JPH043304B2 - - Google Patents

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention provides a method for applying varnish to the printed surface of paper after printing by providing a varnishing device between a printing unit and a paper discharge device of a rotary printing press or in an independent varnishing machine. This invention relates to a printed matter varnishing device.

[Prior art]

The printed surface of paper printed with a rotary printing machine is prone to staining in subsequent processes because the ink dries slowly, and in the case of sheet-fed paper, set-off occurs when stacking discharged sheets, so this can be prevented. In order to do this, a drying device is installed in the conveyance path of the printed paper, or a spray powder is applied at this location. However, drying equipment requires large-scale equipment, and dust particles can make the paper rough and lose its luster, or cause problems when reprinting, so as an alternative, varnish can be applied to the surface of the printed paper. This is mainly done to prevent stains and give gloss to paper surfaces, for example, for printed matter that requires beauty, such as book covers, catalogs, and pamphlets.

This type of varnishing equipment is sometimes installed as an independent varnishing machine, but since it requires not only the direct work time but also the transfer of paper, the work efficiency is poor, so in recent years it has been Generally, it is installed within the Its structure includes a roller group arranged in the same way as a water supply device that supplies water to the surface of a printing plate mounted on the plate cylinder of a printing device, and the varnish stored in the varnish tank is passed through this roller group. In most cases, the varnish is supplied to the surface of the blanket cylinder, and the varnish is transferred from the blanket cylinder to the paper passing between the blanket cylinder and the impression cylinder.

However, in this type of conventional varnishing apparatus, there have been the following problems regarding the rotation transmission structure of each roller and unevenness in varnish thickness caused by this. In other words, when the machine is stopped for reloading paper, replacing the ejected paper stacking table, or adjusting the blanket cylinder blanket insole due to paper size changes, the blanket cylinder is separated from the impression cylinder, and each Conventionally, it has been common practice to leave the rollers rotating to avoid problems caused by solidification of the varnish on the peripheral surface of the rollers when the operation is restarted.
In this case, the rubber cylinder is driven from the line shaft side of the machine,
There are cases where it is required to drive from the original roller on the upstream side to the application roller with a separate variable motor for purposes such as adjusting the varnish film thickness. Relative rotational unevenness occurs between the applicator roller and the rubber cylinder, where the rollers come into contact with each other, and this often results in uneven varnish film thickness. However, if you try to use the same drive system as the applicator roller and the blanket cylinder, and connect them with a gear, when the blanket cylinder is stopped for cleaning or adjusting the insole, the applicator roller will also stop at the same time, causing the applicator roller to stop at the same time. There was a problem in that the varnish on the circumferential surface hardened and the application roller had to be cleaned.

[Summary of the invention]

The present invention has been developed in view of the above points, and it is possible to synchronize the blanket cylinder and the applicator roller and drive them to rotate using a main drive source, and to change the rotational speed of the roller located upstream of the varnish transfer side than the applicator roller. In addition, an electromagnetic clutch is provided between the blanket cylinder and the forming roller, and between the sub-driving source and the forming roller, and is controlled by a control device so that both do not operate at the same time. The electromagnetic clutch between the auxiliary drive source and the forming roller is installed closer to the forming roller than the original roller that rotates in the varnish container, and when the blanket cylinder rotates, the electromagnetic clutch between the blanket cylinder and forming roller is connected and the forming roller is connected. The roller is configured to be driven from the blanket cylinder side to prevent the varnish on the application roller from solidifying when the blanket cylinder is stopped,
To provide a printed matter varnishing device that enables simultaneous cleaning of a blanket cylinder and a form roller, and also ensures uniformity of varnish film thickness during varnishing. Embodiments of the present invention will be described in detail below with reference to the drawings.

〔Example〕

1 to 6 show an embodiment of the varnishing device according to the present invention, FIG. 1 is a schematic side view of a four-color sheet-fed rotary printing press in which this is implemented, and FIG. 2 is a fourth-color printing machine. Figure 3 is a side view of the varnishing unit and the varnishing unit; Figure 4 is a side view of the varnishing device;
The figure is a developed cross-sectional view of the rubber cylinder and the vicinity of the forming roller, and the 5th
The figure is a developed cross-sectional view of the vicinity of the original roller and metering roller, and Figure 6 is a third
FIG. 3 is a side view of the corresponding portion in the figure, viewed from outside the frame. In the figure, a printing machine 1 has a paper feed device 2, a paper feed device 4,
It includes a color printing unit 3, a varnishing unit 4, and a paper discharge device 5, each of which is assembled separately and joined together. Each printing unit 3 includes a plate cylinder 6 having a printing plate attached to its circumferential surface;
An inking device (not shown) that supplies ink to the printing plate and a water supply device 7 that supplies dampening water are provided, and the printing cylinder 6 is provided with an image formed on the printing plate using ink and dampening water, and an image that is transferred thereto. In each printing unit 3 with which the blanket cylinder 8 is in contact, an impression cylinder 9 with a double diameter is disposed in opposition to the blanket cylinder 8, and each adjacent impression cylinder 9
In between, a transfer cylinder 10 having a double diameter is provided in opposition to both impression cylinders 9. Also varnishing unit 4
Also, a double diameter impression cylinder 11 is provided at the same height as the other impression cylinders, and a transfer cylinder 12 is also provided between this impression cylinder 11 and the fourth color impression cylinder 9. The paper 13 stacked on the paper stacking table of the paper feeder 2 is sucked one by one by a suction device (not shown) and sent onto the differential plate 14, and then a swing device is used to pick up the impression cylinder 9 of the first color. After that, while the transfer cylinder 10 and the impression cylinder 9 alternately change the grips and are conveyed, four-color printing is applied between the blanket cylinder 8 and the varnishing unit. It is held in the claw of the impression cylinder 11 of No. 4 and wrapped around the circumferential surface. The paper discharge device 5 is the impression cylinder 1
1, and a pair of left and right sprockets 16 fixed coaxially with the paper ejection cylinder 15, and a number of sprockets 18 between the left and right sprockets 16 and a sprocket 18 at the front end of the paper ejection frame 17. A paper ejection chain 19 having paper ejection claws at regular intervals is stretched. Then, the paper 13 held in the claw of the impression cylinder 11 is transferred to the paper ejection claw of the paper ejection chain 19 and conveyed, and falls onto the paper stacking table 20 which is released from the paper ejection claw at the end of the conveyance and is stacked. be done.

The varnishing unit 4 of the printing press 1 roughly configured as described above includes a varnishing device 2 described below.
1 is provided. That is, a rubber cylinder 23 having the same diameter as the rubber cylinder 8 and having a blanket wrapped around its circumference is supported on the left and right frames 22 via a double-layer rolling bearing 24 and a plain bearing 25. . This rubber cylinder is rotated in the direction shown by arrow A in the figure due to the rotation of the body gear 26 which is drivingly connected to the driving side, and the outer diameter axes of the two bearings 24 and 25 and the body axis are aligned as shown in the figure. The rubber cylinder 23 is attached to and detached from the impression cylinder 11 by reciprocating the lever 27 which is eccentrically connected to the bearing 24 as shown by symbols t ₁ and t ₂ using an air cylinder, and the rubber cylinder 23 is attached to and removed from the impression cylinder 11 . The contact pressure between the rubber cylinder 23 and the impression cylinder 11 is adjusted by reciprocating a pivotably mounted lever 28 using a handle.

On the other hand, a DC variable motor 30 is fixedly supported on a bracket 29 fixed to the outside of the frame 22 on one side, and a gearbox 32 directly connected to the shaft of the motor 30 with a coupling 31 is also connected to the frame 22.
It is fixedly supported by a bracket 33 fixed to the outside of 2. A drive gear shaft 34 is rotatably supported on the gear box 32 and is perpendicular to the motor direct connection shaft and is drivingly connected to the shaft by an internal bevel gear. A supported drive gear 36 is fixed. The frame 22 has a gear shaft 3 that rotatably supports an intermediate gear 37 that meshes with a drive gear 36.
8 is pivotally supported via a bearing 39, and one end of a former roller 41 whose other end is pivotally supported by a bearing 40 of the frame 22 on the opposite side is rotatable at the bearing portion of the gear shaft 38 that protrudes inside the frame 22. It is freely supported. The original roller 41 is dipped in varnish 43 stored in a varnish boat 42, and an original roller gear 44 is fixed to the flange near the gear shaft 38. code 4
Gears 5 and 46 mesh with the intermediate gear 37 and the original roller gear 44 to transmit the rotation of the intermediate gear 37 to the original roller 41, and are supported by a bearing 47 fitted to the frame 22. gear shaft 4
By this drive, the original roller 41 rotates in the direction shown by arrow B in the figure. Between the flange of the original roller 41 and the bearing 40 and between the flange of the gear shaft 38 and the bearing 39, L-shaped roller arms 49 and 50 are loosely mounted via thrust bearings. and roller arm 4
A T-arm 51 formed in an inverted T-shape is pivotally attached to one free end of each of the arms 9 and 50 by a pin 52 . A bearing 53 with an eccentric bearing portion is fixed to one free end of the left and right T-arms 51 so as to be rotatably adjustable, as shown by the symbol _t3 in the figure. A metering roller 54 having a surface is pivotally supported with its circumferential surface in contact with the circumferential surface of the original roller 41 . This metering roller 54 is rotated in the direction shown by arrow C in the figure by meshing a gear shaft 55 fixed to its shaft end with the original roller gear 44, and by loosening the bolt, the bearing 53 is rotated. By moving the roller, the nip pressure against the original roller 41 is adjusted. Also, one roller arm 49 and T-shaped arm 5
1 is connected to the metering roller 54 by a lever 56 having an eccentric portion at one end, which is indicated by the symbol _t4 in the figure, and by manually rotating the pin 57 of the eccentric portion, the metering roller 54 is connected to the original roller 41. It is configured so that it can be attached to and detached from it. What is indicated by the reference numeral 58 is the large diameter portion 5
8a and a small diameter portion 58b, and is fixed to a portion of a cam shaft 59 that is mounted between the left and right frames 22 near both frames 22, and the cam surface has a free play of the T-shaped arm 51. A roller 60, which is eccentrically adjustable and pivotally mounted, is opposed to the end portion, as shown by reference numeral _t5 in the figure. A spring shaft 62 whose rotation can be freely adjusted is pivotally supported by a stud 61 implanted in the frame 22, with one end pivotally attached to the T-shaped arm 51.
The arm 51 is a compression coil spring 6 on a spring shaft 62.
3 applies a rotational force in the direction of pressing the roller 60 against the cam 58. The frame 2 is attached to the free end of the lever 64 fixed to one end of the camshaft 59.
A piston rod 66 of an air cylinder 65 whose one end is pivotally connected to the 2 side is pivotally connected, and by expanding and contracting the piston rod 66, the gum 58 rotates, and the rubber 58 is rotated through the roller 60 and the T-shaped arm 51 to the original roller 4.
The metering roller 54 is configured to be attached to and detached from the roller 1.

Above the rubber cylinder 23, an eccentric bearing 67 is pivotally supported by the left and right frames 22, in which the axis of the outer diameter is eccentric to the axis of the inner diameter as shown by the symbol _t6 in the figure.
A deposition roller 68 is supported by the eccentric bearing 67 with its circumferential surface facing the circumferential surface of the blanket cylinder 23 . The other end of the connecting lever 69, which is pivotally attached to the outer circumferential protrusion of one eccentric bearing 67, is pivoted to a lever 71 on a lever shaft 70 that is pivotally supported by the frame 22, as shown unfolded toward the side of FIG. The working end of a piston rod 75 of an air cylinder 74, which is pivotally connected to a stud 73 projecting from the frame 22, is pivotally connected to a lever 72 fixed to one end of a lever shaft 70. Then, by expanding and contracting the piston rod 75 of the air cylinder 74, the connecting lever 69
The eccentric bearing 67 rotates through the roller 68, etc.
is configured to be attached to and detached from the rubber cylinder 23. 6 is a bearing that is fixed to the bracket on the frame 22 side and supports the lever shaft 70 outside the frame 22. A roller shaft 77 is attached to another protruding portion that is out of phase with the connecting lever 69 pivot portion of the eccentric bearing 67 in the circumferential direction.
is fixed in a rotatably adjustable manner by split tightening, and the inner ring of a roller 78 made of a ball bearing is fixed to the center of the roller shaft 77 and an eccentric portion that is eccentric as shown by the number _t7 in the figure. ing. The camshaft 79 is rotatably supported by the left and right frames 22 via eccentric bearings 80, and as shown in FIG.
Rotate the cam shaft 7 so that the axis of the cam shaft 8 forms a nearly right triangle.
9 position is set. A cam 81 having an outer circumferential cam surface consisting of a large diameter portion 81a and a small diameter portion 81b is fixed to the cam shaft 79 by split tightening. It is rotatably supported by a bearing 80. A lever 82 is fixed to the protruding end of the camshaft 79 by split clamping, and the frame 22 is fixed to the free end of the lever 82.
The working end of a piston rod 85 of an air cylinder 84 is pivotally connected to the piston rod 85 via a stud 83. Furthermore, a bolt 86 is pivotally attached to the inner protrusion of the frame 22 of the eccentric bearing 80. It is screwed into the handle 88. Then, by rotating the handle 88, the bolt 86 is
The cam 81 moves eccentrically together with the camshaft 79 to move its axis. In such a mechanism for attaching and removing the forming roller 68, the direction in which the piston rod 75 of the air cylinder 74 contracts, that is, the direction in which the eccentric bearing 67 rotates clockwise in FIG. At this time, the eccentric direction of the eccentric bearing 67 is set so that the forming roller 68 is attached to and removed from the metering roller 54 while keeping the center-to-center distance substantially constant. Further, in the position shown in FIG. 6, both the blanket cylinder 23 and the forming roller 68 are in the applied state, and at this time, the piston rod of the air cylinder 84 is contracted, and the large diameter portion 81a of the cam 81 is attached to the roller 78. The rollers 78 that are in contact with each other are urged by the air pressure of the air cylinder 74 and are pressed into contact with the cam 81. Furthermore, the sixth
When the application roller 68 is placed on the blanket cylinder 23 after the blanket cylinder 23 has been removed from the position shown in the figure, the piston rod 85 of the air cylinder 84 is
The part 78 that extends and rotates the cam 81 counterclockwise is pressed against the small diameter portion 81b of the cam 81 by the bias of the air cylinder 74, and the application roller 6
8 is attached to the rubber cylinder 23. That is, at each position where the blanket cylinder 23 is attached or removed, the contact pressure of the forming roller 68 against the blanket cylinder 23 is regulated by the large diameter portion 81a and the small diameter portion 81b of the cam 81. The contact pressure is adjusted by moving the cam 81 by rotating the handle 88. The reference numeral 89 is a release stopper screwed into the stud 90 on the frame 22 side, and when the rubber cylinder 23 is in the landing position, the eccentric bearing 68 is released by contracting the piston rod 75 of the air cylinder 74. The application roller 68 is configured to be rotated until it comes into contact with a stopper 89, and the removal position of the application roller 68 from the blanket cylinder 23, which is in the application position, is regulated. Also 91
is a stopper which restricts both rotational limits of the cam 81 by bringing the lever 82 into contact with it, and is configured so that the restriction position can be adjusted by eccentric rotation. Further, a rider roller 92 is supported and pressed against the application roller 68 by an arm 94 that is supported by a pin 93 on the frame 22 side, and the arm 94 swings by rotating a cam 95 with a handle (not shown). It is configured to be attached to and detached from the applicator roller 68.

Next, a rotational drive mechanism between the motor 30, the blanket cylinder 23, and the forming roller 68 will be explained. A bearing 96 fixed to the frame 22 in the vicinity of the motor 30 supports one end of a clutch shaft 98, the other end of which is supported by a bracket 97 protruding from the frame 22, and meshes with the drive gear 36. A gear 99 that transmits the rotation of the motor 30 to the clutch shaft 98 is fixed thereto. Also clutch shaft 98
The electromagnetic clutch 100 is divided into a driving shaft on the gear 99 side and a driven shaft on the bracket 97 side.
A clutch gear 101 fixed to the driven shaft side meshes with a forming roller gear 102 fixed to the shaft end of the forming roller 68. Also, the shaft end of the applicator roller 68 is also connected to the gear 1.
An electromagnetic clutch 103, which will be described later, is divided into a driving shaft to which 02 is fixed and a driven shaft on the eccentric bearing 67 side.
A clutch gear 104 fixed to the drive shaft side meshes with the cylinder gear 26 of the rubber cylinder 23. FIG. 9 shows the electric circuit of the electromagnetic clutches 100 and 103, in which the electromagnetic clutch 100 with the motor 30 on the drive side is connected to a normally closed contact 105, and the electromagnetic clutch 103 with the rubber cylinder 23 on the drive side. is a normally open contact 106
It is connected to the. Further, in this circuit, a contact 108 with a relay 107 is provided which is closed during forward rotation of the blanket cylinder 23, that is, the machine. Since the contact 108 is closed while the machine is rotating forward, the electromagnetic clutch 103 is connected and the electromagnetic clutch 1 is closed.
When 00 indicates cutting and the gears 26 and 104 are engaged, the application roller 68 is rotationally driven from the blanket cylinder 23 side. Also, when the machine stops, the contact 108 opens, so the electromagnetic clutch 100 is connected, and the electromagnetic clutch 1
03 indicates cutting, and the applicator roller 68 is moved by the motor 30.
Driven from the side. Each electromagnetic clutch 100, 10
3 are respectively connected to the normally closed contact 105 and the normally open contact 106, so that both electromagnetic clutches 10
0,103 never operate at the same time. That is, in FIG. 7a, the blanket cylinder 23 is at the solid line position with respect to the forming roller 68 and the impression cylinder 11,
FIG. 7b shows the rotation transmission path in this rubber jacketed state. At this time, the electromagnetic clutch 103 that is rotating the machine is connected, so the application roller 68 is connected to the electromagnetic clutch 103 from the blanket cylinder 23 side.
is being driven through. On the other hand, although the original roller 41 and metering roller 54 are driven from the motor 30 side, since the electromagnetic clutch 100 is disconnected, this rotation is not transmitted to the other electromagnetic clutch 103 side. In addition, in FIG. 7a, the chain line position of the blanket cylinder 23 is the detached position, and if the machine is rotating at this time, it will be driven along the rotation transmission path shown in FIG. With the rotation transmission path shown in FIG. 3C, the blanket cylinder 23 is stopped, the electromagnetic clutch 103 is disconnected, the electromagnetic clutch 100 is connected, and the applicator roller 68 is driven from the motor 30 side.

The operation of the varnishing device 21 configured as above will be explained. When performing varnishing work, start the motor of the machine base, then start the motor 30 of the varnishing device 21, and rotate the cam 58 with the air cylinder 65, so that the small diameter portion 58b of the cam 58
The rollers 60 face each other, and the elastic force of the compression coil spring 63 brings the metering roller 54 into pressure contact with the original roller 41 and the applicator roller 68. At this time, the rollers 78 of the eccentric bearing 67, in which the piston rod 75 of the air cylinder 74 is extended,
The application roller 68 is in pressure contact with the blanket cylinder 23, and the blanket cylinder 23 is in the unloading position. and,
Even when the rubber cylinder 23 is in the disengaged position, the cylinder gear 26, the impression cylinder gear, and the gear 104 are not disengaged, so when the machine is rotating, the rotation is caused by the cylinder gear 2.
6. The rotation of the motor 30 is transmitted to the forming roller 68 via the gear 104 and the electromagnetic clutch 103, and the rotation of the motor 30 is transmitted to the forming roller 68 via the gear 104 and the electromagnetic clutch 103.
5, the original roller 41 and metering roller 54
It is transmitted to At this time, since the electromagnetic clutch 100 is disconnected, the rotation of the motor 30 is not transmitted to the application roller 68 side. By rotating each roller in this way, the varnish 4 in the varnish boat 42
3 is pulled up by the original roller 41, and after the film thickness is adjusted by the contact pressure of the metering roller 54, it is transferred to the forming roller 68 and circulated between it and the original roller 41. Therefore, when the paper 13 is fed onto the differential plate 14 by the paper feeder 2, the paper 13 is conveyed and the blanket cylinder 8 of the printing unit 3 is inserted into the cylinder, and the paper 13 is placed between the blanket cylinder 8 and the impression cylinder 9. After being printed in four colors, the paper 13 is sent to a varnishing unit 4. paper 1
3 reaches the varnishing unit 4, the eccentric plain bearing 25 rotates in response to a command from the timing regulating device, and the blanket cylinder 23 is inserted into the cylinder and brought into pressure contact with the impression cylinder 11 and the applicator roller 68. Therefore, the varnish circulating between the applicator roller 68 and the original roller 41 is transferred to the blanket cylinder 23 and applied to the paper 13 conveyed between the blanket cylinder 23 and the impression cylinder 11. The varnished paper 13 is conveyed by a paper discharge chain 19 and stacked on a paper stacking table 20. And this rubber cylinder 23
Since the machine is rotating even when the blanket cylinder is inserted, the rotation transmission path is the same as when the blanket cylinder is removed and the machine rotates.

After completing the varnishing work in this way,
When paper feeding is stopped to replace the paper stacking table 20 of the paper ejecting device 5 with an empty one, or to adjust the insole of the blanket by changing the paper size or sinking the blanket, the printing unit At the same time as the rubber cylinder 8 of No. 3 is removed, the varnishing device 21
The blanket cylinder 23 is also removed from the impression cylinder 11 and the forming roller 68. At this time, the body gear 26 and the gear 104 are slightly meshed, and the motor 30 continues to rotate, so the applicator roller 68 continues to be driven from the blanket cylinder 23 side via the electromagnetic clutch 103. Further, since the original roller 41 and the metering roller 54 are driven from the motor 30 side and continue to rotate, the varnish 43 circulates between the varnish boat 42 and the application roller 68 and does not harden. When adjusting the insole of the rubber cylinder 23, the machine is stopped, the rubber cylinder 23 is washed, and then the insole is adjusted. In this case, the motor 3 is connected from the original roller 41 to which the electromagnetic clutch 100 is connected to the application roller 68.
Since it is driven and rotated from the zero side, the varnish will not solidify. After adjusting the insole, when the air cylinder 84 is actuated to extend the piston 85, the cam 81 rotates approximately 90 degrees counterclockwise in FIG. Since the rotational force is applied, the roller 78 rotates until it comes into pressure contact with the small diameter portion 81b of the cam 81. Therefore, the applicator roller 68 comes into contact with the blanket cylinder 23 which is in the removed position, and the circulating varnish is transferred to the blanket cylinder 23. In this case, the body gear 26 and the gear 104 are in mesh with each other, and even if the blanket cylinder 23 is removed, as long as the impression cylinder is rotating, the blanket cylinder 23 is rotated by the mesh with the body gear 26, so that the application roller 68 is not in contact with the rubber. Electromagnetic clutch 103 from the body 23 side
Rotationally driven through. After that, when paper feeding is restarted and the paper 13 reaches the blanket cylinder 23, both air cylinders 74 and 65 are activated by a command from the timing regulating device.
operates at a predetermined timing, and the roller 78 moves to the cam 8.
1 and the rubber cylinder 2
3 is placed in the body. Therefore, the applicator roller 68 is pressed against the blanket cylinder 23 by the contact pressure set by the cams 81 and 78, and returns to the varnishing state before paper feeding is stopped. Note that when cleaning the application roller 68 and the blanket cylinder 23 at the same time, the blanket cylinder 2 at the position where the blanket is removed is
3, the machine is rotated with the application roller 68 in the application state, so the application roller 68 is driven from the blanket cylinder 23 side. Furthermore, when cleaning the blanket cylinder 23 by hand, the machine is stopped after the blanket cylinder 23 is removed, and the applicator roller 68 is disengaged from the blanket cylinder 23. 3
Driven from the 0 side.

Note that the arrangement of the rollers is not limited to this embodiment, and as long as the blanket cylinder and the applicator roller are rotated synchronously, for example, the applicator roller 68 and the base roller 41 can be placed in opposition to each other, and the metering roller can be used. The same effect can be achieved by arranging the rollers such that the rollers 54 are brought into contact only with the original roller 41. Furthermore, the rotational direction of each roller is not limited to that of this embodiment.

〔Effect of the invention〕

As is clear from the above description, in the printed matter varnishing apparatus according to the present invention, the blanket cylinder and the application roller are synchronized and rotationally driven by the main drive source, and the roller upstream of the application roller for varnish transfer is An electromagnetic clutch is installed between the blanket cylinder and the forming roller, and between the sub-driving source and the forming roller, and is controlled by a control device so that both do not operate at the same time. The sub-drive source and the electromagnetic clutch between the forming roller are installed closer to the forming roller than the original roller rotating in the varnish container, and when the blanket cylinder rotates, the electromagnetic clutch between the blanket cylinder and forming roller is connected to the forming roller. By configuring the applicator to be connected so that the applicator roller is driven from the blanket cylinder side, the applicator roller can be driven to rotate with an extremely high level of safety without risk of damage, regardless of whether the blanket cylinder or applicator roller is attached or removed. can do. Therefore, in addition to varnishing work,
The work of applying varnish to each roller when the blanket cylinder is removed and the applicator roller is removed, and the work of checking the varnishing status when the blanket cylinder is removed and the applicator roller is attached can be performed safely and without causing uneven rotation between the blanket cylinder and the applicator roller. This eliminates unevenness in the varnish film thickness and improves the quality of printed matter, and varnishing during rest prevents the varnish from solidifying and accelerates the start-up when varnishing starts. By checking varnishing in the blanked state, it is possible to reduce the amount of paper waste and improve work efficiency. Further, the device can be provided at a low cost, maintenance work can be reduced, and accidents due to malfunction can be prevented.

[Brief explanation of drawings]

1 to 9 show an embodiment of the printed matter varnishing apparatus according to the present invention, FIG. 1 is a schematic side view of a four-color sheet-fed rotary printing press in which this is implemented, and FIG. Fig. 3 is a side view of the varnishing device, Fig. 4 is a developed cross-sectional view of the area near the blanket cylinder and forming roller, and Fig. 5 is a schematic side view of the printing unit and varnishing unit. 6 is a side view of the corresponding location in FIG. 3 seen from the outside of the frame in order to explain the attachment/detachment device for each roller, FIG. 7 is an explanatory diagram of the roller rotation drive, and FIG.
The figure is a schematic configuration diagram of the roller rotation drive device, and FIG. 9 is an electric circuit diagram of the electromagnetic clutch. 13...paper, 21...varnishing device, 23...
Rubber cylinder, 26...Body gear, 30...Motor, 41
... Former Laura, 42 ... Nisfune, 43 ... Niss,
54...Measuring roller, 68...Applying roller, 10
0,103...Electromagnetic clutch.

Claims (1)

[Claims] 1. A blanket cylinder to which the conveyed printed paper is attached and a coating roller that contacts the blanket cylinder and transfers varnish to the circumferential surface of the blanket cylinder are synchronized and driven to rotate by a main drive source, and the coating roller is upstream of the coating roller for varnish transfer. The side rollers are rotationally driven by an auxiliary drive source whose rotational speed can be changed, and a control device is used between the blanket cylinder and the forming roller and between the auxiliary driving source and the forming roller so that both do not operate at the same time. Of these, the rubber cylinder,
An electromagnetic clutch between the applicator rollers is provided closer to the applicator roller than the original roller rotating in the varnish container, and when the blanket cylinder rotates, the electromagnetic clutch between the blanket cylinder and the applicator roller is connected so that the applicator roller is connected to the applicator roller. A printed matter varnishing device, characterized in that it is configured to be driven from the side.