JPS59228809A - Seat - Google Patents

Abstract

1. Seat comprising a lower frame and upper frame (11) onto which supporting surfaces are fixed which are forming respectively the bottom and the back, in which at least one of the supporting surfaces is constituted by an elastic net formed of transversally disposed wires (12), each wire (12) comprising at least a permanent deformation (13) being situated preferably in the net plane, these permanent deformations (13) being resilient, characterized by the fact that each of these permanent deformations presents a linear portion shifted parallel to the rest of the wire and bound thereto by two oblique portions.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat in the form of furniture or for a vehicle that includes a suspension system that provides the desired support and comfort to the user.

Seats are already well known, especially for vehicles.
It comprises a bottom and a back which are respectively attached to the lower and upper frames by elastic devices, such as coil springs, and the whole is covered according to the intended use of the seat by applying padding material and/or covering.

Generally, the bottom and back portions suspended from the frame are formed of a rigid metal grid. However, the comfort provided by this type of seating is not always satisfactory;
This is particularly unsatisfactory for automotive applications where the user makes repeated and rapid movements.

In addition, the bottom and back suspension springs are subjected to extremely severe operating conditions, and their elastic properties relax relatively quickly;
And the suspension condition becomes insufficient. Finally, in this type of seat it is necessary to provide a frame of sufficient strength and thickness to compensate for the weakness caused by the holes provided for the suspension spring hooks.

It is therefore an object of the invention to provide a seat which eliminates the disadvantages of known seats with suspension methods of the type described. This object is achieved by the object of the invention, namely: the seat comprises a lower frame and an upper frame, on which support surfaces are attached respectively forming a bottom and a back, and the seat has a small It is characterized in that both of the supporting surfaces are constituted by an elastic net formed by laterally arranged wires, each wire being constituted by at least one elastically permanently deformed section.

The drawings show the general shape of an embodiment of the invention.

A known seat, in particular for a vehicle, is shown in FIG. 1 and comprises two lower frames 1 and an upper frame 2, respectively, generally made of metal and of stamped, shaped, sectioned or tubular elements. include. The back and bottom receiving surfaces or support surfaces are metal grids 3 fixed to the crossbars 5.6.
, 4. Each rigid system grid-crossbar member is laterally attached to the upper and lower respective frames by springs 7!8, which springs are hooked on the one hand to the respective frame members 5, 6 and on the other hand to the respective frame members. It is fixed in the holes provided in 1 and 2. Of course, the frame and lattice can be covered with, for example, plastic foam, fabric, or other cladding material covering said foam to constitute the finished seat.

In the seat according to the invention, the rigid metal grid forming each of the bottom and back of the seat and suspended from each frame is formed of transverse wires which themselves have the required elasticity and are fixed to said frame. Replaced by net. In FIG. 2 there is shown an elastic net 10 attached to the upper frame 11 of the seat according to the invention and forming its back. metal wire 1
Consists of 2. Each wire has an elastically permanently deformed portion 13;
In this embodiment, it is formed at the center of the wire. This wire consists of iron wire or preferably of normal or tempered steel (eg according to German standard DIN 2076).

The deformation provided in each wire is preferably in one plane, more particularly in the plane of the net, i.e. the geometry of the wire is as shown in FIG. This straight part is connected to other parts of the wire by a straight part shifted parallel to the other parts and two slanted parts (hereinafter referred to as "packet shape"). The wire may have other shapes, such as a serration shape where a relatively small pitch is preferred, or a spring shape where a relatively flat pitch (not shown) is preferred. One or several such deformations can be provided.

The transverse wires 12 are fixed at their ends to the transverse arms of a support element 14, which in this example is U-shaped.

Support element 1 supporting a stretchable or elastic net 10
4 is attached to the frame by clips 15 that are clamped onto the tubes that make up the frame. Figures 6 and 7 show two variations of these clips.
5 + 15', these are made of spring steel, plastic materials, etc.

In order to maintain the distance between the wires 12 forming the elastic net 10, spacing elements 16 are arranged in the plane of the net perpendicular to said wires, these elements having transverse grooves provided on these elements at regular intervals. Slide through the hole. These spacing elements 16 are made, for example, of polypropylene wire.

As can best be seen in the cross-section of FIG. 3, on the one hand, the deformation 13 formed in the central part of the wire 12 is entirely in the plane of the net, and on the other hand, the support element 14 of the net is attached to the tubular frame 11 by means of clips 15. Fixed. The cross-section of FIG. 4 shows the wire 12 being deformed under the action of the pressure indicated by the arrow V, for example when it is pressed against the back side of the user or the back of the seat.

Finally, FIG. 5 shows the elastically deformable portion 130 of the wire 120 in more detail. The position of the wire 12 before the net is assembled to the frame is shown by a solid line.

The relationship between the size of the inclined section 13' and the offset straight section 13' of the kerato-shaped deformation section is varied according to the desired elastic effect.The shape of the deformation section 13 in the rest position of the wire 12 is shown in dashed lines. , the elastic net is fixed to the frame and the support arms 14 are slightly further apart from each other, the shape of said deformed portion 13 being shown in dashed lines when the wire 12 is subjected to a pressure felt perpendicular to the plane of the elastic net.

As in the case of conventional seats, the seat according to the invention described above with reference to the drawings can be covered with, for example, a plastic foam, a fabric wrapping said foam or other materials to construct the finished seat.

The advantages of the seat according to the invention compared to known seats are that it is more comfortable to sit on and that the elastic net is laterally supported by a rigid grid due to the fact that the elastic net is deployed on at least a part of the supporting surface. It has better elastic properties than other materials. Furthermore, it is possible to provide deformations of different shapes and to provide them in different positions of the elastic net, so that the seat according to the invention can be adapted, for example, to the intended cladding of the seat (the shape of the particular padding and its Depending on the type of vehicle in which the seat is installed (utility, recreational or sports vehicle, etc.), as well as the weight of the user, the characteristics of the vehicle's suspension system, etc., different distributed elastic properties can be provided. can.

Furthermore, the attachment of the elastic net to the frame by ordinary clips simplifies manufacture, on the one hand, since no holes need to be made in the frame, and on the other hand, the seat can be divided into individual parts, making final assembly easier. It can be easily done.

Finally, by eliminating the typically 8 coil springs commonly used to suspend the bottom and back of known seats, and by using simple coil lips (e.g. 6), the seat according to the invention is Significant weight advantages are obtained.

[Brief explanation of the drawing]

1 is a perspective view of a seat with a known type of suspension; FIG. 2 is a perspective view of an embodiment of a seat with a suspension according to the invention; and FIG. 4 and 5 are cross-sectional views of the net forming the back of the seat; FIGS. 7 is a perspective view of two embodiments of a device for coupling wire netting to a frame; FIG. Symbols in the drawings: 1: Lower frame, 2: Upper frame, 3, 4: Metal grid, 5, 6: Horizontal bar member,
7゜8...Spring, 10...Elastic net, 11...
Upper frame, 12... Metal wire, 13... Permanently deformed elastic part, 13'... Slanted part, 13"... Straight part, 14... Support element, 15, 15'... Clip , shows (3 other people) Φ b- b- 152=

Claims (1)

[Scope of Claims] 1) The coffin includes a lower frame and an upper frame to which supporting surfaces are fixed, forming a bottom and a back, respectively, and at least one supporting surface is formed by an elastic net formed of laterally arranged wires. and each wire includes at least one permanently elastically deformable portion having the shape of a bracket located in the plane of the net. 2) A seat according to claim 4, characterized in that the permanently elastically deformable portion is located in the central portion of each wire. 3) The seat of claim 1, wherein each wire includes a plurality of permanently elastically deformed portions. 4) The seat according to any one of the preceding claims, characterized in that the transverse wire is made of metal, preferably made of iron or steel. 5) The transverse wire is made of metal, preferably made of iron or steel. A seat according to any one of the preceding claims, characterized in that both ends thereof are fixed. 6) Seat according to claim 5, characterized in that the crossbar members are fastened to each transverse part of the frame by removable fastening devices. 7) Seat according to claim 6, characterized in that the fixing device is a clip cooperating with the transverse bar member on one part and clamping the transverse part of the frame on the other part. 8) Any of the preceding claims, characterized in that the transverse wires of one net are connected between them by at least one spacing element arranged in the plane of the net perpendicular to said wires. or the seat described in paragraph 1. 9) A patent characterized in that the spacing element is a wire member made of plastic material, said wire member having transverse holes drilled equidistantly from each other, through which holes the transverse wires of the net pass. The seat according to claim 8.