Page 58 - Wire Rope News & Sling Technology - June 2019
P. 58

Inventor’s

                      Corner




                        By William Fischer


         Already, we are halfway through 2019.
         It seems like just yesterday, I was
         wishing our readers a happy holiday.
         Anyway, I truly hope all of our readers
         are enjoying the burgeoning of Spring,
         and the nicer weather. As  always, we
         greatly  appreciate  your interest  in the
         column and our publication.






         Wire rope inspection apparatus                       is held by grasping the handle by hand, and the sensor face
         Pat. 10,222,351 U.S. class G01N 27/82 Int. Class G01N 27/82  of the device is pressed against the wire rope.
         Inventor: Johsei Kondoh, Tokyo, JP.                   Figure 1 is a perspective view when a portable rope tester
         Assignee:  TOKYO ROPE MANUFACTURING CO., LTD.,       is viewed from the front. Figure 2 is a plan view of the por-
         Tokyo, JP.                                           table rope tester, and figure 3 is a side view of the portable
           Provided is a wire rope inspection apparatus that is light,   rope tester. A portable rope tester 1, which is used to inspect
         small in size and portable. A portable rope tester has a sen-  a wire rope 2 and, more particularly, to detect damage (in-
         sor device for sensing magnetic leakage flux leaking from a   clusive of severance) of the wire rope 2, has a sensor device
         magnetized wire rope. Provided on the front of sensor device   10, brackets 21, 22 provided on the back side of the sensor
         is a sensor face formed to be flat. The sensor face is pressed   device  10,  and a handle  23.  The  portable rope  tester  1  is
         against  the  wire  rope.  By  pressing  the  flat  sensor  face   comparatively light and is portable.
         against  the  wire  rope,  magnetic  leakage  flux  is  sensed  by   Although the details will  be described later, the sensor
         the sensor device and whether the wire rope is damaged or   device 10 has a sensing coil. Electromotive force, which is
         not is detected. A handle is secured to the back of the sensor   generated in the sensing coil due to a change in magnetic
         device on the side opposite the sensor face. The sensor device   flux from the wire rope 2 passing through the sensing coil,
                                                              is used to determine whether the wire rope 2 has sustained
                                                              damage. It is necessary, therefore, to move either the sensor
                                                              device 10 (rope tester 1) or the wire rope 2. If the wire rope
                                                              2 inspected is a wire rope used in an elevator, for example,




























         Figure 1: Perspective view of a portable rope tester.  Figure 2: Plan view of a portable rope tester.

         58     Wire Rope News & Sling Technology   June 2019
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