TW201919921A - A bicycle rim - Google Patents

Abstract

A bicycle rim 7 comprises a radially outer perimeter portion 11, a radially inner perimeter portion 13, a fist side wall 15, and a first anodized oxide layer 17. The first anodized oxide layer 17 on a first brake surface 15a has a first roughness Ra that is equal to or larger than 10 micrometer. The first anodized oxide layer 17 on a first non-brake surface 15b has a first glossiness Gs (60 deg.) that is equal to or larger than 5.

Description

Bicycle rim

The technology disclosed herein relates to bicycle rims.

Cycling is becoming an increasingly more popular form of entertainment and transportation. In addition, cycling has become a very popular competitive sport for both amateurs and professionals.

Whether the bicycle is used for recreation, transportation or competition, the bicycle industry is continuously improving the various components of the bicycle. One type of bicycle component that has been widely redesigned is a bicycle rim. The bicycle rim is constructed to contact the brake pads of a bicycle.

According to a first aspect of the invention, a bicycle rim has a rotation center axis. The bicycle rim includes a radially outer peripheral portion, a radially inner peripheral portion, a first side wall, and a first anodized layer.

The radially inner peripheral portion is positioned radially inward from the radially outer peripheral portion with respect to the rotation center axis. The first side wall is made of aluminum. The first side wall extends between a radially outer peripheral portion and a radially inner peripheral portion.

The first side wall includes a first braking surface, and a first non-braking surface positioned radially inward from the first braking surface with respect to the rotation center axis.

The first anodized layer is disposed on the first braking surface and the first non-braking surface. The first anodized layer on the first braking surface has a first roughness Ra equal to or greater than 10 micrometers. The first anodized layer on the first non-braking surface has a first glossiness Gs (60 degrees) of 5 or more.

With the bicycle rim according to the first aspect, the bicycle rim can improve the heat dissipation of the first braking surface and the braking performance of the first braking surface under wet conditions, because the first roughness Ra is equal to or greater than 10 microns.

Also, the bicycle rim can improve the design properties and drainage of the first non-braking surface, because the first glossiness Gs (60 degrees) is equal to or greater than 5.

According to a second aspect of the present invention, the bicycle rim according to the first aspect further includes a second side wall and a second anodized layer.

The second side wall is made of aluminum. The second side wall is spaced from the first side wall in the axial direction with respect to the rotation center axis. The second side wall extends between the radially outer peripheral portion and the radially inner peripheral portion.

The second side wall includes a second braking surface, and a second non-braking surface positioned radially inward from the second braking surface with respect to the rotation center axis.

A second anodized layer is disposed on the second braking surface and the second non-braking surface. The second anodized layer on the second braking surface has a second roughness Ra of 10 μm or more. The second anodized layer on the second non-braking surface has a second glossiness Gs (60 degrees) of 5 or more.

With the bicycle rim according to the second aspect, the bicycle rim can improve the heat dissipation of the second braking surface and the braking performance of the second braking surface under wet conditions, because the second roughness Ra is equal to or greater than 10 microns.

In addition, the bicycle rim can improve the design properties and drainage of the second non-braking surface because the second glossiness Gs (60 degrees) is equal to or greater than 5.

According to a third aspect of the invention, the bicycle rim according to the first or second aspect is constructed so that the first roughness Ra is equal to or greater than 15 micrometers.

With the bicycle rim according to the third aspect, the bicycle rim can further improve heat dissipation of the first braking surface and braking performance of the first braking surface under wet conditions.

According to a fourth aspect of the present invention, the bicycle rim according to any one of the first to third aspects is constructed so that the first glossiness Gs (60 degrees) is equal to or greater than 20.

With the bicycle rim according to the fourth aspect, the bicycle rim can further improve the design properties and drainage of the first non-braking surface.

According to a fifth aspect of the present invention, the bicycle rim according to the second aspect is constructed so that the second roughness Ra is equal to or greater than 15 micrometers.

With the bicycle rim according to the fifth aspect, the bicycle rim can further improve heat dissipation of the second braking surface and braking performance of the second braking surface under wet conditions.

According to a sixth aspect of the present invention, the bicycle rim according to the second or fifth aspect is constructed so that the second glossiness Gs (60 degrees) is equal to or greater than 20.

With the bicycle rim according to the sixth aspect, the bicycle rim can further improve the design properties and drainage of the second non-braking surface.

According to a seventh aspect of the present invention, the bicycle rim according to any one of the second, fifth, and sixth aspects is constructed such that the first anodized layer and the second anodized layer are connected via a radially inner peripheral portion. To each other.

With the bicycle rim according to the seventh aspect, the bicycle rim can improve manufacturing efficiency because the first anodized layer and the second anodized layer are provided on the first braking surface and the second braking surface by a single procedure, respectively.

According to an eighth aspect of the present invention, the bicycle rim according to any one of the first to seventh aspects is constructed such that at least one first groove is formed on the first braking surface.

With the bicycle rim according to the eighth aspect, the bicycle rim can further improve the braking performance of the first braking surface under wet conditions.

According to a ninth aspect of the present invention, the bicycle rim according to the eighth aspect is constructed such that at least one first groove is a single spiral groove.

With the bicycle rim according to the ninth aspect, the bicycle rim can further improve the braking performance of the first braking surface under wet conditions.

According to a tenth aspect of the present invention, the bicycle rim according to any one of the second, fifth, sixth, and seventh aspects is constructed such that at least one second groove is formed on the second braking surface.

With the bicycle rim according to the tenth aspect, the bicycle rim can further improve the braking performance of the second braking surface under wet conditions.

According to an eleventh aspect of the present invention, the bicycle rim according to the tenth aspect is constructed such that at least one second groove is a single spiral groove.

With the bicycle rim according to the eleventh aspect, the bicycle rim can further improve the braking performance of the second braking surface under wet conditions.

According to a twelfth aspect of the present invention, a bicycle rim has a rotation center axis. The bicycle rim includes a radially outer peripheral portion, a radially inner peripheral portion, a first side wall, a first radially outer anodized layer, and a first radially inner anodized layer.

The radially inner peripheral portion is positioned radially inward from the radially outer peripheral portion with respect to the rotation center axis. The first side wall is made of aluminum. The first side wall extends between a radially outer peripheral portion and a radially inner peripheral portion.

The first side wall includes a first braking surface, and a first non-braking surface positioned radially inward from the first braking surface with respect to the rotation center axis.

A first radially outer anodized layer is disposed on the first braking surface. The first radially outer anodized layer has a first layer thickness. A first radially inner anodized layer is disposed on the first non-braking surface. The first radially inner anodized layer has a second layer thickness that is less than the thickness of the first layer.

With the bicycle rim according to the twelfth aspect, the bicycle rim can improve the abrasion resistance of the first braking surface because the thickness of the first layer is greater than the thickness of the second layer.

Also, the bicycle rim can improve the fatigue strength of the first non-braking surface because the thickness of the second layer is smaller than the thickness of the first layer.

According to a thirteenth aspect of the present invention, the bicycle rim according to the twelfth aspect is constructed such that the thickness of the first layer is equal to or greater than 30 micrometers and equal to or smaller than 100 micrometers.

With the bicycle rim according to the thirteenth aspect, the bicycle rim can improve the abrasion resistance of the first braking surface.

According to a fourteenth aspect of the present invention, the bicycle rim according to the twelfth or thirteenth aspect is constructed so that the thickness of the second layer is equal to or greater than 2.5 microns and equal to or less than 10 microns.

With the bicycle rim according to the fourteenth aspect, the bicycle rim can improve the fatigue strength of the first non-braking surface.

According to a fifteenth aspect of the present invention, the bicycle rim according to any one of the twelfth to fourteenth aspects further includes a second side wall, a second radially outer anodized layer, and a second radially inner anodized layer .

The second side wall is made of aluminum. The second side wall is spaced from the first side wall in the axial direction with respect to the rotation center axis. The second side wall extends between the radially outer peripheral portion and the radially inner peripheral portion.

The second side wall includes a second braking surface, and a second non-braking surface positioned radially inward from the second braking surface with respect to the rotation center axis.

A second radially outer anodized layer is disposed on the second braking surface. The second radially outer anodized layer has a third layer thickness. A second radially inner anodized layer is disposed on the second non-braking surface. The second radially inner anodized layer has a fourth layer thickness that is less than the third layer thickness.

With the bicycle rim according to the fifteenth aspect, the bicycle rim can improve the wear resistance of the second braking surface because the thickness of the third layer is greater than the thickness of the fourth layer.

Also, the bicycle rim can improve the fatigue strength of the second non-braking surface because the thickness of the fourth layer is smaller than the thickness of the third layer.

According to a sixteenth aspect of the present invention, the bicycle rim according to the fifteenth aspect is constructed so that the thickness of the third layer is equal to or greater than 30 micrometers and equal to or smaller than 100 micrometers.

With the bicycle rim according to the sixteenth aspect, the bicycle rim can improve the abrasion resistance of the second braking surface.

According to a seventeenth aspect of the present invention, the bicycle rim according to the fifteenth or sixteenth aspect is constructed so that the thickness of the fourth layer is 2.5 μm or more and 10 μm or less.

With the bicycle rim according to the seventeenth aspect, the bicycle rim can improve the fatigue strength of the second non-braking surface.

According to an eighteenth aspect of the present invention, the bicycle rim according to any one of the twelfth to seventeenth aspects is constructed such that the first radially outer anodized layer is different from the first radially inner anodized layer.

With the bicycle rim according to the eighteenth aspect, it is possible to make a difference between the characteristics of the first braking surface and the characteristics of the first non-braking surface.

According to a nineteenth aspect of the present invention, the bicycle rim according to any one of the fifteenth to seventeenth aspects is constructed such that the second radially outer anodized layer is different from the second radially inner anodized layer.

With the bicycle rim according to the nineteenth aspect, it is possible to make a difference between the characteristics of the second braking surface and the characteristics of the second non-braking surface.

According to a twentieth aspect of the present invention, the bicycle rim according to the fifteenth aspect is constructed such that the first radially outer anodized layer is different from the first radially inner anodized layer. The second radially outer anodized layer is different from the second radially inner anodized layer.

With the bicycle rim according to the twentieth aspect, it is possible to make a difference between the characteristics of the first braking surface and the second braking surface and the characteristics of the first non-braking surface and the second non-braking surface.

According to a twenty-first aspect of the present invention, the bicycle rim according to any one of the twelfth to twentieth aspects is constructed such that at least one first groove is formed on the first braking surface.

With the bicycle rim according to the twenty-first aspect, the bicycle rim can improve the braking performance of the first braking surface under wet conditions.

According to a twenty-second aspect of the present invention, the bicycle rim according to the twenty-first aspect is constructed such that at least one first groove is a single spiral groove.

With the bicycle rim according to the twenty-second aspect, the bicycle rim can further improve the braking performance of the first braking surface under wet conditions.

According to a twenty-third aspect of the present invention, the bicycle rim according to any one of the fifteenth, sixteenth, seventeenth, and nineteenth aspects is constructed such that at least one second groove is formed in the second On the braking surface.

With the bicycle rim according to the twenty-third aspect, the bicycle rim can improve the braking performance of the second braking surface under wet conditions.

According to a twenty-fourth aspect of the present invention, the bicycle rim according to the twenty-third aspect is constructed such that at least one second groove is a single spiral groove.

With the bicycle rim according to the twenty-fourth aspect, the bicycle rim can further improve the braking performance of the second braking surface under wet conditions.

According to a twenty-fifth aspect of the present invention, a bicycle rim has a rotation center axis. The bicycle rim includes a radially outer peripheral portion, a radially inner peripheral portion, a first side wall, a first radially outer anodized layer, and a first radially inner anodized layer.

The radially inner peripheral portion is positioned radially inward from the radially outer peripheral portion with respect to the rotation center axis. The first side wall is made of aluminum. The first side wall extends between a radially outer peripheral portion and a radially inner peripheral portion.

The first side wall includes a first braking surface, and a first non-braking surface positioned radially inward from the first braking surface with respect to the rotation center axis.

A first radially outer anodized layer is disposed on the first braking surface. The first radially outer anodized layer has a first thermal-emissivity. A first radially inner anodized layer is disposed on the first non-braking surface. The first radially inner anodized layer has a second thermal emissivity that is greater than the first thermal emissivity.

With the bicycle rim according to the twenty-fifth aspect, the bicycle rim can improve heat dissipation from the first braking surface and the first non-braking surface. Because the first radially outer anodized layer has a first thermal emissivity and the first radially inner anodized layer has a second thermal emissivity greater than the first thermal emissivity, the thermal energy of the first braking surface passes through the first non-braking surface. While being radiated.

According to a twenty-sixth aspect of the present invention, the bicycle rim according to the twenty-fifth aspect is constructed so that the first thermal emissivity is less than 81%.

With the bicycle rim according to the twenty-sixth aspect, the thermal energy of the first braking surface is radiated via the first non-braking surface.

According to a twenty-seventh aspect of the present invention, the bicycle rim according to the twenty-fifth or twenty-sixth aspect is constructed so that the second thermal emissivity is equal to or greater than 81%.

With the bicycle rim according to the twenty-seventh aspect, the bicycle rim can improve heat dissipation from the first braking surface and the first non-braking surface.

According to a twenty-eighth aspect of the present invention, the bicycle rim according to any one of the twenty-fifth to twenty-seventh aspects further includes a second side wall, a second radially outer anodized layer, and a second radially inner side Anodized layer.

The second side wall is made of aluminum. The second side wall is spaced from the first side wall in the axial direction with respect to the rotation center axis. The second side wall extends between the radially outer peripheral portion and the radially inner peripheral portion.

The second side wall includes a second braking surface, and a second non-braking surface positioned radially inward from the second braking surface with respect to the rotation center axis.

A second radially outer anodized layer is disposed on the second braking surface. The second radially outer anodized layer has a third thermal emissivity. A second radially inner anodized layer is disposed on the second non-braking surface. The second radially inner anodized layer has a fourth thermal emissivity that is greater than the third thermal emissivity.

With the bicycle rim according to the twenty-eighth aspect, the bicycle rim can improve heat dissipation from the second braking surface and the second non-braking surface. Because the second radially outer anodized layer has a third thermal emissivity and the second radially inner anodized layer has a fourth thermal emissivity, the thermal energy of the second braking surface is radiated via the second non-braking surface.

According to a twenty-ninth aspect of the present invention, the bicycle rim according to the twenty-eighth aspect is constructed so that the third thermal emissivity is less than 81%.

With the bicycle rim according to the twenty-ninth aspect, the thermal energy of the second braking surface is radiated via the second non-braking surface.

According to a thirtieth aspect of the present invention, the bicycle rim according to the twenty-eighth or twenty-ninth aspect is constructed so that the fourth thermal emissivity is equal to or greater than 81%.

With the bicycle rim according to the thirtieth aspect, the bicycle rim can improve heat dissipation from the second braking surface and the second non-braking surface.

According to a thirty-first aspect of the present invention, the bicycle rim according to any one of the twenty-fifth to thirty aspects is constructed such that the first radially outer anodized layer is different from the first radially inner anodized layer. .

With the bicycle rim according to the thirty-first aspect, it is possible to make a difference between the characteristics of the first braking surface and the characteristics of the first non-braking surface.

According to a thirty-second aspect of the present invention, the bicycle rim according to any one of the twenty-eighth to thirty aspects is constructed such that the second radially outer anodized layer is different from the second radially inner anodized layer .

With the bicycle rim according to the thirty-second aspect, it is possible to make a difference between the characteristics of the second braking surface and the characteristics of the second non-braking surface.

According to a thirty-third aspect of the present invention, the bicycle rim according to the twenty-eighth aspect is constructed such that the first radially outer anodized layer is different from the first radially inner anodized layer. The second radially outer anodized layer is different from the second radially inner anodized layer.

With the bicycle rim according to the thirty-third aspect, it is possible to make a difference between the characteristics of the first braking surface and the second braking surface and the characteristics of the first non-braking surface and the second non-braking surface.

According to a thirty-fourth aspect of the present invention, the bicycle rim according to any one of the twenty-fifth to thirty-third aspects is constructed such that at least one first groove is formed on the first braking surface.

With the bicycle rim according to the thirty-fourth aspect, the bicycle rim can improve the braking performance of the first braking surface under wet conditions.

According to a thirty-fifth aspect of the present invention, the bicycle rim according to the thirty-fourth aspect is constructed such that at least one first groove is a single spiral groove.

With the bicycle rim according to the thirty-fifth aspect, the bicycle rim can further improve the braking performance of the first braking surface under wet conditions.

According to a thirty-sixth aspect of the present invention, a bicycle rim according to any one of the twenty-eighth, twenty-ninth, thirty, and thirty-second aspects is constructed such that at least one second groove is formed On the second braking surface.

With the bicycle rim according to the thirty-sixth aspect, the bicycle rim can improve the braking performance of the second braking surface under wet conditions.

According to a thirty-seventh aspect of the present invention, the bicycle rim according to the thirty-sixth aspect is constructed such that at least one second groove is a single spiral groove.

With the bicycle rim according to the thirty-seventh aspect, the bicycle rim can further improve the braking performance of the second braking surface under wet conditions.

According to a thirty-eighth aspect of the present invention, a bicycle rim has a rotation center axis. The bicycle rim includes a radially outer peripheral portion, a radially inner peripheral portion, a first side wall, a first radially outer anodized layer, and a first radially inner anodized layer.

The radially inner peripheral portion is positioned radially inward from the radially outer peripheral portion with respect to the rotation center axis. The first side wall is made of aluminum. The first side wall extends between a radially outer peripheral portion and a radially outer peripheral portion.

The first side wall includes a first braking surface, and a first non-braking surface positioned radially inward from the first braking surface with respect to the rotation center axis.

A first radially outer anodized layer is disposed on the first braking surface. The first radially outer anodized layer has a first hardness. A first radially inner anodized layer is disposed on the first non-braking surface. The first radially inner anodized layer has a second hardness that is less than the first hardness.

With the bicycle rim according to the thirty-eighth aspect, the bicycle rim can improve the abrasion resistance of the first braking surface because the first hardness is greater than the second hardness.

Also, the bicycle rim can improve the fatigue strength of the first non-braking surface because the second hardness is less than the first hardness.

According to a 39th aspect of the present invention, the bicycle rim according to the 38th aspect is constructed such that the first hardness is equal to or greater than 300 Hv and equal to or less than 600 Hv.

With the bicycle rim according to the thirty-ninth aspect, the bicycle rim can improve the abrasion resistance of the first braking surface.

According to a fortieth aspect of the present invention, the bicycle rim according to the thirty-eighth or thirty-ninth aspect is constructed so that the second hardness is equal to or greater than 150 Hv and equal to or less than 250 Hv.

With the bicycle rim according to the fortieth aspect, the bicycle rim can improve the fatigue strength of the first non-braking surface.

According to a forty-first aspect of the present invention, the bicycle rim according to any one of the thirty-eighth to fortieth aspects further includes a second side wall, a second radially outer anodized layer, and a second radially inner anode. Oxide layer.

The second side wall is made of aluminum. The second side wall is spaced from the first side wall in the axial direction with respect to the rotation center axis. The second side wall extends between the radially outer peripheral portion and the radially inner peripheral portion.

The second side wall includes a second braking surface, and a second non-braking surface positioned radially inward from the second braking surface with respect to the rotation center axis.

A second radially outer anodized layer is disposed on the second braking surface. The second radially outer anodized layer has a third hardness. A second radially inner anodized layer is disposed on the second non-braking surface. The second radially inner anodized layer is provided with a fourth hardness that is less than the third hardness.

With the bicycle rim according to the forty-first aspect, the bicycle rim can improve the wear resistance of the second braking surface because the third hardness is greater than the fourth hardness.

Also, the bicycle rim can improve the fatigue strength of the second non-braking surface because the fourth hardness is less than the third hardness.

According to a forty-second aspect of the present invention, the bicycle rim according to the forty-first aspect is constructed so that the third hardness is equal to or greater than 300 Hv and equal to or less than 600 Hv.

With the bicycle rim according to the forty-second aspect, the bicycle rim can improve the abrasion resistance of the second braking surface.

According to a forty-third aspect of the present invention, the bicycle rim according to the forty-first or forty-second aspect is constructed so that the fourth hardness is equal to or greater than 150 Hv and equal to or less than 250 Hv.

With the bicycle rim according to the forty-third aspect, the bicycle rim can improve the fatigue strength of the second non-braking surface.

According to a forty-fourth aspect of the present invention, the bicycle rim according to any one of the thirty-eighth to forty-third aspects is constructed such that the first radially outer anodized layer and the first radially inner anodized layer different.

With the bicycle rim according to the forty-fourth aspect, it is possible to make a difference between the characteristics of the first braking surface and the characteristics of the first non-braking surface.

According to a forty-fifth aspect of the present invention, the bicycle rim according to any one of the forty-first to forty-third aspects is constructed such that the second radially outer anodized layer and the second radially inner anodized layer different.

With the bicycle rim according to the forty-fifth aspect, it is possible to make a difference between the characteristics of the second braking surface and the characteristics of the second non-braking surface.

According to a forty-sixth aspect of the present invention, the bicycle rim according to the forty-first aspect is constructed such that the first radially outer anodized layer is different from the first radially inner anodized layer. The second radially outer anodized layer is different from the second radially inner anodized layer.

With the bicycle rim according to the forty-sixth aspect, it is possible to make a difference between characteristics of the first braking surface and the second braking surface and characteristics of the first non-braking surface and the second non-braking surface.

According to a forty-seventh aspect of the present invention, the bicycle rim according to any one of the thirty-eighth to forty-sixth aspects is constructed such that at least one first groove is formed on the first braking surface.

With the bicycle rim according to the forty-seventh aspect, the bicycle rim can improve the braking performance of the first braking surface under wet conditions.

According to a forty-eighth aspect of the present invention, the bicycle rim according to the forty-seventh aspect is constructed such that at least one first groove is a single spiral groove.

With the bicycle rim according to the forty-eighth aspect, the bicycle rim can further improve the braking performance of the first braking surface under wet conditions.

According to a forty-ninth aspect of the present invention, the bicycle rim according to any one of the forty-first, forty-second, forty-third, and forty-fifth aspects is constructed such that at least one second groove is Formed on the second braking surface.

With the bicycle rim according to the forty-ninth aspect, the bicycle rim can improve the braking performance of the second braking surface under wet conditions.

According to a fiftieth aspect of the present invention, the bicycle rim according to the forty-ninth aspect is constructed such that at least one second groove is a single spiral groove.

With the bicycle rim according to the fiftieth aspect, the bicycle rim can further improve the braking performance of the second braking surface under wet conditions.

According to a fifty-first aspect of the present invention, a bicycle rim has a rotation center axis. The bicycle rim includes a radially outer peripheral portion, a radially inner peripheral portion, a first side wall, a first radially outer anodized layer, and a first radially inner anodized layer.

The radially inner peripheral portion is positioned radially inward from the radially outer peripheral portion with respect to the rotation center axis. The first side wall is made of aluminum. The first side wall extends between a radially outer peripheral portion and a radially inner peripheral portion.

The first side wall includes a first braking surface, and a first non-braking surface positioned radially inward from the first braking surface with respect to the rotation center axis.

A first radially outer anodized layer is disposed on the first braking surface. The first radially outer anodized layer has a first brightness (L *). A first radially inner anodized layer is disposed on the first non-braking surface. The first radially inner anodized layer has a second brightness (L *) that is less than the first brightness (L *).

With the bicycle rim according to the fifty-first aspect, the bicycle rim can transfer heat generated on the first braking surface from the first braking surface to the first non-braking surface. Because the first radially outer anodized layer has a first brightness and the first radially inner anodized layer has a second brightness that is less than the first brightness, the thermal energy of the first braking surface is radiated via the first non-braking surface.

According to a fifty-second aspect of the present invention, the bicycle rim according to the fifty-first aspect is constructed so that the first brightness (L *) is equal to or greater than 26.5 and equal to or less than 35.

With the bicycle rim according to the fifty-second aspect, the bicycle rim can transfer heat from the first braking surface to the first non-braking surface.

According to a fifty-third aspect of the present invention, the bicycle rim according to the fifty-first or fifty-second aspect is constructed so that the second brightness (L *) is equal to or greater than 20 and equal to or less than 26.

With the bicycle rim according to the fifty-third aspect, the bicycle rim can further transfer heat from the first braking surface to the first non-braking surface.

According to a fifty-fourth aspect of the present invention, the bicycle rim according to any one of the fifty-first to fifty-third aspects further includes a second side wall, a second radially outer anodized layer, and a second radially inner side. Anodized layer.

The second side wall is made of aluminum. The second side wall is spaced from the first side wall in the axial direction with respect to the rotation center axis. The second side wall extends between the radially outer peripheral portion and the radially inner peripheral portion.

The second side wall includes a second braking surface, and a second non-braking surface positioned radially inward from the second braking surface with respect to the rotation center axis.

A second radially outer anodized layer is disposed on the second braking surface. The second radially outer anodized layer has a third brightness (L *). A second radially inner anodized layer is disposed on the second non-braking surface. The second radially inner anodized layer has a fourth brightness (L *) that is less than a third brightness (L *).

With the bicycle rim according to the fifty-fourth aspect, the bicycle rim can transfer heat generated on the second braking surface from the second braking surface to the second non-braking surface. Because the second radially outer anodized layer has a third brightness and the second radially inner anodized layer has a fourth brightness that is less than the second brightness, the thermal energy of the second braking surface is radiated via the second non-braking surface.

According to a fifty-fifth aspect of the present invention, the bicycle rim according to the fifty-fourth aspect is constructed so that the third brightness (L *) is equal to or greater than 26.5 and equal to or less than 35.

With the bicycle rim according to the fifty-fifth aspect, the bicycle rim can transfer heat from the second braking surface to the second non-braking surface.

According to a fifty-sixth aspect of the present invention, the bicycle rim according to the fifty-fourth or fifty-fifth aspect is constructed so that the fourth brightness (L *) is equal to or greater than 20 and equal to or less than 26.

With the bicycle rim according to the fifty-sixth aspect, the bicycle rim can further transfer heat from the second braking surface to the second non-braking surface.

According to a fifty-seventh aspect of the invention, the bicycle rim according to any one of the fifty-first to fifty-sixth aspects is constructed such that the first radially outer anodized layer and the first radially inner anodized layer different.

With the bicycle rim according to the fifty-seventh aspect, it is possible to make a difference between the characteristics of the first braking surface and the characteristics of the first non-braking surface.

According to a fifty-eighth aspect of the present invention, the bicycle rim according to any one of the fifty-fourth to fifty-sixth aspects is constructed such that the second radially outer anodized layer and the second radially inner anodized layer different.

With the bicycle rim according to the fifty-eighth aspect, it is possible to make a difference between the characteristics of the second braking surface and the characteristics of the second non-braking surface.

According to a fifty-ninth aspect of the present invention, the bicycle rim according to the fifty-fourth aspect is constructed such that the first radially outer anodized layer is different from the first radially inner anodized layer. The second radially outer anodized layer is different from the second radially inner anodized layer.

With the bicycle rim according to the fifty-ninth aspect, it is possible to make a difference between the characteristics of the first braking surface and the second braking surface and the characteristics of the first non-braking surface and the second non-braking surface.

According to a sixtieth aspect of the present invention, the bicycle rim according to any one of the fifty-first to fifty-ninth aspects is constructed such that at least one first groove is formed on the first braking surface.

With the bicycle rim according to the sixtieth aspect, the bicycle rim can improve the braking performance of the first braking surface under wet conditions.

According to a sixty-first aspect of the present invention, the bicycle rim according to the sixtieth aspect is constructed such that at least one first groove is a single spiral groove.

With the bicycle rim according to the sixty-first aspect, the bicycle rim can further improve the braking performance of the first braking surface under wet conditions.

According to a sixty-second aspect of the present invention, the bicycle rim according to any one of the fifty-fourth, fifty-fifth, fifty-sixth, and fifty-eighth aspects is constructed such that at least one second groove is Formed on the second braking surface.

With the bicycle rim according to the sixty-second aspect, the bicycle rim can improve the braking performance of the second braking surface under wet conditions.

According to a sixty-third aspect of the present invention, the bicycle rim according to the sixty-second aspect is constructed such that at least one second groove is a single spiral groove.

With the bicycle rim according to the sixty-third aspect, the bicycle rim can further improve the braking performance of the second braking surface under wet conditions.

Selected embodiments of the present technology will be explained with reference to the drawings. It will be apparent to those skilled in the art from this disclosure that the following description of the embodiments of the technology is provided for illustration only and is not intended to limit the scope of the attached patent application and its equivalent This technology is for the purpose.

In this embodiment, the following directional terms "forward", "backward", "left", "right", "high", "low", "up" and "down", and any other similar directions Sexual terms refer to those determined based on the rider sitting on the bicycle's bicycle seat (not shown) and facing the bicycle handlebar (not shown). First embodiment

The bicycle wheel assembly 1 according to the first embodiment will be described below. As shown in FIG. 1, the bicycle wheel assembly 1 includes a hub 3, a plurality of spokes 5, and a bicycle rim 7. The hub 3 is disposed radially inward from the bicycle rim 7 with respect to the rotation center axis C1 of the bicycle wheel assembly 1. The hub 3 is mounted on a bicycle frame (not shown).

A plurality of spokes 5 are provided between the hub 3 and the bicycle rim 7 in a radial direction with respect to the rotation center axis C1. A radially inner end of the spoke 5 is attached to the hub 3, and a radially outer end of the spoke 5 is attached to a bicycle rim 7.

＜ Bicycle rims ＞

As shown in FIG. 1, the bicycle rim 7 is formed in a substantially annular shape. The tire 9 is attached to a bicycle rim 7. A plurality of spokes 5 are attached to the bicycle rim 7 as described above. The bicycle rim 7 has a rotation center axis. The rotation center axis of the bicycle rim 7 is coaxial with the rotation center axis C1 of the hub.

As shown in FIG. 2, the bicycle rim 7 includes a radially outer peripheral portion 11, a radially inner peripheral portion 13, a first side wall 15, and a first anodized layer 17. The bicycle rim 7 further includes a second side wall 19 and a second anodized layer 21.

The bicycle rim 7 may also include a third anodized layer 24. The bicycle rim 7 may further include a connection portion 23. The bicycle rim 7 is made of aluminum.

(Radial outer peripheral part)

As shown in FIG. 2, the radially outer peripheral portion 11 is positioned radially outward from the radially inner peripheral portion 13 with respect to the rotation center axis C1.

The radially outer peripheral portion 11 includes a first radially outer peripheral portion 11 a and a second radially outer peripheral portion 11 b. The first radially outer peripheral portion 11a is formed in a substantially annular shape. The first radially outer peripheral portion 11 a partially projects from the first side wall 15 toward the second radially outer peripheral portion 11 b in the axial direction with respect to the rotation center axis C1.

The second radially outer peripheral portion 11b is formed in a substantially annular shape. The second radially outer peripheral portion 11b partially projects from the second side wall 19 toward the first radially outer peripheral portion 11a in the axial direction with respect to the rotation center axis C1.

The first radially outer peripheral portion 11a and the second radially outer peripheral portion 11b are disposed at a distance from each other in the axial direction with respect to the rotation center axis C1. The tire 9 is mounted in the axial direction with respect to the rotation center axis C1 between the first radially outer peripheral portion 11 a and the second radially outer peripheral portion 11 b.

(Radial inner peripheral part)

As seen in FIG. 2, the radially inner peripheral portion 13 is positioned radially inward from the radially outer peripheral portion 11 with respect to the rotation center axis C1.

The radially inner peripheral portion 13 is provided between the first side wall 15 and the second side wall 19 in the axial direction with respect to the rotation center axis C1. In this embodiment, the radially inner peripheral portion 13 is formed integrally with the first and second radially outer peripheral portions 11 a and 11 b and the first and second side walls 15 and 19.

The radially inner peripheral portion 13 includes a plurality of first holes 13a. The plurality of first holes 13a are provided at a pitch in the circumferential direction with respect to the rotation center axis C1.

The first holes 13a are through holes that penetrate the radially inner peripheral portion 13 in the radial direction with respect to the rotation center axis C1.

A radially outer end of the spoke 5 is provided in the first hole 13a. The radially outer end of the spoke 5 is attached to the radially inner peripheral portion 13 by, for example, a nipple (not shown).

(First side wall)

The first side wall 15 is made of aluminum. As shown in FIG. 2, the first side wall 15 extends between the radially outer peripheral portion 11 and the radially inner peripheral portion 13. Specifically, the first side wall 15 extends between the first radially outer peripheral portion 11 a and the radially inner peripheral portion 13 in the radial direction with respect to the rotation center axis C1.

The first side wall 15 includes a first braking surface 15a, and a first non-braking surface 15b positioned radially inward from the first braking surface 15a with respect to the rotation center axis C1.

The first braking surface 15a is constructed to contact the brake pads of a bicycle during a braking operation. The first braking surface 15 a is an axially outside surface of the first side wall 15 and is configured to extend radially outward on the first side wall 15. The first braking surface 15a is preferably formed in a ring shape.

At least one first groove 15c is formed on the first braking surface 15a. For example, the at least one first groove 15c is preferably a single spiral groove. Alternatively, the at least one first groove 15c can include a plurality of grooves. For example, the at least one first groove 15c can include a plurality of annular grooves.

In this embodiment, the first groove 15c, which is a single spiral groove, extends in a spiral shape in the circumferential direction with respect to the rotation center axis C1. The first groove 15c facilitates drainage on the first braking surface 15a during a braking operation. Therefore, the braking performance under wet conditions is enhanced by space.

The first non-braking surface 15b is constructed to not contact a brake pad of a bicycle. The first non-braking surface 15 b is an axially outside surface of the first side wall 15 and is configured to extend radially inwardly on the first side wall 15. The first non-braking surface 15b is preferably formed in a ring shape.

The step difference is preferably formed between the first braking surface 15a and the first non-braking surface 15b. The step difference extends in the circumferential direction with respect to the rotation center axis C1. The order difference between the first braking surface 15a and the first non-braking surface 15b ranges from 0.8 mm to 1.2 mm. For example, the order difference between the first braking surface 15a and the first non-braking surface 15b is 1.0 mm.

Such a step difference may not be formed between the first braking surface 15a and the first non-braking surface 15b.

(First anodized layer)

As shown in FIG. 2, a first anodized layer 17 is provided on the first braking surface 15 a and the second non-braking surface 15 b. The first anodized layer 17 may be connected to the second anodized layer 21 via the radially inner peripheral portion 13. In other words, the first anodized layer 17 and the second anodized layer 21 are connected to each other via the radially inner peripheral portion 13.

Specifically, after cutting the first braking surface 15a and the first non-braking surface 15b of the first side wall 15, the first anodized layer 17 is formed on the first braking surface 15a and the first non-braking surface 15b. The anodizing of the first anodized layer 17 is described in detail below.

(Second side wall)

The second side wall 19 is made of aluminum. As shown in FIG. 2, the second side wall 19 is spaced from the first side wall 15 in the axial direction with respect to the rotation center axis C1.

The second side wall 19 extends between the radially outer peripheral portion 11 and the radially inner peripheral portion 13. Specifically, the second side wall 19 extends between the second radially outer peripheral portion 11 b and the radially inner peripheral portion 13 in the radial direction with respect to the rotation center axis C1.

The second side wall 19 includes a second braking surface 19a, and a second non-braking surface 19b positioned radially inward from the second braking surface 19a with respect to the rotation center axis C1.

The second braking surface 19a is constructed to contact the brake pads of the bicycle during a braking operation. The second braking surface 19 a is an axially outside surface of the second side wall 19 and is configured to extend radially outward on the second side wall 19. The second braking surface 19a is preferably formed in a ring shape.

At least one second groove 19c is formed on the second braking surface 19a. For example, the at least one second groove 19c is preferably a single spiral groove. Alternatively, the at least one first groove 15c can include a plurality of grooves. For example, the at least one second groove 19c can include a plurality of annular grooves.

In this embodiment, the second groove 19c, which is a single spiral groove, extends in a spiral shape in the circumferential direction with respect to the rotation center axis C1. The second groove 19c facilitates drainage on the second braking surface 19a during a braking operation. Therefore, the braking performance under wet conditions is enhanced by space.

The second non-braking surface 19b is constructed so as not to contact the brake pads of the bicycle. The second non-braking surface 19 b is an axially outside surface of the second side wall 19 and is configured to extend radially inwardly on the second side wall 19. The second non-braking surface 19b is preferably formed in a ring shape.

The step difference is preferably formed between the second braking surface 19a and the second non-braking surface 19b. The step difference extends in the circumferential direction with respect to the rotation center axis C1. The order difference between the second braking surface 19a and the second non-braking surface 19b ranges from 0.8 mm to 1.2 mm. For example, the difference in rank between the second braking surface 19a and the second non-braking surface 19b is 1.0 mm. Such a step difference may not be formed between the second braking surface 19a and the second non-braking surface 19b.

(Second Anodized Layer)

As shown in FIG. 2, a second anodized layer 21 is provided on the second braking surface 19 a and the second non-braking surface 19 b. The second anodized layer 21 may be connected to the first anodized layer 17 via the radially inner peripheral portion 13. Specifically, the second anodized layer 21 may be connected to the first anodized layer 17 via the third anodized layer 24.

For example, after cutting the second braking surface 19a and the second non-braking surface 19b of the second side wall 19, the second anodized layer 21 is formed on the second braking surface 19a and the second non-braking surface 19b. The anodizing of the second anodized layer 21 is described in detail below.

(Third Anodized Layer)

As shown in FIG. 2, a third anodized layer 24 may be provided on the radially inner peripheral portion 13. The third anodized layer 24 is formed on the radially inner peripheral portion 13.

The third anodized layer 24 may be connected to the first anodized layer 17 and the second anodized layer 21. For example, after the outer surface of the third anodized layer 24 is cut, the third anodized layer 24 can be formed integrally with the first anodized layer 17 and the second anodized layer 21. The anodizing of the third anodized layer 24 is described in detail below.

(Connection part)

The connecting portion 23 is constructed to connect the first side wall 15 and the second side wall 19. The connection portion 23 is preferably formed in a ring shape. The connecting portion 23 is provided between the first side wall 15 and the second side wall 19 in the axial direction with respect to the rotation center axis C1. In this embodiment, the connecting portion 23 is formed integrally with the first side wall 15 and the second side wall 19.

The connection portion 23 includes a plurality of second holes 23a. The plurality of second holes 23a are provided at a pitch in the circumferential direction with respect to the rotation center axis C1.

The second hole 23a is provided in a radial direction with respect to the rotation center axis C1 so as to face the first hole 13a. The second hole 23a is a through hole penetrating the connection portion 23 in the radial direction with respect to the rotation center axis C1.

A tool (not shown) is inserted into the second hole 23 a with respect to the rotation center axis C1 from the radially outer portion of the connecting portion 23 toward the radially inner portion of the connecting portion 23. In this state, the radially outer end of the spoke 5 is attached to the first hole 13 a of the radially inner peripheral portion 13 by a tool via a pipe (not shown).

<Handling of bicycle rims>

As shown in FIG. 3, anodizing is performed on the bicycle rim 7 as described below. First, a cutting process is performed on the first braking surface 15a and the second braking surface 19a to form at least one first groove 15C and at least one second groove on the first braking surface 15a and the second braking surface 19a, respectively. 19c (S11). In the cutting process, a first groove 15c and a second groove 19c (preferably a single spiral groove) are formed on the first braking surface 15a and the second braking surface 19a, respectively.

Next, degreasing is performed on the bicycle rim 7 (S12). For example, the degreasing treatment is performed on at least the first side wall 15 (eg, the first braking surface 15a and the first non-braking surface 15b) and the second side wall 19 (eg, the second braking surface 19a and the second non-braking surface 19b). Execute.

Specifically, in the degreasing process, the bicycle rim 7 is immersed in a phosphoric acid solution at 60 degrees Celsius for 10 minutes. Thereby, the outer surface of the bicycle rim 7 is degreased.

Accordingly, for example, the degreasing treatment is performed on the outer surfaces of the radially outer peripheral portion 11, the radially inner peripheral portion 13, the first side wall 15, the second side wall 19, and the connection portion 23.

After the surface roughening treatment is performed on the first side wall 15 and the second side wall 19 (for example, the first braking surface 15a and the second braking surface 19a) by a device such as a sand blasting device or a laser processing device, Oil treatment can be performed.

Then, the anodizing treatment is performed on the bicycle rim 7 (S13). For example, the anodizing process is performed on at least the first side wall 15 (for example, the first braking surface 15a and the first non-braking surface 15b) and the second side wall 19 (for example, the second braking surface 19a and the second non-braking surface 19b). Execute. (N) in S13 of FIG. 3 is a symbol showing an alumite layer having a natural color appearance.

Specifically, in the anodizing process, under conditions of a temperature of 0 to 20 degrees Celsius, a current density of 1 to 20 A / dm2, and an electrolysis time of more than 30 minutes, the bicycle rim 7 is immersed in a range of 0.1% to 5.0 % Sulfuric acid and 5% ~ 20% organic acid solution.

Thereby, for example, the anodizing treatment is performed on the outer surfaces of the radially outer peripheral portion 11, the radially inner peripheral portion 13, the first side wall 15, the second side wall 19, and the connection portion 23.

Finally, the drying process is performed on the bicycle rim 7 (S14). Specifically, in the drying process, the bicycle rim 7 is accommodated in a drying oven at 100 degrees Celsius for 30 minutes.

With the above processing, the first anodized layer 17 and the second anodized layer 21 (for example, an acid-resistant aluminum layer having a natural color appearance) are formed on the first side wall 15 and the second side wall.

In this embodiment, a third anodized layer 24 (for example, an acid-resistant aluminum layer having a natural color appearance) can be formed on the radially inner peripheral portion 13. An acid-resistant aluminum layer having a natural color appearance can be formed on the radially outer peripheral portion 11 and the connection portion 23.

<Characteristics of bicycle rims>

The first anodized layer 17 formed by the above processes includes the following characteristics.

The first anodized layer 17 on the first braking surface 15a has a first roughness Ra equal to or greater than 10 micrometers. Preferably, the first roughness Ra is equal to or greater than 15 microns. In this embodiment, for example, the first roughness Ra is 20 micrometers.

The second anodized layer 21 on the second braking surface 19a has a second roughness Ra equal to or greater than 10 micrometers. Preferably, the second roughness Ra is equal to or greater than 15 microns. In this embodiment, for example, the second roughness Ra is 20 micrometers.

In this embodiment, the first roughness Ra and the second roughness Ra are obtained using a ten-point average roughness as described below. The outer surface of each of the first anodized layer 17 and the second anodized layer 21 is approximated by using an approximate formula f (x) in a predetermined range L therein.

The first roughness Ra (N) and the second roughness Ra (N) are calculated using the formula Ra (N) = ∫ | f (x) | dx / L, 0 ≦ x ≦ L. The first roughness Ra (N) and the second roughness Ra (N) are calculated at ten points. The first roughness Ra and the second roughness Ra are calculated using the formula Ra = Ra (N) / N, N = 10. The first anodized layer 17 and the second anodized layer 21 may be samples randomly selected from the bicycle rim 7.

The first anodized layer 17 on the first non-braking surface 15b has a first glossiness Gs (60 degrees) equal to or greater than 5. Preferably, the first glossiness Gs (60 degrees) is equal to or greater than 20. In this embodiment, for example, the first glossiness Gs (60 degrees) is 28.

The second anodized layer 21 on the second non-braking surface 19b has a second glossiness Gs (60 degrees) equal to or greater than 5. Preferably, the second glossiness Gs (60 degrees) is equal to or greater than 20. In this embodiment, for example, the second glossiness Gs (60 degrees) is 28.

In this embodiment, the first glossiness Gs (60 degrees) and the second glossiness Gs (60 degrees) are defined by dividing the reflected luminous flux Fs by the critical measure measure Fos. For example, the first glossiness Gs (60 degrees) and the second glossiness Gs (60 degrees) are calculated using the formula Gs (60 degrees) = (Fs / Fos) * 100.

The effective scalar number Fos corresponds to the specularly reflected light flux of a glass surface with a refractive index of 1.576. The reflected light flux Fs corresponds to the measured light flux.

For example, first, the luminous flux is incident light from the light source at 60 degrees to the outer surface of each of the first anodized layer 17 and the second anodized layer 21. Next, a reflected light flux Fs reflected at 60 degrees from the outer surface of each of the first anodized layer 17 and the second anodized layer 21 is measured by a light receiver.

The luminous flux measured by the light receiver is the luminous flux measured above. The first anodized layer 17 and the second anodized layer 21 may be samples randomly selected from the bicycle rim 7.

The third anodized layer 24 can have the same characteristics as the first and second roughness Ra and the first and second glossiness Gs (60 degrees).

<Modification of First Embodiment>

<VA1> As a modification of the first embodiment, for example, the anodizing treatment (S13a) can be performed between the degreasing treatment (S12) and the drying treatment (S14) as described below.

As shown in FIG. 4A, in the anodizing treatment (S13a), the bicycle rim 7 is immersed under conditions of a temperature of 10 degrees Celsius or lower, a current density of 5 to 20 A / dm2, and an electrolysis time of 30 minutes or more In a solution containing 5.0% ~ 20% sulfuric acid.

With the above processing, the first anodized layer 17 and the second anodized layer 21 (for example, a hard aluminum oxide layer) can be formed on the first side wall 15 and the second side wall 19.

A third anodized layer 24 (for example, a hard acid-resistant aluminum layer) can be formed on the radially inner peripheral portion 13. (H) in S13a of FIG. 4A is a symbol which shows a hard acid-resistant aluminum layer.

<VA2> As a modification of the first embodiment, for example, the following anodizing treatment (S13b) and electrolytic coloring treatment (S13c) can be performed between the degreasing treatment (S12) and the drying treatment (S14).

In this case, as shown in FIG. 4B, in the anodizing process (S13b), under the conditions of a temperature of 20 to 30 degrees Celsius, a current density of 1 to 5 A / dm2, and an electrolysis time of 30 minutes or more, The bicycle rim 7 is immersed in a solution containing 5.0% -20% sulfuric acid.

In the electrolytic coloring process (S13c), the bicycle rim 7 is immersed in a range of 15 to 35 under the conditions of an alternating current electrolysis of 10 volts or more, a processing time of 2 to 15 minutes or more, and a bath temperature of 10 to 30 degrees Celsius g / l of nickel sulfate, 20-40 g / l of boric acid, and 10-20 g / l of ammonium sulfate.

With the above processing, the first anodized layer 17 and the second anodized layer 21 (for example, an acid-resistant aluminum layer having a black appearance) can be formed on the first side wall 15 and the second side wall 19.

A third anodized layer 24 (for example, an acid-resistant aluminum layer having a black appearance) can be formed on the radially inner peripheral portion 13. Second embodiment

As shown in FIG. 1, the bicycle wheel assembly 101 according to the first embodiment will be described below. The bicycle wheel assembly 101 includes a hub 3, a plurality of spokes 5, and a bicycle rim 107.

The bicycle wheel assembly 101 has a structure substantially the same as that of the bicycle wheel assembly 1 except for the bicycle rim 107. Therefore, the same component symbols as those of the bicycle wheel assembly 1 will be assigned to components having substantially the same functions as those in the first embodiment. The description of the components will be omitted here. In addition, the description of the first embodiment is applied to the description of the elements.

＜ Bicycle rims ＞

As shown in FIG. 1, the bicycle rim 107 is formed in a substantially annular shape. The tire 9 is attached to a bicycle rim 107. A plurality of spokes 5 are attached to the bicycle rim 107. The bicycle rim 107 has a rotation center axis C1.

As shown in FIG. 5, the bicycle rim 107 includes a radially outer peripheral portion 11, a radially inner peripheral portion 13, a first side wall 15, a first radially outer anodized layer 27, and a first radially inner anodized layer. 29.

The bicycle rim 107 further includes a second side wall 19, a second radially outer anodized layer 31, and a second radially inner anodized layer 33. The bicycle rim 107 may also include a third anodized layer 24. The bicycle rim 107 further includes a connection portion 23. The bicycle rim 107 is made of aluminum.

The configuration of the radially outer peripheral portion 11, the radially inner peripheral portion 13, the first side wall 15, the second side wall 19, the connection portion 23, and the third anodized layer 24 in the second embodiment is the same as that of the first embodiment. These elements have the same structure. The description of this configuration will be omitted here.

(First radial outer anodized layer)

As shown in FIG. 5, a first radially outer anodized layer 27 is provided on the first braking surface 15a. A first radially outer anodized layer 27 is formed on the first braking surface 15a.

The first radially outer anodized layer 27 is provided in the radial direction with respect to the rotation center axis C1 between the radially outer peripheral portion 11 and the first non-braking surface 15b. For example, the first radially outer anodized layer 27 is provided between the first radially outer peripheral portion 11a and the first radially inner anodized layer 29 in the radial direction with respect to the rotation center axis C1.

The first radially outer anodized layer 27 can be connected to the first radially inner anodized layer 29. The first radially outer anodized layer 27 may not be connected to the first radially inner anodized layer 29. The anodizing of the first radially outer anodized layer 27 is described in detail below.

(First radial inner anodized layer)

As shown in FIG. 5, a first radially inner anodized layer 29 is provided on the first non-braking surface 15b. A first radially inner anodized layer 29 is formed on the first non-braking surface 15b.

The first radially inner anodized layer 29 is provided in a radial direction with respect to the rotation center axis C1 between the first braking surface 15 a and the radially inner peripheral portion 13. For example, the first radially inner anodized layer 29 is provided in the radial direction with respect to the rotation center axis C1 between the first radially outer anodized layer 27 and the radially inner peripheral portion 13.

The first radially inner anodized layer 29 can be connected to the first radially outer anodized layer 27. The first radially inner anodized layer 29 may not be connected to the first radially outer anodized layer 27.

The first radially inner anodized layer 29 can be connected to the second radially inner anodized layer 33 via the radially inner peripheral portion 13. Specifically, the first radially inner anodized layer 29 can be connected to the second radially inner anodized layer 33 via the third anodized layer 24. The anodizing of the first radially inner anodized layer 29 is described in detail below.

(Second radial outer anodized layer)

As shown in FIG. 5, a second radially outer anodized layer 31 is provided on the second braking surface 19a. A second radially outer anodized layer 31 is formed on the second braking surface 19a.

The second radially outer anodized layer 31 is provided in the radial direction with respect to the rotation center axis C1 between the radially outer peripheral portion 11 and the second non-braking surface 19b. For example, the second radially outer anodized layer 31 is provided between the radially outer peripheral portion 11 and the second radially inner anodized layer 33 in the radial direction with respect to the rotation center axis C1.

The second radially outer anodized layer 31 can be connected to the second radially inner anodized layer 33. The second radially outer anodized layer 31 may not be connected to the second radially inner anodized layer 33. Anodizing of the second radially outer anodized layer 31 is described in detail below.

(Second radial inner anodized layer)

As shown in FIG. 5, a second radially inner anodized layer 33 is provided on the second non-braking surface 19b. A second radially inner anodized layer 33 is formed on the second non-braking surface 19b.

The second radially inner anodized layer 33 is provided in the radial direction with respect to the rotation center axis C1 between the second braking surface 19 a and the radially inner peripheral portion 13. For example, the second radially inner anodized layer 33 is provided in the radial direction with respect to the rotation center axis C1 between the second radially outer anodized layer 31 and the radially inner peripheral portion 13.

The second radially inner anodized layer 33 can be connected to the second radially outer anodized layer 31. The second radially inner anodized layer 33 may not be connected to the second radially outer anodized layer 31.

The second radially inner anodized layer 33 can be connected to the first radially inner anodized layer 29 via the radially inner peripheral portion 13. Specifically, the second radially inner anodized layer 33 can be connected to the first radially inner anodized layer 29 via the third anodized layer 24. The anodizing of the second radially inner anodized layer 33 is described in detail below.

<Handling of bicycle rims>

As shown in FIG. 6, anodizing is performed on the bicycle rim 107 as described below. First, the degreasing process is performed on the bicycle rim 107 (S21). For example, the degreasing treatment is performed on at least the first side wall 15 (eg, the first braking surface 15a and the first non-braking surface 15b) and the second side wall 19 (eg, the second braking surface 19a and the second non-braking surface 19b). Execute.

Specifically, in the degreasing process, the bicycle rim 107 is immersed in a phosphoric acid solution at 60 degrees Celsius for 10 minutes. Accordingly, for example, the degreasing treatment is performed on the outer surfaces of the radially outer peripheral portion 11, the radially inner peripheral portion 13, the first side wall 15, the second side wall 19, and the connection portion 23.

Next, an anodizing process is performed on the bicycle rim 107 (S22). For example, the anodizing process is performed on at least the first side wall 15 (for example, the first braking surface 15a and the first non-braking surface 15b) and the second side wall 19 (for example, the second braking surface 19a and the second non-braking surface 19b). Execute.

Specifically, in the anodizing process, the bicycle rim 107 was immersed in a solution containing 15% sulfuric acid under the conditions of a temperature of 20 to 25 degrees Celsius, a current density of 1.5 A / dm2, and an electrolysis time of 30 minutes. .

Thereby, the acid-resistant aluminum layer (A1) is formed on the outer surfaces of the radially outer peripheral portion 11, the radially inner peripheral portion 13, the first side wall 15, the second side wall 19, and the connection portion 23.

Then, the sealing process and the dyeing process are performed on the bicycle rim 107 (S23). For example, the sealing treatment and the dyeing treatment are performed on at least the acid-resistant aluminum layer (A1).

Specifically, in the sealing process and the dyeing process, the bicycle rim 107 is immersed in a solution including a black water-soluble organic dye and nickel acetate. Thereby, the acid-resistant aluminum layer is closed by nickel acetate and is dyed black, for example.

Thereby, the sealing treatment and the dyeing treatment are performed on the outer surfaces of the radially outer peripheral portion 11, the radially inner peripheral portion 13, the first side wall 15, the second side wall 19, and the connection portion 23.

Then, a cutting process is performed on the acid-resistant aluminum layer on the first braking surface 15a and the second braking surface 19a (S24) to form at least one first groove on the first braking surface 15a and the second braking surface 19a, respectively. 15C and at least one second groove 19c. Thereby, the acid-resistant aluminum layer (A1) on the first braking surface 15a and the second braking surface 19a is removed. In the cutting process, a single spiral groove can be formed on the first braking surface 15a and the second braking surface 19a. Further, the surface roughening treatment can be performed on the first braking surface 15a and the second braking surface 19a by a device such as a sand blasting device or a laser processing device.

Then, the anodizing treatment is performed on the bicycle rim 107 (S25). For example, the anodizing treatment is performed on the first braking surface 15a and the second braking surface 19a.

Specifically, in the anodizing process, under conditions of a temperature of 0 to 20 degrees Celsius, a current density of 2.5 A / dm2, and an electrolysis time of 30 minutes or more, the bicycle rim 107 is immersed in a sulfuric acid solution containing 0.1% or more 3% organic acid solution.

Thereby, the first radially outer anodized layer 27, the second radially outer anodized layer 31, and the third anodized layer 24 (for example, an acid-resistant aluminum layer (A2) having a natural color appearance) are formed on the first brake. The surface 15a, the second brake surface 19a, and the radially inner peripheral portion 13 are on the surface.

Finally, the drying process is performed on the bicycle rim 107 (S26). Specifically, in the drying process, the bicycle rim 107 is accommodated in a drying oven at 100 degrees Celsius for 30 minutes.

With the above processing, for example, the first radially outer anodized layer 27 and the second radially outer anodized layer 31 include an acid-resistant aluminum layer (A2) having a natural color appearance. The first radially inner anodized layer 29, the second radially inner anodized layer 33, and the third anodized layer 24 include an acid-resistant aluminum layer (A1) having a black appearance.

In this embodiment, the third anodized layer 24 can include an acid-resistant aluminum layer having a black appearance. The acid-resistant aluminum layer can be formed on the radially outer peripheral portion 11 and the connection portion 23.

<Characteristics of bicycle rims>

(First side wall)

The first radially outer anodized layer 27 is different from the first radially inner anodized layer 29. For example, the first radially outer anodized layer 27 can be different from the first radially inner anodized layer 29 in terms of layer thickness, thermal emissivity, hardness, and brightness (L *).

The first radially outer oxide layer 27 has a first layer thickness. For example, the thickness of the first layer is 30 μm or more and 100 μm or less. In this embodiment, for example, the thickness of the first layer is 35 micrometers.

The thickness of the first layer was measured as described below. A sample of the first side wall 15 is cut from the bicycle rim 107. After the sample is embedded in the resin, the cutting plane of the sample is ground.

In this state, the cutting plane of the sample is observed with a microscope. Here, the thickness of the first layer is measured.

The first radially outer anodized layer 27 has a first thermal emissivity. For example, the first thermal emissivity is less than 81%. In this embodiment, for example, the first thermal emissivity is 80.6%.

The first thermal emissivity is defined as the ratio of the light energy of the first radially outer anodized layer 27 to the light energy of the black body. The light energy of the first radially outer anodized layer 27 is the one released by the first radially outer anodized layer 27 in thermal radiation. The light energy of the black body is released by the black body at the same temperature as the temperature of the first radially outer anodized layer 27.

The first thermal emissivity is measured based on JIS R 1693-2 as described below. The spectrum of the first radially outer anodized layer 27 is measured by FTIR (Fourier transform infrared spectrometer). The first thermal emissivity is calculated based on the spectrum at a predetermined temperature (for example, 20, 30, 50, and 70 degrees Celsius).

The first radially outer anodized layer 27 has a first hardness. For example, the first hardness is 300 Hv or more and 600 Hv or less. In this embodiment, for example, the first hardness is 500 Hv.

The first hardness was measured as described below. The first hardness is defined by the Vickers hardness HV. The Vickers hardness HV is determined by the F / A ratio, where F is the force (unit: gram force) applied to the pressure body, and A is the surface area of the first radially outer anodized layer 27 (unit: cm2 ). In other words, the Vickers hardness HV is calculated using the formula HV = 1.8544 * F / (d * d) or HV = 0.1891 * F / (d * d).

The first radially outer oxide layer 27 has a first brightness (L *). For example, the first brightness (L *) is 26.5 or more and 35 or less. In this embodiment, for example, the first brightness is 27.3. In addition, brightness (L *) is one of three elements of color. These three elements include brightness (L *), saturation, and hue.

The first brightness (L *) is one of the color attributes. The first brightness (L *) indicates the degree of lightness and darkness.

The first brightness (L *) was measured as described below. The light is incident light from the light source at 45 degrees to the outer surface of the first radially outer anodized layer 27. The reflected light reflected from the first radially outer anodized layer 27 at 0 ± 5 degrees is measured by the light receiver. The first brightness (L *) is measured based on the light measured by the light receiver.

The first radially inner anodized layer 29 is different from the first radially outer anodized layer 27. For example, the first radially inner anodized layer 29 can be different from the first radially outer anodized layer 27 in terms of layer thickness, thermal emissivity, hardness, and brightness (L *).

The first radially inner anodized layer 29 has a second layer thickness that is less than the thickness of the first layer. For example, the thickness of the second layer is 2.5 μm or more and 10 μm or less. In this embodiment, for example, the thickness of the second layer is 10 micrometers.

The first radially inner anodized layer 29 has a second thermal emissivity that is greater than the first thermal emissivity. For example, the second thermal emissivity is equal to or greater than 81%. In this embodiment, for example, the second thermal emissivity is 82%.

The first radially inner anodized layer 29 has a second hardness that is less than the first hardness. For example, the second hardness is 150 Hv or more and 250 Hv or less. In this embodiment, for example, the second hardness is 200 Hv.

The first radially inner anodized layer 29 has a second brightness (L *) that is less than the first brightness (L *). For example, the second brightness (L *) is equal to or greater than 20 and equal to or less than 26. In this embodiment, for example, the second brightness (L *) is 25.5.

The measurement of the second layer thickness, the second thermal emissivity, the second hardness and the second brightness (L *) of the first radially inner anodized layer 29 is the same as that of the first radially outer anodized layer 27. By this, descriptions of those will be omitted here.

The measurement form of the second layer thickness, the second thermal emissivity, the second hardness, and the second brightness (L *) of the first radially inner anodized layer 29 is the same as that of the first radially outer anodized layer 27 . By this, descriptions of those will be omitted here.

The objects used to measure the first and second thermal emissivity, the first and second hardness, and the first and second brightness (L *) may be samples randomly selected from the bicycle rim 107.

(Second side wall)

The second radially outer anodized layer 31 is different from the second radially inner anodized layer 33. For example, the second radially outer anodized layer 31 can be different from the second radially inner anodized layer 33 in terms of layer thickness, thermal emissivity, hardness, and brightness (L *).

The second radially outer oxide layer 31 has a third layer thickness. For example, the third layer has a thickness of 30 μm or more and 100 μm or less. In this embodiment, for example, the thickness of the third layer is 35 micrometers.

The second radially outer anodized layer 31 has a third thermal emissivity. For example, the third thermal emissivity is less than 81%. In this embodiment, for example, the third thermal emissivity is 80.6%.

The second radially outer anodized layer 31 has a third hardness. For example, the third hardness is 300 Hv or more and 600 Hv or less. In this embodiment, for example, the third hardness is 500 Hv.

The second radially outer anodized layer 31 has a third brightness (L *). For example, the third brightness (L *) is 26.5 or more and 35 or less. In this embodiment, for example, the third brightness (L *) is 27.3.

The measurement forms of the third thickness, the third thermal emissivity, the third hardness, and the third brightness (L *) of the second radially outer anodized layer 31 are the same as those of the first radially outer anodized layer 27. By this, descriptions of those will be omitted here.

The second radially inner anodized layer 33 is different from the second radially outer anodized layer 31. For example, the second radially inner anodized layer 33 can be different from the second radially outer anodized layer 31 in terms of layer thickness, thermal emissivity, hardness, and brightness (L *).

The second radially inner oxide layer 33 has a fourth layer thickness smaller than the third layer thickness. For example, the thickness of the fourth layer is 2.5 μm or more and 10 μm or less. In this embodiment, for example, the thickness of the fourth layer is 10 micrometers.

The second radially inner anodized layer 33 has a fourth thermal emissivity that is greater than the third thermal emissivity. For example, the fourth thermal emissivity is equal to or greater than 81%. In this embodiment, for example, the fourth thermal emissivity is 82%.

The second radially inner anodized layer 33 has a fourth hardness that is less than the third hardness. For example, the fourth hardness is 150 Hv or more and 250 Hv or less. In this embodiment, for example, the fourth hardness is 200 Hv.

The second radially inner anodized layer 33 has a fourth brightness (L *) that is less than a third brightness (L *). For example, the fourth brightness (L *) is 20 or more and 26 or less. In this embodiment, for example, the fourth brightness (L *) is 25.5.

The measurement form of the fourth layer thickness, the fourth thermal emissivity, the fourth hardness, and the fourth brightness (L *) of the second radially inner anodized layer 31 is the same as that of the first radially outer anodized layer 27 . By this, descriptions of those will be omitted here.

The third anodized layer 24 can have the same characteristics as the first radially inner anodized layer 29 and the second radially inner anodized layer 33. Specifically, the third anodized layer 24 can have at least one of the second and fourth layer thicknesses, the second and fourth thermal emissivities, the second and fourth hardnesses, and the second and fourth brightness (L *) One characteristic has the same characteristics.

The objects used to measure the third and fourth thermal emissivity, the third and fourth hardness, and the third and fourth brightness (L *) may be samples randomly selected from the bicycle rim 107.

<Modification of Second Embodiment>

<VB1> As a modification of the second embodiment, the processing of the bicycle rim 107 is performed as described below. The description of the same configuration as the second embodiment will be omitted here.

As shown in FIG. 7A, first, a degreasing process is performed on the bicycle rim 107 (S21). Next, an anodizing process is performed on the bicycle rim 107 (S22). Thereby, the acid-resistant aluminum layer (A3) is formed at least on the first side wall 15 (for example, the first braking surface 15a and the first non-braking surface 15b) and the second side wall 19 (for example, the second braking surface 19a and the second non- braking surface Braking surface 19b).

Then, the dyeing process is performed on the bicycle rim 107 (S23a). Thereby, the acid-resistant aluminum layer (A3) is dyed black, for example.

Then, an electrodeposition coating process is performed on the bicycle rim 107 (S24a). For example, the anion electrodeposition coating process is performed on at least the first sidewall 15 (eg, the first braking surface 15a and the first non-braking surface 15b) and the second sidewall 19 (eg, the second braking surface 19a and the second non-braking surface 19b). ).

Specifically, in the anionic electrodeposition coating process, the bicycle rim 107 is immersed in In solution. Thereby, the coating layer (C) is formed on the acid-resistant aluminum layer.

Then, a drying process is performed on the bicycle rim 107 (S25a). Then, a cutting process is performed on the first braking surface 15a and the second braking surface 19a to form at least one first groove 15C and at least one second groove on the first braking surface 15a and the second braking surface 19a, respectively. 19c (S26a). Thereby, the acid-resistant aluminum layer (A3) and the coating layer (C) are removed from the first braking surface 15a and the second braking surface 19a.

Then, anodizing treatment like the anodizing treatment (S25) of the second embodiment is performed on the bicycle rim 107 (S27a). For example, the anodizing treatment is performed on the first braking surface 15a and the second braking surface 19a. Thereby, an acid-resistant aluminum layer (A2) having a natural color appearance is formed on the first braking surface 15a and the second braking surface 19a. Finally, the drying process is performed on the bicycle rim 107 (S28a).

With the above processing, for example, the first radially outer anodized layer 27 and the second radially outer anodized layer 31 include an acid-resistant aluminum layer (A2) having a natural color appearance. The first radially inner anodized layer 29 and the second radially inner anodized layer 33 include a coating layer (C) and an acid-resistant aluminum layer (A3) having a black appearance.

In this embodiment, the third anodized layer 24 can include a coating layer (C) and an acid-resistant aluminum layer (A3) having a black appearance. The coating layer (C) and the acid-resistant aluminum layer (A3) can be formed on at least one of the radially outer peripheral portion 11, the radially inner peripheral portion 13, and the connection portion 23.

<VB2> As a modification of VB1, for example, the following processing can be performed after the cutting processing (S26a). In this case, the following anodizing treatment is performed on the bicycle rim 107 after the cutting treatment (S26a) (S27b).

For example, as shown in FIG. 7B, in the anodizing process (S27b), under conditions of a temperature of 10 degrees Celsius or lower, a current density of 5 to 20 A / dm2, and an electrolysis time of 30 minutes or longer, the bicycle rim 107 It is immersed in a solution containing 5.0% -20% sulfuric acid. Thereby, a hard acid-resistant aluminum layer (A4) is formed on the outer surfaces of the first braking surface 15a and the second braking surface 19a.

With the above processing, for example, the first radially outer anodized layer 27 and the second radially outer anodized layer 31 include a hard acid-resistant aluminum layer (A4). The first radially inner anodized layer 29 and the second radially inner anodized layer 33 include a coating layer (C) and an acid-resistant aluminum layer (A3) having a black appearance.

In this embodiment, the third anodized layer 24 can include a coating layer (C) and an acid-resistant aluminum layer (A3) having a black appearance. The coating layer (C) and the acid-resistant aluminum layer (A3) can be formed on at least one of the radially outer peripheral portion 11, the radially inner peripheral portion 13, and the connection portion 23.

<VB3> As a modification of VB1, for example, the following processing can be performed after the cutting processing (S26a). In this case, the following anodizing treatment is performed on the bicycle rim 107 after the cutting treatment (S26a) (S27c).

For example, as shown in FIG. 7C, in the anodizing process (S27c), under conditions of a temperature of 20 to 25 degrees Celsius, a current density of 1 to 5 A / dm2, and an electrolysis time of 30 minutes or more, 107 was immersed in a solution containing 5.0% -20% sulfuric acid. Thereby, an acid-resistant aluminum layer (A5) is formed on the outer surfaces of the first braking surface 15a and the second braking surface 19a.

Then, the electrolytic coloring process is performed on the bicycle rim 107 (S28c). For example, in the electrolytic coloring process, the bicycle rim 107 is immersed in a range of 15 to 35 g / min under the conditions of 10 volts or more of alternating current electrolysis, a processing time of 2 to 15 minutes or more, and a bath temperature of 10 to 30 degrees Celsius l of nickel sulfate, 20 ~ 40 g / l of boric acid, and 10 ~ 20 g / l of ammonium sulfate. Finally, the drying process is performed on the bicycle rim 107 (S29).

With the above processing, for example, the first radially outer anodized layer 27 and the second radially outer anodized layer 31 include an acid-resistant aluminum layer (A5) having a black appearance. The first radially inner anodized layer 29 and the second radially inner anodized layer 33 include a coating layer (C) and an acid-resistant aluminum layer (A3) having a black appearance.

In this embodiment, the third anodized layer 24 can include a coating layer (C) and an acid-resistant aluminum layer (A3) having a black appearance. The coating layer (C) and the acid-resistant aluminum layer (A1) can be formed on at least one of the radially outer peripheral portion 11, the radially inner peripheral portion 13, and the connection portion 23. Although the bicycle rim is a clincher type in the above embodiments, the present invention can also be applied to a tube rim, a tubeless type, or a tube-lip type bicycle rim. General Explanation of Terms

In understanding the scope of this disclosure, the term "comprising" and its derivatives are used herein as open-ended terms that define the existence of stated features, elements, components, groups, integers, and / or steps , But does not exclude the existence of other features, components, components, groups, integers, and / or steps that are not mentioned.

The foregoing also applies to words with similar meanings, such as the terms "including", "having" and their derivatives. The terms “part”, “section”, “section”, “member”, or “element” can have the dual meaning of a single part or a plurality of parts when used in the singular type.

The following directional terms "forward", "backward", "above", "down", "vertical", "horizontal", "below" and "cross", and any other similar directions are used herein Sexual terms refer to those directions of bicycle rims. Therefore, the terms used to describe the technology should be interpreted relative to the bicycle rim.

The term "constructed" as used herein to describe a component, section or part of a device mirrors the existence of other undeclared or unmentioned components, sections or parts of the device to perform the desired function. The terms "substantially", "approximately" and "approximately" as used herein mean a reasonable amount of variation of the modified term so that the final result does not change significantly.

Although only selected embodiments have been chosen to illustrate the technology, it will be apparent to those skilled in the art from this disclosure that without departing from the scope of the technology as defined in the accompanying patent application Under the circumstances, various changes and modifications can be made here. For example, the size, shape, location, or orientation of the various components can be changed as needed and / or desired.

Components that are shown directly connected or in contact with each other can have intermediate structures disposed between them. The function of one element can be performed by two elements and vice versa. The structure and functions of one embodiment can be adopted in another embodiment. All advantages are not necessarily present in a particular embodiment at the same time.

Each feature that is different from the conventional technology, whether alone or in combination with other features, should also be considered as a separate description of the applicant's further technology, including the structural and / or functional concepts embodied by such features.

Therefore, the above description of the embodiments according to the present technology is only for illustration purposes, and not for the purpose of limiting the present technology as defined by the scope of the accompanying patent applications and their equivalents.

1‧‧‧ bicycle wheel assembly

3‧‧‧ Wheel

5‧‧‧ banner

7‧‧‧ bicycle rim

9‧‧‧ tire

11‧‧‧ Radial outer periphery

11a‧‧‧ the first radial outer peripheral portion

11b‧‧‧Second radial outer periphery

13‧‧‧ radially inner peripheral

13a‧‧‧First hole

15‧‧‧ the first side wall

15a‧‧‧First braking surface

15b‧‧‧First non-braking surface

15c‧‧‧The first groove

17‧‧‧ first anodized layer

19‧‧‧Second sidewall

19a‧‧‧Second braking surface

19b‧‧‧Second non-braking surface

19c‧‧‧Second groove

21‧‧‧second anodized layer

23‧‧‧Connecting Department

23a‧‧‧Second hole

24‧‧‧ third anodized layer

27‧‧‧ the first radial outer anodized layer

29‧‧‧ the first radial inner anodized layer

31‧‧‧Second radial outer anodized layer

33‧‧‧Second radial inner anodized layer

101‧‧‧ Bicycle wheel assembly

107‧‧‧ bicycle rim

A1‧‧‧acid-resistant aluminum layer

A2‧‧‧acid-resistant aluminum layer

A3‧‧‧acid-resistant aluminum layer

A4‧‧‧hard acid-resistant aluminum layer

A5‧‧‧Acid-resistant aluminum layer

C‧‧‧Coated layer

C1‧‧‧rotation center axis

S11‧‧‧Cutting treatment

S12‧‧‧ Degreasing

S13‧‧‧Anodizing

S13a‧‧‧Anodizing

S13b‧‧‧Anodizing treatment

S13c‧‧‧electrolytic coloring

S14‧‧‧Drying

S21‧‧‧ Degreasing

S22‧‧‧Anodizing

S23‧‧‧ closed treatment and dyeing treatment

S23a‧‧‧Dyeing treatment

S24‧‧‧Cutting treatment

S24a‧‧‧electrodeposition coating treatment

S25‧‧‧Anodizing

S25a‧‧‧Drying

S26‧‧‧Drying

S26a‧‧‧Cutting treatment

S27a‧‧‧Anodizing

S27b‧‧‧Anodizing treatment

S27c‧‧‧Anodizing

S28a‧‧‧Drying

S28c‧‧‧electrolytic coloring

S29‧‧‧Drying

Reference will now be made to the accompanying drawings that form part of this original disclosure:

1 is a side view of a bicycle wheel assembly according to a first embodiment of the present invention;

2 is a partially enlarged sectional view of a bicycle wheel assembly according to a first embodiment of the present invention;

3 is a schematic diagram for explaining processing of a bicycle rim;

4A is a schematic diagram for explaining processing of a bicycle rim as a modification of the first embodiment;

4B is a schematic diagram for explaining processing of a bicycle rim as a modification of the first embodiment;

5 is a partially enlarged sectional view of a bicycle wheel assembly according to a second embodiment of the present invention;

6 is a schematic diagram for explaining processing of a bicycle rim;

7A is a schematic diagram for explaining processing of a bicycle rim as a modification of the second embodiment;

7B is a schematic diagram for explaining processing of a bicycle rim as a modification of the second embodiment; and

FIG. 7C is a schematic diagram for explaining processing of a bicycle rim as a modification of the second embodiment.

Claims (63)

A bicycle rim having a rotation center axis, the bicycle rim comprising: a radially outer peripheral portion; a radially inner peripheral portion, which is positioned radially inward from the radially outer peripheral portion with respect to the rotation center axis; A first side wall made of aluminum, the first side wall extending between the radially outer peripheral portion and the radially inner peripheral portion, including a first braking surface, and a first braking surface relative to the rotation center axis from the first A first non-braking surface with a braking surface positioned radially inwardly; and a first anodized layer disposed on the first braking surface and the first non-braking surface; wherein the first braking surface The first anodized layer has a first roughness Ra equal to or greater than 10 microns; and wherein the first anodized layer on the first non-braking surface has a first glossiness Gs (60 degrees) equal to or greater than 5. The bicycle rim according to item 1 of the scope of patent application, further comprising: a second side wall made of aluminum and spaced from the first side wall in the axial direction with respect to the rotation center axis, the second side wall The side wall extends between the radially outer peripheral portion and the radially inner peripheral portion, and includes a second braking surface, and a second non-braking positioned radially inward from the second braking surface with respect to the rotation center axis. A surface; and a second anodized layer disposed on the second braking surface and the second non-braking surface; wherein the second anodizing layer on the second braking surface has a second equal to or greater than 10 microns The roughness Ra; and wherein the second anodized layer on the second non-braking surface has a second glossiness Gs (60 degrees) equal to or greater than 5. The bicycle rim according to item 1 or 2 of the scope of patent application, wherein the first roughness Ra is equal to or greater than 15 microns. The bicycle rim according to item 1 or 2 of the patent application scope, wherein the first glossiness Gs (60 degrees) is equal to or greater than 20. The bicycle rim according to item 2 of the scope of patent application, wherein the second roughness Ra is equal to or greater than 15 microns. The bicycle rim according to item 2 or 5 of the scope of patent application, wherein the second glossiness Gs (60 degrees) is equal to or greater than 20. The bicycle rim according to item 2 or 5 of the patent application scope, wherein the first anodized layer and the second anodized layer are connected to each other via the radially inner peripheral portion. The bicycle rim according to item 1 or 2 of the patent application scope, wherein at least one first groove is formed on the first braking surface. The bicycle rim according to item 8 of the patent application, wherein the at least one first groove is a single spiral groove. The bicycle rim according to item 2 or 5 of the scope of patent application, wherein at least one second groove is formed on the second braking surface. The bicycle rim according to claim 10, wherein the at least one second groove is a single spiral groove. A bicycle rim having a rotation center axis, the bicycle rim comprising: a radially outer peripheral portion; a radially inner peripheral portion, which is positioned radially inward from the radially outer peripheral portion with respect to the rotation center axis; A first side wall made of aluminum, the first side wall extending between the radially outer peripheral portion and the radially inner peripheral portion, including a first braking surface, and a first braking surface relative to the rotation center axis from the first A first non-braking surface where the braking surface is positioned radially inward; a first radially outer anodized layer, which is disposed on the first braking surface and has a first layer thickness; and a first radially inner anodized layer A layer disposed on the first non-braking surface and having a second layer thickness that is less than the thickness of the first layer. The bicycle rim according to item 12 of the application, wherein the thickness of the first layer is equal to or greater than 30 microns and equal to or less than 100 microns. The bicycle rim according to item 12 or 13 of the scope of the patent application, wherein the thickness of the second layer is equal to or greater than 2.5 microns and equal to or less than 10 microns. The bicycle rim according to item 12 or 13 of the scope of patent application, further comprising: a second side wall made of aluminum and spaced from the first side wall in the axial direction with respect to the rotation center axis, the A second side wall extends between the radially outer peripheral portion and the radially inner peripheral portion, and includes a second braking surface, and a second positioned radially inward from the second braking surface with respect to the rotation center axis. Non-braking surface; a second radially outer anodized layer provided on the second braking surface and having a third layer thickness; and a second radially inner anodized layer provided on the second non-braking surface And a fourth layer thickness smaller than the third layer thickness. The bicycle rim according to item 15 of the scope of patent application, wherein the thickness of the third layer is equal to or greater than 30 microns and equal to or less than 100 microns. The bicycle rim according to item 15 of the scope of patent application, wherein the thickness of the fourth layer is equal to or greater than 2.5 microns and equal to or less than 10 microns. The bicycle rim according to item 12 or 13 of the scope of patent application, wherein the first radially outer anodized layer is different from the first radially inner anodized layer. The bicycle rim according to item 15 of the application, wherein the second radially outer anodized layer is different from the second radially inner anodized layer. The bicycle rim according to item 15 of the application, wherein the first radially outer anodized layer is different from the first radially inner anodized layer; and the second radially outer anodized layer is different from the second radially outer anodized layer. The radially inner anodized layer is different. The bicycle rim according to item 12 or 13 of the scope of patent application, wherein at least one first groove is formed on the first braking surface. The bicycle rim according to item 21 of the patent application, wherein the at least one first groove is a single spiral groove. The bicycle rim according to item 15 of the scope of patent application, wherein at least one second groove is formed on the second braking surface. The bicycle rim according to item 23 of the patent application, wherein the at least one second groove is a single spiral groove. A bicycle rim having a rotation center axis, the bicycle rim comprising: a radially outer peripheral portion; a radially inner peripheral portion, which is positioned radially inward from the radially outer peripheral portion with respect to the rotation center axis; A first side wall made of aluminum, the first side wall extending between the radially outer peripheral portion and the radially inner peripheral portion, including a first braking surface, and a first braking surface relative to the rotation center axis from the first A first non-braking surface with a braking surface positioned radially inward; a first radially outer anodized layer, which is disposed on the first braking surface and has a first thermal emissivity; and a first radially inner anode An oxide layer is disposed on the first non-braking surface and has a second thermal emissivity greater than the first thermal emissivity. The bicycle rim described in item 25 of the scope of patent application, wherein the first thermal emissivity is less than 81%. The bicycle rim according to item 25 or 26 of the scope of the patent application, wherein the second thermal emissivity is equal to or greater than 81%. The bicycle rim according to item 25 or 26 of the scope of patent application, further comprising: a second side wall made of aluminum and spaced apart from the first side wall in the axial direction with respect to the rotation center axis, the A second side wall extends between the radially outer peripheral portion and the radially inner peripheral portion, and includes a second braking surface, and a second positioned radially inward from the second braking surface with respect to the rotation center axis. Non-braking surface; a second radially outer anodized layer, which is disposed on the second braking surface and has a third thermal emissivity; and a second radially inner anodized layer, which is disposed on the second non-braking The surface has a fourth thermal emissivity greater than the third thermal emissivity. The bicycle rim described in item 28 of the scope of patent application, wherein the third thermal emissivity is less than 81%. The bicycle rim according to item 28 of the scope of patent application, wherein the fourth thermal emissivity is equal to or greater than 81%. The bicycle rim according to item 25 or 26 of the scope of patent application, wherein the first radially outer anodized layer is different from the first radially inner anodized layer. The bicycle rim according to item 28 of the application, wherein the second radially outer anodized layer is different from the second radially inner anodized layer. The bicycle rim according to claim 28, wherein the first radially outer anodized layer is different from the first radially inner anodized layer; and the second radially outer anodized layer is different from the second radially outer anodized layer. The radially inner anodized layer is different. The bicycle rim according to claim 25 or 26, wherein at least one first groove is formed on the first braking surface. The bicycle rim according to claim 34, wherein the at least one first groove is a single spiral groove. The bicycle rim according to claim 28, wherein: at least one second groove is formed on the second braking surface. The bicycle rim according to claim 36, wherein the at least one second groove is a single spiral groove. A bicycle rim having a rotation center axis, the bicycle rim comprising: a radially outer peripheral portion; a radially inner peripheral portion, which is positioned radially inward from the radially outer peripheral portion with respect to the rotation center axis; A first side wall made of aluminum, the first side wall extending between the radially outer peripheral portion and the radially inner peripheral portion, including a first braking surface, and a first braking surface relative to the rotation center axis from the first A first non-braking surface whose braking surface is positioned radially inward; a first radially outer anodized layer, which is disposed on the first braking surface and has a first hardness; and a first radially inner anodized layer , Which is disposed on the first non-braking surface and has a second hardness that is less than the first hardness. The bicycle rim according to item 38 of the scope of patent application, wherein the first hardness is equal to or greater than 300 Hv and equal to or less than 600 Hv. The bicycle rim according to item 38 or 39 of the scope of patent application, wherein the second hardness is equal to or greater than 150 Hv and equal to or less than 250 Hv. The bicycle rim according to item 38 or 39 of the scope of patent application, further comprising: a second side wall made of aluminum and spaced apart from the first side wall in the axial direction with respect to the rotation center axis, the A second side wall extends between the radially outer peripheral portion and the radially inner peripheral portion, and includes a second braking surface, and a second positioned radially inward from the second braking surface with respect to the rotation center axis. Non-braking surface; a second radially outer anodized layer, which is disposed on the second braking surface and has a third hardness; and a second radially inner anodized layer, which is disposed on the second non-braking surface And has a fourth hardness that is less than the third hardness. The bicycle rim according to item 41 of the scope of patent application, wherein the third hardness is equal to or greater than 300 Hv and equal to or less than 600 Hv. The bicycle rim according to item 41 of the scope of application, wherein the fourth hardness is equal to or greater than 150 Hv and equal to or less than 250 Hv. The bicycle rim according to item 38 or 39 of the scope of patent application, wherein the first radially outer anodized layer is different from the first radially inner anodized layer. The bicycle rim according to item 41 of the application, wherein the second radially outer anodized layer is different from the second radially inner anodized layer. The bicycle rim according to item 41 of the application, wherein the first radially outer anodized layer is different from the first radially inner anodized layer; and the second radially outer anodized layer is different from the second The radially inner anodized layer is different. The bicycle rim according to claim 38 or 39, wherein at least one first groove is formed on the first braking surface. The bicycle rim according to item 47 of the patent application, wherein the at least one first groove is a single spiral groove. The bicycle rim according to item 41 of the scope of patent application, wherein at least one second groove is formed on the second braking surface. The bicycle rim according to item 49 of the application, wherein the at least one second groove is a single spiral groove. A bicycle rim having a rotation center axis, the bicycle rim comprising: a radially outer peripheral portion; a radially inner peripheral portion, which is positioned radially inward from the radially outer peripheral portion with respect to the rotation center axis; A first side wall made of aluminum, the first side wall extending between the radially outer peripheral portion and the radially inner peripheral portion, including a first braking surface, and a first braking surface relative to the rotation center axis from the first A first non-braking surface in which a braking surface is positioned radially inward; a first radially outer anodized layer, which is disposed on the first braking surface and has a first brightness (L *); and a first radial An inner anodized layer is disposed on the first non-braking surface and has a second brightness (L *) that is less than the first brightness (L *). The bicycle rim according to item 51 of the scope of patent application, wherein the first brightness (L *) is equal to or greater than 26.5 and equal to or less than 35. The bicycle rim according to item 51 or 52 of the scope of patent application, wherein the second brightness (L *) is equal to or greater than 20 and equal to or less than 26. The bicycle rim according to item 51 or 52 of the scope of patent application, further comprising: a second side wall made of aluminum and spaced from the first side wall in the axial direction with respect to the rotation center axis, the A second side wall extends between the radially outer peripheral portion and the radially inner peripheral portion, and includes a second braking surface, and a second positioned radially inward from the second braking surface with respect to the rotation center axis. Non-braking surface; a second radially outer anodized layer, which is disposed on the second braking surface and has a third brightness (L *); and a second radially inner anodized layer, which is disposed on the second The non-braking surface has a fourth brightness (L *) that is less than the third brightness (L *). The bicycle rim according to item 54 of the scope of patent application, wherein the third brightness (L *) is equal to or greater than 26.5 and equal to or less than 35. The bicycle rim according to item 54 of the application, wherein the fourth brightness (L *) is equal to or greater than 20 and equal to or less than 26. The bicycle rim according to item 51 or 52 of the scope of patent application, wherein the first radially outer anodized layer is different from the first radially inner anodized layer. The bicycle rim according to item 54 of the application, wherein the second radially outer anodized layer is different from the second radially inner anodized layer. The bicycle rim according to claim 54, wherein the first radially outer anodized layer is different from the first radially inner anodized layer; and the second radially outer anodized layer is different from the second radially outer anodized layer. The radially inner anodized layer is different. The bicycle rim according to claim 51 or 52, wherein at least one first groove is formed on the first braking surface. The bicycle rim according to claim 60, wherein the at least one first groove is a single spiral groove. The bicycle rim according to claim 54 in which at least one second groove is formed on the second braking surface. The bicycle rim according to item 62 of the application, wherein the at least one second groove is a single spiral groove.