Structural post assembly for thermoplastic railing system
These and other objects of the present invention are accomplished by a structural post assembly for a thermoplastic railing system in which a tubular metal support column is secured to the substrate upon which thermoplastic railing system is mounted by means of a base plate, the support column being internally threaded at its upper end, a slidably rotatable base rail connector of one piece construction having a segmented cylindrical core defining an aperture is slidably receivable over the support column and positioned at the lower end proximate the base plate thereof, and an adjustable upper rail connector generally cubic in shape positioned proximate the upper end of the metal support column, the adjustable upper rail connector and base connector adjustable for the slidable receipt of a thermoplastic sheath, the thermoplastic sheath being locked in position by a threaded fastener through the adjustable upper rail connector and into the internally threaded aperture of the support column thereby fixing the vertical support member for the thermoplastic railing system in the correct horizontal and vertical orientation for geometrical symmetry of the railing system.
Applicant claims the benefit of provisional application Ser. No. 60/613,046, filed Sep. 27, 2004.
BACKGROUND OF THE INVENTION1. Field of the Invention
The present invention relates to thermo plastic rail systems, and more particularly, to a support post assembly for thermoplastic rail systems in which the vertical support posts are square in cross section.
2. Description of the Prior Art
Railing systems serve the purpose of guard rails, hand rails, grab rails, and in many instances serve as area dividers. Railings have long been used for a variety of applications such as stairways, balconies, patios and decks, industrial buildings, playgrounds and schools, as well as many other wide variety of uses. These uses are both indoors and outdoors.
Building codes require the use of high strength material, such as iron, steel, aluminum wrap or the like to provide sufficient rigidity and strength to insure adequate safety and security qualities depending upon the location and purpose of the railing systems. Thermoplastic railing systems have become popular due to certain intrinsic qualities. In order to meet building codes, thermoplastic railing sytems typically include a plurality of vertical posts which are mounted or secured to a substrate, base or decking member. These vertical posts are reinforced from within in order to meet the necessary rigidity and strength requirements.
The vertical support posts interconnect with one or more horizontal rails which in turn may have vertical balusters or other infill materials such as glass, etc., extending there between. Usually both of the horizontal rails include a support insert secured to the vertical support post in order to provide the necessary rigidity. For an explanation of thermoplastic tubular support posts which are circular in cross section, see Applicant's issued U.S. Pat. No. 6,203,233 issued Mar. 20, 2001.
One particular problem encountered with respect to thermoplastic support railings occurs when it is desired that the support railing be square or rectangular in cross section thereby mimicking a typical wooden railing which one might find on their back yard deck or patio. Numerous companies originally made their own plastic sheathing or sleeve members designed to over fit the wood support post, wooden railings and wooden balusters in order to protect the underlying wood from the effect of weather and climate. However, such thermoplastic railing systems must still rely upon the underlying wooden railing structure for the necessary strength and rigidity. The industry and market place would prefer a method or means of strengthening hollow thermoplastic posts without the need of the underlying wood post.
Attempts to overcome this problem have resulted in sheathing the vertical post support and the uppermost horizontal rail member in which the core would remain wood and the remaining horizontal rails and balusters would be constructed of tubular rail and balusters of a square or rectangular hollow cross section. This solution still requires the installation and sheathing of a vertical support post at certain incremental distances along the area to be railed, each of these vertical support posts normally being dimensions four inches by four inches on each side.
The necessity of maintaining the underlying four by four vertical posts makes the installation of a thermoplastic rail system both expensive and time consuming in that each individual vertical post must be individually sheathed and can present difficulties in alignment and the ultimate geometric symmetry of the railing system.
The sheathing difficulties and geometric symmetry arise because not every four by four vertical support post is exactly dimensioned and since the thermoplastic sheathing is prefabricated, its inner dimensions, which must conform to the outer dimensions of the vertical support posts are often incorrect as a result of the tolerances in fabrication, thus requiring remedial work at the installation site in order to effectuate a proper installation and geometric symmetry.
Applicant has developed a structural post assembly for utilization with a thermoplastic railing system which is square or rectangular in cross section which eliminates the need for a solid vertical wooden support post and provides for a tubular metal support post secured to the substrate of the railing system, the tubular metal support post supporting spaced apart tubular engagement members which are adjustable to the inner diameter of the thermoplastic railing system and which allow for the thermoplastic sheathing of the vertical support posts to be adjusted and secured in situ at the installation site to achieve proper vertical and horizontal orientation and geometrical symmetry and to allow the thermoplastic sheathing of the vertical support post to be secured to the these connectors with the concomitant intermediate horizontal rails connected and secured to the thermoplastic sheathing and the vertical balusters secured to the horizontal rails.
OBJECTS OF THE INVENTIONAn object of the invention is to provide for a novel structural support post for a thermoplastic railing system in which the cross section of the thermoplastic railing system is square or rectangular.
Another object of the present invention is to provide for a novel structural post assembly for a thermoplastic rail system which eliminates the need for a continuous, fixed solid vertical support post underlying the thermoplastic sheathing of the rail system.
A still further object of the present invention is to provide for a novel support post assembly for a thermoplastic railing system in which the structural post assembly provides for internal connectors which allow the installers to adjust the vertical and horizontal orientation and geometric symmetry at the installation site with little modification to the underlying support or thermoplastic sheathing.
A still further object of the present invention is to provide for a novel structural post assembly for thermoplastic rail system in which the inner support connectors for the thermoplastic sheathing are adjustable to accommodate minor differentials in the actual internal diameter of the thermoplastic sheathing.
SUMMARY OF THE INVENTIONThese and other objects of the present invention are accomplished by a structural post assembly for a thermoplastic railing system in which a tubular metal support column is secured to the substrate upon which thermoplastic railing system is mounted by means of a base plate, the support column being internally threaded at its upper end, a slidably rotatable base rail connector of one piece construction having a segmented cylindrical core defining an aperture is slidably receivable over the support column and positioned at the lower end proximate the base plate thereof, and an adjustable upper rail connector generally cubic in shape positioned proximate the upper end of the metal support column, the adjustable upper rail connector and base connector adjustable for the slidable receipt of a thermoplastic sheath, the thermoplastic sheath being locked in position by a threaded fastener through the adjustable upper rail connector and into the internally threaded aperture of the support column thereby fixing the vertical support member for the thermoplastic railing system in the correct horizontal and vertical orientation for geometrical symmetry of the railing system.
BRIEF DESCRIPTION OF THE DRAWINGSThese and other objects of the present invention will become apparent, particularly when taken in light of the following illustrations wherein:
Railings of the type illustrated in
The wood construction, even if treated, suffers deterioration from the climate. Periodic treatment of the lumber would reduce or delay the deterioration, but other solutions have been explored. One such solution was to sheath the lumber or wood in a thermoplastic sleeve 22 (See
While the sheathing method provided a solution to the problem, it raised additional problems in the field in the installation in that there are many manufacturers of the thermoplastic tubing or railing. Not all of their inner diameters were of a tolerance sufficient to accept the underlying vertical support post four by four in a tight fitting manner. Still further, when utilizing a solid vertical support post of wood or lumber, of the four by four variety, it was often difficult with the sheathing solution to achieve the proper orientation of the vertical support post such that a geometric symmetry could be achieved in the resultant railing system.
Slidably receivable onto vertical tubular support post 38 is a slidable, rotatable base rail connector 48, preferably of one piece construction (see
The distance from each adjacent corner 56 of the base rail connector 48 approximates the side distance on a standard wooden post four by four. The problem with sheathing or encapsulating a standard wooden four by four support post is the fact that often times the inner diameter of the thermoplastic sheathing or sleeve was not of sufficient tolerance to exactly match the outer diameter dimensions of the vertical wooden support posts. Applicant's base rail connector 48 with segmented cylindrical core 50 allows for some tolerance give and flex of radiating arms 54 when sliding the thermoplastic sleeve over the base rail connector 48 thus allowing the base rail connector 48 to adapt to different types of thermoplastic sleeves and the interior tolerance dimensions with which they were fabricated.
At the upper end of the tubular support post 38 there would be positioned an adjustable upper rail connector 70 (See
In this configuration (See
The linear dimensions of the upper rail connector blocks 92 and 94 approximate the inner dimensions of the side walls of the thermoplastic sheathing 22. In this configuration, blocks 92 and 94 can be adjusted independently in order to achieve the correct horizontal and vertical orientation of the thermoplastic sheathing 22 when thermoplastic sheathing 22 is slidably received onto the support post assembly 30. Once the installer has determined that the correct vertical, horizontal and geometric orientation has been achieved, the fastening means 46 would be threaded firmly into the threaded aperture 44 at the upper end of support column 38. In this embodiment, as with the first embodiment, a suitable, aesthetic cap 39 member would be secured to the sheath column in order to cover the fastener means 46.
In both embodiments of the support post assembly, the horizontal railings 18 and balusters 20 would be secured to the sheath spaced apart support post assemblies in conventional manner.
Adjustable upper rail connector 170 also has an additional feature in that one of the walls forming the segmented cylindrical core is formed with a vertical slot 180. The building codes in various jurisdictions dictate the required height of a railing system depending upon its use. In many jurisdictions, the building codes have specified a residential railing system with a height of 36 inches and in commercial installations require a railing system with a height of 42 inches. By adjusting the height of adjustable upper rail connector 170 and the length of slot 180, an installer can use a standardized length of metal support post 38 for either commercial or residential installations. The additional height for a commercial installation is achieved by a threaded fastener 182 and cooperative threaded aperture 184 in the metal support post 38. Threaded fastener 182 fits into slot 180 on adjustable upper rail connector 170 and can be tightened down to secure the height at which adjustable upper rail connector 170 is positioned. If additional height is required for a commercial installation, the threaded fastener 180 is loosened, adjustable upper rail connector 170 is slid upwardly to achieve the required height and the threaded fastener 180 is retightened to secure adjustable upper rail connector 170 at this increased height position.
Washers 192 and 194 are utilized in this particular assembly because of the unique shape of the upper surface of the adjustable upper rail connector 270 so there is achielved sufficient contact surface area with the upper surface to maintain it in position once the threaded faster 46 is fully threaded downwardly into the aperture 44 formed in support member 38.
While the present invention has been described with respect to the exemplary embodiments thereof, it will be recognized by those of ordinary skill in the art that many modifications or changes can be achieved without departing from the spirit and scope of the invention. Therefore it is manifestly intended that the invention be limited only by the scope of the claims and the equivalence thereof.
Claims
1. A structural support post assembly for thermoplastic railing systems of the type having a plurality of vertical support posts having horizontal rails there between said rails having a plurality of vertical balusters secured thereto, said structural support post assembly comprising:
- a base member secured to a substrate, said base member having a centrally disposed aperture therethrough;
- a support pole, cylindrical in cross sectional area, having a lower end and an upper end, said lower end receivable and securable within said aperture of said base plate;
- an adjustable base rail connector slidably receivable on said support post and positionable proximate said lower end of said support post, said base rail connector defined by a segmented cylindrical core having four outward corner projections in 90 degree flexed relationship to each adjacent corner projection, each projection defining a corner, defined by adjacent planar vertical surfaces, the cross section of said base rail connector defined by said corner projections equaling the interior cross section of a thermoplastic support post sleeve slidably engageable over said base rail connector;
- an adjustable upper rail connector securable on said upper end of said support post, said upper rail connector for the slidable receipt within a thermoplastic support post sleeve, said base rail connector and said upper rail connector allowing for the correct orientation and squaring of the thermoplastic support post sleeve before the connection of horizontal rails of said thermoplastic railing system.
2. The structural support post assembly for a thermoplastic railing system in accordance with claim 1 wherein said base rail connector and said upper rail connector are identical.
3. The structural support post assembly for a thermoplastic railing system in accordance with claim 2 wherein said base rail connector and said upper rail connector are each constructed of unitary construction of molded or extruded polymer and comprises a segmented cylindrical core defining a central aperture which is securable on said support post there being four radiating projections radiating outwardly from said segmented cylindrical core in 90 degree flexed relationship to each adjacent projection, each of said radiating projections defining a corner with adjacent planar vertical surfaces and defining a gap between each adjacent corner, the segmented cylindrical core and said radiating projections provide tolerance and flexure for receipt of said thermoplastic support post sleeve for the orientation and squaring of the sleeve prior to the attachment of said rails of said railing system.
4. The structural support post assembly for thermoplastic railing systems in accordance with claim 3 wherein said upper rail connector is formed with a vertical slot in a wall of said segmented cylindrical core, said vertical slot cooperable with an aperture formed in said support post so as to permit the vertical slidable adjustment of the upper rail connector and the support post and to secure the upper rail connector in position by means of a fastener means cooperable with said slot and said aperture in said support post.
5. The structural support post assembly for thermoplastic railing systems in accordance with claim 1 wherein said support pole is formed with a threaded bore on its upper end, said threaded bore in axial alignment with said support pole.
6. The structural support post assembly for thermoplastic railing systems in accordance with claim 5 wherein said upper rail connector is secured on said upper end of said support pole by means of a plurality of washers alignable with said segmented cylindrical core and a threaded fastener means passing through said plurality of washers and said segmented cylindrical core into said threaded bore securing said upper rail connector to said support post.
7. The structural support post assembly for thermoplastic railing systems in accordance with claim 5 wherein said upper rail connector comprises a rectangular block member having a longitudinal slot, said rectangular block member positioned on top of said support post, and secured thereto by a threaded fastener passing through said longitudinal slot into said threaded bore, said rectangular member having at least one dimension equal to the interior width of said thermoplastic support post sleeve, said rectangular member adjustable on said support post by means of said longitudinal slot so as to obtain correct orientation and squaring of said thermoplastic support post sleeve before connection of said horizontal rails of said thermoplastic railing system.
8. The structural support post assembly for thermoplastic railing systems in accordance with claim 5 wherein said upper rail connector comprises two rectangular block members each having a longitudinal slot there through, said two rectangular members secured to said upper end of said support pole by means of a threaded fastener passing through said longitudinal slots and into said threaded bore, said two rectangular members being oriented perpendicular to each other, each of said rectangular members having a dimension equal to the width of the interior cross section of said thermoplastic support post sleeve, said two rectangular members adjustable with respect to each other in order to correctly orient and square said thermoplastic support post sleeve before connection of said horizontal rails of said thermoplastic railing system.
9. A method of installation for a structural support post assembly for thermoplastic railing systems of the type having a plurality of vertical support posts having horizontal rails there between, said horizontal rails having a plurality of vertical balusters secured thereto, said method of installing said structural support post assembly comprising:
- a. securing a base plate member to a substrate, said base plate member having a centrally disposed aperture there through;
- b. positioning a vertical support pole having a lower end and an upper end, cylindrical in cross section into said aperture in said base member and securing said vertical support pole thereto;
- c. slidably positioning an adjustable base rail connector onto said support pole and positioning said adjustable base rail connector proximate said lower end of said support pole, said adjustable base rail connector defined by a segmented cylindrical core having four outward corner projections in 90 degree flex relationship to each adjacent corner projection, each projection defining a corner, defined by adjacent planar vertical surfaces, the cross section of said base rail connector defined by said corner projections and equaling the interior cross section of a thermoplastic support post sleeve slidably engagable over said base rail connector;
- d. positioning an upper rail connector securable on said upper end of said support pole, said upper rail connector for slidable receipt within said thermoplastic support post sleeve;
- e. slidably positioning said thermoplastic support post sleeve over said upper rail connector, said lower rail connector, and said support post;
- f. adjusting said thermoplastic support post sleeve utilizing said adjustable base rail connector and said adjustable upper rail connector to achieve the correct orientation and squaring of said thermoplastic support post sleeve;
- g. securing said upper rail connector to said support post;
- h. repeating steps a through g for an adjacent structural support post;
- i. securing said horizontal rails between said adjacent thermoplastic support post sleeves by securing said rails to said adjustable base rail connector and said adjustable upper rail connector; and
- j. repeating steps a through i to complete construction of said thermoplastic railing system.
Type: Application
Filed: Sep 12, 2005
Publication Date: Mar 30, 2006
Inventor: Larry Stanley (Toms River, NJ)
Application Number: 11/223,867
International Classification: E04H 17/14 (20060101);