JPH08290544A - Offset printer - Google Patents

Abstract

PURPOSE: To enable a user to print in a varying printing size by solving problems with the support structure of a plate cylinder or a blanket cylinder or the assembly of a peripheral mechanism of a printing cylinder, and mounting a plate cylinder of a different diameter in such a manner that the cylinder can be replaced together with the peripheral mechanism of the printing cylinder. CONSTITUTION: A main system unit 11 provided with an ink supply source, a moistening device and a drive shaft, and a printing cylinder unit 15 mounted on the main system unit 11 in a freely detachable manner, with attached cylinders such as plate cylinders 47, 51 and a blanket cylinder are constituted separately. The peripheral mechanisms of a printing cylinder such as the vertical printing register adjustment mechanism of the plate cylinder and a cylinder detachment mechanism, and drive devices thereof 123, 143, 159 are mounted on the printing cylinder unit 15 in such a state that these mechanisms and drive devices are completely separated from the main system unit 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an offset printing machine, and more particularly to a unit type offset printing machine.

[0002]

2. Description of the Related Art As one of offset printing machines, a plate cylinder,
Various bodies such as a blanket cylinder and an impression cylinder, an ink supply device and a dampening device composed of a plurality of rollers, a drive shaft and a drive gear train for rotationally driving the body were assembled into one machine. A unit type is known.

In color offset printing, four printing units are provided, the drive shafts of the respective printing units are drivingly connected to each other, and they are unified as a main drive shaft, and the drive shaft is rotated by a common drive unit. It has been conventionally practiced to drive and mutually operate each printing unit in synchronization with each other.

[0004]

However, in the conventional offset printing machine, regardless of the type of the offset printing machine including the unit type as described above, a plate cylinder and a blanket cylinder having different diameters can be provided in one printing machine. It is impossible to replace and mount them due to their support structure, and the print size is fixed for each printing machine.

Further, the offset printing machine has a vertical printing register adjusting mechanism for the plate cylinder for adjusting the printing register in the vertical direction (rotational direction) or the horizontal direction (axial direction), and a printing cylinder peripheral mechanism such as a cylinder attaching / detaching mechanism. Since these printing cylinder peripheral mechanisms and the driving devices for these printing cylinder peripheral mechanisms are fixedly assembled to the machine body, this also makes it possible to replace and install plate cylinders and blanket cylinders of different diameters in one printing machine. It is impossible, and the print size must be fixed for each printing machine.

The present invention has been made by paying attention to the above-mentioned problems, and solves the problems of the support structure of the plate cylinder and the blanket cylinder and the problems of the assembly of the printing cylinder peripheral mechanism,
It is an object of the present invention to provide an offset printing machine that allows printing cylinders having different diameters and the like to be interchangeably mounted together with a printing cylinder peripheral mechanism so that printing of different printing sizes can be performed by one printing machine. .

[0007]

In order to achieve the above-mentioned object, an offset printing machine according to a first aspect of the present invention comprises a machine unit having an ink supply device, a dampening device and a drive shaft, a plate cylinder and a blanket cylinder. And a printing cylinder unit that is detachably mounted on the printing cylinder unit mounting portion of the main unit, and is connected to the drive shaft in a driving connection with the printing cylinder unit mounting portion of the main unit. Drive side gears are disposed, and the printing cylinder unit is provided with driven side gears that are drivingly connected to the body, and the driving side gears are installed by mounting the printing cylinder unit in the printing cylinder unit mounting portion. And the driven-side gear are in meshing engagement with each other, and the printing cylinder unit includes a printing cylinder such as a vertical printing register adjusting mechanism and a cylinder attaching / detaching mechanism for adjusting the printing register in the moving direction of the printing paper. It is characterized in that it is mounted in a state where the sides mechanisms and their drive is disconnected from the handset unit.

An offset printing machine according to a second aspect is the offset printing machine according to the first aspect, wherein the printing cylinder unit is provided with two upper and lower plate cylinders and a blanket cylinder, and the vertical printing register adjusting mechanism is a vertical print register adjusting mechanism. A common upper and lower rotation phase adjustment unit that simultaneously adjusts the rotation phases of two plate cylinders, and an upper plate cylinder rotation phase adjustment unit and a lower plate cylinder rotation phase adjustment unit that individually perform the rotation phases of the upper and lower plate cylinders. And each of the rotary phase adjusting sections, an actuator for driving each of the rotary phase adjusting sections, and a transmission mechanism for drivingly connecting the actuator and each of the rotary phase adjusting sections are mounted on the printing cylinder unit. It is characterized by that.

According to a third aspect of the present invention, there is provided an offset printing machine according to the first or second aspect, wherein the cylinder attaching / detaching mechanism includes a lever for rotationally displacing eccentric bearing portions on both sides of the blanket cylinder, and an actuator. , A transmission mechanism for drivingly connecting the lever and the actuator, all of which are mounted on the printing cylinder unit.

An offset printing press according to claim 4 is the offset printing press according to any one of claims 1 to 3, wherein
As the printing cylinder peripheral mechanism, there is a lateral printing register adjusting mechanism for matching a printing register in a direction orthogonal to the moving direction of the printing paper, and the lateral printing register adjusting mechanism is connected to a bearing box of the plate cylinder and rotates. A feed screw for moving the plate cylinder in the axial direction, an actuator, and a transmission mechanism for drivingly connecting the feed screw and the actuator, all of which are mounted on the printing cylinder unit. The offset printing machine according to claim 1.

According to a fifth aspect of the present invention, there is provided an offset printing machine according to any one of the first to fourth aspects, wherein the printing cylinder peripheral mechanism includes a plate cylinder twist adjusting mechanism for adjusting a horizontal support posture of the plate cylinder. However, the plate cylinder twist adjustment mechanism is
A lever for rotationally displacing an eccentric bearing portion on one side of the plate cylinder, an actuator, and a transmission mechanism for drivingly connecting the lever and the actuator, all of which are mounted on the printing cylinder unit. Is characterized by.

An offset printing press according to claim 6 is the offset printing press according to any one of claims 1 to 5, wherein
As the printing cylinder peripheral mechanism, there is provided a single driving mechanism for independently driving a body provided in the printing cylinder unit such as a plate cylinder and a blanket cylinder. The single driving mechanism is provided on an electric motor and a shaft portion of the body. And a rotation mechanism for detecting the rotation phase of the body, all of which are mounted on the printing cylinder unit.

[0013]

In the offset printing machine according to claim 1, the plate cylinder,
A body such as a blanket cylinder is provided in the printing cylinder unit, and the printing cylinder peripheral mechanism such as the vertical printing register adjusting mechanism and the cylinder attaching / detaching mechanism and their driving devices are mounted on the printing cylinder unit in a state of being separated from the machine unit. Because
The printing cylinder unit is simply attached / detached to / from the printing cylinder unit mounting part of the machine unit.
The body such as the blanket cylinder and the peripheral mechanism of the printing cylinder can be replaced without requiring any special connecting work or assembling work.

An offset printing machine according to a second aspect is of the BB type in which a plate cylinder and a blanket cylinder are provided in two upper and lower directions, and a rotary phase adjusting section common to the upper and lower sides and a rotary phase adjusting section for the upper plate cylinder and The lower plate cylinder rotational phase adjustment unit, the actuators that drive the respective rotational phase adjustment units, and the transmission mechanism that drives and connects the actuator and the respective rotational phase adjustment units are all mounted on the printing cylinder unit, and two upper and lower plates are provided. Both the vertical printing register adjustment of the cylinder and the vertical printing register adjustment of the upper and lower plate cylinders are performed in each printing cylinder unit only by the configuration of the printing cylinder unit side.

According to another aspect of the offset printing machine of the present invention, a lever for rotatably displacing an eccentric bearing portion which constitutes a cylinder attaching / detaching mechanism,
The actuator and the transmission mechanism for drivingly connecting the lever and the actuator are all mounted on the printing cylinder unit,
The cylinder attachment / detachment is performed in each printing cylinder unit only by the configuration of the printing cylinder unit side.

In the offset printing press according to the present invention, all of the feed screw constituting the position adjusting mechanism for adjusting the axial position of the plate cylinder, the actuator, and the transmission mechanism for drivingly connecting the feed screw and the actuator are provided in the printing cylinder. It is mounted in the unit, and the lateral printing register adjustment is performed in each printing cylinder unit only by the configuration on the printing cylinder unit side.

According to another aspect of the offset printing machine of the present invention, a lever for rotating and displacing an eccentric bearing portion which constitutes a plate cylinder twist adjusting mechanism for adjusting the horizontal support posture of the plate cylinder, an actuator, and a driving connection between the lever and the actuator. All of the transmission mechanisms are installed in the printing cylinder unit, and the plate cylinder twist adjustment is performed in each printing cylinder unit only by the configuration on the printing cylinder unit side.

According to another aspect of the offset printing machine of the present invention, an electric motor constituting a single drive mechanism for independently driving the body provided in the printing cylinder unit, and a gear provided on the shaft portion of the body and the electric motor are drivingly connected. Rotational phase detector that detects the rotational phase of the transmission mechanism and the body is installed in the printing cylinder unit, and the axial direction position adjustment of the plate cylinder and the rotational phase detection of the body are performed only by the configuration of the printing cylinder unit side. Done.

[0019]

Embodiments of the present invention will be described in detail below with reference to the drawings.

(Overall Structure) FIG. 1 shows an embodiment in which the offset printing machine according to the present invention is applied to a BB (blanket-to-blanket) type unit rotary offset printing machine of four series. This printing machine has a first printing unit 1, a second printing unit 3, a third printing unit 5, and a fourth printing unit 7.

These printing units 1, 3, 5 and 7 have the same structure, and can be attached to and detached from the individually formed main unit 11 and the printing cylinder unit mounting portion 13 of the main unit 11. Printing cylinder unit 1 mounted on
5, and one main drive shaft 9 is provided in the main unit 11 of each of the printing units 1, 3, 5, and 7.

(Structure of Printing Unit) FIG. 2 shows the detailed structure of one printing unit. The machine unit 11 includes an ink reservoir 17, an ink discharge roller 19, an ink transfer roller 21, an ink leveling roller 23, a swaying roller 25, an ink kneading roller 27, and an inking roller 29.
And the like, and the upper dampening device 43 and the lower dampening device 45 by the water reservoir 35, the water source roller 37, the water transfer roller 39, the watering roller 41, etc. They are provided one above the other.

The printing cylinder unit 15 includes an upper plate cylinder 47 and an upper blanket cylinder 49 which is in sliding contact with the upper plate cylinder 47.
And a lower plate cylinder 51 and a lower blanket cylinder 53 which is in sliding contact with the lower plate cylinder 51, and the upper blanket cylinder 49 and the lower blanket cylinder 53 are vertically opposed to each other on the paper feed line L. It is a double-sided printing unit of the blank cylinder-to-blank cylinder method.

In FIG. 2, an upper plate cylinder 47, an upper blanket cylinder 49, a lower plate cylinder 51, and a lower blanket cylinder 53.
Each of the subscripts a, b, and c indicates that the body diameter is different.

As shown in FIG. 2, the upper plate cylinder 47 and the lower plate cylinder 51 of any cylinder diameter are in sliding contact with the inking roller 29 and the watering roller 41 of the machine unit 11 on the outer peripheral surfaces. , The upper blanket cylinder 49 of any cylinder diameter,
The lower blanket cylinder 53 also slidably contacts the upper plate cylinder 47 and the lower plate cylinder 51 having the corresponding cylinder diameters, and the upper blanket cylinder 49 and the lower blanket cylinder 53 are vertically opposed to each other on the paper feed line L. The center support positions of these bodies are different depending on the diameter of the body.

(Structure of Cylinder Drive System) As shown in FIGS. 4 and 5, the main drive shaft 9 is rotatably supported by the frame 57 of the machine unit 11 by the ball bearing 55. A drive-side bevel gear 59 is attached to the main drive shaft 9, and the drive-side bevel gear 59 meshes with a driven-side bevel gear 65 of a drive shaft 63 rotatably supported by a frame 57 by a ball bearing 61. There is. A spur gear 67 is attached to the drive shaft 63.

An intermediate shaft 69 is attached to the frame 57 in parallel with the drive shaft 63 so as to be movable in the axial direction. The intermediate shaft 69 rotatably supports a drive side spur gear 73 by a ball bearing 71, the spur gear 73 meshes with the spur gear 67, and forms a drive side gear as a final output gear on the machine unit 11 side. . Hereinafter, this spur gear 73 is referred to as a drive side spur gear. The upper side region of the drive side spur gear 73 is located in an opening 75 formed in the frame 57 so as to face the printing cylinder unit mounting portion 13.

An air cylinder device 79 is attached to the frame 57 by a bracket 77. The air cylinder device 79 is connected to the intermediate shaft 69, and reciprocally drives the intermediate shaft 69 in the axial direction with a predetermined stroke. Due to this movement of the intermediate shaft 69, the drive side spur gear 73 moves between the meshing position shown by the solid line in FIG. 4 and the meshing disengagement position shown by the phantom line in FIG.

The transmission side frame 81 of the printing cylinder unit 15
A phasing shaft 83 is attached to this so as to be movable in the axial direction. A driven side spur gear 87 and a helical gear 89 are rotatably attached to the phase adjusting shaft 83 by a ball bearing 85. The driven side spur gear 87 and the helical gear 89 are fixedly connected to each other, and the lower region of the driven side spur gear 87 is located in an opening 91 formed in the bottom of the frame 81.

By mounting the printing cylinder unit 15 in the printing cylinder unit mounting portion 13 of the machine unit 11 as shown, the opening 75 of the machine unit 11 and the opening 91 of the printing cylinder unit 15 are formed. Are aligned with each other, and the driven side spur gear 87 passes through the openings 75 and 91 and the driving side spur gear 7
It will face the arrangement part of 3.

As described above, when the printing cylinder unit 15 is mounted on the printing cylinder unit mounting portion 13 of the main unit 11, the drive side spur gear 73 is located at the meshing position, so that the driven side spur gear 73 is driven. By engaging with the gear 87 and being positioned at the engaging / disengaging position, it is disengaged from the engagement with the driven side spur gear 87.

The helical gear 89 is constantly meshed with a helical gear 95 rotatably supported by a ball bearing 93 by an intermediate shaft 91 fixed to the transmission side frame 81. A lower plate cylinder helical gear 99 spline-engaged with one shaft body 97 of the lower plate cylinder 51 by a spline engagement portion 98 is meshed with the helical gear 95, and the lower plate cylinder helical gear 99 is engaged. The lower blanket cylinder, which is attached to the shaft body 101 of the lower blanket cylinder 53, is meshed with the helical gear 103. An upper blank cylinder helical gear 107 attached to one shaft body 105 of the upper blanket cylinder 53 meshes with the lower blank cylinder helical gear 103, and an upper blank cylinder helical gear 107 has an upper plate. Upper plate cylinder helical gear 1 in which one shaft body 109 of the cylinder 47 is spline-engaged by a spline engaging portion 110.
11 meshes.

(Operation and Effect of Overall Configuration) The printing cylinder unit 15 is the printing cylinder unit mounting portion 1 of the main unit 11.
3, the intermediate shaft 69 is axially driven by the air cylinder device 79 to drive the spur gear 73 on the drive side.
Is located at the meshing position shown by the solid line in FIG. 3, the drive side spur gear 73 and the driven side spur gear 87 mesh with each other. As a result, the rotation of the main drive shaft 9 is transmitted to the drive-side bevel gear 59, the driven-side gear 65, the spur gear 67, the drive-side spur gear 73, and the driven-side spur gear 87, which further causes the helical gear. 89, 95, the upper plate cylinder 47,
The upper blanket cylinder 49, the lower plate cylinder 51, and the lower blanket cylinder 53 are rotationally driven.

Since the printing cylinder unit 15 is attached to and detached from the printing cylinder unit mounting portion 13 of the machine unit 11, the plate cylinders 47 and 51 and the blanket cylinders 49 and 53 are exchanged together with the printing cylinder unit 15. Plate cylinders 47, 51,
By preparing a plurality of types of the printing cylinder units 11 having blanket cylinders 49 and 53 having different cylinder diameters, different printing sizes can be obtained by simply replacing the printing cylinder unit 11 with the printing cylinder unit mounting portion 13 of the machine unit 11. Can be printed.

When the printing cylinder unit 15 is mounted on the printing cylinder unit mounting portion 13 of the machine unit 11, the drive side spur gear 73 of the machine unit 11 and the driven side spur gear 87 on the printing cylinder unit 1 are separated from each other. By the meshing engagement, the plate cylinders 47, 51 and the blanket cylinders 49, 53 are rotationally driven by the main drive shaft 9 in the machine unit 11, and the drive side spur gear 73 is moved by the axial movement of the drive side spur gear 73. It selectively engages with the driven side spur gear 87 or disengages from the engaged state with the driven side spur gear 87.

(Structure of Vertical Printing Register Adjustment Mechanism Common to Top and Bottom)
As shown in FIG. 4, the upper plate cylinder 47 and the lower plate cylinder 5
A screw shaft 115 that engages with a screw hole 113 formed at one end of the phase adjusting shaft 83 is rotatably attached to the transmission-side frame 81 as a rotation phase adjusting unit common to the upper and lower sides that simultaneously adjusts the rotation phase of 1. ing. This screw shaft 11
The rotation of 5 moves the phasing shaft 83 in the axial direction, and the axial movement of the phasing shaft 83 changes the meshing position of the helical gears 89 and 95 in the axial direction.

A worm 117 is attached to the screw shaft 115, and as shown in FIG.
A worm wheel 121, which is rotatably supported by a bracket 119 on the transmission side frame 81, is meshed with the gear 17.

An electric motor 123 for adjusting the rotational phase is mounted on the transmission-side frame 81. Electric motor 123
Is drivingly connected to the worm wheel 121 by a transmission mechanism including a universal joint 125, a connecting shaft 127, and a universal joint 129.

(Operation of the vertical printing register adjusting mechanism common to the upper and lower sides,
Effect) By rotation of the screw shaft 115 by the electric motor 123,
By moving the phase adjusting shaft 83 in the axial direction,
The meshing position of the helical gears 89 and 95 changes in the axial direction. As a result, the rotational phase of the helical gear 95 relative to the rotational phase of the main drive shaft 9 changes, and the upper plate cylinder 47 and the lower plate cylinder 5
The rotational phase of 1 is changed to the same at the same time, and the print registration adjustment in the vertical direction between the units is performed.

Since all the constituent elements of the vertical printing register adjusting mechanism are mounted on the printing cylinder unit 15 and do not include the constituent elements arranged across the main unit 11 and the printing cylinder unit 15, the printing cylinder unit 15 is not included. 15 can be easily replaced without assembling and disconnecting the vertical printing register adjusting mechanism.

(Structure of Vertical Printing Register Adjustment Mechanism for Upper Plate Cylinder)
As shown in FIG. 4, the upper vertical printing register adjusting mechanism for adjusting the rotational phase of the upper plate cylinder 47 is rotatably provided on the upper plate cylinder helical gear 111 by a ball bearing 131 as a rotational phase adjusting unit. The nut member 133 connected to the nut member 13 is rotatably supported by the transmission-side frame 81.
3 and a screw shaft 135 which is screw-engaged. By rotating this screw shaft 135, the upper plate cylinder helical gear 1
11 moves in the axial direction with respect to the shaft body 109 at the spline engagement portion 110.

A worm 137 is attached to the screw shaft 135, and as shown in FIG.
A worm wheel 141, which is rotatably supported by a bracket 139 from a transmission side frame 81, is meshed with 37.

An electric motor 143 for adjusting the rotation phase is mounted on the transmission side frame 81. The electric motor 143 is drivingly connected to the worm wheel 141 by a universal joint 145.

(Operation and Effect of Vertical Printing Register Adjusting Mechanism for Upper Plate Cylinder) Rotation of the screw shaft 135 by the electric motor 143 causes the upper plate cylinder helical gear 111 to move to the spline engaging portion 110.
Moves in the axial direction with respect to the shaft body 109, and the upper plate cylinder 47 moves by the axial movement of the helical gear 111.
Rotates. As a result, the rotational phase of the upper plate cylinder 47 is changed, and the printing register adjustment of the upper plate cylinder 47 in the vertical direction is performed.

Since all the constituent elements of this vertical printing register adjusting mechanism are mounted on the printing cylinder unit 15 and do not include the constituent elements arranged across the main unit 11 and the printing cylinder unit 15, the printing cylinder unit 15 is not included. 15 can be easily replaced without assembling and disconnecting the vertical printing register adjusting mechanism.

(Structure of Vertical Printing Register Adjustment Mechanism for Lower Plate Cylinder)
As shown in FIG. 4, the lower longitudinal printing register adjusting mechanism for adjusting the rotational phase of the lower plate cylinder 51 includes a nut member 149 rotatably connected to the lower plate cylinder helical gear 99 by a ball bearing 147. And a screw shaft 1 rotatably supported by the transmission side frame 81 and screw-engaged with the nut member 149.
And 51. As the screw shaft 151 rotates, the lower plate cylinder helical gear 99 moves the spline engagement portion 98.
Moves in the axial direction with respect to the shaft 97.

A worm 153 is attached to the screw shaft 151, and as shown in FIG.
A worm wheel 157, which is rotatably supported by a bracket 155 from the transmission-side frame 81, meshes with 53.

An electric motor 159 for adjusting the rotational phase is mounted on the transmission-side frame 81. Electric motor 159
Is drivingly connected to the worm wheel 157 by a universal joint 161, a connecting shaft 163, and a universal joint 165.

(Operation and Effect of Vertical Printing Register Adjusting Mechanism for Lower Plate Cylinder) Rotation of the screw shaft 151 by the electric motor 159 causes the lower plate cylinder helical gear 99 to engage with the shaft body 97 at the spline engagement portion 98. The lower plate cylinder 51 is rotated by the axial movement of the lower plate cylinder helical gear 99. As a result, the rotational phase of the lower plate cylinder 51 is changed, and the print register adjustment of the lower plate cylinder 51 in the vertical direction is performed.

Since all the constituent elements of the vertical printing register adjusting mechanism are mounted on the printing cylinder unit 15 and do not include the constituent elements arranged over the main unit 11 and the printing cylinder unit 15, the printing cylinder unit 15 is not included. 15 can be easily replaced without assembling and disconnecting the vertical printing register adjusting mechanism.

(Structure of Horizontal Printing Register Adjustment Mechanism) FIGS. 3 and 4
As shown in FIG. 2, the upper plate cylinder 47 and the lower plate cylinder 51 are respectively located between the transmission side frame 81 and the operation side frame 171, and the shaft bodies 109 and 97 provided at both ends are respectively rolled bearings 173, 175, 177, 179 and bearing boxes 181, 183, 18 holding these bearings
5, 187 rotatably and axially displaceably support the transmission-side frame 81 and the operation-side frame 171.

Bearing box 18 of operation side frame 171
Feed screws 193 and 195, which are rotatably supported by brackets 189 and 191 from the operation side frame 171, are screw-engaged with the screws 3 and 187, respectively. As the feed screws 193 and 195 rotate, the bearing boxes 183 and 187 are displaced in the axial direction, and the upper plate cylinder 47 and
The axial position of the lower plate cylinder 51 is adjusted.

A worm 197 is attached to the feed screw 193, and as shown in FIG. 7, the worm 197 is attached to the bracket 199 from the operation side frame 171.
Worm wheel 201 rotatably supported by
Are in mesh.

The electric motor 2 is provided above the operation side frame 171.
03 is installed. The electric motor 203 is a universal joint 20.
5 is drivingly connected to the worm wheel 201.

A worm 207 is attached to the feed screw 195. As shown in FIG. 7, the worm 207 is attached to the bracket 209 from the operation side frame 171.
Worm wheel 211 rotatably supported by
Are in mesh.

The electric motor 2 is provided above the operation side frame 171.
13 is mounted. The electric motor 213 is a universal joint 21.
5, the connecting shaft 217 and the universal joint 219 are drivingly connected to the worm wheel 211.

(Operation and Effect of Horizontal Printing Register Adjustment Mechanism) The rotation of the feed screw 193 by the electric motor 203 displaces the bearing box 183 in the axial direction, and the bearing box 18 is moved.
Due to the axial displacement of 3, the upper plate cylinder 47 is moved in the axial direction, and the lateral print register adjustment of the upper plate cylinder 47 is performed.

The rotation of the feed screw 195 by the electric motor 215 causes the bearing box 187 to be displaced in the axial direction,
Due to the axial displacement of the bearing box 187, the lower plate cylinder 51 is moved in the axial direction, and the printing register adjustment of the lower plate cylinder 51 in the lateral direction is performed.

Since all the constituent elements of this lateral printing register adjusting mechanism are mounted on the printing cylinder unit 15 and do not include the constituent elements arranged across the main unit 11 and the printing cylinder unit 15, the printing cylinder unit 15 is not included. The replacement of 15 is easily performed without assembling and disconnecting the lateral printing register adjusting mechanism.

(Structure of Plate Cylinder Twist Adjustment Mechanism) FIGS. 3 and 7
As shown in FIG. 5, the bearing boxes 183, 18 on the side of the operating side frame 171 of the upper plate cylinder 47 and the lower plate cylinder 51.
7 has an eccentric cam shape, and has bearing boxes 183, 1
The horizontal support postures of the upper plate cylinder 47 and the lower plate cylinder 51 are adjusted by rotationally displacing 87 with respect to the operation side frame 171.

The levers 2 are attached to the bearing boxes 183 and 187.
21 and 223 are attached to the levers 221 and 2
The feed screws 225 and 227 are screw-engaged with the screw 3, respectively. The feed screws 225 and 227 are respectively the operation side frame 17
The brackets 229 and 231 fixed to 1 are connected to the shafts 233 and 235 which are rotatably supported. Axis 2
Worm wheels 237 and 239 are provided on 33 and 235, respectively.
Is attached to the worm wheel 237, 23
9 includes brackets 24 from the operation side frame 171.
Worm 24 rotatably supported by 1, 243
5, 247 are meshed.

The electric motor 2 is provided above the operation side frame 171.
49 and 251 are mounted. The electric motor 249 is drivingly connected to the worm 245 by a universal joint 253, a connecting shaft 255, and a universal joint 257. The electric motor 251
The universal joint 259, the connecting shaft 261, and the universal joint 263 are drivingly connected to the worm 247.

(Operation and Effect of Plate Cylinder Twist Adjustment Mechanism) The rotation of the feed screw 225 by the electric motor 249 causes the lever 2 to move.
21, the bearing box 183 is eccentrically rotated by the rotation of the lever 221, and the levelness of the axis line of the upper plate cylinder 47 is adjusted according to the amount of eccentric rotation.

The rotation of the feed screw 227 by the electric motor 251 causes the lever 223 to rotate, and the lever 223 rotates.
The bearing box 187 is eccentrically rotated by the rotation of, and the horizontalness of the axis of the lower plate cylinder 51 is adjusted according to the amount of rotation eccentricity.

Since all the constituent elements of the plate cylinder twist adjusting mechanism are mounted on the printing cylinder unit 15 and do not include the constituent elements arranged across the main unit 11 and the printing cylinder unit 15, the printing cylinder unit 15 is not included. 15 can be easily replaced without assembling and disconnecting the plate cylinder twist adjusting mechanism.

(Cylinder Attachment / Detachment Mechanism) As shown in FIGS. 3 and 4, the upper blanket cylinder 49 and the lower blanket cylinder 53 are respectively the transmission side frame 81 and the operation side frame 17.
1, shafts 105, 10 provided at both ends
1 is rotatably supported by the transmission-side frame 81 and the operation-side frame 171 by rolling bearings 271, 273 and bearing boxes 275, 277 holding these bearings.

The transmission side frame 81 and the operation side frame 171 of the upper blanket cylinder 49 and the lower blanket cylinder 53.
Each of the bearing boxes 275 and 277 on the side of is formed with an eccentric cam shape, and the bearing bocks 275 and 277 are rotationally displaced with respect to the transmission side frame 81 and the operation side frame 171, whereby the upper blanket cylinder 49 and the lower blanket. The support position of the cylinder 53 is changed, and the cylinder 53 is separated from the upper plate cylinder 47 and the lower plate cylinder 51.

As shown in FIG. 8, each of the bearing blocks 275 and 277 of the transmission side frame 81 has a lever 2 attached thereto.
79 and 281 are attached to the levers 279 and 2
81 is pivotally connected to a turnbuckle 283. Although the levers 279 and 281 are not shown in the figure, the bearing blocks 275 and 275 of the operation side frame 171 are not shown.
It is also attached to each of 77, and its lever is pivotally connected by a turnbuckle like the transmission side frame 81 side.

A fluid pressure cylinder device 287 is attached to the upper portion of the transmission side frame 81 by a bracket 285. Transmission side frame 81 and operation side frame 171
Rotatably supports a rotary shaft 289 extending horizontally between the two. A drive arm 291 is attached to an end of the rotary shaft 289 on the transmission frame 81 side, and the drive arm 291 is drivingly connected to a pistun rod 295 of the fluid pressure cylinder device 287 by a pin 293.

As shown in FIG. 3, the rotating shaft 289
An arm 295 is attached to each of the transmission-side frame 81 and the operation-side frame 171, and as shown in FIG. 8, the arm 295 is drivingly connected to the lever 279 by a connecting rod 297 having a turnbuckle. There is. In this connection structure, the transmission side frame 81 and the operation side frame 171 have the same structure.

Further, as shown in FIG. 8, the bearing lever 277 has a stopper lever 29 with an adjusting screw.
9 is attached, and the stopper lever 299 abuts the stopper screw 301 attached to the transmission side frame 81 to set the bearing positions of the bearing blocks 275 and 277.

(Operation and Effect of Body Attachment / Detachment Mechanism) The rotary shaft 289 is rotationally driven by the fluid pressure cylinder device 287, so that the transmission side frame 81 side and the operation side frame 17 side.
The bearing blocks 275, 277 on the first side rotate eccentrically in the same manner as each other, and the upper blanket cylinder 49 and the lower blanket cylinder 5
3 is separated from the upper plate cylinder 47 and the lower plate cylinder 51. Further, by the operation in the opposite direction, the upper blanket cylinder 49 and the lower blanket cylinder 53 are returned to the regular landing positions.

Since all the constituent elements of this cylinder attaching / detaching mechanism are mounted on the printing cylinder unit 15 and do not include the constituent elements arranged across the main unit 11 and the printing cylinder unit 15, the components of the printing cylinder unit 15 are not included. The replacement can be easily performed without assembling and disconnecting the body attaching / detaching mechanism.

(Structure of Independent Driving Mechanism) As shown in FIG. 4, an independent driving electric motor 311 with a speed reducer is attached to the transmission side frame 81.
The output shaft 313 is selectively drive-coupled with a rotary shaft 315 rotatably supported by the transmission-side frame 81 and an electromagnetic clutch 317. An independently driving helical gear 319 is fixedly mounted on the rotating shaft 315. The independently driving helical gear 319 is an intermediate helical gear 323 of an intermediate shaft 321 rotatably supported by the transmission side frame 81. The upper plate cylinder is drivingly connected to the helical gear 111 via.

The intermediate shaft 321 includes a rotary encoder 325 mounted on the transmission side frame 81 and a coupling 3
They are connected by 27.

(Operation and Effect of Independent Drive Mechanism) With the drive spur gear 73 separated from the driven spur gear 87 by the air cylinder device 79, the electromagnetic clutch 317 is connected to rotate the independent drive electric motor 311. As a result, the upper plate cylinder 47, the upper blanket cylinder 49, the lower plate cylinder 51, and the lower blanket cylinder 53 are rotationally driven by the helical gear train regardless of the main drive shaft 9.

When the main drive shaft 9 is rotationally driving each cylinder, the electromagnetic clutch 317 is disengaged, and the independent drive electric motor 31 is released.
1 is disconnected from the helical gear train, and the independent drive electric motor 311 is protected.

Since the number of teeth of the intermediate helical gear 323 is the same as the number of teeth of the upper plate cylinder helical gear 111, both of the main drive shaft 9 and the independent drive electric motor 311 are driven to rotate. The rotary encoder 325 detects the rotation phase of the plate cylinder.

As a result, the upper plate cylinder 47, the upper blanket cylinder 49, the lower plate cylinder 51 and the lower blanket cylinder 53 are independently driven and their fixed positions are stopped.

All the constituent elements of this independent drive mechanism are mounted on the printing cylinder unit 15 and the main unit 11
Since it does not include the constituent elements arranged across the printing cylinder unit 15 and the printing cylinder unit 15, the printing cylinder unit 15 can be easily replaced without assembling and disconnecting the independent drive mechanism.

In the above-mentioned embodiment, the 4-cylinder type BB method is used, but the offset printing machine according to the present invention is not limited to this, and can be similarly applied to a 3-cylinder type. In the case of the three-cylinder type, the inking device 33 and the dampening device 45 on the lower side of the machine unit 11 are omitted, and the printing cylinder unit 15 is replaced by the lower plate cylinder 51 and the blanket cylinder 53. The body should be attached.

In the above, the present invention has been described in detail with respect to a specific embodiment, but the present invention is not limited to this, and various embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art.

[0083]

As can be understood from the above description, according to the offset printing machine of the first aspect, a body such as a plate cylinder or a blanket cylinder is provided in the printing cylinder unit, and the printing cylinder unit has a vertical cylinder. Since the printing cylinder adjustment mechanism, the printing cylinder peripheral mechanism such as the cylinder attachment / detachment mechanism, and their drive units are mounted separately from the machine unit, the printing cylinder unit is mounted on the printing cylinder unit mounting part of the machine unit. By simply attaching and detaching the printing cylinder unit, the body such as the plate cylinder and the blanket cylinder and the peripheral mechanism of the printing cylinder can be replaced without any special connection work or assembly work.

Therefore, by preparing a plurality of types of printing cylinder units having different cylinder diameters such as a plate cylinder and a blanket cylinder, different printing can be performed only by exchanging the printing cylinder unit to the printing cylinder unit mounting portion of the machine unit. Printing of the size is performed, and print register adjustment and the like are performed in each printing cylinder unit only by the configuration of the printing cylinder unit side.

According to the offset printing press of the second aspect, all of the constituent elements of the vertical printing register adjusting mechanism are mounted on the printing cylinder unit, and the vertical printing register adjusting mechanism is installed in the main unit and the printing cylinder unit. The printing cylinder unit can be easily replaced without assembling and disconnecting the vertical printing register adjusting mechanism, since it does not include the constituent elements arranged in a span.

In the offset printing press according to the third aspect, all the constituent elements of the cylinder attaching / detaching mechanism are mounted on the printing cylinder unit, and the cylinder attaching / detaching mechanism is arranged so as to extend over the main unit and the printing cylinder unit. Because it does not include requirements
The printing cylinder unit can be easily replaced without assembling and disconnecting the cylinder attaching / detaching mechanism.

In the offset printing press according to the fourth aspect, all of the constituent elements of the lateral printing register adjusting mechanism are mounted on the printing cylinder unit, and the lateral printing register adjusting mechanism extends across the main unit and the printing cylinder unit. Since the arranged constituent elements are not included, the printing cylinder unit can be easily replaced without assembling and disconnecting the lateral printing register adjusting mechanism.

In the offset printing press according to the fifth aspect, all of the components constituting the plate cylinder twist adjusting mechanism are mounted on the printing cylinder unit, and the plate cylinder twist adjusting mechanism is provided across the main unit and the printing cylinder unit. Since the arranged constituent elements are not included, the printing cylinder unit can be easily replaced without assembling and disconnecting the plate cylinder twist adjusting mechanism.

In the offset printing press according to the sixth aspect, all the constituent elements of the independent drive mechanism are mounted on the printing cylinder unit, and the independent drive mechanism is arranged so as to straddle the main unit and the printing cylinder unit. Since the requirements are not included, the printing cylinder unit can be easily replaced without assembling and disconnecting the single drive mechanism.

[Brief description of drawings]

FIG. 1 shows an offset printing machine according to the present invention with four BBs.
It is the whole block diagram which shows the example which is applied to the unit type rotary offset printing machine of the system.

FIG. 2 is a side view showing a detailed structure of an offset printing machine according to the present invention.

FIG. 3 is a front view of a printing cylinder unit of an offset printing machine according to the present invention.

FIG. 4 is a vertical cross-sectional view (cross-sectional view of the transmission side frame portion taken along the line BB of FIG. 3) showing an embodiment of the cylinder drive system of the offset printing machine according to the present invention.

FIG. 5 is a side sectional view showing a gear train of a cylinder drive system of an offset printing machine according to the present invention.

FIG. 6 is a side view of the transmission side frame of the printing cylinder unit of the offset printing machine according to the present invention.

FIG. 7 is a side view of the operating side frame of the printing cylinder unit of the offset printing machine according to the present invention.

8 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st printing unit 3 2nd printing unit 5 3rd printing unit 7 4th printing unit 9 Main drive shaft 11 This machine unit 13 Printing cylinder unit mounting part 15 Printing cylinder unit 31 Upper ink supply device 33 Lower ink supply device 43 Upper part Damper 45 Lower dampener 47 Upper plate cylinder 49 Upper blanket cylinder 51 Lower plate cylinder 53 Lower blanket cylinder 73 Drive side spur gear 79 Air cylinder device 81 Transmission side frame 87 Driven side spur gear 89, 95 Helical gear 99 Lower plate cylinder helical gear 103 Lower blank cylinder helical gear 107 Upper blank cylinder helical gear 111 Upper plate cylinder helical gear 115 Screw shaft 117 Worm 121 Worm wheel 123 Electric motor 135 Screw shaft 137 Worm 141 Worm wheel 143 electric motor 151 screw shaft 153 worm 15 7 worm wheel 159 electric motor 181, 183, 185, 187 bearing box 193, 195 feed screw 197 worm 201 worm wheel 203 electric motor 207 worm 211 worm wheel 213 electric motor 225, 227 feed screw 237, 239 worm wheel 245, 247 worm wheel 249, 251 Electric motor 275, 277 Bearing box 287 Fluid pressure cylinder device 289 Rotating shaft 291 Drive arm 311 Independent drive electric motor 317 Electromagnetic clutch 319 Independent drive helical gear 317 Electromagnetic clutch 325 Rotary encoder 32

Claims (6)

[Claims] 1. A machine unit having an ink supply device, a dampening device, and a drive shaft, and a body such as a plate cylinder and a blanket cylinder are attached, and are detachably attached to a printing cylinder unit attachment portion of the unit. And a printing cylinder unit
A drive side gear drivingly connected to the drive shaft is disposed in the printing cylinder unit mounting portion of the machine unit, and a driven side gear drivingly connected to the body is provided in the printing cylinder unit, When the cylinder unit is mounted on the printing cylinder unit mounting portion, the driving-side gear and the driven-side gear are configured to mesh with each other, and the printing cylinder unit has a printing register in the moving direction of the printing paper. An offset printing machine, comprising: a vertical printing register adjusting mechanism, a printing cylinder peripheral mechanism such as a cylinder mounting / removing mechanism, and a driving device for them, which are separated from the main unit. 2. The printing cylinder unit is provided with two upper and lower plate cylinders and a blanket cylinder, and the vertical printing register adjusting mechanism adjusts the rotational phases of the upper and lower plate cylinders at the same time. And an upper plate cylinder rotational phase adjustment unit and a lower plate cylinder rotational phase adjustment unit that individually perform the rotational phases of the upper and lower plate cylinders, respectively, and each rotational phase adjustment unit and each rotational phase adjustment unit thereof. The offset printing machine according to claim 1, wherein an actuator for driving the printing cylinder unit and a transmission mechanism for drivingly connecting the actuator and each of the rotary phase adjusting units are mounted on the printing cylinder unit. 3. The cylinder attachment / detachment mechanism includes a lever for rotationally displacing eccentric bearing portions on both sides of the blanket cylinder, an actuator, and a transmission mechanism for drivingly connecting the lever and the actuator, all of which are provided. The offset printing machine according to claim 1, wherein the offset printing machine is mounted on the printing cylinder unit. 4. The printing cylinder peripheral mechanism includes a lateral printing register adjusting mechanism for adjusting a printing register in a direction orthogonal to a moving direction of the printing paper, and the lateral printing register adjusting mechanism is connected to a bearing box of the plate cylinder. A feed screw for rotating the plate cylinder in the axial direction by rotating the actuator, an actuator, and a transmission mechanism drivingly connecting the feed screw and the actuator, all of which are mounted on the printing cylinder unit. The offset printing machine according to any one of claims 1 to 3, characterized in that: 5. A plate cylinder twist adjusting mechanism for adjusting a horizontal support posture of the plate cylinder is provided as the printing cylinder peripheral mechanism, and the plate cylinder twist adjusting mechanism rotationally displaces an eccentric bearing portion on one side of the plate cylinder. 5. A lever, an actuator, and a transmission mechanism for drivingly connecting the lever and the actuator, all of which are mounted on the printing cylinder unit. Offset printing machine described. 6. The printing cylinder peripheral mechanism includes a single driving mechanism for independently driving a body provided in the printing cylinder unit such as a plate cylinder and a blanket cylinder, and the single driving mechanism comprises:
An electric motor, a transmission mechanism for drivingly connecting the gear provided on the shaft portion of the body and the electric motor, and a rotational phase detector for detecting a rotational phase of the body, all of which are included in the printing cylinder unit. The offset printing machine according to any one of claims 1 to 5, which is mounted.