JP6946286B2 - Screen printing device - Google Patents

Description

The present invention relates to a screen printing apparatus.

Conventionally, there has been known a screen printing apparatus for performing screen printing by fixing a mask frame to which a screen mask is attached on a substrate (see, for example, Patent Document 1). In this screen printing device, the position of the mask frame receiver that receives the mask frame is adjusted by the width adjusting device to eliminate the misalignment of the screen mask.

Japanese Unexamined Patent Publication No. 2011-230353

By the way, in such a screen printing apparatus, screen masks (mask frames) of a plurality of sizes having different widths may be used according to the size of the substrate. In order to cope with such a change in the width of the screen mask, an attachment adapter prepared for each size may be attached to the mask frame holder. In that case, not only the number of attachment adapters prepared for each size is prepared, but also the attachment adapter needs to be replaced every time the size is changed, which is troublesome. It is also conceivable to provide a mechanism for sliding the mask frame holder manually by the operator, but there is a risk that the width may be set incorrectly.

An object of the present invention is to appropriately cope with a change in the width of a screen mask by utilizing a width adjusting device included in the screen printing device.

The present invention has taken the following measures to achieve the above-mentioned main object.

The screen printing apparatus of the present invention
A screen printing device that performs screen printing using a screen mask.
At least a pair of mask holders capable of holding both ends of the screen mask in a predetermined direction,
An adjusting device that adjusts the position of the screen mask in the predetermined direction by operating the mask holder while holding the screen mask so as to move the mask holder in the predetermined direction.
With
The adjusting device operates to move the mask holder in the predetermined direction without the screen mask, so that the position of the mask holder is adjusted according to the width of the screen mask to be used in the predetermined direction. The gist is to change.

The screen printing device of the present invention includes an adjusting device that adjusts the position of the screen mask in a predetermined direction by operating the mask holder holding the screen mask to move it in a predetermined direction. Changes the position of the mask holder according to the width of the screen mask scheduled to be used in the predetermined direction by operating to move the mask holder in the predetermined direction in the absence of the screen mask. As a result, the device for adjusting the position of the screen mask in the predetermined direction can also be used to change the position of the mask holder according to the width of the screen mask in the predetermined direction. Therefore, it is not necessary to prepare a plurality of types of adapters according to the width of the screen mask or to manually move the mask holder, and it is possible to appropriately cope with the change in the width of the screen mask.

In the screen printing device of the present invention, the adjusting device includes a ball screw extending in the predetermined direction, a motor for rotating the ball screw, a holder slider connected to the mask holder and moved in the predetermined direction by rotation of the ball screw. It may be provided with an encoder that detects the amount of rotation of the motor. By doing so, the position of the mask holder in a predetermined direction can be accurately managed, so that it is possible to more appropriately respond to the change in the width of the screen mask.

The screen printing apparatus of the present invention includes a printing head for performing the screen printing, a rail extending in a direction orthogonal to the predetermined direction, and a rail slider moving on the rail, and the rail is the mask. The print head may be mounted on the rail slider so as to move in the predetermined direction together with the holder so as to be movable relative to the rail slider in the predetermined direction. In this way, even if the mask holder and the rail are moved in response to the change in the width of the screen mask, the print head can be moved in the direction orthogonal to the predetermined direction to perform screen printing.

In the screen printing apparatus of the present invention, as the screen mask, a mask with a frame in which a mask plate is surrounded by a frame is used, and the mask holder can come into contact with the frame from the predetermined direction, and the adjusting device. May hold the screen mask by operating the mask holder against the frame during the screen printing. In this way, the mask holder does not need to hold the screen mask (frame) from the lower surface side. Therefore, it is possible to prevent the mask holder from interfering with the print object arranged below the screen mask or the holding device for the print object.

In the screen printing apparatus of the present invention, as the screen mask, a frameless mask in which the mask plate is not surrounded by a frame is used, and the mask holder can be engaged with the edge of the mask plate without a frame. The adjusting device may hold the screen mask by operating the mask holder to pull the engaged mask plate in the predetermined direction during the screen printing. In this way, the frameless mask can be appropriately held by the adjusting device and the mask holder for screen printing.

It is a block diagram which shows the outline of the structure of the printing apparatus 10 of this embodiment. It is a perspective view which shows the structure of the printing part 30 and the position adjusting apparatus 40. It is a perspective view which shows the structure of the printing part 30 and the position adjusting apparatus 40. It is a perspective view which shows the structure of the XL axis adjustment apparatus 42. It is a perspective view which shows the structure of the Y-axis adjustment device 46. It is a block diagram which shows the electrical connection relationship of the control device 70 of a printing device 10. It is explanatory drawing which shows the mode that the position of a mask holder 16a, 16b is fine-tuned. It is explanatory drawing which shows the mode that the position of the mask holder 16a, 16b is changed. It is explanatory drawing which shows the state of holding the screen mask M. It is explanatory drawing which shows the state which holds the frameless mask Mfl.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing an outline of the configuration of the printing device 10 of the present embodiment, and FIGS. 2 and 3 are perspective views showing the configuration of the printing unit 30 and the position adjusting device 40. Further, FIG. 4 is a perspective view showing the configuration of the XL axis adjusting device 42, FIG. 5 is a perspective view showing the configuration of the Y axis adjusting device 46, and FIG. 6 is a perspective view showing the configuration of the control device 70 of the printing device 10. It is a block diagram which shows the electrical connection relationship.

The printing apparatus 10 of the present embodiment performs screen printing in which solder is pushed into the pattern holes formed in the rectangular screen mask M by a squeegee 31 and applied to the substrate S. Here, the Y direction in FIGS. 1 to 3 is the printing direction in which the squeegee 31 is moved, and is the front-back direction of the printing device 10. Further, the X direction in FIGS. 2 and 3 is the transport direction of the substrate S, and is the left-right direction of the printing apparatus 10. The printing apparatus 10 can use a plurality of types of screen masks M having different widths in the X direction (widths on the left and right), and is replaced by a screen mask M according to the size of the substrate S by an operator. Further, the printing apparatus 10 can use a screen mask M having a frame F around it (see FIGS. 2 and 3) and a mask without a frame F.

As shown in FIGS. 1 to 3, the printing apparatus 10 includes a base 12, a pair of housings 14 provided on the base 12 in the X direction, a substrate transport device 22 for transporting the substrate S, and a substrate. The positions of the side clamp device 23 that clamps the side surface of S, the backup device 24 that backs up the substrate S from the lower surface, the mask holder 16 that holds the screen mask M, the printing unit 30 that performs screen printing, and the mask holder 16. A position adjusting device 40 for adjusting is provided.

The substrate transfer device 22 includes a pair of belt conveyors 22a and 22b in the Y direction. The substrate transfer device 22 conveys the substrate S from the back to the front (X direction) of FIG. 1 by driving 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 clamps both sides of the substrate S in the Y direction by the pair of side clamps 23a and 23b by sliding the other side clamp 23b while the substrate S is conveyed by the substrate transfer device 22. .. The side clamp device 23 clamps the substrate S so that the upper surfaces of the side clamps 23a and 23b are at the same height as the upper surface of the substrate S. Further, the side clamp device 23 can be raised by an elevating device (not shown) until the substrate S in the clamped state comes into contact with the screen mask M.

The backup device 24 includes a backup table 25 that can be raised and lowered by a lifting device (not shown), and a plurality of backup pins 26 that are installed on the backup table 25. The backup device 24 backs up the substrate S from the lower surface by the backup pin 26 by raising the backup table 25 in a state where the substrate S is transported by the substrate transport device 22.

The mask holder 16 includes a pair of mask holders 16a and 16b in the X direction. Each of the mask holders 16a and 16b includes a substantially horizontal upper surface portion 16u, a substantially horizontal lower surface portion 16w facing the upper surface portion 16u, and a side surface portion 16v orthogonal to the upper surface portion 16u and the lower surface portion 16w. Further, inside the side surface portions 16v of the mask holders 16a and 16b, a plurality of clamp cylinders 17 are provided so as to project the piston rod toward the lower surface portion 16w. In the clamp cylinder 17, both ends of the screen mask M (frame F) in the X direction (predetermined direction) are projected from the piston rod with the screen mask M mounted on the lower surface portion 16w. Holds the screen mask M in a horizontal position by clamping the screen mask M.

The printing unit 30 moves the printing head 32 to which the squeegee 31 is attached so as to be able to move up and down in the Y direction to perform screen printing. In addition to the print head 32, the printing unit 30 includes a head guide rail 33, a head slider 34, a head side rail 35, a slide receiving unit 36, a head motor 37, and a belt 38. The head guide rail 33 is a pair of rails provided along the Y direction on the upper surface portions 16u of the mask holders 16a and 16b, and the head slider 34 can move in the Y direction on the rails. There is. The head-side rail 35 is a pair of rails provided on the lower surface of the print head 32 along the X direction. The slide receiving portion 36 is provided on the upper surface of the head slider 34 along the X direction, and is a pair of receiving portions that slidably receive each head side rail 35. The belt 38 is hung on a drive pulley 38a driven by a head motor 37 and a driven pulley 38b, and is for a head that moves on a head guide rail 33 on one side (left side in FIG. 2) in the X direction. It is connected to the slider 34. Therefore, when the belt 38 is rotated by the drive of the head motor 37, the print head 32 moves in the Y direction as the head slider 34 connected to the belt 38 moves in the Y direction. Further, the print head 32 is mounted on the head slider 34 so as to be relatively movable in the X direction via the head side rail 35 and the slide receiving portion 36. Therefore, the print head 32 can absorb the movement of the head slider 34 in the X direction accompanying the movement of the mask holders 16a and 16b in the X direction by the head side rail 35 and the slide receiving portion 36. Therefore, even if the head slider 34 moves in the X direction, the print head 32 can move in the Y direction without changing the position in the X direction.

The position adjusting device 40 includes an XL axis adjusting device 42 and a Y-axis adjusting device 46 mounted on the housing 14 on the left side in the X direction, and an XR axis adjusting device 44 and a driven adjusting device mounted on the housing 14 on the right side in the X direction. It is equipped with 48. The XL-axis adjusting device 42 and the XR-axis adjusting device 44 are provided at positions that are diagonally close to one side of the rectangular screen mask M, and the Y-axis adjusting device 46 and the driven adjusting device 48 are screen masks. It is provided at a position near the other diagonal of M.

As shown in FIG. 4, the XL axis adjusting device 42 includes an X-axis guide rail 50, an X-axis slider 51, a Y-axis guide rail 52, a Y-axis slider 53, a bearing 54, a holder connecting member 55, and the like. A ball screw 56, an X-axis motor 57, and a belt 58 are provided. The X-axis guide rail 50 is a pair of rails provided on the upper surface of the housing 14 along the X direction, and the X-axis slider 51 straddling the pair of rails can move in the X direction. .. The X-axis slider 51 moves in the X direction by the rotation of the ball screw 56 extending in the X direction. The Y-axis guide rail 52 is a rail provided on the upper surface of the X-axis slider 51 along the Y direction, and the Y-axis slider 53 can move in the Y direction on the rail. The holder connecting member 55 is a member having an inverted L-shaped cross section, and includes a side surface portion 55a connected to the side surface portion 16v of the mask holder 16a and an upper surface portion 55b extending substantially horizontally in the X direction from the upper end of the side surface portion 55a. Has. The bearing 54 is arranged between the Y-axis slider 53 and the upper surface portion 55b of the holder connecting member 55, and one of the inner and outer rings of the bearing 54 is fixed to the Y-axis slider 53 and the other is the holder connecting member 55. It is fixed to the upper surface portion 55b of. Therefore, since the Y-axis slider 53 and the holder connecting member 55 can rotate relative to each other, the holder connecting member 55 can move in the Y direction and can rotate relative to the X-axis slider 51 that moves in the X direction. It will be installed. The belt 58 is hung on a drive pulley 58a driven by an X-axis motor 57 and a driven pulley 58b connected to a ball screw 56. That is, the drive shaft of the X-axis motor 57 is connected to the ball screw 56 via the belt 58 (the pulleys 58a and 58b, respectively).

In this XL axis adjusting device 42, the ball screw 56 rotates with the rotation of the belt 58 driven by the X-axis motor 57, so that the X-axis slider 51 on which the holder connecting member 55 is mounted is moved in the X direction. , The mask holder 16a is moved in the X direction. In the present embodiment, the X-axis guide rail 50 and the ball screw 56 are arranged so that the movable amount of the X-axis slider 51 of the XL-axis adjusting device 42, that is, the maximum moving amount of the mask holder 16a in the X direction is about 100 mm. It is assumed that the Y-axis adjusting device 46 constitutes the X-axis guide rail 62 described later. Further, an encoder 57a (see FIG. 6) for detecting the amount of rotation is attached to the X-axis motor 57 of the XL axis adjusting device 42, and the X of the mask holder 16a is based on the detection value of the encoder 57a. The position of the direction can be controlled.

Since the XR axis adjusting device 44 is configured in the same manner as the XL axis adjusting device 42 and moves the mask holder 16b in the X direction, each component is similarly coded and detailed description thereof will be omitted. It is assumed that the encoder 57b (see FIG. 6) is attached to the rotating shaft of the X-axis motor 57 of the XR-axis adjusting device 44. Similar to the XL axis adjusting device 42, the XR axis adjusting device 44 is configured so that the maximum amount of movement of the mask holder 16b in the X direction is about 100 mm. Therefore, the distance between the mask holders 16a and 16b is about 200 mm between the narrowest case and the widest case, so that the width of the screen mask M that can be held by the mask holders 16a and 16b is from the minimum width Wmin. The maximum width is Wmax (Wmin + 200 mm). The numerical values of the movement amount and the interval are examples, and are not limited to these numerical values.

As shown in FIG. 5, the Y-axis adjusting device 46 includes a Y-axis guide rail 60, a Y-axis slider 61, an X-axis guide rail 62, an X-axis slider 63, a bearing 64, a holder connecting member 65, and the like. A ball screw 66 and a Y-axis motor 67 are provided. The Y-axis guide rail 60 is a pair of rails provided on the upper surface of the housing 14 along the Y direction, and the Y-axis slider 61 straddling the pair of rails can move in the Y direction. .. The Y-axis slider 61 moves in the Y direction by the rotation of the ball screw 66 extending in the Y direction. The X-axis guide rail 62 is a rail provided on the upper surface of the Y-axis slider 61 along the X direction, and the X-axis slider 63 can move in the X direction on the rail. The holder connecting member 65 is a member having an inverted L-shaped cross section, and is substantially horizontal to the side surface portion 65a connected to the side surface portion 16v of the mask holder 16 (here, 16a) and the upper end of the side surface portion 65a in the X direction. It has an extending upper surface portion 65b. The bearing 64 is arranged between the X-axis slider 63 and the upper surface portion 65b of the holder connecting member 65, and one of the inner and outer rings of the bearing 64 is fixed to the X-axis slider 63 and the other is the holder connecting member 65. It is fixed to the upper surface portion 65b of. Therefore, since the X-axis slider 63 and the holder connecting member 65 can rotate relative to each other, the holder connecting member 65 can move in the X direction and can rotate relative to the Y-axis slider 61 that moves in the Y direction. It will be installed. Further, the rotating shaft of the Y-axis motor 67 is connected to the ball screw 66 via a coupling.

In this Y-axis adjusting device 46, the ball screw 66 is rotated by driving the Y-axis motor 67, so that the Y-axis slider 61 on which the holder connecting member 65 is mounted is moved in the Y direction, and the mask holder 16a is moved in the Y direction. Move to. In the present embodiment, the Y-axis guide rail of the Y-axis adjusting device 46 is such that the movable amount of the Y-axis slider 61 of the Y-axis adjusting device 46, that is, the maximum moving amount of the mask holder 16a in the Y direction is about 100 mm. The 60 and the ball screw 66, and the XL-axis adjusting device 42 and the Y-axis guide rail 52 of the XR-axis adjusting device 44 are configured. Further, an encoder 67a (see FIG. 6) for detecting the amount of rotation is attached to the Y-axis motor 67 of the Y-axis adjusting device 46, and the Y of the mask holder 16a is based on the detection value of the encoder 67a. The position of the direction can be controlled.

Since the driven adjustment device 48 has the same configuration as the Y-axis adjustment device 46 except that it does not have a drive configuration such as a ball screw 66 or a Y-axis motor 67, detailed description of the configuration will be omitted. .. As described above, the XL axis adjusting device 42, the XR axis adjusting device 44, the Y axis adjusting device 46, and the driven adjusting device 48 have the mask holders 16a and 16b set in the X direction and the Y direction in predetermined ranges (about 100 mm), respectively. It is configured to be movable and rotatable within a predetermined angle range (for example, about ± 2 degrees).

In addition to this, as shown in FIG. 6, the printing device 10 includes a touch panel type display operation panel 18, a mark camera 19 that captures various marks, and a control device 70 that controls the entire device. The display operation panel 18 displays various information and accepts input operations from the operator. The operator selects and inputs the type of screen mask M to be used, and inputs the width of the screen mask M to be used in the X direction (interval between mask holders 16a and 16b) through the display operation panel 18. To do. The mark camera 19 is, for example, moved between the substrate S and the screen mask M in a state where the substrate S is conveyed by the substrate conveying device 22, and is provided on the substrate mark and the screen mask M provided on the substrate S. It is configured to be able to image the mask mark.

As shown in FIG. 6, 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. The control device 70 includes operation signals from the display operation panel 18, mark images captured by the mark camera 19, encoders 57a and 57b of the XL axis adjustment device 42, the XR axis adjustment device 44, and the Y axis adjustment device 46. A rotation amount detection signal or the like from 67a is input. On the other hand, from the control device 70, a drive signal to the clamp cylinder 17, a display signal to the display operation panel 18, an image pickup instruction signal to the mark camera 19, a drive signal to the substrate transfer device 22, and a drive to the side clamp device 23. Signal, drive signal to backup device 24, drive signal to printing unit 30, drive signal to XL axis adjustment device 42 and XR axis adjustment device 44 (each X-axis motor 57), Y-axis adjustment device 46 (Y-axis) A drive signal or the like to the motor 67) is output.

The control device 70 generates a drive signal based on the mask width when the type of the screen mask M is selected or input or the width of the screen mask M in the X direction is input via the display operation panel 18. Is output to the XL axis adjusting device 42 and the XR axis adjusting device 44. Further, when each mark image is input from the mark camera 19, the control device 70 calculates the amount of deviation in the X direction, the Y direction, and the rotation direction when the substrate S and the screen mask M are overlapped, and each deviation amount. The amount of automatic adjustment of the mask holders 16a and 16b in the X direction, the Y direction, and the rotation direction by the position adjusting device 40 is calculated based on the above. Then, the control device 70 generates a drive signal based on these automatic adjustment values and outputs the drive signal to the XL axis adjustment device 42, the XR axis adjustment device 44, and the Y axis adjustment device 46.

Next, the operation of the printing apparatus 10 of the present embodiment configured in this way will be described. In particular, the operation when the printing device 10 finely adjusts the position of the screen mask M (correction based on the automatic adjustment value) and the operation when the screen mask M having a different width is replaced will be described.

FIG. 7 is an explanatory view showing how the positions of the mask holders 16a and 16b are finely adjusted. As shown in FIG. 7A, the position adjustment of the screen mask M is performed in a state where the screen mask M is set in the mask holders 16a and 16b. The screen mask M is held by the clamp cylinder 17. In this state, the control device 70 sends a drive signal to the XL axis adjusting device 42 and the XR axis adjusting device 44 so as to move the mask holder 16a to the left side in the drawing and the mask holder 16b to the left side in the drawing, for example. Is output. As a result, the control device 70 can finely adjust the position of the screen mask M to the left side in the X direction as shown in FIG. 7 (b). In this way, the control device 70 synchronizes the movement of the mask holder 16a by the XL axis adjusting device 42 and the movement of the mask holder 16b by the XR axis adjusting device 44 in the same direction by the same amount, thereby performing the screen. The mask M can be translated in the X direction.

Further, in the state of FIG. 7A, the control device 70 moves the mask holder 16a to the right side in the drawing and the mask holder 16b to the left side in the drawing, so that the XL axis adjusting device 42 and the XR axis are moved. The drive signal to the adjusting device 44 is output, and the driving signal to the Y-axis adjusting device 46 is output so as to move the mask holder 16a to the upper side in the drawing. As a result, the control device 70 can rotate and move the screen mask M as shown in FIG. 7 (c). In this way, the control device 70 moves the mask holder 16a by the XL axis adjusting device 42 and the mask holder 16b by the XR axis adjusting device 44 by the same amount in opposite directions, and the Y axis adjusting device 46. By synchronously moving the mask holder 16a according to the above method, the screen mask M can be rotated and moved. Although not shown, the control device 70 translates the screen mask M in the Y direction by outputting a drive signal to the Y-axis adjusting device 46 so as to move the mask holder 16a in the Y direction. be able to. In this way, the control device 70 drives the position adjusting device 40 in a state where the mask holders 16a and 16b hold the screen mask M, so that the positions of the screen mask M in the X direction, the Y direction, and the rotation direction can be changed. Fine adjustment is possible. Such fine adjustment is performed, for example, in a range of about ± 10 mm in the X direction and the Y direction and about ± 2 degrees in the rotation direction. Therefore, the maximum movement amount of each device of the position adjustment device 40 (for example, about 100 mm in the X direction) is an amount that greatly exceeds the range required for fine adjustment. Although the maximum movement amount in the X direction and the Y direction is the same amount, they may be different amounts, and the maximum movement amount in the Y direction is made smaller than the maximum movement amount in the X direction to be about the amount required for fine adjustment. May be good.

On the other hand, FIG. 8 is an explanatory view showing how the positions of the mask holders 16a and 16b are changed. FIG. 8 shows a state in which the wide screen mask M1 is replaced with the narrow screen mask M2. As shown in FIG. 8B, the control device 70 moves, for example, the mask holder 16a to the right side in the drawing and the mask holder 16b to the left side in the drawing in a state where the screen mask M is removed. It outputs a drive signal to the XL axis adjusting device 42 and the XR axis adjusting device 44. As a result, the control device 70 can change the positions of the mask holders 16a and 16b to narrow the interval. The control device 70 can reliably set the screen mask M2 by setting the distance between the mask holders 16a and 16b according to the width of the screen mask M2 (see FIG. 8C). The control device 70 outputs a drive signal to the XL axis adjusting device 42 and the XR axis adjusting device 44 so as to move the mask holder 16a to the left side in the drawing and the mask holder 16b to the right side in the drawing. Therefore, the distance between the mask holders 16a and 16b can be widened. As described above, in the state where the screen mask M is removed, the control device 70 sets the movement of the mask holder 16a by the XL axis adjusting device 42 and the movement of the mask holder 16b by the XR axis adjusting device 44 in opposite directions. As a result, the distance between the mask holders 16a and 16b can be widened or narrowed, so that the width can be automatically set according to the screen mask M to be used. Further, the encoders 57a and 57b can accurately control the positions of the mask holders 16a and 16b in the X direction and set them to an appropriate width. Therefore, as compared with the case where the printing device 10 is provided with a mechanism for manually changing the width, it is possible to prevent an error in setting the width. Further, as compared with the case where the printing device 10 is configured to attach the attachment adapter to the mask holder 16 according to the width of the screen mask M, it is not necessary to prepare a plurality of attachment adapters.

Here, the correspondence between the main elements of the present embodiment and the main elements of the invention described in the disclosure column of the invention will be described. That is, the mask holders 16a and 16b of the present embodiment correspond to the mask holder of the present invention, and the XL axis adjusting device 42 and the XR axis adjusting device 44 correspond to the adjusting device. Further, the ball screw 56 corresponds to the ball screw, the X-axis motor 57 corresponds to the motor, the X-axis slider 51 and the holder connecting member 55 correspond to the holder slider, and the encoders 57a and 57b correspond to the encoder. Further, the print head 32 corresponds to the print head, the head guide rail 33 corresponds to the rail, the head slider 34 corresponds to the rail slider, and the head side rail 35 and the slide receiving portion 36 indicate that the print head is It corresponds to the configuration of "mounted on the rail slider so as to be movable relative to the rail slider in a predetermined direction".

The printing apparatus 10 of the present embodiment described above is an XL that adjusts the position of the screen mask M in the X direction by operating the mask holders 16a and 16b while holding the screen mask M so as to move them in the X direction. The axis adjusting device 42 and the XR axis adjusting device 44 are provided. The XL axis adjusting device 42 and the XR axis adjusting device 44 move the mask holders 16a and 16b in the X direction without the screen mask M (at least the mask holders 16a and 16b do not hold the screen mask M). Therefore, the positions (intervals) of the mask holders 16a and 16b can be changed according to the width of the screen mask M scheduled to be used in the X direction. As a result, the device that adjusts the position of the mask holder 16 in the X direction is also used to change the position of the mask holder 16 according to the width of the screen mask M in the X direction, and appropriately responds to the change in the width of the screen mask M. be able to.

Further, the XL-axis adjusting device 42 and the XR-axis adjusting device 44 are configured to move the mask holders 16a and 16b in the X direction by moving the X-axis slider 51 by driving the X-axis motor 57, and the X-axis. The encoders 57a and 57b for detecting the amount of rotation of the motor 57 are provided. Therefore, since the position of the mask holder 16 in the X direction can be managed accurately, it is possible to more appropriately cope with the change in the width of the screen mask M.

Further, in the printing apparatus 10, the head guide rail 33 of the printing unit 30 is configured to move in the X direction together with the mask holders 16a and 16b, and the printing head 32 is headed by the head side rail 35 and the slide receiving unit 36. It can move relative to the slider 34 in the X direction. Therefore, even if the guide rail 33 for the head moves as the width of the screen mask M is changed, the print head 32 can be moved in the Y direction to perform screen printing.

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

For example, in the above-described embodiment, the mask holder 16 includes the clamp cylinder 17, but the present invention is not limited to this. Here, FIG. 9 is an explanatory diagram showing how the screen mask M is held. In the embodiment, as shown in FIG. 9A, the lower surface portion 16w functions as a mask receiver, and the clamp cylinder 17 clamps the screen mask M to hold the screen mask M. On the other hand, FIG. 9B shows a modified example in which the clamp cylinder 17 is not provided. The mask holder 160 has a side surface portion 160v capable of contacting the screen mask M (frame F) from the X direction. Therefore, the control device 70 operates the XL axis adjusting device 42 and the XR axis adjusting device 44 so as to press the side surface portions 160v of the mask holder 160 (160a, 160b) against the frame F of the screen mask M during screen printing. As a result, the screen mask M can be held. In this way, the mask holder 160 of the modified example can omit the lower surface portion 16w and the clamp cylinder 17 that function as a mask receiver. Therefore, in the modified example, it is not necessary to avoid the interference between the side clamps 23a and 23b and the lower surface portion 16w, so that it is not necessary to increase the screen mask M in order to prevent the interference with the side clamps 23a and 23b. As a result, in the modified example shown in FIG. 9B, the width of the screen mask M with respect to the substrate S having the same width can be narrowed as compared with FIG. 9A.

In the above-described embodiment, the screen mask M with the frame F has been used, but a screen mask without the frame F (frameless mask Mfl) may be used. Here, FIG. 10 is an explanatory diagram showing how the frameless mask Mfl is held. As shown in FIG. 10A, the frameless mask Mfl has a plurality of (predetermined number, for example, three) through holes H formed in the vicinity of both edges in the X direction. Further, the mask holders 160a and 160b of the modified example are configured so that the lower surface portion 160w can be attached to the lower end of the side surface portion 160v by a bolt or the like (not shown). On the upper surface of the lower surface portion 160w, a plurality of (predetermined number, for example, three) removable pins 160p are provided at positions corresponding to the formation intervals of the through holes H of the frameless mask Mfl. The control device 70 operates the XL axis adjusting device 42 and the XR axis adjusting device 44 to change the positions of the mask holders 160a and 160b so that the pins 160p fit into the through holes H of the frameless mask Mfl. do. Then, as shown in FIG. 10B, the frameless mask Mfl is attached to the mask holders 160a and 160b by fitting the through hole H into the pin 160p by the operator. Further, during screen printing, the control device 70 operates the XL axis adjusting device 42 and the XR axis adjusting device 44 in the direction in which the mask holders 160a and 160b are moved away from each other to apply tension to the screen mask Mfl to make the screen mask. Mfl can be retained. Thereby, the frameless mask Mfl can be appropriately held and screen printing can be performed. The frameless mask Mfl is not limited to the one using the pin 160p, as long as it can engage the mask holder 160.

In the above-described embodiment, the pair of mask holders 16a and 16b are both movable, but the present invention is not limited to this, and one of the pair of mask holders 16a and 16b may be movable and the other may be immovable. Further, although a pair of mask holders 16 are provided in the X direction, a plurality of pairs of mask holders 16 may be provided in the X direction.

In the above-described embodiment, the XL-axis adjusting device 42 and the XR-axis adjusting device 44 use the X-axis motor 57 to move the mask holder 16 in the X direction, but the present invention is not limited to this. For example, the mask holder 16 may be moved in the X direction by another electric actuator such as an electric cylinder or a hydraulic or pneumatic actuator. Further, although the rotation is transmitted from the X-axis motor 57 to the ball screw 56 via the belt 58, it may be transmitted via the coupling as in the Y-axis adjusting device 46. Further, the position adjusting device 40 may not include the adjusting device in the Y direction (Y-axis adjusting device 46, driven adjusting device 48). In that case, the XL-axis adjusting device 42 and the XR-axis adjusting device 44 may not be provided with the Y-axis guide rail 52, the Y-axis slider 53, or the like.

In the above-described embodiment, in order to allow the print head 32 and the head slider 34 to move relative to each other in the X direction, a head-side rail 35 is provided on the lower surface of the print head 32 and a slide receiving portion is provided on the head slider 34. 36 is provided, but the present invention is not limited to this. For example, a rail extending in the X direction may be provided on the slider 34 for the head, and a slide receiving portion may be provided on the lower surface of the print head 32.

In the above-described embodiment, the guide rail 33 for the head for moving the print head 32 in the Y direction is provided on the upper surface portion 16u of the mask holder 16 and moves in the X direction, but the present invention is not limited to this. No. For example, the guide rail for the head may be provided on a rail base fixed to the housing 14 and may not move in the X direction. In that case, the printing unit 30 may not include the head-side rail 35 and the slide receiving unit 36.

The present invention can be used in the manufacturing industry of printing equipment and the like.

10 printing equipment, 12 bases, 14 housings, 16, 16a, 16b, 160a, 160b mask holder, 16u top surface, 16v, 160v side surface, 16w, 160w bottom surface, 17 clamp cylinder, 18 display operation panel, 19 Mark camera, 22 board 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 printing head, 33 head Guide rail, 34 head slider, 35 head side rail, 36 slide receiver, 37 head motor, 38 belt, 38a drive pulley, 38b driven pulley, 40 position adjustment device, 42 XL axis adjustment device, 44 XR axis adjustment Equipment, 46 Y-axis adjustment device, 48 driven adjustment device, 50 X-axis guide rail, 51 X-axis slider, 52 Y-axis guide rail, 53 Y-axis slider, 54 bearing, 55 holder connecting member, 55a side surface, 55b top surface , 56 ball screw, 57 X-axis motor, 57a, 57b encoder, 58 belt, 58a drive pulley, 58b driven pulley, 60 Y-axis guide rail, 61 Y-axis slider, 62 X-axis guide rail, 63 X-axis slider, 64 bearing , 65 holder connecting member, 65a side surface, 65b top surface, 66 ball screw, 67 Y-axis motor, 67a encoder, 70 controller, 71 CPU, 72 ROM, 73 HDD, 74 RAM, 75 input / output interface, 76 bus, 160p pin, F frame, H through hole, M, M1, M2 screen mask, Mfl frameless mask, S substrate.

Claims (5)

A screen printing device that performs screen printing using a replaceable screen mask.
At least a pair of mask holders capable of holding both ends of the screen mask in a predetermined direction,
An adjusting device that adjusts the position of the screen mask in the predetermined direction by operating the mask holder while holding the screen mask so as to move the mask holder in the predetermined direction.
A print head for performing the screen printing and
A rail extending in a direction orthogonal to the predetermined direction,
A rail slider that moves on the rail and
With
The adjusting device is provided with a motor for moving the mask holder in the predetermined direction for each of the pair of mask holders, and in the absence of the screen mask, the motor is used with one of the pair of mask holders. By operating to move the other of the pair of mask holders in opposite directions, the position of the mask holder is changed according to the width of the screen mask to be used in the predetermined direction .
The rail is configured to move in the predetermined direction together with the mask holder.
The print head is a screen printing device mounted on the rail slider so as to be relatively movable in the predetermined direction with respect to the rail slider. A screen printing device that performs screen printing using a replaceable screen mask.
At least a pair of mask holders capable of holding both ends of the screen mask in a predetermined direction,
An adjusting device that adjusts the position of the screen mask in the predetermined direction by operating the mask holder while holding the screen mask so as to move the mask holder in the predetermined direction.
A print head for performing the screen printing and
A rail extending in a direction orthogonal to the predetermined direction,
A rail slider that moves on the rail and
With
The adjusting device operates to move the mask holder in the predetermined direction without the screen mask, so that the position of the mask holder is adjusted according to the width of the screen mask to be used in the predetermined direction. Change and
The rail is configured to move in the predetermined direction together with the mask holder.
The print head is a screen printing device mounted on the rail slider so as to be relatively movable in the predetermined direction with respect to the rail slider. The screen printing apparatus according to claim 1 or 2.
The adjusting device detects a ball screw extending in the predetermined direction, a motor for rotating the ball screw, a holder slider connected to the mask holder and moving in the predetermined direction by the rotation of the ball screw, and a rotation amount of the motor. A screen printing device equipped with an encoder. The screen printing apparatus according to any one of claims 1 to 3.
As the screen mask, a mask with a frame in which the mask plate is surrounded by a frame is used.
The mask holder can come into contact with the frame from the predetermined direction.
The adjusting device is a screen printing device that holds the screen mask by operating the mask holder against the frame during the screen printing. The screen printing apparatus according to any one of claims 1 to 4.
As the screen mask, a frameless mask in which the mask plate is not surrounded by a frame is used.
The mask holder can be engaged with the edge of the mask plate without a frame.
The adjusting device is a screen printing device that holds the screen mask by operating the mask holder to pull the engaged mask plate in the predetermined direction during the screen printing.

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