JPH0236085B2 - - 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 for 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, particularly for vehicles, and include a backrest and a seat respectively attached to an upper frame and a lower frame by elastic devices, such as coil springs, the whole being optionally provided with cushioning material and a cover. By attaching it, it is adapted to its intended use.

Generally, the backrest part and the seat part suspended from the frame are formed of a rigid metal grid.
However, the comfort provided by these types of seats is not always satisfactory, especially when used as a car seat where the user frequently and rapidly sits down and leaves the seat. . Furthermore, the suspension springs of the backrest and the seat act very strongly, their damping properties act slowly and the suspension is relaxed. Finally, in this type of seat it is necessary to provide a frame with sufficient rigidity and thickness to compensate for the weakness caused by the holes provided for the suspension springs.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a seat that is relatively rigid, has an appropriate elasticity depending on the vehicle type, has a simple structure, and is easy to assemble. The goal is to provide the following.

That is, according to the invention, such a seat comprises an upper frame and a U-shaped support element to which support surfaces forming each of the backrest part and the seat part are fixed via a U-shaped support element comprising two side arms facing each other; comprising a lower frame, at least one support surface being constituted by an elastic net formed of a plurality of wires arranged laterally parallel to each other, each wire lying in a plane formed by the elastic net; In a configuration including at least one elastically permanently deformed portion,
the elastically permanently deformable portion is disposed within the plane;
It is characterized in that it consists of a straight section parallel to and spaced apart from the straight section of the wire, and two inclined sections connecting the straight section to the straight section of the wire at both ends.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a known seat, particularly for vehicles, which seat is generally made of metal and made of extruded material.
It comprises two upper frames 1 and a lower frame 2 which are profiles, sections or tube-like elements. The receiving or supporting surfaces of the backrest and the seat are constituted by metal grids 3, 4 fixed to U-shaped support elements 5, 6. Each such rigid metal grid is laterally attached to the upper and lower respective frames by springs 7,8. A particular method of attachment is that one of these springs is latched to the side arms of the support elements 5, 6 constituting the frame of the rigid metal lattice, and the other is latched to the respective frame 1, 2. It is fixed in a hole drilled in the hole. Of course, the frame and rigid system lattice are not used as is, but can be used as seats, for example with plastic foam, fabric, or other exterior coverings over the foam.

In the seat according to the invention, the rigid metal lattice forming each of the backrest part and the seat part 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 the backrest thereof. This net 10
consists of a plurality of wires 12, preferably made of metal, arranged laterally, practically parallel to each other. Each wire has an elastically permanently deformed portion 13, which in this example is formed in the central part of the wire. This wire consists of iron wire or preferably of normal or tempered steel (for example according to the German Industrial Standard: DIN 2076).

The elastically permanently deformed portion 13 provided on each wire is preferably located in the plane of the elastic net 10, and its geometrical shape is similar to that of the wire 12 as shown in FIGS. 2 and 5. It consists of a straight section 13'' spaced parallel to the straight section of the wire and two inclined sections 13' connecting it at both ends to the straight section of the wire. converge symmetrically toward each end of the straight section (hereinafter,
This is called the "bucket shape").

The wire can be provided with elastically permanently deformed portions at one or more locations along its length.

Wires 12 arranged laterally parallel to each other
are fixed at their ends to the lateral arms 14a, 14b of the U-shaped support element 14, respectively, in this example as well. Said U-shaped support element 14 supports a stretchable or elastic elastic net 10
is attached by a clip 15 held between the side portions of the frames 11 and 22, which are preferably made of pipe, and this clip 15 can be seen in the cross section shown in FIGS. 3 and 4. As you can see,
lateral arms 14a of said support element in one part;
14b, and the other part holds the side parts of the frame as described above, and unlike the known example shown in FIG. 1, elastic members such as springs 7 and 8 are used. It should be noted that there is no Details of such a clip are shown in FIG. 6, and a variation thereof is shown at 15' in FIG. This modification differs greatly from the clip 15 shown in this embodiment in that the side arm 14a is held from the opposite side. Additionally, these clips are made of spring steel, plastic material, and the like.

In order for the wires 12 to form an elastic net 10, spacing elements 16 are arranged which are arranged perpendicularly to the wires in the plane formed by the wires which are arranged laterally parallel to each other. The elements are wire members made of a plastic material, preferably polypropylene, having a plurality of regularly spaced transverse holes through which the wire 12 extends; By this, the distance between adjacent wires is maintained regularly. Furthermore, in the embodiment shown in FIGS. 2 to 5, the spacing elements 16 are arranged vertically on both sides of the elastically permanently deformable portion 13, so that the entire net has a certain degree of plane rigidity. However, the central portion where the elastic permanent deformation portions 13 are vertically arranged still has elasticity, and at the same time gives the entire net lateral flexibility, providing a stiff and comfortable cushioning to the user. It is the source of the effect.

FIG. 4 shows the lateral flexibility that is the source of the above-mentioned comfortable cushioning effect. When the user leans against the backrest, pressure is applied in the direction of arrow V, and the wire 12 moves as shown in the figure. It is easy to understand that the whole body bends in a bow shape.

FIG. 5 shows in more detail the deflection state of the elastic permanently deformed portion 13 compared with the state in which no pressure is applied, as seen from a plane parallel to the elastic net 10, and shows the wire 12 and the side arm 14a shown in solid lines. ,1
4b shows the state in which the elastic net is not under pressure before being attached to the frame, the broken line indicates the state in which the elastic net is attached to the frame but without pressure, and the state in which it is attached to the frame and is under pressure is indicated by one point. Indicated by a chain line. In each of these states, the elastically permanently deformed portion 13, that is, the bucket is attached to the frame, so that the end of the wire is slightly pulled left and right, so that it is slightly lifted together with the wire near the bucket, exhibiting an elastic effect. .
Next, when the user takes a seat and pressure is applied to the plane of the backrest, the bucket is further lifted significantly upwards to the position shown by the dash-dotted line. However, what must be noted here is that the Bucket does not directly contact the user's back with its straight part 13'' to exert the strongest elastic repulsion force, but rather with the straight part 13'' on the side where the elastic repulsion force is not so strong. Because the directional surface acts, even though the elastic net as a whole exhibits considerable rigidity, it flexibly contacts the user's back, especially the back muscles, creating an extremely natural sense of unity, allowing the user to sit for long periods of time. It has the effect of not causing any localized pain even when wearing it, and in particular, compared to the known structure shown in Fig. 1, it has the effect of providing a much more comfortable feeling, that is, no feeling of fatigue. Of course, in order to set the elastic effect of the bucket to an appropriate level, it is sufficient to set the inclined portion 13' and the straight portion 13'' to an appropriate inclination or length, and this setting depends on the vehicle model to which it is installed. It is obvious that it can be changed accordingly.

As in the case of a conventional seat, for putting it into use, it is filled with, for example, plastic foam and then covered with a cloth or resin sheet in the same way as known seats.

Compared to known seats, the seat according to the invention allows bucket belts with different elastic effects to be provided at various positions of the elastic net, so that different distributed elasticity can be obtained depending on the weight of the user, the characteristics of the suspension system of the vehicle, etc. It is possible to give characteristics.

Furthermore, attaching the elastic net to the frame by ordinary clips does not require drilling holes in the frame, which is not only easy to simplify the manufacturing process, but also allows the seat to be separated into individual parts. This has the advantage of making the final assembly easier.

In addition, although the known seat generally uses eight coil springs to suspend a metal grid, the use of the clip according to the present invention is extremely advantageous because it is easy to install and is also light in weight. It is.

[Brief explanation of drawings]

1 is a perspective view of a seat with a suspension device of the known type; FIG. 2 is a perspective view, mainly of the backrest, of an embodiment of the seat with a suspension device according to the invention; FIG.
The figure is a cross-sectional view of the elastic net forming the backrest of the seat shown in Figure 2 in a non-pressure state, and Figure 4 shows the deflection state of the elastic net under pressure load (during use), similar to Figure 3. FIG. 5 is a plan view showing the deflection state of one elastic permanently deformed part (bucket) of the wires constituting the elastic net, and FIGS. FIG. Symbols in the figure: 1...Upper frame, 2...Lower frame, 3, 4...Metal grid, 5, 6...Support element, 7, 8...Spring, 10...Elastic net, 1
1... Upper frame, 22... Lower frame, 1
2... Wire, 13... Elastic permanent deformation part (bucket), 13'... Inclined part, 13... Straight part,
14...Support elements, 14a, 14b...Side arms, 15, 15'...Clips, 16...Spacing elements, respectively.

Claims (1)

[Claims] 1. Two side arms 14 whose supporting surfaces forming a backrest portion and a seating portion face each other.
Upper frame 11 and lower frame 22 fixed via a U-shaped support element 14 comprising a, 14b
comprising an elastic net 10 having at least one support surface formed by a plurality of wires 12 arranged laterally parallel to each other, each wire lying in a plane formed by the elastic net, and In the configuration including at least one elastically permanently deformable portion 13, the elastically permanently deformable portion 13 is disposed in the plane and includes a straight portion 13″ parallel to and spaced apart from the straight portion of the wire 12; 2 connected to the straight part of the wire at both ends
A seat characterized in that it consists of two inclined parts 13', 13'. 2. Seat according to claim 1, characterized in that the elastically permanently deformed part 13 is located in the central part of each wire 12. 3 Each wire 12 has a plurality of elastically permanently deformed parts 1
3. The seat according to claim 1 or 2, characterized in that the seat comprises: 3. 4. The seat according to any one of claims 1 to 3, wherein the wire 12 is made of metal such as iron or steel. 5. Seat according to any one of claims 1 to 4, characterized in that both ends of each wire 12 are fixed to the side arms 14a, 14b of the support element 14. 6 The side arms 14a, 14b are attached to the clips 15,
15' to each side portion of each of the frames 11, 22, and the clip 15 holds the side arm in one portion and the side portion of each frame in the other portion, respectively. The seat according to claim 5, characterized in that: 7. Claim 1, characterized in that the wires 12 are connected to form an elastic net 10 by spacing elements 16 arranged perpendicularly to the wires in the plane of the net. to 6th
Seats listed in any one of paragraphs. 8. The spacing element 16 is a wire member made of plastic material, said wire member having a plurality of transverse holes drilled at regular intervals, through which the wires 12 of the net pass. The seat according to claim 7.