JP2769456B2 - Wire rope terminal processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rope terminal processing method for processing a wire rope terminal.

[0002]

2. Description of the Related Art One of the methods for treating the end portion of a wire rope is a method of forming an annular ice price 12. For example, Japanese Utility Model Application Laid-Open No. 63-123696 discloses a method of forming an ice ply by inserting a swaging sleeve into a rounded end of a wire rope.

Further, Japanese Utility Model Laid-Open Publication No. 59-28594 discloses a method in which a strand of a wire rope is loosened, a wire or the like is inserted into the gap, and the wire rope for a cableway is partially expanded.

[0004] However, in the rope end portion processed by the conventional method, as shown in FIG.
When the slinging worker handles it with bare hands, the bearded sharp end 14 is stabbed in his hand and injured, or the gloves or clothes are caught by the slinging worker and the worker is dragged. . As described above, there is a possibility that an injury may occur during handling of the rope for slinging operation, and thus there is a problem from the viewpoint of health and safety.

Therefore, in the conventional method, as shown in FIG. 10, a method is employed in which the winding band 8 is wound around the wire insertion portion 13 and the end portion 14 of the sharp wire is covered with the winding band 8. ing.

[0006]

However, in the prior art, if the winding is broken during use, the winding band 8 may be unraveled. In addition, the winding band 8
Is wound around the wire insertion part 13
Cannot be directly observed with the naked eye, and the state of occurrence of rust cannot be visually inspected.

On the other hand, a metal tube made of aluminum or lead is crimped to the wire insertion portion 13 to form a sharp wire end portion 1 having a beard.
There is a way to contain 4. However, this conventional technique has various problems described below.

First, when the sling is pulled out of the suspended load, the end of the metal tube is caught by the load, making it difficult to pull out or damaging the load. Secondly, when suspending a load having a circular cross section, the sling does not follow the load due to the metal tube, and the suspended state of the load becomes unstable.

Third, the metal tube hits the load and compresses the load. Fourth, since a bending load acts on the rope at both ends of the metal tube, the wire at this portion is easily broken, and the life of the rope is shortened.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to form a safe rope terminal portion which is not injured when a worker handles it by a simple operation. And a wire rope termination method with a long-life rope termination with excellent safety, maintainability, and workability that enables easy visual inspection of the appearance of rust during use. Is to do.

[0011]

According to the present invention, there is provided a wire rope terminal processing method comprising the steps of loosening the twist of a strand in the vicinity of a rope end, inserting a wire having the rope end unscrewed into a gap between the loosened strands, A method for terminating a wire rope forming an annular ice price, comprising:
A product made by bonding a low water-absorbing outer layer material to a shrinkable inner layer material
Put a qualitatively transparent composite resin layer on the wire insertion part
By applying and heating, the inner layer material of the composite resin layer
The wire insertion portion is brought into close contact with the wire insertion portion.
The composite resin layer is covered with the composite resin layer .

[0012]

As the inner layer material of the coating resin layer, it is preferable to use any one of polyolefin, polyvinylidene fluoride and PVC excellent in heat shrinkability, but it is also possible to use polypropylene, polyvinyl chloride or the like.

Further, it is preferable to use any of polyethylene, polypropylene, polyvinyl chloride, polyolefin, polyvinylidene fluoride, and PVC which are excellent in low water absorption as the outer layer material of the coating resin layer.

Further, the indication of the date of manufacture and the type of the rope is attached to the outer peripheral surface of the inner layer material, or the display layer is inserted between the inner layer material and the outer layer material, so that the worker or the inspector can see the appearance. Preferably, the rope can be identified only by visual inspection.

In the method for processing a terminal of a wire rope according to the present invention, the wire insertion portion is formed of a composite resin having a double inner and outer layer.
Since coated with a layer, the sharp protrusions of the wire ends protruding rope outside covered by a smooth layer of resin, slinging worker without incurring injuries such as cuts limbs and which clothes Without being dragged by the body
You can handle this safely. Especially for outer layer materials
Swelling deterioration including moisture due to the use of water-absorbing material
And this is good for the inner layer material over a long period of time.
Since it is kept in close contact, it has excellent durability.

Further, since the wire insertion portion is covered with the transparent resin layer, the inspector can easily visually inspect the appearance of this portion, which is convenient for maintenance and inspection.
In particular, since the display layer is inserted between the inner and outer layer materials, the rope type and usage history can be identified at a glance.

[0018]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. With reference to FIG. 3, a procedure of the knitting process of the wire end portion (cutting or roughing) will be described. In this embodiment, 2
The case of the folding knitting of the 19th article will be described.

In the drawing, the rope A to be inserted is shown on the left, and the rope B to be inserted is shown on the right. Each strand of the rope A to be inserted is represented by circle numbers 1 to 6, and each strand of the rope B to be inserted is represented by a lowercase letter a.
-E. It should be noted that in the figure, the encircled kanji "heart" corresponds to the cords of the ropes A and B, respectively.

The wire rope 11 is formed by twisting six side strands around the core rope, and unwinds the rope A, which is the terminal end thereof, by a predetermined length to separate the strands 1 to 6 and the core rope, respectively. .

First, the strand 1 of the rope A is connected to the rope B
And between the strands f and a of the rope B through the right side of the cord. Similarly, rope A
Is inserted between the strands c and d of the rope B, passed through the right side of the cord, and pulled out between the strands a and b of the rope B. Similarly, the strand 3 of the rope A is inserted between the strands c and d of the rope B, passes through the right side of the cord, and is pulled out between the strands b and c of the rope B. Further, the rope of the rope A is inserted into the rope of the rope B from between the strands c and d of the rope B. Next, the strand 4 of the rope A is inserted between the strands d and e of the rope B, and pulled out between the strands c and d of the rope B. Similarly, strand 5 of rope A
Is inserted between the strands e and f of the rope B.
Between the strands d and e. Next, the strand 6 of the rope A is inserted between the strands f and a of the rope B,
Pull out between the strands e and f of the rope B and tighten the respective strands 1 to 6 of the rope A against the rope B (first
Process).

Next, the strand 4 of the rope A is connected to the rope B
And wrap it around the strand d four times. Similarly, connect the strand 5 of the rope A to the rope B
And wrap it around the strand e four times. Similarly, connect the strand 6 of the rope A to the rope B
And then wind around the strand f four times. Similarly, connect the strand 1 of rope A to the rope B
And wrap it around the strand a four times. Similarly, strand A of rope A is connected to rope B
And then wound around the strand b four times. Similarly, connect the strand 3 of the rope A to the rope B
, And wound around the strand c four times (second step to fifth step). At the end of the fourth step, the cord of the rope A is cut.

Further, untwisting of all the strands 1 to 6 of the rope A is unwound, and only the up-twist is wound around the strand d of the rope B only once, leaving the untwist of the strand 4. Similarly, only the upper twist is wound around the strand e of the rope B only once, leaving the lower twist of the strand 5 of the rope A. Similarly, only the upper twist is wound around the strand f of the rope B only once, leaving the lower twist of the strand 6 of the rope A. Similarly, only the upper twist is wound around the strand a of the rope B only once, leaving the lower twist of the strand 1 of the rope A. Similarly, only the upper twist is wound around the strand b of the rope B only once, leaving the lower twist of the strand 2 of the rope A. Similarly, only the upper twist is wound around the strand c of the rope B only once, leaving the lower twist of the strand 3 of the rope A (sixth step).

Further, the strand A of the rope A 5
Only the twist of the strand 4 is wound around the strand d of the rope B only once, leaving 1 and 3. Similarly, only the upper twist of the strand 6 is wound around the strand f of the rope B only once, leaving the strands 5, 1, 3 of the rope A. Finally, only the upper twist of the strand 2 is wound around the strand b of the rope B, leaving the strands 5, 1, and 3 of the rope A, and the processing of the rope terminal is completed.

An ice ply 12 of a desired size is formed on the rope end treated in this manner, and a barbed wire end 14 protrudes from the outer peripheral surface of the wire insertion portion 13 by 3 to 5 mm. ing. Since this is a sharp projection, it is very dangerous for a slinger. The beard-shaped end 14 is easily caught by worker's gloves, clothes, etc.
Since it may cause an unexpected accident, coating treatment is performed as described below.

As shown in FIG. 1, the wire insertion portion 13
After being degreased and washed and sufficiently dried, a resin film 20 having a desired length is wound around the resin film. The resin film 20 may be formed in a tubular shape in advance, or may be formed by winding a sheet.

As shown in FIG. 4, the resin film 20 is a substantially transparent thin film composed of two inner and outer layers in which an outer layer material 20a and an inner layer material 20b are bonded with an adhesive or the like. In this case, identification of rope manufacturing date, type, etc. (not shown)
Is preferably attached to the outer peripheral surface of the inner layer material 20b, so that a worker or an inspector can identify the rope only by visual inspection. Alternatively, the inner layer material 20b and the outer layer material 2
0a may be inserted with a display layer for identification (not shown).

The inner layer material 20b is composed of a heat-shrinkable thin film sheet such as polyolefin, polyvinylidene fluoride, PVC, polypropylene, or polyvinyl chloride, which shrinks when heated, and has a thickness of 0.6 to 1.0 mm. Range.
Various properties of the inner layer material 20b include, for example, a softening temperature of 110 to 1
30 ° C, penetration is 44, water absorption is 0.07 to 0.12
%, Adhesive strength is 6 to 25 (kgf / 25 mm).

The outer layer material 20a is formed of a low water-absorbing thin film sheet such as a polyethylene film, and has a thickness of 0.9.
１．５1.5 mm. Various properties of the outer layer material 20a include, for example, a tensile strength of 250 to 320 kgf / cm ² , an elongation of 490 to 780%, a hardness measured by a Shore hardness meter of 49 (D scale display), and a tear strength of 72 kgf / cm ² .
cm ^2, the dielectric breakdown voltage is 52 (kV / 1.4mm), water absorption 0.01%, water vapor transmission rate of 0.3 (g / m ^2/2
4 hours), the shrinkage is about 52%. The inner layer material 20
The same material as b may be used for the outer layer material 20a and double coated.

Next, the resin film wound around the wire insertion portion 13 is heated to a predetermined temperature. The heating condition performed on site using an electric heater such as a resistance heating heater or a hot gun is, for example, a temperature of 120 ± 10 ° C. For about 3 minutes. The heating conditions performed in the factory using a heating furnace or a heating tank are, for example, kept at an atmosphere temperature of 130 to 180 ° C. for about 3 minutes. By such heating, the resin film shrinks by about 50% in the diameter direction, and as shown in FIG. 2, closely adheres to the wire insertion portion 13 of the rope, and a desired coating resin layer 20 is formed.

Since the obtained coating resin layer 20 completely covers the end portion 14 of the strand having a smooth and sharp angled beard, it is excellent in safety, and even if it is touched with bare hands, the worker is injured. Disappears. Further, since the outer layer material 20a has excellent tear strength and the inner layer material 20b has excellent adhesive strength, it can be used stably without being torn or peeled for a long period of time. Further, since the coating resin layer 20 is transparent, an operator or the like can easily visually inspect the wire insertion portion 13 in appearance.

Next, various embodiments will be described with reference to FIGS. As shown in FIGS. 5 and 6,
In the rope 10 of the type in which the ice plies 12 are formed at both ends of the rope, the two wire insertion portions 13 are covered with the resin coating layers 20 respectively.

The resin coating layer 20 covers not only the wire insertion portion 13 but also the rope portion 11 which has not been braided. By doing so, the resin coating layer 2
A value of 0 makes it possible to freely bend in accordance with the bending of the rope 11, hardly causes local stress concentration, and extends the life. Further, since the wire insertion portion 13 and the rope portion 11 are smoothly continuous, the sling can be easily pulled out from the suspended load without being caught.

Further, since the rope 10 fits exactly along the suspended load due to the flexibility and elasticity of the resin coating layer 20, a stable suspended state can be obtained. Further, since the bending load does not substantially act on the rope at both ends, the wire is not broken, and the life of the rope is extended.

As shown in FIG. 7, the slinging rope 10a
May be covered with the resin coating layer 20a. In this way, when the load 40 is hung by the rope 10a hung on the hook 30, the portion where the rope portion 11 directly contacts the load 40 becomes shorter due to the presence of the intermediate resin coating layer 20a. The life will be extended. In the illustrated example, three intermediate resin coating layers 20a are provided. However, only one central resin coating layer may be provided depending on the length of the sling or the type of load, or two or four resin coating layers may be provided. Good.

As shown in FIG. 8, in the rope 12b, all parts except the ice ply 12 at both ends are covered with the resin coating layer 20.
b. By doing so, the resin coating layer 2
Ob enhances the effect of protecting the rope, and can hang a load of any shape and any size without damaging both the rope and the load.

[0037]

According to the present invention, the inner and outer layer double composite resin
The layer covers the end of the sharp wire in the form of a mustache projecting from the wire insertion portion, and the outer periphery of the rope is smoothed, so that the worker can handle the wire safely without injuries such as cuts. In particular, the outer layer material is made of a material with low water absorption.
Is hard to swell and deteriorate due to moisture.
Good against inner layer material for a long time without falling
It is very durable because it keeps close contact.

Further, since the wire insertion portion is covered with the transparent resin layer, it can be visually inspected, which is convenient for maintenance and inspection. In addition, by attaching the date and type of rope manufacture to the outer peripheral surface of the inner layer material, or by inserting a display layer between the inner layer material and the outer layer material, the worker or inspector can visually check the appearance only. The rope can be easily identified.

[Brief description of the drawings]

FIG. 1 is a view for explaining a wire rope terminal processing method according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining a wire rope terminal processing method according to the embodiment of the present invention.

FIG. 3 Insertion of wire ends (split or stubby)
The figure for demonstrating a procedure.

FIG. 4 is a sectional view showing a protective coating layer.

FIG. 5 is an external view showing a rope formed by the wire rope terminal processing method according to the embodiment of the present invention.

FIG. 6 is a partial cross-sectional view showing a rope formed by the wire rope terminal processing method according to the embodiment of the present invention.

FIG. 7 is an external view showing a slinging rope formed by a wire rope terminal processing method according to another embodiment of the present invention.

FIG. 8 is an external view showing a rope formed by a wire rope terminal processing method according to another embodiment of the present invention.

FIG. 9 is a diagram showing a terminal processing unit of a wire rope.

FIG. 10 is a diagram showing a wire rope terminal unit that has been subjected to terminal processing using a conventional method.

[Explanation of symbols]

10, 10a, 10b: wire rope, 11: rope portion, 12: ice ply, 13: wire insertion portion (split portion), 14: wire end (whisker) 20, 20a, 20b: coating resin layer ( Resin film),
20a: outer layer material, 20b: inner layer material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-165978 (JP, U) JP-A-34-15348 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) D07B 9/00

Claims (5)

(57) [Claims] 1. A wire rope end processing method for loosening the twist of a strand near a rope end, inserting a wire having a loosened rope end into a gap between the loosened strands, and forming an annular ice price. Heat shrinkable
Substantially made by laminating the outer layer material with low water absorption to the inner layer material
Attach a transparent composite resin layer to the wire insertion part
By heating, the inner layer material of the composite resin layer is
Close the wire insertion part, and
A method for treating a wire rope end , comprising coating with a composite resin layer . Wherein said inner layer material is a polyolefin, polyvinylidene fluoride, terminal processing method according to claim 1, wherein the wire rope, characterized in that it consists either of PVC. 3. The outer layer material is made of any one of polyethylene, polypropylene, polyvinyl chloride, polyolefin, polyvinylidene fluoride, and PVC.
The method for processing a terminal of a wire rope according to claim 1 . 4. The terminal processing method according to claim 1, wherein the wire rope display of rope identification, characterized in that subjecting the outer peripheral surface of the inner layer material. 5. The method according to claim 1, further comprising inserting a display layer for identifying the rope between the inner layer material and the outer layer material.
The method for processing a terminal of a wire rope according to claim 1 .