JP2003342788A - Liquid leakage preventing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid leakage preventing device with which the jetting distance of a treatment liquid from the space between seal rollers is suppressed to reduce the length of a liquid receiving tank, a work is made wet so that the phenomenon that the surface of the work is dried during its transfer to the following treatment tank and the defect of quality is caused can be prevented, and the resistance of the work on the penetration into the space between the seal rollers is reduced, thereby preventing the running-off of the work from a chuck. <P>SOLUTION: In the liquid leakage preventing device where the side wall through which a work comes in or goes out of the body 1 of a treatment tank is provided with slits 2 and 3 in the vertical direction for allowing the work to come in and go out and liquid leakage is prevented by pairs of seal rollers 6, 6 and 7, 7 arranged adjacently to the slits 2 and 3, liquid feeding mechanisms 8 and 9 for letting liquids fall to the outsides of the seal rollers 6, 6 and 7, 7 from the upper parts are provided. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid leakage prevention device for preventing a processing liquid from leaking from an inlet / outlet of a processing tank in a plating device for plating a flat work while transferring it in a vertical posture. .

[0002]

2. Description of the Related Art As a device for plating a flat plate-like work such as a printed circuit board, various types are provided. Among these devices, the plating device that continuously transfers a flat work piece in a vertical posture does not require a jig, and is equipped with a bath liquid jet mechanism that enables high-speed plating. It is often used because it exists. In a plating apparatus that continuously transfers such flat work pieces in a vertical posture, since the flat work pieces enter and leave the treatment tank below the treatment liquid surface, leakage of the treatment liquid from the inlet / outlet becomes a problem. A processing device such as, for example, Japanese Patent Publication No. 9-505638, provided with a device for preventing leakage has been considered.

The liquid leakage prevention device provided in the device of Japanese Patent Laid-Open No. 9-505638 has a vertical orientation corresponding to a slit provided in an end wall of a processing tank for allowing a workpiece to pass through, and is loosely opposed to the processing bath. The rollers and the like arranged in the form of a seal are arranged as a seal, and these rollers and the like are pressure-bonded to each other or to the end wall of the processing tank by liquid pressure. Various other similar liquid leak prevention devices have been proposed, but all of them have a high liquid level of the processing liquid when a flat work enters between the seal rollers, so that the surface of the work between the work and the seal rollers is It was unavoidable that the processing liquid in the processing tank spouted along the horizontal direction. Moreover, the distance that the processing liquid is ejected horizontally along the work surface tends to be longer in the lower part due to the hydraulic pressure, but it is not uniform, and the part where the amount of liquid adheres is transferred to the next processing tank. In the meantime, the surface of the work may be dried and subjected to air oxidation, resulting in uneven quality such as color unevenness and poor adhesion.

Further, since the dimension of the work in the height direction is always shorter than the length of the seal roller, when the work is sandwiched between the seal rollers, a gap is formed in a portion where no work exists between the seal rollers. There is a problem that the processing liquid is also jetted from the gap. In such a liquid leakage prevention device, a certain liquid leakage is unavoidable and a tank for receiving the leaked liquid is provided, and the leaked liquid is returned to the processing tank by a pump. The length of the liquid receiving tank for receiving the jetted processing liquid is determined according to the jetting distance of the processing liquid. However, when the liquid level of the processing liquid is high, the jetting distance also becomes long, so that the length is adjacent. In order to prevent the treatment liquid in the treatment tank from being mixed, it is necessary to lengthen the liquid receiving tank, which causes a problem that the entire apparatus becomes long and a large installation area is required.

Further, when the work enters between the seal rollers, the entire length in the height direction of the work enters the space between the seal rollers at one time, so that a large resistance is exerted, and the chuck on the upper part of the work connected to the drive device. There was a problem that the work might come off. Even if it does not come off, the work shifts from the chuck and the work tilts, and the tilt of the work accumulates due to the resistance of the seal roller as the work is received when entering or exiting each treatment tank while sequentially passing through the treatment tank. There was a problem of getting out of.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and can suppress the jetting distance of the processing liquid from between the seal rollers to shorten the length of the liquid receiving tank and wet the work. As a result, the surface of the work does not become dry and the quality of the work does not deteriorate until it is transferred to the next processing tank, and the work does not come off from the chuck by reducing the resistance when entering the work between the seal rollers. This is done to provide a liquid leakage prevention device.

[0007]

SUMMARY OF THE INVENTION A liquid leakage prevention device of the present invention made to solve the above problems is provided with a vertical slit for inserting and removing a work on a side wall of a processing tank where a work enters and exits. In a liquid leakage prevention device for preventing liquid leakage by a pair of seal rollers arranged in close proximity to each other, a liquid supply mechanism for dropping the liquid from above is provided outside the sealing portion of the seal roller. It is what In this seal roller, it is preferable that the upper end of the seal roller is inclined rearward in the traveling direction of the work, and it is preferable that the seal roller is divided into a plurality in the length direction.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the liquid leakage prevention device of the present invention will be specifically described with reference to the drawings. FIG. 1 is a plan view, in which a slit 2 is provided in the side wall on the work inlet side of the processing tank main body 1, and a slit 3 is provided in the vertical direction on the side wall on the opposing work outlet side. Sealing roller accommodating chambers 4, 4 and 5, 5 are provided on both sides of the slits 2 and 3 on the outside of the processing tank main body 1, and inside the sealing roller accommodating chambers 4, 4 and 5, 5 are circles, respectively. The columnar seal rollers 6, 6 and 7, 7 are accommodated and are movable in the horizontal direction within a range of slightly exceeding the maximum thickness of the work.

Here, the inlet side seal roller accommodating chambers 4 and 4 are inclined so that the upper side is outside the processing tank 1 and the outlet side seal roller accommodating chambers 5 and 5 are lower side away from the processing tank 1. The seal rollers 6, 6 and 7, 7 accommodated in the seal roller accommodating chambers 4, 4 and 5, 5 are inclined. That is, in this inclination direction, the upper ends of the seal rollers 6, 6 and 7, 7 are inclined rearward in the traveling direction of the work, and the inclination angle is preferably 1 to 5 degrees with respect to the vertical line. Further, it is preferable that the surfaces of the seal rollers 6, 6 and 7, 7 are made of an elastic material which enhances the sealing performance and does not damage the work and has excellent chemical resistance, and is divided into a plurality of parts in the length direction.

Above the seal roller accommodating chambers 4, 4, 5 and 5, there are provided treatment liquid guides 8, 8 and 9, 9 which are slits, respectively. Liquid inlets 10, 10 and 1 located on both sides of 2 and 3
The processing liquid overflowing from Nos. 1 and 11 is guided to fall outside the seal roller accommodating chambers 4, 4 and 5, 5 at right angles to the advancing direction of the work. The liquid guiding gutters 8, 8 and 9, 9 serve as a liquid supply mechanism for dropping the liquid from the upper portions of the seal rollers 6, 6 and 7, 7.

The seal roller accommodating chambers 4 and 4 and the liquid guiding trough 8,
8 and the seal roller accommodating chambers 5 and 5 and the liquid guiding troughs 9 and 9 are integrally formed seal units 12 and 1 as shown in FIG.
2 and 13, 13 are preferable. The seal units 12, 12 and 13, 13 formed in this way are attached to the openings 14 and 15 provided on the side walls of the processing tank main body 1 on the inlet side and the outlet side of the work, and the gap between the seal roller accommodating chambers 4 and 4 is increased. The gaps between the seal roller accommodating chambers 5 and 5 are slits 2 and 3, respectively. Figure 3
1 shows the seal unit 12 located on the upper right side in FIG. 1, and the seal unit 12 forming a pair is molded in a symmetrical shape, and the seal units 13, 13 are seal roller accommodating chambers 5, 5, 5. Is shaped with the inclination direction of the opposite.

Liquid receiving tanks 16 and 17 are provided outside the seal roller accommodating chambers 4, 4 and 5, 5, respectively. In the liquid receiving tanks 16 and 17, the seal rollers 6, 6 and 7,
The processing liquid leaked from between 7 and the processing liquids dropped from the liquid guide gutters 8, 8 and 9, 9 are collected and pumped up by a pump (not shown) and returned to the processing tank body 1. Needless to say, if necessary, a reinforcing rib or the like is provided on the processing tank main body 1, a jetting device, a circulating device, a stirring device or the like of the processing liquid is provided in the chemical liquid tank, and a shower device or the like is provided in the washing tank.

A plurality of the processing bath main bodies 1 having the above-described structure are linearly arranged according to the processing steps to form a plating line, and a transfer device (not shown) for transferring the work W is provided. A conventionally known structure can be used as the transfer device. The treatment tank main body 1 is filled with a treatment liquid, cleaning water, etc., which are required according to the treatment process. The work W enters the processing tank main body 1 through the slit 2 on the inlet side and exits through the slit 3 on the outlet side as shown by the arrow, and the next processing is performed from the slit 2 on the inlet side of the next adjacent processing tank main body 1. Enter the tank body 1.

Before the work W enters, a set of two sealing rollers 6, 6 and 7, 7 are set by the sealing roller accommodating chambers 4, 4, 5 and 5 by the liquid pressure of the chemical solution in the processing tank body 1.
It is pressed against the outer end surface of the to prevent leakage of processing liquid. When the work W enters between the seal rollers 6, 6 or 7, 7, the seal rollers 6, 6 and 7, 7 can move in the seal roller accommodating chambers 4, 4 and 5, 5, so that the work W Can enter between the seal rollers 6, 6 or 7, 7 and the liquid leakage is suppressed as in the conventional liquid leakage prevention device.

The work W is a seal roller 6, 6 or 7,
Since the seal rollers 6, 6 and 7, 7 are slanted when entering the space between 7, the upper part of the work W first enters the space between the seal rollers 6, 6 or 7, 7 and gradually increases the total length in the height direction. Will enter between the seal rollers 6, 6 or 7, 7. Therefore, since the entire length of the work W in the height direction does not enter between the seal rollers 6, 6 or 7, 7 at a time, no large resistance is exerted, and the work W is removed from the chuck.
Does not come off or tilt. It should be noted that it is not preferable to make the inclination angles of the seal rollers 6, 6 and 7, 7 excessively large because the seal rollers 6, 6 or 7, 7 may rise while rotating when the work W enters.

When the work W enters between the seal rollers 6, 6 or 7, 7, the work W and the seal roller 6,
The processing liquid in the processing tank main body 1 is jetted horizontally from between 6 or 7 and 7 along the surface of the work W, and after the work W enters, the work W between the seal rollers 6, 6 or 7, 7 is In the present invention, the processing liquid is ejected in the horizontal direction from the gap between the nonexistent portions, as in the conventional case. In the present invention,
Since the liquid guiding gutters 8, 8 and 9, 9 are provided so as to drop the processing liquid outside the seal roller accommodating chambers 4, 4, 5 and 5 at right angles to the traveling direction of the work, this processing liquid is used. When it hits, it flows vertically. The processing liquids jetted out in the horizontal direction hit the flowing processing liquids and are changed in direction downward, so that the distances of the processing liquids jetted out in the horizontal direction are shortened. Therefore, the length of the liquid receiving tanks 16 and 17 can be shortened. If the seal rollers 6, 6 and 7, 7 are divided into a plurality of pieces in the lengthwise direction, the seal rollers 6, 6 or 7 are located in a portion where no work W exists between the seal rollers 6, 6 or 7, 7. , 7 are in direct contact with each other, so that the processing liquid can be prevented from leaking from that portion.

[0017]

According to the present invention described above, the treatment liquid is made to drop from the upper part to the outside of the sealing portion of the seal roller, so that the direction of the treatment liquid ejected horizontally along the surface of the work is changed. It can be changed downward, and the workpiece can be surely wetted by the falling processing liquid. As a result, it is possible to shorten the horizontal spraying distance of the processing liquid, so that even if the length of the receiving tank is shortened, the processing liquid in the adjacent processing tank does not mix and is transferred to the next processing tank. There is an advantage that the surface of the work does not become dry and the quality of the work does not deteriorate until the time comes. Moreover, since the length of the liquid receiving tank can be shortened, there is also an advantage that the entire apparatus can be downsized. When a liquid guide trough is used as a liquid supply mechanism for dropping the processing liquid from the upper part to the outside of the seal portion of the seal roller, there is an advantage that the structure is simple and no power is required. Further, by inclining the seal rollers, a large resistance is not applied when the work enters the space between the seal rollers, and the work does not come off from the chuck or shift. Therefore, it greatly contributes to the industry as providing a liquid leakage prevention device that solves all the conventional problems.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing an embodiment of the present invention.

FIG. 3 is a perspective view showing a seal unit.

FIG. 4 is an enlarged plan view showing a seal portion on the workpiece inlet side.

FIG. 5 is an enlarged plan view showing a seal portion on the work outlet side.

[Explanation of symbols]

1 Processing tank body A few slits 4,5 seal roller housing 6, 7 Seal roller 8 and 9 liquid transfer gutter 10, 11 liquid intake 12, 13 Seal unit 14, 15 openings 16, 17 Liquid receiving tank W work

Claims (3)

[Claims] 1. A liquid leak for preventing a liquid leak by providing a vertical slit for loading and unloading a work on a side wall of the processing tank where a work enters and exits, and a pair of seal rollers arranged in proximity to the slit. In the prevention device, a liquid leakage prevention device characterized in that a liquid supply mechanism for dropping the liquid from above is provided outside the sealing portion of the seal roller. 2. The liquid leakage prevention device according to claim 1, wherein the upper end of the seal roller is inclined rearward in the traveling direction of the work. 3. The liquid leakage prevention device according to claim 1 or 2, wherein the seal roller is divided into a plurality of parts in the lengthwise direction.