JPH0624841B2 - Automatic printing machine for liquid photoresist application - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention enables continuous and automatic application of a liquid photoresist in a printed wiring board manufacturing process by a screen printing method. The present invention relates to an automatic printer for applying a liquid photoresist.

(Prior Art) Conventionally, application of a liquid photoresist to a printed wiring board is performed by a screen printing method using a general screen printer. The screen printing machine is generally equipped with a printing table for applying and printing the work and setting the work, and moving the work table back and forth between the picking position and setting the work on the printing table. It is designed to be performed in a vacuum system (for example, Japanese Patent Publication No. 51-32122, Japanese Utility Model Publication No. 52-15).
282, JP-A-55-133592).

(Problems to be Solved by the Invention) However, in the case of using the screen printing machine, there are various problems in setting a work, which is a printed wiring board, at a printing position, discharging the work, and a fixed clamp at the printing position.

That is, in setting and discharging the work at the printing position, the work is placed on the printing table configured to be movable back and forth with respect to the printing position. Yes, it is very troublesome. Also, if you take out and set it with a vacuum type that uses air pressure, the work will have a large number of through holes, so the air efficiency will be poor, and you will be uncertain about taking out and setting. Becomes In addition, since a large number of vacuum air holes are formed in the printing table, the liquid photoresist that has passed through the through holes is deposited and deposited on the printing table when the liquid photoresist is applied. Therefore, when the coating printing is repeated, unevenness is generated on the upper surface of the printing table, which makes the work easier to set, and furthermore, the liquid photoresist is sucked into the vacuum mechanism through the air holes, which may cause a failure. Become.

Therefore, application printing using a screen printing machine has various inconveniences, and most of the work is performed manually.

Therefore, the present invention was created in view of the above-mentioned various existing circumstances, and does not depend on the vacuum system.
Workpieces are continuously supplied to the printing position on the printing table and discharged from the printing position by a conveyor device.
An object of the present invention is to provide an automatic printing machine for liquid photoresist coating, which can continuously and automatically perform coating and printing by securely fixing and supporting a work at a printing position by pressing clamps.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above-mentioned object, in the present invention, a carry-in section for carrying out a regulation correction of a work to which a liquid photoresist is applied to a normal position and carrying it in. After transporting the workpiece again after printing and discharging it, the transport device is stopped, and the workpiece that has been loaded is stopped on the printing table, then clamped at the printing position, and the liquid photoresist is squeegeeed with a squeegee unit. In a device having a printing device for releasing the clamp fixation after coating printing, the printing device has a stop mechanism arranged at the front part in the transport direction so as to stop the work at the printing position on the printing table, After the stop, the transport stop mechanism that stops the transport operation by the transport device, the print position setting mechanism that presses the stopped work from the rear in the transport direction and positions it at the print position, and the printing A clamping mechanism that clamps the entire left and right side edges of the work after setting to the printing table is incorporated into the printing table.After printing by the squeegee unit, each of these mechanisms is deactivated and the transport device is reactivated. The stop mechanism has a plurality of stopper pins slidable in the stopper holes formed in the printing table in the front and rear in the transport direction, and any one of these stopper pins is arranged. Each time a work is conveyed, the work is alternately moved up and down on the printing table. The printing position setting mechanism delivers the set plate that is delivered to the back side of the printing table and moves up and down on the printing table by the operation of the set cylinder. The stop mechanism pushes the work motor from the rear in the conveying direction of the work by driving the set motor. So that the slides can be adjusted symmetrically to the left and right positions in the direction, they are slid together with the adjust base plates on the left and right below the printing table, and are slid together with the adjust base plates, and are connected to each other by the joint pipes arranged along the transport direction. The slide base plate and the adjust base plate so that the slide base plate slides substantially perpendicular to the carrying direction with respect to the adjust base plate.
The upper joint plate is arranged stepwise via the slide cylinder delivered between the slide base plates that elastically expands and contracts, and the lower bridge plate that slides up and down on the lower joint plates connected between the slide base plates. Further, on the upper joint plate, a clamp plate positioned on the printing table via an upper bridge plate that slides through the printing table and an upper joint plate by vertical guide means attached to the slide base plate. And a clamp cylinder for vertically moving the upper joint plate so as to vertically move the clamp plate via the.

(Operation) In the automatic printer for liquid photoresist coating according to the present invention, when a work is loaded into the carry-in portion of the transport device, the work is straightened and positioned at a predetermined position in the transport direction, and in that state, the transport device performs printing of the printing device. Transport it onto the printing table.

When the work is conveyed onto the printing table, the stopper pin of the stop mechanism projects onto the printing table to stop the work at the printing position. At this time, the stopper pins at the front and rear in the transport direction alternately project every time one workpiece is transported and are stopped at a position slightly displaced forward and backward. After the work is stopped, the work is placed on the printing table,
Therefore, the print position setting mechanism pushes the work forward in the transport direction to position the work. In connection with this positioning
The transport stop mechanism stops the transport operation of the transport device, and the setting of the work at the printing position is completed.

After the positioning is completed, the clamp mechanism operates, and its slide cylinder causes the slide base plate, lower joint plate, and
The lower bridge plate, the upper joint plate, the upper bridge plate, and the clamp plate are slid so as to be substantially orthogonal to the transport direction, and are elastically approached to the left and right edges of the work. When brought close to each other, the clamp cylinder lowers the clamp plate on the printing table through the vertical guiding means, and clamps the entire left and right side edges of the work after being set at the printing position on the printing table.

Then, in the squeegee unit, application printing is started by this, and if necessary, this is repeated until the preset number of times of application is reached, to prepare for the next operation.

After finishing the coating printing, release the clamped condition of the work,
The work is discharged to the unloading section by the transport device that operates again.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

<Outline of the entire automatic printing machine> The automatic printing machine according to the present invention, when a work W, which is a printed circuit board to which a liquid photoresist is applied, is put in, a carrying-in section that corrects and loads the work into a regular position, and after printing, A transporting device 20 having a carry-out part for transporting again and discharging, and a printing device 50 for stopping the loaded work W and then clamping and fixing the work W at a printing position to apply liquid photoresist by a screen printing method. And.

The printing device 50 is configured by using a general screen printing machine. For example, as shown in FIG. 1 and FIG.
A main body frame 1 whose level is adjusted with respect to the installation surface, a print table 2 which is provided at a printing position above the main body frame 1 and on which a work W to be carried in is stopped, and a work W on the print table 2. On the other hand, a squeegee that traces the ink on the plate frame S that is set on the squeegee, and a squeegee unit 3 that causes the doctors that level the ink after printing to run upside down with respect to each other are run.

The squeegee travels along the front-back direction of the printing device 50, and the work W is conveyed along the left-right direction of the printing device 50. The left side and the right side of the transport device 20 arranged along the left and right at 50 are taken as the carry-in section and the carry-out section, respectively.

<Conveying Device> The conveying device 20 includes a carrying-in frame 21 projecting leftward on the front-rear supporting frame 1, a carrying-out frame 22 projecting rightward on the supporting frame 1, and these frames 21, The conveyor belt 23, which is stretched over the printing table 2 between the rollers 22, is intermittently circulated.

The conveyor belt 23 has a carry-in belt pulley 2 axially supported by the end of the carry-in section frame 21 and the end of the carry-out section frame 22.
4. It is wound around the carry-out belt pulley 25, and as shown in the figure, is arranged in pairs on the left and right in the carrying direction. The driving is performed by, for example, the carry motor 26 fixed to the carry-out section frame 22, and the drive of the carry motor 26 is transmitted to the carry-out belt pulley 25 by the belt drive method, and the carry belts 23 on the left and right are simultaneously driven. It
Reference numeral 27 in the drawing denotes a tension pulley arranged in each of the carry-in section frame 21 and the carry-out section frame 22.

<Bearing-in Portion of Conveying Device> Then, the carrying-in portion has a pair of left and right carrying-in plates 32 having a substantially hat-shaped cross section fixedly fixed to the base plate 31 fixed to the carrying-in frame 21 in a convex shape. The conveyor belt pulley 24 is positioned outside the end portion of the plate 32 in the length direction, and the conveyor belt 23 that is driven to loop is slid on the carry-in plate 32 and placed on the conveyor belt 23. The formed work W is conveyed toward the printing table 2.

At this time, the work W loaded in the carry-in section is once placed on the lift plate 28 located above the conveyor belt 23, and is corrected to a predetermined position by the normal position correction mechanism 35 described later in the mounted state. It After the correction, when the lift plate 28 is lowered by the operation of the lift cylinder 29 and the work W is set on the transport belt 23, the transport is started, and the work W is sequentially transported on the printing table 2 one by one. Shall be allowed.

<Regular Position Correcting Mechanism at Carry-In Section> Then, the carry-in section accurately guides the loaded work W to the printing position on the printing table 2 to be applied to the work W without lateral displacement. Orthogonal correction mechanism 3
5 is provided.

The correct position correcting mechanism 35 is provided with left and right set plates 36 that shift the width of the work W loaded on the carry-in plate 32 from the left and right in the transport direction so as to be slidable in the direction orthogonal to the transport direction.

That is, as shown in FIGS. 3 to 5, the work set base plate 37 is fixed to the carry-in part frame 21 by being positioned below the base plate 31. On the work set base plate 37, the set pinion 38 is axially supported while being positioned on the center line along the carrying direction, while the left and right drive racks 39 slidably supported in the direction orthogonal to the carrying direction are set on the work set. The front and rear of the base plate 37 are meshed with each other, and the tip of the cylinder rod of the set cylinder 40 fixedly arranged on the work set base plate 37 is connected to one of the drive racks 39. The slide shafts 4 mounted on the front and rear sides of the work set base plate 37 are provided at the ends of the drive rack 39 located at the left and right ends in the transport direction.
A slide plate 42 is fixed along the conveying direction so that the slide plate 42 can be guided and slid in the left-right direction by 1. On the slide plate 42, the set plate 3 is provided on top.
A set base plate 43 to which 6 is fixed is vertically fixed, and sensors 44 for detecting the presence or absence of the work W are arranged at the upper and lower edges of the set plate 36.

The tip of the cylinder rod of the set cylinder 40 is
It is connected to the tip of the drive rack 39 via a uniball. Two set base plates 43 are provided before and after the slide plate 42, but the number thereof is not limited. The sensor 44 on the left and right is the work W
Is detected simultaneously, the operation of the set cylinder 40 is stopped. Furthermore, set plate 3
The end portion of the throwing edge at 6 is gradually widened as the edge goes to the edge so that the workpiece W can be smoothly guided.

In the figure, reference numeral 45 designates slide units provided at both ends of the slide plate 42 so as to be slidably fitted to the slide shaft 41. Reference numeral 46 designates a set base plate 43 which is opened on the base plate 31 to let it out. It is a certain slide long hole.

Therefore, when the set cylinder 40 is actuated after the work W is loaded and one of the drive racks 39 is slid, the other drive rack 39 is also slid through the set pinion 38, and the slide is performed. , At the same time, the directions are opposite to each other. Then, the drive rack 39 slides the set plate 36 to the left and right through the slide plate 42 and the set base plate 43, and when they approach each other, the center of the work W at the loading portion is moved to the side. Therefore, when the sensor 44 of the set plate 36 detects both edges of the work W at the same time, the operation of the set cylinder 40 is stopped. Next, the conveyor belt 23
After the conveyance in (1), the set plates 36 are separated from each other with the return operation of the set cylinder 40 to prepare for the next operation.

According to such a normal position correcting mechanism 35, no matter how the input work W is displaced in the left-right direction in the transport direction, it is possible to restrict the correction to an appropriate normal position, and the work W has a wide width. Even if it is narrow, it is possible to perform width adjustment in the same manner without any adjustment operation. Especially, compared to the conventional one that requires setting the reference line for width adjustment, the work W
It is not necessary to adjust the width adjustment range on the left and right for each different width, and it is extremely easy to handle.

<Printing Device> The work W that has been corrected to the predetermined position in the transfer direction by the above-described correct position correcting mechanism 35 in the carry-in section is transferred to the printing device 50.

This printing device 50 stops the work W carried in by the carrying device 20 at a predetermined printing position, clamps the work W, applies and prints the liquid photoresist by the squeegee unit 3 an appropriate number of times, and clamps after printing. The work W is discharged to the carry-out section by releasing the fixing and reactivating the transport device 20.

Therefore, the stop mechanism 55 that stops the work W at the printing position on the printing table 2, the transport stop mechanism 65 that stops the transport operation of the transport device 20 after the stop, and the stopped work W from the rear in the transport direction. A printing position setting mechanism 75 that presses and positions the printing position and a clamping mechanism 95 that clamps the work W after the printing position setting on the table 2 are incorporated into the printing table 2, and after printing by the squeegee unit 3. Then, each of these mechanisms 5
5, 65, 75, 95 release the operation, the transfer device 20
Shall be reactivated.

<Printing table> As shown in the drawing, the printing table 2 is formed by disposing the center table 51 at the center and the side tables 52 on the left and right, respectively, in the transport direction. Below, the above-mentioned respective mechanisms 55, 65, 7
5,95 are incorporated. These tables 51, 5
Reference numeral 2 denotes a support bolt 4 for adjusting and setting the angle frame installed on the main body frame 1 at a predetermined height position.
It is fixedly supported through (see FIGS. 7 to 11).

Then, the conveyor belt 23 is made to travel in the gap between the center table 51 and the side table 52, and when the conveyor belt 23 is in the raised position and is traveling, the work W is conveyed and lowered. When the table W is in the position and the upper surface thereof coincides with the upper surfaces of the tables 51 and 52 and the traveling is stopped, the conveyance of the work W is stopped.

Further, as shown in FIG. 6, the left and right side tables 52
As will be described later, each of them is formed into a proper number, for example, divided into four along the transport direction, because of sliding of an upper bridge plate 116, which will be described later, which is a component for advancing and retracting the clamp plate 96 in the clamp mechanism 95. I am doing it. Further, in order not to obstruct the conveyance of the work W by the gap between the divided side table 52 members, the conveyance roller 53 for overcoming the gap is projected and retracted on the side table 52 by the cylinder operation before the gap in the conveyance direction. It is provided freely. During the printing operation, the transport roller 53 sinks below the side table 52 to directly place and support the work W on the side table 52 (see FIG. 7).

<Stopping Mechanism of Printing Apparatus> As shown in FIGS. 6 and 8, the stopping mechanism 55 is located at the front edge in the transport direction of the work W corresponding to the position where the work W is stopped on the printing table 2. It is provided on the center table 51.

That is, the stopper hole 56 is opened in the front portion (rightward in FIG. 6) of the center table 51 in the carrying direction, and the stopper pin block 57 fixed to the back surface of the stopper hole 56.
A stopper cylinder 58 is supported and fixed to the stopper cylinder 58, and a stopper pin 59 which is slidable in the stopper hole 56 and protrudes and retracts on the center table 51 is connected to the tip of the cylinder rod of the stopper cylinder 58.

The stopper pins 59 shown in the figure are arranged on the left and right of the center table 51 so as to form a pair on the left and right in the transport direction, so that there is no blurring in the left and right directions when stopped.

The stop mechanism 55 is provided in a plurality, for example, two sets before and after in the transport direction, and as shown in the figure, the front one in the transport direction is the outer side in the transport direction and the rear one in the transport direction. Are arranged inside so that they are alternately actuated in and out. Then, the stop positions of the conveyed works W are alternately different depending on the works W, so that a very large number of fine holes (through holes) are formed.
The liquid photoresist on the work W in which the
It does not deposit and deposit on the printing table 2 at the same position after passing through the through hole, which enables continuous use for a long time.

In the figure, 61 is the work W stopped by the stop mechanism 55.
Is a fiber-structured work detection sensor that detects the presence or absence of the work W on the printing table 2. When the presence of the work W is detected, the conveyance operation of the conveyance device 20 is stopped, and the conveyance stop mechanism 65 is operated. (See FIG. 7).

<Conveyance Stop Mechanism of Printing Apparatus> Further, in the conveyance stop mechanism 65, in the print table 2 portion, the conveyor belt 23 running in the raised position is set to the lowered position, and the upper surfaces of the conveyor belt 23 are the center table 51 and the side table 52. When the position is matched, the traveling operation is stopped.

That is, outside the front and rear edges of the center table 51, the lift plates 66 elongated in the left and right in the transport direction are arranged, and between the left and right edges of the lift plate, the transport belt 2 is provided.
3, the belt under plate 67 located in the partial position of the printing table 2, which is adapted to the running position thereof, that is, in the gap between the center table 51 and the side table 52, is connected. Then, the tip of the cylinder rod of the lift cylinder 68 fixedly arranged on the front and rear surfaces of the center table 51 in the transport direction is connected to the cylinder stay 69 fixed to the lift plate 66, and the belt under plate 67 is moved up and down by the operation of the lift cylinder 68. It is made to let.

As shown in FIG. 8, the belt under plate 6
The front and rear edges in the transport direction at 7 are curved so that the sliding contact travel of the transport belt 23 at the elevated position is facilitated.

Reference numeral 71 in the figure slides on the slide shaft 72 so that the slide shafts 72 provided on the back surfaces of the center table 51 on the front, rear, left and right sides are inserted therethrough to smoothly move the lift plate 66 and the belt under plate 67 up and down. It is a slide unit that fits freely.

In the transport stop mechanism 65, the transported work W is stopped at the printing position, and when the presence thereof is detected, the lift cylinder 68 is activated, and the work W is lifted through the lift plate 66 and the belt under plate 67 so as to be transported to that point. The transport belt 23 in the position is lowered to be positioned in the space between the center table 51 and the side table 52, and the traveling of the transport belt 23 is stopped. After the application in the squeegee unit 3, the lift cylinder 68 is actuated to raise the transport belt 23 again, and the transport belt 23 in the transport device 20 that is actuated again transports the work W.

<Print Position Setting Mechanism of Printing Device> A print position setting mechanism 75 that positions the work W at a predetermined coating print position when the conveyance stop mechanism 65 stops conveyance.
Is mounted on the back surface of the printing table 2, and drives the set motor 79 to drive the set plate 76 that appears and disappears on the printing table 2 by the operation of the set cylinder 82.
The stop mechanism 55 presses the crocodile from the rear in the conveying direction.

That is, as shown in FIG. 6, FIG. 8, FIG. 10, and FIG. 11, a work set slide plate that slides back and forth by a slide shaft 77 provided on the back surface of the center table 51 along the conveyance direction of the work W. 78 is provided.
The work set slide plate 78 is connected to a chain 81 which is circulated and driven by the drive of a set motor 79 which is fixed and mounted on the back surface of the center table 51 and which is driven forward and backward. The work set slide plate 78 is driven by the drive of the set motor 79. It is made to run back and forth along the transport direction of W. The work set slide plate 78 swingably supports the set plate 76 which undulates in the conveyance direction of the work W, and the tip of the cylinder rod of the set cylinder 82 fixed on the work set slide plate 78 is attached to the work set slide plate 78. The set plate 76 is pivotally supported via a knuckle joint. Therefore, when the set plate 76, which is undulated by the operation of the set cylinder 82, appears and disappears on the center table 51 and advances in the carrying direction in the upright state, the work W on the center table 51 is pressed from the rear side thereof, and the work W Positioning is performed by pressing the front end against the stopper pin 59 of the stop mechanism 55.

In addition, the set table 76 includes a center table 51.
A sensor that is not turned on when the work W exists above is attached, and when the work W is pressed and positioning is completed,
By driving the set motor 79 and operating the set cylinder 82, the set plate 76 is returned to the original position and is on standby.

Reference numeral 83 in the drawing denotes a slide unit provided on both sides of the work set slide plate 78 so as to be slidably fitted to the slide shaft 77, and one of the slide units 83 has a chain 81 via a tension bolt. Are connected. 84 is the set plate 7
6 is a pressing elongated hole opened in the center table 51 for allowing the 6 to stand up and out on the center table 51.

Further, a limit dog 86 is attached to the work set slide plate 78, and the work set slide plate 7
By contacting the front and rear limit switches 87 arranged at the travel limit positions at both front and rear ends of travel of the vehicle 8 itself (see FIG. 6,
(See FIG. 10), the drive of the set motor 79 is stopped by the operation of the limit switch 87, and the travel limit of the work set slide plate 78 itself is regulated and set.

In the printing position setting mechanism 75, when the work W is stopped on the center table 51 by the operation of the transport stop mechanism 65 described above, the set cylinder 82 is actuated to set the set plate 76 to the upright state. The work set slide plate 7 is driven by the set motor 79.
Run 8. Then, the work W on the center table 51 is pressed and positioned by the stop mechanism 55 which is the front in the transport direction. Therefore, the presence of the work W is detected by turning off the sensor of the set plate 76, and the set motor 79 is driven and the set cylinder 82 is detected.
By the operation of, the set plate 76 is returned to the original position and is on standby.

<Clamping Mechanism of Printing Apparatus> After the stop setting at the printing position of the work W along the carrying direction on the center table 51, the work W is clamped and fixed on the printing table 2 by the clamp mechanism 95 from both sides in the carrying direction. It is supposed to do.

This clamp mechanism 95, as shown in FIGS. 12 to 16, has a clamp position adjusting mechanism 125, which will be described later, which allows adjustment of the initial operating position depending on the width of the work W.
Together with the printing table 2. And
The clamp plate 96 is slid to both side edges of the work W from the left and right outside in the transport direction while the center is in the ascending position, and when reaching the both side edge positions of the work W, the clamp plate 96 is lowered to both sides of the work W. The edges are pressed onto the printing table 2.

The clamp mechanism 95 itself is provided with an adjusting base plate 101 which is elongated along the carrying direction and arranged on the left and right sides of the printing table 2 so as to be slid and adjusted in a direction orthogonal to the carrying direction of the work W, and the adjusting base plate 101. And a slide base plate 103 which slides together and is connected to each other by a joint pipe 102 arranged along the front and rear in the transport direction. The adjust base plate 101 and the slide base plate 10 are provided.
3, the work cylinder W is sandwiched between the left and right edges in the transport direction by the slide cylinder 104 arranged between the clamp cylinder 10 and the clamp pipe 10.
5, the clamp plate 96 is moved up and down to press both side edges of the work W onto the printing table 2.

Then, the slide cylinder 104 is shown in FIG.
As shown in FIG. 6, the slide base plate 103 is fixed to the inside by a cylinder stay, and a slide adjust bolt 106 is integrally provided on the cylinder rod.
A coil-shaped spring 108 is compressed between a cup-shaped spring guide 107 that is screwed into the slide adjustment bolt 106 itself, and a spring plate 109 fixed on the adjustment base plate 101 is connected to the head of the slide adjustment bolt 106. Place them in a sandwich. Reference numeral 111 is a lock nut that prevents the spring guide 107 from loosening.

Further, a limit switch 112 is provided on the adjusting base plate 101, and when its actuator comes into contact with the head of the slide adjusting bolt 106 protruding to the outside of the spring plate 109, the slide cylinder 1
04 The operation is stopped.

Therefore, when the slide cylinder 104 extends the cylinder rod, the center of the printing table 2 is slid to the center of the printing table 2 via the cylinder stay, starting from the adjustment base plate 101 that does not move. Then, the front edge of the clamp plate 96 comes into contact with both side edges of the work W to clamp the work W. When the clamp W is sufficiently clamped, the spring 108 bends, and the head portion of the slide adjust bolt 106 moves to the spring plate. 109, the limit switch 112 is actuated to project outward, and the operation of the slide cylinder 104 is stopped to clamp and support the work W.

In addition, as described above, the adjust base plate 101 and the slide base plate 103 are connected to each other through the slide cylinder 104, the slide adjust bolt 106, the spring 108, and the spring plate 109, so that the adjust base plate 10
The slide base plate 103 itself follows the slide by sliding at 1.

Further, since the spring 108 bends after the both side edges of the work W are clamped, the work W is prevented from being damaged,
Fully protect.

On the other hand, as shown in FIGS. 14 and 16, the clamp cylinder 105 is fixed to the back surface of an upper joint plate 115, which will be described later, which is arranged to fix and support the clamp plate 96, and the tip of the cylinder rod is fixed to the floating stay. It is fixed to the joint pipe 102 through.

Therefore, when the clamp cylinder 105 shrinks its cylinder rod, the joint pipe 10 that does not move.
Starting from 2, the upper joint plate 115 is pulled down through the floating stay. Then, the clamp plate 96 comes into contact with both side edges of the work W in a descending manner and presses the work W onto the printing table 2.

Thus, the clamp plate 96 has the twelfth to fourteenth parts.
As shown in the figure, it is supported and formed. That is, an appropriate number of upper bridge plates 116 are erected on the upper joint plate 115, and the upper bridge plates 116 are
The clamp plate 96 is erected and fixed on the upper side, and the upper bridge plate 116 itself is provided in the gap between the divided members forming the side table 52 in the printing table 2 as described above. The clamp plate 96 is connected to the upper bridge plate 116, which is arranged in a penetrating state and is exposed on the side table 52. The front edge of the clamp plate 96 itself is an inclined surface whose upper surface gradually becomes thinner as it goes forward to ensure smooth printing operation in the squeegee unit 3 (see FIG. 12).

The guide means is arranged in the vertical direction so that the clamp plate 96 can be smoothly moved up and down. As shown in FIG. 13 and FIG. 14, the guiding means is such that the lower parts of the slide base plate 103 arranged at the front and the rear in the conveying direction of the work W are located below the upper joint plate 115 and are substantially parallel to the lower part. And the lower joint plate 118 connected to the upper joint plate 115 by the lower bridge plate 117. Further, upper and lower parts of a slide shaft 121 slidably inserted in a slide unit 119 provided on the back surface of the slide base plate 103 are fixed to an upper joint plate 115 and a lower joint plate 118, respectively.

Therefore, when the clamp cylinder 105 is actuated, the cylinder rod extends and contracts, and when the clamp plate 96 is moved up and down via the upper joint plate 115, the slide shaft 121 rattles in the vertical direction by the slide unit 119. Without being guided, the vertical movement is extremely smooth.

<Clamp Position Adjusting Mechanism of Clamping Mechanism in Printing Apparatus> The clamp mechanism 95 as described above can be freely adjusted by the clamp position adjusting mechanism 125 so that the initial operating position is made different depending on the width of the work W. is there.

The clamp position adjusting mechanism 125 is configured to slide the adjust base plate 101 along the left and right in the conveyance direction of the work W by operating the clamp plate adjust handle 126 provided on the front surface of the main body frame 1 in the printing device 50. It was done.

That is, as shown in FIG. 12 to FIG.
Clamp unit adjusting screws 127, which are mutually opposite screws in the central portion, are rotatably supported by the rotation operation of the clamp plate adjusting handle 126, and the adjusting base plate is provided at both ends of the clamp unit adjusting screw 127. An adjustment block 128 fixed on 101 is screwed.

Therefore, the clamp plate adjustment handle 12
When the clamp unit adjusting screw 127 is rotated by the rotating operation of 6, the adjusting base plate 1 at both ends of the clamp unit adjusting screw 127 is rotated.
01 slides toward each other or away from each other. Therefore, by sliding the adjusting base plate 101, the slide cylinder 104,
Slide adjustment bolt 106, spring 108,
By interposing the spring plate 109, the slide base plate 103 itself and the clamp plate 96 can also slide and follow, and the initial operating position of the clamp can be adjusted.

Reference numeral 97 in the drawing denotes a slide shaft which is inserted through a slide unit 98 provided on the back surface of the slide base plate 103 for sliding, and is arranged below the printing table 2 so as to be orthogonal to the conveyance direction of the work W. .

At this time, the sliding of the adjusting base plate 101 and the slide base plate 103 in the direction orthogonal to the transport direction of the work W is such that the front and rear in the transport direction, that is, the left and right ends in the sliding direction slide in synchronization. There is. Therefore, as shown in FIG. 13 and FIG. 14, for example, the counter shaft 129 is rotatably inserted between the sliding base plates 103 on the left and right sides, and the counter pinion 129 is fixed to both ends of the counter shaft 129. The 131 is engaged with a counter rack 132 which is orthogonal to the carrying direction and which is appropriately installed on the support frame 1 and the like.

Therefore, when the clamp position adjusting mechanism 125 and the clamp mechanism 95 operate, the adjusting base plate 101
When the slide base plate 103 slides or slides via the slide base plate 103, the left and right slide base plates 103 along the sliding direction do not rattle at all, the accurate initial operation position is set, and the work W is properly clamped. The action can be exerted.

<Operation in Printing Device> When the transport device 20 loads the work W into the printing device 50 from the loading section, the stop mechanism 55 causes the work W to stop at the printing position, and the transport stop mechanism 65 causes the work W to move. After the conveyance is stopped, the print position setting mechanism 75 pushes the work W forward in the conveyance direction and positions it.

Next, the work W on the printing table 2 is clamped and fixed by the clamp mechanism 95, and when the fixing is completed, the liquid photoresist is applied and printed on the work W through the plate frame S by the operation of the squeegee unit 3.

After completion of the coating and printing, the clamping action by the clamp mechanism 95 and the transport stop action by the transport stop mechanism 65 are released respectively, and the transport action by the transport device 20 is started again, and the work W is discharged to the unloading section.

<Other Mechanisms of Printing Apparatus> Reference numeral 135 in the drawing is a lift adjust handle for moving the entire printing table 2 up and down, and the interval between the plate frame S and the printing table 2 is adjusted by rotating the lift adjusting handle.

Further, in the squeegee unit 3, the angle of the squeegee and the doctor can be changed with respect to the traveling direction.
As the squeegee runs, the distance between the plate frame S and the work W is automatically separated to prevent the liquid photoresist from adhering to the work W and double printing.

<Unloading Unit of Conveying Device> The work W coated and printed by the printing device 50 as described above is re-operated after the completion of the conveying device 20.
Is discharged to the carry-out section.

Then, as shown in FIGS. 17 to 19, the carry-out section has a carry-out plate 34 having a substantially hat-shaped cross section on the base plate 33 fixed to the carry-out section frame 22, as in the case of the carry-in section described above. Left and right are paired and fixed in a convex shape. Then, the conveyor belt 23 is driven to hang around.
Slides on the carry-out plate 34, and the printing device 50
The work W placed on the conveyor belt 23 discharged from the front is sent out in front of the unloading section (right side in FIG. 17).

<Operation of Printing Machine of the Present Invention> The printing machine according to the present invention is configured as described above,
For this operation, first, the clamp width corresponding to the width of the work W is set in advance by the adjusting operation of the clamp position adjusting mechanism 125.

Then, the work W placed in the carry-in section of the carrier device 20.
Is corrected and positioned to a predetermined position in the conveyance direction by the correct position correction mechanism 35 in the carry-in section, and in that state, the conveyance belt 23 at the raised position in the conveyance device 20 conveys it onto the printing table 2 of the printing device 50. To be done.

The work W conveyed onto the print table 2 is stopped at a predetermined print position by a stop mechanism 55 that operates by alternately changing the stop position. After the work W is stopped, the conveyance belt 2 of the conveyance device 20 is operated by the operation of the conveyance stop mechanism 65.
The work W is placed on the printing table 2 by setting 3 to the lowered position and stopping the traveling thereof. Then,
The print position setting mechanism 75 pushes the work W forward in the transport direction to position the work W, and the setting of the work W at the print position is completed.

After the positioning is completed, both side edges of the work W are clamped by the operation of the clamp mechanism 95, and the work W is pressed against the upper surface of the printing table 2 from above.

Next, the application printing by the squeegee unit 3 is started, and the liquid photoresist is applied by running the squeegee in the descending position so as to trace the plate frame S, and in the case of running in the reverse direction, it is made uniform by the doctor in the descending position. If necessary, this is repeated until the preset number of times of coating is reached to prepare for the next operation.

After completion of the coating printing, the clamped state of the work W is released, and the work W is discharged to the unloading section by the traveling of the transport belt 23 in the transport device 20 that operates again.

EFFECTS OF THE INVENTION The present invention is configured as described above, and therefore, the work W is continuously supplied to the printing position on the printing table 2 by the transport device 20 without using the conventional vacuum system. By discharging, and by securely fixing and supporting the work W by the pressing type clamp fixing at the printing position, continuous and automatic coating printing can be performed.

This is a carrying unit 20 having a carry-in unit for regulating and carrying in the work W to which the liquid photoresist is to be applied in a fixed position, a carry-out unit 20 for carrying the work again after printing, and discharging the work W, and the work W carried in. After stopping on the printing table 2,
This is because it is provided with a printing device 50 which is clamped and fixed at a printing position, and after the liquid photoresist is applied and printed by the squeegee unit 3, the clamp is released. Despite the presence of the work, the work W can be reliably carried in and out of the printing table 2, and the work efficiency can be greatly improved.

Particularly, in the printing apparatus 50, the stop mechanism 55 arranges a plurality of stopper pins 59 slidable in the stopper holes 56 formed in the printing table 2 in the front and rear in the transport direction, and these stopper pins 59 are provided. Since any one of the above is alternately operated to appear and disappear on the printing table 2 every time the work W is conveyed, even if the liquid photoresist is applied by printing onto the work W at the time of printing, it passes through the through hole of the work W. The liquid photoresist is less likely to be deposited at the same position on the printing table, which enables continuous use over a long period of time.

The clamp mechanism 95 includes an adjust base plate 101, a slide base plate 103, and a lower joint plate 11 arranged below the printing table 2.
8, the lower bridge plate 117, the upper joint plate 115, the upper bridge plate 116, the slide cylinder 104 that elastically expands and contracts, the clamp cylinder 105, and the like to move the clamp plate 96 on the printing table 2 in the conveyance direction of the work W. From the outside of the left and right sides, the center is slid up to both side edges of the work W in the ascending position, and then, when reaching the both side edge positions of the work W, it is lowered and the entire side edges of the work W are placed on the printing table 2. Since the work W is pressed down, the work W set at the printing position on the printing table 2 is firmly fixed without being attracted. Therefore, there is no escape of air for adsorption by the through holes in the case of the conventional vacuum method, and the through holes are not blocked by the liquid photoresist. Further, the elastic expansion and contraction operation of the slide cylinder 104 can prevent the work W from being damaged when the work on the printing table 2 is sandwiched from the left and right sides.

Not only that, since the clamp plate 96 that presses the work W on the printing table 2 is itself in the form of a board, even if the work W is held down, the squeegee unit 3 that slides does not travel greatly upwards. Since it does not interfere with the printing operation, the printing operation can be smoothly performed.

As described above, according to the present invention, the liquid photoresist coating in the manufacturing process of the printed wiring board can be continuously and automatically performed by the screen printing method, which is an excellent effect.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a plan view of the entire printing machine of the present invention, FIG. 2 is a front view of the same, and FIG. FIG. 4 is a side sectional view of the same, FIG. 5 is a front sectional view of the same, FIG. 6 is a partially cutaway plan view of the printing table in the printing apparatus, and FIG. , FIG. 8 is a front sectional view of the printing table, FIG. 9 is a side view of relevant parts, FIG. 10 is a sectional view taken along the line 10-10 in FIG. 6, and FIG. Sectional view, FIG. 12 is a partially cutaway side view of the printing table, FIG. 13 is a side view of the same, FIG. 14 is a plan view of relevant parts, and FIG. Fig. 16 is a side view,
FIG. 17 is a partially cutaway plan view of the carry-in section of the carrying device,
FIG. 18 is a front sectional view of the same, and FIG. 19 is a side sectional view of the same. W ... Work, S ... Plate frame, 1 ... Main body frame, 2 ... Printing table, 3 ... Squeegee unit, 4 ... Support bolt, 20 ... Conveying device, 21 ... Carry-in section frame, 22 ... …
Carry-out section frame, 23 ... conveyor belt, 24 ... carry-in belt pulley, 25 ... carry-out belt pulley, 26 ... conveyor motor, 27 ... tension pulley, 28 ... lift plate, 29 ... lift cylinder, 31 ... ... base plate, 32 ... carry-in plate, 33 ... base plate, 34 ... carry-out plate, 35 ... normal position correcting mechanism, 36 ... set plate, 3
7 ... Work set base plate, 38 ... Set pinion, 39 ... Drive rack, 40 ... Set cylinder, 41 ... Slide shaft, 42 ... Slide plate, 43 ... Set base plate, 44 ... Sensor, 45 ... ... Slide block, 46 ... Slide slot, 50 ... Printing device, 51 ... Center table, 52 ...
... Side table, 53 ... Conveying roller, 55 ... Stop mechanism, 56 ... Stopper hole, 57 ... Stopper pin block, 58 ... Stopper cylinder, 59 ...
… Stopper pin, 61 …… Workpiece detection sensor, 65 …… Conveyance stop mechanism, 66 …… Lift plate, 67
...... Belt under plate, 68 …… Lift cylinder, 69 …… Cylinder stay, 71 …… Slide unit, 72 …… Slide shaft, 75 …… Print position setting mechanism, 76 …… Set plate, 77 …… Slide shaft, 78 ... Work set slide plate, 79 ... Set motor, 81 ... Chain, 82 ... Set cylinder, 83 ... Slide unit, 84 ... Pressing long hole, 86 ... Clutch dog,
87 ... Limit switch, 95 ... Clamp mechanism, 96 ... Clamp plate, 9
7 ... Slide shaft, 98 ... Slide unit,
101 ... Adjust base plate, 102 ... Joint pipe, 103 ... Slide base plate, 1
04 …… Slide cylinder, 105 …… Clamp cylinder, 106 …… Slide adjustment bolt, 107 ……
Spring guide, 108 ... Spring, 109 ...
Spring plate, 111 ... Lock nut, 112
...... Limit switch, 115 …… Upper joint plate, 116 …… Upper bridge plate, 117 …… Lower bridge plate, 1
18 ... Lower joint plate, 119 ... Slide unit, 121 ... Slide shaft, 125 ... Clamp position adjusting mechanism, 126 ... Clamp plate adjusting handle, 127 ... Clamp unit adjusting screw, 128 ... Adjust block, 129 …… Counter shaft, 131 …… Counter pinion, 1
32 ... Counter rack, 135 ... Lift adjust handle.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masayuki Tanaka 1486-1 Asahi Nakagizu, Yawata-cho, Gujo-gun, Gifu Prefecture Tokai Seiki Co., Ltd. Address 1 Tokai Seiki Co., Ltd. (56) Reference JP-A-55-133592 (JP, A) Actually open 61-197540 (JP, U) Actually open 61-156935 (JP, U) JP-B 51- 32122 (JP, B2) Actual public Sho 52-15282 (JP, Y2)

Claims (6)

[Claims] 1. A carrying device equipped with a carry-in unit for correcting and carrying in a work to which a liquid photoresist is applied in a regular position, a carry-out unit for carrying again after printing, and carrying out the work, and the carried-in work. Automatic printing for liquid photoresist application, which has a printing device that stops the printing on the printing table, clamps it at the printing position, applies liquid photoresist with a squeegee unit, and then releases the clamping after printing. In the machine, the printing device has a stop mechanism arranged at the front part in the transport direction so as to stop the work at the printing position on the printing table, a transport stop mechanism for stopping the transport operation by the transport device after the stop, and a stop mechanism. A printing position setting mechanism that presses the formed work from the rear in the transport direction to position it at the printing position, and a printing table that covers the entire left and right edges of the work after setting the printing position. Incorporated into the printing table and a clamping mechanism for clamping the, after the completion of printing by the squeegee unit to release the operation of these mechanisms, has become one which reactivated the conveying device, wherein the stop mechanism,
A plurality of stopper pins, which are slidable through stopper holes formed in the printing table, are arranged in the front and back in the transport direction, and one of these stopper pins appears and disappears alternately on the printing table each time the work is transported. The printing position setting mechanism is arranged on the back surface of the printing table, and the set plate that appears on the printing table by the operation of the set cylinder is driven by the set motor. The stop mechanism is configured to press the stopper from the rear, and the clamp mechanism is provided with the adjust base plates arranged on the left and right below the printing table so that the clamp mechanism is symmetrically slidably adjusted to the left and right positions in the transport direction. Slide base plates that slide with the base plate and are connected to each other by joint pipes arranged along the transport direction. And a slide cylinder mounted between the adjust base plate and the slide base plate so that the slide base plate slides substantially perpendicular to the adjusting base plate in the conveying direction, and is connected between the slide base plate and the slide cylinder that elastically expands and contracts. The upper joint plate is arranged stepwise on the lower joint plate that slides up and down, and the upper bridge plate that slides through the printing table is printed on the upper joint plate. A clamp plate placed on the table, and a clamp cylinder that moves the upper joint plate up and down so that the clamp plate moves up and down via the upper joint plate by vertical guide means attached to the slide base plate. Liquid photoresist coating automatic printing machine characterized by comprising. 2. A slide cylinder is fixed inside a slide base plate by a cylinder stay, and a slide adjusting bolt is integrally provided on the cylinder rod, and the slide adjusting bolt head and the slide adjusting bolt itself are screwed. A coil-shaped spring is compressed between it and the cup-shaped spring guide, and the spring plate fixed on the adjusting base plate is sandwiched between the slide adjusting bolt head and the limit switch attached on the adjusting base plate. The automatic printing machine for liquid photoresist coating according to claim 1, wherein the actuator of (1) is brought into contact with a head portion of a slide adjustment bolt protruding to the outside of the spring plate to stop the operation of the slide cylinder. 3. A clamp cylinder is fixed to the back surface of an upper joint plate arranged to fix and support a clamp plate, and the tip of the cylinder rod is fixed to a joint pipe via a floating stay. An automatic printer for applying a liquid photoresist according to item 1 or 2. 4. The clamp plate is vertically moved by a guide means along the up-down direction, and the guide means moves the lower parts of the slide base plates arranged in front and back along the work transfer direction. It is located below the upper joint plate and almost parallel to it.
The upper and lower parts of the slide shaft connected by the lower joint plate, which is connected to the upper joint plate by the lower bridge plate, and slidably inserted in the slide unit provided on the back surface of the slide base plate, are the upper joint plate, An automatic printer for applying a liquid photoresist according to any one of claims 1 to 3, which is fixed to a lower joint plate. 5. The clamp mechanism according to claim 1, wherein the clamp mechanism is incorporated in a printing device together with a clamp position adjusting mechanism capable of adjusting an initial operating position depending on a width of a work. An automatic printing machine for applying the liquid photoresist described. 6. A clamp position adjusting mechanism, wherein a clamp unit adjusting screw, which is a screw opposite to each other in a central portion of a printing table, is made to be orthogonal to a conveying direction of a work, and is freely rotatable by rotating a clamp plate adjusting handle. 6. An automatic printing machine for liquid photoresist coating according to claim 5, wherein the clamp unit adjusting screw is fixedly mounted on the adjusting base plate and screwed to each end of the adjusting screw.