A magnetic detector includes permanent magnets that magnetize a wire rope W in the longitudinal direction, and a search coil that detects a change in the cross sectional area of the wire rope W magnetized by the permanent magnets. The magnetic detector is provided so as to surround a part of the wire rope W. Prior to inspection, the magnetic detector is moved back and forth at least three times across an inspection range of the wire rope W. After the magnetic detector is moved back and forth, the change in the cross sectional area, that is, damage to the wire rope W is inspected by using signals outputted from the search coil.
G01N 27/83 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
NATIONAL UNIVERSITY CORPORATION KUMAMOTO UNIVERSITY (Japan)
Inventor
Ishimoto, Kazuhiro
Kawamura, Yoshihito
Abstract
The present invention provides a novel heat exchange medium to replace lead. A carbon-steel wire 1A heated in a heating furnace 11 is passed through a bath 12A filled with a liquid-phase Mg—Al—Ca alloy 20 obtained by melting a Mg—Al—Ca alloy in which the main constituent elements are Mg (magnesium), Al (aluminum) and Ca (calcium). When it passes through the bath 12A, the carbon-steel wire 1A, which has been heated for example to about 950° C. in the heating furnace 11, is cooled to about 550° C. The Mg—Al—Ca alloy is non-toxic and has no environmental impact as well.
Provided is a wedge clamp for anchoring an end of a steel wire for further enhancement in workability upon use.
A wedge clamp 1 for retaining a steel wire includes a first member 12 having a wedge shape and a second member 11 slidably fitting the first member 12 to restrain a steel wire by a pressure that generates based on the wedge shape of the first member 12, the wedge clamp 1 including an engaging portion (protrusion 124 and anchoring portion 113) enabling slidable fit between the first member 12 and the second member 11 while engaging the first member 12 and the second member 11.
F16G 11/04 - Means for fastening cables or ropes to one another or to other objectsCaps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps of grommet-thimble type
4.
Anchorage of continuous fiber-reinforced polymer strands
In an anchorage (1) of continuous fiber-reinforced polymer (CFRP) strands that anchors continuous fiber-reinforced polymer strands (2) to concrete structures, there is provided an untwisted diameter-expanded portion (3) expanded to a diameter D2 by being radially expanded with respect to a diameter D1 of a general portion (4) of the CFRP strands (2) by untwisting any section of the CFRP strands (2) formed by stranding a plurality of element wires (20, 21) that are bundles of multiple continuous fibers, and filling and curing a time curable material (5) in a clearance among the element wires the untwisted section that is untwisted.
A rope tester to ascertain the condition of a wire rope in advance without increasing workload, Including a magnetization detector having a magnetizer for generating a magnetic force, and a detector for detecting a change in magnetism produced in a wire rope magnetized by the magnetic force generated by the magnetizer; a digital camera, which is provided a predetermined distance away from the magnetization detector along the traveling direction of the wire rope, for imaging the wire rope; and a controller, which is connected to the magnetization detector and to the digital camera, for detecting the location of a defect in the wire rope based on a change in magnetism detected by the magnetization detector, and outputting a drive signal that actuates the digital camera at a timing at which the defect location arrives at the location at which the digital camera is installed.
G01N 27/82 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
G01N 21/89 - Investigating the presence of flaws, defects or contamination in moving material, e.g. paper, textiles
G01N 21/892 - Investigating the presence of flaws, defects or contamination in moving material, e.g. paper, textiles characterised by the flaw, defect or object feature examined
An object of the present invention is to further improve upon the strength and durability of a wire rope. A wire rope has a core rope made of steel; a covering layer, which is made of a composite resin, covering the outer peripheral surface of the core rope; and multiple side strands, which are made of steel, wound on the outer peripheral surface of the core rope covered with the covering layer. The composite resin constituting the covering layer is obtained by blending cellulose nanofibers with polypropylene serving as a matrix.
A brass-plated steel cord (1A) is immersed in an organic solvent (13). The steel cord 1A immersed in the organic solvent (13) is immersed in an aqueous alkaline solution (22). Subsequently, the steel cord 1A immersed in the aqueous alkaline solution (22) is immersed in an aqueous silane coupling agent solution (32). Finally, the steel cord (1A) immersed in the aqueous silane coupling agent solution (32) is heated. In this manner, a steel cord (1B) having a silane coupling agent adhered thereon can be produced, in which a silane coupling agent is bonded to the surface thereof satisfactorily.
C23C 22/78 - Pretreatment of the material to be coated
C23C 22/05 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
C23G 5/02 - Cleaning or de-greasing metallic material by other methodsApparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
D07B 1/06 - Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
9.
Method and apparatus for evaluating damage to magnetic linear body
A magnetic detector includes permanent magnets that magnetize a wire rope W in the longitudinal direction, and a search coil that detects a change in the cross sectional area of the wire rope W magnetized by the permanent magnets. The magnetic detector is provided so as to surround a part of the wire rope W. Prior to inspection, the magnetic detector is moved back and forth at least three times across an inspection range of the wire rope W. After the magnetic detector is moved back and forth, the change in the cross sectional area, that is, damage to the wire rope W is inspected by using signals outputted from the search coil.
G01N 27/83 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
A damage evaluation apparatus, to evaluate damage to a tendon embedded in concrete. The apparatus includes a magnetizer for generating magnetic force, and a detector for detecting change in magnetism produced from a damaged area of the tendon when magnetized. The magnetizer includes a excitation coil; an iron core passing through a center hole of the excitation coil; a pair of columnar yokes connected to respective ends of the iron core and extending toward the concrete; and a pair of plate-shaped yokes connected to the pair of columnar yokes at a distal end thereof for forming magnetic poles having spread along the surface of the concrete. By passing an electric current through the excitation coil, a magnetic circuit is formed by the yoke shaft, the pair of columnar yokes, the pair of plate-shaped yokes, and the tendon over a range thereof situated between the pair of plate-shaped yokes.
G01N 27/83 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
G01N 27/80 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating mechanical hardness, e.g. by investigating saturation or remanence of ferromagnetic material
G01R 33/02 - Measuring direction or magnitude of magnetic fields or magnetic flux
G01R 33/12 - Measuring magnetic properties of articles or specimens of solids or fluids
G01V 3/10 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
G01N 27/82 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
G01D 5/14 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
G01D 3/02 - Measuring arrangements with provision for the special purposes referred to in the subgroups of this group with provision for altering or correcting the transfer function
G01D 5/20 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
A damage evaluation apparatus, which is used on a concrete structure having an embedded tendon to be evaluated for damage. The damage apparatus includes a magnetizer for generating magnetic force, and a detector for detecting a change in magnetism produced from a damaged area of the tendon. The magnetizer includes an excitation coil; an iron core passed through a center hole of the excitation coil; and a pair of columnar yokes connected to respective ends of the iron core and each extending toward the surface of the concrete. By passing an electric current through the excitation coil, a magnetic circuit is formed by the yoke shaft, the pair of columnar yokes, and the tendon over a range thereof situated between a pair of plate-shaped yokes. Current that flows through the excitation coil is controlled such that the magnetic flux density of the tendon is rendered constant.
G01N 27/83 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
G01N 27/80 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating mechanical hardness, e.g. by investigating saturation or remanence of ferromagnetic material
G01R 33/02 - Measuring direction or magnitude of magnetic fields or magnetic flux
G01R 33/12 - Measuring magnetic properties of articles or specimens of solids or fluids
G01V 3/10 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
G01N 27/82 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer
G01R 33/06 - Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
G01D 5/14 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
G01D 3/02 - Measuring arrangements with provision for the special purposes referred to in the subgroups of this group with provision for altering or correcting the transfer function
G01D 5/20 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
12.
Running wire rope and method of manufacturing same
A wire rope formed from a resin core and six strands, the resin core having an inner core with a circular cross section and an outer layer built up on the periphery thereof. The outer layer has a melting temperature lower than that of the inner core. The six strands are twisted together helically on the periphery of the resin core in an intertwining die in such a state that gaps are assured between the strands. The resulting wire rope is heated in a heating unit at a temperature higher than the melting temperature of the outer layer but lower than the melting temperature of the inner core. The wire rope is formed by subsequently compressing the six strands from the periphery thereof in a compressing die. The molten outer layer is hardened by natural cooling, after which the wire rope is taken up.
According to the present invention, the condition of a wire rope can be determined in advance without increasing a workload. This rope tester is provided with: a magnetization detector 10 which includes a magnetizer that generates a magnetic force, and a detector that detects a magnetic change occurring in a wire rope 1 magnetized by the magnetic force generated by the magnetizer; a digital camera 21 which is provided at a prescribed distance from the magnetization detector 10 in the moving direction of the wire rope 1 and photographs the wire rope 1; and a controller 30 which is connected to the magnetization detector 10 and the digital camera 21, detects a defect point of the wire rope 1 on the basis of the magnetic change detected by the magnetization detector 10, and outputs a driving signal for driving the digital camera 21 at a timing at which the defect point reaches the installation point of the digital camera 21.
G01N 21/892 - Investigating the presence of flaws, defects or contamination in moving material, e.g. paper, textiles characterised by the flaw, defect or object feature examined
G01N 27/82 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
14.
ATTACHMENT FOR ROTATING STRANDED WIRE WEDGE, TENSION KIT FOR STRANDED WIRE, AND STRANDED WIRE CONNECTION COUPLER
A stranded wire wedge (50), an anchor head (10), and an attachment (20, 20A, 20B, 20C) are used when tensioning a stranded wire. The stranded wire wedge (50) has an inner surface where a plurality of helical grooves (51b) for engaging with the helical outer peripheral surface of the stranded wire is formed, the stranded wire wedge (50) being attached to the outer peripheral surface of the stranded wire. The anchor head (10) has a hollow portion (11) in which the stranded wire wedge (50) is wedged. The attachment (20, 20A, 20B, 20C) has: an accommodation space (21) in which the large-diameter end portion of the stranded wire wedge (50) is accommodated; and a through hole (22) connected to the accommodation space (21) and having a dimension allowing the stranded wire to pass therethrough, wherein a rotating member (25, 25A) for assisting the rotation of the stranded wire wedge (50) along the helical outer peripheral surface of the stranded wire when the stranded wire (1) coming out from the through hole (22) is tensioned is provided in the accommodation space (21).
The purpose of the present invention is to further improve the strength and durability of a wire rope. A wire rope 10 according to the present invention is provided with: a core rope 11 that is formed from a steel; a cover layer 12 that covers the outer circumference of the core rope 11 and is formed from a composite resin; and a plurality of lateral strands 13 that are formed from a steel and are wound around the outer circumference of the core rope 11, which has been covered by the cover layer 12. The composite resin that constitutes the cover layer 12 is obtained by blending cellulose nanofibers into a polypropylene resin that serves as the matrix.
The purpose of the present invention is to sufficiently impregnate a high strength fiber bundle with a thermoplastic resin without impinging mechanical strength. A high strength fiber composite material cable is made by impregnating a bundle of carbon fibers with a matrix resin. The matrix resin is obtained by mixing a thermoplastic resin, for example polyphenylene sulfide, with an oligomer with a weight-average molecular weight of less than 10,000 obtained by reacting an organic compound containing a phenolic hydroxyl group and an organic compound containing a glycidyl ether group. The matrix resin has a lower viscosity than the parent thermoplastic resin, and can easily and reliably permeate the bundle of carbon fibers.
A linear body that may be smoothly removed from a bobbin. The bobbin includes a guide tube, a pair of flanges provided on the ends of the guide tube, and a winding drum sandwiched between the pair of flanges. One flange is removably attached to one end of the guide tube and the other flange is fixedly secured to the other end of said guide tube. The winding drum includes a plurality of split drum plates separated by a plurality of slits. A biasing mechanism for biasing each split drum plate inwardly is provided. When the detachable flange has been attached, the split drum plates are supported at both ends from the inner side thereof by supporting projections on the inner surface of each of the flanges. When the detachable flange is removed, the split drum plates move inwardly owing to the respective biasing mechanisms.
A split wedge body (6), which has a curved inner surface (6a), is formed to become gradually thicker from a distal end toward a terminal end, and is made to cover the outer peripheral surface of a CFRP cable (1), whereby the outer peripheral surface of the CFRP cable (1) is enclosed over a prescribed length. A gap (G) extending in a longitudinal direction is ensured between end surfaces (30L, 30R), which face each other when a plurality of the split wedge bodies (6) are arranged on the outer peripheral surface of the CFRP cable (1). The gap (G) has an inclined portion that runs along a trough part (1b) of the CFRP cable (1) enclosed by the split wedge bodies (6).
F16G 11/04 - Means for fastening cables or ropes to one another or to other objectsCaps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps of grommet-thimble type
D07B 9/00 - Binding or sealing ends, e.g. to prevent unravelling
20.
WIRE ROPE DAMAGE DETECTION METHOD, AND SIGNAL PROCESSING DEVICE AND DAMAGE DETECTION DEVICE USED FOR WIRE ROPE DAMAGE DETECTION
A magnetization detector (10) is provided with permanent magnets (11, 12) which magnetize a wire rope W in a longitudinal direction, and a search coil (13) which detects a change in the cross sectional area of the wire rope W magnetized by the permanent magnets (11, 12). The magnetization detector (10) is disposed so as to surround a part of the wire rope W. Prior to inspection, the magnetization detector (10) is moved back and forth at least three times across an inspection range for the wire rope W. After the magnetization detector (10) has been moved back and forth, a signal output from the search coil (13) is used to inspect a change in the cross sectional area, i.e., damage to the wire rope W.
G01N 27/83 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
21.
DAMAGE EVALUATION METHOD AND DAMAGE EVALUATION DEVICE FOR MAGNETIC LINEAR OBJECT
A damage evaluation device (1) is installed and used on a concrete structure in which a tendon (10) to be evaluated for damage is embedded, and includes a magnetizer (20) for generating a magnetic force, and detectors (41F, 41R, 61) for detecting an amount of magnetic variation occurring from a damaged location of the tendon (10) magnetized by the generated magnetic force. The magnetizer includes: an excitation coil (24); an iron core (26) inserted in a center hole of the excitation coil; a pair of columnar yokes (31F, 31R) connected to both ends of the iron core and each extending toward the concrete surface; and a pair of plate-shaped yokes (32F, 32R) for forming magnetic poles having a spread along the concrete surface, the plate-shaped yokes (32F, 32R) being connected to respective distal ends of the pair of columnar yokes. An electric current is caused to flow through the excitation coil, whereby a magnetic circuit is formed by a yoke shaft, the pair of columnar yokes, the pair of plate-shaped yokes, and the range of the tendon that is positioned between the pair of plate-shaped yokes.
G01N 27/82 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
G01N 27/83 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
22.
DEVICE AND METHOD FOR EVALUATING DAMAGE TO MAGNETIC LINEAR OBJECT
A damage evaluation device (1) includes a magnetizer for generating magnetic force, and detection units (41F, 41R) for detecting the amount of variation in magnetism produced from a damaged portion of a wire rope (10) magnetized by the generated magnetic force. The magnetizer includes: an exciting coil (24); an iron core (26) inserted in a central hole in the exciting coil; and a pair of columnar yokes (31F, 31R) connected to the two ends of the iron core, the columnar yokes extending in the same direction with a space therebetween. An electric current is caused to flow through the exciting coil, thereby forming a magnetic circuit from a yoke shaft, the pair of columnar yokes, and the wire rope within a range positioned between the pair of columnar yokes. Search coils (41F, 41R) wound about each of the pair of columnar yokes are used as detection units.
G01N 27/82 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
23.
DAMAGE EVALUATION METHOD AND DAMAGE EVALUATION DEVICE FOR MAGNETIC LINEAR OBJECT
A damage evaluation device (1) is installed and used on a concrete structure in which a tendon (10) to be evaluated for damage is embedded, and includes a magnetizer (20) for generating a magnetic force, and detectors (41F, 41R) for detecting an amount of magnetic variation occurring from a damaged location of the tendon (10) magnetized by the generated magnetic force. The magnetizer includes an excitation coil (24), an iron core (26) inserted in a center hole of the excitation coil, and a pair of columnar yokes (31F, 31R) connected to both ends of the iron core and each extending toward the concrete surface. An electric current is caused to flow through the excitation coil, whereby a magnetic circuit is formed by a yoke shaft, the pair of columnar yokes, and the range of the tendon that is positioned between a pair of plate-shaped yokes. The electric current applied to the excitation coil is controlled so that the magnetic flux density of the tendon is constant.
G01N 27/82 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
24.
Continuous fiber reinforcing material tension apparatus, continuous fiber reinforcing material tension method, and wedge body
The continuous fiber reinforcing material tension apparatus includes a pressing body that presses a sleeve to a side of a fixed structure and contains a hollow portion, in which a wedge body is allowed to reciprocate along a continuous fiber reinforcing material, a cylindrical bracket located in an opposite side of the sleeve from the pressing body and having an inner wall surface on which a projection is formed, a columnar rotary jig that is allowed to reciprocate inside the bracket, that engages with an end face of the wedge body, that has a spiral key groove that engages with a key, and that applies rotative force around an axis of the continuous fiber reinforcing material, and a piston that presses an end face of the rotary jig to a side of the fixed structure.
E04G 21/12 - Mounting of reinforcing insertsPrestressing
B28B 23/04 - Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material wherein the elements are reinforcing members the elements being stressed
E01D 19/16 - Suspension cablesCable clamps for suspension cables
The present invention prepares six strands (3), and a resin core (2) obtained by layering an outer layer having a lower melting temperature than that of an inner core around the periphery of the inner core, which has a circular cross-section. A twisting die (11) helically twists the six strands (3) around the resin core (2) in a manner such that the gaps between the strands (3) are preserved. Next, a heating device (12) heats the wire rope (1A) at a temperature greater than the melting temperature of the outer layer and lower than the melting temperature of the inner core. Thereafter, a compression die (13) compresses the six strands (3) from the periphery thereof, and as a result, forms a wire rope (1B). The wire rope (1B) is wound up after the melted outer layer hardens by naturally cooling.
A carbon fiber cable (1) is provided with: a core wire (2) formed by bundling a plurality of carbon fibers (4) impregnated with a thermosetting resin (5); and a plurality of side wires (3), each of which is formed by bundling a plurality of carbon fibers (4) impregnated with the thermosetting resin (5). The thermosetting resin (5) is in a cured state, and each of the plurality of side wires (3) is shaped utilizing resin curability. Each of the plurality of shaped side wires (3) is in a state of being twisted around the core wire (2).
A carbon fiber cable (1) is provided with: a core wire (2) formed by bundling a plurality of carbon fibers (4) impregnated with a thermosetting resin (5); and a plurality of side wires (3), each of which is formed by bundling a plurality of carbon fibers (4) impregnated with the thermosetting resin (5). The thermosetting resin (5) is in a cured state, and each of the plurality of side wires (3) is shaped utilizing resin curability. Each of the plurality of shaped side wires (3) is in a state of being twisted around the core wire (2).
Provided is a wire rope inspection apparatus that is light, small in size and portable. A portable rope tester has a sensor device for sensing magnetic leakage flux leaking from a magnetized wire rope. Provided on the front of sensor device is a sensor face formed to be flat. The sensor face is pressed against the wire rope. By pressing the flat sensor face against the wire rope, magnetic leakage flux is sensed by the sensor device and whether the wire rope is damaged or not is detected. A handle is secured to the back of the sensor device on the side opposite the sensor face. The sensor device is held by grasping the handle by hand, and the sensor face of the device is pressed against the wire rope.
G01N 27/82 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
G01N 27/83 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
F16G 11/00 - Means for fastening cables or ropes to one another or to other objectsCaps or sleeves for fixing on cables or ropes
F16G 11/10 - Quick-acting fasteningsClamps holding in one direction only
B66B 7/12 - Checking, lubricating, or cleaning means for ropes, cables, or guides
B66B 5/00 - Applications of checking, fault-correcting or safety devices in elevators
The purpose of the invention is to allow a filament to be smoothly removed from a bobbin. A bobbin (1) comprises a guiding tube (30), a pair of flanges (10, 20) provided on the ends of the tube, and a winding drum (40) sandwiched between the flanges (10, 20) and provided on the outer circumference of the guiding tube (30). The flange (10) is freely attached to and detached from one end of the guiding tube (30), and the other flange (20) is fixed to the other end of the guiding tube (30). The winding drum (40) comprises a plurality of divided shell plates (41) that are divided by way of a plurality of slits that extend in the direction that the pair of flanges (10, 20) is joined. A biasing mechanism (50) that biases the divided shell plates (41) toward the interior is provided between the divided shell plates (41) and the guiding tube (30). When the freely attachable and detachable flange (10) is mounted, the divided shell plates (41) are supported at the ends of the plate from the inside by supporting projections (15) on the inner face of the flanges (10, 20). When the freely attachable and detachable flange (10) is removed, the divided shell plates (41) move inward.
Provided is a light, small, and portable wire rope inspection device. A portable rope tester (1) is provided with a sensor device (10) for detecting magnetic flux leakage from a magnetized wire rope (2). The front surface of the sensor device (10) has a flatly formed sensor surface, and this sensor surface is pressed against the wire rope (2). The pressing of the flat sensor surface against the wire rope (2) results in the sensing of magnetic flux leakage by the sensor device (10), and whether there is damage in the wire rope (2) is detected. A handle (23) is fixed to the rear surface of the sensor device (10) opposite from the sensor surface. The sensor device (10) is held through the grasping of the handle (23) by a hand, and the sensor surface of the sensor device (10) is pressed against the wire rope (2).
G01N 27/83 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
Provided is a steel cord having both shape stability and durability.A steel cord (1) is obtained by bundling five steel core wires (2), which are arrayed in parallel with one another in a plane, into a unitary body by means of an adhesive (3) having a thickness Ad of less than 15.mu.m. Each of the core wires (2) constituting the steel cord (1) has a diameter d of less than 0.45 mm, and spacing Gd between the core wires (2) is less than 20 .mu.m. The core wires (2) used have a free coil diameter D that is greater than wire diameter d thereof by 750 times or more.
B60C 9/00 - Reinforcements or ply arrangement of pneumatic tyres
B60C 9/20 - Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
D07B 1/06 - Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
D07B 1/16 - Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
Provided is a steel cord with both shape stability and durability. In the steel cord (1), five steel core wires (2), which are disposed parallel to each other in a plane, have been bundled as a unit using an adhesive (3) with a thickness (Ad) of less than 15 µm. The core wires (2) configuring the steel cord (1) have a diameter (d) of less than 0.45 mm and the interval (Gd) between the core wires (2) is less than 20 µm. A core wire, for which the free coil diameter (D) of the core wire (2) is at least 750 times the wire diameter (d) of the core wire (2), is used for said core wires (2).
D07B 1/06 - Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
B60C 9/00 - Reinforcements or ply arrangement of pneumatic tyres
B60C 9/20 - Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
D07B 1/16 - Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
33.
ANCHORING DEVICE FOR FIBER REINFORCED PLASTIC FILAMENT
Provided is an anchoring device for sandwiching and affixing a plurality of stressed materials constituted by fiber reinforced plastic filaments. This anchoring device is an anchoring device wherein a male member is inserted into a female member so as to sandwich and affix stressed materials constituted by fiber reinforced plastic filaments. The female member and the male member are formed in a tapered shape inclining from one end to the other end, and also a plurality of arrangement parts in which each of a plurality of stressed materials is to be disposed are disposed at prescribed gaps from each other in the circumferential direction of the inclined tapered surface between the female member and the male member is provided. Furthermore, the length from the one end to the other end of the female member and the male member corresponding to the direction of length of the tapered surfaces that the stressed materials contact is formed so as to be 130 mm or greater.
An anchoring device secures tendons formed of a filament body made of fiber reinforced plastic by inserting a male member into a female member to sandwich the tendons between them. Each of the female member and the male member is formed in a tapered shape inclined from one end toward the other end and the female member and the male member include a plurality of mount portions at predetermined intervals in a circumferential direction of an inclined tapered face between the female member and the male member, each of the plurality of tendons being placed on a different one of the mount portions. The length from the one end to the other end of each of the female member and the male member corresponding to a length direction of the tapered face in contact with the tendon is equal to or larger than 130 mm.
F16G 11/04 - Means for fastening cables or ropes to one another or to other objectsCaps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps of grommet-thimble type
The present invention is to provide a hybrid core rope which does not require maintenance or a hybrid core rope capable of reducing a maintenance task. The hybrid core rope includes a resin solid core in which a plurality of spiral grooves is formed in the longitudinal direction on an outer peripheral surface thereof, a plurality of fiber bundles respectively spirally wound around the outer peripheral surface of the resin solid core along the plurality of spiral grooves, the fiber bundles having thickness to fill the spiral grooves, and a plurality of steel strands spirally wound around the outer peripheral surface of the resin solid core around which the fiber bundles are wound. The fiber bundles and the strands are respectively wound so as to have angles which are not parallel to each other.
D07B 1/06 - Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
D07B 1/14 - Ropes or cables with incorporated auxiliary elements, e.g. for making, extending throughout the length of the rope or cable
D07B 5/12 - Making ropes or cables from special materials or of particular form of low twist or low tension by processes comprising setting or straightening treatments
A flat wire that is not susceptible to changing into a helical shape over time is provided. The flat wire (10) is composed of a large number of carbon fibers (31) impregnated with a thermosetting resin. A cross section of the flat wire (10) is rectangular, has an inner surface (12) that always faces inward and an outer surface (11) that always faces outward, and has a helical form with a fixed diameter in the longitudinal direction. The lengths of the carbon fibers (31) constituting the flat wire (10) gradually become longer toward the outer surface (11) from the inner surface (12).
D04H 3/04 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
D04H 3/12 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with filaments or yarns secured together by chemical or thermo-activatable bonding agents, e.g. adhesives, applied or incorporated in liquid or solid form
F16L 9/16 - Rigid pipes wound from sheets or strips, with or without reinforcement
An object of the invention is to provide a high strength and light hybrid rope. At the center of the hybrid rope 1, there is arranged a high strength synthetic fiber rope 3 formed by braiding multiple high strength synthetic fiber bundles 30 each composed of multiple high strength synthetic fiber filaments 31. Given that the pitch of braid of the high strength synthetic fiber bundles 30 is represented by “L” and the diameter of the high strength synthetic fiber rope 3 is represented by “d”, the pitch of braid “L” and the diameter “d” are adjusted such that the value L/d is equal to or higher than 6.7.
a) adhered to top and bottom surfaces thereof, the friction sheet is covered from above with a braided net tube (3) obtained by braiding a steel wire, and the portion covered with the friction sheet (2) and braided net tube (3) is embraced and secured inside an end socket (4) by a wedge (5). The end socket (4) can be secured rapidly and reliably to the end portion of the carbon fiber-reinforced plastic cable (1) while maintaining a comparatively high anchoring efficiency.
B25G 3/28 - Locking or securing devices comprising wedges, keys, or like expanding means
F16B 2/14 - Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening using wedges
Disclosed is a hybrid rope which has enhanced strength and a reduced weight. The hybrid rope (1) includes, disposed in the center thereof, a high-strength synthetic-fiber rope (3) formed by braiding a plurality of high-strength synthetic-fiber bundles (30) each composed of a plurality of high-strength synthetic fiber filaments (31). The braiding pitch L of the high-strength synthetic-fiber bundles (30) and the diameter d of the high-strength synthetic-fiber rope (3) have been regulated so that the value of L/d is 6.7 or more.
D07B 1/04 - Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics with a core of fibres or filaments arranged parallel to the centre line
D07B 1/16 - Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
The disclosed device for producing wire rope produces a filler-filled wire rope comparatively quickly. A tubular wire twisting machine (10) and a cage wire twisting machine (20) are disposed in tandem. The rotating shaft (14) of the tubular wire twisting machine (10) and the rotating shaft (21) of the cage wire twisting machine (20) are linked. Six lateral strands (3) are wound by the feed bobbin (12) of the tubular wire twisting machine (10), and six strands of filler material (4) are wound by the feed bobbin (27) of the cage wire twisting machine (20). The six lateral strands (3) and the six strands of filler material (4) are alternately twisted around the periphery of a core rope (2) supplied from the outside, producing a filler-filled wire rope (1).
D07B 3/02 - General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the supply reels rotate about the axis of the rope or cable
D07B 1/06 - Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
D07B 1/16 - Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
The invention relates to a composite twisted cable formed by impregnating carbon fibers with thermoplastic resin, and provides a fiber composite twisted cable which allows downsizing of a reel by being easy to be bent, can be transported to mountain areas which is normally hard to achieve a transport with a large vehicle, is hard to be curled, and is superior in workability. It is a cable having 1×n structure which is formed by impregnating bundles of carbon fibers with thermosetting resin, then twisting a plurality of strands each formed by covering an outer periphery of the bundle with a fiber, and then curing the thermosetting resin by applying the heat treatment, and a core strand and side strands which constitute the cable are separated and independent without being bonded so as to allow independent behavior of the respective strands when the cable is bent.
The terminal portion of a cable (1) made of carbon fiber reinforced plastic is covered with a friction sheet (2) the front and rear surfaces of which abrasive particles (2a) adhere to, and moreover covered with a blade net tube (3) obtained by netting steal elemental wires. The portion covered with the friction sheet (2) and the blade net tube (3) is affixed sandwiched between wedges (5) within a terminal socket (4). While ensuring comparatively great affixing efficiency, the terminal socket (4) can speedily and reliably be affixed to the terminal portion of the cable (1) made of carbon fiber reinforced plastic.
A cargo is hoisted and lowered via a wire rope and a sheave over which the wire rope is looped by paying out the wire rope from a drum and rewinding the wire rope to the drum. On the basis of load data relating to the cargo, which is outputted from a load cell provided in the sheave, the presence or absence of an actual load of the cargo and a shock load exceeding the actual load by a predetermined amount is detected (step 33). When the presence of the shock load is detected, the value obtained by multiplying the life subtraction value when the presence of the shock load is not detected by a correction coefficient having a value exceeding 1 is subtracted from the estimated life (step 34), and the new estimated life (the remaining usable number of times) of the wire rope is displayed (step 35).
A wire rope for a running wire, has a core rope, a plurality of side strands arranged at an outer periphery of the core rope to be twisted together therewith, and a resin spacer interposed between the side strands, the core rope including a core rope main body composed of a plurality of wires and a resin coating layer outwardly surrounding the core rope main body so that the resin coating layer separates the core rope main body from the side strands, each of the side strands being composed of a plurality of further wires, and the resin spacer being provided with contour corresponding to an outer layer of the further wires of the side strands and extending between the wires of the outer layer of the side strands.
A practical cable made of a high strength fiber composite material is provided, which has high and stable strength, in addition, has even axial tension against bending and thus has a stable shape, and can be wound on a reel without shape deformation, and is hardly buckled when it is inserted into a hole or cylinder. The cable is formed by singly twisting a plurality of high strength fiber composite materials is used as a strand, and a plurality of the strands are twisted together at a twist angle of 2 to 12 degrees in a direction opposite to a twist direction of the strands, so that a double twist structure is made.
[PROBLEMS] A remote monitoring system for a wire rope, capable of accurately, objectively, and continuously monitoring the wire rope used as a running rope in an important facility and in a facility where damage to the rope can cause a serious accident. [MEANS FOR SOLVING PROBLEMS] The remote monitoring system has means for measuring conditions of the wire rope; a first monitoring device for recording/displaying and storing measurement data outputted by the measurement means, determining the presence of an abnormality based on the relationship between the data obtained by processing the measurement data and the stored data, and issuing an alarm when there is an abnormality; and a second monitoring device at a remote place, connected to the first monitoring device via communication means, communicating data with the first monitoring device, re-checking data of determination means upon receiving the alarm, performing final determination, and informing the first monitoring device of the result.
G01N 27/83 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
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