JP6001494B2 - Backup pin, substrate support device, substrate processing device - Google Patents

Description

  The present invention relates to a technique for supporting a printed circuit board.

  Conventionally, various substrate processing devices such as printers, dispensers, surface mounters, reflow devices, etc. are arranged in a line to build a production line, and solder paste printing processing, adhesive coating processing, electronic It is widely performed to manufacture a mounting board by sequentially performing component mounting processing, substrate inspection processing, and reflow processing. In this type of substrate processing apparatus, a substrate support device is provided to prevent the printed circuit board from being bent when performing a printing process, a coating process, and a mounting process.

  The substrate support device includes a support table that can be raised and lowered, and a backup pin disposed on the support table, and has a structure in which the printed circuit board is supported from below by the backup pin. According to the substrate support apparatus described in Patent Document 1 below, the holder plate is provided on the support table. The holder plate has a structure in which pin fixing holes are formed in a matrix, and a backup pin can be fixed by inserting a pin end into the pin fixing hole. By providing such a holder plate, it is possible to prevent the backup pin from falling down and to increase the accuracy of the fixed position of the backup pin.

JP 2007-19218 A

  By the way, depending on the specification, there is a substrate support device that is not equipped with a holder plate (hereinafter referred to as a positioning plate). Conventionally, there are a substrate support device that is not equipped with a positioning plate and a substrate support device that is equipped with a positioning plate. We used separate backup pins. The reason is that, in order to increase the arrangement density of the backup pins, it is necessary to make the positioning hole formed in the positioning plate as small as possible. Therefore, the backup plate for the positioning plate has a small diameter at the lower end. . Therefore, when this backup pin is directly arranged on the support table, the pin diameter at the lower end is too small and the posture is not stable.

Changing the type of backup pin used according to the presence or absence of the positioning plate increases the number of pins held. Therefore, it has been required to use a common backup pin.
The present invention has been completed based on the above-described circumstances, and an object thereof is to share a backup pin regardless of the presence or absence of a positioning plate.

  The present invention is a backup pin for supporting a printed circuit board, which is disposed on a base provided in a board support device, and is positioned against a positioning hole formed in a positioning plate that is detachably mounted on the base. Forming a small-diameter portion to be fitted on the lower end side, and a backup pin body whose tip side is a support portion for supporting the printed circuit board, and detachably attached to the small-diameter portion of the backup pin body, In the case where the backup pin main body is disposed on the base without using a positioning plate, the backup pin main body is provided with a posture stabilizing member that stabilizes the backup pin main body in an upright posture with respect to the base.

  In this invention, when the positioning plate is used, the posture stabilizing member is removed and the backup pin main body is used alone. When the positioning plate is not used, the posture stabilizing member is attached to the backup pin main body and used. The backup pin body can be used in common both when and when not in use.

The following configuration is preferable as an embodiment of the present invention.
The posture stabilizing member includes a metal body having a shaft hole through which the small-diameter portion is fitted penetratingly formed in the center portion, and an adhesion ring made of an elastic material attached to the inner peripheral surface of the shaft hole and closely contacting the small-diameter portion With. It has higher adhesion than metal-to-metal fitting and is easy to remove. Moreover, even if it wears out, it is only necessary to replace the contact ring, so that the cost merit is high.

-A magnet is attached with respect to the accommodating part formed in the lower end surface of the said backup pin main body. Since the backup pin can be fixed to the base with a magnetic force, the backup pin is not easily toppled and is not easily displaced.

-Only the lower end surface of the backup pin main body is brought into contact with the base, and the magnet side is not in contact. If priority is given to fixing the pin to the base, it is better to bring the magnet into contact with the base. However, when the magnet is brought into contact with the base, the height position of the pin tip depends on the position of the bottom surface of the magnet, so if there is an error in the magnet mounting position with respect to the backup pin body, the support position of the printed circuit board will vary. There is a problem. In this regard, in this configuration, the magnet is not brought into contact with the base, and the support position of the printed circuit board is determined (dependent) only by the height of the backup pin body. The back-up pin body has high processing accuracy and small variations in height, so that it is possible to reduce “variations” in the support position of the printed circuit board.

  According to the present invention, the backup pin body can be commonly used both when the positioning plate is used and when it is not used.

The perspective view which shows the surface mounting machine in one Embodiment of this invention The figure which shows the support structure of the head unit Perspective view of substrate support device (when using positioning plate) Exploded perspective view of backup pin Cross section of backup pin Vertical sectional view of substrate support device Sectional view showing support structure of backup pin to base (when using positioning plate) Top view of positioning plate Perspective view of substrate support device (when positioning plate is not used) Sectional view showing support structure of backup pin to base (when positioning plate is not used) Front view of substrate support apparatus (view of FIG. 3 viewed from direction A) The figure which shows the modification of the backup pin The figure which shows the modification of the backup pin

<Embodiment 1>
1. Overall Structure of Surface Mounter 1 Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a plan view of a surface mounter, and FIG. 2 is a view showing a support structure of a head unit. The surface mounting machine (corresponding to the “substrate processing apparatus” of the present invention) 1 is an apparatus for mounting an electronic component B on a printed circuit board (hereinafter simply referred to as a substrate) P. As shown in FIG. Various devices (transport conveyor 20 for transporting substrate P, substrate support device 30 for supporting substrate P, mounting work device for mounting electronic component B on substrate P ("execution unit" of the present invention) on flat base 10 Equivalent to 100).

  In the following description, the longitudinal direction of the base 10 (the left-right direction in FIG. 1) is referred to as the X direction, and the Y direction and the Z direction are defined in the directions in FIGS. Further, in FIG. 1, the description will be made assuming that the right hand side is the upstream side (loading side of the substrate P to be worked) and the left hand side is the downstream side (loading side of the worked substrate P).

  The base 10 has a rectangular shape that is long in the X direction, a transport conveyor (hereinafter simply referred to as a conveyor) 20 is disposed in the center, and a carry-in conveyor 12 is provided at the right end of the base 10 on the upstream side. A carry-out conveyor 13 is arranged at the left end of the base 10 corresponding to the above. These three conveyors 12, 13, and 20 are continuous with each other without any step, and are configured so that the substrate P to be worked can be sequentially sent in the X direction (from the right side to the left side in FIG. 1).

  A substrate stopper 25 that can be moved up and down is provided on the base 10, and the substrate P sent in the X direction by the conveyor 20 is stopped at the mounting work position in the center of the base. A substrate support device 30 is provided in the center of the base so that the printed circuit board P stopped at the mounting work position is supported from below. The structure of the substrate support device 30 will be described in detail with reference to FIGS. 3, 7, 11, and the like.

  Further, on the base 10, component supply units 80 are provided at four locations around the mounting work position, and feeders 85 as component supply devices are installed in an aligned manner in the X direction. Each feeder 85 includes a reel (not shown) around which a component supply tape is wound, an electric delivery device (not shown) that pulls out the component supply tape from the reel, and the like.

  Electronic components B are held on the component supply tape at regular intervals. When the delivery device is driven, the electronic components B are supplied one by one as the component supply tape is pulled out. The supplied electronic component B is mounted on the substrate P backed up at the mounting work position by the mounting work device 100 described below.

  A pair of component recognition cameras 95 is installed on both sides of the conveyor 20 in the Y direction on the base 10. This component recognition camera 95 is for photographing the electronic component B sucked and held by the suction head 185.

  The mounting work device 100 includes a suction head 185 that sucks and holds the electronic component B and a moving device 130. The moving device 130 is a Cartesian coordinate robot having three XYZ orthogonal drive shafts, and the suction head 185 is moved to an arbitrary position on the base 10 by driving these three drive shafts in combination. To do.

  Specifically, as shown in FIG. 1, a pair of support legs 141 are installed on the base 10. Both support legs 141 are located on both sides (both sides in the X direction) of the mounting work position, and both extend straight in the Y direction (up and down direction in FIG. 1).

  Both support legs 141 are provided with guide rails (Y direction guide shafts) 142 extending in the Y direction on the upper surfaces of the support legs, and head support bodies 151 are fitted to both the left and right guide rails 142 at both ends in the longitudinal direction. Is attached.

  In FIG. 1, a Y-axis ball screw shaft (Y-direction drive shaft) 145 extending in the Y direction is mounted on the right support leg 141, and a ball nut (not shown) is screwed onto the Y-axis ball screw shaft 145. Has been. A Y-axis motor 147 is provided at the shaft end of the Y-axis ball screw shaft 145.

  When the Y-axis motor 147 is energized, the ball nut advances and retreats along the Y-axis ball screw shaft 145. As a result, the head support 151 fixed to the ball nut, and thus the head unit 160 described below, extends along the guide rail 142. And move horizontally in the Y direction (Y-axis servo mechanism).

  As shown in FIG. 2, a guide member (X direction guide shaft) 153 extending in the X direction is installed on the head support 151, and the head unit 160 is movably attached to the guide member 153. . An X-axis ball screw shaft (X-direction drive shaft) 155 extending in the X direction is attached to the head support 151, and a ball nut is screwed onto the X-axis ball screw shaft 155.

  An X-axis motor 157 is provided at the shaft end of the X-axis ball screw shaft 155. When the X-axis motor 157 is energized, the ball nut advances and retreats along the X-axis ball screw shaft 155. The head unit 160 fixed to the ball nut moves in the X direction along the guide member 153 (X-axis servo mechanism).

  Therefore, the head unit 160 can be moved and operated in the horizontal direction (XY direction) on the base 10 by controlling the X-axis servo mechanism and the Y-axis servo mechanism in combination.

  The head unit 160 is provided with suction heads 185 in a line. Each suction head 185 can be moved in the Z direction by a Z-axis servo mechanism (not shown) formed of a Z-axis ball screw. A suction nozzle 186 is provided at the tip of each suction head 185 so as to generate a suction force at the head tip. From the above, the electronic component B is removed from the component supply unit 80 by appropriately moving the suction head 185 while reciprocating the head unit 160 between the component supply unit 80 and the mounting work position in the center of the base. The electronic component B that can be taken out can be mounted on the substrate P backed up at the mounting work position.

2. Structure of Substrate Support Device The substrate support device 30 performs a function of supporting the printed circuit board P stopped at the mounting work position from below. As shown in FIG. 3, a base 31, a support table 35 that supports the base 31, The positioning plate 40, the backup pin 50, and the lifting device 70 are configured.

  The backup pin 50 is disposed vertically on the base 31 and functions to support the printed circuit board P from below. As shown in FIG. 4, the backup pin 50 includes a backup pin main body 51 and a posture stabilizing member 60. The backup pin main body 51 is a stepped pin having a shape that is long in the vertical direction. A small-diameter portion (small-diameter portion having a smaller diameter than the trunk portion 52) 53 is formed on the lower side of the trunk portion 52, and the upper-side (tip side) is formed. A support portion 55 is formed. The support part 55 has a smaller diameter than the small diameter part 53 and extends straight upward. The support part 55 fulfill | performs the function which supports the printed circuit board P, and an upper end surface is a horizontal support surface.

  The small-diameter portion 53 is a counterpart of the positioning hole 43 formed in the positioning plate 40 and is configured to fit into the positioning hole 43 without a gap. In addition, an accommodating portion 44 is formed on the end surface of the small diameter portion 53. The accommodating portion 44 opens downward, and a magnet 45 is attached inside (see FIG. 5).

  The posture stabilizing member 60 includes a metal block 61 (corresponding to the “metal body” of the present invention) 61 and a contact ring 65. The metal block 61 has a cylindrical shape, and a shaft hole 63 penetrating vertically is formed at the center. The shaft hole 63 corresponds to the small diameter portion 53 of the backup pin 50. Therefore, the posture stabilizing member 60 can be attached to the lower portion of the backup pin main body 51 by fitting the small diameter portion 53 into the shaft hole 63. The contact ring (seal ring) 65 is made of an elastic member such as rubber, and is attached to two locations on the inner peripheral side of the shaft hole 63 formed in the metal block 61, as shown in FIG. Yes. In the state where the small diameter portion 53 is fitted to the shaft hole 63, the contact ring 65 is in close contact with the outer periphery of the small diameter portion 53 while being elastically deformed. Can be installed without rattling.

  Since the posture stabilizing member 60 has a structure in which the small-diameter portion 53 is simply fitted into the shaft hole 63 as described above, it can be easily detached from the backup pin main body 51 by releasing the fitting. The posture stabilizing member 60 is detachable in this way because the positioning plate 40 described below can be selected by the user as to whether or not the positioning plate 40 is used. This is because the backup pin main body 51 is commonly used when 40 is not used.

  An advantage of using the positioning plate 40 is that the backup pin 50 can be positioned at a predetermined location. As a disadvantage, the position of the backup pin 50 cannot be adjusted. For example, when backing up the double-sided mounting type printed circuit board P, the backup pin 50 may interfere with components.

  As shown in FIG. 3, the positioning plate 40 is a metal plate having a shape substantially equal to the size of the base 31, and a flange 41 that is bent downward is formed around the positioning plate 40. Magnets 35 are fixed to the four corners of the lower surface of the positioning plate 40 via holders 33. The positioning plate 40 is fixed to the base 31 by the magnetic force of the magnet 35 (FIG. 6). reference). Therefore, the positioning plate 40 can be easily removed by pulling the positioning plate 40 away from the base 31 against the magnetic force of the magnet 35.

  A guide pin 37 is provided on the base 31, and a guide hole 47 is formed in the positioning plate 40. By fitting the guide pin 37 into the guide hole 47, the guide pin 37 is fitted to the base 31. The positioning plate 40 can be positioned.

  Returning to FIG. 3 and continuing the description, a positioning hole 43 is formed through the plate surface of the positioning plate 40. The positioning hole 43 is a counterpart of the small-diameter portion 53 formed at the rear end of the backup pin 50, and is sized to fit the small-diameter portion 53 without a gap.

  When the positioning plate 40 is used, the backup pin main body 51 is used alone. That is, as shown in FIGS. 3 and 7, the backup pin main body 51 is vertically oriented on the base 31 so that the small diameter portion 53 is inserted into the positioning hole 43 of the positioning plate 40 mounted on the base 31. Installing. As shown in FIG. 7, the mounted backup pin main body 51 is in a state where the lower end surface of the small-diameter portion 53 comes into contact with the base and stands on the base, and further, on the base 31 by the magnetic force of the magnet 45. Fixed. Further, the position of the upper surface of the positioning plate 40 is set lower than the lower end position (stepped portion) of the body 52 of the backup pin main body 51, and the positioning plate 40 and the backup pin main body 51 are set so as not to interfere in the vertical direction. ing.

  In the present embodiment, the positioning holes 43 are formed in 13 vertical rows and 29 horizontal rows with respect to the positioning plate 40. When the positioning plate 40 is used, a maximum of 377 backup pins 50 on the base 31. Can be attached. Further, on the positioning plate 40, as shown in FIG. 8, addresses (A to M, 1 to 29) are allocated to the vertical columns and the horizontal columns, respectively. Thus, the backup pin 50 can be set at a desired position on the base 31 by performing the placement work.

  On the other hand, when the positioning plate 40 is not used, the posture stabilizing member 60 is attached to the backup pin main body 51 for use. That is, as shown in FIG. 9, the backup pin 50 is mounted vertically on the base 31 with the posture stabilizing member 60 facing downward. As shown in FIG. 10, the mounted backup pin 50 is in a state where the lower end surface of the small-diameter portion 53 comes into contact with the base 31 and stands on the base 31, and further, on the base 31 by the magnetic force of the magnet 45. Fixed to. When the positioning plate 40 is not used, the side of the backup pin 50 is free, so that it is more likely to fall down. However, even if the backup pin 50 is tilted at some time, the posture stabilizing member 60 comes into contact with the base 31 (specifically, the outer peripheral edge of the bottom of the posture stabilizing member 60 comes into contact with the base 31). Since it acts so as to restrict the fall, it becomes easy to stabilize the backup pin 50 in an upright state without the positioning plate 40.

  If priority is given to fixing the backup pin 50 to the base 31, the magnet 45 should be brought into contact with the base 31. However, when the magnet 45 is brought into contact with the base 31, the height position of the tip of the pin depends on the position of the lower surface of the magnet, so that if the mounting position of the magnet 45 with respect to the backup pin main body 51 has an error, the printed circuit board P is supported. There is a problem that the position varies.

  In this regard, in this configuration, the entire magnet 45 is accommodated in the accommodating portion 44, and as shown in FIGS. 7 and 10, the magnet 45 is not in contact with the base 31 (non-contact structure). Therefore, the support position of the printed circuit board P is determined (depends on) only by the height of the backup pin main body 51. In general, since the pin processing accuracy is high and the “variation” of the pin height is small, the “variation” of the support position of the printed circuit board P can be reduced.

  Also, as shown in FIG. 10, the position of the lower surface of the posture stabilizing member 60 is set higher than the position of the lower surface of the small diameter portion 53 so that the posture stabilizing member 60 does not contact the base 31. The reason why such a configuration is adopted is that, as described above, the support position of the printed circuit board P is determined (dependent) only by the height of the backup pin main body 51, thereby “variation” of the support position of the printed circuit board P. This is to reduce the size.

  As shown in FIGS. 3, 6, and 11, the lifting device 70 includes a plurality of guide shafts 72, a housing 73 that supports the guide shaft 72, a ball screw 75, a bearing portion 76, and a motor 77. ing. The guide shaft 72 supports the support table 35 so as to be movable up and down, and fulfills the function of moving the support table 35 up and down horizontally.

  The ball screw 75 is supported by a bearing portion 76 so as to be able to advance and retreat in the vertical direction, and the upper end portion is connected to the center portion of the lower surface of the support table 35. A ball nut (not shown) provided in the bearing portion 76 is screwed into the ball screw 75, and constitutes a ball screw mechanism that converts a rotational movement around the axis into a linear movement along the axis. .

  The motor 77 is installed on the side portion of the bearing portion 76 (the right side portion in FIG. 11) with the motor shaft facing upward. The bearing portion 76 and the motor 77 are each provided with a pulley, and an endless belt 79 passes between the pulleys.

  From the above, when the motor 77 is driven, the rotational force is transmitted to the ball nut of the bearing portion 76 via the endless belt 79, and the ball screw 75 is moved up and down. As a result, the support table 35 is moved up and down integrally with the ball screw 75 to displace the base 31 between the lowered position (not shown) and the raised position (not shown).

  In a state where the base 31 is located at the lowered position, the backup pins 50 are separated from the substrate P by a predetermined distance below the printed circuit board P conveyed on the conveyor. On the other hand, when the base 31 is moved to the raised position, the backup pin 50 comes into contact with the lower surface of the board from below, and the printed board P stopped at the mounting work position is backed up.

3. Effects of this Embodiment According to this embodiment, the backup pin main body 51 can be commonly used when the positioning plate 40 is used and when it is not used. Therefore, it is possible to reduce the number of pins held by about half compared to the case of changing the type of backup pin used depending on the presence or absence of the positioning plate 40.

  Further, according to the present embodiment, the contact ring 65 is provided in the shaft hole 63 of the metal block 61. Therefore, the adhesiveness is high compared with the fitting of metals, and removal is easy. Moreover, even if it wears out, since only the contact ring 63 needs to be replaced, the cost merit is higher than when the metal block 61 is completely replaced.

  Further, according to the present embodiment, the backup pin 50 is fixed to the base 31 with a magnetic force, so that the backup pin 50 is unlikely to fall down and is not likely to be displaced.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the above embodiment, the “surface mounter 1” is exemplified as an example of the substrate processing apparatus on which the substrate support device 30 is mounted. However, the substrate processing apparatus is not limited to the surface mounter. In other words, any device that performs any processing on the printed circuit board P backed up by using the substrate support device 30 may be used. The present invention can also be applied to a dispenser for applying an agent. In the case of a printing apparatus, the squeegee and the drive unit that drives (moves) the squeegee are “execution units”. In the case of the dispenser, the head that discharges the coating liquid and the drive unit that drives (moves) the “execution unit”. Is.

  (2) In the above embodiment, the backup pin 50 has a straight shape. However, as shown in FIG. 12, for example, the support portion 55A at the tip of the backup pin main body 51 may be bent in an L shape. If the shape is bent in an L-shape, the effect of enabling backup of the range that protrudes from the base 31 can be obtained.

  (3) In the above embodiment, the posture stabilizing member 60 is made of metal. However, as shown in FIG. 13, the posture stabilizing member 60A may be made of synthetic resin and the contact ring may be eliminated. In this way, the cost can be reduced.

DESCRIPTION OF SYMBOLS 1 ... Surface mounter 30 ... Board support device 31 ... Base 40 ... Positioning plate 43 ... Positioning hole 45 ... Magnet 50 ... Backup pin 51 ... Backup pin main body 53 ... Small diameter part 60 ... Attitude stabilizing member 61 ... Metal block (corresponding to "metal body" of the present invention)
65 ... Contact ring 70 ... Elevating device 100 ... Executing work device (corresponding to "execution unit" of the present invention)

Claims (7)

A backup pin that is disposed on a base provided in a substrate support device and supports a printed circuit board,
A backup pin body in which a small diameter portion that fits into a positioning hole formed in a positioning plate that is detachably mounted on the base is formed on the lower end side, and a front end side is a support portion that supports the printed circuit board When,
The backup pin body is detachably attached to the small diameter portion of the backup pin body, and the backup pin body is erected with respect to the base when the backup pin body is disposed on the base without using the positioning plate. A backup pin with a posture stabilizing member that stabilizes the posture. The posture stabilizing member is
A metal body formed by penetrating a shaft hole into which the small diameter portion is fitted in the center portion;
The backup pin according to claim 1, further comprising: a contact ring made of an elastic material attached to the inner peripheral surface of the shaft hole and in close contact with the small diameter portion.   The backup pin according to claim 1, wherein a magnet is attached to a housing portion formed on a lower end surface of the backup pin main body.   The backup pin according to claim 3, wherein only the lower end surface of the backup pin main body is in contact with the base, and the magnet is not in contact. The backup pin according to any one of claims 1 to 4,
A base for attaching the backup pin;
A substrate support device comprising: a lifting device that lifts and lowers the base.   The substrate support apparatus according to claim 5, further comprising a positioning plate that is detachably attached to the upper surface of the base and forms a positioning hole for positioning the backup pin. The substrate support apparatus according to claim 5 or 6,
A substrate processing apparatus comprising: an execution unit that executes a predetermined process on the printed circuit board supported by the substrate support apparatus.

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