JP2002036490A - Printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a defective plate from being made by improving the precision of the plate making. SOLUTION: An exposure apparatus 39 is mounted movably in the arrow A-B direction on a table 38, and a pipe 82 with a screw hole 82a is fixed. An adjustment member 85 is composed of a fixed member 86, a movable member 87 which can move in relation to the member 86, and a differential screw 90 having screw parts 88 and 89 of different pitches. The fixed member 86 is fixed to the table 38 by engaging a thumbscrew 93 with a screw hole 38b of the table 82. A screw 96 penetrating the movable member 87 is engaged with the screw hole 82a of the pipe 82. The screw part 89 of the differential screw 90 is engaged with the fixed member 86, and the screw part 88 is engaged with the movable member 87.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing press provided with a plate making apparatus for making a plate on a plate mounted on a plate cylinder of a printing unit.

[0002]

2. Description of the Related Art Generally, it is required to improve the efficiency of a plate making operation and to reduce the installation space of a plate making apparatus in plate making. For this reason, in recent years, plate making operations are performed directly on a printing press by a plate making device attached to the printing press itself without providing the plate making device independently of the printing press. That is, after the unprinted plate is mounted on the plate cylinder in the printing unit, the plate making device is moved to bring the head of the plate making device close to the plate cylinder. Next, the printing plate is made by moving the head in the axial direction of the plate cylinder simultaneously with the rotation of the plate cylinder. On the other hand, when performing maintenance such as cleaning and replacement of components of the plate making apparatus such as the head, the plate making apparatus is separated from the printing unit, and the head is removed from the support member.

[0003]

When performing a plate making operation, it is necessary to attach the head to the support member again, and the position of the head with respect to the plate cylinder is not always at the same position as when the head is removed from the support member. Therefore,
When the plate making device is brought close to the plate cylinder, the distance between the head and the plate cylinder does not become a predetermined distance, so that the position of the head with respect to the plate cylinder varies, plate making accuracy is reduced, and plate making defects occur. There was a problem.

It is an object of the present invention to provide a printing machine in which plate making defects are prevented by improving plate making accuracy.

[0005]

In order to achieve the above object, according to the present invention, there is provided a printing press having a plate making apparatus for making a plate on a plate mounted on a plate cylinder of a printing unit. A plate making device comprising: a support member supported on the frame side of the printing press; and a support member detachably attached to the support member and performing plate making on a printing plate mounted on a plate cylinder. And a support portion for detachably supporting an adjusting tool for adjusting the position of the support member with respect to the support member. Therefore, the detached head is attached to the support member again, and after the plate making device is brought close to the plate cylinder, the position of the head with respect to the plate cylinder is adjusted by the adjusting tool.

According to a second aspect of the present invention, in the first aspect of the present invention, a fixing means for fixing the head to the support member is provided. Therefore, the state of the head whose position with respect to the plate cylinder has been adjusted by the adjusting tool is maintained.

According to a third aspect of the present invention, in the first aspect of the present invention, the plate making device is provided near the printing unit. Therefore, a work space between the printing units is secured.

According to a fourth aspect of the present invention, in the first aspect of the present invention, screw holes are respectively provided on the support member side and the head side of the plate making apparatus, and the adjusting tool is connected to the screw on the support member side. A fixing member screwed into the hole and detachably attached thereto, a movable member screwed into the screw hole on the head side and detachably attached and provided movably with respect to the fixing member; And a differential screw for adjustment screwed to the movable member. Therefore, when the fixed member and the movable member of the adjusting tool are attached to the support member and the head of the plate making apparatus, respectively, and the differential screw for adjustment is rotated, the movable member moves with respect to the fixed member. The head moves.

According to a fifth aspect of the present invention, in the first aspect of the invention, screw holes are provided on the support member side and the head side of the plate making apparatus, respectively, and the adjusting tool is connected to the screw on the support member side. A fixing member screwed into the hole and detachably attached thereto, a movable member screwed into the screw hole on the head side and detachably attached and provided movably with respect to the fixing member; The screw and the movable member are integrally formed by a screw that is screwed together and can move forward and backward. Therefore, when the fixed member and the movable member of the adjusting tool are attached to the support member and the head of the plate making apparatus, and the screw is rotated, the movable member moves integrally with the fixed member because the screw moves freely with respect to the fixed member. Then, the head moves with respect to the support member.

According to a sixth aspect of the present invention, in the first aspect of the present invention, screw holes are respectively provided on a support member side and a head side of the plate making apparatus, and the adjusting tool is connected to the screw on the support member side. A fixing member screwed into the hole and detachably attached thereto, a movable member screwed into the screw hole on the head side and detachably attached and provided movably with respect to the fixing member; The movement in the axial direction is restricted, the rotation is supported, and the screw is screwed to the movable member. Therefore, when the fixing member and the movable member of the adjusting tool are attached to the support member and the head of the plate making apparatus, respectively, and the screw is rotated, the movable member moves, so that the head moves relative to the support member.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the entire appearance of a printing press according to the present invention. FIG. 2 (a) is a side view showing a main part of the same part, and FIG. 2 (b) is a view taken in the direction of the arrow I in FIG. 2 (a). FIG. 3 is a plan view showing the essential parts, and FIG. 4 is a perspective view schematically showing the appearance of the essential parts. FIG. 3A shows a state in which the opening of the printing unit is closed by a plate making apparatus. FIG. 2B shows a state in which the opening of the printing unit is opened. FIG. 5 is a perspective view schematically showing a main part in a state where a cover and a plate making device are removed. FIG.
FIG. 7A is a front view of the main part, FIG. 7A is a side view showing a part of the plate making device of the printing press, and FIG. 7B is a view taken in the direction of the arrow II in FIG.

FIG. 8 is a perspective view schematically showing a base unit of the plate making apparatus. FIG. 9 is a plan sectional view of the base unit. 10A is a side view of the plate making apparatus, FIG. 10B is a view taken in the direction of an arrow III in FIG. 10A, and FIG. 10C is an enlarged view of an IV section in FIG. FIG. 11 is a perspective view of the guide structure of the exposure apparatus viewed from the rear side. FIG. 12 is a perspective view of the guide structure of the exposure apparatus viewed from the front side. FIG. 13A is a plan view showing a part of the structure for adjusting the position of the exposure apparatus, and FIG. 13B is a side view showing a part of the structure. FIG. 14 is a perspective view schematically showing a structure for adjusting the position of the exposure apparatus.

FIG. 1 schematically shows a printing press according to an embodiment of the present invention. In FIG. 1, a printing press 1 includes a paper feeding device 3 that feeds paper one by one, and prints paper fed from the paper feeding device 3 in order in the paper conveyance direction for each ink color. Printing units 4-1, 4-2, 4-3, 4-4
A paper discharging device 5 for discharging paper printed by the printing units 4-1 to 4-4, and a control device 6 for controlling the entire printing press 1
It is composed of

The printing machine 1 is selectively operated at a first speed at which paper is supplied from the paper feeding device 3 to enable printing, and at a second speed lower than the first speed. You. At the second speed, the blanket wound around the blanket cylinder and the plate are exchanged without supplying the paper from the paper feeding device 3. Further, in order to confirm whether the printing pressure between the blanket cylinder and the impression cylinder is appropriate, maintenance such as performing printing and checking the printing pressure state is performed.

Between the four printing units 4-1 to 4-4 and between the printing unit 4-4 and the paper discharge device 5, a work space 8-- for performing plate replacement and maintenance of the ink device and the like is provided. 1, 8-2, 8-3 and 8-4 are provided. In each of the printing units 4-1 to 4-4, an inking device (not shown) having a roller group, a water supply device (not shown), and a pair of frames 9A and 9B (FIG. 5) are rotatably provided. A supported plate cylinder 10, a blanket cylinder 11, an impression cylinder (not shown), and the like are provided. As shown in FIGS. 4 and 5, on the upper portions of the frames 9A and 9B, high wall portions 9a and lower wall portions 9b are alternately formed in a comb shape.

Since all the printing units 4-1 to 4-4 have the same structure, the printing unit 4-2 and the plate making device 35 attached to the printing unit 4-2 will be described below. In FIG. 2A, a notch (not shown) extending in the axial direction (a direction orthogonal to the paper conveying direction) is formed in the outer peripheral portion of the plate cylinder 10. In the notch, there are provided a grip-side vise device 12 for gripping the grip-side end of the plate and a butt-side vise device 13 for gripping the butt-side end of the plate. The pair of levers 15 are attached to the shafts 16 on the frames 9A and 9B.
Is swingably supported via the. A guide roller 17 extending in the axial direction of the plate cylinder 10 is pivotally supported at the tip of the lever 15.

The lever 15 is swingably driven by a driving device (not shown). The swing of the lever 15 causes the guide roller 17 to reciprocate in a direction approaching and separating from the peripheral surface of the plate cylinder 10. As a result, the guide rollers 17 are in a standby position (solid line), a guide position (two-dot chain line) for guiding the old plate 23B at the time of plate discharging, and a new plate 23A which is in contact with the peripheral surface of the plate cylinder 10.
Is mounted on a plate mounting position (dashed line) for mounting on the peripheral surface of the plate cylinder 10.

The U-shaped new plate mounting guide member 19, which is cantilevered by a pair of legs 19a, is attached to the front surface (the paper transport direction side) of an upper cover 21 that closes the upper portion of the printing unit 4-2. Can be The guide member 19 is a new plate 23A which is inserted into the holding plate vice device 12 of the plate cylinder 10.
Guide. An opening 22 is formed below the upper cover 21 of the printing unit 4-2, that is, on the front side of the plate cylinder 10. Through the opening 22, exchange of a plate and maintenance of a roller and the like are performed. As shown in FIG. 2B, a detection switch 24 is attached to the low wall portion 9b of one frame 9B. As will be described later, the detection switch 24 detects that the plate making device 35 has moved from an operating position where plate making is performed to a retreat position (non-operating position) where plate exchange work is possible.

As shown in FIGS. 4 (a) and 4 (b), a pair of plate making device attachment / detachment detection sensors 25A and 25B are provided on the plate making device 35 side at the lower end of the front surface of the upper cover 21 above the opening 22. It is attached. As shown in FIG. 5, a guide member 26 is provided on each upper end surface of the low wall portion 9b of the frames 9A and 9B.
A and 26B are fixed. Guide grooves 26a are formed on the upper surfaces of the guide members 26A and 26B so as to extend in the paper transport direction (the direction of the arrow AB). An origin dog 27 is fixed to an inner side surface of the high wall portion 9a of the frame 9A near the paper transport direction. Below the origin dog 27, an approximately cubic engagement block 31 as a restricting means is fixed.

A vertically extending V-shaped engaging recess 32 is formed on the end face of the engaging block 31 on the paper transport direction side. The engagement recess 32 is located in the axial direction of the plate cylinder 10 (arrows CD).
Direction) and an inclined surface 32b inclined to the other side. Engaging recess 3
2 is formed in a V-shape, the inclined surfaces 32a, 32 are moved in the moving direction (direction of arrow A) of the plate making device 35 to the operating position.
The interval b (the width of the recess) gradually narrows.

On the respective inner surfaces of the high wall portions 9a of the frames 9A and 9B, cylindrical engagement pins 29A and 29B are provided so as to face each other at a position between the origin dog 27 and the engagement block 31. You. Engagement projections 30A, 30B are fixed below the engagement pins 29A, 29B.

Next, the plate making apparatus 35 will be described. In FIG. 2A, the plate making device 35 includes a base unit 3
6, a base 37 fixed on the base unit 36,
It comprises a table 38 movable on the base 37 in the axial direction of the plate cylinder 10, and an exposure device 39 having a head 40 and integrated on the table 38 to perform plate making on a printing plate. The exposure device 39 performs laser irradiation (exposure) from the head 40 while moving in the axial direction of the plate cylinder 10 to
The picture is printed on the entire printing plate attached to the "0".

Next, the base unit 36 of the plate making apparatus 35 will be described with reference to FIGS. 7, 8, 9 and 10. 8, the base unit 36 includes a box-shaped base frame 43 extending in the axial direction of the plate cylinder 10 (the direction of arrow CD). The base frame 43 includes a rectangular upper plate 44, a pair of side plates 45A and 45B, and a window 46.
A, 46B. The upper plate 44 and the front plate 46 have an L-shaped cross section. Front plate 46
A substantially cubic engagement block 48A, 48B as a restricting means is fixed to the upper corners of both ends of the fin.

On the front end surfaces of the engagement blocks 48A and 48B, engagement recesses 49 extending in a V-shape in the horizontal direction are formed. The engagement concave portion 49 has an upper inclined surface 49 that faces obliquely upward.
a and a downwardly inclined surface 49b facing obliquely downward. Since the engaging recess 49 is formed in a V-shape, the moving direction of the plate making device 35 to the operating position (arrows AB)
), The interval between the inclined surfaces 49a and 49b (the width of the recess) becomes narrower.

The engaging recesses 4 of the engaging blocks 48A, 48B
As shown in FIG. 7A, the engagement pins 29A, 2
9B engages. Thereby, the movement of the plate making device 35 in the vertical direction (the direction of the arrow EF) is regulated, and the plate making device 35 is positioned with respect to the plate cylinder 10 in the vertical direction (the direction of the arrow EF). As described above, the engagement blocks 48 that engage with the engagement pins 29A and 29B are provided at both ends of the plate making device 35.
By providing A and 48B, the plate making device 35 is positioned without being inclined in the longitudinal direction. As a result, the plate making device 35 is accurately positioned, plate making with high accuracy is possible, and print quality is improved.

In FIGS. 7 (a) and 7 (b), reference numeral 50 denotes an engagement pin having a threaded portion 50b formed at the base and a tip 50a formed in a hemispherical shape. The screw portion 50b is screwed below the engagement block 48A of the front plate 46 of the base frame 43, and the tip portion 50a protrudes. Tip 5 of engagement pin 50
Oa engages with the engagement recess 32 of the block 31. Thereby, the movement of the plate making device 35 in the axial direction (the direction of arrow CD) of the plate cylinder 10 is regulated, and the plate making device 35 is positioned with respect to the plate cylinder 10.

When the engagement pin 50 is rotated, the engagement pin 5
0 advances from the front plate 46, and the position of the tip 50a is adjusted. Thus, the verticality of the plate making device 35 is adjusted. At this time, since the distal end portion 50a of the engagement pin 50 is hemispherical, despite the rotation of the engagement pin 50,
The distal end portion 50a is held in a state where the distal end portion 50a is accurately engaged with the engagement concave portion 32 of the engagement block 31. Therefore, the engagement pin 5
The adjustment of the direction perpendicular to the paper conveying direction and the verticality of the plate making device 35 by the cooperation of the engagement block 31 and the zeros is performed accurately.

A pair of side plates 45A of the base frame 43,
45B, as shown in FIG.
Two pairs of wheels 53A, 53B engaged with the respective guide grooves 26a of 6A, 26B are attached. The substantially L-shaped and inverted L-shaped levers 51A and 51B have a pin 52 at the center.
It is rotatably supported by side plates 45A and 45B via 52. Wheels 53A, 53 are provided at the lower ends of the levers 51A, 51B.
B is pivoted. A slide shaft 54 is inserted through the insertion hole of the spring receiving member 55 fixed to the side plates 45A and 45B. One end of the sliding shaft 54 is connected to the levers 51A, 51 via pins 56.
It is pivotally attached to the upper end of 1B.

A nut 57 is provided on the thread at the other end of the sliding shaft 54.
Is screwed. A compression coil spring 58 is elastically mounted between the nut 57 and the spring receiving member 55. Compression coil spring 58
Lever 51A is urged clockwise in the figure around the pin 52 as a rotation center, and the lever 51B is
It is urged in the counterclockwise direction in FIG. Thus, the plate making device 35 is supported movably between the operating position and the retracted position and adjustable vertically in the vertical direction against its own weight. FIG. 10C shows the outer peripheral portions of the wheels 53A and 53B.
As shown in FIG. 7, a narrow and ring-shaped engagement ring 53a is integrally formed. Guide grooves 2 of guide members 26A and 26B
The width of 6a is formed larger than the width of engagement ring 53a by 2δ.

As shown in FIG. 9, a pair of actuators 60A and 60B are pivotally attached to a bracket 61 fixed to the back surface of the front plate 46 of the base frame 43 via pins 62 so as to face each other. Actuators 60A, 60
B is provided with a fixed detection sensor 63a and a fixed release detection sensor 63b that detect the advance and retreat of the rod 64. One end of a lever 65 is pivotally connected to the tip of the rod 64. The other end of the lever 65 projects from the window 46 a to the outside of the base frame 43, and is pivotally connected via a pin 67 to a bracket 66 fixed to the outside of the front plate 46.

A hook 65a is formed at the other end of the lever 65. By retreating the rod 64, each hook 65
a engages with the engaging projections 30A, 30B, and the base unit 36 is fixed to the frames 9A, 9B. At the same time, the fixing detection sensor 63a detects that the base unit 36 is fixed. On the other hand, as the rod 64 advances, the hook 65a of the lever 65 and the engagement projection 30A,
The engagement with 30B is released. At the same time, the release of the base unit 36 is detected by the release detection sensor 63b. Thus, the actuators 60A, 60B connect the plate making device 35 to the frames 9A, 9B.
And a function of detecting whether the plate making device 35 is fixed or released. As a result, since the members that control both functions can be shared, not only the number of parts is reduced but also the structure is simplified.

Next, FIG. 7A, FIG. 11, FIG.
The moving structure of the exposure device 39 in the axial direction of the plate cylinder 10 (the direction of arrow CD) will be described using FIG. FIG.
3A, the base 37 extends in the axial direction of the plate cylinder 10 and is fixed on the upper plate 44 of the base frame 43. At both ends of the base 37, as shown in FIG.
0A and 70B are erected so as to face each other. Side plate 70A
, A motor 71 selectively driven in the forward / reverse direction is fixed. The rotation of the motor shaft of the motor 71 is controlled by the side plate 70.
It is transmitted to a ball screw 72 which is rotatable between A and 70B and whose movement in the axial direction is restricted.

A pair of parallel rails 73 extending at predetermined intervals in the axial direction of the plate cylinder 10 (in the direction of arrow CD) are attached to the upper surface of the base 37. As shown in FIG. 12, four sliders 75 that fit into the respective rails 73 and guide the table 38 along the rails 73 in the directions of arrows CD are fixed to the lower surface of the table 38. As shown in FIG. 14, a screw hole 38a into which the ball screw 72 is screwed is formed in the side end surface of the table 38 in the axial direction of the plate cylinder 10 so as to pass therethrough. By driving the motor 71 in the forward / reverse direction, the table 38 moves in the direction of the arrow CD via the ball screw 72.

The exposure device 39 is movably mounted on the table 38 in the paper transport direction, that is, in the direction approaching and separating from the plate cylinder 10 (the direction of arrows AB). Exposure device 39
Is fixed to the table 38 by a pair of holding plates 84A and 84B (FIG. 14) described later, and moves integrally with the table 38. As shown in FIG. 3, an exposure device origin sensor 76 for detecting the origin dog 27 fixed to the frame 9A is attached to the table 38. When the plate making device 35 moves in the direction of arrow D by driving the motor 71, the exposure device origin sensor 76 detects the origin dog 27. By detecting the origin dog 27, the movement of the plate making device 35 is stopped, and the exposure start position of the head 40 on the plate mounted on the plate cylinder 10 is determined.

As described above, the exposure start position for the printing plate is determined by the exposure device origin sensor 76, so that the exposure is always started from the same position and the misregistration of the printing plate can be prevented. Moreover, since the origin dog 27 is fixed to the frame 9 and the exposure device origin sensor 76 is fixed to the table 38, the head 4 in the axial direction of the plate cylinder 10 can be moved.
The position of 0 can be detected with reference to the frame 9A. Therefore, the position of the head 40 can be accurately detected without being affected by the positional accuracy at the operating position of the plate making device 35 and the positional accuracy of the head 40 with respect to the plate making device 35. This enables high-precision plate making,
Print quality is improved.

A cover 77 for closing the entire plate making device 35.
As shown in FIG. 6, a pair of detected members 78A and 78B is attached to the upper part on the front side of the device. Detected member 78
4A and 7B, when the plate making device 35 approaches the printing unit 4-2 and closes the opening 22, as shown in FIGS. 4 (a) and 4 (b), the plate making device attachment / detachment detection sensors 25A and 25B
Is detected by That is, the plate making device 35 is detected by the plate making device attachment / detachment detection sensors 25A, 25B and the detected members 78A, 78B to be in the operating position. The detected members 78A and 78B are formed of, for example, light projecting elements, and the plate making device attachment / detachment detection sensors 25A and 25B.
Is composed of a light receiving element. When it is detected that the plate making device 35 is located at the operating position, the control device 6 puts the printing press 5 into a printable mode. Also, the plate making device 35
When it is not detected that is located at the operating position, the control unit 6 sets the printing press to the printing disabled mode.

At the lower end of the cover 77 on the frame 9B side,
As shown in FIGS. 2A and 2B, a cam 79 for operating the detection switch 24 is attached. A notch 79a is formed at the rear end of the cam 79. In such a configuration, the plate making device 35 moves from the operating position indicated by the solid line for plate making to the direction away from the plate cylinder 10 (the direction of arrow B), and moves to the non-operating position indicated by the two-dot chain line to be retracted during plate replacement. I do. At this time, the notch 79a of the cam 79 faces the detection switch 24. By detecting the notch 79a of the detection switch 24, the control device 6 enables the printing press 1 to perform a plate changing operation.

Next, referring to FIGS. 13 and 14, the direction in which the exposure device 39 approaches and separates from the plate cylinder 10 (arrow A).
A structure for fine adjustment in the (−B direction) will be described.
In the center of the lower end surface of the exposure device 39, as shown in FIG.
A groove 81 having a rectangular cross section extending in the direction of arrow AB is formed. A cylindrical pipe 82 having a screw hole 82 a is fixed in the groove 81. In the center of the upper surface of the table 38,
A groove 83 having a V-shaped cross section extending in the direction of arrow AB is formed corresponding to groove 81. The exposure device 39 is removably mounted on the table 38 so as to accommodate the pipe 82 in the groove 83. A pair of holding plates 84A and 84B are arranged on both sides of the exposure device 39 facing the plate cylinder 10 in the axial direction.

In such a configuration, the exposure device 39 is movably mounted on the table 38 in a direction (arrow AB direction) approaching and separating from the plate cylinder 10 via the pipe 82. By operating the driving means (not shown), the exposing device 39 and the table 38 are clamped by the clamping plates 84A and 84B, thereby fixing the exposing device 39 on the table 38. On one end surface of the table 38, a pair of screw holes 38b, 38b into which the thumb screws 93 are screwed are formed.

The adjusting member 85 includes a rectangular parallelepiped fixing member 86.
And a substantially cubic movable member 87 that is movable in the directions of arrows AB, and a differential screw 90 that makes the movable member 87 movable with respect to the fixed member 86. The pair of guide members 94 </ b> A and 94 </ b> B face each other at a distance slightly larger than the width of the movable member 87, and form a U-shape together with the mounting plate 95. The guide members 94A and 94B are fixed to the rear end surface of the fixing member 86 by screws. Differential screw 90
Has a threaded portion 88 and a threaded portion 89 having a smaller pitch than the pitch of the threaded portion 88 integrally formed on the distal end side of the threaded portion 88. A handle 91 is integrally attached to the proximal end of the screw portion 88.

The screw portion 88 of the differential screw 90 is a movable member 87
Is screwed through the screw hole of the fixing member 8.
Screw into the 6 screw hole. The movable member 87 includes the guide member 9.
It is guided in the direction of arrow AB so as to be sandwiched between 4A and 94B. 92 is a pair of spacing members attached to the front end of the fixed member 86, 93 is a thumb screw screwed into the screw hole of the fixed member 86, and 96 is screwed into the screw hole of the movable member 87. Screw.

In such a configuration, the fixing member 86 is fixed to the table 38 by screwing the thumb screws 93 into the screw holes 38b of the table 38. Also, screw 9
By screwing 6 into the screw hole 82a of the pipe 82, the movable member 87 and the pipe 82 are integrated. The holding by the holding plates 84A and 84B is loosened, the exposure device 39 can be moved relative to the table 38 in the directions of arrows AB, and the handle 91 is rotated clockwise.

The pitch of the screw portion 88 screwed to the movable member 87 is larger than the pitch of the screw portion 89 screwed to the fixed member 86, and the fixed member 86 is fixed to the table 38. Therefore, the movable member 87 with respect to the screw portion 88 in the B direction is larger than the moving amount of the screw portion 88 in the A direction.
The movable member 87 slightly moves in the arrow B direction. At this time, the pipe 82 integrated with the movable member 87 also slides in the groove 82 and slightly moves in the direction of arrow B. As a result, the exposure device 39 to which the pipe 82 is fixed also slightly moves in the direction of arrow B, and the exposure device 39 is finely adjusted with respect to the table 38 in the direction in which the exposure device 39 approaches and separates from the plate cylinder 10 (in the direction of arrow AB). Is done. As described above, since the adjusting tool 85 is configured by the fixed member 86, the movable member 87, and the differential screw 90, the number of components is minimized, the structure is simplified, and the manufacturing cost is reduced.

It should be noted that a screw portion 88 screwed to the movable member 87
Is smaller than the pitch of the screw portion 89 screwed to the fixed member 86, the movable member 87 moves in the A direction with the clockwise rotation of the handle 91. Thus, the exposure device 39 is finely adjusted in the direction A.

Next, the plate making operation of the printing press having such a configuration will be described. First, as shown in FIG. 4B, for plate replacement or maintenance of an inking device, etc.
The opening 22 of the printing unit 4B is opened. At this time,
The plate making device 35 is separated from the printing unit 4B in the direction of arrow B, and is located on the opposite side in the work space 8-2, ie, in FIG.
It is positioned at the retreat position (non-operation position) indicated by the two-dot chain line in FIG. At the retracted position, the plate making device attachment / detachment detection sensors 25A and 25B do not detect the detected members 78A and 78B, so that the control device 6 prints in a state where operation at the first speed is disabled, that is, a state where normal printing cannot be performed. Machine 1
Control.

The wheels 53A, 53B are connected to the guide members 26A,
By rolling on the guide grooves 26a, 26a of the 26B, the plate making device 35 moves in the direction of arrow A from the retracted position,
It is positioned at the operating position shown by the solid line in FIG. At this time, the head 40 comes close to the outer periphery of the plate cylinder 10 and the plate making operation can be performed. In the operating position, the engaging recesses 49 of the engaging blocks 48A, 48B of the plate making device 35 are engaged with the engaging pins 29A, 2B of the frames 9A, 9B as shown in FIG.
9B, and the plate making device 35 is positioned vertically (up and down).

At the same time, the tip 50a of the engaging pin 50 of the plate making device 35 engages with the engaging recess 32 of the engaging block 31 of the frame 9A. Since the engaging recess 32 extends in the vertical direction as described above, the engaging pin 50 of the plate making device 35 is allowed to move in the vertical direction along the engaging recess 32. Therefore, the engagement blocks 48A, 48B and the engagement pins 29
A and 29B allow accurate positioning of the plate making device 35 in the vertical direction.

Further, even when the plate making device 35 moves vertically (positional displacement) during positioning in the vertical direction, the movement (positional displacement) is absorbed by the compression coil spring 58. Therefore, the positioning of the plate making device 35 can be performed only by moving the plate making device 35 to the operating position. As a result, plate making accuracy and printing accuracy are improved, and the burden on the operator and the preparation time are greatly reduced, thereby improving the productivity.

The tip 50a of the engaging pin 50 of the plate making device 35 is engaged with the engaging recess 32 of the engaging block 31 of the frame 9A, thereby positioning the plate making device 35 in the axial direction of the plate cylinder 10. Is made. At this time, the engagement recesses 4 of the engagement blocks 48A and 48B of the plate making device 35 are used.
9 engages with the engaging pins 29A and 29B of the frames 9A and 9B as shown in FIG. The engagement recess 49 is
As described above, since the extension extends in the axial direction of the plate cylinder 10, the movement of the plate making device 35 is allowed such that the engagement recesses 49 slide on the engagement pins 29A and 29B of the frames 9A and 9B.

Further, as shown in FIG.
3B between the engagement ring 53a and the guide groove 26a.
Play is set. Therefore, when positioning the plate making device 35 in the axial direction of the plate cylinder 10, the plate making device 3
Even if the plate 5 moves (displaces) in the axial direction of the plate cylinder 10, the movement of the engagement blocks 48A and 48B in the same direction is allowed, and the movement itself is absorbed by the play 2δ. For this reason, the positioning of the plate making device 35 can be performed only by moving the plate making device 35 to the operation position, and the plate making accuracy and the printing accuracy are improved, and the burden on the operator and the preparation time are greatly reduced, and the productivity is improved. . At this time, when it is necessary to adjust the verticality of the plate making device 35, the adjustment is performed by rotating the engaging pin 50 to advance and retreat the tip portion 50a.

When the plate making device 35 is positioned at a position where plate making is possible, as shown in FIG. 7A, the plate making device attachment / detachment detection sensors 25A and 25B and the detected members 78A and 78B face each other. In this state, the plate making device attaching / detaching detection sensor 2
5A and 25B detect that the plate making device 35 has been positioned at the operating position. When it is detected that the plate making device 35 is at the operating position, the control device 6 drives the actuators 60A and 60B supported by the base frame 43 to retract the rod 64 as shown in FIG. The retraction of the rod 64 causes the hook 65a of the lever 65 to engage with the engaging projections 30A, 30B of the frames 9A, 9B. Thereby, the plate making device 35 is fixed to the frames 9A and 9B in the operating position.

At this time, the actuators 60A, 60B
Each of the fixing detection sensors 63a detects the fixing of the plate making device 35 and outputs a detection signal to the control device 6. Control device 6
Is determined based on the detection signal from the fixed detection sensor 63a and the detection signal from the plate making device attachment / detachment detection sensors 25A and 25B, that is, a state in which plate making is possible and a state in which printing is possible, that is, a state in which operation is possible at the first speed. I do. As described above, the plate making possible state and the printable state are detected by the plate making device attachment / detachment detection sensors 25A and 25B and the fixed detection sensor 63a arranged on the upper and lower parts of the plate making device 35, so that the plate making at the operation position is performed. The vertical positioning of the device 35 is ensured.

When it is necessary to adjust the distance between the head 40 and the peripheral surface of the plate cylinder 10, as shown in FIG. 14, each thumb screw 93 of the adjusting tool 85 is screwed into the screw hole 38b of the table 38.
, The fixing member 86 is fixed to the table 38. Further, the screw 96 is inserted into the screw hole 82a of the pipe 82.
, The movable member 87 and the pipe 82 are integrated. Next, the driving means (not shown) is driven to loosen the holding by the holding plates 84A and 84B, and the exposing device 39 can be moved with respect to the table 38 in the directions of arrows AB. In this state, the table 3 is
For 8, the exposure device 39 is moved in the directions of arrows AB to make fine adjustments. Thereafter, the driving device (not shown) is driven to hold the table 38 and the exposure device 39 between the holding plates 84A and 84B, thereby fixing the exposure device 39 to the table 38. As described above, the exposure device 39 is fixed to the table 38 by the holding plates 84A and 84B,
The once adjusted distance between the head 40 and the plate cylinder 10 is maintained during the plate making operation, thereby preventing plate making defects. At this time, the head 40 comes close to the plate cylinder 10, so that, as shown in FIG.
-4, a work space is secured, so that workability is improved.

Next, the screw engagement between the thumb screw 93 and the screw hole 38b of the table 38 is released, and the screw engagement between the screw 96 and the screw hole 82a of the pipe 82 is released.
The adjustment tool 85 is removed from the table 38 and the exposure device 39. As described above, by making the adjustment tool 85 detachable, a plurality of printing units 4-
It is possible to adjust the plate making devices 35 of 1 to 4-4. Accordingly, the number of adjustment tools 85 to be managed is reduced along with the cost reduction.

Next, when an exposure start button (not shown) is operated, the control device 6 has already recognized that the plate making operation is ready, so that a signal for starting the plate making operation is sent to the motor 71.
(FIG. 3). When the motor 71 is driven, the ball screw 72 rotates in the forward direction, and the exposure device 39
From the position shown by the two-dot chain line in the direction of arrow D. Origin dog 27 by exposure device origin sensor 76
Is detected, the rotation of the motor 71 is temporarily stopped, and the exposure device 39 is positioned at the origin.

When the exposure device 39 is positioned at the origin,
Since the motor 71 rotates in the reverse direction and the exposure device 39 moves in the direction of the arrow C, the head 40 performs plate making on the plate mounted on the plate cylinder 10. Next, the exposure apparatus 3
When 9 is positioned at the position indicated by the two-dot chain line, the motor 71 is driven in the forward direction again, and the exposure device 39 moves in the direction of arrow D. When the origin dog 27 is detected by the exposure device origin sensor 76, the exposure device 39 is positioned again at the origin.

As described above, the origin dog 27 is connected to the frame 9A.
Side, and align the exposure device origin sensor 76 with the table 38.
, The position of the head 40 in the axial direction of the plate cylinder 10 can be detected with reference to the frame 9A. Therefore, the position of the head 40 can be accurately detected without being affected by the positional accuracy at the operating position of the plate making device 35 and the positional accuracy of the head 40 with respect to the plate making device 35. Thereby, high-precision plate making becomes possible, and printing quality is improved.

Since the plate making apparatus 35 is provided in all of the printing units 4-1 to 4-4, the printing units 4-1 to 4-4
4, the position of the head 40 is detected with reference to the frame 9A. Accordingly, the register accuracy is improved, and the complicated and skillful work of adjusting the position of each plate cylinder 10 by the operator for registering is reduced, and the burden on the operator is greatly reduced. In addition, the preparation time can be greatly reduced, and the productivity is improved.

After the plate making operation is completed, a print start button (not shown) is operated while the plate making device 35 is kept at the operating position. Since the control device 6 has already recognized that it is in a printable state, it starts the printing operation. At this time, as shown in FIG. 2A, the plate making device 35 closes the opening 22 of the printing unit 4B. That is, since the plate making device 35 functions as a safety cover, it is not necessary to provide a safety cover exclusively.

As a result, a safety cover that can be freely opened and closed is not required, so that the structure is simplified. Also, the printing unit 4-
Since the space on the front side of 2 does not become unnecessarily narrowed, the workability during plate replacement and maintenance is improved. Further, based on the detection signals of both the fixed detection sensor 63a and the plate making device attachment / detachment detecting sensors 25A and 25B, the control device 6 controls the plate making and printing to be possible. Done.

In the case of performing plate exchange work and maintenance of rollers and the like, in FIG.
The plate making device 35 is moved in the direction of arrow B from the operating position shown by the solid line to be positioned at the position shown by the two-dot chain line. At this time, the notch 79a of the cam 79 is detected by the detection switch 24, and it is detected that the plate making device 35 is positioned at the non-operation position. On the basis of the detection signal from the detection switch 24, the control device 6 controls the printing press 1 to enable plate exchange work and maintenance work.

Next, when a plate replacement button (not shown) is operated to perform a plate replacement operation, as shown in FIG. 2A, a lever is driven by driving means (not shown). Fifteen
Is positioned at the guide position indicated by the two-dot chain line. next,
The grip of the back side vice device 13 of the plate cylinder 10 is released, and the grip of the grip side plate vise device 12 is released after the plate cylinder 10 makes approximately one clockwise rotation in the figure. As a result, the old version 2
3B is removed from the plate cylinder 10 through the opening 22 of the printing unit 4-2 while being guided by the guide rollers 17.

Next, when the gripping end portion of the new plate 23A supported by the new plate mounting guide members 19 and 20 is inserted into the gripping plate vise device 12, the gripping plate vise device 12 is moved.
Is closed, and the new edition 23A is added. Lever 15
Rotates slightly in the clockwise direction in the figure, and the plate cylinder 10 rotates substantially one turn in the counterclockwise direction with the guide rollers 17 positioned at the plate mounting position indicated by the dashed line. With this, new version 2
3A is inserted into the butt-plate vise device 13 and the butt-plate vise device 13 is closed and the butt-side end is held, so that the new plate 23A is attached to the peripheral surface of the plate cylinder 10. Be attached.

As described above, by detecting with the detection switch 24 that the plate making device 35 is positioned at the non-operating position separated from the plate cylinder 10, the plate replacement operation becomes possible. Therefore, it is possible to prevent the head 40 and the like from being damaged by the discharged old plate 23B and the supplied new plate 23A, and to prevent the surface of the new plate 23A from being damaged.

On the other hand, when performing maintenance on the rollers and the like, maintenance is performed by inserting a tool or the like through the opening 22 opened by positioning the plate making device 35 at the non-operation position. As described above, by detecting that the plate making device 35 is at the inoperative position, the plate replacement operation and the maintenance operation are controlled so that the plate exchange operation and the maintenance operation can be performed, so that the plate exchange operation and the maintenance operation can be reliably performed.

FIGS. 15 (a) and 15 (b) are side views showing a modified example of the adjusting device according to the present invention, with a part cut away. FIG.
In the adjusting tool 185 shown in FIG. 14A, a shaft 97 having a shaft portion 97a and a screw portion 97b formed on the tip side of the shaft portion 97a instead of the differential bolt 90 shown in FIG.
Is used. The shaft portion 97a of the shaft 97 penetrates through the hole of the movable member 87 to which the screw 96 is fixed and held, and the screw portion 97b is screwed and fixed to the hole of the fixed member 86.
A pair of retaining rings 98 such as E-rings fixed to the shaft portion 97a corresponding to both surfaces of the movable member 87 restrict the movable member 87 from moving in the axial direction of the shaft portion 97a.

In the adjusting device 185 thus configured, the shaft 97 moves in the direction to approach or separate from the exposure device 39 by the rotation of the handle 91. Accordingly, the movable member 87 supported by the shaft portion 97a and the screw 9
6 also moves toward or away from the exposure device 39, and fine adjustment of the exposure device 39 for the new plate 23A mounted on the plate cylinder 10 is performed.

In the adjusting tool 285 shown in FIG. 15B, a screw 9 is used instead of the operating bolt 90 shown in FIG.
9a and a shaft portion 99b formed on the tip side of the screw portion 99a.
Is used. The screw portion 99a of the shaft 99 is screwed into the movable member 87 fixedly holding the screw 96, and the shaft portion 99b penetrates through the hole of the fixed member 86 in a loosely fitted state. A pair of retaining rings 98 fixed to the shaft portion 99b corresponding to both surfaces of the fixing member 86 restrict the shaft 99 from moving in the axial direction.

In the adjusting device 285 thus configured, the rotation of the handle 91 causes the shaft 99 to rotate without moving in the axial direction. With the rotation of the screw portion 99a, the movable member 87 and the screw 96 are sent in a direction to approach or separate from the exposure device 39, and fine adjustment of the exposure device 39 to the new plate 23A mounted on the plate cylinder 10 is performed.
These adjusting tools 185 and 285 also have a fixed member 86, a movable member 87, and a shaft 9 similarly to the adjusting tool 85 described above.
7, 99, the number of parts is minimized, the structure is simplified, and the manufacturing cost is reduced.

In this embodiment, the screw holes 38b are provided directly on the table 38. However, a bracket for fixing the table 38 is provided, and the screw holes 38b are provided in the brackets.
b may be provided, and various design changes are possible. Further, although the pipe 82 is provided in the exposure device 39, a screw hole into which the screw 96 is screwed may be provided in the direct exposure device 39.

[0071]

As described above, according to the first aspect of the present invention, since the position of the head with respect to the plate cylinder is adjusted by the adjusting tool, the position of the head with respect to the plate cylinder is adjusted, thereby preventing poor plate making. it can. In addition, since the adjusting tool is detachable from the plate making apparatus, the adjusting tool can be removed from the plate making apparatus after the adjustment is completed, so that the working space of the worker is not narrowed. In addition, since the adjusting tool is not built in the plate making apparatus but is detachable from the plate making apparatus, the size of the plate making apparatus can be reduced. In addition, since the plate making apparatus of a plurality of printing units can be adjusted with one adjusting tool, not only cost is reduced but also the number of adjusting tools to be managed is reduced.

According to the second aspect of the present invention, the head, the position of which has been adjusted with respect to the plate cylinder by the adjusting tool, is fixed, so that the position of the head with respect to the plate cylinder is maintained in an optimum state, and Defects are prevented.

According to the third aspect of the present invention, a work space is secured, so that workability is improved.

According to the fourth to sixth aspects of the present invention, since the adjusting tool is constituted by the fixed member, the movable member and the adjusting screw, the number of parts is minimized, and the structure is simplified and Manufacturing costs are reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing the overall appearance of a printing press according to the present invention.

FIG. 2A is a side view showing a main part of the printing press according to the present invention, partially cut away, and FIG. 2B is a view taken in the direction of the arrow I in FIG.

FIG. 3 is a plan view showing a main part of the printing press according to the present invention.

FIG. 4 is a perspective view schematically showing an external appearance of a main part of the printing press according to the present invention, wherein FIG. 4A shows a state in which an opening of a printing unit is closed by a plate making apparatus, and FIG. Indicates a state where the opening of the printing unit is opened.

FIG. 5 is a perspective view schematically showing a main part of the printing press according to the present invention with a cover and a plate making device removed.

FIG. 6 is a front view of a main part of the printing press according to the present invention.

FIG. 7 (a) is a side view showing a part of a plate making apparatus of a printing press according to the present invention, which is cut away, and FIG.
FIG.

FIG. 8 is a perspective view schematically showing a base unit of a plate making apparatus in the printing press according to the present invention.

FIG. 9 is a plan sectional view of a base unit in the printing press according to the present invention.

10 (a) is a side view of a plate making apparatus for a printing press according to the present invention, FIG. 10 (b) is a view taken in the direction of arrow III in FIG. 10 (a), and FIG. 10 (c) is FIG. 4) is an enlarged view of an IV section in FIG.

FIG. 11 is a perspective view of a guide structure of the exposure apparatus in the printing press according to the present invention, as viewed from the rear side.

FIG. 12 is a perspective view of a guide structure of an exposure device in a printing press according to the present invention, as viewed from the front side.

FIG. 13A is a plan view showing a part of a structure for adjusting a position of an exposure apparatus of a printing press according to the present invention, in which a part thereof is cut away;
FIG. 2B is a side view showing a part of the structure.

FIG. 14 is a perspective view schematically showing a structure for adjusting the position of an exposure device in the printing press according to the present invention.

FIGS. 15A and 15B are side views showing a modified example of the adjusting device according to the present invention, with a part thereof broken away.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Printing machine, 4-1 to 4-4 ... Printing unit, 6 ... Control device, 8-1 to 8-4 ... Work space, 35 ... Plate making device, 3
9 exposure apparatus, 40 head, 85, 185, 285
Adjusting tool, 86: fixed member, 87: movable member, 90: differential screw, 97, 99: shaft.

Claims (6)

[Claims] 1. A printing press provided with a plate making device for making a plate on a plate mounted on a plate cylinder of a printing unit, comprising: a supporting member supported on a frame side of the printing press;
A head that is detachable with respect to the support member and performs plate making on a printing plate mounted on the plate cylinder, and an adjusting tool that adjusts the position of the head with respect to the support member is detachably attached to the plate making device. A printing machine characterized in that a supporting portion for supporting the printer is provided. 2. The printing press according to claim 1, further comprising fixing means for fixing said head to said support member. 3. The printing press according to claim 1, wherein the plate making device is provided in proximity to the printing unit. 4. The printing press according to claim 1, wherein a screw hole is provided on each of the support member side and the head side of the plate making apparatus, and the adjusting tool is screwed into and removed from the screw hole on the support member side. A fixed member that is freely attached, a movable member that is screwed into the screw hole on the head side, is detachably attached, and is movably provided with respect to the fixed member, and is screwed to the fixed member and the movable member. A printing press characterized by comprising a differential screw for adjustment. 5. The printing press according to claim 1, wherein a screw hole is provided on each of the support member side and the head side of the plate making apparatus, and the adjusting tool is screwed into and removed from the screw hole on the support member side. A fixing member which is freely attached, a movable member which is screwed into the screw hole on the head side and is detachably attached and is provided movably with respect to the fixing member, and a movable member which is screwed to the fixing member and is movable forward and backward. A printing machine comprising a screw, wherein the screw and the movable member move integrally. 6. The printing press according to claim 1, wherein a screw hole is provided on each of a support member side and a head side of the plate making apparatus, and the adjusting tool is screwed into and removed from the screw hole on the support member side. A fixing member that is freely attached, a movable member that is screwed into the screw hole on the head side, is detachably attached, and is movably provided with respect to the fixing member, and movement of the fixing member in the axial direction is regulated. And a screw rotatably supported and screwed to the movable member.