WO2016013126A1

WO2016013126A1 - Component mounting machine

Info

Publication number: WO2016013126A1
Application number: PCT/JP2014/069767
Authority: WO
Inventors: 丁王; 内藤真治
Original assignee: 富士機械製造株式会社
Priority date: 2014-07-25
Filing date: 2014-07-25
Publication date: 2016-01-28
Also published as: JPWO2016013126A1; JP6377747B2

Abstract

A component mounting machine (1) that is provided with a suction nozzle capable of adjusting the size and the like of a suction port. The component mounting machine is characterized by having: a transfer apparatus (2) that transfers a substrate to a predetermined position; a component supplying apparatus (3) having a plurality of components stored therein; a component mounting apparatus (4) that mounts a component on the substrate transferred by means of the transfer apparatus (2), said component having been taken out from the component supplying apparatus (3) by means of a mounting head (15) that is capable of sucking and holding the component; and a control apparatus (5) that controls the apparatuses (2, 3, 4). The component mounting machine is also characterized in that: the mounting head (15) is provided with a suction nozzle (50) that is provided with variable mechanisms (51, 52, 53, 54) that change the diameter or the shape of a suction port (531) to be in contact with the component; and operation mechanisms (37, 39, 41, 42) that operate the variable mechanisms of the suction nozzle (50).

Description

Parts mounting machine

The present invention relates to a component mounting machine equipped with a suction nozzle capable of adjusting the size and shape of the suction port.

For example, an electronic component mounting machine has a mounting head having a suction nozzle for mounting an electronic component on a circuit board, and the electronic component sucked and held by the suction nozzle is taken out from the component supply unit and is then mounted on the circuit board. It is attached to. Since there are various types of electronic components having different sizes and shapes, the mounting head uses a suction nozzle corresponding to the electronic component to be handled. That is, a plurality of suction nozzles are prepared in the electronic component mounting machine, and can be replaced with a mounting head as needed. In this regard, the electronic component mounting machine is provided with a nozzle accommodating portion (nozzle station) that accommodates a plurality of suction nozzles.

JP 2012-044018 A

However, the nozzle station does not ensure that much space for the electronic component mounting machine. It is necessary that the nozzle station be in the movable range of movement of the mounting head, and that it must be in a position where it can be exchanged efficiently in order to shorten the cycle time. This is because there are some restrictions. If it does so, the space allocated to a nozzle station will be limited, and the number of the suction nozzles accommodated there will also be limited.

Patent Document 1 discloses an electronic component mounting machine in which a nozzle station having a multifaceted housing surface is configured to be rotatable and a desired suction nozzle is indexed to an exchange position. However, when targeting relatively large nozzles, there is a limit to the number of suction nozzles that can be accommodated even in such a conventional example, and if the number is increased, the electronic component mounting machine itself becomes larger. End up. On the other hand, if a conventional electronic component mounting machine is used as it is, if a large number of suction nozzles need to be used, the number of electronic component mounting machines must be increased.

Therefore, an object of the present invention is to provide a component mounting machine including a suction nozzle capable of adjusting a suction port corresponding to a plurality of components in order to solve such a problem.

A component mounting machine according to an aspect of the present invention is taken out from the component supply device by a transport device that transports a substrate to a predetermined position, a component supply device that accommodates a plurality of components, and a mounting head that can hold the components by suction. A component mounting device for mounting the component on the substrate transported by the transport device, and a control device for controlling the devices, wherein the mounting head has a diameter or shape of the suction port that contacts the component. A suction nozzle having a variable mechanism to be changed and an operation mechanism for operating the variable mechanism of the suction nozzle are provided.

According to the present invention, the suction nozzle of the mounting head is provided with a variable mechanism that changes the diameter and shape of the suction port that comes into contact with the component, and the variable mechanism is operated by the operating mechanism of the mounting head. The shape can be changed according to the part. For this reason, it is possible to handle the suction holding of various components that has been performed by a plurality of suction nozzles with a single suction nozzle.

It is the external appearance perspective view which made the part which showed the electronic component mounting machine seen through. It is the figure which showed the internal structure of the mounting head. It is sectional drawing which showed the suction nozzle of a variable diameter. FIG. 4 is an AA arrow view of FIG. 3 showing a suction nozzle with a variable aperture. FIG. 5 is a view taken along the line BB in FIG. 3 showing a suction nozzle with a variable diameter. It is sectional drawing which showed the state which the aperture diameter of a suction nozzle changes in steps. It is the block diagram which showed the outline of the control apparatus. It is sectional drawing of 2nd Embodiment which showed the suction nozzle of a variable diameter. It is the figure which showed 3rd Embodiment of the suction nozzle of variable mouth shape in the same position as FIG. It is sectional drawing of 4th Embodiment which showed the suction nozzle of a mouth shape variable. It is sectional drawing of 5th Embodiment which showed the suction nozzle of a variable diameter.

Next, an embodiment of the present invention will be described below with reference to the drawings. In the present embodiment, an electronic component mounting machine that mounts electronic components on a circuit board will be described as an example. FIG. 1 is an external perspective view showing a part of the electronic component mounting machine as seen through. What is shown here is that a plurality of electronic component mounting machines 1 are arranged in the width direction, circuit boards are conveyed in order inside each electronic component mounting machine 1, and predetermined electronic components are mounted in each of them. . Although FIG. 1 shows a configuration in which two electronic component mounting machines 1 are installed on the base 100, the number of electronic component mounting machines 1 can be freely changed depending on the manufacturing contents.

The electronic component mounting machine 1 has a narrow width, and a plurality of electronic component mounting machines 1 are arranged in the width direction so that the entire system is compactly configured. The electronic component mounting machine 1 has a large opening on the side surface in the width direction, and the circuit board is transferred to and from the adjacent electronic component mounting machine 1 through the opening. In the direction shown in the following description, as shown in FIG. 1, the width direction of the electronic component mounting machine 1, which is the direction in which the circuit board is conveyed, is defined as the X-axis direction, and the electronic component mounting machine 1 orthogonal thereto. Is the Y-axis direction, and the height direction of the electronic component mounting machine 1 is the Z-axis direction.

The electronic component mounting machine 1 has a substrate transfer device 2 that transfers a circuit board to the center when the machine body is viewed in the Y-axis direction, which is the longitudinal direction, and the front side (electronic component mounting machine 1 shown in the drawing). The component supply device 3 is configured to supply an electronic component to a position on the front side. In addition, a mounting head 15 for performing the mounting operation of the electronic component is disposed on the rear side of the machine body opposite to the installation position of the component supply device 3. The mounting head 15 is moved and taken out from the component supply device 3. A component mounting device 4 for mounting electronic components onto a circuit board on the substrate transfer device 2 is configured.

In the electronic component mounting machine 1, the substrate transport device 2, the component supply device 3, the component mounting device 4, and the like are assembled on the mounting machine main body 101, and a main body cover 102 that covers them is formed integrally with the mounting machine main body 101. . The substrate transfer device 2, the component supply device 3, the component mounting device 4, and the like are configured as follows.

First, in the substrate transport apparatus 2, two

transport units

201 and 202 having the same configuration are arranged side by side, and transport of a circuit board and mounting of electronic components on the circuit board are performed at two locations. A pair of guides are installed in parallel in the

transport units

201 and 202 in accordance with the width dimension of the circuit board, and a conveyor for moving in the X-axis direction along the guides is provided. The conveyor is provided with belts that support both ends of the circuit board in the Y-axis direction from below, and the belts that are hung on a plurality of pulleys are rotated by a drive motor. In addition, the substrate transport apparatus 2 is provided with a clamp mechanism in each of the

transport units

201 and 202 in order to position the transported circuit board.

The component supply device 3 has a plurality of tape feeders 11 mounted on the front portion of the mounting machine main body 101. In the electronic component mounting machine 1, an opening is formed in the front portion of the main body cover 102, and a device table 12 is installed in the opening as a support table that allows a device such as the tape feeder 11 to be attached and detached. A plurality of tape feeders 11 are mounted on the device table 12. The tape feeder 11 holds a reel 13 on which a tape containing electronic components is wound, and the tape is unwound from the reel 13 by a feeding mechanism. The tape is unwound so that the electronic components are sent out in the Y-axis direction one pitch at a time, and the electronic components are supplied one by one to the component supply position in the machine.

The electronic component supplied by the component supply device 3 is taken out by the component mounting device 4 and mounted on the circuit board. The component mounting apparatus 4 has a movable mounting head 15, and the mounting head 15 is provided with a suction nozzle capable of sucking and holding electronic components. The mounting head 15 is movable in the X-axis direction and the Y-axis direction, and the suction nozzle is configured to move up and down by a lifting mechanism provided in the mounting head 15 in the Z-axis direction. The mounting head 15 incorporates a rotation mechanism in addition to the lifting mechanism, and the suction nozzle is configured to be able to move up and down with respect to the mounting head 15.

In the Y-axis moving mechanism that moves the mounting head 15 in the Y-axis direction, two Y-axis rails 16 are fixed in parallel along the Y-axis direction on the ceiling side of the main body cover 102, and the Y-axis rail 16 A Y-axis slider 17 is slidably attached. A nut 18 is fixed to the Y-axis slider 17, and a screw shaft 20 connected to the Y-axis servomotor 19 is threaded through the nut 18. An X-axis rail 21 is formed on the Y-axis slider 17, and an X-axis slider 22 is slidably attached to the X-axis rail 21. The mounting head 15 is mounted on the X-axis slider 22. Then, a screw shaft 23 is connected to an X-axis servo motor mounted on the Y-axis slider 17, and the screw shaft is screwed into a nut 24 fixed to the X-axis slider 22 (see FIG. 2).

The mounting head 15 is provided with a mark camera 66 (see FIG. 7) for imaging the circuit board transported to the work position. The mark camera 66 images the circuit board from above, and the type and stop position of the circuit board can be confirmed from the image data. Further, a parts camera 25 is provided between the substrate transfer device 2 and the component supply device 3. The parts camera 25 captures an electronic component held by the suction nozzle from below, and the image data can be used to confirm damage of the electronic component, a holding position error of the electronic component held by the suction nozzle, and the like. It has become.

In addition to the parts camera 25, a nozzle station 26 that houses a plurality of suction nozzles is provided between the substrate transfer device 2 and the component supply device 3. The nozzle station 26 is a place where the suction nozzle is replaced with respect to the mounting head 15, and in particular, in this embodiment, the nozzle station 26 is also a place where the diameter of the suction nozzle is adjusted. In other words, the nozzle station 26 accommodates suction nozzles that can be changed to different calibers, and the suction nozzles are replaced when the suction nozzles are replaced or the suction nozzles are mounted on the mounting head 15. The nozzle diameter is adjusted at the nozzle station 26.

Subsequently, the structure of the mounting head 15 will be described in detail. FIG. 2 is a diagram showing the internal structure of the mounting head 15. The mounting head 15 is attached to the X-axis slider 22 so that the Z-axis slider 31 can be raised and lowered via a guide rail (not shown). The Z-axis slider 31 can be moved up and down by a ball screw mechanism. Therefore, the screw shaft 32 is rotatably supported on the X-axis slider 22 by bearings arranged vertically. A pulley 33 is fixed to the upper end portion of the screw shaft 32, and a rotating belt 34 for transmitting the rotation from the elevating motor 63 (see FIG. 7) is hung thereon. The screw shaft 32 is screwed with an elevating nut 35 fixed to the Z-axis slider 31 side and restricted in rotation.

Therefore, as the screw shaft 32 rotates, the elevating nut 35 and the Z-axis slider 31 move in the vertical direction along the axis. A servo motor is used as the elevating motor 63, and the height of the Z-axis slider 31 can be adjusted by controlling the rotation angle. A hollow spline shaft 37 whose upper side is rotatably supported by a bearing is attached to the Z-axis slider 31 so as to extend downward. A non-rotating middle tube 38 is inserted into the hollow spline shaft 37, and its upper end is fixed to the Z-axis slider 31. Therefore, the spline shaft 37 and the middle tube 38 constitute an inner flow path 36a at the center and an outer flow path 36b at the outer periphery.

The spline shaft 37 is disposed so as to penetrate the cylindrical rotating body 39. The rotating body 39 is integrally formed with a gear portion 395 on the lower end side, and the gear portion 395 meshes with the gear 42 fixed to the rotating shaft of the rotating motor 41. The rotating body 39 is a boss member in which a key groove 391 is formed along the axial direction (Z-axis direction) on the inner peripheral surface, and a key protrusion that fits in the key groove 391 is inserted into the spline shaft 37 penetrating therethrough. 371 is formed. Therefore, the spline shaft 37 and the rotating body 39 are relatively movable in the axial direction, and are configured to be able to transmit torque by being rotated in the rotational direction. A servo motor is also used for the rotation motor 41, and the rotation angle of the spline shaft 37 can be adjusted by controlling the rotation angle.

The X-axis slider 22 has a support portion 43 extending horizontally below the Z-axis slider 31. A lower end side of the screw shaft 32 is rotatably supported with respect to the support portion 43, a rotating body 39 is rotatably attached, and a rotation motor 41 is fixed. In FIG. 2, the Z-axis slider 31 is shown in a raised state. However, when the Z-axis slider 31 is lowered, the spline shaft 37 and the intermediate tube 38 further protrude below the support portion 43. A nozzle holder 45 for holding the suction nozzle 50 is fixed to the lower end portion of the spline shaft 37. The nozzle holder 45 forms a closed space 451 between the upper end surface of the suction nozzle 50, and sucks and holds the suction nozzle 50 by evacuation performed through the outer passage 36b.

A flow path 453 is formed in the nozzle holder 45, and the closed space 451 and the outer passage 36b communicate with each other. A vacuum pump 49 is connected to the outer passage 36b via an on-off valve 47. On the other hand, the inner flow path 36 a communicates with the nozzle hole of the suction nozzle 50 attached to the nozzle holder 45. The inner flow path 36a is connected to a compressor 48 and a vacuum pump 49 via a switching valve 46, and switching of the switching valve 46 enables switching between a positive pressure state and a negative pressure state and release to the atmosphere. ing. Under the control of each fluid device, the suction nozzle 50 is mounted on the mounting head 15, and the suction nozzle 50 can hold and release electronic components by suction.

By the way, as described above, a plurality of replaceable suction nozzles 50 are accommodated in the nozzle station 26 shown in FIG. 1 and replaced according to the electronic components to be handled. However, the space of the nozzle station 26 is limited, and the number of suction nozzles that can be mounted is also limited. Therefore, in the present embodiment, the variable-diameter suction nozzle 50 is employed so that one can serve as a plurality of suction nozzles. FIG. 3 is a cross-sectional view showing a suction nozzle 50 having a variable diameter. 4 is a view taken along the line AA in FIG. 3 showing the suction nozzle 50, and FIG. 5 is a view taken along the line BB in FIG.

The suction nozzle 50 of this embodiment is configured by a variable mechanism for changing the diameter of the suction port 531. The variable mechanism is connected to the spline shaft 37 and operates in response to rotation from the spline shaft 37. Therefore, the structure for outputting and transmitting the rotation, that is, the rotation motor 41, the gear 42, the rotating body 39, and the spline shaft 37 of the mounting head 15 shown in FIG. 2 correspond to an operation mechanism for operating the variable mechanism. However, this operating mechanism is not only a variable suction port 531 of the suction nozzle 50 but also a rotation mechanism that rotates the suction nozzle 50 itself in order to adjust the posture of the electronic component held by suction.

The suction nozzle 50 receives the rotation of the spline shaft 37 to displace the support member 52, the support member 52 that supports the cover member 53 from the inside, and the support member 52 to cover the tip of the nozzle. A cover member 53 and an engaging member 54 for associating the

members

51, 52, and 53 are provided, and a variable mechanism for changing the diameter of the suction port 531 is configured by these members.

The displacement member 51 has a flange portion 511 for forming a closed space 451 with the nozzle holder 45, a male screw portion 512 and a taper portion 513 are integrally formed under the flange portion 511, and a connecting portion is provided above. 514 is formed. As shown in FIG. 5, the connecting portion 514 is a cylindrical protrusion, and a key groove 515 is formed at two locations on the circumference, and a key protrusion 375 formed at the lower end of the spline shaft 37 is fitted. It is like that. Accordingly, the rotation of the spline shaft 37 is transmitted to the displacement member 51 through the key groove 515 and the key protrusion 375. In addition, a nozzle hole 516 that penetrates the displacement member 51 in the axial direction is formed inside the connecting portion 514. Accordingly, when the distal end portion of the intermediate tube 38 enters the connecting portion 514, the nozzle hole 516 is connected to the compressor 48 and the vacuum pump 49 via the intermediate tube 38.

The displacement member 51 has a male screw portion 512 screwed into a female screw portion 541 of the engaging member 54. The engaging member 54 has a hexagonal flange portion 542 shown in FIG. 4, and a female screw portion 541 is formed on the upper portion. On the other hand, the nozzle station 26 shown in FIG. 1 is formed with the same hexagonal concave accommodating portion, and the suction nozzle 50 is accommodated so that the flange portion 542 is fitted therein. Therefore, even if rotation is given to the displacement member 51 in the accommodated state, the follow-up of the engaging member 54 is restricted, and the male screw portion 512 rotates with respect to the stationary female screw portion 541. Accordingly, the displacement member 51 given the rotation moves upward or downward. The flange portion 542 is not limited to a hexagon, and may be any shape such as a quadrangle, a pentagon, or an ellipse that the engagement member 54 does not rotate with the rotation of the displacement member 51.

As the displacement member 51 moves up and down, the support member 52 that contacts the tapered portion 513 moves in the radial direction. As shown in FIG. 4, the support member 52 is provided at four locations, and each is attached to the engagement member 54 so as to be slidable in the radial direction. The engaging member 54 has a middle plate 542a fixed to the lower surface of the flange portion 542, and a guide groove 543 is formed in the middle plate 542a in the radial direction. In the support member 52, the slide plate 521 is slidably fitted in the guide groove 543. A radial plate 522 along the radial direction is fixed to the lower surface of the slide plate 521, and a circumferential plate 523 that is curved with respect to the radial plate 522 is fixed. In the middle plate 542a, a slit 544 for moving the radial plate 522 is formed in the guide groove 543.

The radial plate 522 has a tapered surface 522a formed on the inner upper end surface in the radial direction, and the tapered portion 513 of the displacement member 51 is applied to the tapered surface 522a. A cover member 53 constituting the nozzle tip is attached to the support member 52. The cover member 53 has a substantially cylindrical shape so as to be put on the four circumferential plates 523. The suction port 531 is formed on the lower end side, the upper end side spreads outward, and the fixing portion 532 is formed on the distal end portion. Is formed. The fixing portion 532 is fixed so as to be sandwiched between the middle plate 542a and the lower plate 542b of the flange portion 542.

The cover member 53 is formed of an elastic rubber material. Therefore, the support member 52 is always urged so as to be pressed against the tapered portion 513. Therefore, when the displacement member 51 moves in the vertical direction, the support member 52 follows and moves in the radial direction. Then, the cylindrical portion 533 and the suction port 531 of the cover member 53 expand or contract in the radial direction by the movement of the support member 52.

In the suction nozzle 50, electronic parts are pressed against the suction port 531, and the space in the cover member 53 becomes negative pressure by evacuation, so that the electronic parts can be sucked and held. Adjustment of the diameter of the suction port 531 is determined by the relative positional relationship between the male screw portion 512 and the female screw portion 541. That is, in the state of FIG. 6A in which the male screw portion 512 is raised, the diameter of the suction port 531 is as small as D1, and as the male screw portion 512 is lowered, the suction is performed as shown in FIGS. 6B to 6C. The diameter of the mouth 531 increases as D2 and D3.

The relative positional relationship between the male screw part 512 and the female screw part 541 is uniquely determined by the frictional resistance between them. The relationship can be replaced with the relationship between the displacement member 51 and the

flange portions

511 and 542 of the engagement member 54. Therefore, in the present embodiment, as shown in FIG. 5, a plurality of identification members 55 such as a two-dimensional code are displayed on the flange portion 542 of the engaging member 54 at regular intervals in the circumferential direction. And the notch 511a is formed in the flange part 511 of the displacement member 51 so that the identification member 55 can be confirmed from upper direction. In each identification member 55, information (here, the diameter) of the suction port 531 corresponding to the display position is written, and the identification member 55 is detected by the nozzle camera 65 (see FIG. 7) provided in the mounting head 15. Can be read.

In the electronic component mounting machine 1 of the present embodiment, a plurality of suction nozzles 50 as described above are accommodated in the nozzle station 26. For example, six suction nozzles 50 can be accommodated in the nozzle station 26, and each suction nozzle 50 can change the diameter of the suction port 531 in five stages. Accordingly, if the six suction nozzles 50 are designed so that their variable diameters are all different sizes, this corresponds to 30 conventional suction nozzles.

Next, the electronic component mounting machine 1 is provided with a control device for controlling the drive of each device. FIG. 7 is a block diagram showing an outline of the control device. The control device 5 includes a controller 61 mainly composed of a computer provided with a storage device such as a ROM, a RAM, and a nonvolatile memory in addition to the CPU, and constitutes the substrate transfer device 2, the component supply device 3, and the component mounting device 4. Each drive circuit 62 for driving drive means such as a servo motor is provided. The controller 61 is connected to the drive means of each device via a drive circuit 62.

In the controller 61, various data processing is performed by the CPU, and a system program is stored in a ROM which is a storage device. When the system program is read by the CPU, control management is performed for the entire drive unit of the electronic component mounting machine 1. The RAM temporarily stores calculation data and display data. The nonvolatile memory, which is the same storage device, has a component mounting program and various parameters for creating an electronic circuit board to be produced. Is stored. In particular, in the present embodiment, a program for adjusting the aperture of the suction nozzle 50 and suction nozzle information related to the identification member 55 of each suction nozzle 50 are stored.

Further, as shown in FIG. 1, the display device 6 is provided on the main body cover 101 at the front part of the electronic component mounting machine 1 and is connected to the controller 41. The display device 6 includes a display unit having a liquid crystal display unit and a touch panel type or button type input unit, and displays work information, an operation screen, and various types of information such as a diameter adjustment program and suction nozzle information by an operator. Information input is possible.

Subsequently, the operation of the electronic component mounting machine 1 of the present embodiment will be described. The circuit board placed in the electronic component mounting machine 1 is transported to the work position by the substrate transport device 2 and positioned. Then, the mounting head 15 is moved to a predetermined position by driving the Y-axis moving mechanism and the X-axis moving mechanism, and the suction nozzle 50 is moved up and down by the lifting mechanism, whereby the electronic component is taken out from the component supply device 3, and the circuit Mounting to the substrate is performed. At that time, the circuit board is imaged by the mark camera 66 attached to the mounting head 41, and the type and stop position of the circuit board are confirmed from the imaging data. At this time, if the stop position of the circuit board deviates from the planned position, a correction process for calculating the error is performed, and the electronic component is mounted at an appropriate position on the circuit board.

¡When mounting electronic components, the types of electronic components differ depending on the target circuit board. Therefore, in the component supply device 3, the tape feeder 11 that accommodates a corresponding electronic component from among a plurality of components is driven and controlled to supply the electronic component. And in the component mounting apparatus 4, selection of the suction nozzle 50 and a diameter adjustment are performed according to the kind of electronic component mounted. In the conventional electronic component mounting machines, it has been essential to replace electronic components of different sizes with different suction nozzles. However, in this embodiment, even in such a case, it is possible to cope without replacing the suction nozzle 50. However, if the adjustment of the diameter of the suction nozzle 50 mounted on the mounting head 15 is not possible, replacement with another suction nozzle 50 accommodated in the nozzle station 26 is performed.

The current aperture of the suction nozzle 50 can be confirmed by reading the information by imaging the identification member 55 with the nozzle camera 65. Therefore, when it is determined that the diameter needs to be changed based on the information, the mounting head 15 is temporarily returned to the nozzle station 26, and the flange portion 542 of the suction nozzle 50 is fitted into the hexagonal concave accommodating portion. It is. Thus, the displacement member 51 is rotated in a state where the rotation of the engaging portion 54 is restricted. That is, the rotation output of the rotation motor 41 is transmitted to the rotating body 39, the spline shaft 37 rotates, and the displacement member 51 is rotated through the spline shaft 37.

The rotation direction and the rotation angle are calculated by the control device 5 depending on how much the rotation given to the displacement member 51 is changed from the current aperture. As the displacement member 51 rotates, the displacement member 51 moves upward or downward by a predetermined amount with respect to the engagement member 54. At that time, the elevating motor 63 is driven and controlled to move the spline shaft 37 and the middle tube 38 following the vertical movement, and the elevating of the Z-axis slider 31 accompanying the rotation of the screw shaft 32 is adjusted. When the support member 52 moves in the radial direction by the vertical movement of the taper portion 513, the cover member 53 expands and contracts, the diameter of the suction port 531 changes, and the diameter adjustment corresponding to the electronic component is performed.

The suction nozzle 50 is sucked and held by the nozzle holder 45 with the closed space 451 having a negative pressure, and is detached from the nozzle station 26 when the mounting head 15 is lifted. At this time, the relative positional relationship between the male screw portion 512 and the female screw portion 541 does not change due to the frictional resistance between them. Therefore, the diameter of the suction nozzle 50 is kept constant until the next change. If the spline shaft 37 rotates or moves up and down, the suction nozzle 50 rotates and moves up and down in the same manner while keeping the diameter constant. In the suction nozzle 50 whose diameter has been adjusted, the electronic component is pressed against the suction port 531, and the space in the cover member 53 becomes negative by vacuuming, so that the electronic component is sucked and held. The electronic component is taken out from the component supply device 3 and sent to the circuit board for mounting. At that time, the space in the cover member 53 is switched to positive pressure and released.

As described above, according to the electronic component mounting machine 1 of the present embodiment, the suction holding of various components, which has been performed by a plurality of suction nozzles so far, can be handled by one suction nozzle 50. Therefore, even if the nozzle station 26 does not have such a large space in the machine, by accommodating several different suction nozzles 50, it is the same as having accommodated several times as many suction nozzles as in the conventional case although it is the same space. An effect can be obtained. Therefore, even if the number of electronic component mounting machines has to be increased in order to use different suction nozzles in the prior art, it is possible to use only one electronic component mounting machine 1. That is, the production line including the electronic component mounting machine 1 can be made compact, which contributes to cost reduction.

Further, in the electronic component mounting machine 1 according to the present embodiment, the diameter of the suction nozzle 50 can be adjusted by using the configuration that is conventionally provided in the mounting head 15, that is, the configuration for rotating the spline shaft 37. Therefore, it is easy to carry out to achieve the above-mentioned effect at a low cost, since it can be implemented with a slight improvement over the conventional electronic component mounting machine 1 without requiring a significant design change. Implementation is possible. And since the diameter of the adjusted suction port 531 can be kept constant by the variable mechanism of the suction nozzle 50, it is possible to accurately control fine adjustment of the suction port 531.

Incidentally, the adjustment of the diameter of the suction nozzle 50 is performed by converting the vertical movement of the displacement member 51 into the radial movement of the support member 52. Therefore, the rotational movement of the displacement member 51 is not directly related to the displacement of the support member 52, but rather a force acts in a direction other than the radial direction, which hinders the movement of the support member 52. Therefore, for example, it is preferable that the taper surface 522a of the radial plate 522 is curved to reduce the sliding resistance in the rotation direction between the radial plate 522 and the taper portion 513. Furthermore, as shown in FIG. 8, the support member 51 may be structured such that no rotational motion acts. FIG. 8 is a cross-sectional view of the second embodiment showing a variable-diameter suction nozzle. The same components as those of the suction nozzle 50 of the first embodiment will be described with the same reference numerals.

The suction nozzle 56 is an improvement of the displacement member 51 of the suction nozzle 50. That is, the displacement member 71 includes a flange portion 711, a male screw portion 712, a taper portion 713, and a connecting portion 714. However, the taper portion 713 is separated from the male screw portion 712, and the radial bearing 717 is provided. It is connected through. Therefore, even if the displacement member 71 moves in the vertical direction while rotating, the tapered portion 713 simply moves in the vertical direction without rotating due to the frictional resistance with the support member 52. Therefore, the radial movement of the support member 52 is smooth, and the aperture adjustment itself is smoothly performed.

Next, in the

suction nozzles

50 and 56 of the first and second embodiments, the suction port 531 is circular. However, a suction port other than circular may be required depending on the electronic component. Therefore, the thing which changes the magnitude | size of the suction port other than circular, and the thing which made it possible to change the shape of a suction port variously are proposed. FIG. 9 is a view of the third embodiment showing the suction nozzle of the elliptical suction port, and is shown at the same position as FIG. In addition, the same code | symbol is attached | subjected and demonstrated about the same structure as the

suction nozzles

50 and 56 of the said 1st, 2nd embodiment.

This suction nozzle 57 is also an improvement of the displacement member 51 of the suction nozzle 50. That is, although not shown in detail, the displacement member 72 includes the flange portion 511, the male screw portion 512, and the connecting portion 514 of the first embodiment shown in FIG. 3, and the taper portion 723 is a separate member and the male screw portion 512. And is connected via a radial bearing 717 as in the second embodiment shown in FIG. The tapered portion 723 has an elliptical cross-sectional shape in the axial direction (through the drawing) as shown in FIG. Therefore, for example, when the displacement member 72 is lowered stepwise as in the displacement member 51 shown in FIGS. 6A to 6C, the movement amounts of the

support members

52b and 52d are larger than those of the

support members

52a and 52c. Therefore, the suction port gradually changes from a substantially circular shape to an oval shape in which the difference between the short diameter and the long diameter gradually increases.

Thus, the suction nozzle 57 of this embodiment is used for an electronic component that requires an oval suction port instead of a circle. In addition, in the first embodiment, the suction port 531 is circular by the circumferential plate 523. However, if a flat plate bent in the circumferential direction is used instead of the curved circumferential plate 523, the suction port is rectangular. Can be. And about this point, if it is set as the board | plate material which changed the bending angle with the supporting

members

52a and 52c and the supporting

members

52b and 52d also in this embodiment, an adsorption port can be made into a rhombus.

On the other hand, in the third embodiment shown in FIG. 9, the taper portion 723 has been described as non-rotating, but the configuration in which the taper portion 723 rotates as in the first embodiment, that is, the displacement member 72 is configured as one member. It may be. In this case, the major axis and the minor axis of the elliptical tapered portion 723 rotate, the radial movement of the

support members

52a, 52b, 52c, and 52d becomes more complicated, and the suction port 531 can be formed in various shapes. Can be changed. If no change in size is required at this time, an elliptical member having the same cross section in the axial direction may be used instead of the inclined surface like the tapered portion 723.

Furthermore, as shown in FIG. 10, the shape of the suction port may be changed. FIG. 10 is a cross-sectional view of the fourth embodiment showing the suction nozzle. The same components as those of the suction nozzle 50 of the first embodiment will be described with the same reference numerals. The suction nozzle 58 is an improvement of the displacement member 51 of the suction nozzle 50. That is, in the displacement member 74, the shape of the tapered portion 743 is asymmetric with respect to the rotation axis O. The tapered portion 743 is a non-circular cross section having different distances from the rotation axis O when the surface (tapered surface) is viewed at the same height at various locations in the circumferential direction.

Therefore, when the displacement member 74 moves in the vertical direction while rotating, the four support members 52 (see the

support members

52a, 52b, 52c, and 52d shown in FIG. 9) that contact the surface of the tapered portion 743 are separated from the rotation axis O. Are different from each other, and the shape of the suction port 531 changes variously. At that time, if the shape of the circumferential plate 523 of the support member 52 is changed, the shape of the suction port 531 can be further changed. In each of the embodiments including the present embodiment, the diameter size and shape of the changing suction port 531 are written in each identification member 55 displayed on the flange portion 541 of the engagement member 54. Accordingly, by imaging the identification member 55 with the nozzle camera 65, information can be read and confirmed, and control relating to adjustment of an appropriate aperture (or aperture) is possible.

In the

suction nozzles

50, 56, 57, and 58 shown in the above embodiments, any of the variable mechanisms converts the axial movement into the radial movement. However, the variable mechanism may have a structure as shown in FIG. FIG. 11 is a cross-sectional view of a fifth embodiment showing a suction nozzle with a variable aperture. In addition, the same code | symbol is attached | subjected and demonstrated about the same structure as the suction nozzle 50 of the said 1st Embodiment.

The suction nozzle 80 is placed on a displacement member 81 that receives the rotation of the spline shaft 37 shown in FIG. 1 to displace the support member 82, a support member 82 that supports the cover member 83 from the inside, and the support member 82. A cover member 83 that forms the nozzle tip portion and an engagement member 84 that associates these

members

81, 82, 83, and the like are provided, and a variable mechanism that changes the diameter of the suction port 831 is configured by these members.

The displacement member 81 has a male screw portion 812 formed below the flange portion 811, and an egg-shaped block guide portion 813 formed integrally at the lower end thereof. A connecting portion 814 is formed above, and a nozzle hole 816 penetrates in the axial direction at the center. The male screw portion 812 is screwed into the female screw portion 841 of the engaging member 84, and the guide portion 813 is located below. When compared with the displacement member 51 of the first embodiment, the configuration is the same except for the guide portion 813. And the support member 82 and the cover member 83 are provided so that the guide part 813 may be wrapped.

The support member 82 includes a plurality of swing plates 821 that are curved so as to bulge outward. The swing plate 821 has an upper end supported on the lower surface side of the flange portion 842 so as to be swingable by a shaft 822 whose axis is perpendicular to the radial direction. The plurality of oscillating plates 821 are arranged so as to partially overlap in the circumferential direction, and are shaped like a narrowed petal. A cover member 83 made of a stretchable rubber material or the like is attached to the support member 82. The cover member 83 has a substantially cylindrical shape, and is covered so as to cover the plurality of swing plates 821.

The cover member 83 has a suction port 831 formed at the lower end, and the upper end side is fixed to the flange portion 842 of the engaging portion 84. The swing plate 821 is urged inward by the cover member 83 and is always pressed against the guide portion 813. Therefore, when the guide portion 813 moves up and down, the curved swing plate 821 swings and the size of the suction port 831 changes. A plurality of identification members 55 shown in FIG. 5 are displayed on the flange portion 842 of the engaging member 84 at regular intervals in the circumferential direction, and the rotation of the displacement member 81 and the size of the suction port 831 are associated with each other.

Therefore, also in this embodiment, the suction holding of various parts, which has been performed by a plurality of suction nozzles so far, can be handled by one suction nozzle 80. And since the diameter of the suction port 831 adjusted by the variable mechanism of the suction nozzle 80 can be kept constant, accurate control can be performed for fine adjustment of the suction port 831.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to these, A various change is possible in the range which does not deviate from the meaning.
In the above embodiment, the single nozzle mounting head 15 on which one suction nozzle is mounted is shown, but a multi-nozzle mounting head on which a plurality of suction nozzles can be mounted may be used.
Moreover, in the said embodiment, although the mechanism which rotates the spline shaft 37 was mentioned as an example and demonstrated as an operation mechanism, for example, it is set as an operation mechanism including the mechanism which raises / lowers the spline shaft 37, and it respond | corresponds to the output. The variable mechanism on the suction nozzle side may be configured by a mechanism different from the above embodiment.
In the fifth embodiment, the suction port 831 is described as a circular shape. However, for example, a square suction port may be formed by arranging the swing plate in a flat plate.
Further, the diameter and shape of the suction port 531 and the like are confirmed by the identification member 55. However, the suction port 531 is imaged and confirmed by the parts camera 25, and the diameter adjustment is controlled based on the image. Good.

DESCRIPTION OF SYMBOLS 1 ... Electronic component mounting machine 2 ... Board | substrate conveyance apparatus 3 ... Component supply apparatus 4 ... Component mounting apparatus 5 ... Control apparatus 6 ... Display apparatus 15 ... Mounting head 37 ... Spline shaft 39 ... Rotating body 41 ... Motor for rotation 42 ... Gear 50 ... Adsorption nozzle 51 ... Displacement member 52 ... Support member 53 ... Cover member 54 ... Engagement member

Claims

A transport device that transports the substrate to a predetermined position, a component supply device that accommodates a plurality of components, and the component that has been taken out from the component supply device by a mounting head that can hold the component by suction is transported by the transport device. A component mounting device to be mounted on the board, and a control device for controlling the devices
The mounting head includes a suction nozzle having a variable mechanism that changes a diameter or a shape of a suction port that contacts the component, and an operation mechanism that operates the variable mechanism of the suction nozzle. Component mounting machine.
The suction nozzle has a nozzle tip formed by a stretchable cover member,
The variable mechanism includes the cover member, a support member that supports the cover member from the inside, and a displacement member that displaces the support member by rotation output from the operation mechanism. The component mounting machine according to claim 1.
The suction nozzle has a cylindrical shape of the cover member,
The support member includes a support portion that supports the inner surface of the cover member at a plurality of locations in the circumferential direction, and a slide portion that is slidable in the radial direction,
The component mounting machine according to claim 2, wherein the displacement member includes a screw portion that converts rotation into axial movement and a taper portion that is in sliding contact with the slide member.
4. The component mounting device according to claim 3, wherein the screw member and the taper portion are separate members in the displacement member, and both members are connected via a rolling bearing.
The taper portion of the displacement member is a non-circular cross section in which the distance from the rotation axis of the screw portion to the taper surface seen at the circumferential position of the same height is different at each location. The component mounting apparatus according to claim 4.
The suction nozzle has a cylindrical shape of the cover member,
The support member is a plurality of plate members arranged in the inner circumferential direction of the cover member, and the upper end portion of each plate member is supported so as to be swingable about the direction orthogonal to the radial direction of the cover member as an axis, Curved so as to bulge toward the outside of the cover member from the upper end to the lower end,
3. The displacement member according to claim 2, wherein the displacement member includes a screw portion that converts rotation into axial movement, and a guide portion that is applied to the inside of the plate member and guides its swinging. The component mounting machine described.
The suction nozzle includes a rotation position of the displacement member that is rotated by an output from the operation mechanism, and an identification member that indicates a diameter and a shape of the suction port that changes corresponding to the rotation position.
The component mounting machine according to any one of claims 2 to 6, wherein the control device controls the operation mechanism based on information from a reading unit that reads the diameter identification member.