JP3020936B1 - Method for forming rust-proof coating on garbage cable - Google Patents

Abstract

Abstract: [PROBLEMS] Rust prevention performance differs depending on environmental conditions. For example, in a salt damage zone or a heavy industrial zone, there is a problem that rust prevention performance is low and replacement frequency increases. A galvanized iron stranded wire guard cable is inserted into an uncoiler device (2). Next, the galvanized iron stranded wire guard cable sequentially sent from the previous process is heated to a required temperature via the high-frequency heating device 3. Then
It is sent to the metal spraying device 4 and the galvanized iron strands 1, 1 ...
A metal sprayed coating 1d is formed on the outer peripheral surface of. Next, after sufficiently cooling through the cooling device 5, it is fed to the take-off device 6. The guard cable is taken out at a constant speed by the take-up device 6, and is sent to the take-up device in the next step. Next, it is preferable that the guard cable having the metal spray coating 1d formed on the outer peripheral surface is sequentially wound into a coil shape by the winding device 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a rust-preventive film on a galvanized iron stranded wire used for a guard cable for a safety facility such as a road. The present invention relates to a method for forming a rust-preventive film on a guard cable, comprising forming a film and combining a galvanized film and a metal film.

[0002]

2. Description of the Related Art Conventionally, as a method for forming a rust-preventive film on such a guard cable, there is a method of applying a solvent-type paint to a galvanized film or the surface of the galvanized film.

[0003]

However, in the above-mentioned conventional method for forming a rust-preventing film, the rust-preventing performance differs depending on the environmental conditions. In the zone, there are problems such as low rust prevention performance and frequent replacement.

[0004] The present invention has been made in view of such conventional problems, and uses a metal spraying method such as aluminum spraying in a salt damage zone and zinc aluminum alloy spraying in a heavy industrial zone. It is an object of the present invention to provide a useful method for forming a rust-preventing film on a guard cable, which can sufficiently exhibit its rust-preventing effect by selecting the same.

[0005]

SUMMARY OF THE INVENTION In order to solve the conventional problems as described above and to achieve the intended object, the configuration of the present invention is constituted by combining a plurality of galvanized iron strands. A method for forming a rust-preventive coating on a guard cable in which a metal spray coating is formed on the entire peripheral surface of the guard cable.

It is also desirable to temporarily loosen a plurality of twisted portions of the guard cable, form a metal spray coating on the outer peripheral surface of the deviated portion alone, and then restore the original twisted state. good.

Further, the plurality of twisted portions of the guard cable are temporarily loosened, and the side wires of each of the loosened galvanized iron strands are loosened from the periphery of the core wire, and the core wire of the deflected portion is loosened. Alternatively, after forming the metal spray coating on the outer peripheral surface of each side line alone, the original state may be restored.

Further, the present invention provides a method for forming a metal sprayed coating on the outer peripheral surface of a galvanized iron stranded wire formed by twisting a plurality of side wires around a core wire, and then forming the metal sprayed coating on the iron. A method for forming a rust-preventive film on a guard cable in which a plurality of stranded wires are combined.

Further, when forming a metal spray coating on the outer peripheral surface of each of the core wire and the side wire alone, it is necessary to form the metal spray coating while gradually adjusting the length of the excess core wire (hereinafter simply referred to as “excess core wire”). good.

The method for forming a rust-preventive coating on a guard cable according to the present invention thus constituted is a top priority in forming a metal sprayed coating having excellent rust-preventive performance. By forming a metal spray coating on the surface of the coating, the necessity of shot plus or the like as substrate adjustment is eliminated.

[0011] In addition, by the electrochemical protection function, which is the greatest feature of galvanization, the self-sacrifice protection function of consuming zinc before iron to protect iron and the metal sprayed coating combine to provide rust prevention performance. Will be significantly improved.

The reason is that by protecting the galvanized coating with a metal spray coating that is harder than the galvanized coating, it is possible to prevent the coating from being damaged. On the contrary, since the consumption area is reduced, the deterioration of the rust prevention performance is also greatly reduced by the electrochemical protection.

Further, depending on the corrosive environment in which the galvanized film and the metal spray are combined, for example, aluminum spray is performed in a salt damage zone and zinc aluminum alloy spray is performed in a heavy industrial zone. By selecting the type, the durability is significantly improved.

In particular, the surface of the guard cable is loosened at every surface or at every seven twisted wires, and the surface is further loosened from the periphery of the core wire of the seven twisted wires. The rust prevention performance is improved by performing metal spraying on the outer peripheral surface alone. Hereinafter, the present invention will be described in more detail with reference to Examples.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of a method for forming a rust-preventive film on a guard cable according to the present invention will be described with reference to FIGS.
This will be described with reference to FIG. In the figure, A is a guard cable before the formation of a rust-preventive coating according to the present invention. As shown in FIG. 1, this guard cable A has a cross-section in which three galvanized iron strands 1, 1,. It has a structure.

Each of the galvanized iron strands 1, 1...
.. Have a so-called 1 × 7 spiral structure in which six side wires 1b, 1b... Are twisted around the core wire 1a.
Are formed.

Hereinafter, the first step of the method of the present invention (the method of forming and processing a film according to claim 1) will be described. The method of the present invention comprises:
As a pre-treatment, each of the core wires 1a and the side wires 1b, 1b... Is independently coated with a zinc plating film 1c (see FIG. 1), and as shown in FIG. Insert the galvanized iron stranded wire guard cable.

At this time, the coil-shaped guard cable A set in the uncoiler device is pulled out at one end thereof at a predetermined speed by, for example, a draw-out roll (not shown), and is pulled up to a take-up device in a subsequent process. During this time, a predetermined tension is maintained.

Next, the second step will be described. The galvanized iron stranded wire guard cable sequentially sent from the previous process is heated to a required temperature via the high frequency heating device 3.

Next, the third step will be described. The heat-treated guard cable obtained in the previous step is
To form a metal spray coating 1d on the outer peripheral surfaces of the galvanized iron strands 1, 1,....

Next, the fourth step will be described. The metal-sprayed guard cable obtained in the previous step is sufficiently cooled through the cooling device 5. This cooling treatment is preferably performed in a state where the sprayed coating 1d in the previous step is completely cured.

Next, the fifth step will be described. The cooled guard cable obtained in the previous step is sent to the take-up device 6, which takes the guard cable at a constant speed and feeds it to the winding device in the next process.

Next, the sixth step will be described. The guard cable having the metal spray coating 1d formed on the outer peripheral surface is taken up at a constant speed in the previous process, and is sequentially wound into a coil shape by the winding device 7. The sectional structure of the guard cable after the formation of the metal spray coating in this embodiment is as shown in FIG.

Next, a second embodiment of the method for forming a rust preventive film according to the present invention (the method for forming and processing a film according to claim 2) will be described with reference to FIGS. To facilitate understanding, the same parts as those in the first embodiment are denoted by the same reference numerals, and only the parts having different configurations will be described with new numbers.

First, the first step of this embodiment (the method of forming and processing a film according to claim 2) will be described. As shown in FIG. 4, a galvanized iron stranded wire guard cable wound in a coil shape is inserted into the uncoiler device 2.

Next, the second step will be described. The galvanized iron stranded wire guard cables sequentially sent from the previous step are returned once by the loosening device 8 by three galvanized iron stranded wires 1, 1 ... (one by one).

Next, the third step will be described. In the three galvanized iron strands 1,1 ... returned in the previous process,
In the state of being returned, the high-frequency heating device 3 heats to a required temperature.

Next, the fourth step will be described. The metal spray coating 4 is applied to the three outer peripheral surfaces of the heated galvanized iron strands 1, 1.
d, 1d... are formed.

Next, the fifth step will be described. Metal-sprayed galvanized iron strands obtained in the previous process 1,1 ...
Is sufficiently cooled by the cooling device 5. It goes without saying that, similarly to the previous embodiment, this cooling treatment is performed in a state where the sprayed coating 1d in the previous step is completely cured.

Next, the sixth step will be described. The galvanized iron strands 1,1 ...
The loosely closed device 9 restores the original twisted state to obtain a guard cable.

Next, the seventh and eighth steps will be described. After the galvanized iron stranded wire guard cable brought back to its original state in the previous step is fed to the take-up device 6, it is wound into a coil by the take-up device 7. The cross-sectional structure of the guard cable after the formation of the metal spray coating in this embodiment is as shown in FIG.

Next, a third embodiment of the method for forming a rust preventive film according to the present invention (the method for forming a film according to claim 3) will be described with reference to FIGS. To facilitate understanding, the same parts as those in the first and second embodiments are denoted by the same reference numerals, and only the parts having different configurations will be described with new numbers.

This embodiment [Claim forming method of claim 3]
The first step will be described. First, as shown in FIG. 6, a galvanized iron stranded wire guard cable is inserted into the uncoiler device 2.

Next, the second step will be described. First, the galvanized iron stranded wire guard cable sent in the previous process is first passed through the No. 1 loosening device 8a (core wires 1a and 6).
) Are returned one by one.

Next, the third step will be described. The galvanized iron strands 1, 1 ... returned by the three bundles in the previous process,
Further, each of the side lines 1b, 1b... Is loosened from the periphery of the core wire 1a by the No. 2 loosening device 8b.

Next, the fourth step will be described. Excessive processing is performed by the core adjusting device 10 while the individual cores 1a loosened in the previous step are in a state of being shifted back.

Next, the fifth step will be described. The surplus treated core wire 1a and side wires 1b, 1b,.
As in the previous embodiment, heating is performed to a required temperature by the high-frequency heating device 3.

Next, the sixth step will be described. The heat-treated core wire 1a and side wires 1b, 1b obtained in the previous step are ...
In the metal spraying device 4 (the core wire 1a returned
A metal spray coating 1d is formed on each outer peripheral surface of each of the side lines 1b.

Next, the seventh step will be described. Metal thermal sprayed core wire 1a and side wires 1b, 1b obtained in the previous step
Are sufficiently cooled by the cooling device 5 as in the previous embodiment.

Next, the eighth step will be described. The core wire 1a and the side wires 1b, 1b,. That is, the side wires 1b, 1b...
And restore to the original galvanized iron strands 1, 1,.

Next, the ninth step will be described. Each of the three galvanized iron strands 1, 1 ... obtained in the previous step,
By returning to the original twisted state by the No. 2 loosely closing device 9b, a wire guard cable consisting of galvanized iron with a single coating on each wire is obtained.

Next, the tenth and eleventh steps will be described. After the wire guard cable is fed from the single-coated galvanized iron obtained in the previous step by the take-up device 6, it is wound into a coil by the take-up device 7 in the next process. The sectional structure of the guard cable after the formation of the metal spray coating in this embodiment is as shown in FIG.

Next, a fourth embodiment of the method for forming a rust-preventive film according to the present invention (the method for forming a film of claim 4) will be described with reference to FIG. To facilitate understanding, the same parts as those in the above-described first to third embodiments are denoted by the same reference numerals, and only the parts having different configurations will be described with new numbers attached.

This embodiment [Method of forming a film according to claim 4]
The first step will be described. As shown in FIG. 8, a galvanized iron stranded wire guard cable is inserted into the uncoiler device 2.

Next, the second step will be described. The galvanized iron stranded wire guard cable sequentially sent from the previous process is heated by the high frequency heating device 3 to a required temperature.

Next, the third step will be described. Each of the metal spray coatings 1 d is formed on the outer peripheral surface of the heat-treated galvanized iron stranded wires 1, 1.

Next, the fourth step will be described. Metal-sprayed galvanized iron strands obtained in the previous process 1,1 ...
Is sufficiently cooled by the cooling device 5.

Next, the fifth step will be described. The galvanized iron strands 1,1 ...
The bobbin winder 11 winds up.

Next, the sixth step will be described. Inserting the same number of bobbins into the bobbin stand 12 and twisting a plurality of galvanized iron strands (with a metal-sprayed coating formed thereon) by a stranding machine 13 to form galvanized iron A stranded guard cable is obtained.

Next, the seventh and eighth steps will be described. After feeding the wire guard cable from the galvanized iron obtained in the previous step to the take-up device 6, it is taken up by the take-up device 7. Incidentally, the cross-sectional structure of the guard cable subjected to the joining process after the formation of the metal spray coating is as shown in FIG.

Next, a fifth embodiment of the method for forming a rust preventive film according to the present invention will be described below. To facilitate understanding, the same parts as those in the first to fourth embodiments are denoted by the same reference numerals, and only the parts having different configurations will be described with new numbers attached.

This embodiment [Method of forming a film according to claim 5]
1st process is shown. The structure of the galvanized iron stranded guard cable of the third embodiment, that is, the core wire 1a and the six side wires 1b, 1b... (1 × 7 spiral structure) 3
.. Are returned one by one.

Next, the second step will be described. Furthermore,
Each of the side wires 1b, 1b,... Is loosened from the periphery of the core wire 1a in order to unwind the galvanized iron strands 1, 1,.

Next, the third step will be described. The core wire 1a and the side wires 1b, 1b ...
Then, similarly to the previous embodiment, a metal sprayed coating 1d is formed.

Since the core wire 1a becomes thicker by the thickness of the metal spray coating 1d, the side wires 1b, 1b,... Wound around and wound around the core wire 1a are insufficient due to the increase in the core wire diameter. On the contrary, the core wire 1a becomes excessive.

Therefore, unless the processing is performed using a core adjusting device for adjusting the excess core, this type of film forming and processing method cannot be implemented because, for example, the line stops due to the bending phenomenon and the like. Becomes Therefore, an example of the core adjustment device will be described below.

Calculation example of surplus core wire when guard wire is 1.8 mm and core wire is one by one and side wire diameter is 2.86 mm

[Table 1] Perimeter before core wire coating 2.86 × π ≒ 8.98 mm Perimeter after core wire formation 2.98 × π ≒ 9.36 mm Difference per pitch 9.36 mm-8.98 mm ≒ 0.3
8mm

Therefore, the number of pitches per meter is 1.000.
mm / 177.8 mm ≒ 5.62 pitch, the surplus length of the core wire per meter is 0.38 mm × 5.62 pitch =
2.14 mm, and the metal spray coating must be continuously formed while adjusting the surplus core wire.

In other words, by adjusting the surplus core wire 1a and forming the pre-treated galvanized coating 1c and / or the metal sprayed coating 1d, for example,
.. can be prevented from being caused by the bending phenomenon due to the contact of b, 1b.

The method for forming a rust-preventive film on a guard cable of the present invention is not limited to these examples, but can be freely modified within the scope of the object of the present invention. It encompasses all of them.

For example, the metal spray coating 1d may be formed on the underlayer through a resin coating if necessary, and the metal spray coating 1d may be used to coat the surface of the guard cable A and / or the resin coating. Can be prevented from being damaged, and the rust prevention effect can be sufficiently exhibited.

[0062]

According to the method for forming a rust-preventive coating of a guard cable according to the present invention, as described above, the metal-sprayed coating is selected according to the corrosive environment, and the rust-preventive performance is remarkably improved by combining it with a galvanized coating. Compared with only the formation of a zinc plating film, the replacement frequency is reduced to one third of the conventional frequency, and this effect has a great effect.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a guard cable according to the present invention before a rust-proof coating is formed.

FIG. 2 is a process diagram showing a first embodiment of a method for forming a rust-preventive film on the guard cable.

FIG. 3 is a sectional view of a guard cable formed with a metal spray coating in the first embodiment.

FIG. 4 is a process diagram showing a second embodiment of the method for forming a rust-preventive coating on the guard cable.

FIG. 5 is a sectional view of a guard cable formed with a metal spray coating in the second embodiment.

FIG. 6 is a process chart showing a third embodiment of the method for forming a rust-preventive coating on the guard cable.

FIG. 7 is a sectional view of a guard cable formed with a metal spray coating in the third embodiment.

FIG. 8 is a process diagram showing a fourth embodiment of the method for forming a rust-preventive film on the guard cable.

[Explanation of symbols]

 A Guard cable 1 Galvanized iron strand 1a Core wire 1b Side wire 1c Galvanized coating 1d Metal spray coating 2 Uncoiler device 3 High frequency heating device 4 Metal spray device 5 Cooling device 6 Pulling device 7 Winding device 8 Release device 8a No.1 Release Device 8b No.2 release device 9 Release device 9a No.1 release device 9b No.2 release device 10 Core adjuster 11 Bobbin winding device 12 Bobbin stand

Claims (5)

(57) [Claims] 1. A method for forming a rust-preventive coating on a guard cable, comprising forming a metal spray coating on the entire peripheral surface of a guard cable formed by joining a plurality of galvanized iron strands. 2. A method of temporarily loosening a plurality of twisted portions of a guard cable, forming a metal spray coating on the outer peripheral surface of the deviated portion alone, and restoring the original twisted state. The method for forming a rust-proof coating on a guard cable according to claim 1. 3. A plurality of twisted portions of the guard cable are temporarily loosened, and the side wires of the loosened galvanized iron stranded wires are loosened from the periphery of the core wire, and the core wire of the deviated portion is disengaged. 3. The method for forming a rust-preventive coating according to claim 1, wherein the metal sprayed coating is formed on the outer peripheral surface of each of the side lines alone, and then the original state is restored. 4. A metal sprayed coating is formed on the outer peripheral surface of a galvanized iron stranded wire formed by twisting a plurality of side wires around a core wire, and then a plurality of iron stranded wires on which the metal sprayed coating is formed are formed. A method for forming a rust-preventive film on a guard cable, comprising: 5. The method according to claim 1, wherein when the metal spray coating is formed on the outer peripheral surface of each of the core wire and the side wire alone, the metal spray coating is continuously formed while gradually adjusting the length of the excess core wire. 3. The method for forming a rust-preventive coating on a guard cable according to item 3.