Patent ID: 6364819
Filing Date: 2002-04-02
Classification: B65D

Abstract:
A fastening device for use with a packing box comprising:(a) a cylindrical shell of dose to a square in cross section; (b) a flange formed in one-piece with said cylindrical shell so as to be extending outward from one of the openings of said cylindrical shell; (c) a pair of hooks, each of which shows dose to a T-letter like shape in cross section and has a vertical member thereof linked via a hinge to one of the two sides of the other opening of said cylindrical shell, said two sides being located opposit to each other; (d) a tab provided on the inside surface of one of said pair of hooks, said pair of hooks being allowed to open outward and close inward by pushing in and pulling out said tab, respectively; and (e) an engaging member formed on the inside surface of one hook of said pair of hooks and a plarality of engagement notches formed on the inside surface of the other hook of said pair of hooks, in which said engaging member and said engagement notches are allowed to engage with each other, an angle of said pair of hooks against said cylindrical shell is made variable by changing the position where said engaging member and said plurailty of notches are engaged with each other, and the distance between said flange and said pair of hooks is made variable by adjusting said angle, wherein an upper box and a lower box are joined together by first placing said pair of hooks and said cylindrical shell into a hole for fastening provided on said upper box and lower box while said upper box and lower box being superimposed with each other so as to have said holes for fastening aligned with each other and then by opening outward said pair of hooks to have the outside surface of said each respective hook brought into contact with the peripheral edges and surfaces ajoining thereto of said hole for fastening and at the same time to have said peripheral edges and surfaces adjoing thereto of said hole for fastening sandwiched between said outside surface of said each respective hook and the flange.