EP2495076B1 - Procédé de fixation pour une ancre extensible et vis à percussion pour la fixation d'une ancre extensible - Google Patents

Procédé de fixation pour une ancre extensible et vis à percussion pour la fixation d'une ancre extensible Download PDF

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Publication number
EP2495076B1
EP2495076B1 EP12151662.9A EP12151662A EP2495076B1 EP 2495076 B1 EP2495076 B1 EP 2495076B1 EP 12151662 A EP12151662 A EP 12151662A EP 2495076 B1 EP2495076 B1 EP 2495076B1
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EP
European Patent Office
Prior art keywords
expansion bolt
setting
expansion
impact screwdriver
duration
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
EP12151662.9A
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German (de)
English (en)
Other versions
EP2495076A1 (fr
Inventor
Peer Schmidt
Joerg Appl
Serhey Khandozhko
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
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Hilti AG
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Publication of EP2495076A1 publication Critical patent/EP2495076A1/fr
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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
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
    • B25B23/1475—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers for impact wrenches or screwdrivers

Definitions

  • the present invention relates to a setting method for an expansion anchor.
  • Expansion anchors are inserted into a pre-drilled hole and then tightened their drawbar by default using a torque wrench.
  • the use of a torque wrench proves to be necessary because a user can not look at the expansion anchor inserted in the hole, whether it is properly braced, i. is set.
  • a torque wrench proves to be necessary because a user can not look at the expansion anchor inserted in the hole, whether it is properly braced, i. is set.
  • the manufacturers of the expansion anchor accordingly indicate an associated tightening torque which is to be set on the torque wrench for setting.
  • EP 1 595 649 A2 discloses an impact wrench adapted to set screws, nuts or bolts by means of rotary strikes.
  • a user can set a tightening torque using a thumbwheel.
  • a measuring device estimates an output torque based on the number of output rotational strokes or a ratio of rotational angle of the output shaft and the rotational speed of the drive shaft. If the estimated torque exceeds the set tightening torque, the engine of the impact wrench is switched off. The user can, if the fastener does not appear to be sufficiently tightened, transfer the impact wrench to a tightening mode by rapidly pressing the main switch. In the tightening mode, the impact wrench applies a fixed number of punches, one. Number of rotations of the drive shaft or a fixed rotation of the output shaft.
  • EP 1 188 521 A2 describes a hand tool that includes a reading device, eg a laser scanner, for an identification, eg a bar code, of a fastening means. The setting of the fastening means is terminated upon reaching the identification torque associated with the identification.
  • a reading device eg a laser scanner
  • an identification eg a bar code
  • An impact wrench for setting an expansion anchor has a read-in device for inputting a type of the expansion anchor or a tightening torque for the expansion anchor.
  • An impact mechanism of the impact wrench is used to generate repetitive turns.
  • a control device sets a repetition rate of the rotary lobe as a function of the type of expansion anchor or the entered tightening torque.
  • a sensor serves to detect a rotational speed of the drawbar, in response to a shutdown device, the impact mechanism deactivates when the detected speed falls below a threshold.
  • Fig. 1 shows an exemplary expansion anchor 1 consists of a tie rod 2 and an expansion sleeve 3.
  • the expansion sleeve 3 circumferentially surrounds a cylindrical portion 4 of the draw bar 2.
  • An outer diameter 5 of the cylindrical portion 4 is preferably slightly smaller than an inner diameter 6 of the expansion sleeve 3, whereby the draw bar 2 is axially movable relative to the Aufspreizelement 3 .
  • the cylindrical section 4 merges into a conical section 7 , which forms an expansion body 8 for spreading the expansion sleeve 3 .
  • the largest diameter of the conical portion 7 is greater than the inner diameter 6 of the expansion sleeve 3 and preferably less than an outer diameter 9 of the expansion sleeve 3.
  • a thread 10 is provided, via which a tensile force can be introduced.
  • the thread 10 serves at the same time a fastening of loads.
  • the expansion anchor 1 with the expansion body 8 is inserted into a borehole having a diameter equal to the outer diameter of the unexpanded expansion sleeve 3 .
  • a nut 11 is screwed onto the thread 10 and tightened until the pull rod 2 together with the spreader 8 is pulled into the expansion sleeve 3 .
  • the expansion sleeve 3 trapped thereby secured to a wall 12 of the borehole.
  • the expansion anchor 1 is set properly when the Expansion sleeve 3 is radially expanded by a certain amount. A user can recognize this when the pull rod 2 stops rotating at a specified tightening torque.
  • expansion anchors for example, a bolt with a mating thread that engages the thread 10 of the drawbar 2 .
  • the user uses a screwing tool on the bolt and pulls in this way the pull rod 2 with the spreader 8 in the expansion sleeve . 3
  • the exemplary expansion anchors 1 can be set by means of an adapted impact wrench 20 .
  • the impact wrench 20 has a percussion mechanism 21 which periodically generates rotary impacts.
  • a hammer 22 is mounted on a drive shaft 23 by means of a helical link 24 .
  • a spring 25 presses the hammer 22 along the output shaft 23 in the direction of an anvil 26.
  • the anvil 26 is rigidly connected to an output shaft 27 .
  • the drive shaft 23 and the output shaft 27 are rotatable relative to each other.
  • the hammer 22 and the anvil 26 have projecting jaws 28 along the drive shaft 23 , via which the hammer 22 can transmit torque to the anvil 26 .
  • An electric motor 29 drives the drive shaft 23 .
  • One cycle of a rotary stroke has essentially the following phases.
  • the claws 28 of the hammer 22 abut the anvil 26 .
  • the rotating drive shaft 23 pulls the hammer 22 away from the anvil 26 against the force of the spring 25 because of the link 24 until the dogs 28 are disengaged from the anvil 26 .
  • the hammer 22 moves in the direction of the anvil 26 and is thereby set by the link 24 in a rotational movement.
  • the jaws 28 eventually strike tangentially against the anvil 26 .
  • An embodiment of the impact wrench 20 has an input device 30, by means of which a user can input a tightening torque of the expansion anchor 1 .
  • the input device 30 includes, for example, a button 31 or a keyboard and a display element 32.
  • an input device may be provided, via which the user can set a type for a spreading anchor. For example, two buttons for selecting a type of expansion anchor and a size of the expansion anchor are provided. The selected type can be displayed, for example, in a display or via several LEDs.
  • the impact wrench has a detection device 33, which determines the type of the expansion anchor 1 (101).
  • the recognition device 33 includes, for example, a reading unit 34 for an RFID chip.
  • the recognized type can be the Input device 30 are transmitted, among other things so that the recognized type is displayed to the user.
  • the recognition device 33 may also include a camera, which determines the type of expansion anchor on the basis of shape and size.
  • a controller 35 reads in the input tightening torque from the input device 30 and the recognizer 33, respectively ( 100 ).
  • the control device 35 determines based on the input tightening torque a speed N_soll for the drive shaft 23 ( 101 ). For example, rotational speeds assigned to different tightening torques are stored in a memory device 36 .
  • the control device 35 checks whether a rotational speed N has previously been predetermined ( 102 ), that is, for example, by specifying the type of armature or the tightening torque.
  • the control device 35 may inhibit activation of the motor 29, for example, if no tightening torque was selected so far, but instead prompt the user for an input ( 103 ).
  • the control device 35 controls the electric motor 29 such that the drive shaft 23 rotates at the predetermined speed N ( 104 ).
  • the rotational speed of the drive shaft 23 specifies the repetition rate of the rotational shocks. It was recognized that with a lowering of the speed not only frequency of the rotational shocks decreases, which is so far irrelevant for the setting of the expansion anchor, but also the torque exerted with each rotational shock is lowered. Each of the speeds is assigned, although with a large tolerance, a torque.
  • the impact wrench 38 begins to turn the pull rod 2 with a maximum possible speed to him. After a period of time, which is preferably determined by the input type of the expansion anchor 1 , the impact wrench lowers the rotational speed to the rotational speed predetermined in dependence on the tightening torque.
  • the speed sensor 39 includes, for example, a plurality of axial ribs 40 which are arranged along the circumference of the output shaft 27 at constant first angular intervals.
  • Two magnetic field sensors 41 eg Hall sensors, are arranged offset to one another at a second angular distance.
  • the second angular distance modulo the first angular distance is in the range between 20% and 33% of the first angular distance.
  • the speed sensor 39 detects the rotational speed in addition also the sense of rotation of the output shaft 27. After a rotary impact to the output shaft 27 can move against the predetermined direction of rotation.
  • the rotational speed sensor 39 determines, based on the direction of rotation, the effective rotational speed d of the output shaft 27 in the predetermined direction of rotation ( 105 ), for example by means of an integrator.
  • the rotational speed d of the output shaft 27 is substantially identical to the rotational speed of the drawbar 2 and thus serves as a measure of the progress of the rotation of the pull rod or its axial displacement relative to the expansion sleeve . 3
  • the impact wrench 20 compares a detected rotational speed d of the output shaft 27 with a predetermined threshold value D for the rotational speed ( 106 ). If the average speed d falls below the threshold value D, the control device 35 switches off the motor 29 ( 109 ). The output shaft 27z now moves on average by a very small angle or not at all.
  • the threshold value D can be fixed, for example, by the impact wrench 20 .
  • the impact wrench 20 can stop the rotation when a maximum time T for setting a setting anchor 1 has elapsed after the operation of the button 37 (FIG. 107 ).
  • the control device 35 can detect the time t since the actuation of the pushbutton 37 . This can be traceable to a malfunction of the expansion anchor 1 , for example, the expansion sleeve 3 rotates in the borehole. The impact wrench 20 detects this as a misconduct and outputs a corresponding warning signal.
  • the impact wrench 20 may have a recording device 42 which records a protocol for each set expansion anchor 1 ( 108 ).
  • the recording device 42 includes, for example, a memory device and a communication interface for outputting the content of the memory device.
  • the expansion anchors 1 are provided with a unique identifier, such as a number of an RFID chip.
  • the detection device 33 determines before setting an expansion anchor 1 whose unique identifier. If an automatic identifier is not successful or not provided, the identifier can be entered manually. During setting, for example, the number of swings or the duration of the setting process can be recorded. Additionally or alternatively, it can be recorded how the rotational speed of the output shaft 27 changes, in particular the rotational speed at the time of the shutdown of the impact wrench. In this case, the speed is also recorded when the user stops setting the expansion anchor by releasing the button 37 .
  • the data logged by the recording device 42 can be read out via a wireless or wired interface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (5)

  1. Procédé de pose pour un ancrage expansible consistant à appliquer de manière répétée des roto-percussions sur un tirant (2, 10) de l'ancrage expansible (1) au moyen d'une visseuse à percussion, dans lequel la visseuse à percussion règle l'application des roto-percussions lorsqu'une vitesse de rotation moyenne (d) détectée du tirant (2, 10) chute sous une valeur de seuil (D), caractérisé en ce qu'une fréquence de répétition (Nsoll) des roto-percussions est réglée en fonction d'un couple de démarrage prédéfini pour écarter une douille d'expansion (3) de l'ancrage expansible (1).
  2. Procédé de pose selon la revendication 1, caractérisé en ce que la visseuse à percussion règle la fréquence de répétition en réponse à une entrée indiquant un type de l'ancrage expansible ou du couple de démarrage.
  3. Procédé de pose selon la revendication 1 ou 2, caractérisé en ce que la visseuse à percussion détecte une durée pour une pose de l'ancrage expansible et émet un signal d'alarme lorsque la durée dépasse une valeur de seuil.
  4. Procédé de pose selon l'une des revendications précédentes, caractérisé en ce que la visseuse à percussion applique des roto-percussions sur le tirant avec une fréquence de répétition maximale possible de la visseuse à percussion pendant une première durée, et après la première durée, passe à la fréquence de répétition prédéfinie par le couple de démarrage.
  5. Procédé de pose selon l'une des revendications précédentes, caractérisé en ce qu'un dispositif d'enregistrement de la visseuse à percussion enregistre un ou plusieurs paramètres pendant l'application des roto-percussions : identification de l'ancrage expansible, nombre de roto-percussions appliquées sur l'ancrage expansible, durée pendant laquelle les roto-percussions sont appliquées sur l'ancrage expansible, arrêt de la pose par l'utilisateur, chute sous la valeur de seuil par la vitesse de rotation moyenne du tirant.
EP12151662.9A 2011-03-04 2012-01-19 Procédé de fixation pour une ancre extensible et vis à percussion pour la fixation d'une ancre extensible Active EP2495076B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011005079A DE102011005079A1 (de) 2011-03-04 2011-03-04 Setzverfahren für einen Spreizanker und Schlagschrauber zum Setzen eines Spreizankers

Publications (2)

Publication Number Publication Date
EP2495076A1 EP2495076A1 (fr) 2012-09-05
EP2495076B1 true EP2495076B1 (fr) 2018-09-12

Family

ID=45558544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12151662.9A Active EP2495076B1 (fr) 2011-03-04 2012-01-19 Procédé de fixation pour une ancre extensible et vis à percussion pour la fixation d'une ancre extensible

Country Status (6)

Country Link
US (1) US9233458B2 (fr)
EP (1) EP2495076B1 (fr)
CN (1) CN102653050B (fr)
DE (1) DE102011005079A1 (fr)
HK (1) HK1173699A1 (fr)
RU (1) RU2012107984A (fr)

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DE102013203553B3 (de) * 2013-03-01 2014-07-17 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Handgeführtes Pressgerät
US20140259599A1 (en) * 2013-03-15 2014-09-18 Honda Motor Co., Ltd. Torque gun with vision system
US9597784B2 (en) * 2013-08-12 2017-03-21 Ingersoll-Rand Company Impact tools
DE102014211891A1 (de) * 2014-06-20 2015-12-24 Robert Bosch Gmbh Verfahren zum Betreiben eines Elektrowerkzeuges
EP2985117A1 (fr) 2014-08-12 2016-02-17 HILTI Aktiengesellschaft Procéde optimisé pour une ancre extensible
EP2985118A1 (fr) * 2014-08-12 2016-02-17 HILTI Aktiengesellschaft Procéde optimisé pour une ancre extensible
US11440153B2 (en) * 2015-08-27 2022-09-13 Hubbell Incorporated Remotely activated portable hand tool
US10646982B2 (en) * 2015-12-17 2020-05-12 Milwaukee Electric Tool Corporation System and method for configuring a power tool with an impact mechanism
JP2018108633A (ja) * 2016-12-28 2018-07-12 パナソニックＩｐマネジメント株式会社 工具システム
WO2018123433A1 (fr) 2016-12-28 2018-07-05 パナソニックＩｐマネジメント株式会社 Système d'outil
US11097405B2 (en) * 2017-07-31 2021-08-24 Ingersoll-Rand Industrial U.S., Inc. Impact tool angular velocity measurement system
EP3501743A1 (fr) 2017-12-20 2019-06-26 HILTI Aktiengesellschaft Procédé de pose pour élément d'ancrage à expansion au moyen de la clé à percussion
EP3501742A1 (fr) * 2017-12-20 2019-06-26 HILTI Aktiengesellschaft Procédé de pose pour élément d'ancrage à expansion au moyen de la clé à percussion
DE102018212558A1 (de) * 2018-07-27 2020-01-30 Robert Bosch Gmbh Ankervorrichtung
JP7281744B2 (ja) * 2019-11-22 2023-05-26 パナソニックＩｐマネジメント株式会社 インパクト工具、インパクト工具の制御方法及びプログラム
CN113864304B (zh) * 2020-06-30 2023-06-13 喜利得股份公司 用于自钻孔锚栓的安装设备及安装方法
JP2022106194A (ja) * 2021-01-06 2022-07-19 株式会社マキタ インパクト工具

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Also Published As

Publication number Publication date
DE102011005079A1 (de) 2012-09-06
CN102653050B (zh) 2016-05-04
US20120222876A1 (en) 2012-09-06
EP2495076A1 (fr) 2012-09-05
HK1173699A1 (zh) 2013-05-24
CN102653050A (zh) 2012-09-05
RU2012107984A (ru) 2013-09-10
US9233458B2 (en) 2016-01-12

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