DE2516129A1 - Stilt or spacer-type adjustable-height support element - has interlocking transverse low ribs on interfacing corresponding wedge surfaces - Google Patents

Abstract

The support element, which is adjustable height, as used for variable spacing, height-adjustable stilt supports, or similar functions, incorporates two support units, acting in coordination, with contact surfaces in the form of similarly pitched wedge surfaces. These support surfaces (4, 6) have interlocking low-profile ribs lying across the angle of inclination of their wedge surfaces. The ribs (16, 18) may be saw-toothed in cross-section, with the steeper flanks on the rear sides. Each of the wedges surfaces may incorporate a parallel groove and tongue. Exactly dimensioned operations can be carried out without difficulty.

Description

Height-adjustable support element

The invention relates to a height-adjustable support element with two interacting support bodies, the contact surface of which are designed as wedge surfaces of the same slope.

Height-adjustable support elements are particularly in the Construction used for all kinds of compensation work, for example as adjustable spacers, height-adjustable Pedestals and the like. So far, wooden wedges or wooden wedge pairs have generally been used for this purpose.

509843/0209

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gen used. Wooden wedges have the disadvantage that they when Dry out shrink and there is a risk that the fastenings made with such wooden wedges or supports become loose, with the wedges falling out under certain circumstances or those caused by the wedge pairings specified distances change.

The object of the invention is to create height-adjustable support elements, with which in a simple manner, dimensionally accurate Work is made possible.

This object is achieved according to the invention in that the support body consists of an injection moldable or plastically deformable material produced and on their wedge surfaces with transverse to the slope, with each other combing ribs of small height are provided.

Preferably the transverse ribs are sawtooth-like Cross-section formed, with the steeper flank of the rib in the direction of slope in each case on the back the rib is formed.

In a first main embodiment, the support bodies are designed as a wedge body which are provided with elongated holes which extend in the longitudinal direction of the slope.

The wedge bodies are preferably provided with parallel guides extending in the direction of the slope. These Parallel guides are preferably formed in / on the wedge surface of the wedge body. The parallel guides can be designed as grooves and tongues.

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To facilitate handling, the two wedge bodies should be at least perpendicular to their wedge surfaces are inextricably linked. For this purpose, at least two oppositely directed flanks can be used the grooves and tongues can be designed with undercuts. In one embodiment is on each wedge face in each case a hat and a spring are provided, which are arranged parallel to one another. It can be in the wedge surface one wedge body has at least one groove and at least one tongue is provided on the wedge surface of the other wedge body be. The tongue and groove can each adjoin the elongated hole on one side «

In an expedient embodiment is on one Wedge body a spring and arranged on the other wedge body a groove in such a way that they are substantially symmetrical to the longitudinal center line of the wedge body * The width of the spring can be about half the width of the wedge body or correspond to the wedge surface.

To the wedge body in the mentioned way perpendicular to At least two opposing tongue and groove flanks are to be fixed to one another on their wedge surfaces each other formed undercutting. The undercut is to be dimensioned in such a way that the wedge bodies are perpendicular to the wedge surfaces at least by the height of the ribs from one another can be withdrawn.

To keep the depth of the undercuts as small as possible to be able to, in addition to the guides with-undercut Flanks a closely toleranced parallel guidance can be provided.

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The undercuts can be dovetail-shaped be. The undercut elanks can, however also have perpendicular to the wedge surface sections with a height that is at least the height of the ribs on the Corresponds to wedge surfaces. A strip of small width and height can be along the upper edges of the flanks of the tongue be integrally formed and along the lower edges of the flanks of the groove can be a recess with a depth accordingly the width of the bar on the flanks of the tongue and a height greater than the sum of the height of this bar and the Height of the ribs can be provided on the wedge surfaces.

Another possibility to prevent the wedge bodies from separating perpendicular to the wedge surfaces is to that on the sanders of the wedge body strips are provided with undercuts running parallel to the wedge surfaces are and that additional brackets are provided, x ^ elche the undercuts of both wedge bodies each with overlap a game that corresponds at least to the height of the ribs on the wedge surfaces. As brackets you can approximately C-shaped profile strips can be provided. The profile strips can consist of a resilient Made of material and be designed with one of its longitudinal edges so that it is under "bias" on the edge strip one of the two wedge bodies can be attached.

In order to create the possibility of attaching support elements according to the invention to a screw from the side, it is advisable, in the wedge bodies at the thin end of the section lying in the extension of the elongated hole to train breakable.

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The support height of a support element according to the invention can while the adjustment height remains the same, this is increased by the fact that spacer blocks which can be plugged onto the wedge body are provided which are provided with the elongated holes corresponding to the elongated holes in the wedge bodies. The connector between the wedge bodies and the spacer blocks or between spacer blocks is preferably designed to be clamped, In particular, recesses are provided in the outer surfaces of the wedge body, into which the projections Spacer blocks can be inserted by clamping.

In a second basic execution form are the two cooperating support bodies are designed as bodies which can be rotated relative to one another, the wedge surfaces are designed as helical surfaces on which the ribs are each formed radially to the axis of rotation. One or more helical sections may be provided. A statically determined support can thereby be achieved be that three helical segments are provided, each over an angle of rotation of 120 extend.

The support bodies, which can be rotated relative to one another, are preferably connected to one another via connecting links » which prevent a separation of the support body in the direction of their axis of rotation, but an axial displacement over the allow the entire height adjustment range.

The invention is illustrated in the drawing, for example, and in the following in detail with reference to FIG Drawing described.

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OWGWAL INSPECTCO

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Fig. 1 shows in an exploded state a support element according to the invention of two Wedge bodies.

Pig * 2 shows a top view of the wedge face one of the wedge bodies according to Fig.

Fig. 3 shows a plan view of the support surface of a wedge body of a support element according to Fig. 1.

Fig. 4 shows a wedge body seen from the narrow side.

Fig. 5 shows on an enlarged scale the arrangement and design of the ribs on the wedge surface.

Fig. 6 shows a spacer block for use with a support element according to Fig.

Figs. 7 and 8 show two more in cross-section Embodiments of support elements with Wedge bodies.

Fig. 9 shows another embodiment of a Support element with two wedge bodies seen from the side.

FIG. 10 shows a section along the line X-X in FIG. 9.

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Fig. 11 shows a partially sectioned second embodiment with mutually rotatable Support bodies.

FIG. 12 shows a plan view of the support element according to FIG. 11.

FIG. 13 shows a plan view of the lower support body of the embodiment according to FIG. 11.

The support element shown in side view in FIG. 1 2 has two wedge-shaped support bodies 4, 6 with bearing surfaces 8, 10. The facing Surfaces 12, 14, hereinafter referred to as wedge surfaces. have an angle of inclination «K, which is common to both support bodies is equal to. Ribs 16, 18 lying transversely to the slope are provided on the wedge surfaces 12. The hip ones 16 and 18 are each designed identically in such a way that the ribs on the two wedge surfaces 12 and 14 interlock positively or comb with one another.

The transverse ribs 16 and 18 preferably have, as shown in FIG. 5, a sawtooth-shaped cross section, wherein the steep flank 20 of the rib in the slope direction (Arrow A) lies behind. In this way the two with their wedge surfaces lying on top of one another supporting bodies with little resistance in the direction of the slope ν travels ν to one another on the flat flanks 22 sliding relative to one another be shifted other, while the steep flank 20 positively a movement of the two support bodies against each other prevented in the opposite direction. The wedge

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surfaces can therefore also have an angle of inclination be formed, which is much larger than the self-locking angle. Due to the ribs the height adjustment of the support element in stages, The height adjustment for each step is dependent on the angle of incline and the width of the rib.

Vie from the plan view in Fig. 2, the support body 6 is symmetrical to its longitudinal axis with a Long hole 24- provided. In the middle position, in which the ends of the support bodies are aligned with each other, are in alignment also the elongated holes of the support bodies lying one above the other. With the elongated holes 24- the support element can a screw or a bolt can be attached, for example, a strip or a profile on a Support surface attached to the ground. By shifting the two support bodies in the direction of their slope, the desired or required spacing of the support surfaces 8 and 10 des composite support element and thus the support height can be set. After this setting, the part to be supported can then with the screw against the support element attracted to ground, which then forms a dimensionally stable spacer or a dimensionally stable pedestal. The fact that the support bodies are fastened on the screw enables easier assembly.

The total possible longitudinal adjustment of the two support bodies relative to one another and thus the total The height difference that can be bridged depends on the slope of the wedge surfaces and the length of the elongated hole 24 ·. Multiple

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it is necessary to push the support body laterally under an element to be supported. To also here the Possibility to enable the desired support in the immediate vicinity of a fastening element the support body at its thin end as an extension of the elongated hole 24 · with weak points or predetermined breaking points 26 so that the piece delimited by these predetermined breaking points / can be broken out of the support body « The elongated hole 24 thus becomes the thin side of the support body open and the support body can thus be pushed radially over a screw or a screw bolt.

Additional plates 28 can be provided for bridging larger distances or for greater support heights. the outer dimensions of which correspond to the dimensions of the bearing surfaces 8 and 10 of the support body, and they likewise are provided with an elongated hole corresponding to the elongated hole 24 of the support body. Again, at one end of the Long holes a predetermined breaking point 30 are provided, so that even with these plug-on plates 28, the elongated hole can be exposed to one side.

Pins 34 are provided as connecting elements on the one surface 32 of the spacer plate 28, with bores 36 aligned with them opposite on the opposite side. Corresponding bores 35 are arranged in the bearing surfaces 8 and 10 of the support elements 4 and 6. The pins and holes are designed ₄ so that the parts can be connected by clamping. These clamp connections can be designed in various ways »

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The arrangement of the fasteners should be asymmetrical if it is to be ensured that the breakaway plate element 30 of the spacer plates 28 over the breakaway Sections 27 of the support body is located.

In the embodiment described, a plan view of a spacer plate 28 according to FIG. 6 corresponds, for example the top view of the support body 6 in Fig. 3-

In order to ensure an optimal surface load in the wedge surface during assembly, a lateral shift must be made the support body can be prevented relative to one another. This occurs to a certain extent when mounting on screws through the elongated holes 24-. Un a side guide even then To ensure that no mounting screws are used, parallel guides are useful in the target areas intended. For this purpose, as shown in the drawing, springs 38, 40 and grooves 42, 44 can be provided « In the embodiment according to FIGS. 1 to 4, there is a spring 40 and a hat 44 on each support body intended. The feathers and springs can be provided with undercuts at the same time, for example as shown in Fig. 4, be dovetailed. In this way, the two support bodies at the same time secured against lifting from one another perpendicular to the wedge surfaces. The undercuts are to provide each with so much play that they allow a lifting of the support body from each other by the height of the transverse ribs.

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If the height H of the thick wedge end is provided as the smallest height of the support element, the spring 38 or 40 are cut off in the area of this wedge end so that the height H is not exceeded. At the thick wedge end, the spring must be bevelled along line 46 or 48.

Instead of two hat and tongue pairings, as in the embodiment according to FIGS. 1 to 4, a tongue and groove pairing can also be provided, as shown in FIGS. 7 and 8. In the embodiment of FIG. 7 ¹ lower support body 50 is dft provided with a spring 52 and the upper support body 54 having a hat 56th Tongue and groove are each symmetrical to the longitudinal center axis 53, which is also the longitudinal center axis of the elongated hole 60. As shown in FIG. 7, a certain amount of play is provided between the flanks of the tongue 52 and the flanks of the groove 56, which clearance allows the height of the ribs to be lifted off. For the purposes of the invention, a relatively small undercut on the order of a few tenths of a millimeter is sufficient. Extremely small undercuts are sufficient to secure the support bodies against separation if a closely-tolerated parallel guide with vertical flanks is also provided, as is given in FIG. 7, for example, by the ribs 62 on the upper support body 54. In the embodiment according to FIG. 7, transverse ribs can be provided in the two contact planes 64 and 66.

A modified embodiment, in which at the same time a close parallel guidance and an effective against lifting Undercut is provided is shown in FIG. 8.

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The upper support body 68 is provided here with an axisymmetric spring 70, while the lower support body 72 an axisymmetric groove is formed 74- "The edges of the spring 70 and the groove 7 ^ - are here in the areas adjacent to the wedge surfaces portions 76 of the spring 70 and 78 in the groove 74 perpendicular to the wedge surfaces. At the outer end of the tongue, the flank is provided with a projection 80 and the flank of the groove is provided with a recess 82. If a total clearance of 1/10 millimeter is selected for the parallel flank sections 76 and 80, a width of about 1/10 millimeter is sufficient for the protruding bar 80 or the recess 72 to secure the parts against lifting. In Fig. 8, the two support bodies are shown in a position in which the ribs 80, 86 are moved away from one another. The height of the recess 82 in the groove flank must therefore be selected so that the bar 80 on the flank of the tongue can move up and down by a corresponding amount.

As stated above, undercuts of the order of magnitude are sufficient as a safeguard against lifting off a few tenths of a millimeter. This is of particular importance if the support elements according to the invention are injection-molded made of plastic. Many plastics in question have such a high elasticity that that the cores provided with the undercuts transversely can be drawn to the undercuts under deformation of the plastics x ^ ground. But that makes it possible, too Support body with undercuts in a simple two-part shape, optionally using Ejector pins to inject.

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■ üie production of the parts by injection molding Plastic also has the advantage that the ribs are given the required dimensional accuracy.

Another way to counter the "two support bodies." Secure take-off is shown in FIG. 9. Here, the two support bodies 88 and 90 are laterally provided with guide strips 92, 94- which are parallel to the wedge surfaces extend and in each of which grooves 96, 98 are formed are. As a lift-off protection and parallel guidance is here a inclined strip 100 with a C-shaped curved cross-section is provided, which preferably has one leg 102 engages clamping into the groove 98, while the other Leg 104 engages in the groove 96 only so far that the Parts can perform a movement at rib height perpendicular to the wedge surface. In Fig. 1C is still at the same time once a close-tolerance parallel guide with a tongue 106 and a groove 103 is indicated.

Another embodiment of a height-adjustable support element according to the invention is shown in FIGS. An upper support element 110 is here rotatable about an axis 114 relative to a lower support element 112. At least one helical helical surface 116 is provided between the two support bodies 110 and 112, on which ribs radially intermeshing with one another, preferably ribs with a sawtooth cross-section, are formed. The helical helical surface is to be regarded as a curved wedge surface. In the embodiment shown, the upper support body 110 engages with a pin 118 in a bore 120 of the lower support part

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a. This pin is hollow and provided with an inner flange 122 at its lower end. A bushing 124 is provided as a connecting element for the two support elements and is provided with an outer flange 126 with which it is guided in a bore 128 of the upper support part 110. The lower end of bushing 124 is fixedly connected to the lower support body 112 _s, for example, pressed by means of press fit in a corresponding bore. In this embodiment, the upper and lower support bodies can be adjusted relative to one another by the amount A in the axial direction. This hatred determines at the same time the usable slope of the helical surface between the two bodies.

It is advisable to at least avoid tilting moments to provide two correspondingly offset helical helical sections; it is useful to provide three spiral sections, as indicated in the drawing with the three spiral sections I, II and III. At a safe distance from the top of each In the spiral section, a stop can be provided which prevents over-turning and a sufficient remaining support surface for power transmission.

Since the ribs each lie on radii, their width increases towards the outside in a wedge-shaped manner, as in 13 can be seen.

The support bodies in the embodiment according to FIG. 11 can be cylindrical on their outer circumference. To facilitate handling, the scope

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however, it can also be knurled or formed as a polygon. The support element according to FIGS. 11 to 13 can also be combined with additional spacer plates, each of which can be clipped onto the support body at the bottom or top. In Fig. 12 is a slip-on plate 130 shown, on the upper side of which a cross 132 is formed is. With such a spacer plate, the support element can be used, for example, as a pedestal for laying slabs, the cross beams determine the distance between the eyes.

In Fi s · - 11 the overall pitch is helical Helical surface indicated with S. A should be essentially 8. If the immersion depth t of the pin 113 is not sufficient to ensure the leadership over the entire slope S, the ring rib shown in dashed lines 134- provided xierden, through which the diving depth on the cash register T.

Screws can be inserted through the interior of the socket 124. If such a screw fastening should not be provided, a solid pin can be provided instead of the socket 124.

The support element according to FIGS. 11 to 13 has the advantage that no undercuts are provided perpendicular to the axis of rotation Need to become. Also the part of this support element can therefore be easily molded in a two-part mold.

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In order to avoid undesirable accumulations of material when producing the erfindungsgeinä3en support elements by injection molding of plastics, the support body <jev be provided with recesses and to achieve the necessary strength required Yerrippungen ^r Eils can.

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Claims (1)

Patent claims: f 1. Height-adjustable support element with two cooperating Support bodies with wedge surfaces of the same slope, characterized in that the support bodies (4, 6; 110, 112) are provided on their wedge surfaces with ribs of a small height that are located transversely to the slope and mesh with one another are. 2. Support element according to claim 1, characterized in that the transverse ribs 16 _} 18 are formed with a sawtooth-like cross-section, wherein the steeper flank (20) of the rib is formed in the direction of slope in each case on the back of the rib. 3 · Support element according to claim 1 or 2, characterized in that that the supporting body are designed as a wedge body (4, 6) and that the wedge bodies are provided with elongated holes (24) which extend in the longitudinal direction of the slope. 4. Support element according to claim 3 *, characterized in that that the wedge body (4, 6) with itself in the slope direction extending parallel guides (40, 44) are provided. 5 · Support element according to claim 4, characterized in that that the parallel guides are formed in / on the wedge surface of the wedge body «, 6. Support element according to claim 4 or 5 »characterized in that grooves (44, 56,? 4) and springs (40, 52, 70) are provided., BÜ9843 / 0209 - 13 - 2 SIb! 29 7. Support element after. Claim 6, characterized in, that at least two oppositely directed flanks the grooves (44-, 56, 74) and tongues (40, 52, 70) undercut are trained. 8. Support element according to one of the preceding claims, characterized in that a hat (42, 44) and a spring (33, 40) is provided. 9 · Support element according to claim 6, characterized in that that in the wedge surface of one wedge body (54, 72)! at least one hat and on the wedge surface of the other Wedge body (50, 6S) at least one spring (52, 70) is trained. 10. Support element according to claim 9, characterized in that the groove (56, 64) and the spring (52, 70) each in Are penetrated longitudinally by the elongated hole. 11. Support element according to claim 6, characterized in that that in each case a tongue and a groove is provided which are substantially symmetrical to the longitudinal center line of the Wedge body is arranged. 12. Support element according to claim 11, characterized in that that the width of the spring (52) corresponds approximately to half the width of the wedge body or the wedge surface. B09843 / 02Q9 "/ b \ b ! I Ü Support element according to Claim 12, characterized in that the flanks of the hat (56) "and the spring (52) are mutually exclusive are formed undercutting. Support element according to one of the preceding claims, characterized in that the undercuts so are dimensioned that the wedge body perpendicular to the wedge surfaces at least by the height of the ribs from each other can be withdrawn. 15 · Support element according to claim 13, characterized in that that in addition to the guides with undercut Flanks a close-tolerance parallel guide is provided. 16. Support element according to claim 13, characterized in that that the undercuts schv: al "oenschv; an- / fö: mig developed are. 17 · Support element according to claim 14, characterized in that the undercut flanks are perpendicular to the wedge surface have lying sections with a height that \ ^ at least corresponds to the height of the ribs on the wedge surfaces. 18. Support element according to claim 17, characterized in that along the upper edges of the flanks of the spring (70) a strip (80) of small width and height is formed and that along the lower edges of the flanks of the groove (74) a recess (82) with a depth corresponding to the width of the saddle on the flanks of the spring and a Height greater than the sum of the height of this bar and the height of the ribs on the wedge surfaces is provided. i \ 0 9 8 U 3/0 2 0 9 19 · Support element according to claim. 4-, characterized that on the hands of the wedge body (83, 90) strips with Undercuts (96, 93) running parallel to the wedge surfaces are provided and that additional Brackets are provided which overlap the undercuts of both wedge bodies with a clearance, that corresponds at least to the height of the ribs on the wedge surfaces. 20. Support element according to claim 19, characterized in that that the brackets (100) are designed as C-shaped profile strips. 21. Support element according to one of the preceding claims, characterized by spacer blocks which can be plugged onto the wedge bodies and which have the elongated holes in the wedge bodies corresponding Langlöohsrn are provided. 22. Support element according to one of the preceding claims, characterized in that in the wedge bodies whose thin end or in the wedge bodies a section (27, 30) lying in the extension of the elongated hole Is designed to be stamped out. 23 · Support element according to claim 22, characterized in that that on the opposite surfaces of the spacer blocks (28) aligned projections or «recesses and in the outer surfaces of the wedge body recesses are also dimensioned or formed so that the Spacer blocks can be connected to one another or to the wedge bodies in a clamping manner. h (j 9 8 / »3/0 2 ΰ 9 7 S I ί. IVi] 24. Support element according to claim 1 or 2, characterized in that that the support body is designed as two bodies rotatable relative to one another about a common axis are, wherein the contact surfaces are designed as helical helical surfaces, in or on which radially the ribs are arranged. 25 · Support element according to claim 24, characterized in that that the helical! Helical surfaces are formed multiple times. 609843/0209