EP2181809A1 - Appareil de scellement fonctionnant avec des combustibles - Google Patents

Appareil de scellement fonctionnant avec des combustibles Download PDF

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Publication number
EP2181809A1
EP2181809A1 EP09171918A EP09171918A EP2181809A1 EP 2181809 A1 EP2181809 A1 EP 2181809A1 EP 09171918 A EP09171918 A EP 09171918A EP 09171918 A EP09171918 A EP 09171918A EP 2181809 A1 EP2181809 A1 EP 2181809A1
Authority
EP
European Patent Office
Prior art keywords
fuel
combustion chamber
resistance element
setting tool
ignition device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09171918A
Other languages
German (de)
English (en)
Inventor
Norbert Heeb
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 EP2181809A1 publication Critical patent/EP2181809A1/fr
Withdrawn legal-status Critical Current

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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

Definitions

  • the present invention relates to a combustion-powered setting tool, the type mentioned in the preamble of claim 1.
  • Such setting devices have a combustion chamber in which a portion of liquefied petroleum gas or another vaporizable fuel with an oxidizing agent such. B. ambient air, is combustible.
  • a setting piston displaceably guided in a piston guide is driven in order to drive a fastening element into an article.
  • a combustion-powered setting tool which has control electronics for controlling the ignition and the fuel injection.
  • the setting tool has a z. B. formed as a conventional spark plug igniter on.
  • a disadvantage of this solution is that on the one hand the electronics for generating the high voltage is expensive and expensive to manufacture and on the other hand a strong electromagnetic radiation (EMC) is generated, which influence the control electronics and errors or malfunctions in the electrical system of the setting tool can lead.
  • EMC electromagnetic radiation
  • Processors, E-PROMS and / or memory can be set in undefined states. There is also the danger that the memories could be overwritten or deleted.
  • a common cause of failure in such combustion-powered setting tools is a short circuit between electrodes of the spark plug. The short circuit can be done by a conductive dirt layer, which is built up, inter alia, by moisture from the combustion residues. Further, oil added to the fuel gas as a lubricant may accumulate on the electrodes and form a bridge preventing generation of a spark.
  • the object of the present invention is to provide a combustion-powered setting tool of the aforementioned type which avoids the disadvantages, which is insensitive to contamination, which ignites reliably and which can be produced inexpensively.
  • the ignition device has a resistance element.
  • the resistance element is z. B. formed as a resistance wire or resistor track and is after triggering the setting device, z. B. via a trigger switch, energized by an electronic control system, whereby it heats up and ignites the air-fuel gas mixture contained in the combustion chamber within about 10 - 100 ms after triggering.
  • the temperature of the resistance element reaches at least approximately 500 ° C.
  • EMC electrical disturbances
  • the resistance element is designed as a helical wire, whereby a large contact surface between the hot filament and the gas mixture to be ignited is available.
  • the relatively long wire can be accommodated in a relatively small space.
  • the resistance element contains at least one metal of the group Cu, Ni, Wo, Cr, Mn, C, Si.
  • the resistance element consists of an alloy of one or more of these metals.
  • the resistance element has an electrical resistance of 0.5 to 10 ohms / mm [exp2].
  • the ignition current for the ignition device generated by a control unit is between 0.1 and 50 amperes.
  • the hand-held, combustion-powered setting tool 10 has a one-piece or multi-part housing, generally designated 11, in which a drive 12 operable by means of an air-fuel mixture is arranged.
  • a fastener such as a nail, bolts, etc. are driven into a workpiece.
  • the fasteners may, for. B. be stored in a magazine on setting tool 10.
  • the drive includes u. a. a combustion chamber 15 and a guide cylinder 13, in which a setting piston 14 is arranged axially displaceable.
  • the combustion chamber 15 is in the illustrated initial state circumferentially by a combustion chamber sleeve 28, and axially at a first end of the setting piston 14 and an annular combustion chamber wall 29 and at a second end of a combustion chamber rear wall 30 which is formed as a cylinder head limited.
  • An arranged in the combustion chamber 15 and driven by a motor 17 fan 16 serves both to generate a turbulent flow regime of a located in the closed combustion chamber 15 air-fuel mixture and the rinsing of the open combustion chamber 15 with fresh air after the setting process.
  • the motor 17 is mounted on the combustion chamber rear wall 30, which acts as a closure for the axially displaceable combustion chamber sleeve 28.
  • a trigger switch 19 is arranged, via which an arranged in the combustion chamber 15 ignition device 26 mediated via an electronic control unit 25 is triggered when the setting tool 10 pressed against a workpiece while a switching means 24 in the mouth region 27 of the setting device 10th is activated.
  • the ignition device 26 is electrically connected to the control electronics 25 via a line 41.
  • the ignition device 26 has a designed as a helical wire resistance element 36 which is disposed between a first electrode 31 and a second electrode 32 of the ignition device 26 and for igniting an air-fuel mixture in the combustion chamber via a supplied by the control electronics 25 Zündstrom is heated.
  • the resistance element 36 has an electrical resistance of 0.5 to 10 ohms / mm [exp2] and includes a metal of the group Cu, Ni, Where, Cr, Mn, C, Si.
  • the electrodes 31, 32 are embedded in an insulator body 33 as a carrier element.
  • the setting tool 10 can be operated with a fuel gas or with a vaporizable liquid fuel, the / in a fuel reservoir 20, such as. B. a fuel can, is provided.
  • the fuel reservoir 20 is connected via a fuel line 22 to a fuel inlet 23 in the combustion chamber 15.
  • a metering device 21 such. B. a metering valve, interposed, via which a control of the fuel supply to the combustion chamber 15 takes place.
  • an electrical energy source 40 such. As an accumulator, available.
  • the ignition device 26 and the metering device 21 are controlled electronically via the control electronics designated overall by 25.
  • the control electronics 25 has z. B. one or more microprocessors for data processing and control of the various electrical device functions and is connected via an electrical supply line 44 to the electrical energy source 40.
  • a generated by the control electronics 25 ignition current for the ignition device 26 is preferably between 0.1 and 50 amps.
EP09171918A 2008-10-28 2009-10-01 Appareil de scellement fonctionnant avec des combustibles Withdrawn EP2181809A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008043228A DE102008043228A1 (de) 2008-10-28 2008-10-28 Brennkraftbetriebenes Setzgerät

Publications (1)

Publication Number Publication Date
EP2181809A1 true EP2181809A1 (fr) 2010-05-05

Family

ID=41692900

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09171918A Withdrawn EP2181809A1 (fr) 2008-10-28 2009-10-01 Appareil de scellement fonctionnant avec des combustibles

Country Status (6)

Country Link
US (1) US20100102103A1 (fr)
EP (1) EP2181809A1 (fr)
JP (1) JP2010105152A (fr)
CN (1) CN101722503A (fr)
DE (1) DE102008043228A1 (fr)
TW (1) TW201031501A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009041828A1 (de) * 2009-09-18 2011-03-24 Hilti Aktiengesellschaft Vorrichtung zur Übertragung von Energie auf ein Befestigungselement
DE102009041824A1 (de) * 2009-09-18 2011-03-24 Hilti Aktiengesellschaft Vorrichtung zur Übertragung von Energie auf ein Befestigungselement
DE102011077832A1 (de) * 2011-06-20 2012-12-20 Hilti Aktiengesellschaft Treibmittelbehälter für brennkraftbetriebene Bolzensetzgeräte
EP2826601A1 (fr) * 2013-07-16 2015-01-21 HILTI Aktiengesellschaft Procédé de commande et machine-outil manuelle
CN105157060A (zh) * 2014-05-30 2015-12-16 胡晋青 一种透平燃烧室
CN111021778A (zh) * 2019-11-30 2020-04-17 江苏中润信息工程科技开发有限公司 适用于安防的破墙设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3514025A (en) * 1967-10-30 1970-05-26 Omark Industries Inc Powder actuated tool
GB2072811A (en) * 1980-03-31 1981-10-07 Hilti Ag Trigger electrode for a caseless propellant charged-actuated tool
US6123241A (en) 1995-05-23 2000-09-26 Applied Tool Development Corporation Internal combustion powered tool

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861371A (en) * 1973-12-10 1975-01-21 Joseph Gamell Ind Inc Ignition system for engine
DE3005342A1 (de) * 1980-02-13 1981-08-20 Hilti AG, 9494 Schaan Pulverkraftbetriebenes bolzen-setzgeraet
JPS56129581U (fr) * 1980-03-03 1981-10-01
US4477717A (en) * 1983-04-08 1984-10-16 Wellman Thermal Systems Corporation Fast start glow plug
DE3825012A1 (de) * 1988-07-22 1990-01-25 Beru Werk Ruprecht Gmbh Co A Werkstoff fuer ein elektrisches widerstandselement mit positivem temperaturkoeffizienten
DE4010479A1 (de) * 1990-03-31 1991-10-02 Bosch Gmbh Robert Gluehstiftkerze fuer brennkraftmaschinen
DE4301252A1 (de) * 1993-01-19 1994-07-21 Beru Werk Ruprecht Gmbh Co A Stabflammglühkerze
DE19630402C2 (de) * 1996-07-26 2000-12-28 Beru Ag Stabflammglühkerze
JP2002098333A (ja) * 2000-09-26 2002-04-05 Ngk Spark Plug Co Ltd グロープラグ
DE102005015569A1 (de) * 2005-04-05 2006-10-12 Robert Bosch Gmbh Keramisches Widerstands- oder Sensorelement
US20080307794A1 (en) * 2007-06-15 2008-12-18 Robert Kurt Graupner Guanidine based fuel system and method of operating a combustion system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3514025A (en) * 1967-10-30 1970-05-26 Omark Industries Inc Powder actuated tool
GB2072811A (en) * 1980-03-31 1981-10-07 Hilti Ag Trigger electrode for a caseless propellant charged-actuated tool
US6123241A (en) 1995-05-23 2000-09-26 Applied Tool Development Corporation Internal combustion powered tool

Also Published As

Publication number Publication date
US20100102103A1 (en) 2010-04-29
JP2010105152A (ja) 2010-05-13
TW201031501A (en) 2010-09-01
DE102008043228A1 (de) 2010-04-29
CN101722503A (zh) 2010-06-09

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