WO2002006623A1 - Dispositif de securite d'echelle - Google Patents

Dispositif de securite d'echelle Download PDF

Info

Publication number
WO2002006623A1
WO2002006623A1 PCT/IE2001/000091 IE0100091W WO0206623A1 WO 2002006623 A1 WO2002006623 A1 WO 2002006623A1 IE 0100091 W IE0100091 W IE 0100091W WO 0206623 A1 WO0206623 A1 WO 0206623A1
Authority
WO
WIPO (PCT)
Prior art keywords
ladder
safety device
arm
roof
stand
Prior art date
Application number
PCT/IE2001/000091
Other languages
English (en)
Inventor
Joseph Barrett
Daniel Barrett
Original Assignee
Joseph Barrett
Daniel Barrett
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Joseph Barrett, Daniel Barrett filed Critical Joseph Barrett
Priority to AU2001269396A priority Critical patent/AU2001269396A1/en
Publication of WO2002006623A1 publication Critical patent/WO2002006623A1/fr

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

Definitions

  • This invention relates to a safety device for stabilising a ladder when alighting from the ladder to a roof and vice versa.
  • a ladder safety device comprising stand-off means at or near the top of the ladder for bearing against a roof of a building and maintaining the ladder out of contact with the building such that a notional straight line joining the base of the ladder with the part of the stand-off means engaging the roof intersects the line of the roof, wherein the stand-off means comprises a pair of substantially rigid arms at or near the top of the ladder which diverge away from one side of the ladder so that the separation of the arms at their free ends is substantially greater than the separation of the ladder uprights, and wherein a respective load spreading member is mounted to the free end of each arm for rotation about two mutually perpendicular axes.
  • Fig. 1 is a front view of a ladder having a safety device according to a first embodiment of the invention placed up against a building for access to a sloping roof;
  • Fig. 2 is a side view of the ladder of Fig. 1;
  • Figs. 3A and 3B are side and front views respectively of one of the arm-support brackets of the first embodiment
  • Fig. 4 is a cross-section illustrating how the ar - support brackets are clamped to the ladder
  • Figs. 5A and 5B are side and plan views respectively of one of the arms of the first embodiment including X- shaped load spreader;
  • Fig. 6 illustrates a universal coupling between the X- shaped load spreader and the associated arm
  • Fig. 7 is a front view of a ladder having a safety device according to a second embodiment of the invention.
  • Fig. 8 is a cross-section, similar to Fig. 4, illustrating how the arm-support brackets are clamped to the extension members of Fig. 7.
  • a ladder 100 comprises a pair of parallel uprights 112 joined by rungs 114 in conventional manner.
  • a safety device 20 is rigidly clamped at or near the top of the ladder.
  • the safety device 20 comprises a pair of substantially rigid arms 122 which diverge symmetrically away from the plane of the ladder 110 on the side facing the building.
  • the separation of the arms 122 at their free ends is substantially greater than the separation of the uprights 112, preferably at least twice the separation of the uprights, such that the free ends of the arms lie laterally beyond the respective edges of the ladder.
  • the angle of divergence of the arms 122 is preferably about 60 degrees.
  • the ladder 110 is positioned such that the only contact with the building 18 is via the arms 122, which bear on the roof 16 and maintain the uprights 112 out of contact with the eaves 24.
  • the arms 122 are adjustable in length to accommodate different pitched roofs and, in order to prevent the arms from penetrating the roof from the load applied by the ladder and a person on it, each arm terminates in a respective elongated X-shaped shoe 128 which spreads the load across several roof tiles.
  • the entire device 220 is preferably manufactured from aluminium, except for friction material 148 (Fig. 5) on the shoes 128.
  • each X- shaped load spreader 128 is faced with resilient material 148, and each is mounted to the free end of an arm 122 by a respective joint 150 (Figs. 5 and 6) allowing rotation of the spreader 128 about two mutually perpendicular axes relative to the arm.
  • Each joint 150 comprises a collar 152 rigidly attached to the free end of the arm 122 and a member 154 passing through and rotatable in the collar about an axis A-A.
  • a lock screw 156 allows the member 154 to be releasably locked against rotation in any desired angular position relative to the collar 152.
  • the lower end of the member 154 has a pin 144 rotatably passing therethrough in a direction perpendicular to the axis A-A.
  • the pin 144 extends between two flanges 146 fixed to the load spreader 128.
  • the joint 150 allows the X-shaped load spreader 128 to adjust to a wide range of roof pitches.
  • Each arm 122 comprises two parts 122A, 122B telescoped one within the other to permit adjustment of the length of the arm. A particular length is fixed by aligning a selected one of a series holes 130A in the part 22A with a hole 13OB in the part 22B and inserting a pin 131 through both.
  • each arm 122 is rigidly clamped to a respective ladder upright by a respective bracket 132.
  • Each bracket 132 comprises a clamp 134 (Figs. 3 and 4) for embracing the upright 112 on three sides and a cluster of three sockets 136A, 136B and 136C angularly offset from the clamp 134 by different amounts.
  • Each socket 136A-C is in the form of a short length of reinforced hollow pipe for selectively receiving the inner end of the arm part 122B which is rigidly fixed therein by a bolt (not shown) passing through the selected socket 136A-C and part 122B.
  • the clamps 134 are rigidly fixed to the ladder uprights 112 by a bolt 140 which passes through a hole 160 in one clamp 134 into the interior of a hollow rung 114, where it screw- threadedly engages a barrel nut 142 fixed to and extending within the rung from the other clamp 134.
  • each bracket 134 provides multiple mounting choices for the relevant arm 122 whereby the orientation of the arms 122 relative to the ladder may be varied.
  • a particular pair of sockets 136A, 136B or 136C is chosen for receiving the arms 122 according to the situation at hand.
  • the sockets 136A point up along the roof and the arms 122 are attached to these sockets when a fully extended ladder is only one or two rungs above the eaves-shoot.
  • the sockets 136B correspond to the position where the arms 122 lie in a plane substantially normal to the longitudinal axis of the ladder, and are the sockets which would be used in a normal situation.
  • the sockets 136C angle down to suit a flat roof.
  • the ladder 100 includes two preferably telescopic aluminium extension members 200 removably bolted to the tops of the ladder uprights 112 and forming a rung-less upward extension of the ladder.
  • the arms 122 are clamped, via brackets 134 (not shown in Fig. 10), to the top ends of the extension members 200.
  • Each member 200 may be constructed as two 4-foot. box aluminium sections, one sliding within the other and lockable at various overall lengths by a pin or bolt passing through selected aligned holes in the two sections in the same manner as the arms 122.
  • Fig. 8 illustrates how the brackets 134 are clamped to the extension members 200 in a manner that also rigidly ties the top ends of the extension members together in the manner of a rung 202. This is necessary in the absence of actual rungs between the extension members .
  • a barrel bolt comprising two hollow cylindrical members 204, 206 screw-threaded one within the other is placed between the extension members 200 and the member 204 is rotated on the member 206 until the overall length of the barrel bolt equals the desired spacing of the members 200.
  • a continuous bolt 208, screw- threaded at each end, is passed through the barrel bolt 204, 206 and through two holes 210 in the extension members 200 so as to project from either side of the latter.
  • a respective clamp 134 is placed over each end of the bolt 208, the clamp surrounding the respective member 200 on three sides, and the whole assembly is clamped securely in place by nuts 212 screwed onto the opposite ends of the bolt 208 and tightened up against the clamps 134.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

L'invention concerne un dispositif de sécurité d'échelle comprenant des organes (20) de séparation appuyés contre le toit (16) d'un bâtiment (18) de façon que l'échelle ne soit pas en contact avec le bâtiment. Les organes de séparation comprennent une paire de bras (122) sensiblement rigides divergeant d'un côté de l'échelle de façon que la séparation des bras à leurs extrémités libres soit sensiblement supérieure à la séparation des montants de l'échelle. Un élément (128) de répartition de charge respectif en forme de X est monté sur l'extrémité libre de chaque bras de façon à tourner autour de deux axes mutuellement perpendiculaires.
PCT/IE2001/000091 2000-07-14 2001-07-13 Dispositif de securite d'echelle WO2002006623A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001269396A AU2001269396A1 (en) 2000-07-14 2001-07-13 Ladder safety device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IES2000/0577 2000-07-14
IE20000577 2000-07-14

Publications (1)

Publication Number Publication Date
WO2002006623A1 true WO2002006623A1 (fr) 2002-01-24

Family

ID=11042644

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IE2001/000091 WO2002006623A1 (fr) 2000-07-14 2001-07-13 Dispositif de securite d'echelle

Country Status (3)

Country Link
AU (1) AU2001269396A1 (fr)
IE (1) IES20010663A2 (fr)
WO (1) WO2002006623A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11149494B2 (en) 2018-10-09 2021-10-19 Torrgram Llc Ladder safety lock system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US799782A (en) * 1904-09-06 1905-09-19 John G Ellinger Ladder-support.
FR1121612A (fr) * 1955-01-27 1956-08-22 Stabilisateur d'échelle
US3288249A (en) * 1965-06-04 1966-11-29 Clyde W Gibson Gutter bridging ladder attachment
US5165501A (en) * 1991-07-25 1992-11-24 Donahey Howard E Ladder support attachment
DE29509890U1 (de) * 1995-06-19 1995-10-12 Laug, Horst, 49809 Lingen Gespreizte, verstellbare Abstützarme für Anlegeleitern
US5931259A (en) * 1996-12-17 1999-08-03 Hoey; Dale E. Safety ladder attachment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US799782A (en) * 1904-09-06 1905-09-19 John G Ellinger Ladder-support.
FR1121612A (fr) * 1955-01-27 1956-08-22 Stabilisateur d'échelle
US3288249A (en) * 1965-06-04 1966-11-29 Clyde W Gibson Gutter bridging ladder attachment
US5165501A (en) * 1991-07-25 1992-11-24 Donahey Howard E Ladder support attachment
DE29509890U1 (de) * 1995-06-19 1995-10-12 Laug, Horst, 49809 Lingen Gespreizte, verstellbare Abstützarme für Anlegeleitern
US5931259A (en) * 1996-12-17 1999-08-03 Hoey; Dale E. Safety ladder attachment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11149494B2 (en) 2018-10-09 2021-10-19 Torrgram Llc Ladder safety lock system

Also Published As

Publication number Publication date
AU2001269396A1 (en) 2002-01-30
IES20010663A2 (en) 2002-02-20

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