EP0499580B1 - Ausziehwerkzeug - Google Patents

Ausziehwerkzeug Download PDF

Info

Publication number
EP0499580B1
EP0499580B1 EP92810071A EP92810071A EP0499580B1 EP 0499580 B1 EP0499580 B1 EP 0499580B1 EP 92810071 A EP92810071 A EP 92810071A EP 92810071 A EP92810071 A EP 92810071A EP 0499580 B1 EP0499580 B1 EP 0499580B1
Authority
EP
European Patent Office
Prior art keywords
thread
external thread
extraction tool
outside thread
anchor bolt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92810071A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0499580A3 (en
EP0499580A2 (de
Inventor
Antonius Winkeljann
Franz Popp
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP0499580A2 publication Critical patent/EP0499580A2/de
Publication of EP0499580A3 publication Critical patent/EP0499580A3/de
Application granted granted Critical
Publication of EP0499580B1 publication Critical patent/EP0499580B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53796—Puller or pusher means, contained force multiplying operator
    • Y10T29/53839—Puller or pusher means, contained force multiplying operator having percussion or explosive operator
    • Y10T29/53843—Tube, sleeve, or ferrule inserting or removing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53796—Puller or pusher means, contained force multiplying operator
    • Y10T29/53848—Puller or pusher means, contained force multiplying operator having screw operator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53796—Puller or pusher means, contained force multiplying operator
    • Y10T29/53848—Puller or pusher means, contained force multiplying operator having screw operator
    • Y10T29/53857—Central screw, work-engagers around screw
    • Y10T29/53878—Tubular or tube segment forms work-engager
    • Y10T29/53883—Screw threaded work-engager

Definitions

  • the invention relates to a pull-out tool for sleeve-shaped objects located in a component, with a shaft which has a conical external thread tapering towards the free end and carries an attacking means at the other end. and also has a central, longitudinally extending through bore which carries an internal thread in the area of the external thread, the axial extent of which corresponds essentially to the axial extent of the external thread, cf. eg US-A-1 382 835.
  • the large wall thickness between the internal and external threads results in a large circular end face in the front area.
  • a screw unscrewing tool which has a thread with a very large pitch at one end and is provided with an attacking means at the other end, which consists of four ground surfaces, each offset by 90 ° to one another.
  • This commercially available boring tool is particularly suitable for removing broken parts with an external thread from threaded holes. Since this known screw boring tool is made of solid material, the application possibilities are restricted.
  • the invention has for its object to provide a pull-out tool with which an expansion sleeve can be removed despite an anchor bolt passing through it.
  • the object is achieved in that the internal thread and the external thread converge towards the free end, the wall thickness remaining between the internal thread and the external thread constantly decreasing towards the free end.
  • the extraction tool used surrounds an anchor bolt that may be present, the conical one External thread allows access to the gap between the anchor bolt and the expansion sleeve.
  • a circular cutting edge is created in the end area.
  • the through bore has an internal thread which is matched to the thread of the anchor bolt which may be present, the axial extent of which corresponds essentially to the axial extent of the external thread.
  • the thread pitch of the external thread suitably corresponds to the thread pitch of the internal thread.
  • the anchor bolt When the external thread is screwed into the expansion sleeve, the anchor bolt can experience an axial movement via the internal thread of the extracting tool if the pitch is not the same. On the one hand, this could lead to the bolt abutting the bottom of the bore, thus preventing the extraction tool from being screwed in further, and on the other hand, an expansion process of the expansion elements could be initiated. For this reason, both threads advantageously have the same pitch.
  • the external thread preferably has an inclination of 2 ° to 7 ° with respect to the longitudinal axis of the extraction tool towards the free end. Due to the low inclination, the extraction tool can continue into the gap between the Anchor bolts and the expansion sleeve are screwed in, so that the external thread can cut a thread serving for axial support into the inner wall of the expansion sleeve.
  • a pull-out tool is preferably used, the external thread of which has an inclination of 2 °. The flatter the slope, the more threads can be cut into the inner wall. In this way, higher axial pull-out values are achieved.
  • the external thread of the extraction tool preferably has an incline of 5 ° to 7 °.
  • the external thread is expediently a cutting thread in order to ensure a connection by means of a thread cutting process. This cutting process is further promoted if the extraction tool advantageously consists of hardenable steel.
  • FIG. 1 shows an anchor which is composed of an anchor bolt 4, an expansion sleeve 2, a spacer sleeve 8, a washer 6 and a nut 5.
  • An axial force applied via the nut 5 causes the expansion elements 2a of the expansion sleeve 2 to expand radially in the area deepest in the borehole.
  • the second component 7 to be fastened sits between the washer 6 and the surface of the component 3.
  • the extraction tool 1 shown in FIG. 2 has an internal thread 1e on the inner circumference of a through hole 1d, the pitch of which is matched to the thread pitch of an anchor bolt 4.
  • An external thread 1b has the same pitch as the internal thread 1e. The beginning of their thread lies on the same radius, which extends from the circumference of the external thread 1b to the center of the extraction tool 1. A constant expansion of the wall thickness in the direction of the shaft 1a can thus be achieved.
  • the conical external thread 1b runs together with the internal thread 1e, so that an annular cutting edge, which acts towards the free end, forms on the end face 1f.
  • a force application means 1c is provided at the opposite end.
  • the through hole 1d adjoining the internal thread 1e is of expanded design. Due to this enlarged through hole 1d, the extracting tool 1 can also be used when the anchor bolt 4 is slightly bent.
  • the force application means 1c in the form of two pin-shaped elements is arranged at right angles to the longitudinal axis of the extraction tool 1. These pin-shaped elements are inserted in prefabricated bores, protrude up to the inner wall of the through bore 1d and are welded to the outer surface of the extraction tool 1.
  • Another possibility of designing the force application means 1c is to arrange a pin-shaped one Element that is inserted through both holes and then welded on.
  • the procedure for removing an expansion sleeve 2 from a borehole 9 in a component 3 is as follows: First the nut 5 is loosened and removed together with the washer 6 from the anchor bolt 4. The component 7 to be fastened is then lifted off the component 3, so that the spacer sleeve 8 can be pulled out without difficulty with a tool in the form of pliers. So that the expansion sleeve 2 can be relieved, an axial movement of the Anchor bolt 4 take place in the borehole 9. In order to avoid damage to the thread on the anchor bolt 4, the nut 5 is screwed back onto the anchor bolt 4 so that the blows emitted on the end face of the anchor bolt 4 are absorbed by the nut 5 and transmitted to the anchor bolt 4 via the thread flanks.
  • the nut 5 is then unscrewed again and the extraction tool 1 is inserted into the borehole 9, so that the conical external thread 1b comes into contact with the inner wall 2b of the expansion sleeve 2 in order to obtain a positive connection by cutting a thread.
  • the extraction tool 1 in which the external thread 1b converges with the through-hole 1d, the remaining material cross section in the region of the tooth base is very small. Due to the internal thread 1e in the through hole 1d with the same thread start, this narrowing of the cross section can be achieved be avoided that the tooth tips of the internal thread 1e extend into the thread 4c of the anchor bolt 4.
  • the extraction tool 1 pulls axially on the expansion sleeve 2 so that the expansion elements 2a are pressed together.
  • the further pulling out of the borehole 9 takes place without problems.
  • the pulling out of the expansion sleeve 2 can be facilitated by a striking tool, not shown, arranged in the area of the force application means 1c.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dowels (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Beverage Vending Machines With Cups, And Gas Or Electricity Vending Machines (AREA)
  • Earth Drilling (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
EP92810071A 1991-02-11 1992-01-31 Ausziehwerkzeug Expired - Lifetime EP0499580B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4104073 1991-02-11
DE4104073A DE4104073A1 (de) 1991-02-11 1991-02-11 Ausziehwerkzeug

Publications (3)

Publication Number Publication Date
EP0499580A2 EP0499580A2 (de) 1992-08-19
EP0499580A3 EP0499580A3 (en) 1993-01-27
EP0499580B1 true EP0499580B1 (de) 1995-06-21

Family

ID=6424797

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92810071A Expired - Lifetime EP0499580B1 (de) 1991-02-11 1992-01-31 Ausziehwerkzeug

Country Status (5)

Country Link
US (1) US5201104A (da)
EP (1) EP0499580B1 (da)
AT (1) ATE123988T1 (da)
DE (2) DE4104073A1 (da)
DK (1) DK0499580T3 (da)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4220300A1 (de) * 1992-06-20 1993-12-23 Adolf Wuerth Gmbh & Co Kg Spreizdübel
DE19712174C2 (de) * 1997-03-22 2002-10-24 Fischer Artur Werke Gmbh Ausziehwerkzeug für einen Spreizanker
DE19713541A1 (de) * 1997-04-02 1998-10-08 Fischer Artur Werke Gmbh Demontagewerkzeug für einen Spreizdübel
DE19932863A1 (de) * 1999-07-14 2001-01-18 Hilti Ag Demontagevorrichtung für formschlüssig verankernden Dübel
US7240588B1 (en) 2002-06-17 2007-07-10 Teleflex Medical Incorporated Method of making a tool for extracting a broken screw
US6601277B1 (en) * 2002-09-13 2003-08-05 Richard C. Swanson Puller tool for bolt seals and the like
DE102004005459A1 (de) * 2004-02-04 2005-08-25 Fischerwerke Artur Fischer Gmbh & Co. Kg Umformwerkzeug zum Lösen eines Spreizankers und Verfahren zur Verwendung des Umformwerkzeugs
DE102004035922A1 (de) * 2004-07-23 2006-02-16 Fischerwerke Artur Fischer Gmbh & Co. Kg Auszieher für eine Spreizhülse eines Spreizankers
US20070123909A1 (en) * 2005-10-27 2007-05-31 Rupp Glenn A Extractor For Broken Bone Screws
FR2947596B1 (fr) * 2009-07-06 2015-09-25 Airbus Operations Sas Insert taraude pour alesage cylindrique et equipement d'installation d'un tel insert
US8567028B2 (en) * 2009-09-17 2013-10-29 Service Solutions U.S. Llc Injector sleeve removal device and method of use
DE102010043769B4 (de) * 2010-11-11 2015-07-09 Hilti Aktiengesellschaft Ankerbaugruppe, insbesondere für den Berg- und Tunnelbau
US20120210568A1 (en) * 2011-02-20 2012-08-23 Yang A-Mei Uninstaller for taking out brake caliper piston
CN103406869A (zh) * 2013-07-31 2013-11-27 济南二机床集团有限公司 等离子涡流环取出器
US20160279772A1 (en) * 2014-03-25 2016-09-29 I Ray Fitzgerald Woods Device and Method for Broken Extractor Removal
CN106346409A (zh) * 2016-11-11 2017-01-25 西安近代化学研究所 一种密闭爆发器垫圈拆卸工具
CN109129309A (zh) * 2018-08-28 2019-01-04 西安理工大学 盲孔内衬拆卸工具
CN108908207B (zh) * 2018-08-30 2024-01-19 莱芜钢铁集团有限公司 一种锥面预应力杆拆卸工装及操作方法
CN109877764B (zh) * 2019-03-20 2021-01-01 广东乾诚建筑工程有限公司 一种膨胀螺栓在建筑墙体上的锚固方法
CN111761544B (zh) * 2019-08-28 2021-08-17 北京无线电测量研究所 一种用于组合安装插件的插拔装置
CN111360753B (zh) * 2020-03-25 2024-03-29 上海建工一建集团有限公司 膨胀螺栓拆除装置及其应用施工方法
US20220268055A1 (en) * 2021-02-15 2022-08-25 Mark Peabody Fence Post Concrete Extractor Device
US12318895B2 (en) * 2022-12-03 2025-06-03 Douglas Waite Filter extraction tool
CN116810348A (zh) * 2023-07-18 2023-09-29 国营川西机器厂 航空发动机导管内嵌铜垫分解装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1382835A (en) * 1918-10-25 1921-06-28 Arthur K Johnson Bushing-tool
US2305261A (en) * 1940-11-23 1942-12-15 Myron M Kinley Method of removing pipe from wells
US4920625A (en) * 1988-12-05 1990-05-01 Smith Mark A Arrowhead extractor

Also Published As

Publication number Publication date
DK0499580T3 (da) 1995-10-09
DE4104073A1 (de) 1992-08-13
ATE123988T1 (de) 1995-07-15
DE59202569D1 (de) 1995-07-27
EP0499580A3 (en) 1993-01-27
EP0499580A2 (de) 1992-08-19
US5201104A (en) 1993-04-13

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