JP2000087294A - Conductor roll stand in electroplating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the insulation of a roll stand to be hard to be influenced by the evaporated fume of a plating soln. and to efficiently execute the maintaining control of the insulation by forming at least one among a rolling element, an inner ring and an outer ring of ceramics and equipping a roll stand with it. SOLUTION: A roller bearing 1 beared with a conductor roll 7 is constituted so as to be provided with an outer ring 2, a roller 3 as a rolling element and an inner ring 4, and the outer ring 2 is composed of ceramics (silicon nitride and alumina). Moreover, the one composed of ceramics may be the roller 3 or the inner ring 4 besides the outer ring 2, a ring 5 made of metal and a ring 6 made of ceramics may be fitted in a laminated state to a double structure or a triple structure, or the surface of at least one among the outer ring 2, the roller 3 and the inner ring 4 may be coated with ceramics by thermal spraying or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductor roll stand for an electroplating apparatus, and more particularly to a conductor roll stand used for an electroplating line for processing a steel plate or the like.

[0002]

2. Description of the Related Art In an electroplating line for a steel sheet or the like, an electroplating apparatus including an earth roll, a conductor roll, a plating tank, and an earth roll is provided, and a material to be plated such as a steel sheet is plated through these rolls. In the course of passing through the tank, plating is applied to the surface of the material to be plated between the electrode (anode) in the plating tank and an electrode (anode) in the plating tank by applying electricity from a conductor roll.

As shown in FIG. 2, a conductor roll used in the above-mentioned electroplating apparatus has a roller bearing 9 mounted on the left and right shaft portions 8 of a conductor roll 7 and a bearing box 10 outside the roller bearing 9. For example, as shown in FIG. 3, it is used as a conductor roll stand 13 of an electroplating apparatus by being mounted on a dropping portion 12 of a roll stand 11.
The conductor roll stand 13 is usually mounted on a gantry 14 provided on the entrance side of the plating tank.

In FIG. 2, reference numeral 10a denotes an oil seal, reference numeral 15 denotes a liquid drain flange, reference numeral 16 denotes a power transmission sprocket, reference numeral 17 denotes a power supply portion, and reference numeral 18 denotes a connection portion of a cooling water pipe. In FIG. 3, reference numeral 19 denotes a backup roll coated with a surface rubber, and reference numeral 20 denotes a pair of dam rolls coated with a surface rubber. Is attached to the roll stand 11. The backup roll 19 is moved up and down by the cylinder 23 to press the material to be plated S against the conductor roll 7. Further, the dam roll 20 is used for draining the liquid, and may not be provided depending on the structure of the electroplating apparatus.

[0005] In the conductor roll stand 13 of the electroplating apparatus, the conductor roll 7 is energized during electroplating, and therefore needs to be insulated. Conventionally,
To insulate the conductor roll 7, mount the roll stand 11
An insulating plate 24 is provided between the installation surfaces to be attached to 14 or the like. Insulation hoses are used to prevent the conductor roll stand 13 from being grounded, such as air supplied to the cylinder 23 etc. attached to the roll stand 11 and grease etc. supplied to the sliding part of the drop part 12. It is used.

[0006]

By the way, in the insulation of the conductor roll stand 13 configured as described above, fumes of the plating solution are deposited around the insulating plate 24 during use.
In order to cause insulation failure, it is necessary to periodically clean around the insulating plate 24 and replace the insulating plate 24. Further, it is necessary to maintain the insulating hose so that the conductor roll stand 13 is not grounded. If the maintenance of these insulations is insufficient, insulation failure may occur, causing power loss, fires due to heat generation, and furthermore, electric bearing corrosion and other troubles. For this reason, a great deal of effort is paid to the maintenance of the insulation.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to configure the insulation of a conductor roll stand so as to be hardly affected by evaporation fume of a plating solution, and to efficiently maintain and manage the insulation. It is intended to provide a conductor roll stand in an electroplating apparatus which can be performed in a short time.

[0008]

In order to achieve the above object, a conductor roll stand in an electroplating apparatus according to the present invention (claim 1) comprises a rolling element, an inner ring and a rolling bearing for a rolling bearing for bearing a conductor roll. At least one of the outer rings is formed of ceramics and is mounted on a roll stand. Since the conductor roll in the electroplating apparatus is not subjected to such a large load, at least one of the rolling element, the inner ring and the outer ring of the rolling bearing can be formed of ceramics, and thus formed of ceramics. By doing so, the conductor roll can be insulated. In addition, since the rolling bearings are housed in a sealed state in the bearing box, there is no invasion of plating solution evaporation fumes, etc., ensuring reliable insulation for a long period of time. It becomes possible to use an inexpensive hose having a sufficient strength, so that the insulation can be easily maintained and managed, and the cost can be reduced.

In a conductor roll stand in an electroplating apparatus according to the present invention (claim 2), at least one of a rolling element, an inner ring, and an outer ring of a rolling bearing for bearing a conductor roll is coated with ceramics. It is mounted on a roll stand. In this way, the rolling bearing for bearing the conductor roll,
Even if at least one of the rolling element, the inner ring and the outer ring is coated with ceramics on the surface, the same function and effect as the first aspect of the invention can be obtained.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram further showing a cross section of an upper half of a rolling bearing (roller bearing) according to the present invention.
In addition, the conductor roll stand excluding the roller bearing,
The conductor rolls and the like have the same configuration as those of the prior art shown in FIGS. 2 and 3 and are denoted by the same reference numerals.

The roller bearing 1 has a generally known structure and includes an outer ring 2, a roller 3 as a rolling element, and an inner ring 4. In this embodiment, the outer ring 2 is made of ceramics (silicon nitride and alumina). ). The ceramic may be the outer ring 2, the rolling element 3 or the inner ring 4. As shown in FIG. 1B, the metal ring 5 and the ceramic ring 6 have a double structure or a triple structure. It may be fitted in a laminated state to the structure, or at least one surface of the outer ring 2, the rolling elements 3, and the inner ring 4 may be coated with ceramics by thermal spraying or the like.

The roller bearing 1 having the above structure is mounted on the right and left shaft portions 8 of the conductor roll 7 shown in FIG.
And a bearing box 10 is attached to the outside of the roller bearing 1 in the same manner as before (see FIG. 1C). And the bearing box
As shown in FIG. 3, 10 is attached to a drop portion 12 of a roll stand 11 as in the prior art, and is configured as a conductor roll stand C of an electroplating apparatus. Note that the conductor roll stand C employs the conventional structure as it is for the other insulating structure (for example, insulating hose and the like) except for the insulation by the insulating plate 24.

In the conductor roll stand C of the electroplating apparatus having the above structure, the conductor roll 7 can be insulated by forming the outer ring 2 of the roller bearing 1 with ceramics.
Therefore, the insulating plate 24 conventionally provided between the installation surfaces for mounting the roll stand 11 on the gantry 14 or the like is unnecessary, and even if the insulation failure occurs, the structure including the roller bearing 1 and the bearing box 10 is provided. By holding the spare conductor roll 7 of the above, it is only necessary to replace the spare conductor roll 7 with the spare conductor roll 7, and the repair becomes easy.

[0014]

As described above, according to the conductor roll stand in the electroplating apparatus according to the present invention, at least one of the rolling element, the inner ring and the outer ring of the rolling bearing is formed of ceramics. Since the conductor roll can be insulated, and the rolling bearing is housed in a sealed state in the bearing box, there is no invasion of evaporation fumes of the plating solution, so that the insulation can be ensured for a long time. In addition, the maintenance and management of the insulation is easy because the conductor roll is removed from the roll stand together with the bearing box, and the rolling bearings need only be cleaned or replaced, and the cost can be reduced. In addition, even if insulation failure occurs, it is only necessary to replace the conductor roll with a spare conductor roll, and the repair becomes easy.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view further showing a cross section of an upper half of a rolling bearing (roller bearing) according to the present invention. FIG. 3 is an explanatory view of a heavy structure, and FIG. 3C is an explanatory view of a conductor roll to which the rolling bearing is attached.

FIGS. 2A and 2B are explanatory diagrams of a conductor roll, wherein a is an overall explanatory diagram and b is an enlarged explanatory diagram of an X part of a.

FIG. 3 is an explanatory view of a conductor roll stand,
FIG. 3A is a cross-sectional view excluding a front stand, and FIG.

[Explanation of symbols]

1: Roller bearing 2: Outer ring
3: Roller (rolling element) 4: Inner ring 5: Metal ring 6: Ceramic ring
7: Conductor roll C: Conductor roll stand

Claims (2)

[Claims] 1. A conductor roll stand in an electroplating apparatus, wherein at least one of a rolling element, an inner ring and an outer ring of a rolling bearing for bearing a conductor roll is formed of ceramics and mounted on a roll stand. . 2. An electroplating apparatus according to claim 1, wherein at least one of a rolling element, an inner ring and an outer ring of a rolling bearing for bearing a conductor roll is coated with ceramics and mounted on a roll stand. Conductor roll stand.