EP1286008A2 - Length adjustable prop - Google Patents

Abstract

The support has locating holes (22) on the inner pole, with letters, symbols or numbers (24) imprinted or stamped either adjacent at 90 degrees to or between the holes. Both the inner and outer poles (20,14) have an annular cross-section. The symbols run along the length of the inner pole periodically. The symbols are located every 10 to 20 mm, and preferably about 15 mm in the axial direction. An adjustment sleeve (36) is located on the support for fine adjustment of the length. A milled or knurled area (30) extends longitudinally, surrounding the symbols. The locating holes are punched out from a galvanised metal strip and then the symbols, letters or numbers are imprinted. The strip is then formed into a desired shape i.e. a pole and then welded together.

Description

The invention relates to a length-adjustable support, in particular ceiling prop for formwork, comprising a hollow outer profile, in which an inner profile is axially displaceable is arranged, wherein the inner profile a variety of Has pegging holes.

Adjustable supports are used in particular in construction used for slab formwork on a variety adjustable supports can be placed. To get one on a variety of length-adjustable supports The exact length of the slab formwork must be adjusted individual supports can be set very precisely. Usually the length-adjustable supports are fine-tuned additionally with the help of a suitable Leveling instrument.

International application WO 93/20 311 discloses one adjustable support according to the generic term of Claim 1 and describes a height-adjustable support for Formwork in construction, on the outer circumference of the inner tube a scale is arranged in the longitudinal direction. This can the length-adjustable support without any additional aids the desired length can be set because the respective Read the total length of the support directly and open the support the desired gauge block must be set to the centimeter.

The provision of a separate measurement scale can be done by the Attach a tape measure by printing one or done by impressing a scale. The Attaching a measuring tape requires your own Manufacturing step to attach the same by a separate tape measure intensely with the support over the entire Length is connected and is protected from the fact that the Telescoping the prop is damaged or becomes illegible. The same applies to the printing of a scale on the Support where the pipe has to be degreased before printing, because otherwise no color sticks. Imprinting a scale turns out to be difficult because of the fine scale Subdivision is difficult to read and also the embossing on a finished round tube is difficult and expensive.

In conventional manufacturing processes for length-adjustable supports, in particular ceiling supports the final step is galvanizing. This will mark, z. B. embossing, too indistinct so that they are only for the site staff are difficult to recognize and are often not used.

The invention has for its object an integrated Propose adjustment aid for telescopic supports that is simple is to manufacture and a simple rough adjustment one adjustable support allowed.

This object is solved by the features of claim 1.

These deformations of the wall of the inner profile are simple manufacture, because the deformations in one operation at the same time as punching the peg holes in the flat Sheet metal strip can be carried out. Providing one coarse, clearly visible embossing makes it easier Intended use of the length-adjustable support and allows easy length adjustment the same.

Only by galvanizing the metal strips before embossing the A support can be produced to create optically effective deformations become visible, their optically effective deformations are recognizable. The galvanizing is the last step carried out, the embossments become so indistinct that they no longer serve their purpose. The clear readability requires changing the process flow more traditionally Production method.

According to a preferred embodiment, both hollow outer profile and the inner profile an annular Cross-section. By both the outer profile and that Inner profile as tubes with coordinated Formed diameters, the sheet metal strip with the punched out holes as well as the molded Deformations easily deformed into a round tube and be welded.

According to a preferred embodiment, they are optical effective deformations or stamped. Either an embossing in which a deformation within the wall of the processed material, as well as deep embossing, where the wall of the processed material deforms itself as well as punching are easy to do Manufacturing processes that work together with the formation of the Stake holes can be made. Therefore, under Use one of the above molding processes the optically effective deformations in the production of the Inner profile can be integrated. Another advantage lies in that the durability of the deformations thus formed is equal to the life of a length-adjustable support.

According to a preferred embodiment, they are optical deformations in the immediate vicinity of the Stake holes arranged. This has the advantage that the operating personnel the subject of the invention on very can handle easily. To make a rough adjustment of the To make the length of the adjustable support, everyone will coarsely adjustable supports except for a peg hole pulled out of the same marker.

If the optical deformations are 90 degrees radial staggered to the peg holes, this comes an ergonomically favorable attitude of the operating personnel counteracting this by the optically acting deformations Has eyes and a safety pin from the side into one can insert the desired peg hole.

The optically effective deformations are preferably in one periodically recurring sequence along the inner profile arranged. For this, there is a preferred Embodiment, the optically acting deformations in Form of the digits 0 to 9 or in the form of letters or Form symbols. This can be a rough setting several spaced apart adjustable in length Supports, which are each brought to the same rough dimensions should be simplified by making all the length adjustable For example, prop up to one with the letter D marked peg hole. At a periodically recurring sequence of numbers from 0 to 9 is true a mix-up of marked out holes possible due to the relatively large distance from Stakeout holes with the same marking, however unlikely.

The optically effective deformations preferably have a Expansion with respect to the axial direction of the inner profile of 10 mm to 20 mm, preferably about 15 mm. This is one given sufficient size to visually see the deformations easily recognizable, at the same time the deformations however not so large that it becomes a notable one Weakening of the inner profile comes.

According to a preferred embodiment, the support has a Threaded spindle for fine adjustment. By providing a threaded spindle for fine adjustment can length-adjustable support according to the invention to an exact Length measure. This allows one on one Large number of adjustable formwork supports using a measuring device such as one Leveling device, through the fine adjustment of the individual, load-bearing, length-adjustable supports in a desired Location.

Knurling preferably runs in the longitudinal direction of the Inner profile in the area of optically effective deformations. This can be in different knurls and corrugations be executed over the entire length of the inner profile are arranged and highlighting the optical Deformations in the form of the embossed markings serve.

Fig. 1

ein Ausführungsbeispiel einer erfindungsgemäßen längenverstellbaren Stütze;

Fig. 2

das Innenprofil einer anderen Ausführungsform einer erfindungsgemäßen längenverstellbaren Stütze; und

Fig. 3

eine Schnittdarstellung des in Fig. 2 gezeigten Innenprofils entlang der Linie A-B;

Fig. 4

ein weiteres Ausführungsbeispiel einer erfindungsgemäßen längenverstellbaren Stütze; und

Fig. 5a, 5b, 6a, 6b

die Anordnung von Rändelungen und optisch wirkenden Verformungen in bezug auf die Abstecklöcher einer erfindungsgemäßen längenverstellbaren Stütze darstellen.

The invention is described below purely by way of example with reference to the accompanying drawings, in which:

Fig. 1

an embodiment of an adjustable support according to the invention;

Fig. 2

the inner profile of another embodiment of a length-adjustable support according to the invention; and

Fig. 3

a sectional view of the inner profile shown in Figure 2 along the line AB.

Fig. 4

a further embodiment of a length-adjustable support according to the invention; and

5a, 5b, 6a, 6b

represent the arrangement of knurls and optically effective deformations in relation to the peg holes of a length-adjustable support according to the invention.

In Fig. 1 a length-adjustable support is shown, the is generally designated by reference number 10. The length-adjustable support consists of a base plate 12, which is rigidly connected to an outer profile 14, for example by a circumferential weld seam. in the The illustrated embodiment is the outer profile 14 in Formed a tube, d. H. has the outer profile 14 an annular cross section. In the outer profile 14 axially An inner profile 20 is slidably arranged, the upper one front end rigidly connected to a head plate 16 is, for example by a weld. On the Head plate 16 are the formwork elements that are usually supported with the aid of an adjustable support 10 be put on. Of course it is adjustable support 10 but also for a variety suitable and usable for other applications.

The inner profile slidably arranged in the outer profile 14 is formed in terms of its outer dimension that it on the one hand, can be easily inserted into the outer profile 14, on the other hand also through the inner wall of the outer profile to be led. Therefore, in the illustrated embodiment also formed the inner profile in the form of a tube and has an annular cross section.

As shown in FIG. 1, the inner profile 20 has a variety of. Stake holes 22, which are essentially in equal distance from each other and with respect to their axes are formed parallel to each other in the inner profile.

As can be seen from Fig. 1, are on the outer Circumferential surface of the inner tube 20 optically acting Deformations 24, the outer in the example shown Have the shape of the digits 8 and 9. This optically acting Deformations, like those in the others Embodiments shown optically acting Deformations are preferably caused by embossing, i.e. H. one Deformation within the wall of the pipe due to deep Embossing, d. H. a deformation of the wall of the tube, or formed by punching.

The advantage of embossing or punching the optically acting Deformation lies in the fact that the Production process for the inner profile very simple and therefore can be designed inexpensively. As explained above the inner profile 20 is preferably formed by that a flat sheet metal strip is deformed into a round tube and along the resulting longitudinal seam is welded. Punching the Holes are made in the flat sheet metal strip, so that the manufacturing the adjustable length support according to the invention additionally the shaping of the optically effective deformations is required.

These optically effective deformations can be done in one common work step, or directly downstream work step, during or after punching the peg holes. This means that the flat sheet metal strip before it is deformed into a round tube and is welded with the punched out holes as well as punched optical markings or with the punched peg holes and embossed optical Markings.

A rough adjustment of that shown in Fig. 1 adjustable support 10 is made by a provided bolt through the pin hole 22 in Inner profile 20 is inserted and usually against unintentional falling out is secured.

Fig. 2 shows an inner profile 20 in the form of a tube in which the optically effective deformations in the form of numbers each are arranged in the vicinity of a stake hole 22.

In contrast to that shown in Fig. 1 Embodiment in which the optical markings radially offset by 90 degrees to the longitudinal axis of the peg holes are arranged, these are in that shown in Fig. 2 Inner profile 20 in the axial direction over the associated Setting holes arranged.

From the two shown in Fig. 1 and Fig. 2 Embodiments it is clear that any Arrangement of the optically effective deformations relative to the respective pegging holes is possible and it in the same It is also conceivable that two peg holes each an optical marker between the two be marked.

While shown in Figs. 1 and 2 Exemplary embodiments each have optical markings in the form can be represented by any number Have shape and, for example, different geometric Shapes or symbols such as polygons, circles, ovals, Line markings or the like, but also various Letters or a combination of the above Opportunities.

FIG. 3 shows a cross section through that in FIG. 2 inner profile 20 shown along the line A-B. The The representation scale of FIG. 3 does not correspond to that of FIG. 2. The sectional view shown in FIG. 3 becomes clearly that the inner profile 20 from a thin-walled tube exists that has a weld seam 26 in the longitudinal direction. While inside the tube a little There may be weld overhang, the steel pipe planed on the outside so that the weld seam does not protrude forms the outer surface.

As can be seen from Fig. 2, the optically acting Deformations in the axial direction of the inner profile 20 over the Stake holes 22 arranged. These indentations can, like already explained above, only within the wall of the tube, but also to a deformation of the entire wall thickness of the pipe. That in Fig. 3 The example shown shows a deep embossing in which the Wall of the tube is deformed. As from the drawing can be seen, forms along the inner circumference of the Pipe an inward bulge 24 of the Inner profile 20, which is characterized by the deep embossing in the form of Number 1 mark formed in Fig. 2 is generated.

Fig. 4 shows a further embodiment of a adjustable support according to the invention. Here are corresponding elements with the same reference numbers as in 1 and 2 provided. The one shown in Fig. 4 The embodiment differs from that in FIG. 2 shown in that a knurling or corrugation 30 in Longitudinal direction of the inner profile 20 in the area of the optical acting deformations. These knurls or Corrugations 30 serve the optical deformations in To emphasize the shape of the embossed digits 24 optically.

In the exemplary embodiment shown, the outer profile is 14 provided with an elongated hole 32 through which the Locking pin it reaches through. The elongated hole serves one Fine adjustment using an adjusting sleeve 36 too allow on an external thread of the outer profile 14th is applied and axially displaceable on this. By the turning of the adjusting sleeve 36 becomes axial relative to it Outer profile 14 moves, the one on the top of the Adjustment sleeve 36 overlying pins 34 also with this is also moved, whereby a fine adjustment of the Total length of the telescopic support is reached.

5a shows a side view of a section of the Inner profile 20 with a pin hole 22 and assigned optically effective deformations 24 in the form of the number 1. How 5a can be seen, they are optical deformations 24 not only directly to the stake hole 22 assigned, but also offset by 90 ° in the same way this. Each in the area of optically effective deformations 24 is a corrugation 30 along the marking 24 of the inner profile applied. This can regardless of Position of the operator the extent of the extension of the telescopic support be clearly recognized from every side.

Fig. 5b shows a horizontal in the installed position Section through the inner profile shown in Fig. 5a through the Center of the peg hole 22. In Fig. 5b are the Areas with knurling or corrugation applied as dash-dotted lines shown. These run each time in the area of the pin holes 22 and 90 ° offset to these. The width of the knurls or corrugations 30 can be determine the area through the center angle α is between 10 ° and 30 °, preferably about 20 °.

6a and 6b is a further embodiment an adjustable support according to the invention shown. The section shown here in Fig. 6a and section in FIG. 6b correspond to those in FIGS. 5a and 5b representations shown. As can be seen from Fig. 6a, the knurling or corrugation runs on both sides of the Stake hole 22. The symbols that are just above the in Fig. 5a Hole are arranged here on both sides of the Hole and in the middle of this. As can be seen from Fig. 6b is four dash-dotted lines on the circumference of the inner profile represented zones with an applied knurling or Corrugation provided at roughly equal intervals are arranged to each other. Independent of The viewing direction is also the one in FIGS. 6a and 6b illustrated embodiment each set Recognizable length of the inner profile.

The illustrated in the above embodiments Marking the peg holes is based on the knowledge that to formwork a ceiling of the same height adjustable floor props all of the same length are to be set. It is therefore sufficient to use one of these supports by measuring to the correct height and then the bolts of all other supports in the layout hole are the same Stake out the mark.

The roughly adjusted supports are then in the installed state with a leveling device to the exact Height set up, with intermediate supports that are rough are set without calibrating against that already installed formwork beams can be pressed.

For this purpose, the inventive adjustable support an adjustable sleeve for Fine adjustment of the length. In addition to that shown in FIG. 4, can do such fine adjustment in different ways take place that are known in the prior art. So it can length-adjustable support at the upper end of the outer profile 14 have a thread, preferably a trapezoidal thread which is an adjusting sleeve. On this adjusting sleeve is the locking pin, which is guided through the locking hole 22 will be on. When the bolt is inserted, it can now be turned the sleeve on the external thread of the outer profile 14 the sleeve are axially displaced and thus the inner profile 20 over the pins on the sleeve axially displaced become. This enables a fine adjustment of the total length of the adjustable support possible.

Since the length-adjustable support 10 is one in large number of items required are both the outer profile as well as the inner profile preferably Made of mild steel.

The production of the tubular inner profile 20 as well as the tubular outer profile 14 is preferably carried out via the Deform a flat sheet metal strip. In the manufacture of the Galvanized strips are used in the inner profile in the front the manufacturing of the pipe profiles, the peg holes punched and simultaneously or in an immediately following one Work step clearly visible markings are embossed. Then the galvanized strips are profiled without to destroy the embossing. Finally, the won profiles, e.g. B. in the form of a round tube, in Welded longitudinal direction of the profile. Lastly, you can Post-processing steps, such as machining the weld connect by planing.

Only by galvanizing the metal strips before embossing a prop can be made, the markings of which are clear are recognizable. The galvanizing is the last step carried out, the embossments become so indistinct that they no longer serve their purpose. The clear readability requires changing the process flow more traditionally Production method. To make the optical deformations clear To be able to emphasize has a knurling as proven to have a depth of about 0.2 mm and a 1.3 mm pitch.

Claims (11)

Length-adjustable support, in particular ceiling support for formwork, comprising a hollow outer profile (14) in which an inner profile (20) is arranged to be axially displaceable, the inner profile (20) having a plurality of pegging holes (22) and its outer wall surface having optically effective deformations,
characterized in that a respective optically effective deformation (24) is exclusively assigned to each stakeout hole (22), so that a simple rough adjustment of the support is achieved by extending the support up to a stakeout hole (22) to which a certain optically effective deformation ( 24) is assigned, is pulled out. Length-adjustable support according to claim 1,
characterized in that
the hollow outer profile (14) and the inner profile (20) have an annular cross section. Adjustable support according to claim 1 or 2,
characterized in that
the optically effective deformations (24) are embossed or stamped. Adjustable support according to one of the preceding claims,
characterized in that
the optically effective deformations (24) are arranged in the immediate vicinity of the peg holes (22). Adjustable support according to one of claims 2 or 3,
characterized in that
the optically effective deformations (24) are arranged radially offset by 90 degrees to the setting holes (22). Adjustable support according to one of the preceding claims,
characterized in that
the optically effective deformations (22) are arranged in a periodically recurring sequence along the inner profile (20). Adjustable support according to one of the preceding claims,
characterized in that
the optically effective deformations (24) have the shape of the digits 0 to 9. Adjustable support according to one of claims 1 to 6,
characterized in that
the optically effective deformations (24) have the shape of letters or symbols. Adjustable support according to one of the preceding claims,
characterized in that
the optically effective deformations (24) have an expansion with respect to the axial direction of the inner profile of 10 mm to 20 mm, preferably about 15 mm. Adjustable support according to one of the preceding claims,
characterized in that
the support has an adjusting sleeve (36) for fine adjustment of the length. Adjustable support according to one of the preceding claims,
characterized in that
knurling or corrugation (30) runs in the longitudinal direction of the inner profile (20) in the region of the optically effective deformations (24).

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