JP2008053575A - Mounting head and electronic component mounting apparatus - Google Patents

Abstract

A mounting head and an electronic component mounting apparatus are provided that have a simplified structure and a reduced maintenance burden.
SOLUTION: Each nozzle center includes a plurality of nozzles arranged in parallel in the same direction, and rotation driving means for rotating each nozzle around the axis, and the rotation driving means is an axis. a motor 17 having a rotating shaft 17a in which a2 is oriented in the same direction as the axis a1 of the nozzle 14, and a drive magnet cylinder 18 in which permanent magnet strips having different polarities are alternately arranged in the circumferential direction on the outer periphery of the rotating shaft 17a; And a driven magnet cylinder 19 in which permanent magnet strips having different polarities are alternately arranged in the circumferential direction on the outer periphery of each nozzle 14, and the rotational driving force of the rotating shaft 17 a is adjacent to the driving magnet cylinder 18 in a non-contact state. Transmission is made to each nozzle 14 by a pulling force acting between the matching driven magnet cylinders 19 and a pulling force acting between the adjacent driven magnet cylinders 19 in a non-contact state.
[Selection] Figure 2

Description

  The present invention relates to a mounting head having a plurality of nozzles for adsorbing electronic components and an electronic component mounting apparatus.

In the field of electronic component mounting, an electronic component mounting apparatus including a nozzle that picks up an electronic component supplied from a parts feeder by suction is widely used. The nozzle is mounted on a mounting head that reciprocates between the parts feeder and the substrate, and repeatedly performs a mounting operation of picking up electronic components and transferring them to the substrate. Conventionally, for the purpose of improving the efficiency of this mounting operation, an electronic component mounting apparatus is known in which a plurality of nozzles are mounted on a mounting head so that a plurality of electronic components can be mounted at one time (Patent Document 1). reference).
Japanese Patent Laid-Open No. 2002-9491

  By the way, it is necessary to mount the electronic component by accurately aligning it with the mounting location on the board, so the nozzle is configured to be rotatable around the central axis, and the orientation of the sucked electronic component is adjusted to an arbitrary angle. It can be done. In the conventional electronic component mounting apparatus, a rotation transmission mechanism is used in which each nozzle is driven, and the rotation drive of the rotation drive unit on the driving side is transmitted to each nozzle by an endless belt tuned to each nozzle.

  However, in the conventional rotation transmission mechanism, a space for wrapping the endless belt between the nozzles is required, so that the mounting head is complicated and large. In addition, because of this space, there is a limit to shortening the distance between the nozzles, and there is a problem that it is not possible to cope with downsizing of the head. In addition, since an endless belt made of rubber or other elastic material is used as the drive transmission means, the tension of the endless belt is periodically adjusted to accurately transmit the rotational drive to the nozzle located away from the drive side. It was necessary to carry out replacement, which was a burden on maintenance.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a mounting head and an electronic component mounting apparatus that have a simplified structure and a reduced maintenance burden.

  The mounting head according to claim 1, comprising a plurality of nozzles arranged in parallel with the respective axes oriented in the same direction, and rotation drive means for rotating the plurality of nozzles around the axes. The rotation drive means has a rotation drive unit having a rotation axis whose axis is oriented in the same direction as the axis of the nozzle, and permanent magnet strips having different polarities on the outer periphery of the rotation axis alternately arranged in the circumferential direction. A driving magnet cylinder and a driven magnet cylinder in which permanent magnet strips having different polarities are alternately arranged in the circumferential direction on the outer circumferences of the plurality of nozzles, and the rotational driving force of the rotating shaft is the driving magnet. It is transmitted to the plurality of nozzles by a pulling force acting between the cylinder and the driven magnet cylinder adjacent in a non-contact state and a pulling force acting between the driven magnet cylinders adjacent in a non-contact state.

The mounting head according to claim 2, comprising: a plurality of nozzles arranged in parallel with each axis oriented in the same direction; and a rotation driving means for rotating the plurality of nozzles around each axis, The rotation drive means has a rotation drive section having a rotation shaft whose axis is directed in the same direction as the axis of the nozzle, and a drive magnet cylinder in which permanent magnet strips having different polarities are spirally arranged on the outer periphery of the rotation shaft A driven magnet cylinder in which permanent magnet strips having different polarities are spirally arranged on the outer circumferences of the plurality of nozzles, and a transmission shaft having an axis oriented in a direction perpendicular to the axis of the nozzle and the rotation shaft, A transmission magnet cylinder in which permanent magnet strips having different polarities are spirally arranged on the outer periphery of the transmission shaft, and the rotational drive force of the rotary shaft is adjacent to the drive magnet cylinder in a non-contact state. Pulling force working between magnet cylinder and front It is transmitted to the plurality of nozzles by 引斥 force acting between the driven magnets tube adjacent transmission magnet tube and in a non-contact state.

  According to a third aspect of the present invention, there is provided an electronic component mounting apparatus including the mounting head according to the first or second aspect, wherein the electronic component picked up by the nozzle is rotated around the axis in an arbitrary posture. Mount on the board.

  According to the present invention, since the rotational driving force of the rotational driving unit can be transmitted to the plurality of nozzles by the pulling force of the permanent magnet, the structure of the mounting head and the electronic component mounting apparatus is simplified and the burden on maintenance is reduced. can do.

  Embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of an electronic component mounting apparatus according to an embodiment of the present invention, FIG. 2 is a side view of a mounting head according to the embodiment of the present invention, and FIG. 3 shows an arrangement of magnet cylinders according to the embodiment of the present invention. FIG. 4 is a plan view showing the arrangement of magnet cylinders according to another embodiment of the present invention.

  First, the configuration of the electronic component mounting apparatus according to the embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the overall configuration of an electronic component mounting apparatus. In the figure, an electronic component mounting apparatus 1 has a function of transferring an electronic component supplied from an electronic component supply unit 2 onto a substrate 4 by a mounting head 3. The electronic component supply unit 2 is provided opposite to both sides of the electronic component mounting apparatus 1, and includes a plurality of parts feeders 5. Each parts feeder 5 contains a plurality of electronic components and is supplied in a predetermined posture to an electronic component supply port 6 that opens upward. Between the electronic component supply units 2 provided to face each other, a substrate transfer unit 7 is provided. The substrate transport unit 7 is composed of a pair of transport rails 8 that traverse the electronic component mounting apparatus 1, and transports the substrate 4 that is supported on both sides of the pair of transport rails 8. The substrate transfer unit 7 has a substrate holding function for holding the substrate 4 at a predetermined position by bringing the pair of transfer rails 8 close to each other.

  The mounting head 3 is configured to be horizontally movable above the electronic component supply unit 2 and the substrate transfer unit 7 by the orthogonal robot 9. FIG. 2 shows the configuration of the mounting head. In the figure, the mounting head 3 is provided with a plurality of nozzle units 10. Each nozzle unit 10 is provided with a nozzle shaft 11 and a spline bearing 12, and each nozzle shaft 11 is configured to be movable up and down with respect to each spline bearing 12. Each of the spline bearings 12 is aligned at a predetermined height so as not to move up and down, and is configured to be rotatable at each position. A nozzle holder 13 is provided at the lower end of each nozzle shaft 11, and a nozzle 14 is detachably attached to each nozzle holder 13 (the mounting head according to the present embodiment has four front rows and rear rows). 4 nozzles, 8 nozzles in total are installed). The nozzles 14 are arranged in the horizontal direction with their axis a1 oriented in the vertical direction, and are configured to be rotatable around the axis a1 in conjunction with the rotation of the spline bearing 12. Further, each nozzle holder 13 communicates with a vacuum generation source (not shown), and an electronic component is adsorbed to each nozzle 14 by vacuuming the inside of the nozzle 14 attached to each nozzle holder 13.

In the figure, the mounting head 3 is provided with a substrate recognition camera 15. The substrate recognition camera 15 functions as an imaging unit that images a recognition mark provided in advance on the substrate 4, and analyzes the image of the captured recognition mark, thereby determining the positions of a plurality of mounting locations provided on the substrate 4. It is possible to grasp. When mounting the electronic component on the substrate 4, the electronic component attracted to each nozzle 14 by the horizontal movement of the mounting head 3 is accurately aligned with the mounting position of the substrate 4. In FIG. 1, a component recognition camera 16 is provided between the electronic component supply unit 2 and the board transport unit 7. The component recognition camera 16 functions as an image pickup unit that picks up an electronic component sucked by each nozzle 14 from below, and analyzes the image of the picked-up electronic component to thereby detect the electronic component with respect to the axis a1 of each nozzle 14. The suction position and posture can be grasped. When the electronic component is mounted on the substrate 4, the position of the electronic component is corrected by the horizontal movement of the mounting head 3 itself, and the rotation angle of the electronic component is corrected by the rotation of each nozzle 14 around the axis a1. As described above, the mounting head 3 is horizontally moved based on the analysis results of the captured images by the board recognition camera 15 and the component recognition camera 16 and the nozzles 14 are rotated around the axis a1 so that the electronic components are accurately positioned. Can be mounted on the mounting position of the substrate 4 in the posture.

  In the figure, the mounting head 3 is provided with a motor 17. The motor 17 has a posture in which the axis a2 of the rotation shaft 17a is directed in the vertical direction. A cylindrical drive magnet cylinder 18 is inserted into the outer periphery of the rotary shaft 17a. A cylindrical driven magnet cylinder 19 is also inserted into the outer periphery of each spline bearing 12, and is aligned at the same height as the drive magnet cylinder 18. Here, the magnet cylinder is formed by alternately arranging N-pole and S-pole permanent magnet strips in the circumferential direction, and the outer circumferential surfaces are arranged at predetermined intervals with their respective axial centers directed in the same direction. When facing each other, the rotation of one magnet cylinder is transmitted to the other magnet cylinder by the attractive force and the repulsive force acting between the opposing magnet strips, and the opposing magnet cylinder is synchronously rotated in the opposite direction.

  FIG. 3 shows the arrangement of the magnet cylinders in the mounting head. The driven magnet cylinder 19 is provided in each of the nozzle units 10 provided in the mounting head 3, and in the mounting head of the present embodiment, four are provided in the front row and four are provided in the rear row. Adjacent driven magnet cylinders 19 in each row are juxtaposed in a non-contact state with an interval b1, and an interval b2 is provided between the front row and the rear row. The interval b1 is an interval necessary for transmitting the rotational driving force between the adjacent driven magnet cylinders 19, and an optimal value is set depending on the type of the magnet cylinder to be used. The interval b2 is set such that one rotational driving force does not affect the other between the driven magnet cylinders 19 facing each other in the front and rear rows. Therefore, the rotational driving force transmitted between the driven magnet cylinders 19 acts only between the adjacent driven magnet cylinders 19 in the front row or the rear row, and does not act between the driven magnet tubes 19 facing each other in the front and rear rows.

  In the figure, a magnet cylinder 20 of the same type as the drive magnet cylinder 18 and the driven magnet cylinder 19 is arranged with an interval b1 between each of the driven magnet cylinders 19 and the drive magnet cylinder 18 arranged at the ends of the front and rear rows. Has been. The magnet cylinder 20 is arranged with its axis a3 oriented in the same direction as the axis a2 of the rotating shaft 17a and the axis a1 of each nozzle 14, and can transmit rotational driving force between adjacent magnet cylinders. (See FIG. 2). Thereby, the rotation of the drive magnet cylinder 18 in the direction of the arrow c is conducted as the rotation of the magnet cylinder 20 in the d direction, and the rotation of the magnet cylinder 20 in the d direction is each follower arranged at the end of the front and rear rows. The magnet cylinder 19 is transmitted as a rotation in the c direction, and the rotation of the driven magnet cylinder 19 in the c direction is alternately transmitted as a rotation in the reverse direction to the adjacent driven magnet cylinder 19 in each row. Accordingly, when the drive magnet cylinder 18 is rotated in either direction (arrow c or arrow d direction) by forward / reverse rotation of the rotation shaft 17a of one motor 17 functioning as a rotation drive unit, a driven magnet cylinder 19 is provided. All spline bearings 12 can be rotated in either direction. Thereby, the rotation angle correction of the electronic component adsorbed by each nozzle 14 can be performed.

Thus, each nozzle 14 is provided on each of the motor 17 having the rotation shaft 17a with the axis a2 oriented in the same direction as the axis a1 of each nozzle 14, and the outer periphery of each of the rotation shaft 17a and each nozzle 14. It is comprised so that it can rotate around each axial center a1 by the rotational drive means comprised with the magnet cylinders 18 and 19 which alternately arrange | positioned the permanent magnet strip from which polarity differs in the circumferential direction. As described above, this rotational driving means enables transmission of rotational driving force in a non-contact state, so that mechanical wear and deterioration do not occur, and the work load in maintenance can be greatly reduced. Further, since the contact portion is eliminated, it is possible to reduce oscillation and dust generation as much as possible, so that the mounting quality can be improved. Furthermore, since the structure is relatively simple, the mounting head can be reduced in size and weight, and space control can be improved and position controllability can be improved by reducing inertial mass.

  The magnet cylinder 20 is disposed in view of the space for providing the motor 17 for rotating the drive magnet cylinder 18, and is not essential for realizing the present invention. Further, the magnet cylinder can be arranged as shown in FIG. 4 in addition to the arrangement shown in FIG. In FIG. 4, the driven magnet cylinder 30 is provided in each of the nozzle units 10 provided in the mounting head 3. In the mounting head of the present embodiment, four are provided in the front row and four are provided in the rear row. . The adjacent driven magnet cylinders 30 in each row are juxtaposed in a non-contact state with an interval e1. Between the front row and the rear row, there is provided a transmission shaft 31 having an axis a4 oriented in a direction perpendicular to the axis a1 of each nozzle 14 and the axis a2 of the rotary shaft 17a. The transmission shaft 31 extends to the side of the drive magnet cylinder 32 provided on the rotating shaft 17a. In the motor 17, the axis a2 of the rotary shaft 17a is linear with the axis a1 of each nozzle 14 on the rear row side so that the drive magnet tube 32 is positioned on the extension of the driven magnet tube 30 juxtaposed on the rear row side. It is provided at a position lined up on f.

  The transmission shaft 31 is provided with a transmission magnet cylinder 33 at a position opposite to the four magnet cylinders 30 provided in the front and rear rows, and a transmission magnet cylinder 34 is provided at a position opposite to the magnet cylinder 32. . An interval e2 is provided between the driven magnet cylinder 30 and the transmission magnet cylinder 33, and the drive magnet cylinder 32 and the transmission magnet cylinder 34 provided in the front and rear rows. The interval e2 is an interval necessary for transmitting the rotational driving force between adjacent magnet cylinders, and an optimal value is set according to the type of magnet cylinder used. Note that the interval e1 between the adjacent driven magnet cylinders 30 in each row is set such that one rotational driving force does not affect the other between the adjacent driven magnet cylinders 30.

  Here, in order to transmit the rotational driving force when the rotation axes of the adjacent magnet cylinders are orthogonal, the permanent magnet strips arranged in the respective magnet cylinders are not arranged in parallel with the rotation axes, It is necessary to arrange so that both permanent magnet strips face each other by being inclined with respect to the rotation axis. Therefore, the adjacent drive magnet cylinder 32 and the transmission magnet cylinder 34, the driven magnet cylinder 30 and the transmission magnet cylinder 33 are adjacent to each other by forming the N-pole and S-pole permanent magnet strips alternately in a spiral shape. The rotational driving force can be transmitted as the rotational driving force in the orthogonal direction between the magnet cylinders. Thereby, the rotation of the drive magnet cylinder 32 in the direction of the arrow g is transmitted as the rotation of the transmission magnet cylinder 34 in the h direction, and the h direction of each transmission magnet cylinder 33 provided on the transmission shaft 31 together with the transmission magnet cylinder 34. Is transmitted as rotation in the i direction of each driven magnet cylinder 30 provided in the front and rear rows. Therefore, when the drive magnet cylinder 32 is rotated in either direction (arrow g or arrow j direction) by forward / reverse rotation of the rotation shaft 17a of one motor 17 functioning as a rotation drive unit, the driven magnet cylinder 30 is provided. All the spline bearings 12 can be rotated in the same direction. Thereby, the rotation angle correction of the electronic component adsorbed by each nozzle 14 can be performed.

  In addition, the axial center of each nozzle 14 can be obtained by appropriately changing the helical shape of the permanent magnets arranged in the driven magnet cylinder 30 and the transmission magnet cylinders 33 and 34 and arbitrarily changing the rotation direction of each driven magnet cylinder 30. The direction of rotation around a1 can be changed. Further, the mounting head and the electronic component mounting apparatus of the present invention are not limited to those in which a plurality of nozzles are arranged linearly, but may be other arrangements, for example, those arranged in a circle.

  According to the present invention, since the rotational driving force of the rotational driving unit can be transmitted to the plurality of nozzles by the pulling force of the permanent magnet, the structure of the mounting head and the electronic component mounting apparatus is simplified and the maintenance burden is reduced. It is advantageous in that it can be used and is useful in the field of electronic component mounting.

The top view of the electronic component mounting apparatus of embodiment of this invention Side view of mounting head according to an embodiment of the present invention The top view which shows arrangement | positioning of the magnet cylinder of embodiment of this invention The top view which shows arrangement | positioning of the magnet cylinder of other embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electronic component mounting apparatus 3 Mounting head 4 Board | substrate 14 Nozzle 17 Motor 17a Rotating shaft 18, 32 Drive magnet cylinder 19, 30 Driven magnet cylinder 31 Transmission shaft 33, 34 Transmission magnet cylinder a1 Axis of nozzle a2 Axis of axis of rotation a4 Center of transmission shaft

Claims (3)

A plurality of nozzles arranged in parallel with each axis oriented in the same direction, and rotation drive means for rotating the plurality of nozzles around each axis;
The rotation drive means has a rotation drive unit having a rotation axis whose axis is oriented in the same direction as the axis of the nozzle, and permanent magnet strips having different polarities on the outer periphery of the rotation axis alternately arranged in the circumferential direction. A drive magnet cylinder, and a driven magnet cylinder in which permanent magnet strips of different polarities are alternately arranged in the circumferential direction on the outer circumferences of the plurality of nozzles,
The plurality of rotation driving forces of the rotating shaft are caused by a pulling force acting between the driven magnet cylinders adjacent to the driving magnet cylinder in a non-contact state and a pulling force acting between the driven magnet cylinders adjacent to each other in a non-contact state. Mounting head transmitted to the nozzle. A plurality of nozzles arranged in parallel with each axis oriented in the same direction, and rotation drive means for rotating the plurality of nozzles around each axis;
The rotation drive means has a rotation drive section having a rotation shaft whose axis is directed in the same direction as the axis of the nozzle, and a drive magnet cylinder in which permanent magnet strips having different polarities are spirally arranged on the outer periphery of the rotation shaft A driven magnet cylinder in which permanent magnet strips having different polarities are spirally arranged on the outer circumferences of the plurality of nozzles, and a transmission shaft having an axis oriented in a direction perpendicular to the axis of the nozzle and the rotation shaft, And a transmission magnet cylinder in which permanent magnet strips having different polarities are spirally arranged on the outer periphery of the transmission shaft,
The rotational driving force of the rotating shaft is between a pulling force acting between the drive magnet cylinder and the adjacent transmission magnet cylinder in a non-contact state, and between the driven magnet cylinder adjacent to the transmission magnet cylinder in a non-contact state. A mounting head that is transmitted to the plurality of nozzles by a pulling force acting on An electronic component mounting apparatus comprising the mounting head according to claim 1, wherein the electronic component picked up by the nozzle is mounted on a substrate in an arbitrary posture by rotating around the axis.

Images