JP5773839B2 - Micro component placement unit - Google Patents

Description

  The present invention relates to a micro component placement unit that can be used particularly advantageously by being incorporated in an electronic component mounting apparatus for mounting electronic components on the surface of a printed wiring board.

  Conventionally, an electronic component mounting apparatus has been used to mount an electronic component on the surface of a printed wiring board. In general, an electronic component mounting apparatus incorporates a micro component placement unit including a shaft body provided with a suction nozzle for electronic components (micro components) at the lower end and an elevating drive device for the shaft body.

  In the operation of the electronic component mounting apparatus, first, the micro component placement unit is moved above the tray in which the electronic components are accommodated. The micro component placement unit lowers the shaft body, lifts the shaft body after sucking the electronic component by the suction nozzle provided at the lower end thereof. Next, the electronic component mounting apparatus moves the micro component placement unit above the printed wiring board. The micro component placement unit lowers the shaft body, and after placing (mounting) the electronic component sucked by the suction nozzle on the surface of the printed wiring board, the shaft body is raised. By repeating such an operation, a large number of electronic components are mounted on the surface of the printed wiring board.

  In order to mount a large number of electronic components on the surface of a printed wiring board efficiently (in a short time), the micro component placement unit is usually configured to include a plurality of shaft bodies each having a suction nozzle at the lower end. The placement unit is repeatedly moved at high speed.

  Patent Document 1 discloses a micro component placement unit (head unit) including a plurality (for example, 10) of shaft bodies (drive shafts) each having a suction nozzle at the lower end. In order to allow each of the plurality of shaft bodies to be lifted and lowered independently, a lift driving device (linear motor) is provided for each shaft body.

  Patent Document 2 discloses a micro component placement unit (component transfer device) including a plurality of (for example, eight) shaft bodies (spindles) each having a suction nozzle at the lower end. The plurality of shafts are attached to the peripheral edge of the disk-shaped rotary head. A rotary drive device (servo motor 43) is connected to the rotary head. By operating this rotational drive device, the rotary head rotates (spins). As a result, the plurality of shaft bodies also rotate (revolve around the rotation axis of the rotary head). The micro component placement unit is provided with an elevating drive device (servo motor 45, feed screw 46, and lowering lever 47). By operating this lifting drive, the shaft disposed under the lowering lever of the lifting drive is lowered by the rotation of the rotary head.

JP 2009-170525 A (FIGS. 2 and 3) JP 2009-135553 A (FIG. 7)

  Since the micro component placement unit is repeatedly moved at high speed, it is desirable that the micro component placement unit has a simple configuration and is lightweight. If the mass of the micro component placement unit is large, the accuracy of the movement (positioning accuracy) may be reduced due to the inertia that occurs when the micro component placement unit starts or stops moving at high speed. The power consumption required for this is also increased.

  Since the micro component placement unit of Patent Document 1 has a complicated configuration including a lifting drive device (10 linear motors in total) for each shaft body, it is not easy to reduce the weight.

  Since the micro component placement unit of Patent Document 2 has a complicated configuration in which a plurality of shafts are rotated (revolved) by a rotary head, it is not easy to reduce the weight. Further, since each shaft body moves in the horizontal direction by rotation (revolution), the position of the electronic component sucked by the suction nozzle of the shaft body fluctuates unless the rotary head is rotated and positioned with high accuracy. Although the rotary head can be rotated using a high-precision rotary drive device, such a rotary drive device has a complicated configuration and tends to increase the mass of the micro component placement unit.

  An object of the present invention is to provide a micro component placement unit that is simple in configuration and easy in weight reduction.

  The present invention comprises a plurality of micropart raising / lowering means each comprising a shaft body provided with a micropart suction nozzle connected to a decompression mechanism at a lower end and a bearing for guiding the shaft body provided around the shaft body. Supporting and fixing the lifting mechanism and lifting mechanism for micro parts, in which the top part of the shaft body and the lower end part of the suction nozzle are aligned in the width direction of the shaft body in such a positional relationship that they are at the same height. A frame body, an elastic body that engages the shaft body of each lifting means and the bearing or the frame body, and supports the shaft body so that the height of all the tops thereof is a predetermined height, and the top of each shaft body Connected to a pressing device disposed above a space between the top of the arbitrary shaft body and the space between the bottom surface of the pressure device, and a pressure assisting member that can be inserted into the space between the bottom surface of the pressure device, This pressing assist member is driven to move and position in the horizontal direction. A micro component placement unit including a pressure assisting member driving mechanism, wherein the bearing of the elevating means holds a shaft body rotatably, the shaft body is formed from a tubular body having a hollow inside, and the decompression unit The mechanism is in the micro component placement unit including a decompression member attached to the top of the hollow shaft body and having a pipe line connected to a decompression source.

The preferable aspect of the micro component placement unit of the present invention is as follows.
(1) The pressing auxiliary member includes a disk-shaped member and a moving member that rotatably holds the disk-shaped member, and the pressing auxiliary member driving mechanism includes an annular belt and a driving device that realizes circular movement of the annular belt. .
(2) The decompression member includes a columnar rotation member mounted on the top of the hollow shaft body and a rotary bearing that rotatably supports the columnar rotation member, and the pipe line extends from the bottom surface of the columnar rotation member. A vertical pipe section extending vertically upward inside and a side pipe section extending in a direction intersecting the vertical pipe section from an opening provided in a side surface of the vertical pipe section, and the side pipe section is columnar rotated It is formed between the peripheral surface of the member and the inner peripheral surface of the rotary bearing, and is connected to an annular space where intrusion of outside air is blocked by the sealing member so that gas can flow.
(3) The side pipe part of the columnar rotating member extends on a plane perpendicular to the vertical pipe part.
(4) The head of the columnar rotating member protrudes above the rotating bearing.

  The present invention is also a decompression member having a pipe line connected to a decompression source, wherein the decompression member rotatably supports the columnar rotation member mounted on the top of the hollow shaft body and the columnar rotation member. And a direction in which the pipe line intersects the vertical pipe part from the vertical pipe part extending vertically upward from the bottom surface of the columnar rotating member and the opening provided on the side surface of the vertical pipe part. An annular space that is formed between the peripheral surface of the columnar rotating member and the inner peripheral surface of the rotary bearing, and the intrusion of outside air is prevented by the sealing member. There is also a decompression member that is connected to the portion so that a gas can flow.

Preferred embodiments of the decompression member of the present invention are as follows.
(1) The side pipe portion of the columnar rotating member extends on a plane perpendicular to the vertical pipe portion.
(2) The head of the columnar rotary member protrudes above the rotary bearing.

  Since the micro component placement unit of the present invention does not need to be provided with an elevating drive device for each shaft body, the configuration is simple and the weight can be easily reduced. The micro component placement unit of the present invention is attached to the top of a hollow shaft body without using a complicated structure decompression mechanism in which a through hole is formed in the peripheral wall of each shaft body and arranged around each shaft body. Since the decompression mechanism having the decompression member is used, the configuration is further simplified.

It is a front view which shows the structural example of the micro component arrangement | positioning unit of this invention. However, the electronic components 91a to 91f, the tray 92, and the frame body 16 are shown as cross sections. It is a left view of the micro component placement unit 10 of FIG. It is a figure which shows the structure of the press apparatus 51, the press auxiliary member 61, and the press auxiliary member drive mechanism 71 of the micro component arrangement | positioning unit 10 of FIG. It is a figure which shows the press apparatus 51 shown in FIG. 3, the press auxiliary member 61, and the press auxiliary member drive mechanism 71 in the state which moved the press auxiliary member 61 to the horizontal direction, and was positioned. It is a figure which shows the press apparatus 51 shown in FIG. 4, the press auxiliary member 61, and the press auxiliary member drive mechanism 71 in the state which lowered the press auxiliary member 61. FIG. FIG. 2 is an enlarged view of a shaft body 13a of the micro component placement unit 10 of FIG. 1 and a decompression member 30 attached to the top of the shaft body 13a. It is sectional drawing of the shaft body 13a and the decompression member 30 cut | disconnected along the cutting line VII-VII line entered in FIG. It is sectional drawing which shows another structural example of a decompression member. FIG. 2 is a diagram illustrating the micro component placement unit 10 of FIG. 1 in a state where a shaft body 13a is lowered together with a micro component suction nozzle 12a for sucking a first electronic component 91a. FIG. 2 is a diagram showing the micro component placement unit 10 of FIG. 1 in a state where the shaft body 13a is raised together with the micro component suction nozzle 12a that sucks the first electronic component 91a. It is a figure which shows the micro component arrangement | positioning unit 10 of FIG. 1 in the state which moved and positioned the pressing auxiliary member 61 for the adsorption | suction of the 2nd electronic component 91b. FIG. 2 is a diagram showing the micro component placement unit 10 of FIG. 1 in a state where a shaft body 13b is lowered together with a micro component suction nozzle 12b for sucking a second electronic component 91b. It is a figure which shows the microcomponent arrangement | positioning unit 10 of FIG. 1 in the state which made the electronic components 91a-91f each adsorb | suck to all the microcomponent adsorption nozzles 12a-12f. FIG. 2 is a diagram showing the micro component placement unit 10 of FIG. 1 in a state where a shaft body 13f is lowered together with a micro component suction nozzle 12f in order to place a first electronic component 91f on the surface of a printed wiring board 93. FIG. 2 is a diagram showing the micro component placement unit 10 of FIG. 1 in a state where shaft bodies 13a to 13f are lowered together with micro component suction nozzles 12a to 12f in order to simultaneously suck all electronic components 91a to 91f.

  The micro component placement unit of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view showing a configuration example of a micro component placement unit 10 of the present invention. FIG. 2 is a left side view of the micro component placement unit 10 of FIG. In FIG. 1, the electronic components 91a to 91f, the tray 92 for storing the electronic components, and the frame body 16 that supports and fixes the elevating mechanism 15 are shown as sections.

1 and 2 includes a shaft body (e.g., shaft body 13a) having a micro-part suction nozzle (e.g., suction nozzle 12a) connected to a decompression mechanism at the lower end, and around the shaft body. There are a plurality of minute component lifting / lowering means (for example, lifting / lowering means 15a) composed of a bearing 81 for guiding the lifting / lowering of the provided shaft body, and the top of each shaft body and the lower end of the suction nozzle are at the same height. Are arranged in the width direction of the shaft body in the positional relationship as described above, a frame raising / lowering mechanism 15 that supports and fixes the lifting mechanism 15, a shaft body and a frame body 16 of each lifting means, An elastic body 17 that engages the shaft body and supports the shaft body so that the height of all the top portions thereof is a predetermined height, a pressing device 51 disposed above the top portion of each shaft body with an interval, Inserting into the space between the top of the shaft and the bottom of the pressing device 51 Possible has been that the pressing assistant member 61 is connected and the pressing assistant member 61, and a pressing assistant member driving mechanism 71 for moving and positioning in the horizontal direction by driving the pressing assistant member 61.
A patent application (application number: Japanese Patent Application No. 2010-99104) has already been filed by the applicant of this patent application for the micro component placement unit having such a configuration.

  1 and 2 is an improved invention of the invention of the micro component placement unit described in the above-mentioned patent application, and the bearing 81 of the elevating means (eg, the elevating device 15a) is provided. A shaft body (for example, shaft body 13a) is rotatably held, the shaft body is formed from a tube body having a hollow inside, and the pressure reducing mechanism is formed by the hollow shaft body (for example, shaft body 13a). And a decompression member 30 having a conduit connected to a decompression source, mounted on the top of the.

  For example, the micro component placement unit 10 is incorporated in the electronic component mounting apparatus in a state in which the support plate 19 is connected and fixed to a driving device included in the electronic component mounting apparatus. By the operation of this driving device, for example, the micro component placement unit 10 is repeatedly moved at high speed between the tray 92 containing a plurality of electronic components and the printed wiring board (FIG. 14: 93). It is.

  The micro component placement unit 10 includes, for example, six lifting means 15a to 15f. The number of lifting means (that is, corresponding to the number of shaft bodies provided with minute component suction nozzles) is usually in the range of 2 to 30, preferably 3 to 20, and more preferably 4 to 10. Is set.

  The raising / lowering means 15a is comprised from the micro component adsorption | suction nozzle 12a connected to a pressure reduction mechanism, the shaft body 13a, and the bearing 81. FIG. The bearing 81 rotatably holds the shaft body 13a. The shaft body 13a is formed from a tubular body having a hollow inside. And the said pressure reduction mechanism is equipped with the pressure reduction member 30 which has the pipe line (FIG. 7: 30a) with which the top part of the said hollow shaft body (for example, shaft body 13a) was attached and connected to a pressure reduction source. Each structure of the raising / lowering means 15b-15f is the same as that of the raising / lowering means 15a.

  Below, the structure and operation | movement of the raising / lowering means 15a-15f are demonstrated by making the raising / lowering means 15a into a representative example.

  In the case of the micro component placement unit 10 shown in FIGS. 1 and 2, the pressure reducing mechanism of the elevating means 15a has a pressure reducing source (not shown) and a pipe line (FIG. 7: 30a) connected to the pressure reducing source. The decompression member 30 is configured.

  The decompression mechanism is connected to the minute component suction nozzle 12a through the internal space 22 of the shaft body 13a.

  For example, a known pump (not shown) typified by an ejector vacuum pump can be used as the decompression source.

  By operating the pressure reducing source of the pressure reducing mechanism and depressurizing the internal space 22 of the shaft body 13a via the conduit (FIG. 7: 30a) of the pressure reducing member 30, the electronic component is adsorbed on the lower end of the minute component adsorbing nozzle 12a. be able to. On the other hand, by stopping the operation of the decompression source and making the internal space of the shaft body 13a equal to the external air pressure (or making the pressure higher than the external air pressure), the electronic component is detached from the lower end of the minute component suction nozzle 12a. Can do.

  Around the shaft body 13a, a bearing 81 that guides the lifting and lowering of the shaft body 13a is provided. The bearing 81 rotatably holds the shaft body 13a. A plurality of (for example, four) linear grooves that extend along the length direction of the shaft body 13a and are spaced from each other along the circumferential direction of the shaft body 13a are formed on the outer peripheral surface of the shaft body 13a. 14a is formed. The bearing 81 includes a plurality of rolling elements (not shown) disposed in each linear groove 14a of the shaft body 13a, and the shaft body 13a is moved up and down by rolling along each linear groove 14a of each rolling element. A known linear motion bearing (for example, a ball spline bearing) is used which rotatably supports the shaft body 13a by engaging each rolling element and each linear groove 14a.

  The elevating means 15a to 15f are arranged such that the top of each shaft body and the lower end of the suction nozzle are aligned in the width direction of the shaft body in such a positional relationship that they are at the same height. An elevating mechanism 15 is configured. The elevating mechanism 15 is supported and fixed to the frame body 16 (via a bearing 81 of each elevating means and a rotary bearing 82 mounted around the bearing 81). The frame body 16 is fixed to the support plate 19 (via the connection member 24 and the rotation driving device 83).

  The micro component placement unit 10 is provided with an elastic body 17 that engages with the shaft body of each lifting means and the frame body 16 and supports the shaft body so that the height of the top of the shaft body becomes a predetermined height. ing. As shown in FIG. 2, the elastic body 17 is engaged with the shaft body (for example, the shaft body 13a) via the cylinder body 25a and the decompression member 30, and is engaged with the frame body 16 via the cylinder body 25b. .

  A coil spring is used as the elastic body 17. Instead of the coil spring, for example, a rubber cylinder may be used. The above-mentioned “predetermined height” means the height at which the lower end of the micro component suction nozzle can reach the electronic component (micro component) when the shaft is lowered, and the micro component placement unit is incorporated. It is set to an appropriate height according to the device to be used.

  For example, when the top part of the decompression member 30 attached to the top part of the shaft body 13a is pressed and lowered, the elastic body 17 engaged with the shaft body 13a and the frame body 16 is shortened. Accordingly, when the pressing of the pressure reducing member 30 is stopped, the elastic body 17 extends and the shaft body 13a rises.

  The elastic body may be engaged with a shaft body and a bearing (eg, bearing 81). The engagement between the elastic body and the shaft body and the engagement between the shaft body and the frame (or bearing) will be described in detail later.

  In order to raise and lower the plurality of shaft bodies 13a to 13f, the pressing device 51 is disposed above the top of each shaft body with a gap (gap) therebetween. Since the decompression member 30 is mounted on the top of each shaft body as described above, the “interval” means an interval above the top of each decompression member 30. That is, the pressing device 51 is disposed above the top of each decompression member 30 with a gap.

  The pressing device 51 is disposed above the movable block 52 having a bottom surface facing the upper end surface of each decompression member 30, and a rotary shaft 53 a disposed in parallel to the bottom surface of the movable block 52. One end is connected to a position different from the center of the rotation drive device 53 and the rotation shaft 53a of the rotation drive device 53, and the other end is connected to the front surface (or top surface) of the movable block 52. It is comprised from the rod 54 which can carry out the inclination movement centering on each said edge part.

  The movable block 52 and the plate 55 provided in the rotation drive device 53 are connected to each other via linear motion guide devices (linear guides) 56 and 56. Each linear motion guide device 56 includes a rail 56a extending in the vertical direction and a slider 56b slidably mounted on the rail 56a. The movable block 52 is movable (lifted / lowered) along the rail 56 a together with the slider 56 b of each linear motion guide device 56.

  When the rotating shaft 53a of the rotation driving device 53 is rotated in the direction (clockwise direction) indicated by the arrow 59a shown in FIG. 1, the rod 54 pushes down the movable block 52, whereby the movable block 52 is moved to the linear motion guide device 56. It descends with the slider 56b. On the other hand, when the rotation shaft 53a of the rotation drive device 53 is rotated in the opposite direction (counterclockwise direction), the rod 54 pulls up the movable block 52, whereby the movable block 52 is moved to the slider 56b of the linear motion guide device 56. Ascend with.

  Since the pressing device 51 has a small number of parts, it has an advantage that the configuration is simple and the weight can be easily reduced. The rotation driving device 53 and the rod 54 of the pressing device 51 function as a linear motion driving device that moves (moves up and down) the movable block 52 in the vertical direction. A known linear drive device can be used in place of the rotary drive device 53 and the rod 54. Examples of the linear drive device include a linear motor or a linear drive device that combines a rotary drive device and a feed screw.

  The micro component placement unit 10 includes a space (gap) between the top of any of the shaft bodies 13 a to 13 f and the bottom surface of the pressing device 51 (that is, the bottom surface of the movable block 52), that is, each decompression member 30. A pressing auxiliary member 61 that can be inserted into the space between the top of the pressing device 51 and the bottom surface of the pressing device 51, and connected to the pressing auxiliary member 61, driving the pressing auxiliary member 61 to move in the horizontal direction and A pressing assisting member driving mechanism 71 for positioning is provided.

  In FIG. 1 and FIG. 2, the pressing auxiliary member 61 includes, for example, a space (gap) between the top of the shaft body 13 a and the bottom surface of the pressing device 51, that is, the decompression member 30 and the pressing device mounted on the top of the shaft body 13 a. It is shown in a state of being inserted at a distance between the bottom surface of 51.

  The plate 62 a supporting the pressing auxiliary member 61 is fixed to the linear motion guide device 63. The linear motion guide device 63 includes a rail 63a extending in the vertical direction and a slider 63b slidably mounted on the rail 63a. The rail 63a is fixed to the plate 62b, and the slider 63b is fixed to the plate 62a. A plate 62c is fixed to the lower end surface of the plate 62a. The plates 62b and 62c are connected to each other via elastic bodies 64 and 64. For example, a coil spring is used as the elastic body 64.

  Therefore, by lowering the movable block 52 of the pressing device 51, the pressing auxiliary member 61 is pressed (pressed) by the movable block 52 and moves downward along the rail 63a together with the plates 62a and 62c and the slider 63b. Move (down). At this time, the elastic body 64 connecting the plate 62b and the plate 62c extends. Therefore, when the movable block 52 is raised, the elastic body 64 is shortened, and the pressing auxiliary member 61 moves (rises) along the rail 63a together with the plates 62a and 62c and the slider 63b. With such a mechanism, the pressing assist member 61 can be moved up and down.

  On the other hand, the plate 62 b supporting the linear motion guide device 63 is fixed to another linear motion guide device 65. The linear motion guide device 65 includes a rail 65a extending in the horizontal direction (along the alignment direction of the shaft bodies 13a to 13f) and a slider 65b slidably mounted on the rail 65a. The rail 65a is fixed to the end surface of the shelf plate 21 extending in the horizontal direction from the support plate 19.

  Accordingly, the pressing auxiliary member 61 is moved horizontally along the rail 65a (in the alignment direction of the shaft bodies 13a to 13f) together with the plates 62a and 62c, the linear motion guide device 63, the plate 62b, and the slider 65b of the linear motion guide device 65. It is possible to move along.

  The pressing assisting member driving mechanism 71 includes an annular belt 72 and a driving device 73 that realizes circulation movement of the annular belt 72.

  The drive device 73 includes a rotation drive device (for example, a motor) 74 having a rotation shaft 74a, a pulley 75a connected to the rotation shaft 74a, and four other pulleys 75b to 75e.

  A timing belt is used as the annular belt 72, and timing pulleys are used as the pulleys 75 a to 75 c that support the inner surface of the annular belt 72.

  The annular belt 72 is connected to a plate 62b that supports the pressing auxiliary member 61 via an L-shaped connecting member 76, for example. Accordingly, by rotating (or reversely rotating) the rotating shaft 74a of the rotation driving device 74 and circulatingly moving the annular belt 72, the pressing auxiliary member 61 connected to the annular belt 72 via the connecting member is moved in the horizontal direction. Can be moved and positioned.

  The pressing assist member driving mechanism 71 using the annular belt has an advantage that the configuration is simple and the weight can be easily reduced. The pressing assist member driving mechanism 71 functions as a linear drive device that moves the pressing assist member 61 in the horizontal direction. Instead of the pressing assist member driving mechanism 71, a known linear drive device can be used. Examples of the linear drive device include a linear motor or a linear drive device that combines a rotary drive device and a feed screw.

  Next, an example of the operation of the pressing assisting member 61 will be described with reference to the attached FIGS. In each of FIGS. 3 to 5, a pressing device 51, a pressing auxiliary member 61, and a pressing auxiliary member driving mechanism 71 of the micro component placement unit 10 shown in FIGS. 1 and 2 are written.

  As shown in FIG. 3, by operating the rotation driving device (FIG. 2: 74) of the pressing assisting member driving mechanism 71 and rotating the pulley 75a connected to the rotating shaft in the direction indicated by the arrow 79a, for example. The annular belt 72 is circulated and moved in the direction indicated by the arrow 79b. As a result, the pressing assisting member 61 moves in the direction indicated by the arrow 69a (rightward in the figure). Then, after the pressing auxiliary member 61 moves above the top of an arbitrary shaft body, the pressing auxiliary member 61 can be positioned in the horizontal direction by stopping the operation of the rotary drive device.

  FIG. 4 shows a state where the pressing assisting member 61 is positioned above the top of the shaft body 13b shown in FIG. 1 by the above positioning operation, for example.

  Then, as shown in FIG. 4, the rotary drive device (FIG. 2: 53) of the pressing device 51 is operated, and the rotary shaft 53a is rotated in the direction indicated by the arrow 59a to lower the movable block 52. When the movable block 52 is pressed, the auxiliary pressing member 61 moves (lowers) in the direction indicated by the arrow 69b.

  FIG. 5 shows a state where the pressing assist member 61 is lowered. As described above, the auxiliary pressing member 61 is positioned above the top of the shaft body 13b shown in FIG. Therefore, by lowering the pressing auxiliary member 61 as described above, the pressing auxiliary member 61 presses the decompression member 30 attached to the top of the shaft body 13b shown in FIG. As a result, the shaft body 13b moves down together with the minute component suction nozzle 12b. At this time, the elastic body 17 engaged with the shaft body 13b and the frame body 16 is shortened. Then, by raising the pressing assist member 61, the elastic body 17 supporting the shaft body 13b extends. Thereby, the shaft body 13b provided with the decompression member 30 at the top rises together with the minute component suction nozzle 12b.

  Accordingly, the micro component placement unit 10 shown in FIGS. 1 and 2 uses the pressing assist member driving mechanism 71 to move the pressing assisting member 61 above the top of an arbitrary shaft body to perform positioning, and then presses the pressing device 51. By raising and lowering the pressing assisting member 61 using this, the shaft body can be selectively raised and lowered together with the minute component suction nozzle provided at the lower end thereof, that is, it is necessary to provide a lifting drive device for each shaft body Therefore, the configuration is simple and the weight can be easily reduced.

  Further, the micro component placement unit 10 has a through-hole formed in the peripheral wall of each shaft body, and a decompression unit that is attached to the top of the hollow shaft body without using a decompression mechanism having a complicated configuration disposed around each shaft body. Since the decompression mechanism having the member 30 is used, the configuration is further simplified.

  The plurality of shaft bodies 13a to 13f are respectively supported and fixed to the frame body 16, and the shaft bodies do not move in the horizontal direction. Therefore, the shaft bodies are moved in the horizontal direction and positioned with high accuracy. There is no need to use a driving device.

  FIG. 6 is an enlarged view of the shaft member 13a of the micro component placement unit 10 of FIG. 1 and the decompression member 30 attached to the top thereof. 7 is a cross-sectional view of the shaft body 13a and the decompression member 30 cut along the cutting line VII-VII written in FIG.

  The decompression member (the decompression member of the present invention) 30 has the pipe line 30a connected to the decompression source as described above.

  The decompression member 30 includes a columnar rotary member 31 mounted on the top of the hollow shaft body 13a and a rotary bearing 32 that rotatably supports the columnar rotary member 31.

  The pipe line 30a extends in a direction intersecting the vertical pipe part 31a from the vertical pipe part 31a that extends vertically upward from the bottom surface of the columnar rotating member 31 and the opening 31b provided on the side surface of the vertical pipe part 31a. The side pipe part 31c which extends is included. The side pipe portion 31 c is formed between the peripheral surface of the columnar rotary member 31 and the inner peripheral surface of the rotary bearing 32, and gas flow is allowed to flow into the annular space portion 34 in which intrusion of outside air is blocked by the sealing member 33. Connected as possible.

  When the pressure reducing member of the present invention, for example, the pressure reducing mechanism including the pressure reducing member 30 is used, the columnar rotating member 31 does not move up and down with respect to the rotating bearing 32 although it rotates with respect to the rotating bearing 32. On the other hand, when a pressure reducing mechanism using a frame body that surrounds each shaft body is formed by forming a through hole in the peripheral wall of each shaft body, the shaft body rotates and moves relative to the frame body that surrounds the periphery. And it goes up and down in the vertical direction. Therefore, in the decompression member of the present invention, for example, the decompression member 30 described above, the sealing member 33 disposed between the columnar rotation member 31 and the rotation bearing 32 reliably prevents the outside air from flowing into the annular space 34. Is done. For this reason, the internal space of the hollow shaft body is sufficiently depressurized, and the fine parts can be reliably sucked by the suction nozzle provided at the lower end of the shaft body.

  The top portion of the shaft body 13 a is fitted into a portion of the bottom surface of the columnar rotating member 31 below the vertical pipe portion 31 a and is fixed by a screw 31 e provided on the side wall of the columnar rotating member 31.

  The outer diameter of the top portion of the shaft body 13a and the inner diameter of the vertical pipe portion 31a on the outer peripheral side of the top portion of the shaft body 13a are approximately equal to each other. Thereby, the penetration | invasion of the external air to the vertical pipe part 31a of the columnar rotation member 31 is blocked | prevented.

  In order to prevent the outside air from entering the vertical pipe section of the columnar rotating member, instead of adjusting the dimensions of the top of the shaft body and the vertical pipe section on the outer peripheral side as described above, or adjusting the dimensions described above. In addition, an annular sealing member (for example, an O-ring) may be disposed between the peripheral surface of the top of the shaft body and the inner peripheral surface of the vertical pipe section on the outer periphery thereof, or the top of the shaft body. An annular sealing member (for example, an O-ring) may be disposed between the surface and the surface of the columnar rotating member facing the top surface. An annular groove that can partially accommodate the sealing member can be formed on the surface that contacts the annular sealing member.

  The bolt 31d provided at the top of the columnar rotary member 31 is formed of a material having high hardness (for example, steel that has been quenched). As a result, even if the pressing assisting member (FIG. 2: 61) repeatedly collides with the top surface of the columnar rotating member 31 (that is, the top surface of the bolt 31d), damage to the columnar rotating member and occurrence of composition deformation are caused. Can be suppressed. For this reason, the columnar rotation member 31 (and hence the decompression member 30) comes to have excellent durability.

  The rotary bearing 32 includes a rotary bearing main body 32a mounted on the peripheral surface of the columnar rotary member 31, and a cylindrical body 32b including the rotary bearing main body 32a on the inner peripheral surface. A through hole 32c connected to the annular space 34 is formed in the cylindrical body 32b. In the through hole 32c of the cylindrical body 32b, for example, a connection tool 35 of a tubular body 36 connected to a reduced pressure source is screwed and fixed.

  The annular space 34 is formed around the columnar rotation member 31. Therefore, one or more side pipes connected to the annular space 34 can be further provided on the side surface of the vertical pipe portion 31 a of the columnar rotation member 31.

  A known annular packing can be used as the sealing member 33 for preventing the outside air from entering the annular space 34. As the annular packing, for example, an annular packing having a substantially Y-shaped cross section (also referred to as Y packing), an annular packing having a substantially V-shaped cross section (also referred to as V packing), or a cross section A substantially circular annular packing (also called an O-ring) can be used. In order to effectively prevent the outside air from entering the annular space 34 formed between the rotating columnar rotating member 31 and the rotating bearing 32, an annular packing having a substantially Y-shaped or substantially V-shaped cross section is used. preferable.

  In the case of the decompression member 30, the pipe line 30 a includes a vertical pipe part 31 a of the columnar rotary member 31, a side pipe part 31 c, an annular space part 34, a through hole 32 c of the rotary bearing 32, an internal space 35 a of the connection tool 35, and a tubular shape. The internal space 36 a of the body 36 is configured.

  As shown in FIG. 7, it is preferable that the side pipe part 31c of the columnar rotation member 31 extends on a plane perpendicular to the vertical pipe part 31a. This facilitates machining when the side tube portion 31 c is formed on the columnar rotation member 31.

  It is preferable that the head of the columnar rotary member 31 protrudes above the rotary bearing 32. Thereby, it becomes possible to press the shaft body 13a via the columnar rotation member 31 by the pressing auxiliary member (FIG. 2: 61).

  When the shaft body 13a is pressed through the columnar rotating member 31 by the pressing auxiliary member (FIG. 2: 61), most of the force (impact) applied by the pressing auxiliary member is applied to the rotary bearing body 32a of the rotary bearing 32. Instead, it is applied to the shaft body 13 a via the columnar rotation member 31. For this reason, each rotation bearing main body 32a (hence, pressure reduction member 30) comes to show the outstanding durability.

  However, in order to lower the shaft body including the decompression member 30, it is necessary to press the top of the columnar rotation member 31 that rotates together with the shaft body. Accordingly, when the shaft body is moved up and down using the linear motion drive device, the linear motion drive device (corresponding to the pressing device, the pressing assisting member, and the pressing assisting member driving mechanism in the case of the micro component placement unit of the present invention). Must be arranged above the decompression member 30 so as not to hinder the rotation of the shaft body. Therefore, the decompression member 30 can be preferably used by incorporating a linear motion drive device for raising and lowering the shaft body into a micro component placement unit having a configuration arranged above the top of the shaft body with a space therebetween. It can be particularly preferably used as a decompression member of the component placement unit.

  FIG. 8 is a cross-sectional view showing another configuration example of the decompression member. The configuration of the decompression member 40 in FIG. 8 is the same as the configuration of the decompression member 30 in FIG. 7 except that the head of the rotary bearing 32 (upper part of the lid 32d of the rotary bearing 32) protrudes above the columnar rotary member 31. It is the same.

  The rotary bearing 32 includes a lid 32d that is disposed in non-contact with the columnar rotary member 31 at the top of the cylindrical body 32b.

  In order to lower the shaft body including the decompression member 40, the top of the decompression member 40 (that is, the top of the lid 32d) is pressed. Since the top part of the decompression member 40 is comprised from the cover body 32d fixed to the rotary bearing 32, it does not rotate with the shaft body 13a. Therefore, the decompression member 40 can be used by incorporating a linear motion drive device for raising and lowering the shaft body into a minute component arrangement unit having a configuration arranged above the top of the shaft body with a space therebetween, or raising and lowering the shaft body. It can also be used by being incorporated in a micro component placement unit (for example, the micro component placement unit described in Patent Document 1) having a configuration in which the linear drive device to be fixed is fixed to the top of the shaft body.

  Below, the usage method of the micro component arrangement | positioning unit 10, for example, the method of arrange | positioning (mounting) the electronic components 91a-91f accommodated in the tray 92 on the surface of a printed wiring board, is demonstrated.

  First, as shown in FIG. 1, the pressing auxiliary member driving mechanism 71 moves the pressing auxiliary member 61 in the horizontal direction and positions it above the top of the shaft body 13a. Thereby, the pressing auxiliary member 61 is located at the space (gap) between the bottom surface of the pressing device 51 (that is, the bottom surface of the movable block 52) and the top portion of the shaft body 13a, that is, at the bottom surface of the pressing device 51 and the top portion of the shaft body 13a. It is inserted into the space between the top of the mounted decompression member 30.

  Next, by lowering the movable block 52 of the pressing device 51 together with the auxiliary pressing member 61, the shaft body 13a is lowered together with the minute component suction nozzle 12a as shown in FIG. After the lower end of the minute component suction nozzle 12a reaches the electronic component 91a, the decompression source of the decompression mechanism is actuated to operate the shaft body connected to the decompression source via the conduit of the decompression member 30 (FIG. 7: 30a). The internal space 13a (FIG. 2: 22) is depressurized, and thereby the electronic component 91a is sucked to the lower end of the suction nozzle 12a. Next, by raising the movable block 52 of the pressing device 51, the pressing assisting member 61 is raised, and as shown in FIG. 10, the shaft body 13a is raised together with the minute component suction nozzle 12a that has sucked the electronic component 91a. In this way, the first electronic component 91a is sucked.

  Subsequently, the pressing assisting member driving mechanism 71 moves the pressing assisting member 61 in the horizontal direction and positions it above the top of the shaft body 13b as shown in FIG. Then, by moving the movable block 52 of the pressing device 51 together with the pressing auxiliary member 61 in the same manner as described above, the shaft body 13b is lowered together with the minute component suction nozzle 12b as shown in FIG. After the lower end of the minute component suction nozzle 12b reaches the electronic component 91b, the electronic component 91b is attracted to the lower end of the suction nozzle 12b by operating the decompression source of the decompression mechanism. Next, by raising the movable block 52 of the pressing device 51, the pressing auxiliary member 61 is raised, and the shaft body 13b is lifted together with the minute component suction nozzle 12b that sucks the electronic component 91b. In this way, the second electronic component 91b is sucked.

  By repeating the same operation, the electronic components 91a to 91f are attracted to the minute component suction nozzles 12a to 12f, respectively, as shown in FIG.

  Then, as shown in FIG. 14, after moving the micro component placement unit 10 above the printed wiring board 93, for example, by lowering the shaft body 13f together with the micro component suction nozzle 12f, electrons are placed on the surface of the printed wiring board 93. The component 91f can be arranged (mounted). Similarly, the remaining electronic components are arranged on the surface of the printed wiring board 93.

  As shown in FIG. 2, it is preferable that the pressing assist member 61 includes a disc-like member 61 a and a moving member 61 b that rotatably holds the disc-like member 61 a. As such a pressing assist member 61, for example, a roller with a shaft, a component having a rotary bearing mounted around the shaft, or a cam follower used for a cam mechanism can be used.

  When the pressing auxiliary member 61 is composed of the disk-shaped member 61a and the moving member 61b, the disk-shaped member 61a is moved to the bottom surface of the pressing device 51 (that is, the movable block 52) when the pressing auxiliary member 61 moves in the horizontal direction. Roll while touching the bottom surface. As a result, the friction between the pressing auxiliary member 61 and the pressing device 51 becomes extremely small, so that the durability of the pressing auxiliary member 61 is improved.

  It is also possible to position the pressing device above the pressing auxiliary member with a gap and move and position the pressing auxiliary member in the horizontal direction without contacting the pressing device. In such a case, the pressing assisting member can be constituted by, for example, a metal member.

  Further, in the micro component placement unit of the present invention, the micro components (for example, electronic components) adsorbed by the micro component suction nozzle are arranged in a predetermined direction, so that the bearings of each lifting means hold the shaft body rotatably. ing.

  In the case of the micro component placement unit 10, for example, the bearing 81 of the lifting means 15a guides the lifting and lowering of the shaft body 13a and holds the shaft body 13a rotatably.

  A rotary bearing 82 is mounted around the bearing 81, and the bearing 81 can be rotated together with the shaft body 13a. The shaft bodies 13a to 13f are provided with pulleys 84a to 84f via bearings 81, respectively.

  On the other hand, the micro component placement unit 10 is provided with a rotation drive device 83. A pulley 85 a is provided on the rotation shaft 83 a of the rotation drive device 83.

  The pulley 85a is connected to the pulley 85b via the annular belt 86a. The pulley 85b is connected to the pulley 85c via the rotating shaft 87. The pulley 85c is connected to the pulleys 84a and 84b via the annular belt 86b and to the pulleys 84b and 84c via the annular belt 86c.

  The pulley 85a is similarly connected to the pulley 85d via the annular belt 86d. A pulley (not shown) connected to the pulley 85d via its rotating shaft is connected to the pulleys 84d and 84e via the annular belt 86e and to the pulleys 84e and 84f via the annular belt 86f. Yes.

  Accordingly, the rotary drive device 83 is driven to rotate the rotary shaft 83a, thereby rotating the pulleys 84a to 84f, thereby simultaneously rotating the shaft bodies 13a to 13f while being supported by the bearings 81, respectively. be able to.

  Instead of the rotation drive device 83, two rotation drive devices are provided, pulleys 84a, 84c, 84e are connected to the rotation shaft of one rotation drive device via pulleys and a belt, and the rotation of the other rotation drive device is performed. Pulleys 84b, 84d, and 84f can be connected to the shaft via pulleys and belts. That is, the shaft bodies 13a, 13c, and 13e can be simultaneously rotated by one rotation driving device, and the shaft bodies 13b, 13d, and 13f can be simultaneously rotated by the other rotation driving device.

  Accordingly, for example, while the electronic component 91f is mounted on the surface of the printed wiring board 93 using the micro component suction nozzle 12f included in the shaft body 13f as shown in FIG. 14, the shaft body 13e is moved to the micro component suction nozzle. By rotating together with 12e, the electronic component 91e sucked by this suction nozzle 12e can be rotated in a predetermined direction. Therefore, a plurality of electronic components can be efficiently mounted on the surface of the printed wiring board (in a short time). Since the rotation driving method of the shaft body is known, no further explanation will be given.

  Further, when each shaft body is rotationally driven as described above, the engagement between the elastic body that supports each shaft body, the shaft body, and the frame body (or bearing) prevents the shaft body from rotating. It is necessary to carry out in the state without.

  For example, the elastic body 17 shown in FIG. 2 supports the cylindrical body 25 a at its upper end, and is engaged with the shaft body 13 a via the cylindrical body 25 a and the decompression member 30. The elastic body 17 also has a lower end portion supported by another cylindrical body 25b and is engaged with the frame body 16 through the cylindrical body 25b. Therefore, the shaft body 13a can be rotated together with the columnar rotating member 31 pivotally supported on the rotary bearing 32 of the decompression member 30, and can be lowered together with the decompression member 30 and the cylindrical body 25a.

  The elastic body 17 can also be engaged with this bearing (eg, bearing 81) by supporting the lower end of the elastic body 17 directly or via another component.

  FIG. 15 is a diagram illustrating the micro component placement unit 10 of FIG. 1 in a state where the shaft bodies 13a to 13f are lowered together with the micro component suction nozzles 12a to 12f in order to simultaneously suck all the electronic components 91a to 91f. is there.

  As shown in FIG. 12, it is preferable that the pressing assisting member 61 be movable outside a region below the bottom surface of the pressing device 51 (that is, the bottom surface of the movable block 52).

  When such a configuration is adopted, the pressing auxiliary member driving mechanism 71 moves the pressing auxiliary member 61 to the outside of the region below the bottom surface of the pressing device 51, and then lowers the movable block 52 of the pressing device 51, As shown in FIG. 12, the shaft bodies 13a to 13f can be lowered at the same time, and the electronic components 91a to 91f can be simultaneously sucked by the plurality of minute component suction nozzles 12a to 12f. By such an operation, the electronic components can be adsorbed to the minute component adsorbing nozzles 12a to 12f in a short time, so that a plurality of electronic components can be mounted on the surface of the printed wiring board extremely efficiently.

  The micro component placement unit of the present invention can be advantageously used by being incorporated in an apparatus for mounting or moving various micro components typified by micro electronic components and mechanical components. Examples of the electronic component include a chip type electronic component represented by a chip capacitor and a chip resistor. Examples of mechanical parts include small-sized optical lenses and optical filters used in cameras mounted on mobile phones.

  The component placement unit according to the present invention moves, for example, a device for mounting a small-sized optical lens or optical filter as described above to a predetermined position inside a mobile phone, or a micro component housed in a tray, and orders a customer. Accordingly, it can be used by being incorporated in a device that is accommodated in another tray.

10 Micro component placement unit 12a, 12b, 12c, 12d, 12e, 12f Micro component suction nozzle 13a, 13b, 13c, 13d, 13e, 13f Shaft body 14a Linear groove 15 Lifting mechanism 15a, 15b, 15c, 15d, 15e, 15f Lifting means 16 Frame body 17 Elastic body 19 Support plate 21 Shelf plate 22 Internal space of shaft body 24 Connection member 25a, 25b Cylindrical body 30 Depressurizing member 30a Pipe line 31 Columnar rotating member 31a Vertical pipe part 31b Opening part 31c Side pipe part 31d Bolt 31e Screw 32 Rotary bearing 32a Rotary bearing body 32b Cylindrical body 32c Through-hole 32d Lid body 33 Sealing member 34 Annular space 35 Connecting device 35a Internal space of connecting device 36 Tubular body 36a Internal space of tubular body 40 Depressurizing member 51 Pressing device 52 Movable block 53 Rotation driving device 53a Rotating shaft 54 Rod 55 Plate 56 Linear motion guide device 56a Rail 56b Slider 59a Arrow indicating the rotational direction of the rotation shaft 53a of the rotation drive device 53 61 Press assisting member 61a Disk-shaped member 61b Moving member 62a, 62b, 62c Plate 63 Linear motion guide device 63a Rail 63b Slider 64 Elastic body 65 Linear motion guide device 65a Rail 65b Slider 69a, 69b Arrow indicating the moving direction of the pressing auxiliary member 61 71 Pressing auxiliary member driving mechanism 72 Annular belt 73 Driving device 74 Rotating driving device 74a Rotating shaft 75a, 75b, 75c, 75d, 75e Pulley 76 Connection member 79a Arrow indicating the rotation direction of the pulley 75a 79b Arrow indicating the direction of circulation movement of the annular belt 72 81 Bearing 82 Rotating bearing 83 Rotating drive device 83a Rotating shaft 84a, 84b, 8 c, 84d, 84e, 84f Pulley 85a, 85b, 85c, 85d Pulley 86a, 86b, 86c, 86d, 86e, 86f Annular belt 87 Rotating shaft 91a, 91b, 91c, 91d, 91e, 91f Electronic component 92 Tray 93 Printed wiring Board

Claims (3)

There are a plurality of minute parts lifting means comprising a shaft body having a minute part suction nozzle connected to the decompression mechanism at the lower end and a bearing for guiding the lifting and lowering of the shaft body around the shaft body, and the top of each shaft body And a lifting / lowering mechanism for minute parts in which the lower end portions of the suction nozzles are aligned in the width direction of the shaft body in such a positional relationship that they are at the same height, and a frame body that supports and fixes the lifting mechanism , An elastic body that engages with the shaft body of each lifting means and the bearing or the frame body and supports the shaft body so that the height of all the top portions thereof is a predetermined height, and is spaced above the top portion of each shaft body A pressing device arranged via a pressure auxiliary member, which can be inserted in a space between the top of any shaft body and the bottom surface of the pressing device, and connected to the pressing auxiliary member. Press auxiliary part that moves and positions in the horizontal direction by driving the member A small part arrangement unit including a drive mechanism,
A bearing of the elevating means holds a shaft body rotatably, the shaft body is formed of a tube body having a hollow inside, and the pressure reducing mechanism is a pressure reducing device mounted on the top of the hollow shaft body. A microcomponent placement unit comprising a decompression member having a conduit connected to a source.   The pressure reducing member is composed of a columnar rotating member mounted on the top of a hollow shaft body and a rotary bearing that rotatably supports the columnar rotating member, and the pipe line is formed from the bottom surface of the columnar rotating member to the inside. A vertical pipe section extending vertically upward, and a side pipe section extending in a direction intersecting the vertical pipe section from an opening provided in a side surface of the vertical pipe section, and the side pipe section rotates in a columnar shape 2. The device according to claim 1, which is formed between a peripheral surface of the member and an inner peripheral surface of the rotary bearing, and is connected to an annular space portion in which intrusion of outside air is prevented by the sealing member so that gas can flow. The micro component placement unit described.   The micro component placement unit according to claim 2, wherein the side tube portion of the columnar rotating member extends on a plane perpendicular to the vertical pipe portion.

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