EP1028225B1 - Ladder - Google Patents

Ladder Download PDF

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Publication number
EP1028225B1
EP1028225B1 EP00102009A EP00102009A EP1028225B1 EP 1028225 B1 EP1028225 B1 EP 1028225B1 EP 00102009 A EP00102009 A EP 00102009A EP 00102009 A EP00102009 A EP 00102009A EP 1028225 B1 EP1028225 B1 EP 1028225B1
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EP
European Patent Office
Prior art keywords
rungs
locking
ladder according
rung
ladder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00102009A
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German (de)
French (fr)
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EP1028225A3 (en
EP1028225A2 (en
Inventor
Victor Krause
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guenzburger Steigtechnik Munk GmbH
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Guenzburger Steigtechnik Munk GmbH
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Publication of EP1028225A2 publication Critical patent/EP1028225A2/en
Publication of EP1028225A3 publication Critical patent/EP1028225A3/en
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Publication of EP1028225B1 publication Critical patent/EP1028225B1/en
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads
    • E06C7/082—Connections between rungs or treads and longitudinal members
    • E06C7/086—Connections between rungs or treads and longitudinal members with a connecting piece inserted in a hollow rung

Definitions

  • the invention relates to a ladder with hollow profiles existing spars and rungs, the spars with the Recesses associated with rungs are provided and wherein the rungs are connected to the uprights by means of detents he follows.
  • a ladder of this type is known from DE 7729785U.
  • each on the inside of the outer wall of a spar upcoming end of the rungs one from the outside via one assigned recess of the outer wall of the assigned Holms insertable connector that engages with in associated Locking recesses of the rungs snap-in locking projections is provided and a rear, on the outside of the The outer wall of the associated spar can be brought into contact Has stop head.
  • the rung-spar connection created with these measures advantageously comes with a Snap connection off. This makes it easy to achieve a high one Accuracy and strength. Because the sprouts with their Ends on the inside of the associated side wall press, can be a tight system in an advantageous manner and thus achieve good dimensional stability and any kind of Prevent lots. At the same time, this ensures that the connector without any loss of overall strength at the rear can be open, so that in the plug from the outside Blocking element for blocking the locking projections in the Rest position is insertable. This also makes it reliable Disengagement of the locking projections guaranteed in the locking position. With the measures according to the invention is therefore the beginning task in a very simple and inexpensive way solved.
  • Another advantageous measure can be that the channel delimited by the engaging connector of the plug at the rear is open and insertable from the outside, the locking projections blocking in the position assigned to the engagement position Picks up a locking element.
  • the mandrel from one to the stop head of the Plug adjustable head stick out and at least in front one with the inner end of the engaging connector of the connector have engaging detent tooth.
  • the overarching measures can be taken on the ends of the rungs can each be drawn up a sleeve whose Coat reaches through the inner wall of the associated spar and one on the end of the rung or the inside of the outer one Holmwand brings inner ring that can be brought into contact with the one Plug assigned through recess includes.
  • the called inner ring practically forms a shim between Rung and spar, due to its elasticity length tolerances the sprouts can compensate for what the manufacture simplified.
  • the insert element can be thickened in a wedge shape so that the rungs be advantageously cut to length at a right angle can, which facilitates the production of step ladders etc.
  • the main fields of application of the present invention are Plastic ladders with sections of glass fiber reinforced Plastic existing hollow profiles made spars and Sprouts.
  • the general structure of ladders with two side Holmen and these connecting rungs are known per se. In Figures 1 to 3 is therefore only one mutual area of engagement between a spar 1 and one Section 2 containing rung shown.
  • the walls 3, 4 of the hollow section forming the spar 1 are as Figure 1 reveals associated with the rungs 2 Recesses 5, 6 provided.
  • the configuration of the recess 5 of the inner spar wall 3 corresponds to the outline configuration of the Rungs 2.
  • the configuration of the recess 6 of the outer Spar wall 4 corresponds to the cross-sectional configuration of the channel-shaped cavity 7 of the rungs 2. This will achieved that the rungs 2 through the recess 5 of the inner spar wall 3 performed and with its end face 8 System on which the recess 6 of the outer spar wall 4th comprehensive edge area can be brought.
  • the rungs 2 are in Area between inner and outer spar walls 3, 4 with at least open to cavity 7, here continuous Provide recesses 9 into the inside, i.e.
  • the engagement connector 11 of the plug 12 has one of the Cross-sectional configuration of the channel-shaped cavity 7 of the Rungs 2 corresponding outline configuration.
  • the engagement connector 11 sits in the cavity 7 without play and the recess 6 adjoining this outer spar wall 4.
  • the engagement nozzle 11 is hollow Pipe socket formed, the collar-like from a rear Stops head 13 which extends in the radial direction over the The outer circumference of the engagement nozzle 11 projects like a flange and on the recess 6 of the outer spar wall 4 Edge area can be brought to the system, which means that Insertion movement of the connector 12 is limited.
  • the stop head 13 designed as a circumferential flange is in the Area of its outer edge with one of the spar walls 4 facing, axial projection 14 which is in the form of a molded onto the flange-shaped stop head 13, circumferential collar can be formed. This way there is an axial distance radially within the projection 14 between the outside of the outer spar wall 4 and the Stop head 13.
  • the distance of the contact surface of the projection 14 of the facing locking edge 15 of the locking projections 10 being slightly smaller than the distance between the outside of the outer spar wall 4 and the locking projections 10 associated locking edges 16 of the recesses 9.
  • connector 12 must be interrupted Line is indicated, with appropriate elastic deformation of the flange forming the stop head 13 as far as in the rung-side cavity 7 that its Locking projections 10 into the assigned locking recesses 9 can snap.
  • the deformed stop head exerted restoring force causes the locking projections with their locking edges 15 in a reliable system to the counter flanks on the rungs are held.
  • stop head 13 acts as a pressure spring compensates for any tolerances.
  • the locking projections 10 are inclined Rising edges 17 provided when inserting on the edge of Start recess 6 of the outer spar wall 4 and the axial Insertion movement into a radial movement of the locking projections 10 implement.
  • they are assigned to each Spring tongue 18 added to the inside of the cavity of the associated engagement nozzle 11 can evade.
  • the Spring tongue 18 is U-shaped by a comprehensive Slot 19 made. It is sufficient if the engagement nozzle 11 with is equipped with a locking projection.
  • the Locking member 20 includes one from the rear Retaining head 21 protruding mandrel 22, which from the outside in the channel-shaped cavity of the engagement socket 11 of the plug 12 can be introduced.
  • the outline configuration of the mandrel 22 corresponds the cross sectional configuration of the cavity of the Engagement stub 11 of the plug 12, so that there is no play Seat results.
  • the rear holding head 11 forms one rear stop, which is attached to the stop head 13 of the Connector 12 creates. Accordingly, this is with one rear, flat contact surface 23 provided with a flat stop surface of the holding head 21 cooperates.
  • the Plug 12 is in the area of the stop head 11 with a Cross section of the cavity of the engagement nozzle 11 corresponding recess 24 provided that practically one Access to the cavity of the engagement nozzle 11 forms, so that the Mandrel 22 can be inserted.
  • the locking member 20 is locked with the plug 12 and so held in place.
  • the mandrel is 22nd so long that it has its front end out of the Engagement sleeve 11 protrudes.
  • a ratchet tooth 25 which adjoins the adjacent one Engages behind the end face of the engagement nozzle 11.
  • the mandrel 22 is formed as a hollow pipe socket, so that the Locking tooth 25 is a spring tongue 26 molded onto the mandrel 22 can be assigned.
  • the Mandrel 22 In the area of the holding head 21, the Mandrel 22 must be closed.
  • the holding head 21 can therefore be used as a plate be formed, from which the mandrel 22 protrudes. It is useful the plate forming the holding head 21 here on the rear circumferentially chamfered like the stop head 13 of the arrangement according to FIG. 1.
  • the embodiment according to FIG. 3 also corresponds in terms of its basic structure of the arrangement according to Figure 1, whereupon Can be referenced.
  • the difference here is that the Rungs 2 with their end face 8 not directly on the inside the outer spar wall 4 but under Interposition of an insert element 27, the length tolerances can compensate.
  • a sleeve 28 is attached to each end of the rungs 2.
  • a Locking between the sleeve 28 and rung 2 is not required.
  • the size the recess 5 of the inner spar wall 3 is accordingly adapted to the outline configuration of the sleeve 28.
  • the sleeve 28 is until her sleeve bottom runs up onto the rung end attached to rung 2.
  • the bottom of the sleeve lies on the Inside of the outer spar wall 4 and is with one Engagement connector 11 associated with the connector 12 Push-through recess 29 provided.
  • the sleeve bottom therefore only corresponds to one on the jacket of the sleeve kind of an inner flange connecting ring.
  • This ring forms the above-mentioned shim 27 between the outer Spar wall 4 and the rung 2, which are accordingly not here directly, but indirectly with the interposition of the Insert element 27 is present on the outer side wall 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

The ladder is formed by hollow profiles for the sides (1) and the rungs (2), both fitted with openings (5,6). A plug (12) is inserted through the opening (6) in the outer wall (4) of the ladder side profile (1) into the rung. The plug (12) has at least one ratchet projection (10) to lock into a recess (9) at the rung, to key the rung to the side profile of the ladder. The plug has a beating head (13) at the outside, to force the plug home and lock the rung and side profile together. The ladder sections (1,2) are of a plastics material reinforced with glass fibers. The plug (12) is an injection molded thermoplastic component.

Description

Die Erfindung betrifft eine Leiter mit aus Hohlprofilen bestehenden Holmen und Sprossen, wobei die Holme mit den Sprossen zugeordneten Ausnehmungen versehen sind und wobei die Verbindung der Sprossen mit den Holmen durch Rastung erfolgt.The invention relates to a ladder with hollow profiles existing spars and rungs, the spars with the Recesses associated with rungs are provided and wherein the rungs are connected to the uprights by means of detents he follows.

Eine leiter dieser Art ist aus der DE 7729785U bekannt.A ladder of this type is known from DE 7729785U.

Eine weitere Leiter dieser Art ist aus der EP 0 330 098 B1 bekannt. Bei dieser bekannten Anordnung sind in die Ausnehmungen der Holme von außen einführbare Buchsen vorgesehen, in die jeweils das zugeordnete Ende einer Sprosse von innen einführbar ist. Die Buchsen sind dabei an den Holmen durch eine formschlüssige Rastverbindung festgelegt. Die Sprossen ihrerseits werden ebenfalls durch eine formschlüssige Rastverbindung in den Buchsen festgelegt. Pro Sprosse-Holm-Verbindung ergeben sich dementsprechend zwei Rastverbindungen, nämlich Buchse-Holm und Buchse-Sprosse. Es kann daher sehr leicht zu Montagefehlern sowie zu einer für die erzielbare Wackelsicherheit und Haltbarkeit ungünstigen Addition von Toleranzen kommen. Eine Einrichtung zum Ausgleich von Toleranzen ist bei der bekannten Anordnung nicht vorgesehen. Ein weiterer Nachteil der bekannten Anordnung ist darin zu sehen, dass hier die Rastverbindungen nicht gegen Öffnen gesichert bzw. zwangsweise eingerastet werden können, da die Buchse im Bereich zwischen der Außen- und Innenwand des zugeordneten Holms nicht zugänglich ist. und im Bereich des rückwärtigen, durch die Sprosse beanspruchten Hülsenbodens zur Vermeidung von Labilität geschlossen sein muss. Die bekannte Anordnung erweist sich dementsprechend als nicht sicher und zuverlässig genug.Another conductor of this type is known from EP 0 330 098 B1. at this known arrangement are in the recesses of the Spars provided from the outside insertable bushings into each the associated end of a rung can be inserted from the inside. The Bushings are on the spars by a positive Snap connection established. The sprouts in turn become also by a positive locking connection in the Bushings set. This results in a rung-spar connection accordingly two locking connections, namely socket-spar and socket rung. It can therefore be very easy Assembly errors as well as one for the achievable wobble security and durability unfavorable addition of tolerances come. A facility to compensate for tolerances is at known arrangement not provided. Another disadvantage of known arrangement can be seen in the fact that here the Snap connections not secured against opening or forced can be snapped into place because the socket is in the area between the outer and inner wall of the associated spar is not is accessible. and in the area of the rear through which Shoot stressed sleeve bottom to avoid Lability must be closed. The known arrangement proves accordingly prove to be unsafe and reliable enough.

Hiervon ausgehend ist es daher die Aufgabe der vorliegenden Erfindung, eine Anordnung eingangs erwähnter Art mit einfachen und kostengünstigen Mitteln so zu verbessern, dass eine hohe Sicherheit und Zuverlässigkeit erreichbar sind.Based on this, it is therefore the task of the present one Invention, an arrangement of the type mentioned with simple and cost effective means to improve that high Security and reliability are achievable.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass in jedes an der Innenseite der Außenwand jeweils eines Holms anstehende Ende der Sprossen ein von außen über eine zugeordnete Ausnehmung der Außenwand des zugeordneten Holms einführbarer Stecker eingreift, der mit in zugeordnete Rastausnehmungen der Sprossen einrastbaren Rastvorsprüngen versehen ist und einen rückwärtigen, an der Außenseite der Außenwand des zugeordneten Holms zur Anlage bringbaren Anschlagkopf aufweist. This object is achieved in that each on the inside of the outer wall of a spar upcoming end of the rungs one from the outside via one assigned recess of the outer wall of the assigned Holms insertable connector that engages with in associated Locking recesses of the rungs snap-in locking projections is provided and a rear, on the outside of the The outer wall of the associated spar can be brought into contact Has stop head.

Die mit diesen Maßnahmen geschaffene Sprossen-Holm-Verbindung kommt in vorteilhafter Weise mit einer Rastverbindung aus. Dies erleichtert die Erzielung einer hohen Genauigkeit und Festigkeit. Dadurch, dass die Sprossen mit ihren Enden auf die Innenseite der zugeordneten Holmaußenwand drücken, lassen sich in vorteilhafter Weise eine stramme Anlage und damit eine gute Formstabilität erreichen und jede Art von Lose verhindern. Gleichzeitig wird hierdurch sichergestellt, dass der Stecker ohne jede Einbuse an Gesamtfestigkeit rückwärtig offen sein kann, so dass in den Stecker von außen ein Blockierelement zum Blockieren der Rastvorsprünge in der Raststellung einführbar ist. Hierdurch wird auch eine zuverlässige Ausrückung der Rastvorsprünge in die Raststellung gewährleistet. Mit den erfindungsgemäßen Maßnahmen wird daher die eingangs gestellte Aufgabe auf höchst einfache und kostengünstige Weise gelöst.The rung-spar connection created with these measures advantageously comes with a Snap connection off. This makes it easy to achieve a high one Accuracy and strength. Because the sprouts with their Ends on the inside of the associated side wall press, can be a tight system in an advantageous manner and thus achieve good dimensional stability and any kind of Prevent lots. At the same time, this ensures that the connector without any loss of overall strength at the rear can be open, so that in the plug from the outside Blocking element for blocking the locking projections in the Rest position is insertable. This also makes it reliable Disengagement of the locking projections guaranteed in the locking position. With the measures according to the invention is therefore the beginning task in a very simple and inexpensive way solved.

Vorteilhafte Ausgestaltungen und zweckmäßige Fortbildungen der übergeordneten Maßnahmen sind in den Unteransprüchen angegeben. So kann der zweckmäßig als umlaufender Flansch ausgebildete Anschlagkopf des Steckers in vorteilhafter Weise im Bereich seines radial äußeren Rands mit einem dem zugeordneten Holm zugewandten, zweckmäßig durch einen umlaufenden Bund gebildeten Vorsprung versehen sein. Dieser ermöglicht in vorteilhafter Weise eine elastische Verformung des flanschförmigen Anschlagkopfes und damit die Erzielung einer von diesem ausgeübten, nach außen gerichteten Federkraft. Durch diese Federkraft werden die Rastvorsprünge in vorgespannter Anlage an den zugeordneten Widerlagerflächen der Rastausnehmungen gehalten, so dass auch im Falle größerer Herstellungstoleranzen ein spielfreier Rastverschluß und damit eine besonders hohe Zuverlässigkeit und Sicherheit erreicht werden.Advantageous refinements and practical training of overriding measures are in the subclaims specified. So it can be useful as a circumferential flange trained stop head of the plug in an advantageous manner Area of its radially outer edge with one assigned to it Spar facing, expediently by an all-round waistband formed projection be provided. This enables in advantageously an elastic deformation of the flange-shaped stop head and thus achieving one from this exerted, outward spring force. By this spring force, the locking projections are in prestressed system on the assigned abutment surfaces of the Retaining recesses held so that even in the case of larger ones Manufacturing tolerances a play-free snap lock and thus achieved a particularly high level of reliability and security become.

Eine weitere vorteilhafte Maßnahmen kann darin bestehen, dass der vom Eingriffsstutzen des Steckers begrenzte Kanal rückwärtig offen ist und einen von außen einsteckbaren, die Rastvorsprünge in der der Eingriffstellung zugeordneten Position blockierenden Dorn eines Verriegelungselements aufnimmt. Diese Maßnahmen ergeben auf höchst einfache Weise die oben schon erwähnte Verriegelung der Rastverbindung.Another advantageous measure can be that the channel delimited by the engaging connector of the plug at the rear is open and insertable from the outside, the locking projections blocking in the position assigned to the engagement position Picks up a locking element. These measures result in the most simple way the already mentioned above Locking the locking connection.

Zweckmäßig kann der Dorn von einem an den Anschlagkopf des Steckers anstellbaren Haltekopf abstehen und vorne wenigstens einen mit dem inneren Ende des Eingriffsstutzen des Steckers zum Eingriff bringbaren Rastzahn aufweisen. Diese Maßnahmen ergeben eine einfache Halterung des Verriegelungsorgans. Die hierzu vorgesehene Rastverbindung ist in vorteilhafter Weise am Kraftfluss zwischen Sprosse und Holm nicht beteiligt und ist daher der übergeordneten Lösung nicht abträglich.Appropriately, the mandrel from one to the stop head of the Plug adjustable head stick out and at least in front one with the inner end of the engaging connector of the connector have engaging detent tooth. These measures result in a simple mounting of the locking member. The provided latching connection is in an advantageous manner on Power flow between rung and spar is not involved and is therefore not detrimental to the overall solution.

In weiterer Fortbildung der übergeordneten Maßnahmen kann auf die Enden der Sprossen jeweils eine Hülse aufziehbar sein, deren Mantel die innere Wand des zugeordneten Holms durchgreift und einen an der Sprossenstirnseite bzw. der Innenseite der äußeren Holmwand zur Anlage bringbaren Innenring trägt, der eine dem Stecker zugeordnete Durchsteckausnehmung umfaßt. Der genannte Innenring bildet praktisch ein Beilagelement zwischen Sprosse und Holm, das in Folge seiner Elastizität LängenToleranzen der Sprossen ausgleichen kann, was die Herstellung vereinfacht. Bei Leitern mit seitlich ausgestellten Holmen kann das Beilageelement keilförmig verdickt sein, so dass die Sprossen in vorteilhafter Weise unter einem rechten Winkel abgelängt sein können, was die Herstellung von Stehleitern etc. erleichtert.In further training the overarching measures can be taken on the ends of the rungs can each be drawn up a sleeve whose Coat reaches through the inner wall of the associated spar and one on the end of the rung or the inside of the outer one Holmwand brings inner ring that can be brought into contact with the one Plug assigned through recess includes. The called inner ring practically forms a shim between Rung and spar, due to its elasticity length tolerances the sprouts can compensate for what the manufacture simplified. For ladders with laterally flared bars the insert element can be thickened in a wedge shape so that the rungs be advantageously cut to length at a right angle can, which facilitates the production of step ladders etc.

Weitere vorteilhafte Ausgestaltungen und zweckmäßige Fortbildungen der übergeordneten Maßnahmen sind in den restlichen Unteransprüchen angegeben und aus der nachstehenden Beispielsbeschreibung anhand der Zeichnung näher entnehmbar.Further advantageous configurations and expedient Further training of the overarching measures are in the remaining subclaims specified and from the Example description below using the drawing removable.

In der nachstehend beschriebenen Zeichnung zeigen:

Figur 1
einen Schnitt durch eine erfindungsgemäße Sprossen-Holm-Verbindung mit einem mit Rastvorsprüngen versehenen Stecker,
Figur 2
eine Variation der Anordnung gemäß Figur 1 mit einem dem Stecker zugeordneten Verriegelungsorgan und
Figur 3
eine weitere Variation der Anordnungen gemäß Figuren 1 oder 2 mit einem zwischen Sprossenende und äußerer Holmwand vorgesehenen Beilagelement.
In the drawing described below:
Figure 1
2 shows a section through a rung-spar connection according to the invention with a plug provided with locking projections,
Figure 2
a variation of the arrangement of Figure 1 with a locking member associated with the connector and
Figure 3
a further variation of the arrangements according to Figures 1 or 2 with a shim provided between the end of the rung and the outer spar wall.

Hauptanwendungsgebiet der vorliegenden Erfindung sind Kunststoffleitern mit als Abschnitte von aus glasfaserverstärktem Kunststoff bestehenden Hohlprofilen hergestellten Holmen und Sprossen. Der allgemeine Aufbau von Leitern mit zwei seitlichen Holmen und diese verbindenden Sprossen ist an sich bekannt. In den Figuren 1 bis 3 ist daher jeweils lediglich ein einen gegenseitigen Eingriffsbereich zwischen einem Holm 1 und einer Sprosse 2 enthaltender Ausschnitt dargestellt.The main fields of application of the present invention are Plastic ladders with sections of glass fiber reinforced Plastic existing hollow profiles made spars and Sprouts. The general structure of ladders with two side Holmen and these connecting rungs are known per se. In Figures 1 to 3 is therefore only one mutual area of engagement between a spar 1 and one Section 2 containing rung shown.

Die Wände 3, 4 des den Holm 1 bildenden Hohlprofils sind, wie Figur 1 erkennen läßt, mit den Sprossen 2 zugeordneten Ausnehmungen 5, 6 versehen. Die Konfiguration der Ausnehmung 5 der inneren Holmwand 3 entspricht der Umrißkonfiguration der Sprossen 2. Die Konfiguration der Ausnehmung 6 der äußeren Holmwand 4 entspricht der Querschnittskonfiguration des kanalförmigen Hohlraums 7 der Sprossen 2. Hierdurch wird erreicht, dass die Sprossen 2 durch die Ausnehmung 5 der inneren Holmwand 3 durchgeführt und mit ihrer Stirnseite 8 zur Anlage an den die Ausnehmung 6 der äußeren Holmwand 4 umfassenden Randbereich bringbar sind. Die Sprossen 2 sind im Bereich zwischen innerer und äußerer Holmwand 3, 4 mit zumindest zum Hohlraum 7 hin offenen, hier durchgehenden Rastausnehmungen 9 versehen, in die von innen, d.h. vom Hohlraum 7 her jeweils ein zugeordneter Rastvorsprung 10 eines von außen, d.h. von der Holmaußenseite her, über die Ausnehmung 6 der äußeren Holmwand 4 in den Hohlraum 7 der Sprosse 2 einführbaren Eingriffsstutzens 11 eines als Ganzes mit 12 bezeichneten Steckers einrastbar ist. Durch diese Rastverbindung wird die Sprosse 2 mit ihrer Stirnseite 8 in Anlage an der Innenseite der äußeren Holmwand 4 gehalten.The walls 3, 4 of the hollow section forming the spar 1 are as Figure 1 reveals associated with the rungs 2 Recesses 5, 6 provided. The configuration of the recess 5 of the inner spar wall 3 corresponds to the outline configuration of the Rungs 2. The configuration of the recess 6 of the outer Spar wall 4 corresponds to the cross-sectional configuration of the channel-shaped cavity 7 of the rungs 2. This will achieved that the rungs 2 through the recess 5 of the inner spar wall 3 performed and with its end face 8 System on which the recess 6 of the outer spar wall 4th comprehensive edge area can be brought. The rungs 2 are in Area between inner and outer spar walls 3, 4 with at least open to cavity 7, here continuous Provide recesses 9 into the inside, i.e. from Cavity 7 ago each have an associated locking projection 10 from outside, i.e. from the spar outside, over the Recess 6 of the outer spar wall 4 in the cavity 7 of the Rung 2 insertable engagement piece 11 with a whole 12 designated plug is clickable. Through this The end of the rung 8 is in contact with the rung 2 held on the inside of the outer spar wall 4.

Der Eingriffsstutzen 11 des Steckers 12 besitzt eine der Querschnittskonfiguration des kanalförmigen Hohlraums 7 der Sprossen 2 entsprechende Umrisskonfiguration. Der Eingriffsstutzen 11 sitzt dementsprechend spielfrei im Hohlraum 7 und der an diesen sich anschließenden Ausnehmung 6 der äußeren Holmwand 4. Der Eingriffsstutzen 11 ist als hohler Rohrstutzen ausgebildet, der kragenartig von einem rückwärtigen Anschlagkopf 13 absteht, der in radialer Richtung über den Außenumfang des Eingriffsstutzens 11 flanschartig auskragt und am die Ausnehmung 6 der äußeren Holmwand 4 umfassenden Randbereich zur Anlage bringbar ist, wodurch die Einschubbewegung des Steckers 12 begrenzt wird.The engagement connector 11 of the plug 12 has one of the Cross-sectional configuration of the channel-shaped cavity 7 of the Rungs 2 corresponding outline configuration. The Accordingly, the engagement connector 11 sits in the cavity 7 without play and the recess 6 adjoining this outer spar wall 4. The engagement nozzle 11 is hollow Pipe socket formed, the collar-like from a rear Stops head 13 which extends in the radial direction over the The outer circumference of the engagement nozzle 11 projects like a flange and on the recess 6 of the outer spar wall 4 Edge area can be brought to the system, which means that Insertion movement of the connector 12 is limited.

Der als umlaufender Flansch ausgebildete Anschlagkopf 13 ist im Bereich seines äußeren Rands mit einem der Holmwand 4 zugewandten, axialen Vorsprung 14 versehen, der in Form eines an den flanschförmigen Anschlagkopf 13 angeformten, umlaufenden Bunds ausgebildet sein kann. Auf diese Weise ergibt sich radial innerhalb des Vorsprungs 14 ein axialer Abstand zwischen der Außenseite der äußeren Holmwand 4 und dem Anschlagkopf 13. Der Abstand der Anlagefläche des Vorsprungs 14 von der zugewandten Sperrflanke 15 der Rastvorsprünge 10 ist dabei etwas kleiner als der Abstand zwischen der Außenseite der äußeren Holmwand 4 und den den Rastvorsprüngen 10 zugeordneten Sperrflanken 16 der Rastausnehmungen 9. Der Stecker 12 muß dementsprechend, wie durch eine unterbrochene Linie angedeutet ist, unter entsprechender elastischer Verformung des den Anschlagkopf 13 bildenden Flansches soweit in den sprossenseitigen Hohlraum 7 eingedrückt werden, dass seine Rastvorsprünge 10 in die zugeordneten Rastausnehmungen 9 einschnappen können. Die vom verformten Anschlagkopf ausgeübte Rückstellkraft bewirkt, dass die Rastvorsprünge mit ihren Sperrflanken 15 in zuverlässiger Anlage an den sprossenseitigen Gegenflanken gehalten werden. Der Anschlagkopf 13 fungiert dementsprechend als Anpressfeder, die eventuelle Toleranzen ausgleicht.The stop head 13 designed as a circumferential flange is in the Area of its outer edge with one of the spar walls 4 facing, axial projection 14 which is in the form of a molded onto the flange-shaped stop head 13, circumferential collar can be formed. This way there is an axial distance radially within the projection 14 between the outside of the outer spar wall 4 and the Stop head 13. The distance of the contact surface of the projection 14 of the facing locking edge 15 of the locking projections 10 being slightly smaller than the distance between the outside of the outer spar wall 4 and the locking projections 10 associated locking edges 16 of the recesses 9. The Accordingly, connector 12 must be interrupted Line is indicated, with appropriate elastic deformation of the flange forming the stop head 13 as far as in the rung-side cavity 7 that its Locking projections 10 into the assigned locking recesses 9 can snap. The deformed stop head exerted restoring force causes the locking projections with their locking edges 15 in a reliable system to the counter flanks on the rungs are held. The Accordingly, stop head 13 acts as a pressure spring compensates for any tolerances.

Beim Einführen des Eingriffsstutzens 11 des Steckers 12 in den sprossenseitigen Hohlraum 7 weichen die Rastvorsprünge 10 nach radial innen aus. Die Rastvorsprünge 10 sind hierzu mit schrägen Anlaufflanken 17 versehen, die beim Einführen am Rand der Ausnehmung 6 der äußeren Holmwand 4 anlaufen und die axiale Einführbewegung in eine radiale Bewegung der Rastvorsprünge 10 umsetzen. Diese sind hierzu auf einer jeweils zugeordneten Federzunge 18 aufgenommen, die nach innen in den Hohlraum des zugeordneten Eingriffsstutzens 11 ausweichen kann. Die Federzunge 18 wird durch einen sie umfassenden, U-förmigen Schlitz 19 hergestellt. Es genügt, wenn der Eingriffsstutzen 11 mit einem Rastvorsprung ausgestattet ist. Im dargestellten, bevorzugten Ausführungsbeispiel ist im Bereich jeder Querschnittsseite des hier entsprechend der rechteckförmigen Sprossenkonfiguration rechteckförmigen Eingriffstutzens 11 jeweils ein Rastvorsprung 10 mit zugeordneter Federzunge 18 vorgesehen. Die Sprossen 2 sind dementsprechend im Bereich jeder Querschnittsseite mit einer Rastausnehmung 9 versehen. Dies ergibt einen zuverlässigen, vierfachen Halt.When inserting the engagement connector 11 of the plug 12 in the rung-side cavity 7 give way to the locking projections 10 radially outwards. For this purpose, the locking projections 10 are inclined Rising edges 17 provided when inserting on the edge of Start recess 6 of the outer spar wall 4 and the axial Insertion movement into a radial movement of the locking projections 10 implement. For this purpose, they are assigned to each Spring tongue 18 added to the inside of the cavity of the associated engagement nozzle 11 can evade. The Spring tongue 18 is U-shaped by a comprehensive Slot 19 made. It is sufficient if the engagement nozzle 11 with is equipped with a locking projection. In the illustrated preferred embodiment is in the range of everyone Cross-sectional side of the here corresponding to the rectangular Rung configuration of rectangular engagement spigot 11 in each case a locking projection 10 with an associated spring tongue 18 intended. The rungs 2 are accordingly in the area each cross-sectional side with a recess 9. This results in a reliable, fourfold hold.

Der grundsätzliche Aufbau der Anordnung gemäß Figur 2 entspricht der oben beschriebenen Anordnung gemäß Figur 1. Nachstehend werden daher lediglich die zusätzlichen Maßnahmen näher beschrieben, wobei für gleichbleibende Teile gleiche Bezugszeichen Verwendung finden.The basic structure of the arrangement according to FIG. 2 corresponds to the arrangement according to FIG. 1 described above. Therefore, only the additional measures are listed below described in more detail, the same for the same parts Find reference numerals.

Bei der Anordnung gemäß Figur 2 ist ein als Ganzes mit 20 bezeichnetes Verriegelungsorgan vorgesehen, mittels dessen die Rastvorsprünge 10 des Steckers 12 in Rastrichtung ausgerückt und in der eingerasteten Stellung gehalten werden können. Das Verriegelungsorgan 20 enthält einen von einem rückwärtigen Haltekopf 21 abstehenden Dorn 22, der von außen in den kanalförmigen Hohlraum des Eingriffsstutzens 11 des Steckers 12 einführbar ist. Die Umrisskonfiguration des Dorns 22 entspricht der Querschnittskonfiguration des Hohlraums des Eingriffsstuzens 11 des Steckers 12, so dass sich ein spielfreier Sitz ergibt. Der rückwärtige Haltekopf 11 bildet einen rückwärtigen Anschlag, der sich an den Anschlagkopf 13 des Steckers 12 anlegt. Dieser ist dementsprechend mit einer rückwärtigen, ebenen Anlagefläche 23 versehen, die mit einer ebenen Anschlagfläche des Haltekopfes 21 zusammenwirkt. Der Stecker 12 ist im Bereich des Anschlagkopfes 11 mit einer dem Querschnitt des Hohlraums des Eingriffsstutzens 11 entsprechenden Ausnehmung 24 versehen, die praktisch einen Zugang zum Hohlraum des Eingriffsstutzens 11 bildet, so dass der Dorn 22 eingeführt werden kann.In the arrangement according to FIG. 2, one as a whole is 20 designated locking member provided, by means of which Locking projections 10 of the connector 12 disengaged in the locking direction and can be held in the locked position. The Locking member 20 includes one from the rear Retaining head 21 protruding mandrel 22, which from the outside in the channel-shaped cavity of the engagement socket 11 of the plug 12 can be introduced. The outline configuration of the mandrel 22 corresponds the cross sectional configuration of the cavity of the Engagement stub 11 of the plug 12, so that there is no play Seat results. The rear holding head 11 forms one rear stop, which is attached to the stop head 13 of the Connector 12 creates. Accordingly, this is with one rear, flat contact surface 23 provided with a flat stop surface of the holding head 21 cooperates. The Plug 12 is in the area of the stop head 11 with a Cross section of the cavity of the engagement nozzle 11 corresponding recess 24 provided that practically one Access to the cavity of the engagement nozzle 11 forms, so that the Mandrel 22 can be inserted.

Das Verriegelungsorgan 20 wird mit dem Stecker 12 verrastet und so in Stellung gehalten. Im dargestellten Beispiel ist der Dorn 22 hierzu so lang, dass er mit seinem vorderen Ende aus dem Eingriffsstutzen 11 herausragt. Im Bereich dieses Endes des Dorns 22 ist ein Rastzahn 25 vorgesehen, der die benachbarte Stirnseite des Eingriffsstutzens 11 hintergreift. Zweckmäßig ist der Dorn 22 als hohler Rohrstutzen ausgebildet, so dass dem Rastzahn 25 eine an den Dorn 22 angeformte Federzunge 26 zugeordnet sein kann. Im Bereich des Haltekopfes 21 kann der Dorn 22 geschlossen sein. Der Haltekopf 21 kann daher als Platte ausgebildet sein, von der der Dorn 22 absteht. Zweckmäßig ist die den Haltekopf 21 bildende Platte hier rückwärtig umfangsseitig angefast, wie der Anschlagkopf 13 der Anordnung gemäß Figur 1.The locking member 20 is locked with the plug 12 and so held in place. In the example shown, the mandrel is 22nd so long that it has its front end out of the Engagement sleeve 11 protrudes. In the area of this end of the Mandrel 22 is provided with a ratchet tooth 25 which adjoins the adjacent one Engages behind the end face of the engagement nozzle 11. Is expedient the mandrel 22 is formed as a hollow pipe socket, so that the Locking tooth 25 is a spring tongue 26 molded onto the mandrel 22 can be assigned. In the area of the holding head 21, the Mandrel 22 must be closed. The holding head 21 can therefore be used as a plate be formed, from which the mandrel 22 protrudes. It is useful the plate forming the holding head 21 here on the rear circumferentially chamfered like the stop head 13 of the arrangement according to FIG. 1.

Auch die Ausführung gemäß Figur 3 entspricht hinsichtlich ihres grundsätzlichen Aufbaus der Anordnung gemäß Figur 1, worauf Bezug genommen werden kann. Unterschiedlich ist hier, dass die Sprossen 2 mit ihrer Stirnseite 8 nicht direkt an der Innenseite der äußeren Holmwand 4 anliegen, sondern unter Zwischenschaltung eines Beilagelements 27, das LängenToleranzen ausgleichen kann. Bei der Anordnung gemäß Figur 3 ist auf jedes Ende der Sprossen 2 eine Hülse 28 aufgesteckt. Eine Rastung zwischen Hülse 28 und Sprosse 2 ist nicht erforderlich. Der praktisch eine Verdickung der Sprosse 2 bildende, diese umfassende Mantel der Hülse 28, der Dicken-Toleranzen ausgleichen kann, durchgreift die innere Holmwand 3. Die Größe der Ausnehmung 5 der inneren Holmwand 3 ist dementsprechend der Umrisskonfiguration der Hülse 28 angepasst. Die Hülse 28 ist bis zum Auflaufen ihres Hülsenbodens auf die Sprossenstirnseite auf die Sprosse 2 aufgesteckt. Der Hülsenboden liegt an der Innenseite der äußeren Holmwand 4 an und ist mit einer dem Eingriffsstutzen 11 des Steckers 12 zugeordneten Durchsteckausnehmung 29 versehen. Der Hülsenboden entspricht daher lediglich einem an den Mantel der Hülse nach Art eines Innenflansches anschließenden Ring. Dieser Ring bildet das oben erwähnte Beilagelement 27 zwischen der äußeren Holmwand 4 und der Sprosse 2, die hier dementsprechend nicht direkt, sondern indirekt unter Zwischenschaltung des Beilagelements 27 an der äußeren Holmwand 4 ansteht.The embodiment according to FIG. 3 also corresponds in terms of its basic structure of the arrangement according to Figure 1, whereupon Can be referenced. The difference here is that the Rungs 2 with their end face 8 not directly on the inside the outer spar wall 4 but under Interposition of an insert element 27, the length tolerances can compensate. In the arrangement according to FIG. 3 a sleeve 28 is attached to each end of the rungs 2. A Locking between the sleeve 28 and rung 2 is not required. The practically a thickening of the rung 2, this comprehensive sleeve 28 sleeve, thickness tolerances can compensate, reaches through the inner spar wall 3. The size the recess 5 of the inner spar wall 3 is accordingly adapted to the outline configuration of the sleeve 28. The sleeve 28 is until her sleeve bottom runs up onto the rung end attached to rung 2. The bottom of the sleeve lies on the Inside of the outer spar wall 4 and is with one Engagement connector 11 associated with the connector 12 Push-through recess 29 provided. The sleeve bottom therefore only corresponds to one on the jacket of the sleeve Kind of an inner flange connecting ring. This ring forms the above-mentioned shim 27 between the outer Spar wall 4 and the rung 2, which are accordingly not here directly, but indirectly with the interposition of the Insert element 27 is present on the outer side wall 4.

Bei Leitern mit seitlich ausgestellten Holmen 1 ist das Beilagelement 27, wie in Figur 3 gezeigt ist, entsprechend dem Spreizwinkel nach unten keilförmig verdickt. Auf diese Weise wird erreicht, dass trotz der Spreizung der Holme 1 die Sprossen 2 rechtwinklig abgelängt werden können, was die Herstellung erleichtert. Selbstverständlich sind dabei auch der Anschlagkopf 13 des Steckers 12 und, sofern ein Verriegelungsorgan 20 vorgesehen ist, auch dessen Haltekopf 21 mit dem Spreizwinkel der Holme 1 entsprechendem Winkel gegenüber der Sprossenachse angestellt.This is the case for ladders with bars 1 on the side Insert element 27, as shown in Figure 3, corresponding to the Spreading angle thickened downwards in a wedge shape. That way achieved that despite the spreading of the spars 1, the rungs 2 can be cut at right angles to what the manufacture facilitated. Of course, the stop head is also included 13 of the connector 12 and, if a locking member 20th is also provided, the holding head 21 with the spreading angle the spars 1 corresponding angle to the Rung axis employed.

Claims (10)

  1. A ladder having side pieces (1) made from hollow structural elements and rungs (2) wherein the side pieces (1) are furnished with recesses (5, 6) corresponding to the rungs (2) and wherein the rungs (2) are secured to the side pieces (1) by means of a snap-on contact
    characterised in that
    a retractable insertion member (12) engages from the outside and through a corresponding recess (6) in the outside wall (4) of the corresponding side piece (1) with the end of the rungs (2) adjacent in each case to the inside of outside wall (4) of the respective side piece (1), and is provided with at least one locking projection (10) for locking into position in a corresponding locking recess (9) of the rung (2) and has an inverted stopping head (13) that may be brought flush with the outside of outside wall (4) of the corresponding side piece (1) in each case.
  2. The ladder according to claim 1,
    characterised in that
    the stopping head (13), which preferably has the form of a rotating flange, is provided in the area of its radially outer edge with a protrusion (14) that is preferably conformed as rotating shoulder facing towards the corresponding side piece (1).
  3. The ladder according to either of the previous claims,
    characterised in that
    the insertion member (12) is provided with a tubular engaging connector (11) that is separated from the stopping head (13) in the manner of a collar and has an external profile matching the internal diameter of the rungs (2), and into which flexible tongues (18) have been incised, and that each locking projection (10) is seated on an associated flexible tongue (18).
  4. The ladder according to claim 3,
    characterised in that
    a flexible tongue (18) with associated locking projection (10) is furnished in the area of each sectional side of the engaging connector (11), and that the rungs (2) are furnished with a locking recess (9) in the area of each sectional side.
  5. The ladder according to any of the previous claims,
    characterised in that
    the channel delimited by the engaging connector (11) of the insertion member (12) is rearwardly open and accommodates a gudgeon (22) of a locking device (20) that is inserted from outside and blocks the locking projections (10) in their engaged position.
  6. The ladder according to claim 5,
    characterised in that
    the. gudgeon (22) is separated in the manner of a collar from a retaining head (21) that is adjustable at the stopping head (13) of the insertion member (12), and in the area of its forward end, which projects out of engaging connector (11), has at least one ratchet tooth (25), which catches behind the adjacent frontal surface of engaging connector (11) and is preferably seated on a flexible tongue (26) that is incised into the gudgeon (22) which has an external profile corresponding with the internal profile of the engaging connector (11).
  7. The ladder according to any of the previous claims,
    characterised in that
    a sleeve (28) is positioned on each of the ends of rungs (2), and the mantle of which penetrates the internal wall (3) of the corresponding side piece (1) and supports an inner ring (27) that is adjustable at the frontal face of the rung (2) or the interior side of the outer side piece wall (4) and that encloses a through-hole (29) corresponding to insertion member (12).
  8. The ladder according to claim 7,
    characterised in that
    in ladders whose side pieces (1) flare outwards the inner ring (27) is conformed in a wedge shape corresponding to the flaring angle.
  9. The ladder according to any of the previous claims,
    characterised in that
    the side pieces (1) and the rungs (2) are made from plastic reinforced with fibreglass.
  10. The ladder according to any of the previous claims,
    characterised in that
    the insertion member (12) and/or the locking device (20) and/or the sleeve (28) is/are each formed from an injection moulded thermoplastic synthetic part.
EP00102009A 1999-02-13 2000-02-02 Ladder Expired - Lifetime EP1028225B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19906142 1999-02-13
DE19906142A DE19906142A1 (en) 1999-02-13 1999-02-13 ladder

Publications (3)

Publication Number Publication Date
EP1028225A2 EP1028225A2 (en) 2000-08-16
EP1028225A3 EP1028225A3 (en) 2001-05-02
EP1028225B1 true EP1028225B1 (en) 2003-04-02

Family

ID=7897469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00102009A Expired - Lifetime EP1028225B1 (en) 1999-02-13 2000-02-02 Ladder

Country Status (3)

Country Link
EP (1) EP1028225B1 (en)
AT (1) ATE236340T1 (en)
DE (2) DE19906142A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023126072A1 (en) * 2021-12-30 2023-07-06 Eaton Intelligent Power Limited Snap plug for cable tray

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2893078B1 (en) * 2005-11-08 2009-01-16 Polymer Trading Sarl KIT FOR REALIZATION BY MOUNTING A SCALE AND LADDER REALIZED BY MOUNTING THE ELEMENTS OF THIS KIT
FR3002584B1 (en) * 2013-02-28 2015-03-20 Cts Cable Tray Systems Sas SYSTEM FOR ASSEMBLING A STEM ON A LONGERON

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Publication number Priority date Publication date Assignee Title
GB1067679A (en) * 1962-11-16 1967-05-03 H C Slingsby Ltd Improvements relating to light ladders
FR2044053A5 (en) * 1969-05-07 1971-02-19 Rigoine De Fougerolle A
US3566992A (en) * 1970-01-12 1971-03-02 Lewis W Berger Ladder
DE7729785U1 (en) * 1977-09-26 1977-12-29 Zarges Leichtbau Gmbh, 8120 Weilheim LADDER
DE3147306C2 (en) * 1981-11-28 1983-10-06 Walter 7120 Bietigheim-Bissingen Kuemmerlin ladder
DE8802330U1 (en) * 1988-02-23 1988-05-11 Zarges Leichtbau Gmbh, 8120 Weilheim, De
US4997061A (en) * 1989-08-08 1991-03-05 Aymes Doniel G Ladder assembly, particularly for use with swimming pools

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023126072A1 (en) * 2021-12-30 2023-07-06 Eaton Intelligent Power Limited Snap plug for cable tray

Also Published As

Publication number Publication date
EP1028225A3 (en) 2001-05-02
DE50001587D1 (en) 2003-05-08
DE19906142A1 (en) 2000-09-07
EP1028225A2 (en) 2000-08-16
ATE236340T1 (en) 2003-04-15

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