| 摘要 |
<p>An elongated stamped sheet-metal slider member facilitates the alinement and support for the guiding pulley of a band saw. The slider member has several integrally-formed portions. A first portion depends within the housing, and the pulley is rotatably supported thereon about an axis substantially perpendicular thereto. A second portion of the slider member is bent away, forming an obtuse angle with the first portion, and extends through a slotted opening formed in the housing. This second portion has a pair of ears projecting laterally of the slotted opening for preventing the slider from passing completely into the housing. The ears have respective side edge portions engaging the outer surface of the housing and forming therebetween a fulcrum for pivotal movement of the slider member and hence the pulley about an axis which is above the pulley axis and transverse thereto. A jack screw is carried by the housing for engaging the first portion of the slider member below the pulley axis. Movement of the jack screw pivots the slider member and hence the pulley about the pivot axis of the slider member, thereby facilitating an alinement of the guiding pulley. A third portion of the slider member is bent back into the housing above the fulcrum and within a plane substantially at right angles to the plane of the first portion of the slider member. A cap screw is secured at its lower end of the third portion of the slider member, and the head of the cap screw is captured by a tensioning knob for supporting the slider and hence the pulley within the housing. By means of the tensioning knob and cap screw, the slider member may be raised and lowered vertically within the housing, and thus the pivot axis of the slider member will be adjusted vertically. In addition, a suitable spring is provided to tension the assembly and hence the guiding pulley, and as a result the pivot axis of the slider member will float along the outer surface of the housing.</p> |
