JPS63146488A - Printed board washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a printed circuit board cleaning device that cleans a soldered printed circuit board while holding it in a vertical position relative to a horizontal position. .

[Conventional technology]

In carrier-less soldering, after the electronic components are mounted on the printed circuit board, the printed circuit board is engaged with the engagement piece of the conveyor chain and conveyed horizontally, followed by flux treatment, preheating, soldering processing, and cleaning. All processes were performed at the same speed.

[Problem that the invention seeks to solve]

By the way, in the cleaning process of printed circuit boards, flux treatment, preheating, and soldering take more time than the other processes, so if the printed circuit boards are transported at the same speed, the cleaning time will be shorter when the printed circuit boards are cleaned by a cleaning device. turn into. Therefore, in order to perform sufficient cleaning, if the cleaning device is set long in the direction of conveyance of the printed circuit board,
Soldering has the problem that the entire device becomes large, and soldering requires a large space to install the device.

Further, since the printed circuit board is held horizontally by a conveyor chain for cleaning, there is a problem in that cleaning liquid adhering to the upper surface of the printed circuit board is difficult to drain.

This invention was made in order to solve the above problem, and the printed circuit board that has been conveyed in the horizontal direction is transformed from a horizontal position to a vertical position, and then a cleaning liquid is sprayed on the printed circuit board, thereby cleaning and running out of the cleaning liquid. An object of the present invention is to obtain a printed circuit board cleaning device that can sufficiently perform the following steps.

(Means for Solving the Problems) ゛The printed circuit board cleaning device according to the present invention includes a conveying device having means for sequentially horizontally conveying soldered printed circuit boards; means for converting the holding direction of a printed circuit board from a horizontal position to a vertical position; a means for conveying an odd-numbered printed circuit board in a vertical position to a subsequent stage; and a means for converting an even-numbered printed circuit board to a vertical position. a printed circuit board holding direction changing device equipped with a means for moving the printed circuit boards in a direction perpendicular to the conveyance direction in which the printed circuit boards are transferred from the printed circuit board to a subsequent stage; A plurality of cages are provided in a parallel direction with respect to the transport direction, a means for lowering and raising these cages, a cleaning tank for cleaning each of the printed circuit boards when the multi-current is lowered, and a cleaning tank for cleaning each of the printed circuit boards in each of the cages. It consists of: a cleaning device main body equipped with a means for sequentially feeding the cleaning device eight times;

[Effect]

In this invention, first, a soldered printed circuit board is held horizontally by a transfer device and sequentially transferred to a printed circuit board holding direction changing position, and then the printed circuit board is moved to a horizontal position by a printed circuit board holding direction changing device. After converting to the vertical position, the odd-numbered printed circuit boards in the vertical position are transported as they are to the cleaning equipment main body, and the even-numbered printed circuit boards in the vertical position are moved in a direction perpendicular to the transport direction before being transferred to the cleaning equipment main body. The printed circuit board is transported and cleaned by spraying cleaning liquid onto both sides of the printed circuit board in a vertical position using the main body of the cleaning device.

(Example) Figures 1 (a) to (C), Figures 2 (a) and (b).

Figures 3(a), (b), and 4 show an embodiment of the present invention; Figure 1(a) is a plan view, Figure 1(b) is a side view, and Figure 1(a) is a plan view. C) is a cross-sectional view taken along the line I-I in FIG. b) is a front view and a plan view showing the printed circuit board holding direction changing device, and FIG. 4 is a perspective view showing the main part of FIG. 1. In these figures, 1 indicates the entire printed circuit board cleaning apparatus. P is a printed circuit board on which electronic parts and chip parts are mounted.

2 is a conveying device for the printed circuit board P; 3 is a printed circuit board holding direction converting device (hereinafter simply referred to as a converting device) for vertically standing the printed circuit board P that is being conveyed horizontally; and 4 is a converting device for the printed circuit board; This is a main body of a cleaning device that cleans the printed circuit board P. In the conveyance device 2, reference numeral 5 denotes a conveyance chain as a means for horizontally conveying the printed circuit board P, and a protrusion (not shown) projecting horizontally from the conveyance chain 5 is provided in order to place the printed circuit board P thereon. . 6 is a fixed plate fixed to the transport device 2, 7 is a movable plate, 8 is a screw rod on the driving side into which the movable plate 7 is screwed;
9 is a handle fixed to the screw rod 8; 10 is a driven screw rod; 11 is a roller chain connecting the screw rods; 12 is a drive shaft for driving the conveyor chain 5;
3 is an elongated key that engages with the movable plate 7; 14 is a guide shaft; 15 is a motor that drives the drive shaft 12; 16 is an air cylinder provided in the upper and lower directions; 17 is a rod; 18
is a rodless air cylinder attached to the rod 17, and is provided horizontally and parallel to the conveyance direction of the printed circuit board P. 1 is a piston of the air cylinder 18, 20 is a guide shaft that guides the piston 19, 21 is placed on the conveyor chain 5, and once stopped, the printed circuit board P is pushed and transferred to the next stage conversion device 3. A bottle is provided above the piston 19 as a conveyance means. A detector 22 detects the stop position of the printed circuit board P transported by the transport chain 5;
3 is a roller chain for transmitting the rotation of each screw rod 34 of the next stage converting device 3.

In the conversion device 3, 31, 32, and 33 are gears that transmit the rotation of each screw rod 34. 35 is each screw rod 34
36 is the guide rail on the fixed side, 37 is the guide rail on the 8-side side, and each guide rail 3
6.37 both connect the printed circuit board P to the engaging grooves 36a and 3.
7a for conveyance. Reference numeral 38 denotes a turntable to which each of the screw rods 34 is attached, and is means for converting the printed circuit board P from a horizontal position to a vertical position. 39 is the rotating table 38
40 is a motor that rotates the rotating shaft 39 and rotates the rotating table 3 from a horizontal position to a vertical position as shown by the two-dot chain line in FIG. 5; 41 is a motor that is fixed to the rotating table; Reference numeral 38 denotes a moving table as a means for moving the printed circuit board P in a direction perpendicular to the conveyance direction, 42 a guide shaft for the moving table 41, and 43 driving the moving table 41 to the position shown by the two-dot chain line in FIG. An air cylinder, 44 is a rod, and a moving base 41
It is fixed as one piece. 45 is a rodless air cylinder installed on the upper part of the moving table 41, and in the horizontal direction,
Moreover, it is provided parallel to the conveyance direction of the printed circuit board P. 4
6 is a piston of the air cylinder 45, 47 is a guide shaft for the piston 460, and 4 is a transfer plate that pushes the printed circuit board P held in a vertical position relative to the horizontal position as shown by the two-dot chain line in FIG. This is means for transporting the cleaning device main body 3 to the next stage.

In the main body 4 of the cleaning apparatus, 51 is a hot liquid cleaning tank that sprays a hot liquid of Freon (trade name of DuPont) onto the printed circuit board P to clean it. 52 is a cold liquid cleaning tank that sprays Freon cold liquid onto the printed circuit board P to clean it. A drying tank 53 dries the printed circuit board P using Freon vapor. 54, 55, and 56 are baskets provided on one side to hold, for example, odd-numbered printed circuit boards P in an upright state transported from the conversion device 3; the basket 54 is used for hot liquid cleaning [51, The basket 55 is connected to the cold liquid tank 55, and the basket 56 is connected to the drying tank 53.
It is set in. Reference numeral 57 indicates a hanging fitting for hanging the above-mentioned hangings 54 to 56, and 58 indicates a hanging fitting for hanging the hanging fittings 54 to 5 by means of the hanging fitting 57.
A holding plate 59 for holding 6 is above the above-mentioned bumps 54 to 56,
An air cylinder 60 serving as a downward movement means is a rod fixed to the holding plate 58. Reference numerals 61, 62, and 63 denote feeding fittings as a means for transferring the printed circuit boards P in each of the baskets 54 to 56, 64 a shaft to which the multi-feeding fittings 61 to 63 are fixed, and 65 the shaft 64 at an angle of 90''''. A rotating motor, 66 a guide rail, 67 a slide plate 6 to which the shaft 64 and the motor 65 are integrally attached and move on the guide rail 66 in parallel with the conveyance direction of the printed circuit board P.
8 is an air cylinder that drives the slide plate 67; 69;
is a rod to which the slide plate 67 is fixed.

Reference numerals 70, 71, and 72 denote the other side baskets that are provided in parallel at positions facing the above-mentioned cages 54 to 56, and hold the even-numbered printed circuit boards P sent from the conversion device 3 in an upright state. The above-mentioned difficulties 54 to 56 are also placed on each basket 70 to 72 side.
A device is provided for moving the even-numbered printed circuit boards P up and down. 73 is the hot liquid cleaning tank 5
a spouting pipe provided in 1 and spouting a warm Freon liquid;
Reference numeral 74 is a pipe provided in the cold liquid cleaning tank 52 for spouting a cold Freon liquid, 75 is a Freon liquid, 76 is a heater that heats the Freon liquid 75 to make it into steam, and 77 is a pipe for spouting the Freon liquid 75 into steam. It is a cooling pipe for cooling. In FIG. 4, reference numeral 78 denotes guide rails provided at the above-mentioned bumps 54 to 56, which guide the movement of the printed circuit board P and hold it vertically. Of course, they are similarly provided on each of the cages 70 to 72. Reference numeral 79 denotes a guide rail provided on the cleaning device main body 4.

Next, the operation will be explained.

First, the handle 9 is turned to move the conveyance chain 5 and the guide rail 37 in accordance with the holding width of the printed circuit board P.

Next, the motor 15 is driven to cause the conveyance chain 5 to travel.

Next, the soldering is carried out by a device (not shown), and the soldered printed circuit boards P are sequentially sent to the transport device 2 and placed on the holding protrusions (not shown) of the transport chain 5. Transfer. When the leading end of the printed circuit board P in the transport direction is detected by the detector 22, the transport chain 5 stops running.

Next, the air cylinder 16 is operated to raise the air cylinder 18 using the rod 17, and the air cylinder 18 is stopped at a position where the pin 21 engages with the printed circuit board P.

Next, the piston 19 is moved to push the printed circuit board P with the bin 21 and convey it to the guide rail 36 of the conversion device 3.
．． 37. to engage.

Next, when the first printed circuit board P is transferred to and engaged with the guide rails 36 and 37, the motor 40 is driven and rotates the rotary table 38, as shown by the two-dot chain line in FIG. Position the printed circuit board P vertically. At this time, gears 33 and 32 are disengaged.

Next, when the air cylinder 45 is driven, the piston 46
moves to convey the first printed circuit board P (hereinafter the same applies to odd-numbered printed circuit boards), and the cleaning device main body 4
54 into the cage 54. After the first printed circuit board P is inserted into the basket 54, the air cylinder 43 and the motor 40 operate in the opposite manner to the above to return it to its original position.

Next, when the second printed circuit board P (hereinafter the same applies to even-numbered printed circuit boards) is sent and engaged with the guide rails 36 and 37, the rotary table 3 is vertically moved in the same manner as above. However, in the case of the second printed circuit board P, the air cylinder 43 is driven as shown by the two-dot chain line in FIG. direction, drive the air cylinder 45 to insert the second printed circuit board P into the basket 70,
After that, the rotary table 38 and the delivery plate 48 are moved by the operation opposite to the above.
and return them to their original positions.

Next, the basket 54 containing the first printed circuit board P is lowered by the drive of the air cylinder 59 and enters the hot liquid cleaning tank 51, where it is cleaned by Freon's warm liquid, and after cleaning is finished, it is raised. Return to original position.

Note that while the first printed circuit board P is being cleaned, the operation of inserting the second printed circuit board P into the basket 70 is performed.

Next, when the motor 65 is driven, the feed fittings 61 to 63 rotate from the position indicated by the two-dot chain line in FIG. 1(c) to the position indicated by the solid line where the first printed circuit board P is engaged. Then,
The air cylinder 68 is driven and the first printed circuit board P
, the printed circuit board P is stored in the basket 55. Next, the printed circuit board P is cleaned with cold Freon liquid in the same manner as above. After cleaning, the basket 55 rises and returns to its original position, and the third (odd numbered) printed circuit board P is placed in the basket 5.
4 is inserted. During this time, the basket 70 moves up and down, and the second printed circuit board P is cleaned with the warm Freon liquid.

Next, the first printed circuit board P is sent to the basket 56 of the drying tank 53 in the same manner as described above, and is dried by the vapor of the Freon liquid 75 heated by the heater 76, thereby completing the cleaning. Note that the vapor of the evaporated Freon liquid 75 is cooled by the cooling pipe 77 and returns to the Freon liquid 75.

In this way, during soldering, the odd-numbered printed circuit boards P sent sequentially from the processing device are stored alternately in the baskets 54 to 56, and the even-numbered printed circuit boards P are alternately stored in the baskets 70 to 72, and then cleaned. Drying takes place.

In order to smoothly transport and clean the printed circuit board P, six baskets 54 to 56 and 70 to 72 are provided in the illustrated apparatus. In order to continuously transport the printed circuit board P, it is necessary to provide at least two or more in parallel to the transport direction of the printed circuit board P.

〔Effect of the invention〕

As explained above, the present invention includes a conveying device equipped with a means for horizontally conveying printed circuit boards that have been soldered one after another; means for converting into a position;
A printer equipped with a means for transporting odd-numbered printed circuit boards in a vertical position to a subsequent stage, and a means for moving six even-numbered printed circuit boards in directions perpendicular to the conveying direction for converting the even-numbered printed circuit boards to vertical positions and then handing them over to the subsequent stage. A circuit board holding direction conversion device; a plurality of baskets provided in a parallel direction with respect to the transportation direction of the printed circuit boards in order to sequentially store the printed circuit boards conveyed from the printed circuit board holding direction conversion device in a vertical position, and these baskets. The main body of the cleaning device includes means for lowering and raising, a cleaning tank for cleaning each printed circuit board when the multicurrent is lowered, and a means for sequentially transferring the printed circuit boards in each part; It can be used in conjunction with a carrier-less soldering device that is not equipped with a carrier-less soldering device, and the printed circuit board can be automatically transferred to the next device. In addition, it eliminates the need to manually move printed circuit boards from a horizontal position to a vertical position, or to feed them alternately into baskets arranged in parallel.Furthermore, printed circuit boards can be thoroughly cleaned in a vertical position, and the cleaning solution runs out. cleans well, and no cleaning fluid remains on the printed circuit board. Also,
Even if printed circuit boards are transported intermittently in the cleaning equipment, the main body of the cleaning equipment is the IA of the printed circuit boards up to the front stage of the cleaning equipment.
Since the conveyance can be performed at the same speed as the continuous conveyance in the burying process, the conveyance speed is not reduced. Furthermore, since the main body of the cleaning device can be made smaller, it has advantages such as being economical and improving the quality of printed circuit boards.

[Brief explanation of the drawing]

Figures 1 (a) to (C), Figures 2 (a) and (b). Figures 3(a), (b), and 4 show an embodiment of the present invention; Figure 1(a) is a plan view, Figure 1(b) is a side view, and Figure 1(a) is a plan view. C) is a cross-sectional view taken along the line I-I in FIG. b) is a front view and a plan view showing the printed circuit board holding direction changing device, FIG. 4 is a perspective view showing the main parts of FIG. 1, and FIGS. 5 and 6 are views showing the operation of FIG. 3. It is. In the figure, 1 is a printed circuit board cleaning device, 2 is a transport device, 3 is a printed circuit board holding direction changing device, 4 is a cleaning device main body, and 5 is a printed circuit board cleaning device.
1 is a conveyor chain, 12 is a drive shaft, 15 is a motor, 16.
18 is an air cylinder, 21 is a pin, 31, 32, 33 is a gear, 36, 37 is a guide rail, 36a, 36b is an engagement groove, 38 is a rotating table, 39 is a rotating shaft, 40 is a motor, 4
1 is a moving table, 43.45 is an air cylinder, 48 is a transfer plate, 51 is a hot liquid cleaning tank, 52 is a cold liquid cleaning tank, 53 is a drying tank, 54, 55, 56, 70, 71, 72 are baskets, 58 is a holding plate, 59 is an air cylinder, 61, 62, 63 is a feed fitting, 64 is a shaft, 65 is a motor, 67 is a slide plate, 68
73 and 74 are air cylinders, 73 and 74 are jetting vibes, 75 is a Freon liquid, 77 is a cooling vibe, and P is a printed circuit board. Figure 1 (c) 77 Jyo Soku Bai 7

Claims (1)

[Claims] a conveyance device comprising means for horizontally conveying soldered printed circuit boards one after another; means for converting the holding direction of the printed circuit boards conveyed from the conveyance device from a horizontal position to a vertical position; means for transporting odd-numbered printed circuit boards in the vertical position to a subsequent stage; and means for moving the even-numbered printed circuit boards in the vertical position in a direction perpendicular to the conveyance direction for converting the even-numbered printed circuit boards in the vertical position to the vertical position and delivering them to the subsequent stage. a printed circuit board holding direction converting device; a plurality of baskets provided in a parallel direction with respect to the conveying direction of the printed circuit boards for sequentially storing the printed circuit boards conveyed from the printed circuit board holding direction changing device in a vertical position; a cleaning device main body comprising means for lowering and raising these cages, a cleaning tank for cleaning each of the printed circuit boards when each of the cages is lowered, and a means for sequentially transferring the printed circuit boards in each of the cages; A printed circuit board cleaning device comprising: