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The stranded wire design with thick and thin outer layer wires and intermediate materials stabilizes the shape, enhancing quality and reducing costs by maintaining flexibility and pliability while minimizing insulating material usage.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- SANSHUDENSEN
- Filing Date
- 2025-10-07
- Publication Date
- 2026-05-26
AI Technical Summary
The shape of conventional stranded conductors is unstable due to the outer layer strands falling into the voids formed by the inner layer, leading to a deterioration in quality.
A stranded wire design with thick and thin outer layer wires arranged circumferentially, where thick outer layer wires are spaced apart, and thin outer layer wires are placed between them, with intermediate materials in the voids to stabilize the shape, ensuring the centers of thick outer layer wires align with the inner layer wires and the stranded wire's center.
The design stabilizes the shape of the stranded wire, maintaining physical properties like flexibility and pliability, reduces insulating material usage, and allows for a smoother outer surface, thereby improving quality and reducing costs.
Smart Images
Figure 0007865655000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a stranded wire.
Background Art
[0002] In the wire market, from the viewpoints of miniaturization, weight reduction, and high functionality of wires and cables, as shown in FIG. 5, with one central strand 101 as the core, six strands 102 surround the periphery thereof to form an inner layer 103, and further, twelve strands 104 surround the outer periphery thereof to form an outer layer 105, a stranded conductor 110 has been proposed.
Summary of the Invention
Problems to be Solved by the Invention
[0003] In the above-described stranded conductor 110, the strands 104 constituting the outer layer 105 fall into the void 107 in the outer valley formed by the strands 102, 102 that constitute the inner layer 103, and the shape of the stranded conductor 110 is unstable, which may lead to a deterioration in quality.
[0004] Therefore, an object of the present invention is to provide a stranded wire whose shape can be stabilized more than the above-described conventional technology.
Means for Solving the Problems
[0005] In order to solve the above problems, the invention of the present application provides a plurality of thick outer layer wires, an outer layer composed of thinner and a plurality of thin outer layer wires, and an inner layer formed by arranging a plurality of inner layer wires in the circumferential direction inside the outer layer A stranded wire having, The thick outer layer wires are arranged spaced apart in the circumferential direction, and one thin outer layer wire is arranged between adjacent thick outer layer wires in the circumferential direction to form the outer layer. The number of the thick outer layer wires, the number of the thin outer layer wires, and the number of the inner layer wires are the same. The centers of the thick outer layer wires are arranged so as to be located on a straight line passing through the center of the stranded wire and the centers of the inner layer wires constituting the inner layer. Multiple intermediate materials are placed within a void enclosed by an inner valley formed by the outer surface of one small outer layer line and the outer surfaces of two adjacent large outer layer lines, and an outer valley formed by the outer surfaces of circumferentially adjacent inner layer lines. The stranded wire is characterized in that each intermediate material is in contact with the inner valley and / or outer valley portions.
[0008] Furthermore, two first intermediate materials are arranged so as to abut against the inner valley portion formed by the outer surface of one small outer layer line and the outer surfaces of two large outer layer lines located on either side of it. A second intermediate material is placed in contact with the outer valley portion, which is formed by adjacent inner layer lines in the circumferential direction. The second intermediate material may be arranged so as to abut against the inner valley portion of the first intermediate material, which is composed of the two first intermediate materials.
[0009] Furthermore, the distance from the center of the stranded wire to the outermost edge of the large-diameter outer layer wire, and the distance from the center of the stranded wire to the outermost edge of the small-diameter outer layer wire constituting the outer layer are same It may be set to one.
[0010] Furthermore, it is very good if the number of the aforementioned large-diameter outer layer lines is five or more. [Effects of the Invention]
[0013] According to the present invention, the conductor has an outer layer composed of multiple large-diameter outer layer wires and multiple small-diameter outer layer wires that are thinner than the large-diameter outer layer wires, and an inner layer composed of multiple inner layer wires arranged circumferentially inside the outer layer. The large-diameter outer layer wires are arranged spaced apart circumferentially, and one small-diameter outer layer wire is arranged between adjacent large-diameter outer layer wires in the circumferential direction to constitute the outer layer. Multiple intermediate materials are arranged in the void enclosed by the inner and outer valleys. The intermediate materials prevent the small-diameter outer layer wires constituting the outer layer from falling into the void, thereby stabilizing the shape of the stranded wires and improving quality compared to the conventional stranded conductor described above. [Brief explanation of the drawing]
[0014] [Figure 1]Cross-sectional view of stranded wire according to Embodiment 1 of the present invention. [Figure 2] A cross-sectional view of an example of stranded wire according to Embodiment 3 of the present invention. [Figure 3] A cross-sectional view of another example of stranded wire according to Embodiment 3 of the present invention. [Figure 4] A cross-sectional view of another example of stranded wire according to Embodiment 3 of the present invention. [Figure 5] Cross-sectional view of conventional stranded wire. [Modes for carrying out the invention]
[0015] Embodiments for carrying out the present invention will be described with reference to the drawings. The stranded wire of the present invention can be used as a medical wire such as a stranded conductor used in electric wires, cables, etc., a catheter tube used in treatment, a guide wire that passes through blood vessels, and a wire for operating endoscopes, etc.
[0016] [Example 1] Figure 1 is a cross-sectional view of stranded wire 1 according to Embodiment 1 of the present invention, cut in a direction perpendicular to the axial direction. The diagonal lines indicating the cross-section of each strand have been omitted to avoid clutter in the figure.
[0017] As shown in Figure 1, the stranded wire 1 is composed of a center line 2, an inner layer 3 provided outside the center line 2, and an outer layer 4 provided outside the inner layer 3.
[0018] The inner layer 3 is composed of five inner layer lines 11, and the outer layer 4 is composed of five large outer layer lines 12 and five small outer layer lines 13.
[0019] Stranded wire 1 is composed of four types of strands 2, 11, 12, and 13, and all strands 2, 11, 12, and 13 are configured to be twisted in the same direction.
[0020] When the twisted wire 1 is used as a twisted wire conductor, as the wire materials for the base of each strand 2, 11, 12, 13, for example, copper wires such as bare copper wire, oxygen-free copper wire, linear crystal oxygen-free copper wire, single crystal high purity oxygen-free copper wire, etc., those obtained by plating tin, nickel, silver, etc. on this copper wire, aluminum wire, various alloy wires, and insulated coated ones such as enameled wire, litz wire, formal wire, etc. can be used.
[0021] When the twisted wire 1 is used as a medical wire, as the wire materials for the base of each strand 2, 11, 12, 13, for example, hard copper wire, alloy wire, nickel wire, stainless steel wire, titanium wire, etc. can be used.
[0022] The materials of each strand 2, 11, 12, 13 may be the same or different.
[0023] The diameter d2 of the inner layer wire 11 is set larger than the diameter d1 of the center wire 2. As shown in FIG. 1, five inner layer wires 11 are arranged in the circumferential direction outside the center wire 2 to form a circumferential inner layer 3.
[0024] The adjacent inner layer wires 11, 11 in the circumferential direction are arranged so as to contact in the entire axial direction or a part of the axial direction. Also, the inner layer wire 11 and the center wire 2 are arranged so as to contact in the entire axial direction or a part of the axial direction.
[0025] The diameter d3 of the thick outer layer wire 12 is thicker than the diameter d4 of the thin outer layer wire 13, and the diameter d4 of the thin outer layer wire 13 is thicker than the diameter d2 of the inner layer wire 11. As shown in FIG. 1, the thick outer layer wires 12 are arranged at intervals in the circumferential direction, and one thin outer layer wire 13 is arranged between the adjacent thick outer layer wires 12, 12 in the circumferential direction to form an outer layer 4. The number of thick outer layer wires 12 and the number of thin outer layer wires 13 are each composed of the same five as the number of inner layer wires 11.
[0026] As shown in FIG. 1, the thick outer layer wire 12 is arranged so that its center is located on a straight line passing through the center of the center wire 2, that is, the center of the twisted wire 1 and the center of the inner layer wire 11.
[0027] A void 17 is formed, enclosed by an inner valley 15, which is composed of the outer surface of one small outer layer line 13 and the outer surfaces of two large outer layer lines 12, 12 located on either side of it, and an outer valley 16, which is composed of the outer surfaces of two adjacent inner layer lines 11, 11 in the circumferential direction.
[0028] Within the void 17, two first intermediate members 18, 18 are arranged in the circumferential direction so as to abut the inner valley 15 in the entire axial direction or in part thereof, and one second intermediate member 19 is arranged in the outer valley 16 so as to abut it in the entire axial direction or in part thereof. Furthermore, one second intermediate member 19 is arranged so as to abut the inner valley 20 of the first intermediate members, which is formed by the outer surfaces of adjacent first intermediate members 18, 18, in the entire axial direction or in part thereof.
[0029] The wires constituting the intermediate materials 18 and 19 can be made of any material other than electrical conductors such as hard copper wire, alloy wire, nickel wire, stainless steel wire, and titanium wire, such as resin materials and insulating materials. However, it is preferable to use materials that are softer than the wires constituting the individual strands 2, 11, 12, and 13, such as resin materials, insulating materials, or fibrous materials, which have flexibility.
[0030] Furthermore, the number of intermediate members arranged within the void 17 can be arbitrarily set to more than three, as long as a portion of any of the intermediate members abuts the inner valley 15 and the outer valley 16 in the entire axial direction, or in a portion of the axial direction.
[0031] In this embodiment 1, the diameter of the first intermediate material 18 is d5, and the diameter of the second intermediate material 19 is d6. The following relationships were used for each strand 2, 11, 12, 13 and the intermediate materials 18, 19: d1 = 0.70 × d2, d3 = 1.46 × d2, d4 = 1.20 × d2, d5 = 0.52 × d2, d6 = 0.28 × d2.
[0032] The cross-sectional shape of the stranded wire 1 is approximately circular, meaning that the distance L1 from the center A of the stranded wire 1 to the outermost edge B of each large-diameter outer layer wire 12 constituting the outer layer 4 and the distance L2 to the outermost edge C of each small-diameter outer layer wire 13 are approximately the same.
[0033] Because the stranded wire 1 of the present invention has the above-described structure, it provides the following functions and effects.
[0034] The outer shape of the stranded wire 1 can be made approximately circular without compression, and the individual strands 2, 11, 12, and 13 can contact all adjacent strands 2, 11, 12, and 13. Furthermore, the outer shape of the stranded wire 1 can be made approximately circular without compression.
[0035] By making the outer shape of stranded wire 1 nearly circular without compression, each individual wire 2, 11, 12, and 13 can maintain its physical properties such as elongation characteristics, flexibility, and pliability without any loss of those properties. Therefore, stranded wire 1 can be made of highly reliable quality and can be effectively utilized in fields such as automotive wires, acoustic wires, and medical wires.
[0036] The intermediate materials 18 and 19 suppress the circumferential movement of the thick outer layer wires 12 and thin outer layer wires 13 that constitute the outer layer 4, preventing the thin outer layer wires 13 from falling into the void 17. This stabilizes the shape of the stranded wire 1 compared to the conventional stranded conductor described above, and improves the quality of the stranded wire 1.
[0037] By constructing the intermediate materials 18 and 19 from components that are softer and more flexible than the individual wires 2, 11, 12, and 13, the physical properties such as flexibility and pliability can be further improved.
[0038] By making the outer shape of the stranded wire 1 approximately circular without compression, the outer surface can be made smooth, and the thickness of the insulating material coating on the outer circumference of the stranded wire 1 can be made thinner and more uniform, thereby reducing the amount of insulating material used and lowering costs.
[0039] Furthermore, the number of intermediate members arranged within the void 17 can be arbitrarily set to more than three, as long as a portion of any of the intermediate members abuts the inner valley 15 and the outer valley 16 in the entire axial direction, or in a portion of the axial direction.
[0040] Furthermore, center line 2 does not need to be provided.
[0041] [Example 2] If an arrangement similar to that of the stranded wire 1 in Example 1 can be formed, the stranded wire 1 can be constructed using strands of any diameter, as long as the diameter d3 of the thick outer layer wire 12 is thicker than the diameter d4 of the thin outer layer wire 13, in addition to the strands having the diameters described in Example 1. Furthermore, the outer layer 4, which is the outermost layer in the stranded wire 1, may be compressed from the outside using a compression die or the like. A low compression ratio is required to stably form the stranded wire 1.
[0042] This compression compresses and deforms the outer periphery of the thick outer layer wire 12 and thin outer layer wire 13 that constitute the outer layer 4, making the outer shape of the stranded wire 1 closer to a perfect circle. Compression using a compression die or the like may be performed when manufacturing the stranded wire 1 or after manufacturing the stranded wire 1. The compression ratio can be set arbitrarily, but even with a compression ratio lower than that of the conventional technology described above, the stranded wire 1 can be formed in a stable shape.
[0043] The other structures are the same as in Example 1 above, so their description will be omitted.
[0044] In this embodiment 2, the same effects and advantages as in embodiment 1 can be achieved.
[0045] [Example 3] In the above embodiments 1 and 2, the stranded wire 1 was composed of five inner layer wires 11, five thick outer layer wires 12, and five thin outer layer wires 13. However, if the number of inner layer wires 11, thick outer layer wires 12, and thin outer layer wires 13 is the same, the number of strands 2, 11, 12, and 13 can be set to any number as long as there are three or more strands.
[0046] The individual wires 2, 11, 12, and 13 and the intermediate materials 18 and 19 are arranged in the same regularity as in Examples 1 and 2 described above.
[0047] For example, as shown in Figure 2, even in the case of a stranded wire 21 composed of six inner layer wires 11, six large-diameter outer layer wires 12, and six small-diameter outer layer wires 13, the cross-sectional shape of the stranded wire 21 can be made approximately circular with no compression or a low compression ratio, as shown in Figure 2.
[0048] For example, as shown in Figure 3, even in the case of a stranded wire 31 composed of seven inner layer wires 11, seven large-diameter outer layer wires 12, and seven small-diameter outer layer wires 13, the cross-sectional shape of the stranded wire 31 can be made approximately circular with no compression or a low compression ratio, as shown in Figure 3.
[0049] For example, as shown in Figure 4, even in the case of a stranded wire 41 composed of eight inner layer wires 11, eight large-diameter outer layer wires 12, and eight small-diameter outer layer wires 13, the cross-sectional shape of the stranded wire 41 can be made approximately circular with no compression or a low compression ratio, as shown in Figure 4.
[0050] The other structures are the same as those in Examples 1 and 2 above, so their description will be omitted.
[0051] In this embodiment 3, the same effects and advantages as in embodiments 1 and 2 can be achieved. [Explanation of Symbols]
[0052] 1,21,31,41 stranded wire 3. Inner layer 4 Outer layer 11 Inner Layer Line 12 Thick diameter outer layer wire 13 Small diameter outer layer wire 15. Inner valley area 16 Outer valley section 17 Cavity 18. First Intermediate Material 19. Second Intermediate Material 20. Inner valley section of the first intermediate material
Claims
1. A stranded wire having multiple large-diameter outer layer wires, an outer layer composed of multiple small-diameter outer layer wires that are thinner than the large-diameter outer layer wires, and an inner layer formed by arranging multiple inner layer wires circumferentially inside the outer layer, The aforementioned large-diameter outer layer lines are arranged spaced apart in the circumferential direction, and one small-diameter outer layer line is arranged between adjacent large-diameter outer layer lines in the circumferential direction to constitute the outer layer. The number of large outer layer lines, the number of small outer layer lines, and the number of inner layer lines are made the same. The center of the aforementioned large-diameter outer layer wire is positioned on a straight line passing through the center of the aforementioned stranded wire and the center of the inner layer wires that constitute the inner layer. Multiple intermediate materials are placed within a void enclosed by an inner valley formed by the outer surface of one small outer layer line and the outer surfaces of two adjacent large outer layer lines, and an outer valley formed by the outer surfaces of circumferentially adjacent inner layer lines. A stranded wire characterized in that each intermediate material is in contact with the inner valley and / or outer valley portion.
2. Two first intermediate materials are arranged so as to abut against the inner valley portion formed by the outer surface of one small outer layer line and the outer surfaces of two large outer layer lines located on either side of it. A second intermediate material is placed in contact with the outer valley portion, which is formed by adjacent inner layer lines in the circumferential direction. The stranded wire according to claim 1, characterized in that the second intermediate material is arranged to abut against the inner valley portion of the first intermediate material, which is composed of the two first intermediate materials.
3. The stranded wire according to claim 1 or 2, characterized in that the distance from the center of the stranded wire to the outermost edge of the large-diameter outer layer wire is the same as the distance from the center of the stranded wire to the outermost edge of the small-diameter outer layer wire constituting the outer layer.
4. The stranded wire according to claim 1 or 2, characterized in that the number of thick outer layer wires is five or more.