WO1998001056A1

WO1998001056A1 - Extending table, extendable support structure and sliding body

Info

Publication number: WO1998001056A1
Application number: PCT/CH1997/000265
Authority: WO
Inventors: Tony Rüegg; Peter Rüegg
Original assignee: Rueegg Tony; Rueegg Peter
Priority date: 1996-07-10
Filing date: 1997-07-10
Publication date: 1998-01-15
Also published as: EP0874567A1; DE19627794A1; DE19627794C2

Abstract

The invention relates to an extending table (1) with an extendable support structure (6) with toothed sliding bodies which are advantageous in that they transfer large forces and achieve a very high level of stability for the entire support structure. The toothed sliding bodies preferably have at least for each sliding pair at least two inclined toothed flanks resulting in optimum guiding but no jamming. The solution enables considerable sliding clearance for the toothed sliding bodies, and the clearance action to be neutralised by a curved embodiment of the toothed slideway countersinking system in the longitudinal beams of the support structure. The end table panels are advantageously reinforced with an open stabilising rod inserted in an omega groove, and the inserted table panels have a lightweight structure. Said table panels are also clamped together by an automatic control cable having a friction tension roller.

Description

Extending table, extendable support structure and sliding body

Technical field

The invention relates to an extendable table with a foot construction of an extendable table surface or table top and an extendable support structure for the extendable table surface, for supporting at least one additional table top, the extendable support structure having at least two longitudinal supports which can be displaced in parallel by sliding bodies, furthermore an extendable support structure and one Sliding body.

State of the art

Extending tables have a very long tradition. The main purpose is that in normal use, a smaller table surface is not only sufficient, but is also more optimal in terms of the overall use of space. The most common case for the need for a larger table surface, as far as it concerns the private area, is almost always a larger number of people who sit at the same table as guests or visitors. The extendable table can be quickly expanded and shortened for 6, 10, 12 or more people. The best known example of this is the living room table as it is e.g. is described in DE-OS 36 36 169. This table essentially consists of a foot construction which supports the table tops via a supporting frame. When retracted, the table surface consists of two table tops that can be pulled apart if necessary, so that a free space is created in the middle. An additional table top is then placed in the middle field. A cable pull is provided for pulling together and synchronizing the movable table top parts, with which all table tops are firmly clamped together in the desired configuration. Older extension tables usually have a simpler construction with regard to the guides, e.g. simple guide rails, which are guided with play in suitable grooves. With the classic extending table, the additional surfaces are not inserted inside, but added outside. The additional table surface is freely cantilevered on support guides. The resilience of the cantilevered table surface is limited. Above all, the table loses some of its stability and can tip over when subjected to heavy one-sided loads. The freely cantilevered part is therefore usually chosen only so large that the entire table surface is approximately extended when pulled out on both sides

REPLACEMENT LEAF is doubled. Very often, however, more than just doubling the table surface is desired. For this purpose, a special type of extending table has already become well established on the market. EPA 87 684 shows such an extending table in which the table surface can be multiplied by inserting additional table tops between the two end table surfaces. The problem of tipping over with one-sided loading is eliminated by the concept of inserting intermediate additional plates. But if the table surface is tripled or even quadrupled, the table in the middle part loses its stability. The distance between the two legs of the support structure is now so great that the table surfaces bend in the middle, even under their own weight.

EPA 87 684 tries to remedy this situation by moving the foot construction simultaneously and relative to the end table tops when the two end table tops are pulled apart, in such a way that the two legs inevitably move apart less by means of scissors construction. The base of the two legs moves from the original position under the two end table tops to an intermediate position, e.g. under the two outermost additional table tops. It is assumed here that the extendable support structure has sufficient rigidity due to the remaining free span. The support structure consists of a so-called multiple extension. Technically and industrially, many pull-out or pull-out mechanisms are known which are almost free of deflection and work almost without play. However, all of these solutions are ruled out for price reasons, especially for weight reasons in furniture construction. A certain weight is definitely desirable for a table. However, a table should be able to be moved by one or at most two people without any problems. A heavy metal construction for the extendable support structure is not usable. There are various types of pull-outs or extendable support structures that are specially designed for pulling out furniture parts such as drawers or table tops. As far as the inventors are aware, a multiple extension in wood is used in the concrete market implementation of the solution according to EPA 87 684, which is based on the concept of tongue and groove. This concept works excellently when manufactured precisely and when new. In addition to numerous advantages, wood has the disadvantage that it shrinks or expands depending on the water content. Experience shows with corresponding drawer runners that they jam after a certain time or from time to time. The jamming can be easily remedied by providing enough play for the guides. If, however, a lot of play is planned for the guides in the case of multiple pull-outs, the problem of sagging arises again, if only by adding up all the games. The US-PS 3 91 1 835 shows a typical multiple extension as it is usually made in metal. To ensure that the multiple pull-out does not interfere as a foreign body, the overall height must remain small. A low, light one

TZBLATT Metal profile bends at the specific lengths of e.g. 1 to 2 meters too strong. Apart from the influence of the play between the sliding elements, multiple metal pull-outs have not been widely used on pull-out tables. The use of metal pull-outs is more the area of drawers with a limited pull-out length.

In contrast, EPA 381 833 takes advantage of the properties of wood. It has been correctly recognized that wood has a very high rigidity in relation to the weight and volume. The pull-out is therefore preferably made of wood. The actual guidance of the individual longitudinal members is ensured by guide pieces which have a so-called dovetail profile. The dovetail profile is used today mainly for firm corner connections and results in very precise guidance, provided that little play is provided between the guide bodies and the corresponding professional milling out of the side members. However, since wood shrinks or grows as the main disadvantage according to the respective moisture, the risk of jamming with a sliding connection can be even greater than with a simple groove solution. Even a dovetail approach according to EPA 381 833 can only partially solve the conflict of objectives, because there are partly opposing demands. The main requirements for a pull-out table or pull-out include:

• stability of the table surface or tabletop also with regard to warping;

• Stability in every possible extension length;

• Stability with maximum extension without intermediate plates;

• horizontal position of the entire table surface, at least in the absence of a major external load;

• easy to extend even after years of use;

• Removing and pushing back together should, as far as possible, be carried out by a person who is also not particularly strong;

• rapid change in different lengths;

• legroom;

• Possibility of different designs, especially without a disturbing, technical effect of the extract;

• maximum resilience in each extension length, etc.

Presentation of the invention

The object of the invention was now to come as close as possible to the entirety of the requirement points without other significant disadvantages

REPLACEMENT LEAF must be taken, in particular to create a table surface or tabletop that is functionally flawless and stable in all types of use.

The pull-out table according to the invention is characterized in that the sliding body is designed as a tooth sliding body with a corresponding tooth path on the longitudinal beams, a sliding section between the sliding body and the displaceable longitudinal beam having at least two inclined tooth flanks directed towards one another.

One of the main ideas of the new invention is that the sliding guides, such as those used for more than a century. proven with lathes, should also be good when moving out. An analysis of the problem of the two objects surprisingly shows that many functional relationships are exactly the same. There are three points in the foreground:

• A tooth sliding body slides completely linearly on the tooth sliding flanks of an appropriately designed tooth path. In a given construction, maximum parallel guidance can be ensured even with external forces.

• The tooth sliding body provides an optimal distribution of forces on the inclined tooth flanks, be it with external forces that are perpendicular or inclined to the vertical.

• The tooth sliding body prevents a clamping effect against the sliding movement in a very wide area of the tooth profile.

The invention allows a number of advantageous configurations. A first embodiment is characterized in that one end table top with a foot construction firmly connected to it is supported on the floor in such a way that the two end table tops can be pulled apart via the support structure and one or more additional table tops can be placed on top. It is also possible for the undrawn table surface to consist of two end table tops and a center top, with one or the other end table top being optionally extendable and at least one additional table top each being insertable. The pull-out table very particularly preferably has a quick-release pull-out table clamping device, in particular with a cable pull with automatic cable pull-in, which, when unactuated, generates a slight pulling force on the table tops and a strong pulling force by actuating a tension lock.

According to a further particularly advantageous embodiment of the invention, the table top consists of glued solid wood with a preferred direction of the grain, at least one rigid stabilizing bar being embedded in the table top transversely to the longitudinal direction of the wood. For this purpose, it is proposed that in the table top on the underside of the top for the stabilizing bar at least one milling open to one side, for example in the

REPLACEMENT LEAF To attach an Ω (Omega), for longitudinal insertion of the stabilizing bar. It has been common practice for decades to provide stabilized bars to particularly glued panels. However, it was assumed that this should preferably be arranged in the middle of the plate material in order to be able to exert a uniform effect, e.g. for formwork panels for concrete formwork. Special long drills with a length of 0.5 meters and more are required for production. In recent times, therefore, in the case of glued panels, the individual sections are drilled prior to gluing. The disadvantage here, however, is that the sections have to be put together by hand in a very time-consuming manner because of the holes which have little play and can only then be glued. According to the new proposal, a hole is no longer drilled, but e.g. milled an "omega shape" with a ball mill after gluing, which has many advantages in terms of manufacturing technology. The mentioned Ω form is suggested as the most obvious solution. Depending on the profile of the stabilizing bar used, a different cross-sectional shape can also be selected. According to the new idea, however, there is still a constriction with regard to the actual professional milling through which the longitudinally working tool moves from the outside. Enough material remains to hold the rod in the transverse direction. It is also interesting to note that the rod does not actually have to be hammered in after the new solution, but rather only pushed in and, depending on the situation, even little can be moved by hand. It is ensured that the rod remains cage-like on both end sides with sufficient sliding play. In the transverse direction, one or more tenths of a millimeter of play is provided between the diameter of the stabilizing bar and the milling profile. An important point, however, is that regardless of the size, the table top is finished and glued, at least in its rough shape, and only then is it provided with one or more millings. This allows an enormous rationalization of the production.

Another very valuable further development idea is that the table top firmly connected to the foot construction is preferably made of solid construction and the additional table tops that can be inserted are made of lightweight construction. This has special advantages. The additionally insertable table tops have a predominantly functional meaning, especially in terms of easy handling. Placing a table top from the side of a table without overly large sliding without scratching movement on the support structure is a very unfavorable task in terms of force. The light weight is therefore particularly advantageous for the inserts.

The new invention further relates to a support structure which can be pulled out in parallel via sliding bodies, in particular for an extending table, and is characterized in that the sliding body as a toothed sliding body with a corresponding toothed track on the longitudinal beam

REPLACEMENT LEAF is formed, wherein a sliding part between the sliding body and the displaceable longitudinal member has at least two mutually directed, inclined tooth flanks. One tooth sliding body is preferably arranged in the end region of the two longitudinal members that cooperate in each case, the longitudinal bars having corresponding tooth sliding profile tracks over the entire length of the tooth sliding body. In this way, the toothed sliding bodies have a similar function to the rollers of a roller pull-out. For a complete girder construction, the extendable girder construction preferably consists of two opposing, parallel pull-outs with corresponding tooth sliders. In this way, the extendable table top is held by two guides. Misjudgment is completely impossible, as is often the case with drawer pull-outs. In the case of e.g. smaller tables, extendable support surfaces or use with drawers, it is also possible that the extendable support structure is made up of one or two pull-outs running in parallel. An extract is always formed via tooth slides. A second guide can also be done via simple slide rails. With the extending table, lateral shrinkage or growth of the table top is not a problem, since the support structure is also moved. In the case of a drawer or a simple pull-out work surface, the pull-out is between two separate and differently deforming bodies. The combination of toothed sliding bodies and sliding rails can be an advantage here, since any amount of side play can be provided on one side without the good sliding effect being lost. As in the prior art, the new support structure can also be designed as a multiple extension, e.g. as a double, triple or quadruple drawer. In addition to the guiding and sliding function, the tooth sliding bodies also have a stop function. The toothed sliding bodies are therefore preferably arranged in the end regions of the side members. At least in the case of use with extending tables, according to the previous clarifications, the length of a toothed sliding body is at least 5%, preferably 12 to 25% of the length of the usable extending length of a side member. As a result, wood, in particular, is taken into account. If the toothed sliding bodies are too short, there is a risk of local impressions due to greater loads, which can damage the sliding surface in the long term. The length is limited by the corresponding reduction in the useful length of the pull-out. A very important aspect lies in the fact that the tooth profile of the tooth sliding body has at least two tooth flanks which are directed towards one another and are inclined approximately at an angle of 45 degrees. As far as the building material wood allows, any tooth shape can be selected, even with rounded sections as was often the case with wood threads in the past. According to the previous investigations, the 45 ° inclined tooth flank has proven to be the optimal form. In the horizontal position of use, the tooth sliding body also has a preferably identical sawtooth profile at the top and bottom. Particularly preferably, at least two tooth meshes are formed for each pair of sliding elements. On

REPLACEMENT LEAF A very important aspect for a good and long-term safe sliding movement is that the toothed sliding bodies consist of a tough, hard plastic material with high sliding ability and, if necessary, are also provided with a lubricant. Tests have confirmed that a particularly successful combination is created if the side members are made of hardwood, preferably European beech. Together with the plastic sliding bodies mentioned, an excellent sliding effect is created. The beech wood has great strength and is very rigid. It is very useful if the longitudinal beams are milled into the tooth profile over their entire length, ie continuously. On a corresponding end side of each side member, a toothed sliding body can be inserted and e.g. be fixed by screws. Another design idea is that the tooth profile is milled in the longitudinal members slightly arched over the length. Even a relatively large play between the tooth sliding body and the tooth milling in the longitudinal members can thus be compensated for. The horizontal alignment of the table surface remains in different pull-out positions. Another crucial point is that a single sliding body (as shown in FIG. 8), as will be shown, already provides perfect guidance, so that for small, extendable objects, a guidance with one sliding body on each of the two parts to be moved relative to one another can suffice.

Brief description of the invention

The new invention will now be explained in more detail with some examples. FIG. 1 shows an extending table that has not been extended; FIG. 2 shows FIG. 1 when changing over to the extended position; 3 shows a fully extended table with several additional table tops inserted; 4 shows the extendable support structure on a larger scale; FIGS. 5a and 5b show the two main loading situations of an extended table, with and without the additional table tops inserted; Figure 6 illustrates the legroom problem; FIG. 7 different possible extension lengths; FIG. 8 shows a tooth sliding body; FIGS. 9a and 9b show the drawn-in and pulled-out situation of two longitudinal beams; FIG. 9c shows the playing conditions for a toothed sliding body; FIG. 10a shows a double pull-out with two longitudinal members shown separately; FIG. 10b shows a curved tooth path milling; the figure 1 1 a and 1 1 b, a double or. a triple extension in a pushed together position;

REPLACEMENT LEAF Figures 12a and 12b, 12c a table top with different cuts with two

Stabilizing bars; Figures 13a and 13b schematically the clamping of the individual table tops; FIG. 13c if the deflection is too great; FIGS. 14a, 14b and 15 correspond to a tensioning device according to the invention

Figure 13a; FIG. 16 shows the procedure, here the milling of an Ω groove; Figures 1 7a, 1 7b, 1 7c, 1 7d and 17e show different table shapes with stabilizing bars.

Ways and implementation of the invention

In the following, reference is now made to FIGS. 1 to 3. Figure 1 shows a table 1 in the simplest and shortest form and consists of two end table tops 2 and 3 and a foot construction 4, which in the example consists of three legs 5 for each end table top. In FIG. 2, an extendable support structure 6 can be seen from the same view when the table 1 is extended, an additional table top 7 already being placed on the support structure 6. FIG. 3 shows the same table 1 with three additional table tops 7, 7 'and 7' '. The distance between the legs 5, 5' is denoted by A in FIG. 1 and B in FIGS. 2 and 3. It is clearly recognizable that the distance B is a multiple of A. The connection between them forms, as it were, a bridge, the support structure 6. The normal pull-out direction is marked with an arrow 8. The arrow 9 indicates a further action of force, indicated laterally on the end table tops 2, 3, Figure 4 shows on a larger scale the extendable support structure, which has to take over a very substantial part of all acting forces, especially in the extended positions. The two main forces for a table are shown in Figures 5a and 5b shows schematically Figure 5a shows the table with extended support structure but still without additional table tops inserted In terms of the support structure, this is the unfavorable disposition, since the forces on the displacement points fully affect the support structure and the stability of the individual longitudinal supports 10, 1 1, 12 or. 10 ', 1 1' and 12 'act. The force shown is indicated by arrow EG, i.e. only the dead weight. In practice, the situation is usually different, since intentionally or unintentionally, even greater forces are exerted. Figure 5b shows the extended, fully assembled table with a larger load GB. This can consist, for example, of a person sitting on the table in the middle or on one side. Figure 6 illustrates the problem of legroom. It should be prevented that a person 15 e.g. contacted the lower edge 17 of the support structure 6 with the knees 16. It exists

REPLACEMENT LEAF hence the requirement to keep the height dimension H of the support structure as small as possible. FIG. 7 shows various pull-out positions with zero to 4 additional table tops.

In the following, reference is now made to FIGS. 8, 9a and 9b. A single toothed sliding body 20 is shown in FIG. In the example according to FIG. 8, if a central plane 21 is assumed, two teeth 22 o (top) and 22 u (bottom) are provided on both sides. As can be seen in FIG. 10a, only one half is used for the sliding function (22 o and 22 u) in the side member 10. The other half is used for anchoring in the side member 1 1, which can be moved parallel to it. It is now important that each slide section has at least two tooth flanks 23, 24 inclined at an angle a (see enlarged section). A force G is thereby necessarily divided into two partial forces P1 and P2, which are directed essentially perpendicular to the flanks 23, 24. If properly designed, there can no longer be any clamping effect. The same tooth configuration is preferably arranged above and below, so that the action of force from below and from above is intercepted equally. An angle a of approximately 45 ° was determined to be optimal, depending on the size of the object, a single tooth may also be sufficient. In a special case, three or more teeth can be provided per sliding section. It is also possible to use rounded teeth. In all cases, however, at least two mutually inclined flanks are required. Figures 9a and 9b show a single extension in the pushed together and in the extended position. It can be seen in FIG. 9c that the tooth play Zs is very small compared to the side play Ss on the flat long side of the toothed sliding body.

FIGS. 10a and 11 show, analogously to FIG. 9a, a double pull-out with three longitudinal members 10, 11, 12. FIG. 1b shows a triple pull-out. The only constructive difference is that the central longitudinal beam 12 has the same tooth path milling 25 on both sides. As a rule, each side member (10, 1 1, 12) has a toothed sliding body on one or both sides at the end, which e.g. can be fixed to the wood with a screw 26. In each case a flat end face 28, 28 'serves to limit the maximum deflection and also as a stop. With regard to a side member, the usable length NL is related to the length ZL of a toothed sliding body. ZL should be at least 5%, preferably 12 to 25% of NL. FIG. 1 a shows a double extract and FIG. 1 1 b shows a triple extract, each in the pushed-together position. Sufficient play of preferably a few tenths of a millimeter must be provided between the toothed sliding bodies 20 and the tooth path milling 25. FIG. 10b shows another particularly interesting design idea. An approximately circular curved line 29 is shown below the longitudinal beam 10, 11, 12, etc. This is to express that the tooth path millings in the longitudinal beams are not completely straight but

REPLACEMENT LEAF is preferably formed according to a curve, such that the tooth path milling is higher by a dimension X of one or more millimeters in the middle of the longitudinal member. In this way it can be achieved that the game mentioned is lifted when being pulled out and no sagging is found even when the support structure is completely pulled out. As will be explained with reference to FIGS. 13a, 13b, this has not only an aesthetic but also a very important functional effect.

FIGS. 12a, 12b and 12c show a further design idea. It has been decades of practice to stabilize cross-glued table tops with a metal rod. This means that subsequent discarding, e.g. can be avoided by changing the water content in the wood. The inventors have now recognized that, especially in the case of glued table tops, the underside must be neatly worked out, but an open longitudinal groove 30 in no way disturbs. It is now proposed that the longitudinal groove 30 be worked out by means of a milling cutter, in particular a ball milling cutter. An inserted stabilizing rod 31 e.g. made of a rust-proof special metal, in particular high-alloy special steel, still has enough "meat" in the Ω-shape (marked with reference number 32) to withstand any warping forces. A high quality of a rigid chrome beam (e.g. St. 100) or of even higher quality is preferred. It is important that the stabilizing bar has a very high level of flexural rigidity and does not receive any permanent deflection under normal loads. The stabilizing bar is pushed into the circular part of the longitudinal groove by hand with play of one or more tenths of a millimeter and held captive by end pins, but in such a way that in the longitudinal direction there is a play of e.g. 05 until 1 cm remains. It is important that the stabilizing bar remains movable not only at the time of manufacture, but also later when the wood is extremely dry, i.e. even after the wood has shrunk. This prevents the stabilizing rod from jamming and tearing e.g. the glue spots on the glued table top parts. The stabilizing bar should therefore not be glued in. In addition to the functional reliability, the new solution offers the additional advantage that you can see from the outside whether the table top is stabilized with a metal rod or another equivalent building material or plastic, or not, which can be very important for later use or recycling. The stabilizing bar is very beneficial in several ways. It can be a spigot at the same time, where two table tops meet. according to Figure 12a. In the normal case, the stabilizing bar is only inserted and serves as security against late discarding and secures the glue spots. As soon as fault forces arise because e.g. If the tabletop receives strong moisture on one side, the straight rod blocks it. The greater the fault forces, the greater the alignment forces of the stabilizing bar. This is especially true when the individual table tops are clamped together with excessive forces, e.g.

REPLACEMENT LEAF with the tensioning device according to Figures 14a and 15. A very important point is that the table top can be of any length across the wood grain.

FIGS. 13a and 13b show the clamping of the individual table tops 2, 3 after the insertion of additional table tops 7. As explained for FIG. 10b, all the longitudinal beams 10, 11, 12, etc. have a curved tooth path milling 25, which has a radius R is also indicated. This ensures that the support structure remains completely horizontal in the extended position without deflection, at least if an additional force (GB) does not act directly on the extended support structure due to external action. The table surface is completely flat in every pull-out position. However, this now has the consequence that the end faces 40, 41 of the table tops which meet each other meet with a full end face. If, on the other hand, the plane E were bent, the table top with its respective upper edges 43, 44 would collide with one another, but this can lead to local edge damage when clamped together (FIG. 13c). In addition, the table composite is less stable if only edges collide. Accordingly, FIG. 13c is crossed out with two crossed lines. FIG. 13a shows a tensioning device 50 on the right-hand side, in which a rope 52 can be tensioned with a strong contraction force relative to a rope anchorage 53 on the left-hand side via a handwheel 51. So that the table top fits together well and is also held against lateral forces, the table tops are additionally guided with pins and in the counterpart with pin holes (46, 47). From the structural design shown, the external forces acting from top to bottom are optimally intercepted by the composite formed thereby. Without the support weight, the support structure remains completely horizontal due to the effect of the toothed slide in the side members above the support level "E". After the table tops have been pressed together with the clamping device 50, a large clamping force is generated in the plane Y, which as a reaction force in the plane "Z" gives the entire table structure a very high degree of intrinsic stability and also allows large external loads (BG) without the table Damage occurs.

14a, 14b and 15, the tensioning device 50 is now referred to on a larger scale. For easier understanding, the main clamping elements are shown in FIG. 14a on their own. V denotes the anchoring of the clamping device in relation to a table top or an extendable end of the support structure, the part on the opposite side (Sv) being anchored either to a table top or to the support structure. In the unstressed state, a cable winding roller 54 runs freely on an axis of rotation 55 which is firmly connected to the anchoring "V". In the cable winding roller 54 there is a spiral spring 56 as in

REPLACEMENT LEAF automatic cable feeds e.g. is generally known in house vacuum cleaners and is therefore not described further. The cable wind-up pulley 54 has a brake lining 58 with respect to a brake disk 57. With B / Sp. it is indicated that between the brake disc 57 and the brake pad, depending on the current function, either a braking effect or a free running is possible with clearance Sp. By turning the coarse thread 59, the handwheel 51 can either loosen the friction combination of the cable wind pulley 54 and the brake disc 57 or else compress it against the brake lining 58. According to the usual practice, a right-hand thread is selected, which means that turning to the right causes tensioning and turning to the left causes loosening or relaxation. During tensioning, there is a frictional connection between the handwheel 51 via the coarse thread 59 and the cable winding roller 54 on the one hand, and the handwheel 51, the brake disc 57, brake pad 58 and in turn the cable winding roller 54 on the other hand. After the play Sp has been eliminated (FIG. 14a), a strong frictional engagement is created, so that the rope can be tensioned with any force, provided that this can be applied via the handwheel 51. A backstop 60 ensures that the brake disc 57 can only move in an exciting sense, so that the spiral spring 56 is supported in the tensioned state and the rope remains tightened. As an assembly, it also has a housing 61, which carries the axis of rotation 55 firmly connected, so that the entire housing 61 can be fastened to a table top or to the extendable support structure by means of screws 62. The brake disc has a similar effect to the brake pads of vehicle brakes. Any brake combinations can be selected between the brake disk 57 and the frictional counter surface of the cable winding roller, the friction surface can also be conical, it is essential to release and press on the brake pads. FIG. 16 shows a table top 70 analogous to table tops 2, 3, 7 etc. with the operating method for milling an Ω groove 75. Preferably, only a dome-shaped milling 71 is first produced over the entire slot length, so that the remaining slot opening has the Edges are broken (left in Figure 16). As a result, the ball end mill is sunk into the plate to the desired depth and the Ω profile is milled over the desired length and a stabilizing rod 74 is inserted. If desired, the slot opening can also be closed with a cover strip 72. Figures 1 7a to 1 7e show different table shapes with one to three stabilizing bars 70, analogous to Figures 12a, 12b and 12c. The stabilizing bar is preferably arranged in the lower part of the table cross section. The bar thickness can be the same as in the prior art.

REPLACEMENTB

Claims

1 extending table with a foot construction of an expandable table surface or table top and an extendable support structure for the extendable table surface, for expansion with at least one additional table top, the extendable support structure having at least two long parts that can be displaced in parallel by a sliding body, characterized in that the sliding body is a toothed sliding body (20) is designed with a corresponding toothed track on the long beams (10, 11, 12), a sliding part between the sliding body (20) and the displaceable long parts (10, 11) having at least two mutually directed, inclined tooth flanks (23, 24) .

2. Extending table according to claim 1, characterized in that one end table top is supported on the floor with a foot construction firmly connected thereto, such that the two end table tops can be pulled apart via the support structure and one or more additional table tops can be placed on top.

3 extending table according to claim 1 or 2, characterized in that the undrawn table surface consists of two end table tops and a center plate, wherein one or the other end table top can be pulled out and at least one additional table top can be inserted.

4. Extending table according to one of claims 1 to 3, characterized in that it has a quick-release extending table-Spanneinπchtung especially with a cable pull with automatic cable pull, which is unactuated a light and by actuating a clamping friction lock a strong pulling force can be generated on the table tops.

5 extending table, in particular table top, preferably according to any one of claims 1 to 4, characterized in that a single table top consists of solid wood, preferably glued in the grain direction, in the underside of which at least one unilaterally open cut-out is attached, in which a rod-tipping rod is arranged transversely to the grain or Holzlangsπchtung is embedded

REPLACEMENT LEAF

6. Extending table in particular table top according to claim 5, characterized in that one or more cutouts in the shape of an Ω (omega) are provided in the underside of the table top for the longitudinal insertion of one or more stabilizing bars.

7. Extending table according to one of claims 1 to 6, characterized in that the table top firmly connected to the foot construction is preferably made of solid construction and the additionally insertable table tops are made of lightweight construction.

8. Extendable support structure, in particular for an extension table, with a longitudinal support structure that can be moved parallel on a sliding body, characterized in that the sliding body is designed as a tooth sliding body (20) with a corresponding toothed path in the longitudinal structure (10, 11, 12), with a sliding part between the sliding bodies (20) and the displaceable longitudinal parts (10, 11) has at least two mutually directed, inclined tooth flanks (23, 24).

9. Extendable support structure according to claim 8, characterized in that a toothed sliding body is arranged in the end region of the two mutually cooperating longitudinal beams, the longitudinal beams having corresponding toothed sliding profiles over the entire length of the toothed sliding body.

10. Extendable support structure according to claim 8 or 9, characterized by the fact that the extendable support structure is formed from two parallel pull-outs with corresponding tooth slides.

11. Extendable support structure according to claim 8 or 9, characterized in that the extendable support structure is formed from two parallel pull-outs, one of which is guided by toothed sliding body and the other by simple slide rails.

12. Extendable support structure according to claim 8 to 11, characterized in that the support structure is formed as a multiple extension.

REPLACEMENT LEAF

13. Extendable support structure according to claim 8 to 12, characterized in that the length of a toothed sliding body is at least 5%, preferably 12 to 25% of the length of the usable extension length of a side member.

14. Extendable support structure according to claim 8 to 13, characterized in that the tooth profile of the tooth sliding body has a sliding guide at least two mutually directed tooth flanks which are inclined at an angle of 45 degrees.

15. Extendable support structure according to claim 8 to 14, characterized in that the toothed sliding body in the preferably horizontal position of use has an identical sawtooth profile at the top and bottom, preferably with approximately 45 ° inclined tooth flanks, with particular preferably at least two tooth engagements being formed for each sliding pairing .

16. Extendable support structure according to claim 8 to 15, characterized in that the toothed sliding body consists of a tough, hard plastic material with high lubricity and can be inserted at each end of each side member via a corresponding tooth profile and for example. can be fixed by screws, the longitudinal beams are preferably made of hardwood.

17. Extendable support structure according to one of claims 8 to 16, characterized in that the internal tooth profile in the longitudinal beams is slightly curved over the length, in order to maintain a horizontal alignment of the table surfaces in the different pull-out positions.

18. Sliding body for an extendable support structure, in particular for an extending table, with at least two longitudinal support structures which can be displaced in parallel on a sliding body, characterized in that the sliding bodies are designed as toothed sliding bodies (20) with a corresponding toothed track on the longitudinal support (10, 11, 12), one Sliding section between the sliding body (20) and the displaceable longitudinal member (10, 11) has at least two mutually directed, inclined tooth flanks (23, 24).

REPLACEMENT LEAF