Abstract
The invention relates to a telescopic staircase to be installed on construction sites for providing a safe staircase for workers during building construction. The telescopic staircase comprising at least one lateral guard comprising a top rail, a bottom rail and at least two newels, the bottom rail having a plurality of connecting holes, and a plurality of tread assembly comprising a tread plate, at least two stringer portions and at least two pairs of support members, each support member having at least one connecting hole, in which the at least one lateral guard includes a first portion being retractable into and extensible from a second portion, in which each support member substantially forms a 45° angle with the tread plate, and in which the support members are to be attached to the top surface of the bottom rail via attachment means through the connecting holes.
Claims
1. A telescopic staircase comprising: a lateral guard having: a first portion having a first top rail, a first bottom rail and a first newel, the first newel connecting the first top rail to the first bottom rail; and a second portion having a second top rail, a second bottom rail and a second newel, the second newel connecting the second top rail to the second bottom rail, wherein the first bottom rail and the second bottom rail comprise connecting holes, and wherein the first portion is telescopable inside the second portion, the first top rail is telescopable inside the second top rail and the first bottom rail is telescopable inside the second bottom rail, the first bottom rail having a first cross-section smaller than a second cross-section of the second bottom rail; and a plurality of tread assemblies, each tread assembly comprising a tread plate, each tread assembly being removably and directly attached to one of the first bottom rail or the second bottom rail, each tread assembly further comprising two stringer portions and a pair of support members on each stringer portion, each tread assembly being attached to one of the first bottom rail and the second bottom rail through the connecting holes.
2. The telescopic staircase of claim 1, wherein the lateral guard is high or low.
3. The telescopic staircase of claim 1, wherein the tread assembly is telescopic.
4. The telescopic staircase of claim 1, wherein the telescopic staircase is made of one of aluminum, magnesium, steel, stainless steel, galvanized steel, titanium, copper, brass or bronze.
5. The telescoping staircase of claim 1, wherein each support member substantially forms a 45° angle with its associated tread plate.
6. The telescoping staircase of claim 5 wherein the support members are reversibly attached to a top surface of one of the first bottom rail or the second bottom rail via attachment means through the connecting holes.
7. The telescoping staircase of claim 1 comprising two lateral guards, each tread of the plurality of treads being connected on each side to one of the two lateral guards.
8. The telescoping staircase of claim 1 further comprising a blocker connecting the first top rail to the first bottom rail so as to lock the lateral guard.
9. The telescoping staircase of claim 1 wherein the first top rail and the second top rail are telescopic along a top longitudinal axis and wherein the first bottom rail and the second bottom rail are telescopic along a bottom longitudinal axis, the top longitudinal axis and the bottom longitudinal axis being parallel to each other.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) Further features and advantages of the present disclosure will become apparent from the following detailed description, taken in combination with the appended drawings, in which:
(2) FIG. 1A illustrates a perspective view of a fully extended telescopic staircase with a high lateral guard, according to one embodiment of the present invention;
(3) FIG. 1B illustrates a perspective view of a portion of a fully extended telescopic staircase with a low lateral guard, according to one embodiment of the present invention;
(4) FIG. 1C illustrates a perspective view of a zoom in on a fully extended telescopic staircase with a high lateral guard, according to one embodiment of the present invention;
(5) FIG. 2A illustrates a side view of a single tread of a telescopic staircase, according to one embodiment of the present invention;
(6) FIG. 2B illustrates a top view of a single tread of a telescopic staircase, according to one embodiment of the present invention;
(7) FIG. 2C illustrates a front view of a single tread of a telescopic staircase, according to one embodiment of the present invention;
(8) FIG. 3 illustrates a perspective view of a single telescopic tread assembly, according to one embodiment of the present invention;
(9) FIG. 4A illustrates a perspective view of one side of a telescopic top guard, according to one embodiment of the present invention;
(10) FIG. 4B illustrates a perspective view of one side of a telescopic top guard assembled with a blocker, according to one embodiment of the present invention;
(11) FIG. 4C illustrates a perspective view of another side of a telescopic top guard assembled with a blocker, according to one embodiment of the present invention;
(12) FIG. 5 illustrates a perspective view of a load-lifting system assembled on a high lateral guard, according to one embodiment of the present invention.
(13) It will be noted that throughout the appended drawings, like features are identified by like reference numerals.
DETAILED DESCRIPTION
(14) In embodiments there are disclosed a telescopic staircase system and uses thereof.
(15) Referring now to the drawings, and more particularly to FIGS. 1A-C, there is shown an embodiment of a fully extended telescopic staircase (10) assembled with at least one high lateral guard (20) or at least one low lateral guard (30). The telescopic staircase (10) is incrementally adjustable to any number of different heights. The high lateral guard (20) includes a top rail (22), a mid-rail (24), a bottom rail (26) and at least two newels (28). The low lateral guard (30) includes a top rail (32), a bottom rail (36) and at least two newels (38). A first portion (40) of the high or low lateral guard (20, 30) is retractable into—and extensible from—a second portion (50) of the high or low lateral guard (20, 30), conferring the telescopic property to the staircase. The size of the structure of the first portion (40) of the high or low lateral guard (20, 30) is smaller than the structure of the second portion (50) of the high or low lateral guard (20, 30). The bottom rail (26, 36) includes a plurality of connecting holes (60) which are evenly distributed on the bottom rail (26, 36). The telescopic staircase (10) includes a plurality of reversibly connected tread assemblies (70). Each tread assembly (70) of the telescopic staircase (10) are reversibly connected to a top surface (80) of the bottom rail (26, 36). A blocker (90) is reversibly connected to the top (22, 32) and bottom (26, 36) rails of the first portion (40) of the high or low lateral guard (20, 30). The blocker (90) serves to support and lock the telescopic staircase into a determined height.
(16) Now referring to FIGS. 2A-C, there is shown an embodiment of a single tread assembly (70). Each tread assembly (70) includes a tread plate (100), at least two stringer portions (110) and at least two pairs of support members (120). The support members (120) extend laterally and substantially perpendicularly from the stringer portion (110) of the tread assembly (70). Each pair of support members (120) comprises support members that are facing each other, where each support member is positioned on opposite stringer portions (110). Each support member has at least one connecting hole (130) and substantially forms a 45° angle with the tread plate (100). The support members (120) of the tread assembly (70) are to be connected to the top surface (80) of the bottom rail (26, 36) via attachment means (140) through the connecting holes (60, 130). The attachment means (140) includes shoulder screws.
(17) Now referring to FIG. 3, there is shown an embodiment of a single telescopic tread assembly (92). Each telescopic tread assembly (92) includes a tread plate (105), at least two stringer portions (110) and at least two pairs of support members (120). Each telescopic tread assembly (92) is incrementally adjustable to any number of different lengths. A first portion (94) of the telescopic tread assembly (92) is retractable into—and extensible from—a second portion (96) of the telescopic tread assembly (92), conferring the telescopic property to the tread assembly. The size of the structure of the first portion (94) of the telescopic tread assembly (92) is smaller than the structure of the second portion (96) of the telescopic tread assembly (92). The tread plate (105) of the telescopic tread assembly (92) comprises a plurality of grooves (98) which extend on both the first portion (94) and the second portion (96) of the telescopic tread assembly (92). The support members (120) extend laterally and substantially perpendicularly from the stringer portion (110) of the telescopic tread assembly (92). Each pair of support members (120) comprises support members that are facing each other, where each support member is positioned on opposite stringer portions (110). Each support member has at least one connecting hole (130) and substantially forms a 45° angle with the telescopic tread plate (105). The support members (120) of the telescopic tread assembly (105) are to be connected to the top surface (80) of the bottom rail (26, 36) via attachment means (140) through the connecting holes (60, 130). The attachment means (140) includes shoulder screws.
(18) Now referring to FIG. 4A-C, there is shown an embodiment of a fully extended telescopic top guard (150) assembled with or without a retainer (160). The telescopic top guard (150) is incrementally adjustable to any number of different lengths. The telescopic top guard includes a top rail (152), a mid-rail (154), and at least two poles (156). A first portion (170) of the telescopic top guard (150) is retractable into—and extensible from—a second portion (180) of the telescopic top guard, conferring the telescopic property to the top guard. The size of the structure of the first portion (170) of the telescopic top guard (150) is smaller than the structure of the second portion (180) of the telescopic top guard. Each of the poles (156) includes an attachment member (190) at the lower end (i.e. facing the ground) of the pole. The attachment member (190) includes a retaining element (192) and a planar element (194), forming an aperture (196) to receive the retainer (160). The retaining element (192) includes at least one connecting hole (198) through which attachment means (200) hold the retainer (160) in place. The retainer can be a construction wood piece. The planar element (194) includes at least one anchoring hole (210) through which attachment means hold the telescopic top guard (150) on the ground. The telescopic top guard can be installed at the top of a hole, where the telescopic staircase is to be installed.
(19) Now referring to FIG. 5, there is shown an embodiment of a load-lifting system (200) assembled on a high lateral guard (20). The load-lifting system comprises an attachment member (202), a platform portion (204) and means for mobility (206). The attachment member (202) is movable on the high lateral guard (20). The platform portion (204) is substantially parallel to the tread assemblies (90, 92) and can be upwardly foldable towards the attachment member (202). The means for mobility (206) can be a powered mechanism or a manual mechanism that is installed on the high lateral guard (20) of the telescopic staircase (10).
(20) The telescopic staircase can be used with the telescopic top guard and a load lifting system as a kit, for example, for on-site temporary installation such as construction purposes. The telescopic staircase can be adjusted as needed to any height and width (when using a telescopic tread assembly). Similarly, the telescopic top guard can be adjusted as needed to any length. For instance, the tread assemblies can be reversibly connected to the bottom rail of a lateral guard on one side and being juxtaposed on the wall on the other side, without necessarily installing a lateral guard on both sides.
(21) While preferred embodiments have been described above and illustrated in the accompanying drawings, it will be evident to those skilled in the art that modifications may be made without departing from this disclosure. Such modifications are considered as possible variants comprised in the scope of the disclosure.
