公开(公告)号：US06267038B1

公开(公告)日：2001-07-31

申请号：US09020186

申请日：1998-02-06

申请人： Michael L. O'Banion ,  Frederick R. Bean ,  Louis M. Shadeck ,  Warren A. Ceroll ,  David A. Porter ,  Kendall M. Smith

发明人： Michael L. O'Banion ,  Frederick R. Bean ,  Louis M. Shadeck ,  Warren A. Ceroll ,  David A. Porter ,  Kendall M. Smith

IPC分类号： B27B1900

CPC分类号： B23D51/14 ,  B23D49/007 ,  Y10T83/704 ,  Y10T83/7065 ,  Y10T83/937

摘要： A scroll saw including an adjustable tensioning mechanism is disclosed. The saw includes a housing having an inner surface and a pivoting arm having a rearward end disposed within an opening in the housing. A first blade clamp is disposed at the forward end of the pivoting arm and secures the upper end of a saw blade. The lower end of the saw blade is secured in a second blade clamp disposed at the forward end of a lower arm. A wedge is disposed within the housing, in contact with the inner surface of the housing. The wedge also is disposed in contact with and translatable along a surface of the pivoting arm. A rod is linked to the wedge at one end and extends through the pivoting arm. The rod includes an upwardly turned arm. A cam having a spiral track is rotatably mounted at the front of the pivoting arm with the upwardly turned arm disposed in the track. Rotation of the cam causes the track to move along the upwardly turned arm, further causing the rod and wedge to move forwardly, with the contact between the wedge and the inner surface causing the wedge and the rearward end of the pivoting arm to pivot downwardly, and the forward end of the pivoting arm to pivot upwardly to increase the tension of the blade.

摘要翻译： 公开了一种包括可调张紧机构的卷锯。 锯包括具有内表面的壳体和具有设置在壳体中的开口内的后端的枢转臂。 第一刀片夹具设置在枢转臂的前端并固定锯片的上端。 锯片的下端固定在设置在下臂前端的第二刀片夹具中。 楔形件设置在壳体内，与壳体的内表面接触。 楔形件也沿着枢转臂的表面设置成可接触并可平移。 杆在一端连接到楔块并且延伸穿过枢转臂。 杆包括向上转动的臂。 具有螺旋轨道的凸轮可旋转地安装在枢转臂的前部，向上转动的臂布置在轨道中。 凸轮的旋转导致轨道沿着向上转动的臂移动，进一步导致杆和楔向前移动，楔与内表面之间的接触导致楔形件和枢转臂的后端向下枢转， 并且枢转臂的前端向上枢转以增加叶片的张力。