• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a chair, in particular office chair, with a seat element, a backrest and a support frame on which the seat element and the backrest are arranged. The backrest and / or the seat element are formed by a backrest frame or a seat frame and a surface element (11) spanned on the backrest frame and / or the seat frame. On the surface element (11) a plurality of fastening elements (17) for attachment to the back frame and / or the seat frame are formed.
    公开号:CH710131A1
    申请号:CH01415/14
    申请日:2014-09-19
    公开日:2016-03-31
    发明作者:Dietmar Fissi
    申请人:Sitag Ag；
    IPC主号:
    专利说明:

    Field of the invention
    The invention relates to a chair according to the preamble of claim 1.
    State of the art
    The backrest and the seat of chairs are often provided with a textile covering. The fabric may be formed as a coating which is pulled over a clamping frame of the backrest. In another embodiment, the clamping frame is made in two parts and the fabric is clamped between the two frame parts. The covering gives the chair user a pleasant resilient backrest function and adapts to the back of the user, but also has some disadvantages. On the one hand, the installation of the clothing in the clamping frame is relatively expensive, since a circumferential retaining element or a piping, for example a plastic profile, must be fastened to the fabric edge, so that the clothing is reliably held between the frame parts. On the other hand, the fabric quickly soils and is difficult to clean because it is not removable in the other embodiment.
    Such a backrest covering shows, for example, DE 10 2009 036 958 A1. The fabric is attached to the backrest frame also on cross members to give the backrest cover a shape that is adapted to the back of a user.
    Object of the invention
    Object of the present invention is to provide a chair with a fabric, which fabric is quickly connected to the tenter of the chair and also easy to clean.
    description
    A chair, in particular an office chair comprises a seat element, a backrest and a support frame, on which the seat element and the backrest are arranged. In the subject invention is a chair in which the backrest and / or the seat element are formed by a back frame or a seat frame and a spanned on the back frame and / or the seat frame surface element. These features are well known in the art.
    According to the invention the object is achieved in that on the surface element a plurality of fasteners for attachment to the back frame and / or the seat frame are formed. The production of the backrest or of the seat element is simplified significantly, since the surface element core Keder more attached, in particular sewn, must be to hold the surface element to the back frame. During production, the time-consuming step of fastening the cedar can be completely dispensed with. Since the surface element is produced by injection molding, its production is particularly fast, since the injection molding process has high cycle rates. It is also not necessary to cut textile surface webs because the surface element leaves the mold with high imaging accuracy.
    Conveniently, the surface element is integrally formed with the plurality of fasteners. An attachment of fasteners in a time-consuming further production step is therefore not necessary.
    In a particularly preferred embodiment, the fastening elements are formed as hooks, which are mounted in the fief frame and / or in the seat frame. The hooks can be cut out of the surface element, but can also be poured together with the remaining surface element. The hooks are formed as a part of the surface element and therefore can not be detached from the surface element.
    It proves to be advantageous if a plurality of through holes are provided on the back frame and / or the seat frame, in which engage the fasteners of the surface element. An attachment of the sheet material to the back frame can therefore be done very quickly by hooking. Backrest frame and surface element are both preferably produced by injection molding and work together accurately without having to be reworked after removal from the mold. Furthermore, the attaching step of hooking is easy and quick to do.
    Characterized in that the surface element is biased with advantage to the back frame and / or on the seat frame, there is a reliable connection between back frame and surface element. The fasteners are under tension and can not slip out of the back frame. It would be possible to additionally secure the fasteners, for example by screws.
    Suitably, the bias causes a width extension between 3% and 10% and preferably between 5% and 8% of the surface element. This expansion under prestressing is made possible by the elastic thermoplastic polyurethane. In addition, the expansion can be influenced by the shape and size of the passages of the surface element. An expansion in the claimed area causes sufficient bias in a still existing resilient effect of the backrest. The fact that the surface element has not yet reached its yield point under the bias, it can be hung without too much force in the backrest frame. Preferably, the surface element is stretched on the back frame only in the horizontal direction, ie along the width dimension. It is also conceivable, of course, a bias in the vertical direction.
    In a particularly preferred embodiment, the dimensions of the width of the stress-free surface element between 3% and 10% and preferably between 5% and 8% smaller than the width dimension of the back frame, whereby the surface element is biased in the horizontal direction on the back frame. The vote of the dimension of the back frame and the dimension of the surface element lead to a defined bias of the surface element.
    The advantageous material of the surface element, which is a thermoplastic polyurethane (TPU), is characterized by its good processability in the injection molding process, its high imaging accuracy, its high stability and its extensibility. Furthermore, TPU is easy to clean and disinfect. The chair according to the invention is therefore very well suited for applications in which high hygienic standards are required. These include, for example, the medical sector and the food-producing sector.
    In a particularly preferred embodiment, the surface element with the plurality of fasteners is a one-piece injection molded part. As already explained further, at least one production step can be saved with a single part, which comprises surface element and holder.
    It proves to be advantageous if the surface element has the shape of a network with network passages and network webs. The net shape allows a flexible, stretchable surface element, which is nevertheless stable. By determining the strength and length of the mesh webs, the extent of elasticity can be influenced.
    Conveniently, the carrying capacity of different areas of the clamped surface element by the strength and the length of the network webs and the measure of the bias is adjustable. The selective control of the degrees of hardness makes it possible for the backrest, for example, in the shoulder area, to have a different hardness than in the lordosis area.
    In a further preferred embodiment, the passages of the network are polygonal and preferably hexagonal. This results in a honeycomb structure, since the 6 polygons divide webs. At the edges of the surface element, the polygons may also have a different number of corners in order to provide the surface element as full as possible with passages.
    In a further preferred embodiment, the fastening elements are made of solid. The fastening elements are formed by the fact that a circumferential web, which is formed on the outer edge of the surface element, is reworked. The fasteners are therefore made of a cast with the surface element and accordingly stable.
    Advantageously, the passages at the edge of the surface element have the shape of uniform polygons and have the center of the surface element, at predefined locations, a shape in which at least one diagonal is shorter than the remaining diagonals. The ridges of the polygons, which have a shorter diagonal, are easier to expand. Thus, the extensibility of the surface element can be increased or reduced at predefined points by the shape of the polygons or their webs.
    Conveniently, the shorter diagonals of the passages are oriented in the clamping direction of the surface element. This orientation of the diagonals allows the surface element to expand more easily in one direction, thereby facilitating clamping onto the back frame.
    In a further preferred embodiment, the hooks facing the back frame or the seat frame and close with the surface element an angle between 20 degrees and 80 degrees, preferably between 30 degrees and 70 degrees and more preferably between 40 degrees and 60 degrees. The provision of an acute angle allows the hook to grip the back frame like a claw.
    In a further preferred embodiment, the back frame or the seat frame is in one piece. This embodiment has the advantage that it is simple in construction, since the surface element only has to be connected to the backrest frame, or has to be hooked into it. So that the fastening elements do not unintentionally detach from the backrest frame, securing elements can be provided. Conceivable, for example, projections, which have a kind of barbs and prevent the fasteners from loosening.
    In a further preferred embodiment, the back frame or the seat frame comprises a clamping frame for clamping the surface element and a holding frame, with which the clamping frame is connected. This embodiment has the advantage that the fastening elements are prevented from being released from the holding frame by the clamping frame. The combination of support frame and clamping frame increase the stability of the Lehenrahmens or the seat frame. Holding frame and clamping frame can be connected with positive locking, for example, screw or clamp connections.
    It is preferred if the TPU has a tensile strength between 10 and 25 MPa (megapascals), preferably between 15 and 20 MPa and more preferably between 17 and 19 MPa. This tensile strength ensures that the panel can support the weight of a user of the chair and does not break. However, such a tensile strength allows a certain extensibility, so that the surface element can be clamped in the backrest frame.
    Further advantages and features will become apparent from the following description of an embodiment of the invention with reference to the schematic representations. It shows in not to scale representation:<Tb> FIG. 1 <SEP> a surface element for covering a backrest of a chair in a front view;<Tb> FIG. 2 <SEP> the surface element in a side view;<Tb> FIG. 3 <SEP> the surface element in an axonometric view;<Tb> FIG. 4 <SEP> a clamping frame in front view;<Tb> FIG. 5 <SEP> the clamping frame in a side view;<Tb> FIG. 6 <SEP> the tenter in an axonometric view;<Tb> FIG. 7 <SEP> a holding frame in front view;<Tb> FIG. 8 <SEP> the holding frame in a side view and<Tb> FIG. 9 <SEP> the holding frame in an axonometric view.
    The invention relates to a chair, in particular an office chair, which in a conventional manner comprises a seat member and a backrest, which are arranged on a support frame. The support frame can be equipped with a roller frame.
    The backrest is formed by a backrest frame and a surface element 11 spanned on the backrest frame. The back frame is executed in two parts according to the embodiment of FIGS. It comprises a clamping frame 13 and a holding frame 15 which is connected to the clamping frame 13. The surface element 11 is clamped on the clamping frame 13 by being hooked to this. Then, the clamping frame 13 is screwed to the holding frame 15, so that the surface element 13 from the clamping frame 13 can not unhook.
    The surface element 11 is injection molded from a thermoplastic polyurethane, preferably a thermoplastic polyester-polyurethane. This material is characterized by its good processability by injection molding, its high imaging accuracy, its high stability and its ductility. The thermoplastic polyester-polyurethane has a tensile strength of 18 MPa (megapascals). In injection molding fasteners are mitausgeformt in the form of a running in the direction of the clamping frame 13 at an acute angle leg in one piece. The leg can be formed around the edge of the surface element 11. The surface element 11 is thus made with the leg of a cast. From the leg a plurality of hooks 17 are formed by these are formed from the solid. That From the leg gaps 19 are cut at uniform intervals, whereby the remaining leg parts transform into hooks 17. It is also conceivable to mold the hooks already during injection molding. However, this means a complex mold, since for each hook 17 a negative impression must be provided in the injection mold.
    The surface element 11 has the shape of a network with a plurality of polygonal openings 21 and net passages and the openings separating network webs 25. The openings 21 vary in their shape, depending on which location of the surface element they are provided. If the surface element 11 has an improved extensibility at one point, openings 21 with an enlarged surface are provided at this point, which may additionally have diagonals of different lengths. If the openings 21 are positioned with their shortened diagonal in the clamping direction, the extensibility of the surface element in the clamping direction is improved. The shape of the openings 21 makes it possible to improve or reduce the extensibility of the surface element at predefined locations. The strength and length of the mesh webs 25 also contributes to the extensibility and load-bearing capacity of the planar element 11.
    The surface element 11 is clamped to the clamping frame 13. The hooks 17 are pulled over the edge 23 of the clamping frame 13 and hooked on this. It is also possible that a plurality of through openings are provided on the clamping frame 13, in which the hooks 17 of the surface element 11 engage. The surface element 11 is biased by the latching of the hook 17 on the clamping frame. Preferably, the relaxed surface element on the clamping frame 13 is biased or expanded by 5 to 8% in the longitudinal and transverse directions. Since the thermoplastic polyester-polyurethane is elastic, results in the backrest a slightly resilient effect similar to a trampoline.
    The hooks 17 close with the plane of the surface element 11 an acute angle, which is preferably about 60 degrees. Due to the acute angle, the surface element 11 is reliably hooked to the clamping frame. Thus, the hooks 17 can not bend and the backrest has improved stability, the clamping frame 13 is received in the support frame 15. The outer edge of the clamping frame 13 and the inner edge of the holding frame are formed such that they fit flush with each other. This interaction of the two frames 13, 15 prevents the hooks 17 from bending and releasing from the clamping frame 13, since the hooks 17 abut on the holding frame 15. The frames are screwed together or hooked together by means of clips. It is also conceivable that the backrest frame is in one piece.
    Legend
    [0032]<Tb> 11 <September> surface element<Tb> 13 <September> stretcher<Tb> 15 <September> holding frame<Tb> 17 <September> Hook<Tb> 19 <September> interspaces<tb> 21 <SEP> Polygonal openings, grommets<tb> 23 <SEP> Edge of the tenter frame<Tb> 25 <September> Network webs
    权利要求:
    Claims (16)
    [1]
    1st chair, especially office chair, withA site element,- a backrest and- A support frame on which the seat element and the backrest are arranged, whereinthe backrest and / or the seat element are formed by a back frame or a seat frame and a surface element (11) clamped on the back frame and / or the seat frame, characterized in that a multiplicity of fastening elements (17) are attached to the surface element (11) Attachment to the back frame and / or the seat frame are formed.
    [2]
    2. Chair according to claim 1, characterized in that the surface element (11) with the plurality of fastening elements (17) is integrally formed.
    [3]
    3. Chair according to one of the preceding claims, characterized in that the fastening elements are formed as hooks (17) which are hooked in the fief frame and / or in the seat frame.
    [4]
    4. Chair according to one of the preceding claims, characterized in that on the back frame and / or the seat frame, a plurality of through holes are provided, in which the fastening elements of the surface element (11) engage.
    [5]
    5. Chair according to one of the preceding claims, characterized in that the surface element (11) is prestressed on the back frame and / or on the seat frame.
    [6]
    6. Chair according to claim 5, characterized in that the bias causes a width expansion between 3% and 10% and preferably between 5% and 8% of the surface element (11).
    [7]
    7. Chair according to one of the preceding claims, characterized in that the dimensions of the width of the stress-free surface element (11) between 3% and 10% and preferably between 5% and 8% are smaller than the width dimension of the back frame, whereby the surface element ( 11) is biased in the horizontal direction on the back frame.
    [8]
    8. Chair according to one of the preceding claims, characterized in that the surface element (11) consists of a thermoplastic polyurethane (TPU).
    [9]
    9. Chair according to one of the preceding claims, characterized in that the surface element (11) with the plurality of fastening elements (17) is a one-piece injection-molded part.
    [10]
    10. Chair according to one of the preceding claims, characterized in that the surface element (11) has the shape of a network with mesh passages (21) and web webs (25).
    [11]
    11. Chair according to claim 10, characterized in that the carrying capacity of different areas of the clamped surface element (11) by the thickness and the length of the web webs (25) and the measure of the bias is adjustable.
    [12]
    12. Chair according to one of the preceding claims, characterized in that the fastening elements (17) are made of the solid.
    [13]
    13. Chair according to one of claims 3 to 12, characterized in that the hooks (17) facing the back frame or the seat frame and with the surface element (11) an angle between 20 degrees and 80 degrees, preferably between 30 degrees and 70 Degrees and more preferably between 40 degrees and 60 degrees.
    [14]
    14. Chair according to one of the preceding claims, characterized in that the backrest frame or the seat frame is in one piece.
    [15]
    15. Chair according to one of claims 1 to 13, characterized in that the back frame or the seat frame comprises a clamping frame (13) for clamping the surface element (11) and a (15) holding frame, with which the clamping frame is connected.
    [16]
    16. Chair according to one of the preceding claims, characterized in that the TPU has a tensile strength between 10 and 25 MPa, preferably between 15 and 20 MPa and more preferably between 17 and 19 MPa.
    类似技术:
    公开号 | 公开日 | 专利标题
    EP2386222B1|2013-04-03|Backpack with adjustable fastening for the shoulder straps
    DE2310732A1|1973-09-20|DEVICE FOR THE PRODUCTION OF WALL COVERINGS
    EP2528477B1|2014-01-08|Seating furniture
    EP3452182B1|2021-09-22|Cable hook for a cable loop of a trampoline jumping sheet
    DE3723454A1|1988-01-28|MEANS FOR DETERMINING A FABRIC OR LEATHER COVER ON A COMPONENT
    DE202004021599U1|2009-05-14|seat structure
    WO2012139759A1|2012-10-18|Fastening arrangement, seat cover, vehicle seat and mounting method
    DE2045101C3|1974-09-05|Carrying device for seats, beds, loungers or trampolines
    EP2997856B1|2017-05-17|Chair covering
    DE10393010T5|2005-09-08|Clamping diaphragm or machine seat construction
    DE202016102181U1|2016-06-15|Organ which can be used as a support for a part, a component or the like
    DE19610845C2|1998-03-12|Upholstery element
    DE212018000010U1|2018-08-29|Backrest with adjustable angle for electric vehicles
    DE4206561A1|1992-09-03|Vehicle seat cover - has seat, backrest and backrest side portions, and includes elastic element fitted to side portion edges, pulling curved edge sections together at backrest to seat portion joint
    DE19516161A1|1995-11-09|Tension device for upholstery covers
    DE102005002690A1|2006-07-27|Vehicle seat comprises a cushion section, a covering for the cushion, and attachments that pass through the cushion at various points
    EP3009048A1|2016-04-20|Seating
    DE202004005703U1|2004-08-19|upright profile
    CH483942A|1970-01-15|Seat for automobiles
    DE202014105754U1|2015-03-16|Fixing structure of fan runners
    DE2421970A1|1975-11-20|Adaptable lightweight, easily produced seat unit - comprises two frames fitted with different coverings and paddings
    DE515164C|1930-12-30|Vehicle saddle
    DE2853010A1|1980-06-19|Clamping and stretching device for fitted bottom sheets - has round tension bar with holder for unravelling sheet over bed
    DE1168702B|1964-04-23|Retaining clip, especially for decorative strips
    DE202012011444U1|2013-01-25|Towel holder with cloth clip
    同族专利:
    公开号 | 公开日
    CH710131B1|2018-04-30|
    PL2997856T3|2017-10-31|
    EP2997856A1|2016-03-23|
    EP2997856B1|2017-05-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB1170073A|1966-02-23|1969-11-12|Pirelli Ltd|Upholstery Supports|
    US3767261A|1971-03-22|1973-10-23|D Rowland|Seating and sub-assembly for seats and backs and method for making same|
    BE1014711A3|2002-03-19|2004-03-02|Boschman Frank|Seating.|
    US20100001572A1|2006-11-10|2010-01-07|Hiroshi Masunaga|Chair backrest device|
    WO2009116033A1|2008-03-17|2009-09-24|Keter Plastic Ltd.|Article of furniture and attachment mechanism therefor|
    WO2010069411A1|2008-12-18|2010-06-24|Comatel Casuel|Seat cushion bottom element for a seat|
    US9003635B2|2008-04-08|2015-04-14|Formway Furniture Limited|Injection moulding method|
    NZ613957A|2008-12-12|2015-03-27|Formway Furniture Ltd|A chair, a support, and components|
    DE102009036958A1|2009-08-11|2011-02-17|Interstuhl Büromöbel GmbH & Co. KG|Back rest for office chair, has transverse brackets arranged at back rest frame, and covering unit fixed at transverse brackets using connection units e.g. welts, where length of brackets can be adjusted|
    DE102012001082A1|2012-01-20|2013-07-25|Klöber GmbH|Backrest for a chair|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH01415/14A|CH710131B1|2014-09-19|2014-09-19|Chair.|CH01415/14A| CH710131B1|2014-09-19|2014-09-19|Chair.|
    PL15184572T| PL2997856T3|2014-09-19|2015-09-10|Chair covering|
    EP15184572.4A| EP2997856B1|2014-09-19|2015-09-10|Chair covering|
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