JPH10173399A - Method and apparatus for holding printed board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically move backup pins up and down according to various printed boards, without manual operation by providing cylinders attached to a back up plate to move backup pins vertically and changing the projection times of the backup pins according to the kind of board. SOLUTION: A controller contains information for driving cylinders 10, based on pre-programmed information of printed boards 3. When a code no. representing the order of printed boards held is inputted, an electromagnetic valve drive circuit selectively drives specified cylinders 10 according to a built-in programs to project only the selected backup pins 4. In case of holding a dissimilar model or printed board 3, code no. corresponding to the printed board 3 is inputted to the controller so as to move the backup pins vertically according to this board 3. Thus the backup pins vertically are automatically moved according to the printed board 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for holding a printed circuit board, and more particularly to a novel method for freely changing the position of a backup pin in accordance with a change in the type or type of a printed circuit board to be held. Regarding improvement.

[0002]

2. Description of the Related Art Conventionally, as a method of holding a printed circuit board in a chip mounter, an automatic component insertion machine, an appearance inspection device with solder, a board tester, and the like, as shown in FIGS. A plurality of backup pins 4 are inserted into the holes 2 formed in a matrix on the backup plate 1 so as to be at a position suitable for the printed circuit board 3 for holding the printed circuit board 3. I was going to put it. The backup plate 1 is provided, for example, at a substantially central position of the automatic component insertion machine 5 shown in FIG. 1, and supplies components from the parts cassette 6 to the printed circuit board 3.

[0003]

Since the conventional printed circuit board holding method is configured as described above, there are the following problems. In other words, the parts and wiring of the printed circuit board to be held are different from each other depending on the model and type of the printed circuit board. Therefore, it is necessary to change the position of the backup pin when holding the printed circuit board each time. Was done by acquisition. For this reason, the work is troublesome and sometimes causes a mistake.

[0004] The present invention has been made to solve the above problems, and in particular, a print in which the position of a backup pin can be freely changed in accordance with a change in the type or type of a printed circuit board to be held. It is an object of the present invention to provide a substrate holding method and apparatus.

[0005]

According to the present invention, there is provided a printed board holding method according to the present invention, wherein the printed board is held on a plurality of backup pins provided on the backup plate. In this method, a plurality of cylinders allow each of the backup pins to protrude and retract, and the number of the backup pins protruding is changed according to the type of the substrate.

A printed circuit board holding device according to the present invention is a printed circuit board holding device configured to hold a printed circuit board on a plurality of backup pins provided on a backup plate. And a drive source for driving each of the cylinders, so that each of the cylinders is selectively operated.

[0007] More specifically, a spring is provided in the cylinder to constantly urge the backup pin downward, and each of the cylinders is driven by air.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a method and apparatus for holding a printed circuit board according to the present invention will be described below with reference to the drawings. The same or equivalent parts as those in the conventional example will be described with the same reference numerals. 2 and 3, a reference numeral 1 denotes a backup plate, on which a plurality of cylinders 10 are mounted by screwing, and a backup pin 4 is attached to a piston 11 of each cylinder 10. Are provided so that they can come and go. A spring 12 made of a spring is provided between the piston 11 of each cylinder 10 and the end 10a, and the backup pins 4 are constantly lowered via the pistons 11, that is, the backup pins 4 are placed on the backup plate 1. Are urged to sink so as not to protrude. Each backup pin 4 is configured to penetrate through each hole 2 and protrude above the backup plate 1.

The holes 2 and the cylinders 10 are arranged in a matrix as shown in FIG.
0 is a driving source 2 for air (other media is also possible)
0 (not only air and oil, but also a power source when the cylinder 10 is an electromagnetic type) is connected via an electromagnetic valve 21 and each electromagnetic valve 21 is a control unit 22 comprising a CPU.
Is connected to an electromagnetic valve drive circuit 23 controlled by The medium may be oil as well as air, and the cylinder 10 may be of an electromagnetic type without using a medium.

Next, the operation will be described. First, the control unit 22 contains drive information of each cylinder 10 based on information of each printed circuit board 3 programmed in advance. In the above-described state, when a code number representing the order of the printed circuit boards 3 to be held is input to the control unit 22, the solenoid valve driving circuit 23 selectively operates each designated cylinder 10 according to a program stored in advance, and the selected cylinder 10 is selected. Only the backup pins 4 protrude, and the printed circuit board 3 can be placed on each backup pin 4 to mount and inspect chips and components.

When the following printed circuit board 3 of a different model or type is held, a code number corresponding to the printed circuit board 3 is input to the control unit 22 so that a backup suitable for the printed circuit board 3 is stored. Pin 4
Haunting is performed. Therefore, unlike the conventional case, there is no need to manually move the backup pin 4 in and out, and the control unit 2 is not required.
Only the input setting of the program in 2 can control the appearance of each backup pin 4.

[0012]

The method and apparatus for holding a printed circuit board according to the present invention are configured as described above, so that the following effects can be obtained. In other words, each backup pin can be automatically driven and automatically controlled by the control unit by using the power driven by the cylinder, so that the backup pin can be automatically inserted and removed according to various printed circuit boards without relying on humans. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an automatic component insertion machine to which a method and apparatus for holding a printed circuit board according to the present invention can be applied.

FIG. 2 is a configuration diagram showing a printed board holding device according to the present invention.

FIG. 3 is a perspective view of FIG. 2;

FIG. 4 is a perspective view showing a conventional backup plate.

FIG. 5 is a configuration diagram showing a conventional holding state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Backup plate 3 Printed circuit board 4 Backup pin 10 Cylinder 12 Spring 20 Drive source

Claims (3)

[Claims] A printed board holding method for holding a printed board (3) on a plurality of backup pins (4) provided on a backup plate (1), wherein the plurality of backup pins are provided on the backup plate (1). A method for holding a printed circuit board, wherein the respective backup pins (4) are made freely retractable by the cylinder (10), and the number of the projected backup pins (4) is changed according to the type of the board (3). 2. A printed board holding device adapted to hold a printed board (3) on a plurality of backup pins (4) provided on a backup plate (1), wherein the printed board is provided on the backup plate (1). A plurality of cylinders (10) having a backup pin (4) that can be freely retracted and provided, and a drive source (20) for driving each of the cylinders (10), and selectively operating each of the cylinders (10) A printed circuit board holding device, characterized in that the printed circuit board holding device is configured to perform the following. 3. A spring (12) for constantly biasing the backup pin (4) downward is provided in the cylinder (10), and each of the cylinders (10) is driven by air. 3. The printed circuit board holding device according to claim 2, wherein: