TOOTHED BELT

• Main Authors: ITSUMI YUSUKE, OSAKI YUTAKA
• Format: Patent
• Language: English; Japanese
• Published: 04.08.2022
• Subjects: BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVINGPURPOSES; BLASTING; CHAINS; ENGINEERING ELEMENTS AND UNITS; FITTINGS PREDOMINANTLY USED THEREFOR; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a toothed belt in which sufficient dedendum crack (tooth chipping) resistance is secured while maintaining flexibility.SOLUTION: Regarding a toothed belt 1 having tooth parts 3 arranged at predetermined intervals in a belt circumferential direction and a reinforcing layer 5 embedded along a contour of the tooth parts 3, the reinforcing layer 5 is embedded in the tooth part 3 so that a position H2 (height) is within a range of 30 to 100% of a tooth height H1; the reinforcing layer 5 includes a plurality of reinforcing fiber filaments 51 arranged in the belt circumferential direction; a weight per unit area of fibers intersecting in the belt circumferential direction is 30% or less of a weight per unit area of the reinforcing fiber filament; the reinforcing fiber filaments 51 are arranged in the belt circumferential direction in an untwisted state and connected in a sheet manner; a thickness of the reinforcing layer 5 is within a range of 0.05 to 0.2 mm; and a tensile elastic modulus of the reinforcing fiber filament satisfies a condition of 5≤[thickness of the reinforcing layer (mm)]×[tensile elastic modulus (GPa) of the reinforcing fiber filament]≤60.SELECTED DRAWING: Figure 2 【課題】屈曲性を確保しつつ十分な耐歯元亀裂（歯欠け）性を確保した歯付ベルトを提供する。【解決手段】ベルト周方向に所定の間隔で配設された歯部３と、歯部３の輪郭に沿って埋設された補強層５とを有する歯付ベルト１に関して、補強層５は、位置Ｈ２（高さ）が、歯高さＨ１の３０～１００％の領域の範囲になるように歯部３に埋設され、補強層５は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５１を含み、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、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、補強繊維フィラメント５１が、無撚の状態で、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、補強層５の厚みを０．０５～０．２ｍｍの範囲にし、補強繊維フィラメントの引張弾性率は、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。【選択図】図２