JPS588776Y2 - Continuous electroplating equipment for contact wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous electroplating device for continuously electroplating a contact wire with a metal or alloy such as tin, solder, or nickel.

For example, when contact wires are used as rigid contact wires for subways, mole rails, etc., the outer periphery of the contact wire is coated with tin, solder, nickel, etc. in order to prevent corrosion due to contact with other dissimilar metals such as trestles and wires. Plating metals or alloys.

Various methods can be considered for these plating methods, but electroplating is advantageous in terms of uniformity of plating thickness.

However, since contact wires have unique grooves and generally have a large outer diameter, there are many problems with using the same equipment used for plating ordinary wire rods.

Conventionally, as an ordinary continuous electroplating device for wire rods, as shown in FIG.
is continuously supplied to maintain the tension of the wire rod 2 and the plurality of presser rolls 3-1, 3-2, 3-3.

3-4 A device having a structure in which the wire rod 2 is caused to run in a straight line by guide rolls 3-5 and pass through an overflow set of pre-treatment tanks 4 and 6, an electroplating tank 8, and a washing tank 5 and 7.9. It is used.

However, in the case of contact wire, the outer diameter is generally large;
In devices such as those described above, the wire must be under great tension.

Moreover, a plurality of presser rolls 3-1, 3-2, 3-3
．． 14, to run the contact wire in a straight line, but in this case, in the wire threading work, it is necessary to pass each folding roll while stretching the contact wire, resulting in poor work efficiency.

Moreover, since the terminal end of the contact wire becomes a free end with a wire curl, there is a risk of damage to the equipment and injury to the operator.

The biggest drawback of this method is that the contact wire is easily twisted because it is passed through a plurality of presser rolls while being stretched.

In particular, when using a rigid contact wire, the contact wire is often fixed with a long wire, for example, about 1 m in length.
If the wire is twisted, the ear will not match the groove and the wire will become unusable.

This torsion must be at most several degrees/bilateral f', but in the above-mentioned devices it may locally even exceed 5 degrees/Km.

The present invention was developed in view of the above-mentioned problems, and by arranging a straightening machine at least before the first processing device to straighten the contact wire by plastic deformation, the contact wire can be straightened during electroplating. It is an object of the present invention to provide a continuous electroplating device for contact wires that does not cause twisting, has good workability, and is safe.

The present invention is a continuous electroplating apparatus for a contact wire that passes through each processing device in a straight line, characterized in that a straightening machine is disposed at least before the first processing device. It is a plating device.

FIG. 2 is a longitudinal sectional view showing an embodiment of the present invention.

In the figure, the same reference numerals as in FIG. 1 indicate the same parts.

A contact wire 12 is continuously supplied from a supply 1, and a straightening machine 11 is arranged in front of a pretreatment tank 4, which is the first treatment device.

By this straightening machine 11, the contact wire 12 is straightened by plastic deformation.
6, the wire passes through the electroplating tank 8, the washing tank 5, 7.9 in a straight line, and is wound on the final winder 10 via the capstan 15 without twisting or bending the wire.

In this case, there is no need for strong presser rolls 3-1, 3-2, 13, 14, etc. as shown in Fig. 1 between each device.
A guide roll 13 that can support the deflection of the contact wire 12 due to its own weight, and a presser roll 14 in front of the capstan 15 are installed.
The extent of this is to provide a

Further, as the straightening machine 11 used in the present invention, for example, a straightening roller type machine, an example of which is shown in FIG. 4, is suitable.

The straightening machine 11 includes a plurality of rollers 16 arranged alternately in the upper and lower stages, and the number of rollers 16 is usually preferably 5 to 9.

Furthermore, if one of the rollers 16 is provided with a manual handle 17 that can be rotated manually, the work of threading the contact wire 12 through can be facilitated, improving work efficiency.

Next, FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention, in which the same reference numerals as in FIG. 2 indicate the same parts.

In the method shown in Figure 2, the length of the equipment is long, and if you include the area for storing and transporting materials and products, it requires a considerable equipment area, so if sufficient equipment area cannot be obtained,
A system in which a series of processing devices are arranged in two stages, upper and lower, as shown in FIG. 3 is effective.

That is, in the figure, the pretreatment tank 4 and the washing tank 5 are arranged in the upper stage, the pretreatment tank 6, the electroplating tank 8, and the washing tank 7.9 are arranged in the lower stage, and the direction of the contact wire 12 from the upper stage to the lower stage is shown. For the conversion, for example, one (or a set) of guide rolls 18 with the largest possible bending radius is provided.

In this case, the straightening machine 11-i is placed in front of the pre-treatment tank 4, which is the first treatment device on the upper stage, and the straightening machine 11-2 is placed in front of the pre-treatment tank 6, which is the first treatment equipment on the lower stage. ing.

The straightening machine 11-2 is necessary for removing the wire distortion caused by the direction change of the contact wire 12 by the guide roll 18.

These straightening machines 11-1 and 11-2 may also be devices similar to those described above.

Pretreatment devices 4 and 6 shown in FIGS. 2 and 3,
Normally, the first device 4 performs degreasing using alkali or solvent, or alkaline electrolytic degreasing, and the device 6 performs pickling or desmutting. For reasons such as the long time required for degreasing to remove oil that has entered the grooves, and the risk of forming an oxide film that is unfavorable to plating if the direction is changed after pickling. As shown in FIG. 3, it is preferable to arrange the pretreatment tank 4 in the upper stage and the pretreatment tank 6 in the lower stage.

In addition, even in the continuous electroplating apparatus for contact wires of the present invention, some vertical movement of the contact wire is unavoidable, and some ingenuity is required for the power supply device to the wire.

FIG. 5 is a perspective view showing an example of the power supply device used in the present invention. A guide hole 21 having a circle slightly larger than the diameter of the shaft 20 of the power supply roll 19 is provided in the stand 22, and the guide hole 21 is inserted into the power supply roll. By passing the shaft 20 of No. 19, it is possible to easily respond to the above-mentioned vertical movement of the contact wire.

The contact wire to which the present invention is applied mainly has grooves and a cross-sectional shape of circular, trapezoidal, square, etc., with a cross-sectional area of 60 to 200 mm.
The contact wire is preferably made of copper or a copper alloy, but is not particularly limited to these.

The present invention is particularly effective for circular contact wires, which tend to be twisted in conventional devices.

As described above, the device of the present invention is a continuous plating device for trolley wire that passes through each processing device in a straight line, and since the straightening machine is arranged at least before the first processing device, the straightening machine Because the grooved contact wire is straightened in advance by plastic deformation, no twisting or bending of the contact wire occurs during electroplating, and there is no trouble caused by free ends at the end.
Workability in electroplating work is good and safe, and there is an effect that an electroplated contact wire can be manufactured without twisting of the groove (for example, increase in twist within 0.3 degrees).

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an example of a conventional continuous wire electroplating apparatus. FIGS. 2 and 3 are longitudinal sectional views each showing an embodiment of the device of the present invention. FIG. 4 is a perspective view of an example of a straightening machine used in the present invention, and FIG. 5 is a perspective view of an example of a power supply device. 1...Supply, 2...Wire rod, 11
, 3-23-3.3-4, 14... Presser roll, 3-5°13.18... Guide roll, 4
, 6... Pretreatment tank, 5, 7, 9... Washing tank, 8... Electroplating tank, 10...
Winding machine, 11.11-1.11-2... Straightening machine, 12... Contact wire, 15... Capstan, 16... Roller, 17... Manual handle, 19... Power supply roll, 20...
...Shaft, 21...Guide hole, 22...
·stand.

Claims (2)

[Scope of utility model registration request] (1) A continuous electroplating device for a contact wire that passes through each processing device in a straight line, characterized in that a straightening machine is disposed at least before the first processing device. Device. (2) A series of processing devices of a continuous electroplating apparatus are arranged in two stages, upper and lower, and a straightening machine is arranged in front of the first processing device of each stage, respectively. Continuous electroplating equipment for contact wire.