Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
  • E04F11/02—Stairways; Layouts thereof
  • E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
  • E04F11/025—Stairways having stringers
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
  • E04F11/02—Stairways; Layouts thereof
  • E04F11/104—Treads
  • E04F11/108—Treads of wood or with an upper layer of wood

Definitions

• the present invention concerns a prefabricated staircase and finishing plate arrangement therefore and method for installing same.
• An advantage of the present invention is that the staircase and finishing plates therefor are prefabricated, thus reducing manual labour required for cutting and fixing the staircase frame and the finishing plates.
• Another advantage of the present invention is that the staircase frame and plates are easily installed, with a minimum of tools.
• Another advantage of the present invention is that the plates are pre-sized to the correct size and shape for fitting to the prefabricated staircase frame, thus reducing risk of errors and damage.
• Still another advantage of the present invention is that the staircase frame and plates may be installed in less time than for conventional plates and staircases.
• a further advantage of the present invention is that the finishing plate arrangement for covering a plurality of adjacent steps of a prefabricated staircase frame can be preassembled, or factory assembled, to improve assembly quality and reduce cost thereof, since the dimensions of the prefabricated staircase frame are well known.
• the present invention provides a staircase finishing kit for installation over at least a portion of a prefabricated staircase frame having at least one vertical riser, at least one horizontal tread, the frame being connectable at opposing frame ends thereof to first and second floor structures of a building with the frame extending therebetween, the kit comprising: - at least one prefabricated finished stringer plate having, for each tread, a respective horizontal plate edge in horizontal register therewith, and for each riser a respective vertical plate edge in vertical register therewith; - for each riser, a respective prefabricated finished riser plate connectable to the at least one stringer plate to cover a respective riser with a top vertical plate edge of the riser plate in vertical register with an adjacent tread and the respective horizontal plate edge therefore and intersecting an adjacent vertical plate edge to form a riser corner therewith; and
• a prefabricated finished tread plate having a decorative nosing extending along at least a front edge thereof and having a lip for abutment against the adjacent riser plate, the tread plate being connectable to the at least one stringer plate by intersecting an adjacent horizontal plate edge and to an adjacent riser plate with the tread plate abuttingly covering a respective tread.
• each vertical plate edge from at least one stringer plate is longitudinally mitred for intersection with a mitred lateral edge of a respective said riser plates to form a riser corner therewith.
• Each vertical plate edge and corresponding lateral edge have respective slots extending at least partially therealong and in register with one another for simultaneously receiving a securing member therein thereby securing the riser plate to the stringer plate.
• each horizontal plate edge of said at least one stringer plate extends inwardly from a superjacent vertical plate edge to allow the respective tread plate to intersect said superjacent vertical plate edge and have the respective tread plate locally sandwiched between the stringer plate and the corresponding superjacent riser plate.
• the finishing kit is factory assembled and covers a plurality of steps of the prefabricated staircase.
• Another aspect of the invention comprises the prefabricated staircase frame in addition to staircase finishing kit in accordance with the first aspect of the invention.
• the decorative nosing includes a plurality of spaced apart spike members extending horizontally inwardly beneath the tread plate from the lip thereof, the tread plate being connectable to an adjacent riser with the tread plate abuttingly covering the tread by insertion of the spike members through the adjacent riser plate and into the adjacent riser with the lip abutting against the adjacent riser plate.
• a staircase comprising:
• a prefabricated staircase frame having at least one vertical riser, at least one horizontal tread, and at least one stringer board to which each riser and each tread is connected, the frame being connectable at opposing frame ends thereof to first and second floor structures of a building with the frame extending therebetween;
• At least one prefabricated finished stringer plate having, for each tread, a respective horizontal plate edge, and for each riser a respective vertical plate edge, the stringer plate being connectable to the stringer board to abuttingly cover the stringer board with each respective horizontal plate edge in horizontal register with the respective tread and with each respective vertical plate edge in vertical register with the respective riser;
• a respective prefabricated finished riser plate connectable to the riser to cover the riser with a top vertical plate edge of the riser plate in vertical register with an adjacent tread and the respective horizontal plate edge therefore and intersecting an adjacent vertical plate edge to form a riser corner therewith;
• a prefabricated finished tread plate having a decorative nosing extending along at least a front edge thereof, the tread plate being connectable to an adjacent riser plate with the tread plate abuttingly covering the tread by abutment against the adjacent riser plate with a lip of the nosing.
• the at least one preassembled finishing plate arrangement includes at least one prefabricated finished stringer plate, at least one prefabricated finished riser plate and at least one prefabricated finished tread plate
• the step of connecting the at least one preassembled finishing plate arrangement includes: after connecting the generally opposed frame ends, for each stringer board, connecting a respective prefabricated finished stringer plate therefor to the stringer board to cover the stringer board with, for each tread, a respective horizontal plate edge of the stringer board in horizontal register with the tread, and, for each riser, a respective vertical plate edge in vertical register with the riser;
• each stringer plate for each riser, connecting a respective prefabricated finished riser plate to abuttingly cover the riser with a top horizontal edge of the riser plate in horizontal register with an adjacent tread and the respective horizontal plate edge therefor and intersecting an adjacent vertical plate edge to form a riser corner therewith; and after connecting a respective prefabricated riser plate, for each tread, connecting a prefabricated finished tread plate, having a decorative nosing forming at least a front edge thereof, to an adjacent riser plate with the tread plate abuttingly covering the tread by abutment against the adjacent riser plate with a lip of the nosing and with tread plate side edges of the tread plate in register with the horizontal plate register.
• the decorative nosing includes a plurality of spaced apart spike members extending horizontally inwardly beneath the tread plate from the lip thereof, and wherein the step of connecting a prefabricated finished tread plate includes connecting a prefabricated finished tread plate to an adjacent riser with the tread plate abuttingly covering the tread by insertion of the spike members through the adjacent riser plate and into the adjacent riser with the lip abutting against the adjacent riser plate.
• At least one said vertical plate edge from at least one said stringer plate is longitudinally mitred for intersection with a mitred lateral edge of a respective said riser plates to form a riser corner therewith, and said mitred vertical plate edge and said mitred lateral edge have respective slots extending at least partially therealong and in register with one another, and wherein the step of connecting a respective prefabricated finished riser plate includes securing the riser plate to the stringer plate by slidably and simultaneously inserting a securing member into said mitred vertical plate edge and corresponding said mitred lateral edge.
• the or each stringer board may conveniently be provided with preformed registration points for matching with suitably positioned registration points preformed on the prefabricated stringer plate, for the purpose of aligning the plate with the board and for applying appropriate fixtures for securement of the plate to the board.
• dowel holes may be predrilled in both the plate and the board and dowels are used in the aligned holes to connect the plate to the board.
• Additional fixtures may be applied to secure the finishing stringer plate to the staircase and in particular may be in the form of angled screws extending from the treads through the stringer board and thence into the stringer plate when in cladding position in relation thereto.
• the pocket holes for the screws will be predrilled and accurately positioned for correct fastening into the stringer plate without piercing its decorative surface.
• jigs will typically be used to generate the fixing holes so that standardized dimensional interrelationships between the various elements of the staircase can be established to facilitate assembly.
• fixtures may be provided at the mitred juncture between the stringer plate and the final finishing riser plate at the foot of the staircase.
• Such fixtures may be in the form of Chinese nails extending between the plates within aligned registration slots at the mitre.
• Figure 1 is a top perspective view of a staircase incorporating a finishing plate arrangement in accordance with an embodiment of the present invention
• Figure 2 is a top perspective view similar to Figure 1 , showing the staircase of Figure 1 with the finishing plate arrangement shown in exploded view above the pref a bri cated sta i rcase f ra m e ;
• Figure 3 is an exploded plan view of a detail of a fixture shown in Figure 1 ;
• Figure 4 is a perspective view of the detail of the fixture of Figure 3 showing the fixture aligned for application;
• Figure 5 is a scrap underside view of the staircase showing the mounting thereof to a floor structure of a building;
• Figure 6 is a top perspective exploded view of a staircase incorporating a finishing plate arrangement in accordance with another embodiment of the present invention, with the finishing plates being preassembled together prior to mounting onto at least a portion of the prefabricated staircase frame; and Figures 7 and 8 are enlarged sectioned view taken along lines 7 and 8, respectively, showing attachment details of the different plates.
• Each step 6 comprises in known manner a tread 8 with a riser 10 in orthogonal horizontal and vertical disposition in relation to one another respectively, each tread having a leading edge covering the top edge of its subjacent riser.
• Decorative pre-finished riser plates 12, with mitred ends 12', are provided for the risers 10 of each step 6 and are bonded thereto by a suitable adhesive diagrammatically indicated by glue beads 14.
• Decorative pre-finished tread plates 16 are provided for the treads 8.
• Each tread plate 16 has a decorative nosing 18 forming a front edge thereof and a plurality of spaced apart spikes members 20 extending horizontally inwardly beneath the tread plate from a lip 17 of the nosing 18 to a subjacent riser 10 with the tread plate 16 abuttingly covering the tread by insertion of the spike members through the adjacent riser plate 12 and into the adjacent riser 10 with the lip 17 abutting against the adjacent riser 10 and with the side edges of the tread plate 16 in register with the treads 8 and with the vertical surfaces 2a, 4a of the respective stringer boards 2, 4.
• each tread plate 16 has a decorative nosing 19 since the tread plates are to be part of the open side of the staircase, no such edge nosing being required at the other edge since it will be located adjacent a bounding wall structure (not shown) of the relevant building.
• pre-drilled dowel holes 22 are formed in the vertical surface 2a of the stringer 2 with correspondingly located blind dowel holes 22' (see Figure 3) being formed on the hidden side of the pre-finished stringer plate 40.
• Dowels 23 are provided for accurate positioning of the pre-finished stringer plate 40 relative to the corresponding stringer 2 by positive and frictional engagement in the aligned dowel holes 22 and their counterparts 22' in the plate 30.
• Each tread 8 adjacent each side edge thereof is pre-drilled with pocket holes 33 which extend into and through the respective stringer board 2, 4 as can be seen at 33a.
• a prefabricated decorative stringer plate 40 is provided on the open side of the staircase 1 and as shown essentially replicates the form of the stringer board 2 to which it is attachable by the dowels 23 registering with the holes 22 and their blind counterparts 22' (see Figure 3) in the hidden side of the plate 40, the pocket hole screws (not shown).
• the riser edges 41 of the plate 40 are mitered as at 41 '.
• a prefabricated stringer plate 42 is provided on the closed side of the staircase 1 and may also have pre-drilled dowel holes (not shown) if it is applicable for its installation, the plate 42 being of quasi-trapezoidal shape such that in situ it covers in and thus closes the other side of the staircase 1 (see Figure 1 ).
• a stringer plate 42 on a closed side of the staircase 1 , is slidably insterted into a corresponding opening left between the staircase and the rough adjacent wall.
• the installation of the skeleton of the staircase 1 is achieved in conventional manner and as can be seen from Figure 5, the base 50 thereof is provided with a foot plate 52 for placement on a floor 54 with suitable bolting arrangements 56 being provided. As can be seen from this Figure 5, the bolting arrangements 56 are adjustable thus facilitating leveling.
• the riser plates 12 are then applied to the risers 6 as previously indicated and bonded thereto be suitable glue.
• the stringer plates 40, 42 are then affixed to the respective stringer boards 2, 4 with the use of the dowels 23 and the use of pocket screws (now shown) driven through the treads 8, the stringer boards 2, 4 and into the plates 40, 42.
• slots 60 extending part way along their length.
• each horizontal edge 43 of the stringer plate 40 extends inwardly from a superjacent vertical edge 41 and forms a corresponding tread slot 43' to allow the respective tread plate 16 to intersect the superjacent vertical plate edge 41 ' and have the tread plate 16 locally sandwiched between the stringer plate 40 and the corresponding superjacent riser plate 12.
• FIG. 8 there is shown another embodiment of a finishing plate arrangement 80, or kit, that is preassembled, or factory assembled, into three lower 81 , middle 82 and upper 83 sections, plus a joining tread plate 84 between the middle and upper sections 82, 83.
• the arrangement 80 is adapted to mount over the prefabricated staircase frame 71 surrounded by an adjacent bounding wall structure 72 of the relevant building shown in stippled lines with the exception of one side of the lower section 81 and the lowest tread plate 16 of the middle section 82 which is open.
• the lowest one 81 has to be installed first since the bottom portion of the superjacent section 82 generally slides over the top portion of the subjacent section 81.
• the decorative front nosing 18 of the lowest tread plate 16 of the middle section 82 abuttingly covers to top edge of the uppermost riser plate 12 of the lower section 81 and the corresponding horizontal edge 43 of the stringer plate 40.
• the downwardly protruding staircase inner corner stringer plate of the middle section 82 represented here by a stringer post 42' or the like (since the middle section 82 is a 90-degree angle section), also slides inside a corresponding recess 45 made into the closed side stringer plate 44 of the lower section 81 for better securing the two sections 81 , 82 to one another.
• each section 81 , 82, 83, 84 onto a corresponding portion of the prefabricated staircase frame 71 could be done using any suitable chemical and/or mechanical securing means such as adhesive, screws and the like.
• the stringer finishing plates 44 abutting against an adjacent wall structure 72 are adapted to abut the exposed front and top finished surfaces of the corresponding riser and tread plates 12, 16 for attachment thereto via securing screws 46 from the back and undersides of the plates 12, 16, respectively, as shown in Figures 7 and 8.
• adjacent riser and tread plates 12, 16 are also secured to one another with a plurality of securing screws 46 or the like attachment means.
• predrilled holes are provided at the different locations to ensure proper registration of the adjacent plates 12, 16, 40, 42', 44 and prevent damaging thereof with the screws 46 while being inserted.
• slots with corresponding Chinese nails or the like could also be used to better secure the corresponding mitred edges of the stringer plate 40 and the corresponding riser edges, as shown in Figure 4.
• the prefabricated staircase frame 1 , 71 may also be part thereof, especially as they could be sold into a whole complete staircase kit, including the rough frame and the corresponding finishing plates.
• the present invention thus provides a staircase of relatively simple skeletal construction with the added aesthetic cladding provided by the easy-to-apply prefabricated decorative plates to cover the treads, the risers and the stringers of the staircase skeleton, which may thus be produced from relatively unfinished wood. Furthermore, the staircase may be installed with minimal skills in the absence of any requirement to cut wood to size since all elements are prefabricated and pre-drilled as needed.

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• 2010
  • 2010-06-18 US US12/801,643 patent/US20100319278A1/en not_active Abandoned
  • 2010-06-21 WO PCT/CA2010/000965 patent/WO2010145039A1/en active Application Filing
  • 2010-06-21 EP EP10788580A patent/EP2443298A1/de not_active Withdrawn
  • 2010-06-21 CA CA2708204A patent/CA2708204C/en active Active
  • 2010-06-21 CN CN2010800346207A patent/CN102803632A/zh active Pending

Non-Patent Citations (1)

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