JP2583189Y2 - Printing pattern alignment device in automatic positioning system of fully automatic screen printing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a printing pattern formed on a screen printing plate set in a screen printing machine and a correspondence between a printing position adjusted between a printing substrate to be inputted and a printing pattern adjusted. The present invention relates to an apparatus for aligning a printing pattern in an automatic positioning system of a fully automatic screen printing machine, which can ensure that a screen printing plate having a printing pattern corresponding to a printing position can be easily prepared.

[0002]

2. Description of the Related Art A screen printing machine is used for printing a resist on a printed circuit board and the like. In this screen printing machine, a printed circuit board is used as a work and a position corresponding to a printing position is determined. There has also been proposed a fully automatic type which performs a series of printing processes of charging, printing, coating and discharging.

In this fully automatic type screen printing machine, it is extremely important to match a print pattern printed and applied to a work automatically put on a print table with a print position on the work. . Therefore, the initial positioning of the work corresponding to the printing position before input, which is performed prior to the continuous printing operation, matches the printing pattern formed on the screen (screen) of the screen printing plate set on the printing table. The work is reciprocated several times between an alignment and positioning device provided with an image processing system using a CCD camera for positioning the work before being put in, and a print table where the put in is stopped and positioned. It is what is done in. At this time, the alignment position of the work on the aligning and positioning device is centered on the center of the aligning and positioning device.
In accordance with the image processing taken by the CD camera, the workpiece is moved and corrected in the X and Y directions. On the other hand, the screen printing plate set on the printing table is also adjusted and fixed so that the center of the printing table is centered. I have.

[0004]

The work to be positioned itself is carried into a substantially specified range on the alignment positioning device. Therefore, the alignment is slightly finely adjusted when aligning with the printing position. Positioning is completed.
On the other hand, after the screen printing plate is loaded on the printing table, it is fine-adjusted while manually moving it so that the screen printing pattern matches the work tentatively put on the printing table. This is extremely troublesome because it is set at a predetermined position.

[0005] In addition, the printing pattern created on the screen of the screen printing plate is usually arranged at the center of the screen printing plate. Since the work of determining the center position is not completely performed every time, the center position may be slightly deviated from the initial position to be created. In this case, the screen printing plate positioning and fixing work to be performed while being loaded on the printing table and matching with the work has to be individually performed for fine adjustment corresponding to each screen printing plate, which is more troublesome. It had become something.

In view of the above, the present invention has been devised in view of the above-described circumstances, and ensures that a screen printing plate inserted and set on a printing table is securely positioned at a predetermined position on the printing table. It is assumed that the positioning is fixed, and it is possible to easily perform the aligning and positioning work for the work to be put in accordance with this, and the print pattern created by using the pattern film is also formed at a fixed position on the screen. The present invention aims to rationalize the positioning work from the time of plate making to the time of printing, and to further provide a printing pattern positioning device in an automatic positioning system of a fully automatic screen printing machine capable of automatically setting a screen printing plate. With the goal.

[0007]

In order to achieve the above-mentioned object, in the present invention, the screen printing plate S automatically loaded under the screen printing plate S through the screen printing plate S held and set on the printing table 3. An apparatus 10 for aligning a print pattern formed on a screen printing plate S in a fully automatic screen printing machine for printing on a work W, which is arranged at a fixed position with respect to a print table 3,
The screen printing plate S is provided with a clamp mechanism 25A having a clamp pin 28A for fitting and pressing the frame.

[0008] A positioning device 10 is also provided, which includes a front and rear base member 11 mounted between left and right support frames 2 before and after a screen printing machine, and is mounted between the base members 11. The left and right clamp members 12 slidably adjusted in the left and right direction according to the width of the screen printing plate S, and one of the front and rear frame portions corresponding to the front and rear width of the screen printing plate S is regulated and stopped. Thus, it is provided with the stopper means 21 attached to the clamp member 12, and the clamp mechanism 25A for fitting and pressing the positioned screen printing plate S.

The clamp member 12 includes a clamp pipe 13 which is slid left and right by a slide means 15.
And a clamp angle member 14 having a substantially L-shaped cross section fixed to the center side surface of the printing table 3 in the clamp pipe 13.
Is a slide cylinder 16 fixed to the base member 11.
And a joint member 17 connected to the clamp pipe 13 and connected to the cylinder rod of the slide cylinder 16, and a guide member 18 for guiding the clamp pipe 13 in the left-right direction.

The clamp mechanism 25A includes a clamp member 12
Clamp cylinder 26 fixed to clamp pipe 13
Clamp arm 27A linked to cylinder rod A
The positioning holes 5 formed in the frame of the screen printing plate S
The positioning clamp pin 28 </ b> A having a lower end shaped like a weight so as to fit into the connector can be connected.

The stopper means 21 is provided with a stopper plate 22 provided at the back of the clamp angle member 14 so that the rear frame, which is the back of the screen printing plate S loaded therein, is brought into contact with the stopper. A stopper pin 23 provided on the clamp angle member 14 such that the frame on the rear side of the printing plate S can come into and out of contact with the rear surface of the printing plate S can be provided.

Further, a jig set on the screen printing plate S by aligning the pattern film F with a pattern film F for forming a print pattern placed on the screen of the screen printing plate S interposed therebetween. It is provided with positioning means 30 having positioning pins 31 for fitting the plate P together with the frame of the screen printing plate S.

[0013]

According to the present invention, a screen printing plate S having a predetermined size selected at the time of printing is slid onto a printing table 3 in a printing pattern positioning apparatus in an automatic positioning system of a fully automatic screen printing machine. At this time, the sliding means 15 sets the holding width suitable for holding the screen printing plate S by sliding the left and right clamp members 12 in the left and right direction.

When the screen printing plate S is slid on the clamp member 12, the stopper plate 22 of the stopper means 21 holds the large screen printing plate S, and the projected stopper pins 23 hold the small screen printing plate S. The stoppage is regulated respectively and temporarily stopped on the print table 3.

The operation of the clamp mechanism 25A after the temporary fixing is as follows.
The clamp pin 28A fits into the positioning hole 5 of the screen printing plate S and presses it to position and hold the screen printing plate S and, consequently, the printing pattern at a predetermined position corresponding to the printing position. Reliable alignment of the print pattern allows for accurate pre-printing and alignment positioning operations prior to a continuous printing operation.

The positioning holes 5 of the screen printing plate S
Is used as a mark for alignment with the jig plate P when creating a print pattern by using the pattern film F formed on the screen printing plate S. At the same time, the positioning of the pattern film F on the screen of the screen printing plate S by the jig plate P is ensured, and the printing film S is accurately corresponded to the printing position.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In the drawings, reference numeral 1 denotes a work W such as a printed circuit board, which is an object to be printed, which is processed by an image processing of a CCD camera 8. This is a printing device in a fully automatic type screen printing machine which is automatically loaded and printed after being positioned in correspondence with the printing position by an alignment positioning device 7 which corrects the movement in the XY directions. The printing apparatus 1 includes, for example, a printing table 3 supported on a column frame 2 erected at four corners, and a screen printing plate S set on the printing table 3.
The screen printing plate S is supported and set by a positioning device 10, and the work W is loaded and ejected by a transfer table 6 running in the center of the printing table 3. It has become so.

That is, the positioning device 10 includes front and rear base members 11 mounted between the left and right support frames 2 and front and rear, and is mounted between the base members 11. Right and left clamp members 12 that are slid in the left and right direction according to the width,
The stopper means 21 attached to the clamp member 12 and the positioned screen printing plate S are fitted and pinched so as to regulate and stop one of the front and rear frame portions corresponding to the front and rear width of the screen printing plate S. Alternatively, it includes clamp mechanisms 25A and 25B for pressing and holding.

The base member 11 is in the form of a square pipe mounted along the left and right direction between the support frames 2 arranged on the left and right of the front part and the rear part, respectively.

As shown in FIGS. 1, 2 and 7, the clamp member 12 is fixed to a clamp pipe 13 which is slid in the left-right direction by a slide means 15, and to the center side surface of the print table 3 in the clamp pipe 13. It is composed of a clamp angle member 14 having a substantially L-shaped cross section, is formed symmetrically on the left and right sides, and is set so that the screen printing plate S is laid over the left and right clamp angle members 14. The clamp pipe 13 is formed in a substantially flat square pipe shape, and is slid and adjusted by a slide means 15 attached to the base member 11 in accordance with the left and right width of the screen printing plate S. The slide means 15 for this purpose is connected to a slide cylinder 16 fixed to the base member 11 and a clamp pipe 13 as shown in FIGS.
And a guide member 18 for guiding the clamp pipe 13 in the left and right direction. In the slide means 15, as shown in the figure, the one attached to the base member 11 arranged on the rear side is as follows.
The slide cylinder 16 and the guide member 18 are both arranged on the upper surface of the base member 11 (see FIG. 3).
Although the slide cylinder 16 is arranged on the side surface of the base member 11 and the guide member 18 is arranged on the upper surface of the base member 11, differences in these arrangement forms can be arbitrarily selected. The clamp pipe 13 is arranged in such a manner as to fit between the front and rear base members 11 via a joint member 17 slidably combined with a guide member 18 arranged on the upper surface of the base member 11. Things.

The sliding range of the clamp member 12 is one-touch by switching the switch operation so as to correspond to, for example, a large screen printing plate S having a side length of 1100 mm and a small screen printing plate S having a length of 950 mm. (In each of FIGS. 1 and 2, the left side corresponds to the large screen printing plate S, and the right side corresponds to the small screen printing plate S. As shown).

Further, the stopper means 21 is provided with a rear frame which is a back portion when the large screen printing plate S is inserted by sliding in the front-rear direction on the clamp angle member 14 of the clamp member 12. Stopper plate 22 provided at the back of clamp angle member 14 so as to be in contact with
(See FIG. 1), so that the frame on the rear side when the small screen printing plate S is mounted in a sliding manner is abutted.
A stopper pin 23 is provided on the clamp angle member 14 so as to be freely retractable (see FIGS. 1 and 4). That is, in each case, each stop regulation position is set such that the center of the screen printing plate S is located at the center on the printing table 3, and when the large screen printing plate S is set. The stopper pin 23 is immersed. The stopper pin 23 itself is connected via a floating joint to a cylinder rod of a retractable cylinder 24 fixed to the clamp member 12 of the clamp member 12, as shown in FIGS. The clamp angle member 14 is configured to be protruded and retracted from the front surface.

As shown in FIG. 1, the clamp mechanisms 25A and 25B are fixedly arranged at a fixed position with respect to the print table 3, and the clamp angle members 1 of the clamp member 12 are fixed.
The frame body of the screen printing plate S which is slid and mounted on the frame 4 is fitted from above and pressed or pressed to hold the frame on the clamp angle member 14. There are a total of four by arranging them on the front and rear, respectively.

That is, as shown in FIGS. 1, 2, 5, and 7, the fitting and pressing type clamp mechanism 25A is connected to a cylinder rod of a clamp cylinder 26A fixed to the clamp pipe 13 of the clamp member 12. A positioning clamp pin 28A having a weighted lower end so as to fit into the positioning hole 5 formed in the frame of the screen printing plate S is connected to the clamp arm 27A thus formed. Further, a clamp mechanism 2 of a type that simply presses
5B is a clamp arm 27 connected to a cylinder rod of a clamp cylinder 26B fixed to the clamp pipe 13 of the clamp member 12, as shown in FIGS.
B is connected to a clamp head 28B that presses against the upper surface of the frame of the screen printing plate S. In the figure, the clamp mechanism 25A is configured to fit and press only one of the left and right frames of the screen printing plate S to be inserted and held, and the other is only pressed by the clamp mechanism 25B. There is. In this way, for example, even when the frame of the screen printing plate S is distorted or the like, only one of the left and right frames of the screen printing plate S is reliably aligned, and the print pattern Can be matched to a predetermined position.

The positioning holes 5 formed in the frame of the screen printing plate S correspond to the print pattern positions that match the work W when the screen printing plate S itself is set on the printing table 3. The clamping mechanism 25
Of course, it corresponds to the position held by A. Further, since the lower end of the clamp pin 28A in the clamp mechanism 25A is in the shape of a cone, even if there is a slight displacement, the clamp pin 28A can be positioned in the positioning hole 5A.
When it fits into the, the position can be corrected.

As shown in FIG. 8, the positioning holes 5 formed in the frame of the screen printing plate S are used for positioning when creating a printing pattern at the time of plate making. The means 30 includes a jig plate P set on the screen printing plate S by interposing a pattern film F for forming a print pattern placed on the screen of the screen printing plate S, aligning the pattern film F, and setting the pattern film F on the screen printing plate S. With the frame of the screen printing plate S. In other words, the jig plate P is, for example, as shown in the drawing, one of the right and left frames on the side where the positioning holes 5 are formed in the screen printing plate S, and is orthogonal to the frame. It is made of a transparent acrylic resin plate that presents a substantially L-shaped outline when viewed from above, so as to be placed on one of the front and rear frames,
A positioning hole 32 corresponding to the positioning hole 5 is formed, and a cross-shaped positioning mark (register mark) for matching the pattern film F is displayed.

Next, an example of the use of the invented device will be described. In response to a screen printing plate S having a predetermined size selected in accordance with a printing pattern on a work W, the screen printing plate S is actuated by the operation of the slide means 15. If is large, the clamp member 12 is adjusted to be located on the left and right outer sides, and if small, the clamp member 12 is adjusted to be located on the center side. At this time, if the screen printing plate S is large, the stopper pin 23 of the stopper means 21 is immersed, and if the screen printing plate S is small, the stopper pin 23 is projected. Next, the screen printing plate S is inserted from the front while sliding on the clamp angle member 14 of the clamp member 12, and the stopper plate 22 or the stopper pin 2 is set in accordance with the size.
Stop position is determined by making contact with any one of the three. After the positioning, each of the clamp mechanisms 25A and 25B is operated, and the clamp mechanism 25A is fitted into the positioning hole 5 and pressed. In the clamp mechanism 25B, the frame of the screen printing plate S is pressed. The screen printing plate S is held and fixed on the clamp angle member 14 by pressing from above. Then, the work W carried into the alignment positioning device 7 is adjusted so as to correspond to the input position on the print table 3 so that the work W is positioned and set with respect to the screen printing plate S. Thereafter, printing is performed by the reciprocating movement of the squeegee unit 4 in connection with the continuous loading of the workpiece W aligned by the alignment positioning device 7, and the printing is appropriately discharged after the printing.

The automatic positioning system for the printing position at this time will be described. As shown in FIG. 9, the alignment mark displayed on the upper surface of the dummy substrate W1 at the alignment positioning position in the alignment positioning device 7 is, for example, a CCD camera. 8, the dummy substrate W1 is moved to the transfer table 6
To the printing apparatus 1. After the conveyance, the printing is performed by the printing apparatus 1, for example, a donut mark corresponding to the alignment mark is printed and displayed, and the conveyance table 6 is again returned to the alignment and positioning device 7 side (see FIG. 9A). 8 to read a donut mark, perform automatic binarization and automatic calibration processing corresponding to the image processing of the alignment mark on the upper surface of the work W by the CCD camera 8 so as to correspond to the appropriate position, and correspond to the print pattern. The reference position is registered in the matching positioning device 7, and the dummy substrate W1 is removed. Next, the actual substrates W2 are sequentially loaded, and the XY image is taken along with the image processing by the CCD camera 8 of the alignment positioning device 7.
By correcting the movement in the direction, the work W is made to correspond to the print pattern position, and is conveyed so as to be automatically loaded into the printing apparatus 1 by the conveyance table 6 (see FIG. 9B).

In order to form a print pattern on the screen printing plate S, as shown in FIG.
0, and on the screen printing plate S,
The positioning hole 32 is aligned with the position of the positioning hole 5 of this S, and the jig plate P is placed by being fitted with the positioning pin 31, and the jig plate P is placed between the screen of the screen printing plate S and the jig plate P. The pattern film F is interposed by matching the alignment marks of both the component plate P and the pattern film F, and the pattern film F is appropriately affixed to the upper surface of the screen with a tape or the like. Thereafter, a printing process is performed to create a predetermined print pattern on the screen. Therefore, the print pattern thus created is accurately positioned at a predetermined position on the screen printing plate S, so that the print pattern is accurately aligned and fixed by the printing apparatus 1 so that the pattern printing at the time of printing is performed. Accuracy is guaranteed.

[0030]

As described above, this invention is achieved by fitting and pressing the screen printing plate S on the printing table 3 by the clamp pin 28A of the clamp mechanism 25A which is at a fixed position with respect to the printing table 3. Prior to the continuous printing operation processing, since the screen printing plate S on which the printing pattern is created is held,
The work W between the print table 3 and the alignment positioning device 7
When the screen printing plate S is reciprocated several times, the position corresponding to the printing pattern can be easily performed because the position of the screen printing plate S is fixed, and when the screen printing plate S is exchanged or set up, it is quickly performed. be able to. Also, when a print pattern is created on the screen printing plate S, the positioning of the pattern film F using the jig plate P using the positioning holes 5 for fitting and holding the screen printing plate S at the time of print setting is performed. It can be formed corresponding to the printing position, facilitates positioning in a series of operations from the time of plate making to the time of printing, and enables automatic setting.

In addition, the position of the pattern film F on the screen printing plate S in the first stage from the time of plate making to the time of printing corresponds to the size of the screen printing plate S in the printing apparatus 1 in the second stage. Switching setting, automatic positioning at the time of setting the screen printing plate S to the printing apparatus 1 at the third stage, automatic positioning program of the printing pattern at the fourth stage (one-cycle printing of temporary printing, automatic reference position for image processing use) The entire series of processes for final positioning by recognition (recognition) can be performed quickly, and the accuracy can be on the order of microns.

That is, the screen printing plate S set on the printing table 3 is changed to the screen printing plate S
Pin 28A that is fitted and pressed against the frame body
This is because the screen printing plate S can be reliably positioned and fixed at a predetermined position on the printing table 3.

The clamp member 12 is disposed symmetrically to the left and right. The clamp pipe 13 is slid by the slide means 15 and the clamp angle member 1 having a substantially L-shaped cross section to which the clamp pipe 13 is fixed.
4, together with the stopper means 21 for restricting and stopping at the back of a different position when the slide is loaded, the screen printing plate S of any width and size is different.
Can be held and set. That is, in the stopper means 21, the large screen printing plate S is provided by the stopper plate 22 provided at the back of the clamp angle member 14 while the stopper pin 23 is in the retracted state, and By contacting the small screen printing plates S with the stopper pins 23 respectively, the small screen printing plates S can be positioned and fixedly held at predetermined positions with respect to the clamp angle member 14.

The clamp mechanism 25A that fits and presses the screen printing plate S loaded and slidable is expanded and contracted by the cylinder operation of the clamp cylinder 26A fixed to the clamp member 12, so that the frame member of the screen printing plate S is expanded and contracted. The screen printing plate S temporarily fixed by the clamp member 12 and the stopper means 21 is connected by being connected in a state of being engaged with the weight-shaped positioning clamp pin 28A fitted into the drilled positioning hole 5. Even if there is a slight difference in the temporary fixing position, it can be accurately guided and held at a predetermined position even if the temporary fixing position has a slight difference.

Since the screen printing plate S is provided with the positioning holes 5, when a printing pattern is formed by using the pattern film F formed on the screen printing plate S, a process for aligning the pattern film F is performed. The positioning can be easily performed on the screen printing plate S by the component plate P and the positioning holes 5, and the printing position can be accurately corresponded to the printing position.

[Brief description of the drawings]

FIG. 1 is a partially cut-away plan view of an embodiment of the present invention with a part omitted.

FIG. 2 is a front view of the same.

FIG. 3 is a front view of a rear slide unit of the clamp member.

FIG. 4 is a side sectional view of a structure of a stopper means of a stopper means, which is protruded and retracted.

FIG. 5 is a front sectional view of a clamp mechanism for fitting and pressing a screen printing plate.

FIG. 6 is a front sectional view of a clamp mechanism for pressing a screen printing plate.

FIG. 7 is a perspective view of a main part of a clamp mechanism for fitting and pressing a screen printing plate.

FIG. 8 shows a jig plate for creating a print pattern;
It is a perspective view showing an example of arrangement | positioning of a film and a screen printing plate.

FIG. 9 is a schematic diagram illustrating a work procedure in the automatic positioning system.

[Explanation of symbols]

F Pattern film P Jig plate S Screen printing plate W Work W1 Dummy substrate W2 Actual substrate 1 Printing device 2 Support frame 3 Printing table 4 Squeegee unit 5 Positioning hole 6 Transport table 7 Alignment positioning device 8 CCD camera 10 Positioning device 11 Base Member 12 Clamp Member 13 Clamp Pipe 14 Clamp Angle Material 15 Slide Means 16 Slide Cylinder 17 Joint Member 18 Guide Member 21 Stopper Means 22 Stopper Plate 23 Stopper Pin 24 Retractable Cylinder 25A Clamp Mechanism 26A Clamp Cylinder 27A Clamp Arm 28A Clamp Pin 25B Clamp Mechanism 26B Clamp cylinder 27B Clamp arm 28B Clamp head 30 Positioning means 31 Positioning pin 32 alignment holes

Continuation of the front page (56) References JP-A-58-9396 (JP, A) JP-A-4-193535 (JP, A) JP-A-62-1542 (JP, A) Jpn. , U) Fully open sho 59-94837 (JP, U) Fully open sho 60-26843 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B41F 15/34-15/36 B41F 15/08 303

Claims (3)

(57) [Scope of request for utility model registration] 1. A printing pattern formed on a screen printing plate in a fully automatic screen printing machine that performs printing on a work automatically inserted below the screen printing plate via a screen printing plate held and set on a printing table. The positioning device of the front and rear base members mounted between the left and right support frames before and after the screen printing machine, and mounted between the base members,
A left and right clamp member that is slidably adjusted in the left and right direction according to the left and right width of the screen printing plate, and a clamp member that regulates and stops one of the front and rear frame portions corresponding to the front and rear width of the screen printing plate. And a clamp mechanism that fits and presses the positioned screen printing plate, and the stopper unit includes a rear frame that is a back portion of the screen printing plate that is slid and mounted. A stopper plate provided on the back of the clamp angle material so that the frame can be abutted, and a stopper pin provided on the clamp angle material so that the frame body on the rear side of the screen printing plate can also come and go so as to be abutted. A printing pattern positioning apparatus in an automatic positioning system of a fully automatic screen printing machine. 2. The clamp member comprises a clamp pipe which is slid in the left-right direction by a slide means, and a clamp angle member having a substantially L-shaped cross section fixed to a center side surface of the print table in the clamp pipe. The sliding means is connected to a slide cylinder fixed to the base member and a clamp pipe,
2. A printing pattern positioning apparatus in an automatic positioning system for a fully automatic screen printing machine according to claim 1, further comprising: a joint member connected to a cylinder rod of a slide cylinder; and a guide member for guiding a clamp pipe in a left-right direction. . 3. A clamp mechanism, wherein a lower end of a weight body is fitted on a clamp arm connected to a cylinder rod of a clamp cylinder fixed to a clamp pipe of a clamp member so as to fit into a positioning hole formed in a frame body of a screen printing plate. 2. A positioning clamp pin having a shape of a link.
Or an apparatus for aligning print patterns in an automatic positioning system of a fully automatic screen printing machine according to 2.