Patent Application
20120102848
The present invention resides in the field of metal fascia dimensioned and configured to overlie the roof edge of a built-up or flat roof. The apparatus may be described as a base plate having a shorter portion for lying atop the roof edge and a longer portion at right angles to the first portion for overlying the upper sidewall and being attached thereto by the use of threaded fasteners through a series of holes perforating the longer portion. A cover fascia plate is attached to flanges at the upper and lower portions of the base plate and held at tension upward and outward from the base plate by a spring clip uniquely positioned between the base plate and the fascia cover.
Large rubber membranes and the like are commonly used for covering a roof such as a flat roof. The membrane is laid over the surface of the roof and secured in place by adhesive and/or mechanical fastening means. A number of prior mechanisms have been developed for securing the edges of a rubber roof membrane in place along the edge of the roof in order to maintain the roofing membrane in position in proximate contact with the underlying roofing support surface. In some applications the rubber membrane may be subjected to significant wind forces causing the rubber membrane to tend to pull away from the surface of the roof. The edge of the roof is especially susceptible to damage from wind shear forces, and, if the edge of a rubber roof membrane were to become detached from the roof, all or a substantial portion of the membrane may be blown off. Moreover, damage often occurs from water entering the building structure, for example by flowing over the edge of the roof and down an outside wall where it may enter the structure and cause damage to the building.
Generally, an upwardly extending water dam is mounted at the edge of the roof and a fascia is mounted over the water dam. The fascia generally also extends downward, parallel to the outside wall of the building. The fascia improves the appearance of the roof edge and further increases resistance to wind-driven rain and wind uplift loads along the roof edge. Unfortunately, existing systems often require non-standard water dams and/or edge fascia which are comprised of a number of complicated parts that are difficult and time consuming to install.
One generally accepted roof edge systems are described in U.S. Pat. Nos. 6,912,814 and 7,451,572 [Inzeo, et al.] that shows a roof edge clamping system for overlying the roofing membrane, clamping it down and providing a metal fascia at the roof edge to hide the bolts and plates of the clamping members. This system relies entirely upon fasteners to retain the cover in position and does not protect for the vertical penetration of water behind the fascia.
Another system, one that utilizes a type of spring clip to force the roof edge metal fascia upward, is described in U.S. Pat. No. 6,578,322 [Kintop]. This system requires both a catch and the spring clip to operate properly and maintain the fascia in the required position. This system is complex to manufacture and just as complex to install on a rooftop. Based upon the number of metal plates, the required bends and folds, and the interrelationships of the various plates and folds, the complex system requires particular attention to positioning on installation. The cover overlying the fastener holding the spring clip in place suffers from the probability of releasing from wind shear along the roof surface without another fastener holding it in position.
Still another edge fascia system using a spring clip is described in U.S. Pat. No. 5,927,023 [Kittilstad]. The Kittilstad system also depends upon a spring clip positioned between the top outward facing corner of the cover and a ridge formed along the inner rear side of the base over which the outer cover plate also fits. This system is subject to probable failure in the event that there is sufficient wind lift and the cover plate lifts away from the base plate ridge or if the cover plate is subjected to sufficient distortion due to damage or careless placement of ladders or walking along the roof edge.
The two roof edge systems using the spring clip both rely upon the cover plate fitting over and holding the spring clip in place. However, the cover plate is not held down and is the second piece of metal curling around or over a raised portion of the base plate that is the sole retaining mechanism for the cover along the entire expanse of the roof edge system. This type of system suffers from the deficiencies noted above with neither system taking full advantage of a spring clip that force the cover plate away from the base plate when fully assembled.
It is, therefore, an object of the present invention to overcome the previous deficiencies by using a differently positioned spring clip that forces the parts of the roof edge system away from each other, and then retains those parts in that orientation. It is a further object of the present invention to reduce the required time to install the spring clip type roof edge systems by housing the spring clip in a different fold or retaining space that that over which the cover plate is placed. It is yet an additional object to provide a spring clip that produces sufficient upward force to retain the top outer edge of the cover at its farthest outward and upward extent at all times, once fully installed. It is a still further object of the present invention to reduce the time and complexity of installation of the roof edge fascia system through the reconfiguring of the attachment points for the spring clip and cover plate. Other objects will appear hereinafter.
The present invention provides a superior roof edge fascia system for securing the periphery of a membrane to the edge of a roof so that the membrane remains securely fastened to and against the surface of the roof and will not pull up as a result of wind forces on the membrane. Specifically, the present invention provides a base plate having a shorter portion for lying atop the roof edge and a longer portion at right angles to the first portion for overlying the upper sidewall and being attached thereto by the use of threaded fasteners through a series of holes perforating the longer portion. The shorter portion of the base plate has, at its distal end, a pocket formed from overfolding the edge of the distal end at the uppermost region of an upstanding end portion of the base plate creating an upwardly distanced spacing away from the roofing system. The pocket is formed by the overlying of the edge turned inward and against the inner upper wall of the pocket, but only partially along the pocket depth. The pocket is dimensioned to receive a spring clip that is specially bent or folded at desired spacings so as to fit within the pocket and extend outward and upward to contact the inner side of the fascia cover plate at the approximate 90° fold point at the juncture of the horizontal and vertical legs of the cover supporting it in general parallelity to the base plate in both dimensional directions.
At the distal end of the longer portion of the base plate an outwardly angled edge is formed for attaching the other end of the cover plate. The cover plate is dimensioned slightly larger than the base plate with a 90° bend between its shorter and longer portions approximating the same lengths from the bend in the base plate for each of the portions of the cover plate. The cover plate is held in position by bent edges that overlie the lower outwardly angled edge of the base plate and the inward facing edge of the pocket at the distal edge of the shorter portion of the base plate and supported in position by the properly positioned and located spring clip mounted within the pocket.
Within the open space created by the pocket located at the shorter end edge of the base plate, and in order to maintain tension between the base and cover plates when mounted by exerting a force upward and outward from the 90° bend in the base plate to retain the cover plate in an extended support relationship, a plurality of spring clips are placed at predetermined locations along the extent of the fascia cover and base plates. The spring clip is formed in a relaxed S-shape with an elongated lower end extending and pushing into the formed pocket in the space remaining in the pocket depth beyond the reinforcing overfold of the end edge. The elongated lower end of the spring clip has a series of partial punched outward extensions such that as the end is inserted into the pocket of the base plate the spring clip is retained in position within the pocket so that it will extend forward, upward and outward to provide support for the interior of the bend in the cover plate. The spring clip, at its first bend, leaves the pocket and extends downward to the top of the base plate contacting the base plate approximately midway along the shorter portion. A second bend extends the spring clip upward toward the interior of the cover plate, but short of the inner side of the cover a reinforcing bend extends the spring clip outward toward the corner of the cover plate. A fourth bend in the spring clip contacts the interior of the cover plate at approximately an equidistant point on either side of the 90° bend to the distal end of the spring clip on the other side of the 90° bend. The spread of the two contact points add strength by providing a greater space between contact points and the contact point of the spring clip against the top side of the base plate provides a more stable support for the cover fascia corner while remaining unmovingly anchored in the pocket.
The cover plate is mounted over the base plate and spring clip by engaging its lower portion bent edge over the lower portion outward angled edge of the base plate and then pushing the spring clip rearward into the pocket of the base plate the second bent edge of the cover plate is engaged with the upward angled edge of the base plate by slipping the edges over one another compressing the spring clip, and then permitting the spring clip to expand and force the cover plate outward away from the base plate retaining both edges in engagement. The foregoing and other features of the invention are hereinafter fully described and particularly pointed out in the claims, the following description and drawings setting forth by way of illustration and example the preferred embodiments of this invention.
For the purpose of illustrating the invention, there is shown in the drawings forms which are presently preferred; it being understood, however, that the invention is not limited to the precise arrangements and instrumentalities shown.
The following detailed description is of the best presently contemplated mode of carrying out the invention. The description is not intended in a limiting sense, and is made solely for the purpose of illustrating the general principles of the invention. The various features and advantages of the present invention may be more readily understood with reference to the following detailed description taken in conjunction with the accompanying drawings.
With reference now to the drawing figures in which like-reference numerals designate like parts throughout the disclosure, the fascia assembly system of the present invention is illustrated generally at 10 in
Referring to
The shorter portion 19a of the base plate 16 has, at its distal end, an upwardly extending flange 20 with a horizontally oriented pocket 21 at its uppermost extent. In the example shown, the pocket 21 is positioned entirely inward away from the wall 11, but the pocket 21 may be made to be closer to the wall 11 so long as there remains an inward facing bend 23 over which the cover plate 14 can be placed.
The pocket 21 is formed by bending the upward extending flange 20 such that a lower first section extends away from the junction of the shorter and longer portions 19a, 19b, respectively, of the base plate at the 90° bend 19c. The flange is then folded back over itself to form equal length portions with the inward edge of the overfolded section forming an edge within the pocket 21. The overfolded edge extends partway back into the fold as both a reinforcement against the expansion of the pocket 21 and to serve as a block against the easy removal of the spring clip 12 once inserted into the pocket 21. The pocket 21 is finally formed by folding the reinforced edge downward over the lower section with the pocket opening facing toward the base plate junction 19c. In this manner the pocket 21 is formed by folding the inward facing edge of the base plate 16 and creating an upward spacing by means of flange 20 away from the shorter portion 19a of the base plate and the membrane 13 of the roofing system to create a separation for the spring clip 12 of the present edge fascia system and to accommodate a location for the attachment of cover plate 14.
The pocket 21 is dimensioned to receive the spring clip 12 that is specially bent or folded at desired spacings, to be described more fully below, so as to fit within the pocket and extend outward and upward to contact the inner side of the fascia cover plate 14 at the approximate 90° fold point at the juncture of the horizontal and vertical legs of the cover plate 14 supporting it in general parallelity to the base plate 16 in both horizontal and vertical dimensional directions. In this way the properly positioned and located spring clip 12, with one end mounted within the pocket 21, retains the cover plate 14 in position away from the base plate 16 as described more fully below.
At the distal end of the longer portion 19b of the base plate 16 an outwardly angled edge 23 is formed for attaching the lower end 24 of the cover plate 14. The cover plate 14 is dimensioned slightly larger than the base plate 16 with a 90° bend between its shorter and longer portions approximating the same lengths from the bend in the base plate 16 for each of the portions of the cover plate 14. The cover plate is held in position by bent edges 24, 26 that overlie the lower outwardly angled edge 23 of the base plate 16 and the rearward facing bend 25 of the pocket 21 at the distal edge of the shorter portion 19a of the base plate 16, respectively. The bent edge 26 of the cover plate 14 has sufficient length to extend completely over the bend 25 and extend farther downward toward the roof membrane 13 within the space afforded outside the flange 20.
Within the open space that is created the cover plate 14 and the base plate 16, and in order to maintain tension between the cover and base plates 14, 16 when mounted by exerting a force upward and outward from the 90° bend in the base plate 19c to retain the cover plate 14 in an extended support relationship, a plurality of spring clips 12 are placed at predetermined locations along the extent of the fascia cover and base plates 14, 16. The spring clip 12 is formed in a relaxed S-shape with an elongated first end 30 extending and pushing into the formed pocket 21 in the space remaining in the pocket depth beyond the reinforcing overfold of the end edge. The elongated first end 30 of the spring clip 12 has a series of partial punched outward extensions 28 such that as the end of the spring clip 12 is inserted into the pocket 21 located at the distal end of the shorter portion 19a of the base plate 16 the spring clip 12 is retained in position within the pocket 21 by the punched extensions 28 engaging the overfolded edge 29 of the pocket 21. The engaging of the punched extensions 28 with the overfolded edge 29 locks the spring clip 12 in position so that it will extend forward, upward and outward to provide support for the interior of the corner bend of the cover plate 14.
With reference to
Referring again to
The cover plate 14 is dimensioned slightly larger than the base plate 16 with a 90° bend between its shorter and longer portions 19a, 19b approximating the same lengths from the bend in the base plate 16 for each of the portions of the cover plate 14. Within the space 18 created between the cover plate 14 and the base plate 16 the spring clip 12 extends as described above from the pocket 21 toward the fascia corner 14c of the cover plate 14 exerting a force upward and outward from its fulcrum point 33 along the base plate 16 to retain the cover plate 14 in an extended tensioned spatial relationship.
Referring now to
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof and, accordingly, the described embodiments are to be considered in all respects as being illustrative and not restrictive, with the scope of the invention being indicated by the appended claims, rather than the foregoing detailed description, as indicating the scope of the invention as well as all modifications which may fall within a range of equivalency which are also intended to be embraced therein.
