JP4038194B2 - Insoluble electrode, electrode plate used therefor, and method of using the same - Google Patents

Description

  The present invention relates to an insoluble electrode that is immersed in an acidic liquid and energized, an electrode used therefor, and a method of using the insoluble electrode.

  In an electroplating facility in which zinc or the like is plated on the surface of a steel sheet by running the steel sheet between two electrodes immersed in a dilute sulfuric acid plating solution, an electrode using lead or a lead alloy is used. It was. However, when lead or a lead alloy is used as an electrode, lead elutes in the plating solution and a large amount of sludge is generated. The sludge generated in this way has a great adverse effect on the quality of the steel plate plated with zinc or the like, such as adhering to the surface of the steel plate running between the two electrodes. Therefore, an insoluble electrode having an electrode plate based on a valve metal such as titanium or a valve metal base alloy and an energizing plate based on a valve metal or a valve metal base alloy in the same manner as the electrode plate is widely used. The insoluble electrode energizes the electrode plate by bringing the electrode plate and the energizing plate into contact with each other.

  In such an insoluble electrode, in order to improve the electrical conductivity between the electrode plate and the current plate, platinum is coated on each contact surface between the current plate and the electrode plate. While the electroplating facility is in operation, an anodic oxide film is formed on the surfaces of the electrode plate and the current plate, so that the electrode plate and current plate are not corroded. However, when the operation of the electroplating equipment is stopped, the plating solution that has entered the narrow gap where the electrode plate and the current plate come into contact stays in the narrow gap and is concentrated. Then, at least one of the contact surface of the current plate and the contact surface of the electrode plate is corroded, and the platinum coated on the surface of the contact surface is peeled off, so it is necessary to repair the platinum by recoating. is there. However, it is very expensive to recoat platinum on the contact surface of the current plate or the contact surface of the electrode plate. Therefore, an insoluble electrode that prevents the plating solution from entering between the electrode plate and the current-carrying plate by adhering a thin layer of flexible lead or lead alloy between the electrode plate and the current-carrying plate. Has been proposed (see Patent Document 1).

JP 7-331495 A

  However, if a thin layer of lead or a lead alloy is interposed between the electrode plate and the current plate, the current-carrying effect of platinum is exhibited even if the contact surface of the electrode plate or electrode plate is covered with platinum. There is a problem that cannot be done.

  The present invention has been made in view of the above problems, and prevents corrosion of the contact surface while maintaining the current-carrying effect of platinum coated on each contact surface where the current plate and the electrode plate are in contact. It is an object of the present invention to provide the insoluble electrode shown, an electrode plate used therefor, and a method of using the same.

Means for Solving the Problems and Effects of the Invention

  In the present invention, the following features are provided alone or in combination as appropriate. An insoluble electrode according to the present invention for solving the above-mentioned problem is an insoluble electrode immersed in an acidic solution and energized, and has a first surface region in which the surface of a substrate is coated with platinum or a metal containing platinum. An electrode plate, a current plate having a second surface region to which the electrode plate is attached and platinum or platinum-containing metal is coated on a surface of the substrate, and a closed region, the first surface A first seal member disposed between the electrode plate and the energization plate so that at least a part of the region and at least a part of the second surface region are located in the closed region. The electrode plate and the energization are made so that the first surface region and the second surface region are in contact with each other in the closed region of the first seal member while deforming the first seal member. It is characterized by the fact that the board is fixed That.

  Here, the “closed region” does not mean a region where all the three-dimensional directions are closed, but means a region closed on a plane.

  According to this configuration, the acidic liquid can be prevented from entering the closed region of the first seal member. In addition, by bringing the first surface region and the second surface region into contact with each other in the closed region of the first seal member, the energization effect of platinum or a metal containing platinum coated on these contact surfaces can be obtained. It is possible to prevent corrosion of the contact surface while maintaining it. Moreover, since it is considered that the frequency of re-coating platinum or a metal containing platinum on the contact surface of the current-carrying plate or the contact surface of the electrode plate is reduced, it is advantageous in terms of cost. Note that the first seal member is preferably an elastic member.

  The insoluble electrode of the present invention is a closed region of the first seal member, a through hole penetrating at least one of the electrode plate and the energizing plate, and the electrode plate disposed in the through hole And a fixing bolt for fixing the energizing plate.

  According to this configuration, the first seal member is deformed, the first surface region and the second surface region are brought into contact with each other in the closed region of the first seal member, and the electrode plate and the current plate are All of the fixing can be realized by fixing bolts. More preferably, the fixing bolt fixes the electrode plate and the current-carrying plate at a substantially central portion of the closed region of the first seal member. By doing so, it becomes possible to deform the portion forming the closed region of the first seal member substantially uniformly over the entire circumference. As a result, the intrusion of the acidic liquid from the first seal member can be prevented more reliably, and the first surface region and the second surface region can be brought into surface contact over almost the entire surface without being biased. It is thought that the energization effect can be exhibited.

  In the insoluble electrode according to the present invention, the first sealing member has a closed region, the fixing bolt is disposed in the closed region, and between the electrode plate and the energizing plate. It is preferable to further include a second seal member disposed in the closed region.

  The insoluble electrode of the present invention further includes a third seal member that prevents an acidic liquid from entering the contact surface between the first surface region and the second surface region on the side wall of the through hole. Preferably it is.

  According to these structures, it is possible to prevent the acidic liquid from entering the closed region of the first seal member through the through hole of the fixing bolt. Therefore, while fixing the electrode plate and the current-carrying plate, it is possible to prevent corrosion of the contact surfaces where they are in contact with each other and to exert a larger current-carrying effect. In these cases, it is preferable that the first seal member is disposed along an outer peripheral portion of at least one of the first surface region and the second surface region. The maximum current-carrying effect can be exhibited, and it is possible to prevent platinum or platinum-containing metal coated on the surface from corroding from the outer peripheral portion of the first or second surface region and propagating it. It is. The second seal member and the third seal member are also preferably elastic members.

  The method of using the insoluble electrode of the present invention is a method of using an insoluble electrode immersed in an acidic solution and energized, and the surface of the electrode plate and the surface of the current plate to which the electrode plate is attached are platinum or a metal containing platinum. The first surface region and the second surface region are formed by coating the surface of the electrode plate having the first surface region and the surface of the current-carrying plate having the second surface region. A seal member having a closed region is disposed, and the electrode plate and the current plate are arranged so that the first surface region and the second surface region are in contact with each other in the closed region of the seal member. It is fixed.

  According to this method of use, the acidic liquid can be prevented from entering the closed region of the seal member. Further, by contacting the first surface region and the second surface region in the closed region of the seal member, the contact surface is corroded while maintaining the current-carrying effect of the platinum coated on these contact surfaces. Prevention can be achieved. Furthermore, since it is considered that the frequency of re-coating platinum on the contact surface of the energization plate or the contact surface of the electrode plate is reduced, it is advantageous in terms of cost.

  The electrode plate of the present invention is an electrode plate immersed in an acidic solution and energized via an energizing plate, and a surface region in which the surface of a base is coated with platinum or a metal containing platinum, and the surface region A cutout portion formed so that a seal member can be mounted at a position surrounding the surface area, and when fixed to the current-carrying plate, the seal member prevents the acid liquid from entering the surface area. In addition, the surface region is energized from the energizing plate.

  According to this, it is possible to provide an electrode plate that can be attached to the current-carrying plate so that the seal member is attached to the notch and the surface region is in contact with the current-carrying plate while the seal member is deformed. Thus, even if the electrode plate attached to the energizing plate is used while being immersed in an acidic solution, the acidic solution is unlikely to enter the surface region of the electrode plate from the outside. Therefore, it is considered that the frequency of re-coating platinum or platinum-containing metal coated on the surface region is reduced, which is advantageous in terms of cost. Further, since this surface region is energized via the energizing plate, the energizing effect by platinum or a metal containing platinum is also exhibited.

  Next, preferred examples of the first to sixth embodiments according to the present invention will be described below with reference to the drawings.

  First, the contents common to the first to sixth embodiments will be described with reference to FIGS. Here, FIG. 1 is an overall schematic diagram of an electroplating facility for electroplating zinc or the like on the surface of a steel plate (hereinafter referred to as “strip”) 50, and FIG. 2 is a side of the strip 50 shown in FIG. FIG. 3 is a cross-sectional view taken along line AA shown in FIG.

  In FIG. 1, the strip 50 travels in a horizontal state in the direction of the arrow X between a pair of plating cells 2 and 3 that are arranged to face each other vertically. An insoluble electrode 20 is attached to each of the upper cell 2 and the lower cell 3, and the insoluble electrode 20 is disposed so as to face the strip 50 so that the strip 50 can travel between them. The dilute sulfuric acid plating solution 4 is supplied into the plating cells 2 and 3 from the plating solution supply pipes 5 and 6, and the plating solution 4 in the plating cells 2 and 3 is recovered from the plating solution recovery pipe 8 through the overflow tank 7. The The plating solution 4 recovered from the plating solution recovery pipe 8 is once again returned to the plating solution circulation tank (not shown), but is again supplied from the plating solution circulation tank to the plating cells 2 and 3 and circulated. It should be noted that the plating solution in the plating cells 2 and 3 is always plated by reducing the flow rate of the plating solution recovered from the plating solution recovery pipe 8 rather than the flow rate of the plating solution supplied from the plating solution supply pipes 5 and 6 to the plating cells 2 and 3. The amount of liquid 4 is kept above a certain amount. That is, the strip 50 traveling between the pair of upper and lower plating cells 2 and 3 is immersed in the plating solution 4 and travels. Therefore, the plating solution 4 overflowed from the plating cells 2 and 3 flows out into the overflow tank 7 and is recovered from the plating solution recovery pipe 8 through the overflow tank 7.

  The plating cells 2 and 3 are made of an electrical insulator such as a resin and are supplied with power to the insoluble electrodes 20 attached to the plating cells 2 and 3. Power feeding is performed by electrically connecting the positive side of the rectifier 9 to the insoluble electrode 20 and the negative side to the conductor roll 10. In order to prevent C warpage of the strip 50, the backup roll 11 is disposed below the conductor roll 10, and the strip 50 travels between the conductor roll 10 and the backup roll 11.

  In the electroplating equipment 1 shown in FIG. 1, only two plating cells 2 and 3 arranged in a pair in the upper and lower directions are arranged in the horizontal direction, but more plating cells 2 and 3 are arranged. It is common. This is to obtain an excellent quality plated steel sheet. Although not shown in FIG. 1, the steel plate electroplating facility 1 is generally provided with a pretreatment facility and a posttreatment facility.

  2 and 3, the insoluble electrode 20 includes an electrode plate (sometimes referred to as a “discharge plate”) 21 and a current plate 30. More specifically, a plurality of electrode plates 21 are attached to one energizing plate 30 by fixing bolts 18 (see FIG. 3). And the rectangular insulating resin board 13 is attached with the volt | bolt 14 along the outer peripheral part of the electricity supply board 30 so that the some electrode plate 21 may be enclosed (refer FIG. 2). Further, the insulating resin plate 13 is attached by bolts 14 between the electrode plates 21 and in the direction in which the strip 50 travels. In addition, power is supplied to the insoluble electrode 20 via the bus bar 12 in a state where the amount of the plating solution 4 in the plating cells 2 and 3 is maintained at a certain level or more, that is, in a state where the insoluble electrode 20 is immersed in the plating solution 4. This is performed by supplying power to the current supply plate 30 and supplying power to the electrode plate 21 (see FIG. 3). The bus bar 12 is composed of a copper-based member to improve the electrical conductivity, and the surface is lined with a titanium plate to prevent corrosion due to exposure to the plating solution 4. .

  Next, 1st Embodiment-6th Embodiment which concerns on the insoluble electrode 20 of this invention is described, referring FIGS. 4-9. In addition, about each of the insoluble electrode 20, the electrode plate 21, the convex part 24, the convex surface area | region 25, and the electricity supply board 30, in 1st Embodiment-7th Embodiment, insoluble electrode 20A-20F and electrode plate 21A-21F. , Convex portions 24A to 24F, convex surface regions 25A to 25F, and energization plates 30A to 30F are denoted by reference numerals. First, the first embodiment will be described with reference to FIG. And in 2nd Embodiment-7th Embodiment, when other structures except an insoluble electrode, an electrode plate, a convex part, a convex surface area | region, and an electricity supply board are common in 1st Embodiment, FIG. 10, the same reference numerals as those in FIG. 4 are given, and the description thereof is omitted. Here, all of FIGS. 4 to 10 are detailed views of part B shown in FIG.

(First embodiment)
4A is a view of the insoluble electrode 20A before fixing the electrode plate 21A and the current-carrying plate 30A, and FIG. 4B is a view of the insoluble electrode 20A after fixing the electrode plate 21A and the current-carrying plate 30A. FIG.

In FIG. 4, the electrode plate 21A is made of titanium, and has a substantially square plate-like member as a base as shown in FIG. On one surface 22 of the electrode plate 21A, a plurality of columnar convex portions 24A are formed integrally with the electrode plate 21A. In addition, a planar surface region (a first surface region, which is referred to as a “convex surface region” in the present embodiment) 25A is formed at the tip of the convex portion 24A. The convex surface region 25A is coated with platinum 15 for the purpose of improving the electrical conductivity, and the other surface of the base except the convex surface region 25A is coated with IrO ₂ (iridium oxide) (not shown). . Note that the shape of the base of the electrode plate 21A is not limited to a substantially square shape, and may be a rectangular shape. Furthermore, an electrode plate through-hole 26 that penetrates the electrode plate 21A is formed in a substantially central portion of the convex portion 24A. The electrode plate through-hole 26 has a head hole 26a in which the head 18a of the fixing bolt 18 is disposed, and a screw hole 26b in which a female screw to be engaged with the male screw of the fixing bolt 18 is formed. . The head hole 26a is formed on the other surface 23 side of the electrode plate 21A, and the screw hole 26b is formed on the one surface 22 side (that is, the convex surface region 25A side) of the electrode plate 21A.

  A first step portion 27 (notched portion) that is notched over the entire circumference is formed on the outer peripheral portion of the convex surface region 25A. A first annular seal (first seal member) 16 is disposed on the step portion 27 formed in the convex surface region 25A. The first annular seal 16 is a region in which the outer peripheral portion of the seal 16 has a continuous continuity as represented by, for example, an O-ring and is closed on the inner side (diameter inner side in the case of an O-ring). Any elastic member may be used as long as it has a sealing effect. The first annular seal 16 is made of fluororubber having acid resistance and elasticity.

The energizing plate 30A is made of titanium, and has a rectangular plate-like member larger than the electrode plate 21A and smaller than the plating cells 2 and 3 as a base. Then, on one surface 31, a circular recess 33 having a cross-sectional shape that horizontally crosses the depth direction is similar to a cross-sectional shape that horizontally crosses the protruding direction of the convex portion 24A is formed on the electrode plate 21A. The same number as the convex portions 24A is formed. A planar surface region (second surface region, hereinafter referred to as “concave surface region”) 34 is formed at the bottom of the recess 33. The concave surface region 34 is coated with platinum 15 in order to improve the electrical conductivity, and the other surface of the base except the concave surface region 34 is coated with IrO ₂ . Furthermore, an energization plate through hole 35 that penetrates the energization plate 30 </ b> A is formed in a substantially central portion of the recess 33. The energizing plate through-hole 35 is formed with a female screw that is screwed with the male screw of the fixing bolt 18.

  The area of the cross section that horizontally crosses the protruding direction of the convex portion 24A is smaller than the area of the cross section that horizontally crosses the depth direction of the concave portion 33, and the height dimension of the convex portion 24A is larger than the depth dimension of the concave portion 33. Is also big. That is, the convex portion 24A can be disposed inside the concave portion 33, and the convex surface region 25A and the concave surface region 34 can be brought into surface contact. Further, when the electrode plate 21A and the energizing plate 30A are fixed with the fixing bolt 18, the insoluble electrode 20A is brought into surface contact with the convex surface region 25A and the concave surface region 34, and the one surface 22 of the electrode plate 21A and the energizing plate 30A. The one surface 31 is configured to face with a predetermined gap.

  The contact area between the convex surface area 25A and the concave surface area 34 is preferably large from the viewpoint of exerting an energization effect. Therefore, it is preferable that the surface roughness of the convex surface region 25A and the concave surface region 34 is small.

  The fixing bolt 18 is a titanium bolt, and penetrates the electrode plate 21A and the energizing plate 30A so that the head 18a is disposed on the electrode plate 21A side. The threaded portion 18b of the fixing bolt 18 is formed with a male screw that mates with the screw hole 26b of the electrode plate 21A and the energization plate through hole 35 of the energization plate 30A.

  Further, the optimum depth dimension of the stepped portion 27 is determined by the wire diameter dimension of the first annular seal 16, but is preferably smaller than the wire diameter dimension of the first annular seal 16. That is, in the state where the first annular seal 16 is disposed on the stepped portion 27 and the first annular seal 16 is not elastically deformed, the first annular seal 16 disposed on the stepped portion 27 is formed on the convex surface region 25A. It is preferable that the surface protrudes from the surface.

  Further, the metal oxide coated on the other surfaces of the base plates of the electrode plate 21A and the current-carrying plate 30A excluding the convex surface region 25A and the concave surface region 34 is not limited to iridium oxide, but oxidation of a platinum group metal typified by iridium. If it is a thing.

  Next, a method for fixing the electrode plate 21A and the energizing plate 30A will be described. First, as shown in FIG. 4A, the first annular seal 16 is disposed along the first stepped portion 27. At this time, since the depth dimension of the first stepped portion 27 is larger than the wire diameter dimension of the first annular seal 16, the first annular seal 16 protrudes from the surface of the convex region 25A. Then, the electrode plate 21A is arranged with respect to the energizing plate 30A so that the convex portion 24A is arranged inside the concave portion 33 while the convex surface region 25A and the concave surface region 34 are opposed to each other. At this time, since the electrode plate through hole 26 and the energizing plate through hole 35 are arranged concentrically, the fixing bolt 18 can be passed through the through holes 26 and 35. Then, the fixing bolt 18 is penetrated from the head hole 26a formed in the electrode plate 21A toward the energizing plate through hole 35 formed in the energizing plate 30A.

  The electrode plate 21A and the energizing plate 30A are fixed by tightening the fixing bolt 18 and the nut 19 as shown in FIG. 4B. At this time, the first annular seal 16 is disposed between the electrode plate 21 </ b> A and the energizing plate 30 </ b> A so that the convex surface region 25 </ b> A and the concave surface region 34 are located on the inner diameter side of the first annular seal 16. Further, since the head 18a of the fixing bolt 18 is disposed in the head hole 26a formed in the electrode plate 21A, the head 18a of the fixing bolt 18 does not protrude from the other surface 23 of the electrode plate 21A.

  When the fixing bolt 18 and the nut 19 are tightened, the first annular seal 16 starts elastic deformation. Further tightening increases the amount of elastic deformation of the first annular seal 16, and the convex region 25 </ b> A and the concave region 34 come into contact with each other on the radially inner side (closed region) of the seal 16. At this time, it is preferable that the first annular seal 16 be disposed along the outer periphery of the concave region 34 (that is, the outer diameter of the convex portion 24A and the outer diameter of the concave portion 33 are substantially the same). .

  As described above, in the insoluble electrode 20A of the first embodiment, the convex surface region 25A and the concave surface region 34 are covered with the platinum 15. Then, while deforming the first elastic body 16, the electrode plate 21 </ b> A and the current-carrying plate 30 </ b> A are fixed so that the convex surface region 25 </ b> A and the concave surface region 34 are in contact with each other in the closed region of the first elastic body. ing. Accordingly, it is possible to prevent the plating solution from entering the closed region of the first elastic body 16, so that the energizing effect between the electrode plate 21A and the energizing plate 30A is maintained, and the convex region 25A and the concave region 34 It is possible to prevent corrosion of the contact surface. As a result, the lifetime of the platinum 15 covered on the convex surface region 25A and the concave surface region 34 can be extended, which is advantageous in terms of cost.

  Further, the insoluble electrode 20A includes a fixing bolt 18 that penetrates the electrode plate 21A and the power supply plate 30A in a closed region of the first elastic body. The fixing bolt 18 elastically deforms the first elastic body 16 and fixes the electrode plate 21A and the current-carrying plate 30A while bringing the convex surface region 25A and the concave surface region 34 into contact with each other. Therefore, with a simple configuration, it is possible to prevent corrosion of the contact surface between the convex surface region 25A and the concave surface region 34 while maintaining the current-carrying effect between the electrode plate 21A and the current-carrying plate 30A. In addition, since the fixing bolt 18 fixes the electrode plate 21A and the current-carrying plate 30A at substantially the center of the closed region of the first annular seal 16, the convex region 25A and the concave region 34 are substantially uniform. Can be contacted. As a result, it seems that a larger energization effect can be exhibited.

(Second Embodiment)
FIG. 5A is a view of the insoluble electrode 20B before fixing the electrode plate 21B and the current-carrying plate 30B, and FIG. 5B is a view of the insoluble electrode 20B after fixing the electrode plate 21B and the current-carrying plate 30B. FIG. An insoluble electrode 20B illustrated in FIG. 5 includes an electrode plate 21B in addition to the configuration of the electrode plate 21A illustrated in FIG. 4, a second step portion 28, a second annular seal (second seal member) 17, and Is further provided. This is to prevent the plating solution that has entered the gap between the electrode plate through hole 26 and the fixing bolt 18 from entering the contact surface between the convex region 25 </ b> B and the concave region 34. It is considered that the plating solution is unlikely to enter the gap between the electrode plate through hole 26 and the fixing bolt 18 due to the surface sealing effect between the electrode plate through hole 26 and the fixing bolt 18. However, if the plating solution enters the gap between the electrode plate through hole 26 and the fixing bolt 18, the platinum 15 covered with the convex region 25 </ b> B and the concave region 34 may be peeled off. This is to prevent this. Note that the plating solution may enter the gap between the current-carrying plate through hole 35 and the fixing bolt 18, but even in this case, the plating solution enters the contact surface between the convex region 25 </ b> B and the concave region 34. Can be prevented.

  The second stepped portion 28 is formed by being cut out over the entire circumference along the peripheral edge of the screw hole 26b formed in the convex surface region 25B. The step portion 27 has substantially the same dimensions. A second annular seal 17 having a wire diameter substantially the same as the wire diameter of the first annular seal 16 is disposed at the second step portion 28. Similar to the first annular seal 16, the second annular seal 17 is formed of a fluoro rubber having an acid resistance and elasticity while forming a region closed inside the diameter.

  The optimum depth dimension of the second step portion 28 and the wire diameter of the second annular seal 17 are not limited to this, and the second step portion 28 can contact the contact surface between the convex surface region 25B and the concave surface region 34. As long as the intrusion of the plating solution can be prevented, a configuration that focuses on preventing the intrusion of the plating solution from the first stepped portion 27 may be adopted.

  As for the method of fixing the electrode plate 21B and the current supply plate 30B, as in the method of fixing the electrode plate 21A and the current supply plate 30A shown in FIG. 4, the current supply plate is formed from the head hole 26a formed in the electrode plate 21B. The fixing bolt 18 is penetrated toward the energizing plate through hole 35 formed in 30B. Note that, similarly to the case where the first annular seal 16 is disposed in the first step portion 27, the second annular seal 17 protrudes from the surface of the convex region 25B.

  Further, when the fixing bolt 18 and the nut 19 are tightened, both the first annular seal 16 and the second annular seal 17 start elastic deformation. Further tightening increases the amount of elastic deformation of the annular seals 16 and 17. A convex region 25B and a concave surface are formed on the inner side of the first annular seal 16 and the outer side of the second annular seal 17 (that is, the region closed by the first annular seal 16 and the second annular seal 17). The region 34 comes into contact.

  In the insoluble electrode 20B of the second embodiment, as in the first embodiment, the contact surface between the convex region 25B and the concave region 34 is maintained while maintaining the energization effect between the electrode plate 21B and the current plate 30B. It is possible to prevent corrosion and to exert a larger energization effect with a simple configuration.

  In addition, since the second elastic body 17 is disposed in the closed region of the first elastic body 16, the first elastic body passes through the electrode plate through hole 26 or the current plate through hole 35. It is possible to prevent the plating solution from entering a region closed by 16 and the second elastic body 17.

(Third embodiment)
6A is a diagram of the insoluble electrode 20C before fixing the electrode plate 21C and the current-carrying plate 30C, and FIG. 6B is a view of the insoluble electrode 20C after fixing the electrode plate 21C and the current-carrying plate 30C. FIG. The configuration of the electrode plate 21C constituting the insoluble electrode 20C shown in FIG. 6 is the same as that of the insoluble electrode 20B shown in FIG. 5, but here, for convenience, different reference numerals are given. Further, the energization plate 30C illustrated in FIG. 5 has a configuration different from the energization plates 30A and 30B illustrated in FIGS.

  Unlike the energizing plates 30A and 30B, the energizing plate 30C illustrated in FIG. 6 does not have the energizing plate through hole 35, and instead has an energizing plate bolt hole 36 that does not penetrate the energizing plate 30C. Yes. The bolt hole 36 is formed in the central portion of the concave area 34 in the thickness direction of the energizing plate 30 </ b> C, and a female screw that is screwed with the male screw of the fixing bolt 18 is formed.

  The electrode plate 21C and the current supply plate 30C in the insoluble electrode 20C are fixed by inserting the fixing bolt 18 from the head hole 26a toward the current supply plate bolt hole 36. Unlike the method illustrated in FIGS. 4 and 5, the nut 19 is not used. In other words, the male screw formed on the fixing bolt 18 and the female screw formed on the energizing plate bolt hole 36 are combined, and the fixing bolt 18 is tightened against the energizing plate 30C. The first annular seal 16 and the second annular seal 17 protrude from the surface of the convex region 25C.

  Further, when the fixing bolt 18 is tightened with respect to the energizing plate 30C, both the first annular seal 16 and the second annular seal 17 start to be elastically deformed similarly to the insoluble electrode 20B illustrated in FIG. Further tightening increases the amount of elastic deformation of the annular seals 16 and 17. A convex region 25C and a concave surface are formed on the inner side of the first annular seal 16 and the outer side of the second annular seal 17 (that is, the region closed by the first annular seal 16 and the second annular seal 17). The region 34 comes into contact.

  The insoluble electrode 20C of the third embodiment can provide the same effects as those of the first and second embodiments. That is, while maintaining the current-carrying effect between the electrode plate 21C and the current-carrying plate 30C, it is possible to prevent corrosion of the contact surface between the convex surface region 25C and the concave surface region 34, and to exert a larger current-carrying effect with a simple configuration. Seems to be able to. Further, it is possible to prevent the plating solution from entering the closed region of the first elastic body 16 through the electrode plate through hole 26. Further, since the energizing plate 30C does not penetrate, the plating solution does not enter the closed region of the first elastic body 16 through the energizing plate bolt hole 36.

(Fourth embodiment)
FIG. 7A is a view of the insoluble electrode 20D before fixing the electrode plate 21D and the current-carrying plate 30D, and FIG. 7B is a view of the insoluble electrode 20D after fixing the electrode plate 21D and the current-carrying plate 30D. FIG. The configuration of the electrode plate 21D and the current plate 30D constituting the insoluble electrode 20D shown in FIG. 7 is as follows in comparison with the electrode plates 21A to 21C and current plates 30A to 30C shown in FIGS. It is different in point.

  An electrode plate through hole 26 penetrating through the electrode plate 21D is formed at substantially the center of the convex surface region 25D of the electrode plate 21D, similarly to the electrode plates 21A to 21C illustrated in FIGS. A first stepped portion 27 is formed over the entire outer periphery of the convex surface region 25 </ b> D, and the first annular seal 16 is disposed on the stepped portion 27. Note that the second step portion 28 is not formed. Therefore, the second annular seal 17 is not arranged.

  A seal mounting groove 37 is formed along the circumferential direction on the side wall of the head hole 26 a of the electrode plate through hole 26. A third annular seal (third seal member) 38 is disposed in the seal mounting groove 37. Similar to the first and second annular seals 16 and 17, the third annular seal 38 is made of a fluoro rubber having an outer peripheral portion of the seal 38 that is continuous and has acid resistance and elasticity. Become. When the third annular seal 38 is disposed in the seal mounting groove 37, the third annular seal 38 protrudes from the side surface of the head hole 26a.

  An energization plate through-hole 35 penetrating the energization plate 21D is formed at substantially the center of the concave surface region 34 of the energization plate 30D, as with the energization plates 30A and 30B shown in FIGS. A seal mounting groove 39 is formed in the side wall of the current-carrying plate through hole 35 along the circumferential direction. A fourth annular seal (fourth seal member) 40 is disposed in the seal mounting groove 39. As with the first to third annular seals 16, 17, and 38, the fourth annular seal 40 is a fluorine that has a continuous continuity at the outer periphery of the seal 40 and has acid resistance and elasticity. Made of rubber. When the fourth annular seal 40 is disposed in the seal mounting groove 39, the fourth annular seal 40 protrudes from the side surface of the energizing plate through hole 35.

  The fixing method of the electrode plate 21D and the current plate 30D is the same as the method of fixing the electrode plates 21A to 21C and the current plates 30A to 30C shown in FIGS. 4 to 6 to the head formed on the electrode plate 21D. The fixing bolt 18 is penetrated from the part hole 26a toward the energizing plate through hole 35 formed in the energizing plate 30D. The first annular seal 16 protrudes from the surface of the convex region 25D.

  When the head 18 a of the fixing bolt 18 is disposed in the head hole 26 a, the third annular seal 38 is elastically deformed between the seal mounting groove 37 and the head 18 a of the fixing bolt 18. Further, when the threaded portion 18 b of the fixing bolt 18 is disposed in the energizing plate through hole 35, the fourth annular seal 40 is elastically deformed between the seal mounting groove 39 and the threaded portion 18 b of the fixing bolt 18. Accordingly, the third annular seal 38 is in close contact with the side wall of the head portion 18a of the fixing bolt 18, and the fourth annular seal 40 is in close contact with the outer peripheral surface of the threaded portion 18b of the fixing bolt 18 over the entire periphery. Demonstrate.

  When the fixing bolt 18 is passed through the electrode plate 21D and the current supply plate 30D, and then the fixing bolt 18 and the nut 19 are tightened, the first annular seal 16 is elastically deformed similarly to the insoluble electrode 20A shown in FIG. At the same time, the convex surface area 25 </ b> D and the concave surface area 34 come into contact with each other inside the diameter of the seal 16. The first annular seal 16 is preferably arranged along the outer periphery of the concave area 34.

  Note that the same effects as those of the first to third embodiments can be obtained in the insoluble electrode 20D of the fourth embodiment. That is, while maintaining the current-carrying effect between the electrode plate 21D and the current-carrying plate 30D, corrosion of the contact surface between the convex surface region 25D and the concave surface region 34 can be prevented, and a greater current-carrying effect can be achieved with a simple configuration. Seems to be able to. Further, it is possible to prevent the plating solution from entering the closed region of the first elastic body 16 through the electrode plate through hole 26 or the current plate through hole 35.

(Fifth embodiment)
FIG. 8 is a view of the insoluble electrode 20E after the electrode plate 21E and the energizing plate 30E are fixed. 8, the configuration of the electrode plate 21E is the same as the configuration of the electrode plate 21D shown in FIG. 7, and the configuration of the energization plate 30E is the same as the configuration of the energization plate 30C shown in FIG. For convenience, different reference numerals are given. Accordingly, the first step portion 27 is formed along the outer peripheral portion of the convex surface region 25 </ b> E, and the first annular seal 16 is disposed on the step portion 27. A seal mounting groove 37 is formed along the circumferential direction on the side wall of the head hole 26a, and a third annular seal 38 is disposed in the seal mounting groove 37. The first and third annular seals 16 and 38 are made of fluororubber having acid resistance and elasticity while the outer peripheral portions of the seals 16 and 38 have a continuous continuity. Further, the first annular seal 16 protrudes from the surface of the convex region 25E, and the third annular seal 38 protrudes from the side surface of the head hole 26a.

  In this insoluble electrode 20E, the fixing method of the electrode plate 21E and the current supply plate 30E is the same as that of the insoluble electrode 20C shown in FIG. That is, without using the nut 19, the male screw formed on the fixing bolt 18 and the female screw formed on the energizing plate bolt hole 36 are combined, and the fixing bolt 18 is tightened against the energizing plate 30 </ b> E. .

  Further, when the fixing bolt 18 is tightened with respect to the energizing plate 30E, the first annular seal 16 starts elastic deformation like the insoluble electrodes 20A and 20D shown in FIGS. The third annular seal 38 is elastically deformed between the head hole 26 a and the side surface of the head 18 a of the fixing bolt 18 while being in close contact with the side surface of the head 18 a of the fixing bolt 18. Further tightening increases the amount of elastic deformation of the first annular seal 16, and the convex region 25 </ b> E and the concave region 34 come into contact with each other on the inner diameter side of the first annular seal 16.

  In addition, the insoluble electrode 20E of the fifth embodiment can provide the same effects as those of the first to third embodiments. That is, while maintaining the current-carrying effect between the electrode plate 21E and the current-carrying plate 30E, corrosion of the contact surface between the convex surface region 25E and the concave surface region 34 can be prevented, and a larger current-carrying effect can be achieved with a simple configuration. Seems to be able to. Further, it is possible to prevent the plating solution from entering the closed region of the first elastic body 16 through the electrode plate through hole 26. Further, since the energizing plate 30E does not penetrate, the plating solution does not enter the closed region of the first elastic body 16 through the energizing plate bolt hole 36.

(Sixth embodiment)
FIG. 9 is a view before fixing the electrode plate 21F and the current supply plate 30F, and FIG. 9B is a view after fixing the electrode plate 21F and the current supply plate 30F. In FIG. 9, the electrode plate 21 </ b> F is formed with an electrode plate bolt hole 41 that does not penetrate the electrode plate 21 </ b> F instead of the electrode plate through hole 26. The bolt hole 41 is formed in the thickness direction of the electrode plate 21 </ b> F at a substantially central portion of the convex surface area 25 </ b> F, and is formed with a female screw that meshes with the male screw of the fixing bolt 18.

  The energization plate 30 </ b> F has an energization plate through-hole 42 formed at substantially the center of the concave surface region 34. The energization plate through-hole 42 has a head hole 42 a in which the head 18 a of the fixing bolt 18 is disposed, and a screw hole 42 b in which a female screw that mates with the male screw of the fixing bolt 18 is formed. . The head hole 42a is formed on the other surface 32 side of the energizing plate 30F, and the screw hole 42b is formed on the one surface 31 side (that is, the concave surface region 34 side) of the energizing plate 30F.

  Further, a first step portion 27 is formed over the entire outer peripheral portion of the convex surface region 25F, and the first annular seal 16 is disposed in the same manner as the insoluble electrodes 20A to 20E shown in FIGS. Has been.

  The insoluble electrode 20F is fixed to the electrode plate 21F and the energizing plate 30F by inserting the fixing bolt 18 from the head hole 42a toward the electrode plate bolt hole 41. Therefore, without using the nut 19, the male screw formed on the fixing bolt 18 and the female screw formed on the electrode plate bolt hole 41 are combined, and the fixing bolt 18 is fastened to the electrode plate 21F. . The first annular seal 16 protrudes from the surface of the convex region 25F.

  Further, when the fixing bolt 18 is tightened with respect to the energizing plate 30F, the first annular seal 16 starts to be elastically deformed similarly to the insoluble electrodes 20A to 20E shown in FIGS. Further tightening increases the amount of elastic deformation of the first annular seal 16, and the convex region 25 </ b> F and the concave region 34 come into contact with each other on the inner diameter side of the first annular seal 16.

  A seal mounting groove may be formed in the circumferential direction along at least one side wall of the head hole 42a and the screw hole 42b, and an annular seal may be disposed in the seal mounting groove. Thus, even when the insoluble electrode 20F is used in such a manner that the plating solution can enter the closed region of the first annular seal 16 from the electrode plate bolt hole 41, the first annular It is possible to prevent the plating solution from entering the closed region of the seal 16.

  Here, also in the insoluble electrode 20F of the sixth embodiment, it is possible to prevent corrosion of the contact surface between the convex surface region 25F and the concave surface region 34 while maintaining the energization effect between the electrode plate 21F and the power supply plate 30F. At the same time, it seems that a larger energization effect can be exhibited with a simple configuration. Moreover, since the electrode plate 21F does not penetrate, the plating solution does not enter the closed region of the first elastic body 16 through the electrode plate bolt hole 41.

(Example of how to use insoluble electrodes)
Next, an example of how to use the insoluble electrode 20 according to the present embodiment will be described. 4 to 9 will be described using FIG. 5 as a representative diagram. When the convex surface area 25B or the concave surface area 34 is corroded, the contact area between the convex surface area 25B and the concave surface area 34 is reduced, and the platinum 15 coated on the surface is peeled off. appear. Therefore, it is necessary to repair the convex surface area 25B or the concave surface area 34. Therefore, by implementing the method of using the insoluble electrode 20 according to the present invention, it is possible to reduce the occurrence of trouble again and extend the life of the insoluble electrode 20B.

  When carrying out the method of using the insoluble electrode 20, first, it is necessary to cover the surfaces of the convex region 25 </ b> B and the concave region 34 with platinum 15. Since the contact area needs to be increased in order to cover the platinum 15 in this manner, first, the convex surface region 25B and the concave surface region 34 are finished to a flat surface with high finishing accuracy. Specifically, the surface roughness is finished to a finishing accuracy of about 1.6 s. If the step portions 27 and 28 are corroded, the build-up repair of the step portions 27 and 28 is performed. When the insoluble electrode 20B is newly manufactured, a process for forming the step portions 27 and 28 is required instead of repairing the build-up of the step portions 27 and 28.

  After finishing the convex surface area 25B and the concave surface area 34, the surface of the convex surface area 25B and the concave surface area 34 is covered with platinum 15. Note that platinum of 100% purity is not necessarily required, and platinum to which an additive is added, that is, a metal containing platinum, may be used as long as an energization effect is exhibited.

  Next, as illustrated in FIG. 5A, the first annular seal 16 and the second annular seal 17 are disposed on the stepped portions 27 and 28. And the convex part 24B of the electrode plate 21B is arrange | positioned in the recessed part 33 of the electricity supply board 30B. Then, since the electrode plate through hole 26 formed in the electrode plate 21B and the current plate through hole 35 formed in the current plate 30B are arranged concentrically, the fixing bolt 18 is passed through the through holes 26 and 35. . After the fixing bolt 18 is passed through the electrode plate through hole 26, the fixing bolt 18 is passed through the energizing plate through hole 35 so that the convex surface region 25B of the electrode plate 21B and the concave surface region 34 of the energizing plate 30B are brought into contact with each other. You may make it make it. Then, the fixing bolt 18 is passed through the through holes 26 and 35 and tightened with the nut 19. At this time, the annular seals 16 and 17 are elastically deformed, and the electrode plate 21B and the current-carrying plate 30B are fixed so that the convex region 25B and the concave region 34 are in surface contact. For example, if the diameter of the annular seals 16 and 17 is approximately 3 mm, the depth of the stepped portions 27 and 28 is 2.5 mm, and the size of the fixing bolt 18 is M8, a tightening torque of 1,960 Nf is preferable. . By carrying out like this, it seems that the annular seals 16 and 17 can be elastically deformed, and the convex region 25B and the concave region 34 can be brought into surface contact. Therefore, the annular seals 16 and 17 are plated between the surface regions 25B and 34 while bringing the current-carrying effect by bringing the surface regions 25B and 34 coated with platinum or a metal containing platinum into contact with each other. Prevent ingress of liquid 4. Therefore, corrosion of the convex surface region 25B or the concave surface region 34 and peeling of the platinum 15 can be suppressed.

  Thus, by elastically deforming the first annular seal 16, it is possible to prevent the plating solution from entering the inside of the diameter of the first annular seal 16. Further, since the convex surface area 25B and the concave surface area 34 are in contact with each other, the current supplied to the energizing plate 30B can easily flow to the electrode plate 21B, and the energizing effect by the platinum 15 coated on the contact surfaces 2225B and 34 can be maintained. it can. Moreover, since the convex surface area 25B and the concave surface area 34 are in contact with each other on the inner diameter side of the first annular seal 16, it is possible to prevent the plating solution from entering the contact surfaces 25B and 34. Therefore, corrosion of the contact surfaces 25B and 34 can be prevented. As a result, it is considered that the frequency of re-coating platinum 15 on these contact surfaces 25B and 34 is reduced, which is advantageous in terms of cost.

  Although the method of using the insoluble electrode 20B has been described with reference to FIG. 5, the insoluble electrodes 20A and 20C to 20F shown in FIGS. 4 and 6 to 9 are not significantly different. That is, after the convex areas 25A and 25C to 25F and the concave area 34 are finished to a flat surface with high finishing accuracy, these surfaces are covered with platinum 15. The annular seal 16 (17) is elastically deformed, and the electrode plates 21A, 21C to 21F and the current plates 30A, 30C to 30F are arranged so that the convex surface regions 25A and 25C to 25F and the concave surface region 34 are in surface contact. Fix it.

  Here, the preferable size of the annular seals 16 and 17 and the fixing bolt 18 will be described. From the viewpoint of elastically deforming the annular seals 16 and 17 and bringing the convex regions 25A to 25F and the concave region 34 into surface contact, the wire diameter of the annular seals 16 and 17 is preferably in the range of 1 mm to 7 mm, more preferably 2 mm. ~ 4mm. Here, the depth dimension of the stepped portions 27 and 28 is 2.5 mm when the wire diameter of the annular seals 16 and 17 is 2.95 mm or 3.00 mm, and the wire diameter of the annular seals 16 and 17 is 2.00 mm. If it is 1.65 mm, and the wire diameter of the annular seals 16 and 17 is 4.00 mm, 3.50 mm is preferable. The size of the fixing bolt 18 is preferably in the range of M8 to M16 from the viewpoint of securing the contact area between the convex surface regions 25A to 25F and the concave surface region 34. It is determined by the current. That is, in order to secure the current flow from the current plates 30A to 30F to the electrode plates 21A to 21F, the annular seals 16 and 17 are elastically deformed while securing the contact area between the convex regions 25A to 25F and the concave region 34. The bolt size that can fix the electrode plates 21A to 21F and the energizing plate 30 should be determined. The tightening torque of the fixing bolt 18 is 1,470 to 2,450 Nf (preferably about 1,960 Nf) for M8 bolts, and 3,430 to 4,410 Nf (preferably 3 for M10 bolts). , 920 Nf), 4,900-7,840 Nf (preferably about 4,900 Nf) for M12 bolts, 8,820-11,760 Nf (preferably about 8,820 Nf) for M16 bolts. . By carrying out like this, it is thought that the annular seals 16 and 17 can be elastically deformed, and the convex areas 25A to 25F and the concave area 34 can be brought into surface contact.

  In addition, although this invention is described in said preferable embodiment, this invention is not restrict | limited only to it. It will be understood that various other embodiments may be made without departing from the spirit and scope of the invention.

  For example, in the above-described first to sixth embodiments, the convex portions 24A to 24F are formed on the one surface 22 side of the electrode plates 21A to 21F, and the concave portion 33 is formed on the one surface 31 side of the energizing plates 30A to 30F. However, the present invention is not limited to this, and a concave portion may be formed on the one surface 22 side of the electrode plates 21A to 21F, and a convex portion may be formed on the one surface 31 side of the energizing plates 30A to 30F.

  In the first to sixth embodiments described above, the bases of the electrode plates 21A to 21F and the bases of the energization plates 30A to 30F are titanium, but are not limited to this, and are valve metals or valve metal base alloys. May be. The valve metal refers to a metal such as titanium, aluminum, tantalum, niobium, and zirconium that has a passive film formed on the surface, excellent corrosion resistance, and high breakdown voltage. Further, the platinum 15 coated on the convex surface regions 25A to 25F and the concave surface region 34 is not necessarily limited to platinum having a purity of 100%, and is a platinum-based metal containing an additive as long as the effect of improving the electrical conductivity is exhibited. Also good.

  Moreover, in 1st-6th embodiment, when the 1st annular seal 16 is arrange | positioned at the 1st level | step-difference part 27, it comprises so that the 1st annular seal 16 may protrude from the surface of convex surface area | region 25A-25F. However, it is not limited to this. For example, you may comprise so that the 1st cyclic | annular seal | sticker 16 may protrude from the outer peripheral side surface of convex part 24A-24F formed in electrode plate 21A-21F.

  In the first to sixth embodiments, the cutout portion in which the first annular seal 16 is disposed may be a groove instead of the first stepped portion 27. In such a case, the convex regions 25A to 25F are formed radially inward from the outer peripheral portion. Similarly, the second stepped portion 28 may be a groove formed radially outward from the inner peripheral portion of the convex surface regions 25A to 25F.

  In the first to sixth embodiments, the first annular seal 16 is made of fluororubber having acid resistance and elasticity, but is not limited thereto. Although the heat-resistant temperature varies depending on the use environment when used in the electroplating facility 1, any heat resistance temperature may be used as long as it does not deteriorate in a plating solution (acid solution) at 60 to 100 ° C. Therefore, ethylene propylene rubber or butyl rubber may be used instead of fluoro rubber. Further, although the life of the first annular seal 16 is somewhat shortened, it is possible to use even nitrile rubber or silicon rubber. Furthermore, it is not always necessary to use rubber, and may be, for example, fluorine-based resin. That is, any material that has acid resistance and elasticity, exhibits a sealing effect when elastically deformed, and can be used in a plating solution at 60 to 100 ° C. may be used.

  In the first to sixth embodiments, the first annular seal 16 is disposed along the outer peripheral portion so as to surround all of the convex regions 25A to 25F and the concave region 34. Not limited to. That is, the first annular shape surrounds a part of the concave area 34 and a part of the convex areas 25A to 25F as long as the energizing effect from the current plates 30A to 30F to the electrode plates 21A to 21F can be exhibited. A seal 16 may be disposed. Further, the first annular seal 16 may be positioned so as to include not only the convex regions 25A to 25F and the concave region 34 but also other surfaces.

  Further, in the first to sixth embodiments, the first step portion 27 is formed along the outer peripheral portion of the convex regions 25A to 25F, but the first step portion 27 is not necessarily an essential configuration. . For example, the first annular seal 16 may be externally fitted to the convex portions 24A to 24F without forming the first step portion 27.

  Moreover, when arrange | positioning the 2nd annular seal 17 like the 2nd-6th embodiment, the 2nd level | step-difference part 28 does not necessarily need to be formed in convex part 24A-24F. For example, the second annular seal 17 may be disposed without forming the stepped portion 28 as long as the convex surface regions 25A to 25F and the concave surface region 34 can be brought into surface contact with each other. Also good.

  Further, in the first to sixth embodiments, the annular seal 16 (17) prevents the plating solution from entering the contact surface between the convex regions 25A to 25F and the concave region 34. However, the present invention is not limited to this. Absent. For example, an elastic body in which the closed region is formed in a square shape may be used. That is, any elastic body having at least one closed region may be used.

  In the first to sixth embodiments, the first step portion 27 is provided along the outer peripheral portion of the convex regions 25A to 25F, and the first annular seal 16 is attached to the step portion 27. Not limited to this. For example, an annular groove may be formed inside the outer peripheral portion of the convex areas 25A to 25F, and an annular seal may be attached to the groove. At this time, it is preferable that the platinum 15 is coated on the inner diameter side than the position where the annular seal is disposed.

  Moreover, in 1st-6th embodiment, it replaces with forming the 1st level | step-difference part 27 in convex surface area | region 25A-25F, and arrange | positioning the 1st cyclic | annular seal | sticker 16 in this level | step-difference part 27. An annular groove may be formed in the concave area 34 of 30A to 30F, and an annular seal may be attached to the groove. Further, as long as the first annular seal 16 can be elastically deformed to bring the convex surface regions 25A to 25F into contact with the concave surface region 34, it is not always necessary to form a stepped portion or an annular groove. Moreover, you may arrange | position an annular seal between the outer peripheral side surface of convex part 24A-24F and the inner peripheral side surface of the recessed part 33. FIG.

  In the first to sixth embodiments, the cross-sectional shape that horizontally crosses the protruding direction of the convex portions 24A to 24F and the cross-sectional shape that horizontally crosses the depth direction of the concave portion 33 do not necessarily need to be a perfect circle. It may be an ellipse or a polygon. In addition, the cross-sectional area that horizontally crosses the protruding direction of the convex portions 24A to 24F may be different depending on the crossing site as long as the plating solution can be prevented from entering the closed region of the first annular seal 16. . Similarly, the cross-sectional area that horizontally crosses the depth direction of the recess 33 may be different depending on the crossing part. That is, the convex portions 24A to 24F can be disposed inside the concave portion 33, the convex surface regions 25A to 25F and the concave surface region 34 can be brought into surface contact, and the convex surface regions 25A to 25F and the concave surface region 34 can be brought into surface contact. It is only necessary to prevent the plating solution from entering the contact surface.

  In the first to sixth embodiments, the fixing bolt 18 penetrates the electrode plates 21A to 21F and the current passing plates 30A to 30F at substantially the center of the convex surface regions 25A to 25F and the concave surface region 34. At this time, the fixing bolt 18 is disposed inside the first annular seal 16. In this state, as shown in FIG. 4B, the fixing bolt 18 is passed through the through holes 26 and 35 to fix the electrode plates 21A to 21F and the current plates 30A to 30F. Then, since the first annular seal 16 can be elastically deformed almost uniformly over the entire surface, it seems that the convex regions 25A to 25F and the concave region 34 can be brought into surface contact without deviation. Therefore, it is possible to prevent the plating solution 4 from entering between the convex surface regions 25A to 25F and the concave surface region 34 while maximizing the contact area between the convex surface regions 25A to 25F and the concave surface region 34.

  Further, in the first to sixth embodiments, the convex surface regions 25A to 25F and the concave surface region 34 have a circular shape with substantially the same area, and the outer periphery of the concave and convex surface regions 25A to 25F. A seal 16 is preferably arranged. By doing so, all of the convex areas 25A to 25F and the concave area 34 covered with the platinum 15 are not exposed to the plating solution 4 while maximizing the contact area between the convex areas 25A to 25F and the concave area 34. . Therefore, it is considered that corrosion of the contact portions of the current plates 30A to 30F or the electrode plates 21A to 21F that are in contact with each other can be more reliably prevented while exerting the power supply effect from the current plates 30A to 30F to the electrode plates 21A to 21F. It is done.

It is the schematic of the electroplating installation which electroplates zinc etc. on the surface of a steel plate. It is the figure which looked at the insoluble electrode from the strip side illustrated by FIG. FIG. 3 is a cross-sectional view taken along line AA illustrated in FIG. 2. FIG. 4 is a detailed view of part B shown in FIG. 3, according to the first embodiment. FIG. 4 is a detailed view of a portion B illustrated in FIG. 3, according to the second embodiment. FIG. 4 is a detailed view of a portion B illustrated in FIG. 3, according to a third embodiment. FIG. 4 is a detailed view of a part B illustrated in FIG. 3, according to a fourth embodiment. FIG. 10 is a detailed view of a portion B illustrated in FIG. 3, according to the fifth embodiment. FIG. 10 is a detailed view of a portion B illustrated in FIG. 3, according to the sixth embodiment.

Explanation of symbols

4 Plating solution (acid solution)
15 Platinum 16 First annular seal (first seal member)
17 Second annular seal (second seal member)
18 fixing bolt 20 insoluble electrode 20A-20F insoluble electrode 21 in each embodiment electrode plate 21A-21F electrode plate 25 in each embodiment convex surface region (first surface region)
25A-25F Convex surface area 26 in each embodiment Electrode plate through-hole 27 First step part (notch part)
30 energizing plates 30A-30F energizing plate 34 in each embodiment Concave surface area (second surface area)
35 Current-carrying plate through-hole 38 Third annular seal (third seal member)
40 Fourth annular seal (fourth seal member)
42 Current-carrying plate through hole

Claims (6)

An insoluble electrode immersed in an acidic solution and energized,
An electrode plate having a first surface region coated with platinum or a metal containing platinum on the surface of the substrate;
A current plate having a second surface region to which the electrode plate is attached and the surface of the substrate is coated with platinum or a metal containing platinum;
A gap between the electrode plate and the energizing plate so that at least a part of the first surface region and at least a part of the second surface region are located in the closed region. A first seal member disposed on
The electrode plate and the current-carrying plate so that the first surface region and the second surface region are in contact with each other in the closed region of the first seal member while deforming the first seal member. And an insoluble electrode characterized by being fixed. A closed region of the first seal member, and a through-hole penetrating at least one of the electrode plate and the energization plate;
The insoluble electrode according to claim 1, further comprising a fixing bolt that is disposed in the through hole and fixes the electrode plate and the current-carrying plate.   The fixing bolt is disposed in the closed region, and is disposed between the electrode plate and the energizing plate and in the closed region of the first seal member. The insoluble electrode according to claim 2, further comprising a second seal member.   A third seal member for preventing an acidic liquid from entering a contact surface between the first surface region and the second surface region is further provided on a side wall of the through hole. Item 3. The insoluble electrode according to Item 2. A method of using an insoluble electrode immersed in an acidic liquid and energized,
By covering the surface of the electrode plate and the surface of the energizing plate to which the electrode plate is attached with platinum or a metal containing platinum, the first surface region and the second surface region are formed,
A seal member having a closed region is disposed on one of the surface of the electrode plate having the first surface region and the surface of the energization plate having the second surface region;
A method of using an insoluble electrode, wherein the electrode plate and the current plate are fixed so that the first surface region and the second surface region are in contact with each other in a closed region of the seal member. . An electrode plate immersed in an acidic solution and energized through an energizing plate,
A surface region in which the surface of the substrate is coated with platinum or a metal containing platinum;
A cutout portion formed in the surface area or at a position surrounding the surface area so that a seal member can be mounted;
An electrode plate characterized in that, when fixed to the energization plate, the sealing member prevents the acidic liquid from entering the surface region and energizes the surface region from the energization plate.

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