JP2017109440A - Plate automatic loading device and web offset press - Google Patents

Abstract

A printing plate automatic loading device and an offset rotary printing press capable of improving the printing plate mounting accuracy with respect to a plate cylinder. When a printing plate is mounted on a plate cylinder, a plurality of pressers against the plate cylinder rotating in the forward direction with the edge of the printing plate being held at the edge of the printing plate mounting groove. The plate is pressed against the register pin by pressing the printing plate with a roller member and pushing the edge of the printing plate that has reached the printing plate mounting groove into the printing plate mounting groove with a pressing projection. It is comprised so that the notch part formed in the bottom side edge part may be fitted. [Selection] Figure 5

Description

  The present invention relates to a printing plate automatic loading apparatus for automatically loading a printing plate onto a plate cylinder, and an offset rotary printing press including the same.

  Conventionally, a printing unit used in a web offset press for newspapers includes an ink supply device having a large number of ink supply rollers, a plate cylinder on which a printing plate is mounted, and a blanket cylinder on which a blanket is mounted. The ink supplied from the ink supply device is supplied to the blanket cylinder through the plate cylinder, and the contents of the printing plate (characters, images, etc.) on the continuous sheet by contacting the continuous sheet on which the blanket cylinder travels with a predetermined pressure. Is configured to be transferred.

  A 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 FIG. 18, a plate mounting groove 102 extending in the axial direction and The housing portion 104 is an internal space continuous to the plate mounting groove 102 and the register pin 106 provided in the plate mounting groove 102. In FIG. 18, only the area corresponding to the printing plate 110 for one page is shown enlarged. 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. One register pin 106 is provided for one printing plate 110. In addition, the conventional printing plate 110 is provided in the printing plate mounting groove 102 by a plate-side end portion 112 that can be locked to one edge portion 102a of the printing plate mounting groove 102 of the plate cylinder 100 and a printing plate clamping mechanism. And a tail edge end 114 configured to be retracted. The notch 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 edge 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 problems, in recent years, an automatic printing plate mounting apparatus that automatically mounts the printing plate 110 on the plate cylinder 100 has been proposed (see Patent Document 1). As shown in FIG. 19, the automatic plate mounting apparatus of Patent Document 1 includes a cylindrical portion 122 extending in a direction parallel to the plate cylinder 100 and a notch formed at the tail edge side end portion 114 of the printing plate 110. A plate pressing roller 120 having a large diameter portion 124 provided at a position aligned with 115 is provided. The automatic printing plate mounting apparatus disclosed in Patent Document 1 has a large diameter while pressing the printing plate 110 in a state in which the tail end 112 is engaged with the edge portion 102 a of the printing plate mounting groove 102 against the plate cylinder 100. The plate 124 is configured to be mounted on the plate cylinder 100 by pushing the tail edge side end portion 114 of the plate 110 into the plate mounting groove 102 of the plate cylinder 100 by the portion 124.

Japanese Patent No. 4737759

  However, in the automatic plate mounting apparatus of Patent Document 1, the pressing force of the printing plate 110 against the plate cylinder 100 is reduced by the presence of the large diameter portion 124 and the thin cylindrical portion 122 in the plate pressing roller 120. It becomes non-uniform in the axial direction of the trunk 100. In the automatic printing plate mounting apparatus of Patent Document 1, the pressing force of the printing plate 110 against the plate cylinder 100 is uneven as described above, so that the printing plate 110 is inclined with respect to the circumferential direction of the printing drum 100. There is a problem that there is a risk of winding in an inclined state.

  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 provide an automatic printing plate loading apparatus and an offset rotary printing press capable of improving the printing plate mounting accuracy with respect to a plate cylinder. It is to provide.

  An automatic plate mounting apparatus according to the present invention includes a printing plate mounting groove extending in the axial direction and a plate cylinder having a register pin provided in the printing plate mounting groove. A printing plate automatic loading device for loading a printing plate having a tail side end portion and a tail edge side end portion in which a notch portion is formed, and is configured to be able to advance and retreat with respect to the peripheral surface of the plate cylinder, and A plurality of pressing roller members configured to be rotatable along a circumferential direction of the plate cylinder around a rotation axis parallel to the axial direction of the plate cylinder, and provided at a position aligned with the register pin. A pressing protrusion configured to be able to press the tail end side end portion of the plate cylinder toward the plate mounting groove of the plate cylinder, and the plurality of pressing roller members have equal diameters, Each of the plates at an advanced position advanced toward the circumferential surface of the plate cylinder The printing plate can be pressed against the peripheral surface of the printing plate, and when the printing plate is mounted on the plate cylinder, the edge portion of the printing plate is engaged with the edge portion of the printing plate mounting groove. The plate end rotating in the forward direction in a stopped state is pressed against the plate by the plurality of pressing roller members, and the tail edge side end of the plate reaches the plate mounting groove The notch portion formed on the tail edge side end portion is fitted to the register pin by pushing the portion into the plate mounting groove by the pushing projection portion. .

  In the printing plate automatic mounting apparatus according to the present invention, the plurality of pressing roller members are disposed at positions other than the central pressing roller member disposed at a position corresponding to the pressing protrusion and the position corresponding to the pressing protrusion. A plurality of peripheral pressing roller members can be provided. The central pressing roller member and the plurality of peripheral pressing roller members may be arranged in alignment along the axial direction of the plate cylinder so that the rotation axes are coaxial with each other. The roller members are arranged in alignment along the axial direction of the plate cylinder so that the rotation axes are coaxial with each other, and the central pressing roller member is more than the plurality of peripheral pressing roller members, It may be arranged upstream in the forward direction.

  In the printing plate automatic loading apparatus according to the present invention, the plate cylinder has a printing plate clamping mechanism disposed in the printing plate loading groove, and the printing plate clamping mechanism is configured to receive the plate of the printing plate. A locking bar member configured to be able to lock the bottom end portion and an operation lever connected to the locking lever, and configured to rotate the locking lever by operating the operation lever. The printing plate automatic mounting apparatus further includes a printing plate attaching / detaching operation mechanism provided at a position corresponding to the operation lever of the printing plate clamping mechanism and configured to be movable forward and backward with respect to the operation lever, It is preferable that the printing plate attaching / detaching operation mechanism is configured to move forward with respect to the operation lever and rotate the locking bar member by operating the operation lever.

  An offset rotary printing press according to the present invention includes the above-described automatic plate mounting device, a printing plate mounting groove extending in the axial direction, and a plate cylinder having a register pin provided in the printing plate mounting groove. Features.

  ADVANTAGE OF THE INVENTION According to this invention, the printing plate automatic mounting apparatus and offset rotary printing machine which can improve the mounting precision of the printing plate with respect to a plate cylinder can be provided.

It is a figure which shows schematic structure of the printing unit which concerns on 1st Embodiment. It is a figure which shows schematic structure of the plate cylinder which concerns on 1st Embodiment. It is a front view which shows schematic structure of the printing plate automatic mounting apparatus which concerns on 1st 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 the state of the printing plate pressing mechanism, the plate cylinder, and the printing plate in the plate hanging process. 6A is a front view showing a schematic configuration of the automatic printing plate mounting apparatus in a state where the front cover is removed and the printing plate pressing mechanism is retracted, and FIG. 6B is a front view showing the front cover. FIG. 3 is a front view illustrating a schematic configuration of the automatic press plate mounting apparatus in a state where the press plate pressing mechanism is removed and advanced. It is a front view which shows schematic structure of the printing plate automatic mounting apparatus in the state which removed the front cover, the guard bracket, and the guard member, and the printing plate pressing mechanism retracted. It is a schematic enlarged view for demonstrating the function of the pressing projection part of a printing plate pressing mechanism. FIG. 9A is a side view showing a schematic configuration of the printing plate attachment / detachment operation mechanism when the printing plate is mounted on the plate cylinder, and FIG. 9A shows a schematic configuration of the printing plate attachment / detachment operation mechanism in the retracted state; b) shows a schematic configuration of the printing plate attaching / detaching operation mechanism in the advanced state. FIG. 10A is a side view showing a schematic configuration of the printing plate attaching / detaching operation mechanism when the printing plate is detached from the plate cylinder, and FIG. 10A 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. 11A is a process diagram showing the presser plate pressing mechanism in a state where the plate cylinder rotates in the forward direction toward the plate hanging position, and FIG. 11B shows the press plate attaching / detaching operation in the same state. It is process drawing which shows a mechanism. FIG. 11C is a process diagram showing the press plate holding mechanism in a state in which the end portion of the printing plate is locked to the edge portion of the press plate mounting groove, and FIG. It is process drawing which shows the printing plate attachment / detachment operation mechanism in FIG. 12 (a), 12 (c), 12 (e), and 12 (g) show the press plate in the press plate presser mechanism advance process, the plate hooking process, the plate mounting process, and the automatic plate mounting apparatus retracting process. FIG. 12B, FIG. 12D, FIG. 12F, and FIG. 12H are process diagrams showing the presser mechanism. It is process drawing which shows the printing plate attachment / detachment operation mechanism in a plate automatic mounting apparatus backward process. 13 (a), 13 (c) and 13 (e) show the state in which the plate cylinder is rotating in the forward direction toward the tail edge removal position, the plate presser mechanism advance step and the lock release step. FIG. 13 (b), FIG. 13 (d), and FIG. 13 (f) are diagrams showing the press plate holding mechanism, and FIG. 13 (b) shows a state in which the plate cylinder rotates in the forward direction toward the tail edge removal position; It is process drawing which shows the printing plate attachment / detachment operation mechanism in a printing plate presser mechanism advance process and a lock release process. 14 (a), 14 (c) and 14 (e) are process diagrams showing the plate presser mechanism in the plate attaching / detaching operation mechanism retreating step, reverse rotation step and plate presser mechanism retreating step, 14 (b), 14 (d) and 14 (f) are process diagrams showing the plate attachment / detachment operation mechanism in the plate attachment / detachment operation mechanism retracting step, the reverse rotation step, and the plate pressing mechanism retracting step. . It is a figure which shows the driving | running pattern of the plate cylinder which concerns on this embodiment. It is the schematic which abbreviate | omits and shows the state which looked at the printing plate automatic mounting apparatus which concerns on 2nd Embodiment from the bottom face direction (plate cylinder side). It is the schematic which shows the state which looked at the printing plate press mechanism which concerns on 2nd Embodiment from the side surface direction. It is a figure which shows schematic structure of the conventional plate cylinder and a printing plate. It is a figure which shows schematic structure of the conventional plate press roller.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments for carrying out the present 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. .

[First Embodiment]
First, the configuration of the offset rotary printing press according to the first embodiment of the present invention will be described with reference to FIGS. The offset rotary printing press according to the first embodiment has a continuous paper supply unit (not shown) for setting roll paper obtained by winding continuous paper (printed body) in a roll shape, and a continuous paper supplied from the continuous paper supply unit. A plurality of printing units 2a and 2b for performing offset printing on both sides of the paper, and continuous sheets after offset printing are cut to form individual sheet-like sheets, and from one sheet-like sheet or a plurality of sheet-like sheets A folding machine (not shown) that folds the 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. And one or a plurality of control units (not shown) that execute various controls of each component. In the offset rotary printing press according to the first embodiment, various types of known continuous paper supply units, folding machines, post-processing mechanisms, and control units can be arbitrarily used, and descriptions thereof are omitted.

  As shown in FIG. 1, each of the upper printing unit 2a and the lower printing unit 2b includes a pair of ink supply devices 4 having a large number of ink supply rollers and a pair of plate cylinders on which a printing plate (not shown) is mounted. 6, a pair of blanket cylinders 8 on which a printing blanket (not shown) is mounted, and an automatic plate mounting apparatus 10 disposed in proximity to the operation-side plate cylinder 6. In the printing units 2a and 2b, the ink supplied from the ink supply device 4 is supplied to the printing blanket of the blanket cylinder 8 through the printing plate of the plate cylinder 6 in the same manner as in the conventional printing unit. By contacting the running continuous paper (printed body) 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 the first embodiment, various well-known ink supply devices 4 and blanket cylinders 8 can be arbitrarily used, and thus description thereof is omitted.

  The plate cylinder 6 is a printing cylinder formed in a columnar shape, and as shown in FIG. 2, mounting shafts 6a provided at both ends and plate plates 7 for four pages can be mounted side by side in the axial direction. A peripheral surface having a printing plate mounting region R, a printing plate mounting groove 6b extending in the axial direction, an accommodating portion (not shown) that is an internal space continuous to the printing plate mounting groove 6b, and the printing plate mounting groove 6b. A plurality of (four in the present embodiment) register pins 6c provided on the printing plate mounting area R and an operation opening 6d formed on the end side of the plate mounting region R. In the present embodiment, the plate cylinder 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 an equal circumferential length (L).

  The plate cylinder 6 has attachment shafts 6a at both ends attached to a pair of frames F and F via bearings (not shown), and is predetermined by rotation driving means (not shown) connected to one attachment shaft 6a. It is comprised so that it may be rotationally driven with the speed of. One register pin 6c is provided for one printing plate 7, and in this embodiment, four printing plates 7 for one page are arranged side by side in the axial direction. Four are provided at predetermined intervals in the axial direction. A plate tightening mechanism 50 configured to wind the plate 7 around the peripheral surface of the plate cylinder 6 by drawing the tail edge side end portion 7b of the plate 7 into the plate mounting groove 6b is provided in the accommodating portion. Buried. The operation opening 6d is an opening for operating the first to fourth operation mechanisms 52a to 52d of the printing plate clamping mechanism 50. In the offset rotary printing press according to the first embodiment, various well-known printing cylinders 6 can be arbitrarily used, and thus detailed description thereof is omitted.

  The printing plate 7 is formed of a flexible metal thin plate material having a size corresponding to one page of a newspaper. Like the conventional printing plate 110, one side of the printing plate mounting groove 6b of the plate cylinder 6 is used. And a tail end 7a configured to be pulled into the plate mounting groove 6b by the plate tightening mechanism 50 (see FIG. (See 5). A notch portion 7c (see FIG. 8) that can be fitted to the register pin 6c of the plate cylinder 6 is formed at the tail end portion 7a and the tail edge side end portion 7b of the printing plate 7, respectively. The plate 7 is positioned by fitting the notches 7c to the register pins 6c. In the offset rotary printing press according to the first embodiment, various well-known printing plates 7 can be arbitrarily used, and thus the description thereof is omitted.

  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. As the plate clamping mechanism 50, various known ones can be used arbitrarily, and thus detailed description thereof is omitted, but generally includes the following configuration.

  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 end portion 7b of the printing plate 7 can be locked. Has been. 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 plate is rotated (angularly displaced) in the direction of pulling or loosening the printing plate 7.

  Each of the first to fourth operation mechanisms 52a to 52d includes an operation lever 54 for operating a corresponding angular displacement axis. The operating lever 54 swings to disengage the mounting position for fastening the printing plate 7 onto the outer peripheral surface of the plate cylinder 6 and the engagement bar member and the tail edge side end portion 7b of the printing plate 7. The corresponding angular displacement axis is angularly displaced between the released positions. Specifically, each operation lever 54 is rotated downward in the tightening direction by rotating the corresponding angular displacement shaft in the tightening direction when the tip end side of each operation lever 54 is pushed downward (inward in the radial direction of the plate cylinder 6). The tail edge side end portion 7b is pulled into the inside of the plate cylinder 6 by a locking bar member (see FIG. 12 (f)). Each operation lever 54 is configured to be locked when the corresponding angular displacement shaft reaches the mounting position. Further, each operation lever 54 is unlocked when the base end side is pushed downward (inward in the radial direction of the plate cylinder 6) in the locked state, and thereby the corresponding angular displacement shaft is opposite to the tightening direction. The engagement bar member and the tail edge side end portion 7b of the printing plate 7 are disengaged (see FIG. 13 (f)).

  The automatic plate mounting apparatus 10 is configured to be able to automatically mount the printing plate 7 on the plate cylinder 6 and to be able to automatically remove the printing plate 7 from the plate cylinder 6. Specifically, as shown in FIGS. 3 and 6, for example, the automatic plate mounting apparatus 10 includes 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. A printing plate presser mechanism 20 (see FIGS. 4 to 8) and a printing plate attaching / detaching operation mechanism 30 (see FIGS. 3, 9, and 10) attached to the fixed base member 12 in a state of being able to advance and retreat relative to the cylinder 6. The front cover 16 is attached so as to cover the front surface of the fixed base member 12, and a control unit (not shown) for controlling the operations of the printing plate pressing mechanism 20 and the printing plate attaching / detaching operation mechanism 30 is provided.

  The front cover 16 is a thin plate member that extends downward from the front edge of the upper surface of the fixed base member 12, and covers the front surface of the plate pressing mechanism 20 attached to the fixed base member 12. It is configured to hide. 3 is a front view of the automatic printing plate mounting apparatus 10, and FIGS. 4 and 5 are side views showing the printing plate pressing mechanism 20. FIG. 6 is a front view of the automatic printing plate mounting apparatus 10 with the front cover 16 removed, and FIG. 7 shows the printing with the front cover 16 and a guard bracket 26 and a guard member 27 described later removed. 1 is a front view of an automatic plate mounting apparatus 10. FIG. FIG. 8 is a schematic enlarged view for explaining the function of the pushing projection 27 a of the printing plate presser mechanism 20, and FIGS. 9 and 10 are side views showing the printing plate attaching / detaching operation mechanism 30.

  The fixed base member 12 is a long member having a length substantially equal to the length of the plate cylinder 6 in the axial direction as shown in FIG. 3, and the upper surface portion and the rear surface portion are arranged as shown in FIGS. 4 and 5. The cross section has an inverted L-shape. One end of the fixed base member 12 is fixed to one frame F via the bracket 14, and the other end is fixed to the other frame F via the bracket 14. For example, as shown in FIG. 6, a plurality of (four in the present embodiment) linear motion guides 13 are attached to the inner surface (front surface) of the back surface of the fixed base member 12 at a predetermined interval in the longitudinal direction. Yes. Each linear motion guide 13 includes a linear bush 13a fixed to the inner surface (front surface) of the back surface of the fixed base member 12, and a shaft 13b fixed to a movable base member 24, which will be described later, of the printing plate pressing mechanism 20. The movable base member 24 is configured to guide forward and backward movement of the fixed base member 12.

  For example, as shown in FIG. 6, the plate pressing mechanism 20 is provided over a region corresponding to the plate mounting region R of the plate cylinder 6. For example, as shown in FIG. 4, the printing plate pressing mechanism 20 includes an air cylinder 22 attached to the inner surface (lower surface) of the upper surface portion of the fixed base member 12 and a movable member attached to the tip of the cylinder rod 23 of the air cylinder 22. A base member 24; a guard bracket 26 fixed to the movable base member 24; a guard member 27 attached to the guard bracket 26; and a plurality of pressing roller members 28a and 28b attached to the movable base member 24. Yes.

  For example, as shown in FIG. 6, a plurality of (three in the present embodiment) air cylinders 22 are provided at predetermined intervals in the longitudinal direction of the fixed base member 12. The member 24 is configured to move forward and backward with respect to the plate cylinder 6. 6A shows a state in which the cylinder rod 23 is retracted, that is, a state in which the movable base member 24 is separated from the plate cylinder 6. FIG. 6B shows a state in which the cylinder rod 23 has advanced. That is, the movable base member 24 approaches the plate cylinder 6. As shown in FIGS. 3 and 4A, for example, the printing plate presser mechanism 20 according to the present embodiment includes an air pipe (not shown) and the front cover 16 in a state where the cylinder rod 23 is retracted. It is configured to hide inside. In the present embodiment, various well-known air cylinders 22 can be arbitrarily used, and the description thereof is omitted. In addition, the air cylinder may not be used as long as the movable base member 24 can be moved forward and backward with respect to the plate cylinder 6.

  As shown in FIG. 6, for example, the movable base member 24 is formed of a long thin plate member having a length substantially equal to the axial length of the printing plate mounting region R of the plate cylinder 6, for example, as shown in FIG. The upper surface is connected to the tip of the cylinder rod 23 of each air cylinder 22. A guard bracket 26 is attached to the lower surface of the movable base member 24 so as to protrude downward at the front end edge portion thereof, and a plurality of pressing roller members 28a and 28b are provided in a region on the rear side of the guard bracket 26. Is attached.

  For example, as shown in FIG. 6, the guard bracket 26 is formed of a long thin plate member having a length substantially equal to the length of the movable base member 24 in the longitudinal direction. For example, as shown in FIG. It is attached to the lower surface of the movable base member 24 on the front side of 28a and 28b. The guard bracket 26 is configured to function as a finger guard that prevents a finger or the like from being accidentally caught between the plate cylinder 6 and the pressing roller members 28a and 28b when the printing plate 7 is attached to and detached from the plate cylinder 6. Has been.

  For example, as shown in FIG. 6, the guard member 27 is a long thin plate member having a length substantially equal to the length of the printing plate 7 in the lateral direction (the axial direction of the plate cylinder 6), and the lower end edge of the guard bracket 26. It is attached to the part. One guard member 27 is provided for one printing plate 7. In the present embodiment, four printing plates 7 for one page are mounted side by side in the axial direction, so that four plates 7 are provided side by side along the lower edge of the guard bracket 26 with almost no gap. The guard member 27 is made of a material more flexible than the guard bracket 26, for example, a resin material such as polyamide, and the plate 7 directly contacts the guard bracket 26 when the plate 7 is attached to or detached from the plate cylinder 6. It is configured to function as a guard to prevent damage.

  For example, as shown in FIG. 6, each guard member 27 protrudes toward the plate cylinder 6 at a position where it is aligned with the register pin 6 c of the plate cylinder 6, in this embodiment, at the center in the longitudinal direction of each guard member 27. It has a pushing projection 27a.

  As shown in FIG. 5A, the pushing protrusion 27a and the pushing protrusion 27a and the printing plate 27 are moved in a state in which the cylinder rod 23 of the air cylinder 22 moves forward and the movable base member 24 approaches the peripheral surface of the plate cylinder 6. The distance D from the peripheral surface of the cylinder 6 is formed to be slightly smaller than the bending height d of the tail edge side end portion 7 b of the printing plate 7. By forming in this way, as shown in FIG. 5C, the pushing protrusion 27a is in the vicinity of the tail edge side end portion 7b of the plate 7 that has reached the plate mounting groove 6b of the plate cylinder 6. Is pressed toward the plate mounting groove 6b and the tail edge side end portion 7b is pushed into the plate mounting groove 6b to form the tail edge side end portion 7b on the register pin 6c of the plate cylinder 6. The notch 7c can be fitted.

  Further, the pushing projection 27a is substantially the same as or larger than the width (the length along the axial direction of the plate cylinder 6) of the notch 7c formed at the tail edge side end 7b of the printing plate 7. It has a width (length along the axial direction of the plate cylinder 6). By forming in this way, as shown in FIG. 8, the pushing protrusion 27a has an open end without causing plate cracking due to stress concentration of the notch 7c formed in the tail edge 7b. Since it is possible to press the tail edge side end portion 7b so as to spread, the notch portion 7c of the tail edge side end portion 7b of the plate cylinder 6 is smoothly and reliably fitted to the register pin 6c. Is possible.

  For example, as shown in FIG. 4, the plurality of pressing roller members 28 a and 28 b are roller members configured to be rotatable along the circumferential direction of the plate cylinder 6 around a rotation axis parallel to the axial direction of the plate cylinder 6. And have the same diameter. As shown in FIGS. 4B and 5A to 5C, the plurality of pressing roller members 28a and 28b are moved forward by the cylinder rod 23 of the air cylinder 22, and the movable base member 24 is moved to the plate cylinder. The plate 7 can be pressed against the peripheral surface of the plate cylinder 6 in a state of approaching the peripheral surface 6 (advance position). 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.

  For example, as shown in FIGS. 6 and 7, three pressing roller members 28a and 28b are provided for one printing plate 7, and in this embodiment, the printing plate 7 for one page is axially arranged. Therefore, a total of twelve of them are arranged side by side at a predetermined interval along the longitudinal direction of the movable base member 24. The three pressing roller members 28a and 28b corresponding to one printing plate 7 correspond to the positions corresponding to the pushing protrusions 27a of the guard members 27 (that is, the short side direction of each printing plate 7 (the axial direction of the plate cylinder 6). ) At a position aligned with the substantially central portion) and one peripheral pressing roller member 28b disposed at a position other than the position corresponding to the pushing protrusion 27a. In the present embodiment, the two peripheral presser roller members 28b are peripheral presser roller members 28b disposed at positions corresponding to the vicinity of one end in the lateral direction of each printing plate 7 (the axial direction of the plate cylinder 6). , Each press plate 7 includes a peripheral pressing roller member 28b disposed at a position corresponding to the vicinity of the other end portion in the horizontal direction. The central pressing roller member 28a and the peripheral pressing roller member 28b are arranged in alignment along the axial direction of the plate cylinder 6 so that the rotation axes are coaxial with each other.

  The printing plate presser mechanism 20 according to the present embodiment has the above-described configuration. For example, as shown in FIGS. 4 and 5, when the printing plate 7 is mounted on the plate cylinder 6, the edge of the printing plate mounting groove 6 b is used. The plate 7 is configured to be pressed by a plurality of pressing roller members 28a and 28b against the plate cylinder 6 that rotates in the forward direction with the gripper side end portion 7a of the plate 7 being locked to the portion. . Further, as shown in FIG. 5C, for example, the press plate holding mechanism 20 according to the present embodiment pushes the tail edge side end portion 7b of the press plate 7 that has reached the press plate mounting groove 6b with a pressing projection 27a. By pushing into the plate mounting groove 6b, the register pin 6c is configured to fit the notch 7c formed at the tail end 7b. Further, in the plate holding mechanism 20 according to the present embodiment, even when the printing plate 7 is detached from the plate cylinder 6, the holding side end portion 7a of the printing plate 7 is locked to the edge portion of the printing plate mounting groove 6b. In this state, the printing plate 7 can be pressed against the plate cylinder 6 rotating in the reverse direction by a plurality of pressing roller members 28a and 28b.

  For example, as shown in FIG. 3, the printing plate attachment / detachment operation mechanism 30 is provided one by one at a position aligned with the first to fourth operation mechanisms 52 a to 52 d. In the present embodiment, the two printing plate attachment / detachment operation mechanisms 30 arranged at positions aligned with the first and second operation mechanisms 52a, 52b are arranged via one bracket 32 as shown in FIGS. 3 and 9, for example. The two printing plate attachment / detachment operation mechanisms 30 that are attached to the vicinity of one end of the fixed base member 12 in the longitudinal direction and that are aligned with the third and fourth operation mechanisms 52c, 52d are 1 The fixed base member 12 is attached to the other end in the longitudinal direction of the fixed base member 12 via one bracket 32.

  For example, as shown in FIG. 9, each printing plate attaching / detaching operation mechanism 30 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. .

  For example, as shown in FIG. 9, the air cylinder 34 is configured to move the lever pressing member 38 forward and backward with respect to the plate cylinder 6 by the forward and backward movement of the cylinder rod 36. 9A shows a state in which the cylinder rod 36 is retracted, that is, a state in which the lever pressing member 38 is separated from the plate cylinder 6. FIG. 9B shows a state in which the cylinder rod 36 has advanced. That is, a state where the lever pressing member 38 approaches the plate cylinder 6 is shown. In the present embodiment, various known air cylinders 34 can be arbitrarily used, and the description thereof is omitted. Further, the air cylinder need not be an air cylinder as long as the lever pressing member 38 can move forward and backward with respect to the plate cylinder 6.

  For example, as shown in FIG. 9, the upper surface of the lever pressing member 38 is connected to the tip of the cylinder rod 36 of the air cylinder 34. On the lower surface of the lever pressing member 38, a protruding portion protruding downward (in the direction toward the plate cylinder 6) is formed.

  Since the printing plate attaching / detaching operation mechanism 30 according to the present embodiment has the above-described configuration, for example, as shown in FIG. 9, the edge portion 7a of the printing plate 7 is engaged with the edge portion of the printing plate mounting groove 6b. The lever pressing member 38 moves forward with respect to the plate cylinder 6 in a state where the tail end 7b is pushed into the plate mounting groove 6b, and the corresponding operation mechanism (first to fourth operation mechanisms 52a). ˜52d) by pushing down the tip end side of the operation lever 54 downward (inward in the radial direction of the plate cylinder 6), the corresponding angular displacement shaft is rotated in the tightening direction, and the printing plate 7 is placed on the peripheral surface of the plate cylinder 6. It is configured to be worn. Further, the printing plate attaching / detaching operation mechanism 30 according to the present embodiment has, as shown in FIG. 10, for example, a lever pressing member 38 that moves forward with respect to the plate cylinder 6 with the printing plate 7 mounted thereon, and a corresponding operation mechanism. By depressing the base end side of the operation lever 54 of the (first to fourth operation mechanisms 52a to 52d) downward (inward in the radial direction of the plate cylinder 6), the lock of the operation lever 54 is released, and the lock is released. The angular 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 plate 7 is released. Has been.

  The control unit includes a control unit that controls the plate cylinder 6 and a control unit that controls the automatic printing plate loading apparatus 10. The control unit is configured to be able to detect the rotation operation of the plate cylinder 6 by having the above-described configuration, and the printing plate presser mechanism 20 and the plate attachment / detachment operation mechanism 30 are arranged in accordance with the rotation operation of the plate cylinder 6. It is configured to operate at an appropriate timing.

  That is, the control unit for controlling the plate cylinder 6 is a rotational position detector (for example, a servo motor or the like) provided on the mounting shaft 6a of the plate cylinder 6 or connected to the mounting shaft 6a. The plate cylinder 6 is accurately stopped at a predetermined stop position in each plate attaching / detaching process based on information (rotation speed, rotation position, etc.) of the rotation operation of the plate cylinder 6 detected by an encoder or the like. Information on the rotation operation of the plate cylinder 6 is transmitted from the control unit to a control unit that controls the automatic plate mounting apparatus 10, and the plate pressing mechanism 20 and the plate attachment / detachment operation mechanism are synchronized with the rotation operation of the plate cylinder 6. 30 is operated at an appropriate timing.

  Between the pair of frames F, F of the lower printing unit 2b, a plate hanging position button (not shown), a plate hanging preparation button (not shown), a plate hanging button (not shown), and a plate removal An operation unit 3 (see FIG. 1) provided with buttons (not shown) is provided. The control unit is configured to automatically operate the plate cylinder 6 and the plate automatic loading device 10 when these buttons are pressed by an operator. The operation unit 3 selects a plate attachment / detachment operation mechanism 30 to be operated from the plate attachment / detachment operation mechanism 30 of the automatic plate attachment device 10 provided in each of the upper printing unit 2a and the lower printing unit 2b. A surface selection button (not shown) is further arranged.

  Specifically, in the rotary offset printing press according to the present embodiment, the plate mounting groove 6b is exposed to the operator side by the control unit that controls the plate cylinder 6 when the plate position button is pressed, The plate cylinder 6 is configured to rotate in the forward direction until reaching a position (plate hanging position) at which the edge 7a of the printing plate 7 can be locked to the edge portion of the printing plate mounting groove 6b. (See FIG. 11).

  In the offset rotary printing press according to the present embodiment, when the operator locks the grip-side end portion 7a of the printing plate 7 to the edge portion of the printing plate mounting groove 6b, the plate hanging preparation button is pressed. Then, the press plate holding mechanism 20 is moved forward with respect to the plate cylinder 6 by the control unit that controls the automatic plate mounting apparatus 10, and the plate 7 is pressed against the peripheral surface of the plate cylinder 6 by the plurality of pressing roller members 28a and 28b. It is comprised so that it may attach (refer Fig.12 (a)).

  In the offset rotary printing press according to the present embodiment, the printing plate of the plate cylinder 6 is controlled by a control unit that controls the plate cylinder 6 in a state where the printing plate 7 is pressed against the peripheral surface of the plate cylinder 6 by the plate pressing mechanism 20. The plate cylinder 6 is configured to rotate in the forward direction until the tip of the operation lever 54 of the clamping mechanism 50 reaches a position (clamping position) that aligns with the protruding portion of the lever pressing member 38 of the printing plate attachment / detachment operation mechanism 30. (See FIG. 12D). Further, in the offset rotary printing press according to the present embodiment, the plate attaching / detaching operation mechanism 30 is attached to the plate cylinder 6 by the control unit that controls the plate automatic mounting apparatus 10 in a state where the plate cylinder 6 is stopped at the tightening position. The printing plate 7 is mounted on the plate cylinder 6 by moving forward and pushing down the tip of the operation lever 54 of the plate clamping mechanism 50 of the plate cylinder 6 by the protruding portion of the lever pressing member 38. (See FIG. 12 (f)). Furthermore, the rotary offset printing press according to the present embodiment is configured to retract the plate presser mechanism 20 and the plate attachment / detachment operation mechanism 30 from the plate cylinder 6 after the installation of the plate 7 to the plate cylinder 6 is completed. (See FIG. 12 (g) and FIG. 12 (h))

  The rotary offset printing press according to the present embodiment has a printing cylinder 6 and a printing plate that are controlled by a control unit that controls the printing cylinder 6 and a control unit that controls the automatic printing plate loading apparatus 10 when the plate removal button is pressed. The automatic mounting apparatus 10 is configured to execute the following operation.

  That is, in the offset rotary printing press according to the present embodiment, first, the control portion that controls the plate cylinder 6 causes the base end portion of the operation lever 54 of the plate clamping mechanism 50 of the plate cylinder 6 to be connected to the plate attachment / detachment operation mechanism 30. The plate cylinder 6 is configured to rotate in the forward direction until it reaches a position aligned with the protruding portion of the lever pressing member 38 (a tail edge removal position) (see FIG. 13B).

  Further, in the offset rotary printing press according to the present embodiment, the plate presser mechanism 20 is moved to the plate cylinder by the control unit that controls the plate automatic loading device 10 in a state where the plate cylinder 6 is stopped at the tail edge removal position. 6, the printing plate 7 is pressed against the peripheral surface of the plate cylinder 6 by a plurality of pressing roller members 28a and 28b (see FIG. 13C).

  Further, in the offset rotary printing press according to the present embodiment, the printing plate attaching / detaching operation mechanism 30 is advanced with respect to the plate cylinder 6 by the control unit that controls the plate automatic loading apparatus 10, and the protruding portion of the lever pressing member 38 is used. By pushing down the base end portion of the operation lever 54 of the plate clamping mechanism 50 of the plate cylinder 6 and releasing the lock of the operation lever 54, the locking bar member of the plate clamping mechanism 50 and the tail edge side of the plate 7 It is comprised so that engagement with the edge part 7b may be cancelled | released (refer FIG.13 (f)).

  Furthermore, the offset rotary printing press according to the present embodiment is configured such that after the engagement between the locking bar member and the tail edge side end portion 7b is released, the control unit that controls the plate automatic loading device 10 performs printing. The plate attaching / detaching operation mechanism 30 is configured to be retracted from the plate cylinder 6 (see FIG. 14B). Further, in the offset rotary printing press according to the present embodiment, after the printing plate attaching / detaching operation mechanism 30 is retracted, the control unit that controls the plate cylinder 6 allows the operator to remove the printing plate 7 from the edge portion of the printing plate mounting groove 6b. The plate cylinder 6 is configured to rotate in the reverse direction until it reaches a position where the tail end 7a can be removed (a tail removal position) (FIGS. 14C and 14D). reference). Furthermore, in the offset rotary printing press according to the present embodiment, the plate presser mechanism 20 is moved to the plate cylinder 6 by the control unit that controls the automatic plate mounting apparatus 10 in a state where the plate cylinder 6 is stopped at the holding and removing position. (See FIG. 14E).

  Next, a method for automatically mounting the printing plate 7 to the plate cylinder 6 using the automatic printing plate mounting apparatus 10 according to the present embodiment will be described with reference to FIGS. 11 and 12. A method of automatically removing the will be described with reference to FIGS. 13 and 14.

  First, prior to the operation of the automatic printing plate mounting apparatus 10, an operator performs an operation of locking the grip-side end portion 7a of the printing plate 7 to the edge portion of the printing plate mounting groove 6b (plate-hanging preparation step). . Specifically, when the operator presses the plate hanging position button of the operation unit 3, the plate cylinder 6 is moved to the plate hanging position (plate mounting) as shown in FIGS. 11 (a) to 11 (d). Rotate in the forward direction until the edge 7a of the plate 7 can be locked to the edge of the groove 6b. Then, in a state where the plate cylinder 6 is stopped at the plate hanging position, the gripper side end portion 7a of the plate 7 is locked to the edge portion of the plate mounting groove 6b by the operator. FIG. 11A shows the plate presser mechanism 20 in a state where the plate cylinder 6 is rotating in the forward direction toward the plate hanging position, and FIG. 11B shows a plate attaching / detaching operation in the same state. The mechanism 30 is shown. FIG. 11 (c) shows the press plate holding mechanism 20 in a state in which the holding end portion 7a of the printing plate 7 is locked to the edge portion of the printing plate mounting groove 6b, and FIG. The printing plate attaching / detaching operation mechanism 30 in the same state is shown.

  Next, when the operator presses the plate preparation button, as shown in FIG. 12A, the plate presser mechanism 20 of the automatic press plate mounting apparatus 10 moves forward with respect to the plate cylinder 6, and a plurality of press plates are prepared. The press plate 7 is pressed against the peripheral surface of the plate cylinder 6 by the pressing roller members 28a, 28b (press plate pressing mechanism advancement step). 12A shows the plate presser mechanism 20 in the plate presser mechanism advancement step, and FIG. 12B shows the plate attachment / detachment operation mechanism 30 in the step.

  Next, as shown in FIGS. 12C and 12D, when the operator presses the plate hanging button, the plate cylinder 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). Then, when the plate presser mechanism 20 moves forward with respect to the plate cylinder 6 in this manner, the plate cylinder 6 rotates substantially once, and as shown in FIG. 5A to FIG. In a state where the printing plate 7 is uniformly pressed against the plate cylinder 6 by the pressing roller members 28a and 28b, the printing plate 7 is wound around the peripheral surface of the plate cylinder 6, and the plate 7 is bent by the pressing protrusion 27a. The tail edge side end portion 7b is pushed into the plate mounting groove 6b, and the notch portion 7c of the tail edge side edge portion 7b is fitted to the register pin 6c. FIG. 12C shows the press plate holding mechanism 20 in the plate-engaging process, and FIG. 12D shows the press plate attaching / detaching operation mechanism 30 in the same process.

  After the plate cylinder 6 stops at the tightening position, as shown in FIG. 12 (f), the plate attachment / detachment operation mechanism 30 moves forward with respect to the plate cylinder 6, and the protrusion of the lever pressing member 38 causes the plate cylinder 6 to move. The tip of the operation lever 54 of the printing plate clamping mechanism 50 is pushed down (plate mounting process). As a result, the corresponding angular displacement shaft rotates in the tightening direction, and the tail edge side end portion 7b of the printing plate 7 is drawn into the plate cylinder 6, so that the printing plate 7 is mounted on the peripheral surface of the plate cylinder 6. Is done. FIG. 12E shows the plate presser mechanism 20 in the plate mounting step, and FIG. 12F shows the plate attachment / detachment operation mechanism 30 in the step.

  After the mounting of the printing plate 7 on the plate cylinder 6 is completed, as shown in FIGS. 12 (g) and 12 (h), the printing plate pressing mechanism 20 and the printing plate attaching / detaching operation mechanism 30 are retracted from the plate cylinder 6 ( Reversing process of automatic plate mounting device). As a result, a series of operations of the plate automatic loading apparatus 10 relating to the loading of the plate 7 is completed. FIG. 12G shows the plate presser mechanism 20 in the plate automatic loading apparatus retracting step, and FIG. 12H shows the plate attaching / detaching operation mechanism 30 in the same step.

  After the predetermined printing is completed, a process of automatically removing the printing plate 7 from the plate cylinder 6 is executed when the operator presses the plate removal button. Specifically, first, as shown in FIGS. 13 (a) and 13 (b), the plate cylinder 6 is positioned at the tail edge removal position (the base end portion of the operating lever 54 is aligned with the protruding portion of the lever pressing member 38). Rotate in the forward direction until it reaches FIG. 13A shows the plate presser mechanism 20 in a state where the plate cylinder 6 rotates in the forward direction toward the tail edge removal position, and FIG. 13B shows the plate presser in the same state. The attachment / detachment operation mechanism 30 is shown.

  After the plate cylinder 6 stops at the tail edge removal position, as shown in FIG. 13C, the plate press mechanism 20 of the automatic plate mounting apparatus 10 moves forward with respect to the plate cylinder 6 and a plurality of pressers. The printing plate 7 is pressed against the peripheral surface of the plate cylinder 6 by the roller members 28a and 28b (pressing plate pressing mechanism advancement step). FIG. 13 (c) shows the plate presser mechanism 20 in the plate presser mechanism advance step, and FIG. 13 (d) shows the plate attachment / detachment operation mechanism 30 in the step.

  After the plate pressing mechanism 20 has advanced, as shown in FIG. 13 (f), the plate attaching / detaching operation mechanism 30 advances with respect to the plate cylinder 6, and the printing plate of the plate cylinder 6 is projected by the protruding portion of the lever pressing member 38. The proximal end portion of the operation lever 54 of the tightening mechanism 50 is pushed down (lock release process). Thereby, the lock of the operation lever 54 is released, and the corresponding angular displacement shaft rotates in the direction opposite to the tightening direction, whereby the engagement between the locking bar member and the tail edge side end portion 7b of the printing plate 7 is established. The match is released. FIG. 13 (e) shows the plate presser mechanism 20 in the unlocking step, and FIG. 13 (f) shows the plate attaching / detaching operation mechanism 30 in the same step.

  After the engagement between the locking bar member and the tail edge 7b is released, the plate attaching / detaching operation mechanism 30 is retracted from the plate cylinder 6 as shown in FIG. 14B (plate attaching / detaching operation). Mechanism retraction process). Further, after the printing plate attaching / detaching operation mechanism 30 is retracted, as shown in FIGS. 14 (c) and 14 (d), the plate cylinder 6 is held and removed (from the edge portion of the printing plate mounting groove 6b to the printing plate 7). Rotate in the reverse direction until it reaches the position at which the tail end 7a can be removed (reverse direction rotation step). Then, in a state where the plate cylinder 6 is stopped at the gripping / removing position, the plate presser mechanism 20 moves backward from the plate cylinder 6 (plate presser mechanism retracting step). As a result, the operator can remove the grip-side end portion 7a of the printing plate 7 from the edge portion of the printing plate loading groove 6b, and the series of operations of the automatic printing plate loading device 10 relating to the removal of the printing plate 7 is completed. To do. 14A shows the plate presser mechanism 20 in the plate attaching / detaching operation mechanism retreating step, and FIG. 14B shows the plate attaching / detaching operation mechanism 30 in the same step. FIG. 14C shows the plate presser mechanism 20 in the reverse rotation process, and FIG. 14D shows the plate attachment / detachment operation mechanism 30 in the same process. Further, FIG. 14E shows the plate presser mechanism 20 in the plate presser mechanism retracting step, and FIG. 14F shows the plate attaching / detaching operation mechanism 30 in the same step.

  As described above, the automatic printing plate mounting apparatus 10 according to the present embodiment is based on the printing plate mounting groove 6b extending in the axial direction and the plate cylinder 6 having the register pin 6c provided in the printing plate mounting groove 6b. A printing plate automatic loading device 10 for loading a printing plate 7 having a tail end 7a and a tail end 7b formed with a notch 7c that can be fitted to a register pin 6c, A plurality of pressing roller members configured to be movable forward and backward with respect to the circumferential surface of the cylinder 6 and configured to be rotatable along the circumferential direction of the plate cylinder 6 around a rotation axis parallel to the axial direction of the plate cylinder 6 28a, 28b, and a push-in projection that is provided at a position that aligns with the register pin 6c and is configured to be able to press the vicinity of the tail edge side end 7b of the printing plate 7 toward the printing plate mounting groove 6b of the plate cylinder 6. 27a, and a plurality of pressing roller members 28a, 28b The plates 7 have the same diameter, and are configured to be able to press the printing plate 7 against the circumferential surface of the plate cylinder 6 at the advanced positions advanced toward the circumferential surface of the plate cylinder 6. When the plate cylinder 6 is mounted, a plurality of pressing roller members 28a, against the plate cylinder 6 rotating in the forward direction in a state where the edge portion 7a of the plate 7 is locked to the edge portion of the plate mounting groove 6b. The press plate 7 is pressed by 28b, and the tail edge side end portion 7b of the press plate 7 that has reached the press plate mounting groove 6b is pressed into the press plate mounting groove 6b by the pressing protrusion 27a. The cutout portion 7c formed in the bottom end portion 7b is configured to be fitted.

  According to such an automatic plate mounting apparatus 10, since the plurality of pressing roller members 28 a and 28 b have the same diameter, the printing plate 7 is placed on the peripheral surface of the plate cylinder 6 with a uniform pressing force. Since it can be pressed, the printing plate 7 can be wound straight in the circumferential direction of the plate cylinder 6. Further, according to the printing plate automatic mounting apparatus 10 according to the present embodiment, the pressing projection 27 a that can press the tail edge side end portion 7 b of the printing plate 7 into the printing plate mounting groove 6 b is provided. The tail edge side end portion 7b of the printing plate 7 wound around the plate cylinder 6 is automatically inserted into the plate mounting groove 6b, and the notch portion 7c of the tail edge side edge portion 7b is fitted into the register pin 6c. Can be combined. In particular, in the printing plate automatic mounting apparatus 10 according to the present embodiment, the push-in projection 27 a is aligned with the register pin 6 c of the plate cylinder 6 and the notch 7 c of the tail edge side end 7 b of the printing plate 7. Since it is possible to press the tail edge side end portion 7b so that the opening end of the notch portion 7c is widened, the notch portion of the tail edge side end portion 7b with respect to the register pin 6c of the plate cylinder 6 is provided. 7c can be smoothly and reliably engaged.

  Further, the printing plate automatic mounting apparatus 10 according to the present embodiment is provided at a position corresponding to the operation lever 54 of the printing plate clamping mechanism 50, and is configured to be able to advance and retreat with respect to the operation lever 54. The plate attaching / detaching operation mechanism 30 is configured to move forward with respect to the operation lever 54 and rotate the locking bar member by operating the operation lever 54. According to such an automatic plate mounting apparatus 10, in addition to winding the plate 7 around the plate cylinder 6 and inserting the tail edge 7b into the plate mounting groove 6b, the printing plate clamping mechanism 50 performs printing. The pulling of the plate 7 and the removal of the printing plate 7 from the plate cylinder 6 can be automatically performed. That is, according to the automatic printing plate mounting apparatus 10 according to the present embodiment, all operations other than the attachment / detachment of the grip-side end portion 7a of the printing plate 7 with respect to the edge portion of the printing plate mounting groove 6b can be automatically performed. It becomes.

  Here, a method in which the control unit that controls the plate cylinder 6 according to the present embodiment accurately stops the plate cylinder 6 at a predetermined stop position in each step described above will be described with reference to FIG.

  When the printing plate is automatically mounted and removed using the automatic printing plate mounting apparatus 10, the operation unit 3 is first operated by the operator, and the control unit that controls the plate cylinder 6 is stopped. The plate cylinder 6 is rotated at a slow moving speed (crawling speed) v1. Next, when the rotational position detector detects that the plate cylinder 6 has approached a certain position before the predetermined stop position, the plate cylinder 6 is once decelerated to the stop-front speed v2 and the speed is maintained for a while. After that, the plate cylinder 6 is stopped.

  In this way, the plate cylinder 6 is not decelerated from the slow movement speed v1 and stopped at once, but once decelerated to the stop speed v2, and the plate cylinder 6 is stopped after maintaining the speed for a while, the moment of inertia Since the variation in the stop position of the plate cylinder 6 due to the influence of the above can be minimized, the plate cylinder 6 can be accurately stopped at a predetermined stop position. Thereby, it is possible to operate the automatic printing plate mounting apparatus 10 normally.

[Second Embodiment]
Next, the configuration of the offset rotary printing press according to the second embodiment of the present invention will be described with reference to FIGS. 16 and 17. The offset rotary printing press according to the second embodiment is different from the offset rotary printing press according to the first embodiment only in the movable base member, the guard bracket, and the plurality of presser roller members of the automatic plate mounting device. Therefore, only the different configuration will be described, and description of the common configuration will be omitted. 16 and 17, the same reference numerals as those of the automatic plate mounting apparatus 10 according to the first embodiment denote the same components as those of the automatic plate mounting apparatus 10 according to the first embodiment. It means that they have the same structure. FIG. 16 is a schematic view showing a partially omitted state of the automatic plate mounting apparatus 10 ′ according to the second embodiment when viewed from the bottom surface direction (plate cylinder 6 side), and FIG. 17 is a diagram illustrating the second embodiment. It is the schematic which shows the state which looked at plate press mechanism 20 'which concerns on the side surface direction.

  As shown in FIGS. 16 and 17, the automatic press plate mounting apparatus 10 ′ according to the second embodiment is provided with a press plate holding mechanism 20 ′ for each press plate 7. The four plate presser mechanisms 20 'are configured to operate independently of each other. Specifically, each of the movable base member 24 ′ and the guard bracket 26 ′ has a length substantially equal to the horizontal length of the printing plate 7, and one is provided for one printing plate 7. It has been. In the present embodiment, since four plates 7 of one page are mounted side by side in the axial direction, there are four movable base members 24 ′ and guard brackets 26 ′ along the longitudinal direction of the fixed base member 12. It is provided side by side. A guard bracket 26 ′, a guard member 27, and a plurality of pressing roller members 28 a ′ and 28 b ′ are attached to these four movable base members 24 ′, respectively. The four movable base members 24 'are connected to an air cylinder 22 and a linear guide provided on the fixed base member 12, and are configured to be independently operable.

  The plurality of presser roller members 28a 'and 28b' according to the second embodiment, like the plurality of presser roller members 28a and 28b according to the first embodiment, are pushed projections 27a (not shown) of each guard member 27. And one peripheral pressing roller member 28a 'disposed at a position corresponding to the pressing projection 27a and two peripheral pressing roller members 28b' disposed at positions other than the corresponding position. The center pressing roller member 28a 'and the peripheral pressing roller member 28b' have the same diameter, and are configured to press the plate 7 against the peripheral surface of the plate cylinder 6 with a uniform pressing force. Yes. The two peripheral pressing roller members 28b 'are arranged in alignment along the axial direction of the plate cylinder 6 so that the rotation axes are coaxial with each other. As shown in FIGS. 16 and 17, the center pressing roller member 28 a ′ is only a minute distance x (for example, 1 to 5 mm) upstream of the two peripheral pressing roller members 28 b ′ in the forward direction of the plate cylinder 6. The position is shifted.

  According to the printing plate automatic mounting apparatus 10 'according to the second embodiment as described above, the printing plate pressing mechanism 20' is provided for each printing plate 7, and the plurality of printing plate pressing mechanisms 20 'are independently provided. Since it is configured to operate, it is possible to operate only the plate pressing mechanism 20 'and the plate attaching / detaching operation mechanism 30 corresponding to the printing plate 7 that needs to be mounted or removed. In particular, at the time of mounting, the operator presses the corresponding plate holding mechanism 20 ′ in a state in which the gripper side end portion 7 a of the printing plate 7 is firmly locked to the edge portion of the printing plate mounting groove 6 b of the plate cylinder 6. Therefore, the mounting accuracy of the printing plate 7 can be further improved.

  Further, according to the automatic printing plate mounting apparatus 10 'according to the second embodiment, the center press roller member 28a' is arranged with the position shifted upstream in the forward direction of the plate cylinder 6 relative to the peripheral press roller member 28b '. Accordingly, it is possible to press the substantially central portion in the lateral direction of the printing plate 7 by the central pressing roller member 28a ′ prior to the peripheral pressing roller member 28b ′. As a result, the pressing projection 27a and the center pressing roller member 28a ′ can cooperate to press the vicinity of the tail edge side end portion 7b of the printing plate 7 toward the printing plate mounting groove 6b. The opening end of the notch portion 7c of the tail edge side end portion 7b can be further widened, and the fitting of the notch portion 7c of the tail edge side end portion 7b to the register pin 6c of the plate cylinder 6 is further enhanced. It becomes possible to carry out smoothly and reliably. Further, in the state in which the printing plate 7 is pressed against the peripheral surface of the plate cylinder 6 with a uniform pressing force by the central pressing roller member 28a 'and the peripheral pressing roller member 28b', each peripheral pressing roller 28a 'is moved from the central pressing roller member 28a'. Since it is possible to apply a pressing force to the printing plate 7 in the direction toward the member 28b ', that is, in the direction from the lateral center of the printing plate 7 toward both ends, the mounting accuracy of the printing plate 7 Can be further improved.

  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 6 has been described as a so-called 4 (W) × 1 (L) type plate cylinder, but is not limited to this, for example, so-called 4 (W) × Various plate cylinders such as a 2 (L) type cylinder can be used. Further, the printing plate 7 has been described as having a size corresponding to one page of newspaper and mounted in a line along the axial direction of the plate cylinder 6, but the present invention is not limited to this. It is possible to use various printing plates such as a printing plate having a size corresponding to.

  In the above-described embodiment, the plate automatic loading apparatuses 10 and 10 ′ have been described as including the fixed base member 12, the plate pressing mechanism 20 and 20 ′, the plate attachment / detachment operation mechanism 30, and the front cover 16. The press roller members 28 a, 28 b, 28 a ′ and 28 b ′ configured to be movable back and forth with respect to the peripheral surface of the plate cylinder 6, and the vicinity of the tail edge side end portion 7 b of the printing plate 7 are printed on the plate. It is only necessary to have at least a push-in projection 27a configured to be pressed toward the plate mounting groove 6b of the cylinder 6. In addition, although it has been described that the pressing protrusion 27a is configured to be able to advance and retreat with respect to the peripheral surface of the plate cylinder 6 together with the plurality of pressing roller members 28a, 28b, 28a ′, 28b ′, the present invention is not limited thereto, Only the pressing roller members 28 a, 28 b, 28 a ′, and 28 b ′ may be configured to be able to advance and retreat with respect to the peripheral surface of the plate cylinder 6.

  In the above-described embodiment, three pressing roller members 28a, 28b, 28a ′, and 28b ′ are described as being provided for one printing plate 7. However, the present invention is not limited to this, and the number of pressing roller members installed is not limited thereto. Can be any number. Further, although the pressing roller members 28a, 28b, 28a ', 28b' have been described as being composed of the central pressing roller members 28a, 28a 'and the peripheral pressing roller members 28b, 28b', the present invention is not limited to this. The roller member can be arranged at an arbitrary position.

  In the above-described embodiment, it has been described that the process of removing the printing plate 7 from the plate cylinder 6 is executed when the plate removal button is pressed. However, the present invention is not limited to this. The automatic loading apparatuses 10 and 10 ′ and the plate cylinder 6 may be automatically operated to perform a process of removing the printing plate 7 from the plate cylinder 6.

  2a, 2b Printing unit, 3 operation section, 4 ink supply device, 6 plate cylinder, 6a mounting shaft, 6b printing plate mounting groove, 6c register pin, 6d operation opening, 7 printing plate, 7a tail end side, 7b End of tail edge, 7c Notch, 8 Blanket cylinder, 10, 10 'Plate automatic loading device, 12 Fixed base member, 13 Linear motion guide, 13a Linear bush, 13b Shaft, 14 Bracket, 16 Front cover , 20, 20 'printing plate pressing mechanism, 22 air cylinder, 23 cylinder rod, 24, 24' movable base member, 26, 26 'guard bracket, 27 guard member, 27a pushing projection, 28a, 28a' central pressing roller member (Pressing roller member), 28b, 28b 'peripheral pressing roller member (pressing roller member), 30 printing plate attaching / detaching operation mechanism 32 bracket, 34 air cylinder, 36 cylinder rod, 38 lever pressing member, 50 printing plate clamping mechanism, 52a to 52d first to fourth operation mechanisms, 54 operation lever, F frame, R printing plate mounting area, v1 slow moving speed , V2 Speed just before stopping

Claims (5)

A plate end having a notch that can be fitted to the register pin with respect to a plate cylinder having a plate mounting groove extending in the axial direction and a register pin provided in the plate mounting groove. And a plate automatic loading device for loading a plate having a tail edge side end,
A plurality of presser rollers configured to be movable back and forth with respect to the circumferential surface of the plate cylinder and configured to be rotatable along the circumferential direction of the plate cylinder around a rotation axis parallel to the axial direction of the plate cylinder. A member,
A pressing projection provided at a position aligned with the register pin, and configured to be able to press the vicinity of the tail edge side end portion of the printing plate toward the plate mounting groove of the plate cylinder,
The plurality of pressing roller members have the same diameter, and are configured to be able to press the plate against the circumferential surface of the plate cylinder at an advanced position advanced toward the circumferential surface of the plate cylinder. ,
At the time of mounting the printing plate on the plate cylinder, with respect to the plate cylinder rotating in the forward direction in a state where the grip side end portion of the printing plate is locked to the edge portion of the printing plate mounting groove, Pressing the printing plate with the plurality of pressing roller members, and pressing the tail edge side end portion of the printing plate that has reached the printing plate mounting groove into the printing plate mounting groove with the pressing protrusion, An automatic printing plate mounting apparatus, wherein the register pin is configured to fit the notch formed at the tail edge side end portion into the register pin. The printing plate automatic mounting apparatus according to claim 1,
The plurality of pressing roller members include a central pressing roller member disposed at a position corresponding to the pressing protrusion, and a plurality of peripheral pressing roller members disposed at positions other than the position corresponding to the pressing protrusion.
The central press roller member and the plurality of peripheral press roller members are arranged in alignment along the axial direction of the plate cylinder so that the rotation axes thereof are coaxial with each other. . The printing plate automatic mounting apparatus according to claim 1,
The plurality of pressing roller members include a central pressing roller member disposed at a position corresponding to the pressing protrusion, and a plurality of peripheral pressing roller members disposed at positions other than the position corresponding to the pressing protrusion.
The plurality of peripheral pressing roller members are arranged in alignment along the axial direction of the plate cylinder such that the rotation axes are coaxial with each other,
The plate press automatic mounting device, wherein the central pressing roller member is arranged on the upstream side in the forward direction of the plate cylinder with respect to the plurality of peripheral pressing roller members. The printing plate automatic mounting device according to any one of claims 1 to 3,
The plate cylinder has a printing plate clamping mechanism disposed in the printing plate mounting groove,
The printing plate clamping mechanism includes a locking bar member configured to be able to lock the tail edge side end portion of the printing plate, and an operation lever connected to the locking bar. The locking bar is configured to rotate when operated,
The printing plate automatic mounting device further includes a printing plate attaching / detaching operation mechanism provided at a position corresponding to the operation lever of the printing plate clamping mechanism and configured to be movable back and forth with respect to the operation lever.
The printing plate attaching / detaching operation mechanism is configured to move forward with respect to the operation lever and rotate the locking bar member by operating the operation lever. An automatic plate mounting device according to any one of claims 1 to 4,
An offset rotary printing press comprising: a printing plate mounting groove extending along an axial direction; and a plate cylinder having a register pin provided in the printing plate mounting groove.

Images