目的 设计一种利用卷簧对包装薄膜实现紧膜的裹包类机械。方法 利用卷簧回旋力来实现裹卷运动而实现变力的输出，然后利用轴与齿轮之间的相互传动来实现力的赋予。卷簧的运动相当于给予薄膜一定的张力，而这种可实现张力也成为卷簧裹包的施力部分，通过该机械各根轴间与相对应齿轮的相互配合实现该紧膜机械的传动。结果 针对薄膜张力的不同施加相对张力的要求，得出同一种膜在不同横向张力下的紧膜张力不同。结论 卷簧式紧膜包装机械设计对于薄膜包装材料在不同的张力下对于物品的包裹及膜材包装件缓冲特性实践有重要意义。

The work aims to design wrapping machinery used to tighten package films with coiled spring. Wrapping movement was achieved with coiled spring rotation force, so that the output of variable force was realized. Then the force was applied through the mutual transmission between the shaft and the gear. When the coiled spring was moving, certain tension was given to the film; however, such achievable tension could also become the part to apply force on the wrapping of coiled spring. The transmission of the film tightening machinery was achieved through the interaction between each shaft and the corresponding gear of the machinery. With respect to the requirements of corresponding tensions applied based on different film tensions, the film tightening tensions of the same film were different under various transverse tensions. The design of coiled spring film-tightening packaging machine has significant importance for the practices regarding the packaging of goods and buffering properties of the film packaging pieces when the film packaging materials are under different tensions.