JPH04327017A - Control inner cable - Google Patents

Abstract

PURPOSE:To provide a control inner cable that can retain excellently the qualities of anti-fatigue and anti-corrosion over a long period of time and also realize protection against water. CONSTITUTION:An inner layer cable 1 is formed by intertwining 7 pieces of a strand 3 made up of 7 pieces of a wire 2, and an outer layer cable 6 is formed by intertwining 8 pieces of a strand 5 made up of 7 pieces of a wire 7. And a fluid oil agent 4 is spread over each wire 2 constituting the inner layer cable 1, and a soft solidlike oil agent 8 is filled between the outer layer cable 6 and the inner layer cable 1, and also openings (a) are formed between each other by administering 102% shaping to the strands 3 constituting the inner layer cable 1 at the time of twisting them together.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control inner cable used for power transmission in automobiles and various industrial machines.

0002

2. Description of the Related Art This type of control inner cable is constructed by twisting a plurality of wires or strands together. It is then inserted into a sleeve made of synthetic resin or the like, and in this state is moved in the axial direction.

[0003] In such conventional control inner cables, the wires constituting the cable are plated with various types of plating to improve their corrosion resistance and abrasion resistance.

0004

[Problem to be solved by the invention] However, when using plating, the plating layer tends to be damaged due to the friction caused by the fretting between the wires and strands that make up the cable after long-term use. It is difficult to maintain good wear resistance and corrosion resistance, and the fretting reduces fatigue resistance, and furthermore, corrosion is accelerated by the infiltration of moisture from the outside world.

[0005] The present invention was made with attention to these points, and its purpose is to maintain good fatigue resistance and corrosion resistance over a long period of time, and to ensure protection against moisture. The object of the present invention is to provide a control inner cable that can be used to control various functions.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention twists together a plurality of strands each made of a plurality of wires, or twists a large number of wires into a multilayered structure. An inner layer cable is formed by twisting a plurality of strands made of a plurality of wires around the outer circumference of the inner layer cable to form an outer layer cable.A fluid oil is applied to each wire constituting the inner layer cable, and a fluid oil is applied to the outer layer cable. A soft solid oil is filled between the inner layer cables and the inner layer cables, and the strands or wires constituting the inner layer cables are molded by 100% or more when they are twisted to form a gap between them. It is.

[0007]

[Function] The lubricant provided in the cable and the gaps formed between the strands or wires that make up the inner cable reduce fretting between the wires and strands, improving fatigue resistance, and the lubricant The wires and strands are protected from corrosion. The fluid oil in the center of the cable is sealed by the soft solid oil placed on the outer periphery, so this fluid oil does not wash away and remains with the soft solid oil for a long time. held within the cable. In addition, the soft solid oil prevents moisture from entering the center of the cable, thereby reliably preventing corrosion due to moisture.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a cross section of a control inner cable according to a first embodiment, and numeral 1 indicates an inner layer cable, and this inner layer cable 1 has a 7×7 twisted structure. i.e. 7
A strand 3 is obtained by twisting the wires 2 together, and seven such strands 3 are twisted together. During this twisting, each side strand 3 disposed around the outer periphery of the core strand 3 is twisted by 100% or more, for example, 102%.
This molding forms a gap a between the strands 3 on each side. Further, each wire 2 constituting the inner cable 1 is coated with a fluid oil 4 in advance, and the inner cable 1 is filled with this oil 4.

[0009] On the outer periphery of such an inner layer cable 1, an outer layer cable 6 made of eight outer layer strands 5 twisted together is provided, so that the overall structure of the cable is 7×7+8×7. There is. Each of the outer layer strands 5 has a 1×7 structure in which seven wires 7 are twisted together, and a soft solid lubricant 8 is filled between the outer layer cables 6 made of these outer layer strands 5 and the inner layer cables 1. has been done.

Each of the wires 2 and 7 is a steel wire that has been subjected to Zn plating, Zn and Ni plating, Zn-Al plating, etc. and drawn to a predetermined diameter. And for example, the diameter of the wire 2 of the core strand 3 is 0.09
mm, the diameter of the wire 2 of the side strand 3 is 0.08 mm
, the diameter of the wire 7 of the outer layer strand 5 is 0.14 mm.

The fluid lubricant 4 applied to the wires 2 constituting the inner cable 1 is based on petroleum hydrocarbon oil with a pour point of -40°C or lower, and a wear-reducing agent (FRITION) is added to the base.
MODIFIER) 5-20%, increasing viscosity agent 10
It is made by adding ~30%, and its properties are viscosity 50 ~
150m/S @40°C, pour point -40°C or lower, and exhibits a fluid state at room temperature.

The soft solid oil agent 8 filled between the outer layer cable 6 and the inner layer rope 1 uses the oil agent 4 as a carrier and contains 4 petroleum-based waxes such as microwax and petrolatum.
Contains 0 to 60%, dropping point 50℃ or higher, consistency 1
50 to 250 @25°C, and exhibits a soft solid state at room temperature. In addition, it is also possible to add commercially available rust preventive agents and antioxidants to the oil agents 4 and 8, as necessary, in order to improve rust preventive power and oxidation stability.

To explain the process of manufacturing the control inner cable constructed as described above, first, seven wires 2 are twisted together to form the core and side strands 3. During this twisting, oil 4 is applied dropwise to each wire 2.

Next, as shown in FIG. 2, the six side strands 3 are twisted together around the outer periphery of the core strand 3 by the twisting device 10 to form the inner layer rope 1. At this time, the twisting device 10
The inner layer cable 1 led out from the inner layer cable 1 is guided into the oil tank 12 via the dipping roll 11.

An oil agent 8 is heated to about 80° C. and stored in the oil tank 12 . Although this oil agent 8 is in a soft solid state at room temperature, it exhibits a certain degree of fluidity by being heated to about 80° C. Therefore, the oil agent 8 is applied to the peripheral surface of the inner layer cable 1 that is sequentially introduced into this oil agent tank 12. is applied. Note that 13 shown in FIG. 2 is a device for uniformly applying the oil agent 8 to the circumferential surface of the inner layer cable 1. After applying the lubricant 8 to the peripheral surface of the inner layer cable 1 in this manner, eight outer layer strands 5 are twisted together around the outer periphery of the inner layer cable 1 to form an outer layer cable 6.

In the control inner cable having such a structure, since the inside thereof is filled with the lubricant 4 and 8, fretting between the wires 2 and 7 is reduced, and especially in the side strands 3 of the inner cable 1, Since the gap a is formed between them, fretting between them is greatly reduced, and therefore fatigue resistance is reliably improved.

Since the oil agent 4 filled inside the inner cable 1 exhibits fluidity at room temperature, its lubricity is particularly good. This lubricant 4 is sealed with a soft solid lubricant 8 disposed on the outer circumference thereof, so that the fluid lubricant 4 does not flow out to the outside through the gap a or the like. Furthermore, since the lubricant 8 between the outer layer cable 6 and the inner layer cable 1 has a soft solid state, it will not flow out to the outside.

[0018] Therefore, a sufficient amount of the lubricant 4, 8 remains in the cable almost semi-permanently, making it possible to maintain excellent fatigue resistance over a long period of time. Since the lubricants 4 and 8 do not leak to the outside of the cable, it can be applied even to cables for which it is undesirable for oil to adhere to the cable surface.

Furthermore, the oil agents 4 and 8 in the cables prevent corrosion of the wires 2 and 7, allowing good corrosion resistance to be maintained over a long period of time. Since the inside of the outer layer cable 6 is filled with a soft solid lubricant 8, even when the cable is used in an environment where it is exposed to moisture such as rainwater, the soft solid lubricant 8 will keep the cable inside the cable. This prevents moisture from penetrating into the surface and maintains good corrosion resistance.

FIG. 3 shows a control inner cable according to a second embodiment of the invention, in which the inner cable 1 consists of 19 wires 2 twisted together in one step.
It has a multilayer twist structure of ×19.

[0021] Each wire 2 constituting this inner layer cable 1
100% or more during the twisting process, e.g. 102%
A slight gap a is formed between the wires 2. Six outer layer strands 5 having a 1×7 structure are twisted together as outer layer cables 6 around the outer periphery of the inner layer cable 1, so that the overall structure is 1×19+8×7.
It becomes. A fluid lubricant 4 is applied to each wire 2 constituting the inner cable 1, and this lubricant 8 fills the inner cable 1, and a soft solid lubricant 8 is provided between the outer cable 6 and the inner cable 1. is filled. Even in such a configuration, the same effects as in the first embodiment can be achieved.

Next, 7×7+8× which is an embodiment of the present invention
Tables 1 and 2 show the results of measuring the fatigue resistance and corrosion resistance of cables with a 7 structure and a 1×19+8×7 structure, and two types of cables with a 1×19+8×7 structure as comparative products.

[0023]

[Table 1]

[0024]

[Table 2]

As is clear from these tables, it can be seen that the products of the present invention have superior fatigue resistance and corrosion resistance compared to the comparative products. Regarding fatigue resistance, J
Measured by IS G 3535 Aircraft Wire Rope Fatigue Test Method. Regarding corrosion resistance, JIS Z
Measured using the 2371 salt spray test method. That is, the cable was left in a salt spray environment, and after 150 hours, the cable was taken out, the outer layer of the cable was removed, and the state of rust on the surface of the inner layer was examined (surface area ratio).

[0026]

As explained above, according to the present invention, it is possible to provide an extremely durable control inner cable that can maintain excellent fatigue resistance and corrosion resistance over a long period of time.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a control inner cable according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a process of applying an oil to the inner cables of the control inner cable.

FIG. 3 is a sectional view of a control inner cable according to a second embodiment of the present invention.

[Explanation of symbols]

1...Inner layer cord 2...Wire 3...Strand 4...Oil agent 5...Strand 6... Outer cord 7...Wire 8...Oil agent a...Gap

Claims (2)

[Claims] 1. A plurality of strands each made of a plurality of wires are twisted together to form an inner layer cable, and a plurality of strands each made of a plurality of wires are twisted together to form an outer layer cable around the outer periphery of the inner layer cable. Each wire constituting the inner layer cable is coated with a fluid oil, a soft solid oil is filled between the outer layer cable and the inner layer cable, and the strands forming the inner layer cable are coated with a fluid oil when they are twisted. A control inner cable characterized by having more than 100% molding to form a gap between them. 2. A plurality of wires are twisted together in a multilayered structure to form an inner layer cable, a plurality of strands each made of a plurality of wires are twisted around the outer periphery of the inner layer cable to form an outer layer cable, and the inner layer cable is A fluid oil is applied to each of the constituent wires, a soft solid oil is filled between the outer layer cable and the inner layer cable, and each wire making up the inner layer cable is 100% stranded when twisted. A control inner cable characterized in that the above molding is applied and a gap is formed between them.