EP1936108B1 - Stabilising strut for a ladder or scaffolding - Google Patents
Stabilising strut for a ladder or scaffolding Download PDFInfo
- Publication number
- EP1936108B1 EP1936108B1 EP07024363A EP07024363A EP1936108B1 EP 1936108 B1 EP1936108 B1 EP 1936108B1 EP 07024363 A EP07024363 A EP 07024363A EP 07024363 A EP07024363 A EP 07024363A EP 1936108 B1 EP1936108 B1 EP 1936108B1
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- EP
- European Patent Office
- Prior art keywords
- ladder
- stabilising arm
- boom
- arm
- stabilising
- Prior art date
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- 229910052751 metal Inorganic materials 0.000 claims abstract 2
- 239000002184 metal Substances 0.000 claims abstract 2
- 229920003023 plastic Polymers 0.000 claims abstract 2
- 239000004033 plastic Substances 0.000 claims abstract 2
- 239000004411 aluminium Substances 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 5
- 230000005484 gravity Effects 0.000 description 3
- 241001310793 Podium Species 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
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- 239000003381 stabilizer Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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
- E06C7/423—Ladder stabilising struts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/24—Scaffolds primarily resting on the ground comprising essentially special base constructions; comprising essentially special ground-engaging parts, e.g. inclined struts, wheels
-
- 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
- E06C1/20—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles
- E06C1/22—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles with extensible, e.g. telescopic, ladder parts or struts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/24—Scaffolds primarily resting on the ground comprising essentially special base constructions; comprising essentially special ground-engaging parts, e.g. inclined struts, wheels
- E04G2001/248—Inclined struts
Definitions
- the invention relates to a boom for a ladder or scaffolding according to claim 1.
- pivotable boom - in the form of a rod - to arrange.
- the invention relates to according to all the above-mentioned ladders and scaffolding, in which it is possible to pivotally attach a lateral boom rod.
- the boom To move the boom to a working position (spread apart from the ladder or scaffold), the boom must be swung sideways and lengthened to allow a support point on the ground remote from the ladder or scaffolding.
- the boom If the boom is to be pivoted in and brought into a non-active rest position, then it must be pivoted to the ladder or the scaffold and its length shortened.
- each one part of the wire hanger is pivotally mounted on the boom and the opposite part of the wire hanger can be suspended or removed from the ladder.
- the DE 10104689 A1 discloses a ladder stabilizer, wherein a single telescoping boom is hingedly connected to the upper end of a goat ladder, and about the middle of the length of this boom is an axially displaceable sliding sleeve to which one end of a single telescopic boom strut is hinged, the other end thereof at the lower end of the spar the ladder is articulated.
- the US 4641729 A discloses a step ladder, each with a telescopic boom 52 according to the preamble of claim 1, whose upper ends are hinged left and right at the upper ends of the spars of the Bockleiter, each boom 52 via a respective boom strut approximately in the lower quarter of the height of the Bockleiter is hinged on each spar of the Bockleiter.
- the two sleeves 86, 88 are arranged axially displaceable on the arm 52, but this is only done to adjust the sleeves 86, 88, then to the sleeves 86, 88 by axially above and below retaining rings 92 on the boom 52 in her to fix axial position.
- the sleeves 86, 88 are rotatably mounted on the boom 52, but they are not directly and directly connected to each other, but are only loosely on each other, supported by the locking rings 92.
- the folding and unfolding of the boom 52 on and from the ladder struts 34 takes place solely by the axial sliding of the boom struts 54, 58 in the slide bearing 81, 82, but not by axial displacement of the sleeves 86, 88 on the boom 52.
- the sleeves 86, 88 are during the folding or unfolding of the ladder through the locking rings 92nd set on the boom 52 in its axial position, but arranged rotatably there.
- the invention is therefore the object of developing a boom for a ladder, a scaffold or the like so that it provides both a Schwenkwinkelbegrenzung the boom to the outside and inward, which works much more reliable and easier than the known solutions.
- the invention is characterized by the technical teaching of claim 1.
- the pivot limiting for the boom consists in particular two aligned superimposed sliding sleeves, which are penetrated by the boom and which are arranged displaceably on the boom, that in each case a boom strut with one end pivotally connected to the sliding sleeve and with its other end pivotally connected to a ladder part.
- boom struts are now fixed and no longer removable, each attached to a ladder part and are pivotally mounted there.
- the respective sliding sleeve is in the upper third of the boom, and the boom struts are arranged approximately parallel to the longitudinal axis of the ladder struts of the ladder part.
- the boom is pivoted slightly outwards by means of a spring or by manual force.
- the sliding sleeves fall by gravity down and slide along the longitudinal axis down due to gravity on a dead center on the longitudinal axis of the boom.
- the swung-out position can only be reversed by moving with hand force on the boom struts or the sliding sleeves against the previous displacement movement of the sliding sleeves up to move these sliding sleeves back over the dead center on the boom and this while the boom towards its rest position against to move and lay the ladder.
- Such a boom assembly can be attached to any ladder, scaffolding, podium, podium ladder and the like.
- the invention is therefore not limited to the arrangement of a particular ladder or a particular scaffolding.
- the invention provides several embodiments, and for such a change in length, it is important that the boom is pulled out to achieve its working position or extended in length to a support length, with the support length can adapt to the level of the ground.
- the boom At rest, the boom is shortened in length so as not to exceed the outer dimensions of the ladder or ladder parts.
- variable length devices are z.
- clamping devices that can change a telescopic boom in length or spring clamps or wedge clamps orJnabsteckvorraumen, so that the boom rod consists of two telescoping telescoping tube parts, the length adjustment by inserting a stake in two oppositely aligned holes arranged in the one another reaching pipe parts is achieved.
- boom In addition to the change in length due to the intermeshing of telescopic tubes, another embodiment provides for the boom to be designed to be foldable or otherwise variable in length.
- a stepladder 1 which consists of two ladder parts 3, 4, which are pivotally connected to each other at its upper portion by a bearing block 7.
- a pivot bearing 6 for the attachment of the upper end of a boom 5 is shown.
- FIG. 1 only a single boom 5 shown, although in practice always on both sides of a ladder or scaffolding such a boom 5 is arranged.
- the ladder is not only on the two pivotally hinged to each other ladder parts 3, 4, but also on the left and right of the ladder parts 3, 4 splayed out boom fifth
- the invention provides that the boom 5 passes through two sliding sleeves 13, 14, which are thus arranged displaceably and with a corresponding sliding play on the boom 5.
- the sliding sleeves 13, 14 are preferably designed as pipe clamps, to which the invention is not limited. It is important that the profile of the sliding sleeves 13, 14 is adapted to the profile of the boom 5. Accordingly, the boom 5 could for example also consist of an oval profile or another profile, and the profile of the sliding sleeves 13, 14 would then adapted to this profile.
- the sliding sleeves are not only arranged longitudinally displaceable on the boom 5, but also rotatable.
- the profile shape of the sliding sleeves 13, 14 may be adapted to the profile of the boom 5 accordingly.
- FIG. 1 shows the swung working position of the boom brace.
- FIG. 2 shows that the two sliding sleeves 13, 14 in the direction of arrow 19 from a raised rest position to the working position FIG. 1 and 2 were moved automatically and gravitationally, according to FIG. 2 the two sliding sleeves 13, 14 have been moved so far in the direction of arrow 19 in the boom that they have overcome a dead center 20 and create below this dead center on a stop rivet 21.
- Each sliding sleeve 13, 14 is in this case connected to a pivot bearing 17, 18, on which one end of a cantilever strut 11, 12 is pivotally hinged.
- the other end of the respective cantilever strut 11, 12 is pivotally connected to a pivot hook 16, which is bent and with his bent end engages in a arranged on the inside of the respective conductor part 3, 4 hinge plate 15.
- the bend of the swivel hook 16 and its pivotal mounting on both sides - on the boom strut 11, 12 and on the other hand on the hinge plate 15 - has the purpose that in the pivoted state of the boom 5, when this is approximately parallel to the longitudinal axis of the ladder parts 3, 4 directed , the two boom struts 11, 12 are pivoted in front of the ladder parts 3, 4 and therefore create on the outside of the ladder parts 3, 4 and can not get into the space between the ladder parts 3, 4.
- FIG. 3 shows as a preferred embodiment, an automatic or at least partially automatic swinging out of the boom under spring force.
- a biasing spring 8 is arranged, with its one end on the pivot bearing 6 and with its other end 9 on the pivotable Part of the boom 5 supporting load.
- the invention also relates to a solution in which the biasing spring 8 can be omitted. If the biasing spring 8 is omitted, the necessary pivotal movement in the direction of the arrow 25 must be carried out completely by hand.
- the sliding sleeve 13 shifts from its rest position 13 'in the direction of arrow 22 (here, for example clockwise), while the sliding sleeve from its rest position 14' in the position 14 in the direction of arrow 23 (here counterclockwise, for example) twisted, so that the Turning directions of the two sliding sleeves 13, 14 are opposite to each other.
- FIG. 4 shows at the same time that in the rest position, the respective cantilever strut 11 ', 12' is aligned exactly parallel to the longitudinal axis of the conductor parts 3, 4.
- the previously described overcoming the dead center 20 is according to FIG. 1 defined by the angle 24 between the longitudinal axis of the boom strut 11, 12 and the longitudinal axis of the boom 5 is less than 90 degrees to achieve the desired self-locking.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Ladders (AREA)
Abstract
Description
Die Erfindung betrifft einen Ausleger für eine Leiter oder ein Arbeitsgerüst nach dem Patentanspruch 1.The invention relates to a boom for a ladder or scaffolding according to
Zur seitlichen Abstützung von Podestleitern, Stehleitern, Plattformleitern, Bockleitern und beliebigen Arbeitsgerüsten ist es bekannt, an jeweils der Seite der Leiter oder des Arbeitsgerüstes einen verschwenkbaren Ausleger - in der Form eine Stabes - schwenkbar anzuordnen.For the lateral support of platform ladders, ladders, platform ladders, ladders and any scaffolds, it is known to pivot on each of the side of the ladder or scaffold a pivotable boom - in the form of a rod - to arrange.
Die Erfindung betrifft dem gemäß alle vorgenannten Leitern und Arbeitsgerüste, bei denen es möglich ist, einen seitlichen Auslegerstab schwenkbar anzubringen.The invention relates to according to all the above-mentioned ladders and scaffolding, in which it is possible to pivotally attach a lateral boom rod.
Hierbei ist es bekannt, den Ausleger am oberen Ende der Leiter oder des Gerüstes in einem Schwenkgelenk anzuordnen und im Übrigen den Ausleger längenveränderbar auszubilden.It is known to arrange the boom at the upper end of the ladder or the frame in a pivot joint and otherwise form the boom variable in length.
Um den Ausleger in eine Arbeitsposition (abgespreizt von der Leiter oder dem Arbeitsgerüst) zu bringen, muss der Ausleger seitlich ausgeschwenkt werden und in seiner Länge verlängert werden, um eine Abstützungspunkt am Erdboden entfernt von der Leiter oder dem Gerüst zu ermöglichen.To move the boom to a working position (spread apart from the ladder or scaffold), the boom must be swung sideways and lengthened to allow a support point on the ground remote from the ladder or scaffolding.
Soll der Ausleger eingeschwenkt werden und in eine nicht-aktive Ruhelage gebracht werden, dann muss er an die Leiter oder das Gerüst herangeschwenkt werden und hierbei seine Länge verkürzt werden.If the boom is to be pivoted in and brought into a non-active rest position, then it must be pivoted to the ladder or the scaffold and its length shortened.
Zur Halterung des Auslegers an der Leiter oder dem Gerüst ist es ferner bekannt, im Abstand vom Schwenkgelenk eine weitere Halterung oder Abstützung vorzusehen, die vermeidet, dass der ausgestellte Ausleger unbeabsichtigt vom Gerüst oder der Leiter wegschwenkt.To support the boom on the ladder or the scaffold, it is also known to provide a further support or support at a distance from the pivot joint, which avoids that the issued boom unintentionally pivots away from the frame or the ladder.
Für diese Abstützung ist es bekannt, Bänder zu verwenden, wobei ein Band beispielsweise an dem einen Leiterteil und das andere Band an dem anderen Leiterteil ansetzt und die beiden Bänder sich etwa in der Mitte des Auslegers treffen und dort mit diesem verbunden sind. Auf diese Weise wird eine Schwenkwinkelbegrenzung des Auslegers erreicht.For this support, it is known to use bands, with one band, for example, on one conductor part and the other band on the other Ladder part attaches and the two bands meet approximately in the middle of the boom and there are connected to this. In this way, a pivoting angle limit of the boom is achieved.
In einer anderen bekannten Ausführungsform ist es vorgesehen, dass statt der Bänder einhängbare Drahtbügel verwendet werden, wobei jeweils der eine Teil des Drahtbügels schwenkbar an dem Ausleger befestigt ist und der gegenüberliegende Teil des Drahtbügels an der Leiter einhängbar oder wegnehmbar ist.In another known embodiment, it is provided that instead of the bands hook-in wire hanger are used, each one part of the wire hanger is pivotally mounted on the boom and the opposite part of the wire hanger can be suspended or removed from the ladder.
Nachteil der verwendeten Bänder ist jedoch, dass sie biegeschlaff sind. Sie schützen den Ausleger doch nur gegen eine Bewegung, die nach außen gerichtet ist, begrenzen die Stützweite nach außen.Disadvantage of the bands used, however, is that they are limp. They protect the boom but only against a movement that is directed outwards, limit the span to the outside.
Sie schützen jedoch nicht dagegen, dass der Ausleger bei der Arbeit mit der Leiter oder dem Arbeitsgerüst langsam nach innen wandert und die Leiter hierdurch instabil wird. In Extremfällen kann es vorkommen, dass die beiden seitlichen Ausleger die Leiter anheben, wobei die Leiterteile dann nicht mehr alle zugleich im Kontakt mit der Aufstellfläche sind.However, they do not protect against the fact that the boom moves slowly inwards when working with the ladder or scaffold and the ladder becomes unstable. In extreme cases, it may happen that the two side arms lift the ladder, whereby the ladder parts are then not all at the same time in contact with the footprint.
Nachteil der bekannten, einhängbaren Streben, welche sowohl die Stützweite nach innen als nach außen begrenzen, ist jedoch, dass sie getrennt eingehängt werden müssen, was einen zusätzlichen Arbeitsgang erfordert. Bei dieser Art der Befestigung besteht die Gefahr, dass der Benutzer die Einhängung der Drahtbügel nicht vornimmt, wodurch der Ausleger nicht fixiert ist, oder es besteht auch die Gefahr, dass die Drahtbügel unbeabsichtigt aushängen, was die Betriebssicherheit beeinträchtigt.Disadvantage of the known, hinged struts, which limit both the span inwards and outwards, however, is that they must be hung separately, which requires an additional operation. In this type of attachment, there is a risk that the user does not make the hanging of the wire hanger, whereby the boom is not fixed, or there is a risk that the wire hanger unintentionally unhook, which affects the reliability.
Im Übrigen besteht bei dieser bekannten Lösung die Gefahr, dass die in der Ruhelage lose am Ausleger herunterbaumelnden Drahtbügel zu Verletzungen führen, außer sie werden noch in einer besonderen Aufnahmevorrichtung festgehalten. Die Einhängung der Drahtbügel in der Ruhelage im Bereich dieser Aufnahmevorrichtung erfordert jedoch wiederum einen weiteren Arbeitsvorgang.Incidentally, there is a risk in this known solution that loose in the rest position herunterbaumelnden on the boom wire hangers lead to injury, unless they are still held in a special recording device. However, the suspension of the wire bracket in the rest position in the region of this recording device in turn requires another operation.
Die
Die
Der Erfindung liegt deshalb die Aufgabe zugrunde, einen Ausleger für eine Leiter, ein Arbeitsgerüst oder dergleichen so weiterzubilden, dass er sowohl eine Schwenkwinkelbegrenzung des Auslegers nach außen als auch nach innen vorsieht, die wesentlich betriebssicherer und einfacher als die bekannten Lösungen arbeitet.The invention is therefore the object of developing a boom for a ladder, a scaffold or the like so that it provides both a Schwenkwinkelbegrenzung the boom to the outside and inward, which works much more reliable and easier than the known solutions.
Zur Lösung der gestellten Aufgabe ist die Erfindung durch die technische Lehre des Anspruches 1 gekennzeichnet.To solve the problem, the invention is characterized by the technical teaching of
Wesentliches Merkmal der Erfindung ist, dass die Schwenkbegrenzung für den Ausleger aus insbesondere zwei fluchtend übereinander angeordneten Schiebehülsen besteht, die von dem Ausleger durchgriffen sind und die verschiebbar auf dem Ausleger angeordnet sind, dass ferner jeweils eine Auslegerstrebe mit ihrem einen Ende schwenkbar mit der Schiebehülse und mit ihrem anderen Ende schwenkbar mit einem Leiterteil verbunden ist.An essential feature of the invention is that the pivot limiting for the boom consists in particular two aligned superimposed sliding sleeves, which are penetrated by the boom and which are arranged displaceably on the boom, that in each case a boom strut with one end pivotally connected to the sliding sleeve and with its other end pivotally connected to a ladder part.
Mit der gegebenen technischen Lehre ergibt sich nun der wesentliche Vorteil, dass eine feste Auslegerstreben-Anordnung für die Fixierung des Auslegers vorgesehen ist, wie sie in Form von aushängbaren Drahtbügeln bereits schon beim Stand der Technik bekannt war.With the given technical teaching, there is now the significant advantage that a fixed boom strut assembly is provided for the fixation of the boom, as it was already known in the art in the form of aushängbaren wire hangers.
Wesentlicher Unterschied bei der Erfindung ist jedoch, dass diese Auslegerstreben nun fest und nicht mehr abnehmbar jeweils an einem Leiterteil befestigt sind und dort schwenkbar gelagert sind.The main difference in the invention, however, is that these boom struts are now fixed and no longer removable, each attached to a ladder part and are pivotally mounted there.
Ist der Ausleger in seiner Ruhelage und hierbei an das Leiterteil oder das Gerüst herangeklappt, dann befindet sich die jeweilige Schiebehülse im oberen Drittel des Auslegers, und die Auslegerstreben sind etwa parallel zur Längsachse der Leiterholme des Leiterteils angeordnet.If the boom in its rest position and this folded up on the ladder part or the frame, then the respective sliding sleeve is in the upper third of the boom, and the boom struts are arranged approximately parallel to the longitudinal axis of the ladder struts of the ladder part.
Sobald die Leiter aufgeklappt wird, wird mittels einer Feder oder mittels Handkraft der Ausleger geringfügig nach außen verschwenkt. Hierdurch fallen die Schiebehülsen schwerkraftbedingt nach unten und gleiten entlang der Längsachse schwerkraftbedingt über einen Totpunkt auf der Längsachse des Auslegers herunter.As soon as the ladder is opened, the boom is pivoted slightly outwards by means of a spring or by manual force. As a result, the sliding sleeves fall by gravity down and slide along the longitudinal axis down due to gravity on a dead center on the longitudinal axis of the boom.
Damit ist gewährleistet, dass der Ausleger sich nicht mehr bewegen kann, er verharrt deshalb in seiner ausgeschwenkten Lage.This ensures that the boom can no longer move, so it remains in its swung-out position.
Die ausgeschwenkte Lage kann nur dadurch rückgängig gemacht werden, indem mit Handkraft an den Auslegerstreben oder den Schiebehülsen entgegen der vorherigen Verschiebebewegung der Schiebehülsen nach oben verfahren wird, um diese Schiebehülsen wieder über den Totpunkt am Ausleger hinauszubewegen und hierbei gleichzeitig den Ausleger in Richtung seiner Ruhelage gegen die Leiter zu bewegen und anzulegen.The swung-out position can only be reversed by moving with hand force on the boom struts or the sliding sleeves against the previous displacement movement of the sliding sleeves up to move these sliding sleeves back over the dead center on the boom and this while the boom towards its rest position against to move and lay the ladder.
Es handelt sich also um eine selbsthemmende Anordnung von Auslegerstreben, die mit Hilfe von zwei sich gegeneinander bewegbaren Schiebehülsen auf dem Ausleger verschiebbar angelenkt sind.It is therefore a self-locking arrangement of boom struts, which are articulated by means of two mutually movable sliding sleeves on the boom slidably.
Damit ergibt sich der wesentliche Vorteil, dass nun erstmals eine feste Verbindung zwischen einem Ausleger und einer Leiter und einem Arbeitsgerüst gegeben ist, die nicht ausgehängt werden kann, die nicht verloren geht und die den Ausleger sowohl in Richtung seiner Schwenkstellung nach außen als auch in seiner Schwenkstellung nach innen absolut arretiert.This results in the significant advantage that now for the first time a firm connection between a boom and a ladder and a scaffold is given, which can not be unhooked, which is not lost and the boom both in the direction of its pivotal position to the outside and in his Pivoting position absolutely locked inwards.
Eine solche Auslegeranordnung kann an jeder beliebigen Leiter, jedem beliebigen Arbeitsgerüst, jedem Podest, jeder Podestleiter und dergleichen befestigt werden. Die Erfindung ist deshalb nicht auf die Anordnung an einer bestimmten Leiter oder einem bestimmten Arbeitsgerüst beschränkt.Such a boom assembly can be attached to any ladder, scaffolding, podium, podium ladder and the like. The invention is therefore not limited to the arrangement of a particular ladder or a particular scaffolding.
Es wird noch hinzugefügt, dass es bekannt ist, den Ausleger längenveränderbar zu gestalten. Hierbei sieht die Erfindung mehrere Ausführungsformen vor, und für eine derartige Längenveränderung ist es wichtig, dass der Ausleger zur Erreichung seiner Arbeitsstellung ausgezogen wird oder in seiner Länge auf eine Stützlänge verlängert wird, wobei sich die Stützlänge dem Niveau des Untergrundes anpassen kann.It is also added that it is known to make the boom variable in length. Here, the invention provides several embodiments, and for such a change in length, it is important that the boom is pulled out to achieve its working position or extended in length to a support length, with the support length can adapt to the level of the ground.
In der Ruhestellung wird der Ausleger in seiner Länge verkürzt, um ihn nicht über die Außenabmessungen der Leiter oder Leiterteile hinausstehen zu lassen.At rest, the boom is shortened in length so as not to exceed the outer dimensions of the ladder or ladder parts.
Für diese Längenveränderbarkeit gibt es eine Vielzahl von Ausführungsformen, die in Verbindung mit der erfindungsgemäßen Anlenkung des Auslegers an der Leiter beansprucht werden.For this Längenveränderbarkeit there are a variety of embodiments, which are claimed in connection with the invention articulation of the boom on the ladder.
Derartige längenveränderbare Vorrichtungen sind z. B. Klemmvorrichtungen, die einen teleskopierbaren Ausleger in der Länge verändern können oder Federklemmmechanismen oder Keilklemmvorrichtungen oder auch Längenabsteckvorrichtungen, so dass der Auslegerstab aus zwei ineinander verschiebbaren teleskopierbaren Rohrteilen besteht, wobei die Längeneinstellung durch das Einstecken eines Absteckelementes in zwei gegenüberliegend fluchtend angeordneten Bohrungen von den ineinander greifenden Rohrteilen erreicht wird.Such variable length devices are z. As clamping devices that can change a telescopic boom in length or spring clamps or wedge clamps or Längenabsteckvorrichtungen, so that the boom rod consists of two telescoping telescoping tube parts, the length adjustment by inserting a stake in two oppositely aligned holes arranged in the one another reaching pipe parts is achieved.
Neben der Längenveränderung durch das Ineinandergreifen von teleskopierbaren Rohren ist in einer anderen Ausführungsform vorgesehen, den Ausleger auch klappbar oder in anderer Weise längenveränderbar zu gestalten.In addition to the change in length due to the intermeshing of telescopic tubes, another embodiment provides for the boom to be designed to be foldable or otherwise variable in length.
Der Erfindungsgegenstand der vorliegenden Erfindung ergibt sich aus dem vorliegenden Anspruchssatz..The subject of the present invention results from the present set of claims.
Im Folgenden wird die Erfindung anhand von lediglich einen Ausführungsweg darstellenden Zeichnungen näher erläutert. Hierbei gehen aus den Zeichnungen und ihrer Beschreibung weitere erfindungswesentliche Merkmale und Vorteile der Erfindung hervor.In the following the invention will be explained in more detail with reference to drawings showing only one embodiment. Here are from the drawings and their description further features essential to the invention and advantages of the invention.
Es zeigen:
- Figur 1:
- ausschnittweise, perspektivische Darstellung einer Plattformleiter mit dem erfindungsgemäßen Ausleger in ausgeschwenktem Zustand
- Figur 2:
- eine vergrößerte Darstellung wie in
Figur 1 - Figur 3:
- eine vergrößerte Darstellung der Anlenkung des Auslegers an dem oberen Leiternteil
- Figur 4:
- die Ruhestellung der Schiebehülsen der Auslegerstreben, wenn der Ausleger an die Leiter angeschwenkt ist
- FIG. 1:
- partial, perspective view of a platform ladder with the boom according to the invention in swung out state
- FIG. 2:
- an enlarged view as in
FIG. 1 - FIG. 3:
- an enlarged view of the articulation of the boom on the upper ladder part
- FIG. 4:
- the rest position of the sliding sleeves of the boom struts when the boom is pivoted to the ladder
Im gezeigten Ausführungsbeispiel wird eine Stehleiter 1 dargestellt, die aus zwei Leiterteilen 3, 4 besteht, die an ihrem oberen Bereich durch einen Lagerbock 7 schwenkbar miteinander verbunden sind.
Im Bereich des Lagerbockes 7 ist hierbei ein Schwenklager 6 für die Befestigung des oberen Endes eines Auslegers 5 dargestellt.In the embodiment shown, a
In the region of the
Aus zeichnerischen Gründen ist in der
Somit steht die Leiter nicht nur auf den beiden schwenkbar zueinander angelenkten Leiterteilen 3, 4, sondern auch noch auf den links und rechts von den Leiterteilen 3, 4 abgespreizten Auslegern 5.Thus, the ladder is not only on the two pivotally hinged to each
Jeder Ausleger ist längenveränderbar. Dies wurde in der allgemeinen Beschreibung vorstehend erläutert.Each boom is variable in length. This has been explained in the general description above.
Um nun den Ausleger von einer eingeschwenkten Ruhelage in eine ausgeschwenkte Arbeitslage zu bringen, ist erfindungsgemäß vorgesehen, dass der Ausleger 5 zwei Schiebehülsen 13, 14 durchgreift, die somit verschiebbar und mit entsprechendem Schiebespiel auf dem Ausleger 5 angeordnet sind.In order to bring the boom from a pivoted rest position into a swung-out working position, the invention provides that the
Selbstverständlich ist zur Lösung der Erfindung nicht notwendig, Schiebehülsen als rundumlaufende, den Ausleger 5 umgreifende Hülsen zu verwenden. Es kann auch vorgesehen werden, dass die Schiebehülsen nur etwa Dreiviertel des Umfang des Auslegers umgreifen oder jedenfalls mehr als die Hälfte.Of course, to solve the invention is not necessary to use sliding sleeves as all-round, the
Die Schiebehülsen 13, 14 sind bevorzugt als Rohrschellen ausgebildet, worauf die Erfindung jedoch nicht beschränkt ist. Wichtig ist, dass das Profil der Schiebehülsen 13, 14 dem Profil des Auslegers 5 angepasst ist. Dementsprechend könnte der Ausleger 5 beispielsweise auch aus einem Ovalprofil oder einem anderen Profil bestehen, und das Profil der Schiebehülsen 13, 14 wäre dann diesem Profil angepasst.The sliding
Voraussetzung für diese Formgebung ist allerdings, dass die Schiebehülsen nicht nur längs verschiebbar auf dem Ausleger 5 angeordnet sind, sondern auch verdrehbar. Zu diesem Zweck kann die Profilform der Schiebehülsen 13, 14 dem Profil des Auslegers 5 entsprechend angepasst sein.However, a prerequisite for this shaping is that the sliding sleeves are not only arranged longitudinally displaceable on the
Die
Jede Schiebehülse 13, 14 ist hierbei mit einem Schwenklager 17, 18 verbunden, an dem schwenkbar das eine Ende jeweils einer Auslegerstrebe 11, 12 angelenkt ist.Each sliding
Das andere Ende der jeweiligen Auslegerstrebe 11, 12 ist hierbei schwenkbar mit einem Schwenkhaken 16 verbunden, der abgekröpft ist und mit seinem abgekröpften Ende in einem an der Innenseite des jeweiligen Leiterteils 3, 4 angeordneten Scharnierplatte 15 eingreift.The other end of the
Die Abkröpfung des Schwenkhakens 16 und dessen beidseitige schwenkbare Lagerung - einerseits an der Auslegerstrebe 11, 12 und andererseits an der Scharnierplatte 15 - hat den Zweck, dass im eingeschwenkten Zustand des Auslegers 5, wenn dieser etwa parallel zur Längsachse der Leiterteile 3, 4 gerichtet ist, die beiden Auslegerstreben 11, 12 vor die Leiterteile 3, 4 verschwenkt werden und deshalb an der Außenseite der Leiterteile 3, 4 anlegen und nicht in den Zwischenraum zwischen die Leiterteile 3, 4 gelangen können.The bend of the
Damit ist gewährleistet, dass die beiden Leiterteile 3, 4 komplett geschlossen werden können, ohne dass sich die Auslegerstreben 11, 12 in diesen Zwischenraum hineindrängen.This ensures that the two
Es handelt sich somit um eine Zwangsführung der Auslegerstreben 11, 12 in ihrem Anlenkpunkt an den Leiterteilen 3, 4.
Die
The
Zu diesem Zweck ist vorgesehen, dass im Bereich des Schwenklagers 6 - welches am Lagerbock 7 der Leiterteile 3, 4 angelenkt ist - eine Vorspannfeder 8 angeordnet ist, die mit ihrem einen Ende am Schwenklager 6 und die sich mit ihrem anderen Ende 9 an dem schwenkbaren Teil des Auslegers 5 lastübertragend abstützt.For this purpose, it is provided that in the region of the pivot bearing 6 - which is hinged to the
Es handelt sich um eine selbsttätige Ausschwenkung des Auslegers 5. Im Ruhezustand sind die beiden Ausleger mit einem Band oder einer anderen Feststellvorrichtung an den Leiterteilen 3, 4 fixiert. Sobald dieses Band oder die Feststellvorrichtung gelöst wurde, wirkt das freie Federende 9 der Vorspannfeder 8 auf den schwenkbaren Teil des Auslegers 5, der somit in Pfeilrichtung 25 nach außen verschwenkt wird.It is an automatic swinging out of the
Aufgrund dieser Schwenkbewegung fallen die beiden Schiebehülsen 13, 14 - wie dies bezüglich der Schiebehülsen 13' und 14' in
Die Erfindung betrifft selbstverständlich auch eine Lösung, bei der die Vorspannfeder 8 entfallen kann. Entfällt die Vorspannfeder 8, muss die notwendige Schwenkbewegung in Pfeilrichtung 25 vollständig von Hand durchgeführt werden.Of course, the invention also relates to a solution in which the
Es wird noch angefügt, dass der Ausleger 5 in der Schwenkachse 10 am Schwenklager 6 schwenkbar gehalten ist.It is also added that the
Beim Verschieben der Schiebehülsen 13, 14 in Pfeilrichtung 19 verdrehen diese sich gleichzeitig auf dem Ausleger 5, was in
Die Schiebehülse 13 verschiebt sich aus ihrer Ruhelage 13' in der Pfeilrichtung 22 (hier z.B. im Uhrzeigersinn), während sich die Schiebehülse aus ihrer Ruhelage 14' in die Lage 14 in Pfeilrichtung 23 (hier z.B. im Gegen-Uhrzeigersinn) verdreht, so dass die Drehrichtungen der beiden Schiebehülsen 13, 14 zueinander gegenläufig sind. Die Verbindung der Schiebehülsen 13, 14 erfolgt über eine Schnapp-Rast-Verbindung.The sliding
Die
Die vorher beschriebene Überwindung des Totpunktes 20 wird gemäß
In dieser Stellung ist es nicht mehr möglich, durch Angreifen an dem Ausleger oder der Leiter diesen aus seiner ausgeschwenkten Arbeitslage herauszubringen.In this position, it is no longer possible to bring out by attacking the boom or the ladder from its swung working position.
Selbst beim seitlichen Bewegen der Leiter, bei dem ein Ausleger von der Aufstellfläche abhebt, führt dies nicht dazu, dass dieser seine Arbeitsstellung verlässt. Er bleibt immer in der ausgeschwenkten Arbeitsstellung erhalten. Dies führt deshalb nicht zu einem unerwünschten Wandern des Aufstellpunktes des Auslegers in Richtung auf die Leiter, wodurch die Leiter hochgehoben wird.Even moving the ladder sideways, with a boom lifting off the footprint, will not cause it to leave its working position. He always stays in the swung-out position. Therefore, this does not lead to an undesirable migration of the erection point of the boom in the direction of the ladder, whereby the ladder is lifted.
Mit der Erfindung besteht der Vorteil, dass die Auslegerstreben nun praktisch unlösbar mit den Leiterteilen 3, 4 verbunden sind und es keiner getrennten Bedienung der Auslegerstreben 11, 12 bedarf. Ebenso erfolgt ein selbsttätiges Ausschwenken des Auslegers von der eingeklappten Ruhestellung in die Arbeitsstellung, die federkraftunterstützt ist.With the invention, there is the advantage that the boom struts are now virtually inextricably linked to the
Dies führt zu einer ausgesprochen komfortablen Bedienung einer Leiter oder eines Gerüstes mit seitlich daran befestigten Auslegern 5. Es können deshalb keine Bedienungsfehler mehr bei der Bedienung der Ausleger vorkommen.This leads to a very comfortable operation of a ladder or a scaffold with jibs attached laterally thereto. Therefore, there can be no operating errors in the operation of the boom.
- 11
- Stehleiterstepladder
- 22
- Plattformplatform
- 33
- Leiterteilladder section
- 44
- Leiterteilladder section
- 55
- Auslegerboom
- 66
- Schwenklagerpivot bearing
- 77
- Lagerbock (für Leiterteile)Bearing block (for ladder parts)
- 88th
- Vorspannfederbiasing spring
- 99
- EndeThe End
- 1010
- Schwenkachseswivel axis
- 1111
- Auslegerstrebeboom strut
- 1212
- Auslegerstrebeboom strut
- 1313
- Schiebehülsesliding sleeve
- 1414
- Schiebehülsesliding sleeve
- 1515
- Scharnierplattehinge plate
- 1616
- Schwenkhakenswivel hook
- 1717
- Schwenklagerpivot bearing
- 1818
- Schwenklagerpivot bearing
- 1919
- Pfeilrichtungarrow
- 2020
- Totpunktdead
- 2121
- AnschlagnietAnschlagniet
- 2222
- Pfeilrichtungarrow
- 2323
- Pfeilrichtungarrow
- 2424
- Winkel < 90°Angle <90 °
- 2525
- Pfeilrichtungarrow
Claims (10)
- Stabilising arm (5) for a ladder (1) or a work scaffold or the like, which can be articulated thereon by an upper pivot joint (6, 10) and can be pivoted away for the lateral support of the ladder (1) to the side thereof, wherein the stabilising arm can be connected below the pivot joint (6, 10) by the respective ends (3) of pivoting arm struts (11, 12) to the ladder (1), the other ends of which are in each case connected to the stabilising arm (5), the stabilising arm struts (11, 12) being pivotably articulated both to the ladder (1) and also pivotably articulated to a sliding sleeve (13, 14), and the sliding sleeve (13, 14) having the stabilising arm (5) engaging through it and being axially displaceably guided thereon, and at least two sliding sleeves (13, 14), which are arranged aligned one above the other on the stabilising arm (5) and are axially displaceable thereon, being provided, said sliding sleeves being connected, in each case, in an articulated manner to one of these stabilising arm struts (11, 12) and the two sliding sleeves (13, 14) being connected to one another so as to be rotatable with respect to one another, characterised in that the two sliding sleeves (13, 14) are connected by a snap-on/latching connection.
- Stabilising arm (5) according to claim 1, characterised in that in the operating state with stabilising arms (5) folded out laterally from the ladder (1), the sliding sleeves (13, 14) are located below a dead centre (20) self-locking the axial displaceability of the sliding sleeves (13, 14), the dead centre (20) being defined in that the angle (24) between the longitudinal axis of the stabilising arm struts (11, 12) and the longitudinal axis of the stabilising arm (5) is less than 90 degrees in order to achieve the self-locking.
- Stabilising arm (5) according to claim 2, characterised in that the two sliding sleeves (13, 14) rest below the dead centre on a stop rivet (21) of the stabilising arm (5) when the stabilising arm (5) is in the pivoted-out working position.
- Stabilising arm (5) according to any one of claims 1 to 3, characterised in that the snap-on/latching connection of the at least two sliding sleeves (13, 14) is a peripheral tongue and groove connection on the casing side.
- Stabilising arm (5) according to any one of claims 1 to 4, characterised in that the stabilising arm struts (11, 12) can be rigidly and non-removably fastened to the ladder (1).
- Stabilising arm (5) according to any one of claims 1 to 5, characterised in that the stabilising arm (5) is of adjustable length.
- Stabilising arm (5) according to any one of claims 1 to 6, characterised in that the ability of the stabilising arm (5) to pivot away from the ladder (1) is effected at least at the beginning by means of a prestressed spring (8).
- Stabilising arm (5) according to any one of claims 1 to 7, characterised in that the pivot joint (6, 10) has a pivot bearing (6), which can be fastened to a bearing block (7), which can form the articulated connection between two ladder parts (3, 4), which can be adjusted relative to one another, of the ladder (1) configured as a step ladder.
- Stabilising arm (5) according to any one of claims 1 to 8, characterised in that the articulating ability of the stabilising arm struts (11, 12) is effected at a side rail of the ladder (1).
- Stabilising arm (5) according to any one of claims 1 to 9, characterised in that the material of the sliding sleeves (13, 14) is made of plastics material and the material of the stabilising arm (5) is made of metal, in particular aluminium.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006060730A DE102006060730B4 (en) | 2006-12-21 | 2006-12-21 | Boom for a ladder or work scaffold |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1936108A2 EP1936108A2 (en) | 2008-06-25 |
EP1936108A3 EP1936108A3 (en) | 2010-01-06 |
EP1936108B1 true EP1936108B1 (en) | 2011-08-17 |
Family
ID=39106291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07024363A Active EP1936108B1 (en) | 2006-12-21 | 2007-12-15 | Stabilising strut for a ladder or scaffolding |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1936108B1 (en) |
AT (1) | ATE520856T1 (en) |
DE (1) | DE102006060730B4 (en) |
ES (1) | ES2371667T3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201701152D0 (en) * | 2017-01-24 | 2017-03-08 | Binks John Vincent | Improvements in step ladder stabilisers |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2997127A (en) * | 1959-10-07 | 1961-08-22 | Wojtowicz Michael | Stepladder with improved stabilizing legs |
US3327810A (en) * | 1966-05-10 | 1967-06-27 | Up Right Inc | Self-supported ladder |
US4641729A (en) * | 1985-10-31 | 1987-02-10 | Beck Andrew C | Method and apparatus for stabilizing a ladder |
US5511632A (en) * | 1994-07-25 | 1996-04-30 | Ermis; Jerry J. | Ladder with auxiliary support |
DE29821356U1 (en) * | 1998-11-30 | 1999-03-04 | Laug, Horst, 49809 Lingen | Stabilizing supports for fixed and single ladders |
DE10104689C2 (en) | 2001-01-29 | 2002-11-07 | Horst Laug | Stabilization support for ladders |
-
2006
- 2006-12-21 DE DE102006060730A patent/DE102006060730B4/en not_active Expired - Fee Related
-
2007
- 2007-12-15 AT AT07024363T patent/ATE520856T1/en active
- 2007-12-15 EP EP07024363A patent/EP1936108B1/en active Active
- 2007-12-15 ES ES07024363T patent/ES2371667T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
ATE520856T1 (en) | 2011-09-15 |
EP1936108A3 (en) | 2010-01-06 |
DE102006060730B4 (en) | 2009-09-24 |
ES2371667T3 (en) | 2012-01-09 |
EP1936108A2 (en) | 2008-06-25 |
DE102006060730A1 (en) | 2008-07-03 |
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