EP0006880A1

EP0006880A1 - Dismountable furniture

Info

Publication number: EP0006880A1
Application number: EP19780900066
Authority: EP
Inventors: Johann Munz; Alfred SCHÜTZ
Original assignee: Team Form AG
Current assignee: Team Form AG
Priority date: 1977-07-29
Filing date: 1979-02-27
Publication date: 1980-01-23
Also published as: CH619126A5; WO1979000074A1

Abstract

On cherche a rendre possible differentes formes d'execution en systeme modulaire pour la creation d'un programme de meubles a partir d'un meuble, par exemple a partir d'une chaise, en permettant de combiner des sieges et/ou des dossiers differents avec des pieds de longueurs differentes. Dans ce but les cadres (11), reliant entre eux les pieds. (10), sont faits en tubes metalliques et possedent des extremites elargies en trompette formees de facon complementaire a la forme du trace du pied de maniere telle qu'elles entourent une partie du pourtour du pied, ces cadres etant relies au pied de facon demontable au moyen d'une vis (17), s'etendant dans le prolongement du cadre et traversant le pied de part en part. L'ecrou correspondant (18) est, de preference, soude dans le cadre (11) tandis que la tete de la vis se trouve dans une encoche metallique (15), qui elle se trouve dans une gorge transversale (14) du pied, qui est de preference en bois, ladite encoche etant formee de maniere telle qu'elle ne depasse pas le pourtour du pied.We seek to make possible different forms of execution in modular system for the creation of a furniture program from a piece of furniture, for example from a chair, by making it possible to combine seats and / or different backrests with feet of different lengths. For this purpose the frames (11), connecting the feet together. (10), are made of metal tubes and have enlarged trumpet ends formed in a way complementary to the shape of the footprint in such a way that they surround part of the circumference of the foot, these frames being detachably connected to the foot by means of a screw (17), extending in the extension of the frame and crossing the foot right through. The corresponding nut (18) is preferably welded in the frame (11) while the head of the screw is in a metal notch (15), which it is in a transverse groove (14) of the foot, which is preferably made of wood, said notch being formed in such a way that it does not exceed the circumference of the foot.

Description

Detachable furniture

The invention relates to a detachably assembled piece of furniture, with legs joined together by frames and at least one flat element fastened to the legs or the frames.

The aim of the present invention is to provide a releasably assembled piece of furniture which consists of a limited number of elements, each of which has the same function as the individual element, such as a chair seat or the legs in different shapes and sizes, and with the modular principle other elements can be put together to form a modified piece of furniture. In this way, for example, chairs with different leg heights, with different seat parts or differently designed backrests can be produced. The creation of such a piece of furniture considerably simplifies the storage and transport problem, since the piece of furniture takes up very little space in the disassembled state. The furniture should combine high stability with an aesthetically pleasing shape and be assembled in a few simple steps.

To solve the above-mentioned problems, the detachably assembled piece of furniture of the type mentioned at the outset is characterized in that the legs are min

' at least at the attachment points for the frames have a curved outer surface and that the frames consist of metal tube, which is expanded in a trumpet-shaped manner at its ends connected to one leg and is complementary to the outline shape of the respective leg in such a way that the end edge of the trumpet-shaped expanded tube is one Part of the leg circumference encompasses that the frame and the leg, the axes of which intersect, are connected to one another by means of a screw extending through the leg in the longitudinal direction of the frame, and that the planar elements are likewise connected to the legs by means of screws extending through the legs or frames Legs or the frames are attached.

The planar element can preferably be designed as a chair seat or as a backrest or as a table top. These planar elements can be connected to legs of different designs in cross-section and / or length, which results in a piece of furniture that is modified in terms of shape and function. In a preferred embodiment, four legs are connected to one another by metal tubes which extend diagonally between the legs and form a one-piece cross frame. With these metal tubes forming a cross frame, a chair seat is then preferably used Screws extending straight through the metal tubes and screwed into the underside of the seat. The legs are preferably made of wood, with each leg expediently having a groove extending perpendicularly to the bore at the end of a through hole for a screw extending transversely through the leg for receiving a metallic support part, the support part located in this groove on the outside with the circumferential contour of the leg is flush and receives the head of the screw in a recess, which connects the leg with a frame or with a flat element. The screw extending across the leg is expediently screwed into a screw nut, preferably welded inside the metal tube forming the frame, or if the leg is connected to a planar element, this screw is in a threaded sleeve countersunk on the edge of a planar element screwed in.

The combination of wood and metal results in a high stability for a detachably assembled piece of furniture using metal parts with a relatively small cross-section, so that these metal parts take a back seat in terms of the aesthetic effect of the furniture. By the trumpet-shaped at the end Frames that nestle against the shape of the legs achieve absolute angular stability of the legs.

Further details and advantages of the invention result from the following description and the drawings, in which various embodiments of the subject matter of the invention are shown purely by way of example. Show it:

Figure 1 in a diagrammatic and exploded view, the individual parts of a chair with armrests.

FIG. 2 the chair according to FIG. 1 in the assembled state;

3 shows a cross section through the connection between frame and chair leg on a larger scale.

Fig. 4a and b front view and side view of another chair shape with a bow back;

5 shows the connection of the bow back to the chair leg in the chair according to FIG. 4 on a larger scale;

Fig. 6 a and b front view and side view of another chair shape with normal backrest;

Fig. 7a and b front and side view of an armchair with two pairs of legs each connected by an armrest part; 8 is a side view of a table, the legs of which are connected by metal tube frames;

9 shows a cross section through the connection of a leg with two frames of adjacent chairs of row seating arranged at the same height on a larger scale.

10 shows a vertical section through the frame end according to line I-I in FIG. 9;

11 shows a cross section through the frame according to line II-II in FIG. 10.

1 and 2 has four legs 10 which are round in cross section and made of wood and which are connected to one another by metal tubes which extend diagonally between the legs and form an integral cross frame 11. The four metal tube ends 12 of the cross frame 11 are expanded in a trumpet shape and are complementary to the outline shape of the leg 10 such that the end edge of the trumpet-shaped expanded tube encompasses part of the leg circumference, as can be clearly seen in FIGS. 2 and 3 in the assembled chair. The central axes of the leg and the metal tube intersect and, in the extension of the central axis of the metal tube, a through bore 13 extends transversely through the leg 10 and opens on the outside of the leg into a groove 14 extending at right angles to the bore for receiving a metallic support part 15. This. Backing part 15 is designed to be flush with the outer contour of the leg, ie it is rounded and has a cylindrical recess 16 for receiving the head of a ver Binding screw 17, which extends through the through hole 13 across the leg 10 and is screwed into a welded nut 18 at the tube end of the cross frame 11. Since the legs 10 are made of wood, the support part 15 is required to the

To be able to tighten screw 17 firmly, whereby the base part and screw do not protrude beyond the outer contour of the leg.

The same principle of connection is also used where a flat element in the form of the backrest 19 in FIG. 1 is to be fastened directly to a leg 10. In this case, the side edge 20 of the backrest 19 has a countersunk threaded sleeve 21, into which a screw 17 is screwed which extends transversely through the leg 10.

On the cross frame 11, a chair seat 22 is fastened by means of screws 23 which extend transversely through the metal tubes of the frame and are screwed into the underside of the chair seat, spacer bushes 24 being arranged between the frame and the chair seat, through which the screws extend.

The upper ends of each of a front and rear leg 10 of the chair are connected by an armrest 25 which is fastened by means of screws 26 to the front end of the leg. Simultaneously with a screw 26 can be a chair Numbering 27 are attached to the end of the armrest by means of a washer 28.

In order to connect similar chairs for row seating, in the chair according to FIG. 1 a coupling consisting of a wire loop 30 with the wire ends is inserted into holes 31 in the cross frame 11 in the cross frame 11, namely the wire loop 30 is on the one Side of the chair configured differently than a wire loop 32 suspended on the opposite side of the chair, in such a way that the wire loop 30 hooks onto the wire loop 32 of an adjacent chair by interlocking.

Fig. 3 shows in cross section and on a larger scale the connection between a leg 10 and the frame 11, wherein here a stamped and provided on the outer circumference with rag screw nut 18 is fixed by spot welding to the tube end of the frame 11.

The same principle, described with reference to FIGS. 1 to 3, of connecting the chair legs 10 to a cross frame 11 is also applied to the chair shown in FIGS. 4a and 4b. In contrast to the chair shown in FIGS. 1 and 2, however, a semicircular arch back 40, which is made of wood and has a circular cross section, is screwed to the upper ends of the rear chair legs. Fig. 5 represents a vertical section through the arch back 40 at the connection point with the chair leg 10 on a larger scale, in which figure it can be seen that in the same way as described above, a connecting screw 17 extends transversely through the arch back 40, the screw head countersinking is arranged in a support part 15. The screw 17 is screwed into a threaded bushing 41 sunk at the upper end of the chair leg 10, a concave spacer 42 on the upper side, on which the archrest rests, being arranged between the chair leg and the arch rest.

A modified chair shape shown in FIGS. 6a and 6b in front view and side view has a differently designed backrest 45 which is fastened to the upper front ends of the legs 10 by means of recessed stud screws 46.

Another embodiment of the detachably assembled piece of furniture forms an armchair shown in FIGS. 7a and 7b in a front view and a side view. In this armchair, a front and a rear leg 50 each form a pair of legs that are integrally connected to one another by an approximately horizontally extending armrest part 51 and thus each have a U-shape. The left and right pair of legs in FIG. 7a are each through frames 52 extending parallel to one another and extending between the front and rear legs are connected to one another. The legs made of wood have an approximately oval cross section, so that a frame 52 made of metal with a trumpet-shaped tube end can be attached to the curved outer surface of each leg in the same way as described with reference to FIGS. 1 and 2, a connecting screw 17 extending across the leg. In this armchair or armchair shown in FIGS. 7a and b, the chair seat 53 and the backrest 54 are firmly connected to one another and thus form a coherent part which can consequently be attached in a hanging manner between the two pairs of legs. In a manner corresponding to the manner in which the backrest 19 is fastened in FIG. 1, a connecting screw 17 extends across the leg 50 and is screwed into a threaded bushing (not shown in FIGS. 7a and 7b) at the edge of the seat or the backrest , whereby the seat and backrest are attached to the legs by a total of four connecting screws.

A table shown in side view in FIG. 8 can also be produced according to the same construction principle. The legs 60 of the Ti, which are round in cross section cal are connected to each other at the upper end by four frames 61 made of metal tube, the trumpet-shaped tube ends, like in the examples described above, being fastened to the leg by means of a screw 17 extending transversely through one leg. The table top 62, which represents the planar element, can be fastened by means of screws 63 extending through the frames from below, which is not shown in more detail. 8, two frames 61, which run at right angles to one another, are fastened at the same height to each leg 60. For this purpose, a special type of screw connection is provided, which is also used in the same way when chairs according to FIG. 1 are to be firmly coupled to one another for row seating and when adjacent chairs have a common front and a common rear leg. In this case, the cross frames 11 of two adjacent chairs are attached to the common leg 10. Since the crossing angle of the metal tubes in the cross frame 11 is not 90 °, the tube ends of the two cross frames of adjacent chairs shown broken off in FIG. 9 do not include a 90 ° angle. 8, however, this is the case. 9, the two cross frames 11 with the common leg 10 are closed screw, two intersecting screws 17 lie one above the other across the leg 10 and through a common support member 65, which has two recesses 66 for receiving the countersunk screw heads of the screws 17.

In order to be able to connect the common leg 10 with the frames 11 of the respective adjacent chairs arranged at the same height in a row, the two screws 17 which cross the leg and cross directly one above the other must be screwed into screw nuts fastened at different heights within each frame. For this purpose, a "two-part weld nut" 70 to 78 is fastened near the frame end within the frame. This welding nut consists of a transverse web 70 welded into the frame 11, the ends 71 of which are bent at opposite ends are fastened to the frame by spot welding. In the middle, the crosspiece 70 has an elongated hole 72 for inserting the screw 17 at different heights. On both sides of the elongated hole, a pin or pin 73 is provided at the level of the center of the elongated hole, which protrudes inwards parallel to the frame central axis. The threaded nut 75 is integrally connected to a flange 76, which flange lies on the inside against the crossbar 70 and also to Both sides of the nut 75 each have three holes 77 arranged in a row, which cooperate with the pins 73. With the three bores lying one above the other, it is possible to attach the flange 76 of the screw nut to the Cuer web 70 in three positions of different heights in the vertical direction. For the upper of the two crossing screws 17 in FIG. 9, the screw nut is therefore fixed in the position shown in FIGS. 10 and 11 by engagement of the lowermost bores with the pins. For the lower of the two screws 17, the flange 76 of the screw nut is to be fixed in the lowest position. In the central position, the screw 17 extends on the central axis of the frame. In order to hold the flange 76 with play on the crossbar 70 for the purpose of adjustment to different heights, the flange engages around the vertical edges of the crossbar on opposite sides with inwardly bent edge zones 78.

It is clear from the foregoing that the most diverse types of furniture are detachably assembled according to the same principle and that numerous further modifications are possible with regard to the design of the elements, such as the seat, backrest, etc., in order to produce a piece of furniture adapted to the respective purpose.

Claims

P ate nt claims

1. Detachably assembled furniture, with legs joined together by frames and at least one flat element fastened to the legs or the frames, characterized in that the legs (10, 50, 6θ) at least at the fastening points for the frames (11, 52 , 61) have a curved lateral surface and that the frames made of metal tube with their trumpet-shaped flares that are complementary to the contour of the respective leg and encompass part of the leg circumference, each with one leg by means of one extending in the longitudinal direction of the frame and across the leg Screw (17) are detachably connected and that the planar elements (19, 22, 53, 54, 62) also by means of screws (17, 23) extending through the legs (10, 50) or frames (11, 61) the legs or frames are attached.

2. Furniture according to claim 1, characterized in that the flat element as a chair seat (22, 53), Backrest (19, 54) or table top (62) is formed, which elements are connected to legs (10, 50, 60) and / or frames (11, 52, 61) each with different cross-sections and / or lengths.

3. Furniture according to claim 1 or 2, characterized in that four legs (10) by diagonally extending between the legs and a one-piece cross frame (11) forming metal tubes are connected to each other (Fig. 1, 4, 6).

4. Furniture according to claim 1 or 2, characterized in that a front and a rear leg (50) forms a pair of legs (50, 51) integrally connected by an armrest part (51) and two pairs of legs each between the front and the rear Legs extending, mutually parallel frames (52) are interconnected (Fig. 7).

5. Furniture according to claims 1 to 4, characterized in that the legs (10, 50) consist of wood and each leg at the end of a transverse bore extending through the leg through hole (13) for a screw (17) at right angles to the bore extending groove (14) for receiving a metallic Support part (15), which is located in this groove, the support part (15) on the outside is flush with the peripheral contour of the leg and in a recess (16) receives the head of the screw (17), which the leg (10, 50) with a Frame (11, 52) or with a flat element (19, 53, 54) connects (Fig. 1, 4, 6, 7).

6. Furniture according to claim 5, characterized in that the screw (17) extending through the leg (10, 50) extends into a preferably welded-in screw nut (18) or inside the metal tube forming the frame (11, 52) is screwed into a threaded sleeve (21) which is countersunk at the edge of a planar element (19, 53, 54) (FIGS. 1, 3, 7).

7. Furniture according to claims 5 and 6, characterized in that two frames arranged at the same height and enclosing an angle with one another (11, 61) on the same leg (10, 60) by means of two crossing screws which cross the leg directly one above the other (17) are fastened, the two screw heads of which are held in a supporting part (65) having two recesses (66), such a leg being a table leg (60) or a common leg (10) of adjacent chairs in row seating (FIG. 8 , 9).

8. Furniture according to claims 6 and 7, characterized in that two intersecting and directly one above the other leg (10, 60) transversely penetrating screws (17) in each within each of the frames at the same height adjoining frames (11, 61 ) height-adjustable screw nut (75) are screwed in, which screw nut (75) with a flange (76) rests on the inside against a crossbar (70) welded into the frame near the end of the frame and by means of the screw nut flange (76) and on the crossbar (70 ) trained bores (77) and pins (73) can be fastened to the welded crossbar with respect to the central axis of the frame at different heights (FIGS. 9, 10, 11).

9. Furniture according to the claims 1 to 3, characterized in that a chair seat (22) is connected to the metal tubes forming a cross frame (11) by means of screws (23) which are inserted transversely through them from below and screwed into the underside of the chair seat, which screws extend through spacer bushes (24) arranged between the cross frame and chair seat (Fig. 1).

10. Furniture according to claims 4 to 6, characterized in that a chair seat (53) and a backrest (54) are firmly connected to one another and with the legs (50) of two pairs of legs by means of screws (17) extending horizontally through the legs. are connected (Fig. 7).

11. Furniture according to claim 3, characterized in that on the cross frame (11) of a chair on opposite sides each in a bores (31) in the metal tubes (11) inserted coupling (30, 32) is attached from a curved wire loop, for the purpose of connection to a coupling fastened to the cross frame of an adjacent chair, the two wire loops (30, 32) being designed in such a way that they interlock with one another (FIG. 1).