EP1277548B1 - Bolt driving tool with setting depth control - Google Patents

Bolt driving tool with setting depth control Download PDF

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Publication number
EP1277548B1
EP1277548B1 EP01810717A EP01810717A EP1277548B1 EP 1277548 B1 EP1277548 B1 EP 1277548B1 EP 01810717 A EP01810717 A EP 01810717A EP 01810717 A EP01810717 A EP 01810717A EP 1277548 B1 EP1277548 B1 EP 1277548B1
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EP
European Patent Office
Prior art keywords
sensor
bolt
setting
driving
gun according
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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
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EP01810717A
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German (de)
French (fr)
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EP1277548A1 (en
Inventor
Christoph Würsch
Albert Binder
Harald Schmitzer
Wolfgang Zesch
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Hilti AG
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Hilti AG
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Publication date
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Priority to EP01810717A priority Critical patent/EP1277548B1/en
Priority to DE50109817T priority patent/DE50109817D1/en
Priority to AU52745/02A priority patent/AU784939B2/en
Priority to US10/197,174 priority patent/US6679410B2/en
Priority to CNB02126189XA priority patent/CN1289264C/en
Publication of EP1277548A1 publication Critical patent/EP1277548A1/en
Application granted granted Critical
Publication of EP1277548B1 publication Critical patent/EP1277548B1/en
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/18—Details and accessories, e.g. splinter guards, spall minimisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/14—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil
    • B25C1/143—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil trigger operated

Definitions

  • the invention relates to a bolt setting device with a set depth control and an associated control method.
  • a Mehrschlagnagelrace has an electronic Schlagenergieregelung for the next partial stroke on the same nail pin on a stored control function for the current flow angle of the electromagnetic percussion from the achieved Operaindringtiefen Sung, which with an optical or magnetic incremental displacement sensor for the electromagnetically driven setting piston on the position of the lower Motion dead point is determined.
  • the driving operation is terminated and the Schlierenergieregelung initialized for the next driving operation.
  • Such Schlagenergieregelung for partial blows is not applicable to bolt guns with a single drive operation.
  • the object of the invention is the realization of a bolt setting device with a setting depth control for a single driving operation and an associated control method.
  • a bolt gun with a driven by an expanding propellant gas in a combustion chamber, setting piston for driving a nail bolt in a single driving a control loop with control electronics, a setpoint generator for the setting depth, a position measuring sensor for determining the position of the lowermostsstottotanks setting piston and a control means for autonomous adjustment of the kinetic energy of the setting piston for the next driving operation.
  • the driving operation is triggered in a first step by actuation of the actuating switch; in a second step by the position measuring sensor, the position of the setting piston during Eintreibvorgangs at least at nodes repeatedly measured and determined from the control electronics, the position of the lowermostsstotmays, which is correlated with the setting depth of the nail pin.
  • a control variable for the control means for the change of the kinetic energy of the setting piston is determined by the control electronics from the position of the lowermostsstotmays and the set value of the setting for the next setting process and temporarily stored as a setting for the next setting process, which in a fourth Step is set by the control means.
  • steps one to four are repeated periodically, whereby an automatic regulation of the setting depth is achieved from the second driving operation.
  • the kinetic energy of the next driving operation for the next nail pin is determined via the electronic control unit and temporarily stored via the control means, whereby a setting depth achieved in a single driving operation is automatically achieved within a few setting operations in accordance with the preselectable setpoint becomes.
  • control means is designed as an electrically controllable, mechanical actuator, which is further advantageously formed in a conventional manner for changing the fuel quantity, the mixing ratio, the combustion chamber volume, the discharge devices for the propellant gas or the position of the damper elements.
  • the position measuring sensor with a plurality, on the setting piston axially equidistantly spaced and further advantageous rotationally symmetrical sensor marks formed as an incremental sensor, which is connected to a, further advantageously integrated into the control electronics, counting, whereby the position measuring sensor is very small and robust executable.
  • the incremental sensor is a magnetic field-sensitive semiconductor sensor such as a magnetoresistive sensor or a Hall sensor, which lugs or recesses are assigned to the setting piston as sensor marks, which evaluates a permanent magnetic field, which is further advantageously generated by a permanent magnet at the location of the semiconductor sensor for this modulate, whereby a very robust construction of the position measuring sensor is given.
  • a magnetic field-sensitive semiconductor sensor such as a magnetoresistive sensor or a Hall sensor, which lugs or recesses are assigned to the setting piston as sensor marks, which evaluates a permanent magnetic field, which is further advantageously generated by a permanent magnet at the location of the semiconductor sensor for this modulate, whereby a very robust construction of the position measuring sensor is given.
  • the sensor marks are formed as narrow residual webs between each two closely adjacent, circumferential Rundnuten, whereby on the one hand determined by the strong curvature of the surface of the rest webs change of the magnetic field strength as a measured sufficiently large and on the other hand, the notch number of round grooves for the remaining cross section of mechanically strong Ascended setting piston is as low as possible.
  • the incremental sensor consists of at least two partial sensors, which are connected to each other for measuring a differential measurement result, whereby absolute fluctuations in measured values, as may occur in particular by the up to 0.6 mm amount of radial guide clearance of the setting bolt in the guide barrel of the bolt setting device, are metrologically eliminated.
  • two partial sensors are axially staggered by a quarter period of the sensor marks, whereby the axial direction of movement of the setting bolt can be determined by means of quadrature detection over the time rank of a measured value change registered in both component sensors, whereby in particular the lower movement dead center can be reliably detected via the direction reversal.
  • a timer is assigned to the position-measuring sensor, whereby the lower movement dead center is reliably detectable over the maximum time and, in addition to the period length of the sensor marks, the speed of the setting bolt, which is correlated with the set energy, can be calculated and a calculation of the hardness of the ground according to the Windsor. Method is enabled, which can be displayed by the bolt gun.
  • a screw-type power tool 1 shown schematically has a setting piston 4 driven by an expanding propellant gas of a powder cartridge in a combustion chamber 2, guided in a guide run 3 in an axially limited manner for driving a nail bolt 5 assigned in the axial direction into a base 6 to to a lowertheresstot Vietnamese uTP or an associated setting depth T a strongly illustrated electromechanical control circuit I.
  • a control electronics 7 in the form of a microcontroller with integrated counter n and timer t is a mosein monoen setpoint generator 8 for the setting depth T, arranged in a guide 3 position sensor 9, a control means 10 in the form of an electrically controllable, mechanical actuator electromechanically displaceable Auslassventilhülse and an actuating switch 11 controllably connected.
  • the control electronics 7 controls a numerical display connected thereto for displaying the setting depth T or the hardness of the substrate 6.
  • the position measuring sensor 9 is formed as an incremental Hall sensor, the many, on the ferromagnetic setting piston 4 axially spaced with the period length P of 3 mm equidistantly spaced, rotationally symmetric sensor marks 12 in the form of narrow residual webs between each two closely adjacent, circumferential grooves of each 0.5 mm deep and 2.5 mm wide formed, which modulate a permanent magnetic field H, which is generated by an adjacent to the Hall sensor, toroidal permanent magnet 13, 13a, at the location of the Hall sensor for this evaluable.
  • the position measuring sensor 9 consists of two partial sensors 14a, 14b which are arranged radially diametrically to the setting piston 4 and which are arranged offset axially by a quarter period P of the sensor marks 12.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Description

Die Erfindung bezeichnet ein Bolzensetzgerät mit einer Setztiefenregelung und ein zugeordnetes Regelungsverfahren.The invention relates to a bolt setting device with a set depth control and an associated control method.

Bei Bolzensetzgeräten wird in einem einmaligen Eintreibvorgang, welcher üblicherweise durch die Explosion einer Pulverkartusche oder die Verbrennung eines Gasgemisches in einer Brennkammer entsteht, ein Setzkolben beschleunigt, welcher mit seiner Bewegungsenergie einen Nagelbolzen in den Untergrund eintreibt. Die Bewegungsenergie ist entsprechend der Härte des Untergrundes und der gewünschten Setztiefe durch die Wahl der Pulverkartusche bzw. der Zusammensetzung des Gasgemisches sowie der Veränderung des Brennkammervolumens, der Anfangsposition des Setzkolbens und zugeordneter Dämpferelemente vorzuwählen. Üblicherweise sind dazu Vorversuche erforderlich, welche Zeit und Material verbrauchen.When bolt guns in a one-time driving, which is usually caused by the explosion of a powder cartridge or the combustion of a gas mixture in a combustion chamber, a setting piston accelerated, which drives a nail bolt with its kinetic energy into the ground. The kinetic energy is to be selected according to the hardness of the substrate and the desired setting depth by the choice of the powder cartridge or the composition of the gas mixture and the change in the combustion chamber volume, the initial position of the setting piston and associated damper elements. Usually this preliminary tests are required, which consume time and material.

Nach der DE3930592A1 ist ein pulvergetriebenes Bolzensetzgerät mit einem Setzkolben und elastischen Dämpferelementen zur Setztiefenregelung vorbekannt, bei dem mittels manueller Variation der Anfangsposition des Setzkolbens zu den zugeordneten Dämpferelementen über Vorversuche die Setztiefe des nächsten Nagelbolzens einstellbar ist.According to DE3930592A1 a powder-actuated bolt setting device with a setting piston and elastic damper elements for setting depth control is already known, in which by means of manual variation of the initial position of the setting piston to the associated damper elements on preliminary tests, the setting depth of the next nail pin is adjustable.

Nach der EP338257B1 weist ein Mehrschlagnagelgerät eine elektronische Schlagenergieregelung für den nächsten Teilschlag auf denselben Nagelbolzen über eine abgespeicherte Regelfunktion für den Stromflusswinkel des elektromagnetischen Schlagwerks von der erzielten Teileindringtiefenänderung auf, welche mit einem optischen oder magnetischen inkrementellen Wegmesssensor für den elektromagnetisch angetriebenen Setzkolben über die Position des unteren Bewegungstotpunktes ermittelt wird. Nach dem Erreichen des vorwählbaren Sollwertes der Setztiefe, welche durch eine Summierung der Teileindringtiefenänderungen über alle Teilschläge oder einen Endpositionssensor ermittelt wird, wird der Eintreibvorgang beendet und die Schlagenergieregelung für den nächsten Eintreibvorgang initialisiert. Eine derartige Schlagenergieregelung für Teilschläge ist bei Bolzensetzgeräten mit einem einmaligen Eintreibvorgang nicht anwendbar.According to EP338257B1 a Mehrschlagnagelgerät has an electronic Schlagenergieregelung for the next partial stroke on the same nail pin on a stored control function for the current flow angle of the electromagnetic percussion from the achieved Teilindringtiefenänderung, which with an optical or magnetic incremental displacement sensor for the electromagnetically driven setting piston on the position of the lower Motion dead point is determined. After reaching the preselectable set value of the set depth, which is determined by a summation of Teilindringtiefenänderungen over all partial beats or an end position sensor, the driving operation is terminated and the Schlierenergieregelung initialized for the next driving operation. Such Schlagenergieregelung for partial blows is not applicable to bolt guns with a single drive operation.

Die Aufgabe der Erfindung besteht in der Realisierung eines Bolzensetzgerätes mit einer Setztiefenregelung für einen einmaligen Eintreibvorgang und eines zugeordneten Regelungsverfahrens.The object of the invention is the realization of a bolt setting device with a setting depth control for a single driving operation and an associated control method.

Die Aufgabe wird im wesentlichen durch die Merkmale der unabhängigen Ansprüche gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.The object is essentially achieved by the features of the independent claims. Advantageous developments emerge from the subclaims.

Im wesentlichen weist ein Bolzensetzgerät mit einem, von einem expandierenden Treibgas in einer Brennkammer angetriebenen, Setzkolben zum Eintreiben eines Nagelbolzens in einem einmaligen Eintreibvorgang einen Regelkreis mit einer Regelungselektronik, einem Sollwertgeber für die Setztiefe, einem Positionsmesssensor zur Bestimmung der Position des unteren Bewegungstotpunktes des Setzkolbens und einem Steuermittel zur selbstständigen Einstellung der Bewegungsenergie des Setzkolbens für den nächsten Eintreibvorgang auf.In essence, a bolt gun with a, driven by an expanding propellant gas in a combustion chamber, setting piston for driving a nail bolt in a single driving a control loop with control electronics, a setpoint generator for the setting depth, a position measuring sensor for determining the position of the lower Bewegungsstotpunktes setting piston and a control means for autonomous adjustment of the kinetic energy of the setting piston for the next driving operation.

Beim Regelungsverfahren wird in einem ersten Schritt durch Betätigung des Betätigungsschalters der Eintreibvorgang ausgelöst; in einem zweiten Schritt vom Positionsmesssensor die Position des Setzkolbens während des Eintreibvorgangs zumindest an Stützstellen mehrfach gemessen und daraus von der Regelungselektronik die Position des unteren Bewegungstotpunktes ermittelt, welche mit der Setztiefe des Nagelbolzens korreliert ist. In einem dritten Schritt wird von der Regelungselektronik aus der Position des unteren Bewegungstotpunktes und des Sollwertes der Setztiefe für den nächsten Setzvorgang eine Stellgrösse für das Steuermittel für die Änderung der Bewegungsenergie des Setzkolbens ermittelt und temporär als Einstellung für den nächsten Setzvorgang zwischengespeichert, welche in einem vierten Schritt vom Steuermittel eingestellt wird. In den folgenden Schritten wiederholen sich die Schritte eins bis vier periodisch, wodurch ab dem zweiten Eintreibvorgang eine selbsttätige Regelung der Setztiefe erzielt wird.In the control method, the driving operation is triggered in a first step by actuation of the actuating switch; in a second step by the position measuring sensor, the position of the setting piston during Eintreibvorgangs at least at nodes repeatedly measured and determined from the control electronics, the position of the lower Bewegungsstotpunktes, which is correlated with the setting depth of the nail pin. In a third step, a control variable for the control means for the change of the kinetic energy of the setting piston is determined by the control electronics from the position of the lower Bewegungsstotpunktes and the set value of the setting for the next setting process and temporarily stored as a setting for the next setting process, which in a fourth Step is set by the control means. In the following steps, steps one to four are repeated periodically, whereby an automatic regulation of the setting depth is achieved from the second driving operation.

Anhängig von der über den Positionsmesssensor ermittelten Setztiefe des letzten Nagelbolzens wird über die Regelungselektronik die Bewegungsenergie des nächsten Eintreibvorgangs für den nächsten Nagelbolzen bestimmt und über das Steuermittel temporär gespeichert eingestellt, wodurch innerhalb weniger Setzvorgänge selbstständig eine in einen einmaligen Eintreibvorgang erzielte Setztiefe entsprechend des vorwählbaren Sollwertes erzielt wird.Depending on the set depth of the last nail pin determined via the position measuring sensor, the kinetic energy of the next driving operation for the next nail pin is determined via the electronic control unit and temporarily stored via the control means, whereby a setting depth achieved in a single driving operation is automatically achieved within a few setting operations in accordance with the preselectable setpoint becomes.

Vorteilhaft ist das Steuermittel als ein elektrisch steuerbarer, mechanischer Aktuator ausgebildet, welcher weiter vorteilhaft in üblicher Weise zur Änderung der Treibstoffmenge, des Mischungsverhältnisses, des Brennkammervolumens, der Ablassvorrichtungen für das Treibgas oder der Position der Dämpferelemente ausgebildet ist.Advantageously, the control means is designed as an electrically controllable, mechanical actuator, which is further advantageously formed in a conventional manner for changing the fuel quantity, the mixing ratio, the combustion chamber volume, the discharge devices for the propellant gas or the position of the damper elements.

Vorteilhaft ist der Positionsmesssensor mit mehreren, auf dem Setzkolben axial äquidistant beabstandeten und weiter vorteilhaft rotationssymmetrischen, Sensormarken als inkrementeller Sensor ausgebildet, welcher mit einer, weiter vorteilhaft in die Regelungselektronik integrierten, Zähleinrichtung verbunden ist, wodurch der Positionsmesssensor sehr klein und robust ausführbar ist.Advantageously, the position measuring sensor with a plurality, on the setting piston axially equidistantly spaced and further advantageous rotationally symmetrical sensor marks formed as an incremental sensor, which is connected to a, further advantageously integrated into the control electronics, counting, whereby the position measuring sensor is very small and robust executable.

Vorteilhaft ist der inkrementelle Sensor ein magnetfeldsensitiver Halbleitersensor wie ein magnetoresistiver Sensor oder ein Hall-Sensor, welchem Nasen oder Aussparungen am Setzkolben als Sensormarken zugeordnet sind, die ein permanentes Magnetfeld, welches weiter vorteilhaft durch einen Permanentmagneten erzeugt wird, am Ort des Halbleitersensors für diesen auswertbar modulieren, wodurch ein sehr robuster Aufbau des Positionsmesssensors gegeben ist.Advantageously, the incremental sensor is a magnetic field-sensitive semiconductor sensor such as a magnetoresistive sensor or a Hall sensor, which lugs or recesses are assigned to the setting piston as sensor marks, which evaluates a permanent magnetic field, which is further advantageously generated by a permanent magnet at the location of the semiconductor sensor for this modulate, whereby a very robust construction of the position measuring sensor is given.

Vorteilhaft sind die Sensormarken als schmale Reststege zwischen je zwei eng benachbarten, umlaufenden Rundnuten ausgebildet, wodurch einerseits eine durch die starke Krümmung der Oberfläche an den Reststegen bestimmte Änderung der magnetischen Feldstärke als Messgrösse hinreichend gross und andererseits die Kerbwirkungszahl der Rundnuten für den Restquerschnitt des mechanisch stark wechselbeanspruchten Setzkolbens möglichst gering ist.Advantageously, the sensor marks are formed as narrow residual webs between each two closely adjacent, circumferential Rundnuten, whereby on the one hand determined by the strong curvature of the surface of the rest webs change of the magnetic field strength as a measured sufficiently large and on the other hand, the notch number of round grooves for the remaining cross section of mechanically strong Ascended setting piston is as low as possible.

Vorteilhaft besteht der inkrementelle Sensor aus zumindest zwei Teilsensoren, welche zur Messung eines differentiellen Messwertergebnisses gegenphasig miteinander verbunden sind, wodurch absolute Messwertschwankungen, wie sie insbesondere durch das bis zu 0.6 mm betragende radiale Führungsspiel des Setzbolzens im Führungslauf des Bolzensetzgerätes auftreten können, messtechnisch eliminiert werden.Advantageously, the incremental sensor consists of at least two partial sensors, which are connected to each other for measuring a differential measurement result, whereby absolute fluctuations in measured values, as may occur in particular by the up to 0.6 mm amount of radial guide clearance of the setting bolt in the guide barrel of the bolt setting device, are metrologically eliminated.

Vorteilhaft sind zwei Teilsensoren um eine viertel Periode der Sensormarken axial versetzt angeordnet, wodurch über den Zeitrang einer in beiden Teilsensoren registrierten Messwertänderung mittels einer Quadraturdetektion die axiale Bewegungsrichtung des Setzbolzens bestimmbar ist, wodurch insbesondere der untere Bewegungstotpunkt über die Richtungsumkehr zuverlässig detektierbar ist.Advantageously, two partial sensors are axially staggered by a quarter period of the sensor marks, whereby the axial direction of movement of the setting bolt can be determined by means of quadrature detection over the time rank of a measured value change registered in both component sensors, whereby in particular the lower movement dead center can be reliably detected via the direction reversal.

Vorteilhaft ist dem Positionsmesssensor ein Zeitgeber zugeordnet, wodurch der untere Bewegungstotpunkt über das Zeitmaximum zuverlässig detektierbar und zusätzlich in Verbindung mit der Periodenlänge der Sensormarken die Geschwindigkeit des Setzbolzens, welche mit der Setzenergie korreliert ist, berechenbar sowie eine Berechnung der Härte des Untergrunds nach dem Windsor-Verfahren ermöglicht wird, welche vom Bolzensetzgerät anzeigbar ist.Advantageously, a timer is assigned to the position-measuring sensor, whereby the lower movement dead center is reliably detectable over the maximum time and, in addition to the period length of the sensor marks, the speed of the setting bolt, which is correlated with the set energy, can be calculated and a calculation of the hardness of the ground according to the Windsor. Method is enabled, which can be displayed by the bolt gun.

Die Erfindung wird bezüglich eines vorteilhaften Ausführungsbeispiels näher erläutert mit:

  • Fig. 1 als pulverkraftgetriebenes Bolzensetzgerät
  • Fig. 2 als Einzelheit mit Positionsmesssensor
The invention will be explained in more detail with respect to an advantageous embodiment with:
  • Fig. 1 as a powder-powered bolt gun
  • Fig. 2 as a detail with position measuring sensor

Nach der Fig. 1 weist ein schematisch dargestelltes pulverkraftgetriebenes Bolzensetzgerät 1 einen, von einem expandierenden Treibgas einer Pulverkartusche in einer Brennkammer 2 angetriebenen, in einem Führungslauf 3 begrenzt axial beweglich geführten Setzkolben 4 zum Eintreiben eines in axialer Richtung zugeordneten Nagelbolzens 5 in einen Untergrund 6 bis zu einem unteren Bewegungstotpunkt uTP bzw. einer zugeordneten Setztiefe T einen stark dargestellten elektromechanischen Regelkreis I auf. Eine Regelungselektronik 7 in Form eines Mikrocontrollers mit integriertem Zähler n und Zeitgeber t ist mit einem dreheinstellbaren Sollwertgeber 8 für die Setztiefe T, einem im Führungslauf 3 angeordneten Positionsmesssensor 9, einem Steuermittel 10 in Form einer als elektrisch steuerbarer, mechanischer Aktuator ausgebildeten elektromechanisch versetzbaren Auslassventilhülse sowie einem Betätigungsschalter 11 steuerbar verbunden. Die Regelungselektronik 7 steuert ein mit diesem verbundenes numerisches Display zur Anzeige der Setztiefe T bzw. der Härte des Untergrundes 6 an.According to FIG. 1, a screw-type power tool 1 shown schematically has a setting piston 4 driven by an expanding propellant gas of a powder cartridge in a combustion chamber 2, guided in a guide run 3 in an axially limited manner for driving a nail bolt 5 assigned in the axial direction into a base 6 to to a lower Bewegungsstotpunkt uTP or an associated setting depth T a strongly illustrated electromechanical control circuit I. A control electronics 7 in the form of a microcontroller with integrated counter n and timer t is a dreheinstellbaren setpoint generator 8 for the setting depth T, arranged in a guide 3 position sensor 9, a control means 10 in the form of an electrically controllable, mechanical actuator electromechanically displaceable Auslassventilhülse and an actuating switch 11 controllably connected. The control electronics 7 controls a numerical display connected thereto for displaying the setting depth T or the hardness of the substrate 6.

Nach Fig. 2 ist der Positionsmesssensor 9 als ein inkrementeller Hallsensor ausgebildet, dem viele, auf dem ferromagnetischen Setzkolben 4 axial mit der Periodenlänge P von 3 mm äquidistant beabstandete, rotationssymmetrische Sensormarken 12 in Form von schmalen Reststegen zwischen je zwei eng benachbarten, umlaufenden Rundnuten von jeweils 0.5 mm Tiefe und 2.5 mm Breite ausgebildet, welche ein permanentes Magnetfeld H, das durch einen zum Hallsensor benachbarten, torusförmigen Permanentmagneten 13, 13a erzeugt wird, am Ort des Hallsensors für diesen auswertbar modulieren. Der Positionsmesssensor 9 besteht aus zwei radial diametral zum Setzkolben 4 angeordneten Teilsensoren 14a, 14b, welche um eine viertel Periode P der Sensormarken 12 axial versetzt angeordnet sind.According to Fig. 2, the position measuring sensor 9 is formed as an incremental Hall sensor, the many, on the ferromagnetic setting piston 4 axially spaced with the period length P of 3 mm equidistantly spaced, rotationally symmetric sensor marks 12 in the form of narrow residual webs between each two closely adjacent, circumferential grooves of each 0.5 mm deep and 2.5 mm wide formed, which modulate a permanent magnetic field H, which is generated by an adjacent to the Hall sensor, toroidal permanent magnet 13, 13a, at the location of the Hall sensor for this evaluable. The position measuring sensor 9 consists of two partial sensors 14a, 14b which are arranged radially diametrically to the setting piston 4 and which are arranged offset axially by a quarter period P of the sensor marks 12.

Claims (10)

  1. A bolt-driving gun with a setting piston (4), which is driven by an expanding propellent gas in a combustion chamber (2), for driving a nail bolt (5) into a substrate (6) in a single operation, and with setting depth control, characterized in that it has a control circuit (I) with control electronics (7), means (8) for adjusting the setting depth (T), a position-measuring sensor (9) for determining the position of the bottom dead centre of motion (uTP) of the setting piston (4), and control means (10) for the independent adjustment of the kinetic energy of the setting piston (4) for the next driving-in operation.
  2. A bolt-driving gun according to Claim 1, characterized in that the control means (10) take the form of an electrically controllable, mechanical actuator, which is optionally designed for varying the quantity of propellant, the mixture ratio, the volume of the combustion chamber, the discharging devices for the propellent gas or the position of the damping elements.
  3. A bolt-driving gun according to Claim 1 or 2, characterized in that the position-measuring sensor (9) takes the form of an incremental sensor with a plurality of sensor marks (12) being spaced equidistantly in axial direction on the setting piston (4) and optionally so as to be rotationally symmetrical, said incremental sensor being connected to a counting device (n) which is optionally integrated in the control electronics (7).
  4. A bolt-driving gun according to Claim 3, characterized in that the incremental sensor is a magnetic-field-sensitive semiconductor sensor associated with projections or recesses forming sensor marks (12) on the setting piston (4), said sensor marks (12) modulating a permanent magnetic field (H) at the location of the semiconductor sensor so that it can be evaluated thereby.
  5. A bolt-driving gun according to Claim 4, characterized in that the sensor marks (12) take the form of narrow residual webs respectively located between two closely adjacent circumferential grooves.
  6. A bolt-driving gun according to one of Claims 3 to 5, characterized in that the incremental sensor consists of at least two sensor components (14a, 14b), which are connected to one another in antiphase for the purpose of measuring a differential measurement result.
  7. A bolt-driving gun according to one of Claims 3 to 6, characterized in that two sensor components (14a, 14b) are offset relative to one another in axial direction by a quarter period (P) of the sensor marks (12).
  8. A bolt-driving gun according to one of the preceding claims, characterized in that a timer (t) is associated with the position-measuring sensor (9).
  9. A method of controlling the setting depth (T) of a nail bolt (5) driven into a substrate by a bolt-driving gun (1) in just one operation, characterized in that in a first step the driving-in operation is initiated by operating the control switch (11); in a second step the position of the setting piston (4) is repeatedly measured by the position-measuring sensor (9) during the driving-in operation and as a consequence the position of the bottom dead centre of motion (uTP) is determined by the control electronics, this being correlated with the setting depth (T) of the nail bolt (5); in a third step, a controller output for the control means (10) for varying the kinetic energy of the setting piston (4) is determined by the control electronics (7) from the position of the bottom dead centre of motion (uTP) and the desired value of the setting depth (T) for the next setting operation, and said controller output is temporarily stored as the setting for the next driving-in operation; in a fourth step the adjustment is made for the next driving-in operation and in the following steps, steps one to four are periodically repeated.
  10. A method according to Claim 9, characterized in that in the third step the setting depth (T) and optionally a calculated hardness of the substrate (6) is numerically indicated in a display.
EP01810717A 2001-07-19 2001-07-19 Bolt driving tool with setting depth control Expired - Lifetime EP1277548B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP01810717A EP1277548B1 (en) 2001-07-19 2001-07-19 Bolt driving tool with setting depth control
DE50109817T DE50109817D1 (en) 2001-07-19 2001-07-19 Bolt setting tool with setting depth control
AU52745/02A AU784939B2 (en) 2001-07-19 2002-07-01 Setting tool with a setting depth control
US10/197,174 US6679410B2 (en) 2001-07-19 2002-07-16 Setting tool with a setting depth control
CNB02126189XA CN1289264C (en) 2001-07-19 2002-07-18 Pin mounting device with mounting depth regulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01810717A EP1277548B1 (en) 2001-07-19 2001-07-19 Bolt driving tool with setting depth control

Publications (2)

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EP1277548A1 EP1277548A1 (en) 2003-01-22
EP1277548B1 true EP1277548B1 (en) 2006-05-17

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EP01810717A Expired - Lifetime EP1277548B1 (en) 2001-07-19 2001-07-19 Bolt driving tool with setting depth control

Country Status (5)

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US (1) US6679410B2 (en)
EP (1) EP1277548B1 (en)
CN (1) CN1289264C (en)
AU (1) AU784939B2 (en)
DE (1) DE50109817D1 (en)

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CN1398702A (en) 2003-02-26
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US20030015088A1 (en) 2003-01-23
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