Okazaki Manufacturing Company

Kazuhide Okazaki

Masaru Yamana

Taketo Nishikawa

Makoto Terada

Hideo Obi

A crack detection device for detecting a crack that occurs in a structure, includes: an MI cable that includes a metal sheath and a conductive wire accommodated in the metal sheath via a mineral insulating powder, and that is disposed along the structure so as to intersect an assumed crack C in a part of the structure where occurrence of a crack is assumed; a joint portion that is made of a metal that forms a joint when solidified from a melting state, and that joins the MI cable to the structure or a member fixed to the structure; and a detection device connected to both ends of a conductive wire, and configured to detect electrical characteristics of the conductive wire. The joint portion is present on one side and the other side with respect to the assumed crack C in a direction intersecting the assumed crack C.

Crack detection device

The present invention provides a structure for an end of an MI cable, capable of being produced in a short time with a small number of processing steps. In the structure for the end of the MI cable, a connector including metal pins is attached to the end of the MI cable, and the metal pins respectively have sharp-pointed front ends stuck into the end faces of the wires of the MI cable, and rear ends functioning as electrodes for connection with a soft cable.

Method for producing structure for end of MI cable

A terminal head, which is provided in a sheath type temperature sensor and is for connecting the sheath type temperature sensor and a cable, is structured such that, in order for replacement of the sheath type temperature sensor to be easily performed and in order to minimize the number of replacement parts, a terminal plate () of the terminal head () and the sheath type temperature sensorare coupled using a pair of plug-in connectors () and the coupling is held by a coupling nut (). When replacing the sheath type temperature sensor (), the leads () of the sheath type temperature sensor do not need to be detached from and attached to the terminal plate () at the replacement worksite, and the only replaced part other than the sheath type temperature sensor () is the one connector ().

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Hyogo, Japan

Kazuhide Okazaki