EP2115263A1 - Echelle comportant deux montants et un pied de rallonge appuyant sur le sol - Google Patents

Echelle comportant deux montants et un pied de rallonge appuyant sur le sol

Info

Publication number
EP2115263A1
EP2115263A1 EP08705198A EP08705198A EP2115263A1 EP 2115263 A1 EP2115263 A1 EP 2115263A1 EP 08705198 A EP08705198 A EP 08705198A EP 08705198 A EP08705198 A EP 08705198A EP 2115263 A1 EP2115263 A1 EP 2115263A1
Authority
EP
European Patent Office
Prior art keywords
leg
extension leg
ladder
lateral tilt
locking
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.)
Withdrawn
Application number
EP08705198A
Other languages
German (de)
English (en)
Inventor
Jan Wallenius
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2115263A1 publication Critical patent/EP2115263A1/fr
Withdrawn legal-status Critical Current

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
    • E06C7/42—Ladder feet; Supports therefor
    • E06C7/44—Means for mounting ladders on uneven ground

Definitions

  • the present invention relates to a ladder with two side legs and a number of runges extending between the side legs, and at the foot end of one of the side legs an extension leg with an anti-skid device to be pressed against a supporting surface, which extension leg is slidably mounted in a holding device fixedly attached to said one side leg, which holding device is provided with a locking device that prevents sliding downwards of the one side leg when the ladder is loaded, and a manually operated release device for permitting adjustment of the extension leg.
  • Such a ladder is known e.g. by the US patent No. 4,766,976, published in year 1988 , which discloses a locking device with a number of locking rings stacked on the extension leg, which locking rings by a compression spring are urged in oblique, self-locking position against a protrusion when the extension leg is pressed upwards in relation to the side leg at loading of the ladder.
  • the locking device is released by pressing a finger against the upper edge part of the locking rings, such that the extension leg may be adjusted in relation to a possible laterally inclined ground surface, after which the locking device is actuated by removing the finger from the locking rings.
  • the ladder can be used on uneven ground and on steps, but it cannot be equipped with a lateral tilt protecting device in the shape of a cross beam lying on the ground and attached to the foot ends of the extension leg and the other side leg, because the locking rings will be free to slide and permit tilting of the ladder over the side leg having its foot end attached directly to the lateral tilt protecting device.
  • a functioning like that is prevented by using a ladder later suggested and described in the Swedish patent SE 0600756-1.
  • This ladder has side legs which both are equipped with slidable extension legs provided with locking devices as described above and mutually interconnected by a flexible connection running in a path along the side legs and between the side legs permitting the extension legs to move in opposite directions a decided maximal distance and brings about a locking of both the locking devices in the manner described above when a tightening occurs of the flexible connection when both the extension legs are pressed at the same time against a supporting surface.
  • the ladder is characterized in that both the locking devices further are equipped with at least one further locking ring, which is adapted to lock in the opposite direction in relation to the first locking rings and simultaneously with the first locking rings be pressed in locking ' direction when the extension legs are pressed against a surface.
  • Those foot ends are detachably connected with a lateral tilt protecting device in the shape of a cross-beam, which accordingly can transmit the load of the ladder to the support surface, which may be the ground or a staircase landing etc.
  • a ladder of this type can be utilized with or without the lateral tilt protecting device, and in the former case tilting is prevented in both directions due to the fact that both extension legs are fixedly secured against pushing as well as pulling forces.
  • the construction with the flexible interconnection between the extension legs and the carefully adjusted connection with the locking devices in order to achieve locking of the two systems of locking rings in the two locking devices when the lateral tilt protecting device is set down on the support results in a ladder that is complicated to manufacture and to put together, and as a consequence unsuitably expensive.
  • the object of the invention is to achieve a ladder of the kind mentioned by way of introduction above, which can be equipped with a lateral tilt protecting device, and which is substantially easier and cheaper to manufacture and maintain than the previously known ladders.
  • the locking device attached to the said one side leg is designed to lock the extension leg in both directions, and that the extension leg is provided with a device for detachable interconnection with a lateral tilt protecting device, which further is provided with a device for detachable interconnection with the foot end of the other side leg.
  • the ladder according to the invention has only one slidably journalled extension leg, and this extension leg is normally locked to the side leg in a reliable way by a locking device, which is manually released only when the position of the extension leg has to be adjusted.
  • the locking device may be of some known kind, e.g. in the shape ofa series of notches along the extension leg, and perpendicular to those a latch bolt journalled in the holding device and pressed by a spring into a hatch positioned in line with the latch bolt, which can be pulled-out a bit for permitting the extension leg to be adjusted.
  • the locking device is preferably, however, designed according to claim 2 with a pair of V- positioned locking rings, which are slidably mounted on the extension leg and are positioned between two stop surfaces of the holding device, which stop surfaces engage the outside surfaces of the pair of locking rings at the closest to each other positioned edge portions, and the pair of locking rings are spaced apart by a compression spring between the pair of locking rings.
  • either of the extension leg mounted on one of the side legs or the foot end of the other side leg is equipped with a control pin directed perpendicular to the lateral tilt protecting device, which control pin is journalled slidable in an arched control slit extending in the same direction as the lateral tilt protecting device in a bracket attached to the lateral tilt protecting device.
  • the control slit has a guide surface with such a curvature that at all positions of the lateral tilt protecting device in relation to the ladder the control pin engages a part of the guide surface that is perpendicular to the push or pull direction of the control pin.
  • Figure Ia and b is a front view of a ladder with mounted lateral tilt protecting device
  • Figure 2a and b is a view of two sides of an extension leg in the position shown in Fig.Ib,
  • Figure 3a and b is a view from two sides of the extension leg shown in Fig.2a and b, after pivoting 180°,
  • Figure 4a and b is a front view of a ladder equipped with a mounted lateral tilt protecting device of a different design
  • Figure 5a and b is the same view as shown in Fig. 4a and b of an example of a further embodiment of a mounted lateral tilt protecting device.
  • the ladder shown in Fig.Ia has two side legs 1,2 connected by a number of rungs 3.
  • a holding device 4 is attached to one of the side legs 2, in which holding device an extension leg 5 is slidably journalled in parallel with the side leg 2.
  • the lower end of the extension leg 5 is connected by a bolt 6 with one end of a link 7.
  • the other end of the link is by a bolt 8 connected with a lateral tilt protecting device 9 in the shape of a cross-beam.
  • the lower end of the other side leg 1 is connected with the lateral tilt protecting device 9 by a fork-shaped coupling link 10, which by a coupling bolt 11 is attached to the lateral tilt protecting device 9 and with a part is inserted into the end of the side leg 1 and is secured to it by a bolt 12.
  • Fig. 2a and b discloses the extension leg 5 with associated holding device 4 and locking device 13.
  • the holding device is a steel band, which has been bent backwards and forwars such that three parts are formed in which apertures 14 are made corresponding to the cross section of the extension leg 5.
  • the extension leg 5 has been introduced down through the two upper apertures of the holding device, after which the locking device 13 consisting of a pair of three V-shaped locking rings 15,16 with an intermediate compression spring 17 has been slided onto the lower end of the extension leg 5 at the same time as said lower end is displaced downwards and inserted into the lowermost aperture 14.
  • the holding device 4 has two corner parts 21 forming contact surfaces for the locking rings 15,16 such that the locking rings are kept in V-shape position under the influence of the compression spring 17, which has a pressure force adapted to keep the extension leg 5 in self-locking condition in the upward direction by the locking rings 15 and in the downward direction by the locking rings 16.
  • the extension leg 5 is provided with the bolt 6 for connecting the extension leg with the lateral tilt protecting device 9.
  • the opposed end of the extension leg is provided with a wobbly mounted anti-skid device 18, which makes it possible, after pivoting the extension leg 180°, to use the ladder without a lateral tilt protecting device 9.
  • the holding device 4 is attached to the side leg 2 by two bolts 19,20. If the ladder is to be placed on a support surface on which a lateral tilt protecting device is unusable, for instance a staircase, it is possible to ease off a the bolts 19,20 and after pivoting the holding device together with the extension leg 180° to be secured again in the existing holes in the side leg 2, as shown in Figs. 3a and b,
  • Figs.4a and b show an embodiment similar to the embodiment shown in Figs.Ia and b with the difference that the link 7 in Figs.Ia and b has been replaced by a fixed bracket 31, which is attached to the lateral tilt protecting device 9 by a mounting bolt 32.
  • the bracket has an arched control slit 33 in which a control pin 34, attached to the extension leg 5, is slidable bearing against a lower guide surface 35 and an upper guide surface 36.
  • the guide surfaces are shaped such, that the control pin 34 always, independent of the inclination of the lateral tilt protecting device, bears against a part of the guide surfaces 35,36 which is perpendicular to push or pull direction of the control pin.
  • the extension leg 5 can be pivoted to a coupling link 37 which is fixedly attached to the lateral tilt protecting device 9, as shown in Figs.5a and b.
  • a fork connection 38 is attached to the lower end of the side leg 1, to which connection a control pin 39 is attached.
  • a bracket 40 is attached to the lateral tilt protecting device 9 by mounting bolts 41 and presents an arched control slit 42 through which the control pin 39 extends with the same function as described above with reference to the control slit 33.
  • extension leg 5 may, as an alternative, be pulled out from the holding device 4 and after pivoting 180° pushed into the holding device 4 again, in which case there is no need for the holding device to be loosened. It is of course also possible to design the the anti-skid device 18 such, that it can replace the link 7 when necessary for connection with the lateral tilt protection device.

Landscapes

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

Abstract

L'invention concerne une échelle comportant deux montants (1, 2) et, à l'extrémité inférieure de l'un des montants (2), un pied de rallonge (5) monté coulissant dans un dispositif de retenue (4) qui est fixé audit montant (2), le dispositif de retenue étant pourvu d'un dispositif de verrouillage (13) qui empêche ce montant de glisser vers le bas lorsque l'échelle est chargée; et un dispositif de déverrouillage actionné manuellement, qui permet de régler le pied de rallonge (5). Le dispositif de verrouillage est, selon l'invention, conçu pour verrouiller le pied de rallonge (5) dans les deux sens, ledit pied de rallonge étant pourvu d'un dispositif (6) qui s'assemble de manière détachable avec un dispositif de protection (9) contre l'inclinaison latérale, ce dernier étant en outre équipé d'un dispositif (10, 11) s'assemblant de manière détachable à l'extrémité inférieure de l'autre montant (1).
EP08705198A 2007-01-16 2008-01-14 Echelle comportant deux montants et un pied de rallonge appuyant sur le sol Withdrawn EP2115263A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0700080A SE0700080L (sv) 2007-01-16 2007-01-16 Stege med sidostycken och ett mot marken ansättbart förlängningsben
PCT/SE2008/000025 WO2008088268A1 (fr) 2007-01-16 2008-01-14 Echelle comportant deux montants et un pied de rallonge appuyant sur le sol

Publications (1)

Publication Number Publication Date
EP2115263A1 true EP2115263A1 (fr) 2009-11-11

Family

ID=38814573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08705198A Withdrawn EP2115263A1 (fr) 2007-01-16 2008-01-14 Echelle comportant deux montants et un pied de rallonge appuyant sur le sol

Country Status (3)

Country Link
EP (1) EP2115263A1 (fr)
SE (1) SE0700080L (fr)
WO (1) WO2008088268A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE1100051A1 (sv) * 2011-01-25 2011-12-27 Jan Wallenius Stege med sidotippningsskydd
CN105317369B (zh) * 2015-10-08 2017-03-01 王广宁 采摘梯
NO20151343A1 (no) 2015-10-08 2017-04-10 Inventu As Anordning for nivellering av stiger, samt en strammeinnretning og festeinnretning for en slik stige.
IT201800001570A1 (it) * 2018-01-22 2019-07-22 F A C A L S R L Scala portatile.

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908796A (en) * 1974-10-04 1975-09-30 Mathew Hurwitz Self-levelling accessory for ladders
US4073367A (en) * 1976-09-30 1978-02-14 Utility Products, Inc. Level support guard
DE2931503A1 (de) * 1978-08-03 1980-03-06 Julius Fuchs Leiter
DE8406020U1 (de) * 1984-02-28 1984-05-30 Hailo-Werk Rudolf Loh Gmbh & Co Kg, 6342 Haiger Leiter
US4766976A (en) * 1987-08-28 1988-08-30 Emerson Electric Co. Ladder leg extender and leveler
DE3804306A1 (de) * 1988-02-09 1989-08-17 Herve Rousselot Stehleiter
JPH0279800U (fr) * 1988-12-05 1990-06-19
JP3536249B2 (ja) * 2000-03-02 2004-06-07 株式会社アルフア 梯子の支持装置
FR2816984B1 (fr) * 2000-11-23 2003-01-31 Francis Mugnier Escabeau plate-forme de grande largeur a positionnement rapide sur tous terrains
SE528788C2 (sv) * 2006-04-04 2007-02-13 Jan Folke Wallenius Stege med två sidostycken försedda med självinställande förlängningsben

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008088268A1 *

Also Published As

Publication number Publication date
SE529879C2 (sv) 2007-12-18
SE0700080L (sv) 2007-12-18
WO2008088268A1 (fr) 2008-07-24
WO2008088268A8 (fr) 2009-11-05

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