JPH03162958A - Printing unit - Google Patents

Abstract

PURPOSE:To make it possible to detachably mount a blanket cylinder and a plate cylinder without undesirably affecting any quality of printing by providing a bearing rotating mechanism which rotates each of eccentric bearings. CONSTITUTION:Upper and lower blanket cylinders 13, 14 and upper and lower plate cylinders 15, 16 are respectively arranged in a vertical direction of a printing paper, and the axes of the upper plate cylinder 15 and the lower plate cylinder 16 are supported through eccentric bearings 17-19, respectively, by a frame 11. Any one of the axes of the upper blanket cylinder 13 and the lower blanket cylinder 14 is securely at its regular position by the frame 11, while the remaining of the axes of the upper and lower blanket cylinder 13 and 14 is movably supported through the eccentric bearings 17-19 by the frame 11. A bearing rotating mechanism 30 is provided so as to rotate each of the eccentric bearings 17-19. In the case of maintaining and inspecting a form plate, web break or the like, the upper blanket cylinder 13 and the upper and lower plate cylinders 15, 16 are moved to detachably mount the plate cylinders 15, 16 and the blanket cylinders 13, 14 on the basis of the lower blanket cylinder 14 fixed at its regular axis position. Therefore, positional repeatability of both the blanket cylinders 13, 14 is ensured, and the stable printing quality is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a printing unit that performs offset rotary double-sided printing, and particularly relates to improvements in the supporting structure of the blank cylinder and plate cylinder.

[Background technology]

Conventionally, in an offset rotary printing press that prints on both sides of printing paper, as is well known, the printing paper is sandwiched between the upper and lower blanket cylinders, and the blanket cylinder, plate cylinder,
A printing unit is used in which the ink roller group and the water roller group are arranged vertically symmetrically or in a similar arrangement.

In such conventional printing units, the positions of the upper and lower plate cylinders, which are associated with the ink form roller group and swimsuit roller group, are fixed, while the positions of the upper and lower blanket cylinders, which do not have any related mechanisms, are movable. It becomes. This allows the blanket cylinder to be moved to perform plate maintenance, replacement, and repairs when cutting paper.

Further, an ink applicator roller that supplies ink to the plate cylinder is supported at one end of a hell-crank-shaped arm whose rotation center is the ink leveling roller. One end of a lever is connected to the other end of this arm via a linear link. An operating lever is rotatably provided on this lever via a shaft, and a piston rod of an air cylinder is connected to this operating lever. At this time, the ink forming roller is attached to and detached from the plate cylinder by driving an air cylinder.
The attaching state of the forming roller is such that the link and the lever are arranged in a straight line, and the attaching state is carried out at the end of the stroke of the air cylinder.

On the other hand, in order to correct the inclination of the plate with respect to the axis of the plate cylinder, one shaft end of the plate cylinder is supported by a frame via an eccentric bunoche, and by rotating this eccentric bunoche, the plate It is equipped with a so-called plate twisting mechanism that can correct the tilt. The plate twisting mechanism and the ink form roller attaching/detaching mechanism are independent mechanisms that have no mutual relationship.

Also, swimwear! The mechanism for attaching and detaching the -1 roller to and from the plate cylinder is constructed in the same manner as the mechanism for attaching and detaching the ink form roller.

Further, the upper and lower plunget cylinders and the upper and lower plate cylinders are connected via a gear interlocking mechanism, and this gear interlocking mechanism is driven by a line shaft connected to a drive source such as a motor. This line shaft is a drive shaft that synchronizes and drives multiple printing units arranged in order to perform multi-color printing.If an abnormality such as a paper cut occurs and the line drive is to be stopped, a brake is applied to this line shaft. It is designed to stop the rotation of each torso by hanging it.

[Problem to be solved by the invention]

In conventional printing units as mentioned above, the upper and lower blanket cylinders move to attach and detach from the fixed upper and lower plate cylinders, which makes it difficult to reproduce the positions of the upper and lower blanket cylinders when they are attached to the plate, resulting in poor print quality. The problem was that it had a negative impact on the

Further, since the body mounting position of the ink forming roller and/or the water forming roller is determined at the stroke end of the air cylinder, each forming roller does not follow the plate twisting motion. Therefore, when a plate twisting operation is performed, the width of contact between each form roller and plate cylinder, the so-called nip width, changes.
Another problem is that the amount of ink and/or water supplied to the printing plate changes, resulting in printed matter with different tones.

Furthermore, during high-speed printing, if the machine needs to be stopped suddenly due to a paper cut or other trouble, if the machine cannot be stopped suddenly, the paper will wrap thickly around the blanket cylinder, causing major damage to the machine.

For this reason, conventionally, a brake is applied to the line shaft to bring it to a sudden stop.

However, since no brake is installed on the plangent cylinder, which has the highest rotational inertia, a large load is placed on the gear interlocking mechanism that transmits power from the line shaft to the blanket cylinder and plate cylinder, making it difficult to protect the machine. The problem is that it is not always effective.

On the other hand, even if a brake is to be installed on the blanket cylinder, the blanket cylinder is movable relative to the frame as described above. For this reason, there was no place to fix the brake, and it was virtually impossible to provide a brake.

A first object of the present invention is to provide a printing unit equipped with a cylinder support mechanism that does not adversely affect printing quality even when the blanket cylinder and plate cylinder are attached and detached.

A second object of the present invention is to prevent the printing quality improvement obtained by achieving the first object from being impaired by the plate twisting operation, so that even if the plate twisting operation is performed, the ink forming roller and/or Another object of the present invention is to provide a printing unit in which there is no change in the nip width between the dampening roller and the plate cylinder.

Furthermore, a third object of the present invention is to facilitate sudden stops and protect the machine during sudden stops, so as to further improve mechanical safety in relation to achieving the first object. The purpose of the present invention is to provide a printing unit that can perform sufficient printing operations.

[Means for Solving the Problems] The present invention provides movable plate cylinders, which were conventionally immovable, while providing movable upper and lower blanket cylinders, both of which were conventionally movable. The first objective is achieved by fixing the upper or lower blanket cylinder and aligning the other blanket cylinder and both the upper and lower plate cylinders based on the fixed blanket cylinder. It is.

Specifically, upper and lower blanket cylinders and upper and lower plate cylinders are arranged vertically in the order of the printing paper as a reference, and the axes of the upper and lower plate cylinders are connected to the frame via eccentric bearings, respectively. (9) The axis of either the upper blanket cylinder or the lower blanket cylinder is supported in a fixed position on the frame, and the axis of the other is movable to the frame via an eccentric bearing. The printing unit is characterized in that it is provided with a bearing rotation mechanism that supports the eccentric bearings and rotates each of the eccentric bearings.

Furthermore, in addition to the structure that fixes the axial center position of one of the blanket cylinders, the present invention enables plate twisting by supporting at least one end of the upper and lower plate cylinders via an eccentric push. In addition, a plurality of ink forming rollers and/or water forming rollers are rotatably supported on an arm eccentrically supported by the ink leveling roller and/or water leveling roller, and the ink forming rollers and/or water forming rollers are rotatably supported. A roller is provided so as to be able to approach and separate from the upper and lower plate cylinders, and an arm rotation mechanism including a pneumatic cylinder for rotationally driving the arm is provided, and an ink forming roller and/or a water roller is provided on the arm. In addition to installing an eccentric cam concentrically with the applicator roller, a cam stop 10 having the same diameter as the bearer provided on the upper and lower plate cylinders is installed concentrically with each plate cylinder on an eccentric pusher that supports each plate cylinder eccentrically. the eccentric cam is brought into contact with the cam stopper by the biasing force of the arm rotation mechanism, and the pneumatic cylinder of the arm rotation mechanism is in the middle of its stroke when the eccentric cam and the cam stopper are in contact with each other. As a result, the ink forming roller and/or water forming roller can be moved in accordance with the plate twisting operation, and the second
It aims to achieve the purpose of

Furthermore, in addition to the structure for fixing the axial center position of one of the blanket cylinders, the present invention provides a brake around the axis of the fixed blanket cylinder, and the upper and lower plangents are driven through a gear interlocking mechanism. The third objective is achieved by making it possible to stop the cylinder and the upper and lower plate cylinders with a blanket cylinder having large rotational inertia.

[Effect]

In the present invention configured as described above, in order to attach and detach the plate cylinder and the blanket cylinder for maintenance inspection of the plate, paper cut, etc., use the other blanket cylinder with the fixed axis position as a reference. Move the cylinder and the upper and lower plate cylinders. This ensures reproducibility of the positions of both blanket cylinders and provides stable printing quality.

Furthermore, if the plate is installed at an angle with respect to the plate cylinder, this inclination can be corrected by rotating the eccentric pusher that supports the plate cylinder. This plate correction operation, that is, the plate twisting operation, displaces the center of the plate cylinder, and the nip width between the plate cylinder and the ink form roller and/or the water form roller tends to change. However, in the present invention, as the eccentric push rotates, the cam stopper attached to the eccentric push is also displaced. Therefore, the eccentric cam that is in contact with the cam stopper is also displaced following the cam stopper, and the arm on which the eccentric cam is supported is also displaced.

Therefore, the ink applicator roller and/or water applicator roller supported by the arm are also displaced, thereby preventing changes in the nip width and maintaining an appropriate nip width. At this time, since the pneumatic cylinder that rotates the arm is set in the middle of its stroke, the above-described movement of the eccentric cam to follow the cam stopper is performed quickly and smoothly.

Furthermore, in the event of an abnormality such as a paper cut, it is necessary to suddenly stop the drive system of the blanket cylinder, plate cylinder, etc., but in the present invention, the brake provided on the blanket cylinder is activated to perform the sudden stop. This sudden stop by the brake is carried out by the branguet 1/cylinder with large rotational inertia, so it is carried out smoothly and does not overload the device.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a side view of the roller structure of the printing unit for a double-sided offset rotary press according to the present embodiment, viewed from the same direction with the operation side frame removed.

In the same figure, the printing unit 10 is equipped with a frame 13 11, and this frame 11 includes a "ni blanket cylinder 13, a lower blanket cylinder 14, an upper plate" in the vertical direction with respect to the printing paper 12 running in the horizontal direction. The cylinder 15 and the lower plate cylinder 16 are arranged in this order.

The lower blanket cylinder 14 has its axis O fixed to the frame 11. On the other hand, for cylinder relief, the axis P1 of the upper blanket cylinder 13 and the axis Q1 of the second printing cylinder l5.
The positions of the axis R1 and the axis R1 of the lower plate cylinder 16 are respectively movable with respect to the frame 1l.

That is, the upper blanket cylinder l3 has an eccentric bearing l having an axis P2 at a position eccentric from the axis P by a predetermined distance.
It is eccentrically supported via 7.

Further, the upper plate cylinder 15 is pivotally supported via an eccentric bearing 8 having an axis Q2 at a position offset by a predetermined distance with respect to the axis Q1. Further, the lower plate cylinder 16 is equipped with an eccentric bearing l9 having an axis R2 at a position offset by a predetermined distance with respect to the axis R.
It is pivoted through. On the other hand, the lower blanket cylinder 14
For example, it is supported via a bearing 20 that is concentric with the axis O.

14 Each of the eccentric bearings 17 to 19 has an operating protrusion 21.
, 22.23 are fixed. Upper planke soto body 13
The operating protrusions 21 and 22 fixed to the eccentric bearing 1718 of the upper plate cylinder 15 are connected via a connecting link 31 as a cylinder interlocking mechanism which will be described in detail later, and the operating protrusion 21 is
It is rotatably driven via an operating link 32, which will also be described in detail later, so that the barrel can be released. In addition, the lower plate cylinder 16
The actuating protrusion 23 fixed to the eccentric bearing l9 is rotatably driven via the actuating link 33 so that it can be released from the barrel. These connecting links 31, operating links 32, 3
3. Eccentric bearing 1 including a drive source (not shown) to be described later
A bearing rotation mechanism 30 for rotationally driving the components 7 to 19 is provided.

The upper and lower plate cylinders 15 and 16 are provided with an ink supply device 70 and a water supply device 90, each having a substantially symmetrical or identical configuration.
are provided so that each plate cylinder 15, 16 is supplied with ink and water.

The ink supply device 70 includes an ink supply section 7ll5 and an ink roller group 72. The ink roller group 72 includes an ink dispenser roller 73 that dispenses ink from the ink supply section 7l, an ink transfer roller 74, a plurality of ink mixing rollers 75, and these ink mixing rollers 75.
A plurality of ink leveling rollers 76 are interposed between the ink leveling rollers 76 and driven in the axial direction, and these ink leveling rollers 76
Two ink leveling rollers 76A, 76B on the latter stage side
The first, second, and third ink application &-1 rollers 77. which are in contact with any one of the plate cylinders 15.16 and the plate cylinders 15.16.
It has been constructed from 78.79.

The water supply device 90 includes a water boat 9l and a water roller group 92. The water roller group 92 includes a water dispenser roller 93 that draws water out of the water boat 91, a rider roller 94 that smoothes the water on the water dispenser roller 93, a water transfer roller 95 that is in contact with the water dispenser roller 93, and a water transfer roller 95 that is in contact with the water dispenser roller 93. Leveling roller 9 that is brought into contact with water transfer roller 95 and driven in the axial direction
6 and a dampening roller 97 which is in contact with the leveling roller 96 and also with the plate cylinder 15.16.

The ink roller group 72 and the water roller group 92 are composed of an ink dispenser roller 73 and a water dispenser roller 9, as in the conventional device.
All but 3 can be separated from each other. Since the basic structure of the separation mechanism for each roller is the same as the conventional mechanism using an eccentric sleeve and an operating link, the mechanism of each ink form roller 77 to 79, which is one of the features of the present invention, is I will only explain about.

Said first, second and third ink deposit & J rollers 7778.
79 is rotatably supported at one end of the first, second, and third (7) 7-1.101, 102, and 103 each formed in a bell crank shape. First and second arms 10
Eccentric sleeves 105 and 10 are mounted on a bearing 104 that rotatably and axially displaceably supports one of the ink leveling rollers 76A on the rear stage side, respectively.
6. In addition, the third arm 103
The intermediate portion of the ink leveling roller 76B is supported via an eccentric sleeve 108 by a bearing 107 that rotatably and axially displaceably supports the other ink leveling roller 76B.

The first, second and third arms 101, 102, 103
The other end is a pneumatic cylinder 111121.131, respectively.
It is designed to be rotationally driven by an arm rotation mechanism 110120.130 equipped with.

FIG. 2 shows a cross-sectional view taken along line 1 and 1 in FIG.
．． A partial cross-sectional view of 16 support structures is shown.

In the figure, the lower blanket cylinder 14 is rotatably supported by the frame 11 via the non-eccentric bearing 20 as described above, and the upper blanket cylinder 13 and the upper and lower plate cylinders 15 .
16 are supported by the frame 11 via eccentric bearings 17, 18, and 19, respectively. At both ends of each of the upper and lower blanket cylinders 13l4 and the upper and lower plate cylinders 15.16, hairers 24, 25, 26, which have the same diameter as each cylinder, are used to stabilize the contact state with each other. .27 is fixed.

18 Each of the cylinders 13 to 16 is connected to a motor as a rotational drive source (not shown) via a gear interlocking mechanism 140 provided on the right side in FIG. 2, and is driven to rotate.

The gear interlocking mechanism 140 includes a plurality of gears that are sequentially meshed, that is, a bevel gear 1 fixed to a line shaft I 141.
42, a bevel gear 144 fixed to one end of a rotating shaft 143 rotatable to the frame 1l, a spur gear 145 fixed to the rotating shaft 143, a spur gear 146 fixed to one end of the central shaft 16A of the lower plate cylinder 16, Central axis 14 of lower blanket cylinder 14
A spur gear 147 fixed to one end of A, this spur gear 147
a spur gear 148 which is key-fixed to the spur gear 148, an internal gear 149 meshed with the spur gear 148 and rotatably supported by the frame l1, a helical gear 151 fixed to the outer periphery of the internal gear 149, and an upper blanket. Central axis 1 of body 13
It consists of a helical gear 152 fixed to one end of the cylinder 3A, a spur gear 153, and a spur gear 154 fixed to the central axis 15A of the upper plate cylinder 15.

1 9 At the other end of the central axis 14A of the lower blanket cylinder 14,
The movable side of the brake 160 is fixed, and this brake 16
The fixed side of 0 is an oil reservoir 165 fixed to the frame 11.
Fixed. At this time, as the brake 160,
Any type may be used, but for example, one may be used in which the brake plate is driven by compressed air to release the brake, and when the compressed air is removed, the brake is applied by spring force.

As an example of the upper and lower plate cylinders 15, 16, on the outer periphery of the eccentric bearings 18, 19 on the left side in the figure, eccentric pushers 171, 172 which are further eccentric to each eccentric bearing l819 are provided, and are supported by the frame 1l. There is.

Operating rings 173, 174 are fixed to the ends of these eccentric pushers 171, 172, respectively, and by rotating these operating rings 173, 174 with a motor drive mechanism (not shown), each plate cylinder 15, 16 is rotated. One end can be twisted to perform what is called a plate twist.

3 and 4 show the detailed structure of the bearing rotation mechanism 302 0 . At this time, FIG. 3 is a cross-sectional view taken along the line ■--■ in FIG. 2, and FIG. 4 is a sectional view taken along the line IV--IV in FIG. 2.

In FIG. 3, the operating protrusion 2 of 13 examples of the upper blanket cylinder is shown.
A connecting link 3l connecting L and the operating protrusion 22 on the upper plate cylinder 15 side has one end rotatably supported by the pin 34 of the operating protrusion 21 and the other end extended to the pin 35 of the operating protrusion 22. It is supported so that its length can be adjusted via a length adjustment mechanism 36. This length adjustment mechanism 36 is fitted with a hollow screw 37 which is placed over the connecting link 3l and has one end inserted through the pin 35.
A double nant 38 is screwed onto the connecting link 31 in order to change the connection position of the hollow screw 37 to the connecting link 31, and a double nant 38 is screwed onto the end of the hollow screw 37 protruding from the pin 35. At the same time, the hollow screw 37 is fixed to the pin 35 via a spacer 39 with a double nut 41, and the length can be adjusted by changing the screwing position of the double nut 38 to the connecting link 31. It looks like this.

21 The operating link 32, which has one end connected to the operating protrusion 21 on the upper blanket cylinder 13 side, has a turn handle 42 in the middle.
The base of the operating link 32 is supported by a support block 44 via an eccentric worm gear 43, allowing for fine adjustment of the length. The eccentric worm gear 43 is supported concentrically by the support bronck 44, and eccentrically connected to the operating link 32 via an eccentric portion 43A. Therefore,
By rotating the eccentric arm gear 43 via the worm 45 supported by the support block 44, the eccentric part 43A is displaced and the connecting part of the operating link 32 is displaced, so that the length can be finely adjusted. It has become.

The support block 44 is fixed to one end of a barrel release shaft 46 rotatably supported by the frame 11.

On the other hand, the operating link 33 whose one end is connected to the operating protrusion 23 on the lower plate cylinder 16 side is provided with a length adjustment mechanism 22 47 similar to that provided on the connecting link 31 at one end, and the other end is , is rotatably connected to the tip of the support block cock 48. This support block 48 is
It is fixed to one end of a barrel release shaft 49 rotatably supported by the frame l1.

FIG. 4 shows the drive system of the double barrel relief shafts 46 and 49,
This drive system is arranged outside the frame 1l.

In the same figure, sector gears 51 and 52 are fixed to each barrel relief shaft 46 and 49, and these sector gears 5
1 52 are engaged with racks 53 and 54, respectively. These racks 5354 each have a frame l
It is guided and supported by rack guides 55.56 fixed to the rack guides 55.
It is fixed to the tip of the piston rond 61 and 62 of 58.

Further, a stopper 6 is provided at the end of the body release shaft 46.49.
3.64 are fixed, and these stone bars 63
．． Adjustment bolts 65 and 66 are provided protruding from one example of 64, respectively. The tips of these adjusting bolts 65 and 66 are made to come into contact with a stop shaft 67 protruding from the frame l1, and the two stoppers 63
The counterclockwise rotational position of the lower spring 1 and collar 64 is regulated. Adjustment bolt for this strob shaft 67}65
．． The abutting state of 66 is the waist-worn state illustrated in FIG.

5 and 6 show the structure of the lower plate cylinder 16 and the first to third inking rollers 77 to 79 related to the lower plate cylinder l6, and FIG. FIG. 2 is a sectional view taken approximately along the line Vl-Vl of FIG.

In FIGS. 5 and 6, both ends of the lower plate cylinder l6 are supported by the frame 11 via eccentric bearings 19, and on the other hand, the eccentric bearing l9 on the left side in FIG.
72 is fitted. This eccentric bunsch 172 has
A cam stopper 181 having the same diameter as the bearer 27 of the lower plate cylinder 16 is fixed concentrically with the hairer 27. This cam stop collar 181 is also provided on the right side. However, since there is no eccentric bracket 172 on the right side, the right side is fixed to the eccentric bearing l9.

2 4 On the other hand, the first, second and third arms 101, 102,
103 has protruding shafts 182, 183, and 184, respectively, concentric with the first, second, and third inking rollers 77, 78, and 79, which are rotatably supported at one end of the arm 101, 102, and 103, respectively. Fixed, these protruding shafts 1
First, second, and third eccentric cams 185, 186, and 18.7 are provided at 82, 183, and 184, respectively. These eccentric cams 185, 186, 187 have slot grooves 185A, 186A, 187A, respectively, and by tightening or loosening these slot grooves 185A, 186A, 187A with bolts 191, 192, 193, each eccentric Each protruding shaft 1B2 of the cams 185, 186, 187,
Rotation positions can be adjusted to 183 and 184.

The first, second and third eccentric cams 185, 186, 18
7 is a pneumatic cylinder 111 of the arm rotation mechanism 110.120130 connected via the protruding shafts 182.1+33, l84 and arms 101, 102, 103, respectively.
, 121.131, 25 is brought into contact with the cam stopper 181 by the biasing force. Moreover, the connection between each pneumatic cylinder 111.121131 and each arm 101, 102, 103 is the piston l cod 112 of each pneumatic cylinder 111, 121, 131,
Clevis 1 provided at the tips of 122 and 132, respectively
13, 123, 133 are each arm 101, 102, 10
This is done by connecting a bottle to the other end of 3.

When the cam stopper 181 is in contact with each of the eccentric cams 185 to 187, each of the pneumatic cylinders 111, 12
1,131 each piston rod l12 122.13
2 is set to be in the middle of the stroke. As a result, even if the eccentric pusher 172 of the lower plate cylinder 16 is rotated and the cam stopper 181 is moved eccentrically due to plate twisting, each eccentric cam 185 to 187 will be moved by the biasing force of each pneumatic cylinder 111, 121, 131. It will follow and move. Therefore, the contact state between the lower plate cylinder 16 and each of the ink forming rollers 77 to 79, that is, the dip width is maintained appropriately.

26 Also, regarding the displacement of each eccentric cam 185 to 187,
Each arm 101-103 has each eccentric cam 105-107.
The non-eccentric inner peripheral surface S. , S2, and S3, the widths of the ink forming rollers 77 to 79 and the ink leveling rollers 76A and 76B do not change.

Flange members 194, 195, 196 are fixed to the tips of the protruding shafts 1B2, 183, 184, respectively. These tailed members 194195.196 are connected to guide pieces 197.19 fixed to the frame 11, respectively.
8,199, each arm 101,102
, 103 rotate, each ink forming roller 77, 78 .
79 is now supported stably.

The above-described mechanism for preventing changes in the nip width of each of the ink forming rollers 77 to 79 is provided not only on the upper plate cylinder l5 side but also on the water forming rollers 97 of the upper and lower water supply devices 90.

In FIG. 5, reference numeral 201 denotes a doctor 20 for removing excess ink from the surface of the ink leveling roller 27 roller 76B.
This is a support stand that supports 2.

Next, the operation of this embodiment will be explained.

To print, as shown in FIG.
Each blank cylinder 1 1314, plate cylinder 15
, 16, the ink roller 72 and the water roller group 92 are brought into contact with each other in the same manner as in a normal printing machine.

If a problem such as paper breakage occurs during printing, the air drive source and arm rotation mechanism 110 (not shown)
120 and 130, and immediately each ink roller group 7
2 and each roller 73 to 79 of the water roller group 92, and 93 to 9
7 in the direction away from each other, and then the bearing rotating mechanism 30 is driven to move the upper blanket cylinder 13 and the upper and lower plate cylinders 15, 16 in the direction away from the lower blanket cylinder 14.

The arm rotation mechanisms 110, 120, 130 are driven by:
This is done by supplying air to each pneumatic cylinder 111, 121, 131 in the direction in which the piston rods 112, 122, 13228 are pulled in.

When each piston rod 112, 122, 132 is driven in the retraction direction, the first and second arms 101, 102
is rotated counterclockwise, and the third arm 103 is rotated clockwise. These rotations are caused by the ink leveling roller 7.
Eccentric sleeve 105,1 provided on 6A bearing 104
06 and an eccentric sleeve 108 provided on the bearing 107 of the ink leveling roller 76B. As a result, each ink forming roller 77 to 79 is connected to each eccentric sleeve 1.
05 106 Due to the eccentric action of 10B, the lower plate cylinder 1
Movement away from 6 is accomplished.

The bearing rotation mechanism 30 is driven by supplying air in the direction in which the piston rod 61 advances toward the upper pneumatic cylinder 57 in FIG. be exposed. When the piston rond 6162 is driven in the advancing direction and the retracting direction, as shown in FIG.
9 and 56, the sector gears 52 are respectively rotated clockwise. These rotations are transmitted to the support blocks 44, 48 via the barrel relief shafts 4649, respectively. Therefore,
The support bronck 44.48 is rotated in the same direction as the barrel relief shaft 46.49. This causes the eccentric bearing l7 of the upper blanket cylinder 13 to move counterclockwise via the upper operating link 32, and the eccentric bearing l7 of the upper plate cylinder 15 to move counterclockwise via the connecting link 31.
8 is rotated in the direction 81, and the upper plank cylinder 13
and the upper plate cylinder l5 are moved in a direction away from the lower planket cylinder l4 and the upper blanket cylinder 13, respectively. At this time, the eccentric bearing 18 of the upper plate cylinder 15 has an eccentricity approximately twice that of the eccentric bearing 17 of the upper plate cylinder 1 and cylinder l3, and despite the movement G of the upper plate cylinder 13, the upper plate cylinder 15 is sufficiently spaced from the upper blanket cylinder 13.

Also, the eccentric bearing 19 of the lower plate cylinder l6 is rotated counterclockwise via the lower operating link 33, and the lower blanket cylinder l6 is rotated counterclockwise.
3, the lower plate cylinder 16 is moved in a direction away from the lower plate cylinder 16.

30 Note that the movement of each of the rollers 73 to 79, 93 to 97 and each of the cylinders 13 to 17 described above must be performed by each of the rollers 73 to 79,
An interlock circuit is incorporated in the drive air circuit (not shown) so that the movement of cylinder 97 is performed prior to the movement of each cylinder 13-17.

At the same time as the driving of the horizontal shaft bearing rotating machine 30 is started, the rotation of the rotational drive source (not shown) of the line shafts 1 and 141 that drive the respective cylinders 13 to 16 via the gear interlocking mechanism 140 is stopped. , and the central axis 14 of the lower blanket cylinder l4
The brake 160 attached to A is activated, and each cylinder l3
~16 rotations are abruptly stopped.

On the other hand, when attaching the body, movement in the opposite direction to the above-mentioned movement in the separating direction is performed via the arm rotation mechanisms 110, 120, 130 and the bearing rotation mechanism 30. 15.16.

When performing the above-mentioned bodice attachment operation, the upper and lower bodice 15 are
．． 16 is not used as a standard, the plate cylinders 15 and 16 and the blanket cylinder 3 l 13.14 do not have poor parallelism due to plate twisting, and the blanket cylinder 3 l 13.14 does not rub against each other. Injury is done.

In this embodiment, since the upper and lower plate cylinders 15 and 16 are movable, the same operations as described above can be performed not only during an emergency stop due to a trouble as described above, but also during a normal stop such as paper splicing or inspection. The rollers 73-79, 93-97 are moved.

Next, correction of the inclination of the plates placed on the upper and lower plate cylinders 15 and 16, a so-called plate twisting operation, will be explained using the lower plate cylinder 16 as an example.

When the plate of the lower plate cylinder l6 is tilted, as shown in FIG. 2, a rotary drive source such as a motor (not shown) is driven to rotate the actuating ring 174. As a result, the lower plate cylinder 16
An eccentric pusher 172 provided at one end of the lower plate cylinder l6 is rotated to change the axial position of the lower plate cylinder l6 at one end, thereby twisting the plate.

Since the position of the lower plate cylinder 16 changes due to the plate twisting operation, the width of each inking roller 77 to 79 and 3 2 tends to change. However, along with the eccentric push 172, the cam stopper 181 is also displaced by the same amount as the lower plate cylinder 16, and the arm rotation mechanisms 110, 120 130
Since the pneumatic cylinders 111, 121, and 131 are not at the stroke end, the eccentric cams 185 at the shaft ends of the ink forming rollers 77 to 79 follow the movement of the cam stopper 181.
~187, and no change in nip width occurs.

Note that the initial positions of the camstone bar 181 and the eccentric cams 181 to 187 are set by changing the fixed positions of the eccentric cams 181 to 187 with respect to the respective protruding shafts 182 to 183.

According to this embodiment as described above, there are the following effects.

That is, in this embodiment, the axial center position of the lower plankent cylinder HFII4 is fixed, and the upper blanket cylinder 13, upper and lower plate cylinders 15 and 16 are attached and detached using this lower plankent cylinder l4 as a reference. , it is possible to ensure the reproducibility of the torso position when wearing the torso. Therefore, stable print quality can be obtained.

In addition, when attaching and detaching each of the cylinders 13, 133 5, 16, the connecting link 31 and operating links 32, 33 that operate each eccentric bearing 17 to 19 are connected to a length adjustment mechanism 36, a turnbuckle 42, and an eccentric worm gear 42, respectively. and a length adjustment mechanism 47, the trunks 13, 15, 16 can be attached and detached accurately.

Furthermore, since the upper blanket cylinder 13 and the upper plate cylinder 15 are operated simultaneously via the connecting link 31 as a cylinder interlocking mechanism, the drive system for the upper eccentric bearings 17 and 18 can be simplified, and the movement thereof can be simplified. can be done smoothly.

Further, since the ink forming rollers 77 to 79 can follow the movement of the plate cylinders 15 and 16 during the plate twisting operation, there is no change in the nip width, the supply of ink to the plate surface is stable, and the printing color tone can be stabilized. At this time, the ink leveling rollers 76A, 76
Arm 1 that supports B and each ink forming roller 77 to 79
The rotation of 01-103 is caused by the ink leveling rollers 76A, 76.
Since it is concentric with the axis of B, the ink leveling roller 7
There is no change in the width of the 34 dips between 6A, 76B and each of the ink forming rollers 77 to 79.

Furthermore, by fixing the lower Plankenot trunk 14,
Blankanoto cylinders 13 and 14 with the largest rotational inertia
On the other hand, it is possible to provide the brake 160 directly on the shaft 14A of the blanket cylinder 14 on the upstream side (drive side) of the rotation, which makes it possible to quickly stop the cylinders 13 to 17 when the cylinder is released, and to improve the transmission system. The impact can be made extremely small.

Therefore, the machine can be reliably protected in the event of a sudden stop.

In addition, by being able to perform this sudden stop smoothly, it is possible to minimize the wrapping of the cut paper around the upper and lower blanket cylinders 13 and 14, causing the paper to wrap thickly and destroy each blanket cylinder 13 and 14. This can prevent major accidents like this from happening.

Note that the present invention is not limited to the above embodiments,
Improvements and changes within the scope of achieving the objectives of the present invention are included in the present invention.

For example, in the embodiment described above, the blanket cylinder 13.
Although the lower blanket cylinder 14 of the 14 is fixed, in practice, the upper blanket cylinder 133 5 side may be fixed. Bye.

Further, in the above embodiment, the links 3] to 33 and the pneumatic cylinder 57 serve as the bearing rotation mechanism 30 for each eccentric bearing 17 to 19.
．． 58, etc., but the present invention is not limited to this, and other mechanisms such as those using a motor and a gear train may be used.

Furthermore, in the embodiment, each of the ink forming rollers 77 to 79
Although the cam stomper 181 and the eccentric cams 185 to 187 are installed in both the water application roller 97, either one may be provided.

[Effects of the Invention] According to the present invention as described above, since the axial center position of one blanket cylinder is fixed, the reproducibility of the cylinder position during cylinder mounting can be ensured, and printing quality can be stabilized. There is an effect that it can be done.

In addition, a cam stopper with the same diameter and concentricity as the plate cylinder bearer is provided at the eccentric push for twisting the plate, and an arm supporting the ink and/or water forming roller is provided to follow this cam stopper. Even by twisting, it is possible to achieve the effect of not changing the nip width.

Furthermore, since a brake is provided around the axis of the blanket cylinder whose axis position is fixed, each cylinder can be stopped suddenly while protecting the transmission system.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention. Figure 1 is a side view showing the roller structure of the printing unit, and Figure 2 is a side view of the upper and lower blanket cylinders and plate cylinders along line 1 and 1 in Figure 1. 3 is a sectional view taken along the approximate line 1-1 in FIG. 2, FIG. 4 is a view along the IV-TV line in FIG. FIG. 6 is an enlarged view of the lower ink forming roller portion, and is a cross-sectional view along approximately V+-Vt cotton in FIG. 5. 10...Printing unit, ll...Frame, 12.
...3 7 printing paper, 13...upper blanket cylinder, l4...lower blanket cylinder, 15...upper plate cylinder, 16...lower plate cylinder,
171B, 19... Eccentric bearing, 24, 25, 26.2
7... Bearer, 30... Bearing rotation mechanism, 31...
Connection link as barrel interlocking mechanism, 32.33... Operating link, 70... Ink supply device, 76.76A
76B... Ink leveling roller, 77, 78.79...
・Ink coloring number a-ra, 90...Water supply device, 97・
...Swimsuit number Norola, 1 0 1, 1 0 2,
1 0 3=・7-m, 11012α, 130... Arm rotation mechanism, 111 121.131... Pneumatic cylinder, 140... Gear interlocking mechanism, 141... Line shaft, 160... Brake, 171,172・
...Eccentric push, 181...Cam stopper, 185
．． 186,187...Eccentric cam.

Claims (5)

[Claims] (1) Upper and lower blanket cylinders and upper and lower plate cylinders are arranged in the vertical direction with the printing paper as a reference, and the axes of the upper and lower plate cylinders can be moved to the frame via eccentric bearings, respectively. and supporting the axis of either the upper blanket cylinder or the lower blanket cylinder in a fixed position on the frame, and movably supporting the axis of the other on the frame via an eccentric bearing, The printing unit further includes a bearing rotation mechanism for rotationally driving each of the eccentric bearings. (2) In claim 1, cylinder interlocking is provided in which, of the upper and lower blanket cylinders, a blanket cylinder whose axial center position is movable and a plate cylinder on the blanket cylinder side are operated synchronously via a link. A printing unit characterized by being equipped with a mechanism. (3) Upper and lower blanket cylinders and upper and lower plate cylinders are arranged vertically in the order of the printing paper as a reference, and the axes of the upper and lower plate cylinders can be moved to the frame via eccentric bearings, respectively. and supporting the axis of either the upper blanket cylinder or the lower blanket cylinder in a fixed position on the frame, and movably supporting the axis of the other on the frame via an eccentric bearing, Furthermore, a bearing rotation mechanism for rotationally driving each of the eccentric bearings is provided, and at least one end of each of the upper plate cylinder and the lower plate cylinder is supported via an eccentric bush that is further eccentric with respect to the eccentric bearing. Further, a plurality of ink applicator rollers and/or water applicator rollers which can be brought into and out of contact with the upper and lower plate cylinders, respectively, are rotatably supported via an arm, and the arm is connected to the ink applicator roller. A rotating arm that includes a pneumatic cylinder that is eccentrically supported by an ink leveling roller and/or a water leveling roller that is movable toward and away from the forming roller and/or the water forming roller, and that rotationally drives the arm. A printing unit characterized by being equipped with a mechanism. (4) In claim 2, an eccentric cam is attached to the arm concentrically with the ink applicator roller and/or the water applicator roller, and a cam stopper having the same diameter as the bearer provided on the upper plate cylinder and the lower plate cylinder, respectively. , the eccentric cam is fixed concentrically to the eccentric bushing that eccentrically supports each plate cylinder, the eccentric cam is brought into contact with the cam stopper by the biasing force of the arm rotation mechanism, and the eccentric cam and the cam stopper are A printing unit characterized in that, in the contact state, the pneumatic cylinder of the arm rotation mechanism is in the middle of a stroke. (5) Upper and lower blanket cylinders and upper and lower plate cylinders are arranged in the vertical direction with the printing paper as a reference, and the axes of the upper and lower plate cylinders can be moved to the frame via eccentric bearings, respectively. and supporting the axis of either the upper blanket cylinder or the lower blanket cylinder in a fixed position on the frame, and movably supporting the axis of the other on the frame via an eccentric bearing, Further, a bearing rotation mechanism for rotationally driving each of the eccentric bearings is provided, and the upper plate cylinder, the upper blanket cylinder, the lower blanket cylinder, and the lower plate cylinder are provided so as to be drivable via a gear interlocking mechanism, and the A printing unit characterized in that a brake is provided around the axis of the lower blanket cylinder.