JP2011029527A - Component mounting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a component mounting device such that a rotary multi-nozzle type mounting head is shortened in response time of vacuum suction, and made compact in size on the whole. <P>SOLUTION: A plurality of suction nozzle units 20 are concentrically arranged at equal intervals on a rotary body 12 which makes an index rotation, and pluralities of valve units 21 and filters 22 are concentrically arranged outside the suction nozzle units 20. A suction hole 11b provided in a rotary shaft 11 and connected to a vacuum suction source, and the valve units 21 are connected in the rotary body 12 thorough flow passage holes 12b arranged radially between the plurality of suction nozzles units 20, the valve units 21 and filters are connected through flow passage holes 13c, and the filters 22 and suction nozzle units 20 are connected through flow passage holes 13e. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a component mounting apparatus for mounting electronic components on a substrate.

  A component mounting apparatus for mounting an electronic component on a substrate includes a mounting head that takes out the electronic component from the component supply unit and transfers and mounts the electronic component on the substrate. As a form of this mounting head, a multi-nozzle type mounting head is widely used which includes a plurality of suction nozzles for sucking and holding electronic components and mounts a plurality of electronic components in one mounting turn to improve mounting efficiency. Yes.

  As such a multi-nozzle type mounting head, a rotary type multi-nozzle type head is known in which a plurality of suction nozzles are arranged in a concentric circle on a rotating body that rotates in an index (see, for example, Patent Document 1). By adopting such a rotary format, the size of the mounting head can be reduced even when a larger number of suction nozzles are equipped than in the past, compared to a multi-nozzle head with a configuration in which a plurality of suction nozzles are arranged in series. There is an advantage that it can be made compact.

Japanese Patent Laid-Open No. 10-163677

  However, the conventional prior art examples including the above-mentioned patent documents have the following disadvantages related to the layout of the vacuum suction system for vacuum suction from the suction nozzle. In other words, in order to pick up a component by the suction nozzle and to perform the operation of picking up the component or mounting it on the substrate, a switching valve for turning on and off the vacuum suction path for vacuum suction from the suction nozzle is required. However, in the conventional apparatus, since the switching valve is arranged in the middle of the vacuum suction pipe connecting the mounting head, the vacuum suction source provided outside and the suction nozzle, the tip of the suction nozzle from the switching valve. There is a problem that the pipe line length becomes longer and the response time at the time of vacuum suction on / off becomes longer.

  Further, in order to prevent an operation failure caused by suction of foreign matter to the switching valve or the piping system, it is necessary to dispose a foreign matter removing filter between the suction nozzle and the switching valve in the vacuum piping system. However, in the conventional apparatus, a method for properly arranging the filters in the rotary type multi-nozzle head is not shown, and it is difficult to reduce the size of the entire mounting head.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a component mounting apparatus capable of reducing the response time of vacuum suction and reducing the size of the entire mounting head in a rotary type multi-nozzle mounting head.

A component mounting apparatus according to the present invention is a component mounting apparatus for mounting a component taken out from a component supply unit onto a substrate held by a substrate holding unit, and a mounting head for picking up and holding the component from the component supply unit; A head moving mechanism for moving the mounting head in a direction parallel to the component mounting surface of the substrate, the mounting head rotating around the rotation axis by an index driving mechanism, and the rotating body A plurality of suction nozzles that are disposed so as to be movable up and down with respect to the rotating body at a position around the rotation axis, and that suck and hold the components by vacuum suction from a suction hole opened at a lower end portion; A first air path which is provided in the rotating body so as to be inserted through the inside of the rotating shaft in the axial direction and connected to a vacuum suction source; The plurality of suction nozzles are arranged radially, the first air path communicates with one end, and is arranged outside the suction nozzle to connect and disconnect the vacuum suction from the suction holes. A second air path that communicates between the air pressure switching means and the other end, and the air pressure switching means communicates with one end to collect the foreign matter sucked from the suction hole and A fourth air path in which the filter and the end on the other side communicate with each other, a third air path in which the filter and the other end on the other side communicate with each other, the filter and the one end on the other side communicate with each other. Air path.

  According to the present invention, the first air path that is provided by passing through the inside of the rotary shaft in the vertical direction and connected to the vacuum suction source in the rotary body that rotates with the index and has a plurality of suction nozzles, and rotates in the rotary body. Pneumatic pressure that is arranged radially between a plurality of suction nozzles with the axis as the center, the first air path communicates with the end on one side, and is arranged outside the suction nozzle to connect and disconnect the vacuum suction from the suction holes A second air path in which the switching means and the other end communicate with each other, and a pneumatic pressure switching means communicates with the one end to collect the foreign matter sucked from the suction hole, and is disposed outside the suction nozzle. A third air path that communicates between the filter and the other end, and a fourth air path that communicates between the filter and one end and the suction nozzle and the other end. The multinozzle of the rotary type In type mounting head, with shortening the response time of the vacuum suction, it is possible to compact the overall size of the mounting head.

The perspective view of the component mounting apparatus of one embodiment of this invention The perspective view of the mounting head with which the component mounting apparatus of one embodiment of this invention is mounted | worn The front view of the mounting head with which the component mounting apparatus of one embodiment of this invention is mounted | worn Sectional drawing of the mounting head with which the component mounting apparatus of one embodiment of this invention is mounted | worn The fragmentary sectional view of the mounting head with which the component mounting apparatus of one embodiment of the present invention is mounted. The fragmentary sectional view of the mounting head with which the component mounting apparatus of one embodiment of the present invention is mounted. The fragmentary sectional view of the mounting head with which the component mounting apparatus of one embodiment of the present invention is mounted. Operation explanatory diagram of the mounting head mounted on the component mounting apparatus of one embodiment of the present invention

  Next, embodiments of the present invention will be described with reference to the drawings. First, the structure of the component mounting apparatus 1 will be described with reference to FIG. In FIG. 1, a substrate transport mechanism 2 is arranged on the upper surface of a base 1a in the substrate transport direction (X direction). The board conveyance mechanism 2 receives and conveys the board 3 to be mounted from the upstream apparatus, and positions and holds it at a mounting work position by the component mounting mechanism described below. Accordingly, the substrate transport mechanism 2 functions as a substrate holding unit. On both sides of the base 1a, component supply units 4 are arranged. The component supply unit 4 is configured by arranging a plurality of tape feeders 5 side by side on the feeder table 4a. The tape feeder 5 pitches a carrier tape containing components to be mounted on the substrate 3 to feed components. This is supplied to the take-out position by the mounting head 8 of the component mounting mechanism.

The component mounting mechanism will be described. A Y-axis moving table 6 is disposed in the Y direction at the end of the base 1a in the X direction. Two X-axis moving tables 7 are mounted on the Y-axis moving table 6 so as to be movable in the Y direction. ing. A mounting head 8 is mounted on each X-axis moving table 7 via a holding frame 9 (see FIG. 2). The mounting head 8 has a function of picking up and holding components mounted on the board 3 from the component supply unit 4, and driving the Y-axis moving table 6 and the X-axis moving table 7 allows the mounting head 8. Moves horizontally in the X direction and the Y direction, and the components taken out from the component supply unit 4 are mounted on the substrate 3 positioned and held by the substrate transport mechanism 2. The Y-axis moving table 6 and the X-axis moving table 7 constitute a head moving mechanism that moves the mounting head 8 in a direction parallel to the component mounting surface of the substrate 3.

  Next, the structure of the mounting head 8 will be described with reference to FIGS. 2, 3, 4, and 5. In FIG. 2, the holding frame 9 is fixed to a moving portion (not shown) that moves in the X direction on the X-axis moving table 7, and a horizontal base portion 9 a is provided extending from the upper portion of the holding frame 9 in the horizontal direction. Yes. An index driving mechanism 10 is vertically arranged on the upper surface of the horizontal base portion 9a. As shown in FIG. 4, the rotary shaft 11 extending downward from the index driving mechanism 10 has a substantially cylindrical shape. The body 12 is fixed. The rotating body 12 is rotatably held via a bearing 37 a by an intermediate base portion 14 extending in the horizontal direction from an intermediate position of the holding frame 9. The lower portion of the rotating shaft 11 is a shaft lower portion 11a having a different level, and the lower end portion of the shaft lower portion 11a is similarly supported by a lower base portion 17 extending horizontally from the lower end portion of the holding frame 9 via a bearing 37b. It is pivotally supported. By driving the index driving mechanism 10, the rotating body 12 rotates with the rotating shaft 11 in an index pattern with a predetermined intermittent pattern (arrow a).

  In the rotator 12, a plurality (16 in this case) of suction nozzle units 20 (suction nozzles) are arranged at a circumferential position around the rotation shaft 11 (a concentric position with a radius R <b> 1 shown in FIG. 5). 12 is arranged so as to be movable up and down. The lower end portion of the nozzle shaft 41 constituting the suction nozzle unit 20 is a nozzle mounting portion 41b, and a nozzle component 41d is detachably mounted on the nozzle mounting portion 41b. The nozzle component 41d sucks and holds the component to be mounted (not shown) by vacuum suction from the suction hole 41g (FIG. 6) opened at the lower end.

  The upper portion of the rotating body 12 is an outer edge portion 13 extending in the outer peripheral direction, and the valve unit 21 and the filter 22 are disposed on the outer edge portion 13 outside the circumferential position where the suction nozzle unit 20 is disposed (FIG. 5). (Refer to the position on the concentric circle of radius R2 shown in FIG. 1), and is arranged in a one-to-one correspondence with each suction nozzle unit 20. The valve unit 21 has a function as air pressure switching means for connecting and disconnecting vacuum suction from the suction hole 41g and stepping in supply of positive pressure air injected from the suction hole 41g. It has a function of collecting foreign matter sucked from 41g.

  A suction hole 11 b is provided in the lower portion of the rotating shaft 11 so as to be inserted through the inside in the vertical direction. The suction hole 11 b communicates with a suction path 17 a provided in the lower base portion 17. The suction path 17a communicates with a connection hole 17b connected to a suction pipe 27 (FIG. 3), and the suction pipe 27 is connected to a vacuum suction source 28. By driving the vacuum suction source 28, vacuum suction is performed from the through-hole 11c provided in the upper portion of the suction hole 11b, and thereby, the communication gap 12a provided by enclosing the rotary shaft 11 inside the rotating body 12. The inside is aspirated. The suction hole 11 b is provided in the rotating body 12 so as to pass through the inside of the rotating shaft 11 in the vertical direction, and serves as a first air path connected to the vacuum suction source 28.

From the communication gap 12a, flow passage holes 12b are provided radially toward the valve units 21 through the suction nozzle units 20 (see FIG. 5), and the valve units 21 are disposed on the horizontal base portion 9a. When the contact drive tool 26 is moved up and down (arrow b) by the valve drive mechanism 25, the upper contact member 26b and the lower contact member 26c branched from the vertical member 26a are brought into contact with the valve unit 21 and slid. It is operated by. Thereby, the vacuum suction through the channel hole 12b can be opened and closed, and the vacuum suction by the suction hole 41g can be connected or disconnected. A positive pressure supply source 39 is connected to the positive pressure hole 26d provided in the upper contact member 26b via a piping member 38, and the valve unit 21 is operated in a state where the positive pressure supply source 39 is driven. Thus, it is possible to supply positive pressure air from the upper contact member 26b through the valve unit 21 and eject the air from the suction hole 41g.

  From the lower surface of the rotating body 12 and the intermediate base portion 14, a lifting guide portion 16 and a cylindrical cam portion 15 are provided extending downward. The cam follower 29 mounted above the nozzle mounting portion 41b is guided by a guide groove 16a formed in the up-down direction in the elevating guide portion 16 and is movable up and down. A compression spring 46 is mounted between the top portion 41a and the gear member 36 on the upper portion of the nozzle shaft 41 (FIG. 6). 15 is always in contact with the cam surface 15a on the lower surface.

  By driving the index driving mechanism 10, the rotating body 12 is index-rotated together with the rotating shaft 11, whereby the plurality of suction nozzle units 20 move intermittently along the circumference of the radius R 1 and the cam shape of the cam surface 15 a is formed. Follows to move up and down. In the intermittent movement of the suction nozzle unit 20, the lowered position P1 shown in FIG. 3 is a position where the nozzle component 41d performs the component extraction operation and the mounting operation. A nozzle raising / lowering driving mechanism 24 is disposed above the lowered position P1 and held by the horizontal base portion 9a. A cam follower 24b is coupled to the raising / lowering block 24a that is raised and lowered by the nozzle raising / lowering driving mechanism 24. By driving the nozzle lifting / lowering drive mechanism 24, the cam follower 24b moves up and down (arrow c), and when lowered, comes into contact with the nozzle shaft 41 of the suction nozzle unit 20 located at the lowered position P1 and pushes down. As a result, the nozzle component 41d further descends by a predetermined operation stroke at the lowered position P1, and performs the component pickup operation and mounting operation.

  The holding frame 9 is equipped with a camera 19 and an imaging optical system 19a. A position of the lower base portion 17 facing the imaging optical system 19a is a recognition position P2 where the camera 19 recognizes a component. At the recognition position P2, a reflection block 18 having a reflection surface 18a in an obliquely upward direction is attached to the lower base portion 17. The nozzle component 41d that sucks and holds the component at the lowered position P1 moves to the recognition position P2, so that the component held by the nozzle component 41d can be imaged by the camera 19 through the reflecting surface 18a. The nozzle component 41d is provided with a reflection plate 41c extending in a disk shape on the side, and when imaging by the camera 19, the reflection plate 41c reflects illumination light from below to illuminate the component from behind.

  A gear member 35 is rotatably mounted on a portion of the rotating shaft 11 protruding upward from the rotating body 12 via bearings 34 a and 34 b, and a pulley 33 is coupled to the upper portion of the gear member 35. A nozzle θ drive motor 23 is disposed on the horizontal base portion 9a with the rotary shaft 23a positioned downward, and a pulley 31 is coupled to the rotary shaft 23a. A belt 32 is tuned to the pulley 31 and the pulley 33, and the gear member 35 is rotated by driving the nozzle θ drive motor 23. A gear portion 35a that meshes with the gear member 36 mounted on the nozzle shaft 41 is provided below the gear member 35. By driving the nozzle θ drive motor 23, the belt 32, the pulley 33, the gear member 35, The nozzle shaft 41 can be rotated via the gear member 36. Thereby, the alignment of the component held by the nozzle component 41d in the θ direction (direction around the nozzle axis) is performed.

Next, the detailed structure of the suction nozzle unit 20 will be described with reference to FIG. As shown in FIG. 6, a nozzle shaft 41 is vertically inserted through a nozzle insertion hole 12 c (see FIG. 5) formed in the rotating body 12 so as to penetrate in a vertical direction on a concentric circle having a radius R <b> 1. The gear member 36 through which the nozzle shaft 41 is inserted vertically is provided to transmit rotation to the nozzle shaft 41 and be relatively movable in the vertical direction. The gear member 36 is coupled to a housing 42a that holds the ball spline 45a from the outer periphery, and a color ring 47 is interposed between the gear 42 and the ball spline 45a in a concentric housing 42b that is positioned below the housing 42a. Thus, the ball spline 45b is held. The nozzle shaft 41 is inserted into the ball splines 45a and 45b so as to be slidable in the vertical direction with the positions in the X, Y and θ directions being guided, and the housings 42a and 42b are rotated by bearings 43. 12 is held to be rotatable.

  A communication gap 49 is formed between the housings 42a and 42b and the nozzle insertion hole 12c. The communication gap 49 is provided between the housings 42a and 42b and the inner peripheral surface of the nozzle insertion hole 12c. It is sealed by a seal member 44. A communication gap 47a formed between the color ring 47 and the nozzle shaft 41 communicates with a flow passage hole 41e provided through the nozzle shaft 41 in the vertical direction and a through hole 41f. The passage hole 41e is inserted into the nozzle mounting portion 41b and communicates with the suction hole 41g. The communication gap 47a communicates with the communication gap 49 through a communication hole 48 that penetrates the housing 42b and the collar ring 47 in the lateral direction. Further, the communication gap 49 is filtered through the flow path hole 13e. It communicates with 22 filter holes 13d (see FIG. 7B).

  The nozzle shaft 41 passes through the block 30 to which the cam follower 29 is coupled above the nozzle mounting portion 41 b via a bearing 30 a, and the block 30 is rotatable with respect to the nozzle shaft 41. Thereby, the nozzle shaft 41 can be rotated to an arbitrary position in a state where the cam follower 29 is fitted in the guide groove 16a and the position in the rotation direction is fixed.

  Next, the structure of the valve unit 21 and the filter 22 will be described with reference to FIG. In FIG. 7A, a valve shaft 50 is slidably fitted up and down in a spool hole 13a provided through the outer edge portion 13 up and down. The valve shaft 50 is mounted on the upper portion of the valve shaft 50 so that the top portion 50a that contacts the upper contact member 26b protrudes upward from the outer edge portion 13 and the lower portion 50b that contacts the lower contact member 26c protrudes downward from the outer edge portion 13. Has been.

  The valve shaft 50 is formed with a channel hole 50c that opens to the top 50a. A communication hole 50d provided at the lower end of the channel hole 50c communicates with the spool hole 13a and is provided in the outer edge portion 13. The expanded diameter portion 13b communicates. The valve shaft 50 is provided with notch portions 50e and 50f and a reduced diameter portion 50g cut out on the outer peripheral surface. When the ball 51a of the ball plunger 51 is fitted into one of the notch portions 50e and 50f, the valve shaft The vertical position of 50 is fixed at two positions. Further, a communication gap 52 is formed in the range of the reduced diameter portion 50g between the inner surface of the spool hole 13a, and the communication gap 52 communicates with a flow path hole 13c formed in the outer edge portion 13 in the horizontal direction. (See also FIG. 5).

  In FIG. 7B, a filter member 54 in which a porous material such as a sintered member is formed into a hollow rod shape having an inner hole 54 a is inserted into the filter hole 13 d provided in the outer edge portion 13. The fixing member 53 is fixed from the upper surface side. The communication gap 55 between the outer periphery of the filter member 54 and the inner peripheral surface of the filter hole 13d communicates with the communication gap 49 of the suction nozzle unit 20 through the flow path hole 13e. Further, the communication gap 13f formed below the filter hole 13d communicates with the flow path hole 13c shown in FIG. That is, the flow path hole 13c communicates with the communication gap 49 of the suction nozzle unit 20 through the filtering member 54 and the flow path hole 13e.

  As shown in FIG. 8A, the abutting drive tool 26 is raised (arrow d) so that the lower abutting member 26c abuts on the lower portion 50b and the notch portion 50f is fixed at the position of the ball plunger 51. The flow path hole 13 c communicates with the flow path hole 12 b through the communication gap 52. As a result, the flow path hole 12 b communicates with the suction nozzle unit 20 via the flow path hole 13 c and the filter 22. In this state and by vacuum suction from the flow path hole 12b (arrow e), vacuum suction is performed from the suction hole 41g.

  At this time, the foreign matter sucked from the suction hole 41 g by vacuum suction is collected by the filtering member 54. By disposing the filter 22 in the immediate vicinity of the suction nozzle unit 20 in this way, foreign matter can be efficiently collected by the suction nozzle unit 20. Further, by arranging the filter 22 at a site on the outside of the suction nozzle unit 20 where work access is easy, maintenance work such as replacement of the filter member 54 can be easily performed.

  Further, as shown in FIG. 8B, in the state where the contact driving tool 26 is lowered (arrow f), the upper contact member 26b is contacted with the top 50a, and the notch 50e is fixed at the position of the ball plunger 51. The positive pressure hole 26d communicates with the flow path hole 50c, the flow path hole 12b is closed by the valve shaft 50, and vacuum suction is blocked from the flow path hole 12b. At this time, since the valve unit 21 is arranged in the immediate vicinity of the suction nozzle unit 20, the responsiveness at the time of vacuum suction on / off by the suction nozzle unit 20 when the valve unit 21 is operated is improved. Then, by operating the positive pressure supply source 39 in this state (arrow g), positive pressure air is given into the flow path hole 50c, and this positive pressure air is connected to the communication gap 52, the flow path hole 13c, the filter 22, the flow. It communicates with the suction nozzle unit 20 via the passage hole 13e and is ejected from the suction hole 41g.

  As described above, the mounting head 8 shown in the present embodiment is disposed on the rotating body 12 so as to be movable up and down with respect to the rotating body 12 at a position around the rotating shaft 11 and has a hole at the lower end. A plurality of suction nozzle units 20 that suck and hold components by vacuum suction from the suction holes 41g, and the rotary body 12 are provided so as to be vertically inserted through the rotary shaft 11 and connected to a vacuum suction source 28. The suction hole 11b (first air path) and a plurality of index drive mechanisms 10 are arranged radially around the rotation shaft 11 in the rotating body 12, and the suction hole 11b and one end thereof are connected to a communication gap. The valve unit 21 (pneumatic pressure switching means) that communicates with the valve 12a and that is disposed outside the suction nozzle unit 20 and connects and disconnects the vacuum suction from the suction hole 41g communicates with the other end. A hole 12b (second air path) communicates with the valve unit 21 on one end thereof, and a filter 22 disposed outside the suction nozzle unit 20 for collecting foreign matter sucked from the suction hole 41g. A channel hole 13c (third air path) that communicates with the other end, a channel 22e that communicates with the filter 22 and one end, and the suction nozzle unit 20 communicates with the other end. (Fourth air path).

  By adopting such a configuration, the response time at the time of vacuum suction ON / OFF can be shortened as described above, and in the multi-nozzle type mounting head having a plurality of suction nozzles, the mounting head can be made compact. Realized. That is, as compared with a conventional multi-nozzle type mounting head in which a plurality of nozzle rows in which suction nozzles are arranged in series are arranged, the size of the nozzle row in the row direction is shortened and the size of the entire mounting head is shortened. be able to.

  The component mounting apparatus of the present invention has the effect of reducing the response time of vacuum suction and reducing the size of the entire mounting head in a rotary type multi-nozzle mounting head, and is capable of reducing the size of the mounting head. This is useful in the field of mounting components.

DESCRIPTION OF SYMBOLS 1 Component mounting apparatus 2 Board | substrate conveyance mechanism 3 Board | substrate 4 Component supply part 6 Y-axis movement table 7 X-axis movement table 8 Mounting head 10 Index drive mechanism 11 Rotating shaft 11b Suction hole 12 Rotating body 12b Channel hole 13 Outer edge part 13c Channel Hole 13e Channel hole 20 Suction nozzle unit 21 Valve unit 22 Filter

Claims (2)

A component mounting apparatus for mounting a component taken out from a component supply unit on a substrate held by a substrate holding unit,
A mounting head that picks up and holds the component from the component supply unit; and a head moving mechanism that moves the mounting head in a direction parallel to the component mounting surface of the substrate;
The mounting head is provided with a rotating body that rotates with an index driving mechanism together with a rotating shaft, and is disposed at a position around the rotating shaft in the rotating body so as to be movable up and down with respect to the rotating body. A plurality of suction nozzles for sucking and holding the parts by vacuum suction from the opened suction holes;
A first air path which is provided in the rotating body so as to be inserted in the axial direction inside the rotating shaft and connected to a vacuum suction source;
In the rotating body, the plurality of suction nozzles are radially arranged around the rotation axis, the first air path communicates with one end, and is disposed outside the suction nozzle. A pneumatic switching means for connecting / disconnecting vacuum suction from the suction hole and a second air path communicating with the other end;
The air pressure switching means communicates with the end on one side, collects the foreign matter sucked from the suction hole, and communicates with the filter disposed outside the suction nozzle and the end on the other side. Air path,
A component mounting apparatus, comprising: a fourth air path in which the filter and the end on one side communicate with each other, and the suction nozzle and the other end on the other side communicate with each other.   2. The component mounting apparatus according to claim 1, wherein in the rotating body, the air pressure switching unit and the filter are arranged on a concentric circle with the rotation axis as a center.

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