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EP0431575B1 - Dispositif de montage de plaques pour machines d'impression - Google Patents

Dispositif de montage de plaques pour machines d'impression Download PDF

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Publication number
EP0431575B1
EP0431575B1 EP90123264A EP90123264A EP0431575B1 EP 0431575 B1 EP0431575 B1 EP 0431575B1 EP 90123264 A EP90123264 A EP 90123264A EP 90123264 A EP90123264 A EP 90123264A EP 0431575 B1 EP0431575 B1 EP 0431575B1
Authority
EP
European Patent Office
Prior art keywords
plate
cylinder
circumferential surface
unit
plate cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90123264A
Other languages
German (de)
English (en)
Other versions
EP0431575A3 (en
EP0431575A2 (fr
Inventor
Hiroyuki C/O Toride Plant Sugiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komori Corp
Original Assignee
Komori Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP1315383A external-priority patent/JP2844231B2/ja
Priority claimed from JP1315384A external-priority patent/JP2867155B2/ja
Priority claimed from JP1315382A external-priority patent/JP2550417B2/ja
Application filed by Komori Corp filed Critical Komori Corp
Publication of EP0431575A2 publication Critical patent/EP0431575A2/fr
Publication of EP0431575A3 publication Critical patent/EP0431575A3/en
Application granted granted Critical
Publication of EP0431575B1 publication Critical patent/EP0431575B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1206—Feeding to or removing from the forme cylinder

Definitions

  • the present invention relates to a plate mounting apparatus for a printing press, wherein one end of a plate is gripped by one fixing unit arranged in a gap in an outer circumferential surface of a plate cylinder, the plate is wound around the outer circumferential surface of the plate cylinder, and the other end of the plate is gripped by the other fixing unit to mount the plate on the plate cylinder, and an old plate is removed from the plate cylinder upon a change in specifications of printed matters and a new plate is mounted in place of the old plate.
  • a gap having almost a rectangular section and a length almost equal to the overall length of a plate cylinder is formed in the outer circumferential surface of the plate cylinder for a sheet-fed printing press.
  • a plate lockup apparatus consisting of a leading-side lockup device serving as a fixing unit for fixing one end of a plate and a trailing-side lockup device serving as a fixing unit for fixing the other end of the plate is axially fixed on the bottom surface of the gap.
  • Each of the conventional leading- and trailing-side lockup devices comprises an elongated lockup table extending in the axial direction of the plate cylinder, a plurality of gripper plates, swingably supported at an edge portion of this lockup table by a plurality of bolts, for gripping or releasing the plate with or from the lockup table, and a plurality of cams which can be respectively engaged with gaps at the edges of the gripper plates.
  • the plurality of cams are pivotally aligned along the axis.
  • a plurality of compression coil springs are interposed between the lockup table and the gripper plates to bias the gripper plates in an open direction.
  • the device of this reference also comprises a single guide roller which is pressed against the plate cylinder during rotation to wind the plate tightly thereon.
  • a plate removal apparatus As disclosed in Japanese Patent Laid-Open No. 62-169647, a plate removal apparatus is proposed wherein a suction pad supported on a support member is brought to come close to a plate cylinder and to chuck an end of a plate to remove the plate.
  • a plate supply apparatus for supplying a plate to a plate cylinder is proposed, as disclosed in Japanese Patent Laid-Open No. 58-187355 or the like.
  • This plate supply apparatus comprises an arm having a suction pad fixed at its distal end portion.
  • a plate mounting leading-side hook and a plate mounting trailing-side hook are mounted in the plate cylinder.
  • the arm having the suction pad which chucks the plate is moved between a plate mounting position and the leading-side hook in the circumferential portion of the plate cylinder to hook one bent portion of the plate against the leading-side hook.
  • the plate is then wound around the circumferential surface, and the other bent portion of the plate is hooked against the trailing-side hook.
  • a plate mounting apparatus for a printing press for winding a plate around a circumferential surface of a plate cylinder, the plate having one end fixed to one fixing unit arranged in a gap in the circumferential surface, and for fixing the other end of the plate to the other fixing unit arranged in the gap in the circumferential surface
  • the apparatus comprising a guide roller which opposes the circumferential surface of the plate cylinder wherein said guide roller lies adjacent one fixing unit at the time of insertion of the plate into the one fixing unit, and the apparatus further comprises a press roller which is detachably supported on the circumferential surface of the plate cylinder and brought into rolling contact with the circumferential surface adjacent the other fixing unit at the time of insertion of the plate into the other fixing unit.
  • the plate cylinder is stopped at a position where a plate fixing surface of a fixing unit for fixing one end of a plate is positioned almost on a tangent of a guide roller, and the fixing surface is opened to insert one end of the plate into this opening.
  • the fixing surface is closed, and the plate cylinder is pivoted.
  • the plate is guided to the other fixing unit and is inserted into its opening.
  • the plate is brought into tight contact with the circumferential surface of the plate cylinder by the guide roller and is wound around the circumferential surface.
  • the plate is then inserted into the opening by the press roller set in the mounted state. Therefore, the plate is brought into tight contact with the circumferential surface of the plate cylinder and can be easily inserted into the fixing units.
  • the guide and press rollers are stored together with the plate holding unit to be largely away from the plate cylinder during the printing operation. Therefore, inspection, maintenance, and ink replenishing can be facilitated.
  • the unit as a whole is kept stopped at the standby position.
  • the trailing-side fixing unit in the plate cylinder is located to oppose the plate holding unit, and this fixing unit is operated.
  • the old plate is removed into the plate holding unit.
  • the actuator is operated in response to a signal from the detector, thereby releasing the old plate gripping unit.
  • the old plate gripping unit is moved by a tension of a spring member, so that the plate is entirely stored in the unit.
  • the plate prior to mounting of a plate onto a plate cylinder, the plate is chucked by a large number of suction pads formed on the surface of the plate holding unit, and a plate reference hole is engaged with a reference pin on the plate holding unit.
  • the plate cylinder is pivoted and stopped so that the plate gripping surface of the leading-side plate lockup device is located almost on a line extending from the suction pads.
  • the gripper surface is opened, and the holding unit which holds the suction pads is moved to the plate cylinder.
  • a linearly formed leading end of the plate is inserted into the open plate gripping surface.
  • the gripper surface is closed so that one end of the plate is gripped by the leading-side plate lockup device.
  • the trailing end of the plate opposes to the plate gripper surface of the trailing-side plate lockup device, and the other end of the plate is inserted into the open plate gripper surface of the trailing-side plate lockup device.
  • the gripping surface is closed, the plate is mounted on the plate cylinder.
  • the trailing-side plate lockup device is moved in the circumferential direction of the plate cylinder to keep the plate taut, the plate is brought into tight contact with the circumferential surface of the plate cylinder. Since the two ends of the plate are firmly gripped by the corresponding plate lockup devices, the plate can be kept taut with a sufficient tension.
  • Figs. 1 to 12H show a plate mounting apparatus for a printing press according to an embodiment of the present invention, in which:
  • Figs. 1 to 12H show an embodiment in which a plate mounting apparatus according to the present invention is employed in an automatic plate replacing apparatus.
  • a gap 2 having a substantially rectangular sectional shape is formed in the outer circumferential surface of a plate cylinder 1 along the entire length of the plate cylinder 1.
  • Saddle-like guides 3 and 4 are bolted on the bottom surface portions of the gap 2 at its two ends.
  • a leading-side plate lockup device 5 serving as one fixing unit comprises a lockup table 6 having an almost square sectional shape and extending in the axial direction of the plate cylinder. Thin-walled portions 6a at the two ends of the lockup device 6 are fitted to be slightly circumferentially movable while their vertical movement is restricted by the left and right guides 3 and 4.
  • An intermediate portion of the lockup table 6 is slidably pressed by a plurality of guides (not shown) fixed on the bottom surface of the gap 2, so that floating of the lockup table 6 is prevented.
  • a plurality of screw holes 6b are formed in portions along the longitudinal direction of the lockup table 6 and each has a section as shown in Fig. 4.
  • An adjusting screw 7 whose distal end is tapered is threadably engaged with a corresponding one of the screw holes 6b.
  • a collared pin 8, the collar portion of which is fitted between the lockup table 6 and the gap 2, is slidably inserted in each pin hole corresponding to each of the adjusting screws 7. The distal end of the collared pin 8 abuts against a tapered surface of the corresponding adjusting screw 7.
  • An L-shaped leading-side plate holder 11 shown in Fig. 5 is fixed by bolts 12 and 13 on the inclined surface of the lockup table 6.
  • Three gripper plates 14 having a substantially V-shaped section, divided in the axial direction of the plate cylinder, and constituting the same overall length as that of the lockup table 6 are swingably supported on pins 11a horizontally extending from the plate holders 11.
  • a gripper surface 14a of each gripper plate 14 opposes the gripper surface of the lockup table 6.
  • a plurality of not shown projections are formed on the gripper surface 14a and are engaged with the recesses formed in the opposite gripper surface.
  • a plurality of studs 15 each having a sectional shape as shown in Fig.
  • a compression coil spring 17 is inserted between a spring reception pin 16 threadably engaged with a screw hole of each stud 15 and the gripper plate 14 to bias the gripper plate 14 in a direction so that the gripper surface 14a of the gripper plate 14 is closed.
  • a plurality of bearings 18 having a rectangular parallelepiped shape are fixed by bolts at the central part of the bottom surface of the gap 2 and are aligned along the axial direction of the plate cylinder.
  • a hexagonal cam shaft 19 is fitted in the bearings 18.
  • a plurality of plate gripper cams 20 each having large- and small-diameter portions are mounted on the cam shaft 19 in tandem with each other. The cam surface of each plate gripper cam 20 is in contact with a vertical surface of the corresponding gripper plate 14.
  • the large-diameter portions of the plate gripper cams 20 cause the gripper plates 14 to pivot in the counterclockwise direction against the biasing forces of the compression coil springs 17, so that the gripper surfaces 14a are opened.
  • a trailing-side plate lockup device 30 serving as the other fixing unit is arranged parallel to the leading-side lockup device 5 within the gap 2.
  • the trailing-end lockup device 30 comprises a spring reception bar 31 having almost the same length as the overall length of the plate cylinder and a vertical surface which is in contact with the vertical surface of the corresponding bearing 18.
  • the spring reception bar 31 is fixed on the bottom surface of the gap 2 by a plurality of bolts 32.
  • the spring reception bar 31 comprises a regulation surface 31a extending in the radial direction of the plate cylinder 1.
  • a support shaft 33 extends between the regulation surface 31a and a wall surface 2b of the gap 2 so that the two ends of the support shaft 33 are located near disc bearers 34 at the two ends of the plate cylinder 1.
  • Three separated lockup tables 35 and three separating gripper plates 36 have opposite gripper surfaces 35a and 36a extending in the radial direction of the plate cylinder 1 so that ends of the lockup tables 35 and the gripper plates 36 opposite to these gripper portions are swingably connected to each other through the support shaft 33.
  • Reference numerals 37 denote adjusting screws for connecting the three separated lockup tables 35.
  • Right- and left-hand threads are threadably engaged with screw holes of each lockup table 35.
  • a tool is inserted into a hole of a collar portion 37a integrally formed between the two adjacent lockup tables 35 and is turned to adjust a distance between the adjacent lockup tables 35.
  • a rod-like cam 38 formed by a planar small-diameter portion 38a and an arcuated large-diameter portion 38b are pivotally mounted on the bearer 34 in a recessed portion 2c formed in the wall surface 2b of the gap 2.
  • An extended portion 38c of the cam 38 from the bearer 34 has a hexagonal shape.
  • Reference numeral 40 denotes a guide for pivoting the cam 38, which guide is fixed in the recessed portion 2c of the wall surface 2b by a bolt 41.
  • Compression coil springs 42 are interposed between a plurality of spring hole bottom surfaces formed in the non-gripper ends of the lockup tables 35 and the plurality of spring hole bottom surfaces formed in the spring reception bar 31 to separate the lockup tables 35 from the spring reception bar 31.
  • a compression coil spring 45 is interposed between the bottom surface of a spring hole 31b and a collar portion of a spring shaft 44 whose movement is limited by a double nut 43 slidably mounted in the spring hole 31b of the upper portion of the spring reception bar 31, and separates each gripper plate 36 from the spring reception bar 31.
  • a compression coil spring 46 is arranged within the spring hole of the upper portion of each lockup table 35 to bias this lockup table 35 from the corresponding gripper plate 36.
  • Reference numeral 47 denotes a blanket cylinder which is brought into rolling contact with the plate cylinder 1.
  • Each opening/closing drive unit for pivoting the cam shaft 19 and the cam 38 to open/close each plate gripper surface will be described below.
  • Each opening/closing drive unit is arranged near each of right and left frames 50 for supporting the plate cylinder 1 and the blanket cylinder 47.
  • the right drive unit (the left-hand unit in Fig. 1 for illustrative convenience) on the right frame 50 when viewed from the sheet feeder will be described first.
  • An air cylinder 51 serving as a drive unit is swingably supported on the upper end face of the frame 50 through a bracket 52.
  • Levers 53 and 54 are split-fixed on the leading-side cam shaft 19 and the trailing side cam 38 between the bearer 34 and the frame 50.
  • a link mechanism 55 is arranged between the air cylinder 51 and the levers 53 and 54.
  • the distal end portion of a rod 57 connected to a piston rod 56 of the air cylinder 51 is connected to a free end portion of an L-shaped lever 59 pivotally supported on the upper surface of the frame 50 through a bracket 58.
  • the lower end portion of a rod 60 whose upper end is connected to the other free end portion of the L-shaped lever 59 is connected to a free end portion of a lever 62 supported on a stud 61 of the frame 50.
  • a lever 63 is formed integrally with the lever 62.
  • a free end portion of the lever 63 is connected to one end of a roller lever 64.
  • Reference numeral 65 denotes a lever shaft pivotally supported between the right and left frames so that axial movement of a lever 66 pivotally mounted thereon is limited.
  • a free end portion of the lever 66 is supported by the central portion of the roller lever 64. That is, a four-joint link is constituted by the levers 63 and 66 and the roller lever 64.
  • the roller lever 64 is reciprocated together with the levers 63 and 66 in the radial direction of the plate cylinder 1.
  • a roller 67 which is selectively brought into contact with the lever 53 or 54 in accordance with a pivotal phase of the plate cylinder 1 is mounted on the distal end portion of the roller lever 64.
  • the roller lever 64 is reciprocated, the lever 53 or 54 is pivoted about the cam shaft 19 or the cam 38 within the range between the solid line and the alternate long and short dashed line in Fig. 7.
  • the left opening/closing drive unit (the right drive unit in Fig. 1) on the left frame side when viewed from the sheet feeder is arranged similarly to the right opening/closing drive unit, although the left opening/closing drive unit is not illustrated in Fig. 7.
  • the arrangement of the left opening/closing drive unit is the same as that of the right opening/closing drive unit as far as the components from the air cylinder 51 to the roller 67 are concerned.
  • the arrangement of the left opening/closing drive unit is different from that of the right opening/closing drive unit in levers 53 and 54. That is, as shown in Figs. 1 and 7, the right levers 53 and 54 extend upward from the cam shaft 19 and the cam 38.
  • levers 53A and 54A in Fig. 1 extend downward from the cam shaft 19 and the cam 38. That is, the distal end portion of the right trailing-side lever 54 and the distal end portion of the left leading-side lever 53A are in phase in the circumferential direction and oppose the rollers 67.
  • the lever 54 is pressed by the right roller 67 to open the plate gripper surfaces of the trailing-side plate lockup device 30.
  • the left lever 53A is pressed by the left roller 67.
  • the right lever 53 is moved from the position of the solid line to the position of the alternate long and short dashed line, so that the plate gripper surfaces of the leading-side plate lockup device 5 are opened.
  • Reference numeral 70 in Fig. 11 denotes a cover for covering the front side of the plate cylinder 1 throughout its entire length.
  • the cover 70 is pivotally supported on a free end portion of an L-shaped lever 72 pivotally supported on the upper end surface of the frame 50 through a bracket 71.
  • An actuation end of a piston rod 74 of an air cylinder 73 pivotally supported on the frame 50 is mounted on the L-shaped lever 72.
  • a plate replacing apparatus for replacing an old plate with a new plate is arranged in the plate lockup apparatus and the opening/closing unit. That is, a pair of right and left brackets 81 are located obliquely above the plate cylinder 1 and are mounted on the upper ends of the rear sides of right and left frames 80 mounted in a printing unit in front of the frames 50.
  • the proximal end of a loader 83 serving as a plate holding member having a rectangular member whose long sides are aligned in the horizontal direction and having almost the same length as the plate cylinder is mounted on a support shaft 82 pivotally mounted on these brackets 81.
  • An air cylinder 84 connected to the control unit is pivotally supported on the right and left frames 80 near the brackets 81.
  • a lever 86 supported by the frame 80 and a lever 87 supported on the loader 83 are connected to an actuation end of a piston rod 85 of the air cylinder 84.
  • the loader 83 is swung through the levers 86 and 87 between a suspended position indicated by the solid line and an inclined position indicated by the alternate long and short dashed line, so that the distal end portion of the loader 83 comes close to or is separated from the circumferential surface of the plate cylinder 1.
  • two guide plates 88 having a V-shaped inlet vertically extend in the lower half of the loader 83.
  • a plate 89 released and rewound upon pivotal movement of the plate cylinder 1 is inserted between the guide plates 88 in a direction indicated by an arrow.
  • a plurality of pairs of brackets 90 each having an oval shape are fixed on the tubular support shaft 82 in the upper end portion of the loader 83 at positions obtained by dividing the overall width of the loader 83 into 1/3.
  • Convex members 91 are supported on the respective pairs of brackets 90.
  • Each convex member 91 has a band-like leaf spring 92 biased in a direction to wind the convex member 91.
  • the fixed end of the leaf spring 92 is fixed to an old plate gripping unit 93.
  • a support plate 94 fixed to the lower end of the leaf spring 92 can be slidably reciprocated along the inner wall surface of the loader.
  • An L-shaped plate hook 95 serving as an old plate gripping member is pivotally supported at its center.
  • the plate hook 95 is biased by a coil spring 94 so as to be held in an upright position (position of the solid line).
  • a bent portion of the plate 89 entering between the guide plates 88 is hooked by a hook portion of the plate hook 95. That is, prior to the start of replacement of the plate 89, the old plate gripping unit 93 is manually moved downward to the central standby position of the loader 83, and a piston rod 98 of an air cylinder 97 arranged at this standby position is moved forward upon depression of a push button.
  • the plate hook 95 is obliquely moved to be located at the position of the alternate long and short dashed line against the biasing force of the torsion coil spring 96.
  • Reference numeral 100 denotes a sensor consisting of a light-emitting element and a light-receiving element and located near the air cylinder 97.
  • the sensor 100 detects the leading edge of the plate 89 entering between the guide plates 88, and the piston rod 98 of the air cylinder 97 is moved backward to cause the plate hook 95 to stand against the elastic force of the torsion coil spring 96.
  • the bent portion of the plate 89 is hooked by the plate hook 95, and at the same time, locking by the support plate 94 is released, so that the plate trailing edge holding unit 83 as a whole is moved upward together with the plate 89 by the tension of the leaf spring 92. Therefore, the plate 89 is pulled into the loader 83.
  • a pin 102 is slidably supported in a hole of a block 101 arranged in correspondence with the plate hook 95 at the upper end portion of the loader 83 and is biased in a direction to be removed from the block 101 by a compression coil spring 103.
  • This pin 102 is pushed against the elastic force of the compression coil spring 103 to incline the upper end portion of the plate hook 95 as indicated by the alternate long and short dashed line, thereby releasing the bent portion of the plate 89. Therefore, the plate 89 can be removed from the loader 83.
  • Upper-, middle- (not shown), and lower-stage suction pads 104 (each stage consists of a plurality of pads) for chucking a new plate 105 to be fed to the plate cylinder 1 in place of the old plate 89 are connected to a suction air source and are arranged on the surface of the loader 83.
  • the lower-stage suction pads 104 are vertically movable. That is, a pair of right and left air cylinders 106 are supported on both side plates of the loader 83 through brackets 107 above the lower-stage suction pads 104.
  • the suction pads 104 are mounted in tandem with each other on a bar 109, both ends of which are fixed to piston rods 108 of the air cylinders 106.
  • Reference numerals 110 denote racks fixed on the right and left side plates of the loader 83 and meshed with pinions 111 at the two ends of the bar 109 to smoothly move the bar 109 backward.
  • Reference numeral 112 denotes a reference pin slidably fitted in a hole of another bar 113 and biased by a compression coil spring 114 to extend to be fitted in a reference hole of the new plate 105, thereby positioning the new plate 105.
  • An arm shaft 115 is pivotally supported at a lower end portion of the loader 83.
  • a pair of right and left arms 116 are fixed on portions of the arm shaft 115 which extend from the loader 83.
  • a stationary roller shaft 117 is supported between free end portions of the arms 116.
  • a plurality of press rollers 118 made of, e.g., rubber or brushes are pivotally arranged on the roller shaft 117.
  • a lever 123 is fixed through a connecting plate 122 to the actuation end of a piston rod 121 of an air cylinder 120 fixed to one widthwise end of the loader 83 through a bracket 119.
  • the free end portion of a lever 124 fixed on the arm shaft 115 is mounted on the lower end portion of the lever 123.
  • the arm 116 can be pivoted in the range between a storage position indicated by the solid line in Fig. 9 and an in-operation position indicated by the alternate long and short dashed line.
  • the roller 118 is brought into tight contact with the new plate 105 on the plate cylinder 1, and the inner surface of the plate 105 is brought into tight contact with the outer circumferential surface of the plate cylinder 1.
  • the bent portion of the trailing edge of the new plate 105 is inserted into the open trailing-side lockup device 30.
  • a plurality of guide rollers 125 made of, e.g., rubber or brushes are arranged in tandem with each other on the arm shaft 115 and are brought into slidable contact with the new plate 105 so as to guide it to the plate lockup device 5.
  • Reference numerals 126 denote form rollers (generally at least four rollers) of an inking apparatus brought into contact with the plate surface on the plate cylinder 1 to apply an ink to the plate surface.
  • the units and apparatuses described above and a servo motor for rotating the plate cylinder 1 are connected through a control unit (not shown) and are operated at predetermined timings.
  • the loader 83 is suspended from the support shaft 82.
  • the new plate 105 is chucked by the upper-, middle-, and lower-stage suction pads 104, and the reference pin 112 is fitted in the reference hole, so that the new plate 105 is positioned and mounted in the loader 83.
  • the old plate gripping unit 93 in the loader 83 is manually moved downward.
  • the piston rod 98 is moved forward to urge the plate hook 95.
  • the plate hook 95 is inclined as indicated by the alternate long and short dashed line in Fig. 8 and is thus opened.
  • One end of the plate hook urges the support plate 94 against the inner surface of the cover 99, so that the apparatus is stopped at the standby position, and the plate hook 95 is inclined and opened to open the lower hook portion.
  • a start button is depressed.
  • the air cylinder 73 is actuated to open the cover 70 through the L-shaped lever 72, as indicated by the alternate long and short dashed line in Fig. 11.
  • the air cylinder 84 is actuated to incline the loader 83 to a plate replacement position of Fig. 12B, through the levers 86 and 87.
  • the trailing-side lockup device 30 opposes the distal end portion of the loader 83.
  • the right roller 67 opposes the distal end portion of the lever 54 on the cam 38.
  • the left roller 67 opposes the lever 53A on the cam shaft 19 which is in phase with the lever 54. In this state, when the right and left air cylinders 51 are simultaneously actuated, the leading- and trailing-side lockup devices 5 and 30 are simultaneously opened upon rotation of the cam 38 and the cam shaft 19.
  • the trailing edge portion of the old plate 89 is popped up by its rigidity from the gripper surfaces of the trailing-side lockup device 30 and abuts against a guide 130, as shown in Fig. 12C.
  • the plate cylinder 1 is pivoted in a direction opposite to the direction of the arrow in Fig. 9, so that the trailing edge of the old plate 89 is inserted between the guide plates 88 of the loader 83.
  • the sensor 100 detects the plate and drives the air cylinder 97, so that the piston rod 98 is moved backward.
  • the plate hook 95 then stands up, as indicated by the solid line in Fig. 8.
  • Fig. 12D shows a state during removal of the old plate 89.
  • the servo motor is operated to slightly pivot the plate cylinder 1, and the plate cylinder 1 is stopped so that the open plate gripper surface of the leading-side lockup device 5 reaches a line extended from the new plate 105 and held on the loader 83, as shown in Fig. 9.
  • the air cylinder 106 is actuated to rotate the pinions 111 on the racks 110, so that the bar 109 is moved downward.
  • the new plate 105 held by the lower-stage suction pads 104 is guided in slidable contact with the rollers 125 whose circumferential surfaces face a plate movement path.
  • the leading edge of the new plate 105 is inserted into the leading-side lockup device 5.
  • the new plate 105 When the servo motor is operated in this state to pivot the plate cylinder 1 in the direction of the arrow, the new plate 105 is wound around the circumferential surface of the plate cylinder 1, and the trailing edge of the new plate 105 is stopped at a position corresponding to the roller 118. During rotation of the plate cylinder 1, the rollers 125 are rotated in rolling contact with the surface of the new plate 105. Therefore, the new plate 105 is brought into tight contact with the circumferential surface of the plate cylinder 1. Thereafter, the air cylinder 120 is actuated to move the piston rod 121 backward.
  • the arm 116 is pivoted through the levers 123 and 124, and the rollers 118 made of, e.g., rubber or brushes are brought into tight contact with the circumferential surface of the plate cylinder 1, thereby inserting the trailing-edge bent portion of the new plate 105 into the trailing-side lockup device 30 by the press rollers 118.
  • the trailing bent end portion of the new plate 105 is accurately aligned with the opening of the trailing-side plate lockup device 30 and is firmly gripped by this plate lockup device.
  • Fig. 12F shows a state during rotation of the plate cylinder 1.
  • Fig. 12G shows a state after rotation.
  • the left air cylinder When the trailing-edge end portion of the new plate 105 is inserted into the trailing-side plate lockup device 30, the left air cylinder is operated. In this case, the lever 54 has already been returned to the position indicated by reference numeral 54A. The roller urges the lever 54A downward, and the pivotal movement of the cam 38 causes closing of the trailing-side plate lockup device 30, thereby gripping the inserted end of the new plate 105. At the end of pivotal movement of the cam 38, the gripper plates 36 and the lockup tables 35 become integral with each other and move together in the circumferential direction of the plate cylinder 1. The new plate 105 is thus kept taut and is brought into tight contact with the circumferential surface of the plate cylinder 1.
  • the air cylinder 120 is actuated to store the press rollers 118, and the piston rod 85 of the air cylinder 84 is moved backward to pull the levers 86 and 87.
  • the loader 83 is moved downward to the stored state, as shown in Fig. 12H.
  • the cover 70 is covered upon operation of the air cylinder 73. Therefore, printing can be restarted.
  • the plate hook 95 is inclined to release the old plate 89.
  • the old plate 89 is removed from the loader 83.
  • the new plate 105 can be mounted on the loader 83 to stand by. A space between the printing units is not reduced in the stored state of the loader 83 and the press rollers 118.
  • the above embodiment exemplifies an automatic plate replacing apparatus.
  • a plate replacing apparatus may be driven upon operation of a push button or the like.
  • the above embodiment also exemplifies a sheet-fed printing press, but is applicable to a rotary printing press to obtain the same effect as described above.
  • the plate mounting apparatus for a printing press wherein the plate, one end of which is fixed to one fixing unit formed in the gap of the circumferential surface of the plate cylinder, is wound around the circumferential surface of the plate cylinder, and the other end of the plate is fixed to the other fixing unit formed in the gap of the circumferential surface of the plate cylinder, the guide roller opposing the circumferential surface of the plate cylinder and corresponding to one fixing unit at the time of insertion of the plate into this fixing unit for the plate, and the press roller detachably supported on the circumferential surface of the plate cylinder and opposing the circumferential surface of the plate cylinder so as to correspond to the fixing unit at the time of insertion of the plate into the other fixing unit are arranged.
  • the plate cylinder When the plate cylinder is to be inserted into one fixing unit at the time of mounting of the plate into the plate cylinder, the plate is inserted while being in sliding contact with the guide roller, thereby facilitating insertion, improving productivity, and reducing labor.
  • the plate cylinder, guided to the other fixing unit after it is wound around the circumferential surface of the plate cylinder, is wound around the circumferential surface of the plate cylinder while being in tight contact therewith by the guide roller. Therefore, the plate is brought into tight contact with the circumferential surface of the plate cylinder, and the bent portion of the trailing end is caused to accurately correspond to the opening of the trailing side plate lockup device, thereby improving printing alignment precision.
  • the plate holding unit for holding a plate is arranged, and the plate holding unit is supported to be pivotal about a fulcrum of the printing press obliquely above the plate cylinder so that the distal end portion of the plate holding unit is reciprocated to come close to or to be away from the circumferential surface of the plate cylinder.
  • the guide roller and the press roller are supported on the plate holding unit. During printing, the guide roller and the press roller can be stored to be largely away from the plate cylinder. Inspection, maintenance, and ink replenishment can be facilitated, thereby improving workability.
  • the plate mounting apparatus for a printing press comprises the old plate gripping unit which is biased to a side opposite to the plate cylinder by the spring member, which is brought into sliding contact with the inner wall surface of the apparatus to be reciprocated therealong, and which is moved to the standby position located midway along the plate removal path against the spring force of the spring member, and the actuator which is fixed on the apparatus, which normally fixes the old plate gripping member to the standby position, and which releases the old plate gripping member from the standby position in response to a signal from the detector for detecting insertion of the old plate.
  • the plate removed into the old plate holding unit is automatically and properly held at the standby position located midway along the old plate removal path, and is then stored in the old plate holding unit upon movement of the plate gripping unit biased by the spring member.
  • the plate is not erroneously released from the pads, thereby improving safety and reliability, and reducing labor.
  • only one member is used to lock the old plate gripping member at the standby position and to keep the old plate griping member open, thereby obtaining a simple, compact structure.
  • the plate mounting apparatus for a printing press comprises the plate holding unit which is formed so that the plate fixing surface of the plate fixing unit arranged in the gap of the outer circumferential surface of the plate cylinder extends in an axial direction of the plate cylinder and which has a surface substantially even with the plate fixing surface outside the plate cylinder.
  • the plurality of suction pads and the reference pin which engages with the reference hole in the plate are formed on the surface of the plate holding unit.
  • the suction pads are held by a holding means which is held between the plate holding units and reciprocated by the drive units in the radial direction of the plate cylinder, thus simplifying the structure as compared with a conventional structure.
  • the plate mounted in the plate cylinder is firmly gripped by the gripping surfaces of both the plate lockup devices. Therefore, the plate is kept sufficiently taut and brought into tight contact with the circumferential surface of the plate cylinder, thereby improving printing alignment precision.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Screen Printers (AREA)
  • Discharge By Other Means (AREA)
  • Electric Connection Of Electric Components To Printed Circuits (AREA)

Claims (4)

  1. Appareil pour le montage d'une plaque sur une presse à imprimer pour enrouler une plaque (89, 105) autour de la surface périphérique d'un cylindre (1) porte-plaque, ladite plaque (89, 105) ayant l'une de ses extrémités fixée à une unité de fixation (5) disposée dans un intervalle (2) formé dans ladite surface périphérique, et pour fixer l'autre extrémité de ladite plaque (89, 105) à l'autre unité (30) de fixation disposée dans ledit intervalle (2) formé dans ladite surface périphérique, ledit appareil comprenant un rouleau de guidage (125) qui fait face à ladite surface périphérique dudit cylindre (1) porte-plaque, ledit appareil étant caractérisé en ce que ledit rouleau de guidage (125) est situé de manière adjacente à ladite première unité (5) de fixation au moment de l'introduction de ladite plaque dans ladite première unité (5) de fixation ; et que ledit appareil comprend en outre un rouleau de pressage (118) qui est supporté de façon amovible sur ladite surface périphérique dudit cylindre (1) porte-plaque et est amené en contact de roulement avec ladite surface périphérique adjacente à ladite autre unité (30) de fixation au moment de l'introduction de ladite plaque dans ladite autre unité (30) de fixation.
  2. Appareil selon la revendication 1, caractérisé en ce qu'il comprend en outre une unité (83) de retenue de plaque pour retenir ladite plaque (89, 105), ladite unité de retenue (83) étant supportée sur ladite presse à imprimer au-dessus dudit cylindre (1) porte-plaque de telle façon qu'une partie d'extrémité distale de ladite unité (83) de retenue de plaque se déplace alternativement pour venir au voisinage de ou être écartée de ladite surface périphérique dudit cylindre (1) porte-plaque, ledit rouleau de guidage (125) et ledit rouleau de pressage (118) étant supportés sur ladite unité (83) de retenue de plaque.
  3. Appareil selon la revendication 1 ou la revendication 2, caractérisé en ce que :
       ladite unité (83) de retenue de plaque est pourvue de :
       une unité (93) de saisie de plaque ancienne qui est sollicitée par un organe élastique (92) en direction d'un côté de ladite unité de retenue de plaque qui fait face en s'écartant dudit cylindre (1) porte-plaque, laquelle unité de saisie étant amenée en contact glissant avec une surface de paroi interne dudit appareil de façon à être déplacée alternativement le long de cette surface, ladite unité de saisie étant déplacée en direction d'une position d'attente située à midistance le long d'un trajet d'enlèvement de plaque à l'encontre de la force élastique dudit organe élastique (92), et
       un dispositif d'actionnement (97) fixé sur ledit appareil au voisinage de ladite position d'attente pour fixer normalement ladite unité de saisie de plaque ancienne (93) dans ladite position d'attente et pour relâcher ladite unité de saisie de plaque ancienne (93) à partir de ladite position d'attente en réponse à un signal provenant d'un détecteur (100) destiné à détecter l'introduction de la plaque ancienne (89).
  4. Appareil selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'une surface de fixation (14a) de plaque de ladite première unité de fixation (5) est formée de façon à s'étendre dans une direction axiale dudit cylindre (1) porte-plaque, ladite unité de retenue de plaque (83) est disposée à l'extérieur dudit cylindre (1) porte-plaque de façon qu'une surface de ladite unité (83) de retenue de plaque soit sensiblement de niveau avec ladite surface (14a) de fixation de plaque, une pluralité de patins d'aspiration (104) et une goupille de référence (112) qui pénètre dans un orifice de référence dans une plaque (105) sont formés sur une surface de ladite unité (83) de retenue de plaque, et lesdits patins d'aspiration (104) sont maintenus par un organe de retenue (109) qui est maintenu sur un côté de ladite unité de retenue de plaque (83) et est disposé de façon à se déplacer en se rapprochant et en s'écartant du cylindre (1) porte-plaque dans une direction sensiblement parallèle à la surface (14a) de fixation de plaque.
EP90123264A 1989-12-06 1990-12-05 Dispositif de montage de plaques pour machines d'impression Expired - Lifetime EP0431575B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP1315383A JP2844231B2 (ja) 1989-12-06 1989-12-06 印刷機の刷版保持装置
JP1315384A JP2867155B2 (ja) 1989-12-06 1989-12-06 版胴への刷版供給装置
JP315384/89 1989-12-06
JP1315382A JP2550417B2 (ja) 1989-12-06 1989-12-06 版胴への刷版装着装置
JP315383/89 1989-12-06
JP315382/89 1989-12-06

Publications (3)

Publication Number Publication Date
EP0431575A2 EP0431575A2 (fr) 1991-06-12
EP0431575A3 EP0431575A3 (en) 1991-09-11
EP0431575B1 true EP0431575B1 (fr) 1995-10-04

Family

ID=27339469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90123264A Expired - Lifetime EP0431575B1 (fr) 1989-12-06 1990-12-05 Dispositif de montage de plaques pour machines d'impression

Country Status (3)

Country Link
EP (1) EP0431575B1 (fr)
AT (1) ATE128669T1 (fr)
DE (1) DE69022822T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10008489B4 (de) * 1999-03-19 2006-08-24 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zur Zuführung einer Druckplatte

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2570485Y2 (ja) * 1991-06-24 1998-05-06 株式会社小森コーポレーション 印刷機の刷版交換装置
DE4140413C2 (de) * 1991-12-07 1995-03-16 Roland Man Druckmasch Vorrichtung zum Wechseln von Druckplatten bei Offsetdruckmaschinen
JP2571056Y2 (ja) * 1992-01-08 1998-05-13 株式会社小森コーポレーション 印刷機の刷版交換装置
DE4214047A1 (de) * 1992-04-29 1993-11-04 Heidelberger Druckmasch Ag Halteeinrichtung fuer eine zu verschiebende platte
DE4214168C2 (de) * 1992-04-30 1994-10-06 Roland Man Druckmasch Vorrichtung zum Aufspannen von Druckplatten auf dem Plattenzylinder von Druckmaschinen, insbesondere Bogenoffsetdruckmaschinen
DE4214206C2 (de) * 1992-04-30 1995-06-29 Roland Man Druckmasch Vorrichtung zum Betätigen einer Klemmschiene gegenüber der Spannschiene des Plattenzylinders einer Rotationsdruckmaschine, insbesondere Bogenoffsetdruckmaschine
DE4214207C1 (fr) * 1992-04-30 1993-07-22 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
DE4215969C2 (de) * 1992-05-18 1994-10-13 Roland Man Druckmasch Vorrichtung zum Zuführen von Druckplatten auf den Plattenzylinder von Druckmaschinen, insbesondere Bogenoffsetdruckmaschinen
JP2837324B2 (ja) * 1992-10-29 1998-12-16 株式会社桜井グラフィックシステムズ 印刷機のファンアウト調整装置
JP2837323B2 (ja) * 1992-10-29 1998-12-16 株式会社桜井グラフィックシステムズ 印刷機の版ひねり調整機構
AU6541494A (en) * 1993-05-12 1994-12-12 Deritend Engineering Limited Board treatment apparatus
DE4332803C2 (de) * 1993-09-27 1996-10-24 Roland Man Druckmasch Vorrichtung zum automatischen Zuführen von Druckplatten zum Plattenzylinder einer Druckmaschine
DE4404558C2 (de) * 1994-02-12 1996-02-01 Roland Man Druckmasch Vorrichtung zum automatischen Wechseln von Druckplatten
FR2718674B1 (fr) * 1994-04-18 1996-07-12 Heidelberg Harris Sa Dispositif d'échange de clichés de machines rotatives à imprimer.
JP2001322248A (ja) * 2000-05-17 2001-11-20 Komori Corp 版交換装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0411731A2 (fr) * 1989-08-04 1991-02-06 Komori Corporation Dispositif pour attacher un cliché dans une machine rotative

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0411731A2 (fr) * 1989-08-04 1991-02-06 Komori Corporation Dispositif pour attacher un cliché dans une machine rotative

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10008489B4 (de) * 1999-03-19 2006-08-24 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zur Zuführung einer Druckplatte

Also Published As

Publication number Publication date
EP0431575A3 (en) 1991-09-11
ATE128669T1 (de) 1995-10-15
DE69022822D1 (de) 1995-11-09
EP0431575A2 (fr) 1991-06-12
DE69022822T2 (de) 1996-05-23

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