DE102009012744A1 - Seat shell and method for its production - Google Patents

Abstract

Seat shell, in particular one-piece seat shell with a seating zone and a back zone, which has a bending along its bending axis in its transition region, wherein the bending axis (22) is arcuate, and seating with such a seat shell and method for producing the same.

Description

The The present invention relates to a seat pan having a seating zone and a back zone, in their transition area has a bend along the bending axis. Furthermore it concerns the invention, a chair with such a seat and a method for producing such a seat shell or a such seating.

From the prior art, for example the DE 43 16 057 , one-piece seat shells are known, which are formed of a molded wood panel with a veneer surface.

There especially with stackable seating chairs with chairs Unpadded seat shells should be used but should be the visible one Wood veneer surface a satisfactory quality without cracks or waves. To have a satisfactory visual quality To be able to reach the glued veneers be deformed only two-dimensionally in the mold. commercial Seating shells in sufficient quality therefore point in the transition area from the seat to the back zone one uniform cylinder jacket-shaped bend which corresponds to the two-dimensional deformability of the wood veneers.

A three-dimensional spatial deformation, for example Making a seat recess in the seating area is very limited possible. It must be either with unpleasant cracking due to strains transverse to the grain of the wood veneer or be reckoned with more expensive treatment methods.

For example, in the application DE 101 24 913 and their further education DE 10 2005 033 798 proposed to produce a three-dimensional bending deformable surface element made of wood or wood composite, are introduced into the grooves by means of scoring or rolling knife along the fiber direction preferably V-shaped grooves. These grooves divide the surface element into strips, so that a loosening of the cross-bond of the wood veneer arises.

One in the grooves introduced adhesive allowed during the Phase of the three - dimensional deformation a shear deformation of the Strip without the joints between the strips opening, causing a good visual quality of the wood veneer can be achieved can.

Around penetration of gases or liquids into the grooves In addition, on the surface element, a shear-deformable gas and liquid-tight pressure-resistant layer applied.

adversely However, in this process is that the treatment of the deformed Surface element is very expensive, causing the seat shells very expensive.

One Another disadvantage of the conventional seats (sets in their space-consuming stacking. Especially in a object style, For example, a hall seating in which a seating of a Space is only temporary, while the chairs stored at other times, it is advantageous if the chairs are stacked as space-saving as possible can be as low as possible in the storage condition To take up space.

Become the seat shells, however, only with the commercial uniform Cylinder-shaped bend between seat and back zone trained, in addition, in the back zone for better support of the human back a cross support (so-called Ackerbloomknick) formed This, in turn, adversely affects a stacking property the chairs off. Especially with an ideally shaped Cross support can not vertical stacking, but only a staggered stacking can be achieved so that at the conventionally made seat shells with a back support impossible is a compact and vertical stacking of the To reach chairs.

task The present invention is therefore a seat pan, in particular for a chair and a method of manufacturing to provide this, wherein the seat shell ergonomically shaped and is free of cracks and allows a space-saving stacking.

These Task is achieved by a seat according to claim 1 or a chair according to claim 10, and a method for manufacturing a seat according to claim 12 solved.

The The present invention is based on the idea of replacing one of Known prior art straight bending axis, with a cylinder jacket Bending between seating zone and back zone is achieved to use an arcuate (primary) bending axis.

there is, as a preferred embodiment shows, the Vertex of the arcuate bending axis oriented in such a way that when bent around the arcuate bending axis a back cavity is formed in the mold seat shell.

The Ends of the bow are oriented such that a positive arched seat arises.

There However, a positively curved seat not is absolutely desirable, as another preferred Embodiment shows the seat, preferably at the same time, around a secondary arranged longitudinally of the seating zone Bent bending axis, so that a seat recess is formed. This bend around the secondary bending axis also has the Advantage that stress or strain forces in the veneer be degraded, so that no cracking occurs.

Preferably the back cavity forms an opening upwards flattened cone sheath surface, which is an ergonomic makes correct prop of the back. Due to the formed back cavity and the pronounced Seat recess is also a space-saving stacking of chair shells possible.

A synchronous deformation along primary and secondary Bending axes also has the advantage that excessive Extensions of the cover veneers are avoided, so that no Cracking can occur.

Further Advantages and preferred embodiments are in the subclaims, the description and the figures defined.

in the Below, the present invention with reference to in the drawings illustrated embodiments explained in more detail become. The embodiments are purely exemplary nature and are not intended to limit the scope of the application. Same or similar components and elements will be in the following denoted by the same reference numerals.

The Figures show:

1 a schematic side view of a commercial seat according to the prior art;

2 : a side view of in 1 illustrated conventional seat in stacking;

3 a schematic perspective view of a preferred embodiment of a seat according to the invention after bending around a primary bending axis;

4 : a schematic side view of in 3 illustrated seat shell according to the invention;

5 : a schematic perspective view of the in 3 and

4 shown seat after bending around a secondary bending axis;

6 : a schematic side view of in 5 illustrated seat shell according to the invention; and

7 : a schematic side view of in 5 and 6 illustrated seat according to the invention in stacking.

The Side views shown in the figures have consistent Double lines and half in one half dashed double lines (hereinafter as continuous / dashed referred to). The continuous double lines be distinguished while a peripheral contour of the seat, while the continuous / dashed double lines a maximum show three-dimensional contour.

1 shows a schematic side view of a conventional seat 1 for a stackable chair. The seat shell 1 has a back zone 2 and a seating area 4 on. In the transition area 6 between seating area 4 and back zone 2 is a uniform cylindrical shell-shaped bend around a bending axis 8th educated. The bending axis runs 8th across the seat 1 and is currently educated.

back zone 2 and seating area 4 have a three-dimensional deformation, wherein a conventional method has been used for example by means of sliced veneers.

In the back zone 2 denotes the reference numeral 10 the edge contour of the seat pan 1 while reference number 12 denotes the maximum training of the dorsal cavity. In the seating area 4 denotes the reference numeral 14 the edge contour of the seat pan 1 while the reference number 16 describes the contour of a maximum depth of the seat recess.

Will this conventional seat shell 1 on another conventional seat 1' stacked, as in 2 shown, it can be seen that the straight, cylindrical bend 6 and the resulting vertical contour of the back shell 2 to a touch of the stacked seats 1 . 1' in the area 18 leads. The area 18 thus limits the stacking and determines the compactness of the stack height h, since the seats can not slip into each other. In particular, it is an additional deformation which is pleasant for the human back, in the form of a back support 20 provided, which supports the human back optimally (so-called Ackerbloomknick), the stack height h is further increased.

Therefore, it is proposed according to the invention and in 3 illustrated, between back zone 2 and seating area 4 no bending around a straight bend axis 8th train, but the seat 1 around an arcuate bending axis 22 to bend so that back zone 2 and seating area 4 be formed.

In this case, the arcuate bending axis 22 a vertex 24 and bow ends 26 . 28 on. Preferably, the bow ends 26 . 28 formed symmetrically. However, it is also conceivable, different bow ends 26 . 28 to use.

When bent around the arcuate bending axis 22 is preferably the vertex 24 arranged such that a back cavity 30 is trained. This is in particular in the side view according to 4 clear to see. The in the transition area between the back zone 2 and seating area 4 trained bend 6 takes place according to the invention around the apex 24 , the back cavity 30 forms, and around bow ends 26 . 28 , whereby a groove or gutter 32 in the edge area of the transition area 6 between back zone 2 and seating area 4 is formed.

At a bend around the arcuate bending axis 22 arises at the same time due to the orientation of the bow ends 26 . 28 a positively curved seating area 4 , in the 3 through the with 34 marked arrow and in 4 through the with 34 marked contour is designated.

As a positively curved seating area 34 can be uncomfortable for a person, provides an advantageous development of the invention, the seat 1 in addition to the primary arcuate bending axis 22 around a secondary, preferably longitudinal to the seating area 4 extending bending axis 36 to bend. This bend can be provided either synchronously with the primary bend or in a separate bending step.

Due to the bend around the secondary bending axis 36 arises, how 5 can be seen, a seat recess 38 , In addition, the spatial schematic representation of the seat according to the invention 1 according to 5 that due to the bend around the arcuate primary bending axis 22 a pronounced back cavity 30 which flattened towards the top (see reference numeral 40 ) is formed.

The contour of the seat according to the invention is in 6 shown, wherein the 6 a schematic side view of the seat according to the invention 1 shows. As can be seen there, the bend leads around the arcuate bending axis 22 with her crown 24 and the bow ends 26 . 28 to a depression that the back cavity 30 forms. The bow ends 26 . 28 and their spatial orientation leads to the peripheral groove 32 in the transition area 6 between back zone 2 and seating area 4 , The edge contour 10 the back zone 2 is essentially straight formed, and the back cavity 30 flattened in an upper area 40 so that the back cavity 30 having a conical shell-shaped formation. The seating area 4 has an elevated contour at the edge 14 due to the secondary bending around the secondary bending axis 36 a recessed seat recess 38 is trained.

Because the back cavity 30 Although pronounced, but the lateral contour 10 the back zone parallel to the back axis 42 runs, the seats can be pushed together to save space.

A stack of two seat shells according to the invention 1 . 1' is in 7 shown. Because of the back axis 42 parallel lateral contour 10 the back zone 2 , is the contact area 18 , which determines the stack height h, much lower than in the conventional seat shells (see. 2 ).

Due to the bending of the seat shell 1 around the primary arcuate bending axis 22 and the preferably synchronous bending around the secondary bending axis 36 Both a cone-shaped back cavity and an ergonomically designed seat recess are formed in the seat shell, without causing excessive stretching of the veneer. As a result, no cracks occur, even if common veneers are used without pretreatment. As a result, a qualitatively flawless timber surface of the shells is advantageously ensured.

1

seat

2

back zone

4

seat zone

6

Transition area between seating zone 4 and back zone 2

8th

just Bending axis for uniform cylinder jacket-shaped bend

10

edge contour of the seat shell 1 in back zone 2 , while

12

maximum Contour of a back cavity training

14

edge contour of the seat shell 1 in seating area 4

16

maximum Contour of a seat recess training

18

contact area

20

back support

22

arcuate bending axis

26 28

arc ends

30

back recess

32

fillet

34

positive arched seating area

36

secondary bending axis

38

seat recess

40

Upper area of the back cavity 30

42

ridge axis

H

stack height

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 4316057 [0002]
• - DE 10124913 [0005]
• - DE 102005033798 [0005]

Claims (20)

Seat shell, in particular molded wooden seat shell, with a seating zone and a back zone, which in its transitional area has a bend along a bending axis, characterized in that the bending axis (FIG. 22 ) is arcuate. Seat shell according to claim 1, wherein the bending axis ( 22 ) runs transversely to the seat. Seat shell according to claim 1 or 2, wherein the arcuate Bending axis has a vertex that is oriented such that the bending of the seat around the bending axis a back recess the back zone of the seat shell forms. A seat pan according to claim 3, wherein the back cavity as a substantially upwardly opening, flatter expectant Konusmantelteilfäche is formed. Seat according to one of the preceding claims, wherein the arcuate bending axis has a beginning of the arc and having an arc end oriented such that the bend the seat shell around the bending axis a positive arched Seat zone provides. A seat pan according to any one of the preceding claims, wherein the seat pan has a secondary bend about a secondary bending axis ( 36 ), which preferably runs longitudinally to the seat shell. Seat according to claim 6, wherein the secondary Bending axis is arranged along the seating zone, and such oriented is that the bend around the secondary bending axis forms a seat recess of the seating area. Seat according to one of the preceding claims, wherein the seat made of molded wood, in particular molded plywood is. Seat according to one of the preceding claims, wherein the seat shell a wood veneer surface, in particular made of beech wood veneer. Seating furniture, characterized by a seat shell according to one of claims 1 to 9. Seating furniture according to claim 10, wherein the seating furniture a shell chair, in particular a stackable shell chair, is. Method for producing a seat shell, in particular a shaped wooden seat shell, wherein the seat a seat zone and includes a back zone that is in its transitional area have a bend, characterized in that the seat pan around an arcuate primary bending axis is bent to form the seating zone and the back zone. The method of claim 12, wherein the bending axis runs transversely to the seat. The method of claim 12 or 13, wherein the vertex the arcuate bending axis is oriented such that the bending of the seat around the bending axis the back recess formed. Method according to one of claims 12 to 14, wherein the beginning of the sheet and the end of the sheet are oriented in such a way that the bending of the seat around the bending axis is a positive vaulted seating area forms. Method according to one of claims 12 to 15, the seat pan further being a secondary bending axis is bent, which preferably extends longitudinally to the seat. The method of claim 16, wherein the secondary Bending axis is oriented so that the bending of the seat around the secondary bending axis a seat recess of the seating area formed. A method according to claim 16 or 17, wherein the seat pan simultaneously around the primary and secondary bending axes is bent. Method according to one of the preceding claims, with a seat pan according to one of claims 1 to 9 is produced. Method according to one of the preceding claims with a seating furniture according to claim 10 or 11 produced becomes.