DE1064220B - Suspension for backrests on chairs, preferably on office chairs - Google Patents

Description

GERMAN

The invention relates to a chair, in particular an office chair with a rotatably mounted seat plate, in which the backrest on a hairpin-shaped, attached under the seat plate and bent upwards, resilient wire is arranged so that the two ends of the hairpin-shaped Wire under the seat plate each in a loop perpendicular to the seat plate and on the rear part of the Seat plate are attached, with the loops slidably supported against the seat plate, according to patent 970295.

In order to pre-set or pre-tension such a suspension, it is proposed according to the invention, assign an adjustable support to the part of the wire located under the seat plate.

Although there are backrest suspensions already known in which to preload the suspension the legs of the loop-like wire spring an adjusting device is provided.

In contrast, in the further development of the suspension according to the main patent 970 295, the support is of the part of the wire located under the seat plate is designed to be adjustable. This creates a allows particularly fine adjustment of the suspension with a simple structure; the setting requires also little effort.

A support that can be adjusted by means of a threaded spindle and engages the wire spring can be used as a support, for example Serve wedge. It is advantageous if the actuator for rotating the threaded spindle in the area the front edge of the seat plate is arranged.

In the drawing, two exemplary embodiments of the subject matter of the invention are shown on an office chair.

Fig. 1 shows a side view of the backrest suspension with between the support of the seat plate and adjustable wedge arranged on the wire loops;

Fig. 2 shows a side view of the backrest suspension with one arranged on the limit stop Adjustable wedge.

On the column 1 and under the seat plate 7 , the cross-sectionally U-shaped support 2 is attached, the downward-facing legs 2 a two holes for receiving the end pin 3 a of the hairpin-shaped wire 3 c, 3 b, 3d carrying the backrest 5 , 3e .

According to Fig. 1, a wedge 8 which can be adjusted by means of the threaded spindle 4 and engages the wire part 3 b serves as a support, the actuator 9 of which is arranged for rotating the threaded spindle 4 in the region of the front edge of the seat plate.

According to Fig. 2, the lower arches of the wire part 3 c are supported on the wedge 8 , while the actuator 9 for turning the threaded spindle 4 in the area

Suspension for backrests on chairs,
preferably on office chairs

Addition to patent 970 295

Applicant:

Albert Spieth,
Esslingen / Neckar-Obereßlingen,
Plochinger Str. 156,
and Rudolf Spieth,
Eßlingen / Neckar-Oberhof, 10

Albert Spieth, Eßlingen / Neckar-Obereßlingen,
has been named as the inventor

the rear edge of the seat plate is provided on the U-shaped limit stop 6 a, 6 b, 6 c .

Depending on the arrangement of the adjusting wedge 8 , the size of the spring preload and the pivoting of the backrest can be influenced.

Claims (1)

Patent claims: 1. Chair, especially office chair with a rotatably mounted seat plate, in which the backrest is arranged on a hairpin-like shaped, attached under the seat plate and bent upward, resilient wire, so that the two ends of the hairpin-like shaped wire under the seat plate each in one for Seat plate vertical loop are guided and attached to the rear part of the seat plate, the loops are slidably supported against the seat plate, according to Patent 970 295, characterized in that the part of the seat plate (2, 7) located under the seat plate 909 609/13 +