JP2008162294A - Plate changing device in a rotary printing press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve miniaturization of an apparatus with workability improved, and the structure simplified. <P>SOLUTION: For a new edition the gripper side of which is held by a form plate holder 41, when the form plate holder 41 is moved to an upper end part along a guide rail 42, that is inserted into the gripper side plate vise 25 of a plate cylinder 20. Under an open state outside a form plate receiver 75 for receiving an old plate which is excluded, a bearing member 77 for bearing a plate end side of the new edition under a closed state outside the plate receiver 75 for receiving an old plate which is excluded under an open state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a plate changer in a rotary printing machine that removes an old plate wound around a plate cylinder and winds the new plate around the plate cylinder, and more particularly to holding structure of a discharged old plate and a new plate before being wound around the plate cylinder. is there.

As a plate change device in a conventional rotary printing press, a new plate mounting portion for mounting a new plate and an old plate storage portion for storing an old plate are provided, and the cassette is swingably supported by a frame. Some actuators are provided with an actuator that is moved to two positions (see, for example, Patent Document 1). In this apparatus, first, the actuator is operated to move the cassette to the plate exchange position so that the front end of the cassette is opposed to the plate fixing device of the plate cylinder, and when the plate cylinder is rotated almost once, the plate cylinder is fixed. The old version from which the plate bottom has been discharged from the apparatus is stored in the old version storage section of the cassette. Next, the new plate mounted on the new plate mounting device is inserted into the plate fixing device of the plate cylinder, and the plate cylinder is rotated approximately once so that the new plate is wound around the plate cylinder.
Japanese Patent Laid-Open No. 11-77968

  In the plate changing apparatus in the conventional rotary printing press described above, the cassette is provided with a new plate mounting portion for holding a new plate before being wound around the plate cylinder, and an old plate storage portion for holding the discharged old plate. For this reason, the outer shape of the cassette becomes large, which narrows the working space between the printing units, and reduces the workability during maintenance inspection. Further, since a large actuator for moving the cassette is required, there is a problem that not only the apparatus is increased in size but also the structure is complicated.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to improve the workability, reduce the size of the apparatus, and simplify the structure of the plate changing apparatus in the rotary printing press. Is to provide.

  In order to achieve this object, the present invention relates to a plate changer in a rotary printing press that discharges an old plate from a plate fixing device of a plate cylinder and inserts a new plate, and holds the new plate and is movable to the plate insertion position. A retainer and a plate receiver supported so as to be movable between an open position for receiving the discharged old plate and a closed position; and a support member for supporting the new plate is provided outside the plate receiver; The new plate is supported outside the plate receiver by the support member when the plate is in the closed state, and the old plate is supported inside the plate receiver when the plate receiver is in the open state.

  According to the present invention, in the above invention, the plate receiver is positioned below the plate cylinder and receives the plate discharged from the plate cylinder and falling.

  In the present invention, the support of the new plate by the support member is released by the movement of the plate receiver from the closed position to the open position.

  According to the present invention, in the above invention, the new plate is supported on the tip of the plate receiver by the plate receiver in the open position.

  According to the present invention, in the above invention, a sensor is provided for detecting that the old version has been received by the plate receiver.

  According to the present invention, since the plate receiver also serves to hold the old plate discharged from the plate cylinder and the new plate mounted on the plate cylinder, not only the number of parts is reduced but also the structure is simplified. In addition, since no plate holding member is interposed between the plate receiver and the plate cylinder, it is possible to reduce the size of the apparatus and to widely use between printing units. Will improve.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram showing the entire rotary printing press according to the present invention, FIG. 2 is a view taken in the direction of arrow II in FIG. 1, FIG. 3 is a view taken in the direction of arrow III in FIG. 5 is an enlarged side view, and FIG. 5 is a V arrow view in FIG. 6 is a sectional view taken along line VI-VI in FIG. 2, FIG. 7 is a sectional view taken along line VII-VII in FIG. 2, FIG. 8A is a sectional view taken along line VIII (a) -VIII (a) in FIG. (B) is the VIII (b) arrow directional view in the figure (a). FIG. 9 is a block diagram showing the same configuration, FIG. 10 is a flowchart showing the switching operation between full-automatic version change and semi-automatic version change, FIG. 11 is a flowchart showing the operation of the first half of full-automatic version change, and FIG. FIG. 13 is a flowchart showing the operation of the second half of the automatic version exchange. FIG. 13 is a flowchart showing the operation of the semi-automatic version exchange. 14 to 17 are cross-sectional views taken along the line XIIII-XIIII in FIG. 2 for explaining the operation of fully automatic plate replacement. 18 to 21 are cross-sectional views taken along the line XIIII-XIIII in FIG. 2 for explaining the semi-automatic replacement operation.

  In FIG. 1, what is generally indicated by reference numeral 1 is a sheet-fed rotary printing press for double-sided printing, which includes a paper feeding device 2, four upper printing units 3A to 3D for front side printing, and for back side printing. The lower four printing units 4 </ b> A to 4 </ b> D and a paper discharge device 5 are schematically configured. The paper feeding device 2 is provided with a conventionally known sucker device (not shown) that feeds the paper 11 stacked on the paper stacking plate 10 one by one to the feeder board 12. The paper 11 delivered to the feeder board 12 is replaced by the nail of the transfer cylinder 13 of the first color printing unit 3A by a swing device (not shown) provided at the tip of the feeder board 12. The four printing units 3 </ b> A to 3 </ b> D for surface printing include a plate cylinder 15 around which a printing plate is wound, a rubber cylinder 16 in contact with the plate cylinder 15, and a double-diameter impression cylinder 17 in contact with the rubber cylinder 16. An ink portion 18 for accommodating an inking device is provided above the plate cylinder 15. The paper 11 held by the nail of the transfer cylinder 13 is replaced by the nail of the impression cylinder 17, and the first color is printed on the surface when being conveyed between the rubber cylinder 16.

  The four printing units 4A to 4D for backside printing include a plate cylinder 20 around which a printing plate is wound, a rubber cylinder 21 in contact with the plate cylinder 20, and a double-diameter impression cylinder 22 in contact with the rubber cylinder 21. An ink unit 23 is provided below the plate cylinder 20 to accommodate an inking device including a number of roller groups (not shown). The paper 11 that has been replaced by the nail of the impression cylinder 17 of the printing unit 3A for front side printing and the nail of the impression cylinder 22 of the printing unit 4A for back side printing is transferred to the back side when being conveyed between the rubber cylinder 21. Printing of the first color is performed. Thereafter, four colors are printed on the front surface and the back surface of the paper 11 sequentially by the printing units 3B to 3D for front surface printing and the printing units 4B to 4D for back surface printing.

  The paper 11 held on the nail of the impression cylinder 22 of the printing unit 4D for the back side printing of the fourth color is transferred to the holding nail device provided on the nail cage spanned between the pair of left and right paper discharge chains of the paper discharge device 5. It can be replaced. After the paper 11 held by the gripper device is conveyed by the paper discharge chain, the gripper by the gripper device is released by the cam mechanism, so that the paper 11 is dropped and stacked on the paper stacking plate 24. As shown in FIG. 3, a notch formed on the peripheral surface of the plate cylinder 20 is provided with a holding-side plate vise 25 and a butt-side plate vise 26. And vise boards 25a and 26a and holding plates 25b and 26b, respectively. A pair of reference pins 27, 27 (one not shown) arranged in the direction of the cylinder axis of the plate cylinder 20 are erected on the upper surface of the vise stand 25 a of the holding-side plate vise 25. A pair of notches 7 and 7 formed on the holding side edge of the new plate P2 are engaged with these reference pins 27 and 27, and the new plate P2 is positioned in the vertical direction and the width direction. The above-described cylinder arrangement or plate vise apparatus is not particularly different from the configuration of a conventionally known sheet-fed rotary printing machine for duplex printing.

  Hereinafter, a plate changing apparatus in a sheet-fed rotary printing press, which is a feature of the present invention and is employed in the printing units 4A to 4D for back surface printing, will be described with reference to FIGS. Since the plate insertion devices employed in the respective printing units 4A to 4D all have the same structure, only the plate replacement device employed in the printing unit 4A will be described below. In FIG. 2, the printing unit 4A is provided with a pair of left and right frames 30, 30 facing each other, and a pair of left and right chain guides 31, 31 are fixed inside the left and right frames 30, 30. ing. A pair of left and right chains 32 and 32 are supported by these chain guides 31 and 31 so as to be slidable in the vertical direction, and a plurality of elongated shielding plates 33 are horizontally mounted between the left and right chains 32 and 32. ing.

  A safety cover 34 is formed by the plurality of shielding plates 33. As shown in FIG. 3, the safety cover 34 opens and closes the front side of the plate cylinder 20 by driving a sprocket 35 whose teeth face the chain guide 31. It is configured as follows. That is, the teeth of the sprocket 35 are engaged with the chain 32, and the sprocket 35 is rotated in the clockwise and counterclockwise directions in the figure by a safety cover driving motor 87 (see FIG. 9) that drives in the forward and reverse directions. In the figure, when the sprocket 35 is rotated clockwise, the safety cover 34 is raised and the front side of the plate cylinder 20 is opened, and when the sprocket 35 is rotated counterclockwise, the safety cover 34 is lowered. The front side of the plate cylinder 20 is closed. A pair of left and right reference pins 36 and 36 are implanted in the shielding plate 33 </ b> A positioned at the lowermost position of the plurality of shielding plates 33.

  Next, the plate insertion device 40 will be described with reference to FIGS. In FIG. 5, a plate insertion device 40 includes a plate holder 41 that sucks and holds the holding side of the new plate P2, and a pair of guide rails 42, 42 as a pair of left and right posture changing means for guiding the plate holder 41. And an actuator 43 that moves the plate holder 41. The actuator 43 includes two plate holder first actuators 43A and plate holder second actuators 43B, and these two actuators 43A and 43B are combined. Therefore, these actuators 43A and 43B have a function of positioning the plate holder 41 at three positions, point A, point B and point C, which will be described later, by selective driving. The plate holder 41 is formed in an elongated rectangular parallelepiped, and a plurality of suction pads 45 are provided in two rows on the front surface, and suction air from a suction pump 86 (see FIG. 9) is supplied to the suction pads 45 as a negative pressure. Is done. As shown in FIG. 4, a pair of left and right blind hole-like insertion holes 46, 46 are provided on the back surface of the plate holder 41, and the friction coefficient of the openings of these insertion holes 46, 46 is provided. A support member 47 formed in a ring shape by a small elastic material is fixed. As shown in FIG. 5, two pairs of rollers 48 are rotatably supported on the left and right ends of the plate holder 41.

  Each of the pair of guide rails 42 is provided with a guide groove 50 having a U-shaped cross section. As shown in FIG. 5, the pair of guide rails 42, 42 are formed so that the pair of guide grooves 50 face each other. It is fixed inside the left and right frames 30, 30. As shown in FIG. 4, the guide rail 42 includes a first straight portion 42 a that extends substantially vertically in the vertical direction that forms the lower side, and a second straight portion that slopes obliquely upward and forms the upper side. 42c and a curved portion 42b interposed between the first straight portion 42a and the second straight portion 42c. Among these, as shown in FIG. 16 (b), the inclination of the second straight portion 42c is such that the vise stand 25a of the holding side plate vise 25 of the plate cylinder 20 positioned at a predetermined rotational position when the new plate is inserted. It is formed so as to be substantially the same as the inclination of the upper surface. By engaging the roller 48 of the plate holder 41 described above in the guide groove 50 of the guide rail 42, the plate holder 41 is supported so as to be movable so as to be guided by the guide groove 50.

  In FIG. 5, reference numeral 51 denotes a drive shaft rotatably supported between the left and right frames 30, 30. A pair of drive levers 52, 52 are implanted on the left and right sides of the drive shaft 51. , 52 are inserted into the insertion holes 46 so as to be slidable with respect to the support member 47 of the plate holder 41 described above. Both ends of the drive shaft 51 protrude from the left and right frames 30, 30, and one ends of a pair of intermediate levers 53, 53 are fixed to the both ends, respectively. A rotary element 54 is pivotally attached to the other end portions of the intermediate levers 53, 53, and a rod of the plate holder first actuator 43A is fixed to the rotary element 54, and a second plate holder second plate is fixed. The tip of the rod of the actuator 43B is pivotally attached to the frame 30.

  Therefore, in FIG. 4, the plate holder 41 is positioned at the point A of the first linear portion 42 a of the guide rail 42 in a state where the rods of both the actuators 43 </ b> A and 43 </ b> B are retracted together. At this point A, the suction surface of the suction pad 45 is in a vertical state so that the new plate P2 can be mounted on the plate holder 41. The posture of the plate holder 41 in this state is the same as that of the new plate P2. The first posture to be attached to 41 is set as the first position. Therefore, in the first posture of the plate holder 41, the new plate P2 in which the holding side is sucked by the suction pad 45 is also in a vertical state. Further, the plate holder 41 positioned at the first position is positioned directly below the lowermost shielding plate 33A of the closed safety cover 34 as shown in FIG.

  When the rod of the first actuator 43A for one plate holder is moved forward, the drive shaft 51 rotates in the clockwise direction in FIG. 4 via the rotor 54 and the intermediate lever 53, and the plate holder 41 moves to the guide rail. It is positioned at point B of the curved portion 42b of 42. At this point B, as shown in FIG. 16A, the suction surface of the suction pad 45 of the plate holder 41 is inclined by an angle α from the horizontal plane, and the holding side of the new plate P2 sucked by the suction pad 45 Is inclined by an angle α. In this state, the holding side of the new plate P2 sucked by the suction pad 45 is retracted from the old plate discharge port 62 and the front of the old plate discharge port 62 is opened, and the old plate P1 is discharged from the old plate discharge port 62. It becomes possible.

  Therefore, the posture of the plate holder 41 at this time is the second posture that allows the old plate P1 to be discharged, and this point B is the second position. Furthermore, when the rod of the second actuator 43B for the other plate holder is also moved forward, the drive shaft 51 is further rotated in the clockwise direction in FIG. 4, and the plate holder 41 is moved to the second linear portion 42c of the guide rail 42. Positioned at point C. When the plate holder 41 is positioned at the point C, as shown in FIG. 16 (b), the holding side plate vise 25 of the plate cylinder 20 is placed on the extension line of the suction surface of the suction pad 45 of the plate holder 41. The upper surface of the vise stand 25a is positioned. Therefore, the posture of the plate holder 41 at this time is a third posture that allows the new plate P2 to be inserted between the vise stand 25a and the holding plate 25b, and this point C is the third position.

  Next, the fixed cover and the discharge plate cover will be described with reference to FIGS. 3, a plate discharge cover 55 is provided immediately below the plate holder 41 positioned at the first position A. As shown in FIG. 2, the plate discharge cover 55 has a pair of hinges 56, 56 at the lower end. As shown in FIG. 6B, the hinge 56 is used as a center of rotation and can be laid down on the inside of the machine. As shown in FIG. 3, the fixed cover 57 is formed into a crank shape in cross section by a front plate 58, a horizontal plate 59, and a back plate 60, and left and right ends are attached to the inside of the left and right frames 30, 30. Under the horizontal plate 59, as shown in FIG. 3, an ink fountain 23a of an inking device accommodated in the ink section 23 is provided. In order to supply ink to the ink fountain 23a, a fixed cover 57 is provided. An opening 58 a is formed below the front plate 58.

  As shown in FIG. 6, the lower ends of a pair of left and right cover opening / closing actuators 61, 61 are pivotally attached to the back surface of the front plate 58 of the fixed cover 57, and the tip of the rod 61 a of the cover opening / closing actuator 61 is It is pivotally attached to the back. Accordingly, when the rod 61a moves forward, as shown in FIG. 5A, the plate removal cover 55 rotates counterclockwise about the hinge 56 as a rotation center, and thus the front side of the printing unit 4A is closed. On the other hand, as the rod 61a moves backward, as shown in FIG. 5B, the plate discharge cover 55 rotates clockwise around the hinge 56, so that the front side of the printing unit 4A is opened and the old plate discharge is performed. An outlet 62 is formed.

  2 and 6, reference numeral 63 denotes a guide member, which is a U-shaped guide portion 63a and a pair of leg portions 63b, 63b formed by bending the left end of the guide portion 63a at right angles to the back side in the drawing. Are formed in series by one bar member. The guide member 63 has leg portions 63b, 63b planted on the left end side of the upper portion of the fixed cover 57, and extends to the right end side so that the guide portion 63a is parallel to the fixed cover 57 and horizontal in the left-right direction. Exist. In FIG. 2, a pair of rectangular windows 64 are formed on the left and right ends of the front plate 58 of the fixed cover 57. 2 and 7, a pair of long and narrow rectangular fitting holes 65 are formed on the left and right ends of the horizontal plate 59 of the fixed cover 57.

  In FIGS. 2 and 7, reference numeral 66 denotes a link member, the upper end of which is pivotally attached to a lever 67 fixed to the back surface of the plate removal cover 55, and the lower end of which is pivotally attached to a plate entry restriction member 68. As shown in FIG. 7, the base end portion of the plate entry restriction member 68 is rotatably supported on the back side of the front plate 58 of the fixed cover 57, and the plate discharge cover 55 closes the plate discharge outlet 62. In the state of FIG. 7A, the swinging end portion faces so as to be parallel to the fitting insertion hole 65. From this state, as shown in FIG. 4B, when the plate discharge cover 55 rotates clockwise in the drawing with the hinge 56 as the rotation center, the plate entry restricting member 68 is connected to the base end portion via the link member 66. Is pivoted clockwise around the pivot center, so that the upper side of the opening 58a is closed through the fitting insertion hole 65. 2 and 8, a plate pushing member 70 faces the back side of the window 64, and a lower end portion of the plate pushing member 70 is a plate pushing actuator 71 fixed to the front plate 58 of the fixed cover 57. Is fixed to the rotating shaft. Accordingly, when the rotation shaft of the plate pushing actuator 71 is turned counterclockwise in FIG. 8A, the plate pushing member 70 is also turned counterclockwise, and is moved from the window 64 to the outside of the front plate 58. Protruding.

  Next, the plate receiving structure will be described with reference to FIGS. 2 and 3, a bracket 74 is horizontally mounted between the lower end portions of the left and right frames 30 and 30. The bracket 74 is formed in a crank shape in a side view, and is provided with an upper surface portion 74a and a lower surface portion 74b. ing. Reference numeral 75 denotes a plate-shaped plate receiver, which is formed in a rectangular shape when viewed from the front, and has a lower end connected to a lower surface portion 74b of the bracket 74 via a hinge 76, and is supported rotatably about the hinge 76. The lower side of the opening 58a is opened and closed.

  A pair of support members 77, 77 are provided on the left and right sides of the plate receiver 75, and each of the support members 77, 77 has a reflective photoelectric sensor 77 a that points toward the inside of the plate receiver 75. Is provided. Reference numerals 78 and 78 denote a pair of left and right plate receiving drive actuators, which are pivotally attached to the upper surface portion 74 a of the bracket 74, and the tip end of the rod 78 a is pivotally attached to the inside of the plate receiver 75. Therefore, when the rod 78a of the actuator 78 is retracted, the plate receiver 75 rotates in the clockwise direction in FIG. 3 around the hinge 76 and closes the lower side of the opening 58a. On the other hand, when the rod 78a of the actuator 78 is advanced, the plate receiver 75 rotates counterclockwise in FIG. 3 with the hinge 76 as the rotation center, and opens the lower side of the opening 58a.

  As shown in FIG. 14A, when the plate receiver 75 is closed, the support member 77 is moved to the new plate when the holding side of the new plate P2 is sucked to the suction pad 45 of the plate holder 41 as will be described later. Support the P2 version. Also, as shown in FIG. 5B, when the plate receiver 75 is opened from this state, the plate bottom of the new plate P2 is detached from the support member 77 and supported at the tip of the plate receiver 75, and the old plate P1 that has been discharged is removed. Is installed inside the plate receiver 75. Thus, since the plate receiver 75 serves as a support for the old version P1 and the new version P2, the number of parts is reduced and the structure is simplified.

  In FIG. 9, 80 is a fully automatic plate change button, 81 is a semi-automatic plate change button, 82 is a plate suction button for operating the suction pump 86, and 83 is a plate receiving button for operating the plate receiving drive actuator 78. Reference numeral 84 denotes a version change start button, which is a button for automatically releasing the old version at the time of full automatic version change and starting an operation for feeding the new version. An operation button 85 is a button for driving both the holding-side and buttocks-side plate vise opening / closing actuators 89 and 90 in order to feed the new plate P2 at the time of semi-automatic plate change. Reference numeral 88 denotes a drive motor that rotates the cylinder of the entire printing press, and rotates the plate cylinder 20 by a predetermined amount in the forward and reverse directions when the plate is changed. A control device 91 controls the operation of the actuator and the like described above by operating the button described above.

  89 is a holding side plate vise opening / closing actuator. When the holding side plate vise opening / closing actuator 89 is operated, the holding side of the holding side plate vise 25 in FIG. A cam shaft (not shown) rotates in the forward and reverse directions by a predetermined amount. The holding plate 25b is swung by the rotation of the holding side camshaft, and the holding side closing and opening of the plate on the holding side of the printing plate are performed with the vise base 25a. On the other hand, when the butt side vise opening / closing actuator 90 is actuated, the butt side camshaft (not shown) of the butt side vise 26 in FIG. Rotate in the direction. The gripping plate 26b is swung by the rotation of the bottom camshaft, and the gripper closing and opening on the bottom side of the printing plate are performed with the vise base 26a.

  Next, the operation of exchanging the printing plate in a fully automatic manner will be described with reference to FIGS. 10, 11, 12 and FIGS. As shown in FIG. 14A, the plate holder first actuator 43A and the second actuator 43B are deactivated in advance, and the plate holder 41 is positioned at the first position. In FIG. 10, by operating the fully automatic plate change button 80 to turn it ON, a method for fully automatically changing the printing plate is selected (S1). In FIG. 14A, the plate bottom of the new plate P2 is supported on the support member 77 of the plate receiver 75, and the new plate P2 is passed through the outside of the guide portion 63a of the guide member 63 so that the notch 7 of the new plate P2 is formed. The holding side of the new plate P2 is mounted on the suction pad 45 of the plate holder 41 by engaging with the reference pin 36 of the lowermost shielding plate 33A of the safety cover 34 (S3).

  In S4, when the plate suction button 82 is operated and turned on, the suction pump 86 is operated in S5, so that the holding side of the new plate P2 is sucked by the suction pad 45 of the plate holder 41, and the new plate P2 is the plate. It is held by the holder 41. At this time, the suction force by the suction pump 86 is adjusted so that the new plate P2 is sucked so as to be slidable with respect to the suction pad 45. In S6, when the plate receiving button 83 is operated and turned ON, in S7, the plate receiving actuator 78 is operated to advance the rod 78a. Accordingly, as shown in FIG. 14B, the plate receiver 75 is opened and the plate bottom of the new plate P2 is detached from the support member 77, so that it is supported at the tip of the plate receiver 75 and the holding of the new plate P2 is completed. At this time, since the holding side of the new plate P2 is held by the plate holder 41 and the bottom of the plate is supported by the tip of the plate receiver 75, the back surface of the new plate P2 in this state is discharged from the plate discharge outlet 62, which will be described later. Since the discharge path of the old plate P1 is covered, the discharged old plate P1 is restricted from jumping to the adjacent unit side.

  When the plate change start button 84 is operated and turned on in S8, the safety cover drive motor 87 is driven in the forward direction in S9. Therefore, as shown in FIG. Rotate in the direction. Therefore, the safety cover 34 is raised, the front side of the plate cylinder 20 is opened, and the reference pin 36 of the shielding plate 33A is removed from the notch 7 of the new plate P2. In S10, the cover opening / closing actuator 61 is actuated to rotate the plate discharge cover 55, so that the upper end of the plate discharge cover 55 falls to the plate cylinder 20 side and the old plate discharge port 62 is opened. At the same time, the plate entry restricting member 68 rotates via the link member 66 due to the fall of the plate removing cover 55, so that the upper side of the opening 58a is closed. In S11, the first actuator 43A for plate holder is operated, and the plate holder 41 is positioned at the B point which is the second position, as shown in FIG. 15B. In the second position, as described above, the plate holder 41 is switched to the second posture that enables the old plate P1 to be removed.

  When the drive motor 88 is driven in the reverse direction in S12 and the plate cylinder 20 is rotated by a predetermined amount in the reverse direction, the plate cylinder 20 is stopped in S13, and the gripper-side plate vise opening / closing actuator 89 is operated in S14. Therefore, the holding of the holding side plate vise 25 of the plate cylinder 20 is opened, and the holding of the holding side of the old version P1 is released. When the plate cylinder 20 is rotated by a predetermined amount in S15 and the plate cylinder 20 is stopped in S16, the bottom plate vise opening / closing actuator 90 is operated in S17. The mouth of force 26 opens, and the mouth on the bottom side of the old version P1 is released. In S18, when the plate cylinder 20 rotates in the reverse direction, the bottom side of the old plate P1 is detached from the plate cylinder 20 and guided by the plate discharge cover 55, so that the old plate P1 is discharged out of the machine from the old plate discharge port 62.

  As shown in FIG. 16 (a), the discharged old plate P1 is guided downward through the inside of the guide portion 63a of the guide member 63, the holding side comes off from the holding of the holding side plate vise 25, and the plate bottom is removed. Supported by the plate receiver 75. At this time, since the plate bottom of the old version P1 is detected by the photoelectric sensor 77a, it is confirmed that the old version P1 is stored in the plate receiver 75, and the old plate is completely discharged. The rotation of the plate cylinder 20 is stopped in S19 by the output signal. As described above, the completion of the removal of the old plate P1 is detected by the photoelectric sensor 77a, so that the next new plate P2 can be fed safely and reliably. At this time, the holding side plate vise 25 is positioned so as to face the end face of the second straight portion 42 c of the guide rail 42. Here, the removed old version P1 was supported by the plate holder 75 with the plate bottom, and the new version P2 to be fed was held by the plate holder 41 and the plate bottom was supported by the plate holder 75. It has a structure. As described above, since the retained old plate P1 and the supplied new plate P2 are held in the vicinity of the plate cylinder 20 and the lower end of the printing unit, the plates P1 and P2 are disposed between the adjacent printing units. There is no intervening member. For this reason, the space between the printing units is not narrowed by the member that holds the plate, so that the workability during maintenance and inspection is improved.

  In S20, when the second actuator 43B for plate holder is actuated, the plate holder 41 moves to the second straight portion 42c of the guide rail 42 as shown in FIG. Positioned on. At this time, the inclination of the second linear portion 42c and the inclination of the upper end surface of the vise base 25a of the holding-side plate vise 25 are substantially the same, and the plate holder positioned at the second linear portion 42c. Since the upper end surface of the vise stand 25a is positioned on the extension of the suction surface of the suction pad 45 of 42, the holding side of the new version P2 sucked by the suction pad 45 is between the vise stand 25a and the holding plate 25b. Inserted. At this time, the plate holder 41 is positioned at the third position C so that the notch 7 of the new plate P2 is pressed by the reference pin 27. Accordingly, when the notch 7 of the new version P2 is engaged with the reference pin 27, the new version P2 moves to the side opposite to the reference pin 27 against the suction force of the suction pad 45, so the notch 7 of the new version P2 is moved to the reference pin. The new plate P2 is positioned on the holding side vise 25 by being pressed to the 27 side. In S21, the holding side plate vise opening / closing actuator 89 is actuated, whereby the holding side closing of the new plate P2 is performed between the holding plate 25b and the vise stand 25a.

  In S22, the suction pump 86 is deactivated and the suction of the new plate P2 by the suction pad 45 of the plate holder 41 is released, so that the new plate P2 is held only by the holding side plate vise 25 in addition. In S23, when the plate cylinder 20 is rotated by a predetermined amount in the forward direction and stopped in S24, the bottom plate vise opening / closing actuator 90 is actuated in S25, so that the grip plate 26b and the vise stand 26a are moved. As shown in FIG. 17A, the new plate P2 is wound around the plate cylinder 20 by closing the bottom side of the new plate P2. In S26, the plate holder first and second actuators 43A and 43B are both inactivated, and the plate holder 41 is moved from the third position along the guide rail 42 as shown in FIG. 17B. 1 position.

  In S <b> 27, the cover opening / closing actuator 61 is deactivated, and the plate discharge cover 55 closes the plate discharge port 62. In S28, when the plate extrusion actuator 71 is operated, the plate extrusion member 70 protrudes from the window 64 of the fixed cover 57. Therefore, the discharged old plate P1 is moved outside the fixed cover 57 by the plate extrusion member 70. Extruded. In S29, since the safety cover driving motor 87 is driven in the reverse direction, the safety cover 34 is lowered and the front side of the plate cylinder 20 is closed. In S30, the operator ejects the old plate P1 by hand, and in S31, when the plate receiving button 83 is operated to turn it OFF, in S32, the plate receiving driving actuator 78 is deactivated and the plate receiving 75 is rotated. Then, the lower side of the opening 58a is closed. At the same time, the plate extruding actuator 71 is deactivated, and the plate extruding member 70 is accommodated in the fixed cover 57.

  Next, the operation of exchanging the printing plate semi-automatically will be described with reference to FIGS. 10 and 13 and FIGS. In FIG. 10, a method of replacing the printing plate semi-automatically is selected by operating the semi-automatic plate changing button 81 and turning it ON in S2 without operating the fully automatic changing button 80 in S1. In FIG. 13, when the plate change start button 84 is operated and turned on in S40, the safety cover drive motor 87 is driven in the forward direction in S41, and the safety cover 34 is moved from the closed state of FIG. Since it ascends as shown in FIG. 5B, the front side of the plate cylinder 20 is opened. When the plate cylinder 20 is rotated by a predetermined amount in the reverse direction in S42 and the plate cylinder 20 is stopped in S43, the holding-side plate vise opening / closing actuator 89 is operated in S44, and the holding-side plate vise of the plate cylinder 20 is operated. Since 25 holds are opened, the holding on the holding side of the old version P1 is released.

  When the plate cylinder 20 is rotated by a predetermined amount in the reverse direction in S45 and the plate cylinder 20 is stopped in S46, the bottom plate vise opening / closing actuator 90 is actuated in S47, and the bottom plate vise 26 of the plate cylinder 20 is operated. As the mouth opens, the mouth on the bottom side of the old version P1 is released. In S48, when the plate cylinder 20 rotates in the reverse direction, as shown in FIG. 19A, the bottom side of the old plate P1 is detached from the plate cylinder 20, so that the bottom side is moved by hand as shown in FIG. Grab by. Further, when the plate cylinder 20 is rotated approximately once in the reverse direction and the plate cylinder 20 is stopped in S49, the holding side is also detached from the plate cylinder 20, so in S50, the old plate P1 is discharged by hand.

  In S51, the new plate P2 is grasped by hand, and is inserted between the vise base 25a of the holding side plate vise 25 and the holding plate 25b of the plate cylinder 20 as shown in FIG. 20 (a). Button 85 is turned ON. In S53, the holding side plate vise opening / closing actuator 89 is actuated, whereby the holding side closing of the new plate P2 is performed between the holding plate 25b and the vise stand 25a. When the operation button 85 is turned ON again in S54, as shown in FIG. 20B, the plate cylinder 20 is rotated by a predetermined amount in the forward direction in S55, and is stopped in S56. In S57, the bottom plate vise opening / closing actuator 90 is actuated to close the bottom side of the new plate P2 between the holding plate 26b and the vise stand 26a, and the new plate P2 is wound around the plate cylinder 20. It is done. In S58, the safety cover driving motor 87 is driven in the reverse direction, so that the safety cover 34 is lowered and the front side of the plate cylinder 20 is closed as shown in FIG. Instead of the support member 77, a suction pad for sucking the plate bottom of the new version P2 may be provided outside the plate receiver 75 as a member for supporting the plate bottom of the new version P2. In this embodiment, an example is shown in which the present invention is applied to a sheet-fed rotary printing press that prints sheet-like paper, but the present invention can be applied to a web rotary printing press that prints a web.

1 is a schematic configuration diagram illustrating an entire rotary printing press according to the present invention. It is the II arrow directional view in FIG. FIG. 3 is a view taken in the direction of arrow III in FIG. It is a side view which expands and shows the drive part of the plate holder in the rotary printing press which concerns on this invention. FIG. 5 is a view taken in the direction of arrow V in FIG. 4. It is the VI-VI sectional view taken on the line in FIG. It is the VII-VII sectional view taken on the line in FIG. 8A is a cross-sectional view taken along the line VIII (a) -VIII (a) in FIG. 2, and FIG. 8B is a view taken along arrow VIII (b) in FIG. It is a block diagram which shows the structure in the rotary printing press which concerns on this invention. It is a flowchart which shows the operation | movement of plate change in the rotary printing press which concerns on this invention, Comprising: Switching between full-automatic plate change and semi-automatic plate change is shown. It is a flowchart which shows the operation | movement of plate change in the rotary printing press which concerns on this invention, Comprising: The operation | movement of the first half of fully automatic plate change is shown. It is a flowchart which shows the operation | movement of plate change in the rotary printing press which concerns on this invention, Comprising: The operation | movement of the second half of fully automatic plate change is shown. It is a flowchart which shows the operation | movement of plate change in the rotary printing press which concerns on this invention, Comprising: The operation | movement of semi-automatic plate change is shown. FIG. 3 is a cross-sectional view taken along the line XIIII-XIIII in FIG. 2, in which FIG. (A) shows a state in which a new version is mounted on a plate holder in a fully automatic plate change operation, and FIG. Show. FIG. 3 is a cross-sectional view taken along line XIIII-XIIII in FIG. 2, in which FIG. 2A shows a state in which the safety cover is opened in the fully automatic plate change operation, and FIG. 2B shows that the plate holder is moved to the second position. Indicates the state of the FIG. 3 is a cross-sectional view taken along line XIIII-XIIII in FIG. 2, in which FIG. (A) shows a state in which the old plate is removed in the fully automatic plate change operation, and (b) shows that the new plate is inserted into the plate fixing device of the plate cylinder. Indicates the state. FIG. 3 is a cross-sectional view taken along line XIIII-XIIII in FIG. 2, in which FIG. 2A shows a state in which a new plate is wound around a plate cylinder in a fully automatic plate change operation, and FIG. 2B shows a state in which a safety cover is closed. . FIGS. 3A and 3B are cross-sectional views taken along line XIIII-XIIII in FIG. 2, in which FIG. 2A shows a state where the safety cover is closed in the semi-automatic plate changing operation, and FIG. 2B shows a state where the safety cover is opened. FIG. 3 is a cross-sectional view taken along the line XIIII-XIIII in FIG. 2, in which FIG. (A) shows a state in which the old plate is detached from the plate fixing device of the plate cylinder in the semi-automatic plate changing operation, and FIG. It shows the state. FIG. 3 is a cross-sectional view taken along the line XIIII-XIIII in FIG. 2, in which (a) shows a state in which a new version is inserted into the plate fixing device of the plate cylinder in a semi-automatic plate changing operation, and (b) shows a new version The state wrapped around the trunk is shown. FIG. 3 is a cross-sectional view taken along the line XIIII-XIIII in FIG. 2, showing a state where the safety cover is closed in a semi-automatic version changing operation.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Sheet-fed rotary printing machine, 41 ... Plate holder, 75 ... Plate receiver, 77 ... Bearing member, 78 ... Actuator for plate receiving drive, P1 ... Old version, P2 ... New version.

Claims (5)

  In a plate changer in a rotary printing machine that discharges an old plate from a plate fixing device of a plate cylinder and inserts a new plate, a plate holder that holds the new plate and can be moved to the plate insertion position, and an open position that receives the discharged old plate And a plate support supported so as to be movable between the plate position and a closed position, and a support member for supporting the new plate is provided on the outside of the plate support, and when the plate support is in the closed state, A plate changer in a rotary printing press, wherein the new plate is supported outside the plate receiver, and the old plate is supported inside the plate receiver when the plate receiver is in an open state.   2. The plate changer in a rotary printing press according to claim 1, wherein the plate receiver is positioned below the plate cylinder and receives a plate discharged from the plate cylinder and falling.   2. The plate changer in a rotary printing press according to claim 1, wherein the support of the new plate by the support member is released by the movement of the plate receiver from the closed position to the open position.   2. The plate changer in a rotary printing press according to claim 1, wherein the new plate is supported on the tip of the plate receiver by the plate receiver in the open position.   2. A plate changing apparatus for a rotary printing press according to claim 1, further comprising a sensor for detecting that the old plate is received by the plate receiver.

Images