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EP0553440B1 - 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

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Publication number
EP0553440B1
EP0553440B1 EP92120693A EP92120693A EP0553440B1 EP 0553440 B1 EP0553440 B1 EP 0553440B1 EP 92120693 A EP92120693 A EP 92120693A EP 92120693 A EP92120693 A EP 92120693A EP 0553440 B1 EP0553440 B1 EP 0553440B1
Authority
EP
European Patent Office
Prior art keywords
guide
guide sleeve
sleeve according
webs
partial cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92120693A
Other languages
German (de)
French (fr)
Other versions
EP0553440A1 (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

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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
    • 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 bushing 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 bushing in a very simple manner, without the chips running off during processing being able to lead to crushing and thus to surface damage.
  • the guide webs are very stiff together with the guide bush, 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-A-0 325 726 (corresponding to US-A-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 annular collar 7 fixes 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 bush 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-A-0 325 726 (corresponding to US-A-4,899,969), whereupon is also expressly referred to.
  • the guide sleeve 1 is made of plastic, preferably a polyacetal, and is made in one piece by injection molding.
  • Guide webs 11 are formed on the inner surface 8 of the sliding bush 3, which extend over the full axial length of the sliding bush 3 and project radially from the inner surface 8 to the axis 4. 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 to the axis 4. 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 4 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.
  • 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 from the housing 9 via the guide webs 11 on the slide bush 3, executives extending radially to the axis 4 run directly into each of the Ribs 5 associated with guide webs 11 can be introduced.
  • 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 pitch.
  • the slope is expediently at least so large 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 bushing 1 in the embodiment described can also be used as a pure rotary guide, ie 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)
  • Legs For Furniture In General (AREA)
  • Vibration Dampers (AREA)

Description

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

Derartige, beispielsweise aus der DE-A- 19 31 012 (entspr. US-A- 3 711 054) oder der EP-A- 0 133 524 B (entspr. US -A- 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-A-19 31 012 (corresponding to US-A-3 711 054) or EP-A-0 133 524 B (corresponding to US-A-4 979 718), have an outer guide tube made of metal, in the upper, facing away from a base plate, a plastic guide bushing is arranged, which extends only over part of the length of the guide tube.

In der nicht vorveröffentlichten DE-A- 40 24 392 (entspr. US-A- 5 152 646) 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-A-40 24 392 (corresponds to US-A-5 152 646) 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 as 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 bushing in a very simple manner, without the chips running off during processing being able to lead to crushing and thus to surface damage. The guide webs are very stiff together with the guide bush, 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
2 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-A- 0 325 726 (entspr. US-A- 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-A-0 325 726 (corresponding to US-A-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 annular collar 7 fixes 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-A- 0 325 726 (entspr. der US-A- 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 bush 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-A-0 325 726 (corresponding to US-A-4,899,969), whereupon is also expressly referred to.

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 4 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 4 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 4 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 sleeve 1 is made of plastic, preferably a polyacetal, and is made in one piece by injection molding. Guide webs 11 are formed on the inner surface 8 of the sliding bush 3, which extend over the full axial length of the sliding bush 3 and project radially from the inner surface 8 to the axis 4. 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 to the axis 4. 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 4 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 4 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 parallel to the axis 4. 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 4 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 rigid 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 from the housing 9 via the guide webs 11 on the slide bush 3, executives extending radially to the axis 4 run directly into each of the Ribs 5 associated with guide webs 11 can be introduced.

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 pitch. The slope is expediently at least so large 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 bushing 1 in the embodiment described can also be used as a pure rotary guide, ie without the possibility of an axial displacement.

Claims (14)

  1. Guide sleeve for a length-adjustable column for chairs, tables or the like, of which the outside is formed to be received and supported in a guide tube (2) of the column and which is provided on its internal surface (8) with a guide surface concentric of a central longitudinal axis (4) to guide a cylindrical housing (9) of an adjusting element (gas spring 10) and which is made in one piece of plastic material, characterized in that guide webs (11) are formed on the internal surface (8) which project towards the central longitudinal axis (4) and which are separated from each other by recesses (13) and in that, produced on the guide webs (11) by chip removal, partial cylinder surfaces (12) concentric of the axis (4) are formed as guide surfaces for the housing (9).
  2. Guide sleeve according to claim 1, characterized in that the width (a) of the recesses (13) in the circumferential direction exceeds the width (b) of the partial cylinder surfaces (12) in the circumferential direction.
  3. Guide sleeve according to one of the claims 1 or 2, characterized in that a lubricant (14) is arranged in at least one recess (13).
  4. Guide sleeve according to one of the claims 1 to 3, characterized in that the partial cylinder surfaces (12) are produced by broaching.
  5. Guide sleeve according to one of the claims 1 to 4, characterized in that the radial height (c) of the guide webs (11) is smaller than the latter's width (b).
  6. Guide sleeve according to one of the claims 1 to 5, characterized in that - in each case referred to the axis (4) - the relation R13 > R12 ≧ R9 applies to the radius (R12) of the partial cylinder surfaces (12) and the radial distance (R13) of the recesses (13) in relation to the radius (R9) of the housing (9).
  7. Guide sleeve according to one of the claims 1 to 6, characterized in that the partial cylinder surfaces (12) are arranged at equal angular distances in relation to each other.
  8. Guide sleeve according to one of the 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 sleeve (1).
  9. Guide sleeve according to one of the claims 1 to 7, characterized in that it is provided with rib webs (5) projecting outwards radially to the axis (4).
  10. Guide sleeve according to claim 9, characterized in that the guide webs (11) are arranged radially to the axis (4) each in alignment with the rib webs (5).
  11. Guide sleeve according to one of the claims 1 to 10, characterized in that at least six guide webs (11) are provided.
  12. Guide sleeve according to one of the claims 1 to 11, characterized in that the guide webs (11) with the partial cylinder surfaces (12) are arranged straight and extending in parallel to the central longitudinal axis (4).
  13. Guide sleeve according to one of the claims 1 to 11, characterized in that the guide webs with the partial cylinder surfaces are helically shaped.
  14. Guide sleeve according to claim 13, characterized in that two adjacent partial cylinder surfaces overlap each other 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 EP0553440A1 (en) 1993-08-04
EP0553440B1 true 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)

Families Citing this family (35)

* 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
DE9402656U1 (en) * 1994-02-18 1994-04-14 Suspa Compart Ag, 90518 Altdorf Guide sleeve and adjustable column with guide sleeve
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
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EP0553440A1 (en) 1993-08-04
TR26401A (en) 1995-03-15
KR930017654U (en) 1993-08-20
JPH0744153U (en) 1995-11-07
ES2056683T3 (en) 1994-10-01
KR0127791Y1 (en) 1998-11-02
JP2604962Y2 (en) 2000-06-12
US5496115A (en) 1996-03-05
DE59200245D1 (en) 1994-07-21
US5413414A (en) 1995-05-09
DE9200884U1 (en) 1992-04-09
MX9300376A (en) 1994-02-28

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