JPS63146490A - 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] (Industrial Application Field) This 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 equipment, after electronic components are mounted on a printed circuit board, the printed circuit board is engaged with a holding piece of a conveyor chain and transported horizontally, and then undergoes flux treatment, preheating, soldering processing, and cleaning. All processing was performed at the same speed.

(Problem to be solved by the invention) 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 conveyed at the same speed, the printed circuit boards will be When cleaning with a cleaning device, the cleaning time is shortened.For this reason, 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 for attaching 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-mentioned problems, and is a printed circuit board that can be sufficiently cleaned and drained of the cleaning liquid by holding the printed circuit board in a vertical position relative to the horizontal position and spraying cleaning liquid onto the printed circuit board. The purpose is to obtain a substrate cleaning device.

[Means for solving problems]

The printed circuit board cleaning device according to the present invention converts the holding direction of a printed circuit board that has been transported horizontally and soldered thereinto from a horizontal position to a vertical position, and stores the printed circuit board that is held vertically in a vertical position. a means for lowering and raising these baskets alternately; a cleaning tank for cleaning the printed circuit boards when the multi-purpose cages are lowered; means for sequentially transferring the respective printed circuit boards housed in each cage when the cage is in the raised position.

(Function) In this invention, the printed circuit board that has been converted from a horizontal position to a vertical position is stored in the main body of the cleaning device, and the main body of the cleaning device sufficiently cleans both sides of the printed circuit board by spraying the cleaning liquid in the vertical position. .

〔Example〕

Fig. 1 (a) to (c), Fig. 2 (a), (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 sectional view taken along the line II in Fig. 1(a), Figs. 2(a) and 2(b) are a front view and a plan view showing the printed circuit board conveyance device, and Figs. 3(a) and ( 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 conveyance device for the printer 0 and the substrate P; 3 is a printed circuit board holding direction conversion device (
(hereinafter simply referred to as a conversion device), 4 is a cleaning device main body for cleaning the printed circuit board P. 5 in the transport device 2
A conveyance chain serves as a means for horizontally conveying the printed circuit board P, and is provided with a protrusion (not shown) projecting horizontally from the conveyance chain 5 in order to place the printed circuit board P thereon. 6 is a fixed plate fixed to the conveying device 2;
7 is a moving plate, 8 is a screw rod on the driving side into which the moving plate 7 is screwed together, 9 is a handle fixed to the screw rod 8, 10 is a screw rod on the driven side, and 11 connects each of the screw rods. 1 is a roller chain; 12 is a drive shaft for running the transport chain 5; 13 is a long key that engages with the moving plate 7; 14 is a guide shaft; 15 is a motor for driving the drive shaft 12;
6 is an air cylinder provided in the upper and lower directions, 17 is a rod,
A rodless air cylinder 18 is attached to the rod 17, and is provided horizontally and parallel to the conveyance direction of the printed circuit board P. 19 is the air cylinder;
18 pistons, 20 a guide shaft for guiding the pistons, 21 placed on the conveyance chain 5,
This pin is provided above the piston 19 and serves as a means for pushing the printed circuit board P once it has stopped and transporting it to the next stage conversion device 3. 22 is a detector for detecting the stop position of the printed circuit board P transported by the transport chain 5, and 23 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, the rotation of each screw rod 34 is transmitted by the Hfi wheel 31.32.3. 35 is each screw rod 3
4, 36 is a guide rail on the fixed side, 37 is a guide rail on the movable side, and each guide rail 36, 37 connects the printed circuit board P with an engaging groove 36a,
37a 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 3
40 is a motor that rotates the rotating shaft 39 to rotate the rotating table 38 from a horizontal position to a vertical position as shown by the two-dot chain line in FIG. 5; 41 is a motor that rotates the rotating table 38; 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. Air cylinder, 44 is a rod, moving base 4
1 is fixed as one piece. Reference numeral 45 denotes a rodless air cylinder provided above the moving table 41, and is provided horizontally and parallel to the conveyance direction of the printed circuit board P.

46 is a piston of the air cylinder 45, 47 is a guide shaft of the piston 46, and 48 is a transfer plate, which pushes the printed circuit board P held in a vertical position with respect 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 cleaning apparatus main body 4, 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. Reference numeral 52 denotes a cold liquid cleaning tank, which sprays a cold Freon liquid onto the printed base Np 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 conveyed from the conversion device 3; the basket 54 is placed in the hot liquid cleaning tank 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. 57 is a hanging fitting for hanging the polysulfuric acid 54 to 56, and 58 is a hanging fitting for hanging the polysulfuric acid 54 to 5 by the hanging fitting 57.
a holding plate 59 holding the polysulfuric acid 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 refer to a feeding fitting as a means for transferring the printed circuit board P in each of the cages 54 to 56, 64 refers to a shaft to which the above-mentioned art fittings 61 to 63 are fixed, and 65 refers to a rotation of the shaft 64 by an angle of 90'. 66 is a guide rail, 67 is a slide plate 68 which integrally mounts the shaft 64 and the motor 65 and moves on the guide rail 66 in parallel with the conveyance direction of the printed circuit board P.
is an air cylinder that drives the slide plate 67, and 69 is a rod to which the slide plate 67 is fixed.

Reference numerals 70, 71, and 72 designate the other baskets provided in parallel at positions facing the polysulfuric acid 54 to 56, and hold the even-numbered printed circuit boards P sent from the conversion device 3 in an upright state. The polysulfuric acid 54 to 56 is also added to each cage 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;
74 is a vibrator that is installed in the cold liquid cleaning tank 52 and spouts out a cold Freon liquid; 75 is a Freon liquid; 76 is a heater that heats the Freon liquid 75 to steam; 77 is a vibrator that spouts a Freon liquid; It is a cooling vibe that cools you down. In FIG. 4, reference numeral 7B denotes guide rails provided on the polysulfur 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 conveyor 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 using a device (not shown), and the soldered printed circuit boards P are sequentially sent to the conveying device 2 and placed on the engaging protrusions (not shown) of the conveying 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 relint substrate P.

Next, the piston 19 is moved to push the printed circuit board P with the pin 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 mounted and engaged with the guide rails 36 and 37, the motor 4o is driven to rotate the rotary table 38, as indicated 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 transport the first printed circuit board P (hereinafter the same applies to odd-numbered printed circuit boards) and insert it into the basket 54 of the cleaning apparatus main body 4. The first printed circuit board P is basket 5
4, the air cylinder 43 and 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 cage 7'O, and then move the rotary table 38 and the delivery plate 4 by the reverse operation to the above.
8 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 i75.

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 converts the holding direction of a printed circuit board that has been transported horizontally and has been soldered to a vertical position with respect to the horizontal position, and stores the printed circuit board held vertically in the vertical position. A plurality of cages are arranged in parallel to the conveyance direction of the printed circuit boards, means for lowering and raising these cages alternately, a cleaning tank for cleaning the printed circuit boards when the multipurpose is lowered, and a means for cleaning the printed circuit boards when the multipurpose is lowered. Since it consists of a means for sequentially transporting each printed circuit board stored in each cage six times when it is in the horizontal position, the printed circuit board can be thoroughly cleaned in the vertical position, and the cleaning liquid drains easily, unlike conventional cleaning in the horizontal position. There is no cleaning solution remaining on the top side of the printed circuit board compared to conventional cleaning products. Furthermore, even if the printed circuit board is transported intermittently, it can be transported as a whole at the same speed as continuous transport with the previous horizontal transport section. In addition, it is economical because the main body of the cleaning device can be made smaller, and has the advantage of improving the quality of printed circuit boards.

[Brief explanation of the drawing]

Figures 1 (a) to (C), Figures 2 (a) and (b). 3(a), (b), and 4 show embodiments of the present invention, in which FIG. 1(a) is a plan view, FIG. 1(b) is a side view, and FIG. 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 hot liquid cleaning tank, 52 is a cold liquid cleaning tank, 53 is a drying tank, 5
4.55.56.70゜71.72 is a basket, 57 is a hanging fitting, 5th is a holding plate, 59 is an air cylinder, 61.62.6
3 is a feed fitting, 64 is a shaft, 65 is a motor, 67 is a slide plate, 6th is an air cylinder, 73.74 is an ejection vibrator,
75 is Freon liquid, 76 is a heater, 77 is a cooling vibe,
78.79 is a guide rail, P is a yellowtail Figure 1 (c)

Claims (1)

[Claims] Converting the holding direction of the printed circuit board that has been soldered and transported horizontally to a vertical position with respect to the horizontal position, and storing the vertically held printed circuit board in the vertical position, and also with respect to the transport direction of the printed circuit board. a plurality of cages arranged in a parallel direction, means for lowering and raising these cages alternately, a cleaning tank for cleaning the printed circuit board when each of the cages is lowered, and when each of the cages is in a raised position. A printed circuit board cleaning apparatus comprising means for sequentially transporting each printed circuit board housed in each of the cages.