JPH02208045A - Plate vise device for sheet-fed rotary printing presses - Google Patents

Abstract

PURPOSE:To uniformly apply a plate under tension by a method wherein a plurality of roll shafts are inserted in the pinholes of a plate lock up device on a tail side to respectively oppose the rolls pivotally mounted to the leading end parts thereof to a cam surface and a spring member energizing the plate lock up device on the tail side in a plate tensioning direction is interposed between the leading end heads of the roll shafts and a plate lock up stand. CONSTITUTION:When a handle is inserted in the large diameter part 19 of the press shaft 15 of a plate lock up device 4 on a gripping side to be revolved in a clockwise direction, a press plate 10 is opened by the elastic force of a compression coil spring. Then, a plate 14 is inserted between the press plate 10 and a plate lock up stand 6 and a reference pin 25 on the side of the plate lock up stand 6 is fitted in the reference pin hole of the plate 14. When the press shaft 15 is revolved in the counterclockwise direction of Fig 1, the press plate 10 is revolved against the elastic force of the compression coil spring and the plate 4 is gripped between the press plate 10 and the plate lock up stand 6. Next, the reference pin 26 on a tail side is fitted in the reference pinhole of the plate 14 and the plate 14 is gripped between the press plate 10 on the tail side and the plate lock up stand 6 in the same procedure as that on the gripping side to release temporary fixing due to a bolt and, thereafter, the plate is applied under tension.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a plate vise device for holding both ends of a printing plate attached to the peripheral surface of 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 the grip side plate vise 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 the plate vise on the rear side that lags in the rotation direction of the cylinder. This is done by holding the plate in your mouth. After holding the plate in the vise on the butt side, you must move the vise on the butt side towards the vise on the grip side to tighten the plate so that it is in close contact with the circumference of the body. Of course, as this stenciling structure, for example, those proposed by the present applicant and disclosed in Japanese Patent Application Laid-Open No. 59-67055 and Japanese Patent Application Laid-Open No. 63-118255 are known. The plate vise device includes a slide bar that extends along the side wall surface of the plate bottom of the notch around the body, and a plurality of cams that are fixed in parallel to the slide bar and have cam surfaces that are high and low with respect to the extending direction of the slide bar. The rear vise has a plurality of pins that are pivotally attached to the tip of the cam or have their tips facing the cam surface of the cam, and can freely move back and forth in a direction perpendicular to the cam surface. When installing the plate, hold one end of the plate in the side plate vise and wrap it around the trunk, hold the other end in the butt side plate vise, and then attach the slide bar. When the cam is moved forward and backward from the body end, all the contact points on the pin side move from the lower position to the higher position on the cam surface, and the butt side vise moves towards the grip side vise. The plate tension is adjusted by moving the threaded portion of the pin or the bolt pushing it forward and backward within the screw hole.

[Problem to be solved by the invention]

However, in such a conventional plate vise device, it is necessary to move a plurality of screw members back and forth in order to adjust the plate tension force as described above, so it is difficult to make the plate tension force uniform over the entire length of the plate. There was a problem in that it was difficult to achieve uniformity, and it took a long time to achieve uniformity, prolonging the preparation time.

[Means to solve the problem]

In order to solve these problems, the present invention provides a slide bar that extends freely forward and backward along the bottom side wall surface of the trunk notch, and this slide bar has a cam surface that rises and falls in the forward and backward directions. A plurality of roller shafts are inserted into the pin holes of the butt side plate vise and pivoted to the tips of the roller shafts, which fix the multiple cams provided and support the butt side plate vise so that it can move forward and backward in the printing direction. rollers are brought into contact with the cam surfaces of each of the cams, and a spring member is interposed between the tip head of the roller shaft and the vise table to bias the butt-side plate vise in the plate tensioning direction. did.

[For production]

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, and the roller shaft to which the rollers are pivoted is pushed, so all the spring members are compressed at the same time. The elastic force causes the bottom plate vise to move toward the grip side plate vise, thereby tensioning the plate uniformly.

〔Example〕

1 to 5 show an embodiment of the plate vise device according to the present invention, and FIG. 1 is a longitudinal cross-sectional view showing the plate vise device broken at the position of the roller shaft for plate tensioning, and FIG. The figure is a longitudinal cross-sectional view of the rear vise shown broken at the fine adjustment screw position, Figure 3 is a plan view of the rear vise shown in the vicinity of the cam roller and fine adjustment screw, and Figure 4 5(a) is a cross-sectional view of the plate tensioning pin and slide bar, FIG. 5(b) is a sectional view taken along line AA of FIG. 5(a), FIG. (C) is Figure 5(a)
In Figure 0, which is a BB sectional view of A grip side plate vise indicated by 4 and a rear side plate vise indicated by 5 are provided in parallel. Of these, the grip side vise 4 has a vise stand 6 that is slightly shorter than the entire length of the notch 2 and has a rectangular cross section, and is extended by a bolt 7 whose head is in contact with the bearer 3. It is positioned in the horizontal direction. In addition, a plurality of grooves (not shown) are provided on the back surface of the vise table 6, and a lifting prevention plate (not shown) fixed to the bottom surface of the notch 2 is engaged with the grooves. This restricts the lifting of the vise stand 6. The vise stand 6 is movable in front, rear, right and left 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.

The reference numeral 10 denotes holding plates of two types, long and short, which are stacked on top of the vice table 6 divided into three parts in the length direction, and each holding plate 10 is provided with two or four holes. A bolt 12 is inserted into the bolt hole 11, and its threaded portion is screwed into a threaded hole in the vice stand 6, and 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 IO, and the holding plate IO rotates using this arcuate surface as a sliding surface. It is configured to move and hold the plate 14 between it and the vise stand 6. Reference numeral 15 denotes a presser shaft for rotating the presser plate IO, 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 for each presser plate IO. , on its outer circumferential surface, a presser plate 1 is attached.
A notch 15a is provided that allows the holding plate 10 to be opened by engaging the edge portion of the notch 15a. And presser plate 10
is biased in the opening direction by a compression coil spring (not shown) and a pin loaded into the spring hole of the vice stand 6, and each presser shaft 1
By inserting a handle (not shown) into the handle hole of the large-diameter portion 19 provided in the center of the presser shaft 15 and rotating the presser shaft 15, the edge of the presser plate lO is aligned with the circular arc portion of the presser shaft 15 and the notch 1.
5a so that the presser plate 10 opens and closes.

The above has explained the grip side vise 4, but the butt side vise 5 also includes the structure of the vise base 6 and the presser plate lO, and the presser plate 1.
Since the opening/closing mechanism of 0 has the same structure as the gripper side plate vise, the same reference numerals will be given to it and the explanation thereof will be omitted. However, the vise base 6 of the butt side vise 5 is divided into three long and short parts corresponding to the presser plate 10, and bolts 20 are provided between the vise bases 6 to restrict their movement. There is. Further, a plurality of pins 22, which are resiliently urged by compression coil springs 21, are interposed between both plate vises 4 and 5.

Next, the structure of the positioning device for the plate 14 will be explained.The zero plate 14 has U-shaped reference pin holes that open at three places in total, two on the gripper side edge and the center part of the butt side edge. -ζ is bored, and on the other hand, the vise stand 6 and the holding plate lO are notched between the vise stand 6 of both plate vises 4 and 5 and the wall of the notch 2, and the plate cylinder notch 2 is cut out. Reference pins 25 and 26, which are fitted into the reference pin holes of the plate 14, are implanted in pin stands 23 and 24 that are positioned and fixed on the bottom surface.

Further, the rear plate vise 5 is provided with a plate tensioning device that pulls and tensions the plate 14 held in both plate vises 4° 5 so as to bring it into close contact with the plate cylinder 1. That is, a groove 27 extending over the entire length of the beam of the notch 2 is provided on the butt side wall surface 2a of the notch 2, and within this groove 27, a slide par 28 having the same length as this beam can move forward and backward in the longitudinal direction. is supported by The slide par 28 has a plurality of cams 29 and 30 (in this embodiment, there are three cams 29 and a cam 30) each having a cam surface consisting of an inclined surface that rises and falls in the forward and backward directions and a flat surface that follows the cam surface. 4 pieces) are integrally formed,
Each of the three cams 29 is contacted with a roller 31 for printing. That is, a roller shaft 32 consisting of a shaft portion 32a and a threaded portion 32b is fitted into the small diameter portion 6a of the shaft hole provided in the vice stand 6 with the large diameter portion 6b of the shaft hole and a portion of the shaft 32 in an oval shape. By fitting them together, rotation is restricted and the threaded portion is inserted so as to move forward and backward in the printing direction, and the roller 31 is pivotally attached to a U-shaped head 32c at the tip of the roller shaft with a pin 34. In the shaft hole large-diameter portion 6b into which the shaft portion 32a of the roller shaft 32 is engaged, there is a plate tensioning spring 6c as a spring member that biases the entire bottom plate vise 5 in the plate tension direction. It is interposed between the character-shaped head 32c and the stepped portion of the large diameter portion 6b of the shaft hole. A double nut 33 is screwed onto the threaded portion 32b of the roller shaft 32, and a gap is formed between the double nut 33 and the vise stand 6. 14 is set so that it remains even when it is fully stretched. Moreover, on the cam surface of each of the four cams 30,
The tip surfaces of the fine adjustment screws 35 screwed into the screw holes 6d of the vise table 6 so as to be adjustable forward and backward are in contact with each other, and each of the fine adjustment screws 3
A stop collar 36 that restricts the end of the movement is fitted onto the tip of 5 and fixed thereto. On the other hand, the reference numeral 37 is a pin for advancing and retracting the slide par 28, and is inserted into the vice stand 6 from the side surface in a manner that corresponds to the top 38 welded to the slide par 28 so that it can be rotated and moved back and forth. The pin 37 has a head 39 having a handle hole 39a, and is biased toward the top 38 by a compression coil spring 40 interposed in the step. At the tip of the pin 37, as shown in FIG.
The same crocodile 37a is integrally formed with an eccentric pin 37b which is eccentric to the axis F of the pin 37 by an amount indicated by the symbol t in the figure. 38a. By doing this, the pin 37 is moved 20 degrees clockwise in FIG. 5(C) from the position shown in FIG.
When rotated by approximately 0°, the eccentric pin 37b rotates approximately 200° clockwise around the axis of the pin 37, and the slider 28, which is engaged with the eccentric pin 37b via the stopper 38, moves to the left in the figure. Move the beam twice as far. Therefore, the roller 31 that was opposed to the lower part of the cam 29 is moved, and the entire rear vise 5 is pushed toward the gripper side by the lift of the cam 29. In addition, Fig. 5 (C)
As is clear from the above, each relative position is set so that the eccentric pin 37b rotates slightly more than 180°, passes the dead center, and then comes into contact with the bottom surface of the U-shaped groove 38a of the top 38 at both ends of rotation. ing.

Further, by rotating the fine adjustment screw 35 from the state shown in FIG. 3, the butt side plate vise 5 can be further drawn toward the grip side plate vise 4 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 a plate on the plate cylinder configured as described above will be explained. First, before assembling the plate vise 4.5, accurately position and fix the pin stand 23, 24 to the bottom of the notch 2, and place the reference pin 25, 26 accurately relative to the axis of the plate cylinder l. After positioning, support the plate vise 4°5 on the bottom of the notch 2 so that it can move back and forth and left and right, and position it parallel to the wall of the notch 2 using the block gauge 41. , 8
Temporarily fix at 9.20°.

After preparing in this way, presser shaft 1 of gripper side vise 4
When the handle is inserted into the large diameter portion 19 of the presser plate 10 and rotated clockwise from the position shown in FIG. is opened by the elastic force of a compression coil spring (not shown), then the plate 14 is inserted between the holding 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. 1, the edge of the presser plate IO corresponds to the circular arc portion of the presser shaft 15, so that the presser plate IO resists the elastic force of the compression coil spring. The plate 14 is held between the plate 14 and the vise stand 6. After rotating each presser shaft 15 sequentially in this manner to clamp the plate 14, the reference pin hole of the plate 14 is fitted to the reference pin 26 on the rear side, and the plate 14 is held on the rear side in the same manner as on the gripper side. It is held between the plate 10 and the vice stand 6. In this state, the plate 14 is loose and does not fit tightly around the trunk, so the temporary fixation with the bolts 7 is released, and then the plate is stretched.

That is, when the pin 37 is rotated approximately 200'' clockwise in FIG. 5(C) in the state shown in FIG. The pin 370 rotates about 200 degrees around the axis F while moving to the position F+ in the figure.As a result, the slider 28 moves, and the roller 31 that was in contact with the lower part of the cam 29 moves. moves up the inclined surface of the cam 29 and comes into contact with the upper plane of the cam 29, and all the rollers 31 move at the same time toward the side plate vise 4. As a result, all the plate tension springs 6C are compressed at the same time. Due to the elastic force, the tail side plate vise 5 moves in the direction of the grip side plate vise 4, so that the plate 14 is uniformly stretched and tightly adheres to the circumferential surface of the plate cylinder 1.

After this, if plate 14 is installed in a distorted manner, bolt 7
Adjust by tightening or loosening and moving the butt side vise 5 in the width direction of the blade. In this case, since the rollers 31 are transferred on the cam 29, the movement of the butt side vise 5 is performed smoothly. Furthermore, if the plate 14 is distorted or not fully tensioned, tighten each V&adjustment screw 35 individually to correct the distortion and further tension the plate 14. At this time, roller 31
is 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 is only required to be small.
4, the eccentric pin 37b has passed the dead center until it comes into contact with the bottom of the U-shaped groove 38a, so a stable state is maintained.

When replacing the plate 14 after performing printing work with the plate 14 attached in this manner, if additional tightening is being performed using the fine adjustment screw 35, 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 zero point of the C butt side vise 5 is set to the original position ff, so
When the pin 37 is rotated and the eccentric pin 37b moves the slide bar 28 and the cams 29 and 30 integrated therewith to the right in FIG. 4, and the plate 14 is completely loosened. After that, the plate 14 is removed by opening the holding plate 10 of the plate 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 the plate vise in the same manner as above, in the order of the grip side and the bottom side.Since the rollers 31 have already been set to zero, the plate tension can be started immediately. It can be performed.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in a plate vise device for a sheet-fed rotary printing press, a slide bar is provided that extends freely forward and backward along the plate end side wall surface of the cylinder circumferential notch,
A plurality of cams each having a cam surface that moves up and down in the forward/backward direction are fixed to this slide bar, and a plurality of roller shafts supporting the bottom side plate vise so as to move back and forth in the printing direction are fixed to the bottom side plate vise. The rollers inserted into the pin holes and pivoted at the tips of the rollers are brought into contact with the cam surfaces of the respective cams, and between the tip head of the roller shaft and the vise stand, a vise on the butt side is placed. By inserting a spring member that biases the cam in the printing direction, when the slide bar is moved at the end of the body during printing, the contact point of the roller against the cam moves from the lower part to the higher part. The roller shaft to which the lever is pivoted is pushed, and all the spring members are compressed at the same time, and the elastic force moves the butt-side plate vise toward the grip-side vise, so that the plate is tensioned uniformly. , the plate is mounted with high precision, improving the quality of printed matter, and
The time required to change plates can be significantly reduced, improving productivity and reducing labor.

[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 the plate vise device broken at the position of the roller shaft for plate tensioning. A vertical sectional view of the butt side vise shown broken at the fine adjustment position;
Figure 3 is a plan view of the butt plate vise showing the vicinity of the cam roller and fine adjustment screw, Figure 4 is a plan view of the entire plate vise device, and Figure 5 is a plan view of the entire plate vise device.
Figure (a) is a cross-sectional view of the plate tension pin and slide bar;
Figure 5 (b) is a sectional view taken along line AA in Figure 5 (a), and Figure 5 (C
) is a BB sectional view of FIG. 5(a). 1... Plate cylinder, 2... Notch, 2a... Butt side wall surface, 4... Grip side plate vise, 5... Bottom side plate vise, 6... ... Vise stand, 6a ... Shaft hole small diameter part, 6b
...Shaft hole large diameter part, 6c...Print tension spring, 14.
...plate, 28...slide bar, 29...cam, 31...roller, 32...roller shaft, 32a...
...Shaft part, 32b...Thread part, 32c...U
Shaped head. Figure 1 Figure 2

Claims (1)

[Claims] A printing plate is created by holding a grip side plate vise and the other end of the printing plate, which is wrapped around the plate cylinder circumferential surface with one end held in the grip side plate vise, and pulling it in the direction of the grip side plate vise. In a plate vise device for a sheet-fed rotary printing press, which is provided with a plate vise on the plate bottom side of the plate cylinder in an outer circumferential notch of the plate cylinder, the plate vise is provided with a plate vise on the plate bottom side wall surface of the cylinder circumferential notch. A slide bar extends along the axis so that it can move forward and backward, a plurality of cams are fixed to the slide bar and have cam surfaces that move up and down in the forward and backward directions, and a plurality of cams that are inserted into the pin holes of the butt side vise are inserted into the butt side vise. A plurality of roller shafts that support the side plate vise so as to be able to move forward and backward in the printing direction, and have rollers pivotally mounted at their tips facing the cam surfaces of the respective cams, and a tip head of the roller shafts. A plate vise device for a sheet-fed rotary printing press, characterized in that a spring member is provided between the vise stand and a spring member for biasing the bottom side plate vise in the printing direction.