JP5142921B2 - Board transfer device for component mounting equipment - Google Patents

Description

  The present invention relates to a board transfer device for a component mounting apparatus, and more specifically, it is possible to reliably detect a board on a board transfer path even if the width in the direction orthogonal to the transfer direction of the board being transferred is changed. The present invention also relates to a substrate transfer device for a component mounting apparatus.

  Conventionally, a sensor is used to detect a board on a board transfer path in a board transfer apparatus of a component mounting apparatus. Sensors commonly used to detect a substrate are a reflective sensor and a transmissive sensor.

  In the substrate detection apparatus 100 shown in FIG. 4 (FIG. 1 of Patent Document 1), a transmissive sensor (light emitting unit 102A, light receiving unit 102B) is used as the substrate detection sensor 102. In this case, the conveyance belt 104 is provided. A transmissive sensor (light emitting unit 102A, light receiving unit 102B) is disposed on each of the pair of opposing guide rails 106. Specifically, the light emitting unit 102A and the light receiving unit 102B are disposed on each of the pair of guide rails 106 so as to face each other in a direction orthogonal to the substrate transport direction and in a direction inclined obliquely with respect to the horizontal direction. . Then, it is detected that the optical axis L of the sensor light emitted from the light emitting unit 102A to the light receiving unit 102B is blocked by the substrate 1 on the substrate conveyance path (the substrate 1 supported on the conveyance belt 104 on both sides), The substrate 1 on the substrate transport path is detected.

  Further, in order to cope with various substrate sizes, the distance between a pair of opposing guide rails provided with a transport belt (hereinafter, may be referred to as a substrate transport width) can be changed. There is a transport device. In such a substrate transport apparatus, generally, one guide rail is fixed, and the other guide rail is movable in a horizontal direction orthogonal to the substrate transport direction.

  However, in a substrate transport apparatus using a transmissive sensor as a substrate detection sensor, if the movable guide rail is moved in the horizontal direction perpendicular to the substrate transport direction and the substrate transport width is changed, the light emitting unit and the light receiving portion of the transmissive sensor are received. The inclination of the line connecting the parts and the distance between the light emitting part and the light receiving part are changed. For this reason, it has been necessary to adjust the sensitivity and the like of the substrate detection sensor each time the substrate transport width is changed.

  On the other hand, in Patent Document 2, as shown in FIG. 5 (FIG. 4 of Patent Document 2), sensor light emitted from the light emitting unit 102A of the transmission sensor to the light receiving unit 102B is attenuated by using the optical filter 112. Thus, there is described a substrate transfer device 110 that does not require adjustment of sensitivity of the substrate detection sensor even when the substrate transfer width is changed.

  Further, in Patent Document 3, as shown in FIG. 6 (FIG. 4 of Patent Document 3), a transmissive substrate detection sensor (light emitting unit 102A, light receiving unit) is disposed so that the substrate 1 is sandwiched between the lower part and the upper part of the substrate transport path. 102B) prevents the substrate detection sensors (light emitting unit 102A, light receiving unit 102B) from moving even if the substrate conveyance width is changed, and makes it unnecessary to adjust the sensitivity of the substrate detection sensor. An apparatus 120 is described.

  Patent Document 4 describes an entrance / exit management gate device provided with a light passage hole, and Patent Document 5 describes a laser marking device holder provided with a light passage hole. Conventionally, it has not been considered to provide a hole for light passage in a board conveying device of a component mounting apparatus.

Japanese Patent Laid-Open No. 6-211334 (FIG. 1) JP 2007-258386 A (FIG. 4) Japanese Patent Laying-Open No. 2007-184309 (FIG. 4) JP 2005-108189 A Utility Model Registration No. 3074142

  When the substrate transfer apparatus 110 described in Patent Document 2 is used, the state of attenuation of the sensor light changes depending on the assembly state of the optical filter 112. For this reason, when assembling the optical filter 112, a lot of time is required for adjustment.

  Further, in the substrate transfer device 110 described in Patent Document 2, if the substrate transfer width is changed, the positional relationship of the substrate detection sensor 102 (light emitting unit 102A, light receiving unit 102B) changes, so that the substrate transfer width is wide, for example. If the substrate detection sensor 102 (light emitting unit 102A, light receiving unit 102B) is adjusted, it becomes difficult to detect the substrate 1 when the substrate transport width is narrowed, and the substrate detection sensor 102 (light emitting unit 102A, When the light receiving unit 102B) is adjusted, it becomes difficult to detect the substrate 1 when the substrate conveyance width is widened, and it is difficult to stably detect the substrate.

  Further, when the substrate transfer device 120 described in Patent Document 3 is used, even if the substrate transfer width is changed, the positional relationship of the substrate detection sensors (the light emitting unit 102A and the light receiving unit 102B) does not change, but the substrate transfer path It is necessary to dispose transmissive substrate detection sensors (light emitting unit 102A and light receiving unit 102B) so that the substrate 1 is sandwiched between the lower part and the upper part. For this reason, even when a backup device is required to hold the substrate during mounting, the substrate detection sensor (the light emitting unit 102A in FIG. 6) is in the way, making it difficult to arrange the backup device. It may become.

  Further, in the substrate transfer device 120 described in Patent Document 3, since the substrate detection sensor (the light receiving unit 102B in FIG. 6) is positioned above the substrate, when the size of the substrate 1 is small, the substrate detection sensor (in FIG. 6). The light receiving unit 102B) and the component mounting head 122 are likely to interfere with each other. For this reason, the minimum size of the substrate 1 that can be applied depends on the size of the substrate detection sensor (the light receiving unit 102B in FIG. 6). In addition, it is difficult to mount components on the substrate 1 immediately below the position where the substrate detection sensor (the light receiving unit 102B in FIG. 6) is disposed.

  The present invention has been made in view of such problems, and does not require the use of an optical filter, and does not require readjustment of the substrate detection sensor even if the substrate transport width is changed, and is transported. It is another object of the present invention to provide a substrate carrying device for a component mounting apparatus, which can detect the noise stably and further does not need to place board detection sensors on the upper and lower parts of the board being conveyed.

  A substrate transport device of a component mounting apparatus according to the present invention that solves the above-described problems is a transmission substrate detection sensor having a light emitting unit and a light receiving unit, and an endless transport belt that transports a substrate, which are rotatably held opposite to each other. Component mounting, wherein one of the pair of guide rails is a fixed guide rail that is fixed, and the other is a movable guide rail that is movable in a horizontal direction perpendicular to the board conveying direction. In the substrate transport apparatus of the apparatus, one of the light emitting unit and the light receiving unit is attached to the fixed guide rail and fixed, or the outer side of the fixed guide rail opposite to the side on which the movable guide rail is located The other is fixed to the outside of the movable guide rail, which is opposite to the side where the fixed guide rail is located, independently from the movable guide rail. The movable guide rail is provided with a slit through which an optical axis of sensor light emitted from the light emitting unit toward the light receiving unit passes, and the movable guide rail is in a horizontal direction orthogonal to the substrate transport direction. The optical axis passes through the slit even if it moves by a predetermined amount.

  According to the board conveying device of the component mounting apparatus according to the present invention, one of the light emitting unit and the light receiving unit is attached and fixed to the fixed guide rail, or is the side opposite to the side on which the movable guide rail is located. The other side is fixed to the outside of the fixed guide rail, and the other side is fixed to the outer side of the movable guide rail opposite to the side where the fixed guide rail is located. Even when moved in the horizontal direction perpendicular to the substrate transport direction, the positions of the light emitting part and the light receiving part of the substrate detection sensor do not move, the optical axis of the sensor light emitted from the light emitting part to the light receiving part is constant, and light emission The distance between the light receiving portion and the light receiving portion is not changed.

  For this reason, even when the substrate conveyance width is changed, readjustment of the light emitting unit and the light receiving unit of the substrate detection sensor is unnecessary, and the substrate to be conveyed can be detected stably.

  In addition, since the optical axis of the sensor light emitted from the light emitting unit to the light receiving unit is constant, the substrate detection sensor can be adjusted regardless of the substrate transport width, and initial adjustment of the substrate detection sensor is easy. is there.

  In addition, since it is not necessary to place board detection sensors on the upper and lower parts of the board being transferred, it can also be used to transfer boards that require a backup device when mounting components. There is no interference with the head, and the position and size of the substrate detection sensor do not affect the mounting of components on the substrate.

  Further, even if an optical filter is not used, it is not necessary to readjust the substrate detection sensor when the substrate conveyance width is changed, and the cost is significantly reduced as compared with the substrate conveyance device 110 described in Patent Document 2 using the optical filter. be able to.

  In addition, since the substrate detection sensor is not provided on the movable guide rail, it is not necessary to provide wiring around the movable part (movable guide rail) necessary to provide the substrate detection sensor, and the assembly of the substrate detection sensor is easy. In addition, the quality of the product (component mounting board) is improved without causing problems due to wear of the wiring of the board detection sensor.

  Hereinafter, a substrate transfer apparatus 10 according to an embodiment of the present invention will be described in detail with reference to the drawings.

  1 is a plan view schematically showing a substrate transfer apparatus 10 according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. It is arrow III-III sectional view taken on the line. For convenience of illustration, the stopper 22 is not drawn in FIG.

  The substrate transfer device 10 according to the present embodiment includes a bottom plate 11, a movable guide rail 12, a fixed guide rail 14, an endless transfer belt 16, a pulley 18, a substrate detection sensor 20, and a stopper 22. Do it.

  The movable guide rail 12 and the fixed guide rail 14 are a pair of plate-like members located on both sides of the upper surface of the bottom plate 11 and opposed to each other, and rotatably support the endless transport belt 16 via a pulley 18. It has a role of defining the substrate transfer width, and forms the outer shape of the substrate transfer device 10 together with the bottom plate 11. Pulleys 18 are attached to the upper portions near both ends of the opposing surfaces of the movable guide rail 12 and the fixed guide rail 14 so as to be rotatable about a horizontal axis. In both of the fixed guide rails 14, the pulleys 18 are arranged horizontally with the pulleys 18 at both ends. Then, when the driving force is supplied from a driving mechanism (not shown) and the pulley 18 rotates, the conveying belt 16 rotates. The substrate 1 is supported on both sides by a conveyor belt 16 from below, and is conveyed in the traveling direction of the upper conveyor belt 16.

  The fixed guide rail 14 is fixed in position and cannot move, but the movable guide rail 12 is movable in the horizontal direction perpendicular to the board conveying direction, and is fixed according to the width of the board 1 on which the component is mounted. The distance from the guide rail 14 (substrate transport width) can be changed.

  The stopper 22 abuts on the substrate 1 being conveyed and stops the substrate 1 to perform positioning.

  The substrate detection sensor 20 is a transmissive sensor, and includes a light emitting unit 20A and a light receiving unit 20B. The light emitting unit 20A and the light receiving unit 20B are inclined in the direction perpendicular to the substrate transport direction and in the horizontal direction. It arrange | positions so that it may oppose in the inclined direction.

  The light emitting unit 20A is attached to the upper end of the fixed guide rail 14. The light receiving unit 20B is supported by a support member 11A disposed on the upper surface of the bottom plate 11, and is independent of the movable guide rail 12 on the outer side of the movable guide rail 12 on the side opposite to the side on which the fixed guide rail 14 is located. Are fixed and arranged. For this reason, even if the movable guide rail 12 moves, the light-receiving part 20B does not move.

  On the other hand, since the light receiving unit 20B is disposed outside the movable guide rail 12, the sensor light emitted from the light emitting unit 20A to the light receiving unit 20B is blocked by the movable guide rail 12 as it is.

  Therefore, in the substrate transport apparatus 10 according to the present embodiment, the movable guide rail 12 is provided with the vertically long slit 12A, and the optical axis L of the sensor light emitted from the light emitting unit 20A to the light receiving unit 20B passes through the slit 12A. I am doing so.

  Since the slit 12A has a predetermined length in the vertical direction, even if the movable guide rail 12 moves in the horizontal direction orthogonal to the substrate transport direction, if the movement is within a predetermined distance, the optical axis L is It passes through the slit 12A and is not blocked by the movable guide rail 12. In FIG. 3, when the movable guide rail 12 is positioned at a position A where the optical axis L grabs the lower end of the slit 12A, as shown by a solid line, the substrate transport width becomes maximum, and as shown by a two-dot chain line, When the movable guide rail 12 is positioned at a position B where the optical axis L grabs the upper end of the slit 12A, the substrate transport width is minimized.

  Next, a substrate transfer operation in the substrate transfer apparatus 10 according to the present embodiment will be described.

  The substrate 1 transported to the substrate transport apparatus 10 from the previous process is transported in the traveling direction of the upper transport belt 16 while being supported from below by the transport belt 16.

  When the substrate detection sensor 20 detects the substrate 1, the traveling speed of the transport belt 16 is reduced and the traveling speed of the substrate 1 is decreased, and the substrate 1 comes into contact with the stopper 22 and stops. The stopped substrate 1 is clamped in the substrate transport apparatus 10 and components are mounted on the substrate 1 by a component mounting head of a component mounting apparatus (not shown).

  After the completion of the component mounting, the substrate 1 is conveyed in the traveling direction of the upper conveyance belt 16 while being supported on both sides by the conveyance belt 16 from below, and is conveyed to the next process.

  Next, a new substrate 1 is transferred to the substrate transfer device 10 from the previous process.

  When the width of the new substrate 1 is different from the width of the substrate 1 transported last time, it is necessary to adjust the substrate transport width by moving the movable guide rail 12 in the horizontal direction orthogonal to the substrate transport direction. In the substrate transport apparatus 10 according to the above, even if the movable guide rail 12 is moved in the horizontal direction orthogonal to the substrate transport direction, the position of the substrate detection sensor 20 (light emitting unit 20A, light receiving unit 20B) does not move, and the light emitting unit The optical axis L of the sensor light irradiated from 20A to the light receiving unit 20B is constant, and the distance between the light emitting unit 20A and the light receiving unit 20B does not change.

  For this reason, in the substrate transport apparatus 10 according to the present embodiment, even if the substrate transport width is changed, readjustment of the substrate detection sensor 20 (light emitting unit 20A, light receiving unit 20B) is unnecessary and the substrate transport device 10 is transported. The incoming substrate 1 can be detected stably.

  In addition, since the optical axis L of the sensor light irradiated from the light emitting unit 20A to the light receiving unit 20B is constant, the substrate detection sensor 20 can be adjusted regardless of the substrate transport width, and the initial state of the substrate detection sensor 20 can be adjusted. The adjustment is easy.

  Further, in the board transfer device 10 according to the present embodiment, it is not necessary to arrange the board detection sensors 20 on the upper and lower parts of the board 1 being transferred, so that the board 1 that needs to be backed up when mounting components is transferred. In addition, the substrate transport device 10 according to the present embodiment can be used, and the substrate detection sensor 20 does not interfere with the component mounting head, and the position and size of the substrate detection sensor 20 are used for component mounting on the substrate 1. Will not be affected.

  Further, even if the optical filter 112 is not used, it is not necessary to readjust the substrate detection sensor 20 when changing the substrate conveyance width, and the cost is significantly higher than the substrate conveyance device 110 described in Patent Document 2 using the optical filter 112. Can be reduced.

  In addition, since the substrate detection sensor 20 is not provided on the movable guide rail 12, it is not necessary to provide wiring around the movable portion (movable guide rail 12) necessary for providing the substrate detection sensor 20, and the substrate detection sensor 20. Can be easily assembled, and there is no inconvenience due to wear or the like of the wiring of the board detection sensor 20, so that the quality of the product (component mounting board) is improved.

  The shape of the slit 12A of the movable guide rail 12 of the substrate transport apparatus 10 according to the present embodiment is not particularly limited, and the shape is not limited as long as it has a predetermined length or more in the vertical direction. It is not limited to a rectangle elongated in the direction. For example, it may be an elliptical elongated hole that is vertically elongated, a square or a circle, or a rectangle that is longer in the horizontal direction than in the vertical direction.

  In addition, the slit 12A may not be an air gap as long as sensor light emitted from the light emitting unit 20A of the substrate detection sensor 20 toward the light receiving unit 20B can be transmitted. For example, transparent glass or plastic is used. The slit 12A may be formed by embedding. However, in this case, it is necessary to determine the arrangement of the substrate detection sensor 20 in consideration of the refractive index of the glass or plastic used.

  In the substrate transfer apparatus 10 according to the present embodiment, the light emitting unit 20A is fixed to the fixed guide rail 14 and the light receiving unit 20B is fixed to the outside of the movable guide rail 12 by the support member 11A. You may replace arrangement | positioning with 20A and the light-receiving part 20B.

  In addition, the light emitting unit 20A or the light receiving unit 20B may not be fixed to the fixed guide rail 14, but may be fixed to a frame or the like outside the fixed guide rail 14 on the side opposite to the side where the movable guide rail 12 is located. . In this case, when the height position of the light emitting unit 20A or the light receiving unit 20B fixed to the outside of the fixed guide rail 14 is low and the optical axis L of the sensor light is blocked by the fixed guide rail 14, the optical axis L passes. Thus, it is necessary to provide a slit in the fixed guide rail 14 as well.

The top view which shows typically the board | substrate conveyance apparatus which concerns on embodiment of this invention 1 is a cross-sectional view taken along the line II-II in FIG. 1 is a cross-sectional view taken along line III-III in FIG. The figure which shows typically the conventional board | substrate detection apparatus (using a transmissive sensor) of patent document 1 Side view showing the main configuration of the substrate transfer apparatus described in Patent Document 2 Side view showing a main configuration of the substrate transfer apparatus described in Patent Document 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Board | substrate 10 ... Board | substrate conveyance apparatus 11 ... Bottom plate 11A ... Support member 12 ... Movable guide rail 12A ... Slit 14 ... Fixed guide rail 16 ... Conveyance belt 18 ... Pulley 20 ... Board | substrate detection sensor 20A ... Light-emitting part 20B ... Light-receiving part 20C ... Sensor light 22 ... Stopper L ... Optical axis

Claims (1)

A transmission type substrate detection sensor having a light emitting portion and a light receiving portion; and a pair of guide rails arranged opposite to each other to rotatably hold an endless conveyance belt for conveying the substrate, and one of the pair of guide rails Is a fixed guide rail that is fixed, and the other is a movable guide rail that is movable in a horizontal direction orthogonal to the board conveyance direction.
One of the light emitting part and the light receiving part is fixedly attached to the fixed guide rail, or is fixed to the outside of the fixed guide rail opposite to the side where the movable guide rail is located, and the other is Fixed to the outside of the movable guide rail opposite to the side on which the fixed guide rail is located, independently from the movable guide rail;
Further, the movable guide rail is provided with a slit through which an optical axis of sensor light emitted from the light emitting unit toward the light receiving unit passes.
The substrate transport apparatus of a component mounting apparatus, wherein the optical axis passes through the slit even when the movable guide rail moves in a horizontal direction orthogonal to the substrate transport direction.

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