as a heat ray. The transparent conductive material is, for example, indium tin oxide (ITO).

  In the above description, the transfer roll 14 is moved during a period in which the ink K is in one of the transfer roll 14 and the substrate S, but the present invention is not limited to this. The movement of the transfer roll 14 may be performed while the ink K is in contact with both the transfer roll 14 and the substrate S. Hereinafter, the printing method of this embodiment will be described with reference to FIG.

  As shown in FIG. 5A, the ink K is transferred from the rotating plate roll 12 to the rotating transfer roll 14. As described above, the printing material S is conveyed relative to the printing press 10 in the + X direction. Here, the printing surface of the substrate S has a curved shape.

  As shown in FIG. 5B, the ink K is transferred from the rotating transfer roll 14 to the substrate S. A predetermined pressure is applied to the printing material S by the lower end portion of the transfer roll 14 and a pressed surface positioned below the printing material S, and the ink K is transferred. Here, the ink K is transferred onto the curved surface of the substrate S. At this time, the transfer roll 14 moves in a rotated state. The transfer roll 14 moves in the vertical direction so that the printing pressure of the transfer roll 14 on the printing material S becomes substantially constant in alignment with the curved surface shape of the printing material S.

  Thereafter, as shown in FIG. 5C, the transfer of the ink K onto the printing material S by the transfer roll 14 is completed, and the printing material S is conveyed in the + X direction. Thus, even if the printing surface of the substrate S is a curved surface, printing can be performed appropriately. Such printing is also called copying printing. In FIGS. 1 to 5, the ink K is shown integrally and continuously in order to avoid overcomplicating the drawings. However, the ink K is separated into a plurality of patterns so as to form a predetermined pattern. Good.

  FIG. 6 is a schematic diagram of a printing apparatus 100 including the printing machine 10. The printing apparatus 100 includes a printing machine 10 and a conveyance unit 110 that conveys the printing material S relative to the printing machine 10. Here, the conveyance unit 110 is a conveyor, and the conveyor 110 conveys the printing material S to the printing machine 10 fixed along the X direction. The printing apparatus 100 may further include a drying device 120 that dries the ink K.

  In the printing apparatus 100, the moving speed of the transfer roll 14 is set according to the conveyance speed of the printing material S. For example, when the transfer roll 14 is moved 100 mm in the Z direction, if the transferable speed of the transfer roll 14 in the Z direction per second is 10 mm / second, this movement requires 10 seconds. For this reason, the conveyance speed of the conveyor 110 is set so that no problem occurs even if the substrate S is conveyed for 10 seconds.

  In FIG. 6, the transport unit 110 transports the substrate S, but the present invention is not limited to this. The transport unit 110 may transport the printing press 10.

  FIG. 7 is a schematic diagram of a printing apparatus 100 including the printing machine 10. The printing apparatus 100 includes a printing machine 10 and a conveyance unit 110 that conveys the printing machine 10. Here, the conveyance unit 110 is a conveyor, and the conveyor 110 conveys the printing press 10 to the substrate S that is fixedly arranged along the X direction.

  In FIGS. 6 and 7, the transport unit 110 transports either the substrate S or the printing machine 10, but the present invention is not limited to this. Each of the substrate S and the printing press 10 may be conveyed by different conveyance units 110, and the substrate S may be conveyed relative to the printing press 10.

  In the above description with reference to FIGS. 6 and 7, there is one printing machine 10 of the printing apparatus 100, but the present invention is not limited to this. The printing apparatus 100 includes a plurality of printing machines 10, and the ink K having a laminated structure may be printed on the printing material S. In the above description with reference to FIGS. 6 and 7, the printing press 10 has one plate roll 12, but the present invention is not limited to this. The printing machine 10 may include a plurality of plate rolls 12, and the ink K having a laminated structure may be printed on the printing material S.

  As described above, the plate roll 12 preferably moves together with the transfer roll 14. Hereinafter, the printing press 10 of the present embodiment will be described with reference to FIGS. 8 and 9.

  FIG. 8 shows a schematic side view of the printing machine 10, and FIG. 9 shows a schematic top view of the printing machine 10. In addition to the plate roll 12 and the transfer roll 14, the printing machine 10 includes a support member 16 that supports the plate roll 12 and the transfer roll 14, a fixed member 18, and a displacement member that changes the position of the support member 16 with respect to the fixed member 18. 20. For example, the displacement member 20 preferably includes at least one of a ball screw, a cylinder (air cylinder and hydraulic cylinder), a cam (eg, an eccentric cam), and a gear.

  The support member 16 has an upper surface and side surfaces, and a lower portion of the support member 16 is opened. The plate roll 12 and the transfer roll 14 are supported on the upper surface and / or the side surface of the support member 16, and the transfer roll 14 is attached so that the lower end portion thereof is lower than the lower end portion of the support member 16.

  The support member 16 is attached to the fixed member 18 via the displacement member 20. When the displacement member 20 does not change, the support member 16 does not move, but the support member 16 moves relative to the fixed member 18 due to the change of the displacement member 20. For example, the change of the displacement member 20 causes the support member 16 to reciprocate in the direction perpendicular to the ground (Z direction). The moving direction of the support member 16 may be defined by a direction regulating member 30 provided on the fixed member 18. The direction regulating member 30 is, for example, an LM guide (Linear Motion Guide).

  In the printing machine 10, the position of the support member 16 that supports the plate roll 12 and the transfer roll 14 is changed by the displacement member 20. For this reason, even if the to-be-printed object S is a complicated shape, it can print appropriately. For example, even if the printing material S has a concave shape, it is possible to avoid the transfer roll 14 from colliding with the surface of the printing material S that should not be printed. Further, by appropriately moving the support member 16 by the displacement member 20, even when the printing material has a complicated shape, a change in printing pressure when the transfer roll 14 prints the ink K on the printing material S is suppressed. be able to.

  For example, the displacement member 20 has the following configuration. In FIG. 10, the displacement member 20 includes a ball screw 22. The ball screw 22 has a screw shaft 22a and a nut 22b. The screw shaft 22a moves with the rotation of the nut 22b. The nut 22 b is attached to the fixing member 18, and the tip end of the screw shaft 22 a is attached to the support member 16. The support member 16 moves together with the nut 22b.

  FIG. 11 shows a schematic enlarged view of the ball screw 22 shown in FIG. 10 and the vicinity thereof. Here, a worm 23a and a worm wheel 23b are provided above the fixing member 18, and the worm wheel 23b is attached to the nut 22b by a screw 23s. The rotation of the worm 23a causes the nut 22b to rotate together with the worm wheel 23b, and accordingly, the screw shaft 22a rotates and the support member 16 attached to the screw shaft 22a moves. The worm 23a is driven using a motor (not shown). By using a servo motor as the motor, the support member 16 can be moved by a predetermined distance at a predetermined timing.

  For example, the servo motor can rotate 30,000 per minute. If the motor that drives the worm 23a rotates 20,000 per minute, the gear ratio between the worm 23a and the worm wheel 23b is 40: 1, and the feed pitch of the screw shaft 22a is 5 mm, 2500 mm per minute. Movement (about 40 mm per second) can be performed. For example, when the transfer roll 14 is moved 160 mm in the Z direction, the movement of the transfer roll 14 can be completed in about 4 seconds. For example, if the feed pitch of the screw shaft 22a is doubled, the movement time can be halved.

  The movement of the support member 16 may be performed using a cylinder, for example. In FIG. 12, the displacement member 20 includes a cylinder 24. The cylinder 24 is an air cylinder or a hydraulic cylinder. In order to suppress vibration, the cylinder 24 may include an air cushion. By using a hydraulic cylinder as the displacement member 20, the support member 16 can be moved more quickly.

  Moreover, you may perform the movement of the supporting member 16 using a cam (eccentric cam), for example. In FIG. 13, the displacement member 20 includes a cam 26a and a roller 26b. A support member 16 is attached to the lower end of the roller 26b. A biasing force is applied to the roller 26b in the + Z direction. The urging force is applied using a spring or an air cylinder. When the position of the roller 26b is changed by the rotation of the cam 26a, the position of the support member 16 is changed.

  In FIG. 13, the cam 26a and the roller 26b are provided separately, but the present invention is not limited to this. As shown in FIGS. 14 (a) and 14 (b), the roller 26b is configured to pass through a path formed by the cam 26a, and the cam 26a and the roller 26b may be provided integrally. Good.

  Alternatively, the movement of the support member 16 may be performed using a gear, for example. In FIG. 15, the displacement member 20 includes a rack gear 28a and a pinion gear 28b. The support member 16 can be moved by the rack gear 28a moving with the rotation of the pinion gear 28b. In the case of performing copying printing, the support member 16 is preferably moved using a ball screw or a cam.

  The transfer roll 14 has a shaft (not shown) extending from each of two cylindrical bottom surfaces (planes), and the transfer roll 14 may rotate together with shafts held at both ends. Alternatively, the transfer roll 14 may have a cylindrical shape, and the transfer roll 14 may rotate in a state where a core (not shown) provided with a shaft is inserted into the inner peripheral surface. The plate roll 12 may also have the same shape as the transfer roll 14. In addition, when the plate roll 12 and the transfer roll 14 each have a shaft, it is preferable that the shaft also moves together with the plate roll 12 and the transfer roll 14. Hereinafter, the printing apparatus 100 will be described with reference to FIGS. 16 and 17.

  In the printing apparatus 100, the plate roll 12 rotates around the shaft 12a, and the plate roll 14 rotates around the shaft 14a. Here, the shaft 14a rotates with the rotation of the shaft 12a. Thus, since the drive sources of the plate roll 12 and the transfer roll 14 are the same, the rotational speeds of the plate roll 12 and the transfer roll 14 can be made constant, and high-precision driving can be performed. Here, the shaft 14a rotates based on the rotation of the shaft 12a, but the shaft 12a may rotate based on the rotation of the shaft 14a. In this way, rotation may be transmitted from one shaft of the plate roll 12 and the transfer roll 14 to the other shaft.

  In the printing apparatus 100, the printing press 10 further includes spur gears 40 and 42. Both the spur gears 40 and 42 rotate around a rotation axis parallel to the Z axis. The spur gear 42 is attached to the support member 16, and the spur gear 42 is movable in the Z direction together with the support member 16. The spur gear 40 is rotated by converting the rotation of the shaft Hx with the bevel gear Bg, and the spur gear 40, the plate roll 12 and the transfer roll 14 are rotated along with this rotation.

  In the printing press 10 described above, the members are connected using a gear, but a universal joint may be used instead of the gear. However, alignment can be performed with high accuracy by using a gear.

  The shaft Hx described above may be driven together with the conveyor 110. Hereinafter, an example of the printing apparatus 100 will be described with reference to FIG. The conveyor 110 has a toothed belt 110a and a sprocket 110b. The toothed belt 110a is also called a cogged belt.

  Here, the shaft Ha is connected to the motor M, and the rotation of the motor M is transmitted to the shaft Ha. The shaft Ha is connected to the shaft Hb via the bevel gear Bg, and the shaft Hb is connected to the shaft Hx via the bevel gear Bg. For this reason, the shafts Ha, Hb, and Hx rotate with the rotation of the motor M, respectively. The shaft Hb is also called an idle shaft, and the shaft Hx is also called a conveyor shaft. Here, printing of the printing press 10 and conveyance of the conveyor 110 are driven by the motor M.

  As described above, the plate roll 12 and the transfer roll 14 rotate together with the shaft connected from the shaft Hx via the bevel gear Bg. For this reason, printing and conveyance of the printing apparatus 100 are synchronized. Further, the sprocket of the conveyor 110 rotates with the shaft Hb.

  For example, by making the ratio of the diameter of the sprocket and the diameter of the plate roll 12 an integer, the conveyance of the substrate and the printing can be easily synchronized. For example, the ratio of the sprocket diameter to the plate roll 12 diameter is 2: 1. Alternatively, this ratio may be 1: 1.

  As described above, when the conveyance and printing are synchronized mechanically, the conveyance and printing can be easily synchronized. Note that the conveyance speed and printing cycle of the substrate S can be adjusted by changing the rotation of the motor M.

  In the printing apparatus 100 with reference to FIG. 18, printing and conveyance are mechanically synchronized, but the present invention is not limited to this. Printing and transport may be synchronized using a servo system.

  In the above description, the conveyor 110 transports the printing material S at a constant speed, but the present invention is not limited to this. The speed at which the conveyor 110 conveys the printing material S may vary from time to time. For example, after the conveyor 110 transports the printing material S under the printing machine 10, the conveyor 110 stops the conveyance until the printing machine 10 completes printing on the printing material S, and the printing machine 10 transfers the printing material S to the printing material S. After completing printing, the conveyor 110 may start conveying. In this way, the conveyor 110 may intermittently convey the printing material S. However, in order to shorten the printing processing time, it is preferable that the conveyor 110 conveys the printing material S at a constant speed.

  In addition, as described above, when the printing apparatus 100 is driven by meshing of gears, if the conveyor 110 is transported at a constant speed, the gears mesh with each other at the same portion, so that the printing apparatus 100 is transported under a constant load. It can be performed. However, when changing the conveyance speed of the conveyor 110 or stopping the conveyance of the conveyor 110, since the gear load and the contact surface are not constant, it is necessary to take a relatively large amount of play, and high-precision printing is performed. It may not be possible. For this reason, also from this viewpoint, it is preferable that the conveyor 110 is transported at a constant speed.

  In the above description, the rotation of the shafts 12a and 14a is directly transmitted, but the present invention is not limited to this. As shown in FIG. 19, the transmission of the rotation of the shafts 12a and 14a may be performed via idle gears 13a and 13b, for example.

  In the above description, the plate roll 12 is moved together with the transfer roll 14, but the present invention is not limited to this. The transfer roll 14 may be separated from the plate roll 12 by moving only the transfer roll 14 without moving the plate roll 12. The transfer roll 14 is moved vertically or smoothly so that the transfer roll 14 does not collide with the plate roll 12. For example, when the ink roll K is transferred from the plate roll 12 to the transfer roll 14 and the plate roll 12 and the transfer roll 14 having substantially the same diameter are arranged at substantially the same height, the transfer roll 14 moves in the X direction and the Y direction when moved. It can be moved in the Z direction with little movement in the direction. Alternatively, the transfer roll 14 may be moved by a swing arm.

  As shown in FIG. 17, when the plate roll 12 and the transfer roll 14 are driven by a gear, if the plate roll 12 and the transfer roll 14 are separated when the transfer roll 14 is moved, the meshing of the gear is separated. It will be. After that, at the start of printing, it is necessary to move the transfer roll 14 closer to the plate roll 12 and reengage the gear. At this time, the gear may not be properly engaged. For this reason, it is preferable that the transfer roll 14 moves together with the plate roll 12.

  According to the present invention, it is possible to suitably perform printing on a substrate having a complicated shape.

DESCRIPTION OF SYMBOLS 10 Printing machine 12 Plate roll 14 Transfer roll 16 Support member 18 Fixing member 20 Displacement member 100 Printing apparatus

Claims (12)

A rotatable plate roll,
A rotary transfer roll, comprising a transfer roll for transferring the ink transferred from the plate roll to a printing material,
When the substrate has a flat portion and a protrusion protruding upward from the flat portion, and the substrate is conveyed relative to the printing machine,
After the transfer roll has transferred the ink to the substrate, the substrate is transported relative to the transfer roller in a direction in which the protrusion of the substrate approaches the transfer roller. The transfer roll is rotated and moves in a direction away from the substrate.
Or
When the printing material is conveyed relative to the transfer roll in a direction in which the protrusion of the printing material is separated from the transfer roll at a position where the transfer roll and the printing material do not contact, the transfer A printing machine in which a roll moves in a direction approaching the substrate to be printed in a rotated state, and transfers the ink to the substrate . The transfer roller is moved to the period in which the ink is in contact with both of said transfer roll and said printing object, printing machine according to claim 1. The transfer roll pressurizes the substrate to be pressed to transfer the ink to the substrate,
The printing press according to claim 1, wherein the transfer roll moves so that a distance from the pressed surface changes.   The printing press according to claim 1, wherein the plate roll moves together with the transfer roll.   5. The printing machine according to claim 1, wherein the transfer roll moves so that a portion other than a lower end portion of the transfer roll does not collide with the substrate.   6. The transfer roll according to claim 1, wherein the transfer roll moves so that a printing pressure of the transfer roll with respect to the printing material is substantially constant during a period in which the ink is in contact with both the transfer roll and the printing material. A printing machine according to any one of the above. A support member for supporting the plate roll and the transfer roll;
A fixing member;
The printing machine according to claim 1, further comprising a displacement member that changes a position of the support member with respect to the fixing member.   The printing press according to claim 7, wherein the displacement member includes at least one of a ball screw, a cylinder, a cam, and a gear. A printing machine according to any one of claims 1 to 8;
A printing apparatus comprising: a conveyance unit that conveys the substrate to be printed relative to the printing press.   The printing apparatus according to claim 9, wherein the transfer roll moves according to a shape and a conveyance speed of the printing material conveyed by the conveyance unit. Preparing a printing press comprising a rotatable plate roll and a rotatable transfer roll;
Preparing a printing material having a flat portion and a protruding portion protruding upward from the flat portion;
A step of ink, transferred to the transfer roll rotating from said plate roll rotates,
A step of the ink is transferred to the printing substrate from the transfer roll to the rotating,
And a step of moving the rotating transfer roll, the printing method comprising :
In the step of transferring to the substrate and the step of moving the rotating transfer roll,
When the substrate is conveyed relative to the printing machine,
After the transfer roll has transferred the ink to the substrate, the substrate is transported relative to the transfer roller in a direction in which the protrusion of the substrate approaches the transfer roller. The transfer roll is rotated and moves in a direction away from the substrate.
Or
When the printing material is conveyed relative to the transfer roll in a direction in which the protrusion of the printing material is separated from the transfer roll at a position where the transfer roll and the printing material do not contact, the transfer A printing method in which a roll moves in a direction approaching the substrate to be printed while being rotated, and the ink is transferred to the substrate . Step, the ink also comprises movement of the transfer roll and the period in contact with both of the substrate, printing method according to claim 11 for movement of the transfer roll.

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