<；P>；PROBLEM TO BE SOLVED: To provide a joint appropriate for connecting a pair of sheet fixing frames which fix a sheet, in series. <；P>；SOLUTION: The joint G connects, in series, the pair of sheet fixing frames 1 and 2 which respectively include a right and left pair of upper side dovetail grooves A and B in a plane and a lower side dovetail groove C formed in the middle of a back surface. The joint G includes: a joint body 3 formed in an vertically long plate-shaped； and a projection 4 provided to project upward from the central portion of the joint body 3. By press-fitting the front and back ends of the joint body 3 into the lower side dovetail grooves C and C of the respective sheet fixing frames 1 and 2, the respective sheet fixing frames 1 and 2 are maintained in a state of being connected to each other. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
