JPH0121237B2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a shell rotary conductor roll that is incorporated into a device that continuously applies Zn, Sn, etc. to a steel plate and supplies power to a strip. be.

(Prior art) A conductor roll is used to continuously feed strips A in a continuous plating device shown in Fig. 2 for obtaining steel sheets plated with zinc, tin, etc., which are widely used for automobiles, can manufacturing, etc. Place conductor roll C before it enters plating tank B, and strip strip A.
As shown in Fig. 3, the conventional conductor roll C has a shaft D that is integrally supported by a bearing E, and is rotatably supported by a bearing E. Attach connector ring F,
The carbon brush G was crimped and the strip A fed in contact with the outer periphery of the conductor roll C was supplied with electricity as indicated by the dotted arrow.

(Problems to be Solved by the Invention) In the conventional conductor roll described above, the distance from the connector ring F to the strip A is long, so there is a large electrical loss, and the temperature may rise due to the resistance of the shaft D portion. The biggest disadvantage is that the power supply efficiency decreases, and the shrink-fitted shell may come off due to heating, and the structure becomes complicated because a rotary joint is required in the piping to send the cooling water that cools the shell through the shaft. There were problems such as the risk of water leakage.

It is an object of the present invention to solve these problems, increase power supply efficiency, reduce the temperature rise of the shell, simplify cooling to an air-cooled system, and facilitate maintenance.

(Means for Solving the Problems) The present invention achieves the above object by providing a conductor roll for supplying power to the strip of a continuous plating device with a shaft and a shell separated and rotatably mounted on a shaft to which the shell is fixed. This is a shell-rotating conductor roll in which the shell itself is supported, driven and rotated, and a carbon brush is brought into contact with the inner periphery of the shell to supply electricity.

The conductor roll is cooled by an air cooling method in which air is fed into the shell through a fixed shaft and exhausted from both ends of the shell.

(Function) The above-mentioned shell rotating type conductor roll has a fixed shaft and only the shell is driven to rotate, so the rotational power is small. By supplying power to a strip that moves in contact with the outer periphery, the power supply path can be made the shortest distance, increasing power supply efficiency and minimizing current carrying resistance.
This greatly simplifies the cooling structure by suppressing temperature rises in various parts and allowing the cooling structure to be changed from the conventional water-cooled type to an air-cooled type. Of course, it is also possible to adopt a water-cooled type.

(Example) An embodiment will be described below based on the drawings.

Reference numeral 1 is a shell having a cylindrical shape, and bearing housings 2, 2 are provided at two locations inside, and covers 3, 3 are attached to both ends, and drive pulleys 4, 4 are fixed to these covers 3, 3.

5 is a fixed shaft, which is supported at both ends by shaft supports 6, 6 and is fixed to pedestals 8, 8 via ice-free liners 7, 7, and bearings 9, 9 are mounted on this fixed shaft 5. It fits into the bearing housings 2, 2 and rotatably supports the shell 1.

Reference numeral 10 denotes a brush holder, which includes two cylindrical brush supports 12 and 12 made of copper and equipped with flanges, which are attached to the fixed shaft 5 via green sleeves 11 and 11a.
The carbon brushes 13 are attached to the outer periphery of the shell 1 at a plurality of locations to hold the carbon brushes 13, and the carbon brushes 13 are connected to the brush support 12 on the inner periphery near both ends of the shell 1 by flexible sealed wires (not shown). A power supply is connected to the end of the cylindrical part of the brush support 12 protruding outward from the end of the shell 1 through a screw hole 12c to a power connection part 12b, and the brush support 12 is prevented from rotating by a key 14 on the fixed shaft 5. It is fixed by a fixing nut 15.

16 is a cooling ventilation hole bored in the center of the fixed shaft 5;
Cooling air sent from the end of the shaft is discharged into the center of the interior of the shell 1 from the blow-off hole 17 provided near the center of the shaft, and this cooling air is sent to the brush holder 1 from the ventilation hole 18 provided on the outer periphery of the bearing housings 2, 2.
The carbon brush 13 passes through the 0 part and transfers the scraped carbon powder to the covers 3, 3 and the brush support 1.
The shell 1, the bearing housings 2, 2, etc. are cooled while being discharged to the outside from the gaps 19, 19 provided between the shell 1, the bearing housings 2, 2, and the like.

20 is a bearing fixing nut 21, bearing covers 23 and 24 are dustproof seals, and 25 is a drive belt.

Now drive belts 25, 25 pulleys 4, 4
When the shell 1 is rotated, the shell 1 supported by the bearings 9, 9 attached to the fixed shaft 5 through the covers 3, 3 at both ends rotates together with the outer rings of the bearings 9, 9, and the inner circumference near both ends of the shell 1 is rotated. By directly applying electricity to the shell 1 from the carbon brushes 13, 13 which are in contact with each other at the farthest distance, the strip A that moves in contact with the outer periphery of the shell 1 has the lowest resistance to electricity, achieving the highest efficiency in power supply. This eliminates electrical loss and makes it possible to construct an economical automatic plating line.

Note that the covers 3, 3 at both ends of the shell 1 have the function of protecting the carbon brushes 13, 13, and inspection and replacement of the carbon brushes 13, 13 are performed by removing the covers 3, 3.
If the pulley 4 is made larger in diameter than the shell 1, the gap 19 can be enlarged, and the cover 3,
The carbon brushes 13, 13 can be inspected and replaced without removing them, and service can be easily performed.

Further, although the drive belt 25 and the pulley 4 are shown as being provided at both ends of the shell 1, there is no problem if they are provided at one end.

(Effects of the Invention) According to the shell-rotating conductor roll of the present invention as described above, since current is applied directly to the inner surface of the shell, power can be supplied to the strip moving in contact with the outer periphery of the shell with the highest efficiency while minimizing the current loss. Therefore, electric power costs are reduced, and the temperature rise due to current-carrying resistance is extremely small, making it possible to change the cooling method from conventional water cooling to air cooling, thereby simplifying the cooling structure. Of course, it is also possible to use a water-cooled type.

Furthermore, since the shaft is fixed, there is no need for a rotary joint to create a cooling path or a lubrication path through the shaft to the bearing, which simplifies the structure and allows for inexpensive and reliable cooling without leakage. In addition to providing a lubricated structure, since the only rotating part is the shell, the rotational power is small, and when the shell is worn out, it is possible to repair only the shell or replace it with a spare shell, making maintenance easier. It is easier to manage and can generate large economic benefits overall.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional side view showing an embodiment of the shell rotating type conductor roll of the present invention, Fig. 2 is a schematic diagram of a continuous plating device using the conductor roll, and Fig. 3 is a front view of a conventional conductor roll. . A...Strip, 1...Ciel, 5...Fixed shaft, 9...Bearing, 10...Brush holder, 12...Brush support, 13...Carbon brush.

Claims (1)

[Claims] 1. A shell-rotating conductor roll, which is a roll that supplies power to the strip of a continuous plating device, and is characterized in that the power is supplied by contacting a carbon brush with the inner periphery of a rotating shell supported by a fixed shaft.