Method and arrangement

Patent metadata

Field	Value
Publication number	US-10029888-B2
Application number	US-201514945187-A
Country	US
Kind code	B2
Filing date	Nov 18, 2015
Priority date	Dec 1, 2014
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A method is provided for manufacturing an electrical contact arrangement on an end of a hoisting rope of a hoisting apparatus, which hoisting rope includes a non-conductive coating, and a plurality of adjacent conductive load bearing members for bearing the load exerted on the rope in a longitudinal direction thereof embedded in the coating and extending parallel to each other and to the longitudinal direction of the hoisting rope unbroken throughout the length of the rope, the coating forming the surface of the hoisting rope and extending between adjacent load bearing members thereby isolating them from each other, in which method a conductive plate element is placed beside the end of the hoisting rope; and the conductive plate element is attached immovably beside the end of the hoisting rope with at least one threaded screw member made of conductive material by screwing the threaded screw member into the hoisting rope such that it extends centrally between load bearing members next to each other, and such that the threads thereof are in contact with both of said load bearing members next to each other, the conductive plate element being thereby brought to be in conductive connection with both of said load bearing members next to each other via said at least one screw member.

First claim

The invention claimed is:

1. A method for manufacturing an electrical contact arrangement on an end of a hoisting rope of a hoisting apparatus, which hoisting rope comprises a non-conductive coating, and a plurality of adjacent conductive load bearing members for bearing the load exerted on the hoisting rope in a longitudinal direction thereof embedded in the coating and extending parallel to each other and to the longitudinal direction of the hoisting rope unbroken throughout the length of the hoisting rope, the coating forming the surface of the hoisting rope and extending between adjacent load bearing members thereby isolating them from each other, said method comprising the steps of:
placing a conductive plate element beside the end of the hoisting rope; and
attaching the conductive plate element immovably beside the end of the hoisting rope with at least one threaded screw member made of conductive material by screwing the at least one threaded screw member into the hoisting rope such that the at least one threaded screw member extends centrally between load bearing members next to each other, and such that the threads thereof are in contact with both of said load bearing members next to each other, the conductive plate element being thereby brought to be in conductive connection with both of said load bearing members next to each other via said at least one threaded screw member.

2. The method according to claim 1 , wherein said at least one threaded screw member is screwed to compress with its screw head directly the conductive plate element, or indirectly via only conductive members.

3. The method according to claim 1 , wherein before said placing and screwing, a hole is pre-drilled into the coating, which hole extends centrally between the load bearing members next to each other, and in said screwing the at least one threaded screw member is screwed into the pre-drilled hole.

4. The method according to claim 1 , wherein before said pre-drilling, the hoisting rope is mounted on a jig comprising a plurality of stop faces configured to accurately place the hoisting rope relative to the jig when the hoisting rope is mounted on the jig, and the hole is pre-drilled into the coating while the rope is mounted on the jig.

5. The method according to claim 4 , wherein said jig comprises one or more guide holes for guiding a drill bit of a drill, and each said pre-drilling is carried out by drilling through a guide hole while the rope is mounted on the jig.

6. The method according to claim 4 , wherein said plurality of stop faces comprised in the jig are configured to accurately place the rope relative to the jig such that when the rope is mounted on the jig each guide hole points towards the center of the gap between load bearing members which are next to each other.

7. The method according to claim 1 , wherein said rope is belt-shaped.

8. The method according to claim 4 , wherein said mounting comprises tightening the hoisting rope immovably on the jig, in particular against stop faces of the jig.

9. The method according to claim 1 , wherein said method further comprises placing beside the end of the hoisting rope one or more plate elements, said one or more plate elements including at least the conductive plate element, and said screwing is carried out while the rope and said one or more plate elements placed beside the end thereof, including the conductive plate element, are mounted on the jig.

10. An electrical contact arrangement on an end of a hoisting rope of a hoisting apparatus, which hoisting rope comprises a non-conductive coating, and a plurality of adjacent conductive load bearing members for bearing the load exerted on the hoisting rope in longitudinal direction thereof embedded in the coating and extending parallel to each other and to the longitudinal direction of the hoisting rope unbroken throughout the length of the rope, the coating forming the surface of the hoisting rope and extending between adjacent load bearing members thereby isolating them from each other, which electrical contact arrangement comprising:
a conductive plate element beside the end of the hoisting rope; and
at least one threaded screw member attaching the conductive plate element immovably beside the end of the hoisting rope, which at least one threaded screw member has been screwed into the rope such that the at least one threaded screw member extends centrally between load bearing members next to each other, the threads thereof being in contact with both of said load bearing members next to each other, the at least on threaded screw member being made of conductive material, and the conductive plate element is in conductive connection with both of said load bearing members next to each other via said at least one threaded screw member.

11. The electrical contact arrangement according to claim 10 , wherein said at least one threaded screw member has a screw-head compressed against the conductive plate element directly or indirectly via only conductive members.

12. An electrical contact arrangement on an end of a hoisting rope of a hoisting apparatus, which hoisting rope comprises a non-conductive coating, and a plurality of adjacent conductive load bearing members for bearing the load exerted on the hoisting rope in longitudinal direction thereof embedded in the coating and extending parallel to each other and to the longitudinal direction of the hoisting rope unbroken throughout the length of the rope, the coating forming the surface of the hoisting rope and extending between adjacent load bearing members thereby isolating them from each other, which electrical contact arrangement comprising:
a conductive plate element beside the end of the hoisting rope; and
at least one threaded screw member attaching the conductive plate element immovably beside the end of the hoisting rope, which at least one threaded screw member has been screwed into the rope such that the at least one threaded screw member extends centrally between load bearing members next to each other, the threads thereof being in contact with both of said load bearing members next to each other, the at least one threaded screw member being made of conductive material, and the conductive plate element is in conductive connection with both of said load bearing members next to each other via said at least one threaded screw member,
wherein electrical contact arrangement has been obtained with the method according to claim 1 .

13. An arrangement for condition monitoring of a hoisting rope of a hoisting apparatus, wherein load bearing members of the hoisting rope that are next to each other, are in conductive connection with each other and form part of an electrical circuit whereto a source of electricity is connected, which arrangement for condition monitoring comprising:
a monitoring unit for monitoring one or more electrical parameters of the electrical circuit so as to determine a condition of the circuit, the condition monitoring unit being configured to deduce the condition of the load bearing members of the hoisting rope based on the condition of the circuit, the arrangement comprising on at least one end of the hoisting rope the electrical contact arrangement as defined in claim 10 connecting said load bearing members of the hoisting rope that are next to each other to be in conductive connection with each other.

14. The arrangement for condition monitoring of a hoisting rope of a hoisting apparatus according to claim 13 , wherein said conductive plate element of the electrical contact arrangement is a contact element directly coupled with a contact element of a source of electricity.

Assignees

• Kone Corp

Inventors

• Lehtinen Hannu
• Hallikainen Pekka

Classifications

• B66B1/34 Primary

  Details {, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system} · CPC title

• H01R13/207

  by screw-in connection · CPC title

• H01R13/639

  Additional means for holding or locking coupling parts together, after engagement, {e.g. separate keylock, retainer strap} · CPC title

• B66B7/085

  Belt termination devices · CPC title

• B66B7/1223 Primary

  by analysing electric variables · CPC title