JPH0139558Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for positioning and fixing a movable inker, which is provided in a printing press so as to be movable in a direction relative to a printing unit, relative to a printing cylinder.

In a printing machine such as a dry offset printing machine that is equipped with multiple color inking devices for one printing unit, the inker unit is generally configured by housing the multiple color inking devices in a frame.
A mobile type inker that can move in the direction of distance from and near the printing unit is often used.

FIG. 1a is a schematic side view of a conventional mobile inker of this type, and FIG. 1b is a front view of the main part of FIG. 2 is equipped with a bed 3 extending on the floor, and above the bed 3 are ink devices for three colors corresponding to each plate cylinder 1 and an ink frame 4 that houses the ink devices.
A movable inker 5 consisting of a plurality of rollers 6 connected by bars to both left and right ends of the bed 3
It is mounted so as to be movable in the direction of arrow B via the arrow B. Then, before printing, the inker 5 is separated from the printing unit 2 to perform plate conversion and ink roller positioning, and then the inker 5 is moved toward the printing unit 2 and positioned. After fixing it, start printing.

However, in the conventional positioning and fixing device for the movable inker 5, as shown in the figure, after the inker 5 is pushed toward the printing unit 2 and brought into contact with the reference surface,
Since the L-shaped bracket 7 pivotally mounted on the side of the bed 3 was raised from the chain line position to the solid line position and the bolt 8 was tightened, the bed 3 and the inca unit 4 were fixed in tension. Not only are there many operations and it takes a long time to position and fix, but the fixing force is weak because it is fixed only by applying the screw force of port 8 as surface pressure on the reference surface.
Furthermore, it does not work effectively against movements in the left and right directions, which causes printing problems such as shot marks.

The present invention was developed in view of the above points.A fluid cylinder is attached to the frame of the printing unit, and a taper collar is fixed to the working end of the piston rod, and a U-shaped groove and a U-shaped groove are installed in the frame of the movable inker. A guide plate with a tapered hole at the bottom is fixed, and the U-shaped groove and the piston rod are engaged by moving the movable inker, and then the taper collar and the taper hole are fitted by contraction of the piston rod by a fluid cylinder. By configuring the mobile inker to be positioned and fixed with respect to the printing unit using the same method, it is possible to easily and quickly fix the mobile inker in each direction with high precision. A positioning and fixing device is provided. Embodiments of the present invention will be described in detail below with reference to the drawings.

This embodiment shows an example in which the present invention is applied to a dry offset intaglio printing press. Fig. 2 is a schematic side view of the printing press in which this invention is applied, Fig. 3 is a side view of the vicinity of the moving inker, and Fig. 4 5 is a side view of the positioning and fixing device, FIG. 5 is a plan view, and FIG. 6 is a perspective view. In the figure, a printing machine 11 is a paper feeder 1
2, a printing device 13, and a paper ejecting device 14, and paper 16 is stacked on a paper stacking table 15 of the paper feeding device 12. The printing device 13 also includes a quadruple diameter impression cylinder 1 that prints on four sheets of paper 16 per rotation.
7. A blanket cylinder 18 and an intaglio cylinder 19 are arranged so that the lines connecting their axes are substantially perpendicular to each other.
1, and transfer cylinders 22, 23 are provided.
Four dry plate cylinders 24 each having a plate attached to its circumferential surface are placed in contact with the blanket cylinder 18, and below the difference plate 20, four different colors of ink are applied to each dry plate cylinder 24. Mobile Inca 25 to supply (described later)
is provided. Further, three ink forming rollers 26 are in contact with the intaglio surface mounted on the circumferential surface of the intaglio cylinder 19, and a movable inker 27 (described later) is provided on the paper discharge side thereof. Further, 28 is a wimping roller for wiping off excess ink adhering to the intaglio surface. Furthermore, a sprocket 29 provided diagonally above the impression cylinder 17 and a paper ejecting device 14
Between the sprocket 30 and the printed paper 26
A paper ejection chain 31 that conveys the paper is stretched,
Two sets of paper stacking tables 32 and 33 are arranged below the conveyance terminal end to alternately stack predetermined amounts of paper 26 released and falling from the paper discharge chain 31.

The printing unit 34 of the printing device 13 includes a bed 35 extending on the floor and a frame 36 placed and fixed thereon, and the movable inker 25 has a plurality of rollers 37 on the bed 35. It is placed through the printing unit 34, and is provided so as to be able to move forward and backward with respect to the printing unit 34. inca 25
Four color inking devices 41 (only one color is shown) each consisting of an ink pot 39 and a roller group 40 are housed in the frame 38 corresponding to each dry plate cylinder 24 .

Then, the inker 25 for the printing unit 34
The positioning and fixing device includes a pair of upper and lower hydraulic cylinders 42 provided on the printing unit 34 side, and a pair of upper and lower guide plates 43 provided on the inker 25 side corresponding to the hydraulic cylinders 42. Each of the hydraulic cylinders 42 is mounted on the inner end of the frame 36 with the direction of movement of its piston rod 44 perpendicular to the direction of movement of the ink 25, and the piston rod 44 penetrates the frame 36 and projects outward. has been done. piston rod 4
A taper collar 45 having a truncated conical shape is fitted into the working end of the nut 46 and the washer 47.
It is configured to move forward and backward together with the piston rod 44 between the solid line position and the chain line position in FIG. 5 by the operation of the hydraulic cylinder 42. Further, the guide plate 43 is fixed to the outer end of the frame 38 on the side of the inker 25 with bolts 48 corresponding to each hydraulic cylinder 42, and has an opening toward the piston rod 44 to prevent movement of the inker 25. A U-shaped groove 49 is thus provided which engages the piston rod 44. A taper hole 50 having the same taper as the taper collar 45 and fitting therein is provided at the bottom of the U-shaped groove 49, and the guide plate 43 is moved in the direction of the arrow in FIGS. 4 and 5. By moving the piston rod 44 to the position where the U-shaped groove 49 engages with the piston rod 44, the piston rod 44 is contracted, thereby opening the taper collar 45 and the taper hole 50.
The frame 36 and the frame 38 are configured to be fixed by being fitted together.

Furthermore, in the inker 27 on the side of the intaglio cylinder 19,
A three-color inking device consisting of an ink fountain 51 and a group of rollers is housed in a frame 52, and the same positioning and fixing device as that on the inker 25 side is also provided between the inker 27 and the printing unit 34. ing.

In the printing machine configured as described above, when the piston rod 44 of the hydraulic cylinder 42 is extended prior to printing, the engagement between the taper collar 45 and the taper hole 50 is released at the chain line position in FIG. 25 and 27 are moved away from the printing unit 34, and the dry plate cylinder 24,
The plate of the intaglio cylinder 19 is replaced and the ink roller is adjusted. When the inkers 25 and 27 are moved toward the printing unit 34, the U-shaped groove 49 of the guide plate 43 and the piston rod 44 of the hydraulic cylinder 42 engage with each other, so that the piston rod 44 moves into the U-shaped groove 4.
Push in the inkers 25 and 27 until they come into contact with the bottom surface of 9. Then, when the piston rod 44 of the hydraulic cylinder 42 is contracted, the taper collar 45 enters the taper collar hole 50 and is fitted into it, causing the flange 3
6 and the frame 38 are combined to form the inca 25, 2
7 is positioned and fixed to the printing unit 34. In this case, the positioning of the inkers 25 and 27 is as follows:
This is done by fitting the taper collar 45 and the taper hole 50, so that it is positioned with extremely high accuracy in three directions, up, down, front and back, and left and right, and is extremely firmly fixed by hydraulic pressure.

When the machine is started after positioning and fixing the inkers 25 and 27 in this way, the paper 16 stacked on the paper stacking table 15 is sent out one by one onto the difference plate 27 by the paper feeder 12, and is swung. The material is supplied to the impression cylinder 17 by changing the grip between the device 21 and the transfer cylinders 22 and 23. Then, the paper 16 that is conveyed while being gripped by the claws of the impression cylinder 17 is subjected to four-color dry offset printing when it passes between the blanket cylinder 18 and the concave plate cylinder 19. 3 when passing
Colored intaglio prints are printed on the same side. After printing, the paper 16 is conveyed by a paper discharge chain 31, and is released from the paper discharge chain 31 at the end of the conveyance and transferred to a paper stacking table 32,
33 and are alternately switched and loaded in predetermined amounts. In this kind of printing work, inker 2
5 and 27 are positioned with high precision, the centering accuracy of the ink forming roller with respect to the dry plate cylinder 24 and the centering accuracy of the ink roller with respect to the ink forming roller 26 on the intaglio cylinder 19 side are ensured, and the ink forming roller is positioned with high precision. 25 and 27 are firmly positioned and fixed with high precision, the roller nip pressure is reduced to the dry plate cylinder 2.
4 or the plate surface of the intaglio cylinder 19, no vibration is generated.

Although this embodiment shows an example in which the present invention is applied to a dry offset intaglio printing press, the present invention can be similarly applied to any printing press equipped with a moving inker. Further, as the fluid cylinder for moving the taper collar 45, an air cylinder may be used instead of the hydraulic cylinder.

As is clear from the above explanation, according to the present invention, in a positioning device for a movable inker in a printing press, a fluid cylinder is attached to the frame of the printing unit, a taper collar is fixed to the working end of the piston rod, and the inker is movable. A guide plate with a U-shaped groove and a tapered hole at the bottom is fixed to the mold inker, and the U-shaped groove and the piston rod are engaged by movement of the movable inker, and then the taper collar is formed by contraction of the piston rod by the fluid cylinder. By fitting the movable inker with the tapered hole to position and fix the movable inker to the printing unit, the movable inker can be extremely high in the vertical, longitudinal, and horizontal directions by fitting the tapered surfaces. Since it is precisely positioned and firmly fixed, the centering accuracy of the roller with respect to the plate surface is improved, and vibration of the machine can be prevented, resulting in a marked improvement in printing performance. Further, by using a fluid cylinder, remote control becomes possible, which makes the operation easier than conventional manual operation, and the operation time can be significantly shortened.

[Brief explanation of the drawing]

Fig. 1 is a side view of a movable inker and a front view as seen from A of its main parts for explaining a conventional positioning and fixing device for a movable inker, and Figs.
The figure shows an embodiment of the positioning and fixing device for a movable inker in a printing press according to the present invention, FIG. 2 is a schematic side view of a dry offset intaglio printing machine in which this is implemented, and FIG. Side view,
FIG. 4 is a side view of the positioning and fixing device, FIG. 5 is a plan view thereof, and FIG. 6 is a perspective view thereof. 11...Printing machine, 25, 27...Mobile inker, 34...Printing unit, 36...Frame,
38...Frame, 42...Hydraulic cylinder, 43
...Guidance board, 44...Piston rod, 45...
Taper collar, 49...U-shaped groove, 50...Tapered hole.

Claims (1)

[Scope of utility model registration request] In a printing press equipped with a mobile inker that can move forward and backward with respect to a printing unit, the fluid cylinder is mounted on a frame of the printing unit so that the direction of movement of the piston rod is perpendicular to the direction of movement of the movable inker; A guide plate fixed to the frame of the movable type inker, comprising a tapered collar fixed to the working end of the piston rod, and a U-shaped groove opening toward the piston rod and engaging with the piston rod, the guide plate being fixed to the frame of the movable type inker and moving back and forth after engagement. 1. A device for positioning and fixing a movable inker in a printing press, comprising: a guide plate having a taper hole at the bottom of the U-shaped groove that fits into the taper collar integral with the piston rod.