JPH07154085A - Parts feeder - Google Patents

Abstract

PURPOSE:To suppress vibration when a plurality of moving tables are moved while mounting a parts feeding unit, respectively, in order to feed the parts. CONSTITUTION:A next reel number is read out from an NC data and a moving table 11B on the suction side is moved. The moving table 11A on the following side is started to move at first if the moving direction is forward thus synchronizing the acceleration timing on the suction side with the deceleration timing on the following side. If the moving direction is rearward, the acceleration time on the following side is synchronized with the deceleration timing on the suction side thus suppressing the vibration. Consequently, the moving table 11B on the suction side is controlled to stop a parts feeding unit 10 of next reel number at the take-out position a suction nozzle 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of moving tables in which a group of parts supplying units for supplying electronic parts to be mounted on a predetermined printed circuit board can be independently moved back and forth on the same path by a driving device. The present invention relates to a component supply device that separately mounts and moves each table so that an electronic component can be supplied from a desired component supply unit to a component extraction position of a component extraction nozzle to supply an electronic component.

[0002]

2. Description of the Related Art A component supplying device of this type is disclosed in Japanese Patent Laid-Open No. 4-369.
As disclosed in Japanese Patent No. 294, a plurality of supply tables, which are moving tables on which the component supply units are mounted, are provided, and each of them is independently movable. In such a component supply device, there are various mounting modes of the component supply unit on the moving table, but if there are many types of electronic components to be mounted on a predetermined printed circuit board, one component cannot be mounted on one table. In some cases, a unit for supplying electronic components to be mounted on the board is separately mounted on a plurality of tables.

[0003]

However, in the prior art, since the weight of each of the component supply units is heavy, when a plurality of moving tables are moved simultaneously with a large number of the units being mounted, a large vibration occurs, and the tables are moved. There is a drawback in that the life of the drive system is shortened and the operation related to suction and mounting of electronic components is adversely affected.

Therefore, an object of the present invention is to reduce the vibration when the component supply units are mounted on a plurality of moving tables, respectively, and are moved for component supply.

[0005]

For this reason, according to the present invention, a plurality of component supply unit groups for supplying electronic components to be mounted on a predetermined printed circuit board can be independently reciprocated on the same path by a driving device. In the component supply device that supplies the electronic components by moving each table so that the electronic components can be supplied from the desired component supply unit to the component extraction position of the component extraction nozzle separately mounted on the movement table When another moving table is located in the moving direction of the table when the moving table on which the parts supply unit for supplying the parts to the nozzle is mounted is moved, the other moving table is moved first to move the moving table. Control means for controlling each of the driving devices so as to start and move a moving table to be supplied with components when decelerating another table. Those digits.

Further, according to the present invention, a component supply unit group for supplying electronic components to be mounted on a predetermined printed circuit board is divided into a plurality of movable tables, each of which can be reciprocally moved on the same path by a driving device. In the component supply device that supplies electronic components by moving each table so that electronic components can be supplied from the desired component supply unit to the component extraction position of the component extraction nozzle, at the component extraction position of the extraction nozzle When a moving table equipped with a component supply unit to be supplied is moved, if another moving table is located in a direction opposite to the moving direction of the table, the other table is moved with a delay and the parts should be supplied. A control means is provided for controlling each of the driving devices so as to accelerate the other table when decelerating the movement of the table.

[0007]

When the moving table carrying the component supply unit for supplying the component to the take-out position of the take-out nozzle moves, when the other moving table is located in the moving direction of the table, the control means takes the other action. The respective drive devices are controlled so that the moving table is moved first, and when the other table is decelerated, the moving table to be supplied with the components is started to be accelerated and moved.

Further, the control means is arranged such that, when the moving table carrying the component supply unit for supplying to the component taking-out position of the taking-out nozzle moves, another moving table is positioned in a direction opposite to the moving direction of the table. If the other table is moved, the respective driving devices are controlled so as to move the other table with a delay and accelerate the other table when decelerating the movement of the moving table for supplying the component.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an electronic component automatic mounting apparatus for mounting a chip-shaped electronic component 3 (hereinafter referred to as a chip component) on a printed circuit board 7, and a lower end peripheral edge of a rotary table 2 driven by a drive motor (not shown) to intermittently rotate. In the suction station I, the suction head 4 provided in the above section picks up and picks up the chip components 3 supplied by the component supply unit 10 described later by the suction nozzles 5 provided in plural in the head 4.

Reference numeral 6 denotes an XY table, which is moved in the horizontal direction (XY direction) by driving the X-axis motor 8 and the Y-axis motor 9 at the mounting station II reached by the suction head 4 by the rotation of the rotary table 2. Then, the chip component 3 is mounted at a predetermined position on the printed circuit board 7 placed on the table 6. 10 is the moving table 11 and the table 1
1 is a component supply unit arranged in the moving direction of 1. The desired moving unit 11 moves the desired unit 10 to the component take-out position of the suction nozzle 5 of the suction station I.

Reference numeral 13 is a recognition device for recognizing the attitude and position shift of the chip component 3 sucked by the suction nozzle 5.
Reference numeral 4 denotes a head rotation device that rotates the head 4 to bring the chip component 3 into a predetermined rotation angle position. A mechanism for driving the movement of the moving table 10 will be described with reference to FIGS. 1 to 3.

The moving table 10 is fitted between a pair of rollers 18 provided on the lower surface of the moving table 10 by a connecting lever 16 rotatably provided on the driving unit 15 being driven by a cylinder 17. By doing so, they are connected and movable along the guide rail 20. The drive unit 15 is movable along a guide rail 21 provided in parallel with the guide rail 20, and a nut 23 rotates inside a bearing portion 22 attached to the unit 15 by a drive motor 24 via a belt 25. However, since the nut 23 is fitted to the ball screw shaft 26 that does not rotate, the nut 15 moves along the ball screw shaft 26 so that the unit 15 moves. Therefore, the moving table 1 connected to the drive unit 15
0 can be moved.

In the component supply unit 10, a mounting pin 28 protruding from the lower surface of the unit 10 is fitted in a mounting hole 28 formed on the moving table 11, and a lock lever 30 is projected from the table 11. Lock plate 3
It is fixed on the table 11 by engaging with 1. Reference numeral 32 denotes a tape reel that is wound around a component storage tape and is attached to the rear of the component supply unit 10. The tape fed from the tape reel 32 is fed to the left in FIG. 2 by an intermittent feeding mechanism (not shown). The chip component 3 is supplied to the component supply position where the suction nozzle 5 can take it out. Reference numeral 33 is a cover tape reel that covers the upper surface of the component storage tape and winds the cover tape 34 peeled off by a predetermined fulcrum.

A component supply unit 1 for supplying various chip components 3 mounted on a predetermined single printed circuit board 7 placed on the XY table 6 on the moving table 11, respectively.
0 is mounted, and normally one supply unit 10 is 1
In order to supply different types of chip components 3, it is necessary to mount the same number of units 10 as the types to be mounted on the substrate 7. In this embodiment, the two moving tables 11 move on the guide rail 20 which is the same moving route.
Let 1A be the left moving table and 11B be the right moving table. Therefore, the drive unit 15 and the drive motor 2
There are also two sets of four, which are composed of a left drive unit 15A, a right drive unit 15B, a left drive motor 24A and a right drive motor 24B. In the following description, when it is necessary to distinguish between the left and right for convenience, the reference numerals of the moving table, the drive unit, and the drive motor will be denoted by A and B. The same applies to the figures.

The control block of this embodiment will be described with reference to FIG. 38 is a CPU as a control means,
Based on the data stored in the RAM 39, a given operation related to component mounting of the electronic component automatic mounting apparatus 1 is controlled according to a program (including the flowchart of FIG. 5) stored in the ROM 40. The CPU 38
A drive circuit 42 for driving the drive motor 24A and the motor B is connected to the drive circuit 41 via an interface 41.

In the RAM 39, the drive unit 15A has been used up to now.
It is stored in a predetermined area as to whether the component mounting unit 10 has mounted the component or the unit 10 of the drive unit 15B has mounted the component. RA
The M39 further stores NC data corresponding to each type of the board 7, and the NC data includes X data indicating the mounting coordinate position of the chip component 3 for each step number indicating the component mounting order, as shown in FIG. The Y data, the θ data, and the reel number indicating the position where the component supply unit 10 on which the chip component 3 to be mounted is mounted are stored. The θ data is data indicating the rotation angle position described above.

The reel number indicates the position where the component supply unit 10 of the moving table 11 is attached. In the case of this embodiment, "NO.
1 ”,“ NO. 2 ”, and so on, and one table 11 has 80 pieces (the narrowest unit 10).
Since the component supply unit 10 in (1) is attachable, the moving table 11A ends with "NO. 80", and the moving table 11B ends with "NO. 81" to "NO.
Up to 160 "are allocated.

In the flow chart of FIG. 5 and FIG. 7 showing the moving speed curve of the moving table, the moving table 11 is shown.
A is represented by "U1", the movable table 11B is represented by "U2", and the suction side is the movable table 11 on which the component supply unit 10 for supplying the chip component 3 to be taken out is mounted.
The follow-up side indicates the moving table 11 that is not the suction side. In addition, the regular timing is an initial time period during which the suction-side movement table 11 is described as one cycle and is a time period other than a period in which the suction nozzle 5 must be stopped for taking out components. The timing to move is shown. The preceding timing refers to the movement timing of the table 11 at which the moving table 11 on the following side starts moving earlier than the normal timing and its deceleration timing is almost the same as the acceleration timing of the movement at the normal timing. This is the timing of movement when the moving table 11 is in front of the moving table 11 on the suction side in the moving direction. The rear timing refers to the timing when the moving table 11 on the follower side is moved rearward in the moving direction with the start of the movement of the table 11 delayed so as to accelerate at substantially the same time as the deceleration time of the normal timing.

The horizontal axis of FIG. 7 represents time in the direction of the arrow, the vertical axis represents upward plus velocity, and the trapezoidal waveform at each timing is the acceleration at which the movement of the moving table 11 first shows a predetermined gradient. The acceleration and deceleration of the acceleration and deceleration are stopped at a predetermined gradient deceleration, and the acceleration and deceleration gradients and the maximum speed of the front timing and the rear timing are the same as those of the normal timing. The generated thrust is dispersed because the suction area of the moving table 11 on the suction side is displaced, and since the acceleration and deceleration of both tables 11 are synchronized, the generated thrust is canceled and vibration is suppressed to a small level. is there.

In the flow chart of FIG. 5, the fact that U1 and U2 are "regular" means that they are on the suction side and move at a high speed because they move at the normal timing, and "forward" means that they follow. Therefore, it means that the vehicle moves at a low speed at the previous timing, and “rear” means that the vehicle moves at a low speed at the later timing. What is cycle time? Suction head 4
Indicates the period of the operation of taking out the chip component 3 in the suction station. One cycle means that the suction nozzle 5 of one suction head 4 finishes sucking the chip component 3 and then the next suction head 4 moves. Is the period until the suction of the chip component 3 is completed, and is the time for intermittent rotation of the rotary table 2. Therefore, the time other than the normal timing during one cycle in FIG. 7 is a time zone in which the suction-side moving table 11 is stopped for suctioning the chip component 3 of the suction nozzle 5.

The reading of the step number in the flowchart of FIG. 5 is performed before the end of the normal timing, and the determination of the flowchart of FIG. 5 that determines the operation of the next cycle is C.
It is performed by the PU 38 until the normal timing ends. The operation will be described below with the above configuration. In this embodiment, both moving tables 11 are mounted in order to mount many kinds of chip components 3 on one substrate 7.
A case where the component supply unit 10 for this purpose is mounted on A and 11B and 160 component supply units 10 are mounted will be described.

First, when an operation section (not shown) is operated to start automatic operation of the electronic component automatic mounting apparatus 1, the RAM 3
The mounting operation of the chip component 3 is performed according to the NC data of FIG. That is, first, the reel number 1 of step number 1 is read, but if the current position of the moving table is the position of reel number 1, the chip component 3 is taken out from the component supply unit 10 as it is. The RAM 39 stores that U1 is currently on the suction side. The moving table 11B is the moving table 11
It is waiting with a small distance from A.

Next, the reel number 2 of the next step number 2 is read out until the end of the normal timing of this cycle time (the same timing when the table 11 does not move but the table 11 moves), and FIG. The determination is made by the CPU 38 according to the flowchart of FIG. That is, U1
Since (the moving table 11A is also referred to as U1 hereinafter) is currently on the suction side, the current reel number "1" is smaller than the next reel number "2", and the next reel number is U2.
Since the movement table 11B is not also referred to as U2 below, it is determined that U1 should be moved at regular timing and U2 should be moved at later timing.

Next, the suction nozzle 5 sucks the chip component 3. Just before this operation is finished and the next cycle is started, the moving table 11A drives the drive motor 24A at the regular timing to the left side of FIG. The movement starts when the drive unit 15A moves. Next, table 11
Almost at the same time when A starts decelerating, the moving table 11B starts moving when the driving motor 24B is driven and the driving unit 15B moves to the left side of FIG. 1 at a later timing, and the thrust is dispersed and cancels each other to cause vibration. However, the table 11 is moved less than when both tables are moved at the regular timing.

The moving table 11A at the regular timing is stopped moving first and the chip component 3 is sucked.
Both tables 11A and 11B are stopped with almost no gap. The suction head 4 having the suction nozzle 5 that has sucked the chip component 3 moves from the suction station I by the intermittent rotation of the rotary table 2 and the recognition device 1
The chip component 3 is recognized by 3 and the angular position is corrected by the head rotation device 14, and the NC data of the printed circuit board 7 placed on the table 6 is moved by the movement of the XY table 6 in the mounting station II. The component 3 is mounted at the predetermined position shown.

In this way, the chip component 3 is sucked and mounted on the printed board 7 according to the NC data. For example, the current reel number is "30" and the next reel number shown in the NC data is "30". If it is "25", it is currently U1, the next reel number is smaller, and the next reel number is not U2.
It is determined that 1 is the normal timing and U2 moves at the previous timing.

In this way, the operation is as follows. That is, the suction nozzle 5 first sucks the chip component 3, but in parallel with this operation, the moving table 11B starts moving to the right side in FIG. 1 at the previous timing before the next cycle starts. Next, the moving table 11A starts accelerating in synchronization with the deceleration of the moving table 11B and moves to the right side in FIG. 1. However, since the moving table 11B has already moved, it moves at regular timing without collision. .

Both tables 11A and 11B stop with almost no gap, and the component supply unit 10 of reel number 2 stops at the component pick-up position of the suction nozzle 5. Next, when the current reel number is "75" and the next reel number is "82", the suction side moves from U1 to U2, so that U1 moves at the previous timing and U2 moves at the regular timing. The CPU 38 makes a decision, and the moving table 11 moves in accordance with this decision as described above.

Next, when the current reel number is "90" and the next reel number is "92", U1 is moved at the previous timing and U2 is moved at the regular timing according to the flowchart of FIG. The CPU 38 makes a decision, and the moving table 11 moves in accordance with this decision as described above. The operation is continued while moving in the same manner, but, for example, the reel number "103" to the reel number "10"
If the next reel number is "105", that is, if the follower side has moved at a later timing until then, and it moves in the opposite direction, and the attraction side is the same, the later timing Since the movement must be started as the advance timing before the end of, the rotary table 2 is stopped and the start time of the cycle time is extended to a time when the advance timing is possible. Good.

In this embodiment, two movable tables 11 which can be independently moved have been described. However, when there are three or more independently movable tables 11, the suction side movable table is It is also possible to move the table at the normal timing at a high speed, move the other moving table on the follower side after the moving direction at the later timing, and move the table to move earlier at the earlier timing.
Some of the followers may be moved at regular timing.

[0031]

As described above, according to the present invention, when the moving table equipped with the component supply unit for supplying the component to the take-out position of the take-out nozzle is moved, another moving table is provided at the time of accelerating or decelerating the table for moving the component. The movement of the table can be decelerated or accelerated to disperse or cancel the thrust of the table movement, and the vibration accompanying the movement of the table can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view of an electronic component automatic mounting apparatus to which this embodiment can be applied.

FIG. 2 is a side view showing a moving mechanism of a moving table.

FIG. 3 is a partially cutaway front view showing a moving mechanism of a moving table.

FIG. 4 is a control block diagram of the present invention.

FIG. 5 is a diagram showing a flowchart.

FIG. 6 is a diagram showing NC data.

FIG. 7 is a diagram showing timing regarding movement of a movement table.

[Explanation of symbols]

 3 Chip-shaped Electronic Components (Electronic Components) 5 Adsorption Nozzle (Ejection Nozzle) 7 Printed Circuit Board 10 Component Supply Unit 11 Moving Table 24 Drive Motor (Drive Device) 38 CPU (Control Means)

Claims (2)

[Claims] 1. A desired component supply unit group for supplying electronic components to be mounted on a predetermined printed circuit board is separately mounted on a plurality of movable tables which are independently reciprocally movable on the same path by a driving device. In the component supply device that supplies electronic components by moving each table so that electronic components can be supplied from the component supply unit to the component extraction position of the component extraction nozzle, component supply that supplies electronic components to the component extraction position of the extraction nozzle When another moving table is located in the moving direction of the moving table on which the unit is mounted, the other moving table should be moved first and parts should be supplied when decelerating the other table. A component supply device provided with control means for controlling each of the drive devices so as to start and move the moving table. . 2. A component supply unit group for supplying electronic components to be mounted on a predetermined printed circuit board is separately mounted on a plurality of moving tables which can be reciprocally moved on the same path by a driving device, respectively, and mounted. In the component supply device that supplies electronic components by moving each table so that electronic components can be supplied from the component supply unit to the component extraction position of the component extraction nozzle, component supply that supplies electronic components to the component extraction position of the extraction nozzle When another moving table is located in the direction opposite to the moving direction of the moving table on which the unit is mounted, the other moving table is moved with a delay to move the moving table to which parts are to be supplied. A component supply device comprising control means for controlling each of the drive devices so as to accelerate the other table during deceleration.