Experimental Study on Tightening Torque of Bottle Cap

摘要

Too much tightening torque of the bottle cap can cause the user difficulty in opening the bottle. The purpose of this paper was to explore factors affecting the tightening torque of the bottle cap. The test scenario of tightening operation of bottle cap was established. The tightening torques of sixteen young subjects (8 male/8 female) were measured at four operating distances, two working postures and three types of bottle cap diameters (30 mm, 36 mm and 60 mm). The results showed the larger the bottle cap diameter, the greater the tightening torque required of bottle cap. Gender, height, weight and hand length had significant influence on the tightening torque, and the tightening torque of men was larger than that of women when opening the bottle cap. However, the working posture and distance had no significant impact on the tightening torque. The research results could have some practical reference value for the ergonomic design and evaluation of manual knob torque.