Tokyo Rope Manufacturing Co., Ltd.

Hitachi, Ltd.

Tokyo Rope Mfg. Co., Ltd.

Sumitomo (sei) Steel Wire Corp.

Kiswire Ltd.

Ippei Furukawa

Shunji Hachisuka

Toshiyuki Moriya

Hiroaki Itoi

Masashi Oikawa

Taichi Maeda

Takashi Teramoto

Naoaki Noguchi

Tomio Hayano

Kazuhiko Tsukada

Yoichi Shuto

Jaeduk Im

Jong-Eun Kim

Toshiro Kido

Shuji Ida

Youta Hashime

Youhei Nakamoto

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.

Rope tester, wire rope analyzing apparatus and control program therefor

An object of the invention is to provide a high strength and light hybrid rope. At the center of the hybrid rope, there is arranged a high strength synthetic fiber ropeformed by braiding multiple high strength synthetic fiber bundleseach composed of multiple high strength synthetic fiber filaments. Given that the pitch of braid of the high strength synthetic fiber bundlesis represented by 'L' and the diameter of the high strength synthetic fiber ropeis represented by 'd', the pitch of braid &#x201c;L&#x201d; and the diameter &#x201c;d&#x201d; are adjusted such that the value L/d is equal to or higher than 6.7.

Hybrid rope and method for manufacturing the same

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. The tension measurement apparatus is applicable even to a target object of a stranded wire structure.

Tension measurement apparatus

In an elevator wire ropestructured by twisting a plurality of schenkels, each schenkelbeing formed by twisting a plurality of strands, each strandbeing formed by twisting a plurality of fine steel wiresto, the interior of the wire rope being filled with a resin, and the surface of the wire rope being covered with a resin, wherein the direction in which the fine steel wirestoand the strandsare twisted and the direction in which the schenkelsare twisted are mutually opposite, and the diameter dof the inscribed circle of the plurality of twisted schenkelsis smaller than the diameter dof the schenkel

Elevator wire rope

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.

Wire rope for running wire

Growing community of inventors

Kasumigaura, Japan

Ippei Furukawa