JP5091286B2 - Screen printing machine - Google Patents

Description

  The present invention relates to a screen printing machine, and more particularly to an improvement in the overall configuration.

  In a screen printing machine, cream solder is printed on a circuit board held by a board holding device through a screen. Conventionally, various means have been taken to improve print quality. For example, in the screen printing machine described in Patent Document 1 below, an imaging device and a cleaning device are provided. The reference mark provided on the circuit board is imaged by the imaging unit of the imaging device, and based on the imaging data, the positional deviation in the direction parallel to the conveyance direction of the circuit board by the substrate conveyance device, in the plane parallel to the circuit board In the direction perpendicular to the board conveyance direction and the rotational position deviation about the axis perpendicular to the circuit board are obtained, and the position deviation correction device corrects the position deviation by moving and rotating the circuit board. Cream solder is printed with high precision at the print location. Also, the cream solder adhered to the substrate contact surface side of the screen is removed by the cleaning unit of the cleaning device, and the cream solder printed on the circuit board is prevented from being chipped or cracked.

  Therefore, in the screen printing machine described in Patent Document 1, the imaging device and the cleaning device are in a state where the circuit board positioned by the positioning device and the screen fixed by the screen fixing device are separated from each other in a direction perpendicular to the screen. It is provided so as to be movable in a space formed between the two. In this space, a pair of guide rails are provided parallel to the substrate transport direction and arranged in the vertical direction, and a cleaning unit is mounted on one of the two movable members guided by the guide rails, The cleaning device is configured with the cleaning movable member, and the imaging unit is mounted on the other movable member, and the imaging device is configured with the movable member. The two movable members are respectively moved in the substrate transport direction by the moving device, whereby the cleaning unit and the imaging unit are moved to perform cleaning and imaging. The cleaning device and the imaging device share a guide rail and move in a common space. Therefore, both end portions of the guide rail are extended to positions away from the screen and the circuit board, and two retreat areas are provided, and the positions where the imaging device and the cleaning device do not interfere with the contact between the circuit board and the screen, respectively. Can be evacuated. The two evacuation areas are also retracted to one of the two evacuation areas when the reference mark is imaged by the imaging unit, and when the screen is cleaned by the cleaning part, the imaging unit is evacuated to the other evacuation area. , Also plays a role of not disturbing each other's work.

Japanese Patent Laid-Open No. 2003-260781

However, the screen printer described in Patent Document 1 has various problems. For example, since the retracting areas for the cleaning device and the imaging device are provided at both ends of the common guide rail, the width of the screen printer, that is, the dimension in the substrate transport direction is increased. In addition, when the screen printer is combined with other work machines to form a work line, if the work machines are arranged on both sides of the screen printing machine in the substrate transport direction, the work machines are hindered by the imaging device and There is also a problem that it is difficult to perform maintenance work on the cleaning device. Furthermore, the movement of the imaging device and the cleaning device is guided by a common guide rail, but since the moving devices are provided for each, two moving devices are concentrated in the vicinity of the moving space, and the configuration of the screen printing machine is It becomes partly complicated and the degree of freedom of design is low.
The present invention has been made against the background of the above circumstances, and the circuit board held by the substrate holding device and the screen held by the screen holding device are separated in a direction perpendicular to the screen. In the space formed between them, when the two working devices are moved in the direction parallel to the screen, and the work is performed, the above-mentioned problem related to the arrangement of the guides of the working devices or other than these The problem is to solve at least one of the problems.

In order to solve the above problems, the present invention provides (A) a substrate holding device for holding a circuit board, (B) a screen holding device for holding a screen, and (C) moving along the screen, A squeegee device that prints cream solder on the circuit board held by the substrate holding device through the screen, and (D) a substrate transfer device that carries the circuit board into and out of the substrate holding device, E) a screen printing machine including the substrate holding device, the screen holding device, the squeegee device, and a frame that supports the substrate transfer device; and (F) a substrate transfer direction of the substrate transfer device parallel to the screen. A cleaning guide fixed to the frame in a posture extending in the front-rear direction perpendicular to the left-right direction, and (G) the substrate holding device and the screen holding device are separated from each other. And (a) at least a wiping sheet supply shaft on which the wiping sheet is wound and a wiping sheet winding shaft for winding the wiping sheet are provided. A cleaning unit that wipes and cleans the surface of the screen held by the screen holding device on the side of the substrate holding device by a wiping sheet extending between the wiping sheet supply shaft and the wiping sheet winding shaft; ) retains its cleaning portion is guided to the cleaning guide, said wiping sheet supply shaft and the wiping sheet winding shaft move can in a direction perpendicular to the cleaning movable member, (c) a cleaning device comprising a moving device for cleaning unit for moving the cleaning movable member, disposed movably space formed by being moved away (H) and the substrate holding device said screen holding device and each other, (d) Hold on the substrate holding device. An imaging unit that images the held circuit board; (e) an imaging movable member that holds the imaging unit; and (f) an imaging unit moving device that moves the imaging movable member in a direction parallel to the screen. provided with an imaging device including bets, the planar shape of the frame, the center of the lateral direction of the front side, the depression toward the rear side, a shape having a recess having a width obtained contains the operator, before For each of the cleaning device and the imaging device, there is provided a retracting area in which the cleaning device and the imaging device do not hinder the mutual movement and the approach between the substrate holding device and the screen holding device, and the retreating the cleaning device for save area is a save area of the cleaning device in the region, Rutotomoni provided from the substrate holding device and the substrate transfer device to a position of the front side, to the cleaning device for save area It is characterized in that it has to be moved by the cleaning unit for mobile devices Kamon and the cleaning movable member is guided by the cleaning guide.

In the screen printing machine according to the present invention, the substrate transport device is supported by the frame in a posture extending in the left-right direction parallel to the screen and perpendicular to the front-rear direction. That is, this screen printing machine is scheduled to be installed on the left and right sides of the screen printing machine to constitute an electronic circuit assembly line. Therefore, if the retreat area of the cleaning device is set on the rear side of the screen printing machine, the operator needs to go around to the rear side of the screen printing machine every time maintenance of the cleaning device is required. If the clean printing machine is a component of the electronic circuit assembly line, it is necessary for the operator to go back to the electronic circuit assembly line, and maintenance work is difficult. Oh Ru. On the other hand, in the screen printing machine according to the present invention, the retreat area of the cleaning device is provided on the front side of the substrate holding device, and the cleaning unit is guided by the cleaning guide extending in the front-rear direction. Since the moving device is moved to the retreat area, the use of the retreat area as the maintenance area provides an effect that the worker can easily perform the maintenance work. In addition, a recess having a width that allows an operator to enter the front side of the frame is formed , and the wiping sheet supply shaft and the wiping sheet take-up shaft are laterally moved in the cleaning unit moved to the retreat area. Therefore , maintenance work can be performed particularly easily.

Aspects of the Invention

The following invention which is considered claimable (hereinafter referred to as "claimable invention". Claimable invention is the invention described in the claims subordinate the "present invention" Some aspects of the concept invention, the superordinate concept of the invention of the present application, or an invention of another concept) may be exemplified and described below. As with the claims, each aspect is divided into sections, each section is numbered, and is described in a form that cites the numbers of other sections as necessary. This is for the purpose of facilitating the understanding of the claimable invention, and is not intended to limit the combinations of the constituent elements constituting the claimable invention to those described in the following sections. In other words, the claimable invention should be construed in consideration of the description accompanying each section, the description of the embodiments, etc., and as long as the interpretation is followed, another aspect is added to the form of each section. In addition, an aspect in which constituent elements are deleted from the aspect of each item can be an aspect of the claimable invention.

(1) A screen printing machine for printing cream solder on a circuit board held by a board holding device through a screen held by the screen holding device,
A direction parallel to the screen in a space formed between the circuit board held by the substrate holding device and the screen held by the screen holding device in a state perpendicular to the screen. The first working device and the second working device are disposed so as to be movable, and a first fixed guide and a second guide for guiding the movement of the first working device and the second working device in a direction parallel to the screen, respectively. A screen printing machine in which a fixed guide extends in a direction parallel to the screen and perpendicular to each other.
A device for moving the first working device and the second working device can be provided apart from each other in a direction perpendicular to each other, and a device for independently moving the two working devices as in the screen printing machine in the prior art. Being able to concentrate on one place and solve the problem of low design freedom is an example of an effect that can be obtained by the configuration of this section, but it is not essential to obtain this effect .
(2) A first moving space and a second moving space, which are two spaces in which the first working device and the second working device move in a direction parallel to the screen, respectively, are perpendicular to and parallel to the screen. The screen printing machine according to the item (1), wherein at least a part thereof overlaps in any direction.
In the screen printing machine described in (1), it is not essential to overlap the first moving space and the second moving space in a direction perpendicular to the screen and in a direction parallel to the screen, but only in one of them. They may be combined, and both need not overlap. However, as in this section, if the first moving space and the second moving space are overlapped at least partially in a direction perpendicular to and parallel to the screen, the size of the screen printing machine can be reduced accordingly. Can do. However, in that case, it is necessary to provide a retreat area for each of the first work device and the second work device so that the mutual movement is not hindered.
Further, since the circuit board is brought into contact with the screen at the time of screen printing, the entire circuit board is necessarily overlapped with the screen in a direction parallel to the screen. If at least one of the circuit board held on the screen and the screen held on the screen holding device is a device that performs work, at least one of the first work space and the second work space that is each work space is When viewed from the direction perpendicular to the circuit board and the screen, they overlap. Further, it is necessary to provide a retreat area for each of the first and second working devices so that both devices can be in a state that does not hinder the contact between the circuit board and the screen. The first and second work spaces are often part of the first and second movement spaces, but may include a space outside the first and second movement spaces. For example, when the working device is an imaging device, not only the moving space of the imaging device itself, but also the space between the imaging device and the circuit board and the space between the imaging device and the screen are considered working spaces. The work space includes a space deviated from the moving space.
Each of the first and second work devices is guided by the first and second fixed guides and moves to the retreat area. Since the first and second fixed guides are provided at right angles to each other, for example, The retracting area of one working device is provided at a position away from the moving space of the other working device in the width direction of the screen printing machine, and the retracting area of the other working device is provided in the front-rear direction of the screen printing machine. The width of the screen printing machine can be reduced as compared with the conventional apparatus which can be provided at a position deviating from the moving space and has a retreat area for each apparatus at both ends in the width direction of the screen printing machine. In addition, the overall length of the production line including the printing press can thereby be reduced, and the productivity per unit area can be improved.
Furthermore, if the first moving space and the second moving space (strictly speaking, the first working space and the second working space) are overlapped with each other in the direction perpendicular to the circuit board and the screen, they are compared with the case where they are not overlapped. As a result, the distance between the circuit board and the screen can be reduced, and the screen printing machine can be reduced in size as described above, and the time required to bring them closer to and away from each other can be shortened, thereby improving work efficiency. it can. From this point of view, it is desirable that the amount of the “overlap of the first moving space and the second moving space in the direction perpendicular to the circuit board and the screen” is as large as possible, and the maximum separation distance between the circuit board and the screen is 40. % Or more, 60% or more, and preferably 80% or more.
(3) The screen printing according to (1) or (2), wherein the first fixed guide and the second fixed guide are separated from each other in a direction perpendicular to the screen and face each other. Machine.
Here, “face-to-face” means that the front directions of the two guides are the same when the first and second fixed guides are directed to the movement space of the working device guided by them, respectively. They are parallel and face each other.
It is also possible to provide the first fixed guide and the second fixed guide without being separated from each other in a direction perpendicular to the screen (in a common plane), in which case they are not facing each other. When the first fixed guide and the second fixed guide are provided in this way, both the guides themselves interfere with each other, and the working device guided by one of the two guides and the other guide interfere with each other. It is necessary to do so, which makes the screen printer large.
On the other hand, if the first and second fixed guides are provided so as to be separated from each other and face each other in the direction perpendicular to the screen as in this section, the two guides can be mutually viewed when viewed from the direction perpendicular to the screen. Both guides do not interfere with each other even when they are orthogonal, and at least a part of the first moving space and the second moving space can be overlapped in a direction perpendicular to the screen. It can be configured compactly.
(4) including a substrate transfer device that carries the circuit board into and out of the substrate holding device in the substrate transfer direction, and one of the first fixed guide and the second fixed guide is the The screen printing machine according to any one of items (1) to (3), wherein the screen printer is parallel to the substrate transport direction and the other is perpendicular to the substrate transport direction.
Both the first fixed guide and the second fixed guide can be provided in a direction crossing the substrate transport direction. However, in this case, in the screen printing machine, three movements that are parallel to the screen and have different directions are performed, which complicates the screen printing machine. According to the screen printing machine of this section, one movement direction of the first working device and the second working device is the same as the substrate transport direction, and the screen printing machine can be configured simply. As will be described later, the stop position of the circuit board can be defined by using one movement of the first working device and the second working device.
(5) The screen printing machine according to (4), wherein a first fixed guide for guiding the movement of the first working device parallel to the screen extends at right angles to the substrate transport direction.
(6) The substrate holding device holds the circuit board horizontally, and the first fixing guide retracts the first working device to at least one of the rear side and the front side of the substrate holding device. The screen printer according to item (5).
The first working device is retracted from the space between the circuit board held by the substrate holding device and the screen held by the screen holding device to at least one of the front side and the rear side of the space, However, since the retracting area is provided at the front or rear of the screen printing machine, the width of the screen printing machine is not increased. Even when other machines are installed on both sides in the width direction of the screen printing machine, it can be easily accessed by retracting the first working device to the front or rear of the clean printing machine. .
(7) The first working device can be moved in one direction parallel to the screen while holding the cleaning portion and cleaning the surface of the screen held by the screen holding device on the substrate holding device side. A screen printing machine according to any one of items (1) to (6), which is a cleaning device including a movable cleaning member.
In an embodiment in which this item is subordinate to item (6), if the retreat area of the cleaning device is provided on the front side of the substrate holding device, the maintenance area can be used as a maintenance area by using the retreat area as a maintenance area. As in the case where it is set on the rear side of the printing press, the maintenance work can be easily performed by approaching the cleaning device from the front side of the screen printing press without turning around to the rear side of the screen printing press. In an embodiment in which this item is subordinate to item (5), the imaging device is the first work device, the image pickup device is moved in a direction parallel to the screen and perpendicular to the substrate transport direction, the cleaning device is the second work device, and the substrate transport direction. However, when the cleaning device is moved in only one direction parallel to the screen and is a longitudinal device that cleans the entire screen at once, the cleaning device It moves only in the left-right direction of the screen printing machine and cannot move forward, making maintenance work difficult. On the other hand, the mode in which this item is subordinate to the item (6) is particularly effective for facilitating the maintenance work of the cleaning device having the above-described configuration.
For example, if the cleaning device is a device that applies solvent, wipes off dirt with a sheet, etc., it is necessary to periodically replenish the solvent and replace the sheet. It is particularly effective for the cleaning device that the number of times of maintenance often increases and the maintenance work is easy.
(8) The second working device captures at least one of a circuit board held by the substrate holding device and a screen held by the screen holding device, and an imaging movable holding the imaging unit An imaging apparatus comprising: a member; a movable guide for guiding the imaging movable member in a direction parallel to the screen and perpendicular to the substrate transport direction; and a moving device for moving the imaging movable member along the movable guide The screen printer according to (7), wherein the second fixed guide guides the movable guide in a direction parallel to the substrate transport direction.
The imaging device is used, for example, to image a reference mark provided on at least one of the circuit board and the screen, and based on the imaging data, the position of the solder printed portion of the circuit board and the opening filled with the cream solder on the screen Deviations can be acquired and corrected. The imaging device is also used for imaging the cream solder printed on the circuit board, and the printing results such as printing amount, printing position, printing shape, etc. are acquired, and if there is a printing defect, the viscosity of the cream solder is adjusted. And the like can be resolved. The imaging device is further used to image the opening of the screen. If there is cream solder adhesion, the adhesion should be eliminated by cleaning the screen, etc., so that the cream solder is properly printed on the circuit board. Can do.
The imaging unit can be moved in any direction parallel to the screen by a combination of the movement by the guide of the second fixed guide and the movement by the guide of the movable guide, and by moving to the front side of the screen printing machine, An operator can easily perform maintenance of the imaging unit. Therefore, in a mode in which this item is subordinate to item (6) and the retreat area of the cleaning device is provided on the front side of the substrate holding device, the image pickup unit of the image pickup device and the cleaning unit of the cleaning device are both screened. Maintenance work and the like can be easily performed by moving the printer to the front side.
(9) A position defining movable member that is guided by the movable guide and is movable in a direction perpendicular to the substrate transport direction;
The screen printing machine according to (8), further including a stop position defining device that includes a stop position defining unit that is held by the position defining movable member and that defines the stop position of the circuit board conveyed by the substrate conveying device.
The movable member for position definition in this section may be provided separately from the movable member for imaging which is guided by the movable guide and moves the imaging unit in a direction perpendicular to the substrate transport direction, or may be provided integrally. If provided integrally, a movable member moving device for moving the position defining movable member and the imaging movable member in a direction perpendicular to the substrate transport direction can be shared.
The stop position defining unit may be a device that defines the stop position by contacting the circuit board, such as the stop position defining unit described in (10), or the stop position defining unit described in WO 03/088730 It is good also as an apparatus which prescribes | regulates the stop position, without contacting a circuit board like a part. The non-contact type stop position defining unit includes a substrate detector that detects a predetermined detected portion of the circuit board conveyed by the substrate conveying device, and controls the movable guide moving device to move the substrate detector to a predetermined level. The stop position of the circuit board is controlled by moving to a position and controlling the substrate transfer device based on the detection result of the substrate detector at that position.
The stop position defining portion is moved in a direction parallel to the substrate transport direction by the movable guide being guided by the second fixed guide and moved in a direction parallel to the substrate transport direction. Therefore, for example, by previously placing the stop position defining portion at the stop position, the circuit board can be stopped at the stop position, or the stop position defining portion can be moved in the substrate transport direction in parallel with the transport of the circuit board. The stop position can be defined while restricting the movement of the circuit board.
In the screen printing machine of this section, the imaging device moving device can also serve as the stop position defining device moving device, and the configuration of the screen printing machine can be simplified.
A stop including a stop position defining portion for defining a stop position of the circuit board transported by the substrate transport apparatus, and a position defining movable member that holds the stop position defining portion and is movable in a direction parallel to the substrate transport direction. It can also be considered that the position defining device is one of the first working device and the second working device. It is not essential for the stop position defining portion to move in a direction parallel to the screen and perpendicular to the substrate transport direction. In that direction, the stop position defining position is constant, and the circuit board of the position defining movable member is fixed. It may be fixed at a position where the stop position can be defined and moved only in a direction parallel to the substrate transport direction.
The stop position defining device of this section can also be configured as a second working device that is different from the imaging device. In that case, the stop position defining unit and the perpendicularly movable member that holds the stop position defining unit And a movable guide for guiding the perpendicular movable member in a direction parallel to the screen and perpendicular to the substrate transfer direction, and a moving device for moving the perpendicular movable member along the movable guide, and a second fixed guide Is configured to guide the movable guide in a direction parallel to the substrate transport direction. The movable guide can be considered and configured in the same manner as the movable guide of the imaging apparatus, and a combination of the perpendicular direction movable member and the movable guide can be considered as the position defining movable member.
The stop position defining device of this section can also be considered as a second working device that shares the right-angle movable member, the movable guide, and the moving device with the imaging device.
The movement space of the stop position defining device is long in the direction parallel to the substrate transport direction, and when the stop position defining portion is moved in the direction perpendicular to the substrate transport direction, it is also long in the direction perpendicular to the substrate transport direction, When the movable member in the perpendicular direction is provided integrally with the movable member for imaging, it is included in the imaging device moving space or the same.
The features relating to the stop position defining device described in the items (9) to (12) can be employed independently of the features in the items (1) to (8).
(10) The stop position defining portion is
A stop position defining member that can move up and down in the vertical direction, contacts the downstream end in the transport direction of the circuit board at the lowered position, prevents the circuit board from being transported, and allows the circuit board to be transported at the raised position;
The screen printing machine according to item (9), further including a lifting drive device that lifts and lowers the stop position defining member to the raised position and the lowered position.
The feature of this section is particularly effective when the substrate transfer device is a device that transfers a circuit board by frictional force like a belt conveyor. This is because the movement of the substrate transfer device may be slightly larger than the movement of the circuit board defined by the stop position defining member, and it is not necessary to strictly control the operation of the substrate transfer device. In addition, since the stop position defining member exists between the circuit board that is transported first and the circuit board that is transported later, it is possible to reliably prevent one of the circuit boards from riding on the other. be able to.
(11) The substrate transport device is capable of transporting a circuit board in both forward and reverse directions, and the movable guide is connected to the forward position that defines the stop position of the circuit board that is transported in the forward direction by the stop position defining portion. The screen printing machine according to item (9) or (10), further including a movable guide moving device that moves the direction position and a reverse direction position that defines a stop position of the circuit board conveyed in the reverse direction.
Regardless of whether the circuit board is conveyed in the forward direction or the reverse direction, the stop position of the circuit board can be defined by the stop position defining unit.
(12) The screen printer according to (11), wherein the forward direction position and the backward direction position are programmable.
The stop position defining position of the stop position defining portion can be easily changed in accordance with the board conveyance direction and the dimensions of the circuit board.
(13) Including a main frame, the planar shape of the main frame is provided with a concave portion that is recessed toward the rear side and has a width that allows an operator to enter in the center portion in the left-right direction on the front side (1) Item 12. A screen printer according to any one of items (12) to (12).
From the front side of the screen printing machine, it is difficult to work on the device located behind the screen printing machine, such as the substrate holding device, the device provided behind the substrate holding device, but if a recess is provided, An operator can enter the concave portion and easily access a device provided on the rear side of the printing press to perform maintenance work and the like. In addition, the operation of the device provided on the front side of the screen printer becomes easier.
(14) A pair of the first and second fixed guides perpendicular to the substrate transport direction is provided, and each of the pair of guides extends to two protrusions protruding forward on both sides of the recess. The screen printer according to item (13), which is extended.
The working device including the movable member guided by the first and second fixed guides perpendicular to the substrate transport direction is held at two locations in the direction perpendicular to the moving direction, stably held, and moved. It is done. Moreover, since each of the pair of guides extends to two protrusions protruding forward on both sides of the recess, the working device guided by the guides is moved to a position corresponding to the recess. This makes it particularly easy for the worker to access the working device.
(15) A screen printing machine for printing cream solder on a circuit board held by a board holding device through a screen held by the screen holding device,
A direction parallel to the screen in a space formed between the circuit board held by the substrate holding device and the screen held by the screen holding device in a state perpendicular to the screen. The first working device and the second working device are disposed so as to be movable, and a first fixed guide and a second guide for guiding the movement of the first working device and the second working device in a direction parallel to the screen, respectively. A screen printing machine in which fixed guides are spaced apart from each other in a direction perpendicular to the screen and face each other.
The features described in each of the items (1), (2), (4) to (14) can be applied to the screen printer of this item.
The first fixed guide and the second fixed guide may extend in directions parallel to each other, or may extend in directions perpendicular to each other.
In the screen printing machine of this section, the first fixed guide and the second fixed guide do not interfere with each other, and the arrangement of both guides can be selected freely. Further, avoiding mutual interference between the first working device and the second working device guided by the first fixed guide and the second fixed guide, respectively, and a guide for guiding one of the two working devices and the other. One of the advantages is that it is easy to avoid interference. These advantages are particularly effective when the first fixed guide and the second fixed guide extend in directions perpendicular to each other, but are not essential.
(16) a substrate holding device for holding a circuit board;
A screen holding device for holding the screen;
A squeegee device that moves along the screen and prints cream solder on the circuit board held by the substrate holding device through the screen;
A screen printing machine including the substrate holding device, the screen holding device, and a frame that supports the squeegee device,
The screen printing machine characterized in that the planar shape of the frame is a shape having a recess recessed toward the rear side and having a width that can be entered by an operator at the center in the left-right direction on the front side. .
(17) A space formed by separating the substrate holding device and the screen holding device from each other is movably provided, and (a) the screen held by the screen holding device on the substrate holding device side is provided. A cleaning unit including a cleaning unit that cleans the surface, and (b) a cleaning movable member that holds the cleaning unit and is movable in one direction parallel to the screen;
The substrate holding device and the screen holding device are movably provided in a space formed by being separated from each other, and (c) the circuit board held by the substrate holding device and the screen holding device are held by the screen holding device. An imaging unit that images at least one of the screen, (d) an imaging movable member that holds the imaging unit, (e) a movable guide that guides the imaging movable member in a direction parallel to the screen, and (f An imaging device including a moving device that moves the imaging movable member along the movable guide, and each of the pair of fixed guides that guide the cleaning movable member or the imaging movable member is a front-rear direction. Further, the screen printing machine according to the item (16), which extends to two protrusions protruding forward on both sides of the recess.
(18) The pair of fixed guides extending in the front-rear direction are cleaning fixed guides that guide the cleaning movable member, and the front side of the frame and the rear side opposite to the front side The screen printing machine as set forth in (17), wherein a retreat area in which the cleaning device retreats is provided in order to allow the substrate holding device and the screen holding device to approach each other.
(19) The frame includes a main frame that supports the substrate holding device, and a subframe that is provided above the main frame and supports the screen holding device and the squeegee device, and the main frame includes the recess. The screen printer according to (18), wherein at least a part of the retreat area is provided above the recess.
(20) The two protrusions protruding forward on both sides of the recess are provided with storage portions for storing the maintenance tool of the screen printing machine facing the recess side. A screen printing machine according to any one of the above.
(21) The pair of cleaning fixed guides for guiding the cleaning movable member is extended in the front-rear direction by the frame, and the pair of imaging fixed guides for guiding the imaging movable member is the left-right direction. The screen printing machine according to the item (17), which is supported in a posture extending in a straight line.
(22) The cleaning fixing guide is suspended from the downward surface of the frame, the imaging fixing guide is below the cleaning fixing guide, and a part of the imaging fixing guide is the cleaning. The screen printing machine according to item (21), provided in a state of facing a part of the fixed guide for use.
(23) The screen printing machine according to any one of (16) to (22), further including a substrate transfer device that transfers the circuit board, wherein the substrate transfer device is supported in a posture extending in a left-right direction by the frame. .
(24) The squeegee fixed guide for guiding the movement of the squeegee device in a direction parallel to the screen is supported in a posture extending in the front-rear direction by the frame. The screen printing machine described.

It is a front view which shows schematically the screen printer which is one Example of claimable invention. It is a top view which shows the said screen printer roughly. It is a top view which shows roughly arrangement | positioning of the guide rail which guides the movement of the cleaning apparatus of the said screen printer, and the guide rail which guides the movement of an imaging device. It is a front view explaining duplication with the work space of the cleaning device of the above-mentioned screen printer, and the work space of an imaging device. It is a side view which shows schematically the board | substrate holding | maintenance apparatus of the said screen printer. It is a top view which shows roughly the board | substrate holding member and clamp member of the said board | substrate holding apparatus. It is a block diagram which shows roughly the control apparatus which controls the said screen printer. It is a figure explaining holding and release of a circuit board by the above-mentioned board holding device. It is a top view which shows schematically another aspect of the board | substrate holding | suppressing member and clamp member of a board | substrate holding apparatus. It is a top view which shows roughly still another aspect of the board | substrate holding | suppressing member and clamp member of a board | substrate holding apparatus.

  Hereinafter, embodiments of the claimable invention will be described in detail with reference to the drawings. In addition to the following examples, the claimable invention can be practiced in various modifications based on the knowledge of those skilled in the art, including the aspects described in the above [Aspect of the Invention] section. .

  FIG. 1 illustrates a screen printing machine as an embodiment of the claimable invention. The screen printing machine includes a frame 10, a substrate transfer device 12 (see FIG. 2), a substrate holding device 14, a screen holding device 16, a squeegee device 18, a cleaning device 20, an imaging device 22, and a control device 24 (see FIG. 7). I have. The frame 10 includes a main frame 28 and a subframe 30. As shown in FIG. 2, the main frame 28 includes a concave portion 32 that is recessed toward the rear side in the center portion in the left-right direction on the front side of the screen printing machine, and has a U-shape in plan view. The recess 32 has a width that allows an operator to enter, and the protrusions 34 are protruded forward on both sides of the recess 32. Each of the pair of protrusions 34 is provided with a storage portion 36. Each of the storage portions 36 is provided on the inner side of the projection 34 so as to face the concave portion 32. For example, the storage portions 36 are for maintenance peculiar to each of a plurality of devices constituting the screen printing machine such as the squeegee device 18 and the cleaning device 20. Contains tools and maintenance materials. As shown in FIGS. 1 and 2, the subframe 30 includes a plurality of columns 38 erected on the main frame 28.

  The substrate transfer device 12 is provided on the main frame 28 as shown in FIG. In this embodiment, the substrate transfer device 12 is constituted by a belt conveyor, and includes a carry-in conveyor 40, a main conveyor 42, and a carry-out conveyor 44. Each of these conveyors 40, 42, 44 includes a pair of endless conveyor belts 46 (see FIG. 4), a portion of each pair of conveyor belts 46 forming a horizontal and upward conveying surface 48 and in a row. Each of the pair of conveyor belts 46 is arranged side by side and is circulated by a belt circulator so that the circuit board 50 is oriented in a direction parallel to the solder printing surface in a posture in which the solder printing surface is horizontal. Transport horizontally. The board conveying device 12 can convey the circuit board 50 in the forward direction or the reverse direction in a direction parallel to the solder printing surface by changing the rotating direction of the conveyor belt 46. The conveyor belt 46 is a timing belt, for example. The belt circulator is, for example, a kind of electric rotary motor, and a belt circulator motor 52 (see FIG. 7) configured by a servo motor that is an electric rotary motor capable of accurately controlling the rotation angle is used as a drive source. In this case, the circumferential speed of the conveyor belt 46 can be controlled, and the substrate conveyance speed can be servo-controlled. The circumferential direction of the conveyor belt 46 is also controlled. The belt rotation motor 52 includes an encoder, the rotation angle of which is detected by the encoder, and the belt rotation motor 52 is controlled based on the detection result. In the present screen printer, the substrate transport device 12 is provided so that the substrate transport direction is parallel to the left-right direction of the screen printer. The left-right direction is the width direction of the screen printing machine. A direction parallel to the substrate conveyance direction is also referred to as an X-axis direction, and the substrate conveyance is performed in parallel with the solder printing surface on which the cream solder of the circuit board 50 (hereinafter referred to as the holding circuit board 50) held by the substrate holding device 14 is printed. A direction perpendicular to the direction is also referred to as a Y-axis direction. In this screen printing machine, the Y-axis direction is parallel to the front-rear direction or the depth direction.

  As shown in FIG. 2, the substrate holding device 14 is provided in a portion corresponding to the circuit board transfer area by the main conveyor 42 of the main frame 28. In this embodiment, as shown in FIG. 56 and the substrate clamp device 58, and the substrate holding device lifting / lowering device 60 lifts and lowers in the direction perpendicular to the solder printing surface of the circuit board 50 held by the substrate holding device 60 in the vertical direction in this embodiment. This up and down direction is also referred to as the Z-axis direction. In the present embodiment, the substrate support device 56 includes a pin support base to which a plurality of support pins and support pins are detachably attached, although detailed illustration is omitted. The support pin may be a holding pin that sucks and holds the circuit board 50 with a negative pressure. The substrate clamp device 58 includes a side clamp device 62 and a substrate pressing device 64.

  As shown in FIG. 5, the substrate holding device elevating device 60 includes an elevating table 70 as an elevating member provided on the main frame 28 so as to be movable up and down, and an elevating table lifting drive device 72. The lifting platform lifting / lowering drive device 72 includes a lifting platform lifting / lowering motor 74 as a drive source, a ball screw 76 which is a kind of feed screw, and a nut 78, while guiding the lifting platform 70 to a guide rail 80 as a guide. Move to any position in the vertical direction.

  The substrate support device 56 and the substrate clamp device 58 are provided on the lifting platform 70 via a misalignment correction device 84. Although the detailed illustration and description of the misalignment correcting device 84 is omitted, the correction moving base 86 as a correction moving member provided on the lifting / lowering base 70 and the correction moving base 86 with respect to the lifting / lowering base 70. And a correction moving table driving device 88 (see FIG. 7) that moves in the axial direction and the Y-axis direction and rotates around an axis parallel to the Z-axis direction.

  The substrate holding device 64 is provided on the correction moving table 86. As shown in FIG. 5, the substrate pressing device 64 has a pair of substrate pressing members 94. Each of the substrate pressing members 94 includes a moving member 96 and an elevation pressing member 98. The moving member 96 is guided by a guide rail 100 (only one of which is shown in FIG. 5) as a pair of guides provided on the correction moving base 86, and for example, a substrate pressing member using an air cylinder as a driving source. The member moving device 104 is moved in a direction parallel to the solder printing surface of the circuit board 50 (hereinafter referred to as the transport circuit board 50) transported by the main conveyor 42 and perpendicular to the board transport direction. Each of the substrate pressing portions 106 of the pair of lifting and lowering pressing members 98 is long in the substrate transport direction, has a pressing surface 108 that faces the transport circuit board 50 and faces downward, and the lifting and lowering pressing member 98 is lifted and lowered by the moving member 96. The fitting is possible, and the spring 110 which is a kind of biasing means is biased downward in a direction approaching the moving member 96. The limit of movement of the lifting and lowering pressing member 98 due to the bias of the spring 110 is defined by the stopper member 112 provided on the lifting and lowering pressing member 98 abutting against the moving member 96.

  Each of the opposing surfaces of the pair of substrate pressing portions 106 extends over the entire length of the substrate pressing portion 106 in a direction parallel to the substrate transport direction, as schematically shown in FIG. The curved surface 114 is gently curved into a convex shape composed of a multi-order function or a trigonometric function curve, and is inclined with respect to the longitudinal direction.

  As shown in FIG. 5, the side clamp device 62 and the side clamp device lifting device 120 are also provided on the correction moving table 86. The side clamp device lifting device 120 includes a lifting platform 122 and a lifting platform lifting drive device 124 as lifting members. The lifting platform lifting / lowering drive device 124 includes a lifting platform lifting / lowering motor 126 as a driving source, a ball screw 128, a nut 130, and a pair of cam members 132. The pair of cam members 132 are guided by guide rails 134 as guides. However, by being moved in a direction parallel to the solder printing surface of the transport circuit board 50 and perpendicular to the board transport direction, the slope of the cam surface 136 and the rolling element 138 as a cam follower provided on the lower surface of the lifting platform 122 is reduced. By the action, the lifting / lowering table 122 is guided by the guide rod 140 as a guide member constituting the guide device and is lifted / lowered with respect to the correction moving table 86.

  The side clamp device 62 is provided on the lifting platform 122. The side clamp device 62 includes a pair of clamp members 146. Each of the clamp members 146 includes a clamp part 147 that is long in the board conveyance direction, and the surfaces of the clamp part 147 that are opposed to each other are a perpendicular clamp surface 148 that is perpendicular to the solder printing surface of the conveyance circuit board 50. . One of the pair of clamp members 146 is a movable clamp member 146, and is guided by a guide rail 150 as a guide member provided on the lifting platform 122, and is soldered to the transport circuit board 50 by the clamp member moving device 152. It is moved in a direction parallel to the printing surface and perpendicular to the substrate transport direction. The other clamp member 146 is provided at a fixed position on the lifting platform 122 and is a fixed clamp member 146.

  The clamp member moving device 152 includes a clamp member moving motor 158 as a drive source, a ball screw 160, a nut 162, and a damper 164. The movable clamp member 146 is parallel to the solder printing surface of the circuit board 50 in the board transport direction. Based on the dimension data in the direction at right angles (if this direction is the width direction of the circuit board 50, the width dimension data is moved to the fixed clamp member 146 side). The damper 164 includes an air cylinder in this embodiment, and is engaged with the movable clamp member 146, and the movable clamp member 146 contacts the circuit board 50 by controlling the air pressure supplied to the air chamber. The force is adjusted or the circuit board 50 is released. Further, the nut 162 is engaged with the guide rail 150 by the engaging member 166 so as to be relatively movable in the longitudinal direction of the guide rail 150, thereby preventing rotation.

  A pair of conveyor belts 46 of the main conveyor 42 are provided on the mutually opposing surfaces of the pair of clamp members 146, respectively. Therefore, the main conveyor 42 is moved up and down by the substrate holding device lifting / lowering device 60 together with the substrate holding device 14, and is the lower end position of the substrate holding device 14, that is, the substrate holding position for holding the circuit board 50 and the rising end position. The substrate conveying position where the conveying surface 48 of the conveyor belt 46 of the main conveyor 42 is located in the same plane as the conveying surfaces 48 of the carry-in and carry-out conveyors 40 and 44 by raising and lowering between the contact position and the printing position, It is moved to a position above the substrate transfer position. Note that the surfaces of the clamp portions 147 of the pair of clamp members 146 that are opposite to each other and that face on the substrate pressing member 94 are curved corresponding to the curvature of the curved surface 114 as shown in FIG. The curved surface 170 has The curved surface 170 is gently curved in a concave shape over the entire longitudinal direction of the clamp portion 147.

  The substrate support device 56 and the substrate support device lifting device 180 are provided on the lifting platform 122. The substrate supporting apparatus lifting device 180 includes a lifting platform 182 and a lifting platform lifting drive 184 as lifting members. The lifting platform lifting / lowering drive device 184 includes a lifting platform lifting / lowering motor 186, a ball screw 188, and a nut 190 held by the lifting platform 122, and lifts the lifting platform 182 relative to the lifting platform 122. The guide rod 140 is attached to the lifting platform 182 and is fitted to the lifting platform 122 and the correction moving platform 86 so as to be relatively movable in the axial direction, and guides the lifting and lowering of the lifting platforms 122 and 182. The substrate support device 56 is provided on the lifting platform 182. Note that the lifting platform lifting / lowering motor 186 is provided so as not to hinder the movement of the correction moving platform 86 relative to the lifting platform 70.

  As shown in FIG. 1, the screen holding device 16 is provided on a support member 200 provided on the top of the column 38. The screen holding device 16 is provided above the substrate holding device 14. In this embodiment, the screen 204 is attached and detached from the front to the rear of the screen printer, and the screen 204 is parallel to the holding circuit substrate 50. It is supposed to be held horizontally. In this embodiment, the screen 204 has a size that can be used for a plurality of types of circuit boards 50 having different sizes, and an opening is formed in a portion corresponding to a solder print location of the circuit board 50. It is stretched on a rectangular screen frame, and is held by the screen holding device 16 in the screen frame. As schematically shown in FIG. 2, the holding circuit board 50 and the holding screen 204, which is the screen 204 held by the screen holding device 16, overlap each other in a direction parallel to them and are located at the lower end position. The holding circuit substrate 50 and the holding screen 204 held by the substrate holding device 14 are opposed to each other with a space formed between them being separated in a direction perpendicular to both of them. This space is referred to as a substrate-screen space.

  The squeegee device 18 is supported by a support member 200 as shown in FIG. In this embodiment, the squeegee device 18 is a release type, and a pair of squeegee heads 210 (only one is shown in FIG. 1), and a squeegee head lifting device 212 that lifts and lowers the squeegee heads 210 respectively. And a squeegee head moving device 214 that moves the squeegee head 210 in a direction parallel to the holding screen 204. Each of the pair of squeegee heads 210 includes a squeegee 216. The squeegee head moving device 214 includes a moving member 220 and a moving member driving device 221. The moving member driving device 221 includes a squeegee head moving motor 222 as a driving source and a feed screw mechanism 223 including a ball screw and a nut (see FIG. 7), and each of the moving members 220 serves as a pair of skis as a guide. It is moved while being guided by the guide rail 224 for the dihead. The squeegee head guide rails 224 are provided on the support member 200 in a state extending in a direction parallel to the holding screen 204 and perpendicular to the substrate transport direction, and a pair of squeegee heads 210 provided on the moving member 220 are As shown in FIG. 1, the space above the holding screen 204 is moved in the direction in which the squeegee head guide rail 224 extends. In this screen printing machine, the cream solder printing direction is parallel to the holding screen 204 and perpendicular to the substrate transport direction, and the squeegee head 210 is provided with the squeegee 216 parallel to the substrate transport direction. The squeegee head is lifted and lowered by a squeegee head lifting device 212 using an air cylinder as a drive source, and the squeegee 216 is brought into contact with and separated from the screen 204.

  The cleaning device 20 is provided on the support member 200 of the subframe 30. The cleaning unit 202, which is a main part of the cleaning device 20, is configured in the same manner as the cleaning unit of the cleaning device described in, for example, Japanese Patent Application Laid-Open No. 9-39214. It is the surface of the screen 204 held by the device 16 on the substrate holding device 14 side, and is disposed on the substrate contact surface side and the lower surface side with which the circuit board 50 is brought into contact. It is supposed to be wiped off. The cleaning unit 202 includes a wiping head as a cleaning head and a wiping head lifting device. The wiping head includes a wiping sheet supply shaft around which the wiping sheet is wound, a wiping sheet winding shaft for winding the wiping sheet, a pressing roller for pressing the wiping sheet against the screen 204, and a wiping sheet winding. A take-up shaft rotating device for rotating the shaft. The wiping head lifting / lowering device is configured using, for example, an air cylinder as a drive source. The wiping sheet has a belt shape and is wound around a pressing roller. The wiping head lifting device separates the wiping head from the contact position or cleaning position where the wiping sheet contacts the screen 204 and the screen 204. It is moved up and down to the separated position or the non-cleaning position. The winding shaft rotating device winds up the wiping sheet in conjunction with the lowering of the wiping head, and an unused clean part is positioned at the wiping position on the pressing roller instead of the dirty part.

  The cleaning unit 202 is held by a movable member 250 as a cleaning movable member, and constitutes the cleaning device 20 together with the movable member 250. The cleaning device 20 (directly the movable member 250) is guided by a pair of cleaning device guide rails 254 as first fixed guides. As shown in FIG. 1, each of these cleaning device guide rails 254 is a position on the lower surface of the support member 200, on the surface on the substrate holding device 14 side, separated from the substrate transport direction, and the substrate holding device 14. And provided outside the holding screen 204 in a state extending in a direction parallel to the holding screen 204 and perpendicular to the substrate transport direction. The pair of cleaning device guide rails 254 is provided above the substrate holding device 14 and in a suspended state at a position substantially the same height as the holding screen 204, as shown in FIGS. 2 and 3. As described above, the substrate holding device 14 is extended to the front of the screen printing machine, extends to the two protrusions 34 of the main frame 28, and is also extended to the rear side of the screen printing machine. A cleaning device retraction area 256 is provided on each of the front side and the rear side of the holding device 14.

  The movable member 250 is movably fitted to the cleaning device guide rails 254 at both ends in the longitudinal direction, and the portion between the portions supported by the guide rails 254 is on the substrate holding device 14 side, That is, it protrudes downward and the cleaning part 202 is mounted on the protruding part. The movable member 250 is driven by a cleaning device moving device 264 including a cleaning device moving motor 260 as a drive source and a feed screw mechanism 262 including a feed screw and a nut (see FIG. 7). It is moved along the guide rail 254. The cleaning device 20 is supported at both ends by the cleaning device guide rail 254, and the cleaning unit 202 moves below the cleaning device guide rail 254 and below the holding screen 204. The cleaning unit 202 is mounted on the movable member 250 in a posture in which the width direction of the wiping sheet is parallel to the holding screen 204 and perpendicular to the moving direction of the movable member 250, and the wiping sheet is moved along with the movement of the movable member 250. The substrate contact surface of the holding screen 204 is moved while being wiped simultaneously in a strip shape in a direction perpendicular to the moving direction of the movable member 250, and the entire substrate contact surface is cleaned at once.

  As shown in FIG. 1, the cleaning unit 202 has a holding screen 204 in a direction perpendicular to the cleaning device guide rail 254 (a direction parallel to the substrate transport direction) in a plane parallel to the holding circuit substrate 50 and the holding screen 204. As shown in FIGS. 1 and 3, the cleaning device moving space provided at the same position as the moving space of the cleaning device 20 has a width equal to the length of the movable member 250 in the direction parallel to the holding screen 204. Equally, it has a size that exceeds the substrate holding device 14 in the front-rear direction, and in a direction perpendicular to the holding screen 204, has a size that includes almost the entire space between the substrate and the screen. The cleaning device moving space is a space below the pair of cleaning device guide rails 254, and these guide rails 254 are provided downward. Moreover, the part corresponding to the holding screen 204 in the cleaning device moving space is the cleaning device working space.

  In the present embodiment, the imaging device 22 includes a CCD camera 280 as an imaging unit, a movable member 282 as an imaging movable member that holds the camera, and the movable member 282 that is parallel to the holding screen 204 and transports the substrate. A guide rail 284 as a movable guide for guiding in a direction perpendicular to the direction, a movable member 286 that holds the guide rail 284, and a moving device 290 that moves the movable member 282 along the guide rail 284 are included. However, it can be considered that the guide rail 284 and the movable member 286 jointly constitute a movable guide. The moving device 290 includes a movable member moving motor 292 and a feed screw mechanism 294 (see FIG. 7) including a feed screw and a nut. The movable member 282 is horizontally along the guide rail 284 and perpendicular to the substrate transport direction. Move in any direction. On the main frame 28, as shown in FIGS. 2 and 3, a pair of imaging device guide rails 296 as second fixed guides are respectively provided on the front side and the rear side of the screen printing machine of the substrate holding device 14. The imaging device guide rail 296 and the cleaning device guide rail 254 extend in a direction parallel to the holding screen 204 and perpendicular to each other. The pair of imaging device guide rails 296 are extended from the substrate holding device 14 to both the upstream side and the downstream side in the substrate transport direction, and are separated from the substrate holding device 14 on both sides in the substrate transport direction. An imaging device retreat area 298 is provided. As shown in FIGS. 1 and 4, the imaging device guide rail 296 is at a position substantially the same height as the circuit board 50 held by the substrate holding device 14 located at the lowered position, and is used for the cleaning device. The guide rails 254 and 296 are provided below the guide rails 254 and are separated from each other in a direction perpendicular to the holding screen 204.

  As described above, the cleaning device guide rail 254 is provided on the support member 200 in a suspended state, and is provided above the imaging device guide rail 296. In this embodiment, as shown in FIG. The part of the member 250 supported by the pair of cleaning device guide rails 254 is positioned above the movable members 282 and 286. Therefore, even if the portion of the movable member 250 supported by the cleaning device guide rail 254 and the movable members 282 and 286 are provided in a direction parallel to the holding screen 204, they interfere with each other when the movable member 250 moves. However, as schematically shown in FIG. 3, the imaging device retracting region 298 is partially guided by the cleaning device guide rail 254 of the movable member 250 in the cleaning device moving space in a direction parallel to the holding screen 204. The portion supported by is overlapped with the moving portion, and the width of the screen printer is reduced accordingly. The movable member 250 is supported by the cleaning device guide rail 254 at a position away from the holding screen 204 in a direction parallel to the substrate transport direction, and an imaging device retraction area is utilized using the space below the supported portion. It can also be considered that 298 is provided. The imaging device retraction area 298 is provided at a position away from the portion of the movable member 250 where the cleaning unit 202 is mounted, and the imaging device 22 is retreated to the imaging device retraction area 298, and the cleaning unit 202 and the movable member 250. Interference with the portion that supports the cleaning unit 202 and the substrate holding device 14 is avoided.

  As shown in FIG. 1, the movable member 286 is provided above the pair of imaging device guide rails 296 so as to extend in a direction parallel to the holding screen 204 and perpendicular to the substrate transport direction. The space above the imaging device guide rail 296 can be moved by the imaging device moving device 302 including the motor 300 and a feed screw mechanism 301 including a feed screw and a nut (see FIG. 7). In the present embodiment, the imaging apparatus moving motor 300 is configured by a servo motor that is an electric rotary motor capable of accurately controlling the rotation angle, and includes an encoder. Servo control is performed and the movable member 286 is moved forward. It can be moved to an arbitrary position in both reverse directions, and the moving speed can be controlled.

  At the time of imaging, the CCD camera 280 moves at an arbitrary position parallel to the holding circuit board 50 and the holding screen 204 in the space below the holding screen 204 and above the holding circuit board 50 by moving the movable members 282 and 286. Moved to. At this time, as shown in FIGS. 1 and 3, the imaging device moving space in which the imaging device 22 moves has a width equal to the length of the movable member 286 in the direction parallel to the holding screen 204, and the substrate holding device 14. In the direction perpendicular to the holding screen 204, the substrate includes a large part of the space between the substrate and the screen. The part corresponding to the holding screen 204 in the imaging apparatus moving space is the imaging apparatus work space. The two cleaning device retreat areas 256 are provided so as to be separated from the substrate holding device 14 in the front-rear direction of the screen printing machine and also from the imaging device moving space in the front-rear direction. Of the imaging device moving space and the cleaning device moving space, the portions corresponding to the holding screen 204 overlap 100% in the direction parallel to the holding screen 204 and in the direction perpendicular to the holding screen 204, In the space between the holding circuit board 50 and between the holding screen 204 and the circuit board 50 held by the board holding device 14 located at the lower end position, the holding screen 204 and the holding circuit board. Over 80% of the distance between 50 and 50. The overlapping of the cleaning device moving space and the imaging device moving space in the portion corresponding to the holding screen 204 is a portion of the cleaning device 20 and the imaging device 22 that passes through the space between the holding circuit board 50 and the holding screen 204. Discuss the occupied space. Therefore, in the direction perpendicular to the holding screen 204, the portion of the cleaning device moving space where the cleaning portion 202 and the cleaning portion 202 of the movable member 250 are mounted (references a and b are attached to FIG. 1). A portion between the two two-dot chain lines), the CCD camera 280 and the movable member 282, and the guide rail 284 and the movable member 286 between the holding screen 204 and the holding circuit board 50 in the imaging apparatus moving space. The overlapping part is discussed with respect to the moving part (the part between the two two-dot chain lines labeled c and d in FIG. 1).

Further, as will be described later, since the imaging device 22 captures images of both the circuit board 50 and the screen 204, the space between the CCD camera 280 and the holding circuit board 50, and between the CCD camera 280 and the holding screen 204 are also described. It is reasonable to think that the space in between is also the work space of the imaging device 22. Therefore, as shown in FIGS. 3 and 4, the main parts of the respective work spaces of the cleaning device 20 and the imaging device 22 almost overlap in both directions parallel to and perpendicular to the holding screen 204.
However, the space between the CCD camera 280 and the circuit board 50 and the space between the CCD camera 280 and the screen 204 are not working spaces of the imaging device 22, but are portions corresponding to the holding screen 204 in the imaging device moving space. Can be considered as a working space of the imaging apparatus.
The imaging device moving space is above the pair of imaging device guide rails 296, the guide rails 296 face upward, and the imaging device guide rail 296 and the cleaning device guide rail 254 face each other. Will be.

  The CCD camera 280 images the circuit board 50 and the screen 204, and has a configuration similar to, for example, a CCD camera described in Japanese Patent Laid-Open No. 2000-238233. However, the CCD camera 280 includes an illuminating device that illuminates the circuit board 50 and an illuminating device that illuminates the screen. However, the CCD camera 280 does not have a shutter. Illuminates, and the screen illumination device does not illuminate, whereby only an image of the imaging target portion of the circuit board 50 is obtained. Further, when imaging the screen 204, the screen illumination device illuminates the screen 40, and the circuit board imaging device does not illuminate, whereby only an image of the imaging target portion of the screen 204 is obtained.

  The movable member 282 also holds a stop position defining portion 330. In this embodiment, the stop position defining portion 330 includes a stop position defining member 332 and a lift drive device 334 as schematically shown in FIG. The stop position defining member 332 has a longitudinal shape, and is held by the movable member 282 so as to be movable up and down in a vertical direction perpendicular to the holding circuit board 50. The elevating drive device 334 is composed of, for example, an air cylinder, and the stop position defining member 332 is in contact with the downstream end of the circuit board 50 in the board conveyance direction, with its contact part or movement restriction part located in the board conveyance plane. Then, the circuit board 50 is moved up and down to a lowered position where the circuit board 50 is prevented from being transported and to a raised position where the circuit board 50 is retracted and allowed to transport the circuit board 50. The stop position defining member 332 is a position suitable for defining the stop position according to the dimension of the circuit board 50 in the direction parallel to the solder printing surface and perpendicular to the board conveying direction by the movement of the movable member 282, for example, the circuit board. It is located at a position in contact with the central portion in the direction (for example, the width direction) in which the above 50 dimensions are obtained.

  The stop position defining unit 330 constitutes a stop position defining device 336 in cooperation with the movable member 282, the guide rail 284, the movable member 286, and the moving device 290. The stop position defining device 336 is moved along the imaging device guide rail 296 by the imaging device moving device 302. In this embodiment, the stop position defining device 336, the stop position defining device moving device that moves the stop position defining device 336, and most of the guide rails that guide the movement, that is, the portions other than the stop position defining unit 330 are the imaging device 22, the imaging device. The moving device 302 and the imaging device guide rail 296 are also used, and the two imaging device retreat areas 298 are also stop position defining device retraction areas. The stop position defining device moving space, which is the moving space of the stop position defining device 336, is almost the same as the imaging device moving space in the direction parallel to the substrate transport direction and in the direction perpendicular to the circuit board 50. The parallel direction perpendicular to the substrate transport direction is included in the imaging device moving space. In addition, the portion corresponding to the circuit board 50 carried into the main conveyor 42 from the carry-in conveyor 40 in the stop position defining device moving space is the work space of the stop position defining device 336. The stop position defining device 336 can be considered to constitute a second working device different from the imaging device 22 and share a part other than the stop position defining unit 330 with the imaging device 22. As described above, the imaging device moving device 302 can move the movable member 286 in both the forward direction and the reverse direction. Therefore, the movable member 286 is moved to the stop position of the circuit board 50 conveyed in the forward direction. The stop position defining portion 330 is moved in the forward direction and the stop position in the reverse direction by moving the stop position defining part 330 to the reverse direction position that defines the stop position of the circuit board 50 conveyed in the reverse direction. It can be moved to the specified position.

  As shown in FIG. 7, the control device 24 includes a control unit including a computer 350 and an input / output unit 352, and a plurality of drive circuits 354. The computer 350 includes a CPU 356, a ROM 358, a RAM 360, and a bus for connecting them. The input / output unit 352 is connected to the image processing computer 362 on the input side, and the belt rotation motor 52 and the like are output on the input / output unit 352. Are connected to each other via a drive circuit 354. A motor that is a drive source of various devices constituting the screen printing machine is constituted by a servo motor having an encoder, similar to the imaging apparatus moving motor 300, and is servo-controlled. A step motor may be used instead of the servo motor. A linear motor may be used instead of the electric rotary motor. The ROM 358 stores various programs and data such as a main routine (not shown), a substrate holding routine, a substrate transport routine, a cream solder printing routine, and a screen cleaning routine.

Next, the operation will be described.
In this screen printing machine, it is assumed that cream solder is continuously printed on a large number of circuit boards 50, and the printed circuit board 50 is carried out and then the circuit board 50 to be printed with the cream solder is carried next. It explains from. The circuit board 50 is transported in the forward direction, and is transported from left to right in FIGS.

  At the time of board carry-out and carry-in, the main conveyor 42 is lowered to the board transfer position, and the circuit board 50 on which cream solder is to be printed next is carried into the carry-in conveyor 40. The image pickup device 22 is retracted to the image pickup device retreat area 298 on the carry-in conveyor 40 side, and at the same time, the stop position defining device 336 is positioned at the substrate carry-in position defining position. The board loading position defining position is a position on the main conveyor 42 side of the carry-in conveyor 40 and is a position located downstream from the circuit board 50 supplied to the carry-in conveyor 40 in the carry-in direction, and is lowered to the lowered position. The stop position defining member 332 thus defined defines the board carry-in position of the circuit board 50, and is placed on standby in preparation for carrying the circuit board 50 into the main conveyor 42. Further, the stop position defining member 332 is positioned at a position corresponding to the central portion of the circuit board 50 in the direction parallel to the holding screen 204 and perpendicular to the substrate transport direction. Then, the carry-in conveyor 40, the main conveyor 42, and the carry-out conveyor 44 are operated simultaneously in synchronism, and the circuit board 50 is transferred from the main conveyor 42 to the carry-out conveyor 44. The circuit board 50 is transferred to the main conveyor 42 and loaded. When the cream solder is printed on the circuit board 50, the cleaning device 20 is retreated to the cleaning device retreat area 256 on the rear side of the substrate holding device 14, and is connected to the stop position defining device 336, the imaging device 22, and the substrate holding device 14. Interference is avoided, and the stop position of the circuit board 50 is defined by the stop position defining device 336, the reference mark is imaged by the imaging device 22, the contact of the circuit board 50 held by the substrate holding device 14 with the screen 204, and the like are allowed. The

  Simultaneously with the conveyance of the circuit board 50, the stop position defining device 336 is moved in the positive direction, which is the same direction as the board conveyance direction. The stop position defining member 332 is located between the circuit board 50 carried in by the carry-in conveyor 40 and the circuit board 50 carried out by the main conveyor 42. In this embodiment, the moving speed of the movable member 286 is as follows. The circuit board 50 carried into the main conveyor 42 from the carry-in conveyor 40 is slower than the carry speed of 50, and the center of the downstream end in the carrying direction is parallel to the solder printing surface and perpendicular to the board carrying direction. It is avoided that the portion comes into contact with the stop position defining member 332, is transported in a state where the moving speed is regulated, and hits or rides on the circuit board 50 carried out from the main conveyor 42 to the carry-out conveyor 44. The movable member 286 is stopped at a preset forward direction position, the stop position defining portion 330 is stopped at the stop position defining position, and the circuit board 50 is positioned above the substrate support device 56 or printed. Stopped in position. The forward position of the movable member 286 and the board loading position regulation position of the stop position regulation device 336 are programmed in advance in the computer 350 by inputting coordinate values or the like in accordance with the board conveyance direction and the dimensions of the circuit board 50. The stop position defining member 332 is in contact with the central portion of the circuit board 50 in the direction parallel to the solder printing surface and perpendicular to the board conveyance direction, and regulates the moving speed, so there is one contact portion. The circuit board 50 does not rotate around an axis perpendicular to the solder printing surface with the contact portion with the stop position defining member 332 as a fulcrum, and is transported in a state where movement is stably regulated. The part that controls the moving speed of the movable member 286 and the conveying speed of the circuit board 50 of the control device 24 constitutes a speed control unit.

  The circuit board 50 is held by the board holding device 14 after being carried in. At the time of board loading, as shown in FIG. 8 (a), the board pressing member 94 is in a retracted position or retracted position located outside the clamp member 146, and after the circuit board 50 is stopped, as shown in FIG. 8 (b). Then, it is moved to the advance position or the pressing position so as to be positioned above the clamp member 146 and the circuit board 50. In FIG. 8, a portion of the pair of substrate pressing member 94 and clamp member 146 on the movable clamp member 146 side is illustrated, but the fixed clamp member 146 also conveys the fixed clamp member 146 side. It operates in the same manner as the movable clamp member 146 side except that it does not move in a direction parallel to the solder printing surface of the circuit board 50 and perpendicular to the board conveyance direction.

  Then, air having a predetermined pressure is supplied to the damper 164, and the clamp surface 148 of the movable clamp member 146 is pressed against the side surface of the circuit board 50 as shown in FIG. 8C, and the clamp surface 148 of the fixed clamp member 146. The circuit board 50 is interposed between and positioned. After positioning, air is extracted from the damper 164, and the circuit board 50 is released. In this state, the lifting platform 122 is raised by the lifting platform lifting / lowering drive device 124, and as shown in FIG. 8D, a pair of clamp members 146 are brought into contact with the pressing surface 108 of the substrate pressing member 94, and As shown in FIG. 8 (e), the lifting platform 182 is raised by the lifting platform lifting / lowering drive device 184, and the substrate support device 56 is raised. As shown in FIG. 8 (f), the support pins are connected to the circuit board 50. Is lifted from the conveyor belt 46 and pressed against the holding surface 108. At this time, the board support device 56 moves the circuit board 50 upward by a distance slightly larger than the gap with the pressing surface 108. This movement is allowed when the substrate pressing member 94 rises against the urging force of the spring 110, and the circuit board 50 is pressed against the pressing surface 108 to correct the warpage. In this state, air pressure is supplied to the damper 164, and the movable clamp member 146 clamps the circuit board 50 between the fixed clamp member 146 with a predetermined force and clamps it horizontally as shown in FIG. 8 (f). .

  In this state, the lifting platform 122 is lowered by the lifting platform lifting / lowering drive device 124, and as shown in FIG. 8G, after the clamp member 146 and the circuit board 50 are separated from the substrate pressing portion 106, FIG. As shown in h), the substrate pressing member 94 is retracted to the retracted position. Then, the lifting platform 122 is raised by the lifting platform lifting / lowering drive device 124, and the upper surface of the circuit board 50 clamped by the pair of clamp members 146 is the upper surface of the substrate pressing portion 106, as shown in FIG. It is located in the same plane. At this time, the upper surface of the clamp portion 147 is positioned slightly below the upper surface of the circuit board 50, but there is no problem. The pair of clamp parts 147 are fitted between the pair of substrate pressing parts 106, and the curved surfaces 114 and 170 are fitted. Each of the curved surfaces 114 and 170 is a fitting surface that is fitted to each other. The stop position defining unit 330 is positioned at the stop position defining position until the holding of the circuit board 50 by the substrate holding device 14 is completed, and the imaging device 22 is put on standby in preparation for imaging of the reference mark. The stop position defining member 332 is raised to the raised position at least before the holding of the circuit board 50 by the board holding device 14 is completed and the CCD camera 280 starts imaging the reference mark. For example, the stop position defining member 332 is moved to the ascending position immediately after the stop position defining unit 330 completes moving to the stop position defining position, or at the start of movement of the substrate pressing member 94 to the advance position. The imaging of the reference mark is not disturbed.

  After the circuit board 50 is held in this way, the CCD camera 280 is moved by the moving device 290 and the imaging device moving device 302, and the reference mark provided on the circuit board 50 and the reference mark provided on the screen 204 Respectively. Based on the imaging data, the X-axis and Y-axis position shifts between the holding circuit board 50 and the holding screen 204 and the rotation position shift around the vertical axis are calculated and corrected by the movement and rotation of the correction moving table 86. Then, the solder printing portion of the circuit board 50 and the position of the opening of the screen 204 are matched. After the imaging, the imaging device 22 is moved to the imaging device retraction area 298 on the carry-in conveyor 40 side, and the contact of the circuit board 50 held by the substrate holding device 14 with the screen 204 is allowed. In addition, the stop position defining device 336 is retracted to the retreat area together with the imaging device 22 to allow the circuit board 50 to contact the screen 204 and is positioned at the substrate carry-in position defining position. The member 332 is lowered to the lowered position and is put on standby in preparation for the supply of the circuit board 50 to the carry-in conveyor 40. In the present screen printing machine, the circuit board 50 is supplied to the carry-in conveyor 40 during the printing of the cream solder on the circuit board 50, and the supplied circuit board 50 is moved to the board carry-in position by the stop position defining member 332. Positioned and waited in preparation for loading into the main conveyor 42.

  After correcting the misalignment, the substrate holding device 14 is raised by the substrate holding device lifting device 60, and the circuit board 50, the substrate pressing member 94, and the clamp member 146 are raised to the printing position, as shown in FIG. 8 (j). Then, the substrate 204 is brought into contact with the substrate contact surface of the screen 204.

  After contact of the circuit board 50 with the screen 204, one of the pair of squeegee heads 210 is lowered, and the squeegee 216 is moved while being in contact with the screen 204 as shown in FIG. The cream solder placed on the screen 204 is moved into the opening of the screen 204 while being moved and applied to the circuit board 50. At this time, the squeegee 216 and the screen 204 are supported and received from below by the holding circuit substrate 50 and the substrate support device 56 and are also supported by the substrate pressing member 94 and the clamp member 146. The squeegee 216 has a longitudinal direction parallel to the substrate transport direction and is disposed in parallel to the longitudinal direction of the substrate pressing portion 106 and the clamp portion 147, moves in a direction perpendicular to the longitudinal direction, and the substrate pressing member 94. And the clamp member 146. The fitting surfaces of both the members 94 and 146 are curved surfaces 114 and 170 that are inclined with respect to the longitudinal direction over the entire longitudinal direction of the substrate pressing portion 106 and the clamp portion 147, so that their alignment is possible. The eyes do not have a portion parallel to the longitudinal direction of the squeegee 216, and any portion intersects the longitudinal direction of the squeegee 216, and the squeegee 216 is always in the fitting portion between the substrate pressing member 94 and the clamp member 146 In addition to being simultaneously received by them, it is possible to move without falling into the gap between the substrate pressing portion 106 and the clamp portion 147 without being parallel to the joint between the substrate pressing portion 106 and the clamp portion 147. Damage to the squeegee 216 is avoided. The substrate pressing portion 106 and the clamp portion 147 also function as a support member or a receiving member, and the surfaces on the side in contact with the screen 204 constitute a support surface or a receiving surface.

  After the application, as shown in FIG. 8 (l), the elevator 122 is lowered by a small distance by the elevator drive device 124, and the clamp member 146 and the circuit board 50 are separated from the screen 204. A so-called plate separation operation is performed. Next, as shown in FIG. 8 (m), the clamp member 146 is lowered by the side clamp device lifting device 120, the substrate holding device 14 is lowered by the substrate holding device lifting device 60, and the main conveyor 42 carries the substrate. Lowered to position. In parallel with the lowering of the side clamp device 62, the air is removed from the damper 164, the holding of the circuit board 50 by the movable clamp member 146 is released, and the substrate holding device 14 is lowered to the lowered end position. 8 is lowered, and the circuit board 50 is placed on the conveying surface 48 of the conveyor belt 46 of the main conveyor 42 as shown in FIG.

  When the circuit board 50 is conveyed in the reverse direction by the substrate conveying device 12, the carry-out conveyor 44 functions as a carry-in conveyor, the carry-in conveyor 40 functions as a carry-out conveyor, and the imaging device 22 and the stop position defining device 336 carry out the carry-out. The image is retracted to the image pickup device retreat area 298 on the conveyor 44 side. The substrate conveyance direction, the reverse stop position of the movable member 286, and the substrate loading position defining position of the stop position defining device 336 are programmed in advance, and the circuit board 50 is loaded into the main conveyor 42 from the unloading conveyor 44 and from the main conveyor 42. When being carried out to the carry-in conveyor 40, the stop position defining device 336 is moved from the carry-out conveyor 44 side to the main conveyor while regulating the movement of the circuit board 50 by the imaging device moving device 302 at a speed slower than the conveyance speed of the circuit board 50. It is moved to the 42 side, stopped at the reverse stop position set on the carry-in conveyor 40 side, and the stop position of the circuit board 50 is defined.

  For example, the screen 204 is cleaned by the cleaning device 20 when a preset condition is satisfied. The preset condition is, for example, that cream solder is printed on the set number of circuit boards 50. At the time of cleaning, the image pickup device 22 is retracted to the image pickup device retreat area 298 and does not hinder the cleaning of the screen 204 by the cleaning device 20. The same applies to the stop position defining device 336. The cleaning device 20 is moved by the cleaning device moving device 264 in a state where the wiping sheet is pressed against the substrate contact surface of the screen 204, and wipes off dirt adhering to the substrate contact surface and the like.

  When performing maintenance work on the screen printing machine, the operator enters the recess 32 provided in the main frame 28 and easily approaches various devices constituting the screen printing machine from the front side of the screen printing machine. Work can be done. In addition, the maintenance tool and the maintenance material can be taken out from the storage portion 36 and the work can be performed quickly. When performing maintenance on the cleaning device 20, the imaging device 22 is moved to the imaging device retreat area 298, and the cleaning device 20 is moved to the cleaning device retreat area 256 on the front side of the substrate holding device 14. In the case of performing maintenance on the cleaning unit 22, the cleaning device 20 is moved to the cleaning device retreat area 256 on the rear side of the substrate holding device 14, and the CCD camera 280 is screen-printed by moving the movable member 282 on the movable member 286. It is moved to the front side of the machine. The squeegee device 18 is also moved to the front of the screen printer during maintenance. Maintenance work of various devices is performed on the front side of the screen printing machine, and this screen printing machine has an electronic component mounting line as a work line together with other work machines such as an electronic component mounting machine and an adhesive application machine. When configured, the operator does not have to bypass other work machines and go around the screen printer in order to perform maintenance on the device on the rear side of the screen printer, and perform maintenance work efficiently. Production efficiency can be increased. In particular, since the cleaning device guide rail 254 extends to the two protrusions 34, the cleaning device 20 is partially moved to a position corresponding to the recess 32, and is easily accessible by the operator. Is easily done.

  In this screen printing machine, the cleaning device guide rail 254 and the imaging device guide rail 296 are provided at right angles to each other, and the cleaning device 20 and the imaging device 22 share a part of the moving space, and each work space. The cleaning device retreat area 256 is provided in front of and behind the screen printing machine, and the cleaning device retreat area 256 conveys the substrate to the substrate holding device 14 in the same manner as the imaging device retreat area 298. The width of the screen printer can be reduced as compared with the case where it is provided on one side of the direction. In order to support the conveyance of the circuit board 50 in both the forward and reverse directions, the image pickup device retreat area 298 is provided on both sides of the substrate holding device 14 in the substrate transfer direction, but both the image pickup device and the cleaning device are the width of the screen printing machine. In the case of moving in the direction, a cleaning device retreat area is further provided in the screen width direction, and the width of the screen printing machine can be made smaller than that. Even when the circuit board 50 is moved in both forward and reverse directions, only one imaging device retraction area may be provided.

  The movable members 250 and 286 on which the cleaning device 20 and the imaging device 22 are mounted are supported at both ends by a pair of guide rails 254 and 296, respectively, have high support rigidity, and move stably with little vibration. And cleaning and imaging are performed with high accuracy.

Further, each fitting surface between the substrate pressing member and the clamp member may be a surface in which at least a part of the longitudinal direction has a component inclined with respect to the longitudinal direction (except for a right angle). 9 may be an inclined surface extending linearly from one end to the other in the longitudinal direction, such as a fitting surface 384 provided on the substrate pressing portion 382 of the substrate pressing member 380 shown in FIG. The clamp part 388 of the clamp member 386 fitted to the board pressing part 382 has a fitting surface 390 corresponding to the fitting surface 384. Alternatively, one of the two fitting surfaces to be fitted to each other is a surface having at least one, for example, one V-shaped convex part and one vertex, and the other is a V-shaped corresponding to it. One of the fitting surfaces may be a surface having two or three V-shaped convex portions and two or three vertices, and the other is a surface having one concave portion. It may be a corresponding surface. FIG. 10 shows an example in which the fitting surface 404 of the substrate pressing portion 402 of the substrate pressing member 400 and the fitting surface 410 of the clamp portion 408 of the clamp member 406 each have three V-shaped convex portions 412. . The convex portion may be U-shaped.
The configurations of the mating surfaces of the substrate holding device, the substrate holding device lifting device, the side clamp device lifting device, the substrate supporting device lifting device, and the substrate pressing member and the clamp member of the above embodiment can be claimed in a screen printing machine. It can be adopted independently of the configuration. Further, the present invention is not limited to screen printing machines, and can also be used in work machines that hold circuit boards, such as high-viscosity fluid applicators such as adhesive applicators and electronic component mounting machines. You may abbreviate | omit the structure of a fitting with a board | substrate holding | suppressing part and a clamp part.

Further, the stop position defining member may have one contact portion or movement restricting portion, or a plurality of stop position defining members may be in contact with the circuit board at a plurality of locations. The plurality of movement restricting parts are provided at a distance in a direction parallel to the solder printing surface of the circuit board and perpendicular to the board conveying direction. For example, when the stop position defining member has two contact parts, It has a bifurcated shape such as a letter shape or a V shape. Even when the stop position defining member has a plurality of contact portions, the stop position of the circuit board may be defined at a position corresponding to the central portion in a direction parallel to the solder printing surface of the circuit board and perpendicular to the board transport direction. desirable. If the stop position defining member has a plurality of contact portions, for example, when the circuit board is carried into the board holding device, the movement of the circuit board can be regulated with a more stable posture.
The stop position defining member of the stop position defining device is positioned at a position corresponding to the center of the circuit board parallel to the solder printing surface and perpendicular to the board transport direction to define the stop position of the circuit board. It is not limited to.

  Further, the squeegee device is not limited to the open type, and for example, a cream solder may be accommodated in a sealed container, pushed out from the opening by the extrusion device, and a squeegee provided in the opening.

  Further, the squeegee device may be a device in which the moving direction of the squeegee head is parallel to the substrate transport direction.

  Alternatively, the screen support device may be moved up and down by a screen support device lifting / lowering device, which is a contact / separation device, so that the screen is brought into contact with or separated from the circuit board supported by the substrate support device.

  Furthermore, the first fixed guide and the second fixed guide may extend in a direction parallel to the screen and perpendicular to each other and are separated from each other in a direction perpendicular to the screen, but may be provided so as not to face each other. For example, a state in which one of the first fixed guide and the second fixed guide faces in the horizontal direction (for example, the front-rear direction, for example, the state from the rear side toward the front side or the left-right direction, for example, leftward The other side is provided at a position above the one, at a right angle with respect to the one and downward in a suspended state. The other may be provided at a position lower than one and at a right angle and upward with respect to the other. Alternatively, at least one of the first and second fixed guides may be provided in a pair so that the movable member is supported at both ends. When a pair of guides facing in the horizontal direction are provided, they may be provided side by side in the vertical direction within the same vertical plane.

  Furthermore, the movement space and the retreat area of the first work device and the second work device are such that at least a part of one movement space and the other retraction area is in a direction parallel to the screen held by the screen holding device. It is possible to overlap, and depending on the case, it is also possible to overlap a part of each retreat area.

  Further, the claimable invention is not limited to a cleaning device provided with only a substrate contact surface side cleaning unit that cleans the substrate contact surface of the screen and cleans the screen from the substrate contact surface side, as described in JP-A-9-39214. Like the cleaning unit of the cleaning device, the substrate contact surface cleaning unit and the solder mounting surface side cleaning unit that cleans the screen from the solder mounting surface side on which the cream solder of the screen is mounted and moved by the squeegee You may apply to the board | substrate contact surface side cleaning part of the provided cleaning apparatus.

14: Board holding device 16: Screen holding device 20: Cleaning device 22: Imaging device 50: Circuit board 204: Screen 254: Guide rail for cleaning device 296: Guide rail for imaging device 336: Stop position defining device

Claims (3)

A substrate holding device for holding a circuit board;
A screen holding device for holding the screen;
A squeegee device that moves along the screen and prints cream solder on the circuit board held by the substrate holding device through the screen;
A circuit board carrying device that carries the circuit board into the substrate holding device and unloads the circuit board; and
A screen printing machine including the substrate holding device, the screen holding device, the squeegee device, and a frame that supports the substrate transport device,
A cleaning guide fixed to the frame in a posture that is parallel to the screen and extends in the front-rear direction perpendicular to the left-right direction that is the substrate transport direction of the substrate transport device;
The substrate holding device and the screen holding device are movably provided in a space formed by being separated from each other, and (a) at least a wiping sheet supply shaft and a wiping sheet around which the wiping sheet is wound A screen that is held by the screen holding device by a wiping sheet that extends between the wiping sheet supply shaft and the wiping sheet winding shaft. A cleaning unit that wipes and cleans the surface of the sheet , and (b) holds the cleaning unit and is guided by the cleaning guide in a direction perpendicular to the wiping sheet supply shaft and the wiping sheet winding shaft. a move possible cleaning movable member, a cleaning device including a cleaning unit for a mobile device for moving the cleaning movable member (c),
The substrate holding device and the screen holding device are movably provided in a space formed by being separated from each other, and (d) an imaging unit that images the circuit board held by the substrate holding device, An imaging device that includes an imaging movable member that holds the imaging unit, and (f) an imaging unit moving device that moves the imaging movable member in a direction parallel to the screen, and
The planar shape of the frame, the center of the lateral direction of the front side, the depression toward the rear side and is shaped with a recess having a width obtained contains the worker together, before and SL cleaning device For each of the imaging devices, a retreat area is provided in which the cleaning device and the image capture device do not interfere with each other's movement and the approach between the substrate holding device and the screen holding device, and of the retreat areas, cleaning device for a save area is a save area of the cleaning device is provided on the front side position from the substrate holding device and the substrate transfer device Rutotomoni, the cleaning section and the cleaning movable to the cleaning device for save area A screen printing machine, wherein a member is guided by the cleaning guide and moved by the cleaning unit moving device . The imaging device is guided by the imaging fixed guide fixed to the frame in a posture extending in a direction parallel to the screen and perpendicular to the cleaning guide, and the imaging guide. A movable guide moving portion that includes a movable guide for imaging that extends in a parallel direction, and wherein the moving device for imaging section moves the movable guide for imaging along the fixed guide for imaging, and the movable member for imaging. The screen printing machine according to claim 1, further comprising: an imaging movable member moving unit that moves the imaging along the imaging movable guide . The imaging apparatus is guided by the imaging fixed guide fixed to the frame in a posture extending in a direction parallel to the screen and parallel to the cleaning guide, and the imaging guide. A movable guide moving section that moves the imaging movable guide along the imaging fixed guide, and the imaging movable member. The screen printing machine according to claim 1, further comprising: an imaging movable member moving unit that moves the imaging along the imaging movable guide .

Images