JPH08300614A - Table device for printing - Google Patents

Abstract

PURPOSE: To provide a table device for printing, with which a plurality of matters to be printed, the intervals between positioning holes and their diameters of which are different from one another, can be dealt with. CONSTITUTION: This table device for printing is equipped with a plurality of pairs of guide pins 3a-3f, which are arranged so as to project their tip parts through holes 2a-2f provided on a seating surface 1-1 and intervals between the respective pairs are different from one another, and lifting means for projecting or housing every pair of the respective pairs of the guide pins 3a-3f beyond or below the seating surface 1-1. Further, the tip parts of the guide pins 3a-3f are made into shapes, each of which is formed by piling up columns having different radius, so as to change the effective pin diameter by changing the amount of projection of the guide pins 3a-3f.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus, and more particularly to a printing table apparatus having a positioning mechanism for a printing medium suitable for industrial screen printing.

[0002]

2. Description of the Related Art In recent years, screen printing technology has been widely applied to the manufacture of electronic devices. For example, the membrane switch (key touch switch circuit), which has been attracting attention recently.
Is rapidly becoming popular because the shape of the switch can be adapted to the design of applied products. This membrane switch is manufactured by screen-printing a conductive paste on a film of polyester or the like. Also, in the manufacturing process of the printed wiring board, coating of solder resist, marking of coordinates or component mounting position on the board,
Placing the solder paste on the soldering land is performed by screen printing.

In such industrial screen printing, there are various types of shapes to be printed, and in order to cope with this, for example, a printing table device used in a conventional screen printing machine for printed circuit boards is expensive. In order to perform accurate positioning, a table or table top plate (also called an application table) provided with guide pins that can be raised and lowered was provided at a position corresponding to a mounting hole or a positioning hole of a printed circuit board.

In the conventional printing table device, as shown in FIG. 5, when positioning the printed circuit board 10 which is the object to be printed, the tip of the guide pin 3 extends from the hole 2 provided in the mounting surface 1-1. After the pin is projected and the pin is positioned through a positioning hole (using a mounting hole) provided in the printed board, the tip of the guide pin is lowered from the mounting surface so as not to interfere with printing. An air cylinder has been used to raise and lower the guide pin.

Since the mounting holes provided on the printed circuit board are usually different in position and size depending on the type of the printed circuit board, each time the type of the printed circuit board to be printed changes, a printing table or The top plate of the printing table was newly made.

[0006]

However, producing the printing table or the printing table top plate portion for each type of the printing object having the different guide pin positions has a problem that the manufacturing cost becomes high. . Further, when the print table or the print table top plate portion is replaced for each type of print target, the replacement time becomes a print stop time, which causes a problem in improving the productivity of screen printing.

In view of the above problems, it is an object of the present invention to provide a printing table device capable of realizing different guide pin intervals or different guide pin diameters on the same printing table regardless of the type of printed material. is there.

[0008]

To achieve the above object, the present invention has the following constitution. That is, the invention according to claim 1 is a printing table device for performing positioning on the mounting surface of the printing target object by passing a guide pin protruding from the hole of the mounting surface through a hole provided in the printing target object. A plurality of pairs of guide pins, which are arranged so that the tip portions thereof can project from the holes and have different intervals for each pair, and the guide pins of each pair, are projected from the mounting surface for each pair. And a lifting / lowering means for storing below the mounting surface.

According to a second aspect of the present invention, in the printing table device according to the first aspect, the elevating means can change the amount of protrusion of each pair of guide pins from the mounting surface in a stepwise manner. The tip end portion of the guide pin has a diameter of several stages so that the diameter of the mounting surface level increases as the amount of protrusion from the mounting surface increases.

[0010]

With the above structure, in the printing table device according to the first aspect of the present invention, the set of guide pins having the intervals corresponding to the holes provided in the object to be printed are selectively projected from the mounting surface,
It is possible to perform positioning of the printing material having different positioning hole intervals.

Further, in the printing table device according to a second aspect of the present invention, by changing the amount of protrusion of the guide pin from the mounting surface, the pin diameter effective for positioning is changed to accommodate different hole diameters of the printed material. be able to.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a partial sectional perspective view showing the construction of a first embodiment of a printing table device according to the present invention.

In FIG. 1, a plurality of pairs of holes 2a and 2b, 2c and 2d, 2 having different intervals are provided on a printing table top plate 1 whose upper surface is a mounting surface 1-1 of a material 10 to be printed.
, e and 2f, ... Are provided. Each pair of holes has a pair of guide pins 3a and 3b, 3c and 3d, 3e, respectively.
, 3f, ... Are provided. The air cinder 4 is vertically fixed to the lower surface of the printing table top plate 1 by a support fitting 5. A hexagonal nut shape 3-1 is formed in the lower portion of each guide pin 3, and the tip end portion of the piston rod 6 of the air cylinder 4 is screwed into the hexagonal nut shape 3-1. As a result, the movement of the piston rod 6 of the air cylinder 4 driven by the compressed air supplied from a compressed air source (not shown) immediately becomes the movement of the guide pin 3.

Next, the operation of this embodiment will be described. A control device (not shown) controls each air cylinder so that the tip end portion of the guide pin moves in and out of the mounting surface 1-1 for each pair of guide pins. When printing a certain printing material, a guide pin pair having a pin interval equal to the positioning hole interval is selected, and the corresponding air cylinder 4 is driven. The unselected guide pin pair remains stationary in the retracted position. Driven air cylinder piston rod 6
Pushes up the guide pin 3 screwed to the tip thereof from the storage position below the mounting surface to move the tip thereof to the mounting surface 1-1.
Make it more prominent.

Next, the material to be printed is placed on the placing surface.
At this time, the printing object is positioned by passing the positioning holes of the printing object through the guide pins. Then, the guide pin is lowered to the storage position so as not to interfere with printing.
Then, printing is performed, and after the printing is completed, the selected guide pin pair is raised again.

When the shape of the printed material is changed, a new guide pin pair having a pin spacing corresponding to the positioning hole spacing of the new printed material is newly selected, and similar positioning is performed by this guide pin pair.

Next, a second embodiment of the present invention will be described. Second
The embodiment is different in that it uses a guide pin 13 having a cylindrical portion with a different radius at its tip as shown in FIG. 2 and that an intermediate stop type air cylinder is used for the air cylinder 14, and other than that. The components and arrangement are the same as in the first embodiment, and FIG. 1 is applied.

FIG. 2 is a front view (a) and a plan view (b) showing the detailed shape of the tip of the guide pin 13 used in the second embodiment. The tip portion of the guide pin shown in FIG. 2 has a columnar shape whose diameter gradually decreases toward the tip, a large diameter portion (guide pin main body portion) 13-2, and a middle diameter portion 13
-3, the small diameter portion 13-4 is sequentially stacked, and the effective diameter of the guide pin is changed by controlling the amount of protrusion of the tip of the guide pin from the mounting surface in stages. is there. In the shape in which the cylinders are stacked, the centers of the holes are constant when they are arranged coaxially. Further, as shown in FIG. 3, the side surfaces of the cylinders may be arranged so as to be in contact with the same surface.

The air cylinder 14 is a two-stage type air cylinder in which two air cylinders are integrated in series and capable of intermediate stop. The piston rod 6 is driven by compressed air supplied from a compressed air source (not shown). It Since the intermediate stop type is used for the air cylinder, the position in the height direction of the guide pin can take three positions, the retracted position, the intermediate position, and the high position, corresponding to the stop position of the piston rod. it can.

In the storage position, the top of the guide pin is the mounting surface 1.
-1 or less, an intermediate position is a position where the small diameter portion 13-4 of the guide pin projects above the mounting surface 1-1, and a high position is a medium diameter portion 13-3 of the guide pin. Is a position protruding above the mounting surface 1-1. The cross-sectional view of FIG. 4 shows a state in which the guide pin is positioned by the high position. In this way, it is possible to deal with substrates having different positioning hole radii.

Although the preferred embodiment has been described above, this is not meant to limit the invention. In the embodiment, each guide pin is moved up and down by using an air cylinder as the lifting means, but the guide pin may be moved up and down by using a cam device that realizes a plurality of guide pin protrusion amounts. The guide pin pair may be moved up and down not only by a separate lifting device but also by a mechanically connected lifting device.

[0023]

As described above, according to the present invention,
There is no need to create a printing table or a printing table top plate portion for each type of printing target object having different positioning holes, and it is possible to prevent an increase in manufacturing cost.

Further, it is not necessary to replace the printing table or the printing table top plate portion for each kind of the printing object, and there is an effect that the productivity of the screen printing is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main configuration of a printing table device according to the present invention.

FIG. 2 is a side view and a plan view showing a detailed shape of a tip portion of a guide pin.

3A and 3B are a side view and a plan view showing a detailed shape of a tip portion of a guide pin.

FIG. 4 is a cross-sectional view showing a set state of an object to be printed.

FIG. 5 is a perspective view showing a structure of a conventional printing table device.

[Explanation of symbols]

1 Printing table top plate 2 hole 3 Guide pin
4 Air cylinder 5 Mounting bracket 6 Piston rod

Claims (2)

[Claims] 1. A printing table device for performing positioning on the mounting surface of the printing object by passing a guide pin protruding from a hole provided on the mounting surface through a hole provided in the printing object, A plurality of pairs of guide pins, which are arranged so that the tip portions thereof can project from the holes and have different intervals for each pair, and the guide pins of each pair are projected from the mounting surface for each pair. A printing table device comprising: an elevating means that is stored below a mounting surface, and a printing table device. 2. The elevating means can change the projecting amount of each pair of guide pins from the mounting surface in a stepwise manner, and the tip end portion of the guide pin has a projecting amount from the mounting surface. 2. The printing table device according to claim 1, wherein the printing table device has a diameter of several stages so that the diameter of the mounting surface level increases with an increase in the number.