JP5077466B2 - Screen printing system and screen printing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen printing system capable of performing simultaneous printing work efficiently for multiple substrates including substrates of various kinds, and a screen printing method using the same. <P>SOLUTION: In a screen printing device 2, which constitutes an electronic component packaging line 1 and which prints a paste for electronic component junction on a substrate, a substrate conveyance part 8 for conveying a substrate 5 forward and backward at will in the substrate conveyance direction is provided in between a first screen printing part 7A and a second screen printing part 7B positioned symmetrically in relation to the line centerline CL. This enables various substrate conveyance forms as needed, including return conveyance which returns the substrate 5 from the downstream device to upstream of the screen printing device 2, and bypass conveyance which conveys the substrate sent from upstream to the downstream device by passing the substrate through the screen printing device. Hence, simultaneous printing work can be efficiently executed for the multiple substrates 5 including substrates of various kinds. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention comprises an electronic component mounting line connected to the upstream side of an electronic component mounting apparatus for mounting electronic components on a substrate, and two screen printing devices for printing a paste for joining electronic components on the substrate in series. And a screen printing method using the screen printing system.

  The electronic component mounting line that manufactures mounting boards by mounting electronic components on a board is a screen printing device that prints soldering paste on electronic components, an electronic component mounting device that mounts electronic components on a printed substrate, etc. Are connected. In recent years, in the electronic industry, a large variety of small-quantity production has become the mainstream, and there is a demand for a facility configuration that has both high production efficiency and flexibility that can handle various production forms.

  In order to realize such a production facility, various characteristic mechanisms and configurations have been introduced in the devices constituting the layout of the electronic component mounting line and the electronic component mounting line. For example, a configuration (see Patent Document 1) including a plurality of substrate transport conveyors that can be operated independently is used for the purpose of improving the efficiency of transporting substrates and simultaneously transporting a plurality of substrates. As a result, a plurality of substrates can be produced at the same time, and the production efficiency is excellent. At the same time, a facility capable of producing a plurality of types of substrates and having excellent multi-product compatibility can be realized.

  Further, in order to produce a plurality of substrates at the same time, it is necessary to increase the processing capacity of the screen printing apparatus for supplying solder bonding paste to the substrates in accordance with the number of substrates produced. For this reason, a configuration in which a plurality of screen printing devices are arranged in series in the electronic component mounting line to increase the overall processing capacity (see Patent Document 2), or by simultaneously printing two substrates with the same mask plate Various mechanisms such as a method of increasing the number of processed sheets (see Patent Document 3) and a method of increasing the number of processed sheets by arranging independent screen printing mechanisms in series in the same apparatus are used.

Japanese Patent Laid-Open No. 4-129630 JP 2004-142299 A JP 2000-37847 A JP 2000-168040 A

  However, the prior art examples disclosed in Patent Documents 2 to 3 have the following problems. That is, in the examples shown in Patent Documents 2 and 3, since all of the substrates are transported by a single substrate transport path, the substrate transport after the printed substrate is sent to the electronic component mounting apparatus on the downstream side. The order is fixed, and it is difficult to supply necessary substrates to the downstream apparatus at necessary timing. For this reason, it is difficult to apply the configuration shown in the above-described prior art example to the mixed flow production in which different kinds of substrates are simultaneously flowed.

  In recent years, the mounting density has become higher, and the double-sided mounting form in which electronic components are mounted on the two front and back sides of the board has become normal, and the board that has been mounted on one side is returned to the upstream side of the screen printing apparatus. Work is required. However, in the conventional screen printing apparatus, such substrate transport work is often performed by manual transport by an operator, and labor saving is desired by complete automation of the substrate transport work. As described above, it is difficult for the screen printing apparatus used in the conventional electronic component mounting line to efficiently execute the printing operation simultaneously on a plurality of substrates including different types of substrates. There was a problem.

  Accordingly, an object of the present invention is to provide a screen printing system and a screen printing method capable of efficiently performing a printing operation simultaneously on a plurality of substrates including different types of substrates.

The screen printing system according to claim 1 , wherein a plurality of board transfer lanes for board transfer are arranged and connected to an upstream side of an electronic component mounting apparatus for mounting an electronic component on a board to constitute an electronic component mounting line, A screen printing system in which two screen printing apparatuses for printing a paste for bonding electronic components on a substrate are arranged in series, wherein the screen printing apparatus supplies a mask plate provided with pattern holes and a paste. At least one screen printing unit having a squeegee moving mechanism for sliding a squeegee on the mask plate, and the screen printing unit, and the substrate is positioned and held at a printing position by the screen printing unit. Passed through the substrate positioning unit and the substrate sent in parallel to the screen printing unit and sent to the downstream device A bypass conveyance path, and further provided between the upstream screen printing apparatus and the downstream screen printing apparatus, from the upstream bypass conveyance path to the downstream screen printing unit or upstream. A substrate distribution device that distributes the substrate from the screen printing unit on the side to the downstream bypass conveyance path, and in the substrate distribution device , the substrate of the first type printed by the screen printing unit on the upstream side is disposed on the downstream side. By distributing the second type of substrate transported to the bypass transport path and the upstream bypass transport path to the downstream screen printing section, a plurality of sheets including different types of substrates in the screen printing section can be obtained. A printing operation is performed simultaneously on a board, and the board of the first type is a plurality of board transfer lanes of the electronic component mounting apparatus. Chino passed to the identified substrate transport lane, the substrate of the second breed is passed to another of the identified substrate transport lane of a plurality of substrate conveyance lanes of the electronic component mounting apparatus.

The screen printing method according to claim 2 , wherein a plurality of board transfer lanes for board transfer are arranged and connected to an upstream side of an electronic part mounting apparatus for mounting electronic parts on a board to constitute an electronic part mounting line, A screen printing method using a screen printing system in which two screen printing devices for printing a paste for joining electronic components on a substrate are arranged in series, the screen printing device comprising: a mask plate provided with pattern holes; At least one screen printing unit having a squeegee moving mechanism for sliding a squeegee on the mask plate supplied with the paste, and the screen printing unit, and positioning the substrate at a printing position by the screen printing unit And a substrate positioning unit that is held in parallel with the screen printing unit. A bypass conveyance path for passing a substrate to be sent, and further provided between the upstream screen printing apparatus and the downstream screen printing apparatus, and downstream screen printing from the upstream bypass conveyance path. And a substrate distribution device that distributes the substrate from the upstream screen printing unit to the downstream bypass conveyance path, and in the substrate distribution device , the first type printed by the upstream screen printing unit By distributing the substrate to the downstream bypass conveyance path, and distributing the second type of substrate conveyed on the upstream bypass conveyance path to the downstream screen printing unit, different types of substrates are arranged in the screen printing unit. A printing operation is simultaneously performed on a plurality of included substrates, and the first type of substrate is a copy of the electronic component mounting apparatus. Passed to the specified substrate transfer lane of the substrate transport lane, the substrate of the second breed is passed to another of the identified substrate transport lane of a plurality of substrate conveyance lanes of the electronic component mounting apparatus .

  According to the present invention, by adopting a configuration in which a substrate transport unit that transports a substrate in the substrate transport direction is disposed between two screen printing units that are arranged symmetrically with respect to the line center line, the screen from the downstream device is provided. Various substrate conveyance modes as required, such as return conveyance for returning the substrate to the upstream side of the printing apparatus and bypass conveyance for conveying the substrate sent from the upstream side through the screen printing apparatus to the downstream apparatus Thus, it is possible to efficiently perform a printing operation simultaneously on a plurality of substrates including different types of substrates.

The top view which shows the structure of the electronic component mounting line of Embodiment 1 of this invention 1 is a plan view of a screen printing apparatus according to a first embodiment of the present invention. Sectional drawing of the screen printing apparatus of Embodiment 1 of this invention Sectional drawing of the screen printing part in the screen printing apparatus of Embodiment 1 of this invention Operation explanatory diagram of substrate conveyance operation in the screen printing apparatus of Embodiment 1 of the present invention Operation explanatory diagram of substrate conveyance operation in the screen printing apparatus of Embodiment 1 of the present invention The top view which shows the structure of the electronic component mounting line of Embodiment 2 of this invention Plan view of a screen printing apparatus according to a second embodiment of the present invention. Sectional drawing of the screen printing apparatus of Embodiment 2 of this invention Operation explanatory diagram of substrate conveyance operation in the screen printing apparatus of Embodiment 2 of the present invention Operation explanatory diagram of substrate conveyance operation in the screen printing apparatus of Embodiment 2 of the present invention Operation explanatory diagram of substrate conveyance operation in the screen printing apparatus of Embodiment 2 of the present invention The top view which shows the structure of the electronic component mounting line of Embodiment 3 of this invention Operation explanatory diagram of substrate conveyance operation in the screen printing apparatus of Embodiment 3 of the present invention Operation explanatory diagram of substrate conveyance operation in the screen printing apparatus of Embodiment 3 of the present invention Operation explanatory diagram of substrate conveyance operation in the screen printing apparatus of Embodiment 3 of the present invention

(Embodiment 1)
First, the configuration of the electronic component mounting line 1 will be described with reference to FIG. The electronic component mounting line 1 has a function of manufacturing an electronic component by mounting the electronic component on a substrate, and is simply abbreviated as “mounting device 3”. ) On the upstream side (left side in FIG. 1) is connected to a screen printing apparatus 2 (hereinafter simply referred to as “printing apparatus 2”) that prints a paste for joining electronic components on a substrate. In the description of the present specification, the subscripts (1), (2),... Attached to each device such as a printing device or a mounting device indicate the arrangement order from the upstream side of the electronic component mounting line of the device. It is.

  In the present embodiment, two mounting devices 3 (1) and 3 (2) arranged in series on the downstream side of one printing device 2 are connected. The printing apparatus 2 is provided with a substrate distribution device 4 (1) and a substrate distribution device 4 (2) on the upstream side and the downstream side, respectively, and the substrate conveyed from the upstream device is the substrate distribution device 4 (1 ) Is transferred to the printing apparatus 2 through the printer 2 and screen printed by the printing apparatus 2 is transferred to the mounting apparatus 3 (1) through the substrate distribution apparatus 4 (2).

  The printing apparatus 2 includes a first screen printing unit 7A and a second screen printing unit 7B having a function of printing an electronic component bonding paste on a substrate 5 to be mounted on an electronic component on a common base 6. The line center line CL of the mounting line 1 is arranged symmetrically in plan view. In the middle of the first screen printing unit 7A and the second screen printing unit 7B, there is disposed a substrate transport unit 8 that transports the substrate 5 in the substrate transport direction (X direction) in a reversible manner.

  Next, the configuration of the mounting device 3 will be described. Note that the mounting device 3 (1) and the mounting device 3 (2) have the same configuration, and only the mounting device 3 (1) will be described here with reference to the components. In the center of the base 11, three pairs of substrate transport rails 12 </ b> A, 12 </ b> B, and 12 </ b> C are arranged in parallel in the substrate transport direction (X direction). The substrate transport rails 12A, 12B, and 12C constitute three substrate transport lanes L1, L2, and L3 that transport the substrate 5 delivered from the printing device 2 via the substrate sorting device 4 (2). In the present embodiment, among the three substrate transport lanes L1, L2, and L3, only the substrate transport lanes L1 and L3 are provided with a mounting stage for positioning the substrate 5 at the mounting position and performing a mounting operation. The substrate transfer lane L2 located at the center functions as a return transfer path for transferring the substrate 5 from the downstream side toward the upstream side.

  Component supply units 13A and 13B are provided on the outer sides of the substrate transport rails 12A and 12B, respectively, and a plurality of tape feeders 14 are arranged in parallel on the component supply units 13A and 13B. The tape feeder 14 feeds an electronic component to a component pick-up position by a component mounting mechanism described below by pitch-feeding a carrier tape holding an electronic component mounted on the substrate 5. A Y-axis movement table 15 is disposed at the end of the base 11 on the X direction side. The two X-axis movement tables 16A and 16B coupled to the Y-axis movement table 15 are each equipped with a mounting head 17A. 17B are mounted. The mounting heads 17A and 17B include a plurality of unit mounting heads, and hold electronic components by vacuum suction using suction nozzles mounted on the unit mounting heads.

  By driving the Y-axis movement table 15 and the X-axis movement tables 16A and 16B, the mounting heads 17A and 17B move horizontally in the X direction and the Y direction. As a result, the mounting heads 17A and 17B suck and take out the electronic components from the tape feeders 14 of the component supply units 13A and 13B, respectively, and transfer and mount them on the substrate 5 positioned on the mounting stage of the substrate transport rails 12A and 12B. Component recognition cameras 18A and 18B are provided on the movement paths of the mounting heads 17A and 17B, and the component recognition cameras 18A and 18B holding the electronic components move above the component recognition cameras 18A and 18B. 18A and 18B recognize and image the electronic components held by the mounting heads 17A and 17B from below.

  Next, the structure of the printing apparatus 2 will be described with reference to FIGS. 2, 3, and 4. FIG. 3 shows an AA arrow view in FIG. 2, and FIG. 4 is a detailed cross-sectional view for explaining the structure of the first screen printing unit 7A and the second screen printing unit 7B. As shown in the cross section of FIG. 3, the printing apparatus 2 positions and holds the substrate 5 at the printing position on the first screen printing unit 7 </ b> A and the second screen printing unit 7 </ b> B arranged symmetrically on the base 6. A substrate positioning portion 21 is provided. Above the substrate positioning unit 21, a squeegee moving mechanism 37 that slides the squeegee 36 (see FIG. 4) of the squeegee unit 33 on the mask plate 32 provided with pattern holes and the mask plate 32 supplied with paste. Is arranged. The mask plate 32, the squeegee unit 33, and the squeegee moving mechanism 37 constitute a screen printing mechanism that prints paste on the substrate 5.

  With reference to FIG. 4, the detailed structure of the board | substrate positioning part 21, the squeegee unit 33, and the squeegee moving mechanism 37 is demonstrated. In FIG. 4, the substrate positioning unit 21 stacks a Y-axis table 22, an X-axis table 23 and a θ-axis table 24, and further combines a first Z-axis table 25 and a second Z-axis table 26 thereon. Configured. The configuration of the first Z-axis table 25 will be described. Similarly, on the upper surface side of the horizontal base plate 24 a provided on the upper surface of the θ-axis table 24, the horizontal base plate 25 a is held up and down by a lifting guide mechanism (not shown). The base plate 25a is moved up and down by a Z-axis lifting mechanism configured to rotationally drive a plurality of feed screws 25c via a belt 25d by a substrate moving Z-axis motor 25b. Two vertical frames 25e are erected on the base plate 25a, and a pair of substrate transport rails 28 constituting a substrate transport path are held at the upper end of the vertical frame 25e.

  The substrate transport rails 28 are 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 5 to be printed by the conveyor mechanism provided on these substrate transport rails 28. It supports and conveys. By driving the first Z-axis table 25, the substrate 5 held by the substrate transport rail 28 can be lifted and lowered with respect to the screen printing mechanism together with the substrate transport rail 28.

  The configuration of the second Z-axis table 26 will be described. A horizontal base plate 26a is disposed between the substrate transport rail 28 and the base plate 25a so as to be movable up and down along a lifting guide mechanism (not shown). The base plate 26a is lifted and lowered by a Z-axis lifting mechanism configured to rotationally drive a plurality of feed screws 26c via a belt 26d by a lower part lifting / lowering motor 26b. A substrate receiving portion 27 is detachably mounted on the upper surface of the base plate 26a. The substrate receiving part 27 receives and holds the substrate 5 transported to the printing position by the screen printing mechanism from below.

  In the printing operation by the first screen printing unit 7A and the second screen printing unit 7B, the substrate transport rail 28 receives the substrate 5 supplied from the upstream device via the distribution conveyors 41A and 41B of the substrate distribution device 4 (1). Then, carry it into the printing position by the screen printing mechanism and position it. And the board | substrate 5 after printing by the screen printing mechanism is carried out from a printing position by the board | substrate conveyance rail 28, and is delivered to the distribution conveyors 42A and 42B of the board | substrate distribution apparatus 4 (2).

  By driving the second Z-axis table 26, the substrate receiving portion 27 moves up and down with respect to the substrate 5 held on the substrate transport rail 28. The substrate receiving portion 27 supports the substrate 5 from the lower surface side when the lower surface of the substrate receiving portion 27 comes into contact with the lower surface of the substrate 5. A clamp mechanism 29 is disposed on the upper surface of the substrate transport rail 28. The clamp mechanism 29 includes two clamp members 29a that are arranged opposite to each other on the left and right sides. The clamp member 29a on one side is advanced and retracted by the drive mechanism 29b, thereby clamping and fixing the substrate 5 from both sides.

  Next, the structure of a screen printing mechanism that is disposed above the substrate positioning unit 21 and prints paste on the substrate conveyed to the printing position will be described. 2 and 4, a mask plate 32 is extended on a mask frame 31 held by a mask holder (not shown), and a pattern hole 32 a is provided in the mask plate 32 corresponding to a printing portion on the substrate 5. It has been. On the mask plate 32, a squeegee unit 33 is movably disposed by a squeegee moving mechanism 37.

  The squeegee unit 33 has a structure in which two squeegee lifting mechanisms 35 for raising and lowering a pair of squeegees 36 arranged opposite to each other are arranged on a horizontal moving plate 34. The squeegee unit 33 is moved forward and backward in the Y direction by a squeegee moving mechanism 37 having a structure in which a feed screw 37b rotated by the squeegee moving mechanism 37 is screwed onto a nut member 37c fixed to the lower surface of the moving plate 34. Move horizontally in the direction. In FIG. 2, the mask plate 32, the moving plate 34, the squeegee moving mechanism 37, etc. of the first screen printing unit 7A are omitted from the first screen printing unit 7A and the second screen printing unit 7B.

  As shown in FIG. 2, a head X-axis table 40X that is moved in the Y direction by a head Y-axis table 40Y is disposed above the substrate positioning unit 21. The head X-axis table 40X includes a camera head unit 38. A mask cleaning unit 39 is attached. The camera head unit 38 includes a substrate recognition camera 38a for imaging the substrate 5 from above and a mask recognition camera 38b for imaging the mask plate 32 from the lower surface side, and the mask cleaning unit 39 is the mask plate 32. A cleaning head for cleaning the lower surface of the head is provided.

  By driving the head X-axis table 40X and the head Y-axis table 40Y to move the camera head unit 38 and the mask cleaning unit 39 horizontally, the substrate 5 and the mask plate 32 can be recognized simultaneously. If necessary, the lower surface of the mask plate 32 can be cleaned. When these operations are not performed, the camera head unit 38 and the mask cleaning unit 39 are in a position retracted from the upper side of the substrate positioning unit 21 to the side.

  Next, the printing operation by the first screen printing unit 7A and the second screen printing unit 7B will be described. First, the substrate 5 to be printed is carried into the printing position by the substrate transport rail 28 and is aligned with the substrate receiving portion 27. Next, the second Z-axis table 26 is driven to raise the substrate receiving portion 27 and receive the lower surface of the substrate 5. Next, after the substrate positioning unit 21 is driven and the substrate 5 is aligned with the mask plate 32, the first Z-axis table 25 is driven to raise the substrate 5 together with the substrate transport rail 28, and the pattern hole 32a Is brought into contact with the lower surface of the mask plate 32 provided with

  Thereafter, the horizontal position of the substrate 5 is fixed by clamping the substrate 5 by the clamp mechanism 29. In this state, one of the two squeegees 36 is lowered and brought into contact with the mask plate 32. Next, the paste is printed on the substrate 5 through the pattern holes 32a by sliding the squeegee 36 in the squeezing direction (Y direction) on the mask plate 32 supplied with paste such as cream solder.

  As shown in FIGS. 2 and 3, on the upper surface of the base 6, the substrate transport unit 8 extends in the X direction along the line center line CL between the first screen printing unit 7 </ b> A and the second screen printing unit 7 </ b> B. It is arranged. The substrate transport unit 8 has a structure in which a substrate transport rail 8b having a substrate transport conveyor mechanism is held at the upper end of a frame 8a erected on the base 6, and the substrate transport rail 8b supports the substrate. 5 can be conveyed in both forward and reverse directions.

  That is, by driving the conveyor mechanism of the substrate transport rail 8b in the downstream direction, the substrate 5 supplied from the upstream device bypasses the first screen printing unit 7A and the second screen printing unit 7B, and goes to the downstream device. In this case, the substrate transport unit 8 functions as a bypass transport path for passing the substrate 5 sent to the downstream apparatus. In addition, by driving the conveyor mechanism of the substrate transport rail 8b in the upstream direction, the substrate 5 returned from the downstream device can be returned to the upstream side of the printing device 2, and in this case, the substrate transport unit 8 Functions as a return transport path for transporting the substrate returning from the downstream side of the electronic component mounting line 1 to the upstream side of the screen printing apparatus 2.

  The substrate distribution device 4 (1) attached to the upstream side and the downstream side of the printing apparatus 2 respectively includes distribution conveyors 41A, 41B, and 41C each having a substrate transfer conveyor mechanism. 2) includes sorting conveyors 42A, 42B, and 42C. These sort conveyors 41A, 41B, 41C and sort conveyors 42A, 42B, 42C are individually movable in the Y direction by a transport rail moving mechanism (not shown) (arrows a1, a2, a3, b1, b2 and b3).

  By the movement of these distribution conveyors in the Y direction, the substrate distribution device 4 (1) is connected to the substrate transport rails 28 of the first screen printing unit 7A and the second screen printing unit 7B in the normal state. A certain sort conveyor 41A, 41B can be connected with the board | substrate conveyance rail 8b of the board | substrate conveyance part 8 as needed. At this time, the sorting conveyor 41B retreats from the connection position with the substrate transport rail 8b. In the normal state, the sorting conveyor 41B that is connected to the substrate transfer unit 8 can be connected to the substrate transfer rails 28 of the first screen printing unit 7A and the second screen printing unit 7B as necessary. At this time, the sorting conveyors 41 </ b> A and 41 </ b> B are retracted from the connection position with the substrate transport rail 28.

  Furthermore, in the substrate distribution device 4 (2), the distribution conveyors 42A and 42B, which are connected to the substrate conveyance rails 28 of the first screen printing unit 7A and the second screen printing unit 7B in the normal state, are used as necessary. The substrate 5 after the printing operation is connected to the substrate transport rails 12A and 12B of the mounting device 3 (1) from the substrate positioning unit 21 of the first screen printing unit 7A and the second screen printing unit 7B by the downstream device. It can be delivered to a certain mounting device 3 (1).

  Next, a substrate transport operation in the printing apparatus 2 will be described with reference to FIGS. Here, the substrate 5 to be mounted is a double-sided mounting substrate on which electronic components are mounted on both the front and back surfaces, and the substrate 5 * after the component mounting operation on the back surface is completed is returned to the upstream side of the printing apparatus 2 The operation example in the case of using the board | substrate conveyance part 8 as a conveyance path is shown. That is, as shown in FIG. 5, the printing operation of the paste on the first surface (front surface) on which the mounting operation is first performed is performed by the screen printing unit (here, the first screen printing unit 7A) on one side of the printing apparatus 2. Therefore, the unworked new substrate 5 is carried into the sorting conveyor 41A connected to the substrate transport rail 28 of the first screen printing unit 7A (arrow c).

  The substrate 5 is transferred from the sorting conveyor 41A to the substrate positioning unit 21 of the first screen printing unit 7A (arrow d), where the printing operation is executed by the screen printing mechanism of the first screen printing unit 7A. The substrate 5 after the printing operation is transferred to the distribution conveyor 42A of the substrate distribution device 4 (2) (arrow e), and then the distribution conveyor 42A moves in the Y direction to move to the substrate conveyance rail 12A of the mounting device 3 (1). By connecting, the board | substrate 5 is handed over to the board | substrate conveyance lane L1 of the mounting apparatus 3 (1) (refer FIG. 1). Then, when the substrate 5 moves downstream along the substrate transport lane L1, a predetermined component mounting operation on the first surface is performed by the mounting device 3 (1) and the mounting device 3 (2) after the printing operation. This is performed on the substrate 5.

  Thereafter, the substrate 5 after the component mounting operation is further sent to a downstream reflow apparatus (not shown) and subjected to a predetermined reflow process, whereby the component mounting operation for the surface of the substrate 5 is completed. In this way, the substrate 5 on which the component mounting operation on the front surface is completed is reversed (front and back), and the second surface is a posture in which the back surface is directed to the upper surface (the substrate 5 * is described as a substrate with the front surface facing the upper surface). 5), the substrate is transferred in the upstream direction via the substrate transfer lane L2 of the mounting device 3 (1) and the mounting device 3 (2). Next, the substrate 5 * is transferred to the distribution conveyor 42C of the substrate distribution device 4 (2) (arrow f), and further transferred from the distribution conveyor 42C to the substrate transfer rail 8b of the substrate transfer unit 8 (arrow g). Then, the substrate 5 * conveyed to the upstream side of the printing apparatus 2 by the substrate conveying unit 8 performs a printing operation for the back surface, and therefore the substrate sorting apparatus 4 (1) performs the second screen printing unit 7B side. Shifted to.

  The shift conveyance of the substrate 5 * may be performed by a method (arrow h) in which the substrate 5 * transferred from the substrate conveyance unit 8 to the distribution conveyor 41C is transferred to the distribution conveyor 41B by a manual conveyance or transfer device. Further, the substrate 5 * may be shifted and conveyed by sliding the sorting conveyor 41C or the sorting conveyor 41B in the Y direction.

  That is, the sorting conveyor 41C that has received the substrate 5 * from the substrate transport unit 8 is moved to the second screen printing unit 7B side and connected to the substrate transport rail 28, and the substrate 5 * is received by the second screen printing unit 7B. You may make it pass. Alternatively, the substrate 5 * is received by the distribution conveyor 41B moved to the substrate transfer unit 8 side, the distribution conveyor 41B returned to the second screen printing unit 7B side is connected to the substrate transfer rail 28, and the substrate 5 * is connected to the second screen. You may make it deliver to the printing part 7B.

  Thereafter, the substrate 5 * is transferred to the substrate positioning unit 21 of the second screen printing unit 7B (arrow i), where the second screen printing unit 7B performs a printing operation. The substrate 5 * after the printing operation is transferred to the distribution conveyor 42B of the substrate distribution device 4 (2) (arrow j), and then the distribution conveyor 42B moves in the Y direction to move to the substrate conveyance rail 12B of the mounting device 3 (1). By connecting, the board 5 * is transferred to the board transfer lane L3 of the mounting apparatus 3 (1) (see FIG. 1). Then, when the substrate 5 * moves downstream along the substrate transport lane L3, the mounting device 3 (1) and the mounting device 3 (2) perform a predetermined component mounting operation on the back surface side after printing. Performed on substrate 5 *.

  FIG. 6 shows a board transfer operation in a state where the electronic component mounting work for the double-sided mounting board by the electronic component mounting line 1 is regularly executed. That is, on the first screen printing unit 7A side, the substrate 5 is transferred from the sorting conveyor 41A to the substrate transport rail 28 and positioned by the substrate positioning unit 21, and printing is performed on the substrate 5 in this state by the first screen printing unit 7A. Work is performed. The printed circuit board 5 is delivered to the downstream apparatus via the sorting conveyor 42A. Further, in the substrate transport unit 8, a substrate return transport operation is performed in which the substrate 5 * returned from the downstream device via the sorting conveyor 42C is transported to the upstream side and passed to the sorting conveyor 41C.

  Further, on the second screen printing unit 7B side, the substrate 5 * shifted and conveyed from the substrate conveyance unit 8 side is again input to the substrate positioning unit 21 via the substrate conveyance rail 28. Then, a printing operation by the second screen printing unit 7B is performed on the substrate 5 *. The printed circuit board 5 is delivered to the downstream apparatus via the sorting conveyor 42B. In the above configuration, the substrate sorting device 4 (1) re-injects the substrate 5 * returned to the upstream side of the screen printing device by the substrate transport unit 8 as a return transport path into the substrate positioning unit 21 of the printing device 2. It functions as a substrate re-input unit. Further, the substrate sorting device 4 (2) moves the substrate 5 between the substrate positioning unit 21 or the substrate transport unit 8 of the printing device 2 and the mounting device 3 that is a downstream device located downstream of the printing device 2. It functions as a board delivery section for delivery.

(Embodiment 2)
First, the configuration of the electronic component mounting line 1A will be described with reference to FIG. Similar to the electronic component mounting line 1 shown in the first embodiment, the electronic component mounting line 1A has a function of manufacturing an electronic component by mounting the electronic component on the substrate. On the upstream side, a printing apparatus 2A for printing a paste for joining electronic components on a substrate is connected. In the second embodiment, two mounting devices 3A (1) and 3A (2) that are similarly arranged in series are connected to the downstream side of two printing devices 2A that are arranged in series. It has a configuration.

  Then, for delivery of the substrate between these devices, the substrate distribution device 4A (1) is disposed upstream of the printing device 2A (1), and the substrate distribution device is disposed between the printing device 2A (1) and the printing device 2A (2). The apparatus 4A (2) is further provided with a substrate sorting apparatus 4A (3) on the downstream side of the printing apparatus 2A (2). That is, the substrate transported from the upstream device is carried into the printing device 2A (1) via the substrate sorting device 4A (1), and further carried into the printing device 2A (2) via the substrate sorting device 4A (2). Then, the substrate after the printing operation is performed by the printing device 2A (1) or the printing device 2A (2) is transferred to the mounting device 3 (1) via the substrate distribution device 4A (3).

  The printing apparatus 2A includes a first screen printing unit 7A and a second screen printing unit 7B having the same configuration and functions as those shown in the first embodiment, and the line center of the electronic component mounting line 1 on a common base 6. The line CL is arranged symmetrically in plan view. In the middle of the first screen printing unit 7A and the second screen printing unit 7B, a substrate transport unit 8A that transports the substrate 5 in the substrate transport direction (X direction) in a reversible manner is disposed.

  As shown in FIGS. 8 and 9, the substrate transport unit 8 </ b> A has a substrate transport rail 8 b provided with a conveyor mechanism for transporting a substrate at the upper end of a frame 8 a erected on the base 6 in parallel. The printing apparatus 2A is configured to include two substrate transfer lanes L1 and L2 for transferring the substrate 5 in the substrate transfer direction (X direction). That is, in the second embodiment, the substrate transport unit 8 includes a plurality of substrate transport lanes (substrate transport paths) that transport the substrate 5. And these several board | substrate conveyance lane becomes a form containing the conveyance path for bypass for allowing the board | substrate sent to a downstream apparatus to pass through so that it may mention later.

  The substrate distribution devices 4A (1) to (3) have the same configuration. As shown in FIG. 8, the substrate distribution device 4 (distribution conveyors 41C and 42C) located in the center is different from the configuration of the substrate distribution device 4 in the first embodiment. ) Is omitted. That is, the substrate distribution device 4A (1), the substrate distribution device 4A (2), and the substrate distribution device 4A (3) include distribution conveyors 41A and 41B, distribution conveyors 42A and 42B, and distribution conveyors 43A and 43B, respectively. These substrate sorting conveyors are movable in the Y direction.

  Next, the configuration of the mounting apparatus 3A will be described. The mounting apparatus 3A (1) and the mounting apparatus 3A (2) have the same configuration, and are different from the mounting apparatus 3 shown in the first embodiment in the configuration of the substrate transfer path disposed in the center in the substrate transfer direction (X direction). Except for the point, it has the same configuration as the mounting device 3. That is, two pairs of substrate transport rails 12A and 12B are arranged in parallel on the mounting device 3A, and the substrate transport rails 12A and 12B are respectively delivered from the upstream side via the substrate distribution device 4A (3). Substrate transport lanes L1 and L2 for transporting the substrate 5 are configured.

  In the substrate distribution device 4A (3), by moving the distribution conveyors 43A and 43B, the substrate conveyance lanes L1 and L2 of the mounting device 3A (1) and the substrate conveyance lanes L1 and L2 of the printing device 2A (2) In the meantime, the substrate 5 can be delivered via the sorting conveyors 43A and 43B. Similarly, by moving the sorting conveyors 43A and 43B, the substrate of the mounting device 3A (1) is moved from the substrate positioning unit 21 of the first screen printing unit 7A and the second screen printing unit 7B of the printing device 2A (2). The substrate 5 can be delivered to the transfer lanes L1 and L2. The substrate transport lanes L1 and L2 are provided with a mounting stage for positioning the substrate 5 at the mounting position and performing a mounting operation. The substrate 5 positioned on the mounting stage is the same as that of the first embodiment. The electronic component is transferred and mounted by a component mounting mechanism similar to the mounting device 3 shown.

  Next, with reference to FIG. 10, FIG. 11, and FIG. Here, an example of the substrate transfer operation in the case where two different types of substrates 5 (substrate 5A, substrate 5B) are simultaneously subjected to printing work is shown. FIG. 10 shows an outline of work divisions when printing work is performed by two printing apparatuses 2A (1) and 2A (2) for two types of boards 5A and 5B.

  That is, the substrate 5A and the substrate 5B are respectively classified and carried into the distribution conveyors 41A and 41B of the substrate distribution device 4A (1). Then, the substrate 5A is driven by the first screen printing unit 7A of either the printing device 2A (1) or the printing device 2A (2), and the substrate 5B is replaced by any one of the printing device 2A (1) or the printing device 2A (2). Printing operations are performed by the two-screen printing unit 7B. Here, when the printing apparatus 2A (1) is empty, the substrate 5A and the substrate 5B supplied from the upstream side are transferred to the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (1). Each is loaded and a printing operation is performed. After the printing is completed, the substrate 5A and the substrate 5B are transferred to the substrate transfer unit 8A of the printing apparatus 2A (2) via the substrate distribution apparatus 4A (2), and then bypass-transferred to the downstream side, and further the substrate distribution apparatus 4A. (3) is passed to the mounting device 3 which is a downstream device.

  When the printing apparatus 2A (1) is performing a printing operation, the substrate 5A and the substrate 5B supplied from the upstream side are transferred to the substrate transport unit of the printing apparatus 2A (1) via the substrate sorting apparatus 4A (1). 8A is bypassed to the downstream side, and is carried into the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (2) via the substrate sorting apparatus 4A (2), and printing is performed. Is done. Substrate 5A and substrate 5B after printing are transferred to mounting device 3 which is a downstream device via substrate distribution device 4A (3). That is, in the substrate transporting operation, the substrate sorting devices 4A (2) and (3) move the substrate 5 between the substrate positioning unit 21 or the substrate transporting unit 8 and the downstream device located on the downstream side of the printing device 2A. It functions as a board delivery section for delivery.

  Details of the above-described substrate transfer operation will be described with reference to FIGS. First, as shown in FIG. 11A, the substrate 5A and the substrate 5B are respectively loaded into the distribution conveyors 41A and 41B of the substrate distribution device 4A (1), and then as shown in FIG. 11B, these substrates 5A. The substrate 5B is carried into the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (1), and printing is performed here. At this time, in the substrate distribution device 4A (1), the distribution conveyors 41A and 41B that have received the new substrates 5A and 5B supplied from the upstream side move to the substrate conveyance unit 8A side of the printing device 2A (1). Then, the sorting conveyors 41A and 41B are connected to the substrate transfer lanes L1 and L2, respectively.

  Then, while the first screen printing unit 7A and the second screen printing unit 7B are performing the printing operation of the substrates 5A and 5B, as shown in FIG. 11C, the substrate conveyance lanes L1 and L2 of the substrate conveyance unit 8A are set. The substrate 5A and the substrate 5B are bypassed and transferred to the distribution conveyors 42A and 42B that have been moved to positions where they are connected to the substrate transfer lanes L1 and L2 of the substrate transfer unit 8A in the substrate distribution device 4A (2). , Hand over the substrate 5B. Next, as shown in FIG. 11 (d), the distribution conveyors 42A and 42B that have received these substrates 5A and 5B move to the first screen printing unit 7A and second screen printing unit 7B side of the printing apparatus 2A (2). Move each one.

  Thereafter, as shown in FIG. 12 (a), the substrates 5A and 5B are respectively carried from the sorting conveyors 42A and 42B to the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (2). The printing conveyor is executed, and the distribution conveyors 42A and 42B include a substrate 5A and a substrate after the printing operation is completed by the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (1). 5B is delivered. Next, as shown in FIG. 12B, the distribution conveyors 42A and 42B that have transferred the substrates 5A and 5B move to the substrate transfer unit 8A side of the printing apparatus 2A (2), and the substrate transfer lanes L1 and L2 respectively. Connected to L2. At this time, in the substrate distribution device 4A (1), new substrates 5A and 5B are carried into the distribution conveyors 41A and 41B.

  Next, as shown in FIG. 12C, the printed substrates 5A and 5B are transferred from the distribution conveyors 42A and 42B to the substrate conveyance lanes L1 and L2 of the substrate conveyance unit 8A of the printing apparatus 2A (2), respectively. Then, it is bypassed downstream. At the same time, new substrates 5A and 5B are transferred from the distribution conveyors 41A and 41B to the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (1), respectively, and printing is performed. . And as shown in FIG.12 (d), the board | substrate 5A and the board | substrate 5B after the printing operation by which the board | substrate conveyance part 8A of the printing apparatus 2A (2) was carried by bypass are the distribution conveyor 43A of the board | substrate distribution apparatus 4A (3), 43B, and further to the mounting device 3A, which is a downstream device. Thereafter, the same substrate transfer operation for the substrates 5A and 5B is repeatedly performed.

(Embodiment 3)
First, the configuration of the electronic component mounting line 1B will be described with reference to FIG. Similar to the electronic component mounting line 1 shown in the first embodiment, the electronic component mounting line 1B has a function of mounting an electronic component on a substrate to manufacture a mounting substrate, and a mounting device 3B for mounting the electronic component on the substrate. Is connected to a screen printing apparatus 2A for printing a paste for joining electronic components on a substrate. In the third embodiment, similarly to the second embodiment, two mounting devices 3B (1), which are similarly arranged in series, are mounted on the downstream side of the two printing devices 2A arranged in series. The device 3B (2) is connected.

  Then, for delivery of the substrate between these devices, the substrate distribution device 4A (1) is disposed upstream of the printing device 2A (1), and the substrate distribution device is disposed between the printing device 2A (1) and the printing device 2A (2). The apparatus 4A (2) is further provided with a substrate sorting apparatus 4A (3) on the downstream side of the printing apparatus 2A (2). These substrate sorting apparatuses 4A (1) to (3) have the same configuration as that shown in the second embodiment. The substrate conveyed from the upstream device is carried into the printing device 2A (1) via the substrate sorting device 4A (1), and further carried into the printing device 2A (2) via the substrate sorting device 4A (2). The substrate after the printing operation is performed by the printing device 2A (1) or the printing device 2A (2) is transferred to the mounting device 3B (1) via the substrate distribution device 4A (3).

  Next, the configuration of the mounting apparatus 3B will be described. The mounting apparatus 3B (1) and the mounting apparatus 3B (2) have the same configuration, and the mounting apparatus 3 shown in the first embodiment in the configuration of the substrate transfer path disposed in the center in the substrate transfer direction (X direction). Except for the difference, it has the same configuration as the mounting device 3. That is, the mounting apparatus 3B is provided with four pairs of substrate transport rails 12A, 12B, 12C, and 12D provided with a substrate transport conveyor mechanism in parallel, and the substrate transport rails 12A, 12B, 12C, and 12D are Substrate transport lanes L1, L2, L3, and L4 are configured to transport the substrate 5 delivered from the upstream side through the substrate sorting apparatus 4A (3).

  In the substrate distribution device 4A (3), by moving the distribution conveyors 43A and 43B, the substrate conveyance lanes L1, L2, L3, and L4 of the mounting device 3B (1) and the substrate conveyance lanes L1 and L2 of the printing device 2A The board | substrate 5 can be delivered now via distribution conveyor 43A, 43B. Similarly, by moving the distribution conveyors 43A and 43B, the substrate transfer lanes L1 and L2 of the mounting device 3A are moved from the substrate positioning units 21 of the first screen printing unit 7A and the second screen printing unit 7B of the printing device 2A, respectively. The substrate 5 can be delivered to L2 and L3. Each of the substrate transport lanes L1, L2, L3, and L4 is provided with a mounting stage for positioning the substrate 5 at the mounting position and performing a mounting operation. With respect to the substrate 5 positioned on the mounting stage, Electronic components are transferred and mounted by the same component mounting mechanism as the mounting device 3 shown in the first embodiment.

  Next, with reference to FIG. 14, FIG. 15, and FIG. 16, the board conveying operation in the printing apparatus 2A constituting the electronic component mounting line 1B will be described. Here, an example of substrate transport operation in the case where four different types of substrates 5 (substrate 5A, substrate 5B, substrate 5C, substrate 5D) are simultaneously subjected to printing work is shown. FIG. 14 shows an outline of work classifications when printing is performed by two printing apparatuses 2A (1) and 2A (2) for four types of substrates 5A, 5B, 5C, and 5D. Is.

  That is, these four types are divided into two groups of a substrate 5A, a substrate 5B, a substrate 5C, and a substrate 5D. New unprocessed substrates 5A and 5B are first carried into the distribution conveyor 41A of the substrate distribution device 4A (1), and the first screen printing unit 7A of either the printing device 2A (1) or the printing device 2A (2). The printing operation is performed by In addition, the unworked new substrates 5C and 5D are first carried into the sorting conveyor 41B, and a printing operation is performed by the second screen printing unit 7B of either the printing device 2A (1) or the printing device 2A (2). In other words, the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (1) and the printing apparatus 2A (2) individually perform printing operations for different types, thereby four types The printing operation is executed concurrently as a target.

  When two specific types of substrates (substrate 5A and substrate 5C in the example shown in FIG. 14) are the targets of printing work in the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (1). The substrate transport unit 8A of the printing apparatus 2A (1) bypass-transports the other two types (the substrate 5B and the substrate 5D to be printed by the printing apparatus 2A (2)) to the downstream side. Similarly, in the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (2), two specific types of substrates (substrate 5B and substrate 5D in the example shown in FIG. 14) are to be printed. When the printing apparatus 2A (2) is in the printing state, the board conveyance unit 8A bypasses and conveys the other two types (the board 5A and the board 5C that have been printed by the printing apparatus 2A (1)) to the downstream side. Then, the printed substrate 5A, substrate 5B, substrate 5C, and substrate 5D are all transferred to the specified substrate transport lane of the mounting device 3B (1), which is the downstream device, via the substrate distribution device 4A (3). Then, the electronic components are sequentially transferred and mounted on the substrate 5A, the substrate 5B, the substrate 5C, and the substrate 5D by each device in the process of the conveyance.

  Details of the above-described substrate transfer operation will be described with reference to FIGS. First, as shown in FIG. 15A, the substrate 5A and the substrate 5C are loaded into the distribution conveyors 41A and 41B of the substrate distribution device 4A (1), respectively, and then, as shown in FIG. 15B, these substrates 5A. The substrate 5C is loaded into the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (1), and printing is performed here. At this time, in the substrate distribution device 4A (1), the distribution conveyors 41A and 41B that have received new unworked substrates 5B and 5D from the upstream device go to the substrate transport unit 8A side of the printing device 2A (1). The distribution conveyors 41A and 41B are connected to the substrate transfer lanes L1 and L2, respectively.

  Then, while the first screen printing unit 7A and the second screen printing unit 7B are performing the printing operation of the substrates 5A and 5C, the substrate conveyance lanes L1 and L2 of the substrate conveyance unit 8A are set as shown in FIG. The substrate 5B and the substrate 5D are conveyed by bypass. Next, in the substrate distribution device 4A (2), the substrates 5B and 5D are transferred to the distribution conveyors 42A and 42B that have been moved to positions where they are connected to the substrate transfer lanes L1 and L2 of the substrate transfer unit 8A. Next, as shown in FIG. 15 (d), the distribution conveyors 42A and 42B that have received these substrates 5B and 5D are respectively connected to the first screen printing unit 7A and the second screen printing unit 7B side of the printing apparatus 2A (2). Move to.

  Thereafter, as shown in FIG. 16A, the substrates 5B and 5D are transferred from the sorting conveyors 42A and 42B to the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (2), respectively. The printing operation is executed. At the same time, the distribution conveyors 42A and 42B receive the substrates 5A and 5C after the printing operation is completed by the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (1). Next, as shown in FIG. 16B, the distribution conveyors 42A and 42B that have transferred the substrates 5A and 5C move to the substrate transfer unit 8A side of the printing apparatus 2A (2), and the substrate transfer lanes L1 and L2 respectively. Connected to L2. At this time, in the substrate distribution device 4A (1), new substrates 5A and 5C are carried into the distribution conveyors 41A and 41B from the upstream device.

  Next, as shown in FIG. 16 (c), the printed substrates 5A and 5C are transferred from the distribution conveyors 42A and 42B to the substrate conveyance lanes L1 and L2 of the substrate conveyance unit 8A of the printing apparatus 2A (2), respectively. Then, it is bypassed downstream. At the same time, new substrates 5A and 5C are transferred from the distribution conveyors 41A and 41B to the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (1), respectively, and the printing operation is executed. .

  And as shown in FIG.16 (d), the board | substrate 5A and the board | substrate 5C after the printing operation by which the board | substrate conveyance part 8A of the printing apparatus 2A (2) was carried by bypass are the distribution conveyor 43A of the board | substrate distribution apparatus 4A (3), 43B, and further delivered to a specific substrate transfer lane of the mounting apparatus 3A (1) which is a downstream apparatus. Further, the substrate 5B and the substrate 5D after the printing work by the first screen printing unit 7A and the second screen printing unit 7B of the printing apparatus 2A (2) are transferred to the distribution conveyors 43A and 43B of the substrate distribution apparatus 4A (3). Similarly, it is transferred to a specific substrate transfer lane of the mounting apparatus 3A (1). Thereafter, the same substrate transfer operation for four types of the substrate 5A, the substrate 5B, the substrate 5C, and the substrate 5D is repeatedly executed.

  In the third embodiment, the example in which the substrate transport unit 8A provided in the printing apparatus 2A (1) and the printing apparatus 2A (2) includes two substrate transport lanes L1 and L2 has been described. Three substrate transfer lanes may be provided in the substrate transfer unit 8A. As a result, one of the three substrate transfer lanes (for example, the substrate transfer path located at the center) is subjected to surface mounting operation in the same manner as in the first embodiment, and the two types of substrates 5A and substrates are reversed. It is possible to cause 5B to function as a return conveyance path that returns the downstream side to the upstream side. That is, in this case, the plurality of substrate conveyance paths provided in the substrate conveyance unit 8A include a return conveyance path that conveys a substrate that returns from the downstream side of the electronic component mounting line to the upstream side of the screen printing apparatus. It has become.

  In this case, the substrate 5C and the substrate 5D in the above-described substrate transfer operation example correspond to the substrates 5A and 5B which are reversed, and the four types of printing operations, that is, both the front and back surfaces of the two types of substrates 5 are targeted. Is performed by the first screen printing unit 7A and the second screen printing unit 7B of the printing device 2A (1) and the printing device 2A (2), respectively. In this configuration, the substrate distribution device 4A (1) and the substrate distribution device 4A (2) re-inject the substrate returned to the upstream side of the screen printing device through the return conveyance path into the substrate positioning unit. Functions as an input unit.

  As shown in the first, second, and third embodiments, the screen printing apparatus of the present invention has a circuit board between two screen printing units arranged symmetrically in plan view with respect to the line center line of the electronic component mounting line. Is provided with a substrate transport unit that transports the substrate in the substrate transport direction. Thereby, various board | substrate conveyance forms according to the work path | route of the board | substrate in an electronic component mounting line are attained.

  For example, as shown in the example of the first embodiment, the substrate transport unit 8 is used as a return transport path for transporting a substrate returning from the downstream side of the electronic component mounting line to the upstream side of the screen printing apparatus, thereby providing a double-sided mounting substrate. In the case where the substrate is mounted, the substrate transfer operation for returning the substrate on which the mounting operation on the first surface side has been completed to the upstream side of the screen printing apparatus is performed without using a separate transfer means by the substrate transfer function of the electronic component mounting line itself. Can be done.

  Further, a plurality of screen printings can be performed by using the substrate transport unit 8 as a bypass transport path that transports the substrate supplied from the upstream side of the electronic component mounting line to the downstream side without passing through the screen printing unit of the screen printing apparatus. In the configuration in which the apparatuses are arranged in series, the substrate can be carried into a desired screen printing apparatus at a necessary timing, and the printed substrate can be carried out from the desired screen printing apparatus at a necessary timing. Therefore, the degree of freedom of the substrate transfer mode is greatly improved as compared with the conventional screen printing apparatus in which the substrate is transferred by a single substrate transfer path and the substrate transfer order is fixed.

  Further, as shown in the second and third embodiments, by providing a substrate transport unit 8A having a plurality of substrate transport lanes, printing work by the screen printing unit can be performed while simultaneously transporting a plurality of different types of substrates. It can be a target, and it is possible to cope with mixed flow production in which different kinds of substrates are simultaneously flowed. As described above, by using one of the plurality of substrate transport lanes as a return transport path, it is possible to efficiently mount a plurality of types of double-sided mounting substrates using the same electronic component mounting line. Can be executed.

  INDUSTRIAL APPLICABILITY The screen printing system and the screen printing method of the present invention have an effect that a printing operation can be efficiently performed simultaneously on a plurality of substrates including different types of substrates, and electronic components are mounted on the substrates. This is useful in the field of electronic component mounting in which a mounting board is manufactured by mounting.

1, 1A, 1B Electronic component mounting line 2, 2A Printing device (screen printing device)
3, 3A, 3B mounting device (electronic component mounting device)
4, 4A Substrate sorting device 5, 5A, 5B, 5C, 5D Substrate 7A First screen printing unit 7B Second screen printing unit 8, 8A Substrate transport unit 8b Substrate transport rail 12A, 12B, 12C Substrate transport rail 21 Substrate positioning unit 32 Mask plate 33 Squeegee unit 36 Squeegee 37 Squeegee moving mechanism L1, L2, L3, L4 Substrate transport lane

Claims (2)

Multiple board transfer lanes for board transfer are arranged and connected to the upstream side of the electronic component mounting apparatus for mounting electronic components on the board to form an electronic component mounting line, and the electronic component bonding paste is printed on the board A screen printing system comprising two screen printing devices arranged in series,
The screen printing apparatus includes at least one screen printing unit having a mask plate provided with a pattern hole, and a squeegee moving mechanism that slides a squeegee on the mask plate supplied with paste;
A substrate positioning unit provided in the screen printing unit and positioning and holding the substrate at a printing position by the screen printing unit;
Provided in parallel with the screen printing unit, and includes a bypass conveyance path for passing a substrate to be sent to a downstream device,
Furthermore, it is provided between the upstream screen printing apparatus and the downstream screen printing apparatus, and is used for the bypass from the upstream bypass conveyance path to the downstream screen printing section or from the upstream screen printing section to the downstream. A substrate sorting device that sorts the substrate to the conveyance path,
In the substrate sorting apparatus , the first type of substrate printed by the upstream screen printing unit is distributed to the downstream bypass transport path, and the second type of substrate is transported through the upstream bypass transport path. Is distributed to the downstream screen printing unit, the screen printing unit simultaneously performs a printing operation for a plurality of substrates including different types of substrates, and the first type of substrate is the electronic device. Passed to the specified substrate transfer lane among the plurality of substrate transfer lanes of the component mounting device, and the second type of substrate is another specified substrate of the plurality of substrate transfer lanes of the electronic component mounting device A screen printing system which is passed to a conveyance lane . Multiple board transfer lanes for board transfer are arranged and connected to the upstream side of the electronic component mounting apparatus for mounting electronic components on the board to form an electronic component mounting line, and the electronic component bonding paste is printed on the board A screen printing method using a screen printing system comprising two screen printing devices arranged in series,
The screen printing apparatus includes at least one screen printing unit having a mask plate provided with a pattern hole, and a squeegee moving mechanism that slides a squeegee on the mask plate supplied with paste;
A substrate positioning unit provided in the screen printing unit and positioning and holding the substrate at a printing position by the screen printing unit;
Provided in parallel with the screen printing unit, and includes a bypass conveyance path for passing a substrate to be sent to a downstream device,
Furthermore, it is provided between the upstream screen printing apparatus and the downstream screen printing apparatus, and is used for the bypass from the upstream bypass conveyance path to the downstream screen printing section or from the upstream screen printing section to the downstream. A substrate sorting device that sorts the substrate to the conveyance path,
In the substrate sorting apparatus , the first type of substrate printed by the upstream screen printing unit is distributed to the downstream bypass transport path, and the second type of substrate is transported through the upstream bypass transport path. Is distributed to the downstream screen printing unit, the screen printing unit simultaneously performs a printing operation for a plurality of substrates including different types of substrates, and the first type of substrate is the electronic device. Passed to the specified substrate transfer lane among the plurality of substrate transfer lanes of the component mounting device, and the second type of substrate is another specified substrate of the plurality of substrate transfer lanes of the electronic component mounting device A screen printing method, wherein the screen printing method is passed to a conveyance lane .

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