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Patent Searching and Data


Title:
ELEVATOR ROPE
Document Type and Number:
WIPO Patent Application WO/2019/049514
Kind Code:
A1
Abstract:
Provided is an elevator rope configured so that, even if the number of ropes is reduced by increasing the breaking strength of the ropes, the amount of variation in rope elongation caused by a variation in rope tension due to the vertical movement of an elevator can be reduced. This elevator rope is formed by twisting a plurality of strands together, the strands each being formed by twisting a plurality of steel wires together. The elevator rope is characterized in that, if the diameter of the elevator rope is designated as d (mm), the distance between strand windings, as a rope pitch P1, and the distance between steel wire windings, as a strand pitch P2, then the radio a of P1 to d, the ratio b of P2 to d, and the breaking strength T (N) of the elevator rope satisfy the following expression A. In the expression A above, E is the modulus of longitudinal elasticity (MPa) of a material used in the elevator rope, G is the modulus of transverse elasticity (MPa) of the material used in the elevator rope, and N is the number of strands.

Inventors:
MAEDA Ryo (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
NAKAYAMA Masato (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
ABE Takashi (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
JP2018/026671
Publication Date:
March 14, 2019
Filing Date:
July 17, 2018
Export Citation:
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Assignee:
HITACHI, LTD. (6-6 Marunouchi 1-chome, Chiyoda-ku Tokyo, 80, 〒1008280, JP)
International Classes:
B66B7/06; D07B1/06
Foreign References:
JP2016094677A2016-05-26
JP2016011481A2016-01-21
JPH05125676A1993-05-21
JP2006052483A2006-02-23
JP2012020793A2012-02-02
JPH02169786A1990-06-29
Attorney, Agent or Firm:
POLAIRE I.P.C. (13-11, Nihonbashikayabacho 2-chome Chuo-k, Tokyo 25, 〒1030025, JP)
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