JP3155633B2 - Seat with reinforced ears - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet used in agriculture, forestry, civil engineering, construction, etc., for preventing falling of materials, curing, wind protection, sand protection and the like.

[0002]

2. Description of the Related Art Conventionally, in the fields of agriculture, forestry, civil engineering, construction, etc., prevention of falling of materials, prevention of scattering of dust and paint, curing,
Various sheets, such as canvas, tarpaulins, or mesh sheets, are used for windproof, sandproof, and the like. Each of these sheets has a structure in which a base material obtained by knitting and weaving a yarn having no fusion property by high frequency or heat treatment is coated with a synthetic resin having fusion property by high frequency or heat treatment. is there.

[0003] For convenience of handling these sheets,
It is manufactured as a unit sheet having a predetermined size, and its ends are double-folded and sewn with a sewing machine for reinforcement, and a metal fitting is formed at a constant pitch as necessary.

[0004] However, the double-folded ends of these sheets are simply sewn with a sewing machine, and their joining strength is not sufficient. Therefore, when used in the above-mentioned applications outdoors, there is a disadvantage that the ears are easily damaged. In particular, in the case of a mesh sheet having a coarse mesh in which yarns are woven, when the ends are turned back and sewn, the density of the yarns of the mesh sheet itself is low, so that the sewing thread is a yarn of the mesh sheet. There is a drawback that the sewing thread is not easily entangled and the sewing thread is easily pulled out, so that the strength of the ear part is insufficient and breakage occurs.

[0005] In addition, there are usually two types of sewing methods, ie, a lockstitch method and a chain stitch method, in which the end is folded back, and the lockstitch method is formed by a group of two or more threads. This is a stitch type in which the yarns of the group are generally laced with other yarns, and the joining strength of the sewn portions is relatively high, but the productivity is poor. On the other hand, the chain stitch method
It is a stitch type characterized by forming a self-thread looping with one or more needle threads, and has higher productivity but lower joint strength at a sewn portion compared with a lockstitch method. For this reason, when sewing the ears of the mesh sheet, there is a problem that the chain stitching method with excellent productivity cannot be adopted.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been reinforced by using a resin-coated thread for sewing the ears of the sheet. It is an object to provide a sheet having a portion.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a base made of a yarn having no fusion property by high frequency or heat treatment, by using a high frequency or heat treatment. It has a lug formed by folding the end of a sheet-like base material coated with a synthetic resin into a double or more, and the lug is formed around a yarn having no fusing property by high frequency or heat treatment. The sheet-like base material and the resin-coated yarn are stitched together by a resin-coated yarn formed by coating a synthetic resin having fusibility by high-frequency or heat treatment, and fused by high-frequency or heat treatment. It is characterized by being integrated.

[0008]

According to the present invention, there is provided a sheet made of a synthetic resin having a high-frequency or heat-processable fusibility around a yarn which does not have a high-frequency or heat-process fusibility with respect to the folded end of the sheet-like base material. After suturing with a resin-coated yarn formed by coating, a high frequency or heat treatment is applied to form a lug portion in which the sheet-shaped base material and the resin-coated yarn are fused and integrated by fusion of a synthetic resin. Since the thread constituting the base material and the resin-coated thread used for suturing are firmly bonded,
The strength of the ears is much better.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Polyester multifilaments (100
Using a yarn of 0 denier and 95 single yarns for the warp and the weft, a mosha weave having a density of 23.4 × 24 (books / 25.4 _mm ) is woven and a coarse base cloth having a base weight of 220 / m ^2. It was created.

The coarse base cloth is coated with a polyvinyl chloride resin at a rate of 210 g / m ² as a synthetic resin having a fusibility by high frequency or heat treatment, and the yarn interval is 1.2 to 1.8.
A sheet-like substrate having a mesh of _mm was formed. The method of coating the polyvinyl chloride resin is formed by attaching to a coarse base fabric as a plastisol and then gelling by heating. .

Using the above-mentioned sheet-like base material, a mesh-like sheet A having reinforced ear portions was prepared as shown in FIG. The reticulated sheet A is formed by folding the end of the sheet-shaped base material 1 with the reinforcing tape 2 interposed therebetween, and the folded portion of the reinforcing tape 2 with the reinforcing rope 3 interposed between the folded portion of the sheet-shaped base material 1 and the resin-coated yarn. After suturing at 4 and performing heat treatment,
It was created by placing the metal fitting 5.

The reinforcing tape 2 is made of a polyester multifilament 250 denier (48 single yarns) having a density of 22 ×
Base fabric woven with 24 (books / 25.4 _mm ) plain weave, coated on both sides with polyvinyl chloride resin.
/ M ² , a polyvinyl chloride resin weight of 356 g / m ² , and a thickness of 0.35 _mm .

As the reinforcing rope 3, a three-ply polypropylene rope having a thickness of 4 _mm was used. The resin-coated yarn 4 is a sewing yarn obtained by coating a polyester # 8 spun yarn with a polyvinyl chloride resin.

The sewing method is a lockstitch method (JIS, L012).
0. Indication symbol 30 by stitch type classification and indication symbol
The folded portion of the sheet-like base material was sewn by two types of 1) and the chain stitching method (the above-mentioned JIS display symbol 102). The fitting 5 was made of brass # 28 having an inner diameter of 12 _mm .

The heat treatment is performed by using a hot air welding machine at a hot air temperature of 600 ° C. and a feed speed of the base fabric of 10 m / min. Then, the polyvinyl chloride resin covering the resin-coated yarn 4 is melted, and the sheet-like base material 1, the reinforcing tape 2 and the resin-coated yarn 4 are fused and integrated with the polyvinyl chloride resin to form the mesh sheet A. Formed.

As a comparative example, a sheet-like base material, a reinforcing tape, a reinforcing rope, a staple, and the like are the same as those in the above-mentioned embodiment, and ordinary polyester # 8 whose sewing thread is not coated with a polyvinyl chloride resin is used. Using a spun yarn, sewing was performed by a lockstitch method (the above-mentioned JIS display symbol 301), and a mesh sheet X was prepared without heat treatment (conventional method).

With regard to the thread change at the time of sewing, in the case of the lockstitch system, the lower thread (# 8 spun thread) can be wound around the bobbin only 20 m, so it is necessary to interrupt the sewing once every 20 m to change the thread. . On the other hand, in the chain stitching method, there is no need to interrupt sewing for thread change, and the productivity is excellent.

The strength of the ears of the mesh sheet A of the above example and the mesh sheet X of the comparative example was measured. Measuring method: Based on the test method specified by the Japan Temporary Industrial Association, the strength of the joint portion in a tensile test was measured for each of five samples, and the average value was calculated to obtain the following results. Sample Strength of stop part Example 1: Reticulated sheet A (final stitching method) 194.0 kg Example 2: Reticulated sheet A (ring stitching method) 178.0 kg Comparative example: Reticulated sheet X (final stitching method) 147.0 kg

As is apparent from the results, the mesh sheet A of the present invention can be used in both the lockstitch method and the chain stitch method.
It shows a much better clamping strength than the comparative example sewn by the lockstitch method as a conventional product. Therefore, according to the present invention, it is possible to use a highly productive chain stitching method for sewing ears, and it is possible to efficiently create a mesh sheet having ears with high strength.

In the above embodiment, when forming the ears of the sheet-like base material 1 in order to improve the strength of the ears of the sheet, the reinforcing tape 2, the reinforcing rope 3, and the metal fitting 5 are used.
However, the sheet of the present invention may form the ear without necessarily using these members.

Further, the position where the reinforcing tape 2 is sewn is not limited to being folded over the end of the sheet-like base material 1 as shown in FIGS.
As shown in FIG. 4, the reinforcing tape 2 may be interposed between the bent end portions of the sheet-like base material 1, and as shown in FIGS. The reinforcing tape 2 may be superimposed on the top and bottom of the part or below the end. Further, as shown in FIG. 7, the reinforcing tape 2 may be put on the outside of the sheet-shaped base material 1 where the end portion is bent and sewn.

[0022]

The sheet of the present invention has ears in which the sheet-like base material and the resin-coated yarn constituting the sheet are fused and integrated by fusion of the synthetic resin, so that the strength of the ears is remarkably excellent. I have. In addition, since high strength can be obtained by using either the lockstitch method or the chain stitch method as the sewing method when suturing the ears, it is possible to sew with the highly productive chain stitch method, and the sewing process. After that, there is an advantage that the production can be efficiently performed only by adding a high frequency or heat treatment step.

[Brief description of the drawings]

FIG. 1 is a perspective view of a mesh sheet showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the mesh sheet of FIG.

FIG. 3 is an explanatory view showing an example of a sewing position of a sheet base material and a reinforcing tape according to the present invention.

FIG. 4 is an explanatory diagram showing an example of a sewing position of a sheet base material and a reinforcing tape according to the present invention.

FIG. 5 is an explanatory diagram showing an example of a sewing position of a sheet base material and a reinforcing tape according to the present invention.

FIG. 6 is an explanatory view showing an example of a sewing position of a sheet base material and a reinforcing tape according to the present invention.

FIG. 7 is an explanatory view showing an example of a sewing position of a sheet base material and a reinforcing tape according to the present invention.

[Explanation of symbols]

 A mesh-like sheet 1 sheet-like substrate 2 reinforcing tape 3 reinforcing rope 4 resin-coated yarn

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D06C 25/00 D05B 35/02 D06C 7/00

Claims (1)

(57) [Claims] 1. An end portion of a sheet-like base material obtained by coating a base material composed of a thread having no fusion property by high frequency or heat treatment with a synthetic resin having fusion property by high frequency or heat treatment. A lug portion formed by folding back more than two times, and the lug portion is coated with a synthetic resin having a fusion property by high frequency or heat treatment around a yarn having no fusion property by high frequency or heat treatment. A reinforced ear portion, which is sewn with a resin-coated thread, and wherein the sheet-shaped substrate and the resin-coated thread are fused and integrated by melting the synthetic resin by high frequency or heat treatment. Having sheet.