Bridge seam telescoping device

The utility model provides a bridge seam telescoping device, include one number violently the pipe and violently manage for two numbers, the intraductal horizontal pole that is equipped with no. Of horizontal stroke, no. Two intraductal horizontal poles that are equipped with no. Two of horizontal stroke, the both ends of a horizontal pole and no. Two horizontal poles vertically all are equipped with the stand, stand on horizontal pole passes through the telescopic link to be connected with the stand on no. Two horizontal poles, still including a top spring, push up the one end of spring and violently manage fixed connection one number, push up the other end of spring and violently manage fixed connection for two numbers, still include the metal sheet, the limit portion of metal sheet is equipped with open structure's cavity, be equipped with the arm -tie in the cavity, the bottom of metal sheet and arm -tie all with stand fixed connection. Connect through the crossbeam in the middle of two stands. The utilit