JP2010047338A - Paper delivering device, printing device, and air cylinder device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain an impact force when a cylinder rod of an air cylinder is stopped. <P>SOLUTION: A paper delivering device comprises a reciprocating type air cylinder 173, a first electromagnetic valve 181 moving to three positions of: an extrusion position for supplying or discharging compressed air to the air cylinder to extrude a cylinder rod; a suction position for supplying or discharging compressed air to the air cylinder to suck the cylinder rod; and a stop position for stopping supply or discharge of compressed air to the air cylinder, a second electromagnetic valve 182 moving to two positions, an extruded position for supplying or discharging compressed air to the air cylinder to extrude a cylinder rod, and an retracted position for supplying or discharging compressed air to the air cylinder to draw back the cylinder rod and provided with a throttle valve 182c on a compressed air discharging side of the air cylinder at each position, and control means for moving the first electromagnetic valve to the extruded position or the suction position, moving the second electromagnetic valve to the extrusion position or the retracted position, and moving the first electromagnetic valve to the stop position when a predetermined time has elapsed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a paper discharge device including a plurality of paper discharge bases for stacking and holding printed sheets, a printing machine including the paper discharge device, and a guide member that guides passage of a sheet in the paper discharge device, for example. The present invention relates to an air cylinder device for driving.

  Some printing presses include a paper discharge device provided with two paper discharge trays on the upstream side and the downstream side in the sheet conveyance direction (see, for example, Patent Document 1). Such a paper discharge device inspects the print quality of the printed sheet, and can discharge the normal paper with good printing and the damaged paper with poor printing into two paper discharge trays. In addition, this paper discharge device supports high-speed printing (for example, 3 to 5 sheets / second), and can discharge sheets that are alternately printed on two paper discharge trays. In addition, this paper discharge device can discharge a printed sheet to two paper discharge trays when the number of prints that do not fit on one paper discharge tray is performed.

  In the paper discharge device, an air blowing means such as a fan or an air shower is disposed above the upstream paper discharge tray, and the sheet is pushed downward by wind force to assist the lowering of the sheet to the upstream paper discharge tray. ing. However, when the sheet is sent to the downstream discharge tray, the sheet is passed above the upstream discharge tray, so that the wind force of the blowing means acts on the sheet. In high-speed printing, even if the blowing means is stopped, the wind does not immediately stop, and the sheet cannot pass in time. As a result, there is a risk that the sheet sent to the downstream discharge tray passes below the predetermined passing area, and the back surface thereof comes into contact with a component such as a backing plate that aligns the paper on the upstream discharge tray and may be damaged. . In particular, when aluminum vapor deposition or PP film is laminated on the back surface of the sheet, scratches are conspicuous, and even if printing is good, it is treated as broken paper.

  Therefore, conventionally, in order to prevent a situation in which a sheet to be sent to the downstream discharge tray passes below a predetermined passing area at the upstream discharge tray, the sheet is provided so as to be able to appear above and below the upstream discharge tray. A guide member is provided. This guide member is selectively raised and lowered above the discharge tray on the upstream side by the air cylinder. And the mode corresponding to the printing form of a sheet | seat is set, and the air cylinder is operated about the mode which needs to operate a guide member (for example, refer patent document 2).

Japanese Patent Laid-Open No. 11-165931 JP 2008-137373 A

  By the way, in order to cope with the high-speed printing of the printing press, the cylinder rod of the air cylinder is moved at a high speed (for example, 4 m / second) at a short distance (for example, 300 mm). Become. And in order to improve the durability of the mechanism which makes the guide member appear and disappear, it is necessary to suppress the impact force when the cylinder rod is stopped. In Patent Document 2, the air cylinder is operated in a mode in which the guide member needs to be operated, but the durability according to the number of operation of the cylinder is improved only by reducing the use frequency of the air cylinder. Not.

  In order to suppress the impact force when the cylinder rod is stopped, it is conceivable to use a speed controller that changes the flow rate of air supplied to the air cylinder or a shock absorber that mechanically absorbs the impact. However, the speed controller throttles the supply or exhaust of the air cylinder when the cylinder rod stops, and releases the throttle of the supply or exhaust when the cylinder rod moves. On the other hand, the response is poor and it is not suitable for high-speed operation. Also, the shock absorber contacts the tip of the extended cylinder rod, and its position is above the upstream discharge tray, so when discharging a sheet to the upstream discharge tray. Get in the way. If the shock absorber is retracted from above the upstream discharge tray and an L-shaped bracket for contacting the shock absorber is provided at the tip of the cylinder rod, the cylinder rod is easily damaged by bending moment.

  The present invention has been made in view of the above, and after a plurality of discharge trays that stack and hold printed sheets are arranged along the sheet conveyance direction, a guide member that guides the sheets is made to appear and disappear. A paper discharge device capable of improving the durability of the mechanism, a printing machine equipped with the paper discharge device and capable of handling high-speed printing, and an impact force when the cylinder rod of the air cylinder is stopped An object of the present invention is to provide an air cylinder device capable of suppressing the above-mentioned problem.

  In order to achieve the above object, in the paper discharge device of the present invention, a plurality of paper discharge bases that stack and hold printed sheets are arranged along the sheet conveyance direction, and pass above the paper discharge base. In a paper discharge device in which a guide member is provided in an upper region of the paper discharge stand so as to be able to protrude and retract in a mode of guiding the sheet, the cylinder has a cylinder rod connected to the guide member, and is supplied and discharged by compressed air A return type air cylinder into and out of the cylinder rod, an extrusion position for supplying and discharging compressed air to and from the air cylinder in a mode of pushing out the cylinder rod, and a mode of drawing in the cylinder rod to the air cylinder. A first electromagnetic valve that moves in three directions: a retracted position for supplying and discharging compressed air, and a stop position for stopping the supply and discharge of compressed air to the air cylinder; In two modes, an extrusion position for supplying / discharging compressed air to / from the air cylinder in a manner of pushing a rod and a drawing position for supplying / discharging compressed air to / from the air cylinder in a manner of retracting the cylinder rod. And a second solenoid valve provided with a throttle valve on the compressed air discharge side of the air cylinder at each position, and the second solenoid valve moves the first solenoid valve to an extrusion position or a pull-in position. And a control means for moving the first solenoid valve to a stop position when a predetermined time has passed after the valve is moved to the push-out position or the pull-in position.

  In this paper discharge device, the first electromagnetic valve is moved to the push-out position or the pull-in position, and the second electromagnetic valve is moved to the push-out position or the pull-in position, whereby compressed air is supplied to the air cylinder by both the electromagnetic valves. The cylinder rod can be moved at high speed. Moreover, when the predetermined time has elapsed, the supply of compressed air by the first solenoid valve is stopped by moving the first solenoid valve to the stop position, and the cylinder rod is braked by the throttle valve of the second solenoid valve. Impact at the end of the rod stroke can be reduced. As a result, it is possible to improve the durability of the mechanism for projecting and retracting the guide member that guides the sheet passing above the sheet discharge table.

  In order to achieve the above object, in the printing machine of the present invention, a sheet feeding device that feeds out sheets one by one, a printing device that performs printing on the sheet fed from the sheet feeding device, A discharge device that discharges the sheet that has been printed by the printing device, and the discharge device includes a plurality of discharge trays that stack and hold the printed sheets along the conveyance direction of the sheet. A cylinder rod connected to the guide member in a printing machine in which a guide member is disposed in an upper region of the discharge table in a manner to guide the sheet that is disposed and passes above the discharge table. A reciprocating type air cylinder in which a cylinder rod is inserted / extracted by supplying / discharging compressed air, and an extrusion position for supplying / discharging compressed air to / from the air cylinder in a manner of extruding the cylinder rod, Cylinder A first solenoid valve that moves in three directions: a pull-in position for supplying and discharging compressed air to and from the air cylinder in a manner of drawing in a pad; and a stop position for stopping supply and discharge of compressed air to and from the air cylinder; 2 are an extrusion position for supplying and discharging compressed air to and from the air cylinder in a mode of pushing out the cylinder rod, and a drawing position for supplying and discharging compressed air to and from the air cylinder in a mode of drawing in the cylinder rod. And a second solenoid valve provided with a throttle valve on the compressed air discharge side of the air cylinder at each position, and the second solenoid valve is moved to the pushing position or the drawing position and Control means for moving the first solenoid valve to a stop position when a predetermined time has passed after the solenoid valve has been moved to the push-out position or the pull-in position. To.

  In this printing machine, the first solenoid valve is moved to the push-out position or the pull-in position, and the second solenoid valve is moved to the push-out position or the pull-in position so that compressed air is supplied to the air cylinder by both solenoid valves. The cylinder rod can be moved at high speed. Moreover, when the predetermined time has elapsed, the supply of compressed air by the first solenoid valve is stopped by moving the first solenoid valve to the stop position, and the cylinder rod is braked by the throttle valve of the second solenoid valve. Impact at the end of the rod stroke can be reduced. As a result, the durability of the mechanism for projecting and retracting the guide member that guides the sheet passing above the sheet discharge stand can be improved in the sheet discharge device, so that high-speed printing can be supported.

  In order to achieve the above object, in the air cylinder device of the present invention, a reciprocating type air cylinder into which a cylinder rod is inserted / extracted by supply / discharge of compressed air, and a mode in which the cylinder rod is pushed out are provided in the air cylinder. On the other hand, an extrusion position for supplying / discharging compressed air, a pull-in position for supplying / discharging compressed air to / from the air cylinder in a manner to retract the cylinder rod, and a stop to stop supplying / discharging compressed air to / from the air cylinder A first solenoid valve that moves in three directions, a push position for supplying and discharging compressed air to and from the air cylinder in a manner to push out the cylinder rod, and a manner in which the cylinder rod is drawn into the air cylinder. On the other hand, the air cylinder moves in two directions, that is, a pull-in position for supplying and discharging compressed air, and the air cylinder is compressed at each position A second solenoid valve having a throttle valve on the air discharge side, and the first solenoid valve is moved to the push-out position or the pull-in position, and the second solenoid valve is moved to the push-out position or the pull-in position. And a control means for moving the first electromagnetic valve to a stop position.

  In this air cylinder device, the first solenoid valve is moved to the pushing position or the drawing position, and the second solenoid valve is moved to the pushing position or the drawing position, whereby compressed air is supplied to the air cylinder by both the solenoid valves. The cylinder rod can be moved at high speed. Moreover, when the predetermined time has elapsed, the supply of compressed air by the first solenoid valve is stopped by moving the first solenoid valve to the stop position, and the cylinder rod is braked by the throttle valve of the second solenoid valve. Impact at the end of the rod stroke can be reduced.

  According to the present invention, the impact force when the cylinder rod of the air cylinder is stopped can be suppressed. For this reason, with a configuration in which a plurality of paper discharge trays that stack and hold printed sheets are arranged along the sheet conveyance direction, the durability of the mechanism for projecting and retracting the guide member that guides the sheets can be improved, and high-speed printing can be performed. It can correspond to.

  Exemplary embodiments of a paper discharge device, a printing machine, and an air cylinder device according to the present invention will be described below in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  1 is a schematic configuration diagram of a printing press according to an embodiment of the present invention, FIG. 2 is a schematic side view of a guide mechanism in a paper discharge device according to an embodiment of the present invention, and FIG. 3 is illustrated in FIG. 4 is a schematic plan view of the guide mechanism, FIG. 4 is a schematic configuration diagram of the air cylinder device according to the embodiment of the present invention, FIG. 5 is a flowchart for explaining the control of the air cylinder device shown in FIG. 4, and FIGS. These are the operation | movement diagrams of the air cylinder apparatus shown in FIG.

  As shown in FIG. 1, the printing machine according to the present embodiment is a sheet-fed printing machine 1 that performs printing on a sheet S such as a film, art paper, or coated paper in addition to paper for normal use. 8 is a so-called offset sheet-fed printing press including a blanket cylinder 9 and an impression cylinder 10.

  The sheet-fed printing machine 1 includes a sheet feeding device 2 that feeds out and feeds sheets S for printing one by one, a printing device 3 that performs printing on the sheet S conveyed along the conveyance direction R, and printing. A sheet discharge device 4 for discharging the sheet S.

  The sheet feeding device 2 includes a sheet feeding table 5 and a sheet feeding mechanism 6. The paper feed table 5 is used for stacking and placing sheets S. The paper feed mechanism 6 picks up and supplies the sheets S stacked on the paper feed tray 5 one by one in order from the top, and uses a separator (paper suction), a cam, a swing gripper, etc., which are not explicitly shown in the figure. It is configured. The sheet feeding stand 5 is controlled to move upward in the vertical direction corresponding to the supply of the sheet S so that the sheet feeding mechanism 6 maintains a substantially constant positional relationship with the sheet S.

  The printing apparatus 3 includes a plurality of printing units 7 that print different colors and realize color printing. A plurality of printing units 7 are provided along the conveyance direction R of the sheet S for each color to be printed. In the sheet-fed printing press 1, for example, four printing units 7 corresponding to four different colors such as C (cyan), M (magenta), Y (yellow), and BL (black) are provided side by side. Yes.

  Each printing unit 7 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 formed in a cylindrical shape, and each center axis is horizontal and is provided so as to intersect the conveyance direction R. The plate cylinder 8, the blanket cylinder 9 and the impression cylinder 10 are arranged in this order from the upper side to the lower side in the vertical direction, and the outer peripheral surfaces of the plate cylinder 8 and the blanket cylinder 9 are in contact with each other. The outer peripheral surface with the trunk | drum 10 is provided so that it may mutually contact. The plate cylinder 8, the blanket cylinder 9, and the impression cylinder 10 are provided so as to be rotatable about their respective central axes.

  The plate cylinder 8 is provided with a printing plate for forming a printed image on its peripheral surface. In each printing unit 7, an ink supply device (not shown) composed of a roller group for supplying ink to the image line portion of the printing plate, and water for supplying dampening water to the non-image line portion of the printing plate. A dampening device (not shown) comprising a group of rollers is provided around the plate cylinder 8. A blanket (not shown) made of an elastic material is attached to the peripheral surface of the blanket cylinder 9. The ink supplied to the image line portion of the plate cylinder 8 is transferred to the outer peripheral surface of the blanket. The blanket cylinder 9 transfers ink to the sheet S using the printing image of the printing plate as a pattern. The impression cylinder 10 applies a predetermined printing pressure to the sheet S in cooperation with the blanket cylinder 9. The impression cylinder 10 is a so-called double cylinder having a diameter twice as large as that of the plate cylinder 8 and the blanket cylinder 9, and a clamping mechanism (not shown) that clamps the front end of the sheet S around the pressure cylinder 10 is a pressure cylinder. It is provided at two locations on the circumferential surface at substantially symmetrical positions with respect to the central axis of the barrel 10.

  Each printing unit 7 further includes an intermediate cylinder 11. The intermediate cylinder 11 is formed in a cylindrical shape like the plate cylinder 8, the blanket cylinder 9 and the impression cylinder 10, and its central axis is horizontal and intersects with the conveyance direction R, and its own central axis is It is rotatably provided as a center. The intermediate cylinder 11 is disposed on the upstream side of the impression cylinder 10 with respect to the conveyance direction R of the sheet S, and is provided so as to be in contact with the outer peripheral surface of the impression cylinder 10. Similarly to the impression cylinder 10, the intermediate cylinder 11 is a double cylinder having a diameter twice that of the plate cylinder 8 and the blanket cylinder 9, and a clamping mechanism (not shown) that clamps the leading edge of the sheet S around it. Are provided at two locations on the circumferential surface at substantially symmetrical positions with respect to the central axis of the intermediate cylinder 11.

  In each printing unit 7, the intermediate cylinder 11 is disposed so as to be in contact with the impression cylinder 10 of the printing unit 7 adjacent to the upstream side in the conveyance direction R of the sheet S. In this embodiment, as shown in FIG. 1, only the printing unit 7 positioned on the most upstream side in the transport direction R does not have the double cylinder size intermediate cylinder 11 on the upstream side of the paper transport. The impression cylinder 10 adopts a configuration in which paper is conveyed from the paper feeding device 2 via a single cylinder type intermediate cylinder 11 '. The sheet S supplied from the paper feeding device 2 is first supplied between the blanket cylinder 9 and the impression cylinder 10 of the printing unit 7 located on the most upstream side, and then the downstream printing unit 7. By being replaced by the respective clamping mechanisms from the intermediate cylinder 11 to the impression cylinder 10, it is conveyed through each printing unit 7, and ink is transferred one after another on the way. The type and arrangement of the impression cylinder 10 and the intermediate cylinder 11 are not limited to this, and can be appropriately changed according to the required transport path design.

  The paper discharge device 4 conveys the sheets S printed by the printing device 3 and stacks them in an aligned state. The paper discharge device 4 includes a chain gripper 12 that conveys the sheet S, a plurality of deliveries (first delivery 13 and second delivery 14) on which the printed sheets S are stacked, and a quality for inspecting the print quality of the sheets S. An inspection device 15 and a drying device 16 that dries the UV ink of the sheet S when printed with UV (ultraviolet) ink are provided.

  The chain gripper 12 receives the sheet S from the impression cylinder 10 of the most downstream printing unit 7 and conveys the sheet S to a position above the first delivery 13 and the second delivery 14. The chain gripper 12 moves endlessly between the adjacent position of the impression cylinder 10 of the most downstream printing unit 7 and the upper position of the second delivery 14 in a circulating path via the upper position of the first delivery 13. The endless chain 121 is opposed to the sheet S in the width direction. Between each endless chain 121, a gripper 122 (not shown) and a gripper 122 having a claw portion for sandwiching and releasing the sheet S by the gripper are supported.

  The first delivery 13 and the second delivery 14 are disposed below the chain gripper 12 and on the upstream side and the downstream side in the conveyance direction R of the sheet S. The first delivery 13 is arranged on the upstream side in the conveyance direction R of the sheet S, and the second delivery 14 is arranged on the downstream side in the conveyance direction R of the sheet S. That is, the first delivery 13 and the second delivery 14 are arranged along the conveyance direction R of the sheet S.

  The first delivery 13 includes a paper discharge tray 131, a fan device 132 that forms a downdraft near the paper discharge tray 131, a vacuum suction wheel device 133, a paper pad 134, a rear paper alignment device 135, and a width direction paper. And an aligning device 136.

  The paper discharge table 131 is configured to be suspended in a chain and movable in the vertical direction. The sheet discharge table 131 is for stacking and placing sheets S discharged from the chain gripper 12. The sheet discharge table 131 is continuously or gradually stepwise so that the drop distance of the sheet S becomes substantially constant when the height of the top surface of the uppermost stage rises as the sheets S are stacked. It is controlled to move downward in the vertical direction.

  The fan device 132 has a plurality of fans arranged between the endless chains 121. The fan device 132 moves the sheet S released from the gripper 122 above the discharge table 131 downward by airflow control.

  The vacuum suction wheel device 133 decreases the traveling speed when the sheet S is dropped and controls the dropping posture. The vacuum suction wheel device 133 brakes the sheet S by applying a suction force to the upstream (rear) end in the transport direction R of the sheet S.

  The paper pad 134, the rear paper aligning device 135, and the width direction paper aligning device 136 are provided below the chain gripper 12 and above the paper discharge table 131, that is, between the chain gripper 12 and the paper discharge table 131. ing. The paper pad 134 regulates the downstream (front side) position in the transport direction R of the sheet S, and a plurality of paper pads 134 are provided along the width direction of the sheet S. The rear paper aligning device 135 regulates the upstream (rear) position in the transport direction R of the sheet S, and is composed of a plurality of plate-like members extending in the vertical direction. It is attached. The width direction paper aligning device 136 aligns the positions of the sheets S in the width direction.

  On the other hand, the second delivery 14 includes a paper discharge table 141, a fan device 142, a vacuum suction wheel device 143, a paper pad 144, a rear paper aligning device 145, and a width direction paper aligning device 146. The paper discharge table 141, the fan device 142, the vacuum suction wheel device 143, the paper pad 144, the rear paper alignment device 145, and the width direction paper alignment device 146 include the paper discharge table 131, the fan device 132, the first delivery 13, Since it is the same as the vacuum suction wheel device 133, the paper pad 134, the rear paper aligning device 135, and the width direction paper aligning device 136, description thereof will be omitted.

  The quality inspection device 15 is arranged immediately after the chain gripper 12 receives the sheet S from the impression cylinder 10 of the most downstream printing unit 7 and on the upstream side of the chain gripper 12. The quality inspection apparatus 15 includes a television camera 151 and photographs the sheet S while irradiating light from a light source (not shown) onto the sheet S passing through the photographing range of the television camera 151 while being conveyed by the chain gripper 12. Further, the quality of the print quality of the sheet S is determined based on the photographed image.

  The drying device 16 has a plurality of UV lamps arranged between the endless chains 121 on the downstream side of the quality inspection device 15 and on the upstream side of the first delivery 13. The drying device 16 irradiates the sheet S conveyed by the chain gripper 12 with UV (ultraviolet rays) to dry the UV ink printed on the sheet S.

  In the sheet-fed printing press 1 having the above-described configuration, the sheets S stacked on the sheet feeding tray 5 of the sheet feeding device 2 are picked up one by one from the uppermost portion by the sheet feeding mechanism 6 and are transferred to the printing unit 7 of the printing device 3. Supplied. The sheets S supplied to the printing units 7 are sequentially transferred by the clamping mechanisms of the impression cylinders 10 and the intermediate cylinders 11 of the respective printing units 7, thereby being conveyed through the respective printing units 7. Transcribed. In each printing unit 7, water is supplied from a dampening device to a non-image area of the printing plate attached to the peripheral surface of the plate cylinder 8, and then ink is supplied from an ink supply device to the image area of the printing plate. . The printed image on the printing plate thus obtained is transferred to the blanket cylinder 9. The printed image transferred to the blanket cylinder 9 is transferred to the sheet S conveyed by the impression cylinder 10 and printing of one color is performed. This is repeated in each printing unit 7 for color printing. The color-printed sheet S is transferred from the impression cylinder 10 of the last printing unit 7 to the gripper 122 of the chain gripper 12 and conveyed to the paper discharge device 4. The sheet S conveyed by the chain gripper 12 is inspected by the quality inspection device 15 as necessary, and when printed with the UV ink, the UV ink is dried by the drying device 16. Further, the sheet S transported by the chain gripper 12 is removed from the top of the first delivery 13 or the second delivery 14 and dropped, and is stacked on the delivery table 131 or the delivery table 141. In addition, when stacked on the paper discharge tray 131 or the paper discharge tray 141 and printed with ink other than UV ink (for example, oil-based ink), it is possible to prevent undried ink from appearing on the back of the upper sheet S. Therefore, powder is sprayed in advance on the sheet S conveyed by the chain gripper 12. The sheets S stacked on the paper discharge tray 131 are controlled to fall by the fan device 132 and the vacuum suction wheel device 133, and are aligned by the paper pad 134, the rear paper aligning device 135, and the width direction paper aligning device 136. And stacked on the paper discharge tray 131. The sheets S stacked on the paper discharge table 141 are controlled in their dropping posture by the fan device 142 and the vacuum suction wheel device 143, and also by the paper pad 144, the rear paper aligning device 145, and the width direction paper aligning device 146. They are aligned and stacked on the paper discharge table 141.

  In the sheet discharge device 4 of the sheet-fed printing press 1 described above, it is necessary to exceed the first delivery 13 in order to discharge the sheet S to the sheet discharge table 141 of the second delivery 14. At this time, due to the action of the fan device 132 of the first delivery 13, the sheet S conveyed by the chain gripper 12 is biased downward and comes into contact with the paper pad 134 of the first delivery 13, and the back surface of the sheet S is damaged. Problems arise. Therefore, in the paper discharge device 4 according to the present exemplary embodiment, the guide mechanism 17 that guides the passage of the sheet S to be sent to the paper discharge table 141 of the second delivery 14 in the upper region of the paper discharge table 131 of the first delivery 13. Is provided.

  As shown in FIGS. 2 and 3, the guide mechanism 17 is disposed between the discharge table 131 and the chain gripper 12 in the upper region of the first delivery 13, and includes a horizontal guide plate 171, a guide member 172, and An air cylinder 173 is used.

  As shown in FIG. 2, the horizontal guide plate 171 opens the upper area of the sheet delivery tray 131 of the first delivery 13 and is arranged on the upstream side and the downstream side of the sheet S in the transport direction R of the sheet delivery platform 131. It is arranged horizontally. As shown in FIG. 3, the horizontal guide plate 171 is fixed to a frame 174 provided along the conveyance direction R of the sheet S on both sides of the paper discharge device 4. The vacuum suction wheel device 133 described above is provided at the downstream end of the horizontal guide plate 171 disposed on the upstream side.

  The guide member 172 is formed in a strip shape, and is provided on the bottom side of the horizontal guide plate 171 so that its longitudinal direction is along the conveyance direction R of the sheet S. The guide member 172 has a retracted position that is hidden on the bottom side of the horizontal guide plate 171 and a protruding position that protrudes above the discharge tray 131 of the first delivery 13 that the horizontal guide plate 171 opens (see FIGS. 2 and 3). (Shown by a one-dot chain line) is provided so as to be movable in the longitudinal direction of itself, and appears and disappears in the upper area of the paper discharge tray 131.

  A plurality of (four in this embodiment) guide members 172 provided on the upstream horizontal guide plate 171 are provided in the width direction of the sheet S (direction orthogonal to the transport direction R), and all of them are printing apparatuses. 3 corresponds to the passage range of the largest sheet S1 (see FIG. 3) that can be printed, and the two in the middle correspond to the passage range of the smallest sheet S2 (see FIG. 3) that can be printed by the printing apparatus 3. Has been. In addition, a plurality of guide members 172 provided on the horizontal guide plate 171 on the downstream side are provided in the width direction of the sheet S (five in the present embodiment), and all of the guide members 172 can be printed by the printing apparatus 3. Corresponding to the passing range of the sheet S1, the center three are arranged so as to correspond to the minimum passing range of the sheet S2 that can be printed by the printing apparatus 3.

  The air cylinder 173 is provided on the bottom side of the horizontal guide plate 171. The air cylinder 173 is fixed to the tip of the cylinder rod 173a that moves to the protruding position of the guide member 172. The air cylinder 173 moves the guide member 172 to the protruding position by extending the cylinder rod 173a, and moves the guide member 172 to the retracted position by reducing the cylinder rod 173a.

  The air cylinder 173 is driven by an air cylinder device 18 shown in FIG. The air cylinder device 18 includes an air cylinder 173 and includes a first electromagnetic valve 181, a second electromagnetic valve 182, and a control means 183.

  The air cylinder 173 is configured as a reciprocating type air cylinder in which the cylinder rod 173a is moved in and out (expanded / contracted) by supply / discharge of compressed air from a compressor (not shown).

  The first solenoid valve 181 is configured as a 5-port solenoid valve that divides the path of compressed air between the compressor and the air cylinder 173 in three directions by demagnetizing or exciting the switching unit 181a of the two solenoids 181b. Specifically, the first solenoid valve 181 is configured to push the compressed air from the compressor in one of the air cylinders 173 in such a manner that the cylinder rod 173a is pushed (extended) by excitation of one solenoid 181b (the other solenoid 181b is demagnetized). While supplying to the cylinder chamber 173b, the switching part 181a is moved to the extrusion position where the air from the other cylinder chamber 173c of the air cylinder 173 is discharged. The first solenoid valve 181 also draws compressed air from the compressor in the other cylinder chamber of the air cylinder 173 in such a manner that the cylinder rod 173a is drawn (reduced) by excitation of the other solenoid 181b (one solenoid 181b is demagnetized). While supplying to 173c, the switching part 181a is moved to the drawing-in position where the air from one cylinder chamber 173b of the air cylinder 173 is discharged. Further, the first solenoid valve 181 moves the switching unit 181a to a stop position where the supply / discharge of compressed air to / from the air cylinder 173 is stopped by excitation of both solenoids 181b.

  The second solenoid valve 182 is configured as a five-port solenoid valve that divides the path of compressed air between the compressor and the air cylinder 173 in two directions by demagnetizing or exciting the switching unit 182a of the two solenoids 182b. Specifically, the second solenoid valve 182 causes the compressed air from the compressor to be supplied to one of the air cylinders 173 in such a manner that the cylinder rod 173a is pushed (extended) by excitation of one solenoid 182b (the other solenoid 182b is demagnetized). While supplying to the cylinder chamber 173b, the switching part 182a is moved to the extrusion position where the air from the other cylinder chamber 173c of the air cylinder 173 is discharged. Further, the second solenoid valve 182 draws compressed air from the compressor in the other cylinder chamber of the air cylinder 173 in such a manner that the cylinder rod 173a is drawn (reduced) by excitation of the other solenoid 182b (demagnetization of the one solenoid 182b). While supplying to 173c, the switching part 182a is moved to the drawing-in position where the air from one cylinder chamber 173b of the air cylinder 173 is discharged.

  Further, the second electromagnetic valve 182 is provided with a throttle valve 182c on the compressed air discharge side from the air cylinder 173 at each position of the switching unit 182a. That is, the second solenoid valve 182 supplies the compressed air from the compressor to one cylinder chamber 173b and the other cylinder chamber 173c of the air cylinder 173 at the push-out position and the retracted position. The exhaust of the air from the chamber 173c and one cylinder chamber 173b is throttled by the throttle valve 182c, and the movement of the cylinder rod 173a is decelerated.

  The control means 183 is constituted by a microcomputer or the like. The control means 183 is provided with a valve drive unit 183a. The control unit 183 is provided with a storage unit 183b connected to the valve drive unit 183a. The control unit 183 is provided with a timer 183c connected to the storage unit 183b. Further, the control unit 183 is provided with an input unit 183d connected to the storage unit 183b.

  The valve drive unit 183a is connected to the solenoids 181b and 182b of the first electromagnetic valve 181 and the second electromagnetic valve 182 to excite or demagnetize the solenoids 181b and 182b. The storage unit 183b includes a RAM, a ROM, and the like, and controls the valve driving unit 183a according to a program and data stored in advance and data from the timer 183c. The timer 183c measures time. The time measured by the timer 183c is stored in the storage unit 183b. The input unit 183d includes a mouse and a keyboard, and is used to set a predetermined time measured by the timer 183c. The predetermined time set by the input unit 183d is stored in the storage unit 183b.

  The operation of the air cylinder device 18 will be described with reference to the flowchart of FIG. 5 and the operation diagrams of FIGS. 6 to 8 show an operation of pulling and reducing the cylinder rod 173a of the air cylinder 173 from a state where the cylinder rod 173a is pushed out and extended (see FIG. 4).

  First, the control unit 183 moves the switching unit 181a of the first electromagnetic valve 181 to the drawing position by the valve driving unit 183a (step ST1), and moves the switching unit 182a of the second electromagnetic valve 182 to the drawing position (step). At the same time, the control means 183 starts time measurement by the timer 183c (step ST3).

  When the switching portions 181a and 182a of the first solenoid valve 181 and the second solenoid valve 182 are moved to the retracted position, the first solenoid valve 181 causes the compressed air to flow into the other cylinder chamber of the air cylinder 173 as shown in FIG. While supplying to 173c, the air from one cylinder chamber 173b of the air cylinder 173 is discharged | emitted to air | atmosphere. The second solenoid valve 182 supplies compressed air to the other cylinder chamber 173c of the air cylinder 173 and discharges air from the one cylinder chamber 173b of the air cylinder 173 to the atmosphere via the throttle valve 182c. That is, the compressed air is supplied to the other cylinder chamber 173 c of the air cylinder 173 by the first electromagnetic valve 181 and the second electromagnetic valve 182.

  Next, when the time measured by the timer 183c reaches a predetermined time (step ST4: Yes), the control unit 183 causes the valve drive unit 183a to move the switching unit 181a of the first electromagnetic valve 181 to the stop position. (Step ST5).

  When the switching unit 181a of the first electromagnetic valve 181 is moved to the stop position, the first electromagnetic valve 181 stops the supply of compressed air to the air cylinder 173 as shown in FIG. The second solenoid valve 182 supplies the compressed air to the other cylinder chamber 173c of the air cylinder 173 and restricts the air from the one cylinder chamber 173b of the air cylinder 173 because the switching portion 182a is in the retracted position. Exhaust to the atmosphere through valve 182c. In this state, the second solenoid valve 182 throttles and discharges the air from one cylinder chamber 173b of the air cylinder 173 by the throttle valve 182c, so that even if compressed air is supplied to the other cylinder chamber 173c of the air cylinder 173. The movement of the cylinder rod 173a is slower than in the previous state. That is, the cylinder rod 173a is braked by the second electromagnetic valve 182. By maintaining this state, the cylinder rod 173a reaches the stroke end as shown in FIG.

  When the cylinder rod 173a of the air cylinder 173 is pulled out and contracted (see FIG. 8) and is pushed out and extended as shown in FIG. 4, the control means 183 is controlled by the valve drive unit 183a. The switching unit 181a of one electromagnetic valve 181 is moved to the pushing position (step ST1), the switching unit 182a of the second electromagnetic valve 182 is moved to the pushing position (step ST2), and at the same time, the control means 183 is controlled by the timer 183c. Time measurement is started (step ST3). When the time measured by the timer 183c reaches a predetermined time (step ST4: Yes), the control unit 183 moves the switching unit 181a of the first electromagnetic valve 181 to the stop position by the valve driving unit 183a ( Step ST5).

  As described above, the air cylinder device 18 according to the present embodiment moves the switching unit 181a of the first electromagnetic valve 181 to the pushing position or the drawing position, and moves the switching unit 182a of the second electromagnetic valve 182 to the pushing position or the drawing position. By moving to the position, the compressed air can be supplied to one cylinder chamber 173b or the other cylinder chamber 173c of the air cylinder 173 by both solenoid valves 181 and 182 so that the cylinder rod 173a can be moved at high speed. Become. Further, this air cylinder device stops the supply of compressed air by the first electromagnetic valve 181 by moving the switching portion 181a of the first electromagnetic valve 181 to the stop position when a predetermined time has elapsed, and the second electromagnetic valve Since the throttle valve 182c squeezes the air discharged from the other cylinder chamber 173c of the air cylinder 173 or the one cylinder chamber 173b to brake the cylinder rod 173a, the impact when the stroke end of the cylinder rod 173a is reached. Can be reduced.

  Further, the paper discharge device 4 according to the present embodiment applies the air cylinder device 18 to move the guide member 172 at a high speed and reduce an impact when the guide member 172 is stopped. It is possible to improve the durability of the mechanism that causes the guiding member to appear and disappear.

  Further, the printing press 1 according to the present embodiment applies the paper discharge device 4 including the air cylinder device 18 to move the guide member 172 at a high speed and reduce the impact when the guide member 172 is stopped. Therefore, it becomes possible to cope with high-speed printing.

  In the air cylinder device 18 in the above-described embodiment, when a predetermined time has elapsed, the switching unit 181a of the first electromagnetic valve 181 is moved to the stop position, and the switching unit 182a of the second electromagnetic valve 182 is not moved. This is not the case. For example, when a predetermined time has elapsed, the switching unit 181a of the first electromagnetic valve 181 is moved to the stop position, and the switching unit 182a of the second electromagnetic valve 182 is moved from the drawing position to the pushing position (or from the pushing position to the drawing position). By moving, the cylinder rod 173a may be braked by reversing the supply of compressed air. In this case, immediately before reaching the stroke end of the cylinder rod 173a, the switching portion 182a of the second electromagnetic valve 182 is returned to the initial position. Even with this control, it is possible to reduce the impact when the stroke end of the cylinder rod 173a is reached. Further, the paper discharge device 4 to which the air cylinder device 18 of such control is applied moves the guide member 172 at a high speed and reduces the impact when the guide member 172 is stopped. It is possible to improve the durability of the mechanism. Further, the printing press 1 to which the paper discharge device 4 including the air cylinder device 18 having such control is applied moves the guide member 172 at a high speed and reduces an impact when the guide member 172 is stopped. It becomes possible to cope with.

  As described above, the paper discharge device according to the present invention has a mechanism for projecting and retracting a guide member that guides a sheet after a plurality of paper discharge bases that stack and hold printed sheets are arranged along the sheet conveyance direction. Suitable for improving durability. In addition, the printing press according to the present invention is suitable for supporting high-speed printing after having the paper discharge device. The air cylinder device according to the present invention is suitable for suppressing the impact force when the cylinder rod of the air cylinder is stopped.

1 is a schematic configuration diagram of a printing machine according to an embodiment of the present invention. It is a schematic side view of the guide mechanism in the paper discharge device concerning an embodiment of the invention. FIG. 3 is a schematic plan view of the guide mechanism shown in FIG. 2. 1 is a schematic configuration diagram of an air cylinder device according to an embodiment of the present invention. It is a flowchart explaining control of the air cylinder apparatus shown in FIG. FIG. 5 is an operation diagram of the air cylinder device shown in FIG. 4. FIG. 5 is an operation diagram of the air cylinder device shown in FIG. 4. FIG. 5 is an operation diagram of the air cylinder device shown in FIG. 4.

Explanation of symbols

1 sheet-fed printing machine (printing machine)
DESCRIPTION OF SYMBOLS 2 Paper feeder 3 Printing apparatus 4 Paper discharge apparatus 5 Paper feed stand 6 Paper feed mechanism 7 Printing unit 8 Plate cylinder 9 Blanket cylinder 10 Impression cylinder 11 Intermediate cylinder 12 Chain gripper 121 Endless chain 122 Gripper 13 First delivery 131 Discharge stand 132 Fan Device 133 Vacuum Suction Wheel Device 134 Paper Bump 135 Rear Paper Alignment Device 136 Width Direction Paper Alignment Device 14 Second Delivery 141 Outlet 142 Fan Device 143 Vacuum Suction Wheel Device 134 Paper Bump 145 Rear Paper Alignment Device 146 Width Direction Paper Alignment device 15 Quality inspection device 16 Drying device 17 Guide mechanism 171 Horizontal guide plate 172 Guide member 173 Air cylinder 173a Cylinder rod 174 Frame 18 Air cylinder device 181 First solenoid valve 181a Switching portion 181b Solenoid 182 Second solenoid valve 182a Switching 182b solenoid 182c throttle valve 183 control unit 183a valve driving unit 183b storing unit 183c timer 183d input R conveyance direction S (S1, S2) sheets

Claims (3)

A plurality of paper discharge trays for stacking and holding printed sheets are arranged along the sheet conveyance direction, and guided to the upper area of the paper discharge tray in a manner to guide the sheets passing above the paper discharge tray. In the paper discharge device provided so that the members can appear and disappear,
A reciprocating type air cylinder having a cylinder rod connected to the guide member, the cylinder rod being moved in and out by supply / discharge of compressed air;
An extrusion position for supplying and discharging compressed air to and from the air cylinder in a mode of pushing out the cylinder rod, a pull-in position for supplying and discharging compressed air to and from the air cylinder in a mode of drawing in the cylinder rod, and A first solenoid valve that moves in three directions at a stop position to stop the supply and discharge of compressed air to and from the air cylinder;
2 are an extrusion position for supplying and discharging compressed air to and from the air cylinder in a mode of pushing out the cylinder rod, and a drawing position for supplying and discharging compressed air to and from the air cylinder in a mode of drawing in the cylinder rod. And a second solenoid valve provided with a throttle valve on the compressed air discharge side of the air cylinder at each position,
Control means for moving the first solenoid valve to the push-out position or the pull-in position and moving the second solenoid valve to the push-out position or the pull-in position and moving the first solenoid valve to the stop position when a predetermined time has elapsed. When,
A paper discharge device comprising: A sheet feeding device that feeds and feeds the sheets one by one; a printing device that performs printing on the sheet fed from the sheet feeding device; and a discharge that ejects the sheet that has been printed by the printing device. A plurality of paper discharge trays arranged in the sheet conveyance direction and passing above the paper discharge tray. In a printing machine in which a guide member is provided so as to be able to appear and retract in an upper area of the paper discharge stand in a guiding manner,
A reciprocating type air cylinder having a cylinder rod connected to the guide member, the cylinder rod being moved in and out by supply / discharge of compressed air;
An extrusion position for supplying and discharging compressed air to and from the air cylinder in a mode of pushing out the cylinder rod, a pull-in position for supplying and discharging compressed air to and from the air cylinder in a mode of drawing in the cylinder rod, and A first solenoid valve that moves in three directions at a stop position to stop the supply and discharge of compressed air to and from the air cylinder;
2 are an extrusion position for supplying and discharging compressed air to and from the air cylinder in a mode of pushing out the cylinder rod, and a drawing position for supplying and discharging compressed air to and from the air cylinder in a mode of drawing in the cylinder rod. And a second solenoid valve provided with a throttle valve on the compressed air discharge side of the air cylinder at each position,
Control means for moving the first solenoid valve to the push-out position or the pull-in position and moving the second solenoid valve to the push-out position or the pull-in position and moving the first solenoid valve to the stop position when a predetermined time has elapsed. When,
A printing machine comprising: A reciprocating type air cylinder in which the cylinder rod is moved in and out by compressed air supply and discharge;
An extrusion position for supplying and discharging compressed air to and from the air cylinder in a mode of pushing out the cylinder rod, a pull-in position for supplying and discharging compressed air to and from the air cylinder in a mode of drawing in the cylinder rod, and A first solenoid valve that moves in three directions at a stop position to stop the supply and discharge of compressed air to and from the air cylinder;
2 are an extrusion position for supplying and discharging compressed air to and from the air cylinder in a mode of pushing out the cylinder rod, and a drawing position for supplying and discharging compressed air to and from the air cylinder in a mode of drawing in the cylinder rod. And a second solenoid valve provided with a throttle valve on the compressed air discharge side of the air cylinder at each position,
Control means for moving the first solenoid valve to the push-out position or the pull-in position and moving the second solenoid valve to the push-out position or the pull-in position and moving the first solenoid valve to the stop position when a predetermined time has elapsed. When,
An air cylinder device comprising:

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