EP4528067B1 - Échelle avec échellons repliables - Google Patents

Échelle avec échellons repliables

Info

Publication number
EP4528067B1
EP4528067B1 EP24200747.4A EP24200747A EP4528067B1 EP 4528067 B1 EP4528067 B1 EP 4528067B1 EP 24200747 A EP24200747 A EP 24200747A EP 4528067 B1 EP4528067 B1 EP 4528067B1
Authority
EP
European Patent Office
Prior art keywords
ladder
rung
bolt
ladder section
foldable
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.)
Active
Application number
EP24200747.4A
Other languages
German (de)
English (en)
Other versions
EP4528067C0 (fr
EP4528067A1 (fr
Inventor
Prof. Mike Nicklas
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.)
Storbeck Isolierungen EK
Original Assignee
Storbeck Isolierungen EK
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 Storbeck Isolierungen EK filed Critical Storbeck Isolierungen EK
Publication of EP4528067A1 publication Critical patent/EP4528067A1/fr
Application granted granted Critical
Publication of EP4528067B1 publication Critical patent/EP4528067B1/fr
Publication of EP4528067C0 publication Critical patent/EP4528067C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • E06C1/387—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 having tip-up steps
    • 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
    • E06C1/32—Ladders with a strut which is formed as a ladder and can be secured in line with the ladder
    • 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

Definitions

  • the invention relates to a ladder.
  • Ladders are known in various designs.
  • a key characteristic of a ladder is its ease of transport from a storage location to an installation site.
  • a ladder must also meet the requirements of the installation site.
  • safety considerations dictate requirements for the rung width, depending on the ladder's length. Specifically, as the rungs length increases, and thus as one ascends to greater heights, a predetermined rung width must be maintained for each rung. This predetermined width can, however, far exceed the width of the ladder's stiles, meaning that the ladder's width is no longer determined by the stiles themselves but by the rungs positioned between them. This reduces the ladder's maneuverability. It also results in a less compact design during transport.
  • trestle ladders which are characterized by at least two ladder sections connected to each other, each section having rungs. This can particularly lead to the situation that, when the trestle ladder is folded, the stiles of the first ladder section and the second ladder section no longer lie against each other, but are misaligned due to the width of the rungs.
  • a ladder which has two stiles as clamping arms and steps arranged at intervals on them, the steps being rotatable by means of pins.
  • JP H06 36240 Y2 is described as a ladder in which a front end of a middle footplate can be lifted and rotated around a shaft as a pivot point, wherein the footplate is attached to a support frame which is lifted from bottom to top when the footplate is rotated, so that the top of the support frame is placed on the front end of the middle footplate.
  • the CN 116122716 A reveals a folding stool with footplates and a stool top, the stool top being rotatable about a joint and lockable in a position.
  • the object of the present invention is to provide a ladder with the smallest possible packing dimensions.
  • a ladder can have various construction features.
  • One possibility is a ladder consisting solely of a first section with at least two stiles.
  • a ladder can also be understood as one with multiple sections. It has ladder components.
  • the ladder can be an extendable ladder or a stepladder.
  • the ladder could be made of aluminum, for example. However, it's also conceivable that the ladder could be made of steel, magnesium, or an alloy of these metals. In particular, the stiles and the folding rungs could be made of such a material.
  • the stiles are designed to have a rectangular cross-section. Specifically, the stiles have a length that is equal to their width and depth. Accordingly, a longitudinal axis runs along their length. Furthermore, the stiles can be hollow. This means that the stiles are formed by a wall.
  • a hinged rung is arranged between the stiles. "Between the stiles" means that the rung is essentially positioned between the stiles.
  • the rung it is possible for the rung to be hollow inside. This means that the rung is essentially formed by a wall.
  • each rung has a guide element on the side facing the stiles, which forms the wall of the rung on the sides facing the stiles.
  • the guide element is designed to have a recess.
  • the guide element has a passage for the axis of rotation, so that the axis of rotation runs from the rung through the guide element into the stiles.
  • the recess of the guide element is designed in particular such that it is connected to a first bolt, which is arranged in the stiles, between which the The rung is arranged so that it can be brought into engagement.
  • “Committed” here means, in particular, that a force can be transferred from the recess of the guide element to the first bolt.
  • the force to be absorbed can be a weight force acting on the rung.
  • the first bolt is arranged to be movable relative to the stile.
  • the bolt can be recessed into the stile. This allows the recess to be released from the first bolt, so that after release, the rung is articulated and the axis of rotation is [unclear].
  • the bolt can be provided with a spring mechanism.
  • the spring mechanism can be designed such that, after the bolt is pushed into the stile to release its engagement in the recess, it then pushes the bolt back out. Consequently, to engage the bolt, the guide element in the stile can first be pressed in, and as soon as the recess aligns with the position of the first bolt, the bolt can be pushed back out by the spring mechanism and engage with the recess.
  • the design provides that the rung has been interlocked from a second position to a first position.
  • the rung In the second position, the rung is arranged such that its tread is parallel or substantially parallel to the longitudinal edge of the stile. Specifically, the tread of the rung can be aligned with the treads of the other rungs of the ladder section.
  • the second position differs from the first position. In particular, the second position can be such that the rung does not project beyond the width of the stile.
  • the rung In the first position, the rung is essentially horizontal. In other words, the rung is parallel to the ground, or horizontally.
  • the first position can also be understood to mean that the ladder is suitable for a person to climb.
  • the first position is characterized in particular by the fact that the rung, or tread, is wider than the stile.
  • the tread is designed to have a minimum width of 8 cm.
  • the width is the length of the tread in the first position, which differs from the distance between the stiles. In other words, the length of the tread is the shorter side of the tread.
  • the width can also be greater than 8 cm or exactly 8 cm. For example, the width might be 8.1 cm. It could also be 9, 10, or 11 cm. This list is not exhaustive.
  • “Foldable” refers in particular to a rotational movement or a rotatable rung around an axis of rotation.
  • “foldable” means that the rung is held in a first, second, or third position.
  • “foldable” means, in particular, that the rotational movement is effected by the action of an external force.
  • the external force is different from a weight force.
  • the external force is opposite to the weight force. This prevents the rung from folding due to the action of a weight force, such as when a person steps on the rung.
  • each of the stiles further has at least one second bolt for each of the at least one foldable rung, so that a surface opposite the tread surfaces and/or the respective guide element rests at least partially on the second bolt in the first position.
  • the second bolt in each stile of the first ladder section can be designed such that a surface opposite the supporting surface rests on the second bolt in a first position of the folding rung.
  • both the first and second bolts absorb the weight force acting on the rung.
  • the guide element can rest additionally or alternatively on the second bolt.
  • Partially resting means that the tread surface or guide element does not rest fully on the bolt.
  • the ladder also has a second ladder section.
  • the first ladder section differs from the second.
  • the second ladder section is formed by a third and a fourth stile.
  • the third and fourth stiles are designed so that they can each, at intervals, accommodate the stile of the first ladder section. This means, for example, that the first stile can be enclosed by the third stile, and the second stile by the fourth stile.
  • the outer dimensions of a stile in the first ladder section are smaller than the dimensions of a stile in the second section. Consequently, the spaces within the first ladder section can be moved together relative to the stiles of the second ladder section.
  • a fixed rung is arranged between the third and fourth stiles. Unlike the hinged rung, which is arranged between the first or second stile, the fixed rung is not located within a space between the third and fourth stiles. The fixed rung is not located within the space between the third and fourth stiles, but rather outside this space. Specifically, the fixed rung is positioned outside the space between the third and fourth stiles. This has the advantage that when the first ladder section is pushed into the second, the folding rungs can be slid past the fixed rungs of the second ladder section.
  • the third and fourth stiles each have a recess on a side facing the other stile along a longitudinal direction of the respective facing side, so that when the ladder parts are pushed together by inserting the respective stile of the first ladder part into the corresponding stile of the second ladder part, the bearing of the respective folding rung of the respective stile is received in a recess of the stiles on the respective facing side.
  • the third and fourth stiles are each designed to have a recess.
  • the recess is located on the side facing the other stile of the second ladder section.
  • the recess runs along the longitudinal direction of the respective stile.
  • the longitudinal direction is the direction in which the stile extends the furthest, i.e., its longest side.
  • the recess may have a rounded edge on one side at one end of the stile, so that...
  • the bolts are guided into the recess. Accordingly, the bolts and the pivot axis are designed to be accommodated in the recess. This allows the first ladder section to be slid into the second ladder section.
  • each of the guide elements has a thickening, so that the respective rung is received into the recess by the thickening when the ladder parts are pushed together and is thus held in a second position.
  • the guide element may have a thickening.
  • This thickening is designed to fit into the recess. Specifically, the thickening is designed to lock the respective folding rung into the second ladder section when the first ladder section is collapsed. This has the advantage of keeping the rung in a predetermined position during transport.
  • the thickening may be less than the wall thickness of the second ladder section. However, it must be at least thick enough to engage with the recess when the ladder is collapsed.
  • the at least one foldable rung of the first ladder section in the second position and the at least one rung of the second ladder section in a retracted state form a common rung.
  • the folding rung in the second position, which is intended for transport, forms a common rung with the respective fixed rung when the ladder is collapsed, i.e., when the first ladder section is completely or as completely as possible enclosed by the second ladder section.
  • the folding rung has no offset from the fixed rung along the length of the stiles. This has the advantage that the ladder can be accessed when collapsed. This thus allows the ladder to be used even in its collapsed state.
  • the bolts are cylindrical in shape.
  • the bolts can have different shapes, particularly different shapes with respect to a cross-section that runs parallel to the side of the piling facing the bolt.
  • the cross-section can be triangular, circular, or rectangular. This list is not exhaustive.
  • the bolt can also be cylindrical. The cylindrical shape of the bolt has the advantage that engagement is always possible even if the bolt rotates relative to the recess, provided the recess and the bolt are aligned.
  • the bolts are brought into engagement with the respective recess by means of a spring mechanism, wherein the respective bolt is first pressed into the respective stiles by the respective guide element.
  • the design may include a recessed bolt in the respective stile.
  • a force is required to move it back to its initial position.
  • the spring mechanism could consist of a spring attached at a predetermined position, which transmits a spring force between one side of the stile and one end of the bolt, thus returning the bolt to its initial position along its longitudinal axis.
  • the mechanism could also be designed not only to return the bolt to its initial position but also to engage it with the recess of the guide element. This has the advantage of automatically locking the rung relative to the stile.
  • the first bolt and the second bolt of the corresponding folding rung of the respective frame are arranged on a movement element.
  • the ladder further comprises a rod guide which is arranged internally in the respective stiles, wherein the respective first bolt is arranged in a second recess and the respective second bolt in a respective third recess, wherein the second recess and the third recess are arranged on a side facing the respective other stile, so that each of the rungs is movable between the first position and a third position, wherein the first bolt of one hinged rung is positively connected to the second bolt of the respective adjacent hinged rung.
  • a recess can be provided for both the first and second bolts.
  • Each recess defines a range of motion for the first and second bolts.
  • the first bolt is connected to the second bolt via the movement element, allowing both bolts to move together along their respective recesses. This has the advantage of allowing the bolts, and therefore the folding rung, to be moved into a third position, different from the first and second positions.
  • the respective rod guide in each of the stiles can be fixed jointly or individually in the first position or the third position, so that the rod guide absorbs a weight force acting on the at least one foldable rung by means of the respective bolts.
  • the rod guide can have a fixing mechanism.
  • each of the movement elements has a fixing mechanism.
  • each of the rod guides has its own independent fixing mechanism.
  • the rod guides of the respective stile have a common fixing mechanism.
  • the fixing mechanism is designed such that it prevents movement of the rod guide relative to the stile. This means that the fixing mechanism can absorb a force acting on the respective rungs and transmitted to the rod guide via the bolts and the movement elements.
  • such a fixing mechanism can be achieved by means of a bolt or a hook.
  • the at least one foldable rung is only foldable if it is outside the recess by extending the first ladder part from the second ladder part.
  • each stile of the first ladder section is connected to each end of a third ladder section, which corresponds to the second
  • the ladder section corresponds to, and/or a fourth ladder section which corresponds to the first ladder section, rotatably connected to each other, so that the ladder sections form a trestle ladder.
  • a second ladder section is also arranged. This has the advantage that the stepladder is extendable at least on one side. Furthermore, it can also be provided that the fourth ladder section also has a third ladder section, so that both sides of the stepladder are extendable.
  • the rungs of the first ladder section and the fourth ladder section can be moved independently of each other.
  • the rungs of the first ladder section are in a first position and the rungs of the fourth The rungs of the first ladder section are provided in a second position.
  • the rungs of the first ladder section are in a first position and the rungs of the fourth ladder section are in a third position.
  • the positions of the rungs of the first and fourth ladder sections can be adjusted independently of each other.
  • the rungs of the first and fourth ladder sections are arranged in a first position.
  • the embodiment described below is a preferred embodiment of the invention.
  • the described components each represent individual features of the invention that can be considered independently of one another. Each of these features further develops the invention independently and can therefore be considered part of the invention individually or in a combination other than the one shown.
  • the described embodiment can also be supplemented by further features of the invention already described.
  • Figure 1 shows a hinged rung 30.
  • the hinged rung 30 has a guide element 50 on each of two opposite sides.
  • Each of the guide elements 50 has a recess 52.
  • each of the guide elements 50 has a thickening 55.
  • the thickening 55 can be arranged in the center of the guide element 50.
  • the thickening 55 can extend, in particular, from the center of the guide element to an edge, especially to a tread surface 34.
  • the recess 52 can be arranged in the thickening 55.
  • an edge or the opposite edges of the thickening can run parallel to the tread surface 34.
  • the tread surface 34 can, in particular, extend along one of the longest sides of the guide element 50.
  • Figure 1 shows a ladder 1, in particular a first ladder section 3.
  • the first ladder section 3 has a first stile 10 and a second stile 20.
  • Figure 2 shows in particular a side view of the spars, so that optionally the first spar 10 or the second stile 20 is shown.
  • the stile 10, 20 is connected to the rung 30.
  • the stile 10, 20 receives the rung 30 by means of a pivot axis 40 so that it can rotate relative to the spaces 10, 20.
  • the pivot axis 40 can, for example, be accommodated by an insert 42 in the stile 10, 20.
  • the rung 30 is also in a second position.
  • the rung 30 is also connected to the stiles 10 and 20 via a pivot axis 40.
  • the rung 30 can be pivoted from a third position to a first position.
  • the tread surface 34 rests on the second bolt 62 opposite the side of the rung 30.
  • first bolt 60 is movable in a first recess 12 and the second bolt 62 in a second recess 22.
  • first bolt is guided through the recess 12 and the second bolt through the recess 22.
  • the recess can define a range of motion for each bolt.
  • a rod guide 120 is designed to hold both the first bolt 12 and the second bolt 22 in position.
  • the pivot axis 40 of the rung 30 is arranged in the respective spaces 10 and 20 by means of insert 42.
  • the bolt 60 is not engaged with the recess 52.
  • the bolts 60 and 62 are arranged on a movement element 110.
  • the movement element 110 connects the respective parts of the rod guide.
  • one rod is connected to the first bolt of the movement element and another rod is connected to the second bolt of the movement element.
  • the first rod is not connected to the second bolt 62 and the second rod is not connected to the first bolt 60.
  • the movement element 110 is displaceable along the longitudinal direction of the stiles 10, 20.
  • the rod guide is formed by a single element in which the movement element 110 with the bolts 60, 62 is arranged. By designing the rod guide 120 as a single element, rotation of the respective rods relative to each other can be prevented.
  • the rod guide 120 is provided for in both the first stile 10 and the second stile 20. This prevents the rung 30 from tilting when folded down.
  • Figure 4 shows a schematic representation of a first ladder section 10 with an internal rod guide 120.
  • Figure 4 similar features such as Figure 3
  • the rod guide is arranged internally within the beam 10, 20.
  • the beams 10, 20 are hollow.
  • Figure 5 shows a schematic representation of a first ladder section 3 and a second ladder section 5 with cutouts 72 and 82.
  • the first ladder section 3 has a first stile 10 and a second stile 20.
  • the second ladder section 5 has a third stile 70 and a fourth stile 80.
  • the stiles 70, 80 have a recess 72, 82.
  • the recess is arranged along an inner side of the stiles 70, 80.
  • the inner side of the stiles is the side 100 facing the respective other stile 70, 80.
  • the recess 72, 82 extends along a longitudinal direction of the stile 70, 80.
  • the second ladder section 5 has a fixed rung 90.
  • the fixed rung 90 is arranged between the third stile 70 and the fourth stile 80.
  • the fixed rung 90 is arranged such that it is positioned outside a gap between the stiles 70 and 80.
  • the fixed rung 90 is arranged such that, when the ladder is retracted, the folding rung can be slid past the fixed rung 90 in a third position.
  • a surface perpendicular to the tread which is a substantially horizontal surface in the third position, forms an alignment with the substantially horizontal surface of the fixed rung. In this way, the ladder 1 can be used in a retracted state.
  • Figures 6A-6C show a schematic representation of different arrangements of the first conductor part 3 relative to the third conductor part 130.
  • Figure 6A shows a stepladder.
  • the stepladder is connected to the third ladder section 130 by a hinge, allowing movement relative to each other.
  • the hinge can have a locking mechanism so that the first ladder section is fixed in a forward position relative to the third ladder section.
  • both the first ladder section 3 and the third ladder section 130 have rungs 30.
  • the rungs 30 are arranged such that the treads 34 are horizontal. Specifically, the treads 34 of the respective ladder sections 3 and 130 are aligned.
  • the rungs 30 are arranged in the first position.
  • Figure 6C Figure 1 also shows a stepladder where the first ladder section 3 and the third ladder section 130 are arranged such that the two ladder sections form a straight line.
  • the rungs of the first ladder section 3 are arranged in the first position, while the rungs of the third ladder section are arranged in the second position.
  • the treads 34 of the rungs 30 of the first ladder section 3 and the rungs 30 of the third ladder section 130 are parallel to each other.
  • FIGS. 7A-7C schematically show in a sequence of images a folding of the foldable rungs 30.
  • the first ladder section 3 can be extended from the second ladder section 5. It can also be provided that only the first ladder section is extended from the second ladder section, while the third ladder section is not extended from the fourth ladder section 140.
  • the thickening 55 leaves the recess 72, 82, so that the rung 30 is now rotatable about the axis of rotation 40. In particular, the rung 30 is rotatable clockwise, so that the recess 52 engages with the bolt 60.
  • FIG. 7C The rung 30 is shown, while the tread 34 moves from a third position, in which the tread is essentially parallel to the edge of the stile 10, 20, to the second position.
  • This rotation can be effected by the application of an external force.
  • the rung 30 can only rotate once the recess 55 has left the opening 72, 82. "Leaving" means that the opening 72, 82 releases the thickening 55.
  • Figure 7B Figure 3 shows the rung 30 in the second position.
  • the tread surface 34 of the rung is essentially horizontal to the ground.
  • the tread surface of rung 30 is arranged parallel to a tread surface of the fixed rung 90.
  • Figure 3 also shows Figure 7D , that the removal of the first ladder part 3 from the second ladder part 5 is independent of the removal of the third ladder part 130 from the fourth ladder part 140.

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

Claims (13)

  1. Échelle (1), l'échelle (1) comprenant :
    - une première partie d'échelle (3) comprenant :
    - un premier montant (10) et un deuxième montant (20) ;
    - au moins un échelon rabattable (30) disposé entre le premier montant (10) et le deuxième montant (20), l'échelon (30) comportant un palier (42) le long d'un axe de rotation (40) sur les montants respectifs (10, 20) de manière à ce que l'échelon (30) soit monté de manière rotative par rapport aux montants (10, 20) ;
    - un élément de guidage respectif (50) disposé sur un côté respectif (32) de l'échelon rabattable (30), le côté respectif (32) étant tourné vers le montant correspondant (10, 20),
    - l'élément de guidage (50) présentant au moins un renfoncement (52) ;
    - au moins un premier boulon (60) disposé sur chacun des montants (10, 20) pour chacun dudit au moins un échelon rabattable (30), le premier boulon (60) étant conçu de manière à venir en engagement, dans une première position, avec ledit au moins un renfoncement (52) et à maintenir ledit au moins un échelon rabattable (30) dans la première position, l'échelon rabattable (30) présentant, dans la première position, une surface de marche horizontale (34) d'une profondeur (t) d'au moins 8 cm, et le premier boulon (60) étant conçu pour absorber une force de poids (f) qui agit sur ledit au moins un échelon rabattable (30) et sur la surface de marche (34), le premier boulon (60) étant en outre conçu de telle sorte que, sous l'effet d'une force opposée à la force de poids (f), l'engagement entre le renfoncement respectif (52) et le premier boulon (60) peut être libéré, de sorte que ledit au moins un échelon rabattable (30) peut être rabattu vers une deuxième position, et dans la deuxième position, la surface de marche respective (34) est disposée de manière sensiblement parallèle aux montants (10, 20),
    caractérisée en ce que
    - l'échelle (1) comprend une deuxième partie d'échelle (5), de sorte que l'échelle (1) est extensible, la deuxième partie d'échelle (5) comprenant :
    - un troisième montant (70) et un quatrième montant (80) ;
    - au moins un échelon (90) qui est relié solidairement au troisième montant (70) et au quatrième montant (80) et qui est disposé à l'extérieur d'un espace intermédiaire défini par le troisième montant (70) et par le quatrième montant (80) ;
    - chacun des montants (70, 80) de la deuxième partie d'échelle (5) étant conçu pour loger en lui-même respectivement l'un des montants (10, 20) de la première partie d'échelle (3),
    et
    - le troisième montant (70) et le quatrième montant (80) présentent, sur un côté tourné vers l'autre montant (70, 80), un évidement le long d'une direction longitudinale du côté respectif (100) tourné vers lui, de sorte que, lors de l'emboîtement des parties d'échelle (3, 5) par insertion du montant respectif (10, 20) de la première partie d'échelle (3) dans le montant correspondant (70, 80) de la deuxième partie d'échelle (5), le palier (42) de l'échelon rabattable respectif (30) du montant respectif (10, 20) est logé dans un évidement (72, 82) des montants (70, 80) sur le côté respectif (100) tourné vers lui.
  2. Échelle (1) selon la revendication 1,
    dans laquelle chacun des montants (10, 20) comprend en outre au moins un deuxième boulon (62) pour chacun dudit au moins un échelon rabattable (30), de sorte qu'une surface opposée à la surface de marche (34) et/ou l'élément de guidage respectif (50) repose au moins partiellement sur le deuxième boulon (62), dans la première position.
  3. Échelle (1) selon l'une des revendications précédentes,
    dans laquelle les boulons (60, 62) peuvent être noyés dans les montants respectifs (10, 20) de la première partie d'échelle (3).
  4. Échelle (1) selon la revendication 1,
    dans laquelle chacun des éléments de guidage (50) présente un épaississement (55) de telle sorte que l'échelon respectif (30) soit logé dans l'évidement (72, 82) par l'épaississement (55) lors de l'emboîtement des parties d'échelle (3, 5) et soit ainsi maintenu dans une deuxième position.
  5. Échelle (1) selon l'une des revendications 1 ou 3 à 4,
    dans laquelle ledit au moins un échelon rabattable (30) de la première partie d'échelle (3) dans la deuxième position et ledit au moins un échelon (90) de la deuxième partie d'échelle (5) dans un état rétracté forment un échelon commun.
  6. Échelle (1) selon l'une des revendications précédentes,
    dans laquelle les boulons (60, 62) sont de forme cylindrique.
  7. Échelle (1) selon l'une des revendications précédentes,
    dans laquelle les boulons (60) sont amenés en engagement avec le renfoncement respectif (52) au moyen d'un mécanisme à ressort, le boulon respectif (60) étant d'abord enfoncé dans les montants respectifs (10, 20) par l'élément de guidage respectif (50).
  8. Échelle (1) selon la revendication 2,
    dans laquelle le premier boulon (60) et le deuxième boulon (62) de l'échelon rabattable correspondant (30) du montant respectif (10, 20) sont disposés sur un élément mobile (110).
  9. Échelle (1) selon la revendication 8,
    dans laquelle l'échelle (1) comprend en outre un guide-barre (120) disposé à l'intérieur des montants respectifs (10, 20), le premier boulon respectif (60) étant disposé dans un deuxième évidement respectif (12) et le deuxième boulon respectif (62) étant disposé dans un troisième évidement respectif (22), le deuxième évidement (12) et le troisième évidement (22) étant disposés sur un côté respectif (100) tourné vers l'autre montant respectif (10, 20), de sorte que chacun des échelons (30) est mobile entre la première position et une troisième position, le premier boulon respectif (60) d'un échelon rabattable (30) étant relié par adhérence au deuxième boulon (62) de l'échelon rabattable respectif (30) adjacent.
  10. Échelle (1) selon la revendication 9,
    dans laquelle le guide-barre respectif (120) peut être fixé conjointement ou individuellement dans chacun des montants (10, 20) dans la première position ou dans la troisième position, de sorte que le guide-barre (120) absorbe, au moyen des boulons respectifs (60, 62), une force de poids (f) agissant sur ledit au moins un échelon rabattable (30).
  11. Échelle (1) selon l'une des revendications précédentes,
    dans laquelle ledit au moins un échelon rabattable (30) ne peut être rabattu que lorsqu'il se trouve à l'extérieur de l'évidement (72, 82) par suite à l'extraction de la première partie d'échelle (3) hors de la deuxième partie d'échelle (5).
  12. Échelle (1) selon les revendications 1, 2 et l'une des revendications 3 à 9,
    dans laquelle une extrémité (14, 24) des montants respectifs (10, 20) de la première partie d'échelle (3) est reliée de manière rotative à une extrémité respective d'une troisième partie d'échelle (130), qui correspond à la deuxième partie d'échelle (5), ou d'une quatrième partie d'échelle (140), qui correspond à la première partie d'échelle (3), de sorte que les parties d'échelle (3, 5, 130, 140) forment une échelle double.
  13. Échelle (1) selon la revendication 12,
    dans laquelle les échelons rabattables (30) de la première partie d'échelle (3) et de la quatrième partie d'échelle (140) sont disposés dans une première position ou les échelons rabattables (30) de la première partie d'échelle (3) sont disposés dans la première position et les échelons rabattables (30) de la quatrième partie d'échelle (140) sont disposés dans la troisième position, les surfaces de marche (34) des échelons rabattables (30) de la première partie d'échelle (3) et de la quatrième partie d'échelle (140) étant sensiblement horizontales.
EP24200747.4A 2023-09-19 2024-09-17 Échelle avec échellons repliables Active EP4528067B1 (fr)

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