JPH04286198A - Positioning carrying method for substrate - Google Patents

Abstract

PURPOSE:To provide a positioning carrying method of a substrate shortening substrate-exchange workhours and improving productivity of a mounting machine as a whole. CONSTITUTION:In the positioning and carrying of a printed board 7 for an electronic-part mounting machine, the printed board 7 conveyed by a conveyor 23 is carried in and out to/from two XY tables 15, 21 corresponding to two shifters 24 by the shifters 24, and the two XY table 15, 21, on which the printed board 7 is loaded, are positioned alternately and an electronic part is mounted. The next printed board 7 is carried into the other XY tables 15, 21 during a time when the electronic part is mounted to the printed board 7 in one XY tables 15, 21, and mounting to the next printed board 7 can be started immediately after mounting to the preceding printed board 7 is completed, thus minimizing loss time.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for positioning and transporting a printed circuit board in a mounting machine for mounting electronic components on a printed circuit board.

0002

2. Description of the Related Art In recent years, board positioning and transport methods have not been able to shorten the transport time despite improvements in the mounting speed of mounting machines, and there is a need to shorten the transport time in order to improve the operating rate.

An example of the above-mentioned conventional positioning and conveying method will be explained below with reference to the drawings. Figures 5 to 6
, the component supply table 1 has a plurality of component supply devices 2, which are positioned so that a predetermined electronic component 3 is attracted to the nozzle 5 of the main shaft 4. The nozzle 5 sends the picked up electronic component 3 to the component posture regulating device 6 through intermittent rotational movement of the main shaft 4, and the electronic component 3 regulated here is then mounted on a printed circuit board 7 after rotating in a predetermined angular direction. . The printed circuit board 7 is fixed to an XY table 9 by a fixing metal fitting 8. The XY table 9 positions the printed circuit board 7 under the nozzle 5 on which the electronic component 3 is to be mounted by rotating the ball screw 10. Loader 1
Reference numeral 1 waits for the next board 12 that has been carried into this apparatus from the previous process, and the unloader 13 carries out the board after mounting. The board transfer device 14 is for transferring the printed circuit boards 7 and 12 from the loader 11 to the XY table 9 or from the XY table 9 to the unloader 13.

In the electronic component mounting apparatus configured as described above, the electronic component 3 is mounted on the board 7 by the operation of the main shaft 4, as shown in FIG. 6(A). At this time, the following group 1
2 is waiting at the loader 11. In addition, (B) in FIG.
As shown in (C), when the mounting on the board 7 is completed, the board 7 is carried out to the unloader 13, and the board 12 is carried in from the loader 11 to the XY table 9. During this time, the main shaft is in a stopped state and is in a non-operational state. Furthermore, in Figure 6 (
As shown in D), when the loading/unloading of the substrate 12 is completed, the loader 11 and the unloader 13 are retracted and the mounting operation is restarted.

[0005]

However, in the above configuration, from the end of mounting on the board 12 until the restart of mounting on the next board 12, 1. Travel time from the final mounting point of the XY table to the loading/unloading position of the board2. Loading/unloading time of board 3. The time taken to move the next board to the first mounting point occurs as a loss time.

Furthermore, as the number of points attached to the board 12 decreases, the time taken up by replacing the board increases, resulting in a decrease in productivity. In view of the above-mentioned problems, the present invention provides a method for positioning and transporting a board, which improves the board replacement work time and improves the productivity of the mounting machine as a whole.

[0007]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the method for positioning and transporting printed circuit boards of the present invention provides a method for positioning and transporting printed circuit boards in an electronic component mounting machine, in which a printed circuit board transported by a conveyor is transferred between two transfer plates. The device carries electronic components into and out of two corresponding XY tables, and the two XY tables on which printed circuit boards are mounted are alternately positioned to mount electronic components.

[0008]

[Operation] With the above configuration, while the printed circuit board is positioned on one XY table and electronic components are mounted, the printed circuit board is carried in and out of the other XY table, so the mounting on the previous printed circuit board is completed. rear,
It is possible to immediately move on to mounting on the next printed circuit board, and loss time can be reduced to a minimum.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Figure 1 shows an electronic component mounting machine to which a board positioning and transport method is applied, and members that perform the same actions as those shown in Figures 5 and 6 are given the same numbers and their explanations are omitted. .

In FIGS. 1 to 3, the first XY table 15 incorporates a two-dimensional linear motor as a drive source. The configuration model of this linear motor is as shown in Fig. 2, which consists of a platen 16, an X-axis forcer 17, and a Y-axis
A drive system is composed of an axis forcer 18, and an air jet nozzle 1 that floats the XY table 15 by air.
9 is provided, and a pneumatic pipe 20 for supplying compressed air is connected to the nozzle 19.

Similarly to the first XY table 15, the second XY table 21 is equipped with a two-dimensional linear motor, and the first and second XY tables 15, 21 are used to control the printed circuit board 7 to be mounted. is provided to be received from the conveyor 23 by a transfer device 24. The transfer device 24 also includes first and second XY tables 15,
One unit is provided corresponding to each of 21. Furthermore, in the middle of the conveyance path of the conveyor 23, a first
A stopper 25 and a second stopper 26 are provided, and the first stopper 25 performs a stopping operation when the printed circuit board 7 to be placed on the first XY table 15 is conveyed, and the second stopper 26 stops when the printed circuit board 7 to be placed on the second XY table 21 is conveyed.

[0012] Then, the first and second XY tables 1
5 and 21 are movable independently and without interfering with each other on the support 27, and furthermore, the support 27 has a built-in platen 16, which enables position detection.

The operation of the above configuration will now be explained. As shown in FIG. 3A, while the first XY table 15 is performing a positioning operation for mounting electronic components on the printed circuit board 7 placed thereon, the second XY table 21 is waiting for the (n+1)th printed circuit board 7 to be transferred from the conveyor 23 by the transfer device 24 at a position corresponding to the second stopper 26 .

Then, as shown in FIG. 3B, the spindle 4 stops when the mounting on the n-th printed circuit board 7 is completed, and the first XY table 15 moves to the first stopper 25.
At the same time, the second XY table 21 is moved to the mounting position and positioned, and mounting is immediately resumed. Further, on the first XY table 15, the n-th printed circuit board 7 is transferred to the conveyor 23 by the transfer device 24 and is carried out.

Then, as shown in FIG. 3(C), n+
When the second printed circuit board 7 is carried by the conveyor 23, it is positioned on the conveyor 23 by the first stopper 25, and is transferred to the first XY table 15 by the transfer device 24 and placed in a standby state. Furthermore, the second XY table 2
When the mounting on the (n+1)th printed circuit board 7 is completed, the second XY table 21 moves to a position corresponding to the second stopper 26, and the transfer device 24 transfers the printed circuit board 7 onto the conveyor 23. Furthermore, when the (n+1)th printed circuit board 7 is conveyed by the conveyor 23, the first stopper 25 is turned off, allowing the printed circuit board 7 to pass.

When the (n+3)th printed circuit board 7 is carried, the second stopper 26 is turned on to stop the printed circuit board 7, and the transfer device 24 prints it on the second XY table 21. The board 7 is transferred and placed in a standby state. The series of operations described above are all programmed, and the first and second XY tables 15, 21
It is registered in the ROM 28 above. This program is a flowchart as shown in FIG. In this embodiment, the ROM 28 is connected to the first and second XY tables 15.
, 21, however, it may be provided on the supporting portion 27, or the positioning command may be issued from outside.

As described above, if the configuration shown in this embodiment is adopted, the time spent replacing the printed circuit board 7 can be reduced from the end of mounting the previous printed circuit board 7 to the XY table 15 holding the next printed circuit board 7, 21 is only required to move from the standby place to the mounting point. This reduces the time spent on substrate loading and unloading operations and reduces the XY table movement time by half compared to the conventional method.

[0018]

As described above, according to the present invention, while electronic components are being mounted on a printed circuit board on one XY table, the next printed circuit board is carried into the other XY table, and the next printed circuit board is mounted on the previous printed circuit board. After the completion of the mounting, the mounting on the next printed circuit board can be started immediately, so that the loss time can be shortened to the minimum.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an electronic component mounting apparatus in an embodiment of the present invention.

FIGS. 2A and 2B are a perspective view and a cross-sectional view, respectively, showing the structure of a two-dimensional linear motor in the same embodiment.

FIG. 3A, FIG. 3B, and FIG. 3C are dynamic explanatory diagrams showing the process of loading and unloading a printed circuit board in the same embodiment.

FIG. 4 is a flowchart showing a program of the operation of the XY table in the same embodiment.

FIG. 5 is a perspective view of a conventional electronic component mounting apparatus.

FIGS. 6A, 6B, 6C, and 6D are process diagrams each showing a conventional board replacement operation.

[Explanation of symbols]

4 Main shaft 7 Printed circuit board 15 First XY table 21 Second XY table 23 Conveyor 24 Transfer equipment 27 Support part

Claims (1)

[Claims] Claim 1: In positioning and transporting a printed circuit board in an electronic component mounting machine, the printed circuit board transported by a conveyor is moved by two transfer devices to two corresponding Xs.
A method for positioning and transporting a board, characterized in that electronic components are mounted by loading and unloading onto and from a Y table and alternately positioning two XY tables on which printed circuit boards are mounted.