Connecting structure

Abstract

A connecting structure a one rod-shaped member and a counterpart rod-shaped member includes a hollow connecting pipe disposed to straddle contact surfaces with the one member and the counterpart member, and a fixing unit including a bolt with which the connecting pipe is integrated with the one member and the counterpart member. The one member and the counterpart member include upright grooves configured to house the connecting pipe entirely. The upright grooves face each other to dispose the contact surfaces therebetween and extend vertically. The connecting pipe has a side surface provided with a lateral hole configured such that the fixing unit including the bolt is inserted thereinto. The upright grooves extend toward without reaching a lower surface of the one member and a lower surface of the counterpart member. The upright grooves have respective bottoms serving as upward surfaces configured such that the connecting pipe is placed thereon.

1 . A connecting structure between a first rod-shaped member and a second rod-shaped member,
 the connecting structure comprising:   a hollow connecting pipe disposed to straddle contact surfaces with the first rod-shaped member and the second rod-shaped member; and   a fixing unit including a bolt with which the connecting pipe is integrated with the first rod-shaped member and the second rod-shaped member,   the first rod-shaped member and the second rod-shaped member including upright grooves configured to house the connecting pipe entirely, the upright grooves facing each other to dispose the contact surfaces therebetween and extending vertically,   the connecting pipe having a side surface provided with a lateral hole configured such that the fixing unit including the bolt is inserted thereinto,   the upright grooves extending toward without reaching a lower surface of the first rod-shaped member and a lower surface of the second rod-shaped member, and   the upright grooves having respective bottoms serving as upward surfaces configured such that the connecting pipe is placed thereon.   
     
     
         2 . The connecting structure according to  claim 1 , wherein
 the fixing unit is formed of an embedded shaft to be embedded in pilot holes formed in back surfaces of the upright grooves and the bolt to be inserted into the lateral hole, and   the embedded shaft has an end surface where a female screw is provided to be threadedly engaged with the bolt.   
     
     
         3 . The connecting structure according to  claim 1 , wherein
 the upright grooves are formed such that a surface of at least one of the first rod-shaped member and the second rod-shaped member is hollowed out, and   downward surfaces facing an upper surface of the connecting pipe are provided at upper parts of the upright grooves.   
     
     
         4 . The connecting structure according to  claim 2 , wherein
 the upright grooves are formed such that a surface of at least one of the first rod-shaped member and the second rod-shaped member is hollowed out, and   downward surfaces facing an upper surface of the connecting pipe are provided at upper parts of the upright grooves.