JPS63118255A - Plate lock up device of sheet-fed rotary press - Google Patents

Abstract

PURPOSE:To perform the zero setting of a vise and a fine adjustment screw by quick operation through the separation of a plate sticking roll and the fine adjustment screw, by a method wherein the rolls pivotally mounted to the vise on a tail side are each opposed to and contacted with the cam surface of each of some cams, which are fixed to the slide bar provided so as to extend along the tail side wall surface of the plate in a freely advancing and retracting manner, side by side and the leading end of each of a plurality of the bolts screwed is opposed to and contacted with the cam surface of each of the remaining cams not opposed to an contacted with the rolls. CONSTITUTION:In the clamping of a plate, when a plate clamping pin 37 is revolved by about 200 deg. in a clockwise direction, an eccentric pin 37b revolves around the axial core F of the pin 37 while moving the roll 38 engaging with the pin 37b through a U-shaped groove to the left and, as a result, a slide bar 28 moves and each of the rolls 31 contacted with the lower parts of cams 29 is opposed relation thereto rises along the inclined surface of each cam 29 to be contacted with the high plane thereof in opposed relation thereto and all of the rolls 31 together move to the side of the vise 4 on a gripper side and a plate 14 is pulled to be closely contacted with the peripheral surface of a plate cylinder 1. When the plate 14 is distorted or the clamping thereof is insufficient as a whole, fine adjustment screws 35 are individually tightened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a plate vise device for gripping and holding both ends of a printing plate mounted on a plate cylinder in a sheet-fed rotary printing press.

[Conventional technology]

When a printing plate for printing (hereinafter referred to as a plate) is attached to the peripheral surface of a plate cylinder of a sheet-fed rotary printing press, one of the pair of plate vises provided in the outer peripheral notch of the plate cylinder is Hold one end of the plate in a plate vise on the grip side that leads in the direction of rotation, wrap the plate around the circumference of the cylinder, and then place the other end of the plate in a plate vise on the rear side that lags in the direction of rotation of the cylinder. This is done by holding the person in their mouth.

After the plate is held in the butt side plate vise, the plate must be tightened by pulling the plate vise in the circumferential direction of the body so that the plate comes into close contact with the circumferential surface of the body. Conventionally, the following structure has been generally adopted. The vise on the butt side has multiple bolts with their tips cut out and in contact with the wall surface, and by rotating these bolts, the vise with the plate in its mouth can be removed. The plate is tightened by pulling it away from the notch surface using the screw action. However, in this case, the same operation must be repeated for several bolts parallel to each other in the width direction of the plate, and in order to ensure that the plate tightening is evened out in the width direction of the plate,
I had to tighten it little by little and move on to the next one, over and over again. Moreover, since it is difficult to hold a rigid plate under considerable tension, it takes a considerable amount of time to tighten the bolts, so this plate tightening operation conventionally required an extremely large amount of time and effort.

When replacing the plate, the operation of loosening many bolts must be repeated even when removing the used plate, and the time required to loosen and tighten the plate is the same as the time required to replace the plate. Since the proportion of the paper stock is extremely large, there is a need for improvements in the preparation time, as it has become necessary to shorten the preparation time due to the recent diversification of printed matter and the trend towards smaller batches.

Therefore, the applicant of the present invention developed a plate vise device using a cam in order to facilitate the exchange of plates, and the device was disclosed in Japanese Patent Application Laid-Open No. 59-67055. In this system, a plurality of cams each having a cam surface that is raised and lowered in the direction of extension are fixed in parallel to a slide bar extending along the side wall surface of the bottom side of the body circumferential notch. A plurality of bolts are screwed into the cam surface of the cam so that they can move forward and backward with their tips facing each other from a right angle direction. Then, when installing the plate, hold one end of the plate in the side plate vise and wrap it around the barrel surface.
After holding the other end in the butt side vise, when the slide bar is moved forward and backward, all the bolt contact points move from the lower position to the higher position on the cam surface and are tightened, so many bolts can be tightened. Installation of the plate is completed without tightening.

[Problem that the invention seeks to solve]

In such a conventional plate vise device, plate tightening and plate loosening can be done by simply moving the slide forward and backward, making plate conversion easy, but the following problems still remain. In other words, after tightening the plate as described above, if the plate is not tightened properly or if the plate is installed in a distorted manner, tightening the bolts facing the cam individually will prevent it from coming off. However, if you do this, you won't know how much you tightened each individual bolt when replacing the next version, and you won't be able to reproduce the original position as a reference, so you won't be able to make adjustments. In addition to prolonging the plate mounting time, there was also the problem that satisfactory plate mounting accuracy could not always be expected.

[Means for solving problems]

In order to solve this problem, in the present invention, a plurality of cam surfaces are provided on a slide bar which extends freely forward and backward along the side wall surface of the bottom side of the body circumferential notch, and is equipped with a plurality of cam surfaces that are raised and lowered in the forward and backward directions. The cams are fixed in parallel, and the cam surfaces of some of these cams are opposed to the rollers pivoted to the vise side of the butt side, and the remaining rollers that are not in contact with each other are The tips of multiple bolts that were screwed into the vise on the butt side were placed in contact with the cam surface of the cam.

[Effect]

When installing the plate, one end of the plate is held in a side plate vise and wrapped around the body circumference, and the other end of the plate is held in a tail side plate vise. When the slide bar is moved, the contact point of the rollers against the cam moves from the lower part to the higher part, so the bottom side plate vise, to which the rollers are pivoted, moves toward the grip side plate vise, and the plate is tightened so that it fits tightly against the circumference of the torso.

If the plate is not tightened enough after this, or if the plate is installed in a distorted manner and fc-shields, move the bottom plate vise in the plate tightening direction by moving the plate tightening bolt back and forth, or move the rollers by rolling. while moving in the direction of the trunk axis.

To remove the plate from the plate cylinder, if the rollers are floating above the cam surface, loosen the plate tightening bolt and seat the rollers on the cam surface, then move the slide bar in the opposite direction to the plate tightening direction. The plate will loosen, so release the grips of the vise on both plates and remove the plate. When installing the next plate, the rollers remain unchanged and do not move, so there is no need to adjust the zero point and plate tightening can be started immediately.

' [Example] Figures 1 to 5 show examples of the plate vise device according to the present invention, and Figure 1 is a longitudinal section showing the plate vise device broken at the position of the plate tightening roller shaft. 2 is a vertical sectional view of the rear vise cut away at the position of the fine adjustment screw, and Figure 3 is a plan view of the rear vise shown near the cam roller and the fine adjustment screw. , FIG. 4 is a plan view of the entire plate vise device, FIG. 5(a) is a cross-sectional view of the plate tightening bolt and cam, and FIG.
AA sectional view of a), FIG. 5(e) is BB sectional view of FIG. 5(a)
FIG.

In the figure, a notch 2 is provided on the outer periphery of the plate cylinder 1 over the entire length of the plate surface 1 except for the bearers 3 at both ends. A rear vise indicated by reference numeral 5 is provided in parallel. Of these, on the side edge 4 of the gripper, a vise 6 formed with a rectangular cross section and slightly shorter than the entire length of the notch 2 is attached to the side edge 4 of the gripper with a bolt 7 whose head is in contact with the bearer 3. It is positioned and provided in the direction. In addition, a plurality of #I (not shown) are provided on the back side of the vise 6, and a lifting prevention plate (not shown) fixed to the bottom of the notch 2 is engaged with the groove. By doing so, floating of the vise stand 6 is regulated.

Note that the vise stand 6 is movable in the front, rear, left and right directions with respect to the floating prevention plate. Further, bolts 8 for positioning the vise table 6 in the circumferential direction of the plate cylinder 1 are screwed into a plurality of locations in the longitudinal direction of the vise table 6 with their tips abutting against the wall surface of the notch 2.

Reference numeral 9 denotes an auxiliary bolt that assists in fixing after positioning with the bolt 8.

What is indicated by the reference numeral 10 is a holding plate of two types, long and short, which is stacked on three parts of the vise table 6 in the length direction, and two or four pieces are perforated in each holding plate 10. A bolt 12 is inserted into the port hole 11, and its threaded portion is screwed into the threaded hole of the vise stand 6, and its loosening is regulated by a set screw (not shown).

A semicylindrical washer 13 is inserted between the head of the bolt 12 and the holding plate 10, and is in contact with the arcuate concave surface of the holding plate 10. The holding plate 10 uses this arcuate surface as a sliding surface. It is configured to rotate and hold the plate 14 between it and the vice stand 6. Reference numeral 15 denotes a presser plate 10f: a rotating presser shaft, which is rotatably supported by a groove 16 formed over the entire length of the end edge of the vise table 6, and is divided into each presser plate 10. , the outer circumferential surface thereof has a notch 15 & which allows the presser plate 10 to be opened by holding the edge of the presser plate 10.
is provided. The presser plate 10 is biased in the opening direction by a compression coil spring 17 loaded into the spring hole of the vise stand 6 and a pin 18, and a large diameter portion 19 provided at the center of each presser shaft 15 By inserting a handle (not shown) into the handle hole and rotating the presser shaft 15, the edge of the presser plate 10 selectively engages with the circular arc portion of the presser shaft 150 and the notch 15a, and the presser plate 10 is configured to open and close.

The above explanation has been about the grip side blade 4, but the butt side vise 5
Also, the structures of the vice stand 6 and the presser plate 10, as well as the opening/closing mechanism of the presser plate 10, etc., are almost the same as those of the gripper side blade, so the same reference numerals will be given and the explanation thereof will be omitted. However, the butt side vise 5
The vise stand 6 is divided into three long and short pieces corresponding to the presser plate 10, and bolts 20 are provided between the vise stands 6 to restrict their movement. Also, between both vises 4 and 50, there are a plurality of pins 2 that are springed by a compression coil spring 21.
2 is interposed.

Next, the structure of the positioning device for the plate 14 will be explained. The plate 14 has U-shaped reference bottle holes that open toward the edge at three locations, two on the grip side edge and the center of the butt side edge. 4.5 vice stand 6 and notch 2
The pin stand 23 is cut out between the vise stand 6 and the presser plate 10t and positioned on the bottom of the plate cylinder notch 2.
．． 24 is implanted with reference bottles 25 and 26 that fit into the reference bottle holes of the plate 14. Furthermore, in the butt side vise 5, the plate 14 after being held in both vises 4.5 is the plate)
A plate tightening device is provided that pulls and tightens the plate so that it comes into close contact with the JLL. That is, the butt side wall surface 2a of the notch 2
The notch 2 is provided with a groove 27 that spans the entire length of the notch, and within this groove 27 is a slide par 2 of the same length.
8 is supported so as to be able to reciprocate in the longitudinal direction. The slide par 28 has a plurality of cams 29 and 30 (in this embodiment, three cams 29 and a cam 30) each having a cam surface consisting of an inclined surface that rises and falls in the direction of the reciprocating power and a cam surface that is a flat surface that follows the cam surface. (4 cams) are integrally formed, of which 3 cams 2
9 is in contact with a lever 31 for adjusting the zero point of plate tightening. That is, the shaft hole 6a provided in the vice stand 6 has a roller @
32 is fitted in a slidable manner, and the threaded portion 32b of the roller shaft 32 is screwed into the threaded hole 6b of the vise table 6 so as to be able to move forward and backward, and is fixed with a nut 33. , the rollers 31 are pivotally attached to the U-shaped head 32e of the roller shaft 32 with pins 34. Moreover, on the cam surface of each of the four cams 30,
Micro 1 screwed into the screw hole 6d of the vise stand 6 so that it can be adjusted forward and backward.
The tip surfaces of the 4!1 screws 35 are in contact with each other. 36 is very small
This is a stop collar that is screwed into the tip of the 4U screw 35 and restricts the end of its movement.

On the other hand, the reference numeral 37 is a pin for advancing and retracting the slide par 28, and is inserted into the vise table 6 from the side surface in correspondence with the top 38 welded to the slide par 28 so that it can rotate and move back and forth. The head 39 has a handle hole 39a, and is biased toward the top 38 by a compression coil spring 40 interposed in the stepped portion. As shown in FIG. 5(e), the tip of the pin 37 has a flange 37a that is concentric with the pin 37, and an eccentric pin that is eccentric by an amount t in the figure with respect to the axis F of the pin 3T. 37b is integrally formed with υ, eccentric bin ayb box i 3 i
It engages with the U-shaped groove 38a provided in 3. By doing this, the pin 37 can be moved from the position shown in FIG. 5(c).
200° clockwise 8! When rotated, the eccentric bin 3
7b is about 200 degrees clockwise around the axis F of pin 37.
The slider 28, which rotates around and engages with the eccentric pin 37b via the top 38, moves to the left in the figure by 2 times t. Therefore, the roller 31 facing the lower part of the cam 29
The roller 31 moves up the slope of the cam 29 to face the high part, and the entire butt side vise 5 is pushed toward the gripper side by the lift of the cam 23. As is clear from FIG. 5(C), the eccentric bottle 37b is 18
Each relative position is set so that after it rotates a little more than 00 and passes the dead center, it comes into contact with the bottom surface of the U-shaped groove 138 at both ends of the rotation. Furthermore, by rotating the fine adjustment screw 35 from the state shown in FIG. 3, the butt side vise 5 can be further pulled toward the lateral force side. A block gauge 41 is inserted between the vise table 6 and the wall surface of the notch 2 to position the vise table 6 before mounting the plate 14.

The operation of mounting the plate on the nine-print cylinder constructed as described above will be explained. First, before assembling the pin stand 23, 24 with a vice 4.5, accurately position and fix it on the bottom of the notch 2, and then position the reference pin 25, 26 accurately with respect to the axis of the plate cylinder 1. After deciding, support the vices 4 and 5 on the bottom of the notch 2 so that they can be moved forward, backward, left and right, and use the block gauge 41 to tighten the notch 2.
Position the bolts γ, 8, 9 so that they are parallel to the wall of
．． Temporarily fix at 20. After preparing in this way, when the handle is inserted into the large diameter portion 19 of the presser shaft 15 of the side gripper blade 4 and rotated clockwise from the position shown in FIG. corresponds to the notch 15a of the presser shaft 15, so the presser plate 10 is opened by the elastic force of the compression coil spring 17. Then, the plate 14 is inserted between the presser plate 10 and the vice stand 6, and its reference pin hole is fitted into the reference pin 25 on the vice stand 6 side. Then, when the presser shaft 15 is rotated counterclockwise in FIG. The plate 14 is held between the plate 14 and the vise stand 6. In this way, each press shaft 15 is sequentially rotated to clamp the plate 14, and then the plate 14 is wrapped around the circumferential surface of the plate cylinder 1, and the plate 14 is wrapped around the circumferential surface of the plate cylinder 1.
Fit the reference pin hole 4 into the reference pin 26 on the butt side, and move the plate 14 to the presser plate 1o on the butt side and the vise stand 6 using the same procedure as for the gripper side.
Put it in between. In this state, the plate 14 is loose and does not come into close contact with the circumferential surface of the cylinder, so the plate is tightened after the temporary fixation with the bolts 7 is released.

That is, when the plate clamping pin is rotated approximately 200° clockwise in FIG. 5(c) in the state shown in FIG. 5, the eccentric bin 37b
The top 38, which engages with this in the U-shaped groove, is moved to the left in the figure and rotates about 200 degrees around the axis F of the pin 37, reaching the position indicated by the symbol F in the figure. As a result, the slider 28 moves, and the rollers 31 that were in contact with the lower part of the cam 29 go up the slope of the cam 29 and come into contact with the higher part of the cam 29, and all the rollers 31 are moved simultaneously to the gripping side. Move to the 4th direction. This causes the rear vise 5 to be drawn toward the gripper vise, and the plate 14 is pulled and brought into close contact with the surface of the plate cylinder 1. After this, if the plate 14 is installed in a distorted manner, correct it by tightening and loosening the plate 7 and moving the butt vise 5 in the plate width direction.

In this case, since the rollers 31 roll on the cam 29, the rear vise 5 can be smoothly moved. Alternatively, if the plate 14 is distorted or not fully tightened, tighten each fine adjustment screw 35 individually to correct the distortion and further tighten the plate 14. At this time, the rollers 31 are slightly separated from the cam surface of the cam 29.

Since the plate 14 is largely tensioned by the rollers 31, the rotation stroke of the fine adjustment screw 35 may be small.

In addition, when the plate 14 is stretched, the eccentric pin 37b continues beyond the dead center until it comes into contact with the bottom of the U-shaped groove, so that a stable state is maintained.

If the plate 14 is to be replaced again after printing has been carried out with the plate mounted in this manner, and the fine adjustment screw 35 has been tightened, loosen the fine adjustment screw 35 and move the roller 31 to the cam. Place it on the cam surface of 29. As a result, the butt side vise 5 is set to the original position and the zero point is set, so the bottle 37
The slide par 2 is rotated by the action of the eccentric pin 37b.
8 and the cams 29 and 30t integral therewith - when moved to the right in FIG. 3, the butt side vise 5 moves in a direction away from the side blades and the plate 14 is completely loosened. Thereafter, the 9th plate 14 is removed by opening the holding plate 10 of the vise in the order of the tail side and the grip side in the same manner as described above.

When installing a new plate 14, hold both ends of the plate 14 in a vise in the order of the grip side and the butt side in the same way as above.Since the rollers are already set to zero, tighten the plate immediately. be able to.

〔Effect of the invention〕

As is clear from the above invention, according to the present invention, in a plate vise device of a sheet-fed rotary printing press, a slide bar extending freely back and forth along the plate bottom side wall surface of a notch around the cylinder is provided with a plate vise device for a sheet-fed rotary printing press. A plurality of cams each having a cam surface that rises and falls in the direction are fixed in parallel, and rollers pivoted to the butt side vise are respectively mounted on the cam surface of some of these cams. At the same time, the cam surfaces of the remaining cams that are not in contact with the rollers are configured so that the tips of a plurality of bolts, which are screwed into the butt side vise so that they can move forward and backward, are brought into contact with each other. The plate tension roller and fine adjustment screw are separated, and the zero setting of the vise and fine adjustment screw can be performed with one touch, which greatly reduces the time for changing plates, improving productivity, and are attached with high precision, improving the quality of printed matter.

[Brief explanation of the drawing]

1 to 5 show an embodiment of a plate vise device for a sheet-fed rotary printing press according to the present invention, and FIG. 1 shows this plate vise device TIL.
A vertical cross-sectional view showing the broken part at the position of the roller shaft for plate tightening, No. 2
The figure is a longitudinal sectional view of the rear vise broken at the fine adjustment bolt position, Figure 3 is a plan view of the rear vise near the cam roller and fine adjustment bolt, and Figure 4 is a top view of the rear vise shown in the vicinity of the cam roller and fine adjustment bolt. Figure 5(a) is a plan view of the entire plate vise device, Figure 5(a) is a cross-sectional view of the plate tightening bolt and cam, Figure 5(a) is a cross-sectional view taken along line AA in Figure 5(a), and Figure 5(e) is a cross-sectional view of the plate clamping bolt and cam.
) is a BB sectional view of FIG. 5(a). 1... Plate cylinder, 2... Notch, 2a... Bottom side wall surface, 4... Gripping side blade, 5... Bottom side vise,
14...version, 28...sly)' bar, 29
* 30...life/cam, 31...koro, 35...
Φ habituation adjustment screw.

Claims (1)

[Claims] A side plate vise grips one end of the printing plate attached to the plate cylinder, and the other end of the printing plate is held in its mouth and pulled in the direction of the grip side vise, thereby bringing the printing plate into close contact with the circumferential surface of the cylinder. In a plate vise device for a sheet-fed rotary printing press, which is equipped with a plate vise at the bottom side of the plate cylinder in a notch on the outer periphery of the plate cylinder, the plate vise is capable of moving back and forth along the side wall surface of the plate bottom side of the cylinder circumferential notch. A plurality of cams each having a cam surface that is fixed to a slide bar extending in the forward and backward directions and whose cam surfaces are raised and lowered in the forward and backward directions, and the peripheral surfaces of some of these cams are brought into contact with the cam surfaces of each cam. A plurality of plate tightening reference position setting rollers are pivotally mounted on the butt side plate vise side, and the tips of the rollers are brought into contact with the cam surfaces of the remaining cams from a right angle direction, respectively. A plate vise device for a sheet-fed rotary printing press, characterized in that a plurality of fine adjustment screw members are screwed into the rear plate vise so as to be movable forward and backward.