JP6817723B2 - Printer - Google Patents

Description

The present invention relates to a printing machine in which a sheet is conveyed from a printing cylinder to a discharge pile via a discharge cylinder and a discharge belt.

As a conventional printing machine, for example, as described in Patent Document 1, there is a machine that uses a discharge belt when transporting a printed sheet to a discharge pile. The printing press disclosed in Patent Document 1 includes a plurality of inkjet nozzles that spray ink onto a sheet held in a printing cylinder. The printed sheet is sequentially conveyed from the printing cylinder to the discharge belt via the first to third discharge side cylinders, and is further conveyed by the discharge belt and discharged onto the discharge pile. Further, this printing machine is provided with an inversion portion in which the front and back sides of the sheet are inverted in order to print on both sides of the sheet.

This reversing part swings by holding a pre-reversing double cylinder that receives and holds the sheet from the second discharge side transfer cylinder and an end portion of the sheet held by the pre-reversing double cylinder on the upstream side in the transport direction. It is equipped with a reversing swing device that is delivered to the printing cylinder. The pre-inverted double cylinder is located below the printing cylinder. Therefore, the second discharge-side transfer cylinder is positioned below the first discharge-side transfer cylinder.
The third discharge-side transfer cylinder is located horizontally aligned with the second discharge-side transfer cylinder, and is arranged on the side opposite to the printing cylinder.

The discharge belt has a configuration in which a sheet released at the lower end of the third discharge side transfer cylinder is placed. Therefore, the discharge belt extends substantially horizontally from the lower vicinity of the third discharge side transfer cylinder to the side opposite to the printing cylinder.
The discharge pile has a loading surface on which the printed sheet is loaded, and lowers according to the number of loaded sheets with the height equivalent to the discharge belt as the uppermost position. Generally, a guide member for guiding the sheet released from the discharge belt onto the loading surface is provided above the discharge pile. A part of this guide member is positioned at the retracted position when the sheet is taken out from the printing machine together with the discharge pile.

Japanese Unexamined Patent Publication No. 2013-241264

In the printing machine shown in Patent Document 1, since the discharge belt is arranged at a low position, there is a limit in increasing the number of sheets loaded on the discharge pile. Further, a guide member for guiding the sheet onto the discharge pile is provided at a low position. Therefore, this printing machine has a problem that it is difficult to take out the printed sheet from the printing machine.

That is, in a conventional printing machine in which a printed sheet is conveyed by a discharge belt, it is required to provide a discharge pile capable of loading a large number of sheets and to make it easy to take out the printed sheet. In responding to such a request, it is necessary to avoid raising the position of the printing unit. The reason for this is that workability such as maintenance and repair work of various devices constituting the printing unit is lowered.

The present invention has been made to solve such a problem, and although the height of the entire printing machine is kept low, a large amount of sheets are loaded on the discharge pile and the printed sheets are printed. An object of the present invention is to provide a printing machine that can be easily taken out.

In order to achieve this object, the printing machine according to the present invention includes a sheet supply device that supplies sheets as a printing medium one by one, and a printing cylinder holding device that holds the sheets supplied by the sheet supply device. A printing cylinder for transporting the sheet, a printing unit for printing on the sheet transported by the printing cylinder, and a printing unit provided on the downstream side in the sheet transporting direction from the printing unit to receive the sheet from the printing cylinder holding device. One discharge cylinder having a function and a function of releasing the sheet on the downstream side in the transport direction, a discharge pile having a loading surface on which the printed sheet is loaded, and a discharge pile that receives the sheet from the discharge cylinder and transports the sheet to the discharge pile. It includes a discharge belt , a reversing part holding device having a function of receiving a sheet conveyed by the discharge cylinder and a function of holding and transporting the sheet, and includes a discharge side transfer cylinder, a reversing front double cylinder, and a reversing swing device. In the middle of the transfer, the front and back sides of the sheet are inverted, and the inverted sheet is delivered to the printing cylinder holding device and supplied to the printing cylinder, and the transfer destination of the sheet conveyed by the discharge cylinder is described. The discharge cylinder is provided with a discharge cylinder side distribution means for distributing to either one of the discharge belt and the reversing portion, and the discharge cylinder is configured as a single cylinder equipped with a set of gripping devices for delivering and receiving sheets. Is.

In the present invention, in the printing machine, the sampling pile arranged above the discharge pile and the transport destination of the sheet transported by the discharge belt are distributed to either the sampling pile or the discharge pile. It may be provided with a discharge belt side distribution means.

According to the present invention, since the printed sheet is sent from the printing cylinder to the discharge belt via one discharge cylinder, the position of the discharge belt is the discharge belt described in Patent Document 1 without changing the height of the print cylinder. It will be higher than. By providing the discharge belt at a high position, the uppermost position of the discharge pile is raised, and the number of sheets that can be loaded on the discharge pile is increased.
Therefore, according to the present invention, it is possible to provide a printing machine in which a large amount of sheets are loaded on the discharge pile and the printed sheets can be easily taken out even though the height of the entire printing machine is kept low. it can.

It is a side view which shows the schematic structure of the printing machine which concerns on this invention. It is a side view for demonstrating the structure of the grip claw device. It is a side view for demonstrating the structure of the grip claw device. It is a side view for demonstrating the structure of the discharge side switching device. It is sectional drawing for demonstrating the structure of the delivery part. It is a top view for demonstrating the structure of the delivery part. In FIG. 6, the breaking position of FIG. 5 is shown by a VV line. It is a block diagram which shows the structure of a control system.

Hereinafter, an embodiment of the printing press according to the present invention will be described in detail with reference to FIGS. 1 to 7.
The printing machine 1 shown in FIG. 1 includes a feeder unit 2 located on the rightmost side in FIG. 1, a printing unit 3 located in the central portion of FIG. 1, and a delivery unit 4 located on the left side of the printing unit 3. ing. The feeder unit 2 continuously or intermittently feeds the sheets 5 as the printing medium one by one to the printing unit. The sheet 5 is stacked and held on the feeder pile 6 of the feeder portion 2.

When transporting the sheet 5 from the feeder unit 2 to the printing unit 3, the soccer 7 located above the sheet 5 on the feeder pile 6, the feeder board 8 extending toward the printing unit 3, and the transport direction of the feeder board 8 A swing device 9 located near the end on the downstream side, a supply-side transfer cylinder 10 of the printing unit 3, and the like are used.
The soccer 7 includes a first suction 7a and a second suction 7b to which the sheet 5 is sucked, and reciprocates between the feeder pile 6 side and the feeder board 8 side in a predetermined cycle. This cycle corresponds to the time required for the supply-side transfer cylinder 10 to make one rotation.

The first suction 7a and the second suction 7b are connected to the negative pressure source 13 via the continuous supply valve 11 and the intermittent supply valve 12.
The continuous supply valve 11 and the intermittent supply valve 12 both connect and disconnect the suction from the negative pressure source 13 of the first suction 7a and the second suction 7b, but the timing of connecting and disconnecting the suction is different from each other.

The continuous supply valve 11 and the intermittent supply valve 12 are opened in the process in which the soccer 7 moves from the feeder pile 6 side to the feeder board 8 side. The continuous supply valve 11 is used when printing is applied to only one side of the seat 5, and opens once for each reciprocation of the soccer 7. The intermittent supply valve 12 is used when printing is applied to both the front and back surfaces of the seat 5, and opens once every two round trips of the soccer 7. In the case of single-sided printing in which only one side of the sheet 5 is printed, the soccer 7 continuously feeds the sheet 5. At the time of double-sided printing printed on both sides of the sheet 5, the sheet 5 is intermittently sent out by the soccer 7. The operations of the continuous supply valve 11 and the intermittent supply valve 12 are controlled by the control device 14 (see FIG. 7) of the printing machine 1.

The feeder board 8 sequentially sends the sheet 5 mounted by the soccer 7 to the printing unit 3 side.
As shown in FIG. 2, the swing device 9 includes a grip claw device 16 that is supported by the first rotation shaft 15 and swings. The first rotation shaft 15 is rotatably supported by the frame 3a (see FIG. 1) of the printing unit 3 and rotates in synchronization with the rotation of the supply-side transfer cylinder 10. The first rotation shaft 15 rotates forward and reverses once by a predetermined rotation angle each time the supply-side transfer cylinder 10 makes one rotation. The gripping claw device 16 of the swing device 9 has a claw 16a and a claw stand 16b that grip one end of the seat 5 on the downstream side in the transport direction. Hand over to the claw device 17. In the following, the gripping claw device 16 of the swing device 9 is referred to as a "first gripping claw device 16" in order to distinguish it from other gripping claw devices of the body, and the gripping claw device 17 of the supply-side transfer cylinder is referred to as a "second gripping claw device In addition, it is called "claw device 17".

<Structure of supply side transfer>
The supply-side transfer cylinder 10 is rotatably supported by the frame 3a, is connected to a drive device (not shown), and rotates in synchronization with another cylinder described later. Further, the supply-side transfer cylinder 10 has a set of a second grip claw device 17 for holding the end portion of the sheet 5 on the downstream side in the transport direction. The second gripping claw device 17 includes a plurality of claws 17b and a cam follower 17c that swing around the claw shaft 17a, and is provided in the gripping claw device 22 provided on the printing cylinder 21 described later in the printing unit 3. Hand over the sheet 5. The gripping claw device 22 of the printing cylinder 21 includes a plurality of claws 22b and cam followers 22c that swing around the claw shaft 22a. In the following, the gripping claw device 22 of the printing cylinder 21 is simply referred to as a “third gripping claw device 22”.

The second gripping claw device 17 of the supply side transfer cylinder 10 rotates with respect to the receiving cam 23 and the delivering cam 24 provided on the frame 3a, and the cam follower 17c is pushed by these cams 23 and 24. Driven. The cam followers 17c are pressed against the cams 23 and 24 by the spring force of a spring member (not shown).

The claw 17b provided in the second gripping claw device 17 opens when the cam follower 17c is pushed by the receiving cam 23 or the delivering cam 24, and closes when the cam follower 17c exceeds these cams 23 and 24. The receiving cam 23 is fixed to the frame 3a. The receiving cam 23 is positioned at a position where the claw 17b opens and closes when the second gripping claw device 17 receives the sheet 5 from the first gripping claw device 16 of the swing device 9.
The delivery cam 24 is rotatably supported by the frame 3a around a shaft portion 24a located on the same axis as the supply side delivery cylinder 10, and is rotatably supported by the frame 3a. Although not shown in detail, the delivery cam 24 is supplied. It is connected to the side switching device 25.

As the supply-side switching device 25, for example, an equivalent device disclosed in Japanese Patent Application Laid-Open No. 2013-241275 can be used. The supply side switching device 25 drives the delivery cam 24 and positions it at either the delivery position shown by the solid line or the non-delivery position shown by the alternate long and short dash line. The supply side switching device 25 positions and holds the delivery cam 24 at the delivery position during single-sided printing. Further, during double-sided printing, the supply-side switching device 25 uses a drive mechanism that uses a rotary cam (not shown) as a drive source to move the delivery cam 24 to a delivery position and a non-delivery position for each rotation of the supply-side delivery cylinder 10. Positioned alternately with. To switch between the operation mode during single-sided printing and the operation mode during double-sided printing, the open / closed state of the first air supply solenoid valve 26 (see FIG. 7) provided in the supply-side switching device 25 is switched. Is done by. The operation of the solenoid valve 26 is controlled by the control device 14.

When the delivery cam 24 is positioned at the delivery position, the second grip claw device 17 performs the delivery operation. This delivery operation is an operation of delivering the holding sheet 5 to the third gripping claw device 22 of the printing cylinder 21. Further, when the delivery cam 24 is positioned at the non-delivery position, the claw 17b performs an avoidance operation. This avoidance operation is an operation in which the claw 17b opens earlier than the delivery timing of the printing cylinder 21 to the third gripping claw device 22, and passes through the gripping position with the printing cylinder 21 in the opened state. In this case, the claw 17b avoids contact with the backside printing sheet 5 held by the third gripping claw device 22 of the printing cylinder 21 during double-sided printing. In this embodiment, the supply side transfer cylinder 10 corresponds to the "seat supply device" in the present invention. Further, in this embodiment, the third gripping claw device 22 of the printing cylinder 21 corresponds to the "printing cylinder holding device" in the present invention.

<Structure of the third grip claw device of the printing cylinder>
The claw 22b provided on the third gripping claw device 22 of the printing cylinder 21 is pushed by the cam followers 22c by the first and second receiving cams 27 and 28 and the delivery cam 29 (see FIG. 3). By opening and closing by crossing these cams 27-29. The cam followers 22c are also pressed against the cams 27 to 29 by the spring force of a spring member (not shown).

The first receiving cam 27 and the delivering cam 29 are fixed to the frame 3a. The first receiving cam 27 is provided at a position where the claw 22b opens and closes when the third gripping claw device 22 receives the sheet 5 from the reversing swing device 31, which will be described later. The delivery cam 29 is provided at a position where the claw 22b opens and closes when the sheet 5 is delivered to the grip claw device 33 of the discharge cylinder 32 (see FIGS. 1 and 3) described later by the third grip claw device 22. There is.

The second receiving cam 28 is swingably supported by the frame 3a about the support shaft 28a, and is driven by the supply-side switching device 25 described above to swing, so that the protruding position shown by the solid line is reached. , It is positioned at either of the retracted positions indicated by the alternate long and short dash line. The supply side switching device 25 positions and holds the second receiving cam 28 at the protruding position during single-sided printing. Further, at the time of double-sided printing, the supply side switching device 25 sets the second receiving cam 28 to the protruding position for each rotation of the supply side transfer cylinder 10 by a drive mechanism using a rotary cam (not shown) as a drive source. Positioned alternately with the retracted position.

When the second receiving cam 28 is positioned at the protruding position during double-sided printing, it is a case where the second gripping claw device 17 of the supply side transfer cylinder 10 holds the sheet 5 in the grip. When the second receiving cam 28 is positioned at the protruding position, the third gripping claw device 22 of the printing cylinder 21 receives the sheet 5 from the second gripping claw device of the supply side transfer cylinder 10. On the other hand, when the second receiving cam 28 is positioned at the retracted position, the second receiving cam 28 passes through the gripping position with the supply side transfer cylinder 10 in a state where the claw 22b of the third gripping claw device 22 of the printing cylinder 21 is closed. To switch between the operation mode during single-sided printing and the operation mode during double-sided printing, the open / closed state of the second air supply solenoid valve 34 (see FIG. 7) provided in the supply-side switching device 25 is switched. Is done by. The operation of the solenoid valve 34 is controlled by the control device 14.

<Printing unit configuration>
As shown in FIG. 1, the printing unit 3 contains the above-mentioned supply-side transfer cylinder 10 and printing cylinder 21, the first to fourth inkjet heads 35 to 38 as the "printing unit" in the present invention, and ink. It includes an ink drying lamp 39 for solidification and a transport mechanism 40 for feeding the printed sheet 5.
The printing cylinder 21 has a function of sucking and transporting the sheet 5, is rotatably supported by the frame 3a, and rotates in synchronization with the supply-side transfer cylinder 10 and other cylinders. The printing cylinder 21 according to this embodiment is a so-called triple cylinder, and has transport surfaces 41 at three positions in the rotation direction. These transport surfaces 41 are formed by the outer peripheral surfaces of the printing cylinder 21, and are provided at positions where the printing cylinder 21 is divided into three equal parts in the rotational direction when viewed from the axial direction. An outer peripheral notch 42 is provided between the transport surfaces 41 adjacent to each other, and the above-mentioned third gripping claw device 22 is provided.

The first to fourth inkjet heads 35 to 38 and the ink drying lamp 39 are arranged side by side in this order on the peripheral side of the printing cylinder 21 and on the downstream side in the sheet transport direction from the supply side transport cylinder 10. ing.
The first to fourth inkjet heads 35 to 38 eject ink droplets onto the sheet 5 for printing. Although not shown, these first to fourth inkjet heads 35 to 38 each include a plurality of nozzles arranged in the axial direction of the printing cylinder 21.

The ink drying lamp 39 is for curing the ink applied to the sheet 5 by the first to fourth inkjet heads 35 to 38. The ink drying lamp 39 irradiates the sheet 5 with infrared rays or ultraviolet rays. The temperature of the ink rises when it is irradiated with infrared rays or ultraviolet rays, and the ink dries (solidifies).

<Structure of transfer mechanism of printing unit>
The transport mechanism 40 is configured by using a plurality of bodies and a reversing swing device 31. The plurality of cylinders include a discharge cylinder 32 that receives the sheet 5 from the printing cylinder 21, a discharge side transfer cylinder 43 that receives the sheet 5 from the discharge cylinder 32, and a double cylinder 44 before inversion. The discharge-side transfer cylinder 43, the inversion front double cylinder 44, and the inversion swing device 31 constitute an inversion portion 45 in which the front and back of the sheet 5 are inverted in the printing unit 3, although details will be described later. The discharge cylinder 32, the discharge side transfer cylinder 43, and the reverse front double cylinder 44 are rotatably supported by the frame 3a, respectively, and rotate in synchronization with the supply side transfer cylinder 10 and the printing cylinder 21. Further, the reversing swing device 31 swings in synchronization with the discharge cylinder 32, the discharge side transfer cylinder 43, the reverse pre-reversal cylinder 44, and the like.

The discharge cylinder 32 is arranged on the downstream side in the sheet transport direction from the first to fourth inkjet heads 35 to 38 and on the upstream side in the sheet transport direction from the supply side transfer cylinder 10. Although the details will be described later, the discharge cylinder 32 has a function of receiving the sheet 5 from the third gripping claw device 22 of the printing cylinder 21 and a function of releasing the sheet 5 on the downstream side in the transport direction.
As shown in FIG. 3, the discharge cylinder 32 and the discharge side transfer cylinder 43 are provided with one set of gripping claw devices 33 and 46, respectively, for delivering the sheet 5. The reversing front double cylinder 44 is a so-called double cylinder that can be provided with two transport surfaces, but is provided with one set of gripping claw devices 47.

These grip claw devices 33, 46, 47 are equivalent to the second and third grip claw devices 17, 22 described above, and as shown in FIG. 3, centering on the claw shafts 33a, 46a, 47a, respectively. It is provided with a plurality of swinging claws 33b, 46b, 47b and cam followers 33c, 46c, 47c. In the following, the gripping claw device 33 of the discharge cylinder 32 is referred to as a "fourth gripping claw device 33", and the gripping claw device 46 of the discharge side transfer cylinder 43 is referred to as a "fifth gripping claw device 46". Further, the gripping claw device 47 of the double body 44 before reversal is referred to as a "sixth gripping claw device 47".

<Structure of the 4th grip claw device of the discharge cylinder>
The fourth gripping claw device 33 of the discharge cylinder 32 rotates with respect to the receiving cam 51 provided on the frame 3a and the first and second delivery cams 52 and 53, and the cam follower 33c rotates with respect to these cams. It is driven by being pushed by 51-53. The cam followers 33c are also pressed against these cams 51 to 53 by the spring force of a spring member (not shown).

The claw 33b of the fourth grip claw device 33 is opened by the cam follower 33c being pushed by the receiving cam 51 or the delivery cam 52 of the first or the second delivery cam 53, and by exceeding these cams 51 to 53. close.
The receiving cam 51 and the second delivery cam 53 are fixed to the frame 3a. The receiving cam 51 is provided at a position where the claw 33b of the fourth gripping claw device 33 opens and closes when receiving the sheet 5 from the third gripping claw device 22 of the printing cylinder 21. The second delivery cam 53 is provided at a position where the claw 33b opens and closes when the sheet 5 is discharged to the discharge belt 54 of the delivery unit 4, which will be described later.

The first delivery cam 52 is swingably supported by the frame 3a around the support shaft 52a, and is shown by a solid line by interlocking with the discharge body side link mechanism 55 connected to the swing end. It is positioned at either the retracted position or the protruding position indicated by the alternate long and short dash line. The discharge body side link mechanism 55 has a first link 55a whose one end is rotatably connected to the first delivery cam 52 and one end rotatably connected to the other end of the first link 55a. It is configured by a second link 55b connected to. The other end of the second link 55b is fixed to the discharge body side drive shaft 56, and is connected to the discharge side switching device 61 (see FIG. 4) described later via the discharge body side drive shaft 56. .. The discharge cylinder side drive shaft 56 extends in a direction parallel to the axis of the discharge cylinder 32, and is rotatably supported by the frame 3a.

Although the details will be described later, the discharge side switching device 61 is positioned and held at the retracted position during single-sided printing, and is alternately positioned at the retracted position and the protruding position for each rotation of the ejector 32 during double-sided printing. When the first delivery cam 52 is positioned at the retracted position during double-sided printing, it means that the fourth grip claw device 33 holds the sheet 5 printed on both sides, and the first delivery cam 52 is used. When the cam 52 is positioned at the protruding position, it is a case where the sheet 5 printed on only one side is held.
When the first delivery cam 52 is positioned at the protruding position, the fifth grip claw device 46 of the discharge side transfer cylinder 43, which will be described later, receives the sheet 5 from the fourth grip claw device 33 of the discharge cylinder 32.

<Structure of the fifth grip claw device on the discharge side>
The fifth gripping claw device 46 of the discharge side transfer cylinder 43 rotates with respect to the receiving cam 62 (see FIG. 3) and the delivering cam 63 provided on the frame 3a, and the cam follower 46c rotates with respect to these cams 62 and 63. Driven by being pushed by. The claw 46b of the fifth gripping claw device 46 opens when the cam follower 46c is pushed by the receiving cam 62 or the delivering cam 63, and closes when the cam follower 46c exceeds these cams 62 and 63. The cam followers 46c are also pressed against the cams 62 and 63 by the spring force of a spring member (not shown).

The delivery cam 63 is fixed to the frame 3a. The delivery cam 63 is a position at which the claw 46b opens and closes when the sheet 5 is delivered to the fifth grip claw device 46 of the discharge side transfer cylinder 43 of the reverse front double cylinder 44 described later by the sixth grip claw device 47. It is provided in.
The receiving cam 62 is rotatably supported by the frame 3a around the shaft portion 62a located on the same axis as the discharge side transfer cylinder 43, and will be described later via the transfer side link mechanism 64. It is connected to the discharge side switching device 61.

In the body-side link mechanism 64, the first link 64a, one end of which is rotatably connected to the receiving cam 62, and the other end of the first link 64a are rotatably connected. It is composed of a second link 64b. The other end of the second link 64b is fixed to the body-side drive shaft 65. The transfer side drive shaft 65 extends in a direction parallel to the axis of the discharge side transfer body 43, and is rotatably supported by the frame 3a.
Although the details will be described later, the discharge side switching device 61 positions the receiving cam 62 at either the non-receiving position shown by the solid line or the receiving position shown by the alternate long and short dash line. The discharge side switching device 61 positions and holds the receiving cam 62 at the non-receiving position during single-sided printing, and alternately positions the receiving cam 62 at the non-receiving position and the receiving position for each rotation of the discharging side transfer cylinder 43 during double-sided printing.

When the receiving cam 62 is positioned at the non-receiving position, the claw 46b makes an avoidance operation. This avoidance operation is an operation in which the claw 46b opens earlier than the receiving timing of the discharge cylinder 32 with the fourth gripping claw device 33, and passes through the gripping position with the discharge cylinder 32 in the opened state. In this case, the claw 46b avoids contact with the sheet 5 held by the fourth gripping claw device 33 of the discharge cylinder 32.
When the receiving cam 62 is positioned at the receiving position, the fifth gripping claw device 46 performs the receiving operation. This receiving operation is an operation of receiving the sheet 5 from the fourth gripping claw device 33 of the discharging cylinder 32.

<Configuration of discharge side switching device>
As shown in FIG. 4, the discharge side switching device 61 has a discharge body side drive unit 66 for driving the discharge body side drive shaft 56 described above and a transfer body side drive for driving the transfer body side drive shaft 65. It is provided with a part 67. In this embodiment, the discharge side switching device 61 corresponds to the "discharge body side distribution means" in the present invention.

<Structure of drive unit on the discharge body side>
The discharge body side drive unit 66 is a rotary first lever 71 in which the discharge body side drive shaft 56 is fixed to an intermediate portion and is rotatably supported by one end of the first lever 71. A cam follower 72, a first spring device 74 rotatably connected to one end of the first lever 71 via a connecting pin 73, and a pin 75 provided at the other end of the first lever 71. It is provided with a first air cylinder device 76 for pushing, a disc-shaped first cam 77 to which the first cam follower 72 is rotated, and the like.

The first spring device 74 is swingably supported by the frame 3a via a bracket (not shown), and the compression coil spring 74a in the direction in which the first cam follower 72 is pressed against the first cam 77. One end of the first lever 71 is urged by the spring force.
The first air cylinder device 76 has an air cylinder 76a and a piston rod 76b. The air cylinder 76a is supported by the frame 3a via the bracket 76c. The tip of the piston rod 76b is in contact with the pin 75.

In the first air cylinder device 76, when air is supplied, as shown by a solid line in FIG. 4, the piston rod 76b protrudes from the air cylinder 76a, and the other end of the first lever 71 is pressed. It is pressed against the first stopper 78 to hold the first lever 71 in the non-delivery position. Further, the first air cylinder device 76 is in a state where the swing of the first lever 71 is not regulated by cutting off the supply of air. The supply and demand of air is switched by the first solenoid valve 79 for an air cylinder shown in FIG. 7. The operation of the solenoid valve 79 is controlled by the control device 14. Air is supplied to the first air cylinder device 76 during single-sided printing, and the air supply is cut off during double-sided printing.

The first cam 77 is provided with a cam shaft 80 at the center of the shaft, and rotates integrally with the cam shaft 80. The cam shaft 80 is rotatably supported by the frame 3a in a state of extending parallel to the axes of the discharge cylinder 32 and the discharge side transfer cylinder 43. Further, the cam shaft 80 is provided in a state in which the second cam 81 of the transmission body side drive unit 67, which will be described later, and the driven side gear 82 are integrally rotated. The driven side gear 82 meshes with the drive side gear 83 and rotates integrally with the drive side gear 83. The drive-side gear 83 is driven and rotated by a drive device (not shown) that drives the discharge cylinder 32 and the discharge-side transfer cylinder 43.

The first and second cams 77 and 81 rotate in synchronization with the discharge cylinder 32 and the discharge side transfer cylinder 43 by transmitting rotation from the drive side gear 83 to the driven side gear 82.
The first cam 77 has a large-diameter cam surface 77a shown by a solid line in FIG. 4 and a small-diameter cam surface 77b shown by a two-dot chain line. By transposing the first cam follower 72 to the large-diameter cam surface 77a, the first lever 71 is positioned at the non-delivery position shown by the solid line in FIG. 4, and the first lever 71 is positioned as shown by the solid line in FIG. The delivery cam 52 is positioned at the retracted position.

By transposing the first cam follower 72 to the small-diameter cam surface 77b, the first lever 71 is positioned at the delivery position shown by the alternate long and short dash line in FIG. 4, and the first delivery cam 52 is shown in FIG. It is positioned at the protruding position as shown by the alternate long and short dash line.
In the discharge cylinder side drive unit 66, air is supplied to the first air cylinder device 76 during single-sided printing, and the first lever 71 is held in the non-delivery position. By holding the first lever 71 in the non-delivery position in this way, the first delivery cam 52 of the discharge cylinder 32 is held in the retracted position, and the seat 5 is discharged in a state of being held in the discharge cylinder 32. It passes through the position where it is replaced with the side body 43, and is released on the discharge belt 54.

On the other hand, during double-sided printing, the air supply is cut off, and the first cam follower 72 is pressed against the first cam 77 by the spring force of the first spring device 74, so that the first cam 77 rotates. The first lever 71 reciprocates between the non-delivery position and the delivery position. At this time, the first lever 71 reciprocates once for each rotation of the discharge cylinder 32.
At the time of double-sided printing, the first cam follower 72 is transferred to the large-diameter cam surface 77a in the process in which the sheet 5 printed on both sides is conveyed by the discharge cylinder 32. Further, during double-sided printing, the first cam follower 72 is transferred to the small-diameter cam surface 77b in the process in which the sheet 5 printed on only one side is conveyed by the discharge cylinder 32.

<Structure of drive unit on the body side>
The transporter side drive unit 67 includes a second lever 91 in which the transporter side drive shaft 65 is fixed to one end, and a rotary second lever rotatably supported by the other end of the second lever 91. Cam follower 92, a second spring device 94 rotatably connected to an intermediate portion of a second lever 91 via a connecting pin 93, and a first end portion fixed to a body-side drive shaft 65. A lever 95 of 3, a second air cylinder device 96 connected to the other end of the third lever 95, a disc-shaped second cam 81 to which the second cam follower 92 is transferred, and the like are provided. There is.

The second spring device 94 is swingably supported by the frame 3a via a bracket (not shown), and the compression coil spring 94a is supported in a direction in which the second cam follower 92 is pressed against the second cam 81. One end side of the second lever 91 is urged by the spring force.
The second air cylinder device 96 has an air cylinder 96a and a piston rod 96b. The air cylinder 96a is supported by the frame 3a via the bracket 96c. The tip of the piston rod 96b is in contact with a pin 97 provided at the other end of the third lever 95.

In the second air cylinder device 96, when air is supplied, as shown by a solid line in FIG. 4, the piston rod 96b protrudes from the air cylinder 96a, and the other end of the third lever 95 is pressed. It is pressed against the second stopper 98 to hold the third lever 95 in the non-delivery position shown by the solid line. Further, the second air cylinder device 96 is in a state where the swing of the third lever 95 is not regulated by cutting off the supply of air. The supply and demand of air is switched by the second solenoid valve 99 for an air cylinder shown in FIG. 7. The operation of the solenoid valve 99 is controlled by the control device 14. Air is supplied to the second air cylinder device 96 during single-sided printing, and the air supply is cut off during double-sided printing.

The second cam 81 has a large-diameter cam surface 81a shown by a solid line in FIG. 4 and a small-diameter cam surface 81b shown by a two-dot chain line. When the second cam follower 92 is transferred to the large-diameter cam surface 81a, the second lever 91 is positioned at the non-delivery position shown by the solid line in FIG. 4, and is for receiving as shown by the solid line in FIG. The cam 62 is positioned in the non-receipt position.
By transposing the second cam follower 92 to the small-diameter cam surface, the second lever 91 is positioned at the delivery position shown by the alternate long and short dash line in FIG. 4, and is for receiving as shown by the alternate long and short dash line in FIG. The cam 62 is positioned at the receiving position.

In the transfer cylinder side drive unit 67, air is supplied to the second air cylinder device 96 during single-sided printing, and the second and third levers 91 and 95 are held in non-delivery positions. On the other hand, during double-sided printing, the air supply is cut off, and the second cam follower 92 is urged by the spring force of the second spring device 94 and pressed against the second cam 81, so that the second lever 91 is pressed. As the second cam 81 rotates, it reciprocates between the non-delivery position and the delivery position. At this time, the second lever 91 reciprocates once for each rotation of the discharge side transfer cylinder 43.

During double-sided printing, the second cam follower 92 is transferred to the large-diameter cam surface 81a in the process in which the sheet 5 printed on both sides is conveyed by the discharge cylinder 32. Therefore, during double-sided printing, when the sheet 5 after double-sided printing is held on the discharge cylinder 32, the sheet 5 is not passed from the discharge cylinder 32 to the discharge side transfer cylinder 43, and the discharge belt 54 Is discharged to.
Further, during double-sided printing, the second cam follower 92 is transferred to the small-diameter cam surface 81b in the process in which the sheet 5 printed on only one side is conveyed by the discharge cylinder 32. Therefore, at the time of double-sided printing, when the discharge cylinder 32 holds the sheet 5 on which only one side is printed, the sheet 5 is delivered from the discharge cylinder 32 to the discharge side transfer cylinder 43.

<Structure of the 6th grip claw device of the double body before reversal>
A set of sixth gripping claw devices 47 of the inverting front double cylinder 44 rotates with respect to a receiving cam (not shown) and a delivery cam (not shown) provided on the frame 3a, and the cam follower 47c is moved. It is driven by being pushed by these cams. The receiving cam and the delivering cam on the side of the double body before inversion are fixed to the frame 3a. The cam follower 47c is also pressed against these cams by the spring force of a spring member (not shown).

The receiving cam on the double body side before reversing is provided at a position where the claw 47b opens and closes when the sixth grip claw device 47 receives the sheet 5 from the fifth grip claw device 46 on the discharge side transfer cylinder 43. .. The sheet 5 delivered to the pre-inverted double cylinder 44 is printed on only one side. The sheet 5 is held by the pre-inverted double cylinder 44 in a state where the printed surface faces the pre-reversed double cylinder 44.
The delivery cam on the side of the double body before reversing is attached to the reversing claw device 101 of the reversing swing device 31 (see FIG. 2) whose other end of the sheet 5 whose one end is held by the sixth grip claw device 47. It is provided at a position where the claw 47b opens and closes when it is gripped.

<Structure of the grip claw of the reversing swing device>
As shown in FIG. 2, the reversing swing device 31 is supported by the second rotating shaft 102 and swings. The second rotation shaft 102 is rotatably supported by the frame 3a and rotates in synchronization with the rotation of the pre-reversal double cylinder 44. The second rotation shaft 102 rotates forward and reverses once by a predetermined rotation angle each time the pre-reversal double cylinder 44 rotates 1/2. As the second rotation shaft 102 rotates, the reversing swing device 31 swings between the receiving position close to the reversing front double cylinder 44 and the delivery position close to the printing cylinder 21.

At the swinging end of the reversing swing device 31, a reversing grip claw device 101 that holds the end of the sheet 5 is provided. The reversing grip claw device 101 includes a claw 101a and a claw stand 101b, and holds the end portion of the sheet 5 in the grip when the reversing swing device 31 is positioned at the receiving position. This end portion is an end portion on the upstream side in the transport direction of the sheet 5 held by the double cylinder 44 before inversion. The reversing swing device 31 swings toward the printing cylinder 21 with the reversing grip claw device 101 holding the sheet 5. By swinging the reversing swing device 31 in this way, the front and back sides of the sheet 5 are reversed, and the printed surface faces the printing cylinder 21.
Then, the reversing grip claw device 101 delivers the sheet 5 to the third grip claw device 22 of the printing cylinder 21 in a state where the reversing swing device 31 is positioned at the delivery position.

That is, the reversing swing device 31 flips the front and back of the sheet 5 in the middle of transportation, and delivers the sheet 5 with the front and back reversed to the third gripping claw device 22 of the printing cylinder 21 to supply the sheet 5 to the printing cylinder 21.
In this embodiment, the reversing grip claw device 101 of the reversing swing device 31, the fifth grip claw device 46 of the discharge side transfer cylinder 43 described above, and the sixth grip claw device 47 of the reversing front double cylinder 44. Corresponds to the "reversing part holding device" in the present invention.

<Composition of delivery section>
As shown in FIGS. 1 and 5, the delivery unit 4 of the printing machine 1 has a discharge belt 54 that receives the sheet 5 from the discharge cylinder 32, a discharge pile 111 to which the sheet 5 is sent by the discharge belt 54, and the discharge. A belt-type transfer device 113 that connects one end of the pile 111 and the discharge belt 54 is provided.
The discharge belt 54 is composed of an endless belt, and is bridged between an upstream sprocket 54a located near the lower side of the discharge cylinder 32 and a downstream sprocket 54b located near the discharge pile 111 from the lower vicinity of the discharge cylinder 32. It extends substantially horizontally to the side opposite to the printing cylinder 21. The discharge belts 54 according to this embodiment are provided at positions where the discharge cylinder 32 and the discharge pile 111 are lined up at predetermined intervals in the axial direction of the discharge cylinder 32. These discharge belts 54 are each driven and rotated by a drive device that drives the discharge cylinder 32 and other cylinders. The sheet 5 is placed on these discharge belts 54, and is conveyed by the discharge belt 54 moving (rotating).

As shown in FIG. 5, the discharge pile 111 has a mounting surface 114 on which the printed sheet 5 is mounted, and is moved in the vertical direction by an elevating device 115 connected to the four corners when viewed from above. It is supported to be movable. The elevating device 115 supports one end of the discharge pile 111 on the downstream side in the sheet transport direction (left side in FIGS. 5 and 6) by two first chains 116, and the other end on the upstream side in the sheet transport direction. A configuration is adopted in which the portion is supported by two second chains 117.

The first chain 116 is wound around the first sprocket 118a of the drive shaft 118 located above and extends in the vertical direction. A weight 119 is provided at an end of the first chain 116 opposite to the end connected to the discharge pile 111.
The second chain 117 is wound around the sprocket 120a of the driven shaft 120 located above, extends downstream in the seat transport direction, and is wound around the second sprocket (not shown) of the drive shaft 118. .. A weight 119 is also provided at an end of the second chain 117 opposite to the end connected to the discharge pile 111.

These first and second chains 116 and 117 move by driving the drive shaft 118 by a motor 121 connected to one end of the drive shaft 118. As the first and second chains 116 and 117 move, the discharge pile 111 moves upward or downward. The discharge pile 111 according to this embodiment moves in the vertical direction with the position indicated by the alternate long and short dash line in FIG. 5 as the uppermost position. FIG. 1 is drawn with the discharge pile 111 located at the uppermost position. As shown in FIG. 1, this top position is a position horizontally aligned with the discharge cylinder 32.

In the vicinity of the discharge pile 111 located at the uppermost position, a backing plate 122 in which the tip on the downstream side in the transport direction of the sheet 5 hits, and a swing-type gathering member 123 that pushes the rear end on the upstream side in the transport direction of the sheet 5 Horizontal alignment (not shown) is provided. The backing plate 122 can be moved in the transport direction of the sheet 5. The lateral alignment is for regulating the position of the end portion of the seat 5 in the left-right direction. The left-right direction referred to here is the axial direction of the discharge cylinder 32.

<Sampling pile configuration>
The sampling pile 112 is for taking out the sheet 5 for sampling, and as shown in FIG. 5, is formed in a dish shape open upward and is supported by the frame 4a of the delivery unit 4. .. As shown in FIG. 6, the width of the sampling pile 112 in the left-right direction is larger than the width W of the maximum size sheet 5 that can be used by the printing machine 1 in the left-right direction.
The bottom 112a of the sampling pile 112 is inclined so as to be gradually positioned upward from the upstream end in the sheet transport direction toward the downstream side (left side in FIG. 5).

Between the sampling pile 112 and the above-mentioned discharge belt 54, a belt-type transport device 113 for pulling up the sheet 5 from the discharge belt 54 and feeding it diagonally upward is provided.
As shown in FIGS. 5 and 6, the transport device 113 includes a plurality of first distribution members 131 located in the vicinity of the discharge belt 54, and a predetermined length obliquely upward from the first distribution member 131. From the plurality of first transport belts 132 extending so much, the plurality of second distribution members 133 located near the upper ends of these first transport belts 132, and these second distribution members 133. A plurality of second transport belts 134 extending obliquely upward and a third transport belt 135 extending in the horizontal direction from the vicinity of the second distribution member 133 are provided. The first to third transport belts 132, 134, and 135 are respectively endless belts, and like the discharge belt 54, power is transmitted from the drive device to rotate the first to third transport belts 132, 134, and 135.

The plurality of first distribution members 131 are for distributing the transport destination of the sheet 5 mounted on the discharge belt 54 to one of the discharge pile 111 and the sampling pile 112. As shown in FIG. 6, these first distribution members 131 are arranged at positions adjacent to the plurality of discharge belts 54 when viewed from above, and are supported by the lower drive shaft 136. The lower drive shaft 136 extends in a direction parallel to the axis of the discharge cylinder 32 and is connected to the drive motor 137. The operation of the motor 137 is controlled by the control device 14.

The first distribution member 131 swings between the normal position shown by the solid line in FIG. 5 and the pull-up position shown by the alternate long and short dash line by rotating the lower drive shaft 136. When the sheet 5 is conveyed by the discharge belt 54 while the first distribution member 131 is positioned at the pull-up position, the sheet 5 moves upward along the first distribution member 131, and the first It is placed on the transport belt 132 of 1. In this embodiment, the first distribution member 131 corresponds to the "discharge belt side distribution means" in the present invention.

As shown in FIG. 6, the plurality of first and second transport belts 132 and 134 are arranged side by side in the axial direction of the discharge cylinder 32.
The second distribution member 133 is arranged at a position adjacent to the first and second transport belts 132 and 134 when viewed from above, and is supported by the upper drive shaft 138. The upper drive shaft 138 extends in a direction parallel to the axis of the discharge cylinder 32 and is connected to the drive motor 139. The operation of the motor 139 is controlled by the control device 14.

As the upper drive shaft 138 rotates, the second distribution member 133 swings between the normal position shown by the solid line in FIG. 5 and the bypass position shown by the alternate long and short dash line in FIG. When the second distribution member 133 is positioned at the normal position, the sheet 5 conveyed by the first transfer belt 132 passes over the second distribution member 133 and is fed to the second transfer belt 134. Then, it is discharged to the sampling pile 112 by the second transport belt 134. By positioning the second distribution member 133 in the bypass position, the sheet 5 conveyed by the first transfer belt 132 is sent under the second distribution member 133 to the third transfer belt 135. ..

The third transport belt 135 crosses the delivery section 4 through the space between the discharge pile 111 and the sampling pile 112, and the sheet 5 is used as a post-process device (not shown) adjacent to the delivery section 4. send. As a device for this post-process, for example, there is a folding device.

<Control system configuration>
The control device 14 is composed of a CPU (Central Processing Unit), and as shown in FIG. 7, the print mode selection switch 141 and the rotary encoder 142 as a phase detection device are connected, and the first to first ones are The fourth inkjet head 35 to 38, the continuous supply valve 11 and the intermittent supply valve 12 of the feeder unit 2, the first and second air supply solenoid valves 26 and 34 of the supply side switching device 25, and the discharge side switching. The first and second air cylinder solenoid valves 79 and 99 of the device 61, the lifting device motor 121, the first and second sorting member motors 137, 139 and the like are connected. The print mode selection switch 141 is for switching between the single-sided printing mode in which single-sided printing is performed and the double-sided printing mode in which double-sided printing is performed in the printing machine 1.

<Explanation of operation when printing on one side>
Next, the operation of the printing machine 1 according to this embodiment will be described.
When an operator (not shown) operates the print mode selection switch 141 to select the single-sided printing mode, the control device 14 controls the operation of various devices in the single-sided printing mode. In the single-sided printing mode, the sheet 5 is continuously supplied from the feeder unit 2 to the printing unit 3. That is, the second grip claw device 17 of the supply side transfer cylinder 10 delivers the sheet 5 to the third grip claw device 22 of the printing cylinder 21 each time the supply side transfer cylinder 10 rotates. The sheet 5 conveyed to the printing cylinder 21 in this way is printed by passing in the vicinity of the first to fourth inkjet heads 35 to 38. Printing is performed by the control device 14 identifying the position of the sheet 5 based on the phase signal of the rotary encoder 142.

The ink printed on the sheet 5 is solidified by the sheet 5 being conveyed in the vicinity of the ink drying lamp 39.
After that, the sheet 5 is replaced from the third grip claw device 22 of the printing cylinder 21 to the fourth grip claw device 33 of the discharge cylinder 32, and is conveyed by the discharge cylinder 32.
In the single-sided printing mode, the discharge side switching device 61 positions the first delivery cam 52 of the discharge cylinder 32 in the retracted position, and the receiving cam 62 of the discharge side transfer cylinder 43 is positioned in the non-receive position. ing. Therefore, the sheet 5 held by the discharge cylinder 32 is discharged onto the discharge belt 54 without being delivered to the discharge side transfer cylinder 43.

Then, since the first distribution member 131 is normally located at the normal position by the control device 14 controlling the operation of the motor 137, the sheet 5 is placed above the discharge pile 111 by the discharge belt 54. It is discharged and loaded on the discharge pile 111. At the start of operation of the printing machine 1, the operation of the motor 137 is controlled by the control device 14, and the first distribution member 131 is positioned at the pull-up position and the second distribution member 133 is positioned at the normal position. The sheet 5 is pulled up by the belt type transfer device 113 and discharged to the sampling pile 112. Further, when the printed sheet 5 is sent to the apparatus in the subsequent process, the first distribution member 131 is positioned at the pull-up position and the second distribution member 133 is positioned at the bypass position, whereby the sheet 5 is conveyed by the third transfer belt 135.

<Explanation of operation when printing on both sides>
When the operator operates the print mode selection switch 141 to select the double-sided printing mode, the control device 14 controls the operation of various devices in the double-sided printing mode. In the double-sided printing mode, the sheet 5 is intermittently supplied from the feeder unit 2 to the printing unit 3. That is, the second grip claw device 17 of the supply side transfer cylinder 10 delivers the sheet 5 to the third grip claw device 22 of the printing cylinder 21 every time the supply side transfer cylinder 10 rotates twice. The new sheet 5 conveyed to the printing cylinder 21 in this way is printed on the surface by being conveyed by the printing cylinder 21 and sent to the discharge cylinder 32, as in the case of single-sided printing.

In the double-sided printing mode, the first and second cam followers 72 and 92 of the discharge side switching device 61 are transferred to the first and second cams 77 and 81, and the first and second levers 71 and 91 are first. And swings following the second cams 77 and 81. In this double-sided printing mode, when the new sheet 5 is conveyed to the discharge cylinder 32, the discharge side switching device 61 positions the first delivery cam 52 of the discharge cylinder 32 at the protruding position and the discharge side transfer cylinder 43. Position the receiving cam 62 of the above at the receiving position. Therefore, the sheet 5 is delivered from the discharge cylinder 32 to the discharge side transfer cylinder 43.

Then, the sheet 5 printed only on the front surface is handed over from the discharge side transfer cylinder 43 to the inversion front double cylinder 44, and further, the front and back sides are inverted by the inversion swing device 31 and the back surface is exposed. It is delivered to the third grip claw device 22 of 21. The third gripping claw device 22 that holds the sheet 5 passes through the gripping position with the supply side transfer cylinder 10 in a state where the sheet 5 is gripped. At this time, the second gripping claw device 17 of the supply-side transfer cylinder 10 passes in the vicinity of the third gripping claw device 22 with the claw 17b open.

The sheet 5 held in the third gripping claw device 22, in other words, the sheet 5 held in the printing cylinder 21 with the back surface exposed, is the sheet 5 of the first to fourth inkjet heads 35 to 38. Printing is applied to the back side when passing in the vicinity. At this time, the control device 14 discriminates between the new sheet 5 and the sheet 5 on which the surface is printed based on the phase signal of the rotary encoder 142, and prints according to each sheet 5.

The sheet 5 printed on the back surface (both sides) passes near the ink drying lamp 39 and is sent to the discharge cylinder 32 in a state where the ink is solidified. When the sheet 5 printed on both sides in the double-sided printing mode is conveyed by the discharge cylinder 32, the discharge side switching device 61 positions the first delivery cam 52 in the retracted position and discharges the discharge side cylinder. The receiving cam 62 of 43 is positioned at the non-receiving position. Therefore, the sheet 5 printed on both sides is discharged from the discharge cylinder 32 to the discharge belt 54. The sheet 5 is also discharged to one of the discharge pile 111, the sampling pile 112, and the device in the subsequent process, as in the case of single-sided printing.

<Explanation of the effect according to the embodiment>
According to this embodiment, since the printed sheet 5 is sent from the printing cylinder 21 to the discharge belt 54 via one discharge cylinder 32, the position of the discharge belt 54 without changing the height of the printing cylinder 21. Is higher than that of the discharge belt described in Patent Document 1. By providing the discharge belt 54 at a high position in this way, the uppermost position of the discharge pile 111 is raised, and the number of sheets 5 that can be loaded on the discharge pile 111 is increased.
Therefore, according to this embodiment, although the height of the entire printing machine is kept low, a large amount of sheets 5 are loaded on the discharge pile 111, and the printed sheets 5 can be easily taken out. Can be provided.
In the printing machine 1 of the present application capable of double-sided printing, a reversing unit 45 such as a pre-reversing double cylinder 44 is configured below the printing cylinder 21, or a printing unit is configured above the reversing unit 45. However, the discharge pile 111 is high.

In the printing machine 1 according to this embodiment, either the sampling pile 112 arranged above the discharge pile 111 or the sampling pile 112 or the discharge pile 111 is the destination of the sheet 5 transported by the discharge belt 54. It is provided with a first distribution member 131 (discharge belt side distribution means) for distribution to one side.
In this printing machine 1, the printed sheet 5 can be discharged to the sampling pile 112. The sampling pile 112 is located above the discharge pile 111. Therefore, the operator can easily confirm the presence or absence of the sheet 5 on the sampling pile 112, and the sheet 5 can be easily taken out from the sampling pile 112. Therefore, according to this embodiment, it is possible to provide a printing machine capable of promptly confirming the printing result.

In the printing press 1 according to this embodiment, the reversing portion 45 (discharging side transfer cylinder 43, reversing front double cylinder 44, and reversing swing) delivers the sheet 5 received from the discharging cylinder 32 to the printing cylinder 21 with the front and back reversed. A device 31) and a discharge cylinder side sorting means (discharge side switching device 61) that distributes the destination of the sheet 5 transported by the discharge cylinder 32 to either the discharge belt 54 or the reversing portion 45. There is. Therefore, according to this embodiment, since printing can be performed on both the front and back surfaces of the sheet 5, a large amount of the sheet 5 printed on both the front and back surfaces is loaded on the discharge pile 111.

In the above-described embodiment, an example in which printing is performed by the first to fourth inkjet heads 35 to 38 is shown. However, the present invention is not limited to such a limitation, and the printing may be digital printing such as a toner type or printing using a plate.
Further, in the above-described embodiment, an example is shown in which the second to sixth grip claw devices 17, 22, 33, 46, 47 are used to hold the seat 5 on each body. However, when the sheet 5 is held by each body, a configuration in which the sheet 5 is attracted and held can be adopted.

1 ... Printing machine, 3 ... Printing unit, 5 ... Sheet, 10 ... Supply side transfer cylinder (sheet supply device), 17 ... Second grip claw device, 22 ... Third grip claw device (print cylinder holding device), 21 ... printing cylinder, 22 ... third grip claw device, 31 ... reversing swing device, 32 ... discharge cylinder, 33 ... fourth grip claw device, 35 ... first inkjet head, 36 ... second inkjet head, 37 ... 3rd inkjet head, 38 ... 4th inkjet head, 43 ... discharge side transfer cylinder, 44 ... reversing front double cylinder, 45 ... reversing part, 46 ... 5th grip claw device, 47 ... 6th grip Claw device, 54 ... Discharge belt, 61 ... Discharge side switching device, 111 ... Discharge pile, 112 ... Sampling pile, 114 ... Loading surface, 131 ... First distribution member, 101 ... Reversing grip claw device.

Claims (2)

A sheet supply device that supplies sheets as print media one by one, and
A printing cylinder holding device for holding a sheet supplied by the sheet feeding device, and a printing cylinder for transporting the sheet,
A printing unit that prints on the sheet conveyed by the printing cylinder, and
A discharge cylinder provided on the downstream side in the sheet transport direction from the printing unit and having a function of receiving the sheet from the printing cylinder holding device and a function of releasing the sheet on the downstream side in the transport direction.
A discharge pile with a loading surface on which the printed sheet is loaded,
A discharge belt that receives a sheet from the discharge cylinder and conveys it to the discharge pile .
It includes a reversing part holding device having a function of receiving a sheet transported by the discharge cylinder and a function of holding and transporting the sheet, and includes a discharge side transfer cylinder, a reversing front double cylinder, and a reversing swing device during transportation. The front and back of the sheet are inverted, and the inverted sheet is delivered to the printing cylinder holding device and supplied to the printing cylinder.
The discharge cylinder side distribution means for distributing the transfer destination of the sheet conveyed by the discharge cylinder to either the discharge belt or the reversing portion is provided.
The discharge cylinder is a printing machine configured as a single cylinder equipped with a set of gripping claw devices for delivering and receiving sheets. In the printing machine according to claim 1.
A sampling pile placed above the discharge pile and
A printing machine comprising: a discharge belt side sorting means for distributing a destination of a sheet conveyed by the discharge belt to either the sampling pile or the discharge pile.

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