DE19756259C1 - Foldable leg frame for table - Google Patents

Abstract

The foldable leg frame (1) has a pair of legs (2) with a rotary shaft (3) for connection to the table top. At least one reinforcing beam (5) extends perpendicular to the shaft. The shaft has two perpendicular lugs (9) which fit into bores (8) in the reinforcing beam (5) when the legs are folded.

Description

TECHNICAL AREA

The present invention relates to collapsible table bases at least one pair of table legs, with one for attaching the table base the underside of the table top rotatably mounted shaft, with a on the Shaft arranged compression spring, which is against one of the end bearings supports and wherein the shaft is axially displaceable against the spring force, with an arrest tion mechanism, which the table leg pair in an unfolded state locked and attachable to the underside of the table top across the shaft Stiffening elements.

STATE OF THE ART

Table bases of the type mentioned are common in everyday life used. When folded, they enable space-saving storage and easy transport of the tables.  

Such table bases, however, can often only be un folded out stabilize enough. A satisfactory locking can only be achieved if the folding mechanism is designed complex.

A table base with a comparatively simple mechanism is for example known from DE 43 26 941 A1. It provides table leg frames, which under the Table top are pivotable and a locking device for locking the same in expanded and collapsed. Each table leg frame sits on a hollow shaft that pivoted at the ends in bearing brackets attached under the table top is. The hollow shaft has a conical taper in a conical end Bearing bore of the associated one bearing angle and is against the force of one Spring axially displaceable by a release lever to a locking pin from a Loosen the hole in the bearing bracket. When the table is set up, an Si prevents angle an unintentional actuation of the release lever. The securing bracket swivels by its own weight with a table set up between a square Pipe piece on the hollow shaft and the associated bearing bracket.

To prevent instability of the table when unfolded from the folding mechanism described above, however, low bearing tolerances be respected. But even then, it cannot be completely ruled out that the bearing play, for example, by frequently operating the folding mechanism the hollow shaft is enlarged.

PRESENTATION OF THE INVENTION

The object of the invention is therefore a collapsible table base with egg to create an easy-to-use mechanism, which when unfolded is securely lockable and low demands on the manufacturing tolerances of the con structural parts.

The object is achieved in a table base frame according to the invention in that  that a stiffening element is arranged substantially perpendicular to the shaft net and that the shaft in the longitudinal direction on its outer surface has at least two cones, which in the unfolded state of the Pair of table legs with recesses or bores arranged in the stiffening element are engaged.

Due to the central locking of the shaft supporting the table legs and both cones the overall construction is reliably stabilized and is largely insensitive against tolerance fluctuations. In particular, the bearing of the shaft can therefore simple and therefore inexpensive.

A preferred embodiment of the invention is characterized in that in folded state of the table leg pairs at least one of the cones with one in the stiffening element arranged recess or bore is engaged.

The additional locking of the table legs when folded ensures you safe transport of those provided with the table base frame according to the invention Tables. In this way, the table can be transported and stored in any position without the table legs surprisingly unfolding and an injury represent risk of injury.

Further exemplary embodiments result from the subclaims.

BRIEF EXPLANATION OF THE FIGURES

In the following, the invention will be described in connection with exemplary embodiments be explained in more detail with the drawing. Show it:

Fig. 1 shows the basic structure of an inventive table underframe,

Fig. 2 is a detail of the central locking mechanism,

Fig. 3 is a detailed cross section of the end bearing provided with a lever releasing the locking shaft and

Fig. 4 shows a detailed cross section of the further bearing of the shaft.

WAYS OF CARRYING OUT THE INVENTION

Fig. 1 shows the basic structure of a table base frame 1 according to the vorlie invention. The table base frame has table legs 2 , which are arranged on an end held in bearings 4 shaft 3 . On the transverse axis of the shaft 3 , a T-profile 5 is provided for stiffening, which is attached to the underside of a (not shown) table top with screws 6 .

As is clear from Fig. 2, the T-profile 5 has a recess 7 in its end portion, which is preferably designed to reduce frictional losses such that it adapts to the cross-sectional profile of the shaft 3 . Furthermore, at least two recesses or bores 8 are provided in the immediate vicinity of the recess 7 and serve to receive cones 9 fastened to the shaft. The cones 9 are arranged in such a way that, when the table legs 2 are folded out, the cones 9 engage with the respectively assigned recesses or bores 8 . The cones 9 are preferably aligned parallel to the longitudinal axis of the shaft 3 .

The table legs are folded in, as can be seen from FIG. 3, by means of a lever 10 which is mounted in the bearing and which actuates an eccentric 11 when it is folded over. The eccentric 11 then exerts a pressure on the shaft 3 in the direction of its longitudinal axis and shifts the shaft 3 in the direction of the arrow P against a pressure spring 12 attached to the opposite end of the shaft 3 . The longitudinal displacement of the shaft 3 is preferably dimensioned such that the cones 9 are no longer in engagement with the depressions or bores 8 after the lever 10 has been completely turned over.

After the locking has been released, the table legs 2 are folded in by being pivoted about 90 ° about the longitudinal axis of the shaft. The movement is illustrated by arrow A in FIG. 2. In order to stabilize the state thus reached, the lever 10 is put back. The pressure of the end of the shaft 3 angeord Neten spring 12 shifts the shaft 3 back into its original position and one of the cones 9 engages in a further provided on the T-profile 5 recess or bore 8 . The transport of the folded table is simplified by carrying handles 13 attached to the T-profile 5 .

The bearings attached to the end of the shaft 3 are shown in cross section in FIGS. 3 and 4. Fig. 3 illustrates the provided with the lever 10 bearing 4 a, which is essentially an arranged on the underside of the table top 14 bearing housing 15 , an integral part of the lever 10 and with respect to this angled axis 16 and an opening 17 for receiving the shaft 3 has. The axis 16 is, as can be seen in Fig. 2, carried out through two in the bearing housing 15 attached Boh stanchions 18 and extends substantially parallel to the plane of the table top 14th On the rotatably mounted axis 16 there is a fixed connection to the eccentric 11 , which bears against the shaft 3 and, in a first state of the lever 10 (by solid lines), is in a position in which its center of gravity S faces away from the shaft 3 Side lies.

A pivoting of the lever 10 in a second position (dashed lines) by a win angle of approximately 90 ° shifts the center of gravity S of the eccentric 11 in the direction of the shaft 3 , so that a pressure in the direction of the longitudinal axis against the opposite end the shaft 3 located compression spring 12 is exerted.

Fig. 4 shows the compression spring 12 provided bearing 4 b, which, similar to the bearing 4 a described above, has a bearing housing 19 with two bores 18 through which a rigid axis 20 is carried out. A fastening means 22 , which holds the compression spring 12 and against whose shoulder 23 the compression spring 12 is supported, is arranged on the axis 20 by means of a screw 21 . The opposite free end of the compression spring 12 is held by a further fastening means 24 and supported by means of a shoulder 25 . The surface of the fastening means 24 facing away from the spring 12 is supported on a plate 25 which is firmly connected to the shaft 3 .

The free distance L located between the facing surfaces of the two fastening means 22 and 24 limits the maximum displacement of the shaft 3 and is to be determined in such a way that the cones 9 can be removed from the associated depressions or bores 8 without problems.

In order to avoid damage to a table top lying on another table (not shown), a stacking buffer 27 made of felt or the like is attached to the upper surface 26 of the bearings 4 . This forms a support surface when the tables are placed one on top of the other with the folded table frames 1 .

Reference list

1

Table base

2nd

Table leg

3rd

wave

4th

a,

4th

b camp

5

T-profile

6

screw

7

Recess

8th

Deepening or drilling

9

cone

10th

lever

11

eccentric

12th

Compression spring

13

Handle

14

Table top

15

Bearing housing

16

axis

17th

opening

18th

drilling

19th

Bearing housing

20th

axis

21

screw

22

Fasteners

23

paragraph

24th

Fasteners

25th

plate

26

surface

27

Stacking buffer

Claims (8)

1. Foldable table base frame ( 1 ) with at least one table pair of legs ( 2 ), with a shaft ( 3 ) which is rotatably mounted at the end for fastening the table base frame ( 1 ) to the underside of the table top ( 14 ), with one on the shaft ( 3 ) orderly compression spring ( 12 ), which is supported against one of the end bearings ( 4 ) and the shaft ( 3 ) is axially displaceable against the spring force, with a locking mechanism, which locks the pair of table legs ( 2 ) in an unfolded state and with the underside of the table top ( 14 ) transverse to the shaft ( 3 ) fixable stiffening elements ( 5 ), characterized in that at least one Ver stiffening element ( 5 ) is arranged substantially perpendicular to the shaft and that the shaft ( 3 ) in the longitudinal direction on it has at least two cones ( 9 ) on the outer surface, which in the unfolded state of the table pairs of legs ( 2 ) are arranged in the stiffening element ( 5 ) eten wells or bores ( 8 ) are engaged. 2. Collapsible table base frame according to claim 1, characterized in that in the folded state of the table leg pairs ( 2 ) at least one of the cones ( 9 ) with a in the stiffening element ( 5 ) arranged recess or bore ( 8 ) is engaged. 3. Collapsible table base frame according to claim 1 or 2, characterized in that in the vicinity of an end portion of the shaft ( 3 ) a locking of the table leg pair ( 2 ) releasing lever ( 10 ) is provided. 4. Collapsible table base frame according to claim 3, characterized in that folding the lever ( 10 ) moves an eccentric ( 11 ) such that the eccentric ( 11 ) axially pushes the shaft ( 3 ) against the spring force of the compression spring ( 12 ) and the cones ( 9 ) are no longer in engagement with the depressions or bores ( 8 ) assigned to them. 5. Collapsible table base frame according to one of claims 1 to 4, characterized in that in an end portion of the shaft ( 3 ) a fastening means ( 22 ) is provided, against which a free end of the compression spring ( 12 ) is supported and that the other free End of the spring is supported against a second fastening means ( 24 ) secured in the bearing ( 4 ). 6. Collapsible table base frame according to one of claims 1 to 5, characterized in that the bearings ( 4 ) on their surface facing away from the table top ( 14 ) have stacking buffers ( 27 ). 7. Collapsible table base frame according to claim 6, characterized in that the stacking buffers ( 27 ) are made of a damping material, such as felt or the like. 8. Collapsible table base frame according to one of claims 1 to 7, characterized in that carrying handles ( 13 ) are provided.