JP2010242122A - Device for preventing overcoat at edge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for preventing overcoat at an edge, which eliminates a moving operation of an electrode associated with a change of a width of a steel strip when an edge mask device is installed in an electroplating facility for the steel strip using a soluble electrode. <P>SOLUTION: The device 10 for preventing overcoat at the edge includes: a first electrifying member 15 which sends an electric current to a first soluble electrode 11 arranged in a middle part in the width direction of the steel strip; second electrifying members 16, 17 and 18 which send an electric current to second soluble electrodes 12, 13 and 14 arranged in both ends of the steel strip in the width direction; and an electrification-switching part 20 which switches between electrification and non-electrification to the first and second electrifying members 15-18. The electrification-switching part 20 includes: first and second fixed contact parts 21-24 which constitute one end of the first and second electrifying members 15-18; and a movable contact member 25 which advances/retreats from the first fixed contact part 21 side to the second fixed contact part 24 side and contacts the first and second fixed contact parts 21-24 while sliding. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to an edge overcoat prevention device for preventing edge overcoat generated at an end portion in the width direction of a steel strip in an electroplating process of the steel strip by a soluble electrode method.

As shown in FIG. 5, the vertical electroplating equipment used for the electroplating treatment of the steel strip by the soluble electrode method is a pair of the plating tank 50 filled with the electrolyte and the pair of the plating tank 50 arranged in parallel above the plating tank 50. Conductor rolls 51, 52, a pair of electrodes 54, 55 disposed below the conductor rolls 51, 52 in the plating tank 50, and a sink roll disposed below the electrodes 54, 55 in the plating tank 50, respectively. 53. The steel strip S to be plated is guided from one conductor roll 51 into the plating tank 50, passes between a pair of opposed electrodes 54, is changed in direction by a sink roll 53, and is paired with a pair of opposed electrodes 55. It passes through and is taken out from the other conductor roll 52. In the plating tank 50, a voltage is applied using the electrodes 54 and 55 as anodes and the steel strip S as a cathode, the electrodes 54 and 55 are melted, and the steel strip S is plated.

In the electroplating treatment of the steel strip, a large current (edge current) flows at the end portion in the width direction of the steel strip, so that an edge overcoat is produced in which the end portion of the steel strip is excessively plated. For this reason, an edge mask having a U-shaped or V-shaped groove is disposed at the end of the steel strip, and the end of the steel strip is shielded from the electrodes. For example, in Patent Document 1, an edge mask is suspended and fixed at the center of a guide frame that runs on a pair of guide rails provided on the upper part of a plating tank, and the position of the edge mask can be automatically adjusted. An invention of an edge mask position adjusting device is disclosed.

Japanese Patent Laid-Open No. Sho 62-170497

When an edge mask device is provided in a steel strip electroplating facility using a soluble electrode system, plating on only one side of the steel strip S with a narrow plate width or changing the plating thickness between one side and the other side As shown in FIG. 6, a current 59 flows around the back side of the edge mask 56, and a phenomenon occurs in which the non-conductive current or the small voltage 58 is plated. Therefore, it is necessary to move the electrodes 57 and 58 arranged at both ends in the width direction of the steel strip S to the outside of the energization range as the plate width of the steel strip S changes.

If an edge mask that is long in the width direction of the steel strip is used, current backflow will not occur. However, if the above-mentioned edge mask is applied to existing electroplating equipment, the equipment will be extensively modified and costly. There is. In addition, when an edge mask device is installed in an electroplating facility using a soluble electrode method, the edge mask device must be in the way when inserting and carrying out the soluble electrode, but the edge is long in the width direction of the steel strip. There is also a problem that the electrode replacement operation becomes more difficult by using the mask.

The present invention has been made in view of such circumstances, and when an edge mask device is installed in an electroplating facility for a steel strip by a soluble electrode method, an edge over operation that eliminates the need to move the electrode in accordance with a change in the strip width of the steel strip is required. An object is to provide a coat prevention device.

In order to achieve the above object, the present invention provides an edge overcoat prevention device for preventing edge overcoat generated at an end portion in the width direction of a steel strip in an electroplating treatment of the steel strip by a soluble electrode method. A first energization member for energizing the first soluble electrode disposed in the middle portion in the width direction of the strip, and a second energization for the second soluble electrode disposed at both ends in the width direction of the steel strip An energization member, and an energization switching unit that switches between energization and de-energization of the first and second energization members, the energization switching unit being a first fixed provided on the first energization member A second fixed contact portion provided on the second energization member and adjacent to the first fixed contact portion; The contact part advances and retracts toward the side and slides into contact with the first and second fixed contact parts. It is characterized by having a movable contact member that.

In the present invention, the movable contact member is moved back and forth to bring the movable contact member and the second fixed contact portion into contact or non-contact, thereby energizing the second fixed contact portion through the second energization member. The energization state of the second soluble electrode can be controlled. Accordingly, when plating a steel strip having a narrow plate width, the first contact point is moved backward by the first fixed contact portion so that the movable contact member and the second fixed contact portion are not in contact with each other. If the soluble electrode is in a non-energized state, the reverse of the current can be prevented.

Moreover, in the edge overcoat prevention apparatus which concerns on this invention, said 2nd electricity supply member is arrange | positioned for every said 2nd soluble electrode, and said 2nd stationary contact part provided in each said 2nd electricity supply member However, even if the first fixed contact portion is arranged closer to the first soluble electrode according to the arrangement of the second soluble electrode that is energized through the second fixed contact portion, Good. Thereby, according to the width | variety of a steel strip, it becomes possible to control finely the energization state of the 2nd soluble electrode arrange | positioned at the both ends of the width direction of a steel strip.

In the edge overcoat prevention device according to the present invention, the plate-like first fixed contact portion and the plate-like second fixed contact portion are stacked with an insulating layer interposed therebetween, and the movable contact member is attached to the first contact point. It is good also as a rod-shaped conductor which penetrates the 1st and 2nd fixed contact part. As a result, the mechanism of the energization switching unit is simplified, and cost reduction and reliability can be improved.

In the edge overcoat prevention device according to the present invention, the second soluble electrode disposed at both ends in the width direction of the steel strip is brought into a non-energized state in accordance with the change in the plate width of the steel strip. Since the rotation can be prevented, the electrode moving work is not required when the steel strip width is changed.

It is a perspective view of the edge overcoat prevention apparatus concerning one embodiment of the present invention. It is a perspective view of the edge overcoat prevention apparatus. It is a schematic diagram of an energization switching part. It is a schematic diagram for demonstrating operation | movement of the edge overcoat prevention apparatus which concerns on one embodiment of this invention. It is a schematic diagram of the conventional vertical electroplating equipment. It is a schematic diagram which shows the installation condition of an edge mask.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.

In the present embodiment, a vertical electroplating facility will be described as an example of a facility for performing electroplating treatment of a steel strip by a soluble electrode method. As described in the section “Background Art”, the vertical electroplating facility includes a plating tank 50 filled with an electrolyte, a pair of conductor rolls 51 and 52 arranged in parallel above the plating tank 50, and plating. A pair of electrodes 54 and 55 (soluble electrodes) respectively installed below the conductor rolls 51 and 52 in the tank 50 and a sink roll 53 disposed below the electrodes 54 and 55 in the plating tank 50 are provided. (See FIG. 5).

1 and 2 are perspective views of an edge overcoat prevention device 10 according to an embodiment of the present invention. The edge overcoat prevention device 10 includes a first energizing member 15 that energizes the first soluble electrode 11 arranged in the middle portion in the width direction of the steel strip (not shown), and both end portions in the width direction of the steel strip. Switching between energization and non-energization of the second energizing members 16, 17, 18 energizing the second soluble electrodes 12, 13, 14 arranged respectively and the first and second energizing members 15-18 is performed. And an energization switching unit 20.

The 1st and 2nd soluble electrodes 11-14 are made into the strip | belt board long in a perpendicular direction, and the recessed part 32 hollow in the horizontal direction is formed in the upper part of the back surface of the surface facing a steel strip. A guide rail 31 extending in the width direction of the steel strip is installed on the upper part of the plating tank 50, and the guide rail 31 is fitted into the recessed portions 32 of the first and second soluble electrodes 11 to 14. The first and second soluble electrodes 11 to 14 are suspended by the guide rail 31.
The number of the first soluble electrodes 11 arranged in the middle portion in the width direction of the steel strip is nine, and the second soluble electrode 12 and the first soluble electrode 11 are arranged from the first soluble electrode 11 toward both ends in the width direction of the steel strip. Two soluble electrodes 13 and a second soluble electrode 14 are arranged adjacent to each other in this order.

The first soluble electrode 11 is energized through the first energization member 15, the second soluble electrode 12 is the second energization member 16, the second soluble electrode 13 is the second energization member 17, and the second The soluble electrodes 14 are energized through the second energizing member 18. The 1st and 2nd electricity supply members 15-18 consist of a strip-shaped conductor, and the 1st electricity supply member 15, the 2nd electricity supply member 16, the 2nd electricity supply member 17, the 2nd electricity supply member 18 from the top. And are arranged in the width direction of the steel strip. As shown in FIG. 3, an insulating layer 19 made of an insulator is interposed between the layers. One end portions of the first and second energization members 15 to 18 are bent at a right angle downward, and are used for switching between energization / non-energization and the first and second fixed contact portions 21 to 24. Has been. Moreover, the 1st and 2nd contact parts 27-30 which contact | abut to the 1st and 2nd soluble electrodes 11-14 in the other edge part and intermediate part of the 1st and 2nd electricity supply members 15-18. (The first and second contact portions extend in the order of 30, 29, 28, 27, 27, 28, 29, 30 from the side closer to the second fixed contact portion 24). Out).

The energization switching unit 20 includes first and second fixed contact portions 21 to 24 that constitute one end of the first and second energization members 15 to 18, and the first and second fixed contact portions 21 to 21. And a movable contact member 25 made of a columnar (bar-shaped) conductor that penetrates 24. The first and second fixed contact portions 21 to 24 are arranged in accordance with the arrangement of the first and second soluble electrodes 11 to 14 from the farther from the center of the plate width than the first fixed contact portion 21 and the second fixed contact. The part 22, the second fixed contact part 23, and the second fixed contact part 24 are arranged in this order (see FIG. 3). On the other hand, the movable contact member 25 is slidably supported by the support portion 26, and the first fixed contact portion 21 advances and retracts from the second toward the second by an actuator (not shown). The first and second fixed contact portions 21 to 24 are in sliding contact.

Next, the operation of the edge overcoat prevention device 10 having the above configuration will be described with reference to FIG.
When plating the widest steel strip S <b> 1, the movable contact member 25 is fixed to the second fixed contact portion 21 until the tip of the movable contact member 25 is in sliding contact with the second fixed contact portion 24. The contact portion 24 is advanced toward the side. Thereby, the 1st and 2nd soluble electrodes 11-14 are supplied with electricity via the 1st and 2nd electricity supply members 15-18 from the 1st and 2nd fixed contact parts 21-24.

When plating the steel strip S2 having a narrower width than the steel strip S1, the first fixed contact portion 21 is not known until the tip of the movable contact member 25 is in sliding contact with the second fixed contact portion 23. The second fixed contact portion 24 is advanced toward the side. As a result, only the second fixed contact portion 24 is not in contact with the movable contact member 25, and only the second soluble electrode 14 is in a non-energized state.
Similarly, when plating a steel strip S3 that is narrower than the steel strip S2, the movable contact member 25 is moved to the first fixed contact until the tip of the movable contact member 25 comes into sliding contact with the second fixed contact portion 22. The second fixed contact portion 24 is moved forward from the side 21 toward the side, the second fixed contact portions 23 and 24 are not in contact with the movable contact member 25, and the second soluble electrodes 13 and 14 are in a non-energized state. And

When the steel strip S4 having the narrowest width is plated, the first fixed contact portion 21 is moved from the first fixed contact portion 21 so that the tip end portion of the movable contact member 25 is in sliding contact with only the first fixed contact portion 21. The second fixed contact portion 24 is advanced toward the side, the second fixed contact portions 22, 23, 24 are brought into non-contact with the movable contact member 25, and the second soluble electrodes 12, 13, 14 are brought into a non-energized state. To do.

Although one embodiment of the present invention has been described above, the present invention is not limited to the configuration described in the above-described embodiment, and is within the scope of matters described in the claims. Other possible embodiments and modifications are also included. For example, in the above-described embodiment, the number of the second soluble electrodes at each end is three, but may be one, two, or four or more. Further, the number of first soluble electrodes is not limited to nine, and may be one or two, or more or less than nine. Furthermore, although the vertical electroplating facility has been described in the above embodiment, a horizontal electroplating facility or the like may be used.

10: Edge overcoat prevention device, 11: First soluble electrode, 12, 13, 14: Second soluble electrode, 15: First energizing member, 16, 17, 18: Second energizing member, 19: Insulating layer, 20: energization switching part, 21: first fixed contact part, 22, 23, 24: second fixed contact part, 25: movable contact member, 26: support part, 27: first contact part , 28, 29, 30: second contact portion, 31: guide rail, 32: recessed portion, 51, 52: conductor roll, 53: sink roll, 56: edge mask, S1, S2, S3, S4: steel band

Claims (3)

An edge overcoat prevention device for preventing edge overcoat generated at the end of the steel strip in the width direction in the electroplating treatment of the steel strip by the soluble electrode method,
A first energizing member for energizing a first soluble electrode disposed in an intermediate portion in the width direction of the steel strip, and a second energizing for a second soluble electrode disposed at both ends in the width direction of the steel strip. Two energization members, and an energization switching unit that switches between energization and non-energization of the first and second energization members,
The energization switching unit includes a first fixed contact portion provided on the first energization member and a second fixed contact portion provided on the second energization member and disposed adjacent to the first fixed contact portion. A fixed contact portion, and a movable contact member that slides in contact with the first and second fixed contact portions from the first fixed contact portion to the second fixed contact portion. Edge overcoat prevention device characterized by. 2. The edge overcoat preventing device according to claim 1, wherein the second energizing member is provided for each of the second soluble electrodes, and the second fixed contact portion provided on each of the second energizing members is provided. In accordance with the arrangement of the second soluble electrode that is energized through the second fixed contact portion, the first fixed contact portion is arranged closer to the first soluble electrode. A featured edge overcoat prevention device. In the edge overcoat prevention device according to any one of claims 1 and 2, the plate-like first fixed contact portion and the plate-like second fixed contact portion are laminated with an insulating layer interposed therebetween, The edge overcoat prevention device according to claim 1, wherein the movable contact member is made of a rod-shaped conductor that penetrates the first and second fixed contact portions.

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