EP0081404B1 - Dispositif d'écartement et de stabilisation pour échelle - Google Patents

Dispositif d'écartement et de stabilisation pour échelle Download PDF

Info

Publication number
EP0081404B1
EP0081404B1 EP19820402045 EP82402045A EP0081404B1 EP 0081404 B1 EP0081404 B1 EP 0081404B1 EP 19820402045 EP19820402045 EP 19820402045 EP 82402045 A EP82402045 A EP 82402045A EP 0081404 B1 EP0081404 B1 EP 0081404B1
Authority
EP
European Patent Office
Prior art keywords
chain
ladder
elements
plane
tube
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
EP19820402045
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0081404A3 (en
EP0081404A2 (fr
Inventor
Jean François Archer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alufort SA
Original Assignee
Alufort SA
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 Alufort SA filed Critical Alufort SA
Publication of EP0081404A2 publication Critical patent/EP0081404A2/fr
Publication of EP0081404A3 publication Critical patent/EP0081404A3/fr
Application granted granted Critical
Publication of EP0081404B1 publication Critical patent/EP0081404B1/fr
Expired legal-status Critical Current

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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

  • spacer devices which are fixed on the upper part of the ladder and by means of which this upper part can bear on a vertical wall while being kept apart from this wall.
  • These spacer devices generally have a bearing surface greater than the width of the ladder so that they also offer the advantage of increasing the stability of this ladder.
  • the ladder spacers so far produced are most often constituted by a pair of grab bars which are joined to one another by two gutters which can be fitted onto two adjacent bars of the ladder, by a pair of grab bars, each of which can be attached to a ladder upright or carries hooks that can be fitted onto bars of this ladder, or by a U-shaped support element, the central branch of which can be fixed to the uprights of said ladder.
  • these various devices have the disadvantage of being either long to install, or not very safe.
  • US Pat. No. 3,792,750 describes a spacer device comprising two removable support elements, each of which carries, at one of its ends, two cylindrical portions spaced from one another by a distance equal to a multiple of l 'gap between two adjacent hollow bars, and outer diameter substantially equal to the inner diameter of the ends of these bars.
  • the cylindrical portions of the two elements are fitted into the opposite ends of the bars of the ladder so that, when the ladder is supported on a wall, the supporting elements come into contact with this wall at points opposite to the cylindrical portions.
  • the two supporting elements of the spacer device of U.S. Patent 3,792,750 are joined to each other by a bar which is fixed to the elements by screws and nuts.
  • the length of the bar must correspond to the length of the bars so that a given device can only be mounted on a ladder of given width.
  • the width of the scales is very variable from one scale to another and even from one end of the scale to the opposite end; this is particularly the case with sliding ladders, the upper end of which is generally narrower than the lower end resting on the ground.
  • the spacer device is dismantled, it frequently happens that either a screw or a nut is lost and, for this simple fact, the device becomes unusable.
  • US-A-2889099 describes a chain for adjusting the opening angle of a stepladder. This chain is fixed at one end and introduced into a hole for adjusting its length.
  • the present invention relates to a ladder spacer device which overcomes the aforementioned drawback.
  • the device according to the invention is characterized in that the two support elements are connected to each other by a chain, a first end of which passes through an adjustment hole having a first part allowing the chain to slide freely and a second part allowing the chain to be immobilized, said adjustment hole being provided in one of the elements and the chain is terminated by a ferrule whose dimensions are greater than those of the hole so that the chain cannot be separated of the support element, the second end of the chain being either fixed to the other support element, or connected to the latter in the same way as the first end of said chain is to the first element d 'support.
  • the chain may be with links, in which case the adjustment hole may comprise a substantially circular part whose diameter is substantially equal to the width of the links and which is extended by an oblong opening of width substantially equal to the thickness of these links.
  • the cylindrical portions of a support element preferably form an angle greater than 90 ° with the plane of this element. Under these conditions, the ends of the support elements opposite the cylindrical portions, which come into contact with the wall on which the ladder must bear, are spaced from each other by a distance greater than the width of scale, which increases stability.
  • Each of the support elements can be constituted by a round or tube which is folded at an intermediate point of its length and whose ends are themselves folded relative to the plane of the folded central portions of the round or tube so as to be parallel to each other and located on the same side of this plane. These connected ends constitute the cylindrical portions intended to be fitted into the bars of the ladder.
  • the two central portions of the round or tube are advantageously connected to each other by a flat iron comprising the hole and the oblong adjustment opening.
  • the spacer and stabilization device is intended for a ladder comprising two uprights 1 and hollow bars 2, the ends of which pass through the uprights and are crimped outside thereof.
  • the device comprises two support elements 3a and 3b.
  • Each of these support elements consists of a round or tube folded substantially in its middle part, at an acute angle, so as to form two branches 4 and 5.
  • Each of these branches has an extension 6 or 7 which makes a angle greater than 90 °, for example 120 °, with the plane of the branches 4 and 5.
  • These extensions are parallel to each other and located on the same side of this plane, on one side for the part 3a and on the opposite side for part 3b; their spacing is equal to that of two adjacent bars 2 and their outside diameter is substantially equal to the inside diameter of these bars.
  • each of the support elements are connected to each other by a plant 8 provided with a hole 9 extended laterally by an oblong opening 10.
  • the elements 3a and 3b are joined to each other by a chain with links 11.
  • the diameter of the holes 9 is slightly greater than the width of the links of the chain 11, while the width of the openings 10 is slightly greater than the thickness of these links.
  • the chain 11 can slide freely in the holes 8, but is immobilized longitudinally relative to the support piece 3a or 3b if one of its links is engaged in the opening 10 of the flat iron 8 of this support piece; one can also adjust the length of the part of the chain 11 extending between the elements 3a and 3b.
  • the chain 11 is terminated at each of its ends by a stopper tip 12 whose dimensions are greater than those of the holes 9 so that the chain cannot separate from the support pieces 3a and 3b.
  • one of the ends of the chain 11 could be permanently fixed to the neighboring support element 3a or 3b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)
EP19820402045 1981-12-03 1982-11-08 Dispositif d'écartement et de stabilisation pour échelle Expired EP0081404B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8122971A FR2517735A1 (fr) 1981-12-03 1981-12-03 Dispositif d'ecartement et de stabilisation pour echelle
FR8122971 1981-12-03

Publications (3)

Publication Number Publication Date
EP0081404A2 EP0081404A2 (fr) 1983-06-15
EP0081404A3 EP0081404A3 (en) 1983-09-07
EP0081404B1 true EP0081404B1 (fr) 1985-01-30

Family

ID=9264808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820402045 Expired EP0081404B1 (fr) 1981-12-03 1982-11-08 Dispositif d'écartement et de stabilisation pour échelle

Country Status (3)

Country Link
EP (1) EP0081404B1 (enrdf_load_stackoverflow)
DE (1) DE3262167D1 (enrdf_load_stackoverflow)
FR (1) FR2517735A1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8717870D0 (en) * 1987-07-28 1987-09-03 Ronnoco Eng Ltd Securing means for ladder
US4949810A (en) * 1988-10-03 1990-08-21 Dwinnell Wayne F Attachment to stabilize and expand the use of hollow rung ladders
GB9501796D0 (en) * 1995-01-25 1995-03-22 Bull Jamie 'Bulisario' corner ladder stay
DE19701497A1 (de) * 1997-01-17 1997-07-03 Horst Laug Einklappbare und teleskopartig verstellbare Stabilisierungsstützen für Steh-, Mehrzweck- und Anlegeleitern
CA2268612C (en) * 1999-04-12 2008-09-23 William Stephen Smith Ladder accessories
US6167989B1 (en) 1999-07-16 2001-01-02 Koock Elan Jung Ladder safety device
US6152262A (en) * 1999-08-21 2000-11-28 Jung; Koock E. Ladder top stabilizer device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE543390C (de) * 1932-02-04 Heinrich Schwarzer Vorrichtung zum gelenkigen Befestigen von abnehmbaren Stuetzen an Freistelleitern
DE669248C (de) * 1938-12-20 Adam Schmitt Sicherheitsknebelverschluss fuer Viehketten
US2539664A (en) * 1946-11-07 1951-01-30 Sun Oil Co Collapsible safety guard for derrick ladders
US2889099A (en) * 1955-04-01 1959-06-02 M W P Appliances Inc Ladder construction
FR1202991A (fr) * 1958-04-18 1960-01-14 Attache de sécurité notamment pour attacher des animaux avec une chaîne
FR1351393A (fr) * 1962-07-13 1964-02-07 Support d'échelle
US3568801A (en) * 1969-02-28 1971-03-09 H D Werner Co Inc Ladder stabilizing device
US3792750A (en) * 1973-02-20 1974-02-19 B Madison Safety device for ladders

Also Published As

Publication number Publication date
FR2517735A1 (fr) 1983-06-10
DE3262167D1 (en) 1985-03-14
FR2517735B1 (enrdf_load_stackoverflow) 1984-07-13
EP0081404A3 (en) 1983-09-07
EP0081404A2 (fr) 1983-06-15

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