EP0317938B1 - Formwork system - Google Patents

Formwork system Download PDF

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Publication number
EP0317938B1
EP0317938B1 EP88119359A EP88119359A EP0317938B1 EP 0317938 B1 EP0317938 B1 EP 0317938B1 EP 88119359 A EP88119359 A EP 88119359A EP 88119359 A EP88119359 A EP 88119359A EP 0317938 B1 EP0317938 B1 EP 0317938B1
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EP
European Patent Office
Prior art keywords
lever arm
reinforcement
hook part
strips
strip
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 - Lifetime
Application number
EP88119359A
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German (de)
French (fr)
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EP0317938A1 (en
Inventor
Artur Schwörer
Hans Braun
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.)
Peri Werk Artur Schwoerer GmbH and Co KG
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Peri Werk Artur Schwoerer GmbH and Co KG
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Application filed by Peri Werk Artur Schwoerer GmbH and Co KG filed Critical Peri Werk Artur Schwoerer GmbH and Co KG
Priority to AT88119359T priority Critical patent/ATE65283T1/en
Publication of EP0317938A1 publication Critical patent/EP0317938A1/en
Application granted granted Critical
Publication of EP0317938B1 publication Critical patent/EP0317938B1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/04—Connecting or fastening means for metallic forming or stiffening elements, e.g. for connecting metallic elements to non-metallic elements

Definitions

  • the invention relates to a formwork device with at least two formwork panels, each consisting of a formlining and at least at some of its edges substantially perpendicular from its rear protruding reinforcing strips having a plurality of connecting bores, and with at least one connecting element for two adjacent formwork panels, which one through two mutually aligned bores of two reinforcement strips lying directly next to one another has a plug part which can be plugged in and a hook part which branches off from one end thereof and which can be brought into engagement with the reinforcement strip which is facing away from the connection point between the pin and the hook part by pivoting the hook part when the pin part is inserted .
  • one-piece butt clamps are already provided for connecting adjacent formwork panels, which one through Aligned mounting holes plug-in pin part and a hook part connected thereto. After the pin part is inserted through the mounting holes largely without play, the hook part is pivoted downwards and struck in a clamp-like manner over the closely spaced connecting strips of the adjacent formwork panels, causing the connecting strips to pull against one another and thus to the desired connection of the two formwork panels.
  • the advantage of this known butt clamp is that it is possible to work with a single connecting link, but when the hook part is folded down and clamped onto the connecting strip, a force which pulls the two formwork panels together is essentially exerted only at points further away from the formwork skin. The formwork panels are not pulled together optimally on the side where the concrete is backfilled, so that unpleasant impressions and so-called bleeding of the concrete can occur at the connection points of the formwork panels.
  • the aim of the invention is to provide a formwork device of the type mentioned at the outset, with which a secure contraction of adjacent formwork panels is ensured despite the use of a one-piece connecting member, the contraction forces being intended to be as close as possible to the formwork skin and to the rear end of the reinforcement strips.
  • a particularly preferred embodiment of the invention provides that the connecting element is essentially in alignment on the side of the pin part facing away from the hook part with the connecting plane between the hook part and the pin part, when the pin part is inserted into the aligned bores facing the reinforcing strip located on the insertion side and engaging with it, preferably rounded stop edge, that the lever arm has a decreasing cross-section from the pin part and through which two essentially aligned bores of the reinforcement strips, which are at least close to one another, can be passed through until the stop edge on the reinforcement facing away from the lever arm KungsstMail is applied, whereupon by exerting force on the hook part not yet in engagement with the reinforcement strip in the sense of generating a torque around the point of contact of the stop edge on the reinforcement strip, the correspondingly formed concave inner surface of the lever arm is guided along the edge of the bore facing away from
  • the connecting element initially acts as a lever with a very large lever arm ratio between the hand-operated lever arm and the lever arm inserted through the mounting holes, so that with comparatively small hand forces, very considerable contraction forces occur at a short distance opposite reinforcement strips of adjacent formwork panels can be exercised. Since the connecting element is expediently held essentially perpendicular to the level of the formwork at this stage, these contraction forces are exerted on the edge of the bores facing the formwork skin, that is to say relatively close to the formwork skin.
  • the hook part is pivoted about the axis of the pin part until the engaging end of the hook part grasps the connecting strip lying on the side of the first lever arm and engages in positive engagement therewith is coming.
  • contraction forces are also exerted at this point.
  • contracting forces are thus exerted on the two connecting strips of the adjacent formwork panels both near the formlining and near the rear edge of the connecting strips.
  • the supporting surface of the hook part is clamped on the surface of the associated connecting strip on the opposite side of the connecting strip, so that the clamping forces are applied to the connecting strips a relatively long distance between an area near the formwork skin to the rear end of the connecting strips and are therefore relatively evenly distributed.
  • the connecting element according to the invention not only is the provision of large contraction forces achieved during assembly, but it is also ensured that, after assembly, the forces that hold the connecting strips together are effective over the greatest possible depth of the connecting strips, so that they are not as in the known arrangements, the contraction forces are only present in the area of the bores or even only behind.
  • Another advantage of the invention is the large distance between the tension and compression point, which ensures a rigid connection. Since the formwork panels are pulled together relatively close to the side of the formwork device facing the concrete, bleeding of the concrete is also effectively prevented.
  • connecting links according to the invention can be easily removed even under tension (under concrete pressure), since they are tilted out and not pulled out.
  • An advantageous development of the invention is characterized in that the concave inner surface of the lever arm is curved in the direction perpendicular to the central axes, that it has the largest possible line of contact or area with the edge of the hole when in contact with the edge of the hole. This results in a relatively large-area contact of the lever arm with the relevant edge of the bore of the connecting strip, so that the surface forces when inserting the connecting member and contracting the connecting strips are limited.
  • the lever arm can initially be inserted into the mutually aligned bores of two connecting strips without effort, until the free end of the lever arm emerges on the opposite side of the bores. If the hook part is now pivoted in its plane in such a way that the lever arm reaches around the end of the bore, the concave inner surface of the lever arm comes into engagement with the trailing edge of the rear bore, and this engagement takes into account with increasing pivoting of the hook part and entry of the pin part the bores steadily, which results in the contraction of the two connecting strips in a particularly uniform manner. In other words, the contraction forces increase continuously until the reinforcement strips lie against one another in the desired manner.
  • the hook part on the side of the reinforcement strips facing away from its engaging end is at a clear distance from the reinforcement strip in the assembled state. In this way, during assembly, the hook part can be pivoted resiliently a little further than its end position, in the tensioning direction, whereupon the tilting into the engagement position with the reinforcing strip is facilitated.
  • lever arm has essentially the shape of an arc which extends over an angle of 180 °. It is also advantageous if the lever arm tapers continuously starting from the pin part.
  • an advantageous development of the invention provides that the lever arm has an essentially round cross section on the pin part elliptical cross section merges in the area of the outer end surface, the longer ellipse axis preferably running perpendicular to the plane of the central axes and the end surface being flattened to form a larger contact surface.
  • the stop edge is part of a flange extending around the pin part. Normally, no force should be exerted on the connecting strips from the stop when assembled, since this function is reserved for the support surface on the hook part. In principle, however, at least part of the supporting force on the side facing away from the lever arm and the engagement end could also be transmitted to the connecting strips via the relevant flange. According to an alternative embodiment, the region of the flange facing the hook part could serve as a supporting surface of the hook part on the connecting strip.
  • a uniform distribution of the contraction forces can be promoted in that the additional support surface lies essentially halfway between the end surface of the lever arm and the engaging end of the hook part.
  • the counter-lever arm formed by the hook part is five to fifteen and in particular approximately ten times as long as the distance between the end face of the lever arm and the Stop edge is present.
  • the pin part has the surface shape of a section of a ball with a diameter has the same diameter as the pin part.
  • the angle between the longitudinal axis of the reinforcing strip and the plane of the central axes of the connecting member is 15 to 45 °, in particular 20 to 40 ° preferably 25 to 35 ° and generally about 30 °.
  • Another embodiment is characterized in that the support surface - in the assembled state - projects a little further in the direction of the reinforcement strips than the stop edge.
  • the support surface comes into engagement with the surface of the associated reinforcement strip, as a result of which the support point is moved much further away from the lever arm in the direction of the hook part, which is an indication for the operator that the required degree of contraction of the two formwork panels is now is reached and the hook part can be pivoted in the direction of the reinforcement strips around the axis of the pin part until the engaging end of the hook part has been pushed behind the reinforcement strips and has come into engagement therewith.
  • the greater distance of the support surface from the end surface of the lever arm relative to the distance from the stop edge to the end surface of the lever arm has the further advantage that larger tolerances of the connecting strips or their Relative arrangement can be better compensated for each other.
  • a further advantageous embodiment is characterized in that the engagement end of the hook part in the assembled state includes a small angle of preferably 3 ° to 10 ° and in particular approximately 6 ° in view of the rear side of the reinforcement strips. In this way, thickness tolerances in the area of the reinforcement strips lying one on top of the other can be compensated particularly well.
  • the engagement end of the hook part is linear or when pivoting towards the connecting strip on the rear edge of the connecting strips.
  • the angles in each flal should be kept so small that self-locking occurs in connection with the existing frictional forces.
  • the engagement end on both sides of a central longitudinal plane has inclined surfaces which are mirror images of one another, such that a line or. strip-shaped jamming between the engagement end and the reinforcement strips can be made regardless of the side from which the lever arm is inserted into the aligned holes.
  • the engagement end of the hook part is symmetrical in the sense that the connecting member can be inserted into the aligned connecting bores from both sides.
  • the connecting link according to the invention can therefore be easily inserted by right-handed as well as left-handed people from one or the other side into the bores that are covered and then pivoted downwards or upwards.
  • each formwork panel 23 consists of a preferably flat formwork skin 11, preferably of rectangular or square shape.
  • the formwork 11 with rigid steel reinforcement strips 15, 15 ' are firmly connected in a manner not shown.
  • the reinforcement strips 15 thus extend perpendicular to the formwork skins 11 and have a constant depth and thickness over their entire length.
  • rigid reinforcement bands 24 which extend perpendicularly to the reinforcement strips 15, 15' and to the formwork skins 11 and, like the reinforcement strips 15, 15 ', to reinforce the formwork skins 11 serve.
  • the liquid concrete is later introduced into the space 25 in front of the formwork skins 11 after the formwork device has been installed.
  • the holes 14 are about half the depth of the reinforcing strips 15, 15 ', i.e. approximately on the central longitudinal axis 21 (FIG. 3) of the reinforcing strips 15.
  • the connecting link according to the invention for two formwork panels 23 consists of a hook-shaped curved hook part 12 with a free engagement end 12 'and a flange 16 having a stop edge 16, at the opposite end and a pin part 17 projecting essentially perpendicularly and a subsequent one in the same Senses like the hook part 12 curved or kinked lever arm 13, with a concavely curved inner surface 31.
  • the pin part 17 has a slightly smaller diameter than the holes 14, 14 'and is slightly spherical on its circumference in the manner shown in FIGS. 1 and 2, the center of the ball on its central axis 26 at half the axial Length of the pin part 17 is.
  • the length of the pin part 17 corresponds directly to the total length of two according to FIGS. 1 and 2 successive holes 14. In other words, the length of the pin part 17 is approximately twice as large as the thickness of one of the same thickness reinforcing strips 15 or 15 '.
  • the lever arm 13 begins in the region of the flange 16 'facing the end of the pin part 17 with the same diameter as the pin part 17 at this point and then tapers steadily to its end face 18. At the same time, the lever arm 13 is curved so that it is in the side view of FIGS. 1 and 2 has approximately sickle shape.
  • the cross section of the pin part 17 is circular at the beginning and changes continuously towards the surface 18 into an elliptical shape (FIG. 3).
  • the flange 16 carrying the stop edge 16 ' has a flat surface 30 towards the pin part 17, from which the pin part 17 rises vertically.
  • On the engaging end 12 'facing surface of the hook part 12 is at a distance from the flange 16' a flat support surface 20 which protrudes slightly further in the direction of the pin part 17 than the flat surface 30 of the flange 16 '.
  • the hook part 12 - starting from the flange 16 '- initially approximately up to the height of the support surface 20 substantially perpendicular to the axis 26 of the pin part 17, to then bend slightly in the direction away from the lever arm 13.
  • a clear, initially increasing and then decreasing distance 19 is created between the regions of the hook part 12 which are somewhat further away from the flange 16 and the reinforcing strips 15.
  • the central axis 27 of the hook part 12, the central axis 26 of the pin part 17 and the central axis 28 of the lever arm 13 1 preferably lie in a plane in which the longitudinal axis 22 of the connecting element 12, 13, 16, 17 according to the invention also lies according to the view in FIG. 3.
  • the two formwork panels 23 to be connected according to FIGS. 1 and 2 are placed side by side until two mounting holes 14 are in alignment with one another.
  • the connecting member is inserted in the manner shown in FIG. 1 from the side with the lever arm 13 ahead into the aligned bores 14, 14 '.
  • the coinciding with the longitudinal axis 22 plane 26, 27, 28 is substantially perpendicular to the planes de connecting strips 15. It is important that the holes 14, 14 'from the rear surfaces of the formwork 11 have such a distance that for the hook part 12 and the flange 16 'sufficient space is available to introduce the tapered curved lever arm 13 into the holes 14, 14' in the manner shown in Fig. 1.
  • the connecting member is pivoted according to the arrow F in Fig.
  • the connecting member is now on the end surface 18, on the support surface 20 and finally at the location 40 indicated in Fig. 3 of the engagement end 12 'in clamping connection with the surfaces of the reinforcing strips 15, 15'.
  • the clamping forces K1, K2 and K3 are indicated schematically in FIG. 2. They act alternately from opposite sides on the reinforcement strips 15, 15 '.
  • Corresponding connecting links can now be arranged at desired intervals in further pairs of mounting holes 14, 14 'as desired, in order to achieve a rigid connection of all formwork panels 23 to be connected to one another.
  • the connecting member can also be removed very easily from the formwork panels, since at most light hammer blows only have to be exerted essentially in the longitudinal direction of the reinforcing strips 15 and not perpendicular to their surfaces. In the latter case, there could be a resilient yield when hitting, which would make loosening difficult.
  • the hook part 12 is shown in an intermediate position between the starting position shown in dashed lines and the end position according to FIGS. 2 and 3.
  • Figure 4 shows a section perpendicular to the longitudinal axis 41 of the engaging end 12 'along line IV-IV in Figure 2.
  • the surface 42 of the engaging end 12' engaging with the reinforcing strips 15 ' is also formed obliquely to in cooperation with the oblique arrangement of this surface according to Figure 2 to achieve a linear or strip-shaped contact surface between the rear edge of the reinforcing strip 15 'and the engagement end 12'.
  • the inventive design of the hook part 12, the pin part 17 and the lever arm 13 has the further advantage that self-locking occurs even when the hook part 12 is not yet in engagement with the reinforcing strips 15 (Fig. 5). This is particularly due to the inventive design of the stop edge 16 and the end surface 18. The advantage is greater security against accidental loosening of the connecting link.
  • Thickness tolerances can be easily compensated for due to the wedge-shaped surface 42, 42 '; in particular, when swinging down the hook part 12 there is a uniformly increasing tension between the connecting member and the reinforcing strips 15, 15 '.

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Abstract

A connecting element is provided for connecting together adjacent shuttering panels of the kind in which reinforcement strips with rows of holes provided therein are arranged at the edges of the shuttering panels and are dipsosed perpendicular thereto. The connecting element consists essentially of a curved lever arm (13) which tapers from a spigot part (17) to an end surface (18). The spigot part (17) adjoins a handle portion of the connecting element at a flange (16') defining an abutment edge (16). The handle portion is curved in essentially U-shaped manner and has a support surface (20) at the inside of its limb connected to the spigot portion (17). In operation the engagement end (18) of the lever arm is first introduced through two aligned holes in the adjacent reinforcement strips of two adjacent shuttering panels and the connecting element is then rotated about the abutment edge (16) so as to cause the spigot part (17) to enter into the two aligned bores. During this the lever arm clamps the two reinforcement strips together. In the engaged position shown in FIG. 2 the support surface (20) contacts one side of one of the connecting strips and the engagement surface (18) contacts the opposite side of the other reinforcement strip. The U-shaped handle of the connecting element has been pivoted downwardly so that the abutment end (12') thereof engages against the same side of the reinforcement strip (15') as the engagement surface (18). In this position the connecting element is reliably locked in place and the shuttering panels are reliably connected together.

Description

Die Erfindung betrifft eine Schalungsvorrichtung mit wenigstens zwei Schaltafeln, die jeweils aus einer Schalhaut und zumindest an einigen von deren Rändern im wesentlichen senkrecht von ihrer Rückseite vorstehenden, eine Vielzahl von Verbindungsbohrungen aufweisenden Verstärkungsstreifen besteht, und mit wenigstens einem Verbindungsglied für zwei benachbarte Schaltafeln, welches ein durch zwei miteinander ausgerichtete Bohrungen zweier unmittelbar aneinander liegender Verstärkungsstreifen steckbares Zapfenteil und ein von dessen einem Ende abzweigendes Hakenteil aufweist, das durch Verschwenken des Hakenteils bei eingestecktem Zapfenteil in Eingriff mit demjenigen Verstärkungsstreifen bringbar ist, der von der Verbindungsstelle zwischen dem Zapfen und dem Hakenteil abgewandt ist.The invention relates to a formwork device with at least two formwork panels, each consisting of a formlining and at least at some of its edges substantially perpendicular from its rear protruding reinforcing strips having a plurality of connecting bores, and with at least one connecting element for two adjacent formwork panels, which one through two mutually aligned bores of two reinforcement strips lying directly next to one another has a plug part which can be plugged in and a hook part which branches off from one end thereof and which can be brought into engagement with the reinforcement strip which is facing away from the connection point between the pin and the hook part by pivoting the hook part when the pin part is inserted .

Es ist bereits bekannt, die Schaltafeln derartiger Schalungsvorrichtungen unmittelbar neben- oder übereinander in Fluchtung derart anzuordnen, daß die Halterungsbohrungen der am Rande der Schaltafeln unmittelbar aneinanderliegenden Verstärkungsstreifen miteinander ausgerichtet sind. Durch die miteinander ausgerichteten Halterungsbohrungen können dann z.B. Bolzen gesteckt werden, die mittels Keilen festgelegt werden, wobei durch die Keilwirkung auch die Verstärkungsstreifen und damit die von Ihnen gehaltenen Schalhäute gegeneinander gezogen werden. Es wird dabei angestrebt, den zwischen benachbarten Schaltafeln befindlichen Spalt so klein wie möglich zu halten.It is already known to arrange the formwork panels of such formwork devices directly next to one another or one above the other in such a way that the mounting bores of the reinforcement strips directly adjacent to one another on the edge of the formwork panels are aligned with one another. The aligned mounting holes can then e.g. Bolts are inserted, which are fixed by means of wedges, whereby the reinforcement strips and thus the formwork skins held by you are pulled against each other by the wedge effect. The aim is to keep the gap between adjacent formwork panels as small as possible.

Weiter sind zur Verbindung benachbarter Schaltafeln auch schon einteilige Stoßklemmen vorgesehen, die einen durch die ausgerichteten Halterungsborhrungen steckbaren Zapfenteil und einen damit verbundenen Hakenteil aufweisen. Nachdem der Zapfenteil weitgehend spielfrei durch die Halterungsborhrungen gesteckt ist, wird der Hakenteil nach unten geschwenkt und klemmenartig über die dicht beieinanderliegenden Verbindungsstreifen der benachbarten Schaltafeln geschlagen, wodurch es zu einem Gegeneinanderziehen der Verbindungsstreifen und somit zur gewünschten Verbindung der beiden Schaltafeln kommt. Der Vorteil dieser bekannten Stoßklemme besteht darin, daß mit einem einzigen Verbindungsglied gearbeitet werden kann, doch wird beim Herunterklappen und Aufklemmen des Hakenteils auf die Verbindungsstreifen eine die beiden Schaltafeln zusammenziehende Kraft im wesentlichen nur an von der Schalhaut weiter entfernten Stellen ausgeübt. Die Schaltafeln werden also gerade auf der Seite, wo der Beton hinterfüllt wird, nicht optimal zusammengezogen, so daß es an den Verbindungsstellen der Schaltafeln zu unschönen Abdrücken und zum sogenannten Ausbluten des Betons kommen kann.Furthermore, one-piece butt clamps are already provided for connecting adjacent formwork panels, which one through Aligned mounting holes plug-in pin part and a hook part connected thereto. After the pin part is inserted through the mounting holes largely without play, the hook part is pivoted downwards and struck in a clamp-like manner over the closely spaced connecting strips of the adjacent formwork panels, causing the connecting strips to pull against one another and thus to the desired connection of the two formwork panels. The advantage of this known butt clamp is that it is possible to work with a single connecting link, but when the hook part is folded down and clamped onto the connecting strip, a force which pulls the two formwork panels together is essentially exerted only at points further away from the formwork skin. The formwork panels are not pulled together optimally on the side where the concrete is backfilled, so that unpleasant impressions and so-called bleeding of the concrete can occur at the connection points of the formwork panels.

Das Ziel der Erfindung besteht darin, eine Schalungsvorrichtung der eingangs genannten Gattung zu schaffen, mit der trotz Verwendung eines einteiligen Verbindungsgliedes eine sichere Zusammenziehung benachbarter Schaltafeln gewährleistet ist, wobei die Zusammenziehkräfte sowohl möglichst nahe der Schalhaut als auch am rückwärtigen Ende der Verstärkungsstreifen vorliegen sollen.The aim of the invention is to provide a formwork device of the type mentioned at the outset, with which a secure contraction of adjacent formwork panels is ensured despite the use of a one-piece connecting member, the contraction forces being intended to be as close as possible to the formwork skin and to the rear end of the reinforcement strips.

Zur Lösung dieser Aufgabe sind die Merkmale des kennzeichnenden Teils des Patentanspruchs 1 vorgesehen.To achieve this object, the features of the characterizing part of claim 1 are provided.

Auf diese Weise werden die beiden Verbindungsstreifen der benachbarten Schaltafeln durch Anliegen der Abstützfläche des Hakenteils an der einen Seite der aufeinanderliegenden Verstärkungsstreifen und der Endfläche des Hebelarms und des Eingriffsendes des Hakenteils auf der anderen Seite der Verstärkungsstreifen fest gegeneinander verspannt, und zwar über eine relativ lange Strecke, die sich von einem Ort nahe der Schalhaut bis zur rückwärtigen Kante der Verstärkungsstreifen erstreckt. Gleichwohl wird durch das die Bohrungen durchsetzende Zapfenteil die erwünschte formschlüssige Verbindung der beiden Schaltafeln gewährleistet.In this way, the two connecting strips of the adjacent formwork panels by resting the support surface of the hook part on one side of the superimposed reinforcement strips and the end surface of the lever arm and The end of the engagement of the hook part on the other side of the reinforcement strips is firmly clamped against one another, namely over a relatively long distance, which extends from a location near the formlining to the rear edge of the reinforcement strips. Nevertheless, the desired positive connection of the two formwork panels is ensured by the pin part passing through the bores.

Um beim Einsetzen des Verbindungsglieds in die ausgerichteten Bohrungen zweier wenigstens annähernd aneinanderliegender Verbindungsstreifen auch eine die beiden Verbindungsstreifen aufeinander zu ziehende Kraft zu erzielen, sieht eine besonders bevorzugte Ausführungsform der Erfindung vor, daß das Verbindungsglied auf der vom Hakenteil abgewandten Seite des Zapfenteils im wesentlichen in Ausrichtung mit der Verbindungsebene zwischen dem Hakenteil und dem Zapfenteil eine beim Einführen des Zapfenteils in die ausgerichteten Bohrungen dem auf der Einführungsseite befindlichen Verstärkungsstreifen zugewandte und mit diesem in Eingriff tretende, vorzugsweise abgerundete Anschlagkante aufweist, daß der Hebelarm einen vom Zapfenteil aus abnehmenden Querschnitt aufweist und durch die beiden im wesentlichen miteinander ausgerichteten Bohrungen der zumindest nahe beieinanderliegenden Verstärkungsstreifen hindurchführbar ist, bis die Anschlagkante an dem vom Hebelarm abgewandten Verstärkungsstreifen anliegt, worauf durch Kraftausübung auf das noch nicht in Eingriff mit dem Verstärkungsstreifen befindliche Hakenteil im Sinne der Erzeugung eines Drehmoments um den Anlagepunkt der Anschlagkante am Verstärkungsstreifen die entsprechend ausgebildete konkave Innenfläche des Hebelarms an der der Schalhaut zugewandten Kante der von der Einführungsseite abgewandten Bohrung entlanggeführt bzw. bei noch nicht vollständig aneinanderliegenden Verstärkungsstreifen gegen die Kante gedrückt und zur Zusammenziehung der noch nicht vollständig aneinanderliegenden Verstärkungsstreifen in Gleitverbindung über die Kante hinweggeschoben wird, bis der Zapfenteil sich innerhalb der Bohrungen befindet und die vom Hakenteil abgewandte äußere Endfläche des Hebelarms am von der Verbindungsebene abgewandten Verstärkungsstreifen sowie die Abstützfläche an dem zugeordneten Verbindungsstreifen zur Anlage kommen, worauf das Eingriffsende des Hakenteils in Eingriff mit dem zugeordneten Verbindungsstreifen geschwenkt wird.In order to also achieve a force to pull the two connecting strips towards each other when inserting the connecting element into the aligned bores of two at least approximately adjacent connecting strips, a particularly preferred embodiment of the invention provides that the connecting element is essentially in alignment on the side of the pin part facing away from the hook part with the connecting plane between the hook part and the pin part, when the pin part is inserted into the aligned bores facing the reinforcing strip located on the insertion side and engaging with it, preferably rounded stop edge, that the lever arm has a decreasing cross-section from the pin part and through which two essentially aligned bores of the reinforcement strips, which are at least close to one another, can be passed through until the stop edge on the reinforcement facing away from the lever arm Kungsstreifen is applied, whereupon by exerting force on the hook part not yet in engagement with the reinforcement strip in the sense of generating a torque around the point of contact of the stop edge on the reinforcement strip, the correspondingly formed concave inner surface of the lever arm is guided along the edge of the bore facing away from the insertion side on the edge facing the formlining or pressed against the edge in the case of reinforcement strips which are not yet completely adjacent and to contract the reinforcement strips which are not yet completely adjacent is slid over the edge until the pin part is within the bores and the outer end surface of the lever arm facing away from the hook part comes into contact with the reinforcement strip facing away from the connecting plane and the support surface comes into contact with the associated connecting strip, whereupon the engagement end of the hook part engages with the associated connecting strip is pivoted.

Der wesentliche Grundgedanke dieser Ausführungsform ist darin zu sehen, daß das Verbindungsglied zunächst als ein Hebel mit einem sehr großen Hebelarmverhältnis zwischen dem von Hand betätigten Hebelarm und dem durch die Halterungsbohrungen gesteckten Hebelarm wirkt, wodurch mit vergleichsweise geringen Handkräften ganz erhebliche Zusammenziehkräfte auf die in geringem Abstand gegenüberliegenden Verstärkungsstreifen benachbarter Schaltafeln ausgeübt werden können. Da das Verbindungsglied in diesem Stadium zweckmäßig im wesentlichen senkrecht zur Ebene der Schalhäute gehalten wird, werden diese Zusammenziehkräfte an der der Schalhaut zugewandten Kante der Bohrungen, also relativ nahe der Schalhaut ausgeübt. Sobald die beiden benachbarten Schaltafeln auf diese Weise so nah wie möglich aneinander herangezogen worden sind, wird der Hakenteil um die Achse des Zapfenteils so lange geschwenkt, bis das Eingriffsende des Hakenteils den auf der Seite des ersten Hebelarms liegenden Verbindungsstreifen erfaßt und mit diesem in formschlüssigen Eingriff kommt. Da das Eingriffsende des Hakenteils relativ nahe dem rückwärtigen Ende der Verstärkungsstreifen mit diesen in Eingriff kommt, werden auf diese Weise Zusammenziehkräfte auch an dieser Stelle ausgeübt. Entlang der schrägstehenden Achse des Verbindungsgliedes werden also Zusammenziehkräfte auf die beiden Verbindungsstreifen der benachbarten Schaltafeln sowohl nahe der Schalhaut als auch nahe der rückwärtigen Kante der Verbindungsstreifen ausgeübt. Zwischen den beiden Kräfte ausübenden Flächen auf der einen Seite der aneinanderliegenden Verbindungsstreifen, nämlich der Enfläche des Hebelarms und dem Eingriffsende des Hakenteils, liegt auf der entgegengesetzten Seite der Verbindungsstreifen die Abstützfläche des Hakenteils auf der Oberfläche des zugeordneten Verbindungsstreifens klemmend an, so daß die Klemmkräfte auf die Verbindungsstreifen über eine relativ lange Strecke zwischen einem Bereich nahe der Schalhaut bis zum rückwärtigen Ende der Verbindungsstreifen ausgeübt werden und daher relativ gleichmäßig verteilt sind.The essential basic idea of this embodiment is that the connecting element initially acts as a lever with a very large lever arm ratio between the hand-operated lever arm and the lever arm inserted through the mounting holes, so that with comparatively small hand forces, very considerable contraction forces occur at a short distance opposite reinforcement strips of adjacent formwork panels can be exercised. Since the connecting element is expediently held essentially perpendicular to the level of the formwork at this stage, these contraction forces are exerted on the edge of the bores facing the formwork skin, that is to say relatively close to the formwork skin. As soon as the two adjacent formwork panels have been drawn as close as possible to one another, the hook part is pivoted about the axis of the pin part until the engaging end of the hook part grasps the connecting strip lying on the side of the first lever arm and engages in positive engagement therewith is coming. In this way, since the engaging end of the hook part comes into engagement with the reinforcing strips relatively near the rear end, contraction forces are also exerted at this point. Along the inclined axis of the connecting member, contracting forces are thus exerted on the two connecting strips of the adjacent formwork panels both near the formlining and near the rear edge of the connecting strips. Between the two Force-exerting surfaces on one side of the adjoining connecting strips, namely the end surface of the lever arm and the engaging end of the hook part, the supporting surface of the hook part is clamped on the surface of the associated connecting strip on the opposite side of the connecting strip, so that the clamping forces are applied to the connecting strips a relatively long distance between an area near the formwork skin to the rear end of the connecting strips and are therefore relatively evenly distributed.

Durch das erfindungsgemäße Verbindungsglied wird also nicht nur die Bereitstellung großer Zusammenziehkräfte während der Montage erzielt, sondern es wird darüber hinaus auch gewährleistet, daß nach der Montage die die Verbindungsstreifen zusammenhaltenden Kräfte über eine möglichst große Tiefe der Verbindungsstreifen verteilt wirksam sind, so daß nicht wie bei den bekannten Anordnungen die Zusammenziehkräfte nur im Bereich der Bohrungen oder sogar nur dahinter vorliegen.With the connecting element according to the invention, not only is the provision of large contraction forces achieved during assembly, but it is also ensured that, after assembly, the forces that hold the connecting strips together are effective over the greatest possible depth of the connecting strips, so that they are not as in the known arrangements, the contraction forces are only present in the area of the bores or even only behind.

Einen weiteren Vorteil der Erfindung stellt der große Abstand von Zug- und Druckpunkt dar, welcher für eine biegesteife Verbindung sorgt. Da die Schaltafeln relativ nahe an der dem Beton zugewandten Seite der Schalungsvorrichtung zusammengezogen werden, wird auch ein Ausbluten des Betons wirksam verhindert.Another advantage of the invention is the large distance between the tension and compression point, which ensures a rigid connection. Since the formwork panels are pulled together relatively close to the side of the formwork device facing the concrete, bleeding of the concrete is also effectively prevented.

Weiter ist es vorteilhaft, daß die erfindungsgemäßen Verbindungsglieder auch unter Spannung (unter Betondruck) leicht herausnehmbar sind, da sie herausgekippt und nicht herausgezogen werden.It is also advantageous that the connecting links according to the invention can be easily removed even under tension (under concrete pressure), since they are tilted out and not pulled out.

Eine vorteilhafte Weiterbildung der Erfindung kennzeichnet sich dadurch, daß die konkave Innenfläche des Hebelarms in Richtung senkrecht zu den Mittelachsen derart gekrümmt ist, daß sie beim Anliegen an der Lochkante eine möglichst große Berührungslinie bzw. -fläche mit der Lochkante besitzt. Hierdurch wird eine relativ großflächige Anlage des Hebelarms an der betreffenden Kante der Bohrung des Verbindungsstreifens erzielt, so daß die Flächenkräfte beim Einsetzen des Verbindungsgliedes und dem Zusammenziehen der Verbindungsstreifen begrenzt sind.An advantageous development of the invention is characterized in that the concave inner surface of the lever arm is curved in the direction perpendicular to the central axes, that it has the largest possible line of contact or area with the edge of the hole when in contact with the edge of the hole. This results in a relatively large-area contact of the lever arm with the relevant edge of the bore of the connecting strip, so that the surface forces when inserting the connecting member and contracting the connecting strips are limited.

Mittels dieser Ausführungsform erreicht man, daß der Hebelarm zunächst zwanglos ohne Kraftaufwendung in die miteinander ausgerichteten Bohrungen zweier Verbindungsstreifen eingeführt werden kann, bis das freie Ende des Hebelarms auf der gegenüberliegenden Seite der Bohrungen austritt. Wird nunmehr der Hakenteil in seiner Ebene in der Weise verschwenkt, daß der Hebelarm um das Bohrungsende herumgreift, so kommt die konkave Innenfläche des Hebelarms mit der Austrittskante der hinteren Bohrung in Eingriff, und dieser Eingriff nimmt mit zunehmendem Schwenken des Hakenteils und Eintreten des Zapfenteils in die Bohrungen stetig zu, was das Zusammenziehen der beiden Verbindungsstreifen in besonders gleichmäßiger Weise zur Folge hat. Mit anderen Worten steigen die Zusammenziehkräfte stetig an, bis die Verstärkungsstreifen in der gewünschten Weise aneinanderliegen.By means of this embodiment, it is achieved that the lever arm can initially be inserted into the mutually aligned bores of two connecting strips without effort, until the free end of the lever arm emerges on the opposite side of the bores. If the hook part is now pivoted in its plane in such a way that the lever arm reaches around the end of the bore, the concave inner surface of the lever arm comes into engagement with the trailing edge of the rear bore, and this engagement takes into account with increasing pivoting of the hook part and entry of the pin part the bores steadily, which results in the contraction of the two connecting strips in a particularly uniform manner. In other words, the contraction forces increase continuously until the reinforcement strips lie against one another in the desired manner.

Eine automatische Sicherung der Verbindungsglieder gegen versehentliches Herausfallen wird dadurch gewährleistet, daß die Anschlagkante und die Endfläche des Hebelarms in der Ebene der Mittelachsen derart zueinander versetzt sind, daß durch die beiden miteinander zu verbindenden Verbindungsstreifen auseinandertreibende Kräfte ein das Verbindungsglied in seine Eingriffstellung zu vorspannendes Moment erzielt wird, wenn das Verbindungsglied sich bereits in einer die Verbindungsstreifen zusammenhaltenden Eingriffsposition befindet, welche nicht mehr weit entfernt von der Position im fertig montierten Zustand liegt.An automatic securing of the connecting links against inadvertent falling out is ensured in that the stop edge and the end face of the lever arm are offset from one another in the plane of the central axes in such a way that the two connecting strips to be connected to one another drive forces the connecting link into its engagement position to be pretensioned when the connecting link is already in an engagement position which holds the connecting strips together and which is no longer far from the position in the fully assembled state.

Auf diese Weise wird erreicht, daß für den Fall, daß das Eingriffsende des Hakenteils noch nicht oder nicht mehr im Eingriff mit den Verbindungsstreifen steht, nicht durch etwaige, die Verbindungsstreifen voneinander wegdrückende Kräfte aus der Position, wo sich das Zapfenteil innerhalb der Bohrungen befindet, herausgedrückt wird. Durch die erwähnte Versetzung der Kräfte von den Verbindungsstreifen aufnehmenden Flächen wird erfindungsgemäß von den durch die auseinandergedrückten Verbindungsstreifen auf das Verbindungsglied ausgeübten Kräfte ein Moment erzeugt, das das Verbindungsglied automatisch in die Richtung vorspannt, in der es seine Position, bei der sich das Zapfenteil im wesentlichen innerhalb der Bohrungen befindet, beibehält.In this way it is achieved that, in the event that the engagement end of the hook part is not yet or no longer in engagement with the connecting strips, not by any forces pushing the connecting strips away from one another from the position where the pin part is located within the bores, is pushed out. Due to the aforementioned displacement of the forces from the connecting strip-receiving surfaces, a moment is generated according to the invention from the forces exerted on the connecting element by the pressed-apart connecting strips, which automatically prestresses the connecting element in the direction in which it is in its position, in which the pin part essentially located within the holes.

Besonders vorteilhaft ist es, wenn der Hakenteil auf der von seinem Eingriffsende abgewandten Seite der Verstärkungsstreifen im montierten Zustand einen deutlichen Abstand von dem Verstärkungsstreifen aufweist. Auf diese Weise kann das Hakenteil bei der Montage federnd noch etwas weiter, als es seiner Endstellung entspricht, in Spannrichtung verschwenkt werden, worauf dann das Kippen in die Eingriffsstellung mit dem Verstärkungsstreifen erleichtert ist.It is particularly advantageous if the hook part on the side of the reinforcement strips facing away from its engaging end is at a clear distance from the reinforcement strip in the assembled state. In this way, during assembly, the hook part can be pivoted resiliently a little further than its end position, in the tensioning direction, whereupon the tilting into the engagement position with the reinforcing strip is facilitated.

Ein weitere vorteilhafte Ausführungsform kennzeichnet sich dadurch, daß der Hebelarm im wesentlichen die Form eines Bogens hat, der sich über einen Winkel von 180° erstreckt. Vorteilhaft ist es weiter, wenn der Hebelarm sich vom Zapfenteil ausgehend stetig verjüngt.Another advantageous embodiment is characterized in that the lever arm has essentially the shape of an arc which extends over an angle of 180 °. It is also advantageous if the lever arm tapers continuously starting from the pin part.

Um einerseits einen stetigen Übergang vom Zapfenteil zum Hebelarm und zum anderen eine möglichst breite Auflagefläche am Ende des Hebelarms zu erzielen, sieht eine vorteilhafte Weiterbildung der Erfindung vor, daß der Hebelarm von einen im wesentlichen runden Querschnitt am Zapfenteil zu einem elliptischen Querschnitt im Bereich der äußeren Endfläche übergeht, wobei die längere Ellipsenachse vorzugsweise senkrecht zur Ebene der Mittelachsen verläuft und die Endfläche zur Bildung einer größeren Auflagefläche abgeflacht ist.In order on the one hand to achieve a constant transition from the pin part to the lever arm and on the other hand to have the largest possible contact surface at the end of the lever arm, an advantageous development of the invention provides that the lever arm has an essentially round cross section on the pin part elliptical cross section merges in the area of the outer end surface, the longer ellipse axis preferably running perpendicular to the plane of the central axes and the end surface being flattened to form a larger contact surface.

Weiter ist es zweckmäßig, wenn die Anschlagkante Bestandteil eines sich rund um das Zapfenteil erstreckenden Flansches ist. Normalerweise sollte vom Anschlag im montierten Zustand keine Kraft auf die Verbindungsstreifen ausgeübt werden, da diese Funktion der Abstützfläche am Hakenteil vorbehalten ist. Grundsätzlich könnte aber zumindest ein Teil der Abstützkraft auf der vom Hebelarm und dem Eingriffsende abgewandten Seite auch über den betreffenden Flansch auf die Verbindungsstreifen übertragen werden. Nach einer alternativen Ausführungsform könnte der dem Haktenteil zugewandte Bereich des Flansches als Abstützfläche des Hakenteils am Verbindungsstreifen dienen.It is also expedient if the stop edge is part of a flange extending around the pin part. Normally, no force should be exerted on the connecting strips from the stop when assembled, since this function is reserved for the support surface on the hook part. In principle, however, at least part of the supporting force on the side facing away from the lever arm and the engagement end could also be transmitted to the connecting strips via the relevant flange. According to an alternative embodiment, the region of the flange facing the hook part could serve as a supporting surface of the hook part on the connecting strip.

Eine gleichmäßige Verteilung der Zusammenziehkräfte kann dadurch gefördert werden, daß die zusätzliche Abstützfläche im wesentlichen auf halbem Wege zwischen der Endfläche des Hebelarms und dem Eingriffsende des Hakenteils liegt.A uniform distribution of the contraction forces can be promoted in that the additional support surface lies essentially halfway between the end surface of the lever arm and the engaging end of the hook part.

Um eine Zusammenziehung der beiden benachbarten Schaltafeln mit relativ geringen Kräften zu gewährleisten, ist es weiter zweckmäßig, wenn der durch den Hakenteil gebildete Gegenhebelarm fünf- bis fünfzehn- und insbesondere etwa zehnmal so lang ist wie der Abstand, der zwischen der Endfläche des Hebelarms und der Anschlagkante vorliegt.In order to ensure a contraction of the two adjacent formwork panels with relatively low forces, it is further expedient if the counter-lever arm formed by the hook part is five to fifteen and in particular approximately ten times as long as the distance between the end face of the lever arm and the Stop edge is present.

Um eine allseitige Zentrierung des Verbindungsgliedes während der Montage und im montierten Zustand sowie die erforderlichen Bewegungsfreiheitsgrade zu gewährleisten, ist es weiter vorteilhaft, wenn der Zapfenteil die Oberflächenform eines Ausschnitts einer Kugel mit einem Durchmesser etwa gleich dem Durchmesser des Zapfenteils aufweist.In order to ensure all-round centering of the connecting member during assembly and in the assembled state and the required degrees of freedom of movement, it is further advantageous if the pin part has the surface shape of a section of a ball with a diameter has the same diameter as the pin part.

Für eine optimale Verteilung der Kräfte sowohl in Tiefen- als auch in Längsrichtung der Verbindungsstreifen ist es weiter zweckmäßig, wenn im montierten Zustand der Winkel zwischen der Längsachse des Verstärkungsstreifens und der Ebene der Mittelachsen des Verbindungsgliedes 15 bis 45°, insbesondere 20 bis 40°, vorzugsweise 25 bis 35° und im allgemeinen etwa 30° beträgt.For an optimal distribution of the forces both in the depth and in the longitudinal direction of the connecting strips, it is further expedient if, in the assembled state, the angle between the longitudinal axis of the reinforcing strip and the plane of the central axes of the connecting member is 15 to 45 °, in particular 20 to 40 ° preferably 25 to 35 ° and generally about 30 °.

Eine weitere Ausführungsform kennzeichnet sich dadurch, daß die Abstützfläche ― im montierten Zustand ― etwas weiter in Richtung der Verstärkungsstreifen vorspringt als die Anschlagkante.Another embodiment is characterized in that the support surface - in the assembled state - projects a little further in the direction of the reinforcement strips than the stop edge.

Auf diese Weise wird erreicht, daß während des Vorgangs der Zusammenziehung der beiden benachbarten Verstärkungsstreifen zunächst ein Hebelarm zwischen der Anschlagkante und dem den zugeordneten Verstärkungsstreifen berührenden Bereich des Hebelarms gebildet, wodurch die Hebelübersetzung zunächst sehr groß ist und große Kräfte ausgeübt werden können. Im letzten Stadium der Schwenkbewegung des Hakenteils kommt dann die Abstützfläche in Eingriff mit der Oberfläche des zugeordneten Verstärkungsstreifens, wodurch der Abstützpunkt wesentlich weiter vom Hebelarm weg in Richtung des Hakenteils verlegt wird, was für Bedienungsperson das Anzeichen ist, daß nunmehr der erforderliche Zusammenziehungsgrad der beiden Schaltafeln erreicht ist und der Hakenteil in Richtung der Verstärkungsstreifen um die Achse des Zapfenteils geschwenkt werden kann, bis das Eingriffsende des Hakenteils hinter den Verstärkungsstreifen geschoben und mit diesem in Eingriff gekommen ist. Der größere Abstand der Abstützfläche von der Endfläche des Hebelarms relativ zum Abstand der Anschlagkante zur Endfläche des Hebelarms hat weiter den Vorteil, daß so größere Toleranzen der Verbindungsstreifen bzw. ihrer Relativanordnung zueinander besser ausgeglichen werden können. Bei an den Verbindungsstreifen angedrückter Abstützfläche wird der Flansch mit der Anschlagkante weitgehend entlastet und kann sogar von dem Verbindungsstreifen etwas abheben.In this way it is achieved that, during the process of contraction of the two adjacent reinforcement strips, a lever arm is first formed between the stop edge and the region of the lever arm touching the associated reinforcement strip, as a result of which the lever ratio is initially very large and large forces can be exerted. In the last stage of the pivoting movement of the hook part, the support surface then comes into engagement with the surface of the associated reinforcement strip, as a result of which the support point is moved much further away from the lever arm in the direction of the hook part, which is an indication for the operator that the required degree of contraction of the two formwork panels is now is reached and the hook part can be pivoted in the direction of the reinforcement strips around the axis of the pin part until the engaging end of the hook part has been pushed behind the reinforcement strips and has come into engagement therewith. The greater distance of the support surface from the end surface of the lever arm relative to the distance from the stop edge to the end surface of the lever arm has the further advantage that larger tolerances of the connecting strips or their Relative arrangement can be better compensated for each other. When the support surface is pressed onto the connecting strip, the flange is largely relieved of load with the stop edge and can even lift off a little from the connecting strip.

Eine weitere vorteilhafte Ausführungsform kennzeichnet sich dadurch, daß das Eingriffsende des Hakenteils im montierten Zustand in Ansicht auf die Rückseite der Verstärkungstreifen einen kleinen Winkel von vorzugsweise 3° bis 10° und insbesondere etwa 6° einschließt. Auf diese Weise können Dickentoleranzen im Bereich der aufeinanderliegenden Verstärkungsstreifen besonders gut ausgeglichen werden. Beim Herabschwenken des Hakenteils gleitet die Berührungsfläche des Eingriffsendes auf die eine Kante des Verstärkungsstreifens auf und spannt dabei das Hakenteil und den Hebelarm gegen die Verstärkungsstreifen.A further advantageous embodiment is characterized in that the engagement end of the hook part in the assembled state includes a small angle of preferably 3 ° to 10 ° and in particular approximately 6 ° in view of the rear side of the reinforcement strips. In this way, thickness tolerances in the area of the reinforcement strips lying one on top of the other can be compensated particularly well. When the hook part is swung down, the contact surface of the engagement end slides onto one edge of the reinforcing strip and in doing so tensions the hook part and the lever arm against the reinforcing strip.

Dieser selbständige Spann- und Dickenausgleichseffekt kann weiter dadurch gefördert werden, daß das Eingriffsende in einem Schnitt im wesentlichen senkrecht zu seiner Längsachse eine deutlich größere Breite als die gegenüberliegenden Bereiche des Hakenteils aufweist und die im montierten Zustand dem zugeordneten Verstärkungsstreifen zugewandte Oberfläche derart schräg ausgebildet ist, daß das Eingriffsende im montierten Zustand linienförmig bzw. entlang eines schmalen geradlinigen Streifenbereiches am zugeordneten Verstärkungsstreifen anliegt. Besonders vorteilhaft ist es hierbei, wenn die in Eingriff mit dem Verstärkungsstreifen tretende Oberfläche des Eingriffsendes im wesentlichen eben ausgebildet ist und einen Ausschnitt einer trapezgewinderartigen Schraubenfläche darstellt, deren Mittelachse mit der Mittelachse des Zapfenteils zusammenfällt.This independent tension and thickness compensation effect can be further promoted by the fact that the engagement end in a cut substantially perpendicular to its longitudinal axis has a significantly greater width than the opposite regions of the hook part and that the surface facing the associated reinforcing strip in the assembled state is designed so obliquely, that the engagement end in the assembled state is linear or along a narrow straight strip area on the associated reinforcing strip. It is particularly advantageous here if the surface of the engagement end which comes into engagement with the reinforcing strip is essentially flat and represents a section of a trapezoidal thread-like screw surface, the central axis of which coincides with the central axis of the pin part.

Aus diese Weise liegt das Eingriffsende des Hakenteils beim Heranschwenken an die Verbindungsstreifen linien- oder streifenflächenförmig auf dem rückwärtigen Rand der Verbindungsstreifen auf. Die Winkel sind dabei in jedem Flal so klein zu halten, daß im Zusammenhang mit den vorhandenen Reibungskräften eine Selbsthemmung eintritt.In this way, the engagement end of the hook part is linear or when pivoting towards the connecting strip on the rear edge of the connecting strips. The angles in each flal should be kept so small that self-locking occurs in connection with the existing frictional forces.

Besonders vorteilhaft ist es, wenn das Eingriffsende beidseits einer Mittellängsebene spiegelbildlich zueinander ausgebildete schräge Oberflächen aufweist, derart, daß eine linien-bzw. streifenförmige Verklemmung zwischen dem Eingriffsende und den Verstärkungsstreifen unabhängig davon vorgenommen werden kann, von welcher Seite aus der Hebelarm in die ausgerichteten Bohrungen eingeführt wird. Hier ist das Eingriffsende des Hakenteils in dem Sinne symmetrisch ausgebildet, daß das Verbindungsglied von beiden Seiten in die ausgerichteten Verbindungsbohrungen eingesteckt werden kann. Das erfindungsgemäße Verbindungsglied kann demnach sowohl von Rechts- als auch von Linkshändern problemlos von der einen oder der anderen Seite her in die in Deckung befindlichen Bohrungen eingesteckt und dann nach unten oder oben geschwenkt werden.It is particularly advantageous if the engagement end on both sides of a central longitudinal plane has inclined surfaces which are mirror images of one another, such that a line or. strip-shaped jamming between the engagement end and the reinforcement strips can be made regardless of the side from which the lever arm is inserted into the aligned holes. Here, the engagement end of the hook part is symmetrical in the sense that the connecting member can be inserted into the aligned connecting bores from both sides. The connecting link according to the invention can therefore be easily inserted by right-handed as well as left-handed people from one or the other side into the bores that are covered and then pivoted downwards or upwards.

Die Erfindung wird im folgenden beispielsweise anhand der Zeichnung beschrieben; in dieser zeigt:

Fig. 1
eine schematische, teilweise geschnittene Draufsicht zweier aneinander grenzender Schaltafeln mit in Ausgangsstellung befindlichem Verbindungsglied einer Schalungsvorrichtung gemäß der Erfindung,
Fig. 2
eine Rückansicht des Gegenstandes der Fig. 1, wobei jedoch das Verbindungsglied in den fertig montierten Zustand überführt ist,
Fig. 3
eine schematische Seitenansicht des Gegenstandes der Fig. 2,
Fig. 4
einen Schnitt nach Linie IV-IV in Figur 2 und
Fig. 5
eine ähnliche Ansicht wie Fig. 1, wobei jedoch die beiden Verbindungsstreifen 15, 15′ in einem geringen Abstand dargestellt sind und das Verbindungsglied bestehend aus dem Hakenteil 12, dem Zapfenteil 17 und dem Hebelarm 13 sowie der Anschlagkante 16 in eine Position verschwenkt ist, wo ein selbsthemmender Effekt gegen das Herausdrücken des Verbindungsglieds aus den Bohrungen der Verbindungsstreifen erzielt wird.

The invention is described below, for example with reference to the drawing; in this shows:
Fig. 1
2 shows a schematic, partially sectioned top view of two adjoining formwork panels with a connecting element of a formwork device according to the invention in the starting position,
Fig. 2
2 shows a rear view of the object of FIG. 1, but with the connecting link being brought into the fully assembled state,
Fig. 3
2 shows a schematic side view of the object of FIG. 2,
Fig. 4
a section along line IV-IV in Figure 2 and
Fig. 5
a view similar to Fig. 1, however, the two connecting strips 15, 15 'are shown at a short distance and the connecting member consisting of the hook part 12, the pin part 17 and the lever arm 13 and the stop edge 16 is pivoted into a position where a self-locking effect against the pushing out of the connecting member from the holes of the connecting strips is achieved.

Nach den Fig. 1 bis 3 besteht jede Schaltafel 23 aus einer vorzugsweise ebenen Schalhaut 11 von vorzugsweise rechteckiger oder quadratischer Form. An ihren Rändern sind die Schalhäute 11 mit z.B. aus Stahl bestehenden steifen Verstärkungsstreifen 15, 15′ in nicht dargestellter Weise fest verbunden. Die Verstärkungsstreifen 15 erstrecken sich somit senkrecht zu den Schalhäuten 11 und weisen über ihre gesamte Länge eine konstante Tiefe und Dicke auf. In bestimmten Abständen zweigen von den Verstärkungstreifen 15, 15′ vorzugsweise gleich tief ausgebildete steife Verstärkungsbänder 24 ab, die sich senkrecht zu dem Verstärkungsstreifen 15, 15′ und zu den Schalhäuten 11 erstrecken und ebenso wie die Verstärkungsstreifen 15, 15′ zur Verstärkung der Schalhäute 11 dienen. In den Raum 25 vor den Schalhäuten 11 wird später nach montierter Schalungsvorrichtung der flüssige Beton eingebracht.1 to 3, each formwork panel 23 consists of a preferably flat formwork skin 11, preferably of rectangular or square shape. At their edges, the formwork 11 with rigid steel reinforcement strips 15, 15 ', for example, are firmly connected in a manner not shown. The reinforcement strips 15 thus extend perpendicular to the formwork skins 11 and have a constant depth and thickness over their entire length. At certain intervals branch off from the reinforcement strips 15, 15 ', preferably of the same depth, rigid reinforcement bands 24 which extend perpendicularly to the reinforcement strips 15, 15' and to the formwork skins 11 and, like the reinforcement strips 15, 15 ', to reinforce the formwork skins 11 serve. The liquid concrete is later introduced into the space 25 in front of the formwork skins 11 after the formwork device has been installed.

In den Verstärkungsstreifen 15, 15′ ist eine Vielzahl von gleich großen, kreisförmigen und durchgehenden Verbindungsbohrungen 14, 14′ angebracht, die über die gesamte Länge der Verstärkungsstreifen 15, 15′ verteilt sind. Vorzugsweise befinden sich die Bohrungen 14 etwa bei der halben Tiefe der Verstärkungsstreifen 15, 15′, d.h. etwa auf der Mittellängsachse 21 (Fig. 3) der Verstärkungsstreifen 15.In the reinforcing strips 15, 15 'a plurality of the same size, circular and continuous connecting holes 14, 14' is attached, which are distributed over the entire length of the reinforcing strips 15, 15 '. Preferably, the holes 14 are about half the depth of the reinforcing strips 15, 15 ', i.e. approximately on the central longitudinal axis 21 (FIG. 3) of the reinforcing strips 15.

Sollen zwei Schaltafeln 23 neben- oder übereinander angeordnet werden, um eine Schalungsvorrichtung bestimmter Flächenausdehnung zu verwirklichen, so werden gemäß den Fig. 1 und 2 diese beiden Schaltafeln 23 mit ihren Rändern so aneinandergelegt, daß die dort befindlichen ebenen Verstärkungsstreifen 15, 15′ zur Anlage aneinander kommen, und zwar in der Weise, daß die dem Raum 25 zugewandten ebenen Flächen der benachbarten Schalhäute 11 miteinander fluchten und die Verankerungsbohrungen 14, 14′ der beiden aneinanderliegenden Verstärkungsstreifen 15, miteinander ausgerichtet sind.If two formwork panels 23 are to be arranged side by side or one above the other in order to implement a formwork device of a certain surface area, these two formwork panels 23 are placed with their edges according to FIGS. 1 and 2 so that the flat reinforcement strips 15, 15 'located there are in contact come together, in such a way that the flat surfaces of the adjacent formwork skins 11 facing the space 25 are aligned with one another and the anchoring holes 14, 14 'of the two adjacent reinforcing strips 15 are aligned with one another.

Das erfindungsgemäße Verbindungsglied für zwei Schaltafeln 23 besteht aus einem hakenförmig gekrümmten Hakenteil 12 mit einem freien Eingriffsende 12′ und einem eine Anschlagkante 16 aufweisenden Flansch 16, am entgegengesetzten Ende sowie einem von dem Anschlag 16 im wesentlichen senkrecht vorspringenden Zapfenteil 17 und einem daran anschließenden im gleichen Sinne wie das Hakenteil 12 gekrümmten oder geknickten Hebelarm 13, mit konkav gekrümmter Innenfläche 31.The connecting link according to the invention for two formwork panels 23 consists of a hook-shaped curved hook part 12 with a free engagement end 12 'and a flange 16 having a stop edge 16, at the opposite end and a pin part 17 projecting essentially perpendicularly and a subsequent one in the same Senses like the hook part 12 curved or kinked lever arm 13, with a concavely curved inner surface 31.

Der Zapfenteil 17 besitzt einen nur geringfügig kleineren Durchmesser als die Bohrungen 14, 14′ und ist an seinem Umfang in der aus den Fig. 1 und 2 ersichtlichen Weise leicht kugelig ausgebildet, wobei der Mittelpunkt der Kugel auf seiner Mittelachse 26 bei der Hälfte der axialen Länge des Zapfenteils 17 liegt. Die Länge des Zapfenteils 17 entspricht der Gesamtlänge zweier gemäß den Fig. 1 und 2 unmittelbar aufeinanderfolgender Bohrungen 14. Mit anderen Worten ist die Länge des Zapfenteils 17 etwa doppelt so groß wie die Dicke eines der gleich dicken Verstärkungsstreifen 15 oder 15′.The pin part 17 has a slightly smaller diameter than the holes 14, 14 'and is slightly spherical on its circumference in the manner shown in FIGS. 1 and 2, the center of the ball on its central axis 26 at half the axial Length of the pin part 17 is. The length of the pin part 17 corresponds directly to the total length of two according to FIGS. 1 and 2 successive holes 14. In other words, the length of the pin part 17 is approximately twice as large as the thickness of one of the same thickness reinforcing strips 15 or 15 '.

Der Hebelarm 13 beginnt im Bereich des vom Flansch 16′ abgewandten Endes des Zapfenteils 17 mit dem gleichen Durchmesser wie der Zapfenteil 17 an dieser Stelle und verjüngt sich dann stetig bis zu seiner Endfläche 18. Gleichzeitig ist der Hebelarm 13 bogenförmig gekrümmt, so daß er in der Seitenansicht der Fig. 1 und 2 etwa Sichelform besitzt. Der Querschnitt des Zapfenteils 17 ist am Anfang kreisförmig und ändert sich zur Enfläche 18 stetig in eine Ellipsenform (Fig. 3).The lever arm 13 begins in the region of the flange 16 'facing the end of the pin part 17 with the same diameter as the pin part 17 at this point and then tapers steadily to its end face 18. At the same time, the lever arm 13 is curved so that it is in the side view of FIGS. 1 and 2 has approximately sickle shape. The cross section of the pin part 17 is circular at the beginning and changes continuously towards the surface 18 into an elliptical shape (FIG. 3).

Der die Anschlagkante 16 tragende Flansch 16′ besitzt zum Zapfenteil 17 hin eine ebene Fläche 30, aus der sich der Zapfenteil 17 senkrecht erhebt. Auf der dem Eingriffsende 12′ zugewandten Fläche des Hakenteils 12 befindet sich in einem Abstand vom Flansch 16′ eine ebene Abstützfläche 20, die in Richtung des Zapfenteils 17 etwas weiter vorspringt als die ebene Fläche 30 des Flansches 16′.The flange 16 carrying the stop edge 16 'has a flat surface 30 towards the pin part 17, from which the pin part 17 rises vertically. On the engaging end 12 'facing surface of the hook part 12 is at a distance from the flange 16' a flat support surface 20 which protrudes slightly further in the direction of the pin part 17 than the flat surface 30 of the flange 16 '.

Erfindungsgemäß verläuft der Hakenteil 12 - ausgehend vom Flansch 16′ - zunächst etwa bis zur Höhe der Abstützfläche 20 im wesentlichen senkrecht zur Achse 26 des Zapfenteils 17, um dann etwas in Richtung von dem Hebelarm 13 weg abzuknicken. Auf diese Weise entsteht im montierten Zustand gemäß Fig. 2 zwischen den vom Flansch 16 etwas weiter entfernten Bereichen des Hakenteils 12 und den Verstärkungsstreifen 15 ein deutlicher, zunächst zunehmender und dann wieder abnehmender Abstand 19.According to the invention, the hook part 12 - starting from the flange 16 '- initially approximately up to the height of the support surface 20 substantially perpendicular to the axis 26 of the pin part 17, to then bend slightly in the direction away from the lever arm 13. In this way, in the assembled state according to FIG. 2, a clear, initially increasing and then decreasing distance 19 is created between the regions of the hook part 12 which are somewhat further away from the flange 16 and the reinforcing strips 15.

Die Mittelachse 27 des Hakenteils 12, die Mittelachse 26 des Zapfenteils 17 und die Mittelachse 28 des Hebelarms 13 liegen gemäß Fig. 1 vorzugsweise in einer Ebene, in der auch die Längsachse 22 des erfindungsgemäßen Verbindungsgliedes 12, 13, 16, 17 gemäß der Ansicht der Fig. 3 liegt.The central axis 27 of the hook part 12, the central axis 26 of the pin part 17 and the central axis 28 of the lever arm 13 1 preferably lie in a plane in which the longitudinal axis 22 of the connecting element 12, 13, 16, 17 according to the invention also lies according to the view in FIG. 3.

Die Montage einer Schalungsvorrichtung mit dem erfindungsgemäßen Verbindungsglied geht wie folgt vor sich:The assembly of a formwork device with the connecting element according to the invention proceeds as follows:

Zunächst werden die beiden zu verbinden Schaltafeln 23 gemäß den Fig. 1 und 2 nebeneinandergestellt, bis zwei Halterungsbohrungen 14 jeweils in Ausrichtung miteinander sind. Alsdann wird das Verbindungsglied in der aus Fig. 1 ersichtlichen Weise von der Seite her mit dem Hebelarm 13 voran in die ausgerichteten Bohrungen 14, 14′ eingeführt. Dabei liegt die mit der Längsachse 22 zusammenfallende Ebene 26, 27, 28 im wesentlichen senkrecht zu den Ebenen de Verbindungsstreifen 15. Es kommt dabei darauf an, daß die Bohrungen 14, 14′ von den Rückflächen der Schalhäute 11 einen solchen Abstand haben, daß für das Hakenteil 12 und den Flansch 16′ ausreichend Platz zur Verfügung steht, um den sich verjüngenden gekrümmten Hebelarm 13 in die Bohrungen 14, 14′ in der aus Fig. 1 ersichtlichen Weise einzuführen. Anschließend wird dann das Verbindungsglied entsprechend dem Pfeil F in Fig. 1 um eine im wesentlichen auf der Zeichnungsebene der Fig. 1 stehende Achse verschwenkt, wobei der Zapfenteil 17 gemäß Fig. 5 in die miteinander ausgerichteten Bohrungen 14, 14′ eindringt und der sichelartige Hebelarm 13 um die in Fig. 1 rechte Oberkante 29 der Bohrung 14′ herumgleitet, bis der Zapfenteil 17 weitgehend in die Bohrungen 14, 14′ eingetreten ist und die elliptische Endfläche 18 des sichelartig gekrümmten Hebelarms 13 zur Anlage an dem in Fig. 1 rechten Verstärkungsstreifen 15′ kommt. Gleichzeitig legt sich das in Fig. 1 obere Ende des Flansches 16′, nämlich die Anschlagkante 16, an den anderen Verstärkungsstreifen 15 an. Nunmehr werden bei weiterem Schwenken des Verbindungsgliedes die beiden Verbindungsstreifen 15, 15′, da sie zwischen der Anschlagkante 16 und zunächst der konkaven Innenfläche 31 und dann der Endfläche 18 eingeklemmt sind, bei weiterem Schwenken des Verbindungsgliedes mit großem Hebelarmverhältnis gegeneinander gezogen, bis schließlich die Abstützfläche 20 in der aus Fig. 2 ersichtlichen Weise am zugeordneten Verstärkungsstreifen 15 anliegt.First, the two formwork panels 23 to be connected according to FIGS. 1 and 2 are placed side by side until two mounting holes 14 are in alignment with one another. Then the connecting member is inserted in the manner shown in FIG. 1 from the side with the lever arm 13 ahead into the aligned bores 14, 14 '. The coinciding with the longitudinal axis 22 plane 26, 27, 28 is substantially perpendicular to the planes de connecting strips 15. It is important that the holes 14, 14 'from the rear surfaces of the formwork 11 have such a distance that for the hook part 12 and the flange 16 'sufficient space is available to introduce the tapered curved lever arm 13 into the holes 14, 14' in the manner shown in Fig. 1. Then the connecting member is pivoted according to the arrow F in Fig. 1 about a substantially on the drawing plane of FIG. 1 axis, the pin part 17 of FIG. 5 penetrates into the aligned holes 14, 14 'and the sickle-like lever arm 13 around the top edge 29 in FIG. 1 of the bore 14 'slides until the pin part 17 has largely entered the bores 14, 14' and the elliptical end face 18 of the crescent-shaped lever arm 13 for contact with the reinforcement strip on the right in FIG. 1 15 ′ comes. At the same time, the upper end of the flange 16 'in FIG. 1, namely the stop edge 16, bears against the other reinforcing strips 15. Now, with further pivoting of the connecting link, the two connecting strips 15, 15 ', since they are between the Stop edge 16 and first the concave inner surface 31 and then the end surface 18 are clamped, pulled against each other with further pivoting of the connecting member with a large lever arm ratio, until finally the support surface 20 rests in the manner shown in FIG. 2 on the associated reinforcing strip 15.

Im gleichen Augenblick kommt die innere Fläche des Eingriffsende 12′ des Hakenteils 12 annähernd in Ausrichtung mit dem gleichen Verstärkungsstreifen 15′, an dem diese Endfläche 18 anliegt. Wird nunmehr das Verbindungsglied 12, 13, 17 um die Achse 26 in Fig. 2 nach unten geschwenkt, so greift das Eingriffsende 12′ des Hakenteils 12 hinter den in Fig. 2 rechten Verstärkungsstreifen 15′ und kommt mit diesem in klemmenden Eingriff. Dieser Schwenkvorgang kann durch Schlagen mittels eines Hammers auf das Hakenteil 12 unterstützt werden. Die Schwenkung geht dann so lange vor sich, bis der untere Steg 12˝ des Hakenteils 12 zur Anlage an den rückwärtigen Kanten der Verstärkungsstreifen 15, 15′ kommt. Dieser Endzustand ist in den Fig. 2 und 3 dargestellt.At the same time, the inner surface of the engaging end 12 'of the hook part 12 comes approximately in alignment with the same reinforcing strip 15' on which this end surface 18 abuts. If the connecting member 12, 13, 17 is now pivoted downward about the axis 26 in FIG. 2, the engaging end 12 'of the hook part 12 engages behind the reinforcing strip 15' on the right in FIG. 2 and comes into clamping engagement therewith. This pivoting process can be supported by hitting the hook part 12 with a hammer. The pivoting then continues until the lower web 12˝ of the hook part 12 comes to rest on the rear edges of the reinforcing strips 15, 15 '. This final state is shown in FIGS. 2 and 3.

Das Verbindungsglied befindet sich jetzt an der Endfläche 18, an der Abstützfläche 20 und schließlich an der in Fig. 3 angedeuteten Stelle 40 des Eingriffsendes 12′ in klemmender Verbindung mit den Oberflächen der Verstärkungsstreifen 15, 15′. Die Klemmkräfte K1, K2 und K3 sind in Fig. 2 schematisch angedeutet. Sie wirken abwechselnd von entgegengesetzten Seiten auf die Verstärkungsstreifen 15, 15′.The connecting member is now on the end surface 18, on the support surface 20 and finally at the location 40 indicated in Fig. 3 of the engagement end 12 'in clamping connection with the surfaces of the reinforcing strips 15, 15'. The clamping forces K1, K2 and K3 are indicated schematically in FIG. 2. They act alternately from opposite sides on the reinforcement strips 15, 15 '.

Aufgrund der durch diese Klemmkräfte hervorgerufenen Reibungskräfte sitzt das erfindungsgemäße Verbindungsglied nunmehr unverrückbar in der aus den Fig. 2 und 3 ersichtlichen endmontierten Stellung.Due to the frictional forces caused by these clamping forces, the connecting link according to the invention now sits immovably in the final assembled position shown in FIGS. 2 and 3.

Entsprechende Verbindungsglieder können nun in gewünschten Abständen in weiteren Paaren von Halterungsbohrungen 14, 14′ nach Wunsch angeordnet werden, um eine biegesteife Verbindung aller miteinander zu verbindenden Schaltafeln 23 zu erreichen.Corresponding connecting links can now be arranged at desired intervals in further pairs of mounting holes 14, 14 'as desired, in order to achieve a rigid connection of all formwork panels 23 to be connected to one another.

Zum Lösen braucht auf den hinten über die Verstärkungsstreifen 15 überstehenden Teil des Verbindungsgliedes lediglich eine Kraft in Richtung des Pfeiles H in Fig. 3 ausgeübt zu werden, um die Klemmverbindungen zu lösen und das Verbindungsglied nach oben aus seiner Eingriffslage zu verschwenken. Anschließend kann dann das Verbindungsglied zwanglos in die aus Fig. 1 ersichtliche Lage zurückgeschwenkt und von den Schaltafeln in umgekehrtem Sinne zur weiteren Verwendung abgenommen werden.To release the part of the connecting member projecting beyond the reinforcing strips 15 at the rear, only a force in the direction of the arrow H in FIG. 3 needs to be exerted in order to release the clamping connections and to pivot the connecting member upward out of its engagement position. The connecting member can then be swung back into the position shown in FIG. 1 and removed from the formwork panels in the opposite direction for further use.

Aufgrund der erfindungsgemäßen Ausbildung läßt sich also das Verbindungsglied auch sehr leicht wieder von den Schaltafeln abnehmen, da allenfalls leichte Hammerschläge lediglich im wesentlichen in Längsrichtung der Verstärkungsstreifen 15 und nicht senkrecht zu ihren Flächen ausgeübt werden müssen. In letzterem Fall könnte es zu einem federnden Nachgeben beim Schlagen kommen, wodurch das Lösen erschwert würde.Because of the design according to the invention, the connecting member can also be removed very easily from the formwork panels, since at most light hammer blows only have to be exerted essentially in the longitudinal direction of the reinforcing strips 15 and not perpendicular to their surfaces. In the latter case, there could be a resilient yield when hitting, which would make loosening difficult.

In Fig. 5 ist das Hakenteil 12 in einer Zwischenposition zwischen der gestrichelt dargestellten Ausgangslage und der Endposition nach den Fig. 2 und 3 dargestellt.5, the hook part 12 is shown in an intermediate position between the starting position shown in dashed lines and the end position according to FIGS. 2 and 3.

Beim weiteren Einschwenken des Hakenteils 12 über die in Fig. 5 dargestellte Positon hinaus drücken die Endfläche 18 und die Anschlagkante 16 die beiden Verbindungsstreifen 15, 15′ gegeneinander, so daß schließlich der zunächst noch zwischen ihnen vorhandene Spalte verschwindet. Das Zusammendrücken der Verbindungsstreifen 15, 15′ kann auch dadurch erfolgen, daß bei einer etwas anderen Dimensionierung und Formgebung die konkave Innenfläche 31 des Hebelarms 13 an der Oberkante 29 der rechten Bohrung 14′ in Fig. 5 englanggleitet, während dann die Endfläche 18 erst in einem späteren Stadium des Schwenkvorganges mit dem rechten Verbindungsstreifen 15′ in Eingriff kommt. Diese Ausführungsform ist bevorzugt, weil hierdurch noch größere Zusammenziehungskräfte auf die Verbindungsstreifen 15, 15′ ausgeübt werden können.Upon further swiveling the hook part 12 beyond the position shown in FIG. 5, the end face 18 and the stop edge 16 press the two connecting strips 15, 15 'against one another, so that the gap which initially still exists between them finally disappears. The compression of the connecting strips 15, 15 'can also be done that with a slightly different dimensioning and shape, the concave inner surface 31 of the lever arm 13 on the upper edge 29 of the right bore 14 'in Fig. 5 Englang glides, while then the end surface 18 only in a later stage of the pivoting process with the right connecting strip 15' in engagement is coming. This embodiment is preferred because even greater contraction forces can thereby be exerted on the connecting strips 15, 15 '.

Das Besondere der Ausführungsform nach Fig. 5 besteht darin, daß beim Hochschwenken aus der Montageposition (Fig. 2, 3) heraus und anschließende geringfügige Verschwenkung in die Lage nach Fig. 5 die Anlagestelle der Anschlagkante 16 am Verbindungsstreifen 15 gegenüber der Berührungsstelle 35 der Endfläche 18 am Verbindungsstreifen 15′ in einer Richtung senkrecht zur Ebene der Schalhäute 11 so gegeneinander versetzt sind, daß sie auf einer in Fig. 5 strichpunktiert dargestellten Linie 36 liegen. Werden nun die beiden Verbindungsstreifen 15, 15′ durch sie auseinander zu bewegen suchende Kräfte 32, 33 beaufschlaft, die senkrecht auf den Verbindungsstreifen 15, 15′ stehen, so wird hierdurch über die Berührungsstelle der Anschlagkante 16 am Verbindungsstreifen 15 und die Berührungsstelle 35 an dem Verbindungsstreifen 15′ ein Moment erzeugt, welches das Hakenteil 12 in Richtung des Pfeiles F zu verschwenken sucht. In der Position nach Fig. 5 liegt also eine Selbsthemmung des Verbindungsgliedes in dem Sinne vor, daß es nicht von selbst aus der dargestellten Lage herausfallen kann, wenn Kräfte im Sinne der Pfeile 32, 33 zwischen den Schaltafeln 23 wirksam sind. Selbst wenn also das Verbindungsglied noch nicht durch Herunterschwenken in die Position der Fig. 2, 3 gesichert ist, besteht keine Gefahr eines ungewollten Herausdrückens des Zapfenteils 17 aus den Bohrungen 14, 14′.5 is that when swiveling up from the mounting position (Fig. 2, 3) and then slightly pivoting into the position shown in FIG. 5, the abutment of the stop edge 16 on the connecting strip 15 relative to the contact point 35 of the end face 18 on the connecting strip 15 'in a direction perpendicular to the plane of the formwork 11 are offset from each other so that they lie on a line 36 shown in phantom in Fig. 5. If the two connecting strips 15, 15 'are strained by forces 32, 33 which are to be moved apart and are perpendicular to the connecting strips 15, 15', this will result in the contact point of the stop edge 16 on the connecting strip 15 and the contact point 35 on the Connecting strips 15 'generates a moment which the hook part 12 tries to pivot in the direction of arrow F. 5 there is therefore a self-locking of the connecting member in the sense that it cannot fall out of the position shown by itself if forces in the sense of arrows 32, 33 between the formwork panels 23 are effective. So even if the link is not yet secured by pivoting down into the position of Fig. 2, 3, there is no risk of unwanted pressing out of the pin part 17 from the holes 14, 14 '.

Von besonderer Bedeutung ist es, daß die mit den Verstärkungsstreifen 15, 15′ nach Figur 2 in Eingriff kommende Oberfläche 42 des Eingriffsendes 12′ des Hakenteils in dem montierten Zustand nach Figur 2 von der Rückseite her gesehen einen relativ kleinen Winkel β mit der Längsrichtung der Verstärkungsstreifen 15, 15′ einschließt. Auf diese Weise wird beim Herunterschwenken des Hakenteils 12 ein gewisser Keileffekt erzielt, der auch bei Dickenschwankungen der Verstärkungsstreifen 15, 15′ bzw. bei Abstandsschwankungen ein festes Verklemmen des Hakenteils 12 auf den gegeneinandergezogenen Verstärkungsstreifen 15, 15′ gewährleistet.It is of particular importance that the surface 42 of the engaging end 12 'of the hook part, which comes into engagement with the reinforcing strips 15, 15' according to FIG. 2, in the assembled state according to FIG Reinforcement strips 15, 15 'includes. In this way, a certain wedge effect is achieved when swiveling down the hook part 12, which ensures a firm jamming of the hook part 12 on the mutually drawn reinforcing strips 15, 15 'even with fluctuations in the thickness of the reinforcement strips 15, 15'.

Figur 4 zeigt einen senkrecht zur Längsachse 41 des Eingriffsendes 12′ geführten Schnitt nach Linie IV-IV in Figur 2. Nach Figur 4 ist die mit den Verstärkungsstreifen 15 in Eingriff kommende Oberfläche 42 des Eingriffsendes 12′ ebenfalls schräg ausgebildet, um in Zusammenwirkung mit der schrägen Anordnung dieser Fläche nach Figur 2 eine linienförmige oder streifenförmige Berührungsfläche zwischen der rückwärtigen Kante des Verstärkungsstreifens 15′ und dem Eingriffsende 12′ zu erzielen.Figure 4 shows a section perpendicular to the longitudinal axis 41 of the engaging end 12 'along line IV-IV in Figure 2. According to Figure 4, the surface 42 of the engaging end 12' engaging with the reinforcing strips 15 'is also formed obliquely to in cooperation with the oblique arrangement of this surface according to Figure 2 to achieve a linear or strip-shaped contact surface between the rear edge of the reinforcing strip 15 'and the engagement end 12'.

Nach Fig. 4 sind symmetrisch zur Mittellängsebene 34 des Eingriffsendes 12′ zwei schräg verlaufende Oberflächen 42, 42′ vorgesehen, von denen die eine (42) in der aus Fig. 2 ersichtlichen Position mit dem Verstärkungsstreifen 15′ in Eingriff kommt, die andere dagegen, wenn das Verbindungsglied in einer gegenüber Fig. 2 um 180° versetzten Position angeordnet wird. Aus diesem Grunde besteht hinsichtlich der Anordnung des Verbindungsgliedes eine Zahl von Variationsmöglichkeiten. Es kann nach dem Einsetzen gemäß den Fig. 1 und 5 je nach den Platzverhältnissen nach oben oder unten verschwenkt werden. Es kann außerdem von links oder rechts in die ausgerichteten Bohrungen 14, 14′ eingesetzt werden.4 are symmetrical to the central longitudinal plane 34 of the engaging end 12 'two inclined surfaces 42, 42' are provided, of which one (42) in the position shown in Fig. 2 with the reinforcing strip 15 'comes into engagement, the other against when the connecting member is arranged in a position offset by 180 ° with respect to FIG. 2. For this reason, there are a number of possible variations with regard to the arrangement of the connecting link. After insertion according to FIGS. 1 and 5, it can be pivoted up or down depending on the space available. It can also be used from the left or right in the aligned holes 14, 14 '.

Die erfindungsgemäße Ausbildung des Hakenteils 12, des Zapfenteils 17 und des Hebelarms 13 hat weiter den Vorteil, daß eine Selbsthemmung auch dann eintritt, wenn das Hakenteil 12 sich noch nicht in Eingriff mit den Verstärkungsstreifen 15 befindet (Fig. 5). Dies ist insbesondere auf die erfindungsgemäße Ausbildung der Anschlagkante 16 sowie der Endfläche 18 zurückzuführen. Der Vorteil ist eine größere Sicherheit gegen ein versehentliches Lösen des Verbindungsgliedes.The inventive design of the hook part 12, the pin part 17 and the lever arm 13 has the further advantage that self-locking occurs even when the hook part 12 is not yet in engagement with the reinforcing strips 15 (Fig. 5). This is particularly due to the inventive design of the stop edge 16 and the end surface 18. The advantage is greater security against accidental loosening of the connecting link.

Dickentoleranzen können aufgrund der keilförmigen Oberfläche 42, 42′ problemlos ausgeglichen werden; insbesondere erfolgt beim Herabschwenken des Hakenteils 12 eine gleichförmig zunehmende Spannung zwischen dem Verbindungsglied und den Verstärkungsstreifen 15, 15′.Thickness tolerances can be easily compensated for due to the wedge-shaped surface 42, 42 '; in particular, when swinging down the hook part 12 there is a uniformly increasing tension between the connecting member and the reinforcing strips 15, 15 '.

Claims (10)

1. Shuttering apparatus having at least two shuttering panels (23) which respectively comprise a shuttering skin (11) and reinforcement strips (15, 15′) which are disposed at at least some of the edges of the shuttering panels, which project substantially perpendicular to their rear sides and which have a plurality of connection bores (14, 14′); and at least one connection member (12, 13, 17) for two adjacent shuttering panels (23), with the connection member having a spigot part (17) which can be passed through two mutually aligned bores (14, 14′) of two directly contacting reinforcement strips (15, 15′) and a hook part (12) which branches off from the one end of the spigot part, and which can be brought, when the spigot part (17) is inserted, by pivoting of the hook part (12) into engagement with that reinforcement strip (15, 15′) which faces away from the connection plane (30) between the spigot (17) and the hook (12) part, characterised in that the spigot part (17) only has a length substantially the same as the thickness of the two reinforcement strips (15, 15′) through which it passes, is restrictedly pivotable in the bores which it traverses about an axis perpendicular to the plane formed by its central longitudinal axis (26) and that (27) of the hook part (12), and also passes at the end remote from the connection plane (30) with the hook part (12) into a curved and/or kinked lever arm (13) which is remote from the hook part (12) and of smaller cross-section than the bores (14, 14′), with the lever arm being insertable through the two substantially aligned bores (14, 14′) from one side of one of the reinforcement strips (15) until the spigot part (17) is located inside the bores (14, 14′) and the outer end surface (18) of the lever arm (13) remote from the hook part (12) contacts the other reinforcement strip (15′); in that the hook part (12) has a support surface (20) at the side of the spigot part (17) remote from the lever arm (13) and facing opposite to the connection strip (15) provided at the connection plane (30), with the support surface (20) coming into contact in the installed state with the reinforcement strip (15) disposed at the connection plane (30) when the spigot part (17) is inserted into the bores (14, 14′); and in that, when the engagement end (12′) of the hook part (12) is in engagement with the associated reinforcement strip (15′), the support surface (20) is clamped against the contacting reinforcement strip (15) on the side opposite to the engagement end (12′), and the end surface (18′) of the lever arm (13) is clamped against the contacting reinforcement strips (15) from the same side as the engagement end (12′).
2. Shuttering apparatus in accordance with claim 1, characterised in that the connection member has an abutment edge (16), preferably a rounded abutment edge, at the side of the spigot part (17) remote from the hook part (12) and substantially in alignment with the connection plane (30) between the hook part (12) and the spigot part (17), with the abutment edge contacting the reinforcement strip (15) facing the insertion side during introduction of the spigot part (17) into the aligned bores (14, 14′); in that the lever arm (13) has a cross-section which reduces in the direction away from the spigot part (17) and can be passed through the two substantially mutually aligned bores (14, 14′) of the at least closely adjacent reinforcement strips (15, 15′) until the abutment edge (16) contacts the reinforcement strip remote from the lever arm (13) whereupon, by the action of force on the hook part (12), which has not yet engaged with the reinforcement strip (15′), in the sense of generating a torque about the contact point of the abutment edge (30) on the reinforcement strip (15), the correspondingly constructed concave inner surface (31) of the lever arm (13) is guided along the edge (29) facing the shuttering skin (11) of the bore (14) remote from the introduction side or, if the reinforcement strips (15) have not yet fully contacted one another, is pressed against the edge (29) and is pushed slidingly over the edge (29) to draw together the reinforcement strips (15, 15′) which are not yet fully in contact, until the spigot part (17) is located inside the bores (14, 14′) and the outer end surface of the lever arm (13) remote from the hook part (12) comes into contact with the reinforcement strip (15′) remote from the connection plane (30), and also until the support surface (20) comes into contact with the associated connection strip (15), whereupon the engagement end (12') of the hook part (12) is pivoted into engagement with the associated connection strip (15′), the concave inner surface (31) of the lever arm (13) being in particular so curved in a direction perpendicular to the central axes (26, 27, 28) that it has a contact line or surface with the edge (29) of the hole which is as large as possible on contact with the edge (29) of the hole.
3. Shuttering apparatus in accordance with claim 2, characterised in that the concave inner surface (31) of the lever arm (13) is so curved that it can also enter into engagement with the edge (29) of the hole on introducing the lever arm into the aligned bores (14, 14′) even when the reinforcement strips (15, 15′) do not fully contact one another; and in that on pivoting the spigot part (17) into the aligned bores (14, 14′) the concave inner surface (31) exerts, with the abutment edge (16) being braced against the other reinforcement strip (15), an increasing clamping force on the associated reinforcement strip (15′) in the sense such that the two reinforcement strips (15, 15′) are drawn firmly against one another.
4. Shuttering apparatus in accordance with one of claims 2 or 3, characterised in that the abutment edge (16) and the end surface (18) of the lever arm (13) are so displaced relative to one another in the plane of the central axes (26, 27, 28) that a moment which biases the connection member (12) into its engaged position is achieved by the forces (32, 33) which are trying to separate the two reinforcement strips (15, 15′) which are to be connected, said moment being achieved when the connection member (27) is already located in an engagement position which holds the connection strips (15, 15′) together and which is no longer far removed from its position in the finally installed state.
5. Shuttering apparatus in accordance with one of the preceding claims, characterised in that the hook part (12) has a substantial spacing (19) from the next closest reinforcement strip (15) in the installed state ― other than in the region of the support surface (20) ― at the side of the reinforcement strips (15, 15′) remote from its engagement end (12′); and/or in that the lever arm (13) has essentially the shape of an arc which extends over an angle of approximately 180°; and/or in that the lever arm (13) tapers continuously starting from the spigot part (17).
6. Shuttering apparatus in accordance with one of the preceding claims, characterised in that the lever arm (13) merges from a substantially round cross-section at the spigot part (17) to an elliptical cross-section in the region of the outer end surface (18), with the longer axis of the ellipse preferably extending perpendicular to the plane of the central axes (26, 27, 28), and with the end surface (18) being expediently flattened in order to form a larger contact surface.
7. Shuttering apparatus in accordance with one of claims 2 to 6, characterised in that the abutment edge (16) is an element of a flange (16′) which extends around the spigot part (17); and/or in that the additional support surface (20) lies substantially at the half distance between the end surface (18) of the lever arm (13) and the engagement end (12′) of the hook part (12); and/or in that the lever counterarm formed by the hook part (12) is 5 to 15 and in particular approximately 10 times as long as the distance which is present between the end surface (18) of the lever arm (13) and the abutment edge (16); and/or in that the spigot part (17) has the surface shape of a portion of a ball with a diameter approximately the same as the diameter of the connecting bores (14, 14′).
8. Shuttering apparatus in accordance with one of the preceding claims, characterised in that in the installed state the angle (α) between the longitudinal axis (21) of the reinforcement strips (15, 15′) and the plane (22) of the central axes (26, 27, 28) of the connection member amounts to 15 to 45°, in particular to 20 to 40°, preferably to 25 to 35° and generally to approximately 30°; and/or in that the support surface (20) projects ― in the installed statesome-what further in the direction of the reinforcement strips (15, 15′) than the abutment edge (16).
9. Shuttering apparatus in accordance with one of claims 2 to 8, characterised in that the engagement end (12′) of the hook part (12) includes, in the installed state, when viewed towards the rear side of the reinforcement strips (15) a small angle (β) of preferably 3 to 10 and in particular 4 to 8° (Fig. 2).
10. Shuttering apparatus in accordance with one of the preceding claims, characterised in that the engagement end (12′) has substantially greater width in a section substantially perpendicular to its longitudinal axis (41) than the oppositely disposed regions of the hook part (12) and in that the surface (42) which in the installed state (Fig. 2) faces the associated reinforcement strip (15′) is obliquely shaped in such a way that the engagement end (12′) contacts the associated reinforcement strip (15′) in the installed state linearly or along a narrow straight strip region, the surface (42) of the engagement end (12') which enters into engagement with the reinforcement strip (15') being in particular of substantially flat shape and representing a section through a trapezoidal thread-like screw surface, the central axis of which coincides with the central axis (26) of the spigot part (17); and/or the engagement end (12′) preferably having inclined surfaces (42, 42′) which are constructed in mirror-like manner relative to one another on both sides of its central longitudinal plane (34) in such a way that a linear or strip-like clamping can be effected between the engagement end (12′) and the reinforcement strip (15, 15′) irrespective of the side from which the lever arm (13) is introduced into the aligned bores (14, 14′).
EP88119359A 1987-11-23 1988-11-21 Formwork system Expired - Lifetime EP0317938B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88119359T ATE65283T1 (en) 1987-11-23 1988-11-21 FORMWORK DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3739633 1987-11-23
DE19873739633 DE3739633A1 (en) 1987-11-23 1987-11-23 FORMWORK DEVICE

Publications (2)

Publication Number Publication Date
EP0317938A1 EP0317938A1 (en) 1989-05-31
EP0317938B1 true EP0317938B1 (en) 1991-07-17

Family

ID=6341050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88119359A Expired - Lifetime EP0317938B1 (en) 1987-11-23 1988-11-21 Formwork system

Country Status (5)

Country Link
US (1) US4886234A (en)
EP (1) EP0317938B1 (en)
AT (1) ATE65283T1 (en)
DE (2) DE3739633A1 (en)
ES (1) ES2023246B3 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP4033051B1 (en) * 2021-01-22 2023-06-07 ULMA C y E, S. COOP. Formwork assembly for a vertical formwork

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US5471804A (en) * 1988-11-21 1995-12-05 Winter, Iv; Amos G. Building system using prefabricated building panels and fastening components used therewith
CA2006575C (en) * 1989-12-22 1993-06-22 Vittorio Spera Prefabricated assembly for poured concrete forming structures
DE4243216A1 (en) * 1992-12-19 1994-06-23 Mueller Siegfried Dipl Archite Wedge connection
US6530553B1 (en) 1999-09-20 2003-03-11 Philip A. Diorio Method and apparatus for making concrete buildings
DE19945997B4 (en) * 1999-09-24 2004-04-29 Peri Gmbh Device for connecting formwork elements
US20050005575A1 (en) * 2003-07-09 2005-01-13 Durand Forms Incorporated Concrete forming system
DE10348852A1 (en) * 2003-10-21 2005-06-02 Peri Gmbh formwork system
US20060255236A1 (en) * 2005-05-11 2006-11-16 Shidler David C Waler clamp
DE102013107303B4 (en) 2013-07-10 2024-06-06 Polytech Gmbh Formwork panel for concreting formwork
CN112809885A (en) * 2020-12-31 2021-05-18 重庆聚融建设（集团）股份有限公司 Lock catch convenient to separate quickly

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US1636256A (en) * 1923-07-23 1927-07-19 Peter D Johnston Poured-wall form
US2693628A (en) * 1952-04-21 1954-11-09 Robert R Anderson Co Locking device for concrete forms
DE1148730B (en) * 1955-09-20 1963-05-16 Acrow Eng Ltd Clamp that can be tightened with a screw for connecting and aligning formwork panels
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4033051B1 (en) * 2021-01-22 2023-06-07 ULMA C y E, S. COOP. Formwork assembly for a vertical formwork

Also Published As

Publication number Publication date
US4886234A (en) 1989-12-12
DE3863755D1 (en) 1991-08-22
DE3739633C2 (en) 1991-02-07
EP0317938A1 (en) 1989-05-31
ATE65283T1 (en) 1991-08-15
DE3739633A1 (en) 1989-06-01
ES2023246B3 (en) 1992-01-01

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