EP0006840B1 - Support élastique flexible - Google Patents

Support élastique flexible Download PDF

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Publication number
EP0006840B1
EP0006840B1 EP79890018A EP79890018A EP0006840B1 EP 0006840 B1 EP0006840 B1 EP 0006840B1 EP 79890018 A EP79890018 A EP 79890018A EP 79890018 A EP79890018 A EP 79890018A EP 0006840 B1 EP0006840 B1 EP 0006840B1
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EP
European Patent Office
Prior art keywords
support
tensioning
belts
belt
support according
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
Application number
EP79890018A
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German (de)
English (en)
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EP0006840A1 (fr
Inventor
Wilhelm Ing. Schuster
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Individual
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Individual
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Publication date
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Publication of EP0006840A1 publication Critical patent/EP0006840A1/fr
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Expired legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C23/00—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D3/00—Lasts
    • A43D3/14—Stretching or spreading lasts; Boot-trees; Fillers; Devices for maintaining the shape of the shoe
    • A43D3/1433—Shoe-trees
    • 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
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means
    • A47C7/465—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means by pulling an elastic cable
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings

Definitions

  • the invention relates to a flexible elastic support consisting of at least one support; band of elastic, in the longitudinal extent essentially inextensible or non-compressible material and attached to the support band, approximately parallel to this by spacer tape, the tension of the support band is more or less curvable or resilient.
  • a support band made of metal or plastic known from AT-B-292 391
  • a backrest for an armchair in which a front flexible plate and a rear rigid plate are provided on a fixed frame, spacers which are adjustable in height and which engage the front flexible plate are arranged on the rigid plate .
  • spacers which are adjustable in height and which engage the front flexible plate are arranged on the rigid plate .
  • curved locations are formed in the flexible plate, the vertex of each curvature being determined by the set length of these spacers.
  • the curvature intended for the hollow part of the back of the user is supported by the longer spacer and is therefore relatively stiff. When the posture changes, this rigidly adjusted curvature does not follow the hollow part of the user's back that is now higher or lower, unless the spacer in question is manually adjusted to the desired height by another person.
  • a backrest known from DE-B-1 169 625 is constructed much more simply, because it consists of a rigid plate with transverse profile strips, in which elastic steel strips are held with their ends so that they curve.
  • the task of these steel straps is to adapt themselves to the user's body, so that a comfortable and anatomically correct support is provided for their back.
  • the object of the invention is to design the above-mentioned support so that, on the one hand, its curvature supports the back of the user so that the support effect is guaranteed even when the user is lying on his back, e.g. Slightly changed up or down during a long session (or car ride).
  • the support cited at the outset is characterized according to the invention by an unsupported curvature of the support band between two mutually, mutually or mutually displaceable spacers, the curvature of the support band being able to be enlarged or reduced by the tension band and more or a few by displacing the spacers is resilient or adjustable.
  • the curvature thus formed between two spacers differs from the known backrests essentially in that on the one hand it is sufficiently stiff or can be made so stiff to ensure sufficient support function, but on the other hand it is also so elastic that it changes slightly in position can follow the user's back while also maintaining the required support function.
  • the support according to the invention is much easier to handle than, for example, that according to the above-mentioned US Pat. No. 2,756,809, because the curvature in the support band can be made larger or smaller simply by actuating the tension band and can thereby be influenced in a single operation.
  • tension and support straps in a simple manner from sheet steel or metal, wood, plastic or the like. Stamped or injection molded, etc. and can be joined together with spacers that are just as easy to manufacture, so that the support according to the invention can be used only little material and labor can be produced. Due to the displaceability of the spacers on the tension and support band, it is in your hand where the curvature and to what extent and in what shape it should be formed.
  • two or more spacers it is also possible for two or more spacers to be connected to one another and to be displaceable together. This not only achieves a specially designed curvature in the support band, but also creates the possibility of moving this curvature from one point to another without changing the shape.
  • the invention also consists in that the spacers for displacement are provided with a handle or with a hydraulic, pneumatic, motor or other drive or a Bowden cable, a toggle lever, a set screw, a scissor lever or an eccentric. If the support according to the invention has already been installed or installed, the spacers covered thereby can nevertheless be easily adjusted from the outside by the handle or the like mentioned and the curvature can be shifted.
  • the spacers can be simple brackets which encompass the support and drawstrings transversely to their longitudinal direction.
  • the spacers are projections on the support band or tension band which engage in recesses in the tension band or support band or penetrate or encompass them.
  • the invention also consists in the fact that the recesses of the tension band are slots and that the projections of the support band engage in the slots with play.
  • a practical embodiment of the invention is characterized in that the above-mentioned projections double rivets or screws, sleeves, washers and. Like. Are with an average or more separate or uniform spacers against which two or more support and tension bands abut. This makes it possible to use commercially available rivets, screws, sleeves and washers, nuts, etc., which further simplifies and reduces the cost of the support according to the invention.
  • Another feature of the invention is characterized in that the play between the spacers of the support band and the slots of the tension band is different. In this case too, depending on the size of the game, a different load capacity of the support can be achieved, but can also be determined at different points on the support band as desired. Of course, a linear, progressive or degressive increase in the play size in the tension band can also be carried out in order to determine the load-bearing capacity of the support in a linear manner or otherwise.
  • the invention consists in that a wedge-shaped recess, an eccentric or toggle lever made of compressible or non-compressible or stretchable material or a pneumatic, hydraulic or motor drive element with a direct or remote-controlled handle engages or engages in the area of the projection, whose set position can be controlled or fixed either directly or indirectly (by external means).
  • a wedge-shaped recess an eccentric or toggle lever made of compressible or non-compressible or stretchable material or a pneumatic, hydraulic or motor drive element with a direct or remote-controlled handle engages or engages in the area of the projection, whose set position can be controlled or fixed either directly or indirectly (by external means).
  • the invention also includes the essential feature that a set screw held on the drawstring, a wedge-shaped recess, an eccentric or the like acts on the projection or spacer of the support band directly or via an additional control band located inside or outside.
  • This further control band therefore carries set screws, a wedge-shaped recess or an eccentric and can be operated from one point, with slots in the tension band saved, since the spacers work directly with the assigned screws, wedge-shaped recesses or with the eccentrics and can be influenced via the control band.
  • the invention is further characterized in that a tensioning device acts on the one hand on one or more tension bands and on the other hand on the support bands.
  • a tensioning device acts on the one hand on one or more tension bands and on the other hand on the support bands.
  • a more or less large curvature can be produced within some or all of the tension and support straps, namely over the entire length or parts of the support.
  • the tensioning device will be expedient if large forces are required to tension the support or if a counter-rotating, supplementary, pulsating or similar total or partial curvature or loading, an oscillation or the like are controlled in relation to the spacers and their control should.
  • drawstrings or an additional drawstring e.g. attack about half the length of the support straps or the like on these or other parts. This allows parts of the support band to remain unaffected or to be influenced differently from the rest of the part, it being possible to shift the curvature or to change the load capacity, the elasticity of the support or a support part by using one or more additional drawstrings.
  • one or more tensioning devices to engage one or more support and tension bands or groups thereof.
  • a support designed in this way can be curved in any variation and combination.
  • the invention also consists in that a bowden cable, articulated lever, wedge, eccentric lever, a threaded spindle or a compression or tension spring, a hydraulic, pneumatic or motor drive, an automatic control by air pressure, photo cell, gravity as a tensioning device on the support or tension bands , Centrifugal force and other external influences.
  • the invention is also characterized in that spacers are used for the same length or different lengths between the immediately adjacent tension and support bands lying one above the other or one next to the other. Single or multiple curvatures can thus be fixed during the manufacture and fixing of the support.
  • a special embodiment of the invention is characterized in that a hose surrounding the tension and support bands is provided as a spacer with a cavity expanded at one or more points, in which a section of the support band engages in the tensioned state.
  • the use of a uniform tube instead of the individual spacers further simplifies the support, but a curvature can be caused at a certain point with the same effect. It is particularly advantageous according to the invention if the hose is arranged to be displaceable in the longitudinal direction or rotatable about its longitudinal axis on the tension and support belts, because with this measure a displacement of the curvature from one location to another can be accomplished easily and comfortably.
  • a sliding material or rollers are arranged between the spacers and the support and tension bands.
  • This embodiment of the invention will be used wherever it is necessary to be able to shift the curvature even under load. It has proven to be expedient that a rope, a chain or a similar tension element rests on the rollers of the spacers instead of a band or is guided through the rollers.
  • the support bands form a lattice-shaped unit or a plate punched out of a piece of material and that the drawstrings either penetrate protrusions on the plate or are held on the plate by spacers. This results in a particularly simple type of manufacture for the supports according to the invention, which no longer have to be connected to one another separately.
  • the invention can also be seen in that the drawstrings only engage at one end or at other points of the lattice-shaped unit or plate and are optionally connected to a tensioning device.
  • a middle tension band is adjacent to two outer support bands, that the middle tension band and the outer support bands are connected at one end, that the other end of the middle tension band is connected to a tensioning device and the other ends of the outer support bands are supported in the area of the tensioning device and that the spacers are U-shaped brackets which are fastened to the support straps and which engage under the drawstring with their webs, the webs being provided with rollers and / or with sliders.
  • This embodiment of the invention is particularly easy to implement, since it is only necessary to start from a common body which contains tension and support straps and can be produced, for example, from plastic by injection molding.
  • the associated components for the adjustment mechanism are just as simple.
  • the invention also provides that the middle drawstring is connected to support straps which form a structural unit with U-shaped brackets, that transverse slots are provided between the individual brackets can be seen which are narrower, wider, longer, shorter than or the same width as the stirrups and that the stirrups in the area of the tensioning device are higher, lower or the same height as the stirrups which connect to the common end for tension and support straps and that the tensioning device consists of an angle piece with an elongated slot for the passage of the tension band and a slide which is adjustable transversely to the tension tape via a screw spindle or the like and which bears on one side of the leg of the angle piece which has the elongated slot, that on the other side of the leg the support straps are supported and that pins rest against the wedge-shaped recesses of the slide at the end of the drawstring passing through the long slot of the leg, the screw spindle engaging in a thread of the short right-angled leg of the contra-angle handpiece or being actuatable by
  • an approximately backrest-shaped body has one or more incisions running in the longitudinal direction from bottom to top, that the incisions serve to receive tension bands which are attached at one end to the backrest-shaped body their other ends are fixed to a tensioning device and are supported over their entire length by spacers which are U-shaped and fastened or guided on the front or back side of the backrest-shaped body or are produced in one piece with it or with the drawstrings.
  • the tensioning device consists of a slide with wedge-shaped recesses and one or more screw threads penetrating a thread of the backrest-shaped body in the backrest-shaped body transversely to its longitudinal direction and that pins of the drawstrings rest on the wedge-shaped recesses.
  • the invention can be made even simpler and lie in the fact that the plate has rollers arranged at a distance from one another on its rear side, that traction cables or tension bands are fixed to each of the rollers or on the plate in order to place the rollers arranged one above the other in a zigzag fashion and are expediently guided from a roller at the lower edge of the plate to a tensioning device. It can be seen from this that the least amount of material is required for this variant of the invention.
  • FIG. 1 shows a support designed according to the invention in the diagram
  • FIG. 2 shows a corresponding side view
  • FIG. 3 shows a side view of a support according to the invention with spacers that carry rollers
  • FIGS. 4, 5, 6, 4A, 5A to C. and FIGS. 6A to E show various simple exemplary embodiments for a tensioning device acting on the supporting and pulling belts, diagrammatically and schematically
  • FIGS. 7 to 19 consistently show exemplary embodiments of a tensioning device which is fastened to pulling and supporting belts, in plan and side views or sectional views
  • 20 to 24 show schematically and in side view further exemplary embodiments of a support according to the invention.
  • 25 to 29 illustrate in perspective further variants of the support according to the invention in the form of backrests.
  • 30 and 31 each illustrate a tensioning device which is supported by springs.
  • the support designed according to the invention consists of two upper support bands 1, 2 and two tension bands 3, 4 underneath, which are connected at one end by one of a plurality of cross struts 5 to one another and at their other ends with a Lever shear tensioning device 10 are held together, the support straps 1, 2 being fastened to the upper cross members 11, 12 and the tension straps 3, 4 to the lower cross members 13, 14. If the spindle 15 of this clamping device is e.g.
  • the tension and support bands 1 to 4 are held together by some bow-shaped spacers 22 to 29, the middle spacers 24 to 27 in a common e.g. plate 30 arranged below the drawstrings are anchored and allow a greater distance between the drawstrings and support bands 1, 3 or 2.4 than the other spacers 22, 23 and 28, 29.
  • the spacers 24 to 27 are equipped with rollers, which rest on the support bands 1, 2.
  • a lever-like handle 31 engages on the plate 30, specifically with a bolt 33 passing through an elongated slot 32, the handle in the drawstring 3 having a pivot point 34 about which it can be pivoted.
  • the handle 31 is pivoted in the direction of the arrow 35, the plate 30 and thus all the spacers 24 to 27 are displaced upward, but when the handle 31 is pivoted in the direction of the arrow 36, the plate 30 is displaced downward.
  • the support bands 1, 2 and / or the tension bands 3, 4 are made of an elastic material, such as iron, sheet steel or plastic, which is essentially inextensible or non-compressible in the longitudinal direction, the support bands 1, 2 will adhere to the Tension bands 3.4 attacking tensile force in total velvet, ie bend over its entire length. However, where the distance between the spacers is greatest in the longitudinal direction of the bands, the support bands can bend the most, so that in the arrangement shown in FIG. 1, the sections 37, 38 between the spacers 24 and 26 or 25 and 27 are most curved.
  • the curved sections 37, 38 can also be moved up or down as desired.
  • the cross struts 6 to 9 are fastened to the support bands with bolts 39 to 46 so that they are at a distance from the support bands 1, 2 and allow the rollers of the displaceable spacers 24 to 27 to pass through.
  • the support shown in FIG. 1 is installed in a backrest of an armchair or a seat in a motor vehicle or the like and the handle 31 protrudes laterally from the backrest, so that a 31 simply by adjusting the handle Adjustment of the backrest curvature to the seated person's back can be made.
  • the strength of the curvature can be easily adjusted by rotating a rotary handle that is also arranged laterally (not shown) on the spindle 15.
  • rollers 3.4 can also be arranged on the plate 30 below the drawstrings, which ensure that the plate 30 slides on the drawstrings 3, 4 without causing excessive friction.
  • sliders can also be arranged at the ends of the spacers 24 to 27 or between the tension bands 3, 4 and the plate 30.
  • the handle 31 can of course be replaced by a hydraulic, pneumatic or motor drive, and the actuating elements of such a drive can be arranged in the vicinity of the support or at a certain distance therefrom.
  • an eccentric which acts directly on the plate 30 or on the handle can also be provided, the rotation of which causes the plate 30 to be displaced.
  • FIG. 2 shows that the spacers 24 to 27 in the position set in FIG. 1 form a curvature 47 which is approximately half the height of the support 48.
  • the spacers 24 to 27 are moved downward by pivoting the handle 31 in the direction of the arrow 36 (FIG. 1), the curvature 47 'indicated by dash-dotted lines will result, which is thus laid in the lowest region of the support 48 is.
  • the plate 30 ' is arranged between the tension bands 3, 4 and the support bands 1, 2 in such a way that the four spacers 49, 50, 51, 52 connected to it with rollers on both the support as well as on the drawstrings 1 to 4 and can slide on them when the plate 30 'is moved.
  • the roles are so small that they are not hindered in their movement on the support bands 1, 2 by the cross struts 7, 8, 9.
  • a laterally protruding handle, not shown, can be attached to this plate 30 'in a similar manner to that in FIG. 1, by means of which the aforementioned adjustment of the curvature can be carried out.
  • a simple lever tensioning device 53 engages at the ends of two tension and support straps 1 to 4, which consists of a cross strap 56 fastened to the support straps 1, 2 with rivets 54, 55 or the like and a control belt 59 fastened with rivets 57, 58 or the like to the tension belts 3, 4, which is aligned parallel to the cross belt 56 and lies between the tension and support belts 3, 1 and 4, 2, respectively.
  • the rivets 54, 55 pass through long slots 60, 61 in the tension bands 3, 4 and the rivets 57, 58 pass through long slots 62, 63 in the support bands 1, 2.
  • the cross belt 56 and the control belt 59 are articulated at one end to a hand lever 64.
  • the control band 59 comprises the rivets 57, 58 from one side with wedge-shaped recesses 65, 66 and is supported on its other side on rollers 67, 68 which are fastened in the support bands 1, 2 and, if appropriate, the tension bands 3, 4 with in Long slots engaging pins can also enforce. Therefore, when the hand lever 64 is pivoted in the direction of the arrow 69, the control band 59 urges the tension bands 3, 4 in via the wedge-shaped recesses 65, 66 and the rivets 57, 58.
  • the rivets 57, 58 can be rotatably fastened in the drawstrings 3, 4 or provided with rotatable sleeves.
  • the device 72 shown in FIG. 6 can be provided, which consists of a base band 73, for example firmly connected to the support bands 1, 2 via the rollers 67, 68, and a control band 74 which can be displaced thereon and which can be designed in this way as the control band 59 of the tensioning device 53 and acts in the same way on the tension bands 3, 4 when it is pulled by turning a tension screw spindle 75, 76 in the direction of arrow 77, as indicated by arrow 78. At the end of 79 the Tension screw 75, 76 can attack a rotary knob, not shown.
  • a tensioning device 80 is also conceivable, as shown in FIG.
  • This tensioning device 80 consists of a control band 81 which is arranged between the support and tension band 1 and 3 and is oriented transversely to the latter and which lies with wedge-shaped sections 82, 83 on a roller 84, 85 of the support and tension band 1, 3 and these two bands in the sense of arrows 86, 87 moves against each other as soon as a train on the control belt 81 in the direction of arrow 88 takes effect.
  • the roller 84 expediently passes through the tension band 3 in a slot 89, and keeps the tension and support bands 1, 3 at a distance from one another.
  • the support band 1 projects with its one end 90 beyond the control band 81, which is held at least temporarily in this way between the bands 1, 3.
  • a double control band 59 ' can run transversely to the.
  • Tension band 3 ' this be arranged according to Figure 4A, but four guide rollers 57', 58 ', 57 ", 58" are arranged on a common base band 73' so that both the double control band 59 'and the tension band 3' are guided is.
  • the wedge-shaped recess 65 ' displaces a pin 57 "' of the tension band 3 'in the direction of arrow 70', so that a curvature in the associated support band, not shown, will result.
  • basebands 73 ', 73 "etc., as shown in FIG. 4A are strung together and, as described earlier, connected to one or more tension bands 3', 1 'via spacers, these basebands 73', 73" can function from support bands in which the desired curvature can be caused.
  • an eccentric lever 81 ' can be rotatably fastened on the tension band 3 "and bear against an end 2' of the support band 2" adapted to the eccentric 81 ", so that when the eccentric lever 81 'is pivoted in the direction of arrow 86' the tension band 3 "is moved in the direction of arrow 86", which slides with a pin 84 'in a slot 89' of the support band 2 ".
  • a similar displacement effect for the support band 2 ′′ ′′ in FIG. 5B results when a lever 81 ′′ ′′ passing through the tension band 3 ′′ with its eccentric 81 ′′ ′′ swings in one or the other direction of the arrows 86 ′′, 86 ′′ is because the eccentric 81 "'then abuts either against one or the other side of a recess 65" in the support band 2 "' in an urgent manner.
  • a swivel lever with a gear engages in a toothing of the tension band and, when it is rotated in one direction or the other, causes the tension band to shift relative to the support band, which in this case accommodates the bearing point of the swivel lever.
  • a Bowden cable 64 ' can be used according to FIG. 6A, the sleeve 64 "of which is anchored to a base and the rope 64"' of which can engage on a control band (not shown) or directly on the tension band.
  • a scissor lever 53 'connected to the Bowden cable can optionally be supported by a spindle 79 "with a handle.
  • a worm drive 60 'with an eccentric disk 61' can rest against a tension band 1 ", which is displaced in the direction of arrow 77" "when the worm drive is actuated, specifically in the direction of arrow 70".
  • the tension band 1 " is guided on a base band 73" via a pin engaging in a slot and will cause a curvature in the support band 4 ', to which it can be connected at the ends (not shown).
  • 6C, D and E illustrate schematically that there is a curvature over the length of the band in a central displacement position of the support and tension band and that with a further tension of the tension band in the support band, a second stronger curvature is formed between the support point and the spacer can.
  • FIG. 7 Another tensioning device 91 can be seen in FIG. 7.
  • Two adjacent scissor lever joints 96 to 99 act on adjacent and superposed tension and support bands 92 to 95, which in turn are connected at their articulation points 100, 101 with a screw spindle 102 and a nut 103 guided thereon in such a way that when the spindle knob 104 rotates, in the direction of arrow 105, the articulation points 100, 101 are moved apart and, accordingly, the drawstrings 93, 95 are moved in the direction of the arrows 106, 107.
  • the desired curvatures are formed in the support bands 92, 94, which not only can be precisely determined in their extent via the spindle rotation, but can also be fixed in the set position.
  • a Bowden cable 108, 109 acting on the articulation points 100, 101 and shown in FIG. 9 can also be provided with a pawl lock 111, 112 attached to an adjusting lever 110 for fixing the setting position.
  • FIG. 7 illustrates a tensioning device 113, which is similar to that in FIG. 7 and also has four articulated levers 114 to 117, but with opposite threads of the spindle 120 engaging in the connection articulated joints designed as nuts 118, 119, so that a rotary movement of the knob 121 in Direction of arrow 122 a movement of the Nuts 118, 119 to each other and an opposite displacement movement of the tension and support straps 123, 124 and 125, 126 results.
  • FIG. 10 Another simply constructed but particularly effective tensioning device 127 is illustrated in FIG. 10.
  • the spindle 128 passes through an end body 129 of the one tension band 130 and engages in a nut 131 which is connected in an articulated manner to the support band 133 via a tab 132.
  • a further joint bracket 134 is provided between the end body 129 and the bracket 132.
  • the nut 131 approaches the end body 129 of the tension band 130, so that the support band 133 will move in the direction of the arrow 137 because the tab 132 as a result of its articulation on the joint plate 134 transmits the movement of the nut 131 to the support band 133 in the form of a displacement in the direction 137.
  • the extent and the locking of the desired curvature in the support band 133 can be correctly determined.
  • the spindle 128 is connected in a rotationally fixed manner to another spindle 138, passes through an end body 139 of a further tension band 140 and engages in a nut 140 ', which in turn is connected in an articulated manner to a further support band 142 via a plate 141, here also between the plate 141 and the end body 139 engages a hinge plate 143, the same movement sequences result for the right part of the device in FIG. 10 as for the left part when the button 135 is set in rotation.
  • the knob 135 is rotated, the desired curvature can be produced and fixed both in the support band 133 and in the support band 142.
  • a piston rod 144 of a piston 145 can be provided according to FIG. 11, which is acted upon from one side or the other in a hydraulic cylinder 146 and thereby the control movements of the support bands 133, 142 already described above in order to form curvatures evokes.
  • an eccentric lever 148 is articulated on the one hand with a tension band 149 and on the other hand with a spindle 150 which is supported on an end piece 151 of an angle plate 152, one leg 153 of which is supported of the eccentric 148 serves.
  • the spindle bolt 156 engaging in a slot 155 also rotates the eccentric lever 148 in such a way that it moves the tension band 149 in the direction of arrow 157 relative to the support band 158 designed as a plate, so that in the support band 158 a curvature can be formed, which is also supported at one end on the leg 153 and at the other end is connected to the drawstring 149 (not shown).
  • a flexible intermediate layer 159 ensures a distance between the bands 158, 149; the intermediate layer 159 may be provided with a guide 160 surrounding the drawstring 149.
  • the bands 149, 158 are surrounded by wide enveloping bodies 161 to 163 which have at least partially wedge-shaped abutting surfaces
  • the curvature in the support band 158 is built up as long as it moves in the direction of the arrow 164 can be until the enveloping bodies 161 to 163 lie together with their wedge-shaped abutting surfaces. Because of their design, it is therefore possible to determine the size and position of the curvature that is to be formed in the wide enveloping bodies 161 to 163. Where an enveloping body 163 has only right-angled abutting surfaces, the curvature will at least assume a more or less elongated course due to the large radius of curvature.
  • two eccentric levers 167, 168 connected to one another by a tab 166 are supported on the leg 169 of a winding plate 170 and are with two.
  • the underlying support band, forming a single plate 169 ' only bears against the leg 169 and, depending on the degree of pivoting of the eccentric lever 167, forms a more or less large curvature.
  • strips can also be provided in which the desired curvature is generated.
  • a tensioning device 173 consists of an eccentric lever 174 with an eccentrically arranged slot 175, in which a pin 176 of the tension band 177 engages, which, when the eccentric lever 174 is rotated in the direction of the arrow 178 in the Slot 175 and also along the elongated slot 179 of the support band 180 moves, so that a mutual displacement takes place between the tension and support bands 177 and 180 because the support band 180 is fixed in the pivot point 181 of the eccentric lever 174.
  • This displacement of the tension band 177 also leads to a more or less large curvature in the support band 180, depending on how far the eccentric lever 174 is pivoted.
  • FIGS. 18 and 19 Another tensioning device 181 shown in FIGS. 18 and 19 also has an eccentric lever 182 which, with a circular disk 183, moves into a corresponding position Taking the support band 184 engages.
  • a pin 185 sits eccentrically on the disk 183 and engages in a transverse slot 186 of the tension band 187.
  • the pin 185 slides in the transverse slot 186 with simultaneous entrainment of the tension band 187 in the direction of arrow 189, so that the support band 184 designed in this case as a plate will curve as much as the eccentric lever 182 is pivoted.
  • FIG. 1 A particularly easy-to-shift curvature of a support according to the invention can be seen in FIG.
  • Support and tension band 190, 191 are firmly connected at one end by a rivet 192 or the like.
  • Two or more spacers 193, 194 can loosely or firmly enclose the bands 190, 191.
  • Further spacers in the form of roller pairs 195, 196, 197, 198 held together can be displaced on the bands 190, 191 via an additional rigid control band 199, which acts on both pairs of rollers 195 to 198 and can be guided between the support and tension band 190, 191.
  • a curve 201 is formed in the support band 190 between the pairs of rollers, which, however, depends on the movement of the control band 199 in one direction or the other ( Arrow 202) can be shifted.
  • the most distant curvatures formed by displacement are illustrated with a continuous line (201) and with a dashed line 203.
  • the control band 199 can be connected to a handle, not shown, or it can also be motor, hydraulic, electromagnetic and. Like. Be driven. Since the pairs of rollers 195 to 198 have only a low rolling resistance when they are adjusted on the belts 190, 191, their adjustment is also possible if the curvature 201 in the support belt 190 is pronounced.
  • FIG. 21 Another way of adjusting such a curvature within the support band is illustrated in FIG. 21.
  • knee lever pairs 206, 207 are attached as spacers between the support and tension band 204 and 205 and are connected to one another by arms 208, 209 and 210 in such a way that with a pivotable handle 210 'engaging the arms 208, 209, the one knee lever is stretched and the other can be bowed.
  • the toggle lever 206 is stretched, so that the curvature 211 is formed on the left side of the support band 204 in FIG. 21 after a force in the direction of the arrow 212 was effective on the tension band 205.
  • the spacer 214 located at the fixed end of the bands 204, 205 can be fixed immovably on this.
  • the other spacer 215 is advantageously only firmly connected to the support band 204, while the tension band 205 can slide in the spacer 215.
  • toggle lever 206 is fastened to the support band 204 with its tab 216. On the underside of the drawstring 205, however, the toggle levers 206, 207 engage with rollers 217, 218, which create a movement compensation when the drawstring and the support strap are moved against one another.
  • a control band 219 which can be operated from the outside and which can be handled like the control band 199 in FIG. 20 can also act on the toggle lever 207.
  • a Bowden cable 228 engages on the scissor lever 224 fixed to the support band 222 with a tab 227, the casing 229 of which is supported on the other scissor lever 225.
  • the Bowden cable 228 By operating the Bowden cable 228, as can be seen from the dashed line, the curvature 230 caused in the support band 222 can be shifted to the right in FIG. 22 because the scissor levers 224, 225 are brought closer to one another on one side and to one another on the other side be moved.
  • a screw, an eccentric or the like can of course also engage the relevant lever ends.
  • a particularly simple embodiment of the invention is obtained if, according to FIG. 23, a stiffness is achieved on the support belt between the support and tension belt 231, 232, which, as described above, are connected to one another and are held together by spacers 233, 234 231 engages control band 235, by the tension or pressure in one direction or the other 236, 237 a curvature 238 generated in the support band 231 by the tension band 232 can be displaced.
  • the shift of the curvature to the right in FIG. 23 is indicated by dashed lines.
  • the tension and support band 239, 240 are firmly connected at their ends with a hinge 241, 242, the upper scarving parts being held together by an articulated arm 243.
  • a screw spindle 244 with handle 245 engages, when it rotates in one direction the angle ⁇ 1 between the hinge parts and thus the ends of the tension and support band 239, 240 is adjusted to a larger value, for example (3 2 With such an adjustment, the angle ⁇ 1 between the parts of the other hinge 241 also changes to a smaller value, namely a 2 , so that the curvature 246 previously formed in the support band 240 is shifted to the other side of the support according to the invention, such as this is indicated by dashed lines 247. It is clear that, depending on the rotation of the screw 244, any desired intermediate position and thus any position for the curvature between the two extreme positions shown can be achieved.
  • a medium wide tension band 248 is connected to the same material at the top end with two side support bands 249, 250, but at the bottom end, which passes through a slot 251 of an angle piece 252, is provided with pins 253, 254, which counteract Wedge-shaped recesses 255, 256 of a slide 257 abut, which is supported on the long leg of the angle piece 252 from below and engages with a screw 258 in a thread of the short leg of the angle piece 252.
  • the free ends of the support bands 249, 250 are supported on the upper side of the long leg of the angle piece 252.
  • U-shaped brackets 259 with rollers 260 or sliders 261 are provided, against which the drawstring 248 rests (FIG. 26).
  • the brackets 265 can form a unit with the support bands 266, 267 and with one another slots 268 which are so wide that they can be tightened by the tension band 248 sliding on the brackets 265, i. when the greatest possible curvature of the support bands 266, 267 are closed. The webs of these brackets 265 are then supported against one another in the greatest curvature position of the support.
  • the support according to the invention shown in FIG. 28 consists of a backrest-shaped body 269 made of plywood, metal, plastic or the like and can be injection molded, drawn or punched. It has incisions 270, 271 directed from the bottom upwards, accommodated in soft drawstrings 272, 273, which are fastened to the body 269 with their upper ends and have pins 274, 275 at their lower free ends, which, as in the case in FIG. 25 shown embodiment of the invention against wedge-shaped recesses 276, 277 of a slide 278, which is supported and guided in the lower parts of the body 269.
  • brackets 279 which serve to support the drawstrings 272, 273. Therefore, if the screw spindle 280 connected to the slide 278, which engages in a thread of the body 269, is rotated and moved in the direction of the arrow 281, the pins 274, 275 and the recesses 276, 277 of the slide 278 move of the drawstrings 272, 273 in the direction of the arrows 282, so that these drawstrings 272, 273 supported by the brackets 279 are tensioned. Their tension causes a further deflection of the body 269, which may already have a curvature from the outset.
  • FIG. 29 An even simpler embodiment of the invention is illustrated in FIG. 29.
  • a support 283, which is already curved from the outset, has rollers 284 to 291 arranged on its rear side in one or more vertical rows, around which tension bands 292, 293 are guided such that their one ends are fastened to the rollers 286 and 290 and above the others Rolls 285, 286, 284 and 287 or 289, 290, 288 and 291 e.g. laid in a zigzag shape and then guided away approximately horizontally in the lower region of the support 283 to a tensioning device, not shown.
  • All or individual supports can also have one or more "intrinsic curvatures" into which the support from can, from the outset, also in its entirety or only through individual or all support, pressure or tension elements, spacers, tensioning or control mechanisms or through additional springs or spring elements wants to return himself as soon as the influence exerted by a tensioning device ceases to exist.
  • the change and / or shifting of one or more curvatures can be brought about by "slackening instead of by tension, tensile or compressive force or by external influences (e.g. leaning), so that only a" fixation of the respective curvature e.g. by clamping, toggle or by slightly turning or releasing the control or tensioning device.
  • All of the features of the invention cited can be combined with one another or with any other structural or structural elements (directly or via damping or other aids) or exchanged as desired.
  • FIG. 30 shows a tensioning device 295, which is essentially that in FIG Fig. 1 corresponds to the leaf springs 296, 297, which have a degressive characteristic.
  • the leaf springs 296, 297 namely have an inward curvature (dashed line), into which they can never return due to stops or external hindrance.
  • the starting position for the longitudinal load is a slight opposite curvature. With further pressure load in their longitudinal direction, the leaf springs can only buckle against their inherent curvature (dash-dotted line). According to the buckling formulas, this results in a wrong spring characteristic. If the leaf springs 296, 297 rest on the tabs of the tensioning device 295 via their connecting members 298, the effect of this is supported.
  • a corresponding S-shaped spring 301 acts on the toggle levers of a similar tensioning device 302 and supports this in its effect, which support can of course take place in one direction or the other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Bridges Or Land Bridges (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Springs (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Buckles (AREA)

Claims (29)

1. Support élastique flexible ccmprenant au moins une bande de soutien (1, 2) en matière élastique pratiquement inextensible ou non compressible dans l'extension longitudinale et une bande de traction (3, 4) fixée à la bande de soutien (1, 2) maintenue à peu près parallèlement à celle-ci par des organes d'espacement (22 à 29) et par la tension de laquelle la bande de soutien (1, 2) peut être courbée ou chargée plus ou moins, caractérisé par une courbure sans soutien au sommet, prévue dans la bande de soutien (1, 2) dans chaque intervalle entre deux organes d'espacement (24 à 27) pouvant coulisser en se rapprochant l'un de l'autre, en s'éloignant l'un de l'autre ou conjointement, la courbure de la bande de soutien (1, 2) pouvant être augmentée ou diminuée par la bande de traction (3, 4) et pouvant être chargée plus ou moins ou être réglée par coulissement des organes d'espacement (24 à 27).
2. Support selon la revendication 1, caractérisé par le fait que deux ou plusieurs organes d'espacement (24 à 27) sont reliés entre eux et peuvent coulisser conjointement.
3. Support selon l'une des revendications 1 et 2, caractérisé par le fait que pour le coulissement, les organes d'espacement (24 à 27) sont munis d'une poignée (31), ou d'un entraînement hydraulique, pneumatique ou à moteur ou d'une gaine Bowden (228, 229), d'un levier de genouillère (206, 207), d'une vis de réglage (244), d'un levier en ciseaux (224) ou d'un excentrique.
4. Support selon l'une quelconque des revendications.1 à 3, caractérisé par le fait que les organes d'espacement (22, 23, 28, 29) sont des étriers qui entourent les bandes de soutien et de traction (1 à 4) transversalement à leur direction longitudinale.
5. Support selon la revendication 1, caractérisé par le fait que les organes d'espacement sont des saillies (54, 55, 57, 58) de la bande de soutien (1, 2) ou de la bande de traction (3, 4), qui s'engagent dans des évidements (60, 61, 62, 63) de la bande de traction (3, 4) ou de la bande de soutien (1, 2) ou traversent ou entourent celle-ci.
6. Support selon la revendication 5, caractérisé par le fait que les évidements (60, 61) de la bande de traction (3, 4) sont des fentes et que les saillies (54, 55) de la bande de soutien (1, 2) s'engagent avec jeu dans les fentes.
7. Support selon l'une quelconque des revendications 5 et 6, caractérisé par le fait que les saillies (54, 55, 57, 58) sont des rivets doubles ou des vis, des douilles, des disques ou analogues, présentant un élément d'espacement central ou plusieurs éléments d'espacement séparés ou solidaires contre lesquels s'appliquent deux ou plusieurs bandes de soutien et de traction (1, 2, 3, 4).
8. Support selon l'une quelconque des revendications 1 à 7, caractérisé par le fait que le jeu entre les organes d'espacement de la bande de soutien (1, 2) et les fentes de la bande de traction (3, 4) a une grandeur différente.
9. Support selon l'une quelconque des revendications 5 à 8, caractérisé par le fait que dans la région de la saillie (57, 58) s'engage ou s'applique un évidement en forme de coin (65, 66), un excentrique ou un levier de genouillère, formés de matière compressible ou non compressible ou extensible, ou un élément d'entraînement pneu- matiqpe, hydraulique ou à moteur, avec poignée directe ou télécommandée (64, 72), dont la position réglée peut être commandée ou fixée soit directement, soit indirectement (par des moyens indépendants).
10. Support selon l'une quelconque des revendications 5 à 9, caractérisé par le fait qu'à la saillie (57, 58) de la bande de traction (3, 4), une vis de réglage retenue sur la bande de soutien (1,
2), un évidement en forme de coin (65, 66), un excentrique ou analogue, s'applique directement ou par l'intermédiaire d'une bande de commande supplémentaire (59) placée intérieurement ou extérieurement.
11. Support selon la revendication 1, caractérisé par le fait qu'un dispositif de tension (10) s'applique d'une part à une ou plusieurs bandes de traction (3, 4) et d'autre part aux bandes de soutien (1, 2).
12. Support selon la revendication 11, caractérisé par le fait que les bandes de traction ou une bande de traction supplémentaire (235) s'appliquent, à peu près à la moitié de la longueur des bandes de soutien (231), à celles-ci ou à la bande de traction (232), aux organes d'espacement (233 ou 234) ou à un rembourrage placé autour ou à une matière de remplissage placée dans le support.
13. Support selon l'une quelconque des revendications 1 à 12, caractérisé par le fait qu'un ou plusieurs dispositifs de tension (91, 113, 127) s'appliquent à une ou à plusieurs bandes de tension et de traction ou groupes de celles-ci.
14. Support selon l'une quelconque des revendications 11 à 13, caractérisé par le fait qu'aux bandes de soutien ou de traction s'appliquent, comme dispositif de tension, une gaine Bowden (108), un levier articulé (114 à 117), un coin, un levier excentrique (148, 167, 174, 182), une tige filetée ou un ressort de compression ou de traction, un entraînement hydraulique (144 à 146), un entraînement pneumatique ou à moteur, une commande automatique à air comprimé, à cellule photoélectrique, à force centrifuge, à gravité, à force ascensionnelle, électrique, à ondes magnétiques ou rayons, à son, à agents chimiques ou corps liquides, gazeux ou solides.
15. Support selon l'une quelconque des revendications 1 à 14, caractérisé par le fait qu'entre les bandes de traction (1, 2) et les bandes de soutien (3, 4) immédiatement voisines, superposées ou juxtaposées, des organes d'espacement (22 à 29) de longueur égale ou différente sont insérés de façon continue dans la direction de l'espacement.
16. Support selon la revendication 1, caractérisé par le fait que comme organe d'espacement, un tuyau souple entourant les bandes de traction (3, 4) et de soutien (1, 2) est prévu et est muni d'une cavité s'élargissant en un ou plusieurs points et dans laquelle un tronçon des bandes de soutien s'engage dans l'état tendu.
17. Support selon la revendication 16, caractérisé par le fait que le tuyau souple est disposé sur les bandes de traction (3, 4) et de soutien (1, 2) de manière à pouvoir coulisser longitudinalement ou à pouvoir tourner autour de son axe longitudinal.
18. Support selon la revendication 1, caractérisé par le fait qu'entre les organes d'espacement (24 à 27) et les bandes de soutien et de traction (1, 2. 3, 4) sont disposés une matière de glissement ou des rouleaux.
19. Support selon la revendication 1, caractérisé par le fait que les bandes de soutien (1, 2) forment un ensemble en forme de grille, découpé dans une pièce de matière, ou une plaque (283) et que les bandes de traction (3, 4) traversent des saillies de la plaque ou sont retenues sur la plaque par des organes d'espacement.
20. Support selon la revendication 19, caractérisé par le fait que les bandes de traction s'appliquent simplement à une extrémité de la plaque (283) ou à un point ou saillie ou à un évidement de l'ensemble en forme de grille ou de la plaque (283) et sont reliées soit à un dispositif de tension, soit à un mécanisme de tension mécanique, hydraulique ou pneumatique.
21. Support selon la revendication 1, caractérisé par le fait qu'une bande de traction centrale (248) est voisine de deux bandes de soutien extérieures (249, 250), que la bande de traction centrale (248) et les bandes de soutien extérieures (249, 250) sont reliées entre elles à une extrémité, que l'autre extrémité de la bande de traction centrale (248) est reliée à un dispositif de tension (252 à 258), que les autres extrémités des bandes de soutien extérieures (249, 250) sont soutenues dans la région du dispositif de tension (252 à 258) et que les organes d'espacement sont des étriers en U (259) fixés aux bandes de soutien (249, 250) et s'engageant par leurs âmes sous la bande de traction centrale (248), les âmes étant munies de rouleaux (260) et/ou d'éléments de glissement (261).
22. Support selon la revendication 21, caractérisé par le fait que la bande de traction centrale (248) est reliée à des bandes de soutien (266, 267) qui forment une unité structurale avec des étriers en U (265), qu'entre les différents étriers sont prévues des fentes transversales (268) qui sont plus étroites, plus larges, plus longues, plus courtes ou aussi larges que les étriers, et que les étriers de la région du dispositif de tension sont plus hauts, plus bas ou de même hauteur que les étriers qui se raccordent à l'extrémité commune destinée aux bandes de traction et de soutien.
23. Support selon l'une quelconque des revendications 21 et 22, caractérisé par le fait que le dispositif de tension est formé d'une équerre (252) avec fente allongée (251) pour le passage de la bande de traction centrale (248) et d'un coulisseau (257) réglable transversalement à la bande de traction (248) au moyen d'une tige filetée (258) ou par un moyen similaire et qui s'applique contre l'un des côtés de l'aile de l'équerre (252) qui présente la fente allongée (251), que contre l'autre côté de l'aile s'appuient les bandes de soutien (249, 250) et que des tenons (253, 254) prévus sur la bande de traction (248) à l'extrémité qui traverse la fente allongée (251) de l'aile s'appliquent contre des évidements en forme de coin (255, 256) du coulisseau (257), la tige filetée (258) s'engageant dans un filetage de l'aile courte coudée à angle droit de l'équerre (252) ou pouvant être actionnée par un excentrique.
24. Support selon la revendication 1, caractérisé par le fait qu'un corps (269) à peu près en forme de dossier présente une ou plusieurs entailles (270, 271) se dirigeant de bas en haut dans sa direction longitudinale, que les entailles (270, 271) servent à recevoir des bandes de traction (272, 273) qui sont fixées par l'une de leurs extrémités au corps en forme de dossier (269), sont fixées par leur autre extrémité à un dispositif de tension (274 à 278) et sont soutenues par des organes d'espacement (279) qui sont de forme creuse en U, trapézoïdale, rectangulaire, circulaire, ou fermée ou ouverte et sont fixés ou guidés, au côté antérieur ou postérieur ou dans le plan du corps en forme de dossier (269) ou sont fabriqués d'une seule pièce avec celui-ci ou avec les bandes de traction (272, 273).
25. Support selon la revendication 24, caractérisé par le fait que le dispositif de tension est formé d'un coulisseau (278) guidé dans le corps en forme de dossier (269) transversalement à la direction longitudinale de celui-ci et présentant des évidements en forme de coin (276, 277) et d'une ou plusieurs tiges filetées (280) traversant chacune un filetage du corps en forme de dossier (269) et que contre les évidements en forme de coin (276, 277) s'appliquent des broches (274, 275) des bandes de traction (272, 273).
26. Support selon la revendication 19, caractérisé par le fait que la plaque (283) présente à son côté postérieur des rouleaux (284 à 291) disposés avec espacement entre eux, que des câbles de traction (292, 293) ou des bandes de traction sont fixés chacun à un des rouleaux (286, 290) ou à la plaque (283), placés en zigzag autour des rouleaux superposés (285, 286, 284, 287, 289, 290, 288, 291) et de préférence guidés par un rouleau (287, 291) au bord inférieur de la plaque (283), jusqu'à un dispositif de tension.
27. Support selon la revendication 11, caractérisé par le fait qu'un ressort en S (300, 301) ou un ressort à lame (296, 297) s'applique, directement ou par l'intermédiaire de moyens auxiliaires, aux leviers de genouillère du dispositif de tension (302).
28. Support selon la revendication 18, caractérisé par le fait que sur les rouleaux des organes d'espacement (24 à 27) est appliqué, ou que par ces rouleaux est guidé, au lieu d'une bande, un câble, une chaîne ou un élément de traction similaire.
EP79890018A 1978-06-23 1979-06-20 Support élastique flexible Expired EP0006840B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT459978A AT358767B (de) 1978-06-23 1978-06-23 Biegsame elastische stuetze
AT4599/78 1978-06-23

Publications (2)

Publication Number Publication Date
EP0006840A1 EP0006840A1 (fr) 1980-01-09
EP0006840B1 true EP0006840B1 (fr) 1982-02-03

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Application Number Title Priority Date Filing Date
EP79890018A Expired EP0006840B1 (fr) 1978-06-23 1979-06-20 Support élastique flexible

Country Status (14)

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US (2) US4354709A (fr)
EP (1) EP0006840B1 (fr)
JP (1) JPS5952300B2 (fr)
AR (1) AR219799A1 (fr)
AT (1) AT358767B (fr)
BR (1) BR7904058A (fr)
CA (1) CA1113192A (fr)
CS (1) CS242854B2 (fr)
DE (1) DE2962040D1 (fr)
ES (1) ES481713A1 (fr)
MX (1) MX150056A (fr)
SU (1) SU971117A3 (fr)
YU (1) YU42189B (fr)
ZA (1) ZA792780B (fr)

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BR7904058A (pt) 1980-03-25
DE2962040D1 (en) 1982-03-11
CS242854B2 (en) 1986-05-15
AR219799A1 (es) 1980-09-15
JPS5952300B2 (ja) 1984-12-19
US4354709A (en) 1982-10-19
AT358767B (de) 1980-09-25
SU971117A3 (ru) 1982-10-30
US4452485A (en) 1984-06-05
CA1113192A (fr) 1981-11-24
MX150056A (es) 1984-03-06
JPS5544175A (en) 1980-03-28
YU148779A (en) 1983-01-21
ES481713A1 (es) 1980-02-16
ATA459978A (de) 1980-02-15
CS435779A2 (en) 1985-08-15
ZA792780B (en) 1980-07-30
EP0006840A1 (fr) 1980-01-09
YU42189B (en) 1988-06-30

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