JP3325842B2 - Fiber sling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber sling used when a heavy object is suspended and transported.

[0002]

2. Description of the Related Art Conventionally, an endless annular core material obtained by winding a core yarn in a skein shape has been used as a fiber sling used when performing a work of suspending and transporting a heavy object when a fiber sling is used. In order to prevent the core material from being damaged, a material coated with a fabric such as a woven fabric is known.

[0003]

However, in the fiber sling of the above-mentioned type, since the fiber sling is bundled with the core yarn serving as the strength supporting member, a decrease in the strength of the core yarn cannot be confirmed. Even when the core yarn still has strength, when the jacket member is damaged or the like, the safety of the sling strength cannot be confirmed, and the sling is often discarded.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a fiber sling in which a core material obtained by winding a core yarn in an annular shape and bundling it in a skein shape is covered with an outer skin, and is made of the same material as the core yarn. A skein-shaped test yarn for strength confirmation arranged under the same condition is provided so as to be detachable from the core yarn.

[0005] According to the present invention, as described above, the skein-shaped test yarn for strength confirmation arranged under the same material and under the same conditions as the core yarn is provided detachably with respect to the core yarn. A part of the strength confirmation test yarn provided in the inside is taken out of the sling, the strength is confirmed, the useability of the fiber sling is determined, and the remaining strength can be confirmed. Therefore, not only can you easily check the safety of strength as a product of fiber sling, for example,
Even if the outer skin is damaged, the strength is confirmed using a test yarn for strength confirmation, the use of fiber slings is judged, and the remaining strength is confirmed. By repairing the outer skin, the fiber sling can be reused, and an economical and environmentally-friendly fiber sling can be provided. In addition, by performing the above test, the core yarn of an expensive material, such as high-strength fiber, can be effectively used in the long term,
It is particularly important from an economic standpoint and can provide a fiber sling that is also effective in sales strategies.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention relates to a fiber sling in which a core material obtained by winding a core yarn in a ring shape and bundling it in a skein shape is covered with an outer skin. According to the present invention, the skein-shaped test yarn for strength confirmation arranged under the condition is provided so as to be detachable from the core yarn. Since the skein-shaped test yarn for strength confirmation is detachably provided to the core yarn, a part of the test yarn for strength confirmation provided in the fiber sling is taken out of the sling, and the strength is confirmed. Can be used, and the remaining strength can be checked, so that not only can the safety of the strength of the fiber sling as a product be easily checked, but also, for example, a sling whose outer skin has been damaged. Test for strength check By confirming the strength of the fiber sling, determining whether or not the fiber sling can be used, and checking the remaining strength, the product whose strength has been confirmed is not discarded, but it can be reused by repairing the outer skin, making it economical. In addition, it has the effect of providing a fiber sling that is sufficiently considered for the environment. In addition, by conducting the above test, the core yarn of an expensive material, such as high-strength fiber, can be effectively used over a long period of time. It has the effect of providing a good fiber sling.

The invention according to claim 2 is characterized in that a core material obtained by winding a core yarn in an annular shape and bundling it in a skein shape is covered with a protective film, and the outside thereof is further covered with an outer skin. By covering the core with a protective film, the core has an effect of preventing damage and deterioration of the core. The invention according to claim 3 is characterized in that the protective fill and the outer cover have a function of protecting the core yarn from ultraviolet rays, and use a core material that is degenerated to ultraviolet rays such as a core material made of high-strength fiber. Even in this case, it has the effect of preventing deterioration of the core material and enabling long-term use.

According to a fourth aspect of the present invention, the test yarn for confirming the strength is provided between the protective film and the outer cover. According to the present invention, the test yarn for confirming the strength is provided with the protective film. By providing the space between the outer skin and the outer skin, it is possible to open the sewn portion of the outer skin, easily take out the strength confirmation test thread, and perform the strength confirmation test. Claim 5
According to the present invention, the strength confirmation test yarn is provided alongside the core yarn in the protective film according to the present invention. Accordingly, the strength-confirming test yarn can be easily attached, and at the time of the test, only the identified test yarn is taken out, so that the test can be easily performed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a cross-sectional view of the fiber sling of the present invention, FIG. 2 is an external view thereof, FIG. 3 is a cross-sectional view showing a state in which a test yarn for checking the strength of the fiber sling is taken out, and FIG. It is an external view which shows the state which pulls out a test thread.

Hereinafter, the present invention will be described in detail. The fiber sling 1 of the present invention includes an endless annular core material 6 in which the core yarn 2 is wound in an annular shape and bound in a skein shape. FIG. 2 shows the appearance of an annular fiber sling 1 bundled in a skein shape. As the fibers of the core yarn 2, synthetic fiber filaments such as polyester synthetic fibers, polypropylene synthetic fibers, amide fibers, and polyparaphenylin synthetic fibers are used.

The number of windings and the number of bundles of the skein of the core yarn 2 are adjusted according to the required strength of the fiber sling, and the core yarn 2 is skein-shaped in the fiber sling used for suspending heavy objects. A fiber sling having a large number of turns and skeins is used. In order to prevent the fiber sling 1 from being damaged during use, such as cuts of the core material 6, the core material 6 is used for the properties such as the chemical properties and mechanical properties of the core yarn 2 used for the sling, and for its use. Accordingly, the inside of the outer cover 5 is covered with the film 3 satisfying the required characteristics.

In the present invention, the skein-shaped test yarn 4 for checking the strength of the same material and under the same conditions as the core material 6 is provided detachably from the core material 6. The position of the test yarn 4 for confirming the strength in the fiber sling 1 is determined as follows.
May be provided so as to be detachable, or may be provided between the protective film 3 and the outer skin 5.
May be provided in the protective film, and the strength-confirming test thread 4 may be provided with an identification function such as coloring or a mark.

When the test thread 4 for confirming the strength is arranged between the protective film 3 and the outer skin 5, the test thread 4 for confirming the strength is not protected by the protective film 3, and the light rays and the core material 6 in the protective film 3 are more illuminated. In many cases, the deterioration state has progressed due to deterioration due to chemicals or the like. By checking the deterioration state by the strength confirmation test yarn 4, the deterioration state of the core material can be accurately checked while maintaining a certain safety factor. .

Further, by using a black vinyl film and a high-density woven fabric such as a twill weave for the protective film 3 and the outer skin 5 to impart an ultraviolet protection function to these films and the outer skin, deterioration of the core material is further prevented. I can do it. As described above, in the present invention, the strength confirming test yarn 4 is provided in the outer skin 5 so as to be detachable from the core material 6, the test yarn 4 is provided between the protective film 3 and the outer skin 5, and an identification function is provided. By arranging the test yarn 4 side by side with the core yarn 2 in the protective film, the strength confirmation test yarn 4 can be easily taken out or separated, and the strength confirmation test of the fiber sling 1 can be easily performed. By checking the strength safety, even fiber slings that have been conventionally discarded and whose safety has been confirmed by the strength test can be reused.

[0015]

As described above, according to the present invention, the skein-like test yarn for strength confirmation arranged under the same material and under the same conditions as the core yarn is provided detachably with respect to the core yarn. By taking out a part of the test yarn for strength check provided in the sling from the sling and checking the strength, it is possible to judge the use of the fiber sling and check the remaining strength, so as a fiber sling product Not only can you easily check the strength safety of
Even if the sling is damaged in the outer skin, the strength is confirmed with a test yarn for strength confirmation, the use of the fiber sling is judged, and the remaining strength is confirmed. By repairing the outer skin, the fiber sling can be reused, and an economical and environmentally-friendly fiber sling can be provided. In addition, by performing the above test, a core yarn of an expensive material such as high-strength fiber can be effectively used for a long period of time, so that a fiber sling effective in a sales strategy can be provided.

Further, by providing the strength-confirming test yarn between the protective film and the outer skin, the sewing portion of the outer skin is opened, so that the strength-confirming test yarn can be easily taken out. Further, by providing the strength-confirming test thread in the protective film alongside the core thread, the strength-confirming test thread can be easily removed, and at the time of testing, the test can be easily performed by taking out the identified test thread. Can be.

[Brief description of the drawings]

FIG. 1 is a sectional view of a fiber sling of the present invention.

FIG. 2 is an external view of FIG.

FIG. 3 is a cross-sectional view showing a state in which a test yarn for checking the strength of the fiber sling of the present invention is taken out.

FIG. 4 is an external view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fiber sling 2 Core thread 3 Protective film 4 Test thread for strength check 5 Skin 6 Core material

Claims (5)

(57) [Claims] 1. A fiber sling in which a core material obtained by winding a core yarn in an annular shape and bundling it in a skein shape is covered with an outer cover. A fiber sling characterized by being provided detachably with respect to a core yarn. 2. The fiber sling according to claim 1, wherein a core material obtained by winding the core yarn in an annular shape and bundling it in a skein shape is covered with a protective film, and the outside thereof is further covered with an outer skin. 3. The fiber sling according to claim 2, wherein the protective fill and the outer cover have a function of protecting the core yarn from ultraviolet rays. 4. The fiber sling according to claim 2, wherein a strength test yarn is provided between the protective film and the outer cover. 5. The fiber sling according to claim 1, wherein an identification function such as coloring or marking is imparted to the test yarn for strength confirmation.