Abstract: A high-strength wire mesh formed by a wire having a tensile strength exceeding 2200 MPa, and having an amount of deflection of 707 mm or greater as a net body under the following conditions: a length of a cantilever beam that supports the net body in a line wire direction in a cantilevered state is 1000 mm, and an amount of displacement in a vertical direction of a free end at this situation is defined as the amount of deflection. In this manner, a high-strength wire mesh that is formed by a wire with a high tensile strength and that also has the followability to the unevenness of the slope surface is provided.

Abstract: A split wedge body, which has a curved inner surface, is formed gradually thicker from a tip portion to a terminal end portion thereof, and is made to cover the outer peripheral surface of a CFRP cable to thereby enclose the outer peripheral surface of the CFRP cable over a prescribed length thereof. A gap extending in the longitudinal direction is assured between end faces that oppose each other when a plurality of the split wedge bodies are arranged on the outer peripheral surface of the CFRP cable. The gap has an inclined portion that runs along a valley of the CFRP cable enclosed by the split wedge bodies.

Abstract: 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.

Abstract: A high-strength wire mesh formed by a wire having a tensile strength exceeding 2200 MPa, and having an amount of deflection of 707 mm or greater as a net body under the following conditions, conditions: a length of a cantilever beam that supports the net body in a line wire direction in a cantilevered state is 1000 mm, and an amount of displacement in a vertical direction of a free end at this situation is defined as the amount of deflection. In this manner, a high-strength wire mesh that is formed by a wire with a high tensile strength and that also has the followability to the unevenness of the slope surface is provided.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A carbon fiber cable includes a core member having multiple thermosetting-resin-impregnated carbon fibers bundled together, and multiple side members each having multiple thermosetting-resin-impregnated synthetic fibers bundled together in each side member. The thermosetting resin is in a cured state and each of the multiple side members has been shaped utilizing curability of the resin. The shaped multiple side members are each in such a state that they are twisted together around the core member.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A steel cord is obtained by bundling five steel core wires, which are arrayed in parallel with one another in a plane, into a unitary body by means of an adhesive having a thickness Ad of less than 15 ?m. Each of the core wires-constituting the steel cord has a diameter d of less than 0.45 mm, and spacing Gd between the core wires is less than 20 ?m. The core wires used have a free coil diameter D that is greater than wire diameter d thereof by 750 times or more.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A tension measurement apparatus that can carry out tension measurement of superior reproducibility with high sensitivity even for a target object of a stranded wire structure is provided. A cylindrical magnetizer arranged to surround a portion of a long magnetic element that becomes the target object of measurement direct-current magnetizes the magnetic element in the longitudinal direction up to the range of approach to saturation magnetization. Using a Hall element (magnetic sensor) arranged in proximity to the magnetic element at the central region in the longitudinal direction of the magnetic domain, the spatial magnetic field intensity in the neighborhood of the surface of the magnetic element, greatly differing corresponding to stress variation, is detected. Based on the detection value, the tension acting on the magnetic element is measured. Accordingly, a measurement result of superior reproducibility with high sensitivity is obtained.