EP0406706B1 - Locking device for chairs, especially office chairs - Google Patents
Locking device for chairs, especially office chairs Download PDFInfo
- Publication number
- EP0406706B1 EP0406706B1 EP90112383A EP90112383A EP0406706B1 EP 0406706 B1 EP0406706 B1 EP 0406706B1 EP 90112383 A EP90112383 A EP 90112383A EP 90112383 A EP90112383 A EP 90112383A EP 0406706 B1 EP0406706 B1 EP 0406706B1
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- European Patent Office
- Prior art keywords
- blocking
- locking
- bolt
- disposed
- members
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
Definitions
- the invention relates to a locking device for chairs, in particular office chairs according to the preamble of the main claim, namely for chairs on which the seat and / or the backrest are cushioned adjustable with respect to the chair frame and can be locked in at least one position with a locking device on the frame.
- Tilt-adjustable work or office chairs are known in the most varied of shapes and equipped with a wide variety of adjustment mechanisms, and usually a suspension comfort is also provided, which is achieved by springs included in the adjustment mechanism. Such chairs must be lockable in the normal or rest position and, if desired, also in further intermediate positions, provided that the area outside the normal position is not intended to act as an elastically sprung area. Locking devices on such chairs are also known in the most varied of embodiments, as a rule in the respective adaptation and integration to the respective adjustment mechanism or the given structural design of the chairs.
- an incline-adjustable chair with a locking device in which two identical locking members, which are spaced apart from one another and are inclined in the same direction and are arranged at an inclination in the same direction and are fixedly inclined in the same direction, with their identical, s -shaped slots encompass a locking pin on the chair frame.
- a blocking of the locking position within the locking device is not possible and without additional locking means, but which could only be provided on the actuating lever, a securely blocked locking position is not guaranteed.
- this is intended at all, only a very limited number of engagement recesses for several locking positions could be accommodated in locking devices of this type, since the locking lugs between two recesses must have enough "meat" for reasons of stability.
- the locking device Due to the design of the locking device according to the invention, it is only loosely attached to the aforementioned axis or the axle piece and is only connected to the entire actuating mechanism at this point, assumes an exposed position to this extent and can therefore also be installed very easily.
- the locking device is preferably designed in such a way that one locking member is dimensioned a maximum of twice as wide as the other and is provided with a recess which forms a groove with the other locking member, in which a two-armed pivot lever is mounted on the wider locking member, the lower lever arm with a driving pin in a slot guide of the narrower locking member engages and on whose other lever arm the actuator attached to the wider locking member engages and between the and the wider locking member the spring is arranged clamped.
- the two-armed swivel lever can advantageously be integrated into the locking device, which facilitates the unlocking of the lock.
- the locking device is in principle very simple and in particular can only be coupled at one point to a part of the seat and / or the backrest that is inclined, i.e. does not require any specific adaptation to the adjustment mechanism, such a locking device can be largely independent of the specific design of the adjustment mechanisms of chairs of this type are used.
- the bearing eyes of the two locking members receiving the axis are advantageously closed with detachable bearing covers.
- the backrest 2 which is kinked under the seat 1, pivots about the joint I and the seat 1, in addition somewhat displaceably about the joint II, the seat 1 and the backrest 2 being articulated with one another in the axis 3 are coupled. If the backrest 2 is inclined in the direction of the arrow C, the seat 1 is accordingly taken along in the direction of the arrow D.
- the locking device is articulated on the axis 3 and, like a clamp, comprises the locking bolt 6 arranged stationary on the frame 7.
- the locking device can be pivoted from two relative to one another about the common axis 3, which belongs to the seat 1 and in this case also to the backrest 2 and can be moved therewith by means of an actuator 4, formed against each other with a spring 5 to the locking pin 6 of the frame 7 in the locking position and provided with mutually aligned locking slots 8, 9 locking members 10, 11.
- the locking slots 8, 9 are penetrated by the locking pin 6 and have a length L which corresponds to the predetermined maximum inclination setting of the seat and backrest.
- the outer contours of the two locking members 10 and 11 are concerned, they are identical, as can be seen from FIG. 6, which corresponds to the locking position of both locking members.
- the locking slot 8 in the locking member 10 according to FIG. 2 has the shape shown, it being essential that in the lower region a locking lug 14 projects into the slot. Notwithstanding this, the locking slot 9 is formed in the other locking member 11, which is a simple slot slot, at the lower end of which a cross section of the locking pin 6 adapted lateral recess 9 'is provided, through which the locking lug 15 is limited at the bottom. It is also essential that the locking lug 15 is arranged radially higher than the other locking lug 14 on the locking member 10 about the locking pin cross-section with respect to the common axis 3. If these locking members 10, 11 are placed immediately adjacent to one another on the axis 3, then they turn this in the sense of FIG. 6, which corresponds to the locked position.
- the locking pin is encompassed or clasped by the two locking lugs 14, 15, which means that the axis 3 can no longer move with respect to the locking pin 6, ie seat 1 and backrest 2 are also blocked in normal or rest position.
- the compression spring 5, which spreads itself on the locking members 10, 11, cannot have an effect on the locking members, since this is opposed by the locking bolt 6 passing through the locking members.
- the one locking member 11 is dimensioned approximately twice as wide as the other and provided with a recess 16 (FIG.
- an actuating lever arranged on the side of the chair is designed, for example, in the form of a construction train Actuator 4 actuated and compressed by the pivot lever 19, the compression spring. Since the pivot lever 18 is mounted on the wider locking member 11 with a bolt 24 and on the other hand engages with a driver pin 20 in the slot guide 21 of the narrower locking member 12, the locking members are pivoted relative to one another and with respect to the locking bolt so that the two locking lugs 14, 15th release the locking bolt, the two locking slots 8, 9 being assigned to each other in such a way that there is an elongated hole guide for the locking bolt, the flanks of which are formed on the one hand by the edge 8 'of the locking slot 8 and on the other hand by the edge 13' of the locking slot 9.
- This elongated hole defined by both locking slots has the total length L, as indicated in FIGS. 2, 4.
- a chair according to FIG. 1 with seat 1 and backrest 2 can be rocked to a certain extent, specifically in an inclination range which is predetermined by the length L of the slot.
- the backrest and seat follow the body movements by a corresponding cushioning of the adjustment mechanism, which requires no further explanation here.
- the tension cord 4 is relieved by releasing the control lever (not shown), the length of the rocking path is shortened by the cross section of the locking pin 6.
- the locking device can be further developed in such a way that in addition to the locking in the normal position, further locking positions can be assumed.
- the slot 9 there is in the flank 13 the slot 9 at least one further recess 22 and this opposite a locking bolt blocking extension 23 arranged on the slot 8 of the other locking member 10 on the opposite slot flank 12.
- the locking members 10, 11 shown in FIG. 9 and designed somewhat differently in their outer shape are in this case equipped with a compression spring 5 arranged below the locking slots.
- the locking members are of the same width, but have lateral and mutually directed extensions, between which the compression spring is arranged.
Abstract
Description
Die Erfindung betrifft eine Sperrvorrichtung für Stühle, insbesondere Bürostühle gemäß Oberbegriff des Hauptanspruches und zwar für Stühle, an denen der Sitz und/oder die Lehne in Bezug auf das Stuhlgestell neigungseinstellbar abgefedert und in mindestens einer Stellung mit einer Sperrvorrichtung am Gestell verrastbar sind.The invention relates to a locking device for chairs, in particular office chairs according to the preamble of the main claim, namely for chairs on which the seat and / or the backrest are cushioned adjustable with respect to the chair frame and can be locked in at least one position with a locking device on the frame.
Neigungseinstellbare Arbeits- bzw. Bürostühle sind in den vielgestaltigsten Formen und ausgestattet mit den unterschiedlichsten Verstellmechaniken bekannt, wobei auch in der Regel ein Federungskomfort vorgesehen ist, der durch in die Verstellmechanik einbezogene Federn erzielt wird. In der Normal- bzw. Ruhestellung müssen derartige Stühle verrastbar sein und, falls gewünscht, auch in weiteren Zwischenstellungen, sofern der Bereich außerhalb der Normalstellung nicht insgesamt als elastisch abgefederter Bereich wirken soll. Sperrvorrichtungen an derartigen Stühlen sind ebenfalls in den verschiedensten Ausführungsformen bekannt, und zwar in der Regel in jeweiliger Anpassung und Integration an die jeweilige Verstellmechanik bzw. die jeweils gegebene konstruktive Gestaltung der Stühle. So ist nach der US-A-3 627 252 ein neigungseinstellbarer Stuhl mit einer Sperrvorrichtung bekannt, bei der auf einer gemeinsamen und in einem Stellhebel auslaufenden Achse beabstandet zueinander zwei identische Sperrglieder und in gleicher Richtung geneigt fest angeordnet sind, die mit ihren identischen, s-förmig ausgebildeten Schlitzen einen Sperrbolzen am Stuhlgestell umgreifen. Eine Blockierung der Verrastungsstellung innerhalb der Sperrvorrichtung ist dabei nicht möglich und ohne zusätzliche Sperrmittel, die aber nur am Betätigungshebel vorgesehen werden könnten, ist eine sicher blockierte Verrastungsstellung nicht gewährleistet. Außerdem könnten, sofern das überhaupt beabsichtigt ist, bei Sperrvorrichtungen dieser Art nur eine sehr beschränkte Anzahl von Eingriffsausnehmungen für mehrere Raststellungen untergebracht werden, da die Sperrnasen zwischen je zwei Ausnehmungen aus Stabilitätsgründen genügend "Fleisch" haben müssen.Tilt-adjustable work or office chairs are known in the most varied of shapes and equipped with a wide variety of adjustment mechanisms, and usually a suspension comfort is also provided, which is achieved by springs included in the adjustment mechanism. Such chairs must be lockable in the normal or rest position and, if desired, also in further intermediate positions, provided that the area outside the normal position is not intended to act as an elastically sprung area. Locking devices on such chairs are also known in the most varied of embodiments, as a rule in the respective adaptation and integration to the respective adjustment mechanism or the given structural design of the chairs. Thus, according to US-A-3 627 252, an incline-adjustable chair with a locking device is known, in which two identical locking members, which are spaced apart from one another and are inclined in the same direction and are arranged at an inclination in the same direction and are fixedly inclined in the same direction, with their identical, s -shaped slots encompass a locking pin on the chair frame. A blocking of the locking position within the locking device is not possible and without additional locking means, but which could only be provided on the actuating lever, a securely blocked locking position is not guaranteed. In addition, if this is intended at all, only a very limited number of engagement recesses for several locking positions could be accommodated in locking devices of this type, since the locking lugs between two recesses must have enough "meat" for reasons of stability.
Diese Aufgabe ist mit einer Sperrvorrichtung der eingangs genannten Art nach der Erfindung durch die im Kennzeichen des Hauptanspruches angeführten Merkmale gelöst. Vorteilhafte Weiterbildungen und praktische Ausführungsformen ergeben sich nach den Unteransprüchen.This object is achieved with a locking device of the type mentioned according to the invention by the features stated in the characterizing part of the main claim. Advantageous further developments and practical embodiments result from the subclaims.
Durch diese erfindungsgemäße Ausbildung und Anordnung der Sperrvorrichtung am Stuhl ist diese lediglich am verstellbaren Sitz und/oder der Lehne und zwar an einer mit diesen Elementen beweglichen Achse bzw. Achsstück anzubringen und am stationären Verrastungsbolzen zum Eingriff zu bringen, der von den beiden Sperrgliedern klammerartig umgriffen wird. Die Feder ist dabei so angeordnet, daß dadurch die Sperrglieder an sich gespreizt würden, was aber tatsächlich nicht erfolgen kann, da dem der stationäre Sperrbolzen am Stuhlgestell entgegensteht, was noch näher erläutert wird. Dadurch kann vorteilhaft eine Druckfeder benutzt werden, die konstruktiv einfacher in der Sperrvorrichtung unterzubringen ist als eine Zugfeder.Through this inventive design and arrangement of the locking device on the chair, this is only to be attached to the adjustable seat and / or the backrest, specifically on an axle or axle piece movable with these elements, and to engage the stationary latching bolt, which is gripped by the two locking members in a clamp-like manner becomes. The spring is arranged so that this would spread the locking members per se, but this cannot actually take place since this is opposed by the stationary locking bolt on the chair frame, which will be explained in more detail. As a result, a compression spring can advantageously be used, which is structurally simpler to accommodate in the locking device than a tension spring.
Durch die erfindungsgemäße Ausbildung der Sperrvorrichtung ist diese lediglich an der vorerwähnten Achse bzw. dem Achsstück lose angebracht und steht insoweit nur an dieser Stelle mit der ganzen Stellmechanik in Verbindung, nimmt zu dieser gewissermaßen eine exponierte Stellung ein und kann demzufolge auch denkbar einfach montiert werden.Due to the design of the locking device according to the invention, it is only loosely attached to the aforementioned axis or the axle piece and is only connected to the entire actuating mechanism at this point, assumes an exposed position to this extent and can therefore also be installed very easily.
Um die Sperrvorrichtung in Rücksicht auf die beengten Raumverhältnisse unter dem Stuhlsitz so kompakt wie möglich auszubilden, ist die Sperrvorrichtung bevorzugt derart ausgebildet, daß das eine Sperrglied maximal doppelt so breit wie das andere bemessen und mit einer Ausnehmung versehen ist, die mit dem anderen Sperrglied eine Nut bildet, in der ein am breiteren Sperrglied zweiarmiger Schwenkhebel gelagert ist, dessen unterer Hebelarm mit einem Mitnehmerzapfen in eine Schlitzführung des schmaleren Sperrgliedes eingreift und an dessen anderem Hebelarm das am breiteren Sperrglied befestigte Stellglied angreift und zwischen dem und dem breiteren Sperrglied die Feder verspannt angeordnet ist. Abgesehen von der dadurch ermöglichten kompakten Bauweise kann dadurch vorteilhaft der zweiarmige Schwenkhebel mit in die Sperrvorrichtung integriert werden, was die Entriegelung der Sperre erleichtert.In order to make the locking device as compact as possible in view of the limited space under the chair seat, the locking device is preferably designed in such a way that one locking member is dimensioned a maximum of twice as wide as the other and is provided with a recess which forms a groove with the other locking member, in which a two-armed pivot lever is mounted on the wider locking member, the lower lever arm with a driving pin in a slot guide of the narrower locking member engages and on whose other lever arm the actuator attached to the wider locking member engages and between the and the wider locking member the spring is arranged clamped. Apart from the compact design made possible by this, the two-armed swivel lever can advantageously be integrated into the locking device, which facilitates the unlocking of the lock.
Da die Sperrvorrichtung im Prinzip sehr einfach ausgebildet und insbesondere nur an einer Stelle an einem sich mitneigenden Teil vom Sitz und/oder der Lehne anzukoppeln ist, also keiner spezifischen Anpassungsgestaltung an die Verstellmechanik bedarf, kann eine solche Sperrvorrichtung weitgehend unabhängig von der spezifischen Gestaltung der Stellmechaniken von Stühlen dieser Art zur Anwendung gebracht werden.Since the locking device is in principle very simple and in particular can only be coupled at one point to a part of the seat and / or the backrest that is inclined, i.e. does not require any specific adaptation to the adjustment mechanism, such a locking device can be largely independent of the specific design of the adjustment mechanisms of chairs of this type are used.
Was die in der Aufgabenstellung erwähnte Weiterbildungsmöglichkeit hinsichtlich der Schaffung mehrerer Verrastungsstellen betrifft, so ist dies durch eine Ausbildung der Sperrvorrichtung dahingehend ermöglicht, daß in der Flanke des Schlitzes mit der Sperrnase oberhalb dieser mindestens eine weitere Ausnehmung angeordnet und dieser gegenüberstehend am Schlitz des anderen Sperrgliedes ein Sperrbolzenblockierfortsatz an der gegenüberstehenden Schlitzflanke angeordnet ist.As far as the training option mentioned in the task with regard to the creation of several latching points, this is made possible by designing the locking device in such a way that at least one further recess is arranged in the flank of the slot with the locking lug above it and this is opposite the slot of the other locking member Locking pin blocking extension is arranged on the opposite slot flank.
Um die Ankopplung bzw. den Einbau einer derartigen Sperre am Stuhl noch weiter zu vereinfachen, sind die die Achse aufnehmenden Lageraugen der beiden Sperrglieder vorteilhaft mit lösbaren Lagerabdeckungen verschlossen.In order to further simplify the coupling or the installation of such a lock on the chair, the bearing eyes of the two locking members receiving the axis are advantageously closed with detachable bearing covers.
Der erfindungsgemäße Stuhl mit der zugehörigen Sperrvorrichtung wird nachfolgend anhand der zeichnerischen Darstellung von Ausführungsbeispielen näher erläutert.The chair according to the invention with the associated locking device is explained in more detail below with reference to the drawing of exemplary embodiments.
Es zeigt schematisch
- Fig. 1 in Seitenansicht und sehr stark schematisiert einen für die Sperrvorrichtung besonders geeigneten Stuhl;
- Fig. 2, 3 in Seiten- und Vorderansicht das eine Sperrglied;
- Fig. 4, 5 in Seiten- und Vorderansicht das andere Sperrglied;
- Fig. 6 die Sperrvorrichtung in Seitenansicht in gemeinsamer Anordnung der beiden Sperrglieder auf der gemeinsamen Achse und in Sperrstellung;
- Fig. 7, 8 die Sperrvorrichtung gemäß Fig. 6 in Ansichten der Pfeilrichtungen A und B und
- Fig. 9, 9A in Seitenansicht und Draufsicht eine andere Ausführungsform der Sperrglieder.
- Figure 1 in side view and very highly schematic of a chair particularly suitable for the locking device;
- Figures 2, 3 in side and front view of a locking member.
- 4, 5 in side and front view the other locking member;
- Figure 6 shows the locking device in side view in a common arrangement of the two locking members on the common axis and in the locked position.
- 7, 8 the locking device according to FIG. 6 in views of the arrow directions A and B and
- 9, 9A in side view and top view of another embodiment of the locking members.
Beim in Fig. 1 als Beispiel dargestellten Stuhl schwenkt die unter den Sitz 1 abgeknickte Rückenlehne 2 um das Gelenk I und der Sitz 1, dazu etwas querverschieblich, um das Gelenk II, wobei der Sitz 1 und die Rückenlehne 2 in der Achse 3 miteinander gelenkig gekoppelt sind. Bei Neigung der Rückenlehne 2 in Pfeilrichtung C wird also der Sitz 1 in Pfeilrichtung D entsprechend mitgenommen. Dabei ist die Sperrvorrichtung an der Achse 3 angelenkt und umfaßt klammerartig den stationär am Gestell 7 angeordneten Sperrbolzen 6.In the chair shown as an example in FIG. 1, the
Wie insbesondere aus den Fig. 2, 4 und 6 ersichtlich, ist die Sperrvorrichtung aus zwei relativ zueinander um die gemeinsame, zum Sitz 1 und in diesem Falle auch zur Lehne 2 gehörenden und mit diesen beweglichen Achse 3 mittels eines Stellgliedes 4 verschwenkbaren, gegeneinander mit einer Feder 5 zum Sperrbolzen 6 des Gestelles 7 in Sperrstellung gehaltenen und mit zueinander fluchtenden Sperrschlitzen 8, 9 versehenen Sperrgliedern 10, 11 gebildet. Die Sperrschlitze 8, 9 sind dabei vom Sperrbolzen 6 durchgriffen und weisen eine Länge L auf, die der vorgegebenen, maximalen Neigungseinstellung von Sitz und Lehne entspricht. Was die äußeren Konturen der beiden Sperrglieder 10 und 11 betrifft, so sind diese identisch, wie dies aus Fig. 6 ersichtlich ist, die der Sperrstellung beider Sperrglieder entspricht. Der Sperrschlitz 8 beim Sperrglied 10 gemäß Fig. 2 hat dabei die dargestellte Form, wobei wesentlich ist, daß im unteren Bereich eine Sperrnase 14 in den Schlitz einragt. Abweichend davon ist der Sperrschlitz 9 im anderen Sperrglied 11 ausgebildet, bei dem es sich um einen einfachen Langlochschlitz handelt, an dessen unteren Ende eine dem Querschnitt des Sperrbolzens 6 angepaßte seitliche Ausnehmung 9′ vorgesehen ist, durch die die Sperrnase 15 nach unten begrenzt wird. Wesentlich ist dabei auch, daß die Sperrnase 15 um den Sperrbolzenquerschnitt radial in Bezug auf die gemeinsame Achse 3 höher angeordnet ist als die andere Sperrnase 14 am Sperrglied 10. Setzt man diese Sperrglieder 10, 11 unmittelbar benachbart zusammen auf die Achse 3, so stellen sich diese im Sinne der Fig. 6 dar, die der Sperrstellung entspricht. Wie ebenfalls aus Fig. 6 ersichtlich, wird dabei der Sperrbolzen von den beiden Sperrnasen 14, 15 umfaßt bzw. umklammert, was bedeutet, daß sich die Achse 3 in Bezug auf den Sperrbolzen 6 nicht mehr bewegen kann, d.h., Sitz 1 und Rückenlehne 2 sind ebenfalls in Normal- bzw. Ruhestellung blockiert. Die an sich auf die Sperrglieder 10, 11 spreizend wirkende Druckfeder 5 kann sich dabei nicht auf die Sperrglieder auswirken, da dem der die Sperrglieder durchgreifende Sperrbolzen 6 entgegensteht. Beim dargestellten Ausführungsbeispiel ist das eine Sperrglied 11 etwa doppelt so breit bemessen wie das andere und mit einer Ausnehmung 16 (Fig. 7) versehen, die mit dem anderen Sperrglied 10 eine Nut 17 bildet, inder ein am breiteren Sperrglied 11 zweiarmiger Schwenkhebel 18 gelagert ist, dessen unterer Hebelarm 19 mit einem Mitnehmerzapfen 20 in eine Schlitzführung 21 des schmaleren Sperrgliedes 10 eingreift und an dessen anderem Hebelarm 19′ das am breiteren Sperrglied 11 befestigte Stellglied 4 angreift und zwischen dem und dem breiteren Sperrglied die Druckfeder 5 verspannt angeordnet ist. Was das breitere Sperrglied betrifft, so ist dieses in Einzeldarstellung aus den Fig. 4, 5 ersichtlich. In Zusammenstellung und in Ansicht gemäß Pfeil B in Fig. 6 stellen sich die beiden Sperrglieder im Sinne der Fig. 8 dar. Um die beiden Sperrglieder am Sperrbolzen 6 zu entrasten wird von einem seitlich am Stuhl angeordneten Betätigungshebel das bspw. in Form eines Bautenzuges ausgebildete Stellglied 4 betätigt und mittels des Schwenkhebels 19 die Druckfeder zusammengedrückt. Da der Schwenkhebel 18 am breiteren Sperrglied 11 mit einem Bolzen 24 gelagert und andererseits mit einem Mitnehmerzapfen 20 in die Schlitzführung 21 des schmaleren Sperrgliedes 12 eingreift, werden die Sperrglieder relativ zueinander und in bezug auf den Sperrbolzen so verschwenkt, daß die beiden Sperrnasen 14, 15 den Sperrbolzen freistellen, wobei die beiden Sperrschlitze 8, 9 zueinander eine derartige Zuordnung erfahren, daß für den Sperrbolzen eine Langlochführung vorliegt, deren Flanken einerseits von der Flanke 8′ des Sperrschlitzes 8 und andererseits von der Flanke 13′ des Sperrschlitzes 9 gebildet werden. Dieses von beiden Sperrschlitzen definierte Langloch hat dabei die Gesamtlänge L, wie in den Fig. 2, 4 angegeben. In dieser Stellung kann mit einem Stuhl gemäß Fig. 1 mit Sitz 1 und Rückenlehne 2 gewissermaßen gewippt werden, und zwar in einem Neigungsbereich, der durch die Länge L des Langlochschlitzes vorgegeben ist. Lehne und Sitz folgen dabei den Körperbewegungen durch eine entsprechende Abfederung der Verstellmechanik, die hier keiner näheren Erläuterung bedarf. Bei Entlastung des Zugstranges 4 durch Loslassen des nicht dargestellten Stellhebels verkürzt sich dabei die Länge des Wippweges um den Querschnitt des Sperrbolzens 6.As can be seen in particular from FIGS. 2, 4 and 6, the locking device can be pivoted from two relative to one another about the
Ohne die Grundkonstruktion der beiden Stellglieder verlassen zu müssen, kann die Sperrvorrichtung ohne weiteres dahingehend weiter ausgebildet werden, daß außer der Sperrung in Normalstellung weitere Sperrstellungen eingenommen werden können. Wie gestrichelt in den Fig. 2, 4 angedeutet, ist dafür in der Flanke 13 des Schlitzes 9 mindestens eine weitere Ausnehmung 22 und dieser gegenüberstehend am Schlitz 8 des anderen Sperrgliedes 10 an der gegenüberstehenden Schlitzflanke 12 ein Sperrbolzenblockierfortsatz 23 angeordnet. Bei voll oder teilweise geneigter Rückenlehne 2 hat man also lediglich den Stellhebel am Stuhl für das Stellglied 4 loszulassen, wodurch die Druckfeder wieder ihre Wirkung bei entlasteter Rückenlehne ausüben kann und der Sperrbolzen 6 in die Ausnehmung 22 einrastet, aus der der Sperrbolzen 6 nicht mehr herauskann, da dem der Sperrbolzenblockierfortsatz 23 entgegensteht. Bei dieser Ausführungsform sind also, wie gestrichelt durch die Ausnehmung 22 bzw. Nasen 23 insgesamt fünf Sperrstellungen möglich, wobei zwischen den Ausnehmungen 22 immer noch genügend "Fleisch" vorhanden ist. Um die beiden Sperrbolzen direkt, d.h., ohne seitliches Aufschieben an der Achse 3 plazieren zu können, sind die die Achse 3 aufnehmenden Lageraugen 24 der beiden Sperrglieder 10, 11 mit lösbaren Lagerabdeckungen 25 verschlossen.Without having to leave the basic construction of the two actuators, the locking device can be further developed in such a way that in addition to the locking in the normal position, further locking positions can be assumed. As indicated by dashed lines in FIGS. 2, 4, there is in the
Die in Fig. 9 dargestellten und in ihrer äußeren Form etwas abweichend gestalteten Sperrglieder 10, 11 sind in diesem Falle mit einer unterhalb der Sperrschlitze angeordneten Druckfeder 5 ausgestattet. Außerdem und wie aus Fig. 9A ersichtlich, sind hierbei die Sperrglieder gleich breit bemessen, weisen aber seitliche und gegeneinander gerichtete Fortsätze auf, zwischen denen die Druckfeder angeordnet ist.The
Claims (5)
- A blocking device for chairs, in particular, office chairs on which the seat and/or the back, relative to the chair frame, are cushioned in inclination-adjustable manner and in at least one position are lockable on the frame, comprising two blocking members (10,11) disposed on an axis and swivable by means of a set member (4) on the element to be adjusted and to be locked, with a blocking bolt (6) on the chair frame extending through the blocking slots thereof provided with a blocking bolt recess and corresponding in length to the maximum inclination adjustment,
characterized in that the two blocking members (10,11) are swibably disposed relative to one another about the common axis (3) forming part of the seat (1) and/or the back (2) and being movable with the seat and/or the back and, in a manner directed one against the other by means of a spring (5) acting on both blocking members, are in abutment with the blocking bolt (6) in a manner enclosing the latter, with the blocking slots (8,9), on opposite slot flanks (12,13) comprising at least one blocking lug (14,15) protruding into the respective slot (8,9), one of which (15) is radially disposed, relative to the common axis (3), higher than the other (14) such that both lugs (14,15) lock the blocking bolt (6) in the blocking position. - A device according to claim 1,
characterized in that the spring (5) and the set member (4) are disposed below the blocking slots (8,9) between the two blocking members (10,11). - A device according to claim 1,
characterized in that the one blocking member (11), at best, is twice as wide as the other blocking member and is provided with a recess (16) forming a groove (17) with the other blocking member (10) in which is disposed a swivel lever (19) two-armed on the wider blocking member (11), with the lower lever arm (19) of said swivel lever (18), with a follower pin (20), engaging a slot guide (21) of the narrower blocking member (10), and with the other lever arm (19′) being engaged by a set member (4) attached to the blocking member (11) of geater width, and with the spring (5) being disposed, in loaded condition, between the latter and the blocking member (11) of greater width. - A device according to any one of claims 1 to 3,
characterized in that disposed in the flank of the slot (9) including the blocking nose (15), above the latter, is at least one additional recess (22) and opposite the latter, on slot (8) of the other blocking member (10), is disposed a blocking bolt locking extension (23) on the opposite slot flank (12). - A device according to any one of claims 1 to 4,
characterized in that the bearing eyes (24) of the two blocking members (10,11) accommodating the axis (3) are sealed by detachable bearing sealants (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT90112383T ATE83626T1 (en) | 1989-07-01 | 1990-06-29 | LOCKING DEVICE FOR CHAIRS, ESPECIALLY OFFICE CHAIRS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3921757A DE3921757A1 (en) | 1989-07-01 | 1989-07-01 | CHAIR, ESPECIALLY OFFICE CHAIR |
| DE3921757 | 1989-07-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0406706A1 EP0406706A1 (en) | 1991-01-09 |
| EP0406706B1 true EP0406706B1 (en) | 1992-12-23 |
Family
ID=6384149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90112383A Expired - Lifetime EP0406706B1 (en) | 1989-07-01 | 1990-06-29 | Locking device for chairs, especially office chairs |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0406706B1 (en) |
| AT (1) | ATE83626T1 (en) |
| DE (2) | DE3921757A1 (en) |
| ES (1) | ES2037510T3 (en) |
| GR (1) | GR3006657T3 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9204874U1 (en) * | 1992-04-08 | 1992-06-17 | Sifa Sitzfabrik Gmbh, 8458 Sulzbach-Rosenberg, De | |
| DE9211244U1 (en) * | 1992-08-21 | 1992-10-29 | Dauphin Friedrich W Gmbh |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3627252A (en) * | 1969-12-22 | 1971-12-14 | Yoshiomi Yamaguchi | Tilting chair |
| DE3727784A1 (en) * | 1987-08-20 | 1989-03-02 | Kloeber Gmbh & Co | WORK CHAIR WITH SWIVELING SEAT SHELL |
-
1989
- 1989-07-01 DE DE3921757A patent/DE3921757A1/en not_active Ceased
-
1990
- 1990-06-29 DE DE9090112383T patent/DE59000645D1/en not_active Expired - Fee Related
- 1990-06-29 AT AT90112383T patent/ATE83626T1/en not_active IP Right Cessation
- 1990-06-29 EP EP90112383A patent/EP0406706B1/en not_active Expired - Lifetime
- 1990-06-29 ES ES199090112383T patent/ES2037510T3/en not_active Expired - Lifetime
-
1992
- 1992-12-24 GR GR920402750T patent/GR3006657T3/el unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE59000645D1 (en) | 1993-02-04 |
| ES2037510T3 (en) | 1993-06-16 |
| DE3921757A1 (en) | 1991-01-10 |
| EP0406706A1 (en) | 1991-01-09 |
| ATE83626T1 (en) | 1993-01-15 |
| GR3006657T3 (en) | 1993-06-30 |
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