JPS62280109A - Conveyor for printed circuit board - Google Patents

Abstract

PURPOSE:To make a thin PCB accurately conveyable in a stable manner, by installing a lot of roller in a conveying direction being free of slide motion and vertically opposed with one another, and holding a board and between upper and lower rollers for conveyance. CONSTITUTION:A lot of rotatable shafts 1 and 2 are installed as vertically opposed respectively in parallel with each forward direction. Slidable rollers 12, 12, 13 and 13 are attached to both ends of these shafts 1 and 2. The shaft 1 is rotated by drive of a gear 9, and reverse rotation is transmitted to the shaft 2 by gears 10 and 11, thus these rollers 12 and 13 are reversely rotated with each other. Therefore, a printed circuit board P, whose both ends P1 are held between both the rollers 12 and 13, is conveyed. These rollers 12 and 13 are connected to needles 17 whose interval is adjusted by the counter screw 16 installed in an upper part of a frame 3, and they are adjusted in accordance with width of the board P. With this constitution, a circuit part P2 of the board P is conveyable without entailing any contact with these rollers.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a conveyor device used in the manufacturing process of printed wiring boards on which circuit patterns are formed. That is, various chemical treatments for manufacturing printed circuit boards 1
In the surface treatment process, a conveyor device is incorporated into the mechanical equipment, and the printed circuit board is conveyed by the conveyor device while being immersed, sprayed, etc. in a treatment liquid to perform surface treatment.

"Prior Art" Now, when a printed circuit board is conveyed by a conveyor device, it is desirable that the circuit part, which is the circuit pattern forming part, does not come into contact with the rolls of the conveyor device, etc., regardless of whether before or after the circuit pattern is formed. . In recent years, circuit patterns have become increasingly dense, complex, and miniaturized, and accordingly, strict chemical treatment (1) surface treatment is required, and the demand for such a non-contact state is also increasing.

In other words, if the circuit part of the printed circuit board comes into contact with the conveyor device, serious defects may occur depending on various processes, such as a decrease in the surface roughening rate, variations in the etching resist film, and the formation of pinholes, which may lead to the print failure. Problems were pointed out regarding the stability and reliability of the board.

Therefore, conventional conveyor devices are as shown in FIGS. 5 and 6.

That is, the rolls etc. of the conveyor device C are connected to both ends C1,
C1 is formed to have a higher curve than the central portion C2, so that the printed circuit board P has side edges P1. P1 came into contact with both end portions C1, C1 of the roll etc. of the conveyor device C, but the circuit portion P2 was conveyed to the central portion C2 in a non-contact state.

In the conventional example, the circuit section P of the printed circuit board P is
2 was kept out of contact with the conveyor device C.

"Problems to be Solved by the Invention" By the way, the following problems have been pointed out in this conventional conveyor system @C.

According to this conveyor device C, while the printed circuit board P is being conveyed, its side edge P1. P1 is the only conveyor device C, that is, its ends c1. Contact on C1.

Since the printed circuit board P is in a state where it is only placed, its transportation becomes uncertain, and problems have been pointed out from this aspect with respect to the stability and reliability of the printed circuit board P.

That is, especially when the printed circuit board P is immersed in the processing liquid and transported, or when the printed circuit board P is extremely thin with a wall thickness of 1.0 m or less, the buoyancy of the processing liquid,
The printed circuit board P may be lifted up due to the wave motion, or the circuit section P2 may come into contact with the roll of the conveyor device C due to the slack. In this way, the conveyance of the printed circuit board P becomes uncertain, causing problems in its stability and reliability. On the other hand, the thickness of the printed circuit board P is expected to become thinner and thinner in the future.

In the conventional example, the above-mentioned problems have been pointed out.

In view of these circumstances, the present invention was made as a result of the inventor's earnest research efforts in order to solve the problems of the conventional example described above. Since various processing is performed while being transported, the transport is reliable and stable.

The purpose is to propose a highly reliable printed circuit board conveyor device.

"Means for Solving the Problems" The technical means of the present invention to achieve this objective are as follows.

This conveyor device is used in various chemical treatment 2 surface treatment steps that are the manufacturing process of printed circuit boards, and has the following first shaft, second shaft, first roller,
It has a second roller 1 interval adjustment mechanism and a drive source.

The first shaft includes a number of rotatable shafts arranged in parallel.

The second shaft includes a number of rotatable shafts arranged above each of the first shafts and facing each other.

The first rollers are attached to both ends of each first shaft, and at least one of the first rollers is slidable in the axial direction.

The second roller is attached to both ends of each second shaft, and at least one of the second rollers is slidable in the axial direction,
And, the size and positional relationship is such that they are pressed into contact with the first roller.

The interval adjustment mechanism moves and positions the pair of first and second rollers in such a manner that the side edges of the printed circuit board are sandwiched therebetween.

At least one of the first shaft and the second shaft is rotationally driven by a drive source.

"Function" Since the printed circuit board conveyor device according to the present invention is comprised of such means, it functions as follows.

First, operate the interval adjustment mechanism to adjust each first roller.

The second roller is moved by sliding in the axial direction of the first shaft and the second shaft, respectively, and positioned at a position where the side edge of the printed circuit board to be transported and processed is sandwiched between them.

Next, the drive source is driven, and the first shaft and further the second shaft are rotationally driven.

Thereafter, the printed circuit board is conveyed in a predetermined conveyance direction by having its side edges sandwiched between rotating first rollers and second rollers.

Then, the necessary chemical treatment 1 surface treatment is performed on the circuit portion of the printed circuit board thus transported.

In this way, the printed circuit board has the first side edge. Since it is conveyed while being sandwiched between the second rollers, it is reliably conveyed without lifting or sagging, and the circuit section is conveyed between the first and second rollers of the conveyor device. second roller, first roller; Various treatments can be performed without contacting the second shaft, etc., thereby significantly improving the stability and reliability of the printed circuit board.

"Example" The present invention will be described in detail below based on the example shown in the drawings.

FIG. 1 is a front sectional view of the main part, FIG. 2 is a front sectional view of the whole, and FIG. 3 is a plan view thereof.

Reference numeral 1 denotes a number of rotatable first shafts arranged in parallel within the processing shaft R. This first shaft 1.1. ...
A plurality of rotatable second shafts 2, 2 . ...is arranged.

And these first shafts 1, 1 . ...and the second
Shaft 2, 2. . . . are bearing portions 4, 4, . ...is constructed in between.

Reference numeral 5 denotes a drive shaft, and this drive shaft 5 is connected to an electric motor 7, which is a drive source, via a chain 6, and is driven to rotate. Further, this drive shaft 5 has gears 8, 8 . ... are fixed, and these gears 8, 8. ... is the first
Shaft 1, 1. Gears 9, 9 . . . fixed to one end of the extending portion. It meshes with... Note that in the illustrated example, the first shafts 1, 1 . . . . the other end extension portion and the second shaft 2, 2. . . . gears 10,
10. ...and gear 11.11. ... are fixed, and the gears 10 and 11 are in mesh with each other.

And the first shaft 1,1. ... and the second shaft 2, 2. At both ends between the bearing parts 4, 4, there are first rollers 12, 12, . ... and second rollers 13, 13. ...But sleeve S, S.

In the illustrated example, both are slidably attached in the axial direction. The first roller 12 and the second roller 13 have a size and position such that their outer surfaces are in pressure contact with each other, and a circumferential groove 121 and a circumferential groove 131 are formed at opposing positions, respectively, and a corresponding groove is formed on the inner side of the pressure contact part. A stepped portion 22 and a stepped portion 132 are formed, and in the illustrated example, the inside is made of a soft material and the outside is made of a hard material.

14 is an interval adjustment mechanism, and the first roller 12 forming a pair
．． The second rollers 13 are connected to the side edges P1. of the printed circuit board P, respectively. Move 2 is positioned at a position where p1 is sandwiched therebetween, and the first roller 12. The second roller 13 is made to freely correspond to the size of the feed width of the printed circuit board P to be processed.

This interval adjustment mechanism 14 is located at the upper end of the frames 3, 3.
For example, the first shaft 1. Second
Bearing portions 15.1 formed every eight shafts 2
5 and the bearing part 15. A third shaft 16 with a screw threaded in the opposite direction from the center between the two third shafts 16 and a movable member 17°1 with screws threaded onto both ends of each third shaft 16.
7, and the movers 17, 17 . . . are attached to the mover 17 via attachment members 18 and are located on one side and the other side along the conveyance direction. . . . Connecting rods 19, 19 that connect the two in one body, and connecting rods 19 to the circumferential grooves 121, 131 formed in each of the first roller 12 and second roller 13 from the front or rear. A large number of engagement plates 1 to 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20. It is equipped with...

A worm wheel 21 is fixed to one end of each third shaft 16, and the worm wheel 21 is threadedly engaged with a worm 23 fixed to a drive shaft 22. A handle 24 is provided at the end of the drive shaft 22. It is being

Note that the spacing adjustment mechanism 14 can be configured using various known techniques other than the one shown in the figure. For example, the feed width of the printed circuit board P to be processed is detected by a sensor, and a rotary dipping is performed in accordance with this detected value. The configuration may be such that a motor is rotationally driven and the drive shaft 22 is connected to this motor. Furthermore, for example, a method may be considered in which a sensor is used to move and stop the movable element 17, and the drive motor is turned on and off based on a detection signal from the sensor.

Note that W in the figure is required at the level of the processing liquid, which is the chemical liquid.

The above is the explanation of the configuration.

Next, the operation of this conveyor device will be explained.

First, by operating the handle 24 of the spacing adjustment mechanism 14, the drive shaft 22. The third shaft 16 rotates via the worm 23° worm wheel 21, so that the left and right movers 17.17 move oppositely toward both sides or toward the center, and each engagement plate 20.2 is moved via the connecting rod 19.
0. ... similarly moves in the opposite direction.

Therefore, each of the first rollers 12 and second rollers 13 are similarly moved left and right oppositely along the axial directions of the first shaft 1 and the second shaft 2, respectively, through the respective circumferential grooves 121 and 131, and the step portions thereof are Between 122 and 132, the side edge P1 of the printed circuit board P to be transported and processed is positioned so as to be sandwiched therebetween.

The electric motor 7 is then driven and the drive shaft 5. gear 8,9
The first shaft 1 is rotated through the gears 10 and the second shaft 2 is rotated through the gears 10 and 11, so that each of the first rollers 12 and the second rollers 13 are rotated in opposite directions.

Thereafter, the printed circuit board P is conveyed in a predetermined direction by having its side edge portion P1°Pl sandwiched between the stepped portions 12□ and 132 of the rotating first roller 12 and second roller 13.

And the circuit part P of the printed circuit board P transported in this way
In contrast to 2, chemical treatment 1 surface treatment is performed by immersion in a treatment liquid, application of a treatment liquid, etc.

In this way, the printed circuit board P has the side edge P1゜Pl as the first
Roller 12. Since it is conveyed while being sandwiched between the second rollers 13, the circuit portion P2 is reliably conveyed without floating or sagging in the processing liquid, and the circuit portion P2 is held between the first rollers 12.12°... , second roller 13.13.
..., first shaft 1.1. ..., second shaft 2
,2. . . . etc., various treatments are carried out strictly, and the stability and reliability of the printed circuit board P are significantly improved.

As shown in FIG. 4, the printed circuit board P consists of a circuit section P2 that is necessary during the manufacturing process, and side edge sections P, P1 that are removed as unnecessary after the manufacturing process. During the manufacturing process, this side edge surface is used as a guide hole for positioning during punching, printing, and pressing, or as a gripping margin, and in the present invention, the first roller 1
2 and the second roller 13 for pressure contact and pinching, but it is later removed.

The above is the explanation of the operation, etc.

There are various possible chemical treatment steps for the printed circuit board P into which the conveyor device according to the present invention is incorporated, and a few examples will be explained here.

First of all, there is a so-called blackening process.

That is, the multilayer printed circuit board P is formed by stacking a plurality of inner layer plates and bonding them together using a high-pressure press while heating. A blackening treatment is performed as a preliminary treatment step in which the materials are roughened by being conveyed by a conveyor device while being immersed, thereby increasing the bonding area of the outer surfaces to each other and improving the bonding strength. Fine irregularities of 1 micron or less are formed on the outer surface of the inner layer plate roughened by such blackening treatment, but according to the present conveyor device, the circuit portion P2 roughened in this way is The surface treatment can be performed reliably without contacting each part and without crushing the irregularities.

Second, the following manufacturing process of the printed circuit board P can be mentioned.

That is, when the circuit portion P2 is immersed in alkylimidazole, a film is formed, which is used as an etching resist. This is done by immersing the printed circuit board P in alkylimidazole and transporting it by a conveyor device, whereby the alkylimidazole reacts with the copper foil portion that is the circuit section P2, and a monomolecular film thereof is formed. . The formed film of several microns is then washed with water, dried, and heat cured to be used as an etching resist.

Even in this film forming process, the circuit portion P2 does not come into contact with any part of the present conveyor device, thereby preventing variations in the film and the occurrence of pinholes.

Thirdly, the following manufacturing process of the printed circuit board P is mentioned.

That is, in order to form the etching resist, a liquid etching resist is simultaneously coated on the front and back sides of the printed circuit board P using a printing machine or a roll, transferred, dried and hardened, and used as an etching resist. However, before drying and hardening, Circuit part P2
Since the etching resist does not come into contact with any part of the conveyor device, damage to the etching resist is reliably prevented.

The printed circuit board P conveyor device according to the present invention is used in this way, for example.

In addition, in the embodiment described above, the first roller 12
I3 and the second roller 13 are movable on both sides along the conveyance direction, but the present invention is not limited to this, and the one on either side is movable in the first direction.
Shaft 1. It may be fixed to the second shaft 2, and only the other side may be movable (flexible or movable) and positioned relative to the printed circuit board P.

"Effects of the Invention" As explained above, the printed circuit board conveyor device according to the present invention performs various processing while conveying the printed circuit board by sandwiching the side edges between the rollers, so that the printed circuit board can be easily transported. This allows us to obtain products that are reliable, stable, and reliable. In other words, the printed circuit board does not lift or sag during the conveyance process, and the circuit section does not come into contact with any part of the conveyor device.
Depending on the various processing steps, the surface roughening rate is improved, and the occurrence of variations, scratches, pinholes, etc. in the etching resist film is reliably prevented.Strict chemical treatment 2 surface treatment is performed, and the occurrence of defects is significantly reduced. The effects it brings are remarkable and significant, such as reducing the number of conveyors and eliminating the problems that existed in conventional conveyor devices of this type all at once.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of a main part of a printed circuit board conveyor apparatus according to the present invention, FIG. 2 is a front sectional view of the entire same, and FIG. 3 is a plan view of the same. FIG. 4 is a schematic plan view of the printed circuit board. 5 and 6 show essential parts of a conventional printed circuit board conveyor device, with FIG. 5 being a perspective view and FIG. 6 being a front sectional view.

Claims (1)

[Claims] A conveyor device used in a printed circuit board manufacturing process, comprising: a plurality of rotatable first shafts arranged in parallel; and arranged oppositely above the first shafts. a large number of rotatable second shafts; a first roller attached to both ends of each of the first shafts, at least one of which is slidable in the axial direction; and a first roller attached to both ends of each of the second shafts. at least one of which is slidable in the axial direction, and the first
It has a second roller that is pressed into contact with the roller, and an interval adjustment mechanism that moves and positions the paired second roller and second roller, respectively, to a position where the side edge of the printed circuit board is sandwiched between them. A printed circuit board conveyor device, wherein at least one of the first shaft and the second shaft is rotationally driven by a drive source.