JPS61239067A - Production of string having loop - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a string with a loop for use as a hanging string for fluorescent lamps, a hanging string for window blinds, and the like.

Conventional technology For hanging strings for fluorescent lamps and window blinds, there are two types of strings: - Rings made of metal or plastic are tied to both ends of the string (see Figure 10), and - Both ends of the string are bent into a circle. A loop that is tied to the neck of the loop and fixed with a thread (see Figure 11), ■ Insert the string through a hollow truncated conical knob made of plastic, and then insert the end of the inserted string. It is known that the parts are pulled out and tied together to form a bump (see Figure 12).

Problems to be Solved by the Invention However, in the process of manufacturing such a hanging cord, the tying process (2), the tying process (2), the insertion process (2), and the knot forming process (2) are all done by hand. Because each product is made one by one, it requires manpower to manufacture even though it is a small product, resulting in poor productivity.In addition, each product is highly uneven, and problems such as knots coming undone during product use can occur. Ta.

In view of this situation, the present invention was achieved as a result of intensive research to find a method to omit manual steps as much as possible and to obtain a homogeneous product.

Means for Solving the Problems The method for manufacturing a string having loops according to the present invention includes a step (A) of obtaining a cylindrical woven fabric by bag weaving.

A process of fixing the front and back sides of the fabric obtained in the previous process in a linear or planar manner along the warp running direction while leaving some unbonded parts (
B), and a step (C) of shredding the woven fabric that has undergone the previous step in the weft running direction. By finding a specific manufacturing method using the woven fabric in this way, the above-mentioned method can be achieved. The problems of the conventional system were solved all at once.

The method of the present invention will be explained in detail below.

The first step (A, ) consists of the step of obtaining a cylindrical woven fabric by bag weaving.

The bag weave is a type of warp and warp double weave, and is a method of weaving two overlapping plain weave fabrics by arranging an odd number of warp threads.

According to this method, one weft thread makes two round trips to form one ring shape, and eventually the weft threads proceed in a spiral shape to form a cylindrical shape one after another. A woven structure is obtained. The fabric obtained by bag weaving is seamless and homogeneous.

As the warp and weft, threads made of natural fibers, regenerated fibers, semi-synthetic fibers, synthetic fibers, inorganic fibers, thin metal wires, etc. can be used. It is also possible to use elastic threads, superstretched plastic filaments (for example, polyacetal), and the like.

The process (B) consists of fixing the front and back sides of the fabric obtained in the previous process in a linear or planar manner along the warp running direction while leaving some non-fixed parts.

The front and back sides of the fabric are fixed by means such as sewing with a sewing machine, adhesion by applying or impregnating an adhesive or interposing an adhesive film, or welding by thermal force, high frequency welder, laser edge, etc.

Fastening is done linearly or planarly along the warp running direction.
At this time, a portion where no fixation is performed is left along the warp running direction.

The non-fixed portion (1) and the fixed portion (2) are fixed so that there is at least one each. For example, one end of the fabric is the non-fixed part (1) and the remaining part is the fixed part (2) (1)
/ The configuration of (2), where both ends are non-fixed parts (1) and the center part is a fixed part (2) (], ) / (2) / Including the configuration of (1), (2) / (1 )/ (2), (1)/
(2)/ (1)/(2)/ (1), (1)/ (
2)/ (1)/ (2)/ (1)/ (2)/ (
A configuration such as 1) is adopted.

The 2aΩ9 upper process (C) consists of a process of shredding the fabric that has undergone the previous process in the weft running direction.

As the shredding method, a mechanical slitting method, a heat cutting method using thermal force or a laser beam, etc. are adopted.

In addition, it is desirable to perform resin processing on the woven fabric or shredded material after weaving and before shredding or after shredding. Resin processing makes shredding smooth and prevents fraying from the shredded edges even when slitting is done mechanically, and also adds strength, rigidity, waterproofness, flame retardancy, and waterproofness to the shredded material. This is because wrinkle resistance, stain resistance, etc. are imparted.

When the unattached part (1) of the shredded material is spread out, it becomes a loop, and the fixed part (2) becomes a straight part, so that the desired string with a loop can be obtained.

The string manufactured by the method of the present invention is a fluorescent lamp hanging string,
Window blind hanging strings, near conditioner switching, washing machine drainage switching, bag or handbag handles, paper for securing luggage to the loading platform, connecting strings, binding strings, product display, tools and kitchen utensils. It is useful for a variety of purposes such as hanging clothes, ties, laundry, name tags, etc., and accessories.

Function: In the string obtained by the method of the present invention, the non-fixed part (
The loop made from 1) becomes the locking part, and the hook becomes the part. Objects can also be fastened by fitting a spring-like ring into this loop, or by inserting an object through the string and then passing one end of the string through this loop. Since the string obtained according to the present invention has a structure in which the loop is integrally connected to the string, it can sufficiently withstand tensile force.

Example Next, the present invention will be further explained with reference to Examples.

Example 1 Using nylon multifilament yarn containing low-melting point nylon fibers as the warp and weft yarns, a seamless fabric of 12 c layers with a weave width of 12 c layers was woven by bag weaving among warp and warp double weaves, as shown in the perspective view in Fig. 1. .

Next, this fabric was crimped with a heated roll, leaving 2 cm of both edge ends, and the low melting point nylon fibers were melted to bond the front and back sides of the fabric along the warp running direction. After bonding, the boundary between the bonded portion (bonded portion) and the non-bonded portion was perforated along the warp running direction. As a result, as shown in the perspective view in Figure 2, non-fixed parts (1), (1) are connected to both ends of the fixed part (2) (1)/
/ A fabric having the structure of (1) was obtained. Note that (2a) in the figure is a fixed portion formed by a perforation.

Next, this fabric was heated to 2 mm in the weft running direction.
Shredded into width. After shredding, unattached parts at both ends (1), (1)
When it was unfolded, a 12 cm long string with loops at both ends was obtained, as shown in the plan view in Figure 3 and the front view in Figure 4.

Example 2 A seamless fabric with a weaving width of 50 cm was woven by bag weaving using rayon/acrylic blend fiber yarns for the warp and weft.

Next, this fabric was impregnated in a thermosetting resin solution and squeezed, and adhesive city barriers with a width of 201 m were inserted at both ends and in two places in the center, and the other parts were cured under pressure. Then, as the resin cured, the front and back fabrics were bonded together. As a result, as shown in the perspective view in FIG. A fabric having the following characteristics was obtained.

Next, this fabric was shredded into 3 mm width pieces using a slitter in the weft running direction. After shredding, the fixed parts (1) at both ends (
1) and the non-fixed part (1) in the center were spread out to obtain a 50 cm long string having loops at three places at both ends and in the center as shown in the plan view in FIG.

Examples 3 to 5 Similar to Example 1 or Example 2, a seamless fabric was woven by bag weaving, and then the front and back sides of the fabric were fixed along the warp running direction to form a non-fixed part (1). Fixed part (2
), and then the fabric was cut into pieces in the weft running direction to produce cords with loops as shown in plan views in FIGS. 7 to 9.

Effects of the Invention In the method of the present invention, there is no manual process such as tying a knot or tying with thread as in the past, so productivity is significantly improved and there is no unevenness from product to product.

The string having a loop obtained by the method of the present invention is homogeneous and has sufficient resistance to tensile force because the loop and other parts are seamlessly connected.
The appearance is also favorable. In addition, since the loop does not have a knot, there is no problem with the knot coming undone during product use, unlike conventional products.

In addition, since it is made of woven fabric, it is possible to provide any strength by selecting the materials for the warp and weft, and it is also possible to prevent the string from stretching under tension, meeting the required quality.

On the other hand, if the string is required to stretch under tension, this requirement can be met by selecting the materials of the warp and weft or by selecting the weaving method.

[Brief explanation of drawings]

1 to 4 are explanatory diagrams showing an example of the present invention, and the first
The figure is a perspective view of a fabric woven by hollow weaving, Figure 2 is a perspective view of a fabric with non-fixed parts and fixed parts formed, and Figure 3 shows a string obtained by shredding the fabric shown in Figure 2. The plan view and FIG. 4 are its front views. 5 and 6 are explanatory diagrams showing another example of the present invention,
FIG. 5 is a perspective view of a fabric in which a non-fixed part and a fixed part are formed, and FIG. 6 is a plan view of a string obtained by cutting the fabric shown in FIG. 5 into pieces. 7 to 9 are plan views showing other examples of strings obtained by the present invention. 10 to 12 are plan views showing examples of conventional suspension strings. (1)...Non-fixed part, (2)...Fixed part, (2a)
・・・Fixed part due to perforation

Claims (1)

[Claims] 1. Step (A) of obtaining a cylindrical woven fabric by bag weaving, a step of fixing the front and back sides of the woven fabric obtained in the previous step in a linear or planar shape along the warp running direction while leaving some non-fixed parts ( B),
and a step (C) of shredding the woven fabric that has undergone the previous step in the weft running direction.