EP0553440A1 - Guiding bush for a length adjustable column for chairs, tables or the like - Google Patents

Guiding bush for a length adjustable column for chairs, tables or the like Download PDF

Info

Publication number
EP0553440A1
EP0553440A1 EP92120693A EP92120693A EP0553440A1 EP 0553440 A1 EP0553440 A1 EP 0553440A1 EP 92120693 A EP92120693 A EP 92120693A EP 92120693 A EP92120693 A EP 92120693A EP 0553440 A1 EP0553440 A1 EP 0553440A1
Authority
EP
European Patent Office
Prior art keywords
guide
bushing according
webs
guide bushing
cylinder surfaces
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
EP92120693A
Other languages
German (de)
French (fr)
Other versions
EP0553440B1 (en
Inventor
Hans Jürgen Bauer
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.)
Suspa Compart AG
Original Assignee
Suspa Compart AG
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 Suspa Compart AG filed Critical Suspa Compart AG
Publication of EP0553440A1 publication Critical patent/EP0553440A1/en
Application granted granted Critical
Publication of EP0553440B1 publication Critical patent/EP0553440B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats

Definitions

  • the invention relates to a guide bush according to the preamble of claim 1.
  • the invention has for its object to provide a guide bush of the generic type that is easy to manufacture and gives the housing of the length adjustment element an exact, firm, lateral guidance.
  • the measures according to the invention ensure that the machining, for example broaching, of the part-cylinder surfaces serving as guide surfaces ensures very precise guidance of the housing of the length adjustment element.
  • the part-cylinder surfaces can be formed very precisely on the guide webs projecting radially from the inner surface of the guide bush in a very simple manner, without the resulting chips coming off during machining being able to lead to crushing and thus to surface damage.
  • the guide webs are very stiff together with the guide sleeve, so that no unintentional radial movements of the housing of the length adjustment element are possible.
  • a guide bushing 1 is arranged in a guide tube 2, only indicated, of a height-adjustable chair column.
  • chair columns are known, for example, from EP 0 325 726 A1 (corresponding to US Pat. No. 4,899,969), to which express reference is made.
  • the guide bushing 1 has a sliding bushing 3, on the outside of which rib webs 5 projecting outward radially to the central longitudinal axis 4 are formed. With these rib webs 5, the guide bush 1 is supported radially against the inner wall 6 of the guide tube 2. An upper collar 7 defines the guide bush 1 in the axial direction with respect to the guide tube 2. In addition, the guide bush 1 is pushed into the guide tube 2 with a press fit.
  • a housing 9 of an only indicated gas spring 10 is guided so as to be displaceable in the direction of the axis 4.
  • This gas spring 10 together with the guide tube 2 and the guide bushing 1 essentially form the mentioned height-adjustable chair column.
  • the housing 9 of the gas spring 10 can be its direct housing, or an additional support tube surrounding the gas spring 10, as is also known from EP 0 325 726 A1 (corresponding to US Pat. No. 4,899,969), to which express reference is also made becomes.
  • the guide bushing 1 is made of plastic, preferably a polyacetal, and is produced in one piece by injection molding.
  • Guide webs 11 are formed on the inner surface 8 of the sliding bush 3 and extend over the full axial length of the sliding bush 3 and project radially from the inner surface 8 to the axis 3. They are formed in one piece with the sliding bush 3.
  • the guide webs 11 Before a calibration process to be explained by broaching, the guide webs 11 have an oversize towards the axis 3. This is reduced by the broaching process, so that 11 partial cylinder surfaces 12 are then formed on the guide webs, which form the actual guide surfaces relative to the housing 9 of the gas spring 10.
  • Recesses 13 run between adjacent guide webs 11 as parts of the inner surface 8.
  • a broach which has broaching teeth with a circular cutting edge extending over its entire circumference.
  • the cleared chips have a width that corresponds at most to the width b of the partial cylinder surfaces 12.
  • the chips cleared from adjacent partial cylinder surfaces 12 are interrupted in the area of the recess 13 lying between them. This type of broaching of the partial cylinder surfaces 12 leads to the fact that they are cleared very smoothly with a high surface quality, because the plastic chips produced during broaching can run off well. There is no danger that they will get stuck between the cutting teeth of the broaching tool and the inner surface 8 of the sliding bush 3 and damage the surface of the part-cylinder surfaces 12.
  • the sum of the partial cylinder surfaces 12 forms the actual guide surface of the sliding bush 3 with respect to the housing 9 of the gas spring 10.
  • the strength is further increased by the fact that the guide webs 11 are each arranged in radial overlap with the rib webs 5, so that executives exerted radially to the axis 3 by the housing 9 via the guide webs 11 on the slide sleeve 3 each directly into the Guide ribs 11 associated ribs 5 can be initiated.
  • the guide webs 11 run in a straight line and parallel to the axis 4, they can also be tortuous, that is to say run helically with a large slope.
  • the slope is expediently at least so great that two adjacent guide webs overlap one another at least once over the length of the guide webs 11. In this way it is achieved that the housing 9 is supported radially at least over its entire circumference by the partial cylinder surfaces.
  • the slope can also be greater, so that multiple overlap of adjacent guide webs is achieved over their length.
  • a gas spring 10 as a pneumatic or hydropneumatic length adjustment element
  • a purely mechanical length adjustment element for example with a mechanical spring, can also be provided, which has a cylindrical housing or a cylindrical guide part for guidance on the part-cylinder surfaces 12 having.
  • the guide bush 1 in the described configuration can also be used as a pure rotary guide, that is to say without the possibility of an axial displacement.

Landscapes

  • Bearings For Parts Moving Linearly (AREA)
  • Chairs Characterized By Structure (AREA)
  • Tables And Desks Characterized By Structural Shape (AREA)
  • Fluid-Damping Devices (AREA)
  • Vibration Dampers (AREA)
  • Legs For Furniture In General (AREA)

Abstract

A guiding bush for a longitudinally adjustable column for chairs has an outer side which is constructed for receiving and supporting in a guiding tube (2) of the column. Furthermore, the guiding bush has an inner surface (8) on which guiding webs (11) are formed which project in the direction of a longitudinal mid-axis (4). The guiding webs (11) are separated from one another by recesses (13). Partial cylindrical surfaces (12), which are produced by machining and are concentric to the axis (4), are formed on the guiding webs (11) as guiding surfaces for a housing of a longitudinally adjustable gas spring. <IMAGE>

Description

Die Erfindung betrifft eine Führungsbüchse nach dem Oberbegriff des Anspruches 1.The invention relates to a guide bush according to the preamble of claim 1.

Derartige, beispielsweise aus der DE 19 31 012 C (entspr. US-PS 3 711 054) oder der EP o 133 524 B (entspr. US-PS 4 979 718) ausgebildete Säulen weisen ein äußeres Führungsrohr aus Metall auf, in dessen oberem, einer Bodenplatte abgewandten Bereich eine Führungsbüchse aus Kunststoff angeordnet ist, die sich nur über einen Teil der Länge des Führungsrohres erstreckt.Columns of this type, formed for example from DE 19 31 012 C (corresponding to US Pat. No. 3,711,054) or EP 0 133 524 B (corresponding to US Pat. No. 4,979,718), have an outer guide tube made of metal, in the upper part of which , a base plate facing away from a plastic guide sleeve is arranged, which extends only over part of the length of the guide tube.

In der nicht vorveröffentlichten DE 40 24 392 A (entspr. US-Ser. No. 07/732 537) ist bereits vorgeschlagen worden, derartige Führungsbüchsen an ihrer Innenfläche durch Räumen derart zu formen, daß über den Umfang verteilt Teil-Zylinder-Flächen als Führungsflächen und zwischen diesen Rücksprünge vorgesehen sind, in denen Schmierfett angeordnet werden kann.In the unpublished DE 40 24 392 A (corresponds to US Ser. No. 07/732 537) it has already been proposed to form such guide bushes on their inner surface by broaching in such a way that part-cylinder surfaces distributed over the circumference Guide surfaces and between these recesses are provided, in which grease can be arranged.

Der Erfindung liegt die Aufgabe zugrunde, eine Führungsbüchse der gattungsgemäßen Art zu schaffen, die einfach herstellbar ist und dem Gehäuse des Längenverstellelementes eine exakte, feste, seitliche Führung gibt.The invention has for its object to provide a guide bush of the generic type that is easy to manufacture and gives the housing of the length adjustment element an exact, firm, lateral guidance.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale im Kennzeichnungsteil des Anspruches 1 gelöst. Durch die erfindungsgemäßen Maßnahmen ist sichergestellt, daß durch die spanabhebende Bearbeitung, beispielsweise Räumen, der als Führungsflächen dienenden Teil-Zylinder-Flächen eine sehr exakte Führung des Gehäuses des Längenverstellelementes gewährleistet wird. Die Teil-Zylinder-Flächen können an den radial von der Innenfläche der Führungsbüchse vorspringenden Führungsstegen in sehr einfacher Weise sehr exakt ausgeformt werden, ohne daß die bei der Bearbeitung anfallenden ablaufenden Späne zu Verquetschungen und damit zu Oberflächenbeschädigungen führen können. Die Führungsstege sind zusammen mit der Führungsbüchse sehr steif, so daß keine unbeabsichtigten radialen Bewegungen des Gehäuses des Längenverstellelementes möglich sind.This object is achieved by the features in the characterizing part of claim 1. The measures according to the invention ensure that the machining, for example broaching, of the part-cylinder surfaces serving as guide surfaces ensures very precise guidance of the housing of the length adjustment element. The part-cylinder surfaces can be formed very precisely on the guide webs projecting radially from the inner surface of the guide bush in a very simple manner, without the resulting chips coming off during machining being able to lead to crushing and thus to surface damage. The guide webs are very stiff together with the guide sleeve, so that no unintentional radial movements of the housing of the length adjustment element are possible.

Zahlreiche vorteilhafte, teilweise erfinderische Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen.Numerous advantageous, partially inventive details of the invention emerge from the subclaims.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles anhand der Zeichnung. Es zeigt

Fig. 1
einen Teilausschnitt aus einer höhenverstellbaren Stuhlsäule mit Führungsrohr, Führungsbüchse und Gehäuse einer Gasfeder,
Fig. 2
die Führungsbüchse im Längsschnitt,
Fig. 3
eine Draufsicht auf Fig. 2 gemäß dem Sichtpfeil III in Fig. 2 und
Fig. 4
einen Querschnitt durch die Führungsbüchse nach einer spanabhebenden Bearbeitung entsprechend der Schnittlinie IV-IV in Fig. 2.
Further advantages, features and details of the invention result from the following description of an exemplary embodiment with reference to the drawing. It shows
Fig. 1
a partial section of a height-adjustable chair column with guide tube, guide bush and housing of a gas spring,
Fig. 2
the guide bush in longitudinal section,
Fig. 3
a plan view of Fig. 2 according to the arrow III in Fig. 2 and
Fig. 4
3 shows a cross section through the guide bush after machining according to the section line IV-IV in FIG. 2.

Eine Führungsbüchse 1 ist in einem nur angedeuteten Führungsrohr 2 einer höhenverstellbaren Stuhlsäule angeordnet. Derartige Stuhlsäulen sind beispielsweise aus der EP 0 325 726 A1 (entspr. US-Patent 4 899 969) bekannt, worauf ausdrücklich verwiesen wird.A guide bushing 1 is arranged in a guide tube 2, only indicated, of a height-adjustable chair column. Such chair columns are known, for example, from EP 0 325 726 A1 (corresponding to US Pat. No. 4,899,969), to which express reference is made.

Die Führungsbüchse 1 weist eine Gleitbüchse 3 auf, an deren Außenseite radial zur Mittel-Längs-Achse 4 nach außen vorspingende Rippen-Stege 5 angeformt sind. Mit diesen Rippen-Stegen 5 stützt sich die Führungsbüchse 1 radial gegen die Innenwand 6 des Führungsrohres 2 ab. Ein oberer Ringbund 7 legt die Führungsbüchse 1 in axialer Richtung gegenüber dem Führungsrohr 2 fest. Im übrigen ist die Führungsbüchse 1 mit Preßsitz in das Führungsrohr 2 eingeschoben.The guide bushing 1 has a sliding bushing 3, on the outside of which rib webs 5 projecting outward radially to the central longitudinal axis 4 are formed. With these rib webs 5, the guide bush 1 is supported radially against the inner wall 6 of the guide tube 2. An upper collar 7 defines the guide bush 1 in the axial direction with respect to the guide tube 2. In addition, the guide bush 1 is pushed into the guide tube 2 with a press fit.

An der Innenfläche 8 der Gleitbüchse 3 ist ein Gehäuse 9 einer nur angedeuteten Gasfeder 10 in Richtung der Achse 4 verschiebbar geführt. Diese Gasfeder 10 bildet zusammen mit dem Führungsrohr 2 und der Führungsbüchse 1 im wesentlichen die angesprochene höhenverstellbare Stuhlsäule. Das Gehäuse 9 der Gasfeder 10 kann deren unmittelbares Gehäuse sein, oder ein zusätzliches, die Gasfeder 10 umgebendes Tragrohr, wie es ebenfalls aus der EP 0 325 726 A1 (entspr. der US-PS 4 899 969) bekannt ist, worauf ebenfalls ausdrücklich verwiesen wird.On the inner surface 8 of the sliding bush 3, a housing 9 of an only indicated gas spring 10 is guided so as to be displaceable in the direction of the axis 4. This gas spring 10 together with the guide tube 2 and the guide bushing 1 essentially form the mentioned height-adjustable chair column. The housing 9 of the gas spring 10 can be its direct housing, or an additional support tube surrounding the gas spring 10, as is also known from EP 0 325 726 A1 (corresponding to US Pat. No. 4,899,969), to which express reference is also made becomes.

Die Führungsbüchse 1 besteht aus Kunststoff, und zwar bevorzugt aus einem Polyacetal, und ist einstückig durch Spritzgießen hergestellt. An der Innenfläche 8 der Gleitbüchse 3 sind Führungsstege 11 ausgebildet, die über die volle axiale Länge der Gleitbüchse 3 verlaufen und radial von der Innenfläche 8 zur Achse 3 hin vorstehen. Sie sind einstückig mit der Gleitbüchse 3 ausgebildet. Die Führungsstege 11 weisen vor einem noch zu erläuternden Kalibriervorgang durch Räumen ein Übermaß zur Achse 3 hin auf. Dieses wird durch den Räumvorgang reduziert, so daß dann an den Führungsstegen 11 Teil-Zylinder-Flächen 12 ausgebildet werden, die die eigentlichen Führungsflächen gegenüber dem Gehäuse 9 der Gasfeder 10 bilden. Zwischen benachbarten Führungsstegen 11 verlaufen als Teile der Innenfläche 8 Rücksprünge 13. Für den Radius R12 der Teil-Zylinder-Flächen 12 von der Achse 4 und den radialen Abstand R13 der Rücksprünge 13 von der Achse 3 bezogen auf den Radius R9 des Gehäuses 9 gilt die Beziehung R13 > R12 ≧ R9, wobei R12 höchstens um wenige hundertstel Millimeter, beispielsweise bis zu 0,05 mm, größer ist als R9.The guide bushing 1 is made of plastic, preferably a polyacetal, and is produced in one piece by injection molding. Guide webs 11 are formed on the inner surface 8 of the sliding bush 3 and extend over the full axial length of the sliding bush 3 and project radially from the inner surface 8 to the axis 3. They are formed in one piece with the sliding bush 3. Before a calibration process to be explained by broaching, the guide webs 11 have an oversize towards the axis 3. This is reduced by the broaching process, so that 11 partial cylinder surfaces 12 are then formed on the guide webs, which form the actual guide surfaces relative to the housing 9 of the gas spring 10. Recesses 13 run between adjacent guide webs 11 as parts of the inner surface 8. The radius R12 of the partial cylinder surfaces 12 from the axis 4 and the radial distance R13 of the recesses 13 from the axis 3 with respect to the radius R9 of the housing 9 apply Relationship R13> R12 ≧ R9, where R12 is at most a few hundredths of a millimeter, for example up to 0.05 mm, larger than R9.

Wie den Fig. 3 und 4 entnehmbar ist, sind zwölf Führungsstege 11 in gleichen Winkelabständen und parallel zur Achse 3 verlaufend vorgesehen. Auf jeden Fall sollten es mindestens sechs Führungsstege 11 sein. Die Breite a der Rücksprünge 13 in Umfangsrichtung ist etwa doppelt so groß wie die Breite b der Teil-Zylinder-Flächen 12. In den Rücksprüngen 13 kann Schmierfett 14 untergebracht werden.3 and 4 can be seen, twelve guide webs 11 are provided at equal angular intervals and running parallel to the axis 3. In any case, there should be at least six guide bars 11. The width a of the recesses 13 in the circumferential direction is approximately twice as large as the width b of the partial cylinder surfaces 12. Grease 14 can be accommodated in the recesses 13.

Zum Räumen der Teil-Zylinder-Flächen 12 wird eine Räumnadel eingesetzt, die über ihren ganzen Umfang sich erstreckende Räumzähne mit kreisförmiger Schneide aufweist. Bei dem Räumprozeß werden von den Führungsstegen 11 das erwähnte Übermaß ausmachende Teile spanabhebend entfernt. Die geräumten Späne haben hierbei eine Breite, die maximal der Breite b der Teil-Zylinder-Flächen 12 entspricht. Die aus benachbarten Teil-Zylinder-Flächen 12 geräumten Späne sind im Bereich des zwischen ihnen liegenden Rücksprungs 13 unterbrochen. Diese Art des Räumens der Teil-Zylinder-Flächen 12 führt dazu, daß diese sehr glatt mit hoher Oberflächenqualität geräumt werden, weil die beim Räumen anfallenden Kunststoffspäne gut ablaufen können. Es besteht keine Gefahr, daß sie sich zwischen den Schneidzähnen des Räumwerkzeuges und der Innenfläche 8 der Gleitbüchse 3 festsetzen und die Oberfläche der Teil-Zylinder-Flächen 12 beschädigen.To broach the partial cylinder surfaces 12, a broach is used which has broaching teeth with a circular cutting edge extending over its entire circumference. In the broaching process, the aforementioned excess parts are removed by machining from the guide webs 11. The cleared chips have a width that corresponds at most to the width b of the partial cylinder surfaces 12. The chips cleared from adjacent partial cylinder surfaces 12 are interrupted in the area of the recess 13 lying between them. This type of broaching of the partial cylinder surfaces 12 leads to the fact that they are cleared very smoothly with a high surface quality, because the plastic chips produced during broaching can run off well. There is no danger that they will get stuck between the cutting teeth of the broaching tool and the inner surface 8 of the sliding bush 3 and damage the surface of the part-cylinder surfaces 12.

Die Summe der Teil-Zylinder-Flächen 12 bildet die eigentliche Führungsfläche der Gleitbüchse 3 gegenüber dem Gehäuse 9 der Gasfeder 10. Die Führungsbüchse 1 ist in sich außerordentlich fest. Eine gute Führung des Gehäuses 9 der Gasfeder 10 wird auch dadurch unterstützt, daß die radiale Höhe c der Führungsstege 11 gegenüber der Breite b klein ist. Es gilt also c > b, wobei gilt R13 - R12 = c. Die Festigkeit wird noch weiter dadurch erhöht, daß die Führungsstege 11 jeweils in radialer Überdeckung mit den Rippen-Stegen 5 angeordnet sind, so daß vom Gehäuse 9 über die Führungsstege 11 auf die Gleitbüchse 3 ausgeübte radial zur Achse 3 verlaufende Führungskräfte direkt jeweils in die den Führungsstegen 11 zugeordneten Rippen-Stege 5 eingeleitet werden.The sum of the partial cylinder surfaces 12 forms the actual guide surface of the sliding bush 3 with respect to the housing 9 of the gas spring 10. The guide bush 1 is extremely solid in itself. Good guidance of the housing 9 of the gas spring 10 is also supported in that the radial height c of the guide webs 11 is small compared to the width b. So c> b, where R13 - R12 = c. The strength is further increased by the fact that the guide webs 11 are each arranged in radial overlap with the rib webs 5, so that executives exerted radially to the axis 3 by the housing 9 via the guide webs 11 on the slide sleeve 3 each directly into the Guide ribs 11 associated ribs 5 can be initiated.

Anstelle des geschilderten Räumens können grundsätzlich auch alle anderen geeigneten spanabhebenden Bearbeitungsverfahren eingesetzt werden, beispielweise also Stoßen, das dem Druckräumen sehr ähnlich ist.Instead of the broaching described, basically all other suitable machining processes can also be used, for example, butting, which is very similar to pressure broaching.

Während im dargestellten und beschriebenen Ausführungsbeispiel die Führungsstege 11 geradlinig und parallel zur Achse 4 verlaufen, können sie auch gewunden, also etwa schraubenlinienförmig mit großer Steigung verlaufen. Zweckmäßigerweise ist die Steigung zumindest so groß, daß über die Länge der Führungsstege 11 zwei einander benachbarte Führungsstege einander zumindest einmal überlappen. Auf diese Weise wird erreicht, daß das Gehäuse 9 zumindest über seinen gesamten Umfang durch die Teil-Zylinder-Flächen radial abgestützt wird. Selbstverständlich kann die Steigung auch größer sein, so daß eine mehrfache Überdeckung benachbarter Führungsstege über deren Länge erreicht wird.While in the illustrated and described exemplary embodiment the guide webs 11 run in a straight line and parallel to the axis 4, they can also be tortuous, that is to say run helically with a large slope. The slope is expediently at least so great that two adjacent guide webs overlap one another at least once over the length of the guide webs 11. In this way it is achieved that the housing 9 is supported radially at least over its entire circumference by the partial cylinder surfaces. Of course, the slope can also be greater, so that multiple overlap of adjacent guide webs is achieved over their length.

Es sei ausdrücklich darauf hingewiesen, daß anstelle einer Gasfeder 10 als pneumatischem oder hydropneumatischem Längenverstellelement auch ein rein mechanisches Längenverstellelement, beispielsweise mit einer mechanischen Feder vorgesehen sein kann, das ein zylindrisches Gehäuse bzw. ein zylindrisches Führungsteil zur Führung an den Teil-Zylinder-Flächen 12 aufweist. Grundsätzlich kann die Führungsbüchse 1 in der geschilderten Ausgestaltung auch als reine Drehführung, also ohne die Möglichkeit einer axialen Verschiebung eingesetzt werden.It is expressly pointed out that instead of a gas spring 10 as a pneumatic or hydropneumatic length adjustment element, a purely mechanical length adjustment element, for example with a mechanical spring, can also be provided, which has a cylindrical housing or a cylindrical guide part for guidance on the part-cylinder surfaces 12 having. In principle, the guide bush 1 in the described configuration can also be used as a pure rotary guide, that is to say without the possibility of an axial displacement.

Claims (14)

Führungsbüchse für eine längenverstellbare Säule für Stühle, Tische od.dgl., deren Außenseite zur Aufnahme und Abstützung in einem Führungsrohr (2) der Säule ausgebildet ist und die an ihrer Innenfläche (8) mit einer zu einer Mittel-Längs-Achse (4) konzentrischen Führungsfläche zur Führung eines zylindrischen Gehäuses (9) eines Verstellelementes (Gasfeder 10) versehen ist und die einstückig aus Kunststoff ausgebildet ist, dadurch gekennzeichnet, daß an der Innenfläche (8) zur Mittel-Längs-Achse (4) hin vorspringende, durch Rücksprünge (13) voneinander getrennte Führungsstege (11) ausgebildet sind und daß an den Führungsstegen (11) durch Spanabheben hergestellte, zur Achse (4) konzentrische Teil-Zylinder-Flächen (12) als Führungsflächen für das Gehäuse (9) ausgebildet sind.Guide bush for a length-adjustable column for chairs, tables or the like, the outside of which is designed for receiving and supporting in a guide tube (2) of the column and which on its inner surface (8) has a central-longitudinal axis (4) concentric guide surface for guiding a cylindrical housing (9) of an adjusting element (gas spring 10) and which is formed in one piece from plastic, characterized in that on the inner surface (8) projecting towards the central longitudinal axis (4) by recesses (13) separate guide webs (11) are formed and that on the guide webs (11) produced by cutting, concentric to the axis (4) partial cylinder surfaces (12) are designed as guide surfaces for the housing (9). Führungsbüchse nach Anspruch 1, dadurch gekennzeichnet, daß die Breite (a) der Rücksprünge (13) in Umfangsrichtung größer ist als die Breite (b) der Teil-Zylinder-Flächen (12) in Umfangsrichtung.Guide bushing according to claim 1, characterized in that the width (a) of the recesses (13) in the circumferential direction is greater than the width (b) of the partial cylinder surfaces (12) in the circumferential direction. Führungsbüchse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß in mindestens einem Rücksprung (13) Schmierfett (14) angeordnet ist.Guide bushing according to claim 1 or 2, characterized in that grease (14) is arranged in at least one recess (13). Führungsbüchse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Teil-Zylinder-Flächen (12) durch Räumen hergestellt sind.Guide bushing according to one of claims 1 to 3, characterized in that the partial cylinder surfaces (12) are produced by broaching. Führungsbüchse nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die radiale Höhe (c) der Führungsstege (11) kleiner ist als deren Breite (b).Guide bushing according to one of Claims 1 to 4, characterized in that the radial height (c) of the guide webs (11) is smaller than their width (b). Führungsbüchse nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß - jeweils bezogen auf die Achse (4) - für den Radius (R12) der Teil-Zylinder-Flächen (12) und den radialen Abstand (R13) der Rücksprünge (13) im Verhältnis zum Radius (R9) des Gehäuses (9) die Beziehung gilt R13 > R12 ≧ R9.Guide bushing according to one of claims 1 to 5, characterized in that - in each case with respect to the axis (4) - for the radius (R12) of the part-cylinder surfaces (12) and the radial distance (R13) of the recesses (13) in relation to the radius (R9) of the housing (9) the relationship applies R13> R12 ≧ R9. Führungsbüchse nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Teil-Zylinder-Flächen (12) in gleichen Winkelabständen zueinander angeordnet sind.Guide bushing according to one of claims 1 to 6, characterized in that the partial cylinder surfaces (12) are arranged at equal angular distances from one another. Führungsbüchse nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Führungsstege (11) mit den Teil-Zylinder-Flächen (12) sich im wesentlichen über die volle Länge der Führungsbüchse (1) erstrecken.Guide bushing according to one of Claims 1 to 7, characterized in that the guide webs (11) with the partial cylinder surfaces (12) extend substantially over the full length of the guide bushing (1). Führungsbüchse nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß sie mit radial zur Achse (4) nach außen vorspringenden Rippen-Stegen (5) versehen ist.Guide bushing according to one of claims 1 to 7, characterized in that it is provided with rib webs (5) projecting radially outward to the axis (4). Führungsbüchse nach Anspruch 9, dadurch gekennzeichnet, daß die Führungsstege (11) radial zur Achse (4) jeweils fluchtend zu den Rippen-Stegen (5) angeordnet sind.Guide bushing according to claim 9, characterized in that the guide webs (11) are arranged radially to the axis (4) in each case in alignment with the rib webs (5). Führungsbüchse nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß mindestens sechs Führungsstege (11) vorgesehen sind.Guide bushing according to one of Claims 1 to 10, characterized in that at least six guide webs (11) are provided. Führungsbüchse nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Führungsstege (11) mit den Teil-Zylinder-Flächen (12) geradlinig und parallel zur Mittel-Längs-Achse (4) verlaufend angeordnet sind.Guide bushing according to one of Claims 1 to 11, characterized in that the guide webs (11) with the partial cylinder surfaces (12) are arranged in a straight line and parallel to the central longitudinal axis (4). Führungsbüchse nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Führungsstege mit den Teil-Zylinder-Flächen schraubenlinienförmig ausgebildet sind.Guide bushing according to one of Claims 1 to 11, characterized in that the guide webs with the part-cylinder surfaces are of helical design. Führungsbüchse nach Anspruch 13, dadurch gekennzeichnet, daß zwei benachbarte Teil-Zylinder-Flächen in Richtung der Mittel-Längs-Achse (4) einander überdecken.Guide bushing according to claim 13, characterized in that two adjacent partial cylinder surfaces overlap one another in the direction of the central longitudinal axis (4).
EP92120693A 1992-01-25 1992-12-04 Guiding bush for a length adjustable column for chairs, tables or the like Expired - Lifetime EP0553440B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9200884U DE9200884U1 (en) 1992-01-25 1992-01-25 Guide bushing for a length-adjustable column for chairs, tables or similar.
DE9200884U 1992-01-25

Publications (2)

Publication Number Publication Date
EP0553440A1 true EP0553440A1 (en) 1993-08-04
EP0553440B1 EP0553440B1 (en) 1994-06-15

Family

ID=6875389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92120693A Expired - Lifetime EP0553440B1 (en) 1992-01-25 1992-12-04 Guiding bush for a length adjustable column for chairs, tables or the like

Country Status (8)

Country Link
US (2) US5413414A (en)
EP (1) EP0553440B1 (en)
JP (1) JP2604962Y2 (en)
KR (1) KR0127791Y1 (en)
DE (2) DE9200884U1 (en)
ES (1) ES2056683T3 (en)
MX (1) MX9300376A (en)
TR (1) TR26401A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0668037A1 (en) * 1994-02-18 1995-08-23 SUSPA COMPART Aktiengesellschaft Guiding sleeve and telescopic column with guiding sleeve
EP0802346A2 (en) * 1996-04-11 1997-10-22 Gain Gas Technique, S.L. Gas cylinder
DE19636202A1 (en) * 1996-09-06 1998-03-12 Stabilus Gmbh Bush for telescopic gas spring
KR100436415B1 (en) * 2001-07-24 2004-06-16 주식회사 삼홍사 Column unit and tube guide for the column unit
WO2008135215A1 (en) * 2007-05-05 2008-11-13 Preh Gmbh Control element for a motor vehicle
US10487901B2 (en) 2017-01-09 2019-11-26 Beijingwest Industries Co., Ltd. Damping strut

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4242475A1 (en) * 1992-12-16 1994-06-23 Suspa Compart Ag Guide bushing, in particular for length-adjustable chair column and chair column with such a guide bushing
JP3550213B2 (en) * 1994-07-14 2004-08-04 株式会社大宇エレクトロニクス Vacuum cleaner wheel
US5556170A (en) * 1995-08-22 1996-09-17 Lai; Yu-Shan Sleeve structure of an office chair
US5702083A (en) * 1996-04-17 1997-12-30 Lai; Shiang-Hwey Pneumatic cylinder of a pneumatic lever-lift chair, and its assembly process
US5915659A (en) * 1996-07-08 1999-06-29 Scannell, Jr.; Gerard Adjustable keyboard podium
US5797685A (en) * 1996-11-22 1998-08-25 Chrysler Corporation Gear shift tube support
KR200157184Y1 (en) * 1996-11-25 1999-09-15 황영재 Guide sleeve for a length-adjustable column for chairs
DE19710095B4 (en) * 1997-03-12 2011-02-03 Ise Automotive Gmbh Multifunction guide ring for radial force absorption and play-free and friction-free axial guidance of cylindrical components
DE29705568U1 (en) * 1997-03-27 1998-07-23 T.R.-PLAST Kunststoff-Verarbeitung, 92318 Neumarkt Guide bushing for spring tube that can be used in a standpipe, especially for office chairs
US6371421B1 (en) * 1997-08-23 2002-04-16 Samhongsa Co., Ltd. Device for controlling the height of a swivel chair
TW392808U (en) 1997-10-16 2000-06-01 Suspa Compart Ag Guide bush and length adjustable column with a guide bush
EP0958763A1 (en) * 1998-05-15 1999-11-24 Cabex AG Support
DE10039808A1 (en) * 2000-08-16 2002-02-28 Volkswagen Ag Plastic journal bearing bushing for support of a motor vehicle pedal on its axle, has a hollow construction allowing easy compressibility and so reducing machining tolerances in the associated parts
KR20020081844A (en) * 2001-04-20 2002-10-30 주식회사 삼홍사 Column unit
DE10227201C1 (en) * 2002-06-18 2003-09-04 Stabilus Gmbh Furniture item support column has pressure equalisation openings for movement of carrier tube arranged to prevent collection of water in guide tube
US6769788B1 (en) * 2003-01-27 2004-08-03 Jeffrey Keith Kellough Flashlight sleeve
US20050254887A1 (en) * 2004-05-14 2005-11-17 Shurhold Industries, Inc. Releasable locking mechanism
US8127639B2 (en) * 2005-08-16 2012-03-06 Steering Solutions IP Holding Company, a Delaware corporation Sleeve bearing for collapsible steering column
DE102005059188B4 (en) 2005-12-12 2007-10-25 Heinemack Gmbh restaurant system
US8561422B2 (en) * 2006-08-10 2013-10-22 Wayne Jackman Portable canned drink cooler and dispenser
US8312819B2 (en) * 2007-12-10 2012-11-20 Weber Aircraft Llc Expansion and retraction mechanisms for moveable tray tables
DE102009042197A1 (en) * 2009-09-18 2010-12-16 Aktiebolaget Skf Sliding element for telescopic guide that is utilized for adjusting height of writing table, has recess for holding lubricant, where guide element of telescopic guide is moved on sliding surface of element
TW201215785A (en) * 2010-10-15 2012-04-16 Risun Expanse Corp Bearing and structure of bearing assembly and rotation device
DE102013102674B4 (en) 2013-03-15 2015-02-05 Heinemack Gmbh restaurant system
DE102013102687B4 (en) * 2013-03-15 2015-03-19 Heinemack Gmbh restaurant system
US9499083B2 (en) 2013-04-01 2016-11-22 Zodiac Seats Us Llc Tray table structure
DE102013108065B4 (en) * 2013-07-29 2015-04-09 Benteler Automobiltechnik Gmbh elastomeric bearings
CN106051020A (en) * 2016-07-29 2016-10-26 常州市莱特气弹簧有限公司 Rear propping sleeve of pneumatic rod

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790119A (en) * 1971-08-31 1974-02-05 F Bauer Energy storing device, particularly a blockable pneumatic spring
GB2189557A (en) * 1986-04-22 1987-10-28 Eurocastors Limited Improvements in bearings for wheels
EP0325726A1 (en) * 1988-01-28 1989-08-02 SUSPA COMPART Aktiengesellschaft Blockable lifting device for the stepless adjustment of furniture parts, and guiding bush for such a lifting device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1377866A (en) * 1920-05-29 1921-05-10 White Joseph Walwyn Lubrication of machinery
US2348274A (en) * 1943-07-28 1944-05-09 Evender S Aker Shaft journaling means
US2539782A (en) * 1948-07-29 1951-01-30 John F A Kell Bearing sleeve
CH514317A (en) * 1969-06-19 1971-10-31 Bauer Fritz Lifting device for stepless adjustment of a wing, in particular the seat of chairs or stools
US3923280A (en) * 1975-03-21 1975-12-02 Harter Corp Adjustable support column for a pivotal chair
JPS53139045A (en) * 1977-05-10 1978-12-05 Mitsubishi Motors Corp Bearing device
DE8422413U1 (en) * 1983-07-29 1985-11-21 Fritz Bauer + Söhne oHG, 8503 Altdorf Length-adjustable gas spring for a lockable lifting device for stepless adjustment of chair seats, table tops or similar pieces of furniture
DE3833959A1 (en) * 1988-10-06 1990-04-12 Bauer Fritz & Soehne Ohg LENGTH ADJUSTABLE COLUMN FOR CHAIRS, TABLES OR THE LIKE
DE4003245C2 (en) * 1990-02-03 1997-08-21 Stabilus Gmbh Guide for telescopic cylindrical parts
DE4024392A1 (en) * 1990-08-01 1992-02-06 Suspa Compart Ag METHOD FOR PRODUCING A SLIDING SURFACE ON A PLASTIC GUIDE BUSH FOR A HEIGHT-ADJUSTABLE CHAIR COLUMN
JPH0553554U (en) * 1991-12-27 1993-07-20 東海金属工業株式会社 bearing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790119A (en) * 1971-08-31 1974-02-05 F Bauer Energy storing device, particularly a blockable pneumatic spring
GB2189557A (en) * 1986-04-22 1987-10-28 Eurocastors Limited Improvements in bearings for wheels
EP0325726A1 (en) * 1988-01-28 1989-08-02 SUSPA COMPART Aktiengesellschaft Blockable lifting device for the stepless adjustment of furniture parts, and guiding bush for such a lifting device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0668037A1 (en) * 1994-02-18 1995-08-23 SUSPA COMPART Aktiengesellschaft Guiding sleeve and telescopic column with guiding sleeve
EP0802346A2 (en) * 1996-04-11 1997-10-22 Gain Gas Technique, S.L. Gas cylinder
EP0802346A3 (en) * 1996-04-11 1998-12-23 Gain Gas Technique, S.L. Gas cylinder
DE19636202A1 (en) * 1996-09-06 1998-03-12 Stabilus Gmbh Bush for telescopic gas spring
DE19636202C2 (en) * 1996-09-06 1999-12-30 Stabilus Gmbh Guide bushing for telescopic parts
KR100436415B1 (en) * 2001-07-24 2004-06-16 주식회사 삼홍사 Column unit and tube guide for the column unit
WO2008135215A1 (en) * 2007-05-05 2008-11-13 Preh Gmbh Control element for a motor vehicle
US10487901B2 (en) 2017-01-09 2019-11-26 Beijingwest Industries Co., Ltd. Damping strut

Also Published As

Publication number Publication date
ES2056683T3 (en) 1994-10-01
KR930017654U (en) 1993-08-20
US5496115A (en) 1996-03-05
JP2604962Y2 (en) 2000-06-12
KR0127791Y1 (en) 1998-11-02
EP0553440B1 (en) 1994-06-15
MX9300376A (en) 1994-02-28
JPH0744153U (en) 1995-11-07
DE59200245D1 (en) 1994-07-21
US5413414A (en) 1995-05-09
TR26401A (en) 1995-03-15
DE9200884U1 (en) 1992-04-09

Similar Documents

Publication Publication Date Title
EP0553440B1 (en) Guiding bush for a length adjustable column for chairs, tables or the like
EP0095020B1 (en) Securing of roller bearings
DE2114802C3 (en) Cardan joint
EP0378964A2 (en) Trepanning tool
DE2647289A1 (en) PEDAL HUB FOR BICYCLES
DE2011777C3 (en)
CH660702A5 (en) BORING TOOL WITH A TWO-CUTTER HEAD.
DE60020533T2 (en) Support structure of a fork pipe in a bicycle
EP0469325B1 (en) Method of manufacturing sliding faces on a plastic guide bushing for a height adjustable chair&#39;s column unit
DE3101315C3 (en) Wedge-operated jaw chuck for a machine tool
DE19715016A1 (en) Two-part housing and method for its manufacture
EP0551604B1 (en) Adjustable column for tables, chairs or the like
DE3621978A1 (en) CUTTING MACHINE FOR PILLAR-SHAPED MATERIAL
EP0978353A2 (en) Grinding machine with removable protective cover
DE3339951C2 (en) Drive shaft for the wheels of a motor vehicle, in particular a passenger car
DE19580446B4 (en) Device for producing profile workpieces, in particular gears
DE19909062C2 (en) Chuck
DD142079A5 (en) KARDANGELENK WITH STORAGE BOWLS
AT377467B (en) SAWING DEVICE
DE3820167C2 (en) Honing tool
DE2914157C2 (en) Honing tool
EP0668037B1 (en) Guiding sleeve and telescopic column with guiding sleeve
DE7725198U1 (en) SPACE TUBE
DE9007247U1 (en) Transport roller for machines for processing wood, plastic, etc.
DE8130136U1 (en) &#34;Double shift gears for change gears&#34;

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT SE

17P Request for examination filed

Effective date: 19931002

17Q First examination report despatched

Effective date: 19931202

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT SE

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

REF Corresponds to:

Ref document number: 59200245

Country of ref document: DE

Date of ref document: 19940721

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

Effective date: 19940701

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2056683

Country of ref document: ES

Kind code of ref document: T3

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

Ref country code: SE

Payment date: 19941223

Year of fee payment: 3

EAL Se: european patent in force in sweden

Ref document number: 92120693.4

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

Ref country code: SE

Effective date: 19951205

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: GB

Payment date: 20041122

Year of fee payment: 13

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: 20051204

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

Effective date: 20051204

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

Ref country code: IT

Payment date: 20061231

Year of fee payment: 15

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

Ref country code: ES

Payment date: 20071220

Year of fee payment: 16

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

Ref country code: DE

Payment date: 20080114

Year of fee payment: 16

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

Ref country code: FR

Payment date: 20071214

Year of fee payment: 16

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: 20071204

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20090831

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: 20090701

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20081205

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

Ref country code: ES

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

Effective date: 20081205

Ref country code: FR

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

Effective date: 20081231