EP0346275A1 - Powder-actuated fastening tool - Google Patents

Powder-actuated fastening tool Download PDF

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Publication number
EP0346275A1
EP0346275A1 EP89810360A EP89810360A EP0346275A1 EP 0346275 A1 EP0346275 A1 EP 0346275A1 EP 89810360 A EP89810360 A EP 89810360A EP 89810360 A EP89810360 A EP 89810360A EP 0346275 A1 EP0346275 A1 EP 0346275A1
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EP
European Patent Office
Prior art keywords
piston
spring
driving
driving piston
brake
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Granted
Application number
EP89810360A
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German (de)
French (fr)
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EP0346275B1 (en
Inventor
Gerhard Ehmig
Peter Jochum
Erich Maurer
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Hilti AG
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Hilti AG
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Priority to AT89810360T priority Critical patent/ATE72160T1/en
Publication of EP0346275A1 publication Critical patent/EP0346275A1/en
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Publication of EP0346275B1 publication Critical patent/EP0346275B1/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 and a driving piston displaceable therein, a recess radially open to the driving piston with a brake ball and spring for the brake ball being provided in the piston guide.
  • the powder force is transmitted via a driving piston to a fastening element to be set.
  • the driving piston which is mounted in a piston guide, is pushed forward by the powder force from an ignition-ready position in the driving-in direction. After the setting process has been completed, the driving piston must be moved back to the ignition-ready position. Holding means ensure that the driving piston remains in the ignition-ready position until its holding force is exceeded by the powder force.
  • a setting tool which has a holding means in the form of a spring-loaded brake ball which is always pressed against a shaft of the driving piston.
  • the brake ball engages in an annular groove on the shaft.
  • a disadvantage of this known holding means is that the holding force also acts when the driving piston is pushed back into the ignition-ready position and consequently makes it difficult to push the driving piston back.
  • the invention has for its object to provide a setting tool, in which the pushing back of the driving piston in the ignition-ready position is possible without braking.
  • the axial extent of the recess suitably corresponds to 1.2 to 2 times the diameter of the brake ball. This design ensures that the respective functional position is achieved after a short movement of the driving piston and thus rapid control of the braking effect.
  • the spring advantageously has a spring force acting radially towards the driving piston and a supporting surface acting on the brake ball, which is inclined to the piston axis to form an acute angle that opens against the driving direction.
  • the support surface introduces the radial spring force of the spring into the brake ball in a component which acts counter to the driving-in direction and a component which acts radially towards the driving piston.
  • the acute angle is suitably between 3 ° and 9 °.
  • a spring which is expediently designed as a spring ring, the inner contour of which forms the support surface, has proven to be a simple and trouble-free solution. If there are two or more brake balls distributed over the circumference of the drive piston, a further advantage is that the spring ring simultaneously applies the same forces to all brake balls.
  • recesses 16 are provided diametrically opposite one another, radially inward and outward.
  • a brake ball 17 is mounted in each recess 16, the axial extent of the recesses 16 corresponding to 1.5 times the diameter of the brake balls 17.
  • the recesses 16 are narrowed inwards to prevent the brake balls 17 from falling through.
  • the brake balls 17 rest radially on the shaft 11 of the drive piston 8. They are supported on the outside on a spring 18 in the form of a spring ring.
  • the spring 18 has a circumferential support surface 18a formed by the inner contour.
  • the support surface 18a is inclined to form an acute angle a, which opens against the driving direction, with respect to the piston axis, as is illustrated in FIG. 2.
  • a cylindrical zone of the inner contour adjoins the support surface 18a to the front, ie in the driving-in direction.
  • the spring 18 is cut through a slot 18b to allow expansion and tensioning.
  • an annular groove 19 is provided in part 7, which passes through the recesses 16. The bottom of the annular groove 19 limits the radial deflection of the spring 18.
  • axial bores 21 are also provided, the mouth of which points forward and lies in the axial projection of the brake balls 17.
  • cylinder springs 22 are supported, which bring the brake balls 17 forward into contact with the support surface 18a.
  • the brake balls 17 migrate against the driving direction at the beginning of the displacement and run on the end 16b of the recess 16 facing away from the driving direction, as shown in FIG. 3.
  • the brake balls 17 come out of the clamping range of the spring 18 again, whereby the braking effect against the drive piston 8 is canceled.
  • the driving piston 8 can be brought into the ignition-ready position without braking effect.
  • the driving piston 8 If the driving piston 8 is in the ready-to-ignite position, there is the possibility that it shifts slightly in the driving-in direction before the powder propellant is ignited, for example after the setting tool has been placed hard on the ground. As a result of this displacement, the spring 18 is tensioned over the brake balls 17. Via the inclined support surface 18a, the spring tension causes the drive piston 8 to be immediately driven back by the brake balls 17 in the ready-to-fire position.

Abstract

The powder-actuated fastening tool possesses a piston guide (5) and a driving piston (8) displaceable therein. By means of braking balls (17) displaceably mounted in recesses (16) in the piston guide (5), the driving piston (8) is braked in the driving-in direction in that a spring (18) forces the braking balls (17) against the shaft (11) of the driving piston (8). On displacement of the driving piston (8) in the opposite direction to the driving-in direction, the braking balls (17) move in the recesses (16) out of the tension range of the spring (18), as a result of which the driving piston (8) is not subjected to any braking action. <IMAGE>

Description

Die Erfindung betrifft ein pulverkraftbetriebenes Setzgerät mit einer Kolbenführung und einem darin verschiebbaren Treib­kolben, wobei in der Kolbenführung eine zum Treibkolben hin radial offene Ausnehmung mit am Treibkolben anliegender Brems­kugel und Feder für die Bremskugel vorgesehen ist.The invention relates to a powder-powered setting tool with a piston guide and a driving piston displaceable therein, a recess radially open to the driving piston with a brake ball and spring for the brake ball being provided in the piston guide.

Bei bekannten pulverkraftbetriebenen Setzgeräten wird die Pulverkraft über einen Treibkolben auf ein zu setzendes Be­festigungselement übertragen. Der in einer Kolbenführung gelagerte Treibkolben wird dabei von der Pulverkraft aus einer Zündbereitschaftsstellung in Eintreibrichtung nach vorne verschoben. Nach erfolgtem Setzvorgang muss der Treib­kolben wieder in Zündbereitschaftsstellung zurückverschoben werden. Durch Haltemittel wird gewährleistet, dass der Treib­kolben die Zündbereitschaftsstellung beibehält, bis deren Haltekraft von der Pulverkraft überschritten wird.In known powder-operated setting tools, the powder force is transmitted via a driving piston to a fastening element to be set. The driving piston, which is mounted in a piston guide, is pushed forward by the powder force from an ignition-ready position in the driving-in direction. After the setting process has been completed, the driving piston must be moved back to the ignition-ready position. Holding means ensure that the driving piston remains in the ignition-ready position until its holding force is exceeded by the powder force.

Aus der DE-PS 1 058 950 ist ein Setzgerät bekannt, das ein Haltemittel in Form einer federbelasteten Bremskugel aufweist, die stets gegen einen Schaft des Treibkolbens ge­drückt wird. In Zündbereitschaftsstellung des Treibkolbens rastet die Bremskugel in eine Ringnut am Schaft ein.From DE-PS 1 058 950 a setting tool is known which has a holding means in the form of a spring-loaded brake ball which is always pressed against a shaft of the driving piston. When the driving piston is ready for ignition, the brake ball engages in an annular groove on the shaft.

Ein Nachteil dieses bekannten Haltemittels besteht darin, dass die Haltekraft auch beim Zurückschieben des Treibkol­bens in Zündbereitschaftsstellung wirkt und folglich das Zurückschieben des Treibkolbens erschwert.A disadvantage of this known holding means is that the holding force also acts when the driving piston is pushed back into the ignition-ready position and consequently makes it difficult to push the driving piston back.

Der Erfindung liegt die Aufgabe zugrunde, ein Setzgerät zu schaffen, bei dem das Zurückschieben des Treibkolbens in Zündbereitschaftsstellung ohne Bremswirkung möglich ist.The invention has for its object to provide a setting tool, in which the pushing back of the driving piston in the ignition-ready position is possible without braking.

Erfindungsgemäss wird die Aufgabe dadurch gelöst, dass in Bezug auf die Kolbenachse die Axialerstreckung der Aus­nehmung den Durchmesser der Bremskugel übersteigt und die Feder derart ausgebildet ist, dass die Bremskugel unter Spannen der Feder zum Treibkolben getrieben wird und dabei am eintreibrichtungsseitigen Ende der Ausnehmung zur Anlage kommt.According to the invention, the object is achieved in that the axial extent of the recess exceeds the diameter of the brake ball with respect to the piston axis and the spring is designed such that the brake ball is underneath Tensioning the spring is driven to the driving piston and comes to rest at the end of the recess in the direction of driving.

In Zündbereitschaftsstellung liegt die Bremskugel unter Ab­stützung an der Feder und an dem der Eintreibrichtung ab­gewandten Ende der Ausnehmung an der Mantelfläche des Schaf­tes des Treibkolbens an. Verschiebt sich der Treibkolben in Eintreibrichtung, so nimmt dieser mit Beginn des Verschie­bens die Bremskugel unter Abrollen in der Ausnehmung in Ein­treibrichtung mit. Die Bremskugel spannt dabei die Feder und kommt am eintreibrichtungsseitigen Ende der Ausnehmung zur Anlage. Die von der Feder radial gegen den Schaft des Treib­kolbens gedrückte Bremskugel übt Bremswirkung auf den Treib­kolben aus. Bereits durch geringfügiges Verschieben des Treib­kolbens nach hinten kann die Bremswirkung aufgehoben werden, indem die Bremskugel entgegen der Eintreibrichtung wandert und die Feder sich entspannt. Dabei wird von der Bremskugel eine entgegen der Eintreibrichtung wirkende Kraft auf den Treibkolben eingeleitet. Nach dem Entspannen der Feder drückt diese die Bremskugel nicht mehr gegen den Schaft des Treibkol­bens.In the ignition-ready position, the brake ball is supported on the spring and on the end of the recess facing away from the driving-in direction on the outer surface of the shaft of the driving piston. If the driving piston moves in the driving-in direction, it takes the braking ball with it in the recess in the driving-in direction as it begins to move while rolling in the recess. The brake ball tensions the spring and comes to rest at the end of the recess in the direction of driving. The brake ball pressed radially against the shaft of the drive piston by the spring exerts a braking effect on the drive piston. The braking effect can be canceled by slightly moving the driving piston backwards by moving the braking ball against the driving direction and releasing the spring. In this case, a force acting against the driving direction is applied to the driving piston by the brake ball. After the spring has been released, it no longer presses the brake ball against the shaft of the driving piston.

Die axiale Erstreckung der Ausnehmung entspricht zweckmässig dem 1,2- bis 2-fachen des Durchmessers der Bremskugel. Diese Auslegung gewährleistet das Erlangen der jeweiligen Funktions­stellung nach kurzem Bewegungsweg des Treibkolbens und da­durch rasches Steuern der Bremswirkung.The axial extent of the recess suitably corresponds to 1.2 to 2 times the diameter of the brake ball. This design ensures that the respective functional position is achieved after a short movement of the driving piston and thus rapid control of the braking effect.

Mit Vorteil weist die Feder eine radial zum Treibkolben hin wirkende Federkraft und eine auf die Bremskugel einwirkende Abstützfläche auf, die zur Kolbenachse unter Bildung eines spitzen, sich entgegen der Eintreibrichtung öffnenden Winkels geneigt ist. Die Abstützfläche leitet die radiale Federkraft der Feder in einer entgegen der Eintreibrichtung wirkenden und einer radial zum Treibkolben hin wirkenden Komponente in die Bremskugel ein. Der spitze Winkel liegt zweckmässig zwischen 3° und 9°.The spring advantageously has a spring force acting radially towards the driving piston and a supporting surface acting on the brake ball, which is inclined to the piston axis to form an acute angle that opens against the driving direction. The support surface introduces the radial spring force of the spring into the brake ball in a component which acts counter to the driving-in direction and a component which acts radially towards the driving piston. The acute angle is suitably between 3 ° and 9 °.

Als einfache und störungsunanfällige Lösung bewährt sich eine Feder, die zweckmässigerweise als Federring ausgebildet ist, dessen Innenkontur die Abstützfläche bildet. Bei Vor­handensein von zwei oder mehreren, uber den Umfang des Treibkolbens verteilt angeordneten Bremskugeln liegt ein weiterer Vorteil darin, dass der Federring gleichzeitig alle Bremskugeln mit gleichen Kräften beaufschlagt.A spring, which is expediently designed as a spring ring, the inner contour of which forms the support surface, has proven to be a simple and trouble-free solution. If there are two or more brake balls distributed over the circumference of the drive piston, a further advantage is that the spring ring simultaneously applies the same forces to all brake balls.

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

  • Fig. 1 ein pulverkraftbetriebenes Setzgerät, in Zünd­bereitschaftsstellung, teilweise im Längsschnitt;
  • Fig. 2 einen Teil eines Federringes des Gerätes nach Fig. 1, in vergrösserter Darstellung;
  • Fig. 3 den Vorderbereich des Setzgerätes nach Fig. 1, in vergrösserter Darstellung;
  • Fig. 4 den Vorderbereich des Setzgerätes analog Fig. 3 bei vorlaufendem Treibkolben.
The invention is explained in more detail below with reference to drawings which show an exemplary embodiment. Show it:
  • Figure 1 is a powder-powered setting tool, in the ignition ready position, partially in longitudinal section.
  • FIG. 2 shows part of a spring ring of the device according to FIG. 1, on an enlarged scale;
  • 3 shows the front area of the setting tool according to FIG. 1, in an enlarged representation;
  • Fig. 4 shows the front area of the setting tool analogous to Fig. 3 with the driving piston advancing.

Das in Fig. 1 dargestellte Setzgerät verfügt über ein Gehäuse 1 mit Handgriff 2 und Trigger 3. Mit dem eintreibrichtungssei­tigen Ende des Gehäuses 1 ist eine Anschlagmuffe 4 verschraubt. Im Gehäuse ist eine zweiteilige Kolbenführung 5 verschiebbar ge­lagert. Die Kolbenführung 5 besteht aus einem hinteren Teil 6 und einem vorderen Teil 7. In der Kolbenführung 5 befindet sich ein Treibkolben 8 mit einem im Teil 6 geführten Kopf 9 und einem in einem Teil 7 geführten Schaft 11. In eine Führungsbohrung 12 des Teiles 6 mündet hinterseitig ein Zuströmkanal 13 für die Ex­pansionsgase einer Pulvertreibladung. Vorderseitig weist das Teil 6 Durchbrüche 14 zum Ableiten der vor dem Kopf 9 befind­lichen Luft beim Vorlaufen des Treibkolbens 8 auf. Der vorde­re Endbereich des Teiles 6 übergreift konzentrisch den hinteren Bereich des Teiles 7. Das Teil 7 überragt die Anschlagmuffe 4 nach vorne und bildet so ein Mündungsrohr. Das hintere Ende des Teiles 7 ragt in Form eines rohrförmigen Fortsatzes in die Führungsbohrung 12 und bildet so einen den Vorlaufweg des Treib­kolbens 8 begrenzenden Anschlag 15.The setting tool shown in FIG. 1 has a housing 1 with a handle 2 and trigger 3. A stop sleeve 4 is screwed to the end of the housing 1 on the driving direction. A two-part piston guide 5 is slidably mounted in the housing. The piston guide 5 consists of a rear part 6 and a front part 7. In the piston guide 5 there is a driving piston 8 with a head 9 guided in part 6 and a shaft 11 guided in part 7. A guide bore 12 of part 6 opens out on the rear side an inflow duct 13 for the expansion gases of a powder propellant charge. On the front, the part 6 has openings 14 for discharging the air located in front of the head 9 when the driving piston 8 advances. The front end area of part 6 concentrically overlaps the rear area of part 7. Part 7 projects beyond stop sleeve 4 forward and thus forms a muzzle tube. The rear end of the part 7 protrudes in the form of a tubular extension into the guide bore 12 and thus forms a stop 15 which limits the advance path of the driving piston 8.

In einem durchmessermässig erweiterten Abschnitt des Teiles 7 sind einander diametral gegenüberliegend radial nach innen und aussen offene Ausnehmungen 16 vorgesehen. Wie die Fig. 3 verdeutlicht, ist in jeder Ausnehmung 16 eine Bremskugel 17 gelagert, wobei die Axialerstreckung der Ausnehmungen 16 dem 1,5-fachen des Durchmessers der Bremskugeln 17 entspricht. Nach innen sind die Ausnehmungen 16 verengt, um ein Durchfal­len der Bremskugeln 17 zu verhindern. Die Bremskugeln 17 liegen radial am Schaft 11 des Treibkolbens 8 an. Sie stüt­zen sich dabei nach aussen an einer Feder 18 in Form eines Federringes ab. Die Feder 18 weist hierzu eine durch die Innenkontur gebildete umlaufende Abstützfläche 18a auf. Die Abstützfläche 18a ist unter Bildung eines spitzen, sich ent­gegen der Eintreibrichtung öffnenden Winkels a zur Kolben­achse geneigt, wie dies die Fig. 2 verdeutlicht. An die Ab­stützfläche 18a schliesst sich nach vorne, dh in Eintreib­richtung, eine zylindrische Zone der Innenkontur an. Die Feder 18 ist durch einen Schlitz 18b durchtrennt, um ein Aufweiten und Spannen zu ermöglichen. Zur Lagerung der Feder 18 ist im Teil 7 eine Ringnut 19 vorgesehen, welche die Aus­nehmungen 16 durchsetzt. Der Boden der Ringnut 19 begrenzt die radiale Einfederung der Feder 18.In a diametrically opposed section of part 7, recesses 16 are provided diametrically opposite one another, radially inward and outward. As illustrated in FIG. 3, a brake ball 17 is mounted in each recess 16, the axial extent of the recesses 16 corresponding to 1.5 times the diameter of the brake balls 17. The recesses 16 are narrowed inwards to prevent the brake balls 17 from falling through. The brake balls 17 rest radially on the shaft 11 of the drive piston 8. They are supported on the outside on a spring 18 in the form of a spring ring. For this purpose, the spring 18 has a circumferential support surface 18a formed by the inner contour. The support surface 18a is inclined to form an acute angle a, which opens against the driving direction, with respect to the piston axis, as is illustrated in FIG. 2. A cylindrical zone of the inner contour adjoins the support surface 18a to the front, ie in the driving-in direction. The spring 18 is cut through a slot 18b to allow expansion and tensioning. To support the spring 18, an annular groove 19 is provided in part 7, which passes through the recesses 16. The bottom of the annular groove 19 limits the radial deflection of the spring 18.

Im Teil 7 sind ferner Axialbohrungen 21 vorgesehen, deren Mündung nach vorne weist und in der Axialprojektion der Brems­kugeln 17 liegt. In den Axialbohrungen 21 sind Zylinderfedern 22 abgestützt, welche die Bremskugeln 17 nach vorne in Anlage zu der Abstützfläche 18a bringen.In part 7, axial bores 21 are also provided, the mouth of which points forward and lies in the axial projection of the brake balls 17. In the axial bores 21, cylinder springs 22 are supported, which bring the brake balls 17 forward into contact with the support surface 18a.

In der den Fig. 1 und 3 entnehmbaren Zündbereitschaftsstel­lung des Setzgerätes liegen die Bremskugeln 17 ohne Feder­wirkung der Feder 18 am Schaft 11 radial an. Verschiebt sich der Treibkolben 8 in Eintreibrichtung, nimmt der Schaft 11 die Bremskugeln 17 nach vorne mit, bis diese am eintreib­ richtungsseitigen Ende 16a der Ausnehmung 16 auflaufen, wie dies die Fig. 4 zeigt. Die Bremskugeln 17 weiten dabei durch Einlaufen in die Abstützfläche 18a die Feder 18 radial auf und werden so von der Feder 18 gegen den Schaft 11 gedrückt. Dies führt zu einer Bremswirkung des Treibkolbens 8 in Ein­treibrichtung.In the ignition ready position of the setting tool, which can be seen in FIGS. 1 and 3, the brake balls 17 rest radially on the shaft 11 without spring action of the spring 18. If the driving piston 8 moves in the driving direction, the shaft 11 takes the brake balls 17 forward until they drive in direction-side end 16a of the recess 16, as shown in FIG. 4. The brake balls 17 radially expand the spring 18 by running into the support surface 18a and are thus pressed against the shaft 11 by the spring 18. This leads to a braking effect of the driving piston 8 in the driving-in direction.

Wird der Treibkolben 8 aus einer vorderen Stellung entgegen der Eintreibrichtung verschoben, so wandern die Bremskugeln 17 mit Beginn der Verschiebung entgegen der Eintreibrich­tung und laufen an dem der Eintreibrichtung abgewandten Ende 16b der Ausnehmung 16 auf, wie dies die Fig. 3 zeigt. Die Bremskugeln 17 gelangen dabei wieder aus dem Spannbereich der Feder 18, wodurch die Bremswirkung gegenüber dem Treibkolben 8 aufgehoben wird. Der Treibkolben 8 lässt sich im weiteren ohne Bremswirkung in Zündbereitschaftsstellung bringen.If the driving piston 8 is displaced from a front position against the driving direction, the brake balls 17 migrate against the driving direction at the beginning of the displacement and run on the end 16b of the recess 16 facing away from the driving direction, as shown in FIG. 3. The brake balls 17 come out of the clamping range of the spring 18 again, whereby the braking effect against the drive piston 8 is canceled. The driving piston 8 can be brought into the ignition-ready position without braking effect.

Befindet sich der Treibkolben 8 in Zündbereitschaftsstellung, so besteht die Möglichkeit, dass sich dieser vor dem Zünden der Pulvertreibladung, beispielsweise zufolge harten Aufset­zens des Setzgerätes auf dem Untergrund, geringfügig in Ein­treibrichtung verschiebt. Durch dieses Verschieben wird über die Bremskugeln 17 die Feder 18 gespannt. Ueber die geneigte Abstützfläche 18a bewirkt die Federspannung ein unverzügliches Zurücktreiben des Treibkolbens 8 durch die Bremskugeln 17 in Zündbereitschaftsstellung.If the driving piston 8 is in the ready-to-ignite position, there is the possibility that it shifts slightly in the driving-in direction before the powder propellant is ignited, for example after the setting tool has been placed hard on the ground. As a result of this displacement, the spring 18 is tensioned over the brake balls 17. Via the inclined support surface 18a, the spring tension causes the drive piston 8 to be immediately driven back by the brake balls 17 in the ready-to-fire position.

Claims (4)

1. Pulverkraftbetriebenes Setzgerät mit einer Kolbenfüh­rung (5) und einem darin verschiebbaren Treibkolben (8), wobei in der Kolbenführung (5) eine zum Treibkolben (8) hin radial offene Ausnehmung (16) mit am Treibkol­ben (8) anliegender Bremskugel (17) und Feder (18) für die Bremskugel (17) vorgesehen ist, dadurch ge­kennzeichnet, dass in Bezug auf die Kolben­achse die Axialerstreckung der Ausnehmung (16) den Durch­messer der Bremskugel (17) übersteigt und die Feder (18) derart ausgebildet ist, dass die Bremskugel (17) unter Spannen der Feder (18) zum Treibkolben (8) getrie­ben wird und dabei am eintreibrichtungsseitigen Ende (16a) der Ausnehmung (16) zur Anlage kommt.1. Powder-powered setting tool with a piston guide (5) and a driving piston (8) displaceable therein, wherein in the piston guide (5) a recess (16) radially open towards the driving piston (8) with brake ball (17) resting on the driving piston (8) and spring (18) is provided for the brake ball (17), characterized in that, with respect to the piston axis, the axial extent of the recess (16) exceeds the diameter of the brake ball (17) and the spring (18) is designed such that the Brake ball (17) is driven by tensioning the spring (18) to the driving piston (8) and thereby comes into contact with the end (16a) of the recess (16) on the driving direction side. 2. Setzgerät nach Anspruch 1, dadurch gekennzeichnet, dass die Axialerstreckung der Ausnehmung (16) dem 1,2- bis 2-fachen des Durchmessers der Bremskugel (17) entspricht.2. Setting tool according to claim 1, characterized in that the axial extent of the recess (16) corresponds to 1.2 to 2 times the diameter of the brake ball (17). 3. Setzgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Feder (18) eine radial zum Treibkolben (8) hin wirkende Federkraft und eine auf die Bremskugel (17) einwirkende Abstützfläche (18a) aufweist, die zur Kolben­achse unter Bildung eines spitzen, sich entgegen der Eintreibrichtung öffnenden Winkels (a) geneigt ist.3. Setting tool according to claim 1 or 2, characterized in that the spring (18) has a spring force acting radially towards the driving piston (8) and a supporting surface (18a) acting on the brake ball (17), which point towards the piston axis to form a point , is inclined against the opening direction (a). 4. Setzgerät nach Anspruch 3, dadurch gekennzeichnet, dass die Feder (18) als Federring ausgebildet ist, an dessen Innenkontur die Abstützfläche (18a) angeordnet ist.4. Setting tool according to claim 3, characterized in that the spring (18) is designed as a spring ring, on the inner contour of which the support surface (18a) is arranged.
EP89810360A 1988-06-10 1989-05-17 Powder-actuated fastening tool Expired - Lifetime EP0346275B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810360T ATE72160T1 (en) 1988-06-10 1989-05-17 POWDER-POWERED SETTING TOOL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3819813A DE3819813A1 (en) 1988-06-10 1988-06-10 POWDER POWERED SETTING DEVICE
DE3819813 1988-06-10

Publications (2)

Publication Number Publication Date
EP0346275A1 true EP0346275A1 (en) 1989-12-13
EP0346275B1 EP0346275B1 (en) 1992-01-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810360A Expired - Lifetime EP0346275B1 (en) 1988-06-10 1989-05-17 Powder-actuated fastening tool

Country Status (8)

Country Link
US (1) US4941391A (en)
EP (1) EP0346275B1 (en)
JP (1) JP2582899B2 (en)
KR (1) KR950014450B1 (en)
AT (1) ATE72160T1 (en)
AU (1) AU606526B2 (en)
CA (1) CA1323466C (en)
DE (2) DE3819813A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0779132A1 (en) 1995-12-13 1997-06-18 Societe De Prospection Et D'inventions Techniques Spit Apparatus for attaching fasteners
EP0782902A1 (en) * 1995-12-27 1997-07-09 HILTI Aktiengesellschaft Grooved piston
EP0818281A2 (en) * 1996-07-09 1998-01-14 Beto-Tornado GmbH Powder-actuated bolt driving tool
US6092710A (en) * 1998-06-09 2000-07-25 Berner Gmbh Explosive powder charge operated bolt-setting tool
FR2820673A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
FR2820669A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
FR2820676A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
FR2820675A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
FR2820671A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
FR2820674A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
FR2820672A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
EP2233250A1 (en) * 2009-03-27 2010-09-29 Hon Kan Cheung Apparatus for shooting a nail
CN102039579A (en) * 2010-09-03 2011-05-04 赵芬 Automatic repeating poking mechanism
EP2769808A1 (en) * 2013-02-22 2014-08-27 King Fai Kenneth Kok Stress relaxation device for nail guns

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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
DE19755730A1 (en) * 1997-12-15 1999-06-17 Hilti Ag Compressed gas operated bolt fixing gun
US6059162A (en) * 1998-10-16 2000-05-09 Illinois Tool Works Inc. Exhaust baffle and spring assisted reset and dampener for powder actuated tool
FR2787149B1 (en) * 1998-12-09 2001-01-05 Giat Ind Sa PYROTECHNIC UNLOCKING DEVICE
AUPP770598A0 (en) * 1998-12-14 1999-01-14 Ramset Fasteners (Aust.) Pty. Limited Power actuated tools
AU765697B2 (en) * 1998-12-14 2003-09-25 Illinois Tool Works Inc. Power actuated tools
AUPQ292499A0 (en) * 1999-09-17 1999-10-07 Cetram Pty Limited Power actuated tools
US7262778B1 (en) 2000-02-11 2007-08-28 Sony Corporation Automatic color adjustment of a template design
DE10033498B4 (en) * 2000-07-10 2004-02-12 Kersten, Olaf, Dr. Powder-powered setting tool
DE10105883C2 (en) * 2001-02-09 2002-12-05 Hilti Ag piston holder
US6679411B2 (en) 2001-12-21 2004-01-20 Illinois Tool Works Inc. Piston retention system for a fastener driving tool
DE10254964B4 (en) * 2002-11-26 2014-02-13 Hilti Aktiengesellschaft setting tool
FR2848489B1 (en) * 2002-12-11 2006-02-03 Prospection & Inventions INDIRECT SHIELDING APPARATUS
DE10358578A1 (en) * 2003-12-15 2005-07-14 Hilti Ag Internal combustion setting device
DE10358576A1 (en) * 2003-12-15 2005-07-28 Hilti Ag Internal combustion setting device
DE102007000135A1 (en) * 2007-03-08 2008-09-11 Hilti Ag Hand tool with pneumatic percussion
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CN112264964B (en) * 2020-09-29 2024-03-05 南京腾亚精工科技股份有限公司 Nail shooter firing device

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Cited By (19)

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Publication number Priority date Publication date Assignee Title
EP0779132A1 (en) 1995-12-13 1997-06-18 Societe De Prospection Et D'inventions Techniques Spit Apparatus for attaching fasteners
FR2742375A1 (en) * 1995-12-13 1997-06-20 Spit Soc Prospect Inv Techn FIXING PAD SEALING APPARATUS
US5881940A (en) * 1995-12-13 1999-03-16 Societe De Prospection Et D'inventions Techniques (Spit) Apparatus for sealing fixing plugs
EP0782902A1 (en) * 1995-12-27 1997-07-09 HILTI Aktiengesellschaft Grooved piston
US5950900A (en) * 1995-12-27 1999-09-14 Hilti Aktiengesellschaft Explosive powder charged operated setting tool
EP0818281A2 (en) * 1996-07-09 1998-01-14 Beto-Tornado GmbH Powder-actuated bolt driving tool
EP0818281A3 (en) * 1996-07-09 1998-03-18 Beto-Tornado GmbH Powder-actuated bolt driving tool
US6092710A (en) * 1998-06-09 2000-07-25 Berner Gmbh Explosive powder charge operated bolt-setting tool
FR2820673A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
FR2820669A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
FR2820676A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
FR2820675A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
FR2820671A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
FR2820674A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
FR2820672A1 (en) * 2001-02-09 2002-08-16 Hilti Ag HOLDER PISTON
US6478208B2 (en) 2001-02-09 2002-11-12 Hilti Aktiengesellschaft Holder for a drive piston of a setting tool
EP2233250A1 (en) * 2009-03-27 2010-09-29 Hon Kan Cheung Apparatus for shooting a nail
CN102039579A (en) * 2010-09-03 2011-05-04 赵芬 Automatic repeating poking mechanism
EP2769808A1 (en) * 2013-02-22 2014-08-27 King Fai Kenneth Kok Stress relaxation device for nail guns

Also Published As

Publication number Publication date
KR950014450B1 (en) 1995-11-28
DE3819813A1 (en) 1989-12-14
DE58900790D1 (en) 1992-03-12
JP2582899B2 (en) 1997-02-19
JPH0224067A (en) 1990-01-26
KR900000168A (en) 1990-01-30
AU3605989A (en) 1989-12-14
EP0346275B1 (en) 1992-01-29
ATE72160T1 (en) 1992-02-15
US4941391A (en) 1990-07-17
CA1323466C (en) 1993-10-26
AU606526B2 (en) 1991-02-07

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