JP2511905Y2 - Sling - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sling in which an endless core material formed by winding a twisted yarn in a skein shape is covered with a tubular fabric.

[0002]

2. Description of the Related Art Conventionally, as a sling, there is a sling in which an endless core material in which a twisted yarn is wound in a skein shape is covered with a tubular woven fabric. This type of sling has a flexible tubular woven fabric for covering and a core material that is flexible throughout the sling, and is more compatible with the shape of the suspended object than a so-called belt sling and can realize a stable suspended state. For this reason, it has been prized as a sling for slinging work.

However, since the conventional sling in which the core material is covered with the tubular fabric easily absorbs and holds the liquid, the liquid (water or oil) held in a tension state such as when the suspended object is suspended is released. However, there is a problem that the suspended body and the floor are soiled. Besides, in the conventional sling, not only liquid but also fine dust passes through the tubular fabric, enters the core material, and rubs against the filament yarn (original yarn) that composes the twisted yarn during use. There is also a problem that the strength of the sling gradually decreases because it causes damage.

[0004]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention, while maintaining the flexibility of the sling itself, reduces the sling strength due to the contamination of the suspended body or floor due to the release of the holding liquid and the rubbing of invading dust. It is an object to provide a sling that can solve both problems.

[0005]

In order to solve the above problems, the sling according to the present invention is an endless type sling in which an endless core material formed by winding a twisted yarn in a skein shape is covered with a tubular woven fabric. If an intermediate or a structure in which a coating of a rubber or elastomer at least the rear surface of the front and back surfaces of the tubular fabric is applied, or the endless core made by winding a shape skein of twisted lines together asked In the case of an eye-type sling in which the part is covered with a tubular woven fabric and is unified, and both ends of the core material are ring-shaped and covered with the tubular woven fabric to form an eye part, the intermediate portion is formed. At least the back and front surfaces of the tubular woven fabric that covers the eye portion and the eye portion are coated with rubber or elastomer.

The endless type sling and the double-ended eye type sling according to the present invention (hereinafter collectively referred to as "sling") will be described in detail with reference to the drawings. In the sling of this invention, as the core material, as shown in FIG.
As shown in Fig. 3, the endless core material 1 in which the twisted yarn is wound in a skein shape is used. A twisted yarn is used as the core material because if the core material is made by winding the raw yarn without twisting it, the yarn is likely to be loosened and is difficult to handle.

As the twisted yarn for the core material, usually 10 to 40 raw yarns of polyester, nylon (polyamide), polypropylene or the like, and a twist number of 3.0 to 10.0 T / 3
A sweet twist level of about 0 cm is used. The number of times the twisted yarn is wound around one core material varies depending on, for example, the required strength of the sling and is not limited to a particular number, but it is usually in the range of 20 to 100 times, and sometimes 1000 times. May reach.

In the sling of the present invention, the core material is covered with a tubular fabric. In the case of the endless type sling, as shown in FIG. 2, the entire core material 1 is covered with one tubular fabric 2. In the case of the double-ended eye type sling, as shown in FIG. 3, the endless type core material 1 is used. The intermediate portions of the cores 1 are covered with the tubular fabric 12 to be unified, and both ends of the core material 1 are formed into a ring shape and covered with the tubular fabric 13 to form an eye portion. That is, in the case of a double-sided eye type sling,
The eye portion of the core material 1 is covered with the tubular woven fabrics 13 and 13, and the remaining intermediate portions are gathered together and covered with the tubular woven fabric 12 different from the tubular woven fabric 13. Tubular fabric 13,
Both ends of 13 respectively slightly enter the inside of the tubular fabric 12.

The extremely characteristic feature of the sling according to the present invention is that, as shown in FIG.
(In the case of FIG. 1 backside only) at least the rear surface of the front and back surfaces of 2,13 is that the coating 4 of a rubber or elastomer is applied to. This coating, but it may also be applied to both sides of the front and back.

The rubber or elastomer coating 4 is provided to prevent liquid or fine dust from entering between the twisted yarns 11 of the core material 1. The rubber used for coating may be latex or the like, and the elastomer may be polyamide elastomer, polyester elastomer or the like. Specific examples of the coating with rubber or elastomer include a single coating of only rubber, a single coating of only elastomer, a laminated coating of rubber and elastomer, a coating of mixture of rubber and elastomer. And so on. The thickness of the coating varies depending on the type and thickness of the tubular fabric, but is usually 0.1
The range is about mm to 0.4 mm. The best way to apply the coating is usually to pull in an elastomer tube coated with an adhesive in a tubular fabric and send hot air at 60 to 100 ° C. to expand the elastomer tube to adhere it to the fabric.

The tubular fabric may be coated by, for example, wrapping the core material with a flat fabric coated with rubber or an elastomer and sewing it along the longitudinal direction, or by using an inner surface of the tubular fabric. Alternatively, it can be realized by coating the outer surface with rubber or an elastomer and then winding the thread to form the core material.

[0012]

In the sling according to the present invention, at least the back and front surfaces of the tubular fabric are coated with rubber or elastomer, so that liquid and dust cannot pass through the tubular fabric, and There will be no retained liquid or mixed dust. In this way, if there is no liquid retained in the core material, the liquid will not be released during the use of the sling, so that the suspended body is prevented from being soiled and the floor is contaminated. If the dust disappears, it is natural that the dust and the filament yarn do not rub against each other during the use of the sling, so that the sling strength is prevented from lowering. However, the coating is tubular
A sling is in use if applied only to the surface of the fabric
The coating on the surface of the tubular fabric
Frictional contact with the body makes it easy to wear and tear. Co
If the tings are worn or damaged, liquids or dust
Can no longer be prevented. Back of tubular fabric
The coating on the surface protects the outside with tubular fabric
Are exposed to excessive friction and external force.
Good function over a long period of time
It

Since the rubber or elastomer coating has sufficient elasticity, the sling itself can be sufficiently kept flexible without impairing the softness of the bag-shaped woven fabric. Moreover, since the coating is also reinforced with a tubular fabric as a base material, there is no problem of breakage of the coating.

It is conceivable that the core material may be wrapped with a film and sealed instead of coating the bag-shaped woven fabric with rubber or elastomer, but it is not practical because of the following disadvantages. . The first disadvantage is that it is difficult and time-consuming to wrap the endless core material with a thin film and perform sealing up to sufficiently prevent liquid from entering. Actual manufacturing is very difficult.

The second disadvantage is that the wound film portion is easily broken. A thin film is used to prevent the softness of the core material from being impaired, but unlike the case of coating, the film is weak because it is not lined, and the sling is handled strongly when hanging the suspended object, and strong force is applied to the film. When added, the film will be torn, or the film will be unwound and destroyed.

As described above, the method of winding the core material with a film and sealing the core material has problems in production and performance and is not practical.

[0017]

EXAMPLE Next, an example of the sling of the present invention will be described. Of course, this invention is not limited to the following embodiments. -Example 1-The sling of Example 1 has an endless structure shown in FIG.

The core material 1 of the sling of Example 1 is 20 polyester yarns of the original yarn, which are twisted with a twist number of 5 to 6/30 cm. The number of times the twisted yarn is wound around the core material is
It is 40 times and the diameter is about 20 mm. The longitudinal dimension of the core material 1 is 3000 mm. On the other hand, the tubular woven fabric 2 is made of a nylon thread which is a synthetic fiber, and the inner surface of which is coated with a polyamide elastomer with a thickness of 0.3 mm.

Example 2 The sling of Example 2 has the same construction as that of Example 1, except that the tubular fabric 2 has the polyamide elastomer coating on both sides. -Example 3-The sling of Example 3 has a double-ended eye type configuration shown in FIG.

The core material 1 of the sling of Example 3 is 20 polyester yarns of the original yarn, which are twisted with a twist number of 5 to 6/30 cm. The number of times the twisted yarn is wound around the core material is
It is 40 times and the diameter is about 20 mm. The longitudinal dimension of the core material 1 is 3000 mm. On the other hand, tubular fabrics 12, 1
No. 3 is made of a nylon thread which is a synthetic fiber, and the inner surface of which is coated with a polyamide elastomer with a thickness of 0.3 mm.

Example 4-The sling of Example 4 has the same construction as in Example 3, except that the polyamide elastomer coating on the tubular fabrics 12, 13 is on both sides. The steel plate as the suspended object in the water was suspended many times by the slings of Examples 1 to 4, and each sling was held by the water well familiar to the suspended object invading the bag-shaped tube. I fully confirmed that there is no problem.

[0022]

In the sling according to the present invention, the liquid retained in the core material disappears due to the coating of the rubber or the elastomer provided on at least the back surface of the tubular fabric, and the liquid is discharged during the use of the sling. Since there is no longer, it is possible to avoid stains on the suspended body and dirt on the floor,
Since there is no mixed dust and there is no friction between the dust and filament yarn during use of the sling, a decrease in strength of the sling is avoided, and in addition, the rubber or elastomer coating has sufficient elasticity, so the coating Even if it is applied, the flexibility of the sling itself is sufficiently maintained without impairing the softness of the bag-like woven fabric, and thus the usefulness of the sling of the present invention can be said to be remarkable.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a cross section of the sling of the present invention is taken in a direction orthogonal to the longitudinal direction.

FIG. 2 is an explanatory view showing an example of an endless sling of the present invention.

FIG. 3 is an explanatory view showing an example of a double-ended eye type sling of the present invention.

FIG. 4 is an explanatory view showing an example of a core material used for the sling of the present invention.

[Explanation of symbols]

 1 core material 2 tubular fabric 4 coating with rubber or elastomer 11 twisted yarn 12 tubular fabric 13 tubular fabric

Claims (2)

(57) [Scope of utility model registration request] 1. A formed by winding a shape skein of yarn endless core is coated with the tubular fabric endless type sling, at least the rubber if the comb on the back surface of the front and back surfaces of the tubular fabric by elastomer An endless sling that features a coating. 2. An end portion of an endless core formed by winding a twisted yarn in a skein shape is put together to form a single unit by being covered with a tubular woven fabric, and both ends of the core are ring-shaped. In an eye-shaped sling that is an eye part covered with a tubular fabric, at least the back surface of the tubular fabric that covers the intermediate part and the eye part is coated with rubber or an elastomer. Eye-shaped sling that does.