JP2006289815A - Printing device and method for positioning stencil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printing device capable of easily performing a stencil setting operation in compliance with the kind of the stencil 51. <P>SOLUTION: A stopper 57 for positioning the stencil 51 by coming into contact with the rear end of the latter, is installed at a squeegee unit 65 which enables a squeegee 61 to move in the depth direction of the printing device. The stopper 57 can be retreated from the setting height of the stencil 51 with the help of a stopper lifting means 58. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a printing apparatus or the like that prints paste such as cream solder on a substrate.

  Conventionally, a stencil (mask) for screen printing is placed on a substrate set on a printing stage, and paste (such as cream solder) supplied on the stencil is expanded with a squeegee to form openings (pattern holes) on the stencil. A screen printing apparatus that prints (applies) a paste to a predetermined position of a substrate via a) is well known.

  For example, in Patent Document 1, in order to position and attach a stencil accurately in a short time, joint members are attached to the left and right sides of the stencil, and the attachment members and the joint members provided on the left and right sides of the apparatus main body are positioned via guide pins. A printing apparatus configured to do so is disclosed.

Patent Document 2 discloses a printing apparatus in which two types of stoppers for positioning a stencil in the front-rear direction are provided on a clamp member that clamps the stencil so that a stencil of two sizes can be positioned.
Japanese Utility Model Publication No. 6-11172 Japanese Utility Model Publication No. 7-18838 (paragraphs 0014 and 0027)

  However, the positioning through the guide pin as in Patent Document 1 is intended for position reproducibility when attaching and detaching a specific stencil. When replacing with a stencil having a different size, it is necessary to visually check each time. There was a problem in workability because it had to be positioned.

  Moreover, when the stopper according to stencil size is provided like patent document 2, a structure will become complicated.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a printing apparatus and the like that can easily perform a stencil mounting operation while corresponding to the type of stencil.

  The present invention provides the following means.

[1] In a printing apparatus for applying a paste to a substrate via a stencil,
A printing apparatus comprising a movable unit that is movable in the depth direction of the printing apparatus.

  [2] The printing apparatus according to [1], wherein the contact member is provided in the movable unit so as to be retractable from a mounting height of the stencil.

  [3] The printing apparatus according to item 1 or 2, further comprising contact member position control means for controlling the position of the contact member by moving the movable unit according to the type of stencil.

  [4] The printing apparatus according to any one of items 1 to 3, wherein the movable unit is a squeegee unit to which a squeegee is attached and moves the squeegee.

[5] A method for positioning a stencil in a printing apparatus for applying a paste to a substrate,
A stencil positioning method comprising: positioning a stencil by contacting a stencil with a contact member provided on a movable unit movable in a depth direction of the printing apparatus.

  According to the above invention [1], since the position of the contact member can be set by the moving operation of the movable unit, the stencil can be easily attached while appropriately positioning the stencil according to the type of the stencil.

  According to the above invention [2], when the positioning of the stencil is completed, the contact member can be retracted to prevent interference between the stopper and the stencil, and various operations by the movable unit can be performed.

  According to the invention [3], since the contact member position is controlled by the contact member position control means, the stencil can be attached more efficiently.

  According to the invention [4], the contact member can be positioned using the mechanism for moving the squeegee, and the apparatus can be simplified.

  According to the above invention [5], since the position of the contact member can be set by the moving operation of the movable unit, the stencil can be easily attached while appropriately positioning the stencil according to the type of the stencil.

  1 is a side view of a screen printing apparatus according to an embodiment of the present invention, FIG. 2 is a front view of the apparatus, FIG. 3 is a plan view of the apparatus, and FIG. 4 is a perspective view of the periphery of a printing stage 10 of the apparatus. is there. As shown in these drawings, a printing stage 10 is provided on the base 2 of the screen printing apparatus, and a printed circuit board W is carried into and out of the printing stage 10 on both sides of the printing stage 10. Upstream conveyor 11 and downstream conveyor 12 are arranged along the X-axis direction (conveyance line).

  Further, the printing apparatus is provided above the printing stage 10, a clamping unit 3 for clamping the printed circuit board W, a positioning unit 4 for engaging and positioning on the upper surface of the substrate when clamping the substrate W, and the printing stage 10. A substrate that includes a stencil holding unit 5 and a squeegee unit 6, a camera unit 7 for photographing the substrate W and the stencil 51, and a cleaner 8 for cleaning the stencil 51, and is a substrate clamped by the clamp unit 3 as described later. W is superposed on the stencil 51 of the stencil holding unit 5, and in this state, screen printing is performed by the squeegee 61 of the squeegee unit 6.

  As shown in FIGS. 1 and 2, a rail 211 is disposed on the base 2 along the Y-axis direction orthogonal to the X-axis direction in the horizontal plane, and the Y-axis table 21 is mounted on the rail 211. It is slidably attached in the Y-axis direction. Further, a ball screw mechanism (not shown) is provided between the Y-axis table 21 and the base 2, and the Y-axis table 21 moves in the Y-axis direction with respect to the base 2 by driving the ball screw mechanism. It is configured as follows.

  A rail 221 is disposed on the Y-axis table 21 along the X-axis direction, and the X-axis table 22 is slidably attached to the rail 221 in the X-axis direction. Further, a ball screw mechanism (not shown) is provided between the X-axis table 22 and the Y-axis table 21, and the X-axis table 22 moves in the X-axis direction with respect to the Y-axis table 21 by driving the ball screw mechanism. It is configured to move.

  The X-axis table 22 is provided with an R-axis table 23 via a rotation unit 231 so as to be rotatable around an axis line in the vertical line (Z-axis direction). The R-axis table 23 is configured to be rotationally driven around the Z axis by a rotational driving means (not shown).

  Slide struts 241 are attached to the four corners of the R-axis table 23 so as to be slidable in the vertical direction (Z-axis direction), and an elevating table 24 is attached to the upper part of the slide strut 241. A lifting table 24 is attached to the R-axis table 23 so as to be movable up and down in the Z-axis direction. Further, a ball screw mechanism 243 is provided between the lift table 24 and the R-axis table 23, and the lift table 24 is driven in the Z-axis direction (vertical direction) with respect to the R-axis table 23 by driving the ball screw mechanism 243. It is configured to move. In this embodiment, the lifting table 24 and the clamp unit 3 provided on the lifting table 24 constitute the printing stage 10.

  A pair of main conveyors 20 is provided on the lifting table 24 along the X-axis direction. The main conveyor 20 is arranged with the upstream end and the downstream end facing the end of the upstream conveyor 11 and the end of the downstream conveyor 12 in a state where the lifting table 24 is lowered. . In this opposed state, the gap between the main conveyor 20 and the two-side conveyors 11 and 12 is set to an interval at which the substrate W can be connected between the conveyors, and specifically, set to a small value of about 5 mm. Therefore, in this embodiment, the main conveyor 20 moves in the X-axis and R-axis directions by the movement of the X-axis and R-axis tables 22 and 23 in the lowered state in order to avoid interference with the both-side conveyors 11 and 12. In addition, the movement in the Y-axis and R-axis directions due to the movement of the Y-axis and R-axis tables 21 and 23 is restricted in order to prevent positional deviation with respect to the both-side conveyors 11 and 12. That is, in the lowered state, the main conveyor 20 is restricted from moving in the horizontal direction (X-axis, Y-axis, and R-axis directions) due to the movement of the X-axis, Y-axis, and R-axis tables 21 to 23.

As shown in FIGS. 1 to 4, the clamp unit 3 provided on the lifting table 24 includes a pair of strip-shaped clamp pieces 31 a and 31 b disposed along the X-axis direction above the pair of main conveyors 20. is doing. The one side clamp piece 31a is fixed to the elevating table 24, and the other side clamp piece 31b is slidably attached in the Y-axis direction, and is configured to be able to contact and separate from the one side clamp piece 31a.
A pair of clamp pieces 31a and 31b are opened and closed by holding and releasing the substrate W when the other side clamp piece 31b is brought into contact with and separated from the one side clamp piece 31a by a clamp driving means (not shown). Yes.

  As shown in FIGS. 3 and 4, a plurality of suction holes 35 are provided on the upper surfaces of the clamp pieces 31a and 31b. Each suction hole 35 is configured to be set to a negative pressure by suction means (not shown). In a state where the stencil 51 is overlaid on the clamp pieces 31a and 31b, each suction hole 35 is set to a negative pressure so that the stencil 51 is sucked and held on the upper surfaces of the clamp pieces 31a and 31b. Yes.

  As shown in FIGS. 1 to 4, the elevating table 24 is provided with a mounting table 29 corresponding to the pair of main conveyors 20 and capable of moving up and down in the vertical direction via slide columns 291. Further, the mounting table 29 is configured to move up and down with respect to the lifting table 24 by driving means (not shown) such as a ball screw mechanism. When the placement table 29 is raised, the substrate W on the main conveyor 20 is transferred onto the placement table 29 and moved upward, and when lowered, the substrate W on the placement table 29 is moved to the main. It is configured to be transferred to the conveyor 20 side.

  As shown in FIGS. 1 to 4, a positioning unit 4 including a pair of strip-shaped positioning plates 41 a and 41 b is provided outside the clamp pieces 31 a and 31 b. The positioning plates 41a and 41b are provided between a retracted position disposed on both sides of the clamp pieces 31a and 31b and a positioning position pressed and abutted on the upper side of the clamp pieces 31a and 31b via a support mechanism (not shown). It is configured to be freely displaceable between them. When the substrate W is held by the clamp pieces 31a and 31b, the positioning plates 41a and 41b are arranged at the positioning positions, and the substrate W is restrained from above so that the substrate W is positioned in the vertical direction. .

  In addition, at four corners of the elevating table 24, support columns 44 are erected as support members for supporting the positioning plate. In the state where the positioning plate 41a is disposed at the retracted position (retracted state), the positioning plates 41a and 41b are supported by the support column 44, thereby supporting the printing pressure (load) when the paste is expanded by the squeegee 61 described later. It is configured as follows.

  The positioning plates 41a and 41b are provided with a plurality of suction holes 45. Each suction hole 45 is configured to be set to a negative pressure by suction means (not shown) via a suction pipe 46. As will be described later, when the stencil 51 is overlaid on the positioning plates 41a and 41b, the suction hole 45 is set to a negative pressure, whereby the stencil 51 is attracted and held on the upper surfaces of the positioning plates 41a and 41b. It is configured as follows.

  FIG. 5 is a schematic perspective view showing the positional relationship of each part of the printing apparatus according to this embodiment.

  As shown in FIG. 5, the stencil holding unit 5 has stencil support bases 52 that are fixedly provided on both the left and right sides of the printing stage 10. On the stencil support base 52, an opening (pattern) is formed in a solder application portion. The stencil 51 having a hole) is placed in a state of being stretched horizontally. Two stencil clamps 53 are provided on the left and right stencil support bases 52 respectively on the front and rear sides. The stencil clamps 53 are driven by a driving means (not shown) such as an air cylinder, and the frame portion 54 of the stencil 52 is provided. Is pressed onto the stencil support base 52 so that the stencil 51 is fixed on the stencil support base 52.

  The left and right stencil support bases 52 are formed with a large number of pin holes 56. The positioning pins 55 are inserted into the pin holes 56 according to the left and right width (size in the X-axis direction) of the stencil 51 to be used. Thus, the stencil 51 can be positioned in the left-right direction (X-axis direction) when the stencil 51 is placed. The positioning of the stencil 51 in the depth direction will be described later.

  The squeegee unit 6 provided on the upper side of the stencil holding unit 5 is supported by squeegee support frames 63 and 63 erected on the left and right sides of the printing stage 10 as shown in FIG. Squeegee guide rails 64, 64 extending in the Y-axis direction are provided on the upper surfaces of the left and right squeegee support frames 63, 63, respectively, and a movable beam that can move along the Y-axis direction on the squeegee guide rails 64, 64. 65 is provided so as to straddle the upper side of the printing stage 10. One squeegee support frame 63 is provided with driving means 66 composed of a ball screw mechanism for moving and driving the movable beam 65 along the Y-axis direction. In this embodiment, the movable beam 65 is a movable unit that is movable in the depth direction of the printing apparatus, and functions as a squeegee unit that moves the squeegee.

  FIG. 6 is a perspective view of the squeegee unit as viewed obliquely from the front, FIG. 7 is a perspective view of the squeegee unit as viewed from obliquely rear, and FIG. 8 is a side view of the squeegee unit.

  On the front side of the movable beam 65 of the squeegee unit 6, a squeegee holder 62 in which a pair of squeegees 61, 61 are provided so as to be movable up and down is attached. The squeegees 61 and 61 are guided in the ascending / descending direction by a bearing 614 of the squeegee holder 62 and a slide shaft 612 passing through the squeegee holder 62 so that the squeegees 61 and 61 can be driven up and down independently by a squeegee lifting cylinder 611 provided in the squeegee holder 62. It has become.

  The weight of the squeegees 61 and 61 is supported by a weight cancellation mechanism 621 provided in the squeegee holder 62, and a pressure sensor 613 such as a load cell is interposed between the squeegee lifting cylinder 611 and the squeegees 61 and 61. . As a result, the squeegees 61 and 61 can be brought into pressure contact with the stencil 51 at a preset pressure by drivingly controlling the squeegee lifting cylinder 611 based on the detection value of the pressure sensor 613.

  Then, by moving one squeegee 61 to one side in the Y-axis direction while being lowered, the cream solder S can be expanded on the stencil 51 while rolling (kneading) toward one side in the Y-axis direction, while the other By moving the squeegee 61 to the other side in the Y-axis direction while being lowered, the cream solder S can be expanded on the stencil 51 while rolling toward the other side in the Y-axis direction.

  Further, a stopper 57 made of an L-shaped material for positioning the stencil 51 in the depth direction (Y-axis direction) when the stencil 51 is mounted is provided on the rear surface side of the movable beam 65. This stopper 57 is guided in the ascending / descending direction by bearings 591 and 591 provided on a stopper attaching member 571 on the rear surface of the movable beam 65 and slide shafts 59 and 59 penetrating therethrough, and an air cylinder provided on the attaching member 571. It is driven up and down by a stopper raising and lowering means 58 made up of and the like.

  When the stopper 57 is lowered as shown by the solid line in FIG. 8 by this lifting operation, the stopper 57 reaches the stencil mounting height on the stencil base 52 and contacts the rear end surface of the stencil frame 54 of the stencil 51 on the stencil base 52. It becomes possible. By providing such a stopper 57 on the movable beam 65, the movable beam 65 can be moved in accordance with the type of the stencil 51 so that the stencil 51 can be positioned in the depth direction (Y-axis direction) of the printing apparatus. It has become. The stopper 57 in this embodiment functions as an abutting member that abuts on the stencil 51 for positioning.

  Further, as indicated by an imaginary line in FIG. 8, the stopper 57 moves upward to retract above the stencil mounting height. Accordingly, the movable beam 65 can move in the front-rear direction (Y-axis direction) without the stopper 57 interfering with the stencil frame 54.

  Further, as shown in FIG. 5, lower guide rails 74, 74 extending in the Y-axis direction are provided on the lower surface side of the squeegee support frames 63, 63, and a moving beam (moving unit) is provided on the lower guide rails 74, 74. ) 75 is supported so that it can run. A camera guide rail 771 extending in the X-axis direction is provided on the front side of the moving beam 75, and a camera head 71 is provided on a slider 772 that can move on the rail 771. The camera head 71 is equipped with an upward stencil photographing camera 711 for photographing the stencil 51 and a downward substrate photographing camera 712 for photographing the substrate W.

  Further, a cleaner 8 is attached to the rear surface side of the moving beam 75 for cleaning in sliding contact with the lower surface (printing surface) of the stencil 51.

  FIG. 9 is a block diagram showing a control system of this printing apparatus. As shown in the figure, in this apparatus, in addition to the CPU 91 as a control means for controlling the drive of each drive unit, a keyboard 92 as an input means, a CRT display 93 as a display means, a storage device 94, etc. Is provided. The keyboard 92 is for inputting various data related to the printing process to the printing apparatus, and the CRT display 93 is for displaying various information (data). Further, the storage device 94 stores various data necessary for printing.

  Moreover, in this embodiment, as a drive part (device to be controlled) controlled by the CPU 91, for example, a drive part of each conveyor 11, 12, 20; a drive part of each table 21, 22, 23, 24, 29; The drive parts (air supply means) of the pieces 31a and 31b and the positioning plates 41a and 41b, the stencil clamp 53, the stopper elevating means 58, the squeegee elevating cylinder 611, the drive means 66 of the movable beam 65, the drive part of the camera unit 7 and the cleaner 8 There is a drive part.

  In this embodiment, predetermined data is input from the keyboard 92 in advance before starting the printing operation. The predetermined data includes data related to the substrate W (substrate data). As the substrate data, for example, as shown in FIG. 10, the size of the substrate, the position, shape and size of the fiducial mark, the size of the stencil to be used, the opening position, the position, shape and size of the fiducial mark, In addition, squeegee speed, printing pressure, clamp air pressure, etc. are included.

  Here, the opening position of the stencil is information indicating where the area of the opening formed in the stencil 51 exists in the depth direction of the stencil 51. For example, there are several standards for the opening position such as the back side, the center, and the near side, and it can be expressed as a stencil 51 according to any standard. In the left-right direction, the existing standard forms an opening at the center.

  In the printing apparatus according to the present embodiment, when the substrate to be produced is switched, the corresponding stencil 51 is attached. At this time, the stencil 51 is positioned in the printing apparatus. It comes to support.

  Specifically, for example, when switching of the board to be produced is input to the keyboard (input means) 92, the CPU 91 reads the size information and the opening position information of the stencil 51 to be used from the board data of the board W to be newly produced. . Then, the CPU 91 determines that the center of the opening of the stencil 51 corresponds to the center of the substrate W held on the printing stage 10 when the stencil 51 is positioned by the stopper (contact member) 57 according to this information. The movable beam 65 that supports the stopper 57 is moved in the Y-axis direction by the driving means 66 so that Then, the stopper lifting means 58 lowers the stopper 57 to the stencil height.

  In this embodiment, the related components are set so that the position of the stopper 57 in the Y-axis direction can be calculated mainly from the substrate size, stencil size, and opening position data.

  In this embodiment, positioning of the stencil in the left-right direction (X-axis direction) is performed by the positioning pin 55 inserted into the pin hole 56 of the stencil base 52 as described above. It is easy to approach and it is possible to perform change adjustment work easily.

  If the stopper 57 is lowered to the stencil height in this way, the stencil 51 is fed to the back side of the apparatus while the left and right sides of the stencil 51 are guided by the positioning pins 55 on the stencil base 52, and the rear end of the stencil 51 is the stopper 57 When placed on the stencil base 52, the stencil 51 can be easily positioned at an appropriate position.

  As described above, the CPU 91 functions as stopper position control means (contact member position control means) for controlling the position of the stopper 57 by moving the movable beam in accordance with the size of the stencil 51 and the type of the stencil 51 such as the opening position. Is.

  When the fact that the stencil 51 is positioned at an appropriate position is transmitted to the CPU 91 by the keyboard 92 or the like, the CPU 91 fixes the stencil 51 on the stencil base 52 by the stencil clamp 53 and the stopper 57 is moved by the stopper lifting / lowering means 58. Retract to a height that does not interfere with 51. Accordingly, the movable beam 65 can be moved while preventing the interference between the stopper 57 and the stencil 51, and the printing operation by the squeegee 61 can be executed without any trouble.

  Further, since the stencil 51 is positioned so that the center of the opening of the stencil 51 and the center of the substrate W held on the printing stage 10 correspond to each other, printing is performed for alignment between the substrate W and the stencil 51. The amount of movement for moving the stage 10 in the horizontal direction can be small. For this reason, it is possible to shorten the time required for the printing operation for each substrate W. Further, since the stroke of the moving mechanism in the horizontal direction of the printing stage 10 can be set small, it is possible to contribute to reducing the size and weight of the apparatus.

  Next, a printing operation in this screen printing apparatus will be described. In the initial state, the elevating table 24 and the placing table 29 are in a lowered state, and the main conveyor 20 is disposed at a position corresponding to the upstream conveyor 11 and the downstream conveyor 12. Further, the clamp piece (fixed piece) 31a and the clamp piece (movable piece) 31b of the clamp unit 3 are opened by the clamp piece 31b, and the positioning plates 41a and 41b of the positioning unit 4 are respectively the clamp piece 31a and the clamp piece 31b. And in a positioning state in which the clamp piece 31a and the clamp piece 31b come into contact with each other with a predetermined pressing force from above.

  From this state, the printed circuit board W is carried into the main conveyor 20 from the upstream conveyor 11 and is conveyed to a predetermined position by the main conveyor 20.

  Subsequently, the substrate W is raised by the ascent of the mounting table 29 and positioned by contacting the positioning plates 41a and 41b. In this state, the substrate W is sandwiched and held by the clamp pieces 31a and 31b. Thereafter, the positioning plates 41a and 41b move away from the clamp pieces 31a and 31b to the retracted positions, respectively.

  Next, the elevating table 24 is raised, and the positioning plates 41 a and 41 b, the clamp pieces 31 a and 31 b and the upper surface of the substrate W are overlaid on the lower surface of the stencil 51 of the stencil holding unit 5.

  Thereafter, the one-side squeegee 61 of the squeegee unit 6 descends and moves in the Y-axis direction along the stencil 51, whereby the cream solder S as the paste supplied on the stencil 51 is expanded, and the cream solder S is printed (applied) on a predetermined position of the substrate W through the pattern hole of the stencil 51.

  Here, when performing solder application in the present embodiment, after the area of the squeegee 61 on the stencil 51 corresponding to, for example, the one-side positioning plate 41a and the one-side clamp piece 31a (one-side running area) is run, A region (printing area) on the stencil 51 corresponding to the upper side of W is slid. For this reason, before the cream solder S is applied to the substrate W, the cream solder S is rolled (kneaded) in the run-up area and the viscosity decreases. As a result, the cream solder S is reliably filled in the pattern holes of the stencil 51 and applied to the substrate W with high accuracy.

  Subsequently, at the same time when the elevating table 24 is lowered, the clamp pieces 31a and 31b are released and the holding on the substrate W is released. Further, the placement table 29 is lowered, and the substrate W is transferred from the placement table 29 to the main conveyor 20.

  Next, the substrate W is transported to the downstream conveyor 12 by the main conveyor 20 and sent to the next process via the downstream conveyor 12.

  In this way, the substrate W is carried out to the downstream conveyor 12, while the next substrate W is transferred to the main conveyor 20 by the upstream conveyor 11, and the same printing process as described above is performed. Thus, the substrates W are sequentially fed and sequentially printed.

  As described above, according to the printing apparatus of the present embodiment, the movable beam (movable unit) 65 movable in the depth direction of the printing apparatus is provided with the stopper (contact member) 57 that contacts the stencil 51 for positioning. The stopper position can be set by moving the movable beam 65. Accordingly, the stencil 51 can be easily attached while properly positioning the stencil 51 according to the type of the stencil 51.

  Further, according to the present embodiment, since the stopper (contact member) 57 can be retracted from the mounting height of the stencil 51, when the positioning of the stencil 51 is completed, the stopper 57 is retracted, and the stopper 57 and the stencil 51 Various operations such as a printing operation by the squeegee 61 by moving the movable beam (movable unit) 65 can be performed while preventing the interference.

  In the present embodiment, when the stencil 51 is attached, the position of the stopper 57 is controlled according to the type of the stencil 51 by a CPU (control means) 91 provided in the printing apparatus, so that the stencil 51 can be positioned more efficiently. Including installation work can be performed.

  In this embodiment, since the stopper (contact member) 57 is attached to the movable beam (squeegee unit) 65 that moves the squeegee, the stopper 57 can be positioned using a mechanism that moves the squeegee 61. Can be simplified.

  In the above embodiment, the contact member (stopper) for positioning the stencil in the depth direction is provided in the squeegee unit. However, a cleaner unit for moving the cleaner for cleaning the stencil and a camera for photographing the stencil or the substrate are attached. It may be provided in the camera unit.

  Moreover, in the said embodiment, although the contact member was supported from the upper side, when attaching a contact member to the movable unit arrange | positioned under the stencil, you may make it support a contact member from lower side. .

  In the above embodiment, the contact member (stopper) is retracted from the mounting height of the stencil by moving it up and down, but may be retracted by rotating operation.

  Further, in the above embodiment, the printing stage that supports the substrate is raised and lowered so as to be superimposed on the stencil, but the present invention is a stencil raising and lowering type in which the stencil is raised and lowered to be superimposed on the substrate on the printing stage. The present invention can also be applied to other printing apparatuses.

  In the above embodiment, the substrate is placed on the placement table. However, the present invention may employ other placement means such as a pin-type placement means composed of a plurality of pins. .

It is a side view of the printing apparatus concerning one Embodiment of this invention. It is a front view which shows the said printing apparatus. It is a perspective view which shows the said printing apparatus roughly. It is a perspective view which shows the principal part of the said printing apparatus. It is a perspective schematic diagram showing the positional relationship of each part of the printing apparatus concerning this embodiment. It is the perspective view which looked at the squeegee unit of the said printing apparatus from diagonally forward. It is the perspective view which looked at the squeegee unit from diagonally backward. It is a side view of the squeegee unit. It is a block diagram which shows the control system of the said printing apparatus. It is a figure which shows the content of the board | substrate data employ | adopted as the said printing apparatus.

Explanation of symbols

10 Printing stage 51 Stencil 52 Stencil base 57 Stopper (contact member)
58 Stopper lifting means 61 Squeegee 65 Movable beam (movable unit, squeegee unit)
66 Drive means 91 CPU (contact member position control means)
S Cream solder (paste)
W substrate

Claims (5)

A printing apparatus for applying a paste to a substrate via a stencil,
A printing apparatus comprising a movable unit that is movable in the depth direction of the printing apparatus.   The printing apparatus according to claim 1, wherein the contact member is provided in the movable unit so as to be retractable from a mounting height of the stencil.   The printing apparatus according to claim 1, further comprising a contact member position control unit configured to control the position of the contact member by moving the movable unit according to a type of stencil.   The printing apparatus according to claim 1, wherein the movable unit is a squeegee unit to which a squeegee is attached and moves the squeegee. A method for positioning a stencil in a printing apparatus for applying a paste to a substrate,
A stencil positioning method comprising: positioning a stencil by contacting a stencil with a contact member provided on a movable unit movable in a depth direction of the printing apparatus.

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