JPH0425326Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a screen printing machine that prints on printed matter placed on a table by sliding a squeegee under pressure on a screen plate. In particular, it relates to the table device.

(Prior Art) Generally, when printing for printed circuit boards using this type of screen printing machine, pattern printing is first performed by connecting a large number of boards, then resist printing is performed on each board, and then Next, mark printing is performed. At this time, since the substrate is removed from the table after each printing, it is necessary to view the screen plate from above and correctly align the substrate placed on the table with the screen plate during the next printing. In this case, if the top surface of the table is dark, alignment work is difficult, so conventionally, as shown in Figure 7,
A plurality of fluorescent lights 42 are installed inside the table 41 to brighten the upper surface of the table 41.

(Problem to be solved by the invention) However, in this conventional configuration, the table 41
In order to brighten a wide area of the upper surface, it is necessary to increase the thickness of the table 41, which poses the problem of increasing the size of the entire table 41. In particular, table 41 is screen version 4
3. In a screen printing machine configured to move between a printing position on the lower side and a setting position remote therefrom, there is a problem that not only the table 41 but also the entire machine becomes large.

Structure of the invention (means for solving the problem) This invention was made with attention to the above problem, and is a screen printing machine that prints on printed matter placed on a table by applying pressure and sliding of a squeegee on a screen plate. In this, the table includes a plate-shaped print base, a light source support plate superposed on the print base and having a large number of recesses on the upper surface, and a printed matter made of a transparent synthetic resin material superposed on the light source support plate. A planar light source member that emits light toward the screen plate is provided in a large number of recesses of the light source support plate.

(Function) Therefore, in the table device of this invention,
The planar light source member 17 allows the thickness of the table 3 to be made extremely thin, and accordingly, the screen printing machine as a whole can be configured compactly.

(Example) Hereinafter, an example that embodies this idea will be described.
This will be explained based on FIG.

As shown in Fig. 2, the screen printing machine of this embodiment is composed of a lower frame 1 and an upper frame 2 that can be raised and lowered relative to the lower frame 1. A table 3 is supported so as to be movable back and forth between a printing position shown by a solid line in the figure and a setting position shown by a chain line. A screen plate 4 is supported on the upper frame 2, and a squeegee 5 and a doctor 6 are respectively disposed on the screen plate 4 so as to be able to slide back and forth. Then, as the squeegee 5 slides under pressure on the screen plate 4, printing is performed on the printed matter on the table 3, and the doctor 6
The ink is returned by pressure sliding.

As shown in FIG. 1, the table 3 is composed of a rectangular print base 8, a light source support plate 9, and a printed matter mounting plate 10, which are arranged on a sixth plate.
As shown in the figure, they are assembled and held so that they can be disassembled via a pair of upper and lower fixtures 11 at each corner in a stacked state. The print base 8 is composed of a lower base 8a and an upper adjustment part 8b, and a plurality of positioning handles 13 are provided on the front surface of the base 8a.By rotating each handle 13, the base 8a can be adjusted. On the other hand, the front and back, left and right, and tilt positions of the adjustment portion 8b are adjusted within the same plane.

The light source support plate 9 is made of a synthetic resin plate such as a base light, and has a large number of recesses 1 on its upper surface.
5 is formed, and a through hole 16 is provided at one end thereof. A thin plate-like planar light source member 17 is fixed in each recess 15 so as to be flush with the upper surface of the light source support plate 9, and its terminal 18 is connected to the through hole 16.
and is connected to a power supply connection terminal 19 via a conductive wire (not shown) wired on the lower surface of the light source support plate 9.

As shown in FIG. 3, each planar light source member 17 in this embodiment includes a white reflective layer 22 made of a titanium-based white glaze and a high dielectric material such as barium titanate or titanium oxide on an iron substrate 21; A light-emitting layer 23 made of a phosphor and high dielectric constant transparent glass, a transparent conductive film 24 whose main component is tin oxide, and a light-transmitting protective layer 25 are laminated in order, and the total thickness is about 1 to 1.9 mm. mm. Then, the iron substrate 2
When an alternating current voltage is applied between one terminal 18a provided on the substrate 1 and the other terminal 18b connected to the transparent conductive film 24, the light emitted from the luminescent layer 23 causes the printed matter mounting plate 10 to The screen plate 4 is irradiated through the screen plate 4.

On the other hand, as shown in FIGS. 1, 4, and 5, the printed matter mounting plate 10 is made of a transparent synthetic resin material such as acrylic, and has a plurality of guide grooves 27 on its upper surface.
is recessed. This guide groove 27 has 2 or 3
The positioning members 28 (only one is shown in FIGS. 4 and 5) are slidably fitted so as to be flush with the upper surface of the printed matter placement plate 10. A pair of elastic pieces 30 are integrally formed at one end of each positioning member 28 via a slit 29, and each positioning member 28 can be moved to any position in the guide groove 27 by means of a screw 32 that is screwed between both elastic pieces 30. It is becoming fixed. In addition, an insertion hole 33 is provided through the other end of the positioning member 28, and a pin 35 is removably fixed to the insertion hole 33 through a set screw 34 with its upper end projecting upward. has been done. A printed circuit board P as a printed matter is placed on the upper surface of this printed matter mounting plate 10, and a plurality of positioning holes H provided in the printed circuit board P fit into the pins 35 of each of the positioning members 28. This allows the printed circuit board P to be positioned and held on the printed matter placement plate 10.

By the way, when printing on a printed circuit board P with the screen printing machine of this embodiment configured as described above, the printed circuit board P is placed on the upper surface of the printed matter mounting plate 10 on the table 3, and the printed circuit board P is It is held in a fixed position by each of the positioning members 28, and first, pattern printing is performed by the cooperation of the screen plate 4 on which the pattern image is drawn, the squeegee 5, and the doctor 6. Next, when performing resist printing on this printed circuit board P, place the printed circuit board P on which the pattern has been printed on the table 3, look at the screen plate 4 from above, and check that the resist image on the screen plate 4 corresponds to the pattern of the printed circuit board P. The printed circuit board P is aligned by operating each of the alignment handles 13 so as to match the alignment. At this time, since the light emitted from each plane light source member 17 passes through the transparent printed circuit board P and illuminates the screen plate 4, the operator can see the images of the screen plate 4 and the printed circuit board P, respectively. It is possible to clearly check the position and perform alignment work easily.

In addition, in the table device of this embodiment, the light source support plate 9 and printed matter mounting plate 10 are removable from the print base 8 via the fixture 11, so that the table 3 does not require a light source. In the case of printing work that does not require printing, the light source support plate 9 and printed matter mounting plate 10 can be removed, printing paper can be placed directly on the top surface of the print base 8, and printing can be performed. Incidentally, in a conventional printed circuit board table device equipped with a fluorescent light, it was necessary to remove the entire table and replace it with another paper table, which was a very troublesome task.

Effects of the invention As detailed above, according to this invention, the table is provided with a flat light source member, and the thickness of the table can be made extremely thin, thereby making the entire screen printing machine compact. be able to. In addition, with this invention, in the case of printing that does not require a light source, the light source support plate and printed matter placement plate can be removed and printing paper can be placed directly on the top surface of the print base 8 for printing. This has the excellent effect of increasing the versatility of the table without the need to replace the entire table.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a table device showing an embodiment of this invention, Fig. 2 is a front view showing the entire screen printing machine, and Fig. 3 is a longitudinal sectional view showing the configuration of a flat light source member. , FIG. 4 is a partial plan view of the table, FIG. 5 is an enlarged sectional view taken along the line A-A in FIG. FIG. Table...3, Screen plate...4, Squeegee...5, Print base...8, Light source support plate...
...9. Printed material placement plate...10. Planar light source member...
17, Guide groove...27, Positioning member...28,
Pin...35, Printed circuit board as printed material...
P, that hole...H.

Claims (1)

[Claims for Utility Model Registration] 1. Printed matter P placed on the table 3 as the squeegee 5 slides under pressure on the screen plate 4
In a screen printing machine that performs printing, the table 3 includes a plate-shaped print base 8, a light source support plate 9 superimposed on the print base 8 and having a large number of recesses 15 on the upper surface, and a light source support plate 9 on the light source support plate 9. A printed matter mounting plate 10 is made of a transparent synthetic resin material polymerized to Table device for screen printing machine featuring features. 2. The light source support plate 9 and printed matter mounting plate 10 are
The table device for a screen printing machine according to claim 1, wherein the print base 8 is removably assembled onto the table via a fixture 11. 3 A guide groove 27 is formed on the upper surface of the printed matter placement plate 10 of the table 3, and a positioning member 28 equipped with a pin 35 that fits into the hole H of the printed matter P is attached to this guide groove 27. The table position of the screen printing machine according to claim 1, which is supported in a position adjustable manner by a pair of integrally formed elastic pieces 30 and a screw 32 screwed between both elastic pieces 30.