WO2017216948A1

WO2017216948A1 - Screen printer

Info

Publication number: WO2017216948A1
Application number: PCT/JP2016/068078
Authority: WO
Inventors: 立雄蛭川; 毅近藤
Original assignee: 富士機械製造株式会社
Priority date: 2016-06-17
Filing date: 2016-06-17
Publication date: 2017-12-21
Also published as: JP6674541B2; JPWO2017216948A1

Abstract

This printer has a pair of moving clamp units 47a, 47b that are controlled by a control device so as to be capable of moving in a Y direction so as to clamp a screen mask at a position within a movement range separated in the Y direction from a side clamp 23b of a substrate S. Therefore, interference between the clamps of the screen mask and the clamps of the substrate S can be avoided, and the screen mask M can be clamped appropriately.

Description

Screen printing device

The present invention relates to a screen printing apparatus.

2. Description of the Related Art Conventionally, a screen printing apparatus that performs screen printing on a substrate that is clamped by a holder block and transported to the bottom of the screen mask is known (for example, see Patent Document 1). In this screen printing apparatus, the holder block is attached to the holder base by bolting, and the operator can move the holder block by loosening the bolts, so that it can handle screen masks of different sizes. Yes.

Japanese Patent Laid-Open No. 04-193535

However, in the screen printing apparatus described above, the holder block is moved manually by the operator, so that there is a possibility that the holder block is attached to an incorrect position. Some screen printing devices clamp the entire width of the substrate along the substrate transport direction. Depending on the position of the holder block, the screen mask clamp may interfere with the substrate clamp, and printing on the substrate may occur. It may not be able to be done properly.

The main object of the present invention is to appropriately clamp the screen mask while avoiding interference between the screen mask clamp and the substrate clamp.

The present invention adopts the following means in order to achieve the main object described above.

The screen printing apparatus of the present invention is
A screen printing apparatus that performs screen printing on a substrate using a screen mask,
A pair of substrate clamping units for clamping the substrate;
At least a pair of mask clamp units that clamp the screen mask by sandwiching both ends of the screen mask in a predetermined direction from above and below;
A control device for controlling the operation of the mask clamp unit;
With
As the mask clamp unit, the controller moves in the orthogonal direction within the predetermined range so as to clamp the screen mask at a position within a predetermined range that is out of the substrate clamp unit in an orthogonal direction orthogonal to the predetermined direction. The gist is to include at least a pair of movable clamp units that can be controlled.

The screen printing apparatus according to the present invention includes a pair of substrate clamp units that clamp the substrate and at least a pair of mask clamp units that clamp the screen mask by sandwiching both ends of the screen mask in a predetermined direction from above and below. Further, the mask clamp unit is controlled by the control device so as to be movable in the orthogonal direction within the predetermined range so as to clamp the screen mask at a position within the predetermined range that is out of the substrate clamp unit in the orthogonal direction orthogonal to the predetermined direction. At least a pair of movable clamp units are provided. Accordingly, the screen mask can be clamped by automatically moving the mask clamp unit to a position away from the substrate clamp unit without depending on the manual operation of the operator. For this reason, it can avoid that the part which clamps the lower side of a screen mask in a mask clamp unit interferes with a board | substrate clamp unit. Therefore, it is possible to appropriately clamp the screen mask while avoiding interference between the mask clamp unit and the substrate clamp unit.

In the screen printing apparatus according to the aspect of the invention, the movable clamp unit is configured such that the clamp unit disposed on one side in the predetermined direction is configured to be movable in the orthogonal direction by driving of the driving device and disposed on the other side. A clamp unit is configured to be freely movable in the orthogonal direction, and the control device is configured to drive the one of the mask clamp units by driving the drive device while the screen mask is clamped by the movable clamp unit. By moving the clamp unit arranged on the side in the orthogonal direction, the clamp unit arranged on the other side may be moved in the orthogonal direction via the screen mask. In this case, the pair of movable clamp units can be appropriately moved with a simple configuration in which the clamp unit on one side is moved by the driving device.

In the screen printing apparatus of the present invention, the orthogonal direction is a front-rear direction of the screen printing apparatus, and the movable clamp unit exceeds the predetermined range in the orthogonal direction in a state in which the screen mask is clamped. Further, it may be configured to be movable to the front side of the screen printing apparatus or at least one side of the rear side of the screen printing apparatus exceeding the predetermined range. In this way, the screen mask can be moved to the front side of the apparatus and the rear side of the apparatus from the clamp position. For example, the operator can easily perform various operations. It can also be used for purposes other than avoiding interference.

In the screen printing apparatus of the present invention, before the screen printing is performed, the control device includes a position in the orthogonal direction of the screen mask clamped by the movable clamp unit of the mask clamp unit, and the substrate. The movable clamp unit in a state in which the screen mask is clamped may be moved so that the positional deviation of the substrate clamped by the clamp unit from the position in the orthogonal direction is eliminated. In this way, the movable clamp unit can be used for alignment in the orthogonal direction between the screen mask and the substrate. For this reason, it is not necessary to provide another device for correcting the position of the substrate in the orthogonal direction.

In the screen printing apparatus of the present invention, a mask without a frame in which a mask plate is not surrounded by a frame is used as the screen mask, and the control device is configured to orthogonally cross the frameless mask during the screen printing. The movable clamp unit may be actuated so that the pulling force is applied. By doing so, it is possible to appropriately perform screen printing using a mask without a frame by using the movable clamp unit also for holding a mask without a frame.

In the screen printing apparatus according to the aspect of the invention, the control device may be configured such that after the screen printing is performed, the screen mask is finely moved in a state where the screen mask is clamped by the movable clamp unit among the mask clamp units. The movable clamp unit may be operated so as to vibrate. In this way, when the substrate and the screen mask are separated from each other after the screen printing, the movable clamp unit can also be used to easily remove the solder from the printing pattern (hole) provided in the screen mask.

In the screen printing apparatus of the present invention that performs the screen printing a plurality of times on the one substrate, a plurality of printing patterns having different shapes for the plurality of times of screen printing in the one mask plate as the screen mask. Is used in the orthogonal direction, and the control device is in a state where the screen mask is clamped by the movable clamp unit among the mask clamp units before the screen printing is performed. The movable clamp unit may be moved so that a print pattern necessary for the screen printing is located on the substrate among the plurality of print patterns. If it carries out like this, a movable clamp unit can be combined also with the response | compatibility to the screen printing of multiple times with respect to one board | substrate.

In the screen printing apparatus of the present invention, one of the pair of substrate clamp units is fixed to be immovable and the other is configured to be movable in the orthogonal direction, and the mask clamp unit is configured to move in the orthogonal direction. A pair of fixed clamp units fixed at positions outside the substrate relative to the fixed substrate clamp unit, and outside the substrate relative to the movable substrate clamp unit in the orthogonal direction. It is good also as what is comprised with the said pair of movable clamp unit which can move within the said predetermined range including a position. If it carries out like this, it can be set as the simple structure which does not provide multiple pairs of movable clamp units.

1 is an external perspective view of a printing apparatus 1 according to an embodiment. 1 is a configuration diagram of a printing apparatus 1. FIG. It is a block diagram of the side clamp device 23 and the mask clamp device 40. 2 is a configuration perspective view of a mask clamp device 40. FIG. 3 is a block diagram illustrating an electrical connection relationship of a control device 70. FIG. It is explanatory drawing which shows the relationship between each clamp position of the board | substrate S and the screen mask M. FIG. It is explanatory drawing of a mode that the movable clamp unit 47 is operated before screen printing. It is explanatory drawing of a mode that the movable clamp unit 47 is operated after screen printing. It is explanatory drawing of a mode that the frameless mask Mfl is clamped. It is explanatory drawing which shows an example of the screen mask M3 in which two printing patterns were formed. It is explanatory drawing of screen printing using the screen mask M3. It is explanatory drawing of a mode that the movable clamp unit 47 is moved to the Y direction front side exceeding the movement range MR. It is explanatory drawing of a mode that the movable clamp unit 47 is moved to the Y direction back side exceeding the movement range MR.

Next, an embodiment of the present invention will be described. FIG. 1 is an external perspective view of the printing apparatus 1 according to the present embodiment, FIG. 2 is a configuration diagram of the printing apparatus 1, and FIG. 3 is a configuration diagram of a side clamp device 23 and a mask clamp device 40. 4 is a structural perspective view of the mask clamp device 40, and FIG. 5 is a block diagram showing the electrical connection relationship of the control device 70. As shown in FIG.

The printing apparatus 1 of the present embodiment performs screen printing in which solder is pressed into a pattern hole formed in a rectangular screen mask M and applied to a substrate S. The X direction in FIGS. 1 to 4 is a direction (predetermined direction) for transporting the substrate S and the left and right direction of the printing apparatus 1, and the Y direction is a direction (orthogonal direction) for moving the squeegee 31 and printing. It is the front-rear direction of the device 1. The printing apparatus 1 performs screen printing on a plurality of types of substrates S having different widths in the X direction and Y direction. The screen mask M is replaced by a worker according to the type of the substrate S. The printing apparatus 1 can use a screen mask M having a frame F around the mask plate and a frameless mask Mfl having no frame F.

1 and 2, the printing apparatus 1 includes an apparatus main body 10, and a front cover 3, a side cover 5, and an upper cover 7 that cover the front, side, and upper surfaces of the apparatus main body 10, respectively. The top cover 7 can be opened and closed, and a touch panel type display operation panel 18 capable of various input operations and information display is attached. The operator can select or input the type and size of the screen mask M by operating the display operation panel 18. The front cover 3 is provided with an opening 3a through which the screen mask M can be inserted and removed at a position below the display operation panel 18 of the closed top cover 7, and an opening / closing plate 4 capable of opening and closing the opening 3a is attached. ing. Further, as shown in FIG. 2, the apparatus main body 10 includes a base 12, a casing 14 provided in a pair in the X direction on the base 12, a substrate transfer device 22, a side clamp device 23, and a backup. The apparatus 24, the mask clamp apparatus 40, and the printing part 30 are provided.

The substrate transfer device 22 includes a pair of belt conveyors 22a and 22b in the Y direction. The board | substrate conveyance apparatus 22 conveys the board | substrate S from the back of FIG. 2 to this side (X direction) by the drive of the belt conveyors 22a and 22b.

The side clamp device 23 includes a pair of side clamps 23a and 23b in the Y direction. Of the pair of side clamps 23a and 23b, one (for example, the front side clamp 23a) is fixed, and the other (for example, the rear side clamp 23b) is configured to be slidable in the Y direction. The side clamp device 23 slides the other side clamp 23b toward the substrate S in a state in which the substrate S is transported by the substrate transport device 22, and both sides of the substrate S in the Y direction by the pair of side clamps 23a and 23b. Clamp the surface (see Figure 3). The upper surfaces of the side clamps 23a and 23b at the time of clamping are substantially the same height as the upper surface of the substrate S. The side clamp device 23 can be raised by a lifting device (not shown) until the clamped substrate S comes into contact with the screen mask M.

The backup device 24 includes a backup table 25 that can be moved up and down by a lifting device (not shown), and a plurality of backup pins 26 installed on the backup table 25. The backup device 24 raises the backup table 25 in a state where the substrate S is transported by the substrate transport device 22 and backs up the substrate S from the lower surface by the backup pins 26. The position of the backup pin 26 on the backup table 25 can be changed by the operator according to the type (size) of the substrate S.

The printing unit 30 performs screen printing by moving a print head 32 to which a squeegee 31 is attached so as to be movable up and down in the Y direction. The printing unit 30 includes a drive motor 33 and a belt 34 that is connected to the print head 32 and rotates by driving the drive motor 33, and the belt 34 is rotated by driving the drive motor 33 to move the print head 32 in the Y direction. Let

The mask clamp device 40 includes a pair of mask holders 41 (41a, 41b) in the X direction, as shown in FIGS. Each

mask holder

41a, 41b is adjusted to a position corresponding to the width of the screen mask M in the X direction by an operator using an X direction position adjusting device (not shown). Further, the mask clamp device 40 is movable to the base member 41v of each

mask holder

41a, 41b in a Y direction and a pair of fixed clamp units 43 (43a, 43b) that are fixedly movable in the Y direction. A pair of movable clamp units 47 (47a, 47b) attached to the drive unit 50, and a drive device 50 for moving the movable clamp unit 47 in the Y direction.

The fixed

clamp units

43a and 43b include a support member 44 fixed to the outer surface of the base member 41v by a bolt 46, and a clamp cylinder 45 supported by the upper surface portion of the support member 44 and projecting the piston rod downward. With. The clamp cylinder 45 has a contact member 45a attached to the tip of the piston rod. The fixed clamp unit 43 sandwiches both ends of the screen mask M (frame F) in the X direction from above and below between the contact member 45a and the lower surface 44a of the support member 44 (see an enlarged view in FIG. 3). The screen mask M is held. The fixed clamp unit 43 is disposed on the outer side (front side in the Y direction) with respect to the substrate S than the side clamp 23a.

The

movable clamp units

47a and 47b include a support member 48 that can slide on the upper surface and the outer surface of the base member 41v, and a clamp cylinder that is supported by the upper surface portion of the support member 48 and projects the piston rod downward. 49. The clamp cylinder 49 has a contact member 49a attached to the tip of the piston rod. The movable clamp unit 47 holds the screen mask M by sandwiching both ends in the X direction of the screen mask M (frame F) from above and below between the contact member 49a and the lower surface portion 48a of the support member 48. .

The driving device 50 includes a driving unit 50a provided on the outer surface of the base member 41v of one mask holder 41a, and an interlocking unit on the outer surface of the base member 41v of the other mask holder 41b. 50b is provided. The drive unit 50a is a Y-axis single-axis actuator, and includes a drive motor 51, a guide rail 52 that is connected to the rotation shaft of the drive motor 51 and extends in the Y direction, and a nut that is screwed into the ball screw. And a drive slider 54 that is coupled to the nut and moves in the Y direction along the guide rail 52 by the drive of the drive motor 51. The drive slider 54 is connected to the support member 48 of one (right side in FIG. 4) movable clamp unit 47a. For this reason, the movable clamp unit 47 a moves in the Y direction with the movement of the drive slider 54 by the drive motor 51. The drive motor 51 has an encoder 51a (see FIG. 5) for detecting the amount of rotation on the rotating shaft, and the position of the movable clamp unit 47 (47a) in the Y direction can be controlled based on the detected value of the encoder 51a. It becomes. The interlocking portion 50b is configured in the same manner as the driving portion 50a except that the interlocking portion 50b does not include the driving motor 51 and the ball screw. That is, the interlocking part 50 b includes a guide rail 53 extending in the Y direction and a moving slider 55 that freely moves in the Y direction along the guide rail 53. The movable slider 55 is connected to the support member 48 of the other (the left side in FIG. 4) movable clamp unit 47b. For this reason, the movable clamp unit 47 b moves in the Y direction while being guided by the movable slider 55. Accordingly, when the movable clamp unit 47a is moved by driving the drive unit 50a in a state where the pair of

movable clamp units

47a and 47b clamps the screen mask M, the movable clamp unit 47b is moved via the screen mask M. And the movement slider 55 moves in conjunction.

In addition, the printing apparatus 1 includes a mask stocker 16 for stocking a plurality of screen masks M as shown in FIG. The mask stocker 16 is disposed at the rear of the housing 14, and transports the screen mask M in the Y direction and includes a plurality of upper and lower conveying conveyors 17 in the X direction (3 in FIG. 2). One) is provided. The mask stocker 16 can be moved up and down by a lifting mechanism (not shown). The mask stocker 16 drives the transport conveyor 17 in a state where the upper surface of any one of the transport conveyors 17 is at the same height as the upper surfaces of the lower surface portions 44a and 48a of the

support members

44 and 48 of the mask holder 41. The mask M is carried into the holder clamp device 40, and the screen mask M is carried out from the holder clamp device 40.

Further, as shown in FIG. 5, the printing apparatus 1 includes a mark camera 19 that captures various marks and a control device 70 that controls the entire apparatus. For example, the mark camera 19 moves between the substrate S and the screen mask M in a state where the substrate S is transferred by the substrate transfer device 22, and is provided on the substrate mark and the screen mask M provided on the substrate S. The mask mark can be imaged. The control device 70 is configured as a microprocessor centered on the CPU 71, and includes a ROM 72, an HDD 73, a RAM 74, an input / output interface 75 and the like in addition to the CPU 71. These are electrically connected to each other via a bus 76. An operation signal from the display / operation panel 18, a mark image from the mark camera 19, a rotation amount detection signal from the encoder 51 a of the drive device 50 (drive motor 51), and the like are input to the control device 70. On the other hand, from the control device 70, a drive signal to the mask stocker 16, a display signal to the display operation panel 18, an imaging instruction signal to the mark camera 19, a drive signal to the substrate transport device 22, and a drive to the side clamp device 23. A signal, a drive signal to the backup device 24, a drive signal to the printing unit 30, a drive signal to the fixed clamp unit 43, a drive signal to the movable clamp unit 47, a drive signal to the drive device 50, and the like are output. . The control device 70 can also perform clamping and releasing of the mask clamping device 40 and movement of the movable clamping unit 47 based on the operation of the operator via the display / operation panel 18. .

Next, the operation of the printing apparatus 1 according to the present embodiment configured as described above, in particular, the operation of the mask clamp apparatus 40 will be described. In the following explanatory diagrams, the mask clamp device 40 is simply illustrated with the drive device 50 and the like omitted. Further, the fixed clamp unit 43 and the movable clamp unit 47 (47a, 47b) indicate the state of being clamped by shading and the state of not being clamped by white.

FIG. 6 is an explanatory diagram showing the relationship between the clamp positions of the substrate S and the screen mask M. FIG. 6 shows two types of substrates S1 and S2 having different sizes and two types of screen masks M1 and M2 for each of the substrates S1 and S2 having a frame F around them. As described above, since one side clamp 23a of the substrate S is fixed and serves as a reference in the Y direction, the clamp position of the side clamp 23a is constant for both the substrates S1 and S2. Further, since the other side clamp 23b of the substrate S is slidable in the Y direction, the clamp position of the side clamp 23b is a position corresponding to the width of the substrates S1 and S2 in the Y direction. On the other hand, the mask clamp device 40 clamps both ends of the screen mask M in the X direction on the front side in the Y direction with respect to the side clamps 23a by the fixed clamp unit 43. In the mask clamp device 40, since the movable clamp unit 47 is movable in the Y direction, the screen mask M is located at a position outside the side clamp 23b with respect to the substrate S, that is, a position that does not interfere with the side clamp 23b. Both ends of the X direction can be clamped. Thus, even if the side clamp 23b moves in the Y direction according to the size of the substrates S1 and S2, the both ends in the X direction on the rear side in the Y direction of the screen masks M1 and M2 at positions that do not interfere with the side clamp 23b. Can be clamped. If the smallest substrate S is the substrate S1 in FIG. 6A, the largest substrate S is the substrate S2 in FIG. 6B, and the screen masks M1 and M2 have the same width in the Y direction, the movement By configuring the driving device 50 so that the type clamp unit 47 can move within a predetermined movement range MR in the drawing, interference with the side clamp 23b can be avoided. In this example, if the widths of the substrates S1 and S2 in the Y direction are the widths SY1 and SY2, respectively, the movement range MR may be a range equal to or greater than a value ((SY2-SY1) / 2). The movable clamp unit 47 may be clamped at a position on the inner side of the substrate S with respect to the side clamp 23b as long as the movable clamp unit 47 does not interfere with the side clamp 23b.

FIG. 7 is an explanatory diagram showing a state in which the movable clamp unit 47 is operated before screen printing. FIG. 7A shows a state in which the screen printing of the substrate S1 in FIG. 6A is finished (not shown) and the screen mask M2 for the substrate S2 is placed on the mask holder 41. At this time, the control device 70 clamps the screen mask M2 by the movable clamp unit 47 and releases the clamp by the fixed clamp unit 43. In this state, the control device 70 drives the driving device 50 to move the movable clamp unit 47 to a position where it does not interfere with the clamping position of the substrate S2 of the side clamp 23b (FIG. 7B). As described above, the movable clamp unit 47a is moved by the drive motor 51 of the drive unit 50a (solid arrow in the figure), and the movable clamp unit 47b is moved in conjunction with the screen mask M (see FIG. Middle dotted arrow). When the substrate S2 is clamped, the control device 70 causes the mark camera 19 to capture the substrate mark of the substrate S2 and the mask mark of the screen mask M2, and relative to the substrate S2 and the screen mask M2 from the captured mark image. The amount of misalignment is detected. For example, when detecting the amount of misalignment in the Y direction, the control device 70 moves the movable clamp unit 47 until the position of the screen mask M2 reaches a position that eliminates the misalignment in the Y direction (FIG. 7C). )). FIG. 7C shows a state in which the displacement is eliminated by moving the movable clamp unit 47 slightly forward in the Y direction. As described above, the printing apparatus 1 also uses the movable clamp unit 47 for correcting the positional deviation of the substrate S and the screen mask M in the Y direction. Since the control device 70 can control the position of the movable clamp unit 47 based on the detection value of the encoder 51a, the position correction can be performed with high accuracy.

FIG. 8 is an explanatory diagram showing a state in which the movable clamp unit 47 is operated after screen printing. When the screen printing is completed (FIG. 8A), the control device 70 releases the clamp of the screen mask M by the fixed clamp unit 43 and clamps the screen mask M by the movable clamp unit 47 ( FIG. 8B). In this state, the control device 70 operates the movable clamp unit 47 so that the screen mask M slightly vibrates (FIG. 8C). For example, the control device 70 makes the screen mask M slightly vibrate by reciprocating the movable clamp unit 47 by repeating forward and reverse rotations of the drive motor 51 in a short cycle. The printing apparatus 1 can improve the solder removability from the pattern hole of the screen mask M by the slight vibration of the screen mask M. For this reason, when separating the screen mask M and the board | substrate S, the printing apparatus 1 can prevent the crack of a solder printing part, a chip | tip, etc. resulting from a soldering | peeling defect defect.

FIG. 9 is an explanatory diagram showing a state of clamping the frameless mask Mfl. The control device 70 clamps the frameless mask Mfl with the fixed clamp unit 43 and the movable clamp unit 47. Further, during screen printing, the control device 70 operates the movable clamp unit 47 so that a pulling force to the rear side in the Y direction acts on the frameless mask Mfl clamped by the fixed clamp unit 43. For example, the control device 70 controls the drive motor 51 so as to generate a rotational torque in a direction in which the drive slider 53 is directed rearward in the Y direction while the movable clamp unit 47 is clamped. As a result, the printing apparatus 1 can continue to apply tension in the Y direction while clamping the frameless mask Mfl. Therefore, it is possible to appropriately perform screen printing by preventing the frameless mask Mfl from being bent. Holes are formed in both edges in the X direction of the frameless mask Mfl, and pins that engage with the holes of the frameless mask Mfl instead of the contact member 49a at the tip of the piston rod of the clamp cylinder 49, etc. It is good also as what provides this engaging member. And the control apparatus 70 is good also as what applies the pulling force of a Y direction in the state which the engaging member of the movable clamp unit 47 is engaging with the hole of the frameless mask Mfl.

FIG. 10 is an explanatory diagram showing an example of a screen mask M3 on which two printing patterns are formed, and FIG. 11 is an explanatory diagram of screen printing using the screen mask M3. In FIG. 10, one mask plate has portions with different thicknesses, and the print pattern A is formed on the thin portion on the front side in the Y direction and the print pattern is formed on the thick portion on the rear side in the Y direction. It shows what B is formed. The printing pattern A is provided with a plurality of pattern holes Ma corresponding to the formation of a solder printing portion with a small amount of solder. Further, the printed pattern B includes a plurality of pattern holes Mb corresponding to the formation of a solder printed part having a large amount of solder, and a concave part Mc that covers the solder printed part formed by the pattern hole Ma so as not to contact the mask plate. Is provided. First, the control device 70 performs screen printing by clamping the screen mask M3 with the fixed clamp unit 43 and the movable clamp unit 47 at a position where the print pattern A is on the substrate S3 (FIG. 11A). When the screen printing of the printing pattern A is completed, the control device 70 releases the clamp of the screen mask M3 by the fixed clamp unit 43, and the drive device 50 is operated in a state where the movable clamp unit 47 clamps the screen mask M3. Driven, the movable clamp unit 47 is moved forward in the Y direction until the print pattern B is on the substrate S3 (FIG. 11B). Next, the control device 70 causes the fixed clamp unit 43 to clamp the screen mask M3 (FIG. 11C) and performs screen printing of the printing pattern B. As described above, when screen printing is performed in the order of the printing patterns A and B, the printing apparatus 1 uses the movable clamp unit 47 to move the screen mask M3 for switching the printing patterns A and B. For this reason, the printing apparatus 1 can appropriately execute screen printing for mounting a small component and a large component together. Although FIG. 10 illustrates a mask plate having portions with different thicknesses, different print patterns A and B with the same thickness may be formed. In that case, for example, when screen printing is performed on the A surface (front surface) of the substrate S, the control device 70 operates the movable clamp unit 47 so that the print pattern A is on the substrate S, and the B of the substrate S When screen printing is performed on the surface (back surface), the movable clamp unit 47 may be operated such that the printing pattern B is on the substrate S.

FIG. 12 is an explanatory diagram showing how the movable clamp unit 47 is moved forward in the Y direction beyond the movement range MR, and FIG. 13 is a diagram illustrating the movement of the movable clamp unit 47 beyond the movement range MR in the Y direction. It is explanatory drawing of a mode that it is moved to the back side. As shown in FIG. 12, for example, when the screen printing using the screen mask M is completed and the substrate S (not shown) is carried out, the control device 70 releases the clamp of the screen mask M by the fixed clamp unit 43 ( FIG. 12 (a)). And the control apparatus 70 moves the movable clamp unit 47 of the state which clamped the screen mask M to the Y direction front side (FIG.12 (b)). As a result, the movable clamp unit 47 moves to the front side in the Y direction beyond the predetermined movement range MR, and the screen mask M is positioned at the predetermined retracted position on the front side, and the upper surface cover 7 is opened. The operator can perform various operations. For example, the operator can easily perform the operation of wiping off the solder adhered to the back surface of the screen mask M and the operation of adding solder to the screen mask M. In addition, the operator can easily perform the replacement work of the screen mask M. Here, as described above, the printing apparatus 1 is provided with the opening / closing plate 4 that opens and closes the opening 3 a of the front cover 3. When the opening / closing plate 4 opens the opening 3a, the control device 70 moves the movable clamp unit 47 to a predetermined replacement position on the foremost side (moving end) in the Y direction. It is assumed that a part of the front side of the screen mask M is exposed (FIG. 12C). For this reason, the operator can take out the screen mask M from the opening 3 a by releasing the clamp by the movable clamp unit 47. Further, the operator can attach a new screen mask M by inserting the screen mask M into the printing apparatus 10 through the opening 3 a and clamping the screen mask M with the movable clamp unit 47. Thus, the operator can easily replace the screen mask M without opening the top cover 7.

As shown in FIG. 13, the control device 70 moves only the movable clamp unit 47a forward in the Y direction in a state where both the clamp by the fixed clamp unit 43 and the clamp by the movable clamp unit 47 are released, for example. (FIG. 13A). Then, the control device 70 clamps the screen mask M with the movable clamp unit 47a, returns the movable clamp unit 47a to the pre-movement position where the position in the Y direction is the same as that of the movable clamp unit 47b, and then moves. The screen mask M is clamped by the type clamp unit 47b (FIG. 13B). Then, with the pair of

movable clamp units

47a and 47b clamping the screen mask M, the control device 70 moves the movable clamp unit 47 rearward in the Y direction (FIG. 13C). As a result, the movable clamp unit 47 moves beyond the predetermined movement range MR to the rear side in the Y direction, and the screen mask M is positioned at a predetermined retreat position on the rear side. The operator can perform various operations. For example, the operator can easily perform a setup change operation such as changing the installation position of the backup pin 26 on the backup table 25 according to the type (size) of the substrate S. Further, in order to perform various operations, the screen mask M can receive the solder dripping from the squeegee 31 while the printing unit 30 is retracted to the rear side in the Y direction. Moreover, the screen mask M can be easily transferred to and from the conveyor 17 of the mask stocker 16 by moving the screen mask M backward in the Y direction. As shown in FIG. 13, the moving clamp unit 47 is not limited to move, and after screen printing is finished, the movable clamp unit 47 moves backward in the Y direction with the screen mask M clamped. It is good also as what makes it. In addition, since the screen mask M can be moved forward or backward in the Y direction as described above, for example, in a printing apparatus that wipes the back surface of the screen mask M with the cleaning unit, the screen with the cleaning unit fixed is used. Since the wiping can be performed by moving the mask M, it is not necessary to provide a moving mechanism in the cleaning unit.

Here, the correspondence between the main elements of the present embodiment and the main elements of the invention described in the summary section of the invention will be described. That is, the side clamps 23a and 23b of the present embodiment correspond to the substrate clamp unit of the present invention, the movable clamp unit 47 corresponds to the movable clamp unit, and the control device 70 corresponds to the control device. The driving device 50 corresponds to a driving device, and the fixed clamp unit 43 corresponds to a fixed clamp unit.

The printing apparatus 1 of the present embodiment described above is controlled to move in the Y direction by the control device 70 so that the screen mask M is clamped at a position within the predetermined movement range MR that deviates from the side clamp 23b of the substrate S in the Y direction. The movable clamp unit 47 is provided. For this reason, it is possible to appropriately clamp the screen mask M while avoiding interference between the clamp of the screen mask M and the clamp of the substrate S. In addition, since the printing apparatus 1 moves the movable clamp unit 47a in the Y direction while the screen mask M is clamped, the movable clamp unit 47b is interlocked via the screen mask M. The pair of

movable clamp units

47a and 47b can be moved. Moreover, since the mask clamp apparatus 40 is comprised by a pair of fixed clamp unit 43 and a pair of movable clamp unit 47, it can be set as the simple structure which does not provide multiple pairs of movable clamp units.

Further, the printing apparatus 1 can move forward and backward beyond the movement range MR in a state where the movable clamp unit 47 is clamping the screen mask M, so that other than avoiding interference with the clamp of the substrate S Also, the movable clamp unit 47 can be used. Further, the control device 70 moves the movable clamp unit 47 in a state where the screen mask M is clamped before screen printing, so that the positional deviation in the Y direction between the screen mask M and the substrate S is eliminated. The position can be corrected. Further, the control device 70 can appropriately hold the frameless mask Mfl by operating the movable clamp unit 47 so that a tensile force acts on the frameless mask Mfl during screen printing. Further, the control device 70 can improve the solder removability by operating the movable clamp unit 47 so that the screen mask M slightly vibrates after screen printing. In addition, since the control device 70 moves the movable clamp unit 47 so that a print pattern necessary for screen printing is positioned on the substrate S in a state where the screen mask M3 is clamped, the control device 70 performs a plurality of times for one substrate. The movable clamp unit 47 can be used for screen printing.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be implemented in various modes as long as it belongs to the technical scope of the present invention.

For example, in the embodiment described above, a fixed side clamp 23 a and a movable side clamp 23 b are provided for clamping the substrate S, and a pair of fixed clamp units 43 and a pair of movable types are used for clamping the screen mask M. Although it is provided with the clamp unit 47, it is not limited to this. For example, a plurality of pairs of movable clamp units may be provided for clamping the screen mask M, for example, only a movable clamp is provided without a fixed clamp (side clamp 23a or fixed clamp unit 43).

In the above-described embodiment, the movable clamp unit 47 is moved by a configuration in which the drive device 50 uses a ball screw mechanism having the drive motor 51. However, the present invention is not limited to this. For example, the movable clamp unit may be moved by another electric actuator such as an electric cylinder, or a hydraulic or pneumatic actuator (rodless cylinder or the like).

In the above-described embodiment, only the movable clamp unit 47a of the pair of

movable clamp units

47a and 47b is moved by driving of the driving device 50 (drive unit 50a), and the movable clamp unit 47b is interlocked. It is not limited. The drive unit 50a may be provided in any of the pair of

movable clamp units

47a and 47b and moved by driving the drive unit 50a.

In the above-described embodiment, the movable clamp unit 47 is movable to both the front side and the rear side of the printing apparatus 1 beyond the movement range MR, but it is only necessary to be movable to at least one side. Alternatively, the movable clamp unit 47 may not move beyond the movement range MR.

In the above-described embodiment, the side clamp device 23 clamps the substrate S by pressing both side surfaces of the substrate S in the Y direction. However, the present invention is not limited to this. For example, it is good also as a clamping device which clamps the board | substrate S by arrange | positioning along the board | substrate conveyance apparatus 22 (belt conveyor 22a, 22b), and clamping the both ends of the Y direction of the board | substrate S from an up-down direction.

The present invention can be used in the printing device manufacturing industry.

1 printing device, 3 front cover, 3a opening, 4 opening / closing plate, 5 side cover, 7 top cover, 10 device body, 12 base, 14 housing, 16 mask stocker, 17 transport conveyor, 18 display operation panel, 19 Mark camera, 22 substrate transfer device, 22a, 22b belt conveyor, 23 side clamp device, 23a, 23b side clamp, 24 backup device, 25 backup table, 26 backup pin, 30 printing unit, 31 squeegee, 32 print head, 33 drive Motor, 34 belt, 40 mask clamp device, 41, 41a, 41b mask holder, 41v base member, 43, 43a, 43b fixed clamp unit, 44, 48 support member, 44a, 48a lower surface, 45, 49 Clamp cylinder, 45a, 49a contact member, 46 bolt, 47, 47a, 47b, movable clamp unit, 50 drive unit, 50a drive unit, 50b interlocking unit, 51 drive motor, 51a encoder, 52, 53 guide rail, 54, 55 slider, 70 control device, 71 CPU, 72 ROM, 73 HDD, 74 RAM, 75 I / O interface, 76 bus, F frame, M, M1 to M3 screen mask, Ma, Mb pattern hole, Mc recess, Mfl frameless Mask, S, S1-S3 substrate.

Claims

A screen printing apparatus that performs screen printing on a substrate using a screen mask,
A pair of substrate clamping units for clamping the substrate;
At least a pair of mask clamp units that clamp the screen mask by sandwiching both ends of the screen mask in a predetermined direction from above and below;
A control device for controlling the operation of the mask clamp unit;
With
As the mask clamp unit, the controller moves in the orthogonal direction within the predetermined range so as to clamp the screen mask at a position within a predetermined range that is out of the substrate clamp unit in an orthogonal direction orthogonal to the predetermined direction. A screen printing apparatus comprising at least a pair of movable clamp units that are operatively controlled.
The screen printing apparatus according to claim 1,
The movable clamp unit is configured such that a clamp unit arranged on one side in the predetermined direction is movable in the orthogonal direction by driving of a driving device, and a clamp unit arranged on the other side is free in the orthogonal direction. Is configured to be movable,
The control device moves a clamp unit arranged on the one side in the orthogonal direction by driving the drive device in a state where the screen mask is clamped by the movable clamp unit among the mask clamp units. Accordingly, a screen printing apparatus that moves the clamp unit disposed on the other side through the screen mask in the orthogonal direction in conjunction with each other.
The screen printing apparatus according to claim 1 or 2,
The orthogonal direction is the front-rear direction of the screen printing apparatus,
The movable clamp unit clamps the screen mask in a state where the front side of the screen printing apparatus exceeds the predetermined range in the orthogonal direction or the rear side of the screen printing apparatus exceeds the predetermined range. Screen printing device configured to be movable to at least one side.
The screen printing apparatus according to any one of claims 1 to 3,
Before the screen printing is performed, the control device includes the position of the screen mask clamped by the movable clamp unit in the mask clamp unit in the orthogonal direction and the substrate clamped by the substrate clamp unit. A screen printing apparatus that moves the movable clamp unit in a state in which the screen mask is clamped so that the positional deviation from the position in the orthogonal direction is eliminated.
A screen printing apparatus according to any one of claims 1 to 4,
As the screen mask, a mask without a frame in which the mask plate is not surrounded by a frame is used,
The control device operates the movable clamp unit so that a pulling force in the orthogonal direction acts on the mask without the frame during the screen printing.
A screen printing apparatus according to any one of claims 1 to 5,
The control device is configured to move the screen mask so that the screen mask slightly vibrates in a state where the screen mask is clamped by the movable clamp unit among the mask clamp units after the screen printing is performed. Operate screen printing device.
The screen printing apparatus according to claim 1, wherein the screen printing is performed a plurality of times on one substrate.
As the screen mask, a mask in which a plurality of print patterns having different shapes for the plurality of screen printings are provided in the orthogonal direction in one mask plate is used.
The control device is necessary for the screen printing of the plurality of print patterns in a state where the screen mask is clamped by the movable clamp unit of the mask clamp unit before the screen printing is performed. A screen printing apparatus for moving the movable clamp unit so that a printed pattern is positioned on the substrate.
The screen printing apparatus according to any one of claims 1 to 7,
The pair of substrate clamp units is configured such that one is fixed so as not to move and the other is movable in the orthogonal direction.
The mask clamp unit includes a pair of fixed clamp units fixed to positions outside the fixed substrate clamp unit in the orthogonal direction and the substrate clamp movable in the orthogonal direction. A screen printing apparatus comprising: the pair of movable clamp units that are movable within the predetermined range including a position that is outside the unit with respect to the substrate.