JPH061411Y2 - Sheet vise for sheet-fed offset printing press - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] Regarding a plate vise for mounting, tensioning, and holding a printing plate on a plate cylinder of a sheet-fed offset printing machine, particularly positioning of the plate vise on the plate cylinder is easy. The bite-side plate vise provided with a member for

[Prior art]

The plate vise forms a pair on the bite side (printing start side) and the bite tail side (printing end side), and a pair is provided for each plate cylinder. The pair of plate vise is a predetermined position on the plate cylinder. Each of them is separately mounted along a slide guide attached to the top and bottom so that the top and bottom can be moved, and the position of the plate vise is adjusted each time it is necessary to align the printing register. The prior art of the bite-side plate vise will be described below.

The printing plate is accurately manufactured for each color plate, and punch holes are provided for alignment in order to accurately mount it on the plate vise. On the other hand, in the plate vise, pins are planted in accordance with the punch holes of the printing plate, or pin holes are provided and the center of both pin holes is adjusted by a separate tool. A positioning member is provided so that the plate vise is set at a predetermined position only in the vertical direction (circumferential direction of the plate cylinder) with respect to the plate cylinder. For positioning, a scale plate was attached to the plate vise and a matching mark matching the scale plate was mounted on another fixing portion as a reference, and a bolt was rotated to adjust the matching mark.

[Problems to be solved by the invention]

Printed materials that use sheet-fed printing presses are becoming smaller and smaller each year, and therefore the frequency of plate change work that is required each time the printed matter changes is high, and the ratio of print preparation time including plate change to actual printing time is high. The operating rate of the printing press is decreasing due to the increase in

In particular, the time for registering in the operating time of the multi-color printing machine is increasing, and it is required to shorten the registering time. The present invention is extremely effective in shortening the registering time. An object of the present invention is to provide a plate vise with high accuracy and high repeatability by a simple work that does not depend on the scale or the feeling of the operator.

[Means for solving problems]

In order to achieve the above-mentioned object, the plate vise according to the present invention is rotatably axially attached to the center of a bite-side plate vise that is vertically and laterally adjustable, and its axial fitting portion. Is provided with a rotating member whose lower portion is formed in a long diameter portion and a short diameter portion, and the lower portion of the long diameter portion of the lower portion of the rotating member is arranged in the axial direction of the plate cylinder in the bottom wall of the plate cylinder cutout recess facing the rotating member. It is provided with a fixture for fixing the bite-side plate vise, which is provided with a rotating member regulating body that forms a wall surface at intervals equal to the length, in the axial direction of the plate cylinder.

In the present invention, the plate vise is movable in the left-right direction at the rotational position where the rotating member is present, and by rotating the rotating member by 90 °, the major axis portion of the elliptical cross-section is restricted by the restrictor. The plate vise is firmly fixed in the lateral direction by closely contacting the wall surface of the plate. In order to rotate the rotating member, the head of the rotating member is shaped to fit a spanner, or a hole into which a rotating rod is inserted is provided.

〔Example〕

Detailed description will be given with reference to the embodiment shown in FIGS. 1 to 4.

FIG. 1 is a plan view of a plate vise of the present invention with a part thereof omitted, and FIG. 2 is an elevation view of the plate vise in the same manner. A plate vise 3 is provided in a cutout recess 2 of a plate cylinder 1 and a floating prevention plate (not shown). A vise table 4 that is locked to the top and bottom and is movable in the left-right direction, and a press plate 5 that is attached to the vise table 4 with a cap bolt 6 to press and fix the end of the printing plate and to open and close the press plate. Clamp shaft 7, plate vise vertical reference positioning stopper 8, printing plate tension jack bolt 9, plate vise approximately central vise base 4, hexagonal nut-shaped head 10 and constricted neck below the vise. 11, a fitting portion 12 that fits into a hole formed in the vise table, a rotating member 14 protruding downward from the lower surface of the vise table 4 and having an oval or elliptical cross section, and a plate cylinder It is fixed to the bottom wall 2 of the recessed portion and sandwiches the oval portion 13 of the rotating member 14 in the axial direction of the plate cylinder. It consists rotating member regulating body 16 and the like for regulating the lateral movement of the pivot member 14 having a wall 15 at the intervals equal to the major axis L of the oval portion 13 Te.

In the bite-side plate vise of the present invention having the above structure, the bite-side end of the printing plate is fixed to the plate vise 3 by the holding plate 5 shown in FIG. Rotating member 1
Rotate 4 to 90 ° to the position shown in Fig. 6 and regulate the lateral movement of the plate vise 3, and then bite the bite end side of the printing plate to the bite end side plate vise (not shown) to bite it. Operate the jack bolt of the vise on the edge side plate to tension the printing plate in the vertical direction. When the rotating member 14 is in the position shown in FIG. 5, the plate vise 3 is movable in the left-right direction within a certain range, but when the rotating member 14 is in the position shown in FIG. The rotating member 14 is locked by the wall surface 15 of the regulating body 16 so as not to move to the left and right at all, and the plate vise 3 fitted with the immovable rotating member is also fixed to the left and right. . After that,
The basic position of the printing plate with respect to the plate cylinder is determined by tensioning the printing plate vertically with the jack bolts 9. In this state, test printing is performed to check the register. For the fine adjustment of the plate position after the trial printing, the adjusting means provided in the bearing portion of the plate cylinder in the left-right direction and the vertical direction, or the jack bolt and the bite-side plate manipulator (not shown) of the bite side plate vise The force jack bolt 9 can adjust the vertical direction and the twist of the plate.

7 to 9 show another example in which the cross-sectional shape of the lower portion of the rotating member 14 is different.

In order to rotatably fix the rotating member 14 to the vise table 4, a rotating member holding plate 17 having a cutout portion that fits into the constricted portion 11 is attached.

FIG. 10 shows an example in which the head portion 10 of the rotating member 14 has another shape. A part of the cylindrical head portion is obliquely cut and a hole 18 is provided in the inclined surface portion, and a bar is inserted into the hole 18 and turned. This is an example in which the moving member 14 is easily rotated.

[Effect of device]

The conventional positioning of the bite-side plate vise in the left-right direction is a positioning method that uses the side bolts provided on both sides of the scale plate, the matching mark, and the plate vise, depending on the feeling of the operator.
On the other hand, according to the present invention, even if different workers perform the positioning work, the positioning work can always be performed accurately and with one touch, and it is very effective in shortening the print preparation time.

[Brief description of drawings]

FIG. 1 is a plan view of a vise of the present invention with a part omitted, FIG. 2 is an elevation view of the vise of the same as above, FIG. 3 is a partial elevation sectional view taken along the line I--I of FIG. FIG. 7 is a plan sectional view taken along the line II-II of FIG. 3, FIGS. 5 and 6 are views for explaining the relative positions of the rotating member and the rotating member regulating body, and FIGS. Is a view showing an example in which the sectional shape of the lower part of the rotating member is different, and FIG. 10 is a side view showing an example in which the head shape of the rotating member is different. DESCRIPTION OF SYMBOLS 1 ... Plate cylinder, 2 ... Plate cylinder notch concave bottom wall, 3 ... Bite vise side plate vise, 4 ... Vise base, 14 ... Rotating member, 15 ... Wall surface, 16 ...
Rotating member restriction body

Claims (1)

[Scope of utility model registration request] 1. A plate vise for fixing a printing plate to a plate cylinder, which is mounted in a notched concave portion of a plate cylinder of a sheet-fed offset printing machine, and is a bite side which is adjustably attached to left, right, front and rear. A plate which is rotatably pivotally mounted on a plate vise and whose lower part of the shaft fitting portion is formed with a long diameter part and a short diameter part is provided, and the plate is opposed to the rotation member. The bite-side plate vise is provided on the bottom wall of the cylinder cutout recess by providing a rotating member regulating body that forms a wall surface in the axial direction of the plate cylinder at an interval equal to the length of the long diameter part of the lower part of the rotating member. Bite-side plate vise of a sheet-fed offset printing machine equipped with a fixture that fixes in the axial direction.