Light steel keel connecting structure

Abstract

A light steel keel connecting structure, comprising at least two light steel keels, each of which has a connecting surface connecting with the other light steel keel, and connecting pieces for connecting the light steel keels, characterized in that concaves are provided on each of the connecting surfaces respectively which are depressed toward inside of the light steel keels, and the concaves of two connecting surfaces which are connected vertically are disposed by way of embedding, and at least two connecting holes are provided at corresponding positions of two concaves that are embedded, respectively, and the connecting pieces are provided within the connecting holes in a state of connection. The terminals of the connecting pieces at one end where depression sides of the concaves are located do not go beyond outer edges of the openings of the concaves on the same side as the terminals of the connecting pieces. At the junction of the light steel keel connecting structure of the invention, there is provided, a concave structure, for which, a mechanized mass production can be implemented very easily. The positioning is extremely easy during assembling, because concave structures of upper and lower connecting surfaces are engaged with each other. Strength of connection and rigidity of light steel keels are greatly improved. Top surfaces of connecting pieces can be wholly submerged in the concave, and accordingly, they will not cause interference to other connecting components on surfaces of the light steel keels.

What is claimed is: 
     
         1 . A light steel keel connecting structure, comprising at least two light steel keels, each of which has a connecting surface connecting with the other light steel keel, and connecting pieces for connecting, the light steel keels, characterized in that, concaves are provided on each of the connecting surfaces respectively which are depressed toward inside of the light steel keels, and the concaves of two connecting surfaces which are connected vertically are disposed by way of embedding, and at least two connecting holes are provided at corresponding positions of two concaves that are embedded, respectively, and the connecting pieces are provided within the connecting holes in as state of connection. 
     
     
         2 . The light steel keel connecting structure according to the  claim 1 , characterized in that, the terminals of the connecting pieces at one end where depression sides of the concaves are located do not go beyond outer edges of the openings of the concaves on the same side as the terminals of the connecting pieces. 
     
     
         3 . The light steel keel connecting structure according to the  claim 1 , characterized in that, the center distance between any two adjacent connecting pieces is not smaller than three times of the diameter of the connecting pieces, and the distance from the center of any of the connecting pieces to any of the outer edges of the light steel keels is not smaller than one and half times of the diameter of the connecting pieces. 
     
     
         4 . The light steel keel connecting structure according to the  claim 1  characterized in that, the openings of the concaves are slightly larger than bottom surfaces, and the connecting holes are provided on the bottom surfaces of the concaves. 
     
     
         5 . The light steel keel connecting structure according to the  claim 1 , characterized in that, the shapes of bottom surfaces of the two concaves that are embedded vertically are shapes of circle, cross, square, rectangle, or ring, which match to each other vertically. 
     
     
         6 . The light steel keel connecting structure according to the  claim 1 , characterized in that, the light steel keels comprise a main light steel keel and at least one abutting light steel keel, which are connected to each other, each of the main light steel keel and the abutting light steel keel comprises an upper wing plate and a lower wing plate that are disposed horizontally and in parallel, and a web connected vertically between one side of the upper wing plate and one side of the lower wing plate, the concaves are disposed at location where the upper wing, plate of the main light steel keel and the upper wing plate of the abutting light steel keel are connected and at location where the lower wing plate of the main light steel keel and the lower wing plate of the abutting light steel keel are connected, and concaves on the upper and lower wing plates of the main light steel keel are embedded inside concaves on the upper and lower wing plates of the abutting light steel keel, respectively. 
     
     
         7 . The light steel keel connecting structure according to the  claim 6 , characterized in that, the number of the abutting, light steel keel is one, the upper and lower wing plates of the main light steel keel are provided one said concave in symmetric positions of the upper and lower wing plates of the main light steel keel, respectively, the upper and lower wing plates of the abutting light steel keel are also provided one said concave in symmetric positions of the upper and lower wing plates of the abutting light steel keel, respectively. 
     
     
         8 . The light steel keel connecting structure according to the  claim 6 , characterized in that, the number of the abutting light steel keel is two or more, and the upper and lower wing plates of the main light steel keel are provided with concaves arranged in a line in symmetric positions of the upper and lower wing plates of the main light steel keel, respectively, the number of cavities is equal to the number of the abutting light steel keel, and the upper and lower wing plates of each abutting light steel keel is provided with one of said concave in symmetric positions of the upper and lower wing plates of each abutting light steel keel, respectively. 
     
     
         9 . The light steel keel connecting structure according to the  claim 6 , characterized in that, the concaves are disposed in the middle part of the upper and lower wing plates of the main light steel keel, one end of the upper wing plate of the abutting light steel keel and one end of the lower wing plate of the abutting light steel keel, and the main light steel keel is connected to one end of the abutting light steel keel. 
     
     
         10 . The light steel keel connecting structure according to the  claim 6 , characterized in that, the concaves are disposed in the middle part of the upper and lower wing plates of the main light steel keel and in the middle part of the upper and lower wing plates of the abutting light steel keel, the abutting light steel keel penetrates through the web of the main light steel keel vertically, and the middle part of the main light steel keel and the middle part of the abutting light steel keel are connected in the state of penetrating through vertically.