Wire rope flaw detector

Patent metadata

Field	Value
Publication number	US-2020002133-A1
Application number	US-201716465419-A
Country	US
Kind code	A1
Filing date	Oct 2, 2017
Priority date	Dec 13, 2016
Publication date	Jan 2, 2020
Grant date	—

Abstract

Provided is a wire rope flaw detector according to the present invention includes a magnetizer configured to form a magnetic path in a predetermined segment of a wire rope, a magnetic sensor configured to detect a leakage magnetic flux generated from the wire rope, and a protective cover configured to prevent the wire rope from being brought into contact with the magnetic sensor. The wire rope flaw detector further includes a magnetic sensor protecting member configured to prevent the protective cover from being brought into contact with an upper face of the magnetic sensor so as to prevent application of a pressure equal to or larger than a predetermined pressure to the magnetic sensor.

First claim

1 - 9 . (canceled)

10 . A wire rope flaw detector configured to detect damage of a wire rope, comprising:
a magnetizer configured to form a magnetic path in a predetermined segment of the wire rope; a magnetic sensor, which is arranged so as to be magnetically insulated from the magnetizer, and is configured to detect a leakage magnetic flux generated from the magnetic path formed in the wire rope; a protective cover, which is provided between the magnetic sensor and the wire rope, has a groove for allowing the wire rope to pass therethrough, and has one face that is located on a side opposite to another face on a side on which the wire rope passes, the one face having a part maintained at such a position that the part of the one face is opposed to an upper face of the magnetic sensor; and a magnetic sensor protecting member which is provided on the lower face side of the protective cover and between the magnetizer and the magnetic sensor in the axial direction of the wire rope and which has a thickness such that a pressure applied from the protective cover to the magnetic sensor is less than a predetermined value.

11 . The wire rope flaw detector according to claim 10 , wherein the magnetic sensor protecting member is arranged at least at one position on each of two sides of the magnetic sensor in an axial direction of the wire rope.

12 . The wire rope flaw detector according to claim 10 , wherein the magnetic sensor protecting member is arranged in a clearance inside the magnetic sensor in an axial direction of the wire rope.

13 . The wire rope flaw detector according to claim 11 , wherein the magnetic sensor protecting member is arranged in a clearance inside the magnetic sensor in an axial direction of the wire rope.

14 . The wire rope flaw detector according to claim 10 , further comprising a support base, which is magnetically insulated from the magnetizer, and on which the magnetic sensor is arranged,
wherein the magnetic sensor protecting member is arranged on the support base.

15 . The wire rope flaw detector according to claim 11 , further comprising a support base, which is magnetically insulated from the magnetizer, and on which the magnetic sensor is arranged,
wherein the magnetic sensor protecting member is arranged on the support base.

16 . The wire rope flaw detector according to claim 12 , further comprising a support base, which is magnetically insulated from the magnetizer, and on which the magnetic sensor is arranged,
wherein the magnetic sensor protecting member is arranged on the support base.

17 . The wire rope flaw detector according to claim 13 , further comprising a support base, which is magnetically insulated from the magnetizer, and on which the magnetic sensor is arranged,
wherein the magnetic sensor protecting member is arranged on the support base.

18 . The wire rope flaw detector according to claim 10 , wherein the magnetic sensor protecting member is arranged in the magnetizer.

19 . The wire rope flaw detector according to claim 11 , wherein the magnetic sensor protecting member is arranged in the magnetizer.

20 . The wire rope flaw detector according to claim 12 , wherein the magnetic sensor protecting member is arranged in the magnetizer.

21 . The wire rope flaw detector according to claim 13 , wherein the magnetic sensor protecting member is arranged in the magnetizer.

22 . The wire rope flaw detector according to claim 10 , wherein the magnetic sensor protecting member is arranged in the protective cover.

23 . The wire rope flaw detector according to claim 11 , wherein the magnetic sensor protecting member is arranged in the protective cover.

24 . The wire rope flaw detector according to claim 12 , wherein the magnetic sensor protecting member is arranged in the protective cover.

25 . The wire rope flaw detector according to claim 13 , wherein the magnetic sensor protecting member is arranged in the protective cover.

26 . The wire rope flaw detector according to claim 10 , wherein the magnetic sensor protecting member is made of a non-magnetic metal material.

27 . The wire rope flaw detector according to claim 10 , wherein the magnetic sensor protecting member is made of a resin material.

28 . The wire rope flaw detector according to claim 10 , wherein the magnetic sensor protecting member is made of a magnetic substance.

Assignees

• Mitsubishi Electric Corp

Inventors

• Hirota Kazuaki
• Yoshioka Takashi
• Takahashi Fumitake
• Seki Tetsuroh

Classifications

• B66B7/123 Primary

  by analysing magnetic variables · CPC title

• B66D1/54

  Safety gear · CPC title

• B66C15/00

  Safety gear (for rope, cable, or chain winding mechanisms B66D1/54) · CPC title

• B66C23/88

  Safety gear (for cranes in general B66C15/00; for rope, cable, or chain winding mechanisms B66D1/54) · CPC title

• G01N27/83 Primary

  by investigating stray magnetic fields · CPC title