JPH0442290B2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to surface treatment of printed circuit boards, for example,
Degreasing by alkaline or electrolytic → Water washing → Pickling →
A series of surface treatments such as alcohol washing → draining with Freon → photoresist film coating → drying → exposure → development → etching or plating, or a series of surface treatment such as degreasing with trichlene → photoresist film coating → drying → exposure → development → etching or plating. The present invention relates to a printed circuit board hanger for performing surface treatment in batches (simultaneous processing of multiple boards), excluding exposure.

<Prior Art> In the surface treatment of printed circuit boards, except for exposure, the printed circuit boards are attached to printed circuit board hangers, which are then lifted by a stacker crane and transferred one after another into a series of processing tanks.

One of the conventional printed circuit board hangers is a rectangular frame that is one size larger than the printed circuit board, and clothespins that are attached to the four corners of this frame through rubber and hold the four corners of a single printed circuit board in a tensioned state. However, this method requires a lot of effort to attach and remove the printed circuit board, and since it is not a batch type, it has the drawback that each processing tank cannot be used efficiently.

On the other hand, the conventional batch-type printed circuit board hanger is a hanging cage that has vertical grooves that lock both ends of the printed circuit board when the printed circuit board is housed. It is also necessary to remove the printed circuit board, and
It is necessary to attach it to the clamping claws of a substrate lifting device attached to the photoresist film coating tank, which takes a lot of effort, and the photoresist film coating tank also requires a substrate lifting device, making it expensive.

Further, each of the above hangers requires various hangers corresponding to printed circuit boards of different sizes, so the number of hangers is large and storage is difficult.

<Object of the invention> The present invention was devised in view of the above points, and
It is possible to hang multiple printed circuit boards securely in a single tube so that they do not come into close contact with each other, and is versatile for the size of printed circuit boards.Furthermore, by using a stacker crane or industrial robot, To provide a hanger for a printed circuit board that can perform photoresist coating without the need to remove the printed circuit board.

<Structure of the Invention> The printed circuit board hanger of the present invention comprises a pair of hanging rods having a hook at the lower end extending horizontally or diagonally upward toward the tip of the hook and extending outward from the end surface of the circuit board. A plurality of pairs of hanging rods for hanging a plurality of printed circuit boards by fitting two holes drilled in the upper portions of both ends of the printed circuit board, and at least one side of the plurality of pairs of hanging rods is made movable. a hanger body that supports a plurality of pairs of hanging rods that can freely adjust the interval between the hanging rods on both sides;
It is provided from the hanger body so as to be located inside the upper part of the hanging rod on one side, and when rotated, it comes into contact with the hanging rod on one side with an eccentric action, and the lower end of the hanging rod is moved against the hanging rod on the other side. A camshaft to be separated, a handle for rotating this camshaft, and a wavy portion whose pitch almost matches the distance between the printed circuit boards is horizontally formed on both side end surfaces of the plurality of printed circuit boards suspended by the plurality of pairs of hanging rods. A pair of horizontal wave-like members that sandwich the printed circuit board by pressing against it to fix the interval between the printed circuit boards, and a pivot point that can be moved to the side of the hanger body so that one end pinches the left and right ends of the hanger body. two pairs of swingers, the other end of which is pivoted in such a way that the swinging tip extends substantially horizontally outward from the pivot point and is swingable in a vertical plane along the side surface of the hanger body; a member, two pairs of slide rods that engage the swinging tips of each swinging member so as to be guided in a substantially tangential direction and support one of the corresponding sides of the horizontally corrugated member at the lower end; and a photoresist film. It is characterized by comprising a slide rod lifting member fixed to the upper end of each slide rod so as to ride on a stopper member provided above the coating tank when the tank is positioned above the coating tank and lowered.

<Example> Hereinafter, an example of the printed circuit board hanger of the present invention will be described with reference to FIG. 1, FIG. 2, FIG. 3, FIG. 4, and FIG. 5 a and b. FIG. 1 is a front view showing a printed circuit board hanger suspended and housed in a photoresist coating processing tank, and FIG. 2 is a front view showing a state in which acid treatment or degreasing is being performed. , Figure 3 shows - in Figure 2.
FIG. 4 is a cross-sectional view of - in FIG.
It is a sectional view, and FIGS. 5a and 5b are an enlarged front view and a side view of the main part.

First, to explain the structure, as shown in FIGS. 1, 2, and 3, this printed circuit board hanger has a plurality of pairs of hanging rods 2a, 2b hanging from a hanger main body 1 with adjustable intervals. A plurality of printed circuit boards P are suspended from the hooks 3a, 3b at the lower ends of the plurality of pairs of hanging rods 2a, 2b, a camshaft 5 is rotated by the handle 4, and the camshaft 5 presses one side of the hanging rod 2a from the inside. Then, the printed circuit board P is tensed so as to be pulled away from the hanging rod 2b on the other side.
Attach the slide rod 7 to the swinging members 6a and 6b.
a, 7b are guided up and down, and a horizontal wave-like member 8a,
8b is supported at both ends, horizontally corrugated members 8a on both sides,
At 8b, the plurality of printed circuit boards P suspended between the hooks 3a and 3b at the lower ends of the plurality of pairs of hanging rods 2a and 2b are sandwiched to fix the interval between the printed circuit boards, and then the slide rod 7a ,7b
Slide rod lifting members 9a and 9b are fixed to the upper end, and these are stopper members 10a and 10b extending upward from the coating tank T1.
When coating the photoresist film, the slide rods 7a and 7b guided by the swinging members 6a and 6b are moved upward to move the horizontally corrugated member 8.
a, 8b can be pulled upwards.

As shown in FIGS. 2 and 3, the hanger body 1 is
Two bars 1 are formed in the shape of a rectangular parallelepiped box with an open upper part, and have a collar 11 between side parts 1a and 1b.
2 and 12 so that it can be lifted by a stacker crane or a lifting tool R of an industrial robot, and rollers 13 are provided on the outside of the side parts 1a and 1b.
It can be carried on a hanger rail or a hanger conveyor (not shown), and furthermore, it has chevron-shaped brackets 14, 14 on the side parts 1c, 1d, so that it can be placed on a hanger rail or a hanger conveyor (not shown). It is designed to be placed on the hanging members K, K of.

Hanging rods 2a, 2b, horizontal wave-like members 8a, 8b
The slide rods 7a and 7b are made of a material that is resistant to acids and alkalis, for example, stainless steel rods of about 2 to 4 mm. The upper ends of the plurality of hanging rods 2b on the right side are suspended and fixed from a movable plate 15b that is bolted to the bottom of the hanger body 1 in an adjustable manner, and the upper ends of the plurality of hanging rods 2a on the left side are fixed to the hanger body 1. Fixed plate 15a to be bolted
More drooping is fixed. Therefore, the left and right hanging rods 2a, 2b are movable to the position indicated by the chain line in accordance with the small printed circuit board P.

The hanging rods 2a, 2b have hooks 3a, 3 at their lower ends.
It has b integrally. As shown in FIGS. 5a and 5b, the hooks 3a and 3b are formed to become thinner toward the tips. Both of the left and right pairs of hooks 3a and 3b for hanging one printed circuit board P are connected to the two holes P1 and P2 drilled at the top of both ends of the printed circuit board P.
Hook 3 so that it can be fitted from the same side of
The ends of a and 3b are oriented almost horizontally, and hooks 3 are attached to prevent the printed circuit board P from slipping.
The tips of a and 3b are slightly opened outward and slightly upward.

The camshaft 5 is formed as an eccentric shaft, and is located inside the hanging rods 2a and 2b arranged on the left side.
Both ends are pivotally supported by a pair of brackets 16, 16 fixed to the fixed plate 15a. When the handle 4 fixed to one end of the camshaft 5 is in the chain line position, the handle 4 loosely touches the inside of the upper part of all the hanging rods 2a, 2a, 2a, ... lined up on the left side so that it does not fall down. When the handle 4 is lowered to the solid line position and the camshaft 5 is rotated, the camshaft 5 eccentrically presses all the hanging rods 2a and 2b lined up on one side, Connect the lower ends of the hanging rods 2a, 2b to the hanging rods 2a, 2b on the other side.
They are spaced apart from each other.

As shown in FIG. 4, horizontally corrugated members 8a and 8b
The wavy pitch approximately corresponds to the interval between the printed circuit boards suspended from the hanging rods 2a and 2b. In other words, the distance is approximately the same as the distance between the hanging rods 2a and 2b on one side. Stoppers 17a, 17b are fixed to the slide rods 7a, 7b, and these stoppers 17a, 17b abut against the upper surfaces of the swinging members 6a, 6b to position the slide rod lifting members 9a, 9b above the hanger body 1. . The swinging members 6a, 6b are connected to connecting shafts 18a, 1 supported by plates 15a, 15b.
There are two on each side, fixed to both ends of the hanger main body 1 of 8b, which extend outward, and are swingable in a vertical plane. By loosening the bolts and adjusting the movement of the right movable plate 15b, the right swinging member 6a can be moved together, and the distance between the right hanging rod 2b and the left hanging rod 2a can be adjusted according to the size of the printed circuit board P. You can adjust it according to your needs. and two slide rods 7 on each side.
a, 7b are the two swinging members 6a, 6a, 7b on the corresponding side;
The upper end is connected and fixed by the slide rod lifting members 9a, 9b, and the lower end fixedly supports both ends of the horizontal wavy members 8a, 8b. There is.

Next, the effect will be explained.

First, by placing the brackets 14, 14 on the pair of hanging members K, K of the stocking device, the printed circuit board hanger is horizontally suspended in the stocking position, and the left and right horizontal wave-like members 8a, 8b are pulled up, and the handle 4 is Position it horizontally as shown by the chain line. Then, the left hanging rod 2a is released from the pressure of the camshaft 5, and the distance between the pair of left and right hooks 3a, 3b is approximately equal to the distance between the holes P1, P2 drilled at both ends of the upper part of the printed circuit board P. Become. In addition, horizontal wave members 8a, 8
When b is pulled up, the left and right slide rod lifting members 9
Slide rods 7a and 7b so that a and 9b are close together.
Since the slide rods 7a, 7b fall down, the friction of engagement between the slide rods 7a, 7b and the swinging members 6a, 6b increases, and even if you release your hands from the horizontal wave-shaped members 8a, 8b, the slide rods 7a, 7b
7b will not fall.

Next, the worker stands on the side where the hooks 3a, 3b of the hanging rods 2a, 2b are facing forward, and inserts the holes P1,
Hang the printed circuit boards P one by one from the front to the front so that the hooks 3a and 3b are inserted into P2. In this case, since the ends of the pair of hooks 3a and 3b are directed slightly outward and upward, there is no risk of the printed circuit board P slipping off. When processing a small printed circuit board P, the right hanging rods 2a and 2b are moved to the chain line position and fixed accordingly. Once all the printed circuit boards P are hung, lower the handle 4, eccentrically rotate the camshaft 5, press the camshaft 5 strongly against the left hanging rod 2a, and connect the lower ends of the left hanging rods 2a and 2b to the right side hanging rod 2a. Hanging rods 2a, 2b
energize it so that it is spaced apart from the When this bias is applied, the upper parts of all the suspended printed circuit boards P are tensed, and the hooks 3a and 3b ensure the hanging of the printed circuit boards P, so that there is no slipping. Then, the horizontal wave-like members 8a and 8b are lowered. Then, the horizontal wave-like members 8a and 8b are
Since the slide rods 7a and 7b are fixed to the lower ends guided by the swinging ends of the swinging members 6a and 6b, they come into contact with the side end surfaces of the printed circuit boards P due to the action of gravity, and the plurality of printed circuit boards P is sandwiched between a pair of horizontally corrugated members 8a and 8b, and the distance between the substrates is kept substantially parallel.

Since the printed circuit boards P are hung parallel and smooth, when drying air is passed between the printed circuit boards P, the drying air causes the printed circuit boards P to shake a lot, causing adjacent ones to stick to each other. Furthermore, even if the printed circuit board hanger is moved between processing devices at high speed, the printed circuit boards P will not be tilted in parallel and adjacent printed circuit boards P will not adhere to each other.

After hanging the printed circuit board P, engage the hanging tool of a stacker crane or industrial robot so that it is sandwiched between the collars of the two bars of the hanger body 1, and lift it up as shown in Figures 2 and 3. Then, it is stored in the treatment tank T and subjected to the necessary treatment, and in this way,
They are then transferred between processing tanks and subjected to a plurality of treatments. In this case, when acid treatment or degreasing treatment is performed, the printed circuit board P is housed in the treatment tank so that the liquid level is at the relative position of L1,
The printed circuit board P is completely immersed.

As shown in FIG. 1, it is not necessary to remove the printed circuit board P during the photoresist film coating process. That is, when positioned above the photoresist film coating tank T1 and lowered, the slide rod lifting member 9
a, 9b ride on stopper members 10a, 10b extending above the tank, and the swinging members 6a,
After the slide rod 6b swings upward, the slide rod 7a,
7b is pulled up, horizontally corrugated members 8a, 8
b is smoothly pulled up away from the side end surface of the printed circuit board P. Then, the printed circuit board P is lowered and accommodated in the photoresist film coating tank T1 until the liquid level reaches the relative position L2.
Next, when the hanger main body 1 is raised at a slow speed, the printed circuit board P can be uniformly coated with the photoresist film, and when the hanger main body 1 is raised above the tank, the slide rod lifting members 9a, 9b
is separated from the stopper members 10a, 10b, and the pair of horizontally corrugated members 8a, 8b again keeps the plurality of printed circuit boards P substantially parallel.

After the photoresist film is coated and dried, the printed circuit board P is removed and exposed, and for development and etching, the printed circuit board P is hung again on the printed circuit board hanger.

<Modification> In the above embodiment, the right hanging rod 2b can be moved and adjusted according to the size of the printed circuit board P, but the left and right hanging rods 2a, 2b
Both may be movable. In this case, the left swinging member 6a can also be adjusted in movement in the same way as the right swinging member 6b, and the left movable plate 15a is moved and adjusted by loosening the bolts, and the left movable plate 15a is suspended by the camshaft 5. The rod 2a can be pressed from the inside.

The horizontal wavy members 8a and 8b have wavy portions whose pitches approximately correspond to the interval between printed circuit boards, and are arranged approximately horizontally on the side end surfaces of the plurality of printed circuit boards P suspended by the hanging rods 2a and 2b. It's good if you can get used to being pushed.

It is sufficient that the hooks 3a, 3b extend horizontally or diagonally upward toward the tip and extend outward from the end surface of the substrate.

A pair of hanging rods 2a, 2b and a swinging member 6, respectively.
a, 6b are not limited to the case where one side is movably fixed to the hanger body 1 and the interval can be adjusted, but both sides may be movably fixed to the hanger body 1.

<Effects of the Present Invention> As explained above, the printed circuit board hanger of the present invention has a plurality of pairs of hanging rods hanging from the hanger main body at adjustable intervals, and a print is attached to the outward hook at the lower end of the hanging rod. Multiple printed circuit boards are hung in parallel by hooking them through the holes drilled at both ends of the top of the board, and the cam shaft is used to widen the spacing between the hanging rods to ensure the above hooking. Since the structure is designed to hold the printed circuit board, it has the versatility of being able to hang the printed circuit board by adjusting the distance between the pair of hanging rods even if the size of the printed circuit board is different. The ends of the hooks are oriented horizontally, and the tips of the hooks are slightly open, so even if the printed circuit board shakes a little, it can be hung easily and securely without falling.

Further, according to the printed circuit board hanger of the present invention, the hook at the lower end of the hanging rod is used to hang the printed circuit board by hooking it into the holes made at both ends of the upper part of the printed circuit board which is not coated with a photoresist film, and the side end surface of the printed circuit board is hung. The horizontal corrugated member that is held down can be pulled up when the hanger is lowered, so there is no need to remove the printed circuit board during the photoresist coating process, which eliminates the trouble of removing the printed circuit board during conventional photoresist coating. This eliminates the need to attach a board locking lifting device to the photoresist film coating tank, making it an excellent hanger for printed circuit boards.

[Brief explanation of the drawing]

FIGS. 1, 2, 3, and 4 relate to embodiments of the printed circuit board hanger of the present invention.
The figure is a front view showing a state in which a printed circuit board hanger is hung and housed in a photoresist film coating processing tank. FIG. 2 is a front view showing a state in which acid treatment or degreasing is being performed. Figure 3 shows the second
FIG. 4 is a cross-sectional view of the second
Fig. 5a, b is a sectional view in the figure.
These are an enlarged front view and a side view of the main parts. P... Printed circuit board, P1, P2... Holes at the top of both ends of the printed circuit board, 1... Hanger body, 2
a, 2b... Hanging rod, 3a, 3b... Hook,
4... Handle, 5... Camshaft, 6... Swinging member, 7a, 7b... Slide rod, 8a, 8b...
Horizontal corrugated member, 9a, 9b...Slide rod lifting member, T1...Photosensitive film coating tank.

Claims (1)

[Claims] 1. A pair of hanging rods each having a hook at the lower end extending horizontally or diagonally toward the end of the hook and extending outward from the end surface of the printed circuit board. A plurality of pairs of hanging rods that fit together and suspend a plurality of printed circuit boards, and at least one side of the plurality of pairs of hanging rods is movable so that the interval between the hanging rods on both sides can be freely adjusted. A hanger body that supports a plurality of pairs of hanging rods is provided from the hanger body so as to be located inside the upper part of the hanging rod on one side, and when the hanger body is rotated, it comes into contact with the hanging rod on one side with an eccentric action and the hanging rod is attached to the hanger body. A camshaft that separates the lower end of the hanging rod from the hanging rod on the other side, a handle that rotates this camshaft, and side end surfaces on both sides of a plurality of printed circuit boards suspended by the plurality of pairs of hanging rods. A pair of horizontal wavy members that clamp the printed circuit board so as to fix the distance between the printed circuit boards by horizontally pressing the wavy portions whose pitches almost match the distance between the printed circuit boards, and one end of which sandwiches the left and right ends of the hanger body. The pivot point is movably pivoted to the side of the hanger body, and the other end, the swinging tip, extends outward from the pivot point in a substantially horizontal direction and extends vertically along the side of the hanger body. Two pairs of swinging members that are able to swing freely in a plane are engaged with the swinging tips of each swinging member so as to be guided in a substantially tangential direction, and one of the corresponding sides of the horizontal wavy member is connected to the lower end of the swinging member. Two pairs of supporting slide rods and a slide rod lifting member fixed to the upper end of each slide rod so as to be positioned above the photosensitive film coating tank and ride on a stopper member provided above the tank when lowering the tank. A printed circuit board hanger comprising: