EP3085879B1 - Step comprising a stopping mechanism with a stay - Google Patents

Step comprising a stopping mechanism with a stay Download PDF

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Publication number
EP3085879B1
EP3085879B1 EP15164550.4A EP15164550A EP3085879B1 EP 3085879 B1 EP3085879 B1 EP 3085879B1 EP 15164550 A EP15164550 A EP 15164550A EP 3085879 B1 EP3085879 B1 EP 3085879B1
Authority
EP
European Patent Office
Prior art keywords
articulation
frame
axis
stepladder
plane
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.)
Not-in-force
Application number
EP15164550.4A
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German (de)
French (fr)
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EP3085879A1 (en
Inventor
Patrick Lachant
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CDH Group SAS
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CDH Group SAS
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Publication date
Application filed by CDH Group SAS filed Critical CDH Group SAS
Priority to EP15164550.4A priority Critical patent/EP3085879B1/en
Publication of EP3085879A1 publication Critical patent/EP3085879A1/en
Application granted granted Critical
Publication of EP3085879B1 publication Critical patent/EP3085879B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/14—Holders for pails or other equipment on or for ladders

Definitions

  • the invention relates to the field of footboards.
  • a step comprises two mutually articulated planes that allow it to adopt an expanded configuration in which the planes are spaced angularly from one another and a folded configuration in which the planes are substantially parallel to each other.
  • Each plan usually includes two amounts and one or more steps connecting the amounts.
  • step and stepladder are synonymous, regardless of the number of steps.
  • stop mechanisms To limit the angle of angular aperture between the planes, it is known to use stop mechanisms with compass.
  • the document AU7538991 presents a step equipped with a stop mechanism with compass, this stop mechanism comprising a mutually articulated frame with two rods.
  • the frame comprises a base and two arms projecting from the base, each arm being hinged relative to a post of the rear plane about a rear hinge axis.
  • Each link is mounted hinged on the one hand to an amount of the front plane, by an outer end, about a hinge front axis, and secondly to the frame, by an inner end, about a central axis hinge so that in the deployed configuration, the base of the frame bears on the rods, and in the folded configuration, the rods and the frame are substantially parallel to the front and rear planes of the step.
  • the locations of the frame arms on the uprights of the rear plane and the outer ends of the links on the uprights of the front plane are relatively close to the steps.
  • the user would inadvertently support the frame or rods, it would result, depending on the intensity of the support, either a deterioration of the stop mechanism, or the appearance of strong constraints of shear at the central axes of articulation to the detriment of the safety of the step.
  • the document DE 29 03 781 A1 discloses a step according to the preamble of claim 1.
  • a first objective is to provide a step offering simplicity of implementation and use, without loss of reliability or security.
  • a step 1 comprising a front plane 2 , a rear plane 3 , a mechanism 4 stop internal compass comprising a frame 5 mutually articulated with two rods 6 , the frame 5 being integral with the front plane 2 and the rods 6 being integral with the rear plane 3 .
  • the plans 2 , 3 front and rear are mounted hinged together so that the step 1 can adopt a folded configuration (shown partially on the figure 6 ) in which the planes 2 , 3 are substantially parallel to each other, and an expanded configuration (shown in FIG. figure 1 ) in which the planes 2 , 3 together form an acute angle.
  • the front plane 2 comprises a pair of uprights 7 before and at least one step 8 transversely connecting the uprights 7 before.
  • the step 1 comprises four steps 8.
  • a number of steps 8 less than or greater than four could be provided (including three or five).
  • the amounts 7 are in this case formed of profiles in a metallic material (for example aluminum or aluminum alloy) or composite, for example based on vegetable fibers (for example flax fiber) or mineral fibers (e.g. . glass fiber), in particular U-section 9 at lower ends, the uprights 7 are provided with non-slip pads 10.
  • the rear plane 3 comprises a pair of rear uprights 11 and at least one step 8 connecting the rear uprights 11 .
  • the rear plane 3 comprises three steps 8.
  • the rear pillars 11 are of similar construction and shape to the front pillars 7 .
  • the rear pillars 11 are provided with non-slip pads 10.
  • step 1 is in deployed configuration (shown on figure 1 )
  • the Rear plane 3 forms an acute angle with the front plane 2
  • the lower ends 12 of the rear uprights 11 form, with the lower ends 9 of the uprights 7 before, a laying plane 13 for the step 1.
  • a plane 14 is also defined.
  • median of the step 1 the median plane 14 being perpendicular to the plane 13 of installation and equidistant from the uprights 7 of the front plane 2 and uprights 11 of the rear plane 3 .
  • the uprights 7 of the front plane 2 intended to form a rise plan allowing a user to reach areas in height, are wider than the uprights 11 of the rear plane 3 .
  • the steps 8 of the rear plane 3 have the primary function of ensuring the rigidity of the rear plane 3 , they are rigid enough to be able, on occasion, make extra steps.
  • the mechanism 4 of compass stop mounted between the planes 2 , 3 front and rear to block the step 1 deployed configuration comprises a frame 5 mutually articulated with two rods 6.
  • the frame 5 comprises a base 15 and two arms 16 protruding from the base 15 , each arm 16 being hinged relative to an upright 11 of the rear plane 3 about a hinge axis 17 rear.
  • the frame 5 comprises a base 15 and two arms 16 symmetrical with respect to the median plane 14 of the step 1 , these two arms 16 protruding perpendicular to the base 15.
  • Each arm 16 includes a main portion 18 , an intermediate portion 19 and a bracket 20 for fixing.
  • the intermediate portion 19 is substantially oriented perpendicular to the main portion 18 (that is to say along the Y axis) and extends from the main portion 18 towards the outside of the frame 5.
  • the bracket 20 is substantially oriented perpendicularly to the intermediate portion 19 , substantially parallel to the main portion 18 (i.e., along X) and extends from the intermediate portion 19 in an opposite direction. at the base 15.
  • the frame 5 is for example made firstly by cutting a lamella within a sheet (for example steel or aluminum), this lamella being then folded according to the dimensions desired.
  • the frame 5 is made by molding or any other known method.
  • the frame 5 is hingedly mounted on the uprights 11 of the rear plane 3 through the brackets 20 .
  • each bracket 20 is mounted on one of the rear uprights 11 via a screw 17 and a nut 21 , the arm 16 of the frame 5 remaining free to rotate about the screw 17 , the latter thus forming the axis 17 rear hinge.
  • a spacer 22 is interposed between the inner surface 23 of the rear upright 11 and the outer surface 24 of the bracket 20 , this spacer 22 having the function of limiting friction and thus facilitate maneuvers of the stop mechanism 4 .
  • This spacer 22 is for example made of a low friction material such as teflon ® or nylon.
  • each arm 16 on a post 11 11 of the rear plane 3 is made in this case by a screw 17 with cylindrical head with six lobes and a hexagonal nut 21 slotted, it could be used to any other type of screw 17 and d nut 21 as well as any other similar fastening means such as for example a rivet.
  • each rod 6 is in the form of a wire, the outer end 25 being bent to form the axis 26 before hinge and the inner end 27 bent to form the central axis 28 articulation.
  • each link 6 comprises a linear central section 29 delimited by an inner end 27 and an outer end 25 .
  • the rods 6 are symmetrical in the median plane 14 of the step 1.
  • the outer end 25 of the rod 6 includes a portion 30 angled outer intermediate 26 preceding a final section external bent.
  • the external intermediate section 30 is substantially oriented perpendicular to the central section 29 (that is to say along the Z axis), it extends from the central section 29 towards the upper part of the step 1 when it is in deployed configuration.
  • the final outer portion 26 is oriented substantially perpendicular to the intermediate portion 30 external (that is to say along the Y axis), it extends from the outer portion 30 intermediate in the opposite direction to the median plane 14 1.
  • the outer end section 26 is the front articulation axis 26 .
  • the axis 26 before hinge of each rod 6 is hingedly mounted to an upright 7 of the front plane 2 under a step 8 by means of a support 31 , this arrangement for isolating the stop mechanism 4 to compass and thus to avoid any risk of interference with the user when using the step 1.
  • two supports 31 in the form of a housing are positioned under a step 8 of the plane 2 before either side, each support 31 having an outer shape substantially similar to the inner shape of the step 8 so that the boxes are integrated within it, the supports 31 being secured to the uprights 7 from the front plane 2 by means of rivets 32.
  • Each support 31 has a slotted open stem 33 into which is inserted the axis 26 before articulation of a link 6 , the link 6 being free to pivot around the axis 26 before articulation, the presence of the slot 34 on the shaft 33 to facilitate the insertion of the axis 26 before articulation during assembly.
  • Each upright 7 of the front plane 2 has a hole 35 coaxial with the shank 33 , in which the hinge axis 26 is introduced, the latter thus protruding from the outer surface 36 of the upright 7 before and being axially stopped by position by a washer 37 with inner teeth positioned on the end thereof.
  • the axial stop of the axis 26 before hinge is made in this case by a washer 37 with inner teeth, one could have for example an end of axis 26 before threaded articulation projecting from the outer surface 36 of the amount 7 before which is screwed a nut.
  • the role of the external intermediate section 30 is, inter alia, to allow the total folding of the step 1 taking into account the presence of the step 8 as can be seen on the figure 6 .
  • the inner end 27 of the rod 6 includes an inner intermediate bent section 38 preceding an inner bent end section 28 .
  • the inner intermediate section 38 is substantially oriented perpendicularly to the central section 29 (that is to say along Z), it extends from the central section 29 towards the upper part of the step 1 when it is in deployed configuration.
  • the inner end portion 28 is substantially perpendicularly oriented to the inner intermediate portion 38 (i.e. along the Y axis), it extends from the inner intermediate portion 38 in the opposite direction to the median plane 14 .
  • the final internal section 28 is the central articulation axis 28 .
  • each link 6 is articulated on one of the arms 16 of the frame 5.
  • each arm 16 has a hole 39 into which is inserted the central axis 28 of articulation, that- projecting from the outer surface 40 of the arm 16 of the frame 5 , the central articulation axis 28 comprising two shoulders 41 , 42 positioned on either side of the arm 16 of the frame 5 , an internal shoulder 41 and a shoulder 42 external to stop it axially.
  • the outer shoulder 42 could be replaced for example by making a thread on the end of the central axis 28 hinge, the latter thus projecting from the outer surface 40 of the arm 16 frame 5 , a nut is then screwed on the threaded end to achieve the axial stop.
  • Each link 6 is for example obtained by bending or folding a wire (for example steel or aluminum).
  • the internal and external shoulders 41 , 42 corresponding to a crushing of material may for example be made by stamping or stamping.
  • the handle 43 In order to facilitate maneuvers of the compass stop mechanism 4 , it comprises an ergonomic handle 43 secured to the base 15 of the frame 5.
  • the handle 43 is fixed on the base 15 of the frame 5 by clipping.
  • the handle 43 may be fixed for example by riveting, screwing or bolting.
  • the mechanism 4 of compass stop When the step 1 is in folded configuration, the mechanism 4 of compass stop is in the folded position, the rods 6 and the frame 5 are substantially parallel to the planes 2 , 3 front and rear of the step 1.
  • the stop mechanism 4 When the step 1 is in deployed configuration, the stop mechanism 4 is in the deployed position, the rods 6 then extending substantially in the extension of the frame 5. More specifically, the lower surface 44 of the base 15 of the frame 5 comes resting on the links 6 as represented on the figure 5 . Therefore, the step 1 is maintained and secured in the deployed position.
  • the base 15 of the frame 5 has two rectangular notches 45 in which are introduced the rods 6 when the step 1 is in deployed configuration.
  • the introduction of the links 6 within the notches 45 limits the movements of the rods 6 relative to the frame 5 and thus provides greater stability to the step 1.
  • the implementation of the rods 6 in particular a step 8 of the front plane 2 avoids any interference between the 4 stop mechanism and the user, the benefit of the reliability of the mechanism 4 stop at compass and the safety of the user.
  • the geometry of the rods 6 associated with the fact that the axes 26 , 17 front and rear hinge are not included in the same plane parallel to the plane 13 of laying, allows to accentuate the blocking of the step 1 in deployed configuration , for the benefit of the user's security.
  • the number of parts is relatively small (besides the uprights 7 , 11 and steps 8 , there are two links 6 , a frame 5 , two supports 31 , a handle 43 , two washers 37 , two screws 17 , two nuts 21 and two spacers 22 ).

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

Description

L'invention a trait au domaine des marchepieds.The invention relates to the field of footboards.

Un marchepied comprend deux plans mutuellement articulés qui lui permettent d'adopter une configuration déployée dans laquelle les plans sont écartés angulairement l'un de l'autre et une configuration repliée dans laquelle les plans sont sensiblement parallèles l'un à l'autre. Chaque plan comprend en général deux montants ainsi qu'une ou plusieurs marches reliant les montants. Dans la présente demande, les termes « marchepied » et « escabeau » sont synonymes, quel que soit le nombre de marches.A step comprises two mutually articulated planes that allow it to adopt an expanded configuration in which the planes are spaced angularly from one another and a folded configuration in which the planes are substantially parallel to each other. Each plan usually includes two amounts and one or more steps connecting the amounts. In the present application, the terms "step" and "stepladder" are synonymous, regardless of the number of steps.

Pour limiter l'angle d'ouverture angulaire entre les plans, il est connu d'utiliser des mécanismes d'arrêt à compas.To limit the angle of angular aperture between the planes, it is known to use stop mechanisms with compass.

Le document AU7538991 (BAILEY ALU PROD) présente un marchepied équipé d'un mécanisme d'arrêt à compas, ce mécanisme d'arrêt comprenant un cadre mutuellement articulé avec deux biellettes. Le cadre comprend une base et deux bras faisant saillie de la base, chaque bras étant monté articulé par rapport à un montant du plan arrière autour d'un axe arrière d'articulation. Chaque biellette est montée articulée d'une part à un montant du plan avant, par une extrémité externe, autour d'un axe avant d'articulation, et d'autre part au cadre, par une extrémité interne, autour d'un axe central d'articulation de sorte que, dans la configuration déployée, la base du cadre vient en appui sur les biellettes, et, dans la configuration repliée, les biellettes et le cadre sont sensiblement parallèles aux plans avant et arrière du marchepied.The document AU7538991 (BAILEY ALU PROD) presents a step equipped with a stop mechanism with compass, this stop mechanism comprising a mutually articulated frame with two rods. The frame comprises a base and two arms projecting from the base, each arm being hinged relative to a post of the rear plane about a rear hinge axis. Each link is mounted hinged on the one hand to an amount of the front plane, by an outer end, about a hinge front axis, and secondly to the frame, by an inner end, about a central axis hinge so that in the deployed configuration, the base of the frame bears on the rods, and in the folded configuration, the rods and the frame are substantially parallel to the front and rear planes of the step.

Ce mécanisme n'est cependant pas sans inconvénients.This mechanism is not without drawbacks.

Les implantations des bras du cadre sur les montants du plan arrière et des extrémités externes des biellettes sur les montants du plan avant sont relativement proches des marches. Dans l'hypothèse où l'utilisateur appuierait par mégarde sur le cadre ou les biellettes, il en résulterait, en fonction de l'intensité de l'appui, soit une détérioration du mécanisme d'arrêt, soit l'apparition de fortes contraintes de cisaillement au niveau des axes centraux d'articulation au détriment de la sécurité du marchepied. Le document DE 29 03 781 A1 décrit un marchepied selon le préambule de la revendication 1.The locations of the frame arms on the uprights of the rear plane and the outer ends of the links on the uprights of the front plane are relatively close to the steps. In the event that the user would inadvertently support the frame or rods, it would result, depending on the intensity of the support, either a deterioration of the stop mechanism, or the appearance of strong constraints of shear at the central axes of articulation to the detriment of the safety of the step. The document DE 29 03 781 A1 discloses a step according to the preamble of claim 1.

Un premier objectif est de proposer un marchepied offrant une simplicité de réalisation et d'utilisation, sans perte de fiabilité ni de sécurité.A first objective is to provide a step offering simplicity of implementation and use, without loss of reliability or security.

A cet effet il est proposé un marchepied comprenant :

  • un plan avant comportant une paire de montants avant et une série de marches reliant les montants avant ;
  • un plan arrière comportant une paire de montants arrière et monté articulé par rapport au plan avant, de sorte que le marchepied peut adopter une configuration repliée dans laquelle les plans avant et arrière sont sensiblement parallèles l'un par rapport à l'autre, et une configuration déployée dans laquelle les plans avant et arrière forment ensemble un angle aigu ;
  • un mécanisme d'arrêt à compas monté entre les plans avant et arrière pour bloquer le marchepied en configuration déployée ;
le mécanisme d'arrêt comprenant :
  • un cadre ayant une base et deux bras faisant saillie de la base, chaque bras étant monté articulé par rapport à un montant du plan arrière autour d'un axe arrière d'articulation ;
  • deux biellettes chacune montée articulée d'une part, par rapport à un montant du plan avant, par une extrémité externe, autour d'un axe avant d'articulation, et, d'autre part, par rapport au cadre, par une extrémité interne, autour d'un axe central d'articulation de sorte que, dans la configuration déployée, la base du cadre vient en appui sur les biellettes, et, dans la configuration repliée, les biellettes et le cadre sont sensiblement parallèles aux plans avant et arrière du marchepied, chaque biellette se présentant sous la forme d'un fil, l'extrémité externe étant coudée pour former l'axe avant d'articulation et l'extrémité interne coudée pour former l'axe central d'articulation.
For this purpose it is proposed a step comprising:
  • a front plane comprising a pair of front posts and a series of steps connecting the front posts;
  • a rear plane comprising a pair of rear uprights and hingedly mounted relative to the front plane, so that the step can adopt a folded configuration in which the front and rear planes are substantially parallel to each other, and a deployed configuration in which the front and rear planes together form an acute angle;
  • a compass stop mechanism mounted between the front and rear planes to lock the step in the deployed configuration;
the stop mechanism comprising:
  • a frame having a base and two arms projecting from the base, each arm being articulated relative to a rear plane upright about a rear hinge axis;
  • two links each mounted articulated on the one hand, with respect to an amount of the front plane, by an outer end, about a hinge front axis, and, secondly, with respect to the frame, by an inner end around a central axis of articulation so that, in the deployed configuration, the base of the frame bears on the links, and in the folded configuration, the links and the frame are substantially parallel to the front and rear planes of the step, each rod being in the form of a wire, the outer end being bent to form the hinge axis before and the inner end bent to form the central axis of articulation.

Diverses caractéristiques supplémentaires peuvent être prévues, seules ou en combinaison :

  • chaque biellette est montée articulée par l'axe central d'articulation sur un bras du cadre ;
  • chaque bras du cadre possède un trou dans lequel est introduit l'axe central d'articulation de la biellette ;
  • l'axe central d'articulation de chaque biellette comprend deux épaulements positionnés de part et d'autre du bras du cadre ;
  • chaque biellette est montée articulée par l'axe avant d'articulation à un montant du plan avant par l'intermédiaire d'un support ;
  • chaque support possède un fût dans lequel est introduit l'axe avant d'articulation de l'extrémité externe de la biellette ;
  • l'axe avant d'articulation est positionné sous une marche du plan avant ;
  • l'extrémité externe de chaque biellette comprend un tronçon intermédiaire externe coudé précédant un tronçon final externe coudé, le tronçon final externe étant l'axe avant d'articulation ;
  • le mécanisme d'arrêt comprend une poignée solidaire de la base du cadre.
Various additional features may be provided, alone or in combination:
  • each link is articulated by the central axis of articulation on an arm of the frame;
  • each arm of the frame has a hole in which is introduced the central axis of articulation of the link;
  • the central axis of articulation of each link comprises two shoulders positioned on either side of the arm of the frame;
  • each link is mounted hinged by the hinge front axis to an amount of the front plane by means of a support;
  • each support has a shaft in which is introduced the front axis of articulation of the outer end of the rod;
  • the hinge front axis is positioned under a step of the front plane;
  • the outer end of each link comprises an external intermediate elbow section preceding an outer end section bent, the outer end section being the front hinge axis;
  • the stop mechanism comprises a handle integral with the base of the frame.

D'autres objets et avantages de l'invention apparaîtront à la lumière de la description d'un mode de réalisation, faite ci-après en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective d'un marchepied équipé d'un mécanisme d'arrêt à compas, dans la configuration déployée ;
  • la figure 2 est une vue en perspective éclatée montrant le mécanisme d'arrêt à compas de la figure 1, à échelle agrandie ;
  • la figure 3 est une vue de détail de dessus illustrant la fixation de l'extrémité interne d'une biellette sur le cadre, dans la configuration déployée ;
  • la figure 4 est une vue de détail en coupe illustrant l'implantation de l'extrémité externe de la biellette sur un montant du plan avant, dans la configuration déployée, selon le plan de coupe A-A ;
  • la figure 5 est une vue de détail en coupe illustrant le contact entre la biellette et la base du cadre, dans la configuration déployée, selon un plan de coupe A-A ;
  • la figure 6 est une vue de détail en coupe du mécanisme d'arrêt à compas, dans une position repliée, selon le plan de coupe A-A ;
  • la figure 7 est une vue de détail illustrant la disposition des biellettes par rapport au cadre, dans une configuration déployée, selon une variante de réalisation.
Other objects and advantages of the invention will become apparent in the light of the description of an embodiment, given hereinafter with reference to the accompanying drawings, in which:
  • the figure 1 is a perspective view of a step equipped with a compass stop mechanism, in the deployed configuration;
  • the figure 2 is an exploded perspective view showing the compass stop mechanism of the figure 1 on an enlarged scale;
  • the figure 3 is a detail view from above illustrating the attachment of the inner end of a link to the frame, in the deployed configuration;
  • the figure 4 is a sectional detail view illustrating the implantation of the outer end of the rod on a front plane upright, in the deployed configuration, according to the cutting plane AA;
  • the figure 5 is a sectional detail view illustrating the contact between the rod and the base of the frame, in the deployed configuration, according to a sectional plane AA;
  • the figure 6 is a detailed sectional view of the compass stop mechanism, in a folded position, along the cutting plane AA;
  • the figure 7 is a detail view illustrating the arrangement of the rods relative to the frame, in an expanded configuration, according to an alternative embodiment.

Sur la figure 1 est représenté un marchepied 1 comprenant un plan 2 avant, un plan 3 arrière, un mécanisme 4 d'arrêt à compas intérieur comprenant un cadre 5 mutuellement articulé avec deux biellettes 6, le cadre 5 étant solidaire du plan 2 avant et les biellettes 6 étant solidaires du plan 3 arrière.On the figure 1 is shown a step 1 comprising a front plane 2 , a rear plane 3 , a mechanism 4 stop internal compass comprising a frame 5 mutually articulated with two rods 6 , the frame 5 being integral with the front plane 2 and the rods 6 being integral with the rear plane 3 .

On définit par rapport au marchepied 1 un repère orthogonal XYZ comprenant trois axes perpendiculaires deux à deux, à savoir :

  • un axe X, définissant une direction longitudinale, horizontale, confondue avec la vision de l'utilisateur lorsqu'il est sur le plan 2 avant du marchepied 1,
  • un axe Y, définissant une direction transversale, horizontale qui avec l'axe X définit un plan XY horizontal,
  • un axe Z, définissant une direction verticale, perpendiculaire au plan XY horizontal.
One orthogonal reference XYZ is defined relative to the step 1, comprising three axes perpendicular two by two, namely:
  • an axis X, defining a longitudinal direction, horizontal, coincides with the vision of the user when he is on the plane 2 before the step 1 ,
  • a Y axis, defining a transverse, horizontal direction which with the X axis defines a horizontal XY plane,
  • a Z axis, defining a vertical direction, perpendicular to the horizontal XY plane.

Les plans 2, 3 avant et arrière sont montés articulés entre eux de sorte que le marchepied 1 peut adopter une configuration repliée (représentée partiellement sur la figure 6) dans laquelle les plans 2, 3 sont sensiblement parallèles l'un par rapport à l'autre, et une configuration déployée (représentée sur la figure 1) dans laquelle les plans 2, 3 forment ensemble un angle aigu.The plans 2 , 3 front and rear are mounted hinged together so that the step 1 can adopt a folded configuration (shown partially on the figure 6 ) in which the planes 2 , 3 are substantially parallel to each other, and an expanded configuration (shown in FIG. figure 1 ) in which the planes 2 , 3 together form an acute angle.

Le plan 2 avant comprend une paire de montants 7 avant et au moins une marche 8 reliant transversalement les montants 7 avant. Dans l'exemple illustré, le marchepied 1 comprend quatre marches 8. En variante, un nombre de marches 8 inférieur ou supérieur à quatre pourrait être prévu (notamment trois ou cinq). Les montants 7 sont en l'espèce formés de profilés dans un matériau métallique (par exemple en aluminium ou en alliage d'aluminium) ou composite, par exemple à base de fibres végétales (par ex. fibre de lin) ou minérales (par ex. fibre de verre), notamment à section en U. A des extrémités 9 inférieures, les montants 7 sont munis de patins 10 antidérapants.The front plane 2 comprises a pair of uprights 7 before and at least one step 8 transversely connecting the uprights 7 before. In the illustrated example, the step 1 comprises four steps 8. Alternatively, a number of steps 8 less than or greater than four could be provided (including three or five). The amounts 7 are in this case formed of profiles in a metallic material (for example aluminum or aluminum alloy) or composite, for example based on vegetable fibers (for example flax fiber) or mineral fibers (e.g. . glass fiber), in particular U-section 9 at lower ends, the uprights 7 are provided with non-slip pads 10.

Le plan 3 arrière comprend une paire de montants 11 arrière et au moins une marche 8 reliant les montants 11 arrière. Dans l'exemple illustré, le plan 3 arrière comprend trois marches 8. En fonction de la hauteur du marchepied 1, le nombre de marches 8 pourrait être différent. Les montants 11 arrière sont de fabrication et de forme similaires aux montants 7 avant. A des extrémités 12 inférieures, les montants 11 arrière sont munis de patins 10 antidérapants. Lorsque le marchepied 1 est en configuration déployée (illustrée sur la figure 1), le plan 3 arrière forme un angle aigu avec le plan 2 avant, et les extrémités 12 inférieures des montants 11 arrière forment, avec les extrémités 9 inférieures des montants 7 avant, un plan 13 de pose pour le marchepied 1. On définit également un plan 14 médian du marchepied 1, ce plan 14 médian étant perpendiculaire au plan 13 de pose et équidistant des montants 7 du plan 2 avant et des montants 11 du plan 3 arrière.The rear plane 3 comprises a pair of rear uprights 11 and at least one step 8 connecting the rear uprights 11 . In the example shown, the rear plane 3 comprises three steps 8. Depending on the height of the step 1 , the number of steps 8 could be different. The rear pillars 11 are of similar construction and shape to the front pillars 7 . At lower ends 12, the rear pillars 11 are provided with non-slip pads 10. When step 1 is in deployed configuration (shown on figure 1 ), the Rear plane 3 forms an acute angle with the front plane 2 , and the lower ends 12 of the rear uprights 11 form, with the lower ends 9 of the uprights 7 before, a laying plane 13 for the step 1. A plane 14 is also defined. median of the step 1 , the median plane 14 being perpendicular to the plane 13 of installation and equidistant from the uprights 7 of the front plane 2 and uprights 11 of the rear plane 3 .

Comme on le voit sur la figure 1, les montants 7 du plan 2 avant, destinés à former un plan de montée permettant à un utilisateur d'atteindre des zones en hauteur, sont de largeur supérieure aux montants 11 du plan 3 arrière. On notera que, bien que les marches 8 du plan 3 arrière aient pour fonction première d'assurer la rigidité du plan 3 arrière, elles sont suffisamment rigides pour pouvoir constituer, à l'occasion, des marches d'appoint.As we see on the figure 1 , the uprights 7 of the front plane 2 , intended to form a rise plan allowing a user to reach areas in height, are wider than the uprights 11 of the rear plane 3 . Note that, although the steps 8 of the rear plane 3 have the primary function of ensuring the rigidity of the rear plane 3 , they are rigid enough to be able, on occasion, make extra steps.

Le mécanisme 4 d'arrêt à compas monté entre les plans 2, 3 avant et arrière pour bloquer le marchepied 1 en configuration déployée comprend un cadre 5 mutuellement articulé avec deux biellettes 6. The mechanism 4 of compass stop mounted between the planes 2 , 3 front and rear to block the step 1 deployed configuration comprises a frame 5 mutually articulated with two rods 6.

Le cadre 5 comprend une base 15 et deux bras 16 faisant saillie de la base 15, chaque bras 16 étant monté articulé par rapport à un montant 11 du plan 3 arrière autour d'un axe 17 arrière d'articulation.The frame 5 comprises a base 15 and two arms 16 protruding from the base 15 , each arm 16 being hinged relative to an upright 11 of the rear plane 3 about a hinge axis 17 rear.

Selon un mode de réalisation illustré sur les figures et plus particulièrement la figure 2, le cadre 5 comprend une base 15 et deux bras 16 symétriques par rapport au plan 14 médian du marchepied 1, ces deux bras 16 faisant saillie perpendiculairement à la base 15. Chaque bras 16 inclut une portion 18 principale, une portion intermédiaire 19 et une patte 20 de fixation. La portion 19 intermédiaire est sensiblement orientée de façon perpendiculaire à la portion 18 principale (c'est-à-dire suivant l'axe Y) et elle s'étend à partir de la portion 18 principale vers l'extérieur du cadre 5. La patte 20 de fixation est sensiblement orientée de façon perpendiculaire à la portion 19 intermédiaire, sensiblement parallèle à la portion 18 principale (c'est-à-dire suivant X) et elle s'étend à partir de la portion 19 intermédiaire dans une direction opposée à la base 15. According to an embodiment illustrated in the figures and more particularly the figure 2 , the frame 5 comprises a base 15 and two arms 16 symmetrical with respect to the median plane 14 of the step 1 , these two arms 16 protruding perpendicular to the base 15. Each arm 16 includes a main portion 18 , an intermediate portion 19 and a bracket 20 for fixing. The intermediate portion 19 is substantially oriented perpendicular to the main portion 18 (that is to say along the Y axis) and extends from the main portion 18 towards the outside of the frame 5. The The bracket 20 is substantially oriented perpendicularly to the intermediate portion 19 , substantially parallel to the main portion 18 (i.e., along X) and extends from the intermediate portion 19 in an opposite direction. at the base 15.

Le cadre 5 est par exemple réalisé tout d'abord par la découpe d'une lamelle au sein d'une tôle (par exemple en acier ou en aluminium), cette lamelle étant ensuite pliée selon les dimensions souhaitées. En variante, le cadre 5 est réalisé par moulage ou tout autre procédé connu.The frame 5 is for example made firstly by cutting a lamella within a sheet (for example steel or aluminum), this lamella being then folded according to the dimensions desired. Alternatively, the frame 5 is made by molding or any other known method.

Suivant un mode de réalisation illustré notamment sur la figure 2, le cadre 5 est monté articulé sur les montants 11 du plan 3 arrière par l'intermédiaire des pattes 20 de fixation. En effet, chaque patte 20 de fixation est montée sur un des montants 11 arrière via une vis 17 et un écrou 21, le bras 16 du cadre 5 restant libre en rotation autour de la vis 17, celle-ci formant ainsi l'axe 17 arrière d'articulation. Une entretoise 22 est intercalée entre la surface 23 interne du montant 11 arrière et la surface 24 externe de la patte 20 de fixation, cette entretoise 22 ayant pour fonction de limiter les frottements et ainsi faciliter les manoeuvres du mécanisme 4 d'arrêt. Cette entretoise 22 est par exemple réalisée dans un matériau à faible coefficient de frottement tel que du téflon ® ou du nylon.According to an embodiment illustrated in particular on the figure 2 , the frame 5 is hingedly mounted on the uprights 11 of the rear plane 3 through the brackets 20 . Indeed, each bracket 20 is mounted on one of the rear uprights 11 via a screw 17 and a nut 21 , the arm 16 of the frame 5 remaining free to rotate about the screw 17 , the latter thus forming the axis 17 rear hinge. A spacer 22 is interposed between the inner surface 23 of the rear upright 11 and the outer surface 24 of the bracket 20 , this spacer 22 having the function of limiting friction and thus facilitate maneuvers of the stop mechanism 4 . This spacer 22 is for example made of a low friction material such as teflon ® or nylon.

La fixation de chaque bras 16 sur un montant 11 du plan 3 arrière est réalisée en l'espèce par une vis 17 à tête cylindrique à six lobes internes et un écrou 21 hexagonal fendu, on pourrait recourir à tout autre type de vis 17 et d'écrou 21 ainsi qu'à tout autre moyen de fixation analogue tel que par exemple un rivet.The fixing of each arm 16 on a post 11 11 of the rear plane 3 is made in this case by a screw 17 with cylindrical head with six lobes and a hexagonal nut 21 slotted, it could be used to any other type of screw 17 and d nut 21 as well as any other similar fastening means such as for example a rivet.

Le mécanisme 4 d'arrêt comprend également deux biellettes 6 chacune montée articulée d'une part, par rapport à un montant 7 du plan 2 avant, par une extrémité 25 externe, autour d'un axe 26 avant d'articulation, et, d'autre part, par rapport au cadre 5, par une extrémité 27 interne, autour d'un axe 28 central d'articulation de sorte que, dans la configuration déployée, la base 15 du cadre 5 vient en appui sur les biellettes 6, et, dans la configuration repliée, les biellettes 6 et le cadre 5 sont sensiblement parallèles aux plans 2, 3 avant et arrière du marchepied 1. Chaque biellette 6 se présente sous la forme d'un fil, l'extrémité 25 externe étant coudée pour former l'axe 26 avant d'articulation et l'extrémité 27 interne coudée pour former l'axe 28 central d'articulation. 4 stop mechanism also comprises two rods 6 each mounted articulated on the one hand, relative to an amount of 7 back plane 2 at one end 25 externally, about an axis 26 before joint, and, on the other hand, with respect to the frame 5 , by an internal end 27 , around a central hinge axis 28 so that, in the deployed configuration, the base 15 of the frame 5 bears on the links 6 , and , in the folded configuration, the rods 6 and the frame 5 are substantially parallel to the planes 2, 3 front and rear of the step 1. Each rod 6 is in the form of a wire, the outer end 25 being bent to form the axis 26 before hinge and the inner end 27 bent to form the central axis 28 articulation.

Selon un mode de réalisation représenté sur les dessins, chaque biellette 6 comprend un tronçon 29 central linéaire délimité par une extrémité 27 interne et une extrémité 25 externe. Les biellettes 6 sont symétriques selon le plan 14 médian du marchepied 1. According to an embodiment shown in the drawings, each link 6 comprises a linear central section 29 delimited by an inner end 27 and an outer end 25 . The rods 6 are symmetrical in the median plane 14 of the step 1.

Plus précisément, l'extrémité 25 externe de la biellette 6 inclut un tronçon 30 intermédiaire externe coudé précédant un tronçon 26 final externe coudé. En effet, le tronçon 30 intermédiaire externe est sensiblement orienté de façon perpendiculaire au tronçon 29 central (c'est-à-dire suivant l'axe Z), il s'étend à partir du tronçon 29 central en direction de la partie supérieure du marchepied 1 lorsque celui-ci est en configuration déployée. Le tronçon 26 final externe est sensiblement orienté de façon perpendiculaire au tronçon 30 intermédiaire externe (c'est-à-dire suivant l'axe Y), il s'étend à partir du tronçon 30 intermédiaire externe dans la direction opposée au plan 14 médian du marchepied 1. Dans ce mode de réalisation, le tronçon 26 final externe est l'axe 26 avant d'articulation.More specifically, the outer end 25 of the rod 6 includes a portion 30 angled outer intermediate 26 preceding a final section external bent. Indeed, the external intermediate section 30 is substantially oriented perpendicular to the central section 29 (that is to say along the Z axis), it extends from the central section 29 towards the upper part of the step 1 when it is in deployed configuration. The final outer portion 26 is oriented substantially perpendicular to the intermediate portion 30 external (that is to say along the Y axis), it extends from the outer portion 30 intermediate in the opposite direction to the median plane 14 1. In this embodiment, the outer end section 26 is the front articulation axis 26 .

Selon un mode de réalisation illustré sur les figures et notamment sur la figure 4, l'axe 26 avant d'articulation de chaque biellette 6 est monté articulé à un montant 7 du plan 2 avant sous une marche 8 par l'intermédiaire d'un support 31, cette disposition permettant d'isoler le mécanisme 4 d'arrêt à compas et ainsi d'éviter tout risque d'interférences avec l'utilisateur lors de l'utilisation du marchepied 1. Ainsi, deux supports 31 se présentant sous la forme d'un boitier sont positionnés sous une marche 8 du plan 2 avant de part et d'autre de celle-ci, chaque support 31 possédant une forme extérieure sensiblement analogue à la forme interne de la marche 8 de sorte que les boitiers s'intègrent au sein de celle-ci, les supports 31 étant solidarisés aux montants 7 du plan 2 avant par l'intermédiaire de rivets 32. Chaque support 31 comporte un fût 33 fendu débouchant dans lequel est introduit l'axe 26 avant d'articulation d'une biellette 6, la biellette 6 étant libre de pivoter autour de l'axe 26 avant d'articulation, la présence de la fente 34 sur le fût 33 permettant de faciliter l'insertion de l'axe 26 avant d'articulation lors du montage. Chaque montant 7 du plan 2 avant possède un trou 35 coaxial avec le fût 33, dans lequel l'axe 26 avant d'articulation est introduit, celui-ci faisant ainsi saillie de la surface 36 externe du montant 7 avant et étant arrêté axialement en position par une rondelle 37 à dents intérieures positionnée sur le bout de celui-ci.According to an embodiment illustrated in the figures and in particular on the figure 4 , the axis 26 before hinge of each rod 6 is hingedly mounted to an upright 7 of the front plane 2 under a step 8 by means of a support 31 , this arrangement for isolating the stop mechanism 4 to compass and thus to avoid any risk of interference with the user when using the step 1. Thus, two supports 31 in the form of a housing are positioned under a step 8 of the plane 2 before either side, each support 31 having an outer shape substantially similar to the inner shape of the step 8 so that the boxes are integrated within it, the supports 31 being secured to the uprights 7 from the front plane 2 by means of rivets 32. Each support 31 has a slotted open stem 33 into which is inserted the axis 26 before articulation of a link 6 , the link 6 being free to pivot around the axis 26 before articulation, the presence of the slot 34 on the shaft 33 to facilitate the insertion of the axis 26 before articulation during assembly. Each upright 7 of the front plane 2 has a hole 35 coaxial with the shank 33 , in which the hinge axis 26 is introduced, the latter thus protruding from the outer surface 36 of the upright 7 before and being axially stopped by position by a washer 37 with inner teeth positioned on the end thereof.

L'arrêt axial de l'axe 26 avant d'articulation est réalisé en l'espèce par une rondelle 37 à dents intérieures, on pourrait avoir par exemple un bout d'axe 26 avant d'articulation fileté faisant saillie de la surface 36 externe du montant 7 avant sur lequel est vissé un écrou.The axial stop of the axis 26 before hinge is made in this case by a washer 37 with inner teeth, one could have for example an end of axis 26 before threaded articulation projecting from the outer surface 36 of the amount 7 before which is screwed a nut.

Le rôle du tronçon 30 intermédiaire externe est entre autres de permettre le repliement total du marchepied 1 en prenant en compte la présence de la marche 8 tel qu'on peut le voir sur la figure 6.The role of the external intermediate section 30 is, inter alia, to allow the total folding of the step 1 taking into account the presence of the step 8 as can be seen on the figure 6 .

Selon un mode de réalisation représenté sur les dessins, l'extrémité 27 interne de la biellette 6 inclut un tronçon 38 intermédiaire interne coudé précédant un tronçon 28 final interne coudé. En effet, le tronçon 38 intermédiaire interne est sensiblement orienté de façon perpendiculaire au tronçon 29 central (c'est-à-dire suivant Z), il s'étend à partir du tronçon 29 central en direction de la partie supérieure du marchepied 1 lorsque celui-ci est en configuration déployée. Le tronçon 28 final interne est sensiblement orienté de façon perpendiculaire au tronçon 38 intermédiaire interne (c'est-à-dire suivant l'axe Y), il s'étend à partir du tronçon 38 intermédiaire interne dans la direction opposée au plan 14 médian. Dans ce mode de réalisation, le tronçon 28 final interne est l'axe 28 central d'articulation.According to one embodiment shown in the drawings, the inner end 27 of the rod 6 includes an inner intermediate bent section 38 preceding an inner bent end section 28 . Indeed, the inner intermediate section 38 is substantially oriented perpendicularly to the central section 29 (that is to say along Z), it extends from the central section 29 towards the upper part of the step 1 when it is in deployed configuration. The inner end portion 28 is substantially perpendicularly oriented to the inner intermediate portion 38 (i.e. along the Y axis), it extends from the inner intermediate portion 38 in the opposite direction to the median plane 14 . In this embodiment, the final internal section 28 is the central articulation axis 28 .

Selon un mode de réalisation illustré sur les figure et notamment sur la figure 3, l'axe 28 central d'articulation de chaque biellette 6 est monté articulé sur un des bras 16 du cadre 5. En effet, chaque bras 16 possède un trou 39 dans lequel est introduit l'axe 28 central d'articulation, celui-ci faisant saillie de la surface 40 externe du bras 16 du cadre 5, l'axe 28 central d'articulation comprenant deux épaulements 41, 42 positionnés de part et d'autre du bras 16 du cadre 5, un épaulement 41 interne et un épaulement 42 externe permettant de l'arrêter axialement. Cette solution n'est en rien limitative, l'épaulement 42 externe pourrait être remplacé par exemple en réalisant un filetage sur le bout de l'axe 28 central d'articulation, celui-ci faisant ainsi saillie de la surface 40 externe du bras 16 du cadre 5, un écrou étant ensuite vissé sur le bout fileté pour réaliser l'arrêt axial.According to an embodiment illustrated in the figures and in particular on the figure 3 , the central axis 28 of articulation of each link 6 is articulated on one of the arms 16 of the frame 5. In fact, each arm 16 has a hole 39 into which is inserted the central axis 28 of articulation, that- projecting from the outer surface 40 of the arm 16 of the frame 5 , the central articulation axis 28 comprising two shoulders 41 , 42 positioned on either side of the arm 16 of the frame 5 , an internal shoulder 41 and a shoulder 42 external to stop it axially. This solution is in no way limiting, the outer shoulder 42 could be replaced for example by making a thread on the end of the central axis 28 hinge, the latter thus projecting from the outer surface 40 of the arm 16 frame 5 , a nut is then screwed on the threaded end to achieve the axial stop.

Chaque biellette 6 est par exemple obtenue par le cintrage ou le pliage d'un fil (par exemple en acier ou aluminium). Les épaulements 41, 42 internes et externes correspondant à un écrasement de matière peuvent par exemple être réalisés par estampage ou matriçage.Each link 6 is for example obtained by bending or folding a wire (for example steel or aluminum). The internal and external shoulders 41 , 42 corresponding to a crushing of material may for example be made by stamping or stamping.

Afin de faciliter les manoeuvres du mécanisme 4 d'arrêt à compas, celui-ci comprend une poignée 43 ergonomique solidaire de la base 15 du cadre 5. Selon un mode de réalisation, la poignée 43 est fixée sur la base 15 du cadre 5 par clipsage. En variante, la poignée 43 peut être fixée par exemple par rivetage, vissage ou boulonnage.In order to facilitate maneuvers of the compass stop mechanism 4 , it comprises an ergonomic handle 43 secured to the base 15 of the frame 5. According to one embodiment, the handle 43 is fixed on the base 15 of the frame 5 by clipping. Alternatively, the handle 43 may be fixed for example by riveting, screwing or bolting.

Lorsque le marchepied 1 est en configuration repliée, le mécanisme 4 d'arrêt à compas est en position repliée, les biellettes 6 et le cadre 5 sont sensiblement parallèles aux plans 2, 3 avant et arrière du marchepied 1. When the step 1 is in folded configuration, the mechanism 4 of compass stop is in the folded position, the rods 6 and the frame 5 are substantially parallel to the planes 2 , 3 front and rear of the step 1.

Lorsque le marchepied 1 est en configuration déployée, le mécanisme 4 d'arrêt est en position déployée, les biellettes 6 s'étendant alors sensiblement dans le prolongement du cadre 5. Plus précisément, la surface 44 inférieure de la base 15 du cadre 5 vient en appui sur les biellettes 6 telle que représentée sur la figure 5. Dès lors, le marchepied 1 est maintenu et sécurisé en position déployé.When the step 1 is in deployed configuration, the stop mechanism 4 is in the deployed position, the rods 6 then extending substantially in the extension of the frame 5. More specifically, the lower surface 44 of the base 15 of the frame 5 comes resting on the links 6 as represented on the figure 5 . Therefore, the step 1 is maintained and secured in the deployed position.

Selon une variante de réalisation représentée sur la figure 7, la base 15 du cadre 5 possède deux encoches 45 rectangulaires dans lesquelles viennent s'introduire les biellettes 6 lorsque le marchepied 1 est en configuration déployée. L'introduction des biellettes 6 au sein des encoches 45 permet de limiter les déplacements des biellettes 6 par rapport au cadre 5 et apporte ainsi une plus grande stabilité au marchepied 1. According to an alternative embodiment represented on the figure 7 the base 15 of the frame 5 has two rectangular notches 45 in which are introduced the rods 6 when the step 1 is in deployed configuration. The introduction of the links 6 within the notches 45 limits the movements of the rods 6 relative to the frame 5 and thus provides greater stability to the step 1.

Lorsque l'utilisateur souhaite passer de la position déployée à la position repliée, il lui suffit d'exercer une traction sur la poignée 43 pour ramener le mécanisme 4 d'arrêt en position repliée.When the user wishes to move from the deployed position to the folded position, it suffices to exert traction on the handle 43 to return the stop mechanism 4 in the folded position.

Le marchepied 1 qui vient d'être décrit procure un certain nombre d'avantages :

  • il offre une meilleure sécurité d'utilisation, grâce à l'implantation du mécanisme 4 d'arrêt à compas et à la géométrie des biellettes 6 associée à la disposition des axes 26, 17 avant et arrière d'articulation ;
  • il possède un nombre relativement faible de pièces, au bénéfice de la simplicité de fabrication et de la facilité de la maintenance ;
  • il offre une meilleure stabilité et notamment dans le mode de réalisation où la base 15 du cadre 5 possède des encoches 45 ;
  • il offre une simplicité d'utilisation grâce notamment à l'implantation d'une poignée ergonomique 43.
The step 1 that has just been described provides a number of advantages:
  • it offers better safety of use, thanks to the implementation of the mechanism 4 stop compass and the geometry of the links 6 associated with the arrangement of the axes 26 , 17 front and rear articulation;
  • it has a relatively small number of parts, for the benefit of simplicity of manufacture and ease of maintenance;
  • it offers better stability and especially in the embodiment where the base 15 of the frame 5 has notches 45 ;
  • it offers simplicity of use thanks to the implementation of an ergonomic handle 43.

En effet, l'implantation notamment des biellettes 6 sous une marche 8 du plan 2 avant permet d'éviter toutes interférences entre le mécanisme 4 d'arrêt à compas et l'utilisateur, au bénéfice de la fiabilité du mécanisme 4 d'arrêt à compas et de la sécurité de l'utilisateur.Indeed, the implementation of the rods 6 in particular a step 8 of the front plane 2 avoids any interference between the 4 stop mechanism and the user, the benefit of the reliability of the mechanism 4 stop at compass and the safety of the user.

De même, la géométrie des biellettes 6 associée au fait que les axes 26, 17 avant et arrière d'articulation ne soient pas compris dans un même plan parallèle au plan 13 de pose, permet d'accentuer le blocage du marchepied 1 en configuration déployée, au bénéfice de la sécurité de l'utilisateur.Similarly, the geometry of the rods 6 associated with the fact that the axes 26 , 17 front and rear hinge are not included in the same plane parallel to the plane 13 of laying, allows to accentuate the blocking of the step 1 in deployed configuration , for the benefit of the user's security.

Enfin, le nombre de pièces est relativement faible (outre les montants 7, 11 et les marches 8, on dénombre deux biellettes 6, un cadre 5, deux supports 31, une poignée 43, deux rondelles 37, deux vis 17, deux écrous 21 et deux entretoises 22).Finally, the number of parts is relatively small (besides the uprights 7 , 11 and steps 8 , there are two links 6 , a frame 5 , two supports 31 , a handle 43 , two washers 37 , two screws 17 , two nuts 21 and two spacers 22 ).

Claims (9)

  1. Stepladder (1) comprising:
    - a front plane (2) comprising a pair of front side rails (7) and a series of steps (8) connecting the front side rails (7);
    - a rear plane (3) comprising a pair of rear side rails (11) and mounted in an articulated manner with respect to the front plane (2) such that the stepladder (1) can adopt a folded configuration in which the front and rear planes (2), (3) are substantially parallel to one another, and a deployed configuration in which the front and rear planes (2), (3) together form an acute angle;
    - a stay-type arresting mechanism (4) mounted between the front and rear planes (2), (3) to block the stepladder (1) in the deployed configuration;
    the arresting mechanism (4) comprising:
    - a frame (5) having a base (15) and two arms (16) projecting from the base (15), each arm (16) being mounted in an articulated manner with respect to a side rail (11) of the rear plane (3) about a rear axis of articulation (17);
    - two connecting rods (6) each mounted in an articulated manner, on the one hand, with respect to a side rail (7) of the front plane (2), by an outer end (25), about a front axis of articulation (26), and, on the other hand, with respect to the frame (5), by an inner end (7), about a central axis of articulation (28) such that, in the deployed configuration, the base (15) of the frame (5) bears on the connecting rods (6), and, in the folded configuration, the connecting rods (6) and the frame (5) are substantially parallel to the front and rear planes (2), (3) of the stepladder (1),
    each connecting rod (6) takes the form of a wire, the outer end (25) being bent to form the front axis of articulation (26), characterized in that the inner end (27) is bent to form the central axis of articulation (28) .
  2. Stepladder (1) according to Claim 1, characterized in that each connecting rod (6) is mounted in an articulated manner by the central axis of articulation (28) on an arm (16) of the frame (5).
  3. Stepladder (1) according to Claim 2, characterized in that each arm (16) of the frame (5) has a hole (39) into which the central axis of articulation (28) of the connecting rod (6) is introduced.
  4. Stepladder (1) according to either of Claims 2 and 3, characterized in that the central axis of articulation (28) of each connecting rod (6) comprises two shoulders (41, 42) positioned on either side of the arm (16) of the frame (5).
  5. Stepladder (1) according to one of the preceding claims, characterized in that each connecting rod (6) is mounted in an articulated manner by the front axis of articulation (26) to a side rail (7) of the front plane (2) via a support (31).
  6. Stepladder (1) according to Claim 5, characterized in that each support (31) has a sleeve (33) into which the front axis of articulation (26) of the outer end (25) of the connecting rod (6) is introduced.
  7. Stepladder (1) according to one of the preceding claims, characterized in that the front axis of articulation (26) is positioned below a step (8) of the front plane (2).
  8. Stepladder (1) according to one of the preceding claims, characterized in that the outer end (25) of each connecting rod (6) comprises a bent outer intermediate section (30) preceding a bent outer final section, the outer final section being the front axis of articulation (26).
  9. Stepladder (1) according to one of the preceding claims, characterized in that the arresting mechanism (4) comprises a handle (43) secured to the base (15) of the frame (5).
EP15164550.4A 2015-04-21 2015-04-21 Step comprising a stopping mechanism with a stay Not-in-force EP3085879B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15164550.4A EP3085879B1 (en) 2015-04-21 2015-04-21 Step comprising a stopping mechanism with a stay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15164550.4A EP3085879B1 (en) 2015-04-21 2015-04-21 Step comprising a stopping mechanism with a stay

Publications (2)

Publication Number Publication Date
EP3085879A1 EP3085879A1 (en) 2016-10-26
EP3085879B1 true EP3085879B1 (en) 2018-01-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15164550.4A Not-in-force EP3085879B1 (en) 2015-04-21 2015-04-21 Step comprising a stopping mechanism with a stay

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EP (1) EP3085879B1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US621479A (en) * 1899-03-21 Step-ladder
US2409266A (en) * 1945-01-09 1946-10-15 Victor M Fowler Ladder
DE1131856B (en) * 1958-03-19 1962-06-20 Walther Zarges Dipl Ing Collapsible, two-legged ladder that can be climbed on both sides
DE2903781C3 (en) * 1979-02-01 1981-12-17 Hailo-Werk Rudolf Loh Gmbh & Co Kg, 6342 Haiger Folding step
US4600080A (en) * 1984-03-19 1986-07-15 Forrester Charles R Three-legged stepladder
GB2239479B (en) * 1989-11-28 1993-11-03 Grayston Central Services Step-ladders
AU632929B2 (en) 1990-05-17 1993-01-14 Hills Industries Limited An improved stepladder

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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