Screen arrangement
A screen arrangement ( 10 ) including a stringer ( 16 ), a securing arrangement ( 18 ), and a plurality of screen panels ( 20 ) adapted to couple to the stringer ( 16 ) by the securing arrangement ( 18 ). The plurality of screen panels ( 20 ) may each include a side notch ( 22 ) arranged to define a screen aperture ( 24 ) between adjacent ones of the plurality of screen panels ( 20 ) and the stringer ( 16 ) includes a stringer aperture ( 26 ) aligned with the screen aperture ( 24 ). The securing arrangement ( 18 ) may include an expandable part ( 28 ) adapted to extend from the screen aperture ( 24 ) into the stringer aperture ( 26 ) and a fastener ( 30 ) adapted pass between the screen aperture ( 24 ) and the stringer aperture ( 26 ) so as to expand the expandable part ( 28 ) within the stringer aperture ( 26 ). A related method is also disclosed.
1. A screen arrangement including a stringer, a securing arrangement, and a plurality of screen panels adapted to couple to the stringer by the securing arrangement, wherein the plurality of screen panels each include a side notch arranged to define a screen aperture between adjacent ones of the plurality of screen panels and the stringer includes a stringer aperture fitted with a ferrule alignable with the screen aperture, wherein the securing arrangement includes an expandable part adapted to extend from the screen aperture into the ferrule and a fastener adapted pass between the screen aperture and the ferrule so as to expand the expandable part within the ferrule, wherein the stringer aperture is counter sunk and the ferrule includes a chamfered bottom rim to allow resilient compression thereof to resiliently snap fit through the stringer aperture so as to be secured thereto.
2. The screen arrangement according to claim 1 , wherein the expandable part is provided in the form of a sleeve having a first section adapted to engage with a ledge of the screen aperture and a second section adapted to be expandable by the fastener.
3. The screen arrangement according to claim 2 , wherein the sleeve is removeable.
4. The screen arrangement according to claim 1 , wherein the screen arrangement further includes a stringer cap extending between the stringer and the adjacent ones of the plurality of screen panels.
5. The screen arrangement according to claim 4 , wherein the stringer cap includes a middle section arranged to be fitted between the stringer and the adjacent ones of the plurality of screen panels, and wings.
6. The screen arrangement according to claim 5 , wherein the wings are flared in a direction away from the adjacent ones of the plurality of screen panels.
7. The screen arrangement according to claim 6 , wherein the stringer cap includes a cap aperture arranged to align with the stringer aperture.
8. The screen arrangement according to claim 4 , wherein the stringer cap receives the ferrule.
9. The screen arrangement according to claim 1 , wherein the fastener includes a head adapted to be captured within the ferrule and a stem extending from the head, the stem including an expander section adapted to engage with the expandable part.
10. The screen arrangement according to claim 1 , wherein the stringer includes an elongate plate body having a cut out therein and a perpendicular support plate extending across the cut out, the support plate having the stringer aperture therein.
11. The screen arrangement according to claim 10 , wherein the cut out is shaped to provide clearance between the elongate plate body and the stringer aperture.
12. The screen arrangement according to claim 10 , wherein the perpendicular support plate includes a plurality of sections each including one or more of the stringer apertures.
13. The screen arrangement according to claim 1 , wherein each of the plurality of screen panels includes a plurality of notches that form a corresponding plurality of the screen apertures, and wherein the stringer includes a plurality of stringer apertures.
14. A method of securing a plurality of screen panels to a stringer using a securing arrangement, the method including:
providing a stringer having a stringer aperture that is counter sunk;
resiliently snap fitting a ferrule through the stringer aperture so as to be secured thereto, the ferrule having a chamfered bottom rim to allow resilient compression thereof when fitted through the stringer aperture;
fitting at least two of the plurality of screen panels adjacent one another such that notches at sides thereof define a screen aperture aligned with the ferrule;
fitting a fastener through the screen aperture and the ferrule so as to expand an expandable part that extends from the screen aperture into the stringer aperture thereby coupling the at least two of the plurality of screen panels and the stringer.
15. A stringer arrangement for a screen arrangement, the stringer arrangement including a stringer having an elongate plate body with a plurality of cut outs along a side thereof and one or more support plates arranged perpendicularly to the elongate plate body and along the side to as to extend across the cut outs, wherein the one or more support plates each include one or more stringer apertures each associated with one or more of the plurality of cut outs, wherein the stringer aperture is counter sunk and is fitted with a ferrule including a chamfered bottom rim to allow resilient compression thereof to resiliently snap fit through the stringer aperture so as to be secured thereto.
16. A method of forming a stringer for a screen arrangement, the method including: forming a plurality of cut outs along a side of an elongate plate body; forming one or more support plates arranged to be located across the cut outs, and forming one or more stringer apertures in the one or more support plates so as to be each associated with one or more of the plurality of cut outs, each of the one or more stringer apertures being counter sunk; joining the one or more support plates with the side of an elongate plate body with the one or more support plates being perpendicular to the elongate plate body; and resiliently snap fitting a ferrule with a chamfered bottom rim to allow resilient compression thereof through the stringer aperture so as to be secured thereto.
17. The screen arrangement according to claim 1 , wherein the ferrule includes an annular recess in which the stringer is captured.
18. The screen arrangement according to claim 1 , wherein the ferrule includes a cylindrical body having an aperture to receive the securing arrangement, a top rim fitted adjacent a top surface of the stringer, and an annular recess between the top rim and the bottom rim.
19. The screen arrangement according to claim 18 , wherein the ferrule includes slots extending from the chamfered bottom rim to allow resilient compression when the ferrule is fitted to the stringer aperture with the stringer aperture being captured by the annular recess.