EP3189748B1 - Height adjustable frame parts for a piece of furniture, in particular a height-adjustable table leg, and height-adjustable single or multi-column table frame - Google Patents

Description

The present invention relates to a, in particular stepless, height-adjustable frame part for a piece of furniture, in particular a height-adjustable table leg comprising at least two telescopically axially telescoping rectangular telescopic elements and a Höhenverstellmechanismus in the telescopic elements, wherein the height adjustment mechanism comprises a threaded rod extending in the telescopic elements, wherein the threaded rod is guided in a thread of a threaded element in a lower of the telescopic elements, a lower end of the threaded rod is free and an upper end of the threaded rod in a bearing in a receiving element in an upper of the telescopic elements from the receiving elements upwards outstandingly rotatable about its longitudinal axis is, and a, in particular stepless, height-adjustable single or multi-column table frame, such. B: a (sitting / standing) work table. The height of the frame part is in principle equal to the length of the frame part. Normally, the longitudinal axis of the threaded rod coincides with the longitudinal axis of the telescopic elements or runs parallel thereto.

Furthermore, the present invention relates to a frame part for a piece of furniture, in particular a height-adjustable table leg, comprising at least two telescopically axially telescoping rectangular telescopic elements and a Höhenverstellmechanismus in the telescopic elements, wherein the height adjustment mechanism comprises a threaded rod extending in the telescopic elements, wherein the threaded rod in a thread of a threaded member is guided in a lower of the telescopic elements, a lower end of the threaded rod is free and an upper end of the threaded rod in a bearing in a receiving element in an upper of the Telescope elements from the receiving elements upwards is outstandingly mounted rotatably about its longitudinal axis.

The following is the example of a height-adjustable table leg or a height-adjustable table frame the underlying problem of the present invention will be described. For example, from the German utility model DE 20 2012 009 673 U1 a height-adjustable table leg and a height-adjustable table frame known. The known table leg has two telescopically axially telescoping rectangular telescopic elements and a Höhenverstellmechanismus in the telescopic elements, wherein the height adjustment mechanism comprises a threaded rod which extends in the telescopic elements in the longitudinal direction thereof, wherein the threaded rod in a thread of a threaded member in the lower of the two telescopic elements is, a lower end of the threaded rod is free and an upper end of the threaded rod in a bearing in a receiving element in the upper of the two telescopic elements from the receiving element upwards outstandingly rotatable about its longitudinal axis.

The well-known table leg and the well-known table frame are indeed inexpensive to produce, but should be even cheaper to produce.

The present invention is therefore the object of developing height-adjustable frame parts of the aforementioned types to the effect that they are even more cost-effectively.

According to the invention this object is achieved according to a first aspect by a height-adjustable frame member for a piece of furniture, in particular a height-adjustable table leg, comprising at least two telescopically axially telescoping rectangular telescopic elements and a height adjustment mechanism in the telescopic elements, wherein the height adjustment mechanism comprises a threaded rod extending in the telescopic elements wherein the threaded rod is guided in a thread of a threaded member in a lower of the telescopic members, a lower end of the threaded rod is free and an upper end of the threaded rod in a bearing in a receiving element in an upper of the telescopic elements from the receiving elements up to excellent its longitudinal axis is rotatably mounted, characterized in that the receiving element is held positively in the upper telescopic element.

Furthermore, this object is achieved according to a second aspect by a height-adjustable frame part for a piece of furniture, in particular a height-adjustable table leg, comprising at least two telescopically axially telescoping rectangular telescopic elements and a height adjustment mechanism in the telescopic elements, wherein the height adjustment mechanism comprises a threaded rod extending in the telescopic elements wherein the threaded rod is guided in a thread of a threaded member in a lower of the telescopic members, a lower end of the threaded rod is free and an upper end of the threaded rod in a bearing in a receiving element in an upper of the telescopic elements from the receiving elements upwards outstanding about its longitudinal axis is rotatably mounted, and further a lower end of the lower telescopic element is closed with a closure plate, characterized in that the closure plate in the lower end of the lower Telesk opelements is held positively.

According to a third aspect, this object is achieved by a height-adjustable frame part for a piece of furniture, in particular a height-adjustable table leg, comprising at least two telescopically axially telescoping rectangular telescopic elements and a height adjustment mechanism in the telescopic elements, wherein the height adjustment mechanism comprises a threaded rod extending in the telescopic elements, wherein the threaded rod is guided in a thread of a threaded member in a lower of the telescopic elements, a lower end of the threaded rod is free and an upper end of the threaded rod in a bearing in a receiving element in an upper of the telescopic elements from the receiving elements upwards outstanding about its longitudinal axis is mounted, characterized in that the threaded element is received in a two-part holder, which is held in the lower telescopic element by positive engagement.

In addition, the present invention provides a height-adjustable single or multi-column table frame, comprising at least one frame part and a drive device, in particular an electric motor, for driving the height adjustment mechanism of the at least one frame part.

In the height-adjustable frame part according to the first aspect it can be provided that the receiving element is held in a form-fitting manner in the upper edge of the upper telescopic element.

In particular, it may be provided that the receiving element has a receiving plate with at least one, preferably in the plane of the receiving plate, laterally projecting nose and the upper edge of the upper telescopic element has a recess for positive reception of at least one nose.

Conveniently, the receiving element on two opposite sides of the receiving plate in each case one of the receiving plate substantially at right angles extending legs, each having at least one opening into which a respective tab is positively bent in an associated side wall of the upper telescopic element. By bending over the tabs, the receiving element is additionally held positively. In particular, it can be clamped.

Conveniently, the bearing is held by means of a hinged in the receiving element bearing holder in the receiving element.

According to a further particular embodiment of the present invention, a lower end of the lower telescopic element is closed by means of a closure plate and the closure plate is held in a form-fitting manner in the lower end of the lower telescopic element.

In the frame part according to the second aspect of the present invention can be provided that the closure plate is held in a form-fitting manner in the lower edge of the lower telescopic element.

In particular, it may be provided that the closure plate has at least one, preferably in the plane of the closure plate, laterally projecting nose and the lower edge of the lower telescopic element has a recess for positively receiving the at least one nose.

Advantageously, the underside of the closure plate is supported by at least one tab bent substantially inwardly at right angles to a side wall of the lower telescopic element.

According to a further particular embodiment of the present invention, the threaded element is received in a two-part holder, which is held in the upper telescopic element by positive engagement.

In the frame part according to the third aspect of the present invention, it may be provided that the two parts of the holder are connected by a plug connection.

Conveniently, each of the two parts of the holder on at least one outer side a recess into which a tab is bent in an associated side wall of the upper telescopic element.

Furthermore, it is expediently provided in the multi-column table frame that the at least one frame part are two table legs and the multi-column table frame one, in particular horizontal, supported on the two legs leg crosspiece of a, preferably rectangular, hollow profile and at least one attached to or on the crossbar or thus in one piece trained plate carrier for a table top.

Finally, the drive means for the two legs are favorably arranged in the cross-beam.

The present invention is based on the surprising finding that by at least a partial waiver of joining techniques such. B. welding, and instead use of z. B. forming techniques, height adjustable frame parts can be produced more cheaply. Of course, this also makes itself felt in the price for height-adjustable single or multi-column table racks. In addition, the frame parts also easier to assemble.

Figur 1

eine Explosionsansicht von einer Seite eines Tischgestells gemäß einer besonderen Ausführungsform der vorliegenden Erfindung;

Figur 2

zwei Seitenansichten und eine Draufsicht von einem kompletten höhenverstellbaren Tischbein des Tischgestells von Figur 1;

Figur 3

eine Seitenansicht von dem kompletten Tischbein von Figur 2 teilweise weggebrochen;

Figur 4

den oberen Bereich des in Figur 3 gezeigten Tischbeins im Detail;

Figur 5

das obere Ende des Tischbeins von Figur 2 während der Montage eines Aufnahmeelements;

Figur 6

das obere Ende des Tischbeins von Figur 2 nach Einsetzen des in der Figur 6 gezeigten Aufnahmeelements;

Figur 7

die Montage eines Lagers in einem Lagerhalter;

Figur 8

die Montage des in dem Lagerhalter von Figur 8 angeordneten Lagers in dem in Figur 6 gezeigten Aufnahmeelement;

Figur 9

die Aufnahme eines Gewindeelements in einem Halter;

Figur 10

die Aufnahme des Halters mit dem Gewindeelement von Figur 9 in dem unteren Teleskopelement des Tischbeins von Figur 2;

Figur 11

das obere Ende des unteren Teleskopelements mit montierter Gewindestange teilweise weggebrochen;

Figur 12

die Montage des oberen Endes der Gewindestange in dem Lager in dem oberen Teleskopelement;

Figur 13

die Montage einer Verschlussplatte in dem unteren Ende des unteren Teleskopelements;

Figur 14

das untere Ende des unteren Teleskopelements mit fertig montierter Verschlussplatte; und

Figur 15

die Montage eines Tischfußes an der Unterseite des unteren Teleskopelements.

Further features and advantages will become apparent from the appended claims and from the following description in which several embodiments are explained in detail with reference to the schematic drawings. Showing:

FIG. 1

an exploded view from one side of a table frame according to a particular embodiment of the present invention;

FIG. 2

two side views and a plan view of a complete height-adjustable table leg of the table frame of FIG. 1 ;

FIG. 3

a side view of the entire table leg of FIG. 2 partially broken away;

FIG. 4

the upper area of the in FIG. 3 shown table legs in detail;

FIG. 5

the upper end of the table leg of FIG. 2 during assembly of a receiving element;

FIG. 6

the upper end of the table leg of FIG. 2 after inserting in the FIG. 6 shown receiving element;

FIG. 7

the mounting of a warehouse in a storekeeper;

FIG. 8

the mounting of the in the storekeeper of FIG. 8 arranged bearing in the in FIG. 6 shown receiving element;

FIG. 9

the inclusion of a threaded element in a holder;

FIG. 10

the inclusion of the holder with the threaded element of FIG. 9 in the lower telescopic element of the table leg of FIG. 2 ;

FIG. 11

the upper end of the lower telescopic element with mounted threaded rod partially broken away;

FIG. 12

the mounting of the upper end of the threaded rod in the bearing in the upper telescopic element;

FIG. 13

the mounting of a closure plate in the lower end of the lower telescopic element;

FIG. 14

the lower end of the lower telescopic element with fully assembled closure plate; and

FIG. 15

the mounting of a table base on the underside of the lower telescopic element.

FIG. 1 shows a side of a table frame 10, more precisely a Mehrsäulentischgestellgestells with two height-adjustable columns or table legs, one of which in the FIG. 1 to see and is provided with the reference numeral 12. The table frame 10 further comprises a horizontal crossbar 14 of a rectangular box section made of metal, which is supported at its two ends by a respective table leg, of which only the table leg 12 can be seen. At the bottom of the table leg 12 is a table leg 16 transverse to the longitudinal direction of the table leg 12. The table leg 16, also called runner, is by means of a through a centrally located in the longitudinal direction of the table base 16 lower opening 18 (see FIG. 15 ) insertable pressure plate 20 via two screws 22 which are screwed into two corresponding threaded holes 24 in a lower closure plate 26 on the lower end side of the table leg 12, attached to the table leg 12.

How to join in the FIGS. 2 to 4 . 11 and 12 results in the table leg 12, a height or Längenverstellmechanismus with a threaded rod (spindle) 28, of which an upper end 30 protrudes at the top of the table leg 12 upwards. In the assembled state, the upper end 30 projects through an opening (not shown) in the bottom at a respective end of the crossbar 14 in the same to engage with a respective electric motor 32 disposed therein and from the respective electric motor by means of a motor control (not shown) to be driven. The engine control can also be arranged in the cross-beam 14, for example in the middle in the longitudinal direction of the cross-beam.

As in combination with the FIGS. 2 to 7 and 12 results, the longitudinal ends of the crossbar 14, of which only one is seen here and designated by the reference numeral 34, not connected to the table leg 12 on impact, but they are inserted into the upper end 35 of the table leg 12. More specifically, the table leg 12 has two telescopically axial telescoping rectangular telescopic elements 36 and 38 having a rectangular cross-sectional profile and at the upper telescopic element 36, in which the lower telescopic element 38 is slidably disposed, at the upper end 40 two opposite, in the present example, longer side walls 42 and 44 cut out, so that the two arranged at right angles side walls 46 and 48 project relative to the side walls 42 and 44 upwards and the crosspiece 14 is received and held due to their smaller transverse dimension between the two side walls 46 and 48. In the side walls 46 and 48, which are cut like a ramp, there are two through holes 50 and 52 for two screws 54, which can be screwed into two corresponding threaded holes 56 and 58 in the two side walls 60 and 62 of the crossbar 14 to the upper end 40 of the upper telescopic element 36 and thus to be able to connect the table leg 12 with the crossbeam 14.

In the FIG. 1 Also shown is a plate carrier 64 for a tabletop (not shown) which may also be attached via the screws 54 to the longitudinal end 34 of the crossbar 14.

FIGS. 9 to 11 For this purpose, a two-part holder 66 is provided, the two parts 66a and 66b, including or encapsulating a threaded element 68 with a corresponding internal thread, which in principle has the function of a spindle nut, can be put together. In the mated state, the holder 66 is inserted into the upper end 70 of the lower telescopic element 38 and by means of two in two opposite side walls 72 and 74 of the lower telescopic element 38 formed tabs 76 and 78 by bending the same inward and in corresponding recesses, of which only one seen and designated by the reference numeral 80, fixed in the holder 66. Thereafter, the threaded rod can advantageously be led out from below into the lower telescopic element 38 and into and through the threaded member 68 by rotating the threaded rod 28 with its upper end 30 upwards.

As in FIG. 12 shown, the lower telescopic element 38 is then inserted from below into the upper telescopic element 36 and pushed up until the upper end of the threaded rod 28 is guided by a bearing 84. The bearing 84 may be a radial bearing.

The Figures 3 and 4 show the threaded rod 28 in a state in which its lower end 86, which is located in the lower telescopic element 38, the upper end 30 of the threaded rod 28 is rotatably mounted in the bearing 84 and the threaded rod 28 between them - in this example in the longitudinal direction of the table leg 12 extending - is guided in the threaded member 68. The threaded member 68 is fixedly disposed in the lower telescopic element 38.

The FIGS. 5 to 8 now show how the bearing 84 is mounted in the upper telescopic element 36. For this purpose, first a receiving plate 88 with at two opposite side edges 90 and 92 laterally projecting lugs 96 and 98 and at the other two side edges at right angles upwardly extending legs 100 and 102 of so inserted into the upper end of the upper telescopic element 36 from above so that the lugs 96 and 98 positively fit into corresponding recesses 104 and 106 in the upper edge 108 of the upper telescopic element 36. In addition, the legs 100 and 102 are then arranged parallel to the legs 46 and 48 and adjacent thereto from the inside. In the legs 46 and 48 of the upper telescopic member 36, a tab 110 is formed in each case, which are bent inwardly into a corresponding opening 112 in the legs 100 and 102, thereby the receiving plate 88 in the upper edge 108 of the upper telescopic member 36 to form fit hold and clamp.

The receiving plate 88 has in this example a central opening 114 for the passage of the upper end 30 of the threaded rod 28. Furthermore, it has four circumferentially around the opening 114 at a distance of 90 ° to each other arranged openings 116 for hooking a bearing holder 118 for the bearing 84. For this purpose, the bearing holder 118 has four outwardly biased elastic hooks 120. After arranging the bearing 84 in a case in this case circular bearing receptacle 122 in the bearing holder 118 so the bearing 84 can hang from below in the receiving plate 88 and can thereafter, as shown in the FIG. 12 is shown, the upper end 30 of the threaded rod 28, which is guided in the lower telescopic element 38, passed through the bearing 84 upwards and secured by a washer 124 and a locking ring 126.

In the Figures 13 and 14 is still shown how the closure plate 26 is secured or secured in the lower end of the lower telescopic element 38. The closure plate 26 has for this purpose on two opposite side edges 128 and 130 each two spaced apart, laterally projecting lugs 134 and 136. The lower edge 138 of the lower telescopic element 38 has corresponding recesses 140 and 142 for the positive reception of the lugs 134 and 136. In addition, between each two recesses 140 and 142 each have a tab 144 down. When the closure plate 26 has been placed with their lugs 134 and 136 in the recesses 140 and 142, the closure plate 26 is additionally held by positive bending or bending of the tabs 144 in the lower end of the lower telescopic element 38 in addition form-fitting manner.

Although in the foregoing description the upper telescopic element is the outer telescopic element and the lower telescopic element is the inner telescopic element the inner telescopic element, in principle the arrangement can also be reversed.

The features of the invention disclosed in the foregoing description, in the drawings and in the claims may be essential both individually and in any desired combinations for the realization of the invention in its various embodiments. <U> REFERENCE LIST </ u> 10 table support 72 side walls 12 Table leg 74 side walls 14 crossbeam 76 tabs 16 Table base 78 tabs 18 opening 80 recess 20 printing plate 84 camp 22 screw 86 The End 24 threaded holes 88 mounting plate 26 closing plate 90 margins 28 threaded rod 92 margins 30 The End 96 nose 32 electric motor 98 nose 34 longitudinal end 100 leg 36 telescopic elements 102 leg 38 telescopic elements 104 recesses 40 The End 106 recesses 42 leg 108 edge 44 leg 110 tabs 46 leg 112 opening 48 leg 114 opening 50 Through holes 116 openings 52 Through holes 118 storekeeper 54 screw 120 hook 56 threaded holes 122 bearing seat 58 threaded holes 124 washer 60 leg 126 circlip 64 plate carrier 130 margins 66 holder 134 nose 66a parts 136 nose 66b parts 138 edge 68 threaded element 140 recesses 70 The End 144 tabs

Claims (16)

1. Height-adjustable frame part for a piece of furniture, in particular a height-adjustable table leg (12), comprising

   - at least two rectangular telescopic elements (36, 38) which can slide axially one inside the other in a telescopic manner, and

   - a height-adjustment mechanism in the telescopic elements (36, 38), wherein the height-adjustment mechanism comprises a threaded rod (28) which extends in the telescopic elements, wherein the threaded rod (28) is guided in a thread of a threaded element (68) in a lower one (38) of the telescopic elements (36, 38), a lower end (86) of the threaded rod (28) is free and an upper end (30) of the threaded rod (28) is mounted in a bearing (84) in a receiving element in an upper one (36) of the telescopic elements (36, 38) in such a way that it can rotate about the longitudinal axis of said rod so as to project upwards out of the receiving element,

   characterized in that
   the receiving element is held in the upper telescopic element (36) in a form-fitting manner.
2. Frame part according to Claim 1, wherein the receiving element is held in a form-fitting manner in the upper edge of the upper telescopic element (36).
3. Frame part according to Claim 1 or 2, wherein the receiving element has a receiving plate (88) with at least one lug (96, 98) which projects laterally, preferably in the plane of the receiving plate, and the upper edge (108) of the upper telescopic element (36) has a cutout (104, 106) for receiving the at least one lug (96, 98) in a form-fitting manner.
4. Frame part according to Claim 3, wherein the receiving element has, on two opposite sides of the receiving plate (88), a respective leg (100, 102) which extends substantially at a right angle from the receiving plate (88) and which has in each case at least one opening (112) into which a respective tab (110) in an associated side wall (46 or 48) of the upper telescopic element (36) is bent over in a form-fitting manner.
5. Frame part according to one of the preceding claims, wherein the bearing (84) is held in the receiving element by means of a bearing holder (118) suspended in the receiving element.
6. Frame part according to one of the preceding claims, wherein a lower end of the lower telescopic element (38) is closed by means of a closure plate (26), and the closure plate (26) is held in a form-fitting manner in the lower end of the lower telescopic element (38).
7. Frame part according to Claim 6, wherein the closure plate (26) is held in a form-fitting manner in the lower edge (144) of the lower telescopic element (38) .
8. Frame part according to Claim 7, wherein the closure plate (26) has at least one lug (134, 136) which projects laterally, preferably in the plane of the closure plate (26), and the lower edge (144) of the lower telescopic element (38) has a cutout (140, 142) for receiving the at least one lug (134, 136) in a form-fitting manner.
9. Frame part according to one of Claims 6 to 8, wherein the lower side of the closure plate (26) is held by at least one tab (144) which is bent over inwardly substantially at a right angle to a side wall of the lower telescopic element (38).
10. Frame part according to one of the preceding claims, wherein the threaded element (68) is received in a two-part holder (66) which is held in the lower telescopic element (38) by a form fit.
11. Height-adjustable frame part for a piece of furniture, in particular a height-adjustable table leg (12), comprising

    - at least two rectangular telescopic elements (36, 38) which can slide axially one inside the other in a telescopic manner, and

    - a height-adjustment mechanism in the telescopic elements (36, 38), wherein the height-adjustment mechanism comprises a threaded rod (28) which extends in the telescopic elements (36, 38), wherein the threaded rod (28) is guided in a thread of a threaded element (68) in a lower one (38) of the telescopic elements (36, 38), a lower end (86) of the threaded rod (28) is free and an upper end (30) of the threaded rod (28) is mounted in a bearing (84) in a receiving element in an upper one (36) of the telescopic elements (36, 38) in such a way that it can rotate about the longitudinal axis of said rod so as to project upwards out of the receiving element,

    characterized in that
    the threaded element (68) is received in a two-part holder (66) which is held in the lower telescopic element (38) by a form fit.
12. Frame part according to Claim 10 or 11, wherein the two parts (66a, 66b) of the holder (66) are connected by a plug connection.
13. Frame part according to one of Claims 10 to 12, wherein each of the two parts (66a, 66b) of the holder (66) has, on at least one outer side, a cutout (80) into which a tab (76) in an associated side wall (72, 74) of the upper telescopic element (36) is bent over.
14. Height-adjustable single- or multi-column table frame, comprising at least one frame part according to one of the preceding claims and a drive device, in particular an electric motor (32), for driving the height-adjustment mechanism of the at least one frame part.
15. Single- or multi-column table frame according to Claim 14, wherein the at least one frame part is constituted by two table legs (12), and the multi-column table frame has an, in particular horizontal, crossmember (14) supported on the two table legs and consisting of a, preferably rectangular, hollow profile, and has at least one tabletop carrier (64) for a tabletop, which carrier is fastened on top of or on the crossmember (14) or formed in one piece therewith.
16. Single- or multi-column table frame according to Claim 15, wherein the drive devices for the two table legs are arranged in the crossmember (14).

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