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EP1544380B1 - Spacing tube for the insertion of tensioning rods - Google Patents

Spacing tube for the insertion of tensioning rods Download PDF

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Publication number
EP1544380B1
EP1544380B1 EP20040405748 EP04405748A EP1544380B1 EP 1544380 B1 EP1544380 B1 EP 1544380B1 EP 20040405748 EP20040405748 EP 20040405748 EP 04405748 A EP04405748 A EP 04405748A EP 1544380 B1 EP1544380 B1 EP 1544380B1
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EP
European Patent Office
Prior art keywords
guide tube
end piece
end pieces
tube
spacing
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.)
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Application number
EP20040405748
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German (de)
French (fr)
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EP1544380A2 (en
EP1544380A3 (en
Inventor
Giulio Albanese
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System Albanese
Original Assignee
System Albanese
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Publication date
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Priority to EP05003614A priority Critical patent/EP1550781A3/en
Publication of EP1544380A2 publication Critical patent/EP1544380A2/en
Publication of EP1544380A3 publication Critical patent/EP1544380A3/en
Application granted granted Critical
Publication of EP1544380B1 publication Critical patent/EP1544380B1/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
    • E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties

Definitions

  • the invention relates to a spacer tube for guiding tension rods according to the preamble of patent claim 1.
  • the formwork panels which form the outer boundary when casting concrete structures, must on the one hand be at a fixed distance from each other, which determines the thickness of the wall. On the other hand, the formwork panels must withstand the static pressure of the filled liquid concrete mass. For this purpose, it is known to insert tubular spacers or pipes between the formwork panels, which make it possible to pass through the pipe interior and corresponding holes in the formwork panels a tension rod. On the two ends of the tie rod screws are placed, with which the two formwork panels against the spacer tube or on the ends of the spacer tube patch mostly conical end pieces can be pressed. When constructing exposed concrete walls, it is necessary to remove the end pieces that come to rest on the surface of the wall after curing of the concrete.
  • the end pieces are frusto-conical and formed plugged into the cylindrical guide tube.
  • Such an arrangement is in DE 9314656 U1 described. So that no liquid concrete mass penetrate into the interior of the guide tube and there can permanently connect the inserted tension rod with the tube, the insertion of the end pieces must rest both very full on the guide tube and on the formwork. This causes on the one hand probably a good seal against penetrating concrete water and on the other hand, that the end pieces are difficult to liberate after completion of the wall of the latter and the tube with great effort and without causing damage to the end pieces surrounding and later still visible wall surface.
  • This consists of a cylindrical tube, in which a conical investment piece is inserted at both ends and held there by suitable locking means in the inserted position.
  • the conical abutment pieces can after the completion of the wall, i. after concreting and hardening, only with great difficulty be removed from the cylindrical tubes remaining in the concrete. It is necessary to overcome the resistance of the hook-shaped rib in addition to the rather intense connection with the concrete.
  • the invention is an object of the invention to develop a spacer tube for the creation of exposed concrete walls, on the one hand prevents penetration of the liquid concrete mass in the guide rod surrounding gap in the guide tube and on the other hand ensures easy detachment of the end pieces of the wall surface.
  • the one- or two-part design of the spacer tube with the end pieces proves to be advantageous because lower costs incurred in the production, less material (plastic) is required for the production of the spacer tube and the detachment of the end pieces on the finished wall with little or no Effort is possible.
  • a non-rotationally symmetrical design of the conical surface of the end pieces can be replaced by a rotation with little effort from the end of the guide tube and the wall or break away.
  • An inclination of a predetermined breaking line with respect to a plane perpendicular to the longitudinal axis of the spacer tube level between the guide tube and the tail causes a helical and thus an axial displacement of the end piece when the latter is set in rotation.
  • the surface of the tail of the concrete mass and the tail of the pipe dissolves, without having to be asymmetrical.
  • the penetration of liquid concrete mass in the predetermined breaking area, the end pieces and the skin connecting skin is separated.
  • the end pieces solve when clamping the formwork from the spacer tube without leaking.
  • the end pieces can later be pulled out of the finished wall or detach themselves. With a molded onto the end face of the tail gripping tab, the tail can be subtracted from the guide tube or twisted with respect to the latter and so detached from the guide tube.
  • Reference numeral 1 designates a spacer tube known from the prior art, comprising a substantially cylindrically shaped guide tube 3 and two end pieces 5 arranged at the front ends of the guide tube 3.
  • the end pieces 5 are in accordance with this known spacer tube 1 FIG. 1 inserted into the guide tube 3. They include for this purpose, in addition to the conical jacket 7, which comes to rest outside the guide tube 3, a cylindrical portion 9.
  • the two end pieces 5 are inserted before insertion between two formwork panels 11 in the guide tube 3.
  • the merging of the end pieces 5 with the guide tube 3 can be done at the manufacturer or on the site. Usually, this assembly work is done on site.
  • the end pieces 5 may initially be fully or partially inserted; However, once a tension rod 12 is inserted into the guide tube 3 and with frontally mounted nuts (in FIG. 1 not shown) the formwork panels 11 pressed against the spacer tube 1 be, slide the cylindrical portions 9 of the end pieces 5 completely in the guide tube 3 a.
  • the end pieces 5 are connected to the guide tube 3 by a predetermined or continuous circumferential line.
  • the predetermined breaking lines may have different configurations and will be explained in more detail below by means of examples.
  • FIG. 3 comprises the predetermined breaking line in the ends of the guide tube 3 recessed from outside recesses or depressions 15 in the form of holes or slots which are mutually separated by narrow webs 17 in the circumferential direction of each other.
  • the recesses 15 are not continuous, but closed on one side by a membrane-like skin 19 to the interior of the guide tube 3.
  • the skin 19 forms a barrier impermeable to the liquid concrete and has a thickness of, for example, 0.05 to 0.1 millimeter.
  • the groove 15, which is laterally formed by Anbindekanten 20 in turn, has a skin or membrane-shaped base 19, which prevents the ingress of liquid concrete mass and the end piece 5 with the Guide tube 3 mechanically connects.
  • FIGS. 7a-7c A likewise a skin or a membrane comprehensive breaking line 13 is in the FIGS. 7a-7c shown.
  • the recesses 15 are inclined there to the orientation of the circumferential predetermined breaking line 13 and mutually formed little overlapping.
  • FIG. 7b shows the spacer tube 1 and one of its ends 5, when already a force F acts on the end piece 5.
  • the slot-shaped recesses 15 are pressed together and the opposite side walls in the recesses 15 reach into mutual contact.
  • FIG. 7c shows the tail 5 after stripping the wall and after a slight rotation of the end piece 5 with respect to the guide tube 3.
  • the conical end piece 5a is at the thinner end of the conical end piece 5 another cylindrical or preferably slightly conical formed portion or region 23, the end of which is connected by a circumferential skin or a circumferential, very thin-walled portion 25 with the inboard wall 27 of the guide tube 3.
  • the outer diameter of the portion 23 at its end is d 0 and is slightly smaller than the inner diameter d 1 of the guide tube 3.
  • the end pieces 5 according to the embodiment in Figure 6a, 6b are similar to those in the FIGS. 5a, 5b ,
  • the end piece 5 or the region 23 adjoining the lower end thereof has a larger diameter d 3 than the outer diameter d 4 of the guide tube 3.
  • the connecting web or connection skin 25 is here connected to the outer wall of the guide tube 3 and the end piece 5 slides under the action of a force F over the Guide tube 3 to a circumferential or partially circumferential stop 29. Due to the slightly conical design of the shell 31 of the region 23 and this end piece 5 can be easily pulled out of the latter after completion of the wall.
  • FIGS. 8 and 9 are additionally sprayed tabs 33 on the outer end sides of the end pieces 5.
  • the tabs 33 can be unilateral, as in FIG. 8 visible, or diagonally opposite in two places ( FIG. 9 ) may be connected to the end piece 5.
  • the tabs 33 lie down when the spacer 1 is inserted into a formwork on the end faces of the end pieces 5 rich. After stripping the tabs 3 can be detected either on one side or on both sides with the fingers or with a screwdriver and at this the end pieces 5 are pulled axially out of the wall or rotated about the axis A.
  • depressions may be provided on the inside or on the inside of the end pieces, which allow the insertion of a screwdriver or fingernail (not shown).
  • a screwdriver or fingernail (not shown).
  • nail-like tips 41 which penetrate into the surfaces of the shuttering panels.
  • the conical surface of the end pieces 5 may have an oval cross section, ie the vertical and the horizontal diameter D 1 and D 2 are of different sizes (see. FIG. 10 ).
  • the difference between the diameters D 1 and D 2 can be within the range of 1 to 2 mm, so that the depression formed on the wall surface after removal of the end pieces 5 continues to appear optically circular.
  • a further alternative possibility for facilitating the separation of the end pieces 5 from the guide tube 3 are retaining means, for example in the form of a bore 16 or a cam 18 (FIG. FIG. 4 ), formed at which a suitably shaped tool can detect the end piece 5.
  • the embodiment of the invention according to Figure 5a, 5b can not or only partially produce one piece, ie the guide tube 3 must be divided into two sections, each with an end piece 5, which can be pressure-tightly connected to each other after spraying in the axial direction.
  • a spacer tube section of length L is shown with the end piece 5, the guide tube section 3 'and for example, a sleeve 42.
  • the second half of the spacer tube with the guide tube 3 is again visible to an end piece 5 of length L 1.
  • Sealing beads 43 can be formed on the guide tube, which allow a tight and permanent connection of the two guide tube sections 3 ', 3".

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Automatic Assembly (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)

Description

Gegenstand der Erfindung ist ein Distanzrohr zum Führen von Spannstäben gemäss Oberbegriff des Patentanspruchs 1.The invention relates to a spacer tube for guiding tension rods according to the preamble of patent claim 1.

Die Schalungsplatten, welche die äussere Begrenzung beim Giessen von Betonbaukörpern bilden, müssen einerseits in einer festgelegten Distanz zueinander liegen, welche die Dicke der Wand bestimmt. Andererseits müssen die Schalungsplatten dem statischen Druck der eingefüllten flüssigen Betonmasse standhalten. Zu diesem Zweck ist es bekannt, rohrförmige Distanzhalter oder -rohre zwischen die Schalungsplatten einzusetzen, die es ermöglichen, durch das Rohrinnere und entsprechende Löcher in den Schalungsplatten einen Spannstab hindurchzuführen. Auf den beiden Enden des Spannstabes werden Schrauben aufgesetzt, mit denen die beiden Schalungsplatten gegen das Distanzrohr bzw. auf die Enden des Distanzrohres aufgesetzte meist konisch ausgebildete Endstücke anpressbar sind. Bei der Erstellung von Sichtbetonwänden ist es nötig, die Endstücke, welche an der Oberfläche der Wand zu liegen kommen, nach der Aushärtung des Betons zu entfernen. Zu diesem Zweck sind die Endstücke kegelstumpfförmig gestaltet und in das zylindrische Führungsrohr einsteckbar ausgebildet. Eine solche Anordnung ist im DE 9314656 U1 beschrieben. Damit keine flüssige Betonmasse in das Innere des Führungsrohrs eindringen und dort den eingesetzten Spannstab unlösbar mit dem Rohr verbinden kann, müssen die Einsteckbereiche der Endstücke sowohl sehr satt am Führungsrohr als auch an der Schalung anliegen. Dies bewirkt einerseits wohl eine gute Abdichtung gegen eindringendes Betonwasser und andererseits, dass die Endstücke nur mit Mühe und grossem zeitlichen Aufwand nach Fertigstellung der Wand aus letzterer und dem Rohr herauslösbar sind, ohne eine Beschädigung der die Endstücke umgebenden und später weiterhin sichtbaren Wandoberfläche hervorzurufen.The formwork panels, which form the outer boundary when casting concrete structures, must on the one hand be at a fixed distance from each other, which determines the thickness of the wall. On the other hand, the formwork panels must withstand the static pressure of the filled liquid concrete mass. For this purpose, it is known to insert tubular spacers or pipes between the formwork panels, which make it possible to pass through the pipe interior and corresponding holes in the formwork panels a tension rod. On the two ends of the tie rod screws are placed, with which the two formwork panels against the spacer tube or on the ends of the spacer tube patch mostly conical end pieces can be pressed. When constructing exposed concrete walls, it is necessary to remove the end pieces that come to rest on the surface of the wall after curing of the concrete. For this purpose, the end pieces are frusto-conical and formed plugged into the cylindrical guide tube. Such an arrangement is in DE 9314656 U1 described. So that no liquid concrete mass penetrate into the interior of the guide tube and there can permanently connect the inserted tension rod with the tube, the insertion of the end pieces must rest both very full on the guide tube and on the formwork. This causes on the one hand probably a good seal against penetrating concrete water and on the other hand, that the end pieces are difficult to liberate after completion of the wall of the latter and the tube with great effort and without causing damage to the end pieces surrounding and later still visible wall surface.

Für die Erstellung von Betonwänden, die später mit einem Verputz versehen werden, sind weiter Distanzrohre bekannt, deren Endstücke Teil der Führungsrohre sind und in der Mauer verbleiben. Die Herstellung solcher Distanzrohre ist kostengünstiger, doch lassen sie sich nicht für Sichtbetonwände benutzen, weil deren Endstücke unlösbar mit dem Führungsrohr verbunden sind.For the creation of concrete walls, which are later provided with a plaster, more spacer tubes are known, the end pieces are part of the guide tubes and remain in the wall. The preparation of such spacer tubes is cheaper, but they can not be used for exposed concrete walls because their end pieces are permanently connected to the guide tube.

Aus dem Stand der Technik (Deutsches Gebrauchsmuster 9316924.8 - D1) ist ein rohrförmiger Verschalungs-Abstandhalter bekannt.From the prior art (German Utility Model 9316924.8 - D1), a tubular shuttering spacer is known.

Dieser besteht aus einem zylindrischen Rohr, in welches an beiden Enden ein konisches Anlagestück eingesteckt und dort durch geeignete Rastmittel in eingesteckter Lage festgehalten wird. Die konischen Anlagestücke können nach der Fertigstellung der Wand, d.h. nach dem Betonieren und Aushärten, nur mit grosser Mühe aus den im Beton verbleibenden zylindrischen Rohren herausgelöst werden. Es muss der Widerstand der hakenförmigen Rippe zusätzlich zur recht intensiven Verbindung mit dem Beton überwunden werden.This consists of a cylindrical tube, in which a conical investment piece is inserted at both ends and held there by suitable locking means in the inserted position. The conical abutment pieces can after the completion of the wall, i. after concreting and hardening, only with great difficulty be removed from the cylindrical tubes remaining in the concrete. It is necessary to overcome the resistance of the hook-shaped rib in addition to the rather intense connection with the concrete.

Im Weiteren besteht bei diesem bekannten Abstandhalter der Nachteil, dass keine Möglichkeit besteht, bereits beim Schalen und dadurch axialen Zusammenpressen des Abstandhalters, die Verbindung zwischen den konischen Anlagestücken und dem zylindrischen Rohr ganz oder teilweise (vor dem Betonieren) aufzubrechen.Furthermore, there is the disadvantage in this known spacer that there is no possibility already during shelling and thereby axial compression of the spacer, break the connection between the conical contact pieces and the cylindrical tube in whole or in part (before concreting).

Der Erfindung liegt nun die Aufgabe zugrunde, ein Distanzrohr für die Erstellung von Sichtbetonwänden weiterzubilden, das einerseits ein Eindringen der flüssigen Betonmasse in den den Führungsstab umgebenden Zwischenraum im Führungsrohr verhindert und andererseits ein leichtes Herauslösen der Endstücke aus der Wandoberfläche sicherstellt.The invention is an object of the invention to develop a spacer tube for the creation of exposed concrete walls, on the one hand prevents penetration of the liquid concrete mass in the guide rod surrounding gap in the guide tube and on the other hand ensures easy detachment of the end pieces of the wall surface.

Gelöst wird diese Aufgabe durch ein Distanzrohr mit den Merkmalen des Patentanspruchs 1.
Vorteilhafte Weiterbildungen des Erfindungsgegenstandes sind in den abhängigen Ansprüchen definiert.This object is achieved by a spacer tube having the features of patent claim 1.
Advantageous developments of the subject invention are defined in the dependent claims.

Die ein- oder zweiteilige Ausgestaltung des Distanzrohrs mit den Endstücken erweist sich als vorteilhaft, weil bei der Herstellung geringere Kosten anfallen, weniger Materialeinsatz (Kunststoff) für die Herstellung des Distanzrohrs benötigt wird und das Herauslösen der Endstücke an der fertiggestellten Wand ohne oder nur mit geringem Aufwand möglich ist. Durch eine nicht rotationssymmetrische Ausbildung der konusförmigen Oberfläche der Endstücke lassen sich diese durch eine Drehung mit wenig Kraftaufwand vom Ende des Führungsrohres und der Wand ablösen bzw. wegbrechen. Eine Schrägstellung einer Sollbruchlinie bezüglich einer zur Längsachse der Distanzrohres lotrechten Ebene zwischen dem Führungsrohr und dem Endstück bewirkt eine schraubenlinienförmige und folglich eine axiale Verschiebung des Endstückes, wenn letzteres in Drehung versetzt wird. Dadurch löst sich die Oberfläche des Endstücks von der Betonmasse und das Endstück vom Rohr ab, ohne dass diese asymmetrisch ausgebildet sein muss. Auch die ein Eindringen von flüssiger Betonmasse im Sollbruchbereich die Endstücke und das Rohr verbindende Haut wird abgetrennt. In einer besonders vorteilhaften Ausgestaltung der Erfindung lösen sich die Endstücke bereits beim Spannen der Schalungen vom Distanzrohr, ohne undicht zu werden. Die Endstücke lassen sich später aus der fertigen Wand herausziehen oder lösen sich von selbst. Mit einer an der Stirnfläche des Endstücks angespritzten Grifflasche kann das Endstück vom Führungsrohr abgezogen oder bezüglich letzterem verdreht und so vom Führungsrohr abgelöst werden.The one- or two-part design of the spacer tube with the end pieces proves to be advantageous because lower costs incurred in the production, less material (plastic) is required for the production of the spacer tube and the detachment of the end pieces on the finished wall with little or no Effort is possible. By a non-rotationally symmetrical design of the conical surface of the end pieces can be replaced by a rotation with little effort from the end of the guide tube and the wall or break away. An inclination of a predetermined breaking line with respect to a plane perpendicular to the longitudinal axis of the spacer tube level between the guide tube and the tail causes a helical and thus an axial displacement of the end piece when the latter is set in rotation. As a result, the surface of the tail of the concrete mass and the tail of the pipe dissolves, without having to be asymmetrical. The penetration of liquid concrete mass in the predetermined breaking area, the end pieces and the skin connecting skin is separated. In a particularly advantageous embodiment of the invention, the end pieces solve when clamping the formwork from the spacer tube without leaking. The end pieces can later be pulled out of the finished wall or detach themselves. With a molded onto the end face of the tail gripping tab, the tail can be subtracted from the guide tube or twisted with respect to the latter and so detached from the guide tube.

Anhand einiger illustrierter Ausführungsbeispiele wird die Erfindung näher erläutert. Es zeigen

Figur 1
einen Längsschnitt durch ein Distanzrohr gemäss dem Stand der Technik mit zwei eingesteckten Endstücken zwischen zwei Schalungsplatten,
Figur 2
eine Ansicht eines ersten Ausführungsbeispiels eines erfindungsgemäss ausgebildeten Distanzrohrs mit Sollbruchstellen zwischen Endstücken und einem konischen Führungsrohr,
Figur 3
einen Teilquerschnitt durch ein einteilig hergestelltes Distanzrohr mit einer perforierten Sollbruchlinie gemäss Figur 2,
Figur 4
einen Teilquerschnitt durch ein einteilig hergestelltes Distanzrohr mit einer umlaufenden filmartigen Sollbruchlinie gemäss Figur 2,
Figur 5a
einen Teilquerschnitt durch ein einteilig hergestelltes Distanzrohr mit einer radial liegenden Sollbruchlinie (ungebrochen) gemäss Figur 2,
Figur 5b
das Distanzrohr in Figur 5a nach dem Bruch der Sollbruchlinie,
Figur 6a
einen Teilquerschnitt durch ein einteilig hergestelltes Distanzrohr gemäss einem zweiten Ausführungsbeispiel mit einer radial liegenden Sollbruchlinie (ungebrochen),
Figur 6b
das Distanzrohr in Figur 5a nach dem Bruch der Sollbruchlinie,
Figur 7a
ein Distanzrohr mit mehreren schrägliegenden Sollbruchlinienabschnitten im Ausgangszustand,
Figur 7b
das Distanzrohr nach dem Zusammenpressen mit einem Spannstab (entspricht dem Zustand während des Betonierens),
Figur 7c
das Distanzrohr nach einer Teildrehung des Endstücks und dem Bruch der Sollbruchlinienabschnitte,
Figur 8
eine Teilansicht eines Distanzrohrs mit einem Endstück mit einseitig abgehobener Abreisslasche,
Figur 9
eine Teilansicht eines Distanzrohrs mit zweiseitig abgehobener Aufreisslasche,
Figur 10
einen Querschnitt längs Linie X - X durch das Endstück in Figur 2 mit nicht kreisrundem Querschnitt,
Figur 11
eine Seitenansicht eines zweiteiligen Distanzrohrs.
Based on some illustrated embodiments, the invention will be explained in more detail. Show it
FIG. 1
a longitudinal section through a spacer tube according to the prior art with two inserted end pieces between two formwork panels,
FIG. 2
a view of a first embodiment of an inventively designed spacer tube with predetermined breaking points between end pieces and a conical guide tube,
FIG. 3
a partial cross section through a one-piece produced spacer tube with a perforated predetermined breaking line according to FIG. 2 .
FIG. 4
a partial cross section through a one-piece produced spacer tube with a circumferential film-like predetermined breaking line according to FIG. 2 .
FIG. 5a
a partial cross section through a one-piece manufactured spacer tube with a radially lying predetermined breaking line (unbroken) according to FIG. 2 .
FIG. 5b
the spacer tube in FIG. 5a after breaking the fracture line,
FIG. 6a
a partial cross section through a one-piece manufactured spacer tube according to a second embodiment with a radially located predetermined breaking line (unbroken),
FIG. 6b
the spacer tube in FIG. 5a after breaking the fracture line,
Figure 7a
a spacer tube with a plurality of oblique predetermined breaking line sections in the initial state,
FIG. 7b
the spacer tube after compression with a tension rod (corresponds to the state during concreting),
FIG. 7c
the spacer tube after a partial rotation of the tail and the breakage of the predetermined breaking line sections,
FIG. 8
a partial view of a spacer tube with an end piece with unilaterally lifted pull-tab,
FIG. 9
a partial view of a spacer tube with two-sided lifted tear tab,
FIG. 10
a cross section along line X - X through the tail in FIG. 2 with non-circular cross section,
FIG. 11
a side view of a two-piece spacer tube.

Mit Bezugszeichen 1 ist ein aus dem Stand der Technik bekanntes Distanzrohr, umfassend ein im wesentlichen zylindrisch ausgebildetes Führungsrohr 3 und zwei an den stirnseitigen Enden des Führungsrohrs 3 angeordneten Endstücken 5 bezeichnet. Die Endstücke 5 sind in diesem bekannten Distanzrohr 1 gemäss Figur 1 in das Führungsrohr 3 eingeschoben. Sie umfassen zu diesem Zweck nebst dem konischen Mantel 7, der ausserhalb des Führungsrohrs 3 zu liegen kommt, einen zylindrischen Abschnitt 9. Die beiden Endstücke 5 werden vor dem Einsetzen zwischen zwei Schalungsplatten 11 in das Führungsrohr 3 eingeschoben. Das Zusammenführen der Endstücke 5 mit dem Führungsrohr 3 kann beim Hersteller oder auf der Baustelle erfolgen. Üblicherweise wird diese Montagearbeit auf der Baustelle erledigt. Die Endstücke 5 können anfänglich ganz oder nur teilweise eingeschoben sein; sobald jedoch ein Spannstab 12 in das Führungsrohr 3 eingeführt und mit stirnseitig aufgesetzten Muttern (in Figur 1 nicht dargestellt) die Schalungsplatten 11 gegen das Distanzrohr 1 gepresst werden, gleiten die zylindrischen Abschnitte 9 der Endstücke 5 vollständig in das Führungsrohr 3 ein.Reference numeral 1 designates a spacer tube known from the prior art, comprising a substantially cylindrically shaped guide tube 3 and two end pieces 5 arranged at the front ends of the guide tube 3. The end pieces 5 are in accordance with this known spacer tube 1 FIG. 1 inserted into the guide tube 3. They include for this purpose, in addition to the conical jacket 7, which comes to rest outside the guide tube 3, a cylindrical portion 9. The two end pieces 5 are inserted before insertion between two formwork panels 11 in the guide tube 3. The merging of the end pieces 5 with the guide tube 3 can be done at the manufacturer or on the site. Usually, this assembly work is done on site. The end pieces 5 may initially be fully or partially inserted; However, once a tension rod 12 is inserted into the guide tube 3 and with frontally mounted nuts (in FIG. 1 not shown) the formwork panels 11 pressed against the spacer tube 1 be, slide the cylindrical portions 9 of the end pieces 5 completely in the guide tube 3 a.

In den nachfolgend beschriebenen erfindungsgemässen Distanzrohren 1 sind die Endstücke 5 durch eine ganz oder unterbrochen umlaufende Sollbruchlinie mit dem Führungsrohr 3 verbunden. Die Sollbruchlinien können unterschiedliche Ausbildungen aufweisen und werden nachfolgend anhand von Beispielen näher erläutert.In the spacer tubes 1 according to the invention described below, the end pieces 5 are connected to the guide tube 3 by a predetermined or continuous circumferential line. The predetermined breaking lines may have different configurations and will be explained in more detail below by means of examples.

In Figur 3 umfasst die Sollbruchlinie in den Enden des Führungsrohrs 3 von aussen eingelassene Ausnehmungen oder Vertiefungen 15 in Gestalt von Löchern oder Schlitzen, die gegenseitig durch schmale Stege 17 in umlaufender Richtung voneinander getrennt sind. Die Ausnehmungen 15 sind nicht durchgehend, sondern einseitig durch eine membranartige Haut 19 zum Innern des Führungsrohrs 3 verschlossen. Die Haut 19 bildet eine für den flüssigen Beton undurchdringliche Sperre und weist eine Dicke von beispielsweise 0.05 bis 0.1 Millimeter auf.
Im Beispiel gemäss Figur 4 ist die Ausnehmung 15 umlaufend als Nut ausgebildet und es fehlen die Stege 17. Die Nut, die seitlich durch Anbindekanten 20 gebildet ist, weist wiederum einen haut- oder membranförmigen Grund 19 auf, der das Eindringen von flüssiger Betonmasse verhindert und das Endstück 5 mit dem Führungsrohr 3 mechanisch verbindet.In FIG. 3 comprises the predetermined breaking line in the ends of the guide tube 3 recessed from outside recesses or depressions 15 in the form of holes or slots which are mutually separated by narrow webs 17 in the circumferential direction of each other. The recesses 15 are not continuous, but closed on one side by a membrane-like skin 19 to the interior of the guide tube 3. The skin 19 forms a barrier impermeable to the liquid concrete and has a thickness of, for example, 0.05 to 0.1 millimeter.
In the example according to FIG. 4 the groove 15, which is laterally formed by Anbindekanten 20, in turn, has a skin or membrane-shaped base 19, which prevents the ingress of liquid concrete mass and the end piece 5 with the Guide tube 3 mechanically connects.

Eine ebenfalls eine Haut oder eine Membran umfassende Sollbruchlinie 13 ist in den Figuren 7a - 7c dargestellt. Die Ausnehmungen 15 sind dort geneigt zur Ausrichtung der umlaufenden Sollbruchlinie 13 und sich gegenseitig wenig überschneidend ausgebildet. Figur 7b zeigt das Distanzrohr 1 bzw. eines seiner Enden 5, wenn bereits eine Kraft F auf das Endstück 5 wirkt. Dabei werden die schlitzförmigen Ausnehmungen 15 zusammengepresst und die in den Ausnehmungen 15 einander gegenüberliegenden Seitenwände gelangen in gegenseitige Anlage. Figur 7c zeigt das Endstück 5 nach dem Ausschalen der Wand und nach einer geringfügigen Drehung des Endstücks 5 bezüglich des Führungsrohrs 3. Durch die Drehung des Endstücks 5 sind die haut- oder membranförmigen Bereiche in den Ausnehmungen 15 und die dazwischenliegenden Stege aufgebrochen und das Endstück hat sich auf den schrägliegenden Seitenwänden der Ausnehmung 15 in Richtung des Pfeils a axial bewegt (Fig. 7c). Diese axiale Bewegung bewirkt ein Ablösen der konischen Aussenoberfläche 21 des Endstücks 5 von der konisch verlaufenden Betonoberfläche und damit auch ein Ablösen des Endstücks 5 vom Führungsrohr 3.
In den Beispielen gemäss den Figuren 5a,5b sowie 6a,6b sind die Endstücke 5 durch peripher liegende Sollbruchlinien 13 miteinander verbunden. In Figur 5a ist am dünneren Ende des konischen Endstücks 5 ein weiterer zylindrischer oder vorzugsweise geringfügig konisch gestalteter Abschnitt oder Bereich 23 ausgebildet, dessen Ende durch eine umlaufende Haut oder einen umlaufenden, sehr dünnwandigen Bereich 25 mit der innenliegendend Wand 27 des Führungsrohrs 3 verbunden ist. Der Aussendurchmesser des Abschnitts 23 an seinem Ende beträgt d0 und ist wenig kleiner als der Innendurchmesser d1 des Führungsrohrs 3. Sobald eine Kraft F axial auf das Endstück 5 wirkt, d.h. wenn die beiden Schalungsplatten 11 durch den Spannstab oder andere Kräfte zusammengeführt werden, bricht der Steg 25 und der Bereich 23 des Endstücks 5 schiebt sich ins Führungsrohr 3 hinein. Durch eine leicht konische Ausgestaltung des Abschnitts 23 findet wohl am oberen Ende des Abschnitts 23 mit dem stirnseitigen Ende des Führungsrohrs 3 eine sichere Abdichtung statt, aber das Endstück 5 verklemmt sich nicht im Führungsrohr 3 und kann nach Fertigstellung der Wand leicht abgenommen werden.A likewise a skin or a membrane comprehensive breaking line 13 is in the FIGS. 7a-7c shown. The recesses 15 are inclined there to the orientation of the circumferential predetermined breaking line 13 and mutually formed little overlapping. FIG. 7b shows the spacer tube 1 and one of its ends 5, when already a force F acts on the end piece 5. The slot-shaped recesses 15 are pressed together and the opposite side walls in the recesses 15 reach into mutual contact. FIG. 7c shows the tail 5 after stripping the wall and after a slight rotation of the end piece 5 with respect to the guide tube 3. By the rotation of the end piece 5, the skin or membrane-shaped areas in the recesses 15 and the intermediate webs are broken and the tail has on the oblique side walls of the recess 15 in the direction of arrow a moves axially ( Fig. 7c ). This axial movement causes a detachment of the conical outer surface 21 of the end piece 5 of the conical concrete surface and thus a detachment of the end piece 5 from the guide tube. 3
In the examples according to the FIGS. 5a, 5b and 6a, 6b, the end pieces 5 are interconnected by peripheral predetermined breaking lines 13. In FIG. 5a is at the thinner end of the conical end piece 5 another cylindrical or preferably slightly conical formed portion or region 23, the end of which is connected by a circumferential skin or a circumferential, very thin-walled portion 25 with the inboard wall 27 of the guide tube 3. The outer diameter of the portion 23 at its end is d 0 and is slightly smaller than the inner diameter d 1 of the guide tube 3. Once a force F acts axially on the end piece 5, that is, when the two formwork panels 11 are brought together by the tie rod or other forces, breaks the web 25 and the portion 23 of the end piece 5 pushes into the guide tube 3 into it. By a slightly conical configuration of the section 23 takes place at the upper end of the section 23 with the front end of the guide tube 3 a secure seal instead, but the end piece 5 does not jammed in the guide tube 3 and can be easily removed after completion of the wall.

Die Endstücke 5 gemäss dem Ausführungsbeispiel in Figur 6a,6b sind ähnlich ausgebildet wie diejenigen in den Figuren 5a,5b. Das Endstück 5 bzw. der an dessen unterem Ende anschliessende Bereich 23 weist in dieser Ausführung einen grösseren Durchmesser d3 auf als der Aussendurchmesser d4 des Führungsrohrs 3. Der Verbindungssteg oder die Verbindungshaut 25 ist hier mit der Aussenwand des Führungsrohrs 3 verbunden und das Endstück 5 gleitet unter Einwirkung einer Kraft F über das Führungsrohr 3 bis an einen umlaufenden oder teilweise umlaufenden Anschlag 29. Durch die leicht konische Ausbildung des Mantels 31 des Bereichs 23 kann auch dieses Endstück 5 nach Fertigstellung der Wand leicht aus letzterer herausgezogen werden.The end pieces 5 according to the embodiment in Figure 6a, 6b are similar to those in the FIGS. 5a, 5b , In this embodiment, the end piece 5 or the region 23 adjoining the lower end thereof has a larger diameter d 3 than the outer diameter d 4 of the guide tube 3. The connecting web or connection skin 25 is here connected to the outer wall of the guide tube 3 and the end piece 5 slides under the action of a force F over the Guide tube 3 to a circumferential or partially circumferential stop 29. Due to the slightly conical design of the shell 31 of the region 23 and this end piece 5 can be easily pulled out of the latter after completion of the wall.

In den Figuren 8 und 9 sind an den äusseren Stirnseiten der Endstücke 5 zusätzlich Laschen 33 angespritzt. Die Laschen 33 können einseitig, wie in Figur 8 ersichtlich, oder diagonal gegenüberliegend an zwei Stellen (Figur 9) mit dem Endstück 5 verbunden sein. Die Laschen 33 legen sich, wenn der Distanzhalter 1 in eine Schalung eingelegt wird, an den Stirnseiten der Endstücke 5 satt an. Nach dem Ausschalen können die Laschen 3 entweder einseitig oder beidseitig mit den Fingern oder mit einem Schraubendreher erfasst und an diesen die Endstücke 5 axial aus der Wand herausgezogen oder um deren Achse A verdreht werden. Um die Laschen 33 und/oder die Endstücke 5 nach dem Betonieren leicht erfassen zu können, können an deren Innenseite bzw. an der Innenseite der Endstücke Vertiefungen angebracht sein, die das Einführen eines Schraubenziehers oder Fingernagels ermöglichen (keine Abb.).
Als zusätzliche Erleichterung beim Abnehmen der Endstücke 5 können deren Stirnflächen mit nagelartigen Spitzen 41 versehen sein, die in die Oberflächen der Schalungsplatten eindringen. Beim Ausschalen bleiben die Endstücke 5 ganz oder teilweise an den Schalungsplatten hängen oder tragen zum Ausbrechen der Endstücke 5 bei.In the FIGS. 8 and 9 are additionally sprayed tabs 33 on the outer end sides of the end pieces 5. The tabs 33 can be unilateral, as in FIG. 8 visible, or diagonally opposite in two places ( FIG. 9 ) may be connected to the end piece 5. The tabs 33 lie down when the spacer 1 is inserted into a formwork on the end faces of the end pieces 5 rich. After stripping the tabs 3 can be detected either on one side or on both sides with the fingers or with a screwdriver and at this the end pieces 5 are pulled axially out of the wall or rotated about the axis A. In order to easily grasp the tabs 33 and / or the end pieces 5 after concreting, depressions may be provided on the inside or on the inside of the end pieces, which allow the insertion of a screwdriver or fingernail (not shown).
As an additional relief when removing the end pieces 5 whose end faces may be provided with nail-like tips 41, which penetrate into the surfaces of the shuttering panels. When stripping the end pieces 5 remain completely or partially hang on the formwork panels or contribute to the breaking of the end pieces 5 at.

Zur weiteren Erleichterung des Herauslösens der Endstücke 5 kann die konische Oberfläche der Endstücke 5 einen ovalen Querschnitt aufweisen, d.h. der vertikale und der horizontale Durchmesser D1 und D2 sind unterschiedlich gross (vgl. Figur 10). Die Differenz der Durchmesser D1 und D2 kann im Rahmen von 1 bis 2 mm liegen, so dass die nach dem Entfernen der Endstücke 5 entstehende Vertiefung an der Wandoberfläche weiterhin optisch kreisrund erscheint.To further facilitate the detachment of the end pieces 5, the conical surface of the end pieces 5 may have an oval cross section, ie the vertical and the horizontal diameter D 1 and D 2 are of different sizes (see. FIG. 10 ). The difference between the diameters D 1 and D 2 can be within the range of 1 to 2 mm, so that the depression formed on the wall surface after removal of the end pieces 5 continues to appear optically circular.

Eine weitere alternative Möglichkeit zur Erleichterung des Abtrennens der Endstücke 5 vom Führungsrohr 3 sind Rückhaltemittel, z.B. in Gestalt einer Bohrung 16 oder eines Nockens 18 (Figur 4), ausgebildet, an denen ein geeignet geformtes Werkzeug das Endstück 5 erfassen kann.A further alternative possibility for facilitating the separation of the end pieces 5 from the guide tube 3 are retaining means, for example in the form of a bore 16 or a cam 18 (FIG. FIG. 4 ), formed at which a suitably shaped tool can detect the end piece 5.

Die Ausführungsform der Erfindung gemäss Figur 5a,5b lässt sich nicht oder nur bedingt einteilig herstellen, d.h. das Führungsrohr 3 muss in zwei Abschnitte mit je einem Endstück 5 aufgeteilt werden, die nach dem Spritzen in axialer Richtung druckfest miteinander verbunden werden können. In Figur 11 ist auf der linken Seite ein Distanzrohrabschnitt von der Länge L dargestellt mit dem Endstück 5, dem Führungsrohrabschnitt 3' und beispielsweise einer Muffe 42. Auf der rechten Seite der Figur 11 ist die zweite Hälfte des Distanzrohrs mit dem Führungsrohr 3" wiederum einem Endstück 5 von der Länge L1 sichtbar. Auf dem Führungsrohr können Dichtungswulste 43 angeformt sein, welche ein dichtes und unlösbares Verbinden der beiden Führungsrohrabschnitte 3',3" ermöglichen. Eine im Inneren des Führungsrohrabschnitts 3' angebrachte Rippe verhindert das weitere Eindringen des Führungsrohrabschnitts 3" und stellt die Druckfestigkeit sicher. Weiter können auch ins Rohrinnere vorstehende Nocken oder Gewinde die vorgegebene Länge des Distanzrohrs sicherstellen.
Weiter können im Führungsrohrabschnitt 3" Sollbruchlinien 45 ausgebildet sein, welche es erlauben, die Länge des Distanzrohrabschnittes auf eine Länge L2 oder L3 zu verkürzen. Auf diese Weise können entsprechend der später zu erstellenden Wand passende Distanzrohre 1 zusammengestellt werden. Selbstverständlich ist es auch möglich, nebst den Distanzrohrabschnitten, wie sie auf der linken Seite der Figur 11 dargestellt sind, die stets die gleiche Länge L aufweisen, Distanzrohrabschnitte (rechte Seite der Figur 11) mit unterschiedlichen Längen L1 bis L3 zu spritzen, ohne dass diese vor Gebrauch noch konfektioniert werden müssen.The embodiment of the invention according to Figure 5a, 5b can not or only partially produce one piece, ie the guide tube 3 must be divided into two sections, each with an end piece 5, which can be pressure-tightly connected to each other after spraying in the axial direction. In FIG. 11 On the left side, a spacer tube section of length L is shown with the end piece 5, the guide tube section 3 'and for example, a sleeve 42. On the right side of the FIG. 11 the second half of the spacer tube with the guide tube 3 "is again visible to an end piece 5 of length L 1. Sealing beads 43 can be formed on the guide tube, which allow a tight and permanent connection of the two guide tube sections 3 ', 3". A rib mounted in the interior of the guide tube section 3 'prevents the further penetration of the guide tube section 3' and ensures compressive strength Furthermore, cams or threads projecting into the tube interior can also ensure the predetermined length of the spacer tube.
Furthermore, predetermined breaking lines 45 can be formed in the guide tube section 3, which make it possible to shorten the length of the spacer tube section to a length L 2 or L 3. In this way, suitable spacer tubes 1 can be assembled in accordance with the wall to be created later possible, along with the spacer tube sections as they are on the left side of the FIG. 11 are shown, which always have the same length L, spacer tube sections (right side of the FIG. 11 ) with different lengths L 1 to L 3 to inject, without having to be assembled before use.

Claims (9)

  1. A spacing tube (1) for the insertion of tensioning rods (12) in the construction of largearea formwork for concrete structures, comprising a substantially cylindrical guide tube (3) having end pieces (5) arranged at the two ends thereof,
    characterized in that the end pieces (5) are integrally formed with the guide tube (3), and that the connections between the end pieces (5) and the ends of the guide tube (3) are formed as predetermined breaking areas (13) which can be broken from the ends of the guide tube (3) during shuttering, removal of formwork or after removal of formwork from the structure.
  2. The spacing tube according to claim 1, characterized in that the predetermined breaking areas (13) can be broken by tension applied to the end piece (5) or pressure exerted on the end piece (5) and/or by tension applied on the end piece (5) and/or by rotating the end piece (5).
  3. The spacing tube according to claim 2, characterized in that each predetermined breaking area (13) comprises a wholly or partly circumferential material skin (19) or thin spot (17, 25) connecting the end piece (5) to the guide tube (3).
  4. The spacing tube according to claim 3, characterized in that the material skin (19) or thin spot (17, 25) runs between two parallel circumferential connecting edges (20) or between two circumferential connecting edges having a tooth form.
  5. The spacing tube according to claim 4, characterized in that the skin (19) is formed by at least one circumferential recess (15) only partly penetrating the wall of the guide tube (3) and/or the end piece (5).
  6. The spacing tube according to any one of claims 1 to 3, characterized in that a tubular section (23) is formed at the end piece (5), the outer diameter (d0) of which tubular section is smaller than the inner diameter (d1) of the guide tube (3), or that the inner diameter (d3) of the section (23) is greater than the outer diameter (d4) of the guide tube (3), and that the section (23) is connected by a circumferential thin spot (25) or skin (19) located in the plane of the front sides of the section (23) at the end piece (5) and of the guide tube (3).
  7. The spacing tube according to any one of claims 1 to 6, characterized in that at least one tab (33) is formed on the front side of each end piece (5), wherein the at least one tab (33) is connected to the front side of the end pieces (5) on one side or at two diagonally opposite points, and/or that means for grasping with a screwdriver or a fingernail are formed on the tabs (33) and/or the inside of the end pieces (5).
  8. The spacing tube according to any one of claims 1 to 7, characterized in that needle-like tips (41) are integrally formed on the front sides of the end pieces (5), which needle-like tips penetrate the formwork panels and favour the detachment of the end pieces (5) from the guide tube (3) during removal of formwork, and/or that retaining means (16,18) for a pull-off tool are injection moulded or integrally formed on the end pieces (5).
  9. The spacing tube according to any one of claims 1 to 8, characterized in that the guide tube (3) is divided into two sections (3', 3"), wherein each section (3', 3") comprises an end piece (5) and a connecting means (41, 43), which connecting means (41, 43) connects the two sections (3', 3") to each other in an axial direction to be pressure-proof.
EP20040405748 2003-12-16 2004-12-02 Spacing tube for the insertion of tensioning rods Active EP1544380B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05003614A EP1550781A3 (en) 2003-12-16 2004-12-02 End piece for a spacing tube designed for the insertion of tensioning rods

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH200302145 2003-12-16
CH21452003 2003-12-16

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP05003614A Division EP1550781A3 (en) 2003-12-16 2004-12-02 End piece for a spacing tube designed for the insertion of tensioning rods
EP05003614.4 Division-Into 2005-02-19

Publications (3)

Publication Number Publication Date
EP1544380A2 EP1544380A2 (en) 2005-06-22
EP1544380A3 EP1544380A3 (en) 2008-02-27
EP1544380B1 true EP1544380B1 (en) 2013-11-13

Family

ID=34468815

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EP05003614A Withdrawn EP1550781A3 (en) 2003-12-16 2004-12-02 End piece for a spacing tube designed for the insertion of tensioning rods
EP20040405748 Active EP1544380B1 (en) 2003-12-16 2004-12-02 Spacing tube for the insertion of tensioning rods

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Application Number Title Priority Date Filing Date
EP05003614A Withdrawn EP1550781A3 (en) 2003-12-16 2004-12-02 End piece for a spacing tube designed for the insertion of tensioning rods

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021129101A1 (en) 2021-11-09 2023-05-11 Georg Weidner Spacers and transport arrangement

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Publication number Priority date Publication date Assignee Title
DE202012005846U1 (en) * 2012-06-14 2012-07-23 Nevoga At Gmbh Spacer element
ITUB20160199A1 (en) * 2016-01-14 2017-07-14 Flex House Srl SPACER ELEMENT FOR CASSERO TO LOSE FOR THE CONSTRUCTION OF WALLS AND DRAINAGE TO LOSE INCORPORATING SUCH SPACER ELEMENT
DE102016220753B4 (en) 2016-10-21 2024-05-08 Leonhard Weiss Gmbh & Co. Kg Sheathing device
DE102018205384A1 (en) * 2018-04-10 2019-10-10 Hünnebeck GmbH Assembly of a wall formwork, anchor system and sleeve
CN110439285A (en) * 2018-05-04 2019-11-12 石金弘 Combination is to drawing screw rod isolator

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CH440660A (en) 1965-07-16 1967-07-31 Amsler Max Support foot for spacer tubes for concrete formwork
CH444454A (en) * 1966-06-17 1967-09-30 Streng Alfred Spacer for shuttering boards
DE2522887A1 (en) * 1975-05-23 1976-12-09 Ekkehard Friedl Concrete wall formwork spacer support cone - has threaded course on truncated conical sheathing surface facilitating removal
DE8025862U1 (en) * 1980-09-26 1981-02-26 Max Frank Gmbh & Co Kg, 8441 Leiblfing TOOL FOR REMOVING SEALING ELEMENTS FROM SPACERS, ESPECIALLY FROM WALL STRENGTHS
JPS58117154A (en) * 1981-12-29 1983-07-12 鹿島建設株式会社 Execution of body of building joint part
DE3840757C1 (en) * 1988-12-03 1990-01-04 Heinrich Heemeyer Gmbh & Co Kg, 4983 Kirchlengern, De Spacer pipe for concrete shutterings, and process for the production thereof
CH686196A5 (en) * 1992-09-30 1996-01-31 Giulio Albanese Spacer tube for double layered shuttering
DE4337523C2 (en) * 1993-11-01 1996-12-12 Emmanuel Ouranos Spacer and fastening for concrete formwork, at the same time device for fastening the reinforcement and keeping it at a certain, predetermined distance from the formwork
DE9316924U1 (en) * 1993-11-05 1994-01-13 Reuß GmbH & Co KG, 42277 Wuppertal Tubular formwork spacer
DE20214936U1 (en) * 2002-09-26 2002-12-19 Mathies GmbH, 24395 Pommerby Device for the opposite arrangement of spaced formwork walls

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021129101A1 (en) 2021-11-09 2023-05-11 Georg Weidner Spacers and transport arrangement

Also Published As

Publication number Publication date
EP1544380A2 (en) 2005-06-22
EP1550781A2 (en) 2005-07-06
EP1550781A3 (en) 2008-02-27
EP1544380A3 (en) 2008-02-27

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