Rope, strand, and strand manufacturing method

Abstract

To provide a rope or a strand, which has high production efficiency and high workability and hardly loses shape.SOLUTION: A rope 1 comprises: a rope body 2 formed by twisting three or more strands 4; and a twist stopping yarn 3 for sewing a piece of rope body 2 across whole area of lengthwise direction of the rope body 2 and in parallel with the lengthwise direction of the rope body 2. The rope 1 preferably has flat-shaped cross section. The rope body 2 is preferably formed by twisting three strands 4.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to ropes and strands. [Background technology]

[0002] Conventionally, for example, in seaweed cultivation, a cultivation net and a rope with a diameter of about 6 mm are used to secure the net to a support pole, as shown in Patent Document 1. When using rope, there is a problem of deformation, such as the rope opening in some places, and to prevent this, it is necessary to twist the rope tightly. However, twisting the rope tightly also causes problems such as poor usability and workability.

[0003] Due to these problems, braided cords are often used instead of rope in seaweed farming, but braided cords have problems such as low production efficiency and high costs.

[0004] The applicant proposed the rope of Patent Document 2. Patent Document 2 discloses a rope in which a monofilament thread and a high tenacity thread are inserted into the strand core of a triple-twisted rope.

[0005] However, even the rope of Patent Document 2 is required to have further improvements in production efficiency and workability.

[0006] In addition, for example, thin ropes with a diameter of about 4 to 5 mm, "Kongouchi ropes" are often used for applications such as pitching tents. Although Kongouuchi ropes are easy to work with, they have the problem of low productivity, and there is a demand for ropes with high production efficiency. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-313158 [Patent Document 2] Japanese Patent Application Publication No. 2020-133086 Summary of the Invention [Problem to be solved by the invention]

[0008] Therefore, an object of the present invention is to provide a rope or strand that can be produced efficiently, is resistant to deformation, and is easy to work with. [Means for solving the problem]

[0009] The present invention provides a rope comprising a rope body formed by twisting together three or more strands, and a single twist stop thread that sews together the rope body over the entire length of the rope body and parallel to the length of the rope body.

[0010] Here, "over the entire area" means that substantially the entire area, and specifically means that 80 to 100% of the area relative to the entire length of the rope is sewn with the twist stop thread.

[0011] The rope preferably has a flat cross section.

[0012] The rope body is preferably formed by twisting together three strands.

[0013] The rope body is preferably twisted at a twist pitch that is 10 to 50% longer than that of a straight-twisted rope.

[0014] The rope is preferably used to connect a net sheet used in seaweed cultivation to a support for fixing the net sheet.

[0015] The rope is preferably used for pitching tents.

[0016] The present invention also provides a strand comprising a strand body formed by twisting together a plurality of yarns, and a twist stop thread that stitches together a single strand body over the entire length of the strand body and parallel to the length of the strand body.

[0017] The present invention also provides a rope formed by twisting together a plurality of the strands.

[0018] The present invention also provides a method for manufacturing the strand, comprising the steps of twisting yarns to form a strand body, immersing the strand body in a water-soluble resin and drying it to set the twist, and sewing a twist-setting thread to the strand body after the resin has dried using a sewing machine. [Effects of the Invention]

[0019] According to the present invention, it is possible to provide a rope or strand that can be produced with high production efficiency, is resistant to deformation, and is easy to work with. Because the rope or strand of the present invention has high production efficiency, it can be provided at low cost. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a schematic plan view illustrating a rope according to a first embodiment. [Figure 2] 2 is a cross-sectional view taken along the line XX in FIG. 1. [Figure 3] 1 is a photograph of a rope according to the first embodiment. [Figure 4] FIG. 10 is a schematic plan view illustrating a strand according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0021] A first embodiment of the present invention will be described with reference to FIGS. As shown in Figure 1, the rope 1 comprises a rope body 2 formed by twisting together three strands 4, and a twist stopper thread 3 that sews the rope body 2 along the length of the rope body 2 and fixes the twist of the rope body 2.

[0022] As shown in Fig. 3, each strand 4 constituting the rope body 2 is formed by twisting together a yarn 51, which is an assembly of multiple multifilaments, and a yarn 52, which is an assembly of spun yarns. The average diameter of the strand 4 is 1 to 10 mm, preferably 2 to 5 mm. The average diameter of the rope 1 is 3 to 30 mm, preferably 4 to 10 mm.

[0023] As shown in Figure 1, the twist stop thread 3 is sewn parallel to the length of the rope body 2 at the center in a plan view. The twist stop thread 3 penetrates the rope body 2 from the top to the bottom. The stitches of the twist stop thread 3 are present on both the top and bottom surfaces of the rope 1, but on both sides, they are embedded in the surface of the rope 1, as shown in the photograph in Figure 3. The twist stop thread 3 partially sews all the strands 4 together while they are twisted together, fixing the twist. The stitching is preferably performed by machine sewing. As for the suture thread, thread made of polyester fiber is used for both the upper thread and the lower thread, but this is not limited to this.

[0024] The twist stop threads 3 are sewn over the entire length of the rope body 2. Specifically, it is preferable that 80 to 100% of the entire length of the rope body 2 is sewn with the twist stop threads 3. The twist stop threads 3 are sewn to one rope body 2 with straight stitches. To ensure that the twist is fixed reliably, the stitches of the twist stop threads 3 are preferably shorter than the length L (see FIG. 1) obtained by dividing the twist pitch P by the number of twists (3 in this embodiment).

[0025] As shown in Figure 2, the rope 1 preferably has a flat cross section. After forming the rope body 2, the flat rope 1 is obtained by sewing while pressing with a sewing machine presser foot. If the cross section is approximately elliptical, the major diameter D1 of the rope 1 is preferably 5 to 15 mm, and the minor diameter D2 of the rope 1 is preferably 3 to 12 mm. A twist stop thread 3 is present in the center of the major diameter D1. Because the rope 1 has a flat cross section, it fits comfortably in the hand and is easy to work with.

[0026] The rope 1 is not limited to a triple-stranded rope, but may be formed by twisting together a plurality of strands, 3 or more and 8 or less.

[0027] According to the present invention, the twist is firmly fixed throughout the rope 1, and even if it is not a hard twist, it does not lose its shape during use and is easy to work with. It also has higher production efficiency than braided cords. Furthermore, even with a loosely braided rope, a rope is formed that does not lose its shape during use, which has the advantage of increasing tensile strength and being inexpensive. It is preferable for the loosely braided rope to have strands twisted together at a twist pitch that is 10 to 50% longer than that of a regular braided rope.

[0028] In this embodiment, the strand 4 has a diameter of 2 to 5 mm and a twist pitch P of 20 to 30 mm. The twist pitch P is preferably 2.5 times or more, more preferably 3.0 times or more, and even more preferably 3.2 times or more, the minor axis D2 of the rope 1 cross section.

[0029] The rope 1 of the present invention is manufactured by twisting a plurality of yarns together to form strands 4, twisting the plurality of strands 4 together to form the rope body 2, and then sewing the twist stop threads 3 in a straight line parallel to the longitudinal direction of the rope body 2 using a sewing machine.

[0030] Rope 1 according to the present invention is preferably used, for example, in pole-type seaweed cultivation. Pole-type seaweed cultivation is carried out in relatively shallow waters, with poles driven into the sand and strip-shaped nets tied to the poles. Rope 1 according to the present invention can be used to connect the poles and the net. When used in seaweed cultivation, rope 1 preferably has an average diameter (in the case of a flat rope, the average value of the major diameter D1 and minor diameter D2) of 6 to 15 mm. Rope 1 according to the present invention is a regular braid or loosely braided rope, and therefore has higher tensile strength and workability as well as higher production efficiency than tightly twisted ropes.

[0031] Another application of the rope 1 according to the present invention is tent pitching. For example, the rope 1 is used to join iron pipes and tent sheets. When used for tent pitching, the average diameter of the rope 1 is preferably 3 to 5 mm. While maintaining high workability, it is more economical, with higher production efficiency and lower costs than the kongouuchi ropes that are currently widely used.

[0032] Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is characterized in that a twist stop thread 13 is sewn to the strand body 12.

[0033] The strand 11 comprises a strand body 12 formed by twisting together a plurality of yarns 14, and a twist fixing thread 13 for sewing the strand body 12 along the length direction of the strand body 12 and fixing the twist of the strand body 12.

[0034] The strand 11 can be used alone, but can also be twisted together to form a rope. The diameter of the strand 11 is preferably 3 to 6 mm, and more preferably 4 to 5 mm. It is also preferable that the cross section of the strand 11 is flat. It is also preferable that the strands are loosely twisted, that is, twisted at a twist pitch 10 to 50% longer than that of a straight twist.

[0035] Since the strand 11 is one-sidedly twisted (left-handed in most cases), it is prone to kinking, and if a kink occurs, the strength of that part will decrease. However, the presence of the twist-stopping yarn 13 makes kinking less likely to occur, suppresses deformation, and improves workability.

[0036] The twist-stop thread 13 used to sew the strand body 12 is preferably made of, for example, polyester fiber, and the twist-stop thread 13 is preferably sewn to the strand body 12 by sewing. Because the strand body 12 is one-twisted, it cannot be sewn as is, so it is preferably fixed by attaching a water-soluble resin to prevent false twisting before sewing. Even if the water-soluble resin dissolves during use, for example, by immersing in water, the twist is reliably fixed by the twist-stop thread 13.

[0037] The manufacturing method of the strand 11 will be described. First, the yarns 14 are twisted together to form the strand body 12. Then, the strand body 12 is immersed in a water-soluble resin and then dried to fix the twist (false twist fixing process). Then, a twist fixing thread 13 is sewn to the strand body 12 using a sewing machine.

[0038] The embodiments of the present invention are not limited to the above-described embodiments, and modifications can be made without departing from the technical concept of the present invention. These modifications, equivalents, etc. are also included in the technical scope of the present invention, and it goes without saying that various forms can be adopted as long as they fall within the technical scope. [Explanation of symbols]

[0039] 1: Rope 2: Rope body 3, 13: Twist stop thread 4, 11: Strand 12: Strand body 14: Yarn D1: Major diameter D2: Minor diameter P: twist pitch

Claims

1. a rope body formed by twisting together three or more strands; A twist stop yarn that stitches the rope body over the entire length of the rope body and in parallel with the length of the rope body; Equipped with a rope.

2. The rope has a flat cross section.

2. The rope of claim 1.

3. The rope body is formed by twisting three of the strands together.

3. The rope according to claim 1 or 2.

4. The rope body is twisted at a twist pitch that is 10 to 50% longer than that of a straight-twist rope.

3. The rope according to claim 1 or 2.

5. It is used to connect a net sheet used in seaweed cultivation with a support for fixing the net sheet.

3. The rope according to claim 1 or 2.

6. Used for pitching tents 3. The rope according to claim 1 or 2.

7. a strand body formed by twisting together a plurality of yarns; a twist stop thread that stitches together one strand body over the entire length of the strand body and in parallel with the length of the strand body; A strand comprising:

8. A rope formed by twisting together a plurality of strands according to claim 7.

9. A method for manufacturing a strand according to claim 7, comprising: twisting the yarns together to form a strand body; a false twist fixing step of immersing the strand body in a water-soluble resin and drying it; a step of sewing a twist fixing thread to the strand body after the resin has dried using a sewing machine; A method for manufacturing a strand, comprising:

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