EP0223740A2 - Powder-actuated nail-setting tool - Google Patents

Powder-actuated nail-setting tool Download PDF

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Publication number
EP0223740A2
EP0223740A2 EP86810504A EP86810504A EP0223740A2 EP 0223740 A2 EP0223740 A2 EP 0223740A2 EP 86810504 A EP86810504 A EP 86810504A EP 86810504 A EP86810504 A EP 86810504A EP 0223740 A2 EP0223740 A2 EP 0223740A2
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EP
European Patent Office
Prior art keywords
piston
guide
channel
bolt
piston guide
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
EP86810504A
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German (de)
French (fr)
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EP0223740A3 (en
EP0223740B1 (en
Inventor
Peter Jochum
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Hilti AG
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Hilti AG
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Publication date
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Publication of EP0223740A2 publication Critical patent/EP0223740A2/en
Publication of EP0223740A3 publication Critical patent/EP0223740A3/en
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Publication of EP0223740B1 publication Critical patent/EP0223740B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/14—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil

Definitions

  • the invention relates to a powder-powered setting tool with a piston guide, within which a driving piston can be driven from a rear starting position into a front end position by means of propellant gases of a propellant charge, the piston guide at the rear end a receptacle for the propellant charge and in the rear and in the front area through a channel with one another has connected openings, the channel being formed between the piston guide and a housing surrounding the latter, and the rear opening being closed in its rear starting position with respect to the receptacle for the propellant charges from the driving piston.
  • the invention has for its object to provide a powder-operated bolt-actuating device, the driving piston of which is reliably brought into the ignition-ready starting position by the exhaust gases.
  • the object is achieved in that a closure slide is provided for closing the channel.
  • the closure slide closes the channel.
  • the zone of the channel in front of the closure point and the front area of the guide bore thus form a storage space which is closed to the atmosphere.
  • the exhaust gases compressed therein are fully available for returning the driving piston to the ignition-ready initial position.
  • the locking slide is preferably designed as a sleeve which can be displaced relative to the piston guide.
  • the bushing is a rotationally symmetrical part that is easy to produce and is particularly suitable for a channel in the form of an annular gap surrounding the piston guide.
  • the rifle protrudes telescopically slidably into the annular gap between the piston guide and the housing. Wall parts of the sleeve and housing or piston guide work together as locking points that can be contacted.
  • the locking slide is advantageously arranged on a bolt guide that is displaceable relative to the piston guide and can be supported on the base.
  • the sliding movements of the bolt guide are also used to control the locking slide.
  • the bolt guide projects over the housing for safety reasons.
  • the slide valve keeps the channel closed.
  • the device is pressed against a surface with the pin guide, causing the pin guide and thus the locking slide to move backwards relative to the piston guide. This opens the channel by the slide valve.
  • the driving-in process of the bolt causes recoil forces, which move the piston guide together with the housing towards the rear relative to the locking slide and the bolt guide.
  • the channel is closed again by the locking slide and the aforementioned closed storage space is created.
  • the exhaust gases compressed in the storage space return the driving piston to the ignition-ready initial position.
  • the locking slide and the pin guide are held in the rest position, for example by spring force.
  • the closing slide has a closing lamella for closing a vent opening from the channel into the atmosphere.
  • the closing lamella keeps the ventilation opening closed, so that no exhaust gases can escape into the atmosphere via the open channel. In this way, a maximum of the exhaust gases is used for the complete return of the driving piston.
  • the ventilation opening is released from the locking lamella. The gases present in the piston guide when the drive piston is returned can now escape via the ventilation opening via the rear opening of the piston guide and the zone of the channel connected to it, and thus form no obstruction to the return process.
  • the setting tool shown in FIG. 1 has a housing designated overall by 1, which consists of an outer shell 2 with a laterally protruding handle 3, a support tube 4 projecting beyond the shell 2 and a muzzle-side guide tube 5.
  • a trigger 6 for triggering the setting process is arranged on handle 3.
  • a propellant charge magazine which is denoted overall by 7 and protrudes from the housing 1 and is composed of a carrier strip 8 and propellant charges 9 sitting thereon.
  • a tubular bolt guide 11 which is displaceable relative to the housing 1, projects above the guide tube 5.
  • the bolt guide 11 is integrally connected to the rear by a locking slide designed as a bushing 12.
  • the bushing 12 is mounted on the front side in the guide tube 5 and on the rear side in the support tube 4 in a sealing and displaceable manner.
  • the bushing 12 has longitudinal slots 13 on the front side and openings 14 on the rear side.
  • a piston guide, designated overall by 15, projects into the bushing 12 from the rear. This sits immovably in the support tube 4 of the housing 1.
  • the driving piston 18 consists of a rear-side head 19, which is sealingly mounted in the guide bore 17, and a shaft 21 with a smaller circular cross-section adjoining this to the front.
  • the shaft 21 passes through a stop ring 22 for the driving piston 18, which is supported on the rear in the pin guide 11 and slidably protrudes into the opening 23 of the pin guide 11 for sealing and guiding purposes.
  • a bolt 24 to be inserted is inserted into the mouth bore 23.
  • the device with the mouth at the fastening point is pressed against a base 25.
  • the bolt guide 11 has come together from the projecting position shown in FIG. 1 moved with the sleeve 12 in the rear position of FIG. 2.
  • the drive piston 18 is also in its ignitable rear starting position.
  • a channel 26 which is essentially in the form of an annular gap between the piston guide 15 and the support tube 4 of the housing 1, is connected via the longitudinal slots 13 to front openings 27 of the piston guide 15 and via the openings 14 to the rear openings 28 of the piston guide 15.
  • the head 19 of the driving piston 18 separates the rear opening 28 from the receptacle 16.
  • An annular closure lamella 29 sealingly covers a vent opening 31 opening into the atmosphere.
  • the setting process is triggered by igniting the propellant charge 9.
  • 16 highly compressed propellant gases are formed in the receptacle, which accelerate the propellant piston 18 to the front under the action of the rear end face of the head 19.
  • the head 19 releases the rear openings 28 in the piston guide 15.
  • exhaust gases flow from the receptacle 16 via the openings 28 into the channel 26 and from here via the front openings 27 in front of the head 19 into the guide bore 17, as is illustrated by a flow arrow in FIG. 3.
  • reaction forces which act as a recoil on the parts connected to the housing 1 so as to be displaceable during the driving-in process lead to a displacement of the housing 1 and the piston guide 15 towards the rear relative to the pin guide 11 and the bush 12 towards the end of the driving-in process.
  • an enlarged zone 32 of the sleeve 12 telescopically comes into contact with an inside sealing bead 33 of the support tube 4 of the housing 1. Since the sleeve 12 is also in sealing contact with the bolt guide 11, the front zone of the Channel 26 and the guide bore 17 of the pin guide 11 created a closed storage space, as can be seen in FIG. 4.
  • the compressed exhaust gases present here bring about a reliable return of the driving piston 18 into its ignition-ready initial position.
  • the remaining gases located behind the head 19 in the piston guide 15 can escape through the rear openings 28, the adjacent rear zone of the channel 26 and the ventilation opening 31, as indicated by a flow arrow, since the closure plate 29 when the housing 1 is moved due to the recoil has released the vent 31.

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

Abstract

Das pulverkraftbetriebene Bolzensetzgerät verfügt über einen Treibkolben (18), der mit Hilfe der Abgase in die zündbereite Ausgangsstellung zurückgeführt wird. Hierzu ist ein Kanal (26) vorgesehen, der mit einer hinteren Oeffnung (28) und einer vorderen Oeffnung (27) in der Kolbenführung (15) in Verbindung steht. Dadurch können die Abgase aus der Aufnahme (16) für die Treibladungen (9) in den vorderen Bereich der Kolbenführung (15) übergeleitet werden. Mittels eines Verschlussschiebers (12) ist für das Rückführen des Treibkolbens (18) der Kanal (26) verschliessbar. Die in dem auf diese Weise geschaffenen Speicherraum vorhandenen komprimierten Abgase sind so an einem Entweichen gehindert und gewährleisten folgedessen eine zuverlässige Rückführung des Treibkolbens (18).The powder-actuated bolt-setting tool has a drive piston (18) which is returned to the starting position ready for ignition with the aid of the exhaust gases. For this purpose, a channel (26) is provided, which is connected to a rear opening (28) and a front opening (27) in the piston guide (15). As a result, the exhaust gases can be transferred from the receptacle (16) for the propellant charges (9) to the front area of the piston guide (15). The channel (26) can be closed by means of a closing slide (12) for the return of the driving piston (18). The compressed exhaust gases present in the storage space created in this way are prevented from escaping and consequently ensure reliable return of the driving piston (18).

Description

Die Erfindung betrifft ein pulverkraftbetriebenes Setzgerät mit einer Kolbenführung, innerhalb welcher ein Treibkolben mittels Treibgasen einer Treibladung von einer hinteren Aus­gangsstellung in eine vordere Endstellung treibbar ist, die Kolbenführung am hinteren Ende eine Aufnahme für die Treib­ladung sowie im hinteren und im vorderen Bereich durch einen Kanal miteinander verbundene Oeffnungen aufweist, wobei der Kanal zwischen der Kolbenführung und einem diese umgebenden Gehäuse gebildet ist, und die hintere Oeffnung gegenüber der Aufnahme für die Treibladungen vom Treibkolben in seiner hin­teren Ausgangsstellung verschlossen ist.The invention relates to a powder-powered setting tool with a piston guide, within which a driving piston can be driven from a rear starting position into a front end position by means of propellant gases of a propellant charge, the piston guide at the rear end a receptacle for the propellant charge and in the rear and in the front area through a channel with one another has connected openings, the channel being formed between the piston guide and a housing surrounding the latter, and the rear opening being closed in its rear starting position with respect to the receptacle for the propellant charges from the driving piston.

Bei bekannten pulverkraftbetriebenen Bolzensetzgeräten ist es üblich, nach erfolgtem Eintreibhub eines die Bolzen be­aufschlagenden Treibkolbens diesen durch mechanischen Kraft­angriff aus der vorderen Endstellung in die zündbereite hin­tere Ausgangsstellung zurückzuführen. Dieser Rückführvorgang verursacht eine umstandliche und zeitaufwendige Handhabung der Geräte.In known powder-operated bolt-setting devices, it is customary, after a driving-in stroke of a driving piston acting on the bolts has been carried out, to return the latter from the front end position into the ignition-ready rear starting position by mechanical force application. This return process causes cumbersome and time-consuming handling of the devices.

Um diesem Nachteil zu begegnen, ist ein pulverkraftbetrie­benes Bolzensetzgerät bekannt (US-PS 3 744 240), das die Rückführung des Treibkolbens durch die Abgase der Treibla­dungen bewerkstelligt. Hier zeigt sich allerdings, dass die zum Rückführen des Treibkolbens nutzbare Energie zu einer vollständigen Rückführung vielfach nicht ausreicht. Die Ur_ sache hierfür liegt in den Abgasverlusten, die durch einen längs der Kolbenführung sich erstreckenden Kanal auftreten, der vorder- und hinterseitig über Oeffnungen zum einen mit dem vorderen Bereich der Führungsbohrung der Kolbenführung und zum anderen hinterseitig mit einer Aufnahme für die Treibladungen in Verbindung steht.In order to counter this disadvantage, a powder-actuated bolt-actuating device is known (US Pat. No. 3,744,240) which effects the return of the driving piston through the exhaust gases from the propellant charges. Here, however, it is shown that the energy usable for returning the driving piston is often not sufficient for complete return. The reason for this lies in the exhaust gas losses that occur through a channel extending along the piston guide, which is connected on the front and rear through openings on the one hand to the front area of the guide bore of the piston guide and on the other hand to a receptacle for the propellant charges .

Der Erfindung liegt die Aufgabe zugrunde, ein pulverkraftbe­triebenes Bolzensetzgerät zu schaffen, dessen Treibkolben von den Abgasen zuverlässig in zündbereite Ausgangsstellung ge­bracht wird.The invention has for its object to provide a powder-operated bolt-actuating device, the driving piston of which is reliably brought into the ignition-ready starting position by the exhaust gases.

Erfindungsgemäss wird die Aufgabe dadurch gelöst, dass zum Verschliessen des Kanals ein Verschlussschieber vorgesehen ist.According to the invention, the object is achieved in that a closure slide is provided for closing the channel.

Nach dem Ueberströmen der Abgase während des Eintreibhubs des Treibkolbens von der als Zündkammer dienenden Aufnahme in den vorderen Bereich der Führungsbohrung verschliesst der Verschlussschieber den Kanal. Die vor der Verschlussstelle liegende Zone des Kanals und der vordere Bereich der Füh­rungsbohrung bilden so einen gegenüber der Atmosphäre ge­schlossenen Speicherraum. Die darin komprimierten Abgase stehen vollends für das Rückführen des Treibkolbens in die zündbereite Ausgangsstellung zur Verfügung.After the exhaust gases overflow during the driving stroke of the driving piston from the receptacle serving as the ignition chamber into the front region of the guide bore, the closure slide closes the channel. The zone of the channel in front of the closure point and the front area of the guide bore thus form a storage space which is closed to the atmosphere. The exhaust gases compressed therein are fully available for returning the driving piston to the ignition-ready initial position.

Vorzugsweise ist der Verschlussschieber als relativ zur Kol­benführung verschiebbare Büchse ausgebildet. Die Büchse ist ein einfach herstellbares rotationssymmetrisches Teil, das sich insbesondere für einen Kanal in Form eines die Kolbenführung umlaufenden Ringspaltes eignet. Die Büchse ragt so teleskopisch verschiebbar in den Ringspalt zwischen der Kolbenführung und dem Gehäuse ein. Wandungsteile von Büchse und Gehäuse oder Kolbenführung wirken als miteinander kontaktierbare Verschluss­stellen zusammen.The locking slide is preferably designed as a sleeve which can be displaced relative to the piston guide. The bushing is a rotationally symmetrical part that is easy to produce and is particularly suitable for a channel in the form of an annular gap surrounding the piston guide. The rifle protrudes telescopically slidably into the annular gap between the piston guide and the housing. Wall parts of the sleeve and housing or piston guide work together as locking points that can be contacted.

Mit Vorteil ist der Verschlussschieber an einer relativ zur Kolbenführung verschiebbaren, am Untergrund abstützbaren Bol­zenführung angeordnet. Die Verschiebebewegungen der Bolzenfüh­rung werden so auch zur Steuerung des Verschlussschiebers ge­nutzt. In Ruhestellung des Gerätes überragt die Bolzenführung aus Sicherheitsgründen das Gehäuse nach vorne. In dieser vor­deren Stellung hält der Verschlussschieber den Kanal verschlos­sen. Für den Setzvorgang wird das Gerät mit der Bolzenführung gegen einen Untergrund gedrückt, wodurch sich die Bolzenführung und damit auch der Verschlussschieber gegenüber der Kolbenfüh­rung nach hinten verschieben. Der Kanal wird dadurch vom Ver­schlussschieber geöffnet.The locking slide is advantageously arranged on a bolt guide that is displaceable relative to the piston guide and can be supported on the base. The sliding movements of the bolt guide are also used to control the locking slide. When the device is at rest, the bolt guide projects over the housing for safety reasons. In this forward position, the slide valve keeps the channel closed. For the setting process, the device is pressed against a surface with the pin guide, causing the pin guide and thus the locking slide to move backwards relative to the piston guide. This opens the channel by the slide valve.

Anschliessendes Zünden der Treibladung bewirkt den Eintreib­hub des Treibkolbens. Nach erfolgter Beschleunigung des Treib­kolbens treten diesen hinterseitig beaufschlagende Treibgase als Abgase über die hintere Oeffnung in der Kolbenführung, den Kanal und die vordere Oeffnung in der Kolbenführung nach vorne in die Führungsbohrung der Kolbenführung ein.Subsequent ignition of the propellant charge causes the propelling piston to be driven in. After the driving piston has accelerated, these driving gases acting on the rear enter as exhaust gases via the rear opening in the piston guide, the channel and the front opening in the piston guide forward into the guide bore of the piston guide.

Der Eintreibvorgang des Bolzens bewirkt Rückstosskräfte, wel­che die Kolbenführung zusammen mit dem Gehäuse gegenüber dem Verschlussschieber und der Bolzenführung nach hinten verschie­ben. Dadurch wird der Kanal vom Verschlussschieber wieder ver­schlossen und der voran erwähnte geschlossene Speicherraum ge­schaffen. Die im Speicherraum komprimierten Abgase bringen den Treibkolben in die zündbereite Ausgangsstellung zurück. Nach dem Abheben des Gerätes vom Untergrund werden der Ver­schlussschieber und die Bolzenführung, beispielsweise durch Federkraft, in Ruhestellung gehalten.The driving-in process of the bolt causes recoil forces, which move the piston guide together with the housing towards the rear relative to the locking slide and the bolt guide. As a result, the channel is closed again by the locking slide and the aforementioned closed storage space is created. The exhaust gases compressed in the storage space return the driving piston to the ignition-ready initial position. After the device has been lifted off the surface, the locking slide and the pin guide are held in the rest position, for example by spring force.

Nach einem weiteren Vorschlag der Erfindung weist der Ver­schlussschieber eine Verschlusslamelle zum Verschliessen einer vom Kanal in die Atmosphäre mündenden Entlüftungsöffnung auf. Während des Eintreibhubes hält die Verschlusslamelle die Entlüftungsöffnung geschlossen, so dass keine Abgase über den offenen Kanal in die Atmosphäre entweichen können. Dieserart wird also ein Maximum der Abgase zur vollständigen Rückführung des Treibkolbens genutzt. Nach dem Umsteuern des Verschluss­schiebers in die den Kanal verschliessende Stellung ist die Entlüftungsöffnung von der Verschlusslamelle freigegeben. Die beim Rückführen des Treibkolbens hinter diesem in der Kolben­führung vorhandenen Gase können nun über die hintere Oeffnung der Kolbenführung und die mit dieser verbundene Zone des Kanals über die Entlüftungsöffnung entweichen und bilden so keine Behinderung für den Rückführvorgang.According to a further proposal of the invention, the closing slide has a closing lamella for closing a vent opening from the channel into the atmosphere. During the driving-in stroke, the closing lamella keeps the ventilation opening closed, so that no exhaust gases can escape into the atmosphere via the open channel. In this way, a maximum of the exhaust gases is used for the complete return of the driving piston. After the locking slide has been reversed into the position closing the channel, the ventilation opening is released from the locking lamella. The gases present in the piston guide when the drive piston is returned can now escape via the ventilation opening via the rear opening of the piston guide and the zone of the channel connected to it, and thus form no obstruction to the return process.

Die Erfindung wird nachstehend anhand von Zeichnungen, die ein Ausführungsbeispiel wiedergeben, näher erläutert. Es zeigen:

  • Fig. 1 Ein Bolzensetzgerät in Ruhestellung, in An­sicht;
  • Fig. 2 den Vorderbereich des Setzgerätes nach Fig. 1 in Zündbereitschaftsstellung, in vergrös­sertem Längsschnitt;
  • Fig. 3 den Vorderbereich des Setzgerätes nach Fig. 1 beim Eintreibvorgang, in vergrössertem Längs­schnitt;
  • Fig. 4 den Vorderbereich des Setzgerätes nach Fig. 1 während des Rückhubs des Treibkolbens, in ver­grössertem Längsschnitt.
The invention is explained in more detail below with reference to drawings which show an exemplary embodiment. Show it:
  • Fig. 1 A bolt gun in the rest position, in view;
  • FIG. 2 shows the front region of the setting tool according to FIG. 1 in the ignition-ready position, in an enlarged longitudinal section;
  • 3 shows the front region of the setting tool according to FIG. 1 during the driving-in process, in an enlarged longitudinal section;
  • Fig. 4 shows the front area of the setting tool according to Fig. 1 during the return stroke of the driving piston, in an enlarged longitudinal section.

Das in Fig. 1 dargestellte Setzgerät weist ein insgesamt mit 1 bezeichnetes Gehäuse auf, das aus einer äusseren Schale 2 mit seitlich abragendem Handgriff 3, einem die Schale 2 nach vorne überragenden Stützrohr 4 und einem mündungsseitigen Füh­rungsrohr 5 besteht. An Handgriff 3 ist ein Trigger 6 zum Aus­lösen des Setzvorganges angeordnet. Oberseitig ragt aus dem Gehäuse 1 ein schrittweise in das Geräteinnere transportier­bares, insgesamt mit 7 bezeichnetes Treibladungsmagazin, das sich aus einem Trägerstreifen 8 und darauf sitzenden Treibla­dungen 9 zusammensetzt. In Ruhestellung überragt eine gegenüber dem Gehäuse 1 verschiebbare rohrförmige Bolzenführung 11 das Führungsrohr 5.The setting tool shown in FIG. 1 has a housing designated overall by 1, which consists of an outer shell 2 with a laterally protruding handle 3, a support tube 4 projecting beyond the shell 2 and a muzzle-side guide tube 5. A trigger 6 for triggering the setting process is arranged on handle 3. On the upper side, a propellant charge magazine, which is denoted overall by 7 and protrudes from the housing 1 and is composed of a carrier strip 8 and propellant charges 9 sitting thereon. In the rest position, a tubular bolt guide 11, which is displaceable relative to the housing 1, projects above the guide tube 5.

Wie der Fig. 2 zu entnehmen ist, schliesst sich an die Bol­zenführung 11 nach hinten einstückig ein als Büchse 12 aus­gebildeter Verschlussschieber an. Vorderseitig ist die Büchse 12 im Führungsrohr 5 und hinterseitig im Stützrohr 4 dichtend und verschiebbar gelagert. Die Büchse 12 verfügt vorderseitig über Längsschlitze 13 und hinterseitig über Durchbrüche 14. In die Büchse 12 ragt von hinten eine insgesamt mit 15 be­zeichnete Kolbenführung ein. Diese sitzt unverschiebbar im Stützrohr 4 des Gehäuses 1. An eine nach hinten offene Auf­nahme 16 für die Treibladungen 9 schliesst nach vorne eine zentrale Führungsbohrung 17 für einen insgesamt mit 18 be­zeichneten Treibkolben an. Der Treibkolben 18 besteht aus einem hinterseitigen, in der Führungsbohrung 17 dichtend gelagerten Kopf 19 und einem an diesen nach vorne anschlies­senden Schaft 21 mit kleinerem Kreisquerschnitt. Der Schaft 21 durchsetzt einen in der Bolzenführung 11 hinterseitig ab­gestützten Stoppring 22 für den Treibkolben 18 und ragt zum Dichtungs- und Führungszwecke verschiebbar in die Mündungs­bohrung 23 der Bolzenführung 11 ein. In die Mündungsbohrung 23 ist ein zu setzender Bolzen 24 eingeführt.As can be seen in FIG. 2, the bolt guide 11 is integrally connected to the rear by a locking slide designed as a bushing 12. The bushing 12 is mounted on the front side in the guide tube 5 and on the rear side in the support tube 4 in a sealing and displaceable manner. The bushing 12 has longitudinal slots 13 on the front side and openings 14 on the rear side. A piston guide, designated overall by 15, projects into the bushing 12 from the rear. This sits immovably in the support tube 4 of the housing 1. A central guide bore 17 for a propulsion piston, designated overall by 18, adjoins a receptacle 16 which is open at the rear for the propellant charges 9. The driving piston 18 consists of a rear-side head 19, which is sealingly mounted in the guide bore 17, and a shaft 21 with a smaller circular cross-section adjoining this to the front. The shaft 21 passes through a stop ring 22 for the driving piston 18, which is supported on the rear in the pin guide 11 and slidably protrudes into the opening 23 of the pin guide 11 for sealing and guiding purposes. A bolt 24 to be inserted is inserted into the mouth bore 23.

In der in Fig. 2 gezeigten Zündbereitschaftsstellung ist das Gerät mit der Mündung an der Befestigungsstelle gegen einen Untergrund 25 gedrückt. Dabei hat sich die Bolzenführung 11 aus der in Fig. 1 gezeigten vorstehenden Position zusammen mit der Büchse 12 in die der Fig. 2 entnehmbare hintere Stel­lung verschoben. Auch der Treibkolben 18 befindet sich in seiner zündbereiten hinteren Ausgangsstellung.In the ignition readiness position shown in FIG. 2, the device with the mouth at the fastening point is pressed against a base 25. The bolt guide 11 has come together from the projecting position shown in FIG. 1 moved with the sleeve 12 in the rear position of FIG. 2. The drive piston 18 is also in its ignitable rear starting position.

In der Zündbereitschaftsstellung steht ein im wesentlichen als Ringspalt zwischen der Kolbenführung 15 und dem Stütz­rohr 4 des Gehäuses 1 ausgebildeter Kanal 26 über die Längs­schlitze 13 mit vorderseitigen Oeffnungen 27 der Kolbenfüh­rung 15 und über die Durchbrüche 14 mit hinterseitigen Oeff­nungen 28 der Kolbenführung 15 in Verbindung. Der Kopf 19 des Treibkolbens 18 trennt die hintere Oeffnung 28 von der Aufnahme 16. Eine ringförmige Verschlusslamelle 29 deckt eine in die Atmosphäre mündende Entlüftungsöffnung 31 dich­tend ab.In the ignition-ready position, a channel 26, which is essentially in the form of an annular gap between the piston guide 15 and the support tube 4 of the housing 1, is connected via the longitudinal slots 13 to front openings 27 of the piston guide 15 and via the openings 14 to the rear openings 28 of the piston guide 15. The head 19 of the driving piston 18 separates the rear opening 28 from the receptacle 16. An annular closure lamella 29 sealingly covers a vent opening 31 opening into the atmosphere.

Durch Zünden der Treibladung 9 wird der Setzvorgang ausge­löst. Dabei bilden sich in der Aufnahme 16 hochkomprimierte Treibgase, die unter Einwirkung auf die hintere Stirnseite des Kopfes 19 den Treibkolben 18 nach vorne beschleunigen. Nach Zurücklegen einer relativ kurzen Beschleunigungsstrecke gibt der Kopf 19 die hinteren Oeffnungen 28 in der Kolben­führung 15 frei. Dadurch strömen Abgase von der Aufnahme 16 über die Oeffnungen 28 in den Kanal 26 und von hier über die vorderen Oeffnungen 27 vor den Kopf 19 in die Führungsboh­rung 17, wie dies ein Strömungspfeil in der Fig. 3 verdeut­licht.The setting process is triggered by igniting the propellant charge 9. In this case, 16 highly compressed propellant gases are formed in the receptacle, which accelerate the propellant piston 18 to the front under the action of the rear end face of the head 19. After covering a relatively short acceleration distance, the head 19 releases the rear openings 28 in the piston guide 15. As a result, exhaust gases flow from the receptacle 16 via the openings 28 into the channel 26 and from here via the front openings 27 in front of the head 19 into the guide bore 17, as is illustrated by a flow arrow in FIG. 3.

Die beim Eintreibvorgang als Rückstoss an den mit dem Gehäuse 1 verschiebefest verbundenen Teilen wirksamen Reaktionskräfte führen gegen Ende des Eintreibvorganges zu einem Verschieben des Gehäuses 1 und der Kolbenführung 15 gegenüber der Bolzen­führung 11 und der Büchse 12 nach hinten. Dabei tritt eine er­weiterte Zone 32 der Büchse 12 teleskopisch in Kontakt mit einem innenseitigen Dichtwulst 33 des Stützrohres 4 des Ge­häuses 1. Da die Büchse 12 auch in dichtendem Kontakt mit der Bolzenführung 11 steht, wird so durch die vordere Zone des Kanals 26 und die Führungsbohrung 17 der Bolzenführung 11 ein geschlossener Speicherraum geschaffen, wie dies der Fig. 4 entnehmbar ist. Die hierin vorhandenen komprimierten Abgase bewerkstelligen eine zuverlässige Rückführung des Treibkol­bens 18 in dessen zündbereite Ausgangsstellung. Die restli­chen hinter dem Kopf 19 in der Kolbenführung 15 befindlichen Gase können währenddessen über die hinteren Oeffnungen 28, die angrenzende hintere Zone des Kanals 26 und die Entlüf­tungsöffnung 31 - wie durch einen Strömungspfeil angedeutet -­entweichen, da die Verschlusslamelle 29 beim rückstossbe­dingten Verschieben des Gehäuses 1 die Entlüftungsöffnung 31 freigegeben hat.The reaction forces which act as a recoil on the parts connected to the housing 1 so as to be displaceable during the driving-in process lead to a displacement of the housing 1 and the piston guide 15 towards the rear relative to the pin guide 11 and the bush 12 towards the end of the driving-in process. Here, an enlarged zone 32 of the sleeve 12 telescopically comes into contact with an inside sealing bead 33 of the support tube 4 of the housing 1. Since the sleeve 12 is also in sealing contact with the bolt guide 11, the front zone of the Channel 26 and the guide bore 17 of the pin guide 11 created a closed storage space, as can be seen in FIG. 4. The compressed exhaust gases present here bring about a reliable return of the driving piston 18 into its ignition-ready initial position. The remaining gases located behind the head 19 in the piston guide 15 can escape through the rear openings 28, the adjacent rear zone of the channel 26 and the ventilation opening 31, as indicated by a flow arrow, since the closure plate 29 when the housing 1 is moved due to the recoil has released the vent 31.

Nach dem anschliessenden Abheben des Setzgerätes vom Unter­grund 25 ist wieder die der Fig. 1 entnehmbare Ruhestellung gegeben, wobei für den nächsten Setzvorgang in an sich be­kannter Weise eine neue Kartusche 9 der Aufnahme 16 zuge­führt wird.After the subsequent lifting of the setting tool from the base 25, the rest position shown in FIG. 1 is again given, a new cartridge 9 being fed to the receptacle 16 in a manner known per se for the next setting process.

Claims (4)

1. Pulverkraftbetriebenes Bolzensetzgerät mit einer Kol­benführung, innerhalb welcher ein Treibkolben mittels Treibgasen einer Treibladung von einer hinteren Aus­gangsstellung in eine vordere Endstellung treibbar ist, die Kolbenführung am hinteren Ende eine Aufnahme für die Treibladung sowie im hinteren und im vorderen Bereich durch einen Kanal miteinander verbundene Oeffnungen aufweist, wobei der Kanal zwischen der Kolbenführung und einem diese umgebenden Gehäuse gebildet ist, und die hintere Oeffnung gegenüber der Aufnahme für die Treibladungen vom Treibkolben in seiner hinteren Aus­gangsstellung verschlossen ist, dadurch ge­kennzeichnet, dass zum Verschliessen des Kanals (26) ein Verschlussschieber (12) vorgesehen ist.1. Powder-operated bolt-actuating device with a piston guide, within which a driving piston can be driven from a rear starting position into a front end position by means of propellant gases of a propellant charge, the piston guide at the rear end a receptacle for the propellant charge and openings connected to one another in the rear and in the front area by a channel The channel is formed between the piston guide and a housing surrounding it, and the rear opening is closed in its rear starting position in relation to the receptacle for the propellant charges by the propulsion piston, characterized in that a closure slide (12) for closing the channel (26) ) is provided. 2. Bolzensetzgerät nach Anspruch 1, dadurch gekennzeichnet, dass der Verschlussschieber als relativ zur Kolbenfüh­rung (15) verschiebbare Büchse (12) ausgebildet ist.2. Bolt setting device according to claim 1, characterized in that the locking slide is designed as a sleeve (12) which can be displaced relative to the piston guide (15). 3. Bolzensetzgerät nach Anspruch 1 oder 2, dadurch gekenn­zeichnet, dass der Verschlussschieber (12) an einer relativ zur Kolbenführung (15) verschiebbaren, am Un­tergrund (25) abstützbaren Bolzenführung (11) angeordnet ist.3. Bolt-setting device according to claim 1 or 2, characterized in that the locking slide (12) is arranged on a bolt guide (11) which can be displaced relative to the piston guide (15) and can be supported on the base (25). 4. Bolzensetzgerät nach einem der Ansprüche 1 bis 3, da­durch gekennzeichnet, dass der Verschlussschieber (12) eine Verschlusslamelle (29) zum Verschliessen einer vom Kanal (26) in die Atmosphäre mündenden Entlüftungsöffnung (31) aufweist.4. Bolt-setting tool according to one of claims 1 to 3, characterized in that the closure slide (12) has a closure lamella (29) for closing a vent opening (31) opening into the atmosphere from the channel (26).
EP86810504A 1985-11-19 1986-11-04 Powder-actuated nail-setting tool Expired - Lifetime EP0223740B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853540953 DE3540953A1 (en) 1985-11-19 1985-11-19 POWDER POWERED BOLT SETTING DEVICE
DE3540953 1985-11-19

Publications (3)

Publication Number Publication Date
EP0223740A2 true EP0223740A2 (en) 1987-05-27
EP0223740A3 EP0223740A3 (en) 1988-06-08
EP0223740B1 EP0223740B1 (en) 1990-08-08

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ID=6286351

Family Applications (1)

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EP86810504A Expired - Lifetime EP0223740B1 (en) 1985-11-19 1986-11-04 Powder-actuated nail-setting tool

Country Status (4)

Country Link
US (1) US4711385A (en)
EP (1) EP0223740B1 (en)
JP (1) JPH0626797B2 (en)
DE (2) DE3540953A1 (en)

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EP0621110A1 (en) * 1993-04-17 1994-10-26 HILTI Aktiengesellschaft Powder-actuated driving tool
EP0638395A1 (en) * 1993-04-24 1995-02-15 HILTI Aktiengesellschaft Powder-actuated fastening tool
EP0780195A1 (en) * 1995-12-21 1997-06-25 HILTI Aktiengesellschaft Powder driven fastener tool with a non-return valve for returning the driver piston
EP0798084A1 (en) * 1996-03-26 1997-10-01 Societe De Prospection Et D'inventions Techniques Spit Fastener driving tool with automatic return of plunger to firing position
DE19617672C1 (en) * 1996-05-03 1997-10-09 Beto Tornado Gmbh Powder-operated stud setting tool
DE19617671C1 (en) * 1996-05-03 1997-10-09 Beto Tornado Gmbh Powder-operated stud setting tool
US6824035B1 (en) 1998-01-19 2004-11-30 Agodzinski Marek Power operated piston tool with piston automatic return

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DE4122873A1 (en) * 1991-07-11 1993-01-14 Hilti Ag POWDER-POWERED SETTING UNIT WITH MAGAZINE FOR FASTENING ELEMENTS
US5657919A (en) * 1991-09-03 1997-08-19 Masterset Inc. Modular fastener driving tool with noise reducing structure
DE4433410A1 (en) * 1994-09-20 1996-03-21 Hilti Ag Bolt setting tool
DE19544105A1 (en) * 1995-11-27 1997-05-28 Hilti Ag Bolt setting tool with shock absorber
US6092710A (en) * 1998-06-09 2000-07-25 Berner Gmbh Explosive powder charge operated bolt-setting tool
US6059162A (en) * 1998-10-16 2000-05-09 Illinois Tool Works Inc. Exhaust baffle and spring assisted reset and dampener for powder actuated tool
DE19950349B4 (en) * 1999-10-19 2006-07-27 Hilti Ag Setting tool for fastening elements
DE10105886C2 (en) * 2001-02-09 2002-12-05 Hilti Ag piston holder
US6695192B1 (en) * 2002-09-30 2004-02-24 Illinois Tool Works Inc. Adjustable depth control for fastener driving tool
US7287679B2 (en) * 2004-07-28 2007-10-30 Powers Products Iii, Llc Powder activated setting tool piston retainer arrangement and method
TWM362088U (en) * 2009-04-09 2009-08-01 Cheng-Ho Lee Gunpowder nail-hitting apparatus capable of adjusting nail-hitting force
JP5826581B2 (en) * 2010-10-18 2015-12-02 日本工機株式会社 Gas pressure device, crushing method using gas pressure device, and protective cover for gas pressure device
FR2993810B1 (en) * 2012-07-25 2014-07-11 Illinois Tool Works INDIRECT SHOOTING FIXING TOOL, WITH ANTI-SHRINKING RELIEF HOLDER
US10926389B2 (en) * 2018-07-31 2021-02-23 Chung-Heng Lee Powder-actuated tool

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Publication number Priority date Publication date Assignee Title
EP0621110A1 (en) * 1993-04-17 1994-10-26 HILTI Aktiengesellschaft Powder-actuated driving tool
EP0638395A1 (en) * 1993-04-24 1995-02-15 HILTI Aktiengesellschaft Powder-actuated fastening tool
EP0780195A1 (en) * 1995-12-21 1997-06-25 HILTI Aktiengesellschaft Powder driven fastener tool with a non-return valve for returning the driver piston
CN1061584C (en) * 1995-12-21 2001-02-07 希尔蒂股份公司 Nailing tool operated by power
US5767434A (en) * 1995-12-21 1998-06-16 Hilti Aktiengesellschaft Explosive powder charge operated setting tool
EP0798084A1 (en) * 1996-03-26 1997-10-01 Societe De Prospection Et D'inventions Techniques Spit Fastener driving tool with automatic return of plunger to firing position
FR2746690A1 (en) * 1996-03-26 1997-10-03 Spit Soc Prospect Inv Techn AUTOMATICALLY AUTOMATIC RETRACTABLE PADDING DRIVE APPARATUS IN THE POSITION OF THE SHOOTING
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EP0805003A2 (en) * 1996-05-03 1997-11-05 Beto-Tornado GmbH Powder-actuated bolt driving tool
EP0805002A3 (en) * 1996-05-03 1998-01-14 Beto-Tornado GmbH Powder-actuated bolt driving tool
EP0805003A3 (en) * 1996-05-03 1998-02-04 Beto-Tornado GmbH Powder-actuated bolt driving tool
DE19617671C1 (en) * 1996-05-03 1997-10-09 Beto Tornado Gmbh Powder-operated stud setting tool
US6085958A (en) * 1996-05-03 2000-07-11 Berner Gmbh Explosive powder charge operated bolt-setting tool
US6123242A (en) * 1996-05-03 2000-09-26 Berner Gmbh Explosive powder charge operated bolt-setting tool
DE19617672C1 (en) * 1996-05-03 1997-10-09 Beto Tornado Gmbh Powder-operated stud setting tool
US6824035B1 (en) 1998-01-19 2004-11-30 Agodzinski Marek Power operated piston tool with piston automatic return

Also Published As

Publication number Publication date
EP0223740A3 (en) 1988-06-08
EP0223740B1 (en) 1990-08-08
DE3540953A1 (en) 1987-05-21
JPH0626797B2 (en) 1994-04-13
DE3673341D1 (en) 1990-09-13
JPS62120985A (en) 1987-06-02
US4711385A (en) 1987-12-08

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