EP0808588A2 - Framework stand used as underframe for tables or the like - Google Patents

Abstract

The longitudinal frame members are fastened at their ends to two lateral frame members. These members are fastened at their ends to metal tubes which make up the legs of the table. The individual frame members (11) are made of extruded profiles of light alloy. They are of rectangular section. The long walls are of thin plain section, while the short walls are thickened with inward-facing projections (12) which define part-circular grooves (13). These are adapted to accommodate screws for fastening at ends of frame members.

Description

The invention relates to a frame-like frame as a substructure for tables, desks, furniture or the like consisting of metallic hollow profiles which can be screwed together, in particular light metal extruded profiles.

From DE-GM 93 19 206 it is known to use an extruded hollow profile with a square cross section as a component for forming frames or the like. This profile has a continuous screw channel in the central area in the form of a tube, which is connected to the corners of the hollow profile via webs. If you want to connect such profiles to each other, suitable hollow cubes are used in the area of corners, in the walls of which there are bores for the passage of screws which engage in the screw channel of the hollow profile in a self-tapping manner.

The object of the invention is to further develop the above-mentioned prior art and to propose solutions in order to be able to produce frame-like frames for heavy-duty use in a form-accurate and stable manner from light metal hollow profiles without having to carry out any special shaping measures.

According to the invention, this object is achieved in that the longitudinal and transverse spars of the frame form an H-shaped frame, on the free spar ends of which the legs of the frame are fastened, the longitudinal and transverse spars having a rectangular cross section, on the narrow sides of which two webs, which form a continuous screw channel between them, protrude inwards, and with the legs of the frame consist of a tubular profile, on the outer surface of which a first groove is provided which extends along a surface line and in which the narrow side of the free spar end is guided. It proves to be expedient if the shorter cross bars are screwed onto the end faces of two parallel longitudinal bars to form a T-shaped butt joint, the cross bars having the free bar ends.

In order to be able to produce frame-like frames of the type mentioned, the invention only requires two extrusion tools, namely one for the bars and another for the legs. The fitter then only has to cut the profiles to the desired length and drill holes in some places in order to form a very stable frame for forming the frames as a base for tables, desks, furniture or the like.

The stability is particularly brought about in that the free spar ends are guided in elongated and cross-sectionally matching grooves on the outer surface of the legs. This butt joint of the spar and leg is secured on the one hand by two screws which engage in the two screw channels of the spar in a self-tapping manner. In addition, a turnstile is created by guiding the spar end in the first groove. A frame-like frame formed in this way is accordingly very stiff and highly resilient and, moreover, can be produced with the simplest of means.

An important embodiment of the invention is disclosed in subclaims 3 and 4. Then the outer surfaces of the webs, which extend from the narrow sides of the spar into the spar interior, form a support surface for screw heads arranged transversely to the longitudinal axis of the profile. If you make a through hole in the outer wall of the spar corresponding to the diameter of the screw head, the screw head penetrates the outer wall and is supported on the outer surface of the web. If the distance between the outer surface of the web and the outer surface of the profile is equal to the height of the screw head, the screw head is flush with the outer surface.

Such a measure has the particular advantage that the spar profiles can be made relatively thin-walled without the stability suffering because the outer wall does not need to be used as a support surface for screw connections.

With the subject matter of claims 5 to 8, an expedient design of the tubular profile for the legs of the frame is described, according to which there is a second groove extending along a surface line on the outer surface of the tubular profile. This second groove has different functions. On the one hand, screw heads can be attached invisibly. On the other hand, the second groove serves as a channel for cables and the like. Finally, it is provided that this second groove is closed by a cover profile, the outer surface of which adapts to the contour of the tubular profile.

In claim 9, an expedient cross-sectional design of the tubular profile is given, the meaning of which is given on the one hand to form the second groove and on the other hand to create guides for the insertion of pins, hubs or the like. Thereafter, the invention provides radially inwardly extending webs from the tube wall of the tube profile, the ends of which, in cooperation with the bottom of the second groove, form a guide for pins, hubs or the like which are to be inserted into the end of the tube profile. For this purpose, the bottom of the second groove is curved in accordance with the curvature of the hub or the pin.

According to claim 11 it is provided in the individual leg end z. B. use a plastic cap that has an axially continuous bore for receiving a pin, the hub of the cap is guided on the webs and the bottom of the second groove of the leg profile and with bolt-like approaches in the space between the webs and protrudes from the bottom of the second groove.

On the one hand, such a cap can be used to guide foot parts which expediently have a support plate in connection with a pin guided in the cap. If these foot parts should be adjustable in height, the pin can be designed as a threaded spindle and the bore of the cap as a threaded hole.

An identical cap can also be inserted into the tubular profile on the top of the leg. The pin of another fitting can be inserted into the bore of the cap, which is screwed via a flange plate, for example to a table top or the lower part of a piece of furniture or the like. This measure also has the advantage that an inclined position of the table top or the like to be screwed on can be achieved by adjusting the height of the pin in the bore of the cap, which is advantageous, for example, if the frame according to the invention is used for the production of drawing tables, consoles or the like shall be.

Further details and exemplary embodiments result from the features of claims 13 to 20.

Figur 1:

eine Draufsicht auf H-förmiges Gestell mit Längs- und Querholmen sowie Beinen,

Figur 2:

einen Querschnitt durch ein rechteckiges Hohlprofil zur Verwendung als Längs- oder/und Querholm,

Figur 3:

einen Querschnitt durch das Hohlprofil gemäß Figur 2 in Verbindung mit einer Stoßverschraubung zu einem anderen Hohlprofil,

Figur 4:

einen Querschnitt durch eine Stoßverbindung zwischen dem Hohlprofil eines Holmes und dem Rohrprofil eines Beines,

Figur 5:

einen Querschnitt durch den oberen Bereich eines hinteren Beines mit einem eingesetzten Beschlag zur Schrägstellung einer Tischplatte,

Figur 6:

einen Querschnitt durch das Bein längs der Linie VI-VI in Figur 5,

Figuren 7 und 8:

Stirnansicht und Querschnitt durch eine in das Rohrprofil des Beines einsetzbare Kappe,

Figur 9:

eine Ansicht eines Stifthakens,

Figur 10:

eine Seitenansicht auf einen in das obere Ende eines vorderen Beines einsetzbaren Beschlag zur Schrägstellung einer Tischplatte,

Figur 11:

Seitenansicht eines an das rahmenartige Gestell anschließbaren PC-Supports und

Figur 12:

eine Draufsicht auf den PC-Support gemäß Figur 11.

The invention is shown schematically and for example in the drawing. Show it

Figure 1:

a plan view of an H-shaped frame with longitudinal and transverse bars and legs,

Figure 2:

a cross section through a rectangular hollow profile for use as a longitudinal and / or cross member,

Figure 3:

3 shows a cross section through the hollow profile according to FIG. 2 in connection with a butt screw connection to another hollow profile,

Figure 4:

a cross section through a butt joint between the hollow profile of a spar and the tubular profile of a leg,

Figure 5:

a cross section through the upper region of a rear leg with an inserted fitting for inclining a table top,

Figure 6:

3 shows a cross section through the leg along the line VI-VI in FIG. 5,

Figures 7 and 8:

Front view and cross section through a cap that can be inserted into the tubular profile of the leg,

Figure 9:

a view of a pen hook,

Figure 10:

2 shows a side view of a fitting which can be inserted into the upper end of a front leg for tilting a table top,

Figure 11:

Side view of a PC support and connectable to the frame-like frame

Figure 12:

a plan view of the PC support according to Figure 11.

In the exemplary embodiment in FIG. 1, the basic view of the frame (2) according to the invention is shown, which in connection with, for example, a plate can represent the substructure for a table (1), desk, furniture or the like. In principle, the frame (2) has an H-shape, according to which two longitudinal bars (4) are connected at the end to two transverse bars (3) by means of a butt screw connection (9). In the exemplary embodiment, the cross bars (3) protrude beyond the butt connection with the longitudinal bars (4) and form free bar ends (24), to which tubular profiles as legs (5) are fastened by means of a screw connection (10). The tubular profiles (5) each have a first groove (6) on their outer surface along a surface line, the width of which corresponds to the width of the cross member (3). The free end of the spar (24) is guided in this first groove (6) and thus secured against rotation.

On the side opposite the first groove (6), the tubular profile (5) has a second groove (7) which is covered by a cover profile (8). This second groove (7) serves on the one hand to receive the screw heads for the screw connections (10) and on the other hand forms a cable duct (25) (cf. FIG. 6).

The longitudinal spar (4) or transverse spar (3) is formed by a hollow profile (11) with a rectangular cross section made of light metal, in particular an extruded hollow profile (11). On the inside of the narrow sides of the hollow profile (11) there are two spaced apart webs (12) which extend towards the interior and form a screw channel (13) between them. This screw channel (13) receives the individual screw connection (9, 10), the screw shafts of which have self-tapping properties.

An intermediate space (14) is formed between the outer surface (15) of the individual web (12) and the inner surface of the outer wall of the hollow profile (11), the outer web surface (15) being parallel to the outer surface (17) of the hollow profile (11).

As FIG. 3 specifically shows, the outer web surface (15) serves as a support for the screw head (18) of the screw connection (9). Accordingly, the profile wall has a through hole (19) which corresponds to the size of the screw head (18). If the distance (16) between the web outer surface (15) and the profile outer surface (17) corresponds to the height of the screw head (18), then the screw (10) with its screw head (18) is flush with the outer surface (17) of the hollow profile (11 ).

In the example of FIG. 3, it can also be seen that the webs (12) are drilled through a through hole (53) which is to be aligned with the screw channel (13) of the profile (11) to be connected and serves to receive the screw shaft including its lateral guidance.

The cross section of Figure 3 shows the butt connection between the cross member (3) and the longitudinal spar (4), it being important that the end face of the longitudinal spar (4) is exactly parallel to the outer wall surface (17) of the cross section (3).

In the embodiment of Figure 4, the butt joint between the free end of the spar (24) of the cross member (3) and the tubular profile (5) of the leg is shown. The first groove (6) for guiding the end region of the free spar end (24) can be clearly seen. The edge of the groove (6) should be chamfered to make it easier to insert the cross bar (3) into the groove (6).

Opposite this first groove (6) is a second groove (7) which forms a channel (25) which is closed to the outside by a cover profile (8). This cover profile (8) is inserted with the aid of its webs (27) into the groove (7) in a snap-lock manner. Accordingly, the webs (27) of the cover profile (8) and the side walls (28) of the second groove (7) are curved or recessed in order to bring about the snap lock connection.

In the bottom (20) of the groove (7) there are through bores (21) coaxial with the position of the screw connection (10) with which the free end of the spar (24) is screwed to the tubular profile (5). The screw head (18) must be passed through this through hole (21). When screwing, the screw head (18) is supported on the groove bottom (26) of the first groove (6).

Two guide webs (22) extend radially inward from the wall of the tubular profile (5). The free ends of these guide webs (22) circumscribe a circle (23) together with the curved outer surface of the groove base (20) and form a guide for a pin or a hub, as will be described later.

FIGS. 5 and 10 describe the connection of a plate (38) to the legs (5), at the same time showing how the plate (38) can be adjusted into one or more inclined positions using the fittings described below. The leg (5) shown in FIG. 5 is connected in this example to the rear of the plate (38) and the leg (5) shown in FIG. 10 to the front of the plate (38).

In the upper end of the respective tubular profile (5) of a leg, as shown in Figures 5 and 6, a z. B existing plastic cap (30) is used, which has a central through hole (31) to guide the pin (32) of a fitting (36) therein. This cap (30) has an external disc (55) which has the same diameter as the tubular profile (5). The hub (33) of the cap (30) is, as has already been described for Figure 4, between the webs (22) and the groove bottom (20) of the hollow profile (5).

Two bolt-like projections (34) extend outward from the hub (33), the circumference of which is guided in the tubular profile (5).

The pin (32) guided in the hub (33) of the cap (30) has a number of bores (40) transversely to the longitudinal axis, which are equidistant from one another. In order to fix the position of the pin (32) in the hub (33), there is a radial threaded bore in the bolt-like extension (34) for receiving a locking element (41) which, in the example of FIG. 6, is designed as grub screws. This locking element (41) has a protruding locking ball (42) on the end face, which is rotatably guided in the locking element (41) and is under the action of a spring (43). The locking ball (42) protrudes slightly over the end of the locking element (41) out and engages in a bore (40) of the pin (32). Positional centering is thereby brought about.

In order to avoid the axial displacement of the pin (32) in the cap (30), the outer surface (44) of the cap (30) has a groove-shaped groove (45) which extends radially over the entire width of the outer surface (44). A pin hook (46) shown in FIG. 9 is inserted into this groove (45), which penetrates the associated bore (40) of the pin (32) and merges into a hook part (47). This hook part (47) is dimensioned such that it can engage from the outside in another bore (40) of the pin (32). The hook part (47) is slightly V-shaped. The pin hook (46) consists of a resilient material, so that when the hook part (47) is inserted into the bore (40), a pre-tensioning of the hook part (47) has to be overcome. This prevents the pin hook (46) from automatically detaching from the pin (32).

It can also be seen in FIG. 6 that the diameter of the hub (33) is to be dimensioned such that sufficient space is created between the outer circumference of the hub (33) and the groove base (26) for the screw head (18) for screwing therein (10) to accommodate.

The cap (30) is shown again in FIGS. 7 and 8 as an individual part, it being recognizable that a recess (54) is provided in the end plate of the cap (30) which leads to the channel (25) of the tubular profile (5) of the Legs should be congruent. This is intended to create the possibility of being able to pass cables through the end of the tubular profile (5).

Figure 10 shows the arrangement of the cap (30) at the upper end of the front tubular profile (5) of the leg, with a spindle pin (50) of a fitting (35) in the bore engages the cap (30), which can be designed as a threaded bore. You can therefore adjust the height of the fitting (35) relative to the tubular profile (5) and fix an inclined position of the plate (38) in the desired inclined position.

In the fitting (35) or in the spindle pin (50) there is a pin (51) which engages in an upward elongated hole (52). This measure is in operative connection with the design of the fitting (36) in FIG. 5. This fitting (36) has a flange plate (37) on which, for example, a plate (38), e.g. B. a table top or the bottom of a piece of furniture. The flange plate (37) is rotatably mounted on the pin (32) via the joint (39). This creates the possibility of adjusting the plate (38) at an angle. For this purpose, the pins (32) are adjusted in height relative to the cap (30) by the desired amount and secured by engagement of the pin hook (46) in the bores (40). In order to compensate for the length differences between the individual tube profiles caused by the height adjustment, the arrangement with pin (51) and slot (52) is provided on the fitting (35) of the front leg (5).

If the table top (38) is to be inclined by a larger angle, it is advisable to arrange the elongated hole (25) horizontally or to provide a curved elongated hole. On top of that, it is advisable to round off the upper end of the pin (50) more than shown in FIG. 10. The thread (49) can also be replaced by a pin arrangement (32, 40), as shown in FIG. 5.

The examples in FIGS. 11 and 12 show the construction of an add-on unit which can be connected to the frame-like base frame (2), for example in the form of a PC support (57). The plate (38) and a spar (3 or 4) are hinted at. A mounting plate (57) is supported on the bar (3, 4) in the manner of a sliding guide (58), which has guide rollers (59) acting laterally on the bar (3, 4). This allows the mounting plate (57) to be easily moved along the bar (3, 4). A locking screw (60) acts against the underside of the spar (3, 4) and is guided on a bearing block (61) encompassing the spar (3, 4).

As shown in FIG. 12, the mounting plate (57) is triangular in the exemplary embodiment. Accordingly, it has two sliding guides (58) and a holder (62) for connection to a leg (63). This holder (62) can contain, for example, an angle (64), the upright leg of which is dimensioned such that it engages in the groove (6), as is shown especially in FIG. 4. This creates a torsionally rigid connection.

In the leg (63), in accordance with the examples in FIGS. 5 or 10, a pin (32) is guided such that it can be adjusted in height and carries a plate (65) at the upper end for receiving a PC (66).

This design has the advantage that the PC (66) does not take up space on the worktop (38) of the frame-like frame (2).
The leg (63) is supported with a foot (67) or a roller against the floor.

If you do not want an inclined position of the plate (38), it is advisable to provide axially parallel bores (56) in the outer disc (55) of the cap (30) through which screws (not shown) for direct fastening of the disc (55) to Be guided under the surface of the plate (38). The cap (30) fastened in this way is secured by radial screwing after insertion into the tubular profile (5) of the leg.

The cap (30) can also be connected to the lower end of the leg (5), for example to compensate for uneven floors. In this case, it is advisable to provide a continuous thread (49) (as shown for example in FIG. 10) in the wall of the bore (31) and to screw the threaded pin of a footplate so that it can be adjusted in height.

PARTS LIST

1

Table, desk or the like

2nd

Light metal frame

3rd

Querholm

4th

Longitudinal spar

5

Leg, tube profile

6

first groove

7

second groove

8th

Cover profile

9

Screw connection

10th

Screw connection

11

Hollow profile made of light metal

12th

web

13

Screw channel

14

Space

15

Stegau surface

16

distance

17th

Profile outer surface

18th

Screw head

19th

Through hole

20th

Groove bottom

21

Through hole

22

Boardwalk

23

Circular arc

24th

free spar end

25th

channel

26

Groove bottom

27

web

28

Side wall

29

Cones

30th

cap

31

drilling

32

Cones

33

hub

34

bar-like approach

35

Fitting (foot part)

36

fitting

37

Flange plate

38

plate

39

joint

40

drilling

41

Locking element (grub screw)

42

Locking bracket

43

feather

44

Outside surface

45

channel groove

46

Pen hook

47

Hook part

48

Tapped hole

49

Tapped hole

50

Spindle pin

51

pen

52

Long hole

53

Through hole

54

Recess

55

disc

56

drilling

57

Mounting plate

58

Sliding guide

59

Leadership role

60

Locking screw

61

Bearing block

62

bracket

63

leg

64

angle

65

plate

66

PC

67

foot

Claims (20)

Frame-like frame (2) as a substructure for tables (1), desks, furniture or the like, consisting of metallic hollow profiles (3, 4, 5) which can be screwed together, in particular light metal extruded profiles, characterized in that longitudinal and transverse bars (4, 3 ) of the frame (2) form an H-shaped frame, on the free spar ends (24) of which the legs (5) of the frame (2) are fastened, the longitudinal and transverse spars (4, 3) having a rectangular cross section the narrow sides of which two webs (12), which form a continuous screw channel (13) between them, project inwards, and the legs (5) of the frame (2) consist of a tubular profile, on the outer surface of which extends along a surface line first groove (6) is provided, in which the narrow side of the free spar end (24) is guided. Frame according to claim 1, characterized in that the shorter cross bars (3) are screwed to the end faces of two parallel longitudinal bars (4) to form a T-shaped butt joint and that the cross bars (3) have the free bar ends (24). Frame according to claim 1 or 2, characterized in that the outer surfaces (15) of the webs (12) extend parallel to the wider outer surfaces (17) of the spar profiles (3, 4) and as a support surface for the outer surface (transverse to the longitudinal axis of the profile) 17) penetrating screw heads (53) are used. Frame according to claim 3, characterized in that the distance (16) between the web outer surface (15) and the profile outer surface (17) corresponds to the height of a screw head (53) which fills a corresponding through hole (19) flush in the profile wall. Frame according to claim 1 or one of the following, characterized in that the tubular profile (5) has a second outer groove (7) which extends along a surface line and which is the first groove (6) for receiving the free spar end (24) opposite and can be closed by a U-shaped cover profile (8) while leaving a continuous channel (25). Frame according to claim 5, characterized in that in the bottom of the second groove (7) two through bores (21) are provided for the heads (53) of screws (10) which are located on the inner surface of the bottom (26) of the first groove ( 6) support and engage their threaded shafts self-tapping in the screw channels (13) of the free spar ends (24). Frame according to claim 5 or 6, characterized in that the webs (27) of the cover profile (8) engage in undercuts in the undercuts of the side walls (28) of the second groove (7). Frame according to one of claims 5 to 7, characterized in that the channel (25) enclosed by the cover profile (8) is intended for receiving cables. Frame according to claim 1 or one of the following, characterized in that in the tubular profile of the leg (5) radially extending webs (22) with their ends in cooperation with the bottom (20) of the second groove (7) a guide for one in the Form leg (5) insertable hub (33). Frame according to claim 9, characterized in that the base (20) of the second groove (7) is curved in accordance with the curvature (23) of the hub (33). Frame according to claim 1 or one of the following, characterized in that in the individual leg end (5) a z. B. existing plastic cap (30) is used, which has an axial through bore (31) for receiving a pin (32), the hub (33) of the cap (30) on the webs (22) and the bottom (20) of the second groove (7) of the leg profile (5) is guided and projects with bolt-like projections (34) into the space between the webs (22) and the bottom (20) of the second groove (7). Frame according to claim 11, characterized in that the pin (32) is part of a fitting (35, 36) which is intended as a foot part (35) or flange (36) for attachment to a plate (38). Frame according to claim 12, characterized in that a flange plate (37) is articulated (39) to the pin (34). Frame according to claim 12 or 13, characterized in that a row of radial bores (40) and in one in the pin (32) bar-like extension (34) of the plastic cap (30) a radial locking element (41) is arranged, which engages in one of the bores (40). Frame according to claim 14, characterized in that the locking element (41) is designed as a grub screw with a locking ball (42) which is resiliently guided therein and engages in the bore (40). Frame according to claim 11 or one of the following, characterized in that a radially extending groove-shaped groove (45) is provided in the front outer surface (44) of the cap (30), in which a U-shaped pin hook (46) is guided, which passes through one of the bores (40) and engages with its curved hook part (47) in another bore (40). Frame according to claim 16, characterized in that the hook part (47) has a resilient property and is slightly V-shaped. Frame according to claim 11 or one of the following, characterized in that the cap (30) has a continuous threaded bore (49) in which a spindle pin (50) of a fitting (35) designed as a foot part is adjustable in height. Frame, in particular according to claim 1 or one of the following, characterized in that a sliding guide (58) is arranged in a longitudinally displaceable and fixable manner on a longitudinal or transverse spar (4,3) of the frame-like frame (2), said slide guide (58) being attached via a fastening plate (57) or similar is connected to a leg (63) provided outside the table (1), which is supported on the floor and carries, for example, a PC. Frame according to claim 19, characterized in that the fastening plate (57) is connected to the leg (63) via an angle (64), the upright leg of the angle (64) into an external longitudinal groove (6) of the leg (63) rigidly engages.

Images