AN APPARATUS FOR RESTRAINING MOVEMENT OF A LADDER

Abstract

An apparatus for restraining the movement of a ladder is disclosed. The apparatus is formed of plate which can be attached to roof of a structure using nails or other fastening devices. In one embodiment of the present invention, the plate has a stationary bracket which extends from an edge of the plate. A movable bracket is attached to the plate which also has a portion that extends from the edge of the movable bracket. The stationary bracket and the moveable bracket cooperate to receive and retain the respective side support rails of a ladder when the ladder is leaned against a structure. In a second embodiment, both brackets are movable.

Claims

1. An apparatus for restraining the movement of a ladder, said apparatus comprising: a plate adapted for attachment to the roof of a structure, said plate having a stationary bracket extending from an edge of said plate; a movable bracket adapted for attachment to said plate, said movable bracket having a portion thereof that extends from an edge of said movable bracket; and wherein said stationary bracket and said moveable bracket cooperate to receive and retain the respective side support rails of a ladder when said ladder is leaned against said structure.

2. The apparatus of claim 1, wherein said plate includes a plurality of holes for securing said plate to said roof using a fastening device.

3. The apparatus of claim 2, wherein said fastening device is a nail.

4. The apparatus of claim 1, wherein said movable bracket includes an elongated slot through which said movable bracket is attached to said plate using a fastening device.

5. The apparatus of claim 4, wherein said fastening device is a nut and bolt.

6. An apparatus for restraining the movement of a ladder, said apparatus comprising: a plate adapted for attachment to the roof of a structure, said plate having first and second rotating brackets that when rotated to a first position extends from the edge of said plate and when rotated to a second position is within the boundary of said plate; and wherein when said first and second brackets are rotated to said first position said brackets cooperate to receive and retain the respective side support rails of a ladder when said ladder is leaned against said structure.

7. The apparatus of claim 6, wherein said plate includes a plurality of holes for securing said plate to said roof using a fastening device.

8. The apparatus of claim 7, wherein said fastening device is a nail.

9. The apparatus of claim 6, wherein said first and second brackets are rotatably attached to said plate using a fastening device.

10. The apparatus of claim 6, wherein said first and second brackets and said plate have a locking device that locks said first and second brackets in said first positon.

11. The apparatus of claim 6, wherein locking device is forms of a pin inserted through corresponding holes in said first and second brackets and said plate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The novel features of the present invention are set out with particularity in the appended claims, but the invention will be understood more fully and clearly from the following detailed description of the invention as set forth in the accompanying drawings in which:

[0010] FIG. 1 illustrates one embodiment of a step ladder as known in the prior art;

[0011] FIG. 2 illustrates one embodiment of a ladder as known in the prior art;

[0012] FIG. 3 illustrates one embodiment of an extension ladder as known in the prior art;

[0013] FIG. 4 is a top view of one embodiment of an apparatus for restraining the movement of a ladder in accordance with the present invention;

[0014] FIG. 5 is a top view of a further embodiment of an apparatus for restraining the movement of a ladder in accordance with the present invention;

[0015] FIG. 6 is an illustration of the embodiment of the present invention as shown in FIG. 4 in use on a roof;

[0016] FIG. 7 is an illustration of the embodiment of the present invention as shown in FIG. 5 in use on a roof; and

[0017] FIGS. 8-10 are dimensional construction diagrams of the embodiments of the present invention as shown in FIGS. 4 and 5.

DESCRIPTION OF THE PREFERRED EMBODIMENT

[0018] A preferred embodiment of the present invention will be described with further reference to the drawings.

[0019] FIG. 4 illustrates one embodiment of an apparatus for restraining the movement of a ladder in accordance with the present invention.

[0020] As shown in FIG. 4, the apparatus comprises a plate 40 having a plurality of apertures or holes 41 which allow plate 40 to be temporarily nailed or otherwise secured, for example, to the edge of a roof as shown in FIGS. 6 and 7.

[0021] Plate 40 also includes a ladder retraining tab 42 which projects outward from the edge of plate 40.

[0022] The apparatus further includes a slotted ladder lock bar 43 which is attached to plate 40 with one or more fasteners 44. Fasteners 44 can be tighten down to secure bar 43 in one of a number of lateral positions about plate 40 as indicated by arrow 45.

[0023] Bar 43 also has a ladder retraining tab 46 which projects out from plate 40.

[0024] As also illustrated in FIG. 4, a pair of anchor points 47 and 48 is provided which form a rotatable retainer to which a strap, rope or other device may be attached for holding the apparatus during transport or carrying to a roof top for installation.

[0025] When a ladder is leaned against a building with plate 40 in place, the side rails of the ladder, for example rails 21 and 22 as shown in FIG. 2 (or the side rails of ladder 31 as shown in FIG. 3) are positioned between ladder retaining tabs 42 and 46 and the location of lock bar 43 is adjusted accordingly along arrow 45 to prevent the top end of the ladder from moving. Lock bar 43 may then be secured in position by fasteners 44. Thus, the elevated end of the ladder can be stabilized, making the ladder safer to use.

[0026] The present invention may also be used to stabilize the lower end of the latter in a similar fashion.

[0027] FIG. 5 illustrates a further embodiment of an apparatus for restraining the movement of a ladder. In this embodiment, a pair of pivoting ladder rail locks 51 and 52 is used to secure the side rails of a ladder as shown in FIG. 7.

[0028] Rail locks 51 and 52 have respective pivot points 53 and 54 which, by way of example only, may be formed of a nut and bolt combination or a rivet. Thus, rail locks 51 and 52 rotate about these pivot point so that the rail locks can be rotated into place in order to secure the side rails of the ladder to the apparatus as shown in FIG. 7. Thus, the end of the ladder is locked to the apparatus in order to prevent lateral movement of the ladder.

[0029] Rail locks 51 and 52 include a hole 55 which overlaps a corresponding hold 56 when the rail locks are moved into place to lock the side rails of the ladder. Pins 57 and 58 may then be inserted through the respective holes to prevent the rail locks from moving. As shown in FIG. 5, pin 57 is already inserted in its respective holes 55 and 56.

[0030] To insure that the pins 57 and 58 do not become lost or misplaced, they are secured to the apparatus with respective cords 59 and 60 as shown in FIGS. 5 and 7. Cords 59 and 60 may be made of steel braided cable incased in plastic or other suitable materials.

[0031] FIGS. 8-10 dimensionally illustrate the construction of the embodiments of applicant's apparatus for restraining movement of a ladder as shown in FIGS. 4-7.

[0032] The various elements of the apparatus may be fabricated from a number of materials, including metals, plastics and composites as one of ordinary skill in the art would understand.

[0033] While the foregoing specification teaches the principles of the present invention, with examples provided for the purpose of illustration, it will be appreciated by one skilled in the art from reading this disclosure that various changes in form and detail can be made without departing from the true scope of the invention.