WO2022158582A1 - 歯付ベルト - Google Patents
歯付ベルト Download PDFInfo
- Publication number
- WO2022158582A1 WO2022158582A1 PCT/JP2022/002298 JP2022002298W WO2022158582A1 WO 2022158582 A1 WO2022158582 A1 WO 2022158582A1 JP 2022002298 W JP2022002298 W JP 2022002298W WO 2022158582 A1 WO2022158582 A1 WO 2022158582A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tooth
- belt
- rubber
- reinforcing
- reinforcing layer
- Prior art date
Links
- 239000000835 fiber Substances 0.000 claims abstract description 221
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 68
- 230000003014 reinforcing effect Effects 0.000 claims description 152
- 230000002787 reinforcement Effects 0.000 abstract description 27
- 239000010410 layer Substances 0.000 description 263
- 229920001971 elastomer Polymers 0.000 description 227
- 239000005060 rubber Substances 0.000 description 226
- 239000004744 fabric Substances 0.000 description 70
- 239000000203 mixture Substances 0.000 description 53
- 238000011282 treatment Methods 0.000 description 42
- 230000000052 comparative effect Effects 0.000 description 38
- 238000000034 method Methods 0.000 description 37
- 230000035882 stress Effects 0.000 description 30
- 229910052751 metal Inorganic materials 0.000 description 29
- 239000002184 metal Substances 0.000 description 29
- 238000005452 bending Methods 0.000 description 26
- 239000012763 reinforcing filler Substances 0.000 description 26
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 22
- 229920000049 Carbon (fiber) Polymers 0.000 description 21
- 239000004917 carbon fiber Substances 0.000 description 21
- -1 etc.] Polymers 0.000 description 20
- 150000003839 salts Chemical class 0.000 description 20
- 230000007423 decrease Effects 0.000 description 18
- 230000002093 peripheral effect Effects 0.000 description 17
- 229920005989 resin Polymers 0.000 description 17
- 239000011347 resin Substances 0.000 description 17
- 229920000459 Nitrile rubber Polymers 0.000 description 16
- 238000004132 cross linking Methods 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 239000002245 particle Substances 0.000 description 14
- 229920006231 aramid fiber Polymers 0.000 description 13
- 229910052740 iodine Inorganic materials 0.000 description 13
- 239000004014 plasticizer Substances 0.000 description 13
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 12
- 238000004458 analytical method Methods 0.000 description 12
- 239000011630 iodine Substances 0.000 description 12
- 239000007788 liquid Substances 0.000 description 12
- 239000011295 pitch Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 11
- 229920001187 thermosetting polymer Polymers 0.000 description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 8
- 239000004952 Polyamide Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000013329 compounding Methods 0.000 description 8
- 239000003431 cross linking reagent Substances 0.000 description 8
- 230000006866 deterioration Effects 0.000 description 8
- 239000011737 fluorine Substances 0.000 description 8
- 229910052731 fluorine Inorganic materials 0.000 description 8
- 229920002647 polyamide Polymers 0.000 description 8
- 229920000728 polyester Polymers 0.000 description 8
- 238000004073 vulcanization Methods 0.000 description 8
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 7
- 239000004760 aramid Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000003822 epoxy resin Substances 0.000 description 6
- 229920000126 latex Polymers 0.000 description 6
- 239000004816 latex Substances 0.000 description 6
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 6
- 239000000391 magnesium silicate Substances 0.000 description 6
- 229910052919 magnesium silicate Inorganic materials 0.000 description 6
- 235000019792 magnesium silicate Nutrition 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 230000000737 periodic effect Effects 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
- 239000002243 precursor Substances 0.000 description 6
- 239000002759 woven fabric Substances 0.000 description 6
- 229920002943 EPDM rubber Polymers 0.000 description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 description 5
- 239000003365 glass fiber Substances 0.000 description 5
- 230000020169 heat generation Effects 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 4
- 229920001084 poly(chloroprene) Polymers 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 150000004760 silicates Chemical class 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 229920002302 Nylon 6,6 Polymers 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 230000003712 anti-aging effect Effects 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000012784 inorganic fiber Substances 0.000 description 3
- 239000012948 isocyanate Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000011164 primary particle Substances 0.000 description 3
- 229960001755 resorcinol Drugs 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920002994 synthetic fiber Polymers 0.000 description 3
- 239000012209 synthetic fiber Substances 0.000 description 3
- 239000000454 talc Substances 0.000 description 3
- 229910052623 talc Inorganic materials 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- 101100140855 Arabidopsis thaliana RFL1 gene Proteins 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 2
- QUEICCDHEFTIQD-UHFFFAOYSA-N buta-1,3-diene;2-ethenylpyridine;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=N1 QUEICCDHEFTIQD-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 150000001991 dicarboxylic acids Chemical class 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 229920002681 hypalon Polymers 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 150000001451 organic peroxides Chemical class 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 229920001281 polyalkylene Polymers 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920002215 polytrimethylene terephthalate Polymers 0.000 description 2
- 239000002964 rayon Substances 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 102220187649 rs145044428 Human genes 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229910052604 silicate mineral Inorganic materials 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- UBRWPVTUQDJKCC-UHFFFAOYSA-N 1,3-bis(2-tert-butylperoxypropan-2-yl)benzene Chemical compound CC(C)(C)OOC(C)(C)C1=CC=CC(C(C)(C)OOC(C)(C)C)=C1 UBRWPVTUQDJKCC-UHFFFAOYSA-N 0.000 description 1
- IPJGAEWUPXWFPL-UHFFFAOYSA-N 1-[3-(2,5-dioxopyrrol-1-yl)phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C1=CC=CC(N2C(C=CC2=O)=O)=C1 IPJGAEWUPXWFPL-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- BMFMTNROJASFBW-UHFFFAOYSA-N 2-(furan-2-ylmethylsulfinyl)acetic acid Chemical compound OC(=O)CS(=O)CC1=CC=CO1 BMFMTNROJASFBW-UHFFFAOYSA-N 0.000 description 1
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 239000004953 Aliphatic polyamide Substances 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920000271 Kevlar® Polymers 0.000 description 1
- 229920003372 Kevlar® 119 Polymers 0.000 description 1
- 229920003369 Kevlar® 49 Polymers 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229920000784 Nomex Polymers 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 229920003189 Nylon 4,6 Polymers 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- QAPVYZRWKDXNDK-UHFFFAOYSA-N P,P-Dioctyldiphenylamine Chemical compound C1=CC(CCCCCCCC)=CC=C1NC1=CC=C(CCCCCCCC)C=C1 QAPVYZRWKDXNDK-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- 229920002334 Spandex Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229920000561 Twaron Polymers 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 1
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 1
- 229920003231 aliphatic polyamide Polymers 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 229940009868 aluminum magnesium silicate Drugs 0.000 description 1
- WMGSQTMJHBYJMQ-UHFFFAOYSA-N aluminum;magnesium;silicate Chemical compound [Mg+2].[Al+3].[O-][Si]([O-])([O-])[O-] WMGSQTMJHBYJMQ-UHFFFAOYSA-N 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- KVBYPTUGEKVEIJ-UHFFFAOYSA-N benzene-1,3-diol;formaldehyde Chemical compound O=C.OC1=CC=CC(O)=C1 KVBYPTUGEKVEIJ-UHFFFAOYSA-N 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052800 carbon group element Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 150000001733 carboxylic acid esters Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 229920003244 diene elastomer Polymers 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 229920005558 epichlorohydrin rubber Polymers 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 229910001849 group 12 element Inorganic materials 0.000 description 1
- 229910021480 group 4 element Inorganic materials 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 229920006168 hydrated nitrile rubber Polymers 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 150000002763 monocarboxylic acids Chemical class 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000004763 nomex Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 229920002577 polybenzoxazole Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001955 polyphenylene ether Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920006306 polyurethane fiber Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 229940116351 sebacate Drugs 0.000 description 1
- CXMXRPHRNRROMY-UHFFFAOYSA-L sebacate(2-) Chemical compound [O-]C(=O)CCCCCCCCC([O-])=O CXMXRPHRNRROMY-UHFFFAOYSA-L 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000004759 spandex Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 239000004762 twaron Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G1/00—Driving-belts
- F16G1/28—Driving-belts with a contact surface of special shape, e.g. toothed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G1/00—Driving-belts
- F16G1/06—Driving-belts made of rubber
- F16G1/08—Driving-belts made of rubber with reinforcement bonded by the rubber
- F16G1/10—Driving-belts made of rubber with reinforcement bonded by the rubber with textile reinforcement
Definitions
- the present invention relates to a toothed belt used for synchronous transmission of devices that transmit high loads by means of belts.
- Friction transmission belts include flat belts, V-belts and V-ribbed belts, and meshing transmission belts include toothed belts.
- the toothed belt has a back portion in which core wires are embedded substantially parallel to the circumferential direction of the belt, tooth portions arranged at predetermined intervals in the circumferential direction of the belt, and a tooth cloth covering the surfaces of the tooth portions. .
- the teeth of the toothed belt are engaged with pulleys having grooves facing them to transmit power.
- the toothed belt does not slip between the pulleys and can reliably transmit high loads.
- tooth chipping One of the failure modes of toothed belts is tooth chipping, where the teeth are missing from the belt body. It is believed that this tooth chipping occurs due to repeated deformation of the tooth portion during the process in which stress concentrates on the root of the tooth portion. As the cause of the occurrence of tooth chipping, a mechanism is considered in which first, a minute crack is generated at the root of the tooth, and then the crack grows. In particular, when the toothed belt is used under conditions where a high load acts, the stress concentrated on the tooth base becomes particularly large, and cracks are likely to occur starting from the tooth base, leading to tooth chipping.
- Patent Document 4 since the invention relates to a cogged V-belt, which is different from a toothed belt, there is no problem of "reinforcement of the tooth base and prevention of tooth chipping", but as a reinforcement of the V-belt, a compression rubber layer A cogged V-belt is disclosed in which a reinforcing layer made of fiber-reinforced resin is embedded along the cog shape. This reinforcing layer contains carbon fibers oriented in the belt width direction.
- the appearance of the cogged V-belt of Patent Document 4 is similar to a toothed belt, the toothed belt is a meshing transmission belt that transmits power by meshing transmission by fitting the toothed portion with the pulley groove.
- cogged V-belts are classified as friction transmission belts that perform friction transmission by bringing the side of the belt into contact with the pulleys without the lower surface (inner peripheral surface) of the belt coming into contact with the pulleys. It is another type of power transmission belt with a completely different mechanism.
- Patent Document 5 since the invention relates to a V-belt, which is different from a toothed belt, there is no problem of "reinforcement of tooth base and prevention of tooth chipping", but fiber filaments are used to reinforce the V-belt in one direction.
- a V-belt is disclosed in which a sheet (unidirectional fiber sheet) is embedded as a reinforcing layer.
- the purpose of the reinforcement layer of the V-belt is to reinforce the width direction of the belt in order to increase the resistance to the lateral pressure received from the pulleys on both sides of the V-shaped belt. is oriented to
- the belt does not come into contact with the pulleys in the width direction, but the teeth come into contact with the pulleys in the circumferential direction of the belt, so reinforcement in the circumferential direction is required. Therefore, in a toothed belt, the fiber filaments are oriented in the circumferential direction. meshing with) is reduced.
- the reinforcement layer of the toothed belt requires a unique design concept that considers compatibility with the flexibility (bendability) of the toothed belt (which contradicts reinforcement).
- an object of the present invention is to provide a toothed belt that secures sufficient tooth root crack (tooth chipping) resistance while securing flexibility.
- the present invention provides a toothed belt having teeth arranged at predetermined intervals in the circumferential direction of the belt and a reinforcing layer embedded along the contour of the teeth.
- the reinforcing layer is arranged such that the maximum height from the bottom of the tooth to the reinforcing layer is in the range of 30 to 100% of the height from the bottom of the tooth to the tip of the tooth.
- the reinforcing layer includes a plurality of reinforcing fiber filaments arranged in the circumferential direction of the belt, and in the reinforcing layer, the weight per unit area of the fibers intersecting in the circumferential direction of the belt is equal to the weight of the reinforcing fiber 30% or less of the weight per unit area of the filament,
- the reinforcing layer has a structure in which the reinforcing fiber filaments are arranged in a non-twisted state and bonded to form a sheet while being arranged in the circumferential direction of the belt,
- the thickness of the reinforcing layer is 0.05 to 0.2 mm
- the tensile modulus (GPa) of the reinforcing fiber filament is 5 ⁇ [thickness of the reinforcing layer (mm)] ⁇ [tensile elastic modulus of the reinforcing fiber filament (GPa)] ⁇ 60 It is characterized by satisfying the conditions of
- a plurality of reinforcing fiber filaments are embedded in the toothed belt as a reinforcing layer in a sheet form while being arranged in the belt circumferential direction. Furthermore, since the plurality of reinforcing fiber filaments constituting the reinforcing layer are combined in a sheet form, disturbance of the orientation of the reinforcing fiber filaments can be prevented.
- the reinforcing layer contains fibers intersecting in the circumferential direction of the belt in an amount of 30% or less of the weight per unit area of the reinforcing fiber filaments. Therefore, substantially the same flexibility as when no reinforcing layer is provided can be ensured. That is, it is possible to suppress deterioration in flexibility of the toothed belt.
- the thickness of the reinforcing layer can be reduced by embedding the reinforcing fiber filaments in an untwisted state.
- "untwisted" means that the number of twists is 1/10 cm or less.
- heat generation due to friction between fibers during bending is less likely to occur.
- by suppressing a decrease in flexibility it is possible to suppress heat generation of the toothed belt due to bending when the toothed belt is wound around and separated from the pulley. Therefore, temperature rise of the toothed belt during running can be suppressed.
- the thickness of the reinforcing layer is 0.05 to 0.2 mm.
- the thickness of the reinforcing layer exceeds 0.2 mm, bending fatigue resistance may deteriorate due to an increase in bending rigidity (decrease in flexibility).
- the thickness of the reinforcing layer is less than 0.05 mm, it may not be possible to ensure sufficient root crack (tooth chipping) resistance.
- the untwisted reinforcing fiber filament has a high effect of improving the tooth root crack (tooth chipping) resistance, even if the reinforcing layer is as thin as 0.05 to 0.2 mm, the bending fatigue resistance Sufficient tooth root crack (tooth chipping) resistance can be ensured while suppressing a decrease in the
- the "thickness of the reinforcing layer” refers to the thickness of each reinforcing layer even when there are a plurality of reinforcing layers.
- the tensile modulus (GPa) of the reinforcing fiber filament contained in the reinforcing layer is an index value representing the rigidity of the reinforcing layer, "[thickness of the reinforcing layer (mm)] ⁇ [tensile elasticity of the reinforcing fiber filament ratio (GPa)]” value (index Z) of 5 or more and 60 or less, while suppressing a decrease in bending fatigue resistance when the thickness of the reinforcing layer is in the range of 0.05 to 0.2 mm. , sufficient dedendum crack resistance can be ensured.
- the reinforcing fiber filaments are bound in a sheet form and do not come apart, the reinforcing layer can be easily handled during the production of the toothed belt. Specifically, it is possible to easily perform the work of winding a sheet that serves as a reinforcing layer on the unvulcanized rubber and the work of applying an adhesive treatment such as RFL treatment or rubber paste treatment to the reinforcing layer.
- the tensile modulus of elasticity of the reinforcing fiber filament may be 50 to 300 GPa.
- the tensile modulus of the reinforcing fiber filament is less than 50 GPa, it may not be possible to ensure sufficient root crack (tooth chipping) resistance.
- the tensile modulus of the reinforcing fiber filament is set to 50 GPa or more, even if the thickness of the reinforcing layer is reduced, a decrease in bending fatigue resistance is suppressed, and sufficient tooth root crack (tooth chipping) resistance is obtained. can be ensured.
- the tensile modulus of the reinforcing fiber filament is 300 GPa or less, the effect of suppressing the above problems can be ensured, and the life of the toothed belt can be extended.
- the thickness of the reinforcing fiber filament may be 0.1 to 50 ⁇ m.
- the reinforcing layer in the toothed belt, may be characterized by not containing fibers intersecting in the circumferential direction of the belt.
- the weight per unit area of the fibers intersecting in the circumferential direction of the belt in the reinforcing layer is 0% of the weight per unit area of the reinforcing fiber filaments, it is the same as when the reinforcing layer is not provided in the toothed belt. flexibility can be ensured.
- FIG. 1 is a cross-sectional perspective view of a toothed belt according to an embodiment.
- FIG. 2 is a cross-sectional view in the belt circumferential direction of the toothed belt according to the embodiment.
- FIG. 3 is an explanatory diagram of the belt circumferential direction of the toothed belt according to the embodiment.
- FIG. 4 is a cross-sectional view in the belt width direction of the reinforcing layer according to the embodiment.
- FIG. 5 is an explanatory diagram of a preforming process related to the method of manufacturing a toothed belt.
- FIG. 6 is an explanatory diagram of a preforming process related to the method of manufacturing a toothed belt.
- FIG. 7 is an explanatory diagram of a preforming process related to the method of manufacturing a toothed belt.
- FIG. 8 is an explanatory diagram of a preforming process related to the method of manufacturing a toothed belt.
- FIG. 9 is an explanatory diagram of a two-dimensional finite element method analysis model of toothed belts according to Examples and Comparative Examples.
- FIG. 10 is an explanatory diagram of a tooth shear test of toothed belts according to Examples and Comparative Examples.
- FIG. 11 is an explanatory diagram of a tooth shear test of toothed belts according to Examples and Comparative Examples.
- FIG. 12 is a table summarizing comprehensive judgment results and the like according to Examples 1-3 and Comparative Examples 1-2.
- FIG. 13A is a graph showing the relationship between H2/H1 and tooth stiffness in FIG.
- FIG. 13A is a graph showing the relationship between H2/H1 and tooth stiffness in FIG.
- FIG. 13A is a graph showing the relationship between H2/H1 and tooth stiffness in FIG.
- FIG. 13A is a graph showing the relationship between H2/H1 and tooth
- FIG. 13B is a graph showing the relationship between H2/H1 and Mises stress in FIG.
- FIG. 14 is a table summarizing comprehensive judgment results and the like according to Example 1, Examples 4 and 5, and Reference Examples 1 and 2.
- FIG. FIG. 15(A) is a graph showing the relationship between the unidirectional fiber elastic modulus and the tooth stiffness in FIG.
- FIG. 15B is a graph showing the relationship between the unidirectional fiber elastic modulus and the Mises stress in FIG. (A) and (B) of FIG. 16 are explanatory diagrams of the tooth stiffness test according to the example.
- FIG. 17 is a graph of measured values of tooth stiffness showing results of a tooth stiffness test according to an example.
- the toothed belt 1 of this embodiment is an endless meshing power transmission belt, and as shown in FIGS. , and a plurality of tooth portions 3 arranged at predetermined intervals along the inner peripheral surface of the back portion 2 .
- the toothed portion 3 of the toothed belt 1 of the present embodiment includes a first rubber layer (surface rubber layer) 33 and a second rubber layer (inner rubber layer) 34 on the belt inner peripheral surface side of the core wire 4. It has a tooth rubber layer composed of.
- a reinforcing layer 5 is embedded in the belt circumferential direction along the contour of the tooth portion 3 between the first rubber layer 33 and the second rubber layer 34 . That is, the first rubber layer 33 is arranged along the contour of the tooth portion 3 on the belt inner peripheral surface side of the reinforcing layer 5 , and the second rubber layer 34 is arranged between the reinforcing layer 5 and the core wire 4 . provided (in contact with the reinforcing layer 5 and the core wire 4).
- the first rubber layer 33 and the second rubber layer 34 are collectively referred to as tooth rubber layers.
- Flat tooth bottom portions 7 are present between adjacent tooth portions 3 and tooth portions 3, and the tooth portions 3 and tooth bottom portions 7 are alternately arranged along the circumferential direction (belt longitudinal direction) on the inner circumferential surface of the belt. is formed in In the embodiment shown in FIGS. 1 to 3, one continuous tooth cloth 6 is provided on the surface of the tooth portion 3 and the inner peripheral surface of the back portion 2 (that is, the surface of the tooth bottom portion 7).
- the tooth cloth 6 may be used as necessary from the viewpoint of wear resistance and tooth chipping resistance of the tooth portion 3 .
- the tooth cloth 6 forming the surface of the tooth portion 3 is a constituent element of the tooth portion 3, while the tooth cloth 6 forming the surface of the tooth bottom portion 7 is a constituent element of the back portion 2. be.
- each tooth cloth 6 constituting the tooth portion 3 is a part of the continuous tooth cloth 6 (a part of the tooth cloth 6 in FIG. 1).
- a first rubber layer as a surface rubber layer, a reinforcing layer, and a second rubber layer as an inner rubber layer are interposed between the tooth cloth 6 and the core wire 4. (not shown).
- the thicknesses of the first rubber layer and the second rubber layer in the tooth bottom portion 7 are significantly thinner than the thicknesses of the first rubber layer 33 and the second rubber layer 34 in the tooth portion 3 .
- the back portion 2 has a back rubber layer 21 disposed on the belt outer peripheral surface side of the core wire 4, and the back rubber layer 21 forms the belt outer peripheral surface.
- the core wires 4 extend in the belt circumferential direction (belt longitudinal direction) and are arranged at intervals in the belt width direction.
- the gaps between the adjacent cords 4 may be formed of the rubber composition that constitutes the back rubber layer 21 and/or the second rubber layer (in particular, the rubber composition that constitutes the back rubber layer 21).
- the toothed belt 1 is used for high-load transmission applications such as industrial machinery, internal combustion engines of automobiles, and rear wheel drive of motorcycles. For example, in a state in which the toothed belt 1 is wound between a drive pulley (toothed pulley) and a driven pulley (toothed pulley), power is transferred from the drive pulley side to the driven pulley side by the rotation of the drive pulley. introduce.
- the toothed belt 1 is not limited to the form or structure shown in FIGS. 1 to 3.
- the plurality of teeth 3 need only be able to mesh with the toothed pulley
- the cross-sectional shape of the teeth 3 is not limited to a substantially trapezoidal shape. It may be semicircular, semielliptical, polygonal (triangular, quadrangular (rectangular, etc.), etc.). Of these, a substantially trapezoidal shape is preferable from the viewpoint of meshing power transmission.
- the interval (tooth pitch) between the tooth portions 3 adjacent in the circumferential direction may be, for example, 2 to 25 mm.
- the numerical value of the tooth pitch also corresponds to the size of the scale of the tooth portion 3 (the length of the tooth portion 3 in the belt circumferential direction and the tooth height H1 of the tooth portion 3). That is, the larger the tooth pitch, the larger the scale of the tooth portion 3 analogously.
- the tooth pitch may be 5 mm or more, preferably 8 mm or more, and more preferably 14 mm or more.
- the average tooth height of the tooth portion 3 may be 40 to 70%, preferably 50 to 65%, of the average thickness of the entire belt. As shown in FIG. 3, the average tooth height of the tooth portions 3 is the average height of the tooth portions 3 protruding from the inner circumferential surface of the belt (the average height of the tooth portions 3 protruding from the tooth bottom portion 7). ).
- the tooth portion 3 has a surface composed of the tooth cloth 6 . It includes a reinforcing layer 5 arranged on the surface side, and a second rubber layer 34 arranged on the belt outer peripheral surface side of the reinforcing layer 5 .
- the first rubber layer 33 and the second rubber layer 34 may be made of different rubber compositions or may be made of the same rubber composition.
- the tooth portion 3 (first rubber layer 33, second rubber layer 34) is made of a rubber composition having a hardness of 60 degrees or more and 66 degrees or less in JIS-D hardness (value measured using a type D durometer).
- JIS-D hardness is hardness based on JIS K 6253 (2012), and is the hardness of the side surface of the toothed portion 3 of the toothed belt 1 measured using a type D durometer.
- JIS-A hardness (value measured using a type A durometer) is often used as the rubber hardness of a rubber composition. It is preferred to use the D durometer.
- the hardness of the tooth portion 3 is higher than that of the back portion 2, which will be described later, and the JIS-A hardness exceeds 90 degrees. Therefore, the hardness of the tooth portion 3 is evaluated by JIS-D hardness.
- Rubber component of the rubber composition (crosslinked rubber composition) constituting the tooth portion 3 include diene rubbers [natural rubber, isoprene rubber, butadiene rubber, chloroprene rubber, butyl rubber, , styrene-butadiene rubber (SBR), vinylpyridine-styrene-butadiene rubber, acrylonitrile-butadiene rubber (nitrile rubber: NBR), acrylonitrile-chloroprene rubber, hydrogenated nitrile rubber (HNBR), etc.], ethylene- ⁇ -olefin elastomer [ ethylene-propylene copolymer (EPM), ethylene-propylene-diene terpolymer (EPDM), etc.], chlorosulfonated polyethylene rubber (CSM), alkylated chlorosulfonated polyethylene rubber (ACSM), epichlorohydrin rubber, acrylic rubber, silicone
- These rubber components may be carboxylated, such as carboxylated SBR, carboxylated NBR, and the like. These rubber components can be used alone or in combination of two or more.
- a particularly preferred rubber component is hydrogenated nitrile rubber (HNBR), and chloroprene rubber and ethylene-propylene-diene terpolymer (EPDM) are also suitably used.
- a preferred rubber component, particularly for applications in which high loads are applied, is a highly heat aging resistant rubber, in particular a hydrogenated nitrile rubber.
- the ratio of the preferred rubber component is preferably 50% by mass or more (for example, about 80 to 100% by mass), particularly preferably 100% by mass.
- the hydrogenation rate of the hydrogenated nitrile rubber can be selected from the range of about 50 to 100%, and may be 70 to 100%.
- HNBR maintains the oil resistance that is an advantage of conventional nitrile rubber, while preventing deterioration of rubber elasticity due to the recombination reaction of sulfur during heat aging. Double bonds) are chemically hydrogenated to make the recombination reaction less likely to occur during heat aging and to improve heat resistance.
- the iodine value (unit: mg/100 mg) of HNBR is, for example, 5-60 (eg, 7-50), preferably 8-40 (eg, 8-35), more preferably 10-30.
- the iodine value is an index representing the amount of unsaturated bonds, and the higher the iodine value, the greater the amount of unsaturated bonds contained in the polymer molecular chain.
- the iodine value is obtained by adding excess iodine to a sample to be measured to allow complete reaction (iodine reacts with unsaturated bonds), and then quantifying the amount of remaining iodine by oxidation-reduction titration.
- the iodine value of HNBR When the iodine value of HNBR is small, the cross-linking reaction between HNBRs is not sufficient, and the rigidity of the cross-linked rubber is low, so there is a possibility that the resistance to deformation and tooth chipping during running of the belt may be reduced. On the other hand, when the iodine value of HNBR is high, the amount of unsaturated bonds is excessively increased, and the crosslinked rubber may be deteriorated by heat or oxidation, which may shorten the life of the belt.
- the rubber component preferably contains a composite polymer or polymer alloy containing a hydrogenated nitrile rubber and an unsaturated carboxylic acid metal salt (hereinafter referred to as "HNBR containing an unsaturated carboxylic acid metal salt").
- This polymer can increase the modulus and hardness of the tooth portion, suppress deformation of the rubber, and suppress the growth of root cracks.
- the unsaturated carboxylic acid metal salt may be a compound in which an unsaturated carboxylic acid having one or more carboxyl groups and a metal are ionically bonded.
- the unsaturated carboxylic acid of the unsaturated carboxylic acid metal salt includes, for example, monocarboxylic acids such as (meth)acrylic acid and crotonic acid, dicarboxylic acids such as maleic acid, fumaric acid and itaconic acid, and monoalkyls of these dicarboxylic acids. Ester etc. can be illustrated. These unsaturated carboxylic acids can be used alone or in combination of two or more. A preferred unsaturated carboxylic acid is (meth)acrylic acid.
- polyvalent metals such as periodic table group 2 elements (magnesium, calcium, etc.), periodic table group 4 elements (titanium, zirconium, etc.), periodic table groups 8 to 4 Group 14 elements (eg, iron, cobalt, nickel, copper, zinc, aluminum, tin, lead, etc.) can be exemplified. These metals can also be used individually or in combination of 2 or more types. Preferred metals are Group 2 elements of the periodic table (such as magnesium) and Group 12 elements of the periodic table (such as zinc).
- Preferable unsaturated carboxylic acid metal salts include zinc (meth)acrylate and magnesium (meth)acrylate. Unsaturated carboxylic acid metal salts can also be used alone or in combination of two or more.
- HNBR containing unsaturated carboxylic acid metal salt A commercially available product may be used as the "HNBR containing unsaturated carboxylic acid metal salt".
- HNBR high finely dispersing zinc methacrylate as an unsaturated carboxylic acid metal salt in HNBR (for example, trade name “Zeoforte (ZSC)” manufactured by Nippon Zeon Co., Ltd.) can be used.
- HNBR containing unsaturated carboxylic acid metal salt is preferably used as a mixture with hydrogenated nitrile rubber (HNBR) that does not contain unsaturated carboxylic acid metal salt.
- the mass ratio between the hydrogenated nitrile rubber and the unsaturated carboxylic acid metal salt may be adjusted by mixing the commercially available "HNBR containing the unsaturated carboxylic acid metal salt” and the commercially available hydrogenated nitrile rubber. Modulus and hardness may be adjusted by changing the mixing ratio of both.
- the proportion of "HNBR containing unsaturated carboxylic acid metal salt” may be 10% by mass or more in the rubber component, particularly in the case of a rubber composition forming teeth, preferably 30% by mass or more, more preferably It is 50% by mass or more, more preferably 80% by mass or more, most preferably 90% by mass or more, and may be 100% by mass. These percentages may be percentages in the product "Zeoforte (ZSC)".
- At least one selected from the group consisting of EPDM and CR is preferable as another rubber component to be combined with "HNBR containing unsaturated carboxylic acid metal salt".
- the proportion of other rubber components in the rubber component is 80% by mass or less, preferably 50% by mass or less, more preferably 30% by mass or less, and most preferably 10% by mass or less.
- the crosslinked rubber composition may further contain a filling compounding agent.
- filler compounding agents include reinforcing fillers, non-reinforcing fillers, short fibers, and the like.
- reinforcing fillers examples include carbon black and silica. These reinforcing fillers can be used alone or in combination of two or more.
- the reinforcing filler may be powdered.
- the proportion of the reinforcing filler may be 10 parts by mass or less, preferably 5 parts by mass or less, more preferably 1 part by mass, and more preferably 0 parts by mass with respect to 100 parts by mass of the rubber component.
- the ratio of the reinforcing filler is, for example, 0.1 to 8 parts by mass, preferably 0.5 to 5 parts by mass, more preferably 0.5 to 5 parts by mass, with respect to 100 parts by mass of the rubber component. may be 1 to 3 parts by mass. If the proportion of the reinforcing filler is too high, the heat generation of the rubber composition is increased and the heat resistance is lowered, so that there is a possibility that cracks or tooth chipping may occur due to thermal deterioration.
- Non-reinforcing fillers include, for example, polyvalent metal carbonates (calcium carbonate, magnesium carbonate, etc.), polyvalent metal hydroxides (aluminum hydroxide, etc.), polyvalent metal sulfates (barium sulfate, etc.), silicic acid Salts (aluminum silicate, magnesium silicate, natural or synthetic silicates in which a portion of silicon is substituted with polyvalent metal atoms, such as aluminum magnesium silicate; minerals containing silicates as main components, e.g. Clay containing aluminum, talc containing magnesium silicate and silicate minerals such as mica), lithopone, silica sand and the like can be exemplified.
- polyvalent metal carbonates calcium carbonate, magnesium carbonate, etc.
- polyvalent metal hydroxides aluminum hydroxide, etc.
- polyvalent metal sulfates barium sulfate, etc.
- silicic acid Salts aluminum silicate, magnesium silicate, natural
- non-reinforcing fillers can be used alone or in combination of two or more.
- Preferred non-reinforcing fillers are calcium carbonate, magnesium carbonate, aluminum hydroxide, barium sulfate, silicates (silicates such as aluminum silicate, magnesium silicate, magnesium aluminum silicate, or silicate minerals (talc , clay, mica, etc.)).
- the non-reinforcing filler contains calcium carbonate, magnesium silicate, or magnesium silicate because it has a large effect of improving the processability of the belt and the dispersibility of the compounding agent, and is less likely to cause poor dispersion of the compounding agent. It preferably contains at least one selected from talc, aluminum silicate or clay containing aluminum silicate, and particularly preferably contains calcium carbonate.
- powdery fillers commercially available as rubber fillers can be used.
- the average particle size (average primary particle size) of the non-reinforcing filler is, for example, 0.01 to 25 ⁇ m (eg, 0.2 to 20 ⁇ m), preferably 0.5 to 17 ⁇ m (eg, 1 to 15 ⁇ m). You can select from a range.
- the average particle size (average primary particle size) of the non-reinforcing filler is, for example, 0.01 to 3 ⁇ m (eg, 0.02 to 2 ⁇ m), preferably 0.05 to 1.5 ⁇ m (eg, 0.1 to 1 ⁇ m).
- the average particle size (average primary particle size) of the non-reinforcing filler may be relatively large, for example, 0.2 to 5 ⁇ m (eg, 0.3 to 3 ⁇ m), preferably 0.5 to 2.0 ⁇ m. It may be 5 ⁇ m (eg, 1-2 ⁇ m).
- the non-reinforcing filler may be pulverized or crushed during the kneading process with the rubber component or the like.
- the average particle size of such a non-reinforcing filler having crushability or crushability may be the average particle size before kneading with a rubber component or the like.
- the non-reinforcing filler in each crosslinked rubber composition usually has an average particle size within the above range (for example, 0.1 to 10 ⁇ m, preferably 0.5 to 5 ⁇ m, more preferably 1 to 3 ⁇ m).
- the average particle size of the non-reinforcing filler can be measured as the volume average particle size using a laser diffraction particle size distribution analyzer.
- the average particle size of the nanometer-sized filler can be calculated as the arithmetic average particle size of an appropriate number of samples (eg, 50 samples) by image analysis of electron micrographs including scanning electron micrographs.
- the ratio of the non-reinforcing filler is, for example, 70 parts by mass or less, preferably 40 parts by mass or less, and more preferably 30 parts by mass or less with respect to 100 parts by mass of the total rubber component.
- the ratio of the non-reinforcing filler is, for example, 3 to 70 parts by mass, preferably 5 to 40 parts by mass, more preferably 10 parts by mass, per 100 parts by mass of the rubber component. It may be up to 30 parts by mass. If the proportion of non-reinforcing filler is too high, the dispersibility of the formulation may be poor.
- the short fibers can be oriented (arranged) in a predetermined direction in the process of preparing an uncrosslinked rubber sheet by rolling a rubber composition kneaded with a Banbury mixer or the like with a roll or calendar.
- the tooth rubber layer forming the tooth portion 3 it is preferable to arrange the orientation direction of the short fibers toward the circumferential direction of the belt.
- the short fibers are oriented along the contour of the tooth portion 3 on the side closer to the tooth cloth 6, and oriented so that the short fibers become substantially parallel to the core wire 4 as they approach the core wire 4. preferable.
- staple fibers include polyolefin fibers (polyethylene fiber, polypropylene fiber, etc.), polyamide fibers (polyamide 6 fiber, polyamide 66 fiber, polyamide 46 fiber, aramid fiber, etc.), polyester fibers [polyalkylene arylate fibers (e.g., , C2-4 alkylene C8-14 arylate fibers such as polyethylene terephthalate (PET) fiber, polytrimethylene terephthalate (PTT) fiber, polybutylene terephthalate (PBT) fiber, polyethylene naphthalate (PEN) fiber); polyarylate fiber, Fully aromatic polyester fiber such as liquid crystal polyester fiber], synthetic fiber such as vinylon fiber, polyvinyl alcohol fiber, polyparaphenylene benzobisoxazole (PBO) fiber; natural fiber such as cotton, hemp, wool, rayon, etc.
- PET polyethylene terephthalate
- PBT polytrimethylene terephthalate
- PEN polyethylene naphthalate
- Fully aromatic polyester fiber such as
- regenerated cellulose fibers cellulose ester fibers, etc.
- inorganic fibers such as carbon fibers and glass fibers.
- These short fibers can be used alone or in combination of two or more.
- fibers having a high modulus such as aramid fiber, PBO fiber, glass fiber and carbon fiber can be preferably used.
- the average fiber diameter of the short fibers is, for example, 1-100 ⁇ m (eg, 3-70 ⁇ m), preferably 5-50 ⁇ m (eg, 7-30 ⁇ m), more preferably 10-25 ⁇ m (especially 12-20 ⁇ m).
- the short fibers have an average fiber length of, for example, 0.3 to 10 mm (eg, 0.5 to 7 mm), preferably 1 to 5 mm (especially 2 to 4 mm).
- the ratio of the short fibers is 10 parts by mass or less, preferably 7 parts by mass or less, more preferably 5 parts by mass or less with respect to 100 parts by mass of the rubber component.
- Cross-linking compounding agent The rubber composition is compounded with a cross-linking agent (vulcanizing agent) for cross-linking the rubber component.
- a cross-linking agent vulcanizing agent
- Accelerators vulcanization accelerators
- cross-linking retarders vulcanization retarders
- the cross-linking compounding agent preferably contains at least a cross-linking agent and a co-cross-linking agent (a cross-linking aid), and a combination of a cross-linking agent and a co-cross-linking agent is particularly preferred.
- a conventional component can be used according to the type of rubber component, and examples thereof include organic peroxides, sulfur-based cross-linking agents, and metal oxides.
- the rubber composition may further contain conventional additives used in the rubber composition of the toothed belt 1 .
- additives include, for example, metal oxides (calcium oxide, barium oxide, iron oxide, copper oxide, titanium oxide, aluminum oxide, etc.), softening agents (oils such as paraffin oil and naphthenic oil, etc.), processing agent or processing aid (stearic acid or its metal salt, wax, paraffin, fatty acid amide, etc.), plasticizer [aliphatic carboxylic acid plasticizer (adipate plasticizer, sebacate plasticizer, etc.), aromatic group carboxylic acid ester plasticizers (phthalate plasticizers, trimellitic ester plasticizers, etc.), oxycarboxylic acid ester plasticizers, phosphate ester plasticizers, ether plasticizers, ether ester plasticizers etc.], anti-aging agents (antioxidants, thermal anti-aging agents, flex crack inhibitors, anti-ozonants, etc.), colorants, tackifiers, plasticizer
- the crosslinked rubber composition used for the tooth portion 3 of the present embodiment has a storage modulus (E') of 200 to 300 MPa at an ambient temperature of 70°C measured according to JIS K6394 (2007).
- the loss factor (Tan ⁇ ) is preferably in the range of 0.1 to 0.2. Within this range, problems such as chipping of teeth are less likely to occur, and deformation of the toothed portion 3 is suppressed, so that engagement with the toothed pulley (drive pulley, driven pulley) is not hindered, and durability is ensured. improve sexuality.
- E' is the elastic modulus obtained from dynamic state testing with periodic oscillations and is defined as the ratio of elastic stress in phase with strain. The higher E' is, the more difficult it is to deform an object, and the amount of deformation is small even under strong external forces such as those under high load conditions, so cracks and cuts are less likely to occur. On the other hand, when E' is low, the object is easily deformed, so even a small external force can easily cut or destroy the object.
- Tan ⁇ is the loss modulus (E′′) divided by E′ and is a measure of the ratio between the energy dissipated as heat and the maximum energy stored during one cycle of oscillation. That is, Tan ⁇ represents the ease with which the vibrational energy applied to the rubber composition is dissipated as heat. As a result, the temperature rises and the heat resistance decreases. On the other hand, the lower the Tan ⁇ , the lower the calorific value, so the heat resistance of the rubber composition is improved.
- the reinforcing layer 5 is formed on the toothed belt 1 (mainly the toothed portion 3) along the shape (approximate outline) of the toothed portion 3 by forming a first rubber layer 33 and a second rubber layer. embedded between the layer 34.
- the position in the belt thickness direction where the reinforcing layer 5 is embedded in the tooth portion 3 is the maximum height H2 from the bottom portion 31 (including the tooth cloth 6) of the tooth portion 3 to the reinforcing layer 5 (hereinafter referred to as the position of the reinforcing layer 5).
- the reinforcing layer 5 includes a plurality of reinforcing fiber filaments 51 arranged in the belt circumferential direction (see FIG. 4). It is 30% or less of the filament 51 .
- the reinforcing layer 5 may not contain any fibers crossing the belt circumferential direction. As a result, substantially the same flexibility as when the reinforcing layer 5 is not provided can be ensured. In other words, deterioration in flexibility of the toothed belt 1 can be suppressed.
- the reinforcing layer 5 has a structure in which reinforcing fiber filaments 51 are arranged in a non-twisted state and bonded to form a sheet while being arranged in the circumferential direction of the belt. Thereby, the thickness of the reinforcing layer 5 can be reduced. Therefore, deterioration in flexibility can be further suppressed.
- "untwisted" means that the number of twists is 1/10 cm or less.
- the reinforcing fiber filaments 51 are embedded in an untwisted state, heat generation due to friction between fibers during bending is less likely to occur.
- the reinforcing layer 5 consists of one or a plurality of laminated unidirectional fiber sheets 50 (UD sheets).
- UD sheets laminated unidirectional fiber sheets 50
- the configuration of each unidirectional fiber sheet 50 is the same, the smaller the number of the unidirectional fiber sheets 50 constituting the reinforcing layer 5, the more the deterioration of the flexibility of the toothed belt 1 can be suppressed.
- the unidirectional fiber sheet 50 has a plurality of reinforcing fiber filaments 51 that are arranged in the circumferential direction of the belt and bonded together in a sheet form.
- the density of the reinforcing fiber filaments 51 in the unidirectional fiber sheet 50 in the belt width direction may be about 1 ⁇ 10 9 to 1 ⁇ 10 11 filaments/5 cm.
- the reinforcing fiber filaments 51 are arranged in an untwisted state. As a result, disturbance of the orientation of the reinforcing fiber filaments 51 can be prevented.
- the reinforcing fiber filaments 51 are bonded together by a thermosetting resin 52 .
- the thermosetting resin 52 is impregnated into the reinforcing fiber filaments 51 .
- the thermosetting resin 52 for example, an epoxy resin, a phenol resin, a melamine resin, a urea resin, a polyurethane resin, a polyimide resin, or the like can be used. Among them, the epoxy resin is preferable.
- the thermosetting resin 52 may be a cured product produced by processing with a resorcin-formalin-latex liquid (RFL liquid) containing a condensate of resorcin and formaldehyde.
- RFL liquid resorcin-formalin-latex liquid
- the RFL treatment is a treatment in which the reinforcing fiber filaments 51 are immersed in the RFL liquid and then heat-treated to adhere the thermosetting resin component in the RFL liquid to the reinforcing fiber filaments 51 .
- the RFL liquid is obtained by mixing an initial condensate of resorcinol and formalin with a latex. be done.
- the reinforcing layer 5 contains only 30% or less of the weight per unit area of the reinforcing fiber filaments 51 in the fibers intersecting in the circumferential direction of the belt. Alternatively, the reinforcing layer may not contain any fibers crossing the circumferential direction of the belt.
- the thickness of the reinforcing layer 5 is 0.05-0.2 mm. Note that the thickness of the reinforcing layer 5 also includes the thickness of the thermosetting resin 52 covering the periphery of the reinforcing fiber filaments 51 . When the thickness of the reinforcing layer 5 exceeds 0.2 mm, bending fatigue resistance may deteriorate due to an increase in bending rigidity (decrease in flexibility). In the present embodiment, by setting the thickness of the reinforcing layer 5 to 0.2 mm or less, it is possible to reliably suppress bending fatigue resistance due to deterioration in flexibility. On the other hand, if the thickness of the reinforcing layer 5 is less than 0.05 mm, it may not be possible to ensure sufficient root crack (tooth chipping) resistance.
- the non-twisted reinforcing fiber filaments 51 are highly effective in improving the resistance to root cracks (tooth chipping). Sufficient tooth root crack (tooth chipping) resistance can be ensured while suppressing a decrease in bending fatigue resistance.
- the “thickness of the reinforcing layer 5 ” refers to the thickness of each reinforcing layer 5 even when there are a plurality of reinforcing layers 5 .
- the basis weight of the unidirectional fiber sheet 50 containing the thermosetting resin 52 is preferably 50 to 400 g/m 2 .
- the basis weight of the unidirectional fiber sheet 50 is less than 50 g/m 2 , the unidirectional fiber sheet 50 constituting the reinforcing layer 5 necessary for ensuring sufficient tooth root crack (tooth chipping) resistance is reduced.
- the basis weight of the unidirectional fiber sheet 50 is preferably 50 g/m 2 or more.
- the basis weight of the unidirectional fiber sheet 50 exceeds 400 g/m 2 , even when the reinforcing layer 5 is composed of one unidirectional fiber sheet 50, the thickness of the reinforcing layer 5 is large. It may become too much and the flexibility may decrease.
- the basis weight of the unidirectional fiber sheet 50 is preferably 400 g/m 2 or less, more preferably 200 g/m 2 or less (especially 100 g/m 2 or less). Thereby, a bendability fall can be suppressed.
- the thickness of the reinforcing fiber filament 51 is not particularly limited, it is, for example, about 0.1 to 50 ⁇ m, preferably about 5 to 25 ⁇ m. If the fiber diameter is too small, handling becomes difficult, and if the fiber diameter is too large, there is a risk of lowering the flexibility of the belt.
- the tensile elastic modulus of the reinforcing fiber filaments 51 contained in the reinforcing layer 5 satisfies the condition that the value of the “index Z”, which is an index value representing the rigidity of the reinforcing layer 5, is 5 or more and 60 or less.
- the thickness is in the range of 0.05 to 0.2 mm, sufficient dedendum crack resistance can be ensured while suppressing a decrease in bending fatigue resistance.
- the tensile elastic modulus of the reinforcing fiber filament 51 is preferably 50 to 300 GPa. If the tensile elastic modulus of the reinforcing fiber filament 51 is less than 50 GPa, it may not be possible to ensure sufficient root crack (tooth chipping) resistance. In order to obtain a sufficient reinforcing effect, the thickness of the reinforcing layer 5 needs to be greater than 0.2 mm, but if the thickness is increased, bending rigidity increases (flexibility decreases), thereby deteriorating bending fatigue resistance.
- the thickness of the reinforcing layer 5 is reduced (0.05 to 0.2 mm) to improve bending fatigue resistance. Sufficient dedendum crack (tooth chipping) resistance can be ensured while suppressing the decrease. Further, if the tensile modulus of the reinforcing fiber filaments 51 is 300 GPa or less, the effect of suppressing the above problems can be ensured, and the life of the toothed belt 1 can be extended.
- the tensile modulus of the reinforcing fiber filament 51 is 100 to 1200 GPa (5 ⁇ index Z ⁇ 60), preferably 200 to 1200 GPa (10 ⁇ index Z ⁇ 60). , more preferably 100 to 300 GPa (more preferably 200 to 300 GPa), considering the upper limit and lower limit (50 to 300 GPa) of the tensile modulus of the reinforcing fiber filament 51 . Further, if the thickness of the reinforcing layer 5 is 0.10 mm, the tensile modulus of the reinforcing fiber filament 51 is 50 to 600 GPa (5 ⁇ index Z ⁇ 60), preferably 100 to 600 GPa (10 ⁇ index Z ⁇ 60).
- the tensile modulus of the reinforcing fiber filament 51 is 25 to 300 GPa (5 ⁇ index Z ⁇ 60), preferably 50 to 300 GPa (10 ⁇ index Z ⁇ 60). is.
- the thermal conductivity of the reinforcing fiber filament 51 is preferably 5.0 W/(m ⁇ K) or more. Although the upper limit of the thermal conductivity of the reinforcing fiber filament 51 is not particularly limited, it may be about 20 W/(m ⁇ K).
- the type of fiber of the reinforcing fiber filament 51 is not particularly limited, and examples thereof include carbon fiber, glass fiber, aramid fiber, polyamide fiber, and polyester fiber. Of these, carbon fibers and aramid fibers are preferred because of their high tensile modulus, and carbon fibers are particularly preferred because of their high tensile modulus and thermal conductivity.
- the type of fibers of the reinforcing fiber filaments 51 forming the unidirectional fiber sheet 50 may be one type or a plurality of types. Specific examples of carbon fibers constituting the unidirectional fiber sheet 50 include "Torayca” manufactured by Toray Industries, Inc., "Tenax” manufactured by Teijin Limited, and “Pyrofil” manufactured by Mitsubishi Chemical Corporation. be.
- a sheet may be produced by bonding aligned carbon fiber filaments with a resin, or a commercially available product may be used.
- commercial products include “Torayca Prepreg” manufactured by Toray Industries, Inc. and “Pyrofil Prepreg” manufactured by Mitsubishi Chemical Corporation.
- Specific examples of aramid fibers constituting the unidirectional fiber sheet 50 include “Kevlar” manufactured by Toray Industries, Inc., “Twaron (registered trademark)” manufactured by Teijin Limited, “Conex”, and “Nomex”. There is.
- a specific example of a commercial product of the unidirectional fiber sheet 50 is "Fibra Sheet” manufactured by Fivex Co., Ltd.
- An adhesive component may be attached to the reinforcing layer 5 by an adhesive treatment for enhancing adhesion with the surrounding rubber layer (tooth portion 3). Adhesion to the rubber layer can be ensured by the thermosetting resin 52 covering the surface of the reinforcing fiber filament 51 without the adhesion treatment. .
- As the adhesion treatment there are the aforementioned RFL treatment and rubber paste treatment (soaking treatment).
- the RFL treatment is a treatment in which the unidirectional fiber sheet 50 is immersed in an RFL liquid and then heat-treated to adhere an adhesive component (resin component including RF condensate) to the unidirectional fiber sheet 50 .
- thermosetting resin 52 is a thermosetting resin component (a resin component containing an RF condensate) generated by treatment with the RFL liquid
- no additional RFL adhesion treatment is required.
- an unvulcanized rubber composition is dissolved in a solvent to form a rubber paste, which is applied to the surface of the unidirectional fiber sheet 50, and then the solvent is evaporated to form the unidirectional fiber sheet 50.
- This is a treatment for forming a film (adhesive component) of an unvulcanized rubber composition on the surface.
- the rubber paste treatment may be performed after the adhesion treatment using the RFL liquid.
- the tooth cloth 6 forming the inner peripheral surface of the belt may be formed of, for example, a woven cloth, a knitted cloth, a nonwoven cloth, or the like. Conventionally, it is often a woven fabric (sailcloth), and is composed of a fabric obtained by weaving warp yarns extending in the width direction of the belt and weft yarns extending in the circumferential direction of the belt.
- the weave structure of the woven fabric is not particularly limited as long as it is a structure in which the warp and weft threads regularly intersect in the vertical and horizontal directions. or a woven structure combining these structures.
- Preferred woven fabrics have twill and satin weaves.
- Examples of the fibers forming the weft and warp of the tooth cloth 6 include, in addition to the fibers similar to the short fibers, polyphenylene ether-based fibers, polyetheretherketone-based fibers, polyethersulfone-based fibers, polyurethane-based fibers, and the like. . These fibers can be used alone or in combination of two or more.
- organic fibers are widely used, and cellulosic fibers such as cotton and rayon, polyester fibers (PET fibers, etc.), polyamide fibers (aliphatic polyamide fibers such as polyamide 66 fibers, aramid fibers, etc.), PBO Fiber, fluororesin fiber [polytetrafluoroethylene (PTFE) fiber, etc.] and the like are preferable.
- these fibers and stretchable elastic yarn for example, stretchable polyurethane-based elastic yarn such as spandex made of polyurethane, stretch-processed (for example, woolly processing, crimping processing, etc.) processed yarn, etc. is also preferred.
- the form of the warp and weft is not particularly limited, and monofilament yarn that is one long fiber, multifilament yarn that is made by arranging or twisting filaments (long fibers), spun yarn that is made by twisting short fibers (spun yarn ) and so on.
- the multifilament yarn or the spun yarn may be a twisted or blended yarn using a plurality of types of fibers.
- the weft preferably contains the elastic yarn having stretchability, and the warp usually does not contain the elastic yarn from the viewpoint of weaving performance.
- the weft yarn containing the elastic yarn extends in the belt circumferential direction
- the warp yarn extends in the belt width direction.
- the average diameter of the fibers (or threads) is, for example, 1-100 ⁇ m (eg, 3-50 ⁇ m), preferably 5-30 ⁇ m, more preferably 7-25 ⁇ m.
- the weft yarn may be, for example, about 100 to 1000 dtex (especially 300 to 700 dtex), and the warp yarn may be, for example, about 50 to 500 dtex (especially 100 to 300 dtex).
- the density of wefts (threads/cm) may be, for example, about 5 to 50 (especially 10 to 30), and the density of warps (threads/cm) is, for example, about 10 to 300 (especially 20 to 100).
- the woven fabric may have a multiple weave structure (such as a double weave structure), and in a weave structure comprising warp and weft, at least a portion of the weft is made of fluororesin-containing fiber (fluororesin such as PTFE). It may be formed of low coefficient of friction fibers (or low friction fibers), such as composite yarns comprising fibers formed of .
- the warp is formed of a polyamide fiber such as nylon 66, polyester fiber, etc.
- the weft is a fiber formed of the fluorine resin alone; the fiber formed of the fluorine resin, polyamide fiber, polyurethane fiber (elastic yarn ); a composite yarn of this composite yarn and a second composite yarn formed of the plurality of second fibers;
- the wefts located (exposed) on the surface side of the tooth cloth 6 (on the side that meshes with the toothed pulley) reduce the friction between the tooth cloth 6 and the toothed pulley.
- fluorine-based fibers for example, PTFE fibers
- fibers other than fluorine-based fibers nylon fibers and urethane elastic threads
- the tooth cloth 6 and the teeth are It becomes possible to increase the adhesive force with the rubber constituting 3.
- the friction between the tooth cloth 6 and the toothed pulley can be reduced, and sound generation can be suppressed.
- low-melting-point fibers having a melting point that melts at the cross-linking (vulcanization) temperature of the rubber-based teeth 3 and back 2 are arranged around the fluorine-based fibers. Specifically, it includes a form in which the fluorine-based fiber and the low-melting-point fiber are twisted together, or the fluorine-based fiber is covered with the low-melting-point fiber.
- the cross-linking (vulcanization) conditions of the tooth portion 3 and the back portion 2 are not particularly limited, and generally the cross-linking (vulcanization) temperature is 100 to 200° C. and the cross-linking (vulcanization) time is 1 minute. ⁇ 5 hours.
- the low-melting-point fibers are melted during the cross-linking (vulcanization) of the tooth portion 3 and the back portion 2, and after flowing between the fibers constituting the tooth cloth 6, the low-melting-point fibers are crystallized by cooling below the melting point. . Therefore, it is possible to prevent the fluorine-based fibers from being cut or scattered due to impact or wear on the surface of the tooth cloth 6 when it is engaged with the toothed pulley or when it is disengaged from the toothed pulley. As a result, it is possible to protect the tooth portion 3 and the back portion 2 for a longer period of time, prevent tooth chipping of the belt, and extend the life of the belt during high-load running.
- the average thickness of the tooth cloth 6 (the tooth cloth 6 in the toothed belt 1) is, for example, 0.1 to 2 mm, preferably 0.2 to 1.5 mm.
- the average thickness of the raw material tooth cloth (tooth cloth before molding) is, for example, 0.5 to 3 mm, preferably 0.75 to 2.5 mm.
- the fabric forming the tooth cloth 6 may be subjected to an adhesive treatment.
- the adhesion treatment includes, for example, a method of immersing the fabric in the RFL treatment solution and then heating and drying; a method of treating the fabric with an epoxy compound or an isocyanate compound; A method of immersing the fabric in paste and then heat-drying; and a method of combining these treatment methods can be exemplified. These methods can be performed singly or in combination, and the order of treatment and the number of treatments are not limited.
- the fabric may be pretreated with an epoxy compound or an isocyanate compound, immersed in the RFL treatment liquid, and dried by heating.
- an uncrosslinked rubber composition is rolled on the back side (adhesion side with the tooth rubber layer) surface of the fabric forming the tooth cloth 6.
- a rubber sheet may be laminated.
- This rubber composition can be appropriately selected from the crosslinked rubber compositions exemplified as the crosslinked rubber composition forming the tooth rubber layer (the first rubber layer 33 and the second rubber layer 34). It may be a conventional adhesive rubber composition.
- the uncrosslinked rubber sheet made of this rubber composition may form a third rubber layer (adhesive rubber layer) interposed between the tooth cloth 6 and the first rubber layer 33 in the toothed belt 1 .
- the fabric subjected to the above adhesion treatment is referred to as a tooth fabric precursor.
- the back portion 2 has the tooth portions 3 and the tooth bottom portions 7 formed on the inner peripheral surface, and has a back rubber layer 21 forming the outer peripheral surface of the belt on the outer peripheral surface side. Further, the back rubber layer 21 is made of a rubber composition (crosslinked rubber composition). In the embodiments of FIGS. 1 to 3, the other surface (belt back surface) on the side where the teeth 3 are not formed is not covered with a fabric (woven fabric, knitted fabric, non-woven fabric, etc.), but it may be covered if necessary. may have been This fabric can be selected from the fabrics exemplified as the tooth fabric 6, including preferred embodiments.
- the hardness of the back portion 2 should be lower than that of the tooth portion 3 in order to reduce the flexural rigidity of the belt and secure the flexibility (windability around the pulley) and bending fatigue resistance.
- the rubber hardness Hs of the crosslinked rubber composition forming the back rubber layer 21 is, for example, 80 to 89 degrees in terms of JIS-A hardness.
- the JIS-A hardness is the surface hardness of the back rubber layer 21 and can be measured using a type A durometer in accordance with JIS K 6253 (2012).
- the rubber composition forming the back portion 2 is not particularly limited as long as it does not impair the adhesion between the back portion 2 and the tooth portion 3.
- Examples thereof include a crosslinked rubber composition for the tooth rubber layer.
- the crosslinked rubber composition can be selected from the crosslinked rubber compositions described above, and can be appropriately adjusted so that the rubber hardness falls within the above range.
- the back portion 2 may be made of a rubber composition different from that of the teeth portion 3, or may be made of the same rubber composition.
- the back portion 2 and the tooth portion 3 often contain the same type of rubber or polymer or the same type of rubber component.
- the rubber component is the same as the second rubber layer 34 (inner rubber layer) because it can improve the adhesion between the back rubber layer 21 and the teeth 3.
- it preferably contains the same kind of rubber component, more preferably the same kind of rubber component.
- the average thickness of the back rubber layer 21 is, for example, 0.3-3 mm, preferably 0.5-2 mm.
- the average thickness of the back portion 2 (the average thickness of the back portion 2 at the tooth bottom portion 7) is, for example, 1 to 5 mm, preferably 1.5 to 4 mm.
- a core wire 4 extending along the belt circumferential direction is embedded in the back portion 2 on the inner peripheral side of the back rubber layer 21 .
- the core wire 4 acts as a tensile member and can improve the running stability and strength of the toothed belt 1 .
- core wires 4 which are twisted cords extending along the belt circumferential direction, are embedded at predetermined intervals in the belt width direction, and a plurality of core wires parallel to the belt circumferential direction are embedded. 4 may be provided, but from the viewpoint of productivity, it is usually embedded in a spiral shape.
- the angle of the core wire 4 with respect to the circumferential direction of the belt may be, for example, 5° or less, and is preferably closer to 0° from the viewpoint of belt running performance.
- the core wires 4 are embedded at predetermined intervals (or pitches) (or at equal intervals) from one end of the belt width direction to the other end of the spine 2.
- the spacing (spinning pitch) which is the distance between the centers of adjacent core wires 4, may be larger than the diameter of the core wires 4, and is, for example, 0.5 to 3.5 mm, preferably 0.5 to 3.5 mm, depending on the diameter of the core wires 4. 0.8 to 3 mm, more preferably 1 to 2.8 mm.
- the core wire 4 may be formed of a twisted cord obtained by twisting a plurality of strands or multifilament yarns.
- twisted cords of strands are preferred, and one strand may be formed by bundling filaments (long fibers).
- the thickness of the filaments forming the twisted cord, the number of converged filaments, the number of strands, and the twist configuration of the twist method are not particularly limited.
- a single-twisted cord, a plied-twisted cord, or a Lang-twisted cord may be used as the twisted cord forming the core wire 4.
- the core wire 4 lang-twisted in which the twist direction of the lower twist and the twist direction of the upper twist are the same, the bending rigidity is lower than that of plied or single-twisted, and excellent bending fatigue resistance is achieved. can get.
- the fibers forming the core wire 4 are not particularly limited, and examples include polyester fibers (polyalkylene arylate fibers, polyparaphenylene naphthalate fibers), polybenzoxazole fibers, acrylic fibers, polyamide fibers (fatty Synthetic fibers such as group polyamide fibers and aramid fibers, inorganic fibers such as glass fibers, carbon fibers and metal fibers (steel fibers) can be exemplified. These fibers can be used alone or in combination of two or more.
- synthetic fibers such as polyester fibers and polyamide fibers, and inorganic fibers such as glass fibers and carbon fibers are widely used because of their low elongation and high strength.
- Carbon fiber multifilament yarns are preferably used in applications where particularly high loads are applied.
- the carbon fiber manufactured by Toray Industries, Inc. under the trade name of "Torayca" is used.
- the carbon fiber multifilament yarn can be selected from 6K, 12K, etc. multifilament yarns with different numbers of filaments.
- 6K represents a multifilament yarn with 6000 filaments and 12K with 12000 filaments.
- a 6K multifilament yarn has a fineness of about 400 tex, and a 12K multifilament yarn has a fineness of about 800 tex.
- the bending fatigue resistance may decrease. Conversely, if the fineness of the carbon fiber multifilament yarn is less than 300 tex, the material cost increases and the number of under-twisted yarns required to produce the core wire 4 having sufficient tensile strength increases. This leads to an increase in man-hours.
- the core wire 4 is a carbon fiber cord (12K-1/0) obtained by single-twisting one 12K multifilament yarn (with a fineness of about 800 tex).
- one 12K multifilament yarn (fineness is about 800 tex) is first twisted to prepare a first twisted yarn, and the four prepared first twisted yarns are combined and upper twisted to create a Lang-twisted carbon fiber cord (12K-1/ 4) may be used as the core wire 4.
- "12K-1/0" is a twisted cord obtained by twisting one 12K multifilament yarn
- "12K-1/4" is a first twisted yarn obtained by twisting one 12K multifilament yarn.
- the core wire 4 may be subjected to an adhesion treatment in order to enhance the adhesiveness between the back rubber layer 21 and the second rubber layer 34 .
- an adhesion treatment for example, a twisted cord is immersed in a resorcin-formalin-latex treatment solution (RFL treatment solution) and then heated and dried to form a uniform adhesive layer on the surface of the twisted cord. good.
- RTL treatment solution resorcin-formalin-latex treatment solution
- the RFL treatment liquid is a mixture in which an initial condensate of resorcinol and formalin is mixed with latex, and the latex is, for example, chloroprene rubber, styrene-butadiene-vinylpyridine terpolymer (VP latex), nitrile rubber, hydrogen It may be nitrile rubber or the like.
- the method of adhesion treatment may be a method of performing pretreatment with an epoxy compound or an isocyanate compound and then treating with the RFL treatment liquid.
- the average diameter (average wire diameter) of the twisted cord (or core wire 4) is, for example, about 0.2 to 2.5 mm. It is 1.0 mm to 2.5 mm, preferably 0.5 to 2.3 mm, more preferably 0.7 to 2.2 mm for applications where a particularly high load is applied, and 0.8 for applications where a particularly high load is applied. ⁇ 2.1 mm is preferred. If the diameter of the core wire is too small, the core wire 4 expands too much, which may cause tooth chipping (loss of the tooth portion 3). If the diameter of the core wire is too large, the bending fatigue resistance of the core wire 4 is lowered, and the core wire may be broken. In addition, in one embodiment of the present specification, the core wire diameter is adjusted to 1.1 mm.
- the toothed belt 1 of this embodiment may be produced by, for example, the following construction method (preforming construction method). First, the unidirectional fiber sheet forming the reinforcing layer 5, the tooth cloth precursor forming the tooth cloth 6, the uncrosslinked rubber sheet forming the first rubber layer 33 (surface rubber layer), the second rubber layer 34 ( An uncrosslinked rubber sheet forming the inner rubber layer) and an uncrosslinked rubber sheet forming the back rubber layer 21 are prepared.
- a tooth cloth 6 is formed in a pressing mold (flat mold) having a plurality of grooves (concave streaks) corresponding to the teeth 3 of the toothed belt 1 in the lower mold.
- a pressing mold flat mold
- an uncrosslinked rubber sheet forming the first rubber layer 33 is laminated on the upper surface of the laminate A to produce a laminate A.
- the laminate A is pressurized with a pressing board provided with projections (ridges) corresponding to each of the plurality of grooves, A predetermined shape is obtained by press-fitting the laminate A into the groove.
- the shape of the projection of the pressing board is adjusted to a shape corresponding to the shape of the reinforcing layer 5 to be provided later and the position H2.
- a unidirectional fiber sheet forming the reinforcing layer 5 is arranged on the upper surface of the laminate A having a predetermined shape so that the fiber filaments are arranged in the circumferential direction of the belt. Then, as shown in FIGS. 6 and 7, the unidirectional fiber sheet is molded along the shape of the laminate A to obtain the laminate B. As shown in FIGS.
- the method of molding is not particularly limited, but as an example, a pinion roll is used to sequentially press grooves aligned in a press mold (flat mold) one tooth at a time. -263432, disclosed in Japanese Patent Laid-Open No. 2005-41165, etc.) can be used.
- the reinforcing fiber filaments 51 are bound together in a sheet form, so that it does not come apart, so it is easy to handle in the preforming process.
- an uncrosslinked rubber sheet forming the second rubber layer 34 is disposed on the upper surface of the laminate B having a predetermined shape, and the temperature is such that the rubber composition softens (for example, , about 70 to 90° C.), the uncrosslinked rubber sheet forming the second rubber layer 34 is pressurized by the upper mold and pressed into the groove to form the tooth portion 3, and the preliminary semi-crosslinked state is formed. A compact is obtained.
- the tooth cloth 6 is stretched along the contour of the tooth portion 3 and arranged on the outermost surface, and the first rubber layer 33 and the reinforcing layer are arranged toward the inner side thereof.
- the preform is wound around a cylindrical mold having a plurality of grooves (recessed lines) corresponding to the teeth 3 and attached (the teeth 3 and the grooves are fitted). combined) and proceed to the next step.
- a twisted cord constituting the core wire 4 is helically wound around the outer peripheral surface of the obtained preform at a predetermined pitch (to have a predetermined pitch in the axial direction of the cylindrical mold). Further, an uncrosslinked rubber sheet forming the back rubber layer 21 is wound around the outer peripheral side to form an uncrosslinked belt molded body (uncrosslinked laminate).
- the non-crosslinked belt molded body is placed on the outer periphery of the cylindrical mold, and the outside thereof is covered with a rubber jacket as a vapor barrier material.
- the jacketed belt molded body and the cylindrical mold are placed inside a cross-linking molding device such as a vulcanizing can.
- a cross-linking molding device such as a vulcanizing can.
- the belt molded body is heated and pressurized inside the cross-linking molding device, the desired shape is formed, and each constituent member is joined by the cross-linking reaction of the uncrosslinked and semi-crosslinked rubber components contained in the belt molded body. are integrally cured to form a sleeve-shaped crosslinked molded body (crosslinked belt sleeve).
- a plurality of toothed belts 1 are obtained by cutting the bridged belt sleeve removed from the cylindrical mold into a predetermined width.
- the two-dimensional finite element method analysis model of the toothed belt consists of a rubber part corresponding to the back rubber layer (A) and the tooth rubber layer (E), a core wire layer 1 (B) corresponding to the core wire and It has a cord layer 2 (C), a reinforcing layer D made of a unidirectional fiber sheet, and a tooth cloth layer F.
- the first rubber layer and the second rubber layer are collectively referred to as a tooth rubber layer (E).
- This model models one tooth of a toothed belt, and the back surface of the belt in the Y direction is constrained in-plane (see FIG. 10).
- truss elements are placed on the neutral plane in the belt thickness direction (core wire layer 1), and the periphery is composed of solid elements (core wire layer 2).
- a tooth shear test was used as a model as a method of applying a load to the contact surface between the teeth of the toothed belt and the toothed pulley. Specifically, as shown in FIGS. 10 and 11, the back surface of the belt is fixed in the plane in the Y direction, and the toothed portion of the toothed belt is attached to a tooth shearing jig (assuming the tooth shape of a toothed pulley). (rigid body) and pulled the center of the cord to displace it.
- the solid element part of the core wire layer 2 (C) is a linear material model, Young's modulus was set to 2000 MPa and Poisson's ratio was set to 0.4.
- tooth rigidity the rigidity of the tooth (hereinafter referred to as tooth rigidity) and evaluated. Furthermore, the stress generated at the tooth root was evaluated by Mises stress.
- the unidirectional fiber elastic modulus means the tensile elastic modulus of reinforcing fiber filaments constituting the unidirectional fiber sheet (reinforcing layer).
- 13(A) is a graph showing the relationship between the ratio of the position H2 of the reinforcing layer to the tooth height H1 [H2/H1 ⁇ 100 (%)] and the tooth rigidity in FIG. FIG.
- FIG. 13B is a graph showing the relationship between the ratio of the reinforcing layer position H2 to the tooth height H1 [H2/H1 ⁇ 100 (%)] and the Mises stress in FIG. 15(A) is a graph showing the relationship between the unidirectional fiber elastic modulus and the tooth stiffness in FIG. 15(B) is a graph showing the relationship between the unidirectional fiber elastic modulus and the Mises stress in FIG.
- Examples 1-3 and Comparative Examples 1-2 FIGS. 12 and 13
- a unidirectional fiber sheet having a unidirectional fiber elastic modulus of 115 GPa was used as a reinforcing layer, and the tooth height was The analysis results and overall judgment results of the maximum value X (N/mm) of tooth rigidity and the maximum value Y (MPa) of Mises stress generated at the tooth root when changing the position H2 of the reinforcing layer with respect to H1 are shown in the figure. 12 and 13.
- H2/H1 of the reinforcing layer position H2 to the tooth height H1 increases, the maximum value X of the tooth rigidity increases and the maximum value Y of the Mises stress generated at the tooth root decreases.
- H2/H1 of 34% or more is rank A, and there is no significant change at 34% or more.
- Example 1 Based on the toothed belt of Example 1 (the unidirectional fiber elastic modulus is 115 GPa, the ratio H2/H1 of the position H2 of the reinforcing layer to the tooth height H1 is 34%), H2/H1 is 34%. 14 and 15 show the analysis results of the maximum value X of the tooth stiffness and the maximum value Y of the Mises stress generated at the tooth root when the unidirectional fiber elastic modulus is changed while keeping constant at .
- the overall judgment was A rank.
- HNBR Nippon Zeon Co., Ltd.
- Zetpol2010 iodine value 11 mg / 100 mg HNBR containing unsaturated carboxylic acid metal salt: "Zeoforte ZSC2295CX” manufactured by Nippon Zeon Co., Ltd.
- Aramid short fibers "Conex” manufactured by Teijin Limited, average fiber length 3 mm, average fiber diameter 14 ⁇ m
- Stearic acid "Tsubaki Stearate” manufactured by NOF Corporation
- Carbon black SRF “Seist S” manufactured by Tokai Carbon Co., Ltd., average particle size 66 nm, iodine adsorption amount 26 mg / g Silica: "Ultrasil VN-3" manufactured by Evonik Degussa Japan Co., Ltd.,
- Unidirectional fiber sheet 1 Toray Industries, Inc. “Torayca T700S” carbon fiber filaments (tensile modulus 230 GPa, filament diameter 7 ⁇ m, density 1.80 g/cm 3 ) are used and bonded with an epoxy resin to obtain three levels of Sheets having a thickness of 0.05 mm (a basis weight of 60 g/m 2 ), 0.10 mm (a basis weight of 120 g/m 2 ), and 0.20 mm (a basis weight of 240 g/m 2 ) were prepared.
- 0.05 mm a basis weight of 60 g/m 2
- 0.10 mm a basis weight of 120 g/m 2
- 0.20 mm a basis weight of 240 g/m 2
- Unidirectional fiber sheet 2 Teijin Limited "Tenax IMS60" carbon fiber filaments (tensile modulus 290 GPa, filament diameter 6 ⁇ m, density 1.73 g/cm 3 ) are used and bound with epoxy resin to form a sheet having a thickness of 0.005 mm. A sheet of 10 mm (basis weight: 120 g/m 2 ) was prepared. Unidirectional fiber sheet 3: Toray Co., Ltd.
- Kevlar 49 aramid fiber filaments (tensile modulus 112 GPa, filament diameter 12 ⁇ m, density 1.45 g/cm 3 ) are used, bonded with epoxy resin, and three levels of Sheets having a thickness of 0.05 mm (basis weight: 50 g/m 2 ), 0.10 mm (basis weight: 100 g/m 2 ), and 0.20 mm (basis weight: 200 g/m 2 ) were prepared.
- Unidirectional fiber sheet 4 Toray Co., Ltd.
- aramid fiber filaments tensile modulus 54.7 GPa, filament diameter 12 ⁇ m, density 1.44 g/cm 3
- 3 Sheets having a standard thickness of 0.05 mm (basis weight: 50 g/m 2 ), 0.10 mm (basis weight: 100 g/m 2 ), and 0.20 mm (basis weight: 200 g/m 2 ) were prepared.
- Sudare sheet 1 A sheet (commonly known as a sudare cord) in which unidirectionally oriented aramid fiber twisted cords (1670 dtex/1 ⁇ 2) are connected with fine cotton yarn (count 20S/1).
- the density of the twisted cord was 50/5 cm, the density of the fine yarn was 4/5 cm, and the thickness of the sheet was 0.7 mm.
- Sudare sheet 2 A sheet (commonly known as a sudare cord) in which unidirectionally oriented PET fiber twisted cords (1100 dtex/1 ⁇ 2) are connected with fine cotton threads (count 20S/1). The density of the twisted cord was 50/5 cm, the density of the fine yarn was 4/5 cm, and the thickness of the sheet was 0.6 mm.
- Carbon fiber cord (12K-1/0, tensile modulus 230GPa) made by twisting one 12K multifilament yarn [“Torayca T700SC-12000” manufactured by Toray Industries, Inc., single filament fineness 0.67dtex, total fineness 800tex] , and subjected to adhesion treatment with an HNBR-based overcoat treatment agent to obtain a cord with a cord diameter of 1.1 mm.
- the woven fabric shown in Table 2 was immersed in the RFL treatment liquid and rubber cement to prepare a tooth fabric precursor.
- RFL treatment two types of RFL treatment solutions (RFL1 and RFL2) shown in Table 3 were used, and immersion treatment was performed in order of RFL1 and RFL2.
- rubber paste treatment two types of rubber paste (rubber paste 1 and rubber paste 2) shown in Table 4 were used, and rubber paste 1 and rubber paste 2 were dipped in order.
- each rubber composition having the formulation shown in Table 1 was kneaded using a Banbury mixer. Then, the obtained kneaded rubber was rolled to a predetermined thickness with a calender roll to prepare an uncrosslinked rubber sheet.
- the short aramid fibers contained in the uncrosslinked rubber sheet were oriented in the rolling direction.
- the preform was wound around a cylindrical mold and mounted (the teeth and the grooves were fitted), and the twisted cord constituting the cord was helically spun (tensioned) on the outer peripheral surface of the preform. : 150 to 250 N/thread, spinning pitch: 1.25 mm, spinning speed: 1.5 m/s). Further, an uncrosslinked rubber sheet (rubber composition B) forming a back rubber layer was wound around the outer peripheral side to form an uncrosslinked belt molded body (uncrosslinked laminate).
- cross-linking molding was performed for 40 minutes under the conditions of a heating temperature of 179°C and a steam pressure of 0.83 MPa to produce a cross-linked molded body (cross-linked belt sleeve).
- a toothed belt was obtained by cutting the crosslinked belt sleeve removed from the cylindrical mold into a width of 20 mm.
- the reinforcing layer 5 is arranged so that the direction in which the fiber filaments contained in the unidirectional fiber sheet are arranged is in the longitudinal direction of the belt, and the position H2 in the belt thickness direction in each example is the position shown in Table 5. .
- Example D Regarding the unidirectional fiber sheet 1 forming the reinforcing layer 5, the basis weight was 60 g/m 2 (thickness 0.05 mm) in Example D, and the basis weight was 240 g/m 2 (thickness 0.20 mm) in Example E.
- a toothed belt was produced in the same manner as in Example B, except that it was changed to
- Example F A toothed belt was produced in the same manner as in Example C, except that the basis weight of the unidirectional fiber sheet 1 forming the reinforcing layer 5 was changed to 60 g/m 2 (thickness: 0.05 mm).
- Example G Except that the unidirectional fiber sheet forming the reinforcing layer 5 was changed to the unidirectional fiber sheet 2 having a different unidirectional fiber elastic modulus (weight per unit area: 120 g/m 2 , thickness: 0.10 mm). A toothed belt was produced in the same manner as B.
- Example H the unidirectional fiber sheet forming the reinforcing layer 5 was changed to the unidirectional fiber sheet 3 (basis weight: 100 g/m 2 , thickness: 0.10 mm) having a different unidirectional fiber elastic modulus.
- a toothed belt was produced in the same manner as in Example B except for the above.
- Example J the basis weight of the unidirectional fiber sheet 3 forming the reinforcing layer 5 was 50 g/m 2 (thickness: 0.05 mm), and in Example K, the basis weight was 200 g/m 2 (thickness: 0.20 mm). ), a toothed belt was produced in the same manner as in Example H.
- Example L the unidirectional fiber sheet forming the reinforcing layer 5 was changed to a unidirectional fiber sheet 4 having a different unidirectional fiber elastic modulus (basis weight: 100 g/m 2 , thickness: 0.10 mm).
- a toothed belt was produced in the same manner as in Example B except for the above.
- the basis weight of the unidirectional fiber sheet 4 forming the reinforcing layer 5 was set to 50 g/m 2 (thickness: 0.05 mm), and in Example M, the basis weight was set to 200 g/m 2 (thickness: 0.20 mm).
- a toothed belt was produced in the same manner as in Example L, except for the changes.
- Comparative Examples F and G In Comparative Example F, a toothed belt was produced in the same manner as in Example B, except that the unidirectional fiber sheet forming the reinforcing layer 5 was changed to the blind sheet 1 (thickness: 0.70 mm). In Comparative Example G, a toothed belt was produced in the same manner as in Example B, except that the unidirectional fiber sheet forming the reinforcing layer 5 was changed to the blind sheet 2 (thickness: 0.60 mm).
- a preform was produced by a method that does not use a unidirectional fiber sheet in the preforming method described in this embodiment. Specifically, a tooth cloth precursor forming a tooth cloth, a tooth rubber layer (a first rubber layer and a second rubber Laminated in order of uncrosslinked rubber sheets (rubber composition A, sheet thickness 2.3 mm) forming a layer), and pressed under the conditions of a temperature of 90 ° C. and a press pressure (surface pressure) of 20.2 MPa to prepare a semi-crosslinked state. A molded body was produced. After that, the toothed belt was produced in the same manner as in other examples and comparative examples.
- the inclination K2 obtained by measuring in the same manner by excluding the portion that engages with the tooth shearing jig is regarded as a numerical value due to the elastic elongation of the belt. did. Then, the value of K calculated from K1 and K2 was used as an index representing the rigidity of the tooth portion ( tooth rigidity) according to the relationship of the following formula ( 1 ).
- the tooth rigidity of the toothed belt was evaluated and classified into ranks A to C based on the following criteria. Grades with excellent tooth rigidity (deformation resistance) are ranked in the order of C rank, B rank, and A rank, but it was judged that the level of A rank or B rank shows the practical effect of the reinforcing layer remarkably. .
- a rank: K value (relative value) is 1.7 or more
- B rank: K value (relative value) is 1.5 or more and less than 1.7
- Example F which corresponds to an example in which the thickness of the reinforcing layer is further reduced compared to Example C and an example in which the ratio of H2/H1 is increased compared to Example D, the tooth rigidity (K value) is Got an A rank.
- Example I in which the reinforcing layer of Example H was arranged at a position where H2/H1 ⁇ 100 was 100%, the tooth rigidity (K value) was ranked A.
- Comparative Example D in which the arrangement of the reinforcing layer was changed to a position where H2/H1 ⁇ 100 was 100%, was further deficient in tooth rigidity (K value), resulting in a C rank.
- the thickness of the blind sheet of Comparative Example F was 0.7 mm
- the thickness of the blind sheet of Comparative Example G was 0.6 mm.
- the blind sheet was arranged so that the twisted cords constituting the belt were oriented in the longitudinal direction of the belt.
- these bamboo blind sheets were thicker than the unidirectional fiber sheet used in this example, they lacked tooth rigidity (K value) and were ranked C.
Abstract
Description
前記補強層は前記補強繊維フィラメントが、無撚の状態で、前記ベルト周方向に配列しつつシート状になるように結合された構造をしており、
前記補強層の厚みは、0.05~0.2mmであり、
前記補強繊維フィラメントの引張弾性率(GPa)は、
5≦[前記補強層の厚み(mm)]×[前記補強繊維フィラメントの引張弾性率(GPa)]≦60
の条件を満たすことを特徴としている。
また、補強層は、ベルト周方向に交差する繊維を、補強繊維フィラメントの単位面積当たりの重量の30%以下しか含まない。そのため、補強層を設けない場合とほぼ同じ屈曲性を確保できる。つまり、歯付ベルトの屈曲性の低下を抑えることができる。また、補強繊維フィラメントが無撚の状態で埋設されることにより、補強層の厚みを薄くすることができる。これにより、屈曲性の低下をより抑えることができる。なお、本発明において、「無撚」とは、撚り数が1回/10cm以下であることを意味する。また、補強繊維フィラメントが無撚の状態で埋設されるため、屈曲時に繊維同士の摩擦による発熱が生じにくい。また、屈曲性の低下を抑えたことで、歯付ベルトがプーリに巻きかかったり離れたりする際の屈曲による歯付ベルトの発熱を抑制できる。そのため、走行中の歯付ベルトの温度上昇を抑制できる。歯付ベルトの温度上昇を抑制したことで歯付ベルトをより長寿命化できる。
また、補強層の厚みは、0.05~0.2mmである。補強層の厚みが0.2mmを超えると、曲げ剛性の増加(屈曲性の低下)によって、耐屈曲疲労性が悪化する場合がある。本発明では、補強層の厚みを0.2mm以下とすることで、屈曲性の低下による耐屈曲疲労性を確実に抑制できる。一方、補強層の厚みが0.05mm未満であると、十分な耐歯元亀裂(歯欠け)性を確保できない場合がある。本発明では、無撚の補強繊維フィラメントによる耐歯元亀裂(歯欠け)性を向上させる効果が高いため、補強層が0.05~0.2mmという薄さであっても、耐屈曲疲労性の低下を抑制しつつ、十分な耐歯元亀裂(歯欠け)性を確保することができる。なお、本発明において、「補強層の厚み」とは、補強層が複数ある場合であっても、各補強層の厚みのことを指す。
また、補強層に含まれる補強繊維フィラメントの引張弾性率(GPa)は、補強層の剛性を表す指標値である、『[前記補強層の厚み(mm)]×[前記補強繊維フィラメントの引張弾性率(GPa)]』の値(指数Z)が5以上60以下の条件を満たすことにより、補強層の厚みが0.05~0.2mmの範囲で、耐屈曲疲労性の低下を抑制しつつ、十分な耐歯元亀裂性を確保することができる。
また、補強繊維フィラメントはシート状になるように結合されており、ばらけることがないため、歯付ベルト製造時に、補強層の取り扱いが容易である。具体的には、未加硫ゴムの上に補強層となるシートを巻き付ける作業や、補強層にRFL処理やゴム糊処理等の接着処理を施す作業を容易に行うことができる。
また、補強繊維フィラメントの引張弾性率が300GPa以下であれば、上記の不具合の抑制効果を確保することができ、歯付ベルトをより長寿命化できる。
本実施形態の歯付ベルト1は、無端状のかみ合い伝動ベルトであり、図1~図3に示すように、心線4がベルト周方向(ベルト長手方向)に延びて埋設された背部2と、背部2の内周面に沿って所定間隔で配設された、複数の歯部3と、を備えている。
歯部3は、表面が歯布6で構成されており、歯部3の輪郭に沿って、歯布6と接する側に配置される第1ゴム層33と、第1ゴム層33のベルト外周面側に配置される補強層5と、補強層5のベルト外周面側に配置される第2ゴム層34とを含む。第1ゴム層33と第2ゴム層34は、異なるゴム組成物で形成してもよく、同じゴム組成物で形成してもよい。
(A)ゴム成分
歯部3(歯ゴム層)を構成するゴム組成物(架橋ゴム組成物)のゴム成分としては、例えば、ジエン系ゴム[天然ゴム、イソプレンゴム、ブタジエンゴム、クロロプレンゴム、ブチルゴム、スチレン-ブタジエンゴム(SBR)、ビニルピリジン-スチレン-ブタジエンゴム、アクリロニトリル-ブタジエンゴム(ニトリルゴム:NBR)、アクリロニトリル-クロロプレンゴム、水素化ニトリルゴム(HNBR)など]、エチレン-α-オレフィンエラストマー[エチレン-プロピレン共重合体(EPM)、エチレン-プロピレン-ジエン三元共重合体(EPDM)など]、クロロスルホン化ポリエチレンゴム(CSM)、アルキル化クロロスルホン化ポリエチレンゴム(ACSM)、エピクロルヒドリンゴム、アクリル系ゴム、シリコーンゴム、ウレタンゴム、フッ素ゴムなどが例示できる。これらのゴム成分は、カルボキシル化SBR、カルボキシル化NBRなどのように、カルボキシル化されていてもよい。これらのゴム成分は、単独でまたは二種以上組み合わせて使用できる。
特に好ましいゴム成分は、水素化ニトリルゴム(HNBR)であり、クロロプレンゴム、エチレン-プロピレン-ジエン三元共重合体(EPDM)も好適に用いられる。特に高い負荷が作用する用途での好ましいゴム成分は、耐熱老化性の高いゴム、特に、水素化ニトリルゴムである。ゴム成分中、上記好ましいゴム成分の割合は、50質量%以上(例えば80~100質量%程度)が好ましく、特に100質量%であるのが好ましい。水素化ニトリルゴムの水添率は、50~100%程度の範囲から選択でき、70~100%であってもよい。
また、架橋ゴム組成物は、充填系配合剤をさらに含んでいてもよい。充填系配合剤としては、補強性充填剤、非補強性充填剤、短繊維などが例示できる。
非補強性充填剤の割合は、ゴム成分の総量100質量部に対して、例えば70質量部以下、好ましくは40質量部以下、さらに好ましくは30質量部以下である。必要に応じて非補強性充填剤を用いる場合、非補強性充填剤の割合は、ゴム成分100質量部に対して、例えば3~70質量部、好ましくは5~40質量部、さらに好ましくは10~30質量部であってもよい。非補強性充填剤の割合が多すぎると、配合剤の分散性が不良となる虞がある。
ゴム組成物は、ゴム成分を架橋させるための架橋剤(加硫剤)が配合され、必要に応じて、共架橋剤、架橋助剤(加硫助剤)、架橋促進剤(加硫促進剤)、架橋遅延剤(加硫遅延剤)などが配合される。これらのうち、架橋系配合剤は、少なくとも架橋剤および共架橋剤(架橋助剤)を含むのが好ましく、架橋剤と共架橋剤との組み合わせが特に好ましい。
架橋剤としては、ゴム成分の種類に応じて慣用の成分が使用でき、例えば、有機過酸化物、硫黄系架橋剤、金属酸化物などが例示できる。
ゴム組成物は、歯付ベルト1のゴム組成物に使用される慣用の添加剤をさらに含んでいてもよい。慣用の添加剤としては、例えば、金属酸化物(酸化カルシウム、酸化バリウム、酸化鉄、酸化銅、酸化チタン、酸化アルミニウムなど)、軟化剤(パラフィンオイルやナフテン系オイルなどのオイル類など)、加工剤または加工助剤(ステアリン酸またはその金属塩、ワックス、パラフィン、脂肪酸アマイドなど)、可塑剤[脂肪族カルボン酸系可塑剤(アジピン酸エステル系可塑剤、セバシン酸エステル系可塑剤など)、芳香族カルボン酸エステル系可塑剤(フタル酸エステル系可塑剤、トリメリット酸エステル系可塑剤など)、オキシカルボン酸エステル系可塑剤、リン酸エステル系可塑剤、エーテル系可塑剤、エーテルエステル系可塑剤など]、老化防止剤(酸化防止剤、熱老化防止剤、屈曲き裂防止剤、オゾン劣化防止剤など)、着色剤、粘着付与剤、可塑剤、カップリング剤(シランカップリング剤など)、安定剤(紫外線吸収剤、熱安定剤など)、難燃剤、帯電防止剤などが挙げられる。また、ゴム組成物は、必要により、接着性改善剤(レゾルシン-ホルムアルデヒド共縮合物、アミノ樹脂など)を含んでいてもよい。これらの添加剤は、単独でまたは二種以上組み合わせて使用できる。
Tanδとは、損失弾性率(E´´)をE´で除したものであり、振動1サイクルの間に熱として散逸されるエネルギーと貯蔵される最大エネルギーとの比の尺度となっている。即ち、Tanδはゴム組成物に加えられる振動エネルギーが熱として散逸され易さを表すものであり、Tanδが大きくなるほど外部から加えられるエネルギーの多くが熱に変換されるため、ゴム組成物は自己発熱により温度が高くなり、耐熱性が低下する。一方、Tanδが低いほど発熱量は低く抑えられるため、ゴム組成物の耐熱性は向上する。
補強層5は、図1~図3に示すように、歯付ベルト1(主に歯部3)に、歯部3の形状(略輪郭)に沿って、第1ゴム層33と第2ゴム層34との間に埋設されている。この補強層5が歯部3に埋設されるベルト厚み方向の位置は、歯部3の底部31(歯布6を含む)から補強層5までの最大高さH2(以下、補強層5の位置H2)が、歯部3の底部31から歯先32(歯布6を含む)までの高さH1(以下、歯高さH1)の30~100%(H2/H1=0.3~1.0)の領域であればよく、50~100%(H2/H1=0.5~1.0)の領域であれば、より好ましい。補強層5の位置H2が小さすぎると(補強層5の位置H2が心線4に近すぎると)、曲げ剛性が大きくなりすぎる。前記所定の領域に調整することにより、背反関係にある歯付ベルト1の歯剛性と曲げ剛性とのバランスを好適に調整でき、屈曲性を確保しつつ、十分な耐歯元亀裂(歯欠け)性を確保できる。
なお、補強層5の位置H2が、歯高さH1の100%(H2/H1=1.0)の場合は、補強層5が歯布6と接する態様となる。すなわち、歯ゴム層が第2ゴム層34のみで、第1ゴム層33が存在しない態様となる。
RFL液は、レゾルシンとホルマリンとの初期縮合物をラテックスに混合したものであり、ラテックスとしてはスチレン・ブタジエン・ビニルピリジン三元共重合体、水素化ニトリルゴム、クロロスルフォン化ポリエチレン、エピクロルヒドリンなどが用いられる。
また、補強繊維フィラメント51の引張弾性率が300GPa以下であれば、上記の不具合の抑制効果を確保することができ、歯付ベルト1をより長寿命化できる。
また、補強層5の厚みが0.10mmであれば、補強繊維フィラメント51の引張弾性率は、50~600GPa(5≦指数Z≦60)、好ましくは100~600GPa(10≦指数Z≦60)、より好ましくは、補強繊維フィラメント51の引張弾性率の上限値及び下限値(50~300GPa)を踏まえて50~300GPa(更に好ましくは100~300GPa)である。
また、補強層5の厚みが0.20mmであれば、補強繊維フィラメント51の引張弾性率は、25~300GPa(5≦指数Z≦60)、好ましくは50~300GPa(10≦指数Z≦60)である。
一方向性繊維シート50を構成するアラミド繊維の具体例としては、例えば、東レ(株)製の「ケブラー」、帝人(株)製の「トワロン(登録商標)」、「コーネックス」、「ノーメックス」がある。一方向性繊維シート50の市販品の具体例としては、ファイベックス(株)製の「フィブラシート」がある。
ベルト内周面(歯部3および歯底部7の表面)を構成する歯布6は、例えば、織布、編布、不織布などの布帛などで形成してもよい。慣用的には織布(帆布)である場合が多く、ベルト幅方向に延在する経糸とベルト周方向に延在する緯糸とを織成してなる織物で構成される。織布の織り組織は、経糸と緯糸とが規則的に縦横方向に交差した組織であれば特に制限されず、平織、綾織(または斜文織)、朱子織(繻子織、サテン)などのいずれであってもよく、これらの組織を組み合わせた織り組織であってもよい。好ましい織布は、綾織および朱子織組織を有している。
この態様においては、緯糸のうちの、歯布6の表面側(歯付プーリとのかみ合い側)に位置する(露出する)緯糸として、歯布6と歯付プーリとの間の摩擦を低減するために、摩擦係数が低いフッ素系繊維(例えば、PTFE繊維)を使用することが好ましい。一方、歯布6の裏面側(歯ゴム層との接着側)に位置する緯糸には、フッ素系繊維以外の繊維(ナイロン繊維やウレタン弾性糸)を使用することで、歯布6と歯部3を構成するゴムとの接着力を高めることが可能となる。この態様の歯布6では、歯布6と歯付プーリとのかみ合いでの摩擦を低減でき、発音を抑制できる。
背部2は、内周面において歯部3および歯底部7が形成されるとともに、その外周面側では、ベルト外周面を形成する背ゴム層21を有している。さらに、背ゴム層21は、ゴム組成物(架橋ゴム組成物)で形成されている。図1~図3の態様では、歯部3が形成されていない側の他方の表面(ベルト背面)は布帛(織布、編布、不織布等)で被覆されていないが、必要に応じて被覆されていてもよい。この布帛は、好ましい態様も含めて、歯布6として例示された布帛から選択できる。
特に、背ゴム層21を構成する架橋ゴム組成物において、ゴム成分は、背ゴム層21と歯部3との密着性を向上できる点から、第2ゴム層34(内部ゴム層)と同系列または同種のゴム成分を含むのが好ましく、同種のゴム成分であるのがさらに好ましい。
背部2には、背ゴム層21の内周側において、ベルト周方向に沿って延びる心線4が埋設されている。この心線4は、抗張体として作用し、歯付ベルト1の走行の安定性及び強度を向上できる。さらに、背部2では、通常、ベルト周方向に沿って延びる撚りコードである心線4が、ベルト幅方向に所定の間隔を空けて埋設されており、ベルト周方向に平行な複数本の心線4が配設されていてもよいが、生産性の点から、通常、螺旋状に埋設されている。螺旋状に配設する場合、ベルト周方向に対する心線4の角度は、例えば5°以下であってもよく、ベルト走行性の点から、0°に近いほど好ましい。
特に高い負荷が作用する用途では、炭素繊維のマルチフィラメント糸が好適に用いられる。炭素繊維は、例えば、東レ株式会社製、商品名「トレカ」等が用いられる。
本実施形態の歯付ベルト1は、例えば、以下の工法(予備成形工法)で作製してもよい。
まず、補強層5を形成する一方向性繊維シート、歯布6を形成する歯布前駆体、第1ゴム層33(表部ゴム層)を形成する未架橋ゴムシート、第2ゴム層34(内部ゴム層)を形成する未架橋ゴムシート、背ゴム層21を形成する未架橋ゴムシートを作製する。
次に、図5に示すように、下型に歯付ベルト1の歯部3に対応する複数の溝部(凹条)を有するプレス用金型(平型)に、歯布6を形成する歯布前駆体を敷設する。続いて、その上面に第1ゴム層33を形成する未架橋ゴムシートを積層して積層体Aを作製する。そして、ゴム組成物が軟化する程度の温度(例えば、70~90℃程度)に加熱しつつ、複数の溝部ごとに対応した突起(凸条)を備えた押さえ盤で積層体Aを加圧し、積層体Aを溝部内に圧入して所定形状を得る。このとき、押さえ盤の突起の形状は、後で配設する補強層5の形状や位置H2に対応した形状に調整されている。
得られた予備成形体の外周面に、心線4を構成する撚りコードを螺旋状に所定のピッチで(円筒状モールドの軸方向に所定のピッチを有するように)巻き付ける。さらにその外周側に、背ゴム層21を形成する未架橋ゴムシートを巻き付けて未架橋のベルト成形体(未架橋積層体)を形成する。
最後に、円筒状モールドから脱型した架橋ベルトスリーブを所定の幅に切断することにより、複数の歯付ベルト1が得られる。
実施例1~5、比較例1~2、参考例1~2では、全厚(t)5.6mm、歯高さH1(歯布含む)3.5mm、歯ピッチ(P)8mm、歯型G8Mの歯付ベルトを用いて、歯せん断試験を模擬した2次元モデルを作成し、歯付ベルトの歯部と歯付プーリとの接触面にかかる荷重を与えた場合に、歯元に生じる応力を有限要素法解析によって、比較検証した。
そして、心線層のモデルは、ベルト厚み方向における中立面にトラス要素を配置し(心線層1)、周囲をソリッド要素で構成した(心線層2)。
また、心線層1(B)のトラス要素部は線形材料モデルであり、ヤング率=27000MPa、ポアソン比=0.4、心線層2(C)のソリッド要素部は線形材料モデルであり、ヤング率=2000MPa、ポアソン比=0.4に設定した。
補強層Dは線形材料モデルであり、ヤング率は変量し、ポアソン比=0.4に設定した。
また、補強層Dの厚み=0.1mmと設定した。
補強層Dの配置はモデル上で変量した。
以下に示す実施例及び比較例として検証した種々の歯付ベルトに関して、2次元の有限要素モデルを作成して解析を行い、歯剛性の最大値Xと、歯元に発生するMises応力の最大値Yを算出した。歯剛性の最大値Xは大きい方が優れており、Mises応力の最大値Yは、小さい方が優れている。以下の基準に基づいて優劣を判定した。
A判定:100N/mm以上
B判定:62N/mm以上、100N/mm未満
C判定:62N/mm未満
A判定:15.0MPa未満
B判定:15.0MPa以上、22.0MPa未満
C判定:22.0MPa以上
比較検証した実施例及び比較例の歯付ベルトについて、各ベルトの仕様と、有限要素法解析によって算出した歯剛性の最大値X、及び、歯元に発生するMises応力値の最大値Yとを、総合判定結果とともに図12及び図14に示す。なお、図12及び図14において、各ベルトの仕様につき、歯部における補強層の位置を、歯高さH1に対する補強層の位置H2の割合[H2/H1×100(%)]で示した(図9参照)。さらに、一方向性繊維弾性率(GPa)、歯剛性の最大値X(N/mm)、歯元に発生するMises応力の分布図、歯元に発生するMises応力の値の最大値Y(MPa)を示した。一方向性繊維弾性率とは、一方向性繊維シート(補強層)を構成する補強繊維フィラメントの引張弾性率を意味する。
また、図13(A)では、図12における、歯高さH1に対する補強層の位置H2の割合[H2/H1×100(%)]と歯剛性との関係性をグラフ化したものである。また、図13(B)では、図12における、歯高さH1に対する補強層の位置H2の割合[H2/H1×100(%)]とMises応力との関係性をグラフ化したものである。また、図15(A)では、図14における、一方向性繊維弾性率と歯剛性との関係性をグラフ化したものである。また、図15(B)では、図14における、一方向性繊維弾性率とMises応力との関係性をグラフ化したものである。
図12(及び図13)、図14(及び図15)に示す総合判定では、以下の基準に基づいてAランク~Cランクに分類した。
Aランク:X,Yが共にA判定である場合
Bランク:X,Yの一方又は両方がB判定である場合(C判定ではない)
Cランク:X,Yが一方でもC判定である場合
実施例1~3及び比較例1~2について、歯ピッチ=8.0mm、歯型G8Mの歯付ベルトにおいて、一方向性繊維弾性率115GPaの一方向性繊維シートを補強層として、歯高さH1に対する補強層の位置H2を変化させたときの歯剛性の最大値X(N/mm)、及び、歯元に発生するMises応力の最大値Y(MPa)の解析結果及び総合判定結果を図12及び図13に示した。
歯高さH1に対する補強層の位置H2の割合H2/H1が34%(1.2/3.5≒0.34)の歯付ベルト(実施例1)では、歯剛性は最大値X=133N/mm、歯元に発生するMises応力は最大値Y=12.5MPaで、いずれもA判定で、総合判定がAランクとなった。
歯高さH1に対する補強層の位置H2の割合H2/H1が63%(2.2/3.5≒0.63)の歯付ベルト(実施例2)では、歯剛性は最大値X=140N/mm、歯元に発生するMises応力は最大値Y=11.0MPaで、いずれもA判定で、総合判定がAランクとなった。
歯高さH1に対する補強層の位置H2の割合H2/H1が91%(3.2/3.5≒0.91)の歯付ベルト(実施例3)では、歯剛性は最大値X=137N/mm、歯元に発生するMises応力は最大値Y=10.9MPaで、いずれもA判定で、総合判定がAランクとなった。
実施例1の歯付ベルト(一方向性繊維弾性率が115GPa、歯高さH1に対する補強層の位置H2の割合H2/H1が34%)を基準(ベース)にして、H2/H1を34%で一定にしたまま、一方向性繊維弾性率を変化させた場合の歯剛性の最大値X、及び歯元に発生するMises応力の最大値Yの解析結果を図14及び図15に示した。
一方向性繊維弾性率が5GPaの歯付ベルト(参考例2)では、歯剛性は最大値X=79N/mm、歯元に発生するMises応力は最大値Y=20.7MPaで、いずれもB判定で、総合判定がBランクとなった。
一方向性繊維弾性率が50GPaの歯付ベルト(実施例4)では、歯剛性は最大値X=118N/mm、歯元に発生するMises応力は最大値Y=13.7MPaで、いずれもA判定で、総合判定がAランクとなった。
実施例1よりも一方向性繊維弾性率が大きい歯付ベルト(230GPa:実施例5)では、歯剛性は最大値X=140N/mm、歯元に発生するMises応力は最大値Y=12.5MPaで、いずれもA判定で、総合判定がAランクとなった。
実施例A~Mおよび比較例A~Gでは、下記表1~8に示す材料・構成に基づき作製した各歯付ベルトから試験片(幅20mm、長さ196mm)を採取し、歯剛性試験を行い、各歯付ベルトの歯剛性を比較評価した。
HNBR:日本ゼオン(株)製「Zetpol2010」、ヨウ素価11mg/100mg
不飽和カルボン酸金属塩を含むHNBR:日本ゼオン(株)製「Zeoforte ZSC2295CX」、ベースHNBR:不飽和カルボン酸金属塩(質量比)=100:110、ベースHNBRのヨウ素価28mg/100mg アラミド短繊維:帝人(株)製「コーネックス」、平均繊維長3mm、平均繊維径14μm
ステアリン酸:日油(株)製「ステアリン酸つばき」
カーボンブラックSRF:東海カーボン(株)製「シーストS」、平均粒子径66nm、ヨウ素吸着量26mg/g
シリカ:エボニック・デグサ・ジャパン(株)製「ウルトラシルVN-3」、比表面積155~195m2/g
炭酸カルシウム:丸尾カルシウム(株)製「スーパー#1500」、平均粒子径1.5μm
酸化亜鉛:堺化学工業(株)製「酸化亜鉛2種」、平均粒子径0.55μm
老化防止剤:p,p'-ジオクチルジフェニルアミン、精工化学(株)製「ノンフレックスOD3」
有機過酸化物:1,3-ビス(t-ブチルパーオキシイソプロピル)ベンゼン、理論活性酸素量9.45%
共架橋剤:N,N'-m-フェニレンジマレイミド、大内新興化学(株)製「バルノックPM」
可塑剤:(株)ADEKA製「アデカサイザーRS700」
一方向性繊維シート1:東レ(株)製「トレカT700S」炭素繊維フィラメント(引張弾性率230GPa、フィラメント径7μm、密度1.80g/cm3)を用い、エポキシ樹脂で結合して、3水準の厚み0.05mm(目付量60g/m2)、0.10mm(目付量120g/m2)、0.20mm(目付量240g/m2)のシートを調製した。 一方向性繊維シート2:帝人(株)製「テナックスIMS60」炭素繊維フィラメント(引張弾性率290GPa、フィラメント径6μm、密度1.73g/cm3)を用い、エポキシ樹脂で結合して、厚み0.10mm(目付量120g/m2)のシートを調製した。
一方向性繊維シート3:東レ(株)製「ケブラー49」アラミド繊維フィラメント(引張弾性率112GPa、フィラメント径12μm、密度1.45g/cm3)を用い、エポキシ樹脂で結合して、3水準の厚み0.05mm(目付量50g/m2)、0.10mm(目付量100g/m2)、0.20mm(目付量200g/m2)のシートを調製した。
一方向性繊維シート4:東レ(株)製「ケブラー119」アラミド繊維フィラメント(引張弾性率54.7GPa、フィラメント径12μm、密度1.44g/cm3)を用い、エポキシ樹脂で結合して、3水準の厚み0.05mm(目付量50g/m2)、0.10mm(目付量100g/m2)、0.20mm(目付量200g/m2)のシートを調製した。
すだれシート1:一方向に配向するアラミド繊維の撚りコード(1670dtex/1×2)が、綿の細糸(番手20S/1)で連結されたシート(通称、すだれコード)。撚りコードの密度を50本/5cmで、細糸の密度を4本/5cm、シートの厚みを0.7mmとした。
すだれシート2:一方向に配向するPET繊維の撚りコード(1100dtex/1×2)が、綿の細糸(番手20S/1)で連結されたシート(通称、すだれコード)。撚りコードの密度を50本/5cmで、細糸の密度を4本/5cm、、シートの厚みを0.6mmとした。
12Kのマルチフィラメント糸[東レ(株)製「トレカT700SC-12000」、単糸繊度0.67dtex、総繊度800tex]1本を片撚りした炭素繊維コード(12K-1/0,引張弾性率230GPa)を作製し、HNBR系オーバーコート処理剤による接着処理を行って、心線径1.1mmの心線を得た。
表2に示す織布をRFL処理液およびゴム糊を用いて浸漬処理して歯布前駆体を作製した。詳しくは、RFL処理は、表3に示す2種類のRFL処理液(RFL1、RFL2)を用い、RFL1、RFL2の順に浸漬処理を行った。さらに、ゴム糊処理も、表4に示す2種類のゴム糊(ゴム糊1、ゴム糊2)を用い、ゴム糊1、ゴム糊2の順に浸漬処理を行った。
歯部(第1ゴム層、第2ゴム層)および背部(背ゴム層)を形成するための未架橋ゴムシートとして、表1に示す配合の各ゴム組成物について、バンバリーミキサーを用いて混練し、得られた混練ゴムをカレンダーロールで所定の厚みに圧延し、未架橋ゴムシートを作製した。未架橋ゴムシート中に含まれるアラミド短繊維は、圧延方向に配向していた。
実施例A~Mおよび比較例A~Gでは、以下に示すように、本実施形態で説明した予備成形工法を用いて、全厚9.0mm、歯型S14M、歯高さ(歯布含む)5.3mm、歯ピッチ14mm、歯数80、周長1120mm、幅20mmの歯付ベルトを作製した。
各実施例、比較例および参考例で作製した歯付ベルトについて、歯部の構成(補強層の構成)および歯剛性の測定結果を表5~8に示す。
歯付ベルトの歯部に対応する複数の溝部(凹条)を有するプレスモールド(平型)に、歯布を形成する歯布前駆体、第1ゴム層を形成する未架橋ゴムシート(ゴム組成物A)の順に積層し、温度90℃、プレス圧(面圧)20.2MPaの条件で加圧して半架橋状態の積層体Aを形成し、次いで補強層5を形成する一方向性繊維シート(一方向性繊維シート1;目付量120g/m2、厚み0.10mm)を型付けして積層体Bを形成し、さらに第2ゴム層を形成する未架橋ゴムシート(ゴム組成物A)を圧入して予備成形体を作製した。
補強層5を形成する一方向性繊維シート1について、実施例Dでは目付量を60g/m2(厚み0.05mm)に、実施例Eでは目付量を240g/m2(厚み0.20mm)に変更したこと以外は、実施例Bと同様に歯付ベルトを作製した。
補強層5を形成する一方向性繊維シート1について、目付量を60g/m2(厚み0.05mm)に変更したこと以外は、実施例Cと同様に歯付ベルトを作製した。
補強層5を形成する一方向性繊維シートを、一方向性繊維弾性率の異なる一方向性繊維シート2(目付量を120g/m2、厚み0.10mm)に変更したこと以外は、実施例Bと同様に歯付ベルトを作製した。
実施例Hでは、補強層5を形成する一方向性繊維シートを、一方向性繊維弾性率の異なる一方向性繊維シート3(目付量を100g/m2、厚み0.10mm)に変更したこと以外は、実施例Bと同様に歯付ベルトを作製した。
実施例Iでは、補強層5を配置するベルト厚み方向の位置H2を5.3mm(H2/H1×100=100%)に変更したこと以外は、実施例Hと同様に歯付ベルトを作製した。
実施例Jでは、補強層5を形成する一方向性繊維シート3について、目付量を50g/m2(厚み0.05mm)に、実施例Kでは目付量を200g/m2(厚み0.20mm)に変更したこと以外は、実施例Hと同様に歯付ベルトを作製した。
実施例Lでは、補強層5を形成する一方向性繊維シートを、一方向性繊維弾性率の異なる一方向性繊維シート4(目付量を100g/m2、厚み0.10mm)に変更したこと以外は、実施例Bと同様に歯付ベルトを作製した。
比較例Eでは、補強層5を形成する一方向性繊維シート4について、目付量を50g/m2(厚み0.05mm)に、実施例Mでは目付量を200g/m2(厚み0.20mm)変更したこと以外は、実施例Lと同様に歯付ベルトを作製した。
補強層5を配置するベルト厚み方向の位置H2を5.3mm(H2/H1×100=100%)に変更したこと以外は、比較例Eと同様に歯付ベルトを作製した。
比較例Fでは、補強層5を形成する一方向性繊維シートを、すだれシート1(厚み0.70mm)に変更したこと以外は、実施例Bと同様に歯付ベルトを作製した。
比較例Gでは、補強層5を形成する一方向性繊維シートを、すだれシート2(厚み0.60mm)に変更したこと以外は、実施例Bと同様に歯付ベルトを作製した。
補強層を設けない例として、本実施形態で説明した予備成形工法の中で、一方向性繊維シートを使用しない方法で予備成形体を作製した。すなわち、歯付ベルトの歯部に対応する複数の溝部(凹条)を有するプレスモールド(平型)に、歯布を形成する歯布前駆体、歯ゴム層(第1ゴム層と第2ゴム層)を形成する未架橋ゴムシート(ゴム組成物A、シート厚み2.3mm)の順に積層し、温度90℃、プレス圧(面圧)20.2MPaの条件で圧入し、半架橋状態の予備成形体を作製した。
以降の工程は、他の実施例および比較例と同様に歯付ベルトを作製した。
作製した歯付ベルトから試験片(幅20mm、長さ196mm)を採取し、図16(A)に示すように試験片の歯部を歯せん断治具(歯付プーリの歯形状を想定した剛体)の突起部に係合し、1つの歯を一定圧力(締め付けトルク0.98cNm/1mm幅)で押え付けた状態で、オートグラフによって2mm/minの速度で引っ張った時の変位量に対する荷重を測定(図17のグラフ)し、その傾きK1(N/mm)を算出した。このとき、試験片の両端をチャック(掴み具)で掴んだ掴み幅は126mmとした。なお、この方法で得られるK1は歯部の変形だけでなくベルトの弾性伸びによる変位の影響も含まれた測定値である。そのため、図16(B)に示すように、歯せん断治具と係合する部分を除いた方法で、同様に測定して得られた傾きK2をベルトの弾性伸びの影響による数値と見做した。そして、下記の式(1)の関係により、K1とK2とから算出したKの値を、歯部の剛性(歯剛性)を表す指標とした。
歯付ベルトの歯剛性に関する判定は、以下の基準に基づいてAランク~Cランクに分類した。Cランク、Bランク、Aランクの順に歯剛性(耐変形性)に優れるグレードに位置づけされるが、実用的に補強層の効果が顕著に現れるのは、AランクまたはBランクの水準と判定した。
Aランク:K値(相対値)が1.7以上
Bランク:K値(相対値)が1.5以上1.7未満
Cランク:K値(相対値)が1.5未満
[1]一方向性繊維シート1(230GPa)を用いた場合
(実施例A~C、比較例A~C)
補強層(一方向性繊維シート)を含まない比較例Aの歯付ベルト(歯剛性の指標K値1.00)に対して、一方向性繊維弾性率が高い炭素繊維のフィラメントで形成した一方向性繊維シート1(230GPa)を、厚み0.10mm(指数Z=230×0.10=23)で、ベルト厚み方向の位置H2(およびH2/H1の割合)を変量して配置した場合の歯剛性(K値)を比較した例である。
実施例Bの補強層(H2/H1×100=53%、厚み0.10mm、指数Z=23)に対して、厚みを変量した実施例D(厚み0.05mm、指数Z=12)、実施例E(厚み0.20mm、指数Z=46)においても、歯剛性(K値)がAランクとなった。
(実施例G)
実施例Bの補強層の配置(H2/H1×100=53%、厚み0.10mm)において、より一方向性繊維弾性率が高いフィラメントで形成した一方向性繊維シート2(290GPa)を用いた実施例Gの補強層(指数Z=290×0.10=29)でも、歯剛性(K値)がAランクとなった。
(実施例H~K)
実施例Bの補強層の配置(H2/H1×100=53%、厚み0.10mm)において、一方向性繊維弾性率が小さいアラミド繊維のフィラメントで形成した一方向性繊維シート3(112GPa)を用いた実施例Hの補強層(指数Z=112×0.10=11)では、実施例Bよりは小さいが歯剛性(K値)がAランクとなった。
(実施例L~M、比較例D~E)
実施例Hの補強層の配置(H2/H1×100=53%、厚み0.10mm)において、より一方向性繊維弾性率が小さいアラミド繊維のフィラメントで形成した一方向性繊維シート4(54.7GPa)を用いた実施例Lの補強層(指数Z=54.7×0.10=5.5)では、歯剛性(K値)が実施例Hより小さくなりBランクとなった。
この実施例Lの補強層に対して、厚みを大きくした実施例M(厚み0.20mm、指数Z=11)では歯剛性(K値)がAランクとなった。
さらに、比較例Eに対して、補強層の配置をH2/H1×100が100%となる位置に変更した比較例Dでは、一層歯剛性(K値)が不足しCランクとなった。
実施例Bの補強層の配置(H2/H1×100=53%)において、一般的にすだれコードと称されて汎用されているすだれシート1(アラミド繊維)、すだれシート2(PET繊維)を用いて作製した歯付ベルトについて、それぞれ比較例F、比較例Gとして歯剛性(K値)を比較検証した。
これらのすだれシートは、本実施例で用いた一方向性繊維シートに比べて厚みが大きいにもかかわらず、歯剛性(K値)が不足してCランクとなった。
・補強層が配置される領域(歯部の底部から当該補強層までの最大高さH2が、歯部の底部から歯先までの高さH1の30~100%の領域)
・補強層(一方向性繊維シート)の厚みと、繊維フィラメントの引張弾性率との組み合わせ
・指数Zが5以上の場合、Bランク(K値が1.5以上1.7未満)
・指数Zが10以上(60以下)の場合、Aランク(K値が1.7以上)。
2 背部
21 背ゴム層
3 歯部
31 底部
32 歯先
33 第1ゴム層
34 第2ゴム層
4 心線
5 補強層
50 一方向性繊維シート
51 補強繊維フィラメント
52 熱硬化性樹脂
6 歯布
H1 歯高さ
H2 補強層の位置
Claims (4)
- ベルト周方向に所定の間隔で配設された歯部と、前記歯部の輪郭に沿って埋設された補強層と、を有する歯付ベルトであって、
前記補強層は、前記歯部の底部から当該補強層までの最大高さが、前記歯部の底部から歯先までの高さの30~100%の領域の範囲になるように前記歯部に埋設され、
前記補強層は、前記ベルト周方向に配列された複数の補強繊維フィラメントを含み、
前記補強層において、前記ベルト周方向に交差する繊維の単位面積当たりの重量が、前記補強繊維フィラメントの単位面積当たりの重量の30%以下であり、
前記補強層は前記補強繊維フィラメントが、無撚の状態で、前記ベルト周方向に配列しつつシート状になるように結合された構造をしており、
前記補強層の厚みは、0.05~0.2mmであり、
前記補強繊維フィラメントの引張弾性率(GPa)は、
5≦[前記補強層の厚み(mm)]×[前記補強繊維フィラメントの引張弾性率(GPa)]≦60
の条件を満たすことを特徴とする、歯付ベルト。 - 前記補強繊維フィラメントの引張弾性率は、50~300GPaであることを特徴とする、請求項1に記載の歯付ベルト。
- 前記補強繊維フィラメントの太さは、0.1~50μmであることを特徴とする、請求項1または2に記載の歯付ベルト。
- 前記補強層は、前記ベルト周方向に交差する繊維を含まないことを特徴とする、請求項1~3のいずれか一項に記載の歯付ベルト。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280011239.1A CN116964350A (zh) | 2021-01-25 | 2022-01-21 | 齿形带 |
CA3205094A CA3205094A1 (en) | 2021-01-25 | 2022-01-21 | Toothed belt |
US18/273,499 US20240077131A1 (en) | 2021-01-25 | 2022-01-21 | Toothed Belt |
EP22742701.0A EP4283159A1 (en) | 2021-01-25 | 2022-01-21 | Toothed belt |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021009529 | 2021-01-25 | ||
JP2021-009529 | 2021-01-25 | ||
JP2022004259A JP7085699B1 (ja) | 2021-01-25 | 2022-01-14 | 歯付ベルト |
JP2022-004259 | 2022-01-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022158582A1 true WO2022158582A1 (ja) | 2022-07-28 |
Family
ID=82020772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/002298 WO2022158582A1 (ja) | 2021-01-25 | 2022-01-21 | 歯付ベルト |
Country Status (7)
Country | Link |
---|---|
US (1) | US20240077131A1 (ja) |
EP (1) | EP4283159A1 (ja) |
JP (1) | JP7085699B1 (ja) |
CN (1) | CN116964350A (ja) |
CA (1) | CA3205094A1 (ja) |
TW (1) | TWI826909B (ja) |
WO (1) | WO2022158582A1 (ja) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03265739A (ja) | 1990-03-15 | 1991-11-26 | Bando Chem Ind Ltd | タイミングベルト |
JP2001263432A (ja) | 2000-03-15 | 2001-09-26 | Mitsuboshi Belting Ltd | 動力伝動用ベルトの製造方法 |
JP2005041165A (ja) | 2003-07-24 | 2005-02-17 | Mitsuboshi Belting Ltd | 補強布の成形金型への型付け方法 |
JP2010196889A (ja) | 2009-02-27 | 2010-09-09 | Mitsuboshi Belting Ltd | 動力伝動用ベルト |
WO2016047052A1 (ja) | 2014-09-24 | 2016-03-31 | バンドー化学株式会社 | 歯付ベルト |
JP2018119680A (ja) | 2017-01-26 | 2018-08-02 | 三ツ星ベルト株式会社 | 伝動用vベルトおよびその製造方法 |
JP2020517877A (ja) | 2017-04-27 | 2020-06-18 | ゲイツ コーポレイション | 一方向繊維により強化された同期ベルト |
JP2021009529A (ja) | 2019-07-01 | 2021-01-28 | ホーチキ株式会社 | 放送用設備 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3964328A (en) * | 1973-09-07 | 1976-06-22 | The Gates Rubber Company | Elastomer-free fabric surface for power transmission belt tooth facing |
US3894900A (en) * | 1973-09-07 | 1975-07-15 | Gates Rubber Co | Elastomer-free fabric surface for power transmission belt tooth facing |
IT1054422B (it) * | 1975-12-05 | 1981-11-10 | Pirelli | Cinghia dentata termooleoresistente |
US4514179A (en) * | 1983-03-02 | 1985-04-30 | Uniroyal, Inc. | Power transmission belt with fabric cover |
US4583963A (en) * | 1983-06-09 | 1986-04-22 | Dayco Corporation | Belt construction having enhanced tooth strength |
JPS6062641U (ja) * | 1983-10-07 | 1985-05-01 | 三ツ星ベルト株式会社 | 歯付ベルト |
US5536214A (en) * | 1993-12-07 | 1996-07-16 | Mitsuboshi Belting Ltd. | Power transmission belt and method of manufacturing the same |
DE102011050483A1 (de) * | 2011-05-19 | 2012-11-22 | Contitech Antriebssysteme Gmbh | Antriebsriemen mit einem Verstärkungsband oder einem Verstärkungsgeflecht oder mit zonenweise angeordneten Verstärkungselementen innerhalb des Unterbaus |
MX2019012836A (es) * | 2017-04-27 | 2019-11-28 | Gates Corp | Cinturon sincronico con dientes rigidos. |
EP4141286A4 (en) * | 2020-07-03 | 2023-10-25 | Bando Chemical Industries, Ltd. | DRIVE BELT |
-
2022
- 2022-01-14 JP JP2022004259A patent/JP7085699B1/ja active Active
- 2022-01-21 CA CA3205094A patent/CA3205094A1/en active Pending
- 2022-01-21 WO PCT/JP2022/002298 patent/WO2022158582A1/ja active Application Filing
- 2022-01-21 US US18/273,499 patent/US20240077131A1/en active Pending
- 2022-01-21 EP EP22742701.0A patent/EP4283159A1/en active Pending
- 2022-01-21 CN CN202280011239.1A patent/CN116964350A/zh active Pending
- 2022-01-25 TW TW111103105A patent/TWI826909B/zh active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03265739A (ja) | 1990-03-15 | 1991-11-26 | Bando Chem Ind Ltd | タイミングベルト |
JP2001263432A (ja) | 2000-03-15 | 2001-09-26 | Mitsuboshi Belting Ltd | 動力伝動用ベルトの製造方法 |
JP2005041165A (ja) | 2003-07-24 | 2005-02-17 | Mitsuboshi Belting Ltd | 補強布の成形金型への型付け方法 |
JP2010196889A (ja) | 2009-02-27 | 2010-09-09 | Mitsuboshi Belting Ltd | 動力伝動用ベルト |
WO2016047052A1 (ja) | 2014-09-24 | 2016-03-31 | バンドー化学株式会社 | 歯付ベルト |
JP2020038008A (ja) * | 2014-09-24 | 2020-03-12 | バンドー化学株式会社 | 歯付ベルト |
JP2018119680A (ja) | 2017-01-26 | 2018-08-02 | 三ツ星ベルト株式会社 | 伝動用vベルトおよびその製造方法 |
JP2020517877A (ja) | 2017-04-27 | 2020-06-18 | ゲイツ コーポレイション | 一方向繊維により強化された同期ベルト |
JP2021009529A (ja) | 2019-07-01 | 2021-01-28 | ホーチキ株式会社 | 放送用設備 |
Also Published As
Publication number | Publication date |
---|---|
US20240077131A1 (en) | 2024-03-07 |
JP7085699B1 (ja) | 2022-06-16 |
CA3205094A1 (en) | 2022-07-28 |
EP4283159A1 (en) | 2023-11-29 |
JP2022113651A (ja) | 2022-08-04 |
CN116964350A (zh) | 2023-10-27 |
TWI826909B (zh) | 2023-12-21 |
TW202235756A (zh) | 2022-09-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5002043B2 (ja) | ゴム製歯付ベルトおよび歯付ベルト用ゴム組成物 | |
JP5597545B2 (ja) | 歯付きベルト | |
WO2015030134A1 (ja) | 歯付ベルト | |
KR102431563B1 (ko) | 헬리컬 톱니 벨트 및 벨트 전동 장치 | |
JP6748131B2 (ja) | はす歯ベルト伝動装置 | |
WO2006057129A1 (ja) | Vリブドベルト及びそれを用いた自動車の補機駆動用ベルト伝動装置 | |
JP6616808B2 (ja) | 伝動用vベルト | |
US20210102601A1 (en) | Transmission V-Belt and Manufacturing Method Therefor | |
US11885392B2 (en) | Toothed belt made of rubber, and rubber composition | |
JP2010230146A (ja) | 伝動用ベルト | |
WO2019013232A1 (ja) | はす歯ベルトおよびベルト伝動装置 | |
WO2022158582A1 (ja) | 歯付ベルト | |
JP6676725B2 (ja) | 摩擦伝動ベルト、そのためのコード並びにそれらの製造方法 | |
JP2011085160A (ja) | 歯付きベルト | |
JP2010196889A (ja) | 動力伝動用ベルト | |
JP7235919B2 (ja) | 歯付ベルトおよびその製造方法 | |
JP7255006B1 (ja) | 歯付ベルトおよびその製造方法 | |
WO2023054413A1 (ja) | 歯付ベルトおよびその製造方法 | |
WO2023008332A1 (ja) | 歯付ベルトおよびその製造方法 | |
JP2004245405A (ja) | 歯付ベルト | |
CA3163908A1 (en) | Cogged v-belt | |
WO2018139578A1 (ja) | 伝動用vベルトおよびその製造方法 | |
KR20220138865A (ko) | 톱니 벨트 전동 장치 | |
JP2010144854A (ja) | ゴム製歯付ベルト |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22742701 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 3205094 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18273499 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280011239.1 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022742701 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2022742701 Country of ref document: EP Effective date: 20230825 |