EP1657399A2 - Accessoire de stabilisation d'échelle portable - Google Patents

Accessoire de stabilisation d'échelle portable Download PDF

Info

Publication number
EP1657399A2
EP1657399A2 EP05380233A EP05380233A EP1657399A2 EP 1657399 A2 EP1657399 A2 EP 1657399A2 EP 05380233 A EP05380233 A EP 05380233A EP 05380233 A EP05380233 A EP 05380233A EP 1657399 A2 EP1657399 A2 EP 1657399A2
Authority
EP
European Patent Office
Prior art keywords
accessories
ladder
portable
threaded
portable ladder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05380233A
Other languages
German (de)
English (en)
Other versions
EP1657399A3 (fr
Inventor
Giulia Escaleras Escalibur S.L. Piervitali
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.)
Escaleras Escalibur SL
Original Assignee
Escaleras Escalibur SL
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 Escaleras Escalibur SL filed Critical Escaleras Escalibur SL
Publication of EP1657399A2 publication Critical patent/EP1657399A2/fr
Publication of EP1657399A3 publication Critical patent/EP1657399A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/42—Ladder feet; Supports therefor
    • E06C7/44—Means for mounting ladders on uneven ground
    • 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
    • E06C7/423—Ladder stabilising struts

Definitions

  • the present invention relates to accessories that, installed on a portable ladder, increase the lateral stability thereof, therefore increasing the safety of the user who is positioned on said ladder.
  • the portable ladder stabilizing accessories object of this invention may be installed on any conventional ladder, provided the following is borne in mind: the inclination of the side rails of the ladder, the rung profile and the distance between them. Therefore, the adaptation of some constructive elements of the stabilizing accessories to the three points indicated above, permits positioning these stabilizing accessories on both single ladders, with one or more sections, and stepladders, with one or more climbing sections.
  • Ladders can basically be classified in single ladders (single, connectable or extension) and stepladders (with one or more climbing sections). All these types of ladders have the main drawback of the lower level of lateral stability they have, which may cause falls and accidents, which are increased in the event that the ladder rests on uneven surfaces.
  • a stabilizer for ladders which comprises a rigid base, which has a linear groove, which runs parallel to the wall against which the ladder rests and two fastening devices which, fixed to the side beams of the ladder, are introduced inside said groove.
  • the possibility of extending the rigid base, displacing the supports on which it rests, increases the lateral stability of the ladders, while making the lower surface of the supports in a material such as vulcanized rubber increases the resistance to slipping and therefore increases the front stability of the ladders.
  • this invention has several drawbacks, among which is noteworthy the fact that its installation is very complex, as it is necessary to screw the fastening devices to the side beams of the ladder each time one wants to use the stabilizer or leave them permanently installed, thus rendering the ladder useless without the base. Furthermore, the fact that it can be exclusively be used on single ladders limits its scope of application.
  • a “Ladder stabilizer” is known, as is disclosed in the Spanish document ES 2 030 731 T3.
  • This device serves to provide a secure support on the ground, with the ladder in use, irrespective of the size and shape of the side beam of said ladder or the presence of projections on the outer side face of the side beam.
  • the device thus has an advantage over the stabilizer analysed above in that it can be coupled to any model of single ladder, having for this a fastening part which is fixed to the side beam and a footing, connected to the fastening part.
  • the fastening part also has two projections of adjustable length which extend towards the outside of said part, positioned so that the side beam can pass freely between them and be adjusted to the respective faces of the beam edge, when the device is rotated around an axis parallel to the rungs of the ladder.
  • the objective of the present invention is to develop accessories to stabilize ladders, which resolve the aforementioned drawbacks and increase the safety level of the ladders, increasing their lateral stability. In this way, it better complies with the Minimum provisions of health and safety at work , set down in Spain in Royal Decree 486/1997 of 14 April.
  • the object of the present invention is to develop stabilizing accessories for ladders, which may be applied to varied models of portable ladders, whether they are single ladders with one or more sections or stepladders with one or more climbing sections; in short, all those ladders which use rungs, of different section, forming a cavity on the outer face of the side beams.
  • These stabilizers can be applied to any portable ladder, of any model, make, measurement and material (aluminium, iron, fibreglass, plastic, etc.), provided that some constructive elements of the stabilizing accessories, object of this invention, are adapted to the gradient of the side beams of the ladder, to the profile comprising the rungs and to the distance between them.
  • the invention which is described below, has the purpose of providing some types of portable ladders for professional use (without excluding household use) with stabilizers which provide the ladders with high stability, permitting the user to safely and comfortably work at a height.
  • These accessories to stabilize portable ladders provide a very extensive support base, forming a virtual rectangle or square, within which the ladder is situated. In this way, the user, equipped with a helmet and suitable harness, can safely work several metres off the ground, with almost the same convenience that he would enjoy if he was working on scaffolding.
  • the portable ladder stabilizing accessories which form the object of this invention, aim to make up for the shortages of the ladder stabilizers known up the present and which have been analysed in the previous section.
  • these stabilizers are easily installed on the ladder side beams, increasing their lateral stability and therefore, greater safety, preventing them from overturning, whether the ladders are single or stepladders, with one or more climbing sections, further enabling the adaptation of these stabilizers to uneven ground, if there is a certain gradient or it is rough terrain (e.g. when work is performed in the open air).
  • the portable ladder stabilizing accessories basically comprise two assemblies of elements: the first of these assemblies has the function of fastening these stabilizers or supports to the ladder, whilst the second assembly are the actual supports, which extend from the fastening assembly to the ground.
  • the joint between the fastening assembly and the support assembly can be of different types (welding, nuts and bolts, grips, etc.), provided that said joint guarantees both assemblies are safely joined, eliminating the possibility of misalignments in this joint, which may be the cause of an accident, thus invalidating the function of the stabilizing accessories.
  • a possible first application consists of installing two of these stabilizers on the side beams of a single ladder which rests on vertical surfaces, such as walls. This thus increases the lateral stability of the ladder, making it difficult for it to laterally overturn.
  • any vertical support plane such as for example the central area of a warehouse
  • the installation of four accessories to stabilize the ladder, one on each side of the beam thereof, increases the points of support on the ground, whether the ladder is supported on a smooth surface or an irregular surface.
  • these stabilizers increase the lateral stability of the ladder as it increases the number of supports on the floor, which increases the area covered thereby, substantially increasing the torque necessary to be applied before it laterally overturns.
  • a third way of positioning the accessories to stabilize the ladder arises from the need to increase safety during the use of a stepladder, with one or more climbing sections, which is positioned against a wall, i.e. when the ladder, without resting on it, is practically right up against it, with the rungs of all its sections forming a 90° angle with the wall.
  • this installation of the ladder beside a wall may involve, in some cases, the need to dismantle the horizontal base that the stepladders usually incorporate on the widest, lowest section.
  • the installation of four supports would hinder the approximation of the ladder to the wall, for which reason only two stabilizers would be installed on the side beams of the two lower sections, which are furthest from the wall.
  • the ladder is secured by one of its sides with the stabilizing accessories, whilst, on the opposite side, the wall prevents it from overturning.
  • the portable ladder stabilizing accessories object of this invention, enable the adaptation of the ladder to the unevenness of the ground, a possibility which acquires maximum importance when work is performed outside, where it is more typical that the ground is uneven.
  • the stabilizers have, on their lower end, in the area close to the base or plate, which acts as a support on the floor, an endless screw-check nut system, which permits regulating the height of each support, independently from the others, thus overcoming the unevenness of sloping or rough ground, typical of a construction site, where ladders are commonly used.
  • wheels can also be considered, with or without brakes, on the ground supports, instead of plates or together with them. Therefore, the stabilizing accessory can rest on the ground using a plate, a wheel or both, according to well-known construction techniques on scaffolding, cranes, etc.
  • the use of wheels is of great use in moving the extended ladder from one place to another without dismantling it.
  • the fastening assembly so called as it is the assembly of elements which permits installing each one of the stabilizing accessories (1) on the portable ladder (2), fixing it to the corresponding side beam (3), comprises a connector (5), two threaded rods (6), two nuts (7) and two keeper pins (8).
  • the two threaded bars (6) if two stabilizers are mounted, each on one side of the ladder, are common to the fastening assembly of the other side of the ladder (single ladders and stepladders). If the fastening assembly is mounted as indicated in figures 3 and 5, which refer to ladders against the wall, this will further comprise two bushings and corresponding washers by way of tips (12), another two nuts (7) and another two keeper pins (8).
  • the support assembly which will be analysed in greater detail further on, comprises an elbow (13) by way of extension and a support element (14).
  • the connector (5) of the fastening assembly is designed to be adapted to the side beam (3) of the portable ladders (2) and basically consists of a metal part constituted from an L-shaped steel strip. On its inner face, which is opposite the side beam (3), it has two insertion pieces (9), welded at their ends. These insertion pieces (9) are constituted from a steel cylinder, welded on a washer, welded to the L-shaped part and have a through-bore. The external diameter of the insertion pieces (9), and the distance between them, are such that they can be manually introduced, but without looseness, in two of the square hollows formed by the inside of the ladder rungs and which appear on the outer face of the side beams.
  • these insertion pieces (9) have been represented as cylindrical bushings, as in this case the ladder rungs (4) are square profiles. Logically, the shape and dimensions the insertion pieces adopt (9) will be determined by the rung profile of each ladder (rectangular, circular, half-round, trapezoidal, etc.) and their angle so that they tightly penetrate in the rung cavity.
  • the two threaded rods (6) also metal, have a greater length than the width of the portable ladder (2), i.e. it is greater than the sum of the internal width (useful distance between the inner faces of the side beams (3)) and the width of the two side beams (3). Diametral orifices are made (11) at the ends of each threaded rod (6), which traverses it.
  • the threaded rods (6) once the connector (5) is inserted, run along the entire width of the portable ladder (2), through the hollow rungs (4), and protrude at the two sides thereof.
  • two stabilizing accessories (1) are installed in the same section of the ladder. This form of assembly is performed if the stabilizing accessories (1) are installed on a single ladder (figure 1), or on a stepladder with one or more climbing sections, at a distance from a wall (figure 2).
  • the connectors (5) of the two accessories are identical but opposite one another and symmetrical and specular.
  • Each connector (5) is fastened to the side beams (3, 21) by threading the nuts (7) at the ends of the threaded rods (6) which protrude from side beams (3, 21).
  • the nuts (7) are butterfly nuts, commonly called lug nuts, although any other type of nut can be used.
  • nuts will be used which can be tightened by hand, due to their speed of manoeuvre and not requiring spanners or any other tightening tool to be used.
  • a keeper pin (8) is inserted in each one of the diametral orifices (11) of the threaded rods (6), by way of a grip, which, although it does not have the function of immobilising the threaded joint, does prevent the nuts (7) from falling off if they loosen, thus avoiding the possible loss thereof and the misalignment of the entire stabilizing assembly.
  • the position adopted by the ladder of figure 1 prevents it sliding backwards thanks to the stabilizers, remaining fixed and stable in the position in which it has been placed.
  • FIG. 5 shows a semi-exploded view of a second assembly of the stabilizing accessories (1).
  • This second form of assembly is suitable when trying to stabilize a stepladder which is positioned against a wall, as is represented in figure 3.
  • the pair of stabilizing accessories will be mounted on the side of the ladder which is furthest from the wall.
  • a single stabilizing accessory (1) is installed on each section of ladder, meaning that its fastening to the side beams (3) varies with respect to the previous assembly, although both assemblies have in common that the connectors (5) of the supports are also identical, but specular and symmetrical to one another with respect to an imaginary central vertical axis.
  • each connector (5) to the side beam (3), whereon the stabilizing accessory (1) is installed does not vary, although on the opposite side beam (21), which in this case lacks the stabilizing accessory (1), is completed with cylinders by way of tips (12), similar to the insertion pieces (9) welded to the connector (5).
  • the part with the least diameter of these tips (12), also with through-bores, is introduced in the cavity of the rungs (4), on the outer face of the opposite side beam (21), the part of the tips (12) with the greatest diameter remaining visible.
  • the threaded rods (6) traverse these tips (12) and, as in the previous assembly, they are fastened to the opposite side beam (21) by threading the nuts (7).
  • the installation is finalized by introducing the keeper pin (8) in the diametral orifices (11) of the threaded rods (6).
  • the support assembly basically comprises a bent rod or part (13) and a support element (14).
  • the bent rod or part (13) is a steel part, normally tubular, which has a first vertical section (15), which is welded to the connector (5). After a pronounced elbow, the second inclined section (16) of the part is extended to the ground and, at its end, is attached to a third section (17), or internally threaded vertical bushing.
  • this section (16) includes the possibility of incorporating a support (24) which extends from the first section (15), forming the elbow (13), until the second section (16) of said part, to avoid deformations in the elbow (13), due to the stresses it bears.
  • Other possible configurations of this elbow (13) are not rejected, provided that there is a first section (15) perpendicular to the ground and a second section (16) which extends to the ground, joining the first section (15) to a third section or vertical bushing (17).
  • the angles or curves which this section (16) may describe are variable. Even this section of joint (16) may vary provided that the vertical section (15) is resistant with the support base (14), which is also positioned vertically on the ground.
  • the support element (14) consists of a threaded feed screw (18), which, on its lower end, has a flat base (19), which rests on the ground. This base (19), normally circular, may also have other geometrical forms.
  • the threaded feed screw (18) is introduced in the vertical bushing (17) of the elbow (13), thus forming an endless screw-check nut system which permits regulating the height of the support element (14).
  • a threaded lock bushing (22) which remains on the vertical bushing (17), is adjusted on the threaded feed screw (18).
  • a cap is incorporated (20), of rubber or similar, on the upper end of the support element (14), which prevents dirt from entering the threaded feed screw (18) and at the same time acts as a protection element against possible injuries such as bumps or cuts, that the upper end of said part may cause.
  • a similar cap (20) may also be inserted in the upper end of the first section (15) of the elbow (13) with the same purpose.
  • the stabilizing accessories (1) have been installed on the portable ladder (2) and the height of the support elements (14) has been regulated, it includes the possibility of inserting, through the upper part of each of the threaded feed screws (18), a weight (23) which further increases the stability of the assembly.
  • the stabilizing accessory can rest on the ground using a plate, a wheel or both, according to well-known construction techniques on scaffoldings, cranes, etc.
  • the use of wheels is highly useful to move the extended ladder from one place to another without dismantling it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)
EP05380233A 2004-11-12 2005-10-20 Accessoire de stabilisation d'échelle portable Withdrawn EP1657399A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200402727A ES2297961B1 (es) 2004-11-12 2004-11-12 Accesorios estabilizadores de escaleras portatiles.

Publications (2)

Publication Number Publication Date
EP1657399A2 true EP1657399A2 (fr) 2006-05-17
EP1657399A3 EP1657399A3 (fr) 2009-01-21

Family

ID=35695739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05380233A Withdrawn EP1657399A3 (fr) 2004-11-12 2005-10-20 Accessoire de stabilisation d'échelle portable

Country Status (2)

Country Link
EP (1) EP1657399A3 (fr)
ES (2) ES2297961B1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012168684A1 (fr) * 2011-06-10 2012-12-13 Garry Mcdonald Dispositif de support et dispositif amélioré permettant d'accéder à des endroits surélevés
WO2013130012A2 (fr) * 2012-03-02 2013-09-06 Yong Foo Sia Échelle de sécurité
WO2011104700A3 (fr) * 2010-02-24 2015-07-02 Wesolve Limited Équipement de sécurité pour échelle
US20180340371A1 (en) * 2017-05-26 2018-11-29 John Georges Ladder support system and method
US20200232279A1 (en) * 2016-05-17 2020-07-23 Werner Co. Ladder Leveler and Method
TWI700426B (zh) * 2019-10-16 2020-08-01 國立臺灣海洋大學 用於梯的防傾裝置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2030731T3 (es) 1986-10-02 1992-11-16 Stabilad Limited Estabilizador de escalera.
ES2193068T3 (es) 1999-04-21 2003-11-01 Barrie Weatherall Estabilizador para escaleras de mano.

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES141368A1 (es) * 1936-02-20 1936-06-01 Mueller Juan Martin Un procedimiento de fabricación de un nuevo material para el recubrimiento del piso de las calles y carreteras.
US2381154A (en) * 1944-05-24 1945-08-07 Victor M Fowler Ladder
FR2493393A1 (fr) * 1980-10-30 1982-05-07 Koestner Joseph Echelle coulissante a usages multiples
CA1300578C (fr) * 1987-01-13 1992-05-12 Michael Osborne Stabilisateur d'echelle
ES2011362A6 (es) * 1988-07-20 1990-01-01 Orpi Fabregas Jaime Disposicion perfeccionada aplicable a escaleras de mano.
DE3825299A1 (de) * 1988-07-26 1990-02-01 Loh Kg Hailo Werk Doppelsprossenleiter
US5232067A (en) * 1990-12-13 1993-08-03 Griffith Leon E Stile extending attachment for ladder
CA2118436C (fr) * 1994-10-19 1997-02-18 Francois Charbonneau Stabilisateur d'echelle
US5542497A (en) * 1994-11-14 1996-08-06 Macyszyn; Witold S. Ladder level adjusting attachment
US5853065A (en) * 1997-10-01 1998-12-29 Hutson; Emory R. Adjustable leg ladder assembly
GB2353319A (en) * 1999-07-09 2001-02-21 Francis Dennis Herbison Ladder attachment
US6405829B1 (en) * 2000-01-28 2002-06-18 Triodyne Safety Systems, L.L.C. Anti-slide out devices for straight and extension ladders
US6640931B2 (en) * 2000-02-04 2003-11-04 R. Park Palmer Universal, hand attachable,multi-use, l-shaped, ladder utility bracket, with ladder leveler attachment
GB2360319A (en) * 2000-03-17 2001-09-19 Kevin James Mitchell Ladder stabiliser with threaded height adjustment
AU779533B2 (en) * 2001-01-25 2005-01-27 Andrew Richards Levelling apparatus for a support structure
ES1049035Y (es) * 2001-02-26 2002-03-16 Calvo Francisco Araque Escalera extensible con plataforma de carga.
JP2003013682A (ja) * 2001-07-02 2003-01-15 Taku Yoshizaki 梯子の安定支持具
DE20113948U1 (de) * 2001-08-23 2001-12-06 Mayr, Xaver, 88171 Weiler-Simmerberg Abrutschsicherung für Leitern
FR2840349B1 (fr) * 2002-05-30 2004-09-24 Sklop Ets Pied d'echelle articule
AU2003100707A4 (en) * 2003-10-23 2004-05-13 Stephen Harry Smith Stabilizer arm for a ladder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2030731T3 (es) 1986-10-02 1992-11-16 Stabilad Limited Estabilizador de escalera.
ES2193068T3 (es) 1999-04-21 2003-11-01 Barrie Weatherall Estabilizador para escaleras de mano.

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011104700A3 (fr) * 2010-02-24 2015-07-02 Wesolve Limited Équipement de sécurité pour échelle
WO2012168684A1 (fr) * 2011-06-10 2012-12-13 Garry Mcdonald Dispositif de support et dispositif amélioré permettant d'accéder à des endroits surélevés
WO2013130012A2 (fr) * 2012-03-02 2013-09-06 Yong Foo Sia Échelle de sécurité
WO2013130012A3 (fr) * 2012-03-02 2013-10-24 Yong Foo Sia Échelle de sécurité
US20200232279A1 (en) * 2016-05-17 2020-07-23 Werner Co. Ladder Leveler and Method
US20180340371A1 (en) * 2017-05-26 2018-11-29 John Georges Ladder support system and method
TWI700426B (zh) * 2019-10-16 2020-08-01 國立臺灣海洋大學 用於梯的防傾裝置

Also Published As

Publication number Publication date
ES2297961A1 (es) 2008-05-01
ES2298018A1 (es) 2008-05-01
ES2298018B1 (es) 2009-07-21
EP1657399A3 (fr) 2009-01-21
ES2297961B1 (es) 2009-07-20

Similar Documents

Publication Publication Date Title
US4941547A (en) Safety featured ladder scaffolding
EP1657399A2 (fr) Accessoire de stabilisation d'échelle portable
US9551182B2 (en) Ladder security bracket and safety system
US10370857B2 (en) Adjustable railing
US20170211283A1 (en) Trestle ladder systems and method
JP2020007792A (ja) 簡易足場兼用脚立
US20180258697A1 (en) Safety assembly for ladders
US4295544A (en) Platform stepladder
EP1334256B1 (fr) Support de mise a niveau automatique
US8776948B2 (en) Ladder security bracket and safety system
JP4737475B1 (ja) 梯子アタッチメント
DE19527944C2 (de) Gerüsthalter für Bockleitern oder dergleichen
KR20100055605A (ko) 개량형 조립식 계단
US4091893A (en) Ladder having adjustable leg extensions
KR102080056B1 (ko) 대구경관용 안전 작업대
KR20140046237A (ko) 발판 경사 조절 사다리
KR20110002720U (ko) 고소 작업용 우마 사다리
GB2417280A (en) Adjustable ladder apparatus
PT1365087E (pt) Barreira de segurança
CN219864052U (zh) 一种楼层施工时的施工爬梯结构
EP3957807B1 (fr) Une structure de support d'échafaudage et une méthode d'assemblage d'échafaudages
EP3792447A1 (fr) Unité de support pour une échelle et échelle
JPS6343356Y2 (fr)
GB2271602A (en) Ladder feet
AU2015100413A4 (en) Adjustable access stairway

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

RIC1 Information provided on ipc code assigned before grant

Ipc: E06C 7/44 20060101ALI20081215BHEP

Ipc: E06C 7/42 20060101AFI20060206BHEP

AKX Designation fees paid
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20090501

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566