[go: up one dir, main page]

EP0964976B1 - Folding ladder - Google Patents

Folding ladder Download PDF

Info

Publication number
EP0964976B1
EP0964976B1 EP98909464A EP98909464A EP0964976B1 EP 0964976 B1 EP0964976 B1 EP 0964976B1 EP 98909464 A EP98909464 A EP 98909464A EP 98909464 A EP98909464 A EP 98909464A EP 0964976 B1 EP0964976 B1 EP 0964976B1
Authority
EP
European Patent Office
Prior art keywords
guide
locking bolt
ladder
folding ladder
socket
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
EP98909464A
Other languages
German (de)
French (fr)
Other versions
EP0964976A1 (en
Inventor
Günther 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.)
Krause Werk GmbH and Co KG
Original Assignee
Krause Werk GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Krause Werk GmbH and Co KG filed Critical Krause Werk GmbH and Co KG
Publication of EP0964976A1 publication Critical patent/EP0964976A1/en
Application granted granted Critical
Publication of EP0964976B1 publication Critical patent/EP0964976B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C1/00Ladders in general
    • E06C1/02Ladders in general with rigid longitudinal member or members
    • E06C1/04Ladders for resting against objects, e.g. walls poles, trees
    • E06C1/08Ladders for resting against objects, e.g. walls poles, trees multi-part
    • E06C1/12Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C1/00Ladders in general
    • E06C1/02Ladders in general with rigid longitudinal member or members
    • E06C1/14Ladders capable of standing by themselves
    • E06C1/16Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/20Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles
    • E06C1/22Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles with extensible, e.g. telescopic, ladder parts or struts
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C1/00Ladders in general
    • E06C1/02Ladders in general with rigid longitudinal member or members
    • E06C1/32Ladders with a strut which is formed as a ladder and can be secured in line with the ladder

Definitions

  • the invention relates to a pull-out ladder, the ladder elements telescopically by means of rails that can be moved on them are extendable, the spars in several Positions on the associated conductor element on one from their rungs - designed as a hollow profile can be determined by means of a lock, the one Has locking bolt, under the action of an adjusting spring and with a handle into the hollow profile of the rung is insertable and lockable in this position and also the locking bolt fixed to the handle in one the guide element attached to the guide piece axially movable is stored.
  • the invention has set itself the task of a pull-out ladder of the kind specified at the beginning in such a way that such a guide socket in simple Be held on the intended conductor element can without a complex rivet or screw connection should be used. Nevertheless, one should such bracket appropriate permanent security offer against a self-loosening of the connection.
  • the object is achieved in that the Guide socket on the conductor element by means of a bayonet lock is attachable.
  • a bracket of the guide socket is with one hand produced.
  • the elements of the bayonet catch can with no difficulty and additional effort at the Production of the guide socket and the ladder element can be provided, as indicated by those below Details will become clear.
  • a guide hole for the guide socket in the conductor element concentrically surrounds, with the guide flange can have at least three retaining cams, which are complementary by area Retaining recesses of the counter flange are feasible and after axially rotating the guide flange against the counter flange, on the opposite of which the guide stub Face, with an annular collar of the guide socket, striking the conductor element, the axial Introduction of the guide flange in the conductor element.
  • the counter flange therefore consists solely of the holding recesses, which is the guide hole in the conductor element expand radially outward and it is consequently not a separate component, just a defined one Area piece of the conductor element.
  • the guide flange provides in the course of the displacement of the spar on the conductor element is not an obstacle if, as usual is the web of the spar from the web of the conductor element spaced out, which is usually already is desired for other reasons. So the ends of the Always sprout something over the bridge of the Holmes to which they are usually flanged or connected in some other way so that it survived a certain distance anyway the bridges require each other.
  • the ladder elements are therefore equipped with leading edges that cover the distance of the respective spar.
  • a position-securing for the bayonet lock Locking is available, for example in such a way that on the circumference of the guide socket Eyelet with an axially parallel first pin hole for a locking pin is provided which in one to the first axially aligned, second pin hole in the conductor element is beatable.
  • the second pin hole is designed that the locking pin can only be hammered in can, if a secure bayonet lock is made, that is, if the guide socket after the insertion of the Guide flange rotated accordingly in the counter flange has been.
  • the locking bolt is best tubular and connected to the handle, preferably pinned, so that by direct manual operation between its corresponding to the locking or unlocking axial position is changeable.
  • an anti-rotation device between the guide socket and the locking bolt (and thus also the handle).
  • the anti-rotation device is not complete and unsolvable, but if a - albeit limited - twisting of the locking bolt (and only in his deducted from the rungs Location).
  • the guide groove preferably has an acute angle lateral kink on.
  • the invention has created an arrangement in which the guide socket on the ladder element quickly and safely is attachable and in addition in simpler Way is ensured that the unlocking of the locking bolt in a stable operational position is transferable so that the loaded by the spring Latch bolt on the one hand the adjustment of the associated Holmes not disabled and on the other hand during one Adjustment does not have to be recorded.
  • the extension ladder is therefore efficient to manufacture and easy to handle.
  • a pull-out ladder according to the invention exists accordingly Fig. 1 first of ladder elements 1 with 11 footrests the conductor elements 1 spars 2 are slidable in Embodiment with joints 21 in pairs are connected and together with the conductor elements 1 Form folding ladder.
  • the ladder elements 1 and the spars 2 enable by their mutual telescopic displacement different working lengths of the pull-out ladder.
  • the Spars 2 are paired with each other by rungs 22 Extract pieces 20 connected; are also the conductor elements 1 similarly by rungs 12 in pairs to pieces of ladder 10 composed.
  • the ladder and pull-out pieces 10.20 of those shown in FIG. 1 in the use position Extension ladders are folded for transportation and storage and pushed.
  • the spar 2 is locked on the conductor element 1 thereby by a locking bolt that can be moved axially by hand 31, in the cross section of one of the hollow sections trained rungs 22 inserted and from this position can also be deducted.
  • Both the locking as well as the unlocked position of the locking bolt 31 is designed as a stable locking device, as is still the case will be show. The details are shown in FIG. 3.
  • the substantially tubular locking bolt 31 is in one Guide socket 32 axially and - to a limited extent - also radially movable.
  • the guide stub 32 is for this (Fig. 4b) provided with a bearing bore 32a.
  • axially parallel Guide grooves 31a (Fig. 5) in the locking bolt 31 penetrated by a transverse pin 32b which, in FIG. 4 indicated, by means of pin bores 32c with the guide socket 32 is pinned after the locking bolt 31 in has been introduced.
  • the axial mobility of the The locking bolt 31 is 1 through the length of the guide grooves 31a.
  • the entire locking bolt 31 piercing cross pin 32b can also or two short cross pins 32b are used, which are only are driven into the area of the guide groove 31a.
  • the guide groove 31a and the cross pin 32b accordingly form an anti-rotation device 31a; 32b of the locking bolt 31 out.
  • An end face of the locking bolt 31 on its in the Rungs 22 immersed side is by an example flanged to its hollow cylindrical body 31b End wall 31c at least partially closed; the front wall 31c is somewhat curved (FIG. 5), so that the introduction of the locking bolt 31 in the Hollow profile of a rung 22 is facilitated, and serves as axial fixed bearing for a plunging into the locking bolt 31 Actuator spring 33 (Fig. 3), the locking bolt 31 in Direction of locking the spar 2 loaded; this Position is therefore the normal and without intervention stable position of the lock 3.
  • the locking bolt 31 is also fixed with a handle 34 connected, here by means of a connecting pin 34a (Fig. 3).
  • the handle 34 is located on another Fixed bearing on the spring 33; for this purpose (Fig. 6) the handle 34 a spring bearing 34b for the as cylindrical compression spring trained spring 33.
  • the Spring bearing 34b is designed as an axial cylindrical punch, which is also directed towards the end of the actuating spring 33 has an annular groove 34c into which the locking bolt 31 is axially insertable; one installed in this area Cross bore 34d (Fig. 6) is used to drive the Connecting pin 34a. With a handle 34e of the handle 34 of the locking bolt 31 are moved.
  • the guide grooves 31a are on their facing away from the handle 34 End at an acute angle to a short one Angled bend 31d.
  • the locking bolt 31 by means of of the handle 34 in its unlocked by the spar 2 Withdrawn position, so it can be rotated a bit, so that the cross pin 32b in the region of the bends 31d device.
  • this Under the influence of the actuating spring 33, this is Unlocking position stable because the locking bolt 31st not “automatically” in the axially parallel area of the guide groove 31a, but only with the help of Handle 34 after a short, the action of the spring 33 opposite movement, by which the of the kink 31d formed acute-angled gusset 31e (Fig. 5) can be overcome.
  • the conductor element 1 is (Fig. 2, 3) in cross section approximately U-shaped with a web 1a between two angled straps 1b.
  • a in the web 1a of the conductor element 1 guide bore 13 no closed for the guide stub 32 has a circular cylindrical contour. Rather, this is on their circumference radially around essentially rectangular holding recesses 14 expanded.
  • the - in the embodiment four - form retaining recesses 14 (together with those of included them, the guide holes 13 bordering Surface pieces 15) a counter flange G for one Guide socket 32 leading flange F, the (Fig. 4) from a flange 32d and several (here four) radially adjoining these holding cams 32e consists.
  • the holding cams 32e are approximately congruent with the surface the holding recesses 14 in such a way that the guide flange F with its holding cams 32e comfortably through the counter flange G are inserted with its holding recesses 14 can. It then lies approximately on the inside of the web 1a the counter flange G and can be rotated so that its holding cams 32e from the area of the holding recesses 14 guess and rest on the surface pieces 15. In this The position is that of the guide flange F and the counter flange G formed bayonet lock F, G locked.
  • the guide flange f cannot go as far through the counter flange G grab because of its axial mobility in this Direction is limited by a collar 32f so that the facing surfaces of the holding cams 32e and the patches 15 are closely adjacent. To this Way, the bayonet lock F, G with relatively winy Axial play can be realized, and the guide flange F remains spaced from the spar 2, so that this at the Rungs 22 released locking bolt 31 freely against the ladder element 1 is movable.
  • the guide stub 32 is simple against radial Twist secured.
  • a radial eyelet 32g formed with one to the guide stub 32 axially parallel first Pin bore 32h is provided on the guide socket 32 .
  • a second pin hole in the web 1a (omitted in the drawing) is arranged that a locking pin in the two pin holes can be driven if the bayonet lock F, G into its locking angular position is rotated. So that can do not release the bayonet lock F, G automatically. Nevertheless the guide socket 32 can be easily changed if necessary or be removed.

Landscapes

  • Ladders (AREA)
  • Programmable Controllers (AREA)

Description

Die Erfindung betrifft eine Auszugsleiter, deren Leiterelemente mittels an ihnen verschiebbaren Holmen teleskopartig verlängerbar sind, wobei die Holme in mehreren Stellungen an dem jeweils zugehörigen Leiterelement an einer von ihren - als Hohlprofil ausgebildeten - Sprossen mittels einer Verriegelung feststellbar sind, die einen Riegelbolzen aufweist, der unter der Wirkung einer Stellfeder und mit einem Handgriff in das Hohlprofil der Sprosse einführ- und in dieser Lage arretierbar ist und wobei ferner der an dem Handgriff fixierte Riegelbolzen in einem an dem Leiterelement angebrachten Führungsstutzen axial beweglich gelagert ist.The invention relates to a pull-out ladder, the ladder elements telescopically by means of rails that can be moved on them are extendable, the spars in several Positions on the associated conductor element on one from their rungs - designed as a hollow profile can be determined by means of a lock, the one Has locking bolt, under the action of an adjusting spring and with a handle into the hollow profile of the rung is insertable and lockable in this position and also the locking bolt fixed to the handle in one the guide element attached to the guide piece axially movable is stored.

Eine solche Auszugsleiter ist aus der Offenlegungsschrift DE 44 03 001 A1 bereits bekannt. Der Führungsstutzen für den Riegelbolzen ist bei dieser Ausführung an einem Flanschstück ausgebildet, welches an dem jeweiligen Leiterelement angenietet oder angeschraubt ist.Such a pull-out ladder is from the published patent application DE 44 03 001 A1 is already known. The guide socket for the locking bolt is in this version on one Flange piece formed, which on the respective conductor element riveted or screwed.

Die Erfindung hat sich die Aufgabe gestellt, eine Auszugsleiter der eingangs näher bezeichneten Art so auszubilden, daß ein solcher Führungsstutzen in einfacher Weise an dem vorgesehenen Leiterelement gehaltert werden kann, ohne daß dafür eine aufwendige Niet- oder Schraubverbindung verwendet werden müßte. Gleichwohl soll aber eine derartige Halterung eine entsprechende dauerhafte Sicherheit gegen eine Selbstlösung der Verbindung bieten.The invention has set itself the task of a pull-out ladder of the kind specified at the beginning in such a way that such a guide socket in simple Be held on the intended conductor element can without a complex rivet or screw connection should be used. Nevertheless, one should such bracket appropriate permanent security offer against a self-loosening of the connection.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß der Führungsstutzen an dem Leiterelement mittels eines Bajonettverschlusses befestigbar ist. Eine so ausgebildete Halterung des Führungsstutzens ist mit einem einzigen Handgriff herstellbar. Die Elemente des Bajonettverschlusses können ohne Schwierigkeit und zusätzlichen Aufwand bei der Anfertigung des Führungsstutzens und des Leiterelementes mit vorgesehen werden, wie durch die unten näher bezeichneten Einzelheiten deutlich werden wird.According to the invention the object is achieved in that the Guide socket on the conductor element by means of a bayonet lock is attachable. Such a bracket of the guide socket is with one hand produced. The elements of the bayonet catch can with no difficulty and additional effort at the Production of the guide socket and the ladder element can be provided, as indicated by those below Details will become clear.

So ist es beispielsweise vorteilhaft, wenn der Bajonettverschluß aus einen an dem Führungsstutzen stirnseitig vorgesehenen Führflansch und einem Gegenflansch besteht, der in dem Leiterelement eine Führungsbohrung für den Führungsstutzen konzentrisch umgibt, wobei der Führflansch mindestens drei Haltenocken aufweisen kann, die durch flächen-komplementäre Halteausnehmungen des Gegenflansches führbar sind und, nach axialem Verdrehen des Führflansches gegen den Gegenflansch, an dessen dem Führungsstutzen abgewandter Stirnfläche anliegen, wobei ein Ringbund des Führungsstutzens, an dem Leiterelement anschlagend, die axiale Einführung des Führflansches in das Leiterelement festlegt.For example, it is advantageous if the bayonet catch one on the end of the guide socket provided guide flange and a counter flange, a guide hole for the guide socket in the conductor element concentrically surrounds, with the guide flange can have at least three retaining cams, which are complementary by area Retaining recesses of the counter flange are feasible and after axially rotating the guide flange against the counter flange, on the opposite of which the guide stub Face, with an annular collar of the guide socket, striking the conductor element, the axial Introduction of the guide flange in the conductor element.

Der Gegenflansch besteht demzufolge allein aus den Halteausnehmungen, welche die Führungsbohrung in dem Leiterelement radial nach außen erweitern, und er ist demzufolge kein separates Bauteil, sondern lediglich ein definiertes Flächenstück des Leiterelementes. Bei der Einbringung der Führungsbohrung in den Steg des Leiterelementes wird er zwanglos und ohne zusätzlichen Aufwand mit angefertigt.The counter flange therefore consists solely of the holding recesses, which is the guide hole in the conductor element expand radially outward and it is consequently not a separate component, just a defined one Area piece of the conductor element. When bringing in the guide hole in the web of the conductor element it is made with ease and without additional effort.

Der Führflansch stellt im Zuge der Verschiebung des Holmes an dem Leiterelement kein Hindernis dar, wenn, wie das üblich ist, der Steg des Holmes von dem Steg des Leiterelementes beabstandet geführt ist, was in der Regel bereits aus anderen Gründen erwünscht ist. So stehen die Enden der Sprossen stets etwas über den Steg des Holmes vor, an den sie zumeist angebördelt oder auf andere Weise angeschlossen werden, so daß dieser überstand ohnehin einen gewissen Abstand der Stege voneinander erfordert. Die Leiterelemente sind deshalb mit Führkanten ausgerüstet, welche die Distanz des jeweiligen Holmes festlegen.The guide flange provides in the course of the displacement of the spar on the conductor element is not an obstacle if, as usual is the web of the spar from the web of the conductor element spaced out, which is usually already is desired for other reasons. So the ends of the Always sprout something over the bridge of the Holmes to which they are usually flanged or connected in some other way so that it survived a certain distance anyway the bridges require each other. The ladder elements are therefore equipped with leading edges that cover the distance of the respective spar.

Es ist zweckmäßig, wenn für den Bajonettverschluß eine lagesichernde Arretierung zur Verfügung steht, beispielsweise in der Weise, daß an dem Umfang des Führungsstutzens ein Ösenstück mit einer achsparallelen ersten Stiftsbohrung für einen Arretierstift vorgesehen ist, der in eine zu der ersten achsfluchtende, zweite Stiftsbohrung in dem Leiterelement einschlagbar ist. Die zweite Stiftsbohrung ist so angelegt, daß der Arretierstift nur eingeschlagen werden kann, wenn ein sicherer Bajonettverschluß hergestellt ist, das heißt, wenn der Führungsstutzen nach dem Einführen des Führungsflansches in den Gegenflansch entsprechend verdreht worden ist.It is useful if a position-securing for the bayonet lock Locking is available, for example in such a way that on the circumference of the guide socket Eyelet with an axially parallel first pin hole for a locking pin is provided which in one to the first axially aligned, second pin hole in the conductor element is beatable. The second pin hole is designed that the locking pin can only be hammered in can, if a secure bayonet lock is made, that is, if the guide socket after the insertion of the Guide flange rotated accordingly in the counter flange has been.

Im einzelnen ist der Riegelbolzen am besten rohrförmig ausgebildet und mit den Handgriff verbunden, vorzugsweise verstiftet, so daß er durch direkte Handbetätigung zwischen seiner der Verriegelung bzw. Entriegelung entsprechenden axialen Lage wechselbar ist. Außerdem kann eine Verdrehsicherung zwischen dem Führungsstutzen und dem Riegelbolzen (und damit auch dem Handgriff) vorgesehen sein.In particular, the locking bolt is best tubular and connected to the handle, preferably pinned, so that by direct manual operation between its corresponding to the locking or unlocking axial position is changeable. In addition, an anti-rotation device between the guide socket and the locking bolt (and thus also the handle).

Besonders vorteilhaft ist es dabei, wenn die Verdrehsicherung nicht vollständig und unlösbar ist, sondern wenn sie eine - allerdings begrenzte - Verdrehung des Riegelbolzens (und dies nur in seiner von den Sprossen abgezogenen Lage) zuläßt. Sie kann dabei vorteilhaft aus einem in dem Führungsstutzen befestigten Querstift und einer achsparallelen Führnut in dem Riegelbolzen bestehen, die von dem Querstift durchgriffen wird. In einer bevorzugten Ausführung weist die Führnut eine vorzugsweise spitzwinklige seitliche Abknickung auf. Eine solche Anordnung bietet den Vorteil, daß der Riegelbolzen, wenn er entriegelt ist, durch eine geringfügige Verdrehung in eine stabile Entriegelungsstellung bringbar ist, so daß er bei der Verstellung des betreffenden Holmes nicht festgehalten werden muß.It is particularly advantageous if the anti-rotation device is not complete and unsolvable, but if a - albeit limited - twisting of the locking bolt (and only in his deducted from the rungs Location). You can benefit from one in the Guide connector attached cross pin and an axially parallel Guide groove in the latch bolt consist of that Cross pin is penetrated. In a preferred embodiment the guide groove preferably has an acute angle lateral kink on. Such an arrangement offers the Advantage that the locking bolt, when unlocked, by a slight twist into a stable unlocking position can be brought so that it is in the adjustment of the Holmes concerned does not have to be held.

Durch die Erfindung ist eine Anordnung entstanden, bei welcher der Führungsstutzen schnell und sicher an dem Leiterelement anbringbar ist und bei der darüberhinaus in einfacher Weise dafür gesorgt ist, daß die Entriegelung des Riegelbolzens in eine stabile Betriebsbereitschafts-Stellung überführbar ist, so daß der von der Stellfeder belastete Riegelbolzen einerseits die Verstellung des zugehörigen Holmes nicht behindert und andererseits während einer solchen Verstellung nicht extra festgehalten muß. Die Auszugsleiter ist deshalb rationell herstell- und bequem handhabbar. The invention has created an arrangement in which the guide socket on the ladder element quickly and safely is attachable and in addition in simpler Way is ensured that the unlocking of the locking bolt in a stable operational position is transferable so that the loaded by the spring Latch bolt on the one hand the adjustment of the associated Holmes not disabled and on the other hand during one Adjustment does not have to be recorded. The extension ladder is therefore efficient to manufacture and easy to handle.

Die Erfindung wird nachstehend an Hand der Zeichnung an einem Ausführungsbeispiel näher erläutert. Es zeigen

Fig. 1
eine erfindungsgemäße Auszugsleiter in der Übersicht in ihrer Gebrauchsstellung,
Fig. 2
eine Einzelheit A aus Fig. 1, vergrößert und mit verriegeltem Holm und
Fig. 3
die Einzelheit A mit Sprengdarstellung der Einzelteile der Verriegelung,
sämtlich in räumlicher Darstellung, und
Fig. 4
einen erfindungsgemäßen Führungsstutzen in der Hauptansicht (Fig. 4a) und (Fig. 4b) einem Schnitt B-B aus Fig. 4a und
Fig. 5 und 6
einen Riegelbolzen und einen Handgriff nach der Erfindung in der Hauptansicht,
insgesamt in schematisch vereinfachten und unterschiedlich vergrößerten Darstellungen.The invention is explained below with reference to the drawing using an exemplary embodiment. Show it
Fig. 1
an extension ladder according to the invention in the overview in its position of use,
Fig. 2
a detail A of FIG. 1, enlarged and with the spar locked and
Fig. 3
the detail A with an exploded view of the individual parts of the lock,
all in spatial representation, and
Fig. 4
a guide socket according to the invention in the main view (Fig. 4a) and (Fig. 4b) a section BB from Fig. 4a and
5 and 6
a locking bolt and a handle according to the invention in the main view,
overall in schematically simplified and differently enlarged representations.

Eine Auszugsleiter nach der Erfindung besteht entsprechend Fig. 1 zunächst aus Leiterelementen 1 mit Fußstützen 11. An den Leiterelementen 1 sind Holme 2 verschiebbar, die im Ausführungsbeispiel mit Gelenken 21 paarweise miteinander verbunden sind und zusammen mit den Leiterelementen 1 eine Klapp-Leiter bilden. Die Leiterelemente 1 und die Holme 2 ermöglichen durch ihre gegenseitige teleskopartige Verschiebung verschiedene Arbeitslängen der Auszugsleiter. Die Holme 2 sind durch Sprossen 22 paarweise miteinander zu Auszugsstücken 20 verbunden; auch die Leiterelemente 1 sind in ähnlicher Weise durch Sprossen 12 paarweise zu Leiterstücken 10 zusammengesetzt. Die Leiter- und Auszugsstücke 10,20 der in der Fig. 1 in der Gebrauchsstellung gezeigten Auszugsleiter werden zum Transport und zum Abstellen zusammengeklappt und -geschoben.A pull-out ladder according to the invention exists accordingly Fig. 1 first of ladder elements 1 with 11 footrests the conductor elements 1 spars 2 are slidable in Embodiment with joints 21 in pairs are connected and together with the conductor elements 1 Form folding ladder. The ladder elements 1 and the spars 2 enable by their mutual telescopic displacement different working lengths of the pull-out ladder. The Spars 2 are paired with each other by rungs 22 Extract pieces 20 connected; are also the conductor elements 1 similarly by rungs 12 in pairs to pieces of ladder 10 composed. The ladder and pull-out pieces 10.20 of those shown in FIG. 1 in the use position Extension ladders are folded for transportation and storage and pushed.

Zur Sicherung der - ausgezogenen - Gebrauchsstellung der Auszugsleiter der Fig. 1 ist an jeder Paarung aus einem Leiterelement 1 und einem Holm 2 eine Verriegelung 3 vorgesehen, wie sie in der vergrößerten Darstellung der Fig. 2 gut erkennbar ist; die Einzelheiten einer solchen Verriegelung zeigt die Fig. 3.To secure the - extended - use position of the The pull-out ladder of FIG. 1 is made of one on each pairing Conductor element 1 and a spar 2, a lock 3 is provided, as shown in the enlarged representation of FIG. 2 is clearly recognizable; the details of such a lock 3 shows.

Die Arretierung des Holmes 2 an dem Leiterelement 1 erfolgt dabei durch einen von Hand axial verschiebbaren Riegelbolzen 31, der in den Querschnitt einer der als Hohlprofile ausgebildeten Sprossen 22 eingeschoben und aus dieser Stellung auch wieder abgezogen werden kann. Sowohl die verriegelnde als auch die entriegelte Position des Riegelbolzens 31 ist als stabile Arretierung ausgebildet, wie noch zu zeigen sein wird. Die Einzelheiten zeigt Fig. 3.The spar 2 is locked on the conductor element 1 thereby by a locking bolt that can be moved axially by hand 31, in the cross section of one of the hollow sections trained rungs 22 inserted and from this position can also be deducted. Both the locking as well as the unlocked position of the locking bolt 31 is designed as a stable locking device, as is still the case will be show. The details are shown in FIG. 3.

Der im wesentlichen rohrförmige Riegelbolzen 31 ist in einem Führungsstutzen 32 axial und - in beschränktem Umfang - auch radial beweglich. Der Führungsstutzen 32 ist dazu (Fig. 4b) mit einer Lagerbohrung 32a versehen. Achsparallele Führnuten 31a (Fig. 5) in dem Riegelbolzen 31 werden von einem Querstift 32b durchgriffen, der, in der Fig. 4 angedeutet, mittels Stiftsbohrungen 32c mit dem Führungsstutzen 32 verstiftet ist, nachdem der Riegelbolzen 31 in diesen eingeführt worden ist. Die axiale Beweglichkeit des Riegelbolzens 31 ist damit durch die Länge 1 der Führnuten 31a festgelegt. Anstelle eines einzigen, den gesamten Riegelbolzen 31 durchstoßenden Querstiftes 32b können auch ein oder zwei kurze Querstifte 32b verwendet werden, die lediglich bis in den Bereich der Führnut 31a eingeschlagen werden. Die Führnut 31a und der Querstift 32b bilden demzufolge eine Verdrehsicherung 31a;32b des Riegelbolzens 31 aus.The substantially tubular locking bolt 31 is in one Guide socket 32 axially and - to a limited extent - also radially movable. The guide stub 32 is for this (Fig. 4b) provided with a bearing bore 32a. axially parallel Guide grooves 31a (Fig. 5) in the locking bolt 31 penetrated by a transverse pin 32b which, in FIG. 4 indicated, by means of pin bores 32c with the guide socket 32 is pinned after the locking bolt 31 in has been introduced. The axial mobility of the The locking bolt 31 is 1 through the length of the guide grooves 31a. Instead of a single one, the entire locking bolt 31 piercing cross pin 32b can also or two short cross pins 32b are used, which are only are driven into the area of the guide groove 31a. The guide groove 31a and the cross pin 32b accordingly form an anti-rotation device 31a; 32b of the locking bolt 31 out.

Eine Stirnseite des Riegelbolzens 31 auf seiner in die Sprossen 22 eintauchenden Seite ist durch eine beispielsweise an seinen hohlzylindrischen Korpus 31b angebördelte Stirnwand 31c zumindest teilweise geschlossen; die Stirnwand 31c ist (Fig. 5) einigermaßen gewölbt ausgebildet, so daß die Einführung des Riegelbolzens 31 in das Hohlprofil einer Sprosse 22 erleichtert wird, und dient als axiales Festlager für eine in den Riegelbolzen 31 eintauchende Stellfeder 33 (Fig. 3), die den Riegelbolzen 31 in Richtung einer Arretierung des Holmes 2 belastet; diese Stellung ist demzufolge die ohne Eingriffe regelrechte und stabile Stellung der Verriegelung 3.An end face of the locking bolt 31 on its in the Rungs 22 immersed side is by an example flanged to its hollow cylindrical body 31b End wall 31c at least partially closed; the front wall 31c is somewhat curved (FIG. 5), so that the introduction of the locking bolt 31 in the Hollow profile of a rung 22 is facilitated, and serves as axial fixed bearing for a plunging into the locking bolt 31 Actuator spring 33 (Fig. 3), the locking bolt 31 in Direction of locking the spar 2 loaded; this Position is therefore the normal and without intervention stable position of the lock 3.

Der Riegelbolzen 31 ist ferner mit einem Handgriff 34 fest verbunden, hier mittels eines Verbindungsstiftes 34a (Fig. 3). An dem Handgriff 34 liegt andererseits an einem weiteren Festlager die Stellfeder 33 an; zu diesem Zweck weist (Fig. 6) der Handgriff 34 ein Federlager 34b für die als zylindrische Druckfeder ausgebildete Stellfeder 33 auf. Das Federlager 34b ist als axialer zylindrischer Stempel ausgebildet, der außerdem stirnseitig auf die Stellfeder 33 gerichtet eine Ringnut 34c besitzt, in welche der Riegelbolzen 31 axial einsteckbar ist; eine in diesem Bereich angebrachte Querbohrung 34d (Fig. 6) dient zum Einschlagen des Verbindungsstiftes 34a. Damit kann mit einem Griffstück 34e des Handgriffes 34 der Riegelbolzen 31 bewegt werden.The locking bolt 31 is also fixed with a handle 34 connected, here by means of a connecting pin 34a (Fig. 3). On the other hand, the handle 34 is located on another Fixed bearing on the spring 33; for this purpose (Fig. 6) the handle 34 a spring bearing 34b for the as cylindrical compression spring trained spring 33. The Spring bearing 34b is designed as an axial cylindrical punch, which is also directed towards the end of the actuating spring 33 has an annular groove 34c into which the locking bolt 31 is axially insertable; one installed in this area Cross bore 34d (Fig. 6) is used to drive the Connecting pin 34a. With a handle 34e of the handle 34 of the locking bolt 31 are moved.

Die Führnuten 31a sind an ihrem von dem Handgriff 34 abgewandten Ende spitzwinklig jeweils zu einer kurzen Abknickung 31d abgewinkelt. Wird der Riegelbolzen 31 mittels des Handgriffes 34 in seine von dem Holm 2 entriegelte Stellung zurückgezogen, so kann er etwas gedreht werden, so daß der Querstift 32b in den Bereich der Abknickungen 31d gerät. Unter dem Einfluß der Stellfeder 33 ist diese Entriegelungsstellung stabil, weil der Riegelbolzen 31 nicht "von selbst" in den achsparallelen Bereich der Führnut 31a zurückgelangen kann, sondern nur mit Hilfe des Handgriffes 34 nach einer kurzen, der Wirkung der Stellfeder 33 entgegengerichteten Bewegung, durch welche die von den Abknickungen 31d ausgebildeten spitzwinkligen Zwickel 31e (Fig. 5) überwunden werden können.The guide grooves 31a are on their facing away from the handle 34 End at an acute angle to a short one Angled bend 31d. The locking bolt 31 by means of of the handle 34 in its unlocked by the spar 2 Withdrawn position, so it can be rotated a bit, so that the cross pin 32b in the region of the bends 31d device. Under the influence of the actuating spring 33, this is Unlocking position stable because the locking bolt 31st not "automatically" in the axially parallel area of the guide groove 31a, but only with the help of Handle 34 after a short, the action of the spring 33 opposite movement, by which the of the kink 31d formed acute-angled gusset 31e (Fig. 5) can be overcome.

Das Leiterelement 1 ist (Fig. 2, 3) im Querschnitt etwa U-förmig mit einem Steg 1a zwischen zwei abgewinkelten Gurten 1b. In der Fig. 3 ist ohne weiteres zu erkennen, daß eine in dem Steg 1a des Leiterelementes 1 befindliche Führungsbohrung 13 für den Führungsstutzen 32 keine geschlossene kreiszylindrische Kontur aufweist. Diese ist vielmehr an ihrem Umfang radial um im wesentlichen rechteckige Halteausnehmungen 14 erweitert. Die - im Ausführungsbeispiel vier - Halteausnehmungen 14 bilden (zusammen mit den von ihnen eingeschlossenen, die Führungsbohrungen 13 berandenden Flächenstücken 15) einen Gegenflansch G für einen den Führungsstutzen 32 stirnseitig begrenzenden Führflansch F, der (Fig. 4) aus einem Flanschring 32d und aus mehreren (hier vier) radial an diesen anschließenden Haltenocken 32e besteht. Die Haltenocken 32e sind etwa flächenkongruent mit den Halteausnehmungen 14 in der Weise, daß der Führflansch F mit seinen Haltenocken 32e bequem durch den Gegenflansch G mit seinen Halteausnehmungen 14 hindurchgesteckt werden kann. Er liegt dann an der Innenseite des Steges 1a etwa an dem Gegenflansch G an und kann so verdreht werden, daß seine Haltenocken 32e aus dem Bereich der Halteausnehmungen 14 geraten und an den Flächenstücken 15 anliegen. In dieser Lage ist der aus dem Führflansch F und dem Gegenflansch G gebildete Bajonettverschluß F, G verriegelt.The conductor element 1 is (Fig. 2, 3) in cross section approximately U-shaped with a web 1a between two angled straps 1b. In Fig. 3 it can easily be seen that a in the web 1a of the conductor element 1 guide bore 13 no closed for the guide stub 32 has a circular cylindrical contour. Rather, this is on their circumference radially around essentially rectangular holding recesses 14 expanded. The - in the embodiment four - form retaining recesses 14 (together with those of included them, the guide holes 13 bordering Surface pieces 15) a counter flange G for one Guide socket 32 leading flange F, the (Fig. 4) from a flange 32d and several (here four) radially adjoining these holding cams 32e consists. The holding cams 32e are approximately congruent with the surface the holding recesses 14 in such a way that the guide flange F with its holding cams 32e comfortably through the counter flange G are inserted with its holding recesses 14 can. It then lies approximately on the inside of the web 1a the counter flange G and can be rotated so that its holding cams 32e from the area of the holding recesses 14 guess and rest on the surface pieces 15. In this The position is that of the guide flange F and the counter flange G formed bayonet lock F, G locked.

Der Führflansch f kann nicht beliebig weit durch den Gegenflansch G greifen, weil seine axiale Beweglichkeit in dieser Richtung durch einen Ringbund 32f so begrenzt ist, daß die einander zugewandten Oberflächen der Haltenocken 32e und der Flächenstücke 15 eng benachbart sind. Auf diese Weise kann der Bajonettverschluß F, G mit relativ weinig Axialspiel realisiert werden, und der Führflansch F bleibt von dem Holm 2 beabstandet, so daß dieser bei von den Sprossen 22 gelöstem Riegelbolzen 31 frei gegen das Leiterelement 1 beweglich ist.The guide flange f cannot go as far through the counter flange G grab because of its axial mobility in this Direction is limited by a collar 32f so that the facing surfaces of the holding cams 32e and the patches 15 are closely adjacent. To this Way, the bayonet lock F, G with relatively winy Axial play can be realized, and the guide flange F remains spaced from the spar 2, so that this at the Rungs 22 released locking bolt 31 freely against the ladder element 1 is movable.

Der Führungsstutzen 32 ist in einfacher Weise gegen radiale Verdrehung gesichert. Dazu ist (Fig. 4) an dem Führungsstutzen 32 ein radiales Ösenstück 32g ausgebildet, das mit einer zu dem Führungsstutzen 32 achsparallelen ersten Stiftsbohrung 32h versehen ist. Eine zweite Stiftsbohrung in dem Steg 1a (in der Zeichnung weggelassen) ist so angeordnet, daß ein Arretierstift in die beiden Stiftsbohrungen einschlagbar ist, wenn der Bajonettverschluß F, G in seine arretierende Winkelstellung verdreht ist. Damit kann sich der Bajonettverschluß F, G nicht selbsttätig lösen. Trotzdem kann der Führungsstutzen 32 bei Bedarf problemlos gewechselt oder entfernt werden. The guide stub 32 is simple against radial Twist secured. For this purpose (Fig. 4) on the guide socket 32 a radial eyelet 32g formed with one to the guide stub 32 axially parallel first Pin bore 32h is provided. A second pin hole in the web 1a (omitted in the drawing) is arranged that a locking pin in the two pin holes can be driven if the bayonet lock F, G into its locking angular position is rotated. So that can do not release the bayonet lock F, G automatically. Nevertheless the guide socket 32 can be easily changed if necessary or be removed.

Aufstellung der BezugszeichenList of reference numbers

11
Leiterelementconductor element
1a1a
Stegweb
1b1b
Gurtbelt
1010
Leiterstückconductor piece
1111
Fußstützefootrest
1212
Sprosserung
1313
Führungsbohrungguide bore
1414
Halteausnehmungholding recess
1515
Flächenstückpatch
22
HolmHolm
2020
Auszugsstückexcerpt piece
2121
Gelenkjoint
2222
Sprosserung
33
Verriegelunglock
3131
Riegelbolzenlocking bolt
31a31a
Führnutguide groove
31b31b
Korpuscorpus
31c31c
Stirnwandbulkhead
31d31d
Abknickungkinking
31e31e
Zwickelgore
3232
Führungsstutzenguide socket
32a32a
Lagerbohrungbearing bore
32b32b
Querstiftcross pin
31a;32b31a; 32b
Verdrehsicherung (nur im Text)Anti-rotation device (only in the text)
32c32c
Stiftsbohrungpin hole
32d32d
Flanschringflange
32e32e
Haltenockenholding cams
32f32f
Ringbundcollar
32g32g
Ösenstückeyelet piece
32h32h
Stiftsbohrungpin hole
3333
Stellfederspring
3434
Handgriffhandle
34a34a
Verbindungsstiftconnecting pin
34b34b
Federlagerspring camp
34c34c
Ringnutring groove
34d34d
Querbohrungcross hole
34e34e
Griffstückgrip
FF
Führflanschguide flange
GG
Gegenflanschcounterflange
F, GF, G
Bajonettverschluß (nur im Text)Bayonet lock (only in the text)
11
Längelength

Claims (10)

  1. A folding ladder, the ladder parts (1) of which are telescopically extensible by means of longitudinal members (2) displaceable thereon, wherein the longitudinal members (2) are fixable in a plurality of positions on the respective associated ladder part (1) on one of its rungs (22) - formed as a hollow section - by means of a locking device (3) having a locking bolt (31) which is insertable into the hollow section of the rung (22), under the action of an adjusting spring (33) and by means of a knob (34), and is securable in this position, and furthermore wherein the locking bolt (31) fixed to the knob (34) is axially movably mounted in a guide socket (32) attached to the ladder part (1), characterised in that the guide socket (32) is fixable to the ladder part (1) by means of a bayonet fixing (F, G).
  2. A folding ladder according to claim 1, characterised in that the bayonet fixing (F, G) comprises a guide flange (F), provided on the end of the guide socket (32), and a counterflange (G) concentrically surrounding a guide bore (13) provided in the ladder part (1) for the guide socket (32).
  3. A folding ladder according to claim 2, characterised in that the guide flange (F) has at least three retaining pins (32e) which are guidable through areally complementary retaining recesses (14) in the counterflange (G) and, after the guide flange (F) has been axially rotated towards the counterflange (G), rest against its face remote from the guide socket (32), an annular collar (32f) of the guide socket (32) striking the ladder part (1) and arresting the axial insertion of the guide flange (F) into the ladder part (1).
  4. A folding ladder according to any one of claims 1 to 3, characterised in that a positional securing device is provided for the bayonet fixing (F, G).
  5. A folding ladder according to claim 4, characterised in that an eye (32g) with an axially parallel first pin bore (32h) for a securing pin is provided on the circumference of the guide socket (32), and the securing pin can be driven into an axially aligned second pin bore in the ladder part (1).
  6. A folding ladder according to any one of claims 1 to 5, characterised in that the locking bolt (31) is tubular and is connected, preferably pinned to the knob (34).
  7. A folding ladder according to any one of claims 1 to 6, characterised in that an anti-rotation means (31a, 32b) is provided between the guide socket (32) and the locking bolt (31).
  8. A folding ladder according to claim 7, characterised in that the anti-rotation means (31a, 32b) permits limited rotation of the locking bolt (31) when it has been withdrawn from the rungs (22).
  9. A folding ladder according to claim 7 or 8, characterised in that the anti-rotation means (31a, 32b) comprises a transverse pin (32b) fixed in the guide socket (32) and an axially parallel guide groove (31a) in the locking bolt (31), the transverse pin (32b) extending into the guide groove (31a).
  10. A folding ladder according to claims 8 and 9, characterised in that the guide groove (31a) has a preferably acute-angled lateral return (31d).
EP98909464A 1997-03-04 1998-02-14 Folding ladder Expired - Lifetime EP0964976B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29703876U 1997-03-04
DE29703876U DE29703876U1 (en) 1997-03-04 1997-03-04 Extension ladder
PCT/EP1998/000844 WO1998039546A1 (en) 1997-03-04 1998-02-14 Folding ladder

Publications (2)

Publication Number Publication Date
EP0964976A1 EP0964976A1 (en) 1999-12-22
EP0964976B1 true EP0964976B1 (en) 2003-07-30

Family

ID=8036908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98909464A Expired - Lifetime EP0964976B1 (en) 1997-03-04 1998-02-14 Folding ladder

Country Status (8)

Country Link
US (1) US6220389B1 (en)
EP (1) EP0964976B1 (en)
CA (1) CA2280921A1 (en)
DE (2) DE29703876U1 (en)
HU (1) HUP0000876A3 (en)
PL (1) PL188664B1 (en)
RO (1) RO119155B1 (en)
WO (1) WO1998039546A1 (en)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6698550B2 (en) * 2002-04-04 2004-03-02 Vernon Crain Adjustable step ladder
US6866117B2 (en) 2002-04-05 2005-03-15 Wing Enterprises, Inc. Light weight ladder systems and methods
US7424933B2 (en) * 2002-05-28 2008-09-16 Norman Miller Ladder assemblies
US6622822B1 (en) 2002-08-01 2003-09-23 Volvo Trucks North America, Inc. Bunk ladder
US7364017B2 (en) 2002-11-11 2008-04-29 Wing Enterprises, Inc. Combination ladder, ladder components and methods of manufacturing same
US20050269159A1 (en) * 2004-06-07 2005-12-08 Lin Cho S Telescopic stepladder
US20060076190A1 (en) * 2004-10-08 2006-04-13 Vernon Crain Step ladder
US20060213721A1 (en) * 2005-03-25 2006-09-28 Mario Uttaro Multiple laddering system - the ultimate foldaway system
USD541430S1 (en) * 2005-10-19 2007-04-24 Anthony Restaino Unfolding stepladder
USD541433S1 (en) 2005-12-14 2007-04-24 Robert Wise Top tray and a flip down tray combination for a ladder
USD553757S1 (en) 2006-02-11 2007-10-23 Wing Enterprises, Inc. Ladder hinge pair
US8490747B2 (en) * 2006-06-30 2013-07-23 Werner Co. Telescoping project tray
CA2716861C (en) * 2008-03-07 2016-05-17 Wing Enterprises, Incorporated Ladders, ladder components and related methods
AU2013200666B2 (en) * 2008-03-07 2015-07-02 Wing Enterprises, Inc. Ladders, ladder components and related methods
US8464833B2 (en) * 2010-10-05 2013-06-18 Ge Lee Adjustable hang ladder with fall arresting and cushioning arrangement
CA2968780C (en) 2011-02-22 2019-11-12 Wing Enterprises, Incorporated Ladders, ladder components and related methods
WO2014036607A1 (en) * 2012-09-05 2014-03-13 Branach Technology Pty Ltd Improved releasable coupling for ladder section and the like
US9404305B1 (en) * 2014-03-26 2016-08-02 Mark S. Messick Portable and adaptable platform
US9670726B2 (en) * 2014-05-15 2017-06-06 Kang-Shuo Yeh Multi-purpose ladder with improved rungs
EP3423664B1 (en) 2016-03-04 2021-08-25 Little Giant Ladder Systems, LLC Adjustment mechanisms, ladders incorporating same and related methods
US10900282B2 (en) * 2016-12-21 2021-01-26 James B. Ford Safety ladder
CN107178303A (en) * 2017-03-03 2017-09-19 厦门新技术集成有限公司 The double ladder that a kind of convertible vertical ladder is used
US10557227B2 (en) * 2017-04-14 2020-02-11 Whitmor, Inc. Drying rack
US20180363371A1 (en) * 2017-06-20 2018-12-20 Thomas Huckabay Adjustable ladder device and method
USD833643S1 (en) 2017-07-07 2018-11-13 Tricam Industries, Inc. Integrated ladder tray hook
US11851949B2 (en) * 2018-01-30 2023-12-26 Werner Co. Multipurpose ladder and method
US11280133B2 (en) * 2018-01-30 2022-03-22 Werner Co. 7000 series aluminum alloy ladder, multipurpose ladder and method
MX2020013128A (en) * 2018-06-08 2021-02-18 Little Giant Ladder Systems Llc Combination ladders, ladder components and related methods.
USD943772S1 (en) 2018-10-19 2022-02-15 Little Giant Ladder Systems, Llc Flip-up ladder
USD935054S1 (en) 2018-10-19 2021-11-02 Little Giant Ladder Systems, Llc Ladder
CA3123005A1 (en) 2018-12-13 2020-06-18 Murphy Ladder Llc Foldable and collapsible ladder
CN113710869A (en) 2019-01-25 2021-11-26 雷都捷特梯子公司 Support foot for a ladder, ladder incorporating same, and related methods
USD911555S1 (en) 2019-02-08 2021-02-23 Little Giant Ladder Systems, Llc Top cap for a ladder
USD908924S1 (en) * 2019-05-14 2021-01-26 Werner Co. Multipurpose ladder
USD935055S1 (en) 2019-08-07 2021-11-02 Tricam Industries, Inc. Hinge for a multi-position ladder
USD966556S1 (en) * 2019-12-13 2022-10-11 Murphy Ladder Llc Ladder
USD949438S1 (en) * 2020-01-19 2022-04-19 Aukey Technology Co., Ltd Ladder

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858684A (en) * 1973-06-27 1975-01-07 Harford E Goings Telescoping ladder
US4182431A (en) * 1978-03-13 1980-01-08 Little Giant Industries Inc. Combination extension and step ladder rungs therefor
FR2478550A1 (en) * 1980-03-21 1981-09-25 Mecanismes Comp Ind De DEVICE FOR MOUNTING A CARRIER ARM AND ARTICULATION OF VEHICLE SUN VISOR
US4376470A (en) * 1980-11-06 1983-03-15 Little Giant Industries, Inc. Fiberglass ladder
US4371055A (en) * 1980-11-07 1983-02-01 Little Giant Industries, Inc. Method of manufacturing a fiberglass ladder
US4606432A (en) * 1984-10-29 1986-08-19 Belt Ned W Adjustable ladder leg
US4951780A (en) * 1988-08-08 1990-08-28 Kim Myung H Combination ladder and height adjustable scaffold
DE8814195U1 (en) * 1988-11-12 1989-01-26 Krause-Werk Gmbh & Co Kg, 6320 Alsfeld Articulated ladder
US4854420A (en) * 1988-11-15 1989-08-08 Juang Yuan C Securing means for a double step ladder
BE1004040A6 (en) * 1989-06-16 1992-09-15 Show Min Liaw Stretch scale multi-purpose.
US5062499A (en) * 1990-10-10 1991-11-05 Tu Ching Chuan Side rails fastening mechanism for telescopic aluminum step ladders
KR940020881U (en) 1993-02-01 1994-09-17 유회관 Height adjustment device of ladder

Also Published As

Publication number Publication date
US6220389B1 (en) 2001-04-24
HUP0000876A2 (en) 2000-08-28
HUP0000876A3 (en) 2003-12-29
DE29703876U1 (en) 1998-07-02
DE59809157D1 (en) 2003-09-04
PL334064A1 (en) 2000-01-31
EP0964976A1 (en) 1999-12-22
PL188664B1 (en) 2005-03-31
CA2280921A1 (en) 1998-09-11
WO1998039546A1 (en) 1998-09-11
RO119155B1 (en) 2004-04-30

Similar Documents

Publication Publication Date Title
EP0964976B1 (en) Folding ladder
DE3235857C2 (en)
DE19833857B4 (en) stroller
DE2902738C2 (en) Removable shoulder rest for pistols
DE602004005310T2 (en) drill pipe
DE2520237C2 (en) Device for the detachable connection of two tubular borehole elements
EP0645296B1 (en) Handcart of the rackwagon type
DE69815119T2 (en) STOPPING DEVICE
DE2753736A1 (en) DEVICE FOR CONNECTING TWO PARTS, ESPECIALLY IN FURNITURE CONSTRUCTION
DE29911334U1 (en) Folding device for golf carts
DE60011358T2 (en) safety device
EP1338723A2 (en) Mounting device for a temporary scaffolding safety rail
EP1883078A1 (en) Device for handling small components
DE29619438U1 (en) Fastening device for a device handle for garden tools
EP0457034A1 (en) Folding laundry drying rack
DE102004055394A1 (en) Connection arrangement for a scaffolding guard-rail comprising a mounting part with a hinged locking element that is passed through matching longitudinal holes in the components to be held together
DE2435250A1 (en) NESTABLE COMPONENTS WITH SECURITY LATCH, IN PARTICULAR TUBULAR COMPONENTS FOR WORK SCAFFOLDING
DE3105216C2 (en)
DE2656872C2 (en) Stand with adjustable sloping arm
DE10034592C1 (en) Height adjustment for telescopic tubes, for walking aids or invalid carriages and wheelchairs, has a spring clip at the outer tube with end cheeks to carry locking studs through the outer tube into the inner tube
EP1668218B1 (en) Ladder with security device
DE2228045A1 (en) EXTENDABLE LADDER
DE2217258C3 (en) Articulated fitting for foldable ladders
DE2321346A1 (en) ARTICULATED FITTINGS FOR FOLDING LADDERS
EP0317661A1 (en) Telescopic wishbone

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19990315

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20030806

REF Corresponds to:

Ref document number: 59809157

Country of ref document: DE

Date of ref document: 20030904

Kind code of ref document: P

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040504

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20100223

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110214

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20120221

Year of fee payment: 15

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20130214

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130214

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20150219

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20160225

Year of fee payment: 19

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20161028

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160229

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59809157

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170901