Abstract: A first motor is fitted to a threaded shaft onto which first and second nuts are screwed, a first holder to which a second motor for rotating the first nut is fixed is fitted to the shaft, the first holder is provided with a first bracket to which one ends of first and second connecting rods are rotatably connected, a second bracket is rotatably connected to ends of the first and second connecting rods opposite to the end where the first bracket is installed so that the first and second connecting rods are put in parallel positions, a second holder is secured to the second nut, the first holder and the second holder engage with a guide rail installed in parallel with the first shaft so as to be moved along the guide rail when the first shaft rotates, the second holder is provided with a third bracket, one end of a third connecting rod is rotatably connected to the third bracket, and central part of the second connecting rod is rotatably connected to an end of the third connecting rod opposite to the end where

Abstract: For serving as an insertion mechanism M1, a pressure member 12 is supported in a vertically swingable manner through swing arms 51 to tip ends of vertically swingable push arms 13, and the pressure member 12 is adapted to push a corner piece in an inclining nose-up position. For serving as a caulking mechanism M2, an opening angle of a tip end caulking claw 40 of a caulking plate 15 is made larger than the right angle. For serving as an insertion/caulking device, a drive force transmitting mechanism M3 is installed, which actuates the insertion mechanism M1 interlocking with a former period stroke of one hydraulic cylinder 26 and actuates the caulking mechanism M2 interlocking with its latter period stroke. Thereby, an assembly accuracy and a work efficiency can be improved when assembling the corner piece. Further, the insertion mechanism and the caulking mechanism can be operated in sequence according to a work stroke by one stretching operation of one drive actuator.

Abstract: A crimping device having a reciprocating driven member which is moved back and forth at a rear end of a tubular body inside, a cam which is coupled to a front end of the reciprocating driven member through a link and can be swung with a pin as its fulcrum point, a caulking arm which is in forced contact with the cam at a rear end roller and has a front end claw freely going in and out of a caulking concave portion located at a front end of a main body and is carried by a separate pin at its intermediate portion, a return spring which returns the reciprocating driven member to an ordinary rear end position, and a return spring which always presses the roller onto a cam surface of the cam, the cam surface having such a shape as to push up the roller when the reciprocating driven member is moved forward.