Screen for seat or couch furniture, in particular Gartenstühle

The invention concerns screens for sit-hurries and/or the backrest of Sitzund the Liegemö eln, in particular Gartenstühlen, also in crossing directions running lattice bars, which are interconnected to curved, lattice at the Kreuzungsstellen by weld and from those to sit-hurry and/or at the backrest in transverse direction of running lattice bars continuous in each case in to, in particular at the Sitztell and/or because of the backrest concave right-angled level are and of other, to sit-hurry in Sitztiefenrichtnng and/or at the backrest in elevator direction running lattice bars are crossed, whereby in the lattice surface alternating reciprocally the Längsmittehchse of the respective lattice bar lying bending sections open to this longitudinal axle center are intended and only on a side of the respective longitudinal axle center liegeuden Bending sections the lattice bars running in transverse direction cross. Such screens are for sit-hurry and/or the backrest of Sitzund couch furniture and/or by Gartenstühlen not well-known. There is however lattices for itself bekanntgewordeu, with which bending sections open lying in the lattice surface alternating reciprocally the longitudinal axle center of the respective lattice bar to this longitudinal axle center are intended and only the bending sections which are on a side of the respective longitudinal axle center cross those crosswise to it running straight-line lattice bars. Furthermore a lattice is become known, with which all staffs are provided with curved sheets, whereby the staffs cross with curved sections. Thus a relatively small firmness of the lattice results, so that the sheets could be bent upward with use to a seat furniture by the arising loads. Also a flat bar lattice is become known, which consists of lattice bars of different cross section and exhibits transverse to the atomic plane practically no elasticity, so that it for the use at Sitzbzw. Couch furniture is unsuitable. With this lattice approximately straight-line lattice bars are crossed by alternating opposite bending sections exhibiting lattice bars, how each bending section is crossed by a straight-line lattice bar, so that in each case A! le bending sections being on both sides of the longitudinal axle center of the individual lattice bar by one geradlinigeu lattice bar to be crossed and with this group are. Thus results in itself extremely large lattice weight with small elasticity, since the lattice bars straight in those places, in which they could due to their training as bending sections a springy flexible deformation toward the atomic plane make possible, are immovably fixed by welded joints. The invention is the basis the task to create a screen particularly for seat and/or. Couch furniture and despite small weight and high firmness a sufficient, the comfort increasing elasticity is suitable has. This is reached with a screen of the initially described kind in accordance with the invention by that the lattice bars with the bending sections open lying in the lattice surface alternating reciprocally the longitudinal axle center of the respective lattice bar to this longitudinal axle center to sit-hurry in seat depth direction and/or. at the backrest in elevator direction run and the bending sections over for instance 180° are curved. Thus the lattice bars between the external delimitations of the lattice, verlaufeaden in transverse direction, can depart from the initial position from each other and/or one on the other-approach from the loaded condition again under flexible deformation of the bending sections, so that itself in surprisingly simple way an adjustment to Rückenbzw. Gesäßkrümmung furniture of the using person results in. Sitting hurry and/or. Backrests are to adapt in all rule in a certain measure to the roundnesses of the body form of the person, in order to avoid specifically high pressure loads and to make a comfortable sitting possible. Therefore with Sitzoder couch furniture frequently from the beginning concave and/or flat-like training of the seat part and/or the backrest are planned, in such a manner that the lattice to sit-hurry around in seat depth direction above the seat part a running and in the backrest around an axle lying in their Höhenrichttmg before the backrest also is curved if the lattice is not exposed to a load. This given curvature should not be subjected however as also as possible during load by heavy persons too large changes, but the lattice is, in order to be able to adapt to the spinal column curvature, essentially only in such a manner flexibly flexibly to deform that it curves around such axles, which lie right-angled to the axles mentioned. Thus on the one hand the gutter-like bowl form remains and on the other hand to kanu the lattice also to the curvatures of the spinal column and/or the back and the Gesäßes changing in Höheurichtung to adapt. Except an improved feather/spring characteristic of the seat part and/or the backrest also a very evenly distributed and the seat comfort of far improving lattice structure are reached by the training according to invention of the bending sections. Thus the lattice also during high load none to strong Rinnenbzw. Bowl curvature receives, is to sit-hurries and/or at the backrest in transverse direction verlaufeuden lattice bars approximately straight-lined trained. After a further characteristic of the invention larger and smaller bend-like bending sections at the same lattice bar alternate, whereby preferably the smaller bending sections the outer Kreuzungsstellen lie, so that these sections weakened by the Biegeverformung are strengthened by the welded joints. For example the bending sections which are because of the Kreuzungsstellen can have a radius of curvature, which corresponds for instance to the wire size, thus practically a bending equal. In this case then relatively large bending sections between the Kreuzungsstellen can be intended. Alternating in further training of the invention the bending sections have exhibiting lattice bars, larger and smaller distances from each other, thus Trade Union of German Employees with very small entire length of the lattice bars and thus with small lattice weight a favourable feather/spring characteristic are preferably reached. Sheet-well-behaved Biegeabschnltte can be at or between the Kreuzungsstellen intended, preferably in such a manner that between two neighbouring Kreuzungsstellen in each case only one bending section is intended, so that the density and elasticity of the lattice structure wished in each case can be achieved in a simple manner. With a very simple execution form of the invention article at least the bending sections of the respective lattice bar, in particular teilkrelsförmig, which are on a side of the longitudinal axle center, are bend-like trained, so that round, which result in clothes careful forms and even loads in the case of the springy deformation. Furthermore it is in particular possible by this training that opposite bending sections of neighbouring lattice bars are themselves approximately on a circle and from it a very close lattice structure results in. In particular, if the arc-shaped Biegeabschrätte lies between the Kreuzungsstellen, it is appropriate for the achievement of very durable Kreuzungsstellen, if the bending sections which are because of the Kreuzungsstellen exhibit the Kreuzungsstellen bilden& straight-line sections, which swore with one another and to whose length preferably for instance corresponds to the radius of the bend-like bending sections. In addition, straight-line sections can lie between the Kreuzungsstellen, whereby a favorable elasticity of the screen is reached. The invention is more near described in the following with further details; the designs show several Ausffihrungsbeispiele with the parts substantial for the invention approximately to scale. These parts are described, as far as they are not to be inferred from the designs so easily, on the basis the designs. There is represented in Fig.1 according to invention a Gartenstuhl in front view, provided with a Drahtgltter; Fig.2 the chair in accordance with Fig.1 in opinion from right; Fig.3 a further execution form of a screen in increased representation; Fig.4 to 7 further execution forms of screens on a scale in accordance with Fig.3. As the Fig.1 and 2 show, according to invention a Gartenstuhl provided with a screen points --1-- one sit-hurry --2-- and a backrest --3-- up, those essentially by a einstückigen Rohrrahmen --4-- are formed, at its Oberbzw. Front the screen --5-- is fastened. At both sides of the Rohrrahmens --4-- are legs of a chair --6-- planned, those within their upper range arm rests --7-- form. The screen --5-- is of sit-hurry --2-- into the backrest --3-- continuous by a piece in an educated manner, which in the transient area between sit-hurry --2-- and backrest --3-- bent and both within the range of the seat part --2-- and within the range of the backrest --3-- is concave curved, so that particularly comfortable sitting is ensured. Before the attachment at the chair --1-- is the screen --5-- evenly. This even screen --5-- points with its longitudinal axle centers lattice bars parallel lying side by side --8-- and essentially right-angled parallel to it among themselves likewise lattice bars lying --9-- up, those the lattice bars --8-- at KreuzungssteUen --10-- cross and at these Kreuzungsstellen --10-- with the lattice bars --8--, for example by spotwelds are connected. The lattice bars --8-- point between in each case two neighbouring Kreuzungsstellen --10-- an approximately semicircularly curved bending section --13-- up, whereby neighbouring bending sections --13-- over bending --11, 12-- into straight-line sections lying between them and with this opposite bending sections change --14-- form. All straight-line sections of the respective lattice bar --8-- swore with one another, whereby the straight-line sections at the associated in each case Kreuzungsstelle --10-- lie and/or these Kreuzungsstellen --10-- along-form. The length of the straight-line sections corresponds for instance to the radius of the curved bending sections --13--. In each case itself with their concave sides facing bend-like bending sections --13-- neighbouring lattice bars --8-- lie on a common circle, during in each case with their convex sides facing bending sections --13-- neighbouring lattice bars --8-- a distance from each other have, that about half of the radius of the bending sections --13-- corresponds. Opposite the lattice bars --8-- are all lattice bars --9-- with even screen continuous straight-lined trained. The even screen --5-- becomes before the attachment at the chair --1-- according to the desired form bent and curved and then with straight-line final sections --17-- the lattice bars --8-- and straight-line final sections --18-- the lattice bars --9-- at the Rohrrahmen --4-- fastened. By the descriptive training the screen forms --5-- a raster with circles --16--. The lattice bars --9-- run with it to sit-hurry --2-- in Querriehtung and at the backrest--3-- horizontal. With the execution form represented in Fig.3 neighbouring bending sections go --13a-- the respective lattice bar--8a--over Biegeabsehnitte curved opposite --14a--over, which are likewise approximately semicircular, their radius however only approximately for instance a third of the radius of the 13iegeabschnitte --13a-- corresponds. The distance of neighbouring, with the concave sides of the bending sections --13a-- each other turned lattice bars --8a-- it is in such a way selected that itself opposite bending sections --13a-- in each case these two lattice bars --8a-- on an oval --16a-- are appropriate, for its length smaller than the quadruple radius of the bending sections --13a-- is. The neighbouring lattice bars --8a--, itself with the convex sides of their bending sections --13a-- face, have in contrast to this a larger distance from each other, so that itself between the lattice bars --8a-- larger and smaller distances alternate. Those the lattice bars --SA-- crossing lattice bars --9a-- are straight-lined trained. With the execution form represented in Fig.4 the Biegeabsctmitte goes --13b-- the respective lattice bar --8b-- likewise over opposite semicircular bending sections --14b-- into one another over, whereby the radius of curvature of the bending sections --14b-- equal that of the bending sections: ton --13b-- is. All neighbouring lattice bars --8b-- have same distances from each other and become in the center of their bending sections --14b-- of the straight-line lattice bars --9b-- crossed. Similarly as the screen in accordance with Fig.4 also the screen is trained, there in accordance with Fig.5 the bending sections --13c and 14c-- of the straight-line lattice bars --9c-- crossed lattice bars --8c-- same radius of curvature have. With the concave sides of their bending sections --13c-- are opposite neighbouring lattice bars --8c-- have however a very small distance from each other, which corresponds for instance to the wire size, while with the convex sides of their bending sections --13c-- itself opposite neighbouring lattice bars --8c-- in contrast to this a substantially larger distance from each other have, that more largely than the radius of the bending sections --13c--, than double this radius is however smaller. With the execution form represented in Fig.6 are the bending sections --14d-- with a radius curved, equivalent or only slightly more largely than the diameter of the lattice bars --8d-- is, so that the bending sections --14d-- thus almost equal a bending around 180° and between the straight-line lattice bars --9d-- lying bending sections --13d-- a curvature diameter have, that approximately equal the distance of neighbouring lattice bars --9d-- is. Thus arise within the range of the bending sections --14d-- particularly firm connections with the lattice bars --9d--. With the execution form represented in Fig.7 are between neighbouring, opposite curved Biegeabschrätten --14e, 13e-- the lattice bars --8e-- straight-line Abschnite --15e-- planned, whereby the straight-line sections --15e-- each lattice bar --8e-- swore with one another. The length of the straight-line sections --15e-- is smaller than the radius of curvature of the bending sections --13e, 14e--. The straight-line sections --15e-- go over bending --lle, 12e-- into the bending sections --13e, 14e-- over. The distance of neighbouring lattice bars --8e-- is smaller than the wire size, whereby the lattice bars --8e-- of the straight-line lattice bars --%-- within the range of the bending sections --14e-- are crossed. The lattice can consist also of plastic wire od.dgL, whereby it can be manufactured as extruding lattices or in the way of the Ktmststoffschweißverbindung.