JPS5911993Y2 - endless sling - Google Patents

Description

[Detailed description of the invention] This invention relates to an endless sling used as a hanging cord for sling work.

Endless slings, which are made by wrapping an endless core material made by winding thread multiple times in a cylindrical bag made of flexible material such as cloth, are conveniently used as hanging cords for sling work. .

Even in such a sling, it is unavoidable that the core material is damaged, such as fuzzing or yarn breakage, so it is desirable to inspect the core material.

However, in conventional bags, the ends of the bags were joined by sewing, and it was extremely troublesome to release the connections and rejoin them.

Therefore, in the past, with regard to endless slings, the core material was not inspected at all, and at most the extent of damage to the bag body was checked.

However, as observed by the inventor, damage occurs faster in the core material.

Therefore, it is very dangerous to look only at the damage to the bag without inspecting the core material.

Conventional endless slings leave room for such a risk to occur due to the use of sewing to join the ends of the bag without any consideration of release.

This invention was devised in view of these circumstances, and provides an endless sling in which the bag ends are joined in a joining structure that is easy to join and release.

The endless sling according to this invention is an endless sling in which an endless core material consisting entirely or mostly of warp threads is wrapped in a cylindrical bag made of a flexible material, and the ends of the bag can be joined or released. It is characterized by being joined by an easy joining structure.

This invention will be explained in detail below with reference to drawings showing embodiments thereof.

FIG. 1 shows an endless sling 1 according to this invention.

This endless sling consists of an endless core material 2, 5 as shown in FIG. 2 or 3, and a cylindrical bag 3 made of a flexible material such as cloth or sheet material. It is wrapped as shown.

The core materials 2, 5 are wrapped in bags before or after the two ends are joined.

The endless core material 2 shown in FIG. 2 has both ends 2a, 2
b has a woven structure, and the other part 2C is a material made of a group of threads aligned in the length direction, that is, a bundle of warp threads, and is joined by overlapping the woven structure parts at both ends and performing sewing process 4. .

As the warp yarns, untwisted or lightly twisted yarns made of composite fibers such as polyamide, polyester, and polypropylene are usually used.

For example, it is made by gently twisting three or more yarns of 840 to 1260 D.

As is well known, weaving is carried out by plain weaving or twill weaving using weft threads.

Leno thread can also be used if necessary. In short, it is carried out in accordance with the known method of making a belt.

The material of the weft thread is usually the same as that of the warp thread.

The material and thickness can be changed as needed.

Weaving may be added to areas other than the ends.

However, it is kept to the minimum necessary.

The endless core material 4 shown in FIG. 3 consists of one or more skeins in which a thread corresponding to a warp thread is wound many times and both ends are connected by a knot 6.

The bag 3 may have a seam along its length by sewing or the like, or may be seamless.

As shown in Fig. 1, the bag 3 has an end joint 3a (however,
(not limited to one location).

In this invention, the bag end joint 3a has a joint structure that is easy to join and release, as exemplified below.

That is, as shown in FIG. 5, both ends 3b and 3C of the bag 3
A longitudinal cut is made in each to create a tongue-like part, and corresponding elements 7a and 7b of a known hook-and-loop fastener (one famously made by Velcro) are fixed to these parts, and the end of the bag is secured. As shown in FIG. 6, which shows a cross section of the joint, both ends 3b and 3C of the bag are joined together by overlapping each other, or by using double-sided adhesive tape instead of a hook-and-loop fastener.

As shown in FIG. 7, a string 8 may be sewn around one end 3b of the bag 3, and the string 8 may be used to connect the bag.As shown in FIG. An elastic strip 9 such as the above may be inserted, and if necessary, a convex strip-shaped string 10 may be inserted around the other end 3C, and the connection may be made by the drawing force of the elastic strip 9.

The joining structure shown in FIG. 5, in which a hook-and-loop fastener made by planting loops and hooks, mushrooms, etc. on the fabric, is interposed between the ends of the bag is extremely easy to join and release.

In particular, by making a slit in the bag end to fix the hook-and-loop fastener element, it not only becomes easier to connect and release the bag-end joint, but also facilitates the work of fixing the hook-and-loop fastener element.

The circumferential position of the cut is on the bag end 3b side and 3C as shown in the diagram.
If the bag is shifted by about 90 degrees from the sides, the core material will not be exposed through the cut at the bag end joint.

In the endless sling according to this invention, the bag ends are joined by a joining structure that is extremely easy to join and release, making it easy to inspect the core material, which greatly contributes to safer hanging work.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the endless sling according to this invention, Figs. 2 and 3 are perspective views of the endless core material, and Fig. 4 shows how the core material is suspended in the bag. The partially cut away perspective view and FIGS. 5 to 8 are explanatory diagrams of the joint structure of the bag end. DESCRIPTION OF SYMBOLS 1... Endless sling, 2, 5... Endless core material, 3... Bag, 3a... Bag end joint, 3b, 3C
...Bag end, 7a, 7b...Loop fastener element, 8.
... String, 9... Elastic string.

Claims (2)

[Scope of utility model registration request] (1) An endless sling consisting of an endless core material made entirely or mostly of warp threads wrapped in a cylindrical bag made of a flexible material, with the ends of the bag having a joint structure that is easy to join and release. An endless sling characterized by being joined. (2) The endless sling according to claim 1, wherein the joining structure that is easy to join and release is a joining structure in which a hook-and-loop fastener is interposed between the ends of the bag.