JP5051016B2 - Screen printing apparatus and squeegee holder for screen printing - Google Patents

Description

  The present invention relates to a screen printing apparatus that prints paste such as cream solder or conductive paste on a substrate with a squeegee, and a squeegee holder for screen printing.

  In an electronic component mounting process, screen printing is used as a method for printing paste such as cream solder or conductive paste on a substrate. In this method, paste is printed on a substrate through a pattern hole provided in accordance with a printing target portion, and the lower end portion of a plate-like squeegee member held by a squeegee holder is pressed against a mask plate. In this state, the pattern hole is filled with paste by a squeezing operation that moves the squeegee member in the horizontal direction, and the paste is printed on the substrate set on the lower surface of the mask plate.

  In this squeezing operation, the flexibility of the squeegee member in a state where the lower end portion of the squeegee member is pressed against the mask plate and brought into sliding contact is one parameter that defines printing characteristics. That is, the filling property of the paste into the pattern hole can be improved by making the squeegee member slide in contact with the mask plate in a state in which the squeegee member is easily bent. On the other hand, since the printing pressure for pressing the squeegee member against the mask plate is reduced and the scraping property of the paste is lowered, it is difficult to increase the squeezing speed. On the other hand, if the squeegee member is slidably contacted with the mask plate in a state where the squeegee member is not easily bent, the filling ability of the paste into the pattern hole is reduced, but the printing pressure can be set large and the scraping performance of the paste is improved. Thus, the squeezing speed can be increased.

Such flexibility adjustment of the squeegee member is often performed by changing a so-called “protrusion” of the squeegee that extends downward in a cantilevered state from the squeegee holder. As a method of changing the “progress”, a method of replacing the backup member itself used in the squeegee holder conventionally (Patent Document 1), or a method of adjusting the mounting position of the backup member in the squeegee holder (Patent Document 2). Etc. are known.
JP 2007-168283 A JP-A-10-95100

  However, the methods shown in the above prior art examples have the following difficulties. That is, in the example shown in Patent Document 1, since the backup member itself is exchanged, it is necessary to prepare a plurality of types of backup members according to the type of substrate to be printed. An increase in the management load for storing the backup member and selecting it correctly according to the substrate type is inevitable. Further, in the example shown in Patent Document 2, it is necessary to perform a complicated operation of adjusting the position of the backup member while confirming the “departure” according to the type every time the type is switched. As described above, in the prior art, when changing the “progress” of the squeegee member to cope with a plurality of types of printing conditions, the labor cost and the management load increase, and the adjustment work requires a great deal of labor and labor. was there.

  Therefore, an object of the present invention is to provide a screen printing apparatus and a squeegee holder for screen printing that can cope with a plurality of types of printing conditions with a simple operation without increasing the equipment cost and management load.

In the screen printing apparatus of the present invention, a substrate is brought into contact with a mask plate provided with a pattern hole, and a plate-like squeegee member is lifted and lowered by a lifting means with respect to the mask plate supplied with the paste. A screen printing apparatus that prints a paste on a substrate through the pattern hole by a squeegee movement that is squeezed on the mask plate by a squeegee moving means, and that holds the squeegee member and is coupled to the lifting means. The holder is coupled to the elevating means, and is detachably attached to the first member provided with a first holding surface inclined in an overhanging state in the advancing direction of the squeegee member in the squeezing operation. The ski is opposed to the first holding surface in a state where the ski is coupled to the first member. A second member provided with a second holding surface that forms a mounting gap larger than the thickness of the member, and interposed between the back side of the squeegee member in the traveling direction and the first holding surface. The rectangular plate-shaped backup member, the backup member, and the front surface side of the squeegee member in the advancing direction are held by the first holding surface and the second holding surface, respectively, Fastening means for fixing the squeegee member to the first member via the backup member by fastening two members, and a shape of a vertical cross section of the backup member in a state of being interposed in the mounting gap has a rectangular shape having four corners, at least two of the corner portion, in contact with the rear surface of the squeegee member in a state in which the interposed mounting gap Non-contact portions are provided with different non-contact dimensions for each corner portion, and the squeegee member is separated from the backup member by changing the mounting direction when the backup member is interposed in the mounting gap. The extension allowance that extends downward in the holding state is changed.

The squeegee holder for screen printing according to the present invention is a squeegee in which a plate-like squeegee member is raised and lowered by an elevating means with respect to a mask plate supplied with paste, and the squeegee member is slid on the mask plate by a moving means. In a screen printing apparatus for printing a paste on a substrate through a pattern hole provided in the mask plate by operation, a squeegee holder for screen printing that holds the squeegee member and is coupled to the lifting means, A first member that is coupled to an elevating means and is provided with a first holding surface that is inclined in an overhanging state in the advancing direction of the squeegee member in the squeezing operation, and is configured to be detachable from the first member. The squeegee facing the first holding surface in a state of being coupled to the first member A second member provided with a second holding surface that forms a mounting gap larger than the thickness of the material, and interposed between the back side of the traveling direction of the squeegee member and the first holding surface. The rectangular plate-shaped backup member, the backup member, and the front surface side of the squeegee member in the advancing direction are held by the first holding surface and the second holding surface, respectively, Fastening means for fixing the squeegee member to the first member via the backup member by fastening two members, and a shape of a vertical cross section of the backup member in a state of being interposed in the mounting gap has a rectangular shape having four corners, at least two of the corner portion, in contact with the rear surface of the squeegee member in a state in which the interposed mounting gap Non-contact portions are provided with different non-contact dimensions for each corner portion, and the squeegee member is separated from the backup member by changing the mounting direction when the backup member is interposed in the mounting gap. The extension allowance that extends downward in the holding state is changed.

  According to the present invention, the shape of the vertical cross section of the backup member that is interposed in the mounting gap of the squeegee holder together with the squeegee member, The non-contact part that does not come in contact has a shape with different non-contact dimensions for each corner part, and the squeegee member extends from the backup member in a cantilevered state by changing the mounting direction when the backup member is interposed in the mounting gap. By adopting a configuration in which the extension allowance is changed, it is possible to cope with a plurality of types of printing conditions with a simple operation without increasing the equipment cost and the management load.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 is a front view of a screen printing apparatus according to an embodiment of the present invention, FIG. 2 is a side view of the screen printing apparatus according to an embodiment of the present invention, and FIG. 3 is a screen printing apparatus according to an embodiment of the present invention. FIG. 4 is a diagram illustrating the operation of the screen printing apparatus according to the embodiment of the present invention. FIG. 5 is a diagram illustrating the configuration of the squeegee unit in the screen printing apparatus according to the embodiment of the present invention. FIG. 7 is a diagram illustrating the configuration of a squeegee holder in the screen printing apparatus according to one embodiment, FIG. 7 is a diagram illustrating the shape of a backup member used in the squeegee holder of the screen printing apparatus according to one embodiment of the present invention, and FIG. Explanatory drawing of the extension allowance change method of the squeegee member in the screen printing apparatus of one Embodiment, FIG. 9, FIG. 10 is a squeegee holder in the screen printing apparatus of one Embodiment of this invention. It is an explanatory view of a method of aligning a backup member.

  First, the structure of the screen printing apparatus will be described with reference to FIG. 1, FIG. 2, and FIG. In FIG. 1, the screen printing apparatus is configured by disposing a screen printing mechanism above a substrate positioning unit 1. The substrate positioning unit 1 is configured by stacking a Y-axis table 2, an X-axis table 3, and a θ-axis table 4, and further combining a first Z-axis table 5 and a second Z-axis table 6 thereon. Yes.

  The configuration of the first Z-axis table 5 will be described. Similarly, on the upper surface side of the horizontal base plate 4 a provided on the upper surface of the θ-axis table 4, the horizontal base plate 5 a is held up and down by an elevating guide mechanism (not shown). The base plate 5a is moved up and down by a Z-axis lifting mechanism configured to rotationally drive a plurality of feed screws 5c through a belt 5d by a motor 5b.

  A vertical frame 5e is erected on the base plate 5a, and a substrate transport mechanism 8 is held at the upper end of the vertical frame 5e. The substrate transport mechanism 8 includes two transport rails arranged in parallel to the substrate transport direction (X direction—the direction perpendicular to the paper surface in FIG. 1), and both end portions of the substrate 10 to be printed by these transport rails. It supports and conveys. By driving the first Z-axis table 5, the substrate 10 held by the substrate transport mechanism 8 can be lifted and lowered with respect to the screen printing mechanism described later together with the substrate transport mechanism 8. As shown in FIGS. 2 and 3, the substrate transport mechanism 8 extends to the upstream side (left side in FIGS. 2 and 3) and the downstream side, and the substrate 10 carried from the upstream side is transported by the substrate transport mechanism 8. Further, the substrate is positioned by the substrate positioning unit 1. Then, the substrate 10 after being printed by a screen printing mechanism to be described later is carried out downstream by the substrate transport mechanism 8.

  The configuration of the second Z-axis table 6 will be described. A horizontal base plate 6a is disposed between the substrate transport mechanism 8 and the base plate 5a so as to be movable up and down along a lifting guide mechanism (not shown). The base plate 6a is moved up and down by a Z-axis lifting mechanism configured to rotationally drive a plurality of feed screws 6c through a belt 6d by a motor 6b. On the upper surface of the base plate 6a, there is disposed a substrate lower receiving portion 7 having a lower receiving surface for holding the substrate 10 on the upper surface.

  By driving the second Z-axis table 6, the substrate receiving unit 7 moves up and down with respect to the substrate 10 held by the substrate transport mechanism 8. The substrate receiving portion 7 supports the substrate 10 from the lower surface side when the lower receiving surface of the substrate lower receiving portion 7 contacts the lower surface of the substrate 10. A clamp mechanism 9 is disposed on the upper surface of the substrate transport mechanism 8. The clamp mechanism 9 includes two clamp members 9a that are arranged opposite to each other on the left and right sides, and the substrate 10 is clamped and fixed from both sides by advancing and retracting the clamp member 9a on one side by the drive mechanism 9b.

  Next, the screen printing mechanism disposed above the substrate positioning unit 1 will be described. 1 and 2, a mask plate 12 is extended on the mask frame 11, and the mask plate 12 corresponds to the shape and position of the electrode 10a to be printed on the substrate 10 (see FIG. 3). Pattern holes 12a are provided. A squeegee head 13 is disposed on the mask plate 12, and the squeegee head 13 has a configuration in which a squeegee lifting mechanism 15 that lifts and lowers the squeegee unit 16 is disposed on a horizontal plate 14. A plate-like squeegee member 17 is detachably attached to the squeegee unit 16. By driving the squeegee raising / lowering mechanism 15, the squeegee unit 16 moves up and down, so that the squeegee member 17 contacts the upper surface of the mask plate 12. The squeegee elevating mechanism 15 is an elevating means for elevating the squeegee member 17.

  As shown in FIG. 2, guide rails 22 are arranged on the vertical frame 21 in the Y direction. Sliders 23 slidably fitted on the guide rails 22 are attached to both ends of the plate 14 via blocks 24. Are combined. Thereby, the squeegee head 13 is slidable in the Y direction. The plate 14 is horizontally moved in the Y direction by squeegee moving means comprising a nut 26, a feed screw 25, and a squeegee moving motor (not shown) that rotationally drives the feed screw 25.

  As shown in FIG. 3, a head X-axis moving mechanism 19 and a head Y-axis moving mechanism 20 are provided on the lower surface side of the mask plate 12. The head X-axis moving mechanism 19 includes a camera unit and a cleaning unit ( (Not shown) is attached. The camera unit includes a mask recognition camera that captures an image of the lower surface of the mask plate 12 and a substrate recognition camera that captures an image of the substrate 10, and is horizontally moved by the head X-axis moving mechanism 19 and the head Y-axis moving mechanism 20. Similarly, the cleaning unit is horizontally moved by the head X-axis moving mechanism 19 and the head Y-axis moving mechanism 20, and the lower surface of the mask plate 12 is cleaned by the cleaning paper.

  Next, the printing operation by the screen printing mechanism. This will be described with reference to FIG. First, when the substrate 10 is carried into the printing position by the substrate transport mechanism 8, as shown in FIG. 4A, the second Z-axis table 6 is driven to raise the substrate support 7, and the substrate 10 Underside the lower surface. In this state, the substrate 10 is sandwiched and fixed by the clamp member 9 a, and the substrate positioning unit 1 is driven to align the substrate 10 with the mask plate 12.

  Thereafter, as shown in FIG. 4B, the first Z-axis table 5 is driven to raise the substrate 10 together with the substrate receiving portion 7 so as to contact the lower surface of the mask plate 12. In this state, the squeegee member 17 is scraped by the squeegee member 17 by performing a squeegeeing operation that slides the squeegee member 17 on the mask plate 12 to which the cream solder 18 that is a paste is supplied. Thereby, the cream solder 18 is printed on the substrate 10 through the pattern hole 12a.

  Next, the structure of the squeegee unit 16 attached to the squeegee head 13 will be described with reference to FIGS. 5A, the squeegee lifting mechanism 15 disposed on the upper surface of the plate 14 has a lifting shaft 15a extending downward from the lower portion, and a mounting portion 15b is coupled to the lower end portion of the lifting shaft 15a. Has been. The squeegee unit 16 holding the squeegee member 17 is attached to the attachment portion 15b via a rectangular plate-like backup member 30.

A pair of squeegee units 16 having the same configuration are mounted on the squeegee head 13 in an opposite posture, and one of the squeegee units 16 is lowered according to the squeegeeing operation direction on the mask plate 12 to perform a screen printing operation. . That is, when the squeegeeing operation is performed in the direction of the arrow a, the left squeegee unit 16 is lowered, and when squeezing is performed in the direction of the arrow b, the right squeegee unit 16 is lowered and the squeezing operation is performed.

  By the way, in recent years, printing conditions for printing paste on a substrate by squeezing have been diversified depending on the types of substrates on which electronic components are mounted, that is, materials, thicknesses, and finer printing pitches. One of the parameters of this printing condition is the flexibility (easy to bend) of the squeegee member 17 in a state in which the lower end portion of the squeegee member 17 is pressed against the mask plate 12 and brought into sliding contact during the squeezing operation. That is, by making the squeegee member 17 slidably contact the mask plate 12 in a state where the squeegee member 17 is easily bent, the filling property of the paste into the pattern hole 12a can be improved. On the other hand, since the printing pressure for pressing the squeegee member 17 against the mask plate 12 is reduced and the scraping property of the paste is lowered, it is difficult to increase the squeezing speed. On the other hand, when the squeegee member 17 is slidably contacted with the mask plate 12 in a state in which it is difficult to bend, although the filling property of the paste into the pattern hole 12a is lowered, the printing pressure can be set large and the scraping property of the paste. It is possible to improve the squeezing speed.

  For this reason, when a plurality of types of substrates are required to be printed, it is desirable that the flexibility of the squeegee member 17 can be easily adjusted. It is desirable to be able to adjust flexibility without replacing 17 itself. In the squeegee unit 16 used in the screen printing apparatus shown in the present embodiment, as shown in FIG. 5B, the backup member 30 used together with the squeegee member 17 in the squeegee unit 16 coupled to the mounting portion 15b. The flexibility of the squeegee member 17 can be adjusted only by changing the mounting direction. The details of the configuration of the squeegee unit 16 and the method for adjusting the flexibility of the squeegee member 17 will be described below.

  FIG. 6A shows the squeegee unit 16 removed from the mounting portion 15b. The first member 27, the second member 28, and the backup member 30 excluding the squeegee member 17 from the squeegee unit 16 are the squeegee. A squeegee holder 16a that holds the member 17 and is coupled to the above-described lifting means is configured. As shown in FIG. 6B, the first member 27 coupled to the mounting portion 15b is in an overhanging state in the traveling direction of the squeegee member 17 in the squeegeeing operation (see arrow a shown in FIG. 5A). The 1st fastening surface 27a and the 1st holding surface 27b which inclined by are provided.

  The second fastening surface 28a provided on the second member 28 comes into contact with the first fastening surface 27a. In this state, the second member 28 is fastened to the first member 27 with the bolt 29, whereby the second fastening surface 28a is brought into contact with the first member 27. The member 28 is fastened to the first member 27. The second member 28 is provided with a second holding surface 28b. When the second member 28 is fastened to the first member 27, the second holding surface 28b is parallel to the first holding surface 27b. As shown in FIG. 6A, a predetermined mounting gap t is formed between the opposing holding surfaces 27b. The mounting gap t is set to the sum of the thickness t1 of the squeegee member 17 and the thickness t2 of the backup member 30.

That is, the squeegee holder 16a has a configuration in which the second member 28 is fastened to the first member 27 with the backup member 30 interposed between the second holding surface 28b and the first holding surface 27b. Yes. The second member 28 is configured to be detachable with respect to the first member 27, and in a state where it is coupled to the first member 27, the second member 28 faces the first holding surface 27 b and is larger than the thickness t 1 of the squeegee member 17. The second holding surface 28b that forms a mounting gap t that is larger by the thickness t2 of the backup member 30 is provided. The backup member 30 is interposed between the back surface 17 b side in the traveling direction of the squeegee member 17 and the first holding surface 27 b of the first member 27. The back surface 17b and the front surface 17a of the squeegee member 17 are defined as the front surface 17a when the squeegee member 17 is moved on the mask plate 12 to perform the squeegeeing operation, and the opposite direction side is defined as the back surface 17b. is doing.

  When the squeegee member 17 is held by the squeegee holder 16a, as shown in FIG. 6B, the back surface 17b side of the squeegee member 17 is held by the first holding surface 27b via the backup member 30, and the squeegee member 17 The first member 27 and the second member 28 are fastened with bolts 29 in a state where the front surface 17a side of the first member 17 is held by the second holding surface 28b. Thereby, the squeegee member 17 is fixed to the first member 27 coupled to the squeegee lifting mechanism 15. Accordingly, the bolt 29 holds the first member 27 and the second member 28 in a state where the backup member 30 and the front surface 17a side of the squeegee member 17 are held by the first holding surface 27b and the second holding surface 28b, respectively. By fastening, it functions as a fastening means for fixing the squeegee member 17 to the first member 27 via the backup member 30.

  Next, the cross-sectional shape and function of the backup member 30 will be described with reference to FIG. FIG. 7 shows a vertical cross-sectional shape of the rectangular plate-like backup member 30. That is, the vertical cross section of the backup member 30 has a rectangular shape having four corner portions SC1, SC2, SC3, and SC4, and among these four corner portions, the corner portions SC2 and SC3 that are diagonally located are Each is partially cut. Thereby, the non-contact part which does not contact the back surface 17b of the squeegee member 17 in the state which the backup member 30 was mounted | worn in the mounting gap t of the squeegee holder 16a on the 1st surface 30a and the 2nd surface 30b of the backup member 30. N1 and the non-contact part N2 are formed. By performing such corner cutting, a non-contact portion N1 having a non-contact dimension Ln1 is provided in the range from the corner portion SC2 to the edge portion E1 on the first surface 30a, and from the corner portion SC3 on the second surface 30b. A non-contact portion N2 having a non-contact dimension Ln2 larger than the non-contact dimension Ln1 is provided in a range up to the edge portion E2.

  By providing such a non-contact portion N in the backup member 30, when the squeegee member 17 is held in the squeegee holder 16a by holding the squeegee member 17, the extension of the squeegee member 17 is increased as described below. By changing, the flexibility of the squeegee member 17 can be adjusted according to appropriate printing conditions. That is, when it is required to minimize the flexibility of the squeegee member 17 when the squeegee member 17 contacts the mask plate 12, the mounting direction of the backup member 30 as shown in FIG. 8A is selected. . Here, the first surface 30a and the second surface 30b are brought into contact with the first member 27 and the squeegee member 17, respectively, and the corner portion SC1 faces downward and the corner portion SC4 is brought into contact with the upper end portion of the first holding surface 27b. The backup member 30 is interposed between the squeegee member 17 and the first member 27 in the attached mounting direction. In this case, since the non-contact portion is not provided in the corner portion SC1, the distance from the corner portion SC1 to the lower end portion of the squeegee member 17 is an extension in which the squeegee member 17 extends downward in a cantilever state. Departure La becomes.

  Next, when the extension allowance of the squeegee member 17 is desired to be larger than the extension allowance La, the mounting direction of the backup member 30 as shown in FIG. 8B is selected. Here, the second surface 30b and the first surface 30a are brought into contact with the first member 27 and the squeegee member 17, respectively, and the corner portion SC1 faces downward and the corner portion SC4 is brought into contact with the upper end portion of the second holding portion 28b. The backup member 30 is interposed between the squeegee member 17 and the first member 27 in the attached mounting direction. In this case, since the non-contact portion N1 in the range to the edge portion E1 is provided in the corner portion SC2 shown in FIG. 7, the distance from the edge portion E1 to the lower end portion of the squeegee member 17 is the squeegee member. 17 is an extension allowance Lb extending downward in a cantilever state. That is, the extension allowance Lb in this case is larger than the extension allowance La by the non-contact dimension Ln1 shown in FIG.

Further, when it is desired to make the extension allowance of the squeegee member 17 larger than the extension allowance Lb, the mounting direction of the backup member 30 as shown in FIG. 8C is selected. Here, the first surface 30a
In the mounting direction, the second surface 30b is brought into contact with the first member 27 and the squeegee member 17, respectively, and the corner portion SC4 is directed downward and the corner portion SC1 is brought into contact with the upper end portion of the second holding portion 28b. The backup member 30 is interposed between the squeegee member 17 and the first member 27. In this case, since the non-contact portion N2 in the range to the edge portion E2 is provided in the corner portion SC3 shown in FIG. 7, the distance from the edge portion E2 to the lower end portion of the squeegee member 17 is the squeegee member. 17 is an extension allowance Lc extending downward in a cantilever state. That is, the extension allowance Lc in this case is larger than the extension allowance La by the non-contact dimension Ln2 shown in FIG.

  By using the backup member 30 having such a cross-sectional shape for the squeegee holder 16a, even when the common squeegee member 17 and the backup member 30 are used, only by changing the mounting direction of the backup member 30, The extension allowance in which the squeegee member 17 extends in a cantilever state can be adjusted. In the above example, for the purpose of adjusting the extension allowance in three stages, out of the four corner portions SC1, SC2, SC3, and SC4 of the backup member 30, the non-contact portion N is provided in the two corner portions SC2 and SC3. I am trying to provide it. On the other hand, when the extension allowance is adjusted in two stages, the non-contact portion N may be provided only in one corner portion. Further, when the extension allowance is adjusted in four stages, non-contact portions N are provided at the three corner portions.

That is, in the above configuration, the shape of the vertical cross section of the backup member 30 in the state of being interposed in the mounting gap t is a rectangular shape having four corner portions SC1, SC2, SC3, SC4. At least two non-contact portions that are not in contact with the back surface 17b of the squeegee member 17 in a state of being interposed in the mounting gap t are provided with different non-contact dimensions for each corner portion. With this configuration, by changing the mounting direction when the backup member 30 is interposed in the mounting gap t of the squeegee holder 16a, the extension allowance for the squeegee member 17 to extend downward from the backup member 30 in a cantilever state is reduced. It is possible to change. As a processing method for providing the non-contact portion N in the backup member 30, as shown in the attached drawing of FIG. 7, the corner portion SC is cut by cutting into a square as shown in the attached drawing of FIG. The processing method can be selected as appropriate, such as a method of cutting and a method of cutting the corner portion SC by cutting into an arc shape.

  In addition, in the adjustment of the extension allowance of the squeegee member 17 described above, the backup member 30 is adjusted to the specified mounting direction corresponding to the desired extension allowance, and the relative position of the backup member 30 to the first member 27 is adjusted. It is necessary to align correctly. For the purpose of easily performing such alignment of the backup member 30 without error, an alignment fitting portion and a fitted portion as shown in FIG. 9 are provided in the backup member 30 and the first member 27. It may be.

  In the example shown here, as shown in FIG. 9A, relative alignment of the backup member 30 to the first member 27 is performed via an alignment member 32 having a shape in which a pin 32a is provided on a boss 32b. I am doing so. That is, a pin fitting hole 31 in which the pin 32 a is fitted is provided in the first holding surface 27 b of the first member 27, and a boss fitting hole 33 in which the boss 32 b is fitted is provided in the backup member 30. Prior to mounting the backup member 30 to the first member 27, the pin 32a is fitted into the pin fitting hole 31, and when the backup member 30 is mounted to the first member 27, the boss 32b is The backup member 30 is mounted while adjusting the position so as to fit in the fitting hole 33.

Here, since the backup member 30 is mounted on the first member 27 in three different mounting directions corresponding to the three stages of extension allowances, the three pin fitting holes 31 and the boss fitting holes 33 are respectively set to the first. The member 27 and the backup member 30 are provided. That is, the first holding surface 27b of the first member 27 is provided with pin fitting holes 31a, 31b, 31c, and the backup member 30 is provided with boss fitting holes 33a, 33b, 33c. The pin fitting holes 31a, 31b, 31c and the boss fitting holes 33a, 33b, 33c are provided at positions where the relative positions of the backup member 30 and the first member 27 shown in FIG. 8 are correctly reproduced. . These fitting holes are marked with markings indicating which extension allowance each corresponds to. When the extension allowance is designated, the worker specifies the fitting hole to be used according to these displays.

  That is, as shown in FIGS. 10A, 10B, and 10C, the vertical fitting positions of the pin fitting holes 31a, 31b, and 31c are from the lower end edge portion 27c at the lower end of the first holding surface 27b. Are provided at positions where the distances are a1, b1 and c1 (see FIG. 9B), and the boss fitting holes 33a, 33b and 33c are positions where the distances from the corner SC1 are a2, b2 and c2, respectively. (See FIG. 9C). Further, the lateral position is such that the pin fitting hole 31a and the boss fitting hole 33a, and the pin fitting hole 31b and the boss fitting when the backup member 30 is aligned with the first member 27 in the correct mounting direction. The hole 33b, the pin fitting hole 31c and the boss fitting hole 33c coincide with each other, and the pin fitting holes 31a, 31b, 31c and the boss fitting holes 33a, 33b, 33c do not interfere with each other. Select a position.

  In the above configuration, the alignment member 32 and the boss fitting holes 33a, 33b, and 33c in which the pin 32a is fitted into any of the pin fitting holes 31a, 31b, and 31c are the backup member 30 and the first holding surface 27b. The fitting part and the to-be-fitted part provided corresponding to the mounting direction of the backup member 30 are comprised. The combination of the alignment member 32 with the pin fitting hole 31a and the boss fitting hole 33a, the pin fitting hole 31b and the boss fitting hole 33b, and the pin fitting hole 31c and the boss fitting hole 33c is the backup member 30. When changing the mounting direction of the squeegee member 17 and changing the extension allowance of the squeegee member 17, the back-up member 30 and the first holding surface 27b are provided with a fitting portion and a fitted portion provided corresponding to the mounting direction of the backup member 30 By fitting the portions, it is a positioning means for matching the correct relative position of the backup member 30 to the first holding surface 27b.

  In addition, in the mounting state of the backup member 30, the numerical value of the extension allowance according to each mounting direction of the backup member 30 may be displayed at a position where it can be easily seen from the outside. For example, as shown in FIGS. 10A, 10 </ b> B, and 10 </ b> C, the back-up members 30 extend from the lower end edge portion 27 c of the first member 27 and can be visually recognized. , Lc is displayed by a method such as marking. Thereby, after performing the operation | work of the mounting direction change of the backup member 30, an operator can confirm the correctness of a mounting direction easily, and can prevent an erroneous operation reliably.

  As described above, in the squeegee holder shown in the present embodiment, the shape of the vertical section of the backup member 30 that is interposed in the mounting gap t of the squeegee holder 16a together with the squeegee member 17 is changed to four rectangular corner portions SC. The non-contact portion N that does not come into contact with the back surface 17b of the squeegee member 17 in a state of being interposed in the mounting gap t has a shape with a different non-contact dimension for each corner portion SC. Thereby, by changing the mounting direction when the backup member 30 is interposed in the mounting gap t, the extension allowance that the squeegee member 17 extends downward from the backup member 30 in a cantilevered state can be changed.

By adopting such a configuration, a single backup member 30 can be used for a plurality of types of substrates. Therefore, there is no need to prepare multiple types of backup members according to the type of substrate to be printed, and avoid an increase in management costs for storing equipment costs and selecting multiple types of backup members correctly according to the substrate type. be able to. Further, according to the above configuration, it is not necessary to perform a complicated operation of adjusting the position of the backup member while confirming the extension allowance according to the substrate type, and a desired extension allowance is selected by a simple operation,
Multiple types of printing conditions can be handled.

  The screen printing apparatus and the screen printing squeegee holder according to the present invention have an effect that a plurality of types of printing conditions can be handled with a simple operation without increasing the equipment cost and the management load, and the squeegee is applied to the substrate. This is useful for printing pastes such as cream solder and conductive paste.

1 is a front view of a screen printing apparatus according to an embodiment of the present invention. The side view of the screen printing apparatus of one embodiment of this invention The top view of the screen printing apparatus of one embodiment of this invention Operation explanatory diagram of a screen printing apparatus according to an embodiment of the present invention Structure explanatory drawing of the squeegee unit in the screen printing apparatus of one embodiment of this invention Structure explanatory drawing of the squeegee holder in the screen printing apparatus of one embodiment of this invention Shape explanatory drawing of the backup member used for the squeegee holder of the screen printing apparatus of one embodiment of this invention Explanatory drawing of the extension allowance change method of the squeegee member in the screen printing apparatus of one embodiment of this invention Explanatory drawing of the positioning method of the backup member to the squeegee holder in the screen printing apparatus of one embodiment of this invention Explanatory drawing of the positioning method of the backup member to the squeegee holder in the screen printing apparatus of one embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Substrate positioning part 10 Substrate 12 Mask plate 12a Pattern hole 13 Squeegee head 15 Squeegee raising / lowering mechanism 16 Squeegee unit 16a Squeegee holder 17 Squeegee member 27 First member 27b First holding surface 28 Second member 28b Second holding surface 30 Backup Member SC, SC1, SC2, SC3, SC4 Corner N, N1, N2 Non-contact part Ln1, Ln2 Non-contact dimension

Claims (4)

A substrate is brought into contact with a mask plate provided with a pattern hole, and a plate-like squeegee member is moved up and down by an elevating unit with respect to the mask plate supplied with paste, and this squeegee member is moved onto the mask plate by a squeegee moving unit. A screen printing apparatus that prints a paste on a substrate through the pattern hole by a squeezing operation that slides on
The squeegee holder that holds the squeegee member and is coupled to the elevating means is provided with a first holding surface that is coupled to the elevating means and is inclined in an overhanging state in the advancing direction of the squeegee member in the squeezing operation. A first member;
A second holding surface configured to be detachable with respect to the first member and forming a mounting gap larger than the thickness of the squeegee member so as to face the first holding surface in a state of being coupled to the first member. A second member provided with
A rectangular plate-like backup member interposed between a back side of the squeegee member in the traveling direction and the first holding surface;
By fastening the first member and the second member in a state in which the front side of the backup member and the squeegee member in the traveling direction is held on the first holding surface and the second holding surface, respectively. Fastening means for fixing the squeegee member to the first member via the backup member;
The shape of the vertical cross section of the backup member in the state of being interposed in the mounting gap is a rectangular shape having four corner portions, and at least two of the corner portions are interposed in the mounting gap. Non-contact portions that do not contact the back surface of the squeegee member in a state are provided with different non-contact dimensions for each corner portion,
The screen printing is characterized in that by changing a mounting direction when the backup member is interposed in the mounting gap, an extension allowance of the squeegee member extending downward in a cantilevered state from the backup member is changed. apparatus.   When changing the mounting direction of the backup member to change the extension allowance, the backup member and the first holding surface are fitted with fitting portions and fitted portions provided corresponding to the mounting direction. The screen printing apparatus according to claim 1, further comprising an alignment unit that aligns a correct relative position of the backup member with respect to the first holding surface. A pattern provided on the mask plate by a squeegeeing operation in which a plate-like squeegee member is moved up and down by an elevating unit with respect to the mask plate supplied with the paste, and the squeegee member is slid on the mask plate by a moving unit. In a screen printing apparatus for printing a paste on a substrate through a hole, a squeegee holder for screen printing that holds the squeegee member and is coupled to the elevating means,
A first member provided with a first holding surface coupled to the elevating means and inclined in an overhanging state in a moving direction of the squeegee member in the squeezing operation;
A second holding surface configured to be detachable with respect to the first member and forming a mounting gap larger than the thickness of the squeegee member so as to face the first holding surface in a state of being coupled to the first member. A second member provided with
A rectangular plate-like backup member interposed between a back side of the squeegee member in the traveling direction and the first holding surface;
By fastening the first member and the second member in a state in which the front side of the backup member and the squeegee member in the traveling direction is held on the first holding surface and the second holding surface, respectively. Fastening means for fixing the squeegee member to the first member via the backup member;
The shape of the vertical cross section of the backup member in the state of being interposed in the mounting gap is a rectangular shape having four corner portions, and at least two of the corner portions are interposed in the mounting gap. Non-contact portions that do not contact the back surface of the squeegee member in a state are provided with different non-contact dimensions for each corner portion,
The screen printing is characterized in that by changing a mounting direction when the backup member is interposed in the mounting gap, an extension allowance of the squeegee member extending downward in a cantilevered state from the backup member is changed. Squeegee holder.   When changing the mounting direction of the backup member to change the extension allowance, the backup member and the first holding surface are fitted with fitting portions and fitted portions provided corresponding to the mounting direction. 4. The squeegee holder for screen printing according to claim 3, further comprising an alignment means for aligning a correct relative position of the backup member with respect to the first holding surface.

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