JP2811803B2 - Energizing roll device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a current-carrying roll device used for electroplating.

[Prior Art] Electroplating is performed by an electroplating facility as shown in FIG. Here, the zinc electroplating equipment will be described. In the figure, 1 is a steel strip, 2 is an energizing roll, 3 is a backup roll, 4 is a plating tank, 5 is a dam roll, and 6 is an anode. The steel strip 1 is negatively charged by the energizing roll 2, sent to the plating tank 4 via the dam roll 5, and plated with zinc on the steel strip surface by an electrode reaction with the anode surface via the electrolytic solution 7. . The plated steel strip exits one plating tank, is charged by a current-carrying roll, is sent to the next plating tank, and is similarly plated to obtain a required amount of plating, and is cleaned to be a finished product. In this case, the energizing roll 2 has an important role of charging the steel strip as required, and the backup roll 3 assists this. Here, it is necessary that the energizing roll 2 is appropriately in contact with the steel strip 1.

However, when the set pressure of the backup roll 3 is changed to adjust the pressing force, the left and right reduction balance is often lost, resulting in non-uniform reduction. In such a state,
When the energization is continued, the contact resistance between the energizing roll 2 and the steel strip 1 increases, the voltage increases, and a small gap is generated between the energizing roll 2 and the steel strip 1 to generate a spark discharge. As a result, arc flaws are generated around the energizing roll 2, and the life of the energizing roll 2 is deteriorated, or the flaw is printed on the steel strip 1 to deteriorate the plating quality. Therefore, various countermeasures have been taken. As one of the measures,
Japanese Patent Application Laid-Open No. 182997 discloses a method for detecting and adjusting a pressing pressure of an energizing roll. This method detects the grounding current by grounding the circuit between the brush and the negative electrode of the plating power supply and the negative electrode of the plating power supply, and detects the pressing pressure of the conductive roll on the steel strip based on the detected value. In this method, the pressing pressure of the energizing roll against the steel strip is adjusted in order to keep the detected value constant.

[Problem to be Solved by the Invention] The above-described method can be expected to have a certain effect, but has the following problem.

This type of energizing roll is made of metal, and its accompanying equipment is robust and heavy. In order to attach a pressure adjusting device to such a current-carrying roll and to quickly respond to minute gaps that occur instantaneously, large-scale equipment is required, which is not practical.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide an energizing roll device capable of preventing abnormal reduction in pressure with simple equipment.

[Means for Solving the Problems] To achieve the above object, the present invention provides an energizing roll,
An energizing roll device comprising a backup roll having a pressing adjustment mechanism, wherein the pressing adjustment mechanism is a mechanism using a cylinder, and a position detector for detecting displacement of the rod is provided. It is.

[Operation] Since the present invention is configured as described above, when performing electroplating using the apparatus of the present invention, an appropriate displacement range of the rod of the pressing adjustment mechanism by the cylinder is set, and The displacement is detected by the position detector, and when the detected value exceeds an appropriate displacement range, the pressing adjustment mechanism of the cylinder is actuated immediately in response thereto. Therefore, abnormal pressure reduction can be prevented beforehand.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In the figure, 11 is a cylinder, 12 is an arm, and 13 is a position detector. Also 18
Is a cable pipe, and 19 and 20 are air supply / discharge pipes.

The energizing roll device according to the present invention is an energizing roll device comprising an energizing roll 2 and a backup roll 3 having a pressing adjustment mechanism, wherein the pressing adjustment mechanism is a mechanism using a cylinder 11, and a position detection for detecting a displacement of a rod 14 thereof. vessel
13 are provided. An arm 12 having one end fixed to the upper part of the rod 14 of the cylinder 11 and the rod 15 of the position detector 13 fixed to the other end is provided. 16 is a cylinder tube. The rod 15 performs the same displacement as the rod 14 via the arm 12. A commercially available position detector (for example, ABSOCODER NSD) can be used. FIG. 2 is a view showing another embodiment of the present invention. In the energizing roll device of the present invention, the rod 14 of the cylinder 11 of the pressing adjustment mechanism is the same as the rod of the position detector 13, and the position detector 13 is mounted on the upper part of the cylinder tube 16. In this case, no space is required by the position detector 13 and the management is easy.

Next, the operation of the energizing roll device of the present invention will be described with reference to FIG. FIG. 3 is a diagram for explaining the operation of the present invention. The control mechanism 17 sends the position detector 13
Is input. Here, the difference between the detected value on the operation side in the steel strip width direction and the detected value on the opposite side is calculated. When the detected values exceed an appropriate displacement range, the cylinder pressing adjustment mechanism is actuated to respond immediately to the abnormal alarm. In the above embodiment, an air cylinder is used as the cylinder of the pressing adjustment mechanism, but a hydraulic cylinder may be used.

When electrogalvanizing was performed using the energizing roll apparatus of the present invention, the number of energizing roll sparks was negligible compared to the conventional 2-3 cases per month. As a result, stable operation has become possible.

As described above, the energizing roll device of the present invention detects and predicts in advance the non-uniform reduction of the backup roll in advance, performs the pressing adjustment, and can prevent abnormal reduction.

[Effects of the Invention] According to the current-carrying roll device of the present invention, it is possible to detect and predict in advance the uneven roll-down of the backup roll with a simple structure.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of the present invention, FIG. 2 is a diagram showing another embodiment of the present invention, FIG. 3 is a diagram for explaining the operation of the present invention, and FIG. It is explanatory drawing of plating equipment. 11… Cylinder, 12… Arm, 13… Position detector, 17… Control mechanism.

Continued on the front page (72) Inventor Harutomo Yuta 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Shizuka Subuchi 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan stock In-company examiner Michiko Sakai (56) References JP-A-59-182997 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) C25D 21/00-21/12, 7/06

Claims (1)

(57) [Claims] 1. An energizing roll device comprising an energizing roll and a backup roll having a pressing adjustment mechanism, wherein the pressing adjustment mechanism is a mechanism using a cylinder and a position detector for detecting displacement of the rod is provided. Characterized energizing roll device.