10.Wedge calculation formula

10.Wedge calculation formula		Symbol description and unit
(1) When driving	F=2*R*(μ*cosθ+sinθ)　[kgf] F： Power to drive F=	R： Surface pressure　　[kgf]
		μ： Coefficient of friction
		θ： Half the corner of the tip of the wedge [degree]
(2) When pulling out	F=2*R*(μ*cosθ-sinθ)　[kgf]　 F=	R：Surface pressure　　[kgf]
		μ：Coefficient of friction between object and slope
		θ： Inclined angle of slope [degree]
References: "Machine Official Collection" (co-authored by Masaaki Oishi / Tatsuo Inami) Industrial Mechanics, page 38, see wedges.