JP3523610B2 - Screen printer and screen release machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen printing machine and a plate separating device. In particular, the present invention relates to a screen printing machine and a plate separating device in which a screen moves.

[0002]

2. Description of the Related Art Conventional Example 1. FIG. 16 is a schematic view of a conventional screen printing machine. FIG. 17 is a front view of the screen printing machine. FIG. 18 is a plan view of the screen printing machine.

The screen printing machine 101 has a base 102. The base 102 includes a table 103 and a printing unit 1.
It is equipped with 09. The table 103 is attached so as to be movable in the directions of arrows K1 and K2 along the base 102. The table 103 mounts a work 110 (for example, a substrate), and moves the work 110 to the printing unit 109. The printing unit 109 prints on the work 110. The operation box 105 is provided on the side surface of the base 102 and has various switches 106 used by an operator. The base 102 further includes a camera 190. An image of the work 110 placed on the table 103 is imaged by the camera 190, and the work is accurately aligned. The table 103 is a table that can perform alignment in the three-dimensional directions of X, Y, and θ. Printing section 10
In 9, the screen engraving 200 is the printer base 108.
Is attached to. The screen engraving 200 includes a screen frame 211 and a screen mesh 201 having a print image. The stroke portion 116 is movably attached to the printer base 108. The printer base 108 controls the movement of the stroke part 116, and the squeegee 111 controls the screen mesh 20.
While applying a printing pressure suitable for screen printing to No. 1, it is controlled to move in the directions of arrows C1 and C2 along the surface of the screen mesh 201 at a speed suitable for screen printing.

Conventional example 2. Further, according to Japanese Utility Model Laid-Open No. 2-10030, a guide mechanism that holds a screen frame in a holding frame and slidably guides the holding frame between a print position and a take-out position while holding the screen frame, There is disclosed a screen printing machine including a holding mechanism that holds a holding frame on a base of the screen printing machine at a printing position and has a holding member that is released from the holding state to a held state. The guide mechanism is composed of guide rails formed on both sides of the holding frame and having upper and lower edge portions, and a pair of guide rollers rollingly contacting the upper and lower edge portions of the guide rail attached to the base. Further, the holding mechanism includes a turning holding piece rotatably attached to the base,
It is composed of a rotary holding piece and a plunger fixed to the base. The rotation holding piece engages with a locking piece formed on the holding frame to fix the holding frame.

[0005]

The screen printing machine of Conventional Example 1 has a structure in which the screen is fixed and the table moves. Since the table moves, the width of the screen printing machine becomes large in the moving direction of the table, which causes a problem that the plane area of the screen printing machine becomes large. Further, since the screen is fixed, it is difficult to clean the back side of the screen (hereinafter, referred to as back wiping) between screen printings. When manually wiping the back side, there is not enough space to wipe the back side of the screen, and since the back side of the screen faces downward,
There was a problem that it was difficult to clean. Alternatively, even when the back wiping is performed by a special device, the back wiping device has to be moved between the screen and the base, so that the back wiping device has a complicated structure. However, there is a problem that the manufacturing cost of the back wiping device becomes high.

In the screen printing machine of Conventional Example 2, a holding frame holding the screen is guided by a guide mechanism with respect to the base of the screen printing machine, and at least a part of the screen is removed from the printing position. By sliding, the screen can be easily attached and detached, the screen can be printed easily in a short time, and the operating rate of the screen printing machine is improved. However, the operator manually moves the screen from the print position to the take-out position. Further, the operator also manually moves from the take-out position to the printing position. Further, the operator manually switches between the holding state and the held state of the screen by the holding mechanism.
Also, clean the screen after removing it.
This is done manually by the operator. Also,
When the screen is slid, there is a problem that the plate separating mechanism for rotating the screen to separate the plate cannot be used.

An object of the present invention is to obtain a screen printing machine having both a mechanism for slidingly moving a screen and a plate separating mechanism.

[0008]

A screen printing machine according to the present invention is a screen printing machine having a screen moving section for moving the screen, wherein movement of the screen by the screen moving section is a screen for wiping the back of the screen. It is characterized in that it is used both for changing the installation position of and for changing the screen installation position depending on the screen size.

The screen printing machine comprises a printing section for screen printing and a back wiping section for back wiping the back surface of the screen. The screen moving section has a screen mounting section for mounting a screen printing plate, a printing section and a back side. A rail that extends between the wiping unit, a drive unit that moves the screen mounting unit in the forward and reverse directions between the printing unit and the back wiping unit according to the rail, and a screen mounting unit that matches the screen size in the printing unit. And a positioning part for positioning the position.

The positioning section includes a plurality of stoppers provided at a plurality of positions corresponding to a screen size which is a stop position of the screen mounting section when the screen mounting section is moved toward the printing section, and a plurality of stoppers. And a positioning cylinder that positions the screen attachment portion by contacting any one of the stoppers.

The screen mounting portion includes a slide frame that slides on the rail, and a screen rotating frame that is rotatably attached to the slide frame via a rotating shaft and that mounts a screen printing plate. .

In the screen printing machine, the mounting position can be changed in the same direction as the moving direction of the screen.
In addition, it is characterized in that a rotation drive unit for transmitting a driving force for rotating the screen rotation frame to the screen rotation frame is provided.

A plate separating device for a screen printing machine according to the present invention is a plate separating device for a screen printing machine for performing screen printing while separating a screen from a work. And a rotation drive section for rotating about a rotation axis, wherein the rotation drive section slides a position for transmitting a driving force for rotating the screen plate making to the screen plate making in a screen printing direction of the screen printing machine. Is characterized by.

The rotation drive section is characterized in that it transmits a driving force for rotating the screen plate making to the screen plate making within the range of the screen making plate frame.

A plate separating device for a screen printing machine according to the present invention is a plate separating device for a screen printing machine for performing screen printing while separating a screen from a work. It is characterized in that it is provided with a rotation drive section that rotates about a rotation axis, and the position of the rotation axis and the position of the rotation drive section can be adjusted according to the size of the screen plate making.

A plate separating device for a screen printing machine according to the present invention is a plate separating device for a screen printing machine for performing screen printing while separating a screen from a work. A rotary drive unit for rotating the rotary shaft as a center, and the position of the rotary shaft and the position of the rotary drive unit are arranged at both ends of the screen surface of the screen printing plate or inside thereof. Is characterized by.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments 1 to 5 described below are the same as the embodiments shown in Japanese Patent Laid-Open No. 11-5294. Since the contents of the first to fifth embodiments are the premise of the sixth embodiment described later, the first to fifth embodiments of Japanese Patent Laid-Open No. 11-5294 are cited here as they are.

Embodiment 1. FIG. 1 is a diagram showing a configuration of a lower portion of a printing unit 109 of the screen printing machine according to the present invention. The configuration of the upper part of the printing unit 109 will be described later with reference to FIG. FIG. 1 shows an internal configuration excluding the printer base 108. In FIG. 1, the racks 703, 70
4 and the gear 70 that engages with the racks 703 and 704.
5,706 are provided. The gears 705 and 706 are
Gears having the same diameter and the same number of teeth are fixed to the drive shaft 700. Therefore, when the gear 705 rotates, the gear 7
06 also rotates by the same angle in synchronization. Rack 703
Reference numeral 704 denotes a flat tooth rack, a straight rack or a helical rack fixed to both ends of the printer base 108 (not shown) so as to be parallel to the screen printing direction, and is engaged with the teeth of the gears 705 and 706. It is a mating tooth, and a plurality of teeth of the same shape carved at equal intervals are carved. Motor 7
The rotation of 10 rotates the drive shaft 700 including the drive shaft engaging portion 711, and the gear 705 rotates in the directions of arrows E1 and E2. In synchronization with the rotation of the gear 705 in the directions of the arrows E1 and E2, the gear 706 also rotates by the same angle in the directions of the arrows F1 and F2. The rotation of the gears 705 and 706 causes the drive shaft 700 to move the racks 703 and 704 at an equal distance by the arrow C.
Move only in the C1 direction. The drive shaft 700 is rotatably attached to the drive plate 730 by a drive bearing 731. The driving plate 730 has a screen mounting portion 740.
Is movably attached (the details will be described later with reference to FIG. 7). The rotation of the drive shaft 700 causes the drive shaft 70 to rotate.
When 0 moves in the directions of arrows C1 and C2, drive plate 730
Also moves in the directions of arrows C1 and C2. With the move,
The screen mounting portion 740 also moves in the directions of arrows C1 and C2. This movement is guided by rails 701 and 702 and sliders 707 and 708. As a result, the screen mounting portion 740 obtains driving force from both sides of the left portion L and the right portion R at the same time, and moves in the directions of arrows C1 and C2. In this way, the screen is smooth and
It becomes possible to move accurately. In this way, since the driving force is applied from both the left and right sides at the same time, the movement of the screen mounting portion 740 can be smoothly performed without moving to the left and right. Further, the movement of the screen mounting portion 740 is performed by the rail 70.
Since it is guided by the sliders 1, 702 and the sliders 707, 708, it can be performed smoothly without further blurring to the left and right.

The table 103 is a table that can be positioned in the X, Y, and θ directions. The table 103 is a table that can be moved in the directions of arrows B1 and B2, that is, in the vertical direction. The table 103 is
It does not move in the directions of arrows C1 and C2 or the directions of arrows D1 and D2, and is fixed to the base. The table 103 is
Roller 781 for moving the work in the directions of arrows D1 and D2
have. The roller 781 can be rotated by a motor (not shown). The work is loaded from the direction of arrow D1 and the table 10 is rotated by the rotation of the roller 781.
3 is moved to the upper position and provisionally positioned. After this temporary positioning, the roller 781 descends in the direction of arrow B1 so as not to interfere with printing. After printing, the roller 781 moves up in the arrow B1 direction and is rotated by a motor (not shown) to carry out the work in the arrow D1 direction or the arrow D2 direction.

When the work is provisionally positioned on the table 103, four camera unit sections 750 (only two shown in the figure) operate to pick up the positioning marks printed in advance on the work. Camera unit section 750
Attaches a camera 755 so as to be movable in a two-dimensional direction. The camera 755 is movable in the directions of arrows D1 and D2 by a motor 753 and an arm 754. The arm 754 and the motor 753 can be moved in the directions of arrows C1 and C2 by the motor 751 and the arm rail 752. The arm rail 752 is fixed to the printer base 108 (not shown). Camera unit 75
Four 0s are provided, the positioning marks printed at the four corners of the work are imaged, and the table 103 is moved to X, Y,
By moving in the θ direction, the work is accurately positioned. Note that the camera unit section 750 does not have to be provided in four pieces, and may be two pieces or any other number.

After the work is positioned, the camera unit section 750 moves the camera 755 (arm 754) in the directions of arrows C1 and C2, and the arrow B1 of the table 103.
Move it within the range that does not interfere with the movement in the direction. The table 103 raises the work in the direction of arrow B1 to perform printing. After printing, the table 103 lowers the work in the direction of arrow B2 and carries out the work. Camera unit 75
The work positioning operation based on 0 is performed every time the table 103 carries the work, that is, immediately before printing is performed on the work. After the positioning by the camera unit section 750, the table 10 is physically operated.
It is only a rise of 3. Therefore, the camera unit section 750
As a result, accurate printing can be performed on the workpiece positioned in the X, Y, and θ directions.

The screen mounting portion 740 is mounted so as to be slidable in a self-propelled manner, but is fixed to the upper part of the table 103 when performing screen printing.
When the screen mounting portion 740 slides, it is a case of wiping the back of the screen. Back wiping device 760
Operates when the screen mounting portion 740 is moved in the arrow C1 and / or C2 directions. The back wiping device 760 performs the back wiping of the screen by adhering the adhesive film 762 to the back surface of the screen via the roller 761. The roller 761 is movable in the directions of arrows B1 and B2 with respect to the post 764, and the adhesive film is raised in the direction of arrow B1 when back wiping and presses the adhesive film 762 against the back surface of the screen. . The winding unit 763 is rotated by the motor 765 and winds the adhesive film 762. The back wiping by the back wiping device 760 is repeated several times as necessary. In that case, the screen attachment part 740 is automatically moved continuously in the directions of the arrows C1 and C2 by the required number of times. Since the screen is configured to slide, the back wiping device 760 can be optionally attached to the screen printing machine. Further, it is only necessary to move the roller up and down, which is the minimum movement, and the configuration of the back wiping device 760 becomes very simple.

FIG. 2 is a diagram showing the configuration of the upper portion of the printing unit 109 of the screen printing machine of the present invention. FIG. 2 shows an internal configuration excluding the printer base 108. FIG. 2 is a diagram showing a configuration in which the stroke portion 116 is moved and the stroke portion 116 is rotated in the directions of arrows A1 and A2. By rotating the stroke portion 116 around the fulcrum shaft 400, the squeegee 111 and the scraper 311 can be easily attached or detached.

FIG. 3 shows the stroke portion 116 shown in FIG.
FIG. The squeegee 111 is a squeegee holder 1.
It is held at 20. Also, the scraper 311 is
It is held by the scraper holder 320. In addition, an squeegee holder 12 is provided by an air cylinder (not shown).
0 and the scraper holder 320 include the stroke part 116.
It is attached so that it can move up and down. The stroke portion 116 has an arrow A1 about the fulcrum shaft 400.
It can rotate in the A2 direction. Stroke part 116
Is rotated in the direction of arrow A1, the squeegee 1
11 and the scraper 311 can be easily attached to and detached from the squeegee holder 120 and the scraper holder 320. In the screen printing machine having such a configuration, the stroke portion 116 is formed by using the fulcrum shaft 400.
Will be moved in the directions of arrows C1 and C2.

Further, in FIG. 2, the racks 403, 404,
And gears 405, 4 that engage with the racks 403, 404.
06 is provided. The gears 405 and 406 have the same diameter,
These gears have the same number of teeth and are fixed to the fulcrum shaft 400.
Therefore, when the gear 405 rotates, the gear 406 also rotates synchronously by the same angle. Rack 403, 404
On both ends of the printer base 108 (not shown),
A flat tooth rack or a straight rack or a helical rack fixed so as to be parallel to the screen printing direction, the teeth engaging with the teeth of the gears 405 and 406, and having the same shape carved at equal intervals. Multiple teeth are engraved. Slide shaft 409
The rotation of causes the slider 407 having the slide shaft engaging portion 411 to move in the directions of arrows C1 and C2. With this movement, the gear 405 rotates in the directions of arrows E1 and E2. In synchronization with the rotation of the gear 405 in the directions of the arrows E1 and E2, the gear 406 also rotates in the directions of the arrows F1 and F2 by the same angle.
The rotation of the gears 405 and 406 causes the fulcrum shaft 400 to move the racks 403 and 404 at equal distances in the directions of the arrows C1 and C2. This movement is guided by rails 401 and 402 and sliders 407 and 408. As a result, the stroke part 116 obtains driving force from both sides of the left part L and the right part R at the same time, and moves in the directions of arrows C1 and C2.
In this way, the stroke portion 116 can be moved smoothly and accurately. In this way, since the driving force is applied from both the left and right sides at the same time, the movement of the stroke portion 116 is smoothly performed without the lateral movement.

FIG. 4 is a detailed front view (partially sectional view) of the configuration shown in FIGS. 1 and 2 as seen from the Y direction. FIG. 5 is a detailed side view (partial cross-sectional view) of the configuration shown in FIGS. 1 and 2 as seen from the X direction. FIG. 6 is a detailed plan view (partial cross-sectional view) of the configuration shown in FIGS. 1 and 2 as seen from the Z direction.

The screen printing machine, when viewed from the front,
There are printer bases 108 on both sides and the bottom. The table 103 is provided at the center of the printer base 108.
Exists. The table 103 can be moved up and down in the directions of arrows B1 and B2 by the rotation of the motor 791.
The belt 793 rotates the motor 791 to rotate the ball screw 7
It is transmitted to 92 and the table 103 can be moved up and down. The table 103 can position the table surface in the three-dimensional direction regardless of the vertical movement of the table by a moving mechanism (not shown) in the X, Y, and θ directions.
Printer base 1 when table is lowered
A gap S is created between 08 and the table surface. The gap S is a gap that penetrates the printer base in the horizontal direction. Therefore, the work 110 can be carried in from the direction of the arrow S1 through the gap S and can be carried out in the direction of the arrow S2. The size of the gap S has a length equal to or larger than the thickness of the work 110. In this way, the table 103 is
There is no need to move the work 110 in and out. Therefore, the width W seen from the front of the screen printing machine can be reduced. The printer base 108 has a camera unit section 750 attached to the upper portion of the gap S.
On the upper part of the camera unit section 750, a screen mounting section 740 and a screen printing plate 200 are slidably provided. Further, on the upper part thereof, the stroke portion 1
16 is provided slidably. When printing, the table 103 positions the work 110 accurately by the camera unit section 750, and then raises the work 110. At that time, the camera unit is mounted on the table 1
The camera and arm are retracted so as not to hinder the ascent of 03.

The rail 4 is attached to the printer base 108.
01, 402, 701, 702, racks 403, 40
4, 703 and 704 are fixed. Rail 401,
402, 701, 702 with respect to sliders 407, 4
08, 707 and 708 are slidably attached. The fulcrum shaft 400 is rotatably attached to the sliders 407 and 408 via slider bearings 413 and 414. The stroke part 116 is rotatably attached to the fulcrum shaft 400 via the stroke part bearings 415 and 416. This rotation is automatically performed by the cylinders 451 and 452. The fulcrum 455 of the cylinder 452 is attached to the slider bearing 413, and the fulcrum 456 is attached to the stroke portion 116.

The slide shaft engaging portion 411 is the slide shaft 4
It engages with 09 to change the rotational movement of the slide shaft 409 into a linear movement. A rotary liner can be used as an example of the slide shaft engaging portion 411. The slide shaft engaging portion 411 is fixed to the slider 407. Therefore, the linear motion of the slide shaft engaging portion 411 is transmitted to the slider 407, the linear motion of the slider 407 is transmitted to the fulcrum shaft 400, and the gears 405 and 406 are further rotated. The mounting position of the slide shaft engaging portion 411 is
It is directly above the rail 401, and the movement of the slide shaft engaging portion 411 can be directly guided by the rail 401. Gears 405, 406, 705, 706
Is at both ends of the fulcrum shaft 400 and the drive shaft 700, and is outside the rails 401, 402, 701, 702. In this way, the gear 4 that generates the driving force
Since 05, 406, 705, and 706 are at the outermost end, the stroke portion 116 and the screen mounting portion 740
Can be moved more smoothly.

FIG. 7 is a diagram showing details of the drive plate 730 and the screen mounting portion 740. The drive plate 730 is provided with brackets 732 at both ends in the direction in which the screen mounting portion 740 slides. On the other hand, the screen mounting portion 740 includes a slide block 742. The bracket 732 and the slide block 742 are connected by a guide shaft 748. Slide block 74
2 is a coil spring 747,74 with respect to the guide shaft 748.
The drive plate 730 is attached by means of 9 so as to be movable in both forward and reverse directions. On the other hand, the printer base 108 is provided with a shock absorber 811 and a stop pin 812. The screen mounting portion 740 has an arrow C.
If it moves in one direction, shock absorber 811
Slows down the movement speed and the stop pin 812 accurately positions the screen mount 740. While the stop pin 812 and the screen mounting portion 740 are in contact with each other, the motor 710 continues to move the drive plate 730 in the arrow C1 direction. After the screen mounting portion 740 contacts the stop pin 812, the arrow C
Although it cannot move in one direction, the drive plate 730 is indicated by the arrow C1.
Keep trying to move in the direction. This driving force is absorbed by the coil spring 747 contracting. Then, the driving force absorbed by the coil spring 747 becomes a repulsive force and presses the slide block in the direction of arrow C1. That is, the state in which the screen mounting portion 740 is constantly pressed in the direction of the arrow C1 is maintained and the positioning by the stop pin is accurately performed. The coil spring 749 is a spring that is compressed when the screen attachment portion 740 moves in the arrow C2 direction, and is used in the case of positioning in the arrow C2 direction.

As described above, since the drive plate 730 and the screen mounting portion 740 are movably mounted, a problem may occur when the back wiping is performed while the screen mounting portion is moving. There is.
Therefore, the drive plate 73 is moved during the movement of the screen (during back wiping).
0 and the screen mounting portion 740 need to be fixed.

FIG. 8 is a diagram showing a structure of a fixing portion for fixing the drive plate 730 and the screen mounting portion 740. The fixed piece 851 is fixed to the drive plate 730. On the other hand, in the screen mounting portion 740, cylinders 852 are mounted on both sides of the fixed piece 851. When the screen mounting portion 740 is positioned by the stop pin 812, the cylinder allows the drive plate 730 and the screen mounting portion 740 to move freely without sandwiching the fixing piece, as shown in FIG. Screen attachment part 7
While the 40 is moving, the fixing pieces 851 are sandwiched from both sides by the cylinder 852 to fix the drive plate 730 and the screen mounting portion 740. In this way, the back wiping device 760 can perform the back wiping with the both fixed.

FIG. 9 is a diagram showing a configuration for accurately positioning the screen and the screen mounting portion. The screen mounting portion 740 includes two rod cylinders 86.
1 is fixed. By adjusting the both rod cylinders 861, it is possible to adjust the arrangement position of the screen frame 211 on the screen mounting portion 740.
In this way, the position of the screen can be accurately arranged. After the position adjustment by both rod cylinders 861 is performed, the screen is fixed to the screen mounting portion 740 by the screen fixing portion 745.

FIG. 10 is a diagram showing details of the camera unit section 750. As the motor 751 rotates,
The ball screw 757 rotates to move the arm 754 to the arrow C1,
Move in the C2 direction. Further, as the motor 753 rotates, the ball screw 756 rotates, and the camera 755
Are moved in the directions of arrows D1 and D2. With these structures, the camera 755 can move from position P1 to position P2.
Positioning can be performed freely within the range. The case shown in FIG. 10 shows the case where there are four camera unit sections, but the case of two camera unit sections is also possible.

Returning to FIG. 4, the side wall of the screen printing machine will be described. The screen base 108 includes an upper side surface 901, an inclined side surface 902, and a lower side surface 903. The lower side surface 903 is provided inside the device with respect to the upper side surface 901. By taking such a configuration,
Between the line that carries the work from both sides of the device,
Space can be provided. Even when the line end projects to the screen printing machine side, the lower side surface 903 is recessed inward, so that the line end can be easily arranged. Furthermore, on the side of the screen printing machine,
When a person works, since the lower part of the device is recessed, a footrest can be created, which facilitates the work. For example, when attaching a screen plate having a width of about 2 m to a screen printing machine, the screen plate is attached from the left and right sides to the screen mounting portion 7.
It has to be inserted in 40, but can be used as a scaffold for the operator to lift and insert the screen engraving. Furthermore, when transporting a screen printing machine by truck, etc.,
Even if the maximum width W of the device is larger than the maximum width that can be loaded on the truck, the width T of the lower part of the device is
By making the width smaller than the width that can be loaded on the truck, it can be loaded on the truck.

The feature of this embodiment is that the conventional screen printing machine is designed so that the screen can be moved instead of the idea that it is necessary to fix the screen in order to improve the accuracy of the screen printing. That is the point. Even if the screen is moved, the printing accuracy does not deteriorate as compared with the conventional case. This is because conventionally, the screen is fixed and the table is moved, whereas in the present invention, the screen is movable and the table is fixed. in this way,
Comparing the case where either the screen or the table moves, the present invention is better than the conventional case. This is because with the conventional table moving method, the table must be moved every time a work is printed. On the other hand, in the case of the present invention, it is not necessary to move the screen every time printing is performed on the work. When it is necessary to move the screen during the printing operation, it is necessary to wipe the screen. If the screen is wiped once for every five screen prints,
During five consecutive prints, neither the table nor the screen move. Therefore, the printing accuracy can be improved in the screen moving method of the present invention as compared with the conventional table moving method.

As described above, the screen printing machine shown in Conventional Example 2 moves the screen. However, the present invention does not move the screen manually, but automatically links it with printing. It is designed to be moved. Even if the back wiping is performed manually, the screen is automatically slid after printing a predetermined number of times to create a state in which the back wiping is possible. Further, when the back wiping is automatically performed by the back wiping device, the screen printing and the back wiping are completely automated, and continuous screen printing can be performed without operator intervention. Further, in this embodiment, the table is fixed instead of moving the screen. In the screen printing machine of Conventional Example 2, since both the screen and the table move, the positioning accuracy may decrease, whereas
In the present invention, since the table is fixed, screen printing can be performed without lowering the positioning accuracy even when the screen is movable. Further, even when the screen is moved, it is possible to accurately position the stop plate with the drive plate and the screen mounting portion being movably mounted by the coil spring. As described above, this embodiment has excellent improvements and excellent effects as compared with the screen printing machine described in Conventional Example 2.

The feature of this embodiment is that the camera is arranged at the printing position. Placing the camera in the print position eliminates the need to move the table. The conventional camera is provided outside the printing unit.
Therefore, the place where the workpiece is accurately positioned, that is,
The place where the camera was installed was different from the place where printing was done. Printing was made possible by moving the table between these two places, but in the present invention, the arrangement position of the camera and the printing position are the same. Therefore, there is no need to move the table back and forth, or to move left and right,
The work can be printed by simply moving the table up and down. With the table being lowered, the camera can be moved between the table and the screen for positioning, and screen printing can be performed with the table raised. The movement of the camera to the imaging position or the retreat of the camera is interlocked with the vertical movement of the table, and these operations are interlocked by a control unit (not shown).

Embodiment 2. FIG. 11 is a diagram showing another example of the embodiment. In FIG. 11, FIG. 1 and FIG.
The case where the rails 401, 402, 701, and 702 shown in FIG. Rails 401, 402, 70
When omitting 1,702, as shown in (a),
The gears 405 and 705 may be gears having grooves with a U-shaped cross section. Alternatively, as shown in (b), the rack 40
3, 703 may be a rack having a groove having a U-shaped cross section.

Embodiment 3. As shown in FIG. 12, the motor 410 may be mounted on the stroke portion 116. By directly connecting the rotating shaft of the motor 410 to the fulcrum shaft 400, the driving force of the motor 410 is directly transmitted to the gears 405 and 406, and the stroke portion 116 can move smoothly. The motor 410 has a stroke portion 116.
Is not rotated in the directions of arrows A1 and A2. When it is desired to reduce the weight of the stroke portion 116, the form as shown in FIG. 1 is preferable. However, if there is no effect even if the weight of the stroke portion 116 becomes heavy, the motor 410 is built in the stroke portion 116. It doesn't matter. Further, the motor 710 of FIG. 1 is arranged like the motor 410 shown in FIG. 2, a slide shaft is provided, and the drive plate 73 is provided through the slide shaft.
You may move 0.

Fourth Embodiment In the above-described embodiment, the coil spring is used to move the screen mounting portion 740, but an elastic body such as rubber or an air compression cylinder may be used. Further, an elastic body such as plastic or resin may be used. Further, in the above-described embodiment, the case where the coil springs are provided on both sides has been described, but the coil springs may be provided on only one side if the screen can be accurately positioned only on the screen printing side. Absent.

Embodiment 5. In the above-described embodiment, the case where the screen slides in the screen printing direction has been described, but a case where the screen rotates will be described with reference to FIG. The screen mounting portion 740 is mounted so as to be rotatable around a fulcrum 746. The table 103 moves in the direction of arrow H1. Next, the screen mounting portion 740 rotates in the H2 direction. A back wiper 760 wipes the screen back.
After that, the screen mounting portion 740 is returned in the arrow H3 direction, and the table 103 is returned in the arrow H4 direction. In this way, by rotating the screen mounting portion 740, it is possible to create a state in which the back wiping is easy. Note that manual cleaning may be performed instead of the back wiping device 760. Further, in the case shown in FIG. 13, the case of rotating by 90 degrees is shown, but it may be rotated by a range of 90 degrees or more to 180 degrees. When rotating 90 degrees to 180 degrees, the back side of the screen faces upward,
It becomes easier to clean manually.

FIG. 14 shows a case where the camera unit section 750 is provided above the printing section of the apparatus as an example of arranging the camera unit section 750 at the screen printing position. When the camera unit section 750 is provided above the printing section of the apparatus, the screen engraving 200 and the stroke section 116.
Move to a range that does not interfere with the shooting of the camera. That is, the state shown in FIG. 14A is changed to the state shown in FIG. 14B, accurate positioning is performed by the camera, and then screen printing is performed again in the state shown in FIG. 14A.

FIG. 15 shows a case where the camera unit section 750 is provided inside the table 103 as an example of the case where it is arranged at the screen printing position. Table 10
The table surface of No. 3 is transparent, or an imaging hole is required on the table surface. Further, it is necessary that a positioning mark is printed on the back surface of the work 110. If the above conditions are met, set the camera unit 750 to the table 1
03 can be provided inside. Camera unit section 7
When the table 50 is provided inside the table 103, it is not necessary to move the table 103 and the screen, and the entire apparatus becomes small.

Sixth Embodiment In the sixth embodiment, the points different from the above-described first to fifth embodiments will be described based on the above-described first to fifth embodiments.

In this embodiment, both the change of the installation position of the screen for wiping the back of the screen and the change of the installation position of the screen depending on the screen size are performed by the screens of the first to fifth embodiments. The case where the movement is performed will be described. In addition, in this embodiment, a plate separating device for performing screen printing while separating the screen from the work will be described.
According to the configurations of the first to fifth embodiments described above, since the screen mounting portion 740 slides on the rails 701 and 702, the installation position of the screen mounted on the screen mounting portion 740 is the stop pin 81.
Was determined by 2. That is, even if the size of the screen is changed, the position of the screen cannot be changed because there is only one stop pin 812. Further, since the screen mounting portion 740 slides, the screen mounted on the screen mounting portion 740 cannot perform screen printing while separating the screen, that is, so-called plate separation printing.

FIG. 19 is an exploded perspective view of the screen printing machine according to the sixth embodiment. FIG. 20 is a plan view of the screen printing machine according to the sixth embodiment. In FIG. 19, a characteristic point is that a plurality of stoppers 56 and 57 are provided in the sliding direction of the screen mounting portion 740, and the screen mounting portion 740 is positioned by the stop pins 812 arranged on these stopper 56 and stopper 57. As a result, even if the screen size is changed, the arrangement position of the screen can be changed. That is, even if the screen size changes, the printing range of the printing unit (that is, the printing movement range of the squeegee 111)
Stoppers 56 and 57 are provided at a plurality of positions so that the screen arrangement can be changed according to the screen size so that the center of the screen coincides with the center A of the screen.

As shown in FIG. 19, the screen mounting portion 740 is composed of a screen rotation frame 53 and a slide frame 54. The slide frame 54 slides the rail 701 and the rail 702. The screen rotating frame 53 includes a rotating shaft 83 and a rotating shaft 84 on the slide frame 54.
It is rotatably attached to the slide frame 54 via. The rotating shaft 83 is a screen rotating frame 53.
The bearing 87 and the bearing 85 of the slide frame 54 are inserted. The rotating shaft 84 is inserted into the bearing 88 of the screen rotating frame 53 and the bearing 86 of the slide frame 54. In this way, the screen rotation frame 53 can be rotated around the rotation center C. Pin receiving plates 75 and 76 are provided on the same surface as the screen 201 on both sides of the screen rotating frame 53. Further, the screen rotating frame 53 has angle adjusting pins 66 and 67. The screen engraving 200 is fixed using the screen fixing portion 745. In order to rotate the screen rotating frame 53,
A rotary drive unit 61 and a rotary drive unit 62 are provided on both sides of the base.
Is provided. The rotation drive unit 61 is slidably attached to the slide rail 77. Further, the drive pin 65 is moved in the vertical direction (Z
Direction) is attached so as to be movable. Drive pin 65
Touches the pin receiving plate 75 at the rotation driving point U. When the drive pin 65 projects upward, the pin receiving plate 75 is pushed up, and the screen rotation frame 53 is raised around the rotation center C. The operation of the rotation drive unit 62 is also the same as that of the rotation drive unit 61, and the rotation drive unit 61 and the rotation drive unit 62 perform the same operation in the Z direction at the same position in the Y direction.

FIG. 21 shows a screen plate 20 having a length W1.
The case where 0 is attached before printing is shown. FIG. 22
21 shows a state during printing in which the drive pin 65 of the rotary drive unit 61 is pushed up from the state of FIG. That is, the case is shown in which the screen rotation frame 53 rotates in the R direction around the rotation center C as the rotation drive point U rises. FIG. 23 shows a case where the screen engraving 200 having a length W2 is attached. The length W2 is smaller than the length W1 shown in FIG. In this case, the slide frame 54 is positioned at the position slid to the left so that the center of the length W2 coincides with the center A of the print area. In FIG. 23, the stop pin 812 of the leftmost stopper 57 is shown.
Positioning is performed by abutting the positioning pin 98 of the positioning cylinder 59 against the. Further, the distance that the screen rotation frame 53 and the slide frame 54 (that is, the screen mounting portion 740) move in the direction of the arrow C2 is
(W1-W2) / 2 = L1. On the other hand, the rotation drive unit 6
1 also slides the slide rail 77 in the C1 direction. This sliding distance is the same as L1 (L2
= L1).

In the sixth embodiment, by utilizing the movement of the screen to the back wiping device 760 described in the above-mentioned first to fifth embodiments, the arrangement position of the screen can be changed when the screen size is changed. It was done like this. That is, the rail 701 and the rail 702 are characterized in that they are used both for moving the screen for using the back wiping device 760 and for changing the arrangement position of the screen due to the change in the size of the screen. As described above, in the sixth embodiment, the back wiping device 760 is used.
A major feature is that the change of the arrangement position of the screen on the screen and the change of the arrangement position of the screen depending on the screen size are achieved by using one mechanism.

As described in the first embodiment, the screen mounting portion 740 is always pulled (pressed) in the direction of arrow C1 during positioning.
Therefore, the stop pin 812 of the stopper 57 stops the movement of the positioning pin 98 of the positioning cylinder 59 in the arrow C1 direction. When the stop pin 812 and the positioning pin 98 come into contact with each other, the screen mounting portion 740 is accurately positioned. The positioning pin 98 can be moved up and down by the positioning cylinder 59. When the screen mounting portion 740 slides, the positioning pin 98 moves the positioning cylinder 5
It is housed inside 9. Therefore, the positioning pin 98 does not interfere with the stop pin 812 during the movement of the screen mounting portion 740. Further, the amount of protrusion of the stop pin 812 of the stopper 57 can be finely adjusted, and by adjusting the amount of protrusion of the stop pin 812 from the stopper 57, the screen mounting portion 740 can be positioned more accurately. it can. Although the case where four stoppers 56 and four stoppers 57 are provided is shown, the number may be four or more.
Alternatively, only one stopper 56 and one stopper 57 may be provided, and the stopper 56 and the stopper 57 may be arranged so as to be slidable in the C1 and C2 directions. In this case, after the stopper 56 and the stopper 57 are fixed at predetermined positions, the positioning cylinder 58 of the positioning cylinder 59 can be brought into contact with the screen mounting portion 740 to position it.

In the sixth embodiment, the rotary drive unit 61 and the rotary drive unit 62 are provided on both sides of the base. In this way, by lifting the screen rotation frame 53 at two places, the cantilever state disappears, and accurate plate separation can be performed on both the left and right sides. As described above, the pin receiving plate 74 and the pin receiving plate 75 are flat plates arranged on the same surface as the screen 201. Therefore, the point where the drive pin 64 and the drive pin 65 contact the pin receiving plate 74 and the pin receiving plate 75, that is, the rotational drive point U is always on the same plane as the screen 201.

FIG. 24 is a diagram showing the relationship among the screen printing plate 200, the rotation center C, and the rotation drive point U. In FIG. 24, the center of rotation C is on the same surface as the screen 201, and the screen frame 211 on the surface of the screen 201.
It is directly under the inner wall of the. The rotation driving point U is also located directly below the inner wall of the screen frame 211 on the surface of the screen 201. The length W is the outer length of the screen frame 211, the length L is the inner length of the screen frame 211, and the length M is
Is the distance between the rotation center C and the rotation drive point U, the length P is the print area, and A is the print center, W> L, L = M, M> P
Shows the case.

The feature of the sixth embodiment is that the rotation center C and the rotation driving point U are always arranged inside the screen frame 211 even if the size of the screen is changed. If the rotation center C and the rotation drive point U are inside the screen frame 211 and outside the printing area P, they may be at any positions as shown in FIG. The rotation center C and the rotation drive point U need only be at the same distance from the center A). As shown in FIG. 26, when the center of rotation C is outside the screen frame 211, the amount of print misalignment increases and the print quality deteriorates. Also, as shown in FIG.
When the rotation drive point U is outside the screen frame 211, the amount of lifting the screen increases, and the time for raising the rotation drive point U becomes longer than that in the case of FIG. .

As described above, the feature of the sixth embodiment is that the rotation center C and the rotation driving point U are located inside the screen frame 211 on the surface of the screen 201, as shown in FIGS. 24 and 25. It is arranged.

FIG. 28 is a view for explaining the roles of the angle adjusting pin 66 and the angle adjusting pin 67. As shown in FIG. 28, the angle adjusting pin 67 can be protruded by V1 with respect to the screen rotating frame 53, and as shown in FIG. 29, it can be protruded by V2.
That is, by adjusting the protrusion amount of the angle adjusting pin 67, the arrangement angle of the screen rotating frame 53 with respect to the slide frame 54 can be changed. Screen rotating frame 53
By changing the arrangement angle of the slide frame 54, the print shift amount can be finely adjusted.

[0057]

As described above, according to the present invention, it is possible to wipe the back of the screen and change the arrangement position of the screen by moving the screen by the screen moving unit.

Further, according to the present invention, even if the screen size is changed, the rotation center C and the rotation drive point U can be arranged inside the screen frame, and a plate separating device with a small amount of printing deviation is provided. can do.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a configuration of a lower portion of a printing unit according to a first embodiment.

FIG. 2 is a diagram showing a configuration of an upper portion of a printing unit according to the first embodiment.

FIG. 3 is a sectional view of a stroke portion according to the first embodiment.

FIG. 4 is a front view of the screen printing machine according to the first embodiment.

FIG. 5 is a side view of the screen printing machine according to the first embodiment.

FIG. 6 is a plan view of the screen printing machine according to the first embodiment.

FIG. 7 is a diagram showing a relationship between a drive plate and a screen mounting portion according to the first embodiment.

FIG. 8 is a diagram showing a fixing portion according to the first embodiment.

FIG. 9 is a diagram showing a positioning portion of the screen printing plate according to the first embodiment.

FIG. 10 is a diagram showing a camera unit section according to the first embodiment.

FIG. 11 is a diagram showing another example of the gear and the rack according to the second embodiment.

FIG. 12 is a diagram showing another example of the drive unit according to the second embodiment.

FIG. 13 is a diagram showing another example of the screen mounting portion according to the third embodiment.

FIG. 14 is a diagram showing another example of the camera unit section according to the third embodiment.

FIG. 15 is a diagram showing another example of the camera unit section according to the third embodiment.

FIG. 16 is a perspective view of a conventional screen printing machine.

FIG. 17 is a side view of a conventional screen printing machine.

FIG. 18 is a plan view of a conventional screen printing machine.

FIG. 19 is an exploded perspective view of the sixth embodiment excluding the upper portion of the printing unit.

FIG. 20 is a plan view with the upper part of the printing unit of the screen printing machine removed.

FIG. 21: Screen plate making 200 of screen printing machine
It is the side view which arranged.

FIG. 22 is an operation explanatory view of the plate separating device of the screen printing machine.

FIG. 23 is a side view when the screen size of the screen printing machine is changed.

FIG. 24 is a diagram showing a relationship among a screen printing plate 200, a rotation driving point U, and a rotation center C.

FIG. 25 is a diagram showing a relationship among the screen printing plate 200, the rotation driving point U, and the rotation center C.

FIG. 26 is a view showing a case where the center of rotation C is outside the screen printing plate 200.

FIG. 27 is a view showing a case where the rotation driving point U is outside the screen plate making 200.

FIG. 28 is a diagram illustrating the function of the angle adjusting pin 67.

FIG. 29 is a diagram for explaining the function of the angle adjusting pin 67.

[Explanation of symbols]

53 screen rotation frame, 54 slide frame, 55 positioning part, 56, 57 stopper, 58, 59 positioning cylinder, 61, 62 rotation drive part, 64, 65 drive pin, 66, 67 angle adjustment pin, 68 backrest, 7
4,75 pin receiving plate, 77,78 slide rail,
83,84 rotating shaft, 85,86,87,88 bearing, 98,99 positioning pin, 111 squeegee, 1
16 stroke parts, 200 screen plate making, 201
Screen, 211 screen frame, 400 fulcrum axis, 401, 402, 701, 702 rail, 40
3,404,703,704 Rack, 405,40
6, 705, 706 gears, 407, 408, 707,
708 slider, 409 slide shaft, 410, 71
0 motor, 411 slide shaft engaging portion, 413, 414
Slider bearing, 415, 416 Stroke bearing, 451, 452 cylinder, 700 drive shaft, 73
0 drive plate, 731 drive bearing, 732 bracket, 740 screen mounting part, 742 slide block, 750 camera unit part, 752 arm rail, 754 arm, 755 camera, 760 back wiping device, 761 roller, 762 adhesive film, 76
3 Winding part, 811 Shock absorber, 812
Stop pin, 851 fixing piece, 852 cylinder,
861 rod cylinder, C rotation center, U rotation drive point, W1, W2 length.

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B41F 15/36 B41F 15/12 B41F 35/00 H05K 3/12 610 H05K 3/34 505

Claims (5)

(57) [Claims] 1. A screen printing machine having a screen moving unit for moving the screen, wherein movement of the screen by the screen moving unit is changed by changing a setting position of the screen for wiping the back of the screen.
Used for both the change of the screen set position according to the screen size, the screen moving part is stopped position of the movement of the screen corresponding to the screen size
And a plurality of stoppers provided at a plurality of positions to be placed together with the screen to move one of the plurality of stoppers.
The position where the pin contacts the stopper to position the screen
A screen printing machine having an arranging cylinder . Wherein the screen printing machine, comprising a printing unit for a screen printing and a back wiping unit for wiping the back of the back surface of the screen, the screen movement unit, screen plate fitted with the screen to the screen frame A screen mounting part for mounting the rail, a rail extending between the printing part and the back wiping part, and a movement drive part for moving the screen mounting part in the forward and reverse directions between the printing part and the back wiping part according to the rail, Having the plurality of stoppers and the positioning cylinder,
Using the plurality of stoppers and the positioning cylinder
2. The screen printing machine according to claim 1, further comprising a positioning unit that positions the screen mounting unit in the printing unit according to the screen size. Wherein the positioning unit, when <br/> the screen mounting portion is moved in the direction of the printing unit, in response to the scan clean size, screen-up
A plurality of stoppers provided at a plurality of positions that are the stop positions of the attachment portions, and the positioning cylinder that abuts one of the stoppers to position the screen attachment portion. The screen printing machine according to claim 2. 4. The screen mounting portion is mounted on a slide frame that slides on a rail, and is rotatably mounted on the slide frame via a rotary shaft.
The screen printing machine according to claim 3, further comprising a screen rotating frame to which the screen plate is attached. 5. The screen printing machine according to claim 1, wherein the mounting position is changeable in the same direction as the moving direction of the screen, and the driving force for rotating the screen rotating frame is transmitted to the screen rotating frame. The screen printing machine according to claim 4, further comprising a section.