JPH059329B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for reversing printed circuit boards, and particularly for reliably reversing and transporting printed circuit boards in working conditions where the angle and height are different before and after reversing. It has been made possible to do so.

Generally, when fixing chip parts such as resistors and capacitors on a printed circuit board, the chip parts are first attached to the printed circuit board using an adhesive, and then the adhesive is cured in a drying oven to temporarily form the chip parts. Fix it. Thereafter, the printed circuit board is turned in half, transferred to a solder bath, and soldered by bringing the solder jet into contact with the chip temporary fixing surface to complete the final fixing of the chip components. After that, the printed circuit board is turned over again and stored in the stocker. In such a process, conventionally, the above-mentioned printed circuit board is reversed manually or even when it is performed using a reversing device, simply by rotating the printed circuit board 180 degrees while maintaining the same height before and after reversing. It was a good structure.

The present invention provides a reversing device that can reliably invert and hand over a printed circuit board to the next process even when the receiving and delivery positions and angles of the printed circuit board are different before and after the reversal. will be explained based on the attached drawings.

In the figure, A is a conveyor that horizontally conveys the printed circuit board. For example, the printed circuit board 1 is passed through a drying oven to harden the adhesive for temporarily fixing the chip components onto the printed circuit board, and then transported out. B
1 is a stocker for temporarily stocking the printed circuit boards conveyed by the conveyor A, and C is a soldering device for printed circuit boards, in which a large number of gripping claws 2 are arranged on an endless belt, and the printed circuit boards 1 are faced to each other. It has a claw conveyor 3 that can grip and convey from any direction,
The printed circuit board is transported with the chip component mounting surface facing down, and during the transport, flux application and soldering by contact with a solder jet are performed. When the solder jet is brought into contact with the lower surface of the printed circuit board, there is an optimum conveyance angle to minimize soldering defects, and for this purpose the claw conveyor 3 has a certain inclination. The printed circuit board loading position of the claw conveyor 3 is located at a position considerably lower than the position of the conveyor A in order to balance the height of the entire apparatus and to prevent the height of the apparatus from becoming unnecessarily high. D is a reversing device in which printed circuit board 1 is pushed out from stocker B by pusher 5.
is received in the same position, is reversed and rotated to an angle that matches the conveyance angle of the claw conveyor 3 of the soldering device C, and the printed circuit board is lowered, and the printed circuit board is moved to the delivery position and the claw conveyor 3. The receiving positions of the soldering device C are automatically reversed and conveyed from the stocker B to the soldering device C so that the receiving positions of the soldering devices coincide with each other.

Next, the printed circuit board reversing device will be explained in more detail.

In the figure, reference numerals 4 and 4 refer to guides which receive the printed circuit board 1 pushed out from the stocker B to the pusher 5 substantially horizontally in the same position, and support the printed circuit board 1 by sandwiching both ends thereof. Reference numeral 5 denotes a rotating shaft that supports one end of the guides 4, 4 and rotates the guides 4, 4. The guides 4, 4 are fixed in the rotational direction of the rotating shaft 5, but movable in the axial direction. It is configured to be compatible with printed circuit boards of different widths.
Reference numeral 6 denotes a lifting block that rotatably supports the rotating shaft 5, and the lifting block 6 includes the rotating shaft 5.
A motor 7 is attached to drive the rotation.
Reference numeral 8 denotes an elevating guide that supports the elevating block in a vertically movable manner, and a hole 6a provided in the elevating block 6.
It is embedded in Reference numeral 9 denotes a cylinder that provides driving force to move the lifting block 6 up and down, and 9a is its rod.

In the above configuration, the guide 4 that has received the printed circuit board 1 from the stocker B is rotated to the dotted line position in FIG. 2 by the rotation of the rotating shaft 5 by the motor 7. That is, the printed circuit board 1 is rotated to an angle that matches the inclination angle of the claw conveyor 3 of the soldering device C, thereby inverting the printed circuit board 1. Thereafter, the lifting block 6 is lowered by the driving means 9, and stops at a position where the reversed printed circuit board 1 can be transferred to the claw conveyor 3.

The rotation angle and rotation timing of the guide 4 are controlled by a control means (not shown), and the lifting amount and timing of the lift block 6 are controlled by a lifting control means (not shown). Unlike,
It is also possible to rotate the guide 4 and raise and lower the lifting block 6 at the same time.

FIG. 3 shows a reversing device D installed at the rear of the soldering device C. In this case, the guide 4 waits at an angle and position that matches the claw conveyor 3 of the soldering device C, and the vertical position of the lifting block 6 is adjusted. The guide 4 rotates as it is without changing much, rotates approximately 180 degrees, turns the printed circuit board upside down, and stops in a horizontal state.

As described above, according to the present invention, it is possible to freely set the receiving position and angle of the printed circuit board and the delivery position and angle after reversal, and it is possible to freely set the receiving position and angle of the printed circuit board, regardless of the angle of the claw conveyor of the soldering device. Also, even if the height of the above-mentioned claw conveyor is different from the height of the conveyors before and after it due to the height balance of the entire system, this can be absorbed by the reversing device of the present invention without any worries, and the industrial The value is extremely great.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a fully automatic soldering system using a reversing device according to an embodiment of the present invention, Fig. 2 is a cutaway side view of the same main part, and Fig. 3 is a reversing device installed at the rear of the soldering device. FIG. 1... Printed circuit board, 4... Guide, 5... Rotating shaft, 6... Lifting block, 7... Motor, 8...
... Lifting guide, 9... Drive means.

Claims (1)

[Scope of Claims] 1. A pair of guides that guide a printed circuit board that has been transported at a predetermined angle along the predetermined transport direction and hold the printed circuit board, and one end of this guide, and a rotating shaft that is located substantially perpendicular to the conveying direction of the printed circuit board and rotatably supports the guide so as to be able to reverse the printed circuit board; a lifting block that rotatably supports the rotating shaft; a fixed motor that rotationally drives the rotating shaft; a control means that controls the rotation of the motor to control the rotation timing, rotation start point and rotation end point of the guide; and a lifting guide that supports the lifting block so as to be able to rise and fall. , a driving means for driving the lifting block in the vertical direction, and a lifting control means for controlling the driving means to control the raising/lowering timing and position of the lifting block, and controlling the loading position and loading angle of the printed circuit board. , a printed circuit board reversing device that makes the unloading position and unloading angle of the printed circuit board variable after reversing. 2. The printed circuit board reversing device according to claim 1, wherein the rotating shaft allows the guide to move only in the axial direction, and the interval between the guides is variable in accordance with the width of the printed circuit board.