Manufacturing method of single-rope woven eight-strand flexible joint-free rope loop

Abstract

The invention provides a manufacturing method of a single-rope woven eight-strand flexible joint-free rope loop, and relates to the technical field of flexible joint-free rope loop manufacturing. Comprising the steps that a single high-strength fiber rope body is selected as a raw material, the rope bodies on the two sides intersect to form an initial ring, an end A and an end B are twisted and woven in the S twisting direction to form two S rope twisting rings, the end A and the end B are twisted and woven in the S twisting direction to form four S rope twisting rings, and the four S rope twisting rings are divided into two sets of parallel strands; the end A and the end B are symmetrically inserted in the gaps of the two groups of parallel strands in a four-picking and four-pressing manner, and the end A and the end B are continuously and symmetrically inserted in the gaps of the two groups of parallel strands in the four-picking and four-pressing manner; in the manual weaving process, the eight strands of ropes can be tightly attached through a reasonable rope pulling and routing mode, the structure is stable, the situation of loosening or twisting is not prone to occurring, and the reliability of the rope loop in the using process is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of flexible seamless rope loop manufacturing technology, and in particular to a method for manufacturing a single-rope braided eight-strand flexible seamless rope loop. Background Technology

[0002] A rope loop typically refers to a ring-shaped structure made of rope or similar materials (such as nylon, hemp rope, cotton thread, etc.). Currently, most eight-strand rope loops are made using a multi-strand interlocking process, where multiple rope strands are overlapped and interlocked to form the loop. However, this process has significant drawbacks:

[0003] 1. The cross-compression of the rope strands at the braiding point causes a 20%-30% loss in strength and creates "hard spots" that affect flexibility;

[0004] 2. It is essentially an lap joint, which cannot achieve a truly seamless closed loop. It has insufficient fatigue resistance and is prone to breakage at the joint under dynamic stress.

[0005] 3: Some jointless rope loops are formed by weaving multiple ropes together, but there are still problems such as weak strength at the joint and complicated process.

[0006] Existing single-rope weaving techniques are mostly used in small jewelry items such as bracelets. They employ a simple cross-winding method, which cannot form a high-strength eight-strand cable loop. Furthermore, the loop is prone to loosening and uneven stress after formation, making it unsuitable for applications requiring high strength, flexibility, and seamless performance, such as lifting rings, circular traction ropes, marine mooring systems, and shipboard equipment. Therefore, this invention proposes a method for manufacturing a single-rope weaving eight-strand flexible, seamless rope loop to address these problems. Summary of the Invention

[0007] To address the aforementioned issues, this invention proposes a method for manufacturing a single-rope braided eight-strand flexible jointless rope loop. During the manual braiding process, by employing reasonable thread pulling and routing methods, the eight strands of rope can be tightly bonded together, resulting in a stable structure that is less prone to loosening or twisting, thus ensuring the reliability of the rope loop during use.

[0008] To achieve the objectives of this invention, the invention is implemented through the following technical solutions:

[0009] A method for manufacturing a single-rope braided eight-strand flexible jointless rope loop includes the following steps:

[0010] Step 1: Raw material preparation

[0011] The rope is made of a single high-strength fiber. The diameter of the rope is selected according to the specifications of the target rope loop, and the length of the rope is 10 times the circumference of the target rope loop.

[0012] Step 2: Initial Ring Forming

[0013] Using the middle of a single rope as a reference point, the two ropes intersect to form an initial loop, and the diameter of the initial loop is controlled to be 1.2 times the inner diameter of the target rope loop;

[0014] Step 3: Twist and braid two strands of rope into loops.

[0015] Mark the ropes on both sides of the initial loop as end A and end B. Twist and weave ends A and B in an "S" twist direction to form two "S" twisted rope loops.

[0016] Step 4: Twist and braid 4 strands of rope into loops

[0017] Based on the rope loop obtained in step three, twist and braid ends A and B in an "S" twist direction to form a 4-strand "S" twist rope loop;

[0018] Step 5: Insert and braid 6-strand rope loops

[0019] Divide the 4 “S” twisted rope loops obtained in step four into 2 groups of parallel strands. The A end and the B end are symmetrically inserted into the gaps between the 2 groups of parallel strands along the twisting direction using the “pick 4 and press 4” method to form a 6-strand rope.

[0020] Step Six: Making the Rope

[0021] Based on the 6-strand rope obtained in step 5, ends A and B continue to be symmetrically interwoven in the gaps between the two sets of parallel strands using a "pick 4, press 4" method to form an eight-strand rope loop with 2 pairs of "S" twisted strands and 2 pairs of "Z" twisted strands.

[0022] A further improvement is that the rope of a single high-strength fiber in step one is an ultra-high molecular weight polyethylene fiber rope, a polyester fiber rope, or a nylon fiber rope.

[0023] A further improvement is made in the following: In step three, when ends A and B are twisted and woven in an "S" twist direction to form two "S" twisted rope loops, the number of twists at ends A and B is controlled to be an even number, and the twist angle and force at ends A and B are controlled to be consistent.

[0024] A further improvement is made in step three: after each turn of the twist of ends A and B, the rope is tightened evenly by hand along the circumference of the loop to ensure that there are no gaps between the strands and to form a tightly structured two-strand "S" twisted rope loop.

[0025] A further improvement is made in the following: In step four, when ends A and B are twisted and woven in an "S" twist direction to form four "S" twisted rope loops, the number of twists at ends A and B is controlled to be an even number, and the twist angle and force at ends A and B are controlled to be consistent.

[0026] A further improvement is made in step four: after each twist of ends A and B, the rope loop is tightened evenly by hand along its circumference to ensure that there are no gaps between the strands and to form a tightly packed 4-strand "S" twisted rope loop.

[0027] Further improvements are made in the following: In step five, when ends A and B are symmetrically interwoven in the gaps between the two sets of parallel strands using the "pick 4, press 4" method along the twisting direction, it is ensured that the force is uniform and consistent during the interweaving. During the process, the rope is tightened evenly by hand along the circumference to ensure that there are no gaps between the strands.

[0028] A further improvement is that when ends A and B are symmetrically interlaced in the two sets of parallel strand gaps using the "pick 4, press 4" method in step six, the interlacing path is parallel to the interlacing path in step five.

[0029] A further improvement is made in the following step: when obtaining an eight-strand rope loop with two pairs of "S" twisted strands and two pairs of "Z" twisted strands in step six, the two pairs of "S" twisted strands and the two pairs of "Z" twisted strands are alternately twisted. After twisting to the target circumference, the ends of A and B are inserted into the rope loop through the weaving gap to obtain an eight-strand flexible jointless rope loop.

[0030] Further improvements are made in the following aspects: the tension fluctuation range of the twisting process in step six is ​​controlled to be ≤±10N, and the circumference error of the target rope loop is controlled to be ≤±2%.

[0031] The beneficial effects of the present invention are as follows: The rope loop of the present invention is woven from a single rope in one piece, and the load is evenly distributed on the eight strands of rope, which can greatly improve the load-bearing performance of the rope loop. The eight-strand flexible weaving structure of the rope loop makes the rope loop have good flexibility, which can adapt to various complex bending and winding scenarios, and is not prone to stiffness or breakage. It is suitable for occasions that require frequent bending or have high requirements for flexibility.

[0032] The eight-strand flexible jointless rope loop of this invention, through reasonable thread pulling and routing during manual weaving, ensures a tight fit between the eight strands, resulting in a stable structure that is less prone to loosening or twisting, thus guaranteeing the reliability of the rope loop during use. The jointless design of this invention's eight-strand flexible jointless rope loop makes the rope loop surface smooth and flat, without any abrupt joints or knots. This not only makes it aesthetically pleasing but also reduces the risk of damage caused by friction or snagging, extending the rope loop's service life.

[0033] The eight-strand flexible jointless rope loop of this invention avoids the safety hazards caused by breakage at the joint due to the absence of joints, thus improving the safety of use. In some scenarios with high safety requirements, such as hoisting heavy objects and high-altitude operations, the single-rope woven eight-strand flexible jointless rope loop can provide more reliable protection. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the method flow of the present invention;

[0035] Figure 2 This is a schematic diagram of the raw material (rope) structure in step one of the method of the present invention;

[0036] Figure 3 This is a schematic diagram of the initial ring forming state in step two of the method of the present invention;

[0037] Figure 4 This is a schematic diagram of the state of the two "S" twisted rope loops in step three of the method of the present invention;

[0038] Figure 5 This is a schematic diagram of the state of the four "S" twisted rope loops in step four of the method of the present invention;

[0039] Figure 6 This is a schematic diagram of the state of the 6-strand rope in step five of the method of the present invention;

[0040] Figure 7 This is a schematic diagram of the weaving state at end A in step six of the method of the present invention;

[0041] Figure 8 This is a schematic diagram of the weaving state at end B in step six of the present invention;

[0042] Figure 9 This is a schematic diagram of an eight-strand rope loop structure with two pairs of "S" twisted strands and two pairs of "Z" twisted strands in step six of the method of the present invention. Detailed Implementation

[0043] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0044] Example 1

[0045] according to Figure 1-9 As shown, this embodiment provides a method for manufacturing a single-rope braided eight-strand flexible jointless rope loop, producing an eight-strand rope loop with an inner diameter of 200mm for use in lifting rings:

[0046] Step 1: Raw material preparation

[0047] 1) Rope material: Ultra-high molecular weight polyethylene (UHMWPE) fiber rope;

[0048] 2) Rope diameter: 6mm;

[0049] 3) Rope length: 10 times the target rope loop circumference (approximately 628 mm), which is approximately 6.28 m;

[0050] 4) Target rope loop inner diameter: 200mm.

[0051] Step 2: Initial Ring Forming

[0052] Using the middle of a single rope as a reference point, the two ropes intersect to form an initial loop, with the initial loop diameter set at 240mm (1.2 times the target inner diameter).

[0053] Step 3: Twist and braid two strands of rope into loops.

[0054] Mark the ropes on both sides of the initial loop as end A and end B. Twist and weave ends A and B in an "S" twist direction to form two "S" twisted rope loops. Twist 10 times, keeping the twist angle consistent. After each twist, tighten the rope loop evenly by hand along the circumference to ensure there are no gaps between the rope strands.

[0055] Step 4: Twist and braid 4 strands of rope into loops

[0056] Based on the rope loop obtained in step three, twist and weave ends A and B in an "S" twist direction to form a 4-strand "S" twist rope loop with 10 twists. Maintain uniform tension during the process, and the rope loop structure will be tight after tightening.

[0057] Step 5: Insert and braid 6-strand rope loops

[0058] Divide the 4 "S" twisted rope loops obtained in step four into 2 groups of parallel strands (2 strands in each group). Insert the A end and the B end symmetrically into the gaps between the 2 groups of parallel strands along the twist direction using the "pick 4, press 4" method. Keep the insertion paths of the A end and the B end symmetrical. After insertion, a 6-strand rope is formed. Keep the force uniform during insertion and tighten it again after insertion.

[0059] Step Six: Making the Rope

[0060] Based on the 6-strand rope obtained in step five, ends A and B continue to be symmetrically interwoven in the gaps between the two sets of parallel strands using a "pick 4, press 4" method, ensuring that the interwoven path is parallel to the interwoven path in step five, forming an eight-strand rope loop with 2 pairs of "S" twisted strands and 2 pairs of "Z" twisted strands. When the rope loop is twisted to the target circumference (approximately 628mm), the ends of ends A and B are inserted into the rope loop through the weaving gaps, resulting in an eight-strand flexible jointless rope loop.

[0061] Traditionally, eight-strand rope loops with a 22mm diameter are made using a splicing method, requiring a splicing length of 30 times the rope diameter (660mm) to ensure strength. This invention produces eight-strand, jointless rope loops with a 22mm diameter, breaking the circumference limitation and allowing for strength adjustment by varying the single-strand winding density, achieving a flexible fit of high strength for small circumference.

[0062] Example 2

[0063] according to Figure 1-9 As shown, this embodiment provides a method for manufacturing a single-rope braided eight-strand flexible jointless rope loop, producing an eight-strand rope loop with an inner diameter of 1000mm for use as a circular traction rope:

[0064] Step 1: Raw material preparation

[0065] 1) Rope material: Polyester fiber rope;

[0066] 2) Rope diameter: 4mm;

[0067] 3) Rope length: 10 times the target rope loop circumference (approximately 3140mm), i.e., approximately 31.4m;

[0068] 4) Target rope loop inner diameter: 1000mm.

[0069] Step 2: Initial Ring Forming

[0070] Using the middle of a single rope as a reference point, the two ropes intersect to form an initial loop, with the diameter of the initial loop set at 1200mm (1.2 times the target inner diameter).

[0071] Step 3: Twist and braid two strands of rope into loops.

[0072] Mark the ropes on both sides of the initial loop as end A and end B. Twist and weave ends A and B in an "S" twist direction to form two "S" twisted rope loops. The number of twists is 50, and the twist angle is kept consistent. After each twist, tighten the rope loop evenly by hand along the circumference to ensure that there are no gaps between the rope strands.

[0073] Step 4: Twist and braid 4 strands of rope into loops

[0074] Based on the rope loop obtained in step three, twist and braid ends A and B in an "S" twist direction to form a 4-strand "S" twist rope loop. The number of twists is 50, and the twist angle is kept consistent. After each twist, tighten the rope loop evenly by hand along the circumference to ensure that there are no gaps between the strands.

[0075] Step 5: Insert and braid 6-strand rope loops

[0076] Divide the 4 "S" twisted rope loops obtained in step four into 2 groups of parallel strands (2 strands in each group). Insert the A end and the B end symmetrically into the gaps between the 2 groups of parallel strands along the twist direction using the "pick 4, press 4" method. Keep the insertion paths of the A end and the B end symmetrical. After insertion, a 6-strand rope is formed. Keep the force uniform during insertion and tighten it again after insertion.

[0077] Step Six: Making the Rope

[0078] Based on the 6-strand rope obtained in step five, ends A and B continue to be symmetrically interwoven in the gaps between the two sets of parallel strands using a "pick 4, press 4" method, ensuring that the interwoven path is parallel to the interwoven path in step five, forming an eight-strand rope loop with 2 pairs of "S" twisted strands and 2 pairs of "Z" twisted strands. When the rope loop is twisted to the target circumference (approximately 3140mm), the ends of ends A and B are inserted into the rope loop through the weaving gaps, resulting in an eight-strand flexible jointless rope loop.

[0079] To verify the superiority of the rope loop produced by the method of the present invention, a performance comparison test was conducted on the polyester eight-strand rope loop produced in Example 2 and the traditional interlocked eight-strand rope loop. The results are shown in Table 1 below:

[0080] Table 1

[0081]

[0082] As shown in Table 1 above, the eight-strand flexible seamless rope loop produced by the method of the present invention has a strength retention rate of over 92% due to the use of single-strand integrated weaving and the absence of joints weakening the rope loop; the rope loop has a small bending radius, which is suitable for complex working conditions; and the rope strands are locked together by alternating "S twist" and "Z twist", making them less prone to loosening.

[0083] The rope loop of the present invention is woven from a single rope in one piece, and the load is evenly distributed on the eight strands of rope, which can greatly improve the load-bearing capacity of the rope loop. The eight-strand flexible weaving structure of the rope loop gives it good flexibility, which can adapt to various complex bending and winding scenarios and is not prone to stiffness or breakage. It is suitable for occasions that require frequent bending or have high flexibility requirements.

[0084] The eight-strand flexible jointless rope loop of this invention, through reasonable thread pulling and routing during manual weaving, ensures a tight fit between the eight strands, resulting in a stable structure that is less prone to loosening or twisting, thus guaranteeing the reliability of the rope loop during use. The jointless design of this invention's eight-strand flexible jointless rope loop makes the rope loop surface smooth and flat, without any abrupt joints or knots. This not only makes it aesthetically pleasing but also reduces the risk of damage caused by friction or snagging, extending the rope loop's service life.

[0085] The eight-strand flexible jointless rope loop of this invention avoids the safety hazards caused by breakage at the joint due to the absence of joints, thus improving the safety of use. In some scenarios with high safety requirements, such as hoisting heavy objects and high-altitude operations, the single-rope woven eight-strand flexible jointless rope loop can provide more reliable protection.

[0086] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for manufacturing a single-rope braided eight-strand flexible jointless rope loop, characterized in that, Includes the following steps: Step 1: Raw material preparation The rope is made of a single high-strength fiber. The diameter of the rope is selected according to the specifications of the target rope loop, and the length of the rope is 10 times the circumference of the target rope loop. Step 2: Initial Ring Forming Using the middle of a single rope as a reference point, the two ropes intersect to form an initial loop, and the diameter of the initial loop is controlled to be 1.2 times the inner diameter of the target rope loop; Step 3: Twist and braid two strands of rope into loops. Mark the ropes on both sides of the initial loop as end A and end B. Twist and weave ends A and B in an "S" twist direction to form two "S" twisted rope loops. Step 4: Twist and braid 4 strands of rope into loops Based on the rope loop obtained in step three, twist and braid ends A and B in an "S" twist direction to form a 4-strand "S" twist rope loop; Step 5: Insert and braid 6-strand rope loops Divide the 4 "S" twisted rope loops obtained in step four into 2 groups of parallel strands. The A end and the B end are symmetrically inserted into the gaps between the 2 groups of parallel strands along the twisting direction using the "pick 4 and press 4" method to form a 6-strand rope. Step Six: Making the Rope Based on the 6-strand rope obtained in step 5, ends A and B are symmetrically interwoven in the gaps between the two sets of parallel strands using a "pick 4, press 4" method to form an eight-strand rope loop with 2 pairs of "S" twisted strands and 2 pairs of "Z" twisted strands.

2. The method for manufacturing a single-rope braided eight-strand flexible jointless rope loop according to claim 1, characterized in that: In step one, the rope made of a single high-strength fiber is an ultra-high molecular weight polyethylene fiber rope, a polyester fiber rope, or a nylon fiber rope.

3. The method for manufacturing a single-rope braided eight-strand flexible jointless rope loop according to claim 1, characterized in that: In step three, when ends A and B are twisted and woven in an "S" twist direction to form two "S" twisted rope loops, the number of twists at ends A and B should be controlled to be an even number, and the twist angle and force at ends A and B should be kept consistent.

4. The method for manufacturing a single-rope braided eight-strand flexible jointless rope loop according to claim 3, characterized in that: In step three, after each twist of ends A and B, tighten the rope evenly by hand along the circumference of the loop to ensure there are no gaps between the strands and form a tightly structured two-strand "S" twisted rope loop.

5. The method for manufacturing a single-rope braided eight-strand flexible jointless rope loop according to claim 1, characterized in that: In step four, when ends A and B are twisted and woven in an "S" twist direction to form four "S" twisted rope loops, the number of twists at ends A and B should be controlled to be an even number, and the twist angle and force at ends A and B should be kept consistent.

6. The method for manufacturing a single-rope braided eight-strand flexible jointless rope loop according to claim 5, characterized in that: In step four, after each twist of ends A and B, tighten the rope evenly by hand along the circumference of the loop to ensure there are no gaps between the strands and form a tightly structured 4-strand "S" twisted rope loop.

7. The method for manufacturing a single-rope braided eight-strand flexible jointless rope loop according to claim 1, characterized in that: In step five, when ends A and B are symmetrically interwoven in the gaps between the two sets of parallel strands along the twisting direction using the "pick 4, press 4" method, ensure that the force is uniform and consistent during interwoven movements. During the process, tighten the rope evenly along the circumference by hand to ensure that there are no gaps between the strands.

8. The method for manufacturing a single-rope braided eight-strand flexible jointless rope loop according to claim 7, characterized in that: In step six, when ends A and B are symmetrically interlaced in the two sets of parallel cross-sections using the "pick 4, press 4" method, the interlacing path is parallel to the interlacing path in step five.

9. The method for manufacturing a single-rope braided eight-strand flexible jointless rope loop according to claim 8, characterized in that: In step six, when an eight-strand rope loop with two pairs of "S" twisted strands and two pairs of "Z" twisted strands is obtained, the two pairs of "S" twisted strands and the two pairs of "Z" twisted strands are alternately twisted. After twisting to the target circumference, the ends of A and B are inserted into the rope loop through the weaving gap to obtain an eight-strand flexible jointless rope loop.

10. The method for manufacturing a single-rope braided eight-strand flexible jointless rope loop according to claim 9, characterized in that: In step six, the tension fluctuation range of the twisting process is controlled to be ≤±10N, and the circumference error of the target rope loop is controlled to be ≤±2%.

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