DE1085655B - Mouth-shaped bent flat spring for upholstery of seating furniture - Google Patents

Description

GERMAN

The invention relates to a mouth-shaped bent flat spring made of an undulating or zigzag shape coiled spring wire, the horizontal legs of which are arranged resiliently against each other, for seat and Back cushions of seating furniture or the like.

It is known to use a spring body for vehicle seats from several rows of parallel, wavy or zigzag coiled spring strips to build. Here, the legs of the turns lie in a common plane; while processing this spring strip to a seat, the spring strips are each twisted in a leg axis, so that bends are created that give yielding, mouth-shaped loops and supports. That means However, a very high material stress and very often leads to breakage at the bending point, which makes the entire suspension worthless.

The invention extends to the formation of mouth-shaped bent springs to avoid torsional stress at the bending point. Rather, the spring wire should only open Bending are stressed. This special design also achieves that connecting brackets are unnecessary if other spring strips, in particular those for the seat or backrest surface are to be attached.

According to the invention this is achieved in that the spring wire loop located at the bending point is bent in its center perpendicular to the plane formed by the stretched spring.

This makes it possible in a simple manner to use the flat springs for a wide variety of upholstery shapes to bend into a mouth shape and to use. It can be used in the vertex loops further flat spring strips lying transversely to the flat spring can be hooked in without clipping requirement. This achieves simple assembly and considerable cost savings.

The subject matter of the invention is shown in the drawing in several exemplary embodiments. It shows

Fig. 1 a known zigzag spring in plan view and

Fig. 2 shows a section through the known zigzag spring, which is bent in a known manner to form a mouth,

Fig. 3 a section AB of Fig. 4,

Fig. 4 is a partial plan view of a backrest suspension with shoulder bulges,

Fig. 5 is a plan view of a single balancer of a backrest suspension,

Fig. 6 a section CD of Fig. 5,

Fig. 7 a section EF of Fig. 8 and

Fig. 8 is a top view of a seat suspension.

Mouth-shaped

bent flat spring
for upholstery of seating furniture

Applicant:

Plate & Co.,
Wuppertal-Voliwinkel, Rembrandtstrasse. 14th

According to Fig. 1, a spring wire 1 is in the usual way continuously at intervals to the arches 2 to 13 back. and bent, which are connected to one another by the legs 14, which can be of different lengths are. The loops are open on one side; they are in one plane.

To produce the shown in Fig. 2, known spring mouth 15, the zigzag spring is around a the leg 14 bent against one another. This leg 14 is already twisted when the mouth is generated. When the mouth is further loaded in the direction of the arrows 16, this leg 14 opens Torsion stressed.

In contrast, if you consider the new version according to Figs. 3 to 8, it follows that the on the The bending point located spring wire loop 17 is bent in its center, perpendicular to the common level formed by the remaining loops. After this turn is made, will then around this angled loop part the zigzag spring is bent in a mouth shape.

Such a zigzag spring that is bent together in a mouth shape no longer opens at its point of bend Torsion, but only subjected to bending, as in particular from the sections Fig. 3, 6 and 7 emerges.

These mouth-shaped bent zigzag springs can be used for a wide variety of upholstery purposes. In the event that a suspension for a backrest provided with shoulder bulges is produced should, one connects the leg ends 19 of the mouth with a frame 20 in a known manner; the ends 18 of the other legs are connected to one another by a flat iron 21. In the top loop 17 becomes another, transverse to the mouth-shaped ones

009 567/80

Zigzag springs lying zigzag spring 23 hung, without this any interlocking between Crown loop 17 and zigzag spring 23 is required.

In the case of the backrest spring arrangement according to FIGS. 5 and 6, the apex loop 22 can directly the eyelet 25 bent at the end of an elongated zigzag spring 24 are suspended. The one End 19 of the zigzag spring mules 15 is attached in a known manner to a frame while the other end 18 floats freely. The end 26 of the elongated zigzag spring 24 is also on the frame attached.

From Figs. 7 and 8 it can be seen that the invention is not limited to the train a long zigzag spring to produce only a single bending point, but it can, as in particular As can be seen from Fig. 7, such bending points are produced on the loops 27, 28 and 29. Such Shapes of zigzag springs are particularly suitable for seat suspension. The multiple bent Springs are fastened with their ends 30 in the usual way to a subframe 31 by means of clamps ; Likewise, an upper frame 32 is provided to which the zigzag springs are attached by brackets 33 are.

Claims (1)

Claim: Mouth-shaped bent flat spring made of wavy or zigzag-shaped coiled spring wire, the legs of which are arranged resiliently against one another, for seat and backrest cushions of seating furniture or the like, characterized in that the spring wire loop (17, 22, 27, 28 or 29) is bent in its center perpendicular to the plane formed by the elongated spring (2 to 13). Considered publications:
German Patent No. 912,259;
British Patent No. 619 430. 1 sheet of drawings © 009 567/80 7.60