Kabushiki Kaisha Kobe Seiko Sho

Kobe Steel, Ltd.

Nihon Tokushu Toryo Co., Ltd.

Toshimitsu Tanaka

Akio Sugimoto

Ichiro Yamagiwa

Hiroki Ueda

Kenji Iwai

Kazuhisa Fujisawa

Toshihiko Sasaki

Mamoru Taniuchi

Kenshi Maekawa

Tadashi Hatayama

Reiji Sanuki

Isamu Ueki

Hiroshi Kawashima

Narikazu Hashimoto

Zenzo Yamaguchi

Koji Fukumoto

Kazuki Tsugihashi

Hiroshi Tanimoto

Yasuo Nanri

Manabu Shibata

Toru Sakatani

Hideo Utsuno

Takashi Oka

Kensuke Tsubota

Naofumi Itano

Hiromichi Okumura

Toshiaki Yasumoto

Syunichi Umemoto

Nobuteru Hayashi

Akibumi Fujiwara

It is an object of the present invention to provide a solid-borne sound reducing structure which is able to reduce solid-borne sound with a simple configuration, highly durable, and being less degraded. There is provided a solid-borne sound reducing structure () in which a surface plate part () including a gas ventilating part () which allows gas to pass through along a thickness direction is disposed by means of an outer peripheral wall part () on a structure () that radiates noise while vibrating, so as to at least partially cover a surface () of the structure (). The surface plate part () is supported by the outer peripheral wall part () so as to be integrally vibrated with the surface () of the structure (). In addition, the outer peripheral wall part () supports the surface plate part () in such a manner that an internal gas chamber is formed between the surface () of the structure () and the surface plate part ().

Solid-borne sound reducing structure

A sound absorbing structure having excellent in sound absorbing performance, which is capable of achieving 0.4 or higher in the sound absorbing coefficient even in the case where a perforated panel is a thin plate such as aluminum foil within a range where a reduction in the weight of a vehicle body is not impaired and through holes have a large hole diameter in order to make the processing of providing a large number of through holes in the perforated panel. The sound absorbing structureis the sound absorbing structurefor suppressing noise generated on a sound source side, which is equipped with: a perforated panelhaving a large number of through holesand a fiber material, which are provided so as to face the sound source side and provided so as to overlap with each other; and an air layerprovided behind the perforated panel, in which the density and the thickness of the fiber materialand the hole diameter and the aperture rate of the through holesof the perforated panelseverally have a specific relationship.

Sound absorbing structure

A perforated soundproof structure is formed by oppositely arranging an external plateand an internal platehaving a number of through-holes. The board thickness, hole diameter and open area ratio of the internal plateare set to satisfy design conditions to give rise to a viscous effect in the air passing through the through-holes, and the design conditions are set so that the frequency bandwidth to attain an absorption coefficient of 0.3 or more is 10% or more of the resonance frequency.

Perforated soundproof structure and method of manufacturing the same

A panel structure for a transport machine is disclosed which is constituted by an integral combination of an outer panel and an inner panel. The inner panel has reinforcing protuberances and recesses, possessing a higher rigidity than the outer panel. The protuberances of the inner panel and a back side of the outer panel are bonded together through insulating layers present on the protuberances.

Panel

Double-walled damping structure

A truss type extruded aluminum section is formed of a pair of planar plates and ribs, wherein hollow portions are formed within said section by the ribs and the planar plates. Vibration-damping resin is provided on the inner surfaces of hollow portions, and particularly on the inner surface of the planar plate and on a single surface of the inclined rib. With this arrangement, the vibration energy bending the planar plate and the rib is converted into a heat energy. In the case of manufacturing such truss type extruded aluminum vibration-damping section, for making easy the insertion of the vibration-damping resin in the hollow portion, the vibration-damping resin is stuck on a plastic film to form a long planar body. The plastic film serves as a cover or an adhesive. Moreover, in the case of directly inserting the vibration-damping resin sheet, the vibration-damping resin sheet is subjected to embossing on the adhesive-bonding side for allowing air to escape. Additionally, in the case using an age-hardening type aluminum alloy, the adhesive-bonding for the vibration-damping resin by heating is performed along with the heat treatment for age-hardening.

Method of manufacturing and using vibration-damping material

The present invention relates to a heat-bonded type vibration-damping resin for a structural member which contains in view of a preferable blending rate asphalt, synthetic rubber, petroleum resin and filler material, and further a heat-bonded type vibration-damping resin for a structural member which contains in view of a preferable blending rate asphalt, filler material, blowing agent. In addition, its basic concept consists in a configuration in which the vibration-damping resin is formed into a sheet and arranged at the surface of the metallic structure used at a place where vibration and noise should be prevented so as to form the vibration-damping structure and a method for manufacturing the vibration-damping structure. The vibration-damping resin can be easily mounted on the surface of the metallic structure having an elongated shape, bonded to it by heating and has a workability in which the mounting work to the metallic plate may be facilitated. In addition, thermoplastic resin and the like can be arranged between the metallic plate and the vibration-damping resin.

Heat bonded type vibration-damping resin for structural member

A vibration-damping section with sound absorbing material includes a sound proof panel, sound absorbing material fixed on one surface thereof and vibration damping material stuck on the top surface or the bottom surface of the sound proof panel one surface of the sound absorbing material which is the opposite side of the sound proof panel can be covered with a porous panel, if necessary, and moreover a joint is provided for hanging and connecting sections for closely connecting themselves one another in a width direction. Since the vibration-damping section with sound absorbing material according to the present invention has above described structure, in particular, it can be fixed on the bottom surface of an elevated bridge and has a sound insulating effect of the radiated noise which are caused by the elevated bridge structure and a sound absorbing effect of the reflected noise and moreover has a vibration damping effect of decreasing occurrence of the secondary noise by reducing the vibration of the sound absorbing panel.

Vibration-damping section with sound absorbing material

A truss type extruded aluminum section (1) is formed of a pair of planar plates (2)(3) and ribs (4)(5)(6), wherein hollow portions (7)(8)(9) are formed within the section (1) by the ribs (4)(5)(6) and the planar plates (2)(3). Vibration-damping resin is provided on the inner surfaces of hollow portions (7)(8)(9), and particularly on the inner surface of the planar plate (3) and on a single surface of the inclined rib (4). With this arrangement, the vibration energy bending the planar plate (3) and the rib (4) is converted into a heat energy. In the case of manufacturing such truss type extruded aluminum vibration-damping section (1), for making easy the insertion of the vibration-damping resin in the hollow portion, the vibration-damping resin is stuck on a plastic film (11) to form a long planar body. The plastic film (11) serves as a cover or an adhesive. Moreover, in the case of directly inserting the vibration-damping resin sheet (14), the vibration-damping resin sheet (14) is subjected to embossing on the adhesive-bonding side for allowing air to escape. Additionally, in the case using an age-hardening type aluminum alloy, the adhesive-bonding for the vibration-damping resin by heating is performed along with the heat treatment for age-hardening.

Vibration-damping material, its manufacturing method, and structural

Growing community of inventors

Kobe, Japan

Toshimitsu Tanaka