JPH02263Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a plate vise device that grips and holds both ends of a printing plate mounted on a plate cylinder in a sheet-fed rotary printing press.

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

FIG. 1 is a sectional view of a conventional grip-side plate vise, and this will be explained based on the figure.A notch 2 is provided on the outer circumference of the plate cylinder 1 along its entire length.
Inside, a vice stand 3, which is slightly shorter than the total length of the plate cylinder 1, is prevented from floating from the bottom surface of the notch 2 by a lifting prevention holding plate (not shown), and is placed in each direction parallel to the bottom surface. It is formed and provided so that it can be moved freely. This vise table 3 has a presser plate 4 divided into a plurality of pieces in the longitudinal direction, which is attached to the head of a bolt 6 that is screwed into the vise table 3 and secured with a set screw 5. It is attached by being held in two places in the longitudinal direction. In addition, a notch 7 is provided at the edge of the vice stand 3.
A presser shaft 7 having a diameter a is provided over the entire length of each presser plate, and one end of the presser plate 4 is biased and engaged with the notch 7a by a spring member (not shown).

In order to hold the plate 8 with the plate vise configured in this way, one end of the plate 8 is inserted between the holding plate 4 and the vise stand 3, and a pin for a jig prepared separately is inserted between the plate 8 and the plate 8. After temporarily holding the plate 8 by inserting it into the reference pin hole (not shown) with the vice stand 3, insert the handle 9 into the handle hole provided in the large diameter part of the presser shaft 7, and then insert the handle 9 in the counterclockwise direction as shown in the figure. When the presser plate 4 is rotated to , one end of the presser plate 4 that had been engaged with the notch 7 a comes to engage with the arcuate surface of the presser shaft 7 . Therefore, the presser plate 4 is pushed up by the presser shaft 7 and rotated clockwise in the figure around the head of the bolt 6, so that the plate 8 is held between the other end of the presser plate 4 and the vice stand 3. be held tightly. After removing the temporary holding pin, the plate 8 is wrapped around the circumference of the plate cylinder.
Mounting of the plate 8 is completed by holding the other end of the plate 8 in the plate vise on the rear side in the same manner as above.

However, in such a conventional plate vise device, a semicylindrical washer 10 is inserted into the head of the bolt 6, and the fitting between the arcuate surface of the washer 10 and the arcuate surface provided on the presser plate 4 is difficult. A sliding surface of the holding plate 4 relative to the bolt 6 is formed by this combination, and the center of this sliding arcuate surface is located considerably above the holding surface of the plate 8, as indicated by the symbol P in the figure. Therefore, from the position shown in the figure, presser plate 4 is moved as described above.
When the plate 8 is rotated to clamp the plate 8, the holding surface 4a of the holding plate 4 makes a slight movement in the direction of drawing the plate 8 in addition to the direction of pressing the plate 8. Even if this amount is small, it is a large amount when viewed from the mounting accuracy of the plate 8. This reduces the registration accuracy of the plate 8, and it takes a long time to register the plate 8 after this, reducing work efficiency. was significantly reduced.

The present invention was developed in view of the above points, and involves inserting a pair of washers between the head of the bolt that supports the presser plate in a vise stand and the presser plate, and By using this as the sliding surface for rotating the presser plate, and setting the center of this arc on the same plane as the plate gripping surface formed by the presser plate and vise table, the plate can be held in place when the plate is gripped. The present invention provides a plate vise device for a sheet-fed rotary printing press that prevents misalignment, reduces registration time, improves work efficiency, reduces the amount of paper waste, and improves the quality of printed matter. Embodiments of the present invention will be described in detail below with reference to the drawings.

Figures 2 to 5 show an embodiment of the plate vise device according to the present invention, Figure 2 is a plan view of a plate cylinder in which this is implemented, and Figure 3 is an enlarged view of the main part of the notch in Figure 2. A plan view, FIG. 4 is a sectional view taken along line AA in FIG. 3, and FIG. 5 is a sectional view taken along line BB in FIG. 3. In the figure, a notch 12 is provided on the outer periphery of the plate cylinder 11 for bearers 1 at both ends.
It is provided over the entire length of the plate cylinder 1 except for the part 3, and in this notch 12, a gripping side vise, generally indicated by the numeral 14, and a bottom side vise, indicated by the numeral 15, are provided in parallel. It is being Of these, the grip side vise 14
A vise 16, which is slightly shorter than the entire length of the notch 12 and has a rectangular cross section, is used to hold the bearer 13.
The bolt 17 is positioned in the length direction by a bolt 17 whose head is in contact with the bolt 17. Further, a plurality of grooves (not shown) are provided on the back surface of the vise table 16, and a lifting prevention plate (not shown) fixed to the bottom surface of the notch 12 can be engaged with the grooves. This restricts the floating of the vice stand 16. Note that the vise stand 16 is movable in the front, back, left and right directions with respect to the floating prevention plate. Further, bolts 18 for positioning the vise table 16 in the circumferential direction of the plate cylinder 11 are screwed into a plurality of locations in the longitudinal direction of the vise table 16 with their tips abutting against the wall surface of the notch 12. 19 is bolt 18
This is an auxiliary bolt that assists in fixing after positioning.

Reference numerals 20 and 21 refer to holding plates of two types, long and short, which divide the vise table 16 into three in the length direction and stack them on top of each other. Two or four bolt holes 22 with a step-like shape and side view are drilled, and a bolt 23 is inserted into each bolt hole 22, and the threaded portion of the bolt 23 is inserted into the screw of the vice stand 16. It is screwed into the hole. 24
is a set screw for stopping loosening of the bolt 23, and is screwed into the side surface of the vice stand 16 with a synthetic resin tip 25 interposed on the surface that contacts the bolt 23.
A pair of washers 26 and 27 are inserted between the head of the bolt 23 and the holding plates 20, 21 so that they can slide relative to each other depending on how tightly the bolt 23 is tightened. Since the washer 27 is formed into a semicylindrical shape, the sliding surfaces between the washer 26 and the washer 27 are arcuate in the cross section of FIG. 4 and linear in the cross section of FIG. Of the pair of washers, the washer 26 on the bolt head side has an arcuate sliding surface formed by a concave surface, and the washer 27 on the holding plate side has an arcuate sliding surface formed by a convex surface. The holding plates 20 and 21 are configured to rotate around the arcuate center of the sliding surface indicated by the symbol P in FIG. 4. Due to this rotation, the holding plates 20 and 21 open and close relative to the vise table 16 to grip and release the plate 28, and the arcuate core P of the sliding surface is approximately parallel to this plate holding surface. They are set to be on the same plane. Reference numeral 29 denotes a presser shaft for rotating the presser plates 20 and 21, which is pivotally supported in a groove 30 formed over the entire length of the end edge of the vice stand 16. A notch 29a is provided on the outer peripheral surface of the holding plate 20, 21 to open the holding plate 20, 21 by engaging the edge portions of the holding plate 20, 21. And the presser plate 20,
21 is biased in the opening direction by a compression coil spring 31 and pin 32 loaded into the spring hole of the vice stand 16, and a large diameter portion 33 provided at the center of each presser shaft 29.
By inserting a handle (not shown) into the handle hole of and rotating the presser shaft 29, the presser plate 20,
The end edge of 21 is the circular arc part of the presser shaft 29 and the notch 29a
The holding plates 20 and 21 are configured to open and close by selectively engaging with the holding plates 20 and 21.

The above description has been about the mouth-side vise 14, but the butt-side vise 15 is similar to the mouth-side vise 14 in terms of the structure of the vise base 16 and the holding plates 20, 21, as well as the opening/closing mechanism of the holding plates 20, 21. Since they have the same configuration, the same reference numerals are given and the explanation thereof will be omitted. However, the vise stand 16 of the butt side vise 15 is divided into three long and short parts corresponding to the presser plates 20 and 21, and between the vise stands 16,
A bolt 34 is provided to restrict its movement. Further, a plurality of pins 36 are interposed between both vices 14 and 15, and are urged by a compression coil spring 35.

Next, the structure of the positioning device for the plate 28 will be explained. The plate 28 is provided with U-shaped reference pin holes that open toward the edge at three locations: two on the mouth edge and the center of the butt edge. On the other hand, in the space formed between the vise base 16 and the wall surface of the notch 12 of both vises 14 and 15 by cutting out the vise base 16 and the holding plates 20 and 21, there are pins. pedestal 37,
38 is positioned and fixed on the bottom surface of the plate cylinder notch 12, and the plate 2
Reference pins 39 and 40 that fit into the reference pin holes of No. 8
are planted in each. Furthermore, in order to pull the butt-side vise 15 toward the grip-side vise 14 side so that the plate 28 is attached to the torso circumferential surface, the vise stand 16 of the butt-side vise 15 is equipped with: A plurality of plate clamping bolts 41 are screwed into the notch 12 with their tips in contact with the wall surface of the notch 12. 42 is the vise stand 16 and the notch 12
This is a block gauge that is inserted between the plate 28 and the wall surface to position the vise stand 16 before mounting the plate 28.

The operation of mounting a plate on the plate cylinder configured as described above will be explained. First, place the pin stands 37 and 38 in a vise 1.
4 and 15, accurately position and fix them on the bottom of the notch 12, and after accurately positioning the reference pins 39 and 40 with respect to the axis of the plate cylinder 11, move the vises 14 and 15 back and forth. It is supported on the bottom surface of the notch 12 so as to be able to move from side to side, positioned parallel to the wall surface of the notch 12 using a block gauge 4, and temporarily fixed with bolts 17, 18, 19, and 41. After preparing in this way, presser shaft 2 of grip side vise 14
When the handle is inserted into the large diameter portion 33 of 9 and rotated clockwise from the position shown in FIG.
Since the end edges of 0 and 21 correspond to the notches 29a of the presser shaft 29, the presser plates 20 and 21 are opened by the elastic force of the compression coil spring 31. Then, the plate 28 is inserted between the holding plates 20, 21 and the vice stand 16, and its reference pin hole is fitted into the reference pin 33 on the vice stand 16 side. When the presser shaft 29 is rotated counterclockwise in FIG. 4, the edges of the presser plates 20 and 21 correspond to the arcuate portions of the presser shaft 29,
21 rotates against the elastic force of the compression coil spring 31 and grips the plate 2 between it and the vice stand 16. In this case, since the center of the arcuate surface that becomes the sliding surface when the presser plates 20 and 21 rotate is set to be on the same plane as the plate holding surface, the presser plates 20 and 21
The component force in the direction of pulling the plate 28 from the time the plate 21 comes into contact with the plate 28 until it finishes gripping the plate 28 is applied to the presser plates 20, 21.
The reference pin 39 does not act on the plate 28 and does not shift.
It is held in the mouth as it is positioned. In this way, each presser shaft 29 is sequentially rotated to clamp the plate 28, and then the plate 28 is wrapped around the circumferential surface of the plate cylinder 11, and the plate 28 is
Fit the reference pin holes on the reference pins 40 on the butt side, and move the plate 28 to the holding plate 20 on the butt side using the same procedure as for the gripping side.
21 and the vise stand 16. and,
After releasing the temporary fixation with the bolts 17, the plurality of plate tightening bolts 41 are sequentially tightened, and the butt-side vise 15 is moved against the elastic force of the compression coil spring 35, and the grip-side vise 1 is tightened.
4 side to tighten the plate 28 so as to bring it into close contact with the circumferential surface of the trunk, and by tightening the bolts 17 and fixing the vice stand 16, the mounting of the plate 28 is completed.

FIG. 6 shows another embodiment of the present invention, in which FIG. a is a sectional view corresponding to FIG. 5, and FIG. b is a plan view. In this embodiment, the contact surfaces of the washers 26A and 27A, which are the rotating and sliding surfaces of the presser plates 20 and 21, are formed in a spherical shape, and therefore break at the position shown in FIG. 6a. Both washers 26A, 27A
The opposing surfaces are arcuate. The other configurations and operations are the same as in the previous embodiment. By doing so, the presser plates 20 and 21 can be rotated smoothly.

As is clear from the above explanation, according to the present invention, in the plate vise device of a sheet-fed rotary printing press, a pair of washers are interposed between the head of the bolt that supports the presser plate on the vise stand and the presser plate. The opposing circular arc surfaces of these washers are used as sliding surfaces for rotating the presser plate, and the center of this circular arc surface is set on the same plane as the plate gripping surface formed by the presser plate and vise table. By doing so, when the presser plate is rotated to grip the plate, the plate does not move from the time the presser plate touches the plate from the right angle until it finishes gripping the plate, so the plate can be held accurately. The ability to hold the plate in your mouth ensures the registration accuracy of the plate and improves the quality of printed matter.It also reduces the time required for registering the plate, reducing preparation time and improving the operating rate of the printing press. The amount of waste paper generated can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional plate vise device for a sheet-fed rotary printing press, and FIGS. 2 to 6 show embodiments of the plate vise device for a sheet-fed rotary printing press according to the present invention.
Fig. 2 is a plan view of the plate cylinder in which this has been implemented, Fig. 3 is an enlarged plan view of the main part of the notch in Fig. 2, Fig. 4 is a cross-sectional view along AA of Fig. 3, and Fig. 5 is a plan view of the main part of the notch in Fig. 3. FIG. 6a is a sectional view showing another embodiment of the present invention corresponding to FIG. 5, and FIG. 6b is a plan view. 11... Plate cylinder, 12... Notch, 14... Mouth side vise, 15... Butt side vise, 16... Vise stand, 2
0, 21... Holding plate, 22... Bolt hole, 23...
...Bolt, 26, 26A, 27, 27A...Washer, 28...Version.

Claims (1)

[Scope of utility model registration request] A presser plate is stacked on a vise table extending into the notch in the outer periphery of the plate cylinder, and bolts are inserted through each of the plurality of holes provided in the presser plate and screwed into the vise table. In addition to supporting the plate, the press plate is rotated in contact with the sliding arc surface provided between the press plate and the head of the bolt, so that the printing plate can be held between the plate and the vise table. In the plate vise device of a sheet-fed rotary printing press, the washer forming the sliding arc surface is composed of a washer on the bolt head side with the arc surface as a concave surface and a washer on the presser plate side with the arc surface as a convex surface. and a plate vise device for a sheet-fed rotary printing press, characterized in that the arc center of the sliding arc surface is set on substantially the same plane as the printing plate gripping surface by the presser plate and vise table. .