JP2008213181A - Recording medium conveying device and printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress contact of a recording medium with peripheral units. <P>SOLUTION: A recording medium conveying device 3M is disposed between a printing part and a feeding part which a printing machine is equipped with. The device 3M is equipped with a swing gripper 20 and a recording medium transfer cylinder 26. A printing sheet S conveyed from the feeding part is gripped by the swing gripper 20 and transferred to the recording medium transfer cylinder 26. The swing gripper completing transfer of the printing sheet S returns to the feeding part side so as to receive another printing sheet S, and in this process, air A is blown out toward the transfer cylinder 26 from a nozzle 30 attached to the fore end part of the swing gripper 20. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portion that is disposed between a paper feeding unit and a printing unit of a printing press and delivers a recording medium from the paper feeding unit to the printing unit.

  In a sheet-fed printing press, a recording medium (for example, paper) to be used for printing is transported from a paper feeding unit to a printing unit. An apparatus for conveying a recording medium is provided. As an apparatus for transporting such a recording medium, for example, in Patent Document 1, the recording medium is transported from a paper feeding section to a swing claw provided at a tip portion of a member called a swing that can rotate around a predetermined axis. An apparatus is disclosed that grips a recording medium and transfers it to a paper feed cylinder disposed between a swing and a printing unit.

Japanese Patent Laid-Open No. 9-024602, paragraph numbers 0035 to 0055, FIGS. 1 to 4

  In the apparatus disclosed in Patent Document 1, after the swing delivers the recording medium to the paper feeding cylinder, the swing is moved to the receiving position of the recording medium in order to grip the recording medium delivered to the paper feeding cylinder. Return. At this time, the recording medium conveyed to the printing unit by the paper feed cylinder may come into contact with the swing claw or the like, and the recording medium may be damaged, or dirt such as paper dust or ink may adhere to the swing claw. There is.

  The present invention has been made in view of the above, and an object of the present invention is to provide a recording medium conveyance device and a printing press that can suppress contact between a recording medium and peripheral devices thereof.

  In order to solve the above-described problems and achieve the object, a recording medium transporting apparatus according to the present invention is disposed between a printing unit and a paper feeding unit included in a printing press, and the printing from the paper feeding unit is performed. In a recording medium transport device that delivers a recording medium to a section, around a support shaft that is orthogonal to the transport direction of the recording medium and is disposed in parallel with the recording medium in a transported state. The recording medium holding means for rotating and gripping the recording medium transported from the paper feeding unit and delivering the recording medium to a recording medium delivery cylinder for transporting the recording medium to the printing unit. A recording medium conveying arm; and gas blowing means for blowing gas toward the recording medium delivery cylinder.

  In this recording medium conveyance device, the gas blowing means for blowing gas from the recording medium conveyance arm side toward the recording medium delivery cylinder applies a pressing force toward the recording medium delivery cylinder to the recording medium. The contact between the recording medium and its peripheral devices can be suppressed. Further, since the gas blowing can apply a pressing force to the recording medium at a pressure larger than the atmospheric pressure, even a recording medium having a large thickness or a recording medium having a high rigidity can be ensured. Contact between the recording medium and its peripheral devices can be suppressed. Here, the term “orthogonal” includes not only perfect orthogonality but also orthogonality within a range of tolerance, error, and variation.

  As a desirable mode of the present invention, in the recording medium transport apparatus, the gas blowing means is preferably provided on a side to which the recording medium gripping means of the recording medium transport arm is attached. In this way, by providing the gas blowing means on the recording medium conveying arm, the gas can be blown out toward the recording medium along with the movement of the recording medium conveying arm. Can be avoided more reliably.

  As a desirable mode of the present invention, in the recording medium conveying apparatus, it is preferable that the gas blowing means is attached to a frame of the printing machine and blows out gas toward the recording medium delivery cylinder. As described above, by attaching the gas blowing means to the frame of the printing press that is a stationary system, the gas blowing means can be attached more easily than when the gas blowing means is attached to the recording medium conveying arm with movement.

  As a desirable mode of the present invention, in the recording medium transporting apparatus, the recording medium transporting arm transfers the recording medium to the recording medium delivery cylinder in the blowing direction of the gas blowing means by the gas blowing means. The direction may be a direction in which the recording medium is returned to the paper feeding unit after delivery, or a direction in which the recording medium conveyance arm rotates in order to deliver the recording medium to the recording medium delivery cylinder.

  As a desirable mode of the present invention, in the recording medium conveying apparatus, it is preferable that the gas blowing means can rotate around an axis parallel to the support shaft to change the gas blowing direction. In this way, the gas blowing direction can be changed according to the printing conditions such as the thickness of the recording medium and the temperature during printing, so when the contact between the recording medium and its peripheral devices is suppressed. In addition, stability against disturbance can be improved.

  In a preferred aspect of the present invention, in the recording medium transporting apparatus, at least the recording medium transporting arm passes the recording medium to the recording medium delivery cylinder and then returns to the paper feeding unit. It is preferable to blow out the gas. In this way, since it is not necessary to blow out the gas at all times, the energy for driving the means for supplying the gas can be suppressed.

  As a desirable aspect of the present invention, in the recording medium conveying apparatus, it is preferable to change the gas blowing condition based on the printing condition of the printing press. In this way, the gas blowing conditions such as the gas pressure, flow rate, temperature, and blowing direction can be changed according to the printing conditions such as the thickness of the recording medium and the temperature during printing. When the contact with the peripheral device is suppressed, stability against disturbance can be improved.

  As a desirable aspect of the present invention, in the recording medium transport apparatus, the recording medium delivery cylinder is the recording medium transported by the recording medium transport arm by a recording medium gripping means provided on an outer peripheral portion. It is preferable to include a recording medium suction unit that receives the medium and sucks the recording medium to the surface. In this way, not only the blowing of gas but also the suction force can be used, so that the contact between the recording medium and its peripheral devices can be avoided more reliably.

  As a desirable aspect of the present invention, in the recording medium transporting apparatus, it is preferable to change conditions for sucking the recording medium to the surface based on printing conditions of the printing press. In this way, the suction conditions such as the suction pressure can be changed according to the printing conditions such as the thickness of the recording medium and the temperature during printing, so that the contact between the recording medium and its peripheral devices is suppressed. In doing so, stability against disturbance can be improved.

  In order to solve the above-described problems and achieve the object, a recording medium transporting apparatus according to the present invention is disposed between a printing unit and a paper feeding unit provided in a printing press, and the printing is performed from the paper feeding unit. In the recording medium feeding section that delivers the recording medium to the unit, the recording medium transported from the paper feeding section is gripped by the recording medium gripping means provided at the tip, and the recording medium is transported A recording medium transport arm that rotates around a support shaft that is orthogonal to the direction and is disposed in parallel with the recording medium in a transported state; and a recording medium gripping means provided on the outer periphery And a recording medium delivery cylinder for receiving the recording medium conveyed by the recording medium conveying arm and sucking the recording medium to the surface and conveying the recording medium to the printing unit. To do.

  In this recording medium transporting apparatus, the recording medium delivery cylinder sucks the recording medium, so that contact between the recording medium and its peripheral devices can be suppressed.

  As a desirable aspect of the present invention, in the recording medium transport apparatus, the recording medium delivery cylinder is configured such that at least the recording medium transport arm delivers the recording medium to the recording medium delivery cylinder, It is preferable that the recording medium is sucked to the surface while returning to the paper feeding unit. In this way, the recording medium delivery cylinder does not always have to generate a suction force, so that energy for driving the means for generating the suction force can be suppressed.

  As a desirable aspect of the present invention, in the recording medium transporting apparatus, it is preferable to change conditions for sucking the recording medium to the surface based on printing conditions of the printing press. In this way, the suction conditions such as the suction pressure can be changed according to the printing conditions such as the thickness of the recording medium and the temperature during printing, so that the contact between the recording medium and its peripheral devices is suppressed. In doing so, stability against disturbance can be improved.

  In order to solve the above-described problems and achieve the object, a printing machine according to the present invention includes a printing unit that prints a line image on a recording medium, and a supply unit that supplies the recording medium to be printed to the printing unit. A paper unit; and a recording medium transporting device that is disposed between the paper feeding unit and the printing unit and transports the recording medium transported from the paper feeding unit to the printing unit. It is characterized by that.

  Since the printing press includes the recording medium transport device, contact between the recording medium and its peripheral devices can be suppressed.

  The recording medium conveyance device and the printing press according to the present invention can suppress contact between the recording medium and its peripheral devices.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited by the best mode for carrying out the invention (hereinafter referred to as an embodiment). In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. The present invention is directed to a sheet-fed printing press. In the following, an offset type sheet-fed printing press will be described as an example, but the printing method of the printing press to which the present invention can be applied is not limited to this. For example, the printing method may be such that printing is performed directly from the plate to the recording medium without using a blanket, such as flexographic printing or gravure printing. In the following, expressions such as a paper feed unit and a paper feed unit are not limited to paper, but are used as concepts including general recording media.

(Embodiment 1)
In the first embodiment, a recording medium transport device that transfers a recording medium from a paper feeding unit to a printing unit includes a recording medium gripping unit that grips a recording medium transported from the paper feeding unit. And a recording medium delivery cylinder for receiving the recording medium conveyed by the recording medium conveying arm by the recording medium gripping means provided on the outer peripheral portion and conveying the recording medium to the printing section, and gas toward the recording medium delivery cylinder There is a feature in that it is provided with gas blowing means for blowing out the gas.

  FIG. 1 is an overall schematic diagram of a printing press configured by combining the printing presses according to the first embodiment. A printing press 100 shown in FIG. 1 includes a printing unit 1 according to the present embodiment for each color to be printed. In printing, since normally four colors K (Black), C (Cyan), M (Magenta), and Y (Yellow) are used, the printing press 100 is for K (black), C (indigo), Y ( A total of four printing units 1 are provided for yellow) and M (red). Specifically, as shown in FIG. 1, a printing unit 1 is installed for each of K, C, M, and Y as ink colors along a conveyance path of a printing sheet (for example, paper) S that is a printing medium. Configured.

  The printing unit 1 according to the present embodiment transfers an image line image (image line image by ink) formed by ink adhering to an image line portion formed on a plate to a printing sheet S via a blanket. This is an offset printing machine that prints a line image on the surface of the printing sheet S. A printing unit 1 shown in FIG. 1 is provided with a printing unit on one side of a printing sheet S that is a recording medium and printing on one side of the printing sheet S. However, printing is performed by providing printing units on both sides of the printing sheet S. You may comprise so that it can print on both surfaces of the sheet | seat S. FIG. The printing press 100 includes a printing press drive motor 101 to drive each printing unit 1.

  The printing machine 100 includes a paper feeding unit 2 that feeds and feeds printing sheets S for printing one by one, a printing unit 4 that prints on the printing sheet S conveyed along the traveling direction Y of the printing sheet S, A paper discharge unit 5 that discharges the printed print sheet S. The paper feed unit 2 includes a paper feed tray 6 and a paper feed mechanism 7. The paper feed tray 6 stacks and places the print sheets S, and the paper feed mechanism 7 picks up the print sheets S stacked on the paper feed tray 6 one by one in order from the top. It is supplied and includes a separator (paper suction), a cam, a swing gripper, and the like. The paper feed tray 6 is controlled to move upward in the vertical direction corresponding to the supply of the print sheet S so that the paper feed mechanism maintains a substantially constant positional relationship with the print sheet S.

  The printing unit 100 prints different colors and realizes color printing so that the printing machine 100 can be used for K (black), C (indigo), Y (yellow), and M (red). Four printing units 1 are provided. The printing unit 1 is provided along the traveling direction Y of the printing sheet S for each color to be printed. Each printing unit 1 includes a plate cylinder 8, a blanket cylinder 9, and an impression cylinder 10. The plate cylinder 8, the blanket cylinder 9, and the impression cylinder 10 are arranged so as to contact each other in this order from the upper side to the lower side in the vertical direction. The plate cylinder 8, the blanket cylinder 9, and the impression cylinder 10 are each formed in a cylindrical shape, and are provided so that the rotation axis thereof intersects the traveling direction Y horizontally. The plate cylinder 8, the blanket cylinder 9, and the impression cylinder 10 are provided so as to be rotatable about a rotation axis.

  The plate cylinder 8 is mounted with a printing plate for forming a printed image on the peripheral surface. The blanket cylinder 9 is mounted with a blanket formed of an elastic material on the peripheral surface. The ink supplied to the printing plate provided in the plate cylinder 8 to form a line image is transferred to the blanket, and the blanket cylinder 9 transfers the line image to the printing sheet S. The impression cylinder 10 applies a predetermined printing pressure to the printing sheet S in cooperation with the blanket cylinder 9. The diameter of the impression cylinder 10 is twice the diameter of the plate cylinder 8 and the blanket cylinder 9. Thus, the impression cylinder 10 is configured as a so-called double cylinder with respect to the plate cylinder 8 and the blanket cylinder 9.

  Each printing unit 1 further includes an intermediate cylinder 11. The intermediate cylinder 11 is arranged on the upstream side of the impression cylinder 10 with respect to the traveling direction Y of the printing sheet S so as to be in contact with the impression cylinder 10. Similar to the plate cylinder 8, the blanket cylinder 9, and the impression cylinder 10, the intermediate cylinder 11 is formed in a cylindrical shape and is provided so that the rotation axis thereof intersects the traveling direction Y horizontally. It is provided rotatably. The intermediate cylinder 11 conveys the printing sheet S between the printing units 1 that print different colors. The diameter of the intermediate cylinder 11 is twice the diameter of the plate cylinder 8 and the blanket cylinder 9, as with the impression cylinder 10. Thus, the intermediate cylinder 11 is also configured as a so-called double cylinder with respect to the plate cylinder 8 and the blanket cylinder 9.

  Each printing unit 1 is arranged such that each intermediate cylinder 11 is in contact with the impression cylinder 10 of the printing unit 1 adjacent to the upstream side in the traveling direction Y of the printing sheet S. Note that only the printing unit 1 located on the most upstream side with respect to the traveling direction Y does not have the intermediate cylinder 11, and the impression cylinder 10 is directly adjacent to the paper feeding unit 2. The printing sheet S supplied from the paper supply unit 2 is first supplied between the blanket cylinder 9 and the impression cylinder 10 of the printing unit 1 located on the most upstream side, and then the middle of the downstream printing unit 1. By being transferred from the cylinder 11 to the impression cylinder 10, it is conveyed through each printing unit 1, and ink is transferred one after another in the process.

  The paper discharge unit 5 conveys the print sheets S printed by the printing unit 4 and stacks them in an aligned state. The paper discharge unit 5 includes a chain gripper 12 that conveys the print sheet S, a paper discharge base 13 on which the printed print sheets S are stacked, a fan device 14 that forms a downward airflow in the vicinity of the paper discharge base 13, and paper A pad 16, a vacuum suction wheel device 17, a rear paper aligning device 18, and a width direction paper aligning device 19 are provided.

  The chain gripper 12 is a pair of endless chains 12c that circulate between the adjacent position of the impression cylinder 10 of the printing unit 1 disposed on the most downstream side with respect to the traveling direction Y of the print sheet S and the upper position of the paper discharge tray 13. And a gripper bar connecting the gaps, and a gripper (claw device) 12g installed on the gripper bar at a predetermined interval. The chain gripper 12 receives the print sheet S from the impression cylinder 10 of the printing unit 1 disposed on the most downstream side with respect to the traveling direction Y of the print sheet S and conveys the print sheet S to a predetermined position above the paper discharge tray 13.

  The paper discharge table 13 is suspended from a chain and configured to be movable in the vertical direction. The paper discharge tray 13 stacks and places the print sheets S discharged from the chain gripper 12. When the height of the top surface of the uppermost stage rises as the printing sheets S are stacked, the paper discharge tray 13 is continuously or stepwise so that the falling distance of the printing sheets S is substantially constant. It is controlled to move downward in the vertical direction.

  The fan device 14 has a plurality of fans arranged in a substantially rectangular shape, and presses the print sheet S discharged from the chain gripper 12 above the discharge table 13 downward in the vertical direction by an air current. The vacuum suction wheel device 17 controls the posture by braking the traveling speed when the printing sheet S is dropped. The vacuum suction wheel device 17 brakes the print sheet S by applying a suction force to the upstream end in the traveling direction Y of the print sheet S.

  The paper pad 16, rear paper aligning device 18, and width direction paper aligning device 19 are connected to the chain gripper 12 with respect to a position below the chain gripper 12 and above the paper discharge tray 13, that is, in a direction parallel to the vertical direction. It is provided between the paper discharge tray 13. The paper pad 16 regulates the downstream side position in the traveling direction Y of the print sheet S, and a plurality of paper pads 16 are provided along the width direction of the print sheet S. The rear paper aligning device 18 regulates the upstream position in the traveling direction Y of the printing sheet S, and is composed of a plurality of plate-like bodies extending in a direction parallel to the vertical direction, and each of the vacuum suction wheel devices 17. Attached to. The width direction paper aligning device 19 aligns the positions of the print sheets S in the width direction.

  In the printing unit 1 having the above-described structure, the printing sheets S stacked on the paper feed tray 6 of the paper feeding unit 2 are picked up one by one from the top by the paper feeding mechanism 7 and supplied to the printing unit 1 of the printing unit 4. Is done. The printing sheet S supplied to the printing unit 1 is conveyed through each printing unit 1 by the impression cylinder 10 and the intermediate cylinder 11 of each printing unit 1, and ink is transferred one after another on the way. In each printing unit 1, water is supplied from the dampening device to the non-image area of the printing plate attached to the plate cylinder 8, and then ink is supplied from the image area of the printing plate. The image line image on the printing plate thus obtained is transferred to a blanket attached to the blanket cylinder 9.

  The printed image transferred to the blanket is transferred to the printing sheet S that passes between the impression cylinder 10 and the blanket cylinder 9, and one color printing is performed. This is repeated in each printing unit 1 for color printing. The color-printed printing sheet S is replaced by the gripper 12 g of the chain gripper 12 from the impression cylinder 10 of the last printing unit 1. The print sheet S conveyed by the gripper 12 g is removed from above the paper discharge tray 13, dropped, and stacked on the paper discharge tray 13. At this time, in order to prevent undried ink from appearing on the back of the upper printing sheet S, powder is sprayed on the printing sheet S in advance when the ink is conveyed by the gripper 12g. The print sheets S stacked on the paper discharge tray 13 are aligned by the fan device 14, the vacuum suction wheel device 17, the paper pad 16, the rear paper alignment device 18, and the width direction paper alignment device 19. Are stacked.

  FIG. 2 is an explanatory diagram illustrating a device configuration of the recording medium conveyance device according to the first embodiment. FIG. 3 is a front view illustrating the apparatus configuration of the recording medium conveyance apparatus according to the first embodiment. The recording medium conveyance device 3M is arranged in the paper feeding unit 2 of the printing press 100 shown in FIG. The recording medium conveyance device 3M delivers the print sheet S conveyed from the paper feeding unit 2 to the printing unit 1 constituting the printing unit 4. The recording medium conveyance device 3M includes a swing gripper 20 that is a recording medium conveyance arm, a recording medium delivery cylinder 26, and a nozzle 30 that is a gas blowing means.

  The swing gripper 20 includes a main body 20B and a gripping claw 22 that is a recording medium gripping means. The main body 20B is supported by a support shaft 21 that is orthogonal to the conveyance direction of the print sheet S (the direction of the arrow Y in FIG. 2) and parallel to the print sheet S, and around the support shaft 21 in the direction of the arrow B2 Rotate. Here, the term “orthogonal” refers to a positional relationship including the case of orthogonality within the range of intersection, error, and variation in addition to perfect orthogonality, and the rotation center (recording medium transport arm) of the main body 20B. The center of rotation) is Zs. A grip claw 22 is provided on the opposite side of the main body 20B from the support shaft 21.

  The grip claw 22 is supported by a grip claw support shaft 23 provided on the side opposite to the support shaft 21 of the main body 20B, and rotates around the grip claw support shaft 23 in the direction of arrow C1. Here, the rotation center (grip claw rotation center) of the gripping claw 22 is Zt. The gripping claw 22 is provided with a recording medium gripping portion 22t at the tip, and when the gripping claw 22 rotates around the gripping claw support shaft 23 in the direction of the arrow C1, the recording medium gripping portion 22t is It rotates in the direction of arrow C2. As a result, the recording medium gripping portion 22t is closed or opened with respect to the recording medium gripping portion (main body side recording medium gripping portion) 20t of the main body portion 20B.

  When the recording medium gripping portion 22t is closed with respect to the main body side recording medium gripping portion 20t, it is said that the gripping claws 22 are in a closed state, and the recording medium gripping portion 22t is in the main body side recording medium gripping portion 20t. The gripping claw 22 is said to be in the open state when it is opened. When the gripping claw 22 is closed with the print sheet S between the recording medium gripping part 22t and the main body side recording medium gripping part 20t, the printing sheet S is separated from the recording medium gripping part 22t and the main body side recording medium. It is gripped by the gripping part 20t. As a result, the print sheet S is held by the swing gripper 20. On the other hand, when the gripping claw 22 is opened with the print sheet S between the recording medium gripping part 22t and the main body side recording medium gripping part 20t, the recording medium gripping part 22t and the main body side recording medium gripping part The gripping of the print sheet S by 20t is released. As a result, the print sheet S is released from the swing gripper 20.

  The recording medium transport device 3M according to the present embodiment includes a nozzle 30 as a gas blowing unit on the side opposite to the support shaft 21 of the main body 20B, that is, on the side where the recording medium gripping part 22t is attached. The nozzle 30 is connected to a pump 33 which is a gas supply means through a gas supply pipe 31 and blows out gas discharged from the pump 33. In this embodiment, air A is used as the gas, but the type of gas is not limited to this. Note that a gas passage may be provided inside the gripping claws 22 so that the gas is blown out from the recording medium gripping portion 22t.

  The nozzle 30 blows out toward the recording medium delivery cylinder 26. An on-off valve 32 is provided between the nozzle 30 and the pump 33 to supply or shut off the air A discharged from the pump 33. Here, the pump 33 and the on-off valve 32 are controlled by a printing press control device 34 used for controlling the printing press 100.

  The recording medium delivery cylinder 26 rotates in the direction of arrow F about the cylinder rotation axis Zr. In the process, the printing sheet S is received from the swing gripper 20 and transferred to the impression cylinder 10 provided in the printing unit 1 shown in FIG. Note that the image line image is transferred from the blanket cylinder 9 included in the printing unit 1 shown in FIG. 1 to the printing sheet S delivered to the impression cylinder 10. The recording medium delivery cylinder 26 includes a delivery cylinder gripping claw 27 as a recording medium gripping means for the delivery cylinder. The delivery cylinder gripping claw 27 is stored in a recess (gripping claw storage section) 26 a formed on the outer periphery of the recording medium delivery cylinder 26. The delivery drum gripping claw 27 is supported by the delivery drum gripping claw support shaft 27S and rotates around the delivery drum gripping claw support shaft 27S. Here, the center of rotation of the delivery cylinder gripping claw 27 (the center of delivery cylinder gripping claw rotation) is Za.

  The transfer drum gripping claw 27 is provided with a recording medium gripping portion 27t at the tip, and when the transfer drum gripping claw 27 rotates around the transfer drum gripping claw support shaft 27S, a recording medium gripping portion is provided. 27t rotates in the direction of arrow E. As a result, the recording medium gripping portion 27t is closed or opened with respect to the outer peripheral surface of the recording medium delivery cylinder 26. When the recording medium gripping part 27t is closed with respect to the outer peripheral surface of the recording medium delivery cylinder 26, the delivery cylinder gripping claw 27 is said to be in a closed state, and the recording medium gripping part 27t is the recording medium delivery cylinder. It is said that the delivery cylinder gripping claw 27 is in an opened state when it is opened with respect to the outer peripheral surface of the 26.

  When the transfer cylinder gripping claw 27 is closed with the printing sheet S between the recording medium gripping part 27t and the outer peripheral surface of the recording medium transfer cylinder 26, the printing sheet S is separated from the recording medium gripping part 27t. It is gripped by the outer peripheral surface of the medium delivery cylinder 26. As a result, the print sheet S is held by the recording medium delivery cylinder 26. On the other hand, when the transfer cylinder gripping claw 27 is opened with the printing sheet S between the recording medium gripping part 27t and the outer peripheral surface of the recording medium transfer cylinder 26, the recording medium gripping part 22t and the recording medium delivery The gripping of the print sheet S by the outer peripheral surface of the cylinder 26 is released. As a result, the print sheet S is released from the recording medium delivery cylinder 26.

  When the printing sheet S conveyed from the sheet feeding unit 2 shown in FIG. 1 is delivered to the recording medium delivery cylinder 26, the recording medium conveyance device 3M applies the front pad 24 to align the leading end of the printing sheet S. Prepare. The front pad 24 is supported by a front pad support shaft 25 and rotates around the front pad support shaft 25 in the direction of arrow D. Here, the rotation center (front application rotation center) of the front pad 24 is Zl. The front contact 24 is provided with a recording medium abutting portion 24t at the leading end, and the leading end of the printing sheet S conveyed from the paper feeding unit 2 shown in FIG. 1 contacts the recording medium abutting portion 24t. Thereby, the front-end | tip part of the printing sheet S is arrange | equalized. By rotating the front pad 24 around the front support shaft 25 in the direction of arrow D, the recording medium contact portion 24t rotates in the direction of arrow B1. As a result, when the print sheet S holding the swing gripper 20 rotates in the traveling direction of the print sheet S (the arrow Y direction in FIG. 2), the front pad 24 also rotates together with the swing gripper 20. .

  As shown in FIG. 3, the support shaft 21, the grip claw support shaft 23, and the front contact support shaft 25 are supported by the operation side frame FC and the drive side frame FD of the printing press 100 shown in FIG. Here, the operation side is a side on which the operation panel of the printing press 100 is disposed, and the drive side is a side on which a drive mechanism for driving the impression cylinder 10 and the plate cylinder 8 is disposed. The support shaft 21, the gripping claw support shaft 23, and the front contact support shaft 25 are driven by swing gripper drive means 29S, grip claw drive means 29t, and front contact drive means 29l, respectively.

  4A to 4D are explanatory diagrams illustrating the operation of the recording medium conveyance device according to the first embodiment. The operation of the recording medium conveying apparatus according to the present embodiment will be described with reference to FIGS. For convenience of explanation, the front pad 24 shown in FIG. 2 is omitted. FIG. 4A illustrates a state in which the print sheet S conveyed from the sheet feeding unit 2 illustrated in FIG. 1 is gripped by the gripping claws 22 of the swing gripper 20. The time T at this time is T0. Further, the position of the swing gripper 20 at this time is referred to as a home position. That is, the home position is a position at which the swing gripper 20 receives the print sheet S conveyed from the paper feeding unit 2 shown in FIG. The swing gripper 20 that holds the print sheet S rotates toward the impression cylinder 10 of the printing unit 1 shown in FIG. 1 (in the direction of arrow B1 in FIG. 4A).

  When the swing gripper 20 rotates toward the impression cylinder 10 (in the direction of arrow B1 in FIG. 4-1) and the recording medium delivery cylinder 26 rotates (in the direction of arrow F in FIG. 4-1), FIG. As shown, the swing gripper 20 and the transfer cylinder gripping claw 27 of the recording medium transfer cylinder 26 intersect. This position is called a recording medium delivery position. At the recording medium delivery position, an angle (swing gripper rotation angle) θ between the straight line L connecting the recording medium transport arm rotation center Zs and the drum rotation axis Zr and the swing gripper 20 is set to zero. When the swing gripper 20 rotates toward the impression cylinder 10 (in the direction of arrow B1 in FIG. 4A), the front pad 24 shown in FIG. 2 also rotates toward the impression cylinder 10 together with the swing gripper 20 (FIG. 4). -1 arrow B1 direction).

  At the recording medium delivery position, the print sheet S is delivered from the grip claw 22 of the swing gripper 20 to the delivery cylinder grip claw 27. This time T is T1. At the time of delivery of the printing sheet S, the gripping claws 22 of the swing gripper 20 are opened to release the printing sheet S from the swing gripper 20, and the delivery cylinder gripping claws 27 are closed to grip the recording medium of the delivery cylinder gripping claws 27. The unit 27t grips the print sheet S. When the swing gripper 20 transfers the print sheet S to the transfer cylinder gripping claw 27, the swing gripper 20 rotates toward the home position. That is, it rotates in the direction of arrow B1 ′ in FIG. In order to avoid the swing gripper 20 from interfering with the printing sheet S gripped by the delivery cylinder gripping claws 27 when the swing gripper 20 rotates toward the home position, the swing gripper 20 From the delivery position further toward the impression cylinder 10 (in the direction of arrow B1 in FIG. 4B), the swing gripper rotation angle θ is rotated until it reaches θ1, and then returns to the home position.

  The front pad 24 returns to the home position before the swing gripper 20. That is, in the state of FIG. 4-2, it has already moved toward the home position. Therefore, there is a possibility that the printing sheet S and the front pad 24 come into contact with each other. For this reason, it is also possible to attach the gas blowing means to the front pad and blow out air from the gas blowing means toward the recording medium delivery cylinder 26 when the front pad 24 starts returning to the home position.

  FIG. 4-3 illustrates a state where the swing gripper 20 is being rotated toward the home position. At this time, the printing sheet S passes between the grip claw 22 of the swing gripper 20 and the recording medium delivery cylinder 26. The time T at this time is T2. At this time, air A is blown out from the nozzle 30 toward the recording medium delivery cylinder 26. The printing sheet S passing between the gripping claws 22 of the swing gripper 20 and the recording medium delivery cylinder 26 is given a pressing force toward the recording medium delivery cylinder 26 by the air A. Contact between S and the gripping claws 22 of the swing gripper 20 can be avoided. Thereby, the damage | wound which generate | occur | produces on the surface of the printing sheet S can be suppressed. Moreover, the stain | pollution | contamination (for example, adhesion of ink, paper powder, etc.) of the holding claw 22 of the swing gripper 20 can also be suppressed.

  In the state shown in FIG. 4-4, that is, at time T = T3, the impression cylinder 10 receives the printing sheet S from the recording medium delivery cylinder 26, and the line image is transferred from the blanket cylinder 9 to the printing sheet S shown in FIG. Has been. The delivery mechanism of the printing sheet S between the impression cylinder 10 and the recording medium delivery cylinder 26 is the same as the delivery mechanism of the printing sheet S between the recording medium delivery cylinder 26 and the swing gripper 20 described above. When the swing gripper 20 returns to the home position, the swing gripper 20 grips the print sheet S that is next conveyed to the recording medium delivery cylinder 26. The time T at this time is T3. The swing gripper 20 and the recording medium delivery cylinder 26 that have gripped the print sheet S repeat the above operation to convey the print sheet S from the paper feeding unit 2 to the printing unit 4 shown in FIG.

  In the present embodiment, at least after the swing gripper 20 delivers the printing sheet S to the recording medium delivery cylinder 26 (that is, after T = T1) and until the swing gripper 20 returns to the home position (that is, T = T3), air A is blown from the nozzle 30 to avoid contact between the print sheet S and the gripping claws 22 of the swing gripper 20. This control can be realized by, for example, the printing press control device 34 shown in FIG. 2 opening and closing the on-off valve 32 and turning the pump 33 on and off. Thus, by blowing out the air A from the nozzle 30 for a predetermined time, the consumption of the air A can be suppressed and the driving energy of the pump 33 can be suppressed. In addition to the above timing, air A may be blown out from the nozzle 30 in order to clean the paper dust adhering to the recording medium conveyance device 3M.

  In addition, when the swing gripper rotation angle θ becomes θ1, the air A may be blown out from the nozzle 30. In this way, at the beginning of the air A blowout, the angle formed by the air A blowout direction and the print sheet S becomes nearly parallel, and the angle gradually increases as the swing gripper 20 returns to the home position. (Ie close to 90 degrees). As a result, the force for pressing the print sheet S against the recording medium delivery cylinder 26 gradually increases. When the air A is blown out from the nozzle 30, the print sheet S is already delivered to the impression cylinder 10 and printing may be started. In this way, the print sheet S is pressed against the recording medium delivery cylinder 26. By gradually increasing the force, it is possible to minimize the influence on printing even when printing has already started.

  FIG. 5 is a schematic diagram for explaining the air blowing direction. In the present embodiment, as shown in FIG. 5, the direction of the air A blown out from the nozzle 30 toward the recording medium delivery cylinder 26 is the recording medium conveyance at the recording medium delivery position (see FIG. 4-2). When viewed from the direction of the arm rotation center Zs, the direction is parallel to a straight line L connecting the recording medium transport arm rotation center Zs and the drum rotation axis Zr. In this way, when the swing gripper 20 returns to the home position, when the distance between the print sheet S and the gripping claws 22 of the swing gripper 20 is the shortest, it is substantially perpendicular to the surface of the print sheet S. Air A can be blown from the direction. As a result, the printing sheet S can be efficiently pressed against the recording medium delivery cylinder 26, and contact between the gripping claws 22 of the swing gripper 20 and the printing sheet S can be avoided.

  The direction of the air A blown out from the nozzle 30 toward the recording medium delivery cylinder 26 is not limited to the above direction. For example, when the air A is blown out from the recording medium transport arm rotation center Zs when viewed from the direction of the recording medium transport arm rotation center Zs, the feeding side is more than the straight line L connecting the recording medium transport arm rotation center Zs and the drum rotation axis Zr. It may be tilted toward the MS (arrow A1 direction) or may be tilted toward the printing side PS (arrow A2 direction). The blowing direction of the air A can be changed to an appropriate direction according to the printing conditions such as the type and thickness of the printing sheet, the temperature and humidity, the printing speed, and the pattern. Further, gas blowing conditions such as the flow rate and pressure of the air A may be changed according to the printing conditions. For example, when the thickness of the printing sheet S is thin, the spraying pressure can be lowered or the spraying itself can not be executed. As a result, when the probability of contact between the print sheet S and the swing gripper 20 is low, the energy required for blowing out air can be reduced.

  FIG. 6 is a schematic diagram illustrating a configuration of a gas blowing unit according to a modification of the first embodiment. The nozzle 30A, which is the gas blowing means, includes a nozzle body 30N and a nozzle rotating part 30B. The nozzle body 30N is attached to the nozzle rotation part 30B and rotates around the nozzle rotation axis Zn. The nozzle rotation axis Zn is parallel to the recording medium conveyance arm rotation center Zs. With this configuration, the nozzle 30 </ b> A can change the blowing direction of the air A. If the nozzle 30A is configured to be driven by the actuator, the air A blowing direction can be controlled even during printing. For example, the printing press controller 34 shown in FIG. 2 can control the blowing direction of the air A according to the printing conditions to more reliably avoid the contact between the gripping claws 22 of the swing gripper 20 and the printing sheet S. it can.

  FIG. 7 is a flowchart illustrating an operation procedure of the recording medium conveyance device according to the first embodiment. When printing is started by the printing press 100 illustrated in FIG. 1, the printing sheet S is conveyed from the paper feeding unit 2 to the paper feeding unit 3. As shown in FIGS. 4A and 4B, the swing gripper 20 of the recording medium conveyance device 3M provided in the paper feeding unit 3 shown in FIG. 2 grips the printing sheet S and transfers the recording medium transfer cylinder. Deliver to 26. The printing press controller 34 determines whether or not the print sheet S has been delivered to the recording medium delivery cylinder 26 (step S101). When the delivery has not been completed (step S101: No), the process returns to START and the determination is continued.

  When the delivery is completed (step S101: Yes), the printing press control device 34 drives the pump 33 and opens the on-off valve 32, and blows out air A from the nozzle 30 toward the recording medium delivery cylinder 26 for printing. Air A is blown onto the sheet S (step S102). Note that the timing at which the air A is blown from the nozzle 30 may be after the print sheet S has been delivered to the recording medium delivery cylinder 26. For example, when the swing gripper 20 has moved to the most impression cylinder 10 side (FIG. 4). The air A may be blown out from the nozzle 30 (when θ = θ1 of 2).

  Next, the printing press controller 34 determines whether or not the swing gripper 20 has arrived at a position for receiving the print sheet S conveyed from the paper feed unit 2 shown in FIG. 1, that is, the home position (step S103). When the swing gripper 20 is not at the receiving position (step S103: No), the printing press control device 34 continues to blow out the air A from the nozzle 30. When the swing gripper 20 has arrived at the receiving position (step S103: Yes), the printing press controller 34 stops the blowing of air A from the nozzle 30 (step S104). When stopping the blowing of air A, the pump 33 may be stopped, or the on-off valve 32 may be closed while the pump 33 is driven. Since the printing sheet S is frequently delivered to the recording medium delivery cylinder 26 during printing, it is preferable to switch between blowing out the air A from the nozzle 30 and stopping the blowing by opening and closing the on-off valve 32.

  As described above, in the present embodiment and the modifications thereof, in the present embodiment, the recording medium delivery cylinder is applied to the recording medium by the gas blowing unit that blows out the gas from the recording medium conveyance arm side toward the recording medium delivery cylinder. A pressing force toward is applied. As a result, contact between the recording medium and its peripheral devices can be suppressed. Further, by blowing high-temperature air onto the recording medium, drying of the printing surface of the recording medium that has already been printed on one surface can be promoted.

(Embodiment 2)
The second embodiment has the same configuration as that of the first embodiment, except that a gas blowing means is provided in a stationary system (frame) of the printing press instead of the recording medium transport arm (swing gripper). Other configurations and controls are the same as those in the first embodiment.

  FIG. 8 is an explanatory diagram illustrating a device configuration of a recording medium conveyance device according to the second embodiment. FIG. 9 is a plan view showing the configuration of the gas blowing means according to the second embodiment. FIG. 10 is a schematic diagram illustrating a configuration of a gas blowing unit according to a modification of the second embodiment. The gas blowing means provided in the recording medium conveyance device 3M according to the present embodiment is configured by arranging a plurality of nozzles 30a on the side periphery of a cylindrical gas supply pipe 35.

  As shown in FIG. 9, the plurality of nozzles 30 a are arranged in parallel with the tube axis Zp of the gas supply tube 35. The gas supply pipe 35 is attached to the stationary system of the printing press 100 shown in FIG. 1, that is, the frame (the driving side frame FD and the operation side frame FC). Thus, in this embodiment, since the gas supply pipe 35 is fixed to the frame of the printing press 100, the gas supply pipe 35 and the nozzle 30a do not move together with the operation of the swing gripper 20. Thus, in this embodiment, since the gas blowing means is attached to the stationary system of the printing press 100, the installation becomes easier as compared with the case where the gas blowing means is provided in the swing gripper 20.

  As shown in FIG. 9, air A is supplied to the gas supply pipe 35 from the pump 33 via the on-off valve 32. The air A supplied to the gas supply pipe 35 is distributed to the respective nozzles 30 a and then blown out toward the recording medium delivery cylinder 26. The timing at which the air A is blown out from the nozzle 30a is the same as in the first embodiment. That is, air A is blown out from the nozzle 30a after at least the swing gripper 20 has delivered the print sheet S to the recording medium delivery cylinder 26 and before the swing gripper 20 has returned to the home position.

  The blowing direction of the air A is also as described in the first embodiment. In the present embodiment, the blowing direction of the air A may be directed to the trunk rotation axis Zr. Furthermore, as shown in FIG. 10, the direction of the air A blown from the nozzle 30 a may be changed by rotating the gas supply pipe 35 around the tube axis Zp of the gas supply pipe 35. In this case, as described in the first embodiment, the gas blowing conditions such as the blowing direction of the air A and the blowing pressure may be changed according to the printing conditions of the printing press 100.

  As described above, the pressing force toward the recording medium delivery cylinder is applied to the recording medium by the gas blowing means for blowing the gas from the recording medium conveying arm side toward the recording medium delivery cylinder. As a result, contact between the recording medium and its peripheral devices can be suppressed. Further, by attaching the gas blowing means to the frame of the printing press, the gas blowing means can be more easily attached as compared with the case where the gas blowing means is attached to the recording medium conveying arm with movement.

  Further, the gas blowing means attached to the recording medium conveying arm described in the first embodiment and the gas blowing means attached to the stationary system of the printing press according to the present embodiment may be used in combination. In this way, it is possible to more reliably prevent the recording medium from contacting the peripheral device.

(Embodiment 3)
FIG. 11 is an explanatory diagram showing a device configuration of a recording medium suction unit according to the third embodiment. FIG. 12 is a plan view illustrating a configuration of a recording medium suction unit according to the third embodiment. The third embodiment is characterized in that a recording medium suction means for sucking the recording medium is provided in the recording medium delivery cylinder 26. As shown in FIG. 11, in this embodiment, a plurality of gas suction ports 36 are formed in the outer peripheral portion of the body main body 26Ab of the recording medium delivery cylinder 26A in the circumferential direction. As shown in FIG. 12, the plurality of gas suction ports 36 are arranged in parallel with the trunk rotation axis Zr.

  The recording medium delivery cylinder 26A has a hollow structure, and the cylinder inner space 26AI surrounded by the cylinder body 26Ab of the recording medium delivery cylinder 26A and the end plate 26At that seals both ends of the cylinder body 26Ab is an open / close valve. A suction pump 38 which is a gas suction means is connected through 37. The on-off valve 37 and the suction pump 38 are controlled by the printing press controller 34. When the on-off valve 37 is opened and the suction pump 38 is driven, the air A in the in-cylinder space 26AI is sucked out of the in-cylinder space 26AI by the suction pump 38, and the pressure in the in-cylinder space 26AI becomes lower than the atmospheric pressure. .

  In this state, when the print sheet S closes the gas suction port 36, the print sheet S is sucked by the cylinder body 26Ab of the recording medium delivery cylinder 26A due to the pressure difference between the inside and outside of the cylinder space 26AI. Thereby, when the swing gripper 20 shown in FIG. 2 returns to the home position, the contact between the grip claw 22 of the swing gripper 20 and the print sheet S can be avoided, and the occurrence of scratches on the print sheet S can be suppressed. As described above, in the present embodiment, the recording medium suction unit includes the gas suction port 36 formed in the recording medium delivery cylinder 26A and the suction pump 38 that sucks gas from the cylinder internal space 26AI.

  The timing of suction by the gas suction port 36 is the same as the timing of blowing out the air A in the first and second embodiments. In other words, at least after the swing gripper 20 delivers the print sheet S to the recording medium delivery cylinder 26 and before the swing gripper 20 returns to the home position, the suction of the print sheet S by the gas suction port 36 is started. The contact between the print sheet S and the gripping claws 22 of the swing gripper 20 is avoided. In the present embodiment, the printing press control device 34 operates the suction pump 38 and the on-off valve 37 to control the suction of the print sheet S by the gas suction port 36. In this case, since the printing sheet S is frequently delivered to the recording medium delivery cylinder 26A, it is preferable to switch between suction and non-suction of the printing sheet S by the gas suction port 36 by opening and closing the on-off valve 37. Further, the suction conditions such as the suction pressure may be changed according to the printing conditions such as the thickness of the print sheet S and the temperature during printing. As a result, stability against disturbance can be improved.

  13A and 13B are schematic diagrams illustrating a recording medium suction unit according to a modification of the third embodiment. FIG. 14 is an explanatory diagram illustrating an apparatus configuration example of a recording medium suction unit according to a modification of the third embodiment. In this modified example, the recording medium delivery cylinder 26B has a double structure in which the inner cylinder 26B2 is disposed inside the outer cylinder 26B1, and when the printing sheet S is conveyed, both are centered on the cylinder rotation axis Zr. It rotates in the direction of arrow F in FIGS. 13-1 and 13-2. Further, the inner cylinder 26B2 can rotate around the cylinder rotation axis Zr independently of the outer cylinder 26B1. A plurality of outer body gas suction ports 36_1 are formed in the circumferential direction of the outer body 26B1, and a plurality of inner body gas suction ports 36_2 are formed in the circumferential direction of the inner body 26B2. Further, the outer trunk gas suction port 36_1 and the inner trunk gas suction port 36_2 are arranged in parallel with the trunk rotation axis Zr.

  The inner cylinder inner space 26B2I of the inner cylinder 26B2 is connected to the suction pump 38 described in FIG. 12, and during the printing of the printing press 100 shown in FIG. Air A is sucked. That is, during operation of the printing press 100, the inner cylinder space 26B2I is always at a negative pressure. As shown in FIG. 13A, when the positions of the inner trunk gas suction port 36_2 and the outer trunk gas suction port 36_1 match, both are communicated. In this state, when the printing sheet S closes the outer cylinder gas suction port 36_1, the printing sheet S is sucked to the outer cylinder 26B1 of the recording medium delivery cylinder 26B due to a pressure difference between the inside and the outside of the inner cylinder space 26B2I. It is done. Thereby, even when the swing gripper 20 shown in FIG. 2 returns to the home position, the contact between the gripping claws 22 of the swing gripper 20 and the print sheet S can be avoided, and the occurrence of scratches on the print sheet S can be suppressed.

  On the other hand, if suction of the print sheet S is not necessary, if the suction is performed, the print sheet S may be sucked to the recording medium delivery cylinder 26B, and may be affected when the print sheet S is delivered from the swing gripper 20. . For this reason, in this embodiment, when the suction of the printing sheet S is unnecessary due to the above structure, the suction to the recording medium delivery cylinder 26B is stopped.

  When there is no need to suck the print sheet S onto the outer cylinder 26B1 of the recording medium delivery cylinder 26B, the inner cylinder 26B2 continues to rotate with the outer cylinder 26B1, and around the cylinder rotation axis Zr as shown in FIG. It rotates in the direction of the arrow G shown. Accordingly, the positions of the inner trunk gas suction port 36_2 and the outer trunk gas suction port 36_1 are different. As a result, the print sheet S is not sucked by the outer cylinder 26B1 of the recording medium delivery cylinder 26B.

  FIG. 14 is an explanatory diagram showing a device configuration example of a recording medium suction unit according to a modification of the present embodiment. In the present embodiment, the outer cylinder 26B1 and the inner cylinder 26B2 of the recording medium delivery cylinder 26B constituting the recording medium suction means are configured using a cam 39. The cam 39 is attached to the stationary system (frame) of the printing press 100 shown in FIG.

  A cam follower 40A attached to one end of a switching arm 41 that swings around a fulcrum 42 is in contact with the cam 39, and the switching arm 41 is moved according to the suction profile K1 and the suction stop profile K2 of the cam 39. Rock. The end of the switching arm 41 that is opposite to the end to which the cam follower 40A is attached is connected to the inner trunk 26B2 by a link 40B.

  In the state shown in FIG. 14, since the cam follower 40A is on the suction profile K1 of the cam 39, the positions of the inner cylinder gas suction port 36_2 and the outer cylinder gas suction port 36_1 match, and the print sheet S is recorded. It is sucked by the outer cylinder 26B1 of the medium delivery cylinder 26B. When the outer cylinder 26B1 and the inner cylinder 26B2 of the recording medium delivery cylinder 26B rotate in the direction of arrow F in FIG. 14 and the cam follower 40A moves onto the suction stop profile K2 of the cam 39, the switching arm 41 is It swings around the fulcrum 42. As a result, the link 40B moves the inner cylinder 26B2 in the circumferential direction, so the positions of the inner cylinder gas suction port 36_2 and the outer cylinder gas suction port 36_1 are different. As a result, the print sheet S is not sucked by the outer cylinder 26B1 of the recording medium delivery cylinder 26B.

  In this manner, suction and non-suction are switched while the outer drum 26B1 and the inner drum 26B2 of the recording medium delivery drum 26B make one rotation around the drum rotation axis Zr. The suction profile K1 indicates that the swing gripper 20 returns to the home position after the swing gripper 20 delivers the print sheet S to the recording medium delivery cylinder 26 during one rotation of the recording medium delivery cylinder 26B. It is provided in the period until. In addition, for example, the recording medium delivery cylinder 26B may be detected by a sensor, and the inner cylinder 26B2 may be rotated by an actuator to switch between suction and non-suction.

  As described above, in the present embodiment, since the recording medium delivery cylinder sucks the recording medium, the recording medium conveyance device can suppress contact between the recording medium and its peripheral devices. The gas blowing means described in the first and second embodiments may be combined with the recording medium delivery cylinder including the recording medium suction means according to the present embodiment. In this way, not only the blowing of gas but also the suction force can be used, so that the contact between the recording medium and its peripheral devices can be avoided more reliably.

  As described above, the recording medium transport apparatus and the printing press according to the present invention are useful for transporting the recording medium from the paper feeding unit to the printing unit, and particularly suppresses scratches generated on the recording medium. Suitable for that.

1 is an overall schematic diagram of a printing machine configured by combining the printing machines according to Embodiment 1. FIG. FIG. 3 is an explanatory diagram illustrating a device configuration of a recording medium conveyance device according to the first embodiment. 1 is a front view illustrating a device configuration of a recording medium conveyance device according to Embodiment 1. FIG. FIG. 6 is an explanatory diagram illustrating an operation of the recording medium conveyance device according to the first embodiment. FIG. 6 is an explanatory diagram illustrating an operation of the recording medium conveyance device according to the first embodiment. FIG. 6 is an explanatory diagram illustrating an operation of the recording medium conveyance device according to the first embodiment. FIG. 6 is an explanatory diagram illustrating an operation of the recording medium conveyance device according to the first embodiment. It is a schematic diagram explaining the blowing direction of air. It is a schematic diagram which shows the structure of the gas blowing means which concerns on the modification of Embodiment 1. 4 is a flowchart illustrating an operation procedure of the recording medium transport device according to the first embodiment. FIG. 6 is an explanatory diagram illustrating a device configuration of a recording medium conveyance device according to a second embodiment. It is a top view which shows the structure of the gas blowing means which concerns on Embodiment 2. It is a schematic diagram which shows the structure of the gas blowing means which concerns on the modification of Embodiment 2. FIG. 10 is an explanatory diagram illustrating a device configuration of a recording medium suction unit according to a third embodiment. FIG. 6 is a plan view illustrating a configuration of a recording medium suction unit according to a third embodiment. FIG. 10 is a schematic diagram illustrating a recording medium suction unit according to a modification of the third embodiment. FIG. 10 is a schematic diagram illustrating a recording medium suction unit according to a modification of the third embodiment. FIG. 10 is an explanatory diagram illustrating a device configuration example of a recording medium suction unit according to a modification of the third embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printing unit 2 Paper feed part 3 Paper feed part 3M Recording medium conveyance apparatus 4 Printing part 5 Paper discharge part 8 Plate cylinder 9 Blanket cylinder 10 Impression cylinder 20 Swing gripper 20B Main body part 20t Main body side recording medium gripping part 21 Support shaft 22 gripping claw 22t recording medium gripping part 23 gripping claw support shaft 24t recording medium abutting part 25 front contact support shaft 26, 26A, 26B recording medium delivery cylinder 27 delivery cylinder gripping claw 27S delivery cylinder gripping claw support shaft 27t covered Recording medium gripping part 30, 30A, 30a Nozzle 31 Gas supply pipe 32 Open / close valve 33 Pump 34 Printer control device 35 Gas supply pipe 36 Gas suction port 36_1 Outer cylinder gas suction port 36_2 Inner cylinder gas suction port 37 Open / close valve 38 Suction pump 100 printer 101 electric motor for driving printer

Claims (14)

In a recording medium conveyance device that is disposed between a printing unit and a paper feeding unit provided in a printing machine and delivers a recording medium from the paper feeding unit to the printing unit,
It rotates around a support shaft that is orthogonal to the transport direction of the recording medium and parallel to the recording medium in a transported state, and is transported from the paper feeding unit. A recording medium transport arm having the recording medium gripping means for gripping the recording medium and delivering the recording medium to a recording medium delivery cylinder for transporting the recording medium to the printing unit;
Gas blowing means for blowing gas toward the recording medium delivery cylinder;
A recording medium conveying apparatus comprising:   2. The recording medium conveying apparatus according to claim 1, wherein the gas blowing means is provided on a side of the recording medium conveying arm to which the recording medium gripping means is attached.   The recording medium conveying apparatus according to claim 1, wherein the gas blowing unit is attached to a frame of the printing machine and blows out gas toward the recording medium delivery cylinder. The blowing direction of the gas blowing means by the gas blowing means is
4. The recording medium conveying arm according to claim 1, wherein the recording medium conveying arm is in a direction to return to the paper feeding unit after delivering the recording medium to the recording medium delivery cylinder. Recording medium transport device. The blowing direction of the gas blowing means by the gas blowing means is
The recording medium according to claim 1, wherein the recording medium conveyance arm is rotated in order to deliver the recording medium to the recording medium delivery cylinder. Medium transport device.   The recording medium conveyance according to claim 1, wherein the gas blowing unit is capable of changing a gas blowing direction by rotating around an axis parallel to the support shaft. apparatus.   7. The recording medium conveyance arm according to claim 1, wherein at least the recording medium transport arm blows the gas during the return to the paper feeding unit after delivering the recording medium to the recording medium delivery cylinder. 2. A recording medium conveying apparatus according to claim 1.   The recording medium conveyance device according to claim 1, wherein the gas blowing condition is changed based on a printing condition of the printing press.   The recording medium delivery cylinder receives the recording medium conveyed by the recording medium conveyance arm by a recording medium gripping means provided on an outer peripheral portion, and sucks the recording medium to the surface. The recording medium conveyance device according to claim 1, further comprising a medium suction unit.   The recording medium conveying apparatus according to claim 9, wherein a condition for sucking the recording medium to a surface is changed based on a printing condition of the printing press. In a recording medium feeding unit that is arranged between a printing unit and a paper feeding unit provided in the printing machine and delivers a recording medium from the paper feeding unit to the printing unit,
The recording medium gripped by the recording medium gripping means provided at the tip is gripped by the recording medium, and perpendicular to the transport direction of the recording medium and in the transported state. A recording medium transport arm that rotates around a support shaft that is arranged in parallel with the recording medium;
Recording medium that receives the recording medium conveyed by the recording medium conveyance arm by a recording medium gripping means provided on an outer peripheral portion, sucks the recording medium to the surface, and conveys the recording medium to the printing unit A medium delivery cylinder;
A recording medium conveying apparatus comprising: The recording medium delivery cylinder is
2. The recording medium transport arm according to claim 1, wherein the recording medium transport arm sucks the recording medium to the surface while delivering the recording medium to the recording medium delivery cylinder and then returning to the paper feeding unit. 11. A recording medium conveying apparatus according to item 11.   The recording medium conveying apparatus according to claim 12, wherein a condition for sucking the recording medium to the surface is changed based on a printing condition of the printing press. A printing unit for printing a line image on a recording medium;
A paper feeding unit that supplies a recording medium to be printed to the printing unit;
14. The recording medium according to claim 1, wherein the recording medium that is disposed between the sheet feeding unit and the printing unit and is conveyed from the sheet feeding unit is conveyed to the printing unit. A recording medium conveying device;
A printing machine comprising:

Images