JPH0425327Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a screen surface adjustment device in a screen printing machine.

(Background Art and Problems Therewith) In screen printing, the parallelism between the printing surface of a substrate placed below the screen and the screen surface is an important factor for accurate printing.

In addition, especially when performing multicolor printing, the screen is replaced for each color of ink, so in addition to the above-mentioned parallelism, position adjustment is also required in the XY directions, and more preferably rotation within a predetermined plane. Is required.

Conventionally, such adjustment of parallelism and position has been carried out on the side of an elevating table on which the printing material is placed and raised until the printed surface comes into contact with the lower surface of the screen during printing.

That is, the screen frame is simply fixedly arranged above the elevating table in a removable manner, and parallelism and positioning adjustment devices in the X and Y directions are provided on the elevating table side.

However, providing such a positioning device on the elevating table side not only complicates the device because it needs to be provided in conjunction with the elevating mechanism, but also because the screen is above the elevating table, the screen surface is There have been problems in that it is difficult to perform positioning operations while looking, it takes a long time to make adjustments, and it is difficult to perform accurate positioning.

Furthermore, conventionally, the screen has been fixed to the printing press by tightening the screen frame on which the screen is stretched using tightening screws.

However, in order to secure the screen frame to the printing press in a well-balanced manner, at least four tightening screws are required, and when tightening the screen frame, use multiple tightening screws to prevent the screen from shifting once determined. It was essential to tighten each part evenly, which caused the problem that the work was difficult.

The present invention was developed to solve the above problems, and its purpose is to easily and accurately adjust the position between the printing surface and the screen surface, and to easily attach the screen to the printing machine. Another object of the present invention is to provide a screen plate mounting device for a screen printing machine that can be fixed accurately.

(Summary of the invention) The invention has the following configuration to achieve the above object.

That is, a pair of base frames 14, 14 are fixed in parallel to the main body of the printing press at a constant interval, and the base frames 14, 1
A pair of support plates 18, 18 having longitudinally long shaft holes 22, 22 facing each other in the 4 and having an L-shaped cross section.
The screen frame 34 to be placed facing the
Screw shafts 20, 2 protruding from the back surfaces of the support plates 18, 18 with a spacing slightly larger than the corresponding width of the screw shafts 20, 2.
0 through the shaft holes 22, 22 and tightened, the screw shafts 20, 2 are attached to the base frames 14, 14, respectively.
0, and vertically movable along the shaft holes 22, 22, and is located above the screen frame 34 placed on the lower side of the support plates 18, 18. Each plate holder 36, 36 is rotatably pivoted near the center, and is screwed into the vicinity of each end of the plate holder 36, 36 so as to be able to protrude in the vertical direction. Tightening screws 40a, 40 that come into contact with and fix 34 from above
b, 40c, and 40d.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an explanatory diagram showing an overview of the entire screen printing machine.

Reference numeral 10 denotes a table on which the printing material is placed, and is moved up and down by a lifting device.

Reference numeral 12 denotes a screen, which is positioned and fixed to a base frame 14 which is positioned and fixed above the table 10 as will be described later.

16 is a squeegee, which is provided so as to be able to reciprocate along the screen 12.

Next, the screen adjustment device will be explained based on FIGS. 2 and 3.

The base frames 14, 14 are spaced apart from each other by a certain distance.
The book is fixed parallel to the printing press body.

Support plates 18, 18 are provided with an L-shaped cross section, and are arranged to face the inner surfaces of the base frames 14, 14, respectively. That is, a screw shaft 20 is provided protruding from the center of the back surface of the support plates 18, 18, and this screw shaft 20 is inserted through a vertically long shaft hole 22 provided in the base frames 14, 14, and is inserted into the outer surface of the base frames 14, 14. A tightening nut 24 is screwed onto the threaded shaft 20 of the base frame 1.
It is fixed at 4,14. Further, two projecting pins 26a, 26b (one not shown) are provided on the back surfaces of the support plates 18, 18, respectively, and these projecting pins 26a,
26b fits into vertically long elongated holes 28a, 28b provided in the base frames 14, 14 to form elongated holes 28a, 28.
guided along b. Reference numerals 30a and 30b are adjustment screws whose tips enter into the elongated holes 28a and 28b and come into contact with the projecting pins 26a and 26b. The adjusting screws 30a and 30b allow fine adjustment of the degree of inclination in the front-rear direction (as shown in FIG. 1) of the movable plate 18, which is rotatable about the screw shaft 20 mentioned above.

The other set of adjustment screws 30c and 30d similarly finely adjust the degree of inclination of the other support plate 18 in the front-rear direction.

A screen frame 3 in which a screen 32 is stretched on both lower sides of the support plates 18, 18 arranged oppositely.
4 is placed. Further, the distance between the vertical parts of the support plates 18, 18 is set larger than the corresponding width of the screen frame 34 on which the screen frame 34 is placed.
4, gaps A, A are created between the outer periphery. Therefore, the screen frame 34 can freely move within the range of the gaps A and A (including rotation within the mounting plane).

In addition, the base frames 14, 1 of the two support plates 18, 18
By changing the tightening height position relative to 4, it is possible to adjust the inclination angle of the screen frame 34 in the left-right direction in FIG.

Reference numerals 36 and 36 designate plate holders, which are fixed to the support plates 18 and 18 by screws 38 so as to be rotatable around the screws 38 (by loosening the screws 38, they can be freely rotated; (secured in position by tightening).

Numerals 40a, 40b, 40c, and 40d are tightening screws, which are screwed vertically into the plate holders 36, 36, and whose lower ends connect the screen frame 34 to the support plates 18, 40d.
It is designed to be tightened on the lower side of 18.

In addition, another screw hole is provided in parallel to the screw holes provided in the plate holders 36, 36 and into which the tightening screws 40b, 40d are screwed, and also,
Another screw hole is provided in parallel to the screw hole into which the screw 38 that rotatably connects the support plate 6 to the support plates 18, 18 is screwed. With this, screen frame 3
4 have different sizes, the screw holes can be selected in accordance with the screen frame and the screen frame can be appropriately fixed.

The present invention is configured as described above.

Next, a procedure for fixing the screen frame 34 will be explained.

First, tighten the screws 40a, 40b, 40c, 40d
are loosened, and the screen frame 34 is inserted into the gap between the lower sides of the support plates 18, 18 and the lower surfaces of the plate holders 36, 36.

Next, loosen the tightening nuts 24, 24, and remove the support plate 1.
Adjust the horizontal inclination of the screen frame 34 so that it is parallel to the printing surface of the printing material at the height position of the screen frame 34, that is, in FIG. Temporarily tighten. Next, operate the adjustment screws 30a, 30b, 30c, and 30d to adjust the inclination of the support plates 18, 18 in the front-rear direction (upper part of FIG. 2), so that the inclination of the screen frame 34 in the front-rear direction is aligned with the printing surface of the printing material. Align it so that it is parallel to the

If necessary, by repeating the above operation several times, the screen surface of the screen 32 stretched over the screen frame 34 can be set to be accurately parallel to the printing surface of the printing material.

Then, the screen frame 34 is moved back and forth and left and right within the gaps A, A, and if necessary, rotated within the above parallel plane to accurately set the printing position.

Next, the procedure for fixing the screen will be explained.

First, the tightening screws 40b and 40d are screwed in until they come into contact with the surface of the screen frame 34. At this time, the screws 38, 38 are in a loosened state, and the plate pressers 36, 36 are in a state where the screws 38, 38 are loosened.
It is in a state where it can rotate around 38.

Then, when the tightening screws 40a, 40c are screwed in, the end surfaces of the tightening screws 40a, 40c abut the screen frame 34 on the surface of the screen frame 34 and tighten the screen frame 34, and at the same time, the plate pressers 36, 36 tighten the screw 38. The screws 40b and 40d abut on the surface of the screen frame 34 and tighten the screen frame 34.

That is, when the screen frame 34 is tightened with one of the tightening screws 40a, 40c, the other tightening screws 40b, 40d, which are disposed on the opposite side of the plate holders 36, 36 around the screw 38, are also tightened at the same time and evenly. The screen frame 34 can be tightened.

Therefore, the operator does not have to tighten each of the four screws equally, but can obtain the same effect as if he had tightened four screws evenly by tightening two screws evenly. Because you can
The screen frame 34 can be easily fixed,
You can improve work efficiency.

Also, by tightening one tightening screw, the screen frame 3 can be fixed at two points by two tightening screws.
4 can be pressed evenly, so the screen frame 34 can be tightened so that it does not shift after position adjustment.

(Effects of the invention) As described above, according to the invention, it is possible to adjust the position of the screen not only in terms of its parallelism but also in the XY directions and rotation within a predetermined plane, and multicolor printing can be performed with high precision.

Further, the positional relationship between the printing surface of the printing material and the screen surface can be adjusted after observing through the screen, and the positioning of the screen can be performed in a short time and with high precision.

According to the present invention, by tightening one screw, the screen frame can be evenly held at two points by the two tightening screws, so the screen frame can be easily tightened without shifting. It has the remarkable effect of being able to be fixed.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and the invention is not limited to these embodiments. Of course, many modifications can be made within the system.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the entire screen printing machine, FIG. 2 is a perspective view showing a screen surface position adjustment device, and FIG. 3 is a front view thereof. 10...Table, 12...Screen, 14
... Base frame, 16 ... Squeegee, 18 ... Support plate, 20 ... Screw shaft, 22 ... Shaft hole, 24 ... Tightening nut, 26a, 26b ... Projection pin, 28a,
28b...Long hole, 30a, 30b, 30c, 30
d...adjustment screw, 34...screen frame, 36...
...Plate holder, 38...Screw, 40a, 40b, 40
c, 40d...Tightening screw.

Claims (1)

[Claims for Utility Model Registration] A pair of base frames 14, 14 are fixed in parallel to the printing press body at a constant interval, and vertically long shaft holes 22, 2 are provided in the base frames 14, 14.
A pair of supporting plates 18, 18 having an L-shaped cross section are provided facing each other.
Screw shafts 20, 20 protruding from the back surfaces of the support plates 18, 18 are inserted into the shaft holes 22, 22, facing each other and with a gap slightly larger than the width corresponding to the screen frame 34 to be placed. By tightening the
The screen frame is provided to be rotatable about the screw shafts 20, 20 with respect to the base frames 14, 14, respectively, and to be movable up and down along the shaft holes 22, 22, and placed on the lower sides of the support plates 18, 18. 34, plate pressers 36, 36 are provided on each of the support plates 18, 18, rotatably pivoted near the center, and upper and lower plates are provided near the ends of each of the plate presses 36, 36. They are screwed together so that they can protrude in the direction, and the end surface is connected to the screen frame 3.
A tightening screw 40a that abuts and fixes 4 from above,
A screen plate device for a screen printing machine, characterized in that 40b, 40c, and 40d are provided.