JP2018187781A - Plate, plate cylinder and printing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing plate, a plate cylinder and a plate cylinder capable of preventing damage to the printing plate while maintaining the mounting accuracy of the printing plate on the plate cylinder when the printing plate is attached to the plate cylinder by an automatic printing plate attachment / detachment device. Provide a printing unit. SOLUTION: The printing plate is mounted on a plate cylinder main body having a printing plate mounting groove extending along an axial direction and a register pin provided in the printing plate mounting groove, and an edge portion on a holding side of the printing plate mounting groove. It has a grip side end portion that can be locked to the grip side and a grip side end portion that can be locked to the plate tightening mechanism provided in the plate mounting groove. The end and the buttock side end have a notch that can be engaged with the register pin, and the notch on the buttock side end has a wider opening than the notch on the mouthpiece side end. Has a width. [Selection diagram] Fig. 3

Description

  The present invention relates to a printing plate, a plate cylinder, and a printing unit used in a rotary offset printing press.

  Conventionally, a printing unit used in an offset rotary press for newspapers includes an ink supply device having a large number of ink supply rollers, a dampening water supply device for supplying dampening water, a plate cylinder on which a printing plate is mounted, And a blanket cylinder to which the blanket is mounted. The printing plate used in this printing unit is provided with an oleophilic printed image portion and a hydrophilic non-image portion. The hydrophilic non-image portion is dampened from a dampening water supply device. When ink is supplied from the ink supply device in a state where water is supplied, the ink is applied only to the oleophilic print image line portion. In this printing unit, the ink supplied from the ink supply device is supplied to the blanket cylinder via the plate cylinder, and the blanket cylinder contacts the continuous paper on which the blanket cylinder travels with a predetermined pressure, whereby the printing plate is applied to the continuous paper. The contents (characters, images, etc.) are transferred.

  The conventional plate cylinder 100 is a printing cylinder having a length in the axial direction in which four pages of printing plates 110 can be mounted side by side. As shown in FIGS. 8 and 9, the printing plate is mounted extending along the axial direction. It has a groove 102, an accommodating portion 104 that is an internal space continuous to the plate mounting groove 102, and a register pin 106 (see FIG. 9) provided in the plate mounting groove 102. In the accommodating portion 104, a printing plate clamping mechanism configured to wind the printing plate 110 around the peripheral surface of the plate cylinder 100 by pulling the tail edge side end portion 114 of the printing plate 110 into the printing plate mounting groove 102. (Not shown) is buried. The register pin 106 is a pin member for specifying the mounting position of the printing plate 110 with respect to the plate cylinder 100, and one register pin 106 is provided for one printing plate 110. In FIG. 9, only the area corresponding to the printing plate 110 for one page is shown enlarged.

  The conventional printing plate 110 has a gripping side end portion 112 that can be locked to one gripping side edge portion 102a of the printing plate mounting groove 102 of the plate cylinder 100 at one end portion in the longitudinal direction, and the other end. The plate has a tail edge side end 114 configured to be pulled into the plate mounting groove 102 by the plate clamping mechanism. Cutout portions 113 and 115 that can be fitted to the register pins 106 of the plate cylinder 100 are formed at the tail end portion 112 and the tail end portion 114 of the printing plate 110, respectively. The plate 110 is positioned by fitting the portions 113 and 115 to the register pin 106.

  In such a conventional newspaper rotary offset printing press, the print image is changed by exchanging the printing plate 110. However, such a replacement operation of the printing plate 110 is complicated because it is necessary to perform a plurality of plate cylinders 100 and it is necessary to replace four pages of the printing plate 110 for each plate cylinder 100. There is a problem that the work burden is large.

  In order to solve such a problem, an automatic plate attaching / detaching device that automatically attaches the plate 110 to the plate cylinder 100 has been proposed in recent years (see Patent Document 1). As shown in FIGS. 10 (a) to 10 (d), the automatic plate removing / attaching apparatus of Patent Document 1 is manually prepared on the edge side 102a of the plate cylinder 100 at the edge of the edge of the plate 110 manually. 112, and then the plate cylinder 100 is rotated forward with the swim roller 120 pressed against the plate cylinder 100, thereby passing the printing plate 110 between the plate cylinder 100 and the swim roller 120. The tail edge side end 114 is inserted into the plate mounting groove 102 while being in close contact with the outer peripheral surface of the plate cylinder 100. FIG. 10A shows a state in which the grip-side end portion 112 of the printing plate 110 is locked to the grip-side edge portion 102a of the plate cylinder 100 by manual operation while the plate cylinder 100 is stopped. FIG. 10B shows a state in which the swim roller 120 is brought into pressure contact with the plate cylinder 100. FIG. 10C shows a state in which the plate clamping mechanism is operated by the lever pressing roller of the printing plate automatic attachment / detachment device. FIG. 10D shows that the printing plate 110 is mounted on the plate cylinder 100. Indicates the completed state.

  The automatic printing plate attachment / detachment apparatus of Patent Document 1 has such a configuration, so that the leading edge portion 112 of the printing plate 110 is securely locked to the leading edge portion 102a while the plate cylinder 100 is rotating. Since it is possible to prevent unintentional dropping, the printing plate 110 can be attached in close contact with the outer peripheral surface of the plate cylinder 100. Moreover, the printing plate automatic attachment / detachment apparatus of Patent Document 1 can simplify the apparatus configuration by using the swimsuit roller 120 as a plate pressing roller, as compared with a case where a dedicated plate pressing roller is provided separately. .

Japanese Patent Laid-Open No. 2005-161818

  However, the conventional printing plate 110 has a tail end portion 112 and an end portion 112 in order to prevent mounting defects that are wound obliquely with respect to the circumferential direction of the plate cylinder 100, rattling during printing, and the like. The opening width of the notches 113 and 115 of the tail edge side end portion 114 is formed to have the same size as the width of the register pin 106. Therefore, when the notch 115 of the tail edge side end 114 is fitted to the register pin 106 by the automatic plate attaching / detaching device, the notch 115 of the tail edge side end 114 and the register pin 106 are Even if the position is slightly shifted, the tail edge side end portion 114 may interfere with the register pin 106, which may cause damage to the tail edge side end portion 114 or poor registration accuracy due to poor mounting of the printing plate 110. is there. In addition, if printing is started in a state where the tail edge side end portion 114 interferes with the register pin 106, an accident such as plate breakage may occur due to stress concentration on the interference portion.

  On the other hand, if the opening widths of the notches 113 and 115 of the tail end portion 112 and the tail end portion 114 are formed larger than the width of the register pin 106 in order to avoid interference with the register pin 106, the plate cylinder 100. In addition, there is a possibility that the tape may be wound obliquely, and rattling may occur at the time of printing operation, which causes a problem that it is difficult to maintain the mounting accuracy with respect to the plate cylinder 100.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to improve the mounting accuracy of the printing plate with respect to the plate cylinder when the printing plate is mounted on the plate cylinder by the automatic printing plate attachment / detachment device. An object of the present invention is to provide a printing plate, a plate cylinder, and a printing unit capable of preventing damage to the printing plate while maintaining them.

  The printing plate according to the present invention is a printing plate to be mounted on a plate cylinder body having a printing plate mounting groove extending in the axial direction and a register pin provided in the printing plate mounting groove, and the printing plate mounting groove A tail end portion configured to be able to be locked to the grip side edge portion, and a tail end side portion configured to be capable of being locked to a printing plate clamping mechanism provided in the plate mounting groove. The tail end and the tail end have a notch that can be engaged with the register pin, and the notch at the tail end has the notch It has an opening width wider than the notch at the tail end.

  A plate cylinder according to the present invention includes the above-described printing plate, a plate cylinder main body having a plate mounting groove extending in the axial direction and a register pin provided in the plate mounting groove, and the printing of the plate cylinder main body. A plate cylinder provided with a plate clamping mechanism provided in a plate mounting groove, wherein the notch portion of the end on the grip side has an opening width that is the same as the width of the register pin. And

  The printing unit according to the present invention includes an ink supply for supplying ink to the printing blanket of the blanket cylinder via the plate cylinder described above, a blanket cylinder on which a printing blanket is mounted, and the printing plate of the plate cylinder. A printing unit comprising an apparatus and an automatic plate attaching / detaching device for attaching / detaching the printing plate to / from the plate cylinder main body, wherein the plate automatic attaching / detaching device is installed when the printing plate is attached to the plate cylinder main body. Pressing the printing plate against the plate cylinder body rotating in the forward direction in a state where the holding side end portion of the printing plate is locked to the holding edge portion of the printing plate mounting groove; and The notch portion formed at the tail edge side end is pushed into the register pin by pushing the tail edge side end of the plate reaching the plate mounting groove into the plate mounting groove. Features configured to engage To.

  According to the present invention, when the printing plate is mounted on the plate cylinder by the automatic plate removing / attaching device, the printing plate capable of preventing the damage of the printing plate while maintaining the mounting accuracy of the printing plate with respect to the plate cylinder, A plate cylinder and a printing unit can be provided.

It is a figure which shows schematic structure of the printing unit which concerns on this embodiment. It is a figure which shows schematic structure of the plate cylinder and printing plate automatic attachment / detachment apparatus which concern on this embodiment. It is a figure which shows schematic structure of the printing plate which concerns on this embodiment. FIG. 4A is a side view showing a schematic configuration of the printing plate pressing mechanism in the retracted state, and FIG. 4B is a side view showing a schematic configuration of the printing plate pressing mechanism in the advanced state. FIG. 5A to FIG. 5C are process diagrams schematically showing states of the printing plate pressing mechanism, the plate cylinder, and the printing plate in the plate-engaging process. FIG. 6A is a side view showing a schematic configuration of the printing plate attaching / detaching operation mechanism when the printing plate is mounted on the plate cylinder, and FIG. 6A shows a schematic configuration of the printing plate attaching / detaching operation mechanism in the retracted state; b) shows a schematic configuration of the printing plate attaching / detaching operation mechanism in the advanced state. FIG. 7A is a side view showing a schematic configuration of the printing plate attaching / detaching operation mechanism when the printing plate is removed from the plate cylinder, and FIG. 7A shows a schematic configuration of the printing plate attaching / detaching operation mechanism in the retracted state; b) shows a schematic configuration of the printing plate attaching / detaching operation mechanism in the advanced state. It is a figure which shows schematic structure of the conventional plate cylinder and a printing plate. It is a figure which expands and shows the schematic structure of the conventional plate cylinder and a printing plate partially. FIG. 10A to FIG. 10D are diagrams showing a schematic configuration of a printing plate automatic attaching / detaching device described in Patent Document 1. FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

  The rotary offset printing press according to this embodiment includes a continuous paper supply unit (not shown) for setting roll paper obtained by winding continuous paper (printed body) in a roll shape, and continuous paper supplied from the continuous paper supply unit. A plurality of printing units 1a and 1b that perform offset printing on both sides of the sheet, and continuous sheets after the offset printing are cut to form individual sheet-like sheets, and are composed of one sheet-like sheet or a plurality of sheet-like sheets. A folding machine (not shown) that folds a sheet-like sheet group to form a signature, and a post-processing mechanism (not shown) that accumulates by performing predetermined processing such as folding the signature formed by the folding machine into two. ), One or a plurality of control units (not shown) that execute various controls of each component, and a setting input unit (not shown) for inputting various setting information. In the offset rotary printing press according to the present embodiment, various known ones can be arbitrarily used as the continuous paper supply unit, the folding machine, the post-processing mechanism, the control unit, and the setting input unit. Omitted.

  As shown in FIG. 1, each of the upper printing unit 1a and the lower printing unit 1b includes a pair of ink supply devices 4 having a large number of ink supply rollers, and a pair of dampening water supply devices 5 for supplying dampening water. , A pair of plate cylinders 2 to which the printing plates 7A to 7D are mounted, a pair of blanket cylinders 3 to which a printing blanket (not shown) is mounted, and a printing plate disposed close to the operation-side plate cylinder 2 An automatic plate attaching / detaching device 10 is provided. In addition, the upper printing unit 1a and the lower printing unit 1b include a printing control unit (not shown) that executes various types of control as a common configuration. In the printing units 1a and 1b, the ink supplied from the ink supply device 4 is supplied to the printing blanket of the blanket cylinder 3 via the printing plates 7A to 7D of the printing cylinder 2 in the same manner as the conventional printing unit, and printing is performed. By contacting the continuous paper (printed material) on which the blanket for travel is brought into contact with a predetermined pressure, the contents of the printing plate (characters, images, etc.) are transferred to the continuous paper. In the offset rotary printing press according to this embodiment, the ink supply device 4, the fountain solution supply device 5, and the blanket cylinder 3 can be arbitrarily selected from various known ones, and thus description thereof is omitted.

  As shown in FIG. 2, the plate cylinder 2 has a linear printing plate mounting groove 6b extending in the axial direction and a housing portion (not shown) that is an internal space extending radially inward from the printing plate mounting groove 6b. A cylindrical plate cylinder body 6 formed with a plate, a printing plate clamping mechanism 50 embedded in a receiving portion of the plate cylinder body 6, and a printing plate mounted on the outer peripheral surface of the plate cylinder body 6 by the printing plate clamping mechanism 50. 7A-7D.

  The plate cylinder main body 6 is a printing cylinder formed in a columnar shape, and as shown in FIG. 2, mounting shafts 6a provided at both ends and four pages of printing plates 7A to 7D are arranged in the axial direction. A peripheral surface having a mountable printing plate mounting region R, a printing plate mounting groove 6b extending in the axial direction, a housing portion (not shown) which is an internal space continuous to the printing plate mounting groove 6b, and the printing plate It has an operation opening 6c formed on the end side of the mounting region R, and a plurality of (four in this embodiment) register pins 6d provided in the plate mounting groove 6b. In this embodiment, the plate cylinder main body 6 has an axial length (W) whose circumferential surface is substantially equal to four times the horizontal length of one newspaper page, and the vertical length of one newspaper page. This is a so-called 4 (W) × 1 (L) type plate cylinder having substantially the same circumferential length (L).

  As shown in FIG. 2, the plate cylinder main body 6 has a rotational drive in which attachment shafts 6a at both ends are attached to a pair of frames F and F via bearings (not shown) and connected to one attachment shaft 6a. It is configured to be rotationally driven at a predetermined speed by means (not shown).

  The register pin 6d is a pin member for specifying the mounting positions of the printing plates 7A to 7D with respect to the plate cylinder body 6, and is one for each printing plate (in this embodiment, one printing plate for one page). Since four sheets are mounted side by side in the axial direction, four are provided at predetermined intervals in the axial direction of the plate cylinder body 6. The width of the register pin 6d is the same size as the opening width W1 of the notch 8a of the tail end 7a of the printing plates 7A to 7D, and the cut edge 7b of the printing plates 7A to 7D is cut. It has a size smaller than the opening width W2 of the notch 8b. The width W1 of the register pin 6d can be arbitrarily set, and can be set to 8.5 mm, for example.

  A printing plate configured to wind the printing plates 7A to 7D around the peripheral surface of the plate cylinder main body 6 by drawing the tail edge side end portion 7b of the printing plates 7A to 7D into the printing plate mounting groove 6b. A plate clamping mechanism 50 is embedded. The operation opening 6 c is an opening for operating the first to fourth operation mechanisms 52 a to 52 d of the printing plate clamping mechanism 50. In the rotary offset printing press according to the present embodiment, various well-known printing cylinder bodies 6 can be arbitrarily used, and thus detailed description thereof is omitted.

  The printing plates 7A to 7D are formed of a flexible metal thin plate material having a size corresponding to one page of a newspaper, and as shown in FIG. There is a grip-side end portion 7a that can be locked to one edge portion (the grip-side edge portion) of the printing plate mounting groove 6b, and the other end portion is placed in the printing plate mounting groove 6b by the printing plate clamping mechanism 50. The tail edge side end portion 7b is configured to be drawn into. Notches 8a and 8b that can be engaged with the register pins 6d of the plate cylinder body 6 are formed at the tail end 7a and the tail end 7b of the printing plates 7A to 7D, respectively. The plates 7A to 7D are positioned by engaging the notches 8a and 8b with the register pin 6d.

  The notch portion 8a of the gripper side end portion 7a of the printing plates 7A to 7D has an opening width W1 having the same dimension as the width of the register pin 6d, and is configured to fit into the register pin 6d without a gap. Yes. The notch 8b at the tail edge 7b of the printing plates 7A to 7D has an opening width W2 wider than the width of the register pin 6d and the opening width W1 of the notch 8a at the tail end 7a. It is configured to be fitted to the register pin 6d with a slight gap between the register pin 6d and the register pin 6d. Here, the “same dimension” means a dimension in which the notch portion 8a of the grip-side end portion 7a of the printing plates 7A to 7D is fitted into the register pin 6d without a gap.

  Such an opening width W2 of the cutout portion 8b of the tail end 7b can be arbitrarily set. However, the difference between the opening width W2 of the notch portion 8b of the tail end 7b and the width of the register pin 6d and the opening width W1 of the notch portion 8a of the tail end 7a is less than 0.5 mm. If it exists, compared with the case where the said difference is set to 0.5 mm or more, the notch part 8b of the tail edge side edge part 7b becomes easy to interfere with the register pin 6d. Further, when the difference exceeds 1.5 mm, it becomes difficult to maintain the mounting accuracy of the printing plates 7A to 7D with respect to the plate cylinder main body 6 as compared with the case where the difference is set to 1.5 mm or less. . Therefore, the opening width W2 of the cutout portion 8b of the tail end 7b is 0.5 mm to 1.5 mm larger than the width of the register pin 6d and the opening width W1 of the cutout portion 8a of the tail end 7a. It is preferable to set a value that is about 1 mm larger, for example. For example, when the width of the register pin 6d and the opening width W1 of the notch 8a of the tail end 7a are set to 8.5 mm, the opening of the notch 8b of the tail end 7b is set. The width W2 can be set to an opening width of about 9.5 mm, that is, an opening width in which a gap of about 0.5 mm is formed between both sides of the register pin 6d.

  The printing plate clamping mechanism 50 includes a locking bar member (not shown) configured by connecting four angular displacement axes (not shown) along the axial direction so as to be coaxial, and a locking bar. This is a so-called lock-up type plate clamping device provided with four operation mechanisms (first to fourth operation mechanisms 52a to 52d) for independently rotating each angular displacement axis of the member. Each of the four angular displacement axes has an axial length substantially equal to the horizontal length of one page of the newspaper, and the tail edge side ends 7b of the printing plates 7A to 7D can be respectively locked. It is configured. Further, the four angular displacement axes are connected to different operation mechanisms (first to fourth operation mechanisms 52a to 52d), respectively, and by operating the connected operation mechanisms, each of them is independently centered on the axis. The printing plates 7A to 7D are configured to rotate (angular displacement) in the direction of pulling or loosening. As shown in FIG. 2, each of the first to fourth operation mechanisms 52 a to 52 d includes an operation lever 54 for operating the corresponding angular displacement shaft, and printing is performed by operating the operation lever 54. Between the mounting position where the plates 7A to 7D are tightened on the outer peripheral surface of the plate cylinder body 6, and the release position where the engagement between the locking bar member and the tail edge side end portion 7b of the printing plates 7A to 7D is released In FIG. 5, the corresponding angular displacement axis is angularly displaced. In the offset rotary printing press according to the present embodiment, various well-known printing plate clamping mechanisms 50 can be arbitrarily used, and thus detailed description thereof is omitted.

  As shown in FIG. 1, the automatic plate removing / attaching apparatus 10 is configured so that the plate cylinder 2 places plate end positions 7a to 7D of the printing plates 7A to 7D at the plate-hanging positions (described later) of the plate mounting groove 6b. The plate 7A to 7D can be automatically mounted on the plate cylinder 2 at a position aligned with the plate mounting groove 6b in a state where the plate is stopped at a position where it can be locked). In addition, the printing plates 7A to 7D can be automatically removed from the plate cylinder 2.

  Specifically, as shown in FIG. 2, the automatic plate removing / attaching apparatus 10 has a fixed base member 12 suspended between a pair of frames F and F via a pair of left and right brackets 14 and a plate cylinder 2. A plurality of (four in this embodiment) printing plate pressing mechanisms 20a to 20d and printing plate attaching / detaching operation mechanisms 30a to 30d attached to the fixed base member 12 in a state where they can advance and retreat, and the front surface of the fixed base member 12 is covered. And a front cover 16 (see FIGS. 4 and 5) attached in this manner.

  As shown in FIG. 2, the press plate holding mechanisms 20 a to 20 d are respectively attached to the air cylinder 22 attached to the inner surface (lower surface) of the upper surface portion of the fixed base member 12 and the tip of the cylinder rod 23 of the air cylinder 22. Movable base member 24, guard bracket 26 (see FIGS. 4 and 5) fixed to movable base member 24, guard member 27 (see FIGS. 4 and 5) attached to guard bracket 26, and movable A plurality of pressing roller members 28a and 28b attached to the base member 24 are provided. The printing plate pressing mechanisms 20a to 20d are provided so as to correspond to the printing plates 7A to 7D on a one-to-one basis, and are configured to be independently operable.

  As shown in FIG. 2, the movable base member 24 is formed of a long thin plate member having a length substantially equal to the lateral length of each of the printing plates 7 </ b> A to 7 </ b> D. It is comprised so that it may approach or space apart from 2. As shown in FIGS. 4 and 5, a guard bracket 26 is attached to the lower surface of each movable base member 24 so as to protrude downward at the front end edge portion, and at the rear side of the guard bracket 26. A plurality of pressing roller members 28a and 28b are attached to the region. On the upper surface of each movable base member 24, a shaft 13b guided by a linear bush 13a fixed to the inner surface (front surface) of the back surface portion of the fixed base member 12 is provided.

  The guard bracket 26 functions as a finger guard for preventing a finger or the like from being accidentally caught between the plate cylinder 2 and the pressing roller members 28a and 28b when the printing plates 7A to 7D are attached to and detached from the plate cylinder main body 6. It is configured as follows. The guard member 27 is formed of a material that is more flexible than the guard bracket 26, for example, a resin material such as polyamide, and the plates 7A to 7D are attached to the guard bracket 26 when the plates 7A to 7D are attached to and detached from the plate cylinder body 6. Is configured to function as a guard to prevent direct contact and damage.

  As shown in FIG. 2, the plurality of presser roller members 28a and 28b are arranged in the longitudinal direction centered on one central presser roller member 28a disposed at the approximate center in the longitudinal direction of the movable base member 24 and the central presser roller member 28a. And two peripheral presser roller members 28b that are spaced apart from each other. The central pressing roller member 28a and the peripheral pressing roller member 28b have the same diameter, and the plate is moved with a uniform pressing force when the movable base member 24 approaches the circumferential surface of the plate cylinder 2 (advance position). The printing plates 7 </ b> A to 7 </ b> D can be pressed against the peripheral surface of the trunk body 6. As shown in FIGS. 4 and 5, the two peripheral pressing roller members 28 b are arranged in alignment along the axial direction of the plate cylinder 2 so that the rotation axes are coaxial with each other. On the other hand, the center pressing roller member 28a is arranged with a position shifted by a minute distance x (for example, 1 to 5 mm) on the upstream side in the forward direction of the plate cylinder 2 relative to the two peripheral pressing roller members 28b. In addition, as the pressing roller members 28a and 28b, for example, a cylindrical urethane roller having a diameter of 25 mm can be preferably used, but is not limited thereto. Moreover, the position and number of the center pressing roller member 28a and the peripheral pressing roller member 28b can be changed to an arbitrary number and position as necessary.

  The printing plate pressing mechanisms 20a to 20d according to the present embodiment have the above-described configuration, so that the printing plates 7A to 7D are mounted on the plate cylinder body 6 as shown in FIGS. 4 and 5, for example. A plurality of pressing roller members 28a, 28b against the plate cylinder body 6 that rotates in the forward direction with the end portions 7a of the printing plates 7A to 7D engaged with the end portions of the mounting grooves 6b. Is configured to press the plates 7A to 7D. At this time, in the press plate pressing mechanisms 20a to 20d according to the present embodiment, the center press roller member 28a is arranged at a position shifted upstream in the forward direction of the plate cylinder 2 from the peripheral press roller member 28b. Prior to the peripheral pressing roller member 28b, the central pressing roller member 28a can press the substantially central portion in the lateral direction of the printing plates 7A to 7D. Thus, in the state in which the printing plates 7A to 7D are pressed against the peripheral surface of the plate cylinder main body 6 with a uniform pressing force by the central pressing roller member 28a and the peripheral pressing roller member 28b, the peripheral pressing roller member 28a can press each peripheral pressing member. Since a pressing force can be applied to the printing plates 7A to 7D in the direction toward the roller member 28b, that is, in the direction from the lateral center of the printing plates 7A to 7D toward both ends, the printing plate The mounting accuracy of 7A to 7D can be improved.

  Further, as shown in FIG. 5C, for example, the press plate holding mechanisms 20a to 20d according to the present embodiment center the tail edge side end portion 7b of the press plates 7A to 7D reaching the press plate mounting groove 6b. The notch 8b formed in the tail edge 7b is fitted into the register pin 6d by being pushed into the plate mounting groove 6b by the pressing roller member 28a. At this time, in the printing plate pressing mechanisms 20a to 20d according to the present embodiment, as described above, the central pressing roller member 28a allows the central plate roller members 28a to form substantially central portions in the lateral direction of the printing plates 7A to 7D, as described above. Since it is configured to press, the center pressing roller member 28a presses the vicinity of the tail edge side end portion 7b of the printing plates 7A to 7D toward the printing plate mounting groove 6b, and the register pin 6d of the plate cylinder main body 6 is pressed. It is possible to smoothly and reliably perform the fitting of the tail edge side end portion 7b to the.

  Furthermore, the printing plate pressing mechanisms 20a to 20d according to the present embodiment are provided on the edge portions of the printing plate mounting groove 6b at the gripping side edge portions even when the printing plates 7A to 7D are detached from the plate cylinder body 6. The plate plates 7A to 7D are pressed against the plate cylinder main body 6 that rotates in the opposite direction with the grip-side end portion 7a locked, by a plurality of pressing roller members 28a and 28b. It is configured to suppress fluttering.

  As shown in FIG. 2, the plate attaching / detaching operation mechanisms 30 a to 30 d are provided one by one via the bracket 32 at positions aligned with the first to fourth operation mechanisms 52 a to 52 d. Each of the plate attaching / detaching operation mechanisms 30a to 30d includes an air cylinder 34 attached to the bracket 32 and a lever pressing member 38 attached to the tip of the cylinder rod 36 of the air cylinder 34. The lever pressing member 38 is configured to advance and retreat with respect to the plate cylinder 2 by the advance / retreat operation.

  As shown in FIG. 6, the printing plate attaching / detaching operation mechanisms 30a to 30d are configured so that the leading edge portions 7a of the printing plates 7A to 7D are engaged with the leading edge portions of the printing plate mounting grooves 6b, so that the printing plate mounting grooves are provided. The lever pressing member 38 moves forward with respect to the plate cylinder 2 in a state where the tail edge 7b is pushed into 6b, and the operation lever 54 of the corresponding operation mechanism (first to fourth operation mechanisms 52a to 52d). By pushing down the front end side of the plate downward (inward in the radial direction of the plate cylinder 2), the corresponding angular displacement shaft is rotated in the tightening direction so that the plates 7A to 7D are automatically mounted on the peripheral surface of the plate cylinder 2. It is configured.

  Further, as shown in FIG. 7, the plate attaching / detaching operation mechanisms 30a to 30d are configured such that the lever pressing member 38 moves forward with respect to the plate cylinder 2 in a state in which the printing plates 7A to 7D are attached, 1 to the fourth operation mechanisms 52a to 52d) by pushing down the base end side of the operation lever 54 downward (inward in the radial direction of the plate cylinder 2), the lock of the operation lever 54 is released, and the angle at which the lock is released The displacement shaft is rotated in a direction opposite to the tightening direction, whereby the engagement between the locking bar member of the printing plate clamping mechanism 50 and the tail edge side end portion 7b of the printing plates 7A to 7D is released. Has been.

  The printing control unit is a PLC (Programmable Logic Controller) in the present embodiment, and includes various controls including rotation control of the plate cylinder 2 and operation control of the printing plate pressing mechanisms 20a to 20d and the printing plate attaching / detaching operation mechanisms 30a to 30d. The print control can be executed. Specifically, the printing control unit removes the plate cylinder 2 in each plate attachment / detachment process based on information (rotation speed, rotation position, etc.) of the rotation operation of the plate cylinder 2 detected by a rotation position detector such as an encoder. It is configured to accurately stop at a predetermined stop position. Further, the printing control unit appropriately sets each of the plate pressing mechanisms 20a to 20d and each of the plate attachment / detachment operation mechanisms 30a to 30d in accordance with the rotation operation of the plate cylinder 2 based on the information on the rotation operation of the plate cylinder 2. It is configured to operate independently at timing.

  Between the pair of frames F, F of the lower printing unit 1b, as shown in FIG. 1, a plate hanging position button (not shown), a plate hanging preparation button (not shown), and a plate hanging button (not shown) ) And a plate removal button (not shown) are provided. The printing control unit automatically operates the plate cylinder 2 and the printing plate automatic attachment / detachment device 10 when these buttons are pressed by an operator or an execution instruction is received from the setting input unit, thereby Arbitrary printing plates 7A to 7D can be automatically attached to and detached from (removed from) the cylinder body 6. Further, the operation unit 9 includes a plate holding mechanism that is operated from the plate holding mechanisms 20a to 20d and the plate attaching / detaching operation mechanisms 30a to 30d provided in the upper printing unit 1a and the lower printing unit 1b, respectively. Surface selection buttons (not shown) for selecting 20a to 20d and the plate attaching / detaching operation mechanisms 30a to 30d are further arranged.

  Next, a method for automatically attaching and detaching the printing plates 7A to 7D to the plate cylinder body 6 using the automatic printing plate attaching / detaching apparatus 10 according to the present embodiment will be described.

  First, when the operator presses the plate position button of the operation unit 9, the plate cylinder body 6 rotates in the forward direction to the plate position and stops. In this state, as shown in FIG. 4A, the gripper side end portion 7a of the printing plates 7A to 7D is locked by the operator to the gripping side edge portion of the printing plate mounting groove 6b (plate hanging). Preparation step). Next, as shown in FIG. 4 (b), the press plate preparation mechanism 20 a to 20 d in the “disengaged” state is pressed against the plate cylinder body 6 by pressing the plate preparation button by the operator. The printing plates 7A to 7D are pressed against the peripheral surface of the plate cylinder main body 6 by the plurality of pressing roller members 28a and 28b (pressing plate pressing mechanism advancement step). Thereafter, when the operator presses the plate hanging button, as shown in FIGS. 5 (a) to 5 (c), the plate cylinder body 6 is in the tightening position (the tip of the operation lever 54 is the lever pressing member 38). 1) in the forward direction (positioning process). Thereby, the printing plates 7A to 7D are tightly wound around the outer peripheral surface of the plate cylinder body 6, and the tail edge side end portion 7b of the printing plates 7A to 7D is placed in the printing plate mounting groove 6b by the center pressing roller member 28a. The notched portion 8b of the tail end 7b is fitted into the register pin 6d. After the plate cylinder main body 6 stops at the tightening position, as shown in FIGS. 6A and 6B, the plate attachment / detachment operation mechanisms 30a to 30d move forward with respect to the plate cylinder main body 6, The tip of the operation lever 54 of the plate clamping mechanism 50 of the plate cylinder 2 is pushed down by the protruding portion of the lever pressing member 38 (plate mounting step). As a result, the corresponding angular displacement shaft rotates in the tightening direction, and the tail edge side end portion 7 b of the printing plates 7 </ b> A to 7 </ b> D is drawn into the plate cylinder 2, so that the printing plate is placed on the outer peripheral surface of the plate cylinder body 6. 7A to 7D are automatically mounted. After the mounting of the printing plates 7A to 7D to the plate cylinder main body 6 is completed, the printing plate pressing mechanisms 20a to 20d and the printing plate attaching / detaching operation mechanisms 30a to 30d are retracted from the plate cylinder 2 (press plate automatic attaching / detaching device retracting step). Thereby, a series of operation | movement of the printing plate automatic attachment or detachment apparatus 10 regarding mounting | wearing of printing plates 7A-7D is complete | finished.

  Then, after the predetermined printing is completed, only the printing plates 7A to 7D to be subjected to the plate change are obtained by the operator pressing the plate removal button or outputting an execution instruction via the setting input unit. Is automatically removed from the plate cylinder body 6. Specifically, first, the plate cylinder main body 6 rotates in the forward direction until it reaches the tail edge removal position (a position where the base end portion of the operation lever 54 is aligned with the protruding portion of the lever pressing member 38). Further, after the plate cylinder main body 6 stops at the tail edge removal position, the plate holding mechanisms 20a to 20d of the automatic plate removing / attaching apparatus 10 move forward with respect to the plate cylinder main body 6, and a plurality of pressing roller members 28a, The printing plates 7A to 7D are pressed against the outer peripheral surface of the plate cylinder body 6 by 28b (pressing plate pressing mechanism advancing step). Then, after the printing plate pressing mechanisms 20a to 20d have moved forward, as shown in FIGS. 7A and 7B, the printing plate attaching / detaching operation mechanism 30a corresponding to the printing plates 7A to 7D to be changed. Only ~ 30d moves forward with respect to the plate cylinder main body 6, and the base end portion of the operation lever 54 of the printing plate clamping mechanism 50 is pushed down by the protruding portion of the lever pressing member 38 (lock releasing step). As a result, the lock of the operation lever 54 is released, and the corresponding angular displacement shaft rotates in the direction opposite to the tightening direction, so that the latch plates and the plates 7A to 7D to be replaced are prepared. The engagement with the buttocks end 7b is released. Then, after the engagement between the locking bar member and the tail edge side end portion 7b is released, the plate attaching / detaching operation mechanisms 30a to 30d that have moved forward are retracted from the plate cylinder 2 (the plate attaching / detaching operation mechanism is retracted). Step), until the plate cylinder main body 6 reaches a gripping removal position (a position where the gripping side end portion 7a of the printing plates 7A to 7D can be removed from the gripping edge portion of the printing plate mounting groove 6b). It rotates in the reverse direction (reverse direction rotation process). Further, after the plate cylinder 2 is stopped at the gripping and removing position, only the plate pressing mechanisms 20a to 20d corresponding to the printing plates 7A to 7D to be changed are moved backward from the plate cylinder main body 6 (press plate pressing). Mechanism retraction process). As a result, the operator can remove the prepared side end portions 7a of the printing plates 7A to 7D to be changed from the prepared edge portion of the printing plate mounting groove 6b, and remove the printing plates 7A to 7D. The series of operations of the automatic plate removing / attaching apparatus 10 is completed.

  As described above, in the printing plates 7A to 7D according to the present embodiment, the notch portion 8a of the tail end 7a has the opening width W1 of the same size as the width of the register pin 6d, and the tail edge side. The notch portion 8b of the end portion 7b has an opening width W2 wider than the width of the register pin 6d and the opening width W1 of the notch portion 8a of the grip-side end portion 7a.

  According to the printing plates 7A to 7D having such a configuration, only the notch portion 8b of the tail edge side end portion 7b is intentionally formed wide so that the plate cylinder main body 6 can be formed by the automatic printing plate attaching / detaching device 10. Even when the printing plates 7A to 7D are mounted, it is possible to prevent damage to the printing plates 7A to 7D while maintaining the mounting accuracy of the printing plates 7A to 7D with respect to the plate cylinder body 6.

  That is, in the printing plates 7A to 7D according to the present embodiment, the notch portion 8b of the tail edge side end portion 7b is formed wide so that the notch portion 8b of the tail edge side end portion 7b and the register pin 6d are formed. Even if the position is slightly shifted, the notch portion 8b of the tail end 7b can be engaged with the register pin 6d without interfering with the register pin 6d. Thereby, compared with the conventional printing plate 110 in which the notch portion 8b of the tail edge side end portion 7b is formed to have the same size as the width of the register pin 6d, the tail edge side edge portion 114 is damaged or is removed. It is possible to prevent cutting, and it is possible to prevent poor registration accuracy due to poor mounting of the printing plate 110.

  Further, in the printing plates 7A to 7D according to the present embodiment, the notch portion 8a of the tail end 7a is not formed wide, but is formed with an opening width W1 having the same dimension as the width of the register pin 6d. Since the positioning can be accurately performed at the notch 8a of the tail end 7a, the notch 8a of the tail end 7a and the notch 8b of the tail end 7b Compared with the case where both are formed wide, the phenomenon that the printing plates 7A to 7D wind around the plate cylinder body 6 and the rattling at the time of printing operation is prevented, and the mounting accuracy to the plate cylinder body 6 is improved. Can be maintained.

  The preferred embodiment of the present invention has been described above, but the technical scope of the present invention is not limited to the scope described in the above-described embodiment. Various modifications or improvements can be added to the above embodiments.

  For example, in the above description of the embodiment, the plate cylinder 2 has been described as a so-called 4 (W) × 1 (L) type plate cylinder. However, the present invention is not limited to this, and for example, the so-called 4 (W) × Various plate cylinders such as a 2 (L) type cylinder can be used. Further, although it has been described that the printing plates 7A to 7D have a size corresponding to one page of the newspaper and are mounted side by side along the axial direction of the plate cylinder 2, the present invention is not limited to this. Various printing plates such as a printing plate having a size corresponding to two pages can be used.

  The printing plate clamping mechanism 50 is not limited to the configuration according to the above-described embodiment, and various arbitrary configurations can be adopted. Further, the printing plate automatic attachment / detachment apparatus 10 is not limited to the configuration according to the above-described embodiment, and may be various types as long as the printing plates 7A to 7D can be automatically attached to and detached from the plate cylinder body 6. Any configuration can be adopted.

  In the above-described embodiment, the plate pressing mechanisms 20a to 20d are described as being provided in a one-to-one relationship with the printing plates 7A to 7D. However, the present invention is not limited to this, and, for example, one for a plurality of printing plates. A configuration in which one printing plate pressing mechanism is provided or a configuration in which a plurality of printing plate pressing mechanisms are provided for one printing plate may be employed.

  In the above-described embodiment, it is assumed that when the plate removal button is pressed or when an execution instruction is received from the setting input unit, the plate cylinder 2 and the automatic printing plate attaching / detaching device 10 execute the plate removing operation. However, the present invention is not limited to this, and when the printing operation is completed, the plate cylinder 2 and the plate automatic detaching device 10 are automatically operated based on preset plate change information, and the plates 7A to 7A to be subjected to plate change. A configuration in which the process of removing 7D from the plate cylinder main body 6 may be executed, or a configuration in which all the printing plates 7A to 7D are automatically removed when the printing operation is completed may be employed.

  It is clear from the description of the scope of claims that the above modifications are included in the scope of the present invention.

  1a, 1b Printing unit, 2 printing cylinder, 3 blanket cylinder, 4 ink supply device, 6 printing cylinder body, 6b printing plate mounting groove, 6d register pin, 7A to 7D printing plate, 7a custom side edge, 7b customizing Notch at the tail end, 8a Notch at the tail end, 8b Notch at the tail end, 10 Plate automatic attachment / detachment device, 50 Plate clamping mechanism, W1 Notch at the tail end Opening width, W2 Opening width of the notch at the tail edge side

Claims (3)

A printing plate mounted on a plate cylinder main body having a printing plate mounting groove extending in the axial direction and a register pin provided in the printing plate mounting groove,
A grip side end portion configured to be able to be locked to a grip side edge portion of the plate mounting groove,
A tail edge side end portion configured to be able to be locked to a plate tightening mechanism provided in the plate mounting groove, and
The tail end and the tail end have a notch that can be engaged with the register pin,
The printing plate, wherein the cutout portion of the tail edge side end portion has a wider opening width than the cutout portion of the tail edge side portion. A printing plate according to claim 1;
A plate cylinder main body having a printing plate mounting groove extending along the axial direction and a register pin provided in the printing plate mounting groove;
A plate cylinder provided with a plate clamping mechanism provided in the plate mounting groove of the plate cylinder body,
The plate cylinder, wherein the notch portion of the grip end has an opening width that is the same as the width of the register pin. A plate cylinder according to claim 2;
A blanket cylinder to which a printing blanket is mounted;
An ink supply device for supplying ink to the printing blanket of the blanket cylinder through the printing plate of the plate cylinder;
A printing unit equipped with a printing plate automatic attachment / detachment device for attaching / detaching the printing plate to / from the plate cylinder body,
When the plate is mounted on the plate cylinder main body, the plate automatic attachment / detachment device is in a state in which the platen side edge of the plate is locked to the platen side edge of the plate mounting groove. Pressing the printing plate against the plate cylinder body rotating in the forward direction, and pushing the tail edge side end portion of the printing plate that has reached the printing plate mounting groove into the printing plate mounting groove; A printing unit, wherein the cutout portion formed at the tail end side end portion is configured to engage with the register pin.

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