| 摘要 |
A screen tensioning assembly for vibratory, particulate material-screening apparatus of the type including a frame having spaced, parallel, upstanding side panels connected by spaced, horizontal screen support members, and two, extended area apertured screens supported on the support members and extending substantially between the side panels for separating finer from coarser material. An up-turned hook portion is formed at one side of each of the screens. Each of the screens is tensioned by a clamping member having opposite ends with one end normally engaging the respective hook portion and the other end engaging the respective side panel. Each clamping member has a pivot member secured thereto adjacent its other end, extending through an aperture in the respective side panel, and having a portion engaging the respective side panel so that the clamping member may be pivoted upwardly from the respective screen to a stored position thereby to disengage the one end thereof from the respective hook portion. Each clamping member has one end of a stud connected thereto with its other end extending through another aperture in the respective side panel. Each stud has resilient means on its other end which engages the respective side panel for urging the stud in a direction to cause the respective clamping member to apply tension on the respective screen. Each stud has a wedge removably seated in a slot in its other end which normally engages the resilient means so that removal of the wedge permits removal of the resilient means from the other end of the stud thus permitting the respective clamping member may be pivoted to its stored position. The two screens have adjacent side edges which define an elongated, narrow space therebetween intermediate and parallel with the side panels. Down-turned hook portions are respectively formed at the adjacent side edges of the screens and respectively engage upstanding elements on the support members. A member is provided which removably closes and seals the spacing against the entry of material, the closing and sealing member including an upper element which extends across and closes the space and a lower element seated in the space and having portions which respectively resiliently engage the down-turned hook portions.
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