JP2012080064A - Component mounting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a constitution for switching pressure to be supplied to a nozzle, in a component mounting apparatus which uses the nozzle to mount components on a substrate while switching the pressure supplied to the nozzle.SOLUTION: A nozzle holder 51 is inserted into a through-hole of a cylindrical member 52 and is supported by the cylindrical member 52. A suction nozzle 83 is held in a holding hole provided on the nozzle holder 51 in such a manner that the suction nozzle 83 is freely movable in the vertical axis direction (Z-direction). The suction nozzle 83 is provided with two flow holes FH1 and FH2, while the nozzle holder 51 is provided with two communication holes CH1 and CH2. The communicative connection between the communication holes and the flow holes is switched by lowering the nozzle to a component suction position or by lifting the nozzle to an elevation end. Consequently, negative pressure supplied via an air pressure guide passage 831 to a tip end of the suction nozzle 83 is adjusted.

Description

  The present invention relates to a component mounting apparatus that picks up a component by the nozzle while switching the pressure supplied to the nozzle in accordance with the lifting and lowering operation of the nozzle, and mounts the sucked component on a substrate.

  As a component mounting apparatus having a mechanism for switching the pressure supplied to the nozzle in accordance with the lifting and lowering operation of the nozzle, for example, the one described in Patent Document 1 is known. In the apparatus described in Patent Document 1, a plurality of suction nozzles are provided to be movable up and down at predetermined intervals along a rotation direction of a horizontally rotatable nozzle holder. Further, a negative pressure side spool valve and a positive pressure side spool valve are provided for each suction nozzle with respect to the nozzle holder. A negative pressure passage that supplies negative pressure into each suction nozzle is configured to be opened and closed by each negative pressure side spool valve, and a positive pressure passage that supplies positive pressure (or atmospheric pressure) into each suction nozzle is positive. The pressure side spool valve can be opened and closed.

Japanese Patent Laying-Open No. 2004-311807 (for example, FIG. 7)

  As described above, in the apparatus described in Patent Document 1, in order to supply two different pressures to the nozzle, it is necessary to provide two types of spool valves, and the configuration for switching the pressure supplied to the nozzle is as follows. It is complicated. Further, in this apparatus, it is necessary to provide two types of spool valves for one nozzle, and the number of spool valves to be provided in the nozzle holder increases as the number of nozzles attached to the nozzle holder increases. Therefore, in the component mounting apparatus in which a plurality of nozzles are attached to the nozzle holder, an increase in the size of the nozzle holder is unavoidable, which causes a problem that the component mounting apparatus is increased in size.

  The present invention has been made in view of the above problems, and in a component mounting apparatus that mounts a component on a substrate with the nozzle while switching the pressure supplied to the nozzle, a configuration for switching the pressure supplied to the nozzle. The purpose is to simplify.

  A component mounting apparatus according to the present invention is a component mounting apparatus that sucks a component at the tip of a nozzle extending in the vertical axis direction and mounts the sucked component on a substrate. A holding portion that holds the nozzle movably in the vertical axis direction while sliding the nozzle side surface along the inner peripheral surface of the holding hole, and a holding portion. A nozzle moving mechanism for moving the nozzle in the vertical axis direction, the nozzle including at least one of an air pressure introduction passage extending from the side surface of the nozzle to the air pressure introduction passage. The holding portion has a first communicating hole that communicates with the retaining hole and can supply the first negative pressure to the retaining hole, and a second negative pressure that communicates with the retaining hole. And a second communication hole that enables supply to the holding hole. The fluid movement mechanism includes a lowering of the nozzle to the first position where the flow hole communicates only with the first communication hole, and a rise of the nozzle to the second position where the flow hole communicates only with the second communication hole. Thus, the negative pressure supplied to the tip of the nozzle through the air pressure introduction passage is adjusted.

  In the invention thus configured, the nozzle is provided with the flow hole, while the holding portion that holds the nozzle is provided with the first communication hole and the second communication hole, and the nozzle is lowered to the first position and the second communication hole is provided. As the nozzle rises to this position, the communication connection between the first communication hole, the second communication hole, and the flow hole is switched, and the negative pressure supplied to the tip of the nozzle via the air pressure introduction passage is adjusted. . Therefore, it is possible to switch the pressure supplied to the nozzle with a simple configuration as compared with the prior art.

  Further, when the nozzle is positioned at the first position and the second position, a negative pressure corresponding to each position is supplied to the nozzle. Therefore, the nozzle is moved to the first position, and the component is adsorbed to the nozzle by the first negative pressure. Further, when the nozzle is raised to the second position in order to move the sucked component to the substrate side, the second negative pressure is supplied to the nozzle at the second position, so that the component is dropped from the nozzle. Without moving, the nozzle can be moved to the substrate side while adsorbing the components. Since the first negative pressure and the second negative pressure are supplied through the first communication hole and the second communication hole, respectively, the first negative pressure and the second negative pressure are supplied. The pressure can be set to a value suitable for component suction and a value suitable for component conveyance.

  Here, when the first communication hole is configured to have a long hole shape extending in the vertical axis direction, the range of the first position is expanded in the vertical axis direction. That is, the range in the vertical axis direction in which the first negative pressure can continue to be supplied to the nozzle through the first communication hole and the flow hole is increased by the extent that the first communication hole extends in the vertical axis direction. The following effects can be obtained. That is, the suction height position when sucking a component with a nozzle and the mounting height position when mounting the sucked component on a substrate may differ depending on variations due to the height dimensions of various components. Therefore, by using the long hole-shaped communication hole, even if the nozzle is appropriately moved up and down within the range of the first position by the nozzle driving mechanism, the component can be adsorbed and held by the nozzle without any trouble.

  The number of flow holes is arbitrary. For example, when the first flow hole and the second flow hole are provided as flow holes, the first flow hole, the second flow hole, and the first communication hole. In addition, the positional relationship between the second communication holes may be as follows. When the nozzle is moved to the first position, at least one of the first flow hole and the second flow hole communicates with only the first communication hole, while the second communication hole is on the side surface of the nozzle. The first negative pressure can be supplied to the nozzle by being blocked and not communicating with any of the flow holes. Further, when the nozzle is positioned at the second position, only one of the first circulation hole and the second circulation hole communicates with only the second communication hole, while the other circulation hole The second negative pressure can be supplied to the nozzle by being blocked by the inner peripheral surface of the holding hole and not communicating with any of the communication holes. Furthermore, when the nozzle is positioned at a third position between the first position and the second position, one of the first circulation hole and the second circulation hole is the first communication hole. And the other flow hole communicates only with the second communication hole, whereby negative pressure is supplied to the nozzle. Therefore, even when the nozzle is moving between the first position and the second position, negative pressure is always supplied to the nozzle, and the component is sucked and held by the nozzle while the nozzle is moving, and the component falls. Can be reliably prevented.

  Further, when the nozzle is moved to the first position, both the first flow hole and the second flow hole may be configured to communicate with only the first communication hole. Since the total cross-sectional area (effective cross-sectional area) of each flow hole at the position becomes large, a negative pressure at the time of component adsorption can be supplied to the nozzle all at once.

  The first flow hole and the second flow hole may be provided at substantially the same position in the vertical axis direction and spaced apart from each other in the circumferential direction around the vertical axis direction, and the nozzle moves to the first position. When configured, only the first flow hole communicates with only the first communication hole, and the second flow hole is blocked by the inner peripheral surface of the holding hole and does not communicate with any communication hole. Thus, the following effects can be obtained. That is, the first negative pressure is supplied from the direction corresponding to the formation position of the first flow hole, while the second negative pressure is supplied from the direction corresponding to the formation position of the second flow hole. The negative pressure supply direction and the second negative pressure supply direction are different from each other in the circumferential direction around the vertical axis direction. Therefore, the pneumatic piping and the pneumatic supply source for supplying the negative pressure to the holding unit can be shifted around the nozzle, and the degree of freedom in layout can be increased. In addition, since the first flow hole and the second flow hole are arranged at substantially the same position in the vertical axis direction, the interval between the flow holes is narrowed in the vertical axis direction, and the holding portion is downsized in the vertical axis direction. can do. In addition, the fitting range between the nozzle and the holding portion is narrowed according to the narrowing of the interval, facilitating fitting accuracy, and the manufacturing cost can be reduced.

  Further, the communication hole may be configured as described above instead of the flow hole. That is, the first communication hole and the second communication hole may be provided in the holding portion so as to be separated from each other in the circumferential direction around the vertical axis direction and so that the hole centers are substantially at the same position in the vertical axis direction. Also in this case, the supply direction of the first negative pressure and the supply direction of the second negative pressure are different from each other in the circumferential direction around the vertical axis direction. Therefore, it is possible to dispose the pneumatic piping, the pneumatic supply source, and the like so as to be shifted around the nozzle, thereby increasing the degree of layout freedom.

  Further, only one flow hole may be provided. In this case, when the nozzle is positioned at a third position between the first position and the second position, the flow hole communicates with each communication hole at the same time across the first communication hole and the second communication hole. It is preferable to configure so as to. In this case, the negative pressure is always supplied to the nozzle even while the nozzle is moving between the first position and the second position, and the component is sucked and held by the nozzle even during the movement of the nozzle. It is possible to reliably prevent the fall. Further, the manufacturing cost can be reduced by setting the minimum number of flow holes.

  Further, the first switching means is further connected to the first communication hole and selectively supplies the first negative pressure or the first positive pressure to the holding hole through the first communication hole. May be. In this case, by switching the pressure applied to the nozzle from negative pressure to positive pressure, the components adsorbed on the nozzle can be easily separated by air blow. Further, since the positive pressure and the negative pressure can be alternatively supplied only by switching by the switching means, the structure for supplying the positive pressure and the negative pressure becomes simple.

  Moreover, you may comprise similarly to a 1st communicating hole also with respect to a 2nd communicating hole. That is, it is configured to further include second switching means connected to the second communication hole and selectively supplying the second negative pressure or the second positive pressure to the holding hole through the second communication hole. May be. In this case, for example, when the nozzle is moved to the second position without adsorbing components, the pressure applied to the nozzle is switched from negative pressure to positive pressure, so that the air pressure introduction passage and the nozzle tip are air-purged by air purge. Can be washed. Further, by configuring the absolute value of the first positive pressure to be smaller than the absolute value of the second positive pressure, the following effects can be obtained. That is, when mounting the component by lowering the nozzle by the nozzle driving mechanism, there is an effect that it is not necessary to increase the positive pressure of the air blow when removing the component from the nozzle. In addition, there is an effect that the positive pressure supply capability of the positive pressure source that generates the first positive pressure can be reduced.

  In addition, the component mounting apparatus may include a plurality of nozzles in order to increase mounting efficiency. In this case, the holding portion has a plurality of holding holes provided apart from each other in the vertical axis direction, and the plurality of nozzles are fitted into the holding holes one by one, along the inner peripheral surface of the holding hole. As in the above invention, the nozzle is held by the holding portion so as to be movable in the vertical axis direction while sliding the side surfaces of the nozzles, and the nozzle moving mechanism selectively moves the plurality of nozzles in the vertical axis direction. The following effects can be obtained. That is, the pressure supplied to the plurality of nozzles can be switched with a simple structure.

  In addition, the component mounting apparatus having a plurality of nozzles as described above further includes a cylindrical member that is supported by fitting a holding portion into a through hole penetrating in the vertical axis direction, and each holding hole has a first communication. The hole and the second communication hole communicate with each other, and the cylindrical member is configured to be able to communicate with the plurality of first communication holes, so that the first negative pressure can be supplied to the plurality of first communication holes. An air pressure supply hole; and a second air pressure supply hole configured to be able to communicate with the plurality of second communication holes and capable of supplying a second negative pressure to the plurality of second communication holes. At least one of the inner peripheral surface and the outer peripheral surface of the holding portion is provided with a first annular groove that communicates the plurality of first communication holes and the first air pressure supply hole, and the inner peripheral surface of the through hole and the holding portion A second annular groove that communicates the plurality of second communication holes and the second air pressure supply hole to at least one of the outer peripheral surfaces. It is preferable to configure as vignetting. In this case, the first negative pressure can be supplied to all the nozzles by supplying the first negative pressure through the first air pressure supply hole, and further, the first negative pressure can be supplied through the second air pressure supply hole. By supplying a negative pressure of 2, a second negative pressure can be supplied to all nozzles. Therefore, even if there are a plurality of nozzles, the pressure supplied to the plurality of nozzles can be switched with a simple structure by providing one supply source for each of the first negative pressure and the second negative pressure. it can.

  In addition, as a configuration including a plurality of nozzles, for example, the holding portion has a plurality of holding holes arranged in a horizontal direction perpendicular to the vertical axis direction, and each of the plurality of nozzles is provided in each holding hole. It is fitted and held by the holding part so as to be movable in the vertical axis direction while sliding the nozzle side surface along the inner peripheral surface of the holding hole, and the nozzle moving mechanism selectively moves the plurality of nozzles in the vertical axis direction. You may comprise so that the effect similar to the said invention is show | played.

  Further, the first communication hole is formed in the holding portion so as to communicate with the plurality of holding holes, and the second communication hole is separated from the first communication hole so as to communicate with the plurality of holding holes. It may be configured to be formed in the holding part. In this case, the first negative pressure can be supplied to all the nozzles by supplying the first negative pressure through the first communication hole, and further the second negative hole can be supplied through the second communication hole. The second negative pressure can be supplied to all the nozzles by supplying the negative pressure. Therefore, even if there are a plurality of nozzles, the pressure supplied to the plurality of nozzles can be switched with a simple structure by providing one supply source for each of the first negative pressure and the second negative pressure. it can.

  A plurality of first communication chamber portions provided so that the holding portion communicates with each of the plurality of holding holes at a first height position in the vertical axis direction; and a first height position; A plurality of second communication chamber portions provided so as to communicate with the plurality of holding holes one by one at different second height positions in the vertical axis direction, and the first communication hole includes a plurality of first communication holes. A plurality of holding holes are communicated with each other via one communication chamber portion, and a plurality of holding holes are communicated with each other via a plurality of second communication chamber portions. Also good.

  Note that the relationship between the first negative pressure and the second negative pressure is arbitrary, but when the nozzle is moved downward and suction of components by the tip of the nozzle is started at the first position, the first negative pressure It may be desirable that the absolute value of the negative pressure be greater than the absolute value of the second negative pressure. This is because, when picking up a component, it is possible to pick up the component reliably by picking up the component with a large negative pressure, but after picking up the component with the nozzle tip, the nozzle is raised to the second position. This is because if it is moved, the suction force at the start of component suction may not be required. In addition, such a configuration also has the effect that the negative pressure supply capability of the negative pressure source that generates the second negative pressure can be reduced.

  Further, when the nozzle is moved upward while the component is adsorbed at the tip of the nozzle and then horizontally moved at high speed and stopped, the absolute value of the second negative pressure is the first negative pressure. It may be desirable to configure it to be greater than the absolute value of. This is because when the horizontally moving nozzle suddenly stops, a large inertial force acts on the part, and the part may fall off. In addition, such a configuration also has the effect of reducing the negative pressure supply capability of the negative pressure source that generates the first negative pressure.

  In a component mounting apparatus having a plurality of nozzles, it may be desirable to configure the absolute value of the first negative pressure and the absolute value of the second negative pressure to be equal. That is, it is sufficient to suck parts and can supply a negative pressure sufficient to prevent parts from falling off even during a sudden stop during horizontal movement. There is an effect that it can be reduced.

  As described above, the air pressure introduction passage extends to the nozzle tip, and the flow hole extends from the side surface of the nozzle to the air pressure introduction passage. Further, in the holding portion that holds the nozzle with the holding hole, a first communication hole that is communicated with the holding hole and can supply the first negative pressure to the holding hole, and a second negative hole that is communicated with the holding hole. There is provided a second communication hole that enables supply of pressure to the holding hole. When the nozzle is lowered to the first position, the flow hole communicates only with the first communication hole, while when the nozzle is raised to the second position, the flow hole becomes the second communication hole only. Communicate. Thus, the negative pressure supplied to the tip of the nozzle can be adjusted with a simple structure.

It is a top view which shows schematic structure of 1st Embodiment of the component mounting apparatus concerning this invention. FIG. 2 is a partial isometric view of a head unit equipped in the component mounting apparatus shown in FIG. 1. It is a partial side view of the head unit with which the component mounting apparatus shown in FIG. 1 is equipped. It is a figure which shows the mechanism which supplies an air pressure to each nozzle with which the mounting head was mounted | worn. It is a fragmentary sectional view of the head for mounting. It is a figure which shows typically the connection relation of the flow hole provided in a nozzle, and the communicating hole provided in a holding | maintenance part. It is a figure which shows typically the connection relation of the through-hole and communicating hole in 2nd Embodiment of the component mounting apparatus concerning this invention. It is a figure which shows typically the connection relationship of the through-hole and communicating hole in 3rd Embodiment of the component mounting apparatus concerning this invention. It is a figure which shows typically the connection relationship of the through-hole and communicating hole in 4th Embodiment of the component mounting apparatus concerning this invention. It is a figure which shows typically the connection relation of the through-hole and communicating hole in 5th Embodiment of the component mounting apparatus concerning this invention. It is a side view which shows 8th Embodiment of the component mounting apparatus concerning this invention. It is a front view of the head unit employ | adopted in 8th Embodiment. It is a fragmentary sectional view of the head unit shown in FIG. It is a fragmentary sectional view which shows the structure of a bracket. It is AA arrow sectional drawing in FIG. It is BB arrow sectional drawing in FIG. It is CC sectional view taken on the line in FIG. It is a figure which shows the connection state of the negative pressure generator with respect to a communicating hole, and a switching valve. It is a figure which shows the connection state of the negative pressure generator with respect to the communicating hole and switching valve in 9th Embodiment of the component mounting apparatus concerning this invention. It is a figure which shows typically another embodiment of a component mounting apparatus.

  FIG. 1 is a plan view showing a schematic configuration of a first embodiment of a component mounting apparatus according to the present invention. In FIG. 1 and the drawings described later, XYZ rectangular coordinate axes are shown in order to clarify the directional relationship between the drawings.

  In the component mounting apparatus 1, the board transport mechanism 2 is disposed on the base 11, and the board 3 can be transported in a predetermined transport direction X. More specifically, the substrate transport mechanism 2 has a pair of conveyors 21 and 21 that transport the substrate 3 from the right side to the left side of FIG. And the conveyors 21 and 21 carry in the board | substrate 3, make it stop in a predetermined mounting operation position (position of the board | substrate 3 shown to the same figure), and fix and hold | maintain the board | substrate 3 with a holding device not shown. The head unit 6 is supplied from the component supply unit 4 while being moved in the X-axis direction and the Y-axis direction (directions orthogonal to the X-axis and Z-axis directions) over a predetermined range of the base 11 by the head moving mechanism. The electronic component is transferred onto the substrate 3 by the mounting head 8 mounted on the head unit 6. When the mounting process is completed for all the components to be mounted on the substrate 3, the substrate transport mechanism 2 unloads the substrate 3. A component recognition camera 7 is disposed on the base 11. The component recognition camera 7 includes an illumination unit, a CCD (Charge Coupled Device) camera, and the like, and picks up images of electronic components held by the mounting heads 8 of the head unit 6 from below. ing.

  The component supply unit 4 described above is arranged on the front side (+ Y axis direction side) and the rear side (−Y axis direction side) of the substrate transport mechanism 2 configured as described above. These component supply units 4 include a number of tape feeders 41. Each tape feeder 41 is provided with a reel (not shown) around which a tape storing and holding electronic components is wound, so that the electronic components can be supplied to the head unit 6. In other words, each tape stores and holds small chip electronic components such as integrated circuits (ICs), transistors, and capacitors at predetermined intervals. Then, the tape feeder 41 feeds the tape from the reel to the head unit 6 side, so that the electronic components in the tape are intermittently fed out. As a result, the electronic components can be adsorbed by the mounting head 8 of the head unit 6. Become.

  The head unit 6 transports the electronic component sucked by the component supply unit 4 by the mounting head 8 to the substrate 3 and transfers it to the mounting position designated by the user. Next, the configuration of the head unit 6 and the mounting head 8 included in the head unit 6 will be described with reference to FIGS. Here, FIG. 2 is a partial isometric view of the head unit, and FIG. 3 is a partial side view of the head unit. FIG. 4 is a view showing a mechanism for supplying air pressure to each nozzle mounted on the mounting head. FIG. 5 is a partial sectional view of the mounting head.

  The head unit 6 has a schematic configuration in which four mounting heads 8 are arranged in a line in the X direction (horizontal direction) and supported by a support frame 61 from the rear (−Y direction). Specifically, these mounting heads 8 are supported by two arms 61 a and 61 b extending forward (+ Y direction) from the support frame 61. Since the four mounting heads 8 have a substantially common configuration, the following description of the mounting head 8 is basically represented by one mounting head 8 and the other mounting heads. 8 will be denoted by the same reference numerals and description thereof will be omitted as appropriate.

  The mounting head 8 includes a long shaft 81 extending in the vertical axis (Z-axis) direction. A nozzle holder 51 is disposed below the shaft 81 in the vertical axis direction (Z direction). As shown in FIGS. 4 and 5, the nozzle holder 51 has a columnar shape extending in the vertical axis direction (Z direction), and a recess 511 formed from above along the axis. The lower end of the shaft 81 is inserted into the nozzle holder 51 and is fixed to the nozzle holder 51 from the lower surface side of the nozzle holder 51 with a fastening member such as a screw or a bolt.

  Thus, in order to support these with the arm 61a in the state in which the nozzle holder 51 was being fixed to the lower end part of the shaft 81, the cylindrical member 52 is used in this embodiment. The cylindrical member 52 has an outer diameter that is approximately the same as the inner diameter of the four through holes 61a1 provided in the arm 61a, and has a through hole 521 that penetrates in the vertical axis direction (Z direction). And as shown in FIG. 4, the cylindrical member 52 is inserted by the through-hole 61a1 of the arm 61a, and is supported by the arm 61a. Further, the nozzle holder 51 is fitted into the through hole 521 of the cylindrical member 52 and is supported by the cylindrical member 52. Thus, the nozzle holder 51 is supported on the lower end portion of the shaft 81 by the arm 61a.

  In this embodiment, the arm 61a does not function as a mere support member, but is connected to the first air pressure supply unit 53 (FIG. 5) on the front (+ Y direction) side surface and the second air pressure. In addition to having a connection portion CP2 for connecting to the supply portion 54 (FIG. 5), it has a function of supplying air pressure to a nozzle described later via a manifold (not shown) formed inside. Further, in order to supply the air pressure thus supplied to the nozzle, a groove, a hole, or the like is provided in the nozzle holder 51 and the cylindrical member 52 to constitute an air pressure supply mechanism to the nozzle 83. The configuration and operation will be described in detail later.

  As shown in FIG. 4, the nozzle holder 51 has eight holding holes 512 that are circumferentially spaced around the vertical axis (Z axis) centered on the above-described recess 511, in the vertical axis direction (Z direction). ). One suction nozzle 83 is inserted into each holding hole 512. More specifically, the nozzle 83 is held by the nozzle holder 51 movably in the vertical axis direction while sliding the side surface of the nozzle 83 along the inner peripheral surface of the holding hole 512. Each holding hole 512 is provided with a biasing member 82 such as a spring, and the nozzle 83 is biased in the upward direction (+ Z direction) by each biasing member 82, which will be described next. While the pressing force from the pressing mechanism does not act, the nozzle 83 is positioned at the rising end position like the right nozzle in FIG.

  The pressing mechanism is provided above the eight suction nozzles 83 in the vertical axis direction (Z direction), and a mechanism for selectively lowering one of these suction nozzles 83 to be used for component suction. It is. Specifically, the pressing mechanism includes a guide member 84, a moving member 85 that is movable with respect to the guide member 84, a nozzle pressing member 86 that moves integrally with the moving member 85, and a nozzle pressing on the moving member 85. This is realized by a link member 87 that couples the member 86.

  That is, a guide member 84 having a cylindrical shape whose central axis is parallel to the vertical axis direction (Z direction) is disposed on the upper side of the shaft 81 in the vertical axis direction (Z direction). The guide member 84 is attached so that the central axis thereof coincides with the central axis of the shaft 81, and a groove C is formed on the peripheral surface thereof.

  Below the guide member 84 in the vertical axis direction (Z direction) (FIG. 5), a moving member 85 that is movable in the vertical axis direction (Z direction) with respect to the guide member 84 is provided. The moving member 85 has a cylindrical shape whose central axis is parallel to the vertical axis direction (Z direction), and a cylindrical hole penetrating in the vertical axis direction (Z direction) is formed as a hollow portion. The diameter of the hollow portion of the moving member 85 is slightly larger than the diameter of the guide member 84, and the moving member 85 is in the vertical axis direction (Z direction) with respect to the guide member 84 with the guide member 84 fitted in the hollow portion. It is free to move.

  Further, two pin-shaped moving elements 851 projecting inward from the inner wall of the moving member 85 (hollow portion thereof) are provided at positions shifted from each other by 180 ° with the central axis of the moving member 85 as the center. Specifically, a small diameter hole penetrating from the outer wall to the inner wall of the moving member 85 is formed corresponding to each moving element 851, and each moving element 851 is movably fitted in the corresponding small diameter hole. Further, the end on the outer wall side of the moving member 85 among both ends of each moving element 851 is in contact with a leaf spring that urges the moving element 851. That is, the lower end portion of the leaf spring is fixed to the outer wall of the moving member 85, while the upper end of the leaf spring is a free end, and the mover 851 is in contact with the free end. The moving element 851 is urged inward (to the guide member 84 side) by the leaf spring.

  The moving element 851 of the moving member 85 configured as described above is pressed against the groove C by the urging force of the leaf spring while fitting into the groove C of the guide member 84. In this state, the moving member 85 moves in the vertical axis direction (Z direction) with respect to the guide member 84. At this time, the movement of the moving member 85 is guided by the guide member 84 so that the moving element 851 moves along the groove C. As a result, the moving member 85 linearly descends in the vertical axis direction (Z direction), and when it moves back and forth in the vertical axis direction (Z direction), the guide member 84 guides the vertical axis (Z axis). ) Rotate around.

  A nozzle pressing member 86 is fixed to the lower end of the moving member 85 in the vertical axis direction (Z direction) via a link member 87. The nozzle pressing member 86 is a rod-shaped member extending in the vertical axis direction (Z direction) and moves integrally with the moving member 85. Therefore, in addition to the operation of lowering in the vertical axis direction (Z direction) integrally with the moving member 85, the operation of rotating around the vertical axis (Z axis) integrally with the moving member 85 can be executed. Then, one of the eight suction nozzles 83 is selectively pushed down in the vertical axis direction (Z direction) by the nozzle pressing member 86 to be used for component suction.

  That is, each of the eight suction nozzles 83 is pulled upward in the vertical axis direction (+ Z direction) by the urging force of the urging member 82 when not used for component suction, whereas when used for component suction, The pressing member 86 is pushed down in the vertical axis direction (−Z direction) against the urging force. At this time, the nozzle pressing member 86 rotates about the vertical axis (Z axis) by rotating about the vertical axis (Z axis) and corresponding to each of the eight suction nozzles 83 above the eight suction nozzles 83. The nozzles are selectively moved to a position above the eight nozzles aligned (here, a position directly above the vertical axis direction (Z direction) of each suction nozzle 83). Then, the nozzle pressing member 86 descends from the nozzle upper position corresponding to the selected suction nozzle 83 and pushes down the suction nozzle 83. The suction nozzle 83 thus pushed down sucks the component at its tip. Incidentally, in FIG. 2, one of the eight suction nozzles 83 included in the third mounting head 8 from the left side of these drawings is pushed down.

  The above is the configuration of the mounting head 8. Next, two types of drive mechanisms (Z-axis drive mechanism 62 and R-axis drive mechanism 63) that drive the mounting head 8 will be described. As described above, in the mounting head 8, when the moving member 85 moves integrally with the nozzle pressing member 86 in the vertical axis direction (Z direction), the pressing operation of the suction nozzle 83 is executed. Therefore, the Z-axis drive mechanism 62 is provided as means for driving the moving member 85 in the vertical axis direction (Z direction). The Z-axis drive mechanism 62 is provided between the support frame 61 and the mounting head 8 and is supported by two arms 61b and 61c extending forward (+ Y direction) from the support frame 61.

  More specifically, in the Z-axis drive mechanism 62, the ball screw shaft 621 extending in the vertical axis direction (Z direction) and the ball screw shaft 621 are rotationally driven by being disposed above the ball screw shaft 621 in the vertical axis direction (Z direction). A Z-axis motor 622 and a movable member 623 screwed onto the ball screw shaft 621 are provided. Then, the Z-axis motor 622 rotates the ball screw shaft 621 forward and backward about the vertical axis (Z axis), so that the movable member 623 moves up and down in the vertical axis direction (Z direction). The movable member 623 supports a link member 87 that couples the moving member 85 and the nozzle pressing member 86 via a ball bearing 88. Thus, the movable member 623 supports the moving member 85, the nozzle pressing member 86, and the link member 87 so as to be rotatable about the vertical axis (Z axis), and the movable member 623 moves up and down in the vertical axis direction (Z direction). Accordingly, the moving member 85, the nozzle pressing member 86, the ball bearing 88, and the link member 87 move up and down in the vertical axis direction (Z direction). As described above, the moving member 85 and the nozzle pressing member 86 can be integrally moved in the vertical axis direction (Z direction) by the Z-axis drive mechanism 62.

  Further, as described above, the mounting head 8 is configured such that the shaft 81 rotates around the vertical axis (Z axis) with the moving member 85, the link member 87, the nozzle pressing member 86, and the plurality of suction nozzles 83. ing. Therefore, the R-axis drive mechanism 63 is provided to rotationally drive the shaft 81 about the vertical axis (Z axis). Specifically, the R-axis drive mechanism 63 includes an R-axis motor 631 attached to the upper end of the shaft 81, and the shaft 81 is rotated about the vertical axis (Z axis) by the rotational driving force of the R-axis motor 631. Reverse rotation is possible.

  In the head unit 6, four mounting heads 8 are arranged in a line in the horizontal direction (X direction), and a Z-axis driving mechanism 62 and an R-axis driving mechanism 63 are arranged for each of the mounting heads 8. Has been. At this time, the four Z-axis drive mechanisms 62 are also arranged in a row in the horizontal direction (X direction), and the four R-axis drive mechanisms 63 are also arranged in a row in the horizontal direction (X direction). Moreover, the four rows of the Z-axis drive mechanisms 62 and the four rows of the R-axis drive mechanisms 63 are arranged in parallel with each other when viewed from the vertical axis direction (Z direction). In such a configuration, each component (mounting head 8, Z-axis drive mechanism 62, R-axis drive mechanism 63) of the component mounting apparatus 1 can be arranged in a compact manner, and the component mounting apparatus 1 can be downsized. In particular, the layout is such that four rows of Z-axis drive mechanisms 62 and four R-axis drive mechanisms 63 are arranged in parallel (one Z-axis drive mechanism 62 and one R-axis drive mechanism 63 are arranged side by side. The distance between the mounting heads 8 adjacent to each other in the horizontal direction (X direction), as compared with the series arrangement arranged side by side, and thus the nozzle groups (groups of eight suction nozzles 83) included in each mounting head 8. The distance between them can be reduced.

  Next, the configuration and operation of an air pressure supply mechanism for supplying air pressure to each nozzle 83 will be described with reference to FIGS. FIG. 6 is a diagram schematically showing a connection relationship between a flow hole provided in the nozzle and a communication hole provided in the holding portion. Each nozzle 83 extends in the vertical axis direction (Z direction) as shown in FIG. 5, and an air pressure introduction passage 831 is provided in the nozzle along the axis of the nozzle 83, and its lower end is the nozzle tip. It extends to the part. As shown in FIG. 6, two flow holes FH <b> 1 and FH <b> 2 extend from the side surface of the nozzle 83 to the air pressure introduction passage 831 in the horizontal direction. In the first embodiment, the flow holes FH1, FH2 are connected to the upper end portion of the air pressure introduction passage 831, and are arranged in a row in the vertical direction so that the flow holes FH1 are positioned below the flow holes FH2 in the vertical axis direction. It is installed.

  The nozzle 83 configured as described above is moved up and down in the vertical axis direction (Z direction) while sliding the nozzle side surface along the inner peripheral surface of the holding hole 512. In addition, as the nozzles 83 are moved up and down, two types of nozzles 51 are provided on the side surface of the nozzle holder 51 in order to supply negative pressure or positive pressure to the air pressure introduction passage 831 through the flow holes FH1 and FH2, as will be described later. One set of communication holes CH1 and CH2 is communicated with each holding hole 512. Similarly to the flow holes FH1 and FH2, the communication holes CH1 are connected to the holding holes 512 in the vertical axis direction (Z direction) from the communication holes CH2. Are also arranged in a single line so as to be positioned below. As described above, in the first embodiment, the nozzle 83 is provided with the two flow holes FH1 and FH2, and the nozzle holder 51 is provided with the two communication holes CH1 and CH2. In relation to the up-and-down movement, the following relationship is set.

  Here, the above relationship will be described by focusing on one nozzle 83. When the nozzle 83 is moved up to the rising end, as shown in FIG. 6A, the upper flow hole FH2 is completely opposed to the upper communication hole CH2, and the upper communication hole CH2 is air-pressured via the upper flow hole FH2. It is connected to the introduction passage 831 and can supply air pressure. On the other hand, the lower flow hole FH1 is blocked by the inner peripheral surface of the holding hole 512, and the lower communication hole CH1 is blocked by the side surface of the nozzle 83, so that air pressure is supplied using the lower communication hole CH1. Absent. Note that the position of the nozzle 83 relative to the nozzle holder 51 at this time is referred to as a “rising end position”, which corresponds to the “second position” of the present invention.

  Further, when the nozzle 83 moves downward from the ascending end position, the opposing range of the upper flow hole FH2 with respect to the upper communication hole CH2 gradually narrows as the nozzle descends, but as shown in FIG. While the upper flow hole FH2 partially faces the communication hole CH2, the lower flow hole FH1 partially faces the lower communication hole CH1. Therefore, at this position, air pressure can be supplied through both communication holes CH1 and CH2. Then, as described below, when the nozzle 83 is further lowered, the air pressure supply path, that is, the air circuit is further switched. Thus, the position shown in FIG. 5B functions as a switching position of the air circuit. In this specification, the position of the nozzle 83 with respect to the nozzle holder 51 at this time is referred to as a “circuit switching position”. This corresponds to the “third position” of the present invention.

  Further, when the nozzle 83 moves downward from the circuit switching position and moves to a height position (position in the vertical axis direction) where the component is sucked from the component supply unit 4 and the component is placed on the substrate 3, the same figure ( As shown in c) and (d), both the flow holes FH1, FH2 are completely opposed to the lower communication hole CH1, and the lower communication hole CH1 is connected to the air pressure introduction passage 831 via the flow holes FH1, FH2. Can be supplied. On the other hand, the upper communication hole CH2 is blocked by the side surface of the nozzle 83, and air pressure is not supplied using the upper communication hole CH2. The position of the nozzle 83 relative to the nozzle holder 51 when performing component suction as shown in FIG. 10C is referred to as a “component suction position”, while when mounting the component as shown in FIG. The position of the nozzle 83 with respect to the nozzle holder 51 is referred to as a “component mounting position”, which corresponds to the “first position” of the present invention. In addition, since the component suction position and the component mounting position may be slightly different in the vertical axis direction (Z direction) depending on the component size and the like, in this embodiment, the lower communication hole CH1 extends in the vertical axis direction. It has a long hole shape. Further, the length in the vertical axis direction can be set based on the dimension of the maximum component that can be mounted by the component mounting apparatus 1. Further, as described above, the distance between the flow holes FH1 and FH2 in the vertical axis direction (Z direction) in order to make the flow holes FH1 and FH2 completely face the lower communication hole CH1 at the component suction position and the component mounting position. It is desirable to have a long hole shape longer than that.

  Here, the case where one nozzle 83 is lowered from the rising end to the component suction position or the component mounting position has been described as an example. In accordance with the position of the nozzle 83 with respect to 51, the connection relationship between the communication holes CH1, CH2 and the flow holes FH1, FH2 is in the reverse order of the descending order.

  In the first embodiment, the eight nozzles 83 are alternately moved up and down one by one with respect to one nozzle holder 51. Therefore, the nozzle holder 51 has eight communication holes CH1 and eight communication holes CH2. And are provided. Therefore, in order to be able to supply air pressure to the nozzle side through the communication holes CH1 and CH2, as shown in FIG. 4, two annular grooves LT1 and LT2 are provided on the outer peripheral surface of the nozzle holder 51. Yes. That is, the groove LT1 is provided on the outer peripheral surface of the nozzle holder 51 so as to connect the eight lower communication holes CH1, and the groove LT2 connects the eight upper communication holes CH2 above the groove LT1. It is provided on the outer peripheral surface of the nozzle holder 51. Then, by inserting the nozzle holder 51 into the through hole 521 of the cylindrical member 52, an annular space sandwiched between the inner peripheral surface of the through hole 521 and the lower groove LT1 is formed, and the annular space is interposed therebetween. Thus, air pressure can be supplied to each lower communication hole CH1. In this regard, the same applies to the upper groove LT2. That is, air pressure can be supplied to each upper communication hole CH2 via an annular space formed by the inner peripheral surface of the through hole 521 and the upper groove LT2.

  The cylindrical member 52 is provided with two air pressure supply holes SH1 and SH2. These air pressure supply holes SH1 and SH2 face the annular grooves LT1 and LT2, respectively, when the nozzle holder 51 is inserted into the through hole 521, and the cylindrical member 52 is inserted into the through hole 61a1 of the arm 61a. Sometimes, they are arranged so as to be connected to the connection parts CP1 and CP2, respectively.

  As shown in FIG. 5, the connection portion CP1 of these two connection portions has a negative pressure source 531 that generates a negative pressure (P1-), a positive pressure source 532 that generates a positive pressure (P1 +), and a switching valve 533. An air pressure supply unit 53 provided with is connected. In this air pressure supply unit 53, a negative pressure source 531 and a positive pressure source 532 are connected to a switching valve 533, and the switching valve 533 is negative pressure in response to a switching command from a control unit (not shown) that controls the entire apparatus. (P1-) or positive pressure (P1 +) can be selectively supplied to the nozzle side. Therefore, as will be described below, the switching valve 533 is switched so as to supply a positive pressure when component mounting is performed, while the switching valve 533 is switched so as to supply a negative pressure otherwise (in FIG. 5). The negative pressure supply state is illustrated). On the other hand, a pneumatic pressure supply unit 54 including a negative pressure source 541 that generates a negative pressure (P2-) is connected to the connection unit CP2, and the negative pressure (P2-) is always supplied via the pneumatic pressure supply hole SH2. It is supplied to the upper communication hole CH2.

  Next, the air pressure switching operation in the apparatus 1 configured as described above will be described with reference to FIG. 6 in association with the component mounting operation (mainly the lifting and lowering operation of the nozzle 83). The component mounting apparatus 1 shown in FIG. 1 stores a production program given from an external control device (not shown) such as a server-PC in the storage unit of the control unit, and the control unit reads the production program from the storage unit, Each part of the apparatus is driven and controlled based on the production program, and the nozzle 83 is moved up and down as follows, and the air supply path, that is, the air circuit switching operation is performed in accordance with the movement up and down. Here, in order to facilitate understanding of the air circuit switching operation related to the up-and-down movement of the nozzle 83, the selected suction nozzle among the eight suction nozzles 83 mounted on the mounting head 8 is used. A description will be given focusing on the operation according to 83.

  The head unit 6 is moved above the component supply unit 4 so that the suction nozzle 83 of the mounting head 8 is positioned immediately above the component fed out to the component suction position of the component supply unit 4. At this time, all the suction nozzles 83 are moved to the ascending end position as shown in FIG. 6A, and the communication hole CH2 is communicated with the flow hole FH2 so that a predetermined negative pressure ( P2-) is supplied to the air pressure introduction passage 831. Note that the switching valve 533 of the air pressure supply unit 53 is in a negative pressure supply state, and communicates so as to satisfy a negative pressure (P1-) that is larger than the air pressure supply unit 54, that is, | P1- |> | P2- |. Although negative pressure supply to the hole CH1 is executed, since the communication hole CH1 is blocked by the side surface of the nozzle 83, negative pressure supply from the air pressure supply unit 53 to the air pressure introduction passage 831 is not performed.

  Then, when the suction nozzle 83 starts to descend to hold the components and descends to the circuit switching position, the communication hole CH1 and the flow hole FH1 flow while the communication hole CH2 and the flow hole FH2 remain connected. Then, negative pressure is supplied to the air pressure introduction passage 831 from two places, the air pressure supply unit 53 and the air pressure supply unit 54 (FIG. 6B). However, when the suction nozzle 83 is lowered from the circuit switching position, the flow hole FH2 moves downward as the nozzle is lowered, the communication hole CH2 is blocked by the nozzle side surface, and the negative pressure to the air pressure introduction passage 831 by the air pressure supply unit 54 is reduced. Pressure supply is stopped. Therefore, only the negative pressure from the air pressure supply unit 53 is supplied to the air pressure introduction passage 831 through the flow hole FH1.

  Further, when the suction nozzle 83 is further lowered and moved to the component suction position, as shown in FIG. 6C, not only the flow hole FH1 but also the flow hole FH2 is opposed to the communication hole CH1 and communicated. Is done. As a result, the total cross-sectional area (effective cross-sectional area) of each of the flow holes FH1 and FH2 increases, and the negative pressure at the time of component adsorption is supplied to the air pressure introduction passage 831 of the nozzle 83 all at once. It is done more reliably.

  When the component suction is completed as described above, the suction nozzle 83 is raised to the original rising end position. During this upward movement, a switching operation opposite to the air circuit switching during the downward movement is executed. Therefore, even during the upward movement, the negative pressure is supplied to the air pressure introduction passage 831 by the air pressure supply unit 53 and / or the air pressure supply unit 54, whereby the suction nozzle 83 remains in the state where the component is sucked and held by the nozzle tip. Move up. Then, at the rising end position, the state in which the component is sucked and held by the negative pressure supply by the air pressure supply unit 54 is maintained, and the apparatus stands by at the rising end position until the component suction by the other suction nozzle 83 is completed.

  Next, when the component suction by each suction nozzle 83 is completed, the head unit 6 is moved from above the component supply unit 4 to above the component mounting position of the substrate 3. At this time, the head unit 6 passes above the component recognition camera 7, and the components held by the suction nozzles 83 are imaged from the lower side by the component recognition camera 7, and the components are recognized by a conventionally known method. Done.

  When the positioning of the head unit 6 at the component mounting position is completed, the suction nozzle 83 starts to descend for component mounting. As described above, even when descending for mounting components on the board 3, the air circuit is switched in accordance with the descending operation of the suction nozzle 83 as in the descending operation for attracting components. Since the negative pressure is supplied to the air pressure introduction passage 831 by the air pressure supply unit 53 and / or the air pressure supply unit 54, the suction nozzle 83 descends to the component mounting position while the component is sucked and held at the tip of the nozzle. Accordingly, it is possible to reliably prevent the component from dropping from the suction nozzle 83 during the downward movement.

  When the suction nozzle 83 reaches the component mounting position in this manner, the air pressure supply unit 53 switches the switching valve 533 to the positive pressure supply side in accordance with an operation command from the control unit, and positive pressure is passed through the communication hole CH1, the flow holes FH1, and FH2. Then, the air is supplied to the air pressure introduction passage 831 and blown from the tip of the nozzle. As a result, the component sucked and held by the nozzle 83 can be easily detached from the tip of the nozzle, and the component can be mounted at a desired component mounting position. After the component mounting is completed, the suction nozzle 83 is moved up and moved to the rising end position via the circuit switching position. The switching valve 533 is returned to the negative pressure supply side in accordance with an operation command from the control unit immediately before starting the upward movement or before reaching the circuit switching position, and negative pressure is supplied to the air pressure introduction passage 831. In this embodiment, the air pressure introduction passage 831 is returned to the negative pressure after the components are mounted, but the air pressure introduction passage 831 may be configured to release the atmospheric pressure.

  When component mounting is completed by these operations, the above-described series of operations are repeated in order to mount the next component on the board 3.

  As described above, in the first embodiment, the suction nozzle 83 is provided with the two flow holes FH1 and FH2, while the nozzle holder 51 that holds the suction nozzle 83 is provided with the two communication holes CH1 and CH2. The communication connection between the communication holes CH1 and CH2 and the flow holes FH1 and FH2 is switched by the nozzle descending to the component adsorption position and the nozzle rising to the ascending end, and the tip of the adsorption nozzle 83 is connected via the air pressure introduction passage 831. The negative pressure supplied is adjusted. Therefore, it is possible to switch the air pressure supplied to the suction nozzle 83 with a simple configuration compared to the prior art.

  Moreover, in the said embodiment, since the pneumatic pressure supply parts 53 and 54 which supply mutually different negative pressure are provided and the magnitude | size of the negative pressure supplied to the adsorption nozzle 83 is changed according to the raising / lowering movement of the nozzle 83, it is adsorbed. The component can be moved to the substrate side without dropping the component from the nozzle 83. Moreover, in the first embodiment, the negative pressure (P1-) supplied from the air pressure supply unit 53 and the negative pressure (P2-) supplied from the air pressure supply unit 54 are values suitable for component adsorption and component conveyance, respectively. Therefore, it is possible to reliably perform the component suction and to prevent the component from dropping off from the nozzle tip during the movement of the nozzle 83 or the head unit 6.

  Further, since the communication hole CH1 is configured to have a long hole shape extending in the vertical axis direction (Z direction), a range in which negative pressure can be supplied through the communication hole CH1, that is, a component suction position and a component mounting position. Is expanded in the vertical axis direction (Z direction). For this reason, even if the variation attracts components due to the height dimensions of various components and the height position mounted on the substrate 3 fluctuates in the vertical axis direction, the components can be attracted and held by the suction nozzle 83 without any trouble. It has become.

  Further, in the first embodiment, as shown in FIG. 4, each holding hole 512 is provided with flow holes FH1 and FH2 on the opposite side of the recess 511, and the air flow supply part is communicated with the flow hole FH1 by the annular groove LT1. 53 is configured to be able to supply air pressure (negative pressure and positive pressure) to all the suction nozzles 83 via the air pressure supply hole SH1, and the flow hole FH2 is communicated with LT2 from the air pressure supply unit 54 via the air pressure supply hole SH2. Thus, air pressure (negative pressure) can be supplied to all the suction nozzles 83. Therefore, even if there are a plurality of nozzles 83 as in the present embodiment, by providing one each of the air pressure supply unit 53 and the air pressure supply unit 54, each nozzle 83 has a simple structure according to the nozzle position. Air pressure can be supplied.

  Thus, in the first embodiment, the flow holes FH1 and FH2 correspond to the “first flow hole” and the “second flow hole” of the present invention, respectively, and the communication holes CH1 and CH2 respectively of the present invention. This corresponds to “first communication hole” and “second communication hole”. The air pressure supply holes SH1 and SH2 correspond to the “first air pressure supply hole” and the “second air pressure supply hole” of the present invention, respectively. Further, the Z-axis drive mechanism 62 and the urging member 82 function as the “nozzle moving mechanism” of the present invention. The nozzle holder 51 corresponds to the “holding portion” of the present invention. Further, the positive pressure (P1 +), the negative pressure (P1-), and the negative pressure (P2-) are respectively “first positive pressure”, “first negative pressure”, and “second negative pressure” of the present invention. Equivalent to. The switching valve 533 corresponds to the “first switching means” of the present invention. Furthermore, the annular grooves LT1 and LT2 correspond to the “first annular groove” and the “second annular groove” of the present invention, respectively.

  The present invention is not limited to the above-described embodiment, and various modifications can be made to the above-described one without departing from the spirit of the present invention. For example, in the first embodiment, the first flow hole FH1 and the first communication hole CH1 are disposed below the second flow hole FH2 and the second communication hole CH2, respectively. For example, as shown in FIG. 7, the upper and lower relations may be switched and arranged (second embodiment). However, at the component suction position in the second embodiment, only the flow hole FH1 is opposed to the communication hole CH1, and the other flow hole FH2 is the inner peripheral surface of the holding hole 512, as shown in FIG. And is not communicated with any of the communication holes CH1 and CH2. Although not shown in the figure, when the suction nozzle 83 is moved to the component mounting position, it is the same as when the suction nozzle 83 is moved to the component suction position ((c) in the same figure). This also applies to the third to fifth embodiments described below.

  Further, in the first embodiment and the second embodiment, two flow holes FH1 and FH2 are provided in the suction nozzle 83, but the number of flow holes is not limited to this and is arbitrary. For example, as shown in FIG. 8, you may comprise only the flow hole FH of the long hole shape extended to an up-down-axis direction (Z direction) (3rd Embodiment). In the third embodiment, the opening length of the flow hole FH in the vertical axis direction on the side facing the inner peripheral surface of the holding hole 512 is longer than the separation interval of the communication holes CH1 and CH2, as shown in FIG. As shown, when the suction nozzle 83 is moved to the circuit switching position, the flow hole FH communicates with the communication holes CH1 and CH2 simultaneously across the communication holes CH1 and CH2. As a result, the negative pressure is always supplied to the nozzle 83 even while the nozzle 83 moves between the rising end position, the component suction position, and the component mounting position. Therefore, it is possible to reliably prevent the parts from falling. Further, the manufacturing cost can be reduced by setting the number of flow holes FH to the minimum number.

  In the above embodiment, the first flow hole FH1 and the second flow hole FH2 are arranged in a line in the vertical axis direction, and the first communication hole CH1 and the second communication hole CH2 are arranged in the vertical axis direction. Although arranged in a row, the arrangement relationship between the flow holes and the communication holes is not limited to this, and the communication hole side openings of the flow holes FH1 and FH2 (in FIGS. 6 to 8) as the nozzle 83 moves up and down. What is necessary is just to arrange | position so that the through-hole side opening (right side opening in FIGS. 6-8) of communication hole CH1 and communication hole CH2 may be located on the locus | trajectory which a left side opening moves.

  In the first to third embodiments, the flow holes FH1 and FH2 and the communication holes CH1 and CH2 are arranged on the same direction side (the left hand side in FIGS. 6 to 8) with respect to the suction nozzle 83. However, for example, as shown in FIG. 9, they may be disposed on opposite sides of the suction nozzle 83 (fourth embodiment). In the fourth embodiment, the flow holes FH1 and FH2 are provided at substantially the same position in the vertical axis direction (Z direction) and separated from each other in the circumferential direction around the vertical axis direction. When the suction nozzle 83 is moved to the component suction position, only the flow hole FH1 communicates with only the communication hole CH1 and the flow hole FH2 is blocked by the inner peripheral surface of the holding hole 512 as shown in FIG. It does not communicate with any communication hole.

  In the fourth embodiment configured as described above, the air pressure (negative pressure P1- and positive pressure P1 +) suitable for component suction and component mounting is in the direction corresponding to the formation position of the flow hole FH1 (right hand side in the figure). On the other hand, the air pressure (negative pressure P2-) suitable for parts conveyance is supplied from the direction corresponding to the formation position of the flow hole FH2 (the left hand side in the figure), and thus the air pressure supply direction is up and down. Different in the circumferential direction around the axial direction. Therefore, the pneumatic piping and the pneumatic supply source for supplying the pneumatic pressure to the nozzle holder 51 can be shifted around the nozzle, and the degree of freedom in layout can be increased. Further, as shown in the figure, since the flow holes FH1, FH2 are arranged at substantially the same position in the vertical axis direction, the interval between the flow holes FH1, FH2 is narrowed in the vertical axis direction (Z direction), and the vertical axis direction In addition, the nozzle holder 51 can be reduced in size. Furthermore, the fitting range between the nozzle 83 and the nozzle holder 51 is narrowed in accordance with the narrowing of the interval, so that fitting accuracy can be easily obtained and the manufacturing cost can be reduced.

  In the fourth embodiment, the flow holes FH1 and FH2 are arranged at substantially the same position in the vertical axis direction, but the communication holes CH1 and CH2 are replaced with the flow holes FH1 and FH2 as in the fourth embodiment. You may comprise (5th Embodiment). That is, as shown in FIG. 10, the communication holes CH <b> 1 and CH <b> 2 may be provided in the nozzle holder 51 so as to be separated from each other in the circumferential direction around the vertical axis direction and so that the hole centers are substantially at the same position in the vertical axis direction. Good. Also in this case, since the supply direction of the air pressure through the communication holes CH1 and CH2 is different in the circumferential direction around the vertical axis direction, the pneumatic piping for supplying the air pressure to the nozzle holder 51 as in the fourth embodiment. The air pressure supply source and the like can be shifted around the nozzle, and the degree of layout freedom can be increased.

  As already mentioned, the relationship between the first negative pressure and the second negative pressure is arbitrary. However, in the above embodiment, it is important to make sure that the parts are sucked | P1- |> The relationship of | P2- | is satisfied. In other words, in an apparatus that moves a nozzle that sucks a component with a nozzle tip at a relatively low speed, the suction force required when moving the nozzle does not require the suction force that is required at the start of component suction. It is based on. On the other hand, in order to increase the speed of the device, it is necessary to set the maximum moving speed of the nozzle high, and the inertial force acting on the parts adsorbed to the nozzle tip at the moment of acceleration / deceleration or stop of the nozzle is large. Become. In such an apparatus, the second negative pressure | P2- | for overcoming the inertial force must be larger than the first negative pressure | P1- | for overcoming the frictional force during adsorption. Such a situation is common to all conventionally known surface mounting apparatuses. In particular, in the mounting head 8 of the above-described embodiment, for example, as shown in FIG. 2, eight nozzles 83 are arranged side by side in a rotary shape. Therefore, when the mounting radius increases to increase the rotary radius and the rotation acceleration / deceleration of the mounting head 8 increases, the configuration of | P1- | <| P2- | is satisfied. Is desirable (sixth embodiment).

  Further, in the above embodiment, the switching valve (in the above embodiment, a single switching valve 533) having a plurality of nozzles 83 and switching the supply of positive pressure or negative pressure to each nozzle 83 is smaller than the number of nozzles. Is going. In this case, if the suction force required when moving the nozzle and the suction force at the start of component suction should be made comparable, a negative pressure generator having a single negative pressure source (For example, refer to FIG. 19 described later), a negative pressure may be supplied to each nozzle 83, that is, a relationship of | P1- | = | P2- | may be satisfied (seventh embodiment). Form). In this case, as in the other embodiments described above, negative pressure is applied to all nozzles 83 during component adsorption and component conveyance, while switching between negative pressure and positive pressure is performed as follows when components are mounted on the board. be able to. That is, if the switching valve 533 is used to switch the negative pressure from the negative pressure to the positive pressure for mounting by the nozzle 83 that is lowered, the negative pressure is applied to the nozzle 83 that is at the raised position. The nozzle itself may function as a part of a spool valve that switches an air circuit for applying a negative pressure to a certain nozzle 83 and an air circuit communicating with the switching valve 533 at the lowered position.

  Further, if the switching valve 533 is used to switch the negative pressure from the negative pressure to the positive pressure for mounting at the nozzle 83 that is lowered, the negative pressure is applied to the nozzle 83 at the raised position. The nozzle itself may function as a part of the spool valve, and an air circuit that guides the negative pressure and an air circuit that communicates with the switching valve 533 at the lowered position.

  In the above-described embodiment, the air pressure supply unit 54 is configured only by the negative pressure source 541. However, similarly to the air pressure supply unit 53, the air pressure supply unit 54 is further provided with a positive pressure source and a switching valve to provide not only negative pressure but also positive pressure ( P2 +) may also be selectively supplied. In the apparatus configured as described above, the negative pressure (P2-) or the positive pressure (P2 +) can be selectively supplied to the holding hole 512 through the second communication hole CH2. For this reason, for example, when the suction nozzle 83 is moved to the rising end position without sucking parts, the pressure applied to the nozzle 83 is switched from the negative pressure (P2−) to the positive pressure (P2 +), so that the nozzle is air purged. The air pressure introduction passage 831 and the nozzle tip 83 can be cleaned with air. Also, considering that the air pressure supply of positive pressure (P1 +) is used as an air blow for parts removal, the absolute value of the positive pressure for air blow (P1 +) is greater than the absolute value of the positive pressure for air purge (P2 +) It is desirable to make it small. This is because when the component is mounted by lowering the suction nozzle 83 by the Z-axis drive mechanism 62, it is not necessary to unnecessarily increase the positive pressure of the air blow when the component is detached from the nozzle 83. In addition, there is an effect that the positive pressure supply capability of the positive pressure source 532 can be reduced.

  The above embodiment is applied to a so-called rotary type (or revolver type) mounting head 8 in which eight suction nozzles 83 are arranged circumferentially, but the scope of application of the present invention is limited to this. For example, the present invention can be applied to a component mounting apparatus that performs component mounting by a mounting head equipped with a plurality of suction nozzles 83 by another method. Further, the present invention can be applied to a component mounting apparatus that supplies air pressure while switching the suction nozzles 83.

  FIG. 11 is a side view showing an eighth embodiment of the component mounting apparatus according to the present invention. In the eighth embodiment, similarly to the first embodiment, the substrate transport mechanism 2 (see FIG. 1) is arranged on the base 11, and the front (+ Y) side and the rear (−Y) of the substrate transport mechanism 2 are arranged. ) Side, the above-described component supply unit 4 (see FIG. 1) is arranged. Then, after the substrate 3 is transported to a predetermined mounting work position by the substrate transport mechanism 2 and fixed by a holding device (not shown), the head unit 6 is moved over the predetermined range of the base 11 by the head moving mechanism in the X-axis direction and Y-direction. While being moved in the axial direction, the electronic component sucked by the suction nozzle 830 in the component supply unit 4 is transported to the substrate 3 and transferred to the mounting position designated by the user. However, in the eighth embodiment, unlike the first embodiment, the head unit 6 has eight suction nozzles 83 arranged in a line in the horizontal direction (X direction). Hereinafter, the configuration and operation of the head unit 6 will be mainly described with reference to FIGS.

  FIG. 12 is a front view of the head unit, and shows a state in which the front cover is removed. FIG. 13 is a partial cross-sectional view of the head unit shown in FIG. In the eighth embodiment, the head unit 6 has a support frame 61 supported so as to be movable along the X axis with respect to a mounting head support member 91 extending in the X axis direction. Side plates 64 are fixed to both sides of the support plate 61A constituting the front (+ Y) portion of the support frame 61 (note that only the (−X) side plate is shown in FIG. 12). ). A top plate 65 is fixed to the upper end portion of the support plate 61A, and a bracket 66 corresponding to the “holding portion” of the present invention is fixed to the lower end portion.

  In this head unit 6, as shown in FIG. 11, eight mounting heads 800 are arranged in a line in the X-axis direction. These mounting heads 800 have the same configuration. In each mounting head 800, a nozzle shaft 810 extending in the vertical axis direction (Z direction) can be rotated by the bearing unit 820 and slid in the vertical axis direction. It is supported movably. That is, eight bearing units 820 are arranged and fixed in a row in the X-axis direction at equal intervals with respect to the front (+ Y) surface of the support plate 61A. In each bearing unit 820, as shown in FIG. 13, a nozzle shaft guide shaft 822 is disposed inside the bearing unit main body 821 so as to be rotatable around the vertical axis. In addition, a spline hole is provided in the center of the nozzle shaft guide shaft 822 so as to penetrate in the vertical axis direction, and the nozzle shaft 810 is slidably fitted in the vertical axis direction with respect to the spline hole. While being inserted, it is supported.

  The lower end portion of each nozzle shaft guide shaft 822 extends below the lower end surface of the bearing unit main body 821, and a driven gear 841 is attached to the lower end portion. In this way, the eight driven gears 841 are arranged in a line in the left-right direction (X-axis direction). The nozzle shaft 810 is rotated in the R-axis direction by transmitting the driving force of the R-axis motor 842 to each driven gear 841 and rotating the nozzle shaft guide shaft 822. That is, the nozzle rotation mechanism that rotates the nozzle shaft 810 on which the suction nozzle 830 is mounted in the R-axis direction is configured as follows. The R-axis motor 842 is attached to the side plate 64 with a motor stay 843. Further, a pinion 844 is attached to the lower end portion of the output shaft of the R-axis motor 842, and a driven gear is connected via a rack 846 slidably supported at both ends by a rack guide 845 in the left-right direction (X-axis direction). 841 is driven to rotate. As a result, the suction nozzle 830 attached to the lower end of the nozzle shaft 810 of the mounting head 800 that has entered the component mounting operation is positioned at a rotation angle that matches the component mounting direction set for each mounting position.

  The top plate 65 is provided with one nozzle moving mechanism drive source 861 above the eight nozzle shafts 810. In this embodiment, a linear motor is used as the drive source 861, and the lower end portion of the output shaft 862 of each linear motor 861 is screwed to the coupling 863, and the coupling 863 is the upper end portion of the nozzle shaft 810. Is rotatably supported via a bearing 864. Thus, the coupling 863 has a function of rotatably connecting the nozzle shaft 810 to the output shaft 862 of the linear motor 861 that is not rotatable and moves up and down. The configuration of the nozzle drive mechanism is not limited to this, and a configuration in which the output shaft 862 cannot rotate and moves up and down, for example, a nozzle drive mechanism using a hollow motor, a ball nut and a ball screw mechanism is employed. May be.

  Further, the bracket 66 supports the lower end portion of the nozzle shaft 810 arranged in parallel in the left-right direction (X-axis direction) so as to be rotatable and slidable up and down. Hereinafter, the structure of the bracket 66 will be described in detail with reference to FIGS.

  FIG. 14 is a partial cross-sectional view showing the structure of the bracket. 15 is a cross-sectional view taken along line AA in FIG. 14, FIG. 16 is a cross-sectional view taken along line BB in FIG. 15, and FIG. 17 is a cross-sectional view taken along line CC in FIG. FIG. The bracket 66 is provided with eight holding holes in a straight line at regular intervals in the left-right direction (X-axis direction) and penetrating in the vertical axis direction (Z-direction). One lower end of the nozzle shaft 810 is inserted into each holding hole. More specifically, the nozzle shaft 810 is held so as to be rotatable in the vertical axis direction and movable in the vertical direction while sliding the lower end side surface of the nozzle shaft 810 along the inner peripheral surface of the holding hole.

  Further, in the bracket 66, as shown in FIGS. 14 and 15, at the first height position P1 in the vertical axis direction (Z direction), the first communication in which the holding hole is widened in an annular shape in the horizontal direction. One chamber portion CH1a is provided for each of the eight holding holes. Further, at the upper side of the first height position P1, that is, at the second height position P2, eight second communication chamber portions CH2a are provided in the same manner as the first communication chamber portion CH1a. . Thus, two types of communication chamber portions CH1a and CH2a are provided for each holding hole, and communicate with the holding holes at different height positions P1 and P2, respectively.

  Further, inside the bracket 66, a communication hole CH1b that communicates the first communication chamber portion CH1a with each other at the first height position P1 is provided. The (−X) side end portion of the communication hole CH1b extends to the (−X) side end surface of the bracket 66 as shown in FIG. On the other hand, the communication hole CH2b is provided in the second height position P2 as well. That is, as shown in FIG. 17, the communication hole CH2b communicates with the second communication chamber portion CH2a, and its (−X) side end extends to the (−X) side end surface of the bracket 66. Yes.

  FIG. 18 is a diagram illustrating a connection state of the negative pressure generator and the switching valve with respect to the communication hole. Of the communication holes configured as described above, the (−X) side end of the communication hole CH1b is connected to the switching valve 55, and in response to a switching command from a control unit (not shown) that controls the entire apparatus. When the switching valve 55 switches the air circuit, it communicates with the first negative pressure source 571 of the negative pressure generator 57 via the atmosphere or the negative pressure pipe 561 according to the switching. In the figure, the (−X) side end of the communication hole CH1b is connected to the first negative pressure source 571 via the switching valve 55 and the negative pressure pipe 561, and in this case, the first negative pressure A negative pressure (P1-) is supplied from the source 571 to the holding hole through the first communication chamber portion CH1a. Further, instead of opening to the atmosphere, a positive pressure (P1 +) may be supplied by connecting to a positive pressure source as in the first embodiment.

  Further, the (−X) side end of the communication hole CH <b> 1 b is communicated with the second negative pressure source 572 of the negative pressure generating device 57 via the negative pressure pipe 562. For this reason, negative pressure (P2-) is supplied from the second negative pressure source 572 to the holding hole via the second communication chamber portion CH2a.

  As described above, two types of negative pressure (P1-), (P2-), air and negative pressure (P2-) are always supplied to each holding hole in accordance with switching of the switching valve 55. Yes. Then, one lower end of each of the eight nozzle shafts 810 is inserted into each of the holding holes, and can rotate while sliding along the inner peripheral surface of the holding hole, and can move in the vertical axis direction. Is retained. A suction nozzle 830 is attached to the tip of the lower end of each nozzle shaft 810. Inside the suction nozzle 830, a through hole (not shown) is provided along the nozzle axis to the nozzle tip, but at the lower end of each nozzle shaft 810 so as to communicate with the through hole. The air pressure introduction passage 811 is provided up to the suction nozzle 830. Thus, the nozzle shaft 810 and the suction nozzle 830 are integrated to function as the “nozzle” of the present invention.

  Each nozzle shaft 810 has two flow holes FH1 and FH2 extending horizontally from the side surface of the nozzle 83 to the air pressure introduction passage 811 in the same manner as the nozzle 83 of the first embodiment, and flows in the vertical axis direction. The holes FH1 are arranged in a row so as to be positioned below the flow holes FH2. Further, the formation mode (size and spacing in the vertical axis direction) of the flow holes FH1 and FH2 and the formation mode (size and spacing in the vertical axis direction) of the communication chamber portions CH1a and CH2a are the same as in the first embodiment. is there. Therefore, as in the first embodiment, the nozzle shaft 810 is switched by switching the communication connection between the communication chamber portions CH1a and CH2a and the flow holes FH1 and FH2 by lowering the nozzle to the component suction position and raising the nozzle to the rising end. The negative pressure supplied to the tip of the suction nozzle 83 through the air pressure introduction passage 811 and the through hole of the suction nozzle 830 can be adjusted. Therefore, it is possible to switch the air pressure supplied to the suction nozzle 830 with a simple configuration as compared with the prior art.

  Similarly to the first embodiment, the negative pressure generator 57 is provided with negative pressure sources 571 and 572 for generating different negative pressures, and the suction nozzle is changed according to the up-and-down movement of the nozzle (= nozzle shaft 810 + suction nozzle 830). Since the magnitude of the negative pressure supplied to 83 is changed, the component can be moved to the substrate side without dropping the component from the suction nozzle 83. Moreover, the negative pressure (P1-) supplied from the negative pressure source 571 and the negative pressure (P2-) supplied from the negative pressure source 572 are set to values suitable for component adsorption and component conveyance, respectively. Therefore, it is possible to reliably perform the component suction and to prevent the nozzle (= nozzle shaft 810 + suction nozzle 830) from moving up and down or rotating, or to prevent the component from dropping from the nozzle tip during the movement of the head unit 6. can do.

  Further, since the communication chamber portion CH1a is configured to extend in the vertical axis direction (Z direction), a range in which a negative pressure can be supplied through the communication chamber portion CH1a, that is, a component suction position and a component mounting position. Is expanded in the vertical axis direction (Z direction). For this reason, even if the variation attracts components due to the height dimensions of various components and the height position mounted on the substrate 3 fluctuates in the vertical axis direction, the components can be attracted and held by the suction nozzle 830 without any trouble. It has become.

  The communication chamber portions CH1a and CH2a are provided so as to surround the holding hole, and the communication holes CH1b and CH2b are configured to communicate with the holding hole via the communication chamber portions CH1a and CH2a. For this reason, even if the nozzle (= nozzle shaft 810 + adsorption nozzle 830) is rotated at any angle, the communication holes CH1b and CH2b are always in communication with the holding holes via the communication chamber portions CH1a and CH2a, and the above-described effects are obtained. . In an apparatus that does not rotate the nozzle (= nozzle shaft 810 + adsorption nozzle 830), the communication chamber portions CH1a and CH2a can be omitted and the communication holes CH1b and CH2b can be communicated with the holding holes.

  Further, in the eighth embodiment, similarly to the first embodiment, even if there are a plurality of mounting heads 800, the switching valve 55 and the negative pressure generating device 57 are each 1 less than the number of mounting heads 800. By providing them one by one, air pressure corresponding to the nozzle position can be supplied to each nozzle 830 with a simple structure.

  In the eighth embodiment, the first flow hole FH1 and the first communication chamber portion CH1a are disposed below the second flow hole FH2 and the second communication chamber portion CH2a, respectively. The arrangement relationship is not limited to the arrangement relationship, and the same arrangement relationship as described in the second embodiment (FIG. 7) to the fifth embodiment (FIG. 10) may be adopted.

  Also in the eighth embodiment, as already mentioned, the relationship between the first negative pressure and the second negative pressure is arbitrary, and as in the first embodiment, the component suction is ensured. The relationship of | P1- |> | P2- | may be satisfied with an emphasis on the above, and | P1- | <| P2 with an emphasis on nozzle movement speed, rapid acceleration, and stoppage You may comprise so that the relationship of-| may be satisfied.

  Further, in the eighth embodiment, since there are a plurality of nozzles 830 and the supply switching of the positive pressure or the negative pressure to each nozzle 830 is performed by one switching valve 55 that is smaller than the number of nozzles, for example in FIG. As shown, the negative pressure generator 57 is provided with a common negative pressure source 573, which is connected to the communication hole CH1b via the negative pressure pipe 561 and the switching valve 55, and via the negative pressure pipe 562. It may be configured to be connected to the communication hole CH2b (the ninth embodiment). With this configuration, the relationship | P1- | = | P2- | is satisfied. In this case, a negative pressure is applied to all nozzles 830 at the time of component adsorption and component transportation, while negative / positive pressure can be switched as follows when components are mounted on a substrate. That is, if the switching valve 55 is used to switch the negative pressure from the negative pressure to the positive pressure for mounting with the nozzle 830 being lowered, the negative pressure is applied to the nozzle 830 at the raised position. Air circuit (negative pressure source 573-negative pressure piping 561) and negative pressure source 573-negative pressure piping 561 including a switching valve 55 at the lowered position (negative pressure source 573-negative pressure piping 562-communication hole CH 2 b-communication chamber portion CH 2 a). The nozzle itself functions as a part of the spool valve that switches between the switching valve 55, the communication hole CH1b, and the communication chamber portion CH1a).

  Further, the present invention can be applied to a component mounting apparatus that supplies air pressure while switching the nozzles (the nozzle shaft 810 having the suction nozzle 830 attached to the lower end thereof).

  As described above, in the first to seventh embodiments, the number of switching valves 533 smaller than the number of suction nozzles 83 is used to switch the negative pressure / positive pressure to each nozzle 83, while those suction nozzles are switched. By providing the communication holes CH1 and CH2 over 83, different air circuits are formed, and the negative pressure supplied to the suction nozzle 83 is adjusted by switching the air circuit by the vertical movement of each suction nozzle 83. Also in the eighth embodiment and the ninth embodiment, each suction nozzle 830 is configured with a smaller number of switching valves 55 than the number of nozzles (the suction nozzle 830 is mounted on the lower end portion of the nozzle shaft 810). On the other hand, by providing the communication holes CH1b and CH2b straddling the nozzle shaft 810, different air circuits are formed, and the air circuits are switched by the vertical movement of each nozzle to the suction nozzle 830. The negative pressure to be supplied is adjusted. Thus, the negative pressure required for the suction nozzles 83 and 830 corresponds to the nozzle position, and the negative pressure can be switched using the vertical movement of the nozzle. Therefore, there is an advantage that the structure for performing the negative pressure switching is simple, hardly breaks down, and can be configured at low cost.

  Here, if attention is paid to the technical feature of switching the negative pressure by using the vertical movement of the nozzle, the component mounting apparatus may be configured as follows. That is, in the apparatus described in Patent Document 1, as described above, the positive pressure / negative pressure supply to the suction nozzle is controlled by providing the suction nozzle with the negative pressure side spool valve and the positive pressure side spool valve. . Therefore, in order to further finely control the negative pressure required for the suction nozzle, it is necessary to further add another negative pressure side spool valve different from the negative pressure side spool valve. Increasing the size is inevitable. Such a problem is solved by the above embodiment, but the following configuration may be further adopted. Hereinafter, another embodiment will be described with reference to FIG.

  FIG. 20 is a diagram schematically showing another embodiment of the component mounting apparatus. In the component mounting apparatus according to this embodiment, a plurality of suction nozzles 830 are arranged in a line in the horizontal direction (X direction), except that the specific configuration of the mounting head 800 and the negative pressure switching mechanism are different. This is basically the same as the eighth embodiment (FIG. 11). Therefore, in the following, while referring to FIG. 20, the description will focus on the differences, while the same components will be assigned the same reference numerals and description thereof will be omitted.

  In this embodiment, three mounting heads 800 are arranged in a line in the X-axis direction. These mounting heads 800 have the same configuration. In each mounting head 800, the upper end portion of the nozzle shaft 810 extending in the vertical axis direction (Z direction) can be rotated by the bearing unit 820, and The lower end portion of the nozzle shaft 810 is supported by the bracket 66 so as to be movable in the axial direction, and is supported so as to be movable in the vertical axis direction. Then, the R-axis motor 842 and the linear motor 861 are operated in response to a command from the drive control unit 900 that controls the driving of each part of the apparatus, whereby the nozzle shaft 810 rotates in the R-axis direction, and the vertical axis direction (Z Direction). In order to facilitate understanding of the invention, FIG. 20 shows only the sections of the bracket 66, the nozzle shaft 810, and the suction nozzle 830 extracted. In this embodiment, three nozzle shafts 810 are supported by one bracket 66, but the number of nozzles is not limited to "3", and the same number of brackets as the number of nozzle shafts 810 are provided. It is also possible to prepare and support the nozzle shaft 810 one by one with each bracket.

  As in the eighth embodiment, the lower end portion of each nozzle shaft 810 is provided with an air pressure introduction passage 811 up to the suction nozzle 830, and a through hole of the suction nozzle 830 communicates with the air pressure introduction passage 811. A suction nozzle 830 is attached to the lower end of the nozzle shaft 810. Thus, the nozzle shaft 810 and the suction nozzle 830 are integrated to function as a “nozzle”. In addition, each nozzle shaft 810 has one flow hole FH extending from the side surface thereof to the air pressure introduction passage 811 in the horizontal direction.

  The bracket 66 is provided with three holding holes in a straight line with a certain interval in the left-right direction (X-axis direction) and penetrating in the vertical axis direction (Z-direction). One lower end of the nozzle shaft 810 is inserted into each holding hole. More specifically, the nozzle shaft 810 is held so as to be rotatable in the vertical axis direction and movable in the vertical direction while sliding the lower end side surface of the nozzle shaft 810 along the inner peripheral surface of the holding hole.

  Inside the bracket 66, one communication chamber portion CH1a in which the holding holes are expanded in an annular shape in the horizontal direction is provided for each of the three holding holes. A communication hole CH1b is independently separated from each communication chamber portion CH1a and extends on the side surface of the bracket 66. Each of these communication chamber portions CH1a is formed longer in the vertical axis direction than the flow hole FH provided in the nozzle shaft 810, and the nozzle moves up and down in the vertical axis direction (Z direction) within the range of the length. Even though the flow hole FH communicates with the communication chamber portion CH1a, positive pressure and negative pressure can be supplied to the air pressure introduction passage 811 through the communication chamber portion CH1a and the flow hole FH as described below. Yes.

  A pressure switching / adjusting portion 58 is attached to the front surface of the bracket 66 for each mounting head 800 in the left-right direction, and each communication hole CH1b is connected to a vacuum source 59 via each pressure switching / adjusting portion 58. Yes. The pressure switching / adjusting unit 58 includes an electropneumatic vacuum regulator 581, a switching valve 582, and a positive pressure source 583 as shown in FIG. The electropneumatic vacuum regulator 581 has a pressure adjustment function for adjusting the vacuum pressure transmitted from the vacuum source 59 to a desired negative pressure. Further, the switching valve 582 has a function of switching the air circuit between the positive pressure side and the negative pressure side based on an operation command from the drive control unit 900. For this reason, when the switching valve 582 switches the positive pressure source 583 to the positive pressure side air circuit connected to the communication hole CH1b, the positive pressure is supplied to the suction nozzle 830 connected to the positive pressure side air circuit. On the other hand, as shown in FIG. 4B, when the switching valve 582 is switched to the negative pressure side, the vacuum source 59 is connected to the communication hole CH1b via the electropneumatic vacuum regulator 581 and the switching valve 582, and the negative pressure side air circuit ( A negative pressure is supplied to the suction nozzle 830 connected to the vacuum source 59-electro-pneumatic vacuum regulator 581-switching valve 582-communication hole CH1b). Moreover, when supplying a negative pressure to the suction nozzle 830 in this way, the electropneumatic vacuum regulator 581 adjusts the negative pressure in two stages as will be described later based on a control signal from the drive control unit 900.

  In this embodiment, a nozzle vertical position sensor 901 is provided for each mounting head 800 to detect the height position of the nozzle (= nozzle shaft 810 + adsorption nozzle 830) in the vertical axis direction, and the position information is used as a drive control unit. To 900. On the other hand, the drive control unit 900 controls each unit of the apparatus according to the mounting program stored in the memory 902 and operates as follows.

  The memory 902 stores various data such as electronic component data and electronic component height data corresponding to the mounting position, and the drive control unit 900 uses the nozzle vertical position sensor 901 to perform predetermined nozzle vertical movement based on these data. The corresponding switching valve 582 is switched at the position (the vertical position where the bottom of the electronic component contacts the substrate) to switch between positive pressure and negative pressure.

  Further, the drive control unit 900 gives a control signal to the electropneumatic vacuum regulator 581 according to the raising / lowering operation of the nozzles (= nozzle shaft 810 + adsorption nozzle 830) in each mounting head 800 to switch between the negative pressures PA and PB. Of these two types of negative pressures, the negative pressure PA is a vacuum pressure from the time when the nozzle is lowered or reaches the lower end for suctioning the component to the time when the suctioned component sucked nozzle is being raised. It is. The other negative pressure PB applies when the head unit 6 (see FIG. 11) is moved from above the component supply unit 4 (see FIG. 1) to the upper position of the substrate 3 and at the upper position of the substrate 3. The vacuum from before reaching the rising end of the nozzle that picks up the component until the mounting head 800 is moved down or until it reaches the falling end, including during the upward movement of the component mounting position. Pressure. Except for the above-mentioned period in which the negative pressure PA and the negative pressure PB are required, either the negative pressure PA or the negative pressure PB may be used.

  As described above, according to this embodiment, the negative pressure PA during the component suction by the suction nozzle 830 and the negative pressure PB during the transportation of the component by the head unit 6 are switched by one electropneumatic vacuum regulator 581. Can do. Therefore, compared with the case where the negative pressure switching function is added to the device described in Patent Document 1, negative pressure switching can be performed with fewer components, and the size of the device can also be suppressed. Moreover, such an effect is also exhibited in the first to ninth embodiments in which the negative pressure is switched using the vertical movement of the nozzle.

  When supplying a negative pressure to the suction nozzle 830, the drive control unit 900 may control the electropneumatic vacuum regulator 581 to finely adjust the negative pressure for each electronic component. That is, a large negative pressure is applied to a large part with a large inertial force, a relatively small negative pressure is applied to a small part with a small inertial force, or a large negative pressure is applied to a part that requires a large suction force. A small negative pressure is applied to the suction nozzle according to the component type for the components that only require force.

  Further, in the above-described embodiment, the invention is applied to the component mounting apparatus including the plurality of mounting heads 800, and the negative pressure is switched by controlling the electropneumatic vacuum regulator 581 according to the vertical movement of the nozzle. The application object of the present invention is not limited to this, and can be applied to a component mounting apparatus configured with a single mounting head.

  Furthermore, in the above embodiment, the positive pressure source and the negative pressure source are provided inside the apparatus, but the positive pressure source and the negative pressure source provided in another apparatus, or the utility (utility) of the factory where the apparatus is installed. You may comprise so that the positive pressure and negative pressure which are supplied from may be utilized. Moreover, you may comprise so that it may be open | released to air | atmosphere instead of a positive pressure source.

DESCRIPTION OF SYMBOLS 1 ... Component mounting apparatus 3 ... Board | substrate 51 ... Nozzle holder (holding part)
52 ... Cylindrical member 53, 54 ... Air pressure supply part 55, 533 ... Switching valve 63 ... R axis drive mechanism (nozzle moving mechanism)
82 ... Biasing member (nozzle moving mechanism)
83, 830: Suction nozzle 512 ... Holding hole 521 ... Through hole 531, 541 ... Negative pressure source 532 ... Positive pressure source 810 ... Nozzle shaft 811, 831 ... Air pressure introduction passage CH1, CH1b ... (first) communication hole CH2, CH2b ... (second) communication hole CH1a ... first communication chamber portion CH2a ... second communication chamber portion FH ... flow hole FH1 ... (first) flow hole FH2 ... (second) flow hole LT1 ... ( (First) annular groove LT2 (second) annular groove SH1 (first) air pressure supply hole SH2 (second) air pressure supply hole Z ... vertical axis direction

Claims (17)

In a component mounting device that sucks a component at the tip of a nozzle extending in the vertical axis direction and mounts the sucked component on a board,
A holding portion that holds the nozzle in a fitted state and holds the nozzle movably in the vertical axis direction while sliding the side surface of the nozzle along the inner peripheral surface of the holding hole; ,
A nozzle moving mechanism for moving the nozzle in the vertical axis direction with respect to the holding portion,
The nozzle has an air pressure introduction passage extending to the tip of the nozzle inside the nozzle, and at least one flow hole extending from the side surface of the nozzle to the air pressure introduction passage,
The holding portion communicates with the holding hole to allow the first negative pressure to be supplied to the holding hole, and communicates with the holding hole to supply the second negative pressure to the holding hole. A second communication hole that can be supplied,
The nozzle moving mechanism includes a lowering of the nozzle to a first position where the flow hole communicates only with the first communication hole, and a second position where the flow hole communicates only with the second communication hole. The component mounting apparatus is characterized in that the negative pressure supplied to the tip of the nozzle through the air pressure introduction passage is adjusted by the rise of the nozzle.   The component mounting apparatus according to claim 1, wherein the first communication hole has a long hole shape extending in a vertical axis direction. The nozzle has a first flow hole and a second flow hole as the flow hole,
When the nozzle is moved to the first position, at least one of the first flow hole and the second flow hole communicates with only the first communication hole, while the second communication hole The hole is blocked by the side surface of the nozzle and does not communicate with any of the flow holes,
When the nozzle is positioned at the second position, only one of the first circulation hole and the second circulation hole communicates with only the second communication hole, while the other The flow hole is blocked by the inner peripheral surface of the holding hole and does not communicate with any communication hole,
When the nozzle is positioned at a third position between the first position and the second position, one of the first flow hole and the second flow hole is the first flow hole. 3. The component mounting apparatus according to claim 1, wherein the component mounting apparatus communicates with only one communication hole and the other flow hole communicates with only the second communication hole.   4. The component mounting apparatus according to claim 3, wherein when the nozzle is moved to the first position, both the first flow hole and the second flow hole communicate with only the first communication hole. 5. The first flow hole and the second flow hole are provided at substantially the same position in the vertical axis direction and spaced apart from each other in a circumferential direction around the vertical axis direction,
When the nozzle is moved to the first position, only the first flow hole communicates with only the first communication hole, and the second flow hole is blocked by the inner peripheral surface of the holding hole. The component mounting apparatus according to claim 3, wherein the component mounting apparatus does not communicate with any of the communication holes. The first communication hole and the second communication hole are provided in the holding portion so as to be separated from each other in a circumferential direction around the vertical axis direction and so that the hole centers are substantially at the same position in the vertical axis direction. And
When the nozzle is moved to the first position, only the first flow hole communicates with only the first communication hole, and the second flow hole is blocked by the inner peripheral surface of the holding hole. The component mounting apparatus according to claim 3, wherein the component mounting apparatus does not communicate with any of the communication holes. The flow hole provided in the nozzle is one,
When the nozzle is positioned at a third position between the first position and the second position, the communication hole extends across the first communication hole and the second communication hole. The component mounting apparatus according to claim 1, wherein the component mounting apparatus communicates simultaneously with each other. And a first switching unit connected to the first communication hole and selectively supplying the first negative pressure or the first positive pressure to the holding hole through the first communication hole. Item mounting device according to any one of Items 1 to 7. A second switching means connected to the second communication hole and selectively supplying the second negative pressure or the second positive pressure to the holding hole via the second communication hole;
The component mounting apparatus according to claim 8, wherein an absolute value of the first positive pressure is smaller than an absolute value of the second positive pressure. The component mounting apparatus according to any one of claims 1 to 9, comprising a plurality of the nozzles.
The holding part has a plurality of the holding holes provided apart from each other around the vertical axis direction,
Each of the plurality of nozzles is fitted into each holding hole, and is held by the holding portion so as to be movable in the vertical axis direction while sliding the side surface of the nozzle along the inner peripheral surface of the holding hole. ,
The nozzle moving mechanism is a component mounting apparatus that selectively moves the plurality of nozzles in the vertical axis direction. It further comprises a cylindrical member that fits and supports the holding portion in a through-hole penetrating in the vertical axis direction,
The first communication hole and the second communication hole are communicated with each holding hole,
The cylindrical member is configured to be able to communicate with the plurality of first communication holes, and to supply the first negative pressure to the plurality of first communication holes, and the plurality of the plurality of first communication holes. A second air pressure supply hole configured to be able to communicate with the second communication hole and capable of supplying the second negative pressure to the plurality of second communication holes,
At least one of the inner peripheral surface of the through hole and the outer peripheral surface of the holding portion is provided with a first annular groove that communicates the plurality of first communication holes and the first air pressure supply hole,
The at least one of the inner peripheral surface of the through hole and the outer peripheral surface of the holding portion is provided with a second annular groove that communicates the plurality of second communication holes and the second air pressure supply hole. The component mounting apparatus described. The component mounting apparatus according to any one of claims 1 to 9, comprising a plurality of the nozzles.
The holding portion has a plurality of the holding holes arranged apart from each other in a horizontal direction perpendicular to the vertical axis direction,
Each of the plurality of nozzles is fitted into each holding hole, and is held by the holding portion so as to be movable in the vertical axis direction while sliding the side surface of the nozzle along the inner peripheral surface of the holding hole. ,
The nozzle moving mechanism is a component mounting apparatus that selectively moves the plurality of nozzles in the vertical axis direction. The first communication hole is formed in the holding portion so as to communicate the plurality of holding holes with each other,
The component mounting apparatus according to claim 12, wherein the second communication hole is formed in the holding portion so as to be separated from the first communication hole and to communicate the plurality of holding holes with each other. The holding portion includes a plurality of first communication chamber portions provided to communicate with the plurality of holding holes one by one at a first height position in the vertical axis direction, and the first height. A plurality of second communication chamber portions provided to communicate with the plurality of holding holes one by one at a second height position in the vertical axis direction different from the position;
The first communication hole communicates the plurality of holding holes with each other via the plurality of first communication chamber portions,
The component mounting apparatus according to claim 13, wherein the second communication hole communicates the plurality of holding holes with each other via the plurality of second communication chamber portions.   The component mounting apparatus according to claim 1, wherein an absolute value of the first negative pressure is larger than an absolute value of the second negative pressure.   The component mounting apparatus according to claim 1, wherein an absolute value of the first negative pressure is smaller than an absolute value of the second negative pressure.   The component mounting apparatus according to claim 10, wherein an absolute value of the first negative pressure is equal to an absolute value of the second negative pressure.

Images