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Title:
FIBER-REINFORCED PLASTIC SPRING
Document Type and Number:
WIPO Patent Application WO/2012/127994
Kind Code:
A1
Abstract:
Provided is a fiber-reinforced plastic spring with which damage due to compression stress can be prevented. This FRP spring (1) is a plate spring having a laminate structure (20), for example. The laminate structure (20) is a three-layer structure having a first fiber layer (21), a compression-side second fiber layer (22), and an extension-side second fiber layer (23), for example. The first fiber layer (21) has a tensile elastic modulus of E1. The compression-side second fiber layer (22) and the extension-side second fiber layer (23) have a tensile elastic modulus E2 that is smaller than the tensile elastic modulus E1. The first fiber layer (21) has a compression stress region (21A), which is the upper region with respect to the neutral axis Sa, and a tensile stress region (21B), which is the lower region with respect to the neutral axis Sa. With respect to the center in the thickness direction, the neutral axis Sa is positioned closer to the region in which compression stress occurs. Because the thickness from the neutral axis Sa to the surface of the region in which compression stress occurs is less, compression deformation can be reduced when a pulsating bending load is applied.

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Inventors:
SHIGEMATSU RYOHEI (JP)
NAKAZONO MIHO (JP)
Application Number:
PCT/JP2012/054749
Publication Date:
September 27, 2012
Filing Date:
February 27, 2012
Export Citation:
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Assignee:
NHK SPRING CO LTD (JP)
SHIGEMATSU RYOHEI (JP)
NAKAZONO MIHO (JP)
International Classes:
F16F1/18
Foreign References:
JPS5854241A1983-03-31
JP2005521002A2005-07-14
JPS5934036A1984-02-24
JPH0754892A1995-02-28
JPH0727160A1995-01-27
JPS6224039A1987-02-02
JPS5554737A1980-04-22
JPS57110838A1982-07-09
JPH02248728A1990-10-04
JPH0777231A1995-03-20
JP2001523793A2001-11-27
Attorney, Agent or Firm:
SUENARI, Mikio (JP)
End 成 Mikio (JP)
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