EP3524769B1 - Ladder with a traverse - Google Patents

Ladder with a traverse Download PDF

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Publication number
EP3524769B1
EP3524769B1 EP18155714.1A EP18155714A EP3524769B1 EP 3524769 B1 EP3524769 B1 EP 3524769B1 EP 18155714 A EP18155714 A EP 18155714A EP 3524769 B1 EP3524769 B1 EP 3524769B1
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EP
European Patent Office
Prior art keywords
ladder
crossbar
support part
guide
ladder according
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.)
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EP18155714.1A
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German (de)
French (fr)
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EP3524769A1 (en
Inventor
Gerd Weinhold
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Hailo Werk Rudolf Loh GmbH and Co KG
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Hailo Werk Rudolf Loh GmbH and Co KG
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Publication of EP3524769A1 publication Critical patent/EP3524769A1/en
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    • 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
    • E06C1/18—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders
    • 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
    • E06C7/42—Ladder feet; Supports therefor
    • 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 present invention relates to a ladder with a riser that has two stiles and rungs or steps arranged between the stiles, and with a first straight cross member, a guide being provided at a lower end of the riser in which the first cross member is in its Is arranged displaceably in the longitudinal direction.
  • Trusses are used with erecting ladders but also with leaning ladders.
  • the function of the traverses is to ensure that the ladders stand securely. Due to the larger contact area, the ladder cannot tip over as quickly as the same ladder without a cross-beam.
  • a disadvantage of the traverses is that, due to the ends of the traverses protruding over the stiles, a ladder with a traverse can be positioned more poorly than a ladder without a traverse, especially in confined spaces. For example, because of the crossbeam, it is not possible to set up a ladder with a crossbeam parallel to a wall without the ladder being removed from the wall by the length of the part of the crossbeam that protrudes over the stiles.
  • Movable traverses have therefore already been developed in the past. These can be moved in their longitudinal direction so that the traverse does not interfere when the ladder is set up parallel to a wall. Already in the document DE 20 2007 001 250 U1 describes a sliding traverse.
  • a disadvantage of the known solutions is that the traverses cannot be moved easily.
  • the easiest way to move the traverse in its longitudinal direction is when the ladder is not yet set up. Once the ladder has been set up, you often have to hold the crossbeam with one hand and then move the riser or support part with the other hand. It's not just inconvenient.
  • the traverses often tilt in the guides provided for them, so that they cannot be moved in the erected state. In order to be able to move the traverse in its longitudinal direction, the ladder must be lifted or then placed on its side so that the traverse is relieved and can be moved by hand. Then it is often easier to move the crossbeam.
  • ladders differ, as for example from the documents FR 2 621 952 A1 and WO 85/03103 A1 are known. These ladders each have an arcuate base on which or on which the lower ends of the ladder stiles rest. The lower ends of the ladder stiles can be moved on this arched base, so that a ladder can be aligned vertically on a sloping surface.
  • the invention was based on the object of improving a ladder with a traverse in such a way that the traverse can easily be displaced in its longitudinal direction.
  • this object is achieved in that the guide has at least one rotatable roller.
  • the traverse can rest on the rotatable roller of the guide. If the traverse is to be moved in its longitudinal direction, the traverse rolls on the roller without any particular effort being required to move it.
  • the weight of the crossbeam is sufficient to ensure that the crossbeam can be moved in its longitudinal direction when the ladder is raised and inclined, without having to put a hand on the crossbeam.
  • the weight of the traverse alone can be sufficient for the traverse to roll on the roller of the guide in the direction in which the traverse is inclined.
  • a ladder according to the invention can have a support part in addition to the riser part.
  • a ladder according to the invention can thus not only be a leaning ladder, but also an erecting ladder.
  • the support part can have two spars and rungs or steps arranged between the spars.
  • the support part can optionally have a second, straight cross member, a guide being provided at a lower end of the support part in which the second cross member can be arranged displaceably in its longitudinal direction, the guide preferably likewise having at least one rotatable roller.
  • the at least one role of the guide can be arranged on an underside of the first and / or second cross member. It is possible for rollers to be attached both on the underside and on the upper side of the first and / or second cross member. If a roller is only attached to the underside of the traverse, the traverse rests on this roller when the ladder is lifted and can then roll easily on the roller. If no roller is attached to the top, this has the advantage that when a ladder is resting on the floor, the cross-member, which is then pushed upwards, does not rest on a roller. This makes it more difficult for a ladder resting on the floor to unroll and thus move the crossbeam. This can be desirable to prevent accidental displacement of the crossbeam, especially when a person is standing on the ladder.
  • the first and / or second traverse is at least when the ladder is up advantageously with an upper side on a part on the guide that is fixed in comparison to the at least one roller.
  • the first and / or second cross member of a ladder according to the invention can have an elongated hole which extends in a longitudinal direction of the first or second cross member.
  • the at least one role can reach through the elongated hole. If the ladder is upright but the crossbeam is raised, the crossbeam is not loaded. It can then rest on the roll with an upper wall of the elongated hole and roll off. In an erect state of the ladder and the loaded state of the traverse, the traverse then rests against a lower wall of the elongated hole.
  • the riser part and / or the support part can then be displaced on the cross member in the direction of the first and / or second cross member in their longitudinal direction. In such a case, in particular, it makes sense to locate the climbing part and / or the supporting part in relation to the first and / or second cross member so that the climbing part and / or the supporting part do not move when climbing the ladder.
  • the ladder can have at least one locking means with which the first and / or second cross member can be locked relative to the riser.
  • the locking means of a ladder according to the invention can comprise screws which are arranged transversely to the first and / or second cross member. It is possible for the locking means to comprise an eccentric lever which is attached to one of the bars and which clamps the cross member in a first position and releases the cross member in a second position.
  • the roller guided through the elongated hole can be arranged on a screw which is inserted through the spar and the elongated hole in the first and / or second cross member.
  • the end of the screw can be screwed into a nut, in particular a star nut. By tightening the nut, the first and / or second traverse can be clamped in the spar.
  • An opening can be provided in the lower end of each spar of the riser part and / or support part, the openings in the lower ends of the bars of the riser part or of the support part being aligned.
  • the traverses can be displaced through the openings.
  • Guide elements which form part of the guide, in particular a part that is fixed in comparison to the rollers, can be inserted into the lower ends of the spars.
  • the guide elements can have openings which are aligned with the openings in the spars and through which the first and second crossbars are guided.
  • An axis extending transversely to the opening can be provided in each of the openings in the guide elements, one of the rollers being mounted on each axis.
  • the roles can be sleeves.
  • the stepladder according to the invention has a riser part 1 and a support part 2 which are pivotably connected to one another.
  • the riser part 1 and the support part 2 each have two spars 10, 20, at the lower ends of which cross members 14, 24 are attached. At the lower ends of the traverse 14, 24 feet 15, 25 are attached with which the stepladder can stand on a surface
  • the bars 10 of the riser part 1 are connected to one another by steps 11 which are attached to the bars 10.
  • the spars 10 of the riser part 1 are connected to one another by a first platform part 12 and an upper cross member 13.
  • the first platform part 12 is fastened above a topmost step 11.
  • the distance to the uppermost step 11 is as great as the distance between the steps 11 of the riser part 1.
  • the spars 10 protrude beyond the first platform part 12.
  • the upper cross member 13 is attached to the upper ends of the spars 10 of the riser part 1.
  • the upper traverse 13 is designed as a storage tray and is, in contrast to what is common with step ladders It is customary, viewed in a plan view of the stepladder, to be U-shaped, which will be explained later.
  • Struts 16 which are provided between the first platform part 12 and the spars 10 or between the second lowest step 11 and the spars 10, give the riser part 1 additional stability.
  • the struts can be omitted if necessary.
  • the bars 20 of the support part 2 are connected to one another by a cross member 23 in a lower region of the support part 2 and by steps 21 and a second platform part 23 in the upper region of the support part 2.
  • the second platform part 23 is provided at the upper end of the support part 2.
  • the spars 20 do not protrude beyond the second platform part 23.
  • the two steps 21 of the support part have a distance from one another which corresponds to the distance between the steps 11 of the riser part 1 from one another.
  • the distance between the top step 21 of the support part 2 and the second platform part 22 is just as great as the distance between the top step 11 of the support part 1 and the first platform part 12.
  • the cross member 23 is provided, which is formed by a tube.
  • the first platform part 12 and the second platform part 22 are connected to one another by hinges (not shown).
  • the pivot connection between the riser part 1 and the support part 2 is established via these hinges.
  • Wire brackets 41, 42 are provided under the platform 12, 22, which prevent an unintentional collapse of an erected ladder impede.
  • the design of the wire brackets 41, 42 and their function are known per se, for example from a folding step which is sold by the applicant under the name "Hailo L90 Step-ke".
  • Ropes 3 which are fastened with one end to a stile 10 of the riser part 1 and with another end to a stile 20 of the support part 2, limit the angle between the riser part 1 and the support part 2 of the erected stepladder according to the invention.
  • the ropes 3 can be omitted if their function is taken over by the wire brackets.
  • a stepladder according to the invention and not only the stepladder according to the invention shown can in principle be used like a conventional stepladder.
  • a user can climb the erected ladder on the climbing side and load the steps of the climbing part.
  • the spars 10 of the support part, which are extended over the platform 12, 22, and the upper cross member 13 give the user the opportunity to hold on, put something down or hang it up and give the user a conventional sense of security even without holding on Trestle ladder not conveyed
  • the user Set up with legs apart, the user has a secure stance and loads the riser part 1 and the support part 2 evenly.
  • stepladder like a stepladder is not only possible because of the additional steps on the support part. It is also facilitated by the fact that the traverse 13 is angled in a U-shape at the upper ends of the spars 10 of the ascending part 1 when viewed from above or is bent in a comparable manner. Only then is it possible in a convenient way to position the upper body upright and centrally over the platform 12, 22 while a foot is moved on one of the steps 21 of the support part.
  • the bars 10 of the riser part 1 and the bars 20 of the support part 2 are made from rectangular tubes.
  • the lower ends of the bars 10 of the riser part 1 and the bars 20 of the support part 2 have openings.
  • guide elements 3 are inserted into the lower ends of the spars 10, 20. These can be plastic injection molded parts.
  • the guide elements 3 also have openings that are in alignment with the openings in the lower ends of the bars 10, 20.
  • the traverses 14, 24 are pushed through the openings.
  • an axis 4 is provided in each of the openings of the guide elements 3, which axis extends transversely to the opening and transversely to the traverse 14, 24.
  • a sleeve 5 is provided which forms a roller 5 mounted on the axle 4.
  • the axes 4 are each formed by a tubular rivet which is inserted through through holes in the side walls of the openings in the guide elements and in the lower ends of the spars 10, 20 and fixed by widening their ends.
  • the star grip screws 7 are loosened so that the clamping of the crossbars 14, 24 is released. If the ladder is then raised, the cross members 14, 24 are lowered within the openings in the guide elements 3. The gap between the rollers 5 and the crossbars 14, 24 disappears and the crossbars 14, 24 come to rest on the rollers 5. A gap then arises between the top of the cross members 14, 24.
  • the traverses 14, 24 then rest on the rollers 5 and by a slight inclination of the ladder 1, the traverses 14, 24 can roll on the rollers 5, whereby the traverses 14, 24 move without the need for additional hands.
  • Screws 8 which are screwed into the crossbars 14, 24, limit the distance by which the crossbars 14, 24 can be moved.

Description

Die vorliegende Erfindung betrifft eine Leiter mit einem Steigteil, das zwei Holme und zwischen den Holmen angeordnete Sprossen oder Stufen aufweist, und mit einer ersten, geraden Traverse, wobei an einem unteren Ende des Steigteils eine Führung vorgesehen ist, in der die erste Traverse in ihrer Längsrichtung verschiebbar angeordnet ist.The present invention relates to a ladder with a riser that has two stiles and rungs or steps arranged between the stiles, and with a first straight cross member, a guide being provided at a lower end of the riser in which the first cross member is in its Is arranged displaceably in the longitudinal direction.

Leitern mit Traversen an einem unteren Ende des Steigteils sind weit verbreitet. Traversen sind bei Aufstellleitern aber auch bei Anlegeleitern im Gebrauch.Ladders with trusses at a lower end of the riser are widespread. Trusses are used with erecting ladders but also with leaning ladders.

Die Traversen haben die Funktion, für einen sicheren Stand der Leitern zu sorgen. Durch die größere Aufstandsfläche kann die Leiter nicht so schnell umkippen, wie eine gleiche Leiter ohne Traverse. Ein Nachteil der Traversen ist allerdings, dass aufgrund der über die Holme auskragenden Enden der Traversen eine Leiter mit Traverse insbesondere bei beengten Raumverhältnissen schlechter positioniert werden kann als eine Leiter ohne Traverse. So ist es beispielsweise wegen der Traverse nicht möglich, eine Leiter mit einer Traverse parallel zu einer Wand aufzustellen, ohne dass die Leiter dabei um die Länge des über die Holme auskragenden Teils der Traverse von der Wand entfernt ist.The function of the traverses is to ensure that the ladders stand securely. Due to the larger contact area, the ladder cannot tip over as quickly as the same ladder without a cross-beam. A disadvantage of the traverses, however, is that, due to the ends of the traverses protruding over the stiles, a ladder with a traverse can be positioned more poorly than a ladder without a traverse, especially in confined spaces. For example, because of the crossbeam, it is not possible to set up a ladder with a crossbeam parallel to a wall without the ladder being removed from the wall by the length of the part of the crossbeam that protrudes over the stiles.

Schon in der Vergangenheit sind daher verschiebbare Traversen entwickelt worden. Diese können in ihrer Längsrichtung verschoben werden, so dass die Traverse beim Aufstellen der Leiter parallel zu einer Wand nicht stört. Bereits in dem Dokument DE 20 2007 001 250 U1 wird eine verschiebbare Traverse beschrieben.Movable traverses have therefore already been developed in the past. These can be moved in their longitudinal direction so that the traverse does not interfere when the ladder is set up parallel to a wall. Already in the document DE 20 2007 001 250 U1 describes a sliding traverse.

Ein Nachteil der bekannten Lösungen ist, dass die Traversen nicht ohne weiteres verschoben werden können. Am einfachsten gelingt das Verschieben der Traverse in ihrer Längsrichtung, wenn die Leiter noch nicht aufgestellt ist. Ist die Leiter aufgestellt, muss man häufig mit der einen Hand die Traverse festhalten und dann mit der anderen Hand das Steigteil oder Stützteil verschieben. Das ist nicht nur unbequem. Oft verkanten die Traversen in den für sie vorgesehenen Führungen, so dass ein Verschieben im aufgestellten Zustand nicht möglich ist. Um dann die Traverse doch in ihrer Längsrichtung verschieben zu können, muss die Leiter angehoben oder dann auf die Seite gelegt werden, so dass die Traverse entlastet ist und mit der Hand verschoben werden kann. Dann ist häufig ein Verschieben der Traverse leichter möglich.A disadvantage of the known solutions is that the traverses cannot be moved easily. The easiest way to move the traverse in its longitudinal direction is when the ladder is not yet set up. Once the ladder has been set up, you often have to hold the crossbeam with one hand and then move the riser or support part with the other hand. It's not just inconvenient. The traverses often tilt in the guides provided for them, so that they cannot be moved in the erected state. In order to be able to move the traverse in its longitudinal direction, the ladder must be lifted or then placed on its side so that the traverse is relieved and can be moved by hand. Then it is often easier to move the crossbeam.

Von Leitern mit in ihrer Längsrichtung verschiebbaren Traversen, wie sie aus dem Dokument DE 20 2007 001 250 U1 bekannt sind, unterscheiden sich Leitern, wie sie zum Beispiel aus den Dokumenten FR 2 621 952 A1 und WO 85/03103 A1 bekannt sind. Diese Leitern weisen je eine bogenförmige Basis auf, auf denen oder an denen die unteren Enden der Leiterholme ruhen. Die unteren Enden der Leiterholme können auf dieser bogenförmigen Basis verschoben werden, wodurch eine Leiter auf einem schrägen Untergrund senkrecht ausgerichtet werden kann.From ladders with traverses that can be moved in their longitudinal direction, as they are from the document DE 20 2007 001 250 U1 are known, ladders differ, as for example from the documents FR 2 621 952 A1 and WO 85/03103 A1 are known. These ladders each have an arcuate base on which or on which the lower ends of the ladder stiles rest. The lower ends of the ladder stiles can be moved on this arched base, so that a ladder can be aligned vertically on a sloping surface.

Ausgehend von diesem Nachteil lag der Erfindung die Aufgabe zu Grunde, eine Leiter mit einer Traverse so zu verbessern, dass die Traverse leicht in ihrer Längsrichtung verschoben werden kann.Proceeding from this disadvantage, the invention was based on the object of improving a ladder with a traverse in such a way that the traverse can easily be displaced in its longitudinal direction.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Führung wenigsten eine drehbare Rolle aufweist.According to the invention, this object is achieved in that the guide has at least one rotatable roller.

Die Traverse kann an der drehbaren Rolle der Führung anliegen. Wenn die Traverse in ihrer Längsrichtung verschoben werden soll, rollt die Traverse auf der Rolle ab, ohne dass zum Verschieben ein besonderer Kraftaufwand notwendig ist. Vorzugsweise kann schon das Gewicht der Traverse ausreichen, um bei einer angehobenen und schräg gestellten Leiter für ein Verschieben der Traverse in ihrer Längsrichtung zu sorgen, ohne dass dazu Hand an die Traverse gelegt werden muss. Allein das Gewicht der Traverse kann ausreichend sein, dass die Traverse auf der Rolle der Führung in die Richtung rollt, in die die Traverse geneigt ist.The traverse can rest on the rotatable roller of the guide. If the traverse is to be moved in its longitudinal direction, the traverse rolls on the roller without any particular effort being required to move it. Preferably already can the weight of the crossbeam is sufficient to ensure that the crossbeam can be moved in its longitudinal direction when the ladder is raised and inclined, without having to put a hand on the crossbeam. The weight of the traverse alone can be sufficient for the traverse to roll on the roller of the guide in the direction in which the traverse is inclined.

Eine erfindungsgemäße Leiter kann neben dem Steigteil ein Stützteil aufweisen. Eine erfindungsgemäße Leiter kann damit nicht nur eine Anlegeleiter, sondern auch eine Aufstellleiter sein. Das Stützteil kann zwei Holme und zwischen den Holmen angeordnete Sprossen oder Stufen aufweisen. Das Stützteil kann optional eine zweite, gerade Traverse aufweisen, wobei an einem unteren Ende des Stützteils eine Führung vorgesehen sein kann, in der die zweite Traverse in ihrer Längsrichtung verschiebbar angeordnet sein kann, wobei die Führung vorzugsweise ebenfalls wenigsten eine drehbare Rolle aufweist.A ladder according to the invention can have a support part in addition to the riser part. A ladder according to the invention can thus not only be a leaning ladder, but also an erecting ladder. The support part can have two spars and rungs or steps arranged between the spars. The support part can optionally have a second, straight cross member, a guide being provided at a lower end of the support part in which the second cross member can be arranged displaceably in its longitudinal direction, the guide preferably likewise having at least one rotatable roller.

Die wenigstens eine Rolle der Führung kann auf einer Unterseite der ersten und/oder zweiten Traverse angeordnet sein. Es ist möglich, dass sowohl auf der Unterseite als auch auf der Oberseite der ersten und/oder zweiten Traverse Rollen angebracht sind. Ist nur auf der Unterseite der Traverse eine Rolle angebracht, liegt die Traverse bei einem Anheben der Leiter auf dieser Rolle auf und kann dann gut auf der Rolle abrollen. Ist auf der Oberseite keine Rolle angebracht, hat das den Vorteil, dass bei einer auf dem Boden ruhenden Leiter die Traverse, die dann nach oben gedrückt wird, nicht an einer Rolle anliegt. Dadurch wird erreicht, dass bei einer auf dem Boden ruhenden Leiter ein Abrollen und damit Verschieben der Traverse erschwert wird. Das kann wünschenswert sein, um ein unbeabsichtigtes Verschieben der Traverse zu verhindern, insbesondere dann, wenn eine Person auf der Leiter steht. Die erste und/oder zweite Traverse liegt zumindest bei aufgestellter Leiter vorteilhaft mit einer Oberseite an einem im Vergleich zu der wenigstens einen Rolle feststehenden Teil an der Führung an.The at least one role of the guide can be arranged on an underside of the first and / or second cross member. It is possible for rollers to be attached both on the underside and on the upper side of the first and / or second cross member. If a roller is only attached to the underside of the traverse, the traverse rests on this roller when the ladder is lifted and can then roll easily on the roller. If no roller is attached to the top, this has the advantage that when a ladder is resting on the floor, the cross-member, which is then pushed upwards, does not rest on a roller. This makes it more difficult for a ladder resting on the floor to unroll and thus move the crossbeam. This can be desirable to prevent accidental displacement of the crossbeam, especially when a person is standing on the ladder. The first and / or second traverse is at least when the ladder is up advantageously with an upper side on a part on the guide that is fixed in comparison to the at least one roller.

Die erste und/oder zweite Traverse einer erfindungsgemäßen Leiter kann ein Langloch aufweisen, welches sich in einer Längsrichtung der ersten bzw. zweiten Traverse erstreckt. Die wenigstens eine Rolle kann das Langloch durchgreifen. Ist die Leiter aufgerichtet, die Traverse aber angehoben, ist die Traverse nicht belastet. Sie kann mit einer oberen Wand des Langlochs dann auf der Rolle aufliegen und abrollen. In einem aufgerichteten Zustand der Leiter und belasteten Zustand der Traverse liegt die Traverse dann mit einer unteren Wand des Langlochs an. Das Steigteil und/oder das Stützteil kann dann auf der Traverse in Richtung der ersten und/oder zweiten Traverse in ihrer Längsrichtung verschoben werden. Insbesondere in einem solchen Fall ist es sinnvoll, das Steigteil und/oder das Stützteil gegenüber der ersten und/oder zweiten Traverse festzustellen, damit es nicht auch beim Besteigen der Leiter zu einem Verschieben des Steigteils und/oder des Stützteils kommt.The first and / or second cross member of a ladder according to the invention can have an elongated hole which extends in a longitudinal direction of the first or second cross member. The at least one role can reach through the elongated hole. If the ladder is upright but the crossbeam is raised, the crossbeam is not loaded. It can then rest on the roll with an upper wall of the elongated hole and roll off. In an erect state of the ladder and the loaded state of the traverse, the traverse then rests against a lower wall of the elongated hole. The riser part and / or the support part can then be displaced on the cross member in the direction of the first and / or second cross member in their longitudinal direction. In such a case, in particular, it makes sense to locate the climbing part and / or the supporting part in relation to the first and / or second cross member so that the climbing part and / or the supporting part do not move when climbing the ladder.

Um ein Verschieben zu verhindern, wenn es sinnvoll oder notwendig ist, kann die Leiter wenigstens ein Feststellmittel aufweisen, mit dem die erste und/oder zweite Traverse gegenüber dem Steigteil feststellbar ist.In order to prevent displacement, if it is sensible or necessary, the ladder can have at least one locking means with which the first and / or second cross member can be locked relative to the riser.

Die Feststellmittel einer erfindungsgemäßen Leiter können Schrauben umfassen, die quer zu der ersten und/oder zweiten Traverse angeordnet sind. Es ist möglich, dass die Feststellmittel einen Exenterhebel umfassen, der an einem der Holme befestigt ist und der in einer ersten Stellung die Traverse klemmt und in einer zweiten Stellung die Traverse freigibt.The locking means of a ladder according to the invention can comprise screws which are arranged transversely to the first and / or second cross member. It is possible for the locking means to comprise an eccentric lever which is attached to one of the bars and which clamps the cross member in a first position and releases the cross member in a second position.

Die durch das Langloch geführte Rolle kann auf einer Schraube angeordnet sein, die durch den Holm und das Langloch in der ersten und/oder zweiten Traverse hindurchgesteckt ist. Das Ende der Schraube kann in eine Mutter, insbesondere eine Sternmutter eingeschraubt sein. Durch anziehen der Mutter kann die erste und/oder zweite Traverse in dem Holm geklemmt sein.The roller guided through the elongated hole can be arranged on a screw which is inserted through the spar and the elongated hole in the first and / or second cross member. The end of the screw can be screwed into a nut, in particular a star nut. By tightening the nut, the first and / or second traverse can be clamped in the spar.

In dem unteren Ende jedes Holmes des Steigteils und/oder Stützteils kann ein Durchbruch vorgehsehen sein, wobei die Durchbrüche in den unteren Enden der Holme des Steigteils bzw. des Stützteils fluchten. Durch die Durchbrüche können die Traversen verschiebbar sein.An opening can be provided in the lower end of each spar of the riser part and / or support part, the openings in the lower ends of the bars of the riser part or of the support part being aligned. The traverses can be displaced through the openings.

In die unteren Enden der Holme können Führungselemente eingesetzt sein, die ein Teil der Führung bilden, insbesondere ein im Vergleich zu den Rollen feststehendes Teil. Die Führungselemente können Durchbrüche aufweisen, die mit den Durchbrüchen in den Holmen fluchten und durch die die erste bzw. die zweite Traverse geführt sind.Guide elements, which form part of the guide, in particular a part that is fixed in comparison to the rollers, can be inserted into the lower ends of the spars. The guide elements can have openings which are aligned with the openings in the spars and through which the first and second crossbars are guided.

In jedem der Durchbrüche der Führungselemente kann eine sich quer zum Durchbruch erstreckende Achse vorgesehen sein, wobei auf jeder Achse eine der Rollen gelagert ist. Bei den Rollen kann es sich um Hülsen handeln.An axis extending transversely to the opening can be provided in each of the openings in the guide elements, one of the rollers being mounted on each axis. The roles can be sleeves.

Weitere Merkmale und Vorteile der Erfindung werden anhand der nachfolgenden Beschreibung näher erläutert. Darin zeigen:

Fig. 1
eine Ansicht einer erfindungsgemäßen Leiter im aufgestellten Zustand,
Fig. 2
eine Einzelheit der aufgestellten Leiter in einer Ansicht von vorne,
Fig. 3
die Einzelheit gemäß Fig. 2 in einer Ansicht von der Seite,
Fig. 4
einen ersten Schnitt durch die Einzelheit und
Fig. 5
einen zweiten Schnitt durch die Einzelheit.
Further features and advantages of the invention are explained in more detail on the basis of the following description. Show in it:
Fig. 1
a view of a ladder according to the invention in the erected state,
Fig. 2
a detail of the erected ladder in a view from the front,
Fig. 3
the particular according to Fig. 2 in a side view,
Fig. 4
a first cut through the detail and
Fig. 5
a second cut through the detail.

Die erfindungsgemäße Stehleiter weist ein Steigteil 1 und ein Stützteil 2 auf, die schwenkbar miteinander verbunden sind.The stepladder according to the invention has a riser part 1 and a support part 2 which are pivotably connected to one another.

Das Steigteil 1 und das Stützteil 2 weisen jeweils zwei Holme 10, 20 auf, an deren unteren Enden Traversen 14, 24 befestigt sind. An unteren Enden der Traverse 14, 24 sind Füße 15, 25 angebracht, mit denen die Stehleiter auf einem Untergrund stehen kannThe riser part 1 and the support part 2 each have two spars 10, 20, at the lower ends of which cross members 14, 24 are attached. At the lower ends of the traverse 14, 24 feet 15, 25 are attached with which the stepladder can stand on a surface

Die Holme 10 des Steigteils 1 sind durch Stufen 11 miteinander verbunden, die an den Holmen 10 befestigt sind. Außerdem sind die Holme 10 des Steigteils 1 durch ein erstes Plattformteil 12 und eine obere Traverse 13 miteinander verbunden. Das erstes Plattformteil 12 ist über einer obersten Stufe 11 befestigt. Der Abstand zu der obersten Stufe 11 ist so groß wie der Abstand zwischen den Stufen 11 des Steigteils 1 ist. Die Holme 10 überragen das erste Plattformteil 12. Die obere Traverse 13 ist an den oberen Enden der Holme 10 des Steigteils 1 befestigt. Die obere Traverse 13 ist als Ablageschale ausgestaltet und ist im Unterschied zu dem was bei Stehleitern häufig üblich ist, in einer Draufsicht auf die Stehleiter betrachtet, U-förmig gestaltet, was später noch erläutert wird.The bars 10 of the riser part 1 are connected to one another by steps 11 which are attached to the bars 10. In addition, the spars 10 of the riser part 1 are connected to one another by a first platform part 12 and an upper cross member 13. The first platform part 12 is fastened above a topmost step 11. The distance to the uppermost step 11 is as great as the distance between the steps 11 of the riser part 1. The spars 10 protrude beyond the first platform part 12. The upper cross member 13 is attached to the upper ends of the spars 10 of the riser part 1. The upper traverse 13 is designed as a storage tray and is, in contrast to what is common with step ladders It is customary, viewed in a plan view of the stepladder, to be U-shaped, which will be explained later.

Streben 16, die zwischen dem ersten Plattformteil 12 und den Holmen 10 bzw. zwischen der zweituntersten Stufe 11 und den Holmen 10 vorgesehen sind, geben dem Steigteil 1 zusätzliche Stabilität. Die Streben können ggf. entfallen.Struts 16, which are provided between the first platform part 12 and the spars 10 or between the second lowest step 11 and the spars 10, give the riser part 1 additional stability. The struts can be omitted if necessary.

Die Holme 20 des Stützteils 2 sind durch eine Traverse 23 in einem unteren Bereich des Stützteils 2 und durch Stufen 21 und ein zweites Plattformteil 23 im oberen Bereich des Stützteils 2 miteinander verbunden. Das zweite Plattformteil 23 ist am oberen Ende des Stützteils 2 vorgesehen. Die Holme 20 überragen das zweite Plattformteil 23 nicht. Die beiden Stufen 21 des Stützteils haben einen Abstand zueinander, der dem Abstand der Stufen 11 des Steigteils 1 zueinander entspricht. Der Abstand der obersten Stufe 21 des Stützteils 2 zum zweiten Plattformteil 22 ist genauso groß wie der Abstand der obersten Stufe 11 des Stützteils 1 zum ersten Plattformteil 12. Im unteren Teil des Stützteils 1 sind keine Stufen vorgesehen. In dem unteren Teil ist lediglich die Traverse 23 vorgesehen, die durch ein Rohr gebildet ist.The bars 20 of the support part 2 are connected to one another by a cross member 23 in a lower region of the support part 2 and by steps 21 and a second platform part 23 in the upper region of the support part 2. The second platform part 23 is provided at the upper end of the support part 2. The spars 20 do not protrude beyond the second platform part 23. The two steps 21 of the support part have a distance from one another which corresponds to the distance between the steps 11 of the riser part 1 from one another. The distance between the top step 21 of the support part 2 and the second platform part 22 is just as great as the distance between the top step 11 of the support part 1 and the first platform part 12. In the lower part of the support part 1, no steps are provided. In the lower part only the cross member 23 is provided, which is formed by a tube.

Streben 26, die zwischen der untersten Stufe 21 und den Holmen 20 vorgesehen sind, geben dem Stützteil 2 zusätzliche Stabilität.Struts 26, which are provided between the lowest step 21 and the spars 20, give the support part 2 additional stability.

Das erste Plattformteil 12 und das zweite Plattformteil 22 sind durch Scharniere (nicht dargestellt) miteinander verbunden. Über diese Scharniere ist die Schwenkverbindung zwischen dem Steigteil 1 und dem Stützteil 2 hergestellt.The first platform part 12 and the second platform part 22 are connected to one another by hinges (not shown). The pivot connection between the riser part 1 and the support part 2 is established via these hinges.

Unter der Plattform 12, 22 sind Drahtbügel 41, 42 vorgesehen, die ein unabsichtliches zusammenklappen einer aufgestellten Leiter verhindern. Die Gestaltung der Drahtbügel 41, 42 und ihre Funktion sind an sich bekannt, zum Beispiel von einem Klapptritt, der von der Anmelderin unter der Bezeichnung "Hailo L90 Step-ke" vertrieben wird.Wire brackets 41, 42 are provided under the platform 12, 22, which prevent an unintentional collapse of an erected ladder impede. The design of the wire brackets 41, 42 and their function are known per se, for example from a folding step which is sold by the applicant under the name "Hailo L90 Step-ke".

Seile 3, die mit einem Ende an einem Holm 10 des Steigteils 1 und mit einem anderen Ende an einem Holm 20 des Stützteils 2 befestigt sind, begrenzen den Winkel zwischen dem Steigteil 1 und dem Stützteil 2 der aufgestellten erfindungsgemäßen Stehleiter. Die Seile 3 können entfallen, wenn ihre Funktion von den Drahtbügeln übernommen werden.Ropes 3, which are fastened with one end to a stile 10 of the riser part 1 and with another end to a stile 20 of the support part 2, limit the angle between the riser part 1 and the support part 2 of the erected stepladder according to the invention. The ropes 3 can be omitted if their function is taken over by the wire brackets.

Eine erfindungsgemäße Stehleiter und nicht nur die dargestellte erfindungsgemäße Stehleiter kann grundsätzlich wie eine herkömmliche Stehleiter benutzt werden. Ein Benutzer kann die aufgestellte Leiter auf der Steigseite ersteigen und dazu die Stufen des Steigteils belasten. Die über die Plattform 12, 22 verlängerten Holme 10 des Stützteils und die obere Traverse 13 geben dem Benutzer die Möglichkeit sich festzuhalten, etwas abzulegen oder aufzuhängen und vermitteln dem Benutzer, auch ohne dass dieser sich festhält, ein subjektives Gefühl von Sicherheit, das eine herkömmlichen Bockleiter nicht vermitteltA stepladder according to the invention and not only the stepladder according to the invention shown can in principle be used like a conventional stepladder. A user can climb the erected ladder on the climbing side and load the steps of the climbing part. The spars 10 of the support part, which are extended over the platform 12, 22, and the upper cross member 13 give the user the opportunity to hold on, put something down or hang it up and give the user a conventional sense of security even without holding on Trestle ladder not conveyed

Er kann die erfindungsgemäße Stehleiter aber auch wie eine Bockleiter benutzen und dazu die oberste oder die zweitoberste Stufe 11 des Steigteils 1 mit einem Fuß belasten und den anderen Fuß über die Plattform 12, 22 schwingen und auf die oberste oder die zweitoberste Stufe 21 des Stützteils 2 stellen und diese belasten. So breitbeinig aufgestellt hat der Benutzer einen sicheren Stand und belastet das Steigteil 1 und das Stützteil 2 gleichmäßig.He can also use the stepladder according to the invention like a stepladder and for this purpose put one foot on the top or the second from the top step 11 of the climbing part 1 and swing the other foot over the platform 12, 22 and onto the top or the second from the top step 21 of the support part 2 and put a strain on them. Set up with legs apart, the user has a secure stance and loads the riser part 1 and the support part 2 evenly.

Das ist bei einer herkömmlichen Stehleiter so nicht möglich, da es an Stufen am Stützteil 2 fehlt.This is not possible with a conventional stepladder because there are no steps on the support part 2.

Das Benutzen der Stehleiter wie eine Bockleiter wird aber nicht nur durch die zusätzlichen Stufen an dem Stützteil möglich. Es wird auch dadurch erleichtert, dass die Traverse 13 an den oberen Enden der Holme 10 des Steigteils 1 von oben betrachtet U-förmig abgewinkelt ist oder auf vergleichbare Weise gebogen ist. Erst dadurch wird es auf bequeme Art möglich, den Oberköper aufrecht und zentral über die Plattform 12, 22 zu positionieren, während ein Fuß auf eine der Stufen 21 des Stützteils bewegt wird. Das wird erleichtert dadurch, dass die Traverse 13 in einer Projektion von oben stützteilseitig nicht mit der stützteilseitigen Kante der Plattform abschließt, sondern weiter außen und dadurch in der Projektion von oben auf der obersten oder der zweitobersten Stufe 21 des Stützteils 2 liegt oder mit einer der Kanten dieser Stufen zusammenfällt.The use of the stepladder like a stepladder is not only possible because of the additional steps on the support part. It is also facilitated by the fact that the traverse 13 is angled in a U-shape at the upper ends of the spars 10 of the ascending part 1 when viewed from above or is bent in a comparable manner. Only then is it possible in a convenient way to position the upper body upright and centrally over the platform 12, 22 while a foot is moved on one of the steps 21 of the support part. This is facilitated by the fact that in a projection from above the support part side does not end with the support part-side edge of the platform, but lies further outside and thus in the projection from above on the top or second from the top step 21 of the support part 2 or with one of the Edges of these steps coincides.

Die Holme 10 des Steigteils 1 und die Holme 20 des Stützteils 2 sind aus Rechteckrohren hergestellt. Die unteren Enden der Holme 10 des Steigteils 1 und der Holme 20 des Stützteils 2 weisen Durchbrüche auf. Außerdem sind in die unteren Enden der Holme 10, 20 Führungselemente 3 eingesetzt. Es kann sich dabei um Kunststoffspritzgussteile handeln. Die Führungselemente 3 weisen ebenfalls Durchbrüche auf, die in einer Flucht mit den Durchbrüchen in den unteren Enden der Holme 10, 20 liegen. Die Traversen 14, 24 sind durch die Durchbrüche durchgesteckt.The bars 10 of the riser part 1 and the bars 20 of the support part 2 are made from rectangular tubes. The lower ends of the bars 10 of the riser part 1 and the bars 20 of the support part 2 have openings. In addition, guide elements 3 are inserted into the lower ends of the spars 10, 20. These can be plastic injection molded parts. The guide elements 3 also have openings that are in alignment with the openings in the lower ends of the bars 10, 20. The traverses 14, 24 are pushed through the openings.

Auf einer Unterseite der Traversen 14, 24 ist in jedem der Durchbrüche der Führungselemente 3 eine Achse 4 vorgesehen, die sich quer zu dem Durchbruch und quer zur Traverse 14, 24 erstreckt. Auf jeder dieser Achsen 4 ist eine Hülse 5 vorgesehen, die eine auf der Achse 4 gelagerte Rolle 5 bildet. Bei der aufgestellten Leiter ist, wie in den Figuren dargestellt, zwischen der Rolle 5 und der Unterseite der Traversen 14, 24 ein geringer Spalt vorgesehen.On an underside of the traverses 14, 24, an axis 4 is provided in each of the openings of the guide elements 3, which axis extends transversely to the opening and transversely to the traverse 14, 24. On each of these axles 4 a sleeve 5 is provided which forms a roller 5 mounted on the axle 4. With the erected ladder is As shown in the figures, a small gap is provided between the roller 5 and the underside of the cross members 14, 24.

Auf der Oberseite der Traversen 14, 24
liegen die Traversen 14, 24 dagegen an der Innenseite des Durchbruchs in den Führungselementen 3 an.On top of the crossbars 14, 24
on the other hand, the cross members 14, 24 rest against the inside of the opening in the guide elements 3.

Die Achsen 4 werden durch je einen Rohrniet gebildet, die durch Durchgangslöcher in den Seitenwänden der Durchbrüche in den Führungselementen und in den unteren Enden der Holme 10, 20 eingesteckt und durch Aufweiten ihrer Enden fixiert sind.The axes 4 are each formed by a tubular rivet which is inserted through through holes in the side walls of the openings in the guide elements and in the lower ends of the spars 10, 20 and fixed by widening their ends.

Zwischen der Unterseite und der Oberseite der Traversen 14, 24 sind in den Führungselementen 3 und in den unteren Enden der Holme 10, 20 Ausnehmungen vorgesehen, in die u.a. eine Mutter 6 eingesetzt ist, die zwischen der Wand der Holme 14, 24 und dem Führungselement 3 gehalten wird. In die Muttern 6 ist je eine Sterngriffschraube 7 eingeschraubt, deren Enden bis an die Traversen 14, 24 reichen. Zum Feststellen der Traversen 14, 24 werden diese Sterngriffschrauben 7 gegen die Traversen 14, 24 geschraubt. Die Traversen 14, 24 werden dadurch in den Führungselementen 3 geklemmt gehalten.Between the underside and the top of the crossbars 14, 24, recesses are provided in the guide elements 3 and in the lower ends of the bars 10, 20, into which, among other things, a nut 6 is inserted between the wall of the bars 14, 24 and the guide element 3 is held. A star grip screw 7 is screwed into each of the nuts 6, the ends of which extend as far as the cross members 14, 24. To fix the crossbars 14, 24, these star grip screws 7 are screwed against the crossbars 14, 24. The traverses 14, 24 are thereby held clamped in the guide elements 3.

Sollen die Traversen 14, 24 verschoben werden, werden die Sterngriffschrauben 7 gelockert, so dass die Klemmung der Traversen 14, 24 aufgehoben wird. Wird dann noch die Leiter angehoben, senken sich die Traversen 14, 24 innerhalb der Durchbrüche in den Führungselementen 3 nach unten. Der Spalt zwischen den Rollen 5 und den Traversen 14, 24 verschwindet und die Traversen 14, 24 kommen zur Auflage auf den Rollen 5 auf. Zwischen der Oberseite der Traversen 14, 24 entsteht dann ein Spalt.If the crossbars 14, 24 are to be moved, the star grip screws 7 are loosened so that the clamping of the crossbars 14, 24 is released. If the ladder is then raised, the cross members 14, 24 are lowered within the openings in the guide elements 3. The gap between the rollers 5 and the crossbars 14, 24 disappears and the crossbars 14, 24 come to rest on the rollers 5. A gap then arises between the top of the cross members 14, 24.

Die Traversen 14, 24 liegen dann auf den Rollen 5 auf und durch eine leichte Schräglage der Leiter 1 können die Traversen 14, 24 auf den Rollen 5 abrollen, wodurch sich die Traversen 14, 24 verschieben, ohne dass zusätzlich Hand angelegt werden muss.The traverses 14, 24 then rest on the rollers 5 and by a slight inclination of the ladder 1, the traverses 14, 24 can roll on the rollers 5, whereby the traverses 14, 24 move without the need for additional hands.

Schrauben 8, die in die Traversen 14, 24 eingeschraubt sind, begrenzen den Weg, um den die Traversen 14, 24 verschoben werden können.Screws 8, which are screwed into the crossbars 14, 24, limit the distance by which the crossbars 14, 24 can be moved.

Claims (13)

  1. Ladder having a rising part (1) which has two rails (10) and rungs or steps (11) arranged between the rails (10), and having a first, straight crossbar (14), wherein at a lower end of the rising part (1) a guide is provided in which the first crossbar (14) is arranged to be displaceable in its longitudinal direction,
    characterised in that
    the guide has at least one rotatable roller (5).
  2. Ladder according to claim 1, characterised in that the ladder has a support part (2) which has two rails (20) and rungs or steps (21) arranged between the rails, and a second, straight crossbar (24), wherein at a lower end of the support part (2) a guide is provided in which the second crossbar (24) is arranged to be displaceable in its longitudinal direction, wherein the guide also has at least one rotatable roller (5), and wherein the rising part (1) and the support part (2) are pivotably connected together.
  3. Ladder according to claim 1 or 2, characterised in that the at least one roller (5) is arranged on an underside of the first and/or second crossbar (14, 24).
  4. Ladder according to claim 1 or 3, characterised in that the first and/or second crossbar has an elongated hole which extends in a longitudinal direction of the first and second crossbar, respectively, and that the at least one roller passes through the elongated hole.
  5. Ladder according to claim 3 or 4, characterised in that the first and/or second crossbar (14, 24) rests on the at least one roller (5) at least when the ladder is raised.
  6. Ladder according to any of claims 3 to 5, characterised in that the first and/or second crossbar (14, 24) bears, at least when the ladder is erected, against a part (3) of the guide which is fixed compared to the at least one roller (5).
  7. Ladder according to any of claims 1 to 6, characterised in that the ladder has at least one locking means (6, 7) by means of which the first and/or second crossbar (14, 24) can be locked relative to the rising part (2).
  8. Ladder according to any of claims 1 to 7, characterised in that an aperture is provided in the lower end of each rail (10, 20) of the rising part (1) and/or support part (2), wherein the apertures in the lower ends of the rails (10, 20) of the rising part (1) and the support part (2), respectively, are aligned.
  9. Ladder according to any of claims 1 to 8, characterised in that guide elements (3) are inserted into the lower ends of the rails (10. 20) and form part of the guide.
  10. Ladder according to claim 9, characterised in that the guide elements (3) have apertures which are aligned with the apertures in the rails (10, 20) and through which the first and second crossbars (14, 24), respectively, are guided.
  11. Ladder according to claim 10, characterised in that at least one axle (4) extending transversely to the aperture is provided in each of the apertures of the guide elements (3), wherein one of the rollers (5) is mounted on each of the axles.
  12. Ladder according to claim 11, characterised in that the rollers (5) are sleeves.
  13. Ladder according to any of claims 7 to 12, characterised in that the locking means (6, 7) comprise screws (7) arranged transversely to the first and/or second crossbar (14, 24).
EP18155714.1A 2018-02-07 2018-02-08 Ladder with a traverse Active EP3524769B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18155574.9A EP3524768B1 (en) 2018-02-07 2018-02-07 Step ladder, in particular step ladder with treads

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Publication Number Publication Date
EP3524769A1 EP3524769A1 (en) 2019-08-14
EP3524769B1 true EP3524769B1 (en) 2021-09-22

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ID=61187198

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Application Number Title Priority Date Filing Date
EP18155574.9A Active EP3524768B1 (en) 2018-02-07 2018-02-07 Step ladder, in particular step ladder with treads
EP18155714.1A Active EP3524769B1 (en) 2018-02-07 2018-02-08 Ladder with a traverse

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Application Number Title Priority Date Filing Date
EP18155574.9A Active EP3524768B1 (en) 2018-02-07 2018-02-07 Step ladder, in particular step ladder with treads

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200095828A1 (en) * 2018-09-26 2020-03-26 HD Assembly Inc. Low-Profile Fly Arm Step Ladder

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2931503A1 (en) * 1978-08-03 1980-03-06 Julius Fuchs Adjustable ladder for use on sloping base - has clamping profiles formed by stringer supports and plinth profiles
WO1985003103A1 (en) * 1984-01-11 1985-07-18 Milba Properties Pty. Ltd. Levelling device for ladders
FR2621952B1 (en) * 1987-10-14 1990-12-14 Fameca Sa LEVEL COMPENSATOR FOR LADDER
JPH01275892A (en) * 1988-04-26 1989-11-06 Natl House Ind Co Ltd Trestle with tread
CA2162827A1 (en) 1995-11-14 1997-05-15 Gilles Gagnon Stepladder including a bracing shelf
DE202007001250U1 (en) 2007-01-27 2007-04-12 Guenzburger Steigtechnik Munk Ladder, comprises transversal lower bar with adjustable feet joined with particularly safe system
CN202125239U (en) * 2011-06-13 2012-01-25 余振荣 Anti-pinch device of folding ladder
DE202012100438U1 (en) * 2012-02-09 2013-05-10 Hailo-Werk Rudolf Loh Gmbh & Co. Kg Ladder, in particular stepladder with a snap-in protection
EP2789787B1 (en) * 2013-04-11 2016-10-19 Hailo-Werk Rudolf Loh GmbH & Co. KG Ladder, in particular a step ladder with prevention against sinking
CN206246045U (en) * 2016-11-29 2017-06-13 佛山市顺德区万怡家居用品有限公司 The support feet pipe connecting structure of Multifunctional telescopic ladder
CN206495636U (en) * 2017-02-28 2017-09-15 石家庄华友电子有限公司 A kind of customized combination ladder of construction of special positions

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EP3524768B1 (en) 2021-04-28
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