JP6487060B2 - Component holder and component mounting apparatus - Google Patents

Description

  The present invention relates to a component holder and a component mounting apparatus applied to a component mounting head.

  A component mounting head mounted on a component mounting apparatus includes a shaft-shaped head body that is driven up and down and rotated by a motor or the like, and a nozzle member that is detachably mounted on the head body. Generally, a component is adsorbed by supplying a negative pressure to the tip of the nozzle member through the inside of the main body.

  However, in today's diversified mounting parts, a sufficient suction area by the nozzle member cannot be secured, and there are many parts that are difficult to be stably adsorbed. For this type of component, it is conceivable to use a head that adsorbs the component with a magnetic force, as described in Patent Document 1, for example. This head has a pair of attracting portions extending in the vertical direction and an inverted U-shaped head body formed entirely of a magnetic material, a permanent magnet interposed between the pair of attracting portions, and the permanent A drive rod connected to the magnet to move the permanent magnet up and down relative to the head body. In other words, at the time of component adsorption, a permanent magnet is arranged near the lower end surface (adsorption surface) of each adsorption part, thereby increasing the magnetic strength generated between both adsorption surfaces and adsorbing the component, and the component on the substrate At the time of mounting, the permanent magnet is pulled upward from the attracting surface, thereby reducing the magnetic strength generated between the attracting surfaces, thereby releasing the attracted state of the component.

  According to the head described in Patent Document 1, even if it is difficult to absorb negative pressure as described above, it is possible to stably absorb the component by using magnetic force.

  However, as described above, the basic structure of such a head is different from that of a normal head that sucks parts under negative pressure. If an attempt is made to provide a sucking head, this results in an increase in the size and cost of the component mounting apparatus. Further, it is difficult to retrofit this head to an existing component mounting apparatus because it requires significant improvements in hardware and software.

JP-A-10-65396

  SUMMARY OF THE INVENTION An object of the present invention is to provide a technology for adsorbing a component by a magnetic force and mounting it on a substrate with a simpler and less expensive configuration in the component mounting apparatus.

  The present invention is a component holder that is mounted on a movable head main body having a first passage to which a predetermined negative pressure or positive pressure is supplied, and constitutes a component mounting head together with the head main body. A holder body provided with a contact surface of the component, a magnet housed in the holder body in a state displaceable in a first direction orthogonal to the contact surface, and the magnet A biasing member that biases in a direction away from the surface, and the negative pressure or the positive pressure that is provided in the holder main body so as to communicate with the first passage and is supplied to the first passage. And a second passage for guiding the magnet to the magnet as an operating pressure against the biasing force of the biasing member.

It is a top view which shows the component mounting apparatus of this invention. It is a front view which shows the said component mounting apparatus. It is a circuit diagram which shows the structure of a pressure supply unit. It is sectional drawing of the head of the state in which the nozzle member was mounted | worn with the head main body. It is sectional drawing of a head and a nozzle member in the state from which the nozzle member was removed from the head main body. It is a perspective view of the component holder of this invention. It is a perspective exploded view of the said component holder. (A) is sectional drawing of the said component holder, (b) is sectional drawing of the said component holder in the position different from (a). It is sectional drawing of the head of the state in which the component holder was mounted | worn with the head main body. (A) is sectional drawing of the said component holder before components adsorption | suction, (b) is sectional drawing of the said component holder at the time of component adsorption | suction, (c) mounted components on the board | substrate. It is sectional drawing of the said component holder at the time.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[Configuration of component mounting equipment]
1 and 2 show a component mounting apparatus 1 according to the present invention, in which FIG. 1 is a plan view and FIG. 2 is a front view, each showing the component mounting apparatus 1. In the drawings, XYZ rectangular coordinate axes are shown in order to clarify the directional relationship between the drawings. The X direction is a direction parallel to the horizontal plane, the Y direction is a direction orthogonal to the X direction on the horizontal plane, and the Z direction is a direction orthogonal to both the X and Y directions. Note that the Z direction is also referred to as a vertical direction as appropriate.

  The component mounting apparatus 1 includes a base 2, a board transport mechanism 3 that transports a substrate P such as a printed wiring board on the base 2, a component supply unit 5, a head unit 6, and the head unit 6. A head unit driving mechanism, a component recognition camera 7, a tool stocker 8, and a controller 9 (shown in FIG. 3) that comprehensively controls the operation of the component mounting apparatus 1.

  The substrate transport mechanism 3 includes a pair of belt conveyors 4 that transport the substrate P in the X direction. The substrate transport mechanism 3 receives the substrate P from the right side (X1 direction side) in FIG. ), And after the mounting operation, the substrate P is unloaded to the left side (X2 direction side) in FIG.

  The component supply unit 5 is disposed on both sides (both sides in the Y direction) of the substrate transport mechanism 3. In each component supply unit 5, a plurality of tape feeders 5 a are arranged along the belt conveyor 4. Each tape feeder 5a supplies small electronic components (chip components) such as ICs, transistors, capacitors, etc., using the tape as a carrier. Further, a tray feeder 5b is further arranged in the component supply unit 5 on the front side (Y2 side) of the apparatus. The tray feeder 5b is supplied with metal parts such as bus bars and mesh plates placed thereon.

  The head unit 6 takes out components from each component supply unit 5 and mounts them on the substrate P, and is provided so as to be movable in the X direction and the Y direction within a certain area by a head unit driving mechanism. Specifically, the head unit drive mechanism includes a pair of fixed rails 10 that are respectively fixed on an elevated frame and extend in the Y direction, and a unit support member 11 that extends in the X direction and is movably supported by the fixed rails 10. And a ball screw shaft 12 screwed into the unit support member 11 and driven by a Y-axis servo motor 13. The head unit drive mechanism is fixed to the unit support member 11 and supports the head unit 6 so as to be movable in the X direction, and the head unit 6 is screwed into the head unit 6 to drive the X-axis servo motor 16 as a drive source. And a ball screw shaft 15 driven as follows. In other words, the head unit driving mechanism drives the head unit 6 in the X direction by the X-axis servomotor 16 via the ball screw shaft 15, and the unit support member 11 via the ball screw shaft 12 by the Y-axis servomotor 13. Is driven in the Y direction. As a result, the head unit 6 moves in the X direction and the Y direction within a certain area.

  The head unit 6 includes a plurality of shaft-shaped heads 20 and a head driving mechanism that drives the heads 20. In this example, the head unit 6 includes a total of five heads 20 arranged in a line in the X direction.

  The head drive mechanism includes an elevating drive mechanism for individually elevating (moving in the Z direction) each head 20 by a Z-axis servo motor 24 provided corresponding to each head 20, and one R common to each head 20. And a rotational drive mechanism that rotates each head 20 around the head central axis (R direction) in synchronization with an axis servo motor (not shown).

  The head 20 is supported by the frame of the head unit 6 so as to be able to rotate and lift, and is driven by the lift drive mechanism and the rotary drive mechanism, and an end (lower end) of the head body 21. The component suction tool 22 is detachably mounted (connected). The component adsorption tool 22 is for adsorbing and holding components, and in this example, there are two types of components, a nozzle member 22A that adsorbs components by negative pressure and a component holder 22B that adsorbs components by magnetic force. The head main body 21 is selectively mounted according to the type of component.

  Each head 20 (head body 21) is connected to a pressure supply unit 26 (corresponding to the pressure supply device of the present invention) shown in FIG. The pressure supply unit 26 supplies negative pressure and positive pressure to the nozzle member 22A when a component is sucked and mounted by the nozzle member 22A, and has the following configuration.

  A pressure supply pipe 28 that supplies negative pressure and positive pressure is connected to the head body 21. As shown in the figure, the pressure supply pipe 28 is branched into first and second branch pipes 29a and 29b. The end of the first branch pipe 29a is connected to an ejector 32 having a silencer 32a, and a negative pressure generating valve 30a such as an electromagnetic valve is interposed in the middle of the first branch pipe 29a. On the other hand, the end of the second branch pipe 29b is connected in the middle of an air supply pipe 35 connecting the compressed air supply source 34 and the ejector 32, and in the middle of the first branch pipe 29a, a positive valve such as an electromagnetic valve is connected. A pressure generating valve 30b and a variable throttle valve 33 are interposed. In the air supply pipe 35, a filter 36 and a check valve 37 are interposed between the connection position of the second branch pipe 29 b and the ejector 32. That is, when the negative pressure generating valve 30a is on (opened) and the positive pressure generating valve 30b is off (closed) (state of FIG. 3), the compressed air generated by the compressed air supply source 34 is introduced into the ejector 32, Due to the ejector effect at that time, the air in the internal passage 21 a in the head body 21 is sucked through the first branch pipe 29 a and the pressure supply pipe 28. That is, the pressure supply unit 26 supplies negative pressure to the head main body 21 (internal passage 21a). On the other hand, when the negative pressure generating valve 30a is off (closed) and the positive pressure generating valve 30b is on (open), the compressed air generated by the compressed air supply source 34 passes through the second branch pipe 29b and the pressure supply pipe 28. It is supplied to the internal passage 21a. That is, the pressure supply unit 26 supplies positive pressure to the head main body 21 (internal passage 21a). The compressed air supply source 34 is common to the pressure supply unit 26 of each head 20.

  The head unit 6 further includes a substrate recognition camera 25. The board recognition camera 25 captures various marks written on the board P for identification of the board P, and the presence / absence and identification of the component suction tool 22 (22A, 22B) stored in the tool stocker 8 described later. Therefore, the various codes attached to the component suction tool 22 are imaged.

  The component recognition camera 7 images the component from the lower side in order to recognize the suction state of the component taken out from the component supply unit 5 by each head 20. As shown in FIG. 1, the component recognition camera 7 is disposed at a position between each component supply unit 5 and the substrate transport mechanism 3 on the base 2.

  The tool stocker 8 is for storing a component suction tool 22 (22A, 22B) to be mounted on the head 20, and as shown in FIG. It is arranged between the mechanism 3. Although not shown in detail, the tool stocker 8 includes a plurality of tool storage holes that open upward, and the component suction tool 22, that is, the nozzle member 22A and the component holder 22B are provided in these tool storage holes. Stored in the inserted state. The tool stocker 8 stores a plurality of nozzle members 22A and component holders 22B having different nozzle shapes, and these are selectively attached to the head 20 as necessary.

  The controller 9 is based on a well-known microcomputer, and has a central processing unit (CPU) that executes a program, a memory constituted by, for example, a RAM or a ROM, and an input / output (input / output) that inputs and outputs electrical signals I / O) bus. And as a function structure relevant to this invention, the controller 9 is provided with the drive control part 42 (equivalent to the control apparatus of this invention) and the memory | storage part 43, as shown in FIG.

  The storage unit 43 is configured by the memory or the hard disk, and stores various programs and data required for controlling the operation of the component mounting apparatus 1. For example, the storage unit 43 stores programs and data necessary for a series of mounting operations such as a component mounting operation by the head 20 and a supply timing of negative pressure and positive pressure to the head 20 at that time.

  The drive control unit 42 controls the movement of the head unit 6 via the X-axis servomotor 13 and the Y-axis servomotor 16, and moves up and down and rotates each head 20 via the Z-axis servomotor 24 and the R-axis servomotor. To control. Further, the drive control unit 42 controls supply of negative pressure and positive pressure to each head 20 via the negative pressure generation valve 30a and the positive pressure generation valve 30b of each pressure supply unit 26. The control by the drive control unit 42 is performed based on the program and data stored in the storage unit 43.

[Detailed structure of head and component suction tool]
First, the head 20 and the nozzle member 22A will be described with reference to FIGS. 4 and 5, and then the configuration of the component holder 22B will be described in detail with reference to FIGS.

  4 is a cross-sectional view of the head 20 with the nozzle member 22A attached to the head main body 21, and FIG. 5 is a cross-sectional view of the head 20 and the nozzle member 22A with the nozzle member 22A removed from the head main body 21. FIG. The description of the nozzle member 22A is based on the state where it is attached to the head main body 21 unless otherwise specified. The same applies to the description of the component holder 22B.

  As shown in FIGS. 4 and 5, the head main body 21 is connected to a cylindrical main shaft portion 50 extending in the vertical direction (Z direction) and movably in the axial direction (vertical direction) with respect to the main shaft portion 50. And a cylindrical tool holder 52 (corresponding to the connecting portion of the present invention). The tool holder 52 is connected to the nozzle member 22A and the like in a detachable manner.

  The tool holder 52 includes a spindle fitting recess 54 at the upper end (end in the Z2 direction) and a tool fitting recess 56 at the lower end, and the lower end of the spindle 50 fits into the spindle fitting recess 54. By doing so, it is connected to the main shaft portion 50. A long hole 58 extending in the vertical direction is formed in the peripheral wall of the main shaft fitting recess 54, and a restriction pin 53 fixed to the main shaft portion 50 is inserted into the long hole 58. With this configuration, the tool holder 52 is prevented from being detached from the main shaft portion 50, and the movable range of the tool holder 52 in the vertical direction with respect to the main shaft portion 50 is restricted. Further, a step portion is formed inside the main shaft portion 50, and the coil spring 60 is interposed between the step portion and the inner bottom portion of the main shaft fitting concave portion 54. The tool holder 52 is biased downward with respect to the main shaft portion 50 by the force. That is, at the time of suction and mounting of the component by the head 20, the nozzle member 22A and the tool holder 52 and the tool holder 52 are elastically retracted (raised) with respect to the main shaft portion 50, so that the cushion function is exhibited. .

  In the tool holder 52, a communication hole 55 that communicates the two fitting recesses 54 and 56 is formed. The inside of the main shaft portion 50 and the inside of the tool holder 52 communicate with each other, and thereby, an internal passage for supplying negative pressure and positive pressure from the pressure supply unit 26 to the nozzle member 22A into the head main body 21. 21a (corresponding to the first passage of the present invention) is formed.

  A locking piece 62 for locking the nozzle member 22 </ b> A is fixed to a portion of the outer peripheral surface of the tool holder 52 corresponding to the tool fitting recess 56. The locking piece 62 includes a strip-shaped plate spring 63 extending in the vertical direction whose upper end is fixed to the tool holder 52, and a columnar locking claw 64 fixed to the tip (lower end) of the plate spring 63. The locking claw 64 is urged toward the center of the tool holder 52 by the elastic force of the leaf spring 63. An opening 56a is formed in the peripheral wall of the tool fitting recess 56, and the locking claw 64 protrudes into the tool fitting recess 56 through the opening 56a.

  On the other hand, as shown in FIG. 5, the nozzle member 22 </ b> A has a component suction part 70 that is a part that sucks parts, a flange 73, and a fitting shaft part 72 that is a part connected to the head body 21. Have a cylindrical structure.

  As shown in FIG. 4, the nozzle member 22 </ b> A has a fitting shaft portion 72 fitted into the tool fitting recess 56 of the tool holder 52, and the fitting shaft portion 72 is locked to the tool holder 52 by a locking piece 62. Thus, the head body 21 is detachably connected.

  More specifically, an engagement recess 72 a is formed on the outer peripheral surface of the fitting shaft portion 72. Then, when the fitting shaft portion 72 is fitted into the tool fitting recess 56, the locking piece 62 is bent and deformed to the outside, and the nozzle member 22A is completely connected to the head body 21 (tool holder 52). That is, as shown in FIG. 4, when the fitting shaft portion 72 is inserted to a position where the end portion of the fitting shaft portion 72 contacts the inner bottom portion of the tool fitting recess 56, the locking piece 62 is The elastic claw 64 returns to engage the engaging claw 64 with the engaging recess 72a. As a result, the nozzle member 22A is locked (held) to the tool holder 52 as shown in FIG. On the other hand, when a pulling force (downward force) larger than the elastic force of the locking piece 62 is applied to the nozzle member 22A from this state, the locking piece 62 is bent outwardly and deformed accordingly. The locked state of the nozzle member 22A by 62 is released. Thereby, the nozzle member 22A is separated from the tool holder 52.

  As shown in FIG. 4, when the nozzle member 22A is connected to the head main body 21, the internal passage 21a communicates with the inside of the nozzle member 22A, whereby the negative pressure applied to the tip of the nozzle member 22A. In addition, positive pressure can be supplied.

  Next, the configuration of the component holder 22B will be described.

  6 is a perspective view of the component holder 22B, FIG. 7 is an exploded perspective view of the component holder 22B, and FIGS. 8A and 8B are cross-sectional views of the component holder 22B. FIG. 9 is a cross-sectional view of the head 20 in a state where the component holder 22 </ b> B is mounted on the head main body 21. In addition, FIG.8 (b) has shown the cross section of the component holder 22B in the position different from Fig.8 (a).

  As shown in FIG. 6, the component holder 22B has an appearance shape similar to the nozzle member 22A described above. That is, the component holder 22B includes a component adsorbing portion 93 that adsorbs components, a flange portion 92, and a fitting shaft portion 90 that is a portion connected to the head body 21 (corresponding to the connected portion of the present invention). And) are arranged vertically. The shape of the fitting shaft portion 90 is the same as the shape of the fitting shaft portion 72 of the nozzle member 22A. Accordingly, the component holder 22B is detachably connected to the head main body 21 in the same manner as the nozzle member 22A. Specifically, as shown in FIG. 9, in the component holder 22B, the fitting shaft portion 90 is fitted into the tool fitting concave portion 56 of the tool holder 52, and the fitting shaft portion 90 is interposed via the engaging concave portion 90a. Is locked to the tool holder 52 by the locking piece 62, so that it is detachably connected to the head main body 21.

  As shown in FIGS. 7 and 8 (a) and 8 (b), the component holder 22B includes, for example, the component adsorbing portion 93, the flange portion 92, and A holder body 80 having the fitting shaft 90 and a holder body that is displaceable in a direction (vertical direction / Z direction / corresponding to the first direction of the present invention) perpendicular to the contact surface 83. A magnet 84 housed inside 80, and a coil spring 86 (one of the urging members of the present invention) that urges the magnet 84 in a direction away from the contact surface 83 (upward direction / Z2 direction); The pressure supply passage 100 (corresponding to the second passage of the present invention) formed in the holder main body 80 for guiding the operating pressure to the magnet 84 is provided.

  The holder main body 80 is composed of a first part 81 and a second part 82 assembled together, and both the parts 81 and 82 are made of a nonmagnetic material.

  The first part 81 includes the fitting shaft portion 90, the flange portion 92, a constricted portion 94, a screw shaft portion 96 having a male screw formed on the outer peripheral surface, and a cylindrical sleeve portion 98. It is a shaft-like component and has a structure in which the fitting shaft portion 90, the flange portion 92, the constricted portion 94, the screw shaft portion 96, and the sleeve portion 98 are arranged in order from the upper side. The outer diameter of the screw shaft portion 96 is slightly larger than that of the fitting shaft portion 90, and the outer diameter of the sleeve portion 98 is slightly smaller than that of the screw shaft portion 96. Therefore, a step is formed between the outer peripheral surface of the screw shaft portion 96 and the outer peripheral surface of the sleeve portion 98.

  The second part 82 is a cup-shaped member provided with the contact surface 83. Specifically, it is a cup-shaped member having a hollow and bottomed inverted frustoconical shape with an open top. The second part 82 is assembled to the lower side of the flange portion 92 of the first part 81 with the screw shaft portion 96 and the sleeve portion 98 interposed therebetween. Specifically, a female screw is formed on the upper inner peripheral surface of the second part 82, and the second part 82 is screwed onto the outer peripheral surface of the screw shaft portion 96 of the first part 81. The second part 82 is assembled to the first part 81. Thereby, the said holder main body 80 is comprised by both parts 81 and 82. As shown in FIG.

  In the state where both parts 81 and 82 are assembled, as shown in FIG. 8A, the upper end of the second part 82 abuts the lower surface of the flange 92 of the first part 81 and the first part. The distal end (lower end) of the 81 sleeve portion 98 is in contact with the inner bottom surface of the second part 82. The inner wall surface 98a of the sleeve portion 98 and the inner bottom surface of the second part 82 form a magnet housing chamber 105 having a circular cross section and a constant inner diameter in the vertical direction. The magnet 84 and the coil spring 86 are accommodated.

  The coil spring 86 is disposed in the magnet housing chamber 105 so as to be extendable in the vertical direction. The lower end portion of the coil spring 86 is fitted in a recess 82 b formed on the bottom surface of the magnet housing chamber 105 (the inner bottom surface of the second part 82), whereby the coil spring 86 is positioned at the center of the magnet housing chamber 105. Has been.

  The magnet 84 is interposed between the coil spring 86 and the ceiling surface of the magnet housing chamber 105, and is biased by the coil spring 86 in a direction away from the contact surface 83, that is, upward. . The magnet 84 includes a spherical portion 85 a that receives the elastic force from the coil spring 86, and a shaft-shaped portion 85 b that is connected to the spherical portion 85 a and is inserted into the inside from one end of the coil spring 86 and extends downward. . The spherical portion 85a is made of a hard magnetic material (that is, a permanent magnet), and the shaft-like portion 85b is made of a soft magnetic material.

  The shaft-shaped portion 85 b has a flat end surface and is cylindrical, and the magnet 84 has an operating position where the end surface of the shaft-shaped portion 85 b abuts the bottom surface of the magnet housing chamber 105, and the spherical portion 85 a It can be displaced over the abutting retracted position (position shown in FIG. 8A). The outer diameter of the shaft-like portion 85b is set to a dimension close to the inner diameter of the magnet housing chamber 105 so that the shaft-like portion 85b can slide along the inner peripheral surface of the magnet housing chamber 105. .

  In the pressure supply passage 100, the negative pressure used when the component is sucked and mounted by the nozzle member 22A is set to the operating pressure of the magnet 84, that is, the magnet 84 is moved from the retracted position to the operating position against the elastic force of the coil spring 86. This is a passage for guiding the magnet 84 as an operating pressure for movement.

  As shown in FIG. 8A, the pressure supply passage 100 is formed between the internal passage 101 formed in the fitting shaft portion 90, and the outer peripheral surface of the sleeve portion 98 and the inner peripheral surface of the second part 82. A cylindrical space 104 formed, a plurality of communication passages 102 formed inside the screw shaft portion 96 so as to connect the space 104 and the internal passage 101, and the sleeve portion 98. And a plurality of openings 98b. The opening portion 98 b of the sleeve portion 98 is a through hole that penetrates the sleeve portion 98 in the thickness direction, and is formed at the tip (lower end) portion of the sleeve portion 98. Accordingly, the pressure supply passage 100 communicates with the magnet housing chamber 105 at the lower end portion (the end portion on the contact surface 83 side) of the magnet housing chamber 105. Further, the internal passage 101 is open at the end surface of the fitting shaft portion 90, and can communicate with the internal passage 21a on the head main body 21 side.

  That is, the component holder 22 </ b> B can guide a negative pressure from the internal passage 21 a of the head body 21 to the lower end portion of the magnet housing chamber 105 through the pressure supply passage 100 in a state of being connected to the head body 21. When the negative pressure is supplied to the magnet housing chamber 105, the magnet 84 moves from the retracted position to the operating position against the elastic force of the coil spring 86, and the supply of the negative pressure is stopped. Then, the magnet 84 is reset from the operating position to the retracted position by the elastic force of the coil spring 86. A positive pressure can be supplied to the magnet housing chamber 105 as well as a negative pressure. When the magnet 84 is reset, a positive pressure is supplied into the magnet housing chamber 105 instead of the negative pressure, as will be described later. As a result, the reset operation is promoted, and the time required for the reset operation is shortened.

  Each of the plurality of communication passages 102 extends downward from the tip (lower end) of the internal passage 101 and opens at the lower end surface of the screw shaft portion 96. The communication passages 102 are provided at equal intervals in the circumferential direction. It has been.

  As shown in FIGS. 7 and 8B, the first part 81 further includes a plurality of air vent passages extending upward from the upper end of the magnet housing chamber 105 and opening to the outer peripheral surface of the constricted portion 94. 103 is formed, and the second part 82 is formed with notches 82a at a plurality of positions in the circumferential direction of the upper end thereof. With this configuration, the magnet housing chamber 105 is opened to the atmosphere through the plurality of air vent passages 103. That is, when the magnet 84 moves along the magnet accommodation chamber 105, the magnet 84 can move smoothly along the magnet accommodation chamber 105 as air enters and exits through these passages 103.

[Effects of component mounting equipment]
The component mounting operation of the component mounting apparatus 1 based on the control of the controller 9 will be described. Each head 20 is initially equipped with a nozzle member 22A.

  In the mounting operation, first, the head unit 6 moves onto the component supply unit 5, and the heads 20 are moved up and down sequentially, whereby the components are taken out from the component supply unit 5 by each head 20. Specifically, after the head 20 is disposed above the tape feeder 5a, the head 20 descends, and negative pressure is applied to the head 20 from the pressure supply unit 26 at the timing when the tip of the nozzle member 22A contacts the component. Supplied. As a result, the component is negatively adsorbed by the nozzle member 22A. Thereafter, when the head 20 is raised, components are taken out from the tape feeder 5a.

  When the component suction is completed, the head unit 6 moves above the component recognition camera 7, and the suction state of each component is image-recognized. Thereafter, the head unit 6 moves onto the substrate P on which the head unit 6 is positioned, and the suction component is mounted on the substrate P as the head 20 moves up and down. Specifically, after the head 20 is arranged above the first mounting point, the head 20 descends and the negative pressure from the pressure supply unit 26 against the head 20 is reached when the component contacts the board P. While the supply is stopped, positive pressure is instantaneously supplied from the pressure supply unit 26 to the head 20. Thereby, the suction state of the component by the nozzle member 22A is released, and the component is mounted on the substrate P. Then, the head 20 is raised.

  Thus, when the suction component of the first head 20 among the plurality of heads 20 is mounted on the substrate P, the operation moves to the mounting operation of the next component. When the suction components of all the heads 20 are finally mounted on the substrate P, the head unit 6 moves to the component supply unit 5, and the component suction and the substrate P are performed in the same operation as described above. The parts are mounted on.

  During the mounting operation, when a metal part such as a bus bar is taken out from the tray feeder 5b, the head unit 6 moves onto the tool stocker 8, and the nozzle member 22A of a part of the head 20 moves the part holder 22B. Will be replaced. Specifically, as the head 20 is lowered, the nozzle member 22A is inserted into an empty tool storage hole, and after the nozzle member 22A is locked by a locking tool (not shown), the head 20 is raised. As a result, the nozzle member 22 </ b> A is pulled out from the head body 21 and stored in the tool stocker 8. Then, after the head main body 21 is arranged above the component holder 22B stored in another tool storage hole, the head main body 21 moves up and down, so that the component holder 22B is mounted on the head main body 21. (Concatenated). That is, as shown in FIG. 9, the fitting shaft portion 90 is fitted into the tool fitting recess 56 of the head body 21, and the fitting shaft portion 90 is locked to the head body 21 by the locking piece 62. The component holder 22B is mounted on the head main body 21.

  The operation of the head 20 when the component is mounted by the head 20 to which the component holder 22B is mounted and the operation of each pressure supply unit 26 are the same as the above operation when the component is mounted by the head 20 to which the nozzle member 22A is mounted. The same. That is, when taking out the components from the tray feeder 5b, after the head 20 is disposed above the tray feeder 5b, the head 20 is lowered as shown in FIG. That is, negative pressure is supplied from the pressure supply unit 26 to the head 20 at the timing when the contact surface 83 contacts the component C. Thus, the component is magnetically attracted by the nozzle member 22A. In other words, the negative pressure is supplied from the internal passage 21a of the head 20 to the magnet housing chamber 105 through the pressure supply passage 100 of the component holder 22B, so that the magnet 84 is connected to the coil spring 86 as shown in FIG. By moving from the retracted position to the operating position against the elastic force, the magnet 84 is arranged at the operating position close to the contact surface 83 in this way, so that the component C is magnetically attracted to the contact surface 83 by its magnetic force. Is done. Thereafter, the head 20 is raised, and the component C is taken out from the tray feeder 5b.

  On the other hand, when a component is mounted on the substrate P, the head 20 is disposed above the mounting point on the substrate P, and then the head 20 is lowered and the pressure supply unit comes into contact with the component on the substrate P. The supply of negative pressure to the head 20 from 26 is stopped, and positive pressure is instantaneously supplied to the head 20. Thereby, the component C magnetically attracted to the component holder 22B is mounted on the board P. That is, when the supply of the negative pressure is stopped, the magnet 84 is reset from the operating position to the retracted position by the elastic force of the coil spring 86, and the magnet 84 is thus disposed at the retracted position away from the contact surface 83. As a result, the magnetic force acting on the component C is reduced, and the adsorption state of the component is released. At this time, as described above, the positive pressure is instantaneously (temporarily) supplied, whereby the reset operation of the magnet 84 is promoted, and the attracted state of the component C is quickly released. Then, as shown in FIG. 10C, the component 20 is mounted on the substrate P by raising the head 20.

  In this embodiment, the negative pressure corresponds to the first pressure of the present invention, and the positive pressure corresponds to the second pressure of the present invention.

  As described above, according to this component mounting apparatus 1, the nozzle member 22 </ b> A that sucks a component by negative pressure and the component holder 22 </ b> B that sucks a component by magnetic force are selectively used as the component suction tool 22. Therefore, even if it is a part such as the above-mentioned bus bar or mesh plate that cannot be held by the nozzle member 22A because a sufficient suction area cannot be secured, by using the part holder 22B, the part can be stably adsorbed by the substrate. It becomes possible to mount on P. Therefore, the freedom degree of mounting components can be raised.

  In particular, the component holder 22B has a fitting shaft portion 90 having the same shape as the fitting shaft portion 72 of the nozzle member 22A, and is mounted (connected) to the head body 21 in the same manner as the nozzle member 22A. . In addition, the component holder 22B is configured to operate the magnet 84 using the negative pressure supplied from the pressure supply unit 26 in order to adsorb the component with negative pressure. Therefore, it is possible to magnetically adsorb the components while maintaining the basic configuration of a general component mounting apparatus that conveys the components while adsorbing the negative pressure. That is, a component mounting apparatus of a type that sucks a component under a negative pressure is configured to apply a negative pressure for sucking a component and a positive pressure for releasing a suction state to the component through the internal passage of the head, similar to the component mounting apparatus 1. Generally, according to the component holder 22B, since the negative pressure is used as the operating pressure of the magnet 84, the magnet for supplying the negative pressure is used as it is. 84 can be activated.

  Further, according to the component holder 22B, as described above, the component can be adsorbed and mounted on the substrate P by the same operation as when the nozzle member 22A is used, including the negative pressure and positive pressure supply operations. . That is, even when the component holder 22B is used, the head 20 and the pressure supply unit 26 can be controlled by the same program as when the nozzle member 22A is used. Therefore, it is possible to magnetically attract components while maintaining the basic configuration of the general component mounting apparatus not only on the hardware surface but also on the software surface.

  Therefore, according to the component holder 22B, the component can be adsorbed by magnetic force and mounted on the substrate with a simple and inexpensive configuration. In addition, there is an advantage that it can be used additionally to an existing component mounting apparatus without any improvement in hardware and software.

  Furthermore, according to the component holder 22B, the magnet 84 is inserted into the spherical spring 85a that can slide along the inner peripheral surface of the magnet housing chamber 105, and the coil spring 86 connected to the spherical portion 85a. Since the configuration includes the shaft-like portion 85b, there are the following advantages.

  First, since the spherical portion 85 a slides along the inner peripheral surface of the magnet housing chamber 105, the magnet 84 can be smoothly moved along the magnet housing chamber 105 without being shaken. Particularly in this case, since the spherical portion 85a and the inner peripheral surface of the magnet housing chamber 105 are in line contact, the inner peripheral surface and the magnet 84 are compared to the case where the spherical peripheral portion is not spherical but is cylindrical and the inner peripheral surface is in surface contact. And frictional resistance is reduced. Therefore, also in this respect, the magnet 84 can be smoothly moved along the magnet housing chamber 105. In addition, since the magnet 84 has a shaft-like portion 85 b that is connected to the spherical portion 85 a and is inserted inside the coil spring 86, the magnet 84 is biased with a relatively simple configuration using the coil spring 86. However, at the time of supplying negative pressure to the magnet housing chamber 105, there is an advantage that the magnet 84 can be arranged at a position closer to the component and the component can be magnetically attracted. In other words, when the shaft-like portion 85 b is not provided, the magnet 84 is disposed at a position separated from the bottom surface of the magnet housing chamber 105 by the dimension of the coil spring 86 even when the coil spring 86 is completely contracted. However, according to the magnet 84 having the shaft-shaped portion 85b, the magnet 84 can be brought into contact with the bottom surface of the magnet housing chamber 105 through the shaft-shaped portion 85b as the coil spring 86 contracts as described above. Since it can do (refer FIG.10 (b)), the magnet 84 can be arrange | positioned in the position nearer to components, and the magnetic force can be made to act on components. Therefore, it becomes possible to adsorb parts more reliably.

  Further, according to the component mounting apparatus 1, when the component is mounted on the board P by the component holder 22B, the supply of the negative pressure by the pressure supply unit 26 is stopped, and then the positive pressure is instantaneously supplied. Since the reset operation of the magnet 84 is promoted, there is also an advantage that it is possible to suppress troubles caused by the delay of the reset operation of the magnet 84, for example, take-out of parts.

[Modification]
(1) In the component mounting apparatus 10, when the component adsorbed by the component holder 22 </ b> B is mounted on the substrate P, supply of negative pressure from the pressure supply unit 26 to the head 20 (magnet accommodating chamber 105) is stopped. Thereafter, a positive pressure is instantaneously supplied to the head 20 to promote the reset operation of the magnet 84. However, such a positive pressure supply operation may be omitted, and the magnet 84 may be reset from the operating position to the retracted position only by the elastic force of the coil spring 86.

  (2) In the component mounting apparatus 10, the component holder 22 </ b> B is configured to be detachable from the head main body 21, but the component holder 22 </ b> B is integrally incorporated in the head main body 21 so as not to be removable. It may be.

  (3) The component holder 22B operates the magnet 84 using the negative pressure supplied from the pressure supply unit 26 as an operating pressure, that is, moves the magnet 84 from the retracted position to the operating position against the biasing force of the coil spring 86. Although it is a structure to move, it is good also as a structure which operates the magnet 84 by making positive pressure (air pressure) into an operating pressure. In this case, instead of the communication passage 102, a communication passage that connects the upper end of the magnet housing chamber 105 and the internal passage 101 is provided, and the constriction extends upward from the space 104 outside the sleeve portion 98. The air vent passage 103 may be provided so as to open on the outer peripheral surface of the portion 94. In other words, when the component is attracted, positive pressure is supplied from the internal passage 101 to the upper end of the magnet housing chamber 105, and the magnet 84 is pushed down from the retracted position to the operating position by the positive pressure. Then, the supply of the positive pressure is stopped, and the magnet 84 is reset from the operating position to the retracted position by the elastic force of the coil spring 86. In this case, the reset operation of the magnet 84 may be promoted by supplying a negative pressure instantaneously from the internal passage 101 to the upper end of the magnet housing chamber 105 after the positive pressure is supplied. In this case, the positive pressure corresponds to the first pressure of the present invention, and the negative pressure corresponds to the second pressure of the present invention.

  The present invention described above is summarized as follows.

  The present invention is a component holder that is mounted on a movable head main body having a first passage to which negative pressure or positive pressure is supplied, and constitutes a head for magnetically adsorbing components together with the head main body. A holder body provided with a contact surface of a component, a magnet housed in the holder body in a state displaceable in a first direction orthogonal to the contact surface, and the magnet as the contact surface An urging member for urging in a direction away from the first passage, and the holder main body so as to communicate with the first passage, and the urging force is applied to the negative pressure or the positive pressure supplied to the first passage. And a second passage that guides the magnet to the magnet as an operating pressure that causes the magnet to approach the contact surface against the biasing force of the member.

  According to this component holder, when negative pressure or positive pressure is supplied to the head body, the negative pressure is guided from the head body to the magnet through the first and second passages and resists the biasing force of the biasing member. The magnet approaches the contact surface. As a result, the component is attracted by the magnetic force of the magnet. On the other hand, when the supply of the negative pressure or the positive pressure to the head body is stopped, the magnet is reset to a position away from the contact surface by the biasing force of the biasing member. Thereby, the magnetic force which acts on components falls and the adsorption | suction state of components is cancelled | released. Therefore, according to this component holding part, components can be adsorbed by magnetic force and mounted on a substrate while maintaining the configuration of a general component mounting apparatus that adsorbs components under negative pressure. In other words, a component mounting apparatus that sucks a component under negative pressure is configured to apply a component suction negative pressure or a suction state release positive pressure to the component through the internal passage of the head. For example, the magnet can be moved using equipment for supplying negative pressure or positive pressure to the head. Therefore, the components can be attracted by magnetic force and mounted on the substrate with a simpler and less expensive configuration.

  As a more specific configuration, the holder body has a magnet housing chamber extending in the first direction, the magnet and the biasing member are housed in the magnet housing chamber, and the second passage is One end of the magnet housing chamber in the first direction communicates with the magnet housing chamber.

  According to this configuration, the magnet can be smoothly moved in the first direction using a negative pressure or a positive pressure as an operating pressure.

  In this case, it is preferable that the magnet has a shape that can slide along the inner peripheral surface of the magnet housing chamber.

  According to this configuration, the gap between the inner peripheral surface of the magnet housing chamber and the magnet is reduced, and the operating pressure can be applied to the magnet more efficiently, that is, the magnet can be moved more reliably.

  Further, in this case, the magnet accommodating chamber has a circular cross section and a constant inner diameter in the first direction, and the magnet has a spherical portion that can slide on the inner peripheral surface of the magnet accommodating chamber. It is suitable to have.

  According to this configuration, since the inner peripheral surface of the magnet housing chamber and the magnet are in line contact and the frictional resistance is reduced, the magnet can be moved more smoothly.

  In this case, the biasing member is a coil spring that can be expanded and contracted in the first direction, and the magnet is in contact with one end of the coil spring and receives the biasing force from the coil spring, It is preferable to have a columnar portion connected to the spherical portion and inserted from the one end to the inside of the coil spring.

  According to this configuration, since the columnar portion is provided inside the coil spring, the magnet can be brought closer to the contact portion as the coil spring contracts. Therefore, it is possible to more reliably attract the components with magnetic force while biasing the magnet with a relatively simple configuration using a coil spring.

  In this case, the spherical portion and the columnar portion may be integrally formed of a hard magnetic body (that is, a permanent magnet). However, the spherical portion is formed of a hard magnetic body, and the columnar portion is a soft magnetic body. It may be formed by.

  The head main body includes a connecting portion to which a nozzle member for sucking a component with negative pressure is detachably connected, and the negative pressure for sucking the component is supplied to the first passage. The component holder has a connected portion that can be connected to the connecting portion, and the connected portion is connected to the connecting portion so as to be detachably attached to the head. It is preferable that the second passage guides the negative pressure to the magnet as the operating pressure.

  According to this configuration, the component holder can be detachably connected to the head body to which the nozzle member for negatively adsorbing the component is detachably connected. Therefore, the component holder can be assembled and used on the head body without providing a special structure on the head body side. In addition, when a component is mounted by the component holder, it is possible to mount the component based on the same operation as when the component is mounted by the nozzle member. That is, when attracting a component, negative pressure is supplied to the component holder to bring the magnet closer to the contact surface, and when mounting the component, the supply of the negative pressure is stopped and the magnet is separated from the contact surface. The component can be mounted according to the same operation as that when the component is mounted by the nozzle member.

  In this case, the second passage may be configured to communicate with the magnet housing chamber at one end portion of the magnet housing chamber in the first direction and at one end portion on the contact surface side.

  According to this configuration, the negative pressure makes it possible to cause the magnet to approach the contact surface satisfactorily against the biasing force of the biasing member.

  On the other hand, the component mounting apparatus according to the present invention includes a movable head body provided with a first passage, a pressure supply device that supplies negative pressure or positive pressure to the first passage, and any of the above that is mounted on the head body. And a control device for controlling the pressure supply device so as to apply the negative pressure or the positive pressure to the magnet of the component holder as the operating pressure.

  According to this component mounting apparatus, components can be adsorbed by magnetic force and mounted on a substrate with a simple and inexpensive configuration using the component holder as described above.

  In this configuration, the pressure supply device alternatively supplies a negative pressure and a positive pressure to the first passage. One of the negative pressure and the positive pressure is the first pressure, and the other is the other. When the second pressure is defined, the component holder uses the first pressure as the operating pressure, and the control device controls the pressure supply device to magnetize the component by the component holder. It is preferable that the first pressure is supplied when adsorbing, and the second pressure is temporarily supplied after the supply of the first pressure is stopped when the component is mounted on the substrate.

  According to this configuration, since the resetting operation of the magnet is promoted, it is possible to suppress troubles such as take-out of parts.

Claims (10)

A component holder mounted on a movable head body having a first passage to which negative pressure or positive pressure is supplied, and constituting a head for magnetically adsorbing components together with the head body,
A holder body having a contact surface of the component;
A magnet housed inside the holder body in a displaceable manner in a first direction orthogonal to the contact surface;
A biasing member that biases the magnet in a direction away from the contact surface;
Provided in the holder main body so as to communicate with the first passage, the negative pressure or the positive pressure supplied to the first passage against the biasing force of the biasing member, and the magnet abuts A second passage leading to the magnet as an operating pressure to approach the surface ,
The holder body has a magnet housing chamber extending in the first direction;
The magnet and the biasing member are housed in the magnet housing chamber,
The second passage communicates with the magnet housing chamber at one end of the magnet housing chamber in the first direction,
The said magnet has a shape which can be slid along the internal peripheral surface of the said magnet storage chamber, The components holder characterized by the above-mentioned. The component holder according to claim 1 ,
The magnet housing chamber is circular in cross section and has a constant inner diameter over the first direction,
The said magnet has a spherical part which can slide on the internal peripheral surface of the said magnet storage chamber, The components holder characterized by the above-mentioned. The component holder according to claim 2 ,
The biasing member is a coil spring that can expand and contract in the first direction,
The magnet includes the spherical portion that contacts one end of the coil spring and receives a biasing force from the coil spring, and a columnar portion that is connected to the spherical portion and inserted from the one end to the inside of the coil spring. A component holder characterized by. The component holder according to claim 3 ,
The spherical part is formed of a hard magnetic material, and the columnar part is formed of a soft magnetic material. In the component holder of Claims 1 thru | or 4 ,
The head body includes a connecting portion to which a nozzle member for negatively adsorbing a component is detachably connected, and a negative pressure for adsorbing the component is supplied to the first passage,
The component holder has a connected portion that can be connected to the connecting portion, and the connected portion is detachably attached to the head by being connected to the connecting portion,
The component holder according to claim 2, wherein the second passage guides the negative pressure to the magnet as the operating pressure. In the component holder of Claim 5 ,
The second passage is one end of the magnet housing chamber in the first direction and communicates with the magnet housing chamber at one end on the contact surface side. A movable head body having a first passage;
A pressure supply device for supplying negative pressure or positive pressure to the first passage;
The component holder according to any one of claims 1 to 4 , which is mounted on the head body,
A component mounting apparatus comprising: a control device that controls the pressure supply device to apply the negative pressure or the positive pressure to the magnet of the component holder as the operating pressure. In the component mounting apparatus according to claim 7 ,
The pressure supply device alternatively supplies negative pressure and positive pressure to the first passage,
When one of the negative pressure and the positive pressure is defined as a first pressure and the other is defined as a second pressure, the component holder uses the first pressure as the operating pressure,
The control device controls the pressure supply device, supplies the first pressure when the component is magnetically attracted by the component holder, and stops supplying the first pressure when the component is mounted on the substrate. Thereafter, the component mounting apparatus is characterized in that the second pressure is temporarily supplied. A movable head body having a first passage;
A pressure supply device for supplying a negative pressure to the first passage;
The component holder according to claim 5 or 6, which is attached to the head body,
A component mounting apparatus comprising: a control device that controls the pressure supply device so as to apply the negative pressure to the magnet of the component holder as the operating pressure. In the component mounting apparatus according to claim 9,
The pressure supply device alternatively supplies negative pressure and positive pressure to the first passage,
The component holder has the negative pressure as the operating pressure,
The control device controls the pressure supply device, supplies the negative pressure when magnetically attracting the component by the component holder, and stops supplying the negative pressure when mounting the component on the substrate, A component mounting apparatus characterized by temporarily supplying the positive pressure.

Images