JP3904440B2 - Electronic component mounting machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic component mounting machine that mounts electronic components at predetermined positions on a substrate.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a pneumatic apparatus that operates when supplied with pressurized air and an electric actuator are included. Electronic components are picked up and mounted at predetermined positions on a substrate by the operation of the pneumatic apparatus and the electric actuator. Electronic component mounting machines are known.
[0003]
More specifically, an electronic component mounting machine generally uses a negative pressure to pick up an electronic component, and a negative pressure is generated by supplying pressurized air to the head portion. An ejector (pneumatic device) to be driven, and a motor (electric actuator) such as a linear motor or a rotary motor for driving the head unit.
[0004]
In addition to ejectors, there are also electronic component mounting machines equipped with pneumatic equipment such as air cylinders and pneumatic bearings that operate when pressurized air is supplied.
[0005]
In addition to motors, there are electronic component mounting machines equipped with electric actuators such as solenoids.
[0006]
The electric actuator generates heat when energized during driving. When the temperature of the electric actuator and the peripheral member rises due to heat generation, the peripheral member and the like may be excessively deformed, thereby causing a problem that the mounting accuracy of the electronic component on the substrate is lowered.
[0007]
In addition, when the electric actuator is excessively heated, there is a problem that the operation efficiency is lowered, and the peripheral member is damaged in addition to the electric actuator itself.
[0008]
In recent years, there has been an increasing demand for improvement in mounting accuracy and reliability of electronic component mounting machines. Therefore, when the electric actuator cannot be sufficiently cooled by natural heat dissipation, the above problem is solved by forcibly cooling the electric actuator by circulating a refrigerant as shown in, for example, Japanese Patent No. 3148512. Was.
[0009]
[Problems to be solved by the invention]
However, such a cooling device has a problem that the cost of the electronic component mounting machine is significantly increased and the electronic component mounting machine is enlarged.
[0010]
The present invention has been made in view of these problems, and an object thereof is to provide a compact electronic component mounting machine with high mounting accuracy of electronic components and at a low cost.
[0011]
[Means for Solving the Problems]
The present invention includes a pneumatic device that operates when supplied with pressurized air, and an electric actuator. An electronic component is picked up by the operation of the pneumatic device and the electric actuator and placed in a predetermined position on the substrate. In the electronic component mounting machine to be mounted, at least one of air supply to the pneumatic equipment and exhaust from the pneumatic equipment cools the electric actuator, thereby solving the above problem.
[0012]
The present invention also provides a head portion that picks up an electronic component using negative pressure, an ejector that is provided in the head portion and generates negative pressure when supplied with pressurized air, and drives the head portion. An electronic component mounting machine that mounts an electronic component at a predetermined position on a substrate, wherein at least one of air supply to the ejector and exhaust from the ejector cools the motor By doing so, the above-mentioned problems are solved.
[0013]
ADVANTAGE OF THE INVENTION According to this invention, the mounting precision of an electronic component is high, and a low-cost and compact electronic component mounting machine is realizable.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.
[0015]
As shown in FIG. 1, an electronic component mounting machine 10 according to an example of the present embodiment includes a head unit 12 that picks up an electronic component using negative pressure, and a pressurized air that is provided in the head unit 12. Is supplied, and includes a first motor 16 and a second motor 18 for driving the head unit 12.
[0016]
The electronic component mounting machine 10 is characterized in that the supply of air to the ejector 14 cools the first motor 16 and the second motor 18.
[0017]
The head portion 12 includes a shaft 12A that protrudes downward, is movable in the Z direction, and is rotatable about the Z axis. An electronic component can be picked up at the lower end of the shaft 12A. Specifically, it has an electronic component suction nozzle (not shown) that can vacuum-suck electronic components using negative pressure and a pair of clamping pieces that can be opened and closed using negative pressure. One of the possible clamping devices (not shown) is provided at the lower end of the shaft 12A, so that an electronic component can be picked up.
[0018]
The head portion 12 is slidably attached to a beam member 20 having a U-shaped cross section disposed in the X direction. The beam member 20 is guided by a pair of Y-direction rail members 22 in the vicinity of both ends and is freely movable in the Y direction. Thereby, the head portion 12 is movable in the XY directions.
[0019]
The ejector 14 is connected to the upper end side of the shaft 12A and can supply negative pressure to the lower end of the shaft 12A.
[0020]
The first motor 16 is a linear motor, and a movable element 16A is mounted on the head part 12, and a plurality of stators 16B are installed along the X direction inside the beam member 20, thereby the head part. 12 can be driven in the X direction.
[0021]
The second motor 18 is also a linear motor, and a pair is arranged near both ends of the beam member 20. A movable element 18A is mounted in the vicinity of both ends of the beam member 20, and a plurality of the stators 18B are installed in the Y direction along the rail member 22, whereby the head portion 12 is moved together with the beam member 20 in the Y direction. Can be driven.
[0022]
Specifically, as shown in FIG. 2, the stator 18B is attached to the inside of a pair of side plates 24 along the Y direction. These side plates 24 are connected by end plates 26 and 28 at both ends.
[0023]
The end plates 26 and 28 are respectively formed with X-direction vent holes 26A and 28A and ports 26B and 28B communicating with the vent holes 26A and 28A.
[0024]
On the other hand, a vent hole 24A in the Y direction is formed in the pair of side plates 24, and both ends of the vent hole 24A communicate with the vent holes 26A, 28A of the end plates 26, 28.
[0025]
A compressor 36 is connected to the port 26B through a hose 34. The compressor 36 may be provided outside the electronic component mounting apparatus 10.
[0026]
On the other hand, one end of a flexible hose 38 is connected to the port 28B, and the other end of the flexible hose 38 is connected to the first motor 16 side.
[0027]
As shown in FIG. 3, in the first motor 16, a plurality of the stators 16 </ b> B are installed along the lower surface of the top plate 40 in the X direction and the upper surface of the bottom plate 42 in the X direction. The top plate 40 and the bottom plate 42 are connected by side plates 44 at both ends.
[0028]
The side plate 44 is formed with a Z-direction vent hole 44A and a port 44B communicating with the vent hole 44A. The flexible hose 38 is connected to the port 44B.
[0029]
The top plate 40 is formed with an X-direction vent hole 40A communicating with the vent hole 44A. The top plate 40 is formed with a port 40B that communicates with the vent hole 40A and opens upward.
[0030]
Similarly, a vent hole 42A and a port 42B are formed in the bottom plate 42, and the port 42B opens downward.
[0031]
Both the ports 40B and 42B communicate with a port 20A provided on the upper surface of the beam member 20 via a hose 45. The port 20A is connected to the ejector 14 through a flexible hose 46.
[0032]
Next, the operation of the electronic component mounting machine 10 will be described.
[0033]
When the compressor 36 supplies pressurized air, the pressurized air is guided from the hose 34 into the vent hole 24A of the side plate 24 through the vent hole 26A of the end plate 26. Further, the pressurized air is guided from the vent hole 28A of the end plate 28 to the first motor 16 side through the flexible hose 38. Pressurized air is introduced into the vent hole 44A of the end plate 44, passes through the vent holes 40A and 42A of the top plate 40 and the bottom plate 42, and is supplied to the ejector 14 through the hose 45 and the flexible hose 46. .
[0034]
The ejector 14 generates negative pressure when supplied with pressurized air and supplies the negative pressure to the shaft 12A of the head 12. From this negative pressure, the head 12 picks up the electronic component by vacuum suction or clamping.
[0035]
Next, in order to convey the picked-up electronic component to a predetermined position on the substrate, the first motor 16 and the second motor 18 are driven to move the head 12 in the XY directions. At this time, the shaft 12A of the head portion 12 is appropriately driven around the Z direction and the Z axis as necessary.
[0036]
By energizing the second motor 18, the stator 18 </ b> B generates heat, and this heat is transmitted to the side plate 24. This heat is further transmitted to the pressurized air in the vent hole 24A, and is discharged together with the pressurized air from the port 28B of the end plate 28 to the flexible hose 38.
[0037]
Thus, since the pressurized air discharges the heat of the stator 18B through the side plate 24, the temperature of the second motor 18 does not rise excessively.
[0038]
Similarly, in the first motor 16, the stator 16 </ b> B generates heat when energized. However, since this heat is discharged together with the pressurized air to the flexible hose 46, the temperature does not increase excessively.
[0039]
Therefore, peripheral members such as the first motor 16, the second motor 18 and the beam member 20 are not excessively deformed by heat, and the electronic component mounting machine 10 places the electronic component on the substrate with high accuracy. Can be installed. Further, the first motor 16 and the second motor 18 are not damaged by thermal stress. That is, the electronic component mounting machine 10 has high reliability. Furthermore, the first motor 16 and the second motor 18 have good mechanical efficiency.
[0040]
The electronic component mounting machine 10 uses the pressurized air supplied to the ejector 14 to air-cool the first motor 16 and the second motor 18, and uses a dedicated cooling device. Since it is not provided, it is low cost and compact.
[0041]
Next, a second example of the embodiment of the present invention will be described.
[0042]
As shown in FIG. 4, the electronic component mounting machine 50 according to the second example of the present embodiment is different from the electronic component mounting machine 10 according to the first example of the embodiment as shown in FIG. The pressurized air passes through the movable element 52A of the first motor 52 and the movable element 52A of the second motor 54, and is supplied to the ejector 14 while air-cooling the movable elements 52A and 52A. It is said.
[0043]
Since other structures are the same as those of the electronic component mounting machine 10, the same reference numerals as those in FIGS.
[0044]
Similarly to the second motor 18 according to the first example of the embodiment, the second motor 54 has a structure in which a plurality of pairs of stators 54B are installed in the Y direction. It is possible to move between these stators 54B in the Y direction.
[0045]
As shown in FIG. 5, a Y-direction air hole 56 is formed in the movable element 54 </ b> A, and one end of the air hole 56 is connected to the compressor 36 via a flexible hose 58.
[0046]
The other end of the vent hole 56 is connected to a movable element 52A of the first motor 52 through a flexible hose 60.
[0047]
The first motor 52 has a structure in which a plurality of pairs of stators 52B are installed in the X direction as in the first motor 16 according to the first example of the embodiment. The mover 52A is movable in the X direction.
[0048]
As shown in FIG. 6, the movable element 52A is provided with a through hole 62 communicating with both ends in the X direction and a port 64 communicating with the vent hole 62 and opening to the ejector 14 side. ing. The port 64 is connected to the ejector 14 through a hose 66.
[0049]
Next, the operation of the electronic component mounting machine 50 will be described.
[0050]
When the compressor 36 supplies pressurized air, the compressed air is supplied to the flexible hose 58, the movable element 54A of the second motor 54, the flexible hose 60, the movable element 52A of the first motor 52, and the hose. 66 and supplied to the ejector 14. As a result, the ejector 14 generates a negative pressure, and the head unit 12 picks up an electronic component.
[0051]
Next, when the first motor 52 and the second motor 54 are energized and driven to convey the picked-up electronic components, the movers 52A and 54A generate heat.
[0052]
This heat is transmitted to the pressurized air in the vent holes 56 and 62 and is discharged to the flexible hoses 60 and 66 together with the pressurized air.
[0053]
Therefore, peripheral members such as the first motor 52, the second motor 54, and the beam member 20 are not excessively deformed by heat, and the electronic component mounting machine 50 places the electronic component on the substrate with high accuracy. Can be installed. Further, the first motor 52 and the second motor 54 are not damaged due to heat. That is, the electronic component mounting machine 50 has high reliability. Furthermore, the first motor 52 and the second motor 54 have good mechanical efficiency.
[0054]
The electronic component mounting machine 50 uses the pressurized air supplied to the ejector 14 to air-cool the first linear motor 52 and the second linear motor 54. Since no device is provided, it is low cost and compact.
[0055]
Moreover, since the vent hole is formed in the movable element smaller than the stator, the vent hole can be easily formed.
[0056]
In the first example of the embodiment, the stators of the first and second motors are cooled by air. In the second example of the embodiment, the movers of the first and second motors are used. Although air cooling is performed, the present invention is not limited to this, and for example, the mover of one motor and the stator of the other motor may be air cooled.
[0057]
Moreover, both the mover and the stator of one motor may be air-cooled, and both the mover and the stator of both motors may be air-cooled.
[0058]
Further, when the heat generation of any one of the motors is not a problem, only one of the motors may be air-cooled.
[0059]
In the first example and the second example of the embodiment, the air supply before being supplied to the ejector cools the motor. However, the present invention is not limited to this, and the ejector is not limited to this. It is good also as an electronic component mounting machine which air-cools a motor by the exhaust from. For example, if the exhaust from the ejector disposed in the head portion is similarly configured to air-cool the first motor disposed in the vicinity of the head portion, the electronic device can be reduced in cost with a simpler structure and more compact. It can be a component mounting machine.
[0060]
In the first and second examples of the embodiment, the linear motor drives the head. However, the present invention is not limited to this. For example, the rotary motor drives the head. An electronic component mounting machine may be used, and at least one of air supply to the ejector and exhaust from the ejector may air-cool the rotary motor.
[0061]
Furthermore, an electronic component mounting machine including a solenoid for driving the head or the like may be used, and at least one of air supply to the ejector and exhaust from the ejector may cool the solenoid.
[0062]
In the first and second examples of the embodiment, at least one of the air supply to the ejector and the exhaust from the ejector cools the linear motor, but the present invention is limited to this. For example, an electronic component mounting machine equipped with other pneumatic equipment such as an air cylinder and a pneumatic bearing that operates when pressurized air is supplied, and supplies air to the pneumatic equipment such as an air cylinder and a pneumatic bearing. At least one of the exhaust air from the pneumatic device may air-cool an electric actuator such as a linear motor.
[0063]
【The invention's effect】
As described above, according to the present invention, it is possible to mount an electronic component on a substrate with high accuracy, and it is possible to realize a low-cost and compact electronic component mounting machine. .
[Brief description of the drawings]
FIG. 1 is a perspective view showing an outline of the overall structure of an electronic component mounting machine according to a first example of an embodiment of the present invention. FIG. 2 is a plan sectional view showing the structure of a second motor in the electronic component mounting machine. FIG. 3 is a front sectional view showing a structure of a first motor in the electronic component mounting machine. FIG. 4 is a perspective view showing an outline of an overall structure of an electronic component mounting machine according to a second example of an embodiment of the invention. FIG. 5 is a plan sectional view showing the structure of a second motor in the electronic component mounting machine. FIG. 6 is a front sectional view showing the structure of the first motor in the electronic component mounting machine.
DESCRIPTION OF SYMBOLS 10, 50 ... Electronic component mounting machine 12 ... Head part 14 ... Ejector (pneumatic apparatus)
16: First motor (electric actuator)
18 ... Second motor (electric actuator)

Claims (2)

An electronic component that includes a pneumatic device that operates when supplied with pressurized air and an electric actuator, and picks up an electronic component by the operation of the pneumatic device and the electric actuator and mounts the electronic component at a predetermined position on the substrate. On the machine,
Electronic component mounting machine, characterized in that the air supply to the pneumatic device is configured to cool the said electrical actuator. A head part that picks up electronic components using negative pressure, an ejector that is provided in the head part and generates negative pressure when supplied with pressurized air, and for driving the head part in the X direction In an electronic component mounting machine comprising a first motor and a second motor for driving the head portion in the Y direction and mounting an electronic component at a predetermined position on a substrate,
An electronic component mounting machine, wherein at least one of air supply to the ejector and exhaust from the ejector cools at least one of the first motor and the second motor .

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