Clamping device

The purpose of the present invention is to provide a clamping device which securely fixes the combination of a housing and a head of a filter assembly so as to prevent leakage of a chemical agent and which can be more easily fixed and unfixed. To this end, the clamping device according to the present invention comprises: a first clamp coupled to the outside of a filter head of a filter assembly; a second jig coupled to the outside of the filter housing of the filter assembly; and a third jig that urges the back surface of the first jig or the second jig and applies pressure in the joining direction in which the first jig and the second jig approach each other. 本发明的目的在于提供一种夹紧装置，坚固地固定过滤器组件的外壳和头的结合，以防止化学制剂泄漏的同时能够更加容易进行固定及解除固定。用于实现该目的的本发明的夹紧装置包括：第一夹具，结合于过滤器组件的过滤器头的外侧；第二夹具，结合于过滤器组件的过滤器外壳的外侧；及第三夹具，对所述第一夹具或者所述第二夹具的背面施力，向所述第一夹具和所述第二夹具相互接近的结合方向进行加压。