EP0302202A2 - Device for attaching fasteners - Google Patents

Device for attaching fasteners Download PDF

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Publication number
EP0302202A2
EP0302202A2 EP88109506A EP88109506A EP0302202A2 EP 0302202 A2 EP0302202 A2 EP 0302202A2 EP 88109506 A EP88109506 A EP 88109506A EP 88109506 A EP88109506 A EP 88109506A EP 0302202 A2 EP0302202 A2 EP 0302202A2
Authority
EP
European Patent Office
Prior art keywords
drill
intermediate piece
shaft
receptacle
fastening element
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Withdrawn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
EP88109506A
Other languages
German (de)
French (fr)
Other versions
EP0302202A3 (en
Inventor
Artur Prof. Dr. H.C. Fischer
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 EP0302202A2 publication Critical patent/EP0302202A2/en
Publication of EP0302202A3 publication Critical patent/EP0302202A3/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/007—Attachments for drilling apparatus for screw or nut setting or loosening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/005—Attachments or adapters placed between tool and hammer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F3/00—Associations of tools for different working operations with one portable power-drive means; Adapters therefor

Definitions

  • the invention relates to a device for fixing fasteners according to the preamble of the main claim.
  • fastening elements For use in undercut boreholes, fastening elements are used which have an expansion element at their end inserted into the borehole, which is expanded by an expansion body in the region of the undercut of the borehole.
  • the expansion body can be designed as an expansion cone that can be drawn into the sleeve-shaped expansion element during the expansion process by rotating the shaft of the fastening element.
  • the expansion body can be connected to the shaft of the fastening element via a threaded rod and have an anti-rotation lock acting on the bottom of the borehole, so that when the shaft rotates, the expansion body does not rotate and is drawn into the expansion sleeve. This expands the expansion sleeve and engages in the undercut of the borehole.
  • Such a fastener is described in German patent application P 37 19 798.3.
  • the fastening element In order to fix such a fastening element in a borehole, the fastening element previously had to be driven into the borehole and then the expansion cone had to be drawn into the expansion sleeve by rotating the shaft with a suitable tool. Different tools were therefore required to create the borehole, to insert and anchor the fastening element.
  • the invention has for its object to provide a device for fixing fasteners that can be used in undercut boreholes, which allows fast fixing of the fasteners using a drilling device.
  • the device designed as an intermediate piece represents a rotationally fixed connection between the shaft of the fastening element and the drill inserted into a drilling machine, so that the torque emanating from the drill acts on the shaft of the fastening element via the intermediate piece.
  • a machine with a striking mechanism is preferably used as the drilling machine, so that the strikes transmitted from the striking mechanism to the intermediate piece also act on the shaft end of the fastening element and quickly drive it into the borehole down to the bottom of the borehole while rotating.
  • the expansion cone is now drawn into the expansion element as a result of the torque acting on the shaft of the fastening element, so that it expands in the region of the undercut.
  • the fastener is thus positively fixed in the borehole.
  • a further development of the invention provides that the drill tip forms an at least partially flattened end face which bears against a correspondingly flattened stop in the intermediate piece.
  • the intermediate piece can be designed as a sleeve which partially surrounds the drill shaft, so that the shaft of the drill thereby forms a guide for the intermediate piece.
  • the centering tube present on the drilling bell which largely surrounds the drill shaft, can engage in a corresponding inner bore of the intermediate piece and thus serve as a guide for the intermediate piece.
  • the intermediate piece in the area of the receptacle provided for the drill with slots or grooves in which the cutting edge of the drill tip engages laterally.
  • the drill shaft can be smooth and the drill tip can be formed by a hard metal cutting tool inserted at the end of the drill, which protrudes laterally on the shaft.
  • the cutting edge then preferably engages in the slots provided on the intermediate piece and thus transmits the torque emanating from the drill to the intermediate piece.
  • the second receptacle on the intermediate piece in which the end of the shaft of the fastening element engages, also forms a rotationally fixed connection between the fastening element and the intermediate piece.
  • an internal hexagon is provided on the intermediate piece, in which a corresponding hexagon which projects at the shaft end of the fastening element positively engages.
  • the second receptacle is a groove with an inwardly curved groove base into which a square formed on the shaft of the fastening element engages with an outwardly curved end face. The placement of the intermediate piece is particularly facilitated by this measure and the domed contact surfaces achieve an automatic centering between the fastening element and the intermediate piece.
  • the form-fitting connection between the shaft of the fastening element and the intermediate piece can ensure, by appropriately selected depth of this receptacle or by suitable shaping, that the connection in the region of the second receptacle is released at the end of the expansion process and the sudden increase in torque associated therewith.
  • a deformable intermediate ring can be arranged between the spreading element and the shaft of the fastening element value deforms.
  • this intermediate ring can consist of a more or less hard plastic material and have a width corresponding to the respective requirements.
  • FIG. 2 shows a device according to the invention, which is placed as an intermediate piece 1 on a centering tube 2 of a drilling bell 3.
  • the drill tip 4 protrudes from the centering tube 2 and engages with a laterally protruding cutting edge 5 in the lateral slots 6 of the intermediate piece 1.
  • An enlarged bore 7, into which the centering tube 2 is inserted, and the slots 6 form a first receptacle 8 for the drill 9.
  • a second receptacle 10 is located on the other side of the intermediate piece 1 and forms the connection to a fastening element, as shown in FIG. 2.
  • the receptacle 10 is designed as a groove 11 with an inwardly curved groove base 12. The purpose of this curvature is that the shaft end of the fastening element resting against it is automatically centered.
  • FIG. 1 one is connected to the drill 9 above the drilling bell 3 whose shaft 13 can be seen, which can be inserted into the chuck of a drilling machine.
  • a hose 14 extending laterally from the drilling bell 3 serves to suck off the drilling dust when creating a borehole in a masonry.
  • the intermediate piece 15 shown in FIG. 2 has a bore in the area of its first receptacle 16 with an inner diameter which is adapted to the shaft diameter of the drill 17.
  • the drill 17, like the drill 9 shown in FIG. 1, can also have laterally projecting cutting edges 5 which engage in corresponding slots 18 on the intermediate piece 15.
  • the drill 17 has a partially flattened end face 19 which bears against a corresponding stop 20 of the intermediate piece 15.
  • the second receptacle 21 is formed in this intermediate piece 15 as in the intermediate piece 1 shown in Figure 1.
  • a square 24, which engages in the receptacle 21, is formed on the shaft end of a fastening element 23 protruding from the borehole 22.
  • the end face of the square 24 has a curvature which is adapted to the curvature of the groove base 12 (FIG. 1).
  • the fastening element 23 has an expansion body 25, an expansion element 26 designed as an expansion sleeve, a shaft 27 and an intermediate ring 28 arranged between the shaft 27 and the expansion element 26.
  • the expansion cone 25 is connected to the shaft 27 via a thread 29. As soon as the expansion cone 25 with its end-side anti-rotation device 30 comes into contact with the bottom of the borehole 31, further rotation of the shaft 27 causes the expansion cone 25 to be drawn into the expansion element 26 and this spreads it out. If the maximum spreading effect is reached, the pressure on the intermediate ring 28 increases, which deforms when the pressure is correspondingly high, thereby limiting or damping the increase in torque.
  • FIG. 3 shows the sectional plane of the intermediate piece 15 running through the slots 18.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling And Boring (AREA)
  • Portable Power Tools In General (AREA)

Abstract

For attaching fasteners which can be inserted into undercut drill holes and have an expanding element capable of expansion by rotating its shank, it has been necessary hitherto to use special tools for fixing in the drill hole. For attaching the fasteners, an intermediate piece is proposed, which can be mounted on the drill of a drilling machine and transmits the torque from the drill to the fastener. Using a percussion drilling machine, it is thus possible to fix such fasteners very simply and quickly in drill holes with undercuts. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Festsetzen von Befesti­gungselementen gemäß der Gattung des Hauptanspruchs.The invention relates to a device for fixing fasteners according to the preamble of the main claim.

Für den Einsatz in hinterschnittenen Bohrlöchern werden Befestigungs­elemente verwendet, die an ihrem in das Bohrloch eingesetzten Ende ein Spreizelement besitzen, welches von einem Spreizkörper im Bereich der Hinterschneidung des Bohrlochs aufgespreizt wird. Der Spreizkörper kann dabei als Spreizkonus ausgebildet sein, der in das hülsenförmige Spreiz­element beim Spreizvorgang durch Drehung am Schaft des Befestigungsele­mentes einziehbar ist. Zu diesem Zweck kann der Spreizkörper über ei­nen Gewindestab mit dem Schaft des Befestigungselementes verbunden sein und eine am Bohrlochgrund angreifende Drehsicherung besitzen, so daß bei Drehung des Schaftes sich der Spreizkörper nicht mitdreht und in die Spreizhülse eingezogen wird. Die Spreizhülse weitet sich dadurch auf und greift in die Hinterschneidung des Bohrloches ein. Ein derar­tiges Befestigungselement ist in der deutschen Patentanmeldung P 37 19 798.3 näher beschrieben.For use in undercut boreholes, fastening elements are used which have an expansion element at their end inserted into the borehole, which is expanded by an expansion body in the region of the undercut of the borehole. The expansion body can be designed as an expansion cone that can be drawn into the sleeve-shaped expansion element during the expansion process by rotating the shaft of the fastening element. For this purpose, the expansion body can be connected to the shaft of the fastening element via a threaded rod and have an anti-rotation lock acting on the bottom of the borehole, so that when the shaft rotates, the expansion body does not rotate and is drawn into the expansion sleeve. This expands the expansion sleeve and engages in the undercut of the borehole. Such a fastener is described in German patent application P 37 19 798.3.

Um ein derartiges Befestigungselement in einem Bohrloch festzusetzen, mußte bisher zunächst das Befestigungselement in das Bohrloch einge­trieben werden und dann durch Drehung des Schaftes mit einem geeigne­ten Werkzeug der Spreizkonus in die Spreizhülse eingezogen werden. Es waren somit unterschiedliche Werkzeuge für die Erstellung des Bohr­lochs, für das Einsetzen und für das Verankern des Befestigungsele­mentes erforderlich.In order to fix such a fastening element in a borehole, the fastening element previously had to be driven into the borehole and then the expansion cone had to be drawn into the expansion sleeve by rotating the shaft with a suitable tool. Different tools were therefore required to create the borehole, to insert and anchor the fastening element.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Fest­setzen von Befestigungselementen, die in hinterschnittene Bohrlöcher einsetzbar sind, zu schaffen, die unter Verwendung einer Bohrvorrich­tung ein schnelles Festsetzen der Befestigungselemente ermöglicht.The invention has for its object to provide a device for fixing fasteners that can be used in undercut boreholes, which allows fast fixing of the fasteners using a drilling device.

Die Lösung dieser Aufgabe wird bei einer Vorrichtung der eingangs ge­nannten Gattung durch die im Hauptanspruch angegebenen Merkmale erhal­ten. Die als Zwischenstück ausgebildete Vorrichtung stellt eine dreh­feste Verbindung zwischen Schaft des Befestigungselementes und dem in eine Bohrmaschine eingesetzten Bohrer dar, so daß das vom Bohrer aus­gehende Drehmoment über das Zwischenstück am Schaft des Befestigungs­elementes angreift. Als Bohrmaschine wird vorzugsweise eine Maschine mit Schlagwerk verwendet, so daß die vom Schlagwerk auf das Zwischen­stück übertragenen Schläge auch auf das Schaftende des Befestigungs­elementes wirken und dieses bei gleichzeitiger Drehung in das Bohr­loch bis zum Bohrlochgrund schnell eintreiben. Bei Anlage des Befes­tigungselementes am Bohrlochgrund wird nun infolge des am Schaft des Befestigungselementes angreifenden Drehmoments der Spreizkonus in das Spreizelement eingezogen, so daß dieses im Bereich der Hinterschnei­dung aufspreizt. Das Befestigungselement ist damit im Bohrloch form­schlüssig festgesetzt.This object is achieved in a device of the type mentioned by the features specified in the main claim. The device designed as an intermediate piece represents a rotationally fixed connection between the shaft of the fastening element and the drill inserted into a drilling machine, so that the torque emanating from the drill acts on the shaft of the fastening element via the intermediate piece. A machine with a striking mechanism is preferably used as the drilling machine, so that the strikes transmitted from the striking mechanism to the intermediate piece also act on the shaft end of the fastening element and quickly drive it into the borehole down to the bottom of the borehole while rotating. When the fastening element lies against the bottom of the borehole, the expansion cone is now drawn into the expansion element as a result of the torque acting on the shaft of the fastening element, so that it expands in the region of the undercut. The fastener is thus positively fixed in the borehole.

Um die vom Schlagwerk der Bohrmaschine ausgeübten Schläge gut vom Boh­rer auf das Zwischenstück übertragen zu können, sieht eine Weiterbil­dung der Erfindung vor, daß die Bohrerspitze eine wenigstens teilweise abgeflachte Stirnseite bildet, die an einem entsprechend abgeflachten Anschlag in dem Zwischenstück anliegt.In order to be able to transmit the blows exerted by the hammer mechanism of the drilling machine well from the drill to the intermediate piece, a further development of the invention provides that the drill tip forms an at least partially flattened end face which bears against a correspondingly flattened stop in the intermediate piece.

Das Zwischenstück kann als Hülse ausgebildet sein, welche den Bohrer­schaft teilweise umschließt, so daß dadurch der Schaft des Bohrers ei­ne Führung für das Zwischenstück bildet.The intermediate piece can be designed as a sleeve which partially surrounds the drill shaft, so that the shaft of the drill thereby forms a guide for the intermediate piece.

Wird als Bohrvorrichtung eine Bohrmaschine mit Bohrglocke verwendet, so kann das an der Bohrglocke vorhandene Zentrierrohr, welches den Bohrerschaft weitgehend umschließt, in eine entsprechende Innenboh­rung des Zwischenstücks eingreifen und somit als Führung für das Zwischenstück dienen.If a drilling machine with a drilling bell is used as the drilling device, the centering tube present on the drilling bell, which largely surrounds the drill shaft, can engage in a corresponding inner bore of the intermediate piece and thus serve as a guide for the intermediate piece.

Um die erforderliche Drehmomentübertragung zwischen Bohrer und Zwischen­ stück zu ermöglichen, ist es besonders vorteilhaft, das Zwischenstück im Bereich der für den Bohrer vorgesehenen Aufnahme mit Schlitzen oder Nuten zu versehen, in die die Schneide der Bohrerspitze seitlich ein­greift. Bei Verwendung einer Bohrglocke mit Absaugvorrichtung kann der Bohrerschaft glatt sein und die Bohrspitze von einem am Ende des Boh­rers eingesetzten Hartmetallschneidling, der seitlich am Schaft über­steht, gebildet werden. Der Schneidling greift dann vorzugsweise in am Zwischenstück vorgesehene Schlitze ein und überträgt somit das vom Bohrer ausgehende Drehmoment auf das Zwischenstück.To the required torque transmission between drill and intermediate To enable piece, it is particularly advantageous to provide the intermediate piece in the area of the receptacle provided for the drill with slots or grooves in which the cutting edge of the drill tip engages laterally. When using a drilling bell with a suction device, the drill shaft can be smooth and the drill tip can be formed by a hard metal cutting tool inserted at the end of the drill, which protrudes laterally on the shaft. The cutting edge then preferably engages in the slots provided on the intermediate piece and thus transmits the torque emanating from the drill to the intermediate piece.

Die zweite Aufnahme am Zwischenstück, in die das Ende des Schaftes des Befestigungselementes eingreift, bildet ebenfalls eine drehfeste Ver­bindung zwischen Befestigungselement und Zwischenstück. Hierfür kann vorgesehen sein, daß am Zwischenstück beispielsweise ein Innensechs­kant vorgesehen ist, in den ein entsprechender am Schaftende des Be­festigungselementes vorspringender Sechskant formschlüssig eingreift. Die bevorzugte Ausführungsform sieht jedoch vor, daß die zweite Auf­nahme eine Nut mit nach innen gewölbtem Nutengrund ist, in die ein am Schaft des Befestigungselementes ausgebildeter Vierkant mit nach außen gewölbter Stirnfläche eingreift. Das Aufsetzen des Zwischenstücks wird durch diese Maßnahme besonders erleichtert und durch die gewölbten An­lageflächen wird eine selbsttätige Zentrierung zwischen Befestigungs­element und Zwischenstück erreicht.The second receptacle on the intermediate piece, in which the end of the shaft of the fastening element engages, also forms a rotationally fixed connection between the fastening element and the intermediate piece. For this purpose it can be provided that, for example, an internal hexagon is provided on the intermediate piece, in which a corresponding hexagon which projects at the shaft end of the fastening element positively engages. The preferred embodiment provides, however, that the second receptacle is a groove with an inwardly curved groove base into which a square formed on the shaft of the fastening element engages with an outwardly curved end face. The placement of the intermediate piece is particularly facilitated by this measure and the domed contact surfaces achieve an automatic centering between the fastening element and the intermediate piece.

Die formschlüssige Verbindung zwischen Schaft des Befestigungselemen­tes und dem Zwischenstück kann durch entsprechend gewählte Tiefe die­ser Aufnahme oder durch geeignete Formgebung sicherstellen, daß am Ende des Spreizvorganges und dem damit verbundenen plötzlichen Dreh­momentanstieg die Verbindung im Bereich der zweiten Aufnahme gelöst wird. Um bei Beendigung des Spreizvorganges eine Dämpfung des Dreh­momentanstieges zu erreichen, kann zwischen dem Spreizelement und dem Schaft des Befestigungselements ein verformbarer Zwischenring an­geordnet werden, der bei Überschreiten eines bestimmten Drehmoment­ wertes sich verformt. Je nach Anwendungsfall kann dieser Zwischen­ring aus einem mehr oder weniger harten Kunststoffmaterial bestehen und eine den jeweiligen Anforderungen entsprechende Breite haben.The form-fitting connection between the shaft of the fastening element and the intermediate piece can ensure, by appropriately selected depth of this receptacle or by suitable shaping, that the connection in the region of the second receptacle is released at the end of the expansion process and the sudden increase in torque associated therewith. In order to achieve a damping of the torque increase when the spreading process is completed, a deformable intermediate ring can be arranged between the spreading element and the shaft of the fastening element value deforms. Depending on the application, this intermediate ring can consist of a more or less hard plastic material and have a width corresponding to the respective requirements.

Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert.The invention is explained below with reference to the drawing.

Es zeigen:

  • Figur 1 eine erfindungsgemäße Vorrichtung im Schnitt, die auf eine Bohrglocke aufgesetzt ist,
  • Figur 2 eine weitere Ausführungsform einer erfindungsge­mäßen Vorrichtung, die als Zwischenstück zwischen Bohrer und einem festzusetzenden Befestigungsele­ment eingesetzt ist und
  • Figur 3 das in Figur 2 dargestellte Zwischenstück im Schnitt.
Show it:
  • 1 shows a device according to the invention in section, which is placed on a drilling bell,
  • Figure 2 shows another embodiment of a device according to the invention, which is used as an intermediate piece between the drill and a fastening element to be fixed and
  • Figure 3 shows the intermediate piece shown in Figure 2 in section.

In Figur 2 ist eine erfindungsgemäße Vorrichtung, die als Zwischenstück 1 auf ein Zentrierrohr 2 einer Bohrglocke 3 aufgesetzt ist, dargestellt. Aus dem Zentrierrohr 2 ragt die Bohrerspitze 4 heraus und greift mit ei­ner seitlich überstehenden Schneide 5 in seitliche Schlitze 6 des Zwi­schenstücks 1 ein. Eine erweiterte Bohrung 7, in die das Zentrierrohr 2 eingesetzt ist, und die Schlitze 6 bilden eine erste Aufnahme 8 für den Bohrer 9.FIG. 2 shows a device according to the invention, which is placed as an intermediate piece 1 on a centering tube 2 of a drilling bell 3. The drill tip 4 protrudes from the centering tube 2 and engages with a laterally protruding cutting edge 5 in the lateral slots 6 of the intermediate piece 1. An enlarged bore 7, into which the centering tube 2 is inserted, and the slots 6 form a first receptacle 8 for the drill 9.

Eine zweite Aufnahme 10 befindet sich auf der anderen Seite des Zwi­schenstücks 1 und bildet die Verbindung zu einem Befestigungselement, wie es in Figur 2 dargestellt ist. Die Aufnahme 10 ist als Nut 11 mit einem nach innen gewölbten Nutengrund 12 ausgebildet. Diese Wölbung hat den Zweck, daß das an ihr anliegende Schaftende des Befestigungs­elementes selbsttätig zentriert wird.A second receptacle 10 is located on the other side of the intermediate piece 1 and forms the connection to a fastening element, as shown in FIG. 2. The receptacle 10 is designed as a groove 11 with an inwardly curved groove base 12. The purpose of this curvature is that the shaft end of the fastening element resting against it is automatically centered.

In Figur 1 ist oberhalb der Bohrglocke 3 ein mit dem Bohrer 9 verbun­ dener Schaft 13 ersichtlich, der in das Spannfutter einer Bohrmaschine einsetzbar ist. Ein seitlich von der Bohrglocke 3 abgehender Schlauch 14 dient zum Absaugen des Bohrmehls bei der Erstellung eines Bohrlochs in einem Mauerwerk. Beim Festsetzen des Befestigungselementes in einem bereits bestehenden Bohrloch mit Hinterschneidung ist eine Absaugvor­richtung nicht erforderlich, jedoch kann durch das in Figur 1 darge­stellte Zwischenstück die Bohrmaschine mit Absaugvorrichtung ohne Um­baumaßnahmen zum Festsetzen des Befestigungselementes verwendet werden.In FIG. 1, one is connected to the drill 9 above the drilling bell 3 whose shaft 13 can be seen, which can be inserted into the chuck of a drilling machine. A hose 14 extending laterally from the drilling bell 3 serves to suck off the drilling dust when creating a borehole in a masonry. When the fastening element is fixed in an already existing borehole with an undercut, a suction device is not necessary, however, the drill with suction device can be used to fix the fastening element through the intermediate piece shown in FIG. 1 without conversion measures.

Das in Figur 2 dargestellte Zwischenstück 15 besitzt im Bereich seiner ersten Aufnahme 16 eine Bohrung mit einem Innendurchmesser, der an den Schaftdurchmesser des Bohrers 17 angepaßt ist. Der Bohrer 17 kann eben­falls wie der in Figur 1 dargestellte Bohrer 9 seitlich überstehende Schneiden 5 haben, die in entsprechende Schlitze 18 am Zwischenstück 15 eingreifen. Um eine gute Anlagefläche zur Übertragung der von einer Schlagbohrmaschine ausgehenden Schläge zu gewährleisten, besitzt der Bohrer 17 eine teilweise abgeflachte Stirnseite 19, die an einem ent­sprechenden Anschlag 20 des Zwischenstücks 15 anliegt.The intermediate piece 15 shown in FIG. 2 has a bore in the area of its first receptacle 16 with an inner diameter which is adapted to the shaft diameter of the drill 17. The drill 17, like the drill 9 shown in FIG. 1, can also have laterally projecting cutting edges 5 which engage in corresponding slots 18 on the intermediate piece 15. In order to ensure a good contact surface for the transmission of the blows emanating from an impact drill, the drill 17 has a partially flattened end face 19 which bears against a corresponding stop 20 of the intermediate piece 15.

Die zweite Aufnahme 21 ist bei diesem Zwischenstück 15 wie bei dem in Figur 1 dargestellten Zwischenstück 1 ausgebildet. Am aus dem Bohrloch 22 herausragenden Schaftende eines Befestigungselementes 23 ist ein Vierkant 24 angeformt, der in die Aufnahme 21 eingreift. Die Stirn­fläche des Vierkantes 24 besitzt eine an die Wölbung des Nutengrun­des 12 (Figur 1) angepaßte Wölbung.The second receptacle 21 is formed in this intermediate piece 15 as in the intermediate piece 1 shown in Figure 1. A square 24, which engages in the receptacle 21, is formed on the shaft end of a fastening element 23 protruding from the borehole 22. The end face of the square 24 has a curvature which is adapted to the curvature of the groove base 12 (FIG. 1).

Das Befestigungselement 23 besitzt einen Spreizkörper 25, ein als Spreizhülse ausgebildetes Spreizelement 26, einen Schaft 27 und einen zwischen Schaft 27 und Spreizelement 26 angeordneten Zwischenring 28. Der Spreizkonus 25 ist über ein Gewinde 29 mit dem Schaft 27 verbunden. Sobald der Spreizkonus 25 mit seiner stirnseitigen Drehsicherung 30 am Bohrlochgrund 31 zur Anlage kommt, bewirkt ein Weiterdrehen des Schaf­tes 27, daß der Spreizkonus 25 in das Spreizelement 26 eingezogen wird und dieses dadurch aufspreizt. Ist die maximale Spreizwirkung erreicht, erhöht sich der Druck auf den Zwischenring 28, der bei entsprechend großem Druck sich verformt und dadurch eine Begrenzung bzw. eine Dämp­fung des Drehmomentanstiegs bewirkt.The fastening element 23 has an expansion body 25, an expansion element 26 designed as an expansion sleeve, a shaft 27 and an intermediate ring 28 arranged between the shaft 27 and the expansion element 26. The expansion cone 25 is connected to the shaft 27 via a thread 29. As soon as the expansion cone 25 with its end-side anti-rotation device 30 comes into contact with the bottom of the borehole 31, further rotation of the shaft 27 causes the expansion cone 25 to be drawn into the expansion element 26 and this spreads it out. If the maximum spreading effect is reached, the pressure on the intermediate ring 28 increases, which deforms when the pressure is correspondingly high, thereby limiting or damping the increase in torque.

In Figur 3 ist die durch die Schlitze 18 verlaufende Schnittebene des Zwischenstücks 15 dargestellt.FIG. 3 shows the sectional plane of the intermediate piece 15 running through the slots 18.

Claims (7)

1. Vorrichtung zum Festsetzen von Befestigungselementen, die in hin­terschnittene Bohrlöcher einsetzbar sind und ein durch Drehung ihres Schaftes in der Bohrlochhinterschneidung aufspreizbares Spreizelement haben, dadurch gekennzeichnet, daß die Vorrichtung ein Zwischenstück (1,15) ist, welches einer­seits eine erste Aufnahme (8, 16) für die Bohrerspitze (4) eines von einer Bohrmaschine angetriebenen Bohrers (9, 17) und anderer­seits eine zweite Aufnahme (10, 21) für das Schaftende des Befesti­gungselements (23) hat, und daß über das Zwischenstück (1, 15) eine drehfeste Verbindung zwischen Bohrer (9, 17) und Schaft (27) des Befestigungselementes (23) besteht.1. Device for fixing fastening elements which can be inserted into undercut boreholes and have an expanding element which can be expanded by rotating their shank in the undercut in the borehole, characterized in that the device is an intermediate piece (1, 15) which, on the one hand, has a first receptacle (8, 16) for the drill tip (4) of a drill driven by a drill (9, 17) and on the other hand has a second receptacle (10, 21) for the shaft end of the fastening element (23), and that via the intermediate piece (1, 15) one there is a rotationally fixed connection between the drill (9, 17) and the shaft (27) of the fastening element (23). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeich­net, daß die Bohrerspitze (4) eine wenigstens teilweise abge­flachte Stirnseite (19) bildet, die an einem entsprechend abge­flachten Anschlag (20) in dem Zwischenstück (15) anliegt.2. Device according to claim 1, characterized in that the drill tip (4) forms an at least partially flattened end face (19) which bears against a correspondingly flattened stop (20) in the intermediate piece (15). 3. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß das Zwischenstück (1, 15) als eine den Bohrer (9, 17) teilweise umschließende Hülse ausgebil­det ist.3. Device according to one of claims 1 or 2, characterized in that the intermediate piece (1, 15) is designed as a sleeve partially enclosing the drill (9, 17). 4. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Zwischenstück (1) im Bereich der ersten Aufnahme (8) eine Innenbohrung (7) hat, in die ein zur Bohrvorrichtung gehörendes, den Bohrer (9) umschließendes Zen­trierrohr (2) einsetzbar ist.4. Device according to one of the preceding claims, characterized in that the intermediate piece (1) in the region of the first receptacle (8) has an inner bore (7) into which a centering tube (2) which belongs to the drilling device and surrounds the drill (9). can be used. 5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß im Bereich der ersten Aufnahme (8, 16) das Zwischenstück (1, 15) Schlitze (6, 18) oder Nuten hat, in die die Schneide (5) der Bohrerspitze (4) eingreift.5. Device according to one of the preceding claims, characterized in that in the region of the first receptacle (8, 16) the intermediate piece (1, 15) has slots (6, 18) or grooves into which the cutting edge (5) of the drill tip ( 4) intervenes. 6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die zweite Aufnahme (10, 21) ei­ne Nut (11) mit nach innen gewölbtem Nutengrund (12) ist, in die ein am Schaft (27) des Befestigungselementes (23) ausgebildeter Vierkant (24) mit nach außen gewölbter Stirnfläche eingreift.6. Device according to one of the preceding claims, characterized in that the second receptacle (10, 21) is a groove (11) with an inwardly curved groove base (12) into which a formed on the shaft (27) of the fastening element (23) Square (24) engages with an outwardly curved end face. 7. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß am Befestigungselement (23) zwi­schen Spreizelement (26) und Schaft (27) ein verformbarer Zwischen­ring (28) zur Drehmomentbegrenzung und/oder zur Dämpfung bei maxi­maler Spreizung des Spreizelements (26) eingesetzt ist.7. Device according to one of the preceding claims, characterized in that on the fastening element (23) between the expansion element (26) and the shaft (27) a deformable intermediate ring (28) for torque limitation and / or for damping at maximum spreading of the expansion element (26) is used is.
EP88109506A 1987-08-07 1988-06-15 Device for attaching fasteners Withdrawn EP0302202A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873726306 DE3726306A1 (en) 1987-08-07 1987-08-07 DEVICE FOR FIXING FASTENERS
DE3726306 1987-08-07

Publications (2)

Publication Number Publication Date
EP0302202A2 true EP0302202A2 (en) 1989-02-08
EP0302202A3 EP0302202A3 (en) 1990-04-18

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ID=6333287

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EP88109506A Withdrawn EP0302202A3 (en) 1987-08-07 1988-06-15 Device for attaching fasteners

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Country Link
EP (1) EP0302202A3 (en)
JP (1) JPS6451276A (en)
BR (1) BR8803907A (en)
DE (1) DE3726306A1 (en)
DK (1) DK365588A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0416182A1 (en) * 1989-09-08 1991-03-13 Kabushiki Kaisha Miyanaga Driving mechanism for anchor
EP0426918A1 (en) * 1989-11-09 1991-05-15 Louis N. Giannuzzi Automatic setting tool for masonry anchors
EP0836913A1 (en) * 1996-10-16 1998-04-22 DreBo Werkzeugfabrik GmbH Bit adapter
US7188690B2 (en) 2003-03-13 2007-03-13 Paul Geuvers Drilling device and method for producing undercut holes
EP3048096A1 (en) 2015-01-22 2016-07-27 Evonik Degussa GmbH Synthesis of triacetone diamine compounds by means of reductive amination based on triacetone diamine and its derivatives
EP3266766A1 (en) 2016-07-07 2018-01-10 Evonik Degussa GmbH Synthesis of triacetone diamine compounds by means of reductive amination based on triacetone diamine and its derivatives
EP3660001A1 (en) 2018-11-27 2020-06-03 Evonik Operations GmbH Improved method for preparing triacetone diamine and its derivatives

Families Citing this family (4)

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DE3914881A1 (en) * 1989-05-05 1990-11-08 Fischer Artur Werke Gmbh MOUNTING UNIT WITH A SPREADING ANCHOR AND A MOUNTING TOOL
JP2763061B2 (en) * 1992-11-24 1998-06-11 矢崎総業株式会社 Low insertion / extraction force connector
AUPS315002A0 (en) * 2002-06-25 2002-07-18 Resmed Limited Method & apparatus for control of appliance coupler retention and withdrawal forces
JP4925338B2 (en) * 2007-11-29 2012-04-25 株式会社ニフコ Bonding identification mechanism

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DE2150572A1 (en) * 1971-10-11 1973-04-19 Willi Schober EXPANSION DOWEL
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US4218795A (en) * 1979-03-07 1980-08-26 Illinois Tool Works Inc. Drill bit with fastener-driving collar assembly
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DE2845107C2 (en) * 1978-10-17 1982-09-09 Fischer, Artur, Dr.H.C., 7244 Waldachtal Method for introducing an adhesive into a borehole
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DE2150572A1 (en) * 1971-10-11 1973-04-19 Willi Schober EXPANSION DOWEL
DE2509961A1 (en) * 1975-03-07 1976-09-16 Arthur Fischer Screw driver attachment for power drill - has drill helix located in projections in hollow drive blade over wall plug
US4218795A (en) * 1979-03-07 1980-08-26 Illinois Tool Works Inc. Drill bit with fastener-driving collar assembly
DE3023411A1 (en) * 1980-06-23 1982-01-14 Werkzeugfabrik Fritz Mächtle GmbH & Co KG, 7015 Korntal High load wall anchor with spreading sleeve - has spacer with support strip between sleeve faces, bridging yieldable spacer axial length
EP0086352A2 (en) * 1982-02-12 1983-08-24 Wera-Werk Hermann Werner GmbH &amp; Co. Screwing head
GB2122933A (en) * 1982-07-02 1984-01-25 Upat Max Langensiepen Kg Setting tool for driving in a threaded rod

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0416182A1 (en) * 1989-09-08 1991-03-13 Kabushiki Kaisha Miyanaga Driving mechanism for anchor
US5050286A (en) * 1989-09-08 1991-09-24 Kabushiki Kaisha Miyanaga Driving mechanism for anchor
EP0426918A1 (en) * 1989-11-09 1991-05-15 Louis N. Giannuzzi Automatic setting tool for masonry anchors
EP0836913A1 (en) * 1996-10-16 1998-04-22 DreBo Werkzeugfabrik GmbH Bit adapter
US7188690B2 (en) 2003-03-13 2007-03-13 Paul Geuvers Drilling device and method for producing undercut holes
EP3048096A1 (en) 2015-01-22 2016-07-27 Evonik Degussa GmbH Synthesis of triacetone diamine compounds by means of reductive amination based on triacetone diamine and its derivatives
EP3266766A1 (en) 2016-07-07 2018-01-10 Evonik Degussa GmbH Synthesis of triacetone diamine compounds by means of reductive amination based on triacetone diamine and its derivatives
DE102016212378A1 (en) 2016-07-07 2018-01-11 Evonik Degussa Gmbh Synthesis of triacetonediamine compounds by reductive amination starting from triacetonediamine and its derivatives
EP3660001A1 (en) 2018-11-27 2020-06-03 Evonik Operations GmbH Improved method for preparing triacetone diamine and its derivatives
WO2020108980A1 (en) 2018-11-27 2020-06-04 Evonik Operations Gmbh Improved method for producing triacetondiamine and the derivatives thereof

Also Published As

Publication number Publication date
DK365588A (en) 1989-02-08
DE3726306A1 (en) 1989-02-16
DK365588D0 (en) 1988-07-01
BR8803907A (en) 1989-02-28
EP0302202A3 (en) 1990-04-18
JPS6451276A (en) 1989-02-27

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