Abstract
A portable safety rail system includes one or more railings inserted into one or more stackable rail bases. Each rail base can include a plurality of apertures for receiving end rail posts of railings through a raised hub defining an open region between the bottom of the hub and the surface on which the rail base rests. Each end rail post can have a stop flange that engages an upper surface of the hub when inserted therein and an aperture through the end portion that extends into the open region beneath the hub for receiving a pin to lock the post while allowing rotation of the post. The system can also include toe boards that are attached to railings with a mount having an aperture through which railings are extended, allowing the toe boards to also be rotated to be aligned with railings.
Claims
1. A portable safety rail system comprising: a railing including an end post that includes a stop flange extending circumferentially proximate a lower end of the end post, the end post defining a pin insertion aperture that extends radially therethrough at a location that is below the stop flange; a rail base comprising: a base portion defining a plane for contacting a surface on which the base portion rests; a hub portion spaced upwardly from the base portion and supported by a plurality of support members extending between the hub portion and the base portion, the hub portion having a plurality of vertically extending post receiving portions, each post receiving portion having an upper end and a lower end and defining an aperture that extends through the hub portion, the lower end of each post receiving portion being elevated relative to the plane to define an open region between the hub portion and the plane, each aperture being sized for receiving the end post; wherein the end post is disposed within a respective one of the plurality of post receiving portions of the hub portion, the position of the stop flange defining an insertion distance of the end post into the hub portion so that the lower end of the end post extends into the open region, the end post being secured to the rail base with a pin that extends through the pin insertion aperture of the end post at a position below the lower end of the respective one of the plurality of post receiving portions of the hub portion, wherein the respective one of the plurality of post receiving portions, the end post, and the pin, when assembled with the pin extending through the end post at the position below the lower end of the respective one of the plurality of post receiving portions, are configured to enable rotation of the end post through 360 degrees of motion about a vertical axis that passes through the respective post receiving portion relative to the rail base.
2. The portable safety rail system of claim 1, wherein the base portion is a circular ring.
3. The portable safety rail system of claim 2, wherein the hub portion defines a circular shape substantially concentric with the circular ring.
4. The portable safety rail system of claim 1, wherein the post receiving portions are disposed above the plurality of support members.
5. The portable safety rail system of claim 1, wherein the hub portion is spaced inwardly from the base portion.
6. The portable safety rail system of claim 1, wherein the plurality of support members and the hub portion are disposed above the base portion such that the base portion is the only portion of the rail base adapted to contact the surface on which the base portion rests.
7. The portable safety rail system of claim 1, wherein the plurality of support members extend upwardly to the hub portion at an acute angle relative to the plane.
8. The portable safety rail system of claim 1, wherein adjacent support members of the plurality of support members define an open gap therebetween for accessing the lower end of the end post within the open region.
9. A method for assembling the portable safety rail system of claim 1, comprising: inserting the end post of the railing into the respective one of the plurality of post receiving portions of the rail base so that the stop flange attached to the end post registers against a top end of the post receiving portion and a portion of the lower end of the end post extends below a bottom end of the post receiving portion, the lower end of the end post extending into the open region; and inserting the pin through the pin insertion aperture of the end post at the position that is below the lower end of the respective one of the plurality of post receiving portions.
10. The method of claim 9, comprising accessing the open region where the portion of the lower end of the end post extends below the bottom end of the post receiving portion through a lateral opening defined by the rail base for the step of inserting a locking pin.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) FIG. 1a is an exploded view of a portable safety rail system according to an embodiment of the present invention.
(2) FIG. 1b is a top view of the portable safety rail system of FIG. 1a.
(3) FIG. 1c is a partial cross-sectional side view of the portable rail safety system of FIG. 1a.
(4) FIG. 2a is a perspective view of a rail base of a portable safety rail system according to an embodiment of the present invention.
(5) FIG. 2b is a top view of the rail base of FIG. 2a.
(6) FIG. 2c is a bottom view of the rail base of FIG. 2a.
(7) FIG. 2d is a cross-sectional view of the rail base of FIG. 2a taken along the lines 2d-2d in FIG. 2c.
(8) FIG. 2e is a cross-sectional view of the rail base of FIG. 2a taken along the lines 2e-2e in FIG. 2c.
(9) FIG. 3a is a side view of a plurality of rail bases of a portable safety rail system according to an embodiment of the present invention.
(10) FIG. 3b is a cross-sectional view of the rail bases of FIG. 3a taken along the lines 3b-3b in FIG. 3a.
(11) FIG. 4a is a side view of a portable safety rail system according to an embodiment of the present invention.
(12) FIG. 4b is a partial perspective view of the portable safety rail system of FIG. 4a.
(13) FIG. 4c is a partial exploded perspective view of the portable safety rail system of FIG. 4a.
(14) FIG. 4d is a partial side view of the portable safety rail system of FIG. 4a.
(15) FIG. 5a is a side view of a portable safety rail system according to an embodiment of the present invention.
(16) FIG. 5b is a top view of the portable safety rail system of FIG. 5a.
(17) FIG. 6a is a top view of a portable safety rail system according to an embodiment of the present invention.
(18) FIG. 6b is a perspective view of the portable safety rail system of FIG. 6a.
(19) FIG. 7 is a side view of a portable safety rail system according to an embodiment of the present invention.
DETAILED DESCRIPTION OF THE DRAWINGS
(20) FIGS. 1a-1c depict the components of a portable safety rail system 100 according to an embodiment of the present invention. Rail system 100 can include a railing 102, a rail base 104, a toe board 106 and a toe board mount 108. As can be seen in the Figures and will be discussed in more detail below, railing 102 can be inserted into rail base 104 and a pin 110 can be inserted into railing 102 to lock the railing 102 against translational movement relative to rail base 104. As is indicated by the arrow in FIG. 1b, railing 102 can be rotated 360 degrees relative to rail base 104 even after the pin 110 is inserted to secure the railing 102 to the rail base 104. Toe board mount 108 is captured between the railing 102 and the rail base 104 at one end and secured to toe board 106 at an opposing end. Rail system 100 complies with all applicable OSHA requirements.
(21) Railing 102 can be formed from a plurality of tubular rails, including vertical end rail posts 112, top rail 114 and one or more support rails 116. In one embodiment, railing 102 is formed from steel. Railing 102 can further include a stop flange 118 along one or both of vertical end rail posts 112 that forms a ledge. In one embodiment, stops configured as stop flanges 118 can be welded onto end rail posts 112. Below stop flange 118, end rail posts 112 of railing 102 can further include a pin insertion aperture 120 extending through end rail post 112. The tubing may generally be steel and the diameter may be 1 inch to 3 inches. Alternatively other metals such as aluminum may be practical. The stops may be welded two to six inches from the tip end 121 of each railing end post.
(22) Referring now to FIGS. 2a-2e, further detail of a rail base 104 according to an embodiment of the present invention can be seen. Rail base 104 can include an outer base portion 122 and a central hub 124 connected by a plurality of support members 126. Post receiving portion configured as a hub 124 can include a plurality of collars 128 defining rail receiving apertures 130 extending through hub 124 and one or more additional apertures 132, each receiving aperture 130 defining a vertical axis 131 that passes through the respective post receiving portion. As can be seen most clearly in FIGS. 2d and 2e, the hub 124 comprising a hub plate 133 including a side edge 135 and a planar lower face 136 that is downward facing, the side edge 135 and receiving apertures 130 being coterminous with the planar lower face 136. The base portion 122 can be adapted to rest on a surface with support members 126 extending at an angle upwardly to hub 124 so that hub 124 is elevated relative to base portion 122 forming an open region 134 between the hub 124 and the surface upon which base portion 122 rests. Open gaps 134a are also present between support members 126 as they extend from base portion 122 to hub 124. In one embodiment, rail bases 104 can be formed from cast iron.
(23) Rail bases 104 can be stacked on top of each other as shown in FIGS. 3a and 3b. Open areas 134 underneath hubs 124 allow adjacent base portions 122 of rail bases 104 to rest on top of each other with collars 128 of a rail base 104 below fitting into open area 134 of a rail base 104 above while also allowing the bottom surface 137 of the base portion 122 of the rail base 104 above to rest flush on the top surface of the base portion 122 of the rail base 104 below. This provides a stable stack that is not prone to tipping and is not possible with standard rail bases that do not incorporate open areas 134. Stably stackable rail bases 104 provide for significantly easier shipment and storage of rail bases 104. Each base has an upper seating surface 135 for receiving the bottom or lower seating surface 137 of another base. For each base the distance d1 between the lower seating surface and upper seating surface defines an effective stacking height and each base has a height d2. The stacking height in particular embodiments is less that 80% of the height, in particular embodiments it is less than 70% of the height and in particular embodiments is less than 60% of the height. The ratio of the stacking height to the height provides a measurement of the nesting of the bases when stacked with the lower the ratio the greater the nesting and correspondingly the greater the stability of the stacked bases.
(24) The bases may be made of cast iron and weigh between 40 pounds and 100 pounds. The bases may have a diameter of from 12 inches to 30 inches.
(25) Referring again to FIGS. 1a-1c and to FIGS. 4a-4d, the details of how components of safety rail system 100 fit together can be seen. Rail engagement portion 138 of toe board mount 108, which has an aperture 140 therethrough, can rest on a collar 128 of rail base 104. End portion 113 of end rail post 112 of railing 102 can be inserted through the aperture 130 through hub 124 at collar 128 (and through aperture 140) until the stop flange 118 of the railing 102 engages the collar 128, capturing the rail engagement portion 138 of the toe board mount therebetween. Stop flange 118 also serves to ensure that the end rail post 112 is not over-inserted and that the aperture 120 through the end rail post 112 is in open region 134. The pin 110 is then inserted through the aperture 120 to secure the railing 102 to the rail base 104. Aperture 120 can be accessed to insert pin 110 due to the open area provided by both open area 134 beneath hub 124 and the gaps 134a between support members 126. Insertion of pin 110 does not require any specific alignment of railing 102 and rail base 104 because the pin 110 only goes through the railing 112 below the hub 124, so the process of insertion and locking is simplified. The toe board 106 is secured to a bracket 142 of toe board mount 108 by, for example, mechanical fasteners either before or after railing 102 is secured to rail base 104. Toe board 106 serves to keep objects from being kicked or otherwise accidentally knocked under the rail system 100, and, in many uses of rail system 100, subsequently off of an elevated surface onto the public or other area below.
(26) The single securing point that constrains the railing 102 translationally but not rotationally relative to the rail base 104 allows the railing 102 to have 360 degrees of rotation relative to the rail base even while they are secured together. This provides simplified adjustment capability relative to the prior art, which requires rotation of the railing prior to securing to the base and alignment of openings in both the railing and the base. In addition, the aperture 140 through rail engagement portion 138 of toe board mount 108 allows toe board mount 108, as well as toe board 106, to similarly be rotated through 360 degrees of rotation. 360 degree positioning provides increased flexibility in assembling portable security rail systems 100, which can be beneficial in adjusting the system to a specific situation, such as assembling the system around obstacles or in a curved manner.
(27) FIGS. 5a-5b depict a portable safety rail system 100 having a plurality of rails 102 and rail bases 104 in a typical usage configuration. Safety rail system 100 is positioned on an elevated surface 10 to prevent people and objects from falling off of a front edge 12 and side edges 14 of surface 10. Rail system 100 is assembled on site and set up to fit the specific geometry of the surface 10. As can be seen in the Figures, the safety rail system 100 configured for this specific surface 10 utilizes five rail bases 104 and four railings 102. System 100 also includes toe boards 106 to prevent objects from rolling off of surface 10. Depending on the positioning of each rail base 104 within system 100, each rail base has one or two, and can have up to four, railings 102 inserting into collars 128 of rail bases. Referring now to FIGS. 6a and 6b, another typical configuration of a portable safety rail system 100 is depicted. In this embodiment, system 100 is used to prevent access to an area 20. System 100 can be advantageously used to provide a barrier for and prevent access to curved and non-uniformally shaped areas due to the ability of railings 102 to be rotated within rail bases 104 through 360 degrees of rotation. In fact, in the hexagonally configured example in FIGS. 6a and 6b, each railing 102 extends from each of its rail bases 104 at a different angle than the adjacent railing 102 that shares the same rail base 104. The toe boards and toe board mounts are illustrated in FIG. 5a connected. In embodiments the portable rail system may include preassembled, such as by welding, toe boards with the toe board mounts already attached.
(28) FIG. 7 depicts a further embodiment of the present invention that includes a gate 150. Gates 150 are useful in situations where selective access to and from the barricaded site is necessary or desired. Advantageously, door 152 of gate 150 can be a standard railing 102 with the same basic structure as all of the other railings 102 in the system, so an additional gate door does not need to be purchased and brought with the system 100 each time it is used. To utilize a railing 102 as a door 152 for a gate 150, the railing 102 is inserted and locked into the collar 128 of a rail base 104 as described previously. A wheel 154 can be attached to the end portion 113 of the opposite end rail post 112 of the railing 102 to aid in opening and closing the gate door 152 and to provide stability to door 152. Due to the ability of railings 102 to be rotated through a 360 range of motion even when locked into place in rail bases 104, gate door 152 can be opened to allow entry or exit through the entire distance between adjacent rail bases 104. A latch stand 158 can be positioned on an adjacent rail base 104 having a first latch portion 160 that cooperates with a second latch portion 156 on door 152 to allow the door 152 to be selectively latched and/or locked. A first leg 162 of latch stand 158 can be inserted into a collar 128 of rail base 104 and locked with a pin similar to how railings 102 are inserted and locked in place. A second leg 164 of latch stand 158 can be inserted into an additional aperture 132 positioned in rail base 104, as, for example can be best seen in FIGS. 2b and 2c. By inserting the second leg 164 into the aperture 132, the latch stand 158 is prevented from rotating, allowing the latch stand 158 to provide a stable latching source for the gate door 152.
(29) The present invention may be embodied in other specific forms without departing from the spirit of any of the essential attributes thereof. Therefore, the illustrated embodiments should be considered in all respects as illustrative and not restrictive, reference being made to the appended claims rather than to the foregoing description to indicate the scope of the invention.
