JPH01247327A - Electronic parts mounting device - Google Patents

Abstract

PURPOSE:To substantially simplify a power transmitting mechanism further to eliminate the generation of vibration in the time of moving at a high speed by constituting a driving source for moving a part supply table, divided into two or more parts, reciprocating of a linear motor. CONSTITUTION:A part supply table 15 (15a to 15e), divided into two or more parts, mounts a running member 16 onto a linear guide 12 of a main unit base 11, running to reciprocate by a linear motor 13, and the table 15 is positioned to be opposed facing to a transfer loading device 3, mounting a loaded electronic part to be transferred. This linear motor 13 forms its stationary part by a magnet 17, oppositely set up in both sides of a groove 14 in the main unit base 11, and a magnetic circuit 18 therebetween and forms a movable part by protrusively providing a bobbin 19, winding a coil 19', to a bottom surface of the divided table 15. Thus simplifying a power transmitting mechanism, because no long ball thread is used, the mechanism, when it moves at a high speed, generates no vibration while enabling an operating stroke to facilitate its extension.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an electronic component mounting device that mounts various types of small parts onto predetermined positions on a board at high speed, and particularly relates to an electronic component mounting device that mounts various types of small parts on predetermined positions on a board. Related to mounting components onto printed circuit boards at high speed.

[Conventional technology]

Conventionally, an electronic component mounting device that transfers a wide variety of electronic components onto a printed circuit board is a component supply system that reciprocates from side to side and stops at a predetermined position, as disclosed in Japanese Patent Laid-Open No. 55-118698. An electronic component supply unit is placed on the table, and the component supply table moves each time a transfer head picks up an electronic component on the supply unit.

The mechanism is shown in FIG. 6 as a plan view. The electronic component mounting device consists of a main body base 19, a component supply table 2, and a transfer device 3 using a rotary head or Cartesian coordinate robot.
(The rotary head is shown in FIG. 6).The XY child table is the main component, and the main component is the main component of the component supply table 2. ! In the +1 device, as shown in FIG. 7, which is a cross section taken along the line ■-■ in FIG.
There is a method of driving with a motor 10. In addition, there is also a system in which the ball screw is driven by a DC motor or a stepping motor.

On the component supply table 2, several dozen to nearly 100 types of tape reel units (component storage units) containing electronic components are placed in parallel. this table 2
is positioned at high speed so that the tape reel containing the required electronic components is located directly below the suction position 3a of the rotary head 3. When the rotary head 3 picks up the electronic component and rotates, the XY child table and the printed circuit board are coated with adhesive in advance so that the predetermined position is directly below the transfer position 3b of the rotary head 3. Then, the electronic components are positioned and placed on the printed circuit board. The above operations are performed continuously at high speed.

[Problem to be solved by the invention]

In conventional devices such as those described above, when electronic components run out on the table, the entire device is stopped and the components are replenished. In this type of equipment, in which the bed is transferred at high speed per second, the stoppage due to this setup time results in a reduction in the amount of work.

In addition, among the 20 to 40 types of parts, the weight of the moving parts is several tens of kg, the motor capacity is less than IKW, and the controller capacity is small, but each type (approximately 1
00 types), the weight of the moving parts will be over 100 kg, and if the speed is high (0.3 to 0.4 seconds/piece), the capacity of the motor and controller will also be large, making it uneconomical and the parts supply table In the case of a wide variety of products, lengths of several meters must be used, and high-speed driving is difficult.
Technically extremely difficult to control.

Furthermore, since heavy objects weighing 100 kg or more move at high speed, vibration and noise are also large, which poses various problems for high-precision loading equipment, such as lowering loading performance and lowering the strength of component parts. .

In particular, in the case where the component supply table is driven using a ball screw, if the movement stroke of the supply table is increased, the ball screw must also be made longer. When a long ball screw is used, its rigidity decreases, but in order to move the table at high speed, the ball screw must be rotated at high speed, which tends to cause vibrations. For this reason, it was difficult to increase the speed of the parts supply table.

It is an object of the present invention to achieve high-speed movement of a component supply table with a compact drive source, to lengthen the movement stroke of the component supply table, and to prevent vibrations even when reciprocating at high speed, and to provide a safe system. The objective is to obtain an electronic component mounting device.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a component supply table on which electronic components are mounted and moves back and forth from side to side on a main body base, a driving means for driving the table, and a component supply table for transferring the electronic components on the table to a predetermined position. In the electronic component mounting apparatus, the driving device includes a stationary part having a magnet means provided on the same straight line on one main body base, and a magnet means of the stationary part located below the component supply table. The component supply table is controlled by a drive device using the linear motor and positioned at a predetermined position facing the transfer device. There is a particular thing.

Other features of the present invention include a component supply table on which electronic components are mounted and which moves back and forth from side to side on the main body base, a driving means for driving the table, and a component supply table for transferring the electronic components on the table to a predetermined position. In the electronic component mounting device, the table is composed of a plurality of divided tables, and the drive device includes a stationary part having a magnet means provided on the same straight line on the main body base; It is composed of a linear motor equipped with a movable part having a magnet means provided at the lower part of each divided table so as to face the magnet means of the stationary part, and each divided table is individually controlled by a drive device using the linear motor. and positioning it at a predetermined position facing the transfer device.

[Effect]

In the present invention, the driving source for reciprocating the parts supply table is a linear motor composed of a magnet means provided on the main body base and a magnet means provided on the parts supply table. A mechanical drive source such as a screw is not required, the drive source can be made much more compact, and high-speed movement is easily possible.

In addition, even if the movement stroke of the parts supply table is lengthened, it is only necessary to install a magnet that constitutes a linear motor on the base of the main body in the movement range, so the movement stroke can be made as long as desired, and even in that case, the parts supply table can be The table can be moved at high speed, and there is no need to use a long ball screw like in the past, so there is no vibration.

Furthermore, in the present invention, by using a linear motor as the source of the component supply table (MD), there is no need for a rotating part as in the conventional ball screw system or rack and pinion system.
As a result, you can work more safely.

Further, according to the present invention having the above characteristics, the component supply table is divided into a plurality of parts, and each divided table is configured to be able to be driven and stopped individually by a linear motor, so that the weight of each divided table is is lighter and can be driven at high speed with a smaller drive source. In addition, only the dividing table on which the electronic components to be supplied are placed is driven at high speed and positioned at a predetermined position, and the other dividing tables are kept stationary while the electronic components are being transferred to the transfer board. Therefore, electronic parts can be replenished during this time.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings of ゛′°°゛Shoji Chuanaka.

Figure 1 is a plan view of the component mounting device, Figure 2 is ■- in Section 1.
■This is an enlarged cross-sectional view of the line.

The main body base 11 has a predetermined length along which the parts supply table runs, and rail-shaped linear guides 12 are protruded from both sides of the upper surface, and a groove 14 in which a linear motor 13 is installed is provided in the central part in the longitudinal direction of the main body base. It is formed along the entire length. The parts supply table that runs on the main body base 11 is
A table that supplies about 100 types of electronic components requires several meters in total. Divided table 1.5 (15a, 15b, 15c) is divided into multiple parts.
, l 5 d.

15e), and each split table 15 has traveling members 16 provided on both sides of its lower surface that are connected to the linear guide 12.
The divided tables 15 are engaged with each other so that each divided table 15 can travel individually on the linear guide 12. A linear motor 13, which is a drive device for the table, is connected to the groove 1 of the main body base 11.
A stationary portion is formed by magnets 17 disposed facing each other on both sides of the magnet 4 and a magnetic circuit (magnetic force lines) 18 formed between both magnets 17. The movable part of the linear motor 13 is a bobbin 19 on which a coil 19' is wound, and a split table 1.
The bobbin 19 is inserted into the space between both magnets, and the coil 19' is formed to protrude from the lower surface of the magnet 1.
It is arranged so as to cut 8. Therefore, by energizing the coil 19', the dividing table 15 can be moved on the linear guide 12 by magnetic force. The magnets 17 of the stationary part are arranged over the entire stroke of the main body base 11, and the bobbins 19 of the movable part are arranged in a straight line on each dividing table 15, and the magnets 17 of the stationary part are shared. There is.

Of the plurality of divided tables 15, only the divided table (divided table 15b in FIG. 1) facing the transfer device 3 constituted by a rotary head is moved for positioning repeatedly with high precision, and the other division table 15a,
15b, 15c, 15d.

15e moves to both sides of the main body base and is stopped.

As mentioned above, it is necessary to position the dividing table with high speed and high precision in the range section 20 near the transfer device FF13.
Since the length of the extending portion is about 1 m, the driving device can be simplified as shown in FIG. 3. That is, in areas other than the L part 20, there is no need for high-speed, high-precision positioning, and only transportation is required, so in that area, the magnets 17b may be disposed intermittently, or magnets with a lower coercive force than the area of the 5 part 20 may be placed. may be placed.

Driving in areas other than the L portion involves running in consideration of inertia force. In addition, the position detection mechanism for positioning is provided with a high-resolution optical or magnetic linear scale 21 only in the 5th part 20 area, and a proximity switch 2 in the area other than the 5th part 20.
2 intermittently or a low-resolution linear scale is arranged to detect the position of each division table 15. Reference numeral 23 denotes a linear scale head provided on the dividing table side, and is arranged to face the linear scale provided on the side surface of the main body base 11.

The control device of this embodiment will be explained based on FIG. 4.

Each linear motor 13a, 13b, 13c, 13d of a plurality of divided tables 15a...15e.

13e, at least two sets of drivers 24 and servo controllers 25 are provided, a system controller 26 is provided above the servo controller 25, and the driver 24 and the linear motors 13a of each division table...13
A drive circuit 27 and a table position detection circuit 2 are connected between
8 is provided. As a result, the drive circuit 27 drives the coils 19a of each division table...
. . 19e and the position detection circuit 28 are switchably connected to the linear scale head 23 (23a . . . 23e).

Next, the functions of the above-mentioned control device and the associated operations of each division table will be explained in order with reference to FIGS. 5(a), (b), (c), and (d).

(a) The diagram shows the linear motor 13 of the split table 15c on which parts ordered by the system controller 26 are placed.
c is shown being driven by the driver 24 until the deviation amount of the servo controller 25 becomes zero so that it is directly below the transfer device 3, and the drive circuit 27 and the position detection circuit 2
8 are respectively connected to the coil near scale head of the dividing table 15c by a switch 29. Therefore, since this state is highly accurate positioning, the position is detected by the linear scale 21. On the other hand, the linear motors 13a, 13b, 13d, and 13e of the other split tables 15a, 15b, 15d, and 15e are located at both ends of the main body base, and are connected to the drive circuit 27 and the position detection circuit 28. driver 24' is not used. Next, when the system controller 26 issues a command to use the parts placed on the division table 15d, as shown in FIG. The linear motor 13c of the divided table 15c is
d, and at the same time the driver 2 of the switch 29
4' drive circuit 27' is connected to the coil of the linear motor 13d. With this connection, the linear motor 13d moves to a position facing the transfer device at the center of the device, but when it passes the proximity switch 22' closest to the linear scale 21 or a specific part of the low-resolution linear scale, the command is sent to the system controller 26. The position detection circuit 28' is connected to the linear scale head of the division table 15d by the switch 29, as shown in FIG. On the other hand, the linear motor 13c of the split table 15c is connected to the proximity switch 22 on the opposite side from the proximity switch 22' etc.
', the position detection circuit 28 and the division table 15
c is disconnected from the linear scale head, and when it reaches a predetermined location, the drive circuit 27 and the coil of the linear motor 13c are further disconnected.

Then, as shown in the figure (d), the linear motor 13d of the dividing table 15d sequentially moves for positioning according to the system controller 26, stops at a predetermined position, and performs the component transfer work via the transfer device. This state is the same as that of the linear motor 13c in FIG.
°28 is used. The switching operation is performed in this way, and is driven by fewer drivers and circuits than the number of linear motors.
Can be positioned.

In FIG. 5, only one divided table is positioned at high speed and with high precision, and the switching operation thereof is explained, but it is also possible to position two divided tables at high speed and with high precision using two drivers at the same time.

In addition, since 20 to 30 types of small electronic components are placed on each split table and are transferred to the board at high speed, it is recommended to use the split table to transfer the parts placed on the split table. Generally, this is not carried out, but it is preferable to configure the system so that parts from adjacent partitioned tables are sequentially transferred.

Among the plurality of divided tables, the divided table that is empty of electronic components is stopped on both sides of the main body base, and in this state, the divided table is replenished with electronic components. Even during this replenishment time, electronic components are transferred from the dividing table located in the center to the printed circuit board via the transfer device, and electronic components are transferred to the component supply table (divided table) while the entire device is operating. Can be replenished.

As mentioned above, among the multiple divided tables, only the divided table that is performing the electronic component transfer work via the transfer device is moving to position at high speed, and the other divided tables are stationary. The weight of the moving parts can be reduced to a fraction of the conventional weight depending on the number of divisions of the parts supply table, and the force, vibration, and noise generated in each part of this fruiting device are also reduced, increasing reliability in terms of performance and strength. Sexuality also improves.

As a result, even when driving a supply table that handles a wide variety of parts at high speed, the capacity of the motor and controller is small, making it economical. In addition, in the present invention, since the component supply table is driven by a linear motor, there is no need to use a ball screw or the like as in the past, and as a result, even when the movement stroke of the supply table is increased, vibrations are not generated. The parts supply table can be moved at high speed without any problems.

Furthermore, when the parts supply table consists of a plurality of divided tables, in order to drive each divided table independently, drive sources corresponding to the number of independent divided tables were conventionally required. By using a linear motor as the drive source, the magnet provided on the main body base can be shared as the drive source for each division table, and even if the number of divisions of the parts supply table increases, the drive source will not become complicated or large. It becomes compact without any problem.

In addition, by using a linear motor as the drive source for the component supply table, the drive source can be made more compact compared to conventional ball screw systems or rack and pinion systems, and it is safe because there are no rotating parts.In addition, the component supply table can be moved. This method has the advantage of easy control and high positioning accuracy.

〔Effect of the invention〕

As explained above, according to the present invention, since the drive source for reciprocating the one-component supply table is configured with a linear motor, the power transmission mechanism is significantly improved compared to the conventional rotary motor. As a result, high-speed movement of the component supply table can be realized with a compact drive source. In addition, since it uses a linear motor, if you want to increase the movement stroke of the component supply table, you only need to lengthen the installation range of the magnet means on the main body base, which means that you do not have to use a long ball screw like in the past. Since there is no vibration, there is no vibration even when the table is moved at high speed. Furthermore, in the present invention, by using a linear motor as the drive source of the component supply table, there is no rotating part in the table drive source, and as a result, the operator of the electronic component mounting apparatus can work safely.

Further, in the present invention in which the component supply table is divided into a plurality of parts and each table is individually driven by a linear motor, in addition to the above-mentioned effects, the following effects can also be obtained. That is, since the weight of each divided table is reduced, high-speed driving is possible with a small drive #J'g, and the capacity of the drive section for controlling the drive section can also be reduced. In addition, only the divided table on which the electronic components being supplied are placed can be driven at high speed and positioned at a predetermined position, while the other divided tables can be kept stationary. As a result, there is no need to stop the operation of the device for parts replenishment, which has the effect of improving work efficiency.

2 is an enlarged sectional view taken along the line ■-■ in FIG. 1, FIG. 3 is a detailed plan view of the parts supply table shown in FIG. 1, and FIG. 4 is a diagram showing the implementation of the present invention FIG. 5 is a block diagram showing an example of the control device in the example, and FIG. 5 shows the operating status of the control device shown in FIG. It is.

17.17b...Magnet, 19...Bobbin, 1
9′... Coil, 21... Linear scale (position detection means), 22... Proximity switch (position detection means),
23...Linear scale head, 24 river driver, 2
5... Servo controller, 26... System controller, 27... Drive circuit, 28... Table position detection circuit, 29... Switch.

Claims (13)

[Claims] 1. An electronic component comprising a component supply table on which electronic components are mounted and moves back and forth from side to side on a main body base, a driving means for driving the table, and a transfer device for transferring the electronic components on the table to a predetermined position. In the mounting device, the drive device includes a stationary part having a magnet means provided on the same straight line on the main body base, and a magnet means provided at a lower part of the component supply table so as to face the magnet means of the stationary part. What is claimed is: 1. An electronic component mounting device comprising a linear motor having a movable part, the component supply table being controlled by a drive device by the linear motor to position it at a predetermined position facing the transfer device. 2. The stationary part of the linear motor is formed by placing a pair of magnets spaced apart on the main body base, and the movable part of the linear motor is formed by inserting a coil protruding below the component supply table into the spaced part of the pair of magnets. An electronic component mounting device according to claim 1, comprising: 3. 2. The electronic component mounting apparatus according to claim 1, comprising: a position detection means for a component supply table; and a control device for moving and positioning the table to a predetermined position. 4. The control device controls each linear motor formed on the component supply table, and this control device includes a driver and a servo controller, a system controller provided above the servo controller, and a control device that controls each linear motor formed on the component supply table. 4. The electronic component mounting apparatus according to claim 3, further comprising: a drive circuit connecting said table position detecting means and said servo controller; and a position detecting circuit connecting said table position detecting means and said servo controller. 5. The component supply table has a component storage unit that sequentially sends out the components, and the transfer device sucks or grips the components on the dividing table and transfers them onto the board. 2. The electronic component mounting apparatus according to claim 1, further comprising an XY table for positioning the electronic component at a predetermined position. 6. An electronic component comprising a component supply table on which electronic components are mounted and moves back and forth from side to side on a main body base, a driving means for driving the table, and a transfer device for transferring the electronic components on the table to a predetermined position. In the mounting device, the table is composed of a plurality of divided tables, and the driving device includes a stationary part having a magnet means provided on the same straight line on the main body base, and a magnet means of the stationary part under each of the divided tables. and a movable part having magnet means provided so as to face the transfer device, and each divided table is individually controlled by a drive device using the linear motor to position it at a predetermined position facing the transfer device. An electronic component mounting device characterized by: 7. The stationary part of the linear motor is formed by placing a pair of magnets spaced apart on the main body base, and the movable part of the linear motor is formed by inserting a coil protruding below each split table into the spaced part of the pair of magnets. An electronic component mounting device according to claim 6, which is formed by: 8. 7. The electronic component mounting apparatus according to claim 6, wherein the magnet means of the stationary part of the linear motor are arranged densely in the vicinity of the transfer device and sparsely arranged in positions away from the transfer device. 9. Claim 6, wherein the magnet means of the stationary part of the linear motor is arranged such that a magnet having a high coercive force is arranged near the transfer device, and a magnet having a low coercive force is arranged at a position away from the transfer device. electronic component mounting equipment. 10. 7. The electronic component mounting apparatus according to claim 6, comprising: a position detection means for a dividing table located at a position facing the transfer device; and a control device for moving and positioning the dividing table to a predetermined position. 11. The position detecting means for the dividing table located at a position facing the transfer device is configured with a high-resolution linear scale, and the proximity detection means is configured to detect the position of a dividing table other than the dividing table located at a position facing the transfer device. Claim 1 having a switch or a low resolution linear scale
The electronic component mounting device described in item 0. 12. The control device controls each linear motor formed in each division table, and includes at least two sets of drivers and servo controllers, a system controller provided above the servo controllers, and a system controller provided above the servo controllers. a drive circuit that connects the driver and the linear motor; a position detection circuit that connects the position detection means of each divided table with the servo controller; and a switching connection between the drive circuit and the linear motor of each divided table and the position detection. 11. The electronic component mounting apparatus according to claim 10, further comprising a switch for switching connection between the circuit and the position detection means of each division table. 13. Each dividing table has a component storage unit that sequentially sends out the components, and the transfer device sucks or grips the components on the dividing table and transfers them onto the board. 7. The electronic component mounting apparatus according to claim 6, further comprising an XY table for dimensionally positioning at a predetermined position.