Patent ID: 8046908
Filing Date: 2011-11-01
Classification: B23P,Y10T

Abstract:
1. A press for attaching nuts to pipes comprising: a frame having an upper base and a lower base, wherein the lower base supports guide posts erected at both sides of a front part of the lower base, and wherein the upper base is fixed and supported on the guide posts; a movable support having a base end supported rotatably around a horizontal axis at a rear end of the lower base, and a front end extending to a front end side of the lower base so as to be movable circularly in a vertical direction, thereby the movable support is configured to be inserted into, and support, a pipe, a box-like hydraulic cylinder having a cylinder case for pressing a lower pattern disposed at the front end of the movable support, the lower pattern disposed in a piston of the box-like hydraulic cylinder, and moving up and down by projecting upward from the cylinder case, a nut receiving recess provided at an upper end of the lower pattern, a lifter for moving up and down a front end position of the movable support by abutting against and supporting in a slightly lifted state, a stopper for abutting against and supporting a middle position of the movable support by lifting slightly, and the stopper moving up and down so that an end face of a pipe adjacent to an end opening of the pipe contacting the movable support may be positioned to contact the stopper, an upper pattern comprising an upper pattern support, a back plate, a die holder, and a crimping die, the upper pattern support movable up and down along the guide posts, and the crimping die disposed vertically on a same axial line as the lower pattern, and a hydraulic cylinder having a piston rod for pressing the upper pattern disposed on the upper base, and pressing the upper pattern support downward with the piston rod disposed on the same axial line as the crimping die, wherein an applied force from the hydraulic cylinder for pressing the upper pattern, which presses the upper pattern support and the crimping die downward, is set larger than an applied force from the box-like hydraulic cylinder for pressing the lower pattern, which presses the lower pattern upward.