WO2014082715A1

WO2014082715A1 - Telescopic arrangement of parts, for example a table leg

Info

Publication number: WO2014082715A1
Application number: PCT/EP2013/003481
Authority: WO
Inventors: Hellmuth Moll; Werner KRÖNER
Original assignee: Hellmuth Moll
Priority date: 2012-11-30
Filing date: 2013-11-19
Publication date: 2014-06-05
Also published as: DE202012012898U1; DE102012023401A1

Abstract

The invention relates to a telescopic arrangement of parts with an elongated design, for example a table leg, comprising a profiled guide (14) and a profiled telescope section (19), which is mounted in the profiled guide (14) in an adjustable manner in the longitudinal direction and which can be moved out of the profiled guide (14) in an extending direction and into the profiled guide (14) in a retracting direction, and comprising locking means with which the profiled telescope section (19) can be locked in a fixed position after assuming a desired position relative to the profiled guide (14). An energy storing device (27) with at least one energy store (28) is integrated into the arrangement of parts (11), said energy store being chargeable with energy using the kinetic energy generated while the profiled telescope section (19) is retracted, wherein the energy can be used to generate a subsequent extending movement.

Description

Telescopic part arrangement, for example table leg

The invention relates to a telescopic part arrangement elongated shape, for example table leg, with a guide profile and a longitudinally adjustable mounted on the guide profile telescopic profile, which is out in the extension of the guide profile and in the direction of retraction in the guide profile can be moved, and with Arretierungs-, with where the telescopic profile can be locked in position after taking a desired relative position with respect to the guide profile.

Telescopic parts arrangements of this type can be used in many fields, especially in furniture, when an adjustment of the respective piece of furniture in height is desired.

Height-adjustable furniture parts, especially tables, are increasingly in demand and used, as society is changing to a more sedentary and less mobile community. In particular, the number of office workplaces with seated work on a worktable has increased significantly over the years. The long-sitting activity is known to cause many problems, for example, here are the increase in back problems. It has long been known to use height-adjustable furniture parts, especially tables, the table top can be adjusted so that the user can switch between sitting and standing activity.

For height-adjustable tables, it is known to accommodate a torsion spring in a arranged between two legs table synchronous rod, which ensures the synchronization in the movement of the movement profiles, which is stretched during the retraction movement and then provides the stored spring energy when extending available.

However, such tables have a limited field of application, as always a synchronous rod between two legs must be used, in which then an expensive and heavy torsion spring is to be accommodated. Overall, such tables are very bulky and have a significant weight.

The object of the invention is therefore to provide a telescopic part assembly of the type mentioned, which allows for use in a table, a tool or the like a cost-effective, compact and easy to handle height adjustment.

This object is achieved by a telescopic part arrangement with the features of independent claim 1. Further developments of the invention are shown in the subclaims.

The telescopic part arrangement according to the invention is characterized in that an energy storage device is integrated into the parts arrangement with at least one energy store, which can be charged with energy by the kinetic energy generated during retraction of the telescopic profile, the energy is usable for the generation of a subsequent extension movement.

The energy storage device is thus integrated into the parts arrangement, whereby a particularly compact design can be achieved. If the telescopic part assembly used for example for a table, so the telescopic part assembly is thus designed as a table leg, offers in comparison to the aforementioned prior art with the clamped between two legs table torsion a broader scope. Here you can also adjust the height of tables or desks with only one table leg. The energy saving device is thus accommodated compactly within the parts arrangement, whereby weight and volume can be saved. Due to the compact design of the telescopic part assembly with energy storage device, for example, transport costs can be saved, which have a significant impact on the price with such telescopic parts arrangements equipped furniture parts, equipment, etc.

By the energy storage device with at least one energy storage, which provides the energy stored during retraction energy when extending again, it is possible that the telescope part with the coupled component, such as a tabletop, automatically or almost automatically with low support of the user extends. In this case, the storage capacity of the energy store can be adapted individually to the component coupled to the telescope profile, for example to the weight of a tabletop. Furthermore, expected loadings of such a tabletop can be taken into account, so that even a relatively heavily loaded tabletop automatically or almost automatically adjusts to a higher position can be. Such a weight adjustment is also useful, for example, in children's desks, so that the height adjustment can also be carried out by the child himself and even in the case of a loaded desk in a simple manner.

The locks ensure that the telescopic profile can be locked at the desired height. The telescopic profile is expediently guided on the base profile in such a way that it can be adjusted steplessly or with delicate locking and can therefore be locked in the desired height position. This, in turn, makes sense in children's / student's desks, as children are still in a growth phase and consequently, optimal seating and standing positions change.

In a development of the invention, the energy store is a mechanical energy store.

In a particularly preferred manner, the mechanical energy storage at least one spring element, whereby the kinetic energy can be stored in the form of spring energy. The mechanical energy storage could therefore also be referred to as spring storage. As spring element, all known types of springs can be used, but the use of a coil spring is preferred.

Alternatively or additionally, it is possible for the energy store to be a non-mechanical energy store, for example a fluidic or electrical energy store. In the case of an electrical energy storage, it would be conceivable that a battery is charged by means of the kinetic energy generated during retraction of the telescopic profile, the stored electrical energy then an electric motor is provided which takes over or supports the extension movement of the telescopic profile.

In a development of the invention, the energy storage device has motion conversion means for implementing the movement of the linear retraction movement of the telescopic profile into a movement for charging the energy store. In the case of a mechanical energy storage with spring element, the linear retraction of the telescopic profile can thus be converted into a movement for tensioning the spring element. In the case of a spiral spring, the movement for tensioning the spring element may, for example, be a rotational movement over which the spiral spring can be tensioned.

In a particularly preferred manner, the movement conversion means comprise a transfer gear, with gear parts, of which at least one of the base profile and at least one of the telescopic profile is assigned. The base profile side gear parts can thus be fixedly secured to the base profile, while the telescopic profile side gear parts with the movement of the telescopic profile are movable.

The transfer gear is particularly preferably a gear transmission, wherein preferably one of the gear parts is designed as a pinion and one of the gear parts as a rack interacting with the pinion. However, it is also possible to use other types of transfer gears, such as belt transmissions or the like.

It is possible that the pinion on the telescopic profile and the rack are arranged on the guide profile.

In a particularly preferred manner, the pinion is rotatably mounted by means of bearing means on the telescopic profile and is at the Li near movement of the telescopic part on the engagement in the rack in rotational or rotational movement displaceable. In the case of a spring element designed as a spiral spring, it is thus possible that it is tensioned due to the rotational movement generated by the rack / pinion combination during retraction of the telescopic tube.

It is possible that the bearing means a pinion shaft which is rotatably connected to the pinion detachably connectable and a non-rotatably mounted on the telescopic profile bearing sleeve in which the

Pinion shaft is rotatably mounted, have. The pinion shaft is therefore rotatable with the pinion, while the bearing sleeve is fixed non-rotatably on the telescopic profile. It is possible that the pinion shaft is inserted through the bearing sleeve and in the transverse direction through the telescopic profile.

In a further development of the invention, the telescopic profile is designed as a hollow profile with a hollow chamber. Conveniently, this is a profile of metal material, for example light metal material, in particular aluminum. The telescopic profile may be formed, for example, as an extruded aluminum profile. The combination of hollow section and light metal gives a particularly low weight of the telescopic profile. A low weight of the telescopic profile is important because in the design of the energy storage, the weight of the telescopic profile must also be taken into account.

It is possible that the base profile is designed as a U-profile. In this case, the telescopic profile is thus displaceably mounted in the U-profile-like base profile.

In order to ensure a smooth retraction or extension of the telescopic profile from the base profile, it is expedient to use between the telescope profile and the base profile. For this purpose, for example, rolling elements, in particular guide rollers which are in particular rotatably mounted on the telescopic profile and roll on a guide rail formed on the base profile during the movement of the telescopic profile are suitable.

In a further development of the invention, the energy store is arranged in the hollow chamber of the hollow profile, wherein preferably the energy storage, in particular the spring element, is accommodated in a particular can-like storage housing, which is arranged in the hollow chamber of the hollow profile.

The storage housing is suitably rotatably connected to the pinion and is rotated during the rotation of the pinion with.

In the case of a spring element in the form of a spiral spring, it is therefore possible to store these on the one hand on the rotatable storage housing and on the other hand on the non-rotatable bearing sleeve to clamp this by means of the rotational movement of the storage housing generated via the retraction movement of the telescopic profile.

In a development of the invention, the rack is detachably fastened or secured in a receiving groove extending in the longitudinal direction of the base profile, wherein preferably the rack is fastened in different mounting positions within the receiving groove, so that it protrudes more or less far out of the receiving groove and thereby with pinions can be combined with different diameters. The combination of pinion size and position of the rack in the receiving groove and the associated spring element, the storage capacity of the energy storage Chers on different weights of the telescopic profile to be coupled to the component, for example, table top, adjustable. In the case of a trained as a spiral spring energy storage, the storage capacity or the maximum storable spring energy can also be adjusted by the width, height and / or length of the coil spring forming the spring band and / or by the strength of the spring band. When using round spring wire, the storage capacity can be adjusted by varying the wire diameter and the length of the round spring wire Furthermore, the spring band by appropriate choice of the pinion coil material of the coil spring also different compact wrap, which then different spring energies can be stored.

The invention further comprises a table, in particular

Desk, with a height-adjustable table top and at least one connected to the table top table leg, which is characterized in that the table leg is formed as a telescopic part assembly according to one of claims 1 to 15.

A preferred embodiment of the invention is illustrated in the drawing and will be explained in more detail below. In the drawing show:

1 shows a preferred embodiment of the inventive subassembly when used as a table leg of a table, wherein the table top is shown in different height positions,

FIG. 2 shows a longitudinal section through the parts arrangement according to the invention of FIG. 1 in the region of the energy storage device and FIG FIG. 3 shows a cross section through the parts arrangement of FIG

Figure 1 in the field of energy storage device.

Figures 1 to 3 show a preferred embodiment of the invention telescopic part assembly 11, which is exemplified here as a table leg as part of a height-adjustable table 12 is shown.

As shown in particular in Figure 1, the table 12 has a height-adjustable table top 13 made of wood or metal material, which is mounted on two legs of the table and is supported by them.

Both table legs are formed as a telescopic part assembly 11.

As shown in particular in FIGS. 2 and 3, the parts arrangement 11 comprises a guide profile 14, which is U-shaped and in the present case forms one of the feet of the table 11. The guide profile 14 has in the example a side wall 15 and two of the side wall approximately at right angles projecting leg 16a, 16b. The inner sides of the legs 16a, 16b extend in the longitudinal direction 17 of the guide profile parallel to each other. The guide profile 14 is made of metal material, in particular aluminum. Conveniently, it is designed as an aluminum extruded profile. The side wall 15 and the two legs 16a, 16b define an receiving space 18 which is open towards the inside and in which a telescopic profile 19 is accommodated and guided there by means of guidance in the longitudinal direction 17 of the guide profile. The telescopic profile 19 is thus mounted adjustably in the guide profile 14. An identical embodiment of the telescopic part assembly is also found on the other table leg. To the two telescopic sections 19, the table top 13 is fixed, which is thus adjustable in height when retracting or extending the telescopic sections 19.

The telescopic profiles 19, of which only one example will be described below, is designed as a hollow profile and has a hollow chamber 20. As a profile material for the telescopic profile 19 also metal, in particular aluminum is used. Conveniently, the telescopic profile 19 is also designed as an aluminum extruded profile.

The telescopic profile 19 can be locked (not shown) by means of locking means at any altitude along its extension path, whereby the table top 13 can be adjusted continuously to the desired height.

As shown in particular in FIG. 3, guide means for guiding the telescopic profile 19 on the guide profile 14 are used. As guide means guide rollers 21 are used, which are rotatably supported by means of bearings on the telescopic profile 19. The bearing means include a bearing shaft 22 which is rotatably mounted on the one hand on a front wall 23 and on the other hand on a rear wall 24 of the telescopic profile 19. The guide roller 21 is formed for example as a rolling bearing and rotatably mounted on the bearing shaft 22.

As shown particularly in FIG. 3, guide rollers 21 are located on both opposite side walls 25a, 25b of the telescopic profile 21. In particular, each leg 16a, 16b of the guide profile 14 is assigned at least two guide rollers 21, so that synchronization is ensured. The guide rollers 21 each protrude over a Slot through the associated side wall 25a, 25b through and immerse in a respective leg 16a, 16b of the guide profile 14 in the longitudinal direction extending guide rail 26a, 26b and are guided there. The guide rollers 21 also sit relatively close to the side wall 15 of the guide profile 14, which also leads to an exact running of the telescopic profile 19 within the guide profile 14.

In the table leg, so in the telescopic part assembly 11, an energy storage device 27 is integrated, which has at least one energy storage 28 which is charged by the kinetic energy generated during retraction of the telescopic profile 19 with energy that can be used for the generation of a subsequent extension movement.

In the example, a mechanical energy storage 28 is provided in the form of a spring element. The spring element is configured in the example as a spiral spring, which has a helically extending spring band 29. The parts assembly 11 and the table leg also has movement-Umsetzmittel

30 for the movement implementation of the linear retraction movement of the telescopic profile 19 in a movement for charging the coil spring. The movement conversion means 30 comprise a transfer gear in the form of a gear transmission 31. The gear transmission

31 has a pinion 32 which is rotatably mounted in the manner described in more detail below on the telescopic profile 19 and a cooperating with the pinion 32 rack 33rd

As shown in particular in FIG. 3, the toothed rack 33 is received in a receiving groove 34 extending in the longitudinal direction of the guide profile 14. The rack 33 has, as the Marne already suggests, on its side of action a plurality of longitudinally successively arranged teeth (Figure 2). Furthermore, the rack 33 has their two opposite, substantially at right angles projecting from the active side longitudinal sides 35a, 35b teeth 36, which cooperate with formed on the respective inner walls of the receiving groove 34 counter teeth 37. By the cooperating teeth, the rack 33 is secured in Nuttiefenrichtung. Furthermore, this embodiment allows the insertion of the rack 33 in different positions, so that the active side protrudes more or less far out of the receiving groove 34. This makes it possible that the rack 33 can be combined with pinions of different diameters.

As already mentioned, the pinion 32 is rotatably mounted on the telescopic profile 19 by means of bearing means. To the bearing means includes a pinion shaft 38 which is rotatably connected to the pinion 32, wherein the pinion 32 is mounted on the pinion shaft 38 and releasably secured there, so that it can optionally be replaced by a pinion 32 smaller or larger diameter. The pinion shaft 38 in turn is in the transverse direction through the telescopic profile 19th

inserted therethrough, 24 through openings are formed both on the front wall 23 and on the rear wall.

The bearing means further includes a bearing sleeve 39 which is disposed within the hollow chamber 20 of the telescopic profile 19 and through which the pinion shaft 38 also protrudes. The bearing sleeve 39 is fastened by means of fastening means on the front wall 23 of the telescopic profile 19. The bearing sleeve 39 is thus fixed against rotation.

As shown in particular in Figure 3, the coil spring in the hollow chamber 20 of the telescopic profile 19 is arranged and that it is housed in a can-like storage housing 40. The storage housing 40 has a housing cover 41 which is non-rotatably connected to the pinion 32. For this purpose, for example, drive pins 42 project into holes provided on the housing cover 41. The housing cover 41 closes a housing base part 43, which in turn accommodates the coil spring. The housing cover 41 is rotatably connected to the housing base part 43, for example by fixing screws 44. Both housing cover 41 and housing base part 43 are penetrated both by the bearing sleeve 39 and the pinion shaft 38.

As shown in particular in Figure 3, sitting on the lateral surface of the bearing sleeve 39 is an outwardly projecting hanging nose 45 for suspending the spring band end of the spring band 29 of the coil spring. The other end of the spring band 29, however, is fixed by means of suitable fastening means on the housing base part 43. The spiral spring is thus clamped between the non-rotatable bearing sleeve 39 and the rotatable housing base part 43.

As shown in particular in Figure 1, the table top 13 can be adjusted by means of the telescopic part assembly 11 between different heights. If the table top 13 is to be displaced downwards, then it is first necessary to release the locking means. The locking means may for example comprise a Bowden train, which is arranged on the underside of the table top 13 and can be conveniently operated by the user there. The Bowden train is based on a shortening of a DrahtStücks, whereby a bolt can be solved, which then allows the retraction or extension of the telescopic profile 19 in or out of the guide section 14. The bolt may have a rack segment, which by spring force of a pressure spring in the teeth of the Rack engages 33 and thus blocks the entry or exit movement of the telescopic profile 19. By operating the Bowden train the rack segment is moved against the spring force of the pressure spring out of engagement with the rack 33, whereby the retraction and extension of the telescopic profile 19 is made possible. When retracting the table top 13 is thus moved together with the telescopic profile 19 down, the pinion 32 rolls on the rack 33 and is offset by this in rotational movement. The rotating pinion 32 drives thereby also the pinion shaft 38 and both the

Housing cover 41 as well as the rotatably connected housing base member 43 rotationally. By this rotational movement of the can-like storage housing 40, the coil spring is wound together, since they at the other end of the

non-rotatable bearing sleeve 39 is clamped. This rotational movement of the storage housing 40 together with the spiral spring leads to tensioning of the spiral spring, that is to say for storing spring energy obtained from the kinetic energy. If the lower position is reached, the locking means are activated again, whereby the table top is fixed in a fixed position in the set lower altitude. The energy storage device 27 may be housed in one of the two legs or table legs. Between the two telescopic sections 19 of the table legs, a synchronous rod, which ensures the synchronization during retraction and extension of the telescopic parts.

If the table top 13 is subsequently moved back up, the spring energy stored during retraction is used for extension. In this case, the locking is first released again, whereby the telescopic profile 19 with the help of the stored spring energy automatically or with little support of the user in the higher position can be relocated. The storage capacity of the spiral spring can be expected to the weight of the table top 13 and on a to- »

Tende loading of the table top 13 may be set so that even a loaded table top 13 can be easily moved automatically or with little support of the user with the help of the stored spring energy in a higher position.

Claims

claims

1. Telescopic part arrangement elongate shape, such as table leg, with a guide profile (14) and a longitudinally adjustable on the guide profile (14) mounted telescopic profile (19) in the extension direction of the guide profile (14) out and in the direction of retraction in the guide profile (14) can be moved in, and with locking means with which the telescopic profile (19) can be locked in position after taking a desired relative position with respect to the guide profile (14), characterized in that in the parts arrangement (11) an energy storage device ( 27) with at least one energy store (28) is integrated, which can be charged by the kinetic energy generated during retraction of the telescopic profile (19) with energy that can be used for the generation of a subsequent extension movement.

2. Parts arrangement according to claim 1, characterized in that it is the energy store (28) is a mechanical energy store (28).

3. Parts arrangement according to claim 1 or 2, characterized in that the mechanical energy storage has at least one spring element and the kinetic energy can be stored in the form of spring energy, wherein it is preferably in the spring element is a coil spring.

4. parts arrangement according to one of the preceding claims, characterized in that the energy storage device (27) movement Umsetzmittel (30) for the motion conversion of the linear retraction movement of the telescopic profile (19) in a loading movement for charging the energy storage device (28).

5. parts arrangement according to claim 4, characterized in that the movement-Umsetzmittel (30) comprise a transfer gear, with gear parts, of which at least one of the guide profile (14) and at least one of the telescopic profile (19) is assigned.

6. parts arrangement according to claim 5, characterized in that it is in the transfer gear to a gear transmission

(31), wherein preferably one of the gear parts as a pinion (32) and one of the gear parts as with the pinion

(32) cooperating rack (33) is formed.

7. parts arrangement according to claim 6, characterized in that the pinion (32) on the telescopic profile (19) and the toothed rack ge (33) on the guide profile (14) is arranged.

8. parts arrangement according to claim 6 or 7, characterized in that the pinion (32) by means of bearing means rotatably mounted on the telescopic profile (19) and in the linear movement of the telescopic profile (19) via the engagement in the rack (33) is set in rotational movement ,

9. parts arrangement according to claim 8, characterized in that the bearing means a pinion shaft (38) rotatably connected to the pinion (32) is releasably connectable and on the telescopic profile (19) rotatably mounted bearing sleeve (39) in which the pinion shaft (32 ) is rotatably mounted, have.

10. Parts arrangement according to one of the preceding claims, characterized in that the telescopic profile (19) is designed as a hollow profile with a hollow chamber.

11. Parts arrangement according to one of the preceding claims, characterized in that the guide profile (14) is designed as a U-profile.

12. Parts arrangement according to claim 10 or 11, characterized in that the energy store (28) in the hollow chamber (20) of the telescopic profile (19) is arranged, wherein preferably the energy storage (28), in particular the spring element in a particular can-like storage housing (40 ), which is arranged in the hollow chamber (20) of the telescopic profile (19).

13. parts arrangement according to claim 12, characterized in that the storage housing (40) rotatably connected to the pinion (32) and during the rotational movement of the pinion (32) is also rotated.

14. Parts arrangement according to claim 12 or 13, characterized in that in the case of a spring element in the form of a spiral spring, this on the one hand on the rotatable storage housing (40) and on the other hand on the non-rotatable bearing sleeve (39) is mounted and by means of the retraction of the telescopic profile ( 19) generated rotational movement of the storage housing (40) can be tensioned.

15. Parts arrangement according to one of claims 6 to 14, characterized in that the rack (33) in a in the longitudinal direction of the guide profile (14) extending receiving groove (34) is detachably fastened or fastened, wherein preferably the rack (33) in different directions tion positions within the receiving groove (34) can be fastened so that it protrudes more or less far from the receiving groove (34) and thereby interact with pinions (32) with different diameters.

16. table, in particular desk, with a height-adjustable table top (13) and at least one with the table top (13) connected table leg, characterized in that the table leg is formed as a telescopic part assembly (11) according to one of claims 1 to 15.