PROBLEM TO BE SOLVED: To simply and inexpensively provide means to reduce noise in an elevator car effectively and stably by suppressing acoustic standing waves which occur in the elevator car; and to provide a structure which achieves the means.SOLUTION: Supposing that the shape of a ceiling surface as looked up from the inside of a car 20 composed of six surfaces (a floor surface, a ceiling surface, a front surface, a back surface, and both right and left side surfaces) is substantially rectangular, openings 32a are disposed on four apex parts of the rectangle, and cavities 32 are disposed on the back side of the openings 32a as viewed from the inside of the car 20. Secondary sound waves for control are output to the insides of the cavities 32, and the secondary sound waves for control are radiated to the inside of the car 20 from each of the openings 32a disposed on the four apex parts on the ceiling surface.SELECTED DRAWING: Figure 1
【課題】 エレベータかご内に発生する音響定在波を抑制することでかご内騒音を効果的に且つ安定的に低減する手段およびそれを実現する構造について、簡便でかつ安価に提供する。【解決手段】 床面、天井面、前面、背面および左右両側面の6面で構成されたかご20の内側から見上げた天井面の形状を略4角形と見立てたときに、この4角形の4つの頂点部に開口部32aを設けるとともに、開口部32aのかご20内側から見た裏側に空洞部32とを設け、空洞部32の内部に対して制御用二次音波を出力して、天井面の4つの頂点に設けられた開口部32aそれぞれからかご20内に対して制御用二次音波を放射する。【選択図】 図1
ELEVATOR DEVICE AND METHOD FOR REDUCING NOISE IN CAR
エレベータ装置及びかご内騒音低減方法
2016-05-09
Patent
Elektronische Ressource
Japanisch
ELEVATOR MACHINE FRAME WITH NOISE REDUCING CONFIGURATION
Europäisches Patentamt | 2017
|Sound insulating and noise reducing device for elevator car
Europäisches Patentamt | 2020
|