JP4933461B2 - Substrate transfer device - Google Patents

Description

  The present invention relates to a substrate transport apparatus that transports a printed circuit board on which a predetermined operation is performed and detects the presence or absence of the printed circuit board.

For example, Patent Document 1 discloses a substrate transport apparatus that transports a printed circuit board on which a predetermined operation is performed. In such a substrate transport apparatus, after the presence of the printed circuit board is confirmed, a predetermined operation, for example, an operation of mounting an electronic component on the printed circuit board is performed.
JP-A-7-106800

  However, when a reflective photoelectric sensor is used to irradiate light from below the printed circuit board and receive light reflected by the printed circuit board, it is detected that the printed circuit board is present. Sometimes, false detections were made due to the presence of material and notches. In addition, even if there is no printed circuit board, the light reflected by the electronic components and mounting head held by the suction nozzle standing above the circuit board transport device is received and erroneously detected that there is a printed circuit board. was there. In addition, a transmission type photoelectric sensor is used, for example, to irradiate light from the diagonally upper side of the printed circuit board toward the printed circuit board and receive this light diagonally below the printed circuit board, so that there is no printed circuit board. For example, when a printed board has a cutout or a hole, it may be erroneously detected that there is no printed board.

  Therefore, the present invention can surely confirm the presence or absence of a printed circuit board regardless of the color of the printed circuit board, the type of material, etc., and even if there is a notch or a hole. It is an object of the present invention to provide a substrate transfer device that can confirm the presence or absence of the substrate.

For this reason, the first invention is a substrate transport apparatus for transporting a printed circuit board on which a predetermined operation is performed and detecting the presence or absence of the printed circuit board, at an upper level and a lower level where the printed circuit board is located. An upper light emitting part and a lower light emitting part, each of which has a light emission width in the vertical direction longer than the thickness of the printed circuit board and emits light horizontally toward the printed circuit board, and the upper light emitting part sandwiching the printed circuit board And an upper light receiving portion disposed so as to face the lower light emitting portion and having a light receiving width in a vertical direction longer than a thickness of the printed circuit board and receiving light emitted from the upper light emitting portion and the lower light emitting portion, and A lower light receiving portion is provided.

A second invention is a substrate transport apparatus for transporting a printed circuit board on which a predetermined operation is performed and detecting the presence or absence of the printed circuit board, wherein the upper level where the predetermined operation is performed on the printed circuit board and An upper light-emitting portion and a lower light-emitting portion that are provided at a lower level that conveys the printed circuit board and have a light emission width in the vertical direction that is longer than the thickness of the printed circuit board, and that emit light in the horizontal direction toward the printed circuit board; light the upper light emitting portion and the upper light emitting unit wherein is disposed so as to face the lower light emitting unit having a light receiving width of the long vertical direction than the thickness of the printed circuit board and the lower light emitting unit emits across the An upper light receiving portion and a lower light receiving portion for receiving light are provided.

  A third invention is a substrate transport apparatus for transporting a printed circuit board on which a predetermined operation is performed and detecting the presence or absence of the printed circuit board, and having a light emission width in the vertical direction longer than the thickness of the printed circuit board. A light emitting device that emits light in a horizontal direction toward the printed circuit board, and a light receiving width in a vertical direction that is longer than the thickness of the printed circuit board and is disposed so as to face the light emitting device with the printed circuit board interposed therebetween. A light-receiving device that receives light emitted from the light-emitting device, the light-emitting device having a light-emitting side shielding member at a central portion, and the light-receiving device facing the light-emitting side shielding member. It is characterized by having.

  According to a fourth aspect of the present invention, there is provided a substrate transport apparatus for transporting a printed circuit board on which a predetermined operation is performed and detecting the presence or absence of the printed circuit board, wherein the printed circuit board is positioned in the height direction. A light emitting device that emits light in a horizontal direction toward the printed circuit board having a light emission width in the vertical direction longer than an amount of movement for moving the printed circuit board between the upper level and the lower level in the vertical direction; and A light receiving device that is disposed so as to face the light emitting device and has a light receiving width in a vertical direction longer than the moving amount and that receives light emitted from the light emitting device. A shielding member is provided between the upper level and the lower level, and the light receiving device has a light receiving side shielding member facing the light emitting side shielding member.

  According to a fifth aspect of the present invention, there is provided a substrate transport apparatus configured to transport a printed circuit board on which a predetermined operation is performed and detect the presence or absence of the printed circuit board, wherein the printed circuit board is positioned in the height direction. The printed circuit board has a light emission width in the vertical direction that is longer than the amount of movement that moves the printed circuit board in the vertical direction between an upper level that performs a predetermined operation on the printed circuit board and a lower level that transports the printed circuit board. A light emitting device that emits light in a horizontal direction toward the light source, and light emitted by the light emitting device that is disposed so as to face the light emitting device across the printed board and has a light receiving width in the vertical direction that is longer than the moving amount A light receiving device that has a light emitting side shielding member between the upper level and the lower level, and the light receiving device faces the light emitting side shielding member and receives the light receiving side shielding member. Characterized in that had member.

  The present invention can reliably check the presence or absence of a printed circuit board regardless of the color of the printed circuit board, the type of material, etc., and even if there is a notch or a hole. It is possible to provide a substrate transfer apparatus that can reliably check the presence or absence.

  In the following, an embodiment of a substrate transfer device in an electronic component mounting apparatus for mounting chip-shaped electronic components on a printed circuit board as a printed circuit board assembly apparatus will be described in detail. In FIG. 1 to FIG. 6, reference numeral 1 denotes a printed circuit board transport device, which inherits and supports a printed circuit board 2 on which a minute chip-shaped electronic component (hereinafter referred to as “chip component” or “component”) is mounted.

  Since a plurality of component supply units for supplying chip components are mounted on the supply table, the mounting head having a plurality of suction nozzles moves onto the desired component supply unit, and the chip components are transferred from the component supply unit. Is adsorbed and taken out, and is mounted on the printed circuit board 2 supported by the substrate transfer device 1.

  Reference numerals 3 and 4 denote a pair of conveyance chutes that can be moved from each other by each drive source and convey and guide the printed circuit board 2. Each conveyance chute 3 and 4 has a conveyance belt 5 on which the printed circuit board 2 is placed and conveyed. In this embodiment, for example, both the conveying belts 5 or a clamping mechanism (not shown) is raised with respect to the pair of conveying chutes 3 and 4, and the printed circuit board 2 is pressed against the position restricting portion 6 from below, thereby In this configuration, the height of the printed circuit board 2 may be determined by lowering the pair of conveyance chutes 3 and 4 with respect to both the conveyance belts 5.

  Alternatively, a backup base (not shown) in which a plurality of backup pins are inserted may be raised to support the printed circuit board 2 horizontally from the lower surface.

  A supply conveyor (not shown) is provided on the upstream side of the conveyance shunts 3 and 4, and a discharge conveyor (not shown) is provided on the downstream side to convey the printed circuit board 2 on the supply conveyor. The printed circuit boards 2 on the transport chutes 3 and 4 can be transferred onto the discharge conveyors on the shunts 3 and 4.

  8 is a light emitting device that emits light in the horizontal direction toward the printed circuit board 2, and this light emitting device 8 has a width wider than that of the thickest printed circuit board 2 to be processed, and the height direction of the printed circuit board 2. Has a light emitting portion 81 having a light emission width LS in the vertical direction that is longer than the up-and-down movement amount for moving the printed circuit board 2 in the vertical direction. The light emitting portion 81 is provided with a plurality of light emitting ends 82 of light fan bars, which will be described later, with a predetermined interval in the vertical direction. In addition, a shielding plate 83 is provided approximately in the center of the light emitting portion 81 so as to be positioned in front of each light emitting end 82 in the central portion so as to shield light from each light emitting end 82.

  Reference numeral 9 denotes a light receiving device that receives light emitted from the light emitting device 8 and is disposed so as to face the light emitting device 8 with the printed circuit board 2 supported by the pair of conveyance chutes 3 and 4 interposed therebetween. . The light receiving device 9 has a light receiving portion 91 having a light receiving width in the vertical direction that is longer than the amount of vertical movement. The light receiving portion 91 is provided with a plurality of light receiving ends 92 of optical fan bars, which will be described later, with a predetermined interval in the vertical direction. In addition, a shielding plate 93 is provided approximately in the center of the light receiving portion 91 so as to be positioned in front of the light receiving end 92 in the center portion and shield light from each light receiving end 82.

  Further, as shown in FIG. 1, a cutout portion 3A is formed with a part of the transport chute 3 directed from the inside to the outside, and the light emitting device 8 is disposed behind the cutout portion 3A. Further, a cutout portion 4A is formed with a part of the transport chute 4 directed from the inside to the outside, and the light receiving device 9 is disposed at the back of the cutout portion 4A.

  The upper light emitting portion 84 above the shielding plate 83 and the lower light emitting portion 85 below the light emitting device 8 each have a light emission width in the vertical direction that is longer than the thickness dimension of the substrate. Each light emitting end 82 is provided with one end of the optical fiber 10 (see FIG. 2), and one end thereof is provided so as to face the light receiving device 9, and the other end is supplied with a power supply voltage from the power supply circuit 16. It is disposed so as to face the light emitting element 12 that is amplified and supplied by the amplifier 11.

  Similar to the light emitting device 8, the upper light receiving portion 94 above the shielding plate 93 and the lower light receiving portion 95 below the light receiving device 9 each have a light receiving width in the vertical direction that is longer than the thickness dimension of the substrate. Yes. In addition, each light receiving end 92 is provided with one end of the optical fiber 13 and one end thereof is provided so as to face the light emitting device 8, and the other end faces the light receiving element 14 built in the amplifier 11. Is arranged. In addition, you may arrange | position a light emitting element and a light receiving element directly in a light-emitting device and a light-receiving device, without using an optical fiber.

  Reference numeral 15 denotes a microcomputer which controls light emission and light reception related to the light emitting device 8 and the light receiving device 9. For example, assuming that the received light amount of each of the upper light receiving unit 94 and the lower lower light receiving unit 95 when the printed circuit board 2 is not present is 100%, the received light amount when the thinnest printed circuit board 2 to be processed is present is, for example, 94. If the received light amount is 94% or less, the microcomputer 15 determines that “the printed circuit board 2 is present”.

  As described above, when the light receiving amount equal to or smaller than the light receiving amount when the thinnest printed circuit board 2 to be processed by each of the upper light receiving unit 94 and the lower lower light receiving unit 95 is received, The microcomputer 15 may determine, but for each type of the printed circuit board 2 having a different thickness, the received light amount for determining that “the printed circuit board 2 is present” is set and stored in the storage unit. When the received light amount is smaller, the processing may be performed so as to determine that “the printed circuit board 2 is present”.

  With the above configuration, the operation will be described below. First, when the printed circuit board 2 is inherited from an upstream device (not shown) and exists on the supply conveyor, the printed circuit board 2 on the supply conveyor is printed on the conveyance chutes 3 and 4 and on the conveyance chutes 3 and 4. The substrate 2 is conveyed to the discharge conveyor.

  When the printed circuit board 2 reaches a predetermined position on the conveyance chutes 3 and 4, conveyance by the conveyance belt 5 is stopped, and the microcomputer 15 amplifies the power supply voltage from the power supply circuit 16 by the amplifier 11 and supplies it to the light emitting element 12. To emit light. Then, light having a light emission width LS is emitted from the lower light emitting unit 85 through the optical fiber 10 in the horizontal direction, that is, toward the lower light receiving unit 95 facing the printed circuit board 2.

  In this case, if the amount of light received by the lower light receiving unit 95 is 94% or less due to the presence of the printed circuit board 2, the microcomputer 15 determines that “the printed circuit board 2 is present”.

  Thus, when determining the presence of the printed circuit board 2, the vertical dimension of the lower light emitting unit 85 and the lower light receiving unit 95 is significantly smaller than the vertical dimension of the light emitting unit 81 and the light receiving unit 91, and the print Since the thickness of the substrate 2 is closer than the vertical dimension of the light emitting unit 81 and the light receiving unit 91, the reduction rate of the amount of light received when the printed circuit board 2 is not present between the lower light emitting unit 85 and the lower light receiving unit 95 Is larger than a configuration in which light is emitted from the entire light emitting unit 81 and received by the entire light receiving unit 91.

  As a result, the presence / absence determination of the printed circuit board 2 can be made accurate, and particularly when the presence / absence of the thin printed circuit board 2 is determined, the rate of decrease in the amount of light received when the printed circuit board 2 is present increases. In addition, the presence or absence of the printed circuit board 2 can be determined.

  As described above, when the microcomputer 15 determines that “the printed circuit board 2 is present”, after confirming the presence of the printed circuit board 2, the lifting / lowering device (not shown) moves the conveyor belt 5 as shown in FIG. 5. The printed board 2 is pushed up from below to press the printed board 2 against the position restricting portions 6 of the pair of conveyance chutes 3 and 4 to position the printed board 2 in the height direction.

  In this positioned state, the microcomputer 15 again emits light toward the light receiving device 9 facing the light emitting element 12, emits light from the upper light emitting unit 84 to the upper light receiving unit 94, and due to the presence of the printed circuit board 2, the upper light receiving unit 94. Is less than the preset 94%, it is determined that “the printed circuit board 2 is present”.

  When determining the presence or absence of the printed circuit board 2 in the positioned state, as described above, as in the case of emitting light of the emission width LS from the lower light emitting unit 85 in the horizontal direction toward the lower light receiving unit 95 facing each other, The vertical dimension of the upper light-emitting part 84 and the upper light-receiving part 94 is significantly smaller than the vertical dimension of the light-emitting part 81 and the light-receiving part 91, and the thickness of the light-emitting part 81 and the light-receiving part 91 depends on the thickness of the printed circuit board 2. Since it is closer than the vertical dimension, the rate of decrease in the amount of light received when the printed circuit board 2 does not exist between the upper light emitting unit 84 and the upper light receiving unit 94 is emitted from the entire light emitting unit 81, and the entire light receiving unit 91. It becomes larger compared with the configuration that receives light at. As a result, the presence / absence determination of the printed circuit board 2 can be made accurate, and particularly when the presence / absence of the thin printed circuit board 2 is determined, the rate of decrease in the amount of light received when the printed circuit board 2 is present increases. In addition, the presence or absence of the printed circuit board 2 can be determined.

  Further, the presence or absence of the printed circuit board 2 can be surely confirmed regardless of the color of the printed circuit board 2 and the type of material, and even if there is a notch or an opening 2A. In addition, since the light emitting device 8 and the light receiving device 9 have a light emitting width and a light receiving width in the vertical direction that are longer than the moving amount of the printed board 2, the light emitting device 8 and the light receiving device 9 can be reliably used even when the printed board 2 is lowered and raised. In addition, the presence or absence of the printed circuit board 2 can be confirmed.

  Then, after detecting “the printed circuit board 2 is present”, the suction nozzle (not shown) that sucks and holds the electronic component is moved in the horizontal direction and moved above the component mounting position of the printed circuit board 2 to be lowered. Then, minute chip parts are sequentially mounted on the printed circuit board 2.

  When all the chip components have been mounted on the printed circuit board 2, the conveyor belt 5 or the clamp mechanism is lowered, and the printed circuit board 2 on the transport chutes 3 and 4 is transferred to the discharge conveyor and the printed circuit board 2 on the supply conveyor. Is conveyed to the conveyance chutes 3 and 4.

  When it is determined that “the printed circuit board 2 is absent” when the presence or absence of the printed circuit board 2 is detected before or after the conveyance belts 5 are raised (see FIG. 7), the notifying means (not shown) The microcomputer 15 controls the microcomputer 15 to stop the operation of the electronic component mounting apparatus while notifying the operator of that fact or auditorily.

  Further, when the model of the printed circuit board 2 is changed and the width is changed, the width between the transport chutes 3 and 4 is changed, and the width (interval) between the light emitting device 8 and the light receiving device 9 is changed, that is, the chute width. The light emission amount of the light-emitting device 8 is increased according to the width when the width of the light-emitting device increases, the light reception amount without the substrate at that time is set to 100%, and the light emission amount is decreased according to the width when the chute width is reduced. By setting the amount of light received when there is no substrate at that time to 100%, the presence or absence of the printed board 2 is surely confirmed even when the width of the printed board 2 changes.

  Furthermore, the use of the light emitting device 8 and the light receiving device 9 is not limited to detecting the presence or absence of the printed circuit board 2, and the deceleration of the printed circuit board 2 that has been conveyed so as to detect the passage of the printed circuit board 2 is detected. Or you may use for control of a stop. That is, for example, when it is detected that the pair of transport chutes 3 and 4 has inherited the printed circuit board 2 from the upstream supply conveyor and the moving printed circuit board 2 has reached a predetermined position of the pair of transport chutes 3 and 4, You may make it control both the conveyance belts 5 so that the printed circuit board 2 may be stopped in the position away from the position by the predetermined distance.

  Instead of the light emitting device 8 and the light receiving device 9, a line sensor may be used.

  Further, in the above-described embodiment, the shielding plate 83 and the shielding plate 93 are provided at substantially the center of the light emitting unit 81 and the light receiving unit 91, and the upper light receiving unit 94 and the lower light emitting unit 85 are divided into the upper light emitting unit 84 and the lower light emitting unit 85. Although divided into the light receiving unit 95, as shown in FIGS. 8 to 10, an upper light emitting unit 61 and a lower light emitting unit 62 each having a plurality of light emitting ends 82 are provided on the upper and lower portions of the light emitting device 60, respectively. The upper light receiving part 71 and the lower light receiving part 72 having a plurality of light receiving ends 92 may be provided on the upper and lower parts of the light receiving device 70, respectively. The vertical substrate detection width by the upper light emitting unit 61 and the upper light receiving unit 71 is made larger than the thickness of the printed circuit board, and the vertical substrate detection width by the lower light emitting unit 62 and the lower light receiving unit 72 is set to the printed circuit board. Larger than the thickness.

  In this way, by configuring the light emitting device 60 and the light receiving device 70, a change in the amount of light received by the upper light receiving unit 94 from the upper light receiving unit 94 and a light reception by the lower light receiving unit 72 of light from the lower light emitting unit 62. Based on the change in the amount, the presence or absence of the printed circuit board can be accurately detected as in the above-described embodiment.

  Compared with the configuration in which the shielding plate 83 and the shielding plate 93 are provided at substantially the center of the light emitting unit 81 and the light receiving unit 91, the light from the light emitting element as a light source is emitted to the upper light receiving unit 94 and the lower light emitting unit 62. It can be used effectively.

  Moreover, although the board | substrate conveyance apparatus of this invention was applied to the electronic component mounting apparatus as a printed circuit board assembly apparatus, you may apply not only to this but an adhesive agent coating apparatus.

  Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the present invention is not limited to the various embodiments described above without departing from the spirit of the present invention. It encompasses alternatives, modifications or variations.

It is a top view of a board | substrate conveyance apparatus. It is AA sectional drawing of FIG. 1 before raising a printed circuit board. It is a figure for demonstrating light emission and light reception by a light-emitting device and a light-receiving device. It is a side view of a light-emitting device. It is a side view of a light-receiving device. It is AA sectional drawing of FIG. 1 after raising a printed circuit board. It is AA sectional drawing of FIG. 1 in a state without a printed circuit board. It is a figure for demonstrating light emission and light reception by the light-emitting device and light-receiving device of other embodiment. It is a side view of a light-emitting device. It is a side view of a light-receiving device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printed circuit board conveying apparatus 2 Printed circuit board 3, 4 Conveying chute 5 Conveying belt 8 Light emitting apparatus 9 Light receiving apparatus 10, 13 Optical fiber 12 Light emitting element 14 Light receiving element 15 Microcomputer 83 Shielding board 84 Upper light emitting part 85 Lower light emitting part 93 Shielding board 94 Upper light-receiving unit 95 Lower light-receiving unit 60 Light-emitting device of another embodiment 61 Upper light-emitting unit 62 Lower light-emitting unit 70 Light-receiving device of another embodiment 71 Upper light-receiving unit 72 Lower light-receiving unit

Claims (5)

A substrate transport apparatus that transports a printed circuit board on which a predetermined operation is performed and detects the presence or absence of the printed circuit board, each corresponding to an upper level and a lower level where the printed circuit board is located. an upper light emitting portion and a lower light emitting unit that emits light in the horizontal direction toward a long vertical emission width than the thickness on the printed circuit board, facing the upper light emitting portion and the lower light emitting portion across the printed circuit board And an upper light receiving portion and a lower light receiving portion that receive light emitted from the upper light emitting portion and the lower light emitting portion and having a light receiving width in the vertical direction longer than the thickness of the printed circuit board. A substrate transfer device. A substrate transport apparatus for transporting a printed circuit board on which a predetermined operation is performed and detecting the presence or absence of the printed circuit board, wherein an upper level on which the predetermined operation is performed on the printed circuit board and a lower part for transporting the printed circuit board an upper light emitting portion and a lower light emitting unit that emits light in the horizontal direction toward the printed circuit board each have a light emission width of the longer than the thickness vertical direction of the printed circuit board is provided on the level, the upper light emitting across the printed circuit board And an upper light receiving portion that is disposed to face the lower light emitting portion and the lower light emitting portion and has a light receiving width in the vertical direction that is longer than a thickness of the printed circuit board and receives light emitted from the upper light emitting portion and the lower light emitting portion. And a lower light receiving portion .   A substrate transport apparatus for transporting a printed circuit board on which a predetermined operation is performed and detecting the presence or absence of the printed circuit board, wherein the printed circuit board has a light emission width in a vertical direction longer than a thickness of the printed circuit board. A light emitting device that emits light in a horizontal direction toward the light source, and a light receiving device that is disposed so as to face the light emitting device across the printed board and has a light receiving width in a vertical direction longer than a thickness of the printed board A light-receiving device that receives light emitted from the light-emitting device, wherein the light-emitting device has a light-emitting-side shielding member at a central portion, and the light-receiving device has a light-receiving-side shielding member facing the light-emitting-side shielding member. A substrate transfer device.   A substrate transport apparatus that transports a printed circuit board to be subjected to a predetermined operation and detects the presence or absence of the printed circuit board, wherein the printed circuit board is positioned at an upper level when positioning the printed circuit board in the height direction. A light emitting device that emits light in the horizontal direction toward the printed circuit board with a light emitting width in the vertical direction that is longer than the amount of movement in the vertical direction with respect to the lower level; and the light emitting device sandwiching the printed circuit board And a light receiving device that receives light emitted from the light emitting device and has a light receiving width in a vertical direction longer than the movement amount, and the light emitting device has a light emitting side shielding member at the upper level. And the lower level, and the light receiving device has a light receiving side shielding member facing the light emitting side shielding member.   A substrate transport apparatus for transporting a printed circuit board on which a predetermined operation is performed and detecting the presence or absence of the printed circuit board, wherein the printed circuit board is positioned in the height direction of the printed circuit board. Light emitting in the horizontal direction toward the printed circuit board with a light emission width in the vertical direction that is longer than the amount of movement moved in the vertical direction between the upper level for performing predetermined work and the lower level for transporting the printed circuit board A light-emitting device that is disposed so as to face the light-emitting device across the printed circuit board, and has a light-receiving width in the vertical direction that is longer than the movement amount and receives light emitted from the light-emitting device. The light emitting device has a light emitting side shielding member between the upper level and the lower level, and the light receiving device has a light receiving side shielding member facing the light emitting side shielding member. DOO substrate transfer apparatus and solving.