EP2818625A1 - Trittleiter mit versenkbaren Rädern, die vom Geländer aus gesteuert werden - Google Patents

Trittleiter mit versenkbaren Rädern, die vom Geländer aus gesteuert werden Download PDF

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Publication number
EP2818625A1
EP2818625A1 EP14171331.3A EP14171331A EP2818625A1 EP 2818625 A1 EP2818625 A1 EP 2818625A1 EP 14171331 A EP14171331 A EP 14171331A EP 2818625 A1 EP2818625 A1 EP 2818625A1
Authority
EP
European Patent Office
Prior art keywords
plane
lever
uprights
barrier
train
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14171331.3A
Other languages
English (en)
French (fr)
Other versions
EP2818625B1 (de
Inventor
Patrick Lachant
Olivier Morel
Georges CHALAIN
Jean-Paul Benard
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.)
CDH Group SAS
Original Assignee
CDH Group SAS
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 CDH Group SAS filed Critical CDH Group SAS
Publication of EP2818625A1 publication Critical patent/EP2818625A1/de
Application granted granted Critical
Publication of EP2818625B1 publication Critical patent/EP2818625B1/de
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
    • E06C1/38—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
    • E06C1/397—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 characterised by having wheels, rollers, or runners
    • 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
    • E06C1/39—Ladders having platforms; Ladders changeable into platforms
    • E06C1/393—Ladders having platforms foldable 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
    • E06C7/18—Devices for preventing persons from falling
    • E06C7/181—Additional gripping devices, e.g. handrails
    • E06C7/182—Additional gripping devices, e.g. handrails situated at the top of 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
    • E06C7/18—Devices for preventing persons from falling
    • E06C7/181—Additional gripping devices, e.g. handrails
    • E06C7/183—Additional gripping devices, e.g. handrails situated along 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
    • E06C7/42—Ladder feet; Supports therefor
    • E06C7/46—Non-skid equipment

Definitions

  • the invention relates to running boards, including the individual rolling platform type (PIR) as defined by French standards NF P 93-352 and NF P 93-353.
  • PIR rolling platform type
  • a step conventionally comprises a front plane having two front uprights and at least one step connecting the front uprights, and a rear plane having two rear uprights and at least one bar connecting the rear uprights, hinged mounted relative to the front plane.
  • the footboards of the PIR type further include a floor mounted between the front plane and the rear plane to allow an operator to work at height without fatigue, his two feet resting flat on the floor, and wheels facilitating the movement of the footboard .
  • the steps of this type are folding, the rear plane tilting on the front plane to allow easy storage and relatively compact footboard.
  • the step is equipped with wheels. More specifically, on a large number of models, the rear plane is provided with wheels fixed to the rear uprights, and which, when the step is unfolded and rests on the ground in the normal working position, are raised above the ground. When the user wishes to move the step, he grasps it by the front upright, tilts it back until the wheels touch the ground, which allows the maneuvering and rolling.
  • US Pat. No. 6,026,931 proposes a structure in which the rear part of the step is provided with spring-mounted rear wheels, whereas the front part of the step is provided with a pair of front wheels mounted on an axis. pivoting, the tilting of the front wheels to a position of displacement being controlled by the foot by actuating a pedal associated with the descent of the user of the step.
  • the reverse tilting of the front wheels to a retracted position is caused by the imposition of a weight (in practice, the weight of the user) on the step.
  • the sole weight of the leg on the first step is not sufficient to cause the tilting of the front wheels to their retracted position. The user is therefore exposed to the risk of falling if he does not impose, at the first step, a sufficient weight to the running board.
  • a first objective is to propose a rolling step that can be moved without difficulty by the user.
  • a second objective is to propose a rolling step which presents a better ergonomics for the user.
  • a third objective is to provide a rolling step providing enhanced safety for the user.
  • Actuation of the lever by folding at least one of the railing barriers causes the deployment of the front axle, which allows to temporarily place the step in a rolling configuration for easy movement, guardrails folded.
  • the barrier (s) is (are) redeployed (s)
  • the front axle regains its retracted position by gravity, the step then resting on the ground at least by its front uprights, which allows the user to climb on without risk of evasion.
  • step 1 On the figure 1 is represented a step 1 intended to allow work at height.
  • the step 1 is of the individual rolling platform type.
  • the step 1 comprises a front plane 2 having a pair of uprights 3 front and at least one step 4 transversely connecting the uprights 3 before.
  • the step 1 comprises a single step 4 .
  • several steps could be provided.
  • the amounts 3 are in this case formed of metal profiles (for example aluminum or aluminum alloy), in particular rectangular section. At lower ends 5, the uprights 3 are provided with pads 6 slip.
  • the step 4 is formed of a folded cut sheet.
  • the step 4 has a grooved upper surface 7 to promote the attachment of the shoes of the user, and is fixed to the uprights 3 by means of jumpers 8 made of plastic riveted to the uprights 3.
  • the step 1 further comprises a rear plane 9 hinged to the front plane 2 and having a pair of rear uprights 10 and at least one bar 11 connecting the rear uprights 10 .
  • the rear uprights 10 are, like before uprights 3, formed of metal profiles (e.g. aluminum or aluminum alloy), in particular a rectangular section. At lower ends 12, the rear uprights 10 are provided with pads 6 slip.
  • the step 1 is unfolded (configuration illustrated on the Figures 1 to 7 and 10 to 14 )
  • the rear plane 9 forms an angle with the plane 2 before, and the ends 12 lower amounts rear 10 form, with the 5 lower ends of the uprights 3 before a laying plane P (dotted line) for one step, corresponding to an ideally flat ground S which would support the footboard 1.
  • the rear plane 9 comprises three bars 11. These bars 11 are in this case square section, but this section could be circular or oval. Depending on the height of the step 1, the number of bars 11 could be different (especially higher). Fixing the bars 11 rear uprights 10 is here made by bouterollage.
  • the rear plane is mounted articulated with respect to the plane of the two front ends 13 of the upper rear uprights 10, which are shorter than the uprights 3 before.
  • the pivot axis of the rear plane is formed by screws 14 secured to fixed plates 15 (in this case by bolting) on external lateral faces of the uprights 3 before, as shown in the figures.
  • the step 1 further comprises a floor 16 which extends astride between the front plane 2 and the rear plane 9 in unfolded configuration of the step 1.
  • This floor 16 is hingedly mounted relative to the front plane 2 via of a cylindrical lintel 17 fitted on a bar 18 connecting the uprights 3 before.
  • the floor 16 is also articulated relative to the rear plane 9 by means of connecting rods 19, the floor 16 resting in the deployed configuration, a rod 11 connecting the struts 10 back.
  • the floor 16 may be provided with a baseboard 20 covering three sides of the floor 16, with the exception of a front edge to facilitate the access of the user to the floor 16 by plane 2 before.
  • This baseboard 20 forms a stop for the feet of the user and thus prevents it from tripping, limiting the risk of falling.
  • the step 1 is also equipped with a shelf 21 tool holder (or package carrier), which extends transversely between the uprights 3 before, at an upper end thereof.
  • the shelf 21 is fixed to the front uprights 3 by means of fittings 22 overlapping a top bar 11 connecting the rear uprights 10 .
  • the step 1 is also equipped with a railing 23, mounted on the front plane 2 in line with the floor 16 in unfolded configuration of the step 1, and intended to retain the user in case of imbalance, so as to minimize the risk of falling.
  • This railing 23 is collapsible. It comprises a pair of side rails, namely a barrier 24 left and 25 right barrier, each pivotally mounted on a front upright 3 between an extended position (shown in figures 1 , 2 , 4 , 10 , 11 , 12, 13 ) in which each barrier 24, 25 extends substantially perpendicularly to the front plane 2 , and a folded position (illustrated in FIGS. figures 5 , 6 , 7 , 9 , 11 , 14 ) in which each barrier 24, 25 extends substantially parallel to the front plane 2 , in the vicinity of the latter.
  • Each barrier 24, 25 has a U-shaped profile and is preferably formed of a metal tube (for example aluminum or aluminum alloy) folded.
  • Each barrier 24, 25 has an upper section or ramp 26, intended to extend at the height of the trunk of the user (between the belt and the bust), an intermediate section or main 27 current, vertical in the deployed position of the barrier 24, 25 and unfolded configuration of the step 1, and a lower section 28 .
  • Each barrier 24, 25 is hinged relative to the upright 3 before by its ramp 26 and its lower section 28 , both mounted on coaxial pivots 29 (formed in this case by screws) secured to clevises 30 in which are housed in the deployed position, the respective ends of the ramp 26 and the lower section 28 .
  • Flexible sleeves 32 are fitted to the ends of the handrails 27 to stiffen the strength of the barriers 24, 25 and cushion the shocks during their deployment.
  • the guardrail may further comprise a movable gate (not shown), mounted between the barriers (for example in the form of a chain or a bar) to retain the unbalanced user towards the front of the step, while defining the workspace so that only one user can move with ease on the floor 16.
  • a movable gate (not shown), mounted between the barriers (for example in the form of a chain or a bar) to retain the unbalanced user towards the front of the step, while defining the workspace so that only one user can move with ease on the floor 16.
  • the step 1 is provided with retractable wheels.
  • the step 1 is equipped with a pair of retractable rear wheels 33 movably mounted relative to the rear plane 9 between a retracted position in which the rear wheels 33 extend above the laying plane P , and a position deployed in which the rear wheels 33 extend at least partially below the laying plane P.
  • Each rear wheel 33 is permanently biased towards its deployed position by a spring 34 (in this case a compression spring).
  • each rear wheel 33 is mounted on a rear upright 9 by means of a U-shaped mounting plate 35 , comprising a core 36 through which the plate 35 is fixed (in species by screwing) to the amount 10, and two arms 37 projecting transverse.
  • the wheel 33 is mounted at the lower end of a support shaft 38 , slidably fitted to the ends of the arms 37 with the interposition of the spring 34, as illustrated in the inset on the figure 1 , and on the figure 8 .
  • a cover can be fitted on the plate 35 to cover the spring and thus prevent dust and debris from the construction site come to hinder the proper functioning of the spring 34.
  • On the figure 1 only one cache is visible (on the right), the left cache having been omitted (as on the figure 8 ) to reveal the spring 34 and the plate 35.
  • the rear wheels 33 are retracted and the step 1 rests on the ground S, at the rear plane 9 , by its pads 6.
  • the rear wheels 33 are deployed and the step 1 rests, at the rear plane 9 , on the ground S by its rear wheels 33 , the laying plane P being raised relative to the ground S .
  • rear wheels 33 are shown in a position in which they extend substantially parallel to the rear plane 9 , they are however mounted freely pivotable both around their central axis of rolling and around their shaft 38 support.
  • the step 1 further comprises a train 39 rolling forward, equipped with at least one wheel 40 - and in this case a pair of wheels 40 - before retractable (as shown in FIG. figure 1 ).
  • the forward rolling gear 39 is movably mounted relative to the front plane 2 between a retracted position in which the front wheels 40 extend above the laying plane P (FIG. figure 2 ), and an extended position in which the front wheels 40 protrude from the plane P of laying down ( figure 7 ).
  • the undercarriage 39 comprises a cross profile 41 substantially U pivotally mounted between the uprights 3 back in the vicinity of their lower ends 5.
  • the cross-member 41 comprises a central section 42 , which extends transversely, and at the opposite ends of the central section 42 , two angled returns 43 through which the cross-member 41 is rotatably mounted on the uprights 3 before, for example by bolting (but this pivoting attachment could be made by screwing or riveting).
  • the wheels 40 are preferably mounted on the central section 42 in the vicinity of the returns 43, so as to maximize the stability of the step 1, but the wheels 43 could be deported to the center of Central Section 42 .
  • each front wheel 40 is mounted on the cross member 41 by means of a shaft 44 bolted to a bracket 45 secured to the transom 41.
  • each front wheel 40 is freely pivotable both around its axis of travel and around its shaft 44 support.
  • the step 1 further comprises a mechanism 46 for actuating the train 39 before, to control are deployment (in anticipation of the movement of the step 1) or conversely allow it to retract.
  • This actuating mechanism 46 comprises at least one lever 47 maneuvering articulated on a post 3 before, and a rod 48 coupling the lever 47 to the train 39 rolling forward.
  • the fixing of the lever 47 is for example carried out by means of a pivot 49 (such as a bolt) which forms the axis of rotation of the lever 47.
  • the lever 47 is mounted in the vicinity of the articulation of one of the barriers (in this case the barrier 25 right). More specifically, the lever 47 is mounted on the upright 3 to the right of a portion of the barrier 25, in this case to the right of the ramp 26, so that by folding the barrier 25 the ramp 26 abuts against the lever 47 to switch, as will be explained below.
  • the lever 47 is in the form of a U-shaped section (metal or plastic) mounted on the upright 3.
  • the lever 47 has a front wall 50 , of which an end portion opposite the pivot 49 s extends to the right of the ramp 26 of the barrier 25, and two side walls, namely an outer lateral wall 51 and an inner lateral wall 52 , which frame the upright 3 and through which the lever 47 is fixed on the upright 3.
  • One of the sidewalls (in this case the inner wall 52 ) has an end portion 53 protruding from the upright 3 away from the front wall 50 towards the inside of the step 1.
  • this portion 53 end is made a bore 54 in which is introduced a folded upper end 55 of the rod 48 (which is in this case in the form of a metal rod with a small diameter circular section) to achieve the pivot connection between the rod 48 and the lever 47 for maneuvering.
  • one of the returns 43 at right angles to the cross member 41 is pierced with a hole 56 into which an end 57 is inserted. lower folded of the rod 48 to achieve the pivot connection between the rod 48 and the cross 41.
  • the rod 48 runs along the upright 3 before, the bore 54 in the lever 47 and the hole 56 in the crossbar 41 being situated in the vicinity of a rear face of the upright 3.
  • the step 1 is equipped with a guide 58 fixed on the upright 3 substantially midway between the lever 47 and the train 39 rolling forward, and wherein the rod 48 is slidably mounted. This guidance allows to use for the realization of the rod 48 a small diameter rod, which will have the advantage of lightness and visual discretion.
  • the rod 48 along the amount 3 before, it does not present any gene or any risk for the user.
  • the aesthetics of step 1 are also preserved.
  • the front wheel 40 In unfolded configuration of the step 1, whether it supports a load or not, the front wheel 40 extends above the laying plane P. In practice, the wheel 40 before rests by gravity on the ground S, confused in this situation with the laying plane P.
  • the rear wheels 33 are already in the deployed position in the absence of sufficient load on the step 1, it is placed in a rolling configuration ( figure 7 ) where it rests on the ground S by its wheels 33, 40, the laying plane P being raised relative to the ground S.
  • the angular travel of the operating lever 47 (and thus of the crossbar 41) is not necessarily important. In fact, in the illustrated example, this angular stroke is small, of the order of (or less than) about 15 °. It is sufficient that the extended position of the front train 39 causes a slight elevation of the uprights 3 before to allow the running of the step 1.
  • a second lever is provided on the other post 3 before, to ensure control of the tilting of the rolling train 39 before both sides of the step 1.
  • a crossbar can connect the levers to synchronize their tilting, in the manner of a fire door anti-panic bar.
  • the rear plane 9 is shorter than the front plane 2 , so that when the step 1 is folded, the uprights 3 forward exceed rear uprights 10 .
  • the roller 39 front end is deployed and exceeds both the 5 lower ends of the uprights 3 before and ends 12 below the struts 10 back, so that it is possible, while keeping the footrest 1 folded, that is to say that the rear plane 9 is secured to the front plane 2 (for example by means of a strap 59, as illustrated, or using an integrated fixing means, such as a hook, mounted on the rear plane 9 , cooperating with a fastener mounted on the front plane 2 ), to maneuver it by rolling on its wheels 40 before.
  • the shafts 44 of the front wheels are perpendicular to the ground S, so that it is possible to rotate the wheels 40 and thus guide at will the step 1.
  • the operating lever 47 is in the form of a wafer (preferably metal, for reasons of rigidity and robustness), a front section 60 of which projects from the plane 2 front, and a rear section 61 , opposite the front section 60 and separated therefrom by the pivot 49, is provided with a bore 54 for the upper end 55 of the rod 48.
  • the lever 47 extends substantially in line with the rail 26 of one of the barriers (in this case the barrier 25, right), and the front section 60 terminates in a beveled end 62 free.
  • This embodiment is not intended for manual operation of the lever 47, but it is not forbidden for the user to maneuver the lever 47 directly without folding the barrier 25.
  • levers 47 can be provided (one on each amount 3 before), to allow a distribution of efforts.
  • Each lever 47 is in this case tilted by a barrier 25, 26.
  • the simultaneous pivoting of the barriers 25, 26 thus causes the simultaneous tilting of the levers 47, which act in concert on the front gear 39 .
  • the hole 68 is pierced in a lug 69 formed protruding on the lever 47, in a lower portion thereof.
  • the tab 69 is folded substantially square to the outer 51 of the lever 47.
  • the rod 65 pivots around its front end 66 housed in the hole 68 ( figure 14 ).
  • the handle 64 is provided with a portion 70 of upper end pierced with a hole in which is housed the rear end 67 .
  • the lever 47 (and thus the front gear 39 ) can be maneuvered by manual action on the remote handle 64 when the barrier 25 is in its extended position, as shown in FIG. figure 13 , on which arrows indicate the rotational movement of the handle 64 and the lever 47.
  • the action on the handle 64 can be performed as long as the barrier 25 is deployed, and that the user is descended from the step 1, c ' that is to say that it is free of charge.
  • the pivoting of the handle 64 (in this case by manual tightening, in the manner of a bicycle brake) pushes the rod 65 towards the lever 47, causing the tilting thereof around its pivot 49, and therefore the tilting, via the rod 48, of the train 39 before.
  • Folding barrier 25 has the same effects as in the first embodiment.
  • the ramp 26 presses on the front wall 50 of the lever 47 and, by tilting thereof in the folded position of the barrier 25, causes the tilting of the front gear 39 towards its extended position allowing the running of the step 1.
  • This action causes also the tilting of the handle 64 via the rod 65.
  • the return 63 is rendered inactive, the handle 64 being kept tilted via the rod 65 ( figure 14 ).
  • This configuration improves the ergonomics of the step 1 relative to the first embodiment, insofar as the user can, by holding the step 1 by the handrails 27, both deploy the train 39 before and move the step 1 to the desired position, without having to bend or reach for the lever 47.
  • the step 1 which has just been described provides the following advantages in particular.
  • the deployment of the front rolling train 29 can be achieved without difficulty, to the benefit of ergonomics for the user.
  • the running of the step 1 can be achieved without difficulty when the step 1 is folded (with a maintenance of the rear plane 9 against the front plane 2 ) and the barriers 24, 25 of the railing are folded, thanks to the deployment of the train 39 before.
  • lever 47 is provided in the embodiments described, it is possible to mount one on each upright 3, so as to balance the efforts.
  • Each lever can be actuated by a respective barrier, or the two levers can be coupled via a force bar, in the manner of an anti-panic bar.
  • the lever 47 as described above (whatever the embodiment) is mounted to the right of the ramp 26 to avoid structural modifications of the barrier 25.
  • this assembly could be uncomfortable (requiring the user to extend the arm height to reach the lever 47), or impractical, the lever 47 proving out of reach.
  • This piece is for example in the form of a tab or tube secured to a bar connecting the ramp 26 to the lower section 28 parallel to the upright 3, in the vicinity of the pivots 29.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)
  • Toys (AREA)
EP14171331.3A 2013-06-25 2014-06-05 Trittleiter mit versenkbaren Rädern, die vom Geländer aus gesteuert werden Not-in-force EP2818625B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1356095A FR3007449B1 (fr) 2013-06-25 2013-06-25 Marchepied muni de roues escamotables avec commande par garde-corps

Publications (2)

Publication Number Publication Date
EP2818625A1 true EP2818625A1 (de) 2014-12-31
EP2818625B1 EP2818625B1 (de) 2015-11-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14171331.3A Not-in-force EP2818625B1 (de) 2013-06-25 2014-06-05 Trittleiter mit versenkbaren Rädern, die vom Geländer aus gesteuert werden

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EP (1) EP2818625B1 (de)
FR (1) FR3007449B1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3095952A1 (de) * 2015-05-20 2016-11-23 CDH Group Trittbrett mit regulierbarer bretthöhe
CN106285447A (zh) * 2016-09-19 2017-01-04 国网浙江省电力公司温州供电公司 一种电力检修工具
CN106351564A (zh) * 2016-09-19 2017-01-25 国网浙江省电力公司温州供电公司 一种伸缩式绝缘人字梯带电作业绝缘平台
IT201800002173A1 (it) * 2018-01-30 2019-07-30 Ferrero Carlo Barre con ruote dentate piroettanti ed un sistema di sollevamento, adatte per scala doppia
CN110173208A (zh) * 2019-06-11 2019-08-27 包金凤 安装有快速折叠护栏的施工爬梯
CN111042463A (zh) * 2019-12-31 2020-04-21 浙江工贸职业技术学院 一种木板阁楼用折叠楼梯
FR3111940A1 (fr) 2020-06-29 2021-12-31 Cdh Group Battant de portillon pour plateforme de travail en hauteur et plateforme de travail comprenant un tel battant de portillon
EP3940189A1 (de) 2020-07-15 2022-01-19 CDH Group Vorrichtung zum arbeiten in der höhe mit gelenkgeländer und automatischer tür
CN114150997A (zh) * 2021-12-02 2022-03-08 中国船舶工业系统工程研究院 一种舰船用折叠机务工作梯

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10858887B2 (en) 2016-08-11 2020-12-08 Bobo Ladders Llc Boat or recreational vehicle ladder apparatus
CN107083917B (zh) * 2017-05-13 2018-09-21 曙光建设有限公司 一种建筑装修用架梯
CN108729843A (zh) * 2018-05-20 2018-11-02 杨引利 一种便捷式防滑型电力维护用检修梯
FR3113695B1 (fr) 2020-08-27 2022-10-07 Cdh Group Dispositif de travail en hauteur a garde-corps articule et moyen de maintien en position repliee

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Publication number Priority date Publication date Assignee Title
DE522207C (de) * 1931-04-07 Franz Fenninger Feststellvorrichtung fuer fahrbare Stehleitern
US1912509A (en) * 1931-08-13 1933-06-06 Coburn Trolley Track Mfg Compa Ladder
US6026931A (en) 1998-10-26 2000-02-22 Emerson Electric Co. Support frame assembly
US20050029048A1 (en) * 2003-08-04 2005-02-10 Frame William F. Foldable stairway ladder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE522207C (de) * 1931-04-07 Franz Fenninger Feststellvorrichtung fuer fahrbare Stehleitern
US1912509A (en) * 1931-08-13 1933-06-06 Coburn Trolley Track Mfg Compa Ladder
US6026931A (en) 1998-10-26 2000-02-22 Emerson Electric Co. Support frame assembly
US20050029048A1 (en) * 2003-08-04 2005-02-10 Frame William F. Foldable stairway ladder

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3095952A1 (de) * 2015-05-20 2016-11-23 CDH Group Trittbrett mit regulierbarer bretthöhe
FR3036423A1 (fr) * 2015-05-20 2016-11-25 Cdh Group Marchepied a tablette a hauteur reglable
CN106285447A (zh) * 2016-09-19 2017-01-04 国网浙江省电力公司温州供电公司 一种电力检修工具
CN106351564A (zh) * 2016-09-19 2017-01-25 国网浙江省电力公司温州供电公司 一种伸缩式绝缘人字梯带电作业绝缘平台
IT201800002173A1 (it) * 2018-01-30 2019-07-30 Ferrero Carlo Barre con ruote dentate piroettanti ed un sistema di sollevamento, adatte per scala doppia
CN110173208A (zh) * 2019-06-11 2019-08-27 包金凤 安装有快速折叠护栏的施工爬梯
CN111042463A (zh) * 2019-12-31 2020-04-21 浙江工贸职业技术学院 一种木板阁楼用折叠楼梯
FR3111940A1 (fr) 2020-06-29 2021-12-31 Cdh Group Battant de portillon pour plateforme de travail en hauteur et plateforme de travail comprenant un tel battant de portillon
EP3933157A1 (de) 2020-06-29 2022-01-05 CDH Group Türflügel für arbeitsbühne zum arbeiten in der höhe und arbeitsbühne, die einen solchen türflügel umfasst
EP3940189A1 (de) 2020-07-15 2022-01-19 CDH Group Vorrichtung zum arbeiten in der höhe mit gelenkgeländer und automatischer tür
FR3112570A1 (fr) 2020-07-15 2022-01-21 Cdh Group Dispositif de travail en hauteur a garde-corps articule et portillon automatique
CN114150997A (zh) * 2021-12-02 2022-03-08 中国船舶工业系统工程研究院 一种舰船用折叠机务工作梯

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EP2818625B1 (de) 2015-11-04
FR3007449B1 (fr) 2015-07-17

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