JP2004027279A - Device for preventing leakage of liquid from plating tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for preventing the leakage of liquid from a plating tank using seal rollers by which the disengagement and slippage of a work from a chuck can be prevented when the work is introduced between the seal rollers. <P>SOLUTION: Vertical slits 2 and 3 for taking the work in and out are provided to the sidewall, of a main body 1 of a treatment tank, through which the work is put in and out. The leakage of liquid can be prevented by means of seal rollers 6 in pairs and seal rollers 7 in pairs, both of which are provided in close vicinity to the slits 2 and 3, respectively. The seal rollers 6 and the seal rollers 7 are inclined from the vertical direction in the plane parallel to the work surface. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plating tank liquid leak preventing apparatus for preventing a processing liquid from leaking from an inlet / outlet of a processing tank in a plating apparatus for plating while transferring a flat work in a vertical posture.
[0002]
[Prior art]
Various types of apparatuses are provided as apparatuses for plating a flat work such as a printed circuit board. Among these devices, the plating device that continuously transfers a flat work in a vertical position does not require a jig, and is equipped with a bath liquid jet mechanism to perform high-speed plating. It is often used because of its existence. In a plating apparatus that continuously transfers such a flat work in a vertical position, since the flat work enters and exits the processing tank below the surface of the processing liquid, leakage of the processing liquid from the inlet and outlet poses a problem. For example, a processing apparatus having a device for preventing leakage, such as Japanese Patent Application Laid-Open No. 9-505638, has been considered.
[0003]
The apparatus for preventing a liquid from leaking from a plating tank provided in the apparatus of Japanese Patent Application Laid-Open No. 9-505638 loosely inserts into a processing bath in a vertical direction corresponding to a slit provided on an end wall of the processing tank for passing a work. The rollers and the like arranged as a seal are arranged as a seal, and these rollers and the like are pressed against each other or the end wall of the processing tank by hydraulic pressure with each other or each time. Various other similar devices for preventing liquid leakage from a plating tank have been proposed, but in all cases, the seal roller is provided vertically.
[0004]
Generally, a flat work such as a printed circuit board to be processed has a rectangular shape at the time of processing, and the front edge of each work is vertical. The total length in the height direction is to enter between the seal rollers at one time. As a result, the work receives a large resistance, and the work may come off from the chuck on the upper part of the work connected to the drive device. In addition, there is a problem in that the inclination is accumulated due to the resistance of the seal roller received when entering and exiting each processing tank, and the work comes off the chuck.
[0005]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-described problems and to provide a plating tank liquid leakage preventing device that does not cause the workpiece to be detached or shifted from the chuck when the workpiece enters between the seal rollers. is there.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a plating tank solution for preventing liquid leakage in a plating tank. In a liquid leakage prevention device for a plating tank, which prevents liquid leakage by a pair of two seal rollers disposed close to a slit, the seal roller is inclined from a vertical direction in a plane parallel to a work surface. It is a feature. The inclination direction of the seal roller is preferably such that the upper end of the seal roller is closer to the rear in the traveling direction of the work with respect to the vertical direction, and a liquid supply mechanism for dropping the liquid from above to the outside of the seal portion of the seal roller. Is preferably provided. Further, it is preferable that the seal roller is divided into a plurality in the length direction.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of a device for preventing liquid leakage from a plating tank 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 a side wall of a processing tank main body 1 on a work entrance side, and a slit 3 is provided in a side wall of an opposite work exit side in a vertical direction. Outside the treatment tank main body 1, seal roller storage chambers 4, 4, 5 and 5 are provided on both sides of the slits 2 and 3, respectively. The columnar seal rollers 6, 6 and 7, 7 are housed in a state in which they can be moved in the horizontal direction within a range slightly exceeding the maximum thickness of the work.
[0008]
Here, the seal roller housing chambers 4 and 4 on the inlet side are inclined such that the upper side is outside the processing tank 1 and the seal roller housing chambers 5 and 5 on the outlet side are separated so that the lower side is outside the processing tank 1. The seal rollers 6, 6, 7, and 7 accommodated in the roller accommodation chambers 4, 4, 5, and 5 are inclined. That is, this inclination direction is obtained by inclining the upper ends of the seal rollers 6, 6 and 7, 7 backward 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, 7 and 7 are made of an elastic material having excellent chemical resistance which does not damage the work by increasing the sealing performance and is divided into a plurality of pieces in the length direction.
[0009]
The seal roller storage chambers 4 and 4 and the seal roller storage chambers 5 and 5 are preferably formed as formed seal units 8, 8 and 9, 9 as shown in FIG. The seal units 8, 8 and 9, 9 thus formed are attached to the openings 10 and 11, which are provided largely on the inlet and outlet side walls of the work of the processing tank main body 1, and the gap between the seal roller storage chambers 4, 4 is provided. The gaps between the seal roller storage chambers 5 and 5 are defined as slits 2 and 3, respectively. FIG. 3 shows the seal unit 8 located at the upper right in FIG. 1. The seal units 8 forming a pair are formed in a symmetrical shape. 5 are formed with the inclination direction reversed.
[0010]
Liquid receiving tanks 12 and 13 are provided outside the seal roller storage chambers 4, 4, 5 and 5, respectively. The liquid receiving tanks 12 and 13 receive and collect the processing liquid leaked from between the seal rollers 6, 6, 7, and 7, and pump up by a pump (not shown) to return to the processing tank main body 1. Needless to say, if necessary, a reinforcing rib or the like is provided on the processing bath main body 1, a jetting device, a circulating device, a stirring device or the like of the processing liquid is provided in the chemical bath, and a shower device or the like is provided in the washing bath.
[0011]
A plurality of the processing tank bodies 1 configured as described above 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 configuration can be used for the transfer device. The processing tank body 1 is filled with a processing liquid, a washing water, and the like necessary according to the processing steps. The work W enters the processing tank body 1 through the slit 2 on the inlet side as shown by the arrow, exits from the slit 3 on the outlet side, and passes through the slit 2 on the inlet side of the next adjacent processing tank body 1 to perform the next processing. It enters the tank body 1.
[0012]
Before the work W enters, a pair of seal rollers 6, 6, 7 and 7 are formed on the outer end surfaces of the seal roller storage chambers 4, 4, 5 and 5 by the liquid pressure of the chemical solution in the processing tank body 1. It is pressed down, preventing the leakage of the processing solution. When the workpiece 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 storage chambers 4, 4, 5, 5, 5, so that the workpiece W Can enter between the seal rollers 6, 6 or 7, 7, and the liquid leakage is suppressed in the same manner as the conventional liquid leakage prevention device for a plating tank.
[0013]
When the work W enters the space between the seal rollers 6, 6 or 7, 7, the seal roller 6, 6, and 7, 7 is inclined. The entire length in the height direction gradually enters 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 at a time between the seal rollers 6, 6, or 7, 7, there is no large resistance, and the work W does not come off or tilt from the chuck.
[0014]
Since the upper ends of the seal rollers 6, 6 and 7, 7 are inclined backward in the traveling direction of the work, the work W faces downward when the work W enters between the seal rollers 6, 6 or 7, 7. As a result, an upward force acts on the seal rollers 6, 6 and 7, 7, respectively. If the inclination angles of the seal rollers 6, 6, 7, and 7 are excessively large, the seal rollers 6, 6, or 7, 7 rotate when the workpiece W enters, and thus it is not preferable.
[0015]
When the seal rollers 6, 6 and 7, 7 are divided into a plurality of parts in the length direction, when the work W enters between the seal rollers 6, 6 or 7, 7, the divided seal rollers 6, Since the approach is made with only a part between 6 or 7 and 7 separated, there is an advantage that the resistance received by the work W during the approach is further reduced. In a portion where the work W does not exist between the seal rollers 6, 6, 7 or 7, the seal rollers 6, 6 or 7, 7 come into direct contact with each other, so that the leakage of the processing liquid from that portion can be eliminated. .
[0016]
In the above-described embodiment, the upper ends of the seal rollers 6, 6 and 7, 7 are inclined backward in the traveling direction of the work. However, the inclination direction may be reversed. When the inclination direction is reversed, an upward force is applied to the work W when the work W enters between the seal rollers 6, 6 or 7, 7, and the seal rollers 6, 6 and 7, 7 are applied to the work W. Each downward force will work. The transfer device and the attached chuck used for this type of plating line are generally adapted to suspend a work and cope with a downward load, and the inclination direction of the seal rollers 6, 6 and 7, 7 In the case of reversing the above, it is necessary to use a transfer device and a chuck capable of coping with an upward load.
[0017]
6 to 10 show another embodiment. In this alternative embodiment, liquid guide gutters 14, 14, 15, and 15 are provided above the seal roller storage chambers 4, 4, 5, and 5. Numerals 15, 15 guide the processing liquid overflowing from the liquid inlets 16, 16, 17, 17 located on both sides of the slits 2, 3, respectively, and move the processing liquid to the outside of the seal roller storage chambers 4, 4, 5, 5. And fall at right angles. The liquid supply gutters 14, 14, 15, and 15 constitute a liquid supply mechanism for dropping liquid from above the seal rollers 6, 6, 7, 7.
[0018]
As shown in FIG. 8, the liquid guide gutters 14, 14, 15, and 15 together with the liquid inlets 16, 16, 17, and 17 and the seal roller storage chambers 4, 4, 5, and 5 seal the seal units 8, 8, 9, and 9. The seal units 8, 8 and 9, 9 thus formed are attached to the openings 10 and 11 provided largely on the inlet and outlet side walls of the work of the processing tank main body 1, and the seal roller storage chamber is provided. Preferably, the gaps between 4, 4 and the gaps between the seal roller storage chambers 5, 5 are slits 2 and 3, respectively. FIG. 8 shows the seal unit 8 located at the upper right in FIG. 6, in which the set of the seal units 8 is formed in a symmetrical shape. Molding with the inclination direction reversed is the same as that of the embodiment.
[0019]
In this alternative embodiment, liquid guide gutters 14, 14 and 15, 15 are provided to guide the processing liquid overflowing from liquid inlets 16, 16, 17, 17, 17 to seal roller storage chambers 4, 4, and The processing liquid is caused to fall to the outside of the work 5 and 5 at right angles to the traveling direction of the work, and the processing liquid falls vertically on the work. The flowing down processing liquid impinges on the processing liquid in the processing tank body 1 which is jetted horizontally between the work and the seal roller along the work surface, and changes the direction of the processing liquid downward.
[0020]
That is, when the flat work enters between the seal rollers 6, 6, 7 and 7, the processing liquid in the processing tank is disposed along the work surface from between the work and the seal roller because the processing liquid level is high. Are ejected in the horizontal direction, and the dimension in the height direction of the work is always shorter than the length of the seal roller, so that there is no work between the seal rollers when the work is sandwiched between the seal rollers. It is inevitable that a gap is formed in the portion and the processing liquid is ejected from the gap. The ejected processing liquid is received in the liquid receiving tank and returned to the processing tank by the pump. However, if the processing liquid is ejected for a long distance, the processing liquid in the adjacent processing tank is prevented from mixing. Therefore, there is a problem that the length of the entire apparatus becomes long and a large installation area is required.
[0021]
Since the direction of the processing liquid ejected by the flowing down processing liquid is changed downward, the distance of the ejection of the processing liquid can be shortened, so that the length of the liquid receiving tanks 12 and 13 can be shortened, and the length of the entire apparatus can be reduced. It can be shortened. Further, since the work is surely wetted by the processing liquid flowing down, the surface of the work is not dried and the quality is not deteriorated before being transferred to the next processing tank. The use of a liquid guide gutter as the liquid supply mechanism has the advantage that the configuration is simple and no power is required.
[0022]
【The invention's effect】
According to the present invention described above, since the seal roller is inclined, there is an advantage that the work does not receive a large resistance when entering the space between the seal rollers, and the work does not come off or shift from the chuck. . Therefore, it is extremely important to contribute to the industry as to provide a plating tank liquid leakage prevention device that solves the conventional problems.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of the present invention.
FIG. 2 is a longitudinal 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 a work entrance side.
FIG. 5 is an enlarged plan view showing a seal portion on the work outlet side.
FIG. 6 is a plan view showing another embodiment of the present invention.
FIG. 7 is a longitudinal sectional view showing another embodiment of the present invention.
FIG. 8 is a perspective view showing a seal unit according to another embodiment.
FIG. 9 is an enlarged plan view showing a seal portion on a work entrance side in another embodiment.
FIG. 10 is an enlarged plan view showing a seal portion on the work outlet side in another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Processing tank main body 2, 3 Slit 4, 5 Seal roller accommodating chamber 6, 7 Seal roller 8, 9 Seal unit 10, 11 Opening 12, 13 Liquid receiving tank 14, 15 Liquid guide gutter 16, 17 Liquid inlet W Work

Claims (4)

A slit is provided on the side wall of the processing tank for processing the flat work where the work enters and exits, and a vertical slit for entering and exiting the work is provided, and a set of two seal rollers disposed close to the slit prevents liquid leakage. A liquid leakage prevention device for a plating tank, wherein a seal roller is inclined from a vertical direction in a plane parallel to a work surface. The device for preventing a liquid from leaking from a plating tank according to claim 1, wherein the inclination direction of the seal roller is set such that the upper end of the seal roller is closer to the rear side in the traveling direction of the work than the vertical direction. 3. The apparatus for preventing a liquid from leaking from a plating tank according to claim 1, wherein a liquid supply mechanism for dropping the liquid from above is provided outside the seal portion of the seal roller. 4. The apparatus according to claim 1, wherein the seal roller is divided into a plurality of parts in a longitudinal direction.

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