EP4091503B1 - Befestigungseinrichtung für stuhl und stuhl mit befestigungseinrichtung - Google Patents

Befestigungseinrichtung für stuhl und stuhl mit befestigungseinrichtung Download PDF

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Publication number
EP4091503B1
EP4091503B1 EP22172635.9A EP22172635A EP4091503B1 EP 4091503 B1 EP4091503 B1 EP 4091503B1 EP 22172635 A EP22172635 A EP 22172635A EP 4091503 B1 EP4091503 B1 EP 4091503B1
Authority
EP
European Patent Office
Prior art keywords
screw
fastening
hole
fastening device
adapter
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.)
Active
Application number
EP22172635.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP4091503C0 (de
EP4091503A1 (de
Inventor
Matthias Stegner
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.)
ASS EINRICHTUNGSSYSTEME GmbH
Original Assignee
ASS EINRICHTUNGSSYSTEME GmbH
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 ASS EINRICHTUNGSSYSTEME GmbH filed Critical ASS EINRICHTUNGSSYSTEME GmbH
Publication of EP4091503A1 publication Critical patent/EP4091503A1/de
Application granted granted Critical
Publication of EP4091503B1 publication Critical patent/EP4091503B1/de
Publication of EP4091503C0 publication Critical patent/EP4091503C0/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/14—Seat parts of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/025—Springs not otherwise provided for in A47C7/22 - A47C7/35
    • A47C7/027—Springs not otherwise provided for in A47C7/22 - A47C7/35 with elastomeric springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/34—Seat parts with springs in compression, e.g. coiled
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C9/00—Stools for specified purposes
    • A47C9/002—Stools for specified purposes with exercising means or having special therapeutic or ergonomic effects

Definitions

  • the invention relates to a fastening device for fastening a seat shell to a chair frame and to a chair with a seat shell and a chair frame, wherein the chair frame is fastened to the seat shell by means of the fastening device according to the invention.
  • Seat shells for chairs that are attached to a chair frame are known from the state of the art.
  • DE1 114 012 A sled chair is known in which a seat shell is attached to the chair frame using fastening screws.
  • the fastening screws run from the top of the seat shell through the seat shell.
  • the screws that run through the seat shell are locked to the chair frame using screw nuts.
  • the disadvantage here is that the fastening screws are visible on the top of the seat shell. When sitting, these screws can have a negative effect on the comfort of the seat and it can happen that clothing is damaged by the screw heads. On the other hand, dirt can collect in the area of the screws or screw heads, which should be avoided for hygiene reasons.
  • An adapter is known with which a seat shell of a chair can be attached to a chair frame.
  • the adapter has a fastening adapter to the underside of which a compressible block is glued.
  • the fastening adapter itself is attached to the underside of the seat shell using screws.
  • a seat shell is known to which a support device is attached by means of an adhesive.
  • a tiltable seat plate is known on the underside of which elastic elements are arranged to enable dynamic tilting.
  • the elastic elements are arranged between the seat plate and a base plate.
  • the base plate itself is attached to the underside of the seat plate using screws.
  • a tiltable seat device is known.
  • a fastening plate is arranged on the underside of the seat body and is attached to the seat body by means of screws.
  • the object of the present invention is therefore to provide a solution with which, on the one hand, even thin or less strong seat shells can be attached to a chair frame without the fastening screws being visible on the top of the seat shell, and with which, on the other hand, a chair frame can be attached to the seat shell without any further processing of the seat shell.
  • the mounting adapter can be attached to the underside of the seat shell using the adhesive on the support surface, with the screw itself protruding from the underside of the mounting adapter and the chair frame being able to be attached to the mounting adapter using the screw. This makes it possible to attach a chair frame to a seat shell without having to drill holes in the seat shell or otherwise pre-treat it, or without having to pass screws through the seat shell.
  • the through hole is arranged in a bottom section of the recess and is dimensioned and designed in such a way that the screw can be arranged in the through hole with lateral play. This allows manufacturing tolerances or deviations to be compensated.
  • the through hole and the screw are dimensioned in such a way, and that the screw can be arranged in the through hole with lateral play, that the screw in the through hole can be tilted relative to a longitudinal axis of the through hole.
  • This allows inclinations of the seat shell relative to the chair frame or inclinations of the seat shell relative to a through hole on the chair frame through which the screw is passed to be compensated for without the fastening device having to be adjusted for this purpose.
  • the fastening device can therefore be used flexibly.
  • the screw is arranged in the through hole so as to be secured against rotation relative to the through hole, and, on the other hand, the screw in the through hole is inclinable relative to a longitudinal axis of the through hole.
  • the through hole has a four-sided cross-section.
  • the fastening adapter can be designed in the shape of a plate.
  • a base of the plate-shaped fastening adapter forms the base section of the fastening adapter.
  • the fastening device can also comprise a deformable washer that can be arranged between the fastening adapter and the chair frame and through which the screw can be passed. This allows even greater inclinations of the seat shell relative to the chair frame to be compensated. On the other hand, this can also achieve a certain amount of damping between the seat shell or fastening adapter and the chair frame, which increases seating comfort.
  • the fastening device can further comprise an optional connection adapter which can be arranged between the fastening adapter and the chair frame and through which the screw can be passed, wherein an end section of the connection adapter facing the chair frame is adapted to the external shape of the corresponding section of the chair frame.
  • the connecting adapter can also be arranged between the washer and the chair frame.
  • the recess of the fastening adapter for receiving the screw head is dimensioned in such a way that the screw head is completely accommodated in the recess. This means that the The screw head does not protrude from the recess when the screw has been passed through the through hole, preferably even when the screw is inclined relative to the longitudinal axis of the through hole.
  • the fastening device can further comprise a screw nut with which the fastening device can be locked to the chair frame.
  • a flexible or deformable washer can be arranged between the screw head and the base section.
  • the washer can consist of a flexible plastic, for example.
  • the washer can also be firmly connected to the base section.
  • the adhesive is adapted to attach the fastening device to the seat shell, wherein the adhesive can preferably comprise an adhesive based on silane-modified polymers (MS polymer adhesive).
  • the invention further provides a chair with a seat shell and a chair frame, wherein the chair frame is fastened to an underside of the seat shell by means of a fastening device according to the invention, wherein the fastening device is arranged between the seat shell and the chair frame.
  • Fig.1 shows a section of a seat shell 10 of a chair, which is or will be fastened to a chair frame 15 by means of a fastening device 20 according to the invention. Only a section of the chair frame 15 is shown here, with this section of the chair frame 15 being designed as a round tube.
  • this type of fastening according to the invention is characterized in that even seat shells 10 that have a low strength or thickness can be securely and stably fastened to a chair frame 15 without fastening screws being visible on the top of the seat shell 10. Drill holes in the seat shell 10 for passing such fastening screws through are therefore not necessary. No drill holes for receiving fastening screws need to be provided on the underside of the seat shell either. The stability of the seat shell is therefore not impaired by drill holes.
  • the fastening device 20 comprises at least one screw 21, a fastening adapter 22 and a screw nut 26.
  • the mounting adapter 22 may have a plate-shaped form, as in Fig. 2
  • the fastening adapter 22 is not limited to this plate-shaped form. Rather, other basic shapes can also be provided, provided that a corresponding recess for receiving a screw head is provided on the top of the fastening adapter 22, as will be apparent from the following description.
  • the fastening adapter 22 has a recess or a depression 22b in which the screw head 21a of the screw 21 can be accommodated as completely as possible, so that the screw head 21a does not protrude from the top of the fastening adapter 22.
  • a through hole 22a is provided on the bottom or bottom section 22c of the recess 22b, through which the screw 21 is passed from top to bottom. After the screw 21 has been passed through the through hole 22a, the screw head 21a rests on the bottom section 22c of the recess or depression 22b.
  • the through hole 22a is dimensioned such that the screw 21 in the through hole has a lateral play, ie that the screw 21 in the through hole can be tilted to the side.
  • This lateral inclination of the screw 21 relative to the fastening adapter 22 can compensate for tolerance inaccuracies when fastening the seat shell 10 to the chair frame 15.
  • This lateral inclination can also compensate for curvatures on the underside of the seat shell 10. This means that the inclination of the fastening adapter can be adapted to the seat shell without the fastening adapter itself having to be adapted, ie structurally changed.
  • the fastening adapter 22 has a support surface 22d running around the recess or depression 22b, which faces the underside 11 of the seat shell 10 when the fastening adapter is fastened to the underside 11 of the seat shell 10.
  • an adhesive 25 is applied to the support surface 22d.
  • MS polymer adhesive an adhesive based on silane-modified polymers
  • a PU hot melt adhesive can be used.
  • the screw 21 is mounted with lateral play in the fastening adapter 22 or in the through hole 22a of the fastening adapter.
  • the through hole 22a and a lower section of the screw head 21a or a section of the shaft 21b of the screw 21 facing the screw head 21a are designed here in such a way that the screw has lateral play in the through hole 22a, but the screw 21 itself is simultaneously secured against twisting relative to the fastening adapter 22.
  • the shaft 21b of the screw 21 protrudes from the underside of the fastening adapter 22.
  • This protruding section of the shaft 21b of the screw 21 is then pushed through a correspondingly dimensioned drill hole in the chair frame 15 and screwed from below with a screw nut 26.
  • the seat shell is thus connected to the chair frame 15 without having to provide drill holes in the seat shell for passing screws through.
  • the entire attachment of the seat shell to the chair frame is carried out without drilling or milling, as the fastening device 20 is glued to the underside 11 of the seat shell 10.
  • a flexible or deformable washer 23 can optionally be arranged between the fastening adapter 22 and the chair frame 15, which also has a through hole for the screw 21 to pass through.
  • the washer 23 is preferably deformable so that it can deform when the fastening device 20 is fastened to the chair frame 15 and can thus adapt to the shape of the chair frame 15 and/or to the shape of the underside of the fastening adapter.
  • the washer 23 is preferably made of a plastic.
  • a connecting adapter 24 can be provided between the fastening adapter 22 and the chair frame 15, the lower section of which is adapted to the shape of the chair frame 15.
  • This connecting adapter also has a through hole for the screw 21 to pass through.
  • both the flexible washer 23 and the connection adapter 24 can be provided, so that the flexible washer 23 is pressed between the fastening adapter 22 and the connection adapter 24 when the fastening device 20 is screwed, as in Fig.5 shown.
  • a cover 30 can be provided with which the screw nut 26 can be covered.
  • the cover 30 serves on the one hand to visually conceal the screw nut 26.
  • the cover serves as a stack protector, i.e. as a cover that prevents scratching or damage to the seat of the chair underneath when stacking chairs according to the invention. It is advantageous here if the cover 30 is made of a soft but nevertheless stable plastic.
  • Fig.2 shows an embodiment of a fastening adapter 22 of a fastening device 20 according to the invention.
  • the fastening adapter 22 is here designed in a plate-shaped manner and has a circumferential, upper support surface 22d on which the adhesive 25 is applied.
  • the fastening adapter has a round base here.
  • the base can also have any other shape, as long as it has at least a section-wide support surface 22d for applying the adhesive 25.
  • a through hole 22a is provided on the bottom section 22c of the recess 22b, through which the screw can be passed until the screw rests with its screw head 21a on the bottom section 22c.
  • the through hole 22a is dimensioned such that the screw passed through the through hole can be inclined against the fastening adapter 22.
  • the through hole 22a is also designed such that the screw passed through the through hole 22a is secured against twisting relative to the fastening adapter 22.
  • a substantially cylindrical wall is provided between the circumferential support surface 22d and the through hole 22a, so that one or more recesses are formed between the support surface 22d and this wall, into which adhesive can also be introduced.
  • the mounting adapter 22 can be made of a sturdy plastic.
  • Fig. 3 and Fig. 4 show the Fig.1 shown fastening device in a side view and in a front view, each in an exploded view.
  • the screw nut 26 is designed here as a sleeve nut, which can be inserted into the underside of the tubular chair frame 15, as in Fig.5 shown.
  • Fig.5 shows the arrangement of a fastening device 20 according to the invention on the underside 11 of a seat shell 10 and on a tubular chair frame 15.
  • the flexible washer 23 and the connecting adapter 24 are arranged between the fastening adapter 22 and the tube section of the chair frame 15, with the underside or lower section of the connecting adapter 24 being adapted to the shape of the chair frame.
  • the screw nut 26 is tightened, the flexible washer 23 is pressed between the fastening adapter 22 and the connecting adapter 24.
  • Fig.6 shows the arrangement of a fastening device 20 according to the invention on the underside 11 of a seat shell 10 and on a receiving plate 17 which is fastened to a chair frame 15.
  • the connecting adapter 24 can be dispensed with here.
  • the flexible or deformable washer 23 which is arranged between the fastening adapter 22 and the mounting plate 17, the gap between the fastening adapter 22 and the mounting plate 17, which has a certain angle, can be compensated.
  • the mounting plate After screwing the screw nut onto the screw 21, the mounting plate is firmly connected to the fastening adapter 22, so that the chair frame 15 is fastened to the underside 11 of the seat shell 10 via the fastening device 20.
  • a connecting adapter 24 is provided.
  • the inclination of the seat shell relative to the chair frame can be adjusted or set using a connecting adapter.
  • the connecting adapters can be designed in a wedge or trapezoid shape.
  • connection adapter 24 shown can, if appropriately designed, be provided to adjust or adapt the inclination of the seat shell relative to the chair frame.
  • the through hole 22a and the screw 21 are designed such that the screw is mounted in the through hole with play and can advantageously be inclined relative to the longitudinal axis of the through hole.
  • Fig.7 shows two examples ( Figures (a) and (b)) of a screw 22 arranged in a through hole 22a of a fastening adapter 22 of a fastening device according to the invention.
  • Figure (a) shows a plate-shaped fastening adapter 22 in which the screw 21 is arranged essentially coaxially to the longitudinal axis LA of the through hole 22a, i.e. the longitudinal axis LA of the through hole 22a is largely identical to the longitudinal axis LAS of the screw 21.
  • the screw 21 is arranged here with lateral play in the through hole 22a. Within this lateral play, the screw 21 can be moved laterally so that the longitudinal axis LA of the through hole 22a and the longitudinal axis LAS of the screw 21 are no longer coaxial but parallel to one another. This makes it easy to compensate for tolerance inaccuracies.
  • the screw head 21a of the screw 21 is arranged completely in the recess 22b of the fastening adapter 22, ie the screw head does not protrude from the recess. This prevents the underside of the seat shell from damaging the seat shell when the fastening device is attached to the seat shell. On the other hand, this ensures in particular that the fastening adapter 22 can be glued to the seat shell. without a protruding screw head hindering the bonding process or even leading to a less stable bond.
  • Figure (b) shows the same fastening adapter 22 and the same screw 21 as figure (a).
  • the screw 21 is arranged with lateral play in the through hole 22a.
  • the screw 21 is inclined laterally, i.e. the longitudinal axis LAS of the screw 21 is at a certain angle to the longitudinal axis LA of the through hole 22a.
  • the screw head 21a of the screw 21 is arranged completely in the recess 22b of the fastening adapter 22, i.e. the screw head does not protrude from the recess.
  • a washer 27 (indicated here with a dashed line) can (optionally) be arranged between the screw head 21a of the screw 21 and the base section 22c of the recess 22b.
  • This washer 27 can be made of a flexible material, such as rubber, so that when the screw is tightened with the screw nut (not shown here), it is pressed or squeezed between the screw head 21a and the base section 22c. The different distances between the screw head and the base section are thus compensated by the deformable washer 27 or the space between the screw head and the base section is filled by the flexible or deformable washer 27.
  • the use of a flexible or deformable washer 27 is particularly advantageous when it is necessary for the screw to be arranged in the through hole relative to the longitudinal axis of the through hole.
  • the solution according to the invention means that drilling or other milling in the seat shell is not necessary in order to accommodate fastening screws for attaching the seat shell to a chair frame.
  • the surface of the seat shell and in particular the top of the seat shell remain intact. This makes it possible to attach the chair frame to a seat shell even with thin or less strong seat shells.
  • tolerance inaccuracies can be compensated so that after gluing the fastening device to the underside of the seat shell, screwing to the chair frame is guaranteed at all times.

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)
EP22172635.9A 2021-05-17 2022-05-10 Befestigungseinrichtung für stuhl und stuhl mit befestigungseinrichtung Active EP4091503B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021112731.9A DE102021112731B4 (de) 2021-05-17 2021-05-17 Befestigungseinrichtung für Stuhl und Stuhl mit Befestigungseinrichtung

Publications (3)

Publication Number Publication Date
EP4091503A1 EP4091503A1 (de) 2022-11-23
EP4091503B1 true EP4091503B1 (de) 2024-04-17
EP4091503C0 EP4091503C0 (de) 2024-04-17

Family

ID=81603743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22172635.9A Active EP4091503B1 (de) 2021-05-17 2022-05-10 Befestigungseinrichtung für stuhl und stuhl mit befestigungseinrichtung

Country Status (4)

Country Link
EP (1) EP4091503B1 (pl)
DE (1) DE102021112731B4 (pl)
ES (1) ES2982900T3 (pl)
PL (1) PL4091503T3 (pl)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649136A (en) 1947-03-01 1953-08-18 Herman Miller Furniture Compan Furniture shock mount construction
DE1114012B (de) 1956-10-17 1961-09-21 Ver Schulmoebelfabriken G M B Stahlrohr-Kufenstuhl als Schulstuhl
US4871208A (en) * 1988-09-06 1989-10-03 Dewey Hodgdon Chair tilt control mechanism
DE4114458C1 (en) 1991-05-03 1992-11-12 Fritz Becker Kg, 3492 Brakel, De Thin plate fastener with head member - which has plate abutting, flat, deposition surface and elongated arrester with dovetail shape
KR20050020170A (ko) 2003-08-21 2005-03-04 (주) 에이치티 하이팩 의자의 좌판 제조방법과 하이팩 의자의 좌판
DE202009007017U1 (de) * 2009-05-15 2009-08-20 Nefe, Ralf Einstellbare, dynamische Sitzkonstruktion
US8540519B1 (en) * 2010-10-21 2013-09-24 James Lauter Seated balancing device
WO2019073419A1 (en) * 2017-10-11 2019-04-18 Fleetwood Group, Inc. OSCILLATING SEAT STOOL

Also Published As

Publication number Publication date
EP4091503C0 (de) 2024-04-17
PL4091503T3 (pl) 2024-07-15
EP4091503A1 (de) 2022-11-23
DE102021112731B4 (de) 2023-04-20
DE102021112731A1 (de) 2022-11-17
ES2982900T3 (es) 2024-10-18

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