EP0196067A2 - Pivot for a folding chair - Google Patents

Pivot for a folding chair Download PDF

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Publication number
EP0196067A2
EP0196067A2 EP86104092A EP86104092A EP0196067A2 EP 0196067 A2 EP0196067 A2 EP 0196067A2 EP 86104092 A EP86104092 A EP 86104092A EP 86104092 A EP86104092 A EP 86104092A EP 0196067 A2 EP0196067 A2 EP 0196067A2
Authority
EP
European Patent Office
Prior art keywords
stub
tab
connection
joint according
foot
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.)
Granted
Application number
EP86104092A
Other languages
German (de)
French (fr)
Other versions
EP0196067B1 (en
EP0196067A3 (en
Inventor
Jörg Rauschenberger
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Individual
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Individual
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Filing date
Publication date
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Publication of EP0196067A2 publication Critical patent/EP0196067A2/en
Publication of EP0196067A3 publication Critical patent/EP0196067A3/en
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Publication of EP0196067B1 publication Critical patent/EP0196067B1/en
Anticipated expiration legal-status Critical
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C4/00—Foldable, collapsible or dismountable chairs
    • A47C4/04—Folding chairs with inflexible seats
    • A47C4/18—Folding chairs with inflexible seats having a frame made of metal
    • A47C4/20—Folding chairs with inflexible seats having a frame made of metal with legs pivotably connected to seat or underframe
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32262—At selected angle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32262—At selected angle
    • Y10T403/32319—At selected angle including pivot stud
    • Y10T403/32327—At selected angle including pivot stud including radially spaced detent or latch component
    • Y10T403/32336—Engaging notch or recess in outer periphery of component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32262—At selected angle
    • Y10T403/32319—At selected angle including pivot stud
    • Y10T403/32401—Locked by nesting parts

Definitions

  • the invention relates to a joint for a folding chair with stubs for a seat, a backrest and a rear foot, the stub for the seat being molded onto a double-shell joint housing in which the other two stubs are about 90 ° to 120 ° between a position of use and a storage position in which the connection stubs run approximately parallel to one another, are pivotably mounted and are coupled to one another via a gear arranged in the joint housing.
  • the gear is formed by a toothed washer which meshes with one another and requires a relatively large structural volume. Shaping the toothing according to the rules of toothing technology would be too complex, so that the simplified shaping and relatively large tolerances do not result in precise rolling and local overstressing can hardly be avoided.
  • the teeth are susceptible to dirt.
  • the present invention has for its object to improve a joint of the type mentioned in such a way that with a simple compact construction a long service life with low susceptibility to wear and susceptibility to dirt is achieved and in the position of use the joint is secured against unintentional folding is.
  • the invention provides that the coupling is carried out so that in the opened end position of the pivotable stub the two articulation points of the tab with the pivotable stubs and one of the bearing bolts of one of the stubs for the foot or the backrest approximately lie in a connecting line.
  • An optimal use of the maximum available swivel angle can be achieved by d ate in the folded end position of the connection stub the two articulation points of the bracket with the swiveling connection stubs and the bearing bolts of the connection stub for the foot or the backrest also approximately in the vicinity of a connecting line lie, but the pivot point of the tab is on the same side of the connecting line as the bearing pin not lying on the connecting line.
  • This arrangement allows optimal power transmission when opening and closing with force transmission on the backrest without special guides.
  • the connecting stub to be blocked in its movement lie in such a way that the connecting line between the Bearing pin and the stub to be locked and the pivot point of the tab with the stub to be locked.
  • the bolts of the articulation points of the bracket can be designed as a circular cylindrical shape on which the bracket is mounted.
  • the arm ends then do not have to be weakened by a hole and the storage does not require any additional bolts which would have to be secured in a space-consuming manner.
  • connection stubs which can be pivoted relative to one another penetrate the joint housing in slots, can serve at least one slot end as an end stop for one of the connection stubs in the position of use to relieve force.
  • a free end of a connection stub can rest on the inside of the joint housing in its end position in the use position, so that the forces which occur during a load do not have to be transmitted through the tab, but are absorbed directly by the joint housing.
  • Sufficient space for the dimension of the arm ends can be achieved in that one of these arm ends has a tooth-gap-like recess for the free pivoting of the arm end of the other connecting piece, with a boundary surface of this recess possibly being present at the other arm end in the position of use and being at the same time can support direct power transmission.
  • the joint housing 1 consists of two mirror-image joint housing parts, to which a connecting stub 2 is molded for a seat (not shown).
  • a connecting stub 2 is molded for a seat (not shown).
  • two further connection stubs can each be pivoted relative to one another by approximately 90 ° to 120 ° 3, 4 for - also not shown - a backrest and a rear foot mounted on bearing bolts 5, 6, the two-shell joint housing 1 being firmly closed at the same time by caulking these bearing bolts 5, 6.
  • the arm ends 7, 8, which are at least partially protected in the joint housing 1, are coupled to one another via a tab 9 in the articulation points 10, 10 1 .
  • the coupling itself can be carried out by means of bolts or, as shown in FIG. 3, by means of circular cylindrical formations 11, 12 of the arm ends 7, 8, which protrude into an opening 13 in the tab 9.
  • connection stubs 3, 4 are composed of two mirror images of molded and stamped sheet metal parts.
  • the part protruding through the slots 14, 15 in the joint housing 1 is flat with raised edges 16 which abut one another, so that the tab 9 can be accommodated in the intermediate space formed thereby.
  • the arm ends 7, 8, which are of flat design, can slide on the joint housing side walls 17, which are also of flat design, and are guided there in such a way that buckling is largely prevented under high loads.
  • the slot ends 14 1 , 15 ' serve as an end stop of the stub axles 3 and 4 in their use position.
  • the bearing pin 5 In the lie the bearing pin 5, the pivot point 10 of the tab on the stub 3 and the Articulation point 10 'of the tab on the stub 4 approximately on a connecting line 21, as shown in Fig. 1.
  • the connecting stub 4 experiences a moment in the folding direction for a rear foot, then the joint of the joint is blocked by the aligned position of the tab 9 between the articulation point 10 'and the bolt 5. This blocking is particularly advantageous even when the backrest is not loaded, so that even when the loaded folding chair tilts, no dangerous folding can take place.
  • the articulation point 10 is located in the direction away from the bolt b outside the connecting line 21 of the bolt 5, with the articulation point 10 ', so that when the connection stub 4 has a moment in the closing direction, the connection stub 3 for the backrest even experiences a moment, albeit a small one, through which the connecting stub 3 is pressed against the slot end 14 1 .
  • a folding of the chair can easily be done by pivoting the non-blocked connection stub 3 by touching the backrest and seat, in which case the articulation point 10 'is pivoted so far into the articulated housing 1 in the storage position that it almost connects the connecting line 22 of the bolt 3 and the Articulation point 10 of the tab 9 reached at the stub 3.
  • the connecting stubs 2 to 4 are of similar design, but the connecting stubs 3 and 4 are practically two-armed and the articulation points 10, 10 1 are arranged on the arm ends.
  • the slot ends 14 ', 15' serve as an end stop for the stub axles 3 and 4 in their use position.
  • the free arm end 7 of the connection stub 3 can rest against the inside of the joint housing 1, so that practically no force has to be transmitted through the tab 9 in the use position.
  • a recess 18 and a corresponding projection 19 can be provided on the arm end 8 and on the arm end 7, oie are shaped so that they serve as mutual stops against pivoting of the connecting stubs 2, 3 at the end of the movement when the use position is reached.
  • the recess 18 and the projection 19 may be arranged so that the stub 4 supporting the rear foot is locked in its position of use against pivoting in the direction of folding. A folding of the chair is only possible by pivoting the stub 3 over the backrest, not shown.
  • the arm end 7 is provided with a recess 20 which allows the arm end 8 to pivot through.

Landscapes

  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

Bei einem Gelenk für einen Klappstuhl mit Anschlussstummeln (2, 3, 4) für einen Sitz, eine Lehne und einen hinteren Fuss, bei dem der Anschlussstummel (2) für den Sitz an ein zweischaliges Gelenkgehäuse (1) angeformt ist und die beiden anderen Anschlussstummel (3, 4) um etwa 90°-120° zwischen einer Gebrauchslage und einer Aufbewahrungslage in der die Anschlussstummel (2, 3, 4) etwa parallel zueinander verlaufend schwenkbar gelagert und über ein im Gelenkgehäuse 1 angeordnetes Getriebe miteinander gekoppelt sind, wird zur Sicherung gegen ein unbeabsichtigtes Zuklappen bei kompaktem schmutzunempfindlichen Aufbau vorgeschlagen, dass die Kopplung über eine Lasche (9) so erfolgt, dass in der aufgeklappten Endlage der schwenkbaren Anschlussstummel (3, 4) die beiden Anlenkpunkte (10, 10') der Lasche mit den schwenkbaren Anschlussstummeln (3, 4) und einer der Lagerbolzen (5 bzw. 6) eines der Anschlussstummel (3 bzw. 4) für den Fuss bzw. der Lehne etwa auf einer Verbindungslinie (21, 21') liegen.In the case of a joint for a folding chair with connection stubs (2, 3, 4) for a seat, a backrest and a rear foot, in which the connection stub (2) for the seat is molded onto a double-shell joint housing (1) and the other two connection stubs (3, 4) by about 90 ° -120 ° between a position of use and a storage position in which the connection stubs (2, 3, 4) are pivotably mounted approximately parallel to one another and are coupled to one another via a gear arranged in the joint housing 1, for securing purposes against unintentional folding in the case of a compact, dirt-insensitive structure, it is proposed that the coupling be carried out via a tab (9) in such a way that in the opened end position of the pivotable connection stub (3, 4) the two articulation points (10, 10 ') of the tab with the pivotable connection stub (3, 4) and one of the bearing bolts (5 or 6) one of the connection stubs (3 or 4) for the foot or the backrest lie approximately on a connecting line (21, 21 ') n.

Description

Die Erfindung betrifft ein Gelenk für einen Klappstuhl mit Anschlußstummeln für einen Sitz, eine Lehne und einen hinteren Fuß, wobei der Anschlußstummel für den Sitz an ein zweischaliges Gelenkgehäuse angeformt ist in dem die beiden anderen Anschlußstummel um etwa 90° bis 120° zwischen einer Gebrauchslage und einer Aufbewahrungslage, in der die Anschlußstummel etwa parallel zueinander verlaufen, schwenkbar gelagert und über ein im Gelenkgehäuse angeordnetes Getriebe miteinander gekoppelt sind.The invention relates to a joint for a folding chair with stubs for a seat, a backrest and a rear foot, the stub for the seat being molded onto a double-shell joint housing in which the other two stubs are about 90 ° to 120 ° between a position of use and a storage position in which the connection stubs run approximately parallel to one another, are pivotably mounted and are coupled to one another via a gear arranged in the joint housing.

Bei einem solchen aus der DE-PS 23 49 264 bekannten Gelenk wird das Getriebe durch ein relativ großes Bauvolumen benötigende ineinander kämmende Zahnscheiben gebildet. Eine Formgebung der Verzahnungen nach den Regeln der Verzahnungstechnik wäre zu aufwendig, so daß durch die vereinfachte Formgebung und relativ große Toleranzen ein exaktes Abwälzen nicht erreicht und örtliche Überbeanspruchungen kaum vermeidbar sind. Die Verzahnung ist gegen Schmutz anfällig.In such a joint known from DE-PS 23 49 264, the gear is formed by a toothed washer which meshes with one another and requires a relatively large structural volume. Shaping the toothing according to the rules of toothing technology would be too complex, so that the simplified shaping and relatively large tolerances do not result in precise rolling and local overstressing can hardly be avoided. The teeth are susceptible to dirt.

Aus dem deutschen Gebrauchsmuster 19 52 927 ist es bei einem Gelenk für ein Dreibeinliegebett bekannt den Anschlußstummel für die Lehne über eine Lasche mi-t dem Liegenrahmen zu koppeln, um einen ausreichenden Zwischenraum beim Zusammenklappen der Liege in ihre Aufbewahrungslage zu erhalten.From the German utility model 19 52 927 it is known for a joint for a three-leg bed to couple the stub for the backrest over a tab with the bed frame in order to obtain a sufficient space when folding the bed into its storage position.

Schließlich ist aus der DE-AS 12 53 961 noch ein kompliziert aufgebautes Gelenk für eine Liege bekannt, mit dem die Lehne in verschiedenen Schräglagen eingestellt werden kann. Dieses Gelenk ist gegen Verschmutzung besonders anfällig. Es hat ein großes Bauvolumen und viele Einzelteile.Finally, from DE-AS 12 53 961 a complicated hinge for a couch is known, with which the backrest can be adjusted in various inclined positions. This joint is particularly susceptible to contamination. It has a large build volume and many individual parts.

In Vermeidung der genannten Nachteile liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein Gelenk der eingangs genannten Art so zu verbessern, daß bei einfachem kompaktem Aufbau eine lange Lebensdauer bei geringer Verschleißanfälligkeit und Störanfälligkeit gegen Schmutz erreicht wird und in der Gebrauchslage das Gelenk gegen unbeabsichtigtes Zuklappen gesichert ist.In avoiding the disadvantages mentioned, the present invention has for its object to improve a joint of the type mentioned in such a way that with a simple compact construction a long service life with low susceptibility to wear and susceptibility to dirt is achieved and in the position of use the joint is secured against unintentional folding is.

Zur Lösung dieser Aufgabe sieht die Erfindung vor, daß die Kopplung über eine Lasche so erfolgt, daß in der aufgeklappten Endlage der schwenkbaren Anschlußstummel die beiden Anlenkpunkte der Lasche mit den schwenkbaren Anschlußstummeln und einer der Lagerbolzen eines der Anschlußstummel für den Fuß bzw. der Lehne etwa in einer Verbindungslinie liegen. Eine optimale Ausnutzung des maximal zur verfügung stehenden Schwenkwinkels kann daourch erreicht werden, daß in der zusammengeklappten Endlage der Anschlußstummel die beiden Anlenkpunkte der Lasche mit den schwenkbaren Anschlußstummeln und der Lagerbolzen aes Anschlußstummels für den Fuß bzw. die Lehne ebenfalls in etwa nahe einer Verbindungslinie liegen, wobei aber der Anlenkpunkt der Lasche auf der gleichen Seite der Verbindungslinie liegt wie der nicht auf der Verbindungslinie liegende Lagerbolzen.To achieve this object, the invention provides that the coupling is carried out so that in the opened end position of the pivotable stub the two articulation points of the tab with the pivotable stubs and one of the bearing bolts of one of the stubs for the foot or the backrest approximately lie in a connecting line. An optimal use of the maximum available swivel angle can be achieved by d ate in the folded end position of the connection stub the two articulation points of the bracket with the swiveling connection stubs and the bearing bolts of the connection stub for the foot or the backrest also approximately in the vicinity of a connecting line lie, but the pivot point of the tab is on the same side of the connecting line as the bearing pin not lying on the connecting line.

Durch diese Anordnung läßt sich eine optimale Kraftübertragung beim öffnen und Schließen mit Krafteinleitung an der Lehne ohne besonderen Führungen erreichen.This arrangement allows optimal power transmission when opening and closing with force transmission on the backrest without special guides.

In besonders voreilhafter Weise kann zur Erreichung einer Sperre gegen unerwünschtes Zuklappen in der Gebrauchslage in dieser einer der Anlenkpunkte knapp neDen der Verbindungslinie der beiden Anlenkpunkte der Lasche und des Lagerbolzens, des in seiner Bewegung zu sperrender Anschlußstummels liegen und zwar so, daß die Verbindungslinie zwischen dem Lagerbolzen und dem zu sperrenden Anschlußstummel und dem Anlenkpunkt der Lasche mit dem zu sperrenden Anschlußstummel liegt.In a particularly premature manner, in order to achieve a lock against undesired collapse in the position of use in this one of the articulation points, just below the connecting line between the two articulation points of the link plate and the bearing bolt, the connecting stub to be blocked in its movement lie in such a way that the connecting line between the Bearing pin and the stub to be locked and the pivot point of the tab with the stub to be locked.

Besonders Material und Konstruktionsvolumen sparend können aie Bolzen der Anlenkpunkte der Lasche als eine kreiszylindrische Ausformung ausgebildet sein, auf denen die Lasche gelagert ist. Die Armenden müssen dann nicht durch eine Bohrung geschwächt werden und die Lagerung benötigt keine zusätzlichen Bolzen, die platzraubend, lagegesichert werden müßten.In particular, to save material and construction volume, the bolts of the articulation points of the bracket can be designed as a circular cylindrical shape on which the bracket is mounted. The arm ends then do not have to be weakened by a hole and the storage does not require any additional bolts which would have to be secured in a space-consuming manner.

Eine Erhöhung der Stabilität des Gelenks, bei dem die gegeneinander schwenkbaren Anschlußstummel das Gelenkgehäuse in Schlitzen durchdringen, kann kräfteentlastend in der Gebrauchsstellung mindestens ein Schlitzende als Endanschlag für einen der Anschlußstummel dienen. Zur weiteren Herabsetzung der Beanspruchung kann in der Gebrauchsstellung ein freies Ende eines Anschlußstummels auf der Innenseite des Gelenkgehäuses in seiner Endlage anliegen, so daß die auftretenden Kräfte bei einer Belastung nicht durch die Lasche übertragen werden müssen, sondern direkt vom Gelenkgehäuse aufgenommen werden.An increase in the stability of the joint, in which the connection stubs which can be pivoted relative to one another penetrate the joint housing in slots, can serve at least one slot end as an end stop for one of the connection stubs in the position of use to relieve force. To further reduce the stress, a free end of a connection stub can rest on the inside of the joint housing in its end position in the use position, so that the forces which occur during a load do not have to be transmitted through the tab, but are absorbed directly by the joint housing.

Ausreichend Platz für die Abmessung der Armenden kann dadurch erreicht werden, daß eines dieser Armenden eine zahnlückenartige Aussparung aufweist, für das freie Durchschwenken des Armendes des anderen Anschlußstutzens, wobei ggf. gleichzeitig eine Begrenzungsfläche dieser Aussparung sich in der Gebrauchsstellung am anderen Armende anliegt und sich zur direkten Kraftübertragung abstützen kann.Sufficient space for the dimension of the arm ends can be achieved in that one of these arm ends has a tooth-gap-like recess for the free pivoting of the arm end of the other connecting piece, with a boundary surface of this recess possibly being present at the other arm end in the position of use and being at the same time can support direct power transmission.

Weitere erfindungsgemäße Ausbildungen sind den Unteransprüchen zu entnehmen und werden mit ihren Vorteilen in der nachstehenden Beschreibung näher erläutert. In den Beigefügten Zeichnungen zeigt:

  • Figur 1 eine Ansicht eines Gelenks in der Gebrauchsstellung mit teilweiser Weglassung, einer Gelenkgehäusehälfte,
  • Figur 2 eine entsprechende Darstellung in der Aufbewahrungsstellung und
  • Figur 3 einen Teilschnitt entlang der Linie III-III in Fig. 2.
  • Figur 4 eine Ansicht einer anderen Ausführungsform eines Gelenks in der Gebrauchsstellung mit teilweiser Weglassung einer Gelenkgehäusehälfte und
  • Figur 5 eine entsprechende Darstellung des in Figur 4 dargestellten Gelenks in der Aufdewahrungsstellung.
Further designs according to the invention can be found in the subclaims and their advantages are explained in more detail in the description below. In the accompanying drawings:
  • FIG. 1 shows a view of a joint in the use position with partial omission, one half of the joint housing,
  • Figure 2 is a corresponding representation in the storage position and
  • FIG. 3 shows a partial section along the line III-III in FIG. 2.
  • Figure 4 is a view of another embodiment of a joint in the use position with partial omission of a joint housing half and
  • Figure 5 is a corresponding representation of the joint shown in Figure 4 in the storage position.

Für beide in den Figuren dargestellten Ausführungsformen werden für die entsprechenden Teile die gleichen Bezugszeichen verwendet. Beim in den Figuren 1 bis 3 dargestellten ersten Ausführungsbeispiel besteht das Gelenkgehäuse 1 aus zwei spiegelbildlichen Gelenkgehäuseteilen, an die ein Anschlußstummel 2 für einen nicht dargestellten Sitz angeformt ist. Im Gelenkgehäuse 1 sind jeweils um etwa 90°- 120° gegeneinander verschwenkbar zwei weitere Anschlußstummel 3, 4 für - ebenfalls nicht dargestellt - eine Lehne und einen hinteren Fuß auf Lagerbolzen 5, 6 gelagert, wobei durch Verstemmen dieser Lagerbolzen 5, 6 gleichzeitig das zweischalige Gelenkgehäuse 1 fest verschlossen ist.For both embodiments shown in the figures, the same reference numerals are used for the corresponding parts. In the first exemplary embodiment shown in FIGS. 1 to 3, the joint housing 1 consists of two mirror-image joint housing parts, to which a connecting stub 2 is molded for a seat (not shown). In the joint housing 1 two further connection stubs can each be pivoted relative to one another by approximately 90 ° to 120 ° 3, 4 for - also not shown - a backrest and a rear foot mounted on bearing bolts 5, 6, the two-shell joint housing 1 being firmly closed at the same time by caulking these bearing bolts 5, 6.

Bei den schwenkbaren Achsstummeln 3,4 sind die im Gelenkgehäuse 1 wenigstens teilweise geschützten Armenden 7, 8 über eine Lasche 9 in den Anlenkpunkten 10, 101 miteinander gekoppelt . Die Koppelung selbst kann über Bolzen oder wie in Fig. 3 dargestellt, über kreiszylindrische Ausformungen 11, 12 der Armenden 7,8 erfolgen, die in einen Durchbrüche 13 der Lasche 9 hineinragen.In the case of the pivotable stub axles 3, 4, the arm ends 7, 8, which are at least partially protected in the joint housing 1, are coupled to one another via a tab 9 in the articulation points 10, 10 1 . The coupling itself can be carried out by means of bolts or, as shown in FIG. 3, by means of circular cylindrical formations 11, 12 of the arm ends 7, 8, which protrude into an opening 13 in the tab 9.

Die Anschlußstummel 3, 4 sind aus zwei spiegelbildlich aus geformten und gestanzten Blechteilen zusammengesetzt. Dabei ist der im Gelenkgehäuse 1 durch Schlitze 14, 15 hineinragende Teil flach ausgebildet mit hochgezogenen Rändern 16, die aneinander anliegen, so daß im dadurch gebildeten Zwischenraum die Lasche 9 Platz findet. Die so flach ausgebildeten Armenden 7, 8 können an den ebenfalls flach ausgebildeten Gelenkgehäuseseitenwänden 17 gleiten und sind dort so geführt, aaß bei hoher Belastung ein Ausknicken weitgehend verhindert ist.The connection stubs 3, 4 are composed of two mirror images of molded and stamped sheet metal parts. In this case, the part protruding through the slots 14, 15 in the joint housing 1 is flat with raised edges 16 which abut one another, so that the tab 9 can be accommodated in the intermediate space formed thereby. The arm ends 7, 8, which are of flat design, can slide on the joint housing side walls 17, which are also of flat design, and are guided there in such a way that buckling is largely prevented under high loads.

Wie aus Figur 1 ersichtlich, dienen die Schlitzenden 141, 15' als Endanschlag der Achsstummel 3 bzw. 4 in deren Gebrauchsstellung. In der liegen der Lagerbolzen 5, der Anlenkpunkt 10 der Lasche am Anschlußstummel 3 und der Anlenkpunkt 10' der Lasche am Anschlußstummel 4 etwa auf einer Verbindungslinie 21, wie dies in Fig. 1 dargestellt ist. Erfährt nun der Anschlußstummel 4 für einen hinteren Fuß ein Moment in Zuklapprichtung, so erfolgt durch die fluchtende Lage der Lasche 9, zwischen dem Anlenkpunkt 10' und dem Bolzen 5, eine Blockierung des Gelenks. Diese Blockierung besteht besonders vorteilhaft auch bei unbelasteter Lehne, so daß auch bei einem Wippen des belasteten Klappstuhls kein gefährliches Zusammenklappen erfolgen kann. Diese Sicherheit kann noch weiter dadurch gesteigert werden, daß der Anlenkpunkt 10 in Richtung weg vom Bolzen b außerhalb der Verbindungslinie 21 des Bolzenzs 5, mit dem Anlenkpunkt 10' liegt, so daß wenn auf den Anschlußstummel 4 ein Moment in Schließrichtung auftritt der Anschlußstummel 3 für die Lehne sogar noch ein wenn auch kleines Moment erfährt, durch das der Anschlußstummel 3 an dem Schlitzende 141 angedrückt wird. Ein Zusammenklappen des Stuhls kann leicht durch Verschwenken des nicht blockierten Anschlußstummels 3 durch Anfassen von Lehne und Sitzes erfolgen, wobei dann in der Aufbewahrungslage der Anlenkpunkt 10' so weit in das Gelenkgehäuse 1 eingeschwenkt wird, daß er fast die Verbindungslinie 22 des Bolzens 3 und des Anlenkpunkts 10 der Lasche 9 am Anschlußstummel 3 erreicht. Hierdurch wird durch die nahezu gestreckte Lage der Lasche 9 und der Verbindung des Anlenkpunkts 10' mit dem Bolzen 6 ein relativ großes Schließmoment erreicht, so daß in dieser Lage die Anschlußstummel 2,3,4 in ihrer parallelen Lage gehalten sind. Zum gegenseitigen Durchschwenken der Armenden 7 und 8 sind ab dort Aussparungen 18 und 20 vorgesehen.As can be seen from Figure 1, the slot ends 14 1 , 15 'serve as an end stop of the stub axles 3 and 4 in their use position. In the lie the bearing pin 5, the pivot point 10 of the tab on the stub 3 and the Articulation point 10 'of the tab on the stub 4 approximately on a connecting line 21, as shown in Fig. 1. If the connecting stub 4 experiences a moment in the folding direction for a rear foot, then the joint of the joint is blocked by the aligned position of the tab 9 between the articulation point 10 'and the bolt 5. This blocking is particularly advantageous even when the backrest is not loaded, so that even when the loaded folding chair tilts, no dangerous folding can take place. This security can be further increased in that the articulation point 10 is located in the direction away from the bolt b outside the connecting line 21 of the bolt 5, with the articulation point 10 ', so that when the connection stub 4 has a moment in the closing direction, the connection stub 3 for the backrest even experiences a moment, albeit a small one, through which the connecting stub 3 is pressed against the slot end 14 1 . A folding of the chair can easily be done by pivoting the non-blocked connection stub 3 by touching the backrest and seat, in which case the articulation point 10 'is pivoted so far into the articulated housing 1 in the storage position that it almost connects the connecting line 22 of the bolt 3 and the Articulation point 10 of the tab 9 reached at the stub 3. As a result, the almost extended position of the tab 9 and the connection of the articulation point 10 'with the bolt 6 achieve a relatively large closing torque, so that in this position the connecting stubs 2, 3, 4 in their parallel position are held. Recesses 18 and 20 are provided from there for mutual pivoting of the arm ends 7 and 8.

Beim in den Figuren 4 und 5 dargestellten weiteren Ausführungsbeispiel sind die Anschlußstummel 2 bis 4 ähnlich ausgebildet, wobei allerdings die Anschlußstummel 3 und 4 praktisch zweiarmig ausgebildet und die Anlenkpunkte 10, 101 an den Armenden angeordnet sind. Auch hier dienen, wie aus der Figur 4 ersichtlich ist, die Schlitzenden 14',15' als Endanschlag der Achsstummel 3 bzw. 4 in deren Gebrauchsstellung. Gleichzeitig kann das freie Armende 7 des Anschlußstummels 3 innen am Gelenkgehäuse 1 anliegen, so daß in der Gebrauchsstellung durch die Lasche 9 praktisch keine Kraft übertragen werden muß. Zur weiteren Entlastung kann am Armende 8 eine Aussparung 18 und am Armende 7 ein entsprechender Vorsprung 19 vorgesehen sein, oie so geformt sind, daß sie als gegenseitige Anschläge dienen gegen ein Weiterschwenken der Anschlußstummel 2, 3 am Ende der Bewegung beim Erreichen der Gebrauchsstellung. Die Aussparung 18 und der Vorsprung 19 Können so angeordnet sein, daß der den hinteren Fuß tragende Anschlußstummel 4 in seiner Gebrauchslage gegen ein Verschwenken in Zusammenklapprichtung arretiert ist. Ein Zusammenklappen des Stuhls ist nur durch Schwenken des Anschlußstummels 3 über die nicht dargestellte Lehne möglich. In Verlängerung des Vorsprungs 19 ist das Armende 7 mit einer Aussparung 20 versehen, die ein Durchschwenken des Armendes 8 erlaubt.In the further exemplary embodiment shown in FIGS. 4 and 5, the connecting stubs 2 to 4 are of similar design, but the connecting stubs 3 and 4 are practically two-armed and the articulation points 10, 10 1 are arranged on the arm ends. Here too, as can be seen from FIG. 4, the slot ends 14 ', 15' serve as an end stop for the stub axles 3 and 4 in their use position. At the same time, the free arm end 7 of the connection stub 3 can rest against the inside of the joint housing 1, so that practically no force has to be transmitted through the tab 9 in the use position. For further relief, a recess 18 and a corresponding projection 19 can be provided on the arm end 8 and on the arm end 7, oie are shaped so that they serve as mutual stops against pivoting of the connecting stubs 2, 3 at the end of the movement when the use position is reached. The recess 18 and the projection 19 may be arranged so that the stub 4 supporting the rear foot is locked in its position of use against pivoting in the direction of folding. A folding of the chair is only possible by pivoting the stub 3 over the backrest, not shown. In extension of the projection 19, the arm end 7 is provided with a recess 20 which allows the arm end 8 to pivot through.

Claims (10)

1. Gelenk für einen Klappstuhl mit Anschlußstummeln (2,3,4) für einen Sitz, eine Lehne und einen hinteren Fuß, wobei der Anschlußstummel (2) für den Sitz an ein zweischaliges Gelenkgehäuse (1) angeformt ist, in dem die beiden anderen Anschlußstummel (3,4) um etwa 900 - 120° zwischen einer Gebrauchslage und einer Aufbewahrungslage in der die Anschlußstummel (2,3,4) etwa parallel zueinander verlaufend schwenkbar gelagert und über ein im Gelenkgehäuse 1 angeordnetes Getriebe miteinander gekoppelt sind, dadurch gekennzeichnet, daß die Kopplung über eine Lasche (9) so erfolgt, daß in der aufgeklappten Endlage der schwenkbaren Anschlußstummel (3,4) die beiden Anlenkpunkte (10,10') der Lasche mit den schwenkbaren Anschlußstummeln (3,4) und einer der Lagerbolzen (5 bzw. 6) eines der Anschlußstummel (3 bsw. 4) für den Fuß bzw. der Lehne etwa in eine Verbindungslinie (21,21') liegen.1. Articulation for a folding chair with connecting stubs (2,3,4) for a seat, a backrest and a rear foot, the connecting stub (2) for the seat being molded onto a double-shell articulated housing (1) in which the other two Connection stub (3, 4) by approximately 90 ° to 120 ° between a position of use and a storage position in which the connection stubs ( 2, 3, 4) are pivotably mounted approximately parallel to one another and are coupled to one another via a gear arranged in the joint housing 1, characterized that the coupling via a tab (9) is such that in the opened End position of the pivotable connection stub (3,4), the two articulation points (10,10 ') of the bracket with the pivotable connection stub (3,4) and one of the bearing bolts (5 or 6) one of the connection stub (3 or 4) for the The foot or the back rest approximately in a connecting line (21, 21 '). 2. Gelenk nach Anspruch 1, dadurch gekennzeichnet, daß in der zusammengeklappten Endlage der Anschlußstummel (3,4), die beiden Anlenkpunkte (10, 10') der Lasche (9) mit den schwenkbaren Anschlußstummeln (3,4) und der Lagerbolzen (6 bzw. 5) des Anschlußstummels (3 bzw. 4) für den Fuß bzw. die Lehne ebenfalls in etwa nahe einer Verbindungslinie (22,22') liegen, wobei aber der Anlenkpunkt (10, 10') der Lasche (9) auf der gleichen Seite der Verbindungslinie (22,22') liegt, wie der nicht auf der Verbindungslinie (22, 22') liegende Lagerbolzen (5 bzw. 6).2. Joint according to claim 1, characterized in that in the folded end position of the connection stub (3, 4), the two articulation points (10, 10 ') of the tab (9) with the pivotable connection stubs (3, 4) and the bearing bolt ( 6 or 5) of the connecting stub (3 or 4) for the foot or the backrest are also approximately close to a connecting line (22, 22 '), but with the articulation point (10, 10') of the tab (9) is on the same side of the connecting line (22, 22 ') as the bearing pin (5 or 6) which is not on the connecting line (22, 22'). 3. Gelenk nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zur Erreichung einer Sperre gegen unerwünschtes Zuklappen in der Gebrauchslage einer der Anlenkpunkte (10 bzw. 10') knapp neben der Verbindungslinie (21 bzw. 21') des anderen Anlenkpunkts (10', 10) der Lasche (9) und des Lagerbolzens (5 bzw. 6) des in seiner Bewegung nicht zu sperrenden Anschlußstummels (3,4) liegt und zwar so, daß der eine Anlenkpunkt (10 bzw. 10') der Lasche (9) einerseits der Verbindungslinie (21,21') und der Lagerbolzen (6 bzw. 5) des zu sperrenden Anschlußstummels (4) auf der anderen Seite der Verbindungslinie (21,21') liegt.3. Joint according to claim 1 or 2, characterized in that to achieve a lock against unwanted folding in the position of use one of the articulation points (10 or 10 ') just next to the connecting line (21 or 21') of the other articulation point (10 ' , 10) of the tab (9) and the bearing pin (5 and 6) of the stub (3, 4), which cannot be blocked in its movement, and in such a way that the one articulation point (10 or 10 ') of the tab (9 ) on the one hand the connecting line (21, 21 ') and the bearing bolts (6 and 5) of the connecting stub (4) to be blocked is on the other side of the connecting line (21, 21'). 4. Gelenk nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Bolzen der Anlenkpunkte (10,10') der Lasche (9) als eine kreiszylindrische Ausformung (11,12) ausgebildet sind, auf denen die Lasche (9) gelagert ist (Fig. 3).4. Joint according to claim 1 or 2, characterized in that the bolts of the articulation points (10, 10 ') of the tab (9) are designed as a circular cylindrical shape (11, 12) on which the tab (9) is mounted ( Fig. 3). 5. Gelenk nach einem der Ansprüche 1 bis 3, bei dem die gegeneinander schwenkbaren Anschlußstummel (3,4) das Gelenkgehäuse (1) in Schlitzen (14,15) durchragen, dadurch gekennzeichnet, daß in der aufgeklappten Gebrauchsstellung mindestens ein Schlitzende (14',15') als Endanschlag für einen Anschlußstummel (3,4) dient (Figur 1 oder 4).5. Joint according to one of claims 1 to 3, in which the mutually pivotable connection stub (3, 4) project through the joint housing (1) in slots (14, 15), characterized in that in the opened use position, at least one slot end (14 ' , 15 ') serves as an end stop for a connection stub (3, 4) (FIG. 1 or 4). 6. Gelenk nach Anspruch 5, dadurch gekennzeichnet, daß die beiden gegeneinander schwenkbaren Anschlußstummel (3,4) für die Lehne und den hinteren Fuß jeweils zweiarmig ausgebildet sind und daß in der aufgeklappten Gebrauchsstellung das freie Armende (7) des Anschlußstummels (3) der Lehne auf der Innenseite des Gelenkgehäuses (1) in seiner Endlage anliegt (Figur 4).6. Joint according to claim 5, characterized in that the two mutually pivotable connection stubs (3,4) for the back and the rear foot are each formed with two arms and that in the unfolded position of use, the free arm end (7) of the connection stub (3) Rest on the inside of the joint housing (1) in its end position (Figure 4). 7. Gelenk nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, aaß das Armende (7) des Anschlußstummels (3) für die Lehne eine Aussparung (20) aufweist, für das freie Durchschwenken des Armendes (8) des Anschlußstummels (4) für den Fuß.7. Joint according to one of claims 1 to 6, characterized in that the arm end (7) of the connecting stub (3) for the backrest has a recess (20) for the free pivoting of the arm end (8) of the connecting stub (4) for the foot. 8. Gelenk nach Anspruch 7, dadurch gekennzeichnet, daß eine Begrenzungsfläche dieser Aussparung (20) in der aufgeklappten Gebrauchsstellung am anderen Armende (8) anliegt und sich abstützt und daß ferner die Armenden (7,8) der Anschlußstummel (3,4) für Lehne und Fuß eine Aussparung (18) bzw. einen Vorsprung (19) aufweisen, die in der Gebrauchslage ineinander greifend als zusätzliche Begrenzungsanschläge dienen (Figur 4).8. Joint according to claim 7, characterized in that a boundary surface of this recess (20) in the unfolded position of use rests on the other arm end (8) and is supported and that the arm ends (7,8) of the connecting stub (3,4) for The backrest and foot have a recess (18) or a projection (19) which, in the use position, serve as additional limiting stops (FIG. 4). 9. Gelenk nach einem der Ansprüche 7 oder 8, dadurch gekennzeichnet, daß durch das Ineinandergreifen von Aussparung (18) und Vorsprung (19) der Anschlußstummel (4) für den hinteren Fuß in seiner Schwenkfreiheit arretiert ist.9. Joint according to one of claims 7 or 8, characterized in that the interlocking of recess (18) and projection (19) of the connecting stub (4) for the rear foot is locked in its pivoting freedom. 10. Gelenk nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß das Armende (8) des Anschlußstummels (4) für den Fuß eine Aussparung (18) aufweist, für das freie Durchschwenken des Armendes (7) des Anschlußstummels (3) für die Lehne.10. Joint according to one of claims 1 to 9, characterized in that the arm end (8) of the connecting stub (4) for the foot has a recess (18) for the free pivoting of the arm end (7) of the connecting stub (3) for the rest.
EP86104092A 1985-03-28 1986-03-25 Pivot for a folding chair Expired - Lifetime EP0196067B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3511238 1985-03-28
DE19853511238 DE3511238A1 (en) 1985-03-28 1985-03-28 JOINT FOR A FOLDING CHAIR

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EP0196067A2 true EP0196067A2 (en) 1986-10-01
EP0196067A3 EP0196067A3 (en) 1987-05-27
EP0196067B1 EP0196067B1 (en) 1990-10-03

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EP86104092A Expired - Lifetime EP0196067B1 (en) 1985-03-28 1986-03-25 Pivot for a folding chair

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EP (1) EP0196067B1 (en)
DE (2) DE3511238A1 (en)

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US20020014791A1 (en) * 2000-02-24 2002-02-07 Choi Sang Byong Reclining chair
AU2001296422A1 (en) 2000-10-04 2002-04-15 North Pole Ltd. Two-position collapsible recliner
US7100739B2 (en) * 2004-05-14 2006-09-05 Werner Co. Step stool, hinge and method
WO2006039578A2 (en) * 2004-10-01 2006-04-13 Pedemonte Daniel G Multi-function transportable recreation chair
US20080256747A1 (en) * 2007-04-19 2008-10-23 Hsien-Wen Chang Hinge device of a foldable chair
US20140132041A1 (en) * 2012-11-13 2014-05-15 Dave Manus Chair to Optimize Sun Exposure
KR101763026B1 (en) * 2015-09-11 2017-07-28 주식회사 엑시옴 Center fold Table Tennis Table
US10405662B2 (en) * 2017-03-02 2019-09-10 Rio Brands, Llc Folding X-frame chair with extended backrest
US10321750B2 (en) 2017-05-17 2019-06-18 Lido Holdings, Inc. Combined foldable chair and storage backpack
US10765584B2 (en) * 2019-01-03 2020-09-08 Shanq-Ching Shieh Foldable frame construction for mobility aids

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FR2312996A1 (en) * 1975-06-04 1976-12-31 Schnuettgen Alfred Double hinge for camp bed frame - has meshing toothed wheels at joints of legs and frame members

Also Published As

Publication number Publication date
US4684278A (en) 1987-08-04
EP0196067B1 (en) 1990-10-03
DE3511238A1 (en) 1986-10-09
EP0196067A3 (en) 1987-05-27
DE3674612D1 (en) 1990-11-08

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