EP3393711A1 - Combustion-powered placing tool and method for operating such a placing tool - Google Patents

Combustion-powered placing tool and method for operating such a placing tool

Info

Publication number
EP3393711A1
EP3393711A1 EP16812759.5A EP16812759A EP3393711A1 EP 3393711 A1 EP3393711 A1 EP 3393711A1 EP 16812759 A EP16812759 A EP 16812759A EP 3393711 A1 EP3393711 A1 EP 3393711A1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
main combustion
ignition
piston
setting
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.)
Granted
Application number
EP16812759.5A
Other languages
German (de)
French (fr)
Other versions
EP3393711B1 (en
Inventor
Norbert Heeb
Peter Bruggmueller
Dominik Schmidt
Tilo Dittrich
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 EP3393711A1 publication Critical patent/EP3393711A1/en
Application granted granted Critical
Publication of EP3393711B1 publication Critical patent/EP3393711B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C5/00—Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor
    • B25C5/10—Driving means
    • B25C5/15—Driving means operated by electric power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/10—Means for driving the impulse member comprising a built-in internal-combustion engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/02—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for hand-held tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B19/00—Engines characterised by precombustion chambers
    • F02B19/12—Engines characterised by precombustion chambers with positive ignition

Definitions

  • the invention relates to a combustion-powered setting tool for driving fasteners into a substrate, having at least one main combustion chamber for a fuel, with a driving piston which is fully retracted in a starting position and can be driven via dispersible gases from the main combustion chamber in the setting direction, and with a Prechamber, which is associated with an ignition device and in which a pressure acting on the main combustion chamber pressure is buildable before the ignition of a fuel-air mixture in the main combustion chamber, wherein the main combustion chamber is associated with a further ignition device.
  • the invention further relates to a method for operating such a combustion-powered setting tool.
  • German patent application DE 42 43 36 17 A1 discloses a portable, combustion-powered working device, in particular a setting device for fastening elements, with a cylindrical combustion chamber for combustion of an air-fuel mixture, whereby a plunger via a guided through the combustion cylinder piston is drivable, wherein a remote from the combustion chamber lower surface of the piston associated with the prechamber is provided in the compression of the air-fuel mixture in the combustion chamber, an ignition-induced combustion process of an air-fuel mixture can be triggered.
  • the object of the invention is the effectiveness and / or functionality when driving fasteners with a combustion-powered setting tool, with a driving piston, which is fully retracted in a starting position and is driven by exandierbare gases from the main combustion chamber in the setting direction, and with an antechamber, an ignition device is assigned and in the prior to the ignition of a fuel-air mixture in the main combustion chamber, a pressure acting on the main combustion pressure is buildable, wherein the main combustion chamber is associated with a further ignition device to improve.
  • the object is in a combustion-powered setting tool for driving fasteners into a substrate, with at least one main combustion chamber for a compressible fuel, with a driving piston, which is fully retracted in a starting position and is driven by exandierbare gases from the main combustion chamber in the setting direction, and with a Prechamber, which is associated with an ignition device and in which a pressure acting on the main combustion chamber pressure is buildable before the ignition of a fuel-air mixture in the main combustion chamber, wherein the main combustion chamber is associated with a further ignition device, achieved in that the setting device comprises a selector, which can be chosen between a low energy operation with an ignition in the main combustion chamber and a high energy operation with an ignition in the pre-chamber.
  • the drive piston of the setting device can be accelerated out of its initial position either with relatively little energy in low-energy operation or with relatively high energy in high-energy operation.
  • the drive piston is in its initial position, so to speak in a rear dead center.
  • a preferred embodiment of the combustion-powered setting tool is characterized in that the setting device comprises a control device which is provided with at least one sensor device for pressure, temperature and / or travel detection in / near the prechamber and / or at least one sensor device in / near the Main combustion chamber is connected. After ignition of a gas mixture in the pre-chamber, a subsequent ignition in the main combustion chamber can be controlled very precisely and effectively with the aid of the control device and the sensor device or the sensor devices.
  • the setting device comprises a reset device, which is connected to the control device of the main combustion chamber / prechamber, in order for a piston malfunction by ignition in the main combustion chamber / prechamber back dividing the driving piston to its original position cause.
  • the drive piston In the case of a piston malfunction, the drive piston is not automatically reset to its original position due to the error. If an operator of the setting device detects such a piston malfunction, the operator can easily cause a reset of the driving piston in its initial position via the reset device. Depending on the design of the setting device, the fault, for example by a corresponding path detection, also be detected automatically. Then, the return part of the drive piston in its initial position can also be effected automatically via the reset device.
  • a further preferred embodiment of the combustion-powered setting tool is characterized in that the setting device comprises an adjusting device with which a desired value of a pressure, temperature, displacement and / or time control can be manually set or varied.
  • a setting process can be influenced individually with the setting device.
  • the desired value of the pressure, temperature, displacement and / or time control can be set automatically via the control device, for example by evaluating a previous setting.
  • the combustion-powered setting tool is characterized in that the setting device in addition to the low-energy operation and the high-energy operation has at least one further operating mode in which a piston malfunction is detected and / or eliminated.
  • the piston malfunction can be detected, for example, by an operator and eliminated by actuating the reset device.
  • the piston malfunction can also be detected automatically, for example by a corresponding path detection, and then eliminated manually by actuating the reset device.
  • the piston malfunction can also be detected automatically and eliminated automatically via the reset device.
  • a further preferred embodiment of the combustion-powered setting tool is characterized in that the setting tool in addition to the low-energy operation and the high-energy operation has at least one further operating mode in which initially a gas mixture is ignited by the ignition of the pre-chamber, after which Gas mixture in the main combustion chamber time, pressure, away and / or temperature controlled by the further ignition device is ignited.
  • a pre-combustion chamber establishes a defined admission pressure in the main combustion chamber and, at a certain point in time, ignites the main combustion chamber through the further ignition device.
  • timed ignition for example, a defined offset is selected between the prechamber ignition and the main combustion chamber ignition.
  • the pressure in the pre-chamber or in the main combustion chamber is advantageously measured with the aid of the respectively associated sensor device.
  • the main combustion chamber is then ignited with the further ignition device as soon as a certain pressure level is reached.
  • a propagation path of a flame after prechamber ignition is measured, for example, via thermal / optical sensors.
  • An ignition of the main combustion chamber is then advantageously triggered by the further ignition device when the flame has reached, for example, two-thirds of its way to overflow openings between the prechamber and the main combustion chamber.
  • a path of a slide or of the drive piston or a force acting on the slide can be measured.
  • a further preferred embodiment of the combustion-powered setting tool is characterized in that the main combustion chamber is associated with a vent valve device which allows for a piston malfunction during a secondary ignition in the main combustion chamber, a pressure equalization with the environment. After a first ignition in the main combustion chamber, a piston malfunction can occur. This piston malfunction is eliminated by the secondary ignition in the main combustion chamber. During secondary ignition in the main combustion chamber, a pressure equalization with the environment is carried out via the venting valve device. Thereafter, the vent valve device is closed. During the subsequent cooling of the combustion gases in the main combustion chamber of the driving piston is withdrawn by a negative pressure in the main combustion chamber to the rear to its original position. The vent valve device is closed during normal operation.
  • the prechamber of the setting device described above is preferably connected or connectable to an environment of the prechamber via at least one passage opening, which can be closed by a control device, wherein the control device is advantageously connected to the main combustion chamber in terms of control pressure.
  • the above object is achieved alternatively or additionally by a method for operating a previously described combustion-powered setting device.
  • the setting device can be operated in high energy operation with a pre-combustion and a subsequent main combustion in the main combustion chamber.
  • the setting device can also be operated in the low energy mode, which corresponds to a normal conventional operation, without pre-combustion with the help of the further ignition device with only a combustion in the main combustion chamber.
  • the drive piston in the setting device described above can be returned in an undesirable piston malfunction in a simple manner back to its original position.
  • the admission pressure is set, for example, by time, path temperature or pressure.
  • a preferred embodiment of the method is characterized in that the piston malfunction, in particular by a Kolbenweger linear, automatically detected and an ignition in the pre-chamber or in the main combustion chamber is introduced to return the drive piston to its original position. This considerably simplifies the operation of the setting device. The return of the drive piston to its initial position can be initiated automatically or manually.
  • a further preferred embodiment of the method is characterized in that the main combustion chamber is purged in a piston malfunction, after which the driving piston is reset with an ignition in the main combustion chamber by setting in the low-energy operation in its initial position.
  • the return of the drive piston to its initial position is advantageously carried out in a thermal manner, when a negative pressure is created during cooling after the secondary ignition in the main combustion chamber.
  • the invention also relates to a computer program product with a program code for carrying out a method described above, in particular if the program is executed in the control of the setting device.
  • Figure 1 is a simplified representation of a combustion-powered setting tool in longitudinal section shortly after ignition in a pre-chamber in a high-energy operation in longitudinal section;
  • FIG. 2 shows the setting device from FIG. 1 in a low-energy operation, shortly after ignition in a main combustion chamber
  • Figure 3 is a similar setting device as in Figures 1 and 2 with an electrical control device which is connected to sensor devices, and
  • Figure 4 the setting tool of Figures 1 and 2 at a piston malfunction and subsequent ignition of a main combustion chamber.
  • a setting device 1 is shown greatly simplified in a longitudinal section in different operating states.
  • the setting device 1 shown in FIGS. 1, 2 and 4 can be operated with a fuel gas or with an evaporable liquid fuel.
  • the setting device 1 comprises a housing 3 with a master cylinder 5, which limits a main combustion chamber 6.
  • the main combustion chamber 6 can be supplied via an inlet device 8 gas and / or air.
  • a driving piston 10 in the figures 1, 2 and 4 is moved back and forth guided downwards and upwards.
  • the driving piston 10 comprises a piston rod 1 1, which starts from a piston head 12.
  • a facing away from the piston head 12 setting end 14 of the piston rod 1 1 is arranged in a (not shown) bolt guide, which serves to guide fasteners, which are also referred to as bolts.
  • the setting end 14 of the piston rod 1 1 of the driving piston 10 is shown cut off.
  • the bolt guide with the piston rod 1 1 arranged therein of the driving piston 10 is also referred to as a network.
  • a fastener such as a nail, bolts or the like, are driven into a (not shown) underground.
  • the setting tool 1 is pressed with his pin guide to the ground and triggered.
  • a switch which also as Trigger switch is called.
  • the switch is provided, for example, on a (also not shown) handle of the setting device 1.
  • a setting direction is indicated in Figures 1, 2 and 4.
  • the driving piston 10 is moved from its initial position shown in FIGS. 1 and 2, which corresponds to a top dead center, into an end position which corresponds to a bottom dead center.
  • a movement of the drive piston 10 in Figures 1, 2 and 4 upwards is limited by a housing-fixed piston stop 16.
  • the piston stop 16 By the piston stop 16, the top dead center of the driving piston 10 is defined.
  • the piston stop 16 may be combined with a magnetic device 17.
  • the magnetic device 17 serves, for example, to hold the driving piston 10 with a predetermined holding force in its starting position shown in FIGS. 1 and 2. Movement of the drive piston 10 downwards is limited by one or more stop and / or damping elements 28, 29.
  • the stop and / or damping elements 28 are designed, for example, as a buffer.
  • the piston head 12 comprises a first piston surface 21, which faces the main combustion chamber 6.
  • the prechamber cylinder 24 is arranged within the housing 3 of the setting device 1.
  • the prechamber 25 represents a pre-combustion chamber to which an ignition device 26 and an inlet device 27 are assigned.
  • the stop and / or damping elements 28, 29 are arranged in the antechamber 25.
  • air or a fuel gas-air mixture is supplied, which is ignited by means of the ignition device 26 in the prechamber 25, as indicated in Figure 1 by a symbol 60.
  • the pre-chamber cylinder 24 comprises two passage openings 31, 32, which allow, for example, the exit of exhaust gases from the pre-chamber 25.
  • the passage openings 31, 32nd are closed by a control device 30 depending on demand.
  • the control device 30 comprises a control sleeve 34, which has two passage openings 37, 38.
  • control sleeve 34 has substantially the shape of a straight circular cylinder jacket and is in Figures 1, 2 and 4 movable downwards and upwards.
  • the overflow openings 41, 42 are each assigned a valve device 43, 44.
  • the valve devices 43, 44 are, for example, valve flaps which are opened in FIGS. 1 and 2 in order to allow passage of the ignited air-fuel mixture from the prechamber 25 into the main combustion chamber 6.
  • the valve means 43, 44 are closed.
  • the control device 30 comprises a control pressure surface 45, which is connected in terms of pressure with the main combustion chamber 6.
  • the control pressure surface 45 is designed as an annular surface 46, which faces radially outside of the prechamber cylinder 24 of the main combustion chamber 6.
  • the control pressure surface 45 is mechanically coupled to the control sleeve 34 via a coupling element.
  • the coupling element is designed as a slide 50, which is guided in the figures 1, 2 and 4 down and up and forth to the antechamber cylinder 24 movable.
  • the upper end 51 of the slider 50 which is designed as an annular surface 46 control pressure surface 45 is provided.
  • the control sleeve 34 is attached.
  • the control device 30 further comprises spring devices 54, 55, which are designed, for example, as helical compression springs.
  • the lower ends of the spring devices 54, 55 in FIGS. 1, 2 and 4 are each assigned a cylindrical stop 56, 57.
  • the housing-fixed stops 56, 57 are provided on the prechamber cylinder 24.
  • the spring devices 54, 55 are clamped between the cylinder-fixed stops 56, 57 and the upper end 51 of the slider 50 with the control pressure surface 45.
  • the slider 50 is supported by the spring means 54, 55 on the cylinder-fixed stops 56, 57.
  • the setting tool 1 is shown shortly after the ignition 60 in the pre-chamber 25.
  • the ignited mixture passes through the open valve means 43, 44 through the overflow openings 41, 42 in the main combustion chamber 6.
  • the passage openings 31, 32 of the pre-chamber 25 are closed by the control sleeve 34.
  • the driving piston 10 is in its initial position or initial position in a rear dead center. In this initial position or starting position of the driving piston 10 is fully retracted into the housing 3. In the starting position or starting position, the piston head 12 of the drive piston 10 abuts against the cylinder-fixed piston stop 16.
  • the setting device 1 shown in Figures 1 to 4; 101 can be operated in various modes or modes of operation.
  • a gas mixture in particular a fuel-air mixture, is metered into both the prechamber 25 and the main combustion chamber 6.
  • a first ignition is carried out by the ignition device 26 in the pre-chamber 25th
  • a selection device, a control device, a reset device and an adjusting device are indicated symbolically by a total of four rectangles 81 to 84.
  • the control device 82 may be provided as an alternative or in addition to the control device 30.
  • the control device 82 preferably also serves to display the various operating modes of the setting device 1.
  • the reset device 83 advantageously serves to initiate a piston fault removal of the setting device 1 if necessary.
  • the adjusting device 84 is advantageously used to manually set or vary a desired value of a pressure, temperature, displacement and / or time control.
  • the ignition in the antechamber 25 is indicated by a symbol 60. The combustion then spreads in the direction of the main combustion chamber 6 and ignites them by the valve means 43, 44, which are designed as pollströmventile.
  • FIG. 2 shows that in a low-energy operation of the setting device 1, injection and ignition take place only in the main combustion chamber 6.
  • the ignition in the main combustion chamber 6 is carried out by the further ignition device 76, as indicated by a symbol 90.
  • the spring bias of the spring devices 54, 55 In low power operation, it is possible to adjust the spring bias of the spring devices 54, 55, in particular to reduce. By reducing the spring preload can be prevented in a simple manner that the driving piston 10 runs in low energy operation on a gas cushion.
  • the adjustment of the spring preload can be represented, for example, by means of a screw thread between the stops fixed to the housing 56, 57 and the antechamber cylinder 24.
  • FIG. 3 shows a setting device 101 with a control device 105 which replaces the control devices 30, 82 in FIGS. 1, 2 and 4.
  • the setting device 101 further comprises a sensor device 106 which is associated with the pre-chamber 25.
  • the setting device 101 comprises a sensor device 107 which is associated with the main combustion chamber 6.
  • the control device 105 is connected via a control line 1 1 1 with the further ignition device 76. Furthermore, the control device 105 is connected to the sensor device 106 via a control line 1 12. In addition, the control device 105 is connected via a control line 1 13 with the sensor device 107.
  • the sensor devices 106, 107 are travel, time, pressure or temperature sensors.
  • the control device 105 is preferably an electronic controller. From a predetermined desired value, which is adjusted via the control device 105, the ignition takes place in the main combustion chamber 6 by means of the ignition device 76 therein, which is designed for example as a spark plug.
  • the set point can either be set by a user or set automatically, for example by evaluating a previous setting.
  • a defined admission pressure in the main combustion chamber 6 is initially established by the prechamber combustion. Then, the ignition device 76 is ignited via the control device 105 at the defined time. In the case of a pressure-controlled ignition, the pressure is measured via the sensor device 106 in the prechamber 25 and / or via the sensor device 107 in the main combustion chamber 6. Then the main combustion chamber 6 is ignited from a certain pressure level.
  • FIG. 4 shows the setting device 1 from FIGS. 1 and 2 with a piston malfunction.
  • the drive piston is shown cut off at its end facing away from the piston head 12.
  • the piston head 12 of the drive piston 10 is arranged slightly below the housing-fixed stops 56, 57.
  • the piston malfunction can be eliminated according to different variants.
  • the driving piston 10 is returned to its original position or initial position after an additional ignition cycle in the main combustion chamber 6.
  • the valve device 75 is used for venting the main combustion chamber 6.
  • a symbol 120 a secondary ignition in the main combustion chamber 6 is indicated, which is initiated by the further ignition device 76.
  • valve device 75 By arrows 121, 122 it is indicated that a pressure equalization between the main combustion chamber 6 and the environment via the open valve device 75 is performed. A final cooling of the combustion gases in the main combustion chamber 6 results in closed valve device 75 by the associated negative pressure formation in the main combustion chamber 6 that the driving piston 10 is pulled in Figure 4 upwards to its original position. In normal operation, the valve device 75 is closed. The piston misfire removal is triggered, for example, by operation of the reset device 83. Upon actuation of the reset device 83, the additional ignition or secondary ignition 120 of the main combustion chamber 6 is initiated. If the proportion of residual gas in the main combustion chamber 6 is too high, the valve device 75 of the main combustion chamber 6 is advantageously opened in order to allow purging of the main combustion chamber 6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

The invention relates to a combustion-powered placing tool (1) for driving fastening elements into a subsurface, comprising at least one main combustion chamber (6) for a compressible fuel, a driving piston (10), which in a starting position is completely retracted, and which can be driven from the main combustion chamber (6) in the placing direction (15) via expandable gases, a prechamber (25), to which an ignition device (26) is assigned, and in which a pressure acting upon the main combustion chamber (6) can be build up prior to the ignition of a fuel-air mixture in the main combustion chamber (6), wherein an additional ignition device (76) is assigned to the main combustion chamber (6). In order to improve the effectiveness and/or the functionality during the driving-in of fastening means, the placing tool (1) comprises a selector device (81), by way of which a selection between a reduced energy operation having an ignition in the main combustion chamber (6) and a high-energy operation having an ignition in the prechamber (25) can be made.

Description

Hilti Aktiengesellschaft in Schaan Fürstentum Liechtenstein  Hilti Aktiengesellschaft in Schaan Principality of Liechtenstein
Brennkraftbetriebenes Setzgerät und Verfahren zum Betreiben eines derartigen Internal combustion setting device and method for operating such
Setzgeräts  setting tool
Technisches Gebiet Die Erfindung betrifft ein brennkraftbetriebenes Setzgerät zum Eintreiben von Befestigungselementen in einen Untergrund, mit mindestens einer Hauptbrennkammer für einen Brennstoff, mit einem Treibkolben, der in einer Ausgangslage vollständig eingefahren ist und über exandierbare Gase aus der Hauptbrennkammer in Setzrichtung antreibbar ist, und mit einer Vorkammer, der eine Zündeinrichtung zugeordnet ist und in der vor der Zündung eines Brennstoff-Luft-Gemischs in der Hauptbrennkammer ein auf die Hauptbrennkammer wirkender Druck aufbaubar ist, wobei der Hauptbrennkammer eine weitere Zündeinrichtung zugeordnet ist. Die Erfindung betrifft des Weiteren ein Verfahren zum Betreiben eines derartigen brennkraftbetriebenen Setzgeräts. TECHNICAL FIELD The invention relates to a combustion-powered setting tool for driving fasteners into a substrate, having at least one main combustion chamber for a fuel, with a driving piston which is fully retracted in a starting position and can be driven via dispersible gases from the main combustion chamber in the setting direction, and with a Prechamber, which is associated with an ignition device and in which a pressure acting on the main combustion chamber pressure is buildable before the ignition of a fuel-air mixture in the main combustion chamber, wherein the main combustion chamber is associated with a further ignition device. The invention further relates to a method for operating such a combustion-powered setting tool.
Stand der Technik Aus der deutschen Offenlegungsschrift DE 42 43 36 17 A1 ist ein tragbares, brennkraftbetriebenes Arbeitsgerät, insbesondere ein Setzgerät für Befestigungselemente bekannt, mit einer zylinderförmigen Brennkammer zur Verbrennung eines Luft-Brennstoff- Gemischs, wodurch über einen durch den Brennkammerzylinder geführten Kolben ein Stößel antreibbar ist, wobei eine mit der Brennkammer abgekehrten Unterfläche des Kolbens in Verbindung stehende Vorkammer vorgesehen ist, in der zur Kompression des Luft- Brennstoff-Gemischs in der Brennkammer ein zündungsinduzierter Verbrennungsprozess eines Luft-Brennstoff-Gemischs auslösbar ist. Darstellung der Erfindung The German patent application DE 42 43 36 17 A1 discloses a portable, combustion-powered working device, in particular a setting device for fastening elements, with a cylindrical combustion chamber for combustion of an air-fuel mixture, whereby a plunger via a guided through the combustion cylinder piston is drivable, wherein a remote from the combustion chamber lower surface of the piston associated with the prechamber is provided in the compression of the air-fuel mixture in the combustion chamber, an ignition-induced combustion process of an air-fuel mixture can be triggered. Presentation of the invention
Aufgabe der Erfindung ist es, die Effektivität und/oder die Funktionalität beim Eintreiben von Befestigungselementen mit einem brennkraftbetriebenen Setzgerät, mit einem Treibkolben, der in einer Ausgangslage vollständig eingefahren ist und über exandierbare Gase aus der Hauptbrennkammer in Setzrichtung antreibbar ist, und mit einer Vorkammer, der eine Zündeinrichtung zugeordnet ist und in der vor der Zündung eines Brennstoff-Luft-Gemischs in der Hauptbrennkammer ein auf die Hauptbrennkammer wirkender Druck aufbaubar ist, wobei der Hauptbrennkammer eine weitere Zündeinrichtung zugeordnet ist, zu verbessern. The object of the invention is the effectiveness and / or functionality when driving fasteners with a combustion-powered setting tool, with a driving piston, which is fully retracted in a starting position and is driven by exandierbare gases from the main combustion chamber in the setting direction, and with an antechamber, an ignition device is assigned and in the prior to the ignition of a fuel-air mixture in the main combustion chamber, a pressure acting on the main combustion pressure is buildable, wherein the main combustion chamber is associated with a further ignition device to improve.
Die Aufgabe ist bei einem brennkraftbetriebenen Setzgerät zum Eintreiben von Befestigungselementen in einen Untergrund, mit mindestens einer Hauptbrennkammer für einen kompressiblen Brennstoff, mit einem Treibkolben, der in einer Ausgangslage vollständig eingefahren ist und über exandierbare Gase aus der Hauptbrennkammer in Setzrichtung antreibbar ist, und mit einer Vorkammer, der eine Zündeinrichtung zugeordnet ist und in der vor der Zündung eines Brennstoff-Luft-Gemischs in der Hauptbrennkammer ein auf die Hauptbrennkammer wirkender Druck aufbaubar ist, wobei der Hauptbrennkammer eine weitere Zündeinrichtung zugeordnet ist, dadurch gelöst, dass das Setzgerät eine Wähleinrichtung umfasst, über die zwischen einem Schwachenergiebetrieb mit einer Zündung in der Hauptbrennkammer und einem Hochenergiebetrieb mit einer Zündung in der Vorkammer gewählt werden kann. Durch die Kombination der beiden Zündeinrichtungen mit der Wähleinrichtung kann der Treibkolben des Setzgeräts entweder im Schwachenergiebetrieb mit relativ wenig Energie oder im Hochenergiebetrieb mit relativ viel Energie aus seiner Ausgangslage heraus beschleunigt werden. Dadurch wird der Betrieb des brennkraftbetriebenen Setzgeräts beim Befestigen von Befestigungselementen in verschiedene Untergrundarten erheblich vereinfacht. Der Treibkolben befindet sich in seiner Ausgangslage sozusagen in einem hinteren Totpunkt. The object is in a combustion-powered setting tool for driving fasteners into a substrate, with at least one main combustion chamber for a compressible fuel, with a driving piston, which is fully retracted in a starting position and is driven by exandierbare gases from the main combustion chamber in the setting direction, and with a Prechamber, which is associated with an ignition device and in which a pressure acting on the main combustion chamber pressure is buildable before the ignition of a fuel-air mixture in the main combustion chamber, wherein the main combustion chamber is associated with a further ignition device, achieved in that the setting device comprises a selector, which can be chosen between a low energy operation with an ignition in the main combustion chamber and a high energy operation with an ignition in the pre-chamber. By combining the two ignition devices with the selector device, the drive piston of the setting device can be accelerated out of its initial position either with relatively little energy in low-energy operation or with relatively high energy in high-energy operation. As a result, the operation of the combustion-powered setting device when attaching fasteners in different types of substrates is greatly simplified. The drive piston is in its initial position, so to speak in a rear dead center.
Ein bevorzugtes Ausführungsbeispiel des brennkraftbetriebenen Setzgeräts ist dadurch gekennzeichnet, dass das Setzgerät eine Steuereinrichtung umfasst, die mit mindestens einer Sensoreinrichtung zur Druck-, Temperatur- und/oder Wegerfassung in/nahe bei der Vorkammer und/oder mit mindestens einer Sensoreinrichtung in/nahe bei der Hauptbrennkammer verbunden ist. Nach einer Zündung eines Gasgemischs in der Vorkammer kann eine anschließende Zündung in der Hauptbrennkammer mit Hilfe der Steuereinrichtung und der Sensoreinrichtung beziehungsweise der Sensoreinrichtungen sehr genau und effektiv gesteuert werden. Ein weiteres bevorzugtes Ausführungsbeispiel des brennkraftbetriebenen Setzgeräts ist dadurch gekennzeichnet, dass das Setzgerät eine Reseteinrichtung umfasst, die steuerungsmäßig mit der Zündeinrichtung der Hauptbrennkammer/Vorkammer verbunden ist, um bei einem Kolbenfehlstand durch eine Zündung in der Hauptbrennkammer/Vorkammer ein Rücksteilen des Treibkolbens in seine Ausgangslage zu bewirken. Bei einem Kolbenfehlstand wird der Treibkolben fehlerbedingt nicht automatisch in seiner Ausgangslage zurückgestellt. Wenn eine Bedienperson des Setzgeräts einen solchen Kolbenfehlstand feststellt, kann die Bedienperson über die Reseteinrichtung auf einfache Art und Weise ein Zurückstellen des Treibkolbens in seiner Ausgangslage veranlassen. Je nach Ausführung des Setzgeräts kann der Fehlstand, zum Beispiel durch eine entsprechende Wegerfassung, auch automatisch erkannt werden. Dann kann das Rücksteilen des Treibkolbens in seiner Ausgangslage auch automatisch über die Reseteinrichtung bewirkt werden. A preferred embodiment of the combustion-powered setting tool is characterized in that the setting device comprises a control device which is provided with at least one sensor device for pressure, temperature and / or travel detection in / near the prechamber and / or at least one sensor device in / near the Main combustion chamber is connected. After ignition of a gas mixture in the pre-chamber, a subsequent ignition in the main combustion chamber can be controlled very precisely and effectively with the aid of the control device and the sensor device or the sensor devices. A further preferred embodiment of the combustion-powered setting tool is characterized in that the setting device comprises a reset device, which is connected to the control device of the main combustion chamber / prechamber, in order for a piston malfunction by ignition in the main combustion chamber / prechamber back dividing the driving piston to its original position cause. In the case of a piston malfunction, the drive piston is not automatically reset to its original position due to the error. If an operator of the setting device detects such a piston malfunction, the operator can easily cause a reset of the driving piston in its initial position via the reset device. Depending on the design of the setting device, the fault, for example by a corresponding path detection, also be detected automatically. Then, the return part of the drive piston in its initial position can also be effected automatically via the reset device.
Ein weiteres bevorzugtes Ausführungsbeispiel des brennkraftbetriebenen Setzgeräts ist dadurch gekennzeichnet, dass das Setzgerät eine Stelleinrichtung umfasst, mit der ein Sollwert einer Druck-, Temperatur-, Weg- und/oder Zeitsteuerung manuell eingestellt beziehungsweise variiert werden kann. Dadurch kann ein Setzvorgang mit dem Setzgerät individuell beeinflusst werden. Alternativ oder zusätzlich kann der Sollwert der Druck-, Temperatur-, Weg- und/oder Zeitsteuerung automatisch über die Steuereinrichtung festgelegt werden, zum Beispiel durch Auswerten einer vorherigen Setzung. A further preferred embodiment of the combustion-powered setting tool is characterized in that the setting device comprises an adjusting device with which a desired value of a pressure, temperature, displacement and / or time control can be manually set or varied. As a result, a setting process can be influenced individually with the setting device. Alternatively or additionally, the desired value of the pressure, temperature, displacement and / or time control can be set automatically via the control device, for example by evaluating a previous setting.
Ein weiteres bevorzugtes Ausführungsbeispiel des brennkraftbetriebenen Setzgeräts ist dadurch gekennzeichnet, dass das Setzgerät zusätzlich zu dem Schwachenergiebetrieb und dem Hochenergiebetrieb mindestens eine weitere Betriebsart aufweist, in welcher ein Kolbenfehlstand erkannt und/oder beseitigt wird. Dabei kann der Kolbenfehlstand zum Beispiel durch eine Bedienperson erkannt und durch Betätigen der Reseteinrichtung beseitigt werden. Der Kolbenfehlstand kann aber auch automatisch, zum Beispiel durch eine entsprechende Wegerfassung, erkannt und daraufhin manuell durch Betätigen der Reseteinrichtung beseitigt werden. Der Kolbenfehlstand kann aber auch automatisch erkannt und automatisch über die Reseteinrichtung beseitigt werden. Ein weiteres bevorzugtes Ausführungsbeispiel des brennkraftbetriebenen Setzgeräts ist dadurch gekennzeichnet, dass das Setzgerät zusätzlich zu dem Schwachenergiebetrieb und dem Hochenergiebetrieb mindestens eine weitere Betriebsart aufweist, in welcher zunächst ein Gasgemisch durch die Zündeinrichtung der Vorkammer gezündet wird, wonach das Gasgemisch in der Hauptbrennkammer zeit-, druck-, weg- und/oder temperaturgesteuert durch die weitere Zündeinrichtung gezündet wird. Hierbei wird zum Beispiel durch eine Vorkammerverbrennung ein definierter Vordruck in der Hauptbrennkammer aufgebaut und zu einem gewissen Zeitpunkt die Hauptbrennkammer durch die weitere Zündeinrichtung gezündet. Bei der zeitgesteuerten Zündung wird beispielsweise ein definiertes Offset zwischen der Vorkammerzündung und der Hauptbrennkammerzündung gewählt. Bei einer druckgesteuerten Zündung wird vorteilhaft der Druck in der Vorkammer oder in der Hauptbrennkammer mit Hilfe der jeweils zugeordneten Sensoreinrichtung gemessen. Die Hauptbrennkammer wird dann mit der weiteren Zündeinrichtung gezündet, sobald ein gewisses Druckniveau erreicht ist. Bei einer weggesteuerten Zündung wird beispielsweise über thermische/optische Sensoren ein Ausbreitungsweg einer Flamme nach der Vorkammerzündung gemessen. Eine Zündung der Hauptbrennkammer wird vorteilhaft dann über die weitere Zündeinrichtung ausgelöst, wenn die Flamme zum Beispiel zwei Drittel ihres Weges bis zu Überströmöffnungen zwischen der Vorkammer und der Hauptbrennkammer erreicht hat. Alternativ oder zusätzlich kann ein Weg eines Schiebers beziehungsweise des Treibkolbens oder eine Kraft, die auf den Schieber wirkt, gemessen werden. Another preferred embodiment of the combustion-powered setting tool is characterized in that the setting device in addition to the low-energy operation and the high-energy operation has at least one further operating mode in which a piston malfunction is detected and / or eliminated. In this case, the piston malfunction can be detected, for example, by an operator and eliminated by actuating the reset device. However, the piston malfunction can also be detected automatically, for example by a corresponding path detection, and then eliminated manually by actuating the reset device. However, the piston malfunction can also be detected automatically and eliminated automatically via the reset device. A further preferred embodiment of the combustion-powered setting tool is characterized in that the setting tool in addition to the low-energy operation and the high-energy operation has at least one further operating mode in which initially a gas mixture is ignited by the ignition of the pre-chamber, after which Gas mixture in the main combustion chamber time, pressure, away and / or temperature controlled by the further ignition device is ignited. In this case, for example, a pre-combustion chamber establishes a defined admission pressure in the main combustion chamber and, at a certain point in time, ignites the main combustion chamber through the further ignition device. In timed ignition, for example, a defined offset is selected between the prechamber ignition and the main combustion chamber ignition. In the case of a pressure-controlled ignition, the pressure in the pre-chamber or in the main combustion chamber is advantageously measured with the aid of the respectively associated sensor device. The main combustion chamber is then ignited with the further ignition device as soon as a certain pressure level is reached. In the case of path-controlled ignition, a propagation path of a flame after prechamber ignition is measured, for example, via thermal / optical sensors. An ignition of the main combustion chamber is then advantageously triggered by the further ignition device when the flame has reached, for example, two-thirds of its way to overflow openings between the prechamber and the main combustion chamber. Alternatively or additionally, a path of a slide or of the drive piston or a force acting on the slide can be measured.
Ein weiteres bevorzugtes Ausführungsbeispiel des brennkraftbetriebenen Setzgeräts ist dadurch gekennzeichnet, dass der Hauptbrennkammer eine Entlüftungsventileinrichtung zugeordnet ist, die bei einem Kolbenfehlstand während einer Zweitzündung in der Hauptbrennkammer einen Druckausgleich mit der Umgebung ermöglicht. Nach einer ersten Zündung in der Hauptbrennkammer kann ein Kolbenfehlstand auftreten. Dieser Kolbenfehlstand wird durch die Zweitzündung in der Hauptbrennkammer beseitigt. Bei der Zweitzündung in der Hauptbrennkammer wird über die Entlüftungsventileinrichtung ein Druckausgleich mit der Umgebung durchgeführt. Danach wird die Entlüftungsventileinrichtung geschlossen. Beim anschließenden Abkühlen der Verbrennungsgase in der Hauptbrennkammer wird der Treibkolben durch eine Unterdruckbildung in der Hauptbrennkammer nach hinten in seine Ausgangslage zurückgezogen. Die Entlüftungsventileinrichtung ist im Normalbetrieb geschlossen. A further preferred embodiment of the combustion-powered setting tool is characterized in that the main combustion chamber is associated with a vent valve device which allows for a piston malfunction during a secondary ignition in the main combustion chamber, a pressure equalization with the environment. After a first ignition in the main combustion chamber, a piston malfunction can occur. This piston malfunction is eliminated by the secondary ignition in the main combustion chamber. During secondary ignition in the main combustion chamber, a pressure equalization with the environment is carried out via the venting valve device. Thereafter, the vent valve device is closed. During the subsequent cooling of the combustion gases in the main combustion chamber of the driving piston is withdrawn by a negative pressure in the main combustion chamber to the rear to its original position. The vent valve device is closed during normal operation.
Die Vorkammer des vorab beschriebenen Setzgeräts ist vorzugsweise über mindestens eine Durchtrittsöffnung, die durch eine Steuereinrichtung verschließbar ist, mit einer Umgebung der Vorkammer verbunden beziehungsweise verbindbar, wobei die Steuereinrichtung vorteilhaft steuerdruckmäßig mit der Hauptbrennkammer verbunden ist. Die oben angegebene Aufgabe ist alternativ oder zusätzlich durch ein Verfahren zum Betreiben eines vorab beschriebenen brennkraftbetriebenen Setzgeräts gelöst. Das Setzgerät kann im Hochenergiebetrieb mit einer Vorverbrennung und einer anschließenden Hauptverbrennung in der Hauptbrennkammer betrieben werden. Das Setzgerät kann aber auch im Schwachenergiebetrieb, welcher einem normalen herkömmlichen Betrieb entspricht, ohne Vorverbrennung mit Hilfe der weiteren Zündeinrichtung auch nur mit einer Verbrennung in der Hauptbrennkammer betrieben werden. Darüber hinaus kann der Treibkolben bei dem vorab beschriebenen Setzgerät bei einem unerwünschten Kolbenfehlstand auf einfache Art und Weise wieder in seine Ausgangslage zurückgebracht werden. Durch entsprechende Einstellung des Vordrucks kann das Setzgerät einfach in seiner Energie variiert werden. Die Einstellung des Vordrucks erfolgt zum Beispiel zeit-, weg- temperatur- oder druckgesteuert. The prechamber of the setting device described above is preferably connected or connectable to an environment of the prechamber via at least one passage opening, which can be closed by a control device, wherein the control device is advantageously connected to the main combustion chamber in terms of control pressure. The above object is achieved alternatively or additionally by a method for operating a previously described combustion-powered setting device. The setting device can be operated in high energy operation with a pre-combustion and a subsequent main combustion in the main combustion chamber. However, the setting device can also be operated in the low energy mode, which corresponds to a normal conventional operation, without pre-combustion with the help of the further ignition device with only a combustion in the main combustion chamber. In addition, the drive piston in the setting device described above can be returned in an undesirable piston malfunction in a simple manner back to its original position. By setting the form accordingly, the setting tool can be easily varied in its energy. The admission pressure is set, for example, by time, path temperature or pressure.
Ein bevorzugtes Ausführungsbeispiel des Verfahrens ist dadurch gekennzeichnet, dass der Kolbenfehlstand, insbesondere durch eine Kolbenwegerfassung, automatisch erkannt und eine Zündung in der Vorkammer oder in der Hauptbrennkammer eingeleitet wird, um den Treibkolben in seine Ausgangslage zurückzustellen. Dadurch wird der Betrieb des Setzgeräts erheblich vereinfacht. Das Zurückstellen des Treibkolbens in seine Ausgangslage kann automatisch oder manuell eingeleitet werden. A preferred embodiment of the method is characterized in that the piston malfunction, in particular by a Kolbenwegerfassung, automatically detected and an ignition in the pre-chamber or in the main combustion chamber is introduced to return the drive piston to its original position. This considerably simplifies the operation of the setting device. The return of the drive piston to its initial position can be initiated automatically or manually.
Ein weiteres bevorzugtes Ausführungsbeispiel des Verfahrens ist dadurch gekennzeichnet, dass die Hauptbrennkammer bei einem Kolbenfehlstand gespült wird, wonach der Treibkolben mit einer Zündung in der Hauptbrennkammer durch eine Setzung im Schwachenergiebetrieb in seine Ausgangslage zurückgestellt wird. Das Zurückstellen des Treibkolbens in seine Ausgangslage erfolgt dabei vorteilhaft auf thermische Art und Weise, wenn beim Abkühlen nach der Zweitzündung in der Hauptbrennkammer ein Unterdruck entsteht. Die Erfindung betrifft gegebenenfalls auch ein Computerprogrammprodukt mit einem Programmcode zum Durchführen eines vorab beschriebenen Verfahrens, insbesondere wenn das Programm in der Steuerung des Setzgeräts ausgeführt wird. A further preferred embodiment of the method is characterized in that the main combustion chamber is purged in a piston malfunction, after which the driving piston is reset with an ignition in the main combustion chamber by setting in the low-energy operation in its initial position. The return of the drive piston to its initial position is advantageously carried out in a thermal manner, when a negative pressure is created during cooling after the secondary ignition in the main combustion chamber. If appropriate, the invention also relates to a computer program product with a program code for carrying out a method described above, in particular if the program is executed in the control of the setting device.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung verschiedene Ausführungsbeispiele im Einzelnen beschrieben sind. Es zeigen: Figur 1 eine vereinfachte Darstellung eines brennkraftbetriebenen Setzgeräts im Längsschnitt kurz nach einer Zündung in einer Vorkammer in einem Hochenergiebetrieb im Längsschnitt; Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, various embodiments are described in detail. Show it: Figure 1 is a simplified representation of a combustion-powered setting tool in longitudinal section shortly after ignition in a pre-chamber in a high-energy operation in longitudinal section;
Figur 2 das Setzgerät aus Figur 1 in einem Schwachenergiebetrieb, kurz nach einer Zündung in einer Hauptbrennkammer; FIG. 2 shows the setting device from FIG. 1 in a low-energy operation, shortly after ignition in a main combustion chamber;
Figur 3 ein ähnliches Setzgerät wie in den Figuren 1 und 2 mit einer elektrischen Steuereinrichtung, die mit Sensoreinrichtungen verbunden ist, und Figure 3 is a similar setting device as in Figures 1 and 2 with an electrical control device which is connected to sensor devices, and
Figur 4 das Setzgerät aus den Figuren 1 und 2 bei einem Kolbenfehlstand und anschließender Zündung einer Hauptbrennkammer. Ausführungsbeispiele Figure 4, the setting tool of Figures 1 and 2 at a piston malfunction and subsequent ignition of a main combustion chamber. embodiments
In den Figuren 1 , 2 und 4 ist ein Setzgerät 1 stark vereinfacht in einem Längsschnitt in verschiedenen Betriebszuständen dargestellt. Das in den Figuren 1 , 2 und 4 dargestellte Setzgerät 1 kann mit einem Brenngas oder mit einem verdampfbaren Flüssigbrennstoff betrieben werden. Das Setzgeräts 1 umfasst ein Gehäuse 3 mit einem Hauptzylinder 5, der eine Hauptbrennkammer 6 begrenzt. Der Hauptbrennkammer 6 kann über eine Einlasseinrichtung 8 Gas und/oder Luft zugeführt werden. In Figures 1, 2 and 4, a setting device 1 is shown greatly simplified in a longitudinal section in different operating states. The setting device 1 shown in FIGS. 1, 2 and 4 can be operated with a fuel gas or with an evaporable liquid fuel. The setting device 1 comprises a housing 3 with a master cylinder 5, which limits a main combustion chamber 6. The main combustion chamber 6 can be supplied via an inlet device 8 gas and / or air.
In dem Gehäuse 3 des Setzgeräts 1 ist ein Treibkolben 10 in den Figuren 1 , 2 und 4 hin und her bewegbar nach unten und nach oben geführt. Der Treibkolben 10 umfasst eine Kolbenstange 1 1 , die von einem Kolbenkopf 12 ausgeht. Ein dem Kolbenkopf 12 abgewandtes Setzende 14 der Kolbenstange 1 1 ist in einer (nicht dargestellten) Bolzenführung angeordnet, die zum Führen von Befestigungselementen dient, die auch als Bolzen bezeichnet werden. In Figur 4 ist das Setzende 14 der Kolbenstange 1 1 des Treibkolbens 10 abgeschnitten dargestellt. In the housing 3 of the setting device 1, a driving piston 10 in the figures 1, 2 and 4 is moved back and forth guided downwards and upwards. The driving piston 10 comprises a piston rod 1 1, which starts from a piston head 12. A facing away from the piston head 12 setting end 14 of the piston rod 1 1 is arranged in a (not shown) bolt guide, which serves to guide fasteners, which are also referred to as bolts. In Figure 4, the setting end 14 of the piston rod 1 1 of the driving piston 10 is shown cut off.
Die Bolzenführung mit der darin angeordneten Kolbenstange 1 1 des Treibkolbens 10 wird auch als Setzwerk bezeichnet. Über das Setzwerk kann ein Befestigungselement, wie ein Nagel, Bolzen oder dergleichen, in einen (nicht dargestellten) Untergrund eingetrieben werden. Vor dem Setzen eines Befestigungselements wird das Setzgerät 1 mit seiner Bolzenführung an den Untergrund angepresst und ausgelöst. Zum Auslösen eines Setzvorgangs dient zum Beispiel ein (nicht dargestellter) Schalter, der auch als Triggerschalter bezeichnet wird. Der Schalter ist zum Beispiel an einem (ebenfalls nicht dargestellten) Handgriff des Setzgeräts 1 vorgesehen. The bolt guide with the piston rod 1 1 arranged therein of the driving piston 10 is also referred to as a network. About the network, a fastener, such as a nail, bolts or the like, are driven into a (not shown) underground. Before setting a fastener, the setting tool 1 is pressed with his pin guide to the ground and triggered. To trigger a setting process, for example, serves as a (not shown) switch, which also as Trigger switch is called. The switch is provided, for example, on a (also not shown) handle of the setting device 1.
Durch einen Pfeil 15 ist in den Figuren 1 , 2 und 4 eine Setzrichtung angedeutet. Beim Setzen eines Befestigungselements wird der Treibkolben 10 mit der Kolbenstange 1 1 in der Setzrichtung 15 stark beschleunigt, um das Befestigungselement in den Untergrund einzutreiben. Beim Setzvorgang wird der Treibkolben 10 aus seiner in den Figuren 1 und 2 dargestellten Ausgangsstellung, die einem oberen Totpunkt entspricht, in eine Endstellung bewegt, die einem unteren Totpunkt entspricht. By an arrow 15, a setting direction is indicated in Figures 1, 2 and 4. When setting a fastener of the driving piston 10 is greatly accelerated with the piston rod 1 1 in the setting direction 15 to drive the fastener into the ground. During the setting process, the driving piston 10 is moved from its initial position shown in FIGS. 1 and 2, which corresponds to a top dead center, into an end position which corresponds to a bottom dead center.
Eine Bewegung des Treibkolbens 10 in den Figuren 1 , 2 und 4 nach oben wird durch einen gehäusefesten Kolbenanschlag 16 begrenzt. Durch den Kolbenanschlag 16 wird der obere Totpunkt des Treibkolbens 10 definiert. Der Kolbenanschlag 16 kann mit einer Magneteinrichtung 17 kombiniert sein. Die Magneteinrichtung 17 dient zum Beispiel dazu, den Treibkolben 10 mit einer vorbestimmten Haltekraft in seiner in den Figuren 1 und 2 dargestellten Ausgangsstellung zu halten. Eine Bewegung des Treibkolbens 10 nach unten wird durch ein oder mehrere Anschlag- und/oder Dämpfungselemente 28, 29 begrenzt. Die Anschlag- und/oder Dämpfungselemente 28 sind zum Beispiel als Puffer ausgeführt. A movement of the drive piston 10 in Figures 1, 2 and 4 upwards is limited by a housing-fixed piston stop 16. By the piston stop 16, the top dead center of the driving piston 10 is defined. The piston stop 16 may be combined with a magnetic device 17. The magnetic device 17 serves, for example, to hold the driving piston 10 with a predetermined holding force in its starting position shown in FIGS. 1 and 2. Movement of the drive piston 10 downwards is limited by one or more stop and / or damping elements 28, 29. The stop and / or damping elements 28 are designed, for example, as a buffer.
Der Kolbenkopf 12 umfasst eine erste Kolbenfläche 21 , die der Hauptbrennkammer 6 zugewandt ist. Eine zweite Kolbenfläche 22, die der Hauptbrennkammer 6 abgewandt ist, begrenzt eine Vorkammer 25 in einem Vorkammerzylinder 24. Der Vorkammerzylinder 24 ist innerhalb des Gehäuses 3 des Setzgeräts 1 angeordnet. The piston head 12 comprises a first piston surface 21, which faces the main combustion chamber 6. A second piston surface 22, which faces away from the main combustion chamber 6, delimits an antechamber 25 in an antechamber cylinder 24. The prechamber cylinder 24 is arranged within the housing 3 of the setting device 1.
Die Vorkammer 25 stellt eine Vorbrennkammer dar, der eine Zündeinrichtung 26 und eine Einlasseinrichtung 27 zugeordnet sind. Darüber hinaus sind die Anschlag- und/oder Dämpfungselemente 28, 29 in der Vorkammer 25 angeordnet. Über die Einlasseinrichtung 27 wird der Vorkammer oder Vorbrennkammer 25 Luft oder ein Brenngas-Luft-Gemisch zugeführt, das mit Hilfe der Zündeinrichtung 26 in der Vorkammer 25 gezündet wird, wie in Figur 1 durch ein Symbol 60 angedeutet ist. The prechamber 25 represents a pre-combustion chamber to which an ignition device 26 and an inlet device 27 are assigned. In addition, the stop and / or damping elements 28, 29 are arranged in the antechamber 25. Via the inlet device 27 of the pre-chamber or pre-combustion chamber 25 air or a fuel gas-air mixture is supplied, which is ignited by means of the ignition device 26 in the prechamber 25, as indicated in Figure 1 by a symbol 60.
Der Vorkammerzylinder 24 umfasst zwei Durchtrittsöffnungen 31 , 32, die zum Beispiel den Austritt von Abgasen aus der Vorkammer 25 ermöglichen. Die Durchtrittsöffnungen 31 , 32 sind durch eine Steuereinrichtung 30 bedarfsabhängig verschließbar. Die Steuereinrichtung 30 umfasst eine Steuerhülse 34, die zwei Durchtrittsöffnungen 37, 38 aufweist. The pre-chamber cylinder 24 comprises two passage openings 31, 32, which allow, for example, the exit of exhaust gases from the pre-chamber 25. The passage openings 31, 32nd are closed by a control device 30 depending on demand. The control device 30 comprises a control sleeve 34, which has two passage openings 37, 38.
Wenn die Durchtrittsöffnungen 37, 38 der Steuerhülse 34 mit den Durchtrittsöffnungen 31 , 32 in Überdeckung gebracht werden, dann sind die Durchtrittsöffnungen 31 , 32, wie man in Figur 4 sieht, geöffnet. In den Figuren 1 und 2 sind die Durchtrittsöffnungen 31 , 32 durch die Steuerhülse 34 verschlossen. Die Steuerhülse 34 hat im Wesentlichen die Gestalt eines geraden Kreiszylindermantels und ist in den Figuren 1 ,2 und 4 nach unten und nach oben bewegbar. If the passage openings 37, 38 of the control sleeve 34 are brought into register with the passage openings 31, 32, then the passage openings 31, 32, as can be seen in FIG. 4, are opened. In FIGS. 1 and 2, the passage openings 31, 32 are closed by the control sleeve 34. The control sleeve 34 has substantially the shape of a straight circular cylinder jacket and is in Figures 1, 2 and 4 movable downwards and upwards.
Zwischen der Vorkammer 25 und der Hauptbrennkammer 6 sind zwei Überströmöffnungen 41 , 42 vorgesehen. Den Überströmöffnungen 41 , 42 ist jeweils eine Ventileinrichtung 43, 44 zugeordnet. Bei den Ventileinrichtungen 43, 44 handelt es sich zum Beispiel um Ventilklappen, die in den Figuren 1 und 2 geöffnet sind, um einen Durchtritt des gezündeten Luft-Brennstoff-Gemischs aus der Vorkammer 25 in die Hauptbrennkammer 6 zu ermöglichen. In Figur 4 sind die Ventileinrichtungen 43, 44 geschlossen. Die Steuereinrichtung 30 umfasst eine Steuerdruckfläche 45, die steuerdruckmäßig mit der Hauptbrennkammer 6 verbunden ist. Die Steuerdruckfläche 45 ist als Ringfläche 46 ausgeführt, die radial außerhalb des Vorkammerzylinders 24 der Hauptbrennkammer 6 zugewandt ist. Die Steuerdruckfläche 45 ist über ein Kopplungselement mechanisch mit der Steuerhülse 34 gekoppelt. Das Kopplungselement ist als Schieber 50 ausgeführt, der in den Figuren 1 , 2 und 4 nach unten und nach oben hin und her bewegbar an dem Vorkammerzylinder 24 geführt ist. An einem in den Figuren 1 , 2 und 4 oberen Ende 51 des Schiebers 50 ist die als Ringfläche 46 ausgeführte Steuerdruckfläche 45 vorgesehen. An einem in den Figuren 1 , 2 und 4 unteren Ende 52 des Schiebers 50 ist die Steuerhülse 34 befestigt. Die Steuereinrichtung 30 umfasst des Weiteren Federeinrichtungen 54, 55, die zum Beispiel als Schraubendruckfedern ausgeführt sind. Den in den Figuren 1 , 2 und 4 unteren Enden der Federeinrichtungen 54, 55 ist jeweils ein zylinderfester Anschlag 56, 57 zugeordnet. Die gehäusefesten Anschläge 56, 57 sind an den Vorkammerzylinder 24 vorgesehen. Die Federeinrichtungen 54, 55 sind zwischen den zylinderfesten Anschlägen 56, 57 und dem oberen Ende 51 des Schiebers 50 mit der Steuerdruckfläche 45 eingespannt. Somit ist der Schieber 50 über die Federeinrichtungen 54, 55 an den zylinderfesten Anschlägen 56, 57 abgestützt. In Figur 1 ist das Setzgerät 1 kurz nach der Zündung 60 in der Vorkammer 25 dargestellt. Das gezündete Gemisch gelangt über die geöffneten Ventileinrichtungen 43, 44 durch die Überströmöffnungen 41 , 42 in die Hauptbrennkammer 6. Die Durchtrittsöffnungen 31 , 32 der Vorkammer 25 sind durch die Steuerhülse 34 verschlossen. Between the prechamber 25 and the main combustion chamber 6, two overflow openings 41, 42 are provided. The overflow openings 41, 42 are each assigned a valve device 43, 44. The valve devices 43, 44 are, for example, valve flaps which are opened in FIGS. 1 and 2 in order to allow passage of the ignited air-fuel mixture from the prechamber 25 into the main combustion chamber 6. In Figure 4, the valve means 43, 44 are closed. The control device 30 comprises a control pressure surface 45, which is connected in terms of pressure with the main combustion chamber 6. The control pressure surface 45 is designed as an annular surface 46, which faces radially outside of the prechamber cylinder 24 of the main combustion chamber 6. The control pressure surface 45 is mechanically coupled to the control sleeve 34 via a coupling element. The coupling element is designed as a slide 50, which is guided in the figures 1, 2 and 4 down and up and forth to the antechamber cylinder 24 movable. At one in the figures 1, 2 and 4, the upper end 51 of the slider 50 which is designed as an annular surface 46 control pressure surface 45 is provided. At one in the figures 1, 2 and 4 lower end 52 of the slider 50, the control sleeve 34 is attached. The control device 30 further comprises spring devices 54, 55, which are designed, for example, as helical compression springs. The lower ends of the spring devices 54, 55 in FIGS. 1, 2 and 4 are each assigned a cylindrical stop 56, 57. The housing-fixed stops 56, 57 are provided on the prechamber cylinder 24. The spring devices 54, 55 are clamped between the cylinder-fixed stops 56, 57 and the upper end 51 of the slider 50 with the control pressure surface 45. Thus, the slider 50 is supported by the spring means 54, 55 on the cylinder-fixed stops 56, 57. In Figure 1, the setting tool 1 is shown shortly after the ignition 60 in the pre-chamber 25. The ignited mixture passes through the open valve means 43, 44 through the overflow openings 41, 42 in the main combustion chamber 6. The passage openings 31, 32 of the pre-chamber 25 are closed by the control sleeve 34.
In den Figuren 1 bis 3 befindet sich der Treibkolben 10 in seiner Ausgangslage oder Ausgangsstellung in einem hinteren Totpunkt. In dieser Ausgangslage oder Ausgangsstellung ist der Treibkolben 10 vollständig in das Gehäuse 3 eingefahren. In der Ausgangsstellung oder Ausgangslage schlägt der Kolbenkopf 12 des Treibkolbens 10 an dem zylinderfesten Kolbenanschlag 16 an. In the figures 1 to 3, the driving piston 10 is in its initial position or initial position in a rear dead center. In this initial position or starting position of the driving piston 10 is fully retracted into the housing 3. In the starting position or starting position, the piston head 12 of the drive piston 10 abuts against the cylinder-fixed piston stop 16.
Das in den Figuren 1 bis 4 dargestellte Setzgerät 1 ; 101 kann in verschiedenen Betriebsarten oder Funktionsmodi betrieben werden. In einem Hochenergiebetrieb wird ein Gasgemisch, insbesondere ein Brennstoff-Luft-Gemisch, sowohl in die Vorkammer 25 als auch in die Hauptbrennkammer 6 dosiert. Eine erste Zündung erfolgt durch die Zündeinrichtung 26 in der Vorkammer 25. The setting device 1 shown in Figures 1 to 4; 101 can be operated in various modes or modes of operation. In a high-energy operation, a gas mixture, in particular a fuel-air mixture, is metered into both the prechamber 25 and the main combustion chamber 6. A first ignition is carried out by the ignition device 26 in the pre-chamber 25th
In den Figuren 1 , 2 und 4 sind durch insgesamt vier Rechtecke 81 bis 84 eine Wähleinrichtung, eine Steuereinrichtung, eine Reseteinrichtung und eine Stelleinrichtung symbolisch angedeutet. Mit der Wähleinrichtung 81 kann zwischen den verschiedenen Betriebsarten des Setzgeräts 1 umgeschaltet werden. Die Steuereinrichtung 82 kann alternativ oder zusätzlich zu der Steuereinrichtung 30 vorgesehen sein. Die Steuereinrichtung 82 dient vorzugsweise ebenfalls zur Darstellung der verschiedenen Betriebsarten des Setzgeräts 1 . Die Reseteinrichtung 83 dient vorteilhaft dazu, gegebenenfalls eine Kolbenfehlstandsbeseitigung des Setzgeräts 1 einzuleiten. Die Stelleinrichtung 84 dient vorteilhaft dazu, einen Sollwert einer Druck-, Temperatur-, Weg- und/oder Zeitsteuerung manuell einzustellen beziehungsweise zu variieren. ln Figur 1 ist die Zündung in der Vorkammer 25 durch ein Symbol 60 angedeutet. Die Verbrennung breitet sich anschließend in Richtung Hauptbrennkammer 6 aus und entzündet diese durch die Ventileinrichtungen 43, 44, die als Rückströmventile ausgeführt sind. In FIGS. 1, 2 and 4, a selection device, a control device, a reset device and an adjusting device are indicated symbolically by a total of four rectangles 81 to 84. With the selector 81 can be switched between the different modes of the setting device 1. The control device 82 may be provided as an alternative or in addition to the control device 30. The control device 82 preferably also serves to display the various operating modes of the setting device 1. The reset device 83 advantageously serves to initiate a piston fault removal of the setting device 1 if necessary. The adjusting device 84 is advantageously used to manually set or vary a desired value of a pressure, temperature, displacement and / or time control. In FIG. 1, the ignition in the antechamber 25 is indicated by a symbol 60. The combustion then spreads in the direction of the main combustion chamber 6 and ignites them by the valve means 43, 44, which are designed as Rückströmventile.
In Figur 2 ist dargestellt, dass in einem Schwachenergiebetrieb des Setzgeräts 1 eine Einspritzung und Zündung nur in der Hauptbrennkammer 6 erfolgt. Die Zündung in der Hauptbrennkammer 6 erfolgt durch die weitere Zündeinrichtung 76, wie durch ein Symbol 90 angedeutet ist. FIG. 2 shows that in a low-energy operation of the setting device 1, injection and ignition take place only in the main combustion chamber 6. The ignition in the main combustion chamber 6 is carried out by the further ignition device 76, as indicated by a symbol 90.
Im Schwachenergiebetrieb ist es möglich, die Federvorspannung der Federeinrichtungen 54, 55 zu verstellen, insbesondere zu verringern. Durch die Verringerung der Federvorspannung kann auf einfache Art und Weise verhindert werden, dass der Treibkolben 10 im Schwachenergiebetrieb auf ein Gaspolster läuft. Die Verstellung der Federvorspannung kann zum Beispiel über ein Schraubgewinde zwischen den gehäusefesten Anschlägen 56, 57 und dem Vorkammerzylinder 24 dargestellt werden. In low power operation, it is possible to adjust the spring bias of the spring devices 54, 55, in particular to reduce. By reducing the spring preload can be prevented in a simple manner that the driving piston 10 runs in low energy operation on a gas cushion. The adjustment of the spring preload can be represented, for example, by means of a screw thread between the stops fixed to the housing 56, 57 and the antechamber cylinder 24.
In Figur 3 ist ein Setzgerät 101 mit einer Steuereinrichtung 105 dargestellt, welche die Steuereinrichtungen 30, 82 in den Figuren 1 , 2 und 4 ersetzt. Das Setzgerät 101 umfasst des Weiteren eine Sensoreinrichtung 106, die der Vorkammer 25 zugeordnet ist. Darüber hinaus umfasst das Setzgerät 101 eine Sensoreinrichtung 107, die der Hauptbrennkammer 6 zugeordnet ist. FIG. 3 shows a setting device 101 with a control device 105 which replaces the control devices 30, 82 in FIGS. 1, 2 and 4. The setting device 101 further comprises a sensor device 106 which is associated with the pre-chamber 25. In addition, the setting device 101 comprises a sensor device 107 which is associated with the main combustion chamber 6.
Die Steuereinrichtung 105 ist über eine Steuerleitung 1 1 1 mit der weiteren Zündeinrichtung 76 verbunden. Des Weiteren ist die Steuereinrichtung 105 über eine Steuerleitung 1 12 mit der Sensoreinrichtung 106 verbunden. Darüber hinaus ist die Steuereinrichtung 105 über eine Steuerleitung 1 13 mit der Sensoreinrichtung 107 verbunden. The control device 105 is connected via a control line 1 1 1 with the further ignition device 76. Furthermore, the control device 105 is connected to the sensor device 106 via a control line 1 12. In addition, the control device 105 is connected via a control line 1 13 with the sensor device 107.
Bei den Sensoreinrichtungen 106, 107 handelt es sich um Weg-, Zeit-, Druck- oder Temperatursensoren. Bei der Steuereinrichtung 105 handelt es sich vorzugsweise um eine elektronische Steuerung. Ab einem vorgegebenen Sollwert, der über die Steuereinrichtung 105 abgeglichen wird, erfolgt die Zündung in der Hauptbrennkammer 6 mittels der darin befindlichen Zündeinrichtung 76, die zum Beispiel als Zündkerze ausgeführt ist. Der Sollwert kann entweder durch einen Benutzer eingestellt oder automatisch, zum Beispiel über das Auswerten einer vorherigen Setzung, eingestellt werden. Im Betrieb des Setzgeräts 101 wird zunächst durch die Vorkammerverbrennung ein definierter Vordruck in der Hauptbrennkammer 6 aufgebaut. Dann wird die Zündeinrichtung 76 über die Steuereinrichtung 105 zu dem definierten Zeitpunkt gezündet. Bei einer druckgesteuerten Zündung wird der Druck über die Sensoreinrichtung 106 in der Vorkammer 25 und/oder über die Sensoreinrichtung 107 in der Hauptbrennkammer 6 gemessen. Dann wird die Hauptbrennkammer 6 ab einem gewissen Druckniveau gezündet. The sensor devices 106, 107 are travel, time, pressure or temperature sensors. The control device 105 is preferably an electronic controller. From a predetermined desired value, which is adjusted via the control device 105, the ignition takes place in the main combustion chamber 6 by means of the ignition device 76 therein, which is designed for example as a spark plug. The set point can either be set by a user or set automatically, for example by evaluating a previous setting. During operation of the setting device 101, a defined admission pressure in the main combustion chamber 6 is initially established by the prechamber combustion. Then, the ignition device 76 is ignited via the control device 105 at the defined time. In the case of a pressure-controlled ignition, the pressure is measured via the sensor device 106 in the prechamber 25 and / or via the sensor device 107 in the main combustion chamber 6. Then the main combustion chamber 6 is ignited from a certain pressure level.
In Figur 4 ist das Setzgerät 1 aus den Figuren 1 und 2 mit einem Kolbenfehlstand dargestellt. Der Treibkolben ist an seinem dem Kolbenkopf 12 abgewandten Ende abgeschnitten dargestellt. Der Kolbenkopf 12 des Treibkolbens 10 ist etwas unterhalb der gehäusefesten Anschläge 56, 57 angeordnet. Mit Hilfe der weiteren Zündeinrichtung 76 der Hauptbrennkammer 6 kann der Kolbenfehlstand gemäß unterschiedlichen Varianten beseitigt werden. FIG. 4 shows the setting device 1 from FIGS. 1 and 2 with a piston malfunction. The drive piston is shown cut off at its end facing away from the piston head 12. The piston head 12 of the drive piston 10 is arranged slightly below the housing-fixed stops 56, 57. With the help of the further ignition device 76 of the main combustion chamber 6, the piston malfunction can be eliminated according to different variants.
Gemäß einer ersten Variante wird der Treibkolben 10 nach einem zusätzlichen Zündzyklus in der Hauptbrennkammer 6 in seine Ursprungslage oder Ausgangslage zurückgebracht. Hierbei wird die Ventileinrichtung 75 zur Entlüftung der Hauptbrennkammer 6 genutzt. Durch ein Symbol 120 ist eine Zweitzündung in der Hauptbrennkammer 6 angedeutet, die durch die weitere Zündeinrichtung 76 initiiert wird. According to a first variant, the driving piston 10 is returned to its original position or initial position after an additional ignition cycle in the main combustion chamber 6. In this case, the valve device 75 is used for venting the main combustion chamber 6. By a symbol 120, a secondary ignition in the main combustion chamber 6 is indicated, which is initiated by the further ignition device 76.
Durch Pfeile 121 , 122 ist angedeutet, dass ein Druckausgleich zwischen der Hauptbrennkammer 6 und der Umgebung über die geöffnete Ventileinrichtung 75 durchgeführt wird. Ein abschließendes Abkühlen der Verbrennungsgase in der Hauptbrennkammer 6 führt bei geschlossener Ventileinrichtung 75 durch die damit verbundene Unterdruckbildung in der Hauptbrennkammer 6 dazu, dass der Treibkolben 10 in Figur 4 nach oben zurück in seine Ausgangslage gezogen wird. Im Normalbetrieb ist die Ventileinrichtung 75 geschlossen. Die Kolbenfehlstandsbeseitigung wird zum Beispiel durch Betätigung der Reseteinrichtung 83 ausgelöst. Bei einer Betätigung der Reseteinrichtung 83 wird die zusätzliche Zündung oder Zweitzündung 120 der Hauptbrennkammer 6 eingeleitet. Bei einem zu starken Restgasanteil in der Hauptbrennkammer 6 wird vorteilhaft die Ventileinrichtung 75 der Hauptbrennkammer 6 geöffnet, um eine Spülung der Hauptbrennkammer 6 zu ermöglichen. Wenn eine normale Gerätespülung aufgrund eines Kolbenfehlstands nicht funktioniert, ist es möglich, durch das Öffnen der Ventileinrichtung 75 die Hauptbrennkammer 6 zu spülen und Frischluft zuzuführen. Danach kann die Hauptbrennkammer 6 nach erfolgter Brennstoffzudosierung über die zusätzliche Zündeinrichtung 76 gezündet werden. Eine dadurch bewirkte Setzung ist dann eine Setzung im Schwachenergiebetrieb. Nach der Setzung im Schwachenergiebetrieb wird der Treibkolben wieder thermisch zurückgestellt, so dass das Setzgerät 1 anschließend wieder im Hochenergiebetrieb verwendet werden kann. By arrows 121, 122 it is indicated that a pressure equalization between the main combustion chamber 6 and the environment via the open valve device 75 is performed. A final cooling of the combustion gases in the main combustion chamber 6 results in closed valve device 75 by the associated negative pressure formation in the main combustion chamber 6 that the driving piston 10 is pulled in Figure 4 upwards to its original position. In normal operation, the valve device 75 is closed. The piston misfire removal is triggered, for example, by operation of the reset device 83. Upon actuation of the reset device 83, the additional ignition or secondary ignition 120 of the main combustion chamber 6 is initiated. If the proportion of residual gas in the main combustion chamber 6 is too high, the valve device 75 of the main combustion chamber 6 is advantageously opened in order to allow purging of the main combustion chamber 6. If a normal equipment purging does not work due to a piston malfunction, it is possible to flush the main combustion chamber 6 and supply fresh air by opening the valve means 75. Thereafter, the main combustion chamber 6 can be ignited after the fuel metering via the additional ignition device 76. A resulting settlement is then a settlement in the low energy operation. After settling in low-energy operation, the driving piston is again reset thermally, so that the setting device 1 can then be used again in high-energy operation.

Claims

PATENTANSPRUECHE cLAIMS
1 . Brennkraftbetriebenes Setzgerät (1 ; 101 ) zum Eintreiben von Befestigungselementen in einen Untergrund, mit mindestens einer Hauptbrennkammer (6) für einen Brennstoff, mit einem Treibkolben (10), der in einer Ausgangslage vollständig eingefahren ist und über expandierbare Gase aus der Hauptbrennkammer (6) in Setzrichtung (15) antreibbar ist, und mit einer Vorkammer (25), der eine Zündeinrichtung (26) zugeordnet ist und in der vor der Zündung eines Brennstoff-Luft-Gemischs in der Hauptbrennkammer (6) ein auf die Hauptbrennkammer (6) wirkender Druck aufbaubar ist, wobei der1 . Internal combustion setting device (1, 101) for driving fastening elements into a substrate, having at least one main combustion chamber (6) for a fuel, with a driving piston (10) which is completely retracted in a starting position and via expandable gases from the main combustion chamber (6) in the setting direction (15) is drivable, and with an antechamber (25), which is associated with an ignition device (26) and in the before the ignition of a fuel-air mixture in the main combustion chamber (6) acting on the main combustion chamber (6) Pressure is buildable, whereby the
Hauptbrennkammer (6) eine weitere Zündeinrichtung (76) zugeordnet ist, dadurch gekennzeichnet, dass das Setzgerät (1 ; 101 ) eine Wähleinrichtung (81 ) umfasst, über die zwischen einem Schwachenergiebetrieb mit einer Zündung in der Hauptbrennkammer (6) und einem Hochenergiebetrieb mit einer Zündung in der Vorkammer (25) gewählt werden kann. Main combustion chamber (6) is associated with a further ignition device (76), characterized in that the setting device (1, 101) comprises a selection device (81), which switches between a low-energy operation with an ignition in the main combustion chamber (6) and a high-energy operation with a Ignition in the prechamber (25) can be selected.
2. Brennkraftbetriebenes Setzgerät nach Anspruch 1 , dadurch gekennzeichnet, dass das Setzgerät (1 ; 101 ) eine Steuereinrichtung (30;82;105) umfasst, die mit mindestens einer Sensoreinrichtung (106) zur Druck-, Temperatur- und/oder Wegerfassung in/nahe bei der Vorkammer (25) und/oder mit mindestens einer Sensoreinrichtung (107) in/nahe bei der Hauptbrennkammer (6) verbunden ist. 2. Combustion-operated setting tool according to claim 1, characterized in that the setting device (1; 101) comprises a control device (30; 82; 105), which is provided with at least one sensor device (106) for pressure, temperature and / or path detection in / near the pre-chamber (25) and / or connected to at least one sensor device (107) in / near the main combustion chamber (6).
3. Brennkraftbetriebenes Setzgerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Setzgerät (1 ) eine Reseteinrichtung (83) umfasst, die steuerungsmäßig mit der Zündeinrichtung (76;26) der Hauptbrennkammer (6)/Vorkammer (25) verbunden ist, um bei einem Kolbenfehlstand durch eine Zündung in der Hauptbrennkammer (6)/Vorkammer (25) ein Rücksteilen des Treibkolbens (10) in seine Ausgangslage zu bewirken. 3. Combustion-operated setting tool according to one of the preceding claims, characterized in that the setting device (1) comprises a reset device (83) which is in control with the ignition device (76; 26) of the main combustion chamber (6) / pre-chamber (25) is connected to at a piston malfunction by ignition in the main combustion chamber (6) / pre-chamber (25) to cause a back splitting of the driving piston (10) in its initial position.
4. Brennkraftbetriebenes Setzgerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Setzgerät (1 ) eine Stelleinrichtung (84) umfasst, mit der ein Sollwert einer Druck-, Temperatur-, Weg- und/oder Zeitsteuerung manuell eingestellt beziehungsweise variiert werden kann. 4. Combustion-operated setting tool according to one of the preceding claims, characterized in that the setting device (1) comprises an adjusting device (84), with which a desired value of a pressure, temperature, displacement and / or timing can be manually adjusted or varied.
5. Brennkraftbetriebenes Setzgerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Setzgerät (1 ) zusätzlich zu dem Schwachenergiebetrieb und dem Hochenergiebetrieb mindestens eine weitere Betriebsart aufweist, in welcher ein Kolbenfehlstand erkannt und/oder beseitigt wird. 5. Combustion-operated setting tool according to one of the preceding claims, characterized in that the setting tool (1) in addition to the low-energy operation and the high-energy operation has at least one further mode in which a piston malfunction is detected and / or eliminated.
6. Brennkraftbetriebenes Setzgerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Setzgerät (1 ) zusätzlich zu dem Schwachenergiebetrieb und dem Hochenergiebetrieb mindestens eine weitere Betriebsart aufweist, in welcher zunächst ein Gasgemisch durch die Zündeinrichtung (26) der Vorkammer (25) gezündet wird, wonach das Gasgemisch in der Hauptbrennkammer (6) zeit-, druck-, weg- und/oder temperaturgesteuert durch die weitere Zündeinrichtung (76) gezündet wird. 6. Combustion-operated setting tool according to one of the preceding claims, characterized in that the setting device (1) in addition to the low-energy operation and high-energy operation has at least one further mode in which initially a gas mixture by the ignition device (26) of the prechamber (25) is ignited , according to which the gas mixture in the main combustion chamber (6) is time, pressure, path and / or temperature controlled by the further ignition device (76) is ignited.
7. Brennkraftbetriebenes Setzgerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Hauptbrennkammer (6) eine Entlüftungsventileinrichtung (76) zugeordnet ist, die bei einem Kolbenfehlstand während einer Zweitzündung in der Hauptbrennkammer (6) einen Druckausgleich mit der Umgebung ermöglicht. 7. Combustion-operated setting tool according to one of the preceding claims, characterized in that the main combustion chamber (6) is associated with a vent valve means (76) which allows for a piston malfunction during a secondary ignition in the main combustion chamber (6) pressure equalization with the environment.
8. Verfahren zum Betreiben eines brennkraftbetriebenen Setzgeräts (1 ; 101 ) nach einem der vorhergehenden Ansprüche. 8. A method of operating a combustion-powered setting device (1; 101) according to one of the preceding claims.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass ein Kolbenfehlstand, insbesondere durch eine Kolbenwegerfassung, automatisch erkannt und eine Zündung in der Vorkammer (25) oder in der Hauptbrennkammer (6) eingeleitet wird, um den Treibkolben (10) in seine Ausgangslage zurückzustellen. 9. The method according to claim 8, characterized in that a piston malfunction, in particular by a Kolbenwegerfassung, automatically detected and an ignition in the pre-chamber (25) or in the main combustion chamber (6) is introduced to return the drive piston (10) to its original position ,
10. Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass die Hauptbrennkammer (6) bei einem Kolbenfehlstand gespült wird, wonach der Treibkolben (10) mit einer Zündung in der Hauptbrennkammer (6) durch eine Setzung im Schwachenergiebetrieb in seine Ausgangslage zurückgestellt wird. 10. The method according to claim 8 or 9, characterized in that the main combustion chamber (6) is purged in a piston malfunction, after which the driving piston (10) is reset with an ignition in the main combustion chamber (6) by a settlement in low energy operation in its initial position.
EP16812759.5A 2015-12-22 2016-12-20 Combustion-driven setting tool and method for operating such a setting tool Active EP3393711B1 (en)

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EP15201888.3A EP3184251A1 (en) 2015-12-22 2015-12-22 Combustion-driven setting tool and method for operating such a setting tool
PCT/EP2016/081852 WO2017108745A1 (en) 2015-12-22 2016-12-20 Combustion-powered placing tool and method for operating such a placing tool

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CN108472798B (en) 2021-08-27
CN108472798A (en) 2018-08-31
WO2017108745A1 (en) 2017-06-29
TWI628056B (en) 2018-07-01
JP2018538154A (en) 2018-12-27
US20180370005A1 (en) 2018-12-27
EP3393711B1 (en) 2019-11-06
TW201722646A (en) 2017-07-01
EP3184251A1 (en) 2017-06-28
US10898996B2 (en) 2021-01-26

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