JPH11291449A - Screen printing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clear away easily the paste sticking to a-squeegee and a scraper. SOLUTION: On replacement of paste or other occasions, connection of a squeegee support plate 290 and a scraper support plate 292 is canceled by a plate connecting device 306 and the squeegee support plate 290 and the scraper support plate 292 are separated from each other sufficiently. Since a space between a squeegee 320 and a scraper 368 is thereby enlarged sufficiently, an operation of recovering the paste being present mainly on the side opposite to the squeegee 320 and the scraper 368 is performed efficiently and also an operation of clearing away the paste sticking to the squeegee 320 and the scraper 368 is facilitated. Thus, an operating time is shortened and also execution of sufficient cleaning is enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen printing apparatus, and more particularly to a technique for mechanically separating a squeegee and a scraper provided close to each other.

[0002]

2. Description of the Related Art By moving a squeegee forward, a paste placed on a screen of a plate making machine is pushed in one direction to perform screen printing. A screen printing apparatus of a type in which a squeegee is pushed back in the other direction at least until the squeegee retreats and passes a printing pattern is known. In such a screen printing apparatus, in general, the squeegee and the scraper are provided together on a common reciprocating member called a squeegee head, for example. The squeegee and the scraper are arranged as close as possible to reduce the ineffective portion of the squeegee.

[0003]

By the way, in screen printing, when the same pattern is printed using different pastes using the same plate, only the paste is replaced without removing the plate in order to prevent a printing position shift. There is a need. For example, when a pattern having a large film thickness called a rib or a partition of a PDP (plasma display) display panel is formed by lamination of screen printing, only an upper layer portion is formed of a coloring material or a material having a low melting point. And so on. In such a case, in order to prevent the paste used for the screen printing from being mixed into the newly used paste, the pasting paste on the squeegee or scraper should be thoroughly cleaned and removed. Must. However, since the squeegee and the scraper are arranged close to each other with respect to the common reciprocating member as described above, the workability of the cleaning work is poor, and it has been difficult to perform sufficient cleaning. .

On the other hand, it is conceivable to raise the reciprocating member provided with the squeegee by a predetermined distance in a direction away from the plate making, or to rotate the squeegee itself rearward, that is, to the operator side. In addition, not only is the apparatus complicated because it requires a reciprocating member raising mechanism and a squeegee rotating mechanism, but it is still difficult to sufficiently clean the space between the squeegee and the scraper.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a screen printing apparatus which can easily clean a paste attached to a squeegee and a scraper. .

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is that a squeegee pushes a paste on a screen of a plate making machine in one direction, and the paste is moved in one direction by the squeegee. (A) the squeegee is provided so as to be able to abut on and separate from the screen of the plate making, and a predetermined distance from the screen of the plate making. A first reciprocating member that is reciprocated along the plate at a separated position, and (b) the scraper is provided so as to be able to contact the screen of the plate and to be separable from the screen, and a predetermined distance from the screen of the plate A second reciprocating member that is reciprocated along the plate making at a position separated by a distance, and (c) the second reciprocating member To reciprocate member together with the first reciprocating member, and a reciprocating member connecting device for connecting the second reciprocating member removably with the first reciprocating member is to contain.

[0007]

According to the above configuration, the squeegee and the scraper are provided on the first and second reciprocating members which are reciprocally moved along the plate making, respectively. When the first reciprocating member and the second reciprocating member are connected by the device, they are reciprocally driven integrally with each other, so that the squeegee is brought into contact with the screen of the plate making as in the related art. By being advanced in the, the paste on the screen of the plate making is stretched in one direction and screen printing is performed, and the scraper is moved backward in a state of being in contact with the screen of the plate making, so that the squeegee The paste moved in one direction is pushed back to the other direction. When the paste is replaced, the first reciprocating member and the second reciprocating member are disconnected from each other by the reciprocating member connecting device, and the first reciprocating member and the second reciprocating member are sufficiently separated from each other. . For this reason, the distance between the squeegee provided on the first reciprocating member and the scraper provided on the second reciprocating member is made sufficiently large, so that the paste mainly present on the side opposite to the squeegee and the scraper is recovered. The work is performed efficiently, and the work of cleaning the paste adhered to the squeegee and the scraper is facilitated, so that the work time is reduced and sufficient cleaning is possible.

[0008]

In another preferred embodiment of the present invention, (d) the squeegee provided on the first reciprocating member is driven to a position at which the squeegee can be brought into contact with the screen for plate making and a position separated from the screen. A squeegee vertical cylinder, and (e) the scraper is provided on the second reciprocating member, and when the squeegee is at a position separated from the screen, the scraper is set at a position where the scraper can be brought into contact with the screen of the plate making. A scraper vertical cylinder for setting the scraper away from the screen when the scraper is brought into contact with the screen; and (f) provided on the first reciprocating member and the second reciprocating member.
In a state in which the reciprocating member and the second reciprocating member are connected to each other, the pressure chamber of the squeegee vertical cylinder and the pressure chamber of the scraper vertical cylinder communicate with each other. When the reciprocating member is separated from the reciprocating member, a pressure pipe for opening communication between the pressure chamber of the squeegee vertical cylinder and the pressure chamber of the scraper vertical cylinder is further provided. With this configuration, the distance between the squeegee provided on the first reciprocating member and the scraper provided on the second reciprocating member is limited to the pressure pipe between the squeegee vertical cylinder and the scraper vertical cylinder. It can be freely enlarged without
There is an advantage that the paste can be cleaned without being disturbed by the pressure pipe.

Preferably, (g) a plate making fixing frame for fixing the plate making in a state where its screen is inclined,
(h) provided between the fixing member integral with the plate-making fixing frame and the second reciprocating member, when the second reciprocating member is pushed up by the first reciprocating member and reaches the fixing position. A locking device that automatically engages and locks the second reciprocating member in the fixed position. By doing so, prior to the cleaning of the paste, the first reciprocating member is driven obliquely upward and the second reciprocating member is pushed up to its fixed position.
Since the second reciprocating member is automatically locked by the locking device, the second reciprocating member can be easily separated from the first reciprocating member and fixed to prevent the second reciprocating member from dropping. There is an advantage that no operation is required.

Preferably, (i) the second reciprocating member is provided on the first reciprocating member, and when the connection by the reciprocating member connecting device is released, the second reciprocating member is pushed up and separated by a predetermined distance or more. A lifting cylinder is further included. With this configuration, the second reciprocating member can be easily separated from the first reciprocating member, and the second reciprocating member can be connected to the locking device by the shock absorbing action of the air-operated lifting cylinder. There is an advantage that a shock when being brought into contact is reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a screen printing apparatus 10 for a large substrate according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of the screen printing apparatus 10, and FIG. 2 is a front view. In FIG. 1, the squeegee driving device 12 is shown by a cover that covers the squeegee driving device. In FIG. 2, the alignment substrate position detecting device 13, a squeegee driving device 12 described later, and the like are removed.
In FIG. 2, the right portion R is a printing position for performing screen printing on a substrate 42 described later, and the left portion L is a replacement position for replacing the substrate 42 by a handling device (not shown). Prior to printing of the replaced new substrate 42, a pair of position marks on the substrate 42 detected by the pair of alignment substrate position detection devices 13 are printed by the vertical table 11 described later.
This is also a position that is positioned at a printing position set in advance by the XY-θ position adjustment function of No. 4.

The screen printing apparatus 10 is provided with a machine frame or frame 14 which has a horizontally long rectangular frame shape when viewed from the front and a right triangle frame when viewed from the side. This frame 14
Is a rectangular frame-shaped base frame 18 having a plurality of floor pads 16 that come into contact with a horizontal installation surface, that is, a floor surface, and a vertical direction from a pair of corners of the non-operator (back side) side of the base frame 18. A pair of vertical pillars 22 erected at the top and interconnected by a horizontal connecting beam 20 at the upper end of each other;
A pair of diagonal columns 24 erected from the pair of corners on the worker (front) side of the base frame 18 at, for example, about 60 degrees and connected to the upper end of the vertical column 22;
The upper horizontal frame 26 and the lower horizontal frame 2 fixed to the upper end and the lower end of the pair of oblique pillars 24 and laid horizontally between the upper end and the lower end, respectively.
8 is provided. The rigidity of the upper horizontal frame 26 and the lower horizontal frame 28 is increased by reinforcing members 30, 32, and 34 connected to their intermediate portions.

As shown in FIG. 3, the plate making 36 used in the screen printing apparatus 10 is, for example, 1500
This is for printing a very large thick film having an outer shape of about (vertical) mm × 1800 (horizontal) mm. The rectangular frame 38 is made of a light alloy such as an aluminum alloy and is stretched on one surface of the rectangular frame 38. The screen 40 is formed by removing an uncured portion which is shielded from light during exposure after application of an emulsion made of a photocurable resin to a predetermined thickness, that is, when the emulsion is cured. A negative of the image to be printed is formed. Screen 4
Since the paste can pass through only the portion where the photocurable resin coating is removed among 0, thick film printing of a desired pattern can be performed on a large substrate 42 for a 40-inch plasma display, for example. is there. In the upper horizontal frame 26 and the lower horizontal frame 28, a plurality of (six in this embodiment) plate making for holding or gripping the plate making 36 at about 60 degrees and fixing it to the frame 14 is performed. A holding device 44 is provided. The upper horizontal frame 26 and the lower horizontal frame 28 function as a plate making fixing frame for fixing the plate making 36 in a state inclined at about 60 degrees.

On the upper horizontal frame 26 and the lower horizontal frame 28, a pair of longitudinal first guide plates 46 having a guide surface facing one surface of the plate making 36, that is, a surface of the rectangular frame 38 on the screen 40 side, A pair of elongate second guide plates 48 having guide surfaces opposed to the end surfaces of the first and second guide plates 36 and 36 are fixed so as to be horizontal, respectively. The plate making 36 is guided in the horizontal direction. A plurality of spherical rotating bodies 50 are provided so as to slightly protrude from the guide surfaces of the first guide plates 46, respectively, and a plurality of spherical rotating bodies 50 are provided on the cylinders from the guide surfaces of the second guide plates 48 fixed to the lower horizontal frame 28. A pair of transfer rollers 54 made of resin such as nylon resin or fluororesin, which are protruded by 52, are provided. When replacing the relatively heavy plate making 36, the plate making 36 or a new plate making 36 is replaced. 2 is moved in the horizontal direction, that is, in the horizontal direction in the front view of FIG. 2, the rotation resistance of the spherical rotating body 50 and the resin-made transport roller 54 reduces the movement resistance. The first guide plate 46 and the second guide plate 48
Are the upper horizontal frame 26 and the lower horizontal frame 28
Is fixed via a predetermined spacer member.
For example, in the lower horizontal frame 28, FIGS.
As shown in (1), the first guide plate 46 is fixed via a long member 56 having a square cross section fixed to the upper surface of the lower horizontal frame 28, and a spacer member 58 fixed to the front surface of the long member 56. ing.

As shown in detail in FIGS. 3 to 5, the plate making and holding device 44 is fixed to the spacer member 58 in cutouts 59 provided at three positions in the longitudinal direction of each first guide plate 46. The first guide plate 46 is provided by the guide rail 60.
Is fixed to the longitudinal member 56 and a contact plate 62 provided so as to be movable in the thickness direction of the first guide plate 46 or the plate making 36 by being guided in a direction perpendicular to the guide surface of A contact plate driving cylinder 64 that drives the contact plate 62 in the thickness direction to move it, and a plate-like plate for setting the plate interval D1 between the screen 40 of the plate making 36 and the substrate 42 during screen printing. A plate gap gauge 66, which is a thickness gauge, and a permanent magnet 68 for attracting the plate gap gauge 66 on the bottom surface, and a fitting hole 70 for removably fitting the plate gap gauge 66 is provided in the upper half of the front surface. The game machine is formed integrally with the movable part 74 of the slide cylinder 72 fixed to the longitudinal member 56 and is positioned at two vertical positions parallel to the screen 40 of the plate making 36. A holding member 76, a backup member 78 fixed to the longitudinal member 56 in a state of slidably abutting against the back surface of the gauge holding member 76 to receive a squeezing load, and a pressing pad 80 are fixed to the tip. And an output rod 82 capable of being protruded toward the contact plate 62 by air pressure, and a clamp cylinder 86 fixed to the lower horizontal frame 28 via a bracket 84.

The plate interval D1 between the screen 40 of the plate making 36 and the substrate 42 (dashed line in FIG. 3) raised during screen printing is one of the setting conditions for screen printing. It is necessary to change according to the mesh, the fineness of the lines of the print pattern, the viscosity of the paste, and the like. In the screen printing apparatus 10 according to the present embodiment, the plate making holding device 44 configured as described above
The confirmation of the plate interval D1 of zero and the setting of the plate interval D1 in the printing state are performed with a simple and highly reliable configuration and with high accuracy. That is, in a state where the plate making 36 is guided to a predetermined printing position, as shown by the solid line in FIGS. 3, 4, and 5, the output rod 82 is set to the non-clamping position where the output rod 82 is retracted by the clamp cylinder 86. The movable portion 74 is moved upward by the slide cylinder 72, and the plate gap gauge 66 is moved upward from a position facing the back surface of the contact plate 62, and is indicated by a two-dot chain line in FIG. As described above, since the contact plate 62 is pulled toward the non-operator side by the contact plate drive cylinder 64, the plate making 36 is also lowered to the first guide plate 46 side. And the screen 40
The operator can easily confirm zero of the plate interval D1 on the basis of the gap state between them and the mutual contact state.

Next, the contact plate drive cylinder 64 causes the contact plate 62 to protrude toward the operator, and the plate making 36 is lifted to the clamp cylinder 86, that is, the operator side, to be separated from the first guide plate 46. In this state, the plate interval gauge 66 for forming the plate interval D1 suitable for the printing conditions is replaced with the plate interval gauge 66, and mounted in the fitting hole 70 of the gauge holding member 76. The plate gap gauge 66 has a thickness substantially obtained by adding the plate gap D1 and the depth of the fitting hole 70. Next, the movable portion 74 is moved to the lower position by the slide cylinder 72 and the plate gap gauge 66 is moved to the contact plate 6.
2 and when the contact plate 62 is pulled toward the non-operator by the contact plate drive cylinder 64, the plate gap gauge 66 is placed between the contact plate 62 and the backup member 78. And the gauge holding member 76 are pressed together, so that only the part that forms the plate interval D1 is
2 is projected toward the clamp cylinder 86 side. In this state, the output rod 82 of the clamp cylinder 86 is protruded, and the rectangular frame 38 is pressed between the pressing pad 80 at the tip thereof and the contact plate 62, so that the plate interval D1 is reliably formed. The plate making 36 is fixed in this state.

As a result, compared with the case where a complicated mechanism for continuously varying the plate interval D1 is provided, not only is the size and size reduced, the mounting space is reduced, but also the maintenance is facilitated. , Set plate interval D1
Reliability is improved. That is, with the configuration in which the plate gap gauge 66 is pinched by the contact plate drive cylinder 64 and the clamp cylinder 86, there is no change in the once set plate gap D1, and the reliability is improved. Further, since the plate interval gauge 66 can be easily replaced, the number of steps for setting the plate interval is advantageously reduced.

Further, a fitting hole 70 into which the plate gap gauge 66 is removably fitted is provided at an upper part of the front surface, and a rectangular frame 38 which is an outer peripheral portion of the plate making 36 and a backup member 78 which is a position fixing member. And the gauge holding member 76 is moved between a position where the plate interval gauge 66 is inserted between the backup member 78 and the plate making 36 and a position where it is not inserted. A plate gap gauge holding device 88 is constituted by the slide cylinder 72 functioning as an actuator for causing the plate gap gauge 66 to be inserted without the plate gap gauge 66 being inserted by the plate gap gauge holding device 88. When the plate making 36 is pressed by 80, the plate gap gauge 6 is placed between the pressing pad 80 and the backup member 78.
6, the plate gap D1 can be confirmed to be zero, and since the fitting hole 70 is formed above the gauge holding member 76, the plate gap gauge 66 can be easily replaced.

A rectangular frame 38 which is an outer peripheral portion of the plate making 36 is provided.
A contact plate 62 provided between the plate gap gauge 66 and the pressing pad 80 so as to be movable in the pressing direction and the counter pressing direction, and driving the contact plate 62 in the pressing direction. By pressing the plate gap gauge 66 between the back surface thereof and the backup member 78, or by driving the contact plate 62 in the above-mentioned anti-pressing direction, an actuator capable of moving the gauge holding member 76 in the vertical direction is provided. Since the contact plate drive cylinder 64 that functions is provided, the plate making 36 is lifted up by the contact plate 62 and the gauge holding member 76 is moved upward, so that the plate making 36 can be easily performed regardless of the load of the plate making 36. There is an advantage that the plate interval gauge 66 can be replaced.

Further, the frame 14 includes a pressing pad 80 functioning as a pressing member, and an output rod 82 having the pressing pad 80 fixed to the distal end.
From the clamp cylinder 86 fixed to the clamp device 9
0, and the press pad 80 is pushed toward the backup member 78, which is a position fixing member, so that the plate making 36 is sandwiched between them. And has the advantage of being easily fixed.

Further, the contact plate 62 is provided with the plate gap gauge 6.
6 is provided between the backup member 78 and the plate-making plate 36, the thickness of the plate 40 is larger than the thickness which is increased by the insertion of the plate 6 between the backup member 78 and the plate-making plate 36. In addition, the fitting hole 70 is partially cut out so that the plate gap gauge 66 fitted into the fitting hole 70 can be pulled out toward the center of the screen 40. There is an advantage that the plate gap gauge 66 fitted in the fitting hole 70 of the holding member 76 can be easily replaced.

Returning to FIG. 1, the frame 42 carries the substrate 42 before printing from the substrate replacement position L to the printing position R,
Alternatively, a substrate transport device 100 for transporting the printed substrate 42 from the print position R to the substrate replacement position L is provided. The substrate transfer device 100 is mounted on the upper horizontal frame 26 and the lower horizontal frame 28 of the frame 14 by two transfer rails 102 which are fixed in a horizontal direction, that is, an X direction to be described later. A substrate transport table 104 guided in an inclined state parallel to the plate making 36 between a position R and a transport driving device 106 for reciprocatingly driving the substrate transport table 104 to a substrate replacement position L and a printing position R; ing.

As shown in FIG. 1, the substrate carrier 104
Is a plate-shaped carrier main body 110 guided by the transport rail 102, and the carrier main body 1 is guided by a guide rod 112.
The plate making 3 is guided in a direction perpendicular to
A plate-shaped upper and lower table 114 is provided on the carrier main body 110 so as to be able to approach and separate from the table 6, and an upper and lower table driving cylinder 116 which functions as a driving device for driving the upper and lower table 114. The transport driving device 106 includes a pair of endless belts 12 partially fixed to upper and lower ends of the transport base body 110.
0 through the bearings 122 on the frame 14 in a posture perpendicular to the conveyance direction of the carriage main body 110 in a plane including the two conveyance rails 102, that is, a plane parallel to the screen surface of the plate making 36. A rotation shaft 124 rotatably supported, a pair of pulleys 126 fixed to both ends of the rotation shaft 124 and around which the pair of endless belts 120 are wound, and a rotation shaft 124 fixed to a central portion of the rotation shaft 124. Pulley 134 around which an endless belt 132 is wound together with a pulley 130 fixed to the output shaft of the drive motor 128
And Thus, the substrate transport table 104 is reciprocally driven between the substrate replacement position L and the printing position R by the drive motor 128.

FIG. 6 is a front view showing the vertical table 114 of the substrate transfer table 104, FIGS. 7 and 8 are bottom and side views thereof, and FIG. 9 is a front view of the vertical table 114 showing a state in which the moving plate 146 is removed. FIGS. 10 and 10 are front views of the upper and lower tables 114 in a state where the moving plate 146 and the second upper and lower base plates 144 have been removed.

As shown in detail in the above figure, the upper and lower tables 114 of the substrate transport table 104 are arranged at the substrate replacement position L or the printing position R in the X direction position, the Y direction position, and the rotation angle position θ of the substrate 42 with respect to the plate making 36. Table also serves as an XYθ table for finely adjusting automatically or manually, a rectangular first upper and lower base plate 138 to which the guide rod 112 is fixed, and a plurality of A rectangular second upper / lower base plate 144 fixed on the first upper / lower base plate 138 via a plate-like spacer 140;
A moving plate mounted on the second upper and lower base plates 144 so as to be capable of relative movement in a direction parallel to the second upper and lower base plates 144 for mounting or supporting the substrate 42 in a state of being positioned by a positioning member (not shown). 146 and a pair of members provided on the first upper and lower base plates 138 and the second upper and lower base plates 144 for gripping the moving plate 146 in the X direction (in this embodiment, the left and right direction as viewed from the operator). hand,
The X-direction drive pin 148 driven in the X-direction based on the electric signal, the X-direction urging pin 150 to which a predetermined urging force directed toward the X-direction drive pin 148 is applied, and the moving plate 146 being moved in the X-direction. Are provided on the first upper and lower base plates 138 and the second upper and lower base plates 144 for gripping in the Y direction orthogonal to the X direction (in this embodiment, the vertical direction when viewed from the operator) at a predetermined distance A. A first Y-direction driving pin 1 which is a pair of members and is driven in the Y-direction based on an electric signal;
52 and the second Y-direction drive pin 154 and its first
Y-direction drive pin 152 and second Y-direction drive pin 154
A first Y-direction urging pin 156 and a second Y-direction urging pin 158 to which a predetermined urging force is applied.

Thus, the second upper and lower base plates 14
The moving plate 146 placed on the upper side 4 is gripped by the X-direction driving pin 148 and the X-direction urging pin 150 with a predetermined urging force in the X direction, and the first Y-direction driving pin 152 and the first Y-direction urging. Pin 156 and 2nd Y
Since the X-direction drive pins 148 are moved by the predetermined drive force in the Y direction by the direction drive pins 154 and the second Y-direction bias pins 158, the substrate 42 supported by the moving plate 146 is moved.
Of the first Y-direction drive pin 152 and the second Y-direction drive pin 15 are adjusted in the X direction.
4 is moved by the same amount, so that the moving plate 1
The position of the substrate 42 supported by 46 with respect to the plate making 36 is Y
The rotation position θ of the substrate 42 supported by the moving plate 146 with respect to the plate making 36 is adjusted by moving the first Y-direction drive pin 152 and the second Y-direction drive pin 154 in different amounts or in different directions. . Therefore, the second upper and lower base plates 14
4, an X-direction moving plate guided by a guide rail so as to be movable in the X-direction, an X-direction fine movement adjusting device for finely moving the X-direction moving plate in the X direction, an X-direction locking device for locking the X-direction moving plate, A Y-direction moving plate guided by the guide rail so as to be movable in the Y-direction on the X-direction moving plate, a Y-direction fine movement adjusting device for finely moving the Y-direction moving plate in the Y direction, and a Y for locking the Y-direction moving plate. Directional lock device, rotary plate rotatably provided about its center in Y-direction movable plate, fine rotation adjustment device for finely adjusting the rotation angle position of the rotary plate, rotary lock device for locking the rotary plate Since the X, Y, and θ adjustment mechanisms can be configured without using such devices, screen printing is performed because the volume is reduced and the space for the adjustment is reduced. Along with the location 10 is a thin,
The weight of the X, Y, θ adjustment mechanism is reduced, the mechanism for reciprocating it is also reduced, and the number of parts is reduced, so that the screen printing apparatus is light and inexpensive.

The second upper and lower base plates 144 have a width similar to that of the first upper and lower base plates 138, but are sufficiently smaller than the vertical size of the first upper and lower base plates 138, for example, 以下 or less. As shown in detail in FIG. 11, the first upper and lower base plates 138 are provided via plate-like spacers 140.
The lower plate 160 fixed on the upper plate, the upper plate 162 fixed in close contact with the upper surface of the lower plate 160, and a comparison in which the upper plate 162 is arranged at predetermined intervals through the upper plate 162 A plurality of gas holes 164 having a relatively small diameter, and a communication recess 166 formed on the upper surface of the lower plate 160 to allow the plurality of gas holes 164 to communicate with each other on the back surface of the upper plate 162. In this state, a plurality of gas holes 164 are provided. The communication recess 166 is provided with a negative pressure supply device 1 for sucking the moving plate 146 to the second upper and lower base plates 144 by setting the inside of the gas hole 164 to a negative pressure via the switching control valve 168.
70 and a compressed gas supply device 172 for discharging a compressed gas from the gas holes 164. The switching control valve 168 is connected to the moving plate 1
During the movement period of 46, the compressed gas is supplied from the compressed gas supply device 172 to the communication recess 166 of the second upper and lower base plate 144. After the positioning of the movable plate 146 is completed, the negative pressure supply device 170 supplies the second upper and lower base plate 1.
The moving plate 146 is fixed to the second upper and lower base plates 144 by supplying a negative pressure to the communication recesses 166 at 44. The negative pressure supply device 170 is composed of, for example, a vacuum pump that outputs a negative pressure.
2 is composed of a compressor for outputting compressed air, for example.

Thus, during the movement period of the moving plate 146, the switching control valve 168 functioning as a switching control device.
Accordingly, the compressed gas is supplied from the compressed gas supply device 172 to the second upper and lower base plates 144, so that the compressed air is released from the plurality of gas holes 164 of the second upper and lower base plates 144, and the moving plate 146 and the Since a compressed gas layer or a compressed gas film is formed between the supporting second upper and lower base plates 144, the moving is performed by the X-direction driving pin 148, the first Y-direction driving pin 152, and the second Y-direction driving pin 154 driven according to the electric signal. While the plate 146 is moved with an extremely small force, after the positioning of the moving plate 146 is completed, the switching control valve 168 supplies a negative pressure from the negative pressure supply device 170 to the second upper and lower base plates 144. The inside of the plurality of gas holes 164 of the second upper and lower base plates 144 is set to a negative pressure to Since DOO 146 is adsorbed to the second upper and lower base plates 144 for supporting the movement plate 146 is securely fixed. Therefore, the moving plate 1
There is no need for a guide rail or the like for moving the 46 in the X and Y directions or the rotation direction θ, and there is an advantage that the screen printing apparatus 10 is simple and small. In addition, the moving plate 14
6 is supported by the second upper and lower base plates 144 via the compressed gas layer during the movement, so that an X-direction position moving device 180, a first Y-direction position moving device 182, and a second Y
There is an advantage that the motor and the screw shaft in the directional position moving device 184 are significantly reduced in size.

An X-direction drive pin 148 engaged with an end surface of a side parallel to the Y direction of the moving plate 146, a first Y-direction drive pin 152 engaged with an end surface of a side parallel to the X direction of the movable plate 146, and a The 2Y-direction drive pin 154 functions as an X-direction drive member and a Y-direction drive member, and has a circular cross section by being formed of, for example, a miniature bearing or a small-diameter bearing. The X-direction drive pin 148 and the first
Y-direction drive pin 152 and second Y-direction drive pin 154
Is provided in the X-direction position moving device 180, the first Y-direction position moving device 182, and the second Y-direction position moving device 184, respectively. X-direction position moving device 18
0, the first Y-direction position moving device 182, and the second Y-direction position moving device 184 are configured as shown in FIGS. Hereinafter, those structures will be described as representative of the X-direction position moving device 180.

11 and 12, an X-direction position moving device 180 includes a screw shaft 188 in a direction parallel to the X direction rotatably supported on a first upper and lower base plate 138 via a bearing 186, and the screw shaft 188. An X-direction pulse motor 190 connected to and connected to the first and second base plates 188; a guide rail 192 fixed to the first upper and lower base plates 138 in a direction parallel to the X-direction; The screw shaft 1 is guided in the X direction and is screwed to the screw shaft 188.
A moving block 194 that is moved by a distance corresponding to the rotation angle of 88, and an X-direction notch 196 cut from the edge of the second upper and lower base plates 144 in the X direction, protrudes from the moving block 194 and is housed therein. Arm 198 and the cylindrical outer peripheral surface are in contact with the end surface of the moving plate 146 parallel to the Y direction, and the center line of curvature of the outer peripheral surface is the second.
An X having a circular cross section attached to the tip of the arm 198 so as to be perpendicular to the upper and lower base plates 144.
A direction drive pin 148.

An X-direction urging pin 150 is engaged with an end face of a side parallel to the Y direction of the moving plate 146 to grip the moving plate 146 together with the X-direction driving pin 148.
And a first Y gripping the movable plate 146 together with the first Y-direction drive pin 152 and the second Y-direction drive pin 154 by engaging with an end surface of a side parallel to the X direction of the movable plate 146.
The direction urging pin 156 and the second Y direction urging pin 158 correspond to the X direction urging device 200 and the first Y direction urging device 202.
And the second Y-direction urging device 204. The X-direction urging device 200, the first Y-direction urging device 202, and the second Y-direction urging device 204
It is configured as shown in FIGS. Hereinafter, those configurations will be described as representative of the X-direction urging device 200.

13 to 15, the X-direction urging device 200 includes an urging cylinder 206 fixed to the back surface of the second upper and lower base plate 144 and an urging cylinder 20.
6, an output plate 212 fixed to one end of the output rod 208 by a guide rod 210 parallel to the output rod 208 and prevented from rotating around the axis thereof;
The arm 216 protruding into the X-direction notch 214 formed by being cut in the X-direction from the edge of the second upper and lower base plate 144 and housed therein, and the cylindrical outer peripheral surface are parallel to the Y-direction of the moving plate 146. And the center line of curvature of the outer peripheral surface is in contact with the second upper and lower base plates 14.
And an X-direction urging pin 150 having a circular cross section attached to the distal end of the arm 216 so as to be perpendicular to the arm 4. The urging force corresponding to the pressure supplied to the urging cylinder 206 is urged in the X direction. It is provided from the pin 150 to the moving plate 146.

As described above, the X-direction drive pins 148, X
Direction urging pin 150, first Y-direction drive pin 152, first
The Y-direction urging pin 156, the second Y-direction driving pin 154, and the second Y-direction urging pin 158 are circular in cross section, and have two sides parallel to the Y direction and two sides parallel to the X direction of the rectangular moving plate 146. Moving plate 1
Since the pins 46 are held by the predetermined urging force, even if the contact positions of the pins with respect to the moving plate 146 are shifted, there is no effect on the adjustment position of the moving plate 146 and no backlash occurs. Therefore, there is an advantage that high positioning accuracy can be obtained.

As shown in detail in FIG. 16, the second upper and lower base plates 144
6 is provided with a lock device 220 for appropriately fixing 6. The moving plate 146 has a small-diameter hole 222 formed on the first upper and lower base plates 138 side, and a large-diameter hole 224 following the small-diameter hole 222 formed on the substrate 42 side. Hole 224
Is penetrated through the moving plate 146. The lock device 220 includes a fixed cylinder 226 fixed to the back surface of the second upper and lower base plates 144.
A predetermined gap D2 with respect to the inner peripheral surface of the large-diameter hole 224.
And a circular lock plate 228 having a small outer shape and fitted into the large-diameter hole 224. Fixed. The interval between the outer peripheral surface of the output rod 230 and the inner peripheral surface of the small-diameter hole 222 is set to be equal to or greater than the gap D2,
The movable plate 146 is movable within a plane parallel to the second upper and lower base plates 144 within the range of the gap D2, and the output rod 230 of the fixed cylinder 226 is retracted to thereby move the second upper and lower base plates. The moving plate 146 is fixed to the second upper and lower base plates 144 even when the inside of the plurality of gas holes 164 of the base plate 144 is not set to a negative pressure.

FIGS. 17, 18 and 19 show the upper and lower tables 114 including the first upper and lower base plates 138 and the like.
Positioning device 240 provided between the first upper and lower base plates 138 and the spacer member 58 as a position fixing member in order to increase the repetitive positioning accuracy with respect to
FIG. 17, the spacer member 58 is a position fixing member fixed to the lower horizontal frame 28 and the upper horizontal frame 26 as shown in FIGS. 3 and 5, and the positioning device 240 has
A fitting hole 242 in a direction perpendicular to the upper and lower base plates 138 is formed to penetrate therethrough. A pair of fitting members 24 fixed via
6 and a pair of fitting pin devices 248 provided on the first upper and lower base plates 138 so as to be fitted into the fitting holes 242 of the fitting members 246 when the first upper and lower base plates 138 are raised. And

The fitting pin device 248 is provided with the fitting hole 2
42 having a slightly smaller outer diameter than the fitting hole 242.
And a cylindrical enlarged pin 250 protruding from the first upper and lower base plates 138 to the spacer member 58 side, that is, the plate making 36 side, and an insertion pin 252 fitted inside the enlarged diameter pin 250. And an insertion pin driving cylinder 254 fixed to the back surface of the first upper and lower base plates 138 and functioning as an insertion pin driving device for driving the insertion pins 252 in the axial direction.

As shown in detail in FIGS. 18 and 19,
A plurality (eight in the present embodiment) of slits 2 cut from the tip along a plane passing through the center axis thereof at equal intervals in the circumferential direction are formed in the cylindrical enlarged diameter pin 250.
56 and a tapered inner peripheral surface 258 having a smaller diameter toward the distal end on the inner peripheral surface.
The outer peripheral surface of the taper 52 also has a tapered outer peripheral surface 260 whose diameter decreases toward the tip. For this reason, 2 in FIG.
The first upper and lower base plates 138 are moved closer to the plate making 36 to the position shown by the dashed line, so that the fitting member 246 is formed.
When the insertion pin 252 is driven to the distal end side by the insertion pin driving cylinder 254 in a state in which the diameter-enlarging pin 250 is fitted in the fitting hole 242, the tapered outer peripheral surface 260 is The outer diameter of the diameter-enlarging pin 250 is expanded by being pushed by the surface 258, the fitting member 246 and the fitting pin device 248 are centered, and the upper and lower tables 114 and the substrate 42 placed thereon are moved with respect to the plate making 36. Positioning with high precision. In addition, fitting hole 2
Since the positioning is performed by expanding the diameter of the diameter-enlarging pin 250 fitted in the hole 42, it is not necessary to provide a tapered surface in the fitting hole 242, and there is an influence of assembly adjustment and aging. There is an advantage that the positioning accuracy is maintained.

The board carrier 104 includes a carrier body 110 guided by a carrier rail 102 between a board printing position R and a board replacement position L, and a carrier body 11
And an upper / lower table 114 provided so as to be able to approach and separate from the plate making 36 on the upper surface 0. The fitting hole 242 is a portion of the position fixing spacer member 58 corresponding to the substrate printing position R. Since the fitting pin device 248 is provided on the upper and lower table 114,
Variations in positioning due to the gap that enables the operation of the vertical mechanism for raising and lowering the vertical table 114 are also eliminated, and the positioning accuracy of the substrate 42 is further enhanced. According to the experiment of the inventor, the positioning accuracy of the substrate 42 was about 15 to 20 μm in the positive and negative directions in the conventional apparatus, whereas it was about 3 μm in the positive and negative directions in the screen printing apparatus 10 of the present embodiment. . Further, in the screen printing apparatus 10 of the present embodiment, it is not necessary to provide a sliding bearing or a mechanism for preloading the sliding bearing in the linear sliding portion guided by the transport rail 102 or the guide rod 112, so that the number of maintenance steps is reduced. There is an advantage that the number of devices is reduced and the device is inexpensive.

Further, the above-mentioned diameter-enlarging pin 250, the insertion pin 25
2. Since the fitting pin device 248 including the insertion pin driving cylinder 254 is provided on the first upper and lower base plates 138 of the upper and lower tables 114, the squeegee is compared with the case where the fitting pin device 248 is provided on the plate making side member such as the spacer member 58. There is an advantage that the driving device 12 is easily provided.

Referring back to FIG. 17, the first upper and lower base plates 138 of the block 262 fixed to the spacer member 58 are mounted on the first upper and lower base plates 138 of the upper and lower tables 114.
A stopper member 264 is provided so as to be in contact with one surface on the 38 side, so that the position of the upper and lower tables 114 moved toward the plate making 36 can be accurately determined. A plurality of sets of the block 262 and the stopper member 264 may be provided, or one set may be provided. In addition, 26
Reference numeral 6 denotes a shock absorber for suppressing vibration generated due to contact at the rising and falling ends of the first upper and lower base plates 138.

As shown in FIG. 20, for example, a V-groove 268 is formed in the block 262, and a tapered portion 270 whose width decreases toward the distal end to fit into the V-groove 268 in the stopper member 264. May be formed. By doing so, the positioning accuracy is further enhanced. In order to obtain sufficient positioning accuracy, the positioning device 240 is provided in at least two places, that is, two or more, or one positioning device 240 and the block 262 shown in FIG. May be provided. In the latter case, V groove 2
It is desirable that the axis of the positioning device 240 be present on the extension of 68.

Next, the squeegee driving device 12 shown in FIG.
Will be described with reference to FIGS. 21 to 25. FIG. 21 is a front view showing the squeegee driving device 12, FIG. 22 is an enlarged view showing a main part of the squeegee driving device 12, and FIG.
III-XXIII is a sectional view of the squeegee driving device 12;
24 is a cross-sectional view showing a state where the scraper 368 is latched, and FIG. 25 is a squeegee-side coupling 392 and a scraper-side coupling 39.
FIG. 4 is a cross-sectional view illustrating a state of attachment to a squeegee support plate 290 and a scraper support plate 292 of FIG.

The squeegee driving device 12 pushes a paste (not shown) placed on the screen 40 of the plate making machine 36 in one direction (upward in FIG. 21) along the screen 40 during screen printing. This is for pushing back the paste moved in one direction on the return path to the other direction (downward in FIG. 21). In FIG. 21, the squeegee driving device 12 is guided in a direction perpendicular to the plate making 36 in a state parallel to the plate making 36 by two pairs of guide rails 280 provided on the upper horizontal frame 26 and the lower horizontal frame 28, respectively. Further, a rectangular frame 284 is provided which is moved toward and away from the plate making 36 by two pairs of cylinders 282 provided on the upper horizontal frame 26 and the lower horizontal frame 28, respectively. The drive base plate 2 is connected to the upper end of the rectangular frame body 284 through a plurality of (four in this embodiment) connection bars 286.
88 are connected.

A pair of guide rails 289 are fixed to the left and right sides of the rectangular frame 284 along the longitudinal direction. The squeegee support plate 290 and the scraper support plate 292 are connected to the pair of guide rails. The left and right ends are guided by 289 so as to be independently reciprocable along the plate 36 at a position separated from the screen 40 of the plate 36 by a predetermined distance toward the operator. Two pairs of bearings 294 are provided in the lower part of the left and right sides of the rectangular frame 284 and the drive base plate 288, and a pair of screws whose upper end and lower end are rotatably supported by the bearings 294. A shaft 296 is provided in parallel with the guide rail 289. Drive base plate 28
8, a reduction gear 298 and a driving motor 300 are fixed. One of the pair of screw shafts 296 is connected to a driving motor 300 via a reduction gear 298 connected to the upper end thereof.
And a pair of screw shafts 296 are operatively connected via a belt 304 wound around a pulley 302 fixed to their upper ends. As a result, the squeegee support plate 290 having both ends screwed to the pair of screw shafts 296 and the scraper support plate 292 connected thereto are connected to the drive motor 300.
As a result, the plate 36 is integrally reciprocated along the plate 36 at a position separated from the screen 40 by a predetermined distance. In this embodiment, the squeegee support plate 290 and the scraper support plate 292 are used.
Function as a first reciprocating member and a second reciprocating member.

The squeegee support plate 290 and the scraper support plate 292 are detachably connected by a pair of left and right plate connection devices 306 provided at both ends of the squeegee support plate 290. As shown in detail in FIG. 24, the plate connecting device 306 includes a connecting plate 308 protruding from the squeegee supporting plate 290 to the upper side of the scraper supporting plate 292, and a distal end of the connecting plate 308 approaching and separating from the scraper supporting plate 292. The scraper supporting plate 29 is urged toward the scraper supporting plate 292 by a spring (not shown).
And a connection pin 312 to be engaged in an engagement hole 310 formed on the upper surface of the second connector 2.

As shown in detail in FIGS. 22 and 23,
The squeegee support plate 290 has a squeegee 320
Squeegee upper and lower cylinders 322 for driving the squeegee to a position where it comes into contact with and presses down the screen 40 of the plate making machine 36 and a position spaced a predetermined distance from the screen 40.
And an intermediate height position stopper cylinder 324 that functions as an intermediate height stopper for setting the squeegee 320 to an intermediate height at which the tip of the squeegee 320 is just in contact with the screen 40, and an ascent limit position stopper 326 that sets the ascent limit position of the squeegee 320. Are provided. The squeegee 320 has a longitudinal shape slightly shorter than the width dimension of the plate-making plate 36, and has a longitudinal band-shaped squeegee body 328 made of an elastic material such as synthetic rubber or natural rubber such as urethane rubber, and the squeegee body 32.
8 and a metal squeegee holding member 330 for holding the squeegee 8. The squeegee vertical cylinder 322
Is provided with an adjusting screw 332 having a lock function for setting the protrusion height of the output rod, that is, the lower limit position of the squeegee 320. The intermediate height position stopper cylinder 324 is provided with an adjusting screw 334 with a lock function for setting the protruding length of the output rod, that is, the intermediate height stopper position of the squeegee 320. Further, the ascending limit position stopper 326 is provided with an adjusting screw 336 with a lock function for setting the height position of its lower end, that is, the ascending limit position of the squeegee 320.

A squeegee holding device 340 for holding the squeegee 320 is connected to the tip of the output rod 338 of the squeegee vertical cylinder 322. The squeegee holding device 340 has a long plate shape with both ends protruding downward, and both ends in the longitudinal direction are guided by a pair of guide rails 342 fixed downward on the lower surface of the squeegee support plate 290. Thus, the upper and lower members 346 are guided in a direction perpendicular to the screen 40, and have a longitudinal central portion connected to the output rod 338 via a swing coupling 344. The vertical position adjustment member 352 is provided so as to be adjustable in the vertical direction by an adjustment screw 348 and is fixed by a vertical movement fixing screw 350. A longitudinal turning position adjusting bar 356 that is attached so as to be capable of being fixed and fixed by a turning fixing screw 354;
U-shaped engaging members 360 which are provided at equal intervals in the longitudinal direction of the squeegee 56 and engage and grip a pair of engaging grooves 358 formed on the outer surface of the squeegee holding member 330 of the squeegee 320. And a fixing screw 362 screwed to the engaging member 360 to fix the engaging member 360 to the rotation position adjusting bar 356.
4 is provided.

Thus, the squeegee 320 is vertically driven by the squeegee vertical cylinder 322 to a position where the squeegee main body 328 is separated from the screen 40 and a position where the squeegee body 328 is pushed down, and the output rod of the stopper cylinder 324 at the intermediate height position. When the squeegee is protruded downward, it is driven upward by the squeegee vertical cylinder 322 so that the squeegee main body 328 is located at a position where the squeegee main body 328 comes into contact with the screen 40 just or lightly. The contact angle α of the squeegee body 328 with respect to the screen 40 is adjusted by changing the rotation angle of the rotation position adjustment bar 356, and the squeegee 320 adjusts the vertical position adjustment member 35.
The position or strength of the screen 40 of the squeegee main body 328 to be pushed down is adjusted by changing the position of the squeegee 328 with the adjusting screw 348.

As shown in detail in FIG. 22, a scraper 368 is attached to the scraper support plate
6, a scraper vertical cylinder 370 for driving the screen 40 to a position where it is pressed down further and a position spaced a predetermined distance from the screen 40, and a guide rail 3 fixed to the scraper support plate 292.
An upper / lower member 374 which is guided movably in the up / down direction by 72 and is driven in the up / down direction by the scraper up / down cylinder 370, and is provided so that the relative position in the up / down direction with respect to the up / down member 374 can be adjusted and fixed vertically. Longitudinal vertical position adjusting member 37 fixed by screw 376
8, a longitudinal rotation position adjustment bar 380 that is rotatably attached to the vertical position adjustment member 378 around the axis and is fixed by a rotation fixing screw (not shown);
In order to fix the scraper 368, a plurality of fixtures 382 provided at equal intervals in the longitudinal direction of the rotation position adjusting bar 380 are provided. The above scraper 368
As shown in FIG. 24, a scraper body 384 made of a metal such as stainless steel and having a plate-like shape with both ends bent toward the squeegee 320, and a scraper body 38
Scraper connecting member 3 integrally connected to the upper end of 4
The fixing member 382 includes an engaging member 388 which engages with the scraper connecting member 386, and a fixing member 382 which engages with the scraper connecting member 386 to fix it to the rotation position adjusting bar 380. And a fixing screw 390 screwed to the mating member 388.

The scraper vertical cylinder 370 and the squeegee vertical cylinder 322 are detachably coupled to the squeegee support plate 290 and the scraper support plate 292 and connected when they are brought close to each other. And a scraper-side coupling 394 at an intermediate portion.
A pair of pneumatic pipes 396 and 398 are connected, and among a pair of pressure chambers of the scraper vertical cylinder 370, a pressure chamber that is set to a high pressure when the squeegee 320 rises and a pair of pressure chambers of the squeegee vertical cylinder 322. A pressure chamber which is set to a high pressure when the scraper 368 is lowered is connected to each other, and a pressure chamber which is set to a high pressure when the squeegee 320 is lowered and one of the squeegee vertical cylinders 322 among a pair of pressure chambers of the scraper vertical cylinder 370 are connected. Among the pair of pressure chambers, the pressure chamber which is set to a high pressure when the scraper 368 rises is connected to each other. Thereby, the scraper 36
When the squeegee 320 is lowered, the lower end (tip) of the screen 40 is moved by the scraper vertical cylinder 370.
When the squeegee 320 is lifted, the lower end (tip) thereof is positioned at a position where the scraper vertical cylinder 370 comes into contact with the screen 40.

As described above, the squeegee 320 and the scraper 368 are provided on the independent squeegee support plate 290 and the scraper support plate 292 which are reciprocally driven along the screen 40 of the plate making machine 36, respectively. When the squeegee support plate 290 and the scraper support plate 292 are connected to each other by the plate connection device 306 functioning as a device, the squeegee 320 is reciprocally driven integrally with each other. By being advanced while being in contact with the plate 40, the paste on the screen 40 of the plate 36 is pushed in one direction to perform screen printing, and the scraper 368 is brought into contact with the screen 40 of the plate 36. Let me go backwards By Rukoto, the squeegee 320
As a result, the paste moved in one direction is pushed back in the other direction.

When the paste is replaced, the connection pin 312 of the plate connection device 306 is pulled out from the engagement hole 310 by an operator, whereby the connection between the squeegee support plate 290 and the scraper support plate 292 is released. , Squeegee support plate 290 and scraper support plate 2
92 are sufficiently separated from each other. Therefore, the squeegee 320 provided on the squeegee support plate 290 and the scraper 3 provided on the scraper support plate 292
68 and the squeegee 32
The operation of collecting the paste mainly present on the side opposite to the scraper 368 and the scraper 368 is efficiently performed, and the operation of cleaning the paste adhered to the squeegee 320 and the scraper 368 is facilitated. Cleaning becomes possible. Further, as shown in detail in FIG. 25, in connection with the connection and separation of the squeegee support plate 290 and the scraper support plate 292, the pressure chamber of the squeegee vertical cylinder 322 and the pressure chamber of the scraper vertical cylinder 370 are connected to each other. Squeegee support plate 290 and scraper support plate 2
Since the squeegee-side coupling 392 and the scraper-side coupling 394 fixed to 92 are connected and opened to each other, the distance between the squeegee 320 provided on the squeegee support plate 290 and the scraper 368 provided on the scraper support plate 292 is provided. Can be freely increased without being restricted by the pneumatic pipes 396 and 398 between the squeegee vertical cylinder 322 and the scraper vertical cylinder 370, and the paste cleaning operation can be performed without disturbing the pneumatic pipes 396 and 398. There are advantages that can be done. Note that a squeegee driving device lifting device is provided in which the squeegee support plate 290, the scraper support plate 292, and the rectangular frame body 284 supporting the squeegee support plate 290 are largely separated from the plate making 36 by a cylinder 282. It is used exclusively at the time of replacement or maintenance, and is not used during normal work including the work of replacing the paste.

Here, of the upper horizontal frame 26 and the lower horizontal frame 28 functioning as a plate making fixing frame for fixing the plate making 36 with the screen 40 inclined, the upper horizontal frame 26 located above and the scraper support When the scraper support plate 292 is pushed up by the squeegee support plate 290 and reaches the fixed position, the scraper support plate 292 automatically engages with the plate 292 to lock the scraper support plate 292 at the fixed position. An apparatus 410 is provided. FIG.
As shown in detail in FIG. 4, the locking device 410 is fixed to the upper horizontal frame 26 via the bracket 412,
Upper horizontal frame 26 and scraper support plate 2
A locking groove 414 which is parallel to the moving direction of 92 and whose upper side is open and whose lower side is closed, and which is formed so as to be further away from the upper horizontal frame 26 in the depth direction of the locking groove 414. The inclined guide surface 41 adjacent to the lower side of 414
6 is attached to the scraper support plate 292 via the bracket 420 and the bracket 420, and is urged by a spring (not shown) in the depth direction of the locking groove 414 so that the leading end on the plate making 36 side is set to the above-described state. A locking pin 422 fitted in the locking groove 414. As a result, when the scraper support plate 292 approaches the upper horizontal frame 26, the locking pin 42
After the tip of 2 is pushed in by the inclined guide surface 416,
When the locking pin 422 reaches the locking groove 414, it is automatically locked by being protruded into the locking groove 414. When the locking pin 422 is pulled out of the locking groove 414 by the operator, the locking pin 422 is engaged. The lock with the stop groove 414 is released, and the scraper support plate 292 is moved to the plate making 36 or the frame 1.
4 can be freely moved.

When the interconnection between the squeegee support plate 290 and the scraper support plate 292 by the plate connecting device 306 is released, the scraper support plate 2
A push-up cylinder 430 that pushes up the push-up cylinder 92 and separates it by a predetermined distance or more is fixed, and the output rod 43 of the push-up cylinder 430
A contact plate 434 to which the front ends of the two are brought into contact is fixed. The push-up cylinder 430 can be switched between a state in which the output rod 432 is retracted and a state in which the output rod 432 is extended in response to the operation of a changeover switch 436 provided on the squeegee support plate 290.

According to the locking device 410, prior to cleaning the paste, when the squeegee supporting plate 290 is driven to advance diagonally upward and the scraper supporting plate 292 is pushed up to the locking position, the scraper supporting plate 292 is moved. Are automatically locked, so that a fixing operation for preventing the scraper support plate 292 from dropping is unnecessary. Also, as described above, the scraper support plate 29
If the squeegee support plate 290 is driven backward in a diagonally downward direction after the lock of the squeegee support plate 290 with the locking device 410, the squeegee support plate 290 and the scraper support plate 292 are easily separated from each other. Further, by pushing out the scraper support plate 292 by the push-up cylinder 410, the scraper support plate 292 can be easily separated from the squeegee support plate 290, and by the shock absorbing action of the push-up cylinder 410 operated by air, the scraper support plate 292 can be released. 292 is the locking device 41
There is an advantage that the shock when it is brought into contact with zero is reduced.

The screen printing apparatus 10 configured as described above is controlled by, for example, a control device shown in FIG. In the figure, the electronic control unit 44
Reference numeral 0 denotes a so-called microcomputer including a CPU, a ROM, a RAM, an input / output interface, and the like.
U processes an input signal according to a program stored in the ROM in advance, and operates a solenoid valve 442 for operating the cylinder 52 for vertically moving the conveying roller, an electromagnetic valve 444 for operating the contact plate driving cylinder 64, and a slide cylinder 72. 446, an electromagnetic valve 448 for operating the clamp cylinder 86, an X-direction pulse motor 190 for driving the moving plate 146 in the X direction, and a moving plate 146 for driving in the Y or θ direction. First for
First Y-direction pulse motor 4 of Y-direction position moving device 182
50, the second Y-direction pulse motor 452 of the second Y-direction position moving device 184, the solenoid valve 453 for operating the fixed cylinder 226 of the lock device 220, and the carrier base 1
Drive motor 128 for driving substrate 10 between substrate replacement position L and print position R, upper and lower table drive cylinder 11
6, an electromagnetic valve 456 for operating the insertion pin driving cylinder 254, a squeegee 3
20, a solenoid valve 458 for operating the squeegee vertical cylinder 322, a solenoid valve 460 for operating the intermediate height position stopper cylinder 324, and a solenoid valve 462 for operating the push-up cylinder 430. The solenoid valve 464 for operating the cylinder 282 that moves the squeegee driving device 12 toward and away from the plate making 36 is controlled.

The console box 466 has a manual automatic switch 468 for switching between a manual mode in which each actuator is independently operated manually and an automatic mode in which each actuator is automatically operated, and starts automatic screen printing. The print start / stop switch 470 for turning on / off, the transport roller up / down switch 472 for switching the transport roller 54 between the raised position and the lowered position, and the plate making 36 lifted by separating the contact plate 62 from the backup member 78 Plate drive switch 474 for switching between a state where the contact plate 62 is moved to the backup member 78 side and a state where the contact plate 62 is moved to the backup member 78 side.
Plate gap gauge slide switch 476 for switching the position between the plate making 36 and the backup member 78 and the position not to be inserted, the clamp switch 478 for fixing the plate making 36 to the frame 14, the moving plate 1
X-direction switch 48 for driving operation of 46 in the X-direction
0, a first Y-direction switch 482 and a second Y-direction switch 484 for driving and operating the moving plate 146 in the Y direction or the θ direction, and a moving plate lock switch for operating the lock device 220 for simply fixing the moving plate 146. 485, a table drive switch 486 for driving the carrier main body 110 between the board replacement position L and the printing position R, a table up / down switch 488 for moving the up / down table 114 up and down, an insertion pin 252, ie, a fitting pin. A positioning switch 490 for driving the device 248, a squeegee drive switch 492 for driving the squeegee 320 to move forward and backward along the screen 40, and a squeegee up / down switch 4 for moving the squeegee 320 up and down.
94, an intermediate height switch 496 for raising the squeegee 320 to the intermediate height at its forward limit, and a squeegee driving device up / down switch 498 for moving the squeegee driving device 12 toward and away from the plate making 36 are provided, respectively. Operation signals generated from these switches are supplied to the electronic control unit 440. An operation signal of the changeover switch 436 for operating the push-up cylinder 430 is also supplied to the electronic control unit 440.

When the manual mode is selected by operating the manual automatic changeover switch 468, the transport roller up / down switch 472, the contact plate drive switch 474,
Plate gap gauge slide switch 476, clamp switch 478, X direction switch 480, first Y direction switch 482 and second Y direction switch 484, moving plate lock switch 485, table drive switch 486,
Table up / down switch 488, positioning switch 49
0, the operation of manual switches such as the squeegee drive switch 492, the squeegee up / down switch 494, the intermediate height switch 496, the squeegee drive up / down switch 498, and the changeover switch 436 are enabled, and the operation corresponding to those switches is performed independently Will be

For example, when replacing the plate making machine 36, after the manual mode is selected by operating the manual automatic changeover switch 468, the clamp by the clamp cylinder 86 is released by operating the clamp switch 478, and the contact plate drive switch 474 is operated. After the plate making 36 is pushed up to the squeegee driving device 12 side by the operation and is raised to the position where the plate distance gauge 66 is not inserted by the operation of the plate distance gauge slide switch 476, the contact plate driving switch 474 is again operated to make the contact. The contact plate 62 is pulled toward the backup member 78 and is lowered until the plate making 36 contacts the first guide plate 46. In this state, when the transport roller 54 is raised by operating the transport roller up / down switch 472, the plate making 36 used so far can be moved lightly by the transport roller 54 and the spherical rotating body 50, and screen printing is performed. It is pulled out of the device 10. Conversely, a new plate making 36 is lightly inserted to a predetermined mounting position by the transport roller 54 and the spherical rotating body 50, and the transport roller 54 is lowered by operating the transport roller up / down switch 472. At this time,
When the plate interval zero check is performed in advance, the clamp cylinder 86 is clamped by operating the clamp switch 478, and the plate making 36 is pressed between the pressing pad 80 of the clamp cylinder 86 and the contact plate 62. . At this time, since the plate interval gauge 66 is not inserted,
By operating the table up / down switch 488, the up / down table 114 on which the substrate 42 is placed is raised, thereby confirming that the plate interval D1 between the screen 40 and the substrate 42 is zero. Next, the clamp by the clamp cylinder 86 is released by operating the clamp switch 478,
After the plate making 36 is pushed up to the squeegee driving device 12 side by the operation of the contact plate drive switch 474 and lowered to the position where the plate gap gauge 66 is inserted by the operation of the plate gap gauge slide switch 476, the contact plate is again turned on. The contact plate 62 is pulled in by the operation of the drive switch 474, and is clamped by the clamp cylinder 86 by the operation of the clamp switch 478.
Is fixed, the plate interval D corresponding to the plate interval gauge 66 is
1 is formed. The plate gap gauge 66 may be moved as needed while the gauge holding member 76 is raised by operating the plate gap gauge slide switch 476.
It is replaced with a new one suitable for plate making 36.

When the paste is replaced, after the manual mode is selected by operating the manual automatic changeover switch 468, the connection between the squeegee support plate 290 and the scraper support plate 292 is released by the plate connecting device 306, and the switching is performed. By operating the switch 436, the scraper support plate 292 is pushed up by a predetermined distance from the squeegee support plate 290 by the output rod 432 of the push-up cylinder 430. In this state, the squeegee support plate 290 is advanced by operating the squeegee drive switch 492, and When the 292 is driven to its highest (locked) position, the locking device 410 automatically locks the scraper support plate 292 at that position. When the squeegee support plate 290 is moved backward by the operation of the squeegee drive switch 492, the space between the scraper support plate 292 and the squeegee support plate 290 is greatly opened, and the squeegee 320, the scraper 368 and the screen 40 can be easily cleaned. Done in When the cleaning operation is completed, the squeegee support plate 290 is advanced by operating the squeegee drive switch 492 again, and the locking state of the scraper support plate 292 is changed by pulling out the locking pin 422 of the locking device 410. The connection pin 312 of the plate connection device 306 is operated while the output rod 432 of the push-up cylinder 430 is retracted by the operation of the changeover switch 436 by being released and received by the output rod 432 of the push-up cylinder 430, and the scraper support plate 292 is operated. Are connected to the squeegee support plate 290.

However, when the automatic mode is selected by operating the manual automatic changeover switch 468, the operation of the manual switch is invalidated, and the screen printing is performed in response to the operation of the print start / stop switch 470. It runs automatically. That is, when a new substrate 42 is placed on the moving plate 146 of the substrate carrier 104 located at the substrate replacement position L by a handling device (not shown), a pair of positions attached to the substrate 42 The mark is detected by the alignment substrate position detecting device 13, and the alignment operation is performed. That is, the X-direction position moving device 180, the first Y-direction position moving device 182, and the second Y-direction position moving device 184 are operated so that the pair of position marks automatically match the preset positions. Next, the substrate transfer table 104 is driven by the drive motor 128.
After being driven to the printing position R by the
Is brought closer to the plate making 36 side, and the plate making 36 fixed to the frame 14 and the substrate 42 placed on the upper and lower tables 114 are mutually reciprocated by expanding the diameter expanding pins 250 of the fitting pin device 248. Positioned. At this time, the squeegee 320 at the intermediate height position in the forward (up) position is raised to its upper limit position and at the same time is lowered to the position where the scraper 368 contacts the screen 40. In this state, the squeegee 320 and the scraper 368 Is moved backward to a backward (down) position, then the squeegee 320 is moved down to a position where the screen 40 is pressed, and the scraper 368 is raised. The image is transferred onto the substrate 42 in a predetermined pattern. Then, the squeegee 320 is positioned at the intermediate position, and
Is lowered in the direction away from the screen 40, the substrate transport table 104 is driven by the drive motor 128 to the substrate replacement position L, where the printed substrate 42 is replaced by a new substrate 42 by the handling device.

At the time of the alignment operation, the electronic control unit 440 changes the position of the X-direction drive pin 148 in the X-direction to position the substrate 42 in the X-direction with respect to the plate making 36, and the first Y-direction drive pin 152 and the second Y-direction
By changing the Y direction position of the direction drive pin 154 by the same amount, the Y direction position of the substrate 42 with respect to the plate making 36 is determined, and the Y direction position of the first Y direction drive pin 152 and the second Y direction drive pin 154 is changed by a different amount. The function as a positioning control device that positions the rotational position θ of the substrate 42 with respect to the plate making 36 by changing it. Thereby, an X-direction guide device for guiding the X-direction table,
X direction table feed screw mechanism for feeding X direction table, Y
Moves without using a Y-direction guide device that guides the direction table, a Y-direction feed screw mechanism that sends the Y-direction table, a rotation direction guide device that guides the table in the rotation direction, and a rotation direction drive device that rotates the table in the rotation direction. The adjustment of the X-direction position, the Y-direction position, and the rotation angle position θ of the plate is performed.

The electronic control device 440 supplies the compressed gas from the compressed gas supply device 172 to the second upper and lower base plates 144 by switching the switching control valve 168 during the moving period of the moving plate 146 during the alignment operation. To form a compressed gas layer between the moving plate 146 and the second upper and lower base plates 144 supporting the moving plate 146, and the X-direction driving pin 1 driven according to an electric signal.
48, the first Y-direction drive pin 152 and the second Y-direction drive pin 154 allow the moving plate 146 to be moved with an extremely small force. From the negative pressure supply device 170 to the second upper and lower base plates 1
A negative pressure is supplied to the base plate 44 to adsorb the moving plate 146 on the second upper and lower base plates 144 and fix it. Thus, the X-direction drive pin 148 and the first Y-direction drive pin 15
2. There is an advantage that the driving mechanism and the fixing mechanism of the second Y-direction driving pin 154 are extremely small.

While the embodiment of the present invention has been described with reference to the drawings, the present invention can be applied to other embodiments.

For example, in the screen printing apparatus 10 according to the above-described embodiment, the plate 1
Although it is fixed to 4, it may be of a type fixed in a horizontal state. Even in this case, the same effect as in the above-described embodiment can be obtained.

In the screen printing apparatus 10 of the above-described embodiment, the squeegee support plate 290 is
28, the scraper support plate 29
2 is driven by the squeegee support plate 290, but the scraper support plate 292 may be driven back and forth, and the squeegee support plate 290 may be driven by the reciprocal drive.

In the screen printing apparatus 10 according to the above-described embodiment, the squeegee support plate 290 and the scraper support plate 292 and the rectangular frame 284 for supporting the same are provided.
However, the cylinder 282 is configured to be separated from the plate making 36, but the cylinder 282 does not necessarily have to be provided.

In the above-described embodiment, the drive motor 300, the squeegee vertical cylinder 322, the scraper vertical cylinder 370, and the like are used as the actuator or the drive source. However, other types such as a linear motor, a hydraulic cylinder, and an electromagnetic solenoid are used. May be used.

The above is merely an embodiment of the present invention, and the present invention can be variously modified without departing from the gist thereof.

[Brief description of the drawings]

FIG. 1 is a side view of a screen printing apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of the printing apparatus of FIG. 1, excluding an alignment device, a squeegee driving device, a substrate transfer device, and the like for explaining a frame.

FIG. 3 is a view showing the plate making and holding apparatus of FIG. 2 in detail, and is a cross-sectional view of the embodiment taken along line III-III.

FIG. 4 is a plan view showing the plate making and holding apparatus shown in FIG. 2;

FIG. 5 is a front view showing the plate making and holding apparatus shown in FIG. 2;

FIG. 6 is a front view illustrating an upper and lower table included in the substrate transfer table of FIG. 1;

FIG. 7 is a bottom view showing the upper and lower tables of FIG. 6;

FIG. 8 is a side view showing the upper and lower tables of FIG. 8;

FIG. 9 is a front view of the upper and lower tables showing a state where a moving plate is removed in FIG. 6;

FIG. 10 is a front view of the upper and lower tables showing a state where the moving plate and the second upper and lower plates are removed in FIG. 6;

11 is a side view showing the X-direction position moving device of FIG.

FIG. 12 is a plan view showing the X-direction position moving device of FIG. 6;

FIG. 13 is a side view showing the X-direction urging device of FIG. 6;

FIG. 14 is a plan view showing the X-direction urging device of FIG. 6;

FIG. 15 is a front view showing the X-direction urging device of FIG. 6;

FIG. 16 is a sectional view of a principal part for explaining the lock device of FIG. 6;

FIG. 17 is an enlarged view showing first upper and lower plates of an upper and lower table included in the substrate transfer table of FIG. 1;

18 is an enlarged view for explaining the shapes of the diameter-enlarging pin and the insertion pin of FIG. 17;

FIG. 19 is an enlarged front view illustrating the shape of the diameter-enlarging pin of FIG. 17;

FIG. 20 is a view for explaining another example of the block and the stopper member of FIG. 17;

FIG. 21 is a front view illustrating the squeegee driving device of FIG. 1;

FIG. 22 is an enlarged view showing a main part of the squeegee support plate and the scraper support plate of FIG. 21.

FIG. 23 is a side view showing an enlarged main part of the squeegee support plate of FIG. 21 with a part cut away.

FIG. 24 is a cross-sectional view of a main part illustrating a plate connecting device, a locking device, a squeegee, a scraper, and the like provided on the squeegee support plate and the scraper support plate in FIG. 21;

25 is a diagram showing a squeegee-side coupling and a scraper-side coupling for detachably connecting the pneumatic pipe of FIG. 21.

FIG. 26 is a block diagram illustrating a configuration of a control device provided in the screen printing apparatus of FIG. 1;

[Explanation of symbols]

10: screen printing device 26: upper horizontal frame, 28: lower horizontal frame (plate making fixed frame) 36: plate making 40: screen 290: squeegee support plate (first reciprocating member) 292: scraper support plate (second reciprocating member) 306: plate connecting device (reciprocating member connecting device) 320: squeegee 322: squeegee vertical cylinder 368: scraper 370: scraper vertical cylinder 396, 398: pneumatic piping (pressure piping) 410: locking device 430: push-up cylinder

Claims (4)

[Claims] 1. A screen printing apparatus of a type in which a squeegee pushes a paste on a screen for plate making in one direction, and a scraper pushes back the paste moved in one direction by the squeegee in the other direction. A squeegee is provided so as to be able to abut on and separate from the screen of the plate making, a first reciprocating member that is reciprocated along the plate making at a position separated from the screen of the plate making by a predetermined distance, and A second reciprocating member that is provided so as to be able to abut on and separate from the plate making screen and is reciprocated along the plate making at a position separated from the plate making screen by a predetermined distance; Moving the second reciprocating member to the first reciprocating position so as to reciprocate the member together with the first reciprocating member. A screen printing apparatus comprising: a reciprocating member connecting device detachably connected to a member. 2. A squeegee vertical cylinder provided on the first reciprocating member, for driving the squeegee to a position where the squeegee can abut on the screen of the plate making and a position separated from the screen, and the second reciprocating member. Provided, when the squeegee is at a position separated from the screen, the scraper is in a position where it can contact the screen of the plate making,
A scraper vertical cylinder for positioning the scraper at a position separated from the screen when the squeegee is in contact with the screen; and a first reciprocating member and a second reciprocating member provided on the first reciprocating member. In a state where the reciprocating member and the second reciprocating member are connected to each other, the pressure chamber of the squeegee vertical cylinder and the pressure chamber of the scraper vertical cylinder communicate with each other. The screen printing apparatus according to claim 1, further comprising a pressure pipe for opening communication between a pressure chamber of the squeegee vertical cylinder and a pressure chamber of the scraper vertical cylinder when the reciprocating member is separated from the reciprocating member. . 3. A plate making fixing frame for fixing the plate making in a state where its screen is inclined, a second reciprocating member provided between a fixing member integral with the plate making fixing frame and the second reciprocating member. And a locking device that automatically engages when the moving member is pushed up by the first reciprocating member and reaches the fixed position, and locks the second reciprocating member at the fixed position. 1 or 2 screen printing device. 4. A push-up cylinder provided on the first reciprocating member and for lifting the second reciprocating member to be separated by a predetermined distance or more when the connection by the reciprocating member connecting device is released. Item 3. The screen printing device according to Item 3.