Locking member for building formworks

Abstract

A locking member is suitable for assembling two building formworks each including a positioning hole and a locking hole, and includes a driven portion, a shoulder formed on one end of the driven portion, a first tapered section connected to the shoulder and configured to be inserted into the positioning hole of one building formwork, and a second tapered section connected to the first tapered section and configured to be inserted into the locking hole of the other building formwork, and a threaded portion connected to the second tapered section and configured to threadedly engage with the locking hole.

What is claimed is: 
     
         1 . A locking member extending along and rotatable about an axis and suitable for assembling two building formworks, each building formwork including a wall plate, and a frame disposed on one side surface of the wall plate, the frame of each building formwork having at least one positioning hole and at least one locking hole, the positioning hole having a shoulder, the locking hole having an internally threaded section, said locking member comprising:
 a driven portion;   a shoulder formed on one end of said driven portion;   a positioning portion having a conical shape and including a first tapered section connected to said shoulder, and a second tapered section connected to said first tapered section at a side opposite to said shoulder, said positioning portion gradually tapering from said first tapered section to said second tapered section in a direction away from said shoulder, each of said first tapered section and said second tapered section having a cross section smaller than that of said shoulder, said first tapered section being configured to be inserted into the at least one positioning hole of one of the building formworks to restrict said locking member to rotate about the axis, said second tapered section being configured to be inserted into the at least one locking hole of the other one of the building formworks; and   a threaded portion connected to said second tapered section at a side opposite to said first tapered section, said threaded portion being configured to threadedly engage with the internally threaded section of the at least one locking hole of the other one of the building formworks until said shoulder of said locking member abuts against the shoulder of the at least one positioning hole of the one of the building formworks.   
     
     
         2 . The locking member as claimed in  claim 1 , wherein said driven portion includes a surrounding wall, and a groove defined by said surrounding wall. 
     
     
         3 . The locking member as claimed in  claim 2 , further comprising a connecting rod portion received in said groove and having a shape corresponding to that of said groove. 
     
     
         4 . The locking member as claimed in  claim 1 , wherein said driven portion has a protruding post protruding in a direction opposite to said shoulder. 
     
     
         5 . The locking member as claimed in  claim 4 , wherein said protruding post is polygonal. 
     
     
         6 . The locking member as claimed in  claim 1 , wherein said first tapered section and said second tapered section are integrally formed as a single piece. 
     
     
         7 . The locking member as claimed in  claim 1 , wherein each of said first tapered section and said second tapered section has a taper ratio of 1:8.