EP0244668B1 - Ladder arrangement with extendable ladder sections, particularly a fire ladder - Google Patents

Ladder arrangement with extendable ladder sections, particularly a fire ladder Download PDF

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Publication number
EP0244668B1
EP0244668B1 EP87105389A EP87105389A EP0244668B1 EP 0244668 B1 EP0244668 B1 EP 0244668B1 EP 87105389 A EP87105389 A EP 87105389A EP 87105389 A EP87105389 A EP 87105389A EP 0244668 B1 EP0244668 B1 EP 0244668B1
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EP
European Patent Office
Prior art keywords
ladder
angle member
arrangement according
welded
projection
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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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EP87105389A
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German (de)
French (fr)
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EP0244668A3 (en
EP0244668A2 (en
Inventor
Paul Dipl.-Ing. Keller (Fh)
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Iveco Magirus AG
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Iveco Magirus AG
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Priority to AT87105389T priority Critical patent/ATE63603T1/en
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Publication of EP0244668A3 publication Critical patent/EP0244668A3/en
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C5/00—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles
    • E06C5/02—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members
    • E06C5/04—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members capable of being elevated or extended ; Fastening means during transport, e.g. mechanical, hydraulic
    • 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
    • E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
    • E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
    • E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic

Definitions

  • the invention relates to a ladder arrangement with extendable ladder parts, in particular fire chief, according to the preamble of claim 1.
  • Known fire brigade ladders with extendable ladder parts the ladder bars of which have a lower chord and upper chord which are firmly connected to one another by means of diagonal struts, are profiled with respect to the lower chord and upper chord in such a way that high torsional and bending rigidity is present.
  • complex profiled bars are used, which contain multiple beads and multiple folds.
  • the spars are further stiffened by additional profiles such as cross struts and square tube, as is known for example from DE-PS 28 44 439.
  • the different conductor sets are inexpensive to manufacture and tend to corrode, particularly in the area of the folds and beads of the bars, due to the inaccessibility with a welding gun, paint gun, etc.
  • the object of the invention is to improve the known conductor arrangement according to DE-OS 33 26 644 and, in particular, to create a conductor arrangement of the type mentioned at the beginning, the lower flange spars of which are designed in function and shape with a simple construction in such a way that the conductor spars withstand the predicted alternating loads and corrosion stresses, ie there is a high alternating load and corrosion stress with a simple structure of the arrangement.
  • the essential feature of the invention is therefore a ladder bar, which in cross-section presents itself in its entirety as a closed body with at least three closed cavities.
  • Highly stressed edge zones which are most exposed to the risk of breakage, are not taken up by a protruding flag as in DE-OS 33 26 644, but rather by means of outer hollow bodies or hollow body lugs formed with the profile, in which the edge stresses can be distributed very well.
  • the external cavities oppose the conductor to great flexural rigidity in horizontal and vertical stress.
  • the inner angle profile absorbs the forces which are initiated upwards by the inner conductor part via the rear sliders.
  • the nose is supported on the diagonal struts and on the outer angle profile.
  • the inner angle profile serves as a sliding surface and force absorption in the vertical and horizontal directions for an internal conductor part.
  • the nose has the main task, the horizontal stress Record shear stresses without buckling. Good welding of the rungs is also achieved.
  • the lower flange or spar essentially consists of three elements: an internal angle profile with hollow body lugs on the end, an external angle profile with an external nose or roll-in bead, and an underlying angle profile, which serves as a running surface for pushing the ladder parts in and out.
  • the aforementioned three elements are calculated and optimized in advance depending on the load in their wall thicknesses, so that a reasonable lightweight construction can be achieved inexpensively.
  • the front sliding blocks for the lateral guide are permanently mounted on the inner angle profile, adjustable and removable to the front. They have a small contact surface as a lateral guide for the internal conductor part and serve as a force transducer in the vertical direction when the conductor is placed on it or when used as a bridge.
  • the invention creates a ladder with an approach to the carrier of the same bending strength, and thus an optimal weight. Reinforcement is possible at highly stressed points within the spar without external visibility.
  • the same tools for different wall thicknesses of the individual elements can be used to manufacture the profiles.
  • An optimal gradation of the individual bars of the ladder parts is possible.
  • the tightly welded spar ensures the best corrosion protection.
  • the external welding is particularly suitable for robots.
  • Fig. 1 the ladder arrangement (1) of a fire ladder with four ladder parts (2) with horizontal rungs (7) is shown.
  • the individual conductor parts (2) are telescopically inserted.
  • Each conductor part (2) is essentially identical in cross-section, comprises an upper chord (5) on the right and left and lower chords (4) on the right and left, with associated lower chord and upper chord elements being connected to one another by diagonal struts (6).
  • the horizontal rungs (7) are welded between the associated lower chord elements.
  • Each top flange (5) of the ladder parts (2) consists of an eccentric square tube (29) with a downward-pointing flag (30), the outside of which is used to fasten the diagonal struts (6).
  • the top and bottom of the square tube (29) is used as a roller or slideway for an elevator, not shown.
  • the lower angle profile (18) comprises a horizontally outward, also flat leg (20), the free end of which is welded to the lower free end of the vertical leg (16) of the external angle profile (14), so that a main body cavity ( 1O) is formed in the spar.
  • the front sliding blocks (25) of the individual conductor parts (2) are shown on the left in FIG. 1 and in more detail in FIG. 2. They are fixed under the second hollow body nose (9) of the internal angle profile (11), but are adjustable, are mounted on the angle profile (11) and can be removed from the ladder section towards the front. They create a comparatively small contact surface (28) for the associated curling bead (17) of the inner conductor part, so that during operation there is practically no contamination of the lateral spar areas and the visual appearance of each conductor part (2) is therefore good.
  • the rear sliding blocks (26) of the individual conductor parts (2) are shown on the right in FIG. 1 and in more detail in FIG. 3. While the front, first mentioned sliding blocks (25) for lateral guidance of the individual ladder parts, the last-mentioned rear sliding blocks (26) are provided for vertical guidance, are larger in cross-section and, in contrast to the front sliding blocks (25), not on the inside angle profile (11) but on the rolling bead (17) of the outer angle profile (14) fixed, but adjustable. The sliding blocks (26) therefore slide during operation on the adjacent inner angle profile (11) of the outer conductor part. The sliding blocks (26) can be removed from the ladder section after releasing the fixed attachment.
  • the first hollow body nose (8) of the inner angle profile (11) of the innermost conductor part (2) is designed as a receiving space for an inner cable (21), which is therefore comprehensively protected against damage.
  • top rollers (24) run on top rollers (24), one of which is shown in broken lines in FIG. 3.
  • the underside of the horizontal smooth leg (20) of the angle profile (18) below serves as a support or running surface for the top roller (24).
  • a further angle profile (22) with smooth legs inside the main cavity (10) can be welded in an accommodated manner in order to create additional partial cavities and to bridge the curling bead (17).
  • the vertical leg (23) of the further angle profile (22) abuts the horizontal leg (2O) of the underlying angle profile (18) in a stabilizing manner in order to additionally reinforce the latter leg (2O), the underside of which acts as a running surface for the associated top roller (24). serves.
  • the arrangement of the further angle profile (22) in the spar and the Assembly of the individual components results in particular from FIG. 4.
  • the individual elements are shown in an end view and in perspective in a manner such that they are welded together in modular construction to form the finished conductor part.
  • the attachment of the weld seam (31) in the upper region of the spar is of great importance, so that the conductor part is given a desired crowning by the shrinking process of the weld and thus straightening work is unnecessary.
  • individual tack weld points (27) are placed in the longitudinal direction on the second hollow body nose (9) in order to prevent the second hollow body nose (9) from evading under high stress.

Description

Die Erfindung betrifft eine Leiteranordnung mit ausschiebbaren Leiterteilen, insbesondere Feuerwehrleiter, gemäß Oberbegriff des Anspruchs 1.The invention relates to a ladder arrangement with extendable ladder parts, in particular fire chief, according to the preamble of claim 1.

Bekannte Feuerwehrleitern mit ausschiebbaren Leiterteilen, deren Leiterholme Untergurt und Obergurt besitzen, die miteinander mittels Diagonalstreben fest verbunden sind, sind im Hinblick auf Untergurt und Obergurt in einer Weise profiliert, daß hohe Verdreh- und Biegesteifigkeit vorhanden ist. Um dies zu erreichen, finden kompliziert profilierte Holme Verwendung, die Mehrfachsicken und Mehrfachabkantungen enthalten. Die Holme sind des weiteren durch Zusatzprofile wie Querstreben und Vierkantrohr versteift, wie dies beispielsweise aus DE-PS 28 44 439 bekannt ist. Die verschiedenen Leitersätze sind kostenungünstig zu fertigen und neigen insbesondere im Abkantungs- und Sicken-Bereich der Holme zur Korrosion, bedingt durch die Unzugänglichkeit mit einer Schweißpistole, Lackierpistole, etc.. Auch Abdichtungsvorrichtungen bereiten große Schwierigkeiten, insbesondere bei Holmen mit Einrollsicken und offenen Fahnenenden in Querschnittsansicht (vgl. DE-OS 33 26 644). Bei hoher Beanspruchung der Holmgleitbahn sowie der Holmlaufbahn ist mit plastischen Verformungen zwischen den Diagonalstreben zu rechnen, da die offenen oder abstehenden Fahnenenden der Holme vergleichsweise instabil sind. So können auch die Kopfrollen zwischen den einzelnen Leiterteilen eine Verbiegung der unteren Laufbahn eines Holms bewirken. Die aus DE-OS 33 26 644 bekannten Gleiter für die Seitenführung der Leiterteile weisen eine vergleichsweise große Gleitfläche auf, wodurch im Betrieb die Gleitflächenabschnitte der Holme verschmutzen können und das optische Bild der Leiteranordnung verschlechtern.Known fire brigade ladders with extendable ladder parts, the ladder bars of which have a lower chord and upper chord which are firmly connected to one another by means of diagonal struts, are profiled with respect to the lower chord and upper chord in such a way that high torsional and bending rigidity is present. To achieve this, complex profiled bars are used, which contain multiple beads and multiple folds. The spars are further stiffened by additional profiles such as cross struts and square tube, as is known for example from DE-PS 28 44 439. The different conductor sets are inexpensive to manufacture and tend to corrode, particularly in the area of the folds and beads of the bars, due to the inaccessibility with a welding gun, paint gun, etc. Sealing devices also pose great difficulties, especially with bars with roll-in beads and open flag ends Cross-sectional view (see DE-OS 33 26 644). If the spar guide rail and the spar runway are subjected to high loads, plastic deformations between the diagonal struts are to be expected, since the open or protruding tab ends of the spars are comparatively unstable. The top rollers between the individual conductor parts can also cause the lower raceway of a spar to bend. The slides known from DE-OS 33 26 644 for the lateral guidance of the ladder parts have a comparatively large sliding surface, as a result of which the sliding surface sections of the spars can become dirty during operation and deteriorate the optical image of the conductor arrangement.

Aufgabe der Erfindung ist die Verbesserung der bekannten Leiteranordnung nach DE-OS 33 26 644 und insbesondere die Schaffung einer Leiteranordnung der eingangs genannten Art, deren Untergurtholme in Funktion und Gestalt bei einfachem Aufbau so ausgebildet sind, daß die Leiterholme den vorausberechneten Wechselbelastungen und Korrosionsbeanspruchungen standhält, d.h. eine hohe Wechselbelastung und Korrosionsbeanspruchung bei einfachem Aufbau der Anordnung gegeben ist.The object of the invention is to improve the known conductor arrangement according to DE-OS 33 26 644 and, in particular, to create a conductor arrangement of the type mentioned at the beginning, the lower flange spars of which are designed in function and shape with a simple construction in such a way that the conductor spars withstand the predicted alternating loads and corrosion stresses, ie there is a high alternating load and corrosion stress with a simple structure of the arrangement.

Gelöst wird die der Erfindung zugrundeliegende Aufgabe mit den im kennzeichnenden Teil des Anspruchs 1 angegebenen Mitteln.The object on which the invention is based is achieved with the means specified in the characterizing part of claim 1.

Vorteilhaft weitergebildet wird die Erfindung gemäß den Merkmalen der Unteransprüche 2 bis 10.The invention is advantageously further developed according to the features of subclaims 2 to 10.

Wesensmerkmal der Erfindung ist mithin ein Leiterholm, der sich im Querschnitt in seiner Gesamtheit als geschlossener Körper mit zumindest drei geschlossenen Hohlräumen darstellt. Hochbeanspruchte Randzonen, die der Bruchgefahr am meisten ausgesetzt sind, werden nicht durch eine abstehende Fahne wie nach DE-OS 33 26 644 aufgenommen, sondern durch mit dem Profil gebildete Außenhohlkörper bzw. Hohlkörpernasen, in denen sich die Randspannungen sehr gut verteilen können. Die außenliegenden Hohlräume setzen der Leiter in horizontaler und vertikaler Beanspruchung große Biegesteifigkeit entgegen. Das innere Winkelprofil nimmt mit seiner oberen Hohlkörpernase die Kräfte auf, welche von dem inneren Leiterteil über die hinteren Gleiter nach oben initiiert werden. Dabei stützt sich die Nase an den Diagonalstreben und am äußeren Winkelprofil ab. Ferner dient das innere Winkelprofil als Gleitfläche und Kraftaufnahme in vertikaler und horizontaler Richtung für ein innenliegendes Leiterteil. Die Nase hat vorwiegend die Aufgabe, bei horizontaler Beanspruchung die Schubspannungen ohne auszuknicken aufzunehmen. Außerdem wird eine gute Einschweißung der Sprossen erreicht. Der Untergurt bzw. Holm besteht im wesentlichen aus drei Elementen: einem innenliegenden Winkelprofil mit endseitigen Hohlkörpernasen, einem außenliegenden Winkelprofil mit einer Außennase oder Einrollsicke, sowie einem untenliegenden Winkelprofil, welches als Lauffläche für das Ein- und Ausschieben der Leiterteile dient. Die vorgenannten drei Elemente werden je nach Belastung in ihren Wanddicken im voraus berechnet und optimiert, so daß eine vernünftige Leichtbauweise kostengünstig erreicht werden kann. An den hochbeanspruchten Stellen des Leiterholms kann durch zusätzliche Verstärkungen oder Winkelprofile im Holm die Lauffläche gegen plastische Verformungen geschützt und das Widerstandsmoment im Holm selbst verstärkt werden. Die vorderen Gleitsteine für die seitliche Führung sind am inneren Winkelprofil fest montiert, einstellbar und nach vorne herausnehmbar. Sie besitzen eine geringe Anlagefläche als seitliche Führung für das innenliegende Leiterteil und dienen als Kraftaufnehmer in vertikaler Richtung beim Auflegen der Leiter bzw. bei Benutzung als Brücke.The essential feature of the invention is therefore a ladder bar, which in cross-section presents itself in its entirety as a closed body with at least three closed cavities. Highly stressed edge zones, which are most exposed to the risk of breakage, are not taken up by a protruding flag as in DE-OS 33 26 644, but rather by means of outer hollow bodies or hollow body lugs formed with the profile, in which the edge stresses can be distributed very well. The external cavities oppose the conductor to great flexural rigidity in horizontal and vertical stress. With its upper hollow body nose, the inner angle profile absorbs the forces which are initiated upwards by the inner conductor part via the rear sliders. The nose is supported on the diagonal struts and on the outer angle profile. Furthermore, the inner angle profile serves as a sliding surface and force absorption in the vertical and horizontal directions for an internal conductor part. The nose has the main task, the horizontal stress Record shear stresses without buckling. Good welding of the rungs is also achieved. The lower flange or spar essentially consists of three elements: an internal angle profile with hollow body lugs on the end, an external angle profile with an external nose or roll-in bead, and an underlying angle profile, which serves as a running surface for pushing the ladder parts in and out. The aforementioned three elements are calculated and optimized in advance depending on the load in their wall thicknesses, so that a reasonable lightweight construction can be achieved inexpensively. At the highly stressed points on the ladder stile, additional reinforcements or angle profiles in the stile can be used to protect the tread against plastic deformation and to increase the section modulus itself in the stile. The front sliding blocks for the lateral guide are permanently mounted on the inner angle profile, adjustable and removable to the front. They have a small contact surface as a lateral guide for the internal conductor part and serve as a force transducer in the vertical direction when the conductor is placed on it or when used as a bridge.

Mithin wird durch die Erfindung eine Leiter mit Annäherung an den Träger gleicher Biegefestigkeit geschaffen, und damit ein optimales Gewicht. Verstärkungsmöglichkeit an hochbeanspruchten Stellen innerhalb des Holmes ohne äußere Sichtbarkeit ist gegeben. Für die Herstellung der Profile können gleiche Werkzeuge für unterschiedliche Wanddicken der einzelnen Elemente verwendet werden. Eine optimale Abstufung der einzelnen Holme der Leiterteile ist möglich. Der dicht geschweißte Holm gewährleistet besten Korrosionsschutz. Die Außenschweißung ist insbesondere für Roboter geeignet.Thus, the invention creates a ladder with an approach to the carrier of the same bending strength, and thus an optimal weight. Reinforcement is possible at highly stressed points within the spar without external visibility. The same tools for different wall thicknesses of the individual elements can be used to manufacture the profiles. An optimal gradation of the individual bars of the ladder parts is possible. The tightly welded spar ensures the best corrosion protection. The external welding is particularly suitable for robots.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die beigefügte Zeichnung näher erläutert; es zeigen:

Fig. 1
in schematischer Frontansicht die rechte hintere Hälfte sowie die linke vordere Hälfte einer Feuerwehrleiter mit vier Leiterteilen,
Fig. 2
eine Einzelheit der linken Leiterhälfte nach Fig. 1,
Fig. 3
eine Einzelheit der rechten Feuerwehr-Leiterhälfte nach Fig. 1, und
Fig. 4
Stirnansicht eines Leiterteils mit Einzelelementen in perspektivischer auseinandergezogener Darstellung.
The invention is explained below using an exemplary embodiment with reference to the accompanying drawings; show it:
Fig. 1
the right rear half and the left front half of a fire ladder with four ladder parts in a schematic front view,
Fig. 2
a detail of the left half of the conductor of FIG. 1,
Fig. 3
a detail of the right half of the fire brigade according to Fig. 1, and
Fig. 4
Front view of a ladder part with individual elements in a perspective exploded view.

In Fig. 1 ist die Leiteranordnung (1) einer Feuerwehrleiter mit vier Leiterteilen (2) mit horizontalen Sprossen (7) dargestellt. Die einzelnen Leiterteile (2) sind teleskopartig ineinandergesteckt.In Fig. 1, the ladder arrangement (1) of a fire ladder with four ladder parts (2) with horizontal rungs (7) is shown. The individual conductor parts (2) are telescopically inserted.

Jedes Leiterteil (2) ist querschnittsmäßig im wesentlichen gleich ausgebildet, umfaßt rechts und links einen Obergurt (5) sowie rechts und links Untergurte (4), wobei zugehörige Untergurt- und Obergurtelemente durch Diagonalstreben (6) miteinander verbunden sind. Die horizontalen Sprossen (7) sind hierbei zwischen zugehörigen Untergurtelementen verschweißt.Each conductor part (2) is essentially identical in cross-section, comprises an upper chord (5) on the right and left and lower chords (4) on the right and left, with associated lower chord and upper chord elements being connected to one another by diagonal struts (6). The horizontal rungs (7) are welded between the associated lower chord elements.

Jeder Obergurt (5) der Leiterteile (2) besteht aus einem außermittigen Vierkantrohr (29) mit nach unten gerichteter Fahne (3O), deren Außenseite zur Befestigung der Diagonalstreben (6) dient. Die Ober- sowie die Unterseite des Vierkantrohrs (29) wird als Roll- bzw. Gleitbahn für einen nicht veranschaulichten Fahrstuhl verwendet.Each top flange (5) of the ladder parts (2) consists of an eccentric square tube (29) with a downward-pointing flag (30), the outside of which is used to fasten the diagonal struts (6). The top and bottom of the square tube (29) is used as a roller or slideway for an elevator, not shown.

Wie die Obergurte (5), so sind auch die einzelnen Untergurte (4) der Leiterteile zwar unterschiedlich dimensioniert, jedoch gleich profiliert. Jeder Untergurt (4) oder in Längsrichtung verlaufender Leiterholm umfaßt zumindest drei miteinander verschweißte Einzelelemente, wie dies in größerer Einzelheit den Fig.2 bis 4 zu entnehmen ist:

  • ein innenliegendes Winkelprofil (11) mit einem horizontalen Schenkel (12) und einem vertikalen Schenkel (13), deren freie Enden als erste nach oben weisende Hohlkörpernase (8) bzw. als zweite nach innen weisende Hohlkörpernase (9) ausgebildet sind,
  • ein außenliegendes Winkelprofil (14) mit einem horizontalen Schenkel (15), der im Bereich der zweiten Hohlkörpernase (9) am innenliegenden Winkelprofil (11) verschweißt ist, wobei die zweite Hohlkörpernase (9) höher liegt als der horizontale Schenkel (15) des außenliegenden Winkelprofils (14), und mit einem vertikalen Schenkel (16), der eine Einrollsicke (17) nach außen aufweist,
  • ein untenliegendes Winkelprofil (18) mit einem ebenen, d.h. ohne Einrollsicken ausgebildeten, vertikalen Schenkel (19), der an der Wurzel des innenliegenden Winkelprofils (11) unterseitig verschweißt ist.
Like the upper chords (5), the individual lower chords (4) of the ladder parts are of different dimensions, but they have the same profile. Each lower chord (4) or longitudinal spar comprises at least three individual elements welded together, as can be seen in greater detail in FIGS. 2 to 4:
  • an internal angle profile (11) with a horizontal leg (12) and a vertical leg (13), the free ends of which are formed as the first hollow body nose (8) pointing upwards or as the second hollow body nose (9) pointing inwards,
  • an external angle profile (14) with a horizontal leg (15) which is welded in the area of the second hollow body nose (9) to the inner angle profile (11), the second hollow body nose (9) being higher than the horizontal leg (15) of the outside Angle profile (14), and with a vertical leg (16) which has a rolling bead (17) to the outside,
  • an angular profile (18) at the bottom with a flat, that is to say formed without vertical beads, vertical leg (19) which is welded on the underside at the root of the internal angular profile (11).

Ferner umfaßt das untenliegende Winkelprofil (18) einen horizontal nach außen weisenden ebenfalls ebenen Schenkel (2O), dessen freies Ende mit dem unteren freien Ende des vertikalen Schenkels (16) des außenliegenden Winkelprofils (14) verschweißt ist, so daß ein Hauptkörper-Hohlraum (1O) im Holm gebildet ist.Furthermore, the lower angle profile (18) comprises a horizontally outward, also flat leg (20), the free end of which is welded to the lower free end of the vertical leg (16) of the external angle profile (14), so that a main body cavity ( 1O) is formed in the spar.

Die vorderen Gleitsteine (25) der einzelnen Leiterteile (2) sind in Fig. 1 links und in größerer Einzelheit in Fig. 2 gezeigt. Sie sind unter der zweiten Hohlkörpernase (9) des innenliegenden Winkelprofils (11) fest, jedoch einstellbar, am Winkelprofil (11) montiert und nach vorne aus dem Leiterteil ausbaubar. Sie schaffen eine vergleichsweise kleine Anlagefläche (28) zur zugehörigen Einrollsicke (17) des innenliegenden Leiterteils, wodurch im Betrieb praktisch keine Verschmutzung der seitlichen Holmbereiche auftritt und damit das optische Erscheinungsbild jedes Leiterteils (2) gut ist.The front sliding blocks (25) of the individual conductor parts (2) are shown on the left in FIG. 1 and in more detail in FIG. 2. They are fixed under the second hollow body nose (9) of the internal angle profile (11), but are adjustable, are mounted on the angle profile (11) and can be removed from the ladder section towards the front. They create a comparatively small contact surface (28) for the associated curling bead (17) of the inner conductor part, so that during operation there is practically no contamination of the lateral spar areas and the visual appearance of each conductor part (2) is therefore good.

Die hinteren Gleitsteine (26) der einzelnen Leiterteile (2) sind in Fig. 1 rechts und in größerer Einzelheit in Fig. 3 dargestellt. Während die vorderen, erstgenannten Gleitsteine (25) für eine seitliche Führung der einzelnen Leiterteile sorgen, sind die letztgenannten hinteren Gleitsteine (26) für eine Vertikalführung vorgesehen, querschnittsmäßig größer dimensioniert und im Gegensatz zu den vorderen Gleitsteinen (25) nicht am innenliegenden Winkelprofil (11), sondern an der Einrollsicke (17) des außenliegenden Winkelprofils (14) fest, jedoch einstellbar befestigt. Mithin gleiten die Gleitsteine (26) im Betrieb an dem benachbarten innenliegenden Winkelprofil (11) des außenliegenden Leiterteils. Die Gleitsteine (26) sind nach hinten nach Lösung der festen Befestigung aus dem Leiterteil ausbaubar.The rear sliding blocks (26) of the individual conductor parts (2) are shown on the right in FIG. 1 and in more detail in FIG. 3. While the front, first mentioned sliding blocks (25) for lateral guidance of the individual ladder parts, the last-mentioned rear sliding blocks (26) are provided for vertical guidance, are larger in cross-section and, in contrast to the front sliding blocks (25), not on the inside angle profile (11) but on the rolling bead (17) of the outer angle profile (14) fixed, but adjustable. The sliding blocks (26) therefore slide during operation on the adjacent inner angle profile (11) of the outer conductor part. The sliding blocks (26) can be removed from the ladder section after releasing the fixed attachment.

Wie in Fig. 3 ferner dargestellt ist, ist die erste Hohlkörpernase (8) des innenliegenden Winkelprofils (11) des innersten Leiterteils (2) als Aufnahmeraum für ein inneres Kabel (21) ausgebildet, das mithin umfassend gegen Beschädigung geschützt ist.As also shown in Fig. 3, the first hollow body nose (8) of the inner angle profile (11) of the innermost conductor part (2) is designed as a receiving space for an inner cable (21), which is therefore comprehensively protected against damage.

Die einzelnen Leiterteile (2) laufen auf Kopfrollen (24), wobei eine strichliert in Fig. 3 dargestellt ist. Hierbei dient die Unterseite des horizontalen glatten Schenkels (2O) des untenliegenden Winkelprofils (18) als Stütz- oder Lauffläche für die Kopfrolle (24).The individual conductor parts (2) run on top rollers (24), one of which is shown in broken lines in FIG. 3. The underside of the horizontal smooth leg (20) of the angle profile (18) below serves as a support or running surface for the top roller (24).

Für eine größere Verstärkung des Untergurts (4) bzw. Leiterholms kann ferner ein weiteres Winkelprofil (22) mit glatten Schenkeln im Inneren des Haupthohlraums (1O) in aufgenommener Weise verschweißt sein, um zusätzliche Teilhohlräume zu schaffen sowie die Einrollsicke (17) zu überbrücken. Der Vertikalschenkel (23) des weiteren Winkelprofils (22) stößt hierbei an den horizontalen Schenkel (2O) des untenliegenden Winkelprofils (18) stabilisierend an, um letztgenannten Schenkel (2O) zusätzlich zu verstärken, dessen Unterseite als Lauffläche für die zugeordnete Kopfrolle (24) dient. Die Anordnung des weiteren Winkelprofils (22) im Holm sowie die Montage der einzelnen Bauelemente ergibt sich insbesondere aus Fig. 4. In dieser Figur sind die Einzelelemente in einer Stirnansicht sowie perspektivisch gezeigt in einer Weise, wie sie in Modulbauweise zum fertigen Leiterteil zusammengeschweißt werden. Von großer Bedeutung ist die Anbringung der Schweißnaht (31) im oberen Bereich des Holms, damit das Leiterteil durch den Schrumpfvorgang der Schweißung eine erwünschte Bombierung erhält und somit Richtarbeiten entfallen. Zwischen den Diagonalstreben (6) sind an der zweiten Hohlkörpernase (9) in Längsrichtung einzelne Heftschweißungsstellen (27) gesetzt, um bei hoher Beanspruchung ein Ausweichen der zweiten Hohlkörpernase (9) zu verhindern.For a greater reinforcement of the lower flange (4) or ladder stile, a further angle profile (22) with smooth legs inside the main cavity (10) can be welded in an accommodated manner in order to create additional partial cavities and to bridge the curling bead (17). The vertical leg (23) of the further angle profile (22) abuts the horizontal leg (2O) of the underlying angle profile (18) in a stabilizing manner in order to additionally reinforce the latter leg (2O), the underside of which acts as a running surface for the associated top roller (24). serves. The arrangement of the further angle profile (22) in the spar and the Assembly of the individual components results in particular from FIG. 4. In this figure, the individual elements are shown in an end view and in perspective in a manner such that they are welded together in modular construction to form the finished conductor part. The attachment of the weld seam (31) in the upper region of the spar is of great importance, so that the conductor part is given a desired crowning by the shrinking process of the weld and thus straightening work is unnecessary. Between the diagonal struts (6), individual tack weld points (27) are placed in the longitudinal direction on the second hollow body nose (9) in order to prevent the second hollow body nose (9) from evading under high stress.

Claims (10)

  1. A ladder arrangement (1) with extendable ladder parts (2), especially a fire ladder, the individual ladder parts (2) comprising bottom elongate members (4) and top elongate members (5), which are permanently interconnected by struts (6), and the bottom elongate member (4), which in total cross-section is a closed body having at least three cavities (8, 9, 10), comprises three individual components welded together, i.e. an inner angle member (11) having a vertical portion (13) and a horizontal portion (12), an outer angle member (14) having a vertical portion (16) and a horizontal portion (15) and welded to the inner angle member (11), and a bottom angle member (15) having a planar vertical portion (19) welded at the underside to or near the root of the inner angle member (11), and having a horizontally outwardly extending planar portion (20), the free end of which is welded to the bottom free end of the vertical portion (16) of the outer angle member (14), thus forming a main-member cavity (10) in the bottom elongate member (4), characterised in that the free ends of the horizontal portion (12) and the vertical portion (13) of the inner angle member (11) are formed into a first, upwardly-extending, hollow-member projection (8) and a second, inwardly-extending, hollow-member projection (9), the horizontal portion (15) of the outer angle member (14) is welded to the inner angle member (11) in the region of the second hollow-member projection (9), the second hollow-member projection (9) extending to a higher position than the horizontal portion (15) of the outer angle member (14), and the vertical portion (16) of the outer angle member (14) has an outwardly rolled-up bead (17).
  2. A ladder arrangement according to claim 1, characterised in that a first and/or second hollow-member projection (8 or 9) on the inner angle member (11) is or are given the form of a cavity for holding a cable (21).
  3. A ladder arrangement according to claim 1 or 2, characterised in that the bottom elongate member (4) is reinforced by at least one additional welded inner angle member (22) having a planar vertical portion (23) which bridges the bead (17) and the underside of which adjoins the horizontal portion (20) of the bottom angle member (18).
  4. A ladder arrangement according to any one of claims 1 to 3, characterised in that the underside of the horizontal portion (20) of the bottom angle member (18) is constructed as a supporting surface for a head roller (24) which is rotatably mounted on the underneath of a ladder part (2).
  5. A ladder arrangement according to any one of claims 1 to 4, characterised in that horizontal rungs (7) between the bottom elongate members (4) are welded to the underside of the horizontal portion (12), including the first projection (8), of the inner angle member (11).
  6. A ladder arrangement according to any one of claims 1 to 5, characterised in that diagonal struts (6) are provided between the bottom elongate member (4) and the top elongate member (5) and are welded on the underside to the vertical outer surface of the vertical portion (13), including the second projection (9), of the inner angle member (11).
  7. A ladder arrangement according to any one of claims 1 to 6, characterised in that the inner angle member (11) is constructed as a sliding surface and force absorber in the vertical and horizontal direction for an inner ladder part (2).
  8. A ladder arrangement according to any one of claims 1 to 7, characterised in that adjustable forwardly dismountable sliding blocks (25), permanently mounted on the inner angle member (11) in the front region of a ladder part (2), are provided with a small lateral contact surface (28) for lateral guidance and a large contact surface for an upwardly directed force exerted by an inner ladder part (2).
  9. A ladder arrangement according to any one of claims 1 to 8, characterised in that adjustable, backwardly removable sliding blocks (26) permanently mounted on the bead (17) in the rear region of a ladder part (2) are provided for vertical and horizontal guidance in an outer ladder part (2).
  10. A ladder arrangement according to any one of claims 1 to 9, characterised in that the first and/or the second hollow-member projection (8 or 9) has one or more tack-welding places (27) in the region between adjacent rungs (7) or in the region between adjacent diagonal struts (6).
EP87105389A 1986-04-26 1987-04-11 Ladder arrangement with extendable ladder sections, particularly a fire ladder Expired - Lifetime EP0244668B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87105389T ATE63603T1 (en) 1986-04-26 1987-04-11 LADDER ARRANGEMENT WITH EXTENSIBLE LADDER PARTS, IN PARTICULAR FIREFIGHTER LADDER.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3614266 1986-04-26
DE3614266 1986-04-26
DE3625298 1986-07-25
DE19863625298 DE3625298A1 (en) 1986-04-26 1986-07-25 LADDER ARRANGEMENT WITH EXTENDABLE LADDER PARTS, ESPECIALLY FIREFIGHTER LADDERS

Publications (3)

Publication Number Publication Date
EP0244668A2 EP0244668A2 (en) 1987-11-11
EP0244668A3 EP0244668A3 (en) 1988-08-17
EP0244668B1 true EP0244668B1 (en) 1991-05-15

Family

ID=25843275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87105389A Expired - Lifetime EP0244668B1 (en) 1986-04-26 1987-04-11 Ladder arrangement with extendable ladder sections, particularly a fire ladder

Country Status (3)

Country Link
EP (1) EP0244668B1 (en)
JP (1) JPH07103761B2 (en)
DE (2) DE3625298A1 (en)

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US9579530B2 (en) 2014-11-24 2017-02-28 Oshkosh Corporation Ladder assembly for a fire apparatus
US9580962B2 (en) 2014-11-24 2017-02-28 Oshkosh Corporation Outrigger assembly for a fire apparatus
US9580960B2 (en) 2014-11-24 2017-02-28 Oshkosh Corporation Aerial ladder for a fire apparatus

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DE19738886A1 (en) * 1997-09-05 1999-03-11 Iveco Magirus Ladder set for fire ladders
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CN104653095B (en) * 2015-01-23 2017-05-24 徐毓艺 Upright serially-connected high-voltage line maintaining ladder
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CN104747067B (en) * 2015-02-24 2017-05-17 湖南瑭桥科技发展有限公司 Firefighting vertical ladder
US10286239B2 (en) 2017-02-08 2019-05-14 Oshkosh Corporation Fire apparatus piercing tip ranging and alignment system
CN108194019B (en) * 2017-12-28 2019-03-15 湖北宇瑞建筑工程有限公司 A kind of Construction Safety folding ladder
CN108194017B (en) * 2018-01-10 2019-05-24 山东翔晟电力工程有限公司 A kind of combined multifunctional electric power overhaul device
US10472889B1 (en) * 2018-04-23 2019-11-12 Oshkosh Corporation Aerial ladder assembly
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DE3326644A1 (en) * 1983-07-23 1985-01-31 Iveco Magirus AG, 7900 Ulm FIREFIGHTER LADDER WITH EXTENDABLE LADDER PARTS

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US9492695B2 (en) 2014-11-24 2016-11-15 Oshkosh Corporation Pedestal and torque box assembly for a fire apparatus
US9504863B2 (en) 2014-11-24 2016-11-29 Oshkosh Corporation Quint configuration fire apparatus
US9579530B2 (en) 2014-11-24 2017-02-28 Oshkosh Corporation Ladder assembly for a fire apparatus
US9580962B2 (en) 2014-11-24 2017-02-28 Oshkosh Corporation Outrigger assembly for a fire apparatus
US9580960B2 (en) 2014-11-24 2017-02-28 Oshkosh Corporation Aerial ladder for a fire apparatus
US9597536B1 (en) 2014-11-24 2017-03-21 Oshkosh Corporation Quint configuration fire apparatus

Also Published As

Publication number Publication date
DE3770044D1 (en) 1991-06-20
JPS62260985A (en) 1987-11-13
EP0244668A3 (en) 1988-08-17
DE3625298A1 (en) 1987-10-29
JPH07103761B2 (en) 1995-11-08
EP0244668A2 (en) 1987-11-11

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