Piece is buried to postposition with adjustable it is diversified to exempt from welding

The utility model provides a piece is buried to postposition with adjustable it is diversified to exempt from welding, bury the edition of books body including the postposition, the postposition is buried four edges of the edition of books body and is seted up respectively along horizontal extension's waist type through -hole, and the postposition is buried the middle part of the edition of books body and is seted up two reducing through -holes along the longitudinal extension, two the reducing through -hole buries the longitudinal center line symmetry setting of the edition of books body about the postposition, the reducing through -hole includes interconnect's square through hole and trapezoidal through -hole, be equipped with the tooth line on the trapezoidal through -hole. The utility model discloses simple structure can avoid with welding mode and other structrual joints basically, eliminates because the various shortcomings of welding production, can realize diversified regulation, can regard as multipl