JPH0211427B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a printing plate changing device.

There are generally two types of printing units in paper processing machines: top printing and bottom printing.In both cases, the conventional top printing shown in Figure 1 is used to attach and remove the printing plate sheet from the printing cylinder. As in the example of this method, the printing section 2 and paper feeding section 2a are separated from the paper discharging section 1, space is secured for attaching the printing plate sheet 3 to the printing cylinder 4, and then everything is done manually. It's been coming. The outline of the work procedure is as follows.

First, the installation work of the printing plate sheet 3 will be explained. It is inserted into the mounting groove S of the printing cylinder 4 shown, and the front end of the printing plate sheet 3 is mounted on the printing cylinder 4.

(a) Next, operate the push button switch (not shown) to rotate the printing cylinder 4 in the direction of the arrow.

(c) Next, wrap the printing plate sheet 3 around the printing cylinder 4 with one hand.

(D) Next, fit the trailing plate 7 of the printing plate sheet 3 into the groove e of the printing cylinder 4 (FIG. 3A).

(E) Further turn the tightening shaft 8 in the direction of the arrow as shown in FIG. It is finally tightened by 9 and claw 10. Note that 5 in FIG. 2 is a printing plate.

Next, the operation for removing the printing plate sheet 3 will be explained.

(A) First, remove the pawl 10 from the engaged pawl wheel 9 as shown in Figure 3B.

(a) Next, turn the tightening shaft 8 in the opposite direction of the arrow to loosen the printing plate sheet 3 (the state shown in Fig. 3a), and remove the back stop plate 7.

(c) Next, while turning the printing cylinder 4 in the opposite direction to the arrow in FIG. 1, unwind the printing plate sheet 3 from the rear side.

(d) Furthermore, remove the front stop plate 6 from the groove S of the printing cylinder 4, and remove the printing plate sheet 3.

However, the conventional methods described above generally have the following drawbacks. That is, in preparation for replacing the printing plate sheet 3, the paper discharge section 1 shown in FIG.
Therefore, it was necessary to move the printing section 2 and paper feeding section 2a from the chain line position to the solid line position. In addition, the printing plate sheet 3 had to be replaced entirely by hand, and it was also necessary to return the freed printing section 2 and paper feeding section 2a to the chain line positions as described above, so a large amount of work was required before restarting operation. The drawback was that it required effort and time.

The present invention has been proposed in order to solve the above-mentioned conventional drawbacks, and includes a plurality of stop bars that fix one end of the printing plate through a groove and a nail plate for preventing falling off, and suspend the other end. It is held so that it can be moved horizontally in sequence,
The cylinder has a frame supported by a unit box, and a cylinder having a support rod attached to the frame and having a protrusion that can be fitted into the groove of the stopper rod and is movable up and down at the tip of the rod. a printing preset device disposed at the bottom of the cylinder; a rotatable eccentric bushing supporting a receiving roll disposed parallel to the printing cylinder at the bottom; and a rotatable eccentric bushing rotatably mounted on the eccentric bushing; A mark having a carrier arm that has a protrusion that fits into the groove of the stopper rod, and receives the stopper held by the support rod at the end of its upward stroke by rotating, and delivers it to the groove of the printing cylinder. By providing an automatic plate mounting/removal device, the time required for set-up can be greatly shortened, thereby increasing productivity, saving labor, and improving safety. be.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 shows a schematic configuration of a first embodiment in which the present invention is implemented in a top printing type printing section. The apparatus shown in FIG. 4 is composed of a printing plate presetting device 12 and a printing plate automatic attachment/removal device 13.
Unit box 1 with built-in printing plate preset device 12
5 has casters 14 attached to the four corners of its lower surface, making it movable.

Furthermore, two rails 16, 16 are fixed to the inner surface of the upper part of the unit box 15, and a frame 18
is suspended and supported by cam followers 17, 17' held between the upper and lower rails 16, 16. Further, the frame 18 is connected to a cylinder 19 fixed to the unit box 15, and a cylinder 20 is further fixed on the frame 18.

Further, as shown in FIG. 6, the sprocket wheel 21 provided on the side surface of the one-way clutch 43 mounted coaxially with the cam follower 17 is connected to a sprocket wheel 21' rotatably mounted on the lower part of the frame 18. and are connected by a chain 22. Also, the sprocket wheels 23, 2
3' are both rotatably supported on the upper part of the frame 18 coaxially with the cam followers 17, 17';
They are connected by a conveyor chain 24.

Furthermore, as shown in FIGS. 4 and 5, frame 1
The tip of the support rod 64 attached to the tip of the rod of the cylinder 46 fixed to the cylinder 8 has a protrusion k that fits into a groove h provided in the stopper rod 39. Further, the groove h of the stop rod 39 positioned at the uppermost end of the sprocket 23 is on the extension line of the protrusion k of the support rod 64. Therefore, by the vertical movement of the support rod 64, the groove h and the protrusion k fit together, and the groove h
It can be vertically moved integrally with the support rod 64 without changing its position.

On the other hand, as shown in FIG. 7, the trailing plate 7 of the printing plate sheet 3 is fitted into a groove g provided parallel to the axis of the retaining rod 39, and is held by a claw plate 45 so as not to fall off. There is. And as shown in Figure 8,
The protrusion i of the special attachment 44 provided on the conveyor chain 24 and the groove h provided parallel to the axis of the stop bar 39 are designed to fit into each other, and as a result, the suspension is suspended as shown in FIG. The position of the groove h of the stop rod 39 is the same as that of the conveyor chain 2.
This prevents it from shifting due to the movement of 4. Also 2
5 is the piston rod, the same rod 25 and chain 2
2 are connected at point a so that the chain 22 can be moved by the operation of the cylinder 20.

Next, the printing plate attachment/removal device 13 consists of a carrier arm 26, a gear 27, a link 28, a cylinder 29, etc., the details of which are shown in FIGS. 9 and 10. FIG. 10 shows a sectional view taken along line C-C in FIG. 9. In FIG. 10, the printing cylinder 4 is rotatably supported between frames 47 and 47', and a gear 48 is connected to the end of the shaft. gear 48
A gear 49 meshing with the frame 47 is connected via a clutch 50 to a motor 51, which is fixed on the frame 47' by a base plate 52.
Further, a pulse transmitter 53 is attached to one end of the printing cylinder 4 for detecting the rotation angle.

Furthermore, a groove 54 is provided on the outer periphery of the printing cylinder 4, and an inner cylinder 55 is arranged at the bottom of the groove 54.
They fit together so that they can rotate around point 0 in FIG. There are recesses at several locations in the longitudinal direction on the inner surface of the inner cylinder 55, into which the spring 40 is fitted. Furthermore, fan gears 32 are cut into flanges on both end faces of the cylinder 55. As shown in FIG. 9, a rotary cylinder 37 is mounted so that the gear 36 is positioned so as to mesh with the sector gear 32.

Further, a spring seat 33 is provided on the side surface of the sector gear 32.
A pawl 34, which can rotate about the 0' point on the sector gear 32, is attached with a spring 35 in between. Reference numeral 38 denotes a cylinder, and the cylinder 38 is fixed to the side surface of the printing cylinder 4 so that the tip of the piston rod contacts the claw 34. Note that these structures are provided on both sides of the printing cylinder 4.

Furthermore, as shown in FIG. 10, a receiving roll 30 is mounted parallel to the printing cylinder 4 between frames 47 and 47', and is rotatably mounted on an eccentric bush 5.
6,56'. The eccentric bushes 56, 56' are rotatably attached to the frames 47, 4.
7' is installed. Further, a gear 57 is coupled to the shaft end of the receiving roll 30, and the gear further meshes with the gear 48.

The eccentric bushes 56, 56' have fan-shaped gears 58,
58' is toothed, and the fan-shaped gears 58, 5
8' meshes with pinions 60, 60' provided on a pinion shaft 59 that is mounted parallel to the receiving roll 30. Further, the shaft end of the pinion shaft 59 is connected to a motor 61, and the motor 61 is fixed onto the frame 47' by a base plate 62.

On the other hand, the carrier arms 26, 26', which are rotatably provided on the eccentric bushes 56, 56', are provided with teeth on about half the circumference thereof, and the gears 27, 27, 27' are positioned so as to mesh with the teeth. 27' is rotatably mounted on the frames 47, 47'. Both gears 27, 27' are connected to a shaft 65 provided parallel to the pinion shaft 59. Furthermore, the gear 27' provided on the frame 47' has a protrusion t on its outer periphery and is connected to a cylinder 29 via a link 28, and the cylinder 29 is further connected to a mounting seat 63.
is fixed onto the frame 47' by.

Next, to explain the operation, Fig. 4 shows a unit box 15 in which three groups of printing plate sheets are preset by hanging from the conveyor chain 24 in the required number and order of use outside the machine.
This figure shows the state when the printing plate sheet 3 on the rightmost side is moved to a position where it can be fitted into the carrier arm 26 after being fixed in the machine. This movement is achieved by operating a push button switch (not shown).
This is done by operating the cylinder 19 in the direction in which its piston rod retracts.

Further, subsequent printing plate sheets 3 are sequentially fed in the following order. That is, by operating the cylinder 20 in the direction in which its piston rod 25 protrudes by operating a push button switch (not shown), the chain 22 is activated.
When driven, the sprocket wheel 21 fixed to the one-way clutch 43 rotates, and the sprocket wheel 23 mounted on the same axis is also rotated at the same time, driving the conveyor chain 24 and rotating the sprocket wheel 21 fixed to the one-way clutch 43. One-way clutch 43 is actuated and locked.

Next, when the cylinder 20 is actuated in the direction in which the piston rod 25 is retracted, the conveyor chain 24 remains stopped and the chain 22 moves toward the piston rod 2.
5, and thereafter the printing plate sheet 3 is sequentially fed by repeating this action.

Next, in FIG. 11, in order to move the stopper bar 39 of the printing plate sheet 3 set on the preset device 12 to a position where it can fit into the carrier arm 26 (indicated by the two-dot chain line in FIG. 11A), When the cylinder 46 provided on the preset device 12 is actuated to raise the support rod 64, the protrusion k provided at the tip fits into the groove h of the stopper rod 39, thereby changing the position during the ascent. move without In addition, the 11th
Figure A shows the state when the stopper rod 39 and the support rod 64 are fitted.

In FIG. 11B, the support rod 64 reaches the stroke end, the gear 27' rotates via the link 28 due to the operation of the cylinder 29, not shown in FIG. 11, and the carrier arm 26 further rotates in the direction of the arrow. , the protrusion l of the carrier arm 26 is connected to the stop bar 39.
This shows the state when it is fitted into the groove h. As a result, the stop rod 39 is prevented from shifting during rotation of the carrier arm 26.

FIG. 11C shows the state when the stop rod 39 reaches the groove 54 of the printing cylinder 4, which was previously in the standby position, due to the rotation of the carrier arm 26. On the other hand, the support rod 64, which has delivered the stop rod 39 to the carrier arm 26, is lowered to a standby position (the position shown by the solid line in FIG. 11C) by the operation of the cylinder 46.

When the clutch 50 shown in FIG. 10 is connected and the upper motor 51 is operated in the state shown in FIG. Press the spring 40 provided at 54 to fit it. This state is the 12th
Shown in Figure A. At this time, the cylinder 38 shown in FIG.
When the piston rod is operated in the direction of retraction,
The pawl 34 fits into the groove f of the stopper bar 39 and is prevented from coming out by the pushing force of the spring 35, thereby fixing the stopper bar 39 in the groove portion 54.

On the other hand, since the printing plate 5 cannot pass through the gap between the printing cylinder 4 and the receiving roll 30 shown in FIG. 12A, the motor 61 shown in FIG. The receiving roll 30 is lowered from the position indicated by the two-dot chain line shown in FIG. Further, the carrier arm 26 that has delivered the stopper bar 39 onto the printing cylinder 4 is moved by the pulling action of the cylinder 29.
It rotates via the gear 27 and the eccentric bush 56 to the standby position shown in FIG. 12B and stops.

Further, in FIG. 12C, when the front stop plate 6 of the printing plate sheet 3 reaches the center line between the printing cylinder 4 and the receiving roll 30, the motor 51 (FIG. 10) stops;
Clutch 50 is disengaged.

Next, the receiving roll 30, which was at the position shown by the solid line in FIG. 12B, is raised again by the operation of the motor 61 and reaches the position shown by the solid line in FIG. 12C. As a result, the front stop plate 6 fits into the groove d provided on the circumference of the printing cylinder 4.

Next, when the rotary cylinder 37 shown in FIG. 9 operates, the fan-shaped gear 32 rotates via the gear 36, and the inner cylinder 55 (FIG. 10) also rotates in the direction of the arrow, causing the front stop plate 6 to rotate. While bringing it into close contact with the groove d of the printing cylinder 4, applying tension to the printing plate sheet 3,
Further, the stopper bar 39 is fixed so as to be wrapped around the inner cylinder 55. The state is shown in FIG. 12D.

Next, the operation for removing the printing plate sheet 3 will be explained. First, the clutch 50 shown in FIG. 10 is reconnected and the motor 51 is operated, so that the groove 54 of the printing cylinder 4 is moved to the position shown in FIG. 13A. Move until you reach it and stop.

In this state, the rotary cylinder 37 operates again, and the sector gear 32 rotates in the direction of the arrow, so that the tension on the printing plate sheet 3 is loosened, and the stop bar 39 is pushed by the spring 40 provided on the inner surface of the inner cylinder 55. Due to the force, it is ejected from the groove portion 54 to the saucer 41.

Next, the motor 51 operates again, and the printing cylinder 4
As the printing plate sheet 3 rotates in the direction of the arrow, the printing plate sheet 3 is collected into the tray 41 (FIG. 13B), and when the difference portion 54 of the printing cylinder 4 reaches the position shown in FIG. When the collection is completed, the motor 51 is stopped and the clutch 50 is disengaged.

FIG. 14 shows a second embodiment, in which a printing plate sheet presetting device 12 and a printing plate automatic mounting/removal device 13 are shown.
A unit box 15 containing a unit box 15 is fixed in each of the printing units 2, 2 which are arranged in parallel between the paper discharge unit 1 and the paper feed unit 2a. According to this embodiment, since the unit box is not pulled out, the free floor space of the factory where the machine is installed is reduced, and there is no need for a sandwich conveyor between the units, which reduces setup time and improves safety. can be improved.

Since the present invention is configured as described in detail above, compared to the conventional manual method, it is not necessary to open the frames of the printing section and paper feeding section to take up space each time a printing plate is replaced, and The printing plate sheet can be preset and the printing sheet can be automatically attached to and removed from the printing cylinder, which greatly reduces the time required for setup, which increases productivity, saves labor, and improves safety. Can be done.

[Brief explanation of drawings]

Figure 1 is a side view of the top printing method in the printing section of a conventional paper processing machine, Figure 2 is a perspective view of a printing sheet with front and rear stop plates attached, and Figures 3A and 3B are views of the printing cylinder in Figure 1. FIG. 4 is a side view of a printing plate exchange device showing an embodiment of the present invention; FIG. 5 is a sectional view taken from A to A in FIG. 4; FIG. 6 is a cross-sectional view taken from B in FIG. 4. ~B sectional view, FIG. 7 is an enlarged perspective view of the stopper bar in FIG. 4 and the printed sheet attached to it, FIG. 8 is a detailed view of the main part in FIG. 4, and FIG.
The figure is an enlarged view of the main parts in Figure 4 and D in Figure 10.
〜D sectional view, FIG. 10 is a C-C sectional view of FIG. 9,
Figure 11 A, B, C, Figure 12 A, B, H, D,
13A, 13B and 13C are side views and 1
FIG. 4 is a side view of the apparatus showing a different embodiment from FIG. Explanation of the main parts of the figure, 3...Print sheet (print plate), 4...Printing cylinder, 6...Front stop plate, 7...
...Rear stop plate, 15...Unit box, g...Groove, 2
6... Carrier arm (arm), 34... Claw (print plate attachment/removal means), 39... Stopping bar, 45... Claw plate (holding member for preventing falling off), 54... Groove, 56...
Eccentric button (printing plate attachment/detachment means).

Claims (1)

[Claims] 1 One end of the printing plate is fixed through a groove and a nail plate for preventing falling off, and the other end is suspended to hold a plurality of stop bars that can be horizontally moved in sequence, and a frame supported by a unit box. , a cylinder which is attached to the same frame and has a supporting rod at its tip that can be moved up and down, and which has a protrusion that can be fitted into the groove of the stopper rod, and which is disposed at the bottom of the printing cylinder. The presetting device includes a rotatable eccentric bushing that supports the receiving roll and is provided at the bottom of the printing cylinder in parallel with the printing cylinder, and a protrusion that is rotatably provided on the eccentric bushing and that fits into the groove of the stopper rod. an automatic plate mounting/dismounting device having a carrier arm which rotates to receive the stop bar held by the support bar at the end of its upward stroke and delivers it to the groove of the printing cylinder; A printing plate exchange device featuring: