JPH06164197A - Printed board positioning device - Google Patents

Abstract

PURPOSE:To provide a device that enables large or small printed boards having various sizes to swiftly move from a stand-by area to an operation area in an electronic component mounting device that mounts electronic components on a printed board. CONSTITUTION:A first stopper 3a and a first sensor 4, a second stopper 5a and a second sensor 6, and a third sensor 7 are disposed along a conveyor 2 that transfers a printed board 1. Transfer means 16, 18, 21 and 22 are disposed for transferring the first stopper 3a and the first sensor 4 and the third sensor 7 in the direction of the transfer of the conveyor 2 relative to the second stopper 5a and the second sensor 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board positioning device for positioning a printed circuit board in a standby area or a working area when electronic parts are mounted on the printed circuit board while the printed circuit board is being conveyed by a conveyor. It is about.

[0002]

2. Description of the Related Art When an electronic component is mounted on a printed circuit board by an electronic component mounting apparatus or cream solder is applied by a screen printing apparatus, the printed circuit board is positioned by a conveyor in a standby area or a work area, and A board detection sensor is provided downstream of the work area to confirm that the printed board on which a predetermined work such as mounting of electronic components and application of cream solder has been completed has been carried out from the work area.

FIG. 8 is a plan view of a conventional example for positioning a printed circuit board in a standby area or a work area. The printed circuit board 1 has a large size and is conveyed to the right by the conveyor 2. Along the conveyor 2, the first stopper 3
a and the first sensor 4, the second stopper 5a and the second
Sensor 6 and each third sensor 7 are provided. The stoppers 3a and 5a are cylinder rods, and the sensors 4, 6 and 7 are optical sensors. First stopper 3
a stops the printed circuit board 1 in the standby area A, the second stopper 5a stops the printed circuit board 1 in the work area B, and the third sensor 7 operates in the work area B to mount electronic components and apply cream solder. It is detected that the finished printed circuit board 1 is completely carried out from the work area B. Next, the operation will be described.

With the stoppers 3a and 5a protruding upward and the printed circuit board 1 being stopped in the standby area A and the work area B, work such as mounting the electronic component P and applying cream solder is performed in the work area B. . When the work is completed, the stopper 5a retracts downward, and the printed circuit board 1 is carried out to the right. Then, the third sensor 7 detects the front end portion of the printed circuit board 1, and the printed circuit board 1 moves to the work area B.
When it is confirmed that the printed board 1 has been completely unloaded from the first stopper 3a, the first stopper 3a is retracted downward and the printed circuit board 1 waiting in the waiting area A is conveyed rightward, and the second stopper 5a
Projects upward and stops the printed circuit board 1 in the work area B. In addition, the tip of the printed circuit board 1 is connected to the second sensor 6
Is detected, the first stopper 3a projects upward and returns to the original state. By repeating the above operation,
Predetermined work on the printed circuit board 1 is performed one after another.

[0005]

FIG. 9 shows a case where a small-sized printed board 8 is positioned by changing the kind of the printed board. In this case, as in the previous case,
The printed circuit board 8 is positioned in the standby area A and the work area B by the stoppers 3a and 5a, and when the third sensor 7 detects the front end portion of the printed circuit board 8 after the predetermined work is completed, the first stopper 3a. Is evacuated to the waiting area A
The printed circuit board 8 is transported to the work area B.

In this case, however, the distance L2 between the printed circuit boards 8 stopped in the standby area A and the work area B is considerably larger than the distance L1 between the large-sized printed circuit boards 1 shown in FIG. It takes a longer time than necessary to convey the printed circuit board 8 from the work area B to the work area B, and there is a problem that the work efficiency is not increased by that much.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a printed board positioning device capable of quickly carrying printed boards of various sizes from a standby area to a work area.

[0008]

To this end, the present invention provides a first stopper and a first sensor, a second stopper and a second sensor, and a third stopper along a conveyor that conveys a printed circuit board. A first stopper, a first sensor and a third sensor, and a second stopper and a second sensor.
The moving means for moving the sensor in the conveying direction of the conveyor is provided.

[0009]

According to the above construction, when the type of the printed circuit board is changed, the moving means is driven to operate the first stopper and the first sensor and the third sensor, and the second stopper and the second sensor. The distance between the first stopper and the second stopper can be set to the minimum necessary by moving the sensor closer to or away from the sensor, and the printed circuit board can be quickly transported from the standby area to the work area.

[0010]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a perspective view of an electronic component mounting apparatus, and FIG. 2 is a front view. The same parts as those of the conventional example shown in FIGS. 8 and 9 are designated by the same reference numerals. Reference numeral 11 denotes a transfer head that vacuum-sucks the electronic component P to the nozzle 12 and mounts it on the printed circuit board 1, and is held at the tip of the Y table 13. Reference numeral 14 denotes an X table orthogonal to the Y table 13. When the X table 14 and the Y table 13 are driven, the transfer head 11 moves in the X direction and the Y direction, and the electronic component P provided in the parts feeder 15 is provided. Are mounted on the printed circuit board 1. Below the X table 14 and the Y table 13, a positioning device for the printed circuit board 1 described below is arranged.

First stopper 3a and second stopper 5a
Are rods of the cylinders 3 and 5, which are installed on the first nut 16 and the bracket 17, respectively. The first nut 16 is provided with the cylinder 3 and the first sensor 4. Further, the bracket 17 is provided with the second sensor 6 together with the cylinder 5. Further, the third sensor 7 is provided on the second nut 18. The bracket 17 is fixed on the fixed block 19.

The first nut 16 and the second nut 18 are screwed into a common ball screw 21. A right screw 21a is formed on the left half of the ball screw 21, and the first nut 16 is screwed onto the right screw 21a. A left screw 21b is formed on the right half of the ball screw 21,
The second nut 18 is screwed into the left screw 21b. The ball screw 21 rotates by being driven by the motor 22, but the right screw 21a and the left screw 21b are formed in opposite directions. Therefore, when the ball screw 21 rotates, the first nut 16 and the second screw 21b are rotated. The nuts 18 move the same amount in opposite directions along the ball screw 21. That is, these components 16, 18, 21, 22 are provided with stoppers 3a,
4 a constitutes a moving means for moving the printed board 1 by the conveyor 2. In this way, if the two nuts 16 and 18 are moved by the same ball screw 21 in opposite directions simultaneously and by the same amount,
The positions of the nut 16 and the nut 18 can be adjusted quickly, easily and accurately. 20 is a ball screw 21
Is a guide rod provided in parallel with the nut 16,
18 is inserted.

Reference numeral 23 is a bracket for mounting the motor 22, 24 is a fixed block for the bracket 23, 25 is a bearing at the right end of the ball screw 21, 26 is a mounting bracket for the bearing 25, and 27 is a fixed block for the bracket 26. It is also possible to provide a handle instead of the motor 22 and manually rotate the ball screw 21. The ball screw 21 is arranged below the conveyor 2 in parallel with the conveyor 2, and when the cylinders 3 and 5 are operated, the stopper 3 is provided.
a and 5 a project and sink in the transport path of the printed circuit board 1. Next, the operation will be described with reference to FIGS. 3 and 4.

FIG. 3 is a plan view showing a state in which the large size printed circuit board 1 is positioned. L is the distance between the printed circuit board 1 in the standby area A and the printed circuit board 1 in the work area B. From the standby area A to the work area B, the printed circuit board 1
The interval L is small so that the vehicle can be moved quickly. At this time, the nuts 16 and 18 are in the positions shown by the solid lines in FIG. Now, the printed circuit board 1 has stopped by hitting the first stopper 3a and the second stopper 5a. Now, when mounting of the electronic component P by the transfer head 11 on the printed circuit board 1 located in the work area B is completed, the second stopper 5a is retracted and retracted downward. Then, the printed circuit board 1 is conveyed to the right. When the tip portion of the printed board 1 is detected by the third sensor 7, it is confirmed that the printed board 1 is completely carried out from the work area B. Then, the first stopper 3a is retracted below the conveyor 2, the printed circuit board 1 waiting in the waiting area A is conveyed toward the work area B, and the second stopper 5a is projected upward and the printed circuit board 1 Stop 1 in work area B. When the tip of the printed circuit board 1 is detected by the second sensor 6, the first stopper 3a
Projects upward and returns to its original state. The control of the cylinders 3 and 5 is performed by a computer.

FIG. 4 shows a change in the type of printed circuit board.
It is a top view of the state where the small size printed circuit board 8 is positioned. In this case, the nut 16 and the nut 18 are brought closer to the second stopper 5a by rotating the motor 22 in the reverse direction in FIG. 2 (see the chain line in the figure). Then,
The distance L between the printed circuit board 8 in the standby area A and the printed circuit board 8 in the work area B can be minimized as in the case shown in FIG. The method for mounting the electronic component P on the small-sized printed circuit board 8 is the same as that for the large-sized printed circuit board 1, and when the mounting of the electronic component P on the printed circuit board 8 in the work area B is completed, the printed circuit board 1 Is transported to the right, and the printed circuit board 8 waiting in the waiting area A is sent to the work area B. In this case, since the positions of the nut 16 and the nut 18 are adjusted as described above to reduce the interval L, the printed circuit board 8
Promptly move from standby area A to work area B,
The mounting of the electronic component P on the printed circuit board 8 can be started.

5 to 7 show another embodiment of the present invention. The first cylinder 3 and the first sensor 4 are block 3
It is installed on 1. Reference numeral 32 denotes an endless belt, which is belted to a pulley 34 that is driven by a motor 33 to rotate. As shown in FIG. 6, the block 31 is supported by the lower running portion of the endless belt 32 via a support column 35 and a mounting plate 36. Further, as shown in FIG. 7, the third sensor 7 is installed on the block 37. The block 37 is supported by the upper running portion of the endless belt 32 via a column 38 and a mounting plate 39. Therefore, when the motor 33 drives to rotate the endless belt 32, the blocks 31 and 3 are rotated.
7 move in the opposite directions by the same amount and move toward and away from the central cylinder 5. Therefore, when the type of printed circuit board is changed, the motors 33 are driven so that the distance L between the printed circuit board 8 in the standby area A and the printed circuit board 8 in the work area B is minimized as much as possible. The position can be adjusted. As described above, various specific configurations of the moving means of the stoppers 3a and 5a are possible. Further, although the above embodiment has been described by taking the case where the electronic component P is mounted on the printed circuit boards 1 and 8, the present invention can be applied to other devices such as a screen printing device that applies cream solder to the printed circuit boards.

[0018]

As described above, according to the present invention, when the type of printed circuit board is changed, the moving means is driven to move the first stopper, the first sensor and the third sensor to the second stopper. The distance between the first stopper and the second stopper can be set small by approaching or separating the stopper and the second sensor so that the printed circuit board can be quickly transported from the standby area to the work area. Therefore, the predetermined work on the printed circuit board can be performed more quickly.

[Brief description of drawings]

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

FIG. 2 is a front view of the electronic component mounting apparatus according to the first embodiment of the present invention.

FIG. 3 is a plan view of the substrate positioning apparatus according to the first embodiment of the present invention.

FIG. 4 is a plan view of the board positioning apparatus according to the first embodiment of the present invention.

FIG. 5 is a plan view of a board positioning device according to a second embodiment of the present invention.

FIG. 6 is a partial sectional view of a substrate positioning device according to a second embodiment of the present invention.

FIG. 7 is a partial sectional view of a substrate positioning device according to a second embodiment of the present invention.

FIG. 8 is a plan view of a conventional printed circuit board positioning device.

FIG. 9 is a plan view of a conventional printed circuit board positioning device.

[Explanation of symbols]

 1 Printed Circuit Board 2 Conveyor 3a First Stopper 4 First Sensor 5a Second Stopper 6 Second Sensor 7 Third Sensor 8 Printed Circuit Board 16 Nut (Movement Means) 18 Nut (Movement Means) 21 Ball Screw (Movement) 22) motor (moving means) 32 endless belt (moving means) 33 motor (moving means) 34 pulley (moving means)

Claims (1)

[Claims] 1. A conveyor for carrying a printed circuit board, and a first stopper, a second stopper, and a third stopper, which are provided along the conveyor in order to be spaced apart from each other, each stopper being a first stopper. A first sensor, a second sensor and a third sensor, each sensor detects the presence or absence of a printed circuit board at a predetermined position, and activates the corresponding stopper according to the result, The second stopper is a printed circuit board positioning device that is movable along the conveyor with respect to the third stopper.