KR19980028334A - Automotive window opening rope - Google Patents

Abstract

The present invention relates to a vehicle automatic window opening and closing rope, the present invention is a twisting rate of 4-11% and preforming range of 75-95% when twisting a rope made of a plurality of strands consisting of a plurality of wires By twisting the rope so that it is excellent in bending resistance, and by applying a special anti-rust grease to the rope for corrosion resistance, it has similar corrosion resistance to that of the conventionally coated rope but eliminates the plating process, and the manufacturing cost is significantly lowered. .

Description

Automotive window opening rope

The present invention relates to a rope that is formed by twisting a plurality of strands consisting of a plurality of wires, particularly for automotive automatic window opening and closing, which is excellent in corrosion resistance, abrasion resistance and fatigue resistance, and eliminating the plating process to reduce manufacturing costs It's about ropes.

In general, a wire rope (hereinafter referred to as a rope) used for opening and closing a window of an automobile is manufactured by twisting a plurality of wires or crossing a plurality of strands.

These ropes are sometimes used to prevent corrosion caused by salt water, etc. The following methods are used.

① Twisted a number of wires galvanized and tin plated and cross to make a rope.

② After the zinc or zinc alloy is plated on the nickel or nickel alloy plated steel, the wire is plated with tin or tin alloy again in the zinc or zinc alloy layer to draw a plurality of strands, and the rope is manufactured.

③ Zinc-aluminum alloy plated steel wire is drawn together to produce a rope.

The rope produced by the above method has excellent corrosion resistance compared to ordinary galvanized ropes, but its wear resistance and fatigue resistance are significantly lower. ① In the case of ①, the galvanized before the steel is drawn and tin plated after stranded, so that the process water Without manufacturing cost is also high. In the case of ②, the number of processes and costs are also increased because three plating processes are used to manufacture the rope. In the case of ③, the production cost is high because the plating is performed with zinc-aluminum alloy.

In general, small wire diameters are designed to reduce bending stress by improving the durability against bending fatigue of wire ropes, and the tensile force decreases because the wire diameter is reduced, and the number of wires increases by decreasing the tensile stress. Should be. Therefore, the diameter of the central strand is designed to be larger than that of the outer strand to improve the durability against bending fatigue.

In addition, in order to prevent damage to the strands constituting the rope when twisting the strand, the general rope is manufactured in the tightening ratio of 0-24%. Furthermore, to improve fatigue resistance, preforms have to be applied to the outer strands, with 95 to 100% being known to be suitable.

However, a typical rope is manufactured with a small tightening rate of 0-24% and a large preforming rate of 95-100%, so it is easy to be damaged if such a rope is used in a portion where bending fatigue is applied while accompanying a sliding motion.

The purpose of the invention is to provide an economical rope that has excellent performance in corrosion resistance, abrasion resistance and fatigue resistance, has the same corrosion resistance as conventional ropes, and excellent performance in bending fatigue with sliding motion. It is to provide.

Except to achieve the above object, the present invention twists a plurality of wire strands to form a strand, crosses the plurality of strands to form a rope, the tightening ratio is 4% to 11%, the preforming rate is It provides a vehicle automatic window opening and closing rope that is formed to be 75% to 90%.

Zinc wire is used for the wire element, and the outer circumferential surface of the rope body is coated with antirust grease.

The rope is, for example, twisted six wires to the center wire, and then gathered 12 wires into the second layer to form a thickened strand, and the outer strand of eight strands made by twisting six wires outside the outer wire center strand It can be formed in an 8x7 + (1x19) configuration by crossing it around.

1 to 4 are views of the present invention,

1,2,3 is a longitudinal sectional view of the rope of the present invention,

4 is an explanatory diagram of durability performance test

* Explanation of symbols for main parts of the drawings

1,11,21: rope 2,12,22: inner strand

6,17,25: outer strand

Hereinafter, described in detail by the accompanying drawings an embodiment of the present invention as follows.

1, 2 and 3 are longitudinal cross-sectional views showing different embodiments of the wire rope according to the present invention, in which the rope 1 of FIG. 1 is twisted with six wires 4 on the center wire 3 and then the second. Twist 12 wires (5) in layers to form a center strand (2), and twist 8 wires (8) around the outer wire (7) to form a center strand (2). ) Is produced by crossing around. The rope 1 thus made is called an 8x7 + (1x19) configuration.

The rope 11 shown in FIG. 2 includes a wire 14 smaller in diameter than the center wire 13, a wire 16 smaller in diameter than the wire 14, and a center wire around the center wire 13. 18 strands of wire 15 having the same diameter as 13 are twisted in one step to form a central strand 12, and 8 strands of outer strands twisted by six wires 19 around the outer wire 18. It is produced by crossing (17) around the center strand (12). The rope 1 thus made is referred to as an 8 × 7 + W (1 × 19) configuration.

In FIGS. 1 and 2, the center strands 2 and 12 have a parallel lead structure in which the first layer and the second layer are twisted in the same direction so that the wires of the respective layers are in line contact.

The rope 21 shown in FIG. 3 twists six wires 24 onto the center wire 23 to form a center strand 22 as described above, and has six strands of wire around the outer wire 26. It is a 7x7 structure manufactured by crossing the outer strand 25 of 8 strand which twisted (27) around the center strand 22.

The rope manufactured as described above has a difference in corrosion resistance depending on the material of the wire and the presence or absence of plating, but similar corrosion resistance may be obtained by applying special anti-rust grease to ordinary galvanized rope.

As a practical example, the plating adhesion of the wire is equal to 30g / cm 2, but the test results of corrosion resistance according to the plating treatment and the application of the special anti-rust grease are shown in the following table (1).

In Table (1), Example 1 applied a special rust preventive grease to a common galvanized rope, Example 2 used a zinc-aluminum 5% alloy wire on the outer strand, and Example 3 is a typical galvanized rope. 4 is a rope manufactured by twisting the outer strand and tinning.

Table (1) Corrosion Resistance Test Results

Example 1 Example 2 Example 3 Example 4 Center Strand Zinc cover Zinc cover Zinc cover Zinc cover Outer strand Zinc cover Zinc-Aluminum Alloy Zinc cover Galvanized / Tin Plated Oil Special Antirust Grease - - - Lamination Time 160 hours 160 hours 72 hours 144 hours

* Test method is tested according to salt spray test (KS D 9502).

In the table (l), the rope having excellent corrosion resistance is zinc-aluminum alloy plated in Example 2, but it can be seen that similar corrosion resistance is obtained even by applying a special anti-rust grease to the general galvanized rope of Example 1. Therefore, ropes with good corrosion resistance and low manufacturing costs are the ropes of example l.

The following is described with reference to FIGS. 1 to 3 as a description of the specific tightening rate and evi molding rate of the present invention.

First, looking at the tightening rate, the tightening rate in the rope of the configuration 8 × 7 + (1 × 19) of Figure 1 is obtained by the following equation (1).

Each symbol in the formula means the following.

a: outer diameter of center element 3 of the center strand

b ₁ : outer diameter of the first outer element 4 of the center strand

b2: outer diameter of the second outer element 5 of the central strand

c: outer diameter of center element 7 of the outer strand

d: outer diameter of outer strand 8 of the outer strand

D: Actual diameter of rope 1

When it has the structure of 8x7 + W (19) centering on the parallel lead strand of the Charrington type of FIG. 2, it is obtained by following Formula (2).

Each symbol in the formula means the following.

a: outer diameter of center element 13 of center strand

b _l : outer diameter of the first outer element 14 of the central strand

b2: outer diameter of the second outer element 16 of the central strand

c: outer diameter of center element 18 of outer strand

d: outer diameter of outer strand 19 of the outer strand

D: Actual diameter of rope 11

On the other hand, the tightening ratio of the rope having a 7 × 7 configuration as shown in Figure 3 is obtained by the following equation (3).

a: outer diameter of the center element 23 of the center strand

b: outer diameter of the first outer element 24 of the center strand

c: outer diameter of center element 28 of outer strand

d: outer diameter of outer strand 27 of the outer strand

D: Actual diameter of rope 21

And preformation rate (phi) can be obtained by following formula (4).

Each symbol in the formula means the following.

D: Actual diameter of the rope shown in FIG. 6 (A)

Γ: height of the mountain when the strands are loosened as shown in FIG. 6 (B)

According to the present invention, the ropes 1, 11, and 21 of FIGS. 1,2 and 3 have a tightening ratio of 4-11% and a preform rate of 75-90%.

Tightening rate of 4-11% means that if the tightening rate is more than 11%, the twisting of the rope causes excessive damage to the surface of the wire, resulting in poor durability.If the tightening rate is less than 4%, the ropes are loose. The durability is lowered in the bending stress which means the sliding motion.

And, the range of preforming rate is set to 75-90%, and when preforming rate is over 90%, it is insufficient to be used in bending stress accompanied by sliding motion due to twisting force between outer strand and center strand. If the preforming rate is 75% or less, the outer strands are loosened when the rope is cut and cannot be used.

Tightening rate can be obtained by equations 1,2,3 and preformation rate can be obtained by equation (4).

In addition, the rope 11 of FIG. 2 is the same as the rope 1 of FIG. 1, but the central strand is manufactured in one process.

4 is an apparatus for testing durability using two pairs of rollers, in which a weightless 31 is coupled to a drum 32, and a driving roller 33 that is rotated by a driving means (not shown) such as a motor. And a guide roller 34 is installed between the drum 32 and the drum 32, and the ropes 1, 11 and 21 are loaded and tested between the drum 32 and the driving roller 33. .

When the ropes 1, 11 and 21 are fixed to the drum 33 as shown in FIG. 4, the load 45Kg acts on the ropes 1, 11 and 21. The drum 31 reciprocates at 55 cycles per minute with a stroke of 349.2 mm in the state that the load is applied, and the durability performance is measured by this reciprocating frequency.

Comparison test results of durability according to the tightening ratio and preforming rate are shown in Table (2).

As shown in Table (2), the ropes alloyed and plated on the outer strands have a significantly lower durability compared to ordinary zinc-plated ropes, even when the same galvanized ropes have a tightening rate of less than 4% and 11%. In case of abnormality, the endurance count is lower than the range of 4-l1%, and even when the preforming rate is 90% or more, the endurance count decreases.

As described above, the present invention automotive automatic window opening and closing rope has a tightening ratio of 4 to 11% and a pre-molding rate of 75 to 90%, thereby twisting the rope to have excellent bending fatigue resistance, and to provide special corrosion resistance. By applying grease to the rope, the plating process is eliminated while having corrosion resistance similar to that of a conventionally plated rope, and the manufacturing cost is remarkably low.

While the embodiments of the present invention have been described so far, the present invention is not limited thereto, and various embodiments that can be modified and changed within the true spirit and scope of the principles described and claimed are within the protection scope of the present invention. You will have to understand.

Claims (3)

When strands are twisted to form a plurality of wires, and the ropes are formed by crossing the strands, the tightening ratio is 4% to 11%, and the preforming rate is 75% to 90%. Car window opening rope. 2. The automatic window opening and closing rope according to claim 1, wherein the wire sink is galvanized and the outer circumferential surface of the rope body is coated with antirust grease. The eight-stranded outer strip according to claim 1 or 2, wherein six wires are twisted to the center wire, followed by twisting twelve wires with a second layer to form a center strand, and twisting six wires around the outer wire. A rope for opening and closing an automobile window, wherein the land is crossed around the center strand and bound in an 8 × 7 + (1 × l9) configuration.