EP0139820B1 - Scaffolding for curved surfaces - Google Patents

Scaffolding for curved surfaces Download PDF

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Publication number
EP0139820B1
EP0139820B1 EP84104458A EP84104458A EP0139820B1 EP 0139820 B1 EP0139820 B1 EP 0139820B1 EP 84104458 A EP84104458 A EP 84104458A EP 84104458 A EP84104458 A EP 84104458A EP 0139820 B1 EP0139820 B1 EP 0139820B1
Authority
EP
European Patent Office
Prior art keywords
formwork
connecting piece
tie
locking
bolt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84104458A
Other languages
German (de)
French (fr)
Other versions
EP0139820A2 (en
EP0139820A3 (en
Inventor
Josef Maier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT84104458T priority Critical patent/ATE41965T1/en
Priority to ES534744A priority patent/ES8504314A1/en
Priority to NO843651A priority patent/NO159872C/en
Priority to DK442684A priority patent/DK157207C/en
Publication of EP0139820A2 publication Critical patent/EP0139820A2/en
Publication of EP0139820A3 publication Critical patent/EP0139820A3/en
Application granted granted Critical
Publication of EP0139820B1 publication Critical patent/EP0139820B1/en
Expired legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/06Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
    • E04G11/062Forms for curved walls
    • E04G11/065Forms for curved walls with mechanical means to modify the curvature
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/32Articulated members
    • Y10T403/32254Lockable at fixed position
    • Y10T403/32262At selected angle
    • Y10T403/32286Clamping screw traverses sliding complementary arcuate bearing surfaces
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/32Articulated members
    • Y10T403/32254Lockable at fixed position
    • Y10T403/32262At selected angle
    • Y10T403/32319At selected angle including pivot stud
    • Y10T403/32327At selected angle including pivot stud including radially spaced detent or latch component
    • Y10T403/32336Engaging notch or recess in outer periphery of component
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/32Articulated members
    • Y10T403/32254Lockable at fixed position
    • Y10T403/32262At selected angle
    • Y10T403/32319At selected angle including pivot stud
    • Y10T403/32368At selected angle including pivot stud including radial interengaging tongue and slot or serrations

Definitions

  • the invention relates to a formwork for circular structures with an adjustable formwork facing, which is fastened to the supports supporting it, and with bars which act on the girders at a distance from the formlining, form a locking chain, and have adjustable length bars, with adjacent locking bars of the locking chain are each connected via a connector arranged on a carrier and each bolt engages the connector via its own joint, which in turn is fastened to the carrier, the angular position of the bolts relative to one another being changeable by changing the length of the bolts and wherein the connector has a receiving area for in the bolt chain adjacent to each other connecting heads of the bolt.
  • Such formwork is already known from DE-B-24 26 708.
  • it is possible to set up and set the formwork quickly in which the individual formwork panels can be provided with supports and bolts from the outset.
  • For secure anchoring it is necessary that mutually opposing formwork ties are anchored to one another by formwork tie rods, so that the wall thus concreted contains perforations or formwork tie rods after its completion.
  • This is particularly undesirable in the case of round containers because they are often intended to serve as liquid containers and are intended to withstand a correspondingly high internal pressure from the stored liquid. Accordingly, components at risk of corrosion within such a container wall, such as formwork tie rods, or subsequently closed perforations for such formwork tie rods are highly undesirable.
  • DE-U-77 04 885 results in formwork of a different type, in which a lock chain is initially to be set with respect to the angular position of the individual locks and fixed by means of wedges, after which the connection to the actual formwork takes place. Not only is the setting and fixing by means of wedges more difficult and possibly also less secure than fixing with formwork tie anchors, but there is also an increased assembly effort when constructing such formwork.
  • connection pieces arranged on the individual supports of the formwork panels are included in the formation of the entire locking chain.
  • the joint lock which is effective between one end of a connecting piece and a bolt that engages it, enables both the stepless adjustment of the angular position of the bolt and the connecting piece to one another and a secure, form-fitting fixing of these parts to one another, so that a very precise adjustment of angular positions is possible and such high forces can be transferred that formwork tie rods between the opposing formwork panels are not required.
  • a sufficiently stable support of the formwork is obtained and its durability can also be checked comparatively well and safely: When all joint locks are in place and fixed, there is a positive connection in the entire locking chain in connection with the associated connecting pieces and the beams connected to them.
  • the connecting pieces expediently have a fastening back which is preferably matched to the profile of known or existing side members.
  • a fastening back which is preferably matched to the profile of known or existing side members.
  • longitudinal beams which are generally present in the case of corresponding construction companies, can easily be used to create the formwork.
  • the articulated locks belonging to the formwork each have an adjusting and fastening bracket, which is preferably designed as an essentially U-shaped profiled U-piece or the like, which engages over the bolt-near end of a connecting flange of a connecting piece his U-web has a plug pin, an insertion hole is provided for receiving this plug pin in the associated connecting flange of the connecting piece such that the articulated lock mounted in the connecting piece can adjust itself to the desired angular position of the bolt relative to the connecting piece, and that the articulated lock on the associated one Has locking attacking adjustment and fastening means.
  • the joint lock can automatically adjust itself to the respective angular position corresponding to the fastening position.
  • Special fasteners or the like for example, mounted in spherical caps, which enable adaptation to corresponding different angular positions, can be avoided, which is important for the rough operating conditions at the construction site.
  • the length-adjustable individual bolts provided for the formation of the bolt chain and the connecting piece which is provided between two adjacent bolts and which engages the longitudinal beams of the formlining can advantageously also be used to form a tension belt for holding an outer formlining.
  • the connectors provided there do not need to have the insertion holes for the plug pin or the like of the joint lock, but in principle the same connectors as are provided for the formation of the locking chain belonging to an inner formlining can also be used with this tension belt , in particular also corresponding, adjustable in length bar. This particular use has u. a. the advantage of economical storage.
  • Embodiments of the invention of advantageous importance, which allows a better transmission of high forces within the fixed locking chain, play, canting, deformation or the like. And in particular unwanted pivoting at the pivot points between the bolts and the connectors practically exclude, so that overloading the Bolts forming pivot points and the articulated locks can be avoided without the need for additional straps or tensioning screws or the like running parallel to the locking chains.
  • the connecting piece itself is part of the articulated lock or contains at least part of the articulated lock . In this way, occurring forces can be better absorbed by the joint lock and passed on to the locking chain or to the carrier. This results in a locking chain, the set angular position of which is retained with great certainty even with large forces, so that such a locking chain can simultaneously serve to set a fixed curvature, which is also retained under the concrete pressure, and as a belt.
  • An advantageous embodiment can be in such formwork with a locking chain formed from bolts and engaging connectors on the girders, that a toothing or the like is provided in different angular positions for fixing the bolts in their angular position relative to the connecting piece, whereby Teeth or the like. Protrusions on the connecting piece and matching tooth gaps or the like. Recesses on the bolts can be provided. The engagement and disengagement of the teeth not only allows the angular positions to be adjusted and set in small steps, but also advantageously transmits the pressure forces directly in the direction of the individual elements of the locking chain.
  • a toothing or the like can be provided on a circle around the swivel connection between the bolt and the connecting piece on the face side, and the bolt can have a locking piece axially adjustable by means of a nut as a joint lock with a concave curve on a threaded bolt belonging to it and have teeth or the like disposed therein which match the teeth or the like of the connector.
  • the nut axially supporting and holding this locking piece can be turned a few threads away from the toothing, so that the toothing can then be disengaged. Now a slight pivoting and then the reverse adjustment of the nut can be carried out, whereby a different angular position is set and fixed. The forces occurring are transmitted directly to the bolt or the connector via this locking piece.
  • the connector can - as in a previously mentioned embodiment - have two parallel connecting flanges, at least one of which has a toothing on the end face and between which the connecting head of the threaded bolt of the bolt fits and can be pivoted by means of a transverse bolt and on the threaded bolt belonging to the bolt, this can be done
  • Locking piece can be axially displaceable and can be supported by means of the nut arranged on the side facing away from the connecting piece and can be pressed on in the engagement position of the toothing or the like.
  • the locking piece can have a U-shaped cross-section, the U-cross bar has a perforation for the passage of the threaded bolt and the U-legs are concavely shaped on the end face, at least one U-leg being provided with counter teeth.
  • the teeth can be arranged parallel to the pivot axis between the bolt and the connector. It is particularly favorable if both connecting flanges of the connecting piece and both U-legs of the locking piece each have matching toothing or the like. Deformable deformations, because correspondingly greater forces can then be transmitted.
  • the locking piece on the bolt belonging to the bolt being rotatable through 180 ° and the U-legs alternately with the two flanges of the connecting piece in both rotational positions fit together in terms of their spacing and toothing.
  • the through holes can be gene in the U-transverse web of the locking piece with respect to a longitudinal center plane running through the center of a central tooth and / or the center of a tooth gap located in the center of the U-legs by a quarter of the width of the base of a tooth or the tooth pitch.
  • relatively coarse toothings which are expedient for good power transmission, can nevertheless be used to carry out relatively small steps in adjusting the angular position of the bolts. Namely, a step corresponding to half a tooth can be adjusted by rotating the locking piece by 180 ° due to the aforementioned displacement of the passage hole.
  • Another or additional measure for reducing the adjustment steps for a given toothing or even for stepless adjustment can be that the perforation in the U-transverse web of the locking piece has a play relative to the bolt, in which the diameter of this hole is at least half that Width of a tooth base or the tooth pitch is larger than the diameter of the bolt. This enables not only the rotation of the locking piece, but also a certain lateral offset, which can bridge the steps corresponding to the serrations during the lateral adjustment.
  • Another possibility of the infinitely variable adjustment with symmetrically arranged teeth can consist in the fact that the total play of the bolt in relation to the perforation on the U-crosspiece of the locking piece corresponds overall to the tooth pitch.
  • a combination of transverse adjustment of the locking piece relative to the bolt and adjustment of the corresponding teeth to one another can thus be carried out continuously.
  • the teeth and the tooth gaps can be approximately isosceles triangles or trapezoids in cross-section in order to interlock well when joining and locking.
  • a modified embodiment of the invention can consist in that a locking and / or clamping element is arranged on the connecting piece, acting as a joint lock on the two bars pivotable relative to the connecting piece, transversely to the bars and approximately perpendicular to the formlining , which engages positively and / or non-positively on the end faces of the bolts or the connecting flanges.
  • a locking and / or clamping element is loosened, the two latches engaging on a connecting piece can thus be set and then fixed in this position by the adjustment movement of the locking or clamping element.
  • fastening elements provided with inclined surfaces or threads can be provided for fixing the locking pieces or locking elements, which at the same time eliminate the play provided in the pivot bolts.
  • the nut provided as an axial contact of the U-shaped locking piece can be tightened in the locking position in the locking position until the clearance is eliminated within the pivot pin in the connecting piece.
  • Yet another embodiment can consist in that at the two pivot points of each bolt each act as an articulated lock acting on the traction screws, which engage with their other end on an adjacent connecting piece and there at a distance from the pivot point of the bolt.
  • these traction spindles are shortened more or less by tightening the threaded sleeves on two bolts more or less. It is expedient if the fastening back of the connecting piece comprising the carrier engages over the side walls of the carrier over more than the distance between the pivot point of the bolt and the point of application of the tension spindle and preferably has this point of application.
  • a triangle is thus formed between each bolt, a traction spindle serving as an articulated lock and the associated part of the fastening back of the connecting piece, which can absorb tensile and / or compressive forces accordingly.
  • the angles of this triangle are preselected by adjusting the tension spindle in particular.
  • a formwork designated as 1 for curved surfaces, walls, ceilings, round buildings or the like made of concrete has a flexible inner shuttering skin 2 and a likewise flexible outer shuttering skin 3. Between these two formwork skins 2 and 3, the concrete mortar to be installed later is drawn in in a short section and named 4.
  • the inner formlining 2 rests on inner longitudinal beams 5 arranged at a distance from one another. These in turn are supported against a bar chain designated as a whole by 6.
  • This has a multiplicity of elongate bars 7 which are variable in their length 1 and which are otherwise rigid and elongated.
  • the elongated individual bars 7, which are essentially straight with respect to their longitudinal axis, here also called bars 7, are arranged at an angle to one another or to a connecting piece 8 to be described.
  • adjacent bars 7 of the bar chain 6 are each connected via a connecting piece 8 arranged on a longitudinal member 5, and each bar 7 can be fixed in its angular position with respect to this connecting piece 8 by means of a joint lock designated as 9.
  • a joint lock designated as 9.
  • each bolt 7 has a clamping sleeve 11 provided with internal threads 10.
  • each bolt 7 has a matching threaded bolt 14.
  • connection head 15 which is clearly recognizable in FIGS. 3 and 4, is provided on these and has the shape of a regular prism with rectangular side surfaces 16 and rectangular end surface 17.
  • connection head 15 there is a perforation 18, which also pass through connecting flanges 19 and 20 of the connecting piece 8 (FIG. 4).
  • the connection heads 15 and thus the bolts 7 are connected to the connection flanges 19 and 20 of the connecting piece 8 by means of connection bolts 21.
  • This has a fastening back 22 which is matched to the profile 23 of known or existing side members 5.
  • connection flanges 19 and 20 of the connecting piece 8 form a receiving area, generally designated 25, for connecting heads 15 lying adjacent to one another in the locking chain 6.
  • the outline shape of this receiving area 25 is essentially U in the central area -shaped. Otherwise, the connection heads 15 match the clear width between the connection flanges 19 and 20 arranged parallel to one another.
  • FIG. 3 shows the top view and in FIG. 4 the front view of the articulated lock 9 shown enlarged in side view in FIG. 2. It is designed as an essentially U-shaped adjustment and fastening bracket in the side profile. On its U-web 27 there is a plug 28 and in the associated connecting flange 20 there is an insertion hole 29 therefor. For this purpose, the upper connecting flange 20 is extended a little beyond the lower connecting flange 19 in the direction of the two bolts, as can be seen from FIGS. 4 and 3.
  • Two adjusting and fastening screws 31 and 32 are provided on the U-legs 30 of the joint lock 9. The U-legs 30 protrude in the use position of the joint lock 9 in the region of the side surfaces 16 of the connection head 15 (Fig. 4).
  • connection head 15 can be adjusted and set in a desired angular position relative to the connecting piece 8.
  • This angle is clearly visible in FIG. 3, left side and is designated A. Since the outer diameter D of the inner formlining 2 (Fig. 1) is large in relation to the length 1 of the individual bolts, the angle amount A is also relatively small, so that the space required for the joint lock 9 and its adjusting and fastening screws 31, 32 without Difficulty in formwork are available; the corresponding force relationships in the connector 8 or the joint lock 9 can be controlled.
  • the joint lock 9 is fixed with respect to lateral displacements, but can practically automatically pivot into the position suitable for the respective position of the bolt 7 without additional measures, as can be clearly seen in FIG. 3. It is also advantageous in this embodiment that readjustments with respect to the angular position of individual bolts 7 can still be carried out without difficulty in the case of essentially finished formwork.
  • the length 1 can also be changed by rotating the clamping sleeves 11 of the individual bolts 7. It is in execution Example, the length 1 (Fig. 1) measured between the respective centers of the connecting bolts 21.
  • the joint lock 9 has a U-shaped stiffening bracket 33 in the side profile, which engages around the outside of parts of the U-legs 30 and the entire web 27 of the joint lock 9.
  • Fig. 3 it can be seen that at least the connecting flange 20 of the connecting piece 8 has an attracted, that is to say narrower side profile at its outer end 34, that is to say in the pivoting range of the articulated lock 9, so that space for the articulated lock U-legs 30 is available is.
  • outer longitudinal beams 105 can also be seen on the outer formlining 3, which are held by means of a tension belt, generally designated 40.
  • this tension belt is composed of bars 107 which can be changed in length L and of connecting pieces 8 'placed on the corresponding longitudinal beams 105'.
  • These connecting pieces 8 ' likewise have the perforations 18 and the connecting bolts 21 and joint locks 9 inserted therein and the insertion holes 29 provided for the plug pin 28 are not necessary here and are therefore not shown.
  • the bolts 7 described at the beginning can also be used as parts 107 of the tension belt 40 in connection with the connecting pieces 8 there.
  • the bolts 7 or 107 used for the bolt chain 6 or the tension belt 40 can be of the same design and can be set to different lengths 1 or L, but if necessary, bolts 7 and 107 formed with different basic lengths can also be used for different (inner) Bar chains 6 or 40 tension straps are used.
  • FIGS. 5 to 11 show a formwork 1 for curved surfaces or the like with a flexible, in particular convex inner formwork skin 2 and possibly also an outer formwork skin 3, which in turn has spaced-apart supports 5 which are against one of a Bolt chain 6 formed straps are supported, the bolts 7 of the bolt chain 6 in their length and their mutual angular position are in turn mutually adjustable and fixable and each engage the connectors 5 on which the pivot points of the bolt 7 are arranged in the form of connecting bolts 21 are.
  • the connecting piece 8 is itself part of the joint lock for fixing the latch in its respective angular position or contains at least part of this joint lock.
  • a toothing 35 is provided for fixing the bolt 7 in its angular position relative to the connecting piece 8, but another coupling which can be joined together in different angular positions could also be used instead of such a toothing 35.
  • teeth 36 or the like. Projections on the connecting piece 8 or the connecting flanges 19 and 20 belonging to it and matching tooth gaps 37 or the like. Recesses on the bolt 7 are provided.
  • the teeth 35 are provided on the end faces of the connecting piece 8 or its flanges 19 and 20 on a circle around the pivot connection with the connecting bolt 21 between the bolt 7 and the connecting piece 8 and with reference to Figures 6 and 7 it can be seen that the bolt 7 from the threaded bolt 14 belonging to it has an axially adjustable locking piece 39 by means of a nut 38 as part of the articulated lock with a concave curve and teeth arranged therein which match the teeth of the connecting piece 8.
  • the bolt 7 also has two parallel connecting flanges 19 and 20, at least one of which can have teeth 35 on the strins side. Between the connecting flanges 19 and 20, the connecting head 15 of the threaded bolt 14 of the bolt 7 fits and can be pivoted by means of the transverse bolt or connecting bolt 21.
  • the locking piece 39 is axially displaceable on this threaded bolt 14 belonging to the bolt 7 and can be supported by means of the nut 38 arranged on the side facing away from the connecting piece 8 and can be pressed into the engagement position of the toothings 35.
  • FIG. 7 While the locking position is shown in FIG. 6 with the teeth indented, it can be seen in FIG. 7 that the nut 38 is moved back axially to the central clamping sleeve 11 so that the teeth 36 and the tooth spaces 37 of the toothing 35 are disengaged . In this position shown in FIG. 7, a desired angular position between the bolt and the connecting flanges can thus be set in a simple manner. Thereafter, the nuts 38 are again adjusted towards the connecting pieces and tightened, whereby the teeth come into engagement.
  • the locking piece 39 has a U-shaped cross section
  • the U-transverse web 41 has a perforation 42 for the passage of the threaded bolt 14
  • the U- Legs 43 according to FIGS. 6 and 9 are concavely shaped on the end face, at least one U-leg 43, in the exemplary embodiment both U-legs being provided with the counter teeth.
  • the teeth are arranged parallel to the pivot axis between the bolt 7 and the connector 8.
  • Both connecting flanges 19 and 20 of the connecting piece like both U-legs 43 of the locking piece 39, each have matching toothings or, if appropriate, also other mutually insertable deformations.
  • the locking piece 39 Since the locking piece 39 is mounted on the threaded bolt 14 by means of its perforation 42, it can be rotated so that it can also be turned through 180 °, which in turn brings it into a coupling and locking position.
  • the U-legs 43 fit in both rotational positions with the two flanges 19 and 20 of the connecting piece 8 in terms of distance and in terms of their teeth.
  • the through-hole 42 in the U-crosspiece 41 of the locking piece 39 is offset by a quarter of the tooth pitch with respect to a longitudinal center plane 45 running through the center of a central tooth 44. It can be clearly seen in FIG. 10 that the center of the hole 46 is offset by a quarter tooth pitch in relation to the longitudinal center plane 45 running through the tip of a central tooth 44. If the locking piece 39 is now rotated by 180 °, the position with dashed lines on the teeth results in relation to the position with solid lines, so that this measure alone makes it possible to achieve setting angles whose gradation is halved compared to the tooth gradation.
  • the perforation 42 in the U-crosspiece 41 of the locking piece 39 has a game with respect to the bolt 14, in which the diameter of this hole 42 is at least half the width of the tooth pitch larger than the diameter of the Bolt 14 is.
  • the locking piece 39 can be laterally offset by this value, so that when the tooth tips of the teeth of the locking piece and the connecting piece meet, an engagement of these teeth is nevertheless possible by the lateral displacement mentioned.
  • a stepless angle adjustment can be achieved through the combination of the measures described above with a relatively small clearance between the bolt 14 and the perforation 42. If the overall play of the bolt 14 compared to the perforation 42 as a whole corresponded to the tooth pitch, this measure could also be used to continuously adjust different angles.
  • the teeth and tooth gaps are approximately isosceles triangles in cross section.
  • a locking and / or clamping element is arranged on the connecting piece 8, which acts as a joint lock on the two bars 7 which can be pivoted relative to the connecting piece 8 and which is adjustable transversely to the bars 7 and to the formlining 2 and which has a shape and / or engages non-positively on the end faces of the bolts 7 or the threaded bolts 14 belonging to them.
  • the nut 38 provided as the axial contact of the U-shaped locking piece 39 can be tightened in the locking position until the clearance of this play on the pivot pin 21 in the connecting piece 8. This results in a considerable stabilization of the entire bar chain against increasing pressures and forces even when concreting. In addition, an additional frictional connection is effected on this pivot pin 21.
  • Fig. 11 shows an embodiment in which at the two pivot points of each bolt 7 each with one end acting as articulated locks 60 engage with their other end on an adjacent connector 8 and there at a distance from the pivot point of the bolt 7 or attack its connecting bolts 21. This results in two locking spindles 60 for each bolt 7 between the connecting pieces 8 connected to it.
  • the fastening back 22 of the connecting piece 8, comprising the carrier 5 overlaps the side walls of the carrier 5 over more than the distance between the pivot point or bolt 21 of the Bolt 7 and the point of attack 61 of the tension spindle 60 and has this point of attack 61.
  • the fastening back 22 is designed to be correspondingly wide.
  • a bolt 7 forms a triangle in the area of the points of attack 21 and 61 together with a tension spindle 60 and the fastening back 22, the angular positions of which are adjustable and can also be fixed by means of the tightenable tension spindles.

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  • Architecture (AREA)
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Description

Die Erfindung betrifft eine Schalung für Rundbauten mit einer bezüglich ihrer Krümmung einstellbaren Schalhaut, die an sie abstützenden Trägern befestigt ist, und mit an den Trägern mit Abstand zur Schalhaut angreifenden, eine Riegelkette bildenden, in ihrer Länge einstellbaren Riegeln, wobei einander benachbarte Riegel der Riegelkette jeweils über ein an einem Träger angeordnetes Verbindungsstück verbunden sind und jeder Riegel über ein eigenes Gelenk an dem Verbindungsstück angreift, das seinerseits an dem Träger befestigt ist, wobei die Winkellage der Riegel zueinander durch die Längenänderung der Riegel veränderbar ist und wobei das Verbindungsstück einen Aufnahmebereich für in der Riegelkette benachbart zueinanderliegende Anschlußköpfe der Riegel aufweist.The invention relates to a formwork for circular structures with an adjustable formwork facing, which is fastened to the supports supporting it, and with bars which act on the girders at a distance from the formlining, form a locking chain, and have adjustable length bars, with adjacent locking bars of the locking chain are each connected via a connector arranged on a carrier and each bolt engages the connector via its own joint, which in turn is fastened to the carrier, the angular position of the bolts relative to one another being changeable by changing the length of the bolts and wherein the connector has a receiving area for in the bolt chain adjacent to each other connecting heads of the bolt.

Eine derartige Schalung ist aus der DE-B-24 26 708 bereits bekannt. In an sich vorteilhafter Weise ist dabei ein schnelles Aufbauen und Einstellen der Schalung möglich, bei welcher die einzelnen Schaltafeln schon von vorneherein mit Trägern und Riegeln versehen sein können. Für eine sichere Verankerung ist es jedoch erforderlich, daß einander jeweils gegenüberstehende Schaltafein durch Schalungszuganker gegeneinander verankert werden, so daß die so betonierte Wand nach ihrer Fertigstellung Lochungen oder Schalungszuganker enthält. Dies ist vor allem bei Rundbehältern unerwünscht, weil diese oft als Flüssigkeitsbehälter dienen sollen und einen entsprechend hohen Innendruck durch die gelagerte Flüssigkeit aushalten sollen. Demgemäß sind korrosionsgefährdete Bestandteile innerhalb einer solchen Behälterwand, wie es Schalungszuganker sind, oder nachträglich geschlossene Lochungen für solche Schalungszuganker in hohem Maße unerwünscht.Such formwork is already known from DE-B-24 26 708. Advantageously, it is possible to set up and set the formwork quickly, in which the individual formwork panels can be provided with supports and bolts from the outset. For secure anchoring, however, it is necessary that mutually opposing formwork ties are anchored to one another by formwork tie rods, so that the wall thus concreted contains perforations or formwork tie rods after its completion. This is particularly undesirable in the case of round containers because they are often intended to serve as liquid containers and are intended to withstand a correspondingly high internal pressure from the stored liquid. Accordingly, components at risk of corrosion within such a container wall, such as formwork tie rods, or subsequently closed perforations for such formwork tie rods are highly undesirable.

Aus der DE-U-77 04 885 ergibt sich eine Schalung anderer Gattung, bei welcher nämlich zunächst eine Riegelkette bezüglich der Winkellage der einzelnen Riegel eingestellt und mittels Keilen fixiert werden soll, wonach die Verbindung mit der eigentlichen Schalung erfolgt. Dabei ist nicht nur die Einstellung und Fixierung mittels Keilen schwieriger und eventuell auch unsicherer als eine Fixierung mit Schalungszugankern, sondern es ergibt sich auch ein erhöhter Montageaufwand beim Aufbau einer solchen Schalung.DE-U-77 04 885 results in formwork of a different type, in which a lock chain is initially to be set with respect to the angular position of the individual locks and fixed by means of wedges, after which the connection to the actual formwork takes place. Not only is the setting and fixing by means of wedges more difficult and possibly also less secure than fixing with formwork tie anchors, but there is also an increased assembly effort when constructing such formwork.

Es besteht deshalb die Aufgabe, eine Schalung der eingangs erwähnten Art zu schaffen, bei welcher Schalungszuganker zwischen den einander gegenüberstehenden Schaltafeln entbehrlich sind, die einzelnen Riegel in ihrer Länge praktisch kontinuierlich verstellbar und den jeweiligen Bedürfnissen leicht anpassbar sind, ohne daß es einen besonderen Verschlußstückes zur Bildung einer geschlossenen Riegelkette bedarf, und bei welcher die Winkelstellung der einzelnen Riegel zueinander einerseits nachstellbar, andererseits aber sicher auch gegenüber ungleichmäßigen und hohen Betonierdrücken festlegbar ist. Dabei sollen die zum Schalen benötigten Teile verhältnismäßig einfach im Aufbau und den rauhen Bedingungen am Bau gut gewachsen sein und man soll mit einer Vielzahl von gleichen, mehrfach verwendbaren Teilen auskommen können.It is therefore the task of creating a formwork of the type mentioned, in which formwork tie rods between the opposing formwork panels are dispensable, the length of the individual bars is practically continuously adjustable and easily adaptable to the respective needs without a special closure piece Formation of a closed bar chain is required, and in which the angular position of the individual bars to one another can be adjusted on the one hand, but on the other hand can also be securely fixed with respect to uneven and high concrete pressures. The parts required for formwork should be relatively easy to set up and withstand the harsh conditions on site and one should be able to make do with a large number of the same, reusable parts.

Die erfindungsgemäße Lösung dieser Aufgabe besteht darin, daß eine an dem Riegel oder dem Verbindungsstück befindliche, zum Festlegen der Winkellage des Riegels gegenüber dem Verbindungsstück formschlüssig kuppelbare Gelenksperre vorgesehen ist.The solution to this problem according to the invention is that an articulated lock which is located on the bolt or the connecting piece and which can be positively coupled relative to the connecting piece to fix the angular position of the bolt is provided.

Bei einer derart aufgebauten Schalung werden also an den einzelnen Trägern der Schaltafeln angeordnete Verbindungsstücke mit in die Bildung der gesamten Riegelkette einbezogen. Die zwischen je einem Ende eines Verbindungsstückes und einem daran angreifenden Riegel wirksame Gelenksperre ermöglicht sowohl ein stufenloses Anpassen der Winkellage von Riegel und Verbindungsstück gegeneinander als auch ein sicheres formschlüssiges Festlegen dieser Teile zueinander, so daß ein sehr genaues Einstellen von Winkellagen möglich ist und derart hohe Kräfte übertragen werden können, daß Schalungszuganker zwischen den einander gegenüberstehenden Schaltafeln nicht erforderlich sind. Man erhält eine genügend stabile Abstützung der Schalung und kann deren Haltbarkeit auch vergleichsweise gut und sicher nachprüfen : Wenn alle Gelenksperren vorhanden und festgelegt sind, herrscht Formschluß in der gesamten Riegelkette in Verbindung mit den zugehörigen Verbindungsstücken und den daran angeschlossenen Trägern.With a formwork constructed in this way, connecting pieces arranged on the individual supports of the formwork panels are included in the formation of the entire locking chain. The joint lock, which is effective between one end of a connecting piece and a bolt that engages it, enables both the stepless adjustment of the angular position of the bolt and the connecting piece to one another and a secure, form-fitting fixing of these parts to one another, so that a very precise adjustment of angular positions is possible and such high forces can be transferred that formwork tie rods between the opposing formwork panels are not required. A sufficiently stable support of the formwork is obtained and its durability can also be checked comparatively well and safely: When all joint locks are in place and fixed, there is a positive connection in the entire locking chain in connection with the associated connecting pieces and the beams connected to them.

Zweckmäßigerweise weisen die Verbindungsstücke einen Befestigungsrücken auf, der vorzugsweise auf das Profil von bekannten bzw. vorhandenen Längsträgern abgestimmt ist. Dementsprechend können derartige, bei entsprechenden Baufirmen in der Regel vorhandene Längsträger ohne weiteres zum Erstellen der Schalung mitverwendet werden.The connecting pieces expediently have a fastening back which is preferably matched to the profile of known or existing side members. Correspondingly, such longitudinal beams, which are generally present in the case of corresponding construction companies, can easily be used to create the formwork.

Eine vorteilhafte Weiterbildung besteht darin, daß die zur Schalung gehörigen Gelenksperren jeweils einen Justier- und Befestigungsbügel aufweisen, der vorzugsweise als im wesentlichen U-förmig profiliertes, das riegelnahe Ende eines Anschlußflansches eines Verbindungsstückes übergreifendes U-Stück od. dgl. ausgebildet ist, welches in seinem U-Steg einen Steckzapfen hat, wobei im zugehörigen Anschlußflansch des Verbindungsstückes ein Einsteckloch zur Aufnahme dieses Steckzapfens vorgesehen ist derart, daß die im Verbindungsstück gelagerte Gelenksperre sich passend zur gewünschten Winkellage des Riegels gegenüber dem Verbindungsstück einstellen kann, und daß die Gelenksperre an dem zugehörigen Riegel angreifende Verstell- und Befestigungsmittel aufweist. Durch diese Ausbildung erreicht-man u. a., daß sich die Gelenksperre selbsttätig in die jeweilige der Befestigungsstellung entsprechende Winkellage einstellen kann. Besondere, beispielsweise in Kugelkalotten gelagerte Schrauben od. dgl. Befestigungsmittel, die eine Anpassung an entsprechende unterschiedliche Winkellagen ermoglichen, können vermieden werden, was für die rauhen Betriebsverhältnisse an der Baustelle wichtig ist.An advantageous further development is that the articulated locks belonging to the formwork each have an adjusting and fastening bracket, which is preferably designed as an essentially U-shaped profiled U-piece or the like, which engages over the bolt-near end of a connecting flange of a connecting piece his U-web has a plug pin, an insertion hole is provided for receiving this plug pin in the associated connecting flange of the connecting piece such that the articulated lock mounted in the connecting piece can adjust itself to the desired angular position of the bolt relative to the connecting piece, and that the articulated lock on the associated one Has locking attacking adjustment and fastening means. With this design, one achieves, among other things, that the joint lock can automatically adjust itself to the respective angular position corresponding to the fastening position. Special fasteners or the like, for example, mounted in spherical caps, which enable adaptation to corresponding different angular positions, can be avoided, which is important for the rough operating conditions at the construction site.

Die für die Bildung der Riegelkette vorgesehenen, längenverstellbaren Einzelriegel und das zwischen zwei benachbarte Riegel vorgesehene Verbindungsstück, welches an die Längsträger der Schalhaut angreift, können in vorteilhafter Weise auch noch zum Bilden eines Zuggurtes für die Halterung einer äußeren Schalhaut verwendet werden. Dabei brauchen die dort vorgesehenen Verbindungsstücke zwar nicht die Einstecklöcher für den Steckzapfen od. dgl. der Gelenksperre aufzuweisen, im Prinzip kann man aber die gleichen Verbindungsstücke, wie sie für die Bildung der zu einer inneren Schalhaut gehörigen Riegelkette vorgesehen sind, auch bei diesem Zuggurt verwenden, insbesondere auch entsprechende, in ihrer Länge verstellbare Einzelriegel. Diese besondere Verwendungsmöglichkeit hat u. a. den Vorteil einer sparsamen Lagerhaltung.The length-adjustable individual bolts provided for the formation of the bolt chain and the connecting piece which is provided between two adjacent bolts and which engages the longitudinal beams of the formlining can advantageously also be used to form a tension belt for holding an outer formlining. The connectors provided there do not need to have the insertion holes for the plug pin or the like of the joint lock, but in principle the same connectors as are provided for the formation of the locking chain belonging to an inner formlining can also be used with this tension belt , in particular also corresponding, adjustable in length bar. This particular use has u. a. the advantage of economical storage.

Ausgestaltungen der Erfindung von vorteilhafter Bedeutung, die eine bessere Übertragung hoher Kräfte innerhalb der festgelegten Riegelkette erlaubt, wobei Spiel, Verkantungen, Verformungen od. dgl. und insbesondere ungewollte Verschwenkungen an den Schwenkpunkten zwischen den Riegeln und den Verbindungsstücken praktisch ausschließen, so daß Überbelastungen der die Schwenkpunkte bildenden Bolzen und der Gelenksperren vermieden werden, ohne daß parallel zu den Riegelketten verlaufende zusätzliche Gurte oder Spannschrauben od. dgl. notwendig sind, können vor allem darin bestehen, daß das Verbindungsstück selbst ein Teil der Gelenksperre ist bzw. wenigstens einen Teil der Gelenksperre enthält. Dadurch können auftretende Kräfte besser von der Gelenksperre aufgenommen und in die Riegelkette bzw. an die Träger weitergegeben werden. Somit ergibt sich eine Riegelkette, deren eingestellte Winkelposition auch bei großen Kräften mit großer Sicherheit erhalten bleibt, so daß eine solche Riegelkette gleichzeitig zur Einstellung einer festen Krümmung, die auch unter dem Betonierdruck erhalten bleibt, als auch als Gurtung dienen kann.Embodiments of the invention of advantageous importance, which allows a better transmission of high forces within the fixed locking chain, play, canting, deformation or the like. And in particular unwanted pivoting at the pivot points between the bolts and the connectors practically exclude, so that overloading the Bolts forming pivot points and the articulated locks can be avoided without the need for additional straps or tensioning screws or the like running parallel to the locking chains. Above all, the connecting piece itself is part of the articulated lock or contains at least part of the articulated lock . In this way, occurring forces can be better absorbed by the joint lock and passed on to the locking chain or to the carrier. This results in a locking chain, the set angular position of which is retained with great certainty even with large forces, so that such a locking chain can simultaneously serve to set a fixed curvature, which is also retained under the concrete pressure, and as a belt.

Eine vorteilhafte Ausführungsform kann dabei bei einer solchen Schalung mit einer aus Riegeln und an den Trägern angreifenden Verbindungsstücken gebildeten Riegelkette darin bestehen, daß zum Festlegen der Riegel in ihrer Winkellage gegenüber dem Verbindungsstück eine Verzahnung od. dgl. in verschiedenen Winkelstellungen zusammenfügbare Kupplung vorgesehen ist, wobei Zähne od. dgl. Vorsprünge an dem Verbindungsstück und dazu passende Zahnlücken od. dgl. Ausnehmungen an den Riegeln vorgesehen sein können. Das Ein- und Ausrücken der Zähne erlaub nicht nur ein Verstellen und Festlegen von Winkellagen in kleinen Schritten, sondern überträgt auch in vorteilhafter Weise die auftretenden Druckkräfte unmittelbar in Richtung der einzelnen Elemente der Riegelkette.An advantageous embodiment can be in such formwork with a locking chain formed from bolts and engaging connectors on the girders, that a toothing or the like is provided in different angular positions for fixing the bolts in their angular position relative to the connecting piece, whereby Teeth or the like. Protrusions on the connecting piece and matching tooth gaps or the like. Recesses on the bolts can be provided. The engagement and disengagement of the teeth not only allows the angular positions to be adjusted and set in small steps, but also advantageously transmits the pressure forces directly in the direction of the individual elements of the locking chain.

An den Stirnseiten des Verbindungsstückes kann dabei auf einem Kreis um die Schwenkverbindung zwischen Riegel und Verbindungsstück stirnseitig die eine Zahnung od. dgl. vorgesehen sein und der Riegel kann auf einem zu ihm gehörenden Gewindebolzen ein mittels einer Mutter axial verstellbares Sperrstück als Gelenksperre mit einer konkaven Rundung und darin angeordneten Zähnen od. dgl. haben, die mit den Zähnen od. dgl. des Verbindungsstückes zusammenpassen. Zum Lösen dieses Sperrstückes kann die dieses Sperrstück axial stützende und haltende Mutter einige Gewindegänge von der Zahnung weg gedreht werden, so daß dann die Zahnung ausgerückt werden kann. Nunmehr kann eine geringfügige Verschwenkung und danach die umgekehrte Verstellung der Mutter durchgeführt werden, wodurch eine andere Winkellage eingestellt und festgelegt ist. Die auftretenden Kräfte werden dabei über dieses Sperrstück unmittelbar auf den Riegel bzw. das Verbindungsstück übertragen.On the end faces of the connecting piece, a toothing or the like can be provided on a circle around the swivel connection between the bolt and the connecting piece on the face side, and the bolt can have a locking piece axially adjustable by means of a nut as a joint lock with a concave curve on a threaded bolt belonging to it and have teeth or the like disposed therein which match the teeth or the like of the connector. To release this locking piece, the nut axially supporting and holding this locking piece can be turned a few threads away from the toothing, so that the toothing can then be disengaged. Now a slight pivoting and then the reverse adjustment of the nut can be carried out, whereby a different angular position is set and fixed. The forces occurring are transmitted directly to the bolt or the connector via this locking piece.

Das Verbindungsstück kann - wie bei einem früher erwähnten Ausführungsbeispiel - zwei parallele Anschlußflansche haben, von denen wenigstens einer stirnseitig eine Verzahnung aufweist und zwischen die der Anschlußkopf des Gewindebolzens des Riegels paßt und mittels eines Querbolzens verschwenkbar ist und auf dem zu dem Riegel gehörenden Gewindebolzen kann das Sperrstück axial verschiebbar und mittels der auf der dem Verbindungsstück abgewandten Seite angeordneten Mutter abstützbar und in Eingriffstellung der Verzahnung od. dgl. andrückbar sein. Durch entsprechend festes Anziehen dieser Mutter wird dabei in vorteilhafter Weise gleichzeitig das in dem den Verschwenkpunkt bildenden Querbolzen vorhandene Spiel beseitigt, so daß jegliche Beweglichkeit innerhalb der Riegelkette von vornherein ausgeschaltet ist.The connector can - as in a previously mentioned embodiment - have two parallel connecting flanges, at least one of which has a toothing on the end face and between which the connecting head of the threaded bolt of the bolt fits and can be pivoted by means of a transverse bolt and on the threaded bolt belonging to the bolt, this can be done Locking piece can be axially displaceable and can be supported by means of the nut arranged on the side facing away from the connecting piece and can be pressed on in the engagement position of the toothing or the like. By appropriately tightening this nut, the play present in the transverse pin forming the pivot point is advantageously eliminated at the same time, so that any mobility within the locking chain is eliminated from the outset.

Das Sperrstück kann einen U-förmigen Querschnitt haben, dessen U-Quersteg eine Lochung für den Durchtritt des Gewindebolzens aufweist und dessen U-Schenkel stirnseitig konkav geformt sind, wobei wenigstens ein U-Schenkel mit Gegenzähnen versehen ist. Dabei können die Zähne parallel zur Schwenkachse zwischen Riegel und Verbindungsstück angeordnet sein. Besonders günstig ist es, wenn beide Anschlußflansche des Verbindungsstückes und beide U-Schenkel des Sperrstückes jeweils zusammenpassende Zahnungen od. dgl. ineinanderfügbare Verformungen haben, weil dann entsprechend größere Kräfte übertragen werden können.The locking piece can have a U-shaped cross-section, the U-cross bar has a perforation for the passage of the threaded bolt and the U-legs are concavely shaped on the end face, at least one U-leg being provided with counter teeth. The teeth can be arranged parallel to the pivot axis between the bolt and the connector. It is particularly favorable if both connecting flanges of the connecting piece and both U-legs of the locking piece each have matching toothing or the like. Deformable deformations, because correspondingly greater forces can then be transmitted.

Darüber hinaus wird dadurch eine Ausgestaltung der Erfindung und der vorerwähnten Ausführungsform von erheblicher Bedeutung und beachtlichen Vorteilen ermöglicht, wobei das Sperrstück auf dem zu dem Riegel gehörenden Bolzen um 180° drehbar ist und die U-Schenkel in beiden Drehstellungen wechselweise mit den beiden Flanschen des Verbindungsstückes in ihrem Abstand und bezüglich ihrer Verzahnung zusammenpassen. Dabei können die Durchtrittslochungen in dem U-Quersteg des Sperrstückes gegenüber einer durch die Mitte eines mittleren Zahnes und/oder die Mitte einer in der Mitte der U-Schenkel befindlichen Zahnlücke verlaufenden Längsmittelebene um ein Viertel der Breite der Basis eines Zahnes bzw. der Zahnteilung versetzt sein. Auf diese Weise können mit relativ groben Zahnungen, die für eine gute Kraftübertragung zweckmäßig sind, dennoch relativ kleine Schritte bei der Verstellung der Winkellage der Riegel durchgeführt werden. Es kann nämlich jeweils durch Drehung des Sperrstückes um 180° aufgrund der vorerwähnten Versetzung des Durchtrittsloches jeweils ein Schritt entsprechend einem halben Zahn verstellt werden.In addition, this enables an embodiment of the invention and the aforementioned embodiment of considerable importance and considerable advantages, the locking piece on the bolt belonging to the bolt being rotatable through 180 ° and the U-legs alternately with the two flanges of the connecting piece in both rotational positions fit together in terms of their spacing and toothing. The through holes can be gene in the U-transverse web of the locking piece with respect to a longitudinal center plane running through the center of a central tooth and / or the center of a tooth gap located in the center of the U-legs by a quarter of the width of the base of a tooth or the tooth pitch. In this way, relatively coarse toothings, which are expedient for good power transmission, can nevertheless be used to carry out relatively small steps in adjusting the angular position of the bolts. Namely, a step corresponding to half a tooth can be adjusted by rotating the locking piece by 180 ° due to the aforementioned displacement of the passage hole.

Eine andere oder zusätzliche Maßnahme zur Verkleinerung der Verstellschritte bei vorgegebener Zahnung bzw. gar zur stufenlosen Verstellung kann darin bestehen, daß die Lochung in dem U-Quersteg des Sperrstückes gegenüber dem Bolzen ein Spiel hat, bei welchem der Durchmesser dieses Loches wenigstens um die Hälfte der Breite einer Zahnbasis bzw. der Zahnteilung größer als der Durchmesser des Bolzens ist. Somit wird nicht nur die Verdrehung des Sperrstückes, sondern auch ein gewisser seitlicher Versatz ermöglicht, der die den Zahnungen entsprechenden Stufen bei der Seitenverstellung überbrücken kann.Another or additional measure for reducing the adjustment steps for a given toothing or even for stepless adjustment can be that the perforation in the U-transverse web of the locking piece has a play relative to the bolt, in which the diameter of this hole is at least half that Width of a tooth base or the tooth pitch is larger than the diameter of the bolt. This enables not only the rotation of the locking piece, but also a certain lateral offset, which can bridge the steps corresponding to the serrations during the lateral adjustment.

Eine andere Möglichkeit der stufenlosen Verstellung bei symmetrisch angeordneten Zähnen kann darin bestehen, daß das Gesamtspiel des Bolzens gegenüber der Lochung an dem U-Quersteg des Sperrstückes insgesamt der Zahnteilung entspricht. Somit kann eine Kombination aus Querverstellung des Sperrstückes gegenüber dem Bolzen und Einstellen der entsprechenden Zähne zueinander stufenlos durchgeführt werden.Another possibility of the infinitely variable adjustment with symmetrically arranged teeth can consist in the fact that the total play of the bolt in relation to the perforation on the U-crosspiece of the locking piece corresponds overall to the tooth pitch. A combination of transverse adjustment of the locking piece relative to the bolt and adjustment of the corresponding teeth to one another can thus be carried out continuously.

Die Zähne und die Zahnlücken können im Querschnitt etwa gleichschenklige Dreiecke oder Trapeze sein, um beim Zusammenfügen und Verriegeln gut ineinander zu greifen.The teeth and the tooth gaps can be approximately isosceles triangles or trapezoids in cross-section in order to interlock well when joining and locking.

Eine abgewandelte Ausführungsform der Erfindung von wiederum ganz erheblicher Bedeutung kann darin bestehen, daß an dem Verbindungsstück ein als Gelenksperre an den beiden gegenüber dem Verbindungsstück schwenkbaren Riegeln angreifendes, quer zu den Riegeln und etwa senkrecht zu der Schalhaut verstellbares Sperr-und/oder Klemmelement angeordnet ist, welches form- und/oder kraftschlüssig an den Stirnseiten der Riegel bzw. der Anschlußflansche angreift. Bei gelockertem Sperr- und/oder Klemmelement können also die beiden an einem Verbindungsstück angreifenden Riegel eingestellt und dann durch die Verstellbewegung des Sperr- oder Klemmelementes in dieser Position fixiert werden.A modified embodiment of the invention, again of considerable importance, can consist in that a locking and / or clamping element is arranged on the connecting piece, acting as a joint lock on the two bars pivotable relative to the connecting piece, transversely to the bars and approximately perpendicular to the formlining , which engages positively and / or non-positively on the end faces of the bolts or the connecting flanges. When the locking and / or clamping element is loosened, the two latches engaging on a connecting piece can thus be set and then fixed in this position by the adjustment movement of the locking or clamping element.

Sowohl bei der vorerwähnten Ausführungsform als auch bei den eingangs schon geschilderten Ausführungsformen können zum Festlegen der Sperrstücke oder Sperrelemente mit Schrägflächen bzw. Gewinden versehene Befestigungselemente vorgesehen sein, die gleichzeitig das in den Schwenkbolzen vorgesehene Spiel beseitigen. Beispielsweise kann die als axiale Anlage des U-förmigen Sperrstückes vorgesehene Mutter in Sperrstellung bis zur Beseitigung des Spieles innerhalb des Schwenkbolzens in dem Verbindungsstück angezogen sein.Both in the aforementioned embodiment and in the embodiments already described, fastening elements provided with inclined surfaces or threads can be provided for fixing the locking pieces or locking elements, which at the same time eliminate the play provided in the pivot bolts. For example, the nut provided as an axial contact of the U-shaped locking piece can be tightened in the locking position in the locking position until the clearance is eliminated within the pivot pin in the connecting piece.

Wieder eine andere Ausführungsform kann darin bestehen, daß an den beiden Schwenkpunkten eines jeden Riegels jeweils mit einem Ende als Gelenksperre dienende Zugspindeln angreifen, die mit ihrem anderen Ende an einem benachbarten Verbindungsstück und dort mit Abstand zu dem Schwenkpunkt des Riegels angreifen. Je nach Winkelstellung werden diese Zugspindeln mehr oder weniger verkürzt, indem die auf zwei Bolzen befindlichen Gewindehülsen mehr oder weniger angezogen werden. Dabei ist es zweckmäßig, wenn der die Träger umfassende Befestigungsrücken des Verbindungsstückes die Seitenwände des Trägers über mehr als den Abstand zwischen dem Schwenkpunkt des Riegels und dem Angriffspunkt der Zugspindel übergreift und vorzugsweise diesen Angriffspunkt aufweist. Es bildet sich somit zwischen jedem Riegel, einer als Gelenksperre dienenden Zugspindel und dem zugehörigen Teil des Befestigungsrückens des Verbindungsstückes ein Dreieck, welches entsprechend gut Zug- und/oder Druckkräfte aufnehmen kann. Die Winkel dieses Dreieckes werden durch die Verstellung insbesondere der Zugspindel vorgewählt.Yet another embodiment can consist in that at the two pivot points of each bolt each act as an articulated lock acting on the traction screws, which engage with their other end on an adjacent connecting piece and there at a distance from the pivot point of the bolt. Depending on the angular position, these traction spindles are shortened more or less by tightening the threaded sleeves on two bolts more or less. It is expedient if the fastening back of the connecting piece comprising the carrier engages over the side walls of the carrier over more than the distance between the pivot point of the bolt and the point of application of the tension spindle and preferably has this point of application. A triangle is thus formed between each bolt, a traction spindle serving as an articulated lock and the associated part of the fastening back of the connecting piece, which can absorb tensile and / or compressive forces accordingly. The angles of this triangle are preselected by adjusting the tension spindle in particular.

Es sei erwähnt, daß bei allen vorerwähnten Ausführungsformen, bei denen ein in den Schwenkpunkten während der Einstellbewegung vorhandenes Spiel durch das Festlegen der Winkellagen gleichzeitig beseitigt wird, in diesen Schwenkpunkten zusätzlich eine Klemmung auftritt, die die jeweils eingestellte Winkellage zusätzlich stabilisiert und festlegt.It should be mentioned that in all of the above-mentioned embodiments, in which a game present in the pivot points during the adjustment movement is simultaneously eliminated by the fixing of the angular positions, a clamping also occurs in these pivot points, which additionally stabilizes and fixes the respectively set angular position.

Nachstehend ist die Erfindung anhand von Ausführungsbeispielen mit den erfindungswesentlichen Einzelheiten noch näher erläutert. Es zeigen in unterschiedlichen Maßstäben :

  • Fig. 1 eine Teil-Aufsicht einer Schalung für Rundbauten,
  • Fig. 2 eine Seitenansicht einer Gelenksperre,
  • Fig. 3 eine Teil-Aufsicht auf ein Verbindungsstück, die Gelenksperre und die Anschlußenden der zugehörigen Riegel in vergrößertem Maßstab,
  • Fig. 4 eine Seitenansicht der Anordnung nach Fig. 3 aus der Blickrichtung B in Fig. 3 gesehen,
  • Fig. 5 in schematisierter Darstellung eine TeilDraufsicht einer Schalung für eine gekrümmte Wand bzw. einen Rundbau, bei welcher die Verbindungsstücke zwischen den Schalungsträgern und den Riegeln jeweils selbst ein Teil der zum Einstellen unterschiedlicher Winkel dienenden Gelenksperren sind,
  • Fig. 6 in vergrößertem Maßstab die Kupplung zwischen Verbindungsstück und Riegel bei einer Schalung gemäß Fig. 5, wobei zum Festlegen der Riegel in ihrer Winkellage gegenüber dem Verbindungsstück eine Verzahnung gegenüber einem Sperrstück an dem Riegel vorgesehen ist,
  • Fig. 7 eine Seitenansicht der Riegelkonstruktion gemäß Fig. 6,
  • Fig. 8 eine stirnseitige Ansicht des mit einer Zahnung versehenen Sperrstückes gemäß den Figuren 6 und 7,
  • Fig. 9 eine Seitenansicht des Sperrstückes vor dem Eingriff in die Zahnung an dem Verbindungsstück,
  • Fig. 10 in vergrößertem Maßstab die Anordnung einerseits der Zahnung des Sperrstückes und andererseits des Verbindungsstückes sowie das Spiel zwischen der Lochung des Sperrstückes und dem diese durchsetzenden, zu dem Riegel gehörenden Bolzenteil, sowie
  • Fig. 11 die Draufsicht einer Ausführungsform, bei welcher jeweils sich kreuzende Zugspindeln einerseits an den Schwenkpunkten der Riegel gegenüber den Verbindungsstücken und andererseits mit Abstand dazu an den Verbindungsstücken angreifen,
The invention is explained in more detail below using exemplary embodiments with the details essential to the invention. They show on different scales:
  • 1 is a partial top view of a formwork for circular buildings,
  • 2 is a side view of a joint lock,
  • 3 is a partial plan view of a connector, the hinge lock and the connecting ends of the associated latch on an enlarged scale,
  • 4 is a side view of the arrangement according to FIG. 3 seen from the viewing direction B in FIG. 3,
  • 5 is a schematic representation of a partial plan view of a formwork for a curved wall or a rotunda, in which the connecting pieces between the formwork girders and the transoms are each themselves part of the articulated locks used to set different angles,
  • 6 on an enlarged scale the coupling between the connecting piece and the bolt in a formwork according to FIG. 5, with a toothing with respect to a locking piece on the bolt being provided for fixing the bolt in its angular position relative to the connecting piece,
  • 7 is a side view of the bolt construction according to FIG. 6,
  • 8 is an end view of the locking piece provided with teeth according to FIGS. 6 and 7,
  • 9 is a side view of the locking piece before engagement in the toothing on the connecting piece,
  • Fig. 10 on an enlarged scale, the arrangement of the teeth of the locking piece on the one hand and on the other hand of the connecting piece and the game between the perforation of the locking piece and the penetrating bolt part belonging to the bolt, and
  • 11 is a top view of an embodiment in which each of the intersecting traction spindles on the one hand act on the pivot points of the bolts relative to the connecting pieces and on the other hand at a distance from the connecting pieces,

Bei den folgenden unterschiedlichen Ausführungsformen sind übereinstimmende Teile auch bei etwas abgewandelter Ausbildung mit übereinstimmenden Bezugszeichen benannt und falls bei dem einen oder anderen Ausführungsbeispiel das eine oder andere Teil nicht gesondert erwähnt ist, gilt für dieses Teil, was anhand eines anderen Ausführungsbeispieles dazu ausgesagt ist.In the following different embodiments, matching parts are named with matching reference numerals even in the case of a somewhat modified design, and if one or the other embodiment does not mention one or the other part, what applies to this part applies to this embodiment.

Eine im ganzen mit 1 bezeichnete Schalung für gekrümmte Flächen, Wände, Decken, Rundbauten od. dgl. aus Beton weist eine biegsame innere Schaihaut 2 sowie eine ebenfalls biegsame äußere Schalhaut 3 auf. Zwischen diesen beiden Schalhäuten 2 und 3 ist der später einzubringende Betonmörtel in einem kurzen Abschnitt eingezeichnet und mit 4 benannt. Wie in Fig. 1 oder 5 erkennbar, liegt die innere Schalhaut 2 auf im Abstand voneinander angeordneten inneren Längsträgern 5 auf. Diese wiederum stützen sich gegen eine im ganzen mit 6 bezeichnete Riegelkette ab. Diese weist eine Vielzahl von in ihrer Länge 1 veränderbaren, im übrigen starren, länglichen Riegeln 7 auf. Entsprechend der Krümmung der inneren Schalhaut 2 sind die länglichen, bezüglich ihrer Längsachse im wesentlichen geredlinigen Einzelriegel 7, hier auch kurz « Riegel 7 genannt, zueinander bzw. gegenüber einem noch zu beschreibenden Verbindungsstück 8 winklig angeordnet.A formwork designated as 1 for curved surfaces, walls, ceilings, round buildings or the like made of concrete has a flexible inner shuttering skin 2 and a likewise flexible outer shuttering skin 3. Between these two formwork skins 2 and 3, the concrete mortar to be installed later is drawn in in a short section and named 4. As can be seen in FIG. 1 or 5, the inner formlining 2 rests on inner longitudinal beams 5 arranged at a distance from one another. These in turn are supported against a bar chain designated as a whole by 6. This has a multiplicity of elongate bars 7 which are variable in their length 1 and which are otherwise rigid and elongated. Corresponding to the curvature of the inner formlining 2, the elongated individual bars 7, which are essentially straight with respect to their longitudinal axis, here also called bars 7, are arranged at an angle to one another or to a connecting piece 8 to be described.

Gemäß der Erfindung sind nun benachbarte Riegel 7 der Riegelkette 6 jeweils über ein an einem Längsträger 5 angeordnetes Verbindungsstück 8 verbunden und jeder Riegel 7 ist in seiner Winkellage gegenüber diesem Verbindungsstück 8 mittels einer im ganzen mit 9 bezeichneten Gelenksperre festlegbar. Wie besonders gut z. B. in Fig. 1, 3, 4, 6, oder 11 erkennbar, hat jeder Riegel 7 eine mit Innengewinden 10 versehene Spannhülse 11. An deren beiden Enden 12 und 13 hat jeder Riegel 7 einen dazu passenden Gewindebolzen 14.According to the invention, adjacent bars 7 of the bar chain 6 are each connected via a connecting piece 8 arranged on a longitudinal member 5, and each bar 7 can be fixed in its angular position with respect to this connecting piece 8 by means of a joint lock designated as 9. How particularly well z. 1, 3, 4, 6, or 11, each bolt 7 has a clamping sleeve 11 provided with internal threads 10. At both ends 12 and 13, each bolt 7 has a matching threaded bolt 14.

An diesen ist ein in Fig. 3 und 4 gut erkennbarer Anschlußkopf 15 vorgesehen, der die Form eines regelmäßigen Prismas mit rechteckigen Seitenflächen 16 und rechteckiger Stirnfläche 17 hat. In jedem Anschlußkopf 15 befindet sich eine Lochung 18, welche auch Anschlußflansche 19 und 20 des Verbindungsstückes 8 durchsetzen (Fig. 4). Die Anschlußköpfe 15 und damit die Riegel 7 sind mit Hilfe von Anschlußbolzen 21 mit den Anschlußflanschen 19 bzw. 20 des Verbindungsstückes 8 verbunden. Dieses weist einen Befestigungsrücken 22 auf, der auf das Profil 23 von bekannten bzw. vorhandenen Längsträgern 5 abgestimmt ist.A connection head 15, which is clearly recognizable in FIGS. 3 and 4, is provided on these and has the shape of a regular prism with rectangular side surfaces 16 and rectangular end surface 17. In each connection head 15 there is a perforation 18, which also pass through connecting flanges 19 and 20 of the connecting piece 8 (FIG. 4). The connection heads 15 and thus the bolts 7 are connected to the connection flanges 19 and 20 of the connecting piece 8 by means of connection bolts 21. This has a fastening back 22 which is matched to the profile 23 of known or existing side members 5.

Die bereits erwähnten Anschlußflansche 19 und 20 des Verbindungsstückes 8 bilden einen im ganzen mit 25 bezeichneten Aufnahmebereich für in der Riegelkette 6 benachbart zueinander liegende Anschlußköpfe 15. Wie gut aus Fig. 3 und 4 erkennbar, ist die Umrißform dieses Aufnahmebereiches 25 im Mittelbereich im wesentlichen U-förmig. Im übrigen passen die Anschlußköpfe 15- zu der lichten Weite zwischen dem parallel zueinander angeordneten Anschlußflanschen 19 und 20.The already mentioned connecting flanges 19 and 20 of the connecting piece 8 form a receiving area, generally designated 25, for connecting heads 15 lying adjacent to one another in the locking chain 6. As can be seen from FIGS. 3 and 4, the outline shape of this receiving area 25 is essentially U in the central area -shaped. Otherwise, the connection heads 15 match the clear width between the connection flanges 19 and 20 arranged parallel to one another.

In Fig. 3 erkennt man die Aufsicht und in Fig. 4 die Stirnansicht der in Fig. 2 in Seitenansicht vergrößert herausgezeichneten Gelenksperre 9. Sie ist als im wesentlichen im Seitenprofil U-förmiger Justier- und Befestigungsbügel ausgebildet. An seinem U-Steg 27 ist ein Steckzapfen 28 und im zugehörigen Anschlußflansch 20 ein Einsteckloch 29 dafür vorgesehen. Der obere Anschlußflansch 20 ist dazu ein Stück über den unteren Anschlußflansch 19 hinaus in Richtung der beiden Riegel verlängert, wie gut aus Fig. 4 und 3 erkennbar. An den U-Schenkeln 30 der Gelenksperre 9 sind zwei Stell- und Befestigungsschrauben 31 und 32 vorgesehen. Die U-Schenkel 30 ragen in der Gebrauchsstellung der Gelenksperre 9 in den Bereich der Seitenflächen 16 des Anschlußkopfes 15 (Fig. 4). Durch entsprechendes Einstellen dieser Stell- und Befestigungsschrauben 31 und 32 kann man den jeweiligen Anschlußkopf 15 in eine gewünschte Winkellage gegenüber dem Verbindungsstück 8 einjustieren und festlegen. Dieser Winkel ist in Fig. 3, linke Seite gut erkennbar und mit A bezeichnet. Da der Außendurchmesser D der Innenschalhaut 2 (Fig. 1) groß im Verhältnis zur Länge 1 der einzelnen Riegel ist, ist auch der Winkelbetrag A verhältnismäßig klein, so daß die für die Gelenksperre 9 und ihre Stell- und Befestigungsschrauben 31, 32 benötigten Platzverhältnisse ohne Schwierigkeit bei der Schalung zur Verfügung stehen ; auch sind die entsprechenden Kraftverhältnisse beim Verbindungsstück 8 bzw. der Gelenksperre 9 beherrschbar. Wegen des in das Einsteckloch 29 eingeführten Steckzapfens 28 liegt die Gelenksperre 9 gegenüber Seitenverschiebungen fest, kann sich jedoch ohne zusätzliche Maßnahmen praktisch selbsttätig in die zu der jeweiligen Lage des Riegels 7 passende Lage verschwenken, wie es gut aus Fig. 3 erkennbar ist. Vorteilhaft ist bei dieser Ausführung auch, daß bei einer im wesentlichen fertiggestellen Schalung noch ohne Schwierigkeiten Nachjustierungen bezüglich der Winkellage einzelner Riegel 7 vorgenommen werden können. Auch kann durch Verdrehen der Spannhülsen 11 der einzelnen Riegel 7 deren Länge 1 verändert werden. Dabei ist im Ausführungsbeispiel die Länge 1 (Fig. 1) zwischen den jeweiligen Mitten der Anschlußbolzen 21 gemessen.3 shows the top view and in FIG. 4 the front view of the articulated lock 9 shown enlarged in side view in FIG. 2. It is designed as an essentially U-shaped adjustment and fastening bracket in the side profile. On its U-web 27 there is a plug 28 and in the associated connecting flange 20 there is an insertion hole 29 therefor. For this purpose, the upper connecting flange 20 is extended a little beyond the lower connecting flange 19 in the direction of the two bolts, as can be seen from FIGS. 4 and 3. Two adjusting and fastening screws 31 and 32 are provided on the U-legs 30 of the joint lock 9. The U-legs 30 protrude in the use position of the joint lock 9 in the region of the side surfaces 16 of the connection head 15 (Fig. 4). By setting these adjusting and fastening screws 31 and 32 accordingly, the respective connection head 15 can be adjusted and set in a desired angular position relative to the connecting piece 8. This angle is clearly visible in FIG. 3, left side and is designated A. Since the outer diameter D of the inner formlining 2 (Fig. 1) is large in relation to the length 1 of the individual bolts, the angle amount A is also relatively small, so that the space required for the joint lock 9 and its adjusting and fastening screws 31, 32 without Difficulty in formwork are available; the corresponding force relationships in the connector 8 or the joint lock 9 can be controlled. Because of the plug 28 inserted into the insertion hole 29, the joint lock 9 is fixed with respect to lateral displacements, but can practically automatically pivot into the position suitable for the respective position of the bolt 7 without additional measures, as can be clearly seen in FIG. 3. It is also advantageous in this embodiment that readjustments with respect to the angular position of individual bolts 7 can still be carried out without difficulty in the case of essentially finished formwork. The length 1 can also be changed by rotating the clamping sleeves 11 of the individual bolts 7. It is in execution Example, the length 1 (Fig. 1) measured between the respective centers of the connecting bolts 21.

Die Gelenksperre 9 besitzt einen im Seitenprofil U-förmigen Aussteifungsbügel 33, der Teile der U-Schenkel 30 und den gesamten Steg 27 der Gelenksperre 9 aussteifend außen umgreift.The joint lock 9 has a U-shaped stiffening bracket 33 in the side profile, which engages around the outside of parts of the U-legs 30 and the entire web 27 of the joint lock 9.

Besonders in Fig. 3 erkennt man gut, daß wenigstens der Anschlußflansch 20 des Verbindungsstückes 8 an seinem äußeren Ende 34, also im Schwenkbereich der Gelenksperre 9, ein angezogenes, also schmaleres Seitenprofil aufweist, so daß Platz für die Gelenksperren-U-Schenkel 30 vorhanden ist. Am unteren Anschlußflansch 19 ist ein solches, in Richtung der Riegel 7 vorstehendes Ende 34 nicht erforderlich.In particular, in Fig. 3 it can be seen that at least the connecting flange 20 of the connecting piece 8 has an attracted, that is to say narrower side profile at its outer end 34, that is to say in the pivoting range of the articulated lock 9, so that space for the articulated lock U-legs 30 is available is. At the lower connecting flange 19, such an end 34 projecting in the direction of the bolt 7 is not required.

In Fig. 1 sind an der äußeren Schalhaut 3 noch äußere Längsträger 105 erkennbar, die mittels eines im ganzen mit 40 bezeichneten Zuggurtes gehalten sind. Dabei ist dort gut erkennbar, daß sich dieser Zuggurt aus in der Länge L veränderbaren Riegeln 107 sowie aus mit auf den entsprechenden Längsträgern 105 aufgesetzten Verbindungsstücken 8' zusammensetzt. Diese Verbindungsstücke 8' besitzen ebenfalls die Lochungen 18 und die darin eingefügten Anschlußbolzen 21 und Gelenksperren 9 und für den Steckzapfen 28 vorgesehene Einstecklöcher 29 sind hier nicht notwendig und deshalb nicht eingezeichnet. Man erkennt jedoch, daß die eingangs näher beschriebenen Riegel 7 auch als Teile 107 des Zuggurtes 40 in Verbindung mit den dortigen Verbindungsstücken 8 Verwendung finden können. Die Ausbildung der Riegel 7 und der Verbindungsstücke 8 der Schalung 1 für die innere Schalhaut 2 hat demgemäß den Vorteil, daß solche Teile 7 und 8 auch noch zur Bildung eines Zuggurtes 40 herangezogen werden können. Dadurch wird die Lagerhaltung für entsprechende Schalungsteile für Rundbauten bzw. der Ausnutzungsgrad dieser Teile begünstigt. Bedarfsweise können die für die Riegelkette 6 bzw. den Zuggurt 40 verwendeten Riegel 7 bzw. 107 gleich ausgebildet und in unterschiedlicher Länge 1 bzw. L eingestellt sein, es können aber auch bedarfsweise mit unterschiedlicher Grundlänge ausgebildete Riegel 7 bzw. 107 für verschiedene (innere) Riegelketten 6 bzw. Zuggurte 40 Verwendung finden.In FIG. 1, outer longitudinal beams 105 can also be seen on the outer formlining 3, which are held by means of a tension belt, generally designated 40. It can be clearly seen there that this tension belt is composed of bars 107 which can be changed in length L and of connecting pieces 8 'placed on the corresponding longitudinal beams 105'. These connecting pieces 8 'likewise have the perforations 18 and the connecting bolts 21 and joint locks 9 inserted therein and the insertion holes 29 provided for the plug pin 28 are not necessary here and are therefore not shown. However, it can be seen that the bolts 7 described at the beginning can also be used as parts 107 of the tension belt 40 in connection with the connecting pieces 8 there. The formation of the bolt 7 and the connecting pieces 8 of the formwork 1 for the inner formlining 2 accordingly has the advantage that such parts 7 and 8 can also be used to form a tension belt 40. This favors the storage of appropriate formwork parts for circular structures and the degree of utilization of these parts. If necessary, the bolts 7 or 107 used for the bolt chain 6 or the tension belt 40 can be of the same design and can be set to different lengths 1 or L, but if necessary, bolts 7 and 107 formed with different basic lengths can also be used for different (inner) Bar chains 6 or 40 tension straps are used.

In den Figuren 5 bis 11 ist eine Schalung 1 für gekrümmte Flächen od. dgl. mit einer biegsamen, insbesondere konvexen inneren Schalhaut 2 und gegebenenfalls auch einer äußeren Schalhaut 3 dargestellt, die wiederum im Abstand zueinander angeordnete Träger 5 aufweist, welche gegen eine von einer Riegelkette 6 gebildete Gurtung abgestützt sind, wobei die Riegel 7 der Riegelkette 6 in ihrer Länge und ihrer gegenseitigen Winkelposition wiederum gegeneinander verstellbar und festlegbar sind und an den Trägern 5 jeweils Verbindungsstücke 8 angreifen, an denen die Schwenkpunkte der Riegel 7 in Form von Anschlußbolzen 21 angeordnet sind. Dabei ist in diesen Ausführungsbeispielen vorgesehen, daß das Verbindungsstück 8 jeweils selbst ein Teil der Gelenksperre zum Festlegen der Riegel in ihrer jeweiligen Winkellage ist bzw. wenigstens einen Teil dieser Gelenksperre enthält.FIGS. 5 to 11 show a formwork 1 for curved surfaces or the like with a flexible, in particular convex inner formwork skin 2 and possibly also an outer formwork skin 3, which in turn has spaced-apart supports 5 which are against one of a Bolt chain 6 formed straps are supported, the bolts 7 of the bolt chain 6 in their length and their mutual angular position are in turn mutually adjustable and fixable and each engage the connectors 5 on which the pivot points of the bolt 7 are arranged in the form of connecting bolts 21 are. It is provided in these exemplary embodiments that the connecting piece 8 is itself part of the joint lock for fixing the latch in its respective angular position or contains at least part of this joint lock.

Bei der Ausführungsform gemäß den Figuren 6 bis 10 ist zum Festlegen der Riegel 7 in ihrer Winkellage gegenüber dem Verbindungsstück 8 eine Verzahnung 35 vorgesehen, wobei aber auch eine andere in verschiedenen Winkelstellungen zusammenfügbare Kupplung statt einer solchen Verzahnung 35 benutzt werden könnte. Dabei sind gemäß Fig. 9 und 10 Zähne 36 od. dgl. Vorsprünge an dem Verbindungsstück 8 bzw. den zu ihm gehörenden Anschlußflanschen 19 und 20 und dazu passende Zahnlücken 37 od. dgl. Ausnehmungen an dem Riegel 7 vorgesehen.In the embodiment according to FIGS. 6 to 10, a toothing 35 is provided for fixing the bolt 7 in its angular position relative to the connecting piece 8, but another coupling which can be joined together in different angular positions could also be used instead of such a toothing 35. 9 and 10, teeth 36 or the like. Projections on the connecting piece 8 or the connecting flanges 19 and 20 belonging to it and matching tooth gaps 37 or the like. Recesses on the bolt 7 are provided.

Vor allem in Fig. 6 erkennt man, daß an den Stirnseiten des Verbindungsstückes 8 bzw. seiner Flansche 19 und 20 auf einem Kreis um die Schwenkverbindung mit dem Anschlußbolzen 21 zwischen Riegel 7 und Verbindungsstück 8 stirnseitig die Zahnung 35 vorgesehen ist und anhand der Figuren 6 und 7 erkennt man, daß der Riegel 7 aus dem zu ihm gehörenden Gewindebolzen 14 ein mittels einer Mutter 38 axial verstellbares Sperrstück 39 als Teil der Gelenksperre mit einer konkaven Rundung und darin angeordneten Zähnen hat, die mit den Zähnen des Verbindungsstückes 8 zusammenpassen. Dabei ist in Fig. 6 ein relativ stumpfer Winkel zwischen Riegel und Flanschen des Verbindungsstückes dargestellt, jedoch sind gestrichelt die möglichen Endpositionen des Sperrstückes 38 angedeutet, die zu entsprechenden Winkelpositionen einer an einer konvexen oder konkaven Schalhaut angreifenden Riegelkette passen.Especially in Fig. 6 it can be seen that the teeth 35 are provided on the end faces of the connecting piece 8 or its flanges 19 and 20 on a circle around the pivot connection with the connecting bolt 21 between the bolt 7 and the connecting piece 8 and with reference to Figures 6 and 7 it can be seen that the bolt 7 from the threaded bolt 14 belonging to it has an axially adjustable locking piece 39 by means of a nut 38 as part of the articulated lock with a concave curve and teeth arranged therein which match the teeth of the connecting piece 8. 6, a relatively obtuse angle between the bolt and the flanges of the connecting piece is shown, but the possible end positions of the locking piece 38 are indicated by dashed lines, which match the corresponding angular positions of a locking chain engaging a convex or concave formlining.

Auch in diesem Ausführungsbeispiel hat das Verbindungsstück 8 gemäß Fig. 7 zwei parallele Anschlußflansche 19 und 20, von denen wenigstens einer strinseitig eine Verzahnung 35 aufweisen kann. Zwischen die Anschlußflansche 19 und 20 paßt der Anschlußkopf 15 des Gewindebolzens 14 des Riegels 7 und ist mittels des Querbolzens oder Anschlußbolzens 21 verschwenkbar. Auf diesem zu dem Riegel 7 gehörenden Gewindebolzen 14 ist das Sperrstück 39 axial verschiebbar und mittels der auf der dem Verbindungsstück 8 abgewandten Seite angeordneten Mutter 38 abstützbar und in Eingriffstellung der Verzahnungen 35 andrückbar.7 also has two parallel connecting flanges 19 and 20, at least one of which can have teeth 35 on the strins side. Between the connecting flanges 19 and 20, the connecting head 15 of the threaded bolt 14 of the bolt 7 fits and can be pivoted by means of the transverse bolt or connecting bolt 21. The locking piece 39 is axially displaceable on this threaded bolt 14 belonging to the bolt 7 and can be supported by means of the nut 38 arranged on the side facing away from the connecting piece 8 and can be pressed into the engagement position of the toothings 35.

Während in Fig. 6 die Sperrstellung mit eingerückten Zähnen dargestellt ist, erkennt man in Fig. 7, daß die Mutter 38 axial so weit zu der mittleren Spannhülse 11 hin zurückverstellt ist, daß die Zähne 36 und die Zahnlücken 37 der Verzahnung 35 außer Eingriff sind. In dieser in Fig. 7 dargestellten Position kann also auf einfache Weise eine gewünschte Winkelstellung zwischen Riegel und Anschlußflanschen eingestellt werden. Danach werden die Muttern 38 wiederum in Richtung auf die Verbindungsstücke hin verstellt und angezogen, wodurch die Zahnungen in Eingriff gelangen.While the locking position is shown in FIG. 6 with the teeth indented, it can be seen in FIG. 7 that the nut 38 is moved back axially to the central clamping sleeve 11 so that the teeth 36 and the tooth spaces 37 of the toothing 35 are disengaged . In this position shown in FIG. 7, a desired angular position between the bolt and the connecting flanges can thus be set in a simple manner. Thereafter, the nuts 38 are again adjusted towards the connecting pieces and tightened, whereby the teeth come into engagement.

In Fig. 7 erkennt man auch, daß das Sperrstück 39 einen U-förmigen Querschnitt hat, dessen U-Quersteg 41 eine Lochung 42 für den Durchtritt des Gewindebolzens 14 aufweist und dessen U-Schenkel 43 gemäß Fig. 6 und 9 stirnseitig konkav geformt sind, wobei wenigstens ein U-Schenkel 43, im Ausführungsbeispiel beide U-Schenkel mit den Gegenzähnen versehen sind. Dabei sind die Zähne parallel zur Schwenkachse zwischen Riegel 7 und Verbindungsstück 8 angeordnet. Auch beide Anschlußflansche 19 und 20 des Verbindungsstückes 8 haben wie beide U-Schenkel 43 des Sperrstückes 39 jeweils zusammenpassende Zahnungen oder gegebenenfalls auch andere ineinander fügbare Verformungen.In Fig. 7 it can also be seen that the locking piece 39 has a U-shaped cross section, the U-transverse web 41 has a perforation 42 for the passage of the threaded bolt 14 and the U- Legs 43 according to FIGS. 6 and 9 are concavely shaped on the end face, at least one U-leg 43, in the exemplary embodiment both U-legs being provided with the counter teeth. The teeth are arranged parallel to the pivot axis between the bolt 7 and the connector 8. Both connecting flanges 19 and 20 of the connecting piece 8, like both U-legs 43 of the locking piece 39, each have matching toothings or, if appropriate, also other mutually insertable deformations.

Da das Sperrstück 39 mittels seiner Lochung 42 auf dem Gewindebolzen 14 gelagert ist, ist es drehbar, so daß es auch um 180° gedreht werden kann, wodurch es wiederum in eine Kupplungs-und Sperrposition gelangt. Die U-Schenkel 43 passen dabei in beiden Drehstellungen mit den beiden Flanschen 19 und 20 des Verbindungsstückes 8 hinsichtlich Abstand und bezüglich ihrer Verzahnungen zusammen.Since the locking piece 39 is mounted on the threaded bolt 14 by means of its perforation 42, it can be rotated so that it can also be turned through 180 °, which in turn brings it into a coupling and locking position. The U-legs 43 fit in both rotational positions with the two flanges 19 and 20 of the connecting piece 8 in terms of distance and in terms of their teeth.

Um trotz der Zahnungen eine Einstellstufung zu erhalten, die geringer als eine Zahnteilung ist, ist die Durchtrittslochung 42 in dem U-Quersteg 41 des Sperrstückes 39 gegenüber einer durch die Mitte eines mittleren Zahnes 44 verlaufenden Längsmittelebene 45 um ein Viertel der Zahnteilung versetzt. Man erkennt in Fig. 10 deutlich, daß die Lochmitte 46 gegenüber der durch die Spitze eines mittleren Zahnes 44 verlaufenden Längsmittelebene 45 um eine Viertel-Zahnteilung versetzt ist. Wird nun das Sperrstück 39 um 180° gedreht, ergibt sich gegenüber der Position mit durchgezogenen Strichen die Position mit gestrichelten Linien an den Zähnen, so daß allein durch diese Maßnahme schon Einstellwinkel erreichbar sind, deren Stufung gegenüber der Zahnstufung halbiert ist.In order to obtain an adjustment step that is less than one tooth pitch in spite of the serrations, the through-hole 42 in the U-crosspiece 41 of the locking piece 39 is offset by a quarter of the tooth pitch with respect to a longitudinal center plane 45 running through the center of a central tooth 44. It can be clearly seen in FIG. 10 that the center of the hole 46 is offset by a quarter tooth pitch in relation to the longitudinal center plane 45 running through the tip of a central tooth 44. If the locking piece 39 is now rotated by 180 °, the position with dashed lines on the teeth results in relation to the position with solid lines, so that this measure alone makes it possible to achieve setting angles whose gradation is halved compared to the tooth gradation.

Zusätzlich erkennt man aber in Fig. 10, daß die Lochung 42 in dem U-Quersteg 41 des Sperrstückes 39 gegenüber dem Bolzen 14 ein Spiel hat, bei welchem der Durchmesser dieses Loches 42 wenigstens um die Hälfte der Breite der Zahnteilung größer als der Durchmesser des Bolzens 14 ist. Dadurch kann also das Sperrstück 39 um diesen Wert seitlich versetzt werden, so daß beim Aufeinandertreffen der Zahnspitzen der Zähne des Sperrstückes und des Verbindungsstückes dennoch ein Eingriff dieser Zähne durch die erwähnte seitliche Versetzung möglich ist. Insgesamt kann so durch die Kombination der vorbeschriebenen Maßnahmen bei relativ geringem Spiel zwischen Bolzen 14 und Lochung 42 eine stufenlose Winkelverstellung erreicht werden. Wäre das Gesamtspiel des Bolzens 14 gegenüber der Lochung 42 insgesamt entsprechend der Zahnteilung, könnte allein durch diese Maßnahme ebenfalls eine stufenlose Einstellung unterschiedlicher Winkel erfolgen.In addition, it can be seen in Fig. 10 that the perforation 42 in the U-crosspiece 41 of the locking piece 39 has a game with respect to the bolt 14, in which the diameter of this hole 42 is at least half the width of the tooth pitch larger than the diameter of the Bolt 14 is. Thus, the locking piece 39 can be laterally offset by this value, so that when the tooth tips of the teeth of the locking piece and the connecting piece meet, an engagement of these teeth is nevertheless possible by the lateral displacement mentioned. Overall, a stepless angle adjustment can be achieved through the combination of the measures described above with a relatively small clearance between the bolt 14 and the perforation 42. If the overall play of the bolt 14 compared to the perforation 42 as a whole corresponded to the tooth pitch, this measure could also be used to continuously adjust different angles.

Die Zähne und Zahnlücken sind dabei im Querschnitt etwa gleichschenklige Dreiecke.The teeth and tooth gaps are approximately isosceles triangles in cross section.

In dem Ausführungsbeispiel gemäß Figur 11, ist an dem Verbindungsstück 8 ein als Gelenksperre an den beiden gegenüber dem Verbindungsstück 8 schwenkbaren Riegeln 7 angreifendes, quer zu den Riegeln 7 und zu der Schalhaut 2 verstellbares Sperr- und/oder Klemmelement angeordnet, welches form- und/oder kraftschlüssig an den Stirnseiten der Riegel 7 bzw. der ihnen zugehörenden Gewindebolzen 14 angreift.In the exemplary embodiment according to FIG. 11, a locking and / or clamping element is arranged on the connecting piece 8, which acts as a joint lock on the two bars 7 which can be pivoted relative to the connecting piece 8 and which is adjustable transversely to the bars 7 and to the formlining 2 and which has a shape and / or engages non-positively on the end faces of the bolts 7 or the threaded bolts 14 belonging to them.

Bei dem Ausführungsbeispiel gemäß den Figuren 6 bis 10 kann die als axiale Anlage des U-förmigen Sperrstückes 39 vorgesehene Mutter 38 in Sperrstellung bis zur Beseitigung dieses Spieles an den Schwenkbolzen 21 in dem Verbindungsstück 8 angezogen werden. Dadurch ergibt sich eine erhebliche Stabilisierung der gesamten Riegelkette gegen auch beim Betonieren sich vergrößernde Drücke und Kräfte. Darüber hinaus wird an diesen Schwenkbolzen 21 dadurch ein zusätzlicher Kraftschluß bewirkt.In the exemplary embodiment according to FIGS. 6 to 10, the nut 38 provided as the axial contact of the U-shaped locking piece 39 can be tightened in the locking position until the clearance of this play on the pivot pin 21 in the connecting piece 8. This results in a considerable stabilization of the entire bar chain against increasing pressures and forces even when concreting. In addition, an additional frictional connection is effected on this pivot pin 21.

Fig. 11 zeigt ein Ausführungsbeispiel, bei welchem an den beiden Schwenkpunkten eines jeden Riegels 7 jeweils mit einem Ende als Gelenksperren dienende Zugspindeln 60 angreifen, die mit ihrem anderen Ende an einem benachbarten Verbindungsstück 8 und dort mit Abstand zu dem Schwenkpunkt des Riegels 7 bzw. dessen Anschlußbolzen 21 angreifen. Es ergeben sich somit für jeden Riegel 7 zwischen den von diesem verbundenen Verbindungsstücken 8 zwei sich kreuzende Zugspindeln 60. Der die Träger 5 umfassende Befestigungsrücken 22 des Verbindungsstückes 8 übergreift dabei die Seitenwände des Trägers 5 über mehr als den Abstand zwischen dem Schwenkpunkt oder Bolzen 21 des Riegels 7 und dem Angriffspunkt 61 der Zugspindel 60 und weist dabei diesen Angriffspunkt 61 auf. Entsprechend breit ist in diesem Falle der Befestigungsrücken 22 ausgestaltet.Fig. 11 shows an embodiment in which at the two pivot points of each bolt 7 each with one end acting as articulated locks 60 engage with their other end on an adjacent connector 8 and there at a distance from the pivot point of the bolt 7 or attack its connecting bolts 21. This results in two locking spindles 60 for each bolt 7 between the connecting pieces 8 connected to it. The fastening back 22 of the connecting piece 8, comprising the carrier 5, overlaps the side walls of the carrier 5 over more than the distance between the pivot point or bolt 21 of the Bolt 7 and the point of attack 61 of the tension spindle 60 and has this point of attack 61. In this case, the fastening back 22 is designed to be correspondingly wide.

Ist eine entsprechende Winkelstellung an dem Riegel 7 fixiert, können die sich kreuzenden Zugspindeln 60 angezogen werden, um diese Winkelstellung festzulegen. Dabei bildet ein Riegel 7 jeweils zusammen mit einer Zugspindel 60 und dem Befestigungsrücken 22 im Bereich der Angriffspunkte 21 und 61 ein Dreieck, dessen Winkellagen verstellbar und durch die anziehbaren Zugspindeln auch festlegbar sind.If a corresponding angular position is fixed on the bolt 7, the traversing spindles 60 can be tightened in order to fix this angular position. In this case, a bolt 7 forms a triangle in the area of the points of attack 21 and 61 together with a tension spindle 60 and the fastening back 22, the angular positions of which are adjustable and can also be fixed by means of the tightenable tension spindles.

Insgesamt ergibt sich eine Riegelkette, bei welcher die Riegel gut und sicher in unterschiedlichen Winkellagen praktisch stufenlos eingestellt und festgelegt werden können, ohne daß die Gefahr von seitlichen Versetzungen besteht, weil gleichzeitig das Spiel in den Schwenkpunkten ausgeschaltet wird. Entsprechend große Druckkräfte können über diese Riegelkette trotz ihrer Vielgliedrigkeit aufgenommen werden. Die auftretenden Ringkräfte bei einem Rundbau, die über die Träger und Riegel eingeleitet werden, treffen bei den vorbeschriebenen Anordnungen insbesondere gemäß den Figuren 5 bis 11 axial aufeinander und Verschiebungen, die bei exzentrischer Belastung zu der Gefahr von Ausweichbewegungen innerhalb der Riegelkette führen würden, werden verhindert, weil einerseits die Gelenksperren bzw. die dazu gehörenden Sperrstücke und Sperrelemente stirnseitig an den Riegeln angreifen und außerdem das Spiel der Schwenkbolzen aufheben. Zusätzlich wird durch diese Beseitigung des Spieles eine Veränderung der Wandstärke während des Betonierens durch dann eventuell auftretende Nachgiebigkeiten bei Vorhandenbleiben eines solchen Spieles vermieden.Overall, there is a bar chain, in which the bars can be set and fixed practically infinitely and safely in different angular positions, without the risk of lateral displacements, because at the same time the game in the pivot points is switched off. Correspondingly large compressive forces can be absorbed via this locking chain despite their multiple links. The ring forces that occur in a rotunda, which are introduced via the beams and bolts, meet axially in the above-described arrangements, in particular according to FIGS. 5 to 11, and displacements that would lead to the risk of evasive movements within the bolt chain in the event of eccentric loading are prevented , because on the one hand the articulated locks or the associated locking pieces and locking elements engage on the front side of the bolts and also cancel the play of the pivot pins. In addition, this elimination of the game changes the wall thickness ke avoided during concreting by any resilience that may occur if such a game remains.

Die vorbeschriebene Anordnung erlaubt es, die Winkelpositionen zusammen mit der Schalhaut einzustellen, oder aber die Riegelkette mit Trägern versehen in eine bestimmte gerundete Position zu bringen und dann erst an den Trägern die Schalhaut zu befestigen. In letzterem Falle können unter Umständen statt der spindelförmigen Verstellbaren Riegel auch Riegel bleibender Längenabmessungen verwendet werden, insbesondere wenn nur bogenförmige Wandstücke geschalt werden sollen.The arrangement described above makes it possible to adjust the angular positions together with the formlining, or to bring the locking chain provided with carriers into a certain rounded position and only then to fasten the formlining to the carriers. In the latter case, under certain circumstances, bars of permanent length dimensions can also be used instead of the spindle-shaped adjustable bars, in particular if only curved wall pieces are to be formed.

Claims (26)

1. Formwork (1) for circular constructions, including a forming surface (2 ; 3) which is adjustable with respect to the curvature thereof and is fixed to girders (5) shoring it, and further including ties (7) which engage the girders (5) in spaced relationship to the forming surface (2 ; 3), form a chain (6) of ties and are adjustable in their length, adjacent ties (7) of the chain (6) thereof in each case being connected by way of a connecting piece (3) disposed on a girder (5) and each tie (7) engaging the connecting piece (8) by way of a joint of its own, said connecting piece for its part being fixed to the girder (5), the angular position of the ties (7) to one another being variable by changing the length of the ties (7) and the connecting piece (8) having a receiving area (25) for joining heads (15) belonging to the ties (7) and lying adjacent to one another in the chain (6) of ties, characterized in that a joint lock (9) which is adapted to be coupled in a form-locking manner is located on the tie (7) or connecting piece (8) and is provided to fix the annular position of the tie (7) relative to the connecting piece (8).
2. The formwork as claimed in claim 1, characterized in that each tie (7) has a threaded tension sleeve (11) and screwed bolts (14) at both ends thereof, at the outer ends (12, 13) of the latter provision being made in each case for a joining head (15) fixed to the connecting piece (8) preferably by means of a bolt (21).
3. The formwork as claimed in claim 1 or claim 2, characterized in that the connecting piece (8) has a fixing back (22) preferably supported on the profile (23) of longitudinal girders which are known and are already available.
4. The formwork as claimed in any one of claims 1 to 3, characterized in that each receiving area (25) has two parallel joining flanges'(19, 20) featuring holes (18) aligned in pairs for receiving the bolts (21) of the joining heads (15).
5. The formwork as claimed in any one of claims 1 to 4, characterized in that the joint lock (9) thereof has an adjusting and fixing clamp which preferably takes the form of a U-piece or the like, the side face of which is essentially U-shaped, engaging over the end which is near to the tie and belongs to a joining flange (20), the U-piece having in the crosspiece (27) of its U a plug (28), in the associated joining flange (20) provision being made for a slot (29) to receive said plug in such a manner that the joint lock (9) mounted in the connecting piece (8) can adjust itself appropriately to the desired angular position of the tie (7) relative to the connecting piece, and that the joint lock (9) has setting and fixing means (31, 32) acting upon the associated tie (7).
6. The formwork as claimed in claim 5, characterized in that the joint lock (9) has, preferably in its U-sides (30), setting and fixing screws (31, 32) or similar fixing means engaging the joining head (15) on either side and fixing the same in a predetermined angular position (angle A) relative to the connecting piece (8).
7. The formwork as claimed in any one of claims 1 to 6, characterized in that the joining flanges (19, 20) or similar joining parts defining the receiving area (15) of a connecting piece (8) have at their outer ends (34) a drawn-in side face in the swivel region of the U-sides (30) of the joint lock (9).
8. The formwork as claimed in any one of claims 1 to 7, characterized in that there is provided on the joint lock (9) a stiffening bracket (33), the side face of which is essentially U-shaped, outwardly embracing the crosspiece (27) of the U of the joint lock (9) and at least portions of the U-sides (39) thereof.
9. The formwork as claimed in any one of claims 1 to 8, having an outer, pliable forming surface resting upon longitudinal girders which are disposed in spaced relationship to one another, the latter being held by means of a boom, characterized in that the boom (40) is composed of ties which are variable in length (L) and are provided with joining heads (15) as well as with connecting pieces (8') adapted to the respective longitudinal girders (105), in the receiving area of said connecting pieces there being at least holes (18) for bolts (21).
10. Formwork for curved surfaces, including at least a pliable, convex forming surface and possibly for circular constructions including a concave forming surface, featuring girders which are disposed in spaced relationship to one another and are supported against a boom system composed by a chain of ties, the ties of the chain thereof being adapted to be adjusted and fixed in their length and in their angular position relative to one another and the girders in each case being engaged by connecting pieces on which the swivel points of the ties are disposed, as claimed in any one of claims 1 to 4 or 9, characterized in that the connecting piece (8) is itself part of the joint lock or includes at least part of the joint lock.
11. The formwork as claimed in claim 10, characterized in that to fix the ties (7) in their angular position relative to the connecting piece (8) provision is made for a toothing system or a similar coupling joinable in various angular positions, teeth or similar projections being provided on the connecting piece (8) and matching tooth gaps or similar recesses being provided on the tie (7).
12. The formwork as claimed in claim 10 or claim 11, characterized in that the one toothing (35) or the like is provided end-on at the front faces of the connecting piece (8), on a circle about the swivel connection (21) between tie (7) and connecting piece (8) and the tie (7) has a locking piece (39) as part of the joint lock on the screwed bolt (14) belonging to said tie, said locking piece being axially adjustable by means of a nut (38) and having a concavity and teeth or the like which are disposed therein and match the teeth or the like of the connecting piece.
13. The formwork as claimed in any one of claims 10 to 12, characterized in that the connecting piece (8) has two parallel joining flanges (19, 20), at least one of which has a toothing system (35) at the front end, the joining head (15) of the screwed bolt (14) of the tie (7) fitting between said joining flanges and being adapted to be swivelled by means of the crossbolt (21) and that the locking piece (39) is axially displaceable on the screwed bolt (14) belonging to the tie (7) and is adapted to be supported and urged into the position in which the toothing systems (35) or the. like mesh by means of the nut (38) disposed on the side averted from the connecting piece (8).
14. The formwork as claimed in any one of claims 10 to 13, characterized in that the locking piece (39) has a U-shaped cross section, the crosspiece (41) of its U having a hole (42) for the passage of the screwed bolt (14) and the U-sides (43) thereof being of concave shape at the front ends, at least one of the U-sides being provided with counter-teeth.
15. The formwork as claimed in any one of claims 10 to 14, characterized in that the teeth are disposed parallel to the swivel axis between tie (7) and connecting piece (8).
16. The formwork as claimed in any one of claims 10 to 15, characterized in that both joining flanges (19, 20) of the connecting piece (8) and both U-sides (43) of the locking piece (39) have mating toothing or similar deformations fitting into one another.
17. The formwork as claimed in any one of claims 10 to 15, characterized in that the locking piece is rotatable through 180° on the bolt belonging to the tie and in both rotary positions the U-sides alternately fit together with the two flanges of the connecting piece in their distance and with respect to their toothing system.
18. The formwork as claimed in any one of the preceding claims, characterized in that the holes (42) in the crosspiece (41) of the U of the locking piece (39) are offset by a quarter of the width of the base of a tooth or of the tooth pitch relative to a longitudinal bisector extending through the centre of a middle tooth (44) and/or the middle of a tooth gap located in the middle of the U-sides.
19. The formwork as claimed in any one of claims 1 to 18, characterized in that the hole (42) in the crosspiece (41) of the U of the locking piece (39) has a clearance relative to the bolt (14), wherein the diameter of said hole (42) is larger than the diameter of the bolt (14) by at least half the width of a tooth base or of the tooth pitch.
20. The formwork as claimed in any one of claims 1 to 19, characterized in that the total play of the bolt (14) relative to the hole (42) at the crosspiece (41) of the U of the locking piece (39) corresponds as a whole to the tooth pitch.
21. The formwork as claimed in any one of claims 1 to 20, characterized in that the teeth (36) and the tooth gaps (37) are approximately isoscles triangles or trapezoids in cross section.
22. The formwork as claimed in any one of claims 1 to 21, characterized in that a locking and/or clamping element is disposed on the connecting piece (8), engages the two ties (7) capable of swivelling relative to the connecting piece (8) as a joint lock, is adjustable transversely to the ties (8) and vertically to the forming surface (2) and engages the front ends of the ties (7) in a form-locking and/or force-locking manner.
23. The formwork as claimed in any one of the preceding claims, characterized in that provision is made for fixing elements which feature slanted faces or threads to fix the locking pieces or locking elements and simultaneously eliminate the play in the swivel bolts (21).
24. The formwork as claimed in any one of claims 1 to 23, characterized in that in the locking position the nut (38) provided as the axial bearing surface of the U-shaped locking piece (39) is tightened until the play at the swivel bolts (21) in the connecting piece (8) is eliminated.
25. The formwork as claimed in any one of the preceding claims, characterized in that the two swivel points of each tie (7) are engaged by in each case one end of draw spindles (60) serving as joint locks, the other end of said draw spindles engaging an adjacent connecting piece (8), said engagement being made in spaced relationship to the swivel point of the tie (7).
26. The formwork as claimed in claim 25, characterized in that the fixing back (22) belonging to the connecting piece (3) and embracing the girders (5) engages over the side walls of the girder (5) over more than the distance between the swivel point of the tie (7) and the point (61) of engagement of the draw spindle (60) and preferably features said point of engagement.
EP84104458A 1983-09-17 1984-04-19 Scaffolding for curved surfaces Expired EP0139820B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT84104458T ATE41965T1 (en) 1983-09-17 1984-04-19 FORMWORK FOR CURVED SURFACES.
ES534744A ES8504314A1 (en) 1983-09-17 1984-07-31 Improvements to shuttering (formwork) for curved surfaces
NO843651A NO159872C (en) 1983-09-17 1984-09-14 SCREENING FOR ROUND BUILDINGS AND CURVED SURFACES.
DK442684A DK157207C (en) 1983-09-17 1984-09-17 FORWARD FOR CURVED SURFACES, ROUND BUILDINGS AND SIMILAR CONSTRUCTIONS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3333619 1983-09-17
DE3333619A DE3333619C2 (en) 1983-09-17 1983-09-17 Formwork for circular buildings

Publications (3)

Publication Number Publication Date
EP0139820A2 EP0139820A2 (en) 1985-05-08
EP0139820A3 EP0139820A3 (en) 1986-04-02
EP0139820B1 true EP0139820B1 (en) 1989-04-05

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EP84104458A Expired EP0139820B1 (en) 1983-09-17 1984-04-19 Scaffolding for curved surfaces

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Country Link
US (1) US4619433A (en)
EP (1) EP0139820B1 (en)
JP (1) JPS60156863A (en)
CA (1) CA1235586A (en)
DE (2) DE3333619C2 (en)

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Also Published As

Publication number Publication date
DE3333619A1 (en) 1985-04-04
EP0139820A2 (en) 1985-05-08
US4619433A (en) 1986-10-28
DE3333619C2 (en) 1986-05-15
EP0139820A3 (en) 1986-04-02
JPS60156863A (en) 1985-08-17
CA1235586A (en) 1988-04-26
DE3477594D1 (en) 1989-05-11

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