EP0432397A2 - Disassembling device - Google Patents

Disassembling device Download PDF

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Publication number
EP0432397A2
EP0432397A2 EP90119222A EP90119222A EP0432397A2 EP 0432397 A2 EP0432397 A2 EP 0432397A2 EP 90119222 A EP90119222 A EP 90119222A EP 90119222 A EP90119222 A EP 90119222A EP 0432397 A2 EP0432397 A2 EP 0432397A2
Authority
EP
European Patent Office
Prior art keywords
undercut
claw
sleeve
threaded rod
borehole
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.)
Withdrawn
Application number
EP90119222A
Other languages
German (de)
French (fr)
Other versions
EP0432397A3 (en
Inventor
Burkhard Mayer
Willi Haug
Hartmut Hoppe
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.)
Fischerwerke Artur Fischer GmbH and Co KG
Original Assignee
Fischerwerke Artur Fischer GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fischerwerke Artur Fischer GmbH and Co KG filed Critical Fischerwerke Artur Fischer GmbH and Co KG
Publication of EP0432397A2 publication Critical patent/EP0432397A2/en
Publication of EP0432397A3 publication Critical patent/EP0432397A3/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/023—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same using screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B31/00—Hand tools for applying fasteners

Definitions

  • the invention relates to a dismantling device according to the preamble of the main claim.
  • undercut anchors used in boreholes of masonry has not yet been satisfactorily solved.
  • Such undercut anchors have an expanding body seated on the bottom of the borehole, onto which an expansion sleeve is driven, so that the expanding sleeve engages in a form-fitting manner in an undercut of the borehole formed on the bottom of the borehole.
  • the disassembly of an undercut anchor anchored in this way is problematic since the expansion sleeve is braced in the area of the undercut with the borehole wall.
  • the invention has for its object to provide a mounting device that makes it possible to remove undercut anchors positively anchored in boreholes from the boreholes.
  • the disassembly device has a claw which engages laterally in a form-fitting manner on the sleeve of the undercut anchor.
  • an annular groove can be provided on the sleeve end of the undercut anchor protruding from the borehole, which engages the claw with parallel jaws.
  • a threaded rod which is screwed through an internally threaded part, can now be pressed against the threaded bolt of the undercut anchor during disassembly, the threaded rod being rotated by means of a screwdriver or also by hand.
  • the internal thread part is preferably provided with a through thread, so that the threaded rod protrudes at the top with a profiled section from this internal thread part.
  • the profiled section can be a hexagon, for example, which can be clamped into a drill receptacle of a drill driver.
  • the dismantling device shown in FIG. 1 consists of a threaded part 1, a claw 2 and a threaded rod 3 guided through the threaded part 1.
  • the threaded rod 3 engages with its thread in an internal thread 4 of the threaded part 1 and lies with its lower end 5 on a threaded bolt 6 of an undercut anchor 7.
  • the threaded bolt 6 has, in a manner known per se, an expansion cone 8 at the lower end, onto which expansion segments 9 of an expansion sleeve 10 are driven.
  • the expansion segments 9 positively engage in an undercut 19 of the borehole 11.
  • the expansion cone 8 lies against the bottom of the borehole.
  • the upper end of the expansion sleeve 10 protrudes from the borehole and has an annular groove 12 into which opposing jaws 13 of the claw 2 engage.
  • this has a profile 14, on which a drill or a suitable tool can be attached. If the threaded rod 3 is rotated, the threaded rod 3 experiences an axial relative movement with respect to the claw 2. This means that by rotating the threaded rod 3 it can be pressed against the threaded bolt 6, whereby the claw 2 with a corresponding tensile force at the upper end 15 of the sleeve 10 attacks. If the compressive force and the tensile force are sufficiently large, this causes the cone 8 to be pressed slightly into the masonry at the bottom of the borehole, while at the same time the sleeve 10 and the expansion slats 9 connected to it are pulled upwards. By further screwing in the threaded rod 3, the sleeve 10 can be pulled out of the borehole to such an extent that the expansion lamellae 9 are no longer in the region of the undercut 19.
  • Figure 2 which shows the longitudinal section of the dismantling device of Figure 1, one of the two opposing jaws 13 can be seen.
  • the claw 2 is connected to the threaded part 1 via a weld 16.
  • the threaded part 1 can be formed together with the claw 2 as a one-piece part.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Dowels (AREA)

Abstract

To be able to disassemble again an undercut anchor which is anchored in a borehole with undercut, a disassembling device is proposed which engages on the sleeve of the undercut anchor with a claw. A threaded rod is screwed against the projecting threaded bolt of the undercut anchor, so that axial pressure is exerted on the threaded bolt, while at the same time a tensile force acts on the sleeve of the undercut anchor. <IMAGE>

Description

Die Erfindung betrifft eine Demontagevorrichtung gemäß der Gattung des Hauptanspruches.The invention relates to a dismantling device according to the preamble of the main claim.

Die Demontage von in Bohrlöcher eines Mauerwerks eingesetzten Hinterschnittankern ist bisher nicht zufriedenstellend gelöst. Derartige Hinterschnittanker besitzen einen am Bohrlochgrund aufsitzenden Spreizkörper, auf den eine Spreizhülse aufgetrieben ist, so daß die Spreizhülse in eine am Bohrlochgrund ausgebildete Hinterschneidung des Bohrloches formschlüssig eingreift. Die Demontage eines derart verankerten Hinterschnittankers ist problematisch, da die Spreizhülse im Bereich der Hinterschneidung mit der Bohrlochwandung verspannt ist.The dismantling of undercut anchors used in boreholes of masonry has not yet been satisfactorily solved. Such undercut anchors have an expanding body seated on the bottom of the borehole, onto which an expansion sleeve is driven, so that the expanding sleeve engages in a form-fitting manner in an undercut of the borehole formed on the bottom of the borehole. The disassembly of an undercut anchor anchored in this way is problematic since the expansion sleeve is braced in the area of the undercut with the borehole wall.

Der Erfindung liegt die Aufgabe zugrunde, eine Montagevorrichtung zu schaffen, die es ermöglicht, in Bohrlöcher formschlüssig verankerte Hinterschnittanker aus den Bohrlöchern zu entfernen.The invention has for its object to provide a mounting device that makes it possible to remove undercut anchors positively anchored in boreholes from the boreholes.

Die Lösung dieser Aufgabe wird durch die im Hauptanspruch angegebenen Merkmale erhalten. Die Demontagevorrichtung besitzt eine Klaue, die an der Hülse des Hinterschnittankers seitlich formschlüssig angreift. Hierfür kann an dem aus dem Bohrloch ragenden Hülsenende des Hinterschnittankers eine Ringnut vorgesehen sein, die die Klaue mit parallel verlaufenden Backen angreift. Eine Gewindestange, die durch ein Innengewindeteil eingeschraubt ist, kann nun bei der Demontage gegen den Gewindebolzen des Hinterschnittankers gedrückt werden, wobei die Gewindestange mittels eines Schraubers oder auch von Hand gedreht wird. Durch diese Drehung schraubt sich die Gewindestange durch das Innengewindeteil, so daß einerseits der Gewindebolzen in das Bohrloch hineingedrückt wird, während gleichzeitig die Klaue an der Hülse des Hinterschnittankers zieht. Versuche haben gezeigt, daß durch die Anwendung einer Druckkraft auf den Gewindebolzen bei gleichzeitiger Anwendung einer Zugkraft an der Hülse derartige Hinterschnittanker problemlos demontiert werden können.This object is achieved by the features specified in the main claim. The disassembly device has a claw which engages laterally in a form-fitting manner on the sleeve of the undercut anchor. For this purpose, an annular groove can be provided on the sleeve end of the undercut anchor protruding from the borehole, which engages the claw with parallel jaws. A threaded rod, which is screwed through an internally threaded part, can now be pressed against the threaded bolt of the undercut anchor during disassembly, the threaded rod being rotated by means of a screwdriver or also by hand. As a result of this rotation, the threaded rod screws through the internal thread part, so that on the one hand the threaded bolt is pressed into the borehole, while at the same time the claw pulls on the sleeve of the undercut anchor. Experiments have shown that such an undercut anchor can be easily removed by applying a compressive force to the threaded bolt while simultaneously applying a tensile force to the sleeve.

Das Innengewindeteil ist vorzugsweise mit einem Durchgangsgewinde versehen, so daß die Gewindestange oben mit einem profiliertem Abschnitt aus diesem Innengewindeteil herausragt. Der profilierte Abschnitt kann beispielsweise ein Sechskant sein, der in eine Bohreraufnahme eines Bohrschraubers einspannbar ist.The internal thread part is preferably provided with a through thread, so that the threaded rod protrudes at the top with a profiled section from this internal thread part. The profiled section can be a hexagon, for example, which can be clamped into a drill receptacle of a drill driver.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert.The invention is explained in more detail below with reference to an embodiment shown in the drawing.

Es zeigen:

Figur 1
eine erfindungsgemäße Montagevorrichtung mit einem in eine Bohrung eines Mauerwerks eingesetzten Hinterschnittanker und
Figur 2
den Längsschnitt der in Figur 1 dargestellten Demontagevorrichtung.
Show it:
Figure 1
a mounting device according to the invention with an undercut anchor inserted into a bore of a masonry and
Figure 2
the longitudinal section of the dismantling device shown in Figure 1.

Die in Figur 1 dargestellte Demontagevorrichtung besteht aus einem Gewindeteil 1, einer Klaue 2 und einer durch das Gewindeteil 1 geführten Gewindestange 3.The dismantling device shown in FIG. 1 consists of a threaded part 1, a claw 2 and a threaded rod 3 guided through the threaded part 1.

Die Gewindestange 3 greift mit ihrem Gewinde in ein Innengewinde 4 des Gewindeteils 1 ein und liegt mit ihrem unteren Ende 5 an einem Gewindebolzen 6 eines Hinterschnittankers 7 an. Der Gewindebolzen 6 besitzt in an sich bekannter Weise am unteren Ende einen Spreizkonus 8, auf den Spreizsegmente 9 einer Spreizhülse 10 aufgetrieben sind. Die Spreizsegmente 9 greifen formschlüssig in eine Hinterschneidung 19 des Bohrloches 11 ein. Der Spreizkonus 8 liegt am Bohrlochgrund an. Das obere Ende der Spreizhülse 10 ragt aus dem Bohrloch heraus und besitzt eine Ringnut 12, in die gegenüberliegende Backen 13 der Klaue 2 eingreifen.The threaded rod 3 engages with its thread in an internal thread 4 of the threaded part 1 and lies with its lower end 5 on a threaded bolt 6 of an undercut anchor 7. The threaded bolt 6 has, in a manner known per se, an expansion cone 8 at the lower end, onto which expansion segments 9 of an expansion sleeve 10 are driven. The expansion segments 9 positively engage in an undercut 19 of the borehole 11. The expansion cone 8 lies against the bottom of the borehole. The upper end of the expansion sleeve 10 protrudes from the borehole and has an annular groove 12 into which opposing jaws 13 of the claw 2 engage.

Am oberen freien Ende der Gewindestange 3 besitzt diese eine Profilierung 14, an der ein Bohrschrauber oder ein geeignetes Werkzeug ansetzbar ist. Wird die Gewindestange 3 gedreht, so erfährt die Gewindestange 3 dadurch eine axiale Relativbewegung bezüglich der Klaue 2. Dies bedeutet, daß durch Drehung der Gewindestange 3 diese dadurch gegen den Gewindebolzen 6 gedrückt werden kann, wodurch die Klaue 2 mit einer entsprechenden Zugkraft am oberen Ende 15 der Hülse 10 angreift. Ist die Druckkraft und die Zugkraft ausreichend groß, so bewirkt dies, daß der Konus 8 geringfügig am Bohrlochgrund in das Mauerwerk eingedrückt wird, während gleichzeitig die Hülse 10 und die mit ihr verbundenen Spreizlamellen 9 nach oben gezogen werden. Durch weiteres Eindrehen der Gewindestange 3 kann die Hülse 10 soweit aus dem Bohrloch herausgezogen werden, daß die Spreizlamellen 9 sich nicht mehr im Bereich der Hinterschneidung 19 befinden.At the upper free end of the threaded rod 3, this has a profile 14, on which a drill or a suitable tool can be attached. If the threaded rod 3 is rotated, the threaded rod 3 experiences an axial relative movement with respect to the claw 2. This means that by rotating the threaded rod 3 it can be pressed against the threaded bolt 6, whereby the claw 2 with a corresponding tensile force at the upper end 15 of the sleeve 10 attacks. If the compressive force and the tensile force are sufficiently large, this causes the cone 8 to be pressed slightly into the masonry at the bottom of the borehole, while at the same time the sleeve 10 and the expansion slats 9 connected to it are pulled upwards. By further screwing in the threaded rod 3, the sleeve 10 can be pulled out of the borehole to such an extent that the expansion lamellae 9 are no longer in the region of the undercut 19.

In Figur 2, die den Längsschnitt der Demontagevorrichtung von Figur 1 zeigt, ist einer der beiden gegenüberliegenden Backen 13 ersichtlich. Die Klaue 2 ist über eine Schweißnaht 16 mit dem Gewindeteil 1 verbunden. Selbstverständlich kann das Gewindeteil 1 zusammen mit der Klaue 2 als einstückiges Teil ausgebildet sein.In Figure 2, which shows the longitudinal section of the dismantling device of Figure 1, one of the two opposing jaws 13 can be seen. The claw 2 is connected to the threaded part 1 via a weld 16. Of course, the threaded part 1 can be formed together with the claw 2 as a one-piece part.

Claims (2)

Demontagevorrichtung für im Mauerwerk verankerte Hinterschnittanker, die an der Hülse eines Hinterschnittankers ansetzbar ist, dadurch gekennzeichnet, daß die Demontage vorrichtung eine Klaue (2) hat, die mit einem Innengewindeteil (1) verbunden ist und daß eine in das Innengewindeteil (1) eingeschraubte Gewindestange (3) in den Freiraum zwischen den beiden Backen (13) der Klaue (2) ragt.Disassembly device for undercut anchors anchored in the masonry, which can be attached to the sleeve of an undercut anchor, characterized in that the disassembly device has a claw (2) which is connected to an internally threaded part (1) and that a threaded rod screwed into the internally threaded part (1) (3) protrudes into the space between the two jaws (13) of the claw (2). Demontagevorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Innengewindeteil (1) ein Durchgangsgewinde (4) hat, an dem die Gewindestange (3) oben und unten herausragt, und daß die Gewindestange (3) an ihrem der Klaue (2) abgewandten Ende einen profilierten Abschnitt (14) hat.Disassembly device according to claim 1, characterized in that the internal thread part (1) has a through thread (4) on which the threaded rod (3) protrudes above and below, and that the threaded rod (3) has an end at its end facing away from the claw (2) has profiled section (14).
EP19900119222 1989-12-08 1990-10-06 Disassembling device Withdrawn EP0432397A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893940638 DE3940638A1 (en) 1989-12-08 1989-12-08 DISASSEMBLY DEVICE
DE3940638 1989-12-08

Publications (2)

Publication Number Publication Date
EP0432397A2 true EP0432397A2 (en) 1991-06-19
EP0432397A3 EP0432397A3 (en) 1991-10-02

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EP19900119222 Withdrawn EP0432397A3 (en) 1989-12-08 1990-10-06 Disassembling device

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DE (1) DE3940638A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1068933A3 (en) * 1999-07-14 2002-09-04 HILTI Aktiengesellschaft Disassembling device for expansion anchoring dowel
CN103170946A (en) * 2013-03-20 2013-06-26 大连奥托自动化设备有限公司 Pin puller
WO2019162058A1 (en) * 2018-02-21 2019-08-29 Fischerwerke Gmbh & Co. Kg Setting tool and setting method for bolt anchors

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19712174C2 (en) * 1997-03-22 2002-10-24 Fischer Artur Werke Gmbh Extraction tool for an expansion anchor
DE19713541A1 (en) * 1997-04-02 1998-10-08 Fischer Artur Werke Gmbh Dismantling tool for an expanding dowel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR765294A (en) * 1933-12-08 1934-06-05 Improvements to so-called <<arrache-poulie>>, <<arrache-moyeu>>, <<arrache-roulement>> devices and similar devices
FR996764A (en) * 1945-06-07 1951-12-26 Facom Manufacture Francaise De Universal extractor device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1620084A (en) * 1925-04-27 1927-03-08 Jackson Machine & Tool Company Perch puller
US4627140A (en) * 1985-04-01 1986-12-09 Drillco Devices Limited Anchor bolt setting impact tool
GB8701462D0 (en) * 1987-01-23 1987-02-25 Harris & Edgar Ltd Tool

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR765294A (en) * 1933-12-08 1934-06-05 Improvements to so-called <<arrache-poulie>>, <<arrache-moyeu>>, <<arrache-roulement>> devices and similar devices
FR996764A (en) * 1945-06-07 1951-12-26 Facom Manufacture Francaise De Universal extractor device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WESTERN ELECTRIC TECHNICAL DIGEST vol. 8171, no. 46, April 1977, G.ANNINGER, E.KOEHLER: "CONCRETE ANCHOR REMOVAL TOOL" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1068933A3 (en) * 1999-07-14 2002-09-04 HILTI Aktiengesellschaft Disassembling device for expansion anchoring dowel
CN103170946A (en) * 2013-03-20 2013-06-26 大连奥托自动化设备有限公司 Pin puller
WO2019162058A1 (en) * 2018-02-21 2019-08-29 Fischerwerke Gmbh & Co. Kg Setting tool and setting method for bolt anchors

Also Published As

Publication number Publication date
DE3940638A1 (en) 1991-06-13
EP0432397A3 (en) 1991-10-02

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