US 12,222,020 B2
Wrapped joined V-belt
Takeshi Kimura, Hyogo (JP); and Yoshihito Nakaoji, Hyogo (JP)
Assigned to Mitsuboshi Belting Ltd., Kobe (JP)
Appl. No. 17/254,636
Filed by Mitsuboshi Belting Ltd., Kobe (JP)
PCT Filed May 29, 2019, PCT No. PCT/JP2019/021396
§ 371(c)(1), (2) Date Dec. 21, 2020,
PCT Pub. No. WO2020/003872, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. 2018-119730 (JP), filed on Jun. 25, 2018; and application No. 2019-092308 (JP), filed on May 15, 2019.
Prior Publication US 2021/0148436 A1, May 20, 2021
Int. Cl. F16G 5/08 (2006.01); B32B 5/02 (2006.01); B32B 25/04 (2006.01); B32B 25/10 (2006.01); B32B 25/18 (2006.01); C08L 11/00 (2006.01); F16G 5/20 (2006.01); F16G 5/22 (2006.01)
CPC F16G 5/08 (2013.01) [B32B 5/024 (2013.01); B32B 25/042 (2013.01); B32B 25/10 (2013.01); B32B 25/18 (2013.01); C08L 11/00 (2013.01); F16G 5/20 (2013.01); F16G 5/22 (2013.01); B32B 2262/0276 (2013.01); B32B 2262/062 (2013.01); B32B 2262/14 (2013.01); B32B 2307/536 (2013.01); B32B 2307/54 (2013.01); B32B 2433/04 (2013.01); C08L 2205/03 (2013.01); C08L 2205/06 (2013.01); C08L 2205/16 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A wrapped joined V-belt, comprising: a plurality of wrapped V-belt portions; and a tie band, wherein outer peripheral surfaces of the wrapped V-belt portions are coupled via the tie band, each of the wrapped V-belt portions comprises a tension member layer comprising a tension member, a tension rubber layer laminated on the tension member layer at a belt outer peripheral side, a compression rubber layer laminated on the tension member layer at a belt inner peripheral side, and an outside cloth covering an entire outer surface of the belt,
wherein in each of the wrapped V-belt portions, the compression rubber layer comprises a first compression rubber layer laminated at the belt outer peripheral side and a second compression rubber layer laminated at the belt inner peripheral side, and in a V-shaped cross section of the wrapped V-belt portion, a side where a belt width is wide is the belt outer peripheral side, and a side where the belt width is narrow is the belt inner peripheral side,
the tension rubber layer has a rubber hardness that is higher than a rubber hardness of the second compression rubber layer,
the first compression rubber layer has a rubber hardness that is higher than the rubber hardness of the tension rubber layer,
in each of the wrapped V-belt portions, the first compression rubber layer has an average thickness of from 90% to 50% with respect to an average thickness of the entire compression rubber layer, and
a difference in rubber hardness Hs (JIS A) between the first compression rubber layer and the tension rubber layer is from 3 to 10.