EP3282894A1

EP3282894A1 - Frame structure for a table or desk

Info

Publication number: EP3282894A1
Application number: EP16718619.6A
Authority: EP
Inventors: Andreas Oberndörfer
Original assignee: Dewertokin GmbH
Current assignee: Dewertokin Technology Group Co Ltd
Priority date: 2015-04-13
Filing date: 2016-04-12
Publication date: 2018-02-21
Anticipated expiration: 2036-04-12
Also published as: WO2016166109A1; CN107734996A; US10327542B2; EP3282894B1; US20180110325A1; DE102015105588A1; DK3282894T3

Abstract

The invention relates to a frame for supporting a top of a table or desk at a working height, said frame being designed for fastening legs. The frame comprises at least two profiled bodies that can be connected to each other via at least two brackets (10, 12), said brackets (10, 12) being designed to extend over or around edges of the profiled bodies.

Description

Table frame for a table

The invention relates to a table frame for supporting a table top of a table at a working height, wherein the table frame is further adapted for fixing table legs, in particular for height-adjustable table legs of an office desk.

Known table racks consist of several welded together metal profiles to form a preferably closed profile frame, which forms a mounting position substantially horizontally extending- Tischebene, on the top side a table top is fixed and on which also the table feet in installation position vertically and thus transversely to the table level extending table feet are mounted, which support the table opposite the ground, so extend between the table frame and floor. The table feet can be vertical depending on the attachment point of the

extending the leg of the table on the upright

Table foot can be designed either as a T or L version in order to realize different installation situations and to improve the tipping stability for larger table loads. The table tops of office tables usually have a width or depth between 1000 - 1200mm as well

different lengths, preferably 2000 to 2500 mm. Since the table racks usually recede from the table top, the outer dimensions of the table racks insofar correspondingly smaller.

In modern tables, the legs are preferably designed as height-adjustable lifting columns with 2-3 telescopically telescoping telescopic elements. The

Height adjustment is usually carried out by an electric motor with a worm gear, which engages via a jaw clutch in a spindle which is installed in the lifting columns.

Such a table must have a defined cross and

Longitudinal stiffness to meet the relevant standards, in particular EN 527-2 and -3 as well as the requirements of the standards committee Office Planning in DIN Technical Report No. 147 as well as other internationally valid standards.

Disadvantages of the prior art

Disadvantages are the high storage costs for

different table variations and sizes, because these

Usually prefabricated must be welded and thus a relatively large amount of storage space for different sized tables is needed.

Technical problem / task

Based on this prior art, the present invention seeks to at least partially avoid these disadvantages and to provide a table frame, which avoids the disadvantages mentioned at least partially and in particular significantly reduces the storage costs.

invention

This object is already achieved in a table frame of the type mentioned in that the table frame is designed as a modular connectable plug-in system, wherein the geometry of the components is chosen so that they have at least assembled in the installed position the necessary longitudinal and transverse stiffness of a table frame. The individual parts of the plug-in system preferably consist of folded or bent metal profiles, in particular with a material thickness of 1.5 to 3 mm. The geometry of the components of the plug-in system is designed so that these alone or preferably in the installed position form an inherently rigid frame, which has the bending stiffness necessary for a table frame and thus the above-mentioned

Meets requirements.

As a particularly good compromise between compactness of the packed items of the table frame and their stability in mounting position has a trough-shaped

Profile body proven which the load, so

Flexural rigidity of the table frame in the longitudinal direction, which is preferably supported by the brackets. Preferably, the profile body - in cross-section - a channel-like, so circumferentially closed, or

trough-like, ie 3-sided closed geometry with a preferred dimension of 120 x 60 mm in cross-section and 500 mm in length. The trough-like geometry of the profile body has the advantage that it is better to stack for transport, but in installation position has substantially the same equatorial moment of inertia against bending as the closed profile body.

The trough-shaped profile body form in the installed position with the associated with these, this preferably peripherally encompassing and position-fixing brackets the required longitudinal profiles of the table frame. The brackets are preferably designed so that these with the profile frame in

Installation position are stiffness connectable connectable

preferably by these overlap the profile elements at least in sections, in particular the in

Longitudinal edges of the profile body or. This can be done for example by hooks on the one component, in the installed position in corresponding openings on the Intervene joining partner. Preferably, a plurality of openings are provided in the profile bodies to the

To use profile body so to build different sized or long tables.

Preferably, the brackets are formed so that they overlap the two aligned along a common central longitudinal axis of the table frame profile body in installation position. Thus, the brackets

usually much longer than the profile body

trained and about twice as long as the profile body, but can also be longer.

In the preferred embodiment, the brackets are as folded sheet metal profiles with a preferably in

Substantially Z-shaped in cross-section, comprising a longer center leg, the one

Contact surface to the outside system to the

Vertically defined leg of the profile body and of which transversely thereto at an upper end of a table leg for attachment to the table top and a EingreifSchenkel for engaging in openings in the horizontal leg of

Profile body extending in addition to

Fastening means, in particular integrally formed hook for engaging in the openings in the

Horizontal legs are formed.

Preferably, the table feet are connectable to the profile bodies. Preferably, the profile body on one of its end walls in each case a recess for receiving the table feet or lifting column in installation position, which is thus designed large enough to allow passage of the lifting column, wherein the transverse to the longitudinal direction at the upper end arranged motor housing of the lifting column in installation position Is received in the profile element, preferably non-positively and / or positively. At the preferred

Embodiment are in the lateral surface of the profile body Recesses provided, which engage projections on the outside of the motor housing in the installed position. This

Recesses can be designed as a guide slots to make the correct installation visible and also to realize in the installation position or end position of the mounting position jamming of the components in relation to each other,

preferably by a trained accordingly

Clamp seat between the motor housing and the profile frame.

A further development provides that the brackets also engage over these recesses in the profile frame with a recess or opening formed correspondingly in the installed position.

Because the stability of the profile body mainly in

Fastening range of the lifting columns is required, it is sufficient if the profile body is not over the entire length below the table but only in the area of

Extending front ends. It has been shown that where the lifting columns are connected to the frame, this must be particularly rigid. The intermediate region can be designed to save material. This embodiment thus makes it possible to reduce the

Weight and a simplified design.

Other table components, eg. B. a control unit for the realization of the synchronous operation of the electric motors in the lifting columns and cables for the power supply and / or

Connection of the electrical components can be protected and hidden absorbed and guided within this profile body, the entry or exit of the cable from the profile bodies can be done either laterally or via additional openings. The profile body thus protect and conceal table components, thus serving at the same time as a cable or conduit.

As trough-shaped in the context of the invention is a Channel-shaped geometry to understand, which is formed in the cross-section substantially rectangular. The preferred embodiment is similar in size and geometry to a sill channel for mounting to a wall. In addition, however, still at the upper free end of the profile body profile flanges for attachment to the underside of

Table top provided, preferably designed as

circumferential profile flange.

The attachment of the table feet, preferably designed as height-adjustable lifting columns on the table frame is preferably such that the table legs or the motor housing can be inserted in the mounting position in the profile body, the profile body surrounds the table legs or the motor housing in installation position.

The connection technology between the components can

include stiffness-demanding clamping means. Preferably, these clamping means are formed between the profile body and the table base and comprise projections provided on the joining partner, e.g. designed as pins, molded-on projections, screws or the like, which engage ii installation position in a guide slot of the thus cooperating in the installation position joining partner. The practically preferred embodiment comprises pins protruding from a box-shaped motor housing at the top of the table base, e.g. designed as Allen screws in

Guide slots engage the profile body.

The guide slot preferably has a substantially L-shaped geometry with an insertion leg extending vertically in the installed position and a clamping leg extending transversely thereto, which also tapers conically in the direction of insertion toward the end in order to move the guide rail

Allen screws in installation position in this to be clamped.

Furthermore, the table frame comprises transverse profiles which receive the essential load of the table frame in the transverse direction and connectable to the other components of the table frame. Preferably, these transverse profiles are designed as head pieces, which at the top or front sides of the

Table frame extending transversely to the longitudinal axis with the

Profile bodies are connectable. This is preferably done so that they are also connected to the table base or the lifting column at the head end. The connecting means may comprise clamping or clamping means, which not only connect the components in installation position with each other but also clamp. These head pieces can be, for example, simple angle profiles. Other designs are

of course possible, for example with a width increasing from the ends of the head towards its center, or with an aesthetic or identifying one

Design of the outer sides, such as with flat embellishments or company marks. The head pieces can also

asymmetrically designed and / or mounted, if

For example, the lifting columns are not aligned with the central longitudinal axis of the table top. According to a preferred development, all the components of the table frame are formed on the mounting position in the upper end of the table for attachment to the underside of the table top, preferably comprising at least one flange

a plurality of, in particular equidistantly spaced holes in the appropriate mounting screws are screwed into the bottom of the table top. In this case, the openings are formed so that in the installed position screws can penetrate the openings of several components at the same time, so the components overlap in the installed position. Between the brackets and tub profiles 4.6 can

preferably corresponding in installation position, ie

be provided overlapping arranged holes or holes through which connecting means which connect the two joining partners in installation position, can be introduced. Thus, a firm and non-slip / positive connection

realized between tub profiles and brackets preferably on the lateral vertical legs. Preferably, expansion rivets are used for the connection

brace circumferentially in the holes, so form within the corresponding or aligned bores position-fixing clamping sleeves.

The invention also relates to a

Table rack kit comprising the previously described

Components for the construction of modular composable

Table frame, so at least two trough-shaped

Profile body, at least two brackets, at least two head pieces, at least two table legs, preferably

equipped with drive motors, as well as the necessary

Wiring and the electronics.

The table frame according to the invention is characterized by excellent stability. Therefore, in contrast to known racks, it does not require a so-called crossbeam, i. no stabilizing connection of the table legs or lower ones

Sections of the lifting columns, which indicate the legroom of the

Would restrict users undesirably. In practice, the tables showed with the

Frame according to the invention in the pendulum hammer test according to the standards mentioned above excellent results for

Deflection and vibration damping. A preferred one

Embodiment of the invention is illustrated in the drawings by way of non-limiting example and in

Described in more detail below. In the detailed

Description is made to the accompanying drawings, which form a part of this and in which

Illustrative of specific embodiments are shown in which the invention may be practiced. In this regard, directional terminology such as "top", "bottom", "front", "back", "front", "back", etc. in Reference is made to the orientation of the figure (s) described. Because components of embodiments can be positioned in a number of different orientations, the directional terminology serves for

Illustration and is in no way limiting. It should be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. The following detailed description is not to be construed in a limiting sense. In the context of this description, the terms "connected",

"Connected" and "integrated" used to describe both direct and indirect connection, direct or indirect connection, and direct or indirect integration. In the figures, identical or similar elements with identical

Provided reference numerals, as far as this is appropriate.

The illustrations in the figures are essentially to scale. To illustrate details, however, certain areas may be shown exaggeratedly large for those skilled in the art. In addition, the drawings may be simplistically simplified and do not include every detail that may be present in the practice.

Show it:

Figure 1: a partial perspective view of a

table frame according to the invention mounted under a table top; and

FIG. 2: an exploded perspective view of the

Table frame according to FIG. 1.

The Cartesian coordinate system drawn in FIG. 1 indicates the directions in which the X-axis represents the longitudinal, the Y-axis, the transverse direction and the Z-axis the height, Table or system indicates. FIG. 1 shows a table frame according to the invention.

The illustrated in the figures modular composite table frame according to the invention consists essentially of two as tub profiles 20, 40 formed profile body, two height-adjustable lifting columns 60, 80, two brackets 10, 13 and two headers 14, 15. All the above

Components described are formed as folded steel profiles with a wall thickness of 2.5 mm. The details of the structure of the components are each described only for one component in order not to overload the figures and because the component are constructed in pairs accordingly.

Each trough profile 20, 40 is channel-like

comprising a lower horizontal leg 21 which preferably translates parallel downwards through the

Table frame defined support plane for the table top 16 extends and from which in each case at right angles and parallel to each other two vertical legs 22, 23 extend, which at the upper free ends at right angles to the

Vertical legs after projecting into the outside mounting flanges 24, pass, which serve to mount on the table top 16 and increase the longitudinal stiffness.

To further increase the longitudinal stiffness, the brackets 10, 13 on both sides of the outer sides of the vertical leg 22, 23, which are aligned in the installed position; 42 of the

Tub profiles 20, 40 placed so that these brackets 10, 13 with hook ends on the hook portions 11 in

Positioning openings 26 in the tub profiles 20, 40 engage, the present case on both sides in the

Horizontal leg 21 of the tub profile 20, 40 in

uniform intervals extending in the longitudinal direction

are provided to various installation situations or

To allow sizes. The brackets 10, 13 nestle in Installation position on the outside overlapping the VertikalSchenkel 22, 23 of the profile body 2, 4 and overlap with a first hook portion 11, the edge between vertical leg 22, 23 and horizontal leg 21 of the tub body 20, 40 at one end and with a second Aufsetzflansch 12, the edge between Vertical leg 22, 23 and the

Mounting flanges 24, 25 of the tub profiles 20, 40. Now, the wood or fastening screws through the

Aufsetzflansch 12 of the brackets 10, 13 and the

Mounting flanges 24, 25 of the profile body 20, 40 in the

Bottom of the table top 16 are screwed.

A possible distance between the two coaxially attached to the head of the table tray profiles 20, 40 can be bridged over a correspondingly adapted intermediate element (not shown), which geometrically to the

Trough profiles is adjusted, but no supporting function must take over. In an alternative embodiment, the profile body or tub profiles 20, 40 in

Mounting position to each other or are mutually receivable or formed telescopically.

Each lifting column 60, 80 in the present case consists of three

telescopically telescoping rectangular profiles, of which the first and largest is connected to the bottom of the table foot, in which a second center profile is taken relatively movable with an outer dimension corresponding to the inner dimension of the first profile in which in turn a third profile is arranged relatively movable, its outer dimension in turn adapted to the inner dimension of the second profile. At the upper end of the third profile is transverse to the lifting column 60, 80 extending a box-like motor housing 6a, 8a attached to receive an electric motor. The built-in electric motor drives over

Worm gear on a jaw clutch, which is a ersteckende in the lifting column spindle for longitudinal adjustment of Lifting column and thus height adjustment of the table rotates.

On the outside in the box-like motor housing two, in total four Allen screws are provided on both sides. The Allen screws on the outer long sides of the

Box-like motor housing 61, 81 are now inside L-shaped guide slots 27, 28 in the

Vertical legs 22, 23 of the profile body 20, 40th

trapped. Each of these guide slots 27, 28 consists of a recess in the vertical leg 22, 23, which includes a closed end, so as a blind recess

is trained. In the present embodiment, each guide slot 27, 28 substantially comprises an L-shaped geometry with a vertical section and a horizontal section extending transversely thereto. During assembly, the tub profiles 20, 40 with the vertical legs 22, 23; 42 in alignment with the Allen screws on the

Motor housing 61, 81 and then placed in relation to the stationary motor housings 61, 81 to the front end

moved until the Allen screws are clamped in the conically tapered ends of the horizontal sections of the guide slots 27, 28. This Klemmsitzt is then through

Screwing the transversely extending head pieces 14, 15 screwed to the outside of the motor housing 61, 61, and the protruding from the motor housing Allen screws are in the conically tapered horizontal sections of the guide slots 27, 28 endverspannt.

If this table frame is to be used for another table with different dimensions, the individual elements can be removed from the underside of the table top 16 and used for the other table. For different depth tables only different sized head pieces 14, 15 are required as variants. The other components are standardized but the same. In an advantageous embodiment, the tub profiles 20, 40 set in a packaging unit one behind the other, the brackets 10, 13 and the head pieces 14, 15 in the

Tub profiles 20, 40 are inserted. The sum of the length of both tub profiles 20, 40 corresponds to the length of the

Clamps 10, 13. Advantageously, the measure of 1.20 m of the entire length of the packaging unit is not

exceeded, which allows a particularly efficient stacking and transporting the packaging units. In a preferred embodiment, the brackets 10, 13 have a length of 1.00 m and each tub profile one

Overall length of 0.50 m. Thus, table racks for table tops 20 in a range of 1.20 m to 2.50 m can be produced.

Another embodiment, not shown, provides a trough profile 20, 40 in one piece. here we can

Guide slots 27, 28 in a central area of the

Tub profiles 20, 40 introduced when a table frame to be created with only one lifting column. Another

Alternative offers a trough profile 20, 40 in one piece with guide slots 27, 28 in the respective end regions according to the figure 1 and Figure 2, when a

Two-column table frame of a predetermined size

to be produced.

The subject matter of the present invention results not only from the subject matter of the individual claims, but also from the combination of the individual claims with one another. All the information and features contained in the documents, including the abstract,

in particular the spatial formation shown in the drawings are claimed as essential to the invention, as far as they are new individually or in combination over the prior art.

Table frame for a table

LIST OF REFERENCE NUMBERS

20 trough profile

21 horizontal legs

22 vertical legs

23 vertical legs

24 mounting flange

25 mounting flange

26 positioning opening

27 guide slide

28 guidance course

40 tub profile

41 horizontal legs

42 vertical legs

60 lifting column

61 motor housing

80 lifting column

81 Motor housing

10 bracket

11 hook section

12 mounting flange

13 bracket

14 head piece

15 head piece

16 table top

Claims

Table frame for a table claims

1. Table frame for carrying a table top of a

Table at a working height, which is designed for attachment of table legs and as a modular

connectable plug-in system is formed, wherein the table frame comprises at least two profile body, which are connected to each other via at least two brackets (10, 12), thereby marked, that the

Clamps (10, 12) are formed for over or encompassing edges of the profile body.

2. Table frame according to claim 1, characterized in that the brackets (10, 12) in the profile body

einhakbar are formed.

3. Table frame according to claim 1 or 2, DADURCH

CHARACTERIZED that the profile body are formed trough or channel-shaped.

4. Table frame according to claim 2 or 3, DADURCH

CHARACTERIZED that the brackets (10, 12) are about twice as long as the profile body.

5. Table frame according to one of the preceding claims, characterized in that this comprises transverse profiles for the realization of the transverse rigidity.

6. Table frame according to claim 5, characterized in that the transverse profiles are formed as head pieces.

7. Table frame according to claim 5, characterized in that a head piece (14, 16) with a profile body and a table base is connectable.

8. Table frame according to one of the preceding claims, characterized in that the profile body is designed to receive the table base.

9. Table frame according to one of the preceding claims, characterized in that the connecting means acting between the components clamp the components in the installed position at least partially against each other.