WO2017127895A1 - Device for stabilising a ladder, and a ladder - Google Patents
Device for stabilising a ladder, and a ladder Download PDFInfo
- Publication number
- WO2017127895A1 WO2017127895A1 PCT/AU2017/050068 AU2017050068W WO2017127895A1 WO 2017127895 A1 WO2017127895 A1 WO 2017127895A1 AU 2017050068 W AU2017050068 W AU 2017050068W WO 2017127895 A1 WO2017127895 A1 WO 2017127895A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ladder
- arm
- stiles
- engagement mechanism
- pair
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/48—Ladder heads; Supports for heads of ladders for resting against objects
- E06C7/486—Supports specially adapted to support a ladder on a gutter
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
- E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
- E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/34—Ladders attached to structures, such as windows, cornices, poles, or the like
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/18—Devices for preventing persons from falling
- E06C7/188—Accessories for temporary stabilising a ladder, e.g. temporary attaching devices
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/42—Ladder feet; Supports therefor
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/48—Ladder heads; Supports for heads of ladders for resting against objects
Definitions
- the present invention relates to a device for stabilising a ladder against a structure, and a stabilised ladder and extendable ladder.
- Ladders typically comprise a pair of stiles, or rails, which extend longitudinally and between which a plurality of rungs are affixed.
- Extendable ladders typically comprise two such ladders, whereby a first ladder has a sleeve or guide for receiving the stiles of a second ladder to allow the second ladder to telescopically slide relative to the first ladder.
- Ladders are used to allow a user to access an elevated location.
- the stiles are arranged on a ground surface and against a structure, and the user climbs the rungs to access the elevated location.
- the elevated mass of the user can cause the ladder to become unstable, which can result in the user falling and consequently injury or death.
- ladder stabiliser devices are also well known. These typically comprise a pair of arms which are secured towards a top end of the ladder and extend laterally therefrom. The arms are arranged to rest against the structure, for example, against a wall or roof, to increase the width of support for the top end of the ladder.
- gutter clamps are known and generally affixed towards a top end of the ladder.
- the gutter clamps engage a gutter arranged around a periphery of a roof to secure the ladder to the gutter.
- a device for stabilising a ladder, or a ladder with improved stability which is less prone to falling away from a structure.
- the present invention discloses an apparatus for connection to a ladder whereby a ladder is wedged between the ground and against a surface and/or under the surface.
- the invention is a unitary device which engages with rungs or stiles with an arm extending therefrom so as to provide the wedge against the surface.
- the device can adopt a stowed position so that the ladder can be connected to the ladder in a readily transportable position for quick deployment, and a deployed position so as to form a stabiliser which is ready for wedging.
- a device for stabilising a ladder against a surface the ladder having a pair of stiles and a plurality of rungs connected therebetween, the device comprising an engagement mechanism for releasably engaging two adjacent rungs, the engagement mechanism including two opposed receiving portions for at least partially receiving a rung, at least one of the receiving portions being selectively movable relative to the other thereby allowing the engagement mechanism to urge against the adjacent rungs and at least one arm pivotably connected to the engagement mechanism to allow pivoting thereof to a fixed angle relative to the engagement mechanism, the at least one arm having an abutting portion for abutting under the surface, thereby allowing the ladder to be wedged between the surface and ground level to stabilise the ladder.
- a ladder comprising a pair of stiles, a plurality of rungs connected between the stiles and a pair of arms pivotable relative to the stiles, to allow pivoting thereof between a stowed position substantially parallel to the stiles and a deployed position at a fixed angle relative to the stiles, each arm arranged proximal to a respective stile and having an abutting portion for abutting under the surface, thereby allowing the ladder to be wedged between the surface and ground level to stabilise the ladder.
- a device for stabilising a ladder against a surface the ladder having a pair of stiles and a plurality of rungs connected therebetween, the device comprising: at least one arm connected to the ladder, extending therefrom at a selected angle relative to the ladder, the at least one arm having an abutting portion for abutting under the surface, thereby allowing the ladder to be wedged between the surface and ground level to stabilise the ladder, the device further including a jack foot engaged with the ground and a base portion of the ladder so as in use to elevate the ladder so that the ladder is wedged between the surface and the ground.
- a device for stabilising a ladder against a surface the ladder having a pair of stiles and a plurality of rungs connected therebetween, the device comprising: an engagement mechanism for releasably engaging the ladder by the stiles and/or the rungs, and at least one arm pivotably connected to the engagement mechanism to allow pivoting thereof to a fixed angle relative to the engagement mechanism, the at least one arm having an abutting portion for abutting under the surface, thereby allowing the ladder to be wedged between the surface and ground level to stabilise the ladder.
- a ladder with a stabiliser which can adopt a stowed position out of the way of extending portions, and a deployed position ready for quick stabilising wedging under or against a surface.
- Figure 1 is an isometric view of one embodiment of a stabiliser device shown in a deployed position
- Figure 2 is an isometric view of the stabiliser device being deployed
- Figure 3 is a side elevation view of the stabiliser device in the deployed position
- Figure 4 is a side elevation view of the stabiliser device shown in the stowed position
- Figure 5 is a perspective view of a stabiliser device secured to a ladder and arranged in a deployed configuration
- Figure 6 is a perspective view of the stabiliser device shown in Figure 1A arranged in a stowed configuration
- Figure 7 is a side view of the stabiliser device shown in the previous figures in isolation
- Figure 8 shows three side views of the stabiliser device shown in the previous figures in deployed, stowed, and disassembly configurations
- Figure 9 shows a side a front view of the stabiliser device and ladder shown in Figures 5 and 6 arranged against a structure
- Figure 10 shows a perspective view of an alternative stabiliser device secured to a ladder
- Figure 11 shows a side view of a further alternative stabiliser device secured to a ladder and arranged against a structure
- Figure 12 shows three side views of the stabiliser device shown in Figures 5 to 9 secured to three different ladders and a rung adaptor;
- Figure 13 shows a detail view of an engagement mechanism of the stabiliser device shown in the previous figure.
- Figure 14 is an isometric view of the stabiliser device shown in the deployed position with an extensible cross member disposed between the arms.
- FIG. 1 there is shown two stabiliser devices 10 secured to a ladder 1 (certain features of the ladder in Figures 1 to 4 except for the rungs 4 have been removed for clarity).
- the devices are for stabilising the ladder 1 against a surface, in some instances having an underside.
- the ladder 1 has a pair of stiles 2 and a plurality of rungs 4 connected therebetween.
- the device 10 comprises an engagement mechanism 11 for releasably engaging two adjacent rungs 4, the engagement mechanism 11 including two opposed receiving portions 14, each one being for at least partially receiving one of the rungs 4. At least one of the receiving portions 11 is selectively movable (in this embodiment extensible) relative to the other thereby allowing the engagement mechanism to urge against the adjacent rungs 4 so that the device is retained in a retained position between the rungs. It is to be understood that the movement between the receiving portions may be some other movement other than extending, such as for example, pivoting, or detachment. The extensible movement may be by hydraulic ram, or threading, or other suitable mechanisms.
- the engagement mechanism could attach to another part of the ladder 1, say, to the stiles by, for example, a hinged sleeve arrangement having half-sleeves clasped or otherwise fastened together, or a part sleeve without a hinge, so as to at least partially surround a stile.
- a hinged sleeve arrangement having half-sleeves clasped or otherwise fastened together, or a part sleeve without a hinge, so as to at least partially surround a stile.
- There may be some other coupling arrangement which would be suitable, which could couple an arm to the rung and/or stile.
- At least one arm 12 pivotally connected to the engagement mechanism 11 to allow pivoting thereof to a predetermined, or selected, or fixed angle relative to the engagement mechanism.
- the at least one arm 12 has an abutting portion for abutting under the surface, thereby allowing the ladder to be wedged between the surface and ground level to stabilise the ladder.
- the arm 12 could be detachably connected to the engagement mechanism 11 , or it could be have an extendable form, similar in arrangement to that described herein for the relatively movable receiving portions 14 - threadably extensible or similar - as described for that mechanism .
- Figures 5 and 6 show a pair of stabiliser devices 10 secured to a ladder 1.
- the devices 10 are generally for stabilising the ladder 1 against a surface (not shown) extending from or affixed to a structure (not shown).
- the ladder 1 has a pair of stiles 2 and a plurality of rungs 4 connected therebetween.
- Each stile 2 has an inner face 5 arranged opposite the other, between which each rung 4 is connected.
- Each stabiliser device 10 includes an engagement mechanism 11 for releasably engaging the ladder 1 and at least one arm 12 pivotably connected thereto.
- the device 10 includes a single arm 12 which is pivotable between a stowed configuration (as shown in Figures 4 and 6), in which the arm 12 is arranged substantially parallel to the stiles 2, and a deployed configuration (as shown in Figures 1 and 5), in which the arm 12 extends away from the stiles 2 at a predetermined angle.
- the arm 12 includes an abutting portion 13 for abutting under the surface.
- the device 10 is often used as part of an assembly, comprising a pair of like devices 10, as shown in Figures 1 and 2 and 5 and 6, thereby providing a pair of arms 12 for stabilising the ladder 1.
- a single device 10 may be affixed to the ladder 1, having one or more arms 12.
- the arm 12 may be adapted to have a broad abutting portion 13 to increase the contact area of the arm 12 against the surface.
- the engagement mechanism 11 is configured to releasably engage two adjacent rungs 4.
- the mechanism 11 includes two opposed receiving portions 14 each adapted to at least partially receive a rung 4, at least one of the receiving portions 14 being selectively movable relative to the other, thereby allowing the engagement mechanism 11 to urge the receiving portions 14 against the adjacent rungs 4 and engage the device 10 with the ladder 1.
- each device 10 is typically engaged with the rungs 4 to position each device adjacent a respective stile 2. This ensures that regardless of configuration (deployed/ stowed), the device 10 is arranged within the boundaries of the stiles 2 and forms a space between the devices 10, thereby optimising access to the rungs 4.
- This arrangement particularly useful if the ladder 1 is an extendable ladder (not shown), whereby each stile 2 must slide through a sleeve or guide (not shown), and therefore the device 10, when arranged in the stowed configuration, does not interfere with the sleeve/guide and does not prevent the ladder 1 from being extended or retracted.
- the device 10 is used in an assembly comprising a pair of like devices 10 to allow the assembly to be readily adjusted in width to fit to different ladders and optimise access to the rungs 4.
- the engagement mechanism 11 may include a pair of engaging portions (not shown) each including a pair of opposed and selectively movable receiving portions for at least partially receiving the rungs 4.
- the pair of engaging portions are connected and selectively movable relative to each other to adjust the width of the device for different ladders.
- each engaging portion may have an arm 12 pivotably connected thereto. In either case, arranging the device 10 (or engaging portions) adjacent the stiles 2 optimises space therebetween and minimises any obstruction to a user climbing the ladder 1 caused by the device 10.
- the assembly comprising two like devices 10 may include two identical devices 10.
- the devices 10 may be adapted to be left or right sided, as shown in Figures 5 and 6, whereby a left side device 101 has the arm 12 arranged on a left side thereof, and a right side device 102 has the arm 12 arranged on a right side thereof, allowing the device 10 to be engaged with the ladder 1 such that the arms 12 are proximal to the inner faces 5 of the stiles 2.
- the arms 12 are pivoted towards the engagement mechanism
- Figure 7 shows a side view of the device 10 shown in Figures 5 and 6 in cross-section through the engagement mechanism 11.
- the engagement mechanism 11 includes receiving portions 14 at either end thereof, each portion 14 adapted to at least partially receive a rung 4. At least one receiving portion 14 is selectively movable relative to the other receiving portion 14, thereby allowing the engagement mechanism 11 to engage between two adjacent rungs 4. This typically involves one receiving portion 14 being mounted on a movable portion 21 slidable relative to a housing 22.
- the movable portion 21 is actuated by operating a lever 23 connected to the movable portion, typically via one or more struts 24. Moving the lever upwards drives the upper receiving portion 14 up and into engagement with the upper rung so that the device 10 is in the retained position ( Figure 1 and the like), while moving the lever 23 downward releases the upper receiving portion 14 from the upper rung 4.
- the arms 12 are deployed into the deployed position by extracting a pin from an inner face of the engagement mechanism 11.
- the pin then allows the arm 12 to drop into the deployed position and the pin may be reinserted to lock the arm 12 in that deployed position.
- the arm 12 is shown in at least Figures 1, 2, 3, 5 and 7, pivoted away from the engagement mechanism 11, revealing an abutting portion 13 at an end thereof.
- the abutting portion 13 is arranged to abut underneath a surface (not shown), importantly providing a contact region between the device 10 and a structure the device 10 is stabilising a ladder 1 against.
- the abutting portion 13 is typically adapted to grip the surface, for example, by having synthetic rubber pads 15 secured thereto which increase friction between the abutting portion 13 and the surface.
- the abutting portion 13 may also be adapted to at least partially receive or engage a corner, typically comprising two surfaces 16 arranged at right angles to each other to receive respective surfaces of the structure, such as an eave or windowsill.
- the abutting portion 13 may further comprise a pivotable flange 19 secured to one or both of these surfaces 16 to allow the portion 13 to conform to different corner geometries.
- the pivotable flange 19 can pivot about +/- 10 degrees but could pivot any other suitable number of degrees to allow some flexibility of installation.
- Figure 8 shows three further side elevation views of the device 10 arranged between two adjacent rungs 4, illustrating the engagement mechanism 11 being operated.
- moving the lever 23 towards the housing 22 extends the movable portion 21 away from the housing 22 and against a rung 4, thereby engaging the device 10 with the ladder 1.
- moving the lever away from the housing 22 retracts the movable portion 21 within the housing 22 and away from the rung 4, thereby disengaging the device 10 with the ladder 1.
- Figure 9 shows a side and front view of the device 10 engaged with the ladder 1 and stabilising the ladder 1 against a surface 40 extending from a structure 41.
- the arm 12 is arranged in the deployed configuration, extending away from the stiles 2.
- the abutting portion 13 is arranged under the surface 40.
- the surface 40 is connected to an end face 42 and the abutting portion 13 is also abutted against the end face 42.
- a bottom end 17 of each stile 2 is moved towards the structure 41, thereby wedging the ladder between the surface 40 and a ground level 44.
- the arrangement of the device 10 and ladder 1 in this way securely engages the ladder 1 with the structure 41 and surface 40, minimising side-to-side movement of the ladder 1 and significantly reducing the likelihood of the ladder 1 falling backwards, away from the structure 41.
- Figure 10 shows a variation of the device 10 where the arm 12 is adapted to be releasably connected to a tree spike 18.
- the tree spike has one or more sharp protrusions extending therefrom for penetrating a tree (not shown), thereby allowing the device to stabilise the ladder 1 against a tree.
- Figure 11 shows a side view of the device 10 engaged with the ladder 1 and stabilising the ladder against an alternative structure 60.
- the device 10 forms part of an alternative assembly, further comprising a jack foot 61 connected to the bottom end 17 of at least one stile 2.
- the jack 61 has an extendable portion 62 operable by a lever 63. Operation of the lever 63 extends the extendable portion 62 causing the ladder 1 to move away from the ground level 44. This consequently urges the device 10 against the structure 60, further reducing the likelihood of side-to-side or rearward movement of the ladder 1.
- Figure 12 shows three side views of the device 10 engaged with three different ladders 101, 102, 103, each having a differently shaped rung profile.
- the left and middle view illustrate the receiving portion 14 receiving the respective rungs to a different depth.
- the right view illustrates the receiving portion 14 receiving a rung adaptor 20 shaped to engage the rung profile of the respective ladder 103.
- Figure 13 shows two detailed views of the engagement mechanism 11, the left view showing the engagement mechanism 11 in an installed configuration where the receiving portion 14 is urged against the rung 4, and the right view showing the engagement mechanism 11 in a released configuration where the receiving portion 14 is moved away from the rung 4.
- the engagement mechanism 11 may further comprise an adjustment mechanism for adjusting the length of the engagement mechanism 11 to allow the engagement mechanism 11 to engage a range of spans between adjacent rungs 4.
- the adjustment mechanism typically comprises an adjuster 80 selectively movable relative to the strut 24, typically by being threadably engaged.
- the adjuster 80 is arranged against a resilient element 81, such as a coil spring, which is trapped between the adjuster 80 and the movable portion 21.
- Operating the lever 23 urges the strut 24 and adjuster 80 towards the receiving portion 14, which compresses the resilient element 81 and causes the movable portion 21 and associated receiving portion 14 to extend away from the housing 22.
- the engagement mechanism 11 typically further comprise an installation indicator for indicating when the mechanism 11 has securely engaged between the two rungs 4.
- This typically comprises a first marking 82 on the movable portion 21 and a second marking 83 on the adjuster 80 which align when sufficient clamping force has been applied by the mechanism 11.
- the adjuster 80 can be moved away from the strut 24, typically by screwing, to further compress the resilient element 81 and increase the clamping force, until the markings align 82, 83.
- Figure 14 shows a perspective view of a telescopic cross member 99 attached to the abutting portion by fasteners which in this embodiment are pins 95.
- the cross member includes a hollow section with pads 15 for engagement with a surface.
- the invention can be utilised in the construction industry, or any industry which requires a ladder to be climbed.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17743497.4A EP3408487B1 (en) | 2016-01-27 | 2017-01-27 | Device for stabilising a ladder, and a ladder |
AU2017210758A AU2017210758B2 (en) | 2016-01-27 | 2017-01-27 | Device for stabilising a ladder, and a ladder |
US16/073,260 US10995549B2 (en) | 2016-01-27 | 2017-01-27 | Device for stabilising a ladder, and a ladder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2016900229A AU2016900229A0 (en) | 2016-01-27 | Device For Stabilising A Ladder, And A Ladder | |
AU2016900229 | 2016-01-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017127895A1 true WO2017127895A1 (en) | 2017-08-03 |
Family
ID=59396915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2017/050068 WO2017127895A1 (en) | 2016-01-27 | 2017-01-27 | Device for stabilising a ladder, and a ladder |
Country Status (4)
Country | Link |
---|---|
US (1) | US10995549B2 (en) |
EP (1) | EP3408487B1 (en) |
AU (1) | AU2017210758B2 (en) |
WO (1) | WO2017127895A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210207436A1 (en) * | 2020-01-02 | 2021-07-08 | Christopher Taylor | Ladder Stabilization Apparatus and a Stable Ladder |
US11753869B2 (en) | 2020-04-11 | 2023-09-12 | Coast Marine & Industrial Supply | Knotless security device |
US11662181B1 (en) * | 2021-08-05 | 2023-05-30 | United States Of America As Represented By The Secretary Of The Army | Survivability and assault multi-tool systems and methods |
USD1006259S1 (en) * | 2023-05-05 | 2023-11-28 | Michael Farris | Adjustable ladder stabilization device |
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2017
- 2017-01-27 AU AU2017210758A patent/AU2017210758B2/en active Active
- 2017-01-27 US US16/073,260 patent/US10995549B2/en active Active
- 2017-01-27 EP EP17743497.4A patent/EP3408487B1/en active Active
- 2017-01-27 WO PCT/AU2017/050068 patent/WO2017127895A1/en active Application Filing
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US4359138A (en) * | 1978-12-01 | 1982-11-16 | Kuemmerlin Walter | Supporting device for ladders |
US20050139425A1 (en) | 2003-12-04 | 2005-06-30 | Thomas Merle A. | Ladder stabilizer |
US20100213009A1 (en) * | 2008-04-01 | 2010-08-26 | Ruben Guinovart | Stabilizing mechanism for ladders |
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Also Published As
Publication number | Publication date |
---|---|
EP3408487A4 (en) | 2019-10-09 |
EP3408487B1 (en) | 2021-03-03 |
AU2017210758B2 (en) | 2021-07-29 |
EP3408487A1 (en) | 2018-12-05 |
US20190048663A1 (en) | 2019-02-14 |
US10995549B2 (en) | 2021-05-04 |
AU2017210758A1 (en) | 2018-09-06 |
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