WO2019003444A1 - 撚り線 - Google Patents
撚り線 Download PDFInfo
- Publication number
- WO2019003444A1 WO2019003444A1 PCT/JP2017/024254 JP2017024254W WO2019003444A1 WO 2019003444 A1 WO2019003444 A1 WO 2019003444A1 JP 2017024254 W JP2017024254 W JP 2017024254W WO 2019003444 A1 WO2019003444 A1 WO 2019003444A1
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- WIPO (PCT)
- Prior art keywords
- circumferential
- line
- stranded wire
- contact
- circumferential line
- Prior art date
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B5/00—Making ropes or cables from special materials or of particular form
- D07B5/007—Making ropes or cables from special materials or of particular form comprising postformed and thereby radially plastically deformed elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/04—Layered products comprising a layer of synthetic resin as impregnant, bonding, or embedding substance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/08—Several wires or the like stranded in the form of a rope
- H01B5/10—Several wires or the like stranded in the form of a rope stranded around a space, insulating material, or dissimilar conducting material
- H01B5/102—Several wires or the like stranded in the form of a rope stranded around a space, insulating material, or dissimilar conducting material stranded around a high tensile strength core
- H01B5/105—Several wires or the like stranded in the form of a rope stranded around a space, insulating material, or dissimilar conducting material stranded around a high tensile strength core composed of synthetic filaments, e.g. glass-fibres
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0693—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a strand configuration
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/104—Rope or cable structures twisted
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2019—Strands pressed to shape
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2036—Strands characterised by the use of different wires or filaments
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2036—Strands characterised by the use of different wires or filaments
- D07B2201/2037—Strands characterised by the use of different wires or filaments regarding the dimension of the wires or filaments
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2047—Cores
- D07B2201/2052—Cores characterised by their structure
- D07B2201/2059—Cores characterised by their structure comprising wires
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2047—Cores
- D07B2201/2066—Cores characterised by the materials used
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3021—Metals
- D07B2205/3025—Steel
- D07B2205/3046—Steel characterised by the carbon content
- D07B2205/305—Steel characterised by the carbon content having a low carbon content, e.g. below 0,5 percent respectively NT wires
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3021—Metals
- D07B2205/3025—Steel
- D07B2205/3046—Steel characterised by the carbon content
- D07B2205/3057—Steel characterised by the carbon content having a high carbon content, e.g. greater than 0,8 percent respectively SHT or UHT wires
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2207/00—Rope or cable making machines
- D07B2207/40—Machine components
- D07B2207/4072—Means for mechanically reducing serpentining or mechanically killing of rope
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2015—Construction industries
- D07B2501/2023—Concrete enforcements
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
- D07B7/02—Machine details; Auxiliary devices
- D07B7/027—Postforming of ropes or strands
Definitions
- the present invention relates to a stranded wire.
- the stranded wire according to the present invention is a stranded wire in which a plurality of steel wires are twisted together.
- the stranded wire is, in a cross section perpendicular to the longitudinal direction, a centerline which is the steel wire and the steel wire, which are in contact with the centerline and arranged side by side so as to surround the outer periphery of the centerline.
- a first circumferential wire and the steel wire which are in contact with the first circumferential wire and are arranged side by side so as to surround the outer circumferential side of the region where the first circumferential wire is disposed, and more than the center line and the first circumferential line
- a plurality of second circumferential lines having a large yield stress.
- the center line and the first circumferential line are in surface contact.
- the first circumferential line and the second circumferential line are in surface contact.
- FIG. 1 is a schematic perspective view showing the structure of a stranded wire in the first embodiment.
- FIG. 2 is a schematic cross-sectional view showing a cross section perpendicular to the longitudinal direction of the stranded wire in the first embodiment.
- FIG. 3 is a schematic cross-sectional view showing an enlarged contact portion between the center line and the first circumferential line in the cross section perpendicular to the longitudinal direction of the stranded wire.
- FIG. 4 is a schematic cross-sectional view showing an enlarged contact portion between the second circumferential line and the first circumferential line in a cross section perpendicular to the longitudinal direction of the stranded wire.
- FIG. 5 is a diagram for explaining the principle of energy absorption by stranded wires.
- FIG. 5 is a diagram for explaining the principle of energy absorption by stranded wires.
- FIG. 6 is a flowchart showing an outline of a method of manufacturing a stranded wire.
- FIG. 7 is a schematic view for explaining the compression process.
- FIG. 8 is a schematic view for explaining the compression process.
- FIG. 9 is a schematic diagram for explaining an example of the use of a stranded wire.
- FIG. 10 is a schematic perspective view showing the structure of the stranded wire in the second embodiment.
- FIG. 11 is a schematic cross-sectional view showing a cross section perpendicular to the longitudinal direction of the stranded wire in the second embodiment.
- FIG. 12 is a schematic cross-sectional view showing an enlarged contact portion between the center line and the first circumferential line in the cross section perpendicular to the longitudinal direction of the stranded wire.
- FIG. 13 is a schematic cross-sectional view showing an enlarged contact portion between the large diameter second circumferential line and the first circumferential line in the cross section perpendicular to the longitudinal direction of the stranded wire.
- FIG. 14 is a schematic cross-sectional view showing, in an enlarged manner, the contact portion between the small diameter second circumferential line and the first circumferential line in a cross section perpendicular to the longitudinal direction of the stranded wire.
- FIG. 15 is a diagram showing a state of energy absorption by extension and contraction of a stranded wire.
- the amount of energy absorption by expansion and contraction can be increased.
- the stranded wire of the present application is a stranded wire in which a plurality of steel wires are twisted together.
- the stranded wire is, in a cross section perpendicular to the longitudinal direction, a centerline which is the steel wire and the steel wire, which are in contact with the centerline and arranged side by side so as to surround the outer periphery of the centerline.
- a first circumferential wire and the steel wire which are in contact with the first circumferential wire and are arranged side by side so as to surround the outer circumferential side of the region where the first circumferential wire is disposed, and more than the center line and the first circumferential line And a plurality of second circumferential lines having a large yield stress.
- the center line and the first circumferential line are in surface contact.
- the first circumferential line and the second circumferential line are in surface contact.
- the plurality of first circumferential lines may be formed of nine first circumferential lines.
- the plurality of second circumferential lines may be composed of nine second circumferential lines. Such a structure is suitable as the stranded wire structure of the present application.
- the amount of deformation in the radial direction due to the contact with the first circumferential line of the center line may be 0.3 mm or more. This makes it easy to obtain sufficient frictional force between the first circumferential line and the center line. From the viewpoint of further improving the frictional force between the first circumferential line and the center line, the amount of deformation in the radial direction due to the contact with the first circumferential line of the center line may be 0.5 mm or more.
- the amount of deformation in the radial direction due to the contact with the first circumferential line of the center line may be 1.5 mm or less. By doing so, it becomes easy to secure the flexibility of the stranded wire. From the viewpoint of securing the flexibility of the stranded wire more reliably, the amount of deformation in the radial direction due to the contact with the first circumferential line of the center line may be 1.2 mm or less, or may be 1.0 mm or less .
- the amount of deformation in the radial direction due to the contact with the second circumferential line of the first circumferential line may be 0.3 mm or more. By doing so, it becomes easy to obtain a sufficient frictional force between the first circumferential line and the second circumferential line. From the viewpoint of further improving the frictional force between the first circumferential line and the second circumferential line, the deformation amount in the radial direction by the contact with the second circumferential line of the first circumferential line may be 0.5 mm or more .
- the amount of deformation in the radial direction due to the contact with the second circumferential line of the first circumferential line may be 1.5 mm or less. By doing so, it becomes easy to secure the flexibility of the stranded wire. From the viewpoint of securing the flexibility of the stranded wire more reliably, the amount of deformation in the radial direction due to the contact with the second circumferential wire of the first circumferential wire may be 1.2 mm or less, and is 1.0 mm or less It is also good.
- the ratio of the area in contact with the center line among the outer circumferences of the plurality of first circumferential lines may be 5% or more. This makes it easy to obtain sufficient frictional force between the first circumferential line and the center line.
- the ratio of the area in contact with the center line among the outer peripheries of the plurality of first circumferential lines may be 10% or less.
- the ratio of the area in contact with one second circumferential line of the plurality of second circumferential lines among the outer circumferences of the plurality of first circumferential lines is 5 It may be% or more. By doing so, it becomes easy to obtain a sufficient frictional force between the first circumferential line and the second circumferential line.
- the ratio of the area in contact with one second circumferential line among the plurality of second circumferential lines among the respective outer circumferences of the plurality of first circumferential lines is 10% It may be the following. By doing so, it becomes easy to secure the flexibility of the stranded wire.
- the surface roughness Ra of the outer peripheral surface of the center line, the first circumferential line and the second circumferential line may be 0.5 ⁇ m or more. This makes it easy to obtain sufficient frictional force between the first circumferential line and the centerline and the second circumferential line.
- the surface roughness Ra of the outer peripheral surface of the center line, the first circumferential line and the second circumferential line may be 10 ⁇ m or less. By doing so, it becomes easy to obtain a stranded wire of appropriate accuracy.
- the yield stress of the center line and the first circumferential line may be 200 N / mm 2 or more and 600 N / mm 2 or less. By so doing, it becomes easy to absorb energy by causing the center line and the first circumferential line to yield at the time of stretch of the stranded wire. Yield stress of the center line and the first circumferential line may be 350 N / mm 2 or more 450 N / mm 2 or less.
- the yield stress of the second peripheral line may be 1800 N / mm 2 or more 2300N / mm 2 or less. By doing so, it becomes easy to maintain a state in which the second circumferential wire does not yield when the stranded wire extends. Energy absorption due to the expansion and contraction from the viewpoint of further increasing the yield stress of the second peripheral line may be 2200N / mm 2 or more 2300N / mm 2 or less. From the viewpoint of reducing the manufacturing cost of the strand, the yield stress of the second peripheral line may be 1800 N / mm 2 or more 2000N / mm 2 or less.
- the stranded wire 1 in the present embodiment is a stranded wire in which a plurality of steel wires are twisted together.
- the stranded wire 1 has a center line 10, a plurality of (seven in the present embodiment) first circumferential lines 20, and a plurality of (seven embodiments in the present embodiment) in a cross section perpendicular to the longitudinal direction.
- a two-turn line 30 is provided.
- the centerline 10, the first circumferential line 20 and the second circumferential line 30 are all steel wires.
- the cross sections perpendicular to the longitudinal direction of the center line 10, the first circumferential line 20 and the second circumferential line 30 are all circular.
- the diameter of the centerline 10 is larger than the diameter of the first circumferential line 20.
- the diameter of the second circumferential line 30 is larger than the diameter of the first circumferential line 20.
- the diameters of the plurality of first circumferential lines 20 are the same.
- the diameters of the plurality of second circumferential lines 30 are the same.
- the centerline 10 and the first circumferential line 20 are made of the same kind of steel.
- a mild steel wire material specified in JIS G3505 can be adopted.
- a PC steel wire specified in JIS G3536 can be adopted as the second circumferential wire 30.
- first circumferential lines 20 are arranged in a ring so as to be in contact with the outer circumferential surface of the center line 10 and to surround the outer circumferential side of the center line 10.
- Adjacent first circumferential lines 20 are in contact with each other.
- the second circumferential lines 30 are arranged in a ring shape so as to be in contact with the outer circumferential surface of the first circumferential line 20 and to surround the outer circumferential side of the region where the first circumferential line 20 is disposed.
- the adjacent second circumferential lines 30 are in contact with each other.
- the second circumferential line 30 has a higher yield stress than the center line 10 and the first circumferential line 20.
- FIG. 3 is a schematic cross-sectional view showing an enlarged contact portion between the center line 10 and the first circumferential line 20 in a cross section perpendicular to the longitudinal direction of the stranded wire 1.
- FIG. 4 is a schematic cross-sectional view showing an enlarged contact portion between the second circumferential line 30 and the first circumferential line 20 in a cross section perpendicular to the longitudinal direction of the stranded wire 1.
- the outer peripheral surface 10 ⁇ / b> A of the center line 10 and the outer peripheral surface 20 ⁇ / b> A of each first peripheral line 20 are in surface contact.
- the ratio of the area in contact with the center line 10 in the outer circumference of each first circumferential line 20 is 5% or more and 10% or less. That is, the length alpha 2 ratio of with respect to the outer peripheral length of each first circumferential line 20 is 10% or less than 5%.
- the hardness of the outer circumferential surface 20A of the first circumferential line 20 is higher than the hardness of the outer circumferential surface 10A of the center line 10. Therefore, each first circumferential line 20 and the center line 10 are in surface contact with each other so that each first circumferential line 20 is pressed against the center line 10.
- outer peripheral surface 20A of each first peripheral wire 20 and outer peripheral surface 30A of one second peripheral wire 30 are in contact over a length ⁇ 2 doing. That is, the outer circumferential surface 20A of the first circumferential line 20 and the outer circumferential surface 30A of the second circumferential line 30 are in surface contact with each other.
- the ratio of the area in contact with one second circumferential line 30 in the outer circumference of the first circumferential line 20 is 5% or more and 10% or less. That is, the length ratio of the beta 2 with respect to the outer peripheral length of each first circumferential line 20 is 10% or less than 5%.
- the hardness of the outer circumferential surface of the second circumferential line 30 is higher than the hardness of the outer circumferential surface of the first circumferential line 20. Therefore, the second circumferential line 30 and the first circumferential line 20 are in surface contact with each other so that the second circumferential line 30 is pushed into the first circumferential line 20. As a result, the area of the outer circumferential surface 20A of the first circumferential line 20 in contact with the second circumferential line 30 has a concave shape.
- the amount of deformation in the radial direction due to the contact of the first circumferential wire 20 with the second circumferential wire 30 becomes 0.3 mm or more and 1.5 mm or less There is.
- the horizontal axis indicates the elongation in the longitudinal direction of the stranded wire 1
- the vertical axis indicates the tensile load in the longitudinal direction of the stranded wire 1.
- the thin line A indicates the behavior of the center line 10 and the first circumferential line 20.
- the broken line B indicates the behavior of the second circumferential line 30.
- a thick line C indicates the behavior of the entire strand 1.
- both the thin line A and the broken line B are linear. That is, all of the centerline 10, the first circumferential line 20 and the second circumferential line 30 are in a state in which the elongation increases in proportion to the tensile load.
- the tensile load exceeds the yield point of the centerline 10 and the first circumferential line 20
- the elongation of the centerline 10 and the first circumferential line 20 increases with the constant tensile load. Therefore, the thin line A has a region parallel to the horizontal axis.
- the second circumferential line 30 having a higher yield stress than the centerline 10 and the first circumferential line 20 is still in the elastic range.
- the centerline 10 and the first circumferential line 20 repeat the tensile yield and the compressive yield as shown in the loop E.
- the center line 10 and the first circumferential line 20 are surrounded by the second circumferential line 30 having a high yield stress, the buckling of the center line 10 and the first circumferential line 20 is suppressed while the buckling is suppressed.
- compression yield can be repeated.
- the second circumferential line 30 repeats expansion and contraction within the elastic range so as to reciprocate on the broken line B.
- the strand 1 as a whole exhibits behavior along the loop D.
- the energy which makes the twist wire 1 expand-contract is absorbed by the repetition of the tension
- the center line 10 and the first circumferential line 20 are in surface contact, and the first circumferential line 20 and the second circumferential line 20
- the circumferential line 30 is in surface contact. Therefore, the frictional force between the first circumferential line 20 and the centerline 10 and the second circumferential line 30 is increased, and the detachment of the steel wire constituting the stranded wire 1 is suppressed. As a result, the amount of energy absorbed when the stranded wire 1 expands and contracts is large.
- the stranded wire 1 of the present embodiment is a stranded wire capable of increasing the amount of energy absorption by expansion and contraction.
- the surface roughness of the outer peripheral surface of the center line 10, the first circumferential line 20 and the second circumferential line 30 is preferably 0.5 ⁇ m or more in Ra. This makes it easy to obtain sufficient frictional force between the first circumferential line 20 and the centerline 10 and the second circumferential line 30.
- surface roughness of the outer peripheral surface of the centerline 10, the 1st circumferential line 20, and the 2nd circumferential line 30 is 10 micrometers or less by Ra. This makes it easy to obtain the stranded wire 1 with appropriate accuracy.
- the yield stress of the center line 10 and the first circumferential line 20 be 200 N / mm 2 or more and 600 N / mm 2 or less. Thereby, it is easy to make the centerline 10 and the 1st surrounding line 20 yield at the time of expansion-contraction of the strand wire 1, and to absorb energy. Yield stress of the center line 10 and the first peripheral line 20 is more preferably set to 350 N / mm 2 or more 450 N / mm 2 or less.
- the yield stress of the second peripheral line 30 is preferably 1800 N / mm 2 or more 2300N / mm 2 or less. Thereby, it becomes easy to maintain the state which the 2nd perimeter wire 30 does not yield at the time of extension of strand 1.
- the energy absorption by stretching from the viewpoint of further increasing the yield stress of the second peripheral line 30 is preferably set to 2200N / mm 2 or more 2300N / mm 2 or less. From the viewpoint of reducing the manufacturing cost of the strands 1, the yield stress of the second peripheral line 30 is preferably set to 1800 N / mm 2 or more 2000N / mm 2 or less.
- a steel wire preparing step is first performed as a step (S10).
- a centerline 10, a first circumferential line 20 and a second circumferential line 30, which are steel wires having a desired composition and having desired shapes and mechanical properties, are prepared.
- a steel wire made of steel having an appropriate component composition is prepared, and wire drawing is performed as necessary, so that center line 10, first circumferential line 20, and second circumferential line 30 Be prepared.
- a twisting process is implemented as a process (S20).
- the center line 10 the first circumferential line 20 and the second circumferential line 30 prepared in the step (S10) are twisted so as to have the positional relationship described based on FIG. 1 and FIG. .
- FIG. 7 is a schematic plan view of the compression processing apparatus seen from the Z-axis direction perpendicular to the X-axis direction and the Y-axis direction perpendicular to each other.
- FIG. 8 is a schematic plan view of the compression processing apparatus viewed from the Y-axis direction perpendicular to the X-axis direction and the Z-axis direction perpendicular to each other.
- the compression processing device 90 includes a first roller 91, a second roller 92, a third roller 93, and a fourth roller 94.
- the stranded wire 1 obtained in step (S20) is conveyed in the longitudinal direction (X-axis direction) while maintaining a linear shape along arrow ⁇ .
- the first roller 91, the second roller 92, the third roller 93, and the fourth roller 94 are disposed so as to be in contact with the strand 1 conveyed in this manner on the outer peripheral surface.
- first roller 91 and the second roller 92 are disposed on opposite sides of the strand 1 in the radial direction (Z-axis direction) of the strand 1.
- the first rollers 91 and the second rollers 92 are alternately arranged in the X-axis direction.
- the third roller 93 and the fourth roller 94 are disposed downstream of the first roller 91 and the second roller 92.
- the third roller 93 and the fourth roller 94 are disposed on opposite sides of the strand 1 in the radial direction (Y-axis direction) of the strand 1.
- the third roller 93 and the fourth roller 94 are alternately arranged in the X-axis direction.
- the third roller 93 and the fourth roller 94 alternate in the Y-axis direction. Be pressed against.
- the stranded wire 1 is compressed in the Z-axis direction and then compressed in the Y-axis direction.
- the centerline 10 and the first circumferential line 20 are in surface contact
- the first circumferential line 20 and the second circumferential line 30 are in surface contact.
- a tension introducing step is performed as a step (S40).
- this step (S40) tension is applied in the longitudinal direction to the stranded wire 1 on which the step (S30) is performed. Thereby, the stranded wire 1 is stretched.
- the winding step (S60) is performed to complete the stranded wire 1 of the present embodiment.
- the heat treatment in the step (S50) for example, a bluing heat treatment can be performed.
- Stranded wire 1 can be used, for example, in coal mines, as described below. Referring to FIG. 9, in the coal mine 80 in which the coal bed 83 and the non-carbon bed 82 which is a region other than the coal bed 83 exist, the tunnel 81 is first formed in the coal bed 83. Next, a hole 84 which penetrates the coal bed 83 from the upper surface 81 B of the tunnel 81 and reaches the non-carbon bed 82 is formed. A cured resin (not shown) such as an epoxy resin is injected into the formed holes 84. Thereafter, the stranded wire 1 is inserted into the hole 84.
- a cured resin such as an epoxy resin is injected into the formed holes 84.
- the stranded wire 1 is fixed in the hole 84. Then, the twisted wire 1 is tensioned, and the wedge member 71 is installed in the vicinity of the opening of the hole 84 present on the upper surface of the tunnel 81. Thereby, the strand wire 1 is fixed in the state to which predetermined
- an explosive is placed on a desired area of the lower surface of the coal bed 83 located at the upper part of the tunnel 81, and the coal falls onto the lower surface 81A of the tunnel 81 by blasting.
- the dropped coal is collected, for example, by a working machine 72 such as a wheel loader capable of traveling on the lower surface 81A of the tunnel 81, and is transported to the outside of the tunnel 81.
- a working machine 72 such as a wheel loader capable of traveling on the lower surface 81A of the tunnel 81, and is transported to the outside of the tunnel 81.
- vibration energy of blasting in the adjacent region is absorbed by the expansion and contraction of the strand wire 1.
- the collapse of the coal bed 83 in the area other than the desired area is suppressed, and the collection of coal can be proceeded safely and smoothly.
- the stranded wire 1 is installed on the coal bed 83 located in the upper part of the tunnel 81, for example. It may be used for the purpose of suppressing.
- the use of the strand wire 1 is not restricted to the use in a coal mine, It can be widely used for the purpose for absorption of energy, such as a vibration.
- the stranded wire in the second embodiment basically has the same configuration as that in the first embodiment, and exhibits the same effect. However, the stranded wire of the second embodiment is different from that of the first embodiment in the arrangement of steel wires.
- the stranded wire 1 of the second embodiment includes a center line 10, a plurality of (six) first circumferential lines 20, and a plurality (six (6)
- the large diameter second circumferential line 31 and a plurality of (six) small diameter second circumferential lines 32 are provided.
- the diameter of the center line 10 is equal to the diameter of the first circumferential line 20.
- the diameter of the large diameter second circumferential line 31 is larger than the diameter of the first circumferential line 20.
- the diameter of the small diameter second circumferential line 32 is smaller than the diameter of the first circumferential line 20.
- the diameters of the plurality of first circumferential lines 20 are the same.
- the diameters of the plurality of large diameter second circumferential lines 31 are the same.
- the diameters of the plurality of small diameter second circumferential lines 32 are the same.
- first circumferential lines 20 are arranged in a ring shape so as to be in contact with the outer circumferential surface of the center line 10 and to surround the outer circumferential side of the center line 10. Adjacent first circumferential lines 20 are in contact with each other.
- the large diameter second peripheral wire 31 and the small diameter second peripheral wire 32 are alternately arranged so as to contact the outer peripheral surface of the first peripheral wire 20 and surround the outer peripheral side of the region where the first peripheral wire 20 is arranged. ing.
- the large diameter second circumferential line 31 and the small diameter second circumferential line 32 adjacent to each other are in contact with each other.
- the large diameter second circumferential line 31 and the small diameter second circumferential line 32 have a yield stress greater than that of the center line 10 and the first circumferential line 20.
- FIG. 12 is a schematic cross-sectional view showing an enlarged contact portion between the center line 10 and the first circumferential line 20 in a cross section perpendicular to the longitudinal direction of the stranded wire 1.
- FIG. 13 is a schematic cross-sectional view showing an enlarged contact portion between the large diameter second circumferential line 31 and the first circumferential line 20 in a cross section perpendicular to the longitudinal direction of the stranded wire 1.
- FIG. 14 is a schematic cross-sectional view showing an enlarged contact portion between the small diameter second circumferential wire 32 and the first circumferential wire 20 in a cross section perpendicular to the longitudinal direction of the stranded wire 1.
- the outer peripheral surface 20A of the outer peripheral surface 10A and the first circumferential line 20 of the center line 10 are in surface contact. That is, the outer peripheral surface 10 ⁇ / b> A of the center line 10 and the outer peripheral surface 20 ⁇ / b> A of each first peripheral line 20 are in surface contact.
- the ratio of the area in contact with the center line 10 in the outer circumference of each first circumferential line 20 is 5% or more and 10% or less. That is, the length alpha 4 ratio of with respect to the outer peripheral length of each first circumferential line 20 is 10% or less than 5%.
- the hardness of the outer circumferential surface 20A of the first circumferential line 20 is equal to the hardness of the outer circumferential surface 10A of the center line 10. Therefore, each first circumferential line 20 and the center line 10 are deformed to the same extent, and each first circumferential line 20 and the center line 10 are in surface contact. As a result, the area of the outer peripheral surface 10A of the center line 10 in contact with the first peripheral line 20 is flat.
- Alpha 3 (the difference between the radii of the contact region and the region other than the contact area) deformation amount in the radial direction due to contact with the first peripheral line 20 of the center line 10 has a 0.3mm or 1.5mm or less.
- outer peripheral surface 20A of each first circumferential wire 20 and outer peripheral surface 31A of one large diameter second circumferential wire 31 have a length ⁇ 4 In contact with That is, the outer circumferential surface 20A of the first circumferential line 20 and the outer circumferential surface 31A of the large diameter second circumferential line 31 are in surface contact with each other.
- the ratio of the area in contact with one large diameter second circumferential line 31 in the outer periphery of the first circumferential line 20 is 5% or more and 10% or less. That is, the length beta 4 ratio of with respect to the outer peripheral length of each first circumferential line 20 is 10% or less than 5%.
- the hardness of the outer circumferential surface 31A of the large diameter second circumferential line 31 is higher than the hardness of the outer circumferential surface 20A of the first circumferential line 20. Therefore, the large diameter second circumferential line 31 and the first circumferential line 20 are in surface contact with each other so that the large diameter second circumferential line 31 is pushed into the first circumferential line 20. As a result, the area of the outer circumferential surface 20A of the first circumferential line 20 in contact with the large diameter second circumferential line 31 has a concave shape. (Radius difference between the contact region and the region other than the contact area) beta 3 deformation amount in the radial direction due to contact between the thick second round line 31 of the first peripheral line 20 and 0.3mm or 1.5mm or less It has become.
- the outer circumferential surface 20A of each first circumferential wire 20 and the outer circumferential surface 32A of one small diameter second circumferential wire 32 have a length ⁇ 6 In contact with That is, the outer circumferential surface 20A of the first circumferential line 20 and the outer circumferential surface 32A of the small diameter second circumferential line 32 are in surface contact with each other.
- the ratio of the area in contact with the first small diameter second circumferential line 32 in the outer circumference of the first circumferential line 20 is 5% or more and 10% or less. That is, the ratio of the peripheral length beta 6 to the length of the first peripheral line 20 is 10% or less than 5%.
- the hardness of the outer circumferential surface 32A of the small diameter second circumferential line 32 is higher than the hardness of the outer circumferential surface 20A of the first circumferential line 20. Therefore, the small diameter second circumferential line 32 and the first circumferential line 20 are in surface contact with each other so that the small diameter second circumferential line 32 is pressed against the first circumferential line 20. As a result, the area of the outer circumferential surface 20A of the first circumferential line 20 in contact with the narrow second circumferential line 32 has a concave shape.
- Beta 5 difference between the radii of the contact region and the region other than the contact area deformation amount in the radial direction due to contact between the small-diameter second peripheral line 32 of the first peripheral line 20 and 0.3mm or 1.5mm or less It has become.
- the same effect as that of the first embodiment can be obtained.
- the large diameter second peripheral wire 31 and the small diameter second peripheral wire 32 are alternately arranged so as to surround the outer peripheral side of the region where the first peripheral wire 20 is disposed.
- the external shape of the cross section perpendicular to the longitudinal direction of the stranded wire 1 can be made close to a true circle.
- a stranded wire 1 having the same configuration as that of Embodiment 1 was produced.
- the outer diameters of the center line 10, the first circumferential line 20, and the second circumferential line 30 were 5.04 mm, 2.57 mm, and 4.53 mm, respectively.
- the outer diameter of the stranded wire 1 (the diameter of the circumscribed circle with respect to the cross section perpendicular to the longitudinal direction) was 18 mm.
- As the center line 10 and the first circumferential line 20 a mild steel wire specified in JIS G3505 was adopted.
- As the second circumferential wire 30, a PC steel wire defined in JIS G3536 was adopted.
- the breaking load was 371 kN and the elongation at break was 7.8%.
- the expansion and contraction of the stranded wire 1 forms a loop similar to that of FIG. 5 in the relationship between the elongation and the tensile load. From this, it is confirmed that energy absorption can be achieved by the expansion and contraction of the stranded wire 1.
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Abstract
Description
上記撚り線においては、伸縮によるエネルギー吸収量の増大が求められている。そこで、伸縮によるエネルギー吸収量を増大させることが可能な撚り線を提供することを目的の1つとする。
本開示の撚り線によれば、伸縮によるエネルギー吸収量を増大させることができる。
最初に本願発明の実施態様を列記して説明する。本願の撚り線は、複数の鋼線が撚り合わされた撚り線である。この撚り線は、長手方向に垂直な断面において、上記鋼線である中心線と、上記鋼線であって、中心線に接触し、中心線の外周側を取り囲むように並べて配置される複数の第1周線と、上記鋼線であって、第1周線に接触し、第1周線が配置される領域の外周側を取り囲むように並べて配置され、中心線および第1周線よりも降伏応力が大きい複数の第2周線と、を備える。中心線と第1周線とは面接触している。第1周線と第2周線とは面接触している。
次に、本発明にかかる撚り線の実施の形態を、以下に図面を参照しつつ説明する。なお、以下の図面において同一または相当する部分には同一の参照番号を付しその説明は繰返さない。
(1)撚り線の構造
図1および図2を参照して、本実施の形態における撚り線1は、複数の鋼線が撚り合わされた撚り線である。撚り線1は、長手方向に垂直な断面において、中心線10と、複数の(本実施の形態では9本の)第1周線20と、複数の(本実施の形態では9本の)第2周線30とを備えている。中心線10、第1周線20および第2周線30は、いずれも鋼線である。中心線10、第1周線20および第2周線30の長手方向に垂直な断面は、いずれも円形である。中心線10の直径は、第1周線20の直径よりも大きい。第2周線30の直径は、第1周線20の直径よりも大きい。複数の第1周線20の直径は同一である。複数の第2周線30の直径は同一である。中心線10と第1周線20とは、同種の鋼からなっている。中心線10および第1周線20としては、たとえばJIS規格G3505に規定される軟鋼線材などを採用することができる。第2周線30としては、たとえばJIS規格G3536に規定されるPC鋼線などを採用することができる。
次に、図5を参照して、撚り線1の伸縮によるエネルギーの吸収について説明する。図5において、横軸は撚り線1の長手方向における伸び、縦軸は撚り線1の長手方向における引張荷重を示している。図5において、細線Aは中心線10および第1周線20の挙動を示している。図5において、破線Bは第2周線30の挙動を示している。図5において、太線Cは撚り線1全体の挙動を示している。
本実施の形態の撚り線1においては、中心線10と第1周線20とが面接触しており、かつ第1周線20と第2周線30とが面接触している。そのため、第1周線20と中心線10および第2周線30との間の摩擦力が大きくなり、撚り線1を構成する鋼線の抜けが抑制されている。その結果、撚り線1が伸縮する際のエネルギーの吸収量が大きくなっている。このように、本実施の形態の撚り線1は、伸縮によるエネルギー吸収量を増大させることが可能な撚り線となっている。
撚り線1において、中心線10、第1周線20および第2周線30の外周面の面粗さはRaで0.5μm以上であることが好ましい。これにより、第1周線20と中心線10および第2周線30との間の十分な摩擦力を得ることが容易となる。
次に、本実施の形態における撚り線1の製造方法の一例について説明する。図6を参照して、本実施の形態における撚り線1の製造方法では、まず工程(S10)として鋼線準備工程が実施される。この工程(S10)では、所望の形状および機械的性質を有し、適切な成分組成の鋼からなる鋼線である中心線10、第1周線20および第2周線30が準備される。具体的には、たとえば適切な成分組成の鋼からなる鋼線が準備され、必要に応じて伸線加工が実施されることにより、中心線10、第1周線20および第2周線30が準備される。
次に、撚り線1の用途の一例について説明する。撚り線1は、以下に説明するように、たとえば炭鉱において使用することができる。図9を参照して、炭層83と、炭層83以外の領域である非炭層82とが存在する炭鉱80において、まず炭層83に坑道81を形成する。次に、坑道81の上面81Bから炭層83を貫通し、非炭層82に到達する穴84を形成する。形成された穴84には、エポキシ樹脂などの硬化樹脂(図示しない)を注入する。その後、穴84に撚り線1が挿入される。硬化樹脂としては、たとえば数時間~数日程度で硬化するものを採用する。そうすると、撚り線1が穴84内に固定される。そして、撚り線1が緊張され、坑道81の上面に存在する穴84の開口部付近にくさび部材71が設置される。これにより、所定の引張応力が付与された状態で撚り線1が固定される。
次に、本発明の他の実施の形態である実施の形態2について説明する。実施の形態2における撚り線は、基本的には実施の形態1の場合と同様の構成を有し、同様の効果を奏する。しかし、実施の形態2の撚り線は、実施の形態1の場合と鋼線の配置において異なっている。
80 炭鉱、81 坑道、81A 下面、81B 上面、82 非炭層、83 炭層、84 穴、90 圧縮加工装置、91 第1ローラ、92 第2ローラ、93 第3ローラ、94 第4ローラ。
Claims (14)
- 複数の鋼線が撚り合わされた撚り線であって、
長手方向に垂直な断面において、
前記鋼線である中心線と、
前記鋼線であって、前記中心線に接触し、前記中心線の外周側を取り囲むように並べて配置される複数の第1周線と、
前記鋼線であって、前記第1周線に接触し、前記第1周線が配置される領域の外周側を取り囲むように並べて配置され、前記中心線および前記第1周線よりも降伏応力が大きい複数の第2周線と、を備え、
前記中心線と前記第1周線とは面接触しており、
前記第1周線と前記第2周線とは面接触している、撚り線。 - 前記複数の第1周線は9本の前記第1周線から構成され、
前記複数の第2周線は9本の前記第2周線から構成される、請求項1に記載の撚り線。 - 前記中心線の前記第1周線との接触による径方向における変形量は0.3mm以上である、請求項1または請求項2に記載の撚り線。
- 前記中心線の前記第1周線との接触による径方向における変形量は1.5mm以下である、請求項1~請求項3のいずれか1項に記載の撚り線。
- 前記第1周線の前記第2周線との接触による径方向における変形量は0.3mm以上である、請求項1~請求項4のいずれか1項に記載の撚り線。
- 前記第1周線の前記第2周線との接触による径方向における変形量は1.5mm以下である、請求項1~請求項5のいずれか1項に記載の撚り線。
- 長手方向に垂直な断面において、前記複数の第1周線のそれぞれの外周のうち前記中心線と接触している領域の割合は5%以上である、請求項1~請求項6のいずれか1項に記載の撚り線。
- 長手方向に垂直な断面において、前記複数の第1周線のそれぞれの外周のうち前記中心線と接触している領域の割合は10%以下である、請求項1~請求項7のいずれか1項に記載の撚り線。
- 長手方向に垂直な断面において、前記複数の第1周線のそれぞれの外周のうち、前記複数の第2周線のうち一の前記第2周線と接触している領域の割合は5%以上である、請求項1~請求項8のいずれか1項に記載の撚り線。
- 長手方向に垂直な断面において、前記複数の第1周線のそれぞれの外周のうち、前記複数の第2周線のうち一の前記第2周線と接触している領域の割合は10%以下である、請求項1~請求項9のいずれか1項に記載の撚り線。
- 前記中心線、前記第1周線および前記第2周線の外周面の面粗さはRaで0.5μm以上である、請求項1~請求項10のいずれか1項に記載の撚り線。
- 前記中心線、前記第1周線および前記第2周線の外周面の面粗さはRaで10μm以下である、請求項1~請求項11のいずれか1項に記載の撚り線。
- 前記中心線および前記第1周線の降伏応力は200N/mm2以上600N/mm2以下である、請求項1~請求項12のいずれか1項に記載の撚り線。
- 前記第2周線の降伏応力は1800N/mm2以上2300N/mm2以下である、請求項1~請求項13のいずれか1項に記載の撚り線。
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CN201780092706.7A CN110869553B (zh) | 2017-06-30 | 2017-06-30 | 绞合线 |
AU2017420962A AU2017420962B2 (en) | 2017-06-30 | 2017-06-30 | Stranded wire |
KR1020207002197A KR102491312B1 (ko) | 2017-06-30 | 2017-06-30 | 연선 |
PCT/JP2017/024254 WO2019003444A1 (ja) | 2017-06-30 | 2017-06-30 | 撚り線 |
JP2019526118A JP6844698B2 (ja) | 2017-06-30 | 2017-06-30 | 撚り線 |
US16/619,915 US20200190735A1 (en) | 2017-06-30 | 2017-06-30 | Stranded wire |
EP17915835.7A EP3647486A4 (en) | 2017-06-30 | 2017-06-30 | MULTI-STRAND WIRE |
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JP2007321503A (ja) * | 2006-06-02 | 2007-12-13 | Kansai Tlo Kk | 複合pc鋼材及び複合pc鋼撚り線 |
JP2013177745A (ja) | 2012-02-28 | 2013-09-09 | Sumitomo Denko Steel Wire Kk | 複合ストランド |
JP2015010309A (ja) * | 2013-07-02 | 2015-01-19 | 株式会社ブリヂストン | タイヤ用コード、タイヤ用補強材及び空気入りタイヤ |
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AU2017420962A1 (en) | 2020-01-16 |
KR102491312B1 (ko) | 2023-01-20 |
EP3647486A4 (en) | 2021-02-17 |
JPWO2019003444A1 (ja) | 2020-04-23 |
EP3647486A1 (en) | 2020-05-06 |
US20200190735A1 (en) | 2020-06-18 |
KR20200023411A (ko) | 2020-03-04 |
AU2017420962B2 (en) | 2023-11-09 |
CN110869553A (zh) | 2020-03-06 |
JP6844698B2 (ja) | 2021-03-17 |
CN110869553B (zh) | 2023-02-17 |
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