EP1109987A1 - Structure support portative utilisable en tant qu'echelle ou escabeau - Google Patents
Structure support portative utilisable en tant qu'echelle ou escabeauInfo
- Publication number
- EP1109987A1 EP1109987A1 EP99936691A EP99936691A EP1109987A1 EP 1109987 A1 EP1109987 A1 EP 1109987A1 EP 99936691 A EP99936691 A EP 99936691A EP 99936691 A EP99936691 A EP 99936691A EP 1109987 A1 EP1109987 A1 EP 1109987A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stringer
- structure according
- ramp
- steps
- feet
- 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.)
- Granted
Links
Classifications
-
- 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
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/382—Tripod ladders
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
- E06C7/081—Rungs or other treads comprising anti-slip features
Definitions
- the present invention relates to a portable support structure that may be foldable, usable as a ladder or stepladder to allow a person to move, in particular to climb or descend, for example to reach otherwise inaccessible objects or to overcome obstacles.
- These uprights have, at one of their ends, bearing surfaces on the ground possibly equipped with pads.
- the two other ends of the uprights are, for their part, intended to come to bear on a bearing surface, for example on a vertical wall (in the case of a simple ladder) or are articulated to a support structure which may consist of a second ladder (case of the double scale).
- the uprights constitute strings carrying steps in place of steps.
- the support structure comprises two parallel uprights connected to each other by crosspieces as well as to the stringers by disconnectable bracing means.
- this support polygon is variable depending on the location of the scale support points, while nothing allows the user to indicate the position of its center of gravity vis-à-vis this polygon.
- the user can therefore be in imbalance and fall without a warning sign warning him of the danger.
- this structure comprises at least:
- a stringer the two ends of which are intended to come to bear on two fixed elements, one of these elements being able to consist of the ground and the other, a fixed object situated above the ground,
- a ramp integral with the stringer, which extends vertically from the latter, at a distance from the steps less than the average length of a leg, so that a user can move on the steps by stepping over the ramp.
- the user can hold onto the structure by squeezing the ramp between his legs, without having to use his hands, which remain free for example to carry out work.
- the steps may include means for lateral blocking of the feet so as to ensure a better structure / user connection, when the latter clamps the ramp between his legs.
- Figures 1 and 2 are perspective views 3/4 front (Figure 1) and 3/4 rear ( Figure 2) of a ladder / stepladder according to the invention
- Figure 3 is a front view of the ladder / stepladder shown in Figures 1 and 2;
- Figure 4 shows the ladder / stepladder in the folded state.
- the stringer 1 of the ladder / stepladder is constituted by two longitudinal members 2, 3 each consisting of an aluminum profile of rectangular section. These two longitudinal members 2, 3 extend parallel to each other and are joined to one another by means of two series of oblique bracing rods 4, 5 - 4 ', 5', fixed on the side members 2, 3 by their ends.
- This spar 3 carries a ramp 7 of circular section which extends above the stringer 1 in the same vertical plane.
- the ramp 7 is fixed to the stringer 1 by a series of collars fixed to the spar 3. In its upper part, the ramp 7 forms an elbow 9 partially surrounding the end of the spar 3.
- the spar 2 supports, for its part, a succession of double steps Mi, M'i - M 2 , M ' 2 - M 3 , M' 3 which each extend transversely on either side of the vertical plane of the stringer 1.
- these double steps Mi, M'i - M 2 , M ' 2 - M 3 , M' 3 each include two plates P which extend horizontally on either side of the plane of the stringer 1 and which are carried by tabular crosspieces T coming to be fixed by bolting on a pair of horizontal rods 4, 5.
- This pair of horizontal links 4, 5 is here braced by a pair of oblique links 4 ', 5' which extends in the gap formed between said links 4, 5 and the step which is located just below.
- the plates P are provided with non-slip raised elements and each have, at their lateral edges, an upward fold R serving to prevent the feet of the user from being able to slip laterally.
- the pair of horizontal rods 4, 5 located at the upper end of the stringer 1 supports a shelf TB also non-slip on which an object, for example a paint can, can be placed.
- This pair of rods 4 ", 5", of larger cross section than those of the rods 4, 5, carries below the shelf a cross-member TR on the ends of which two feet Pi, P 2 terminated at their lower ends by pads on the ground 11, 12.
- these feet Pi, P 2 form with the spar 3 a tripod which delimits a prismatic volume inside which the steps Mi, M'i - M 2 , M ' 2 - M 3 , M' 3 are located below the spar 3.
- the two feet P 15 P 2 are secured to each other by means of a disconnectable cross-member TD.
- the ladder / stepladder offers the user unequaled stability and security.
- the ladder / stepladder Due to its tripod structure, the ladder / stepladder can be placed on possibly uneven floors, it being understood that the user will endeavor to arrange it so that its plane of symmetry is vertical. In all cases, the user mounted on the ladder / stepladder can "be one with it” by squeezing the ramp between his legs. As a result, the vertical plane of symmetry of the user in which his center of gravity is located is reduced to the vertical plane of symmetry of the ladder / stepladder (bisector plane of the dihedron formed by the stringer 1 and the two feet Pi, P 2 ).
- the vertical of the center of gravity of the ladder / stepladder user assembly therefore necessarily passes inside the support polygon of the ladder / stepladder.
- the stability of the assembly is therefore guaranteed.
- ladder / stepladder Another important advantage of the previously described ladder / stepladder is that it can be folded up to occupy, in the folded state, only a very small volume. In this position, the user can use the ramp 7 to carry the ladder / stepladder.
- the two feet can come back against the stringer 1, so that the volume of the assembly, in the folded state, is reduced substantially to the dimensions of the stringer 1 and the steps Mi, M'i - M 2 , M ' 2 - M 3 , M' 3 ( Figure 4).
- the steps Mi, M'i - M 2 , M ' 2 - M 3 , M' 3 may occupy positions offset in height by approximately 21 cm, the stringer being inclined by approximately 30 ° .
- the width of the stringer 1 (distance separating its upper and lower edges) is such that the vertical plumb with the first third of a step intersects the upper edge of the "stringer" at a height of about 40 cm.
- the ramp 7 is located about 40 cm above the steps so as to be able to come into contact between the calves and the user's knees.
- each foot Pi, P 2 of the ladder / stepladder may be adjustable in length so as to allow adjustment of verticality, in particular in the case of uneven ground.
- each foot Pi, P 2 may comprise two elements which telescopically interlock with one another and fixing means making it possible to secure the two elements in the axial position corresponding to the length of the foot which is desire to obtain.
- the aforementioned ramp may consist of the upper spar 3 of the stringer 1. This may be extended beyond its upper end by a section of ramp which engages telescopically in the spar 3. A multiposition axial locking of this section in the spar can then be provided by any known fixing means.
- the upper end of this section may be fitted with a hook or the like, which can be used to hang an object, for example a pot or a basket.
- the feet will be oriented so that the upper end of the stringer 1 is located substantially vertically of the barycenter of the triangle formed by the pads 6, 11, 12.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9811176 | 1998-09-04 | ||
FR9811176A FR2783012B1 (fr) | 1998-09-04 | 1998-09-04 | Structure support portative utilisable en tant qu'echelle ou escabeau |
PCT/FR1999/001935 WO2000014373A1 (fr) | 1998-09-04 | 1999-07-30 | Structure support portative utilisable en tant qu'echelle ou escabeau |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1109987A1 true EP1109987A1 (fr) | 2001-06-27 |
EP1109987B1 EP1109987B1 (fr) | 2004-08-18 |
Family
ID=9530201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99936691A Expired - Lifetime EP1109987B1 (fr) | 1998-09-04 | 1999-07-30 | Structure support portable et repliable utilisable en tant qu'echelle ou escabeau |
Country Status (6)
Country | Link |
---|---|
US (1) | US6386320B1 (fr) |
EP (1) | EP1109987B1 (fr) |
AU (1) | AU5169899A (fr) |
DE (1) | DE69919551D1 (fr) |
FR (1) | FR2783012B1 (fr) |
WO (1) | WO2000014373A1 (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2784115B1 (fr) | 1998-10-05 | 2000-12-15 | Rhodia Chimie Sa | Composition de revetements contenant des silicones fonctionnalisees |
US6874598B1 (en) | 2002-10-15 | 2005-04-05 | William H. Baker | Ergonomically improved tripod stepladder |
US6951265B2 (en) * | 2003-08-04 | 2005-10-04 | Ballymore Company, Inc. | Foldable stairway ladder |
WO2014070321A1 (fr) | 2012-11-01 | 2014-05-08 | Maruti Gupta | Signalisation d'exigences de qos et de préférence de puissance d'ue dans des réseaux lte-a |
US9689204B2 (en) | 2013-02-26 | 2017-06-27 | Tokuo AOI | Stepladder |
JP1519488S (fr) | 2014-07-10 | 2015-03-16 | ||
AU2015367280B2 (en) * | 2014-12-15 | 2017-06-22 | Vertical Stairway Pty Ltd | A vertically orientated ladder apparatus for allowing a climber to adopt an improved climbing stance in use |
USD757959S1 (en) | 2015-04-28 | 2016-05-31 | Tokuo AOI | Stepladder |
USD758615S1 (en) | 2015-04-28 | 2016-06-07 | Tokuo AOI | Stepladder |
USD765269S1 (en) | 2015-04-28 | 2016-08-30 | Tokuo AOI | Stepladder |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US68193A (en) * | 1867-08-27 | Improvement in elevating-block | ||
US322414A (en) * | 1885-07-21 | Step-ladder | ||
US791509A (en) * | 1903-12-12 | 1905-06-06 | John G Soergel | Step-ladder. |
US1511580A (en) * | 1924-02-18 | 1924-10-14 | Prince Willis | Self-supporting ladder |
US1976345A (en) * | 1932-10-03 | 1934-10-09 | Hruby Frank | Ladder |
DE713545C (de) * | 1938-07-01 | 1941-11-10 | Arno Fischer | Leitertreppe |
FR1184292A (fr) * | 1957-10-14 | 1959-07-20 | échelle avec pied orientable pour arbres fruitiers ou pour tout autre application | |
US4199040A (en) * | 1979-01-22 | 1980-04-22 | The Laitram Corporation | Ship ladder |
US4316524A (en) * | 1980-06-12 | 1982-02-23 | The Laitram Corporation | Two-speed ladder |
US4509617A (en) * | 1981-04-27 | 1985-04-09 | The Laitram Corporation | Stair having alternate half treads |
US4535871A (en) * | 1981-09-28 | 1985-08-20 | The Laitram Corporation | Unitary stairway |
US4798262A (en) * | 1986-09-12 | 1989-01-17 | Paul Margolies | Tripodal support |
US5085291A (en) * | 1991-01-22 | 1992-02-04 | Narramore Daniel O | Safety ladder |
US5125476A (en) * | 1991-09-16 | 1992-06-30 | Merrick Harry G | Ladder apparatus and hinge system therefor |
US6206139B1 (en) * | 1996-10-17 | 2001-03-27 | Robert C. Bogart, Jr. | Folding tripod ladder having extendable legs |
DE29712753U1 (de) * | 1997-07-18 | 1997-09-11 | Söll GmbH, 95028 Hof | Versenkbare Verlängerung der Führungsschiene einer Steigschutzvorrichtung |
US6076634A (en) * | 1999-01-14 | 2000-06-20 | Simon; Steve J. | Mast ladder assembly |
-
1998
- 1998-09-04 FR FR9811176A patent/FR2783012B1/fr not_active Expired - Fee Related
-
1999
- 1999-07-30 DE DE69919551T patent/DE69919551D1/de not_active Expired - Lifetime
- 1999-07-30 WO PCT/FR1999/001935 patent/WO2000014373A1/fr active IP Right Grant
- 1999-07-30 EP EP99936691A patent/EP1109987B1/fr not_active Expired - Lifetime
- 1999-07-30 AU AU51698/99A patent/AU5169899A/en not_active Abandoned
- 1999-07-30 US US09/786,295 patent/US6386320B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0014373A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2000014373A1 (fr) | 2000-03-16 |
US6386320B1 (en) | 2002-05-14 |
FR2783012B1 (fr) | 2000-10-27 |
FR2783012A1 (fr) | 2000-03-10 |
DE69919551D1 (de) | 2004-09-23 |
AU5169899A (en) | 2000-03-27 |
EP1109987B1 (fr) | 2004-08-18 |
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