目的 设计出一种文件袋密封涂胶装置，其涂胶机构能够适应不同尺寸的文件袋密封的涂胶，使机构更易于适应复杂的工况环境。方法 基于TRIZ理论的动态化原理和机械系统的替代原理，创新设计一种文件袋密封涂胶机构。结果 该文件袋密封涂胶装置能够对不同尺寸的文件袋进行精准涂胶，消除了人为涂胶可能产生的的泄密问题，极大地提高了生产效率和安全性。结论 运用TRIZ理论，成功地解决了现有涂胶装置对不同尺寸文件袋施胶存在的成本高、生产效率低以及封口不准确等问题。

The work aims to design a glue coating device for document bags and make the glue coating mechanism adapt to the gluing sealing of document bags of different sizes and the complex working conditions. Based on the dynamic principle and the substitution principle of mechanical system of TRIZ theory, the glue coating mechanism of the document bag was designed. The glue coating device for document bag sealing could accurately apply glue to different sizes of document bags, thus eliminating the problem of leakage caused by artificial glue and greatly improving the production efficiency and safety. By TRIZ theory, the problems of high cost, low production efficiency and inaccurate sealing of existing glue coating devices for different sizes of documents are solved.